CN103056045B

CN103056045B - For the primary cyclone of gas purification, gas cleaning system, gas purifying method and application thereof

Info

Publication number: CN103056045B
Application number: CN201110324347.8A
Authority: CN
Inventors: 唐煜; 武兴彬; 闫国春; 胡先君; 姜兴剑; 余建良; 申屠春田; 兰秀菊; 周丛; 冯长志; 石文秀; 刘泽; 赵玉勇; 孙高攀; 李剑晖; 郑全海; 王鑫; 张俊; 王善章
Original assignee: China Shenhua Coal to Liquid Chemical Co Ltd; Shenhua Group Corp Ltd; Baotou Coal Chemical Branch of China Shenhua Coal To Liquid Chemical Co Ltd
Current assignee: China Shenhua Coal to Liquid Chemical Co Ltd; Shenhua Group Corp Ltd; Baotou Coal Chemical Branch of China Shenhua Coal To Liquid Chemical Co Ltd
Priority date: 2011-10-21
Filing date: 2011-10-21
Publication date: 2015-08-26
Anticipated expiration: 2031-10-21
Also published as: CN103056045A

Abstract

The invention provides a kind of primary cyclone for gas purification, gas cleaning system, gas purifying method and application.This primary cyclone (7) comprising: one cyclonic raw gas entrance (702), is arranged in primary cyclone (7) upper portion side wall; One cyclonic atomization grey water inlet (710), is arranged in primary cyclone (7) upper portion side wall, and is positioned at the top of the first raw gas entrance (702); One cyclonic washing water inlet (708), is arranged in primary cyclone (7) upper portion side wall, and is atomized grey water inlet (710) with one cyclonic and is arranged in the disk symmetric position of same level position; One cyclonic gas exit (704), is arranged on the top wall of primary cyclone (7); And one cyclonic Heisui River outlet (706), be arranged in the base wall of primary cyclone (7).This primary cyclone and gas cleaning system using water wisely, low, the de-dirt efficiency of equipment manufacturing cost are high.

Description

For the primary cyclone of gas purification, gas cleaning system, gas purifying method and application thereof

Technical field

The present invention relates in general to and belongs to Coal Gasification Technology field, be specifically related to a kind of primary cyclone for coal gas high-efficient washing process for purifying, the gas cleaning system comprising it, gas purifying method and application thereof, the process for purifying of the coal gas that the pressurized gasification being especially raw material with coal, petroleum coke, living beings, flammable trade waste is produced and system and application thereof.

Background technology

In the pressure gasifying gas being raw material with coal, petroleum coke, living beings, flammable trade waste, except containing CO and H ₂etc. outside active ingredient, also containing CO ₂, H ₂o, H ₂s, COS, CH ₄, N ₂, Ar, NH ₃, the component such as HCN, HCl, HCOOH and lime-ash, early stage, the object of purification was the NH removed wherein ₃, HCN, HCl, HCOOH and lime-ash etc., with for civilian use and further conversion, remove CO ₂, H ₂o, H ₂s, COS, CH ₄and deep processing.Especially for coal compared with the area of horn of plenty, oil relative shortage and country, for providing hydrogen source and coal gas, propelling DCL/Direct coal liquefaction and indirect liquefaction industry, develop integrated gasification combined cycle plants (IGCC) and generate electricity, purify the NH removed wherein the early stage of coal gas ₃, HCN, HCl, HCOOH and lime-ash will seem even more important.

The gas cleaning system of a kind of " orifice or the Venturi scrubber, after with a kind of gas-liquid column scrubber " invented by Texaco Development Corporation is proposed in No. 94117093.4th, Chinese patent application.Practice shows, blocking or fouling easily occur for orifice or Venturi scrubber; Even without blocking, coal gas also can produce the Pressure Drop of about 0.3MPa through orifice or Venturi scrubber, causes energy loss, adds operating cost; Usually there is water phenomenon in the gas-liquid column scrubber in this patent application, affects the normal operation of lower procedure as conversion.

Propose in No. 01112700.7th, Chinese patent application, coal gas first mixes with water in diluter, then enter in cyclone separator and major part is separated containing clinker water, then entering scrubbing tower (is conventional knockout tower, comprise packed tower or plate column, preferred bubble column in plate column) washing.In the process, oarse-grained for the major part in coal gas lime-ash is just separated by cyclone separator, and therefore still some bulky grain lime-ash and a large amount of fine grain coal ash grits are blown in scrubbing tower by high speed coal gas.If packed tower or bubble column, its slot closely on stacking provisions or bubble-cap can cause a large amount of coal ash grit on filler or bubble-cap, stick deposition finally to cause blocking, the air flow method of coal gas in filler or bubble-cap will be no longer even, have impact on clean result, increase the weight of again blocking conversely, be unfavorable for production run steady in a long-term; If common plate column, then cannot reach good cleaning dust effect for trickle grit.

No. 200810018399.0th, Chinese patent application proposes following washing process: a part of Heisui River from scrubbing tower Heisui River storage tank is squeezed in Venturi scrubber with from raw gas out-of-bounds and mixed by scrubbing tower circulating pump, then enters separator, in separator, raw gas enters down-comer via separator gas entry, and the most of lime-ash in raw gas etc. enter liquid phase and flow downward, and raw gas upwards flows, then carries out further water-dust removing through spiral board, afterwards from the coal gas after one-level washing that separator gas exit is gone out, enter the water-bath of scrubbing tower bottom by the scrubbing tower gas entry of scrubbing tower and upwards flow, arrange on scrubbing tower top in some grades of tower trays with from a part of Heisui River from washings circulating pump that scrubbing tower Heisui River Inner eycle entrance is sent into and the technique moisturizing that added by supplementing water entrance, counter current contacting is washed, then upwards by the mist in the baffle plate demister removing coal gas on scrubbing tower top, coal gas after scrubbing tower secondary washing, purifying sends into subsequent conversion operation by the scrubbing tower gas exit of scrubbing tower, the Heisui River that scrubbing tower produces enters black water treatment system by the outlet of scrubbing tower Heisui River.In the process, Venturi scrubber can have good clean result at the initial stage of production run, but after after a while, often there is blocking or structure in Venturi scrubber, its shower nozzle also serious wear gradually, thus affect the clean result of its atomizing effect and clean result and scrubbing tower below widely, and Venturi scrubber often causes the large energy consumption of pressure drop high; In addition, on scrubbing tower top, some grades of tower trays are set, at the bottom of one-level washing, purifying coal gas and scrubbing tower tower, Heisui River (being transmitted by washings circulating pump) counter current contacting is washed, because wash tower bottoms Heisui River is messy, the Heisui River mist that this mode of washing often makes high speed coal gas carry secretly containing impurity passes through demister, like this, one-level washing, purifying coal gas is not only washed further, and long-time past contact causes demister dust stratification to block; Finally, simple tower tray washing is limited for the dust removing effects of the relatively fine particle in coal gas.So this technique is along with the increase of production run time, the cleaning dust effect of needs cannot be reached.

The present invention has abandoned the Venturi scrubber causing easy blocking, easy to wear, easy fouling and pressure drop large, devise a kind of new technology comprising the new equipments such as atomising device, cyclone separator, gas distributor and the spiral tower tray of spraying, object be to provide a kind of equipment manufacturing cost low, remove NH ₃, HCN, HCl, HCOOH and grey slag dust efficiency high, overcome that pressure drop existing for prior art is large, energy consumption is high, the gas cleaning system of the problem such as easy blocking, trickle grit removal efficiency low and work period is short.

Summary of the invention

In order to solve prior art Problems existing, the object of this invention is to provide a kind of primary cyclone for gas purification, the system for gas purification, for the method for gas purification and application thereof, to overcome the large problem of the easy blocking existing for Venturi scrubber that current technology adopts, easy to wear, easy fouling and pressure drop, thus realize equipment manufacturing cost low, remove NH ₃, HCN, HCl, HCOOH and grey slag dust efficiency high, overcome that pressure drop existing for prior art is large, energy consumption is high, the defect such as easy blocking, trickle grit removal efficiency low and work period is short.

Therefore, in one aspect, the invention provides a kind of primary cyclone for gas purification, comprising:

One cyclonic raw gas entrance, is arranged in primary cyclone upper portion side wall;

One cyclonic atomization grey water inlet, is arranged in primary cyclone upper portion side wall, and is positioned at the top of one cyclonic raw gas entrance;

One cyclonic washing water inlet, is arranged in primary cyclone upper portion side wall, and is atomized grey water inlet with one cyclonic and is arranged in the disk symmetric position of same level position;

One cyclonic gas exit, is arranged on the top wall of primary cyclone; And

One cyclonic Heisui River exports, and is arranged in the base wall of primary cyclone.

Preferably, comprise further and be arranged on primary cyclone close to the spaced walls of the back taper internal side wall at middle part being provided with necking down, the bottom of spaced walls is set to ash port.

Preferably, wherein one cyclonic raw gas entrance is tangentially arranged in primary cyclone upper portion side wall, and one cyclonic washing water inlet and one cyclonic atomization grey water inlet are tangentially arranged in the disk symmetric position of same level position in primary cyclone upper portion side wall.

Preferably, wherein one cyclonic atomization grey water inlet is connected with the first mixed aerosol device by pipeline.

Preferably, wherein the first mixed aerosol device comprises further:

Pipe section and gas-liquid premix section,

Wherein, pipe section and gas-liquid premix section share level or vertically disposed first cylindrical shell and extend into the second cylindrical shell that the first cylindrical shell inner concentric arranges, and with pipe section away from the first end of gas-liquid premix section there is the first end wall of closed first cylindrical shell, in the center of the first end wall, there is an outlet

Pipe section is limited by the second cylindrical shell, gas-liquid premix section is limited by the first cylindrical shell, the side being similar to frustum that arranges between the first cylindrical shell and the second cylindrical shell, the side being wherein similar to frustum is at the separated formation annular opening of the first cylindrical shell and the second cylindrical shell

Second cylindrical shell is liquid channel, first cylindrical shell arrange with concentric and the second cylindrical shell extended into and disconnect form annular opening the side being similar to frustum together be defined as gas phase channel, gas phase channel is provided with gas phase entrance.

Preferably, wherein the first mixed aerosol device is symmetrically arranged with supersonic generator on the first cylindrical shell being positioned at premix section outside.

Preferably, wherein the first mixed aerosol device is provided with flange on gas phase entrance, the porch of the second cylindrical shell is provided with flange, the outlet of the first end wall center of the first cylindrical shell is provided with flange, and symmetrically arranged supersonic generator is two, three, four, six or eight.

Preferably, wherein the upstream of gas phase entrance of the gas phase channel entering the first mixed aerosol device is provided with the first pressure-regulating valve, the downstream of the outlet of the first end wall is provided with the first pressure transmitter, the upstream line entering liquid channel 6 is provided with first flow control valve and first flow transmitter, the downstream of the grey water pipeline of the atomization of the outlet leaving the first mixed aerosol device is provided with second adjustable valve and second transmitter.

Preferably, the upstream line of the liquid channel wherein between the liquid channel entrance and first flow control valve of the first mixed aerosol device is also provided with the first antisludging agent pipeline, and is provided with control valve thereon.

In yet another aspect, the invention provides a kind of system for gas purification, it is characterized in that, comprising:

1) primary cyclone of the present invention described above; And

2) elementary scrubbing tower;

Wherein, elementary scrubbing tower is provided with from top to bottom: elementary scrubbing tower gas exit, elementary scrubbing tower circumferential spiral tower tray, at least one deck spray thrower, elementary scrubbing tower gas entry pipeline and the outlet of elementary scrubbing tower Heisui River; Elementary scrubbing tower gas exit and the outlet of elementary scrubbing tower Heisui River are separately positioned on top and the bottom of elementary scrubbing tower, elementary scrubbing tower circumferential spiral tower tray is arranged at the top of elementary scrubbing tower, elementary scrubbing tower gas entry install pipeline is in the bottom of elementary scrubbing tower, and one cyclonic gas exit is connected to elementary scrubbing tower gas entry pipeline;

Elementary scrubbing tower circumferential spiral tower tray comprises further:

I) the first spray column inlet duct, be arranged on elementary side, scrubbing tower top and with the tower wall perpendicular of elementary scrubbing tower, the first spray column inlet duct comprises the first spray column entrance extended outside elementary scrubbing tower tower wall further;

Ii) the first spray column, it is connected with the approximate center perpendicular of the first spray column inlet duct at elementary scrubbing tower, and is evenly distributed with multiple first spray holes in the surrounding of the first spray column; And

Iii) the first helical tray main body, the inner side of the first helical tray main body, by setting of spiraling in the initial lateral around the first spray column of its lower edge, engages with the inwall of elementary scrubbing tower outside it, and closes the lower end of the first spray column.

Preferably, wherein at least one deck spray thrower is symmetrically arranged with multiple spray thrower.

More preferably, wherein at least the upstream of one deck spray thrower is connected with the first mixed aerosol device by pipeline.

Preferably, wherein at least also be provided with elementary scrubbing tower grey water inlet between one deck spray thrower and elementary scrubbing tower gas entry pipeline, the washings of secondary cyclone from secondary cyclone gray water outlet out, enter the first grey water inlet of just scrubber.

Preferably, wherein above the outlet of elementary scrubbing tower gas entry pipeline, there is loose gas net around elementary scrubbing tower gas entry install pipeline, loose gas net outside engages with the inwall of elementary scrubbing tower, the synthesis gas leaving down-comer carries a large amount of ashes, after two-layer loose gas net, air pocket is originally divided into some cat-eyes or less bubble, and synthesis gas and chilled water contact area are improved greatly, thus can wash out more solid particle in synthesis gas.

More preferably, wherein the first spray column inlet duct upstream is connected with the second antisludging agent pipeline by pipeline, and the second antisludging agent pipeline installing has control valve.

Preferably, the system of gas purification of the present invention, comprises further:

4) secondary wash tower, it comprises further:

4.1) gas buffer room, is arranged on secondary wash tower bottom;

4.2) first dedusting gas entry pipe, its tower wall through secondary wash tower and extend into gas buffer indoor;

4.3) gas distributor, be arranged on above first dedusting gas entry pipe, and comprise water-bath and Heisui River discharge pipe, it is connected on the inwall of the sidewall of secondary wash tower by gas distributor support member disposed thereon;

4.4) secondary wash cobwebs and dirt under ceiling water out, is arranged on the tower wall of the secondary wash tower above gas distributor, and below the liquid level being positioned at secondary wash tower;

4.5) secondary wash tower circumferential spiral tower tray, is arranged on the ullage of secondary wash tower inside;

4.6) steam condensate entrance, is arranged on the tower wall of the secondary wash tower above secondary wash tower circumferential spiral tower tray; And

4.7) dustless gas exit, is arranged on the top of secondary wash tower;

Wherein, elementary scrubbing tower gas exit is communicated with the first dedusting gas entry pipe of secondary wash tower by pipeline.

Preferably, the system of gas purification of the present invention, comprises further in the upstream of secondary wash tower:

3) secondary cyclone, be provided with secondary rotary air gas entrance, secondary whirlwind washing water inlet, the outlet of secondary rotary air gas and secondary cyclone gray water outlet, wherein secondary whirlwind washing water inlet is arranged on secondary rotary air gas entrance top, secondary rotary air gas entrance and secondary whirlwind washing water inlet are tangentially arranged in the upper portion side wall of secondary cyclone respectively, and the outlet of secondary rotary air gas and secondary cyclone gray water outlet are separately positioned on top and the bottom of secondary cyclone;

Condition is, wherein elementary scrubbing tower gas exit is communicated with the secondary rotary air gas entrance of secondary cyclone by pipeline, the secondary rotary air gas outlet of secondary cyclone is communicated with the first dedusting gas entry pipe of secondary wash tower by pipeline, and wherein elementary scrubbing tower gas exit is not communicated with the first dedusting gas entry pipe of secondary wash tower by pipeline.

Preferably, at least two-layer tower tray is provided with further between the ullage wherein in secondary wash tower inside and secondary wash tower circumferential spiral tower tray.

Preferably, above secondary wash tower circumferential spiral tower tray and between steam condensate entrance, be wherein provided with the solid valve tower tray of multilayer further.

Preferably, wherein above the solid valve tower tray of the multilayer of secondary wash tower and steam condensate entrance, also Combined defoamer is provided with.

Preferably, wherein secondary wash tower circumferential spiral tower tray, comprises further:

4.5.1) the second spray column inlet duct, be arranged on side, secondary wash tower top and with the tower wall perpendicular of secondary scrubber, second spray column inlet duct comprises the second spray column entrance extended outside secondary wash tower tower wall further, and the second spray column inlet duct is connected with the second mixed aerosol device by pipeline;

4.5.2) the second spray column, it is connected with the approximate center perpendicular of the second spray column inlet duct at secondary wash tower, and is evenly distributed with multiple second spray holes in the surrounding of the second spray column; And

4.5.3) the second helical tray main body, the inner side of the second helical tray main body is by setting of spiraling in the initial lateral around the second spray column of its lower edge, engage with the inwall of secondary wash tower outside it, and the second spray column extends downward beyond the lower end of the second helical tray main body, and extend downward beyond on the sidewall of the second helical tray main body lower end and bottom surface, lower end at the second spray column and be provided with multiple second spray holes.

Preferably, the system of gas purification of the present invention, is wherein also provided with gas distributor in the bottom of secondary wash tower, and this gas distributor comprises further:

1) gas buffer room, is arranged on the bottom section of secondary wash tower, and it is made up of the bottom sidewall of the Heisui River discharge pipe that the bottom of the water-bath be connected with the sidewall of secondary wash tower and its are arranged and secondary wash tower and lower wall;

2) first dedusting gas entry pipe, runs through the sidewall of secondary wash tower and in horizontal " L " type, its gas entry is arranged on outside the sidewall of secondary wash tower, and its gas exit is arranged on gas buffer chamber interior, and also Open Side Down;

3) gas distribution member, it comprises further:

I) at least two annular gas distributed pipelines arranged roughly with one heart;

Ii) at least the first connecting bridge and the second connecting bridge, be arranged between at least two annular gas distributed pipelines in gas distribution member, at least the first connecting bridge and the second connecting bridge inside are hollow, and gas between at least two annular gas distributed pipelines is communicated with;

Iii) at least one wireway, it to be arranged in water-bath and to be communicated with the gas in the first connecting bridge cavity, makes to be communicated with gas distribution member gas; And

4) gas distributor support member, it is arranged on gas distribution member, makes gas distribution member be connected on the inwall of the sidewall of secondary wash tower;

Wherein, at least two annular gas distributed pipelines in gas distribution member are provided with multiple straight hole at it with at least the first connecting bridge and the second connecting bridge on the direction bottom water-bath, and at least two annular gas distributed pipelines in gas distribution member are provided with multiple tangential hole with multiple straight hole interleaved at it on the direction bottom water-bath, the opening of multiple tangential hole is set to tilt laterally down.

Preferably, the system of gas purification of the present invention, wherein gas distribution member is made up of the annular gas distributed pipeline that three are arranged roughly with one heart, at least one wireway is set to 2 wireways and is symmetricly set on the pipeline of water-bath and the first connecting bridge, and annular gas distributed pipeline is the ring-shaped cylinder structure of hollow.

Preferably, the bottom of the wherein water-bath of gas distributor is set to taper, and the Heisui River discharge pipe that it is arranged is positioned at the central part bottom water-bath.

Preferably, the diameter of multiple straight holes that at least two annular gas distributed pipelines of wherein gas distributor are arranged is 5-80mm, and the length of side of multiple tangential hole is 5-80mm.

Preferably, wherein at least two annular gas distributed pipelines of gas distributor are vertical cross-sections is round pipeline, annular gas distributed pipeline diameter is 30 ~ 300mm, each diameter wherein at least two annular gas distributed pipelines is identical or different, and wherein gas distributor support member is symmetricly set on the outer wall of gas distribution member on the first connecting bridge bearing of trend.

Preferably, wherein at least two annular gas distributed pipelines of gas distributor are a hollow cylindrical structure, its horizontal cross-section is annular, vertical cross-section is rectangle or foursquare pipeline, in it, the difference of outer radius is 30 ~ 300mm, height is 100 ~ 1000mm, in each wherein at least two annular gas distributed pipelines, the difference of outer radius is identical or different, and wherein gas distributor support member is symmetricly set on the outer wall of gas distribution member on the first connecting bridge bearing of trend.

Preferably, the system of gas purification of the present invention, wherein the second mixed aerosol device comprises further:

Pipe section and gas-liquid premix section,

Second cylindrical shell is liquid channel, the first cylindrical shell arrange with concentric and the second cylindrical shell extended into and disconnect form annular opening the side being similar to frustum together be defined as gas phase channel, gas phase channel is provided with gas phase entrance,

Supersonic generator, be symmetricly set on be positioned at premix section outside the first cylindrical shell on.

More preferably, wherein the second mixed aerosol device is provided with flange on gas phase entrance, the porch of the second cylindrical shell is provided with flange, the outlet of the first end wall center of the first cylindrical shell is provided with flange, and symmetrically arranged supersonic generator is two, three, four, six or eight.

More preferably, wherein the upstream of gas phase entrance of the gas phase channel entering the second mixed aerosol device is provided with the second pressure-regulating valve, the downstream of the outlet of the first end wall is provided with the second pressure transmitter, the upstream line entering liquid channel is provided with the 3rd flow control valve and the 3rd flow transmitter, the downstream of the grey water pipeline of the atomization of the outlet leaving the second mixed aerosol device is provided with the 4th flow control valve and the 4th flow transmitter.

In the third aspect, the invention provides a kind of gas purifying method, it is characterized in that the system of the gas purification adopting the present invention described above, the method comprises:

1) from coal gas secondary wash tower buck and/or enter the first mixed aerosol device atomization from the compressed dustless clean gas of rear system and become atomization buck droplet;

2) through the buck droplet of atomization respectively with the raw gas after Quench be atomized grey water inlet, one cyclonic raw gas entrance and one cyclonic washing water inlet from the buck of coal gas secondary wash tower respectively by one cyclonic and tangentially enter primary cyclone;

3) spin in cyclone separator after the buck droplet that the most bulky grain lime-ash in raw gas and part coal ash grit are atomized is moistening motion process in constantly reunite after or sedimentation fall and be separated, or be thrown toward the cyclone separator inwall buck lower immediately by spiral and sweep away and be arranged on primary cyclone and enter in the Heisui River in the dirt discharge groove of primary cyclone bottom formation close to the bottom ash port of the spaced walls in the internal side wall at middle part;

4) Heisui River in dirt discharge groove enters black water treatment system by the one cyclonic Heisui River outlet that primary cyclone base wall is arranged;

5) part enters the elementary scrubbing tower gas entry pipeline of the elementary scrubbing tower of coal gas through the one cyclonic gas exit that the buck droplet of atomization and the lime-ash of coal ash grit and only a few are arranged by primary cyclone top with one cyclonic dedusting coal gas under the carrying secretly of coal gas;

Wherein, buck from secondary wash tower passes through first flow governor valve control flow, the dustless clean gas of compression from rear system controls the pressure of atomization buck by the first pressure-regulating valve, and the second adjustable valve that the buck through being atomized simultaneously entering one cyclonic atomization grey water inlet is arranged by atomization buck line downstream controls flow.

Preferably, gas purifying method of the present invention, comprises further:

6) the one cyclonic dedusting coal gas entering the elementary scrubbing tower gas entry pipeline of elementary scrubbing tower is upwards overflowed by the loose gas net (wherein loose gas net outside engages with the inwall of elementary scrubbing tower) arranged above the outlet of the elementary scrubbing tower gas entry pipeline of elementary scrubbing tower, air pocket is made to be divided into some cat-eyes or less bubble, coal gas and chilled water contact area are increased, thus washes out more solid particle in coal gas;

7) washings of secondary cyclone from secondary cyclone gray water outlet out, and enter elementary scrubbing tower grey water inlet, the coal gas that subtend is overflowed carries out further spraying and dedusting;

8) at least the symmetrically arranged multiple spray thrower of one deck spray thrower carries out further spraying and dedusting to the coal gas continuing upwards to overflow;

9) coal gas continues upwards to be spun up along the first helical tray main body panel by the lower edge of the first helical tray main body of elementary scrubbing tower circumferential spiral tower tray, washings with antisludging agent enter through multiple first spray holes ejections that the first spray column sidewall is arranged by the first spray column inlet duct, carry out spraying and dedusting to coal gas; And

10) coal gas after elementary spraying and dedusting is discharged by the elementary scrubbing tower gas exit being arranged on elementary scrubbing tower top, the bottom of elementary scrubbing tower is set at the bottom of conical tower, solid particle all falls to this, and is discharged by the elementary scrubbing tower Heisui River outlet that bottom is arranged.

Preferably, gas purifying method of the present invention, comprises further:

11) coal gas after elementary spraying and dedusting of discharging through elementary scrubbing tower gas exit enters the secondary rotary air gas entrance be tangentially arranged in the upper portion side wall of secondary cyclone, washings are entered by the secondary whirlwind washing water inlet being arranged on secondary rotary air gas entrance top in an opposite direction and tangentially arranging, the washings of tangential ejection carry out spray washing to coal gas, the first dedusting gas entry pipe of discharging and entering secondary wash tower bottom is exported by the secondary rotary air gas being arranged on secondary cyclone top through first dedusting coal gas, washings after spray washing discharge by the secondary cyclone gray water outlet be arranged on bottom secondary cyclone the elementary scrubbing tower grey water inlet entering elementary scrubbing tower.

Gas purifying method of the present invention, can in step 10) directly carry out step 12 afterwards), or in step 10) after carry out step 11), and then carry out step 12), depend on whether used gas cleaning system of the present invention comprises secondary cyclone.Certainly, even if gas cleaning system of the present invention comprises secondary cyclone, if by pipeline by its bypass, still can in step 10) directly carry out step 12 afterwards).

Preferably, gas purifying method of the present invention, comprises further:

12) coal gas after elementary spraying and dedusting of being discharged by the elementary scrubbing tower gas exit being arranged on elementary scrubbing tower top or alternatively by the secondary rotary air gas being arranged on secondary cyclone top export discharge through first dedusting coal gas, enter the first dedusting gas entry pipe of secondary wash tower bottom, this coal gas enters the first connecting bridge of gas distributor and the gas distribution member be made up of at least two annular gas distributed pipelines by least one wireway be arranged on the gas distributor above first dedusting gas entry pipe in water-bath, and spray from the multiple tangential holes tilted laterally down that the annular gas distributed pipeline of at least two gas distribution member and at least the first connecting bridge and at least two annular gas distributed pipelines of the second connecting bridge in its multiple straight hole arranged towards the direction bottom water-bath and gas distribution member are arranged with multiple straight hole interleaved on the direction bottom water-bath at it, continue upwards to overflow washings liquid level,

13) coal gas overflowing washings liquid level upwards contacts dedusting through at least two-layer tower tray with the high pressure buck entered by high pressure grey water inlet; And

14) coal gas continues upwards to be spun up along the second helical tray main body panel by the lower edge of the second helical tray main body of secondary wash tower circumferential spiral tower tray, washings with antisludging agent enter through multiple second spray holes ejections that the second spray column sidewall is arranged by the second spray column inlet duct, carry out spraying and dedusting to coal gas, the dustless clean gas after dedusting is discharged by the dustless gas exit arranged at secondary wash top of tower;

Wherein, the bottom of the water-bath that secondary wash tower bottom is arranged is taper, and the Heisui River discharge pipe that the coal ash dust in washings is arranged by its portion of bottom centre is discharged.

Preferably, gas purifying method of the present invention, comprises further:

15) continue upwards to contact dedusting by valve tower tray solid with the multilayer arranged between steam condensate entrance above secondary wash tower circumferential spiral tower tray with steam condensate by the coal gas after the dedusting of secondary wash tower circumferential spiral tower tray; And

Coal gas continues upwards to remove by the Combined defoamer being arranged on the solid valve tower tray of multilayer and steam condensate entrance top the micro-foam wherein carried secretly.

More preferably, gas purifying method of the present invention, the moisture dustless clean gas after dedusting of wherein being discharged by the dustless gas exit arranged at secondary wash top of tower enters low temperature/conversion methanol wash column system process, and the pure synthesis gas obtained enters methanol-fueled CLC or F-T synthesis system is reacted; The liquid of the liquid channel of the first mixed aerosol device and the second mixed aerosol device is the water vapour conversion condensate liquid from low temperature/conversion methanol wash column system, enter black water treatment system process from the Heisui River of the Heisui River discharge pipe discharge that the outlet of one cyclonic Heisui River, the outlet of elementary scrubbing tower Heisui River and secondary wash tower bottom are arranged, the buck obtained after black water treatment system process enters the high pressure grey water inlet of secondary wash tower; The buck extracted out through the grey water-circulating pump of secondary wash tower enters respectively:

1. the one cyclonic washing water inlet of primary cyclone, and/or

2. the secondary whirlwind washing water inlet of secondary cyclone, and/or

3. elementary scrubbing tower grey water inlet, and/or,

4. coal gasifier as chilled water and alternatively for slurrying enter coal slurry gasifier reaction produce raw gas, and/or

5. mixed aerosol device is as atomization water, and/or

6. elementary scrubbing tower first spray column inlet duct is as the shower water sprayed to circumferential spiral tower tray side direction.

Wherein, the atomization buck after atomization divides two-way again, and a road enters the one cyclonic atomization grey water inlet of primary cyclone, and another road enters the shower water that elementary scrubbing tower spray thrower sprays as scrubbing tower side direction.

A fourth aspect of the present invention, provides the application in the purification of the coal gas that the present invention's primary cyclone described above is produced at the pressurized gasification being raw material with coal, petroleum coke, living beings and/or flammable trade waste.

5th aspect, the invention provides the application in the purification of the coal gas that the system for gas purification described above is produced at the pressurized gasification being raw material with coal, petroleum coke, living beings and/or flammable trade waste.

6th aspect, the invention provides the application in the purification of the coal gas that gas purifying method described above is produced at the pressurized gasification being raw material with coal, petroleum coke, living beings and/or flammable trade waste.

Accompanying drawing explanation

Fig. 1 a illustrates the primary cyclone according to one embodiment of the present invention;

Fig. 1 b illustrates the elevational schematic view of the primary cyclone of Fig. 1 a along X1-X1 line;

Fig. 1 c illustrates the schematic top plan view of the primary cyclone of Fig. 1 a along X2-X2 line;

Fig. 1 d illustrates the primary cyclone according to another embodiment of the invention;

Fig. 2 a illustrates according to the mixed aerosol device of one embodiment of the present invention vertical profile left view along H2-H2 line;

Fig. 2 b is the elevational schematic of the mixed aerosol device illustrated according to one embodiment of the present invention;

Fig. 2 c illustrates according to the mixed aerosol device of one embodiment of the present invention vertical profile right view along H1-H1 line;

Fig. 3 a is the elevational schematic of the secondary scrubber illustrated according to one embodiment of the present invention;

Fig. 3 b is the elevational schematic of the gas cleaning system that the primary cyclone comprised according to one embodiment of the present invention is shown;

Fig. 3 c is the elevational schematic of the gas cleaning system that the primary cyclone comprised according to another embodiment of the invention is shown;

Fig. 4 a is the elevational schematic of the helical tray of the secondary scrubber illustrated according to one embodiment of the present invention;

Fig. 4 b is the elevational schematic of the helical tray of the elementary scrubbing tower illustrated according to one embodiment of the present invention;

Fig. 4 c is comprising liquid phase distributor and circumferentially combining the elevational schematic of helical tray of bubble cap plate of the secondary scrubber according to the embodiment of the present invention that Fig. 4 a is shown;

Fig. 5 is the schematic diagram of the liquid phase distributor of the secondary scrubber illustrated according to one embodiment of the present invention, the sectional side elevation of liquid phase distributor is shown from top to bottom successively, along the top view of E-E line and the vertical profile runner schematic diagram of liquid phase distributor;

Fig. 6 a illustrates circumferentially to combine the top view of bubble cap plate along F-F line according to the secondary scrubber of one embodiment of the present invention;

Fig. 6 b is the front view circumferentially combining the arc bubble-cap of bubble cap plate of the secondary scrubber illustrated according to one embodiment of the present invention;

Fig. 7 a is the elevational schematic view of gas distribution member along Q1-Q1 line of the gas distributor of the secondary scrubber illustrated according to one embodiment of the present invention;

Fig. 7 b is the schematic top plan view of gas distribution member along Q2-Q2 line of the gas distributor that Fig. 7 a is shown;

Fig. 8 is the schematic top plan view around the loose gas net of elementary scrubbing tower gas entry pipeline in the gas cleaning system that Fig. 3 b is shown; And

Fig. 9 is the upstream and downstream schematic flow sheet that the gas purifying method comprised according to one embodiment of the present invention is shown.

Detailed description of the invention

The following provide the specific embodiment of the present invention.Those skilled in the art should understand that wherein embodiment is only for illustrative purposes, should not be regarded as limiting the scope of the invention defined by the claims by any way.

Therefore, the invention provides a kind of primary cyclone for gas purification.

In a detailed description of the invention, the invention provides a kind of primary cyclone 7 for coal gas high-efficient washing process for purifying, it is characterized in that, comprising:

One cyclonic raw gas entrance 702, is arranged in primary cyclone 7 upper portion side wall;

One cyclonic atomization grey water inlet 710, is arranged in primary cyclone 7 upper portion side wall, and is positioned at the top of one cyclonic raw gas entrance 702;

One cyclonic washing water inlet 708, is arranged in primary cyclone 7 upper portion side wall, and is atomized grey water inlet 710 with one cyclonic and is arranged in the disk symmetric position of same level position;

One cyclonic gas exit 704, is arranged on the top wall of primary cyclone 7; And

One cyclonic Heisui River outlet 706, is arranged in the base wall of primary cyclone 7.

In a preferred embodiment, primary cyclone 7 of the present invention comprises further and is arranged on primary cyclone 7 close to the spaced walls 712 of the back taper internal side wall at middle part being provided with necking down, and the bottom of spaced walls 712 is set to ash port 714.

In a preferred embodiment, wherein one cyclonic raw gas entrance 702 is tangentially arranged in primary cyclone 7 upper portion side wall, and one cyclonic washing water inlet 708 and one cyclonic atomization grey water inlet 710 are tangentially arranged in the disk symmetric position of same level position in primary cyclone 7 upper portion side wall.

In a preferred embodiment, wherein one cyclonic atomization grey water inlet 710 is connected with the first mixed aerosol device 80 by pipeline.

In a preferred embodiment, wherein the first mixed aerosol device 80 comprises further:

Pipe section 801 and gas-liquid premix section 802,

Wherein, pipe section 801 and gas-liquid premix section 802 share level or vertically disposed first cylindrical shell 804, extend into the second cylindrical shell 806 that the first cylindrical shell 804 inner concentric is arranged, and with pipe section 801 away from the first end of gas-liquid premix section 802 there is the first end wall 808 of closed first cylindrical shell 804, in the center of the first end wall 808, there is an outlet 810

Pipe section 801 is limited by the second cylindrical shell 806, gas-liquid premix section 802 is limited by the side 812 being similar to frustum arranged between the first cylindrical shell 804, first cylindrical shell 804 and the second cylindrical shell 806, the side 812 being wherein similar to frustum is at separated formation annular (or taper type) opening 814 of the first cylindrical shell 804 and the second cylindrical shell 806

Second cylindrical shell 806 is liquid channel, first cylindrical shell 804 arrange with concentric and the second cylindrical shell 806 extended into and disconnect form annular opening 814 the side 812 being similar to frustum together be defined as gas phase channel, gas phase channel is provided with gas phase entrance 820.

In one more preferably embodiment, wherein the first mixed aerosol device 80 is symmetrically arranged with supersonic generator 818 on the first cylindrical shell 804 being positioned at premix section 802 outside.

In one more preferably embodiment, wherein the first mixed aerosol device 80 is provided with flange on gas phase entrance 820, the porch of the second cylindrical shell 806 is provided with flange, the outlet 810 of the first end wall 808 center of the first cylindrical shell 804 is provided with flange, and symmetrically arranged supersonic generator 818 is two, three, four, six or eight.

In one more preferably embodiment, wherein the upstream of gas phase entrance 818 of the gas phase channel entering the first mixed aerosol device 80 is provided with the first pressure-regulating valve 822, the downstream of the outlet 810 of the first end wall 808 is provided with the first pressure transmitter 824, the upstream line entering liquid channel 806 is provided with first flow control valve 834 and first flow transmitter 836, the downstream of the grey water pipeline of the atomization of the outlet 810 leaving the first mixed aerosol device 80 is provided with second adjustable valve 838 and second transmitter 839.

In one more preferably embodiment, the upstream line of the liquid channel 806 wherein between liquid channel 806 entrance and first flow control valve 834 of the first mixed aerosol device 80 is also provided with the first antisludging agent pipeline 830, and is provided with control valve 832 thereon.

In another embodiment of the present invention, provide a kind of system 1000 for gas purification, comprising:

1) primary cyclone of the present invention 7 described above; And

2) elementary scrubbing tower 1;

Wherein, elementary scrubbing tower 1 is provided with from top to bottom: elementary scrubbing tower gas exit 110, elementary scrubbing tower circumferential spiral tower tray 10, at least one deck spray thrower 13, elementary scrubbing tower gas entry pipeline 16 and elementary scrubbing tower Heisui River outlet 18; Elementary scrubbing tower gas exit 110 and elementary scrubbing tower Heisui River outlet 18 are separately positioned on top and the bottom of elementary scrubbing tower 1, elementary scrubbing tower circumferential spiral tower tray 10 is arranged at the top of elementary scrubbing tower 1, elementary scrubbing tower gas entry pipeline 16 is arranged at the bottom of elementary scrubbing tower 1, and one cyclonic gas exit 704 is connected to elementary scrubbing tower gas entry pipeline 16;

Elementary scrubbing tower circumferential spiral tower tray 10 comprises further:

I) the first spray column inlet duct 202, be arranged on elementary side, scrubbing tower 1 top and with tower wall 12 perpendicular of elementary scrubbing tower 1, the first spray column inlet duct 202 comprises the first spray column entrance 204 extended outside elementary scrubbing tower 1 tower wall 12 further;

Ii) the first spray column 206, it is connected with the approximate center perpendicular of the first spray column inlet duct 202 at elementary scrubbing tower 1, and is evenly distributed with multiple first spray holes 208 in the surrounding of the first spray column 206; And

Iii) the first helical tray main body 102, the inner side of the first helical tray main body 102 is by setting of spiraling in the initial lateral around the first spray column 206 of its lower edge 104, engage with the inwall 12 of elementary scrubbing tower 1 outside it, and close the lower end of the first spray column 206.

In a preferred embodiment, wherein at least one deck spray thrower 13 is symmetrically arranged with multiple spray thrower.

In one more preferably embodiment, wherein at least the upstream of one deck spray thrower 13 is connected with the first mixed aerosol device 80 by pipeline.

In one more preferably embodiment, wherein at least also be provided with elementary scrubbing tower grey water inlet 14 between one deck spray thrower 13 and elementary scrubbing tower gas entry pipeline 16, the washings of secondary cyclone 9 from secondary cyclone gray water outlet 906 out, enter the first grey water inlet 14 of just scrubber.

In one more preferably embodiment, wherein above the outlet of elementary scrubbing tower gas entry pipeline 16, elementary scrubbing tower gas entry pipeline 16 is provided with loose gas net 15, wherein loose gas net 15 outside engages with the inwall 12 of elementary scrubbing tower, the synthesis gas leaving down-comer 16 carries a large amount of ashes, after two-layer loose gas net, air pocket is originally divided into some cat-eyes or less bubble, synthesis gas and chilled water contact area are improved greatly, thus more solid particle in synthesis gas can be washed out.

In one more preferably embodiment, be wherein connected with the second antisludging agent pipeline 19 by pipeline in the first spray column inlet duct 202 upstream of elementary washing, the second antisludging agent pipeline 19 is provided with control valve 192.

In a preferred embodiment, the system 1000 of gas purification of the present invention, comprises further:

4) secondary wash tower 2, it comprises further:

4.1) gas buffer room 240, is arranged on bottom secondary wash tower 2;

4.2) first dedusting gas entry pipe 26, its tower wall 22 through secondary wash tower 2 and extend in gas buffer room 240;

4.3) gas distributor 60, be arranged on above first dedusting gas entry pipe 26, and comprise water-bath 280 and Heisui River discharge pipe 242, it is connected on the inwall of sidewall 22 of secondary wash tower 2 by gas distributor support member 680 disposed thereon;

4.4) secondary wash cobwebs and dirt under ceiling water out 23, is arranged on the tower wall 22 of the secondary wash tower 2 above gas distributor 60, and below the liquid level 250 being positioned at secondary wash tower 2;

4.5) secondary wash tower circumferential spiral tower tray 10 ', above the liquid level 250 being arranged on secondary wash tower 2 inside;

4.6) steam condensate entrance 232, is arranged on the tower wall 22 of the secondary wash tower 2 above secondary wash tower circumferential spiral tower tray 10; And

4.7) dustless gas exit 210, is arranged on the top of secondary wash tower 2;

Wherein, elementary scrubbing tower gas exit 110 is communicated with the first dedusting gas entry pipe 26 of secondary wash tower 2 by pipeline.

In another preferred embodiment, the system 1000 of gas purification of the present invention, comprises further in the upstream of secondary wash tower 2:

3) secondary cyclone 9, be provided with secondary rotary air gas entrance 902, secondary whirlwind washing water inlet 908, secondary rotary air gas outlet 904 and secondary cyclone gray water outlet 906, wherein secondary whirlwind washing water inlet 908 is arranged on secondary rotary air gas entrance 902 top, secondary rotary air gas entrance 902 and secondary whirlwind washing water inlet 908 are tangentially arranged in the upper portion side wall of secondary cyclone 9 respectively, and secondary rotary air gas outlet 904 and secondary cyclone gray water outlet 906 are separately positioned on top and the bottom of secondary cyclone 9;

Condition is, wherein elementary scrubbing tower gas exit 110 is communicated with the secondary rotary air gas entrance 902 of secondary cyclone 9 by pipeline, the secondary rotary air gas outlet 904 of secondary cyclone 9 is communicated with the first dedusting gas entry pipe 26 of secondary wash tower 2 by pipeline, and wherein elementary scrubbing tower gas exit 110 is not communicated with the first dedusting gas entry pipe 26 of secondary wash tower 2 by pipeline.

In one more preferably embodiment, wherein above the liquid level 250 of secondary wash tower 2 inside and between secondary wash tower circumferential spiral tower tray 10 ', be provided with at least two-layer tower tray 265 further.

In one more preferably embodiment, wherein between secondary wash tower circumferential spiral tower tray 10 ' top and steam condensate entrance 232, be provided with the solid valve tower tray 225 of multilayer further.

In one more preferably embodiment, wherein above the solid valve tower tray 225 of the multilayer of secondary wash tower 2 with steam condensate entrance 232, be also provided with Combined defoamer 290.

In one more preferably embodiment, wherein secondary wash tower circumferential spiral tower tray 10 ', comprises further:

4.5.1) the second spray column inlet duct 202 ', be arranged on side, secondary wash tower 2 top and with tower wall 22 perpendicular of secondary scrubber 2, second spray column inlet duct 202 ' is comprised the second spray column entrance 204 ', the second spray column inlet duct 202 ' extended outside secondary wash tower 2 tower wall 22 further and is connected with the second mixed aerosol device 80 ' by pipeline;

4.5.2) the second spray column 206 ', it is connected with the approximate center perpendicular of the second spray column inlet duct 202 ' at secondary wash tower 2, and is evenly distributed with multiple second spray holes 208 ' in the surrounding of the second spray column 206 '; And

4.5.3) the second helical tray main body 102 ', the inner side of the second helical tray main body 102 ' is by setting of spiraling in the initial lateral around the second spray column 206 ' of its lower edge 104 ', engage with the inwall 22 of secondary wash tower 2 outside it, and the second spray column 206 ' extends downward beyond the lower end of the second helical tray main body 102 ', and extend downward beyond on the sidewall of the second helical tray main body lower end and bottom surface, lower end at the second spray column 206 ' and be provided with multiple second spray holes 208 '.

In one more preferably embodiment, the circumferential spiral tower tray 10 ' of secondary wash tower 2 of the present invention, comprises further:

Liquid phase distributor 30, is arranged around the second spray column 206 ' in the below of the second helical tray main body 102 ', and liquid phase distributor 30 is provided with certain intervals with the inwall 22 of scrubber 2; And

Circumferentially combine bubble cap plate 50, to be arranged on below liquid phase distributor 30 and around the second spray column 206 ';

Wherein, spray column 206 ' extends downwardly through liquid phase distributor 30 and central part one segment distance circumferentially combining bubble cap plate 50, and spray holes is not set at liquid phase distributor 30 and the second spray column 206 ' circumferentially combined between bubble cap plate 50, and the second spray column 206 ' extends downwardly through the side of the one section of spray column circumferentially combining bubble cap plate 50 central part and bottom surface, lower end is all evenly provided with multiple second spray holes 208 '.

In one more preferably embodiment, wherein liquid phase distributor 30 comprises further:

Annular liquid phase distribution plate 302, is arranged around the second spray column 206 ', is the annular groove in one fixed width;

Multiple intake chute 304, is evenly arranged on the outside of annular liquid phase distribution plate 302, its sidewall and vertical wall 305 higher than the sidewall of annular liquid phase distribution plate 302 and vertical wall 308 and with annular liquid phase distribution plate 302 fluid connection; And

Multiple cloth liquid mouth 306, is arranged at each one end away from annular liquid phase distribution plate 302 of multiple intake chute 304 respectively, and with scrubber 1, the inwall 12 of 2, has certain interval between 22.

In one more preferably embodiment, wherein multiple intake chute 304 is set to four, six or eight respectively with multiple cloth liquid mouth 306, and multiple cloth liquid mouth 306 is set to tubaeform, has flange 307.

In one more preferably embodiment, wherein circumferentially combine bubble cap plate 50 and comprise further:

Fall liquid passage 502, arrange around spray column 206, and and between the second spray column 206 ', there is gap;

Multiple round bubble-cap 504, is evenly arranged on the periphery falling liquid passage 502; And

At least two-layer arc bubble-cap 506, is arranged around multiple round bubble-cap 504, and every one deck of at least two-layer arc bubble-cap 506 is the annular that uniform intervals is opened, and the arc bubble-cap 506 of the adjacent layer of at least two-layer arc bubble-cap 506 is crisscross arranged;

Wherein, be provided with air rising hole 508 in multiple round bubble-cap 504 and at least two-layer arc bubble-cap 506, and the bubble-cap of at least two-layer arc bubble-cap 506 is evenly provided with multiple steam vent 510.

In one more preferably embodiment, wherein at least two-layer arc bubble-cap 506 is three layers of arc bubble-cap 506, and the arc bubble-cap of every one deck of at least two-layer arc bubble-cap 506 is four, six or eight, correspondingly, stagger between the adjacent two layers arc bubble-cap 506 of at least two-layer arc bubble-cap 506 about 45 °, 30 ° or 22.5 ° respectively.Certainly, the arc bubble-cap of every one deck also evenly can be set to the arc bubble-cap of other numbers as required, also interleavedly respectively between adjacent two-layer arc bubble-cap arranges.

In one more preferably embodiment, wherein each correspondence of multiple cloth liquid mouth 306 is arranged on each section of the outermost layer arc bubble-cap of at least two-layer arc bubble-cap 506 circumferentially combining bubble cap plate 50 roughly directly over centre position.Such washings to fall behind the outer of arc bubble-cap can along arc bubble-cap both sides towards two sections of arc bubble-caps between interval flowing, the centre position of washings one deck arc bubble-cap under being flowed to by the interval between two sections of arc bubble-caps afterwards, thus extend the flow process of washings.

In one more preferably embodiment, the system 1000 of gas purification of the present invention, wherein the second mixed aerosol device 80 ' comprises further:

Pipe section 801 and gas-liquid premix section 802,

Second cylindrical shell 806 is liquid channel, first cylindrical shell 804 arrange with concentric and the second cylindrical shell 806 extended into and disconnecting form annular (or taper type) opening 814 the side 812 being similar to frustum together be defined as gas phase channel, gas phase channel is provided with gas phase entrance 820

Supersonic generator 818, is symmetricly set on and is positioned on the first cylindrical shell 804 of premix section 802 outside.

In one more preferably embodiment, wherein the second mixed aerosol device 80 ' is provided with flange on gas phase entrance 820, the porch of the second cylindrical shell 806 is provided with flange, the outlet of the first end wall 808 center of the first cylindrical shell 804 is provided with flange, and symmetrically arranged supersonic generator 818 is two, three, four, six or eight.

In one more preferably embodiment, wherein 818 upstreams of gas phase entrance of the gas phase channel entering the second mixed aerosol device 80 ' are provided with the second pressure-regulating valve 822 ', the downstream of the outlet 810 of the first end wall 808 is provided with the second pressure transmitter 824 ', the upstream line entering liquid channel is provided with the 3rd flow control valve and the 3rd flow transmitter, the downstream of the grey water pipeline of the atomization of the outlet leaving the second mixed aerosol device is provided with the 4th flow control valve and the 4th flow transmitter.

In a preferred embodiment, cleaning system 1000 of the present invention, wherein secondary wash tower 2 comprises further: for the gas distributor 60 of secondary wash tower 2, it comprises:

1) gas buffer room 240, be arranged on the bottom section of secondary wash tower 2, it is made up of the bottom sidewall 22 of the bottom 282 of the water-bath 280 be connected with the sidewall 22 of secondary wash tower 2 and its upper Heisui River discharge pipe 242 of arranging and secondary wash tower 2 and lower wall 22 ';

2) first dedusting gas entry pipe 26, runs through the sidewall 22 of secondary wash tower 2 and in horizontal " L " type, its gas entry 262 is arranged on outside the sidewall 22 of secondary wash tower 2, and its gas exit 264 is arranged on gas buffer room 240, and inner also Open Side Down;

3) gas distribution member 620, it comprises further:

I) at least two annular gas distributed pipelines 622,623,624 arranged roughly with one heart;

Ii) at least the first connecting bridge 640 and the second connecting bridge 660, be arranged at least two annular gas distributed pipelines 622 in gas distribution member 620,623, between 624, at least the first connecting bridge 640 and the second connecting bridge 660 inside are hollow, and gas between at least two annular gas distributed pipelines is communicated with; And

Iii) at least one wireway 284, it to be arranged in water-bath 280 and to be communicated with the gas in the first connecting bridge 640 cavity, makes to be communicated with gas distribution member 620 gas;

Wherein, at least two annular gas distributed pipelines 622 in gas distribution member 620,623,624 are provided with multiple straight hole 628 at it with at least the first connecting bridge 640 and the second connecting bridge 660 on the direction bottom water-bath 280,642,662, and at least two annular gas distributed pipelines 622 in gas distribution member 620,623,624 are provided with multiple tangential hole 626 with multiple straight hole 628 interleaved at it on the direction bottom water-bath 280, and the opening of multiple tangential hole 626 is set to tilt laterally down.

Gas distributor 60 of the present invention, wherein the first connecting bridge 640 and the second connecting bridge 660 inside are hollow, make and at least two annular gas distributed pipelines 622, 623, between 624, gas is communicated with, from the water-gas of the multiple straight holes ejections arranged in its gas distribution member 620 and at least the first connecting bridge 640 and the second connecting bridge 660 from annular gas distributed pipeline 622, 623, 624 and the first neighbouring rising of connecting bridge 640 and the second connecting bridge 660, and from the structure that multiple tangential holes gas out that gas distribution member 620 is arranged tilts laterally due to tangential hole, make from the gas of tangential hole ejection to away from annular gas distributed pipeline 622, 623, the direction ejection of 624, like this, water-gas is made to obtain uniform distribution as far as possible in whole water-bath 280, reduce the possibility again accumulating air pocket to a certain extent simultaneously.

In a preferred embodiment, gas distributor 60 comprises further:

4) gas distributor support member 680, it is arranged on gas distribution member 620, and gas distribution member 620 is connected on the inwall of coal gas essence scrubbing tower 2 sidewall 22.

In a preferred embodiment, wherein gas distribution member 620 is made up of the annular gas distributed pipeline that three are arranged roughly with one heart, and at least one wireway 284 is set to 2 wireways 284 and is symmetricly set on the pipeline of water-bath 280 and the first connecting bridge 640.

In a preferred embodiment, the bottom of wherein water-bath 280 is set to taper, and the Heisui River discharge pipe 242 that it is arranged is positioned at the central part bottom water-bath 280.

In a preferred embodiment, wherein at least two annular gas distributed pipelines 622,623, the diameter of the multiple straight holes 628 arranged on 624 is 5-80mm, and the length of side of multiple tangential hole 626 is 5-80mm.More preferably, the diameter of multiple straight holes 628 that at least two annular gas distributed pipelines are arranged is 5-50mm, and the length of side of multiple tangential hole 626 is 5-50mm.Further preferably, the diameter of multiple straight holes 628 that at least two annular gas distributed pipelines are arranged is 10-30mm, and the length of side of multiple tangential hole 626 is 10-30mm.

In a preferred embodiment, this annular gas distributed pipeline can be vertical cross-section is round pipeline, and its diameter is 30 ~ 300mm.Wherein the diameter of at least two annular gas distributed pipelines 622,623,624 can be identical, also can be different.

In another preferred embodiment, this annular gas distributed pipeline also can be a hollow cylindrical structure, its for horizontal cross-section be annular, vertical cross-section is the form of rectangle or foursquare hollow circuit cylinder, in it, the difference of outer radius is 30 ~ 300mm, height is 100 ~ 1000mm, and concrete size can be determined according to actual conditions and load and coal gas amount.Wherein the difference of the interior outer radius of at least two annular gas distributed pipelines 622,623,624 can be identical with height, also can be different.

In a preferred embodiment, wherein gas distributor support member 680 is symmetricly set on the outer wall of gas distribution member 620 on the bearing of trend of the first connecting bridge 640.

In another embodiment of the present invention, provide a kind of system 1000 for gas purification, comprise: elementary scrubbing tower 1 and secondary wash tower 2, wherein be provided with the lower end of the first helical tray main body 102 in elementary scrubbing tower 1 by the elementary scrubbing tower circumferential spiral tower tray 10 of the lower end closed of the first spray column 206 and at least one deck spray thrower 13 be positioned at below elementary scrubbing tower circumferential spiral tower tray, wherein at least one deck spray thrower 13 is symmetrically arranged with multiple spray thrower, and in secondary wash tower 2, be provided with the lower end that gas distributor 60 described above and the second spray column 206 ' extend downward beyond the second helical tray main body 102 ', and on the second spray column side extending downward beyond the second helical tray main body 102 ' lower end and bottom surface, lower end, be all evenly provided with the secondary wash tower circumferential spiral tower tray 10 ' of multiple second spray holes 208 '.

In a preferred embodiment, the below layering of the first helical tray main body 102 that elementary scrubbing tower 1 inside is arranged arranges two-layer buck atomized liquid spray thrower 13, every layer can be distributed with four, six, eight spray throwers symmetrically, buck atomized drop is sprayed from each spray thrower, humidification dedusting is carried out to coal gas.

In one more preferably embodiment, secondary wash tower 2 is provided with the solid valve tower tray 225 of multilayer in the top of the second spray column inlet duct 202 '.

In one more preferably embodiment, secondary wash tower 2 is also provided with Combined defoamer 29 above the solid valve tower tray 225 of multilayer, and wherein Combined defoamer 290 is made up of concave flow-guiding type screen foam remover 292 and plate-fin entrainment separator 294.

In another detailed description of the invention, provide a kind of gas purifying method, the system 1000 of its gas purification adopting the present invention described above, the method comprises:

1) from coal gas secondary wash tower buck and/or enter the first mixed aerosol device 80 atomization from the compressed dustless clean gas of rear system and become atomization buck droplet;

2) the buck droplet through atomization tangentially enters primary cyclone 7 with the raw gas after Quench with from the buck of coal gas secondary wash tower respectively by one cyclonic atomization grey water inlet 710, one cyclonic raw gas entrance 702 and one cyclonic washing water inlet 708 respectively;

3) spin in cyclone separator after the buck droplet that the most bulky grain lime-ash in raw gas and part coal ash grit are atomized is moistening motion process in constantly reunite after or sedimentation fall and be separated, or be thrown toward the cyclone separator inwall buck lower immediately by spiral and sweep away and be arranged on primary cyclone 7 and enter in the Heisui River in the dirt discharge groove of primary cyclone 7 bottom formation close to the bottom ash port 714 of the spaced walls 712 in the internal side wall at middle part;

4) the one cyclonic Heisui River outlet 706 that the base wall of the Heisui River in dirt discharge groove by primary cyclone 7 is arranged enters black water treatment system;

5) part enters the elementary scrubbing tower gas entry pipeline 16 of the elementary scrubbing tower of coal gas 1 through the one cyclonic gas exit 704 that the buck droplet of atomization and the lime-ash of coal ash grit and only a few are arranged by primary cyclone 7 top with one cyclonic dedusting coal gas under the carrying secretly of coal gas;

Wherein, buck from secondary wash tower controls flow by first flow control valve 834, the dustless clean gas of compression from rear system controls the pressure of atomization buck by the first pressure-regulating valve 822, and the second adjustable valve 838 that the buck through being atomized simultaneously entering one cyclonic atomization grey water inlet 710 is arranged by atomization buck line downstream controls flow.

In a preferred embodiment, gas purifying method of the present invention comprises further:

6) the one cyclonic dedusting coal gas entering the elementary scrubbing tower gas entry pipeline 16 of elementary scrubbing tower 1 is upwards overflowed by the loose gas net 15 (wherein loose gas net 15 outside engages with the inwall 12 of elementary scrubbing tower) arranged above the outlet of the elementary scrubbing tower gas entry pipeline 16 of elementary scrubbing tower 1, air pocket is made to be divided into some cat-eyes or less bubble, coal gas and chilled water contact area are increased, thus washes out more solid particle in coal gas;

7) washings of secondary cyclone 9 from secondary cyclone gray water outlet 906 out, and enter elementary scrubbing tower grey water inlet 14, the coal gas that subtend is overflowed carries out further spraying and dedusting;

8) at least the symmetrically arranged multiple spray thrower of one deck spray thrower 13 carries out further spraying and dedusting to the coal gas continuing upwards to overflow;

9) coal gas continues upwards to be spun up along the first helical tray main body panel by the lower edge 104 of the first helical tray main body 102 of elementary scrubbing tower circumferential spiral tower tray 10, washings with antisludging agent enter through by the first spray column inlet duct 202 multiple first spray holes 208 that first spray column 206 sidewall is arranged and spray, and carry out spraying and dedusting to coal gas; And

10) coal gas after elementary spraying and dedusting is discharged by the elementary scrubbing tower gas exit 110 being arranged on elementary scrubbing tower 1 top, the bottom of elementary scrubbing tower 1 is set at the bottom of conical tower, solid particle all falls to this, and is discharged by the elementary scrubbing tower Heisui River outlet 18 that bottom is arranged.

In one more preferably embodiment, gas purifying method of the present invention comprises further:

11) coal gas after elementary spraying and dedusting of discharging through elementary scrubbing tower gas exit 110 enters the secondary rotary air gas entrance 902 in the upper portion side wall being tangentially arranged on secondary cyclone 9, washings enter by being arranged on the tangential secondary whirlwind washing water inlet 908 arranged above secondary rotary air gas entrance 902 in an opposite direction, the washings of tangential ejection carry out spray washing to coal gas, export 904 through first dedusting coal gas by the secondary rotary air gas being arranged on secondary cyclone 9 top and discharge the first dedusting gas entry pipe 26 entering secondary wash tower bottom, washings after spray washing discharge by the secondary cyclone gray water outlet 906 be arranged on bottom secondary cyclone 9 the elementary scrubbing tower grey water inlet 14 entering elementary scrubbing tower 1.

In a further preferred embodiment, gas purifying method of the present invention comprises further:

12) coal gas after elementary spraying and dedusting of being discharged by the elementary scrubbing tower gas exit 110 being arranged on elementary scrubbing tower 1 top or alternatively by the secondary rotary air gas being arranged on secondary cyclone 9 top export 904 discharge through first dedusting coal gas, enter the first dedusting gas entry pipe 26 bottom secondary wash tower 2, this coal gas enters gas distributor the first connecting bridge 640 by least one wireway 284 be arranged on the gas distributor 60 above first dedusting gas entry pipe in water-bath 280 with by least two annular gas distributed pipelines 622,623,624 gas distribution member 620 formed, and from the annular gas distributed pipeline 622 of at least two gas distribution member, 623, the 624 multiple straight holes 628 arranged on the direction bottom water-bath at it with at least the first connecting bridge 640 and the second connecting bridge 660,642,662 and gas distribution member in the multiple tangential holes 626 tilted laterally down that arrange with multiple straight hole 628 interleaved on the direction bottom water-bath 280 at it of at least two annular gas distributed pipelines spray, continue upwards to overflow washings liquid level 250,

13) coal gas overflowing washings liquid level 250 upwards contacts dedusting through at least two-layer tower tray 265 with the high pressure buck entered by high pressure grey water inlet 270; And

14) coal gas continues upwards to spiral upwards by the lower edge 104 ' of the second helical tray main body 102 ' of secondary wash tower circumferential spiral tower tray 10 ' along the second helical tray main body 102 ', washings with antisludging agent enter through by the second spray column inlet duct 202 ' multiple second spray holes 208 ' that the second spray column 206 ' sidewall is arranged and spray, carry out spraying and dedusting to coal gas, the dustless clean gas after dedusting is discharged by the dustless gas exit 210 arranged at secondary wash tower 2 top;

Wherein, the bottom of the water-bath 280 arranged bottom secondary wash tower 2 is taper, and the Heisui River discharge pipe 242 that the coal ash dust in washings is arranged by its portion of bottom centre is discharged.

Gas purifying method of the present invention, can in step 10) directly carry out step 12 afterwards) (see Fig. 3 c), or in step 10) after carry out step 11), and then carry out step 12) (see Fig. 3 b), depend on whether used gas cleaning system of the present invention comprises secondary cyclone.Certainly, even if gas cleaning system of the present invention comprises secondary cyclone, if by pipeline by its bypass, still can in step 10) directly carry out step 12 afterwards).

15) continue upwards to contact dedusting by valve tower tray 225 solid with the multilayer arranged between steam condensate entrance 232 in secondary wash tower circumferential spiral tower tray 10 ' top with steam condensate by the coal gas after the dedusting of secondary wash tower circumferential spiral tower tray 10 '; And

Coal gas continues upwards to remove with the Combined defoamer 290 above steam condensate entrance 232 the micro-foam wherein carried secretly by being arranged on the solid valve tower tray 225 of multilayer.

In one more preferably embodiment, gas purifying method of the present invention, the moisture dustless clean gas after dedusting of wherein being discharged by the dustless gas exit 210 arranged at secondary wash tower 2 top enters low temperature/conversion methanol wash column system process, and the pure synthesis gas obtained enters methanol-fueled CLC or F-T synthesis system is reacted; The liquid of the liquid channel of the first mixed aerosol device 80 and the second mixed aerosol device 80 ' is the water vapour conversion condensate liquid from low temperature/conversion methanol wash column system, from one cyclonic Heisui River outlet 706, elementary scrubbing tower Heisui River outlet 18 and secondary wash tower bottom arrange Heisui River discharge pipe 242 discharge Heisui River enter black water treatment system process, the buck obtained after black water treatment system process enters the high pressure grey water inlet 270 of secondary wash tower; The buck extracted out through the grey water-circulating pump 230 of secondary wash tower 2 enters:

1. the one cyclonic washing water inlet 708 of primary cyclone 7, and/or

Carry out step 11 behind the secondary whirlwind washing water inlet 908 (mode 1, as shown in Figure 3 b, in step 10) of 2. secondary cyclone 9), and then carry out step 12)), and/or

3. elementary scrubbing tower grey water inlet 14 (mode 2, as shown in Figure 3 c, in step 10) directly carry out step 12 afterwards)), and/or,

5. mixed aerosol device 80 is as atomization water, and/or

6. elementary scrubbing tower first spray column inlet duct 202 is as the shower water sprayed to circumferential spiral tower tray 10 side direction.

Wherein, the atomization buck after atomization divides two-way again, and a road enters the one cyclonic atomization grey water inlet 710 of primary cyclone 7, and another road enters the shower water that elementary scrubbing tower spray thrower 13 sprays as scrubbing tower side direction.

Referring to accompanying drawing, the primary cyclone for gas purification of the present invention and the system for gas purification and purification method thereof are specifically described.

As is shown in figs. la to ld, primary cyclone 7 of the present invention, comprising:

One cyclonic raw gas entrance 702, is tangentially arranged in primary cyclone 7 upper portion side wall;

One cyclonic atomization grey water inlet 710, is tangentially arranged in primary cyclone 7 upper portion side wall, and is positioned at the top of one cyclonic raw gas entrance 702;

One cyclonic washing water inlet 708, is tangentially arranged in primary cyclone 7 upper portion side wall, and is atomized grey water inlet 710 with one cyclonic and is arranged in the disk symmetric position of same level position;

One cyclonic atomization grey water inlet 710 is connected with the first mixed aerosol device 80 by pipeline.

See Fig. 2 a-2c, the first mixed aerosol device 80 and the second mixed aerosol device 80 ' comprise respectively:

Pipe section 801 and gas-liquid premix section 802,

Pipe section 801 is limited by the second cylindrical shell 806, gas-liquid premix section 802 is limited by the side 812 being similar to frustum arranged between the first cylindrical shell 804, first cylindrical shell 804 and the second cylindrical shell 806, the side 812 being wherein similar to frustum is at separated formation taper type (or annular) opening 814 of the first cylindrical shell 804 and the second cylindrical shell 806

Second cylindrical shell 806 is liquid channel, first cylindrical shell 804 arrange with concentric and the second cylindrical shell 806 extended into and disconnecting form taper type (or annular) opening 814 the side 812 being similar to frustum together be defined as gas phase channel, gas phase channel is provided with gas phase entrance 820.

Pipe section 801 and gas-liquid premix section 802 preferably share horizontally disposed first cylindrical shell 804, can avoid too much bend pipe like this.

Steam condensate or desalted water pipeline are connected on the liquid phase entrance of atomizing mixer in the mode of flange connect, compress dustless clean gas pipeline and are connected on the gas phase entrance of atomizing mixer in the mode of flange connect.Atomized liquid pipeline exports with blender atomized liquid and connects with flange method, the short as far as possible and few bend pipe of the connecting line between blender and just scrubbing tower sprayer or smart scrubbing tower spray column.

The first cylindrical shell 804 being positioned at premix section 802 outside is symmetrically arranged with supersonic generator 818.

First mixed aerosol device 80 and the second mixed aerosol device 80 ' are provided with flange respectively on gas phase entrance 820, the porch of the second cylindrical shell 806 is provided with flange, the outlet 810 of the first end wall 808 center of the first cylindrical shell 804 is provided with flange, and symmetrically arranged supersonic generator 818 is four.Certainly, symmetrically arranged supersonic generator 818 can be set to two, three, five, six or eight etc. as required.

Refer again to Fig. 1 d, the upstream of gas phase entrance 818 of the gas phase channel entering the first mixed aerosol device 80 is provided with the first pressure-regulating valve 822, the downstream of the outlet 810 of the first end wall 808 is provided with the first pressure transmitter 824, the upstream line entering liquid channel 806 is provided with first flow control valve 834 and first flow transmitter 836, the downstream of the grey water pipeline of the atomization of the outlet 810 leaving the first mixed aerosol device 80 is provided with second adjustable valve 838 and second transmitter 839.

The upstream line of the liquid channel 806 between liquid channel 806 entrance and first flow control valve 834 of the first mixed aerosol device 80 is also provided with the first antisludging agent pipeline 830, and is provided with control valve 832 thereon.

For steam condensate atomized liquid or desalted water atomized liquid, steam condensate or desalted water pipeline are connected on the liquid phase entrance of atomizing mixer in the mode of flange connect, and steam condensate or desalted water enter liquid channel thus, then enter spray chamber; Compressing dustless clean gas pipeline is connected on the gas phase entrance of atomizing mixer in the mode of flange connect, the dustless clean gas of compression from rear system enters gas phase channel thus, tangentially enter spray chamber by tangential slot Y nibs again, coal gas is atomized into drop oblique steam condensate or desalted water to be broken up of spray chamber; On spray chamber outer wall, symmetry is evenly equipped with four ultrasonic ultrasonic delay line memories, ultrasonic wave makes steam condensate or desalted water fall apart into less drop and thinner gas bag with the dustless clean gas of compression, becomes steam condensate or desalted water atomized liquid enters steam condensate or desalted water atomized liquid pipeline from outlet; Atomized liquid pipeline exports with blender atomized liquid and connects with flange method, the short as far as possible and few bend pipe of the connecting line between atomizing mixer and just scrubbing tower spray column or smart scrubbing tower spray column.Atomized liquid enters spray column and sprays.Relative to Venturi scrubber, this ultrasonic wave mixed aerosol device only needs a small amount of liquid just can produce thinner more intensive atomized liquid, has extraordinary water-saving result and better dustproof function for cleaning dust technique.

Wherein, the first spray column inlet duct 202 upstream is connected with the second antisludging agent pipeline 19 by pipeline, and the second antisludging agent pipeline 19 is provided with control valve 192.

See Fig. 3 b, the system 1000 for gas purification of the present invention, comprising:

1) primary cyclone of the present invention 7 described above; And

2) elementary scrubbing tower 1;

Wherein, elementary scrubbing tower 1 is provided with from top to bottom: elementary scrubbing tower gas exit 110, elementary scrubbing tower circumferential spiral tower tray 10, at least one deck spray thrower 13, elementary scrubbing tower gas entry pipeline 16 and elementary scrubbing tower Heisui River outlet 18; Elementary scrubbing tower gas exit 110 and elementary scrubbing tower Heisui River outlet 18 are separately positioned on top and the bottom of elementary scrubbing tower 1, elementary scrubbing tower circumferential spiral tower tray 10 is arranged at the top of elementary scrubbing tower 1, elementary scrubbing tower gas entry pipeline 16 is arranged at the bottom of elementary scrubbing tower 1, and one cyclonic gas exit 704 is connected to elementary scrubbing tower gas entry pipeline 16.

See Fig. 3 b and Fig. 4 b, elementary scrubbing tower circumferential spiral tower tray 10 comprises further:

At least one deck spray thrower 13 is two-layer spray thrower, and its every one deck is all symmetrically arranged with multiple spray thrower, as four or eight.

At least the upstream of one deck spray thrower 13 is connected with the first mixed aerosol device 80 by pipeline.

At least also be provided with elementary scrubbing tower grey water inlet 14 between one deck spray thrower 13 and elementary scrubbing tower gas entry pipeline 16, the washings of secondary cyclone 9 from secondary cyclone gray water outlet 906 out, enter just scrubber grey water inlet 14.

Above the outlet of elementary scrubbing tower gas entry pipeline 16, elementary scrubbing tower gas entry pipeline 16 is provided with loose gas net 15, wherein loose gas net 15 outside engages with the inwall 12 of elementary scrubbing tower, it is set to two-layer, can be made up of (see Fig. 8) netted stainless steel wire.The synthesis gas leaving down-comer carries a large amount of ashes, after two-layer loose gas net, air pocket is originally divided into some cat-eyes or less bubble, and synthesis gas and chilled water contact area are improved greatly, thus can wash out more solid particle in synthesis gas.

Be connected with the second antisludging agent pipeline 19 by pipeline in the first spray column inlet duct 202 upstream of elementary washing, the second antisludging agent pipeline 19 is provided with control valve 192.

See Fig. 3 c, the gas cleaning system 1000 of an embodiment of the invention, comprises 4 further) secondary wash tower 2, wherein, elementary scrubbing tower gas exit 110 is communicated with the first dedusting gas entry pipe 26 of secondary wash tower 2 by pipeline.See Fig. 3 b, the gas cleaning system 1000 of another embodiment of the invention, comprises further:

3) secondary cyclone 9, be provided with secondary rotary air gas entrance 902, secondary whirlwind washing water inlet 908, secondary rotary air gas outlet 904 and secondary cyclone gray water outlet 906, wherein secondary whirlwind washing water inlet 908 is arranged on secondary rotary air gas entrance 902 top, secondary rotary air gas entrance 902 and secondary whirlwind washing water inlet 908 are tangentially arranged in the upper portion side wall of secondary cyclone 9 respectively, and secondary rotary air gas outlet 904 and secondary cyclone gray water outlet 906 are separately positioned on top and the bottom of secondary cyclone 9; And

4) secondary wash tower 2;

Wherein elementary scrubbing tower gas exit 110 is communicated with the secondary rotary air gas entrance 902 of secondary cyclone 9 by pipeline, the secondary rotary air gas outlet 904 of secondary cyclone 9 is communicated with the first dedusting gas entry pipe 26 of secondary wash tower 2 by pipeline, and wherein elementary scrubbing tower gas exit 110 is not communicated with the first dedusting gas entry pipe 26 of secondary wash tower 2 by pipeline.As shown in Fig. 3 b-3c, the upstream line of the ash-water pipeline between the first spray column entrance 204 extended outside elementary scrubbing tower 1 tower wall 12 and flow control valve 194 is also provided with the second antisludging agent pipeline 19, is provided with control valve 192.

See Fig. 3 a-3c, secondary wash tower 2 comprises further:

4.1) gas buffer room 240, is arranged on bottom secondary wash tower 2;

4.7) dustless gas exit 210, is arranged on the top of secondary wash tower 2.

At least two-layer tower tray 265 is provided with further above the liquid level 250 of secondary wash tower 2 inside and between secondary wash tower circumferential spiral tower tray 10 '.

The solid valve tower tray 225 of multilayer is provided with further between secondary wash tower circumferential spiral tower tray 10 ' top and steam condensate entrance 232.

Above the solid valve tower tray 225 of the multilayer of secondary wash tower 2 with steam condensate entrance 232, be also provided with Combined defoamer 290, wherein Combined defoamer 290 is made up of concave flow-guiding type screen foam remover 292 and plate-fin entrainment separator 294.

See Fig. 3 a-3c, Fig. 4 a and 4c, wherein secondary wash tower circumferential spiral tower tray 10 ', comprises further:

See Fig. 4 c, the circumferential spiral tower tray 10 ' of secondary wash tower 2 of the present invention, comprises further:

See Fig. 5, wherein liquid phase distributor 30 comprises further:

Multiple cloth liquid mouth 306, is arranged at each one end away from annular liquid phase distribution plate 302 of multiple intake chute 304 respectively, and with the inwall 12 of secondary scrubber 2, between 22, there is certain interval.

Wherein multiple intake chute 304 can be set to four, six or eight with multiple cloth liquid mouth 306, and multiple intake chute 304 is identical with the number of multiple cloth liquid mouth 306, and multiple cloth liquid mouth 306 is set to tubaeform, has flange 307.

See Fig. 6 a-6b, wherein circumferentially combine bubble cap plate 50 and comprise further:

Fall liquid passage 502, arrange around the second spray column 206 ', and and between the second spray column 206 ', there is gap;

Wherein at least two-layer arc bubble-cap 506 is set to three layers of arc bubble-cap 506, and the arc bubble-cap of every one deck is four, six or eight, correspondingly, stagger between the adjacent two layers arc bubble-cap 506 of at least two-layer arc bubble-cap 506 about 45 °, 30 ° or 22.5 ° respectively.Certainly, the arc bubble-cap of every one deck also evenly can be set to the arc bubble-cap of other numbers as required, also interleavedly respectively between adjacent two-layer arc bubble-cap arranges.

Each correspondence of multiple cloth liquid mouth 306 is arranged on each section that secondary wash tower circumferentially combines the outermost layer arc bubble-cap of at least two-layer arc bubble-cap 506 of bubble cap plate 50 roughly directly over centre position.Such washings to fall behind the outer of arc bubble-cap can along arc bubble-cap both sides towards two sections of arc bubble-caps between interval flowing, the centre position of washings one deck arc bubble-cap under being flowed to by the interval between two sections of arc bubble-caps afterwards, thus extend the flow process of washings.

As shown in figs 3 a-3 c, the gas distributor 60 be arranged at bottom coal gas secondary wash tower (i.e. smart scrubbing tower) 2 comprises further: gas buffer room 240, first dedusting gas entry pipe 26, gas distribution member 620 and gas distributor support member 680.

Gas buffer room 240, is arranged on the bottom section of secondary wash tower 2, and it is made up of the bottom sidewall 22 of the bottom 282 of the water-bath 280 be connected with the sidewall 22 of secondary wash tower 2 and its upper Heisui River discharge pipe 242 of arranging and secondary wash tower 2 and lower wall 22 '.

First dedusting gas entry pipe 26, runs through the sidewall 22 of secondary wash tower 2 and in horizontal " L " type, its gas entry 262 is arranged on outside the sidewall 22 of secondary wash tower 2, and its gas exit 264 is arranged on inside, gas buffer room 240 and Open Side Down.

See Fig. 7 a and 7b, gas distribution member 620, comprises three annular gas distributed pipelines 622,623,624 arranged roughly with one heart; First connecting bridge 640 and the second connecting bridge 660; And wireway 284.Certainly, annular gas distributed pipeline 622,623,624 also can be the annular gas distributed pipeline of other shapes arranged roughly with one heart, as square, oval etc.Three annular gas distributed pipelines 622,623,624 are vertical cross-sections is round pipeline, and its diameter is 30 ~ 300mm.Its diameter can be arranged as required, can be identical, also can be different.

Certainly, gas distribution member 620 also can according to the size of scrubbing tower and coal gas treating capacity by two or more, as three, four, five annular gas distributed pipeline 622,623,624 formations such as grade arranged roughly with one heart.

First connecting bridge 640 and the second connecting bridge 660, its inside is cavity, with 622,623,624 gases are communicated with, and are arranged on three annular gas distributed pipelines 622 in gas distribution member 620,623, between 624, gas between three annular gas distributed pipelines is communicated with.

See Fig. 3 a-3c, two wireways 284, are arranged in water-bath 280 and symmetry is connected to the first connecting bridge 640, be communicated with, make to be communicated with gas distribution member 620 gas with the gas in the first connecting bridge 640 cavity.

Three annular gas distributed pipeline 622,623,624 and the first connecting bridges 640 in gas distribution member 620 and the second connecting bridge 660 are provided with multiple straight hole 628,642,662 at it on the direction bottom water-bath 280.

Three annular gas distributed pipelines 622 in gas distribution member 620,623,624 are also provided with multiple tangential hole 626 with multiple straight hole 628 interleaved at it on the direction bottom water-bath 280, and the opening of multiple tangential hole 626 is set to tilt laterally down.

Gas distributor support member 680, is symmetricly set on the bearing of trend of gas distribution member 620, and gas distribution member 620 symmetry is connected on the inwall of coal gas essence scrubbing tower 2 sidewall 22.

The bottom of water-bath 280 is set to taper, and the Heisui River discharge pipe 242 that it is arranged is positioned at the central part bottom water-bath 280.Three annular gas distributed pipelines 622,623, the diameter of the multiple straight holes 628 arranged on 624 is 5-80mm, and the length of side of multiple tangential hole 626 is 5-80mm.More preferably, the diameter of multiple straight holes 628 that at least two annular gas distributed pipelines are arranged is 5-50mm, and the length of side of multiple tangential hole 626 is 5-50mm.Further preferably, the diameter of multiple straight holes 628 that at least two annular gas distributed pipelines are arranged is 10-30mm, and the length of side of multiple tangential hole 626 is 10-30mm.The length of side of multiple straight hole and multiple tangential hole can be determined according to the size of the coal gas amount of process.

The pipeline of three annular gas distributed pipelines to be vertical cross-section be circle, its diameter is 30 ~ 300mm.Wherein the diameter of three annular gas distributed pipelines 622,623,624 can be identical, also can be different.

Certainly, the form that three annular gas distributed pipelines also can be horizontal cross-sections is annular, vertical cross-section is rectangle or foursquare hollow circuit cylinder, in it, the difference of outer radius is 30 ~ 300mm, and height is 100 ~ 1000mm, and its concrete size can be determined according to actual conditions and load and coal gas amount.Wherein the difference of the interior outer radius of three annular gas distributed pipelines 622,623,624 can be identical with height, also can be different.

From the water-gas of the multiple straight holes ejections arranged in its gas distribution member 620 and the first connecting bridge 640 and the second connecting bridge 660 from annular gas distributed pipeline 622,623,624 and the first neighbouring rising of connecting bridge 640 and the second connecting bridge 660, and from the structure that the gas that multiple tangential holes that gas distribution member 620 is arranged spray tilts laterally due to tangential hole, make from the gas of tangential hole ejection to away from annular gas distributed pipeline 622, the direction ejection of 623,624.Like this, make water-gas obtain uniform distribution as far as possible in whole water-bath 280, reduce the possibility again accumulating air pocket to a certain extent simultaneously.

Coal gas is left by the top exit 904 of secondary cyclone 9 and enters by the gas exit 264 of the first dedusting gas entry pipe 26 of secondary wash tower the gas buffer room 240 arranged bottom smart scrubbing tower 2, then coal gas rises, enter gas distribution member 620 via wireway 284, carry out the preliminary distribution of gas.

Then, coal gas is at the annular gas distributed pipeline 622 by the setting roughly with one heart in gas distribution member 620,623, the multiple downward opening straight hole 628 evenly arranged on 624 and spraying with the outside tangential slot 626 down that is tilted to that multiple opening straight hole 628 is arranged alternately, also at it, direction bottom water-bath 280 is provided with multiple straight hole 642 from the first connecting bridge 640 and the second connecting bridge 660 simultaneously, 662 ejections, enter the water-bath room 280 of smart scrubbing tower 2, then upwards enter the top of secondary wash tower 2 again.

Result in blockage after preventing parking, straight hole 628 and tangential slot 626 opening are all set to perforate down.

Because straight hole 628, 642, 662 coal gas gushed out just rise by annular gas distributor gear 620, at two adjacent annular gas distributed pipelines 622, 623, between 624 or smart scrubbing tower 2 inwall 22 from away from straight hole place rise coal gas few, and coal gas to be tilted to after the tangential slot 626 down of outside the annular gas distributed pipeline 622 adjacent towards two to outside by opening, 623, between 624 or inwall 22 place of secondary wash tower 2 sprays, reach and make the equally distributed object of coal gas, in such coal gas and secondary wash tower 2, the washings of water-bath 280 produce larger contact area, thus obtain better dust removing effects, namely these intensive uniform straight holes and tangential slot make the large agglomerating coal gas of stock originally be divided into much uniform thin stock coal gas in a water bath, add dedusting area, improve the efficiency of water bath dust-removing.

Also spray laterally because coal gas is tilted to outside tangential slot 626 rear-inclined down by opening, for the high pressure gas that pressurized-gasification furnace produces, the washings that will promote water-bath 280 in secondary wash tower 2 are spinned motion, and the washings of water-bath promote coal gas eddy flow conversely in secondary wash tower in motion, promote coal gas evenly distribution, and due to the lengthening of gas paths, make more water mass transfer with it, thus obtain better water bath dust-removing effect.

As shown in figs 3 a-3 c, from bottom to top, after coal gas leaves gas distributor 60, rise and pass liquid level 250, be weaving through again two-layer tower tray 265 with from high pressure buck 270 counter current contacting dedusting after the purification of black water treatment system, then pass the spraying area 276 of a steam condensate atomized liquid or desalted water atomized liquid, then enter secondary wash tower and circumferentially combine bubble cap plate 50.

As shown in figures 6 a and 6b, coal gas from circumferentially combining the narrow air rising hole 508 of bubble cap plate 50 to rising, portion of washing water from narrow air rising hole 508 toward decline, both close contacts, adverse current dedusting.

Then coal gas is through the space liquid phase distributor 30 and the tower wall 22 of secondary wash tower 2.As shown in Fig. 3 a-3b, Fig. 4 a and 4c, coal gas is then along the second helical tray main body 102 ' of the second spray column 206 ' to rising, steam condensate atomized liquid or desalted water atomized liquid spray from the second spray column 206 ', steam condensate or desalted water flow down with coal gas in opposite directions along the second helical tray main body 102 ' simultaneously, thus the mist carried secretly in removing coal gas and grit group.

Refer again to accompanying drawing 3a-3b, Fig. 4 c, Fig. 5 and Fig. 6 a-6b, dropped to the periphery of circumferentially combining on bubble cap plate 50 by the washings that four tubaeform cloth liquid mouths 306 are discharged by intake chute 302, arc bubble-cap 506 is outer shellring shape, leaves space and stagger 45 ° between every adjacent two layers arc bubble-cap; Also interval is had between two adjacent arc bubble-caps in same layer.Such washings are circuitous flow between arc bubble-cap, makes its flow process elongated, the time of staying of washings on this tower tray and soak time is lengthened, thus makes can absorb more impurity in coal gas with the liquid of small amount.

In order to washings can be made to flow to decline liquid passage 502 more equably, circumferentially combine bubble cap plate 50 internal layer and be set to round bubble-cap 504.Washings from fall liquid passage 502 flow down time, run into steam condensate atomized liquid or the desalted water atomized liquid of ejection, washings are dispelled to be fallen, there is portion of washing water to be fallen by the air rising hole 508 in bubble-cap simultaneously, coal gas is upwards overflowed by multiple steam vents 510 that arc bubble-cap 504 is evenly arranged, such steam condensate atomized liquid or desalted water atomized liquid wash coal gas with the cleaning solution be scattered simultaneously, the grit condensed is fallen very soon, reduce the dust content of gas entering upper strata tower tray, and now dust content of gas is very low, therefore the situation not having gas dust blocking bubble-cap occurs.

Coal gas continue again to rise through four layers of tower tray 225 and with steam condensate or desalted water counter current contacting, thus the mist carried secretly in removing coal gas further.Then, the Combined defoamer 290 of coal gas through being made up of concave flow-guiding type screen foam remover 292 and plate-fin entrainment separator 294, further removing mist, can obtain the low-down dustless coal gas of dustiness, dustless coal gas is system after gas exit 210 discharge of secondary wash tower enters.

Refer again to Fig. 1 a-1d, Fig. 2 a-2c and Fig. 3 a-3c, gas purifying method of the present invention, adopt the system 1000 of gas purification described above, the method comprises:

1) from coal gas secondary wash tower buck with enter the first mixed aerosol device 80 from the compressed dustless clean gas of rear system and be atomized to become and be atomized buck droplet;

3) spin in cyclone separator after the buck droplet that the most bulky grain lime-ash in raw gas and part coal ash grit are atomized is moistening motion process in constantly reunite after or sedimentation fall and be separated, or be thrown toward the cyclone separator inwall buck lower immediately by spiral and sweep away and be arranged on primary cyclone 7 enters primary cyclone 7 bottom formation dirt discharge groove close to the bottom ash port 714 of the spaced walls 712 in the internal side wall at middle part;

With reference to Fig. 3 b, gas purifying method of the present invention comprises further:

With reference to Fig. 3 b-3c, gas purifying method of the present invention, comprises further:

12) coal gas (with reference to Fig. 3 c) after elementary spraying and dedusting that the elementary scrubbing tower gas exit 110 by being arranged on elementary scrubbing tower 1 top is discharged, or by the secondary rotary air gas being arranged on secondary cyclone 9 top export 904 discharge enter first dedusting gas entry pipe 26 bottom secondary wash tower 2 through first dedusting coal gas (with reference to Fig. 3 b), this coal gas enters gas distributor the first connecting bridge 640 by least one wireway 284 be arranged on the gas distributor 60 above first dedusting gas entry pipe in water-bath 280 with by least two annular gas distributed pipelines 622,623,624 gas distribution member 620 formed, and from the annular gas distributed pipeline 622 of at least two gas distribution member, 623, the 624 multiple straight holes 628 arranged on the direction bottom water-bath at it with at least the first connecting bridge 640 and the second connecting bridge 660,642,662 and gas distribution member in the multiple tangential holes 626 tilted laterally down that arrange with multiple straight hole 628 interleaved on the direction bottom water-bath 280 at it of at least two annular gas distributed pipelines spray, continue upwards to overflow washings liquid level 250,

Through above a series of washing, remove the trickle grit in the just very low coal gas of original dustiness, make the dustiness of coal gas be reduced to low-down level, Combined defoamer 290 stopping state will reduce greatly.

See Fig. 9, gas purifying method of the present invention, the moisture dustless clean gas after dedusting of wherein being discharged by the dustless gas exit 210 arranged at secondary wash tower 2 top enters low temperature/conversion methanol wash column system process, and the pure synthesis gas obtained enters methanol-fueled CLC or F-T synthesis system is reacted; The liquid of the liquid channel of the first mixed aerosol device 80 and the second mixed aerosol device 80 ' is the water vapour conversion condensate liquid from low temperature/conversion methanol wash column system, from one cyclonic Heisui River outlet 706, elementary scrubbing tower Heisui River outlet 18 and secondary wash tower bottom arrange Heisui River discharge pipe 242 discharge Heisui River enter black water treatment system process, the buck obtained after black water treatment system process enters the high pressure grey water inlet 270 of secondary wash tower; The buck extracted out through the grey water-circulating pump 230 of secondary wash tower 2 enters:

1. the one cyclonic washing water inlet 708 of primary cyclone 7, and/or

5. mixed aerosol device 80 is as atomization water, and/or

Different from Chinese patent 200810018399.0, the cleaning solution of the upper strata tower tray 225 in the inventive method all with steam condensate or desalted water, for singly overlapping 6.5MPa, producing effective gas (CO+H ₂) be 106,000NM ³its consumption of the gasification furnace of/h is less, is approximately 5 ~ 60t/h, but but ensure that the quality of gas washing, prevents the high speed coal gas of low dust-laden from again carrying addle mist containing impurity secretly.Then coal gas is through the Combined defoamer 290 be made up of concave flow-guiding type screen foam remover 292 and plate-fin entrainment separator 294, removes mist further, can obtain the low-down dustless coal gas of dustiness.

As shown in Fig. 3 a-3b and Fig. 9, the top of secondary wash tower 2 is gas exit 210, and dustless clean gas goes to rear system (as systems such as methyl alcohol conversion, low-temperature rectisols) thus, secondary wash tower 2 is from up to down provided with plate-fin entrainment separator 292 and concave flow-guiding type screen foam remover 294, is next respectively arranged with tower side vapor condensate liquid or desalted water entrance 232, some layers valve tower tray 225 (coal gas is sailed against the current through such as four layers of tower tray 225 with steam condensate or desalted water, removed the mist carried secretly in coal gas), the second spray column 206 ' admittedly, steam condensate or desalted water first enter the second mixed aerosol device 80 and are atomized and become steam condensate atomized liquid or desalted water atomized liquid droplet with the dustless clean gas of compression from rear system, then enter the second spray column 206 ' and spray high density water smoke in the space of the second narrow tower tray 10 ', now coal gas continues along on the second helical tray main body 102 ' screw, the high density water smoke of ejection and coal gas are near normal motion, such steam condensate atomized liquid or desalted water atomized liquid droplet are once be sprayed onto trickle grit few in number, just can condense with the steam condensate atomized liquid of follow-up ejection or desalted water atomized liquid droplet or trickle grit at once, fall, swept away by the steam condensate under along helical tray spiral or desalted water subsequently, reach the effect of smart dedusting.

The entrance of the grey water-circulating pump 230 of secondary wash tower 2 is arranged on water-bath 280 top simultaneously again lower than liquid level 250, make to be in the buck few and cleaner compared with the solid particle on top fully to obtain and recycle, it is discharged current 232 and is divided into following several roads stream stock: as gone to the first spray colunm 206 of elementary scrubbing tower 1 as shower water, go to primary cyclone 7 as dedusting washings, go to the first mixed aerosol device 80 as atomization water (wherein the cleaner steam condensate of the second mixed aerosol device 80 ' is as atomized water), go to coal gasifier as chilled water and go to secondary cyclone 9 as dedusting washings.

Primary cyclone of the present invention and comprise the system for gas purification of primary cyclone of the present invention and gas purifying method has abandoned the Venturi scrubber causing easy blocking, easy to wear, easy fouling and pressure drop large, devise a kind of new technology comprising atomising device, cyclone separator, even gas distribution device and the new equipments such as spiral tower tray of spraying, object be to provide a kind of using water wisely, equipment manufacturing cost low, remove NH ₃, HCN, HCl, HCOOH and grey slag dust efficiency high, overcome that pressure drop existing for prior art is large, energy consumption is high, the problem such as easy blocking, trickle grit removal efficiency low and work period is short.Because ultrasonic spraying device only needs a small amount of water can spray a large amount of night fog for washing, greatly saved with water, and large water gaging all carries out Inner eycle, only needs a small amount of moisturizing, so this technique water-saving performance is good.Last dustiness can drop to 0.1mg/m ³below.

In another embodiment, the invention provides the application in a kind of purification of the coal gas produced at the pressurized gasification being raw material with coal, petroleum coke, living beings and/or flammable trade waste.

In yet, the invention provides the application in the purification of the coal gas that the system for gas purification that comprises primary cyclone of the present invention is produced at the pressurized gasification being raw material with coal, petroleum coke, living beings and/or flammable trade waste.

In an embodiment again, the invention provides the application in the purification of the coal gas that gas purifying method of the present invention is produced at the pressurized gasification being raw material with coal, petroleum coke, living beings and/or flammable trade waste.

Although various embodiment of the present invention is described within a context by detailed description of the invention, the present invention is not limited to this.Therefore, it is the restriction of the scope of the invention that above description should be used as, and scope of the present invention is limited by appended claim.It will be appreciated by those skilled in the art that and can make various change and change to the present invention when not deviating from spirit of the present invention, it all will fall within the scope of protection of the present invention.

Claims

1. the primary cyclone for gas purification (7), is characterized in that, comprising:

One cyclonic raw gas entrance (702), is arranged in described primary cyclone (7) upper portion side wall;

One cyclonic atomization grey water inlet (710), is arranged in described primary cyclone (7) upper portion side wall, and is positioned at the top of described one cyclonic raw gas entrance (702);

One cyclonic washing water inlet (708), be arranged in described primary cyclone (7) upper portion side wall, and be atomized grey water inlet (710) with described one cyclonic and be arranged in the disk symmetric position of same level position;

One cyclonic gas exit (704), is arranged on the top wall of described primary cyclone (7); And

One cyclonic Heisui River outlet (706), is arranged in the base wall of described primary cyclone (7);

Wherein, described one cyclonic atomization grey water inlet (710) is connected with the first mixed aerosol device (80) by pipeline; Described first mixed aerosol device (80) comprises further:

Pipe section (801) and gas-liquid premix section (802),

Wherein, described pipe section (801) and described gas-liquid premix section (802) share level or vertically disposed first cylindrical shell (804), with the second cylindrical shell (806) extending into the setting of described first cylindrical shell (804) inner concentric, and with described pipe section (801) away from the first end of described gas-liquid premix section (802) there is first end wall (808) of closed described first cylindrical shell (804), in the center of described first end wall (808), there is an outlet (810),

Described pipe section (801) is limited by described second cylindrical shell (806), described gas-liquid premix section (802) is limited by the first cylindrical shell (804), the side (812) being similar to frustum that arranges between the first cylindrical shell (804) and described second cylindrical shell (806), the wherein said side (812) being similar to frustum is the separated formation annular opening (814) of described first cylindrical shell (804) and described second cylindrical shell (806)

Described second cylindrical shell (806) is liquid channel, described first cylindrical shell (804) arrange with concentric and described second cylindrical shell (806) extended into and disconnect form described annular opening (814) the side (812) being similar to frustum together be defined as gas phase channel, described gas phase channel is provided with gas phase entrance (820).

2. primary cyclone according to claim 1 (7), comprise further and be arranged on described primary cyclone (7) close to the spaced walls (712) of the back taper internal side wall at middle part being provided with necking down, the bottom of described spaced walls (712) is set to ash port (714).

3. primary cyclone according to claim 2 (7), wherein said one cyclonic raw gas entrance (702) is tangentially arranged in described primary cyclone (7) upper portion side wall, and described one cyclonic washing water inlet (708) and described one cyclonic atomization grey water inlet (710) are tangentially arranged in the disk symmetric position of same level position in described primary cyclone (7) upper portion side wall.

4. primary cyclone according to claim 1 (7), wherein said first mixed aerosol device (80) is symmetrically arranged with supersonic generator (818) on described first cylindrical shell (804) being positioned at described premix section (802) outside.

5. primary cyclone according to claim 4 (7), wherein said first mixed aerosol device (80) is provided with flange on described gas phase entrance (820), the porch of described second cylindrical shell (806) is provided with flange, the outlet (810) of the first end wall (808) center of described first cylindrical shell (804) is provided with flange, and symmetrically arranged described supersonic generator (818) is two, three, four, six or eight.

6. primary cyclone according to claim 5 (7), wherein the upstream of gas phase entrance (820) of the described gas phase channel entering described first mixed aerosol device (80) is provided with the first pressure-regulating valve (822), the downstream of the outlet (810) of described first end wall (808) is provided with the first pressure transmitter (824), the upstream line entering described liquid channel (806) is provided with first flow control valve (834) and first flow transmitter (836), the downstream of the grey water pipeline of the atomization of the outlet (810) leaving described first mixed aerosol device (80) is provided with second adjustable valve (838) and second transmitter (839).

7. primary cyclone according to claim 6 (7), the upstream line of the liquid channel (806) wherein between described liquid channel (806) entrance and described first flow control valve (834) of described first mixed aerosol device (80) is also provided with the first antisludging agent pipeline (830), and is provided with control valve (832) thereon.

8. the system for gas purification (1000), is characterized in that, comprising:

1) primary cyclone (7) according to any one of claim 1-7; And

2) elementary scrubbing tower (1);

Wherein, described elementary scrubbing tower (1) is provided with from top to bottom: elementary scrubbing tower gas exit (110), elementary scrubbing tower circumferential spiral tower tray (10), at least one deck spray thrower (13), elementary scrubbing tower gas entry pipeline (16) and elementary scrubbing tower Heisui River outlet (18); Described elementary scrubbing tower gas exit (110) and elementary scrubbing tower Heisui River outlet (18) are separately positioned on top and the bottom of described elementary scrubbing tower (1), described elementary scrubbing tower circumferential spiral tower tray (10) is arranged at the top of described elementary scrubbing tower (1), described elementary scrubbing tower gas entry pipeline (16) is arranged at the bottom of described elementary scrubbing tower (1), and described one cyclonic gas exit (704) is connected to described elementary scrubbing tower gas entry pipeline (16);

Described elementary scrubbing tower circumferential spiral tower tray (10) comprises further:

I) the first spray column inlet duct (202), be arranged on described elementary scrubbing tower (1) side, top and with tower wall (12) perpendicular of described elementary scrubbing tower (1), described first spray column inlet duct (202) comprises the first spray column entrance (204) extending described elementary scrubbing tower (1) tower wall (12) outside further;

Ii) the first spray column (206), it is connected in the approximate center perpendicular of described elementary scrubbing tower (1) with described first spray column inlet duct (202), and is evenly distributed with multiple first spray holes (208) in the surrounding of described first spray column (206); And

Iii) the first helical tray main body (102), the inner side of described first helical tray main body (102) is by setting of spiraling in the initial lateral around described first spray column (206) of its lower edge (104), engage with the inwall (12) of described elementary scrubbing tower (1) outside it, and close the lower end of described first spray column (206).

9. the system for gas purification according to claim 8 (1000), wherein said at least one deck spray thrower (13) is symmetrically arranged with multiple spray thrower, and the upstream of described at least one deck spray thrower (13) is connected with the first mixed aerosol device (80) by pipeline.

10. the system for gas purification according to claim 8 (1000), is also provided with elementary scrubbing tower grey water inlet (14) between wherein said at least one deck spray thrower (13) and described elementary scrubbing tower gas entry pipeline (16).

11. systems for gas purification according to claim 8 (1000), wherein above the outlet of described elementary scrubbing tower gas entry pipeline (16), described elementary scrubbing tower gas entry pipeline (16) is provided with loose gas net (15), described loose gas net (15) outside engages with the inwall (12) of described elementary scrubbing tower, described first spray column inlet duct (202) upstream is connected with the second antisludging agent pipeline (19) by pipeline, and described second antisludging agent pipeline (19) is provided with control valve (192).

12. systems for gas purification according to claim 8 (1000), comprise further:

4) secondary wash tower (2), described secondary wash tower (2) comprises further:

4.1) gas buffer room (240), are arranged on described secondary wash tower (2) bottom;

4.2) first dedusting gas entry pipe (26), its sidewall (22) through described secondary wash tower (2) and extend in described gas buffer room (240);

4.3) gas distributor (60), be arranged on described just dedusting gas entry pipe (26) top, and comprising water-bath (280) and Heisui River discharge pipe (242), it is connected on the inwall of the sidewall (22) of described secondary wash tower (2) by gas distributor support member (680) disposed thereon;

4.4) secondary wash cobwebs and dirt under ceiling water out (23), be arranged on the sidewall (22) of the described secondary wash tower (2) of described gas distributor (60) top, and be positioned at liquid level (250) below of described secondary wash tower (2);

4.5) secondary wash tower circumferential spiral tower tray (10 '), is arranged on liquid level (250) top that described secondary wash tower (2) is inner;

4.6) steam condensate entrance (232), is arranged on the sidewall (22) of the described secondary wash tower (2) of described secondary wash tower circumferential spiral tower tray (10) top; And

4.7) dustless gas exit (210), is arranged on the top of described secondary wash tower (2);

Wherein, described elementary scrubbing tower gas exit (110) is communicated with the described just dedusting gas entry pipe (26) of described secondary wash tower (2) by pipeline.

13. systems for gas purification according to claim 8 (1000), comprise further:

The upstream of described secondary wash tower (2) comprises further:

3) secondary cyclone (9), be provided with secondary rotary air gas entrance (902), secondary whirlwind washing water inlet (908), the outlet of secondary rotary air gas (904) and secondary cyclone gray water outlet (906), wherein said secondary whirlwind washing water inlet (908) is arranged on described secondary rotary air gas entrance (902) top, described secondary rotary air gas entrance (902) and described secondary whirlwind washing water inlet (908) are tangentially arranged in the upper portion side wall of described secondary cyclone (9) respectively, described secondary rotary air gas outlet (904) and described secondary cyclone gray water outlet (906) are separately positioned on top and the bottom of described secondary cyclone (9),

Condition is, wherein said elementary scrubbing tower gas exit (110) is communicated with the described secondary rotary air gas entrance (902) of described secondary cyclone (9) by pipeline, and described secondary rotary air gas outlet (904) of described secondary cyclone (9) is communicated with the described just dedusting gas entry pipe (26) of described secondary wash tower (2) by pipeline.

14. systems for gas purification according to claim 12 (1000), are wherein provided with at least two-layer tower tray (265) further above the liquid level (250) that described secondary wash tower (2) is inner and between described secondary wash tower circumferential spiral tower tray (10 ').

15. systems for gas purification according to claim 12 (1000), are wherein provided with the solid valve tower tray (225) of multilayer further between described secondary wash tower circumferential spiral tower tray (10 ') top and described steam condensate entrance (232).

16. systems for gas purification according to claim 15 (1000), are wherein also provided with Combined defoamer (290) at the solid valve tower tray (225) of the described multilayer of described secondary wash tower (2) with the top of described steam condensate entrance (232).

17. systems for gas purification (1000) according to any one of claim 12 ~ 16, wherein said secondary wash tower circumferential spiral tower tray (10 '), comprises further:

4.5.1) the second spray column inlet duct (202 '), be arranged on described secondary wash tower (2) side, top and with sidewall (22) perpendicular of described secondary wash tower (2), described second spray column inlet duct (202 ') comprises the second spray column entrance (204 ') extending described secondary wash tower (2) sidewall (22) outside further, and described second spray column inlet duct (202 ') is connected with the second mixed aerosol device (80 ') by pipeline;

4.5.2) the second spray column (206 '), it is connected with the approximate center perpendicular of described second spray column inlet duct (202 ') described secondary wash tower (2), and is evenly distributed with multiple second spray holes (208 ') in the surrounding of described second spray column (206 '); And

4.5.3) the second helical tray main body (102 '), the inner side of described second helical tray main body (102 ') is by setting of spiraling in the initial lateral around described second spray column (206 ') of its lower edge (104 '), engage with the sidewall (22) of described secondary wash tower (2) outside it, and described second spray column (206 ') extends downward beyond the lower end of described second helical tray main body (102 '), and extend downward beyond on the sidewall of described second helical tray main body lower end and bottom surface, lower end at described second spray column (206 ') and be provided with multiple second spray holes (208 ').

18. systems for gas purification (1000) according to any one of claim 12 ~ 16, wherein, described secondary wash tower (2) comprising:

1) gas buffer room (240), be arranged on the bottom section of described secondary wash tower (2), it is made up of the bottom sidewall (22) of the bottom (282) of the water-bath (280) be connected with the sidewall (22) of described secondary wash tower (2) and Heisui River discharge pipe (242) that it is arranged and described secondary wash tower (2) and lower wall (22 ');

2) first dedusting gas entry pipe (26), run through described secondary wash tower (2) sidewall (22) and in horizontal " L " type, its gas entry (262) is arranged on outside the sidewall (22) of described secondary wash tower (2), and its gas exit (264) is arranged on described gas buffer room (240) inside and Open Side Down;

3) gas distributor (60), be arranged on the bottom of described secondary wash tower (2), described gas distributor (60) comprises gas distribution member (620) further, and it comprises further:

I) at least two annular gas distributed pipelines (622,623,624) arranged roughly with one heart;

Ii) at least the first connecting bridge (640) and the second connecting bridge (660), be arranged at least two described annular gas distributed pipelines (622 in described gas distribution member (620), 623,624) between, described at least the first connecting bridge (640) and the second connecting bridge (660) inside are hollow, and gas between at least two described annular gas distributed pipelines is communicated with;

Iii) at least one wireway (284), it to be arranged in described water-bath (280) and to be communicated with the gas in described first connecting bridge (640) cavity, makes to be communicated with described gas distribution member (620) gas; And

4) gas distributor support member (680), it is arranged on described gas distribution member (620), makes described gas distribution member (620) be connected on the inwall of the sidewall (22) of described secondary wash tower (2);

Wherein, at least two in described gas distribution member (620) described annular gas distributed pipelines (622, 623, 624) on its direction towards described water-bath (280) bottom, multiple straight hole (628 is provided with described at least the first connecting bridge (640) and the second connecting bridge (660), 642, 662), and at least two described annular gas distributed pipelines (622 in described gas distribution member (620), 623, 624) on its direction towards water-bath (280) bottom, described multiple straight hole (628) interleaved is provided with multiple tangential hole (626), the opening of described multiple tangential hole (626) is set to tilt laterally down.

19. systems for gas purification according to claim 18 (1000), the annular gas distributed pipeline (622 that wherein said gas distribution member (620) is arranged roughly with one heart by three, 623,624) form, described at least one wireway (284) is set to 2 wireways (284) and is symmetricly set on described water-bath (280) with on the pipeline of described first connecting bridge (640), and described annular gas distributed pipeline (622,623,624) be the ring-shaped cylinder structure of hollow.

20. systems for gas purification according to claim 19 (1000), the bottom of the described water-bath (280) of wherein said gas distributor (60) is set to taper, and described Heisui River discharge pipe (242) that it is arranged is positioned at the central part of described water-bath (280) bottom.

21. systems for gas purification according to claim 19 (1000), three described annular gas distributed pipelines (622 of wherein said gas distributor (60), 623,624) diameter of the upper described multiple straight hole (628) arranged is 5-80mm, and the length of side of described multiple tangential hole (626) is 5-80mm.

22. systems for gas purification according to claim 19 (1000), three described annular gas distributed pipelines (622 of wherein said gas distributor (60), 623, 624) pipeline of to be vertical cross-section be circle, described annular gas distributed pipeline diameter is 30 ~ 300mm, wherein three described annular gas distributed pipelines (622, 623, 624) each diameter in is identical or different, and wherein said gas distributor support member (680) is symmetricly set on the outer wall of described gas distribution member (620) on described first connecting bridge (640) bearing of trend.

23. systems for gas purification according to claim 19 (1000), three described annular gas distributed pipelines (622 of wherein said gas distributor (60), 623, 624) be a hollow cylindrical structure, its horizontal cross-section is annular, vertical cross-section is rectangle or foursquare pipeline, in it, the difference of outer radius is 30 ~ 300mm, height is 100 ~ 1000mm, wherein three described annular gas distributed pipelines (622, 623, 624) in each in, the difference of outer radius is identical or different, and wherein said gas distributor support member (680) is symmetricly set on the outer wall of described gas distribution member (620) on described first connecting bridge (640) bearing of trend.

24. systems for gas purification according to claim 17 (1000), wherein said second mixed aerosol device (80 ') comprises further:

Pipe section (801) and gas-liquid premix section (802),

Described pipe section (801) is limited by described second cylindrical shell (806), described gas-liquid premix section (802) is limited by the first cylindrical shell (804), the side (812) being similar to frustum that arranges between the first cylindrical shell (804) and described second cylindrical shell (806), the side (812) of wherein said frustum is the separated formation annular opening (814) of described first cylindrical shell (804) and described second cylindrical shell (806)

Described second cylindrical shell (806) is liquid channel, described first cylindrical shell (804) arrange with concentric and described second cylindrical shell (806) extended into and disconnect form described annular opening (814) the side (812) being similar to frustum together be defined as gas phase channel, described gas phase channel is provided with gas phase entrance (820)

Supersonic generator (818), is symmetricly set on and is positioned on outside described first cylindrical shell (804) of described premix section (802).

25. 1 kinds of gas purifying methods, adopt the system (1000) of the gas purification described in any one of claim 8-24,

In the primary cyclone (7) of the system (1000) of described gas purification, the upstream of gas phase entrance (820) of the described gas phase channel entering described first mixed aerosol device (80) is provided with the first pressure-regulating valve (822), the downstream of the outlet (810) of described first end wall (808) is provided with the first pressure transmitter (824), the upstream line entering described liquid channel (806) is provided with first flow control valve (834) and first flow transmitter (836), the downstream of the grey water pipeline of described atomization of the outlet (810) leaving described first mixed aerosol device (80) is provided with second adjustable valve (838) and second transmitter (839),

Described method comprises:

1) from coal gas secondary wash tower buck and/or enter the first mixed aerosol device (80) atomization from the compressed dustless clean gas of rear system and become atomization buck droplet;

2) the buck droplet through atomization is atomized grey water inlet (710) with the raw gas after Quench with from the buck of described coal gas secondary wash tower respectively by one cyclonic respectively, one cyclonic raw gas entrance (702) and one cyclonic washing water inlet (708) tangentially enter described primary cyclone (7);

3) the most bulky grain lime-ash in described raw gas and part coal ash grit are separated, and the described buck under immediately by spiral sweeps away and is arranged in Heisui River that described primary cyclone (7) enters close to the bottom ash port (714) of the spaced walls (712) in the internal side wall at middle part in the dirt discharge groove formed in described primary cyclone (7) bottom;

4) Heisui River in described dirt discharge groove enters black water treatment system by one cyclonic Heisui River outlet (706) that described primary cyclone (7) base wall is arranged;

5) part enters the elementary scrubbing tower gas entry pipeline (16) of the elementary scrubbing tower of coal gas (1) through the one cyclonic gas exit (704) that the buck droplet of atomization and the lime-ash of coal ash grit and only a few are arranged by primary cyclone (7) top with one cyclonic dedusting coal gas under the carrying secretly of coal gas;

Wherein, buck from described secondary wash tower controls flow by described first flow control valve (834), the dustless clean gas of compression from rear system controls the pressure of atomization buck by described first pressure-regulating valve (822), and the described second adjustable valve (838) that the buck through being atomized simultaneously entering described one cyclonic atomization grey water inlet (710) is arranged by described atomization buck line downstream controls flow.

26. gas purifying methods according to claim 25, when the system (1000) of described gas purification comprises loose gas net (15) and elementary scrubbing tower grey water inlet (14), described in described elementary scrubbing tower grey water inlet (14) is arranged at least between one deck spray thrower (13) and described elementary scrubbing tower gas entry pipeline (16); Described loose gas net (15) is arranged around described elementary scrubbing tower gas entry pipeline (16) above the outlet of described elementary scrubbing tower gas entry pipeline (16), and described loose gas net (15) outside engages with the inwall (12) of described elementary scrubbing tower, described first spray column inlet duct (202) upstream is connected with the second antisludging agent pipeline (19) by pipeline, and described second antisludging agent pipeline (19) is provided with control valve (192);

Described purification method comprises further:

6) the described one cyclonic dedusting coal gas entering the elementary scrubbing tower gas entry pipeline (16) of described elementary scrubbing tower (1) is upwards overflowed by the described loose gas net (15) arranged above the outlet of the elementary scrubbing tower gas entry pipeline (16) of described elementary scrubbing tower (1), air pocket is made to be divided into some cat-eyes or less bubble, coal gas and chilled water contact area are increased, thus washes out more solid particle in coal gas;

7) washings of secondary cyclone (9) from secondary cyclone gray water outlet (906) out, enter described elementary scrubbing tower grey water inlet (14), the described coal gas that subtend is overflowed carries out further spraying and dedusting;

8) described in, at least the symmetrically arranged multiple spray thrower of one deck spray thrower (13) carries out further spraying and dedusting to the described coal gas continuing upwards to overflow;

9) described coal gas continues upwards to spiral upwards by the lower edge (104) of the described first helical tray main body (102) of described elementary scrubbing tower circumferential spiral tower tray (10) along described first helical tray main body (102), washings with antisludging agent enter through multiple first spray holes (208) ejections that described first spray column (206) sidewall is arranged by described first spray column inlet duct (202), carry out spraying and dedusting to described coal gas;

10) the described coal gas after elementary spraying and dedusting is discharged by the described elementary scrubbing tower gas exit (110) being arranged on described elementary scrubbing tower (1) top, the bottom of described elementary scrubbing tower (1) is set at the bottom of conical tower, solid particle all falls to this, and is discharged by elementary scrubbing tower Heisui River outlet (18) that bottom is arranged; And

11) the described coal gas after elementary spraying and dedusting of discharging through described elementary scrubbing tower gas exit (110) enters the secondary rotary air gas entrance (902) in the upper portion side wall being tangentially arranged on described secondary cyclone (9), washings enter by being arranged on the tangential secondary whirlwind washing water inlet (908) arranged, described secondary rotary air gas entrance (902) top in an opposite direction, the described washings of tangential ejection carry out spray washing to described coal gas, export (904) through first dedusting coal gas by the secondary rotary air gas being arranged on described secondary cyclone (9) top and discharge the first dedusting gas entry pipe (26) entering described secondary wash tower (2) bottom, described washings after spray washing discharge by the secondary cyclone gray water outlet (906) being arranged on described secondary cyclone (9) bottom the elementary scrubbing tower grey water inlet (14) entering described elementary scrubbing tower (1).

27. gas purifying methods according to claim 26, the system (1000) of described gas purification comprise Heisui River discharge pipe (242), the first connecting bridge (640) and the second connecting bridge (660), the second helical tray main body (102 '), the second spray column inlet duct (202 ') and the second spray column (206 ') time

The system (1000) of described gas purification comprises secondary wash tower (2), and described secondary wash tower (2) comprises further:

Described secondary wash tower circumferential spiral tower tray (10 '), comprises further:

4.5.3) the second helical tray main body (102 '), the inner side of described second helical tray main body (102 ') is by setting of spiraling in the initial lateral around described second spray column (206 ') of its lower edge (104 '), engage with the sidewall (22) of described secondary wash tower (2) outside it, and described second spray column (206 ') extends downward beyond the lower end of described second helical tray main body (102 '), and extend downward beyond on the sidewall of described second helical tray main body lower end and bottom surface, lower end at described second spray column (206 ') and be provided with multiple second spray holes (208 '),

Wherein, described elementary scrubbing tower gas exit (110) is communicated with the described just dedusting gas entry pipe (26) of described secondary wash tower (2) by pipeline; Described secondary wash tower (2) comprising:

3) gas distributor (60), be arranged on the bottom of described secondary wash tower (2), described gas distributor (60) comprises further: gas distribution member (620), and it comprises further:

Wherein, at least two in described gas distribution member (620) described annular gas distributed pipelines (622, 623, 624) on its direction towards described water-bath (280) bottom, multiple straight hole (628 is provided with described at least the first connecting bridge (640) and the second connecting bridge (660), 642, 662), and at least two described annular gas distributed pipelines (622 in described gas distribution member (620), 623, 624) on its direction towards water-bath (280) bottom, described multiple straight hole (628) interleaved is provided with multiple tangential hole (626), the opening of described multiple tangential hole (626) is set to tilt laterally down,

Described purification method comprises further:

12) the described coal gas after elementary spraying and dedusting of being discharged by the described elementary scrubbing tower gas exit (110) being arranged on described elementary scrubbing tower (1) top or exported the described warp just dedusting coal gas of (904) discharging by the secondary rotary air gas being arranged on described secondary cyclone (9) top, enter the first dedusting gas entry pipe (26) of described secondary wash tower (2) bottom, described coal gas enters described gas distributor (60) the first connecting bridge (640) by least one wireway (284) be arranged on the gas distributor (60) in described just dedusting gas entry pipe (26) top water-bath (280) with by least two annular gas distributed pipelines (622,623,624) gas distribution member (620) formed, and from the described annular gas distributed pipeline (622 of at least two described gas distribution member (620), 623,624) the multiple straight holes (628 arranged on its direction towards described water-bath (280) bottom with described at least the first connecting bridge (640) and the second connecting bridge (660), 642,662), and at least two described annular gas distributed pipelines (622 in described gas distribution member (620), 623,624) the multiple tangential holes (626) tilted laterally down arranged with described multiple straight hole (628) interleaved on its direction towards water-bath (280) bottom spray, continue upwards to overflow washings liquid level (250),

13) the described coal gas overflowing washings liquid level (250) upwards contacts dedusting through at least two-layer tower tray (265) with the high pressure buck entered by high pressure grey water inlet (270); And

14) coal gas continues upwards to spiral upwards by the lower edge (104 ') of the described second helical tray main body (102 ') of secondary wash tower circumferential spiral tower tray (10 ') along described second helical tray main body (102 '), washings with antisludging agent enter through multiple second spray holes (208 ') ejections that described second spray column (206 ') sidewall is arranged by described second spray column inlet duct (202 '), spraying and dedusting is carried out to described coal gas, dustless clean gas after dedusting is discharged by the dustless gas exit (210) arranged at described secondary wash tower (2) top,

Wherein, the bottom of the described water-bath (280) that described secondary wash tower (2) bottom is arranged is taper, and described Heisui River discharge pipe (242) that the coal ash dust in washings is arranged by its portion of bottom centre is discharged.

28. gas purifying methods according to claim 27, when the system (1000) of described gas purification comprises steam condensate entrance (232), described purification method comprises further:

15) continue upwards by contacting dedusting with the solid valve tower tray (225) of the multilayer arranged between described steam condensate entrance (232) with steam condensate in described secondary wash tower circumferential spiral tower tray (10 ') top by the coal gas after described secondary wash tower circumferential spiral tower tray (10 ') dedusting; And

Coal gas continues upwards to remove with the Combined defoamer (290) of described steam condensate entrance (232) top the micro-foam wherein carried secretly by being arranged on the solid valve tower tray (225) of described multilayer.

29. gas purifying methods according to claim 28, when the system (1000) of described gas purification comprises the second mixed aerosol device (80 '), the described moisture dustless clean gas after dedusting of being discharged by the dustless gas exit (210) arranged at described secondary wash tower (2) top in described gas purifying method enters low temperature/conversion methanol wash column system process, and the pure synthesis gas obtained enters methanol-fueled CLC or F-T synthesis system is reacted; The liquid of the liquid channel of described first mixed aerosol device (80) and the second mixed aerosol device (80 ') is the water vapour conversion condensate liquid from described low temperature/conversion methanol wash column system, the Heisui River of discharging from described Heisui River discharge pipe (242) that described one cyclonic Heisui River outlet (706), elementary scrubbing tower Heisui River outlet (18) and described secondary wash tower bottom are arranged enters black water treatment system process, and the buck obtained after described black water treatment system process enters the high pressure grey water inlet (270) of described secondary wash tower; The buck extracted out through the grey water-circulating pump (230) of described secondary wash tower (2) enters respectively:

1. the one cyclonic washing water inlet (708) of described primary cyclone (7), and/or

2. the secondary whirlwind washing water inlet (908) of secondary cyclone (9), and/or

3. elementary scrubbing tower grey water inlet (14), and/or

4. coal gasifier as chilled water and for slurrying enter coal slurry gasifier reaction produce raw gas, and/or

5. described mixed aerosol device (80) is as atomization water, and/or

6. described elementary scrubbing tower first spray column inlet duct (202) is as the shower water sprayed to described circumferential spiral tower tray (10) side direction.

Application in the purification of the coal gas that 30. primary cyclones (7) according to any one of claim 1-7 or the system for gas purification according to Claim 8 described in-24 any one (1000) or the gas purifying method according to any one of claim 25-29 are produced at the pressurized gasification being raw material with coal, petroleum coke, living beings and/or flammable trade waste.