CN103265978A - Integrated system and method for catalytic cracking and dust removal of medium-and-low temperature dry distillation coal gas - Google Patents

Integrated system and method for catalytic cracking and dust removal of medium-and-low temperature dry distillation coal gas Download PDF

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CN103265978A
CN103265978A CN2013102144262A CN201310214426A CN103265978A CN 103265978 A CN103265978 A CN 103265978A CN 2013102144262 A CN2013102144262 A CN 2013102144262A CN 201310214426 A CN201310214426 A CN 201310214426A CN 103265978 A CN103265978 A CN 103265978A
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gas
metallic filter
catalyst
temperature
dust removal
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CN103265978B (en
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陈静升
张志刚
樊英杰
冉伟利
苗青
尚建选
闵小建
郑化安
张生军
马勇
贾培军
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Shaanxi Coal and Chemical Technology Institute Co Ltd
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Shaanxi Coal and Chemical Technology Institute Co Ltd
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P20/00Technologies relating to chemical industry
    • Y02P20/50Improvements relating to the production of bulk chemicals
    • Y02P20/584Recycling of catalysts

Abstract

The invention provides an integrated system and a method for catalytic cracking and dust removal of medium-and-low temperature dry distillation coal gas. The system comprises a mobile particle bed dust remover and a plurality of metal filters in parallel to one another, wherein the mobile particle bed dust remover adopts a catalyst as a filter material; a cyclone separator is connected to the top of the mobile particle bed dust remover; a vibrating screen is connected to the bottom of the mobile particle bed dust remover and is connected with the cyclone separator through a lifting pipe; after being subjected to cracking and dust removal under the action of the catalyst, the medium-and-low temperature dry distillation coal gas enters the metal filters, is further filtered, and is discharged; the catalyst containing dust enters the lifting pipe through the vibrating screen, is regenerated in the lifting pipe, and then returns to the mobile particle bed dust remover; and by filling oxygen-containing flue gas into the lifting pipe, the catalyst can be regenerated. According to the system, pyrolytic oil gas and pyrolytic coke breeze are effectively separated, the catalyst is introduced into a dust removal process, and the quality of pyrolytic tar is remarkably improved.

Description

Low-temperature pyrolysis coal gas catalytic pyrolysis and dust removal integrated system and method in a kind of
[technical field]
The present invention relates to the coal gas dust removal field, the system and method for volatile matter dedusting in the low temperature pulverized coal pyrolysis technology in relating in particular to.
[background technology]
Coal branch matter clean and effective transformation technology route is the best outlet of present coal clean and effective comprehensive utilization, and the low temperature pyrogenation technology is the core technology that coal branch matter clean and effective transforms route in the fine coal.Though adopting solid thermal carriers at present is the amplification that the pulverized coal pyrolysis technology of thermal source such as the new method distillation process of L-R technology, Garrett technology and DaLian, China Polytechnics etc. have all been finished process, does not all obtain large-scale industrial application.Wherein, the dedusting technology of dust-laden volatile matter is the technical barrier that above-mentioned pulverized coal pyrolysis technology generally runs into.Trace it to its cause, characteristics such as the pyrolysis gas that produces in the low temperature pyrogenation process in the fine coal has complicated component, the heavy tar component is many, dust content big, dust out-of-shape, gas temperature height, so pyrolysis coke breeze and pyrolysis oil-gas high-temperature ON-LINE SEPARATION effect are undesirable, finally cause in the coal tar ash oontent higher, second-rate, can't reach the quality index of the further deep processing of coal tar, thereby hinder the process of industrialization of pulverized coal pyrolysis technology.Therefore, the high-effective dust-removing technology of volatile matter becomes the key issue of needing solution in the low-rank coal in the low temperature pyrogenation course of industrialization badly in the pyrolytic process.
Dusty gas fly-ash separator commonly used in the art technology range of application mainly contains cyclonic separator, grain bed fly-ash separator and wire gauze filter etc.Wherein, the tornado dust collector pressure drop is generally higher, and low for the grit collection efficiency below the 5-10um, can only reach about 60-80%, so tornado dust collector generally can only be as pre-dust removal installation.The grain bed fly-ash separator generally with the silicon oxide of coal particle, quartz sand, Wingdale, compression moulding, alumina balls etc. as filtrate, at present generally be mainly used in removing the dust in high-temperature flue gas or the coal gas of high temperature, and the heavy tar component causes the phenomenon of the dead bed of particle layers easily when being applied to low-temperature pyrolysis coal gas dust removal operating mode, and therefore conventional grain bed is then also inapplicable for removing the heavy tar composition of carrying secretly in the pyrolysis gas.In addition, the Bed Filtration device is also not high to the fine dust collection efficiency, is difficult to satisfy the operating mode that filtering accuracy is had relatively high expectations.And wire gauze filter has good hot shock resistance and mechanical property, and has higher filtering accuracy.Yet when dusty gas concentration was higher, wire gauze filter also existed easy obstruction, blowback frequency to cross problems such as height.At present lot of domestic and international R﹠D institution all attempts various separation, method for dust removal, attempts to develop a kind of system and method for comparatively feasible middle low temperature pulverized coal pyrolysis coal gas high-effective dust-removing.
[summary of the invention]
In order to solve in the fine coal technical barrier of pyrolysis oil gas and pyrolysis coke breeze high efficiency separation in the low temperature pyrogenation technology, the invention provides a kind of in low-temperature pyrolysis coal gas catalytic pyrolysis and dust removal integrated system and method.
Low-temperature pyrolysis coal gas catalytic pyrolysis and dust removal integrated system comprise moving granular bed fly-ash separator and a plurality of metallic filter arranged side by side in a kind of; Described moving granular bed fly-ash separator is filtrate with the catalyzer; The top of described moving granular bed fly-ash separator is connected with cyclonic separator, and the bottom of described moving granular bed fly-ash separator is connected with vibratory screening apparatus, and described vibratory screening apparatus links to each other by riser tube with cyclonic separator; Middle low-temperature pyrolysis coal gas enters in the moving granular bed fly-ash separator, under the effect of catalyzer, enter into after the cracking dedusting and further filter the back discharge in the metallic filter, the catalyzer that contains dust enters into riser tube through vibratory screening apparatus, catalyzer is realized turning back to again in the moving granular bed fly-ash separator after the regeneration in riser tube, and feeding in the described riser tube has oxygen gas to realize the regeneration of catalyzer.
As the preferred embodiments of the present invention, described vibratory screening apparatus links to each other with the moving granular bed fly-ash separator by line of pipes, and the axis of vibratory screening apparatus becomes the obtuse angle setting with the axis of moving granular bed fly-ash separator.
As the preferred embodiments of the present invention, described metallic filter is connected with source nitrogen and flue gas source by the blowback air entrance.
As the preferred embodiments of the present invention, described catalyzer is the USY molecular sieve catalyst particle of metal W modification.
As the preferred embodiments of the present invention, the gas entry of described metallic filter is arranged on the side of metallic filter, and gas exit is arranged on the top of metallic filter; Described blowback air entrance is arranged on the top of metallic filter, and the blowback air outlet is arranged on the bottom of metallic filter.
A kind of method for dust removal of above-mentioned integral system, catalyzer forms beds in the moving granular bed fly-ash separator, central low-temperature pyrolysis coal gas enters into when also beds is passed in cross-flow in the moving granular bed fly-ash separator, the catalytic pyrolysis under the effect of granules of catalyst of heavy tar component wherein, generate the comparatively component of lightweight, simultaneously, most of dust in the pyrolysis gas is trapped at the granules of catalyst bed, after cracking and the dedusting, the pyrolysis coal gas that comes out in the moving granular bed fly-ash separator enters in the metallic filter, to the dedusting again of the fine dusts in the pyrolysis coal gas; The granules of catalyst that contains dust is realized separating in vibratory screening apparatus, wherein, dust is discharged from, and granules of catalyst enters in the riser tube, in riser tube, the tar bur that sticks to catalyst surface is back to the moving granular bed fly-ash separator after by the oxygen gas oxidizing fire again.
As the preferred embodiments of the present invention, before the dedusting, granules of catalyst at first enters into vibratory screening apparatus and riser tube successively in the moving granular bed fly-ash separator, riser tube feeds that temperature is arranged is 600-650 ℃ oxygen gas, and granules of catalyst is 480-550 ℃ by the oxygen gas preheating until catalyst temperature in riser tube.
As the preferred embodiments of the present invention, before the dedusting, close gas entry and the gas exit of metallic filter, in metallic filter, feed purge gas nitrogen, the air of purging in metallic filter prevents dry distillation gas and air formation explosion gas in the dust removal process all with the nitrogen gas displacement; The temperature of described nitrogen is 480-550 ℃.
As the preferred embodiments of the present invention, a plurality of metallic filter alternations, one of them metallic filter is when work, other metallic filters carry out pulse cleaning, the concrete grammar of regeneration is: with high temperature nitrogen metallic filter is carried out pulsed and oppositely purge, the temperature of described high temperature nitrogen is 480-550 ℃, and sweeping gas and lime-ash are discharged from the metallic filter bottom; Close source nitrogen then, with containing oxygen high-temperature flue gas source to purging in the metallic filter, the temperature of described high-temperature flue gas is 600-650 ℃; And then source purge gas switched to source nitrogen, all with the nitrogen gas displacement, the tar bur in metallic filter is eliminated clean and flue gas is all replaced with nitrogen gas so repeatedly with the flue gas in the metallic filter.
As the preferred embodiments of the present invention, described catalyzer is selected from the W/USY catalyzer, and the preparation method is: (1) is steeping fluid with the ammonium metatungstate solution, be carrier with USY, the USY carrier impregnation is adsorbed in the above-mentioned steeping fluid, leave standstill, after the drying, at 450-480 ℃ of roasting 5h; (2) vulcanize activation treatment in mixed atmosphere, the temperature of sulfuration activation is 350~390 ℃, and the time is 4-6 hour, and mixed atmosphere is for to count with volume ratio: H 2S: H 2=5: 95; (3) add binding agent in the powder that step (2) obtains, the spherical catalyst particle is made in extrusion forming, and wherein, the W charge capacity of described catalyzer is 3-7.5%.
Compared with prior art, integral system of the present invention and method have the following advantages at least: system of the present invention comprises moving granular bed fly-ash separator and a plurality of metallic filter arranged side by side, in the moving granular bed fly-ash separator, middle low-temperature pyrolysis coal gas is under catalyst action, heavy tar is generated the comparatively component of lightweight by catalytic pyrolysis, simultaneously, most of dust in the pyrolysis gas is held back by the granules of catalyst bed, after cracking and the dedusting, pyrolysis coal gas in metallic filter to fine dusts dedusting again, and after the granules of catalyst that contains dust separates in vibratory screening apparatus, dust is discharged from, granules of catalyst enters in the riser tube, and in riser tube, the tar bur that sticks to catalyst surface is back to the moving granular bed fly-ash separator after by the oxygen gas oxidizing fire.Hence one can see that, and system of the present invention has not only carried out effective the separation with pyrolysis oil gas with the pyrolysis coke breeze, and catalyzer is incorporated in the above-mentioned dust removal process, has significantly improved the quality of pyrolytic tar.
[description of drawings]
Fig. 1 is the synoptic diagram of volatile matter high-efficiency dust removal system in the low temperature pulverized coal pyrolysis technology in a kind of being suitable for of the present invention;
Fig. 2 is along the sectional view of C-C ' face among Fig. 1;
It is as follows respectively to identify implication among the figure:
A. Bed Filtration system; B. metal screen filtering system;
1. moving granular bed fly-ash separator; 2. vibratory screening apparatus; 3. riser tube; 4. cyclonic separator; 5. catalyst loading mouth; 6. grain bed gas entry; 7. grain bed gas exit; 8a, 8b are metallic filters; 9a, 9b are the metallic filter gas entries; 10a, 10b are the metallic filter gas exits; 11a, 11b are the purge gas entrances; 12a, 12b are the purge gas outlets; V 1, V 2It is the gas entry valve; V 3, V 4It is the gas exit valve; V 5, V 6It is the blowback air inlet valve; V 7, V 8It is the blowback air outlet valve.
[embodiment]
Below in conjunction with accompanying drawing the present invention is described in detail:
Built-up type dust-removal system of the present invention mainly is made up of the A of Bed Filtration system and metal screen filtering system B.Wherein the A of Bed Filtration system mainly comprises moving granular bed fly-ash separator 1, vibratory screening apparatus 2, riser tube 3, cyclonic separator 4.Wherein, moving granular bed fly-ash separator 1 top is provided with catalyst loading mouth 5, and and arranged on left and right sides respectively is provided with gas entry 6 and gas exit 7.Metal screen filtering system B mainly comprises one group of metallic filter 8a arranged side by side and metallic filter 8b (the present invention is example with two metallic filters), wherein metallic filter 8a side is provided with metallic filter gas entry 9a, the top is respectively equipped with metallic filter gas exit 10a and purge gas entrance 11a, and the bottom is provided with purge gas outlet 12a; Similarly, metallic filter 8b side is provided with metallic filter gas entry 9b, and the top is respectively equipped with metallic filter gas exit 10b and purge gas entrance 11b, and the bottom is provided with purge gas outlet 12b.The structure of metallic filter 8a and metallic filter 8b is identical, is used alternatingly in the dust removal process.
Moving granular bed fly-ash separator 1 outlet at bottom is connected with vibratory screening apparatus 2 entrances by line of pipes, vibratory screening apparatus 2 is used for granules of catalyst and dust separation, the outlet of vibratory screening apparatus 2 is connected with riser tube 3 entrances by pipeline, has finished conveying and the regenerative process of granules of catalyst in riser tube inside.Riser tube 3 outlets are connected with cyclonic separator 4 entrances by line of pipes, and cyclonic separator 4 tops are provided with exhanst gas outlet, and cyclonic separator 4 outlet at bottoms are connected with moving granular bed fly-ash separator 1 top entrance by pipeline.
Moving granular bed fly-ash separator 1 right side gas exit is divided into two-way, leads up to line of pipes through valve V 19a is connected with metallic filter 8a side gas inlet, another road by line of pipes through valve V 29b is connected with metallic filter 8b side gas inlet, and metallic filter 8a and metallic filter 8b are equipped with dedusting gas exit 10a and 10b.Metallic filter 8a top dedusting gas exit 10a and valve V 3Be connected metallic filter 8b top dedusting gas exit 10b and valve V 4Be connected.
Source nitrogen or the outlet of flue gas source are divided into two-way, lead up to line of pipes through valve V 5Sweep gas entrance 11a is connected with metallic filter 8a top, another road by line of pipes through valve V 6Sweep gas entrance 11b is connected with metallic filter 8b top.Metallic filter 8a bottom dedusting gas exit 12a and valve V 7Be connected metallic filter 8b bottom dedusting gas exit 12b and valve V 8Be connected.
The present invention is based on moving granular bed strainer and the dedusting of metal screen combination of filters and in dust removal process, introduce catalyzer, formed catalyse pyrolysis and dust removal integrated novel process, novel method, mainly may further comprise the steps:
(1) set-up procedure before the dedusting:
Add granules of catalyst from moving granular bed fly-ash separator 1 top catalyst loading mouth 5, it is piled up in the grain bed fly-ash separator form catalyst layer, granules of catalyst enters vibratory screening apparatus 2 and riser tube 3 successively, the gaseous media that riser tube bottom feeds is 600-650 ℃ of high temperature oxygen gas, and granules of catalyst is 480-550 ℃ by the high-temperature flue gas preheating until reaction bed temperature in lifting process.
When metallic filter purges, cut off gas inlet valve V 1, V 2With gas exit valve V 3, V 4, open blowback air inlet valve V 5, V 6With blowback air outlet valve V 7, V 8, feed 480-550 ℃ nitrogen, purged several minutes, with the air in the metallic filter all with the nitrogen gas displacement, to prevent that dry distillation gas and air form explosion gas in the dust removal process.Simultaneously, the metallic filter dust-removal system is preheated, and temperature maintenance is at 480-550 ℃.
(2) dust removal process:
In low-temperature pyrolysis coal gas enter when passing layer of catalyst particles from grain bed gas entry 6, one side heavy tar component catalytic pyrolysis under the effect of granules of catalyst, generate the comparatively component of lightweight, most of dust is trapped in layer of catalyst particles in the gas of pyrolysis simultaneously.Middle low-temperature pyrolysis coal gas is finished in beds after catalytic pyrolysis and the dedusting, discharges from grain bed gas exit 7.
In order further to remove fine dusts in the pyrolysis coal gas, improve the precision of coal gas dust removal, the pyrolysis coal gas that comes out from grain bed gas exit 7 passes through gas entry valve V 1The back enters metallic filter 8a from metallic filter gas entry 9a, is further held back on filter core through entrained fine dusts in the pyrolysis coal gas behind the one-time dedusting.Final dusting coal gas is discharged from metallic filter gas exit 10a.
(3) granules of catalyst regenerative process:
Granules of catalyst regeneration comprises following process in this system: middle low-temperature pyrolysis coal gas enters moving granular bed fly-ash separator 1, most of dust in when beds is passed in cross-flow in the low temperature coal gas is held back by granules of catalyst, the granules of catalyst that contains dust slowly moves down under action of gravity, discharge from moving granular bed fly-ash separator 1 bottom, send into the top entrance of vibratory screening apparatus 2, granules of catalyst separates in vibratory screening apparatus 2 with dust, and wherein the vertical view of vibratory screening apparatus extraction plate as shown in Figure 2.Dust is discharged system from the bottom of vibratory screening apparatus 2, and granules of catalyst is sent into the bottom entrance of riser tube 3 by line of pipes.Gaseous media in the riser tube is 600-650 ℃ of high temperature oxygen gas, oxygen concentration is 5%, oxygen gas is in the process that promotes granules of catalyst, and the simultaneous oxidation burning sticks to the tar bur on granules of catalyst surface, thereby has realized the regeneration of granules of catalyst.Riser tube 3 tops communicate with cyclonic separator 4, and high-temperature flue gas and granules of catalyst are finished gas solid separation in cyclonic separator 4, and high-temperature flue gas is discharged system from cyclonic separator 4 top exits, and granules of catalyst returns moving granular bed fly-ash separator 1 by conduit.
(4) metallic filter regenerative process:
The metal filtration dust-removal system is mainly composed in parallel by two groups of metallic filters (8a and 8b), switches mutually between metallic filter 8a and the metallic filter 8b, to guarantee the operation of dust-removal system continous-stable.Be that example will be with explanation with metallic filter 8a dedusting and metallic filter 8b regenerative process below.
When metallic filter 8a dedusting and metallic filter 8b regeneration is carried out simultaneously, the gas entry valve V of metallic filter 8a 1With gas exit valve V 3Automatically open, in the purge gas inlet valve V of this while metallic filter 8b 6With purge gas outlet valve V 8Also open all the other valve V automatically 2, V 4, V 5, V 7All be in closing condition.
During metallic filter 8a dedusting, gas entry valve V 1With gas exit valve V 3Be in open mode, the pyrolysis coal gas that comes out from grain bed gas exit 7 passes through gas entry valve V 1The back enters metallic filter 8a from metallic filter gas entry 9a, is further held back on filter core through entrained fine dusts in the pyrolysis coal gas behind the one-time dedusting.Final dusting coal gas is discharged from metallic filter gas exit 10a.
In this simultaneously, metallic filter 8b finishes regeneration, at this moment the purge gas inlet valve V of metallic filter 8b 6With purge gas outlet valve V 8Be in open mode, concrete regenerative process may further comprise the steps:
At first, draw high temperature nitrogen successively by valve V from source nitrogen 611b enters metallic filter 8b with the sweep gas entrance, and high temperature nitrogen is carried out pulsed to metallic filter 8b and oppositely purged, and the temperature of high temperature nitrogen is 480-550 ℃, and sweeping gas and lime-ash are then discharged from metallic filter 8b outlet at bottom 12b; Next closes source nitrogen, draws high-temperature flue gas from the flue gas source successively by valve V 611b enters metallic filter 8b with the sweep gas entrance, and the temperature of high-temperature flue gas is 600-650 ℃, and containing oxygen concentration is 5%, purges for several times; At last source purge gas is switched to source nitrogen, in like manner purge for several times, the flue gas in the metallic filter is all replaced with nitrogen gas, to prevent dry distillation gas and oxygen-containing gas formation explosion gas in the dust removal process.Simultaneously, metallic filter filtering system temperature maintenance is at 480-550 ℃.
Be 50-60min the filtration cycle of metallic filter, for guaranteeing metal filtering system high-effective dust-removing, behind the dedusting 50-60min, switch mutually between metallic filter 8a and the metallic filter 8b, at this moment, the gas entry valve V of metallic filter 8a 1With gas exit valve V 3Automatically close, in the purge gas inlet valve V of this while metallic filter 8b 6With purge gas outlet valve V 8Also close automatically, and all the other valve V 2, V 4, V 5, V 7All open automatically.At this moment, when metallic filter 8b carries out dedusting and metallic filter 8a regeneration, this process is similar to the above process, does not repeat them here.The control of total system is finished by the PLC operation control system in the said process.
According to the method for dust removal of above-mentioned middle low-temperature pyrolysis coal gas, described gas is preferably the middle low-temperature pyrolysis coal gas that contains tar, and the present invention is specially adapted to contain the low temperature pyrogenation coal gas dust removal of heavy tar component.
According to above-mentioned middle low-temperature pyrolysis coal gas dust removal method, described catalyzer is the USY molecular sieve catalyst particle of metal W modification, can be with the slight catalytic pyrolysis of heavy tar component in the pyrolysis coal gas, increase the productive rate of high added value chemical such as BTX in the pyrolysis product, thereby significantly improved the quality of pyrolytic tar.
Preparation of catalysts method of the present invention:
W/USY Preparation of catalysts of the present invention adopts equi-volume impregnating, and active ingredient W evenly is impregnated on the carrier USY.Below catalyzer W/USY preparation process is described below:
1. take by weighing a certain amount of ammonium metawolframate ((NH 4) 6W 7O 246H 2O), add an amount of distilled water, be mixed with steeping fluid.
2. a certain amount of USY carrier impregnation is adsorbed in the above steeping fluid for preparing, after stirring, leaves standstill 5h under the room temperature, again through 110-120 ℃ of dry 5h, make the W/USY molecular sieve catalyst behind the 450-480 ℃ of roasting 5h.
3. the theoretical negative carrying capacity of reactive metal of the present invention is defined as the quality of supported active metal oxide on the 100g carrier, and the W charge capacity of this catalyzer is 3-7.5%.
4.W/USY catalyzer need be done the sulfuration activation treatment before use, catalyst vulcanization activation concrete operations condition is: H in the mixed gas 2S: H 2=5: 95 (volume ratios), the sulfuration activation temperature is 350-390 ℃, curing time is 4-6h.
5. in the above-mentioned fine catalyst for preparing, add a certain amount of binding agent, be pressed into the ball shape catalyst particle that particle diameter is 3-8mm by extrusion forming.
Elaborate below in conjunction with the system and method for the present invention of embodiment:
The Bed Filtration medium is the USY molecular sieve catalyst W/USY of tungsten modification in the dust-removal system of the present invention, and its granularity is 3-8mm effect optimum; And the material of filter core is the 310S-20 sintered metal materials in the metallic filter, and its microtexture is the silk screen reticulated structure.When dedusting experiment is carried out, at first with granules of catalyst from pack into moving granular bed and form the granules of catalyst bed of certain altitude of charging opening, keeping the granules of catalyst bed is 480-550 ℃.The moving-bed catalyst particles slowly moves down under action of gravity, and returns moving granular bed by riser tube with the granules of catalyst lifting and after the cyclonic separator separation, and forms the granules of catalyst reprocessing cycle.Granules of catalyst because surface adhesion has the heavy tar component, needs in lifting process oxidizing fire to remove the heavy tar component of granules of catalyst surface adhesion in dust removal process.The gaseous media of carrying granules of catalyst in the riser tube is 600-650 ℃ high temperature oxygen gas, and its oxygen concentration control is in 5%.The riser tube top is provided with a cyclonic separator, and high-temperature flue gas is discharged system from cyclonic separator top, finish regenerated catalyst particles and turn back in the moving granular bed by transfer line.Then purge by 480-550 ℃ of high temperature nitrogen earlier before the metallic filter dedusting, finish the internal gas displacement on the one hand, form explosion gas to prevent that the metallic filter internal gas from mixing with dry distillation gas, on the other hand the metal filtration system temperature is risen to 480-550 ℃ and keep this temperature.Need to carry out deashing after metallic filter dedusting for some time and handle, to keep higher efficiency of dust collection.Metallic filter regeneration comprises following process: at first carry out pulsed from 480-550 ℃ of high temperature nitrogen of purge gas entrance feeding and oppositely purge, lime-ash is then discharged from the metallic filter outlet at bottom; Next feeds 600-650 ℃ of high temperature oxygen gas, and oxygen concentration purges for several times less than 5%; Feed 480-550 ℃ of high temperature nitrogen at last again and finish gas displacement in the metallic filter, namely finish the whole regenerative process of metallic filter.The metal filtration system is provided with the metallic filter of two parallel connections, can realize one of them metallic filter in dedusting, and another strainer is finished pulse cleaning, so switches to reach the purpose of continuous dedusting.
Middle low-temperature pyrolysis coal gas is a kind of tawny, the gas vapour mixture of intense stimulus smell is arranged, except containing CO, H 2, CH 4, CO 2, outside the aliphatic hydrocarbon compound CmHn, also contain compositions such as a large amount of dust, heavy tar, water vapor.
During this dust-removal system dedusting, the dust-laden pyrolysis gas (480-550 ℃) that comes out from low temperature pulverized coal pyrolysis technology enters in the moving granular bed fly-ash separator, pyrolysis gas is when passing granules of catalyst W/USY, one side heavy tar component generation catalytic pyrolysis, generate the comparatively component of lightweight, most of dust is trapped at the granules of catalyst bed in the pyrolysis gas on the other hand, thereby removes most dust in the pyrolysis gas.In order to improve filtering accuracy, then to send into metallic filter through the pyrolysis coal gas after the moving granular bed catalysis dedusting and carry out final dusting, final dusting coal gas is discharged system from the metallic filter top exit.This dust-removal system can realize system stable operation in 48h, reach more than 99% greater than the particulate efficiency of dust collection of 10um, and dustiness satisfies industrial requirements less than 4% in the pyrolytic tar.In addition, light component content such as BTX has improved more than 80% than ordinary filter (Ceramic Balls) in the pyrolytic tar, has significantly improved the quality of pyrolytic tar.
Built-up type dust-removal system of the present invention is mainly combined by granular bed and wire gauze filter, and wherein the filtrate of granular bed is the USY molecular sieve catalyst with metal W modification of certain particle diameter.Compare with existing dedusting technology, beneficial effect of the present invention is:
1, built-up type dust-removal system of the present invention is combined by granular bed and wire gauze filter.Wherein granular bed can move by continous-stable, has higher coal gas dust removal processing power.And wire gauze filter has good hot shock resistance and mechanical property, is suitable for continuous reverse impulse and cleans, and reproducibility is good, and the wire gauze filter aperture is easy to control the filtering accuracy height with hole.Therefore, both make up dedusting and are conducive to display one's respective advantages, thereby reach the purpose of high-effective dust-removing.
2, the present invention introduces the pyrolysis of coal system with catalyzer, can be with the further catalytic pyrolysis of heavy tar component of easy condensation and bonding in the pyrolysis gaseous product, make the lighting of pyrolysis gaseous product, avoided heavy tar and dust to attach to the inner-walls of duct blocking pipeline, the heavy tar component causes the extremely difficult problem of bed of particle layers easily in the low-temperature pyrolysis coal gas dust removal process thereby solved.Therefore, the present invention is specially adapted to contain the low temperature pyrogenation coal gas dust removal of heavy tar component.
3. adopt the modified molecular sieve catalyst particle as filtration medium among the present invention, on having realized traditional sense in the grain bed dedusting, also realized the pyrolysis gaseous product is carried out the selectivity catalytic pyrolysis, thereby increased the productive rate of high added value chemical such as BTX in the pyrolysis product, significantly improved the quality of pyrolytic tar.
4. in the present coal catalyse pyrolysis system, catalyzer difficult the realization is recycled, thereby hindered the development of coal catalyse pyrolysis technology to a great extent, and the present invention has more easily realized pyrolysis of coal catalyst regeneration and high efficiente callback utilization in riser tube, has solved the difficult problem that catalyzer is difficult to recycle in the current pyrolysis of coal system.
5. the filtrate in the granular bed among the present invention is made up of the molecular sieve catalyst of modification, therefore, by the characteristics such as structure, active centre and acidity of regulatory molecule sieve catalyst, thereby can regulate and control composition and the distribution of pyrolysis product flexibly.
6. the present invention adopts the built-up type dedusting method to realize low temperature coal gas catalytic pyrolysis and dust removal integrated, with pyrolysis gas catalytic pyrolysis and two unit organic integration of pyrolysis gas dedusting in a system, be skillfully constructed, the single unit system compact construction, floor space reduces, thereby has lowered investment and the working cost of equipment.
7. built-up type dust-removal system of the present invention is easy to deashing, favorable regeneration effect, the system that can realize operation continuously steady in a long-term.
It should be noted that at last: obviously, above-described embodiment only is for example of the present invention clearly is described, and is not the restriction to embodiment.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here need not also can't give all embodiments exhaustive.And the apparent variation of being amplified out thus or change still are among protection scope of the present invention.

Claims (10)

1. low-temperature pyrolysis coal gas catalytic pyrolysis and dust removal integrated system in one kind is characterized in that: comprise moving granular bed fly-ash separator (1) and a plurality of metallic filter arranged side by side (8a, 8b); Described moving granular bed fly-ash separator (1) is filtrate with the catalyzer; The top of described moving granular bed fly-ash separator (1) is connected with cyclonic separator (4), and the bottom of described moving granular bed fly-ash separator (1) is connected with vibratory screening apparatus (2), and described vibratory screening apparatus links to each other by riser tube (3) with cyclonic separator; Middle low-temperature pyrolysis coal gas enters in the moving granular bed fly-ash separator (1), under the effect of catalyzer, enter into after the cracking dedusting and further filter the back discharge in the metallic filter, the catalyzer that contains dust enters into riser tube through vibratory screening apparatus, catalyzer is realized turning back to again in the moving granular bed fly-ash separator (1) after the regeneration in riser tube, and feeding in the described riser tube has oxygen gas to realize the regeneration of catalyzer.
As claimed in claim 1 a kind of in low-temperature pyrolysis coal gas catalytic pyrolysis and dust removal integrated system, it is characterized in that: described vibratory screening apparatus (2) links to each other with moving granular bed fly-ash separator (1) by line of pipes, and the axis of vibratory screening apparatus becomes the obtuse angle setting with the axis of moving granular bed fly-ash separator.
As claimed in claim 1 a kind of in low-temperature pyrolysis coal gas catalytic pyrolysis and dust removal integrated system, it is characterized in that: described metallic filter is connected with source nitrogen and flue gas source by blowback air entrance (11a and 11b).
As claimed in claim 1 a kind of in low-temperature pyrolysis coal gas catalytic pyrolysis and dust removal integrated system, it is characterized in that: described catalyzer is the USY molecular sieve catalyst particle of metal W modification.
As claimed in claim 3 a kind of in low-temperature pyrolysis coal gas catalytic pyrolysis and dust removal integrated system, it is characterized in that: the gas entry of described metallic filter is arranged on the side of metallic filter, and gas exit is arranged on the top of metallic filter; Described blowback air entrance is arranged on the top of metallic filter, and the blowback air outlet is arranged on the bottom of metallic filter.
6. method for dust removal based on any described system among the claim 1-5, it is characterized in that: catalyzer forms beds in the moving granular bed fly-ash separator, central low-temperature pyrolysis coal gas enters into when also beds is passed in cross-flow in the moving granular bed fly-ash separator, the catalytic pyrolysis under the effect of granules of catalyst of heavy tar component wherein, generate the comparatively component of lightweight, simultaneously, most of dust in the pyrolysis gas is trapped at the granules of catalyst bed, after cracking and the dedusting, the pyrolysis coal gas that comes out in the moving granular bed fly-ash separator enters in the metallic filter, to the dedusting again of the fine dusts in the pyrolysis coal gas; The granules of catalyst that contains dust is realized separating in vibratory screening apparatus, wherein, dust is discharged from, and granules of catalyst enters in the riser tube, in riser tube, the tar bur that sticks to catalyst surface is back to the moving granular bed fly-ash separator after by the oxygen gas oxidizing fire again.
7. method for dust removal as claimed in claim 6, it is characterized in that: before the dedusting, granules of catalyst at first enters into vibratory screening apparatus and riser tube successively in the moving granular bed fly-ash separator, riser tube feeds that temperature is arranged is 600-650 ℃ oxygen gas, and granules of catalyst is 480-550 ℃ by the oxygen gas preheating until catalyst temperature in riser tube.
8. method for dust removal as claimed in claim 6, it is characterized in that: before the dedusting, close gas entry and the gas exit of metallic filter, in metallic filter, feed purge gas nitrogen, the air of purging in metallic filter prevents dry distillation gas and air formation explosion gas in the dust removal process all with the nitrogen gas displacement; The temperature of described nitrogen is 480-550 ℃.
9. method for dust removal as claimed in claim 6, it is characterized in that: a plurality of metallic filter alternations, one of them metallic filter is when work, other metallic filters carry out pulse cleaning, the concrete grammar of regeneration is: with high temperature nitrogen metallic filter is carried out pulsed and oppositely purge, the temperature of described high temperature nitrogen is 480-550 ℃, and sweeping gas and lime-ash are discharged from the metallic filter bottom; Close source nitrogen then, with containing oxygen high-temperature flue gas source to purging in the metallic filter, the temperature of described high-temperature flue gas is 600-650 ℃; And then source purge gas switched to source nitrogen, all with the nitrogen gas displacement, the tar bur in metallic filter is eliminated clean and flue gas is all replaced with nitrogen gas so repeatedly with the flue gas in the metallic filter.
10. method for dust removal as claimed in claim 6, it is characterized in that: described catalyzer is selected from the W/USY catalyzer, the preparation method is: (1) is steeping fluid with the ammonium metatungstate solution, be carrier with USY, the USY carrier impregnation is adsorbed in the above-mentioned steeping fluid, leave standstill, after the drying, at 450-480 ℃ of roasting 5h; (2) vulcanize activation treatment in mixed atmosphere, the temperature of sulfuration activation is 350~390 ℃, and the time is 4-6 hour, and mixed atmosphere is for to count with volume ratio: H 2S: H 2=5: 95; (3) add binding agent in the powder that step (2) obtains, the spherical catalyst particle is made in extrusion forming, and wherein, the W charge capacity of described catalyzer is 3-7.5%.
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Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104017609A (en) * 2014-05-21 2014-09-03 梁鹏 Dry process purifying, cracking and fraction recovering device and process of coal pyrolysis gas
CN104073298A (en) * 2014-06-30 2014-10-01 中国天辰工程有限公司 Device and method for reducing content of ash in lignite gasification synthesis gas
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CN104606973A (en) * 2015-01-28 2015-05-13 邹炎 Filter bag type packed bed device for gas purification
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CN105885888A (en) * 2016-06-29 2016-08-24 北京神雾环境能源科技集团股份有限公司 Self-dedusting pyrolysis and cracking reactor
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WO2017202391A1 (en) * 2016-05-24 2017-11-30 河南龙成煤高效技术应用有限公司 High-temperature dust removal and filtering apparatus, high-temperature dust removal and filtering system, and continuous dust removal and filtering method
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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1478872A (en) * 2003-06-25 2004-03-03 中国科学院山西煤炭化学研究所 Integrated method and device of high temperature coal gas desulfur and dust removing
CN101020134A (en) * 2006-02-15 2007-08-22 中国科学院大连化学物理研究所 W-base catalyst and its prepn and application
WO2009136779A1 (en) * 2008-05-09 2009-11-12 Instituto Mexicano Del Petróleo Moderate-acidity catalyst for hydroprocessing of heavy crude and waste, and synthesis method therefor
CN101766941A (en) * 2008-12-30 2010-07-07 财团法人工业技术研究院 Filter for separating biomass oil gas and coke of biomass pyrolysis product
CN101880553A (en) * 2010-06-22 2010-11-10 沈阳航空航天大学 Integrated medium-high temperature coal gas purification method and device suitable for coal-based gas
US20110229276A1 (en) * 2008-10-23 2011-09-22 Thomas Eder Method and apparatus for separating particulate solids from a gas stream

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1478872A (en) * 2003-06-25 2004-03-03 中国科学院山西煤炭化学研究所 Integrated method and device of high temperature coal gas desulfur and dust removing
CN101020134A (en) * 2006-02-15 2007-08-22 中国科学院大连化学物理研究所 W-base catalyst and its prepn and application
WO2009136779A1 (en) * 2008-05-09 2009-11-12 Instituto Mexicano Del Petróleo Moderate-acidity catalyst for hydroprocessing of heavy crude and waste, and synthesis method therefor
US20110229276A1 (en) * 2008-10-23 2011-09-22 Thomas Eder Method and apparatus for separating particulate solids from a gas stream
CN101766941A (en) * 2008-12-30 2010-07-07 财团法人工业技术研究院 Filter for separating biomass oil gas and coke of biomass pyrolysis product
CN101880553A (en) * 2010-06-22 2010-11-10 沈阳航空航天大学 Integrated medium-high temperature coal gas purification method and device suitable for coal-based gas

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
张黎明: "LANKE高效工业气体除尘系统在催化裂化装置中的应用", 《石油化工设备》 *

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RU2707026C1 (en) * 2016-05-24 2019-11-21 Хэнань Дрэгон Инто Коул Текнолоджи Ко., Лтд. High-temperature device for removal and filtration of dust, high-temperature system for removal and filtration of dust and method for continuous removal and filtration of dust
US10981097B2 (en) 2016-05-24 2021-04-20 Henan Dragon Into Coal Technology Co., Ltd. High-temperature dust removal and filtering apparatus, high-temperature dust removal and filtering system, and continuous dust removal and filtering method
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