CN105771609A - Centrifugal spray tower - Google Patents

Centrifugal spray tower Download PDF

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Publication number
CN105771609A
CN105771609A CN201610323622.7A CN201610323622A CN105771609A CN 105771609 A CN105771609 A CN 105771609A CN 201610323622 A CN201610323622 A CN 201610323622A CN 105771609 A CN105771609 A CN 105771609A
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CN
China
Prior art keywords
housing
flue gas
absorbent
layer
impeller
Prior art date
Application number
CN201610323622.7A
Other languages
Chinese (zh)
Inventor
郝志刚
徐自功
刘仕期
Original Assignee
长沙深湘通用机器有限公司
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Priority to CN201610323622.7A priority Critical patent/CN105771609A/en
Publication of CN105771609A publication Critical patent/CN105771609A/en

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D45/00Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
    • B01D45/12Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces
    • B01D45/14Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces generated by rotating vanes, discs, drums or brushes
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/14Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
    • B01D53/1456Removing acid components
    • B01D53/1481Removing sulfur dioxide or sulfur trioxide
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/14Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
    • B01D53/18Absorbing units; Liquid distributors therefor
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/24Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by centrifugal force
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/26Drying gases or vapours
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/46Removing components of defined structure
    • B01D53/48Sulfur compounds
    • B01D53/50Sulfur oxides
    • B01D53/501Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
    • B01D53/504Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound characterised by a specific device
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/46Removing components of defined structure
    • B01D53/54Nitrogen compounds
    • B01D53/56Nitrogen oxides
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/46Removing components of defined structure
    • B01D53/60Simultaneously removing sulfur oxides and nitrogen oxides
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/46Removing components of defined structure
    • B01D53/64Heavy metals or compounds thereof, e.g. mercury
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/74General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/77Liquid phase processes
    • B01D53/79Injecting reactants
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2251/00Reactants
    • B01D2251/20Reductants
    • B01D2251/206Ammonium compounds
    • B01D2251/2062Ammonia
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2251/00Reactants
    • B01D2251/40Alkaline earth metal or magnesium compounds
    • B01D2251/404Alkaline earth metal or magnesium compounds of calcium
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2252/00Absorbents, i.e. solvents and liquid materials for gas absorption
    • B01D2252/10Inorganic absorbents
    • B01D2252/103Water
    • B01D2252/1035Sea water
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2258/00Sources of waste gases
    • B01D2258/02Other waste gases
    • B01D2258/0283Flue gases

Abstract

The invention discloses a centrifugal spray tower. The centrifugal spray tower comprises a shell, wherein a lower cavity is formed in the lower part of the shell; a flue gas inlet for flue gas to enter is formed at the lower cavity of the shell; the top of the shell is provided with a flue gas outlet for desulfurized flue gas to be discharged; the bottom of the shell is provided with a liquid outlet for discharging a reacted absorbent; spraying layers for spraying the absorbent to an inner cavity of the shell are arranged in the inner cavity of the shell; a rotating mechanism which is used for enabling the flue gas in the whole inner cavity of the shell to move at a high speed under the action of centrifugal force according to a spiral or rotational flowing track to increase the contact frequency and the contact strength of the flue gas and the absorbent is arranged at least one of the followings: at the upper part of the spraying layers, between the adjacent spraying layers and at the bottom of the spraying layers. According to the centrifugal spray tower disclosed by the invention, the size of the spray tower can be reduced, and the investment, the operation cost and the operation power can also be reduced; meanwhile, the effects of fast desulfurization, dust removal and the like can be achieved.

Description

Centrifugal spray
Technical field
The present invention relates to chemical industry, Thermal Power Generation Industry technical field of chemical reaction devices, especially, relate to the spray column of a kind of desulfurization, out of stock or other chemical reactions.
Background technology
Spray column (or claiming scrubbing tower) is applied in the industry such as chemical industry, thermal power plant, such as thermal power plant is introduce among spray column or scrubbing tower by the sulfur-containing smoke gas discharged in boiler for spray column or the scrubbing tower of desulfurization, the nozzle being provided with in tower is gone out desulfurizing agent and sulfur-containing smoke gas is sprayed or washs, desulfurizing agent is in the contact process with the flue gas of sulfur-bearing, desulfurizing agent produces chemical reaction with the sulfur in flue gas, produce Gypsum Fibrosum or ammonium sulfate etc., thus reaching to remove the sulfurous gas in flue gas.
Existing spray column has the disadvantage in that
1, spray column is thermal power plant or other chemical reaction towers equipment that cost is maximum in whole technique such as its desulfurization or denitration etc., energy consumption is maximum, and the course of reaction that flue gas is in tower must be moved by low flow velocity, the problem that the too high meeting of flow velocity causes reaction effect to reduce, and flow velocity also can require the integral diameter of reaction tower and the increase of height accordingly while of low, the amount of spray increases, and investment increase, the water that so can make consume big, energy consumption etc. and increases;
2, chemical reaction efficiency is not high, if needing to improve reaction efficiency, it is necessary to strengthen cost of investment and improve reaction condition, or additionally increase number of devices;
3, the effect of the dust removing effects of flue gas and dehumidifying is all poor.
Summary of the invention
The invention provides a kind of centrifugal spray, to solve the weak effect of the mass transfer of existing spray column, heat transfer or chemical reaction, reaction efficiency is low, the technical problem that volume is big, investment is big, energy expenditure is big, consumable accessory consumption is big etc..
The present invention provides a kind of centrifugal spray, including housing, the bottom of housing is lower cavity, the lower cavity place of housing is provided with the smoke inlet entered for flue gas, the top of housing is provided with the exhaust opening of the fume emission after for desulfurization, the bottom of housing is provided with the liquid outlet for discharging reacted absorbent, housing cavity is provided with the spraying layer for spraying absorbent to housing cavity, spraying layer top, between adjacent two spraying layers, at least one place in bottom spraying layer be provided with for make the flue gas of whole housing cavity under centrifugal action spirally or the rotating mechanism of the flow trace high-speed motion of eddy flow shape frequency of exposure and contact strength to increase flue gas and absorbent.
Further, being provided with the dehumidifying layer for flue gas dehumidifying in housing cavity, dehumidifying layer is in the top of spraying layer, and at least one place between the top of dehumidifying layer, adjacent two dehumidifying layers, in the bottom of dehumidifying layer is provided with rotating mechanism.
Further, rotating mechanism includes vertically being laid in housing cavity main shaft, be installed on main shaft and with main axis for make the flue gas of whole housing cavity under centrifugal action spirally or the flow trace high-speed motion of eddy flow shape to increase flue gas and the frequency of exposure of dehumidifying layer and absorbent and contact strength and not stay impeller contact dead angle and be located at that housing is outer and driving device for drive shaft rotation.
Further, impeller has multiple blade, and multiple blades are equidistantly laid along the circumference of main shaft.
Further, the laying mode of blade adopt along the radially extending of main shaft, adopt to tilt to the inlet end direction of housing, adopt blade to tilt to the direction, outlet side of housing at least one.
Further, impeller adopts plate blade or arc shaped blade.
Further, the blade of impeller offers the pressure reduction utilization rate for improving in blade path and promotes the air vent of fluid communication;The back of the body chamber of impeller offers and circumferentially along impeller and connects the pressure reduction utilization rate for improving impeller with air vent and promote the circumferential slot of fluid communication.
Further, the absorbent storage tank of spraying layer connection hull outside, absorbent storage tank connects spraying layer by delivery pump;The nozzle that spraying layer is provided with upward and/or lays down.
Further, the bending tubes end of smoke inlet is upwardly disposed, with the flue gas that prevents from entering in housing cavity along smoke inlet reverse flow.
Further, exhaust opening is communicated to activated carbon case.
Further, liquid outlet is communicated to dewatering system.
The method have the advantages that
Centrifugal spray of the present invention passes through to arrange rotating mechanism at least one region between adjacent two spraying layers, between adjacent dehumidifying layer and spraying layer, between adjacent two dehumidifying layers or bottom spraying layer, to change the flow of flue gas track in whole tower, make the flue gas in whole tower spirally or the flow trace of eddy flow shape moves, thus increasing flue gas and the frequency of exposure of dehumidify layer and absorbent and contact strength, to reach the purpose of quick and abundant reaction, and contacting between flue gas with dehumidifying layer and absorbent is made not stay contact dead angle.Flue gas quickly reacts through contacting with absorbent, when desulfurizing agent is agstone or ammonia thus generating Gypsum Fibrosum or the little granule of ammonium sulfate, these particulate matters, along with absorbent discharges housing cavity and carries out removing moisture filter collection, can become Gypsum Fibrosum or chemical fertilizer and be utilized.Flue gas quickly rotates especially reunites between fine dust so that dust and combines with adhesive Gypsum Fibrosum or ammonium sulfate and be prone to by collecting, particulate matter is also got rid of under powerful centrifugal action and is separated from flue gas to the inwall of spray column, thus strengthening the elimination of dust;The size of centrifugal spray can be reduced, reduce investment, reduce floor space, reduce operating cost and reduce and run power, it is possible to obtaining desulfurization rapidly, dedusting simultaneously and remove the effect of other heavy metal, the efficiency of desulfurization also significantly improves.When feeding ammonia in tower, can be simultaneously out of stock, namely remove NOx。These consumable goodss of absorbent can be reacted fully and be used, and utilization rate is high, thus that reduces absorbent and water makes consumption.Additionally more thorough at the exsiccation at dehumidifying layer place.
Except purpose described above, feature and advantage, the present invention also has other purpose, feature and advantage.Below with reference to accompanying drawings, the present invention is further detailed explanation.
Accompanying drawing explanation
The accompanying drawing constituting the part of the application is used for providing a further understanding of the present invention, and the schematic description and description of the present invention is used for explaining the present invention, is not intended that inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the structural representation of the centrifugal spray of the preferred embodiment of the present invention.
Marginal data:
1, housing;101, lower cavity;102, smoke inlet;103, exhaust opening;104, liquid outlet;2, spraying layer;201, nozzle;3, dehumidifying layer;4, rotating mechanism;401, main shaft;402, impeller;403, driving device.
Detailed description of the invention
Below in conjunction with accompanying drawing, embodiments of the invention are described in detail, but the present invention can be implemented by following the multitude of different ways limiting and covering.
Fig. 1 is the structural representation of the centrifugal spray of the preferred embodiment of the present invention.nullAs shown in Figure 1,The centrifugal spray of the present embodiment,Including housing 1,Housing 1 inner chamber bottom is the lower cavity 101 of the flue gas for converging entrance,The bottom of housing 1 is provided with the smoke inlet 102 of the lower cavity 101 entering housing 1 for flue gas,The top of housing 1 is provided with the exhaust opening 103 of the fume emission after for desulfurization,The bottom of housing 1 is provided with the liquid outlet 104 for discharging reacted absorbent,Housing 1 inner chamber is provided with for the spraying layer 2 to the housing 1 vaporific absorbent of inner chamber spray water,Spraying layer 2 top、Between adjacent two spraying layers 2、Bottom spraying layer 2、The top of dehumidifying layer 3、At least one place between dehumidifying layer 3 be provided with for make the flue gas of whole housing 1 inner chamber under centrifugal action spirally or the flow trace high-speed motion of eddy flow shape to increase flue gas and the frequency of exposure of dehumidify layer 3 and absorbent and contact strength and do not stay the rotating mechanism 4 contacting dead angle.And in FIG, on dehumidifying layer, between dehumidifying layer, between dehumidifying layer and spraying layer, between spraying layer, it is mounted on the impeller 402 of rotating mechanism 4.Centrifugal spray of the present invention passes through to arrange rotating mechanism at least one region between adjacent two spraying layers, between adjacent dehumidifying layer and spraying layer, between adjacent two dehumidifying layers, bottom spraying layer, to change the flow of flue gas track in whole tower, make the flue gas in whole tower spirally or the flow trace high-speed motion of eddy flow shape, thus increasing flue gas and the frequency of exposure of dehumidify layer and absorbent and contact strength, to reach the purpose of quick and abundant reaction, and contacting between flue gas with dehumidifying layer and absorbent is made not stay contact dead angle.Flue gas quickly reacts through contacting with absorbent, thus generating Gypsum Fibrosum or the little granule of ammonium sulfate, these granules, along with absorbent discharges housing cavity and carries out dewatering and filtering collection, can become Gypsum Fibrosum or chemical fertilizer and be utilized.Flue gas quickly rotates so that dust especially reunites between fine dust and adhesive Gypsum Fibrosum or ammonium sulfate combine and be prone to by collecting, particulate matter is also got rid of under the effect of powerful centrifugal force and is separated from flue gas to the inwall of spray column, thus strengthening the elimination of dust;The flue gas making high speed rotating makes the water droplet carried secretly in flue gas be easier to remove simultaneously;The size of centrifugal spray can be reduced, reduce investment, reduce operating cost and reduce and run power, it is possible to obtaining desulfurization rapidly, dedusting simultaneously and remove the effect of other heavy metal, the efficiency of desulfurization also significantly improves.When feeding ammonia in tower, can be simultaneously out of stock, namely remove NOx.These consumable goodss of absorbent can be reacted fully and be used, and utilization rate is high, thus reducing the consumption making consumption and water of absorbent.Also can be individually adapted to denitration reaction and out of stock and produce ammonium nitrate, or be applicable to other chemical reactions.
As it is shown in figure 1, in the present embodiment, housing 1 inner chamber is provided with the dehumidifying layer 3 for flue gas dehumidifying.Dehumidifying layer 3 is in the top of spraying layer 2.Dehumidifying layer 3 top, adjacent two dehumidifying layers 3 between, dehumidifying layer 3 bottom at least one place be provided with rotating mechanism 4.The foot of the lower cavity 101 of housing 1 is absorbent liquid storage tank.
As shown in Figure 1, in the present embodiment, main shaft 401 that rotating mechanism 4 includes vertically being laid in housing 1 inner chamber, be installed on main shaft 401 and with main shaft 401 rotate for make the flue gas of whole housing 1 inner chamber under centrifugal action spirally or the flow trace high-speed motion of eddy flow shape to increase flue gas and the frequency of exposure of dehumidifying layer 3 and absorbent and contact strength and not stay the impeller 402 contact dead angle and be located at that housing 1 is outer and driving device 403 for drive shaft 401 rotation.Rotating mechanism 4 includes: main shaft 401, and gas flow direction along housing 1 inner chamber is rotating is assemblied in housing 1 inner chamber;Impeller 402, it is installed on main shaft 401 and rotates the gas flow trace for changing in housing 1 inner chamber and movement velocity with main shaft 401, flue gas does the motion of helical form at a high speed or eddy flow shape around the jeting area and dehumidifying layer of each nozzle of spraying layer, so that flue gas is more with the frequency of exposure of absorbent and dehumidifying layer and contact strength more greatly and does not stay dead angle;And driving device 403, it is located at outside housing 1 and rotates for drive shaft 401.The output shaft of driving device 403 and main shaft 401 are coaxially arranged, or the output shaft of driving device 403 is perpendicular to main shaft 401 and arranges and pass through adaptor and connect and rotate with drive shaft 401.Utilizing driving device 403 to drive main shaft 401 to rotate, main shaft 401 impeller 402 rotates, and the flue gas stirred in housing 1 inner chamber mix with absorbent, thus in multiple times, react rapidly, dead angle is reacted in minimizing.Driving device 403 is placed in outside housing 1, thus reducing the mixing gas corrosion to driving device 403, thus improving the service life of driving device 403, and facilitates control and the maintenance of driving device 403.The bottom of main shaft 401 is fixed support also by the inner chamber of bearing Yu housing 1, to ensure rotating smoothly of main shaft 401.The output shaft of driving device 403 and main shaft 401 are coaxially arranged, or the output shaft of driving device 403 is perpendicular to main shaft 401 and arranges and pass through adaptor and connect and rotate with drive shaft 401.Different set-up modes can be selected, thus reducing space occupancy rate according to use environment and installation environment.
As it is shown in figure 1, in the present embodiment, impeller 402 has multiple blade.Multiple blades are equidistantly laid along the circumference of main shaft 401.Flue gas the quantity of blade can be selected, so that can fully contact with absorbent and fast reaction according to the size of area empty in housing 1 and flue gas flow.
As it is shown in figure 1, in the present embodiment, the laying mode of blade adopt along the radially extending of main shaft 401, adopt to tilt to the inlet end direction of housing 1, adopt blade to tilt to the direction, outlet side of housing 1 at least one.Flue gas the different laying angle of blade can be selected, so that can fully contact with absorbent and fast reaction according to the size of bulk in housing 1, flue gas flow and flue gas compounds content.
As it is shown in figure 1, in the present embodiment, impeller 402 adopts plate blade or arc shaped blade.The blade of impeller 402 adopts platy structure the central axis with main shaft 401, and at this moment flue gas does approximate pure contorted moving forward.At an angle, or blade shape structure in curved surface, at this moment flue gas not only moves forward the centrage of the blade of impeller 402 and reactor shell 1 with contorted, also forces flue gas rolling or in turbulence-like or in the axially-movable accelerated simultaneously.In housing 1 inner chamber, impeller 402 quickly rotates and can make flue gas and absorbent and more times ground intense contact of dehumidifier, and contactless dead angle so that the reaction with absorbent faster, more thoroughly, exhaustive, it is remarkably improved the efficiency of desulfurization, and makes the dry more thorough of reacted flue gas;Flue gas can also being made to pass through the speed of housing 1 inner chamber faster, thus being substantially reduced the size of housing 1 and the power of absorbent pumping, it is possible to reduce equipment investment, to reduce equipment operating cost and power consumption, meeting high-level environmental requirement simultaneously.
As it is shown in figure 1, in the present embodiment, the blade of impeller 402 offers the pressure reduction utilization rate for improving in blade path and promotes the air vent of fluid communication;And/or the back of the body chamber of impeller 402 offers and circumferentially along impeller 402 and connects the pressure reduction utilization rate for improving impeller 402 with air vent and promote the circumferential slot of fluid communication.Adopt the structure of air vent, by air vent, the flue gas fluid in peripheral region axially can be carried, the pressure reduction in blade path can be effectively utilized, promote the fluid communication between neighboring area and housing cavity, the operation stability of rotating mechanism can be effectively improved, do not result in bigger power and pressure ratio loss.Adopt the structure of circumferential slot, by circumferential slot, the flue gas fluid entered around impeller can be carried out circumferential transfer, the pressure reduction in blade path can be effectively utilized, promote the fluid communication between neighboring area and housing cavity, the operation stability of rotating mechanism can be effectively improved, do not result in bigger power and pressure ratio loss.Adopt the structure that circumferential slot combines with air vent, by circumferential slot, the flue gas fluid entered around impeller can not only be carried out circumferential transfer, by air vent and the back of the body chamber that circumferential slot is connected, the flue gas fluid in peripheral region axially can also be carried, the pressure reduction in blade path can be effectively utilized, promote the fluid communication between neighboring area and housing cavity, the operation stability of rotating mechanism can be effectively improved, do not result in bigger power and pressure ratio loss.
As shown in Figure 1, in the present embodiment, the pumping of spraying layer 2 absorbs liquid and can also pass through to connect the outside absorbent storage tank additionally arranged of housing 1, or liquid storage tank is no longer separately set in housing 1, to facilitate the allotment of absorbent, storage, reaction and to supplement in time, absorbent storage tank, by delivery pump connection spraying layer 2, facilitates the conveying of absorbent.The nozzle 201 that spraying layer 2 is provided with upward and/or lays down.Can according to the physical dimension of the conveying capacity of flue gas and centrifugal spray, select different nozzles towards so that absorbent can contact with rolling or in turbulence-like or in the flue gas of axially-movable accelerated in multiple times, and occur acutely, react fully.
As it is shown in figure 1, in the present embodiment, the bending tubes end of smoke inlet 102 is upwardly disposed, with the flue gas that prevents from entering in housing 1 inner chamber along smoke inlet 102 reverse flow.
In the present embodiment, exhaust opening 103 is communicated to activated carbon case.The flue gas of discharge further can be adsorbed, thus reducing the fume emission pollution to environment.
In the present embodiment, liquid outlet 104 is communicated to dewatering system.The liquid waste making discharge can pass through dehydration, and forms the materials such as the Gypsum Fibrosum that can reuse or fertilizer, thus reducing the pollution to environment, improves the recycling rate of waterused of garbage.
During enforcement, it is provided that a kind of centrifugal spray or scrubbing tower, in housing 1 inner chamber, set up rotary blade mechanism, referring to Fig. 1.The flue gas of sulfur-bearing enters housing 1 inner chamber from the bottom smoke inlet 102 of housing 1, and flue gas rises after entering the lower cavity 101 in housing 1 on top, and absorbent is pumped into housing 1 inner chamber by spraying layer 2, and sprays absorbent by nozzle 201.Space between nozzle 201 is built with impeller 402, and impeller 402 is contained on main shaft 401.Main shaft 401 is driven by driving device 403 and rotates, and the spraying layer 2 shown in Fig. 1 is two-layer, can be more than one layer or two-layer according to different situations.The nozzle 201 of each spraying layer 2 is uniformly distributed within the case 1.The upper strata of housing 1 inner chamber is additionally provided with dehumidifying layer 3.Having illustrated two-layer demister in Fig. 1, its function has been flue fog drip and the separation of part dust.In FIG, between demister, impeller 402 it is also equipped with.The top of housing 1 is equipped with driving device 403.After flue gas after desulfurization enters the upper space of housing 1 inner chamber, discharge from exhaust opening 103.
In the prior art, after flue gas enters from bottom, flue gas contacts with the absorbent of spray in the process risen and produces chemical reaction, the flow velocity of flue gas can not be too fast, otherwise will affect effect or the efficiency of its reaction, therefore the diameter of its spray column and height component need relatively big, and power consumption when thus making its investment and normal operation etc. is all high;And, in a bit of time in the arbitrary cross section in tower, flue gas is likely to the chance for once contacted with absorbent.And in centrifugal spray of the present invention, adopting in the inside of housing 1 can the impeller 402 of quick rotation, impeller 402 can make motion the moving up by relative low speeds of the prior art of flue gas, the air-flow of the high speed rotating become the motion of upwards quickly movement, just can have, for atwirl flue gas, the chance repeatedly carrying out contacting with absorbent, flue gas and absorbent contact can by original once, rotated by impeller 402, by several turns per minute, tens turns, hundreds of turns, the rotation of several thousand turns, the number of times making the chemical reaction of its contact increases to several times, tens times even more than hundreds of time, and this speed contacted with each other is higher, impact force is bigger, therefore the mass transfer of absorbent and flue gas, heat transfer and chemical reaction are fiercer, reaction effect is better.Owing to the frequency of exposure of absorbent Yu flue gas increases considerably, and impact when contacting or collision more acutely and reaction effect is better, make the better effects if such as mass transfer, heat transfer so on the one hand, the chemical reaction that another aspect is also in hgher efficiency.It addition, the external diameter of centrifugal spray and being highly all significantly reduced.
Within the specific limits, the rotating speed of impeller 402 is more high, the efficiency of reaction is more good, so just the cost of investment of centrifugal spray can be significantly reduced, investment and the power consumption of the outside corollary system of centrifugal spray can also be reduced, the quantity that such as can reduce pump and the model reducing pump are thus reducing investment and the power consumption of the pumping system of pumping absorbent, the pressure of blower fan and water consumption and also can reducing.
The form of impeller 402 can also be varied from, for instance the blade shape of impeller can be tabular the central axis with housing 1, and at this moment flue gas not only rotates, and its rolling can also be forced simultaneously to be in the situation of turbulent flow or quickening moves axially.
The effect of the impeller 402 between dehumidifying layer mainly strengthens dehumidifying layer except the effect of mist and collecting dust, especially particle dust.Under powerful centrifugal action, dust and water smoke and dehumidifying layer that is to say that the collision opportunity between demister and housing 1 inwall and between dust increases, so that droplet and dust are easier to by collecting.Impeller 402 between the nozzle 201 of spraying layer 2 equally also has the effect of collecting dust and minute dusts.In FIG, there are four groups of impellers 402 and two-layer spraying layer two-layer dehumidifying layer.Alternatively, one layer of spraying layer 2 or more multi-layered spraying layer 2 are adopted.Alternatively, dehumidifying layer 3 can also adopt one or more.Alternatively, impeller 402 can also adopt one or more.Alternatively, housing 1 can adopt vertical structure, it would however also be possible to employ horizontal type structure.Centrifugal spray can be centrifugal desulfurizing tower, centrifugal centrifugal chemical reactor or the centrifugal spray such as denitrating tower or other mass transfer, heat transfer.Absorbent (or reacting fluid) can be other gases or the fluids such as limestone, Calx, sea water, ammonia.In Fig. 1, flue gas and spray are single loop and adverse current work, it would however also be possible to employ double loop or multiple-loop structure, it is possible to adopt following current work, or change spray mode into mode of washing etc..
Centrifugal spray of the present invention, by increasing atwirl impeller 402, frequency of exposure between fluid can be controlled, and can greatly increase, additionally the intensity of its making contact is fiercer, and intensity increases, chemical reaction effect or efficiency not only can be made better faster, size or the volume of reaction unit can also be substantially reduced, reduce and run power and expense, thus notable investment reduction and operating cost.
Within the specific limits, reaction efficiency improves along with the rotating speed of impeller and improves rapidly.Such as, minimum discharge requirement for the desulphurization denitration of current thermal power plant, needing, double tower Two-way Cycle is set and can reach emission effect, after adopting the present invention, have only to the standard adopting the single column single cycle that tower diameter tower height is all less can reach discharge standard or requirements at the higher level.In FIG, the profile of housing 1 can be cylindric, it is possible to for polygon-shaped, so answers tower all can implement and be easy to manufacture for middle-size and small-size and large-scale sending out.
Owing to reaction effect is good, centrifugal reaction unit is made to less, thus can save great amount of investment.Such as, in the desulfurization reactor of thermal power plant, existing reaction tower or reactor size are very big, this makes not only investment big, and the pump output of absorbent is very big, after adopting the present invention, the diameter of desulfurizing tower can be designed to only small, the height of tower can also significantly reduce, in tower, the flow of the absorbent of ejection can also reduce, and water consumption reduces pressure and can also reduce, and the pressure of main air blower can also lower, pumping system can reduce or reduce model, and therefore operating cost can also significantly reduce.
Due to the effect of the impeller of high speed rotating in spraying layer and dehumidifying layer so that the seizure of grit especially minute dust is more, and effect on moisture extraction is better, it is possible to remove or reduce or reduce follow-up dust arrester installation and special dehydrating unit.
Due to the effect of the impeller of high speed rotating, fluid mass transfer in centrifugal reactor, heat transfer and chemical reaction etc. are comparatively fierce, and therefore less scaling or blocking can reduce or remove from the use of flushing water and the workload of maintenance down.
Present invention may apply to the reactor of multiple fluid, for instance among the various mass transfer such as desulfurizing tower, Benitration reactor, heat transfer and chemical reactor, applied widely.Its absorbent can be agstone, pulverized limestone, ammonia, sea water etc..
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.All within the spirit and principles in the present invention, any amendment of making, equivalent replacement, improvement etc., should be included within protection scope of the present invention.

Claims (10)

1. a centrifugal spray, including housing (1),
The bottom of described housing (1) is lower cavity (101),
Lower cavity (101) place of described housing (1) is provided with the smoke inlet (102) entered for flue gas,
The top of described housing (1) is provided with the exhaust opening (103) of the fume emission after for desulfurization,
The bottom of described housing (1) is provided with the liquid outlet (104) for discharging reacted absorbent,
Described housing (1) inner chamber is provided with the spraying layer (2) for spraying absorbent to described housing (1) inner chamber,
It is characterized in that,
At least one place between described spraying layer (2) top, spraying layer (2) described in adjacent two, in described spraying layer (2) bottom be provided with for make the flue gas of whole described housing (1) inner chamber under centrifugal action spirally or the rotating mechanism (4) of the flow trace high-speed motion of eddy flow shape frequency of exposure and contact strength to increase flue gas and absorbent.
2. centrifugal spray according to claim 1, it is characterised in that
Described housing (1) inner chamber is provided with the dehumidifying layer (3) for flue gas dehumidifying,
Described dehumidifying layer (3) is in the top of described spraying layer (2),
The top of described dehumidifying layer (3), at least one place described in adjacent two between dehumidifying layer (3), in the bottom of described dehumidifying layer (3) are provided with rotating mechanism (4).
3. centrifugal spray according to claim 2, it is characterised in that
Main shaft (401) that described rotating mechanism (4) includes vertically being laid in described housing (1) inner chamber, be installed in described main shaft (401) upper and rotate with described main shaft (401) be used for the flue gas making whole described housing (1) inner chamber under centrifugal action spirally or the flow trace high-speed motion of eddy flow shape to increase the frequency of exposure of flue gas and described dehumidifying layer (3) and absorbent and contact strength and not stay the impeller (402) contacting dead angle and be located at described housing (1) and outward and be used for the driving device (403) driving described main shaft (401) to rotate.
4. centrifugal spray according to claim 3, it is characterised in that
Described impeller (402) has multiple blade,
Multiple described blades are equidistantly laid along the circumference of described main shaft (401).
5. centrifugal spray according to claim 4, it is characterised in that
The laying mode of described blade adopts along the radially extending of described main shaft (401), adopts to tilt to the inlet end direction of described housing (1), adopts at least one in tilting to the direction, outlet side of described housing (1).
6. centrifugal spray according to claim 4, it is characterised in that
Described impeller (402) adopts plate blade or arc shaped blade.
7. centrifugal spray according to claim 3, it is characterised in that
The blade of described impeller (402) offers the pressure reduction utilization rate for improving in blade path and promotes the air vent of fluid communication;
The back of the body chamber of described impeller (402) offers and circumferentially along described impeller (402) and connects the pressure reduction utilization rate being used for improving described impeller (402) with air vent and promote the circumferential slot of fluid communication.
8. centrifugal spray according to any one of claim 1 to 7, it is characterised in that
Described spraying layer (2) connects the absorbent storage tank that described housing (1) is outside,
Described absorbent storage tank connects described spraying layer (2) by delivery pump;
The nozzle (201) that described spraying layer (2) is provided with upward and/or lays down.
9. centrifugal spray according to any one of claim 1 to 7, it is characterised in that
The bending tubes end of described smoke inlet (102) is upwardly disposed, with the flue gas that prevents from entering in described housing (1) inner chamber along described smoke inlet (102) reverse flow.
10. centrifugal spray according to any one of claim 1 to 7, it is characterised in that
Described exhaust opening (103) is communicated to activated carbon case.
CN201610323622.7A 2016-05-16 2016-05-16 Centrifugal spray tower CN105771609A (en)

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CN107371966A (en) * 2017-08-15 2017-11-24 贵州曌梅果蔬种植有限公司 A kind of walnut pest control method
CN107371966B (en) * 2017-08-15 2019-09-17 贵州曌梅果蔬种植有限公司 A kind of walnut pest control method
CN107349779A (en) * 2017-09-12 2017-11-17 浙江千尧环境工程有限公司 A kind of absorption tower
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