CN111054200A - Flue gas dry desulfurization device - Google Patents
Flue gas dry desulfurization device Download PDFInfo
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- CN111054200A CN111054200A CN202010019415.9A CN202010019415A CN111054200A CN 111054200 A CN111054200 A CN 111054200A CN 202010019415 A CN202010019415 A CN 202010019415A CN 111054200 A CN111054200 A CN 111054200A
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- reaction chamber
- flue gas
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation 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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/75—Multi-step processes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation 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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
- B01D53/501—Sulfur oxides by treating the gases with a solution or a suspension of an alkali or earth-alkali or ammonium compound
- B01D53/504—Sulfur 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation 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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/81—Solid phase processes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/40—Alkaline earth metal or magnesium compounds
- B01D2251/404—Alkaline earth metal or magnesium compounds of calcium
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/60—Inorganic bases or salts
- B01D2251/602—Oxides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/60—Inorganic bases or salts
- B01D2251/604—Hydroxides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/60—Inorganic bases or salts
- B01D2251/606—Carbonates
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D45/00—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces
- B01D45/12—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces
- B01D45/16—Separating dispersed particles from gases or vapours by gravity, inertia, or centrifugal forces by centrifugal forces generated by the winding course of the gas stream, the centrifugal forces being generated solely or partly by mechanical means, e.g. fixed swirl vanes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/02—Particle separators, e.g. dust precipitators, having hollow filters made of flexible material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D49/00—Separating dispersed particles from gases, air or vapours by other methods
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Abstract
The invention discloses a dry flue gas desulfurization device, and belongs to the field of flue gas purification. Including a flue gas dry desulphurization unit, grind reaction chamber, clean room, ash content circulating equipment and the pipe of discharging fume including advancing tobacco pipe, material warehousing and transportation cabinet, one-level venturi desulfurization reaction chamber, second grade, the bin outlet of material warehousing and transportation cabinet with advance the tobacco pipe intercommunication, advance the tobacco pipe and the inlet flue intercommunication of one-level venturi desulfurization reaction chamber, the inlet flue intercommunication of reaction chamber is ground with the second grade to the outlet flue of one-level venturi desulfurization reaction chamber, the inlet flue intercommunication of reaction chamber and clean room is ground to the outlet flue of second grade, the clean room top is equipped with the gas vent, and its below ash discharge mouth and ash content circulating equipment's ash discharge mouth intercommunication, ash content circulating equipment's ash discharge mouth and material warehousing and transportation cabinet's feed inlet intercommunication. The device has the advantages of reliable operation and convenient maintenance, improves the desulfurization efficiency and the utilization rate of the adsorbent to a certain extent, and effectively avoids the problems of hardening of the desulfurization adsorbent, dirty and blocked systems and the like.
Description
Technical Field
The invention relates to a dry flue gas desulfurization device, and belongs to the field of flue gas purification.
Background
SO in flue gas generated by combustion of fossil fuelxIs one of the main atmospheric pollutants. SO (SO)xAcid rain of the sulphate type can be formed in the atmosphere and can also cause serious damage to the respiratory system of humans and animals. Thus, against SOxThe problem of pollutant emission, environmental departments of various countries set up strict atmospheric pollution emission standards. 16 months in 2014, the Ministry of environmental protection of China formulated the emission standard of atmospheric pollutants for boilers, which was stated from 1 month in 7 months in 2014, in the flue gas generated by newly-built coal-fired boilersxThe content of (A) is not more than 200mg/m3. To further reduce SOxThe discharge of (2) has come out of more strict local standards in various regions in the country. 6 and 7 days in 2018, Shanghai City issued "emission Standard of boiler pollutants", which stipulates that SO in flue gas generated by combustion of gaseous fuel boiler in Shanghai City range from 10 and 1 days in 2020xThe content of (A) is not more than 10mg/m3. In order to satisfy the requirement of SO for peoplexThe ultra-low emission requirement requires the development of a new high-efficiency flue gas desulfurization technology and a new process.
Currently, the flue gas desulfurization technologies mainly adopted by people include wet scrubbing technology, semi-dry desulfurization technology, dry desulfurization technology and the like. The wet washing technology has a good desulfurization effect, but a large amount of absorbent is consumed in the wet washing process, the treatment of washing waste liquid is difficult, and secondary pollution is easily caused; the semi-dry desulfurization technique relates to gas, liquid,The solid-three phase mass transfer reaction has a complex system and higher requirement on the operation control level, and if too much desulfurizer is sprayed, the equipment is seriously corroded, and the wall wetting phenomenon occurs; the dry desulfurization technology adopts dry powder or particles as a desulfurizing agent to remove SO in flue gasxThe reaction product is also a dry substance after adsorption treatment, and the process has the advantages of simple system, low cost, no secondary pollution and the like, so that the technology is increasingly applied to the aspect of flue gas desulfurization in recent years.
Patent flue gas dry desulfurization device and desulfurization system (CN209205028U), a novel high-efficient pure dry desulfurization dust pelletizing system (CN206082150U) mainly disclose a flue gas dry desulfurization system, but the grinder in this kind of system only is used for grinding the desulfurizer to predetermined particle size before the desulfurization reaction begins, can't update the adsorbent in the desulfurization reaction process, and desulfurization efficiency improves with the utilization ratio limitedly, can't effectively avoid the dirty stifled scheduling problem of system among the desulfurization reaction process moreover.
Although the prior dry desulfurization technology can simultaneously remove SO in the flue gasxAnd particulate matters, the desulfurization efficiency and the utilization rate of the adsorbent are relatively low, and the phenomenon of hardening of the desulfurization adsorbent is easy to occur in the device, which leads to the overhigh cost of the dry desulfurization process in the aspects of equipment investment, maintenance, operation and the like, and limits the large-scale commercial application of the related process. Therefore, how to effectively reduce the occurrence of the dirty blocking phenomenon of the desulfurizer in the flue gas desulfurization process on the premise of ensuring the desulfurization effect is a key problem for promoting the industrial application of the flue gas dry desulfurization technology.
Disclosure of Invention
Aiming at the problems of hardening and scaling of a desulfurizer and the like in the operation process of the conventional dry desulfurization device, the invention provides the flue gas dry desulfurization device, which can well solve the problem of dirty and blocked desulfurization adsorbent and can improve the desulfurization efficiency and the utilization rate of the adsorbent.
In order to achieve the purpose, the invention adopts the following technical scheme: the utility model provides a flue gas dry desulphurization unit, includes material warehousing and transportation cabinet, the bin outlet of material warehousing and transportation cabinet bottom passes through the tube coupling on the non-both sides port of advancing the tobacco pipe, the one end and the pending flue gas jar of advancing the tobacco pipe are connected, and the other end that advances the tobacco pipe communicates with the inlet flue of one-level venturi desulfurization reaction chamber side bottom, the inlet flue of reaction chamber is ground through pipeline and second grade to the outlet flue of one-level venturi desulfurization reaction chamber side top is connected, the inlet flue of reaction chamber is ground through the pipeline to the second grade is connected with the inlet flue at dust removal chamber side top, the dust removal chamber top is equipped with the pipe of discharging fume, and the dust removal chamber bottom is connected with ash inlet of ash content circulating equipment, ash content circulating equipment's ash discharge mouth passes through the pipeline and is connected with the feed inlet at material warehousing and transportation cabinet top.
Further, the secondary grinding reaction chamber is a reaction chamber filled with grinding balls, and the grinding balls include but are not limited to alumina ceramic balls, zirconia balls and silicon carbide balls.
Further, the particle size of the grinding balls is 3-8 mm, and the filling rate of the grinding balls is not lower than 60%.
Furthermore, a screen is arranged on the side face, close to the secondary grinding reaction chamber of the dust removal chamber, of the secondary grinding reaction chamber, and the aperture of the screen is 500-800 meshes.
Further, a desulfurization adsorbent is stored in the material storage and transportation cabinet, and the desulfurization adsorbent includes but is not limited to one or two or more of calcium oxide powder, calcium hydroxide powder and sodium bicarbonate powder.
Further, material conveyors are arranged inside the material storage and transportation cabinet and the ash circulation equipment, the material conveyors of the material storage and transportation cabinet and the ash circulation equipment can be the same or different, and the material conveyors include but are not limited to screw conveyors and pneumatic conveyors.
Further, the dust chamber includes, but is not limited to, a bag dust collector, an electrostatic dust collector, a cyclone dust collector.
Advantageous effects of the invention
1. The problems of dirty blocking, hardening and the like of a desulphurization adsorbent in the device are effectively avoided, the overall stability is good, the operation is reliable, and the maintenance is convenient;
2. the desulfurization efficiency and the utilization rate of the adsorbent are remarkably improved, when the calcium-sulfur ratio is 1.5, the desulfurization efficiency and the utilization rate can be respectively improved by 20 percent and 30 percent to the maximum extent, the running cost of the device is greatly reduced, and the economical efficiency of the process is improved;
3. the raw material is a common desulfurizer with relatively large particle size, is convenient to store and transport, and greatly reduces the purchase and transportation cost of the raw material.
Drawings
FIG. 1 is a schematic diagram of a flue gas dry desulfurization device of the present invention.
In the figure, 1, a material storage and transportation cabinet, 2, a first-stage Venturi desulfurization reaction chamber, 3, a second-stage grinding reaction chamber, 4, a dust removal chamber, 5, ash circulation equipment, 6, a smoke inlet pipe, 7 and a smoke exhaust pipe.
Detailed Description
The following non-limiting examples will allow one of ordinary skill in the art to more fully understand the present invention, but are not intended to limit the invention in any way.
In order to better illustrate the present invention and facilitate the understanding of the technical solutions of the present invention, the technical solutions in the preferred embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. The following examples are only representative of some embodiments of the present invention and do not represent or limit the scope of the present invention, which is defined by the claims.
Example 1
As shown in fig. 1, a flue gas dry desulphurization unit, including material warehousing and transportation cabinet 1, the bin outlet of material warehousing and transportation cabinet 1 bottom passes through the tube coupling on advancing tobacco pipe 6, the one end of advancing tobacco pipe 6 is connected with the flue gas jar of treating, advances the other end of tobacco pipe 6 and the entering smoke mouth intercommunication of 2 side bottoms of one-level venturi desulfurization reaction chamber, the exhaust port at 2 side tops of one-level venturi desulfurization reaction chamber passes through the pipeline and is connected with the entering smoke mouth of second grade grinding reaction chamber 3, the exhaust port of second grade grinding reaction chamber 3 passes through the pipeline and is connected with the entering smoke mouth at 6 side tops of clean room, 6 tops of clean room are equipped with smoke pipe 7, and clean room 4 bottoms are connected with ash inlet of ash content circulating equipment 5, ash outlet of ash content circulating equipment 5 passes through the pipeline and is connected with the feed inlet at material warehousing and transportation cabinet 1 top.
The second-stage grinding reaction chamber 3 is a reaction chamber filled with grinding balls, and the grinding balls comprise alumina ceramic balls, zirconia balls and silicon carbide balls. The particle size of the grinding balls is 3-8 mm, and the filling rate of the grinding balls is not lower than 60%. And a screen is arranged on the side surface of the secondary grinding reaction chamber 3 close to the dust removal chamber 4, and the aperture of the screen is 500-800 meshes. The material storage and transportation cabinet 1 is internally provided with a desulfurization adsorbent, and the desulfurization adsorbent comprises one or more than two of calcium oxide powder, calcium hydroxide powder and sodium bicarbonate powder. The material storage and transportation cabinet 1 and the ash circulation equipment 5 are internally provided with material conveyors, the material conveyors of the material storage and transportation cabinet 1 and the ash circulation equipment 5 can be the same or different, and the material conveyors comprise screw conveyors and pneumatic conveyors. The dust chamber 4 comprises a bag-type dust collector, an electrostatic dust collector and a cyclone dust collector.
Example 2
The device can remove gas component SO from the flue gasxAnd particulate matter and the like, and the steps of using the device of the invention are as follows:
a) the flue gas in the flue gas tank to be treated enters the smoke inlet pipe 6 and contacts with the desulfurization adsorbent conveyed to the smoke inlet pipe 6 by the material storage and transportation cabinet 1, and then the flue gas entrains the adsorbent and enters the first-stage Venturi desulfurization reaction chamber 2;
b) after the flue gas wrapped with the desulfurization adsorbent enters the primary venturi desulfurization reaction chamber 2, the flue gas is fully charged in the primary venturi desulfurization reaction chamber 2 for contact reaction, and the retention time is more than 2 s;
c) the flue gas wrapped desulfurization adsorbent enters a smoke inlet at the bottom of a primary Venturi desulfurization reaction chamber 2 and is discharged into a secondary grinding reaction chamber 3 from a smoke outlet at the top, a large number of grinding balls are densely filled in the secondary grinding reaction chamber 3, a screen mesh with 500-800 meshes is assembled on the side surface of the secondary grinding reaction chamber 3 close to one side of a dust removal chamber, the desulfurization adsorbent with larger particle size can be ground and screened into desulfurization fine powder with smaller particle size, the contact area of gas-solid two-phase reaction is increased, the desulfurization reaction rate is improved, the reacted adsorbent also obtains surface updating from the above, and the desulfurization adsorbent continuously reacts with the flue gas in the secondary grinding reaction chamber 3;
d) the flue gas after the reaction in the secondary grinding reaction chamber 3 enters a dust removal chamber 4, the fully ground fine desulfurization powder is screened and collected in the dust removal chamber, and is deposited with pollutants such as particulate matters at the bottom of the dust removal chamber 4, and then enters an ash circulation device 5;
e) the clean flue gas is discharged from a smoke discharge pipe 7 at the top of the dust removal chamber 4, pollutants in the ash circulating equipment 5 enter the material storage and transportation cabinet 1 again through a pipeline, and the flue gas is repeatedly circulated to realize flue gas desulfurization.
Compared with the device in the prior art, the device can well solve the problem of dirty and blocked desulfurization adsorbent, can improve the desulfurization efficiency and utilization rate of the adsorbent, and can greatly reduce the operation cost of the whole device, thereby improving the economical efficiency of the process.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (7)
1. A dry flue gas desulfurization device is characterized by comprising a material storage and transportation cabinet (1), the discharge port at the bottom of the material storage and transportation cabinet (1) is connected with the ports on the two sides of the smoke inlet pipe (6) through a pipeline, one end of the smoke inlet pipe (6) is connected with the smoke tank to be treated, the other end of the smoke inlet pipe (6) is communicated with a smoke inlet at the bottom of the side surface of the primary Venturi desulfurization reaction chamber (2), the smoke outlet at the top of the side surface of the primary Venturi desulfurization reaction chamber (2) is connected with the smoke inlet of the secondary grinding reaction chamber (3) through a pipeline, the smoke outlet of the secondary grinding reaction chamber (3) is connected with the smoke inlet at the top of the side surface of the dust removal chamber (6) through a pipeline, the top of the dust chamber (6) is provided with a smoke exhaust pipe (7), the bottom of the dust chamber (4) is connected with an ash inlet of an ash circulating device (5), and an ash discharge port of the ash circulation equipment (5) is connected with a feed port at the top of the material storage and transportation cabinet (1) through a pipeline.
2. The dry flue gas desulfurization device according to claim 1, characterized in that the secondary grinding reaction chamber (3) is a reaction chamber filled with grinding balls, and the grinding balls comprise alumina ceramic balls, zirconia balls and silicon carbide balls.
3. The dry flue gas desulfurization device according to claim 2, wherein the grinding balls have a particle size of 3-8 mm, and a packing rate of the grinding balls is not less than 60%.
4. The dry flue gas desulfurization device according to claim 1, characterized in that a screen is disposed on the side of the secondary grinding reaction chamber (3) close to the dust removal chamber (4), and the aperture of the screen is 500-800 mesh.
5. The dry flue gas desulfurization device according to claim 1, wherein the material storage and transportation cabinet (1) stores a desulfurization adsorbent therein, and the desulfurization adsorbent comprises one or two or more of calcium oxide powder, calcium hydroxide powder and sodium bicarbonate powder.
6. The dry flue gas desulfurization device according to claim 1, characterized in that material conveyors are arranged inside the material storage and transportation cabinet (1) and the ash recycling equipment (5), the material conveyors of the material storage and transportation cabinet (1) and the ash recycling equipment (5) can be the same or different, and the material conveyors include screw conveyors and pneumatic conveyors.
7. The dry flue gas desulfurization device according to claim 1, characterized in that the dust chamber (4) comprises a bag-type dust collector, an electrostatic precipitator, a cyclone.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010019415.9A CN111054200A (en) | 2020-01-08 | 2020-01-08 | Flue gas dry desulfurization device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010019415.9A CN111054200A (en) | 2020-01-08 | 2020-01-08 | Flue gas dry desulfurization device |
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| CN111054200A true CN111054200A (en) | 2020-04-24 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115246735A (en) * | 2022-08-01 | 2022-10-28 | 河北浩锐陶瓷制品有限公司 | Production process of energy-saving environment-friendly ceramic tile |
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2020
- 2020-01-08 CN CN202010019415.9A patent/CN111054200A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115246735A (en) * | 2022-08-01 | 2022-10-28 | 河北浩锐陶瓷制品有限公司 | Production process of energy-saving environment-friendly ceramic tile |
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