CN210584463U - A device that is used for CDQ pressure to adjust scattered gas desulfurization and dust removal - Google Patents
A device that is used for CDQ pressure to adjust scattered gas desulfurization and dust removal Download PDFInfo
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- CN210584463U CN210584463U CN201920820683.3U CN201920820683U CN210584463U CN 210584463 U CN210584463 U CN 210584463U CN 201920820683 U CN201920820683 U CN 201920820683U CN 210584463 U CN210584463 U CN 210584463U
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Abstract
The utility model discloses a device that is used for CDQ pressure adjustment diffuse gas desulfurization to remove dust, grind machine, conveying fan, one-level dust remover, desulfurization reactor, second grade dust remover and draught fan including sodium bicarbonate hopper, screw conveyer, sodium bicarbonate. The diffused gas is discharged from the diffusing port through a pipeline and enters a primary dust remover for dust removal, the diffused gas after dust removal and the ground sodium bicarbonate ultrafine powder enter a desulfurization reactor through a Venturi, the diffused gas and the sodium bicarbonate ultrafine powder are uniformly mixed in the reactor and carry out chemical reaction, and the flue gas after desulfurization enters a chimney through secondary dust removal and an induced draft fan for discharge. The utility model discloses the device adopts baking soda dry desulfurization + the high-efficient dust removal principle design of second grade, SO2 and dust in the flue gas of effective desorption, and the flue gas after guaranteeing to handle satisfies latest national emission limit value standard very much.
Description
Technical Field
The utility model relates to an adopt flue gas processing apparatus of baking soda dry process desulfurization + second grade dust removal effectively solves the CDQ and diffuses gas desulfurization dust removal problem, belongs to the metallurgical production environmental protection field of steel.
Background
In the face of increasingly severe atmospheric pollution situation, the execution of new environmental protection law is continuously strengthened, local standards are continuously improved, the coking industry is strongly promoted to produce capacity by using environmental standards and energy consumption standards, whether the environmental protection reaches the standard or not becomes a necessary condition for determining the survival of enterprises, and at present, a plurality of steel enterprises implement or have put forward schedules for the treatment of the coke oven flue gas. In the past, CDQ pressure adjustment diffused gas, pre-storage chamber diffused gas, coke discharging device smoke, dust collection air of a coke conveying system transfer station and the like are mixed and then enter a ground dust removal station, and dust is directly discharged through a chimney after being removed. SO in the diffused gas is adjusted due to CDQ pressure2The content and the dust content seriously exceed the standard, and the desulfurization and dust removal treatment must be carried out independently. So far, domestic coking enterprises develop little work on the treatment of the gas.
Disclosure of Invention
An object of the utility model is to provide a device that is used for CDQ pressure to adjust scattered gas desulfurization and removes dust adopts the principle design of sodium bicarbonate dry process desulfurization + second grade dust removal, effectively reduces SO2And dust emission, so that the treated flue gas meets the latest national special emission limit standard.
The utility model discloses specifically adopt following technical scheme:
the device for desulfurizing and dedusting the CDQ pressure-regulated diffused gas is characterized by comprising a baking soda grinding system, a desulfurization reaction system and a dedusting system; the baking soda grinding system is connected with the desulfurization reaction system, and baking soda raw materials are ground into baking soda ultra-fine powder and then sent into the desulfurization reaction system; the dust removal system comprises a primary dust remover and a secondary dust remover; the primary dust remover is connected to the inlet end of the desulfurization reaction system, and is used for performing primary dust removal on CDQ diffused gas and then sending the CDQ diffused gas into the desulfurization reaction system; and the secondary dust remover is connected to the outlet end of the desulfurization reaction system, and is used for carrying out secondary dust removal on the diffused gas after desulfurization reaction and then sending the diffused gas into a chimney for emission.
Preferably, the baking soda grinding system comprises a hopper, a screw conveyor, a feeding pipe, a grinder and a conveying fan; the hopper is connected with the screw conveyor, the screw conveyor is connected with the grinding machine through the discharging pipe, and the grinding machine is connected with an air inlet and an air outlet pipeline; the air outlet pipeline is connected with an inlet of a conveying fan, and an outlet pipeline of the conveying fan is connected to a powder inlet of the desulfurization reaction system.
Preferably, the desulfurization reaction system comprises a venturi and a desulfurization reactor; the air inlet of the venturi is connected with the diffused air outlet of the primary dust remover, the powder inlet of the venturi is connected with the outlet of the baking soda grinding system, the outlet of the venturi is connected with the inlet of the desulfurization reactor, and the outlet of the desulfurization reactor is connected with the flue gas inlet pipeline of the secondary dust remover.
The utility model discloses following beneficial effect has:
(1) the device adopts the dry desulphurization of sodium bicarbonate and the two-stage dust removal principle design, and can effectively reduce SO2And dust emission, so that the treated flue gas meets the latest national special emission limit standard. And the dry desulfurization has no wastewater, the temperature drop of the system is very small, and the dry desulfurization has no corrosion influence on a flue and a chimney.
(2) The desulfurization reaction system adopts a two-stage dust remover to carry out secondary dust removal on CDQ diffused gas, the CDQ fly ash can be collected by the primary dust removal for resource recycling, the desulfurization by-products carried by the diffused gas are removed by the secondary dust removal, unreacted dry desulfurizing agent forms a filter cake on a cloth bag of the dust remover, and SO is further removed2And the desulfurization efficiency and the dust emission standard are ensured.
(3) The inlet of the desulfurization reactor is connected with a venturi, and the characteristics of high flow velocity and negative pressure at the gradually-expanding section of the venturi throat are utilized to ensure that dry desulfurizing agent (sodium bicarbonate ultra-fine powder) and diffused gas are fully mixed and then enter the reactor for reaction, the flow field in the reactor is uniformly distributed, the residence time of flue gas is ensured to be more than 3s, the desulfurization efficiency is ensured, the structure is simple, the resistance is reduced, and the energy consumption of a system is low.
(4) A flue damper is arranged on a CDQ diffused gas inlet pipeline of the primary dust remover, and the negative pressure in the reactor is ensured by controlling the opening degree of the diffused gas flue damper. An air charging valve is arranged in the middle of the desulfurization reactor, so that the oxygen content in the flue gas can be adjusted to the oxygen content required by the sodium bicarbonate reaction.
(5) Adopt the utility model discloses desulfurization dust collector, desulfurization efficiency > 95%, SO after the desulfurization is handled2Emission concentration < 50mg/Nm3Dust emission concentration is less than 10mg/Nm3Completely meets the latest national special emission limit standard.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
In the figure: 1. a hopper; 2. a screw conveyor; 3. a discharging pipe; 4. a grinder; 5. an air inlet; 6. an air outlet pipeline; 7. a conveying fan; 8. an outlet pipeline of the conveying fan; a CDQ purge gas inlet line; 10. a primary dust remover; a CDQ fly ash recycling pipeline; 12. a diffused gas outlet pipeline of the primary dust remover; 13. a reactor outlet flue; 14. a desulfurization reactor; 15. a venturi; 16. a secondary dust remover; 17. a byproduct outward transport pipeline; 18. an inlet flue of the induced draft fan; 19. an induced draft fan; 20. and (3) entering a chimney discharge pipeline, 21. a flue damper, 22. an air charging valve.
Detailed Description
In order to make the technical solution of the present patent better understood by those skilled in the art, the present patent is further described in detail with reference to the accompanying drawings and preferred embodiments.
As shown in figure 1, the device for desulfurizing and dedusting the CDQ pressure-regulated diffused gas mainly comprises a hopper 1, a screw conveyor 2, a baking soda grinder 4, a conveying fan 7, a primary deduster 10, a Venturi 15, a desulfurization reactor 14, a secondary deduster 16 and an induced draft fan 19. Sodium bicarbonate raw material (feeding particle size is less than 10 mm) enters into hopper 1, and is conveyed to grinder 4 by screw conveyer 2 for grinding, sodium bicarbonate ultra-fine powder (particle size is less than 30 μm (90 wt%)) meeting the particle size requirement is conveyed to venturi 15 throat gradually-expanding section by conveying fan 7, and is subjected to primary dust removalThe diffused gas is mixed and then enters a reactor 14, and the superfine sodium bicarbonate powder is decomposed into porous high-activity sodium carbonate and carbon dioxide and high-activity Na under the action of high-temperature flue gas2CO3With SO in the diffused gas2A chemical reaction takes place. The desulfurized diffused gas carries powdery particle products to enter a secondary dust remover 16, and the clean diffused gas after dust removal enters a chimney through an induced draft fan 19 to be discharged.
The whole device can be divided into three parts: baking soda grinding system, desulfurization reaction system and dust pelletizing system.
The baking soda grinding system comprises a baking soda hopper 1, a screw conveyor 2, a discharging pipe 3, a baking soda grinder 4 and a conveying fan 7. Hopper 1 is connected with screw conveyer 2, and screw conveyer 2 is connected with grinding machine 4 through unloading pipe 3, is connected with air intake 5 and air-out pipeline 6 on the grinding machine 4. An air outlet pipeline 6 is connected with an inlet of a conveying fan 7, an outlet pipeline 8 of the conveying fan is connected with a powder inlet at the gradually expanding section of the Venturi 15 throat, and the ground sodium bicarbonate ultra-fine powder is conveyed into a desulfurization reactor 14 through high-flow-rate diffused gas at the gradually expanding section of the Venturi 15 throat.
The desulfurization reaction system comprises a venturi 15, a desulfurization reactor 14 and a reactor outlet flue 13. The air inlet of the venturi 15 is connected with a diffused air outlet pipeline 12 of the primary dust remover 10, the powder inlet at the throat gradually-expanding section is connected with an outlet pipeline 8 of the conveying fan, the outlet of the venturi 15 is connected with the inlet of the desulfurization reactor 14, and the outlet flue 13 of the reactor is connected with a flue gas inlet pipeline of the secondary dust remover 16. The diffused gas after primary dust removal and the baking soda superfine powder are fully mixed by a Venturi and then enter a desulfurization reactor for reaction, and the residence time of the flue gas in the desulfurization reactor is more than 3 s. The venturi 15 utilizes the characteristics of high flow speed and negative pressure at the divergent section of the venturi throat to uniformly distribute the baking soda in the reactor, thereby ensuring the desulfurization efficiency. The flow velocity at the venturi throat is designed to be 30-40 m/s.
The dust removal system includes a primary dust remover 10 and a secondary dust remover 16. CDQ diffused gas is connected with a smoke inlet of a primary dust remover 10 from a diffusing port through a CDQ diffused gas inlet pipeline 9, a diffused gas outlet pipeline 12 of the primary dust remover 10 is connected with a gas inlet of an inlet section of a Venturi 15, and collected CDQ fly ash is conveyed through a pipeline 11 to be used for blending coking or other purposes. The inlet of the secondary dust remover 16 is connected with the outlet flue 13 of the reactor, and the outlet is connected with the inlet flue 18 of the induced draft fan. The secondary dust removal is mainly used for removing desulfurization byproduct particles carried by the diffused gas, the clean diffused gas enters a chimney through a draught fan to be discharged after reaching standards, and the collected desulfurization byproducts (mainly sodium sulfate and sodium carbonate) are transported out through a byproduct transporting pipeline 17 to be used as other places.
The CDQ diffused gas inlet pipeline 9 of the primary dust remover 10 is provided with a flue damper 21, and the negative pressure in the reactor can be ensured by controlling the opening degree of the flue damper 21. An air charging valve 22 is arranged in the middle of the desulfurization reactor 14, so that the oxygen content in the flue gas can be adjusted to the oxygen content required by the baking soda reaction.
In the embodiment, the CDQ diffused gas intake port is arranged at the outlet (the front section of the auxiliary economizer) of the CDQ dry quenching circulating fan, so that the flue gas temperature is favorably improved, and the desulfurization reaction efficiency is ensured.
The foregoing is only a preferred embodiment of this patent and is not intended to limit the patent in any way. In other embodiments of the present invention, the number of the dust collectors and the amount of the desulfurizing agent to be added can be flexibly adjusted according to the flue gas conditions.
Any simple modification, equivalent replacement and improvement made to the above embodiments without departing from the principle and technical scope of the patent still fall within the protection scope of the technical scheme of the patent.
Claims (9)
1. The device for desulfurizing and dedusting the CDQ pressure-regulated diffused gas is characterized by comprising a baking soda grinding system, a desulfurization reaction system and a dedusting system; the baking soda grinding system is connected with the desulfurization reaction system, and baking soda raw materials are ground into baking soda ultra-fine powder and then sent into the desulfurization reaction system; the dust removal system comprises a primary dust remover and a secondary dust remover; the primary dust remover is connected to the inlet end of the desulfurization reaction system, and is used for performing primary dust removal on CDQ diffused gas and then sending the CDQ diffused gas into the desulfurization reaction system; and the secondary dust remover is connected to the outlet end of the desulfurization reaction system, and is used for carrying out secondary dust removal on the diffused gas after desulfurization reaction and then sending the diffused gas into a chimney for emission.
2. The apparatus for CDQ pressure regulated purge gas desulfurization dust removal according to claim 1, characterized in that the baking soda milling system comprises a hopper (1), a screw conveyor (2), a blanking pipe (3), a mill (4) and a conveyor fan (7); the hopper (1) is connected with the spiral conveyor (2), the spiral conveyor (2) is connected with the grinding machine (4) through the discharging pipe (3), and the grinding machine (4) is connected with the air inlet (5) and the air outlet pipeline (6); the air outlet pipeline (6) is connected with an inlet of a conveying fan (7), and an outlet pipeline (8) of the conveying fan is connected to a powder inlet of the desulfurization reaction system.
3. The apparatus for the desulfurization and dust removal of CDQ pressure-regulated purge gas according to claim 1, characterized in that said desulfurization reaction system comprises a venturi (15) and a desulfurization reactor (14); the air inlet of the venturi (15) is connected with the outlet of the diffused air of the primary dust remover, the powder inlet at the throat gradually-expanding section of the venturi (15) is connected with the outlet of the baking soda grinding system, the outlet of the venturi (15) is connected with the inlet of the desulfurization reactor (14), and the outlet of the desulfurization reactor (14) is connected with the flue gas inlet of the secondary dust remover (16).
4. The device for desulfurization and dust removal of CDQ pressure-regulated purge gas according to claim 3, characterized in that the flow velocity at the throat of the venturi (15) is 30-40 m/s.
5. The apparatus for desulfurization and dust removal of CDQ pressure-regulated purge gas according to claim 3, characterized in that a charge valve (22) is provided in the middle of the desulfurization reactor (14).
6. The device for the desulfurization and the dust removal of the CDQ pressure-regulated dispersion gas according to claim 3, characterized in that the dispersion gas after the primary dust removal and the baking soda ultra-fine powder are fully mixed by the Venturi (15) and then enter the desulfurization reactor (14) for reaction, and the residence time of the flue gas in the desulfurization reactor (14) is more than 3 s.
7. The apparatus for desulfurization and dust removal of CDQ pressure-regulated purge gas according to claim 1, wherein the CDQ purge gas inlet pipe (9) of the primary dust collector is provided with a flue damper (21).
8. The device for desulfurization and dust removal of CDQ pressure regulated purge gas according to claim 1, wherein the CDQ purge gas intake port is provided at the outlet of the CDQ dry quenching circulating fan at the front section of the secondary economizer.
9. The apparatus for desulfurization and dust removal of CDQ pressure-regulated purge gas according to claim 1, wherein the raw material size of baking soda is < 10mm, the superfine powder size of baking soda is < 30 μm, and the superfine powder of baking soda is 90% by weight.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920820683.3U CN210584463U (en) | 2019-06-03 | 2019-06-03 | A device that is used for CDQ pressure to adjust scattered gas desulfurization and dust removal |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920820683.3U CN210584463U (en) | 2019-06-03 | 2019-06-03 | A device that is used for CDQ pressure to adjust scattered gas desulfurization and dust removal |
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| CN210584463U true CN210584463U (en) | 2020-05-22 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110280124A (en) * | 2019-06-03 | 2019-09-27 | 江苏智道工程技术有限公司 | A kind of system adjusting dispersing gas desulfurization and dedusting for CDQ pressure |
| CN111889219A (en) * | 2020-07-24 | 2020-11-06 | 圣米尔斯科技(深圳)有限公司 | Mill with pressure difference and temperature detection function |
-
2019
- 2019-06-03 CN CN201920820683.3U patent/CN210584463U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110280124A (en) * | 2019-06-03 | 2019-09-27 | 江苏智道工程技术有限公司 | A kind of system adjusting dispersing gas desulfurization and dedusting for CDQ pressure |
| CN111889219A (en) * | 2020-07-24 | 2020-11-06 | 圣米尔斯科技(深圳)有限公司 | Mill with pressure difference and temperature detection function |
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