An exhaust gas collection and recovery device at the top of an SDS desulfurization material silo

Abstract

This utility model discloses an exhaust gas collection and recovery device at the top of an SDS desulfurization material silo, comprising a flue, an ash silo, an ash silo dust collector, an ash silo exhaust gas collection pipe, an ash conveying pipe, a pneumatic ash conveying device, a chimney, a flue gas duct after a bag filter, a bag filter, a post-desulfurization flue gas duct, a desulfurization reactor, an exhaust gas collection pipe for the desulfurizing agent silo, a dust collector for the desulfurizing agent silo, a desulfurizing agent silo, and a desulfurizing agent powder delivery pipe. The flue gas duct, desulfurization reactor, post-desulfurization flue gas duct, bag filter, post-bag filter flue gas duct, and chimney are connected sequentially. The desulfurizing agent silo, desulfurizing agent powder delivery pipe, and flue gas duct are connected sequentially. The inlet side of the dust collector for the desulfurizing agent silo is connected to the desulfurizing agent silo, and the outlet side is connected to the flue gas duct via the exhaust gas collection pipe for the desulfurizing agent silo. This device achieves centralized management of pollutant emissions, reduces pollutant emission outlets in the desulfurization system, and is beneficial for environmental supervision of pollutant emissions.

Description

Technical Field

[0001] This utility model relates to a waste gas treatment device, and more particularly to a top exhaust gas collection and recovery device for an SDS desulfurization material silo. Background Technology

[0002] In industrial production, the flue gas from boilers, coke ovens, and other industrial furnaces contains a certain amount of harmful gases such as SO2 and SO3. According to relevant national and industry environmental protection standards, SO2 and SO3 in the flue gas must be removed and meet relevant limits before being discharged into the atmosphere. SDS (Sodium Dithionite Solution) desulfurization technology is one of the most widely used methods currently.

[0003] The main process flow of SDS desulfurization is as follows: Sodium bicarbonate desulfurizing agent is temporarily stored in a silo and fed into a grinder to be ground into ultrafine powder by a feeder at the bottom of the silo. The powder is then blown to the inlet of the desulfurization reactor by a powder conveying fan. Inside the desulfurization reactor, the sodium-based desulfurizing agent mixes and reacts with the incoming flue gas, thereby removing most of the acidic gas components such as SO2 and SO3 from the flue gas. The sodium salts such as sodium sulfate generated by the reaction are collected by a bag filter and transported to the ash silo, and then transported away by a special vehicle. The purified flue gas achieves the standard emission.

[0004] During the operation of desulfurization equipment, a certain amount of suspended dust will exist inside the desulfurizing agent silo and the desulfurization by-product ash silo. Installing a dust collector on the top of the silo is a key measure to ensure effective control and management of dust during production. The silo top dust collector mainly purifies the air through filtration and dust removal technology, preventing dust leakage into the environment and achieving the goal of environmental protection. The exhaust gas from the silo top dust collector is generally discharged directly into the air, and the discharged gas contains trace amounts of particulate matter, requiring regular environmental monitoring to verify whether emissions meet standards. Failure of the silo top dust collector poses a risk of excessive emissions and environmental pollution. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide an environmentally friendly exhaust gas collection and recovery device at the top of the SDS desulfurization material silo.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: It includes a flue, an ash silo, an ash silo dust collector, an ash silo exhaust collection pipe, an ash conveying pipe, a pneumatic ash conveying device, a chimney, a flue after the bag filter dust collector, a bag filter dust collector, a flue after desulfurization, a desulfurization reactor, an exhaust collection pipe for the desulfurizing agent silo, a dust collector for the desulfurizing agent silo, a desulfurizing agent silo, and a desulfurizing agent powder conveying pipe; the flue, desulfurization reactor, flue after desulfurization, bag filter dust collector, flue after the bag filter dust collector, and... The chimneys are connected in sequence; the desulfurizing agent silo, the desulfurizing agent powder conveying pipe, and the flue are connected in sequence; the inlet side of the desulfurizing agent silo dust collector is connected to the desulfurizing agent silo, and the outlet side is connected to the flue through the desulfurizing agent silo exhaust collection pipe; one end of the ash conveying pipe is connected to the pneumatic ash conveying device, and the other end is connected to the ash silo, and the ash outlet at the bottom of the bag filter is connected to the ash conveying pipe; the inlet side of the ash silo dust collector is connected to the inside of the ash silo, and the outlet side is connected to the flue after desulfurization through the ash silo exhaust collection pipe.

[0007] Furthermore, a feeder and a grinder are also provided; the desulfurizing agent silo is connected to the desulfurizing agent powder delivery pipeline via the feeder and the grinder.

[0008] Furthermore, a flue gas booster fan is installed on the flue gas duct after the bag filter.

[0009] Furthermore, a powder feeding fan is installed on the desulfurizing agent powder feeding pipeline.

[0010] Furthermore, the desulfurizing agent silo exhaust collection pipe is equipped with a desulfurizing agent silo exhaust control valve.

[0011] Furthermore, the ash silo exhaust collection pipe is equipped with an ash silo exhaust control valve.

[0012] Furthermore, several bag filters are connected in series, and the ash outlet at the bottom of all bag filters is connected to the ash conveying pipe.

[0013] The beneficial effects of adopting the above technical solution are as follows: This utility model collects the exhaust gas from the top dust collectors of the desulfurizing agent silo and ash silo during the operation of the desulfurization system through the exhaust gas collection pipes of the desulfurizing agent silo and the ash silo, and introduces it into the flue. After being treated by the bag filter, it is discharged into the atmosphere through the chimney. This realizes centralized management of pollutant emissions, reduces the number of pollutant emission outlets of the desulfurization system, and is conducive to environmental supervision of pollutant emissions. Attached Figure Description

[0014] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0015] Figure 1 This is a schematic diagram of the structure of this utility model.

[0016] In the diagram: 1. Flue; 2. Ash silo; 3. Ash silo dust collector; 4. Ash silo exhaust control valve; 5. Ash silo exhaust collection pipe; 6. Ash conveying pipe; 7. Pneumatic ash conveying device; 8. Chimney; 9. Flue gas booster fan; 10. Flue after bag filter; 11. Bag filter; 12. Flue after desulfurization; 13. Desulfurization reactor; 14. Desulfurizing agent silo exhaust collection pipe; 15. Desulfurizing agent silo exhaust control valve; 16. Desulfurizing agent silo dust collector; 17. Desulfurizing agent silo; 18. Feeder; 19. Grinding mill; 20. Powder conveying fan; 21. Desulfurizing agent powder conveying pipe. Detailed Implementation

[0017] Figure 1 As shown, the exhaust gas collection and recovery device at the top of the SDS desulfurization material silo includes a flue 1, an ash silo 2, an ash silo dust collector 3, an ash silo exhaust gas collection pipe 5, an ash conveying pipe 6, a pneumatic ash conveying device 7, a chimney 8, a flue 10 after the bag filter dust collector, a bag filter dust collector 11, a desulfurization post-flue 12, a desulfurization reactor 13, an exhaust gas collection pipe 14 for the desulfurizing agent silo, a desulfurizing agent silo dust collector 16, a desulfurizing agent silo 17, a feeder 18, a grinder 19, and a desulfurizing agent powder delivery pipe 21. The outlet of the flue 1 is connected to the inlet of the desulfurization reactor 13, the outlet of the desulfurization reactor 13 is connected to the inlet of the bag filter dust collector 11 through the desulfurization post-flue 12, and the outlet of the bag filter dust collector 11 is connected to the inlet of the chimney 8 through the bag filter post-flue 10; a flue gas booster fan 9 is installed on the bag filter post-flue 10. Several baghouse dust collectors 11 are connected in series.

[0018] Figure 1 As shown, the exhaust gas collection and recovery device at the top of the SDS desulfurization material silo is configured such that the outlet of the desulfurizing agent silo 17 is connected to the inlet of the feeder 18 via a pipe, the outlet of the feeder 18 is connected to the inlet of the grinder 19 via a pipe, and the outlet of the grinder 19 is connected to the flue 1 via the desulfurizing agent powder feeding pipe 21; a powder feeding fan 20 is provided on the desulfurizing agent powder feeding pipe 21.

[0019] Figure 1 As shown, the exhaust gas collection and recovery device at the top of the SDS desulfurization material silo is a dust collector 16 installed on the top of the desulfurization agent silo 17. The inlet side of the dust collector 16 is connected to the desulfurization agent silo 17, and the outlet side is connected to the flue 1 through the exhaust gas collection pipe 14 of the desulfurization agent silo. The exhaust gas collection pipe 14 of the desulfurization agent silo is equipped with an exhaust gas control valve 15 of the desulfurization agent silo.

[0020] Figure 1 As shown, the exhaust gas collection and recovery device at the top of the SDS desulfurization material silo is connected to the ash conveying pipe 6 at one end, which is connected to the pneumatic ash conveying device 7 and the other end, which is connected to the ash silo 2. All the ash outlets at the bottom of the bag filter dust collectors 11 are connected to the ash conveying pipe 6.

[0021] Figure 1 As shown, the exhaust gas collection and recovery device at the top of the SDS desulfurization material silo is a dust collector 3 installed on the top of the ash silo 2. The inlet side of the dust collector 3 is connected to the inside of the ash silo 2, and the outlet side is connected to the flue gas duct 12 after desulfurization through the exhaust gas collection pipe 5. The exhaust gas collection pipe 5 is equipped with an exhaust gas control valve 4.

[0022] With the above structure, the flue gas flows along the flue duct 1. The desulfurizing agent in the desulfurizing agent silo 17 is ground by the grinder 19 and then sent into the flue duct 1 to mix with the flue gas. It then enters the desulfurization reactor 13 for desulfurization reaction. The desulfurized flue gas enters the bag filter 11 for dust removal, and is then pressurized by the flue gas booster fan 9 before being discharged into the atmosphere through the chimney 8. The by-products of the SDS desulfurization are transported to the ash silo 2 by the pneumatic ash conveying device 7. The exhaust gas from the top of the ash silo 2 is dusted by the ash silo dust collector 3 and then mixed with the desulfurized flue gas discharged from the desulfurization reactor 13 before entering the bag filter 11. The exhaust gas from the top of the desulfurizing agent silo 17 is dusted by the desulfurizing agent silo dust collector 16 and then enters the flue duct 1, where it mixes with the flue gas and desulfurizing agent before entering the desulfurization reactor 13.

[0023] Figure 1 As shown, the working process of the exhaust gas collection and recovery device at the top of the SDS desulfurization material silo is as follows:

[0024] During normal operation of the desulfurization system, flue gas flows in flue duct 1. The desulfurizing agent in the desulfurizing agent silo 17 is ground by the grinder 19 and then sprayed into flue duct 1 at the inlet of the desulfurization reactor 13. The flue gas and the desulfurizing agent are mixed together and enter the desulfurization reactor 13. The desulfurizing agent reacts with acidic gases such as SO2 and SO3 in the flue gas. The sodium salts such as sodium sulfate generated by the reaction are collected by the bag filter 11 and transported to the ash silo, and then transported away by a special vehicle. The purified flue gas achieves the standard emission.

[0025] During the operation of the desulfurization equipment, a certain amount of suspended dust will exist inside the desulfurizing agent silo 17 and the ash silo 3 storing desulfurization by-products. Installing ash silo dust collectors 3 and desulfurizing agent silo dust collectors 16 on the top of the silos is a key measure to ensure effective control and management of dust during production, preventing dust leakage into the environment and achieving the goal of environmental protection. The gas discharged from the desulfurizing agent silo dust collector 16 contains trace amounts of particulate matter. The exhaust gas from the desulfurizing agent silo dust collector 16 is introduced into the flue duct 1 through the desulfurizing agent silo exhaust collection pipe 14. The gas discharged from the ash silo dust collector 3 contains trace amounts of particulate matter. The exhaust gas from the ash silo dust collector 3 is introduced into the desulfurization flue duct 12 through the ash silo exhaust collection pipe 5. After being treated by the bag filter dust collector 11, the qualified flue gas enters the flue gas booster fan 9 after passing through the bag filter dust collector and then enters the atmosphere through the chimney 8.

[0026] When the desulfurizing agent silo 17 or the desulfurizing agent silo dust collector 16 needs to be inspected online during operation, the desulfurizing agent silo exhaust control valve 15 shall be closed to cut off the flow with the flue 1.

[0027] When the ash silo 2 or the ash silo dust collector 3 needs to be inspected online during operation, the ash silo exhaust control valve 4 shall be closed to cut off the flow with the desulfurized flue 12.

[0028] Figure 1 As shown, one embodiment of the exhaust gas collection and recovery device at the top of the SDS desulfurization material silo is as follows:

[0029] The SDS desulfurization gas-fired boiler model is HG-330 / 17.5-Q1, with a maximum design flue gas volume of 860,000 m³. 3 / h;

[0030] The bag filter dust collector model 11 is LXMC-20257;

[0031] Gray Silo 2 model is V=20m 3 ;

[0032] The dust collector for the ash silo is model DMC-24.

[0033] The ash silo exhaust control valve 4 is model D943H-1.0, DN250;

[0034] The specification of the ash silo exhaust collection pipe 5 is D273×5;

[0035] Chimney 8 is 90m high;

[0036] The flue gas booster fan is model YGA2981-2*211F (2 units), with a matching motor of 2240kW;

[0037] The desulfurization reactor model 13 has a flue gas treatment capacity of Q=860,000 m³. 3 / h;

[0038] The exhaust collection pipe 14 of the desulfurizing agent silo has a specification of D273×5;

[0039] The exhaust control valve for the desulfurizing agent silo is model D943H-1.0, DN250.

[0040] The desulfurizing agent silo dust collector model 16 is DMC-6;

[0041] Desulfurizing agent silo model 17 has a V=5m 3 2 units.

Claims

1. A device for collecting and recovering exhaust gas from the top of an SDS desulfurizer material bin, characterized by: The system includes a flue (1), an ash silo (2), an ash silo dust collector (3), an ash silo exhaust collection pipe (5), an ash conveying pipe (6), a pneumatic ash conveying device (7), a chimney (8), a flue after the bag filter (10), a bag filter (11), a flue after desulfurization (12), a desulfurization reactor (13), an exhaust collection pipe for the desulfurizing agent silo (14), a dust collector for the desulfurizing agent silo (16), a desulfurizing agent silo (17), and a desulfurizing agent powder delivery pipe (21); the flue (1), the desulfurization reactor (13), the flue after desulfurization (12), the bag filter (11), the flue after the bag filter (10), and the chimney (8) are arranged according to... The desulfurizing agent silo (17), desulfurizing agent powder delivery pipe (21) and flue (1) are connected in sequence; the inlet side of the desulfurizing agent silo dust collector (16) is connected to the desulfurizing agent silo (17), and the outlet side is connected to the flue (1) through the desulfurizing agent silo exhaust collection pipe (14); one end of the ash conveying pipe (6) is connected to the pneumatic ash conveying device (7), and the other end is connected to the ash silo (2), and the ash outlet at the bottom of the bag filter (11) is connected to the ash conveying pipe (6); the inlet side of the ash silo dust collector (3) is connected to the inside of the ash silo (2), and the outlet side is connected to the desulfurized flue (12) through the ash silo exhaust collection pipe (5).

2. The SDS desulfurizer material bin top exhaust gas collection and recovery device according to claim 1, characterized in that: It is also equipped with a feeder (18) and a grinder (19); the desulfurizing agent silo (17) is connected to the desulfurizing agent powder delivery pipe (21) via the feeder (18) and the grinder (19).

3. The SDS desulfurizer material bin top exhaust gas collection and recovery device according to claim 1, characterized in that: A flue gas booster fan (9) is installed on the flue gas duct (10) of the bag filter.

4. The SDS desulfurizer material bin top exhaust gas collection and recovery device according to claim 1, characterized in that: The desulfurizing agent powder delivery pipeline (21) is equipped with a powder delivery fan (20).

5. The exhaust gas collection and recovery device at the top of the SDS desulfurization material silo according to claim 1, characterized in that: The desulfurizing agent silo exhaust collection pipe (14) is equipped with a desulfurizing agent silo exhaust control valve (15).

6. The exhaust gas collection and recovery device at the top of the SDS desulfurization material silo according to claim 1, characterized in that: The ash silo exhaust collection pipe (5) is equipped with an ash silo exhaust control valve (4).

7. The apparatus according to any one of claims 1-6, wherein the apparatus is a top exhaust gas collection and recovery device for a SDS desulfurizer material bin. Several bag filters (11) are connected in series, and the ash outlet at the bottom of all bag filters (11) is connected to the ash conveying pipe (6).

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