CN215782635U - Utilize SDS dry process desulfurization's coke oven flue gas integrated purification system - Google Patents
Utilize SDS dry process desulfurization's coke oven flue gas integrated purification system Download PDFInfo
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- CN215782635U CN215782635U CN202120300688.0U CN202120300688U CN215782635U CN 215782635 U CN215782635 U CN 215782635U CN 202120300688 U CN202120300688 U CN 202120300688U CN 215782635 U CN215782635 U CN 215782635U
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- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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Abstract
The utility model provides a coke oven flue gas comprehensive purification system utilizing SDS dry desulphurization, which comprises an original flue, an SDS dry desulphurization module, a transition flue, a ceramic catalysis filter bag module, a clean flue and a chimney which are sequentially arranged along the flow direction of coke oven flue gas, the SDS dry desulphurization module comprises a desulfurizer jetting device, a Venturi section and a desulphurization reactor, coke oven flue gas enters through an original flue, and contacts with the desulfurizer sprayed by the desulfurizer spraying device, an outlet flue of the desulfurizer spraying device is connected with the desulfurization reactor through a Venturi section, the coke oven flue gas and the desulfurizer enter the Venturi section and the desulfurization reactor together for fully mixing reaction, the outlet of the desulfurization reactor is connected with the ceramic catalytic filter bag module through a transition flue for denitration and dust removal, and the outlet of the ceramic catalytic filter bag module is connected with a chimney through a clean flue. The system has high desulfurization, denitrification and dust removal efficiency, can remove pollutants such as heavy metal, dioxin and the like in a synergic manner, and has low ammonia escape rate.
Description
[ technical field ] A method for producing a semiconductor device
The utility model relates to the technical field of flue gas purification, in particular to a coke oven flue gas comprehensive purification system utilizing SDS dry desulphurization.
[ background of the utility model ]
The coke oven smoke, namely the waste gas generated after the fuel is heated and combusted on the coke oven, the smoke components are different according to the coke oven type, the production process, the fuel type and the like, and SO in the smoke2And NOx concentration range is wide and reaches 50-600mg/m3And 400-1200mg/m3The temperature of the flue gas is lower, and is generally at 190 ℃ and 280 ℃.
Because of the influence of the coke oven flue gas characteristics, the application of various desulfurization and denitrification processes is restricted by different degrees, and at present, the actual engineering at home and abroad mainly adopts SCR denitration, dedusting and ammonia desulfurization, SCR denitration, dedusting and calcium-based SDA (SDA) semi-dryMethod for controlling SO in coke oven flue gas by flue gas purification technologies such as method desulfurization, calcium-based SDA (first-generation SDA) semi-dry desulfurization, dust removal, medium-low temperature SCR (selective catalytic reduction) denitration, activated carbon dry desulfurization and denitration and the like2And NOx emissions.
The prior desulfurization technology has the following defects:
1. when the flue gas of the coke oven is purified by adopting the processes of SCR denitration, dedusting and ammonia desulphurization, the ammonia desulphurization easily causes acid corrosion to a chimney, the equipment maintenance cost is high, and the ammonium bisulfate generated by preposed denitration influences the stability of the catalyst.
2. When the SCR denitration, dedusting and calcium-based SDA semi-dry desulfurization process is adopted, ammonium bisulfate generated by preposed denitration influences the stability of the catalyst, and the method has large floor area and high energy consumption.
3. When the calcium-based SDA semi-dry desulfurization, dedusting and medium-low temperature SCR denitration process is adopted, the occupied area is large, and the energy consumption is high.
4. When the activated carbon dry desulfurization and denitrification process is adopted, the materials are easy to burn, the temperature drop of the flue gas is large, and the one-time investment and operation cost are high.
[ Utility model ] content
The utility model aims to solve the problems in the prior art, provides a coke oven flue gas comprehensive purification system utilizing SDS dry desulfurization, has high desulfurization, denitrification and dust removal efficiency, can remove pollutants such as heavy metal, dioxin and the like in a synergistic manner, and has low ammonia escape rate.
In order to achieve the purpose, the utility model provides a coke oven flue gas comprehensive purification system utilizing SDS dry desulphurization, which comprises an original flue, an SDS dry desulphurization module, a transition flue, a ceramic catalysis filter bag module, a clean flue and a chimney which are sequentially arranged along the flow direction of coke oven flue gas, wherein the SDS dry desulphurization module is arranged at the downstream of the original flue, the SDS dry desulphurization module comprises a desulfurizer injection device, a Venturi section and a desulphurization reactor, the outlet of the original flue is connected with the desulfurizer injection device, the coke oven flue gas enters the desulfurizer injection device through the original flue and is contacted with a desulfurizer sprayed by the desulfurizer injection device, the outlet flue of the desulfurizer injection device is connected with the desulphurization reactor through the Venturi section, the coke oven flue gas and the desulfurizer jointly enter the Venturi section and are fully mixed and reacted in the desulphurization reactor to complete desulphurization, the outlet of the desulphurization reactor is connected with the ceramic catalysis filter bag module through transition, the coke oven flue gas desulfurized by the desulfurization reactor is connected to the ceramic catalytic filter bag module for denitration and dust removal, the outlet of the ceramic catalytic filter bag module is connected with the chimney through the clean flue, and the flue gas desulfurized, denitrated and dust removed is discharged into the atmosphere through the clean flue and the chimney in sequence.
Preferably, the SDS dry desulphurization module further comprises a desulfurizer powder bin and a blanking device connected with the desulfurizer powder bin, and the desulfurizer in the desulfurizer powder bin enters the desulfurizer spraying device through the blanking device.
Preferably, the desulfurizing agent is sodium bicarbonate.
Preferably, a plurality of guide vanes which are spirally upward at 45 degrees are arranged in the venturi section and the desulfurization reactor.
Preferably, the diameter of the Venturi section is 0.75-0.9 times of the diameter of the desulfurization reactor.
Preferably, the ceramic catalytic filter bag module comprises an ammonia injection device and a ceramic catalytic filter bag, the desulfurization reactor is connected with the ammonia injection device through a transition flue, and a denitration reducing agent injected by the ammonia injection device is contacted with desulfurized coke oven flue gas and jointly enters the ceramic catalytic filter bag for denitration and dust removal.
Preferably, the ceramic catalytic filter bag comprises a main reaction chamber, a plurality of groups of ceramic catalytic filter tubes arranged in the main reaction chamber, an ash removal device, a discharge hopper arranged at the bottom of the main reaction chamber and an air outlet chamber arranged at the top of the main reaction chamber, the denitration reducing agent sprayed by the ammonia spraying device and the flue gas of the desulfurization coke oven are mixed and enter the main reaction chamber, catalytic reduction reaction is carried out at the ceramic catalytic filter tubes to complete denitration, large-particle dust in the main reaction chamber falls into the discharge hopper under the action of gravity, small-particle dust is deposited on the ceramic catalytic filter tubes, the ash removal device is used for blowing the small-particle dust on the ceramic catalytic filter tubes into the discharge hopper to complete dust removal, the air outlet chamber is connected with a chimney through a clean flue, and the flue gas after desulfurization, denitration and dust removal is discharged into the atmosphere through the air outlet chamber, the clean flue and the chimney in sequence.
Preferably, an ammonia oxidation catalyst layer is further arranged in the gas outlet chamber and used for further realizing low ammonia escape.
The utility model has the beneficial effects that: the dust removal and denitration integrated device has the advantages that the desulfurized flue gas can directly enter the ceramic catalytic filter bag for reaction without a temperature rise device, the layout is reasonable, the occupied area is small, the investment is low, the process technology is simple and practical, the operation is stable, and the maintenance is convenient. The whole operation is anhydrous, the temperature drop is avoided, and the corrosion of equipment and a chimney is avoided. The desulfurizer has wide source, low cost, less byproducts, high sodium sulfate content and convenient utilization. The integrated catalyst has the advantages of high efficiency, corrosion resistance, high temperature resistance and desulfurization function.
The features and advantages of the present invention will be described in detail by embodiments in conjunction with the accompanying drawings.
[ description of the drawings ]
FIG. 1 is a schematic structural diagram of a coke oven flue gas comprehensive purification system utilizing SDS dry desulfurization;
FIG. 2 is a schematic sectional structure diagram of a venturi section of a coke oven flue gas comprehensive purification system utilizing SDS dry desulfurization.
[ detailed description ] embodiments
Referring to fig. 1, the utility model relates to a coke oven flue gas comprehensive purification system utilizing SDS dry desulphurization, which comprises an original flue 1, an SDS dry desulphurization module 2, a transition flue 3, a ceramic catalytic filter bag module 4, a clean flue 5 and a chimney 6 which are sequentially arranged along the flow direction of coke oven flue gas, wherein the SDS dry desulphurization module 2 is arranged at the downstream of the original flue 1, the SDS dry desulphurization module 2 comprises a desulfurizer injection device 23, a venturi section 24 and a desulphurization reactor 25, an outlet of the original flue 1 is connected with the desulfurizer injection device 23, coke oven flue gas enters the desulfurizer injection device 23 through the original flue 1 and contacts with desulfurizer sprayed by the desulfurizer injection device 23, an outlet flue of the desulfurizer injection device 23 is connected with the desulphurization reactor 25 through the venturi section 24, and coke oven flue gas and desulfurizer jointly enter the venturi section 24 and the desulphurization reactor 25 for complete mixing reaction, and after the desulfurization is finished, the outlet of the desulfurization reactor 25 is connected with the ceramic catalytic filter bag module 4 through the transition flue 3, the coke oven flue gas desulfurized by the desulfurization reactor 25 is connected with the ceramic catalytic filter bag module 4 for denitration and dust removal, the outlet of the ceramic catalytic filter bag module 4 is connected with the chimney 6 through the clean flue 5, and the flue gas desulfurized, denitrated and dust removed is discharged into the atmosphere through the clean flue 5 and the chimney 6 in sequence.
Further, the SDS dry desulfurization module 2 further includes a desulfurizer powder bin 21 and a blanking device 22 connected to the desulfurizer powder bin 21, and the desulfurizer in the desulfurizer powder bin 21 enters a desulfurizer spraying device 23 through the blanking device 22. The desulfurizer is sodium bicarbonate.
Further, a plurality of guide vanes 20 with 45 degrees spiral upward are arranged inside the venturi section 24 and the desulfurization reactor 25.
Further, the SDS dry desulphurization module 2 has a main body material of Q345, and the diameter of the Venturi section 24 is 0.75-0.9 times of the diameter of the desulphurization reactor 25.
Further, the ceramic catalytic filter bag module 4 comprises an ammonia injection device 41 and a ceramic catalytic filter bag 42, the desulfurization reactor 25 is connected with the ammonia injection device 41 through a transition flue 3, and a denitration reducing agent injected by the ammonia injection device 41 contacts with desulfurized coke oven flue gas and jointly enters the ceramic catalytic filter bag 42 for denitration and dust removal. Specifically, the ceramic catalytic filter bag 42 includes a main reaction chamber 43, a plurality of ceramic catalytic filter tubes 45 arranged in the main reaction chamber 43, a dust removing device 46, a discharge hopper 44 arranged at the bottom of the main reaction chamber 43, and an air outlet chamber 47 arranged at the top of the main reaction chamber 43, the denitration reducing agent sprayed by the ammonia spraying device 41 and the flue gas of the desulfurization coke oven are mixed and enter the main reaction chamber 43, a catalytic reduction reaction is performed at the ceramic catalytic filter tube 45 to complete denitration, the large-particle dust in the main reaction chamber 43 falls into the discharge hopper 44 under the action of gravity, the small-particle dust is deposited on the ceramic catalytic filter tube 45, the dust removing device 46 is used for blowing the small-particle dust on the ceramic catalytic filter tube 45 into the discharge hopper 44 to complete dust removal, the air outlet chamber 47 is connected with a chimney 6 through a clean flue 5, and the flue gas after desulfurization, denitration and dust removal sequentially passes through the air outlet chamber 47 and the air outlet chamber 47, The clean flue 5 and the stack 6 are discharged into the atmosphere. And an ammonia oxidation catalyst layer is arranged in the gas outlet chamber 47 and used for further realizing low ammonia escape.
The working process of the utility model is as follows:
in the using process of the coke oven flue gas comprehensive purification system utilizing the SDS dry desulfurization, sodium bicarbonate serving as a desulfurizing agent in a desulfurizing agent powder bin 21 enters an original flue 1 through a blanking device 22 and a desulfurizing agent injection device 23 to contact with coke oven flue gas, and then enters a Venturi section 24 and a desulfurization reactor 25 together to be fully mixed and react, so that the desulfurization is completed. The desulfurized coke oven flue gas enters a ceramic catalytic filter bag module 4 from a transition flue 3. The ceramic catalyzed filter bag module 4 includes an ammonia injection device 41 and a ceramic catalyzed filter bag 42 for NOx and dust control. The denitration reducing agent ammonia enters the transition flue 3 through the ammonia injection device 41 to contact with the desulfurized coke oven flue gas, and enters the main reaction chamber 43 of the ceramic catalytic filter bag 42 together, and catalytic reduction reaction occurs at the ceramic catalytic filter tube 45 to complete denitration. The large-particle dust falls into the discharge hopper 44 under the action of gravity, the small-particle dust is deposited on the ceramic catalytic filter tube 45, and the ash removal device 46 sweeps the small-particle dust on the ceramic catalytic filter tube 45 into the discharge hopper 44 to complete dust removal. The flue gas after desulfurization, denitrification and dust removal is discharged into the atmosphere through the gas outlet chamber 47, the clean flue 5 and the chimney 6 in sequence.
The above embodiments are illustrative of the present invention, and are not intended to limit the present invention, and any simple modifications of the present invention are within the scope of the present invention.
Claims (8)
1. A coke oven flue gas comprehensive purification system utilizing SDS dry desulphurization is characterized in that: the device comprises an original flue (1), an SDS dry desulphurization module (2), a transition flue (3), a ceramic catalytic filter bag module (4), a clean flue (5) and a chimney (6) which are sequentially arranged along the flowing direction of coke oven flue gas, wherein the SDS dry desulphurization module (2) is arranged at the downstream of the original flue (1), the SDS dry desulphurization module (2) comprises a desulfurizer injection device (23), a Venturi section (24) and a desulphurization reactor (25), the outlet of the original flue (1) is connected with the desulfurizer injection device (23), the coke oven flue gas enters the desulfurizer injection device (23) through the original flue (1) and contacts with the desulfurizer sprayed by the desulfurizer injection device (23), the outlet flue of the desulfurizer injection device (23) is connected with the desulphurization reactor (25) through the Venturi section (24), and the coke oven flue gas and the desulfurizer jointly enter the Venturi section (24) and the desulphurization reactor (25) for fully mixing reaction, and the desulfurization is completed, the outlet of the desulfurization reactor (25) is connected with the ceramic catalytic filter bag module (4) through the transition flue (3), the coke oven flue gas desulfurized by the desulfurization reactor (25) is connected into the ceramic catalytic filter bag module (4) for denitration and dust removal, the outlet of the ceramic catalytic filter bag module (4) is connected with the chimney (6) through the clean flue (5), and the flue gas desulfurized, denitrated and dust removed is discharged into the atmosphere through the clean flue (5) and the chimney (6) in sequence.
2. The coke oven flue gas comprehensive purification system utilizing SDS dry desulphurization as recited in claim 1, characterized in that: the SDS dry desulphurization module (2) further comprises a desulfurizer powder bin (21) and a blanking device (22) connected with the desulfurizer powder bin (21), and desulfurizer in the desulfurizer powder bin (21) enters a desulfurizer injection device (23) through the blanking device (22).
3. The coke oven flue gas comprehensive purification system utilizing SDS dry desulphurization as recited in claim 1, characterized in that: the desulfurizer is sodium bicarbonate.
4. The coke oven flue gas comprehensive purification system utilizing SDS dry desulphurization as recited in claim 1, characterized in that: and a plurality of guide vanes (20) which are spirally upward at 45 degrees are arranged in the venturi section (24) and the desulfurization reactor (25).
5. The coke oven flue gas comprehensive purification system utilizing SDS dry desulphurization as recited in claim 1, characterized in that: the diameter of the Venturi section (24) is 0.75-0.9 times of the diameter of the desulfurization reactor (25).
6. The coke oven flue gas comprehensive purification system utilizing SDS dry desulphurization as recited in claim 1, characterized in that: the ceramic catalytic filter bag module (4) comprises an ammonia injection device (41) and a ceramic catalytic filter bag (42), the desulfurization reactor (25) is connected with the ammonia injection device (41) through a transition flue (3), and a denitration reducing agent injected by the ammonia injection device (41) is contacted with desulfurized coke oven flue gas and jointly enters the ceramic catalytic filter bag (42) for denitration and dust removal.
7. The coke oven flue gas comprehensive purification system utilizing SDS dry desulphurization as recited in claim 6, characterized in that: the ceramic catalytic filter bag (42) comprises a main reaction chamber (43), a plurality of groups of ceramic catalytic filter tubes (45) arranged in the main reaction chamber (43), an ash removal device (46), a discharge hopper (44) arranged at the bottom of the main reaction chamber (43) and an air outlet chamber (47) arranged at the top of the main reaction chamber (43), wherein a denitration reducing agent sprayed by an ammonia spraying device (41) and desulfurization coke oven flue gas are mixed and enter the main reaction chamber (43), a catalytic reduction reaction is carried out at the ceramic catalytic filter tubes (45) to complete denitration, large-particle dust in the main reaction chamber (43) falls into the discharge hopper (44) under the action of gravity, small-particle dust is deposited on the ceramic catalytic filter tubes (45), the ash removal device (46) is used for sweeping the small-particle dust on the ceramic catalytic filter tubes (45) into the discharge hopper (44) to complete dust removal, the air outlet chamber (47) is connected with a chimney (6) through a clean flue (5), the flue gas after desulfurization, denitration and dust removal is discharged into the atmosphere through an air outlet chamber (47), a clean flue (5) and a chimney (6) in sequence.
8. The coke oven flue gas comprehensive purification system utilizing SDS dry desulphurization as recited in claim 7, characterized in that: and an ammonia oxidation catalyst layer is also arranged in the gas outlet chamber (47) and used for further realizing low ammonia escape.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115463531A (en) * | 2022-10-12 | 2022-12-13 | 济南国能环境工程有限公司 | Ultralow-emission purification treatment system and method for sulfur and nitrate dust in flue gas at tail of biomass boiler |
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2021
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115463531A (en) * | 2022-10-12 | 2022-12-13 | 济南国能环境工程有限公司 | Ultralow-emission purification treatment system and method for sulfur and nitrate dust in flue gas at tail of biomass boiler |
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