CN213159797U - Dust-removing and desulfurizing device for dry quenching waste gas - Google Patents
Dust-removing and desulfurizing device for dry quenching waste gas Download PDFInfo
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- CN213159797U CN213159797U CN202021826278.1U CN202021826278U CN213159797U CN 213159797 U CN213159797 U CN 213159797U CN 202021826278 U CN202021826278 U CN 202021826278U CN 213159797 U CN213159797 U CN 213159797U
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Abstract
The utility model relates to a dry quenching waste gas dust removal and desulfurization device, which comprises an environment dust remover, wherein a filter chamber of the environment dust remover is divided into a high-dust high-sulfur waste gas filter unit and a high-dust low-sulfur waste gas filter unit; the inlet of the high-dust high-sulfur waste gas dust remover is connected with a high-dust high-sulfur waste gas collecting device, and the rear section of the outlet of the high-dust high-sulfur waste gas dust remover is sequentially connected with a desulfurizing tower, a denitration reactor and a coke oven smoke discharge chimney; the inlet end of the desulfurizing tower is connected with a coke oven flue gas main pipeline; the inlet of the high-dust low-sulfur waste gas dust remover is connected with the high-dust low-sulfur waste gas collecting device, and the outlet of the high-dust low-sulfur waste gas dust remover is connected with the dry quenching waste gas discharge chimney. Compared with the prior art, the technology only needs to simply transform the dust remover of the ground environment station and additionally arrange a necessary draught fan and a necessary connecting pipeline, the device has high utilization rate, less investment, small occupied area and recoverable dust.
Description
Technical Field
The utility model belongs to the environmental engineering field especially relates to a dry coke quenching waste gas dust removal desulphurization unit.
Background
In the coking industry, the application of the dry quenching process effectively solves the problem of pollution to the atmosphere and water environment caused by the traditional wet quenching, and the heat of red coke is effectively utilized. However, dry quenching, an environmentally friendly and energy saving measure in the coking industry, still inevitably results in the emission of some waste products, such as dry quenching exhaust gas.
The discharge of the dry quenching waste gas can be divided into two types: a coke-loading, coke-discharging and pre-storing chamber for dry quenching coke is mainly high-dust gas with low contents of sulfur and other pollutants, and can meet the discharge standard after dust removal, and the concentration of particulate matters is less than or equal to 10mg/Nm3The concentration of sulfur dioxide is less than or equal to 50mg/Nm3(ii) a The other gas emission is mainly flue gas discharged after a dry quenching circulating gas pipeline fan and collected by a dedusting pipeline at a basement coke discharging chute, the gas amount is less and accounts for 10-15% of the total gas amount, the dust and sulfur content are high, and the concentration of sulfur dioxide is about 1900mg/Nm3. Both gases need to be treated and can be discharged, and dust contained in both gases is recyclable coke powder.
At present, the dry quenching waste gas treatment modes can be roughly divided into three types: the first method is that the dry quenching waste gas is collected in a centralized way, enters a ground environment station for dedusting, enters a newly-built desulphurization device for full flue gas desulphurization and purification and then is discharged; and the second method is that the two waste gases are respectively treated, the high-dust low-sulfur gas enters a ground environment station for dust removal and then is discharged, and a set of dust removal device is newly built for dust removal of the high-dust high-sulfur gas, and then the high-dust high-sulfur gas is introduced into a coke oven flue gas desulfurization and denitrification system for purification and then is discharged. And the third method is to treat the two waste gases respectively, discharge the high-dust low-sulfur gas after the high-dust low-sulfur gas enters a ground environment station for dedusting, and discharge the high-dust high-sulfur gas after the high-dust high-sulfur gas is directly introduced into a coke oven flue gas desulfurization and denitrification dedusting system with a dedusting function and is treated to reach the standard. The three treatment modes have certain defects or shortcomings, and the first mode needs to establish a new desulfurization system for treating all waste gas except the ground environment station, so that the system is huge, the occupied area is large, and the investment is large; in the second mode, a desulfurization device is not required to be built, but a set of dust removal device is required to be newly built and a back blowing system and an ash conveying system are matched, and the ground environment station can meet the treatment capacity of all waste gas, the floor area is newly increased, the device investment is repeated, and the system is complicated; in the third mode, only an induced draft fan is needed to be added, but the dry quenching waste gas dust has a usable value for coke powder, and the flue gas dust cannot be utilized after being collected by a dust remover of the flue gas desulfurization, denitrification and dust removal system.
Disclosure of Invention
The to-be-solved technical problem of the utility model is to provide a dry coke quenching waste gas dust removal desulphurization unit, when adopting the device to handle the whole waste gas of dry coke quenching, can realize dust removal, SOx/NOx control and handle in the lump.
For solving above technical problem, the utility model provides a technical scheme is: a dry quenching waste gas dust removal and desulfurization device comprises an environmental dust remover with a plurality of filter chambers, wherein the filter chambers of the environmental dust remover are divided into a high-dust high-sulfur waste gas filter unit and a high-dust low-sulfur waste gas filter unit, and the high-dust high-sulfur waste gas filter unit and the high-dust low-sulfur waste gas filter unit are both composed of one or more filter chambers;
the high-dust high-sulfur waste gas filtering unit is provided with a high-dust high-sulfur waste gas deduster inlet and a high-dust high-sulfur waste gas deduster outlet; the inlet of the high-dust high-sulfur waste gas dust remover is connected with a high-dust high-sulfur waste gas collecting device, and the rear section of the outlet of the high-dust high-sulfur waste gas dust remover is sequentially connected with a desulfurizing tower, a denitration reactor and a coke oven smoke discharge chimney; the inlet end of the desulfurizing tower is connected with a coke oven flue gas main pipeline;
the high-dust low-sulfur waste gas filtering unit is provided with a high-dust low-sulfur waste gas deduster inlet and a high-dust low-sulfur waste gas deduster outlet; the inlet of the high-dust low-sulfur waste gas dust remover is connected with the high-dust low-sulfur waste gas collecting device, and the outlet of the high-dust low-sulfur waste gas dust remover is connected with the dry quenching waste gas discharge chimney.
Furthermore, an ash conveying system is arranged at the bottom of the filter chamber of the environmental dust collector, and the outlet end of the ash conveying system is connected with an ash bin.
Furthermore, a back flushing system is arranged at the top of the filter chamber of the environmental dust collector.
Furthermore, a high-dust high-sulfur waste gas induced draft fan is arranged on a connecting pipeline between the outlet of the high-dust high-sulfur dust remover and the desulfurizing tower.
Further, a coke oven flue gas induced draft fan is arranged on a connecting pipeline between the denitration reactor and the coke oven flue gas emission chimney.
Furthermore, a dry quenching waste gas draught fan is arranged on a connecting pipeline between an outlet of the high-dust low-sulfur waste gas dust remover and the dry quenching waste gas discharge chimney.
By adopting the dry quenching waste gas dedusting and desulfurizing device provided by the utility model, all the dry quenching waste gas can be dedusted by the deduster of the ground environment station, the dedusting device is not required to be rebuilt, and the dust can be collected together; the coke dry quenching high-dust and high-sulfur waste gas is introduced into a coke oven flue gas desulfurization and denitration device after dust removal, and a desulfurization device does not need to be built again. Compared with the prior art, the technology only needs to simply transform the dust remover of the ground environment station and additionally arrange a necessary draught fan and a necessary connecting pipeline, the device has high utilization rate, less investment, small occupied area and recoverable dust.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate exemplary embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention in any way.
FIG. 1 is a schematic diagram of the connection of the dry quenching waste gas dust removal and desulfurization device provided by the present invention.
In the figure, 1-a high-dust high-sulfur waste gas collecting device, 2-a high-dust high-sulfur waste gas pipeline, 3-an environmental dust remover, 4-a high-dust high-sulfur waste gas dust remover inlet, 5-a high-dust high-sulfur waste gas dust remover outlet, 6-an electric gate valve A, 7-a high-dust high-sulfur waste gas induced draft fan, 8-a coke oven flue gas main flue, 9-a desulfurizing tower, 10-a denitration reactor, 11-a coke oven flue gas induced draft fan, 12-a coke oven flue gas discharge chimney, 13-an electric gate valve B, 14-a high-dust low-sulfur waste gas collecting device, 15-a high-dust low-sulfur waste gas pipeline, 16-a high-dust waste gas low-sulfur dust remover inlet, 17-a high-dust low-sulfur waste gas dust remover outlet, 18-an electric gate valve C, 19-a coke quenching waste gas induced draft, 21-ash conveying system, 22-ash bin and 23-back blowing system.
Detailed Description
In order to make the present invention better understood by those skilled in the art, the present invention will be further clearly and completely described below with reference to the accompanying drawings and embodiments. In addition, the features of the embodiments and examples in the present application may be combined with each other without conflict.
As shown in fig. 1, a typical embodiment of the present invention provides a dry quenching exhaust gas dust removal and desulfurization device, which comprises an environmental dust collector 3 having a plurality of filter chambers, wherein the filter chambers of the environmental dust collector 3 are separated into a high-dust high-sulfur exhaust gas filter unit and a high-dust low-sulfur exhaust gas filter unit, and each of the high-dust high-sulfur exhaust gas filter unit and the high-dust low-sulfur exhaust gas filter unit is composed of one or more filter chambers. The number of the filter chambers to be separated is selected according to the discharge amount of the high-dust high-sulfur waste gas and the high-dust low-sulfur waste gas to be actually discharged, and the number of the filter chambers to be separated can be one or a combination of two or more. Referring to fig. 1, in the embodiment, the high-dust and high-sulfur exhaust gas filtering unit is divided into one filtering chamber, and the high-dust and low-sulfur exhaust gas filtering unit is divided into four filtering chambers.
The high-dust high-sulfur waste gas filtering unit is provided with a high-dust high-sulfur waste gas deduster inlet 4 and a high-dust high-sulfur waste gas deduster outlet 5; the inlet 4 of the high-dust high-sulfur waste gas dust remover is connected with the high-dust high-sulfur waste gas collecting device 1, and the rear section of the outlet 5 of the high-dust high-sulfur waste gas dust remover is sequentially connected with a desulfurizing tower 9, a denitration reactor 10 and a coke oven smoke discharge chimney 12. The desulfurization tower 9 and the denitration reactor 10 should have the capability of treating the waste gas after dry quenching and dust removal. The inlet end of the desulfurizing tower 9 is connected with a coke oven flue gas main pipeline 8.
Relatively specifically, a high-dust high-sulfur waste gas induced draft fan 7 is arranged on a connecting pipeline between the high-dust high-sulfur dust remover outlet 5 and the desulfurizing tower 9. A coke oven flue gas induced draft fan 11 is arranged on a connecting pipeline between the denitration reactor 10 and the coke oven flue gas emission chimney 12. An electric gate valve A6 is arranged on a connecting pipeline between the outlet 5 of the high-dust high-sulfur dust remover and the coke oven flue gas induced draft fan 11.
The high-dust low-sulfur waste gas filtering unit is provided with a high-dust low-sulfur waste gas deduster inlet 16 and a high-dust low-sulfur waste gas deduster outlet 17; an inlet 16 of the high-dust low-sulfur waste gas dust remover is connected with the high-dust low-sulfur waste gas collecting device 14, and an outlet 17 of the high-dust low-sulfur waste gas dust remover is connected with a dry quenching waste gas discharge chimney 20.
More specifically, a coke dry quenching exhaust gas draught fan 19 is arranged on a connecting pipeline between the high-dust low-sulfur exhaust gas dust collector outlet 17 and a coke dry quenching exhaust gas discharge chimney 20, the coke dry quenching exhaust gas draught fan 19 needs to meet the conveying capacity of all dry quenching exhaust gas, and the coke dry quenching exhaust gas discharge chimney 20 needs to meet the processing capacity of all dry quenching exhaust gas. An electric gate valve C18 is arranged on a connecting pipeline between the outlet 17 of the high-dust low-sulfur waste gas dust remover and the dry quenching waste gas induced draft fan 19.
The utility model relates to a separate filter chamber environment dust remover and adopt pulsed sack to remove dust, the design satisfies whole dry coke quenching exhaust-gas treatment ability, separates environment dust remover body filter chamber for two units according to the volume of high-dust low sulphur waste gas and high-dust high sulphur waste gas, and a unit satisfies the low sulphur waste gas dust removal of high-dust, and another unit satisfies the high sulphur waste gas dust removal of high-dust.
And respectively collecting the high-dust and low-sulfur waste gas and the high-dust and low-sulfur waste gas of the dry quenching coke. The high-dust high-sulfur waste gas is collected in a high-dust high-sulfur waste gas collecting device 1 and is input into a high-dust high-sulfur waste gas filtering unit through a high-dust high-sulfur waste gas pipeline 2 and an inlet 4 of a high-dust high-sulfur waste gas dust remover. The high-dust low-sulfur waste gas is collected in the high-dust low-sulfur waste gas collecting device 14 and enters the high-dust low-sulfur waste gas filtering unit through the high-dust low-sulfur waste gas pipeline 15 and the inlet 16 of the high-dust low-sulfur waste gas dust remover.
After being collected, the dry quenching high-dust high-sulfur waste gas is guided to a high-dust high-sulfur waste gas filtering unit of a dust remover of a ground environment station through a pipeline, the waste gas after dust removal is conveyed to a desulfurizing tower 9 through a high-dust high-sulfur waste gas induced draft fan 7 and then is converged with a coke oven flue gas main pipeline 8, and the converged flue gas is purified by a coke oven flue gas desulfurization and denitration device and then is discharged through a coke oven flue gas discharge chimney 12.
After the dry quenching high-dust low-sulfur waste gas is collected, the collected dry quenching high-dust low-sulfur waste gas is guided to a high-dust low-sulfur waste gas filtering unit of a dust collector of a ground environment station through a pipeline, and the dust-removed waste gas is conveyed to a dry quenching waste gas discharge chimney 20 through a dry quenching waste gas induced draft fan 19 to be discharged.
An electric gate valve B13 is arranged between a connecting pipeline of the outlet 5 of the high-dust high-sulfur dust remover and the electric gate valve A6 and between the outlet 17 of the high-dust low-sulfur waste gas dust remover and a connecting pipeline of the electric gate valve C18, when one or more of the desulfurizing tower 9, the denitration reactor 10 and the coke oven flue gas induced draft fan 11 breaks down, the electric gate valve A6 can be closed, the electric gate valve B13 is opened, and the high-sulfur waste gas can be discharged through the dry quenching waste gas induced fan 19 and the dry quenching waste gas discharge chimney 20.
The bottom of the filter chamber of the environmental dust collector 3 is provided with an ash conveying system 21, and the outlet end of the ash conveying system 21 is connected with an ash bin 22 for collecting dust. The top of the filter chamber of the environmental dust collector 3 is provided with a back-blowing system 23. The ash conveying system 21, the ash bin 22 and the back blowing system 23 share one set.
The scope of the invention is not limited to the above embodiments, and various modifications and changes may be made by those skilled in the art, and any modifications, improvements and equivalents made within the spirit and principle of the invention are intended to be included within the scope of the invention.
Claims (6)
1. A dry quenching waste gas dust removal and desulfurization device comprises an environmental dust remover with a plurality of filter chambers, and is characterized in that: the filter chamber of the environment dust collector is divided into a high-dust high-sulfur waste gas filter unit and a high-dust low-sulfur waste gas filter unit, and the high-dust high-sulfur waste gas filter unit and the high-dust low-sulfur waste gas filter unit are both composed of one or more filter chambers;
the high-dust high-sulfur waste gas filtering unit is provided with a high-dust high-sulfur waste gas deduster inlet and a high-dust high-sulfur waste gas deduster outlet; the inlet of the high-dust high-sulfur waste gas dust remover is connected with a high-dust high-sulfur waste gas collecting device, and the rear section of the outlet of the high-dust high-sulfur waste gas dust remover is sequentially connected with a desulfurizing tower, a denitration reactor and a coke oven smoke discharge chimney; the inlet end of the desulfurizing tower is connected with a coke oven flue gas main pipeline;
the high-dust low-sulfur waste gas filtering unit is provided with a high-dust low-sulfur waste gas deduster inlet and a high-dust low-sulfur waste gas deduster outlet; the inlet of the high-dust low-sulfur waste gas dust remover is connected with the high-dust low-sulfur waste gas collecting device, and the outlet of the high-dust low-sulfur waste gas dust remover is connected with the dry quenching waste gas discharge chimney.
2. The dry quenching exhaust gas dedusting and desulfurizing device according to claim 1, characterized in that: an ash conveying system is arranged at the bottom of a filter chamber of the environmental dust collector, and an outlet end of the ash conveying system is connected with an ash bin.
3. The dry quenching exhaust gas dedusting and desulfurizing device according to claim 1 or 2, characterized in that: the top of the filter chamber of the environmental dust collector is provided with a back flushing system.
4. The dry quenching exhaust gas dedusting and desulfurizing device according to claim 3, characterized in that: a high-dust high-sulfur waste gas draught fan is arranged on a connecting pipeline between the outlet of the high-dust high-sulfur dust remover and the desulfurizing tower.
5. The dry quenching exhaust gas dedusting and desulfurizing device according to claim 4, characterized in that: a coke oven flue gas induced draft fan is arranged on a connecting pipeline between the denitration reactor and the coke oven flue gas emission chimney.
6. The dry quenching exhaust gas dedusting and desulfurizing device according to claim 5, characterized in that: a dry quenching waste gas draught fan is arranged on a connecting pipeline between the outlet of the high-dust low-sulfur waste gas dust remover and the dry quenching waste gas discharge chimney.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115193233A (en) * | 2022-08-25 | 2022-10-18 | 金川集团股份有限公司 | Smelting flue gas treatment system and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115193233A (en) * | 2022-08-25 | 2022-10-18 | 金川集团股份有限公司 | Smelting flue gas treatment system and method |
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