CN214655037U - Blast furnace gas desulfurization device - Google Patents
Blast furnace gas desulfurization device Download PDFInfo
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- CN214655037U CN214655037U CN202022262108.1U CN202022262108U CN214655037U CN 214655037 U CN214655037 U CN 214655037U CN 202022262108 U CN202022262108 U CN 202022262108U CN 214655037 U CN214655037 U CN 214655037U
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Abstract
The utility model provides a blast furnace gas desulphurization device, which comprises a desulphurization system; the desulfurization system comprises a pretreatment tower and a desulfurization tower; a solid coal gas purifying agent layer is arranged in the pretreatment tower, and a dry dust removal device is connected with an air inlet of the pretreatment tower; the desulfurization tower is internally provided with a medium-temperature solid desulfurizer layer, the gas inlet of the desulfurization tower is connected with the gas outlet of the pretreatment tower, and the gas outlet of the desulfurization tower is connected with a blast furnace gas excess pressure turbine power generation device. Utilize the utility model discloses can solve present hydrolysis + wet flue gas desulfurization technology and have that technology is complicated, absorption liquid circulation volume is big, area is big, have waste water to produce the scheduling problem.
Description
Technical Field
The utility model belongs to the technical field of exhaust-gas treatment, more specifically relates to a blast furnace gas desulphurization unit.
Background
During the iron-smelting process, a large amount of gas is generated from the iron-smelting blast furnace, the blast furnace gas contains a certain amount of sulfide, and the sulfide of the blast furnace gas mainly exists in the form of organic sulfur COS and contains a certain amount of inorganic sulfur H through detection2And S. Blast furnace gas is mostly used as fuel, and a large amount of SO is generated after combustion2Due to national Pair of SO2Has the requirements of relevant emission standards, SO downstream users need to set SO removal2The device adopts the characteristics of large gas quantity of blast furnace gas and numerous downstream users to remove SO at the rear end2The process causes the problems of large overall investment, large occupied area of equipment and high management cost, and furthermore, SO is generated along with the country2The emission standard is stricter, and the back end is subjected to SO removal2The problems caused by the process are more obvious, and the method has great benefits in the aspects of economy, environmental protection and benefit for controlling the sulfur-containing problem of the blast furnace gas from the source.
At present, for H2The technology for removing S is a well-established process, but blast furnace gas contains sulfur which has the characteristics of inorganic sulfur H2S also contains organic sulfur (mainly COS), wherein the organic sulfur is the main component, and the blast furnace gas contains a certain amount of impurities such as dust, oil, water and the like, and the process characteristics (temperature and pressure) of the blast furnace gas, so that the blast furnace gas is finely removedSulfur technology requires some specificity.
Blast furnace gas desulfurization is a new field at present, has no mature technical application, and is the most commonly used process of hydrolysis and wet desulfurization at present, wherein a hydrolysis catalyst is adopted to hydrolyze carbonyl sulfide (COS) into inorganic sulfur H in front of a TRT (blast furnace gas top pressure turbine power generation) device2S, then the coal gas enters a TRT power generation device, a wet desulphurization device is arranged behind the TRT device, and H in the coal gas is removed2S removal and wet desulphurization are divided into a chemical absorption method and a catalytic oxidation method, wherein the chemical absorption method takes sodium hydroxide alkali liquor as an absorbent and uses an acid-base neutralization chemical absorption mode to remove H2S is removed, finally sodium sulfide salt is generated and enters wastewater, a certain amount of wastewater is generated in the process, the catalytic oxidation wet desulphurization takes alkaline salt solution as a medium, catalyst and H are added into the alkaline salt solution2S is absorbed and finally converted into elemental sulfur, the process is relatively complex, the circulating amount of absorption liquid is large, and the equipment investment and the occupied area are relatively large.
SUMMERY OF THE UTILITY MODEL
In view of the above problems, the present invention is to provide a blast furnace gas desulfurization device to solve the problems of complex process, large circulation of absorption liquid, large floor area, waste water generation, etc. in the current hydrolysis and wet desulfurization process.
The utility model provides a blast furnace gas desulphurization device, which comprises a desulphurization system; wherein the desulfurization system comprises a pretreatment tower and a desulfurization tower; a solid coal gas purifying agent layer is arranged in the pretreatment tower, and a dry dust removal device is connected with an air inlet of the pretreatment tower; the desulfurization tower is internally provided with a medium-temperature solid desulfurizer layer, the gas inlet of the desulfurization tower is connected with the gas outlet of the pretreatment tower, and the gas outlet of the desulfurization tower is connected with a blast furnace gas excess pressure turbine power generation device.
In addition, the preferred scheme is that the dry dedusting device comprises a gravity deduster connected with a smoke outlet of the blast furnace and a bag deduster connected with an air outlet of the gravity deduster; and the air outlet of the bag-type dust collector is connected with the air inlet of the pretreatment tower.
In addition, the preferable scheme is that the pretreatment tower comprises a pretreatment tower body, an air inlet of the pretreatment tower is arranged at the lower part of the pretreatment tower body, the solid gas purifying agent layer is arranged at the middle part inside the pretreatment tower body, and an air outlet of the pretreatment tower is arranged at the top of the pretreatment tower body.
In addition, the preferable scheme is that the desulfurizing tower comprises a desulfurizing tower body, an air inlet of the desulfurizing tower is arranged at the lower part of the desulfurizing tower body, the medium-temperature solid desulfurizing agent layer is arranged in the middle of the inside of the desulfurizing tower body, and an air outlet of the desulfurizing tower is arranged at the top of the desulfurizing tower body.
In addition, the preferable scheme is that at least two groups of desulfurization systems are connected with the air outlet of the dry dedusting device through a pipeline.
In addition, the preferable scheme is that a first cut-off valve is respectively arranged on a pipeline connecting an air outlet of the dry dust removal device and each group of desulfurization systems.
In addition, preferably, a second stop valve is arranged at the air outlet of the desulfurizing tower of each group of desulfurizing systems.
In addition, a bypass adjusting pipeline is preferably arranged between the dry dust removal device and the blast furnace gas residual pressure turbine power generation device; and the bypass adjusting pipeline is respectively provided with an adjusting valve and a third cut-off valve.
In addition, preferably, a pressure reducing valve bank is further connected to the gas outlet of the desulfurizing tower.
According to the above technical scheme, the utility model provides a blast furnace gas desulphurization unit, carry out preliminary dust removal to blast furnace gas through dry process dust collector, then further detach the dust in the blast furnace gas after preliminary dust removal through the pretreatment tower, impurity components such as oil, the blast furnace gas after rethread desulphurization tower is handled to the pretreatment tower carries out the desulfurization, be provided with medium temperature type solid desulfurizer layer in the desulfurization tower, hydrogen sulfide component and most carbonyl sulphur component in the blast furnace gas are high-efficient desorption to the waste heat that can make full use of blast furnace gas, the blast furnace gas after the desulfurization gets into blast furnace gas excess pressure turbine power generation facility and recycles, improve the economic nature and the security of blast furnace gas desulfurization; the utility model has the advantages of no waste water generation in the whole blast furnace gas desulfurization process, small occupied area of the whole device, equipment investment cost saving, simple process flow, good desulfurization effect and the like.
Drawings
Other objects and results of the invention will be more apparent and readily appreciated by reference to the following description taken in conjunction with the accompanying drawings, and as the invention is more fully understood. In the drawings:
FIG. 1 is a schematic structural diagram of a blast furnace gas desulfurization unit according to an embodiment of the present invention;
fig. 2 is a process flow diagram for desulfurizing blast furnace gas according to an embodiment of the present invention.
In the attached figure, 1-blast furnace, 2-pretreatment tower, 21-gas purifying agent layer, 22-gas inlet of pretreatment tower, 23-gas outlet of pretreatment tower, 3-desulfurization tower, 31-medium temperature type solid desulfurizing agent layer, 32-gas inlet of desulfurization tower, 33-gas outlet of desulfurization tower, 4-blast furnace gas residual pressure turbine power generation device, 5-gravity dust remover, 6-bag dust remover, 7-first cut-off valve, 8-second cut-off valve, 9-bypass adjusting pipeline, 91-adjusting valve, 92-third cut-off valve and 93-pressure reducing valve group.
The same reference numbers in all figures indicate similar or corresponding features or functions.
Detailed Description
In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of one or more embodiments. It may be evident, however, that such embodiment(s) may be practiced without these specific details.
Aiming at the problems of complex process, large circulation of absorption liquid, large occupied area, waste water generation and the like of the conventional hydrolysis and wet desulphurization process, the blast furnace gas desulphurization device is provided.
Specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
In order to explain the blast furnace gas desulfurization apparatus provided by the present invention, fig. 1 shows the structure of the blast furnace gas desulfurization apparatus according to the embodiment of the present invention.
As shown in fig. 1, the blast furnace gas desulfurization device provided by the present invention comprises a desulfurization system; wherein, the desulfurization system comprises a pretreatment tower 2 and a desulfurization tower 3; a solid gas purifying agent layer 21 is arranged in the pretreatment tower 2, and a dry dust removal device is connected with an air inlet of the pretreatment tower 2; a medium-temperature solid desulfurizer layer 31 is arranged in the desulfurizing tower 3, the gas inlet of the desulfurizing tower 3 is connected with the gas outlet of the pretreatment tower 2, and the gas outlet of the desulfurizing tower 3 is connected with a blast furnace gas excess pressure turbine power generation device 4.
The blast furnace gas is subjected to preliminary dust removal through a dry dust removal device, then impurity components such as dust and oil in the blast furnace gas subjected to preliminary dust removal are further removed through a pretreatment tower 2, the blast furnace gas subjected to pretreatment in the pretreatment tower is desulfurized through a desulfurization tower 3, a medium-temperature solid desulfurizer layer 31 is arranged in the desulfurization tower 3, the hydrogen sulfide components in the blast furnace gas can be efficiently removed and most of carbonyl sulfide components can be removed by fully utilizing the waste heat of the blast furnace gas, and the desulfurized blast furnace gas enters a blast furnace gas residual pressure turbine power generation device 4 for reuse, so that the economy and the safety of blast furnace gas desulfurization are improved; the utility model has the advantages of no waste water generation in the whole blast furnace gas desulfurization process, small occupied area of the whole device, equipment investment cost saving, simple process flow, good desulfurization effect and the like.
As the preferred scheme of the utility model, the dry dedusting device comprises a gravity deduster 5 connected with the smoke outlet of the blast furnace 1 and a bag deduster 6 connected with the air outlet of the gravity deduster 5; the air outlet of the bag-type dust collector 6 is connected with the air inlet of the pretreatment tower 2. The blast furnace gas generated from the blast furnace 1 can be subjected to primary dust removal treatment through the gravity dust remover 5 and the bag-type dust remover 6, and the gravity dust remover 5 can make larger-particle dust in the blast furnace gas separated from the gas under the action of gravity and inertia force and settle to the conical bottom part of the dust remover by suddenly reducing the flow velocity of the gas flow and changing the flow direction; the bag-type dust collector 6 can further filter the blast furnace gas roughly removed by the gravity dust collector 5.
As the preferred scheme of the utility model, the pretreatment tower 2 comprises a pretreatment tower body, the air inlet 22 of the pretreatment tower is arranged at the lower part of the pretreatment tower body, the solid coal gas purifying agent layer 21 is arranged at the middle part inside the pretreatment tower body, and the air outlet 23 of the pretreatment tower is arranged at the top of the pretreatment tower body. The blast furnace gas enters the lower part of the interior of the pretreatment tower 2 from the gas inlet 22 of the pretreatment tower at the lower part, and the gas passes through the solid gas purifying agent layer 21 to achieve the effect of gas purification, so as to remove impurity components such as dust, oil and the like in the blast furnace gas.
The solid gas purifying agent layer 21 is preferably a molecular sieve layer, but may be replaced by other solid purifying agents, and is not particularly limited as long as impurities such as dust and oil in the gas can be adsorbed.
As the preferred scheme of the utility model, desulfurizing tower 3 includes the desulfurizing tower body, and the air inlet 32 setting of desulfurizing tower is in the lower part of desulfurizing tower body, and middle temperature type solid desulfurizing agent layer 31 sets up at the inside middle part of desulfurizing tower body, and the gas outlet 33 setting of desulfurizing tower is at the top of desulfurizing tower body. The purified coal gas enters the inside of the desulfurizing tower 3 from the gas inlet 32 of the desulfurizing tower at the lower part of the desulfurizing tower body, is desulfurized through the medium-temperature solid desulfurizing agent layer 31, and the desulfurized coal gas is discharged from the gas outlet 33 at the upper part.
The middle-temperature type solid desulfurizer layer 31 is preferably a desulfurizer layer composed of zinc oxide-containing desulfurizer, the waste heat of blast furnace gas is about 200 ℃, the desulfurization effect of the middle-temperature type solid desulfurizer layer 31 on the gas is optimal at the temperature, and the purpose of fully utilizing the waste heat of the gas and achieving the optimal desulfurization effect can be achieved.
As the preferred scheme of the utility model, the gas outlet of the dry dust removal device is connected with at least two groups of desulfurization systems through pipelines. The preferred two sets of desulfurization systems of this embodiment, one opens one and stands by, can carry out the operation of switching over each other, realizes the function of overhauing, changing equipment and continuous production.
As the preferred scheme of the utility model, the gas outlet of the dry dust collector and the pipeline connected with each group of desulfurization systems are respectively provided with a first cut-off valve 7. The mutual switching of the two groups of desulfurization systems is facilitated through the first stop valve 7.
As the preferred scheme of the utility model, the gas outlet 33 department at the desulfurizing tower of every group desulfurization system is provided with second trip valve 8. The control of the gas emission after the desulfurization treatment is facilitated through the second stop valve 8.
As the preferred scheme of the utility model, a bypass adjusting pipeline 9 is arranged between the dry dust removing device and the blast furnace gas residual pressure turbine generating set 4; the bypass adjusting pipe 9 is provided with an adjusting valve 91 and a third shut-off valve 92. Through the bypass adjusting pipeline 9, the adjusting valve 91 and the third cut-off valve 92, the amount of the coal gas entering the desulfurization system can be adjusted according to the content of sulfide in the blast furnace gas and the achieved desulfurization effect, and the economy and the safety of coal gas desulfurization are improved.
As the preferred scheme of the utility model, the gas outlet 33 of the desulfurizing tower is also connected with a pressure reducing valve group 93. The flow of the desulfurized gas is controlled and adjusted through the pressure reducing valve group 93, and the safety is improved.
As shown in fig. 2, the process of desulfurizing blast furnace gas by using the blast furnace gas desulfurizing device provided by the utility model is as follows:
s1, performing dry dedusting treatment on blast furnace gas entering from a smoke outlet of the blast furnace by using a dry dedusting device to obtain blast furnace gas subjected to preliminary dedusting;
s2, purifying the blast furnace gas subjected to preliminary dust removal through a pretreatment tower to obtain purified blast furnace gas;
s3, carrying out desulfurization treatment on the purified blast furnace gas through a desulfurization tower to obtain the blast furnace gas to be used;
and S4, reusing the blast furnace gas to be used by the blast furnace gas residual pressure turbine generating device.
Utilize the utility model provides a blast furnace gas desulphurization unit carries out desulfurization treatment, simple process, desulfurization effect good to the blast furnace gas through above-mentioned blast furnace gas desulfurization process.
According to the above-mentioned embodiment, the utility model provides a blast furnace gas desulphurization unit, carry out preliminary dust removal to blast furnace gas through the dry process dust collector, then further detach the dust in the blast furnace gas after preliminary dust removal through the pretreatment tower, impurity components such as oil, the blast furnace gas after the pretreatment tower is handled is desulfurized through the desulfurization tower again, be provided with medium temperature type solid desulfurizer layer in the desulfurization tower, can make full use of the waste heat of blast furnace gas high-efficient desorption hydrogen sulfide component in the blast furnace gas and desorption most carbonyl sulphur component, the blast furnace gas after the desulfurization gets into blast furnace gas excess pressure turbine power generation facility and recycles, improve the economic nature and the security of blast furnace gas desulfurization; the utility model has the advantages of no waste water generation in the whole blast furnace gas desulfurization process, small occupied area of the whole device, equipment investment cost saving, simple process flow, good desulfurization effect and the like.
The blast furnace gas desulfurization apparatus according to the present invention has been described above by way of example with reference to the accompanying drawings. However, it will be appreciated by those skilled in the art that various modifications may be made to the blast furnace gas desulfurization apparatus of the present invention without departing from the scope of the invention. Therefore, the scope of the present invention should be determined by the content of the appended claims.
Claims (9)
1. The blast furnace gas desulfurization device is characterized by comprising a desulfurization system; wherein the content of the first and second substances,
the desulfurization system comprises a pretreatment tower and a desulfurization tower;
a solid coal gas purifying agent layer is arranged in the pretreatment tower, and a dry dust removal device is connected with an air inlet of the pretreatment tower;
the desulfurization tower is internally provided with a medium-temperature solid desulfurizer layer, the gas inlet of the desulfurization tower is connected with the gas outlet of the pretreatment tower, and the gas outlet of the desulfurization tower is connected with a blast furnace gas excess pressure turbine power generation device.
2. The blast furnace gas desulfurization apparatus according to claim 1,
the dry dust removal device comprises a gravity dust remover connected with a smoke outlet of the blast furnace and a bag-type dust remover connected with an air outlet of the gravity dust remover;
and the air outlet of the bag-type dust collector is connected with the air inlet of the pretreatment tower.
3. The blast furnace gas desulfurization apparatus according to claim 1,
the pretreatment tower comprises a pretreatment tower body, wherein an air inlet of the pretreatment tower is arranged at the lower part of the pretreatment tower body, a solid coal gas purifying agent layer is arranged at the middle part inside the pretreatment tower body, and an air outlet of the pretreatment tower is arranged at the top of the pretreatment tower body.
4. The blast furnace gas desulfurization apparatus according to claim 1,
the desulfurizing tower comprises a desulfurizing tower body, wherein an air inlet of the desulfurizing tower is formed in the lower portion of the desulfurizing tower body, a medium-temperature solid desulfurizing agent layer is formed in the middle of the inside of the desulfurizing tower body, and an air outlet of the desulfurizing tower is formed in the top of the desulfurizing tower body.
5. The blast furnace gas desulfurization apparatus according to claim 1,
and the air outlet of the dry dust removal device is connected with at least two groups of desulfurization systems through pipelines.
6. The blast furnace gas desulfurization apparatus according to claim 5,
and a first cut-off valve is respectively arranged on a pipeline connecting the air outlet of the dry dust removal device with each group of desulfurization systems.
7. The blast furnace gas desulfurization apparatus according to claim 5,
and a second stop valve is arranged at the gas outlet of the desulfurizing tower of each group of desulfurizing systems.
8. The blast furnace gas desulfurization apparatus according to claim 1,
a bypass adjusting pipeline is arranged between the dry dust removal device and the blast furnace gas residual pressure turbine power generation device;
and the bypass adjusting pipeline is respectively provided with an adjusting valve and a third cut-off valve.
9. The blast furnace gas desulfurization apparatus according to claim 1,
and the gas outlet of the desulfurizing tower is also connected with a pressure reducing valve group.
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| CN202022262108.1U CN214655037U (en) | 2020-10-12 | 2020-10-12 | Blast furnace gas desulfurization device |
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| CN202022262108.1U CN214655037U (en) | 2020-10-12 | 2020-10-12 | Blast furnace gas desulfurization device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112210632A (en) * | 2020-10-12 | 2021-01-12 | 北京中冶设备研究设计总院有限公司 | Blast furnace gas desulfurization device and method |
| CN115287102A (en) * | 2022-08-25 | 2022-11-04 | 南京澳博工业智能科技研究院有限公司 | Wet catalyst oxidation desulfurization system based on hypergravity bed |
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2020
- 2020-10-12 CN CN202022262108.1U patent/CN214655037U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112210632A (en) * | 2020-10-12 | 2021-01-12 | 北京中冶设备研究设计总院有限公司 | Blast furnace gas desulfurization device and method |
| CN115287102A (en) * | 2022-08-25 | 2022-11-04 | 南京澳博工业智能科技研究院有限公司 | Wet catalyst oxidation desulfurization system based on hypergravity bed |
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