CN211814525U - Treatment device for diffused gas at top of blast furnace - Google Patents
Treatment device for diffused gas at top of blast furnace Download PDFInfo
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- CN211814525U CN211814525U CN201921704672.5U CN201921704672U CN211814525U CN 211814525 U CN211814525 U CN 211814525U CN 201921704672 U CN201921704672 U CN 201921704672U CN 211814525 U CN211814525 U CN 211814525U
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Abstract
The utility model relates to a blast furnace top diffuses coal gas processing apparatus, its main constitution includes: the device comprises a blast furnace charging bucket, a blast furnace pressure-equalizing bleeding component, a coal gas lead-out pipe component, a furnace top bleeding valve, a coal gas primary dust remover, a coal gas final dust remover, a pressure reducing valve group, a clean coal gas pipe network, a coal gas ignition bleeding component, a pressure-equalizing coal gas recovery valve group, a dust filter, a coal gas ejector, a clean coal gas cutting valve group and the like. The device can recover the coal gas diffused by the large diffusing valve on the top of the blast furnace and can also completely recover the uniform pressure diffused coal gas, overcomes the defects that the existing large diffusing valve on the top of the blast furnace can not completely recover dust-containing coal gas discharged to the air, causes noise pollution and uniform pressure diffused coal gas, and realizes zero emission of the whole diffused coal gas on the top of the blast furnace. The zero discharge device for the top gas emission not only saves gas energy, but also avoids environmental pollution, has the advantages of high temperature resistance, high efficiency and green, and is suitable for the popularization of top gas recovery new construction and modification projects of various iron and steel enterprises.
Description
Technical Field
The utility model relates to a blast furnace top diffused gas treatment device, belonging to the field of blast furnace ironmaking equipment.
Technical Field
In recent years, with the growing environmental protection and climate problems, people have attracted high attention, and low-carbon, clean and efficient enterprises are bound to be built. In the smelting production process of the blast furnace, the gas discharged to the air from the top of the blast furnace mainly comprises the gas discharged from a large blow-off valve at the top of the blast furnace and the gas discharged by a charging bucket under the same pressure, the gas and the dust are directly discharged into the atmosphere along with the discharged gas, and the blast furnace gas is a mixed gas containing a large amount of CO and a small amount of toxic and combustible substances such as H2, CH4 and the like, so that the blast furnace gas causes serious pollution to the atmospheric environment, particularly the production area of the blast furnace, and the energy is wasted in vain. Moreover, the diffusion process generates a large amount of noise, which seriously affects nearby living areas, so that the diffused gas at the furnace top increasingly becomes the focus of supervision of environmental protection departments at all levels.
The coal gas diffused by the furnace top large diffusing valve is in a blast furnace blowing-in period or a blast furnace damping-down state, and is characterized by high temperature, high dust content, large discharge amount and irregular discharge interruption, and all steel enterprises diffusing the coal gas by the furnace top large diffusing valve directly discharge the coal gas to the air at present. The pressure-equalizing and bleeding coal gas of the charging bucket is used for depressurizing and bleeding high-pressure gas in the charging bucket before the charging bucket charges, the discharging temperature is relatively low, the quantity is small, the gas is interrupted and regular, at present, at home and abroad, the pressure-equalizing and bleeding coal gas of the furnace top mostly adopts a natural recovery process, the coal gas of the charging bucket cannot be completely recovered, and the rest coal gas of the charging bucket still needs to be bled to the air.
Disclosure of Invention
The utility model aims at: the furnace top gas bleeding device has the advantages of high efficiency, environmental protection and low energy consumption, can recover the gas bled by the furnace top large bleeding valve, can also completely recover the pressure-equalizing bleeding gas, overcomes the defects that the existing furnace top large bleeding valve discharges dusty gas to the air, causes noise pollution and cannot completely recover the pressure-equalizing bleeding gas, and realizes the zero discharge of the whole bleeding gas at the top of the blast furnace.
The utility model discloses main design: through the analysis to current blast furnace charge jar voltage-sharing diffusion system and the big work condition that diffuses of furnace roof to current system's analysis, creatively provide a blast furnace roof diffusion coal gas processing apparatus, add dust filter and gas ejector subassembly through blast furnace charging bucket exit end, realize the recovery to the material jar voltage-sharing diffusion coal gas, through addding the gas diffusion valves, diffuse coal gas recovery valves and nitrogen gas source as drawing the jet air supply, realize the purpose of the big zero release of furnace roof.
The technical scheme of the utility model: the utility model provides a blast furnace top diffuses coal gas processing apparatus, its mainly by blast furnace material jar, blast furnace voltage-sharing diffuse subassembly, coal gas derivation pipe subassembly, furnace top diffuse valve, the first dust remover of coal gas, the last dust remover of coal gas, pressure-reducing valve group, clean coal gas pipe network, coal gas ignition diffuse component and constitute, its characterized in that:
1) a pressure equalizing gas recovery valve group, a dust filter, a gas ejector and a clean gas cut-off valve group are sequentially arranged between the outlet of the blast furnace charge tank and the clean gas pipe network;
2) the outlet end of the gas final dust collector and the inlet end of the gas ejector are provided with connecting pipelines, and the connecting pipelines are provided with high-pressure clean gas cut-off valve groups;
3) a connecting pipeline is arranged between the outlet end of the primary dust remover and the inlet end of the dust filter, and a relief gas cut-off valve group is arranged on the connecting pipeline;
4) a diffused gas recovery valve group is arranged between the primary dust remover and the final dust remover;
5) and a connecting pipeline is arranged between the inlet end of the clean gas cutting valve group and the inlet end of the gas ignition and diffusion component, and a gas ignition and diffusion valve group is arranged on the connecting pipeline.
6) The inlet end of the coal gas ejector is connected with an external nitrogen pipeline, and a nitrogen cut-off valve group is arranged on the nitrogen pipeline;
and when the heat value, the oxygen content and the humidity of the diffused gas do not meet the technological requirements, the clean gas cut-off valve group is closed, the gas ignition and diffusion valve group is opened, and the gas is discharged after being ignited by the gas ignition and diffusion component.
Furthermore, in order to ensure the service life and the filtering efficiency of the dust filter, the filter screen of the dust filter is made of cordierite ceramic membrane or steel wire filter screen.
Furthermore, because the related medium of the system is coal gas, in order to ensure the safety of the system, the pressure equalizing coal gas recovery valve bank, the bleeding coal gas cut-off valve bank, the bleeding coal gas recovery valve bank, the high-pressure clean coal gas cut-off valve bank and the coal gas ignition bleeding valve bank are all composed of coal gas cut-off valves and sealing valves; the clean gas shut-off valve group consists of a check valve, a gas shut-off valve and a sealing valve; the nitrogen gas shut-off valve group consists of a shut-off valve and a sealing valve.
Further, the primary dust remover structure is a gravity dust remover or a cyclone dust remover.
Furthermore, the structure of the final dust collector is full-dry cloth bag dust collection or wet dust collection.
The utility model discloses the main beneficial effect who produces lies in:
1. the coal gas is diffused from the top of the furnace to realize the whole zero emission. When the blast furnace stops blowing, black smoke and noise are not generated after the furnace top is provided with the dispersion valve; after the top charging bucket is discharged, the upper sealing valve can be directly opened without opening the pressure-equalizing discharge valve, and the next top charging process is carried out.
2. The recovery rate of the byproduct blast furnace gas is improved, and the process energy consumption and the production cost are further reduced. The coal gas discharged from the top of the furnace is not discharged to the outside, thereby recovering the energy of the blast furnace gas to the maximum extent and having obvious economic benefit.
3. And environmental pollution is avoided. After the top large bleeding valve and the blast furnace charging bucket all recycle, the pollution of the blast furnace gas to the surrounding atmosphere and noise is avoided, and the environmental protection effect is outstanding.
Drawings
The utility model has 1 page of attached drawings and 1 page in total.
Fig. 1 is a schematic diagram of embodiment 1 of the present invention.
The labels in the figures illustrate: 1-pressure equalizing gas recovery valve group; 2-clean gas pipe network; 3-dust filter; 4-gas ejector; 5-clean gas cut-off valve group; 6-high pressure clean gas cut-off valve group; 7-relief gas cut-off valve group; 8-nitrogen gas shut-off valve group; 9-relief gas recovery valve group; 10-gas ignition and diffusion valve group; 11-blast furnace; 12-material tank; 13-a gas outlet pipe assembly; 14-gas composition analyzer; 15-furnace top bleeding valve; 16-gas primary dust remover; 17-gas final dust remover; 18-a pressure relief valve bank; 19-a gas ignition and diffusion component; 20-pressure equalizing and diffusing component.
Detailed Description
The present invention will be described with reference to the following embodiments and drawings.
This embodiment is shown in FIG. 1.
The embodiment relates to two typical working conditions, which are recovery of pressure-equalizing coal gas under the pressure-equalizing bleeding working condition of normal production of the blast furnace 11 and recovery of top bleeding coal gas under the fault maintenance and damping-down working conditions of the blast furnace 11.
The recovery process of the coal gas diffused from the furnace top during the working conditions of 11-degree fault maintenance and damping down of the blast furnace: when the blast furnace 11 needs to be opened for bleeding, the bleeding gas recovery valve group 9, the pressure equalizing gas recovery valve group 1 and the high-pressure clean gas cut-off valve group 6 are closed in sequence, the bleeding gas cut-off valve group 7 is opened at the same time, after the gas in the blast furnace 11 passes through the primary dust collector 16, the bleeding gas cut-off valve group 7, the dust filter 3, the gas ejector 4 and the gas component analyzer 14 in sequence, if the gas (heat value, oxygen content and humidity) measured by the gas component analyzer 14 meets the process requirements, the clean gas cut-off valve group 5 is opened, the gas ignition bleeding valve group 10 is closed, and the bleeding gas enters the clean gas pipe network 2 to be supplied to downstream users for use; if the gas (heat value, oxygen content and humidity) measured by the gas composition analyzer 14 does not meet the process requirements, the clean gas cut-off valve set 5 is closed, the gas ignition and diffusion valve set 10 is opened, the diffused gas enters the gas ignition and diffusion component 19 to be ignited and diffused, and the diffused gas is the gas purified by the dust filter 3 at the moment and cannot cause pollution to the environment. When the bleeding lasts for a certain time and the pressure in the blast furnace 11 is lower than the set pressure of 10kPa, the nitrogen cut-off valve group 8 is opened, the injection effect on the bleeding gas is realized through high-pressure nitrogen, the bleeding speed is accelerated, the pressure in the blast furnace 11 is reduced to the normal pressure, and therefore the large bleeding valve on the furnace top is not opened in the states of blast furnace maintenance and damping down, and zero discharge of damping down gas is realized.
The recovery of the pressure-equalizing coal gas in the pressure-equalizing diffusion working condition of the normal production of the blast furnace 11: under the working condition, the bleeding gas recovery valve group 9 and the clean gas cutting valve group 5 are in a normally open state, the bleeding gas cutting valve group 7 and the nitrogen cutting valve group 8 are in a normally closed state, when the discharging of a charging bucket 12 at the top of a blast furnace 11 is finished and the pressure-sharing gas needs to be bled, the pressure-sharing gas recovery valve group 1 is opened, the pressure-sharing gas is discharged from the charging bucket 12, the gas sequentially passes through the dust filter 3, the gas ejector 4, the gas composition analyzer 14 and the clean gas cutting valve group 5 and enters a clean gas pipe network 2, when the pressure in the charging bucket 12 is reduced to set 30kPa, the high-pressure gas cutting valve group 6 is opened, the injection effect on the pressure-sharing gas is realized through the high-pressure gas, the bleeding speed is accelerated, the pressure of the charging bucket reaches below 2kPa and is higher than the atmospheric pressure, the pressure of the charging bucket is completed, the pressure-sharing bleeding process of the, and (4) zero discharge of pressure-equalizing coal gas.
It should be noted that: the above embodiments are all individual cases of the present invention, and one of their functions is to facilitate understanding of the present invention, and should not be considered as limiting the present invention.
Claims (7)
1. The utility model provides a blast furnace top diffuses coal gas processing apparatus, its main blast furnace weigh bucket, blast furnace voltage-sharing diffuse subassembly, coal gas derivation pipe subassembly, furnace top diffuse valve, the first dust remover of coal gas, the last dust remover of coal gas, pressure-reducing valve group, clean coal gas pipe network, coal gas ignition diffuse component and constitute, its characterized in that:
1) a pressure equalizing gas recovery valve group, a dust filter, a gas ejector and a clean gas cut-off valve group are sequentially arranged between the outlet of the blast furnace charge tank and the clean gas pipe network;
2) the outlet end of the gas final dust collector and the inlet end of the gas ejector are provided with connecting pipelines, and the connecting pipelines are provided with high-pressure clean gas cut-off valve groups;
3) a connecting pipeline is arranged between the outlet end of the primary dust remover and the inlet end of the dust filter, and a relief gas cut-off valve group is arranged on the connecting pipeline;
4) a diffused gas recovery valve group is arranged between the primary dust remover and the final dust remover;
5) a connecting pipeline is arranged between the inlet end of the clean gas cut-off valve group and the inlet end of the ignition and diffusion component, and a gas ignition and diffusion valve group is arranged on the connecting pipeline;
6) the inlet end of the coal gas ejector is connected with an external nitrogen pipeline, and a nitrogen cut-off valve group is arranged on the nitrogen pipeline.
2. The blast furnace top diffused gas treatment device according to claim 1, characterized in that: the material of the filter material of the dust filter is cordierite ceramic membrane or steel wire filter screen.
3. The blast furnace top diffused gas treatment device according to claim 1, characterized in that: the pressure equalizing gas recovery valve bank, the bleeding gas cut-off valve bank, the bleeding gas recovery valve bank, the high-pressure clean gas cut-off valve bank and the gas ignition bleeding valve bank are all composed of gas cut-off valves and sealing valves.
4. The blast furnace top diffused gas treatment device according to claim 1, characterized in that: the clean gas shut-off valve group comprises a check valve, a gas shut-off valve and a sealing valve.
5. The blast furnace top diffused gas treatment device according to claim 1, characterized in that: the nitrogen gas shut-off valve group comprises a shut-off valve and a sealing valve.
6. The blast furnace top diffused gas treatment device according to claim 1, wherein the primary dust collector is a gravity dust collector or a cyclone dust collector.
7. The device for treating the diffused gas at the top of the blast furnace as claimed in claim 1, wherein the structure of the final dust collector is full-dry cloth bag dust collection or wet dust collection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201921704672.5U CN211814525U (en) | 2019-10-12 | 2019-10-12 | Treatment device for diffused gas at top of blast furnace |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921704672.5U CN211814525U (en) | 2019-10-12 | 2019-10-12 | Treatment device for diffused gas at top of blast furnace |
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| CN211814525U true CN211814525U (en) | 2020-10-30 |
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| CN201921704672.5U Active CN211814525U (en) | 2019-10-12 | 2019-10-12 | Treatment device for diffused gas at top of blast furnace |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115386663A (en) * | 2022-08-30 | 2022-11-25 | 马鞍山钢铁股份有限公司 | Intelligent ignition method and system for blast furnace top |
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2019
- 2019-10-12 CN CN201921704672.5U patent/CN211814525U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115386663A (en) * | 2022-08-30 | 2022-11-25 | 马鞍山钢铁股份有限公司 | Intelligent ignition method and system for blast furnace top |
| CN115386663B (en) * | 2022-08-30 | 2023-06-23 | 马鞍山钢铁股份有限公司 | Intelligent ignition method and ignition system for blast furnace top |
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