CN218910412U - Blast furnace damping down and diffusing gas purifying and recycling system - Google Patents
Blast furnace damping down and diffusing gas purifying and recycling system Download PDFInfo
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- CN218910412U CN218910412U CN202223510600.1U CN202223510600U CN218910412U CN 218910412 U CN218910412 U CN 218910412U CN 202223510600 U CN202223510600 U CN 202223510600U CN 218910412 U CN218910412 U CN 218910412U
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Abstract
The utility model discloses a blast furnace damping down and diffusing gas purifying and recycling system. Comprising the following steps: comprises a ball joint, a primary cyclone coarse dust removal system, a gas boosting system and a secondary cloth bag dust removal and recovery pipeline which are connected in sequence through a pipeline. The utility model fully considers the safety and practicability of the blast furnace damping-down and diffusing gas purification recovery, and the recovered gas can bring certain economic benefit to enterprises, but more importantly, the pollution of the conventional damping-down and diffusing gas to the atmosphere and the damage to the surrounding environment are avoided, and the utility model has higher social benefit.
Description
Technical Field
The utility model relates to the technical field of blast furnace ironmaking, in particular to a blast furnace gas purifying and recycling system which is diffused under the condition of blast furnace damping down.
Background
From the current blast furnace ironmaking production process, the blast furnace needs routine maintenance at regular intervals to ensure good production state of the blast furnace, so that during regular maintenance, the blast furnace is in damping down, high-pressure gas in the blast furnace is discharged outwards through a gas discharge valve arranged at the highest position of the furnace top, and the blast furnace reaches a normal pressure state, thereby being convenient for safe maintenance and maintenance. In addition, in the blast furnace production process, temporary emergency damping down is also required when the economic condition is met, and emergency repair is arranged to restore normal production. When the blast furnace is in damping down, the high-pressure gas in the blast furnace is directly discharged into the atmosphere, and the gas contains a large amount of powder bins, CO and CO 2 And other toxic and combustible substances, serious pollution is caused to the atmosphere, and the dissipation of a large amount of coal gas also causes energy waste. Meanwhile, in the air diffusing process of the high-pressure gas, larger noise can be generated, and certain noise pollution can be caused to the surrounding environment.
In the past, a plurality of blast furnaces in production are currently in production, most of the blast furnaces are not provided with a damping down and releasing gas purifying and recycling system, and the temporary and short-time damping down and releasing gas is considered to not pollute the current surrounding environment, but thousands of blast furnaces in China are considered to be not a small number in damping down and releasing gas quantity in periodic maintenance every year.
No matter the environmental protection requirement of the country or the place is improved or the environmental protection wound A in the steel industry is improved, enterprises are required to carry out green development, the emission of various pollutants is reduced or lowered, the aim of zero emission is achieved, and the green sustainable development is realized. Especially in the current 'double carbon' background, the reduction of carbon emission in the blast furnace production process is more important. Therefore, the treatment of blast furnace damping down and releasing coal gas is also reasonable, and the treatment range is brought into the recovery treatment range, so that the purification and recovery are imperative.
Disclosure of Invention
In order to overcome the defects, the utility model provides a blast furnace damping-down and diffusing gas purifying and recycling system, which can be used for purifying the damping-down and diffusing blast furnace gas and recycling the blast furnace damping-down and diffusing blast furnace gas to a blast furnace purifying gas pipe network in a factory, so that on one hand, the problem of pollution to the environment caused by air emission is solved, and on the other hand, the system is also a means for reducing carbon emission and assisting carbon emission reduction of iron and steel enterprises.
In order to achieve the aim, the utility model provides a blast furnace damping down and diffusing gas purifying and recycling system, which comprises a ball joint, a primary cyclone coarse dust removal system, a gas boosting system and a secondary cloth bag dust removal which are sequentially connected through pipelines;
the primary cyclone coarse dust removal system comprises a cyclone dust remover connected with the top of a ball joint and the top of a downpipe through a gas pipeline;
the secondary bag dust removal comprises a bag dust remover connected with a gas outlet of the primary cyclone dust remover through a pipeline and a pipeline connected with a gas outlet of the bag dust remover and connected with a clean gas pipe network.
Further, the ball joint is also provided with an accident bleeding valve.
Further, the gas boosting system comprises an injection boosting device, a high-pressure gas source pipeline and a valve device on the pipeline.
Further, the device also comprises a nitrogen sweeping system, wherein the nitrogen sweeping system comprises a nitrogen sweeping pipeline connected to the gas inlet of the primary cyclone dust collector and valve equipment.
Further, the gas recovery device also comprises a diffusing system, wherein the diffusing system comprises a diffusing pipeline and valve equipment which are arranged at the top of the gas recovery pipeline and the top of the bag-type dust collector.
Further, an emergency diffusing pipe is arranged on the ball joint, and a gas diffusing valve is arranged at the tail end of the emergency diffusing pipe.
The utility model fully considers the safety and practicability of the blast furnace damping-down and diffusing gas purification recovery, and the recovered gas can bring certain economic benefit to enterprises, but more importantly, the pollution of the conventional damping-down and diffusing gas to the atmosphere and the damage to the surrounding environment are avoided, and the utility model has higher social benefit.
Drawings
FIG. 1 is a flow chart of the present utility model.
1.1/1.2 of ascending pipe, 2 of ball joint, 3 of descending pipe, 4.1/4.2 of recovery/diffusion pipe, 4.3 of diffusion pipe, 5 of emergency diffusion valve, 6.1/6.2/6.3 of blind plate valve, 7.1/7.2/7.3 of recovery valve, 8.1/8.2 of ash discharge valve, 9.1/9.2 of cyclone dust collector, 10.1/10.2/10.3/10.4 of gas recovery pipeline, 11 of bag dust collector, 12 of nitrogen purge pipeline, 13.1/13.2/13.3 of check valve, 14.1/14.2/14.3 of manual ball valve, 15.1/15.2/15.3 of diffusion pipeline system, 16.1/16.2 of high-pressure boosting pipeline, 17.1/17.2 of check valve, 18.1/18.2 of manual valve, 19.1/19.2 of boosting device.
Description of the embodiments
Further description will be made below by way of specific examples in conjunction with the accompanying drawings.
Examples
As shown in fig. 1, when the blast furnace is in a blowing down state, raw gas in the blast furnace enters the ball joint 2 along 1.1/1.2 of the ascending pipes (generally, the ascending pipes of the blast furnace are composed of 4 ascending pipes, 2 ascending pipes are only shown in the description of the example), the raw gas in the ball joint can enter different treatment systems through three pipelines, wherein for a large and medium blast furnace, two gas diffusing/recycling pipelines 4.1/4.2 are arranged on the ball joint, one diffusing pipeline 4.3 is arranged on the descending pipe, for a small and medium blast furnace which does not adopt the ball joint, only two gas diffusing pipes are generally arranged, and one of the gas diffusing and recycling systems is selected as recycling treatment, and the conditions allow the two gas diffusing/recycling pipelines to be used as recycling treatment pipelines.
The first treatment mode is as follows: under normal state, the crude gas which is scattered during damping down enters a cyclone dust collector 9.1/9.2 through a recovery processing pipeline 4.1/4.2 for primary dust removal, large particle dust in the scattered gas is removed, then enters a recovery pipeline 10.1/10.2 and is collected into a main pipe 10.3, and then enters a bag-type dust remover 11 for secondary dust removal, and fine particle dust in the scattered gas is further removed. The gas after secondary dust removal by the bag-type dust remover 11 is connected into a clean gas pipe network of a factory through a gas pipe 10.4. In the recovery process, when the power of the gas coming out of the cyclone dust collector 9.1/9.2 is insufficient in the middle and later stages of recovery, an injection boosting device (injector) 19.1/19.2 arranged on the recovery pipeline 10.1/10.2 is started, and the gas is quickly discharged after the damping down and the gas release in the furnace is driven by the entry of a high-pressure gas source. In the process of recovering the damping down and diffusing gas, a recovery valve 7.1/7.2 and a maintenance valve 6.1/6.2 are arranged on the recovery pipeline 4.1/4.2, wherein the maintenance valve 6.1/6.2 is used for isolating high-pressure gas when the recovery valve 7.1/7.2 fails; the recovery valve 7.3 and the maintenance valve 6.3 are also arranged on the recovery gas pipeline 10.4 after the secondary dust removal by the bag-type dust remover 11, and the valve is arranged at the position close to the clean gas connecting pipe of the factory. The recovery valve 7.1/7.2/7.3 can be driven electrically or hydraulically and can be opened and closed remotely. And in the middle and later stages of recovery, a boosting valve 18.1/18.2 and a check valve 17.1/17.2 are arranged on the compressed air source boosting pipeline 16.1/16.2 and are used for controlling a high-pressure air source. Here, the boosting gas source can be high-pressure nitrogen or high-pressure coal gas, and the high-pressure gas source is selected according to specific situations in practice.
Further, in order to ensure the safe operation of the system, a nitrogen purging and gas diffusing device is arranged in the system, namely, nitrogen purging points are arranged at the positions of 4.1/4.2/10.3 and the like of the recovery pipeline, and diffusing pipes 15.1/15.2/15.3 are arranged at the positions of 10.1/10.2 of the recovery pipe, the top of the bag-type dust collector 11 and the like, and the nitrogen purging and gas diffusing device has the functions of expelling air in the recovery system before damping down and diffusing, expelling residual gas in the system after recovery, and ensuring the safety of the system. Wherein, the nitrogen purging system is provided with a manual ball valve 14.1/14.2/14.3 and a check valve 13.1/13.2/13.3 on the pipeline at the access point, and a corresponding valve device is also arranged on the bleeding pipeline.
Examples
In the above embodiment 1, when both systems cannot work normally, emergency damping down is required, the 4.3 emergency damping down pipeline on the ball joint 2 can be started, and damping down is realized by opening the gas damping down valve 5 arranged at the tail end of the emergency damping down pipeline 4.3. This example is only for use in emergency situations.
The present utility model is not limited to the above embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the scope of the present utility model are intended to be included in the scope of the present utility model. Therefore, the protection scope of the present utility model should be defined by the claims.
Claims (6)
1. A blast furnace damping down and diffusing coal gas purifying and recycling system is characterized in that: comprises a ball joint, a primary cyclone coarse dust removal system, a gas boosting system and a secondary cloth bag dust removal which are connected in sequence through a pipeline;
the primary cyclone coarse dust removal system comprises a cyclone dust remover connected with the top of a ball joint and the top of a downpipe through a gas pipeline;
the secondary bag dust removal comprises a bag dust remover connected with a gas outlet of the primary cyclone dust remover through a pipeline and a pipeline connected with a gas outlet of the bag dust remover and connected with a clean gas pipe network.
2. The blast furnace damping down and diffusing gas purifying and recycling system according to claim 1, wherein the ball joint is further provided with an accident diffusing valve.
3. The blast furnace damping down and diffusing gas purifying and recycling system according to claim 1, wherein the gas boosting system comprises an injection boosting device, a high-pressure gas source pipeline and a valve device on the pipeline.
4. The blast furnace damping down and diffusing gas purifying and recycling system according to claim 1, further comprising a nitrogen sweeping system, wherein the nitrogen sweeping system comprises a nitrogen sweeping pipeline connected to a gas inlet of the primary cyclone dust collector and a valve device.
5. The blast furnace damping down and diffusing gas purifying and recycling system according to claim 1, further comprising a diffusing system, wherein the diffusing system comprises a diffusing pipeline and valve equipment which are arranged at the top of a gas recycling pipeline and the top of a bag-type dust remover.
6. The blast furnace damping down and diffusing gas purifying and recycling system according to claim 1, wherein an emergency diffusing pipe is arranged on the ball joint, and a gas diffusing valve is arranged at the tail end of the emergency diffusing pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223510600.1U CN218910412U (en) | 2022-12-28 | 2022-12-28 | Blast furnace damping down and diffusing gas purifying and recycling system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223510600.1U CN218910412U (en) | 2022-12-28 | 2022-12-28 | Blast furnace damping down and diffusing gas purifying and recycling system |
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| Publication Number | Publication Date |
|---|---|
| CN218910412U true CN218910412U (en) | 2023-04-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223510600.1U Active CN218910412U (en) | 2022-12-28 | 2022-12-28 | Blast furnace damping down and diffusing gas purifying and recycling system |
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| Country | Link |
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| CN (1) | CN218910412U (en) |
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- 2022-12-28 CN CN202223510600.1U patent/CN218910412U/en active Active
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