CN215404318U - Non-diffusion recovery system for blast furnace top pressure-equalizing gas - Google Patents
Non-diffusion recovery system for blast furnace top pressure-equalizing gas Download PDFInfo
- Publication number
- CN215404318U CN215404318U CN202121475094.XU CN202121475094U CN215404318U CN 215404318 U CN215404318 U CN 215404318U CN 202121475094 U CN202121475094 U CN 202121475094U CN 215404318 U CN215404318 U CN 215404318U
- Authority
- CN
- China
- Prior art keywords
- gas
- pressure
- charging bucket
- blast furnace
- pipeline
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Blast Furnaces (AREA)
Abstract
The utility model relates to the field of smelting equipment, in particular to a non-diffusion recovery system for blast furnace top pressure-equalizing coal gas. The system comprises a blast furnace, a furnace top charging bucket, a cyclone dust collector, a nitrogen storage tank, a bag-type dust collector, a coal gas recovery fan and a recovery coal gas storage tank; the device comprises a charging bucket, a cyclone dust collector, a lower sealing valve, an upper sealing valve, a pressure equalizing pipeline and a pressure discharging pipeline, wherein the lower part of the charging bucket is connected with a blast furnace through the lower sealing valve, the upper part of the charging bucket is connected with a feeding hole for feeding the blast furnace through the upper sealing valve, the side surface of the charging bucket is connected with a nitrogen storage tank through a nitrogen pipeline, and one side of the top of the charging bucket is provided with the pressure equalizing pipeline and the pressure discharging pipeline which are connected with the feeding hole at the bottom of the cyclone dust collector; the top of the cyclone dust collector is connected with a bag-type dust collector through a pressure-equalizing gas pipeline, and the gas outlet end of the bag-type dust collector is connected with the inlet of the gas storage tank; the gas storage tank is used for storing the recycled pressure-equalizing gas. The utility model adds a dry cloth bag dust removing system by means of the original blast furnace gas dust removing and purifying system and the gas pipeline system, and the recovered gas is merged into the original clean gas pipeline system.
Description
Technical Field
The utility model relates to the field of smelting equipment, in particular to a non-diffusion recovery system for blast furnace top pressure-equalizing coal gas.
Background
The blast furnace smelting process adopts a high-pressure furnace top, and the furnace top charging bucket must perform pressure equalizing operation. The pressure equalizing and discharging system is a subsystem of the high-pressure operation system of the blast furnace. Generally, after a charging bucket on the top of a furnace charges into the furnace and before the next charging, pressure-equalizing coal gas in the charging bucket is directly discharged into the atmosphere through a cyclone dust collector and a silencer. The charging of the blast furnace is continuously circulated, generally 6 to 7 batches per hour, more 8 to 9 batches per hour, each batch is about 7 to 10 minutes, and the gas diffusion pressure is about 0.15 to 0.25 MPa.
The noise is generated when the pressure-equalizing coal gas of the furnace top charging bucket is diffused, a large amount of coal gas and dust are discharged into the atmosphere, and the diffused coal gas contains a large amount of CO, CO2 and N2、CH4、H2And dust and other toxic and harmful gases and particles, and the main hazards of directly diffusing into the atmosphere are: the CO content in the coal gas is high, the toxicity is high, and the atmospheric quality is seriously deteriorated; the noise is high in the discharging process, and people are disturbed day and night; the dust content in the coal gas is high, and the coal gas pollutes the atmospheric environment for a long time, which is one of the factors causing haze. The recovery of blast furnace pressure-equalizing gas is a valuable and meaningful technology, and the furnace top pressure-equalizing gas not only causes huge pollution to the environment, but also causes a great deal of gas resource waste, and is a huge economic loss.
SUMMERY OF THE UTILITY MODEL
In order to overcome the technical problems in the prior art, the utility model discloses a blast furnace top pressure-equalizing gas non-emission system.
The specific technical scheme provided by the utility model is as follows:
a blast furnace top pressure-equalizing gas non-diffusion recovery system comprises a blast furnace, a furnace top charging bucket, a cyclone dust collector, a nitrogen storage tank, a bag-type dust collector, a gas recovery fan and a recovery gas storage tank; the device comprises a charging bucket, a cyclone dust collector, a lower sealing valve, an upper sealing valve, a pressure equalizing pipeline and a pressure discharging pipeline, wherein the lower part of the charging bucket is connected with a blast furnace through the lower sealing valve, the upper part of the charging bucket is connected with a feeding hole for feeding the blast furnace through the upper sealing valve, the side surface of the charging bucket is connected with a nitrogen storage tank through a nitrogen pipeline, and one side of the top of the charging bucket is provided with the pressure equalizing pipeline and the pressure discharging pipeline which are connected with the feeding hole at the bottom of the cyclone dust collector; the top of the cyclone dust collector is connected with a bag-type dust collector through a pressure-equalizing gas pipeline, and the gas outlet end of the bag-type dust collector is connected with the inlet of the gas storage tank; the gas storage tank is used for storing the recycled pressure-equalizing gas.
Further, the charging bucket is a high-pressure charging bucket, and an upper pressure equalizing valve is arranged on a communicating pipe at the upper part of the charging bucket and is responsible for communicating and equalizing pressure with the gas recovery system; and a lower pressure equalizing valve is arranged on the communicating pipe at the lower part of the charging bucket and is responsible for communicating and equalizing pressure with the lower blast furnace.
Furthermore, the nitrogen storage tank is connected with a nitrogen pipe network of a plant area, and a first cut-off valve is arranged on an air inlet pipeline and an air outlet pipeline which are connected with the nitrogen storage tank through the nitrogen pipe network.
Furthermore, a second cut-off valve is arranged on a pipeline connecting the coal gas storage tank and the bag-type dust collector.
Further, the bag-type dust remover is connected with the gas storage tank through a gas pipeline, a gas recovery fan is arranged on the gas pipeline, and the recovery fan is used for leading out purified gas from the bag-type dust remover and sending the purified gas into the gas storage tank.
Furthermore, the system also comprises an automatic control system linked with each valve, and the automatic control system is interlocked with the charging operation of the charging bucket.
The utility model has the following beneficial effects:
the pressure-equalizing gas non-diffusion recovery system recovers the pressure-equalizing gas at the top of the blast furnace, and the gas needs to be dedusted and purified and then sent to a clean gas pipe network. The pressure-equalizing gas recovery is realized by means of the original blast furnace gas dust removal and purification system and a gas pipeline system, a dry cloth bag dust removal system is newly added, and the recovered gas is merged into the original clean gas pipeline system. When the dust removal system is independently arranged, the automatic control system linked with each valve is independently arranged and interlocked with the charging operation of the blast furnace charging bucket. The pressure-equalizing coal gas enters a special bag-type dust collector through a cyclone dust collector and a recovery pipeline, dust in the coal gas is basically filtered and settled, and then the coal gas is sent to a clean coal gas main pipe network.
Drawings
FIG. 1 is a schematic of the present invention.
In the figure: 1. a blast furnace; 2. a furnace top charging bucket; 3. a nitrogen storage tank; 4. a cyclone dust collector; 5. a bag-type dust collector; 6. a gas storage tank; 7. a hot blast stove; 8. a first cut-off valve; 9. a second cut-off valve; 10. an upper pressure equalizing valve; 11. a lower pressure equalizing valve; 12. a third cut-off valve; 13. an air outlet valve; 14. an upper sealing valve; 15. a lower seal valve; 16. a coal gas recovery induced draft fan.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, in the system for non-emission recovery of blast furnace top pressure-equalizing gas provided by the embodiment of the present invention, a nitrogen storage tank 3, a bag-type dust collector 5, a gas recovery fan and a recovery gas storage tank 6 are added on the basis of an original blast furnace 1, a furnace top charging bucket 2 and a cyclone dust collector 4; in order to hermetically recover all the high-pressure coal gas in the charging bucket 2, other parts except the blast furnace 1 in the structure belong to a coal gas recovery system independently established in the utility model. The direct lower part of the furnace top charging bucket 2 is connected with the blast furnace 1 through a lower sealing valve 15, and the direct upper part of the furnace top charging bucket 2 is connected with a feeding hole for feeding the blast furnace 1 through an upper sealing valve 14; the side surface of the charging bucket 2 is connected with a nitrogen storage tank 3 through a nitrogen pipeline, and one side of the top of the charging bucket 2 is provided with a pressure equalizing pipeline and a pressure discharging pipeline which are connected with a feeding hole at the bottom of the cyclone dust collector 4; the top of the cyclone dust collector 4 is connected with a bag-type dust collector 5 through a pressure-equalizing gas pipeline, and the gas outlet end of the bag-type dust collector 5 is connected with the inlet of a gas storage tank 6. The gas storage tank 6 is used for storing the recycled pressure-equalizing gas and directly supplying the pressure-equalizing gas to the hot blast stove 7 for burning or other purposes.
Preferably, the charging bucket 2 at the top of the blast furnace 1 is a high-pressure charging bucket, the upper part and the lower part of the charging bucket are respectively provided with a sealing valve, an upper pressure equalizing valve 10 is arranged on a communicating pipe at the upper part of the charging bucket 2 and is responsible for communicating with a gas recovery system for equalizing pressure, and a lower pressure equalizing valve 11 is arranged on a communicating pipe at the lower part of the charging bucket 2 and is responsible for communicating with the lower part of the blast furnace 1 for equalizing pressure. The charging and discharging of the furnace top charging bucket 2 are carried out under the condition of no pressure difference, the charging of the charging bucket 2 is carried out by enabling the furnace top charging bucket 2 to be the same as the atmospheric pressure, and the discharging of the charging bucket 2 is carried out in the blast furnace 1 by enabling the pressure of the furnace top charging bucket 2 to be the same as the pressure of the blast furnace 1.
Preferably, the nitrogen storage tank 3 is connected with a nitrogen pipe network of a plant area, and a first cut-off valve 8 is arranged on an air inlet pipeline and an air outlet pipeline which are connected with the nitrogen storage tank 3.
Preferably, the bag-type dust collector 5 is independently arranged for pressure-equalizing gas recovery, is provided with an independent control system and is interlocked with the charging operation of the blast furnace charging bucket.
Preferably, the gas storage tank 6 is independently arranged for pressure-equalizing gas recovery and is used for storing recovered gas, and a second cut-off valve 9 is arranged on a pipeline connecting the gas storage tank 6 and the bag-type dust collector 5.
Preferably, the bag-type dust collector 5 is connected with the gas storage tank 6 through a gas pipeline, and a gas recovery fan 16 is arranged on the connecting pipeline and used for leading purified gas out of the bag-type dust collector and simultaneously feeding the purified gas into the gas storage tank 6.
The working principle is as follows:
the utility model fully utilizes the differential pressure driving force of the coal gas to realize 100 percent recovery of the furnace top pressure-sharing coal gas by the pressure control, pressure stabilization and pressure compensation operations of the pressure-sharing coal gas. The top pressure-equalizing gas non-diffusion recovery is to recover high-pressure gas in a top charging bucket 2 twice, wherein the first time is that the gas pressure in the charging bucket 2 is larger than or close to the pressure of a gas storage tank 6 for recovery, and the second time is that the gas pressure in the charging bucket 2 is close to, equal to or smaller than the pressure of the gas storage tank 6 for recovery. The recycled pressure-equalizing coal gas is blast furnace coal gas charged after the charging bucket 2 discharges, and the pressure of the recycled pressure-equalizing coal gas is the same as the pressure in the blast furnace 1. Before charging into the charging bucket 2, high-pressure coal gas in the charging bucket 2 needs to be discharged, so that the pressure of the high-pressure coal gas is the same as atmospheric pressure, and then charging is carried out without pressure difference. One operation cycle of charging and discharging the furnace top charging bucket 2 is as follows:
(1) charging bucket 2 pressure equalizing → charging: before charging, the communication between the charging bucket 2 and the blast furnace 1 needs to be cut off, the gas in the charging bucket 2 is discharged, the pressure difference between the gas pressure in the furnace top charging bucket 2 and the gas storage tank 6 for recovery is taken as a driving force, the gas in the charging bucket 2 flows out at a high speed, firstly enters the cyclone dust collector 4 for coarse dust removal, then enters the bag-type dust collector 5 along a gas pipeline, and the purified gas enters the gas storage tank 6 for recovery under the driving of the pressure difference; when the pressure in the charging bucket 2 is close to the atmospheric pressure, closing the upper pressure equalizing valve, opening the upper sealing valve, and allowing the furnace burden to fall into the charging bucket 2; after the charging is completed, the upper sealing valve is closed to prepare for discharging into the blast furnace 1.
(2) Pressure equalizing → discharging of the charging bucket 2; when discharging into the blast furnace 1, opening a lower equalizing valve on a communicating pipe between the charging bucket 2 and the blast furnace 1 to ensure that the pressure in the charging bucket 2 is consistent with the pressure in the blast furnace 1, and closing the lower equalizing valve; then, opening a lower sealing valve, and enabling the furnace burden in the charging bucket 2 to fall onto a chute in the blast furnace 1 and distributing through the chute; and after the material tank 2 finishes discharging, closing the lower sealing valve and waiting for charging the material tank 2.
The first recovery of the pressure-equalizing gas is empty in the charging bucket 2 at the top of the furnace, the pressure in the charging bucket 2 is the same as the pressure in the blast furnace 1, and the charging bucket 2 needs to be charged. Before charging, the communication between the charging bucket 2 and the blast furnace 1 needs to be cut off, the gas in the charging bucket 2 is discharged, the pressure difference between the gas pressure in the furnace top charging bucket 2 and the gas storage tank 6 for recycling is used as a driving force, the gas in the charging bucket 2 flows out at a high speed, firstly enters the cyclone dust collector 4 for coarse dust removal, then enters the bag-type dust collector 5 along a gas pipeline, and the purified gas enters the gas storage tank 6 for recycling under the driving of the pressure difference. After the first time of recovering the gas, the pressure of the gas in the charging bucket 2 is higher than that of the gas storage tank 6 for recovering.
And (3) recovering the pressure-equalizing coal gas for the second time, namely starting a coal gas recovery induced draft fan when the outlet pressure of the bag-type dust collector 5 is close to the pressure of the recovery coal gas storage tank 6, and leading out the pressure-equalizing coal gas pipeline and the coal gas in the charging bucket 2. Meanwhile, when the gas pressure in the charging bucket 2 is close to the atmospheric pressure, the gas outlet valve 13 of the nitrogen storage tank 3 is opened, nitrogen is filled into the charging bucket 2, and the micro-positive pressure in the charging bucket 2 is maintained. When the CO content in the inlet gas of the cyclone dust collector 4 begins to decrease and the N2 content increases, the third recovery pipeline cut-off valve 12 connected with the charging bucket 2 is closed, then the gas outlet valve 13 of the nitrogen storage tank 3 is closed, and the secondary gas recovery is finished.
It will be apparent to those skilled in the art that various modifications and variations can be made in the embodiments of the present invention without departing from the spirit or scope of the embodiments of the utility model. Thus, if such modifications and variations of the embodiments of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to encompass such modifications and variations.
Claims (6)
1. The utility model provides a blast furnace top voltage-sharing coal gas does not have recovery system that diffuses, includes blast furnace, furnace roof charging bucket and cyclone, its characterized in that: the device also comprises a nitrogen storage tank, a bag-type dust collector, a coal gas recovery fan and a coal gas storage tank for recovery; the device comprises a charging bucket, a cyclone dust collector, a lower sealing valve, an upper sealing valve, a pressure equalizing pipeline and a pressure discharging pipeline, wherein the lower part of the charging bucket is connected with a blast furnace through the lower sealing valve, the upper part of the charging bucket is connected with a feeding hole for feeding the blast furnace through the upper sealing valve, the side surface of the charging bucket is connected with a nitrogen storage tank through a nitrogen pipeline, and one side of the top of the charging bucket is provided with the pressure equalizing pipeline and the pressure discharging pipeline which are connected with the feeding hole at the bottom of the cyclone dust collector; the top of the cyclone dust collector is connected with a bag-type dust collector through a pressure-equalizing gas pipeline, and the gas outlet end of the bag-type dust collector is connected with the inlet of the gas storage tank; the gas storage tank is used for storing the recycled pressure-equalizing gas.
2. The blast furnace top pressure equalizing gas non-diffusion recovery system according to claim 1, wherein: the charging bucket is a high-pressure charging bucket, and an upper pressure equalizing valve is arranged on a communicating pipe at the upper part of the charging bucket and is responsible for communicating and equalizing with a gas recovery system; and a lower pressure equalizing valve is arranged on the communicating pipe at the lower part of the charging bucket and is responsible for communicating and equalizing pressure with the lower blast furnace.
3. The blast furnace top pressure equalizing gas non-diffusion recovery system according to claim 1, wherein: the nitrogen storage tank is connected with a nitrogen pipe network of a plant area, and a first cut-off valve is arranged on an air inlet pipeline and an air outlet pipeline which are connected with the nitrogen storage tank through the nitrogen pipe network.
4. The blast furnace top pressure equalizing gas non-diffusion recovery system according to claim 1, wherein: and a second cut-off valve is arranged on a pipeline connecting the coal gas storage tank and the bag-type dust remover.
5. The blast furnace top pressure equalizing gas non-diffusion recovery system according to claim 1, wherein: the bag-type dust remover is connected with the gas storage tank through a gas pipeline, a gas recovery fan is arranged on the gas pipeline, and the recovery fan is used for leading out purified gas from the bag-type dust remover and sending the purified gas into the gas storage tank.
6. The blast furnace top pressure equalizing gas non-diffusion recovery system according to claim 1, wherein: the automatic control system is linked with the valves and is interlocked with the charging operation of the charging bucket.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121475094.XU CN215404318U (en) | 2021-06-30 | 2021-06-30 | Non-diffusion recovery system for blast furnace top pressure-equalizing gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121475094.XU CN215404318U (en) | 2021-06-30 | 2021-06-30 | Non-diffusion recovery system for blast furnace top pressure-equalizing gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215404318U true CN215404318U (en) | 2022-01-04 |
Family
ID=79643499
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121475094.XU Active CN215404318U (en) | 2021-06-30 | 2021-06-30 | Non-diffusion recovery system for blast furnace top pressure-equalizing gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215404318U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115323091A (en) * | 2022-04-18 | 2022-11-11 | 中钢集团西安重机有限公司 | Charging method based on bell-less furnace top charging equipment |
-
2021
- 2021-06-30 CN CN202121475094.XU patent/CN215404318U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115323091A (en) * | 2022-04-18 | 2022-11-11 | 中钢集团西安重机有限公司 | Charging method based on bell-less furnace top charging equipment |
| CN115323091B (en) * | 2022-04-18 | 2024-04-26 | 中钢集团西安重机有限公司 | Charging method based on bell-less furnace top charging equipment |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101892336A (en) | Coal-gas recovering process and device of charging, equalizing and bleeding of blast furnace | |
| CN102337364A (en) | Device for recovering coal gas in equalizing and relieving process of furnace top of blast furnace | |
| CN102864257A (en) | Pressure-equalizing and bleeding method for injecting furnace roof tank coal gas by using high-pressure gas | |
| CN207002767U (en) | Furnace top material tank for blast furnace pressure-equalizing and discharging gas recovery system | |
| CN205062095U (en) | Blast furnace furnace roof material jar diffuses gas purifying, recovery system | |
| CN104073581A (en) | Process method and device for forcibly recovering diffused gas of blast furnace | |
| CN215404318U (en) | Non-diffusion recovery system for blast furnace top pressure-equalizing gas | |
| CN111187867A (en) | Integrated recovery process for diffused raw coke oven gas | |
| CN211255968U (en) | Pressure-equalizing gas self-cleaning purifying and full-recovering device for blast furnace top charging bucket | |
| CN211689134U (en) | Novel blast furnace top pressure-equalizing gas and blast furnace damping-down waste gas integrated treatment system | |
| CN102337365A (en) | Process for recovering coal gas in equalizing and relieving process of furnace top of blast furnace | |
| CN110004258A (en) | A kind of device recycling blast furnace top pressure-equalizing bleeding coal gas | |
| CN209227010U (en) | A kind of novel blast-furnace presses coal gas processing device | |
| CN107201417A (en) | A kind of full retracting device of blast furnace roof feed pot pressure-equalizing and discharging coal gas and recovery method | |
| CN105177206B (en) | A kind of blast furnace bucket pressure-equalizing bleeding device and method | |
| CN201737956U (en) | Recycling device for gas in blast-furnace charging and uniform-pressure diffusing process | |
| CN102864260A (en) | Pressure-equalizing bleeding device for ejecting furnace-top tank gas by high pressure gas | |
| CN103060500B (en) | Blast furnace top pressure equalizing and releasing process and device with pressure equalized goal gas recycling function | |
| CN203174122U (en) | Blast furnace roof pressure equalizing diffusion device with equalizing gas recovery function | |
| CN104263866A (en) | System and process for purifying and utilizing equalized diffuse gas of blast furnace top charging bucket | |
| CN206109441U (en) | Clean system is diffused in voltage -sharing | |
| CN205473859U (en) | High furnace charge jar diffuses gas recovery system | |
| CN202208727U (en) | Gas recovering device used during uniform pressure diffusing of blast furnace top | |
| CN115652001A (en) | Blast furnace top pressure-equalizing gas recovery system and recovery method thereof | |
| CN211814525U (en) | Treatment device for diffused gas at top of blast furnace |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |