CN215506155U - Dry gas purifying technology for closed electric furnace - Google Patents
Dry gas purifying technology for closed electric furnace Download PDFInfo
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- CN215506155U CN215506155U CN202121041259.2U CN202121041259U CN215506155U CN 215506155 U CN215506155 U CN 215506155U CN 202121041259 U CN202121041259 U CN 202121041259U CN 215506155 U CN215506155 U CN 215506155U
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Abstract
The utility model discloses a dry purification technology for gas of a closed electric furnace, which comprises a closed furnace, wherein the top of the closed furnace is connected with a cooling flue, the other end of the cooling flue is connected with a settling chamber, one side of the settling chamber is connected with a crude gas fan, one side of the crude gas fan is connected with three pulse bag type dust collectors, the pulse bag type dust collectors are connected with the same gas purifying fan, one end of the gas purifying fan is connected with a gas analyzer, and the other end of the gas purifying fan is connected to a user. The utility model ensures the stable balance of the furnace pressure through the arranged microcomputer automatic adjusting system, simultaneously can ensure the cooling effect and can also carry out temperature adjustment through the arranged multistage cooling flue and the bypass system, and three high-temperature pulse bag type dust collectors which are connected in parallel are provided with inlet and outlet valves and use nitrogen for blowing and cleaning dust, thereby not only enhancing the dust cleaning effect, but also having higher operation safety factor, and simultaneously, the bypass system arranged on the dust collector is used when the closed furnace is started and overhauled and the temperature exceeds the standard, and ensuring the safety of the filter bag.
Description
Technical Field
The utility model relates to the technical field of metallurgy, in particular to a dry purification technology for gas in a closed electric furnace.
Background
In recent years, in order to protect the environment and save energy, the ferroalloy production reduction electric furnace is gradually changed from an open electric furnace and a semi-closed electric furnace into a closed electric furnace, so that the amount of flue gas is greatly reduced, and simultaneously, the flue gas contains effective fuel components such as CO, H2, CH 4 and the like which account for about 80% of the volume of the gas, so that the comprehensive recycling of tail gas is realized.
While introducing the fully-closed electric furnace, the purification technology is also introduced, the wet purification process is always adopted at the initial stage, but the problems of pipeline equipment blockage, substandard purification, difficult maintenance and management and large potential safety hazard exist all the time, and with the increasing strictness of the Chinese environmental protection standard, the advanced dry method-bag type dust collector is adopted to purify the coal gas, and the emission concentration is controlled to be 30mg/Nm3In the following, it is inevitable to realize the comprehensive recycling of coal gas. Therefore, a dry purification technology for gas in a closed electric furnace is needed to solve the problems.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the defects in the prior art and provides a dry purification technology for gas in a closed electric furnace.
In order to achieve the purpose, the utility model adopts the following technical scheme:
the technology for purifying the gas of the closed electric furnace by the dry method comprises a closed furnace, wherein a cooling flue is connected to the top of the closed furnace, the other end of the cooling flue is connected with a settling chamber, one side of the settling chamber is connected with a crude gas fan, one side of the crude gas fan is connected with three pulse bag type dust collectors, the pulse bag type dust collectors are connected with the same gas purifying fan, one end of the gas purifying fan is connected with a gas analyzer, and the other end of the gas purifying fan is connected to a user.
Preferably, the cooling flue is a waste gas inlet, the other end of the waste gas inlet is fixedly connected with a first air cooler, the other end of the first air cooler is provided with a temperature sensor, the other side of the temperature sensor is fixedly connected with a first electromagnetic valve, the other side of the first electromagnetic valve is fixedly connected with an exhaust fan, the two ends of the first electromagnetic valve are provided with parallel passages, the parallel passages are fixedly connected with second electromagnetic valves, and the other sides of the second electromagnetic valves are fixedly connected with second air coolers.
Preferably, the pulse bag type dust collector is a dust collection box body, a nitrogen gas storage tank is fixedly connected to the outer wall of the dust collection box body, an electromagnetic pulse valve is arranged at the top of the nitrogen gas storage tank, an injection pipe is fixedly connected to one end of the electromagnetic pulse valve, the injection pipe extends into the dust collection box body, a pattern plate is arranged at the bottom of the injection pipe, a plurality of filter bag frames are fixedly connected to the bottom of the pattern plate, venturis are arranged between the filter bag frames and the pattern plate, dust collection filter bags are fixedly connected to the bottom of the pattern plate, and the dust collection filter bags are located on the right sides of the filter bag frames.
Preferably, the top of the dust removal box body is provided with an upper cover plate, a coal gas inlet is formed in one side of the dust removal box body, a controller is arranged on one side of the dust removal box body, a clean gas outlet is formed in the other side of the dust removal box body, an inspection door is formed in the other side of the dust removal box body, an ash discharge port is formed in the bottom of the dust removal box body, and supports are fixedly connected to two sides of the bottom of the dust removal box body.
Preferably, the closed furnace is connected with a bleeding valve, a stop valve is connected between the closed furnace and the cooling flue, a bypass valve is connected between the settling chamber and the raw gas fan, the other side of the raw gas fan is connected with a regulating valve, the three pulse bag type dust collectors are arranged in parallel, manual butterfly valves are arranged at the gas inlets, electric butterfly valves are arranged at the clean gas outlets, a bleeding electric butterfly valve is arranged at one side of the clean gas fan, and which of the loops communicated with a user is provided with the electric butterfly valve.
Preferably, a microcomputer automatic regulating system is arranged in the closed furnace, the cooling flue and the pulse bag type dust collector are both provided with bypass systems, and the pulse bag type dust collector and the pipeline are both provided with explosion-proof devices.
Preferably, the signal output ends of the closed furnace, the cooling flue and the pulse bag type dust collector are connected with a PLC (programmable logic controller) and an industrial computer.
The utility model has the beneficial effects that:
1. the furnace pressure in the closed furnace is accurately designed through the arranged microcomputer automatic adjusting system, and the fluctuation range of the air quantity and the air pressure is effectively controlled to be very close to the actual working condition parameters of the system, so that the stable balance of the furnace pressure is ensured, and the stability of the system is enhanced;
2. the multi-stage cooling flue and the bypass system can ensure the cooling effect and can also adjust the temperature, and three high-temperature pulse bag type dust collectors which are connected in parallel are provided with inlet and outlet valves and are used for blowing and cleaning dust by using nitrogen, so that the dust cleaning effect is enhanced, the operation safety coefficient is higher, and meanwhile, the bypass system arranged on the dust collector is used when the closed furnace is started and overhauled and the temperature exceeds the standard, so that the safety of a filter bag is ensured;
3. the explosion-proof device is used for designing and manufacturing a container with uniform pressure of system equipment, the access hole, the access door and the like are tightly sealed, air is not allowed to permeate, the system safety is ensured, meanwhile, the automatic coal gas sampling and analyzing device is arranged, the contents of O2, H2, CO2 and the like can be directly read from an instrument in a cabinet in an operation control room, when the content of O2 in the purification system is 2 percent higher or the content of H2 reaches 20 percent, a control cabinet loudspeaker immediately gives an alarm, corresponding protective measures are taken for protection, and the safety coefficient of the system is improved.
Drawings
FIG. 1 is a schematic system diagram of a dry purification technique for gas in a sealed electric furnace according to the present embodiment;
FIG. 2 is a schematic structural diagram of a pulse bag type dust collector of the dry purification technology for gas in a sealed electric furnace according to the embodiment;
fig. 3 is a schematic structural diagram of a multi-stage cooling mechanism of the closed electric furnace gas dry purification technology provided by the embodiment.
In the drawings: 1. sealing the furnace; 2. a bleed valve; 3. a shut-off valve; 4. cooling the flue; 5. a settling chamber; 6. a bypass valve; 7. a coarse air blower; 8. adjusting a valve; 9. a manual butterfly valve; 10. a pulse bag type dust collector; 11. an electric butterfly valve; 12. a gas purifying fan; 13. bleeding the electric butterfly valve; 14. a gas analyzer; 15. an upper cover plate; 16. an electromagnetic pulse valve; 17. a nitrogen gas storage tank; 18. a blowing pipe; 19. a venturi; 20. a filter bag frame; 21. a control instrument; 22. a gas inlet; 23. a support; 24. a purified gas outlet; 25. a pattern plate; 26. a dust removal filter bag; 27. a dust removal box body; 28. an inspection door; 29. an ash discharge port; 30. an exhaust gas inlet; 31. a first air cooler; 32. a temperature sensor; 33. a first solenoid valve; 34. a second solenoid valve; 35. a second air cooler; 36. an exhaust fan.
Detailed Description
Reference will now be made in detail to embodiments of the present patent, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present patent and are not to be construed as limiting the present patent.
In the description of this patent, it is to be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for the convenience of describing the patent and for the simplicity of description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the patent.
In the description of this patent, it is noted that unless otherwise specifically stated or limited, the terms "mounted," "connected," and "disposed" are to be construed broadly and can include, for example, fixedly connected, disposed, detachably connected, disposed, or integrally connected and disposed. The specific meaning of the above terms in this patent may be understood by those of ordinary skill in the art as appropriate.
Referring to fig. 1-3, the technology for purifying the gas in the closed electric furnace by the dry method comprises a closed furnace 1, wherein the top of the closed furnace 1 is connected with a cooling flue 4, the other end of the cooling flue 4 is connected with a settling chamber 5, one side of the settling chamber 5 is connected with a crude gas fan 7, one side of the crude gas fan 7 is connected with three pulse bag type dust collectors 10, the pulse bag type dust collectors 10 are connected with a same purified gas fan 12, one end of the purified gas fan 12 is connected with a gas analyzer 14, and the other end of the purified gas fan 12 is connected to a user.
Meanwhile, the cooling flue 4 is a waste gas inlet 30, the other end of the waste gas inlet 30 is fixedly connected with a first air cooler 31, the other end of the first air cooler 31 is provided with a temperature sensor 32, the other side of the temperature sensor 32 is fixedly connected with a first electromagnetic valve 33, the other side of the first electromagnetic valve 33 is fixedly connected with an exhaust fan 36, two ends of the first electromagnetic valve 33 are provided with parallel passages, the parallel passages are fixedly connected with a second electromagnetic valve 34, the other side of the second electromagnetic valve 34 is fixedly connected with a second air cooler 35, the pulse bag type dust collector 10 is a dust collecting box body 27, the outer wall of the dust collecting box body 27 is fixedly connected with a nitrogen gas storage tank 17, the top of the nitrogen gas storage tank 17 is provided with an electromagnetic pulse valve 16, one end of the electromagnetic pulse valve 16 is fixedly connected with an injection pipe 18, the injection pipe 18 extends into the dust collecting box body 27, the bottom of the injection pipe 18 is provided with a pattern plate 25, and the bottom of the pattern plate 25 is fixedly connected with a plurality of filter bag frames 20, a venturi tube 19 is arranged between a filter bag frame 20 and a pattern plate 25, a dust removing filter bag 26 is fixedly connected with the bottom of the pattern plate 25, the dust removing filter bag 26 is positioned at the right side of the filter bag frame 20, an upper cover plate 15 is arranged at the top of a dust removing box body 27, a coal gas inlet 22 is arranged at one side of the dust removing box body 27, a controller 21 is arranged at one side of the dust removing box body 27, a clean gas outlet 24 is arranged at the other side of the dust removing box body 27, an inspection door 28 is arranged at the other side of the dust removing box body 27, an ash discharge port 29 is arranged at the bottom of the dust removing box body 27, a support 23 is fixedly connected with two sides of the bottom of the dust removing box body 27, a bleeding valve 2 is connected with a closed furnace 1, a stop valve 3 is connected between the closed furnace 1 and a cooling flue 4, a bypass valve 6 is connected between a settling chamber 5 and a coarse gas fan 7, an adjusting valve 8 is connected with the other side of the coarse gas fan 7, three pulse bag type dust collectors 10 are arranged in parallel, and manual butterfly valves 9 are arranged at the coal gas inlet 22, the electric butterfly valve 11 is arranged at the position of the clean gas outlet 24, the diffusing electric butterfly valve 13 is arranged on one side of the clean gas fan 12, the electric butterfly valve 11 is arranged in a loop communicated with a user, the microcomputer automatic adjusting system is arranged inside the closed furnace 1, the cooling flue 4 and the pulse bag type dust collector 10 are both provided with bypass systems, the pulse bag type dust collector 10 and pipelines are both provided with explosion-proof devices, and the signal output ends of the closed furnace 1, the cooling flue 4 and the pulse bag type dust collector 10 are all connected with a PLC (programmable logic controller) and an industrial computer.
The working principle is as follows: when the device is used, flue gas generated by the operation of the closed furnace 1 enters the cooling flue 4 through the stop valve 3, enters the first air cooler 31 through the waste gas inlet 30, the temperature sensor 32 detects the temperature of the flue gas after the first cooling, if the temperature is reduced to the required temperature, the PLC controller controls the first electromagnetic valve 33 to be opened, the flue gas is sent into the settling chamber 5 through the exhaust fan 36, if the temperature is not reduced to the required temperature, the PLC controller controls the second electromagnetic valve 34 to be opened, the flue gas enters the second air cooler 35 for secondary cooling, after the cooling is finished, the PLC controller controls the first electromagnetic valve 33 to be opened, the flue gas is sent into the settling chamber 5 through the exhaust fan 36, the settled gas enters the pulse bag type dust remover 10 connected in parallel through the coarse gas fan 7, nitrogen in the nitrogen gas storage tank 17 is compressed through the electromagnetic pulse valve 16 and then is injected through the injection pipe 18, the gas in the dust removal filter bag 26 is dedusted, and dust falls into the dust discharge port 29, the purified gas is discharged from the purified gas outlet 24 to the purified gas blower 12, and the purified gas is sent to the user by the purified gas blower 12.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and equivalent alternatives or modifications according to the technical solution of the present invention and the inventive concept thereof should be covered by the scope of the present invention.
Claims (7)
1. The technology for purifying the gas of the airtight electric furnace by the dry method comprises an airtight furnace (1) and is characterized in that a cooling flue (4) is connected to the top of the airtight furnace (1), the other end of the cooling flue (4) is connected with a settling chamber (5), one side of the settling chamber (5) is connected with a crude gas fan (7), one side of the crude gas fan (7) is connected with three pulse bag type dust collectors (10), the pulse bag type dust collectors (10) are connected with the same clean gas fan (12), one end of the clean gas fan (12) is connected with a gas analyzer (14), and the other end of the clean gas fan (12) is connected to a user.
2. The closed electric furnace gas dry purification technology as claimed in claim 1, wherein the cooling flue (4) is a waste gas inlet (30), the other end of the waste gas inlet (30) is fixedly connected with a first air cooler (31), the other end of the first air cooler (31) is provided with a temperature sensor (32), the other end of the temperature sensor (32) is fixedly connected with a first electromagnetic valve (33), the other end of the first electromagnetic valve (33) is fixedly connected with an exhaust fan (36), two ends of the first electromagnetic valve (33) are provided with parallel passages, the parallel passages are fixedly connected with a second electromagnetic valve (34), and the other end of the second electromagnetic valve (34) is fixedly connected with a second air cooler (35).
3. The dry purification technology for the gas in the enclosed electric furnace according to claim 1, wherein the pulse bag type dust collector (10) is a dust collection box body (27), a nitrogen gas storage tank (17) is fixedly connected to the outer wall of the dust collection box body (27), an electromagnetic pulse valve (16) is arranged at the top of the nitrogen gas storage tank (17), an injection pipe (18) is fixedly connected to one end of the electromagnetic pulse valve (16), the injection pipe (18) extends into the dust collection box body (27), a pattern plate (25) is arranged at the bottom of the injection pipe (18), a plurality of filter bag frames (20) are fixedly connected to the bottom of the pattern plate (25), a venturi tube (19) is arranged between each filter bag frame (20) and each pattern plate (25), a dust collection filter bag (26) is fixedly connected to the bottom of each pattern plate (25), and the dust collection filter bag (26) is located on the right side of each filter bag frame (20).
4. The dry purification technology for the gas in the closed electric furnace according to claim 3, wherein an upper cover plate (15) is arranged at the top of the dust removal box body (27), a gas inlet (22) is formed in one side of the dust removal box body (27), a controller (21) is arranged at one side of the dust removal box body (27), a purified gas outlet (24) is formed in the other side of the dust removal box body (27), an inspection door (28) is formed in the other side of the dust removal box body (27), an ash discharge port (29) is formed in the bottom of the dust removal box body (27), and supports (23) are fixedly connected to two sides of the bottom of the dust removal box body (27).
5. The dry purification technology for gas in a closed electric furnace according to claim 1, characterized in that a bleeding valve (2) is connected to the closed furnace (1), a cut-off valve (3) is connected between the closed furnace (1) and a cooling flue (4), a bypass valve (6) is connected between a settling chamber (5) and a raw gas fan (7), an adjusting valve (8) is connected to the other side of the raw gas fan (7), three pulse bag type dust collectors (10) are arranged in parallel, manual butterfly valves (9) are arranged at gas inlets (22), electric butterfly valves (11) are arranged at clean gas outlets (24), a bleeding electric butterfly valve (13) is arranged at one side of a clean gas fan (12), and an electric butterfly valve (11) is arranged in a loop communicated with a user.
6. The dry purification technology of the closed electric furnace gas according to claim 1, characterized in that a microcomputer automatic regulating system is arranged in the closed furnace (1), the cooling flue (4) and the pulse bag type dust collector (10) are both provided with a bypass system, and the pulse bag type dust collector (10) and the pipeline are both designed with an explosion-proof device.
7. The closed electric furnace gas dry purification technology as claimed in claim 1, wherein signal output ends of the closed furnace (1), the cooling flue (4) and the pulse bag type dust collector (10) are connected with a PLC controller and an industrial computer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121041259.2U CN215506155U (en) | 2021-05-17 | 2021-05-17 | Dry gas purifying technology for closed electric furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121041259.2U CN215506155U (en) | 2021-05-17 | 2021-05-17 | Dry gas purifying technology for closed electric furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215506155U true CN215506155U (en) | 2022-01-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121041259.2U Expired - Fee Related CN215506155U (en) | 2021-05-17 | 2021-05-17 | Dry gas purifying technology for closed electric furnace |
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| CN (1) | CN215506155U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116497167A (en) * | 2023-06-20 | 2023-07-28 | 华北理工大学智能仪器厂 | Blast furnace gas cloth bag dust removing system |
-
2021
- 2021-05-17 CN CN202121041259.2U patent/CN215506155U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116497167A (en) * | 2023-06-20 | 2023-07-28 | 华北理工大学智能仪器厂 | Blast furnace gas cloth bag dust removing system |
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| GR01 | Patent grant | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20220114 |
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| CF01 | Termination of patent right due to non-payment of annual fee |