CN111004650A - Dust removal device and dust removal method for gas containing dust and tar - Google Patents
Dust removal device and dust removal method for gas containing dust and tar Download PDFInfo
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- CN111004650A CN111004650A CN201911180838.2A CN201911180838A CN111004650A CN 111004650 A CN111004650 A CN 111004650A CN 201911180838 A CN201911180838 A CN 201911180838A CN 111004650 A CN111004650 A CN 111004650A
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
- C10K1/00—Purifying combustible gases containing carbon monoxide
- C10K1/02—Dust removal
- C10K1/024—Dust removal by filtration
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/0084—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours provided with safety means
- B01D46/0086—Filter condition indicators
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/56—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition
- B01D46/58—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition connected in parallel
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/66—Regeneration of the filtering material or filter elements inside the filter
- B01D46/70—Regeneration of the filtering material or filter elements inside the filter by acting counter-currently on the filtering surface, e.g. by flushing on the non-cake side of the filter
- B01D46/72—Regeneration of the filtering material or filter elements inside the filter by acting counter-currently on the filtering surface, e.g. by flushing on the non-cake side of the filter with backwash arms, shoes or nozzles
Abstract
A dust collector containing dust and tar gas and a dust collection method thereof relate to a dust collector, which at least comprises two dust collection units, each dust collection unit comprises a shell, an air inlet branch pipe, a storage dust bin and a filter device, one side in the shell is provided with the storage dust bin, the upper part of the storage dust bin is provided with an air inlet cavity, the middle part of the outer side of the storage dust bin is provided with the filter device, the filter device comprises a material leveling rod control rod, a material leveling rod, a material discharging rod, a filter bed and a material baffle plate, the middle part of the outer side of the storage dust bin is provided with the filter bed, the filter material is paved on the filter screen of the filter bed, the lower part of the filter bed is provided with a gas purification chamber, the material discharging rod assembly with a connecting rod structure is arranged in the gas purification chamber, and the material baffle plate connected with the; the invention effectively solves the problem that the filter material is bonded by tar to lose the filtering effect, and does not influence the normal production of the device and the process.
Description
Technical Field
The invention relates to a dust removal device, in particular to a dust removal device and a dust removal method for gas containing dust and tar.
Background
The known dust removal method applied to the dust-containing and tar-containing gas mainly comprises electric dust removal and filtration dust removal, wherein the electric dust removal is used for removing the dust of the tar-containing gas, has the uncertainty of poor corona stability, electrode corrosion, sensitivity to the specific resistance of dust and gas component properties, and is not stably used in the field of dust removal of high-temperature tar-containing gas. The filtering and dust removing have high dust removing efficiency, for example, a particle bed dust remover, a ceramic filter tube dust remover, a metal film filter tube dust remover and the like are also widely applied to the field of dust removal of high-temperature tar-containing gas, but the current filtering and dust removing device is greatly influenced by the temperature change of the tar-containing gas, once the temperature of the gas fluctuates, tar can be separated out, the separated tar can be bonded with particles or block a filter tube, the filter can be blocked in a large area, and even a process system can not continue to operate.
Chinese patent document CN106139799A discloses a granular bed dust remover, which comprises a built-in multilayer granular bed filter, each layer of granular bed filter comprises at least one filter unit, each filter unit is a dust-containing gas inlet, a filter material and a gas purifying chamber from top to bottom, the dust-containing gas is filtered by the filter unit and then discharged from a gas outlet of the gas purifying chamber, after a certain amount of dust is filtered by each filter unit, a blowback gas is introduced from the gas purifying chamber to perform blowback regeneration on the filter unit needing blowback, and online operation can be realized. Has the advantages of high filtering precision and on-line back flushing regeneration. However, the dust remover is used for removing dust of coal gas containing tar, the coal gas containing the tar can be cooled when passing through the dust remover, so that the tar is separated out, the separated tar can be bonded with particles, the operation effect of a particle bed is greatly reduced, and even the production is stopped; therefore, the dust removal device for the gas containing dust and tar, which can realize the back-blowing regeneration of the filter material and can also perform on-line filter material replacement when the filter material is bonded, is provided, and becomes the basic appeal of the technical personnel in the field.
Disclosure of Invention
In order to overcome the defects in the background art, the invention discloses a dust removal device and a dust removal method for gas containing dust and tar.
In order to realize the purpose, the invention adopts the following technical scheme:
a dust removing device for coal gas containing dust and tar comprises at least two dust removing units, each dust removing unit comprises a shell, an air inlet branch pipe, a storage dust bin and a filtering device, one side in the shell is provided with the storage dust bin, the upper part of the storage dust bin is provided with an air inlet cavity, the upper part of the air inlet cavity is provided with an air inlet and communicated with the air inlet branch pipe, the middle part of the outer side of the storage dust bin is provided with the filtering device, the filtering device comprises a material leveling rod control rod, a material leveling rod, a discharging rod, a filtering bed and a material baffle plate, the middle part of the outer side of the storage dust bin is provided with the filtering bed, a filtering material is paved on the filtering net of the filtering bed, the lower part of the filtering bed is provided with a gas purifying chamber, a material discharging rod assembly of a connecting rod structure is arranged in the gas purifying chamber, the inner side of the filtering bed is provided with the material baffle plate connected with the material discharging rod assembly, the upper part of the inner side, and the material leveling rod is arranged on the filter material, the outer sides of the air purifying chambers are respectively provided with an air outlet pipe, the air outlet pipes are provided with a back-blowing gas pipe, and the bottoms of the material storage dust bins are respectively provided with a material discharging dust opening.
The dust removing device for the dust-containing and tar-containing gas is characterized in that an air inlet main pipe is arranged on the upper portion of a shell of each dust removing unit, an air inlet branch pipe arranged on the upper portion of an air inlet cavity of each dust removing unit is communicated with the air inlet main pipe, a guide plate is arranged at the position of an air inlet in the air inlet cavity of each dust removing unit, and the guide plates are all obliquely arranged towards a filter bed.
The filter bed of the dust removing unit of the dust removing device for the coal gas containing dust and tar adopts a metal or ceramic filter screen.
The dust removing device for the gas containing dust and tar is characterized in that the upper part of the shell of the dust removing unit is provided with a feed pipe, and the feed pipes are respectively arranged corresponding to the upper part and the lower part of a filter bed in the dust removing unit.
The dust collecting device of the gas containing dust and tar is characterized in that a dust storage bin and a dust inlet cavity of the dust collecting unit are arranged up and down correspondingly.
The dust removing device for the gas containing dust and tar is characterized in that control valves are arranged on the gas inlet branch pipes, and valves are arranged in the gas outlet pipe and the back blowing pipe.
The dust removal device for the dust-containing and tar-containing gas is characterized in that the upper end of the material leveling rod control rod and the outer end of the discharge rod are arranged outside the shell, and high-temperature-resistant sealing elements are arranged at the penetrating positions of the material leveling rod control rod, the discharge rod and the shell.
The dust removing device for the gas containing dust and tar is characterized in that the inner end of a horizontal discharging rod of the discharging rod assembly is fixedly connected with the lower part of the material baffle plate, and a hinged rod of the discharging rod assembly is hinged with an ear plate at the bottom of the filter bed.
The upper end part of the control rod of the material leveling rod of the dust removing device containing dust and tar gas is connected with a driving motor.
A dust removal method of gas containing dust and tar specifically comprises the following steps:
(1) introducing clean coal gas at 300-550 ℃ through a blowback pipe to preheat the filter material and the filter bed to 300-550 ℃, and preparing the next step of coal gas purification process;
(2) the dust-containing and tar-containing coal gas is distributed to the air inlet branch pipes connected with each dust removal unit by the air inlet main pipe, is respectively guided to the filter bed through the guide plates, is subjected to dust removal through the filter materials on the filter bed, and finally enters the next working procedure through the air outlet pipe;
when the gas pressure in the gas outlet pipe is reduced to 50% -80% of the pressure in the initial operation, closing a valve of the gas outlet pipe, opening a valve of a back-blowing gas pipe, introducing clean gas at 300-550 ℃, back-blowing dust carried in the filter material to a material storage dust bin, closing the valve of the back-blowing gas pipe after the back-blowing is finished, opening the valve of the gas outlet pipe, and removing dust again on the gas;
when the gas flow in the gas outlet pipe is reduced to be less than 50% of the flow in the initial operation, closing a control valve arranged in the gas inlet branch pipe, closing valves in the gas outlet pipe and the back-blowing gas pipe, lifting the filter bed by a discharging rod controlled by a motor to dump the filter material into a material storage dust bin, restoring the discharging rod to the original position, adding new filter material into the filter bed through a feeding pipe, driving the material leveling rod to rotate by a material leveling rod controlled by the motor to uniformly spread the newly added filter material, then opening the control valve arranged in the gas inlet branch pipe and the valve in the back-blowing gas pipe, introducing clean gas at 300-550 ℃, preheating the newly added filter material and the filter bed, after preheating, closing the valve in the back-blowing gas pipe, opening the valve in the gas outlet pipe, and starting a new gas purification process.
Due to the adoption of the technical scheme, the invention has the following beneficial effects:
according to the dust removal device for the dust-containing and tar-containing gas, the dust-containing and tar-containing gas is distributed to the gas inlet branch pipes connected with each dust removal unit through the gas inlet main pipe, is guided to the filter bed through the guide plates in each dust removal unit, enters the gas purification chamber after being filtered and dedusted by the filter materials, and enters the next process through the gas outlet pipe, so that the purification of the dust-containing and tar-containing gas is completed; before gas purification, clean gas at 200-550 ℃ is introduced through a blowback pipe to preheat a filter material and a filter bed so as to ensure that the temperature of the filter bed and the filter material is close to that of the dust-containing and tar-containing gas and reduce tar condensation. The motor controls the discharge rod 12 to lift the filter bed 13 to dump the filter material 14 into the storage/dust bin 6, new filter material falls into the filter bed through the feed pipe, the leveling rod control rod 10 drives the leveling rod 11 to rotate, the filter material 14 is uniformly spread, and the purpose of replacing the filter material on line is achieved; the invention effectively solves the problem that the filter material is bonded by tar to lose the filtering effect, does not influence the positive production of devices and processes, and can stably run for a long period.
Drawings
FIG. 1 is a schematic structural view of the present invention;
in the figure: 1. an intake manifold; 2. air inlet branch pipes; 3. a feed pipe; 4. an air outlet pipe; 5. a gas purifying chamber; 6. a storage dust bin; 7. a dust discharge port; 8. a control valve; 9. a baffle; 10. a leveling rod control rod; 11. material leveling rods; 12. a discharge rod; 13. a filter bed; 14. filtering the material; 15. a striker plate; 16. a blowback gas pipe; 17. a housing.
Detailed Description
The present invention will be explained in detail by the following examples, which are disclosed for the purpose of protecting all technical improvements within the scope of the present invention.
The dust removing device for the coal gas containing dust and tar, which is described with reference to the attached figure 1, comprises at least two dust removing units, each dust removing unit comprises a shell 17, an air inlet branch pipe 2, a storage dust bin 6 and a filtering device, one side inside the shell 17 is provided with the storage dust bin 6, the upper part of the storage dust bin 6 is provided with an air inlet cavity, the upper part of the air inlet cavity is provided with an air inlet and communicated with the air inlet branch pipe 2, the middle part of the outer side of the storage dust bin 6 is provided with the filtering device, the filtering device comprises a material leveling rod control rod 10, a material leveling rod 11, a discharging rod 12, a filtering bed 13 and a material baffle plate 15, the middle part of the outer side of the storage dust bin 6 is provided with the filtering bed 13, a filtering material 14 is paved on a filtering net of the filtering bed 13, the lower part of the filtering bed 13 is provided with an air purifying chamber 5, a discharging rod assembly with a connecting rod structure is, the upper part of the inner side of the filter bed 13 is provided with a vertical material leveling rod control rod 10, the lower part of the material leveling rod control rod 10 is connected with a horizontal material leveling rod 11, the material leveling rod 11 is arranged on a filter material 14, the outer sides of the air purifying chambers 5 are respectively provided with an air outlet pipe 4, the air outlet pipe 4 is provided with a back-blowing air pipe 16, and the bottom of the storage dust bin 6 is respectively provided with a material discharging dust outlet 7. .
The dust removing device for the dust-containing and tar-containing gas is characterized in that an air inlet main pipe 1 is arranged on the upper portion of a dust removing unit shell 17, an air inlet branch pipe 2 arranged on the upper portion of an air inlet cavity of each dust removing unit is communicated with the air inlet main pipe 1, a guide plate 9 is arranged at the position of an air inlet in the air inlet cavity of each dust removing unit, and the guide plate 9 is obliquely arranged towards a filter bed 13.
In the dust removing device for the gas containing dust and tar, the filtering bed 13 of the dust removing unit adopts a metal or ceramic filtering net.
The dust removing device for the gas containing dust and tar is characterized in that the upper parts of two sides of a shell 17 of the dust removing unit are provided with feed pipes 3, and the feed pipes 3 are arranged corresponding to the upper part and the lower part of a filter bed 13 in the dust removing unit.
The dust collecting device of the gas containing dust and tar is characterized in that a dust storage bin 6 of the dust collecting unit is arranged up and down corresponding to the air inlet cavity.
The dust removing device for the gas containing dust and tar is characterized in that the air inlet branch pipes 2 are respectively provided with a control valve 8, and the air outlet pipe 4 and the back blowing pipe 16 are respectively provided with a valve.
The dust removal device for the gas containing dust and tar is characterized in that the upper end of the material leveling rod control rod 10 and the outer end of the discharging rod 12 are arranged outside the shell 17, and high-temperature-resistant sealing pieces are arranged at the penetrating positions of the material leveling rod control rod 10, the discharging rod 12 and the shell 17.
In the dust removing device for the gas containing dust and tar, the inner end of a horizontal discharging rod 12 of a discharging rod assembly is fixedly connected with the lower part of a material baffle plate 15, and a hinged rod of the discharging rod assembly is hinged with an ear plate at the bottom of a filter bed 13.
The dust removing device for the gas containing dust and tar is characterized in that the upper end part of the material leveling rod control rod 10 is connected with a driving motor.
A dust removal method of gas containing dust and tar specifically comprises the following steps:
(1) introducing clean coal gas at 300-550 ℃ through the blowback pipe 16 to preheat the filter material and the filter bed 13, and preparing for the next step of coal gas purification process;
(2) the dust-containing and tar-containing gas is distributed to the gas inlet branch pipes 2 connected with each dust removal unit by the gas inlet main pipe 1, is respectively guided to the filter bed 13 by the guide plates 9, is subjected to dust removal by the filter materials 14 on the filter bed 13, and enters the gas purification chamber 5 and finally enters the next working procedure by the gas outlet pipe 4;
when the gas pressure in the gas outlet pipe 4 is reduced to 50% -80% of the pressure in the initial operation, the valve of the gas outlet pipe 4 is closed, the valve of the back-blowing pipe 16 is opened, clean gas at 300-550 ℃ is introduced, dust carried in the filter material 14 is back-blown to the material storage dust bin 6, after the back-blowing is finished, the valve of the back-blowing pipe 16 is closed, the valve of the gas outlet pipe 4 is opened, and the gas is dedusted again;
when the gas flow in the gas outlet pipe 4 is reduced to be less than 50% of the flow in the initial operation, the control valve 8 arranged in the gas inlet branch pipe 2 is closed, valves in the gas outlet pipe 4 and the back-blowing gas pipe 16 are closed, the discharging rod 12 is controlled by a motor to lift the filter bed 13 to dump the filter material 14 into the material storage/dust bin 6, the discharging rod 12 is restored to the original position, new filter material is added into the filter bed 13 through the feed pipe 3, the leveling rod control rod 10 is controlled by the motor to drive the leveling rod 11 to rotate, the newly added filter material 14 is uniformly spread, then the control valve 8 arranged in the gas inlet branch pipe 2 and the valves in the back-blowing gas pipe 16 are opened, clean gas at 300-550 ℃ is introduced to preheat the newly added filter material 14 and the filter bed 13, after preheating, the valves in the back-blowing gas pipe 16 are closed, the valves in the gas outlet pipe 4 are opened, and a new gas.
Before the dust removal device and the dust removal method of the dust-containing and tar-containing gas are used, clean gas at 300-550 ℃ is introduced through the back-blowing gas pipe 16 to preheat the filter material 14 and the filter bed 13, when the dust removal device is used, the dust-containing and tar-containing gas is distributed into the air inlet branch pipes 2 of each dust removal unit through the air inlet main pipe 1 and flows to the filter bed 13 through the guide plates 9 respectively and is filtered by the filter material 14 on the filter bed 13, the filtered gas enters the gas purification chamber 5, and finally the gas enters the next working procedure through the gas outlet pipe 4; when the gas pressure in the gas outlet pipe 4 is reduced to 50% -80% of the pressure in the initial operation, the valve of the gas outlet pipe 4 is closed, the valve of the back-blowing pipe 16 is opened, clean gas at 300-550 ℃ is introduced, dust carried in the filter material 14 is back-blown to the material storage dust bin 6, after the back-blowing is finished, the valve of the back-blowing pipe 16 is closed, the valve of the gas outlet pipe 4 is opened, and the gas is dedusted again;
when the gas flow in the gas outlet pipe 4 is reduced to be less than 50% of the flow in the initial operation, the control valve 8 arranged in the gas inlet branch pipe 2 is closed, the valves in the gas outlet pipe 4 and the back-blowing gas pipe 16 are closed, the discharging rod 12 is controlled by the motor to lift the filter bed 13, meanwhile, the inner end of the discharging rod 12 pushes the baffle plate 15 away, the filter material 14 is poured into the material storage/dust bin 6, the discharging rod 12 is restored to the original position, new filter material is added into the filter bed 13 through the feed pipe 3, the leveling rod control rod 10 is controlled by the motor to drive the leveling rod 11 to rotate, the newly added filter material 14 is uniformly spread on the filter bed 13, then the control valve 8 arranged in the gas inlet branch pipe 2 and the valve in the back-blowing gas pipe 16 are opened, clean gas at 300-550 ℃ is introduced to preheat the newly added filter material 14 and the filter bed 13, after preheating, the valve in the back-blowing gas pipe 16 is closed, the valve, starting a new gas purification process; when more than two dust removal units are arranged, the dust removal unit for carrying out back flushing or filter material replacement simultaneously is not more than 1/3 of the total number of the dust removal units, and the filter material 14 adopts a fixed filter material which is recycled, and also can adopt small-particle coke after being screened.
The present invention is not described in detail in the prior art.
The embodiments selected for the purpose of disclosing the invention, are presently considered to be suitable, it being understood, however, that the invention is intended to cover all variations and modifications of the embodiments which fall within the spirit and scope of the invention.
Claims (10)
1. The utility model provides a dust collector of dusty, tar-containing coal gas, this dust collector includes two dust removal units at least, characterized by: each dust removal unit comprises a shell, an air inlet branch pipe, a storage dust bin and a filtering device, wherein the storage dust bin is arranged on one side inside the shell, an air inlet cavity is formed in the upper portion of the storage dust bin, an air inlet is formed in the upper portion of the air inlet cavity and communicated with the air inlet branch pipe, the filtering device is arranged in the middle of the outer side of the storage dust bin, the filtering device comprises a material leveling rod control rod, a material leveling rod, a discharging rod, a filtering bed and a material baffle plate, the filtering bed is arranged in the middle of the outer side of the storage dust bin, a filtering material is paved on a filtering net of the filtering bed, a gas purifying chamber is arranged at the lower portion of the filtering bed, a discharging rod assembly of a connecting rod structure is arranged in the gas purifying chamber, the material baffle plate connected with the discharging rod assembly is arranged on the inner side of the filtering bed, a vertical material leveling rod control rod is arranged on the upper portion of the inner side of the filtering bed, a horizontal material, the air outlet pipe is provided with a back-blowing air pipe, and the bottom of the storage dust bin is provided with a dust discharge port.
2. The dust removing device for the gas containing dust and tar according to claim 1, which is characterized in that: the upper part of the shell of each dust removal unit is provided with an air inlet main pipe, an air inlet branch pipe arranged on the upper part of an air inlet cavity of each dust removal unit is communicated with the air inlet main pipe, a guide plate is arranged at the position of an air inlet in the air inlet cavity of each dust removal unit, and the guide plates are obliquely arranged towards the filter bed.
3. The dust removing device for the gas containing dust and tar according to claim 1, which is characterized in that: the filtering bed of the dust removal unit adopts a metal or ceramic filtering net.
4. The dust removing device for the gas containing dust and tar according to claim 1, which is characterized in that: the upper part of the dust removal unit shell is provided with a feeding pipe, and the feeding pipe is respectively arranged corresponding to the filtering bed in the dust removal unit from top to bottom.
5. The dust removing device for the gas containing dust and tar according to claim 1, which is characterized in that: the storage dust bin and the air inlet cavity of the dust removal unit are arranged up and down correspondingly.
6. The dust removing device for the gas containing dust and tar according to claim 1, which is characterized in that: the air inlet branch pipes are provided with control valves, and the air outlet pipes and the back-blowing pipes are provided with valves.
7. The dust removing device for the gas containing dust and tar according to claim 1, which is characterized in that: the upper end of material leveling rod control rod, the outer end of discharge rod all set up in the outside of casing, and the material leveling rod control rod, the discharge rod all are equipped with high temperature resistant sealing member with wearing to establish the department of casing.
8. The dust removing device for the gas containing dust and tar according to claim 1, which is characterized in that: the inner end of a horizontal discharging rod of the discharging rod assembly is fixedly connected with the lower part of the material baffle plate, and a hinged rod of the discharging rod assembly is hinged with an ear plate at the bottom of the filter bed.
9. The dust removing device for the gas containing dust and tar according to claim 1, which is characterized in that: the upper end part of the material leveling rod control rod is connected with a driving motor.
10. A method for removing dust from a dust-laden, tar-laden gas removal apparatus as claimed in any one of claims 1 to 9, wherein: the method specifically comprises the following steps:
(1) introducing clean coal gas at 300-550 ℃ through a blowback pipe to preheat the filter material and the filter bed to 300-550 ℃, and preparing the next step of coal gas purification process;
(2) the dust-containing and tar-containing coal gas is distributed to the air inlet branch pipes connected with each dust removal unit by the air inlet main pipe, is respectively guided to the filter bed through the guide plates, is subjected to dust removal through the filter materials on the filter bed, and finally enters the next working procedure through the air outlet pipe;
when the gas pressure in the gas outlet pipe is reduced to 50% -80% of the pressure in the initial operation, closing a valve of the gas outlet pipe, opening a valve of a back-blowing gas pipe, introducing clean gas at 300-550 ℃, back-blowing dust carried in the filter material to a material storage dust bin, closing the valve of the back-blowing gas pipe after the back-blowing is finished, opening the valve of the gas outlet pipe, and removing dust again on the gas;
when the gas flow in the gas outlet pipe is reduced to be less than 50% of the flow in the initial operation, closing a control valve arranged in the gas inlet branch pipe, closing valves in the gas outlet pipe and the back-blowing gas pipe, lifting the filter bed by a discharging rod controlled by a motor to dump the filter material into a material storage dust bin, restoring the discharging rod to the original position, adding new filter material into the filter bed through a feeding pipe, driving the material leveling rod to rotate by a material leveling rod controlled by the motor to uniformly spread the newly added filter material, then opening the control valve arranged in the gas inlet branch pipe and the valve in the back-blowing gas pipe, introducing clean gas at 300-550 ℃, preheating the newly added filter material and the filter bed, after preheating, closing the valve in the back-blowing gas pipe, opening the valve in the gas outlet pipe, and starting a new gas purification process.
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| CN201911180838.2A CN111004650B (en) | 2019-11-27 | 2019-11-27 | Dust removal device and dust removal method for gas containing dust and tar |
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| CN201911180838.2A CN111004650B (en) | 2019-11-27 | 2019-11-27 | Dust removal device and dust removal method for gas containing dust and tar |
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| CN111925834A (en) * | 2020-07-03 | 2020-11-13 | 福建省气柜设备安装有限公司 | Coal gas dewatering and oil removing integrated device |
| CN113350943A (en) * | 2021-06-07 | 2021-09-07 | 湖北理工学院 | Dust removal assembly and dust removal device |
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|---|---|---|---|---|
| CN111925834A (en) * | 2020-07-03 | 2020-11-13 | 福建省气柜设备安装有限公司 | Coal gas dewatering and oil removing integrated device |
| CN111925834B (en) * | 2020-07-03 | 2021-06-18 | 中琉科技有限公司 | Coal gas dewatering and oil removing integrated device |
| CN113350943A (en) * | 2021-06-07 | 2021-09-07 | 湖北理工学院 | Dust removal assembly and dust removal device |
| CN113350943B (en) * | 2021-06-07 | 2022-05-31 | 湖北理工学院 | Dust removal assembly and dust removal device |
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| CN111004650B (en) | 2021-11-09 |
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