CN219072381U - Novel blast furnace gas bag type dust remover - Google Patents
Novel blast furnace gas bag type dust remover Download PDFInfo
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- CN219072381U CN219072381U CN202223542021.5U CN202223542021U CN219072381U CN 219072381 U CN219072381 U CN 219072381U CN 202223542021 U CN202223542021 U CN 202223542021U CN 219072381 U CN219072381 U CN 219072381U
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Abstract
The novel blast furnace gas bag type dust remover is characterized in that the body is in the shape of a cylindrical tank body, the lower end of the tank body is connected with a conical ash bin, and a dust remover supporting rod is arranged at the lower end of the tank body along the outer side; the left side of the lower end of the tank body is connected with the air inlet end of a raw gas pipeline, a clean gas chamber and a filtering system are respectively arranged in the tank body from top to bottom, an air outlet is arranged on the side wall of the tank body of the clean gas chamber, the air outlet is connected with a clean gas pipeline I outside the tank body, the clean gas pipeline I is connected with a clean gas hose, the other end of the clean gas hose is connected with a clean gas pipeline II, the clean gas pipeline is bifurcated into two pipelines, one pipeline is connected with a clean gas motor, and the other pipeline is connected with a back blowing motor; the other side of the back-blowing motor is connected with a rotary back-blowing pipeline, and the other end of the rotary back-blowing pipeline is connected with the top cover of the tank body; the filtering system comprises a plurality of filtering bags which are vertically arranged; the utility model has the beneficial effects that the same medium clean gas is used for replacing the traditional nitrogen to carry out rotary back blowing ash removal, so that the back blowing air is uniformly blown into each filter bag.
Description
Technical Field
The utility model belongs to the technical field of dangerous gas dust removal, and particularly relates to a novel blast furnace gas bag type dust remover.
Background
The blast furnace gas bag dust collector is one kind of dry dust filtering device and is used mainly in purifying coarse gas produced in blast furnace iron making, etc to reduce the pollutant content in the exhausted gas.
At present, most domestic enterprises adopt a nitrogen low-pressure pulse back-blowing bag-type dust removal process (external filtering), but the low-pressure nitrogen pulse back-blowing technology has the following defects:
1. the arrangement mode of the cloth bags in the cloth bag dust collector is limited by the injection pipes of the pulse valves, the cloth bags are required to be arranged in a horizontal and vertical mode, filter bags are not arranged in the area close to the inner wall of the cloth bag dust collector, the number of the filter bags arranged in the cloth bag dust collector is small, and the space utilization rate is low;
2. the length of the cloth bag is generally not more than 7.0 m under the limit of the blowing capacity of the pulse valve, so that the filtering area of the cloth bag cannot be increased in the length direction;
3. external power medium is consumed during back blowing: the continuous supply of nitrogen increases the operating costs;
4. the back-blowing ash removal effect is poor. Because the back blowing is performed row by row, the back blowing of the bags in the latter arrangement can influence that the bag in the former row is back blown, so that the pressure difference between the inside and the outside of the bag is fast, the back blowing ash cleaning period is short, and the frequency is high.
And if leakage occurs or sealing is not tight in the dust removal process, air enters, and explosion risks exist. Therefore, the blast furnace gas and other dangerous gases are purified, the treatment cost is high, the treatment difficulty is high, and a mechanical system which is simple, reasonable and easy to operate is needed to solve the problems.
Disclosure of Invention
The utility model provides a novel blast furnace gas bag type dust collector which has the advantages of reasonable arrangement of filter bags, high dust collection efficiency, dust content reaching below 5mg/m < 3 >, simple back blowing structure, safety and stability, and solves the problems in the background technology.
The scheme of the utility model is as follows: the novel blast furnace gas bag type dust remover comprises a body, wherein the body is in a cylindrical tank body, edges of the tank body are arc transition, the lower end of the tank body is connected with a conical ash bin with a wide upper opening and a narrow lower opening, and a plurality of dust remover supporting rods are welded at the lower end of the tank body along the outer side; the left side of the lower end of the tank body is connected with the air inlet end of a raw gas pipeline, a clean gas chamber and a filtering system are respectively arranged in the tank body from top to bottom, a tank body air outlet is arranged on the side wall of the tank body of the clean gas chamber, the tank body air outlet is connected with a clean gas pipeline I outside the tank body, a clean gas pneumatic eccentric butterfly valve and a clean gas glasses valve are sequentially arranged on the clean gas pipeline I along the air outlet direction of the pipeline, and finally connected with a clean gas hose, the other end of the clean gas hose is connected with a clean gas pipeline II, the clean gas pipeline II is bifurcated into two pipelines, one pipeline is connected with a clean gas motor, and the other pipeline is connected with a back blowing motor; the other side of the back-blowing motor is connected with a rotary back-blowing pipeline, a rotary back-blowing pneumatic eccentric butterfly valve is arranged on the rotary back-blowing pipeline, and the other end of the rotary back-blowing pipeline is connected with the top cover of the tank body; the other side of the clean gas motor is connected with a clean gas output pipeline; the filtering system comprises a plurality of vertically placed filtering bags, the length of each filtering bag is not less than 8 m, the length-diameter ratio of each filtering bag is not less than 26.6, the gap between the filtering bags is 1/5 of the diameter of each filtering bag, steel cylinder shrink-proof rings are sewn on the filtering bags at equal intervals along the length direction, the upper ends of the filtering bags are fixed on an upper pattern plate through upper flanging clamps, and the lower ends of the filtering bags are fixed on a lower pattern plate through lower sleeve clamps; the tank body is provided with a back blowing and dust removing conversion integrated circuit control module, and the right lower side of the tank body is provided with a differential pressure transmitter.
The clean gas motor and the back blowing motor are respectively arranged in two.
The conical ash bin is winded with a steam heating pipe, and the lower end of the conical ash bin is provided with a discharger.
The gas inlet end of the raw gas pipeline is connected with the left side of the lower end of the tank body, and the raw gas pipeline is provided with a raw gas pneumatic eccentric butterfly valve and a raw gas glasses valve.
The filter system is of an internal filter structure, a plurality of filter bags which are vertically arranged in the filter system are arranged in a star-shaped array in the horizontal direction, and the filter bags are made of high-resistant Wen Bo fiber bulked film filter materials.
The rotary back-blowing pipeline stretches into the top cover of the tank body, and the tail end of the rotary back-blowing pipeline is provided with shower heads uniformly distributed with air flow.
An upper manhole is arranged above an upper pattern plate in the tank body, and a lower manhole is arranged above a lower pattern plate.
In the work, the specific dust removal flow is that raw gas enters the dust remover from the raw gas pipeline through the raw gas eyeglass valve and the raw gas pneumatic eccentric butterfly valve from the inlet of the lower dust remover body, passes through the filter bag from bottom to top from the inside of the filter bag to reach the air purifying chamber, and under the action of the clean gas fan, clean gas enters the clean gas pipeline from the clean gas pneumatic eccentric butterfly valve and the clean gas eye valve at the outlet of the dust remover body to complete the filtering process.
The rotary back-blowing ash removal is started when the pressure difference transmitter detects that the front and rear pressure differences of the dust remover tank body are too high; the specific working flow is that the clean gas pneumatic eccentric butterfly valve at the outlet above the tank body of the unit dust remover is closed by the control function of the back blowing and dust removing conversion integrated circuit control module, meanwhile, the back blowing pneumatic eccentric butterfly valve is opened, the clean gas with the same medium led out from the clean gas pipeline is pressurized by the back blowing motor, and enters the dust remover body from the top cover of the tank body by the back blowing pneumatic eccentric butterfly valve, the clean gas flow is opposite to the raw gas flow, and the clean gas flow passes through the filter bag to blow down the dust attached inside and outside the filter bag and falls into the conical ash bin at the lower part of the dust remover body.
An upper manhole is arranged above an upper pattern plate in the tank body, and a lower manhole is arranged above a lower pattern plate; the purpose of setting up like this is in order to conveniently change filtration system filter bag, and go up manhole and lower manhole and all be for making things convenient for personnel to get in and out the jar body and carry out maintenance and filter bag change.
The right lower side of the tank body is provided with a differential pressure transmitter, and the purpose of the arrangement is to control the start of ash removal through a blowback and dust removal conversion integrated circuit control module when the differential pressure transmitter detects that the front and rear differential pressure of the dust remover body is too high; otherwise, when the differential pressure transmitter detects that the pressure difference inside the tank body is greatly reduced, a plurality of filter bags of the filtering system are damaged and need to be replaced.
The rotary back-blowing pipeline extends into the top cover of the tank body, and the tail end of the rotary back-blowing pipeline is provided with shower heads uniformly distributed with air flow; the purpose of setting like this is to make blowback clean gas in time and simultaneously the equipartition blow into each filter bag and carry out blowback deashing operation.
The left side of the lower end of the tank body is connected with the air inlet end of a raw gas pipeline, a clean gas chamber and a filtering system are respectively arranged in the tank body from top to bottom, a tank body air outlet is formed in the side wall of the tank body of the clean gas chamber, the tank body air outlet is connected with a clean gas pipeline I outside the tank body, a clean gas pneumatic eccentric butterfly valve and a clean gas glasses valve are sequentially arranged on the clean gas pipeline I along the air outlet direction of the pipeline, the clean gas pneumatic eccentric butterfly valve and the clean gas glasses valve are finally connected with a clean gas hose, the other end of the clean gas hose is connected with a clean gas pipeline II, the clean gas pipeline is bifurcated into two pipelines, one pipeline is connected with a clean gas motor, and the other pipeline is connected with a back blowing motor; the other side of the back-blowing motor is connected with a rotary back-blowing pipeline, a rotary back-blowing pneumatic eccentric butterfly valve is arranged on the rotary back-blowing pipeline, and the other end of the rotary back-blowing pipeline is connected with the top cover of the tank body; the purpose of the arrangement is to use the clean gas with the same medium to replace the traditional nitrogen for rotary back-blowing ash removal.
The beneficial effects of the utility model are as follows:
1. the utility model uses the same medium clean gas to replace the traditional nitrogen to carry out rotary back-blowing ash removal; the tail end of the rotary back blowing pipeline is provided with air flow uniformly distributed shower heads, so that back blowing air is uniformly blown into each filter bag.
2. The utility model adopts the internal filtering mode, the filter bags are reasonably arranged, the filter bag gaps are 1/5 of the diameter of the filter bags, and the filter bags are ensured not to generate friction in the gas blowing process, thereby ensuring the service life of the filter materials. The area ratio of the clean gas to the raw gas in the dust remover body in the air flow direction is as follows: 2.12. the bag of the dust removing box body has high integration level, large unit filtering area, low manufacturing cost and safe and reliable operation.
3. The dust remover body is designed to be in full-arc transition, so that the characteristics of a pressurized container are fully considered, and the stress concentration in the dust remover body is thoroughly eliminated. The top cover of the dust remover body adopts an arc design, which is also beneficial to improving the stress concentration of the dust remover body.
4. The utility model can realize off-line non-damping-down switching, and can realize the non-damping-down of the front-end dust remover unit through the precisely designed back-blowing and dust removing conversion integrated circuit control module, thereby improving the operation rate, and the dust remover performs off-line back-blowing instead of the blowing limitation of the traditional pulse valve with time interval.
5. In the utility model, besides pneumatic butterfly valves are arranged at the inlet and outlet of the dust collector body, glasses valves are additionally arranged. Because national standard allows the butterfly valve to have the volume of leaking, can not play absolute sealed effect through closing the butterfly valve, the dust collecting equipment that this application provided through closing pneumatic butterfly valve, closes pneumatic glasses valve again, can play very big limit's cutting action, has effectively realized not having a power failure, shut down, just can overhaul and the sack is changed dust remover unit, has effectively ensured staff's personal safety, environmental protection.
Drawings
(1) FIG. 1 is a diagram of the structure of a novel blast furnace gas bag filter of the present utility model;
(2) FIG. 2 is a diagram of a specific tank structure of a novel blast furnace gas bag collector according to the present utility model;
(3) FIG. 3 is a diagram of a novel blast furnace gas bag collector filter bag layout of the present utility model;
(4) The marks in the figure: 1. raw gas pipeline; 2. a clean gas pipeline I; 3. raw gas glasses valve; 4. pneumatic eccentric butterfly valve for raw gas; 5. a gas purifying chamber; 6. a dust collector tank; 7. a filter bag; 8. a differential pressure transmitter; 9. an ash bin; 10.steam heating pipeThe method comprises the steps of carrying out a first treatment on the surface of the 11. Pneumatic eccentric butterfly valve of clean gas; 12. a clean gas eyeglass valve; 13. a clean gas hose; 14. a clean gas pipeline II; 15. a clean gas motor; 16. a back-blowing motor; 17. a rotary back-blowing pipeline; 18. back-blowing pneumatic eccentric butterfly valve; 19. shower heads are uniformly distributed on the air flow; 20. a top cover; 21. an upper manhole 21; 22. an upper faceplate 22; 23. flanging and clamping; 24. shrink-proof ring of steel cylinder; 25. a lower manhole; 26. a lower pattern plate; 27. a sleeve clamp; 28. a dust collector support bar.
Detailed Description
According to the figures 1 and 2, the novel blast furnace gas bag type dust remover comprises a body, wherein the body is in a cylindrical tank body, edges of the tank body are all arc transition, the lower end of the tank body is connected with a conical ash bin 9 with a wide upper opening and a narrow lower opening, and a plurality of dust remover supporting rods 28 are arranged on the outer side of the lower end of the tank body; the left side of the lower end of the tank body is connected with the air inlet end of a raw gas pipeline 1, the inside of the tank body is respectively provided with a gas purifying chamber 5 and a filtering system from top to bottom, the side wall of the tank body of the gas purifying chamber 5 is provided with a tank body air outlet, the tank body air outlet is connected with a clean gas pipeline I outside the tank body, a clean gas pneumatic eccentric butterfly valve 11 and a clean gas glasses valve 12 are sequentially arranged on the clean gas pipeline I2 along the pipeline air outlet direction and are finally connected with a clean gas hose 13, the other end of the clean gas hose 13 is connected with a clean gas pipeline II 14, the clean gas pipeline II 14 is bifurcated into two pipelines, one pipeline is connected with a clean gas motor 15, and the other pipeline is connected with a blowback motor 16; the other side of the back-blowing motor 16 is connected with a rotary back-blowing pipeline 17, a rotary back-blowing pneumatic eccentric butterfly valve 18 is arranged on the rotary back-blowing pipeline 17, and the other end of the rotary back-blowing pipeline 17 is connected with a tank top cover 20; the other side of the clean gas motor 15 is connected with a clean gas output pipeline; the filtering system comprises a plurality of filtering bags 7 which are vertically arranged, the length of the filtering bags 7 is not less than 8 m, the length-diameter ratio is not less than 26.6, the gap between the filtering bags 7 is 1/5 of the diameter of the filtering bags 7, steel cylinder shrink-proof rings 24 are sewn on the filtering bags 7 at equal intervals along the length direction, the upper ends of the filtering bags 7 are fixed on an upper flower plate 22 through upper flanging clamps 23, and the lower ends of the filtering bags 7 are fixed on a lower flower plate 26 through lower sleeve clamps 27; the tank body is provided with a back blowing and dust removing conversion integrated circuit control module, and the right lower side of the tank body is provided with a differential pressure transmitter 8; the air inlet end of the raw gas pipeline 1 is connected with the left side of the lower end of the tank body, and the raw gas pipeline 1 is provided with a raw gas pneumatic eccentric butterfly valve 4 and a raw gas glasses valve 3; the filter system is of an internal filter structure, a plurality of filter bags 7 are vertically arranged in the filter system and are arranged in a star-shaped array in the horizontal direction, and the filter bags 7 are made of high-resistant Wen Bo fiber bulked film filter materials; the rotary back-blowing pipeline 17 extends into the top cover 20 of the tank body, and the tail end of the rotary back-blowing pipeline is provided with air flow uniformly distributed showers 19; an upper manhole 21 is arranged above the upper flower plate 22 in the tank body, and a lower manhole 25 is arranged above the lower flower plate 26; the conical ash bin is winded with a steam heating pipe 10, and the lower end of the conical ash bin is provided with a discharger.
The specific working flow steps are as follows:
(1) And (3) filtering: raw gas enters the dust collector from the raw gas pipeline 1 through the raw gas eyeglass valve 3 and the raw gas pneumatic eccentric butterfly valve 4 from the inlet of the lower dust collector body, passes through the filter bag 7 from bottom to top from the inside of the filter bag 7 to reach the air purifying chamber 5, and under the action of the clean gas fan, clean gas enters the clean gas pipeline from the clean gas pneumatic eccentric butterfly valve 11 and the clean gas eyeglass valve at the outlet of the dust collector body to complete the filtering process.
(2) Back blowing ash removal: when the pressure difference of the front and rear sides of the dust remover tank body 6 is measured by the pressure difference transmitter 8, and when the dust is accumulated in the dust remover unit and the dust is removed by back blowing, the clean gas pneumatic eccentric butterfly valve 11 at the outlet of the dust remover body of the dust remover unit is closed by the back blowing and dust removing conversion integrated circuit control module, the clean gas with the same medium is led out from the clean gas pipeline, pressurized by the back blowing blower, enters the dust remover body of the dust remover unit from the tank body top cover 20 by the back blowing pneumatic eccentric butterfly valve 18, the clean gas flow is opposite to the flow direction of the gas to be filtered, passes through the filter bag 7, blows dust attached to the inner and outer sides of the filter bag 7, and falls into the conical ash bin 9 at the lower part of the dust remover body.
(3) And (3) overhauling: when the pressure difference of the dust collector tank body 6 is detected to be greatly reduced through the measurement of the pressure difference transmitter 8, the filter bag 7 in the filter system is damaged and needs to be replaced.
The dust remover usually works in the filtering step (1), when the pressure difference of the front and rear sides of the dust remover tank body 6 is measured by the pressure difference transmitter 8, the back blowing dust removing work is started and the filtering dust removing work is suspended under the control of the back blowing dust removing conversion integrated circuit control module, when the pressure difference of the dust remover tank body 6 is detected to be greatly reduced, the fact that the filter bag 7 in the filtering system is damaged is indicated to be replaced is indicated, and at the moment, the dust removing equipment can stop to replace the filter bag 7 in the overhauling step (3) and other overhauling works.
The utility model has the beneficial effects that the same medium clean gas is used for replacing the traditional nitrogen to carry out rotary back-blowing ash removal; the tail end of the rotary back blowing pipeline 17 is provided with air flow uniformly distributed showers 19, so that back blowing air is uniformly blown into each filter bag 7; the filtering mode adopts internal filtering, the arrangement of the filter bags 7 is reasonable, the gaps between the filter bags 7 are 1/5 of the diameters of the filter bags 7, and the filter bags 7 are ensured not to generate friction in the gas injection process, so that the service life of the filter materials is ensured. The area ratio of the clean gas to the raw gas in the dust remover body in the air flow direction is as follows: 2.12. the bag integration level of the dust removing box body is high, the unit filtering area is large, the manufacturing cost is reduced, and the operation is safe and reliable; the tank body is designed into full-arc transition, so that the characteristics of the pressurized container are fully considered, and the stress concentration in the dust remover body is thoroughly eliminated. The top cover 20 of the dust remover body adopts an arc design, which is also beneficial to improving the stress concentration of the dust remover body; the novel blast furnace gas bag type dust remover can realize off-line non-damping switching, and the front-end dust remover unit can not damping through a precisely designed back-blowing and dust removal conversion integrated circuit control module, so that the operation rate is improved, and the dust remover performs off-line back blowing; besides pneumatic butterfly valves are arranged at the inlet of the dust collector tank 6 and the outlet of the dust collector tank 6, glasses valves are additionally arranged. Because national standard allows the butterfly valve to have the volume of leaking, can not play absolute sealed effect through closing the butterfly valve, the dust collecting equipment that this application provided through closing pneumatic butterfly valve, closes pneumatic glasses valve again, can play very big limit's cutting action, has effectively realized not having a power failure, shut down, just can overhaul and the sack is changed dust remover unit, has effectively ensured staff's personal safety, environmental protection.
Claims (7)
1. The utility model provides a novel blast furnace gas bag collector which characterized in that: the dust collector comprises a body, wherein the body is in a cylindrical tank body, edges of the tank body are arc transition, the lower end of the tank body is connected with a conical ash bin with a wide upper opening and a narrow lower opening, and a plurality of dust collector supporting rods are welded at the lower end of the tank body along the outer side; the left side of the lower end of the tank body is connected with the air inlet end of a raw gas pipeline, a clean gas chamber and a filtering system are respectively arranged in the tank body from top to bottom, a tank body air outlet is arranged on the side wall of the tank body of the clean gas chamber, the tank body air outlet is connected with a clean gas pipeline I outside the tank body, a clean gas pneumatic eccentric butterfly valve and a clean gas glasses valve are sequentially arranged on the clean gas pipeline I along the air outlet direction of the pipeline, and finally connected with a clean gas hose, the other end of the clean gas hose is connected with a clean gas pipeline II, the clean gas pipeline II is bifurcated into two pipelines, one pipeline is connected with a clean gas motor, and the other pipeline is connected with a back blowing motor; the other side of the back-blowing motor is connected with a rotary back-blowing pipeline, a rotary back-blowing pneumatic eccentric butterfly valve is arranged on the rotary back-blowing pipeline, and the other end of the rotary back-blowing pipeline is connected with the top cover of the tank body; the other side of the clean gas motor is connected with a clean gas output pipeline; the filtering system comprises a plurality of vertically placed filtering bags, the length of each filtering bag is not less than 8 m, the length-diameter ratio of each filtering bag is not less than 26.6, the gap between the filtering bags is 1/5 of the diameter of each filtering bag, steel cylinder shrink-proof rings are sewn on the filtering bags at equal intervals along the length direction, the upper ends of the filtering bags are fixed on an upper pattern plate through upper flanging clamps, and the lower ends of the filtering bags are fixed on a lower pattern plate through lower sleeve clamps; the tank body is provided with a back blowing and dust removing conversion integrated circuit control module, and the right lower side of the tank body is provided with a differential pressure transmitter.
2. The novel blast furnace gas bag filter according to claim 1, wherein: the clean gas motor and the back blowing motor are respectively arranged.
3. The novel blast furnace gas bag filter according to claim 1, wherein: the conical ash bin is winded with a steam heating pipe, and the lower end of the conical ash bin is provided with a discharger.
4. The novel blast furnace gas bag filter according to claim 1, wherein: the gas inlet end of the raw gas pipeline is connected with the left side of the lower end of the tank body, and the raw gas pipeline is provided with a raw gas pneumatic eccentric butterfly valve and a raw gas glasses valve.
5. The novel blast furnace gas bag filter according to claim 1, wherein: the filter system is of an internal filter structure, a plurality of filter bags are vertically arranged in the filter system and are arranged in a star-shaped array in the horizontal direction, and the filter bags are made of high Wen Bo fiber bulked film-coated filter materials.
6. The novel blast furnace gas bag filter according to claim 1, wherein: the rotary back-blowing pipeline stretches into the top cover of the tank body, and the tail end is provided with air flow uniformly distributed showers.
7. The novel blast furnace gas bag filter according to claim 1, wherein: an upper manhole is arranged above an upper pattern plate in the tank body, and a lower manhole is arranged above a lower pattern plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223542021.5U CN219072381U (en) | 2022-12-30 | 2022-12-30 | Novel blast furnace gas bag type dust remover |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223542021.5U CN219072381U (en) | 2022-12-30 | 2022-12-30 | Novel blast furnace gas bag type dust remover |
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| Publication Number | Publication Date |
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| CN219072381U true CN219072381U (en) | 2023-05-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202223542021.5U Active CN219072381U (en) | 2022-12-30 | 2022-12-30 | Novel blast furnace gas bag type dust remover |
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| CN (1) | CN219072381U (en) |
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