CN115253511A - Device and method for drying dry dedusting filter bag - Google Patents
Device and method for drying dry dedusting filter bag Download PDFInfo
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- CN115253511A CN115253511A CN202210797235.2A CN202210797235A CN115253511A CN 115253511 A CN115253511 A CN 115253511A CN 202210797235 A CN202210797235 A CN 202210797235A CN 115253511 A CN115253511 A CN 115253511A
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- filter bag
- dust removal
- butterfly valve
- box body
- explosion
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- 238000001035 drying Methods 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 title claims abstract description 16
- 239000000428 dust Substances 0.000 claims abstract description 62
- 238000010438 heat treatment Methods 0.000 claims abstract description 35
- 239000000919 ceramic Substances 0.000 claims abstract description 33
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 19
- 238000004880 explosion Methods 0.000 claims abstract description 16
- 238000007664 blowing Methods 0.000 claims abstract description 8
- 238000001914 filtration Methods 0.000 claims abstract description 8
- 238000009434 installation Methods 0.000 claims abstract description 8
- 239000003034 coal gas Substances 0.000 claims description 7
- 230000005855 radiation Effects 0.000 claims description 4
- 230000006978 adaptation Effects 0.000 claims description 3
- 238000000926 separation method Methods 0.000 claims description 3
- 230000006872 improvement Effects 0.000 description 6
- 238000007791 dehumidification Methods 0.000 description 5
- 238000010521 absorption reaction Methods 0.000 description 4
- 210000000988 bone and bone Anatomy 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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Classifications
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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
- B01D46/02—Particle separators, e.g. dust precipitators, having hollow filters made of flexible material
- B01D46/06—Particle separators, e.g. dust precipitators, having hollow filters made of flexible material with means keeping the working surfaces flat
-
- 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
- B01D46/02—Particle separators, e.g. dust precipitators, having hollow filters made of flexible material
- B01D46/04—Cleaning filters
-
- 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
- B01D46/42—Auxiliary equipment or operation thereof
-
- 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
- B01D46/42—Auxiliary equipment or operation thereof
- B01D46/4263—Means for active heating or cooling
-
- 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
- B01D46/42—Auxiliary equipment or operation thereof
- B01D46/44—Auxiliary equipment or operation thereof controlling filtration
- B01D46/448—Auxiliary equipment or operation thereof controlling filtration by temperature measuring
-
- 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
- B01D46/88—Replacing filter elements
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/22—Dust arresters
Abstract
The invention provides a device and a method for drying a filter bag for dry dedusting, which relate to the technical field of filter bag treatment in the metallurgical industry and comprise an anti-explosion ceramic heating pipe and an installation part, wherein the anti-explosion ceramic heating pipe is installed at the middle position inside the filter bag through the installation part; the anti-explosion ceramic heating pipe is additionally arranged in the middle of the filter bag of the dust removal box body, the filter bag is heated and dried, dust on the outer wall of the filter bag is dried, water vapor is brought to a clean gas main pipe by a small amount of flowing gas, the filter bag is subjected to back blowing, the dust on the outer wall of the filter bag falls off, the filtering area of the filter bag is conveniently and effectively recovered, the pressure difference of the filter bag is effectively reduced, the application range is wide, and the anti-explosion ceramic heating pipe is suitable for the situation that blast furnaces and dry dust removal systems with any volumes respond to the temperature of raw gas.
Description
Technical Field
The invention relates to the technical field of filter bag treatment in the metallurgical industry, in particular to a device and a method for drying a dry dedusting filter bag.
Background
In iron and steel enterprises, blast furnace gas is used as an important energy medium, the temperature and the water content of the blast furnace gas have great influence on a subsequent dry dedusting process, the blast furnace raw gas has low temperature and high water content, the water content is easy to be separated out on a dry dedusting filter bag and cannot fall off through normal drying and injection, the pressure difference of the filter bag is higher, the filter bag is damaged or jumped seriously, the gas dust concentration exceeds the standard, the subsequent TRT and a pipeline are seriously washed, the TRT blade breakage, the pipeline perforation and other accidents are easy to cause, and finally the blast furnace is forced to stop wind, so the blast furnace raw gas low temperature and high water content condition can be dealt with, and the blast furnace raw gas low temperature and high water content condition is a very important subject of a dry dedusting system;
in the prior art, the following means are generally adopted for processing: conveying the blast furnace gas to a gravity dust collector, carrying out coarse dust removal on the blast furnace gas, conveying the blast furnace gas subjected to coarse dust removal into a moisture absorption device, and carrying out dehumidification treatment on the blast furnace gas; controlling the temperature of the blast furnace gas after dehumidification treatment to be 100-250 ℃ by a temperature controller; sending the blast furnace gas into a bag-type dust collector for further dust removal, sending the removed dust into a dust storage tank for storage and collection, sending the dust-removed blast furnace gas into a pressure reducing valve group through a gas pipeline for pressure reduction, generating power through a blast furnace gas residual pressure turbine generating set, sending the pressure-reduced blast furnace gas into a gas pipe network for recycling, and adding moisture absorption, dehumidification and heating treatment aiming at the possible low-temperature blast furnace gas condition in the process;
however, the above-mentioned technique has the disadvantage that it is only suitable for a volume of 800 to 1000m3The blast furnace is not suitable for the blast furnace with larger volume and larger raw gas flow, and the application of the moisture absorption and dehumidification device in a blast furnace dry dust removal system with larger volume is limited because the moisture absorption and dehumidification device added in the technology is limited, so that the device and the method for drying the dry dust removal filter bag are provided to solve the problems in the prior art.
Disclosure of Invention
Aiming at the problems, the invention provides a device and a method for drying a dry dust removal filter bag, which have wide application range and are suitable for the condition that blast furnaces and dry dust removal systems with any volume deal with the temperature of raw coke oven gas.
In order to realize the purpose of the invention, the invention is realized by the following technical scheme: a device for drying a dry dedusting filter bag comprises an explosion-proof ceramic heating pipe and a mounting part, wherein the explosion-proof ceramic heating pipe is mounted at the middle position inside the filter bag through the mounting part, the filter bag is arranged inside a dedusting box body, a cage rib is arranged above the inside of the dedusting box body, a fixing ring is arranged on the cage rib, the filter bag is arranged below the fixing ring, an opening at the upper end of the filter bag is communicated with the fixing ring, and the bottom of the filter bag is a closed end;
the upper end and the lower end of one side of the dust removal box body are respectively communicated with an outlet pipe and an inlet pipe, an outlet butterfly valve is arranged on the outlet pipe, and an inlet butterfly valve is arranged on the inlet pipe.
The further improvement lies in that: the installation department includes buckle and link, the link erects the top in the explosion-proof ceramic heating pipe outside, the outer end at the link is connected to the buckle, the inboard of buckle is equipped with the draw-in groove with retainer plate lateral wall thickness looks adaptation.
The further improvement lies in that: the cage bone separates the upper and lower ends of the interior of the dust removal box body and seals the separation position, and the fixing ring is communicated with the upper and lower ends of the interior of the dust removal box body.
The further improvement lies in that: the communicating part of the outlet pipe and the dust removal box body is positioned above the opening of the filter bag, and the communicating part of the inlet pipe and the dust removal box body is positioned below the closed end of the filter bag.
A method for drying a dry dedusting filter bag comprises the following steps:
s1: an anti-explosion ceramic heating pipe is additionally arranged and fixed between the cage bones and the filter bag, and the anti-explosion ceramic heating pipe generates heat and transmits the heat radiation to the cage bones and the filter bag;
s2: controlling the temperature of the inner wall of the filter bag, and continuously drying;
s3: along with the temperature rise, the moisture attached to the filter bag is continuously vaporized;
s4: controlling the opening of the inlet butterfly valve and the outlet butterfly valve, wherein the coal gas flowing through the dust removal box enters from the inlet butterfly valve, carries vaporized water through the filter bag, and flows to the clean coal gas main pipe through the outlet butterfly valve;
s5: after the dust attached to the filter bag is completely dried, the filter bag is blown through a back blowing system of the dust removal box body, and the dust is blown off;
s6: and after the filtering area of the filter bag and the pressure difference of the filter bag are recovered, completely opening the inlet butterfly valve and the outlet butterfly valve, and putting into use.
The further improvement lies in that: and in the S2, the temperature of the inner wall of the filter bag is controlled to be 150-200 ℃.
The further improvement lies in that: and in the S4, the opening degrees of the inlet butterfly valve and the outlet butterfly valve are controlled to be closed by 90-95%.
The further improvement is that: and in the S4, the vaporized water carried by the coal gas flows to the clean gas main pipe through the outlet butterfly valve and is separated out in the clean gas main pipe condensed water drainer.
The invention has the beneficial effects that:
1. the anti-explosion ceramic heating pipe is additionally arranged in the middle of the filter bag of the dust removal box body, the filter bag is heated and dried, dust on the outer wall of the filter bag is dried, water vapor is brought to a clean gas main pipe by a small amount of flowing gas, the filter bag is subjected to back blowing, the dust on the outer wall of the filter bag falls off, the filtering area of the filter bag is conveniently and effectively recovered, the pressure difference of the filter bag is effectively reduced, the application range is wide, and the anti-explosion ceramic heating pipe is suitable for the situation that blast furnaces and dry dust removal systems with any volumes respond to the temperature of raw gas.
2. The invention has convenient operation, only needs to operate the inlet butterfly valve and the outlet butterfly valve of the dust removal box body, and does not need to operate the gate valve and the gas replacement of the dust removal box body.
3. The invention has low use cost, and the explosion-proof ceramic heating pipe can be repeatedly used if protective disassembly and reinstallation are carried out when the filter bag needs to be replaced.
Drawings
FIG. 1 is a front view of the apparatus of the present invention;
FIG. 2 is a schematic view of the installation of an explosion-proof ceramic heating tube of the present invention;
FIG. 3 is a schematic view of the buckle of the present invention;
FIG. 4 is a flow chart of the method of the present invention.
Wherein: 1. an explosion-proof ceramic heating pipe; 2. a filter bag; 3. a dust removal box body; 4. cage bones; 5. a fixed ring; 6. an outlet pipe; 7. an inlet pipe; 8. an outlet butterfly valve; 9. an inlet butterfly valve; 10. buckling; 11. a connecting frame.
Detailed Description
In order to further understand the present invention, the following detailed description will be made with reference to the following examples, which are only used for explaining the present invention and are not to be construed as limiting the scope of the present invention.
Example one
According to the drawings of fig. 1, 2 and 3, the embodiment provides a device for drying a filter bag for dry dedusting, which comprises an explosion-proof ceramic heating pipe 1 and a mounting part, wherein the explosion-proof ceramic heating pipe 1 is mounted at the middle position inside the filter bag 2 through the mounting part, the filter bag 2 is arranged inside a dedusting box body 3, a cage frame 4 is arranged above the inside of the dedusting box body 3, a fixing ring 5 is arranged on the cage frame 4, the filter bag 2 is arranged below the fixing ring 5, an opening at the upper end of the filter bag 2 is communicated with the fixing ring 5, and the bottom of the filter bag 2 is a closed end;
the upper end and the lower end of one side of the dust removal box body 3 are respectively communicated with an outlet pipe 6 and an inlet pipe 7, an outlet butterfly valve 8 is arranged on the outlet pipe 6, and an inlet butterfly valve 9 is arranged on the inlet pipe 7.
When the dry dedusting system is used, the anti-explosion ceramic heating pipe 1 is fixed in the middle of the filter bag 2, when the temperature of blast furnace raw gas is low and the water content is high, and when the total pressure difference of dry dedusting is not more than 5kpa, the inlet butterfly valve 9 and the outlet butterfly valve 8 of the dedusting box body 3 are closed to 90% -95%, the anti-explosion ceramic heating pipe 1 is opened, the temperature of heat radiation of the anti-explosion ceramic heating pipe 1 reaching the inner wall of the filter bag 2 is controlled to be about 150-200 ℃, the filter bag 2 is heated and dried, the water is vaporized continuously along with the temperature rise, a small amount of flowing gas is brought to a clean gas main pipe from the outlet of the dedusting box body 3, the filter bag 2 is subjected to back blowing through a filter bag back blowing system in the dedusting box body 3, the dried dust falls off from the outer wall of the filter bag 2, the filtering area of the filter bag 2 is effectively recovered, the pressure difference is obviously reduced, the inlet butterfly valve 9 and the outlet 8 of the dedusting box body 3 are opened, and the butterfly valve 3 is put into use.
The installation department includes buckle 10 and link 11, link 11 establishes the top in the 1 outside of explosion-proof ceramic heating pipe, buckle 10 is connected in link 11's outer end, buckle 10's inboard be equipped with the draw-in groove of 5 side wall thickness looks adaptations of retainer plate. On explosion-proof ceramic heating pipe 1 was fixed in retainer plate 5 through buckle 10, when guaranteeing dust removal box 3 normal operating, explosion-proof ceramic heating pipe 1 can firmly be in the center of filter bag 2, prevents that explosion-proof ceramic heating pipe 1 from contacting filter bag 2, leads to filter bag 2 to burn out because the high temperature.
The cage frame 4 separates the upper end and the lower end in the dust removal box body 3 and seals the separation position, and the fixing ring 5 is communicated with the upper end and the lower end in the dust removal box body 3. The communication position of the outlet pipe 6 and the dust removal box body 3 is positioned above the opening of the filter bag 2, and the communication position of the inlet pipe 7 and the dust removal box body 3 is positioned below the closed end of the filter bag 2. When the gas filter is used, gas enters from the inlet pipe 7, enters the filter bag 2 from the side surface of the filter bag 2 due to the closed bottom of the filter bag 2, is guided out from the upper fixing ring 5 and is discharged from the outlet pipe 6, so that the filtering operation is performed.
Example two
According to fig. 4, the embodiment proposes a method for drying a filter bag of a dry dust removal, which includes the following steps:
s1: the anti-explosion ceramic heating pipe 1 is additionally arranged and fixed between the cage frame 4 and the filter bag 2, and the anti-explosion ceramic heating pipe 1 generates heat and transmits the heat radiation to the cage frame 4 and the filter bag 2;
s2: controlling the temperature of the inner wall of the filter bag 2 to be 150-200 ℃, and continuously drying;
s3: along with the temperature rise, the moisture attached to the filter bag 2 is continuously vaporized;
s4: the opening degrees of the inlet butterfly valve 9 and the outlet butterfly valve 8 are controlled to be closed by 90-95 percent, the total pressure difference of dry dedusting is ensured not to exceed 5kpa, a small amount of gas flowing in the dedusting box body 3 enters from the inlet butterfly valve 9, carries vaporized water through the filter bag 2, passes through the outlet butterfly valve 8 to the clean gas main pipe and is separated out in a clean gas main pipe condensed water drainer;
s5: after the dust attached to the filter bag 2 is completely dried, the filter bag 2 is blown and sprayed through a back blowing system of the dust removal box body 3, and the dust is blown off;
s6: and after the filtering area of the filter bag 2 and the pressure difference of the filter bag 2 are recovered, the inlet butterfly valve 9 and the outlet butterfly valve 8 are completely opened and put into use.
According to the invention, the anti-explosion ceramic heating pipe 1 is additionally arranged in the middle of the filter bag 2 of the dust removal box body 3, when the temperature of blast furnace raw gas is low and the water content is high, after the inlet butterfly valve 9 and the outlet butterfly valve 8 of the dust removal box body 3 are closed to 90-95%, the anti-explosion ceramic heating pipe 1 is used for heating and drying the filter bag 2, so that dust on the outer wall of the filter bag 2 is dried, a small amount of flowing gas brings water vapor to a clean gas main pipe, then the filter bag 2 is subjected to back blowing, the dust on the outer wall of the filter bag 2 falls off, the filtering area of the filter bag 2 is effectively recovered, and the pressure difference of the filter bag 2 is effectively reduced; convenient operation only needs 3 import butterfly valves 9 of operation dust removal box, export butterfly valve 8, need not to operate push-pull valve and 3 coal gas replacement of dust removal box, more need not to change 3 filter bags 2 of dust removal box, and use cost is low, carries out the protectiveness when needing to change filter bag 2 and demolishs and repacks, but explosion-proof ceramic heating pipe 1 repeatedly usable.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (8)
1. The utility model provides a device that dry process dust removal filter bag was dried, includes explosion-proof ceramic heating pipe (1) and installation department, its characterized in that: the anti-explosion ceramic heating pipe (1) is installed at the middle position inside the filter bag (2) through an installation part, the filter bag (2) is arranged inside the dust removal box body (3), a cage rib (4) is arranged above the inside of the dust removal box body (3), a fixing ring (5) is arranged on the cage rib (4), the filter bag (2) is arranged below the fixing ring (5), an opening at the upper end of the filter bag (2) is communicated with the fixing ring (5), and the bottom of the filter bag (2) is a closed end;
the upper end and the lower end of one side of the dust removal box body (3) are respectively communicated with an outlet pipe (6) and an inlet pipe (7), an outlet butterfly valve (8) is arranged on the outlet pipe (6), and an inlet butterfly valve (9) is arranged on the inlet pipe (7).
2. The dry dedusting filter bag drying device according to claim 1, is characterized in that: the installation department includes buckle (10) and link (11), the top in the explosion-proof ceramic heating pipe (1) outside is established in link (11), the outer end in link (11) is connected in buckle (10), the inboard of buckle (10) is equipped with the draw-in groove with retainer plate (5) side wall thickness looks adaptation.
3. The dry dedusting filter bag drying device according to claim 2, wherein: the cage frame (4) separates the upper end and the lower end in the dust removal box body (3) and seals the separation part, and the fixing ring (5) is communicated with the upper end and the lower end in the dust removal box body (3).
4. The dry dedusting filter bag drying device according to claim 3, is characterized in that: the communicated part of the outlet pipe (6) and the dust removal box body (3) is positioned above the opening of the filter bag (2), and the communicated part of the inlet pipe (7) and the dust removal box body (3) is positioned below the closed end of the filter bag (2).
5. The method for drying the dry dedusting filter bag is characterized by comprising the following steps of:
s1: an explosion-proof ceramic heating pipe (1) is additionally arranged and fixed between the cage framework (4) and the filter bag (2), and the explosion-proof ceramic heating pipe (1) heats to transmit heat radiation to the cage framework (4) and the filter bag (2);
s2: controlling the temperature of the inner wall of the filter bag (2) and continuously drying;
s3: along with the temperature rise, the moisture attached to the filter bag (2) is continuously vaporized;
s4: controlling the opening of an inlet butterfly valve (9) and an outlet butterfly valve (8), wherein the coal gas flowing in the dust removal box body (3) enters from the inlet butterfly valve (9), carries vaporized water through the filter bag (2), and flows to a clean coal gas main pipe through the outlet butterfly valve (8);
s5: after dust attached to the filter bag (2) is completely dried, the filter bag (2) is blown and sprayed through a back blowing system of the dust removal box body (3) to blow off the dust;
s6: and after the filtering area of the filter bag (2) and the pressure difference of the filter bag (2) are recovered, the inlet butterfly valve (9) and the outlet butterfly valve (8) are completely opened and put into use.
6. The method for drying the filter bag for dry dedusting according to claim 5, characterized in that: in the S2, the temperature of the inner wall of the filter bag (2) is controlled to be 150-200 ℃.
7. The method of claim 5, wherein the drying step comprises the following steps: and in the S4, the opening degrees of the inlet butterfly valve (9) and the outlet butterfly valve (8) are controlled to be closed by 90-95%.
8. The method of claim 5, wherein the drying step comprises the following steps: in the S4, the vaporized water carried by the coal gas flows to the clean gas main pipe through the outlet butterfly valve (8) and is separated out in the clean gas main pipe condensed water drainer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210797235.2A CN115253511A (en) | 2022-07-08 | 2022-07-08 | Device and method for drying dry dedusting filter bag |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210797235.2A CN115253511A (en) | 2022-07-08 | 2022-07-08 | Device and method for drying dry dedusting filter bag |
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| Publication Number | Publication Date |
|---|---|
| CN115253511A true CN115253511A (en) | 2022-11-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210797235.2A Pending CN115253511A (en) | 2022-07-08 | 2022-07-08 | Device and method for drying dry dedusting filter bag |
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| CN (1) | CN115253511A (en) |
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| 刘学军;: "高浓度布袋除尘器在内回流循环流化床烟气脱硫系统上的应用", 热力发电, no. 12, pages 53 - 55 * |
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