CN112944910A - Air-channeling-preventing device between drum pumping partition walls of chain grate - Google Patents
Air-channeling-preventing device between drum pumping partition walls of chain grate Download PDFInfo
- Publication number
- CN112944910A CN112944910A CN202110359172.8A CN202110359172A CN112944910A CN 112944910 A CN112944910 A CN 112944910A CN 202110359172 A CN202110359172 A CN 202110359172A CN 112944910 A CN112944910 A CN 112944910A
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- CN
- China
- Prior art keywords
- chain grate
- air
- blast
- drying section
- special
- Prior art date
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- Pending
Links
- 238000005192 partition Methods 0.000 title claims abstract description 27
- 238000005086 pumping Methods 0.000 title abstract description 6
- 238000001035 drying Methods 0.000 claims abstract description 44
- 206010010904 Convulsion Diseases 0.000 claims abstract description 10
- 230000036461 convulsion Effects 0.000 claims abstract description 10
- 238000005507 spraying Methods 0.000 claims abstract description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- 238000000605 extraction Methods 0.000 claims description 11
- 230000005465 channeling Effects 0.000 claims description 5
- 239000003638 chemical reducing agent Substances 0.000 claims description 3
- 230000002265 prevention Effects 0.000 claims description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 17
- 239000003546 flue gas Substances 0.000 abstract description 17
- 238000007664 blowing Methods 0.000 abstract description 12
- 238000000034 method Methods 0.000 abstract description 12
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 abstract description 6
- 239000000779 smoke Substances 0.000 abstract description 6
- 239000008188 pellet Substances 0.000 abstract description 5
- 238000005516 engineering process Methods 0.000 abstract description 3
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 abstract description 2
- 239000000428 dust Substances 0.000 description 7
- 238000007605 air drying Methods 0.000 description 3
- 238000002036 drum drying Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000009795 derivation Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B21/00—Open or uncovered sintering apparatus; Other heat-treatment apparatus of like construction
- F27B21/02—Sintering grates or tables
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D15/00—Handling or treating discharged material; Supports or receiving chambers therefor
- F27D15/02—Cooling
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/008—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases cleaning gases
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Drying Of Solid Materials (AREA)
Abstract
An air-channeling preventing device between drum pumping partition walls of a chain grate belongs to the technical field of pellet production of chain grate machines. The problem of chain grate convulsions drying section to blow by dry section and scurry low-quality wind is solved. Comprises a blast pipeline 1, a special-shaped transverse pipe 2, a nozzle 3 and a spraying layer 4. On the chain grate, on a certain pair of branch pipe pipelines of a lower air box of the air blowing drying section, an upward blowing positive pressure air is introduced to a gap at the bottom of a partition wall between the air blowing drying section and the air draft drying section, and a row of positive pressure nozzles are arranged facing the direction of the air draft drying section. The wind of high sulphide high nitrogen oxide etc. that flees with convulsions drying section offsets, reaches the purpose that prevents the dirty wind of convulsions drying section low-quality to the dry section of blast air leakage. Has the advantages that: the leakage of low-quality flue gas to the blast drying section is reduced, the leakage range of the low-quality flue gas is reduced, and the process flow is shortened. The technology is suitable for links of any process or working procedure needing to isolate smoke with different qualities.
Description
Technical Field
The invention belongs to the technical field of pellet production of a chain grate, and solves the problem that air blows from an air draft drying section to an air blast drying section of the chain grate.
Background
In the production process of the grate-rotary kiln pellets, a forced air drying (UD) section and an air Draft Drying (DD) section are additionally arranged for drying green pellets. And the flue gas in the blast drying (UD) section is directly discharged before the treatment,the method belongs to the unorganized emission, so that the dust content in the tail operation area of the chain grate is high, and the production environment is deteriorated. With the increasing environmental protection requirement, the ultra-low emission of dust becomes the development trend in the future. The dust content of the discharged flue gas in the blast drying (UD) section is high, which does not meet the environmental protection requirement, and the discharged flue gas needs to be guided away from the top of the chain grate and then is intensively discharged after dust removal. The negative pressure generated by the induced draft fan on the charge level of the drum drying (UD) section and the negative pressure formed by the suction drying (DD) section on the charge level are mutually influenced. Production practices show that the negative pressure of the drum dry section (UD) is sometimes larger than that of the suction dry section (DD), and the phenomenon that smoke of the suction dry section (DD) blows into the drum dry section (UD) is caused. In the production process of chain-return-ring ball, the smoke temperature of the pumping-drying (DD) section is high, and NO isx、SOxDioxin and dust contents were the most. In order to prevent low-quality smoke in the pumping section (DD) from leaking to the drum drying section (UD), countercurrent air is blown to the direction of the air draft section (DD) in the drum drying section (UD) between the drum pumping partition walls, and the method is a good method for preventing low-quality air from leaking through the wall.
Disclosure of Invention
The invention aims to provide an anti-wind-channeling device between drum pumping partition walls of a chain grate. The leakage of low-quality flue gas to the blast drying section is reduced, the leakage range of the low-quality flue gas is reduced, the low-quality flue gas is enriched in the exhaust drying section, the centralized treatment is facilitated, and the flue gas purification treatment efficiency is improved.
The application provides a chain grate drum is taken out and is prevented scurrying wind device between partition wall uses on the chain grate, its characterized in that, the chain grate includes dry section of blast air and the dry section of convulsions, set up the partition wall between dry section of blast air and the dry section of convulsions, there is the gap between partition wall bottom and charge level, prevent scurrying the wind device and include that blast pipe, special shape are violently managed and the nozzle, special shape violently manage with blast pipe intercommunication, the nozzle sets up special shape is violently managed on, just the spout of nozzle is towards the dry section of convulsions.
Preferably, the inner diameter of the blast pipe ranges from
Preferably, the horizontal angle of the guide plate welded at the top of the special transverse pipe is 55-65 degrees.
Preferably, the size of the nozzle is 200mm × 50mm, the number of the nozzles is multiple, and the distance between two adjacent nozzles is 50mm to 150 mm.
Preferably, the chain grate comprises a water beam, and the special-shaped transverse tube is fixed on the water beam.
Preferably, the special-shaped transverse tube and the blast pipeline have the same diameter.
Preferably, a reducer pipe is arranged between the special-shaped transverse pipe and the blast pipeline.
Preferably, the chain grate comprises a water beam, and the special-shaped transverse pipe is arranged on one side of the blast drying section of the water beam.
Preferably, the number of the nozzles is multiple, and the nozzles are distributed along the axial direction of the special-shaped transverse tube.
Preferably, the nozzle airflow is directed towards the updraft drying section.
Preferably, the contoured cross tube and the nozzle are coated with a spray coating.
The technology is also suitable for other kiln production lines with partition walls, such as a belt type roasting machine and the like. The leakage of the low-quality wind direction air blowing drying section of the air draft drying section can be effectively prevented, and the flue gas of the air blowing drying section does not need to be desulfurized and denitrated and the like.
Has the advantages that: the flue gas of the air draft drying section contains more sulfur, nitrogen and harmful substances, and when the negative pressure of the air blast drying section is greater than that of the air draft drying section, the low-quality flue gas in the air draft drying section leaks to the air blast drying section. After the device is additionally arranged, the flue gas in the blast drying section only needs to remove dust, and does not need to be desulfurized and denitrified and remove other harmful substances, thereby simplifying the treatment process of the flue gas.
Drawings
Fig. 1 is a detailed sectional view of an air blow-by preventing device between extraction partitions of a chain grate drum according to the present application;
fig. 2 is a schematic view of an installation position of the wind channeling prevention device of fig. 1;
fig. 3 is a schematic view illustrating the installation of the blow-by preventing device in fig. 1.
Description of the drawings: the wind channeling prevention apparatus and the installation relationship thereof are indicated by thick lines in the drawings.
Detailed Description
Taking a 1.2Mt/a chain-return-ring process oxidized pellet production line as an example, the following is explained by combining the attached drawings:
as shown in fig. 1-3, a certain pair of windboxes on the grate, below the forced air drying section
The branch pipeline is provided with an opening, and the inner diameter of the blast pipeline 1 is within the range of
Preferably, the inner diameter of the blast pipe 1 is
Welding of
The blast pipeline 1 comprises two sections, one section on the left and one section on the right. A positive pressure wind is led out,
the upper part of the blast pipeline 1 is connected with two ends of a special-shaped transverse pipe 2. The lower part of the special-shaped transverse pipe 2 is provided with a row of nozzles 3. The special-shaped transverse pipe 2 is arranged on a water beam of the partition wall and is positioned at one side of the blowing and drying section. The nozzle 3 extends out and sprays air to the direction of the air draft drying section along the gap. The wind in the kiln cavity of the air draft drying section contains harmful elements such as sulfide, nitrogen oxide and the like. The positive pressure air blown out from the nozzle 3 prevents the low-quality air of the air-blowing drying section from passing through the material surface gap at the bottom of the partition wall into the kiln cavity of the air-blowing drying section, so as to prevent the smoke of the air-blowing drying section from being polluted.
All the flue gas is high-temperature and corrosive, and the special-shaped transverse pipe 2 and the nozzle 3 which are contacted with the flue gas are coated with the spraying layer 4.
The component comprises: the air blowing device comprises a blowing pipeline 1, a special-shaped transverse pipe 2, a nozzle 3 and a spraying layer 4.
Hot air of the forced air drying section of the chain grate machine is led out from the top cover of the three cold sections of the circular cooler through the forced air drier. By passing
The branch pipes are respectively blown into the air boxes of the blast drying section. The hot-blast derivation of convulsions drying section is preheated the two-stage process from the chain grate, and the top is inserted, sees through behind the charge level and is taken away by main draught fan through the bellows, evacuation after the SOx/NOx control dust removal is handled.
Wherein the special-shaped transverse tube 2 is in a semicircle shape and has an inner diameter of
The top of the special transverse tube 2 is welded with a guide plate, and the horizontal angle of the guide plate welded at the top of the special transverse tube 2 is 55-65 degrees, preferably 61 degrees; the nozzles 3 are welded at the lower part of the special-shaped transverse pipe 2, the size of the nozzles is 200mm multiplied by 50mm, the number of the nozzles 3 is multiple, the multiple nozzles 3 are distributed along the axial direction of the special-shaped transverse pipe 2, and one nozzle 3 is arranged at every 50 mm. The nozzle 3 sprays air to a gap between the partition wall and the charge level and faces the direction of the air draft drying section;
the blast pipeline 1 is provided with a reducing section to connect a special transverse pipe 2; the special-shaped transverse tube 2 is fixed on a water beam of the partition wall.
A reducer pipe is arranged between the special-shaped transverse pipe 2 and the blast pipeline 1 so as to connect the special-shaped transverse pipe 2 and the blast pipeline 1.
The chain grate comprises a water beam, and the special-shaped transverse tube 2 is arranged on one side of the blast drying section of the water beam.
The special-shaped transverse pipe 2 can be welded or fixed on the water beam through a hoop, and can also be integrally manufactured with the water beam in advance.
The special-shaped transverse tube 2 and the spray nozzle 3 are coated with a spray coating 4. The thickness of the spraying layer 4 is determined according to the erosion wear and the flue gas corrosion progress, and the purpose is to prolong the service life of the special-shaped transverse pipe 2 and the nozzle 3.
The deflector is part of a shaped cross tube 2.
The top guide plate of the special transverse pipe 2 has the function of reducing the pressure loss of airflow, so that the airflow is less in whirling turbulence and flows smoothly.
The anti-blow-by device operates synchronously with the chain-loop system.
The pressure and temperature of the air are synchronous with the dry air blowing, and no additional adjustment is needed.
The width, length, number and spacing of the nozzles 3 are determined according to the situation, and the air flow is uniformly distributed in principle until the best sealing effect is achieved. Typically between 50mm and 150 mm.
The technology is suitable for links of any process or working procedure needing to isolate smoke with different qualities.
The same or similar arrangements of the basic process principles are within the scope of this patent.
Claims (11)
1. The utility model provides a drying grate drum is taken out and is prevented scurrying wind device between partition wall, uses on the drying grate, a serial communication port, the drying grate includes dry section of blast air and the dry section of convulsions, set up the partition wall between dry section of blast air and the dry section of convulsions, there is the gap between partition wall bottom and charge level, prevent scurrying the wind device and include that blast pipe (1), special shape violently manage (2) and nozzle (3), special shape violently manage (2) with blast pipe (1) intercommunication, nozzle (3) set up special shape violently manages on (2), just the spout of nozzle (3) is towards the dry section of convulsions.
2. The inter-grate drum baffle wall blow-by preventing device of claim 1, wherein the inner diameter of the blast duct (1) ranges from
3. The anti-blowby device between the extraction partitions of the chain grate drum as set forth in claim 1, characterized in that the horizontal angle of the deflector welded on the top of the special-shaped horizontal tube (2) is 55 ° to 65 °.
4. The anti-blowby device between the extraction partitions of the chain grate drum as set forth in claim 1, wherein the size of said nozzles (3) is 200mm x 50mm, the number of said nozzles (3) is plural, and the interval between two adjacent nozzles (3) of said plural nozzles (3) is 50mm to 150 mm.
5. The device for preventing wind channeling between extraction partitions of a chain grate drum according to claim 1, characterized in that the chain grate includes water beams to which the shaped cross tubes (2) are fixed.
6. The anti-blowby device between the extraction partitions of the chain grate drum as set forth in claim 1, characterized in that the special-shaped horizontal tube (2) has the same diameter as the blast pipe (1).
7. The anti-blowby device between the extraction partitions of the chain grate drum as set forth in claim 1, characterized in that a reducer pipe is provided between the special-shaped horizontal pipe (2) and the blast duct (1).
8. The device for preventing wind channeling between the extraction partitions of the chain grate in accordance with claim 1, wherein the chain grate comprises a water beam, and the shaped cross tube (2) is disposed at a side of the blast drying section of the water beam.
9. The anti-blow-by device between the extraction partitions of the chain grate drum as claimed in claim 1, characterized in that the number of the nozzles (3) is multiple, and the multiple nozzles (3) are axially distributed along the special-shaped transverse pipe (2).
10. A grate drum extraction partition space air blow-by prevention device according to claim 1, characterized in that the nozzles (3) are directed towards the extraction drying section.
11. The anti-wind channeling device between the extraction partitions of the chain grate drum as claimed in claim 1, wherein the special-shaped cross tube (2) and the nozzle (3) are coated with a spray coating (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110359172.8A CN112944910A (en) | 2021-04-02 | 2021-04-02 | Air-channeling-preventing device between drum pumping partition walls of chain grate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110359172.8A CN112944910A (en) | 2021-04-02 | 2021-04-02 | Air-channeling-preventing device between drum pumping partition walls of chain grate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112944910A true CN112944910A (en) | 2021-06-11 |
Family
ID=76232172
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110359172.8A Pending CN112944910A (en) | 2021-04-02 | 2021-04-02 | Air-channeling-preventing device between drum pumping partition walls of chain grate |
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| CN (1) | CN112944910A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103335522A (en) * | 2013-07-31 | 2013-10-02 | 中冶北方（大连）工程技术有限公司 | Grate forced air drying section hot air system |
| CN111588554A (en) * | 2020-07-22 | 2020-08-28 | 江西江铃汽车集团改装车股份有限公司 | Positive and negative pressure ambulance |
| CN211503069U (en) * | 2019-12-27 | 2020-09-15 | 北京环都拓普空调有限公司 | Suspension type fresh air purification and ventilation device with fresh air bypass function |
| US20200347091A1 (en) * | 2017-11-02 | 2020-11-05 | Chia Tai Tianqing Pharmaceutical Group Co., Ltd. | Method for preparing cholic acid compound |
| CN215572142U (en) * | 2021-04-02 | 2022-01-18 | 北京首钢国际工程技术有限公司 | Air-channeling-preventing device between drum pumping partition walls of chain grate |
-
2021
- 2021-04-02 CN CN202110359172.8A patent/CN112944910A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103335522A (en) * | 2013-07-31 | 2013-10-02 | 中冶北方（大连）工程技术有限公司 | Grate forced air drying section hot air system |
| US20200347091A1 (en) * | 2017-11-02 | 2020-11-05 | Chia Tai Tianqing Pharmaceutical Group Co., Ltd. | Method for preparing cholic acid compound |
| CN211503069U (en) * | 2019-12-27 | 2020-09-15 | 北京环都拓普空调有限公司 | Suspension type fresh air purification and ventilation device with fresh air bypass function |
| CN111588554A (en) * | 2020-07-22 | 2020-08-28 | 江西江铃汽车集团改装车股份有限公司 | Positive and negative pressure ambulance |
| CN215572142U (en) * | 2021-04-02 | 2022-01-18 | 北京首钢国际工程技术有限公司 | Air-channeling-preventing device between drum pumping partition walls of chain grate |
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