CN213132299U - Draught fan blade anti-corrosion structure of incinerator tail gas treatment device - Google Patents
Draught fan blade anti-corrosion structure of incinerator tail gas treatment device Download PDFInfo
- Publication number
- CN213132299U CN213132299U CN202021845977.0U CN202021845977U CN213132299U CN 213132299 U CN213132299 U CN 213132299U CN 202021845977 U CN202021845977 U CN 202021845977U CN 213132299 U CN213132299 U CN 213132299U
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- Prior art keywords
- tail gas
- tower
- alkali solution
- pipeline
- communicated
- Prior art date
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Links
- 238000005260 corrosion Methods 0.000 title abstract description 11
- 238000010521 absorption reaction Methods 0.000 claims abstract description 24
- 239000002253 acid Substances 0.000 claims abstract description 22
- 239000003513 alkali Substances 0.000 claims abstract description 21
- 239000007921 spray Substances 0.000 claims abstract description 11
- 230000008676 import Effects 0.000 claims description 6
- 239000004743 Polypropylene Substances 0.000 claims description 4
- 238000005536 corrosion prevention Methods 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- -1 polypropylene Polymers 0.000 claims description 4
- 229920001155 polypropylene Polymers 0.000 claims description 4
- 238000005507 spraying Methods 0.000 claims 1
- 230000007797 corrosion Effects 0.000 abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 8
- 239000000126 substance Substances 0.000 abstract description 4
- 238000011010 flushing procedure Methods 0.000 abstract description 3
- 239000006260 foam Substances 0.000 abstract 3
- 239000007789 gas Substances 0.000 description 40
- 239000007788 liquid Substances 0.000 description 12
- 239000000243 solution Substances 0.000 description 11
- 239000012670 alkaline solution Substances 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 2
- 230000002378 acidificating effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- LSNNMFCWUKXFEE-UHFFFAOYSA-N Sulfurous acid Chemical compound OS(O)=O LSNNMFCWUKXFEE-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 235000012255 calcium oxide Nutrition 0.000 description 1
- 239000000292 calcium oxide Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 238000006056 electrooxidation reaction Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 230000035515 penetration Effects 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
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- Treating Waste Gases (AREA)
Abstract
The utility model relates to an burn burning furnace tail gas processing apparatus, especially a burn burning furnace tail gas processing apparatus's draught fan blade anticorrosion structure. The device comprises an acid removal tower, an absorption tower, an alkali solution pump, a spray pump, a fan, the lower part and a first tail gas pipeline of the acid removal tower are communicated, the upper part of the acid removal tower is communicated with an alkali solution tank through the alkali solution pump and the first alkali solution pipeline, the top of the acid removal tower is communicated with the lower part of the absorption tower through a second tail gas pipeline, the upper part of the absorption tower is communicated with a circulating tank through a spray pump spray and a spray pipeline, the bottoms of the acid removal tower and the absorption tower are communicated with the alkali solution tank and the circulating tank respectively, the top outlet of the absorption tower is communicated with the inlet of a foam remover through a third tail gas pipeline, the upper part and the bottom of the foam remover are communicated with a flushing water pipe and the circulating tank respectively, and the top outlet of the foam remover is communicated with the inlet of the fan through a. The utility model discloses reduce the water content that gets into in the fan tail gas, alleviate the chemical corrosion that acid gas produced, improve the life of draught fan.
Description
Technical Field
The utility model relates to an burn burning furnace tail gas processing apparatus, especially a burn burning furnace tail gas processing apparatus's draught fan blade anticorrosion structure.
Background
At present, tail gas generated by an incinerator is discharged by a draught fan after being treated by a tail gas treatment device, a wet desulphurization process is adopted in the tail gas desulphurization process, and the incinerated tail gas enters a washing tower and then is mixed with alkaline liquid (Ca (OH)2) And (4) contacting, reacting to form sulfate precipitate and separating. In the production process, the phenomenon that the induced draft fan is stopped due to vibration appears for many times in the operation process. The maintenance personnel check that the fan impeller is seriously corroded and more attachments are attached to the surface of the impeller. Due to reasons such as impeller corrosion and attachments on the surface of the impeller, the mass of the rotor is unbalanced, and further, the vibration of a bearing of the fan is caused, so that the fan is damaged. After the incineration tail gas is desulfurized, a certain amount of liquid drops are carried out of the washing tower along with the gas flow, and the liquid drops and the incompletely absorbed SO in the waste gas2The reaction forms acidic substances to corrode an impeller and a flue gas pipeline of the draught fan, the corrosion penetration phenomenon of a metal part occurs after a part of field equipment operates for a period of time, and meanwhile, electrochemical corrosion, crystallization corrosion and erosion corrosion also exist, so that the maintenance cost is improved, and the production efficiency is reduced.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the technical problem and provides a draught fan blade anticorrosion structure of incinerator tail gas treatment device, improves the life of draught fan.
The utility model provides a technical problem that its technical problem adopted is:
the utility model provides an burn burning furnace tail gas processing apparatus's draught fan blade anticorrosion structure, including removing the acid tower, the absorption tower, the alkali solution pump, the spray pump, the fan, the lower part and the first tail gas pipeline intercommunication that remove the acid tower, alkali solution pump and first alkali solution pipeline and alkali solution pond intercommunication are passed through to the upper portion that removes the acid tower, the top that removes the acid tower passes through the lower part intercommunication of second tail gas pipeline and absorption tower, the upper portion of absorption tower is spouted and is sprayed pipeline and circulation tank intercommunication through the spray pump, the bottom of removing acid tower and absorption tower respectively with alkali solution pond and circulation tank intercommunication, the top export of absorption tower passes through the import intercommunication of third tail gas pipeline and demister, the upper portion and the bottom of demister communicate with wash pipe and circulation tank respectively, the top export of demister passes through the import intercommunication of fourth tail gas pipeline and fan.
Adopt above-mentioned technical scheme the utility model discloses compare with prior art, beneficial effect is:
the tail gas firstly passes through the demister before entering the induced draft fan, moisture contained in the tail gas is gathered into larger liquid drops in the demister, when the gravity of the liquid drops exceeds the resultant force of the rising force of gas and the surface tension of the liquid, the liquid drops are separated from the surface of the corrugated plate, the water content entering the tail gas of the induced draft fan is reduced, the chemical corrosion generated by acidic gas is reduced, the service life of the induced draft fan is prolonged, the failure rate is reduced, the maintenance cost is reduced, and the production efficiency is improved.
Further, the utility model discloses an optimization scheme is:
the demister is of a baffle structure.
The material of the demister is polypropylene.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention;
in the figure: an acid removal tower 1; a first tail gas pipeline 2; an alkaline solution pump 3; an alkaline solution tank 4; an alkaline solution line 5; a first return line 6; a second tail gas line 7; an absorption tower 8; a spray pump 9; a spray line 10; a second return line 11; a circulation tank 12; a third tail gas line 13; a demister 14; a flushing water pipe 15; a fourth tail gas line 16; a third return line 17; a fan 18; connecting the line 19.
Detailed Description
The present invention will be further described in detail with reference to the accompanying drawings and examples.
Referring to fig. 1, the embodiment is an induced draft fan blade corrosion prevention structure of an incinerator tail gas treatment device, and the induced draft fan blade corrosion prevention structure is composed of an acid removal tower 1, an absorption tower 8, a demister 14, a fan 18 and the like. The lower part of the deacidification tower 1 is communicated with a first tail gas pipeline 2, tail gas of the incinerator enters the deacidification tower 1 through the first tail gas pipeline 2, the upper part of the deacidification tower 1 is communicated with an alkali solution pool 4 through an alkali solution pump 3 and an alkali solution pipeline 5, and the bottom of the deacidification tower 1 is communicated with the alkali solution pool 4 through a first backflow pipeline 6.
The top of the acid removal tower 1 is communicated with the lower inlet of the absorption tower 8 through a second tail gas pipeline 7, the upper part of the absorption tower 8 is communicated with a circulating pool 12 through a spray pump 9 and a spray pipeline 10, the bottom of the absorption tower 8 is communicated with the circulating pool 12 through a second return pipeline 11, and the circulating pool 12 is communicated with the alkali solution pool 4 through a connecting pipeline 19. The top export of absorption tower 8 passes through the import intercommunication of third tail gas pipeline 13 with demister 14, and demister 14's upper portion and inlet tube 15 intercommunication, and demister 14's bottom is passed through third return line 17 and is linked together with circulation tank 12, and demister 14's top export passes through the import intercommunication of fourth tail gas pipeline 16 with fan 17, and fan 17's export and chimney intercommunication. The acid removing tower 1 and the absorption tower 8 are both sieve plate towers. The demister 14 is of a baffle structure, the baffle packing trays are two layers made of polypropylene, and each layer is communicated with a water inlet pipe 15. The bottom of the demister 14, the absorption tower 8 and the deacidification tower 1 is two meters away from the ground, and the alkali solution tank 4 and the circulating tank 12 are underground tanks. Valves are respectively arranged on the first return pipeline 6, the second return pipeline 11, the flushing water pipe 15, the third return pipeline 17 and the connecting pipeline 19.
A demister 14 is additionally arranged between the absorption tower 8 and the fan 18, the tail gas firstly passes through the demister 14 before entering the fan 18, moisture contained in the tail gas is gathered into larger liquid drops in the demister, when the gravity of the liquid drops exceeds the resultant force of the rising force of the gas and the surface tension of the liquid, the liquid drops are separated from the surface of the corrugated plate, the water content in the tail gas entering the fan 18 is reduced, and the chemical corrosion caused by acid gas is further reduced.
Because the gas contains quicklime particles, sulfate, sulfite particles and other particles, a common metal defoaming net is not suitable to be adopted, and the defoaming net can be blocked after the gas is operated for a period of time, so that the defoaming effect is reduced, the pipeline resistance can be increased, and the negative pressure in the furnace body (rotary kiln) is damaged. The material of the demister 14 is selected in consideration of corrosion resistance, wear resistance, temperature fluctuation resistance or short-time overtemperature resistance. The demister 14 is made of polypropylene materials, can resist tail gas at 80 ℃, is resistant to abrasion and strong acid corrosion, and improves the effective operation time of equipment. The baffle plate type defoaming technology is adopted, the separation efficiency is high, the equipment resistance is reduced, and the allowable air flow speed is high. After passing through the corrugated sheet, the gas was substantially free of mist (demisting efficiency 96%). Thus, the negative pressure state in the vertical furnace (rotary kiln) is ensured while the defogging effect is ensured. The baffle plate of the demister 14 also plays a role in dust removal while defoaming. After a period of operation, the demister 14 needs to be regularly and effectively flushed in order to keep the demisting passage clean, free from increased resistance, free from blockage, and capable of continuous operation. The water with certain pressure is used for backflushing the baffle plate of the demister 14 on site, so that sediments on the baffle plate of the demister 14 are effectively washed clean, and the washing liquid generated by the demister 14 is discharged to the circulating tank 12.
The above description is only a preferred and practical embodiment of the present invention, and not intended to limit the scope of the present invention, and all structural equivalents made by using the contents of the specification and drawings are included in the scope of the present invention.
Claims (3)
1. The utility model provides an burn burning furnace tail gas processing apparatus's draught fan blade anticorrosion structure, including removing the acid tower, the absorption tower, the alkali solution pump, spray the pump, the fan, the lower part and the first tail gas pipeline intercommunication that remove the acid tower, the upper portion that removes the acid tower is passed through alkali solution pump and first alkali solution pipeline and alkali solution pond intercommunication, the top that removes the acid tower is through the lower part intercommunication of second tail gas pipeline and absorption tower, the upper portion of absorption tower is spouted and is sprayed pipeline and circulation pond intercommunication through spraying the pump, the bottom that removes acid tower and absorption tower communicates with alkali solution pond and circulation pond respectively, its characterized in that: the top export of absorption tower passes through the import intercommunication of third tail gas pipeline with the demister, the upper portion and the bottom of demister respectively with wash pipe and circulation tank intercommunication, the top export of demister passes through the import intercommunication of fourth tail gas pipeline with the fan.
2. The induced draft fan blade corrosion prevention structure of the incinerator tail gas treatment device according to claim 1, characterized in that: the demister is of a baffle structure.
3. The induced draft fan blade corrosion prevention structure of the incinerator tail gas treatment device according to claim 1, characterized in that: the material of the demister is polypropylene.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021845977.0U CN213132299U (en) | 2020-08-30 | 2020-08-30 | Draught fan blade anti-corrosion structure of incinerator tail gas treatment device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021845977.0U CN213132299U (en) | 2020-08-30 | 2020-08-30 | Draught fan blade anti-corrosion structure of incinerator tail gas treatment device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213132299U true CN213132299U (en) | 2021-05-07 |
Family
ID=75741793
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021845977.0U Expired - Fee Related CN213132299U (en) | 2020-08-30 | 2020-08-30 | Draught fan blade anti-corrosion structure of incinerator tail gas treatment device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213132299U (en) |
-
2020
- 2020-08-30 CN CN202021845977.0U patent/CN213132299U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210507 |