CN215463267U - Gypsum wet flue gas desulfurization system - Google Patents
Gypsum wet flue gas desulfurization system Download PDFInfo
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- CN215463267U CN215463267U CN202121076697.2U CN202121076697U CN215463267U CN 215463267 U CN215463267 U CN 215463267U CN 202121076697 U CN202121076697 U CN 202121076697U CN 215463267 U CN215463267 U CN 215463267U
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- communicated
- pipeline
- absorption tower
- slurry
- flue gas
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- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 38
- 230000023556 desulfurization Effects 0.000 title claims abstract description 38
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 31
- 239000003546 flue gas Substances 0.000 title claims abstract description 31
- 239000010440 gypsum Substances 0.000 title claims abstract description 23
- 229910052602 gypsum Inorganic materials 0.000 title claims abstract description 23
- 239000002002 slurry Substances 0.000 claims abstract description 45
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims abstract description 44
- 235000011941 Tilia x europaea Nutrition 0.000 claims abstract description 44
- 239000004571 lime Substances 0.000 claims abstract description 44
- 238000010521 absorption reaction Methods 0.000 claims abstract description 35
- 239000008267 milk Substances 0.000 claims abstract description 26
- 210000004080 milk Anatomy 0.000 claims abstract description 26
- 235000013336 milk Nutrition 0.000 claims abstract description 26
- 238000009826 distribution Methods 0.000 claims abstract description 16
- 238000005507 spraying Methods 0.000 claims abstract description 13
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 11
- 230000003647 oxidation Effects 0.000 claims abstract description 10
- 239000000779 smoke Substances 0.000 claims abstract description 6
- 239000000843 powder Substances 0.000 claims description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 17
- 238000012216 screening Methods 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 12
- 230000008569 process Effects 0.000 claims description 12
- 238000011084 recovery Methods 0.000 claims description 7
- 238000002360 preparation method Methods 0.000 claims description 6
- 230000001502 supplementing effect Effects 0.000 claims description 4
- 238000005243 fluidization Methods 0.000 claims description 2
- 238000010298 pulverizing process Methods 0.000 claims 1
- 235000019738 Limestone Nutrition 0.000 description 7
- 239000006028 limestone Substances 0.000 description 7
- 230000002745 absorbent Effects 0.000 description 5
- 239000002250 absorbent Substances 0.000 description 5
- 239000003795 chemical substances by application Substances 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 238000000227 grinding Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 239000002893 slag Substances 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000004537 pulping Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 1
- 238000003916 acid precipitation Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 230000003009 desulfurizing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- Treating Waste Gases (AREA)
Abstract
The utility model provides a gypsum wet flue gas desulfurization system, which comprises: the absorption tower is internally provided with a demister, a spraying layer and a slurry tank from top to bottom in sequence; the spraying layer comprises a slurry distribution pipeline and a plurality of nozzles arranged on the slurry distribution pipeline; the lime milk pool is communicated with the inlet of the slurry distribution pipeline through a pipeline and a lime milk pump; the discharge flue is communicated with the top of the absorption tower; the smoke inlet pipeline is communicated with the absorption tower and is arranged below the spraying layer; a heater is arranged between the absorption tower and the smoke discharge flue; the oxidation fan is communicated with the slurry tank; and a second stirrer is erected above the inlet of the oxidation fan of the absorption tower. The wet flue gas desulfurization system has high desulfurization efficiency and good stability.
Description
Technical Field
The utility model belongs to the technical field of desulfurization, and relates to a gypsum wet flue gas desulfurization system.
Background
Reduction of bound SO2The emission and pollution of the desulfurization agent are improved, the environment and the air quality are improved, and the desulfurization agent is the basic guarantee for the sustainable development of the social economy and the health of the citizens in China, so that the desulfurization subject is an important environmental protection project in nearly decades in China. To flue gas after coal combustionThe desulfurization is carried out, SO that SO can be effectively reduced2The discharge of the air purifier reduces the formation of acid rain, ensures the air quality, and creates a good environment for the work and the life of people, which is an engineering with important social significance. The efficiency of flue gas desulfurization is affected by many factors, including flue gas flow rate, SO2 concentration, liquid-to-gas ratio, slurry PH, flue gas temperature, and by the stability of the desulfurization system.
The wet flue gas desulfurization technology is commonly used for boiler flue gas desulfurization of large-scale coal-fired thermal power plants, the wet flue gas desulfurization technology is positioned behind a dust removal system of a combustion boiler, the whole desulfurization process is carried out in solution, the used desulfurizing agent and desulfurization products are in a wet state, the temperature in desulfurization is low, and the flue gas can be discharged from a chimney after being heated. The existing wet flue gas desulfurization system has the disadvantages of low desulfurization efficiency, single desulfurization process flow and poor stability and adjustment effect.
Therefore, the utility model provides a gypsum wet flue gas desulfurization system.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems, the utility model provides a gypsum wet flue gas desulfurization system.
A gypsum wet flue gas desulfurization system comprising:
the absorption tower is internally provided with a demister, a spraying layer and a slurry tank from top to bottom in sequence; the spraying layer comprises a slurry distribution pipeline and a plurality of nozzles arranged on the slurry distribution pipeline;
the lime milk pool is communicated with the inlet of the slurry distribution pipeline through a pipeline and a lime milk pump;
the discharge flue is communicated with the top of the absorption tower;
the smoke inlet pipeline is communicated with the absorption tower and is arranged below the spraying layer; a heater is arranged between the absorption tower and the smoke discharge flue;
the oxidation fan is communicated with the slurry tank; and a second stirrer is erected above the inlet of the oxidation fan of the absorption tower.
Preferably, the device also comprises a powder making device; the powder preparation device comprises a crusher, a screening machine, a dryer, a pulverizer and a lime powder tank; the outlet of the crusher is communicated with the inlet of the screening machine through a pipeline, and the outlet of the screening machine is communicated with the dryer; the screening machine is communicated with a process water system; the dryer is communicated with the pulverizer, and the pulverizer is communicated with the lime powder tank through a pipeline; the lime powder tank is communicated with the lime milk tank through a screw feeder.
Preferably, a first stirrer is erected above the lime milk pool, the bottom of the lime milk pool is communicated with a slag discharge pump through a pipeline, and the top of the lime milk pool is communicated with the process water system.
Preferably, the device also comprises a recovery device; the recovery device comprises a hydrocyclone; the bottom of the absorption tower is communicated with the inlet of the hydrocyclone through a pipeline and a gypsum slurry pump, and the outlet of the hydrocyclone is communicated with a vacuum belt dehydrator through a pipeline; the drain pipes of the hydraulic cyclone and the vacuum belt dehydrator are communicated with the bottom of the absorption tower through a pipeline and a water return pump.
Preferably, a slurry supplement pump is also included; and the inlet and the outlet of the slurry supplementing pump are respectively communicated with the slurry pool and the slurry distribution pipeline through pipelines.
Preferably, a vulcanizing fan and a fluidization plate are erected at the bottom of the lime powder tank.
Preferably, also include the chimney; the discharge flue is communicated with the chimney through a pipeline and a draught fan.
Preferably, a buffer pool is further included; the inlet of the buffer tank is communicated with the bottom of the absorption tower through a pipeline, and the outlet of the buffer tank is communicated with the bottom of the absorption tower through a pipeline and a buffer pump.
The utility model has the beneficial effects that: the utility model provides a gypsum wet flue gas desulfurization system, which is characterized in that a lime milk pool is combined with a stirrer to adjust the solid content and the pH value of limestone slurry, so that the quality of an absorbent is adjusted, and the desulfurization effect and efficiency are improved; the device concentrates and recovers the gypsum through the recovery device, thereby increasing the utilization rate of resources; the device has formed circulation system through the benefit thick liquid pump, can make full use of lime stone thick liquid, increases its utilization ratio, improves whole desulfurization efficiency.
The utility model is further described with reference to the following figures and examples.
Drawings
FIG. 1 is a control system diagram of a gypsum wet flue gas desulfurization system in an embodiment of the utility model.
Reference numerals: 1. a buffer pool; 2. a buffer pump; 3. a second mixer; 4. an oxidation fan; 5. an absorption tower; 6. a slurry supplement pump; 7. a gypsum slurry pump; 8. a water return pump; 9. a vacuum belt dehydrator; 10. a hydrocyclone; 11. a slag discharge pump; 12. a screw feeder; 13. a lime powder tank; 14. a chimney; 15. an induced draft fan; 16. a first mixer; 17. a lime milk tank; 18. a heater; 19. a lime milk pump.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.
A gypsum wet flue gas desulfurization system is shown in figure 1 and comprises a process water system, a powder preparation device, a pulping device and an absorption tower 5;
the powder preparation device comprises a crusher, a screening machine, a dryer and a lime powder tank 13; the outlet of the crusher is communicated with the inlet of the screening machine through a pipeline, and the outlet of the screening machine is communicated with the dryer; the screening machine is communicated with a process water system; the dryer is communicated with the lime powder tank 13 through a gas tank pulse bag type dust collector; crushing limestone into limestone particles with the diameter less than 50mm by a crusher and a screening machine; then grinding the lime powder by a grinder, and sending the lime powder into a lime powder tank 13 through a pipeline and a vulcanizing fan;
the pulping device comprises a lime milk tank 17; the lime powder tank 13 is communicated with a lime milk pool 17 through a screw feeder 12; a first stirrer 16 is erected above the lime milk pool 17, and the bottom of the lime milk pool is communicated with a slag discharge pump 11 through a pipeline; the lime milk tank 17 is communicated with a process water system through a pipeline;
the top of the absorption tower 5 is communicated with a discharge flue, the upper part is communicated with a lime milk pool 17 through a pipeline and a lime milk pump 19, and the middle part is communicated with a smoke inlet pipeline; specifically, the inside of the absorption tower 5 is provided with a demister, a spraying layer and a slurry tank from top to bottom in sequence; the spraying layer comprises a slurry distribution pipeline and a plurality of nozzles arranged on the slurry distribution pipeline; the slurry tank is communicated with an oxidation fan 4; the absorption tower 5 is provided with a second stirrer 3 above the inlet of the oxidation fan 4; the lime milk pump 19 is communicated with the inlet of the slurry distribution pipeline through an absorbent preparation system and is communicated with the slurry tank through a pipeline; a heater 18 is arranged between the absorption tower 5 and the discharge flue.
Furthermore, the device also comprises a recovery device for the secondary utilization of resources; the recovery unit comprises a hydrocyclone 10; the bottom of the absorption tower 5 is communicated with the inlet of a hydrocyclone 10 through a pipeline and a gypsum slurry pump 7, and the outlet of the hydrocyclone 10 is communicated with a vacuum belt dehydrator 9 through a pipeline; the water discharge pipes of the hydraulic cyclone 10 and the vacuum belt dehydrator 9 are communicated with the bottom of the absorption tower 5 through a pipeline and a water return pump 8.
Preferably, a circulating slurry supplementing system is further arranged, and an inlet and an outlet of the slurry supplementing pump 6 are respectively communicated with the slurry pool and the slurry distribution pipeline through pipelines; the discharge flue is communicated with a chimney 14 through a pipeline and a draught fan 15.
Further, the device also comprises a buffer pool 1; the inlet of the buffer pool 1 is communicated with the bottom of the absorption tower 5 through a pipeline, and the outlet of the buffer pool is communicated with the bottom of the absorption tower 5 through a pipeline and a buffer pump 2 for adjusting the internal reaction.
In the present embodiment, the first and second electrodes are,
firstly, crushing limestone into particles by a crusher, filtering the limestone particles with the diameter larger than 50mm by using a screening machine, introducing process water by using a process water system, washing the screened limestone, removing most of fluoride, soluble chloride and some water-soluble impurities by washing the process water, drying by using a dryer, grinding by using a grinding mill, and sending lime powder into a lime powder tank 13 by using a pipeline and a vulcanizing fan;
feeding lime powder into a lime milk pool 17 through a screw feeder 12, injecting water to adjust the density to reach the standard of 1230 kg per cubic meter, namely, the solid content is 30%, then feeding the slurry into a slurry pool of an absorption tower 5, preparing the slurry into an absorbent meeting the standard through an absorbent preparation system, feeding the absorbent into a spraying layer, spraying fog drops through nozzles on a slurry distribution pipeline, and reacting with flue gas entering a flue gas inlet pipeline;
oxygen required by the reaction is provided by an oxidation fan 4, and the gas is scattered by a second stirrer 3, so that the calcium sulfate oxidation reaction is facilitated; the desulfurized flue gas is passed through a demister to remove residual slurry fog drops, and then is discharged to the atmosphere through a flue, a baffle and a chimney 14 in sequence.
The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. A gypsum wet flue gas desulfurization system, comprising:
the absorption tower (5), wherein a demister, a spraying layer and a slurry pool are sequentially erected in the absorption tower (5) from top to bottom; the spraying layer comprises a slurry distribution pipeline and a plurality of nozzles arranged on the slurry distribution pipeline;
a lime milk tank (17) communicated with the inlet of the slurry distribution pipeline through a pipeline and a lime milk pump (19);
the discharge flue is communicated with the top of the absorption tower (5);
the smoke inlet pipeline is communicated with the absorption tower (5) and is arranged below the spraying layer; a heater (18) is arranged between the absorption tower (5) and the discharge flue;
the oxidation fan (4) is communicated with the slurry tank; and a second stirrer (3) is erected above the inlet of the oxidation fan (4) in the absorption tower (5).
2. The gypsum wet flue gas desulfurization system of claim 1, further comprising a pulverizing device; the powder preparation device comprises a crusher, a screening machine, a dryer, a pulverizer and a lime powder tank (13); the outlet of the crusher is communicated with the inlet of the screening machine through a pipeline, and the outlet of the screening machine is communicated with the dryer; the screening machine is communicated with a process water system; the dryer is communicated with the pulverizer, and the pulverizer is communicated with the lime powder tank (13) through a pipeline; the lime powder tank (13) is communicated with the lime milk pool (17) through a screw feeder (12).
3. The gypsum wet flue gas desulfurization system of claim 2, wherein a first stirrer (16) is erected above the lime milk tank (17), the bottom of the lime milk tank is communicated with a deslagging pump (11) through a pipeline, and the top of the lime milk tank is communicated with the process water system.
4. The gypsum wet flue gas desulfurization system of claim 1, further comprising a recovery unit; the recovery device comprises a hydrocyclone (10); the bottom of the absorption tower (5) is communicated with the inlet of the hydrocyclone (10) through a pipeline and a gypsum slurry pump (7), and the outlet of the hydrocyclone (10) is communicated with a vacuum belt dehydrator (9) through a pipeline; the water discharge pipes of the hydraulic cyclone (10) and the vacuum belt dehydrator (9) are communicated with the bottom of the absorption tower (5) through a pipeline and a water return pump (8).
5. The gypsum wet flue gas desulfurization system of claim 4, further comprising a slurry makeup pump (6); and the inlet and the outlet of the slurry supplementing pump (6) are respectively communicated with the slurry pool and the slurry distribution pipeline through pipelines.
6. The gypsum wet flue gas desulfurization system of claim 2, wherein the lime powder tank (13) is erected at its bottom with a vulcanizing blower and a fluidization plate.
7. The gypsum wet flue gas desulfurization system of claim 1, further comprising a chimney (14); the discharge flue is communicated with the chimney (14) through a pipeline and a draught fan (15).
8. The gypsum wet flue gas desulfurization system of claim 1, further comprising a buffer tank (1); the inlet of the buffer pool (1) is communicated with the bottom of the absorption tower (5) through a pipeline, and the outlet of the buffer pool is communicated with the bottom of the absorption tower (5) through a pipeline and a buffer pump (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121076697.2U CN215463267U (en) | 2021-05-19 | 2021-05-19 | Gypsum wet flue gas desulfurization system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121076697.2U CN215463267U (en) | 2021-05-19 | 2021-05-19 | Gypsum wet flue gas desulfurization system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215463267U true CN215463267U (en) | 2022-01-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121076697.2U Expired - Fee Related CN215463267U (en) | 2021-05-19 | 2021-05-19 | Gypsum wet flue gas desulfurization system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215463267U (en) |
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2021
- 2021-05-19 CN CN202121076697.2U patent/CN215463267U/en not_active Expired - Fee Related
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Granted publication date: 20220111 |