CN106731636A - A kind of boiler flue gas desulfurization system - Google Patents
A kind of boiler flue gas desulfurization system Download PDFInfo
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- CN106731636A CN106731636A CN201710071656.6A CN201710071656A CN106731636A CN 106731636 A CN106731636 A CN 106731636A CN 201710071656 A CN201710071656 A CN 201710071656A CN 106731636 A CN106731636 A CN 106731636A
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- desulfurization
- tower
- flue gas
- king
- lime
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/80—Semi-solid phase processes, i.e. by using slurries
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/20—Halogens or halogen compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Treating Waste Gases (AREA)
Abstract
The present invention discloses a kind of boiler flue gas desulfurization system, belong to flue gas desulfurization environmental protection technical field, including the desulfurizing tower being sequentially connected, air-introduced machine and chimney, desulfurizing tower is made up of desulfurization king-tower and desulfurization secondary tower, the top of desulfurization king-tower is connected with the top of the desulfurization secondary tower, the desulfurization king-tower bottom is provided with flue gas inlet pipe, the bottom of the desulfurization secondary tower is provided with flue gas outlet pipe, the flue gas outlet pipe is connected with the air-introduced machine, the desulfurization king-tower bottom is provided with moisture film processor, the moisture film processor is arranged on the top of the flue gas inlet pipe, the desulfurization king-tower bottom is provided with grey ditch, the grey ditch is communicated with sedimentation basin, the supernatant of the sedimentation basin is driven into moisture film processor by clarified water pump, the desulfurization king-tower top is provided with multistage lime slurry shower, dehydrator is provided with the desulfurization secondary tower.Boiler flue gas desulfurization system in the present invention can effectively remove SO3, the pernicious gas such as chloride and fluoride, removal efficiency is up to more than 95%.
Description
Technical field
The present invention relates to flue gas desulfurization environmental protection technical field, more particularly to a kind of boiler flue gas desulfurization system.
Background technology
Within one considerably long period of current and expected future, the energy resource structure of China is the discharged from coal-fired boiler based on coal
Flue gas contain substantial amounts of SO2, the pollution to environment causes huge injury.
SO2Discharge capacity increases severely makes most cities SO2Concentration is in level of pollution higher.SO2The increase of discharge capacity, makes
The acid rain of China increases abnormal rapid, serious acid precipitation and the ecosystem of fragility makes China's economic loss serious, only acid
Rain pollutes the direct economic loss caused to forest and crops up to hundreds of hundred million yuan.If do not controlled strictly, China SO2Discharge
Amount will continue to increase, SO2With Acid Rain Pollution by serious harm residents ' health, corrode construction material, destroy the ecosystem, cause huge
Big economic loss.According to statistics, Chinese SO2The SO that annual emissions have been produced more than ten thousand tons of 1600-1800, fire coal2Account for the overwhelming majority,
The wherein SO of coal-fired plant boiler discharge2Account for the 1/4 of total release, the SO of middle and small burn coal boiler discharge2Account for total release
Nearly 40%.The atmosphere pollution character of China is also due to coal-smoke pollution that is a large amount of coal-fired and being formed, therefore, for coal-burning boiler
For, significantly cut down SO2Pollution is extremely urgent.
Sulfur removal technology at present in the world is a lot, including limestone/lime-gypsum wet processing, magnesium processes sulfur removal technology, sodium
Alkali method desulfurizing technology, Analyss of Desulphurization Technology of Flue Gas Recirculation Fluid-bad, ammonia process technique etc., in these sulfur removal technologies, with lime stone/stone
Ash-gypsum wet technique it is most widely used, market occupancy is more than 80%.
In process for flue gas desulfurization by limestone/lime-gypsum wet technique, mainly there are spray column, liquid column tower and bubble tower at present,
The application on these three absorption towers all compares many, is especially most widely used in spray void tower.But, bubble tower does not apply to sulfur-bearing high
Flue gas, the application of liquid column tower is relatively more, especially sprays void tower and is most widely used.But bubble tower does not apply to sulfur-bearing cigarette high
Gas, liquid column tower is too poor to the regulation performance of load, and spray column is mainly the quantity for being continuously increased spraying layer using strategy, so that
It is continuously increased the height on absorption tower, it is ensured that desulfuration efficiency, corresponding construction costs will necessarily be increased.
The content of the invention
The invention provides a kind of boiler flue gas desulfurization system, existing spray column is solved due to being continuously increased the number of spraying layer
Amount, the problem of height so as to be continuously increased absorption tower.
In order to solve the above technical problems, the technical proposal of the invention is realized in this way：
A kind of boiler flue gas desulfurization system, including desulfurizing tower, air-introduced machine and the chimney being sequentially connected, the desulfurizing tower is by taking off
Sulphur king-tower and desulfurization secondary tower are constituted, and the top of the desulfurization king-tower is connected with the top of the desulfurization secondary tower, the desulfurization master
Tower bottom is provided with flue gas inlet pipe, and the bottom of the desulfurization secondary tower is provided with flue gas outlet pipe, the flue gas outlet pipe and the air inducing
Machine is connected, and the desulfurization king-tower bottom is provided with moisture film processor, and the moisture film processor is arranged on the upper of the flue gas inlet pipe
Side, the desulfurization king-tower bottom is provided with grey ditch, and the grey ditch is communicated with sedimentation basin, and the supernatant of the sedimentation basin passes through
Clarified water pump is driven into moisture film processor, and the desulfurization king-tower top is provided with multistage lime slurry shower, the desulfurization secondary tower
Inside it is provided with dehydrator.
Wherein it is preferred to, the sedimentation basin is three-level sedimentation basin, and first baffle is respectively arranged between adjacent sedimentation basin
And second baffle, first plate washer highly be slightly above the second baffle.
Wherein it is preferred to, the multistage lime slurry shower is connected with lime slurry supply system.
Wherein it is preferred to, the lime white supply system includes the lime storage tank, screw conveyor, the lime that are sequentially connected
Newborn reservoir, milk of lime pump and desulphurization circulating pond, are provided between the multistage lime slurry shower and the moisture film processor
Lime slurry catch tray, the lime slurry catch tray is connected by circulation line with the desulphurization circulating pond.
Wherein it is preferred to, the desulphurization circulating pond is connected with gypsum preparation system.
Wherein it is preferred to, the gypsum preparation system includes cyclone and vacuum belt dewaterer, the cyclone and institute
State the connection of desulphurization circulating pond.
Wherein it is preferred to, also including heat-exchange device, the flue gas inlet pipe and the flue gas outlet pipe are handed over the heat respectively
Changing device is connected.
Beneficial effect of the present invention：
Absorption tower of the invention is made up of desulfurization king-tower and desulfurization secondary tower, and lime slurry shower is set in desulfurization king-tower,
Dehydrator is provided with desulfurization secondary tower, is not only extended flue gas and is circulated in absorption tower length, also effectively reduce adsorption tower
Height.Grey ditch under adsorption tower connects with multifeed clarifier, and the water for dedusting of lowering the temperature is recycled reuse, saves energy
Source.
Boiler flue gas desulfurization system in the present invention can effectively remove SO3, the pernicious gas such as chloride and fluoride, take off
Except rate up to more than 95%.And the smoke moisture of discharge is relatively low, thus the equipment such as flue, chimney to reaction tower and downstream
Corrosivity is smaller, can not use smoke re-heater, and preservative treatment can not be carried out to existing chimney, directly uses dry smoke stack emission
Desulfurization fume.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
The accompanying drawing to be used needed for having technology description is briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, without having to pay creative labor, may be used also
Other accompanying drawings are obtained with according to these accompanying drawings.
Fig. 1 is boiler flue gas desulfurization system process chart in the present invention.
In figure, 1. desulfurizing tower, 1-1. desulfurization king-towers, 1-2. desulfurization secondary towers, 2. air-introduced machine, 3. chimney, 4. flue gas inlet pipe, 5.
Flue gas outlet pipe, 6. moisture film processor, 7. multistage lime slurry shower, 8. dehydrator, 9. three-level sedimentation basin, 10. first baffle,
11. second baffles, 12. lime storage tanks, 13. screw conveyors, 14. milk of lime reservoirs, 15. milk of lime pumps, 16. desulphurization circulatings
Pond, 17. cyclones, 18. vacuum belt dewaterers, 19. clarified water pumps
Specific embodiment
The technical scheme in the embodiment of the present invention is clearly and completely described below, it is clear that described embodiment
Only a part of embodiment of the invention, rather than whole embodiments.Based on the embodiment in the present invention, the common skill in this area
The every other embodiment that art personnel are obtained under the premise of creative work is not made, belongs to the model of present invention protection
Enclose.
As shown in figure 1, the present embodiment provides a kind of boiler flue gas desulfurization system, including the desulfurizing tower 1, air inducing being sequentially connected
Machine 2 and chimney 3, the desulfurizing tower 1 are made up of desulfurization king-tower 1-1 and desulfurization secondary tower 1-2, the top of the desulfurization king-tower 1-1 with
It is connected at the top of the desulfurization secondary tower 1-2, the desulfurization king-tower 1-1 bottoms are provided with flue gas inlet pipe 4, the desulfurization secondary tower 1-
2 bottom is provided with flue gas outlet pipe 5, and the flue gas outlet pipe 5 is connected with the air-introduced machine 2, and the desulfurization king-tower 1-1 bottoms are set
There is moisture film processor 6, the moisture film processor 6 is arranged on the top of the flue gas inlet pipe 4, and the desulfurization king-tower 1-1 bottoms set
Grey ditch is equipped with, the grey ditch is communicated with sedimentation basin, and the supernatant of the sedimentation basin is driven at moisture film by clarified water pump 19
Reason device 6, the desulfurization king-tower 1-1 tops are provided with multistage lime slurry shower 7, are provided with the desulfurization secondary tower 1-2 de-
Hydrophone 8.Absorption tower is made up of desulfurization king-tower 1-1 and desulfurization secondary tower 1-2, and lime slurry shower is set in desulfurization king-tower 1-1,
Dehydrator 8 is provided with desulfurization secondary tower 1-2, is not only extended flue gas and is circulated in absorption tower length, also effectively reduce absorption
The height of tower.Grey ditch under adsorption tower connects with multifeed clarifier, and the water for dedusting of lowering the temperature is recycled reuse, saves
The energy.
Wherein, the sedimentation basin is three-level sedimentation basin 9, and first baffle 10 and the are respectively arranged between adjacent sedimentation basin
Two baffle plates 11, first plate washer is highly slightly above the second baffle 11.The setting makes the easy precipitate and separate of buck, can drop significantly
The investment of low Ash Water Separator.Also, the clear water of precipitation is circularly used for moisture film processor 6, save energy.
Wherein, multistage lime slurry shower 7 is connected with lime slurry supply system.In the present invention, according in flue gas
SO2Content can be appropriate the grey slurries shower of increase level level, reach the effect of SO2 in effectively removal flue gas.
Wherein, the lime white supply system includes the lime storage tank 12, the storage of screw conveyor 13, milk of lime that are sequentially connected
Pond 14, milk of lime pump 15 and desulphurization circulating pond 16, set between the multistage lime slurry shower 7 and the moisture film processor 6
Lime slurry catch tray is equipped with, the lime slurry catch tray is connected by circulation line with the desulphurization circulating pond 16.Lime
Slurry collecting disc is used to collect the slurries reacted in absorption tower, then squeezes into desulphurization circulating pond 16, desulphurization circulating pond 16 and stone
Grey breast reservoir 14 is connected, and continually enters fresh milk of lime slurries, the pH value in desulphurization circulating pond 16 is maintained at 10~12.
Wherein, the desulphurization circulating pond 16 is connected with gypsum preparation system.The gypsum preparation system includes cyclone 17
With vacuum belt dewaterer 18, the cyclone 17 is connected with the desulphurization circulating pond 16.CaSO4 in desulphurization circulating pond 16
When reaching saturation, there are CaSO4 solids to separate out in desulphurization circulating pond 16, at this moment, open gypsum gypsum preparation system, be stranded this, this is
The accessory substance of system is gypsum, and obtained gypsum qualitt is high.
The flue-gas temperature of flue gas inlet pipe 4 is higher, is unfavorable for spray-absorption SO2, and the flue-gas temperature of flue gas outlet pipe 5 is relatively low,
Easily make the fouling of chimney 3, corrosion, the drawbacks of in order to improve these two aspects, hot friendship is provided with flue gas inlet pipe 4 and flue gas outlet pipe 5
Changing device, the flue gas inlet pipe 4 and the flue gas outlet pipe 5 are connected with the heat-exchange device respectively.
The system is particularly adapted to the purified treatment of high sulfur-containing smoke gas of the sulfur-bearing more than 3.5%, it is ensured that desulfuration efficiency can
To reach more than 95%.
Presently preferred embodiments of the present invention is the foregoing is only, is not intended to limit the invention, it is all in essence of the invention
Within god and principle, any modification, equivalent substitution and improvements made etc. should be included within the scope of the present invention.
Claims (7)
1. a kind of boiler flue gas desulfurization system, it is characterised in that：It is described including the desulfurizing tower, air-introduced machine and the chimney that are sequentially connected
Desulfurizing tower is made up of desulfurization king-tower and desulfurization secondary tower, and the top of the desulfurization king-tower is connected with the top of the desulfurization secondary tower,
The desulfurization king-tower bottom is provided with flue gas inlet pipe, and the bottom of the desulfurization secondary tower is provided with flue gas outlet pipe, the flue gas outlet pipe
Connected with the air-introduced machine, the desulfurization king-tower bottom is provided with moisture film processor, the moisture film processor is arranged on the cigarette
The top of gas inlet pipe, the desulfurization king-tower bottom is provided with grey ditch, and the grey ditch is communicated with sedimentation basin, the sedimentation basin
Supernatant is driven into moisture film processor by clarified water pump, and the desulfurization king-tower top is provided with multistage lime slurry shower, institute
State in desulfurization secondary tower and be provided with dehydrator.
2. a kind of boiler flue gas desulfurization system according to claim 1, it is characterised in that：The sedimentation basin is precipitated for three-level
Pond, is respectively arranged with first baffle and second baffle between adjacent sedimentation basin, first plate washer is highly slightly above described the
Two baffle plates.
3. a kind of boiler flue gas desulfurization system according to claim 1, it is characterised in that：The multistage lime slurry spray
Pipe is connected with lime slurry supply system.
4. a kind of boiler flue gas desulfurization system according to claim 3, it is characterised in that：The lime white supply system bag
Include lime storage tank, screw conveyor, milk of lime reservoir, milk of lime pump and the desulphurization circulating pond being sequentially connected, the multistage lime
Lime slurry catch tray is provided between slurries shower and the moisture film processor, the lime slurry catch tray is by circulation
Pipeline is connected with the desulphurization circulating pond.
5. a kind of boiler flue gas desulfurization system according to claim 4, it is characterised in that：The desulphurization circulating pond and gypsum
Preparation system is connected.
6. a kind of boiler flue gas desulfurization system according to claim 5, it is characterised in that：The gypsum preparation system includes
Cyclone and vacuum belt dewaterer, the cyclone are connected with the desulphurization circulating pond.
7. according to a kind of boiler flue gas desulfurization system described in claim 5, it is characterised in that：Also include heat-exchange device, it is described
Flue gas inlet pipe and the flue gas outlet pipe are connected with the heat-exchange device respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710071656.6A CN106731636A (en) | 2017-02-09 | 2017-02-09 | A kind of boiler flue gas desulfurization system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710071656.6A CN106731636A (en) | 2017-02-09 | 2017-02-09 | A kind of boiler flue gas desulfurization system |
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| Publication Number | Publication Date |
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| CN106731636A true CN106731636A (en) | 2017-05-31 |
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| CN201710071656.6A Pending CN106731636A (en) | 2017-02-09 | 2017-02-09 | A kind of boiler flue gas desulfurization system |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2577940Y (en) * | 2002-11-06 | 2003-10-08 | 清华同方股份有限公司 | Liquid column jet desulfurizing dust-removing integral devices |
| CN1923339A (en) * | 2006-08-18 | 2007-03-07 | 浙江天蓝脱硫除尘有限公司 | Fume desulfurizing process with enhancement lime method |
| CN101716454A (en) * | 2009-12-17 | 2010-06-02 | 航天环境工程有限公司 | Process for desulphurizing and dedusting catalytic cracking regenerated smoke |
| CN103028318A (en) * | 2012-11-23 | 2013-04-10 | 广东依科电力技术有限公司 | Cyclone plate tower desulfurizing unit and working method thereof |
| CN103768924A (en) * | 2014-02-20 | 2014-05-07 | 北京中能诺泰节能环保技术有限责任公司 | Method and device for further purifying wet desulfurization purified flue gas |
| CN205760566U (en) * | 2016-06-27 | 2016-12-07 | 山东淙汇工业科技有限公司 | Spiral-flow type water film desulfurization device |
-
2017
- 2017-02-09 CN CN201710071656.6A patent/CN106731636A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2577940Y (en) * | 2002-11-06 | 2003-10-08 | 清华同方股份有限公司 | Liquid column jet desulfurizing dust-removing integral devices |
| CN1923339A (en) * | 2006-08-18 | 2007-03-07 | 浙江天蓝脱硫除尘有限公司 | Fume desulfurizing process with enhancement lime method |
| CN101716454A (en) * | 2009-12-17 | 2010-06-02 | 航天环境工程有限公司 | Process for desulphurizing and dedusting catalytic cracking regenerated smoke |
| CN103028318A (en) * | 2012-11-23 | 2013-04-10 | 广东依科电力技术有限公司 | Cyclone plate tower desulfurizing unit and working method thereof |
| CN103768924A (en) * | 2014-02-20 | 2014-05-07 | 北京中能诺泰节能环保技术有限责任公司 | Method and device for further purifying wet desulfurization purified flue gas |
| CN205760566U (en) * | 2016-06-27 | 2016-12-07 | 山东淙汇工业科技有限公司 | Spiral-flow type water film desulfurization device |
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