CN208742284U - A kind of single column washing Wet fume sweetening dust remover of no stock tank secondary cycle - Google Patents
A kind of single column washing Wet fume sweetening dust remover of no stock tank secondary cycle Download PDFInfo
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- CN208742284U CN208742284U CN201820733516.0U CN201820733516U CN208742284U CN 208742284 U CN208742284 U CN 208742284U CN 201820733516 U CN201820733516 U CN 201820733516U CN 208742284 U CN208742284 U CN 208742284U
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Abstract
A kind of single column of no stock tank secondary cycle washs Wet fume sweetening dust remover, is followed successively by room temperature low PH slurry wash area, low temperature high PH slurry wash area and mist eliminating zone from bottom to top in absorption tower；Room temperature low PH slurry wash area includes stock tank and first order spraying layer, sets circulation pipe and circulating pump between the two；Low temperature high PH slurry wash area includes the slurries collector of bottom and the second level spraying layer on top, and slurries collector connects external collector tube, sets slurries cooler in external collector tube；Collector tube is arranged independently of absorption tower, is connected between slurries collector by diversion pipe, is connect with second level spraying layer by second level circulation pipe, second level circulating pump is set on the circulation pipe of the second level.The utility model eliminates the design of secondary cycle stock tank, slurries are by the direct water conservancy diversion of collector into external collector tube, cooling water and desulfurization slurry use counter-flow arrangement, have many advantages, such as water-saving, heat transfer efficiency is high, anti-corrosion anti-abrasion damage, it is resistance to block, compact-sized occupied area it is small.
Description
Technical field
The utility model relates to pollutant removing technical fields, and in particular to a kind of single column washing of no stock tank secondary cycle
Wet fume sweetening dust remover.
Background technique
" coal-fired electricity is implemented in full about printing and distributing according to Environmental Protection Department, the National Development and Reform Commission, National Energy Board
Factory's minimum discharge and reducing energy consumption programme of work " relevant regulations, arrive the year two thousand twenty, the whole nation it is all has transformation condition fire coal electricity
Factory strives realizing minimum discharge, i.e., under the conditions of benchmark oxygen content 6%, flue dust, sulfur dioxide and discharged nitrous oxides concentration point
It is not high
At the same time, in order to which what is proposed in active response 19 greatly report " adheres to economizing on resources and protecting the basic of environment
State basic policy treats ecological environment as treating life；Put forth effort to solve prominent environmental problem, adheres to that the whole people control altogether, source prevents and treats, hold
Continuous to implement prevention and control of air pollution action, win blue sky defended war " basic thought, some areas (Shanghai, Zhejiang, Hebei, Tianjin
Equal areas) part put into effect local policy and required thermal power plant regulation " wet plume " phenomenon." wet plume " phenomenon refers to high temperature
After flue gas enters desulfurizing tower, after desulfurization slurry contact heat-exchanging, slurries heated portion evaporates in absorption tower, flue gas cooling humidification,
Absorbing tower section droplet also can be entrained to chimney breast by flue gas.The saturation wet flue gas for having carried droplet secretly is arranged to go out to chimney
It after mouthful, condenses to the cold, forms visible fine drop, is i.e. formation " wet plume ", especially runtime, " wet plume " are existing in winter
As being particularly acute.Possible in " wet plume " there are also part gypsum slurries, sulfuric acid droplets and soluble salts etc., to local environment and part
Weather can all have an adverse effect, while flue gas has taken away a large amount of vapor in absorption tower, causes the waste of water resource, because
This, comprehensive treatment desulfurization, dedusting and wet plume have been the trends of the times of power environment protection industry.
Utility model content
The utility model proposes a kind of single columns of no stock tank secondary cycle to wash Wet fume sweetening dust remover, comprehensive
The ecological requirements for considering desulfurization, dedusting, the elimination of wet plume pass through the upgrading to desulphurization system and realize desulfurization and dedusting simultaneously
Water-saving integrated target, space needed for reducing transformation, reduces improvement cost, and it is dirty to be suitable for thermal power generation unit flue gas
It contaminates object and removes field.
To realize the above-mentioned technical purpose, the utility model adopts the following technical solution:
A kind of single column washing Wet fume sweetening dust remover of no stock tank secondary cycle, including absorption tower, the absorption
Tower bottom sets smoke inlet, and top is equipped with exhanst gas outlet, it is characterised in that: it is low to be followed successively by room temperature in the absorption tower from bottom to top
PH slurry wash area, low temperature high PH slurry wash area and mist eliminating zone；Room temperature low PH slurry wash area includes the stock tank of bottom
With the first order spraying layer on top, first order circulation pipe is set between the two, first order circulating pump is set on first order circulation pipe, is realized
The level-one of the low PH slurries of room temperature is washed and is recycled；Low temperature high PH slurry wash area include bottom slurries collector and
The second level spraying layer on top, the slurries collector connect external collector tube, set slurries cooler in the external collector tube；
The external collector tube is arranged independently of absorption tower, is connected between slurries collector by diversion pipe, with second level spraying layer
It is connected by second level circulation pipe, second level circulating pump is set on the circulation pipe of the second level.
Wherein, 48~53 DEG C of the washing slurry temperature in the room temperature low PH slurry wash area, PH range are 4.5~5.2.
Further, the washing slurry temperature in the low temperature high PH slurry wash area be 43~48 DEG C, PH range be 5.5~
6.2。
Further, the slurries cooler is metal plate type slurries cooler, is arranged in using vertical mode outer
It sets in collector tube.
Further, slurries interface is arranged in slurries cooler bottom end and top, and upper side panel and lower part side are arranged
Cooling water connector, the high PH slurries of low temperature flow from bottom to top, and cooling water flows from above to below, and are in pure counterflow heat exchange.
Further, the slurries cooler uses resistance to blockage structure, and slurry channels design for straight channel.
Further, the mist eliminating zone sets three layers of ridge demister.
Further, gas distribution grid layer is arranged in the room temperature low PH slurry wash area, is located under the first spraying layer.
Further, the low temperature high PH slurry wash area setting deflector and gas distribution grid layer are located at slurries and collect
Between device and the second spraying layer.
After utility model device is in use, flue gas enters absorption tower from smoke inlet, washed first by the low PH slurries of room temperature
The slurries for washing low ph value in area are pre-washed, and major part SO is removed2, while the environmental benefits of low ph value in gypsum in stock tank
Crystallization.Then flue gas is under the action of gas distribution grid even into the high pH slurry wash of low temperature arrived above slurries collector
Area is reacted with high ph-values slurries, by SO in flue gas2Efficient removal, the slurries after reaction are entered by slurries collector
In external collector tube, recycled by circulating pump；It is provided with slurries cooler in external collector tube, is dropped with external cold source
The temperature of low secondary cycle sprayed slurry, vertical, slurries flow from bottom to top, and cooling water flows from above to below, in pure inverse
Stream heat exchange, cool slurry make flue gas further cool down after entering low temperature high PH slurry wash area, the wet steaming of the saturation carried in flue gas
The decline of vapour amount, most of desulfurization stayed in desulphurization system with water, avoids flue gas and carries a large amount of vapor and enter atmosphere and causes
Water resource waste.Finally, flue gas passes through multi-stage demister, most of particulate matter heel row is removed to chimney.
Compared with traditional desulfurizing fly ash technology, the utility model is had the advantage that
1, comprehensively consider desulfurization, dedusting, water-saving integrated management goal, washed by designing single column classification+without stock tank
Secondary cycle+secondary cycle slurries condensation calcium base wet-process flue gas desulfurization scheme, can synchronize and realize high-efficiency desulfurization, high-effective dust-removing
The water-saving target with desulfurization；
2, using no stock tank secondary cycle scheme, traditional stock tank is replaced with external collector tube, was both reduced needed for transformation
Occupied area, be convenient for flexible arrangement, slurries cooler uses straight channel heat exchanger, has the anti-corrosion structure of resistance to blocking, desulfurization
Slurry channels design for straight channel, and cooling water and desulfurization slurry use counter-flow arrangement, improve the heat exchange efficiency of slurries cooler；
3, using classification washing scheme, room temperature low pH slurry wash area uses low ph value slurry wash on absorption tower, and low temperature is high
PH slurry wash area uses low temperature high ph-values slurry wash, and two-stage scrubbing section controls respectively, and room temperature low PH slurry wash area uses
Low ph value is washed, and the requirement of gypsum crystallization is met, and low temperature high PH slurry wash area is washed using low temperature high ph-values slurries
It washs, meets high-efficiency desulfurization and the water-saving requirement of depth, efficiently solve the problems, such as that gypsum crystallization and high-efficiency desulfurization pH value are unmatched；
4, low temperature high PH slurry wash area uses low temperature high ph-values slurry wash, can strengthen collaboration dedusting, so that by
After the high efficiency demister of absorption tower, concentration of liquid drops is controlled in 20mg/Nm3。
To sum up, the utility model adds two layers of classification washing, by adding in tower on original first grade desulfurizing tower foundation
Absorption tower is carried out physical extent, is room temperature low PH slurry wash area below collector, is low above collector by slurries collector
Warm high PH slurry wash area, room temperature low PH slurry wash area carry out flue gas washing using room temperature low ph value slurries, are conducive to gypsum
Crystallization；Low temperature high PH slurry wash area is washed using low temperature high ph-values slurries, realizes SO2Efficient removal.Second level is washed
It is entered in external collector tube after washing slurries and smoke reaction by collector, is recycled by circulating pump, cancelled
Space occupied needed for the second level washing of stock tank design greatly reduces transformation, is convenient for flexible arrangement.
Detailed description of the invention
By made detailed description in conjunction with the following drawings, above-mentioned and/or other aspects and advantage of the utility model will
It becomes more apparent upon and is easier to understand, these attached drawings are only schematical, are not intended to limit the utility model, in which:
Fig. 1 is the schematic diagram of the utility model single column classification water-saving integral process of washing desulphurization dedusting.
Appended drawing reference: 1- room temperature low PH slurry wash area, 11- stock tank, 12- first order spraying layer, 13- first order circulation
Pipe, 14- first order circulating pump, 2- low temperature high PH slurry wash area, 21- slurries collector, the second level 22- spraying layer, 23- water conservancy diversion
Pipe, the second level 24- circulation pipe, the second level 25- circulating pump, 26- deflector, 3- mist eliminating zone, the external collector tube of 4-, 5- slurries are cooling
Device, 7- smoke inlet, 8- exhanst gas outlet.
Specific embodiment
Hereinafter, the single column wet process of FGD of the band without stock tank secondary cycle of the utility model is described with reference to the accompanying drawings
The embodiment of dust-extraction unit.The embodiment recorded herein is the specific specific embodiment of the utility model, for illustrating this
The design of utility model, be it is explanatory and illustrative, should not be construed as to the utility model embodiment and this be practical new
The limitation of type range.In addition to the embodiment recorded herein, those skilled in the art can also based on the claim of this application book and
For specification disclosure of that using obvious other technical solutions, these technical solutions include using to recording herein
The technical solution for making any obvious substitutions and modifications of embodiment.
The attached drawing of this specification is schematic diagram, aids in illustrating the design of the utility model, it is schematically indicated each section
Shape and its correlation.It note that for the ease of clearly showing the structure of each component of the utility model embodiment, respectively
It is not drawn according to identical ratio between attached drawing.Identical reference marker is for indicating identical part.Below in conjunction with attached drawing
The principles of the present invention and feature are described, example is served only for explaining the utility model, is not intended to limit this
The range of utility model.The utility model is described in further detail combined with specific embodiments below.
Such as Fig. 1, a kind of single column washing Wet fume sweetening dust remover of no stock tank secondary cycle, including absorption tower are inhaled
It receives tower bottom and sets smoke inlet 6, top is equipped with exhanst gas outlet 7, is followed successively by the low PH slurry wash of room temperature from bottom to top in absorption tower
Area 1, low temperature high PH slurry wash area 2 and mist eliminating zone 3；Room temperature low PH slurry wash area 1 includes stock tank 11 and the top of bottom
First order spraying layer 12 sets first order circulation pipe 13 between the two, and first order circulating pump 14 is set on first order circulation pipe 13, realizes
The level-one of the low PH slurries of room temperature is washed and is recycled；Low temperature high PH slurry wash area 2 includes 21 He of slurries collector of bottom
The second level spraying layer 22 on top, slurries collector 21 connect external collector tube 4, set slurries cooler 5 in external collector tube 4；
External collector tube 4 is arranged independently of absorption tower, is connected between slurries collector 21 by diversion pipe 23, with second level spraying layer
22 are connected by second level circulation pipe 24, set second level circulating pump 25 on second level circulation pipe 24.Mist eliminating zone 3 sets three layers of ridge
Demister.
Wherein, 48~53 DEG C of the washing slurry temperature in room temperature low PH slurry wash area 1, PH range are 4.5~5.2.Low temperature
The washing slurry temperature in high PH slurry wash area 2 is 43~48 DEG C, and PH range is 5.5~6.2.Slurries cooler 5 is metal plate
Formula slurries cooler is arranged in external collector tube 4 using vertical mode.5 bottom end of slurries cooler and top setting are starched
Cooling water connector is arranged in liquid interface, upper side panel and lower part side, and the high PH slurries of low temperature flow from bottom to top, cooling water from upper and
Lower flowing is in pure counterflow heat exchange.Slurries cooler 5 uses resistance to blockage structure, and slurry channels design for straight channel.On cooling water side
There are Butterworth Hatch at lower inlet, slurries side utilizes original spray system, flushing when shutting down to cooler, it is ensured that slurries are cooling
Device is run steadily in the long term.
Furthermore, it is possible to which gas distribution grid layer is arranged in room temperature low PH slurry wash area 1, it is located under first order spraying layer 12.
Low temperature high PH slurry wash area 2 is also provided with deflector 26 and/or gas distribution grid layer, is located at slurries collector 21 and the second level sprays
Between layer 22.
The FGD Retrofitting Project of certain 600MW unit, desulfurizer inlet flue gas amount are 1977805Nm3/ h(standard state is wet
Base, actual oxygen), absorption tower entrance flue gas temperature is 50 DEG C, desulfurizer entrance SO2Concentration (standard state butt, 6%O2) be
2000mg/Nm3, it is desirable that pass through exhanst gas outlet SO after transformation2Concentration is lower than 10mg/Nm3(standard state butt, 6%O2), while realizing de-
The water-saving requirement of sulphur.The original desulfurizer of the unit is single column circulation desulfurization tower, configures three layers of spraying layer, is unable to satisfy row up to standard
It puts and new desulfurizer is separately built without extra vacant lot, in conjunction with live item simultaneously because live place is nervous with water-saving requirement
Part is classified the water-saving integral process of washing desulphurization dedusting using single column, 14m is increased on original absorption tower, is added in secondary cycle
The slurries collector 3 of secondary cycle is connected with external collector tube 4, is followed by second level circulating pump 25 by two layers of spraying layer
Ring utilizes.Metal plate type slurries cooler is set in external collector tube 4, wherein slurries interface is arranged in exchanger base and top,
Cooling water connector is arranged in top and lower part side, and slurries flow from bottom to top, and cooling water flows from above to below, and changes in pure adverse current
Heat.Cooler cooling water flow is 3500m3/ h, after subcooler, secondary cycle slurries drop to 45 DEG C from 50 DEG C.Two
Three layers of ridge demister are arranged in grade circulation top, remove to particulate matter.Washing desulphurization dedusting water-saving one is classified using single column
After body chemical industry skill, desulfurizing tower exports SO2Concentration is controlled in 5mg/Nm3Hereinafter, dust concentration control is in 3mg/Nm3Hereinafter, smoke evacuation temperature
45 DEG C of degree carries water 60t/h hereinafter, saving flue gas.
Above said content is only the basic explanation under the utility model design, and those skilled in the art can be appended
Various modifications are made in the scope of the claims, therefore according to any change made by the technical solution of the utility model, it should all
Belong to the protection scope of the utility model.
Claims (9)
1. a kind of single column of no stock tank secondary cycle washs Wet fume sweetening dust remover, including absorption tower, the absorption tower
Bottom is set smoke inlet (6), and top is equipped with exhanst gas outlet (7), it is characterised in that: is followed successively by from bottom to top in the absorption tower often
Warm low PH slurry wash area (1), low temperature high PH slurry wash area (2) and mist eliminating zone (3)；Room temperature low PH slurry wash area
(1) include bottom stock tank (11) and top first order spraying layer (12), set between the two first order circulation pipe (13), first
It is set first order circulating pump (14) on grade circulation pipe (13), realizes that the level-one of the low PH slurries of room temperature is washed and recycled；It is described low
Warm high PH slurry wash area (2) includes the slurries collector (21) of bottom and the second level spraying layer (22) on top, the slurries
Collector (21) connects external collector tube (4), sets slurries cooler (5) in the external collector tube (4)；The external collector tube
(4) it arranges, is connected between slurries collector (21) by diversion pipe (23), with second level spraying layer (22) independently of absorption tower
It is connected by second level circulation pipe (24), sets second level circulating pump (25) on second level circulation pipe (24).
2. a kind of single column of no stock tank secondary cycle according to claim 1 washs Wet fume sweetening dust remover,
Be characterized in that: the washing slurry temperature in room temperature low PH slurry wash area (1) is 48~53 DEG C, and PH range is 4.5~5.2.
3. a kind of single column of no stock tank secondary cycle according to claim 1 washs Wet fume sweetening dust remover,
Be characterized in that: the washing slurry temperature in low temperature high PH slurry wash area (2) is 43~48 DEG C, and PH range is 5.5~6.2.
4. a kind of single column of no stock tank secondary cycle according to claim 1 washs Wet fume sweetening dust remover,
Be characterized in that: the slurries cooler (5) is metal plate type slurries cooler, is arranged in external liquid collecting using vertical mode
It manages in (4).
5. a kind of single column of no stock tank secondary cycle according to claim 1 washs Wet fume sweetening dust remover,
Be characterized in that: slurries interface is arranged in slurries cooler (5) bottom end and top, and cooling water is arranged in upper side panel and lower part side
Interface, the high PH slurries of low temperature flow from bottom to top, and cooling water flows from above to below, and are in pure counterflow heat exchange.
6. a kind of single column of no stock tank secondary cycle according to claim 1 washs Wet fume sweetening dust remover,
Be characterized in that: the slurries cooler (5) uses resistance to blockage structure, and slurry channels design for straight channel.
7. a kind of single column of no stock tank secondary cycle according to claim 1 washs Wet fume sweetening dust remover,
Be characterized in that: the mist eliminating zone (3) sets three layers of ridge demister.
8. a kind of single column of no stock tank secondary cycle according to claim 1 washs Wet fume sweetening dust remover,
Be characterized in that: gas distribution grid layer is arranged in room temperature low PH slurry wash area (1), is located under first order spraying layer (12).
9. a kind of single column washing wet process of FGD of no stock tank secondary cycle described in any one according to claim 1~8
Dust-extraction unit, it is characterised in that: deflector (26) and gas distribution grid layer is arranged in low temperature high PH slurry wash area (2), is located at
Between slurries collector (21) and second level spraying layer (22).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820733516.0U CN208742284U (en) | 2018-05-17 | 2018-05-17 | A kind of single column washing Wet fume sweetening dust remover of no stock tank secondary cycle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820733516.0U CN208742284U (en) | 2018-05-17 | 2018-05-17 | A kind of single column washing Wet fume sweetening dust remover of no stock tank secondary cycle |
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| Publication Number | Publication Date |
|---|---|
| CN208742284U true CN208742284U (en) | 2019-04-16 |
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ID=66053460
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| CN201820733516.0U Active CN208742284U (en) | 2018-05-17 | 2018-05-17 | A kind of single column washing Wet fume sweetening dust remover of no stock tank secondary cycle |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108554157A (en) * | 2018-05-17 | 2018-09-21 | 北京国电龙源环保工程有限公司 | A kind of single column washing Wet fume sweetening dust remover of no stock tank secondary cycle |
| CN110260679A (en) * | 2019-04-18 | 2019-09-20 | 清华大学 | A kind of spray column, exhaust system and boiler system |
| CN111888896A (en) * | 2020-08-06 | 2020-11-06 | 山东国舜建设集团有限公司 | Dust removal device and method for lime-gypsum wet desulfurization tower |
-
2018
- 2018-05-17 CN CN201820733516.0U patent/CN208742284U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108554157A (en) * | 2018-05-17 | 2018-09-21 | 北京国电龙源环保工程有限公司 | A kind of single column washing Wet fume sweetening dust remover of no stock tank secondary cycle |
| CN110260679A (en) * | 2019-04-18 | 2019-09-20 | 清华大学 | A kind of spray column, exhaust system and boiler system |
| CN111888896A (en) * | 2020-08-06 | 2020-11-06 | 山东国舜建设集团有限公司 | Dust removal device and method for lime-gypsum wet desulfurization tower |
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Address after: 100039 room 901, 9 / F, building 1, yard 16, West Fourth Ring Middle Road, Haidian District, Beijing Patentee after: Guoneng Longyuan environmental protection Co.,Ltd. Address before: 100039 room 911, 1 building, 16 West Fourth Ring Road, Haidian District, Beijing. Patentee before: BEIJING GUODIAN LONGYUAN ENVIRONMENTAL ENGINEERING Co.,Ltd. |