CN206621985U - A kind of coal steam-electric plant smoke sulfur dioxide and waste water coprocessing system - Google Patents
A kind of coal steam-electric plant smoke sulfur dioxide and waste water coprocessing system Download PDFInfo
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- CN206621985U CN206621985U CN201720315853.3U CN201720315853U CN206621985U CN 206621985 U CN206621985 U CN 206621985U CN 201720315853 U CN201720315853 U CN 201720315853U CN 206621985 U CN206621985 U CN 206621985U
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Abstract
The utility model discloses a kind of coal steam-electric plant smoke sulfur dioxide and waste water coprocessing system, belong to coal steam-electric plant smoke processing technology field.Deduster is sequentially connected through flue and air-introduced machine, Venturi, first grade absorption tower, cyclone separator, two-level absorption tower, chimney.First grade absorption tower is semi-dry desulphurization tower, and first grade absorption tower side is provided with humidification water inlet and first order absorption agent entrance, and humidification water inlet is connected through pipeline with wastewater collection tank, and first order absorption agent entrance is connected through pipeline with first grade desulfurizing agent feed bin.Two-level absorption tower is wet desulfuration tower, is connected in the middle part of two-level absorption tower through pipeline with two-grade desulfurizing agent slurry tank, and two-level absorption tower bottom connects wastewater collection tank through pipeline.The system uses the sulfur removal technology that is combined of semidry method wet method, solves the problems, such as flue gas desulphurization and discharge of wastewater, simple in construction, reduce energy consumption and operating cost.
Description
Technical field
A kind of coal steam-electric plant smoke sulfur dioxide and waste water coprocessing system are the utility model is related to, belongs to coal steam-electric plant smoke
Processing technology field.
Background technology
At present to the control of sulfur dioxide in coal steam-electric plant smoke, use wet method double tower desulfurization technology more.Come from operational effect
See, although having reached the purpose of ultra-clean discharge, following problem in the process of running also be present：
1) there is operation energy consumption height, complex process in Wet Flue Gas Desulfurization Technique, and it is single that desulfurization adjusts means.
2) a large amount of desulfurization wastewaters are produced in wet desulphurization and power plant's main frame running, desulfurization wastewater processing has difficulty
Greatly, complex process, the problem of operating cost is high, waste water, which can not be discharged effectively, causes desulphurization system slurries to deteriorate, and has a strong impact on and is
System normal operation.
3) sulfur trioxide, hydrogen chloride, the extrusion rate of hydrogen fluoride are relatively low in flue gas.
Utility model content
The purpose of this utility model is, there is provided a kind of coal steam-electric plant smoke sulfur dioxide and waste water coprocessing system.Should
System uses the sulfur removal technology that semidry method-wet method is combined, and solves flue gas desulphurization operating cost height and waste water can not
Emission problem, the system process is simple, energy consumption and operating cost are relatively low.
In order to solve the above technical problems, the utility model adopts the following technical scheme that：
A kind of coal steam-electric plant smoke sulfur dioxide and waste water coprocessing system use double tower two-stage absorption process, including one-level
Absorption tower, Venturi, cyclone separator, deduster, air-introduced machine, two-level absorption tower, wastewater collection tank, first grade desulfurizing agent material
Storehouse, chimney and two-grade desulfurizing agent slurry tank, the deduster is through flue and air-introduced machine, Venturi, first grade absorption tower, whirlwind
Separator, two-level absorption tower, chimney are sequentially connected.After first grade absorption tower is arranged in series in deduster with two-level absorption tower, boiler
The flue gas that air preheater comes out enters deduster dedusting, enters first grade absorption tower desulfurization by air-introduced machine, enters back into two-level absorption tower
Desulfurization, realize two-grade desulfurizing.The first grade absorption tower is semi-dry desulphurization tower, first grade absorption tower side be provided with humidification water inlet and
First order absorption agent entrance.Humidification water inlet is connected through pipeline with wastewater collection tank, and the waste water in wastewater collection tank passes through humidification water
Entrance, which enters inside first grade absorption tower, is used as humidification water, and humidification water contacts with high-temperature flue gas, is steamed humidification water using flue-gas temperature
Hair, realizes wastewater zero discharge.First order absorption agent entrance is connected through pipeline with first grade desulfurizing agent feed bin, and the absorbent in feed bin leads to
First order absorption agent entrance is crossed to enter inside first grade absorption tower.Due to spraying into humidification water in first grade absorption tower so that flue-gas temperature is big
Amplitude reduction, humidity increase so that first grade desulfurizing agent activity further improves, it is easier to absorbs the sulfur dioxide in flue gas, together
When flue gas in sulfur trioxide, hydrogen chloride, hydrogen fluoride also with calcium hydroxide reaction, be fully absorbed.Two-level absorption tower takes off for wet method
Sulphur tower, be connected through pipeline with two-grade desulfurizing agent slurry tank in the middle part of two-level absorption tower, after flue gas enters two-level absorption tower, flue gas and
Slurry reaction in two-level absorption tower, so that sulfur dioxide in flue gas further absorbs.Two-level absorption tower bottom is through pipeline
Wastewater collection tank is connected, the humidification water that first grade absorption tower sprays into is mainly using caused by two-level absorption tower wet desulphurization or power plant
Waste water, realize wastewater zero discharge.The flue gas come from deduster, which flows through speed after Venturi, to be accelerated, and herein with addition
Absorbent mutually mixes, and between particle, severe friction between gas and particle, forms fluid bed.Product in first grade absorption tower
The complete absorbent with unreacted, the solid particle in cyclone separator and deduster etc. falls into ash bucket.
In order to further improve the utilization rate of absorbent, foregoing system is additionally provided with skewed slot, and cyclone separator bottom is through oblique
Groove connects the first order absorption agent entrance of first grade absorption tower.Flue gas after first grade desulfurizing enters cyclone separator and carries out gas-solid point
From, unreacted desulfurizing agent and desulfurization product solid a part from cyclone separator bottom by connecting the skewed slot of first grade absorption tower
Return to first grade absorption tower to be recycled, so as to improve the utilization rate of desulfurizing agent；Another part is discharged in ash bucket.
The humidification water porch of foregoing first grade absorption tower is additionally provided with swivel nozzle, and swivel nozzle sprays into and comes from wastewater collection
As humidification water, humidification water forms spraying increase smoke moisture, reduces cigarette temperature the waste water of tank.Under cryogenic, absorbent is lived
Property improve, be easy to the sour gas in flue gas the hybrid reaction in first grade absorption tower, complete the absorption of sour gas.
Demister is additionally provided between foregoing two-level absorption tower and chimney, the demister is placed at the top of two-level absorption tower,
For flue gas demisting, the flue gas after purification enters chimney by demister by flue.
Foregoing system is additionally provided with vacuum belt machine, and the two-level absorption tower bottom is also by pipeline communication in vacuum belt
Machine.Slurries and smoke reaction in two-level absorption tower, when the concentration of slurry rise in absorption tower, slurries are got into vacuum belt
Machine carries out gypsum dehydration, and two-grade desulfurizing product is post-processed.
Foregoing deduster can be single electrostatic precipitator, or single electrostatic fabric filter, or
The combination of electrostatic precipitator and electrostatic fabric filter.
Absorbent inside foregoing first grade desulfurizing agent feed bin is white lime, the suction inside the two-grade desulfurizing agent slurry tank
Receipts agent is lime stone slurry.Absorbent into first grade absorption tower mixes with the sulfur dioxide in flue gas and reacts generation CaSO3
And CaSO4, complete the absorption of sulfur dioxide；Simultaneously because white lime activity is higher, other sour gas such as three oxygen in flue gas
Change sulphur, hydrogen chloride, hydrogen fluoride also with calcium hydroxide reaction, complete to absorb.After flue gas and absorbent enter two-level absorption tower, cigarette
Sulfur dioxide and lime stone slurry reaction generation gypsum, further absorb the sulfur dioxide in flue gas in gas.
Compared with prior art, it is of the present utility model to be beneficial in that：
1) first grade absorption tower is ensureing sulfur dioxide desulfurization efficiency using the higher calcium hydroxide of activity as desulfurizing agent
Simultaneously, moreover it is possible to ensure the extrusion rate to sulfur trioxide, hydrogen chloride in flue gas, removal efficiency is up to 95%, taken off much larger than single wet method
Sulphur technology；The higher wet desulfurizing process of desulfuration efficiency is set in afterbody simultaneously, it is ensured that whole desulphurization system qualified discharge.
2) system architecture and technological process are fairly simple, and the sulfur removal technology being combined using semidry method-wet method is reduced
The energy consumption of the double tower circulation wet desulfurizing process generally used, saves operating cost.
3) system has not only reached the purpose of control sulfur dioxide (SO2) emissions, and first grade absorption tower humidification water uses two level in addition
Waste water caused by absorption tower desulfurization or power plant's main frame, reduces desulphurization system water consume, and also waste water caused by power plant is carried out again
Utilize, realize wastewater zero discharge.
4) setting of first grade absorption tower swivel nozzle is avoided using fouling, clogging caused by plain nozzle.
5) first grade absorption tower product is CaSO3、CaSO4The absorbent calcium hydroxide complete with unreacted, it is suitable as abandoned mine well and returns
Fill out, road basis etc.；Two-level absorption tower product is gypsum, i.e. accessory substance caused by the system is in dry powdered form, realizes waste water
Zero-emission.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model.
The implication of reference：1- first grade absorption towers, 2- Venturis, 3- swivel nozzles, 4- cyclone separators, 5- are removed
Dirt device, 6- air-introduced machines, 7- two-level absorption towers, 8- wastewater collection tanks, 9- first grade desulfurizing agent feed bins, 10- boiler air preheaters, 11- cigarettes
Chimney, 12- skewed slots, 13- demisters, 14- vacuum belt machines, 15- humidification water inlets, 16- first order absorption agent entrances, 17- two levels take off
Sulphur agent slurry tank.
The utility model is further described with reference to the accompanying drawings and detailed description.
Embodiment
Embodiment 1 of the present utility model：As shown in figure 1, this kind of SO 2 from fume and waste water coprocessing system include
First grade absorption tower 1, Venturi 2, cyclone separator 4, deduster 5, air-introduced machine 6, two-level absorption tower 7, wastewater collection tank 8,
First grade desulfurizing agent feed bin 9, chimney 11 and two-grade desulfurizing agent slurry tank 17, deduster 5 is through flue and air-introduced machine 6, Venturi
2nd, first grade absorption tower 1, cyclone separator 4, two-level absorption tower 7, chimney 11 are sequentially connected.First grade absorption tower 1 is semi-dry desulphurization
Tower, the side of first grade absorption tower 1 are provided with humidification water inlet 15 and first order absorption agent entrance 16, and humidification water inlet 15 is through pipeline and waste water
Collecting tank 8 is connected, and first order absorption agent entrance 16 is connected through pipeline with first grade desulfurizing agent feed bin 9.The humidification water of first grade absorption tower 1 enters
Swivel nozzle 3 is provided with mouth 15, swivel nozzle 3 sprays into the waste water from wastewater collection tank 8 and forms spray as humidification water, humidification water
Mist reduces cigarette temperature.Under cryogenic, absorbent activity improves, and is easy to the sour gas in flue gas in first grade absorption tower 1
Hybrid reaction, complete the absorption of sour gas.The setting of swivel nozzle 3 simultaneously also avoid using knot caused by plain nozzle
Dirt, clogging.Due to spraying into humidification water in first grade absorption tower 1 so that flue-gas temperature is greatly lowered, and drops to 70 DEG C or so,
Flue gas after cooling is easier to react with absorbent.Two-level absorption tower 7 is wet desulfuration tower, and the middle part of two-level absorption tower 7 is through pipeline
It is connected with two-grade desulfurizing agent slurry tank 17, the bottom of two-level absorption tower 7 connects wastewater collection tank 8 through pipeline.When flue gas enters two level
Behind absorption tower 7, flue gas carries out reverse contact with the slurries in two-level absorption tower 7 and reacted, so that titanium dioxide in flue gas
Sulphur further absorbs.Absorbent inside first grade absorption tower 1 is white lime, and the absorbent inside two-level absorption tower 7 is lime stone
Slurries.Absorbent inside first grade absorption tower 1 mixes with the sulfur dioxide in flue gas and reacts generation CaSO3And CaSO4, complete
The absorption of sulfur dioxide, while other sour gas such as sulfur trioxide, hydrogen chloride, hydrogen fluoride are also anti-with calcium hydroxide in flue gas
Should, complete to absorb.After flue gas enters two-level absorption tower 7, sulfur dioxide in flue gas and lime stone slurry reaction generation gypsum, enter
One step absorbs the sulfur dioxide in flue gas.
The bottom of cyclone separator 4 connects the first order absorption agent entrance 16 of first grade absorption tower 1 through skewed slot 12.By first grade desulfurizing
The flue gas for carrying a large amount of solid particles afterwards is discharged from the top of first grade absorption tower 1, into cyclone separator 4.Flue gas and flying dust are revolving
Separated in wind separator 4, the particle separated is together with the absorbent that first grade desulfurizing agent feed bin 9 supplements by skewed slot 12
It is recycled back in first grade absorption tower 1 and participates in desulphurization reaction again so that up to a hundred times of solid particle iterative cycles, improves absorbent
Utilization rate.Air-introduced machine 6 is additionally provided with pipeline between deduster 5 and Venturi 2, the flue gas that boiler air preheater 10 goes out enters
The dedusting of deduster 5, the flue gas after dedusting enter the desulfurization of first grade absorption tower 1 by air-introduced machine 6 through Venturi 2.Two level absorbs
The top of tower 7 is additionally provided with demister 13, and the flue gas after purification enters chimney 11 by demister 13 by flue.Absorbed simultaneously in two level
The bottom of tower 7 is also connected by pipeline with vacuum belt machine 14, completes the post processing of two-grade desulfurizing product gypsum.First grade absorption tower 1
Interior product, the solid particle in Venturi 2, cyclone separator 4 and deduster 5 etc. fall into ash bucket cancel mine backfilling,
Use on road basis.The humidification water that first grade absorption tower 1 sprays into mainly is given up using caused by the wet desulphurization of two-level absorption tower 7 or power plant
Water, realize wastewater zero discharge.
Embodiment 2：As shown in figure 1, a kind of coal steam-electric plant smoke sulfur dioxide and waste water coprocessing system are inhaled including one-level
Tower 1, Venturi 2, cyclone separator 4, deduster 5, air-introduced machine 6, two-level absorption tower 7, wastewater collection tank 8, one-level is received to take off
Sulphur agent feed bin 9, chimney 11 and two-grade desulfurizing agent slurry tank 17, deduster 5 is through flue and air-introduced machine 6, Venturi 2, one-level
Absorption tower 1, cyclone separator 4, two-level absorption tower 7, chimney 11 are sequentially connected.First grade absorption tower 1 is connected with two-level absorption tower 7 and set
Put after deduster 5, the flue gas that boiler air preheater 10 comes out enters the dedusting of deduster 5, enters first grade absorption tower by air-introduced machine 6
1 desulfurization, the desulfurization of two-level absorption tower 7 is entered back into, realizes two-grade desulfurizing.First grade absorption tower 1 is semi-dry desulphurization tower, first grade absorption tower
1 side is provided with humidification water inlet 15 and first order absorption agent entrance 16.Humidification water inlet 15 is connected through pipeline with wastewater collection tank 8,
Waste water in wastewater collection tank 8 is used as humidification water, humidification water and high temperature by humidifying water inlet 15 into the inside of first grade absorption tower 1
Smoke contacts, water evaporation will be humidified using flue-gas temperature, realizes wastewater zero discharge.First order absorption agent entrance 16 is through pipeline and one
Level desulfurizing agent feed bin 9 is connected, and the absorbent in feed bin is entered inside first grade absorption tower 1 by first order absorption agent entrance 16.Due to
Humidification water is sprayed into first grade absorption tower 1 so that flue-gas temperature is greatly lowered, humidity increase so that first grade desulfurizing agent activity is entered
One step improves, it is easier to absorbs the sulfur dioxide in flue gas.Two-level absorption tower 7 is wet desulfuration tower, and the middle part of two-level absorption tower 7 passes through
Pipeline is connected with two-grade desulfurizing agent slurry tank 17, after flue gas enters two-level absorption tower 7, flue gas and the slurry in two-level absorption tower 7
Liquid reacts, so that sulfur dioxide in flue gas further absorbs.The bottom of two-level absorption tower 7 connects wastewater collection tank 8 through pipeline,
The humidification water that first grade absorption tower 1 sprays into mainly using waste water caused by the wet desulphurization of two-level absorption tower 7 or power plant, realizes useless
Water zero discharge.
Operation principle of the present utility model：First grade absorption tower 1 and two-level absorption tower 7 form two-stage absorption tower and are connected on dedusting
Between device 5 and chimney 11.First grade absorption tower 1 is half-dried desulfurizing tower, and the entrance of first grade absorption tower 1 is connected with air-introduced machine 6, and outlet is successively
It is connected with cyclone separator 4, two-level absorption tower 7.The bottom of first grade absorption tower 1 is provided with Venturi 2, and side is provided with swivel nozzle
3 and absorbent entrance 16.From the flue gas that deduster 5 comes out after the acceleration of Venturi 2, into first grade absorption tower 1, in one-level
The porch of absorption tower 1, the waste water from wastewater collection tank 8 is sprayed into as humidification water with swivel nozzle 3 so that flue gas cooling drop
Temperature, increase smoke moisture, improve absorbent activity, complete first grade desulfurizing.Boiler smoke is after first grade desulfurizing into whirlwind point
From device 4, the separation of gas-solid particle is completed in cyclone separator 4, solid particle the bottom of cyclone separator 4 through skewed slot 12 with constantly
The hydrated lime in powder of supplement returns to first grade absorption tower 1 and recycled together.Flue gas enters two-level absorption tower from the top of cyclone separator 4
7, two-level absorption tower 7 is wet desulphurization tower.In two-level absorption tower 7, flue gas is inversely contacted with the slurries of circulated sprinkling, is entered
One step completes the double absorption of sulfur dioxide in flue gas, ensures that the efficiency of whole desulphurization system.At the bottom of two-level absorption tower 7
Portion is connected through pipeline with vacuum belt machine 14, and dewater treatment is carried out to product caused by desulphurization system.At the middle part of two-level absorption tower 7
It is connected through pipeline with two-grade desulfurizing agent slurry tank 17, so as to the fresh limestone needed for replenishment system constantly into two-level absorption tower 7
Slurries, it is ensured that desulfuration efficiency.Wastewater collection is to wastewater collection tank 8 caused by the desulfurization of two-level absorption tower 7, and wastewater collection tank 8 is through pipe
Road is connected with the humidification water inlet 15 of first grade absorption tower 1, and the waste water in collecting tank is sprayed into first grade absorption tower by swivel nozzle 3
1 inside is used as humidification water so that flue-gas temperature is greatly lowered, and humidity improves, and improves the activity of first order absorption agent, improves de-
Sulphur efficiency.
Claims (7)
1. a kind of coal steam-electric plant smoke sulfur dioxide and waste water coprocessing system, it is characterised in that including first grade absorption tower (1),
Venturi (2), cyclone separator (4), deduster (5), air-introduced machine (6), two-level absorption tower (7), wastewater collection tank (8),
First grade desulfurizing agent feed bin (9), chimney (11) and two-grade desulfurizing agent slurry tank (17), the deduster (5) is through flue and air-introduced machine
(6), Venturi (2), first grade absorption tower (1), cyclone separator (4), two-level absorption tower (7), chimney (11) are sequentially connected；
The first grade absorption tower (1) is semi-dry desulphurization tower, and first grade absorption tower (1) side is provided with humidification water inlet (15) and first order absorption
Agent entrance (16), humidification water inlet (15) are connected through pipeline with wastewater collection tank (8), first order absorption agent entrance (16) through pipeline and
First grade desulfurizing agent feed bin (9) is connected；The two-level absorption tower (7) is wet desulfuration tower, in the middle part of two-level absorption tower (7) through pipeline with
Two-grade desulfurizing agent slurry tank (17) connects, and two-level absorption tower (7) bottom connects wastewater collection tank (8) through pipeline.
2. coal steam-electric plant smoke sulfur dioxide according to claim 1 and waste water coprocessing system, it is characterised in that also set
There is skewed slot (12), cyclone separator (4) bottom connects the first order absorption agent entrance of first grade absorption tower (1) through skewed slot (12)
(16)。
3. coal steam-electric plant smoke sulfur dioxide according to claim 2 and waste water coprocessing system, it is characterised in that described
Humidification water inlet (15) place of first grade absorption tower (1) is additionally provided with swivel nozzle (3).
4. coal steam-electric plant smoke sulfur dioxide according to claim 3 and waste water coprocessing system, it is characterised in that described
Demister (13) is additionally provided between two-level absorption tower (7) and chimney (11), the demister (13) is placed in two-level absorption tower (7) top
Portion.
5. coal steam-electric plant smoke sulfur dioxide according to claim 4 and waste water coprocessing system, it is characterised in that also set
There is vacuum belt machine (14), two-level absorption tower (7) bottom is also by pipeline communication in vacuum belt machine (14).
6. coal steam-electric plant smoke sulfur dioxide according to claim 5 and waste water coprocessing system, it is characterised in that described
Deduster (5) is electrostatic precipitator and/or electrostatic fabric filter.
7. coal steam-electric plant smoke sulfur dioxide according to claim 6 and waste water coprocessing system, it is characterised in that described
The internal absorbent of first grade desulfurizing agent feed bin (9) is white lime, and the internal absorbent of the two-grade desulfurizing agent slurry tank (17) is
Lime stone slurry.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720315853.3U CN206621985U (en) | 2017-03-28 | 2017-03-28 | A kind of coal steam-electric plant smoke sulfur dioxide and waste water coprocessing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720315853.3U CN206621985U (en) | 2017-03-28 | 2017-03-28 | A kind of coal steam-electric plant smoke sulfur dioxide and waste water coprocessing system |
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| CN206621985U true CN206621985U (en) | 2017-11-10 |
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| CN201720315853.3U Active CN206621985U (en) | 2017-03-28 | 2017-03-28 | A kind of coal steam-electric plant smoke sulfur dioxide and waste water coprocessing system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108126510A (en) * | 2018-01-16 | 2018-06-08 | 邯郸学院 | A kind of flue gas desulfurization and denitrification equipment |
| CN108636037A (en) * | 2018-05-31 | 2018-10-12 | 北京华元昊峰科技有限公司 | A kind of catalytic cracking flue gas wet desulphurization denitration dust collecting technique and system and device |
| CN108970337A (en) * | 2018-07-26 | 2018-12-11 | 扬州嘉明环保科技有限公司 | Reduce dry method Sulphuric acid device wastewater discharge system and its application method |
-
2017
- 2017-03-28 CN CN201720315853.3U patent/CN206621985U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108126510A (en) * | 2018-01-16 | 2018-06-08 | 邯郸学院 | A kind of flue gas desulfurization and denitrification equipment |
| CN108126510B (en) * | 2018-01-16 | 2024-01-26 | 邯郸学院 | Flue gas desulfurization and denitrification equipment |
| CN108636037A (en) * | 2018-05-31 | 2018-10-12 | 北京华元昊峰科技有限公司 | A kind of catalytic cracking flue gas wet desulphurization denitration dust collecting technique and system and device |
| CN108970337A (en) * | 2018-07-26 | 2018-12-11 | 扬州嘉明环保科技有限公司 | Reduce dry method Sulphuric acid device wastewater discharge system and its application method |
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