CN105417604B - Utilize the method and device of fume afterheat processing desulfurization wastewater - Google Patents
Utilize the method and device of fume afterheat processing desulfurization wastewater Download PDFInfo
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- CN105417604B CN105417604B CN201610031262.3A CN201610031262A CN105417604B CN 105417604 B CN105417604 B CN 105417604B CN 201610031262 A CN201610031262 A CN 201610031262A CN 105417604 B CN105417604 B CN 105417604B
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- desulfurization wastewater
- concentration
- evaporation
- fume afterheat
- electric precipitator
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/10—Treatment of water, waste water, or sewage by heating by distillation or evaporation by direct contact with a particulate solid or with a fluid, as a heat transfer medium
- C02F1/12—Spray evaporation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F2001/5218—Crystallization
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/18—Nature of the water, waste water, sewage or sludge to be treated from the purification of gaseous effluents
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Treating Waste Gases (AREA)
- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
Abstract
The present invention proposes a kind of device using fume afterheat processing desulfurization wastewater, including, boiler, air preheater, electric precipitator, desulfurizing tower and chimney, which is characterized in that an evaporation concentration device is set between electric precipitator and desulfurizing tower；In the bottom of evaporation concentration device setting concentration desulfurization wastewater collecting pit；In desulfurization wastewater pond and evaporation concentration device setting pipeline and water pump II；Increase nozzle in cigarette lane between air preheater and deduster, pipeline and water pump I are set between nozzle and concentration desulfurization wastewater collecting pit.The method have the benefit that saving chemicals used by Conventional waste water processing method；The problems such as existing fume afterheat evaporation technique spray amount is big, and deduster leading portion flue-gas temperature is low, water vapour content is high, pole plate of dust remover is hardened is overcome, desulfurization wastewater zero-emission truly is reached.
Description
Technical field
The present invention relates to a kind of industrially desulfurized wastewater treatment method more particularly to a kind of utilization fume afterheat processing desulfurization are useless
The method and device of water.
Background technique
In general, the processing method of Coal,steam plant with FGD waste water be using neutralize, flocculation, precipitating etc. chemical methodes into
Row.But due to the special nature of thermal power plant desulfurization wastewater, using chemical method, treated that waste water cannot be introduced into system returns
With, and discharge standard is not achieved, do not meet energy-saving and environment-friendly actual requirement.
The spray evaporation processing technique for evaporating to absorb heat with drop developed in recent years has the abundant, used time that exchanges heat
The significant advantages such as short, energy saving.Using boiler tail fume afterheat to desulfurization wastewater carry out spray evaporation processing, it is clear that have compared with
Good prospect.Existing one of the method for carrying out desulfurization wastewater spray evaporation processing using power-plant flue gas waste heat is, in boiler tail
Velocity of flue gas is 5~11m/s in portion's flue and atomizer is arranged in the region of 413K~470K in temperature；It is taken out using water pump
Take desulfurization wastewater, air compressor machine compressed air, compressed air and desulfurization wastewater enter the pressure ratio in atomizer be 0.25~
0.6；Liquid drop speed after atomizer is atomized is 50~80m/s, and size droplet diameter is less than 50um；With flue gas one after atomization and vaporization
Play discharge chimney.This processing method can save chemicals used by Conventional waste water processing method；Overcome existing desulfurization
Waste water treatment system configuration equipment is more in wastewater processing technology, investment is big, operating cost is high and equipment repair and maintenance amount is big lacks
Point；Overcome chloride ion big influence of corrosivity in slant acidity water environment；The increase of smoke moisture and the appropriate drop of flue-gas temperature
It is low, specific resistance grey in deduster is reduced, dust collector efficiency is improved.But there is also several insoluble problems simultaneously：1. by
Before the atomizer of acquisition fume afterheat is placed in deduster, smoke content is big in flue gas, and cigarette lane is easy dust stratification；2. atomization spray
Mouth is placed in front of deduster, and dust collector electrode plate is easy product dew in dust removal process, to influence efficiency of dust collection；3. atomizer
Extremely sensitive to system flue-gas temperature, choosing flue-gas temperature in boiler back end ductwork can only control between 413K-479K, limit to
Property is stronger.4. cannot be using acid dew point flue gas below as evaporation heat source, fume afterheat utilizes insufficient.Obviously, existing skill
There is cigarette lanes to be easy relatively strong dust stratification, limitation, influence efficiency of dust collection and cigarette using fume afterheat processing desulfurization wastewater method for art
The problems such as gas UTILIZATION OF VESIDUAL HEAT IN is insufficient.
Summary of the invention
For solve the prior art using fume afterheat handle desulfurization wastewater method existing for cigarette lane be easy dust stratification, limitation compared with
By force, it influences efficiency of dust collection and fume afterheat utilizes the problems such as insufficient, the present invention proposes that a kind of utilization fume afterheat handles desulfurization
The method and device of waste water.
The method that the present invention handles desulfurization wastewater using fume afterheat, between thermal power plant electric precipitator and desulfurizing tower
One evaporation concentration device is set；Enter evaporation concentration device using water pump extraction desulfurization wastewater and is evaporated concentration, it will
Desulfurization wastewater after concentration is delivered to the cigarette lane between air preheater and electric precipitator, and the desulfurization wastewater after atomization and flue gas are directly mixed
It closes and cigarette lane is added, flue gas is entered after moisture evaporation therein, is captured and enters in flyash by electric precipitator after salinity crystallization, realize
The evaporation of desulfurization wastewater separates.
Further, the heat exchange mode for the evaporator that the evaporation concentration device uses includes directly or indirectly heat exchange.
Further, the atomization technique of the desulfurization wastewater after concentration is atomized using atomizer, and atomizing type includes machinery
Atomization or medium atomization.
The present invention handles the device of desulfurization wastewater using fume afterheat, including, boiler, air preheater, electric precipitator, desulfurizing tower
And chimney a, which is characterized in that evaporation concentration device is set between electric precipitator and desulfurizing tower；In evaporation concentration device
Bottom setting concentration desulfurization wastewater collecting pit；In desulfurization wastewater pond and evaporation concentration device setting pipeline and water pump II；Empty pre-
Increase nozzle in cigarette lane between device and electric precipitator, pipeline and water pump are set between nozzle and concentration desulfurization wastewater collecting pit
Ⅰ。
Further, the evaporator that the evaporation concentration equipment uses includes direct heat exchanging evaporator or indirect heat exchange evaporation
Device.
Further, the nozzle is atomizer, and atomizing type includes mechanical atomization or medium atomization.
The present invention is to save conventional give up using the advantageous effects of the method and device of fume afterheat processing desulfurization wastewater
Chemicals used by method for treating water；Overcome existing fume afterheat evaporation technique spray amount big, deduster leading portion flue gas temperature
It spends that low, water vapour content is high, causes cigarette lane dust stratification, pole plate of dust remover is hardened, ash disposal is difficult and acid dew point increases, pole plate is rotten
The problems such as erosion aggravation, reach desulfurization wastewater zero-emission truly.
Detailed description of the invention
Attached drawing 1 is schematic diagram of the invention using fume afterheat processing desulfurization wastewater device.
The method and dress of fume afterheat processing desulfurization wastewater are utilized to the present invention with reference to the accompanying drawings and detailed description
It sets and is further described.
Specific embodiment
Attached drawing 1 is to invent the schematic diagram that desulfurization wastewater device is handled using fume afterheat, and in figure, 1 is boiler, and 2 remove for electricity
Dirt device, 3 be desulfurizing tower, and 4 be chimney, and 5 be water pump I, and 6 be concentration desulfurization wastewater collecting pit, and 7 be water pump II, and 8 be desulfurization wastewater
Pond, 9 be cigarette lane, and 10 be evaporation concentration device, and 11 be air preheater.As seen from the figure, the present invention is useless using fume afterheat processing desulfurization
The device of water, including, boiler 1, air preheater 11, electric precipitator 2, desulfurizing tower 3 and chimney 4, which is characterized in that in electric precipitator 2
One evaporation concentration device 10 is set between desulfurizing tower 3；In the bottom of evaporation concentration device 10, setting concentration desulfurization wastewater is received
Collect pond 6；In desulfurization wastewater pond 8 and evaporation concentration device 10, pipeline and water pump II 7 are set；Air preheater 11 and electric precipitator 2 it
Increase nozzle in the lane Jian Yan 9, pipeline and water pump I 5 are set between nozzle and concentration desulfurization wastewater collecting pit 6.To guarantee to change
Thermal effect, the evaporator that the evaporation concentration device uses includes direct heat exchanging evaporator or indirect heat exchange evaporator.To guarantee
Atomizing effect, the nozzle are atomizer, and atomizing type includes mechanical atomization or medium atomization.
The method that the present invention handles desulfurization wastewater using fume afterheat, between thermal power plant electric precipitator and desulfurizing tower
One evaporation concentration device is set；Enter evaporation concentration device using water pump extraction desulfurization wastewater and is evaporated concentration, it will
Desulfurization wastewater after concentration is delivered to the cigarette lane between air preheater and electric precipitator, and the desulfurization wastewater after atomization and flue gas are directly mixed
It closes and cigarette lane is added, flue gas is entered after moisture evaporation therein, is captured and enters in flyash by electric precipitator after salinity crystallization, realize
The evaporation of desulfurization wastewater separates.Wherein, the heat exchange mode for the evaporator that the evaporation concentration device uses includes direct or indirect
Heat exchange；The atomization technique of desulfurization wastewater after concentration is atomized using atomizer, and atomizing type includes mechanical atomization or medium mist
Change.
The present invention is additionally arranged one section using the method and device of fume afterheat processing desulfurization wastewater and is concentrated using low-temperature flue gas
The device of desulfurization wastewater changes the arrangement of fume afterheat collection point, be utilized after electric precipitator temperature 353K~
The fume afterheat of 403K is concentrated, and the utilization rate of fume afterheat is improved.Enrichment facility is located at after electric precipitator, and cigarette lane is not
Easy dust stratification, so as to avoid cigarette lane dust stratification, electric precipitator pole plate product dew.Before desulfurization wastewater after concentration recycles electric precipitator
The fume afterheat of 403K~470K is evaporated separation, the final zero-emission for realizing desulfurization wastewater.This method is de- to power-plant flue gas
The processing of sulphur waste water uses partial concentration, can be adjusted according to the variation of power plant load, when fume afterheat temperature reaches temperature
When setting value, then spray evaporation processing is carried out, be suitable for power plant's difference working condition, mobility is stronger.
Obviously, the present invention is to save often using the advantageous effects of the method and device of fume afterheat processing desulfurization wastewater
Advise chemicals used by wastewater treatment method；Overcome existing fume afterheat evaporation technique spray amount big, deduster leading portion cigarette
Temperature degree is low, water vapour content is high, causes cigarette lane dust stratification, pole plate of dust remover is hardened, ash disposal is difficult and acid dew point increases, pole
The problems such as plate corrosion aggravation, reach desulfurization wastewater zero-emission truly.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, all within the spirits and principles of the present invention, any modification, equivalent replacement, improvement and so on should all include
Within protection scope of the present invention.
Claims (6)
1. a kind of method using fume afterheat processing desulfurization wastewater, which is characterized in that the electric precipitator and de- in thermal power plant
One evaporation concentration device is set between sulphur tower；Enter evaporation concentration device using water pump extraction desulfurization wastewater and is evaporated concentration
Processing, is delivered to the cigarette lane between air preheater and electric precipitator for the desulfurization wastewater after concentration, desulfurization wastewater and cigarette after atomization
Gas, which directly mixes, is added cigarette lane, and flue gas is entered after moisture evaporation therein, is captured after salinity crystallization by electric precipitator and enters fine coal
In ash, the evaporation separation of desulfurization wastewater is realized.
2. utilizing the method for fume afterheat processing desulfurization wastewater according to claim 1, which is characterized in that the evaporation and concentration
The heat exchange mode for the evaporator that device uses includes directly or indirectly heat exchange.
3. utilizing the method for fume afterheat processing desulfurization wastewater according to claim 1, which is characterized in that the desulfurization after concentration
The atomization technique of waste water is atomized using atomizer, and atomizing type includes mechanical atomization or medium atomization.
4. a kind of device using fume afterheat processing desulfurization wastewater, which is characterized in that the device includes boiler, air preheater, electricity
Deduster, desulfurizing tower and chimney, which is characterized in that an evaporation concentration device is set between electric precipitator and desulfurizing tower；?
The bottom setting concentration desulfurization wastewater collecting pit of evaporation concentration device；Desulfurization wastewater pond and evaporation concentration device setting pipeline and
Water pump II；Increase nozzle in cigarette lane between air preheater and electric precipitator, between nozzle and concentration desulfurization wastewater collecting pit
Pipeline and water pump I are set.
5. utilizing the device of fume afterheat processing desulfurization wastewater according to claim 4, which is characterized in that the evaporation and concentration
The evaporator that device uses includes direct heat exchanging evaporator or indirect heat exchange evaporator.
6. utilizing the device of fume afterheat processing desulfurization wastewater according to claim 4, which is characterized in that the nozzle is mist
Change nozzle, atomizing type includes mechanical atomization or medium atomization.
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| CN201610031262.3A CN105417604B (en) | 2016-01-18 | 2016-01-18 | Utilize the method and device of fume afterheat processing desulfurization wastewater |
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| CN201610031262.3A CN105417604B (en) | 2016-01-18 | 2016-01-18 | Utilize the method and device of fume afterheat processing desulfurization wastewater |
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| CN105417604A CN105417604A (en) | 2016-03-23 |
| CN105417604B true CN105417604B (en) | 2018-11-20 |
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| CN105854599A (en) * | 2016-05-20 | 2016-08-17 | 福建龙净环保股份有限公司 | Synergistic flue gas treatment system and method |
| CN105967253A (en) * | 2016-05-23 | 2016-09-28 | 南京奥能科技有限公司 | Evaporation process and device of desulfurized wastewater cooling tower |
| CN106277127A (en) * | 2016-10-14 | 2017-01-04 | 北京姚魏环保技术有限公司 | The mixing of a kind of muddy water, double flash evaporation process the device and method of desulfurization wastewater |
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| CN106477794B (en) * | 2016-11-16 | 2019-04-30 | 重庆大学 | The System and method for of desulfurization wastewater concentration and flue gas drying integrated treatment |
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| CN110156099A (en) * | 2018-03-27 | 2019-08-23 | 新疆环境工程技术有限责任公司 | A kind of desulfurization wastewater fume afterheat evaporative crystallization zero-emission integrated approach |
| CN109110846B (en) * | 2018-08-22 | 2021-11-09 | 盛发环保科技（厦门）有限公司 | Desulfurization wastewater flue gas concentration reduction and cementing fixing system and process |
| CN110433609A (en) * | 2019-07-12 | 2019-11-12 | 华北电力大学（保定） | A kind of Desulphurization for Coal-fired Power Plant wastewater zero discharge and flue gas disappear the method and device of white coupling processing |
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Effective date of registration: 20221222 Address after: 400072 No. 9, Jiangxia Road, Nan'an District, Chongqing Patentee after: STATE POWER INVESTMENT CORPORATION YUANDA WATER AFFAIRS CO.,LTD. Patentee after: Dalian Power Generation Co.,Ltd. Address before: No. 9 Jiangxia Road, Nanan District, Chongqing 400060 Patentee before: STATE POWER INVESTMENT CORPORATION YUANDA WATER AFFAIRS CO.,LTD. |
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