CN109502671A - A kind of Waste water concentrating decrement treatment system - Google Patents
A kind of Waste water concentrating decrement treatment system Download PDFInfo
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- CN109502671A CN109502671A CN201811324590.8A CN201811324590A CN109502671A CN 109502671 A CN109502671 A CN 109502671A CN 201811324590 A CN201811324590 A CN 201811324590A CN 109502671 A CN109502671 A CN 109502671A
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- gas
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- waste water
- decrement
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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
- C02F1/043—Details
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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
- C02F1/042—Prevention of deposits
-
- 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
- C02F1/06—Flash 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
- C02F1/16—Treatment of water, waste water, or sewage by heating by distillation or evaporation using waste heat from other processes
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/05—Conductivity or salinity
- C02F2209/055—Hardness
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/22—Eliminating or preventing deposits, scale removal, scale prevention
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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)
- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
Abstract
The present invention provides a kind of Waste water concentrating decrement treatment systems, tower is reduced including concentration, concentration decrement tower lower part is equipped with gas feed, concentration decrement top of tower is equipped with gas vent, top is equipped with spray system in concentration decrement tower, is concentrated by evaporation filler and is set in concentration decrement tower and is located above gas feed, below spray system；Concentration decrement tower bottom is equipped with discharge outlet, and discharge outlet connects water tank, and water tank connects spray system by water circulating pump；The water tank is equipped with wastewater feed mouth and concentrated water discharge mouth.The temperature of the gas entered from the gas feed is higher than environment temperature, and is higher than the waste water temperature entered from the wastewater feed mouth.The present invention realizes the concentration decrement of waste water, alleviates the load of curing module；The fouling of wastewater heat exchange device can be avoided without heating to waste water；Without depth except hard pretreatment, the medicine consumption of wastewater zero discharge system, the technique for simplifying wastewater zero discharge system are reduced；And clean condensed water can be recycled.
Description
Technical field
The present invention relates at thermal power plant environmental technology field more particularly to a kind of Waste Water From Fire Power Plant concentration decrement
Reason system.
Background technique
In thermal power generating technology field, 95% coal unit uses " limestone-gypsum " method wet desulfurizing process, in order to tie up
The operation for holding desulphurization system needs that waste water is discharged.Wet desulphurization waste water is the difficult point of power plant effluent zero-emission, power plant effluent zero-emission
It puts and also generally refers to desulfurization wastewater zero-emission.How to handle to lower cost this effluent part becomes the emphasis of research.Currently,
Newly-built coal-burning power plant requires the necessary fully recovering of waste water in the environmental impact assessment stage without exception, is unable to outlet.Some areas are
Building power plant, also requirement will carry out wastewater zero discharge processing." thermal power plant's prevention and cure of pollution skill of Chinese Ministry of Environmental Protection's in January, 2017 publication
Art policy " in be distinctly claimed: " thermal power plant's water prevention and cure of pollution should follow classification processing, the principle of multi-purpose water.Encourage thermal power plant real
The recycling of existing waste water not outlet ".
The total salt amount of wet desulphurization waste water, chloride ion, hardness, suspended matter, content of beary metal are all very high, and reuse approach is very
Limited, processing difficulty is also very big.Currently, generally use " pretreatment (chemical tendering+separation)+(film concentration/thermal method is dense for concentration
Contracting)+solidify (evaporative crystallization/flue evaporation) " treatment process, process flow is long, and operation difficulty is big, and investment and operating cost are non-
Chang Gao.
In order to realize wastewater membrane concentration or thermal method concentration decrement, it is typically necessary and waste water is pre-processed.And it pre-processes
Dosing is at high cost, system complex, and the degree of automation is low.(predominantly multi-effect flashing steam evaporator or mechanical compression are followed again for thermal method concentration
Ring evaporator) it needs to heat waste water, cause heat-transfer surface to be easy fouling.In order to avoid the fouling of heat-transfer surface, and need pair
Water carries out depth pretreatment.Embrane method concentration need to improve pretreatment level in the prevalence of the stifled problem of dirt, to improve reliability, in advance
Processing requirement is concentrated higher than thermal method.Therefore, if can develop one kind need not pre-process or only need simply pretreatment (removal suspension
Object) Waste water concentrating technique, the reliability of wastewater zero discharge system will be greatly improved, shortens the technique stream of wastewater zero discharge system
Journey.
Summary of the invention
The technical problem to be solved by the present invention is how to avoid waste water from heating the fouling for leading to heat-transfer surface, so that high saliferous
Amount, high rigidity waste water (such as desulfurization wastewater) abatement system reduce in preprocessing process to desalination, except hard requirement.
In order to solve the above-mentioned technical problem, the technical solution of the present invention is to provide a kind of Waste water concentrating decrement treatment system,
It is characterized by comprising concentrations to be reduced tower, and concentration decrement tower lower part is equipped with gas feed, and concentration decrement top of tower goes out equipped with gas
Mouthful, top is equipped with spray system in concentration decrement tower, is concentrated by evaporation filler and is set in concentration decrement tower and is located in gas feed
Below side, spray system；Concentration decrement tower bottom is equipped with discharge outlet, and discharge outlet connects water tank, and water tank is connected by water circulating pump
Spray system；The water tank is equipped with wastewater feed mouth and concentrated water discharge mouth.
Preferably, from the gas feed enter gas temperature be higher than environment temperature, and be higher than from the waste water into
The waste water temperature that material mouth enters.
Preferably, the gas entered from the gas feed uses the boiler hot Secondary Air or flue gas of coal-burning power plant, or warp
Cross the mixing wind of the air of heating or the boiler hot Secondary Air of coal-burning power plant and cold air, or the gas vent of concentration decrement tower
Gas of the gas of discharge after condensation and heat treatment.
Preferably, the gas inlet of the concentration decrement tower is equipped with booster fan.
It is highly preferred that the pipeline between the booster fan and the gas feed of concentration decrement tower is equipped with gas concurrent heating and adds
Hot device.
It is highly preferred that booster fan entrance connection boiler hot Secondary Air or smoke inlet, air heater outlet and
Gas heater outlet；Cool air inlet connects air heater import；Gas heater import connects gas condenser outlet,
The gas vent connection evacuation port of the concentration decrement top of tower, disappear white heat exchanger import and gas condenser import, and disappear white change
Hot device outlet connection chimney；Gas condenser is equipped with water outlet.
Preferably, the pipeline that the water tank is connect with spray system is equipped with waste water heater.
Preferably, the decrement concentration tower is multiple is arranged in series.
Preferably, gas enters concentration decrement tower by gas feed；Waste water enters water tank by wastewater feed mouth, then passes through
It crosses water circulating pump and is sent to spray system, be evenly arranged on evaporation and concentration filler surface in the form of moisture film after spray system is atomized,
It is inversely contacted with gas, carries out heat and mass transfer process；Vapor after evaporation enters gas, and gas carries vapor and passes through gas
Outlet discharge；Concentrate after concentration is down to concentration decrement tower bottom and is discharged into water tank, finally by the concentrated water discharge mouth of water tank
Discharge.
Preferably, the water tank is additionally provided with cleaning water inlet, and the pressure difference before and after being concentrated by evaporation filler reaches given threshold
When, the waste water in system and pipeline is drained, ejected wash water enters water tank realization system circulation scale removal by rushing clear water entrance.
Compared with prior art, Waste water concentrating decrement treatment system provided by the invention has the following beneficial effects:
1) the concentration decrement for realizing waste water, alleviates the load of curing module；
2) fouling of wastewater heat exchange device can be avoided without heating to waste water；
3) the medicine consumption of wastewater zero discharge system is reduced, wastewater zero discharge system is simplified except hard pretreatment without depth
Technique；
4) clean condensed water can be recycled.
Detailed description of the invention
Fig. 1 is Waste water concentrating decrement treatment system structure diagram provided by the invention；
Fig. 2 is a certain concrete application schematic diagram of Waste water concentrating decrement treatment system；
Description of symbols:
1-boiler hot Secondary Air or smoke inlet, 2-cool air inlets, 3-condensing gas entrances, 4-cleaning water inlets,
5-wastewater feed mouths, 6-concentrated water discharge mouths, 7-evacuation ports, 8-water outlets, 9-valves, 10-air heaters,
11-gas heaters, 12-booster fans, 13-gas concurrent heating heaters, 14-buffering ponds, 15-concentration decrement towers,
16-spray systems, 17-be concentrated by evaporation fillers, 18-water tanks, 19-water circulating pumps, 20-waste water heaters, 21-disappear it is white
Heat exchanger, 22-gas condensers, 23-chimneys, 24-gas feeds, 25-gas vents.
Specific embodiment
Present invention will be further explained below with reference to specific examples.
Fig. 1 is Waste water concentrating decrement treatment system structure diagram, and the Waste water concentrating decrement treatment system includes dense
Reduction tower 15, concentration decrement 15 lower part of tower are equipped with gas feed 24, are equipped with gas vent 25, concentration at the top of concentration decrement tower 15
It is reduced top in tower 15 and is equipped with spray system 16, be concentrated by evaporation filler 17 and be set in concentration decrement tower 15 and be located at gas feed 24
Top, 16 lower section of spray system.Concentration decrement 15 bottom of tower is equipped with discharge outlet 26, and discharge outlet 26 connects water tank 18, and water tank 18 is logical
It crosses water circulating pump 19 and connects spray system 16, form the circulation loop of water.Water tank 18 is equipped with wastewater feed mouth 5 and concentrated water discharge mouth
6。
In use, high-temperature gas enters concentration decrement tower from lower part by gas feed 24 after the pressurization of booster fan 12
15；Waste water enters water tank 18 by wastewater feed mouth 5, is sent to spray system 16 using water circulating pump 19, passes through spray system
It is evenly arranged in the form of moisture film after 16 atomizations and is concentrated by evaporation 17 surface of filler；It is inversely contacted with gas, carries out heat and mass transfer process；
Vapor after evaporation enters gas, is discharged by gas vent 25；Concentrate after concentration is down to concentration decrement 15 bottom of tower
And it is discharged into water tank 18, it is discharged finally by the concentrated water discharge mouth 6 of water tank 18.
As shown in Fig. 2, high-temperature gas can be obtained by following three kinds of approach in some concrete application:
One, using boiler hot Secondary Air or flue gas as the high-temperature gas, boiler hot Secondary Air or flue gas are directly from pot
The hot Secondary Air of furnace or smoke inlet 1 enter booster fan 12；Wherein, boiler hot Secondary Air or smoke inlet 1 and booster fan 12
Valve 9 is provided on the pipeline of connection.
Two, after being heated cold air or cold flue gas into air heater 10 by cool air inlet 2, it is re-used as institute
It states high-temperature gas and enters booster fan 12；Wherein, valve is provided on the pipeline that cool air inlet 2 is connect with air heater 10
9。
Three, by the hot humid gas that is discharged of gas vent 25 of concentration decrement tower 15 after condensing from condensed gas entrance 3 into
Enter gas heater 11 to be heated, is re-used as the high-temperature gas and enters booster fan 12.Wherein, condensed gas entrance 3 with
Valve 9 is provided on the pipeline that gas heater 11 connects.
High-temperature gas can arbitrarily choose above-mentioned one or more kinds of approach parallel connection and obtain, and after regarding booster fan 12
Temperature choose whether setting gas concurrent heating heater 13, or setting gas concurrent heating heater 13 as supplemental heat source it is further
Control enters the gas temperature of decrement concentration tower 15.
The hot humid gas being discharged after decrement concentration tower 15 is handled, wherein steam partial pressure is substantially equal at this temperature
Saturated steam partial pressure.If not needing recycling fresh water, can directly be emptied by evacuation port 7；Or by introduction into white change that disappear
Chimney 23 is re-introduced into after carrying out eliminating white smoke before hot device 21；Or condensed by gas condenser 22, fresh water passes through fresh water after condensation
8 recycling of outlet, gas imported into condensed gas entrance 3, form Adiabatic Expansion circuit.The processing of hot humid gas can select
Any one of the above or kinds of schemes are in parallel.
Waste water heater 20 is set on the pipeline that water tank 18 is connect with spray system 16, to improve thickening efficiency, or
Come in winter coolant-temperature gage it is extremely low when, may be selected to open 20 heated waste water of waste water heater, but heating temperature need to be controlled and avoid fouling.
For the tower height for reducing decrement concentration tower 15, the two-stage that can connect is reduced concentration tower 15 and other appurtenances.
In the present embodiment, being concentrated by evaporation filler 17 is Ke Kuaisugenghuan type.
Concentration decrement tower 15 and evaporation and concentration filler 17 of the invention can select organic material, such as glass reinforced plastic, plastics；Or
Corrosion resistant metal material.
To guarantee equipment safety, the gas temperature into concentration decrement tower 17 is controlled at 100 DEG C hereinafter, going out concentration decrement tower
15 gas temperature has reached adiabatic saturation temperature, different and different from humidity depending on gas inlet temperature, generally at 40 DEG C or so.
Importeding into concentration decrement tower 15 again by the condensed gas of condenser 22 may be implemented the closed cycle of gas, keep away
Exempt from " white cigarette " visual pollution.It is dense according to the concentrated water of the concentrated water density of measurement water tank 18 or periodically discharge after circulation concentration
Water enters downsteam processing facilities.
When the pressure difference increase for being concentrated by evaporation 17 front and back of filler, the waste water in system and pipeline can be drained, ejected wash water passes through
It rushes clear water entrance 4 and enters system circulation scale removal, ejected wash water can be sour water or other melt dirty medicament aqueous solution.Systematic failures row
Draining can import buffering pond 14 after draining and clean before water, cleaning.
In Waste water concentrating decrement treatment system provided by the invention, waste water heated without heating or extremely low load after from tower
Top spray enters, and forms moisture film in filler surface, carries out heat and mass transfer process with the hot gas for being higher than waste water temperature, water evaporation is steamed at water
Enter gas after gas, waste water realizes concentration.Gas is heated or is used hot Secondary Air or the side of other hot gas by heat exchanger
Formula imports concentration decrement tower from tower bottom, with waste water reverse flow, carries vapor discharge concentration decrement tower.Waste water can be without adding
Heat avoids the possibility of heat exchanger components fouling, therefore waste water can be directly entered concentration decrement of the invention without sofening treatment
Tower is reduced, and the waste water after decrement enters curing module solidification.The present invention is suitable at the wastewater minimisation of such as desulfurization wastewater
Reason relatively flashes thermal method concentration and improves reliability, simplifies the process of desulfurization wastewater zero-emission.
The above, only presently preferred embodiments of the present invention, not to the present invention in any form with substantial limitation,
It should be pointed out that under the premise of not departing from the method for the present invention, can also be made for those skilled in the art
Several improvement and supplement, these are improved and supplement also should be regarded as protection scope of the present invention.All those skilled in the art,
Without departing from the spirit and scope of the present invention, when made using disclosed above technology contents it is a little more
Dynamic, modification and the equivalent variations developed, are equivalent embodiment of the invention；Meanwhile all substantial technologicals pair according to the present invention
The variation, modification and evolution of any equivalent variations made by above-described embodiment, still fall within the range of technical solution of the present invention
It is interior.
Claims (10)
1. a kind of Waste water concentrating decrement treatment system, it is characterised in that: tower (15) are reduced including concentration, under concentration decrement tower (15)
Portion is equipped with gas feed (24), is equipped with gas vent (25) at the top of concentration decrement tower (15), and top is set in concentration decrement tower (15)
Have spray system (16), be concentrated by evaporation filler (17) in concentration decrement tower (15) and be located at gas feed (24) top, spray
Below leaching system (16)；Concentration decrement tower (15) bottom is equipped with discharge outlet (26), and discharge outlet (26) connects water tank (18), water tank
(18) pass through water circulating pump (19) connection spray system (16)；The water tank (18) is equipped with wastewater feed mouth (5) and concentrated water discharge
Mouth (6).
2. a kind of Waste water concentrating decrement treatment system as described in claim 1, it is characterised in that: from the gas feed (24)
The temperature of the gas of entrance is higher than environment temperature, and is higher than the waste water temperature entered from the wastewater feed mouth (5).
3. a kind of Waste water concentrating decrement treatment system as claimed in claim 1 or 2, it is characterised in that: from the gas feed
(24) gas entered uses the boiler hot Secondary Air or flue gas of coal-burning power plant, or passes through the air or coal-burning power plant heated
The mixing wind of boiler hot Secondary Air and cold air, or concentration are reduced the gas of gas vent (25) discharge of tower (15) through condensing simultaneously
Gas after heat treatment.
4. a kind of Waste water concentrating decrement treatment system as described in claim 1, it is characterised in that: the concentration is reduced tower (15)
Gas feed (24) at be equipped with booster fan (12).
5. a kind of Waste water concentrating decrement treatment system as claimed in claim 4, it is characterised in that: the booster fan (12) with
Pipeline between the gas feed (24) of concentration decrement tower (15) is equipped with gas concurrent heating heater (13).
6. a kind of Waste water concentrating decrement treatment system as claimed in claim 4, it is characterised in that: the booster fan (12) enters
Mouth connection boiler hot Secondary Air or smoke inlet (1), air heater (10) outlet and gas heater (11) outlet；Cold air
Entrance (2) connects air heater (10) import；Gas heater (11) import connects gas condenser (22) outlet, described dense
At the top of reduction tower (15) gas vent (25) connection evacuation port (7), disappear (21) import of white heat exchanger and gas condenser
(22) import, disappear white heat exchanger (21) outlet connection chimney (23)；Gas condenser (22) is equipped with water outlet (8).
7. a kind of Waste water concentrating decrement treatment system as described in claim 1, it is characterised in that: the water tank (18) and spray
The pipeline of system (16) connection is equipped with waste water heater (20).
8. a kind of Waste water concentrating decrement treatment system as described in claim 1, it is characterised in that: the decrement concentration tower (15)
It is arranged in series to be multiple.
9. a kind of Waste water concentrating decrement treatment system as described in claim 1, it is characterised in that: gas passes through gas feed
(24) enter concentration decrement tower (15)；Waste water enters water tank (18) by wastewater feed mouth (5), send using water circulating pump (19)
To spray system (16), it is evenly arranged in the form of moisture film after spray system (16) are atomized and is concentrated by evaporation filler (17) surface,
It is inversely contacted with gas, carries out heat and mass transfer process；Vapor after evaporation enters gas, and gas carries vapor and passes through gas
Export (25) discharge；Concentrate after concentration is down to concentration decrement tower (15) bottom and is discharged into water tank (18), finally by water tank
(18) concentrated water discharge mouth (6) discharge.
10. a kind of Waste water concentrating decrement treatment system as described in claim 1, it is characterised in that: the water tank (18) also sets
There are cleaning water inlet (4), when the pressure difference being concentrated by evaporation before and after filler (17) reaches given threshold, drains in system and pipeline
Waste water, ejected wash water realize system circulation scale removal into water tank (18) by rushing clear water entrance (4).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811324590.8A CN109502671A (en) | 2018-11-08 | 2018-11-08 | A kind of Waste water concentrating decrement treatment system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811324590.8A CN109502671A (en) | 2018-11-08 | 2018-11-08 | A kind of Waste water concentrating decrement treatment system |
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| CN109502671A true CN109502671A (en) | 2019-03-22 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112047408A (en) * | 2020-07-16 | 2020-12-08 | 安徽同速环保科技有限公司 | High-salt high-organic-matter wastewater treatment evaporation tower and treatment method thereof |
| CN112607809A (en) * | 2020-12-11 | 2021-04-06 | 杭州蕴泽环境科技有限公司 | Desulfurization wastewater concentration system and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106865667A (en) * | 2017-04-13 | 2017-06-20 | 盛发环保科技（厦门）有限公司 | A kind of desulfurization wastewater fume afterheat concentrates abatement system and its technique |
| CN108408808A (en) * | 2018-03-21 | 2018-08-17 | 国电南京电力试验研究有限公司 | A kind of heat smoke discharges the thermal wastewater concentration systems and method of water cycle naturally |
| CN209411826U (en) * | 2018-11-08 | 2019-09-20 | 上海发电设备成套设计研究院有限责任公司 | Waste water concentrating decrement treatment system |
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2018
- 2018-11-08 CN CN201811324590.8A patent/CN109502671A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106865667A (en) * | 2017-04-13 | 2017-06-20 | 盛发环保科技（厦门）有限公司 | A kind of desulfurization wastewater fume afterheat concentrates abatement system and its technique |
| CN108408808A (en) * | 2018-03-21 | 2018-08-17 | 国电南京电力试验研究有限公司 | A kind of heat smoke discharges the thermal wastewater concentration systems and method of water cycle naturally |
| CN209411826U (en) * | 2018-11-08 | 2019-09-20 | 上海发电设备成套设计研究院有限责任公司 | Waste water concentrating decrement treatment system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112047408A (en) * | 2020-07-16 | 2020-12-08 | 安徽同速环保科技有限公司 | High-salt high-organic-matter wastewater treatment evaporation tower and treatment method thereof |
| CN112607809A (en) * | 2020-12-11 | 2021-04-06 | 杭州蕴泽环境科技有限公司 | Desulfurization wastewater concentration system and method |
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