CN108658355A - A kind of full factory's waste water drainage system in coal-burning power plant and its application method - Google Patents

A kind of full factory's waste water drainage system in coal-burning power plant and its application method Download PDF

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CN108658355A
CN108658355A CN201810623939.1A CN201810623939A CN108658355A CN 108658355 A CN108658355 A CN 108658355A CN 201810623939 A CN201810623939 A CN 201810623939A CN 108658355 A CN108658355 A CN 108658355A
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waste water
water
coal
wastewater
reactive tank
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王佳宁
赵向阳
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    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F9/00Multistage treatment of water, waste water or sewage
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/001Processes for the treatment of water whereby the filtration technique is of importance
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/02Treatment of water, waste water, or sewage by heating
    • C02F1/04Treatment of water, waste water, or sewage by heating by distillation or evaporation
    • C02F1/06Flash evaporation
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/02Treatment of water, waste water, or sewage by heating
    • C02F1/04Treatment of water, waste water, or sewage by heating by distillation or evaporation
    • C02F1/16Treatment of water, waste water, or sewage by heating by distillation or evaporation using waste heat from other processes
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/44Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/44Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
    • C02F1/441Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/66Treatment of water, waste water, or sewage by neutralisation; pH adjustment
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00Treatment of sludge; Devices therefor
    • C02F11/12Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • C02F11/121Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
    • C02F11/122Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using filter presses
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/52Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F2001/5218Crystallization
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/18Nature of the water, waste water, sewage or sludge to be treated from the purification of gaseous effluents
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00Controlling or monitoring parameters in water treatment
    • C02F2209/06Controlling or monitoring parameters in water treatment pH
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2301/00General aspects of water treatment
    • C02F2301/08Multistage treatments, e.g. repetition of the same process step under different conditions

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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)
  • Treating Waste Gases (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)

Abstract

A kind of full factory's waste water drainage system in coal-burning power plant and its application method, including chemical wastewater abatement system and desulfurization wastewater zero-emission system;Chemical wastewater abatement system includes the first reactive tank for carrying out coarse adjustment to wastewater pH, input terminal of the waste water output end connection of first reactive tank for carrying out the second reactive tank of accurate adjustment to wastewater pH, the input terminal of the fluid output port connection thickener of second reactive tank, the input terminal of thickener output end connection tubular membrane is separated by solid-liquid separation, the fluid output port connection filtering trough of tubular membrane is filtered, and enters desulfurization wastewater zero-emission system after RO process by the filtered waste water of filtering trough;Desulfurization wastewater zero-emission system includes that the multiple-effect separator that is connected after RO process, the tubular membrane bottom are provided with sludge dewatering system, is used by the step of waste water, improves the utilization rate of waste water, by full factory's wastewater comprehensive treatment, improves Sewage treatment rate.

Description

A kind of full factory's waste water drainage system in coal-burning power plant and its application method
Technical field
The present invention relates to environmental technology field, more particularly to the full factory's waste water drainage system in a kind of coal-burning power plant and its user Method.
Background technology
In recent years, country and local environmental protection policy require to be increasingly stringenter.On April 2nd, 2015,《Water prevention and cure of pollution action Plan》Execution is issued, waste water treatment pressure further increases.
Efflux wastewater water in coal-burning power plant's is larger at present, and efflux wastewater is mainly chemical wastewater, desulfurization wastewater, coal water system Effluent etc., all has salt content height, the big feature of variation water quality, and waste water is arranged will be polluted to water environment outside, needs Classification recycling and separate-recycling are carried out according to waste water quality, prevents environmentally friendly event.Therefore, there is an urgent need to establish coal-burning power plant Quan Chang The reasonable system for handling of waste water optimizes full factory's wastewater treatment process, improves water using level, reduces unit generated energy water consume.
This patent is directed to the full factory's wastewater comprehensive treatment in coal-burning power plant, designs wastewater utilization system, establishes desulfurization wastewater Zero discharging system, and chemical wastewater abatement system some residual strong brine and desulfurization wastewater are made entirely by way of evaporative crystallization Factory waste water zero discharge realizes full factory's wastewater comprehensive treatment and utilization, meets the related request of the policies such as environmental protection and water-saving and emission-reducing.
Invention content
In order to overcome the above-mentioned deficiencies of the prior art, the purpose of the present invention is to provide a kind of full factory's waste water rows in coal-burning power plant Place system and its application method are used by the step of waste water by optimizing full factory's water balance system, improve the utilization of waste water Rate improves Sewage treatment rate by full factory's wastewater comprehensive treatment, under the premise of ensuring equipment safety operation, realizes waste water zero Discharge.
To achieve the goals above, the technical solution adopted by the present invention is:
A kind of full factory's waste water drainage system in coal-burning power plant, including chemical wastewater abatement system and desulfurization wastewater zero-emission system;
The chemical wastewater abatement system include for wastewater pH carry out coarse adjustment the first reactive tank, described first Input terminal of the waste water output end connection of reactive tank for carrying out the second reactive tank of accurate adjustment to wastewater pH, second reactive tank Fluid output port connection thickener input terminal, the input terminal that the thickener output end connects tubular membrane carries out solid-liquid point From the fluid output port connection filtering trough of tubular membrane is filtered, and passes through RO techniques by the filtered waste water of filtering trough Enter desulfurization wastewater zero-emission system after processing;
The desulfurization wastewater zero-emission system includes and the multiple-effect separator that is connected after RO process, the tubular membrane bottom Portion is provided with sludge dewatering system.
The desulfurization wastewater zero-emission system includes the flue gas heat-exchange unit installed on desulfurizing tower gas approach, the cigarette Gas heat exchanger output end is provided with the heater for making circulation fluid heat, and the heater output end is connected with multiple-effect separation The output end of device, multiple-effect separator bottom is connected with heater, and dehydration is provided on the waste liquid output end of multiple-effect separator bottom Machine is provided with dehydrated mouth on dewaterer, and air-returen flue heat exchanger is provided on heater, and it is solidifying to be provided with discharge at the top of the multiple-effect separator The condensed water opening of reuse is born water, the opening for Absorption Desulfurization waste water, the flue gas are provided on the multiple-effect separator Heat exchanger is provided with for absorbing heat smoke and discharging the opening of heat smoke.
First reactive tank and the second reactive tank is internally provided with mechanical stirring device and pH monitoring devices.
The thickener is delivered to tubular membrane by circulating pump.
The sludge dewatering system includes the sludge storage tank for being connected to tubular membrane bottom, the sludge storage tank filter press It is connected to the first reactive tank.
The press filtration motor spindle is provided with mud cake collection.
The RO technology processing systems include with filtering trough be sequentially connected logical level-one RO systems, concentrated water RO systems with The outlet end of DTRO systems, the concentrated water RO systems is separately connected desulfurization wastewater zero-emission system, reuse water system and flushing cinder system System.
A kind of application method of the full factory's waste water drainage system in coal-burning power plant,
1) chemical wastewater abatement system will recycle after the high-quality classification of waste of low saline salinity in chemical wastewater, between reaching It connects and reduces waste water displacement;
Waste water I flows into the first reactive tank, and NaOH and Na is added in the first reactive tank2CO3, pH coarse adjustment is carried out, carbonic acid is formed The sediment of calcium and magnesium hydroxide, while magnesium hydroxide carries silica and forms co-precipitation, then waste water flows into the second reaction Slot continues supplement addition medicament, carries out accurate adjustment to pH so that reaction is more complete, and two-stage reaction slot carries out mechanical agitation respectively It is monitored with pH, the water (suspended solid generated containing reaction) after reaction overflows in thickener, is transported to circulating pump Tubular membrane is separated by solid-liquid separation, and the water of big flow recycles between Waste water concentrating slot and tubular membrane at this time, and penetrates tubular membrane Water (water for being equal to input) is then sent to filtering trough short, regard part after pH readjustments to neutrality as advanced treating The water inlet of system, the desalting processing in level-one RO and concentrated water RO and DTRO are further multi-stage PCE and DTRO;
Meanwhile tubular membrane also generates a certain amount of concentrate (sludge), needs to be sent to sludge dewatering system, by sheet frame pressure It entrusts after filter dehydration, outside dehydrated sludge cake and handles or directly fill, desliming water then flows back into system front end and handles again;
2) the remaining strong brine of chemical wastewater abatement system enters desulfurization wastewater zero-emission system;
3) desulfurization wastewater zero-emission system
On desulfurizing tower gas approach, flue gas heat-exchange unit is installed, it will using the heat of heat smoke in desulfurizing tower gas approach Its interior heat transferring medium heating, then so that circulation fluid is heated by heater by thermal medium and enter desulfurization wastewater multiple-effect separator, it is Desulfurization wastewater zero discharge treatment provides heat source;
The desulfurization waste liquor after desalting processing in DTRO (is completed by multiple-effect separator from crystallization technique using multi-effect flashing steam Multiple-effect evaporation crystallization process), the waste liquid in multiple-effect separator is transported to former desulphurization system vacuum belt dewaterer and is dehydrated, Crystallization raffinate transports multiple-effect separator back by heater and continues cycling through use;
The steam that final multiple-effect separator evaporation generates can by condenser by steam condensation at water reuse.
Air-returen flue heat exchanger is provided on the heater, the delivery outlet of flue gas heat-exchange unit is provided with heat smoke outlet.
Beneficial effects of the present invention:
Make its interior heat transferring medium heating by chimney heat exchanger 14, then so that circulation fluid is heated by heater 12 by thermal medium And enter desulfurization wastewater multiple-effect separator 11, heat source is provided for desulfurization wastewater zero discharge treatment, boiler efficiency is not influenced, but The electrical heating energy consumption of traditional heating mode is saved, while operating cost is minimum, investment cost is small, and waste water energy effectively recycles.
Description of the drawings
Fig. 1 is the flow diagram of the present invention.
1 reactive tank 1;2 reactive tanks 2;3 thickeners;4 tubular membranes;5 sludge storage tanks;6 filter presses;7 filtering troughs;8 level-ones RO;9 concentrated water RO;10DTRO;11 multiple-effect separators;12 heaters;13 dewaterers;14 chimney heat exchangers;Water in I;II mud cakes are entrusted Place;III:Flushing cinder;IV recycle-waters;V is dehydrated;VI air-returen flue heat exchangers;VII heat smokes;VIII heat smokes;IX desulfurization wastewaters;X is solidifying Bear water reuse.
Specific implementation mode
Invention is further described in detail below in conjunction with the accompanying drawings.
As shown in Figure 1, a kind of full factory's waste water drainage system in coal-burning power plant, including chemical wastewater abatement system and desulfurization wastewater Zero-emission system;
The chemical wastewater abatement system includes the first reactive tank 1 for carrying out coarse adjustment to wastewater pH, and described the Input terminal of the waste water output end connection of one reactive tank 1 for carrying out the second reactive tank of accurate adjustment 2 to wastewater pH, described second is anti- Answer slot 2 fluid output port connect thickener 3 input terminal, 3 output end of thickener connect tubular membrane 4 input terminal into Row is separated by solid-liquid separation, and the fluid output port connection filtering trough 7 of tubular membrane 4 is filtered, by 7 filtered waste water of filtering trough Enter desulfurization wastewater zero-emission system after RO process;
The desulfurization wastewater zero-emission system includes and the multiple-effect separator 11 that is connected after RO process, the tubular membrane 4 bottoms are provided with sludge dewatering system.
The desulfurization wastewater zero-emission system includes the flue gas heat-exchange unit 14 installed on desulfurizing tower gas approach, described 14 output end of flue gas heat-exchange unit is provided with the heater 12 for making circulation fluid heat, and 12 output end of heater is connected with The output end of multiple-effect separator 11,11 bottom of multiple-effect separator is connected with heater 12, and the waste liquid of 11 bottom of multiple-effect separator is defeated It is provided with dewaterer 13 in outlet, dehydrated mouth is provided on dewaterer 13, air-returen flue heat exchanger VI is provided on heater 12, it is described 11 top of multiple-effect separator is provided with the condensed water opening of discharge condensation water recycling, is provided on the multiple-effect separator 11 for inhaling The opening of desulfurization wastewater IX is received, the flue gas heat-exchange unit 14 is provided with for absorbing heat smoke VII and discharge heat smoke VIII Opening.
First reactive tank 1 and the second reactive tank 2 is internally provided with mechanical stirring device and pH monitoring devices.
The thickener 3 is delivered to tubular membrane 4 by circulating pump.
The sludge dewatering system includes the sludge storage tank 5 for being connected to 4 bottom of tubular membrane, the sludge storage tank 5 pressure Filter 6 is connected to the first reactive tank 1.
6 bottom of filter press is provided with mud cake and collects II.
The RO technology processing systems include being sequentially connected logical level-one RO systems 8, concentrated water RO systems with filtering trough 7 9 with DTRO systems 10, the outlet end of the concentrated water RO systems 9 is separately connected desulfurization wastewater zero-emission system, reuse water system IV With flushing cinder system III.
Operation principle of the present invention:
1) chemical wastewater abatement system will recycle after the high-quality classification of waste of low saline salinity in chemical wastewater, between reaching It connects and reduces waste water displacement;
Waste water I flows into the first reactive tank 1, and NaOH and Na is added in the first reactive tank 12CO3, pH coarse adjustment is carried out, carbon is formed The sediment of sour calcium and magnesium hydroxide, while magnesium hydroxide carries silica and forms co-precipitation, then it is anti-to flow into second for waste water Slot 2 is answered, continues supplement addition medicament, accurate adjustment is carried out to pH so that reaction is more complete, and two-stage reaction slot carries out machinery and stirs respectively PH monitoring is mixed and stirred, the water (suspended solid generated containing reaction) after reaction overflows in thickener 3, is conveyed with circulating pump It is separated by solid-liquid separation to tubular membrane 4, the water of big flow recycles between Waste water concentrating slot 3 and tubular membrane 4 at this time, and penetrates tubular type The water (water for being equal to input) of film 4 is then sent to 7 short of filtering trough, by part after pH readjustments to neutrality as deep The water inlet for spending processing system takes off in level-one RO 8 and concentrated water RO 9 and DTRO 10 do further multi-stage PCE and DTRO 10 Salt treatment;
Meanwhile tubular membrane 4 also generates a certain amount of concentrate (sludge), needs to be sent to sludge dewatering system, by sheet frame The II that entrusts after filter press 6 is dehydrated, outside dehydrated sludge cake is handled or is directly filled, and desliming water then flows back into system front end 1 and handles again;
2) the remaining strong brine of chemical wastewater abatement system enters desulfurization wastewater zero-emission system;
3) desulfurization wastewater zero-emission system
On desulfurizing tower gas approach, flue gas heat-exchange unit 14 is installed, the heat of heat smoke VII in desulfurizing tower gas approach is utilized Amount heats up its interior heat transferring medium, then so that circulation fluid is heated by heater 12 by thermal medium and enter the separation of desulfurization wastewater multiple-effect Device 11 provides heat source for desulfurization wastewater zero discharge treatment;
The desulfurization waste liquor after desalting processing in DTRO 10 is passed through into multiple-effect separator 11 from crystallization technique using multi-effect flashing steam (complete multiple-effect evaporation crystallization process), the waste liquid in multiple-effect separator 11 are transported to former desulphurization system vacuum belt dewaterer 13 Dehydration V is carried out, crystallization raffinate transports multiple-effect separator 11 back by heater 12 and continues cycling through use;
The steam that the final evaporation of multiple-effect separator 11 generates can by condenser by steam condensation at water reuse X.
Air-returen flue heat exchanger VI is provided on the heater 12, the delivery outlet of flue gas heat-exchange unit 14 is provided with heat smoke VIII is exported.

Claims (9)

1. a kind of full factory's waste water drainage system in coal-burning power plant, which is characterized in that including chemical wastewater abatement system and desulfurization wastewater Zero-emission system;
The chemical wastewater abatement system include for wastewater pH carry out coarse adjustment the first reactive tank (1), described first Input terminal of the waste water output end connection of reactive tank (1) for carrying out the second reactive tank of accurate adjustment (2) to wastewater pH, described second The input terminal of the fluid output port connection thickener (3) of reactive tank (2), the thickener (3) output end connect tubular membrane (4) Input terminal be separated by solid-liquid separation, the fluid output port of tubular membrane (4) connection filtering trough (7) is filtered, and passes through drainage Slot (7) filtered waste water enters desulfurization wastewater zero-emission system after RO process;
The desulfurization wastewater zero-emission system includes the multiple-effect separator (11) that is connected with after RO process, the tubular membrane (4) bottom is provided with sludge dewatering system.
2. the full factory's waste water drainage system in a kind of coal-burning power plant according to claim 1, which is characterized in that the desulfurization is useless Water zero-emission system includes the flue gas heat-exchange unit (14) installed on desulfurizing tower gas approach, the flue gas heat-exchange unit (14) output End is provided with the heater (12) for making circulation fluid heat, and the heater (12) output end is connected with multiple-effect separator (11), the output end of multiple-effect separator (11) bottom is connected with heater (12), the waste liquid output of multiple-effect separator (11) bottom It is provided with dewaterer (13) on end, dehydrated mouth is provided on dewaterer (13), air-returen flue heat exchanger (VI) is provided on heater (12), The condensed water that discharge condensation water recycling is provided at the top of the multiple-effect separator (11) is open, on the multiple-effect separator (11) It is provided with the opening for Absorption Desulfurization waste water IX, the flue gas heat-exchange unit (14) is provided with for absorbing heat smoke VII and row The opening of heat release flue gas VIII.
3. the full factory's waste water drainage system in a kind of coal-burning power plant according to claim 1, which is characterized in that described first is anti- Slot (1) is answered to be internally provided with mechanical stirring device and pH monitoring devices with the second reactive tank (2).
4. the full factory's waste water drainage system in a kind of coal-burning power plant according to claim 1, which is characterized in that the thickener (3) tubular membrane (4) is delivered to by circulating pump.
5. the full factory's waste water drainage system in a kind of coal-burning power plant according to claim 1, which is characterized in that the sludge is de- Water system includes being connected to the sludge storage tank (5) of tubular membrane (4) bottom, sludge storage tank (5) filter press (6) connection first Reactive tank (1).
6. the full factory's waste water drainage system in a kind of coal-burning power plant according to claim 5, which is characterized in that the filter press (6) bottom is provided with mud cake and collects II.
7. the full factory's waste water drainage system in a kind of coal-burning power plant according to claim 1, which is characterized in that the RO techniques Processing system includes being sequentially connected logical level-one RO systems (8), concentrated water RO systems (9) and DTRO systems with filtering trough (7) (10), the outlet end of the concentrated water RO systems (9) is separately connected desulfurization wastewater zero-emission system, reuse water system IV and flushing cinder system Unite III.
8. a kind of application method of the full factory's waste water drainage system in coal-burning power plant, which is characterized in that include the following steps,
1) chemical wastewater abatement system will recycle after the high-quality classification of waste of low saline salinity in chemical wastewater, reach and subtract indirectly Few waste water displacement;
Waste water I flows into the first reactive tank (1), and NaOH and Na is added in the first reactive tank (1)2CO3, pH coarse adjustment is carried out, carbon is formed The sediment of sour calcium and magnesium hydroxide, while magnesium hydroxide carries silica and forms co-precipitation, then it is anti-to flow into second for waste water Slot (2) is answered, continues supplement addition medicament, accurate adjustment is carried out to pH so that reaction is more complete, and two-stage reaction slot carries out machinery respectively Stirring and pH monitoring, the water after reaction overflow in thickener (3), are transported to tubular membrane (4) with circulating pump and carry out solid-liquid Separation, the water of big flow recycles between Waste water concentrating slot (3) and tubular membrane (4) at this time, and the water for penetrating tubular membrane (4) is then sent Toward filtering trough (7) short, by water inlet of the part as advanced treatment system after pH readjustments to neutrality, in level-one RO (8) and concentrated water RO (9) and DTRO (10) does desalting processing in further multi-stage PCE and DTRO (10);
Meanwhile tubular membrane (4) also generates a certain amount of concentrate, needs to be sent to sludge dewatering system, by plate and frame filter press (6) The II that entrusts after dehydration, outside dehydrated sludge cake is handled or is directly filled, and desliming water then flows back into system front end (1) and handles again;
2) the remaining strong brine of chemical wastewater abatement system enters desulfurization wastewater zero-emission system;
3) desulfurization wastewater zero-emission system
On desulfurizing tower gas approach, flue gas heat-exchange unit (14) is installed, the heat of heat smoke VII in desulfurizing tower gas approach is utilized Its interior heat transferring medium is heated up, then so that circulation fluid is heated by heater (12) by thermal medium and enters the separation of desulfurization wastewater multiple-effect Device (11) provides heat source for desulfurization wastewater zero discharge treatment;
It is from crystallization technique that the desulfurization waste liquor after desalting processing in DTRO (10) is (complete by multiple-effect separator 11 using multi-effect flashing steam At multiple-effect evaporation crystallization process), the waste liquid in multiple-effect separator 11 is transported to former desulphurization system vacuum belt dewaterer (13) Dehydration V is carried out, crystallization raffinate transports multiple-effect separator (11) back by heater (12) and continues cycling through use;
The steam that final multiple-effect separator (11) evaporation generates can by condenser by steam condensation at water reuse X.
9. a kind of application method of the full factory's waste water drainage system in coal-burning power plant according to claim 8, which is characterized in that institute Air-returen flue heat exchanger VI is provided on the heater (12) stated, the delivery outlet of flue gas heat-exchange unit (14) is provided with heat smoke VIII and goes out Mouthful.
CN201810623939.1A 2018-06-15 2018-06-15 A kind of full factory's waste water drainage system in coal-burning power plant and its application method Pending CN108658355A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108516648A (en) * 2018-06-15 2018-09-11 王佳宁 A kind of full factory's waste water drainage system in coal-burning power plant
CN111596621A (en) * 2020-04-13 2020-08-28 中国大唐集团科学技术研究院有限公司火力发电技术研究院 Intelligent water affair on-line monitoring, control and management system of thermal power plant
CN112979004A (en) * 2021-03-23 2021-06-18 国能朗新明环保科技有限公司 Thermal power plant whole-plant wastewater zero-discharge treatment system and method

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Application publication date: 20181016