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 PDFInfo
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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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- 239000002351 wastewater Substances 0.000 title claims abstract description 119
- 238000000034 method Methods 0.000 title claims abstract description 24
- 238000006477 desulfuration reaction Methods 0.000 claims abstract description 42
- 230000023556 desulfurization Effects 0.000 claims abstract description 42
- 239000012528 membrane Substances 0.000 claims abstract description 30
- 239000010802 sludge Substances 0.000 claims abstract description 22
- 239000000126 substance Substances 0.000 claims abstract description 19
- 238000001914 filtration Methods 0.000 claims abstract description 15
- 239000012530 fluid Substances 0.000 claims abstract description 15
- 239000002562 thickening agent Substances 0.000 claims abstract description 15
- 239000007788 liquid Substances 0.000 claims abstract description 13
- 238000000926 separation method Methods 0.000 claims abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 51
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 15
- 239000003546 flue gas Substances 0.000 claims description 15
- 238000006243 chemical reaction Methods 0.000 claims description 12
- 239000002699 waste material Substances 0.000 claims description 12
- 239000000779 smoke Substances 0.000 claims description 11
- 238000002425 crystallisation Methods 0.000 claims description 10
- 230000008025 crystallization Effects 0.000 claims description 10
- 208000028659 discharge Diseases 0.000 claims description 10
- 239000007789 gas Substances 0.000 claims description 10
- 238000012545 processing Methods 0.000 claims description 10
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 9
- 238000013459 approach Methods 0.000 claims description 9
- 230000003009 desulfurizing effect Effects 0.000 claims description 9
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 6
- 238000001704 evaporation Methods 0.000 claims description 6
- 230000008020 evaporation Effects 0.000 claims description 6
- VTHJTEIRLNZDEV-UHFFFAOYSA-L magnesium dihydroxide Chemical compound [OH-].[OH-].[Mg+2] VTHJTEIRLNZDEV-UHFFFAOYSA-L 0.000 claims description 6
- 239000000347 magnesium hydroxide Substances 0.000 claims description 6
- 229910001862 magnesium hydroxide Inorganic materials 0.000 claims description 6
- 238000009833 condensation Methods 0.000 claims description 5
- 230000005494 condensation Effects 0.000 claims description 5
- 230000018044 dehydration Effects 0.000 claims description 5
- 238000006297 dehydration reaction Methods 0.000 claims description 5
- 238000011033 desalting Methods 0.000 claims description 5
- 239000012267 brine Substances 0.000 claims description 4
- 239000003818 cinder Substances 0.000 claims description 4
- 238000011010 flushing procedure Methods 0.000 claims description 4
- 238000004064 recycling Methods 0.000 claims description 4
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 claims description 4
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims description 3
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 3
- 239000000920 calcium hydroxide Substances 0.000 claims description 3
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims description 3
- 238000000975 co-precipitation Methods 0.000 claims description 3
- 239000012141 concentrate Substances 0.000 claims description 3
- 230000001351 cycling effect Effects 0.000 claims description 3
- 238000006073 displacement reaction Methods 0.000 claims description 3
- 239000003814 drug Substances 0.000 claims description 3
- 238000010907 mechanical stirring Methods 0.000 claims description 3
- 238000012806 monitoring device Methods 0.000 claims description 3
- 239000013049 sediment Substances 0.000 claims description 3
- 239000000377 silicon dioxide Substances 0.000 claims description 3
- 239000011780 sodium chloride Substances 0.000 claims description 3
- 239000013589 supplement Substances 0.000 claims description 3
- 230000032258 transport Effects 0.000 claims description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 2
- 238000010521 absorption reaction Methods 0.000 claims description 2
- 229910052799 carbon Inorganic materials 0.000 claims description 2
- 238000012544 monitoring process Methods 0.000 claims description 2
- 238000003756 stirring Methods 0.000 claims description 2
- 230000000149 penetrating effect Effects 0.000 claims 1
- 239000010865 sewage Substances 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 230000007613 environmental effect Effects 0.000 description 3
- 238000007599 discharging Methods 0.000 description 2
- 150000003839 salts Chemical class 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 238000004065 wastewater treatment Methods 0.000 description 2
- 238000013019 agitation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-N carbonic acid Chemical compound OC(O)=O BVKZGUZCCUSVTD-UHFFFAOYSA-N 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000003643 water by type Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
-
- 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
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
-
- 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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
-
- 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
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
-
- 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
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
- C02F11/122—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using filter presses
-
- 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
-
- 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
- C02F2209/06—Controlling or monitoring parameters in water treatment pH
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
Landscapes
- 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
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.
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