CN109179832B - Public environmental protection factory for recycling industrial high-salinity wastewater fully based on thermal method - Google Patents
Public environmental protection factory for recycling industrial high-salinity wastewater fully based on thermal method Download PDFInfo
- Publication number
- CN109179832B CN109179832B CN201811039560.2A CN201811039560A CN109179832B CN 109179832 B CN109179832 B CN 109179832B CN 201811039560 A CN201811039560 A CN 201811039560A CN 109179832 B CN109179832 B CN 109179832B
- Authority
- CN
- China
- Prior art keywords
- water
- waste heat
- inlet
- outlet
- sewage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 59
- 238000004064 recycling Methods 0.000 title claims abstract description 42
- 230000007613 environmental effect Effects 0.000 title claims abstract description 17
- 239000002351 wastewater Substances 0.000 title claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 297
- 239000002918 waste heat Substances 0.000 claims abstract description 219
- 239000010865 sewage Substances 0.000 claims abstract description 122
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 56
- 239000003546 flue gas Substances 0.000 claims abstract description 56
- 150000003839 salts Chemical class 0.000 claims abstract description 47
- 238000001704 evaporation Methods 0.000 claims abstract description 36
- 239000012452 mother liquor Substances 0.000 claims abstract description 36
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims abstract description 34
- 230000008020 evaporation Effects 0.000 claims abstract description 34
- 238000011084 recovery Methods 0.000 claims abstract description 30
- 230000008569 process Effects 0.000 claims abstract description 28
- 238000010248 power generation Methods 0.000 claims abstract description 17
- 238000000746 purification Methods 0.000 claims abstract description 17
- 239000011780 sodium chloride Substances 0.000 claims abstract description 17
- 238000001035 drying Methods 0.000 claims abstract description 14
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 claims abstract description 13
- 238000000926 separation method Methods 0.000 claims abstract description 12
- 238000010438 heat treatment Methods 0.000 claims abstract description 10
- 239000003513 alkali Substances 0.000 claims abstract description 6
- 239000012528 membrane Substances 0.000 claims description 67
- 238000001223 reverse osmosis Methods 0.000 claims description 37
- 238000001816 cooling Methods 0.000 claims description 29
- 239000000498 cooling water Substances 0.000 claims description 25
- 239000000779 smoke Substances 0.000 claims description 20
- 238000001471 micro-filtration Methods 0.000 claims description 16
- 238000000108 ultra-filtration Methods 0.000 claims description 16
- 238000006477 desulfuration reaction Methods 0.000 claims description 14
- 230000023556 desulfurization Effects 0.000 claims description 14
- 230000002308 calcification Effects 0.000 claims description 13
- 239000007921 spray Substances 0.000 claims description 13
- 230000003647 oxidation Effects 0.000 claims description 11
- 238000007254 oxidation reaction Methods 0.000 claims description 11
- 238000001728 nano-filtration Methods 0.000 claims description 10
- 239000013078 crystal Substances 0.000 claims description 9
- 239000002910 solid waste Substances 0.000 claims description 8
- 238000007599 discharging Methods 0.000 claims description 7
- 238000002156 mixing Methods 0.000 claims description 7
- 238000003825 pressing Methods 0.000 claims description 6
- 230000008929 regeneration Effects 0.000 claims description 6
- 238000011069 regeneration method Methods 0.000 claims description 6
- 239000007787 solid Substances 0.000 claims description 5
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 4
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 4
- 230000003009 desulfurizing effect Effects 0.000 claims description 4
- 239000000428 dust Substances 0.000 claims description 4
- 238000005189 flocculation Methods 0.000 claims description 4
- 230000016615 flocculation Effects 0.000 claims description 4
- 239000004571 lime Substances 0.000 claims description 4
- 239000008267 milk Substances 0.000 claims description 4
- 210000004080 milk Anatomy 0.000 claims description 4
- 235000013336 milk Nutrition 0.000 claims description 4
- 239000007800 oxidant agent Substances 0.000 claims description 4
- 230000001590 oxidative effect Effects 0.000 claims description 4
- 238000000605 extraction Methods 0.000 claims description 3
- 239000008213 purified water Substances 0.000 claims description 3
- 238000004062 sedimentation Methods 0.000 claims description 3
- 238000005507 spraying Methods 0.000 claims description 3
- 150000001875 compounds Chemical class 0.000 claims 5
- XLYOFNOQVPJJNP-DYCDLGHISA-N deuterium hydrogen oxide Chemical compound [2H]O XLYOFNOQVPJJNP-DYCDLGHISA-N 0.000 claims 4
- 230000008676 import Effects 0.000 claims 2
- 239000003814 drug Substances 0.000 claims 1
- 239000003517 fume Substances 0.000 claims 1
- 238000002203 pretreatment Methods 0.000 claims 1
- 238000002425 crystallisation Methods 0.000 abstract description 3
- 230000008025 crystallization Effects 0.000 abstract description 3
- 239000004566 building material Substances 0.000 abstract description 2
- 238000004134 energy conservation Methods 0.000 abstract description 2
- 239000002994 raw material Substances 0.000 abstract description 2
- 230000001502 supplementing effect Effects 0.000 abstract 1
- 239000002131 composite material Substances 0.000 description 12
- 238000005265 energy consumption Methods 0.000 description 5
- 230000009467 reduction Effects 0.000 description 5
- 230000000712 assembly Effects 0.000 description 4
- 238000000429 assembly Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000002699 waste material Substances 0.000 description 4
- 239000003153 chemical reaction reagent Substances 0.000 description 3
- 239000002920 hazardous waste Substances 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 241000251468 Actinopterygii Species 0.000 description 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000003843 chloralkali process Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000000192 social effect Effects 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 230000026676 system process Effects 0.000 description 1
Images
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
- C01—INORGANIC CHEMISTRY
- C01D—COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM, RUBIDIUM, CAESIUM, OR FRANCIUM
- C01D3/00—Halides of sodium, potassium or alkali metals in general
- C01D3/04—Chlorides
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F11/00—Compounds of calcium, strontium, or barium
- C01F11/46—Sulfates
-
- 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
- C02F1/043—Details
-
- 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
- C02F1/048—Purification of waste water by 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
- 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
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/442—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by nanofiltration
-
- 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
- C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
-
- 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
- C02F1/72—Treatment of water, waste water, or sewage by oxidation
-
- 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
-
- 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
- C02F2303/10—Energy recovery
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
- Y02A20/131—Reverse-osmosis
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/50—Improvements relating to the production of bulk chemicals
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Materials Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
Abstract
A public environmental protection factory for recycling industrial high-salinity wastewater through full recycling based on a thermal method belongs to the technical field of industrial energy conservation and environmental protection. The whole system comprises four process plates, namely a thermal method sewage treatment and resource plate, a demineralized water plate, a boiler and heat recovery plate, a steam turbine power generation and waste heat recovery plate, adopts various waste heat resources as driving heat sources of a sewage evaporation and crystallization device, and realizes evaporation concentration decrement, thermal method evaporation and high-purity salt separation on a thermal power plant and external public sewage, wherein sensible heat of high-grade steam or high-temperature water or a high-temperature section of flue gas for heating a deaerator, process water, heat network backwater and the like is used for waste heat evaporation crystallization, purification and mother liquor drying, and secondary steam waste heat at the sewage side is recycled for preheating a heating object; the waste heat of the steam turbine condenser and the waste heat of the flue gas are used for negative pressure waste heat evaporation and concentration, the recovered clear water can be used for supplementing water of a demineralized water source, sodium chloride is used as a raw material of a chlor-alkali plant and the like, and calcium sulfate and the like can be used as building materials.
Description
Technical Field
The invention relates to a public environment-friendly factory for recycling industrial high-salinity wastewater fully based on a thermal method, belonging to the technical field of industrial energy conservation and environmental protection.
Background
At present, most industries including thermal power plants or heat source plants need to discharge a large amount of sewage, particularly industrial high-salinity wastewater, seriously pollute the environment, particularly increasingly seriously pollute underground soil, underground water resources and the like, and are extremely difficult to recover. Although there are social calls, policy expectations and enterprise attempts to implement zero sewage discharge and water resource reuse, the most significant problems of the conventional treatment methods, including pretreatment + membrane treatment + MVR evaporation or multi-effect evaporation, are: the initial investment is huge (the investment requirement of each ton of sewage which is usually reduced to 1t/h is about 30-100 ten thousand yuan at present), the operation energy consumption and the operation and maintenance cost are too high (the treatment cost of each ton of sewage which is usually reduced to 30-90 yuan at present and is rarely lower than 20 yuan/t at present); meanwhile, a large amount of solid matters such as waste salt discharged in the sewage zero discharge process are generally treated as hazardous wastes, the hazardous wastes are required to be treated according to legal regulations, and the comprehensive treatment cost including treatment cost, environmental protection tax and the like is about 4000-8000 yuan/t. Therefore, the comprehensive investment and operation and maintenance costs are high whether zero discharge of sewage or waste salt disposal, and if the whole society starts to implement and strictly perform, the general view of the industry is as follows: most industrial enterprises with more sewage discharge are forced to stop production and break production.
Therefore, many similar industry enterprises and policy choices face a dilemma proposition, namely, whether "jin shan yin shan", or "green water qingshan"? Is there a possibility that both fish and bear paw could be achieved, and both enterprises and society could benefit? One possible technical approach is to: the waste heat of industrial enterprises such as thermal power plants is adopted to replace a large amount of high-grade energy inevitably consumed in the process flows of zero discharge of sewage and waste salt recycling as a driving heat source, so that the consumption of artificial energy and the energy operating cost of the sewage can be greatly reduced, the flow of comprehensive treatment and recycling of the sewage can be shortened, the heat exchange strength is improved, the consumption of heat exchange materials is reduced, and the total initial investment is obviously reduced through efficient optimization design of a heat exchange process. According to the technical solution described above, the technical route is analyzed as follows, taking a thermal power plant as an example.
Boiler exhaust smoke of a thermal power plant or a heat source plant is divided into a higher temperature range (which is 1-2 percent of the comprehensive thermal efficiency of the thermal power plant) and a lower temperature range (which is 9-12 percent of the comprehensive thermal efficiency of the thermal power plant), and a large amount of low-grade waste heat can be provided for evaporation concentration and reduction of sewage; the exhaust steam condenser of the steam turbine can be provided with a low-vacuum circulating water heat supply mode and provides a large amount of low-grade waste heat (which is 20-60 percent of the comprehensive heat efficiency of the thermal power plant) for evaporation concentration and reduction of sewage; the water inlet heating steam of the deaerator can provide a large amount of high-grade waste heat (which is 5-9 percent of the comprehensive thermal efficiency of the thermal power plant) for evaporation concentration and reduction of sewage in an energy cascade utilization mode; the backwater heating steam of the heat supply network for central heating in winter can provide a large amount of high-grade waste heat (10-60 percent of the comprehensive thermal efficiency of the thermal power plant) for evaporating, concentrating and reducing sewage in an energy cascade utilization mode; if other process water needs to be heated, the inlet water heating steam can provide a large amount of high-grade waste heat (10-60 percent of the comprehensive thermal efficiency of the thermal power plant) for evaporation concentration and reduction of the sewage in an energy cascade utilization mode. By utilizing the waste heat heating and gradient energy utilization modes, the heat quantity for evaporating and crystallizing the sewage can reach 20-80% of the heat efficiency of the thermal power plant, namely the comprehensive heat utilization efficiency of the whole thermal power plant can even reach 110-170%. When the waste heat utilization mode is adopted for zero discharge of sewage, the incremental energy consumption is almost negligible except for the power consumption of a water pump, so that the energy cost for zero discharge of sewage is mainly the running electricity cost of the water pump in the process.
If the average power consumption per ton of water treatment is 3-4 kWh, if the average power price per ton of thermal power plant is 0.4 yuan/kWh, the energy cost per ton of sewage treatment is only about 1.2-1.6 yuan/t, if the average power price per ton of industrial enterprise is 2.0-3.0 yuan/t; the comprehensive operation cost including other operation and maintenance costs is estimated to be about 3-6 yuan/t; compared with the ton sewage comprehensive cost of the prior method for realizing the zero discharge of the sewage, the method is reduced by one order of magnitude. The method provides a technically and economically feasible technical foundation for solving the problems of comprehensive treatment of a large amount of sewage generated by thermal power plants and more industries and great social environmental protection.
Disclosure of Invention
The invention aims at zero sewage discharge and water resource and inclusion resource recovery of a large amount of produced sewage, particularly industrial high-salinity wastewater in the thermal power plant and various industrial enterprises, adopts a thermal method-based sewage discharge and resource recovery technology, carries out evaporation concentration reduction, thermal method evaporation, salt separation crystallization and purification on the industrial sewage in various waste heat driving modes, and continuously separates chloride ions, suspended matters, high-valence ions, heavy metals and the like in the industrial sewage from circulation to realize the recovery of the water resource and the inclusion material resource, wherein the recovered water resource can be used for water source water replenishing, heat network water replenishing and the like of a desalted water making process of the thermal power plant and other factories; the recovered high-purity sodium chloride is used as a raw material for downstream plants such as a chlor-alkali plant, and the recovered calcium sulfate and the like can be used as building materials.
The specific description of the invention is: a public environmental protection factory for recycling industrial high-salt wastewater fully based on a thermal method comprises four process plates, namely a thermal method sewage treatment and recycling plate A1, a demineralized water plate A2, a boiler and heat recycling plate A3, a turbine power generation and waste heat recycling plate A4 and an auxiliary pipeline facility between the plate and the plate, and is characterized in that a condenser 42 of the turbine power generation and waste heat recycling plate A4 adopts a low vacuum heat exchange structure, the boiler and heat recycling plate A3 comprises a boiler body 33 and a conventional auxiliary machine system thereof, a flue gas sewage evaporator 37 and a boiler flue gas waste heat recycling assembly 30 based on boiler inlet air steam heat-carrying cycle, an inlet of demineralized water P1 of a multi-medium filter 1 of the thermal method sewage treatment and recycling plate A1 is connected with an outlet of demineralized water concentrated water P1 of the demineralized water plate A2, an inlet of cooling tower sewage P2 of the multi-medium filter 1 is connected with a cooling tower waste heat recycling plate of the turbine 4 and a cooling tower plate of the power generation plate A4 The outlet of the cooling tower sewage P2 is connected, the outlet of the suspended high-concentration water G9 of the multi-medium filter 1 is connected with the raw water inlet of the flocculation sedimentation tank 21, the filter-pressing water inlet of the multi-medium filter 1 is connected with the filter-pressing water outlet of the first filter press 20, the treated water outlet of the multi-medium filter 1 is connected with the raw water inlet of the first-stage reverse osmosis membrane 2, the outlet of the first-stage clear water D5 of the first-stage reverse osmosis membrane 2 is connected with the inlet of the regenerated raw water D of the desalted water reverse osmosis membrane 23 of the desalted water plate A2, the treated water outlet of the first-stage reverse osmosis membrane 2 is connected with the raw water inlet of the second-stage reverse osmosis membrane 3, the outlet of the second-stage clear water D4 of the second-stage reverse osmosis membrane 3 is connected with the inlet of the regenerated raw water D of the desalted water 23, the treated water outlet of, A second-stage reverse osmosis membrane 3, an ultrafiltration/microfiltration membrane treatment device 6, a second filter press 15, a source water pretreatment tank 22 from a demineralized water plate A2, a demineralized water reverse osmosis membrane 23, a high-concentration drainage outlet from a boiler and a desulfurizing tower 34 of a heat recovery plate A3, an outlet of high-concentration sewage G1 of the mixed water pretreatment tank 4 is connected with a raw water inlet of the second filter press 15, a treated water outlet of the mixed water pretreatment tank 4 is connected with a raw water inlet of an oxidation calcification tank 5, the oxidation calcification tank 5 is provided with an oxidant O inlet, a feeding port of lime milk and a composite reagent F, a discharging port of calcium sulfate K3, a discharging port of other solid salts K5 and a treated water outlet, the treated water outlet of the oxidation calcification tank 5 is connected with the raw water inlet of the ultrafiltration/microfiltration membrane treatment device 6, the ultrafiltration/microfiltration membrane treatment device 6 is provided with a feeding port of alkali liquor CH, An outlet of regenerated sewage G3 and a treated water outlet, a treated water outlet of an ultrafiltration/microfiltration membrane treatment device 6 is connected with a raw water inlet of a nanofiltration membrane salt separation device 7, an outlet of high-concentration water H of the nanofiltration membrane salt separation device 7 is connected with an inlet of high-concentration water H of an oxidation calcification pool 5, a purified water outlet of the nanofiltration membrane salt separation device 7 is connected with a raw water inlet of a waste heat evaporation crystallizer 8, the waste heat evaporation crystallizer 8 is provided with an inlet of a waste heat source J1, an outlet of waste heat source effluent J2, a salt outlet of industrial sodium chloride K1, an outlet of secondary sewage steam L and an outlet of mother liquor G4, wherein an outlet of secondary sewage steam L of the waste heat evaporation crystallizer 8 is connected with high-temperature side inlets of waste heat recoverer components 10 and 11, and high-temperature side condensed water outlets of the waste heat recoverers 10 and 11 are communicated with an inlet of a regenerated raw water reverse osmosis membrane D of desalte, the treated water outlet of the ultrafiltration/microfiltration membrane treatment device 6 is also connected with the raw water inlet of a negative pressure waste heat evaporator 14, the negative pressure waste heat evaporator 14 is provided with an inlet of a first low-temperature waste heat source R1, an outlet of a first low-temperature waste heat source effluent R2, an inlet of a second low-temperature waste heat source R3, an outlet of a second low-temperature waste heat source effluent R4, an outlet of low-pressure sewage secondary steam Ld and an outlet of low-pressure mother liquor G5, wherein the outlet of the low-pressure mother liquor G5 is connected with the raw water inlet of a mother liquor drying waste heat evaporator 13, the mother liquor drying waste heat evaporator 13 is provided with an inlet of a waste heat source J1, an outlet of waste heat source effluent J2 and a discharge outlet of mother liquor drying solid waste K6, the outlet of the low-pressure sewage secondary steam Ld of the negative pressure waste heat evaporator 14 is connected with the steam inlet of a circulating cooling water heat exchanger 12, the inlet of cooling water inlet N1 of the circulating cooling water heat, the outlet of the cooling outlet water N2 of the circulating cooling water heat exchanger 12 is connected with the cooling water inlet of the cooling tower 44, and the outlet of the low-pressure clean water D3 of the circulating cooling water heat exchanger 12 is communicated with the inlet of the regeneration raw water D of the desalted water reverse osmosis membrane 23. The salt outlet of the industrial-grade sodium chloride K1 of the waste heat evaporation crystallizer 8 is communicated with the feed inlet of the crystal salt re-purification device 9, and the crystal salt re-purification device 9 is provided with an inlet of a waste heat source J1, an outlet of waste heat source effluent J2 and a discharge outlet of high-purity industrial-grade sodium chloride K4. The inlet of the high-temperature smoke Y of the flue gas sewage evaporator 37 of the boiler and heat recovery plate A3 is connected with the flue of the high-temperature smoke Y from the boiler or the dust remover, the outlet of the medium-temperature flue gas Y0 of the flue gas sewage evaporator 37 is connected with the inlet of the desulfurization smoke inlet Y1 of the desulfurization tower 34, the inlet of the mother liquor G4 for spraying of the flue gas sewage evaporator 37 is communicated with the outlet of the mother liquor G4 of the waste heat evaporation crystallizer 8, or the outlet of the low-pressure mother liquor G5 of the negative pressure waste heat evaporator 14 is communicated, or the outlets of other high-concentration waste water sources are communicated, and the flue gas sewage evaporator 37 is also provided with a discharge port of the flue gas drying solid waste K7. The boiler flue gas waste heat recovery assembly 30 comprises a boiler flue gas waste heat composite spray tower 31, a flue gas inlet of the boiler flue gas waste heat composite spray tower 31 is communicated with an outlet of desulfurization smoke discharge Y2 of a desulfurization tower 34, an outlet of flue gas waste heat high-temperature water Rg1 of the boiler flue gas waste heat composite spray tower 31 is communicated with an inlet of a first low-temperature waste heat source R1 of a negative pressure waste heat evaporator 14, and an inlet of flue gas waste heat low-temperature water Rh2 of the boiler flue gas waste heat composite spray tower 31 is communicated with an outlet of first low-temperature waste heat source water R2.
An outlet of circulating water outlet Rg3 of a condenser 42 of the steam turbine power generation and waste heat recovery plate A4 is connected with a cooling water inlet of the cooling tower 44 and is also communicated with an inlet of a second low-temperature waste heat source R3 of the negative pressure waste heat evaporator 14, and an inlet of circulating water inlet Rh4 of the condenser 42 is also communicated with an outlet of second low-temperature waste heat source outlet R4 besides being connected with a cooling water outlet of the cooling tower 44.
The steam extraction outlet of the steam turbine 43 of the steam turbine power generation and waste heat recovery board A4 is connected with the steam inlet of the feed water heater assembly 40, the steam inlet of the deaerator 41 and the high temperature side inlet of the hot water heater 46 of the heating or process heat consumer, and is also communicated with the inlet of the waste heat source J1 of the waste heat evaporative crystallizer 8, or is communicated with the inlet of the waste heat source J1 of the crystallized salt re-purification device 9, or is communicated with the inlet of the waste heat source J1 of the mother liquor dried waste heat evaporator 13, the condensed water inlet of the deaerator 41 is communicated with the condensed water outlet of the condenser 42, the outlet of the waste heat source effluent J2 of the hot water heater 46, and is also communicated with the outlets of the heat source effluent J2 from the waste heat evaporative crystallizer 8, the crystallized salt re-purification device 9 and the dried waste heat evaporator 13, and is also communicated with the heated effluent M2 of the deaerator and the process water heater 11 in the waste heat recovery assemblies 10 and 11, the inlet of the heated inlet water M1 of the deaerator and process water waste heat heater 11 is communicated with the condensed water outlet of the condenser 42.
The waste heat recoverer assemblies 10 and 11 comprise a heat supply network backwater waste heat heater 10, an inlet of heat supply network backwater inlet water M3 of the heat supply network backwater waste heat heater 10 is communicated with a water inlet pipe of low-temperature backwater Rh of a hot water heater 46, an outlet of the heat supply network backwater inlet water M4 of the heat supply network backwater waste heat heater 10 is communicated with an inlet of the low-temperature backwater Rh of the hot water heater 46, an inlet of a high-temperature side of the heat supply network backwater waste heat heater 10 is connected with an outlet of sewage secondary steam L of a waste heat evaporation crystallizer 8, and an outlet of a high-temperature side second drain D2 of the heat supply network backwater waste heat heater 10 is communicated with an inlet of a raw water regeneration D of a desalted water reverse osmosis membrane 23 after being connected with an outlet of a deaerator and a high.
The multi-media filter 1 of the thermal sewage treatment and resource block a1 is further provided with an inlet for externally connecting concentrated water Pw, which is communicated with a water inlet pipeline of a lower-concentration sewage source in the public sewage inlet water outside the thermal power plant, the water mixing pretreatment tank 4 of the thermal sewage treatment and resource block a1 is further provided with an inlet for externally connecting high-concentration raw water Gw, which is communicated with a water inlet pipeline of a higher-concentration sewage source in the public sewage inlet water outside the thermal power plant, and the crystal salt re-purification device 9 of the thermal sewage treatment and resource block a1 is further provided with a feed inlet for externally connecting primary industrial salt Kw outside the thermal power plant.
The invention solves the problems of low-cost comprehensive treatment and resource utilization of a large amount of sewage, particularly high-salt wastewater, generated in the production process of many industrial enterprises such as thermal power plants and the like, saves the water replenishing requirement through the reuse of clean water, recovers resources such as high-purity industrial-grade sodium chloride, calcium sulfate and the like, and greatly saves the consumption of artificial energy and the operating cost thereof. Compared with the conventional sewage zero discharge and dangerous waste salt purification and recovery technology, the method can reduce the artificial energy requirement by about 90 percent, greatly reduce the energy consumption and reduce the operation cost by one order of magnitude, and becomes a brand new technical mode of comprehensive sewage treatment and resource recovery which is built and used by most thermal power plants and related industrial users. The invention can be centered on the thermal power plant and the power system process and the thermal process thereof, realizes the mode conversion from a high-pollution and high-discharge mode to a clean production type green power plant mode with zero discharge of process sewage and obviously reduced water resource consumption, particularly can be used as a basic technical process of an industrial park and even a whole-society integrated large environmental protection system, bears a public environmental protection plant and a comprehensive treatment center for comprehensively treating public sewage, and has technical and economic values and environmental and social effects.
The method obviously reduces the operation energy consumption and the cost for realizing the zero discharge of the sewage and the high-efficiency resource utilization, is particularly suitable for the combined operation of a thermal power plant or a heat source plant and a chlor-alkali process, and can further improve the industrial matching completeness and the technical and economic effects of the comprehensive treatment. Meanwhile, the technical method, the device and the engineering implementation scheme thereof designed by the invention can be further popularized to the comprehensive treatment of sewage of enterprises in other industries with similar high energy consumption and high waste heat discharge, even to other relevant hazardous waste treatment processes, and have more universal industrial application value and social and economic benefits.
Drawings
FIG. 1 is a schematic diagram of the system of the present invention.
The parts in fig. 1 are numbered and named as follows. A multi-medium filter 1, a primary reverse osmosis membrane 2, a secondary reverse osmosis membrane 3, a water mixing pretreatment tank 4, an oxidation calcification tank 5, an ultrafiltration/microfiltration membrane treatment device 6, a nanofiltration membrane salt separation device 7, a waste heat evaporation crystallizer 8, a crystallized salt re-purification device 9, a heat supply network backwater waste heat heater 10, a deaerator and process water waste heat heater 11, a circulating cooling water heat exchanger 12, a mother liquor drying waste heat evaporator 13, a negative pressure waste heat evaporator 14, a second filter press 15, a first filter press 20, a flocculation precipitation tank 21, a water source water pretreatment tank 22, a desalted water reverse osmosis membrane 23, a desalted water deep treatment device 24, a boiler flue gas waste heat recovery component 30, a boiler flue gas waste heat composite spray tower 31, a blower 32, a boiler body 33, a desulfurization tower 34, a flue gas dust remover 35, a draft fan 36, a flue gas sewage evaporator 37, a feed water heater, A deaerator 41, a condenser 42, a cooling tower 44, a generator 45, a hot water heater 46, a thermal process sewage treatment and recycling block A1, a demineralized water block A2, a boiler and heat recovery block A3, a steam turbine power generation and waste heat recovery block A4, desulfurized circulating water B, alkali liquor CH, regenerated raw water D, high-temperature side first drain water D1, high-temperature side second drain water D2, low-pressure clean water D3, secondary clean water D4, primary clean water D5, lime milk and a composite reagent F, high-concentration raw water G, high-concentration sewage G1, desulfurized sewage G2, regenerated sewage G3, mother liquor G4, low-pressure mother liquor G5, primary membrane regenerated sewage G6, secondary membrane regenerated sewage G7, demineralized water regenerated sewage G8, suspended high-concentration water G9, external high-concentration raw water Gw, high-concentration water H, a heat source J1, waste heat source effluent J2, industrial grade sodium chloride K69556, an external high-purity sodium chloride K828453, industrial grade sodium chloride K8653, high-purity sodium chloride 3, and industrial sodium chloride K8653, Other solid salt K5, mother liquor dried solid waste K6, flue gas dried solid waste K7, public external primary industrial salt Kw, sewage secondary steam L, low-pressure sewage secondary steam Ld, heated inlet water M1, heated outlet water M2, heat grid return water inlet water M3, heat grid return water inlet water outlet M4, cooling inlet water N1, cooling outlet water N2, oxidant O, desalted water concentrated water P1, cooling tower drain water P2, external concentrated water Pw, first low-temperature waste heat source R1, first low-temperature waste heat source outlet water R2, second low-temperature waste heat source R3, second low-temperature waste heat source outlet water R4, heat grid high-temperature water supply Rh, low-temperature return water Rh, flue gas waste heat high-temperature water 1, flue gas waste heat low-temperature Rh2, circulating water outlet water 3, circulating water inlet water Rh4, high-temperature flue gas source water S, high-temperature flue gas Y6324, desulfurized flue gas Y5928, desulfurized flue gas Y599 and flue gas exhausted smoke.
Detailed Description
FIG. 1 is a schematic diagram of the system of the present invention.
The specific embodiment of the invention is as follows: a public environmental protection factory for recycling industrial high-salt wastewater fully based on a thermal method comprises four process plates, namely a thermal method sewage treatment and recycling plate A1, a demineralized water plate A2, a boiler and heat recycling plate A3, a turbine power generation and waste heat recycling plate A4 and an auxiliary pipeline facility between the plate and the plate, and is characterized in that a condenser 42 of the turbine power generation and waste heat recycling plate A4 adopts a low vacuum heat exchange structure, the boiler and heat recycling plate A3 comprises a boiler body 33 and a conventional auxiliary machine system thereof, a flue gas sewage evaporator 37 and a boiler flue gas waste heat recycling assembly 30 based on boiler inlet air steam heat-carrying cycle, an inlet of demineralized water P1 of a multi-medium filter 1 of the thermal method sewage treatment and recycling plate A1 is connected with an outlet of demineralized water concentrated water P1 of the demineralized water plate A2, an inlet of cooling tower sewage P2 of the multi-medium filter 1 is connected with a cooling tower waste heat recycling plate of the turbine 4 and a cooling tower plate of the power generation plate A4 The outlet of the cooling tower sewage P2 is connected, the outlet of the suspended high-concentration water G9 of the multi-medium filter 1 is connected with the raw water inlet of the flocculation sedimentation tank 21, the filter-pressing water inlet of the multi-medium filter 1 is connected with the filter-pressing water outlet of the first filter press 20, the treated water outlet of the multi-medium filter 1 is connected with the raw water inlet of the first-stage reverse osmosis membrane 2, the outlet of the first-stage clear water D5 of the first-stage reverse osmosis membrane 2 is connected with the inlet of the regenerated raw water D of the desalted water reverse osmosis membrane 23 of the desalted water plate A2, the treated water outlet of the first-stage reverse osmosis membrane 2 is connected with the raw water inlet of the second-stage reverse osmosis membrane 3, the outlet of the second-stage clear water D4 of the second-stage reverse osmosis membrane 3 is connected with the inlet of the regenerated raw water D of the desalted water 23, the treated water outlet of, A second-stage reverse osmosis membrane 3, an ultrafiltration/microfiltration membrane treatment device 6, a second filter press 15, a source water pretreatment tank 22 from a demineralized water plate A2, a demineralized water reverse osmosis membrane 23, a high-concentration drainage outlet from a boiler and a desulfurizing tower 34 of a heat recovery plate A3, an outlet of high-concentration sewage G1 of the mixed water pretreatment tank 4 is connected with a raw water inlet of the second filter press 15, a treated water outlet of the mixed water pretreatment tank 4 is connected with a raw water inlet of an oxidation calcification tank 5, the oxidation calcification tank 5 is provided with an oxidant O inlet, a feeding port of lime milk and a composite reagent F, a discharging port of calcium sulfate K3, a discharging port of other solid salts K5 and a treated water outlet, the treated water outlet of the oxidation calcification tank 5 is connected with the raw water inlet of the ultrafiltration/microfiltration membrane treatment device 6, the ultrafiltration/microfiltration membrane treatment device 6 is provided with a feeding port of alkali liquor CH, An outlet of regenerated sewage G3 and a treated water outlet, a treated water outlet of an ultrafiltration/microfiltration membrane treatment device 6 is connected with a raw water inlet of a nanofiltration membrane salt separation device 7, an outlet of high-concentration water H of the nanofiltration membrane salt separation device 7 is connected with an inlet of high-concentration water H of an oxidation calcification pool 5, a purified water outlet of the nanofiltration membrane salt separation device 7 is connected with a raw water inlet of a waste heat evaporation crystallizer 8, the waste heat evaporation crystallizer 8 is provided with an inlet of a waste heat source J1, an outlet of waste heat source effluent J2, a salt outlet of industrial sodium chloride K1, an outlet of secondary sewage steam L and an outlet of mother liquor G4, wherein an outlet of secondary sewage steam L of the waste heat evaporation crystallizer 8 is connected with high-temperature side inlets of waste heat recoverer components 10 and 11, and high-temperature side condensed water outlets of the waste heat recoverers 10 and 11 are communicated with an inlet of a regenerated raw water reverse osmosis membrane D of desalte, the treated water outlet of the ultrafiltration/microfiltration membrane treatment device 6 is also connected with the raw water inlet of a negative pressure waste heat evaporator 14, the negative pressure waste heat evaporator 14 is provided with an inlet of a first low-temperature waste heat source R1, an outlet of a first low-temperature waste heat source effluent R2, an inlet of a second low-temperature waste heat source R3, an outlet of a second low-temperature waste heat source effluent R4, an outlet of low-pressure sewage secondary steam Ld and an outlet of low-pressure mother liquor G5, wherein the outlet of the low-pressure mother liquor G5 is connected with the raw water inlet of a mother liquor drying waste heat evaporator 13, the mother liquor drying waste heat evaporator 13 is provided with an inlet of a waste heat source J1, an outlet of waste heat source effluent J2 and a discharge outlet of mother liquor drying solid waste K6, the outlet of the low-pressure sewage secondary steam Ld of the negative pressure waste heat evaporator 14 is connected with the steam inlet of a circulating cooling water heat exchanger 12, the inlet of cooling water inlet N1 of the circulating cooling water heat, the outlet of the cooling outlet water N2 of the circulating cooling water heat exchanger 12 is connected with the cooling water inlet of the cooling tower 44, and the outlet of the low-pressure clean water D3 of the circulating cooling water heat exchanger 12 is communicated with the inlet of the regeneration raw water D of the desalted water reverse osmosis membrane 23. The salt outlet of the industrial-grade sodium chloride K1 of the waste heat evaporation crystallizer 8 is communicated with the feed inlet of the crystal salt re-purification device 9, and the crystal salt re-purification device 9 is provided with an inlet of a waste heat source J1, an outlet of waste heat source effluent J2 and a discharge outlet of high-purity industrial-grade sodium chloride K4. The inlet of the high-temperature smoke Y of the flue gas sewage evaporator 37 of the boiler and heat recovery plate A3 is connected with the flue of the high-temperature smoke Y from the boiler or the dust remover, the outlet of the medium-temperature flue gas Y0 of the flue gas sewage evaporator 37 is connected with the inlet of the desulfurization smoke inlet Y1 of the desulfurization tower 34, the inlet of the mother liquor G4 for spraying of the flue gas sewage evaporator 37 is communicated with the outlet of the mother liquor G4 of the waste heat evaporation crystallizer 8, or the outlet of the low-pressure mother liquor G5 of the negative pressure waste heat evaporator 14 is communicated, or the outlets of other high-concentration waste water sources are communicated, and the flue gas sewage evaporator 37 is also provided with a discharge port of the flue gas drying solid waste K7. The boiler flue gas waste heat recovery assembly 30 comprises a boiler flue gas waste heat composite spray tower 31, a flue gas inlet of the boiler flue gas waste heat composite spray tower 31 is communicated with an outlet of desulfurization smoke discharge Y2 of a desulfurization tower 34, an outlet of flue gas waste heat high-temperature water Rg1 of the boiler flue gas waste heat composite spray tower 31 is communicated with an inlet of a first low-temperature waste heat source R1 of a negative pressure waste heat evaporator 14, and an inlet of flue gas waste heat low-temperature water Rh2 of the boiler flue gas waste heat composite spray tower 31 is communicated with an outlet of first low-temperature waste heat source water R2.
An outlet of circulating water outlet Rg3 of a condenser 42 of the steam turbine power generation and waste heat recovery plate A4 is connected with a cooling water inlet of the cooling tower 44 and is also communicated with an inlet of a second low-temperature waste heat source R3 of the negative pressure waste heat evaporator 14, and an inlet of circulating water inlet Rh4 of the condenser 42 is also communicated with an outlet of second low-temperature waste heat source outlet R4 besides being connected with a cooling water outlet of the cooling tower 44.
The steam extraction outlet of the steam turbine 43 of the steam turbine power generation and waste heat recovery board A4 is connected with the steam inlet of the feed water heater assembly 40, the steam inlet of the deaerator 41 and the high temperature side inlet of the hot water heater 46 of the heating or process heat consumer, and is also communicated with the inlet of the waste heat source J1 of the waste heat evaporative crystallizer 8, or is communicated with the inlet of the waste heat source J1 of the crystallized salt re-purification device 9, or is communicated with the inlet of the waste heat source J1 of the mother liquor dried waste heat evaporator 13, the condensed water inlet of the deaerator 41 is communicated with the condensed water outlet of the condenser 42, the outlet of the waste heat source effluent J2 of the hot water heater 46, and is also communicated with the outlets of the heat source effluent J2 from the waste heat evaporative crystallizer 8, the crystallized salt re-purification device 9 and the dried waste heat evaporator 13, and is also communicated with the heated effluent M2 of the deaerator and the process water heater 11 in the waste heat recovery assemblies 10 and 11, the inlet of the heated inlet water M1 of the deaerator and process water waste heat heater 11 is communicated with the condensed water outlet of the condenser 42.
The waste heat recoverer assemblies 10 and 11 comprise a heat supply network backwater waste heat heater 10, an inlet of heat supply network backwater inlet water M3 of the heat supply network backwater waste heat heater 10 is communicated with a water inlet pipe of low-temperature backwater Rh of a hot water heater 46, an outlet of the heat supply network backwater inlet water M4 of the heat supply network backwater waste heat heater 10 is communicated with an inlet of the low-temperature backwater Rh of the hot water heater 46, an inlet of a high-temperature side of the heat supply network backwater waste heat heater 10 is connected with an outlet of sewage secondary steam L of a waste heat evaporation crystallizer 8, and an outlet of a high-temperature side second drain D2 of the heat supply network backwater waste heat heater 10 is communicated with an inlet of a raw water regeneration D of a desalted water reverse osmosis membrane 23 after being connected with an outlet of a deaerator and a high.
The multi-media filter 1 of the thermal sewage treatment and resource block a1 is further provided with an inlet for externally connecting concentrated water Pw, which is communicated with a water inlet pipeline of a lower-concentration sewage source in the public sewage inlet water outside the thermal power plant, the water mixing pretreatment tank 4 of the thermal sewage treatment and resource block a1 is further provided with an inlet for externally connecting high-concentration raw water Gw, which is communicated with a water inlet pipeline of a higher-concentration sewage source in the public sewage inlet water outside the thermal power plant, and the crystal salt re-purification device 9 of the thermal sewage treatment and resource block a1 is further provided with a feed inlet for externally connecting primary industrial salt Kw outside the thermal power plant.
It should be noted that, the present invention provides a method for comprehensively solving the recycling problem of water resources and material resources of sewage of thermal power plants and the like by using a heat exchange method, a waste heat evaporation and energy gradient utilization method, and the like, and different specific implementation measures and different structure specific implementation devices can be provided according to the overall solution, the above specific implementation is only one of them, and any other similar simple deformation implementation modes, such as the type selection and number change of the waste heat recovery heat exchanger; the waste heat source type adopts low-pressure steam with the temperature lower than 100 ℃, positive-pressure steam with the temperature higher than the atmospheric pressure, or waste heat hot water, smoke and the like; only a part of the claims, but not all of the waste heat driven evaporation, or sewage pretreatment flow, or post-treatment flow, etc. are implemented; or the sewage pretreatment tank and the desulfurization and pollution discharge pretreatment tank are combined, and other treatment equipment or processes are simply combined or separately designed; or simply replacing membranes with different types, performances and qualities or other sewage treatment devices to perform sewage treatment in corresponding links; or other modifications and the like which can be considered by a person skilled in the art; or the technical mode can be applied to similar desulfurization water treatment and application occasions of other industries by the same or similar method, system and structure, and the technical mode falls into the protection scope of the invention.
Claims (5)
1. A public environmental protection factory for recycling industrial high-salt wastewater fully based on a thermal method comprises four process plates, namely a thermal method sewage treatment and recycling plate (A1), a demineralized water plate (A2), a boiler and heat recycling plate (A3), a turbine power generation and waste heat recycling plate (A4) and an auxiliary pipeline facility between the interior of the plate and the plate, and is characterized in that a condenser (42) of the turbine power generation and waste heat recycling plate (A4) adopts a low-vacuum heat exchange structure, the boiler and heat recycling plate (A3) comprises a boiler body (33) and a conventional auxiliary machine system thereof, a flue gas sewage evaporator (37) and a boiler flue gas waste heat recycling component (30) based on boiler inlet steam heat-carrying cycle, an inlet of demineralized water concentrated water (P1) of a multi-medium filter (1) of the thermal method sewage and recycling plate (A1) is connected with an outlet of the demineralized water concentrated water (P1) of the demineralized water (A2), the inlet of the cooling tower sewage (P2) of the multi-medium filter (1) is connected with the outlet of the cooling tower sewage (P2) of the cooling tower (44) of the steam turbine power generation and waste heat recovery plate (A4), the outlet of the suspended high concentrated water (G9) of the multi-medium filter (1) is connected with the raw water inlet of the flocculation sedimentation tank (21), the filter-pressing water inlet of the multi-medium filter (1) is connected with the filter-pressing water outlet of the first filter press (20), the treated water outlet of the multi-medium filter (1) is connected with the raw water inlet of the primary reverse osmosis membrane (2), the outlet of the primary clear water (D5) of the primary reverse osmosis membrane (2) is connected with the inlet of the regenerated raw water (D) of the desalted water (23) of the desalted plate (A2), the treated water outlet of the primary reverse osmosis membrane (2) is connected with the raw water inlet of the secondary reverse osmosis membrane (3), and the outlet of the secondary clear water (D4) of the secondary reverse osmosis membrane (3) is connected with the regenerated raw D) The inlet of the second-stage reverse osmosis membrane (3) is connected with the inlet of the high-concentration raw water (G) of the water mixing pretreatment pool (4), the inlet of the high-concentration raw water (G) is also respectively communicated with a high-concentration drainage outlet comprising a desulfurizing tower (34) from a first-stage reverse osmosis membrane (2), a second-stage reverse osmosis membrane (3), an ultrafiltration/microfiltration membrane treatment device (6) and a second filter press (15), a water source water pretreatment pool (22) from a demineralized water plate (A2), a demineralized water reverse osmosis membrane (23) and a boiler and heat recovery plate (A3), the outlet of the sewage discharge high-concentration water (G1) of the water mixing pretreatment pool (4) is connected with the raw water inlet of the second filter press (15), the treated water outlet of the water mixing pretreatment pool (4) is connected with the raw water inlet of the calcification pool (5), and the calcification pool (5) is provided with the inlet of an oxidant (O), The lime milk and compound medicament (F) feeding port, the calcium sulfate (K3) discharging port, the other solid salt (K5) discharging port and the treated water outlet, the treated water outlet of the calcification oxidation tank (5) is connected with the raw water inlet of the ultrafiltration/microfiltration membrane treatment device (6), the ultrafiltration/microfiltration membrane treatment device (6) is provided with a feeding port of alkali liquor (CH), the outlet of regenerated sewage (G3) and a treated water outlet, the treated water outlet of the ultrafiltration/microfiltration membrane treatment device (6) is connected with the raw water inlet of the nanofiltration membrane salt separation device (7), the outlet of high-concentration water (H) of the nanofiltration membrane salt separation device (7) is connected with the inlet of high-concentration water (H) of the calcification oxidation tank (5), the purified water outlet of the nanofiltration membrane salt separation device (7) is connected with the raw water inlet of the waste heat evaporation crystallizer (8), the waste heat evaporation crystallizer (8) is provided with the inlet of a waste heat source (J1), the waste heat source (J1, An outlet of waste heat source effluent (J2), an outlet of industrial-grade sodium chloride (K1), an outlet of sewage secondary steam (L) and an outlet of mother liquor (G4), wherein the outlet of the sewage secondary steam (L) of the waste heat evaporative crystallizer (8) is connected with high-temperature side inlets of waste heat recoverer components (10 and 11), a high-temperature side condensate outlet of the waste heat recoverer components (10 and 11) is communicated with an inlet of regenerated raw water (D) of a desalted water reverse osmosis membrane (23), a treated water outlet of an ultrafiltration/microfiltration membrane treatment device (6) is also connected with a raw water inlet of a negative pressure waste heat evaporator (14), the negative pressure waste heat evaporator (14) is provided with an inlet of a first low-temperature waste heat source (R1), an outlet of the first low-temperature waste heat source effluent (R2), an inlet of a second low-temperature waste heat source (R3), an outlet of the second low-temperature waste heat source effluent (R4), An outlet of low-pressure sewage secondary steam (Ld) and an outlet of low-pressure mother liquor (G5), wherein the outlet of the low-pressure mother liquor (G5) is connected with a raw water inlet of a mother liquor drying waste heat evaporator (13), the mother liquor drying waste heat evaporator (13) is provided with an inlet of a waste heat source (J1) and an outlet of waste heat source effluent (J2), a discharge hole of mother liquor dried solid waste (K6), an outlet of low-pressure sewage secondary steam (Ld) of a negative pressure waste heat evaporator (14) is connected with a steam inlet of a circulating cooling water heat exchanger (12), an inlet of cooling inlet water (N1) of the circulating cooling water heat exchanger (12) is connected with a cooling water outlet of a cooling tower (44), an outlet of cooling outlet water (N2) of the circulating cooling water heat exchanger (12) is connected with a cooling water inlet of the cooling tower (44), and an outlet of low-pressure clear water (D3) of the circulating cooling water heat exchanger (12) is communicated with an inlet of regeneration raw water (D) of a desalted water reverse osmosis membrane (23); the salt outlet of the industrial-grade sodium chloride (K1) of the waste heat evaporative crystallizer (8) is communicated with the feed inlet of the crystal salt repurification device (9), and the crystal salt repurification device (9) is provided with an inlet of a waste heat source (J1), an outlet of waste heat source effluent (J2) and a discharge outlet of high-purity industrial-grade sodium chloride (K4); the inlet of high-temperature smoke (Y) of a smoke sewage evaporator (37) of the boiler and heat recovery plate (A3) is connected with a flue of the high-temperature smoke (Y) from a boiler or a dust remover, the outlet of medium-temperature smoke (Y0) of the smoke sewage evaporator (37) is connected with the inlet of desulfurization inlet smoke (Y1) of a desulfurization tower (34), the inlet of mother liquor (G4) for spraying of the smoke sewage evaporator (37) is communicated with the outlet of mother liquor (G4) of a waste heat evaporation crystallizer (8), or the outlet of low-pressure mother liquor (G5) of a negative pressure waste heat evaporator (14) is communicated with the outlet of other high-concentration waste water sources, and the smoke sewage evaporator (37) is also provided with a dry discharge port of smoke solid waste (K7); boiler flue gas waste heat recovery subassembly (30) contain the compound spray column of boiler flue gas waste heat (31), the flue gas inlet of the compound spray column of boiler flue gas waste heat (31) communicates with each other with the export of the desulfurization of desulfurizing tower (34) of discharging fume (Y2), the export of the flue gas waste heat high temperature water (Rg1) of the compound spray column of boiler flue gas waste heat (31) communicates with each other with the import of the first low temperature waste heat source (R1) of negative pressure waste heat evaporimeter (14), the import of the flue gas waste heat low temperature water (Rh2) of the compound spray column of boiler flue gas waste heat (31) communicates with each other with the export of first low temperature waste heat source play water (R2).
2. The industrial high-salinity wastewater full-recycling public environmental protection plant based on the thermal method according to claim 1, characterized in that the outlet of the circulating water outlet (Rg3) of the condenser (42) of the steam turbine power generation and waste heat recovery block (a4) is connected with the inlet of the second low-temperature waste heat source (R3) of the negative pressure waste heat evaporator (14) in addition to the cooling water inlet of the cooling tower (44), and the inlet of the circulating water inlet (Rh4) of the condenser (42) is connected with the outlet of the cooling water of the cooling tower (44) and is also connected with the outlet of the second low-temperature waste heat source outlet (R4).
3. The industrial high-salinity wastewater full-recycling public environmental protection factory based on the thermal method according to claim 1, characterized in that the extraction outlet of the steam turbine (43) of the steam turbine power generation and waste heat recovery panel (A4) is connected with the inlet of the feed water heater assembly (40), the inlet of the deaerator (41) and the high-temperature side inlet of the hot water heater (46) of the heating or process heat user, and is also connected with the inlet of the waste heat source (J1) of the waste heat evaporation crystallizer (8), or is connected with the inlet of the waste heat source (J1) of the crystallized salt re-purification device (9), or is connected with the inlet of the waste heat source (J1) of the mother liquor waste heat drying evaporator (13), the condensed water inlet of the deaerator (41) is connected with the condensed water outlet of the condenser (42) and the outlet of the waste heat source effluent (J2) of the hot water heater (46), the waste heat recovery device is also communicated with an outlet of waste heat source effluent (J2) from a waste heat evaporation crystallizer (8), or a crystal salt re-purification device (9) and a mother liquor drying waste heat evaporator (13), and is also communicated with an outlet of heated effluent (M2) of a deaerator and a process water waste heat heater (11) in a waste heat recoverer assembly (10, 11), and an inlet of heated inlet water (M1) of the deaerator and the process water waste heat heater (11) is communicated with a condensed water outlet of a condenser (42).
4. The thermal-method-based industrial high-salinity wastewater full-recycling public environmental protection plant as claimed in claim 1, characterized in that the waste heat recoverer assembly (10, 11) comprises a heat net backwater waste heat heater (10), the inlet of the heat net backwater inlet water (M3) of the heat net backwater waste heat heater (10) is communicated with the inlet pipe of the low-temperature backwater (Rh) of the hot water heater (46), the outlet of the heat net backwater inlet water (M4) of the heat net backwater waste heat heater (10) is communicated with the inlet of the low-temperature backwater (Rh) of the hot water heater (46), the inlet of the high-temperature side of the heat net backwater waste heat heater (10) is connected with the outlet of the sewage secondary steam (L) of the waste heat evaporation crystallizer (8), the outlet of the second high-temperature side drain (D2) of the heat net backwater waste heat heater (10) is connected with the outlet of the first drain (D1) of the deaerator and process water waste heat heater (11), is communicated with the inlet of the regeneration raw water (D) of the desalted water reverse osmosis membrane (23).
5. The thermal-based industrial high-salinity wastewater full-recycling public environmental protection plant according to claim 1, characterized in that the multi-media filter (1) of the thermal sewage treatment and recycling block (a1) is further provided with an inlet for external concentrated water (Pw) which is communicated with the inlet pipe of the lower-concentration sewage source in the inlet water of the public sewage outside the thermal power plant, the water mixing pre-treatment tank (4) of the thermal sewage treatment and recycling block (a1) is further provided with an inlet for external concentrated raw water (Gw) which is communicated with the inlet pipe of the higher-concentration sewage source in the inlet water of the public sewage outside the thermal power plant, and the crystallized salt re-purification device (9) of the thermal sewage treatment and recycling block (a1) is further provided with an inlet for the common external primary industrial salt (Kw) from outside the thermal power plant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811039560.2A CN109179832B (en) | 2018-09-06 | 2018-09-06 | Public environmental protection factory for recycling industrial high-salinity wastewater fully based on thermal method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811039560.2A CN109179832B (en) | 2018-09-06 | 2018-09-06 | Public environmental protection factory for recycling industrial high-salinity wastewater fully based on thermal method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109179832A CN109179832A (en) | 2019-01-11 |
| CN109179832B true CN109179832B (en) | 2020-09-18 |
Family
ID=64915224
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811039560.2A Active CN109179832B (en) | 2018-09-06 | 2018-09-06 | Public environmental protection factory for recycling industrial high-salinity wastewater fully based on thermal method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109179832B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11855324B1 (en) | 2022-11-15 | 2023-12-26 | Rahul S. Nana | Reverse electrodialysis or pressure-retarded osmosis cell with heat pump |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110759409A (en) * | 2019-11-29 | 2020-02-07 | 大唐郓城发电有限公司 | Multiple-effect utilization system for urea hydrolysis process and working method thereof |
| CN111960438A (en) * | 2020-09-14 | 2020-11-20 | 西安交通大学 | Potassium extraction system and method based on biomass combustion fly ash |
| US11502323B1 (en) | 2022-05-09 | 2022-11-15 | Rahul S Nana | Reverse electrodialysis cell and methods of use thereof |
| US11502322B1 (en) | 2022-05-09 | 2022-11-15 | Rahul S Nana | Reverse electrodialysis cell with heat pump |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN209583869U (en) * | 2018-09-06 | 2019-11-05 | 清华大学 | A kind of sewage zero-discharge and resource recovering system based on the driving of steam power plant's waste heat |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1743284A (en) * | 2004-08-30 | 2006-03-08 | 徐宝安 | Sewage-refuse treatment clean-production system at the center of generating plant |
| CN101544437B (en) * | 2009-04-30 | 2011-04-27 | 河北工业大学 | Process method for recovering ammonium chloride and sodium chloride from waste water containing ammonium chloride and sodium chloride |
| WO2011102848A1 (en) * | 2010-02-17 | 2011-08-25 | Katana Energy Llc | Zero discharge water desalination plant with minerals extraction integrated with natural gas combined cycle power generation |
| MX2016006818A (en) * | 2013-11-25 | 2017-01-13 | Enviro Water Minerals Company Inc | System and mehtod for removing minerals from a brine using electrodialyis. |
| CN105174588B (en) * | 2015-10-19 | 2017-11-24 | 双良节能系统股份有限公司 | Coking industry desulfurization wastewater zero-discharge treatment system |
| CN105481157A (en) * | 2015-12-18 | 2016-04-13 | 王辛平 | Method for zero emission treatment of desulfurization waste water based on flue gas waste heat evaporation |
| CN107304090A (en) * | 2016-04-21 | 2017-10-31 | 广州市心德实业有限公司 | A kind of Resourceful treatment method for high-salinity wastewater of sodium chloride-containing and sodium sulphate |
| CN106477794B (en) * | 2016-11-16 | 2019-04-30 | 重庆大学 | The System and method for of desulfurization wastewater concentration and flue gas drying integrated treatment |
| CN107619144A (en) * | 2017-10-20 | 2018-01-23 | 侯新春 | A kind of high slat-containing wastewater divides salt process for reclaiming and system |
-
2018
- 2018-09-06 CN CN201811039560.2A patent/CN109179832B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN209583869U (en) * | 2018-09-06 | 2019-11-05 | 清华大学 | A kind of sewage zero-discharge and resource recovering system based on the driving of steam power plant's waste heat |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11855324B1 (en) | 2022-11-15 | 2023-12-26 | Rahul S. Nana | Reverse electrodialysis or pressure-retarded osmosis cell with heat pump |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109179832A (en) | 2019-01-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109179832B (en) | Public environmental protection factory for recycling industrial high-salinity wastewater fully based on thermal method | |
| CN109179833B (en) | Waste heat drive-based paper mill sewage zero-discharge and resource recovery method | |
| CN209583869U (en) | A kind of sewage zero-discharge and resource recovering system based on the driving of steam power plant's waste heat | |
| CN212269507U (en) | High-concentration wastewater zero discharge system for blast furnace slag flushing cleaning production and waste heat method in steel plant | |
| WO2018045708A1 (en) | Indirect air-cooling unit heat recovery and water treatment device and method | |
| CN111484180B (en) | Waste heat method recrystallization purification mode and system for zero-emission associated crystallization salt of sewage | |
| CN209797671U (en) | Clean production type paper mill based on thermal method sewage zero release and resource recovery | |
| CN113173674A (en) | High-salinity concentrated water recycling treatment system and method | |
| WO2018045709A1 (en) | Power plant seawater desalination treatment device and method | |
| CN209685495U (en) | It is a kind of using waste heat driving desulfurization wastewater recycling and crystal salt purification system | |
| CN217287198U (en) | MVR evaporation concentration system | |
| CN108483710B (en) | Comprehensive seawater utilization method and system | |
| CN101503257B (en) | Method and apparatus for recovering and treating ammonium nitrate condensate liquid wastewater | |
| CN114151990B (en) | Multifunctional multistage flash evaporation combined heat pump system for comprehensively utilizing solution in desulfurizing tower | |
| CN212222698U (en) | Industrial waste salt recrystallization purification system driven by waste heat | |
| CN215102628U (en) | Processing system of concentrated water resourceization of high salt | |
| CN210419326U (en) | High-efficient single-effect evaporation system of high salt waste water | |
| CN209338304U (en) | A kind of waste heat vaporation-type desulfurization wastewater Zero discharging system | |
| CN210885723U (en) | Nearly zero release processing system of incineration plant's leachate | |
| CN216445186U (en) | Heat pump heat supply and waste water evaporation crystallization integrated system driven by flue gas waste heat | |
| CN109179828B (en) | Fluorine chemical plant sewage zero discharge and resource recovery method based on waste heat driving | |
| CN112919565A (en) | Solar energy-hot spring-heat pump coupling multistage membrane distillation water treatment system and method | |
| CN111320220A (en) | Process and device for concentrating high-salinity wastewater by circularly stripping air or industrial gas | |
| CN216445187U (en) | Waste heat driven flash evaporation type desulphurization wastewater zero discharge device | |
| CN111392792A (en) | Steel plant waste heat method sewage zero discharge and blast furnace slag dechlorination purification method and system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |