CN213327189U - High salt wastewater treatment system that contains - Google Patents
High salt wastewater treatment system that contains Download PDFInfo
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- CN213327189U CN213327189U CN202021346526.2U CN202021346526U CN213327189U CN 213327189 U CN213327189 U CN 213327189U CN 202021346526 U CN202021346526 U CN 202021346526U CN 213327189 U CN213327189 U CN 213327189U
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Abstract
The utility model provides a high salt wastewater treatment system that contains, the system is including triple effect evaporation unit, buffer pool, hydrolysis acidification pond, anaerobism pond, good oxygen pond and the MBR membrane unit of pipeline intercommunication in proper order, the MBR unit includes the MBR membrane module, the inside perforation aeration equipment that is provided with of MBR unit, the setting of perforation aeration equipment is in MBR membrane module below, be provided with the packing layer in the hydrolysis acidification pond. The utility model discloses a high salt wastewater treatment system that contains does not have special requirement to the high salt waste water contains composition, can realize the continuous processing to most of high viscosity, high pollution, the high salt waste water that contains, area is less, and no secondary pollutant produces basically after handling, has technical feasibility, greatly reduced the separation cost, the recycle technique that also makes the high salt waste water that contains has obtained rapid development, considers from economic environmental protection angle, the utility model discloses a high salt wastewater treatment system that contains is very meaningful.
Description
Technical Field
The utility model relates to a waste water treatment equipment field, concretely relates to high salt effluent disposal system that contains.
Background
High COD, high salt content waste water is one of the waste water which is extremely difficult to treat in industrial waste water, and refers to waste water containing organic matter and at least Total Dissolved Solids (TDS) with the mass fraction of more than 3.5%. The high-salt-content wastewater has the characteristics of high salt content, complex salt content, easy scaling and corrosion phenomena, high organic matter concentration, difficult degradation and the like. Contains a large amount of organic pollutants, inorganic salts such as Cl-，SO4 2-，Na+，Ca2+And (3) plasma. The high-salt-content wastewater mainly comes from the industries such as coal chemical industry, medicine and pesticide, and has the characteristics of large discharge amount, wide source, high salt content, complex components and large difference of physicochemical properties of the high-salt-content wastewater generated in different industries.
Common high-salt-content wastewater treatment processes include electrolysis, ion exchange, biological treatment, membrane separation and the like. The high-salt-content wastewater has higher conductivity, the electrolysis method can effectively reduce COD in the wastewater but has high operation cost, the power consumption and the electrode metal consumption are higher when a large amount of wastewater is treated, and the separated precipitate is not easy to treat and utilize. The key point of the ion exchange method is that the ion exchange resin can be used as a pretreatment process to remove various metal ions, but solid suspended substances in the wastewater can block the resin, so that the ion exchange resin loses the effect. The biological treatment is mainly to improve the biological treatment effect of the high-salt wastewater by using halophilic bacteria. High-concentration salt substances have an inhibiting effect on microorganisms, and the treatment effect is not up to the standard. When the membrane separation method is used for treatment, most of soluble substances cannot be intercepted, the membrane is easily blocked and corroded by substances in the wastewater with high salt content, frequent cleaning or replacement is needed, the treatment cost is increased, the investment is high, the operation cost is high, the membrane pollution problem is prominent, the expected purification effect is difficult to achieve, and the requirement of large-scale application cannot be met.
In the traditional biological sewage treatment technology, mud-water separation is completed in a secondary sedimentation tank under the action of gravity, the separation efficiency depends on the sedimentation performance of activated sludge, the sedimentation performance is better, and the mud-water separation efficiency is higher. The sedimentation performance of the sludge depends on the operation condition of the aeration tank, the operation condition of the aeration tank must be strictly controlled for improving the sedimentation performance of the sludge, the application range of the device is limited, the sludge in the aeration tank can not maintain higher concentration, generally about 1.5-3.5g/l, due to the requirement of solid-liquid separation of a secondary sedimentation tank, the biochemical reaction rate is limited, the hydraulic retention time and the sludge age are mutually dependent, and the contradiction is formed between the increase of the volume load and the reduction of the sludge load. The system also generates a large amount of excess sludge in the operation process, and the disposal cost of the excess sludge accounts for 25 to 40 percent of the operation cost of the sewage treatment plant. The traditional activated sludge treatment system is also easy to have the sludge expansion phenomenon, the effluent contains suspended solids, and the effluent quality is deteriorated.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the weak point that prior art exists and provide a high salt wastewater treatment system that contains.
In order to achieve the above purpose, the utility model adopts the following technical scheme: the utility model provides a high salt wastewater treatment system, the system is including the triple effect evaporation unit, buffer pool, hydrolysis acidification pond, anaerobism pond, good oxygen pond and the MBR membrane unit of pipeline intercommunication in proper order, the MBR unit includes the MBR membrane module, the inside perforation aeration equipment that is provided with of MBR unit, the setting of perforation aeration equipment is in MBR membrane module below, be provided with the packing layer in the hydrolysis acidification pond.
The perforation aeration device is arranged below the MBR membrane component and used for cleaning the surface of the MBR membrane component to form internal circulating flow, the sludge mixed liquid scours the surface of the MBR membrane at a high speed under the action of blast aeration to promote the particles on the surface of the membrane to fall off, the perforation aeration device is also used for supplying aerobic biological oxygen, clear effluent is obtained through the treatment of the MBR unit, and biological flocs, suspended matters, pathogens, macromolecular soluble organic matters and the like are effectively intercepted by the MBR unit. The MBR unit is organically combined with the traditional biological wastewater treatment technology, so that the construction of a secondary sedimentation tank is omitted, the solid-liquid separation efficiency is greatly improved, the perforation aeration device is arranged in the MBR unit, the high microbial biomass in the MBR unit is maintained through the high-efficiency interception of the MBR membrane component, the concentration of active sludge and the appearance of special-effect bacteria (particularly advantageous flora) in sludge are increased through combining the aeration device, the biochemical reaction rate is improved, the sludge discharge is reduced, the membrane component of the MBR unit enables the macromolecular difficultly-degraded components in the sewage to have enough stay time in a system for treating the high-salt-content wastewater through the triple-effect evaporation separation, and the degradation efficiency of the difficultly-degraded organic matters is improved. The high-salt-content wastewater treatment system is combined with the hydrolysis acidification tank and the aerobic tank, a large amount of sludge and facultative microorganisms are adsorbed and intercepted through the packing layer in the hydrolysis acidification tank, the packing layer provides stable environment for the microorganisms to inhabit and propagate, the growth, the propagation and the falling of the microorganisms are influenced, the packing layer is a place where a biomembrane is contacted with wastewater, and can have a forced turbulent action on water flow, so that the wastewater can be redistributed, and under the biodegradation action, solid, macromolecules and organic matters which are not easy to biodegrade in the wastewater are degraded into micromolecule organic matters which are easy to biodegrade, so that the wastewater is treated in a subsequent treatment unit with less energy consumption and shorter retention time. Before the hydrolytic acidification tank is used for an aerobic tank treatment process, non-soluble organic matters in wastewater are mainly converted into soluble organic matters, macromolecular substances which are difficult to degrade are converted into small molecular substances which are easy to degrade, the biodegradability of the wastewater is improved, the subsequent aerobic treatment is facilitated, and the wastewater can carry out denitrification reaction on nitrate nitrogen in nitrified liquid which flows back in the hydrolytic acidification tank under the anoxic condition by utilizing the action of denitrifying bacteria to achieve the biological denitrification effect. The high-salt-content wastewater treatment system has no special requirements on the components contained in the high-salt-content wastewater, can realize continuous treatment on most of high-viscosity, high-pollution and high-salt-content wastewater, occupies a small area, basically produces no secondary pollutants after treatment, has technical feasibility, greatly reduces the separation cost, and rapidly develops the recycling technology of the high-salt-content wastewater.
Preferably, the perforated aeration device is a tubular microporous aerator.
Preferably, the triple-effect evaporation unit comprises a first-effect heater, a first-effect evaporator, a second-effect heater, a second-effect evaporator, a triple-effect heater, a triple-effect evaporator, a heat exchanger and a condenser which are sequentially communicated, a heat medium inlet of the heat exchanger is communicated with a steam outlet pipeline of the triple-effect evaporator, a heat medium outlet of the heat exchanger is communicated with the condenser, and a refrigerant outlet of the heat exchanger is communicated with a steam inlet pipeline of the first-effect evaporator.
The heat exchanger is arranged in the high-salt-content wastewater treatment system, steam generated by the evaporation of the three-effect evaporator is input into the one-effect evaporator after heat exchange of the heat exchanger, so that heat can be saved, the condensation load is reduced, and the problem of overheating of the one-effect evaporator is avoided.
Preferably, the packing layer in the hydrolysis acidification tank is a first high-efficiency biological packing layer, and the first high-efficiency biological packing layer comprises the following components in percentage by weight: 50-60% of main materials, 10-20% of corrosion inhibitor and 20-40% of nutrient components, wherein the main materials comprise the following components in percentage by weight: 50-70% of diatomite and 30-50% of activated carbon, wherein the corrosion inhibitor comprises the following components in percentage by weight: 20 to 30 percent of bentonite and 70 to 80 percent of ion exchange resin, wherein the nutrient components comprise 70 to 80 percent of starch, 10 to 20 percent of glucose, 5 to 10 percent of urea and 2 to 5 percent of diammonium phosphate.
According to the high-salt-content wastewater treatment system, the high-efficiency biological packing layer is arranged in the hydrolysis acidification tank, suspended organic solids and macromolecular substances which are difficult to biodegrade in the sewage are hydrolyzed into soluble organic substances and micromolecular substances which are easy to biodegrade, and therefore the biodegradability of the wastewater is improved.
Preferably, the system further comprises a regulating reservoir which is communicated with the triple effect evaporation unit pipeline through a lift pump.
The waste water salt concentration can change along with the production fluctuation period and the change of impact factors, and the waste water treatment system with high salt content is provided with the regulating reservoir to reduce the impact caused by the reduction of the low salt content water volume or the increase of the over-high salt content water volume, so that the water quality and the water volume are regulated and balanced, and the influence of the waste water salt concentration change on the operation efficiency and the service life of the system is avoided.
Preferably, be provided with the conductance detector, waste water inlet pipeline and running water inlet pipeline in the equalizing basin, waste water inlet pipeline is provided with first electric valve, running water inlet pipeline is provided with the second electric valve, the system still includes the control unit, the control unit with conductance detector, first electric valve and second electric valve electricity are connected, the control unit according to the signal regulation of conductance detector feedback first electric valve and second electric valve.
The high-salt-content wastewater treatment system detects the salt concentration of wastewater through the conductivity detector, and controls the water quality entering the triple-effect evaporation unit by adjusting the proportion of the wastewater and tap water according to the salt concentration of the wastewater.
Preferably, the system further comprises a sludge tank and a solid-liquid separation device, wherein the sludge tank is communicated with the MBR unit, a feed inlet of the solid-liquid separation device is communicated with the sludge tank, and a liquid outlet of the solid-liquid separation device is communicated with the buffer tank through a return pipeline flowing to the buffer tank.
The high-salt-content wastewater treatment system conveys sludge discharged by the MBR unit to a sludge tank, then the sludge and the water are carefully separated by the solid-liquid separation device, mud cakes are conveyed to a curing workshop for treatment, and filtrate flows back to the intermediate water tank for further treatment.
Preferably, the solid-liquid separation device is a stacked spiral sludge dewatering machine.
Preferably, a water distribution pipe is arranged in the hydrolysis acidification tank, the water distribution pipe is arranged below the packing layer, and the water distribution pipe is communicated with the buffer tank through a pipeline.
The hydrolytic acidification tank is lifted from the water distribution pipe at the bottom to the top through the packing layer to realize the functions of hydrolytic acidification, removal of suspended matters and the like.
Preferably, a second high-efficiency biological filler layer is arranged in the aerobic tank, and the second high-efficiency biological filler layer comprises the following components in percentage by weight: 50-60% of main materials, 10-20% of corrosion inhibitor and 20-40% of nutrient components, wherein the main materials comprise the following components in percentage by weight: 50-70% of diatomite and 30-50% of activated carbon, wherein the corrosion inhibitor comprises the following components in percentage by weight: 20 to 30 percent of bentonite and 70 to 80 percent of ion exchange resin, wherein the nutrient components comprise 70 to 80 percent of starch, 10 to 20 percent of glucose, 5 to 10 percent of urea and 2 to 5 percent of diammonium phosphate.
The second high-efficiency biological packing layer in the aerobic tank is beneficial to the attachment growth of the biological membrane, organic matters in water are adsorbed and oxidized and decomposed by microorganisms on the biological membrane, and meanwhile, the degradation of the organic matters and the nitration reaction of the aerobic microorganisms can be effectively carried out to remove ammonia nitrogen by utilizing the biological nitrification and the organic matter degradation of the aerobic microorganisms.
The beneficial effects of the utility model reside in that: the utility model provides a high salt effluent disposal system that contains, the utility model discloses a high salt effluent disposal system that contains to the high salt effluent contains the composition and does not have the special requirement, can realize the continuous processing to most of high viscosity, high pollution, high salt effluent that contains, area is less, and it produces to have no secondary pollutant basically after handling, has technical feasibility, greatly reduced the separation cost, also made the high recycle technique that contains salt effluent obtain the rapid development, considered from economic environmental protection angle, the utility model discloses a high salt effluent disposal system that contains is very realistic meaning.
Drawings
FIG. 1 is a schematic structural diagram of a high-salt-content wastewater treatment system according to an embodiment of the present invention.
FIG. 2 is a schematic structural diagram of a triple-effect evaporation unit of the high-salt-content wastewater treatment system of the embodiment of the present invention.
FIG. 3 is a schematic structural diagram of an MBR unit of the high-salt-content wastewater treatment system according to the embodiment of the present invention.
Fig. 4 is a schematic structural diagram of a hydrolysis-acidification tank of the high-salt-content wastewater treatment system according to the embodiment of the present invention.
The system comprises a three-effect evaporation unit 1, a three-effect evaporation unit 101, a first-effect heater 102, a first-effect evaporator 103, a second-effect heater 104, a second-effect evaporator 105, a three-effect heater 106, a third-effect evaporator 107, a heat exchanger 108, a condenser 109, a heat medium inlet of the heat exchanger 1010, a heat exchange refrigerant outlet 1011, a heat medium outlet of the heat exchanger 1012, a steam outlet of the third-effect evaporator 1013, a steam inlet of the first-effect evaporator 2, a buffer tank 3, a hydrolysis acidification tank 4, an anaerobic tank 5, an aerobic tank 6, an MBR membrane unit 601, an MBR membrane module 602, a perforation aeration device 7, a sludge tank 8, a solid-liquid separation device 9, a return pipeline 10 and a regulating tank.
Detailed Description
For better illustrating the objects, technical solutions and advantages of the present invention, the present invention will be further described with reference to the following embodiments.
Example 1
As the utility model discloses a high salt wastewater treatment system who contains embodiment, as shown in fig. 1, fig. 2, fig. 3 and fig. 4, including triple effect evaporation unit 1, buffer pool 2, hydrolysis acidification tank 3, anaerobism pond 4, good oxygen pond 5 and MBR membrane unit 6 of pipeline intercommunication in proper order, MBR unit 6 includes MBR membrane module 601, and MBR unit 6 is inside to be provided with perforation aeration equipment 602, and perforation aeration equipment 602 sets up in MBR membrane module 601 below, is provided with packing layer 601 in the hydrolysis acidification tank 3.
The high salt wastewater treatment system of this embodiment is through setting up the perforation aeration equipment in MBR membrane module below, the perforation aeration equipment is used for the surface cleaning of MBR membrane module, form inside circulation flow, under the blast aeration effect, the surface of MBR membrane is washd to mud mixed liquid high speed, make the granule on membrane surface drop, the perforation aeration equipment still is used for supplying the aerobic biological oxygen demand, the processing through the MBR unit obtains clear play water, biological floc, the suspended solid, pathogen and macromolecule dissolubility organic matter etc. are effectively held back by the MBR unit. The high salt wastewater treatment system of this embodiment combines MBR unit and traditional waste water biological treatment technique, the construction of secondary sedimentation pond has not only been saved, and improve solid-liquid separation efficiency greatly, and because set up the perforation aeration equipment in the MBR unit, the higher microbial biomass in maintaining MBR unit is held back to high efficiency through the MBR membrane module, increased the appearance of special effect fungus (especially dominant flora) in active sludge concentration and the mud through combining aeration equipment, biochemical reaction rate has been improved, the mud emission has been reduced, and the membrane module of MBR unit makes the difficult degradation composition of macromolecule in the sewage have sufficient dwell time at the system of high salt wastewater of triple effect evaporation separation processing, the degradation efficiency of difficult degradation organic matter has been improved. The high salt wastewater treatment system of this embodiment combines hydrolysis-acidification pool and good oxygen pond, in hydrolysis-acidification pool, hold back mud and facultative microbe through the absorption of a large amount of packing layers, the packing layers provides the stable environment of perching and breeding for the microbe, influence the growth of microbe, breed and drop, the packing layers is the place that biomembrane and waste water contacted, and can have mandatory turbulent motion to rivers, make waste water can redistribute, under the biodegradation, the solid in the waste water, macromolecule and the organic matter degradation of difficult biodegradable are the micromolecule organic matter of easy biodegradation, make waste water obtain under less energy consumption and shorter dwell time at subsequent processing unit and handle. Before the hydrolytic acidification tank is used for an aerobic tank treatment process, non-soluble organic matters in wastewater are mainly converted into soluble organic matters, macromolecular substances which are difficult to degrade are converted into small molecular substances which are easy to degrade, the biodegradability of the wastewater is improved, the subsequent aerobic treatment is facilitated, and the wastewater can carry out denitrification reaction on nitrate nitrogen in nitrified liquid which flows back in the hydrolytic acidification tank under the anoxic condition by utilizing the action of denitrifying bacteria to achieve the biological denitrification effect. The high salt wastewater treatment system of this embodiment, to the high salt wastewater contains the composition does not have special requirement, can realize the continuous processing to most of high viscosity, high pollution, the high salt wastewater that contains, area is less, and no secondary pollutant produces basically after handling, has technical feasibility, greatly reduced separation cost, also made the high salt wastewater's of containing recycle technique obtain rapid development, considered from economic environmental protection, the aforesaid high salt wastewater treatment system that contains has very realistic meaning.
Further, the perforated aeration apparatus 602 is a tubular microporous aerator.
Further, the triple-effect evaporation unit 1 comprises a first-effect heater 101, a first-effect evaporator 102, a second-effect heater 103, a second-effect evaporator 104, a triple-effect heater 105, a triple-effect evaporator 106, a heat exchanger 107 and a condenser 108 which are sequentially communicated, wherein a heat medium inlet 109 of the heat exchanger 107 is communicated with a steam outlet 1012 of the triple-effect evaporator 106 through a pipeline, a heat medium outlet 1011 of the heat exchanger 107 is communicated with the condenser 108, and a refrigerant outlet 1010 of the heat exchanger 107 is communicated with a steam inlet 1013 of the first-effect evaporator 102 through a pipeline. The high-salt-content wastewater treatment system is provided with the heat exchanger, steam generated by the evaporation of the three-effect evaporator is input into the one-effect evaporator after heat exchange of the heat exchanger, so that heat can be saved, the condensation load is reduced, and the problem of overheating of the one-effect evaporator is avoided.
Further, a packing layer in the hydrolysis acidification tank is a first high-efficiency biological packing layer, and the first high-efficiency biological packing layer comprises the following components in percentage by weight: 50-60% of main materials, 10-20% of corrosion inhibitor and 20-40% of nutrient components, wherein the main materials comprise the following components in percentage by weight: 50-70% of diatomite and 30-50% of activated carbon, wherein the corrosion inhibitor comprises the following components in percentage by weight: 20 to 30 percent of bentonite and 70 to 80 percent of ion exchange resin, wherein the nutrient components comprise 70 to 80 percent of starch, 10 to 20 percent of glucose, 5 to 10 percent of urea and 2 to 5 percent of diammonium phosphate. The high-salt-content wastewater treatment system hydrolyzes suspended organic solids and macromolecular substances which are difficult to biodegrade in sewage into soluble organic substances and micromolecular substances which are easy to biodegrade by arranging the high-efficiency biological filler layer in the hydrolysis acidification tank, thereby improving the biodegradability of the wastewater.
Further, the system also comprises a regulating reservoir 10, and the regulating reservoir 10 is communicated with the pipeline of the triple-effect evaporation unit 2 through a lifting pump. The waste water salt concentration can change along with the production fluctuation period and the change of impact factors, and the waste water treatment system with high salt content is provided with the regulating reservoir to reduce the impact caused by the reduction of the low salt content water volume or the increase of the over-high salt content water volume, so that the water quality and the water volume are regulated and balanced, and the influence of the waste water salt concentration change on the operation efficiency and the service life of the system is avoided.
Furthermore, a conductivity detector, a wastewater inlet pipeline and a tap water inlet pipeline are arranged in the regulating reservoir, a first electric valve is arranged on the wastewater inlet pipeline, a second electric valve is arranged on the tap water inlet pipeline, the system further comprises a control unit, the control unit is electrically connected with the conductivity detector, the first electric valve and the second electric valve, and the control unit adjusts the first electric valve and the second electric valve according to a signal fed back by the conductivity detector. The high-salt-content wastewater treatment system detects the salt concentration of wastewater through the conductivity detector, and controls the water quality entering the triple-effect evaporation unit by adjusting the proportion of the wastewater and tap water according to the salt concentration of the wastewater.
Further, the system also comprises a sludge tank 7 and a solid-liquid separation device 8, wherein the sludge tank 7 is communicated with the MBR unit 6, a feed inlet of the solid-liquid separation device 8 is communicated with the sludge tank 7, and a liquid outlet of the solid-liquid separation device 8 is communicated with the buffer tank 2 through a return pipeline 9 flowing to the buffer tank 2. The high-salinity wastewater treatment system conveys sludge discharged by the MBR unit to a sludge tank, the sludge and water are carefully separated by a solid-liquid separation device, a sludge cake is conveyed to a curing workshop for treatment, and filtrate flows back to an intermediate water tank for further treatment.
Further, the solid-liquid separation device 8 is a spiral sludge dewatering machine.
Further, a water distribution pipe 302 is arranged in the hydrolysis acidification tank 3, the water distribution pipe 302 is arranged below the packing layer 301, and the water distribution pipe 302 is communicated with the buffer tank 2 through a pipeline. The hydrolytic acidification tank is lifted from the water distribution pipe at the bottom to the top through the packing layer to realize the functions of hydrolytic acidification, removal of suspended matters and the like.
Further, a second high-efficiency biological filler layer is arranged in the aerobic tank, and comprises the following components in percentage by weight: 50-60% of main materials, 10-20% of corrosion inhibitor and 20-40% of nutrient components, wherein the main materials comprise the following components in percentage by weight: 50-70% of diatomite and 30-50% of activated carbon, wherein the corrosion inhibitor comprises the following components in percentage by weight: 20 to 30 percent of bentonite and 70 to 80 percent of ion exchange resin, wherein the nutrient components comprise 70 to 80 percent of starch, 10 to 20 percent of glucose, 5 to 10 percent of urea and 2 to 5 percent of diammonium phosphate. The second high-efficiency biological packing layer in the aerobic tank is beneficial to the attachment growth of the biological membrane, organic matters in water are adsorbed and oxidized and decomposed by microorganisms on the biological membrane, and meanwhile, the degradation of the organic matters and the nitration reaction of the aerobic microorganisms can be effectively carried out to remove ammonia nitrogen by utilizing the biological nitrification and the organic matter degradation of the aerobic microorganisms.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the protection scope of the present invention, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present invention can be modified or replaced with equivalents without departing from the spirit and scope of the technical solutions of the present invention.
Claims (6)
1. The high-salt-content wastewater treatment system is characterized by comprising a triple-effect evaporation unit, a buffer tank, a hydrolysis acidification tank, an anaerobic tank, an aerobic tank and an MBR (membrane bioreactor) membrane unit which are communicated in sequence through pipelines, wherein the MBR unit comprises an MBR membrane component, a perforation aeration device is arranged inside the MBR unit and is arranged below the MBR membrane component, and a packing layer is arranged in the hydrolysis acidification tank;
the perforating aeration device is a tubular microporous aerator; the triple-effect evaporation unit comprises a first-effect heater, a first-effect evaporator, a second-effect heater, a second-effect evaporator, a triple-effect heater, a triple-effect evaporator, a heat exchanger and a condenser which are sequentially communicated, a heat medium inlet of the heat exchanger is communicated with a steam outlet pipeline of the triple-effect evaporator, a heat medium outlet of the heat exchanger is communicated with the condenser, and a refrigerant outlet of the heat exchanger is communicated with a steam inlet pipeline of the first-effect evaporator.
2. The high salinity wastewater treatment system of claim 1, wherein the system further comprises a surge tank in communication with the triple effect evaporation unit pipeline through a lift pump.
3. The high-salinity wastewater treatment system according to claim 2, wherein a conductivity detector, a wastewater inlet pipeline and a tap water inlet pipeline are arranged in the regulating reservoir, a first electric valve is arranged on the wastewater inlet pipeline, a second electric valve is arranged on the tap water inlet pipeline, the system further comprises a control unit, the control unit is electrically connected with the conductivity detector, the first electric valve and the second electric valve, and the control unit regulates the first electric valve and the second electric valve according to a signal fed back by the conductivity detector.
4. The high salinity wastewater treatment system according to claim 1, wherein the system further comprises a sludge tank and a solid-liquid separation device, the sludge tank is communicated with the MBR unit, a feed inlet of the solid-liquid separation device is communicated with the sludge tank, and a liquid outlet of the solid-liquid separation device is communicated with the buffer tank through a return pipeline flowing to the buffer tank.
5. The high-salinity wastewater treatment system according to claim 4, wherein the solid-liquid separation device is a stacked spiral sludge dewatering machine.
6. The high-salinity wastewater treatment system according to claim 1, wherein a water distribution pipe is arranged in the hydrolysis acidification tank, the water distribution pipe is arranged below the packing layer, and the water distribution pipe is communicated with the buffer tank through a pipeline.
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