JP2016203160A - High-temperature waste water treatment apparatus using membrane distillation process - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a high-temperature waste water treatment apparatus using a membrane distillation process.SOLUTION: A high-temperature waste water treatment apparatus using a membrane distillation process includes a membrane distillation process and a reverse osmosis membrane process. In the membrane distillation process, high-temperature waste water is separated into high-temperature concentrated waste water and product water by steam pressure difference generated by temperature difference between the high-temperature waste water and a coolant fluid. In the reverse osmosis membrane process, the product water, which contains pure water and volatile contaminants, is separated into the volatile contaminants and the pure water. The produced pure water (treated water) is transported to a high-temperature waste water source or a treated-water side of the membrane distillation for reuse, or recycled as process water or domestic water in the neighborhood leading to energy saving and waste water reduction.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a high-temperature wastewater treatment apparatus capable of producing pure water that saves energy and has almost no pollutants.

  In the membrane distillation method, the surface tension of the solvent or solute (hydrophilic substance) is larger than that of the separation membrane surface, and in the liquid state, it cannot pass through the membrane pores. Because it repels, the separation target substance is converted into a vapor phase at the surface pore inlet of the separation membrane, diffused and permeated into the pores, and finally condensed and separated from the treated water side. It is used in a desalting step for separating and removing substances and substances having relatively low volatility, or for separating organic substances having high volatility in an aqueous solution.

  Since the concept of membrane distillation was proposed in 1960, to date, research on membrane distillation has been conducted mainly in the United States, Europe, Japan and Australia. Recently, there has been an active movement to replace the membrane distillation separation process with a conventional separation process using an evaporation or reverse osmosis membrane.

  Currently, the evaporation and reverse osmotic pressure methods used in pure water production and desalination processes are energy intensive, but in particular, reverse osmotic pressure methods are in many stages before use due to contamination and fouling problems. Since the pretreatment process is performed, not only the operation management is difficult, but also the operation is performed at a high pressure. Therefore, there is a problem that a lot of electric energy as a pump power source is used and the management cost is high.

  On the other hand, membrane distillation is operated at a lower pressure than the ultrafiltration method and the reverse osmosis pressure method using a porous membrane, and is separated by a vapor pressure partial pressure difference. In addition, if the membrane distillation separation method is used, a filter or separation membrane that is operated at a high pressure without the entrainment of droplets that the traditional distillation method has in separating and removing non-volatile substances such as salts. You do not have to use it.

  Due to the advantages of the membrane distillation separation process, the desalination (dechlorination) treatment process using the membrane distillation method is excellent in low-cost utilities and the durability of the separation device. Is emerging as one of the more competitive methods.

As of the end of December 2011, there are 49,201 industrial wastewater discharge plants in Korea, and 5,269,000 m ³ / day of wastewater is generated (Environment Department, factory wastewater generation and treatment, 2013). Moreover, a huge amount of industrial wastewater is generated from various industrial processes worldwide. Wastewater generated in such industrial processes contains a variety of toxic substances at high concentrations, so it is very difficult to treat with general biological treatment methods. A processing method to which a general processing process is applied is also used in parallel. This is not only an increase in capital investment costs but also a situation in which more efficient treatment technology development is required because continuous chemical treatment costs are incurred. In addition, industrial factory wastewater generates high-temperature wastewater in various processes, which induces loss of heat sources, reduces dissolved oxygen, adversely affects the self-purification of river water, and is inappropriate. Chemical and biological reactions are accelerated, and the sewage rot phenomenon develops.

  Therefore, a method for treating high temperature wastewater by a membrane distillation method having various advantages is required.

US Published Patent No. 2014-0273060 Korean Registered Patent No. 0840976 Republic of Korea Registered Patent No. 0881757

  An object of the present invention is to provide a high-temperature wastewater treatment apparatus using a membrane distillation process capable of producing pure water from which energy is reduced and contaminants are maximally removed.

  The high-temperature wastewater treatment apparatus of the present invention for achieving the above object includes a membrane distillation step of separating the high-temperature wastewater into high-temperature wastewater concentrated water and production water by a water vapor pressure difference generated by a temperature difference between the high-temperature wastewater and the cooling fluid. A reverse osmosis membrane step of separating the volatile pollutant and the pure water by applying pressure to the production water containing the pure water and the volatile pollutant.

  Specifically, the membrane distillation step includes a membrane distillation influent water side in which high temperature wastewater is introduced and high temperature wastewater concentrated water that has not passed through the membrane distillation separation membrane remains, the membrane distillation influent water side, and membrane distillation treated water. The temperature difference between the membrane distillation separation membrane through which only the production water contained in the high temperature wastewater is passed and the high temperature wastewater concentrated water is not passed, and the high temperature wastewater by the cooling fluid is provided. A membrane distillation treatment water side that collects the production water that has passed through the membrane distillation separation membrane, and concentrates the high temperature waste water concentrated water remaining on the membrane distillation inflow water side to process and discharge the contaminants A water treatment step can be added.

  A heating device capable of supplying an additional heat source may be added to the raw water storage tank, the pretreatment step, and the membrane distillation step of the membrane distillation step.

  In the membrane distillation process, a heat exchange device capable of reusing waste heat of concentrated water can be added.

  The membrane distillation separation membrane may be a hydrophobic polymer separation membrane or a ceramic membrane.

  The hydrophobic polymer separation membrane includes polytetrafluoroethylene (Polytetrafluorethylene, PTFE), polyvinylidene fluoride (PVDF), polysulfone (PSF), polyethersulfone, PES, and polysulfone. (Polyether imide, PEI), polyimide (Polyimide, PI), polyethylene (Polyethylene, PE), polypropylene (Polypropylene, PP), and polyamide (Polyamide, PA).

  Further, specifically, the reverse osmosis membrane step is the reverse osmosis influent water side in which the production water obtained from the membrane distillation step is flown and volatile contaminants that have not passed through the reverse osmosis separation membrane remain, A reverse osmosis separation membrane that is provided so that the reverse osmosis influent water side and the reverse osmosis treated water side are separated, and only pure water contained in the product water is passed by pressure and volatile contaminants are not passed; A reverse osmosis treatment water side for collecting pure water that has passed through the reverse osmosis separation membrane, and a volatile contaminant treatment step such as crystallization and liquid fertilization of volatile contaminants remaining on the reverse osmosis inflow water side Can be added. In addition, the volatile contaminant treatment process includes a biological nitrogen removal process (nitrification, denitration, anaerobic ammonia oxidation process, etc.).

  The reverse osmosis separation membrane may be a high pressure separation membrane or a low pressure separation membrane.

  The reverse osmosis separation membrane may be cellulose acetate (CA) or polyamide (PA).

  The high temperature wastewater used in the membrane distillation process is wastewater pretreated in the pretreatment process, and the high temperature wastewater flowing into the pretreatment process is produced from a high temperature wastewater source and stored in a raw water storage tank. Can be wastewater.

  Moreover, the membrane distillation which stores the production water isolate | separated from the said membrane distillation process, and the reverse osmosis production tank which stores the pure water isolate | separated from the said reverse osmosis membrane process can be added.

  More specifically, the pure water production process includes an ultraviolet (UV) process, a CDI (capacitive deionization), an EDI (electrodeposition) process, an ion exchange (ion exchange) process, and the like. One or a fusion process can be utilized.

  The treated pure water can be provided with a conveyance pipe for internally conveying to the membrane distillation process water side of the membrane distillation step and / or a high temperature wastewater generation source.

  The high-temperature wastewater treatment apparatus of the present invention uses high-temperature wastewater to separate contaminants by membrane distillation using a temperature difference, and provides the production water from which the contaminants have been separated as raw water for a reverse osmosis tank, By separating the water, energy can be saved, and the produced pure water can be reused as process water for industrial processes, and the raw water of the high temperature wastewater source can be secured stably. The produced pure water can be used not only as a high temperature waste water process but also as other process water and domestic water.

  In particular, high-temperature wastewater is subjected to membrane distillation and then transferred to the reverse osmosis membrane process in the subsequent stage to produce pure water from which contaminants have been removed to the maximum. Can be saved.

  In addition, when the high temperature wastewater contains ammonia, nitrogenous fertilizer can be produced as a by-product of the process.

1 is a diagram illustrating an apparatus for treating high temperature wastewater according to an embodiment of the present invention. 4 is a diagram illustrating various membrane distillation processes according to an exemplary embodiment of the present invention.

  The present invention relates to a high-temperature wastewater treatment apparatus using a membrane distillation process that can save energy and produce pure water with almost no contaminants.

  Hereinafter, the present invention will be described in detail with reference to FIG.

  As shown in FIG. 1, the high-temperature wastewater treatment apparatus 10000 of the present invention includes a membrane distillation process 400 and a reverse osmosis membrane process 700, and specifically includes a high-temperature wastewater generation source 100, a raw water storage tank 200, and a pretreatment process 300. , Membrane distillation process 400, membrane distillation production tank 600, reverse osmosis membrane process 700, volatile contaminant treatment process 800, and reverse osmosis production tank 900. Moreover, the pure water production process 1000 can be added after the reverse osmosis production tank 900 as needed. Further, depending on the state of the process, the reverse osmosis membrane process 700 may be omitted or a pure water production process 1000 (CDI, EDI, ion exchange resin) may be added instead of the reverse osmosis membrane process 700.

  In FIG. 1, a dotted line means a transport pipe through which pure water is transported.

High-temperature wastewater source The high-temperature wastewater source 100 is a process for generating high-temperature wastewater, and cooling water is used for product production, and the cooling water contains contaminants generated from the production process of the high-temperature wastewater source. It is contained and converted to high temperature wastewater with high temperature heat.

  The cooling water is not particularly limited as long as it is cold water. Desirably, pure water treated from surface water, seawater, sewage wastewater, groundwater, or pure water 1000 is preferable.

  The high temperature wastewater is wastewater having a temperature of 25 ° C. or higher, preferably 25 ° C. to 2,000 ° C. generated from an industrial process using heat; steel wastewater, dyeing wastewater, plating wastewater, food processing wastewater, petroleum refining wastewater Any industry that produces high temperature wastewater such as petrochemical process wastewater, pulp processing wastewater, paper mill wastewater, leather processing wastewater, textile wastewater, mining wastewater, metal wastewater, nonmetal wastewater, rubber and plastic processing wastewater, chemical process wastewater, etc. Process wastewater is mentioned.

Raw Water Storage Tank The raw water storage tank 200 stores the high temperature waste water produced from the high temperature waste water generation source 100 and can stabilize the high temperature waste water mixed with waste water having various temperatures.

  The material of the raw water storage tank 200 is not particularly limited as long as it is a metal or non-metal material that does not react with high-temperature wastewater, and is preferably polyvinyl chloride (PVC), fiber reinforced plastic (Fiber). Reinforced Plastic (FRP), SUS316L, and DUPLEX Stainless Steel.

  Moreover, in order to hold | maintain the temperature of high temperature wastewater, a heat insulating material can be used, However, The raw material of the said heat insulating material will not be specifically limited if it is a material which can hold | maintain temperature.

Pre-treatment process The high-temperature wastewater stored in the raw water storage tank 200 is transferred to the pre-treatment process 300 through a pump or gravity, and the pre-treatment process 300 is continuously subjected to membrane fouling and organic fouling in the membrane distillation process 400. , Bio-fouling, organic fouling (scaling) can be controlled in advance, but the pretreatment step 300 can be omitted depending on the properties of the high-temperature wastewater.

  Examples of the pretreatment process 300 include agglomeration, precipitation, filtration, and sterilization processes.

  As an example, the preprocessing step 300 may include a sensor unit and a processing unit. The sensor unit may be coupled to one or more of the raw water storage tank 200, the inflow water side of the membrane distillation process 400, or a pipe connecting the raw water storage tank and the inflow water side of the membrane distillation process. In addition, the injection unit may be connected to any one or more of the raw water storage tank 200 and the pipe connecting the raw water storage tank and the inflow water side of the membrane distillation process.

  In some cases, a separate diluting device may be added to the sensor unit in order to measure the concentration of the sensor unit above the sensor unit measurement limit. The diluting device may take any form such as a reaction tank or a tube.

  The processing unit includes a system for calculating an appropriate amount of medicine to be injected based on data measured from a sensor unit, using already input data or formulas, or evaluating data stored through measurement. The information on the calculated appropriate chemical amount is transmitted to the injection part.

  Examples of the chemical include one or more selected from the group consisting of a pH regulator, an Eh regulator, a precipitant, a flocculant, a disinfectant, and an anti-scalant. By injecting the chemical into the raw water discharged from the raw water storage tank, the separation membrane separation performance (flux) in the membrane distillation process is prevented from being reduced due to the formation of scaling, thereby significantly reducing the separation membrane cleaning cycle. The cost for replacing the separation membrane due to the increase in the life of the separation membrane can be significantly reduced.

Membrane Distillation Process Membrane distillation process 400 is a process for producing high-temperature wastewater and high-temperature wastewater concentrated water by using a water vapor pressure difference generated by a temperature difference between the high-temperature wastewater pretreated in the pretreatment process 300 and a separately supplied cooling fluid. Separated into water (for example, a mixture of pure water and volatile contaminants).

  Specifically, in the membrane distillation process 400, the high temperature wastewater is flowed in, and when the high temperature wastewater is separated by using the water vapor pressure difference, the high temperature wastewater concentrated water that does not pass through the membrane distillation separation membrane 410 remains. And the membrane distillation influent side 410 and the membrane distillation treated water side 430 are separated, and due to the water vapor pressure difference, the production water contained in the high temperature wastewater is passed, and the high temperature wastewater concentrated water is not passed. A membrane distillation separation membrane 420 and a cooling unit (not shown) through which a cooling fluid flows are provided, and a temperature difference with high-temperature wastewater is induced by the cooling fluid, and only the production water that has passed through the membrane distillation separation membrane is obtained. A membrane distillation treated water side 430 to collect.

  The high temperature waste water concentrated water remaining on the membrane distillation influent side 410 reaches an appropriate concentration rate depending on the purpose, or is concentrated when the temperature of the concentrated water is lower than the temperature of the high temperature waste water into which it is introduced. In the water treatment process 500, contaminants are treated and discharged. Further, the concentrated water that has reached an appropriate concentration rate may be transported to the membrane distillation influent side 410 through the internal transport pipe. In addition, the waste heat of the concentrated water can be reused by the heat exchanger 440 and used as a heat source for the waste water of the high temperature waste water generation source 100, the raw water storage tank 200, and the pretreatment process 300. The heat exchange device 440 may be provided in the middle of the concentrated water moving to the concentrated water treatment process 500.

  The membrane distillation separation membrane 420 is a hydrophobic polymer separation membrane or a ceramic membrane. Specifically, the hydrophobic polymer separation membrane is polytetrafluoroethylene (PTFE), polyvinylidene fluoride (PVDF), polysulfone. 1 or more types selected from the group consisting of (PSF), polyethersulfone (PES), polyetherimide (PEI), polyimide (PI), polyethylene (PE), polypropylene (PP), and polyamide (PA). It is done.

  In addition, the cooling fluid flowing to the membrane distillation process water side 430 may be water obtained by transporting pure water treated from the reverse osmosis production tank 900 or the pure water production process 1000 through an internal transport pipe.

  Further, the production water collected on the membrane distillation treated water side 430 is transferred to and stored in the membrane distillation production tank 600 which is a subsequent stage.

  The form of the membrane distillation process 400 according to the present invention is not particularly defined, and may be any form such as an immersion type or a pressure type. In addition, the membrane distilled water treatment apparatus of the present invention may be any type of membrane distillation water treatment apparatus, such as a Direct Contact Membrane Distillation (DCMD) method, an Air Gap Membrane Distillation (AGMD) method, and a Vacuum Membrane Drum ) Method, Sweep Gas Membrane Distillation (SGMD) method, and the like. As shown in FIG. 2, various cooling fluids such as liquid (DCMD) or gas (AGMD, SGMD) may be used for the cooling unit according to a membrane distillation apparatus, or the cooling unit may be used in a vacuum state (VMD). it can.

  In the raw water storage tank 200, the pretreatment process 300, and the membrane distillation process 400, a heating device (not shown) is connected to each tank and a pipe connected to each tank (a pipe into which the treated water flows into each tank). ) May be added.

Membrane Distillation Production Tank The membrane distillation production tank 600 is a storage tank that stores medium temperature production water (for example, mixed water of pure water and volatile contaminants) separated from the membrane distillation process 400, and the production water. Insulation may be provided to maintain the temperature.

  The heat insulating material is not particularly limited as long as it is a material that is not denatured at a medium temperature, and may include a material containing an air layer such as a foamed styrofoam or glass fiber.

  The “medium temperature” means a temperature lower than the temperature of the high temperature waste water.

Reverse Osmosis Membrane Process In the reverse osmosis membrane process 700, production water that is a mixed water of pure water and volatile pollutants is supplied from the membrane distillation production tank 600 through a pressure pump, and then pressure is applied to the production water. Separate into volatile pollutants and pure water.

  Specifically, in the reverse osmosis membrane process 700, the production water obtained from the membrane distillation process 400 is introduced, and the reverse osmosis in which volatile contaminants that have not passed through the reverse osmosis separation membrane remain during the production water separation. The inflow water side 710 is provided to be separated from the reverse osmosis inflow water side and the reverse osmosis treated water side, and only pure water contained in the product water is passed by pressure, and volatile pollutants pass. A reverse osmosis separation membrane 720, and a reverse osmosis water side 730 that collects pure water that has passed through the reverse osmosis separation membrane.

  Concentrated water containing volatile contaminants remaining on the reverse osmosis inflow side 710 is transferred to the reverse osmosis inflow side 710 through an internal transfer pipe until it reaches an appropriate concentration rate depending on the purpose, or is immediately volatilized. The process moves to the processing step 800 for treating a toxic contaminant.

  The volatile contaminant treatment process 800 removes or crystallizes volatile contaminants present in the concentrated water. When the volatile pollutant is nitrogen, it is switched to crystallization or liquid fertilizer and fertilized, or removed by a biological nitrogen removal step (nitrification, denitration, anaerobic ammonia oxidation step or the like). A partial nitrification step can be further performed during fertilization. In this case, the volatile contaminant means any volatile contaminant that is not removed in the membrane distillation process 400 and is removed only in the reverse osmosis membrane process 700.

  Specifically, volatile contaminants include acetamide, aniline, methyl alcohol, 2-propanol, N, N-dimethylformamide (N, N-dimethylformamide). ), Hydrogen cyanide, nitromethane, methyl ethyl ketone, furfural, 1,2-epoxybutane, 1,2-chloroethanol (2-chloroethane), hydrogen cyanide, nitromethane, methyl ethyl ketone, furfural, 1,2-epoxybutane, 2-chloroethanol, 2-chloroethane. Ononitrile (Propionontrile), Acrylonitrile (Acrylonitile) ), Allyl alcohol, chloromethyl methyl ether, phenol, 2-methoxyethanol, diethylamine, 2-ethoxyethanol, and tetraethoxyethanol. Fluoroethylene (Tetrafluoroethylene), 1,4-Dioxane (1,4-Dioxane), Ethyl acetate (Ethyl acetate), Hydrazine, Glycidol, Methyl isothiocyanate (Hexamethylphosphonate) Hexamethyl ph spheramide, crotonaldehyde, hydrogen chloride, hydrogen fluoride, ammonia, nitric acid, hydrogen peroxide, hydrogen bromide hydrogen, hydrogen bromide hydrogen, hydrogen bromide hydrogen, hydrogen bromide hydrogen , Acetaldehyde, acetylene, acetylene dichloride, acrolein, acrylonitrile, benzene, 1,3-butadiene, 1,3-butane Butane), 1-bute (1-Butene), 2-butene (2-Butene), Carbon Tetrachloride, Chloroform, Cyclohexane, 1,2-Dichloroethane, 1,2-Diethylamine ), Dimethylamine, ethylene, formaldehyde, n-hexane, isopropyl alcohol, methanol, methyl ethyl ketone, methylene ethyl ketone, methylene ethyl ketone, methylene ethyl ketone, methylene ethyl ketone, and methylene ethyl ketone. Chloride) MTBE (Methyl Tertiary Butyl Ether), Propylene (Propylene), Propylene Oxide (Propylene Oxide), 1,1,1-Trichloroethane (1,1,1-Trichloroethane), Trichlorethylene (Trichloroethylene), Gasoline (Gasoline), Selected from Naphtha, Crude Oil, Acetic Acid, Ethylbenzene, Nitrobenzene, Toluene, Tetrachloroethylene, Xylene, and Styrene 1 done Or more, and the like.

  The reverse osmosis separation membrane 720 is a high-pressure separation membrane or a low-pressure separation membrane, but it is desirable to use a low-pressure separation membrane to save energy. The reverse osmosis separation membrane 720 is not particularly limited, such as cellulose acetate (CA) or polyamide (PA), and the form may be a flat membrane, a hollow fiber membrane, a spiral membrane, or the like.

Reverse Osmosis Production Tank The reverse osmosis production tank 900 stores the pure water separated from the reverse osmosis membrane process 700, transports the pure water to the high temperature wastewater generation source 100, the membrane distillation treated water side 430, etc., and reuses it. Or it can be reused as nearby process water or domestic water. If pure water at a higher level than the production water produced from the reverse osmosis membrane process 700 is required, it can be carried into the pure water production process 1000 to remove a trace amount of contaminants. Here, a trace amount of contaminant means any contaminant that is not removed from the reverse osmosis membrane process 700.

Pure water production process The pure water production process 1000 may be provided to remove contaminants that are not separated from the reverse osmosis membrane process 700. Specifically, the pure water production process 1000 may be added when pure water equal to or higher than the pure water generated from the reverse osmosis membrane process 700 is required as cooling water or process water. Examples of the process include an ultraviolet (UV) process, CDI, EDI, and ion exchange process, and the single process can be used as a single process or a fusion process depending on the purpose. The pure water produced from the pure water production process 1000 can be transported to the high-temperature wastewater generation source 100, the membrane distillation process water side 430, etc. through the transport pipe and reused, or can be reused as nearby process water or domestic water. . However, the pure water production process 1000 can be omitted according to the property standard of reused water.

  The high-temperature wastewater treatment apparatus 10000 according to the present invention obtains the production water from the high-temperature wastewater using the high-temperature wastewater as the inflow source and the cooling fluid as the cooling source in the membrane distillation process in order to treat the high-temperature wastewater. It is to obtain pure water by treating water in a reverse osmosis membrane process. At this time, as in the present invention, when treated by a reverse osmosis membrane step-membrane distillation step method that is not a membrane distillation step-reverse osmosis membrane step treatment method, the temperature of the wastewater that has passed through the reverse osmosis membrane step is lowered. In addition, since waste water cannot be used as an inflow source in the membrane distillation process, the cost increases and it is impossible to obtain pure water from which contaminants are removed to the maximum extent.

  As described above, those skilled in the art will understand that the present invention can be implemented in other specific forms without changing the technical idea and the essential features. The scope of the present invention is expressed by the following claims rather than the above detailed description, and the meaning and scope of the claims, and any modified or modified forms derived from the equivalent concept thereof, It should be construed as included in the scope of the present invention.

  The present invention can be used in a high-temperature wastewater treatment apparatus using a membrane distillation process.

10000: High-temperature wastewater treatment apparatus 100: High-temperature wastewater generation source 200: Raw water storage tank 300: Pretreatment process 400: Membrane distillation process 410: Membrane distillation influent water side 420: Membrane distillation separation membrane 430: Membrane distillation treatment water side 440: Heat Exchange device 500: Concentrated water treatment process 600: Membrane distillation production tank 700: Reverse osmosis membrane process 710: Reverse osmosis inflow water side 720: Reverse osmosis separation membrane 730: Reverse osmosis treatment water side 800: Volatile pollutant treatment process 900: Reverse osmosis production tank 1000: Pure water production process

Claims (21)

A membrane distillation step of separating the high temperature waste water into high temperature waste water concentrated water and product water by a water vapor pressure difference generated by a temperature difference between the high temperature waste water and the cooling fluid;
A reverse osmosis membrane step of separating the volatile pollutant and pure water by applying pressure to the production water containing pure water and volatile pollutant;
A high-temperature wastewater treatment apparatus using a membrane distillation process characterized by comprising: The membrane distillation step includes
Membrane distillation influent water side in which high temperature wastewater is introduced and high temperature wastewater concentrated water that has not passed through the membrane distillation separation membrane remains,
The membrane distillation separation membrane is provided so that the membrane distillation influent water side and the membrane distillation treated water side are separated, and the production water contained in the high temperature wastewater is passed by the water vapor pressure difference, and the high temperature wastewater concentrated water is not passed. When,
Membrane distillation treated water that induces a temperature difference with the high temperature wastewater by the cooling fluid and collects the production water that has passed through the membrane distillation separation membrane,
The high-temperature wastewater treatment apparatus using the membrane distillation process according to claim 1, wherein   The membrane distillation step according to claim 2, wherein the membrane distillation step is further added with a concentrated water treatment step of treating and discharging contaminants of the high-temperature wastewater concentrated water remaining on the membrane distillation influent side. High temperature wastewater treatment equipment using   The high-temperature wastewater treatment apparatus using a membrane distillation process according to claim 2, wherein the membrane distillation process further comprises a heat exchange device.   The high-temperature wastewater treatment apparatus using a membrane distillation process according to claim 2, wherein the membrane distillation separation membrane is a hydrophobic polymer separation membrane or a ceramic membrane.   The hydrophobic polymer separation membrane includes polytetrafluoroethylene (PTFE), polyvinylidene fluoride (PVDF), polysulfone (PSF), polyethersulfone (PES), polyetherimide (PEI), polyimide (PI), polyethylene The high-temperature wastewater treatment apparatus using a membrane distillation process according to claim 5, wherein the apparatus is one or more selected from the group consisting of (PE), polypropylene (PP), and polyamide (PA). The reverse osmosis membrane process includes:
The reverse osmosis influent water side in which the production water obtained from the membrane distillation step flows in and volatile contaminants not passing through the reverse osmosis separation membrane remain,
A reverse osmosis separation membrane that is provided so that the reverse osmosis influent water side and the reverse osmosis treated water side are separated, and only pure water contained in the product water is passed by pressure and volatile contaminants are not passed; ,
A reverse osmosis treated water side for collecting pure water that has passed through the reverse osmosis separation membrane;
The high-temperature wastewater treatment apparatus using the membrane distillation process according to claim 1, wherein   The volatile pollutant treatment step is added to the reverse osmosis membrane step, wherein a volatile pollutant remaining on the reverse osmosis inflow water side is crystallized, liquid fertilized or denitrated to be discharged. A high-temperature wastewater treatment apparatus using the membrane distillation step according to claim 7.   The high temperature wastewater treatment apparatus using a membrane distillation process according to claim 7, wherein the reverse osmosis separation membrane is a high pressure separation membrane or a low pressure separation membrane.   The high temperature wastewater treatment apparatus using a membrane distillation process according to claim 7, wherein the reverse osmosis separation membrane is a cellulose acetate type (CA) or a polyamide type (PA).   The high-temperature wastewater treatment apparatus using a membrane distillation process according to claim 1, wherein the high-temperature wastewater is wastewater pretreated in a pretreatment process.   The high-temperature wastewater treatment apparatus using a membrane distillation process according to claim 11, wherein the high-temperature wastewater flowing into the pretreatment process is produced from a high-temperature wastewater source and stored in a raw water storage tank.   The high-temperature wastewater treatment apparatus using a membrane distillation process according to claim 12, wherein the raw water storage tank, the pretreatment process, and the membrane distillation process are further provided with a heating device.   The high-temperature wastewater treatment apparatus using a membrane distillation process according to claim 1, further comprising a membrane distillation production tank for storing production water separated from the membrane distillation process.   The high temperature wastewater treatment apparatus using a membrane distillation process according to claim 1 or 2, wherein a reverse osmosis production tank for storing pure water obtained from the reverse osmosis membrane process is added.   The high-temperature wastewater treatment apparatus using a membrane distillation process according to claim 15, further comprising a pure water production process for removing contaminants of the obtained pure water.   The high-temperature wastewater treatment apparatus using a membrane distillation process according to claim 16, further comprising a transfer pipe for internally conveying the treated pure water to the membrane distillation process water side of the membrane distillation process.   The high-temperature wastewater treatment apparatus using a membrane distillation process according to claim 13, further comprising a reverse osmosis production tank for storing pure water obtained from the reverse osmosis membrane process.   The high-temperature wastewater treatment apparatus using a membrane distillation process according to claim 18, further comprising a pure water production process for removing contaminants of the obtained pure water.   The wastewater treatment process according to claim 19, wherein the pure water production process includes an ultraviolet (UV) process, a CDI, an EDI, and an ion exchange process.   The high-temperature wastewater treatment apparatus using a membrane distillation process according to claim 19, further comprising a conveyance pipe for internally conveying the treated pure water to the high-temperature wastewater generation source.

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