Intelligent industrial circulating water treatment system and method

Abstract

The invention belongs to the technical field of industrial circulating water treatment, and particularly relates to an intelligent industrial circulating water treatment system and method. Comprising a coarse filter, an adsorption device, a thermoelectric conversion module, an electrochemical electrolytic tank, a precision filter, a reverse osmosis device, an electrodialysis device, a water tank, filter pressing equipment and a crystallization desalting device, through multi-stage water treatment steps including rough filtration, adsorption, evaporation condensation, precision filtration, reverse osmosis, electrodialysis and the like, pollutants such as solid impurities, organic matters and salt in water are effectively removed, repeated recycling of wastewater is realized, dependence on an external water source is reduced, and the comprehensive utilization efficiency of water resources is improved; and meanwhile, recycling of industrial circulating water waste heat is achieved, the overall energy utilization rate of the system is increased, energy consumption is reduced, and remarkable energy-saving, environment-friendly and economic benefits are achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of industrial circulating water treatment, and specifically relates to an intelligent industrial circulating water treatment system and method. Background Art

[0002] Industrial circulating water is used for cooling in the production process. The heat exchange process will cause the industrial circulating water to be concentrated. Generally, when it is concentrated to 3-5 times, scaling will occur in the pipes or cooling plates of the cooling system, thereby reducing the heat exchange function and affecting the production system. Therefore, a certain amount of circulating concentrated water must be discharged every day to prevent scaling. This results in the company needing to discharge a large amount of industrial circulating water every day, while at the same time needing to replenish the same amount of water to ensure the normal operation of the circulation system, resulting in a waste of water resources.

[0003] At present, the traditional circulating water anti-scaling, anti-corrosion, sterilization and algae removal generally adopt the treatment method of adding chemical agents. The cooling circulating water requires a large amount of sewage to maintain the balance of the total salt content in the circulating water and meet the requirements of anti-scaling and anti-corrosion. The added agents are all phosphorus-containing high-molecular organic agents, which are discharged with sewage, pollute water resources, and easily cause eutrophication of water resources. In recent years, various industrial enterprises have recycled and utilized high-temperature waste heat, but have not paid enough attention to low-temperature waste heat, especially waste heat below 100°C. Although the quality of these waste heat is very low, the quantity is huge, accounting for about 80% of the total waste heat of industrial enterprises, and the heat of circulating water accounts for more than 80% of the total heat of low-grade heat sources. Because there is no effective way to recycle this part of heat, it can only be released into the air, resulting in energy waste. Summary of the invention

[0004] The present invention provides an intelligent industrial circulating water treatment system and method to solve the problems that the existing circulating water needs to add phosphorus-containing agents, the low-temperature waste heat of the circulating water cannot be recovered, and the amount of circulating water sewage discharged is large.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions: In the first aspect, the present invention provides an intelligent industrial circulating water treatment system, including a coarse filter, an adsorption device, a thermoelectric conversion module, an electrochemical electrolytic cell, a precision filter, a reverse osmosis device, an electrodialysis device, a water tank, a filter press and a crystallization desalination device; the coarse filter is provided with a first water inlet, a second water inlet, a first water outlet and a second water outlet; the first water outlet is connected to the water tank; the second water outlet is connected to the adsorption device; the adsorption device is connected to the thermoelectric conversion module; the thermoelectric conversion module is connected to the electrochemical electrolytic cell; the electrochemical electrolytic cell is respectively connected to the precision filter and the filter press; the precision filter is connected to the reverse osmosis device; the precision filter is connected to the coarse filter through the second water inlet; the reverse osmosis device is connected to the electrodialysis device; the electrodialysis device is connected to the crystallization desalination device.

[0006] Preferably, it also includes an industrial circulating water tower pool; the industrial circulating water tower pool is connected to the reverse osmosis device and the electrodialysis device respectively.

[0007] Preferably, it also includes a DCS centralized control system; the coarse filtration filter, adsorption device, thermoelectric conversion module, electrochemical electrolysis cell, precision filter, reverse osmosis device, electrodialysis device, water pool, filter press equipment, industrial circulating water tower pool and crystallization desalination device are all electrically connected to the DCS centralized control system.

[0008] Preferably, the thermoelectric conversion module includes an evaporator, a compressor, a condenser and an expansion valve; the adsorption device is connected to the evaporator; the evaporator is connected to the electrochemical electrolytic cell; the evaporator is provided with a medium inlet, a medium outlet, a third water inlet and a third water outlet; the evaporator is connected to the adsorption device through the third water inlet; the evaporator is connected to the electrochemical electrolytic cell through the third water outlet; the compressor is connected to the evaporator through the medium outlet; the expansion valve is connected to the evaporator through the medium inlet; the compressor and the expansion valve are both connected to the condenser; wherein the evaporator, the compressor, the condenser and the expansion valve form a closed pipeline; a heat transfer medium is provided in the pipeline.

[0009] Preferably, the thermoelectric conversion module also includes a molten salt heater, a high-temperature molten salt storage tank, a high-temperature molten salt pump, a molten salt water heat exchanger, a low-temperature molten salt storage tank and a low-temperature molten salt pump connected in sequence; the condenser is provided with a molten salt inlet and a molten salt outlet; the molten salt heater is connected to the condenser through the molten salt outlet; the low-temperature molten salt pump is connected to the condenser through the molten salt inlet.

[0010] Preferably, the molten salt heater is electrically connected to a substation; and the substation is electrically connected to a power grid.

[0011] Preferably, the molten salt water heat exchanger is electrically connected to a thermal power generation user.

[0012] In a second aspect, the present invention provides an intelligent industrial circulating water treatment method, comprising: Industrial circulating water is filtered through a coarse filter to filter solid impurities and suspended solids, and the coarse filter concentrate is discharged to a pool. The filtered coarse filter water is adsorbed by an adsorption device to remove organic matter. The water produced by the adsorption device is introduced into a thermoelectric conversion module for heat exchange treatment. The water output from the thermoelectric conversion module is passed into an electrochemical electrolytic cell. After direct electrolysis, a certain amount of mixed floccules of organic pollutants and salts are produced in the electrolytic cell. The electrolytic cell sludge produced by the electrochemical electrolytic cell is filtered through a filter press; the water produced by the electrochemical electrolytic cell is introduced into a precision filter for precision filtration, and the concentrate from the precision filter returns to the coarse filter. For repeated use; the water produced by the precision filter is introduced into the reverse osmosis device for reverse osmosis treatment to obtain the reverse osmosis device concentrated water and the reverse osmosis device produced water, wherein the reverse osmosis device produced water enters the industrial circulating water tower pool for recycling; the reverse osmosis device concentrated water is introduced into the electrodialysis device for electrodialysis treatment to obtain the electrodialysis device concentrated water and the electrodialysis device produced water, wherein the electrodialysis device produced water enters the industrial circulating water tower pool for recycling; the electrodialysis device concentrated water is introduced into the crystallization desalination device, and the anions and cations in the water are precipitated in the form of crystallized salts, and the precipitated solid crystals are packaged and shipped out.

[0013] Preferably, the specific steps of introducing the water produced by the adsorption device into the thermoelectric conversion module for heat exchange treatment are: the water produced by the adsorption device transfers heat to the evaporator, the heat transfer medium in the evaporator pipeline absorbs the heat of the low-temperature heat source in the evaporator and evaporates, and then is compressed by the compressor into high-temperature and high-pressure gas to enter the condenser to release heat, and finally returns to the evaporator after reducing the pressure through the expansion valve; The low-temperature molten salt pump transports the low-temperature molten salt in the low-temperature molten salt storage tank to the condenser, and is heated to medium-temperature molten salt after heat exchange with the high-temperature and high-pressure gas in the condenser. The molten salt in the molten salt heater is reheated by the substation. After heating, the molten salt is collected in the high-temperature molten salt storage tank, and the high-temperature molten salt is passed into the molten salt water heat exchanger for heat exchange through the high-temperature molten salt pump. The molten salt water heat exchanger heats the low-temperature water of the thermal power generation user into steam and then generates electricity to achieve thermoelectric conversion. The high-temperature molten salt after heat exchange is stored in the low-temperature molten salt storage tank.

[0014] Preferably, the water production temperature of the adsorption device is 30°C~60°C; the water outlet temperature of the thermoelectric conversion module is 10°C~40°C.

[0015] Compared with the prior art, the present invention has the following beneficial effects: The present invention filters solid impurities and suspended matter in industrial circulating water through a coarse filter; removes organic matter and part of inorganic matter in the water through an adsorption device; utilizes waste heat in the industrial circulating water through a thermoelectric conversion module to achieve thermoelectric conversion; removes pollutants in the water through an electrolytic reaction in an electrochemical electrolytic cell; further filters fine particles and impurities in the water through a precision filter; removes dissolved salts, bacteria, heavy metals and other substances in the water through a reverse osmosis device; separates ions in the water through an electrodialysis device to further purify the water quality; removes anions and cations in the water through a crystallization desalination device, causing them to precipitate in the form of salt.

[0016] The present invention realizes multiple recycling of wastewater, reduces dependence on external water sources, and improves the comprehensive utilization efficiency of water resources. At the same time, the present invention enriches low-grade heat, heats molten salt, realizes heat recycling and reuse, improves the overall energy utilization rate of the system, reduces energy consumption, and has significant energy-saving, environmental protection and economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 A result schematic diagram of an intelligent industrial circulating water treatment system of the present invention; Figure 2 It is a schematic structural diagram of the thermoelectric conversion module of the present invention.

[0019] Among them: 1. Coarse filter; 101. Coarse filter water; 102. Coarse filter concentrated water; 2. Adsorption device; 201. Adsorption device water; 3. Thermoelectric conversion module; 31. Evaporator; 32. Compressor; 33. Condenser; 34. Expansion valve; 35. Molten salt heater; 36. High temperature molten salt storage tank; 37. High temperature molten salt pump; 38. Molten salt water heat exchanger; 39. Low temperature molten salt storage tank; 310. Low temperature molten salt pump; 311. Substation; 312. Power grid; 313. Thermal power generation users; 301. Thermoelectric conversion Module water output; 4. Electrochemical electrolytic cell; 401. Electrochemical electrolytic cell water production; 402. Electrolytic cell sludge discharge; 5. Precision filter; 501. Precision filter water production; 502. Precision filter concentrated water; 6. Reverse osmosis device; 601. Reverse osmosis device concentrated water; 602. Reverse osmosis device water production; 7. Electrodialysis device; 701. Electrodialysis device concentrated water; 702. Electrodialysis device water production; 8. Water pool; 9. Filter press equipment; 10. Industrial circulating water tower pool; 11. Crystallization desalination device; 12. DCS centralized control system. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0023] In the description of the embodiments of the present invention, it should be noted that if the terms "upper", "lower", "horizontal", "inner", etc. indicate an orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the invention is usually placed when in use, it is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0024] In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", which does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0025] In the description of the embodiments of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] The present invention is further described in detail below in conjunction with the accompanying drawings: The first object of the present invention is to provide an intelligent industrial circulating water treatment system, such as Figure 1 As shown, it includes a coarse filter 1, an adsorption device 2, a thermoelectric conversion module 3, an electrochemical electrolytic cell 4, a precision filter 5, a reverse osmosis device 6, an electrodialysis device 7, a water pool 8, a filter press 9 and a crystallization desalination device 11; the coarse filter 1 is provided with a first water inlet, a second water inlet, a first water outlet and a second water outlet; the first water outlet is connected to the water pool 8; the second water outlet is connected to the adsorption device 2; the adsorption device 2 is connected to the thermoelectric conversion module 3; the thermoelectric conversion module 3 is connected to the electrochemical electrolytic cell 4; the electrochemical electrolytic cell 4 is respectively connected to the precision filter 5 and the filter press 9; the precision filter 5 is connected to the reverse osmosis device 6; the precision filter 5 is connected to the coarse filter 1 through the second water inlet; the reverse osmosis device 6 is connected to the electrodialysis device 7; the electrodialysis device 7 is connected to the crystallization desalination device 11.

[0027] The present invention uses a coarse filter 1 to preliminarily filter solid impurities and suspended matter in industrial circulating water; the adsorption device 2 removes organic matter and part of inorganic matter in the water through adsorption materials (such as activated carbon and resin, etc.) to further purify the water quality; the thermoelectric conversion module 3 converts the heat energy in the water into thermoelectricity through the heat exchange principle to achieve energy recovery, thereby reducing energy consumption and achieving the effect of energy saving and environmental protection; the electrochemical electrolytic cell 4 removes pollutants in the water through electrolysis reaction to produce mixed flocs (organic pollutants and salt); the precision filter 5 is used to further filter fine particles and impurities in the water to ensure that the water quality meets higher precision requirements The concentrated water 502 from the precision filter is returned to the coarse filter 1 for reuse, and the water produced by the precision filter 501 enters the reverse osmosis device 6; the reverse osmosis device 6 uses the principle of a semipermeable membrane to separate water and remove dissolved salts, bacteria, heavy metals and other substances in the water; the electrodialysis device 7 separates ions in the water through the action of an electric field. Under the action of the electric field, the dissolved ions are migrated to different electrodes, thereby achieving further purification of the water quality; the filter press equipment 9 is used to remove the electrolytic mud produced by the electrochemical electrolytic cell 4, and separate the liquid and the solid through filter press; the crystallization desalination device 11 removes anions and cations in the water through a crystallization process, causing them to precipitate in the form of salt.

[0028] The present invention uses multi-stage water treatment steps, including coarse filtration, adsorption, evaporation and condensation, precision filtration, reverse osmosis and electrodialysis technologies, to effectively remove solid impurities, organic matter, salt and other pollutants in water, thereby achieving multiple recycling of wastewater, reducing dependence on external water sources and improving the comprehensive utilization efficiency of water resources.

[0029] Exemplarily, the adsorption device 2 is a packed tower or filter bed containing activated carbon; the precision filter 5 is a ceramic filter; and the electrodialysis device 7 is an electrodialysis reversal device.

[0030] The present invention also includes an industrial circulating water tower pool 10; the industrial circulating water tower pool 10 is connected to the reverse osmosis device 6 and the electrodialysis device 7 respectively, and the industrial circulating water tower pool 10 is used to receive and store the water produced by the reverse osmosis device 602 and the water produced by the electrodialysis device 702, so as to realize the recycling of water resources.

[0031] The present invention also includes a DCS centralized control system 12; the coarse filtration filter 1, the adsorption device 2, the thermoelectric conversion module 3, the electrochemical electrolysis cell 4, the precision filter 5, the reverse osmosis device 6, the electrodialysis device 7, the water pool 8, the filter press equipment 9, the industrial circulating water tower pool 10 and the crystallization desalination device 11 are all electrically connected to the DCS centralized control system 12; all switches and start-stop signals in the industrial circulating water treatment system of the present invention are controlled by the DCS centralized control system 12, which reduces manual intervention and improves the system automation level.

[0032] like Figure 2 As shown, the thermoelectric conversion module 3 includes an evaporator 31, a compressor 32, a condenser 33 and an expansion valve 34; the adsorption device 2 is connected to the evaporator 31; the evaporator 31 is connected to the electrochemical electrolytic cell 4; the evaporator 31 is provided with a medium inlet, a medium outlet, a third water inlet and a third water outlet; the evaporator 31 is connected to the adsorption device 2 through the third water inlet; the evaporator 31 is connected to the electrochemical electrolytic cell 4 through the third water outlet; the compressor 32 is connected to the evaporator 31 through the medium outlet; the expansion valve 34 is connected to the evaporator 31 through the medium inlet; the compressor 32 and the expansion valve 34 are both connected to the condenser 33; wherein the evaporator 31, the compressor 32, the condenser 33 and the expansion valve 34 form a closed pipeline; a heat transfer medium is arranged in the pipeline. The evaporator 31 absorbs heat from the adsorption device produced water 201 with residual temperature through heat exchange, thereby evaporating (gasifying) the heat transfer medium. The compressor 32 is used to compress the evaporated gas into high-temperature and high-pressure gas. The condenser 33 cools the high-temperature and high-pressure gas sent by the compressor 32 and condenses it into a liquid state. Through the cooling process, the heat in the heat transfer medium is released, and the gas gradually loses heat and becomes liquid. The expansion valve 34 throttles the liquid heat transfer medium output from the condenser 33, causing the temperature and pressure to drop sharply when passing through the expansion valve 34, and then introduces the liquid medium into the evaporator 31 through the medium inlet, turning it into a low-temperature and low-pressure gas.

[0033] The thermoelectric conversion module 3 further includes a molten salt heater 35, a high-temperature molten salt storage tank 36, a high-temperature molten salt pump 37, a molten salt water heat exchanger 38, a low-temperature molten salt storage tank 39 and a low-temperature molten salt pump 310 which are connected in sequence; the condenser 33 is provided with a molten salt inlet and a molten salt outlet; the molten salt heater 35 is connected to the condenser 33 through the molten salt outlet; the low-temperature molten salt pump 310 is connected to the condenser 33 through the molten salt inlet. The heat released by the condenser 33 is used to preheat the low-temperature molten salt to reduce the subsequent heating power consumption; when the electricity consumption is low, the low-cost electricity is used to reheat the low-temperature molten salt in the molten salt heater 35 to form a high-temperature molten salt and store it in the high-temperature molten salt storage tank 36. After the molten salt water heat exchanger 38, the high-temperature molten salt releases heat energy to achieve heat exchange. After the heat exchange, the low-temperature molten salt is formed and stored in the low-temperature molten salt storage tank 39, and is pumped to the condenser 33 by the low-temperature molten salt pump 310 for a new round of heat exchange cycle.

[0034] The molten salt heater 35 is electrically connected to the transformer substation 311; the transformer substation 311 is electrically connected to the power grid 312. The transformer substation 311 converts the high voltage power from the power grid 312 into low voltage power suitable for the heater, so that the molten salt heater 35 obtains a stable power supply. When the power consumption is low, the molten salt in the molten salt heater 35 is heated again using low-priced electricity.

[0035] The molten salt water heat exchanger 38 is electrically connected to the thermal power generation user 313. The molten salt water heat exchanger 38 heats the low-temperature water of the thermal power generation user 313 into steam and then generates power to achieve thermoelectric conversion. Secondly, the thermal power generation user 313 only generates electricity through energy storage during peak electricity consumption, ensuring maximum benefits while preventing energy waste.

[0036] The second object of the present invention is to provide an intelligent industrial circulating water treatment method, comprising: The industrial circulating water is filtered through the coarse filter 1 to filter solid impurities and suspended matter, and the coarse filter concentrated water 102 is discharged to the pool 8. The filtered coarse filter water 101 is adsorbed by the adsorption device 2 to remove organic matter, and the adsorption device water 201 transfers heat to the evaporator 31. The heat transfer medium in the pipeline of the evaporator 31 absorbs the heat of the low-temperature heat source in the evaporator 31 and evaporates, and is then compressed by the compressor 32 into high-temperature and high-pressure gas to enter the condenser 33 to release heat, and finally returns to the evaporator 31 after the pressure is reduced by the expansion valve 34; the low-temperature molten salt pump 310 transfers the low-temperature molten salt The low-temperature molten salt in the storage tank 39 is transported to the condenser 33, and is heated to medium-temperature molten salt after heat exchange with the high-temperature and high-pressure gas in the condenser 33. The molten salt in the molten salt heater 35 is heated for the second time by the substation 311. After heating, the molten salt is collected in the high-temperature molten salt storage tank 36. The high-temperature molten salt is passed into the molten salt water heat exchanger 38 for heat exchange by the high-temperature molten salt pump 37. The molten salt water heat exchanger 38 heats the low-temperature water of the thermal power generation user 313 into steam and then generates power, thereby realizing thermoelectric conversion. The high-temperature molten salt after heat exchange is then stored in the low-temperature molten salt storage tank 3 9; the water 301 of the thermoelectric conversion module is passed into the electrochemical electrolytic cell 4, and after direct electrolysis, a certain amount of mixed floccules of organic pollutants and salts are produced in the electrolytic cell, and the electrolytic cell sludge 402 produced by the electrochemical electrolytic cell 4 is subjected to filter pressing treatment by the filter press equipment 9; the water 401 produced by the electrochemical electrolytic cell is introduced into the precision filter 5 for precision filtration, and the concentrated water 502 of the precision filter is returned to the coarse filter 1 for repeated use; the water 501 produced by the precision filter is introduced into the reverse osmosis device 6 for reverse osmosis treatment, and the concentrated water 601 of the reverse osmosis device and The reverse osmosis device produces water 602, wherein the reverse osmosis device produced water 602 enters the industrial circulating water tower pool 10 for recycling, and the reverse osmosis device concentrated water 601 is introduced into the electrodialysis device 7 for electrodialysis treatment to obtain electrodialysis device concentrated water 701 and electrodialysis device produced water 702, wherein the electrodialysis device produced water 702 enters the industrial circulating water tower pool 10 for recycling; the electrodialysis device concentrated water 701 is introduced into the crystallization desalination device 11, and the anions and cations in the water are precipitated in the form of crystallized salts, and the precipitated solid crystals are packaged and shipped out.

[0037] For example, the temperature of the water produced by the adsorption device 201 is 30° C. to 60° C., and the temperature of the water output by the thermoelectric conversion module 301 is 10° C. to 40° C. The electrolysis treatment time of the electrochemical electrolysis cell 4 is 30-60 minutes.

[0038] The present invention adopts electrochemical electrolysis technology to electrochemically electrolyze industrial circulating water, removes organic matter in the water body of industrial circulating water, and makes the equipment of industrial circulating water no longer adhered by organic matter, thereby solving the problem of reducing heat exchange capacity after scaling on the cooling system pipes or cooling plates of industrial circulating water equipment, thereby improving the heat exchange efficiency of industrial circulating water equipment, and also solving the problem of needing to add chemical agents to achieve anti-scaling, anti-corrosion, sterilization and algae removal in the prior art, realizing the recycling of industrial circulating water, zero sewage discharge, no manual management, and the operation of equipment is automatically controlled by the control module; in addition, the present invention can remove chloride ions in industrial circulating water without adding drugs, and the recovery rate of wastewater is high. The small amount of sewage generated can be used for flushing toilets, ore cleaning, watering and dust removal, and water resources are effectively utilized; in addition, the present invention also enriches low-grade heat through the thermoelectric conversion module 3, heats molten salt, and realizes the recycling and reuse of waste heat of industrial circulating water, thereby improving the overall energy utilization rate of the system, reducing energy consumption, and having significant energy-saving, environmental protection and economic benefits.

[0039] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An intelligent industrial circulating water treatment system, characterized in that: The invention comprises a coarse filter (1), an adsorption device (2), a thermoelectric conversion module (3), an electrochemical electrolysis cell (4), a precision filter (5), a reverse osmosis device (6), an electrodialysis device (7), a water pool (8), a filter press (9) and a crystallization desalination device (11); the coarse filter (1) is provided with a first water inlet, a second water inlet, a first water outlet and a second water outlet; the first water outlet is connected to the water pool (8); the second water outlet is connected to the adsorption device (2); the adsorption device (2) is connected to a thermoelectric conversion module (3); the thermoelectric conversion module (3) is connected to an electrochemical electrolytic cell (4); the electrochemical electrolytic cell (4) is respectively connected to a precision filter (5) and a filter press (9); the precision filter (5) is connected to a reverse osmosis device (6); the precision filter (5) is connected to a coarse filter (1) via a second water inlet; the reverse osmosis device (6) is connected to an electrodialysis device (7); and the electrodialysis device (7) is connected to a crystallization desalination device (11).

2. An intelligent industrial circulating water treatment system according to claim 1, characterized in that: It also includes an industrial circulating water tower pool (10); the industrial circulating water tower pool (10) is connected to the reverse osmosis device (6) and the electrodialysis device (7) respectively.

3. An intelligent industrial circulating water treatment system according to claim 2, characterized in that: It also includes a DCS centralized control system (12); the coarse filter (1), the adsorption device (2), the thermoelectric conversion module (3), the electrochemical electrolysis cell (4), the precision filter (5), the reverse osmosis device (6), the electrodialysis device (7), the water pool (8), the filter press equipment (9), the industrial circulating water tower pool (10) and the crystallization desalination device (11) are all electrically connected to the DCS centralized control system (12).

4. The intelligent industrial circulating water treatment system according to claim 1 is characterized in that: The thermoelectric conversion module (3) comprises an evaporator (31), a compressor (32), a condenser (33) and an expansion valve (34); the adsorption device (2) is connected to the evaporator (31); the evaporator (31) is connected to the electrochemical electrolytic cell (4); the evaporator (31) is provided with a medium inlet, a medium outlet, a third water inlet and a third water outlet; the evaporator (31) is connected to the adsorption device (2) via the third water inlet; the evaporator (31) is connected to the electrochemical electrolytic cell (4) via the third water outlet; the compressor (32) is connected to the evaporator (31) via the medium outlet; the expansion valve (34) is connected to the evaporator (31) via the medium inlet; the compressor (32) and the expansion valve (34) are both connected to the condenser (33); wherein the evaporator (31), the compressor (32), the condenser (33) and the expansion valve (34) form a closed pipeline; a heat transfer medium is provided in the pipeline.

5. An intelligent industrial circulating water treatment system according to claim 4, characterized in that: The thermoelectric conversion module (3) further comprises a molten salt heater (35), a high-temperature molten salt storage tank (36), a high-temperature molten salt pump (37), a molten salt water heat exchanger (38), a low-temperature molten salt storage tank (39) and a low-temperature molten salt pump (310) which are connected in sequence; the condenser (33) is provided with a molten salt inlet and a molten salt outlet; the molten salt heater (35) is connected to the condenser (33) via the molten salt outlet; and the low-temperature molten salt pump (310) is connected to the condenser (303) via the molten salt inlet.

6. An intelligent industrial circulating water treatment system according to claim 5, characterized in that: The molten salt heater (35) is electrically connected to the transformer substation (311); and the transformer substation (311) is electrically connected to the power grid (312).

7. An intelligent industrial circulating water treatment system according to claim 5, characterized in that: The molten salt water heat exchanger (38) is electrically connected to a thermal energy power generation user (313).

8. An intelligent industrial circulating water treatment method, characterized in that: The system according to any one of claims 1 to 7 comprises: Industrial circulating water is filtered through a coarse filter (1) for solid impurities and suspended solids, and the coarse filter concentrate (102) is discharged into a water pool (8). The filtered coarse filter product water (101) is adsorbed and removed of organic matter by an adsorption device (2). The adsorption device product water (201) is introduced into a thermoelectric conversion module (3) for heat exchange treatment. The thermoelectric conversion module outlet water (301) is introduced into an electrochemical electrolytic cell (4). After direct electrolysis, a certain amount of mixed floccules of organic pollutants and salts are generated in the electrolytic cell. The electrolytic cell sludge (402) generated by the electrochemical electrolytic cell (4) is subjected to filter pressing treatment by a filter press device (9). The electrochemical electrolytic cell product water (401) is introduced into a precision filter (5) for precision filtration. The precision filter concentrate (502) returns to the coarse filter (1) for further treatment. The water produced by the precision filter (501) is introduced into a reverse osmosis device (6) for reverse osmosis treatment to obtain reverse osmosis device concentrated water (601) and reverse osmosis device produced water (602), wherein the reverse osmosis device produced water (602) enters an industrial circulating water tower pool (10) for recycling; the reverse osmosis device concentrated water (601) is introduced into an electrodialysis device (7) for electrodialysis treatment to obtain electrodialysis device concentrated water (701) and electrodialysis device produced water (702), wherein the electrodialysis device produced water (702) enters an industrial circulating water tower pool (10) for recycling; the electrodialysis device concentrated water (701) is introduced into a crystallization desalination device (11), and anions and cations in the water are precipitated in the form of crystallized salts, and the precipitated solid crystals are packaged and transported out.

9. An intelligent industrial circulating water treatment method according to claim 8, characterized in that: The specific steps of introducing the water produced by the adsorption device (201) into the thermoelectric conversion module (3) for heat exchange treatment are as follows: the water produced by the adsorption device (201) transfers heat to the evaporator (31), the heat transfer medium in the pipeline of the evaporator (31) absorbs heat from the low-temperature heat source in the evaporator (31) and evaporates, and is then compressed by the compressor (32) into high-temperature and high-pressure gas to enter the condenser (33) to release heat, and finally returns to the evaporator (31) after reducing the pressure through the expansion valve (34); The low-temperature molten salt pump (310) transports the low-temperature molten salt in the low-temperature molten salt storage tank (39) to the condenser (33), and heats the low-temperature molten salt with the high-temperature and high-pressure gas in the condenser (33) to form medium-temperature molten salt. The molten salt in the molten salt heater (35) is reheated by the substation (311). After heating, the molten salt is collected in the high-temperature molten salt storage tank (36). The high-temperature molten salt is passed into the molten salt water heat exchanger (38) for heat exchange by the high-temperature molten salt pump (37). The molten salt water heat exchanger (38) heats the low-temperature water of the thermal power generation user (313) into steam and then generates power, thereby realizing thermoelectric conversion. The high-temperature molten salt after heat exchange is stored in the low-temperature molten salt storage tank (39).

10. An intelligent industrial circulating water treatment method according to claim 8, characterized in that: The temperature of the water produced by the adsorption device (201) is 30°C to 60°C; the temperature of the water output (301) from the thermoelectric conversion module is 10°C to 40°C.

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