Geothermal recharge water multi-effect treatment system

Abstract

The invention relates to a geothermal recharge water multi-effect treatment system, which comprises a desanding and filtering unit, a water supply unit, a water supply unit and a water supply unit, wherein the desanding and filtering unit is used for discharging impurity particles in geothermal water; the water inlet and the water outlet are located on the two sides of the tank body, the spiral pipe is located in the tank body, can rotate and enables impurity particles to be separated from water, and the drain outlet is located at the bottom of the tank body and used for discharging the impurity particles. The high-frequency electric field generating unit is located on the inner wall of the tank body and used for removing old scales in geothermal water and inhibiting generation of new scales, and a middle electrostatic field formed by the high-frequency electric field generating unit is parallel to the direction of the water inlet; the ultrasonic degassing unit is positioned on the inner wall of the tank body and is used for removing dissolved oxygen in geothermal water; and the ultraviolet sterilization unit is positioned in the water outlet. Compared with the prior art, the device has the advantages of integrating the functions of sand removal, scale removal and prevention, sterilization, degassing and the like.

Description

Technical Field

[0001] The invention relates to the technical field of geothermal reinjection water treatment, and in particular to a geothermal reinjection water multi-effect treatment system. Background Art

[0002] With the continuous expansion and deepening of geothermal energy development and utilization, the pressure of geothermal reservoirs has decreased, and the geological environment and ecology have been affected. In order to achieve the sustainable utilization of geothermal energy resources, geothermal water recharge must be combined with the characteristics of the heat storage, that is, geothermal tail water or normal temperature groundwater is injected into the heat storage to achieve a balance between extraction and injection, and avoid problems such as reduced heat storage pressure, reduced production capacity, reduced produced fluid temperature, tail water discharge and formation subsidence. However, in the process of geothermal water recharge, different types of physical or chemical blockages usually occur, such as suspended matter blockage, gas blockage, microbial blockage, chemical precipitation blockage, viscous particle expansion and particle reorganization, which causes the recharge efficiency to decay, manifested as high recharge pressure and reduced recharge volume. Blockage phenomena such as suspended matter, chemical precipitation and clay expansion of geothermal recharge water can be treated by sand removal and filtration before geothermal water recharge.

[0003] Among them, geothermal tail water gas blockage refers to the release of associated gases in geothermal tail water due to changes in temperature, pressure, etc., or gas blockage caused by bubbles trapped by heat storage. One of the sources of gas blockage in geothermal water is gases such as oxygen and carbon dioxide carried in the reinjection water. Therefore, it is necessary to adopt certain methods to remove some of the gas to prevent the occurrence of gas blockage during the reinjection of geothermal water. Microbial blockage in geothermal water refers to the biofilm deposition produced by the reproduction of microorganisms in the reinjection water, which reduces the permeability of porous media and causes blockage of medium pores in the reinjection system. Microorganisms that usually cause blockage in reinjection water include iron bacteria, sulfate-reducing bacteria and saprophytes, among which saprophytes are widely grown in formations, and sulfate-reducing bacteria are widely found in formation water rich in sulfate.

[0004] One of the effective ways to solve the above problems is to treat the water quality of the geothermal recharge water system. However, the current conventional method in the industry is to connect and treat the water through a series of structures, water pumps, water treatment equipment and pipelines, such as Figure 1 As shown. The on-site implementation conditions of the geothermal reinjection water system are limited, the construction is difficult, and the construction period is long. The integrity and compatibility of the entire treatment system are difficult to achieve the expected results. In addition, the traditional treatment method does not professionally remove the gas in the geothermal water, and the traditional geothermal reinjection water system treatment method has certain disadvantages. Therefore, the integration of the treatment equipment is particularly prominent. Summary of the invention

[0005] The purpose of the present invention is to overcome the defects of the above-mentioned prior art and to provide an integrated geothermal reinjection water multi-effect treatment system which integrates the functions of sand removal, scale removal and anti-scaling, sterilization and degassing.

[0006] The purpose of the present invention can be achieved by the following technical solutions:

[0007] A geothermal reinjection water multi-effect treatment system, the treatment system comprising:

[0008] A sand removal and filtration unit for discharging foreign particles in geothermal water, comprising a tank body, a water inlet and a water outlet located on both sides of the tank body, a spiral tube located inside the tank body and rotatable to separate foreign particles from water, and a sewage outlet located at the bottom of the tank body and used to discharge foreign particles;

[0009] A high-frequency electric field generating unit located on the inner wall of the tank and used to remove old scale in geothermal water and inhibit the generation of new scale, wherein the central electrostatic field formed by the unit is parallel to the direction of the water inlet;

[0010] An ultrasonic degassing unit located on the inner wall of the tank and used to remove dissolved oxygen in the geothermal water;

[0011] and an ultraviolet sterilization unit located in the water outlet.

[0012] Furthermore, the height of the water outlet is higher than the height of the water inlet;

[0013] The height of the ultrasonic degassing unit is located between the water inlet and the water outlet;

[0014] The high-frequency electric field generating unit is located below the water inlet.

[0015] Furthermore, a sediment chamber is provided at the bottom of the spiral tube, and the sediment chamber is connected to the sewage outlet.

[0016] Furthermore, the high-frequency electric field generating unit is arranged between the sediment chamber and the water inlet.

[0017] Furthermore, the spiral tube is located at the center of the tank body. The spiral tube is hollow, and its upper and lower ends are respectively provided with connectors connected to the tank body, so that the spiral tube is rotatably connected to the tank body, so that after water enters from the water inlet, the water flow drives the spiral tube to rotate.

[0018] Furthermore, the spiral tube is a three-dimensional mesh structure, which is made by welding copper wires.

[0019] Furthermore, the principle of the sand removal filter unit is that the spiral tube generates a static area in the tank body, so that all large and small particles have enough residence time to settle to the bottom of the tank body and collect in the sediment chamber. According to the principle of centrifugal sedimentation and density difference, when sewage enters the tank body tangentially from the water inlet under a certain pressure, it generates a strong rotational motion through the rotation of the spiral tube. Due to the different densities of impurity particles and water, under the combined action of centrifugal force, centripetal force and other forces, the water with low density rises and is discharged from the water outlet. The impurity particles with high density will be separated through the screen of the spiral tube and continuously discharged to the sediment chamber along the spiral tube and discharged from the sewage outlet at the bottom of the tank body. When the solid pollutants of impurity particles with high density are separated from the water, the pressure drop in the tank body remains unchanged, so no blockage occurs. When the system is operating normally, the impurity particles can be discharged from the tank body through the sewage valve. Since the sediment chamber equipped with the sand removal filter unit has a large enough volume, it only needs to be discharged regularly.

[0020] Furthermore, the high-frequency electric field generating unit includes a generator and a high-frequency electric field generating electrode installed on the side wall of the tank body, and the high-frequency electric field generating electrode includes a high-frequency electric field positive electrode and a high-frequency electric field negative electrode which are relatively arranged on one side of the inner wall of the tank body to form an electrostatic field, and the high-frequency electric field positive electrode is connected to the positive lead-out terminal of the generator, and the high-frequency electric field negative electrode is connected to the negative lead-out terminal of the generator.

[0021] Furthermore, the working principle of the high-frequency electric field generating unit is as follows: the high-frequency electric field generating unit is used to remove old scale in geothermal water and inhibit the generation of new scale. The high-frequency electric field positive electrode and the high-frequency electric field negative electrode generate a high-energy central electrostatic field, which causes water molecules to resonate, and changes the hydrogen-bonded water molecule clusters into single polarity, thus changing the activation of water. These extremely small water molecules can penetrate, surround, dissolve, and remove old scale in the system, making the Ca in the water 2+ Mg 2+ and CO3 2- , collide with each other to form soft and special aragonite crystals. Since these crystals have no charge on the surface, they will no longer be adsorbed on the tank body, spiral tube or other equipment structure, thus achieving the purpose of descaling and preventing scale.

[0022] Furthermore, the ultrasonic degassing unit is an ultrasonic generator.

[0023] Furthermore, the working principle of the ultrasonic generator is as follows: when ultrasonic waves are introduced into a solution, alternating pressure is generated, and sound waves above the cavitation threshold can generate cavitation bubbles when propagating in the liquid, and can significantly increase the mass transfer rate of gas from the solution to the bubbles. Cavitation bubbles are generated by tiny gas nuclei in the solution, and these cavitation bubbles are generated due to the tensile stress in the rarefied phase of the sound wave. If the tensile stress continues to exist after the cavitation bubbles are formed, the cavitation bubbles will expand to many times the initial size. In this case, the cavitation bubbles maintain a spherical structure, and then continue to grow, vibrate, and collapse.

[0024] When ultrasound acts in the liquid phase, the gas components in the solution can enter the cavitation bubbles through the gas-liquid interface through "directional diffusion". The cavitation bubbles enter the growth stage. When the cavitation bubbles rise to the surface of the solution and collapse, the gas will escape from the bubbles, which causes degassing. Generally speaking, ultrasonic liquid phase degassing can be divided into three stages: ① Cavitation bubble nucleation stage, that is, the growth stage generated by the diffusion of gas molecules from the solution to the bubbles; ② The stage where bubbles gather to form large bubbles; ③ The escape stage where large bubbles float to the liquid surface and collapse.

[0025] Furthermore, the ultraviolet sterilization unit is a medium-pressure ultraviolet sterilizer. The use of medium-pressure ultraviolet can achieve the purpose of higher efficiency, greater durability and greater safety. When bacteria are irradiated by ultraviolet rays, their internal DNA structure will be destroyed, thereby destroying their reproductive ability and causing their death. In addition, the high-frequency electric field generating unit and the ultrasonic degassing unit also play an auxiliary role in sterilization. The high-energy electric field generated by the high-frequency electric field generating unit changes the living environment of bacteria and algae cells, causing them to lose their living conditions and die, thereby having the effect of sterilization and algae removal. Under the action of the ultrasonic wave of the ultrasonic degassing unit, the free radicals generated during the ultrasonic cavitation process damage the bacterial cell membrane, causing the contents on the bacterial surface to leak from the local damage point, resulting in the decomposition of the bacterial structure from the outside to the inside. At the same time, combined with the damage of ultraviolet rays to bacterial DNA, the bacteria collapse and die, further improving the sterilization efficiency.

[0026] Furthermore, the treatment system also includes water quality monitoring units located at the water inlet and the water outlet respectively, and a gas detection unit located at the top of the tank body.

[0027] Furthermore, the water quality monitoring unit is used to monitor the turbidity, TDS, and dissolved oxygen concentration values ​​of the inlet and outlet water of the geothermal multi-effect treatment system, and the water quality monitoring unit includes a first dissolved oxygen detector, a first TDS detector, and a first turbidity detector located at the water inlet, and a second dissolved oxygen detector, a second TDS detector, and a second turbidity detector located at the water outlet, which are used to monitor the inlet and outlet water quality;

[0028] The gas detection unit is used to monitor the concentration values ​​of H2S, CO2, and CH4 gases discharged from the geothermal multi-effect treatment system. The gas detection unit includes an H2S gas detector, a CO2 gas detector, and a CH4 gas detector.

[0029] Furthermore, the treatment system also includes a control unit connected to the sand removal and filtration unit, the high-frequency electric field generating unit, the ultrasonic degassing unit, the medium-pressure ultraviolet sterilization unit, the water quality monitoring unit, and the gas detection unit.

[0030] Furthermore, the control unit is a PLC control. When used in conjunction with the water quality monitoring unit, it can control the operation status of other units in a chain manner, and can automatically adjust the intensity of the high-frequency electric field generated by the high-frequency electric field generating unit and the ultrasonic frequency of the ultrasonic degassing unit according to the turbidity, TDS, and dissolved oxygen concentration of the inlet and outlet water detected by the water quality monitoring unit, so as to achieve the purpose of dynamic and automatic operation of the geothermal multi-effect treatment system.

[0031] Furthermore, the control process of the processing system is:

[0032] The water quality monitoring unit detects the turbidity, TDS, and dissolved oxygen concentration of the inlet and outlet water, and transmits signals to the control unit. When it is detected that the turbidity, TDS, and dissolved oxygen concentration of the inlet and outlet water reach or exceed the set value, the control unit controls the high-frequency electric field generating unit to increase the voltage and the ultrasonic degassing unit to increase the frequency.

[0033] Furthermore, the control unit is an integrated control, which uses a Siemens automatic programmable controller as a main control device. The control unit also includes a touch screen, which serves as a human-machine information exchange tool and realizes full automatic operation of the equipment by monitoring the operating data of the system.

[0034] Furthermore, a cabinet is arranged outside the tank, and the touch screen is installed on the cabinet.

[0035] Compared with the prior art, the present invention has the following advantages:

[0036] (1) The multi-effect treatment system of the present invention integrates different functional units into one, which can solve various problems of the system. The equipment has a compact structure, shares the equipment housing and system control, reduces the number of equipment and pipeline components, occupies a small area, helps to reduce manufacturing costs and on-site construction costs, and achieves the purpose of reducing costs and increasing efficiency. At the same time, it makes the operation more intelligent and can realize unattended operation.

[0037] (2) The multi-effect treatment system of the present invention not only has the sand removal and degassing functions of the traditional geothermal reinjection water system, but also adds anti-scaling and sterilization functions, which plays a positive role in stabilizing the water quality of the geothermal reinjection water system and effectively overcomes the problem of the lack of geothermal anti-scaling and sterilization effects in the traditional geothermal reinjection water system.

[0038] (3) The multi-effect treatment system of the present invention solves the problems of the traditional geothermal reinjection water system, such as long treatment process, many types of equipment, and large system footprint. By integrating various functional units, the cost of geothermal reinjection water system treatment is greatly reduced and the geothermal reinjection water system footprint is reduced.

[0039] (4) The multi-effect treatment system of the present invention integrates different functional units into one, without the need to set up multiple devices. Compared with the segmented process design of the traditional geothermal reinjection water system, it reduces the signal transmission loss and solves the defects of diversity and non-standardization of the traditional geothermal reinjection water system.

[0040] (5) The multi-effect treatment system of the present invention integrates a PLC control system, which realizes water quality monitoring, gas monitoring, and automatic adjustment functions. The equipment can monitor water quality changes in real time and automatically adjust operating parameters according to preset programs to ensure stable water quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 Flow chart of the traditional geothermal water recharge system;

[0042] Figure 2 is a flow chart of the processing system shown in Example 1;

[0043] Figure 3 It is a structural schematic diagram of the processing system shown in Example 2;

[0044] Figure 4 is a schematic diagram of the internal structure of the processing system shown in Example 2;

[0045] Figure 5 is a structural block diagram of the processing system shown in Example 3;

[0046] Figure 6 is a schematic diagram of the structure of the processing system shown in Example 3;

[0047] Figure 7 It is a top view of the treatment system shown in Example 3, the solid line is the water flow direction, and the dotted line is the electric field direction;

[0048] Figure 8 It is a front view of the external cabinet of the processing system shown in Example 3;

[0049] Fig. 9 It is a rear view of the external cabinet of the processing system shown in Example 3;

[0050] Fig.10 It is a left side view of the external cabinet of the processing system shown in Example 3;

[0051] Fig.11 This is a right side view of the external cabinet of the processing system shown in Example 3.

[0052] Description of the markings in the figure:

[0053] 1-sand removal and filtration unit, 11-tank body, 12-water inlet, 13-water outlet, 14-spiral pipe, 15-drainage outlet, 16-sludge chamber;

[0054] 2-high frequency electric field generating unit, 21-high frequency electric field positive electrode, 22-high frequency electric field negative electrode;

[0055] 3-Ultrasonic degassing unit;

[0056] 4-Medium pressure UV sterilization unit;

[0057] 5-water quality monitoring unit, 51-first dissolved oxygen detector, 52-first TDS detector, 53-first turbidity detector, 54-second dissolved oxygen detector, 55-second TDS detector, 56-second turbidity detector;

[0058] 6- Gas detection unit;

[0059] 7- Control unit;

[0060] 8-cabinet;

[0061] 91 - a first coarse filter, 92 - a first fine filter, 93 - an exhaust tank, 94 - a first boosting pump, 95 - a second boosting pump, 96 - a second coarse filter, 97 - a second fine filter. DETAILED DESCRIPTION

[0062] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. The embodiments are implemented based on the technical solution of the present invention, and detailed implementation methods and specific operation processes are given, but the protection scope of the present invention is not limited to the following embodiments. In the following embodiments or examples, if there is no special description of the functional components or structures, it means that they are all conventional components or conventional structures used in the art to achieve the corresponding functions.

[0063] It should be noted that in the description of the present invention, the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0064] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" 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 communication 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.

[0065] In the following embodiments, the first dissolved oxygen detector and the second dissolved oxygen detector adopt the Leimagnet portable dissolved oxygen meter JPBJ-608, the first TDS detector and the second TDS detector adopt the Masnet turbidity meter S-TUB-A1P, and the gas detection unit 6 adopts the Wanandi composite gas detector FIX800-3X-NA, which can detect H2S, CO2, CH4, etc.

[0066] A geothermal reinjection water multi-effect treatment system, the treatment system comprising:

[0067] A sand removal and filtration unit 1 for discharging impurity particles in geothermal water, comprising a tank body 11, a water inlet 12 and a water outlet 13 located on both sides of the tank body 11, a spiral tube 14 located inside the tank body 11 and rotatable to separate impurity particles from water, and a sewage outlet 15 located at the bottom of the tank body 11 and used to discharge impurity particles;

[0068] A high-frequency electric field generating unit 2 is located on the inner wall of the tank 11 and is used to remove old scale in the geothermal water and inhibit the generation of new scale. The central electrostatic field formed by the unit is parallel to the direction of the water inlet 12.

[0069] An ultrasonic degassing unit 3 located on the inner wall of the tank 11 and used to remove dissolved oxygen in the geothermal water;

[0070] And an ultraviolet sterilization unit 4 is located in the water outlet 13 .

[0071] In some specific embodiments, the height of the water outlet 13 is higher than the height of the water inlet 12;

[0072] The height of the ultrasonic degassing unit 3 is located between the water inlet 12 and the water outlet 13;

[0073] The high-frequency electric field generating unit 2 is located below the water inlet 12 .

[0074] In some specific implementations, a sediment chamber 16 is disposed at the bottom of the spiral tube 14 , and the sediment chamber 16 is connected to the sewage outlet 15 .

[0075] In some specific embodiments, the high-frequency electric field generating unit is disposed between the sediment chamber and the water inlet.

[0076] In some specific embodiments, the spiral tube 14 is located at the center of the tank body 11. The spiral tube 14 is hollow, and its upper and lower ends are respectively provided with connectors connected to the tank body 11, so that the spiral tube 14 is rotatably connected to the tank body 11, so that after water enters from the water inlet, the water flow drives the spiral tube 14 to rotate.

[0077] In some specific implementations, the spiral tube 14 is a three-dimensional mesh structure, which is made by welding copper wires.

[0078] In some specific embodiments, the principle of the sand removal filter unit 1 is that the spiral tube 14 generates a static area in the tank body 11, so that all large and small particles have enough residence time to settle to the bottom of the tank body 11 and collect in the sediment chamber 16. According to the principle of centrifugal sedimentation and density difference, when sewage enters the tank body 11 tangentially from the water inlet 12 under a certain pressure, it generates a strong rotational motion through the rotation of the spiral tube 14. Due to the different densities of impurity particles and water, under the combined action of centrifugal force, centripetal force and other forces, the water with low density rises and is discharged from the water outlet 13. Impurity particles with high density will be separated through the screen of the spiral tube 14, and continuously discharged to the sediment chamber 16 along the spiral tube 14, and discharged from the sewage outlet 15 at the bottom of the tank body 11. When the solid pollutants of impurity particles with high density are separated from the water, the pressure drop in the tank body 11 remains unchanged, so no blockage occurs. When the system is operating normally, the impurity particles can be discharged from the tank body 11 through the sewage valve. Since the sediment chamber 16 equipped in the sand removal and filtration unit 1 has a sufficiently large volume, it only needs to be discharged regularly.

[0079] In some specific embodiments, the high-frequency electric field generating unit 2 includes a generator and a high-frequency electric field generating electrode installed on the side wall of the tank body 11, and the high-frequency electric field generating electrode includes a high-frequency electric field positive electrode 21 and a high-frequency electric field negative electrode 22 which are relatively arranged on one side of the inner wall of the tank body 11 to form an electrostatic field, and the high-frequency electric field positive electrode 21 is connected to the positive lead-in terminal of the generator, and the high-frequency electric field negative electrode 22 is connected to the negative lead-in terminal of the generator.

[0080] In some specific embodiments, the high-frequency electric field positive electrode 21 and the high-frequency electric field negative electrode 22 are arranged on both sides of the water inlet 12 and the water outlet 13, and the electric field formed is perpendicular to the direction of water entering the water inlet 12.

[0081] In some specific embodiments, the working principle of the high-frequency electric field generating unit 2 is as follows: the high-frequency electric field generating unit 2 is used to remove old scale in geothermal water and inhibit the generation of new scale. The high-frequency electric field positive electrode 21 and the high-frequency electric field negative electrode 22 generate a high-energy central electrostatic field to cause water molecules to resonate, turning hydrogen-bonded water molecules into single polarity, changing the activation of water. These extremely small water molecules can penetrate, surround, dissolve, and remove old scale in the system, making Ca in the water 2+ Mg 2+ and CO3 2- , collide with each other to form soft special aragonite crystals. Since these crystal surfaces have no charge, they are no longer adsorbed on the tank body 11, the spiral tube 14 or other equipment structures, thereby achieving the purpose of descaling and preventing scale.

[0082] In some specific embodiments, the ultrasonic degassing unit 3 is an ultrasonic generator.

[0083] In some specific embodiments, the working principle of the ultrasonic generator is as follows: when ultrasonic waves are introduced into a solution, alternating pressure is generated, and sound waves above the cavitation threshold can generate cavitation bubbles when propagating in the liquid, and can significantly increase the mass transfer rate of gas from the solution to the bubbles. Cavitation bubbles are generated by tiny gas nuclei in the solution. These cavitation bubbles are generated due to the tensile stress in the rarefied phase of the sound wave. If the tensile stress (i.e., negative pressure) continues to exist after the cavitation bubbles are formed, the cavitation bubbles will expand to many times their initial size. In this case, the cavitation bubbles maintain a spherical structure, and then continue to grow, vibrate, and collapse.

[0084] When ultrasound acts in the liquid phase, the gas components in the solution can enter the cavitation bubbles through the gas-liquid interface through "directional diffusion". The cavitation bubbles enter the growth stage. When the cavitation bubbles rise to the surface of the solution and collapse, the gas will escape from the bubbles, which causes degassing. Generally speaking, ultrasonic liquid phase degassing can be divided into three stages: ① Cavitation bubble nucleation stage, that is, the growth stage generated by the diffusion of gas molecules from the solution to the bubbles; ② The stage where bubbles gather to form large bubbles; ③ The escape stage where large bubbles float to the liquid surface and collapse.

[0085] In some specific embodiments, the ultraviolet sterilization unit 4 is a medium-pressure ultraviolet sterilizer. The use of medium-pressure ultraviolet can achieve the purpose of being more efficient, more durable and safer. When bacteria are irradiated by ultraviolet rays, the internal deoxyribonucleic acid DNA structure will be destroyed, thereby destroying its reproductive ability and causing its death. In addition, the high-frequency electric field generating unit 2 and the ultrasonic degassing unit 3 also play an auxiliary role in sterilization. The high-energy electric field generated by the high-frequency electric field generating unit 2 changes the living environment of bacteria and algae cells, causing them to lose their living conditions and die, thereby having the effect of sterilization and algae removal. Under the action of the ultrasonic wave of the ultrasonic degassing unit 3, the free radicals generated during the ultrasonic cavitation process damage the bacterial cell membrane, causing the contents on the bacterial surface to leak from the local damage point, resulting in the decomposition of the bacterial structure from the outside to the inside, and at the same time, combined with the destruction of bacterial DNA by ultraviolet rays, the bacteria collapse and die, further improving the sterilization efficiency.

[0086] In some specific embodiments, the treatment system further includes a water quality monitoring unit 5 located at the water inlet 12 and the water outlet 13 , respectively, and a gas detection unit 6 located at the top of the tank body 11 .

[0087] In some specific embodiments, the water quality monitoring unit 5 is used to monitor the turbidity, TDS, and dissolved oxygen concentration values ​​of the inlet and outlet water of the geothermal multi-effect treatment system. The water quality monitoring unit 5 includes a first dissolved oxygen detector 51, a first TDS detector 52, and a first turbidity detector 53 located at the water inlet 12, and a second dissolved oxygen detector 54, a second TDS detector 55, and a second turbidity detector 56 located at the water outlet 13, which are used to monitor the inlet and outlet water quality;

[0088] The gas detection unit 6 is used to monitor the concentration values ​​of H2S, CO2, and CH4 gases discharged from the geothermal multi-effect treatment system. The gas detection unit 6 includes an H2S gas detector, a CO2 gas detector, and a CH4 gas detector.

[0089] In some specific embodiments, the treatment system also includes a control unit 7 connected to the sand removal and filtration unit 1, the high-frequency electric field generating unit 2, the ultrasonic degassing unit 3, the medium-pressure ultraviolet sterilization unit 4, the water quality monitoring unit 5, and the gas detection unit 6.

[0090] In some specific embodiments, the control unit 7 is a PLC control. When used in conjunction with the water quality monitoring unit 5, it can control the operation status of other units in a chain manner, and can automatically adjust the intensity of the high-frequency electric field generated by the high-frequency electric field generating unit 2 and the ultrasonic frequency of the ultrasonic degassing unit 3 according to the turbidity, TDS, and dissolved oxygen concentration of the inlet and outlet water detected by the water quality monitoring unit 5, so as to achieve the purpose of dynamic and automatic operation of the geothermal multi-effect treatment system.

[0091] In some specific embodiments, the control process of the treatment system is as follows: the water quality monitoring unit 5 detects the turbidity, TDS, and dissolved oxygen concentration of the inlet and outlet water, and transmits a signal to the control unit 7. When it is detected that the turbidity, TDS, and dissolved oxygen concentration of the inlet and outlet water reach or exceed the set value, the control unit 7 controls the high-frequency electric field generating unit 2 to increase the voltage and the ultrasonic degassing unit 3 to increase the frequency.

[0092] In some specific implementations, in this embodiment, the control unit 7 is an integrated control, which uses a Siemens automatic programmable controller as a main control device. The control unit 7 also includes a touch screen 71, which serves as a human-machine information exchange tool and realizes full automatic operation of the equipment through the operating data of the monitoring system.

[0093] In some specific implementations, a cabinet 8 is disposed outside the tank 11 , and the touch screen 71 is installed on the cabinet 8 .

[0094] Example 1

[0095] A multi-effect treatment system for geothermal reinjection water, such as Figure 2 As shown, the processing system includes:

[0096] A sand removal and filtration unit 1 for discharging impurity particles in geothermal water, comprising a tank body 11, a water inlet 12 and a water outlet 13 located on both sides of the tank body 11, a spiral tube 14 located inside the tank body 11 and rotatable to separate impurity particles from water, and a sewage outlet 15 located at the bottom of the tank body 11 and used to discharge impurity particles, wherein the central electrostatic field formed by the sewage outlet 15 is perpendicular to the direction of the water inlet 12;

[0097] A high-frequency electric field generating unit 2 located on the inner wall of the tank 11 and used to remove old scale in the geothermal water and inhibit the formation of new scale;

[0098] An ultrasonic degassing unit 3 located on the inner wall of the tank 11 and used to remove dissolved oxygen in the geothermal water;

[0099] And an ultraviolet sterilization unit 4 is located in the water outlet 13 .

[0100] In this embodiment, the height of the water outlet 13 is higher than the height of the water inlet 12;

[0101] The height of the ultrasonic degassing unit 3 is located between the water inlet 12 and the water outlet 13;

[0102] The high-frequency electric field generating unit 2 is located below the water inlet 12 .

[0103] In this embodiment, a sediment chamber 16 is disposed at the bottom of the spiral tube 14 , and the sediment chamber 16 is connected to the sewage outlet 15 .

[0104] In this embodiment, the high-frequency electric field generating unit is arranged between the sediment chamber and the water inlet.

[0105] In this embodiment, the spiral tube 14 is located at the center of the tank body 11. The spiral tube 14 is hollow, and its upper and lower ends are respectively provided with connectors connected to the tank body 11, so that the spiral tube 14 is rotatably connected to the tank body 11, so that after water enters from the water inlet, the water flow drives the spiral tube 14 to rotate.

[0106] In this embodiment, the spiral tube 14 is a three-dimensional mesh structure, which is made by welding copper wires.

[0107] In this embodiment, the high-frequency electric field generating unit 2 includes a generator and a high-frequency electric field generating electrode installed on the side wall of the tank body 11. The high-frequency electric field generating electrode includes a high-frequency electric field positive electrode 21 and a high-frequency electric field negative electrode 22 which are relatively arranged on both sides of the inner wall of the tank body 11 to form a central electrostatic field. The high-frequency electric field positive electrode 21 is connected to the positive lead-in terminal of the generator, and the high-frequency electric field negative electrode 22 is connected to the negative lead-in terminal of the generator.

[0108] In this embodiment, the high-frequency electric field positive electrode 21 and the high-frequency electric field negative electrode 22 are arranged on both sides of the water inlet 12 and the water outlet 13, and the electric field formed is perpendicular to the direction of water entering the water inlet 12.

[0109] In this embodiment, the ultrasonic degassing unit 3 is an ultrasonic generator.

[0110] In this embodiment, the ultraviolet sterilization unit 4 is a medium-pressure ultraviolet sterilizer. The use of medium-pressure ultraviolet can achieve the purposes of higher efficiency, greater durability and greater safety.

[0111] The working process of the processing system of this embodiment is as follows:

[0112] Sewage enters the tank body 11 from the water inlet 12. Under the action of the rotation of the spiral tube 14, the water flows upward. Impurity particles with a density greater than that of water are separated through the screen of the spiral tube 14 and continuously discharged outward along the spiral tube 14 to the sediment chamber 16, and then discharged from the sewage outlet 15 at the bottom of the tank body 11. In the process of water flowing upward, it is subjected to the ultrasonic action of the ultrasonic generator to generate cavitation bubbles. When the ultrasonic wave acts in the liquid phase, the gas components in the solution can enter the cavitation bubbles through the gas-liquid interface "directional diffusion". The cavitation bubbles enter the growth stage. When the cavitation bubbles rise to the surface of the solution and collapse, the gas will escape from the bubbles to achieve the purpose of degassing. The water flows upward and flows out from the water outlet 13. After being sterilized by the ultraviolet sterilization unit 4, it is discharged to the recharging point. The high-frequency electric field generating unit 2 generates a high-energy central electrostatic field through the high-frequency electric field positive electrode 21 and the high-frequency electric field negative electrode 22, causing the water molecules to resonate, turning the hydrogen-bonded water molecule clusters into single polarities, and changing the activation of the water. These extremely small water molecules can penetrate, surround, dissolve, and remove old scale in the system.

[0113] Example 2

[0114] like Figure 3 and 4 As shown, compared with Example 1, most of them are the same, except that the treatment system also includes a water quality monitoring unit 5 located at the water inlet 12 and the water outlet 13 respectively, and a gas detection unit 6 located at the top of the tank body 11.

[0115] In this embodiment, the water quality monitoring unit 5 is used to monitor the turbidity, TDS, and dissolved oxygen concentration values ​​of the inlet and outlet water of the geothermal multi-effect treatment system. The water quality monitoring unit 5 includes a first dissolved oxygen detector 51, a first TDS detector 52, and a first turbidity detector 53 located at the water inlet 12, and a second dissolved oxygen detector 54, a second TDS detector 55, and a second turbidity detector 56 located at the water outlet 13, which are used to monitor the inlet and outlet water quality;

[0116] The gas detection unit 6 is used to monitor the concentration values ​​of H2S, CO2, and CH4 gases discharged from the geothermal multi-effect treatment system. The gas detection unit 6 includes an H2S gas detector, a CO2 gas detector, and a CH4 gas detector.

[0117] The working process of the processing system of this embodiment is as follows:

[0118] Sewage enters the tank body 11 from the water inlet 12. Under the action of the rotation of the spiral tube 14, the water flows upward. Impurity particles with a density greater than that of water are separated through the screen of the spiral tube 14 and continuously discharged outward along the spiral tube 14 to the sediment chamber 16, and discharged from the sewage outlet 15 at the bottom of the tank body 11. In the process of water flowing upward, it is subjected to the ultrasonic action of the ultrasonic generator to generate cavitation bubbles. When the ultrasonic wave acts in the liquid phase, the gas components in the solution can enter the cavitation bubbles through the gas-liquid interface "directional diffusion". The cavitation bubbles enter the growth stage. When the cavitation bubbles rise to the surface of the solution and collapse, the gas will escape from the bubbles to achieve the purpose of degassing. The water flows upward and flows out from the water outlet 13, is sterilized by the ultraviolet sterilization unit 4, and is discharged to the recharging point after the turbidity, TDS and dissolved oxygen concentration of the inlet and outlet water are detected by the water quality monitoring unit 5. The gas detection unit 6 at the top of the tank body 11 monitors the gas. The high-frequency electric field generating unit 2 generates a high-energy middle electrostatic field through the high-frequency electric field positive electrode 21 and the high-frequency electric field negative electrode 22, causing the water molecules to resonate, turning the hydrogen-bonded water molecules into single polarity, changing the activation of the water. These extremely small water molecules can penetrate, surround, dissolve, and remove old scale in the system. The ultrasonic frequency of the ultrasonic generator and the middle electrostatic field strength generated by the high-frequency electric field generating unit 2 are adjusted by the turbidity, TDS, and dissolved oxygen concentration of the inlet and outlet water detected by the water quality monitoring unit 5. When the turbidity, TDS, and dissolved oxygen concentration of the inlet and outlet water are detected to reach or exceed the set value, the voltage of the high-frequency electric field generating unit 2 and the frequency of the ultrasonic degassing unit 3 are increased.

[0119] Example 3

[0120] like Figures 5 to 11 As shown, compared with Example 2, most of them are the same, except that the treatment system also includes a control unit 7 connected to the sand removal and filtration unit 1, the high-frequency electric field generating unit 2, the ultrasonic degassing unit 3, the medium-pressure ultraviolet sterilization unit 4, the water quality monitoring unit 5, and the gas detection unit 6.

[0121] In this embodiment, the control unit 7 is a PLC control. When used in conjunction with the water quality monitoring unit 5, it can control the operation status of other units in a chain manner, and can automatically adjust the intensity of the high-frequency electric field generated by the high-frequency electric field generating unit 2 and the ultrasonic frequency of the ultrasonic degassing unit 3 according to the turbidity, TDS, and dissolved oxygen concentration of the inlet and outlet water detected by the water quality monitoring unit 5, so as to achieve the purpose of dynamic and automatic operation of the geothermal multi-effect treatment system.

[0122] In this embodiment, the control process of the treatment system is as follows: the water quality monitoring unit 5 detects the turbidity, TDS, and dissolved oxygen concentration of the inlet and outlet water, and transmits a signal to the control unit 7. When it is detected that the turbidity, TDS, and dissolved oxygen concentration of the inlet and outlet water reach or exceed the set value, the control unit 7 controls the high-frequency electric field generating unit 2 to increase the voltage and the ultrasonic degassing unit 3 to increase the frequency.

[0123] In this embodiment, the control unit 7 is an integrated control, which uses a Siemens automatic programmable controller as the main control device, model 6ES7 288-1SR20-0AA0. The control unit 7 also includes a touch screen 71, which serves as a human-machine information exchange tool and realizes full automatic operation of the equipment through the operating data of the monitoring system.

[0124] In this embodiment, a cabinet 8 is disposed outside the tank 11 , and the touch screen 71 is installed on the cabinet 8 .

[0125] The working process of the processing system of this embodiment is as follows:

[0126] Sewage enters the tank body 11 from the water inlet 12. Under the action of the rotation of the spiral tube 14, the water flows upward. Impurity particles with a density greater than that of water are separated through the screen of the spiral tube 14 and continuously discharged outward along the spiral tube 14 to the sediment chamber 16, and discharged from the sewage outlet 15 at the bottom of the tank body 11. In the process of water flowing upward, it is subjected to the ultrasonic action of the ultrasonic generator to generate cavitation bubbles. When the ultrasonic wave acts in the liquid phase, the gas components in the solution can enter the cavitation bubbles through the gas-liquid interface "directional diffusion". The cavitation bubbles enter the growth stage. When the cavitation bubbles rise to the surface of the solution and collapse, the gas will escape from the bubbles to achieve the purpose of degassing. The water flows upward and flows out from the water outlet 13, is sterilized by the ultraviolet sterilization unit 4, and is discharged to the recharging point after the turbidity, TDS and dissolved oxygen concentration of the inlet and outlet water are detected by the water quality monitoring unit 5. The gas detection unit 6 at the top of the tank body 11 monitors the gas. The high-frequency electric field generating unit 2 generates a high-energy central electrostatic field through the high-frequency electric field positive electrode 21 and the high-frequency electric field negative electrode 22, causing water molecules to resonate, turning hydrogen-bonded water molecules into single polarity, changing the activation of water, and these extremely small water molecules can penetrate, surround, dissolve, and remove old scale in the system. The turbidity, TDS, and dissolved oxygen concentration of the inlet and outlet water detected by the water quality monitoring unit 5 are used to adjust the ultrasonic frequency of the ultrasonic generator and the central electrostatic field strength generated by the high-frequency electric field generating unit 2 using the control unit 7, so as to achieve the purpose of dynamic and automatic operation of the geothermal multi-effect treatment system.

[0127] In this embodiment, the control process of the processing system is:

[0128] The water quality monitoring unit 5 detects the turbidity, TDS, and dissolved oxygen concentration of the inlet and outlet water, and transmits a signal to the control unit 7. When it is detected that the turbidity, TDS, and dissolved oxygen concentration of the inlet and outlet water reach or exceed the set value, the control unit 7 controls the high-frequency electric field generating unit 2 to increase the voltage and the ultrasonic degassing unit 3 to increase the frequency.

[0129] Although the present invention has been described in detail above by means of general description, specific implementation methods and tests, it is obvious to those skilled in the art that some modifications or improvements may be made to the present invention. Therefore, these modifications or improvements made without departing from the spirit of the present invention all fall within the scope of protection claimed by the present invention.

Claims

1. A geothermal recharge water multi-effect treatment system, characterized in that: The processing system includes: A sand removal filter unit (1) for discharging foreign particles in geothermal water, comprising a tank body (11), a water inlet (12) and a water outlet (13) located on both sides of the tank body (11), a spiral tube (14) located inside the tank body (11) and rotatable to separate foreign particles from water, and a sewage outlet (15) located at the bottom of the tank body (11) and used to discharge foreign particles; A high-frequency electric field generating unit (2) located on the inner wall of the tank body (11) and used to remove old scale in geothermal water and inhibit the generation of new scale, wherein the central electrostatic field formed by the unit is parallel to the direction of the water inlet (12); An ultrasonic degassing unit (3) located on the inner wall of the tank (11) and used for removing dissolved oxygen from the geothermal water; And an ultraviolet sterilization unit (4) located in the water outlet (13).

2. A geothermal recharge water multi-effect treatment system according to claim 1, characterized in that: The height of the water outlet (13) is higher than the height of the water inlet (12); The height of the ultrasonic degassing unit (3) is located between the water inlet (12) and the water outlet (13); The high-frequency electric field generating unit (2) is located below the water inlet (12).

3. A geothermal recharge water multi-effect treatment system according to claim 1, characterized in that: A sediment chamber (16) is provided at the bottom of the spiral tube (14), and the sediment chamber (16) is connected to the sewage outlet (15).

4. A geothermal recharge water multi-effect treatment system according to claim 1, characterized in that: The high-frequency electric field generating unit (2) comprises a generator and a high-frequency electric field generating electrode installed on the side wall of the tank body (11); the high-frequency electric field generating electrode comprises a high-frequency electric field positive electrode (21) and a high-frequency electric field negative electrode (22) which are arranged opposite to each other on one side of the inner wall of the tank body (11) to form an electrostatic field; the high-frequency electric field positive electrode (21) is connected to the positive lead-out terminal of the generator, and the high-frequency electric field negative electrode (22) is connected to the negative lead-out terminal of the generator.

5. A geothermal recharge water multi-effect treatment system according to claim 1, characterized in that: The ultrasonic degassing unit (3) is an ultrasonic generator.

6. A geothermal reinjection water multi-effect treatment system according to claim 1, characterized in that: The ultraviolet sterilization unit (4) is a medium-pressure ultraviolet sterilizer.

7. A geothermal reinjection water multi-effect treatment system according to claim 1, characterized in that: The treatment system further comprises a water quality monitoring unit (5) located at the water inlet (12) and the water outlet (13) respectively, and a gas detection unit (6) located at the top of the tank body (11).

8. A geothermal recharge water multi-effect treatment system according to claim 7, characterized in that: The water quality monitoring unit (5) comprises a first dissolved oxygen detector (51), a first TDS detector (52), and a first turbidity detector (53) located at the water inlet (12), and a second dissolved oxygen detector (54), a second TDS detector (55), and a second turbidity detector (56) located at the water outlet (13); The gas detection unit (6) comprises an H2S gas detector, a CO2 gas detector and a CH4 gas detector.

9. A geothermal recharge water multi-effect treatment system according to claim 1 or 7, characterized in that: The treatment system further comprises a control unit (7) connected to the sand removal and filtration unit (1), the high-frequency electric field generating unit (2), the ultrasonic degassing unit (3), the medium-pressure ultraviolet sterilization unit (4), the water quality monitoring unit (5), and the gas detection unit (6).

10. A geothermal recharge water multi-effect treatment system according to claim 9, characterized in that: The control unit (7) is PLC controlled.

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