A circulating water polarization flocculation descaling system

Abstract

The invention relates to the technical field of circulating water treatment, in particular to a circulating water electrode polarization flocculation and descaling system, comprising a circulating water tank, a heat exchanger, a cooling tower, an electrolytic cell, an inclined tube sedimentation tank, a carbon dioxide gas supply device and an acid washing device, wherein a plurality of alternately distributed cathode plates and anode plates are arranged in the electrolytic cell, a membrane assembly is arranged between the cathode plate and the anode plate, and a flocculation electrode plate is arranged between the membrane assembly and the cathode plate; the invention adds a flocculation electrode plate in the electrolytic cell, utilizes the metal hydroxide generated by the soluble metal anode in the electrolysis process to flocculate tiny scale particles generated in the main process, reduces the scale crystallization time and the scale precipitation time, and at the same time, the setting of the flocculation electrode plate increases the concentration of hydroxide and improves the precipitation of calcium hydroxide; the invention introduces carbon dioxide into the electrolytic cell, improves the descaling ability, and reduces the scale on the electrode plate and the membrane assembly under the condition of aeration and flushing, thereby extending the operation interval of the auxiliary process.

Description

Technical Field

[0001] The invention relates to the technical field of circulating water treatment, in particular to a circulating water electrode polarization flocculation and descaling system. Background Art

[0002] Circulating water treatment refers to system equipment that cools and treats circulating water. Its main purpose is to maintain stable water quality, prevent equipment blockage, corrosion and microbial growth, and ensure the normal operation of the circulating water system. Circulating water treatment includes cooling treatment and water quality stabilization treatment. Water quality stabilization treatment is generally achieved by adding specially formulated water treatment agents, such as phosphorus-containing compound silicate film water treatment agents, to prevent water quality deterioration.

[0003] In addition, there is also a method of treating water by electrolysis. The Chinese invention patent with the publication number CN118388057B discloses an electrochemical water treatment system based on a circulating water bypass system. The system optimizes the reaction environment between the anode and the cathode and quickly removes the precipitate in the circulating water by setting a semipermeable membrane inside the electrolysis reaction chamber and between the anode plate and the cathode plate.

[0004] However, the above invention still has the following disadvantages: First, the amount of scale precipitation depends on the concentration of hydroxide and carbonate in the water body. However, the concentration of hydroxide generated by electrolyzed water and the concentration of carbonate ions contained in the circulating water are limited, and the efficiency of scale precipitation needs to be improved; Second, scale will accumulate on the cathode plate and the semipermeable membrane. When the scale is too thick, it will lead to reduced electrochemical reaction efficiency and increased energy consumption. The scale layer on the cathode plate and the semipermeable membrane needs to be regularly removed. At present, the interval time for scale layer removal is short and the removal is not thorough. During the entire treatment process, the number of pauses for scale precipitation in electrolyzed water needs to be reduced. Summary of the invention

[0005] The present invention provides a circulating water electrode polarization flocculation descaling system, comprising a circulating water pool, a heat exchanger, a cooling tower, an electrolytic cell and an inclined tube sedimentation tank, wherein the water outlet end of the circulating water pool is connected with the heat exchanger through an outlet pipe, the water inlet end of the circulating water pool is connected with the cooling tower through an inlet pipe, one outlet water of the heat exchanger is connected with the cooling tower through a reflux pipe 1, the other outlet water of the heat exchanger is connected with the electrolytic cell, one outlet water of the electrolytic cell leads to the inclined tube sedimentation tank, the other outlet water of the electrolytic cell is returned to the circulating water pool through a reflux pipe 2 after merging with the outlet water of the inclined tube sedimentation tank.

[0006] The electrolytic cell is provided with a plurality of alternately distributed cathode plates and anode plates, which are electrically connected to a DC power supply through a wire, a membrane assembly is provided between the cathode plate and the anode plate, a flocculation plate is provided between the membrane assembly and the cathode plate, the anode of the flocculation plate is made of aluminum or iron, and the cathode is made of stainless steel or titanium, the electrolytic cell is connected to a fan through an exhaust pipe, and in the process of electrolyzing circulating water, the fan extracts chlorine, hydrogen and oxygen generated in the electrolytic cell, and the circulating water pool, heat exchanger, cooling tower, electrolytic cell, inclined tube sedimentation tank and fan form the main process of circulating water electrolysis treatment.

[0007] In one possible implementation, the circulating water polarization flocculation and descaling system also includes a carbon dioxide gas supply device, one outlet of the carbon dioxide gas supply device is discharged into the electrolytic cell, and the other outlet of the carbon dioxide gas supply device is discharged into the front end of the inclined tube sedimentation tank.

[0008] In one possible implementation, the circulating water electrode polarization flocculation and descaling system also includes a pickling device, and the two water outlets of the electrolytic cell are connected to the pickling device through connecting pipe 2. The pickling device passes the pickling liquid into the electrolytic cell through connecting pipe 1. The electrolytic cell and the pickling device form an auxiliary process for the electrolytic treatment of the circulating water body, and the auxiliary process is used to pickle the scale, and the auxiliary process is performed alternately with the main process.

[0009] In one possible implementation, a plurality of liquid spraying assemblies are provided at the upper end of the interior of the electrolytic cell, and the liquid spraying assemblies include a driving part and a liquid spraying part. The driving part includes a track, an electric slider and a rotating shaft. The track is provided at the upper end of the interior of the electrolytic cell for sliding up and down, and an electric slider is slidably installed at the bottom of the track, and the bottom of the electric slider is rotatably connected to the rotating shaft.

[0010] In one possible implementation, the liquid spraying part includes a rotating water tank fixedly connected to the bottom of the rotating shaft and a No. 1 flushing pipe and a No. 2 flushing pipe installed at the bottom of the rotating water tank. The connecting pipe 1 is connected to the rotating water tanks in each liquid spraying assembly through a plurality of branch pipes.

[0011] In one possible implementation, the No. 1 flushing pipe in the liquid spraying part at both ends of the electrolytic cell is fixed at the edge of the lower surface of the rotating water tank, and the No. 2 flushing pipe in the liquid spraying part at both ends of the electrolytic cell is fixed at the middle of the lower surface of the rotating water tank.

[0012] In one possible implementation, the No. 1 flushing pipe in the liquid spraying section in the middle of the electrolytic cell is fixed at the edge of the rotating water tank, and the liquid spraying section in the middle of the electrolytic cell includes two No. 2 flushing pipes, one of which is fixed at a position near the edge of the lower surface of the rotating water tank, and the distance from the lower end of the No. 1 flushing pipe to the axis of the rotating water tank is greater than the distance from the lower end of the No. 2 flushing pipe to the axis of the rotating water tank, and the other No. 2 flushing pipe is fixed at a position near the middle of the lower surface of the rotating water tank.

[0013] In one possible implementation, the No. 2 flushing pipe includes a straight pipe fixed at the bottom of the rotating water tank, a three-way joint fixed at the bottom of the straight pipe, and a flushing pipe connected to both ends of the three-way joint. The lower ends of all the No. 1 flushing pipes and the two flushing pipes in the No. 2 flushing pipe are covered with rubber soft sleeves.

[0014] In a possible implementation, an ultrasonic generator is disposed at the bottom of the electrolytic cell, and an ultrasonic transducer is disposed inside the electrolytic cell. The ultrasonic transducer receives the electrical signal generated by the ultrasonic generator and converts the electrical signal into mechanical vibration.

[0015] In one possible implementation, when the auxiliary process is running, the positive and negative poles of the DC power supply output of the electrolytic cell are switched.

[0016] The above one or more technical solutions in the embodiments of the present invention have at least one of the following technical effects: 1. The present invention adds flocculation plates in the electrolytic cell and utilizes the metal hydroxides produced by the soluble metal anode during the electrolysis process to flocculate the tiny scale particles produced in the main process, thereby reducing the scale crystallization time and scale precipitation time. At the same time, the setting of the flocculation plates increases the concentration of hydroxide and improves the precipitation of calcium hydroxide.

[0017] 2. The present invention introduces carbon dioxide into the electrolytic cell to improve the scaling ability while reducing the accumulation of scale on the plates and membrane components under aeration and flushing conditions, thereby extending the operating interval of the auxiliary process. Carbon dioxide is simultaneously introduced into the front end of the inclined tube sedimentation tank to further improve the scale precipitation, making it easier to precipitate in the rear end inclined tube part.

[0018] 3. The present invention uses a pickling device in conjunction with a liquid spraying assembly to wash the scale layer on the anode plate, cathode plate and membrane assembly, thereby improving the reaction efficiency of the anode plate, cathode plate and membrane assembly in the main process; and when the auxiliary process is running, the positive and negative poles of the power output of the electrolytic cell are interchanged, and an oxidation reaction occurs on the anode after the polarity is interchanged. The acidic substances and bubbles generated on the surface of the anode plate help to remove the scale on the surface of the plate.

[0019] 4. The present invention sets an ultrasonic generator and an ultrasonic transducer in the electrolytic cell to generate vibration in the circulating water body, thereby improving the activity of the fluid and preventing the formation of scale. On the one hand, the operation interval of the auxiliary process can be further extended, and on the other hand, the scale layer can be loosened by shearing action when the auxiliary process is running, thereby accelerating the shedding of the scale layer. The ultrasonic technology, the introduction of carbon dioxide and the addition of flocculation plates can act simultaneously, and the effects are superimposed on each other, thereby greatly improving the efficiency of scale precipitation and greatly reducing the frequency of auxiliary process operation.

[0020] 5. The present invention uses electrolysis technology to adjust the balance of minerals in water, so as to achieve the purpose of removing scaling substances (calcium and magnesium ions) and anti-corrosion, and the anode water flowing back to the circulating water pool can adjust the pH value to achieve the purpose of anti-corrosion, sterilization and algae removal; in addition, the circulating water treatment method provided by the present invention can be combined with the existing drug-adding treatment method. Compared with the existing drug-adding water treatment method, on the one hand, it reduces the amount of drugs used, and on the other hand, it increases the concentration multiple of circulating water, reduces water replenishment and sewage discharge, and achieves the purpose of energy saving, emission reduction and consumption reduction. In the long run, the overall cost is lower than that of only treating water quality by adding drugs. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of a circulating water electrode polarization flocculation and descaling system provided in an embodiment of the present invention.

[0022] Figure 2 It is a schematic diagram of electrode distribution inside the electrolytic cell provided by an embodiment of the present invention.

[0023] Figure 3 It is a schematic diagram of the electrodes and liquid spraying components inside the electrolytic cell provided in an embodiment of the present invention.

[0024] Figure 4 yes Figure 3 A magnified schematic diagram of area A in the middle.

[0025] Figure 5 yes Figure 3 A magnified schematic diagram of area B.

[0026] In the figure: 1. circulating water pool; 2. heat exchanger; 3. cooling tower; 4. electrolytic cell; 41. anode plate; 42. cathode plate; 43. membrane assembly; 44. flocculation plate; 5. pickling device; 6. inclined tube sedimentation tank; 7. fan; 8. carbon dioxide gas supply device; 91. track; 92. electric slider; 93. rotating shaft; 94. rotating water tank; 95. No. 1 flushing pipe; 96. No. 2 flushing pipe. DETAILED DESCRIPTION

[0027] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described below, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0028] See also Figure 1 A circulating water electrode polarization flocculation and descaling system comprises a circulating water pool 1, a heat exchanger 2, a cooling tower 3, an electrolytic cell 4 and an inclined tube sedimentation tank 6, wherein the outlet end of the circulating water pool 1 is connected to the heat exchanger 2 through an outlet pipe, the inlet end of the circulating water pool 1 is connected to the cooling tower 3 through an inlet pipe, and the heat exchanger 2 is connected to the cooling tower 3 through a reflux pipe 1; specifically, the water in the circulating water pool 1 is pumped into the heat exchanger 2 for heat exchange treatment, and one of the outlet water of the heat exchanger 2 is passed into the cooling tower 3 through a reflux pipe 1 for cooling, and then returns to the circulating water pool 1 through the inlet pipe.

[0029] See also Figure 1 The other outlet water of the heat exchanger 2 is connected to the electrolytic cell 4, one of the outlet water of the electrolytic cell 4 leads to the inclined tube sedimentation tank 6, and the other outlet water of the electrolytic cell 4 merges with the outlet water of the inclined tube sedimentation tank 6 and returns to the circulating water tank 1 through the reflux pipe 2.

[0030] See also Figure 1 and Figure 2 The electrolytic cell 4 is provided with a plurality of alternately distributed cathode plates 42 and anode plates 41, the cathode plates 42 and the anode plates 41 are electrically connected to a DC power supply through a wire, a membrane assembly 43 is provided between the cathode plates 42 and the anode plates 41, and a DC voltage is applied between the anode plates 41 and the cathode plates 42, so that anions and cations in the circulating water body migrate to the anode plates 41 and the cathode plates 42 respectively, and an electrochemical reaction occurs on the anode plates 41 and the cathode plates 42, and the anions and cations in the water are irreversibly operated through the membrane assembly 43.

[0031] The cathode plate 42 undergoes a hydrogen evolution reaction, which mainly involves the precipitation of hydrogen ions in bicarbonate and hydrogen ions in water, so that water-soluble calcium bicarbonate and the like are converted into crystals such as calcium carbonate and precipitated. In addition, since the cathode plate 42 is generally alkaline, the electrolysis reaction in the alkaline solution generates hydrogen and hydroxide ions, and the permanent hard calcium ions in the circulating water body combine with the hydroxide ions to generate calcium hydroxide and precipitate. The electrolysis technology is used to adjust the balance of minerals in the water, thereby achieving the purpose of removing scaling substances such as calcium ions and magnesium ions and preventing corrosion, which can greatly increase the concentration rate and reduce drainage.

[0032] It should be noted that the calcium carbonate and calcium hydroxide precipitated near the cathode plate 42 will adhere to the cathode plate 42, the membrane assembly 43 and the flocculation plate 44, and the calcium carbonate and calcium hydroxide will form scaling water with the cathode water. The scaling water will be passed into the inclined tube sedimentation tank 6, and the scale will gradually precipitate and be discharged through the sewage pipe at the bottom of the inclined tube sedimentation tank 6.

[0033] During the process of electrolysis of water, chloride ions are precipitated on the anode plate 41, that is, the electric current converts a part of the chloride ions into free chlorine, and at the same time produces oxygen, chlorine, trace ozone, oxygen free radicals, hydroxyl free radicals and hydrogen peroxide. This series of products has a killing effect; in addition, the anode water merges with the effluent from the inclined tube sedimentation tank 6 and then flows back into the circulating water tank 1, which can not only adjust the pH value of the circulating water body, but also can perform antiseptic, sterilization and algaecide treatment on the circulating water body.

[0034] See also Figure 1 The electrolytic cell 4 is connected to the fan 7 through an exhaust pipe. During the electrolysis of circulating water, the fan 7 keeps running to extract and discharge the trace chlorine, hydrogen and oxygen generated in the electrolytic cell 4.

[0035] Continue reading Figure 1 A flocculation plate 44 is arranged between the membrane assembly 43 and the cathode plate 42. The anode of the flocculation plate 44 is aluminum or iron, and the cathode is stainless steel or titanium. During the electrolysis process, the electrolysis of water will first increase the amount of hydroxide, thereby increasing the probability of calcium and magnesium ions combining with hydroxide ions in the circulating water body and increasing the scale removal rate. The divalent iron ions generated by the iron anode during the electrolysis process will react with the hydroxide ions to generate iron hydroxide, which can flocculate the generated tiny scale particles and reduce the crystallization time and precipitation time of the scale. In addition, the bubbles (hydrogen) generated during the electrolysis process can adhere to the flocculants, further improving the flocculation effect.

[0036] See also Figure 1 and Figure 2 In order to increase the precipitation amount of calcium carbonate and calcium hydroxide in the electrolytic cell 4, this embodiment adopts a method of increasing carbonate ions and hydroxide ions. Specifically, the circulating water electrode polarization flocculation descaling system also includes a carbon dioxide gas supply device 8, one of the outlets of the carbon dioxide gas supply device 8 is discharged into the electrolytic cell 4, and the other outlet of the carbon dioxide gas supply device 8 is discharged into the front end of the inclined tube sedimentation tank 6. Carbon dioxide is introduced into the front end of the electrolytic cell 4 and the inclined tube sedimentation tank 6, thereby increasing the concentration of carbonate ions. The reaction equation of carbon dioxide in water with water is as follows: CO2+H2O←→H2CO3, CO2+H2O←→H + +HCO3 - 、HCO3 - +H2O←→H + +CO3 2-Carbonate ions combine with calcium ions to form scale, which, on the one hand, improves the scaling ability of the electrolytic cell 4, allowing more scale to be discharged into the inclined tube sedimentation tank 6 with the cathode water. On the other hand, the calcium ions that have not yet been precipitated will react with the carbonate ions at the front end of the inclined tube sedimentation tank 6, further improving the precipitation of scale, making it easier for scale to precipitate in the inclined tube part of the inclined tube sedimentation tank 6. In addition, introducing carbon dioxide into the electrolytic cell 4 can also increase the aeration amount in the electrolytic cell 4, so that the scale is in a suspended state as much as possible under aeration and flushing conditions, reducing the accumulation of scale on the cathode plate 42, the membrane assembly 43 and the flocculation plate 44, and correspondingly extending the service life of the cathode plate 42, the membrane assembly 43 and the flocculation plate 44.

[0037] See also Figure 1 The circulating water pool 1, heat exchanger 2, cooling tower 3, electrolytic cell 4, inclined tube sedimentation tank 6, fan 7 and carbon dioxide supply device 8 form the main process of circulating water electrolysis treatment. After the main process runs for a period of time, a layer of scale will be formed on the cathode plate 42, membrane assembly 43 and flocculation plate 44. In order to improve the electrolytic descaling efficiency in the electrolytic cell 4, it is necessary to clean the scale regularly; the circulating water electrode polarization flocculation descaling system also includes a pickling device 5, which is connected to the electrolytic cell 4 through a connecting pipe. The electrolytic cell 4 is connected to the pickling device 5. Specifically, the two outlet waters of the electrolytic cell 4 are connected to the pickling device 5 through the connecting pipe 2. The pickling device 5 passes the pickling liquid into the electrolytic cell 4 through the connecting pipe 1. The electrolytic cell 4 and the pickling device 5 form an auxiliary process for electrolytic treatment of the circulating water body. The auxiliary process is used for pickling scale. Before pickling, the main process needs to be stopped, that is, the heat exchanger 2 no longer passes water into the electrolytic cell 4. Similarly, the electrolytic cell 4 no longer discharges scaling water and anode water to the inclined tube sedimentation tank 6 and the circulating water tank 1.

[0038] See also Figure 3 , Figure 4 and Figure 5 , a plurality of liquid spraying components are arranged at the upper end of the interior of the electrolytic cell 4, and the liquid spraying components include a driving part and a liquid spraying part. The driving part includes a track 91, an electric slider 92 and a rotating shaft 93. The track 91 is arranged at the upper end of the interior of the electrolytic cell 4 for sliding up and down. The electric slider 92 is slidably installed at the bottom of the track 91, and the bottom of the electric slider 92 is rotatably connected to the rotating shaft 93; the liquid spraying part includes a rotating water tank 94 fixedly connected to the bottom of the rotating shaft 93 and a No. 1 flushing pipe 95 and a No. 2 flushing pipe 96 installed at the bottom of the rotating water tank 94. The connecting pipe 1 is connected to the rotating water tank 94 in each liquid spraying component through a plurality of branch pipes (the branch pipes are not shown in the figure). The connecting pipe 1 is used to pass the pickling liquid in the pickling device 5 into the rotating water tank 94. The No. 1 flushing pipe 95 in the liquid spraying part at both ends of the electrolytic cell 4 is fixed at the edge of the lower surface of the rotating water tank 94, and the No. 2 flushing pipe 96 in the liquid spraying part at both ends of the electrolytic cell 4 is fixed at the middle of the lower surface of the rotating water tank 94.

[0039] See also Figure 3 and Figure 4 , taking the liquid spraying part at the left end of the electrolytic cell 4 as an example, the No. 2 flushing pipe 96 includes a straight pipe fixed at the bottom of the rotating water tank 94, a three-way joint fixed at the bottom of the straight pipe and flushing pipes connected to both ends of the three-way joint, one of the flushing pipes points to the left side of the membrane assembly 43, and the other flushing pipe points to the right side of the flocculation plate 44. The No. 1 flushing pipe 95 is used to flush the left side of the cathode plate 42.

[0040] See also Figure 5 The No. 1 flushing pipe 95 in the liquid spraying part in the middle of the electrolytic cell 4 is fixed on the edge of the rotating water tank 94. The liquid spraying part in the middle of the electrolytic cell 4 includes two No. 2 flushing pipes 96, one of which is fixed on the lower surface of the rotating water tank 94 near the edge, and the distance from the lower end of the No. 1 flushing pipe 95 to the axis of the rotating water tank 94 is greater than the distance from the lower end of the No. 2 flushing pipe 96 to the axis of the rotating water tank 94. The other No. 2 flushing pipe 96 is fixed on the lower surface of the rotating water tank 94 near the middle. The two flushing pipes of the No. 2 flushing pipe 96 located on the lower surface of the rotating water tank 94 near the middle flush the right side of the flocculation plate 44 and the left side of the cathode plate 42 respectively. The two flushing pipes of the No. 2 flushing pipe 96 located on the lower surface of the rotating water tank 94 near the edge flush the left side of the membrane assembly 43 and the right side of the adjacent flocculation plate 44 respectively. The No. 1 flushing pipe 95 flushes the right side of the membrane assembly 43.

[0041] The lower ends of all the No. 1 flushing pipes 95 and the two flushing pipes No. 2 96 are covered with rubber soft sleeves to prevent the lower ends of the No. 1 flushing pipes 95 and the No. 2 flushing pipes 96 from colliding with the cathode plate 42, membrane assembly 43, and flocculation plate 44 at the corresponding positions when the rotating shaft 93 rotates.

[0042] It should be noted that the rotational power source of the rotating shaft 93 can be a motor, or it can be achieved by a gear rack transmission. Several rotating shafts 93 can use the same drive or different drives; in addition, all the spray components can be driven up or down by an external lifting mechanism such as an electric telescopic rod or a hydraulic cylinder.

[0043] When the electric slider 92 drives the rotating shaft 93 and the rotating water tank 94 to move forward and backward, the pickling liquid sprayed from the No. 1 flushing pipe 95 and the No. 2 flushing pipe 96 flushes the scale. When the electric slider 92 moves to the end of the track 91, the rotating shaft 93 drives the rotating water tank 94 to rotate 180 degrees. At this time, all the No. 1 flushing pipes 95 and No. 2 flushing pipes 96 rotate 180 degrees with the corresponding rotating water tank 94 to change the flushing surface. In this way, all the cathode plates 42, membrane assemblies 43 and both sides of the flocculation plates 44 are pickled. The pickling liquid reacts with the scale to dissolve the scale. When the main process is restarted, the circulating water entering the electrolytic cell 4 will be re-electrolyzed to form hydroxide ions, and re-react with the dissolved calcium ions to form scale. The scale-dissolving water will be discharged into the inclined tube sedimentation tank 6 for precipitation. In addition, when the auxiliary process is running, the positive and negative poles of the DC power supply output of the electrolytic cell 4 are switched. The acidic substances and bubbles generated by the oxidation reaction of the anode after the polarity is interchanged help to remove the scale.

[0044] See also Figure 1 An ultrasonic generator is arranged at the bottom of the electrolytic cell 4, and an ultrasonic transducer is arranged inside the electrolytic cell 4, wherein the ultrasonic transducer receives the electrical signal generated by the ultrasonic generator and converts the electrical signal into mechanical vibration, thereby generating ultrasonic waves. These mechanical vibrations produce a "cavitation" effect in the circulating water in the electrolytic cell 4, forming bubbles that burst in an instant, generating powerful shock waves and high temperature and high pressure, thereby destroying the scale layer. In addition, ultrasonic waves can also improve the activity of the circulating water body, prevent the formation of scale, and loosen the scale layer through shearing action.

[0045] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0046] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "connect", "install", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, an integral connection, or a sliding connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection 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.

[0047] The embodiments of this specific implementation method are all preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Therefore, all equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A circulating water polarization flocculation descaling system, comprising a circulating water pool (1), a heat exchanger (2), a cooling tower (3), an electrolytic cell (4) and an inclined tube sedimentation tank (6), characterized in that: The water outlet of the circulating water pool (1) is connected to the heat exchanger (2) through a water outlet pipe, the water inlet of the circulating water pool (1) is connected to the cooling tower (3) through a water inlet pipe, one of the water outlets of the heat exchanger (2) is connected to the cooling tower (3) through a return pipe 1, the other water outlet of the heat exchanger (2) is connected to the electrolytic cell (4), one of the water outlets of the electrolytic cell (4) is led to the inclined tube sedimentation tank (6), and the other water outlet of the electrolytic cell (4) is combined with the water outlet of the inclined tube sedimentation tank (6) and then returned to the circulating water pool (1) through a return pipe 2; The electrolytic cell (4) is provided with a plurality of cathode plates (42) and anode plates (41) which are alternately distributed. The cathode plates (42) and the anode plates (41) are electrically connected to a DC power supply via a wire. A membrane assembly (43) is provided between the cathode plates (42) and the anode plates (41). A flocculation plate (44) is provided between the membrane assembly (43) and the cathode plates (42). The anode of the flocculation plate (44) is made of aluminum or iron, and the cathode is made of stainless steel or titanium. The electrolytic cell (4) is connected to a fan (7) via an exhaust pipe. During the electrolysis of circulating water, the fan (7) extracts chlorine, hydrogen and oxygen generated in the electrolytic cell (4). The circulating water pool (1), the heat exchanger (2), the cooling tower (3), the electrolytic cell (4), the inclined tube sedimentation tank (6) and the fan (7) form a main process of electrolytic treatment of circulating water. The circulating water electrode polarization flocculation descaling system further comprises a carbon dioxide gas supply device (8), one outlet of the carbon dioxide gas supply device (8) is discharged into the electrolytic cell (4), and another outlet of the carbon dioxide gas supply device (8) is discharged into the front end of the inclined tube sedimentation tank (6), and the carbon dioxide gas supply device (8) also belongs to the main process; The circulating water electrode polarization flocculation descaling system further comprises a pickling device (5), wherein the electrolytic cell (4) and the pickling device (5) form an auxiliary process for electrolytic treatment of the circulating water body, the auxiliary process is used for pickling scale, and the auxiliary process is performed alternately with the main process; when the auxiliary process is running, the positive and negative poles of the DC power supply output of the electrolytic cell (4) are switched; A plurality of liquid spraying assemblies are arranged at the upper end of the inner part of the electrolytic cell (4), and the scale layers on the anode plate (41), the cathode plate (42) and the membrane assembly (43) are washed by the acid cleaning device (5) in cooperation with the liquid spraying assemblies; An ultrasonic generator is arranged at the bottom of the electrolytic tank (4), and an ultrasonic transducer is arranged inside the electrolytic tank (4).

2. A circulating water polarization flocculation descaling system according to claim 1, characterized in that: The two outlet waters of the electrolytic cell (4) are both connected to the pickling device (5) via the second connecting pipe, and the pickling device (5) passes the pickling liquid into the electrolytic cell (4) via the first connecting pipe.

3. A circulating water polarization flocculation descaling system according to claim 2, characterized in that: The liquid spraying assembly comprises a driving part and a liquid spraying part. The driving part comprises a track (91), an electric slider (92) and a rotating shaft (93). The track (91) is slidably arranged at the upper end of the electrolytic cell (4) up and down. The electric slider (92) is slidably installed at the bottom of the track (91). The bottom of the electric slider (92) is rotatably connected to the rotating shaft (93).

4. A circulating water polarization flocculation descaling system according to claim 3, characterized in that: The liquid spraying part comprises a rotating water tank (94) fixedly connected to the bottom of the rotating shaft (93) and a first flushing pipe (95) and a second flushing pipe (96) installed at the bottom of the rotating water tank (94). The connecting pipe 1 is connected to the rotating water tank (94) in each liquid spraying assembly through a plurality of branch pipes.

5. A circulating water polarization flocculation descaling system according to claim 4, characterized in that: The No. 1 flushing pipe (95) in the liquid spraying part at both ends of the electrolytic cell (4) is fixed at a position close to the edge of the lower surface of the rotating water tank (94), and the No. 2 flushing pipe (96) in the liquid spraying part at both ends of the electrolytic cell (4) is fixed at a position close to the middle of the lower surface of the rotating water tank (94).

6. A circulating water polarization flocculation descaling system according to claim 4, characterized in that: The No. 1 flushing pipe (95) in the liquid spraying part in the middle of the electrolytic cell (4) is fixed to the edge of the rotating water tank (94), and the liquid spraying part in the middle of the electrolytic cell (4) includes two No. 2 flushing pipes (96), one of which is fixed to the edge of the lower surface of the rotating water tank (94), and the distance from the lower end of the No. 1 flushing pipe (95) to the axis of the rotating water tank (94) is greater than the distance from the lower end of the No. 2 flushing pipe (96) to the axis of the rotating water tank (94), and the other No. 2 flushing pipe (96) is fixed to the middle of the lower surface of the rotating water tank (94).

7. A circulating water polarization flocculation descaling system according to any one of claims 4 to 6, characterized in that: The No. 2 flushing pipe (96) comprises a straight pipe fixed at the bottom of the rotating water tank (94), a three-way joint fixed at the bottom of the straight pipe, and flushing pipes connected to both ends of the three-way joint. The lower ends of all the No. 1 flushing pipes (95) and the two flushing pipes in the No. 2 flushing pipe (96) are covered with rubber soft sleeves.

8. The circulating water polarization flocculation descaling system according to claim 1, characterized in that: The ultrasonic transducer receives the electrical signal generated by the ultrasonic generator and converts the electrical signal into mechanical vibration.

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