Purifying device for wire drawing liquid

Abstract

The utility model provides a purification device for wire drawing liquid, and relates to the technical field of metal processing. Specifically, the purification device for the wire drawing liquid comprises the following operation units which are connected in sequence: a centrifugal separation unit, an oil-water separation unit, an electro-deposition unit, an electrostatic adsorption unit and a collection unit. According to the device disclosed by the utility model, firstly, large-particle metal scraps in the waste liquid are separated through centrifugal treatment, then, oily substances are separated, then, soluble metal ions are separated, and finally, metal particles are adsorbed and removed; according to the waste wire drawing liquid purification device, the purification rate of the waste wire drawing liquid can reach more than 95%, high-quality and high-efficiency purification of the wire drawing liquid is realized, and the treatment cost of the waste wire drawing liquid and the wire drawing liquid cost in metal wire drawing production are greatly saved.

Description

Technical Field

[0001] This utility model relates to the field of metal processing technology, and more specifically, to a purification device for wire drawing fluid. Background Technology

[0002] Wire drawing fluid is an industrial lubricant widely used in metal processing, playing a crucial role, especially in the production of metal wire. Its main components typically include organic compounds, mineral oil, emulsifiers, surfactants, and antioxidants. These components work together to achieve numerous important functions such as lubrication, cleaning, cooling, and rust prevention. The quality of the wire drawing fluid directly affects the surface quality and processing performance of the metal wire. However, as the metal drawing process continues, friction occurs between the metal wire and the die, resulting in the accumulation of numerous metal shavings in the fluid. These shavings are fine and difficult to remove; if the wire drawing fluid is not purified in a timely manner, it will severely impact the quality of subsequent wire drawing. Therefore, there is an urgent need to develop an effective method for purifying wire drawing fluid and to implement it in a standardized manner.

[0003] Currently, many companies are unable to effectively purify their drawing fluids after use, resulting in significant waste and increased production costs. Existing technologies have addressed this drawback and developed a series of devices for purifying drawing fluids. For example, in one drawing fluid purification device, debris in the waste fluid easily clogs the filter screen, requiring frequent disassembly and cleaning by operators, making the operation complex. Another example is the addition of corrosion inhibitors during the treatment of drawing fluid waste. After purification, these inhibitors remain in the drawing fluid, unable to be eliminated or discharged, requiring additional equipment for extraction or harmless treatment.

[0004] In view of the above, this utility model is hereby proposed. Utility Model Content

[0005] The purpose of this invention is to provide a purification device for drawing fluid, so as to effectively purify the drawing fluid after metal drawing and meet the standard for recycling the drawing fluid; effectively reduce the production cost of metal drawing processing, and at the same time avoid the waste of drawing fluid resources.

[0006] In order to achieve the above-mentioned objectives of this utility model, the following technical solution is adopted:

[0007] A purification device for drawing fluid includes the following operating units connected in sequence: a centrifugal separation unit, an oil-water separation unit, an electrodeposition unit, an electrostatic adsorption unit, and a collection unit;

[0008] The centrifugal separation unit is used to separate the metal solid phase in the drawing solution;

[0009] The oil-water separation unit is used to separate the oil phase in the drawing fluid after the centrifugal separation unit has been processed.

[0010] The electrodeposition unit is used to separate soluble metal ions from the drawing solution after the oil-water separation unit has been processed.

[0011] The electrostatic adsorption unit is used to separate metal particles from the drawing solution after the electrodeposition unit has processed them.

[0012] The collection unit is used to store the purified drawing fluid.

[0013] Preferably, the purification device further includes a storage unit connected to the centrifugal separation unit; the storage unit and the collection unit are independently selected from one of vertical or horizontal storage tanks, liquid storage pools or liquid storage towers.

[0014] Preferably, the centrifugal separation unit is provided with a separator and a collector coaxially arranged with the separator; the bottom of the collector is provided with a liquid phase passage and a switching element for controlling the liquid phase passage, and the liquid phase passage is connected to the oil-water separation unit.

[0015] Preferably, the oil-water separation unit is provided with a perforated plate and an oil filter plate; the perforated plate is disposed at the upper part of the oil-water separation unit, and the oil filter plate is disposed at the lower part of the oil-water separation unit.

[0016] Preferably, the porous plate is a plate with a plurality of pores; the diameter of each pore is 0.5μm to 2μm; and the ratio of the total area of ​​the pores to the area of ​​the porous plate is 0.3 to 0.4.

[0017] More preferably, the oil filter plate includes at least one filter membrane and at least one semi-permeable membrane, and the filter membrane is disposed on the upper part of the semi-permeable membrane; the pore size of the filter membrane is 0.05μm to 0.4μm; the semi-permeable membrane is used to filter out oil.

[0018] Preferably, the oil-water separation unit is provided with a thermal control system and a heating component; the heating component is disposed on the top, outside or inside of the oil-water separation unit in one or more ways.

[0019] Preferably, the electrodeposition unit is provided with a cathode, an anode, a power supply, and circuitry; the cathode includes either a silver electrode or a copper electrode, and the anode includes a graphite electrode.

[0020] Preferably, the electrostatic adsorption unit is provided with a high-voltage power supply assembly and an electrostatic generation assembly; the high-voltage power supply assembly includes a power supply and a high-voltage electrode; the electrostatic generation assembly includes a power transmission belt and a scraping needle array; wherein, the power supply is connected to the scraping needle array; the high-voltage electrode is fixed on the rotating shaft of the power transmission belt and is electrically connected to the power transmission belt; the scraping needle array is connected to the power supply and the power transmission belt respectively.

[0021] Preferably, the electrodeposition unit and the electrostatic adsorption unit are independently provided with safety components; the safety components include one or more of the following: overvoltage protection components, overcurrent protection components, overtemperature protection components, or short-circuit protection components.

[0022] Compared with existing technologies, the beneficial effects of this invention are as follows: This invention provides a purification device for purifying waste drawing liquid and realizing its recycling, mainly comprising five functional modules: a centrifugal separation unit, an oil-water separation unit, an electrodeposition unit, an electrostatic adsorption unit, and a collection unit. This invention can achieve a purification rate of over 95% for waste drawing liquid, realizing high-quality and high-efficiency purification of the drawing liquid, greatly saving the treatment cost of waste drawing liquid and the cost of drawing liquid in metal wire drawing production. Attached Figure Description

[0023] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the structure of the wire drawing liquid purification device provided by this utility model.

[0025] Figure label:

[0026] 1-Centrifugal separation unit; 2-Separator;

[0027] 3-Collector; 4-Oil-water separation unit;

[0028] 5-Perforated plate; 6-Oil filter plate;

[0029] 7 - Electrodeposition unit; 8 - Cathode;

[0030] 9-Anode; 10-Electrostatic adsorption unit;

[0031] 11-High voltage power supply assembly; 12-Static electricity generation assembly;

[0032] 13-Collection Unit. Detailed Implementation

[0033] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings and specific embodiments. However, those skilled in the art will understand that the embodiments described below are only some embodiments of this utility model, not all embodiments, and are only used to illustrate this utility model, and should not be regarded as limiting the scope of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model. Where specific conditions are not specified in the embodiments, conventional conditions or conditions recommended by the manufacturer shall be followed. Where the manufacturers of reagents or instruments are not specified, they are all conventional products that can be purchased commercially.

[0034] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0035] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0036] This utility model is achieved through the following technical solution: a purification device for drawing fluid, comprising the following operating units connected in sequence: a centrifugal separation unit 1, an oil-water separation unit 4, an electrodeposition unit 7, an electrostatic adsorption unit 10, and a collection unit 13. Figure 1 The diagram shown is a structural schematic of the purification device for the drawing fluid of this utility model.

[0037] In this utility model, each functional unit performs the following functions: The centrifugal separation unit 1 is mainly used to centrifuge the initial wire drawing waste liquid, separating the metal solid phase (mainly metal particles, metal shavings, etc.) in the liquid phase through centrifugal force; further, the oil-water separation unit 4 separates the liquid phase discharged from the pre-treatment unit into oil and water, mainly separating and removing the oil phase including lubricating oil, cutting oil, or cooling oil; further, the electrodeposition unit 7 electrolyzes the aqueous phase discharged from the pre-treatment unit to achieve the deposition of soluble metal ions on the electrode, thereby separating and removing soluble impurities in the aqueous phase; further, the electrostatic adsorption unit 10 electrostatically adsorbs the liquid phase discharged from the pre-treatment unit, adsorbing the residual trace amounts of metal shavings or metal oxides in the liquid phase through high-voltage electrostatic adsorption, thereby achieving complete purification of the wire drawing waste liquid; further, the collection unit 13 collects and stores the purified wire drawing liquid.

[0038] The applicable objects of the purification device of this utility model, namely the wire drawing waste liquid mentioned above, can be understood as the waste liquid used in the metal wire production process that has completely or partially lost its auxiliary wire drawing function after a period of use. Since no other reagents that are prone to chemical reactions are introduced in this utility model, the purification device of this utility model is applicable to the waste liquid generated by any conventional or unconventional wire drawing liquid.

[0039] In a preferred embodiment, the purification device further includes a storage unit connected to the centrifugal separation unit 1; the storage unit is used to collect and store the wire drawing waste liquid to be purified collected from the metal wire drawing production line.

[0040] As a preferred embodiment, the storage unit and / or the collection unit 13 includes, but is not limited to, vertical or horizontal storage tanks, liquid storage pools, liquid storage towers, etc.; those skilled in the art can make any selection based on the actual processing capacity of the purification device, and can arbitrarily customize the volume of the storage unit and / or the collection unit 13; the storage unit and / or the collection unit 13 are not limited to open or closed structures, or materials such as metal, fiberglass, or concrete.

[0041] In a preferred embodiment, the centrifugal separation unit 1 is provided with a separator 2 and a collector 3 disposed outside the separator 2; wherein, the separator 2 includes a rotatable cylindrical structure, and the collector 3 is a non-rotatable cylindrical structure; the bottom of the collector 3 is provided with a liquid phase passage and a switching element for controlling the liquid phase passage, and the liquid phase passage is connected to the oil-water separation unit 4.

[0042] In addition, the centrifugal separation unit 1 is also equipped with a motor and drive system connected to the separator 2, which provides power to the centrifugal separation unit 1 and basic centrifugal parameter settings. Since the motor and drive system are usually located at the bottom of the separator 2 or in the outer packaging of the collector 3, their position is relatively free, and therefore not... Figure 1 This is reflected in the text.

[0043] In a more preferred embodiment, the liquid phase passage can be a detachable water pipe structure or a fixed metal or non-metal pipe; when there is no height difference between the bottom of the collector 3 and the centrifugal separation unit 1, a water pump or similar power element should also be provided on the liquid phase passage to transport the liquid phase collected by the collector 3 to the oil-water separation unit 4.

[0044] In a more preferred embodiment, a fixed shaft is provided at the center of the inner cavity of the cylindrical structure; a filter assembly (such as a filter screen, filter cloth, etc.) and several micropores for liquid phase passage are provided on the inner wall of the cylindrical structure.

[0045] In a more preferred embodiment, the centrifugal separation unit 1 is further provided with one or both of a control system or a safety protection system.

[0046] In a preferred embodiment, the operation method of the centrifugal separation unit 1 includes: pouring the waste liquid from the drawing process into the separator 2 through the top, and then covering the separator 2 with its lid; controlling the opening of the centrifugal separation unit 1, setting necessary parameters such as centrifugal speed and centrifugal time, and then starting the centrifugal operation of the centrifugal separation unit 1; after the centrifugal operation is completed, the liquid phase is located in the collector 3 outside the separator 2, while the solid phase is separated in the separator 2; opening the lid of the separator 2 and collecting the solid phase therein, and transporting the liquid phase collected in the collector 3 to the oil-water separation unit 4.

[0047] In a preferred embodiment, the oil-water separation unit 4 is provided with a perforated plate 5 and an oil filter plate 6, with the perforated plate 5 located at the upper part of the oil-water separation unit 4 and the oil filter plate 6 located at the lower part of the oil-water separation unit 4. The perforated plate 5 guides the diversion of the wire drawing waste liquid transported by the pre-processing unit, acting as a buffer to ensure that the liquid phase falls relatively evenly and distributes onto the surface of the oil filter plate 6; the oil filter plate 6 is used to achieve oil-water separation.

[0048] In a more preferred embodiment, the porous plate 5 and / or the oil filter plate 6 are horizontally arranged inside the oil-water separation unit 4, and can cover the space inside the oil-water separation unit 4 in a certain horizontal direction, so as to ensure that the wire drawing waste liquid transported by the unit will necessarily pass through the porous plate 5 and the oil filter plate 6 in sequence.

[0049] In a more preferred embodiment, the porous plate 5 is a plate with a plurality of pore structures, and the pore diameter of the porous plate 5 is 0.5μm to 2μm, more preferably 1μm.

[0050] In a more preferred embodiment, the ratio of the total pore area of ​​the porous plate 5 to the area of ​​the porous plate 5 is 0.3 to 0.4, and more preferably 0.35.

[0051] Therefore, based on the parameters of the porous plate 5 described above, those skilled in the art can calculate the number of holes in the porous plate 5 according to the specifications of the oil-water separation unit 4. As for the hole distribution of the porous plate 5, it can be arranged in a grid, stepped, or random manner, etc., to ensure that the holes are uniformly distributed as a whole. This utility model does not impose any substantial restrictions on the hole distribution.

[0052] In a more preferred embodiment, the oil filter plate 6 is provided with at least one filter membrane and at least one semi-permeable membrane from top to bottom. The filter membrane, the plate, and the semi-permeable membrane are integrated to form the oil filter plate 6. The filter membrane further removes large particles such as tiny particles, suspended solids, and colloidal substances from the solution, improving the efficiency of subsequent oil phase separation. The semi-permeable membrane is a selective permeable membrane that allows only water molecules and metal ions in the solution to pass through, but does not allow oil molecules to pass through, thereby achieving the purpose of water-oil separation by preventing the oil phase from passing through.

[0053] As a further preferred embodiment, the pore size of the filter membrane is 0.05μm to 0.4μm; it is understood that the pore size of the filter membrane is 5 to 10 times smaller than the pore size of the porous plate, which is used to further filter out tiny impurities; the semi-permeable membrane is used to filter out oil while allowing water to pass through at the same time, and the material of the semi-permeable membrane includes, but is not limited to, polypropylene, polyurethane, polysulfide membrane, etc., and the semi-permeable membrane that meets the above functions can be obtained through conventional commercial channels.

[0054] In a preferred embodiment, the oil-water separation unit 4 is further provided with a thermal control system and a heating component. It is worth noting that the heating component is located on the top, outside, or inside of the oil-water separation unit 4 in one or more ways, and achieves different effects such as ensuring that the wire drawing waste liquid delivered by the pre-unit has reached the specified temperature before the oil-water separation operation, providing a suitable oil-water separation operation temperature, adjusting the oil phase emulsification, and ensuring the normal operation of the oil-water separation operation.

[0055] In a preferred embodiment, the bottom of the oil-water separation unit 4 is provided with a liquid phase passage and a switching element for controlling the liquid phase passage, and the liquid phase passage is connected to the electrodeposition unit 7. In a more preferred embodiment, the liquid phase passage of the oil-water separation unit 4 can be a detachable water pipe structure or a fixed metal or non-metal pipe; when there is no height difference between the bottom of the oil-water separation unit 4 and the electrodeposition unit 7, a water pump or similar power element should also be provided on the liquid phase passage to transport the water phase collected by the oil-water separation unit 4 to the electrodeposition unit 7.

[0056] As a preferred embodiment, the operation method of the oil-water separation unit 4 includes: selectively inputting the liquid phase separated by the pre-treatment unit into the top of the working container of the oil-water separation unit 4 by means of spraying, pouring, water pipe diversion, etc., so that the liquid phase passes through the porous plate 5 and the oil filter plate 6 in sequence, and obtains the water phase after oil phase separation at the bottom of the oil-water separation unit 4, and then further transporting the water phase to the electrodeposition unit 7.

[0057] In a preferred embodiment, the electrodeposition unit 7 is provided with a cathode 8, an anode 9, and a power supply and lines connected to the cathode 8 and the anode 9; the lines enable the connection of the cathode 8, the anode 9, and the power supply to form the necessary electrical path.

[0058] In a more preferred embodiment, the cathode 8 includes a silver electrode or a copper electrode, and the anode 9 includes a graphite electrode; the shapes of the cathode 8 and the anode 9 are not limited, including but not limited to block, plate, rod, etc.

[0059] In a preferred embodiment, the bottom of the electrodeposition unit 7 is provided with at least one water outlet, and similarly, a liquid phase passage and a switching element for controlling the liquid phase passage are provided at the water outlet. The liquid phase passage is connected to the electrostatic adsorption unit 10. In a more preferred embodiment, the liquid phase passage of the electrodeposition unit 7 can be a detachable water pipe structure or a fixed metal or non-metal pipe. When there is no height difference between the bottom of the electrodeposition unit 7 and the electrostatic adsorption unit 10, a water pump or similar power element should also be provided on the liquid phase passage to transport the liquid phase processed by the electrodeposition unit 7 to the electrostatic adsorption unit 10.

[0060] In a preferred embodiment, the operation method of the electrodeposition unit 7 includes: inputting the liquid phase processed by the pretreatment unit into the processing container of the electrodeposition unit 7, ensuring that the cathode 8 and the anode 9 are in the liquid phase; turning on the power supply and performing electrodeposition according to the set voltage, current, and time parameters, so that metal ions in the liquid phase are deposited into the cathode 8; after the deposition is completed, optionally detecting the content of remaining metal ions in the liquid phase, and then transporting the processed liquid phase to the electrostatic adsorption unit 10. It is understood that the cathode 8 has a certain service life and needs to be replaced or processed in a timely manner according to the deposition status of the cathode 8.

[0061] In a preferred embodiment, the electrostatic adsorption unit 10 is provided with a high-voltage power supply assembly 11 and an electrostatic generation assembly 12; wherein, the high-voltage power supply assembly 11 is used to provide stable high voltage, and the electrostatic generation assembly 12 is used to generate static electricity;

[0062] Furthermore, the high-voltage power supply assembly 11 includes a power supply and a high-voltage electrode; the electrostatic generation assembly 12 includes a power transmission belt and a scraping needle array. One end of the power supply is grounded, and the power supply is connected to the scraping needle array; the high-voltage electrode is fixed on the rotating shaft of the power transmission belt and is electrically connected to the power transmission belt; the scraping needle array is connected to both the power supply and the power transmission belt; the power transmission belt is connected to both the high-voltage electrode and the scraping needle array.

[0063] In a preferred embodiment, the electrodeposition unit 7 and / or the electrostatic adsorption unit 10 are further provided with safety components, including one or more of the following: overvoltage protection components, overcurrent protection components, overtemperature protection components, or short circuit protection components.

[0064] In a preferred embodiment, the bottom of the electrostatic adsorption unit 10 is provided with a liquid phase passage and a switching element for controlling the liquid phase passage, and the liquid phase passage is connected to the collection unit 13. In a more preferred embodiment, the liquid phase passage of the electrostatic adsorption unit 10 can be a detachable water pipe structure or a fixed metal or non-metal pipe.

[0065] In a preferred embodiment, the operation method of the electrostatic adsorption unit 10 includes: inputting the liquid phase processed by the pre-treatment unit into the processing container of the electrostatic adsorption unit 10; firstly, turning on the power supply according to the set voltage or current to energize the scraper needle array, so that it energizes the transmission belt; the transmission belt generates an electrostatic field on the surface of the high-voltage electrode; at this time, when the liquid phase to be treated in the electrostatic adsorption unit 10 approaches the electrostatically charged high-voltage electrode, the tiny metal particles in the liquid phase are induced to have an electrical charge opposite to that of the electrostatically charged electrode, and are thus adsorbed onto the electrode surface, thereby realizing the electrostatic adsorption treatment of the liquid phase; after a period of treatment, the electrostatically adsorbed liquid phase is transported to the collection unit 13.

[0066] Furthermore, the drawing fluid purified by this invention is obtained in the collection unit 13; those skilled in the art can store the drawing fluid as needed, or transport it to a metal drawing production line for recycling.

[0067] Although the present invention has been illustrated and described with specific embodiments, it should be understood that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it; those skilled in the art should understand that modifications can be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein, without departing from the spirit and scope of the present invention; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention; therefore, this means that all such substitutions and modifications that fall within the scope of the present invention are included in the appended claims.

Claims

1. A purification device for wire drawing liquid, characterized by comprising: The purification device of the wire drawing liquid comprises the following operation units connected in sequence: a centrifugal separation unit, an oil-water separation unit, an electrodeposition unit, an electrostatic adsorption unit and a collection unit; The centrifugal separation unit is used for separating the metal solid phase in the wire drawing liquid; The oil-water separation unit is used for separating the oil phase in the wire drawing liquid processed by the centrifugal separation unit; The electrodeposition unit is used for separating the soluble metal ions in the wire drawing liquid processed by the oil-water separation unit; The electrostatic adsorption unit is used for separating the metal particles in the wire drawing liquid processed by the electrodeposition unit; The collection unit is used for storing the purified wire drawing liquid.

2. The device for purifying a drawing liquid according to claim 1, characterized by The purification device further comprises a storage unit connected with the centrifugal separation unit; The storage unit and the collection unit are independently selected from one of a vertical or horizontal storage tank, a liquid storage pool or a liquid storage tower.

3. The device for purifying a drawing liquid according to claim 1, wherein The centrifugal separation unit is provided with a separator and a collector coaxially arranged with the separator; The bottom of the collector is provided with a liquid phase passage and a switch element for controlling the liquid phase passage, and the liquid phase passage is connected with the oil-water separation unit.

4. The apparatus for purifying a drawing liquid according to claim 1, wherein The oil-water separation unit is provided with a porous plate and an oil filter plate; The porous plate is arranged at the upper part of the oil-water separation unit, and the oil filter plate is arranged at the lower part of the oil-water separation unit.

5. The device for purifying a drawing liquid according to claim 4, wherein The porous plate is a plate material with a plurality of pores; The pore diameter of each pore is 0.5-2 μm; The ratio of the total area of the pores to the area of the porous plate is 0.3-0.

4.

6. The device for purifying a drawing liquid according to claim 4, wherein The oil filter plate comprises at least one filter membrane and at least one semi-permeable membrane, and the filter membrane is arranged at the upper part of the semi-permeable membrane; The pore diameter of the filter membrane is 0.05-0.4 μm; and the semi-permeable membrane is used for filtering oil.

7. The apparatus for purifying a drawing liquid according to claim 1, wherein The oil-water separation unit is provided with a heat control system and a heating assembly; The heating assembly is arranged at one or more of the top, the outside or the inside of the oil-water separation unit.

8. The apparatus for purifying drawing liquid according to claim 1, wherein The electrodeposition unit is provided with a cathode, an anode, a power supply and a circuit; The cathode comprises one of a silver electrode or a copper electrode, and the anode comprises a graphite electrode.

9. The apparatus for purifying drawing liquid according to claim 1, wherein The electrostatic adsorption unit is provided with a high-voltage power supply assembly and an electrostatic generation assembly; The high-voltage power supply assembly comprises a power supply and a high-voltage electrode; and the electrostatic generation assembly comprises a power transmission belt and a scraping electrode needle row; The power supply is connected with the scraping electrode needle row; the high-voltage electrode is fixed on the rotating shaft of the power transmission belt and is electrically connected with the power transmission belt; and the scraping electrode needle row is connected with the power supply and the power transmission belt, respectively.

10. The apparatus for purifying drawing liquid according to claim 1, wherein The electrodeposition unit and the electrostatic adsorption unit are independently provided with a safety assembly; The safety assembly comprises one or more of an overvoltage protection assembly, an overcurrent protection assembly, an overtemperature protection assembly or a short circuit protection assembly.

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