Electrically-driven coupling solid-liquid separation device for refining electrolyte

Abstract

The invention relates to an electrically-driven coupling solid-liquid separation device for electrolyte refining. The electrically-driven coupling solid-liquid separation device comprises an integrated electrically-driven coupling separation device, a discrete electrically-driven coupling separation device and a combination of one or more of specific technological processes or processes. The method is applied to rare earth smelting, seawater electrolysis, chlor-alkali industry and environmental protection, and the total salt-solid content can be reduced from 38% to 0.5% or below and the restrictive ion content is reduced to 0.0028% or below on the premise of ensuring the production efficiency; compared with an inclined plate settling tank in the prior art, micro-nano particles in suspension liquid are removed at a high speed with extremely low energy consumption, the service life of an ionic membrane and an electrode plate of an electrolytic tank is remarkably prolonged, and the operation cost is further reduced.

Description

Technical Field

[0001] This invention spans the fields of rare earth smelting, seawater electrolysis, chlor-alkali industry and environmental protection, and specifically relates to the purification and refining of high-salinity water before electrolysis, particularly to an electrically driven coupled solid-liquid separation device. Background Technology

[0002] In-depth research shows that, regardless of rare earth smelting, seawater electrolysis, or the chlor-alkali industry, in order to achieve high-efficiency and low-cost electrolysis of high-salinity wastewater, seawater, and brine, the electrolyte must be purified before electrolysis—removing limiting ions, organic matter, and other impurities. This is a high-cost process and a technical challenge, and there is still room for further improvement in existing technologies.

[0003] Taking the predicament of the rare earth industry as an example, regardless of whether mining is conducted on land or in the deep sea, its environmental costs are considered the essential logic of the global rare earth competition. Wastewater from the rare earth industry contains inorganic salts at concentrations exceeding 30%, as well as complex organic compounds. Specifically, this includes extremely high levels of at least two of the following: sulfate groups, chloride ions, sodium ions, ammonium ions, silicate groups, calcium ions, and magnesium ions; normal levels of alkyl phosphates, phosphate esters, alkyl carboxylic acids, and hydrocarbon organic matter; and trace levels of heavy metal ions. If these components are discharged directly without treatment, it not only wastes resources but also severely pollutes the environment of the surrounding sea and river areas, damaging the ecosystem and causing observable, long-term, irreversible harm to humans and animals.

[0004] Embedded electrolytic treatment technology has been recognized as the most effective and lowest-cost process route.

[0005] With the maturity and industrialization of wind power, photovoltaic power, and tidal power technologies, inexpensive energy has been provided for wastewater treatment in deep-sea rare earth mining and for the electrolysis of seawater to produce chlor-alkali. However, the large number of impurity ions such as magnesium, calcium, and sulfate in seawater can poison the expensive ion exchange membranes in the electrolyzers, greatly reducing production efficiency and shortening the overall service life of the electrolyzers.

[0006] Therefore, solving the problem of electrolyte purification before electrolysis in a high-efficiency and low-cost manner is the direction of the "green chlor-alkali" project for producing sodium hydroxide by electrolysis of seawater in the new energy sector.

[0007] Although existing technologies for purifying electrolytes before electrolysis are quite mature in the modern chlor-alkali industry, they all use inclined plate settling tanks. The biggest drawback of these technologies is their low settling efficiency. Because they cannot efficiently separate suspended particles at the micron and nanoscale, they cannot effectively extend the service life of the ion exchange membrane in the electrolyzer to achieve the goals of energy conservation and emission reduction.

[0008] Therefore, it is necessary to invent an electrolyte refining and separation device with high sedimentation efficiency, higher purification accuracy, and low cost. Summary of the Invention

[0009] The purpose of this invention is to provide an electrolyte purification and separation device with high sedimentation efficiency, higher purification accuracy, and low cost.

[0010] To achieve the above objectives, the present invention provides an electro-driven coupling solid-liquid separation device for electrolyte refining, comprising: an integrated electro-driven coupling separation device, a discrete electro-driven coupling separation device, and a combination of one or more of a specific process flow or procedure; wherein, the electro-driven coupling further includes...

[0011] At least one of a positive and negative electrode mechanism capable of loading constant voltage or oscillating voltage and a kinetic energy fluctuation mechanism is coupled with at least one of a material separation device and a chemical reaction device to produce a synergistic effect on at least one function of material migration, diffusion, volatilization and chemical reaction.

[0012] The electrode structure further includes one or more of the following: an electrically driven coupled settling plate, an electrically driven coupled catalytic plate, and a permeable electrically driven coupled catalytic plate.

[0013] The kinetic energy fluctuation mechanism further includes one or more combinations of ultrasonic multi-frequency transducers and mechanical vibrators;

[0014] The separation device further includes one or more of the following: a solid-liquid separation device or solid-liquid separation interface, a gas-liquid separation device or gas-liquid separation interface, a gas-solid separation device or gas-solid separation interface, a filter or filtration interface.

[0015] The chemical reaction apparatus further includes one or more of the following: a mixing and metathesis apparatus, a crystallization apparatus and / or a dissolving apparatus, a tank reactor, a tubular reactor, and a tower reactor.

[0016] See Figures 1 to 3 —The integrated electric drive coupling and decoupling device also includes

[0017] Coaxial differential power mechanism 2 External drive shaft 4 Kinetic energy fluctuation mechanism or preferably ultrasonic multi-frequency transducer 6 Mixing reaction vessel (inner tank) 8 Settling and clarification tank (outer tank) 9 Internal transmission mud rake 11 Cooling heat exchanger 13 , horn diffuser 14 Grid-shaped rectifier grid 15 Or cylinder, stirring paddle 17 Filter 18 overflow trough 19 Electric drive coupled settling inclined plate 21 ;

[0018] Wastewater inlet pipe1 and precipitant feeding station 3 With inner bucket 8 Top connection, coaxial differential power mechanism 2 Fixed in the inner tub 8 The top of the inner barrel or the area near the central axis. 8 Located in the outer barrel 9 The upper part and the centerlines of the two parts coincide or are eccentric, the inner tub 8 With outer barrel 9 The beams are connected as a whole using fasteners or welding, and the internally driven mud rake... 11 Extending to the outer barrel 9 The bottom and the rotating shaft are coaxial with the differential power mechanism 2 Connection, external drive shaft 4 Located in the inner barrel 8 Central area and mixing blade 17 Secure the connection within the inner tub. 8 The bottom end connects to the horn diffuser. 14 And tighten the connection at the horn diffuser. 14 Internally installed fixed grid-shaped rectifier grid 15 Or a cylindrical array, cooling heat exchanger 13 Located at the horn diffuser 14 Bottom end and internal transmission mud rake 11 The space between the upper parts is arranged on the coaxial differential power mechanism. 2 Around the inner shaft, a cooling heat exchanger. 13 The inlet and outlet of the internal heat carrier transport pipe pass through the outer barrel wall and the outer barrel. 9 Fastening connection, filter 18 Located in the outer barrel 9 Shoulder and overflow trough 19 The cofferdam is fastened and connected, and the filter is securely installed. 18 The upper or lower surface of the outer barrel 9 At least one set of kinetic energy fluctuation mechanisms or preferably ultrasonic multi-frequency transducers are arranged around the radial half to two-thirds of the distance. 6 Ultrasonic multi-frequency transducer 6 With filters 18 The filter screen support is securely connected to the outer tub. 9 Clarified water outlet in the shoulder area 7 With overflow trough 19 connect;

[0019] Electric drive coupled settling inclined plate 21 Arranged in the filter 18 Below or in the filter 18 upstream and inner barrel 8On the peripheries in the divergent directions, the negative and positive electrodes of adjacent conductive layers are alternately arranged in any one or a combination of the ways of parallel layers, a mosquito-repellent incense coil drum-like manner, multi-layer scale-like manner, concentric circle manner, and a "hui" character shape; the electric drive coupled settling inclined plate 21 The included angle with the horizontal plane is between 45° and 90°; the electric drive coupled settling inclined plate 21 The maximum distance between is maintained between one-fiftieth and one-half of the shorter length of adjacent two electric drive coupled settling inclined plates 21 , but the minimum distance is greater than 4 mm;

[0020] See Figure 4 and Figure 5 —Among them, the discrete electric drive coupled separation device further includes

[0021] Transforming the topological structure elements of the integrated electric drive coupled separation device into two and / or more than two independent unit structures or unit isolated device systems or unit combined device systems;

[0022] Among them, the specific process or process further includes

[0023] First, the high-salt wastewater passes through the high-salt wastewater inlet pipe 1 , and the precipitant composition [divided into precipitant composition (a) to precipitant composition (c)] passes through the precipitant feeding station 3 , and the two enter the mixing reaction zone 8 of the mixing reaction barrel (inner barrel) 5 synchronously or successively or continuously; the coaxial differential power mechanism 2 drives the outer transmission shaft 4 to drive the outermost edge of the stirring paddle 17 to rotate at a linear velocity of (0.5 - 2.0) m / s, controlling the suspension to have a residence time of (5 - 20) min in the mixing reaction zone 5 , so that the precipitant composition is evenly mixed with the saline wastewater, and at least one of the chemical reaction general formulas (1) to chemical reaction general formula (4) occurs with the ions soluble in the high-salt wastewater, generating reactive precipitates. According to the production needs, based on the "complexation, adsorption, concentration" effects of colloid chemistry, some soluble ions and groups can also have more accompanying mixed precipitates, which is beneficial to solid-liquid separation;

[0024]

[0025] In the above chemical reaction general formulas (1) to general formula (4),

[0026] M n+ —Metal ions of soluble salts with a valence of n≥2, such as Ca 2+ , Mg 2+The specific types and contents of metal ions depend on the mineral source, process, and raw material composition of the on-site factory.

[0027] A m- —The anion group of a soluble salt with a valence m ≤ -2, for example The specific types and contents of the anions are selectively added based on the mineral resources, processes, and raw material composition of the factory on site.

[0028] Cl - —Chloride ions (for example);

[0029] OH - —Hydroxylene (for example);

[0030] H + —Hydrogen ions (for example);

[0031] —Ammonium ion (for example);

[0032] —Potassium ions or sodium ions (for example);

[0033] m—valence or coordination coefficient;

[0034] n—valence or coordination coefficient;

[0035] —At least one salt substance in the precipitant composition (example);

[0036] —At least one acidic substance in the precipitant composition (example);

[0037] NH3—a type of alkaline substance in precipitant compositions (example);

[0038] Next, the reacted suspension flows downwards into the inner tank. 8 The lower grid-shaped rectifier grid 15 Or between the cylinders, the sewage is confined from a swirling flow to a direct current, and as it travels downwards to the funnel diffuser... 14 When the suspension channel expands rapidly, it transitions from turbulent to laminar flow, and reducing the velocity of the suspension is beneficial for the sedimentation of small solid particles.

[0039] The suspension then continues to flow downwards to the cooling (or heating) heat exchanger. 13In this region, the average temperature of the suspension is lowered from a higher value to below 5°C, causing supersaturated salts to form in the suspension, spontaneously precipitating crystalline precipitates (for example, a saturated NH4Cl solution at room temperature can be lowered to -19°C, and a saturated CaCl2 solution can be lowered to -17°C). Generally, the particle size of crystalline precipitates is relatively coarse, ranging from 0.1 to 3 mm, while the particle size of reactive precipitates is relatively fine, ranging from 0.01 to 100 μm, or they may aggregate into flocculent matter. During the sedimentation of crystalline and reactive precipitates, crystalline precipitates adsorb and entrain some reactive precipitates and settle rapidly in a Stokes manner, while other reactive precipitates, due to colloidal chemical effects, "complex, adsorb, and concentrate" some dissolved ions, and also overcome Brownian motion resistance to settle slowly.

[0040] Subsequently, after most of the solid and liquid components are separated, the suspension is cooled (or heated) in a heat exchanger. 13 The radial region turns upward and enters the electrically driven coupled settling ramp. 21 In the gap space of (or vertical plate), under the unidirectional induction, repulsion, and dragging effects of the negative and positive conductive layers, micron-sized and / or nano-sized particles accelerate towards and aggregate towards each layer of electrically driven coupled settling inclined plate, and easily converge towards the electrically driven coupled settling inclined plate. 21 The material adheres to the surface and accumulates, becoming thicker and thicker until the accumulated weight exceeds that of the electrically driven coupled settling inclined plate. 21 When the frictional support force is present, or in a kinetic energy fluctuation mechanism or preferably an ultrasonic multi-frequency transducer. 6 (Or, under the intermittent, periodic expulsion of backwash water or compressed air in the inclined slab sandwich layer coupled with permeability and air permeability, the sludge will slide down in chunks and clumps to the bottom discharge port.) 12 ;

[0041] Continuing, the suspension travels upwards to the filter. 18 At that time, unsettled floating micron- and / or nano-sized particles were filtered out. 18 The filter screen intercepts (for example, a typical single-segment filter can intercept over 97%), and the residue accumulates beneath the filter screen, eventually falling off in chunks. This, combined with the periodic activation of the ultrasonic multi-frequency transducer, further contributes to the problem. 6 The backwash mechanism works in conjunction with the filter to atomize the solution in the filter layer and generate a rapid expansion impact force, which pushes out particles that cannot fall off automatically and makes them flow downwards, which can significantly restore the porosity of the filter (for example, more than 95%).

[0042] Finally, the suspension containing only the remaining total dissolved solids and trace amounts of nanoscale precipitates will pass through the filter screen. 18 Flowing into the overflow tank 19 Then from the clarified water outlet 7 Move on to the next work section.

[0043] Furthermore, after treatment by the II-III stage electrically driven coupled solid-liquid separation device, the clarified water outlet... 7 In Table 4, if the content of various restrictive ions and groups is generally below 0.0028% and the total residual organic matter content is below 0.01%, it can enter the electrolytic cell.

[0044] Furthermore, the assembly includes: two or more processes, mechanisms, devices, and systems with their own independent functions, which are superimposed, combined, arranged, or connected to form a relatively complex process, mechanism, device, or system by means of pipelines and / or valves and / or electromechanical control mechanisms.

[0045] Furthermore, the consistency of the topological structural requirements includes: comparing the functional components after the breakdown of two or more types of mechanisms, equipment, devices, and systems. Regardless of whether there are differences in the size, material, or performance of the functional components, as long as the structure of the functional components is similar and the function is consistent, the two or more types of mechanisms, equipment, devices, and systems are considered to have similar or consistent topological structural requirements.

[0046] refer to Figure 4 and Figure 5 ——

[0047] Furthermore, the deformation of the topological components includes: disassembling and deforming the topological components of one or more subsystems of the integrated electric drive coupling separation device into hybrid reaction heat exchange units. 511 and electric drive coupling purification unit 513 Two independent unit structures; or split and deformed into mixed reaction units. 521 Heat exchange unit 522 Electric drive coupling purification unit 523 A combination of one or more of the three independent unit structures.

[0048] The two independent unit structures also include

[0049] Process material inlet pipe 1.1 Rapid power mechanism 2.1 1. Precipitator feeding station 3 , high-speed drive shaft 4.1 Mixed reaction zone 5.1 Mixing reaction tank 8.1 Jacketed heat exchanger 13a Spiral or shell-and-tube heat exchangers 13b , stirring paddle 17 ; kinetic energy fluctuation mechanism or preferably ultrasonic multi-frequency transducer 6 1. Suspended buffer tank (inner tank) 8.2 Settling and clarification tank (outer tank) 9 Internal transmission mud rake 11 , mud discharge port12 , horn diffuser 14 Grid-shaped rectifier grid 15 Or cylinder, filter 18 overflow trough 19 Electric drive coupled settling inclined plate 21 ;

[0050] Process material inlet pipe 1.1 1. Precipitator feeding station 3 Placed in a mixing reaction vessel 8.1 Shoulder area, rapid power mechanism 2.1 Placed in a mixing reaction vessel 8.1 The shaft center and the fast drive shaft 4.1 The power linkage extends to the bottom and connects with the agitator. 17 Fastened connections, spiral or shell-and-tube heat exchangers 13a Jacketed heat exchanger located around the power connecting rod 13b Mixed reaction zone 5.1 The area below the shoulders is wrapped up, and a jacketed heat exchanger is used according to production needs. 13a and / or spiral or shell-and-tube heat exchangers 13b It can be shut down, put into standby mode, or left as default.

[0051] suspension inlet pipe 1.2 With inner bucket 8.2 Top connection, slow-speed power mechanism 2.2 Fixed in the inner tub 8.2 The top of the inner barrel or the area near the central axis. 8.2 Located in the outer barrel 9 The upper part and the centerlines of the two parts coincide or are eccentric, the inner tub 8.2 With outer barrel 9 The beams are connected as a whole using fasteners or welding, and the internally driven mud rake... 11 Extending to the outer barrel 9 The bottom and the slow-speed power mechanism 2.2 Connection, in the inner bucket 8 The bottom end connects to the horn diffuser. 14 And tighten the connection at the horn diffuser. 14 Internally installed fixed grid-shaped rectifier grid 15 Or cylinder, filter 18 Located in the outer barrel 9 Shoulder and overflow trough 19 Upstream of the cofferdam, fastened connections are made at the filter. 18 The upper or lower surface of the outer barrel 9 At least one set of kinetic energy fluctuation mechanisms or preferably ultrasonic multi-frequency transducers are arranged around the radial half to two-thirds of the distance. 6 Ultrasonic multi-frequency transducer 6 With filters18 The filter screen support is securely connected to the outer tub. 9 Clarified water outlet and overflow trough in shoulder area 19 Connection; installed in the mixing reaction heat exchange unit according to production needs. 511 Purification unit coupled with electric drive 513 The power pumps between can be turned off, left on standby, or left at default.

[0052] The three independent unit structures also include

[0053] Process material inlet pipe 1.1 Rapid power mechanism 2.1 1. Precipitator feeding station 3 , high-speed drive shaft 4.1 Mixed reaction zone 5.1 Mixing reaction tank 8.1 , stirring paddle 17 Heat exchanger 13 ; Suspension inlet pipe 1.2 Slow-speed power mechanism 2.2 Slow-speed drive shaft 4.2 Floating buffer 5.2 Kinetic energy fluctuation mechanism or preferably ultrasonic multi-frequency transducer 6 Clear water outlet 7 1. Suspended buffer tank (inner tank) 8.2 Settling and clarification tank (outer tank) 9 Inlet and outlet of heat carrier transport pipe 10 Internal transmission mud rake 11 , mud discharge port 12 , horn diffuser 14 Grid-shaped rectifier grid 15 Or cylinder, manhole 16 Filter 18 overflow trough 19 Electric drive coupled settling inclined plate 21 ;

[0054] Process material inlet pipe 1.1 1. Precipitator feeding station 3 Placed in a mixing reaction vessel 8.1 Shoulder area, rapid power mechanism 2.1 Placed in a mixing reaction vessel 8.1 The shaft center and the power connecting rod extend to the bottom and the agitator. 17 Fastening connection;

[0055] Mixing reaction tank 8.1 The process material outlet at the bottom is connected to the heat exchanger via a pipe. 13 Process material inlet connection, heat exchanger 13 The process material outlet is connected to the electric drive purification unit via a pipeline.523 suspension inlet pipe 1.2 connect;

[0056] Electric drive coupling purification unit 523 The internal structure and connection relationship of the electric drive coupling purification unit 513 The topological requirements are consistent;

[0057] Based on the factory's site layout requirements, it is installed in the mixing reaction heat exchange unit. 521 With heat exchange unit 522 The power pumps between can be shut down, left on standby, or left at default.

[0058] The unit isolated device system also includes

[0059] A larger system is formed by connecting more than one subsystem directly without using pipelines and / or valves and / or electromechanical control mechanisms, but instead using transportation vehicles to achieve material flow or communication between the subsystems, thus indirectly constituting a larger system. The unit-combined system also includes...

[0060] More than one subsystem is connected in series and / or parallel to form a larger device system using piping and / or valves and / or electromechanical control mechanisms.

[0061] Further, the precipitant composition comprises:

[0062] A combination of any one or more of the following: acidic substances, alkaline substances, and salt substances;

[0063] Based on the fluctuations and differences in salinity, pH, and temperature of the wastewater treated in each stage of the electro-driven coupling solid-liquid separation device (sections I-II-III), the ratio of the total amount of precipitant composition added to the total salt and solid content of the wastewater is dynamically adjusted and controlled to be between (0.03-1.73) times, and the pH value is between 1.5 and 12.

[0064] The raw material components and relative proportions of the precipitant compositions were dynamically adjusted and subdivided into three groups of different precipitant compositions: (a), (b), and (c). For example...

[0065] pH 1.5–12, defined as precipitant composition (a), used for the first stage of electric drive coupling treatment;

[0066] pH 1.5–11, defined as precipitant composition (b), is used for the second stage of electro-drive coupling treatment;

[0067] pH 1.5–10, defined as precipitant composition (c), is used for the electro-coupled III-stage treatment;

[0068] The acidic substances also include

[0069] Chlorine gas or chlorine water, hydrochloric acid, sulfuric acid, phosphoric acid, pyrophosphate, polyphosphoric acid, oxalic acid, citric acid, carbon dioxide gas or carbonic acid, polyacrylic acid, C2-C 18 One or more combinations of carboxylic acids and their diluents;

[0070] The alkaline substances also include

[0071] Ammonia gas or ammonia water, sodium hydroxide, potassium hydroxide, calcium hydroxide, magnesium hydroxide, polyacrylamide, urea, biuret, triuret, or a combination thereof, and their dilutions.

[0072] The salt substances also include

[0073] A combination of one or more of the following: aluminum chloride, polyaluminum chloride, aluminum sulfate, ammonium sulfate, sodium sulfate, ammonium phosphate, polyphosphate, sodium phosphate, sodium metaphosphate, ammonium oxalate, sodium oxalate, ammonium citrate, sodium citrate, ammonium carbonate, sodium carbonate, ammonium bicarbonate, sodium bicarbonate, C2-C18 carboxylic acid ammonium salts and / or sodium salts, and their dilutions.

[0074] refer to Figure 3 ——

[0075] Furthermore, the electrically driven coupled settling inclined plate 21 It includes: at least one or a combination of two of the following: a single electrode settling plate and a composite electrode settling plate;

[0076] The single electrode settling inclined plate also includes

[0077] On the same plate, there is a single negative electrode conductive plate or a single positive electrode conductive plate, and the negative electrode conductive plate and the positive electrode conductive plate can be relatively displaced and / or fixed; the negative electrode conductive plate and the positive electrode conductive plate of each single electrode settling inclined plate are respectively connected to the constant voltage or oscillating waveform electric drive cathode power supply and electric drive anode power supply.

[0078] The composite electrode settling inclined plate also includes

[0079] A combination of at least one or more of the following: a solid electrically driven coupled settling ramp, a permeable or air-permeable electrically driven coupled settling ramp (with a hollow or piped sandwich layer that can be connected to backwash water or compressed air);

[0080] Negative conductive layers are fabricated on the top and bottom surfaces of the same integral plate. 21.3 and positive electrode conductive layer 21.5 There is an insulating layer between the negative and positive electrodes. 21.4 The three-layer fixed structure that makes up a sandwich cookie;

[0081] The tilt angle of the composite electrode settling ramp is determined by a displaceable or extendable support frame. 21.6 Dynamic adjustment or angle stop, negative electrode conductive layer 21.3 Through electrode connection point 21.2 Connected to a DC or oscillating waveform electric drive cathode power supply, positive electrode conductive layer 21.5 Through electrode connection point 21.2 Connect to a DC or oscillating waveform electric drive anode power supply;

[0082] Among them, the negative electrode conductive layer 21.3 and positive electrode conductive layer 21.5 Also includes

[0083] One or more of the following: carbon fiber cloth, carbon fiber mesh, carbon fiber nonwoven fabric, conductive coating, metal foil layer, metal plate or coated metal plate, metal mesh or coated metal mesh.

[0084] Wherein, the insulating layer 21.4 Also includes

[0085] A combination of one or more of the following: rubber, plastic, fiberglass, PCB, glass fiber reinforced rubber and plastic, ceramics, radiation cross-linked rubber and plastic sheets, air, or liquid;

[0086] The metal further includes any one or a combination of aluminum, iron, copper, nickel, titanium, and silver.

[0087] The coating further includes depositing an inert metal, such as any one or a combination of copper, nickel, titanium, silver, gold, ruthenium, rhodium, palladium, and platinum, on the outer surface of the metal.

[0088] The carbon fiber mesh further includes mesh sizes ranging from 30 mesh to 2000 mesh;

[0089] The carbon fiber nonwoven fabric further includes those with an equivalent pore size in the range of 30 mesh to 2000 mesh.

[0090] Furthermore, the ultrasonic multi-frequency transducer includes: one or more of the following: an integrated ultrasonic multi-frequency transducer and a discrete ultrasonic multi-frequency transducer, and the center frequency is distributed in at least two of the four frequency bands (20-51) Hz, (100-600) Hz, (10-31) kHz, and (1-3.5) MHz, and at least one center frequency is alternately executed.

[0091] The integrated ultrasonic multi-frequency transducer also includes

[0092] In terms of external structure, they are superimposed, combined, or integrated into a single component;

[0093] The discrete ultrasonic multi-frequency transducer also includes

[0094] In terms of external structure, it uses discrete components or assemblies that work together.

[0095] Furthermore, the mechanical vibrator includes a vibration mechanism powered by compressed gas and / or electricity.

[0096] Furthermore, the coaxial differential power mechanism includes: a commercially available coaxial differential power mechanism, or a power motor, reducer, coupling, inner drive shaft, outer driven shaft, inner support bearing, planetary gears (a pair of equal diameters), gear discs (two, one large and one small), and outer support bearing;

[0097] The output shaft of the power motor is connected to the input end of the reducer; the output end of the reducer is connected to the inner drive shaft via a coupling; the inner drive shaft is connected to the outer cylinder driven shaft via an inner support bearing and can rotate relative to it; the planetary gear is connected to the inner drive shaft (the rotation axis of the planetary gear is perpendicular to the inner drive shaft); the gear disc is connected to the outer cylinder driven shaft; the planetary gear meshes with the gear disc; and the outer cylinder driven shaft is positioned with an external support via an external support bearing.

[0098] The preferred power transmission path is: power motor → reducer → inner drive shaft → a pair of planetary gears → a set of gear discs (with speed increase relative to the inner drive shaft) → rotation of the outer cylinder driven shaft.

[0099] Furthermore, the heat exchanger includes one or more of the following: a coil heat exchanger, a shell-and-tube heat exchanger, a plate heat exchanger, a finned heat exchanger, and a mosquito coil-type drum heat exchanger.

[0100] Furthermore, the grid-shaped rectification grid includes: at least two pairs of parallel plates, with the meridional plates and latitudinal plates interlocking to form a grid structure, the included angle between the meridional plates and latitudinal plates being between 60° and 120°, and a height of (0.5 to 1.6) m and a side length of (0.25 to 0.9) m for each grid.

[0101] Furthermore, the filter includes one or more of the following: a barrel filter element, a tubular filter element, a bag filter, a flat filter, and a corrugated pleated filter.

[0102] The filter element and filter screen are a combination of one or more of the following: PP fiber cloth, PE fiber cloth, PTFE fiber cloth, PVDF fiber cloth, glass fiber cloth, foam ceramic, foam metal, metal wire mesh, and radiation cross-linked rubber and plastic fiber mesh.

[0103] Technical effect

[0104] The electro-driven coupled solid-liquid separation device for electrolyte purification of the present invention has had its beneficial technical effects verified in a scaled-down laboratory setting, which are impossible or unattainable by prior art.

[0105] 1) Section I, Technical Effects of the Electric Drive Coupling Separation Device

[0106] By utilizing a precipitant composition to induce a precipitation reaction, the removal of calcium, magnesium, and silicon compounds, restrictive ions and groups can be maximized, while also controllably adding a portion of soluble and difficult-to-precipitate compounds. K + The compounds undergo accompanying mixed precipitation;

[0107] With a refrigeration energy cost as low as less than 12% of that of triple-effect evaporation, it is possible to refrigerate soluble and non-precipitating substances. K + The compounds undergo supersaturated crystalline precipitation;

[0108] The overall effect is to reduce the total salt content from over 38% to below 25%, minimizing the loss of soluble ions and the energy consumption of subsequent electrolytic treatment.

[0109] 2) Technical effects of the electric drive coupling separation device in sections I-II-III

[0110] The adoption of the three-stage combined process makes the coordinated operation of the process more flexible and controllable.

[0111] The ratio of acid, alkali and salt components in precipitant compositions (a) to (c), the ratio of the total amount of precipitant composition added to the total salt content of wastewater are between (0.03 and 1.73) times, and the pH value is between 1.5 and 12. These ratios can be dynamically adjusted and controlled to achieve the purposeful adjustment of the precipitation ratio of impurities and some soluble salts.

[0112] The innovative design of the electrically driven coupled sedimentation inclined plate can capture micro-nano-sized precipitate particles that have slipped through the "separation device", accelerating the removal of micro-nano-sized particles in the suspension with extremely low "electrostatic" energy consumption. This significantly eliminates the frequency of restrictive ion and group blockage of the isolation membrane in the subsequent electrolytic cell, extends the service life of the isolation membrane and electrode plate of the electrically driven coupled electrolytic cell, improves production efficiency, and further reduces operating costs.

[0113] 3) The technical effect of setting up the kinetic energy fluctuation mechanism and coupling it with the filter.

[0114] It can be combined with an automatic backflushing mechanism to ensure the filter screen area porosity (flow rate), extend the service life of the filter and the electrolytic cell ion membrane, significantly improve production efficiency, and further reduce costs. Attached Figure Description

[0115] For the sake of simplicity in the drawings, Figures 1 to 6 The structural components employ necessary simplified drawing methods:

[0116] 1) For parts with the same function or the same structure, use the same numbering system, and omit the numbering system for parts in symmetrical or similar positions.

[0117] 2) Based on the drawing habits of chemical process drawings, in equipment assembly drawings that demonstrate process principles, it is permissible to simplify the section lines and outlines of parts as a solid line or a rectangular outline.

[0118] 3) Flange connection methods may be expressed using single-line and / or parallel lines;

[0119] 4) To improve visual reading efficiency, the definition of each component in each figure is marked below the figure number.

[0120] Figure 1 Example of an integrated electric drive coupling and separation device (cooling);

[0121] Figure 2 Example of an integrated electric drive coupling and separation device (heating);

[0122] Figure 3 Electric drive coupled settling inclined plate Figure 2 Enlarged example at point A;

[0123] Figure 4 Example of a discrete electric drive coupling separation device with two independent unit structures;

[0124] Figure 5 Example of a discrete electric drive coupling separation device with three independent unit structures;

[0125] Figure 6 Example of a discrete electric-driven coupled heat exchange unit device. Detailed Implementation

[0126] To explain in detail the technical content, objectives, and effects of the electrolytically coupled solid-liquid separation device for electrolyte refining of the present invention, the following description is based on the treatment results of a wastewater sample with a "high salt content" total salt and solids content.

[0127] Scaled-down simulation and scale-up equivalence assessment

[0128] During laboratory validation, an intermittent unit operation method, a qualitative / quantitative filter paper + surgical mask filtration system, an ultrasonic cleaner as a backflushing and electric drive coupling mode, and an isobaric drip method were used to test the void recovery rate after backflushing, effectively scaling up the industrial process. The discrete measured data obtained in the laboratory were input into the logical algorithm of the "mass transfer, heat transfer, transmission, and chemical reaction (three transfers and one reaction)" equation system in chemical reaction engineering. After scaling up the initial design's heat balance, material balance, and process parameter optimization iterations, it was further extended to a continuous unit operating system and a 10,000-ton-scale industrial operation. This can serve as a preliminary basis for technical and economic feasibility studies, which meets the industry's professional requirements.

[0129] Examples of wastewater treatment in high-salt groups (Total salt content: 38.2%)

[0130] Composition analysis of raw water in wastewater pond, example (rare earth high-salt group)

[0131] The results of on-site sampling and analysis of the wastewater pond at Plant W are shown in Table 1.

[0132] Table 1. Composition of raw water from the high-salinity wastewater pond at Plant W

[0133]

[0134] Selection and combination of process systems, example (rare earth high-salt group)

[0135] As shown in Table 1, the total salt and solid content of the raw water in the high-salt wastewater pond is as high as 38.2%. To ensure the treatment effect, three isolated unit systems were selected and operated in series in an electrolytically driven coupled solid-liquid separation device for electrolyte refining.

[0136] The electric drive coupling I-stage separation device has the following structure: Figure 1 As shown;

[0137] The electric drive coupling stage II separation device has the following structure: Figure 2 As shown;

[0138] The electric drive coupling three-stage separation device has the following structure: Figure 2 As shown; and

[0139] a) The precipitant composition (a) is selected as DCM-1A (6% pyrophosphate + 84.95% aluminum sulfate + 9% ammonium oxalate + 0.05% ammonium stearate), used in the electrically driven coupling I-stage separation device, with the following composition and proportions, pH 1.5-12;

[0140] b) The precipitant composition (b) is selected as DCM-2A (5% sulfuric acid + 64.9% ammonium phosphate + 30% ammonium oxalate + 0.10% polyacrylamide), used in the electro-driven coupling II-stage separation device, with the following composition and proportions, pH 1.5-11;

[0141] c) The precipitant composition (c) is selected as DCM-3A (8% oxalic acid + 50% ammonium polyphosphate + 42% ammonia equivalent), used in an electrically driven coupled III-stage separation device, with the following composition and proportions, pH 1.5-10;

[0142] Example of an electrically driven coupled I-stage separation device (rare earth high-salt group)

[0143] from Figure 1 It can be seen that the source sewage enters through the high-salinity wastewater inlet pipe 1 and the precipitant composition (a) from the precipitant feed station 3 Enter the mixed reaction zone 5 Spiral tube heat exchanger is used. 13 Cw1 / Ww1 uses methanol as coolant, and an external refrigeration unit freezes the wastewater to -15°C; an electrically driven coupling settling ramp... 21 Using a single-electrode sedimentation ramp, arranged in the filter 18 The bottom, inner bucket 8 The outer periphery is arranged in a radial, multi-layered, concentric circle pattern, with adjacent negative and positive conductive plates alternating, forming an angle of 90° with the horizontal plane. The maximum spacing is less than 25mm, and the minimum spacing is greater than 4mm. The negative conductive plate is made of nickel-plated aluminum, and the positive conductive plate is made of titanium-plated aluminum, controlling the voltage difference between the negative and positive electrodes to be between (1.45~1.55)V. (The last sentence appears to be incomplete and possibly refers to a filter.) 18 The upper surface is located on the outer barrel 9 Four sets of ultrasonic multi-frequency transducers are arranged around the radial two-thirds position. 6 .

[0144] From the precipitant feeding station 3 Different proportions of precipitant composition (a) were added, and the clarified water outlet was measured. 7 The total salt and solids content of the effluent is shown in Table 2.

[0145] Table 2. Relationship between the addition ratio of precipitant composition (a) and the total salt and solid content of the effluent from the separation unit.

[0146]

[0147] As can be seen from Table 2, when the addition ratio of DCM-1A reaches (0.206 to 0.254) times the initial total salt content of the raw water in the high-salt wastewater pond, the total salt content of the effluent drops from 38.2% to a minimum of less than 20%.

[0148] This indicates that the optimal addition ratio of DCM-1A under this operating condition is within the range of (0.20 to 0.25). Although the addition ratio of DCM-1A is very low, the solid-liquid separation effect is significant.

[0149] Based on the "three-transmission-one-reverse" equation system logic algorithm, it is easily extended to the continuous method, achieving more stable and similar technical results. Example of an electrically driven coupled II-stage separation device (rare earth high-salt group).

[0150] like Figure 2 As shown, the structure of the electric drive coupling stage II separation device appears to be different from that of the electric drive coupling stage I separation device, but in fact, the topological components are the same. The only difference is that the volume is larger and the "weight per unit area" of the filter screen is about 40% higher, which can filter out particles larger than about 0.3μm.

[0151] from Figure 2 It can be seen that the source wastewater passes through the electrically driven coupling stage I separation device and then flows through the wastewater inlet pipe. 1 and the precipitant composition (b) from the precipitant feed station 3 Enter the mixed reaction zone 5 Spiral tube heat exchanger is used. 13 Cw2 / Ww2 uses a kinematic viscosity of 3mm. 2 / s Silicone oil is used as a heat carrier, and an external heat source is provided to heat the wastewater from -15℃ to 10℃, automatically achieving a balance between heat supply and demand; For example, Figure 5 As shown, electrically driven coupled settling inclined plate 21 The laboratory scale-down device uses a composite electrode settling plate made from double-sided PCB boards, which is arranged in the filter. 18 The bottom, inner bucket 8 The outer periphery is arranged in a radially multi-layered, concentric circle pattern, making adjacent negative electrode conductive layers 21.3 and positive electrode conductive layer 21.5 Alternating arrangement, with an angle of approximately 50° to the horizontal plane, a maximum spacing of less than 15mm, and a minimum spacing of greater than 4mm; negative electrode conductive layer. 21.3 and positive electrode conductive layer 21.5 The PCB double-sided copper-clad laminate is titanium-plated to control the voltage difference between the negative and positive electrodes within (1.45~1.55)V.

[0152] In the filter 18 The upper surface is located on the outer barrel 9 Four sets of ultrasonic multi-frequency transducers are arranged around the radial two-thirds position. 6 .

[0153] From the precipitant feeding station 3 Different proportions of precipitant compositions (b) were added, and the clarified water outlet was measured. 7 The total salt and solids content of the effluent is shown in Table 3.

[0154] Table 3. Relationship between the addition ratio of precipitant composition (b) and the total salt content of effluent.

[0155]

[0156] As can be seen from Table 3, when the addition ratio of DCM-2A reaches (0.09 to 0.11) times the total salt and solid content at the outlet of the electric drive coupling I-stage separation device, the total water salt and solid content drops from 20.2% to a minimum value below 14.5%.

[0157] This indicates that under these conditions, the optimal addition ratio of DCM-2A is in the range of (0.09 to 0.11). Although the addition ratio of DCM-2A is very low, the solid-liquid separation effect is significant.

[0158] Therefore, it is easy to extend to the continuous method, resulting in more stable and similar technical effects.

[0159] Example of an electrically driven coupled III-stage separation device (rare earth high-salt group)

[0160] The electric drive coupling III-stage separation device has the same external structure and topological requirements as the electric drive coupling II-stage separation device, only requiring a larger volume and a filter screen with a "weight per unit area" that is about 50% higher (which can filter out particles larger than about 0.15μm).

[0161] from Figure 2 It can be seen that after the wastewater passes through the electrically driven coupling stage II separation device, it enters through the wastewater inlet pipe. 1 And the precipitant composition (c) from the precipitant feed station 3 Enter the mixed reaction zone 5 Spiral tube heat exchangers are still used. 13 Cw3 / Ww3 uses a kinematic viscosity of 5mm. 2 / s of silicone oil is used as the heat carrier, and the heat source is provided from the outside to heat the sewage temperature from 10℃ to 20℃, and the heat supply and demand are automatically balanced.

[0162] For example Figure 3 As shown, electrically driven coupled settling inclined plate 21 Composite electrode settling ramps are used and arranged in the filter. 18 The bottom, inner bucket 8 The outer periphery is arranged in a radially multi-layered, concentric circle pattern, making adjacent negative electrode conductive layers 21.3 and positive electrode conductive layer 21.5 Alternating arrangement, with an angle of 60° to the horizontal plane, maximum spacing less than 45mm, minimum spacing greater than 20mm.

[0163] Negative conductive layer 21.3 and positive electrode conductive layer 21.5 Fiberglass insulation layer 21.4 Double-sided carbon fiber mesh is applied as the negative electrode conductive layer. 21.3 and positive electrode conductive layer 21.5The pore size of the carbon fiber mesh is in the range of 1000 to 2000 mesh, and the voltage difference between the negative and positive electrodes is controlled to be between (1.49 to 1.59) V.

[0164] In the filter 18 The upper surface is located on the outer barrel 9 Four sets of ultrasonic multi-frequency transducers are arranged around the radial two-thirds position. 6 .

[0165] From the precipitant feeding station 3 Different proportions of precipitant composition (c) were added, and the clarified water outlet was measured. 7 The total salt and solids content of the effluent is shown in Table 3.

[0166] As can be seen from Table 3, when the DCM-3A addition ratio reaches the level of the electric drive coupling I separation device... 112 When the total salt content in the exported water was (1.3 to 1.4) times that of the total salt content, the total salt content in the water only dropped from 14.5% to a minimum of below 11.4%.

[0167] Table 3. Relationship between the addition ratio of precipitant composition (c) and the total salt content of effluent.

[0168]

[0169] This indicates that under this condition, the optimal addition amount of DCM-3A is when the addition ratio increases to the range of (1.3 to 1.4). Although the addition ratio of DCM-3A is relatively high, the decrease in total salt content is not significant, indicating that the precipitation, adsorption, and complexation processes of chemical reaction formulas (1) and (2) have been completed and are close to their limits.

[0170] After the wastewater is treated by the electric drive coupling stages I to III, the contents of various limiting ions and groups are below those in Table 4. Although this meets the technical requirements of the electric drive coupling electrolyzer, the organic matter content is still close to 0.583% (far higher than 0.03%). Therefore, it needs to enter the electric drive coupling catalytic oxidation decomposition unit (which is not part of the process mission of this unit) to oxidize and decompose the organic matter into inorganic matter to the maximum extent.

[0171] Table 4. Content of restricted ions and radicals after the electro-coupled III-stage separation unit.

[0172]

[0173] Technical effects of the embodiments

[0174] By selecting one or more combinations of integrated electric drive coupling separation devices, discrete electric drive coupling separation devices, and specific process flows or procedures, and combining them with a precipitant composition, micro- and nano-scale particles can be separated with high efficiency, which is unattainable by existing technologies. Specifically:

[0175] 1) The content of restricted ions and groups of various metals can be reduced to below [0.0028%], which can meet the technical requirements of electrolytic cells;

[0176] 2) Through the filtration of stages I to II to III, the removal rate of micro-nano scale solid particles can reach 99.99%.

Claims

1. An electro-driven coupled solid-liquid separation device for electrolyte refining, characterized in that... Comprising: An integrated electric drive coupling and separation device, a discrete electric drive coupling and separation device, one or more combinations of specific process flows or processes; Wherein, the electric drive coupling further includes At least one of a positive and negative electrode mechanism capable of applying a constant voltage or an oscillating voltage and a kinetic energy fluctuation mechanism is coupled with at least one of a material separation device and a chemical reaction device, so that at least one function of material migration, diffusion, volatilization, and chemical reaction produces a synergistic effect; The electrode mechanism further includes one or more combinations of a functionally electric drive coupling settling inclined plate, an electric drive coupling catalytic electrode plate, and a flow-through electric drive coupling catalytic electrode plate; The kinetic energy fluctuation mechanism further includes one or more combinations of an ultrasonic multi-frequency transducer and a mechanical vibrator; The separation device further includes one or more combinations of a solid-liquid separation device or a solid-liquid separation interface, a gas-liquid separation device or a gas-liquid separation interface, a gas-solid separation device or a gas-solid separation interface, and a filter or a filter interface; The chemical reaction device further includes one or more combinations of a mixing metathesis device, a crystallization device and / or a dissolution device, a tank-type reaction device, a tubular reaction device, and a tower-type reaction device; Wherein, the integrated electric drive coupling and separation device further includes A coaxial differential power mechanism, an outer transmission shaft, a kinetic energy fluctuation mechanism or preferably an ultrasonic multi-frequency transducer, a mixing reaction barrel (inner barrel), a sedimentation clarification barrel (outer barrel), an inner transmission mud rake, a heat exchanger, a stirring paddle, a filter, and an electric drive coupling settling inclined plate; The coaxial differential power mechanism is fixed at the top of the inner barrel on or near its central axis. The inner barrel is located in the upper half of the outer barrel, and their axes coincide or are eccentric. The inner drive rake extends to the bottom of the outer barrel, and its shaft is connected to the coaxial differential power mechanism. The outer drive shaft is located in the central area of ​​the inner barrel and is securely connected to the agitator. The heat exchanger is located in the space between the bottom of the horn diffuser and the upper part of the inner drive rake and is arranged around the inner shaft of the coaxial differential power mechanism. The filter is located in the outer barrel. 9 The shoulder is fastened to the overflow trough weir, and at least one set of kinetic energy fluctuation mechanism or preferably ultrasonic multi-frequency transducer is arranged around the upper or lower plane of the filter at a position of one-half to two-thirds of the radial direction of the outer barrel. The electric drive coupling settling inclined plate is arranged below the filter or upstream of the filter, and in the divergent direction around the periphery of the inner barrel, and the negative and positive electrodes of adjacent conductive layers are alternately arranged in any one or a combination of ways such as parallel layers, a similar mosquito coil drum type, a multi-layer scale type, a concentric circle type, and a "return" shape; the angle between the electric drive coupling settling inclined plate and the horizontal plane is between 45° and 90°; the maximum distance between the electric drive coupling settling inclined plates is maintained between one-fiftieth and one-half of the shorter length of adjacent two electric drive coupling settling inclined plates; Wherein, the discrete electric drive coupling and separation device further includes Transforming the topological structure elements of the integrated electric drive coupling and separation device into two and / or more independent unit structures or unit isolated device systems or unit combined device systems.

2. The electrically driven coupled solid-liquid separation device according to claim 1, characterized in that... The specific process flow or process includes: high-salt wastewater enters through the high-salt wastewater inlet pipe, and a precipitant composition enters through the precipitant feeding station, and the two enter the mixing reaction zone of the mixing reaction barrel (inner barrel) synchronously, successively, or continuously; the coaxial differential power mechanism drives the outer transmission shaft to drive the outermost edge of the stirring paddle to rotate at a linear velocity of (0.5 - 2.0) m / s, and controls the residence time of the suspension in the mixing reaction zone to be (5 - 20) min, so that the precipitant composition is mixed evenly with the saline wastewater, and at least one reaction of chemical reaction formulas (1) to chemical reaction formula (4) occurs with the ions soluble in the high-salt wastewater; In the above chemical reaction formulas (1) to (4), M n+ —Metal ions of soluble salts with a valence of n≥2, such as Ca 2+ Mg 2+ The specific types and contents of metal ions depend on the mineral source, process, and raw material composition of the on-site factory. A m- —The anion group of a soluble salt with a valence m ≤ -2, for example The specific types and contents of the anions are selectively added based on the mineral resources, processes, and raw material composition of the factory on site. Cl - —Chloride ions (for example); OH - —Hydroxylene (for example); H + —Hydrogen ions (for example); —Ammonium ion (for example); —Potassium ions or sodium ions (for example); m - valence or coordination coefficient; n - valence or coordination coefficient.

3. The electrically driven coupled solid-liquid separation device according to claim 1, characterized in that... The assembly includes: two or more processes, mechanisms, devices, and systems with their own independent functions, which are superimposed, combined, arranged, or connected to form a relatively complex process, mechanism, device, or system by means of pipelines and / or valves and / or electromechanical control mechanisms.

4. The electric drive coupling device system according to claim 1, characterized in that... The electrically driven coupled settling plate includes at least one or a combination of two types of single-electrode settling plates and composite-electrode settling plates. The single electrode settling inclined plate also includes On the same plate, there is a single negative electrode conductive plate or a single positive electrode conductive plate, and the negative electrode conductive plate and the positive electrode conductive plate can be relatively displaced and / or fixed; the negative electrode conductive plate and the positive electrode conductive plate of each single electrode settling inclined plate are respectively connected to the constant voltage or oscillating waveform electric drive cathode power supply and electric drive anode power supply. The composite electrode settling inclined plate also includes Solid electrically driven coupled settling ramp, permeable or air-permeable electrically driven coupled settling ramp (the sandwich layer is hollow or has pipes), A combination of at least one or more of the following (which can be connected to backwash water or compressed air); On the top and bottom surfaces of the same integral board, a negative conductive layer and a positive conductive layer are respectively made, and an insulating layer is placed between the negative and positive electrodes to form a three-layer fixed structure like a sandwich cookie. The negative electrode conductive layer and the positive electrode conductive layer further include One or more of the following: carbon fiber cloth, carbon fiber mesh, carbon fiber nonwoven fabric, conductive coating, metal foil layer, metal plate or coated metal plate, metal mesh or coated metal mesh. Wherein, the insulating layer 21.4 Also includes A combination of one or more of the following: rubber, plastic, fiberglass, PCB, glass fiber reinforced rubber and plastic, ceramics, radiation cross-linked rubber and plastic sheets, air, or liquid; The metal further includes any one or a combination of aluminum, iron, copper, nickel, titanium, and silver. The coating further includes depositing an inert metal, such as any one or a combination of copper, nickel, titanium, silver, gold, ruthenium, rhodium, palladium, and platinum, on the outer surface of the metal. The carbon fiber mesh further includes mesh sizes ranging from 30 mesh to 2000 mesh; The carbon fiber nonwoven fabric further includes those with an equivalent pore size in the range of 30 mesh to 2000 mesh.

5. The electric drive coupling device system according to claim 1, characterized in that... The ultrasonic multi-frequency transducer includes: one or more of the following: an integrated ultrasonic multi-frequency transducer and a discrete ultrasonic multi-frequency transducer, and the center frequency is distributed in at least two of the four frequency bands (20-51) Hz, (100-600) Hz, (10-31) kHz, and (1-3.5) MHz, and at least one center frequency is alternately executed. The integrated ultrasonic multi-frequency transducer also includes In terms of external structure, they are superimposed, combined, or integrated into a single component; The discrete ultrasonic multi-frequency transducer also includes In terms of external structure, it uses discrete components or assemblies that work together.

6. The electric drive coupling device system according to claim 1, characterized in that... The filter includes one or more of the following: a barrel filter element, a tubular filter element, a bag filter, a flat filter, and a corrugated pleated filter. The filter element and filter screen are a combination of one or more of the following: PP fiber cloth, PE fiber cloth, PTFE fiber cloth, PVDF fiber cloth, glass fiber cloth, foam ceramic, foam metal, metal wire mesh, and radiation cross-linked rubber and plastic fiber mesh.

7. The electrically driven coupled solid-liquid separation device according to claim 2, characterized in that... The precipitant composition includes any one or more of the following: acidic substances, alkaline substances, and salt substances; based on the fluctuations and differences in the salinity, pH, and temperature of the wastewater at the process site of the electric-driven coupling stage I, electric-driven coupling stage II, and electric-driven coupling stage III treatments, the ratio of the total amount of precipitant composition added to the total salt content of the wastewater is dynamically adjusted and controlled to be between (0.03 and 1.73) times, and the pH value is between 1.5 and 12. The acidic substances also include Chlorine gas or chlorine water, hydrochloric acid, sulfuric acid, phosphoric acid, pyrophosphate, polyphosphoric acid, oxalic acid, citric acid, carbon dioxide gas or carbonic acid, polyacrylic acid, C2-C 18 One or more combinations of carboxylic acids and their diluents; The alkaline substances also include Ammonia gas or ammonia water, sodium hydroxide, potassium hydroxide, calcium hydroxide, magnesium hydroxide, polyacrylamide, urea, biuret, triuret, or a combination thereof, and their dilutions. The salt substances also include Aluminum chloride, polyaluminum chloride, aluminum sulfate, ammonium sulfate, sodium sulfate, ammonium phosphate, ammonium polyphosphate, sodium phosphate, sodium metaphosphate, ammonium oxalate, sodium oxalate, ammonium citrate, sodium citrate, ammonium carbonate, sodium carbonate, ammonium bicarbonate, sodium bicarbonate, C2~C 18 Combinations of one or more of ammonium carboxylate and / or sodium salts, and their dilutions. The single electrode settling inclined plate also includes On a single plate, either a single negative electrode conductive plate or a single positive electrode conductive plate, the negative electrode conductive plate and the positive electrode conductive plate can be relatively displaced and / or fixed. The composite electrode settling inclined plate also includes A negative conductive layer and a positive conductive layer are attached to the top and bottom surfaces of the same integral board, respectively, and an insulating layer is placed between the negative and positive electrodes to form a three-layer fixed structure resembling a sandwich.

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