WO2012028054A1

WO2012028054A1 - Environment friendly technology inert composite electrode plate and preparation method thereof and electrolysis equipment containing the palte

Info

Publication number: WO2012028054A1
Application number: PCT/CN2011/078284
Authority: WO
Inventors: 蒋亚熙; 张定军
Original assignee: Jiang Yaxi; Zhang Dingjun
Priority date: 2010-08-30
Filing date: 2011-08-11
Publication date: 2012-03-08
Also published as: CN101985758B; CN101985758A

Abstract

The invention relates to an environment friendly technology (EFT) inert composite electrode plate and preparation method thereof and electrolysis equipment containing the electrode plate. The electrode plate comprises a multilayer structure of at least one active metal layer on the inner layer and two graphite layers on the two sides of the active metal layer. After using the electrode plate of the invention, the treated sewage can be discharged up to the standard and the service life of the electrode plate is greatly prolonged.

Description

Electrode plate of EFT inert composite electrode and preparation method thereof, electrolysis device including the same

The present invention relates to an electrode plate for an inert composite electrode of an Environmentally Friendly Technology (EFT), particularly an anode plate of an inert composite electrode, a method of preparing the electrode plate, and an application thereof. Background technique

Electrochemical water treatment technology is called "environmentally friendly" technology (EFTJ vironment Fri end ly

The main points of Technology, EFT electrochemical technology are: Electro-flocculation / electrical float / co-precipitation technology, is the reaction principle of electrochemical oxidation reduction, electrochemical method to control pollution. A certain voltage of direct current is passed through the electrolytic cell, and the waste water is passed through the electrolytic cell, so that the anion of the electrolyte in the waste water is moved to the anode, and the electron is lost at the anode, and the cation is transferred to the cathode, and the electron is reduced at the cathode. . By this reaction, the contaminated component is formed into a water-insoluble precipitate, and a gas law is generated to escape from the water to purify the wastewater. Electrochemical treatment of sewage is one-third of the operating cost of general chemical methods, physical methods, etc., and the process is simple, easy to operate, and the infrastructure is small, and the treated sewage can be stably discharged to the standard for a long time. The electrochemical method for treating sewage has the advantages of no need to add chemicals such as oxidants and flocculants, and has the advantages of small volume, small floor space, and simple and flexible operation. However, electrochemical methods have always had shortcomings such as high energy consumption (using electrical equipment running for a long period of time, generally more than 3 hours), high cost (fast consumption of electrode plates, main problems are passivation, active metal electrode plates), etc. Limits the application of electrochemical methods in the field of wastewater treatment

Under the action of the applied voltage, a large amount of cations (such as Fe, Al ^3+, etc.) are generated by the use of a soluble anode, and the wastewater is coagulated and precipitated. This method is called electrocoagulation. Electrocoagulation is often accompanied by air flotation, and hydrogen is reduced at the cathode, so there is also a method called electrocoagulation. The electrode reaction is as follows:

Anode: Fe — 2e → Fe ²⁺ or Al — 3e → Al ³⁺

Cathode: 2H ⁺ - 2e f or 0 ten ne ― Re The use of electrocoagulation and electrical float in several electrochemical treatment wastewater types is relatively mature. Compared to chemical coagulation, electrocoagulation does not require investment in dosing facilities, and material consumption is much less. The drawback is the energy consumption issue.

Iron ions or aluminum ions combine with hydroxide to act as a coacervate. At the same time, a reduction reaction occurs at the cathode, and the evolved hydrogen gas forms extremely small bubbles, and the agglomerates in the wastewater are floated on the surface of the liquid of the electrolytic cell. Electrocoagulation as wastewater treatment An effective means has been applied very early, but due to its excessive use of aluminum and iron consumables in practical applications, the development and application of electrocoagulation has been limited. At present, the treatment method of wastewater is generally carried out by physical and chemical separation and two-stage treatment. The front section treats three types of water; chromium water, cyanide water and integrated water (copper nickel zinc water). The chrome water is reduced in price by a reducing agent, and the cyanide water is cyanogenated by two-stage oxidation, and the copper-nickel-zinc water directly merges with the first two Yin waters to become integrated water. The latter stage of treatment of integrated water, basically using alkali (caustic soda or lime), polyaluminum chloride (PAC) and organic flocculant (PAM), the specific operation is: adjust the pH of the integrated water to 10-13, alkali concentration Larger, the reaction of the base with the heavy metal is forced to proceed in the direction in which the hydroxide is formed. Since the pH value is 9, the discharge port needs to be neutralized with an acid to lower the pH to below 9. This is a traditional process and has many shortcomings. For example, pre-treatment: the division of three sewages does not meet the actual production. Chromium water is mainly chromium, and cyanide water

Λ is the main, copper, nickel and zinc Wanghe water is mostly composed of 3 elements. These realities are found in the practice of wastewater treatment, which is the case for almost all corporate wastewater. Due to the presence of various contaminants in the sewage treated in the second stage, it is difficult to discharge the terminal water to the standard with a simple chemical method. It is impossible to achieve the treatment requirements of the reverse osmosis membrane in the previous stage treatment, and the processing cost is high, and the discharge is not up to standard. The latter stage treatment has become the direction and goal pursued by various sewage treatment enterprises. Various filtration facilities are mixed with fish, and the emission concentration standards of electroplating enterprises are different.

In the process of electrochemical treatment of sewage, after the electrolysis for a period of time, the anode will be passivated, the scale will be fouled 13⁄41, and an oxide protective film is adhered to the surface of the electrode during passivation, which means that the anode is dissolved and stopped. Sewage can not meet the standard discharge, and the electrode material and electric energy consumption are large, and the sewage treatment operation cost is high. These problems have plagued the application of electrochemical methods in the production of sewage treatment.

At the same time, most of the soluble electrodes widely used at home and abroad are iron plates and aluminum plates, as a sulphide for treating sewage, but the electrode plate material consumption is too high, easy to foul, easy to age, short service life (about 30 days), increase The cost of wastewater treatment. Summary of the invention

The inventors succeeded in researching an electrode plate used as an inert composite electrode on the basis of extensive experimental research. According to the technical solution of the present invention, it is implemented as follows;

(D) An electrode plate comprising a multilayer structure composed of at least an active metal layer of an inner layer and a three-layer structure of a graphite layer on both sides of the active metal.

(2) The electrode plate according to (1), wherein on one side of the multilayer structure, an insulating material layer and a graphite layer are sequentially disposed between the active metal and the graphite layer, the side multilayer structure being The outward inward order is a graphite layer, an insulating layer, a graphite layer, and an active metal layer. (3) The electrode plate according to (2), wherein an insulating material layer and a graphite layer are sequentially disposed between the active metal and the graphite layer on the other side, that is, the other side multilayer structure is inwardly The graphite layer, the insulating layer, the graphite layer and the active metal layer are in this order.

(4) The electrode plate according to (1), wherein on one side of the multilayer structure, an active metal layer and an insulating material layer are further disposed between the graphite layer and the active metal, and the side multilayer crucible From the outside to the inside are a graphite layer, an active metal layer, an insulating layer and an active metal layer.

(5) The electrode plate according to (4), wherein on the other side of the multilayer structure, an active metal layer and an insulating material layer are further provided between the graphite layer and the active metal, the side multilayer structure From the outside to the inside are a graphite layer, an active metal layer, an insulating material layer and an active metal layer.

(6) The electrode plate according to (1), characterized in that the graphite outer layer on the one side is further provided with an active metal layer ''

(7) The electrode plate according to any one of (1), wherein the insulating material layer is a glass steel layer.

(8) The electrode plate according to any one of (1), wherein the electrode plate is used as an anode plate.

(9) An electrolysis apparatus characterized by comprising the electrode plate of any one of (1) to (8).

(10) The electrolysis apparatus according to (9), characterized in that it further comprises a cathode plate, and an optional transition plate.

(11) The electrolysis apparatus according to (9) or (10), characterized in that the electrolysis apparatus comprises at least one anode plate of any one of (1) to (8), a cathode plate, and a cathode plate and an anode plate. At least two, more preferably three, transition plates between.

According to the above technical solution, the preferred technical solution of the present invention is implemented as follows:

An electrode plate, characterized in that the electrode plate is composed of at least seven layers, which in turn comprises a graphite layer, an insulating material layer, a graphite layer, an active metal layer, a graphite layer, an insulating material layer, and a graphite layer. The innermost layer is an active metal layer, and at least three layers, namely a graphite layer, an insulating material layer and a graphite layer, are respectively added on both sides of the active metal layer. The active metal layer described therein may be an aluminum or iron layer. The electrode plate can be used as a Japanese pole.

According to the present invention, a preferred electrode plate is composed of a graphite layer, a glass steel layer, a graphite layer, an active metal layer, a graphite layer, a glass steel layer, and a graphite layer.

According to the present invention, the most preferred electrode assembly consists of a graphite layer, a glass steel layer, a graphite layer, an aluminum layer, a graphite layer, a glass steel layer, and a graphite layer.

In the anode plate of the present invention, FRP can be selected as an inert material to increase the adhesion to the active metal layer. The multilayer combination for increasing the FRP may be a graphite layer, a FRP layer, a graphite layer, an active metal layer, a graphite layer, a glass steel layer, and a graphite layer.

An electrolytic cell according to the present invention includes the above transition plate, and further includes an anode plate and a cathode plate. An electrolysis apparatus according to the present invention, comprising the above electrode plate, further comprising an anode plate, preferably comprising a transition plate. In the present invention, the cathode plate used may be a conventional cathode plate, but it is preferable to use the cathode plate of the invention named "EFT inert composite electrode and its preparation method, which is submitted by the applicant on the same day, and contains the electrolysis of the cathode plate. Patent Application, the entire disclosure of which is incorporated herein by reference.

According to the technical solution of the present invention, the cathode plate comprises a multilayer structure composed of at least an intermediate layer of the inner layer and a three-layer structure of the graphite layer on both sides of the intermediate layer. The intermediate layer is an active metal layer, a stainless steel layer or a carbon steel layer, wherein the active metal layer is an iron layer or an aluminum layer.

According to the foregoing cathode plate, an active metal layer and a graphite layer are sequentially provided from the inside to the outside on the outside of the graphite layer on one side of the multilayer structure.

According to the foregoing cathode plate, wherein the outer layer of graphite on the other side of the multilayer structure is provided with an active metal layer and a graphite layer from the inside to the outside.

According to the foregoing cathode plate, wherein on one side or both sides of the multilayer structure, an insulating material layer, a graphite layer, an active metal layer and a graphite layer are further provided from the inside to the outside on the outside of the graphite layer.

According to the foregoing cathode plate, it is characterized in that an insulating layer is further provided between the graphite layer and the intermediate layer on one or both sides.

According to a preferred embodiment of the invention, the layer of insulating material is a layer of glass steel. More preferably, the glass reinforced plastic layer is a composite layer of epoxy resin and glass fiber.

According to a more preferred technical solution of the present invention, it is realized by a cathode plate characterized in that the electrode plate is composed of at least three layers, which in turn comprises a graphite layer, an active metal layer and a graphite layer, The active metal is iron or aluminum.

According to the invention, the cathode plate is composed of at least three layers of a structure, which in turn consists of a graphite layer, a carbon steel layer, and a graphite layer.

According to the present invention, a preferred cathode plate is composed of at least seven layers including a graphite layer, an active metal layer, a graphite layer, a glass steel layer, a graphite layer, an active metal layer, and a graphite layer.

According to the present invention, a preferred cathode plate is composed of at least seven layers including a graphite layer, a carbon steel layer, a graphite layer, a glass steel layer, a graphite layer, a carbon steel layer, and a graphite layer.

According to another preferred embodiment of the present invention, the cathode plate is composed of at least five layers of a structure including, in order, a graphite layer, an active metal layer, a graphite layer, an active metal layer, and a graphite layer.

According to the present invention, it is preferred to carry out the blast treatment of the active metal layer, and if a plurality of active metals are contained, it is possible to selectively spur the partial active metal layer. The purpose of the sprint is to make the active metal layer adhere better to the outer layer without adding other binders. For the transition plate used in the present invention, reference may be made to the patent application filed by the same applicant on the same day, entitled "EFT inert composite electrode transition plate and its preparation method, electrolysis device containing the transition plate", which is incorporated herein by reference in its entirety. reference.

The basic structure of the transition board is as follows -

An electrode plate comprising at least a four-layer structure comprising a graphite layer, an intermediate layer, a graphite layer, and a four-layer structure of the outer layer.

According to the foregoing electrode plate, the intermediate layer and the outer layer are respectively an active metal layer, a stainless steel layer or a carbon steel layer.

According to the foregoing electrode plate, the active metal layer is an iron layer or an aluminum layer.

Preferably, an active metal layer, a stainless steel layer or a carbon steel layer, and optionally a graphite layer are further included outside the graphite layer on one side of the multilayer structure.

Preferably, the outer layer also includes a layer of active metal, a layer of stainless steel or a layer of carbon steel, and optionally a layer of graphite.

According to the foregoing electrode plate, wherein outside the graphite layer on one side of the multilayer structure, from the inside to the outside, an insulating layer, a graphite layer, an active metal layer, a graphite layer, optionally a layer of insulating material, and optionally Composition of graphite layers.

The preferred transition plate is realized by a 9-layer structure consisting of a graphite layer, a washed active metal layer, a graphite layer, a FRP layer, a graphite layer, an active metal layer, a graphite layer, a FRP layer, and a graphite layer;

9 layers of graphite layer, carbon steel layer, graphite layer, glass steel layer, graphite layer, aluminum layer, graphite layer, glass steel layer, graphite layer;

According to a preferred embodiment of the present invention, the transition plate is composed of at least a four-layer structure in which a graphite layer, a washed active metal layer, a graphite layer, and an active metal layer are sequentially formed. The active metal layer described therein is also replaced by a carbon steel layer or a stainless steel layer.

According to a preferred embodiment of the present invention, the transition plate is composed of at least four layers including a graphite layer, a carbon steel plate layer, a graphite layer, and an aluminum layer.

According to a preferred embodiment of the present invention, the transition plate is composed of at least a graphite layer, a spurted active metal layer, a graphite layer, an active metal layer and a graphite layer, wherein the active metal layer can also be carbon. Replacement with steel or stainless steel.

According to the above electrode plate, it is preferred to carry out the rinsing treatment on the active metal layer.

The insulating material is preferably a glass steel layer, preferably a glass steel layer composed of an epoxy resin and a glass fiber composite. Although the transition plate of the present invention is not directly connected to the power supply, in the electrolytic cell, the transition plate of the present invention The body is actually equivalent to the characteristics of both the anode plate and the cathode plate.

In the electrolysis apparatus of the present invention, the use of the transition plate is capable of reducing current and enhancing wastewater treatment capacity. When there is no transition plate in the electrolytic cell composed of the anode plate and the cathode plate, the current of the single pole wiring method is greater than 1000A under the same water quality, but when there is a transition plate, the current of the multi-pole wiring method of the same water quality does not exceed 800 A. Preferably no more than 600 A, more preferably no more than 500 A, and most preferably no more than 400 A.

When a DC power source is employed, when a transition plate is used between the cathode plate and the anode plate, at least two transition plates are preferred, and more preferably at least three transition plates are preferred. If high voltage pulses and high frequency pulsed power supplies are used, the transition plate can be unlimited.

In the present invention, the reason why the transition plate is used to reduce the current is that the transition plate can also serve as an electrode in the electrolysis device, and the two sides of a transition plate can serve as an anode and a cathode, respectively, so that both sides of the transition plate can be set. different. Under the condition of DC power supply, since the transition plate is not in communication with the current, it basically reduces the current of the electrolysis device and greatly reduces the risk.

The reason why graphite is used on the outer surface of the electrode plate is that graphite is not easily peeled off and is not easily eroded. Therefore, after the graphite is added, passivation is not generated on the surface layer of the electrode, thereby effectively protecting the service life of the electrode plate; The anode and cathode set a stable distribution of the current density of the electrolytic cell between the distances, and the treated wastewater can reach the standard discharge and can be stable for a long time.

Because graphite is an inert material, it has unique acid resistance, alkali resistance, high temperature resistance and superior electrical conductivity. It is solved by a reasonable technology and bonding with FRP and active metal to form an EFT inert composite electrode. In the process of technical wastewater treatment, the electrode plate is easy to be contaminated, easy to scale, perishable, easy to passivate, short service life, high running cost, etc.; and can control the orderly release of the anode plate of the electrode plate in the setting range, the negative plate It can be used for a long time, and heavy metals can be recycled. The sewage treatment effect is stable for a long time.

The graphite layer may be selected from graphite of various raw materials, preferably expanded graphite, more preferably superior expanded graphite having a content of more than 99.8%.

For economic considerations of water treatment, the electrode plates are preferably iron or aluminum plates.

In order to make the adhesion between the electrode plate for performing the electrolytic reaction and the adjacent layer stronger, it is preferable to spur the electrode of the electrolytic reaction. If the electrode plate is multi-layered, it is optional to spur the partial electrode plate. There is no need to add other adhesives in the electrode plate treated with the thorn.

In order to make the wastewater treatment more complete, the anode plate and the transition plate may be perforated, and the shape of the holes may be groove-shaped, circular, palm-shaped, square, or the like, preferably elliptical and circular, more preferably elliptical. Preferably, it contains 1 () to 40 pores, preferably 15 to 30 pores, more preferably 20 to 24 pores. The pore size is determined by the amount of flocculation required to treat the wastewater.

A preferred embodiment of the EFT composite electrode sewage electrolysis apparatus of the present invention comprises at least two, preferably at least three, sequentially placed transition plates of the present invention, and at least one anode plate and one cathode plate. According to the present invention, the preparation process of the anode plate includes a conductive rubber pressing step. Specifically, the following steps are included; a. Preparation of graphite layer

至优选为0. 6-L 5mm, More preferably 0. Preferably, the high-quality expanded graphite worms having a content of more than 99.8% are pressed into 0.4. 2 · 2 i, preferably 0. 6-L 5mm, more preferably 0. 8-1. 2 mm, most preferably 0. 9-lmm thick composite plate.

The thickness of the flat plate is not particularly required, and is set to the above range in consideration of cost and the like.

b. Preparation of optionally inert material layers

The composite plate having a thickness of 0. 3 - 3 mm, more preferably 0. 6 - L 5 mm, more preferably 0. 8 - 1 mm is used.

c Preparation of active metal layer

The active metal material is 0. 2-5 mm, more preferably 0. 4-3 mm, still more preferably 0. 6-2 mm, still more preferably 0. 8-1. 5 mm, most preferably 0.9-lmm thick active metal material. Selecting the ground for sprint processing>

d. Preparation of anode plate

The prepared graphite layer, the optional spurted active metal aluminum layer and the inert material layer are prepared, and according to the multilayer structure of the anode plate, the sequential discharge is bonded and flattened with a conductive adhesive, and then the nylon bolt is used for fixing and flattening, thereby obtaining the invention. The anode plate.

Preferably, in step d, the first composite material or the second composite material comprising the active metal, carbon steel or stainless steel layer is respectively formed according to the number of active metal, carbon steel or stainless steel layers, and then according to the multilayer structure The requirements for sequential discharge produce the required electrode plates.

According to the present invention, the order of the above steps 3, b, and c is not particularly required, and may be b, c, a or c, b, a, and the like.

According to the present invention, the raw materials of the above respective layers can be obtained commercially or by a process conventional in the art to obtain a ply having a thickness, a length, and a width.

According to the present invention, the preparation process of the electrolysis apparatus of the EFT inert composite electrode is achieved by: using EFT inert composite electrode to form 20-40, preferably 24 to 36, more preferably 26 to 30 pitches.

80 240mra, preferably 100 200, more preferably 120 160 electrolytic cell, the electrode wiring method is multi-pole wiring method, preferably (+ 0 0 - 0 0 0 0 - ), that is, anode plate, transition plate, transition plate, cathode plate, The transition plate and the transition plate are repeatedly arranged in sequence, or preferably (+ 0 0 0 - 0 0 0 + 0 0 0 ), that is, an anode plate, a transition plate, a transition plate, a transition plate, a cathode plate, a transition plate, a transition plate, The transition board, repeating the wiring in turn. External power supply 22 (W, variable voltage is 12V 24V. 36V, current density depends on sewage quality. Electrolytic tank size; 4000-6000 legs long, preferably 4200-5600 legs, more preferably 4500-800 legs; width 800-2000 legs , preferred

1000 15001 ; high 1000 2400 mm, preferably 1200 180 (1⁄2η.) 8 10 tons of electroplating wastewater can be processed per hour.

Plate size: length 800-2000 [n, preferably 1000-1100 3⁄4 800-2000 ιηιη, preferably 1000-1100 mm thick 1. 5 miii to 10 miii, preferably 2-8 mm, more preferably 4-6

In the preferred embodiment of the electrolysis device according to the invention, the initial current is 260 - «ΟΑ, preferably 275 - 360 Α, more preferably 285 - 400 Α; the current after 10 minutes is 240 - 386 Α, preferably 256 - 300 Α More preferably, it is 275-276 Α; the current after 45 minutes is 180 320 Α, more preferably 206-295 Α, more preferably 262 270 Α; the current after 60 minutes is 150 300 Α, preferably 175-265 A, more preferably 230-250 Α

According to a preferred embodiment, the initial current is 275 Α 10 minutes 256 Α·, 45 minutes 206 Α 60 minutes 175 Α according to another embodiment, the starting current is 385 Α 10 minutes 275 Α 45 minutes 262 Α 60 minutes 230 Α according to another embodiment, the initiation Current 360 Α 10 minutes 276 Α 45 minutes 270 Α 60 minutes 265 Α ₀ According to another embodiment, the initial current is 420 Α 10 minutes 386 Α 45 minutes 295 Α 60 minutes 265 Α The wastewater treatment process of the present invention is to pass sewage, such as electroplating sewage Into the sewage treatment equipment (EFT) containing the electrode plate of the invention, and then adjusted by an EFT-pH automatic adjustment machine, and then the adjusted sewage is separately introduced into a plurality of side-by-side mud-water separation tanks, after separation The clean water is directly passed into the clean water collection tank, and the impurities are passed into the sludge collection tank. For further processing, the clean water obtained in the clean water collection tank is passed to the carbon sand filter tower for secondary treatment, and then the treated wastewater is reused or discharged into the clean water bubble for use.

Under the action of the applied voltage, the EFT inert composite electrode processed by the invention is used as the positive and negative electrode material in the wastewater treatment, and the treated wastewater can be stably stabilized for a long time, can meet the standard discharge, and the running cost is very low; Chemical technology deals with the problem of easy aging and high energy consumption of electrode plates in the field of wastewater. It has created a new material technology for the treatment of domestic sewage and industrial sewage. This revolutionary success will give electrochemical technology an active role in wastewater treatment and will contribute to water conservation and environmental protection.

After the electrode plate of the present invention is processed and composited into an EFT inert composite electrode, the service life of 150 tons of electroplating wastewater per day is more than 400 days, which greatly reduces the cost of wastewater treatment.

The ffi EFT inert composite electrode is used as a technical feature for treating electric flocculation in sewage, and it can recover valuable materials in sewage treatment. It can not only treat a single Cr ( VI ) -containing wastewater, but also ferrite and coprecipitation can handle Cr ( VI ) , Cr ³ \ Cu ² \ Ni ²⁺ Zn ^z Cd ² \ Pb ^{2+ ,} etc . The comprehensive electroplating wastewater with heavy metal ions does not need to be diverted, and the treatment is up to one standard, which greatly simplifies the treatment process and the water quality after treatment is stable. Since the back end of the electroflocculation process also has a lime milk coagulation sedimentation unit, this further ensures the removal of heavy metal ions. For example, when treating electroplating or electrolyzing wastewater, more than 30 kinds of precious metals such as chromium or copper can be recovered at the same time; in the treatment of landfill leachate, It can remove heavy metals, remove salts, sterilize, and retain nitrogen, phosphorus, potassium and organic matter, making it an organic-inorganic composite liquid fertilizer, etc.; using EFT inert composite electrode technology to treat sewage such as COD, B0D, NH4~, Escherichia coli The removal rate of suspended solids, heavy metals, etc. is as high as 99%. Therefore, the EFT inert composite electrode technology has emerged, making the sewage treatment resource a reality, and the traditional concept of sewage treatment has a new development.

After the EFT inert composite electrode is made into an electrolytic cell and equipment, more than 30 kinds of metal ion plexus aqueous solutions are electrodeposited on the cathode EFT inert composite electrode, including precious metals and heavy metals, by treating the electroplating wastewater. The treatment rate of heavy metals was almost 100%, and the treatment rate of non-metals reached 96.5%.

EFT inert composite electrode is made into electrolytic cell and equipment, which can be widely used in the treatment of various electroplating, dyes, pigments, coatings, pesticides, medicines, veterinary drugs, explosives and other production wastewater; refinery wastewater, oil field wastewater and other fine chemical wastewater, with Turbidity and decolorization, reducing C0D, BOD, especially for decolorization and removal of heavy metals; especially in the car wash yard, the equipment can effectively remove suspended solids, various colloids, various bacteria, and dispersed oil in the car wash wastewater. , emulsified oil, removes odor in water, and the water quality of wastewater treatment meets the water quality standards for domestic miscellaneous water. DRAWINGS

Ίί Figure 1: Schematic structure of the anode plate of the present invention

^ Figure 2 _: Schematic diagram of the cross-section of the anode plate of Figure 1.

^ Figure 3: Anode plate structure prepared according to the method of the present invention

Ιί图4: Schematic diagram of EFT sewage treatment electrolyzer

Ft Figure 5: EFT wastewater treatment electrochemical process flow chart

The invention is further described in the following with reference to the embodiments. It is to be understood that the following embodiments are not intended to limit the scope of the invention, and any modifications made on the basis of the invention are within the scope of the invention. Example 1. An anode plate consisting of a graphite layer, a glass steel layer, a graphite layer, an active metal layer, a graphite layer, a glass steel layer, and a graphite layer.

First step; preparation of graphite layer

The content is 99. More than 8% of the high-quality expanded II graphite worms were pressed into a composite plate of 0.5 mm and 0.8 mm thickness.

Step 2: Preparation of FRP layer

5毫米厚度的复合平板片。 Two pieces of high-quality epoxy t-wet and glass fiber into a composite thickness of 0. 5 ma. Third step; preparation of active metal layer

Use an aluminum plate with a thickness of i.

The fourth step: preparation of the anode plate

A 0, 5 mm graphite layer, a 0 5 mm glass steel layer, and a 0.8 mm graphite layer were sequentially laminated with a conductive adhesive to obtain two identical outer composite materials, and then the two composite materials were separately placed. On both sides of the active metal aluminum layer, a 0.8 mm graphite layer is adjacent to the aluminum layer, and then bonded with a conductive adhesive to obtain an anode plate of the present invention. Example 2 K-plate consists of a graphite layer, a FRP layer, a graphite layer, an active metal layer, a 3⁄4 ink layer, a FRP layer, and a graphite layer.

First step: Preparation of graphite layer

The high-quality extruded graphite worms with a content of more than 99.8% were pressed into four composite plates of 1 mm thickness.

Step 2: Preparation of FRP layer

The high-quality epoxy resin and glass fiber are used to form two composite plates with a thickness of 0.8 mm.

Step 1: Step: Preparation of active metal layer

Use an aluminum plate with a thickness of 0.8 mm _.

The fourth step: preparation of the anode plate

After the 1 mm graphite layer, the 0.8 mm glass steel layer and the 1 mm graphite layer were sequentially bonded by the 3⁄4 conductive adhesive, two identical outer composite materials were obtained, and then the two composite materials were separately placed. On both sides of the active metal aluminum layer, and then pressure-bonded with a conductive paste, the anode plate of the present invention was obtained. Example 3. The anode plate is composed of a graphite layer, a glass steel layer, a graphite layer, an active metal layer, a graphite layer, a glass steel layer, and a graphite layer.

First 歩: Preparation of graphite layer

The high-quality expanded graphite worms with a content of 99, 8% or more were pressed into four composite plates with a thickness of 0, 6 ram.

Second step; preparation of FRP layer

Step: Preparation of active metal layer

Use an aluminum plate with a thickness of 1. 2 mm.

Fourth 歩: Preparation of anode plate

A 0,6 mm graphite layer, a 0,8 ί glass steel layer, and a 0,6 m graphite layer are sequentially laminated with a conductive adhesive to obtain two identical composite layers, and then the two pieces are obtained. Composite materials are placed on the active metal aluminum layer Both sides are then bonded and flattened with a conductive paste to obtain the anode plate of the present invention. Example 4. The anode plate is composed of a graphite layer, a glass steel layer, a graphite layer, an active metal layer, a graphite layer, a glass steel layer, and a graphite layer.

No. - Preparation of graphite layer

High-quality expanded graphite worms with a content of more than 99.8% were pressed into two composite plates of 1 and 0, 8 mm thickness.

Step 2: Preparation of FRP layer

Use a high-quality epoxy resin and glass fiber to form a composite plate with a thickness of 0.6 mm.

No.: Three: Preparation of active metal layer

An aluminum plate with a thickness of 0.8 m is used.

The fourth step: preparation of the anode plate

A 0, 8 mm graphite layer, a 0.6-legged FRP layer, and a 1 drop graphite layer were sequentially bonded and flattened to obtain two identical outer layer composites, wherein 1 mm of graphite layer and aluminum were obtained. The layers are adjacent, and then the two composite materials are respectively placed on both sides of the active metal aluminum layer, and then bonded with a conductive adhesive to obtain an anode plate of the present invention. Example 5. The anode plate is composed of a graphite layer, a glass steel layer, a graphite layer, an aluminum layer, a graphite layer, a glass steel layer, and a graphite layer.

First step: Preparation of graphite layer

The high-quality expanded graphite worms with a content of more than 99.8% were pressed into two composite plates of 1 mm and 0.5 mm thickness.

Step 2: Preparation of FRP layer

The high-quality epoxy resin and glass fiber were pressed into two composite plates of thickness of 0.5 inrn.

Step ≤ Step: Preparation of active metal layer

Use a 3 m thick aluminum plate.

Fourth 歩: Preparation of anode plate

A 1 mm graphite layer, a 0.5 FRP layer, and a 0, 5 graphite layer were sequentially laminated with a conductive adhesive to obtain two identical outer layer composites, wherein the 0 5 graphite layer and the aluminum layer were Adjacent, the two composite materials are respectively placed on both sides of the active metal aluminum layer, and then the conductive adhesive is bonded and flattened to obtain the anode plate of the present invention. Implementation of the inverted 6. EFT sewage treatment equipment EFT sewage treatment equipment

As shown in the drawing, the inside of the sewage treatment apparatus of the present invention is alternately arranged by an anode plate, two transition plates, a cathode plate, and two transition plates, for a total of 31 plates.

The anode plate is composed of the anode plate of Embodiment 1, that is, a graphite layer, a glass steel layer, a graphite layer, an aluminum layer, a graphite layer, a glass steel layer, and a graphite layer; wherein the thickness of the graphite layer is 5 mm _; The thickness of the graphite layer is zero. 8毫米; The thickness of the aluminum layer is 1 mm, and the thickness of the FRP layer is 0.5 mm. The preparation process is the same as that of the cathode plate of the present invention, and the anode plate is obtained after the ffi conductive adhesive is bonded and flattened.

The cathode plate is composed of a graphite layer, a spurted active metal layer, a graphite layer, a glass steel layer, a graphite layer, a spurted active metal layer and a graphite layer in sequence; wherein each graphite layer has a thickness of 0. 8分钟, the sprinted aluminum layer is 1 mm thick and the 0.6 mm thick glass steel layer.

The thickness of the layer of the aluminum layer is 0. 8 thick. The thickness of the graphite layer is 0 mm. , sprinted aluminum sheet layer thickness 0. 8

EFT sewage treatment equipment II

The anode plate is composed of the anode plate of Embodiment 2, that is, a graphite layer, a glass steel layer, a graphite layer, an aluminum layer, a graphite layer, a glass steel layer, and a graphite layer; wherein each graphite layer has a thickness of 1 mm; The thickness of the layer is 0, 8 mm _; the thickness of the FRP layer is 0 „ 8 mm.

The thickness of the graphite layer is 0. 8^, the thickness of the aluminum layer is 1 thorn. The cathode plate is composed of a graphite layer, an active metal layer, a graphite layer, an active metal layer, and a graphite layer. The preparation process is the same as the process of the anode plate of the present invention, and after the flattening is performed by bonding with a conductive adhesive, a cathode plate is obtained.

The transition plate is composed of a graphite layer, a spurted active metal layer, a graphite layer, a glass steel layer, a graphite layer, an active metal layer, a graphite layer, a glass steel layer and a graphite layer, wherein the thickness of the graphite layer is 0. 5 mm, one piece of aluminum is 1 leg thick' sprinted aluminum plate layer thickness 1 and FRP layer thickness is 0, 5 mm. The preparation process is the same as that of the anode plate of the present invention, and the transition is obtained after bonding with glue. board.

EFT sewage treatment equipment three

As shown in the drawing, the inside of the sewage treatment equipment of the present invention is alternately arranged by a ro plate, two transition plates, a cathode plate, and two transition plates, for a total of 31 plates. The thickness of the graphite layer is 0.6 mm; the aluminum layer is composed of a graphite layer, a glass layer of a graphite layer, a layer of a layer of a layer of a layer of a layer of a layer of a layer of a layer of a layer of a graphite layer; the thickness of 1. 2 _nim; thickness of the FRP layer was 0. 8 mm, the same process for manufacturing the cathode plate of the present invention, the use of glue flattened to obtain an anode plate.

The cathode plate is composed of a graphite layer, an aluminum layer, and a graphite layer in a three-layer structure: wherein each graphite layer has a thickness of 0.6 mm, and the aluminum layer has a thickness of 1 mm, and the preparation process is the same as that of the anode plate of the present invention. After the 3⁄4 is bonded with a glue, the cathode plate is obtained.

The transition plate is composed of a graphite layer, a spurted aluminum layer, a graphite layer, and an aluminum layer. The thickness of the graphite layer is 0.8 mm, the aluminum layer is 1 m thick, and the thickness of the sprinted aluminum plate is 1 The process is the same as that of the anode plate of the present invention, and the transition plate is obtained after the bonding of the 3⁄4 glue is flat.

EFT sewage treatment equipment four

The anode layer ffl graphite layer 1mm, the glass steel layer 0. 5 '" graphite layer 0. 5mm, aluminum layer 3 graphite layer 0, 5 glass steel layer 0. 5 ιTM, graphite layer ImiE 7-layer structure, preparation process and The process of the transition plate of the invention is the same,

After the 3⁄4 is bonded with a glue, the anode plate is obtained.

The cathode plate consists of a graphite layer of 0, 5 carbon steel plate layer 0.3 mm, a graphite layer 0, 5, a FRP layer 丄 mm, a graphite layer 0, 5 mm, a carbon steel plate layer 0.5. A graphite layer 0, 5 min of a 7-layer structure The preparation process is the same as the process of the transition plate of the present invention, and after the flattening is performed by adhesive bonding, the cathode plate is obtained.

The graphite layer is 0. 5 graphite layer 0. 5 graphite layer 0. 5 graphite layer 0. 5 aluminum layer 2; graphite layer 0. 5 glass steel layer 0. 5 graphite A 9-layer structure consisting of 0.5.

EFT sewage; 3⁄4 rational equipment five

The anode plate consists of a graphite layer lm, a FRP layer 0, 5; a graphite layer of 0.5 mm, an aluminum layer of 3 mm, a graphite layer of 0.5 mm, a FRP layer of 0.5 mm, and a graphite layer of 1 m. The process is the same as that of the transition plate of the present invention, and after the flattening is carried out by adhesive bonding, the anode plate is obtained. The cathode plate is composed of a three-layer structure of a graphite layer lm and a carbon steel plate layer of 0, 5 ΐ 石墨 graphite layer Ιιπιη; the preparation process is the same as the process of the transition plate of the present invention, and the cathode plate is obtained after flat bonding by adhesive bonding.

The transition plate is composed of a four-layer structure of Embodiment 5, that is, a graphite layer 1 carbon steel layer (). 5 graphite layer aluminum layer 3:. Example 7. EFT wastewater treatment process

As shown in the accompanying drawings, the wastewater treatment process of the present invention is to pass sewage, such as electroplating sewage, into a sewage treatment facility (EFT) containing the electrode plate of the present invention, and then adjust it by an EFT pH automatic adjustment machine, and then The adjusted sewage is respectively introduced into a plurality of side-by-side mud-water separation tanks, and the separated clean water is directly introduced into the clean water collecting tank, and the impurity portion is introduced into the sludge collecting tank. If further treatment is required, the clean water obtained in the fresh water collecting bubble is passed to the carbon sand filter tower for secondary treatment, and then the treated wastewater is reused or discharged to the clear water tank for use. Example 8. Application of composite electrode

Example 1 Efficient EFT inert composite electrode for sewage treatment

Example of treatment of sewage by EFT inert composite electrode 1

For the electroplating wastewater with a daily processing capacity of 150 tons in an electroplating plant, the wastewater treatment was carried out according to the process of Example 6. After 60 minutes of treatment with the EFT inert processing equipment of Example 6 of the present invention, the water quality can be reused for reuse in the national 2008 special discharge. standard.

Using EFT inert composite electrodes, 30 electrolytic cells with a spacing of 160 m were formed. The electrode wiring method is multi-pole wiring method (: +■ 0 0 0 0 + 0 0 ― ;), and the external power supply 220V transformer is 12V 24V 36V, and the current density depends on the sewage quality. Cell size: 5G00min long, 1500mm wide, 1800mni high (10 tons of electroplating wastewater per hour)

Electrode plate size: length 1 100 miii, width 1 100 ma, thickness (1.5 to 5, 5 mm)

Starting current 360A 10 minutes 276 A 45 minutes 270 A 60 minutes 265 A

The 60-minute sewage treatment has been monitored by local environmental monitoring stations. The data results are:

Example 2 when treating wastewater with EFT inert composite electrode

The wastewater treatment of the electroplating wastewater of 1000 tons per day of an electronic circuit company is carried out according to the process of the embodiment 6. The water quality of the EFT inert electrolysis apparatus of the sixth embodiment of the invention is treated for 60 minutes, and the water quality can be reused and reached. National 2008 special emission standards.

An EFT inert composite electrode was used to make 30 electrolytic cells with a spacing of 160 brains. The electrode wiring method is multi-pole wiring method (10 0 0 - 0 0 ÷ 0 0 ―) plus power supply 220V transformer voltage is 12V, 24V, 36V, and the current density depends on the sewage quality. Cell size: 4800 rniiK width 1400 诵, height 1600 诵 (10 tons of electroplating wastewater per hour). Electrode plate size; length 1000m, width 900 mm, thickness (1, 5 brain to 6, 5 mm). Starting current 275A, 10 minutes 256A, 45 minutes 206 A, 60 minutes 175 A

The 60-minute sewage treatment has local environmental monitoring supervisors. The data results are shown in Table 2:

Example 3 when treating wastewater with EFT inert composite electrode

According to the process of Example 6 for the electroplating wastewater with a daily processing capacity of 300 tons in an electroplating plant, the wastewater treatment can be carried out by using the EFT inert electrolysis apparatus of the sixth embodiment of the present invention for 60 minutes, and the water quality can be reused to achieve the new emission of the national 2008. standard.

Using EFT inert composite electrodes, 30 electrolytic cells with a pitch of 160 mm were formed. The electrode wiring method is multi-pole wiring method (+■ 0 0 0 0 + 0 0 ). The external power supply 220V transformer is 12V, 24V, 36V, and the current density depends on the sewage quality. Cell size: 4800mm long, 1800mm wide, ISOCMm (processing 丄 G ton of electroplating wastewater per hour), electrode plate size: length 1200 y, width l lOOmiiK thick (1.5 m to 8 ram). Starting current 385A, 10 minutes 275A, 45 minutes 262 A, 60 minutes 230A

The 60-minute sewage treatment was monitored by the local environmental monitoring station. The data results are shown in Table 3: Contaminant

自自 Total copper COD 1 PH value Influent concentration /mg/L 18, 4 15. 3 451 1. 7

73. 3

Effluent concentration /mg/L 0, 037 0, 1 0. 060 63 1 7. 2 Example of treatment of sewage with EFT inert composite electrode 4

For the electroplating wastewater with a treatment capacity of 2,000 tons per day, the wastewater treatment was carried out according to the process of Example 6. After 60 minutes of treatment with the EFT inert electrolysis apparatus of Example 6 of the present invention, the water quality can be reused to achieve the new emission of the national 2008. standard.

Using EFT inert composite electrodes, 30 electrolytic cells with a pitch of 180 were formed. The electrode wiring method is multi-pole wiring method (+ 0 0 — 0 0 + 0 0 — ). The external power supply 220V transformer is 12V 24V 36V, and the current density depends on the sewage quality. Cell size: length 48 (i () iBm, width 1500 high 1800 ΪΜΙ (10 tons of electroplating wastewater per hour). Plate size: length l lOOmnK width 1100 thick [1 5 legs to 10 mm). Starting current 420A 10 minutes 386A, 45 minutes 295A 60 minutes 265A

The 60-minute sewage treatment is monitored by the local environmental monitoring station. The data results are as shown in Table IV:

Claims

An electrode plate comprising a multilayer structure composed of at least an active metal layer of an inner layer and a three-layer structure of a graphite layer on both sides of the active metal.

The electrode plate according to claim 1, wherein one side of the multilayer structure is further provided with a graphite layer and an insulating material layer between the active metal and the graphite layer, the side layer The structure from the outside to the inside is a graphite layer, an insulating material layer, a graphite layer and an active metal layer.

The electrode plate according to claim 2, wherein a graphite layer and an insulating material layer are sequentially disposed between the active metal and the graphite layer on the other side, that is, the other side multilayer structure is from the outside to the inside. The graphite layer, the insulating material layer, the graphite layer and the active metal layer are in this order.

The electrode plate according to claim 1, wherein one side of the multilayer structure is further provided with an active metal layer and an insulating material layer between the graphite layer and the active metal, the side layer The structure from the outside to the inside is a graphite layer, an active metal layer, an insulating material layer and an active metal layer.

The electrode plate according to claim 4, further comprising an active metal layer and an insulating material layer between the graphite layer and the active metal on the other side of the multilayer structure, the side The layer structure 甶 externally inward is a graphite layer, an active metal layer, an insulating material layer and an active metal layer.

The electrode plate according to claim 1, wherein a layer of active metal is further provided on the outer layer of graphite on one side.

The electrode plate according to any one of claims 1 to 6, wherein the insulating material layer is a glass steel layer.

The electrode plate according to claim 3, wherein the electrode plate is composed of a graphite layer, a glass steel layer, a graphite layer, an aluminum layer, a graphite layer, a glass steel layer, and a graphite layer.

The electrode plate according to any one of claims 1 to 8, characterized in that the active metal is iron or aluminum _[

The electrode plate according to any one of claims 1 to 9, wherein the active metal layer is subjected to a spur treatment,

The electrode plate according to claim 10, wherein one or more layers of the active metal in the multilayer active metal are subjected to a spur treatment.

The electrode plate according to any one of claims 1 to 11, wherein the electrode plate is used as an anode plate > 3. - an electrolysis device, characterized in that it comprises any one of 1 - 42 Electrode plate.

14. An electrolysis apparatus according to claim 13 further comprising a cathode plate and optionally Ferry board.

The electrolysis apparatus according to claim 13 or 14, wherein the electrolysis apparatus comprises at least one electrode plate according to any one of claims 1 to 12, a cathode plate, and a cathode plate, and an anode plate. At least two transition plates between the anode plates.

16. The electrolysis apparatus according to claim 15, comprising at least three transition plates.

17. A method of manufacturing an electrode plate, comprising the step of pressing a conductive paste.

18. The method of manufacturing an electrode pad according to claim 17, comprising the steps of: a, preparing a graphite layer.

The composite graphite of the different raw materials is preferably 99.8% or more of the high-quality expanded graphite worm pressed into a composite flat plate of 0. -2 _If mi thickness;

b. Preparation of optionally inert material layers

Selecting a 3⁄4 high-quality epoxy resin and glass fiber into a composite plate having a thickness of 0.33 m;

Preparation of C active metal layer

Selecting a 0. 2-5 mm thick active metal material, optionally sprinting;

d. Preparation of anode plates

The prepared graphite layer, the optionally spurted active metal aluminum layer and the inert material layer are sequentially discharged according to the multilayer structure of the anode plate, and are bonded and flattened with a conductive adhesive, and then fixed with nylon bolts to obtain a flat. The anode plate is described.

The method of manufacturing an electrode plate according to claim 18, wherein in step d, the active metal, carbon steel or stainless steel layer is separately formed according to the number of active metal, carbon steel or stainless steel layers. The first composite material or the second composite material is then sequentially discharged to produce the desired electrode plate according to the requirements of the multilayer structure.

The method of manufacturing an electrode plate according to claim 18 or 19, wherein the order of the steps ₃ , b, and c is variable.