CN219058633U - Lifting electrode type electrochemical circulating water treatment device - Google Patents
Lifting electrode type electrochemical circulating water treatment device Download PDFInfo
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- CN219058633U CN219058633U CN202222521126.6U CN202222521126U CN219058633U CN 219058633 U CN219058633 U CN 219058633U CN 202222521126 U CN202222521126 U CN 202222521126U CN 219058633 U CN219058633 U CN 219058633U
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Abstract
The utility model provides a lifting electrode type electrochemical circulating water treatment device which comprises a box body, wherein the upper part of the box body is open, the lower part of the box body is connected with a conical structure, a plurality of negative plates and positive plates are distributed in the box body, the positive plates are arranged in a staggered manner and are positioned in the middle of the two negative plates, a top fixing rod is connected above the negative plates, the negative plates are electrically connected with a circuit system through the external connection of the top fixing rod, the top fixing rod is connected with a screw rod through a double-ended sleeve, the screw rod is fixed on the outer side of a box body shell, the screw rod is driven by a motor or a pneumatic motor to move up and down along the vertical direction, so that the negative plates are driven to move up and down, a scraper is arranged between every two negative plates, two wings of the scraper are contacted with the negative plates, the scraper is positioned at the position of the opening of the upper end of the box body, and the two ends of the bottom of the scraper are fixed with the box body. The utility model solves the problems of complex structure, high maintenance frequency and the like of the traditional electrochemical equipment through the unique structural arrangement, and improves the operation stability of the technology.
Description
Technical Field
The utility model belongs to the technical field of environmental protection equipment, and particularly relates to a lifting electrode type electrochemical circulating water treatment device.
Background
The industrial circulating cooling water system is mainly used for cooling process media, ensures production development and is widely applied to various industrial fields such as petrochemical industry, coal chemical industry, thermal power generation, new materials, medicines and the like. Three problems of scaling, corrosion and bacterial algae breeding occur widely in the operation process of the circulating cooling water system, and the production is affected. Meanwhile, the occurrence of three problems affects the improvement of the concentration multiple, and the water supplementing quantity and the sewage discharging quantity of the system are large. At present, the circulating water system mainly adopts a mode of adding chemical agents to maintain the operation of the system, but most circulating water systems only have the operation concentration multiple of below 3, and the addition of the chemical agents can bring secondary pollution to water bodies, so that the circulating water system cannot adapt to increasingly strict environment-friendly situations in China.
In view of this, attempts have been made in the industry to solve the running problems of the circulating water system, such as ultrasonic treatment, strong magnetic treatment, high-voltage electrostatic field treatment, etc., but the problems of immaturity, low treatment efficiency, inability to be widely applied to circulating water systems in different fields and industries, etc. exist. Thus, the development of electrochemical water treatment technology will become the focus of development in the next stage. The electrochemical water treatment technology utilizes the electrochemical principle, only removes scale forming ions (mainly calcium ions and magnesium ions) existing in water through electric energy, has certain effects of sterilization, algae removal and corrosion prevention, can improve the operation concentration multiple, reduces the sewage discharge amount and the water supplementing amount, and has multiple effects of saving water, reducing pollution, reducing operation cost and the like. The country proposes in the energy-saving environment-friendly field development planning guidance opinion, with the aim of making a strong energy-saving environment-friendly industry, in the energy-saving environment-friendly resource recycling field, quickens the promotion and application of prospective technology innovation and advanced mature technology and the development of service industry, builds a novel industrial system which is more economical, cleaner, more efficient, more beneficial to people and more competitive, and builds the novel pillar industry. Under the large form of greatly promoting environmental protection, energy conservation and emission reduction in China, the electrochemical water treatment technology has wide prospect and becomes the development focus of the next-stage circulating water treatment field.
In recent ten years, the electrochemical circulating water treatment technology has higher development speed in China and gradually improves the industrial acceptance, but the equipment basically has the problems of unreasonable structural arrangement, frequent maintenance times and the like, restricts the further development of the technology, and has the outstanding problems of: the scraper has the advantages of higher corrosion rate, complex structure, inconvenient installation and maintenance, and the like.
Disclosure of Invention
In order to solve the problems, the utility model discloses a lifting electrode type electrochemical circulating water treatment device, which solves the problems of complex structure, high maintenance frequency and the like of the traditional electrochemical equipment through unique structural arrangement and improves the operation stability of the technology.
In order to achieve the above purpose, the technical scheme of the utility model is as follows:
the lifting electrode type electrochemical circulating water treatment device comprises a box body, wherein the upper part of the box body is open, the lower part of the box body is connected with a conical structure, a plurality of cathode plates and anode plates are distributed in the box body, the anode plates are arranged in a staggered manner to ensure that the anode plates are positioned between the two cathode plates, the anode plates are of rectangular plate-shaped structures, two round holes which are bilaterally symmetrical are arranged at the upper left part and the upper right part of the anode plates, the through holes are used for externally connecting a circuit system for conduction, the anode plates are fixed with the inner wall of the box body, a plastic jacket is arranged at the joint of the inner wall of the box body and the anode plates, insulation between the inner wall of the box body and the anode plates is ensured, and the upper end of the anode plates is lower than the opening at the upper end of the box body; the negative plate is polygonal platy structure, the rectangular structure of lower extreme and the isosceles trapezoid structure combination of upper end, the rectangular structure of negative plate lower extreme is in just right the position with the anode plate, negative plate upper end isosceles trapezoid is higher than box upper end open department, the top dead lever is connected to the negative plate top, the negative plate is electrically conductive through the external circuit system of top dead lever, the top dead lever passes through bi-polar sleeve joint lead screw, the outside at the box shell is fixed to the lead screw, the lead screw can follow vertical direction and reciprocate by motor or pneumatic drive to drive the negative plate up-and-down motion, be provided with the scraper between every two negative plates, scraper both wings and negative plate contact, the scraper is located box upper end open department, the both ends and the box of bottom are fixed.
Further, the number of the anode sheets is 12 to 20, the number of the cathode sheets is 1 more than that of the anode sheets, and the spacing between the cathode plate and the anode plate is controlled to be 20mm to 40mm.
Further, the base material of the anode plate is a titanium plate, the surface of the anode plate is plated with ruthenium iridium, iridium tantalum or platinum noble metal, and the thickness of the anode plate is controlled to be 2mm to 4mm.
Further, the cathode plate is made of carbon steel, stainless steel or high manganese steel, and the thickness of the cathode plate is controlled to be 5-8 mm.
Further, the scraper is of a groove structure, the bottom is a plane, the two wings and the bottom plane are of an obtuse angle of 120-150 degrees, the two wings are of a symmetrical structure, the opening is upward, the scraper is made of carbon steel, stainless steel or high manganese steel, and the scraper is made of the same material as the cathode.
Further, in the length direction of the box body, a water inlet is formed in one side, a water outlet is formed in the other side, the water inlet is close to the bottom of the box body, the water outlet is close to the opening of the upper end of the box body, a sewage outlet is formed in the bottom of a conical structure below the box body, and electric valves are arranged at the water inlet, the water outlet and the sewage outlet.
The beneficial effects of the utility model are as follows:
at present, most of domestic electrochemical circulating water treatment products have the problems of high maintenance frequency, difficult assembly and disassembly and the like, and one major reason for the current situation is that the scraper is soaked in water for a long time, so that the scraper is extremely easy to corrode, equipment is generally required to be disassembled and replaced after 2 to 4 months, the time and the labor are wasted, the service life of the equipment is influenced by frequent disassembly equipment, and the use experience of a user is also influenced. The device creatively provides a technology for placing the scraper on the water surface, fundamentally solves the problem that the scraper is easy to corrode, greatly reduces the maintenance frequency of equipment, and simultaneously, the structure of the equipment can be fully simplified, and the assembling and disassembling processes of the equipment are not complicated.
Drawings
FIG. 1 is a front view of the present utility model;
FIG. 2 is a top view of the present utility model;
figure 3 is a schematic structural view of an anode plate of the present utility model;
FIG. 4 is a schematic view of the structure of the cathode plate of the present utility model;
FIG. 5 is a top view of the case of the present utility model;
fig. 6 is a schematic structural view of the doctor blade of the utility model, in which (a) is a top view and (b) is a left side view.
In the figure: 1. an anode plate; 2. a cathode plate; 3. a top end fixing rod; 4. a case; 5. a sleeve; 6. an electric/pneumatic motor; 7. a screw rod; 8. a sewage outlet; 9. a water inlet; 10. a water outlet; 11. a scraper.
Detailed Description
The present utility model is further illustrated in the following drawings and detailed description, which are to be understood as being merely illustrative of the utility model and not limiting the scope of the utility model.
As shown in fig. 1-6, the lifting electrode type electrochemical circulating water treatment device of the embodiment comprises a box body 4, wherein the upper part of the box body is open, the lower part of the box body is connected with a conical structure, a plurality of cathode plates 2 and anode plates 1 are distributed in the box body, the anode plates are arranged in a staggered manner to ensure that the anode plates are positioned between the two cathode plates, the anode plates are of rectangular plate-shaped structures, two circular holes which are bilaterally symmetrical are arranged at the upper left and upper right of the anode plates, the through holes are used for externally connecting a circuit system for conduction, the anode plates are fixed with the inner wall of the box body, a plastic jacket is arranged at the joint of the inner wall of the box body and the anode plates, insulation between the inner wall of the box body and the anode plates is ensured, and the upper end of the anode plates is lower than the opening of the upper end of the box body; the negative plate is polygonal platy structure, the rectangular structure of lower extreme and the isosceles trapezoid structure combination of upper end, the rectangular structure of negative plate lower extreme is in just right the position with the anode plate, negative plate upper end isosceles trapezoid is higher than box upper end open department, top dead lever 3 is connected to the negative plate top, the negative plate is electrically conductive through the external circuit system of top dead lever, the top dead lever passes through bi-polar sleeve 5 and connects lead screw 7, the outside at the box shell is fixed to the lead screw, the lead screw is driven by motor or pneumatic motor 6 and can follow the vertical direction and reciprocate, thereby drive the negative plate up-and-down motion, be provided with scraper 11 between every two negative plates, scraper both wings and negative plate contact, the scraper is located the box upper end open department, the both ends and the box of bottom are fixed.
The number of the anode plates is 12 to 20, the number of the cathode plates is 1 more than that of the anode plates, and the spacing between the cathode plate and the anode plate is controlled to be 20mm to 40mm. The base material of the anode plate is a titanium plate, the surface of the anode plate is plated with ruthenium iridium, iridium tantalum or platinum noble metal, and the thickness of the anode plate is controlled to be 2 mm-4 mm. The cathode plate is made of carbon steel, stainless steel or high manganese steel, and the thickness of the cathode plate is controlled to be 5-8 mm. The scraper is of a groove structure, the bottom is a plane, the two wings and the bottom plane form an obtuse angle of 120-150 degrees, the two wings are of a symmetrical structure, the opening is upward, the scraper is made of carbon steel, stainless steel or high manganese steel, and the scraper is made of the same material as the cathode. The water inlet 9 is formed in one side of the box body in the length direction, the water outlet 10 is formed in the other side of the box body, the water inlet is close to the bottom of the box body, the water outlet is close to the opening of the upper end of the box body, the bottom of the conical structure below the box body is provided with a sewage outlet 8, and the electric valves are arranged at the water inlet, the water outlet and the sewage outlet.
When the device operates, the water inlet and the water outlet are opened, circulating water is filled in the box body, the cathode and the anode are conductive through the circuit system, the cathode and the anode perform electrochemical reaction under the condition of being electrified, the purpose of treating the circulating water is achieved, at the moment, the device is in a pre-scaling state, a scale layer can be continuously generated on the cathode plate in the operation process, the scale scraping program is set for 2 to 6 hours, 1 time is started through the PLC program, when the scale scraping program is started, the device enters the scale removing state, the water inlet and the water outlet are closed, the motor or the pneumatic motor drives the screw rod to ascend, the top fixing rod and the cathode plate integrally ascend, when the bottom of the cathode plate reaches the position of the scraper, the motor or the pneumatic motor drives the screw rod to descend, the top fixing rod and the cathode plate integrally descend to the initial position, friction is generated between the cathode plate and the scraper in the ascending and descending processes, and therefore scale layers formed on the cathode plate are scraped, and scale drops into the box body water. After the cathode plate is restored to the initial position, the water inlet and the sewage outlet are opened, circulating water containing scale is discharged from the device, after the sewage outlet is opened for 2 to 3 minutes, the sewage outlet is closed, the water outlet is opened, and the device is restored to a normal pre-scaling state. The whole process of the device from the pre-scaling state to the scaling state and then recovering to the pre-scaling state is controlled by the PLC, and the device runs fully automatically without manual operation.
When the device is operated, the control voltage is 12-24V, the voltage is kept fixed, and the current floats according to the total area of the anode, the conductivity of water quality and other factors, and is generally 600-1200A.
In this embodiment, the size of the case 4 is long, wide, high=1500 mm, 1000mm, 1700mm, and the case is divided into an upper part and a lower part, the upper part is a cuboid structure, the upper part is composed of four plates, namely, a front plate, a rear plate, a left plate and a right plate, the lower part is a conical structure, and the height is 300 mm. The main body of the box body is made of Q235B carbon steel, the thickness of the carbon steel plate is 6.5mm, and the box body is subjected to corrosion prevention treatment and is finished after polishing, sand blasting, priming and finishing processes.
The length of the anode plate 1 is equal to the height of the anode plate = 1485mm x 1300mm x 3mm, two circular holes which are bilaterally symmetrical are arranged at the upper left and upper right of the anode plate and are used for externally connecting a circuit system for conduction, the radius of each circular hole is 5mm, and the distances between the center of each hole and the nearest two edges of the anode plate are 50mm. The base material of the anode plate 1 is a titanium plate with the thickness of 3mm, the two sides of the plate are plated with ruthenium iridium noble metal, and the thickness of the coating is 3 mu m. The anode sheet is 15 sheets.
The cathode plate 2 is of a polygonal plate-shaped structure, and is formed by combining a rectangular structure at the lower end with an isosceles trapezoid structure at the upper end, wherein the rectangular structure at the lower end is equal to the length of the isosceles trapezoid structure at the upper end in x high=1480 mm x 1300mm, the lower bottom length of the isosceles trapezoid structure at the upper end is 1480mm, the upper bottom length of the isosceles trapezoid structure is 380mm, and the waist length of the isosceles trapezoid structure at the upper end is 640mm. The thickness of the cathode plate is 6mm, and high manganese steel is selected as the material. 16 cathode plates are selected.
The length of the top fixing rod 3 is 1200mm, the width is 380mm, and the thickness is 100mm; the diameter of the screw rod 7 is 25mm; the inner diameter of the connecting sleeve 5 is 25mm and the outer diameter is 60mm.
The length of the scraper 11 is 1480mm, the length of the bottom edge is 30mm, the lengths of the two wings are 21.2mm when seen from the left view of the scraper, the thickness of the scraper is 3mm, and high manganese steel is selected as the material.
The water inlet 9 is DN150, and the center of the hole is 175mm away from the edge of the lower end of the cuboid structure above the box body; the size of the water outlet 10 is DN250, and the center of the hole is 175mm away from the edge of the upper end of the cuboid structure above the box body; the drain outlet 8 is DN150.
The interval of anode plate 1 and negative plate 2 is 30mm, and the rectangle structure of anode plate and negative plate lower extreme is just to arranging, has guaranteed current distribution's stability, and the resistance is less, realizes high work efficiency. The voltage is 15V and the current is 700-900A when the device is operated.
The device achieves the following effects: when the scale removing agent is applied to an industrial circulating cooling water system, under the condition of high current, electrochemical reaction occurs between a cathode and an anode, scale forming ions such as calcium, magnesium and the like in circulating water can be separated out in advance in a scale form in a cathode area and attached to the surface of the cathode, and the scale is peeled off from the cathode and discharged from equipment by periodically starting a scale removing program, so that the scale removing effect is achieved. In the vicinity of the anode region, a large amount of strong oxides can be intensively generated, such as: hypochlorous acid, ozone, oxygen free radicals, hydroxyl free radicals, hydrogen peroxide and the like, the sterilization and algae removal effects are realized, chloride ions in the circulating water can be converted into chlorine gas and are partially discharged from the equipment near the anode region, the corrosion problem caused by the chloride ions is relieved, and meanwhile, the alkalinity in the circulating water can be neutralized by the strong acid environment generated near the anode region, so that the effect of reducing the scaling tendency is achieved.
Compared with the domestic electrochemical equipment of the same type, the method has the advantages that: the domestic scraper of the same type electrochemical equipment is easy to corrode, and the scraper needs to be replaced basically for 2 to 4 months. The device has simple and reasonable structure, is convenient to assemble and disassemble, and reduces the time consumption by more than 50% compared with domestic electrochemical equipment of the same type.
The working principle of the device comprises:
when circulating water flows through the device, electrochemical reaction occurs, a large amount of hydroxide ions are generated in the cathode region, so that a strong alkaline environment is formed in the region, a small amount of carbon dioxide dissolved in the water is combined with the hydroxide to produce carbonate, and ions which are easy to scale react with the hydroxide and the carbonate, scale in advance and are attached to the cathode. The scale scraping system of the device can periodically scrape the scale generated on the cathode. The main chemical reaction equations are as follows:
2H 2 O+2e - → H 2 +2OH - CO 2 + 2OH - → CO 3 2- +H 2 O
CO 3 2- + Ca 2+ → CaCO 3 ∈ (incrustation scale) Mg 2+ + 2OH - →Mg(OH) 2 ↓
The alkaline in the circulating water can be neutralized by electrochemical reaction to generate an acidic environment near the anode, so that the scale inhibition effect is achieved. In addition, in the vicinity of the anode, chloride ions are converted into free chlorine, and meanwhile, strong oxidizing substances such as hydroxyl radicals and the like are generated, and the product has the effects of sterilizing and killing algae by combining current and local high and low (anode) pH values. The chlorine ions in the circulating water can be converted into chlorine gas and partially discharged from the equipment near the anode region, so that the corrosion is retarded. The main chemical reaction equation is as follows:
H 2 O →•OH + H + + e - OH - →•OH + e -
2Cl - －2e - → Cl 2 ↑ Cl 2 + H 2 O → HCl + HClO
6ClO - + 3H 2 O → 2ClO 3- + 4Cl - + 6H + + 3/2O 2 ↑ + 6e -
in order to better embody the long-term operation effect of the device, the situation when the device is applied to a circulating water system is described. An existing industrial circulating cooling water system has water quantity of 2000 m 3 The method comprises the steps of carrying out a first treatment on the surface of the The circulating water quantity is 5000 m 3 /h; the working concentration multiple was 3. After a set of lifting electrode type electrochemical circulating water treatment device (15 anodes, 16 cathodes, current of 800A and voltage of 15V) is adopted, the device is operated for 4 weeks, the concentration multiple of a circulating water system is lifted to 6, the calcium hardness, the alkalinity and the chloride ions of the circulating water system are effectively controlled, and the water-related parameters of the circulating water system are changed as follows:
TABLE 1 Water correlation index trend after electrochemical device use
| Project | Original system | For 1 week | For 2 |
3 weeks | 4 weeks of |
| Calcium hardness (mg/L) | 500 | 412 | 387 | 366 | 350 |
| Chloride ion (mg/L) | 430 | 368 | 345 | 330 | 320 |
| Alkalinity (mg/L) | 370 | 314 | 287 | 258 | 240 |
| Total number of heterotrophic bacteria (CFU/ml) | 9000 | 6700 | 5200 | 4300 | 3500 |
| |
3 | 4.2 | 5.1 | 5.6 | 6 |
| Dosage of medicament (kg/d) | 120 | 90 | 80 | 70 | 60 |
| Make-up water (m) 3 /h） | 60 | 55 | 52 | 50 | 48 |
| Pollution discharge amount (m) 3 /h） | 20 | 15 | 12 | 10 | 8 |
From the table, the lifting electrode type electrochemical circulating water treatment device effectively reduces the calcium hardness, chloride ions and alkalinity in the circulating water, thereby reducing the scaling tendency and relieving the chloride ion corrosion; the total number of heterotrophic bacteria is reduced by more than 60%, and the sterilization and algae removal effects of the device are obvious. The concentration multiple is increased from 3 to 6, the corresponding water supplementing amount of the circulating water is saved by 20%, the sewage draining amount is reduced by 60%, the effects of saving water and reducing emission are effectively achieved, the environmental protection benefit is outstanding, and meanwhile, the water supplementing cost and the sewage draining treatment cost of enterprises are greatly reduced, and the economic benefit is achieved; the dosage of the circulating water agent is reduced by 50%, the secondary pollution to the circulating water body caused by the chemical agent is reduced, and the environmental protection benefit is further improved. The process can effectively replace the traditional chemical agent circulating water treatment process and promote the green and healthy development of the circulating water treatment industry.
It should be noted that the foregoing merely illustrates the technical idea of the present utility model and is not intended to limit the scope of the present utility model, and that a person skilled in the art may make several improvements and modifications without departing from the principles of the present utility model, which fall within the scope of the claims of the present utility model.
Claims (6)
1. The lifting electrode type electrochemical circulating water treatment device is characterized by comprising a box body, wherein the upper part of the box body is open, a conical structure is connected to the lower part of the box body, a plurality of cathode plates and anode plates are distributed in the box body, the anode plates are arranged in a staggered manner to ensure that the anode plates are positioned between the two cathode plates, the anode plates are of rectangular plate-shaped structures, two round holes which are bilaterally symmetrical are arranged at the upper left part and the upper right part of the anode plates, through holes are used for externally connecting a circuit system for conduction, the anode plates are fixed with the inner wall of the box body, a plastic jacket is arranged at the joint of the inner wall of the box body and the anode plates, insulation between the inner wall of the box body and the anode plates is ensured, and the upper end of the anode plates is lower than the opening at the upper end of the box body; the negative plate is polygonal platy structure, the rectangular structure of lower extreme and the isosceles trapezoid structure combination of upper end, the rectangular structure of negative plate lower extreme is in just right the position with the anode plate, negative plate upper end isosceles trapezoid is higher than box upper end open department, the top dead lever is connected to the negative plate top, the negative plate is electrically conductive through the external circuit system of top dead lever, the top dead lever passes through bi-polar sleeve joint lead screw, the outside at the box shell is fixed to the lead screw, the lead screw can follow vertical direction and reciprocate by motor or pneumatic drive to drive the negative plate up-and-down motion, be provided with the scraper between every two negative plates, scraper both wings and negative plate contact, the scraper is located box upper end open department, the both ends and the box of bottom are fixed.
2. The lifting electrode type electrochemical circulating water treatment device according to claim 1, wherein the number of the anode plates is 12 to 20, the number of the cathode plates is 1 more than the number of the anode plates, and the distance between the cathode plates and the anode plates is controlled to be 20mm to 40mm.
3. The lifting electrode type electrochemical circulating water treatment device according to claim 1, wherein the base material of the anode plate is a titanium plate, the surface of the anode plate is plated with ruthenium iridium, iridium tantalum or platinum noble metal, and the thickness of the anode plate is controlled to be 2mm to 4mm.
4. The lifting electrode type electrochemical circulating water treatment device according to claim 1, wherein the cathode plate is made of carbon steel, stainless steel or high manganese steel, and the thickness of the cathode plate is controlled to be 5-8 mm.
5. The lifting electrode type electrochemical circulating water treatment device according to claim 1, wherein the scraper is of a groove structure, the bottom is a plane, the two wings and the plane of the bottom form an obtuse angle of 120 degrees to 150 degrees, the two wings are of a symmetrical structure, the opening is upward, the scraper is made of carbon steel, stainless steel or high manganese steel, and the scraper material is the same as the cathode material.
6. The lifting electrode type electrochemical circulating water treatment device according to claim 1, wherein the water inlet is formed in one side of the box body in the length direction, the water outlet is formed in the other side of the box body, the water inlet is close to the bottom of the box body, the water outlet is close to the upper end opening of the box body, the bottom of the conical structure below the box body is a sewage outlet, and the electric valves are arranged at the water inlet, the water outlet and the sewage outlet.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202222521126.6U CN219058633U (en) | 2022-09-23 | 2022-09-23 | Lifting electrode type electrochemical circulating water treatment device |
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| CN202222521126.6U CN219058633U (en) | 2022-09-23 | 2022-09-23 | Lifting electrode type electrochemical circulating water treatment device |
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