A fully automated electrochemical circulating water treatment device and treatment method

Abstract

This invention discloses a fully automatic electrochemical circulating water treatment device and method, relating to the technical field of water treatment equipment. The device features an inlet pipe with an inlet solenoid valve at the bottom and an outlet pipe with an outlet solenoid valve at the top. An inlet baffle is fixed at the end of the inlet pipe inside the device. The device contains anode and cathode plates, with the upper end of the cathode plate connected to the device via a weight sensor. An ultrasonic generator and an automatic descaling device are fixed outside the device. A scraper holder with multiple scrapers corresponding to each cathode plate is located inside the device. The transmission components of the automatic descaling device are fixedly connected to the scraper holder, driving the scrapers to reciprocate along the cathode plate surface. A scale storage tank is located in the lower part of the device, with a drain pipe connected to its lower end and a drain solenoid valve installed. This invention features a simple and reasonable structure, fast and effective scale removal, and prevents scale from falling off the cathode plate and entering the water circulation system.

Description

Technical Field

[0001] This invention relates to the field of water treatment equipment technology, specifically to a fully automatic electrochemical circulating water treatment device and treatment method. Background Technology

[0002] The recycling of cooling water is a major way to save water and reduce emissions. During the operation of a circulating cooling water system, the water evaporates and becomes increasingly concentrated, promoting salt crystallization and scaling. In open systems, the water comes into contact with the atmosphere, allowing dust and microorganisms to enter the circulating water, producing scale or microbial slime. Furthermore, the abundant oxygen and corrosive ions in the water corrode the cooling system. Therefore, circulating cooling water often requires treatment such as chemical dosing, sedimentation, and filtration, including sediment control, microbial control, and corrosion control. Circulating water systems are constrained by various actual production conditions, and after years of optimized water quality management through chemical dosing, there is little room for further water saving and emission reduction solely from the perspective of water treatment chemicals. Therefore, it is necessary to combine other circulating water treatment processes to achieve the system's water saving and emission reduction goals.

[0003] The patent application number 202121607394.9, entitled "An Electrochemical Circulating Water Treatment Device", discloses a device that can realize online circulating water treatment by electrochemical means. Specifically, it discloses a base and a box. The box is set on the base, and the cathode plate and anode plate are set inside the box. Multiple sets of electrochemical reactions can be carried out simultaneously, and the treatment efficiency is high. However, this invention uses manual descaling and cannot realize automatic operation.

[0004] The patent application number 202120672817.9, entitled "An Electrochemical Descaling Device for Ultrasonic Descaling", discloses that an ultrasonic descaling component is provided on one side of the box, and also discloses that a water hardness tester, an inlet valve, an ultrasonic descaling component and a drain valve are connected to the control unit.

[0005] The patent application number 202022919243.9, entitled "An Electrochemical Circulating Water Automatic Descaling System", discloses a scraper assembly. After scale forms on the electrode surface, the scale on the cathode surface can be continuously removed by the scraper through cathode rotation.

[0006] Both of the above methods can achieve automatic descaling and operation, but their descaling effects have their shortcomings. Scrapers are generally effective at removing large scale layers from electrode plates, but they are not good at handling small, firmly adhering scale. While ultrasonic waves are suitable for various types of firmly adhering scale, large scale layers often become caked and difficult to remove. Furthermore, the descaling efficiency of both methods needs improvement. In addition, although some of the above solutions use water hardness as a descaling standard, this approach provides a limited view of the scale formation, affecting the automatic operation of the equipment. On the other hand, research and experimental observations show that existing electrochemical descaling devices all have the problem of scale layers detached from the cathode entering the circulating water system during circulation. This negatively impacts the normal operation of the entire water circulation system and significantly increases maintenance difficulty. Installing a fine filter at the outlet of the device easily leads to clogging. Therefore, a fully automatic electrochemical circulating water treatment device and method are urgently needed to solve these problems. Summary of the Invention

[0007] The purpose of this invention is to provide a fully automated electrochemical circulating water treatment device and method to solve the problems mentioned in the background art.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a fully automatic electrochemical circulating water treatment device, comprising a tank, wherein an inlet pipe and an inlet solenoid valve are provided on the lower part of one side, and an outlet pipe and an outlet solenoid valve are provided on the upper part of the other side. An inlet baffle is fixedly provided at the end of the inlet pipe inside the tank to disperse the water flow direction towards the outer periphery of the inlet baffle. At least one cathode plate and at least one anode plate are provided inside the tank, forming an electric field between them. The upper end of the cathode plate is connected to the tank through a weight sensor for real-time weighing of the cathode plate. The anode plate is fixedly connected to the tank.

[0009] Several ultrasonic generators and an automatic descaling device with drive and transmission components are fixedly installed on the outside of the housing. Inside the housing, there is a scraper holder with multiple sets of scrapers, each set corresponding to a cathode plate. The transmission component of the automatic descaling device passes through the housing from the top and is fixedly connected to the scraper holder. The automatic descaling device drives the scraper holder to make the scrapers reciprocate along the surface of the cathode plate, and the blade movement range of the scrapers covers the entire surface of the cathode plate. A scale storage tank is located in the lower part of the housing, below the cathode and anode plates, and a drain pipe is connected to its lower end and a drain solenoid valve is installed.

[0010] Preferably, it also includes a PLC automatic control system, and the enclosure is also equipped with a water hardness tester and a water alkalinity tester. The water hardness test probe and the water alkalinity test probe are respectively fixed below the liquid surface inside the enclosure; the power supply switches for the cathode plate and anode plate, the weight sensor, the water hardness tester, the water alkalinity tester, the inlet solenoid valve, the outlet solenoid valve, the drain solenoid valve, the drive component switch of the automatic descaling device, and the start / stop switch of the ultrasonic generator are respectively connected to the PLC automatic control system.

[0011] Preferably, the scale storage tank is funnel-shaped, and a support is fixed around the lower end of the tank.

[0012] Preferably, the inlet pipe and outlet pipe are respectively vertically arranged on two opposite sides of the housing, the cathode plate and anode plate are parallel and spaced apart, the cathode plate is perpendicular to the inlet pipe, and the ultrasonic generator is provided in two sets, which are respectively fixed on two sides of the housing perpendicular to the cathode plate.

[0013] Preferably, the weight sensor is a suspended load cell or an S-shaped tension sensor.

[0014] Preferably, the water inlet baffle is set perpendicular to the water inlet direction, and several connecting rods are fixedly provided on its outer periphery for fixed connection with the box body. There is a gap between the water inlet baffle and the inner wall of the box body, and its projection on the box body wall where the water inlet pipe is located covers the water inlet pipe opening.

[0015] A fully automated electrochemical circulating water treatment method, employing the aforementioned treatment device, includes the following specific steps:

[0016] Step 1: Open the outlet solenoid valve and the inlet solenoid valve, and close the drain solenoid valve. The circulating water will begin to circulate within the tank.

[0017] Step 2: Turn on the power supply to the cathode and anode plates to begin the electrochemical treatment;

[0018] Step 3: After the electrochemical circulating water treatment device has been running for a period of time, when the hardness, alkalinity or cathode plate weight in the circulating water exceeds the preset range, turn off the power supply to the outlet solenoid valve, inlet solenoid valve, cathode plate and anode plate, turn on the automatic descaling device and ultrasonic generator, and the scraper moves back and forth along the cathode plate surface, and the scale layer attached to the cathode plate falls into the scale storage tank.

[0019] Step 4: After running for a period of time, turn off the automatic descaling device and the ultrasonic generator, and open the drain solenoid valve to drain the scale.

[0020] Step 5: After draining the scale from the tank, close the drain solenoid valve;

[0021] Repeat steps 1 to 5 to achieve a loop.

[0022] Preferably, in step 3 above, the frequency of the ultrasonic generator is 20-80 kHz and the power density is 0.01-0.04 W / ml.

[0023] Preferably, in step 4 above, the automatic descaling device and the ultrasonic generator are turned off, and the weight of the cathode plate is used as the criterion for judgment.

[0024] Compared with the prior art, the beneficial effects of the present invention are:

[0025] 1. This fully automatic electrochemical circulating water treatment device has a simple and reasonable structure. By detecting the hardness, alkalinity, and cathode plate weight in the circulating water, it can more accurately reflect the operating status of the electrochemical circulating water treatment device. This allows for better setting of the descaling start and end times, which is conducive to more intelligent and fully automatic operation of the electrochemical circulating water treatment device.

[0026] 2. This fully automatic electrochemical circulating water treatment device, through the simple structural design of the inlet baffle, completely solves the problem that the scale layer on the cathode plate is washed away by the water flow and enters the water circulation system during the electrochemical treatment process. This not only directly improves the quality of the circulating water, but also reduces the amount of maintenance work.

[0027] 3. This fully automatic electrochemical circulating water treatment device and method improves the scale removal efficiency by using a combination of a scale scraping device and an ultrasonic generator. The scale is scraped off quickly and effectively, and the offline time for scale removal is shortened. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the front view structure of one embodiment of the present invention;

[0029] Figure 2 This is a top view of the internal structure of one embodiment of the present invention;

[0030] Figure 3 This is a front view internal structure diagram of one embodiment of the present invention.

[0031] In the diagram: 1. Housing; 2. Inlet pipe; 3. Inlet solenoid valve; 4. Outlet pipe; 5. Outlet solenoid valve; 6. Cathode plate; 7. Anode plate; 8. Automatic descaling device; 9. Scraper; 10. Scraper holder; 11. Scale storage tank; 12. Drain pipe; 13. Drain solenoid valve; 14. Inlet baffle; 15. Weight sensor; 16. Ultrasonic generator. Detailed Implementation

[0032] A fully automatic electrochemical circulating water treatment device includes a tank 1, with an inlet pipe 2 and an inlet solenoid valve 3 installed on the lower part of one side, and an outlet pipe 4 and an outlet solenoid valve 5 installed on the upper part of the other side. An inlet baffle 14 is fixedly installed at the end of the inlet pipe 2 inside the tank 1 to disperse the water flow direction towards the outer periphery of the inlet baffle 14, so as to eliminate the scouring of scale on the cathode plate by high-velocity inlet water and prevent scale from entering the water circulation system under the influence of water flow. At least one cathode plate 6 and at least one anode plate 7 are provided inside the tank 1, and an electric field is formed between them. The upper end of the cathode plate 6 is connected to the tank 1 through a weight sensor 15 (such as a suspended weighing sensor or an S-type tension sensor, etc.) for weighing the weight of the cathode plate 6 in real time. The anode plate 7 is fixedly connected to the tank 1.

[0033] Several ultrasonic generators 16 and an automatic descaling device 8 with driving and transmission components are fixedly installed on the outside of the housing 1. A scraper fixing frame 10 is provided inside the housing 1, on which multiple sets of scrapers 9 are provided. Each set of scrapers 9 corresponds to a cathode plate 6. The transmission component of the automatic descaling device 8 passes through the housing 1 from the top and is fixedly connected to the scraper fixing frame 10. The automatic descaling device 8 is used to drive the scraper fixing frame 10 to make the scrapers 9 reciprocate along the surface of the cathode plate 6, and the blade movement range of the scrapers 9 covers the entire surface of the cathode plate 6. At the same time, both ultrasonic waves and scrapers are used. The ultrasonic waves can generate acoustic vibration and acoustic fatigue on the scale layer, which accelerates the removal of the scale layer. At this time, the scrapers work together with mechanical action to scrape off the scale layer, which can greatly improve the descaling efficiency.

[0034] The lower part of the housing 1, below the cathode plate 6 and the anode plate 7, is provided with a scale storage tank 11, the lower end of which is connected to a drain pipe 12 and equipped with a drain solenoid valve 13.

[0035] For reference, the driving component of the automatic descaling device 8 can be a cylinder, and the transmission component can be a connecting rod, such as... Figure 3 As shown, the cylinder connecting rod is set vertically, which can drive the scraper 9 to move up and down reciprocally; the drive component and transmission component can also adopt other structures, such as motor gear and rack, motor and cam, motor lead screw, etc., as long as they can enable the scraper 9 to move along the cathode plate 6; the automatic descaling device 8 can be installed on the top of the box 1, or it can be fixed in any position after being connected by more complex transmission mechanisms, which can be set according to the actual installation space requirements.

[0036] Of course, if the weight sensor 15 cannot accurately weigh the material in actual operation, the reason may be that the scraper 9 on the scraper holder 10 is too tight, causing the cathode plate 6 to be clamped and thus unable to weigh the material. In this case, the tightness of the scraper 9 can be simply adjusted, or a simple structure can be set up so that the scrapers 9 on both sides of the cathode plate 6 can leave the surface of the cathode plate 6 when not in operation. For example, an electric clamping mechanism can be used, or the scraper holder 10 can be connected in two parts. The scrapers 9 on both sides of the cathode plate 6 can be fixed on the two parts respectively. When the scraper 9 needs to contact the surface of the cathode plate 6, the two parts can be moved by the drive device, thereby moving the scrapers 9 on both sides of the cathode plate 6 closer and until they contact the cathode plate 6.

[0037] To achieve automated operation, various existing technical solutions can be used to program and control the valves, power supplies, and other equipment. Typically, a memory and a processor are required. The memory can include random access memory (RAM) or non-volatile memory (NVM), such as at least one disk storage device. Optionally, the memory can also be at least one storage device located remotely from the aforementioned processor. The processor can be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it can also be a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components.

[0038] In a preferred embodiment, the above-mentioned treatment device further includes a PLC automatic control system. The housing 1 is also equipped with a water hardness detector and a water alkalinity detector. The water hardness detector probe and the water alkalinity detector probe are respectively fixed below the liquid surface inside the housing 1. The power supply switches for the cathode plate 6 and the anode plate 7, the weight sensor 15, the water hardness detector, the water alkalinity detector, the inlet solenoid valve 3, the outlet solenoid valve 5, the drain solenoid valve 13, the drive component switch for the automatic descaling device 8, and the start / stop switch for the ultrasonic generator 16 are respectively connected to the PLC automatic control system. The PLC automatic control system can store preset water hardness range, water alkalinity range, and cathode plate weight range. Water alkalinity can more directly reflect the scaling tendency of water quality than hardness, while cathode plate weight can more directly reflect the operating status of the electrode plate. With richer detection methods, more precise control of water quality and equipment operating status can be achieved.

[0039] If the scale storage tank 11 is funnel-shaped to facilitate scale discharge, then a support frame should be fixed around the lower part of the tank 1 to support the tank 1. Figure 1 As shown.

[0040] See Figure 2 and 3 In a preferred embodiment, the inlet pipe 2 and the outlet pipe 4 are respectively vertically arranged on two opposite sides of the housing 1. The cathode plate 6 and the anode plate 7 are parallel and spaced apart in multiple (preferably two or more pairs). The cathode plate 6 is perpendicular to the inlet pipe 2. The ultrasonic generator 16 is provided in two sets, respectively fixed on two sides of the housing 1 perpendicular to the cathode plate 6.

[0041] The water inlet baffle 14 can be further configured as follows: it is set perpendicular to the water inlet direction, and several connecting rods are fixedly provided on its outer periphery for fixed connection with the box 1. There is a gap between the water inlet baffle 14 and the inner wall of the box 1, and its projection on the wall of the box 1 where the water inlet pipe 2 is located covers the opening of the water inlet pipe 2.

[0042] The following methods can be used for fully automated electrochemical circulating water treatment using the above-mentioned treatment device:

[0043] Open the outlet solenoid valve and the inlet solenoid valve, and close the drain solenoid valve. The circulating water will start circulating in the tank. The inlet baffle can eliminate the scouring of the scale layer on the cathode plate by the high flow rate of the inlet water.

[0044] The electrochemical treatment begins when the power supply to the cathode and anode plates is turned on. During the treatment process, cations such as calcium and magnesium ions in the circulating water accumulate on the surface of the cathode plate in the form of precipitates, while anions such as chloride and oxygen ions in the circulating water move toward the anode plate to generate strong oxidizing substances, which kill and decompose microorganisms and bacteria, thus purifying the circulating water.

[0045] After the electrochemical circulating water treatment device has been running for a period of time, when the hardness, alkalinity or cathode plate weight in the circulating water exceeds the preset range, the power supply to the outlet solenoid valve, inlet solenoid valve, cathode plate and anode plate is turned off, and the automatic descaling device and ultrasonic generator are turned on. For reference, the frequency of the ultrasonic generator should be set to 20-80kHz and the power density should be set to 0.01-0.04W / ml. The scraper moves back and forth along the surface of the cathode plate, and the scale layer attached to the cathode plate falls into the scale storage tank.

[0046] After running for a period of time (specifically, the weight of the cathode plates can be used as a criterion, for example, the average weight of all cathode plates is within ±1.05% of the self-weight of the cathode plates), turn off the automatic descaling device and the ultrasonic generator, and open the drain solenoid valve to discharge the scale.

[0047] After draining the scale from the tank, close the drain solenoid valve; repeat the above steps to achieve circulating operation.

[0048] In addition, in actual production, multiple fully automatic electrochemical circulating water treatment devices can be set up according to the circulating water volume and water quality index requirements. This device can also be used simultaneously with chemical reagent water quality stabilization to ensure the stable operation of the automatic descaling device of the electrochemical facility and clean the scale. It can also increase the concentration ratio of the circulating water system, reduce the amount of water added to the system and the amount of wastewater discharged, and achieve water conservation and emission reduction.

[0049] After a period of trial operation using the above devices and methods, the quality of the circulating water was good, and no scale was found to enter the water circulation system from the devices.

[0050] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope defined in the claims.

[0051] Any aspects of this invention not described in detail are well-known to those skilled in the art.

Claims

1. A fully automatic electrochemical circulating water treatment device, characterized in that: The enclosure includes a housing (1), with an inlet pipe (2) and an inlet solenoid valve (3) installed on the lower part of one side, and an outlet pipe (4) and an outlet solenoid valve (5) installed on the upper part of the other side. An inlet baffle (14) is fixedly installed at the end of the inlet pipe (2) inside the housing (1) to disperse the water flow direction towards the outer periphery of the inlet baffle (14). The housing (1) contains at least one cathode plate (6) and at least one anode plate (7), forming an electric field between them. The upper end of the cathode plate (6) is connected to the housing (1) through a weight sensor (15) for weighing the cathode plate (6) in real time. The anode plate (7) is fixedly connected to the housing (1). The outer side of the housing (1) is fixed with several ultrasonic generators (16) and an automatic descaling device (8) with drive components and transmission components. The inside of the housing (1) is provided with a scraper fixing frame (10) with multiple sets of scrapers (9) on it. Each set of scrapers (9) corresponds to each cathode plate (6). The transmission component of the automatic descaling device (8) passes through the inside of the housing (1) from the upper end and is fixedly connected to the scraper fixing frame (10). The automatic descaling device (8) is used to drive the scraper fixing frame (10) to make the scraper (9) move back and forth along the surface of the cathode plate (6), and the blade movement range of the scraper (9) covers the entire surface of the cathode plate (6). The lower part of the housing (1) is provided with a scale storage tank (11) below the cathode plate (6) and the anode plate (7). The lower end of the tank is connected to a drain pipe (12) and a drain solenoid valve (13) is installed. It also includes a PLC automatic control system. The housing (1) is also equipped with a water hardness tester and a water alkalinity tester. The water hardness test probe and the water alkalinity test probe are respectively fixed below the liquid surface inside the housing (1). The power supply switch of the cathode plate (6) and the anode plate (7), the weight sensor (15), the water hardness tester, the water alkalinity tester, the inlet solenoid valve (3), the outlet solenoid valve (5), the sewage discharge solenoid valve (13), the drive component switch of the automatic descaling device (8), and the start / stop switch of the ultrasonic generator (16) are respectively connected to the PLC automatic control system signal.

2. The fully automatic electrochemical circulating water treatment device according to claim 1, characterized in that: The scale storage tank (11) is funnel-shaped, and a support is fixed around the lower end of the box (1).

3. The fully automatic electrochemical circulating water treatment device according to claim 1, characterized in that: The inlet pipe (2) and outlet pipe (4) are respectively vertically arranged on two opposite sides of the box body (1). The cathode plate (6) and anode plate (7) are parallel and spaced apart. The cathode plate (6) is perpendicular to the inlet pipe (2). The ultrasonic generator (16) is provided in two sets, which are respectively fixed on two sides of the box body (1) perpendicular to the cathode plate (6).

4. The fully automatic electrochemical circulating water treatment device according to claim 1, characterized in that: The weight sensor (15) is a suspended weighing sensor or an S-type tension sensor.

5. The fully automatic electrochemical circulating water treatment device according to claim 1, characterized in that: The water inlet baffle (14) is set perpendicular to the water inlet direction. Several connecting rods are fixed on its outer periphery for fixed connection with the box (1). There is a gap between the water inlet baffle (14) and the inner wall of the box (1), and its projection on the wall of the box (1) where the water inlet pipe (2) is located covers the inlet of the water inlet pipe (2).

6. A fully automated electrochemical circulating water treatment method, employing the treatment device described in any one of claims 1 to 5, characterized in that, The specific steps include the following: Step 1: Open the outlet solenoid valve and the inlet solenoid valve, and close the drain solenoid valve. The circulating water will begin to circulate within the tank. Step 2: Turn on the power supply to the cathode and anode plates to begin the electrochemical treatment; Step 3: After the electrochemical circulating water treatment device has been running for a period of time, when the hardness, alkalinity or cathode plate weight in the circulating water exceeds the preset range, turn off the power supply to the outlet solenoid valve, inlet solenoid valve, cathode plate and anode plate, turn on the automatic descaling device and ultrasonic generator, and the scraper moves back and forth along the cathode plate surface, and the scale layer attached to the cathode plate falls into the scale storage tank. Step 4: After running for a period of time, turn off the automatic descaling device and the ultrasonic generator, and open the drain solenoid valve to drain the scale. Step 5: After draining the scale from the tank, close the drain solenoid valve; Repeat steps 1 to 5 to achieve a loop.

7. The fully automated electrochemical circulating water treatment method according to claim 6, characterized in that: In step 3, the ultrasonic generator has a frequency of 20–80 kHz and a power density of 0.01–0.04 W / ml.

8. The fully automated electrochemical circulating water treatment method according to claim 6, characterized in that: In step 4, the automatic descaling device and the ultrasonic generator are turned off, and the weight of the cathode plate is used as the criterion for judgment.

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