A circulating cooling water electrolysis device with descaling, dechlorination and automatic pollution discharge functions

Abstract

The utility model discloses a kind of electrolytic devices with descaling, dechlorination and automatic pollution discharge function, it is related to circulating cooling water processing technical field. Including reaction vessel, anode, slag scraping device, pollution control device and control system, reaction vessel is made of metal material, and formed with cylindrical internal chamber, the inner wall of reaction vessel is as the cathode of electrolytic descaling, and with the negative pole of external power supply connection, one end of anode is connected with the positive pole of external power supply, and the other end is inserted into the circulating cooling water of internal chamber, slag scraping device includes power element, driving rod and slag scraping knife, power element drives slag scraping knife to do rotating circumferential motion along the inner wall of reaction vessel by driving rod, control system is connected with control valve electric signal, for automatically controlling the opening and closing of control valve. The utility model can effectively remove calcium, magnesium ion and chlorine ion in circulating cooling water, prevent heat exchange equipment from scaling and corrosion, and is conducive to realizing near-zero emission of circulating cooling water system.

Description

Technical Field

[0001] This utility model relates to the field of circulating cooling water treatment technology, specifically a circulating cooling water electrolysis device with descaling, dechlorination and automatic sewage discharge functions. Background Technology

[0002] In circulating cooling water systems of industries such as power, petroleum, and chemicals, the presence of minerals such as calcium and magnesium in the water easily leads to scaling on the surfaces of heat exchange equipment, affecting heat exchange efficiency and equipment lifespan. Simultaneously, the accumulation of chloride ions in the circulating water exacerbates equipment corrosion. Traditional circulating water treatment methods are insufficient to effectively address both scaling and corrosion problems simultaneously and can easily cause wastewater pollution.

[0003] Among existing descaling technologies, chemical dosing methods easily cause secondary water pollution, physical descaling methods have limited effectiveness, and ordinary electrolysis devices suffer from incomplete descaling, low chloride ion removal rates, and low levels of automation. Therefore, there is a need for an electrolytic descaling device that can efficiently remove scale, reduce chloride ion content, and operate automatically. Utility Model Content

[0004] The purpose of this invention is to provide a circulating cooling water electrolysis device with descaling, dechlorination and automatic sewage discharge functions to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a circulating cooling water electrolysis device with descaling, dechlorination, and automatic sewage discharge functions, comprising a reaction vessel, an anode, a slag scraping device, a sewage discharge device, and a control system. The reaction vessel is made of metal and has a cylindrical internal chamber. The inner wall of the reaction vessel serves as the cathode for electrolytic descaling and is connected to the negative terminal of an external power supply. The anode is housed within the internal chamber of the reaction vessel, with one end connected to the positive terminal of the external power supply and the other end extending into the circulating cooling water within the internal chamber. The slag scraping device includes a power element, a drive rod, and a scraper blade. One end of the drive rod passes through… The power element is connected to the output end of the reaction vessel, and the other end is fixed to the scraper. The scraper is in contact with the inner wall of the reaction vessel. The power element drives the scraper to rotate in a circular motion along the inner wall of the reaction vessel through a drive rod, and the rotation trajectory of the scraper matches the shape of the inner wall of the reaction vessel. This is used to scrape the deposits on the inner wall of the reaction vessel to the bottom of the reaction vessel. The sewage discharge device includes a sewage discharge pipe and a control valve installed on the sewage discharge pipe. The sewage discharge pipe is installed at the bottom of the reaction vessel to collect the deposits scraped off at the bottom of the reaction vessel. The control system is electrically connected to the control valve to automatically control the opening and closing of the control valve.

[0006] Based on the above technical features, in the electrolysis process of circulating cooling water, the cylindrical reaction vessel serves as the cathode, and a high concentration of hydroxide ions (OH-) is formed near its inner wall. - This process causes easily scale-forming minerals such as calcium and magnesium to pre-form scale and precipitate from the water, forming scale such as Ca(OH)2, CaCO3, and CaSO4, which adhere to the inner wall of the reaction vessel. A power element drives a scraper to remove the scale from the inner wall, and a control valve is periodically opened by the control system to completely discharge the scale through the drain pipe. An oxidation reaction occurs at the anode, removing chloride ions (Cl-) from the water. - The chloride ion content in the water is reduced by converting the chloride ion into chlorine gas (Cl2) and discharging it to the outside of the reaction vessel. The circulating cooling water electrolysis device in this invention uses electrolysis to pre-deposit and remove scale, effectively preventing scale buildup on heat exchange equipment in the circulating cooling water system. Simultaneously, it reduces the chloride ion content in the water, mitigating equipment corrosion. Furthermore, the control system can automatically open the control valve periodically according to a preset program to discharge the deposits, achieving automated operation, reducing manual maintenance, and eliminating the need for large amounts of chemical reagents, thus reducing secondary pollution and facilitating near-zero discharge of circulating cooling water.

[0007] Preferably, in this technical solution, the circulating cooling water electrolysis device further includes a negative pressure suction device. The internal chamber is divided into a water storage chamber and a degassing chamber. The water storage chamber is located below the reaction vessel and is used to store circulating cooling water. The degassing chamber is located above the reaction vessel and is used to collect chlorine gas generated during the electrolysis process. The negative pressure suction device is connected to the degassing chamber through a pipe. The negative pressure suction device is used to maintain the degassing chamber under negative pressure to accelerate the precipitation of chlorine gas from the water and its removal.

[0008] Based on the above technical features, the negative pressure suction device is connected to the degassing chamber, which can put the degassing chamber in a negative pressure state, improve the chlorine gas release efficiency, and enhance the chlorine ion removal effect.

[0009] Preferably, in this technical solution, the anode is a titanium-based three-dimensional mesh structure, and its surface is coated with a variety of noble metal coatings. More preferably, the coated noble metals include at least two of ruthenium, iridium, and platinum.

[0010] Based on the above technical features, using a titanium-based three-dimensional mesh structure as the anode can increase the effective oxidation reaction area. At the same time, combined with the coating of noble metals, it can significantly improve the electrolysis efficiency and the service life of the anode.

[0011] Preferably, in this technical solution, the top of the reaction vessel is provided with an opening, and the opening is located at the center of the top of the reaction vessel. One end of the drive rod passes through the opening and is connected to the output end of the power element.

[0012] Based on the above technical features, the drive rod is connected to the output end of the power element through the central opening at the top of the cylindrical reaction vessel. The scraper is fixed to the end of the drive rod and rotates with the drive rod to make a circular motion along the cylindrical inner wall of the reaction vessel, ensuring effective removal of pre-deposited water channels and other sediments.

[0013] In this preferred embodiment, the bottom of the reaction vessel is provided with a slag discharge port, which is connected to the sewage discharge pipe.

[0014] Preferably, in this technical solution, the power element is electrically connected to the control system, and the control system can automatically control the starting and stopping of the power element. More preferably, the power element is a servo motor or a cylinder.

[0015] Based on the above technical features, the control system of this utility model can periodically control the servo motor or cylinder to drive the scraper to remove the deposits on the inner wall of the container according to the preset program, and open the control valve to discharge the deposits, thereby realizing automated operation and reducing manual maintenance.

[0016] Preferably, in this technical solution, the reaction vessel is made of carbon steel.

[0017] In this technical solution, preferably, the control system is a PLC controller. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the circulating cooling water electrolysis device in the embodiment of this utility model.

[0019] In the diagram: 1. Reaction vessel; 11. Water storage chamber; 12. Degassing chamber; 2. Anode; 3. Slag scraper; 4. Power component; 5. Drive rod; 6. Control valve; 7. Drain pipe; 8. Negative pressure suction device. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] It should be noted that in the description of this utility model, the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0022] Furthermore, it should be understood that, for ease of description, the dimensions of the various components shown in the accompanying drawings are not drawn to actual scale.

[0023] like Figure 1 As shown, this utility model provides a technical solution: a circulating cooling water electrolysis device with descaling, dechlorination, and automatic sewage discharge functions, including a reaction vessel 1, an anode 2, a slag scraping device, a sewage discharge device, and a control system. The reaction vessel 1 is made of metal and has a cylindrical internal chamber. The inner wall of the reaction vessel 1 serves as the cathode for electrolytic descaling and is connected to the negative terminal of an external power supply. The anode 2 is housed in the internal chamber of the reaction vessel 1, with one end connected to the positive terminal of the external power supply and the other end extending into the circulating cooling water within the internal chamber. The slag scraping device includes a power element 4, a drive rod 5, and a scraper blade 3. One end of the drive rod 5 passes through the reaction vessel 1 and is connected to the output end of the power element 4, while the other end is fixed to the scraper blade 3. The scraper blade 3 is in contact with the inner wall of the reaction vessel 1. The power element 4 drives the scraper blade 3 to rotate in a circular motion along the inner wall of the reaction vessel 1 via the drive rod 5, and the rotational trajectory of the scraper blade 3 matches the shape of the inner wall of the reaction vessel 1, used to scrape the deposits on the inner wall of the reaction vessel 1 to the bottom of the reaction vessel 1. The sludge removal device includes a sludge pipe 7 and a control valve 6 installed on the sludge pipe 7. The sludge pipe 7 is installed at the bottom of the reaction vessel 1 and is used to collect the deposits scraped off the bottom of the reaction vessel 1. The control system is electrically connected to the control valve 6 for automatically controlling the opening and closing of the control valve 6.

[0024] In the circulating cooling water electrolysis device of this invention, during the electrolysis of circulating cooling water, the cylindrical reaction vessel 1 serves as the cathode, and a high concentration of hydroxide ions (OH-) is formed near its inner wall. - This process causes easily scale-forming minerals such as calcium and magnesium to pre-form scale and precipitate from the water, forming scale such as Ca(OH)2, CaCO3, and CaSO4, which adhere to the inner wall of the reaction vessel 1. The power element 4 drives the scraper 3 to scrape and clean the scale adhering to the inner wall, and the control valve 6 is opened periodically by the control system to completely discharge the scale through the drain pipe 7. An oxidation reaction occurs at the anode 2, which removes chloride ions (Cl-) from the water. -The chloride ion content in the water is reduced by converting the chloride ion into chlorine gas (Cl2) and discharging it to the outside of the reaction vessel 1. The circulating cooling water electrolysis device uses electrolysis to pre-deposit and remove scale, effectively preventing scale formation on heat exchange equipment in the circulating cooling water system, and simultaneously reducing the chloride ion content in the water, thus mitigating equipment corrosion. Furthermore, the control system can automatically open control valve 6 periodically according to a preset program to discharge the deposits, achieving automated operation, reducing manual maintenance, and eliminating the need for large amounts of chemical reagents, thus reducing secondary pollution and facilitating near-zero discharge of circulating cooling water.

[0025] Furthermore, such as Figure 1 As shown, the internal chamber is divided into a water storage chamber 11 and a degassing chamber 12. In this utility model, the water storage chamber 11 and the degassing chamber 12 are separated by the water surface of the circulating cooling water. The water storage chamber 11 is located below the water surface of the circulating cooling water in the reaction vessel 1 and is used to store the circulating cooling water. The degassing chamber 12 is located above the water surface of the circulating cooling water in the reaction vessel 1 and is used to collect the chlorine gas generated during the electrolysis process.

[0026] The circulating cooling water electrolysis device also includes a negative pressure suction device 8, which is connected to the degassing chamber 12 via a pipe. The negative pressure suction device 8 is used to keep the degassing chamber 12 under negative pressure, thereby accelerating the precipitation of chlorine from the water and its removal.

[0027] Specifically, anode 2 is a titanium-based three-dimensional mesh structure, and its surface is coated with various noble metal coatings. Preferably, the coated noble metals include at least two of ruthenium, iridium, and platinum. In this invention, using a titanium-based three-dimensional mesh structure as the anode can increase the effective oxidation reaction area. Furthermore, combined with the coated noble metal coating, it can significantly improve electrolysis efficiency and the service life of anode 2.

[0028] Furthermore, the top of the reaction vessel 1 has an opening located at the center of the top of the reaction vessel 1. One end of the drive rod 5 passes through the opening and is connected to the output end of the power element 4. The drive rod 5 is connected to the output end of the power element 4 through the central opening at the top of the cylindrical reaction vessel 1. The scraper 3 is fixed to the end of the drive rod 5 and rotates with the drive rod 5 to move in a circular motion along the cylindrical inner wall of the reaction vessel 1, ensuring effective removal of pre-deposited water channels and other sediments. The bottom of the reaction vessel 1 has a slag discharge port, which is connected to the drain pipe 7. A control valve 6 is installed on the drain pipe 7, and the control valve 6 is activated by the control system to completely discharge the scale along the drain pipe 7 to the outside of the reaction vessel 1.

[0029] like Figure 1 As shown, the power element 4 is a servo motor, but in other embodiments, the power element 4 can also be other power drive components, such as cylinders, hydraulic cylinders, etc.

[0030] Furthermore, the power element 4 is electrically connected to the control system, allowing the control system to automatically control the opening and closing of the power element 4. In this invention, the control system can periodically control a servo motor or cylinder to drive the scraper 3 to remove deposits from the inner wall of the reaction vessel 1 according to a preset program, and open the control valve 6 to discharge the deposits, achieving automated operation and reducing manual maintenance. Preferably, the above control system can be a PLC controller.

[0031] The reaction vessel 1 is made of carbon steel. The cost of carbon steel is not only significantly lower than that of other precious metals (such as copper and titanium), making it suitable for large-scale industrial applications, but it can also efficiently conduct current to meet the high current density requirements of the electrolysis process.

[0032] The external power supply is preferably a pulsed DC power supply. This pulsed DC power supply can be configured with a critical electrode spacing pulsed DC electric field based on water conductivity and the target substances to be removed. It utilizes the electrochemical properties of water and its minerals to regulate the reduction of minerals and acid radicals in the water through electrolytic adsorption and precipitation. Furthermore, by monitoring parameters such as hardness and chloride ion concentration in the circulating cooling water online, the parameters of the pulsed DC power supply and the sludge scraping and discharge cycle are adjusted to ensure stable descaling performance.

[0033] The specific electrolysis process is as follows: By applying a pulsed DC electric field to the cathode (inner wall of reaction vessel 1) and anode 2, a reduction reaction occurs at the cathode, creating a high hydroxide ion concentration environment near the cathode (i.e., a strongly alkaline environment is formed near the cathode), causing calcium and magnesium ions in the water to form scale pre-deposited on the inner wall surface of the container, which continuously grows as electrolysis proceeds. An oxidation reaction occurs at anode 2, oxidizing chloride ions in the cooling water into chlorine gas. The negative pressure suction device 8 keeps the degassing chamber 12 under negative pressure, accelerating the precipitation of chlorine gas from the water and its removal.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A circulating cooling water electrolysis device with descaling, dechlorination and automatic sewage discharge functions, characterized in that, include: The reaction vessel (1) is made of metal material and has a cylindrical internal chamber. The inner wall of the reaction vessel (1) serves as the cathode for electrolytic descaling and is connected to the negative terminal of an external power source. Anode (2), the anode (2) is housed in the internal chamber of the reaction vessel (1), one end of the anode (2) is connected to the positive terminal of an external power source, and the other end extends into the circulating cooling water in the internal chamber; The slag scraping device includes a power element (4), a drive rod (5), and a slag scraper (3). One end of the drive rod (5) passes through the reaction vessel (1) and is connected to the output end of the power element (4). The other end is fixed to the slag scraper (3). The slag scraper (3) is in contact with the inner wall of the reaction vessel (1). The power element (4) drives the slag scraper (3) to rotate in a circular motion along the inner wall of the reaction vessel (1) through the drive rod (5). The rotation trajectory of the slag scraper (3) matches the shape of the inner wall of the reaction vessel (1) and is used to scrape the deposits on the inner wall of the reaction vessel (1) to the bottom of the reaction vessel (1). The sewage discharge device includes a sewage pipe (7) and a control valve (6) installed on the sewage pipe (7). The sewage pipe (7) is installed at the bottom of the reaction vessel (1) and is used to collect the sediment scraped off the bottom of the reaction vessel (1). The control system is electrically connected to the control valve (6) and is used to automatically control the opening and closing of the control valve (6).

2. The circulating cooling water electrolysis device according to claim 1, characterized in that, It also includes a negative pressure suction device (8); wherein, The internal chamber is divided into a water storage chamber (11) and a degassing chamber (12). The water storage chamber (11) is located below the reaction vessel (1) and is used to store circulating cooling water. The degassing chamber (12) is located above the reaction vessel (1) and is used to collect chlorine gas generated during electrolysis. The negative pressure suction device (8) is connected to the degassing chamber (12) through a pipe. The negative pressure suction device (8) is used to keep the degassing chamber (12) under negative pressure to accelerate the precipitation of chlorine from the water and its removal.

3. The circulating cooling water electrolysis device according to claim 1, characterized in that, The anode (2) is a titanium-based three-dimensional mesh structure and its surface is coated with a variety of noble metal coatings.

4. The circulating cooling water electrolysis device according to claim 3, characterized in that, The coated precious metals include at least two of ruthenium, iridium, and platinum.

5. The circulating cooling water electrolysis device according to claim 1, characterized in that, The top of the reaction vessel (1) is provided with an opening, and the opening is located at the center of the top of the reaction vessel (1). One end of the drive rod (5) passes through the opening and is connected to the output end of the power element (4).

6. The circulating cooling water electrolysis device according to claim 1, characterized in that, The bottom of the reaction vessel (1) is provided with a slag discharge port, which is connected to the sewage pipe (7).

7. The circulating cooling water electrolysis device according to claim 1, characterized in that, The power element (4) is electrically connected to the control system, and the control system can automatically control the opening and closing of the power element (4).

8. The circulating cooling water electrolysis device according to claim 7, characterized in that, The power element (4) is a servo motor or a cylinder.

9. The circulating cooling water electrolysis device according to claim 1, characterized in that, The reaction vessel (1) is made of carbon steel.

10. The circulating cooling water electrolysis apparatus according to any one of claims 1 to 9, characterized in that, The control system is a PLC controller.

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