A horizontal fully automatic pressure-bearing electrochemical water treatment device and method

Abstract

The invention discloses a horizontal fully automatic pressure-bearing electrochemical water treatment device and method, comprising: a reaction tank, in which a plurality of cathode plates and a plurality of anode plates are arranged, the anode plates and the cathode plates are arranged at intervals, and scraping devices are arranged on the two sides of each cathode plate; a water collector, arranged above the reaction tank, on which a plurality of water collecting pipes are arranged, the water collecting pipes are distributed above the two ends of the cathode plates, and each cathode plate corresponds to the water collecting ports of two water collecting pipes; a sewage hopper, arranged below the reaction tank and connected to the reaction tank, the cross-section of the sewage hopper is an inverted trapezoid, and a sewage outlet and a water inlet are arranged at the bottom of the sewage hopper; the invention arranges the water collector at the upper part of the reaction tank to force the wastewater to be treated entering the reaction tank to be evenly distributed in each reaction chamber, thereby improving the wastewater treatment efficiency, and arranges the sewage hopper at the lower part of the reaction tank to provide the electrolytic cell with wastewater with stable water quality and water quantity, thereby further improving the wastewater treatment effect.

Description

Technical Field

[0001] The invention relates to the field of electrochemical water treatment, and in particular to a horizontal fully automatic pressure-bearing electrochemical water treatment device and method. Background Art

[0002] The information disclosed in this background technology section is only intended to enhance the understanding of the overall background of the invention, and should not necessarily be regarded as an admission or any form of suggestion that the information constitutes the prior art already known to a person skilled in the art.

[0003] Wastewater electrolysis treatment refers to a method of applying the mechanism of electrolysis to convert harmful substances in the original wastewater into harmless substances through oxidation and reduction reactions at the positive and negative electrodes respectively through the electrolysis process to achieve wastewater purification. The electrolytic cell is equipped with plates, which are generally made of ordinary steel plates. The electrolytic cell is divided into unipolar and bipolar types according to the way the plates are connected to the power supply. After power is turned on, under the action of the external electric field, acidic substances such as Cl2 and H2O2 are generated near the anode, making the area near the anode an acidic area, while CO3 is generated near the cathode. 2- and OH - , making the area near the cathode an alkaline area. When calcium and magnesium ions pass through this alkaline area, they will quickly generate scale precipitates such as calcium carbonate, magnesium carbonate, and magnesium hydroxide, and some slime will be adsorbed on the cathode, causing calcium and magnesium ions to form solid precipitation.

[0004] The existing electrochemical treatment device uses a scraper to scrape off the scale on the cathode plate when treating scale, and at the same time performs backwashing to remove scale and discharge the mud-water mixture. This requires a large amount of water resources, resulting in waste. The mud-water mixture also requires a sedimentation tank to be built for sedimentation, which increases the cost. In addition, the height of the drain pipe of the existing electrochemical device on the water tank is fixed. After the liquid level in the water tank exceeds the position of the drain pipe, the water in the water tank will be discharged from the drain pipe, which results in the presence of water that has not been electrochemically treated in the water discharged from the drain pipe, affecting the effect of sewage treatment. Summary of the invention

[0005] In view of the problems existing in the prior art, the present invention provides a horizontal fully automatic pressure-bearing electrochemical water treatment device and method, which can improve the wastewater treatment efficiency and reduce the waste of water resources.

[0006] The technical solution of the present invention is as follows:

[0007] In a first aspect of the present invention, there is provided a horizontal fully automatic pressure-bearing electrochemical water treatment device, comprising:

[0008] A reaction tank is provided with a plurality of cathode plates and a plurality of anode plates, the anode plates and the cathode plates are arranged at intervals, and a scraping device is arranged on two sides of each cathode plate;

[0009] A water collector is arranged above the upper cover plate of the reaction tank, and a plurality of water collecting pipes are arranged on the water collector. The water collecting pipes are distributed above the two ends of the cathode plate, and each cathode plate corresponds to the water collecting ports of two water collecting pipes;

[0010] The gas storage tank is arranged above the inside of the reaction tank, and the water collecting pipe extends downward from the upper cover plate to form a chamber for storing electrolytic waste gas in the reaction tank. The stored waste gas is discharged by the automatic exhaust valve;

[0011] The sewage hopper is arranged below the reaction tank and communicated with the reaction tank. The cross section of the sewage hopper is an inverted trapezoid. A sewage outlet and a water inlet are arranged at the bottom of the sewage hopper.

[0012] In some embodiments of the present invention, the scraping device includes a plurality of scraper groups, each scraper group includes two scrapers arranged opposite to each other, a cathode plate is located between the two scrapers of each scraper group, and the two scrapers are in contact with the wall surface of the cathode plate.

[0013] In some embodiments of the present invention, the scraper group is provided in two layers, one above the other, and is connected in series via a scraper series shaft.

[0014] In some embodiments of the present invention, both ends of the scraper device are connected to a hydraulic cylinder, and driven by the hydraulic cylinder, the scraper moves up and down along the wall of the cathode plate.

[0015] In some embodiments of the present invention, a water outlet is provided on the water collector, and a water outlet electric valve is installed at the water outlet.

[0016] In some embodiments of the present invention, two exhaust ports are provided on the upper cover plate of the reaction tank, and automatic exhaust valves are installed at the exhaust ports.

[0017] In some embodiments of the present invention, a sewage electric valve is provided at the sewage outlet.

[0018] In some embodiments of the present invention, the water inlet is connected to a water inlet pipe, on which a water inlet electric valve is arranged, and the water inlet pipe is arranged in parallel with a drainage pipe, on which a drainage electric valve is arranged.

[0019] In some embodiments of the present invention, a water quality detector is also provided on the water outlet pipe of the water collector, and the water quality detector is connected to the controller.

[0020] In a second aspect of the present invention, there is provided an electrochemical water treatment method, comprising the following steps:

[0021] Open the water inlet electric valve, the wastewater first enters the sewage hopper for buffering, and then enters the plate reaction area of ​​the reaction tank;

[0022] Under the action of the water collector, the water flow is forced to be evenly distributed to each reaction chamber in the reaction tank;

[0023] The treated wastewater is discharged from the outlet of the water collector;

[0024] Close the water inlet and outlet electric valves, open the drainage electric valve, and the drainage is completed;

[0025] Open the sewage electric valve, drive the scraper device through the hydraulic cylinder, and discharge various impurities to the outside of the device through the sewage bucket;

[0026] Furthermore, the controller is included to control the opening and closing of the water inlet electric valve and the water outlet electric valve according to the detection result of the water quality detector.

[0027] One or more technical solutions of the present invention have the following beneficial effects:

[0028] (1) The horizontal fully automatic pressure-bearing electrochemical water treatment device of the present invention has a water collector disposed at the upper cover plate of the reaction tank, and the water collecting pipe of the water collector is disposed corresponding to the cathode plate in the reaction tank. The water collecting pipe extends into the interior of the reaction tank, and an air storage bin is formed at the upper part of the reaction tank. The exhaust valve on the top of the cover plate discharges the waste gas in the reaction process, so that the wastewater to be treated passes through the alkaline area of ​​the cathode plate. The calcium and magnesium ions in the wastewater generate scale precipitates such as calcium carbonate, magnesium carbonate, and magnesium hydroxide, and part of the sludge is adsorbed on the cathode, thereby achieving the treatment of the wastewater and improving the wastewater treatment efficiency.

[0029] (2) The horizontal fully automatic pressure-bearing electrochemical water treatment device of the present invention has a sewage hopper arranged at the lower part of the reaction tank. The sewage hopper can not only discharge sewage, but also allow the wastewater to be treated to enter the sewage hopper for buffering before entering the electrolytic tank for electrochemical treatment, thereby providing the electrolytic tank with wastewater with stable water quality and water quantity, which is beneficial to improving the wastewater treatment effect.

[0030] (3) The horizontal fully automatic pressure-bearing electrochemical water treatment device of the present invention is provided with a scraping device, which is driven by a hydraulic cylinder to discharge various impurities to the outside of the device through a sewage hopper, thereby realizing automatic descaling of the cathode plate.

[0031] (4) The electrochemical water treatment method of the present invention can achieve scale scraping after drainage and water backwashing after scale removal due to the special design of the electrochemical treatment device structure, thereby reducing the waste of water resources. The impurities discharged by water backwashing have a small water content and do not require additional equipment for further treatment, thereby reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a front view of the horizontal fully automatic pressure-bearing electrochemical water treatment device of the present invention;

[0033] Figure 2 It is a side view of the horizontal fully automatic pressure-bearing electrochemical water treatment device of the present invention;

[0034] Figure 3 A top view of the horizontal fully automatic pressure-bearing electrochemical water treatment device of the present invention;

[0035] Figure 4 It is a schematic diagram of the positions of the water collector and the cathode plate of the present invention;

[0036] Figure 5 It is a schematic diagram of the hydraulic cylinder and the scraping device of the present invention;

[0037] Figure 6 It is a schematic diagram of the cathode plate and the scraping device of the present invention.

[0038] In the figure: 1. reaction tank; 2. sewage hopper; 3. water collector; 31. water collecting pipe; 4. water outlet electric valve; 5. hydraulic cylinder; 6. cathode plate; 7. drainage electric valve; 8. water inlet electric valve; 9. sewage discharge electric valve; 10. anode plate; 11. scraper device; 12. equipment room; 13. control cabinet; 14. automatic exhaust valve. DETAILED DESCRIPTION

[0039] The present invention will be described below in conjunction with the accompanying drawings.

[0040] Example 1

[0041] In a typical embodiment of the present invention, Figure 1-4 As shown, a horizontal fully automatic pressure-bearing electrochemical water treatment device is proposed, including a reaction tank 1, a sewage hopper 2 and a water collector 3, wherein the water collector 3 is arranged above the reaction tank 1, and the sewage hopper 2 is arranged below the reaction tank.

[0042] The reaction tank 1 is a closed box structure, which is used for electrochemical treatment of wastewater. A plurality of cathode plates 6 and a plurality of anode plates 10 are arranged inside the reaction tank 1. The cathode plates and the anode plates are arranged vertically inside the reaction tank 1 in the vertical direction. The anode plates 10 and the cathode plates 6 are arranged at intervals, that is, an anode plate is arranged between every two cathode plates, and an anode plate is arranged between every two anode plates, and the number of cathode plates and anode plates is adapted to each other; scraping devices 11 are arranged on both sides of the cathode plates.

[0043] The structure of the scraping device 11 is as follows: Figure 5 and Figure 6As shown, the scraper device includes a plurality of scraper groups, each scraper group is two scrapers arranged opposite to each other, a cathode plate is placed between the two scrapers of each scraper group, and the two scrapers are in contact with the wall surface of the cathode plate, that is, the blades of the two scrapers of the scraper group are facing the walls on both sides of the cathode plate, and the number of scraper groups corresponds to the number of cathode plates; further, the scraper group is arranged in two layers, upper and lower, and is connected in series through a scraper series shaft, and the left and right ends of the scraper device are connected to the hydraulic cylinder, and under the drive of the hydraulic cylinder, the scraper moves up and down along the wall surface of the cathode plate to scrape off the dirt on the two walls of the cathode plate; by arranging the scraper group into two layers, the dirt on the cathode plate can be scraped off for a second time, thereby improving the descaling efficiency.

[0044] In this embodiment, the scraper is made of high manganese steel or tungsten carbide-based hard alloy. High manganese steel is a typical wear-resistant steel with good wear resistance and can still fit the cathode plate after long-term use.

[0045] The water collector 3 is used to discharge the water that has completed the electrochemical treatment in the reaction tank 1 out of the reaction tank 1. A plurality of water collecting pipes 31 are arranged on the water collector. The water collecting pipes pass through the cover plate of the reaction tank and extend into the interior of the reaction tank. The water collecting pipes are distributed above the two ends of the cathode plate. Each cathode plate corresponds to the water collecting ports of two water collecting pipes. Under the action of the water collector, the wastewater to be treated entering the reaction tank is forced to be evenly distributed in each reaction chamber, thereby increasing the electrode reaction time and improving the wastewater treatment efficiency. A water outlet is arranged on the water collector, and a water outlet electric valve 4 is installed at the water outlet to discharge the treated water collected in the water collector.

[0046] Since the existing electrochemical device only has one drain pipe on the reaction tank, the water in the reaction tank is discharged through the drain pipe. The height of the drain pipe on the water tank is fixed. After the liquid level in the water tank exceeds the position of the drain pipe, the water in the water tank will be discharged from the drain pipe, resulting in the possibility that the wastewater is directly discharged from the reaction tank without passing through the alkaline area of ​​the cathode plate. The discharged water may be a mixture of treated water and wastewater to be treated, resulting in poor wastewater treatment effect. By setting a water collector, the water collecting pipe of the water collector corresponds to the wastewater treated by the cathode plate to collect the wastewater to be treated, so that the wastewater to be treated passes through the alkaline area of ​​the cathode plate, and the calcium and magnesium ions in the wastewater generate scale precipitates such as calcium carbonate, magnesium carbonate, magnesium hydroxide, and some sludge are adsorbed on the cathode, thereby realizing the treatment of the wastewater and improving the wastewater treatment efficiency.

[0047] In this embodiment, the gas storage chamber is arranged above the interior of the reaction tank, and the water collecting pipe extends downward from the upper cover plate to form a chamber in the reaction tank for storing electrolytic waste gas. The stored waste gas is discharged by the automatic exhaust valve 14. Specifically, two exhaust ports are arranged on the upper cover plate of the reaction tank, and the automatic exhaust valve 14 is installed at the exhaust port to discharge the waste gas generated by electrolysis.

[0048] A sewage hopper 2 is arranged below the reaction tank and is connected to the reaction tank. The cross-section of the sewage hopper 2 is an inverted trapezoid. A sewage outlet and a water inlet are arranged at the bottom of the sewage hopper. A sewage electric valve 9 is arranged at the sewage outlet. The scraping device scrapes the dirt on the cathode plate under the drive of the hydraulic cylinder, and the dirt falls into the sewage hopper. The dirt is discharged from the sewage hopper by opening the sewage electric valve; the water inlet is connected to the water inlet pipe, and a water inlet electric valve 10 is arranged on the water inlet pipe. The water inlet pipe is arranged in parallel with the drainage pipe, and a drainage electric valve 7 is arranged on the drainage pipe; the water inlet is also used as a drainage port. When the water inlet electric valve is opened and the drainage electric valve is closed, the wastewater can enter the sewage hopper and then enter the reaction tank for electrochemical treatment. When the drainage electric valve is opened and the water inlet electric valve is closed, the water in the sewage hopper can be discharged.

[0049] By setting the cross-section of the sewage hopper into an inverted trapezoid, it is beneficial to discharge dirt from the sewage outlet at the bottom of the sewage hopper. The sewage hopper can not only discharge sewage, but also allow the wastewater to be treated to enter the sewage hopper for buffering first, and then enter the electrolytic cell for electrochemical treatment. Since wastewater is unstable, the water quality and water volume of wastewater generated by different processes vary greatly. The setting of the sewage hopper provides a buffer space for the wastewater, so that the water quality and water volume entering the electrolytic cell are stable, which is beneficial to improving the wastewater treatment effect.

[0050] In this embodiment, the electrochemical water treatment device is also provided with an equipment room 12 and a control cabinet 13, and the opening and closing of the water inlet electric valve, the water outlet electric valve, the drain electric valve, and the sewage electric valve are controlled by the controller in the control cabinet; at the same time, when the amount of dirt attached to the cathode plate is large, the hydraulic cylinder is controlled to drive the scraping device to move up and down along the wall of the cathode plate to scrape off the dirt on the cathode plate. The S485 and WIFI wireless interfaces are arranged in the control cabinet, which can realize remote operation and real-time data monitoring of the wireless terminal. The electrochemical water treatment device can realize fully automatic operation.

[0051] A water quality detector is also provided on the outlet pipe of the water collector, and the water quality detector is connected to the controller. A water quality detection module is provided in the water quality detector, and the water quality detection module includes any one or a combination of a pH sensor, a turbidity sensor, a conductivity sensor, and a dissolved oxygen sensor, wherein the pH sensor is used to detect the pH value of drinking water, the turbidity sensor is used to detect the turbidity of drinking water, the conductivity sensor is used to detect the conductivity of drinking water, and the dissolved oxygen sensor is used to detect the oxygen content of drinking water. The water quality detector transmits the signal of the detected water quality information to the controller, and the controller sets the thresholds of pH value, turbidity, conductivity, and oxygen content. The controller compares the detected water quality information with the set thresholds, and controls the water inlet electric valve and the water outlet electric valve according to the comparison results.

[0052] In this embodiment, the entire device is sealed and can withstand more than 0.2MP.

[0053] The operation process of the electrochemical treatment device of this embodiment is as follows:

[0054] When the device is running, the water flow adopts a low-in and high-out operation mode. The water enters the sewage hopper 2 through the water inlet electric valve 8 at the bottom of the device to buffer the water inlet, and then enters the electrode plate reaction area of ​​the reaction tank 1. Under the action of the water collector 3, the water flow is forced to be evenly distributed to each reaction chamber in the reaction tank 1, increasing the electrode reaction time and the processing efficiency, and finally flows out from the water outlet on the water collector. When the water flows through the reaction tank, under the action of the current, the calcium and magnesium ions will be reduced to the cathode plate. When a certain amount of water is attached, it is controlled by PLC: the water inlet electric valve 8 and the water outlet electric valve 4 are closed, the drainage electric valve 7 is opened, and the drainage electric valve 9 is opened after the drainage is completed. The hydraulic cylinder 5 drives the scraping device 11 to discharge various impurities through the sewage hopper 2 to the outside of the device. There is no need for backwashing and sedimentation treatment. The sewage is automatically reset after the sewage is discharged and automatically runs according to the set program.

[0055] During the operation of the device, the water quality detector on the water collector outlet pipe monitors in real time and transmits the water quality information signal to the controller. When the detected pH value, turbidity, conductivity, and oxygen content exceed the set threshold, the controller controls the water outlet electric valve and the water inlet electric valve to close to increase the water treatment time in the reaction tank. When the detected pH value, turbidity, conductivity, and oxygen content are less than or equal to the set threshold, the controller controls the water outlet electric valve and the water inlet electric valve to open to continue the water intake and drainage process.

[0056] Example 2

[0057] In a typical embodiment of the present invention, an electrochemical water treatment method is provided, comprising the following steps:

[0058] Open the water inlet electric valve, the wastewater first enters the sewage hopper for buffering, and then enters the plate reaction area of ​​the reaction tank;

[0059] Under the action of the water collector, the water flow is forced to be evenly distributed to each reaction chamber in the device;

[0060] The treated wastewater is discharged from the outlet of the water collector;

[0061] Close the water inlet and outlet electric valves, open the drainage electric valve, and the drainage is completed;

[0062] Open the sewage electric valve, drive the scraper device through the hydraulic cylinder, and discharge various impurities to the outside of the device through the sewage bucket;

[0063] Furthermore, the controller is included to control the opening and closing of the water inlet electric valve and the water outlet electric valve according to the detection result of the water quality detector.

[0064] The existing equipment does not drain water when scraping scale, but uses the water in the equipment to backwash and descale. What is discharged is a mixture of mud and water, and the proportion of water is 5-10 times that of the impurities to be removed. The mud and water mixture needs to be precipitated in a sedimentation tank. The sedimentation tank also needs a drainage pump, and the impurities at the bottom of the tank need to be cleaned in time, which is time-consuming and labor-intensive. The present invention uses water scraping after drainage, and then backwashing after descaling. The water content of impurities is 300%-500% less than that of the equipment on the market, which greatly reduces the waste of water resources. In addition, by adopting a double-layer filter screen scale storage bin, the water in the impurities is filtered out by the filter screen, and the labor intensity is greatly reduced during cleaning.

[0065] The embodiments described above provide a detailed description of the technical solutions of the present invention. It should be understood that the above are only specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, supplements or similar substitutions made within the scope of the principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A horizontal fully automatic pressure-bearing electrochemical water treatment device, characterized in that: include: A reaction tank is provided with a plurality of cathode plates and a plurality of anode plates, the anode plates and the cathode plates are arranged at intervals, and a scraping device is arranged on two sides of each cathode plate; A water collector is arranged above the reaction tank, and a plurality of water collecting pipes are arranged on the water collector, and the water collecting pipes are distributed above the two ends of the cathode plate, and each cathode plate corresponds to the water collecting ports of two water collecting pipes; the water collecting pipes of the water collector collect the wastewater treated by the cathode plate, so that the wastewater to be treated passes through the alkaline area of ​​the cathode plate; The gas storage tank is arranged above the inside of the reaction tank, and the water collecting pipe extends downward from the upper cover plate to form a chamber for storing electrolytic waste gas in the reaction tank. The stored waste gas is discharged by the automatic exhaust valve; A sewage hopper is arranged below the reaction tank and communicated with the reaction tank. The cross section of the sewage hopper is an inverted trapezoid. A sewage outlet and a water inlet are arranged at the bottom of the sewage hopper. The scraping device comprises a plurality of scraper groups, each scraper group comprises two scrapers arranged opposite to each other, a cathode plate is disposed between the two scrapers of each scraper group, and the two scrapers are in contact with the wall surface of the cathode plate; The scraper group is provided with two layers, one above the other, and connected in series via a scraper series shaft; The water inlet is connected to a water inlet pipe, on which a water inlet electric valve is arranged, and the water inlet pipe is arranged in parallel with a drainage pipe, on which a drainage electric valve is arranged; A water outlet is arranged on the water collector, and a water outlet electric valve is installed at the water outlet.

2. The horizontal fully automatic pressure-bearing electrochemical water treatment device according to claim 1, characterized in that: Both ends of the scraper device are connected to the hydraulic cylinder. Driven by the hydraulic cylinder, the scraper moves up and down along the wall surface of the cathode plate.

3. The horizontal fully automatic pressure-bearing electrochemical water treatment device according to claim 1, characterized in that: Two exhaust ports are arranged on the upper cover plate of the reaction tank, and automatic exhaust valves are installed at the exhaust ports.

4. The horizontal fully automatic electrochemical water treatment device according to claim 1, characterized in that: A sewage discharge electric valve is arranged at the sewage discharge outlet.

5. The horizontal fully automatic pressure-bearing electrochemical water treatment device according to claim 1, characterized in that: A water quality detector is also provided on the water outlet pipe of the water collector, and the water quality detector is connected to the controller.

6. An electrochemical water treatment method, implemented by using the horizontal fully automatic pressure-bearing electrochemical water treatment device according to any one of claims 1 to 5, characterized in that: The following steps are involved: Open the water inlet electric valve, the wastewater first enters the sewage hopper for buffering, and then enters the plate reaction area of ​​the reaction tank; Under the action of the water collector, the water flow is forced to be evenly distributed to each reaction chamber in the reaction tank; The treated wastewater is discharged from the outlet of the water collector; Close the water inlet and outlet electric valves, open the drainage electric valve, and the drainage is completed; Open the sewage electric valve, drive the scraper device through the hydraulic cylinder, and discharge various impurities to the outside of the device through the sewage bucket.

7. The electrochemical water treatment method according to claim 6, characterized in that: It also includes a controller which controls the opening and closing of the water inlet electric valve and the water outlet electric valve according to the detection result of the water quality detector.

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