Electrochemical treatment device for landfill leachate
By designing a box-type structured waste leachate electrochemical treatment device, electrochemical electrolytic treatment using electrode assembly and flocculant, the problems of high land occupation, cost and energy consumption in traditional methods are solved, and purification efficiency is improved and cost is reduced. .
Patent Information
- Application Number
- CN202420671414.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-02
- Publication Date
- 2024-12-20
- Estimated Expiration
- 2034-04-02
AI Technical Summary
Traditional garbage leachate treatment methods have problems such as large area, high civil engineering costs and high energy consumption, and lack the technology to effectively remove organic wastewater.
Design a box-type structure of waste leachate electrochemical treatment device, including a flocculation box and a catalytic treatment box, built-in electrode assembly, treat organic pollutants in the leachate through electrochemical electrolysis, and perform preliminary use of flocculants and aeration devices. deal with.
It has achieved small building area, low civil construction costs, reduced temperature and energy consumption, improved purification efficiency and reduced costs.
Smart Images
Figure CN222204989U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of garbage treatment, and in particular to an electrochemical treatment device for garbage leachate. Background Art
[0002] During the process of garbage stacking and landfilling, due to biochemical degradation such as compaction and fermentation, and under the seepage of precipitation and groundwater, a liquid with high concentration of organic or inorganic components is produced. We call it garbage leachate, also known as leachate. There are many factors that affect the generation of leachate, mainly the rainfall in the garbage stacking and landfilling area, the nature and composition of the garbage, the anti-seepage treatment of the landfill, and the hydrogeological conditions of the site.
[0003] Landfill leachate has characteristics different from general urban sewage: high BOD5 and COD concentrations, high metal content, large changes in water quality and quantity, high ammonia nitrogen content, imbalanced ratio of microbial nutrients, etc. Among the leachate treatment methods, the simplest method is to treat the leachate and urban sewage together. However, landfills are usually far away from towns, so there are certain specific difficulties in treating their leachate and urban sewage together, and they often have to be treated separately.
[0004] Traditionally, leachate treatment involves digging pits and building low-rise treatment plants, which then sequentially carry out anaerobic, anoxic and aerobic treatment techniques. Such low-rise treatment plants occupy a large area, have high civil engineering costs and a long construction cycle. At the same time, traditional leachate treatment equipment does not use photocatalytic reactions to remove organic wastewater from the leachate, and general anaerobic and aerobic reactions require temperature control to adapt to the metabolic temperatures of different microorganisms, which consumes a lot of energy and has high costs. Utility Model Content
[0005] The main purpose of this application is to provide an electrochemical treatment device for landfill leachate, aiming to solve the above-mentioned problems.
[0006] The technical solutions adopted in this application are as follows:
[0007] A device for electrochemical treatment of landfill leachate comprises a flocculation box and a catalytic treatment box, wherein a water inlet is arranged at the top of the flocculation box, a water outlet is arranged at the top of the catalytic treatment box, and the water level of the water inlet is higher than the water level of the water outlet, the inner bottom of the flocculation box is directly connected with the inner bottom of the catalytic treatment box through a first constriction, a second constriction is arranged in the middle of the catalytic treatment box, a water purification chamber is arranged above the second constriction, and a buffer chamber is arranged below the second constriction, a sealing plate is arranged at the second constriction, and a plurality of electrode assemblies arranged on the surface of the sealing plate are placed in the second constriction, wherein:
[0008] The electrode assembly includes an anode cylinder and a cathode cylinder. The cathode cylinder is located at one side of the cache chamber and is open. The anode cylinder is arranged in the cathode cylinder, and both ends of the anode cylinder are sealed. The anode cylinder includes an outer cylinder and an inner cylinder. Filling material is arranged between the inner cylinder and the outer cylinder. The side walls of the outer cylinder and the inner cylinder are both provided with water holes, and the inner cylinder is connected to the water purification chamber.
[0009] Optionally, a flocculant filling port is also provided on the top of the flocculation box, and an aeration device is provided inside the flocculation box.
[0010] Optionally, the aeration device includes an aeration pipe and a blower, the aeration pipe is arranged in the flocculation box, the blower is arranged outside the flocculation box, and the blower is connected to the aeration pipe through an air supply pipe.
[0011] Optionally, the water purification chamber is provided with a circulating water pipe, which is connected to the flocculation tank and is located at the bottom of the aeration pipe, and the water level of the water inlet of the circulating water pipe is higher than the water level of the aeration pipe.
[0012] Optionally, the inner bottom surface of the flocculation box is provided with a mud discharge slope, and the bottom side wall of the flocculation box is provided with a sewage outlet, and the sewage outlet is located at one side of the bottom of the mud discharge slope.
[0013] Optionally, a detachable filter screen is provided at the first bottleneck.
[0014] Optionally, a drain outlet is provided at the bottom of the cache chamber.
[0015] Optionally, the sealing plate is detachably arranged on the top side of the second narrow opening by bolts.
[0016] Optionally, the end cap of the cathode cylinder is provided with a cathode terminal, the end cap of the anode cylinder is provided with an anode terminal, and a power supply device electrically connected to the cathode terminal and the anode terminal is provided outside the second bottleneck.
[0017] Optionally, an openable box cover is provided on the top of the catalytic treatment box.
[0018] Compared with the prior art, the beneficial effects of this application are:
[0019] An electrochemical treatment device for landfill leachate proposed in an embodiment of the present application transforms a traditional low treatment plant into a box-type structure, thereby reducing the building footprint, lowering the civil construction cost and shortening the construction period. Electrode assemblies are also arranged in the treatment chamber to achieve electrochemical electrolysis of organic pollutants in the leachate, thereby increasing purification efficiency, reducing temperature control energy consumption in the tower body and reducing costs. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] Figure 1A schematic diagram of the structure of the electrochemical treatment device for landfill leachate provided in an embodiment of the present application at one viewing angle;
[0021] Figure 2 Schematic diagram of the structure of the electrode assembly.
[0022] Description of the reference numerals in the accompanying drawings:
[0023] 100-flocculation box, 101-water inlet, 102-flocculant filling port, 103-sludge discharge inclined plate, 104-sewage outlet, 200-catalytic treatment box, 201-buffer chamber, 202-water purification chamber, 3-aeration pipe, 4-blower, 5-air supply pipe, 6-first constriction, 7-filter screen, 8-drainage outlet, 9-second constriction, 10-sealing plate, 11-cathode cylinder, 12-outer cylinder, 13-filling material, 14-inner cylinder, 15-water hole, 16-cathode terminal, 17-anode terminal, 18-power supply device, 19-water outlet, 20-circulating water pipe, 21-box cover. DETAILED DESCRIPTION
[0024] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.
[0025] It should be noted that all directional indications in the embodiments of the present application (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.
[0026] In this application, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.
[0027] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present application, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme that satisfies both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in the field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.
[0028] Refer to the attached Figure 1 As shown, the embodiment of the present application provides an electrochemical treatment device for landfill leachate, including a flocculation box 100 and a catalytic treatment box 200. The flocculation box 100 is higher than the catalytic treatment box 200. The flocculation box 100 is provided with a top cover, which can be opened. The top cover is provided with a water inlet 101 and a flocculant filling port 102. When in use, the landfill leachate is added into the flocculation box 100 from the water inlet 101, and the flocculant is added from the flocculant filling port 102, and reacts with the landfill leachate in the flocculation box 100 and precipitates. A mud discharge inclined plate 103 is provided on the inner bottom surface of the flocculation box 100. The height of the mud discharge inclined plate 103 gradually decreases from the side of the catalytic treatment box 200 to the side of the flocculation box 100. A sewage outlet 104 is provided on the side wall of the flocculation box 100 located at the bottom of the slope of the mud discharge inclined plate 103. The precipitate after the flocculation reaction flows from the mud discharge inclined plate 103 into the sewage outlet 104 for sewage discharge. Of course, the sewage outlet 104 is provided with a valve, and the sewage can be discharged by opening the valve.
[0029] Of course, in a preferred embodiment, in order to make the flocculation reaction sufficient, see Figure 1 As shown, an aeration device is provided inside the flocculation box 100. The aeration device includes an aeration pipe 3 and a blower 4. The aeration pipe 3 is provided inside the flocculation box 100, and the blower 4 is provided outside the flocculation box 100. The blower 4 is connected to the aeration pipe 3 through an air supply pipe 5. The blower 4 transports gas to the aeration pipe 3 through the air supply pipe 5 for aeration. The aeration pipe 3 is evenly aerated to disturb the sewage in the box and achieve a stirring and mixing effect, so that the flocculation reaction is sufficient.
[0030] Of course, a circulating water pipe 20 is provided on the top side wall of the catalytic treatment box 200. The circulating water pipe 20 is connected to the flocculation box 100 and is located at the bottom of the aeration pipe 3. The water level of the water inlet 101 of the circulating water pipe 20 is higher than the water level of the aeration pipe 3. The high-position circulating water pipe 20 injects water into the bottom of the aeration pipe 3, and uses the water pressure to further form impact disturbance near the aeration pipe 3, so that the flocculation reaction is sufficient.
[0031] In the above, the inner bottom of the flocculation box 100 is directly connected to the inner bottom of the catalytic treatment through the first constriction 6. After the garbage leachate enters the flocculation box 100 for precipitation, it enters the catalytic treatment box 200 from the first constriction 6. In order to reduce the precipitation of impurities entering the catalytic treatment box 200, in a preferred embodiment, a filter screen 7 is provided at the first constriction 6, and a plug hole is provided on the top side of the first constriction 6. The filter screen 7 is inserted into the first constriction 6 from the plug hole for precipitation and impurity blocking. The filter screen 7 is sealed with the plug hole and fixed by screws. After a period of use, the filter screen 7 can be removed for cleaning or replacement.
[0032] In this embodiment, see Figure 1 As shown, a second orifice 9 is provided in the middle of the catalytic treatment box 200, and a water purification chamber 202 is provided above the second orifice 9. An openable box cover 21 is provided on the top of the water purification chamber 202. After the box cover 21 is opened, the interior can be cleaned and repaired. A cache chamber 201 is provided below the second orifice 9. A sealing plate 10 is provided at the second orifice 9. The sealing plate 10 is fixedly installed on the top side of the second orifice 9 by bolts. The sealing plate 10 fixed by bolts can be disassembled, which is convenient for repairing and replacing the electrode assembly and cleaning the catalytic treatment box 200. The sealing plate The surface of the 10 is provided with several groups of electrode assemblies. After the garbage leachate from the flocculation box 100 to the catalytic treatment box 200 enters the buffer chamber 201, since the height of the flocculation box 100 is higher than that of the catalytic treatment box 200, the sewage goes up through the second pass 9 and enters the clean water chamber 202 after catalytic decomposition due to the pressure difference during the continuous addition of garbage leachate. The top side wall of the clean water chamber 202 is provided with a water outlet 19. The water level of the water outlet 19 is lower than the water level of the water inlet 101, so the purified clean water overflows from the water outlet 19. It can be imagined that the purpose of using clean water overflowing from the top is that the sediment in the water is heavier and is settled in the buffer chamber 201 due to gravity, so that the clean water in the clean water chamber 202 is clean water with less sediment. Since the water outlet 19 is located at the upper side, the sewage in the flocculation box 100 and the catalytic treatment box 200 cannot be completely discharged. Therefore, after a period of use, the sewage in the two boxes can be discharged to clean the interior while cleaning the sediment in the flocculation box 100. Of course, in order to facilitate the discharge of the sewage in the catalytic treatment box 200, a drain port 8 is provided on the bottom side wall of the buffer chamber 201, and the drain port 8 is provided with a valve.
[0033] In the above embodiments, see Figure 2 As shown, the electrode assembly includes a cathode cylinder 11 and an anode cylinder. The cathode cylinder 11 and the anode cylinder are both fixed to the bottom surface of the sealing plate 10. The cathode cylinder 11 is open on the side facing the cache chamber 201 to facilitate the entry of sewage. The anode cylinder is located inside the cathode cylinder 11 and sealed at both ends. The anode copper includes an outer cylinder 12 and an inner cylinder 14. A filling material 13 is provided between the outer cylinder 12 and the inner cylinder 14. The filling material 13 is a porous adsorption material, preferably activated carbon fiber, because the activated carbon fiber has a small resistance, a thickness of 230 55mm, and a specific surface area of the activated carbon fiber is not less than 1600m / g, which can further adsorb and precipitate impurities. The side walls of the inner cylinder 14 and the outer cylinder 12 are both provided with a plurality of water holes 15, and the inner cylinder 14 passes through the sealing plate 10 and communicates with the clean water chamber 202. Thus, the sewage reaches the clean water chamber 202 from the cathode cylinder 11 through the outer cylinder 12 and the inner cylinder 14.
[0034] In the above, the end cover of the cathode cylinder 11 and the end cover of the anode cylinder are fixed to the sealing plate 10 to form a seal, the end cover of the cathode cylinder 11 is provided with a cathode terminal 16, and the end cover of the anode cylinder is provided with an anode terminal 17, the cathode terminal 16 and the anode terminal 17 are both sealed in the sealing plate 10, and a power supply device 18 is provided on the outside of the second narrow opening 9, the anode of the power supply device 18 is electrically connected to the anode terminal 17, and the cathode of the power supply device 18 is electrically connected to the cathode terminal 16, so that an electrolysis chamber is formed between the anode cylinder and the cathode cylinder 11, and the sewage flowing through is electrolytically treated.
[0035] In summary, the working principle of the electrochemical treatment device for landfill leachate provided in the embodiment of the present application is as follows:
[0036] Leachate and flocculant are added into the flocculation box 100. After flocculation and sedimentation, the sediment is blocked by the filter screen 7 and retained in the flocculation box 100. The sewage after preliminary treatment enters the catalytic treatment box 200. Under the continuous injection of hydraulic pressure, the sewage enters the second pass 9 from the buffer chamber 201. After passing through the second pass 9, the electrolysis is completed in the electrolysis chamber formed by the cathode cylinder 11 and the anode cylinder. After electrolysis, it reaches the clean water chamber 202 and is discharged from the outlet 19.
[0037] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.
Claims
1. A landfill leachate electrochemical treatment device, characterized in that: It comprises a flocculation box and a catalytic treatment box, wherein a water inlet is arranged on the top of the flocculation box, a water outlet is arranged on the top of the catalytic treatment box, and the water level of the water inlet is higher than the water level of the water outlet, the inner bottom of the flocculation box is directly connected with the inner bottom of the catalytic treatment box through a first constriction, a second constriction is arranged in the middle of the catalytic treatment box, a water purification chamber is arranged above the second constriction, and a cache chamber is arranged below the second constriction, a sealing plate is arranged at the second constriction, and a plurality of electrode assemblies placed in the second constriction are arranged on the surface of the sealing plate, wherein: The electrode assembly includes an anode cylinder and a cathode cylinder. The cathode cylinder is located at one side of the cache chamber and is open. The anode cylinder is arranged in the cathode cylinder, and both ends of the anode cylinder are sealed. The anode cylinder includes an outer cylinder and an inner cylinder. Filling material is arranged between the inner cylinder and the outer cylinder. The side walls of the outer cylinder and the inner cylinder are both provided with water holes, and the inner cylinder is connected to the water purification chamber.
2. The electrochemical treatment device for landfill leachate according to claim 1, characterized in that: The top of the flocculation box is also provided with a flocculant filling port, and the interior of the flocculation box is provided with an aeration device.
3. The electrochemical treatment device for landfill leachate according to claim 2, characterized in that: The aeration device comprises an aeration pipe and a blower. The aeration pipe is arranged in the flocculation box, and the blower is arranged outside the flocculation box. The blower is connected to the aeration pipe through an air supply pipe.
4. The electrochemical treatment device for landfill leachate according to claim 3, characterized in that: The water purification chamber is provided with a circulating water pipe, which is connected to the flocculation tank and is located at the bottom of the aeration pipe. The water level of the water inlet of the circulating water pipe is higher than the water level of the aeration pipe.
5. The electrochemical treatment device for landfill leachate according to claim 1, characterized in that: The inner bottom surface of the flocculation box is provided with a mud discharge slope, and the bottom side wall of the flocculation box is provided with a sewage discharge port, and the sewage discharge port is located at one side of the bottom of the mud discharge slope.
6. The electrochemical treatment device for landfill leachate according to claim 1, characterized in that: A detachable filter screen is provided at the first narrow opening.
7. The electrochemical treatment device for landfill leachate according to claim 1, characterized in that: A drain outlet is provided at the bottom of the cache chamber.
8. The electrochemical treatment device for landfill leachate according to claim 1, characterized in that: The sealing plate is detachably arranged on the top side of the second narrow opening by means of bolts.
9. The electrochemical treatment device for landfill leachate according to claim 1, characterized in that: The end cap of the cathode cylinder is provided with a cathode terminal, the end cap of the anode cylinder is provided with an anode terminal, and a power supply device electrically connected to the cathode terminal and the anode terminal is provided outside the second constriction.
10. The electrochemical treatment device for landfill leachate according to claim 1, characterized in that: The top of the catalytic treatment box is provided with an openable box cover.