A multi-frequency circulating electrolytic sewage treatment device

Abstract

The utility model discloses a multi -frequency circulating electrolysis sewage treatment device belongs to sewage treatment equipment technical field. It includes the pretreatment system for to the domestic sewage carries out collection and coagulation reaction, solid -liquid separation system is connected with the pretreatment system, is used for coagulation after sewage solid -liquid separation, multi -frequency circulating electrolysis system is connected with the solid -liquid separation system, is used for the clean water after separation multi -frequency circulating electrolysis treatment. The utility model is a kind of structure highly integrated, not by environmental temperature influence, can adapt to different domestic sewage water quality, energy consumption low, efficiency high domestic sewage treatment device according to coagulation sedimentation and electrolysis combination mode.

Description

Technical Field

[0001] This utility model relates to the technical field of sewage treatment equipment, specifically to a multi-frequency circulating electrolytic sewage treatment device. Background Technology

[0002] Direct discharge of domestic sewage can cause environmental pollution and damage aquatic ecosystems. For field construction teams and oil drilling teams located far from urban areas, the traditional method of treating their domestic sewage is to collect it and transport it to sewage treatment plants, which is costly.

[0003] Currently, the mainstream technology for treating domestic sewage is the biological method, which utilizes microorganisms to degrade organic matter. However, this method has significant drawbacks: the activity of microorganisms is significantly affected by temperature; in environments above 40℃ or below 5℃, their activity drops drastically, making it difficult to guarantee treatment effectiveness. Furthermore, the biological method requires a continuous supply of sewage to maintain microbial survival. For field teams that frequently relocate and operate intermittently, maintaining and rebuilding the microbial community is time-consuming and labor-intensive. Therefore, traditional biological methods are not suitable for treating domestic sewage in extreme environments in the field.

[0004] Existing wastewater electrochemical treatment devices typically consist of a power source, electrode plates, and an electrolytic cell. The wastewater electrolysis treatment process is as follows: wastewater enters the electrolytic cell through the inlet, undergoes electrolysis, and then flows out through the outlet. This approach has the following drawbacks: 1. Uneven mass transfer within the electrolytic cell; under the same treatment conditions, water quality indicators vary significantly at different locations within the cell; 2. Low energy utilization and low electrolysis efficiency. To ensure effluent meets standards within a given treatment capacity, larger power sources, larger electrode plates, and larger electrolytic cells are required, resulting in higher energy consumption. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a multi-frequency circulating electrolytic sewage treatment device. Based on the combination of coagulation sedimentation and electrolysis, it is a highly integrated domestic sewage treatment device that is unaffected by ambient temperature, adaptable to different domestic sewage qualities, and has low energy consumption and high efficiency.

[0006] To achieve the above objectives, this utility model adopts the following technical solution: a multi-frequency circulating electrolytic wastewater treatment device, comprising: The pretreatment system is used for collecting and coagulating domestic sewage. A solid-liquid separation system, connected to the pretreatment system, is used for solid-liquid separation of coagulated wastewater; A multi-frequency circulating electrolysis system, connected to the solid-liquid separation system, is used to perform multi-frequency circulating electrolysis treatment on the separated water; The deep processing system is connected to the multi-frequency circulating electrolysis system and is used to purify the water after electrolysis.

[0007] As an improvement of this utility model, the preprocessing system includes: Sewage collection tank; A sewage pump, the inlet of which is connected to the sewage collection tank; A pipe mixer, the inlet of which is connected to the outlet of the sewage pump.

[0008] As an improvement of this utility model, the solid-liquid separation system includes: The sedimentation tank has a sedimentation zone and a clear water zone inside, with an overflow weir between the two. A filter pump, the inlet of which is connected to the clear water zone of the sedimentation tank; A filter, the inlet of which is connected to the outlet of the filter pump.

[0009] As an improvement of this utility model, the multi-frequency cyclic electrolysis system includes: The raw water tank is used to receive clean water from the solid-liquid separation system; An electrolysis reactor used for electrolyzing wastewater; A multi-frequency electrolysis circulation chamber is used to provide circulation buffer capacity; A circulating electrolysis pump, the inlet of which is connected to the multi-frequency electrolysis circulating chamber, and the outlet of which is connected to the inlet of the electrolysis reactor; The outlet of the electrolytic reactor is connected to the inlet of the multi-frequency electrolytic circulation chamber, forming a closed electrolytic circulation loop.

[0010] As an improvement of this utility model, the electrolytic reactor is provided with multiple sets of alternating anode plates and cathode plates, and the distance between any two plates is 5mm to 20mm.

[0011] As an improvement of this utility model, the bottom of the multi-frequency electrolysis circulation chamber is provided with an aeration device.

[0012] As an improvement of this utility model, an electrolyte dosing device is provided above the raw water tank.

[0013] As an improvement of this utility model, it also includes a deep treatment system, which is connected to the multi-frequency circulating electrolysis system for further purification of the electrolyzed water.

[0014] As an improvement of this utility model, it also includes a dosing device, which is connected to the pretreatment system.

[0015] As an improvement of this utility model, the multi-frequency circulating electrolytic wastewater treatment device is an integrated skid-mounted structure.

[0016] Compared with the prior art, the beneficial effects of this utility model are: (1) This utility model adopts a treatment process of “coagulation sedimentation + filtration separation + multi-frequency circulating electrolysis” to achieve the standard treatment of domestic sewage. It is especially suitable for extreme environments and is not affected by ambient temperature.

[0017] (2) This utility model uses a multi-frequency circulating electrolysis system, which allows sewage to enter the high-efficiency electrolysis reactor multiple times by means of a circulating pump. This can promote full contact between water and electrode plates, and also promote the homogenization of water in the electrolysis tank through water disturbance, thus avoiding differences in the degree of sewage electrolysis treatment at different locations.

[0018] (3) Compared with conventional wastewater electrochemical treatment devices, under the same conditions of treatment capacity, wastewater influent and effluent indicators, the multi-frequency circulating electrolysis system, by adopting a combination of high-efficiency electrolysis reactor, circulating electrolysis pump and multi-frequency electrolysis circulation chamber, and using small-specification DC power supply, small-area electrode plates and small-size electrolysis cells, can achieve the same treatment capacity and effluent indicators as conventional wastewater electrochemical treatment devices. This significantly reduces the supporting costs of power supply and electrode plates, and reduces operating energy consumption costs.

[0019] (4) The structure of this utility model is highly integrated, with all systems integrated on the integrated skid body, which facilitates transportation and rapid deployment. It is particularly suitable for scenarios where field construction teams, oilfield drilling teams and other teams frequently change work locations. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present utility model; Figure 2 This is a structural schematic diagram of Embodiment 2 of the present invention.

[0021] In the diagram, 1. Wastewater collection tank; 2. Wastewater pump; 3. Dosing device; 4. Pipeline mixer; 5. Raw water tank; 6. DC power supply; 7. Multi-frequency electrolysis circulation tank; 8. Electrolysis reactor; 9. Circulating electrolysis pump; 10. Raw water pump; 11. Filter; 12. Filter pump; 13. Sedimentation tank; 14. Aeration device; 15. Skid. Detailed Implementation

[0022] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0023] It should be noted that the terms "up," "down," "left," and "right" used in the embodiments of this utility model are only relative concepts or are based on the normal use of the product, and should not be considered as restrictive. Example 1

[0024] like Figure 1 As shown, a multi-frequency circulating electrolytic wastewater treatment device includes: a pretreatment system for collecting and coagulating domestic wastewater; a solid-liquid separation system connected to the pretreatment system for separating solids and liquids in the coagulated wastewater; a multi-frequency circulating electrolysis system connected to the solid-liquid separation system for performing multi-frequency circulating electrolysis treatment on the separated purified water; and a deep treatment system connected to the multi-frequency circulating electrolysis system for purifying the electrolyzed water.

[0025] The aforementioned pretreatment system includes a wastewater collection tank 1, a wastewater pump 2, and a pipeline mixer 4. The inlet of the wastewater pump 2 is connected to the wastewater collection tank 1 via a pipeline, and its outlet is connected to one inlet of the pipeline mixer 4 via a pipeline. The dosing device 3 is connected to the other inlet of the pipeline mixer 4, and the outlet of the pipeline mixer 4 is connected to the inlet of the sedimentation chamber 13 of the solid-liquid separation system via a pipeline.

[0026] The aforementioned solid-liquid separation system includes a sedimentation tank 13, a filter pump 12, and a filter 11. The sedimentation tank 13 is internally divided into a lower sedimentation zone and an upper clear water zone by a partition, with an overflow weir between them. A sludge discharge port is located at the bottom of the sedimentation tank 13. The inlet of the filter pump 12 is connected to the bottom of the clear water zone of the sedimentation tank 13 via a pipe, and its outlet is connected to the inlet of the filter 11 via a pipe. The outlet of the filter 11 is connected to the inlet of the raw water tank 5 of the multi-frequency circulating electrolysis system via a pipe, and its bottom drain port is equipped with an electric drain valve, allowing the filtered solid phase to be periodically discharged through the bottom drain port.

[0027] The multi-frequency circulating electrolysis system includes a raw water tank 5, a raw water pump 10, a DC power supply 6, an electrolysis reactor 8, a multi-frequency electrolysis circulation chamber 7, and a circulating electrolysis pump 9. The DC power supply 6 provides power to the electrolysis reactor 8. The raw water tank 5 has an electrolyte dosing port at the top and contains a level gauge and a stirrer. The inlet of the raw water pump 10 is connected to the bottom outlet of the raw water tank 5, and its outlet is connected to the inlet of the electrolysis reactor 8. The electrolysis reactor 8 contains multiple sets of alternately arranged anode and cathode plates (not shown in the figure). If the plate spacing is too large, the wastewater will not make sufficient contact with the electrode plates, reducing the electrolysis effect; if the plate spacing is too small, heat will be generated during electrolysis, and the small spacing will affect heat dissipation, causing the water temperature in the electrolysis tank to overheat, posing a safety hazard. Therefore, to balance the above conditions, the spacing between any two electrode plates is 5mm to 20mm, and the actual spacing needs to be selected according to the specifications of the electrolysis reactor. Its outlet is connected to the top inlet of the multi-frequency electrolysis circulation chamber 7 via a pipe. An aeration device 14 is installed at the bottom of the multi-frequency electrolysis circulation chamber 7. The inlet of the circulation electrolysis pump 9 is connected to the lower outlet of the multi-frequency electrolysis circulation chamber 7 via a pipe, and its outlet is connected to the inlet of the electrolysis reactor 8 via a pipe, thus forming a closed electrolysis circulation loop. The multi-frequency electrolysis circulation chamber 7 provides sufficient capacity for the multi-frequency circulation electrolysis of wastewater, allowing wastewater to enter the electrolysis reactor 8 multiple times via the circulation electrolysis pump 9. The aeration device 14 at the bottom generates airflow disturbance through a high-pressure blower, homogenizing the water flow within the chamber and improving the circulation electrolysis effect. A final outlet is provided on the upper side wall of the multi-frequency electrolysis circulation chamber 7, which is connected to the advanced treatment system. The advanced treatment system is connected to the multi-frequency circulation electrolysis system for further purification of the electrolyzed water.

[0028] The working principle of this utility model is as follows: (1) Domestic sewage flows into sewage collection tank 1 and is pumped to sedimentation tank 13 by sewage pump 2. At the same time, flocculant is added through pipeline mixer 4 to promote the aggregation of small particles in the liquid to form larger clusters.

[0029] (2) The wastewater treated in step (1) above enters the bottom of the sedimentation tank. The packing material in the sedimentation tank accelerates the separation of the liquid phase and the solid phase. The solid phase is periodically discharged by the bottom sludge pump, and the liquid phase overflows to the clear water area.

[0030] (3) Wastewater from the clear water zone is transported to filter 11 by filter pump 12. After further removal of suspended solids, the wastewater enters raw water tank 5. At the same time, electrolyte is added to improve the conductivity of the wastewater and enhance the electrolysis efficiency. A flow meter is installed at the outlet of filter 11, and an electrolyte dosing port is provided at the top of raw water tank 5 to automatically adjust the dosage according to the flow parameters.

[0031] (4) The wastewater in the raw water tank 5 enters the electrolysis reactor 8 through the raw water pump 10. At the same time, the DC power supply 6 is started to apply an electric field to the positive and negative electrodes to decompose the wastewater. After the wastewater is discharged from the electrolysis reactor 8, it enters the multi-frequency electrolysis circulation tank 7 and is pumped back to the electrolysis reactor 8 by the circulation electrolysis pump 9. After the wastewater is compliant after multiple cycles of electrolysis, it is discharged from the overflow port at the top of the multi-frequency electrolysis circulation tank 7 and discharged into the deep treatment system for subsequent reuse or discharge.

[0032] (5) During operation, the aeration device 14 is turned on to introduce high-pressure air into the bottom of the multi-frequency electrolysis circulation chamber 7, thereby agitating the liquid and making the water quality more homogeneous.

[0033] The following experiments were conducted on wastewater treatment using multi-frequency circulating electrolysis and non-circulating electrolysis. The experimental results are as follows: 1.1 Experiment on electrolysis of wastewater using small electrode plates (water not circulating) Experimental conditions: 4L of water in the electrolytic cell, 100mm wide small electrode plates, current density 276 A / ㎡, current 16.6A, wastewater in the electrolytic cell is not circulated. See Table 1 below for details.

[0034] 1.2 Small Electrode Plate Circulating Electrolysis Experiment of Wastewater Experimental conditions: 4L of water in the electrolytic cell, 100mm wide electrode plates, current density 276 A / ㎡, current 16.6A, wastewater in the electrolytic cell is pumped and circulated back and forth by a circulation pump, and the electrolysis is carried out 4 times per hour. See Table 2 below for details.

[0035] Table 1. Analysis results of small electrode plate electrolysis experiment (water non-circulating electrolysis)

[0036] Table 2. Results of Cyclic Electrolysis Experiment with Small Electrode Plates

[0037] As can be seen from the comparison of Tables 1 and 2, under the same electrode plates, the same amount of wastewater, and the same time conditions, the COD and ammonia nitrogen indicators of the treated water samples are significantly better when using the circulating electrolysis method.

[0038] 2.1 Electrolysis of wastewater using large electrode plates (water not circulating) Experimental conditions: 11L of water in the electrolytic cell, large electrode plates with a width of 160mm, current density of 276 A / ㎡, actual current of 63.6 A, wastewater in the electrolytic cell is not circulated. See Table 3 below for details.

[0039] 2.2 Experiment on the circulating electrolysis of wastewater using large electrode plates Experimental conditions: 11L of water in the electrolytic cell, large electrode plates with a width of 160mm, current density of 276 A / ㎡, set current of 63.6 A, wastewater in the electrolytic cell is pumped and circulated back and forth by a circulation pump, and the electrolysis is carried out 7 times per hour. See Table 4 below for details.

[0040] Table 3. Experimental analysis results of the large electrode plate (water non-circulating electrolysis)

[0041] Table 4. Results of Cyclic Electrolysis Experiment with Large Electrode Plates

[0042] As can be seen from the comparison of Tables 3 and 4, under the same electrode plates, the same amount of wastewater, and the same time conditions, the COD and ammonia nitrogen indicators of the treated water samples are significantly better when using the circulating electrolysis method.

[0043] Example 2: like Figure 2 As shown, this embodiment differs from Embodiment 1 in that all systems in this embodiment are integrated onto a single skid 15, facilitating transportation and rapid deployment, making it particularly suitable for scenarios where field construction teams, oilfield drilling teams, and other operations frequently change locations. The following is a detailed description of this embodiment: The skid 15 is equipped with, from left to right, a dosing device 3, a filter 11, a filter pump 12, a sedimentation tank 13, a circulating electrolysis pump 9, an electrolysis reactor 8, and a DC power supply 6. The multi-frequency electrolysis circulation tank 7 and the electrolysis reactor 8 are arranged side-by-side; the raw water tank and the sedimentation tank 13 are arranged side-by-side; the raw water pump 10 and the filter pump 12 are arranged side-by-side; and the pipeline mixer 4 is located on the inner wall of the skid 15 near the dosing device 3. The skid 15 is a single, integrated box structure. This design is compact, stable, and distributes stress evenly, avoiding the risk of tipping over during transportation.

[0044] The above provides a detailed description of the multi-frequency circulating electrolytic wastewater treatment device provided by this utility model. Specific examples have been used to illustrate the structural principle and implementation method of this utility model. The above embodiments are only used to help understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation method and application scope based on the idea of ​​this utility model. Therefore, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A multi-frequency circulating electrolytic wastewater treatment device, characterized in that, include: The pretreatment system is used for collecting and coagulating domestic sewage. A solid-liquid separation system, connected to the pretreatment system, is used for solid-liquid separation of coagulated wastewater; A multi-frequency circulating electrolysis system is connected to the solid-liquid separation system and is used to perform multi-frequency circulating electrolysis treatment on the separated water.

2. The multi-frequency circulating electrolytic wastewater treatment device according to claim 1, characterized in that, The preprocessing system includes: Sewage collection tank; A sewage pump, the inlet of which is connected to the sewage collection tank; A pipe mixer, the inlet of which is connected to the outlet of the sewage pump.

3. The multi-frequency circulating electrolytic wastewater treatment device according to claim 1, characterized in that, The solid-liquid separation system includes: The sedimentation tank has a sedimentation zone and a clear water zone inside, with an overflow weir between the two. A filter pump, the inlet of which is connected to the clear water zone of the sedimentation tank; A filter, the inlet of which is connected to the outlet of the filter pump.

4. The multi-frequency circulating electrolytic wastewater treatment device according to claim 1, characterized in that, The multi-frequency cyclic electrolysis system includes: The raw water tank is used to receive clean water from the solid-liquid separation system; An electrolysis reactor used for the electrolysis of wastewater; A multi-frequency electrolysis circulation chamber is used to provide circulation buffer capacity; A circulating electrolysis pump, the inlet of which is connected to the multi-frequency electrolysis circulating chamber, and the outlet of which is connected to the inlet of the electrolysis reactor; The outlet of the electrolytic reactor is connected to the inlet of the multi-frequency electrolytic circulation chamber, forming a closed electrolytic circulation loop.

5. The multi-frequency circulating electrolytic wastewater treatment device according to claim 4, characterized in that, The electrolytic reactor is equipped with multiple sets of alternating anode plates and cathode plates, with a spacing of 5mm to 20mm between any two plates.

6. The multi-frequency circulating electrolytic wastewater treatment device according to claim 4, characterized in that, An aeration device is installed at the bottom of the multi-frequency electrolysis circulation chamber.

7. The multi-frequency circulating electrolytic wastewater treatment device according to claim 4, characterized in that, An electrolyte dosing device is installed above the raw water tank.

8. The multi-frequency circulating electrolytic wastewater treatment device according to claim 1, characterized in that, It also includes a deep treatment system, which is connected to the multi-frequency circulating electrolysis system for further purification of the electrolyzed water.

9. A multi-frequency circulating electrolytic wastewater treatment device according to any one of claims 1 to 8, characterized in that, It also includes a dosing device, which is connected to the pretreatment system.

10. A multi-frequency circulating electrolytic wastewater treatment device according to any one of claims 1 to 8, characterized in that, The multi-frequency circulating electrolytic wastewater treatment device is an integrated skid-mounted structure.

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