Pipeline type aquaculture wastewater pretreatment device based on iron-carbon micro-electrolysis

Abstract

The utility model discloses a pipeline type aquaculture wastewater pretreatment device based on iron-carbon micro-electrolysis. A containing cavity is formed in a filtering bin, an electrolysis cavity is formed above a deposition cavity, a first filtering unit is arranged in the containing cavity, a liquid inlet pipeline penetrates through the side wall of the filtering bin, the liquid inlet pipeline is communicated with the electrolysis cavity, and the liquid inlet pipeline is used for supplying waste liquid to the filtering bin; the liquid outlet pipeline penetrates through the side wall of the filtering bin, is communicated with the electrolysis cavity and is used for discharging filtered waste liquid. Through the arrangement of the electrolysis cavity and the deposition cavity, the aquaculture wastewater in the electrolysis cavity is electrolyzed and filtered, and harmful substances such as heavy metal ions and organic matters in the wastewater can be efficiently removed; meanwhile, the first filtering unit and the two cavities are arranged in an up-down layered mode, impurities in waste liquid are screened out, particulate matter such as suspended matter and silt in waste water is removed, and deposition and scaling of the particulate matter in a pipeline are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of aquaculture wastewater treatment, in particular to a pipeline-type aquaculture wastewater pretreatment device based on iron-carbon microelectrolysis. Background Art

[0002] The aquaculture wastewater contains rich nutrients such as nitrogen and phosphorus, which can be used as fertilizers to promote the growth of crops, realize the reuse of nutrient resources in the wastewater, reduce the environmental pollution caused by aquaculture wastewater, and improve the fertility and utilization efficiency of the soil. Moreover, the combination of aquaculture and planting by connecting aquaculture wastewater with the planting of agricultural and forestry crops can greatly improve the comprehensive benefits of the aquaculture industry, reduce the cost of treating a large amount of aquaculture wastewater, and improve the yield and quality of the aquaculture industry and crops. Therefore, using the combination of aquaculture and planting to achieve the effective combination of aquaculture wastewater and agriculture and forestry and improve the comprehensive benefits of the aquaculture industry and agriculture and forestry is a model currently promoted in society.

[0003] However, there are also many problems in the development of such a combination model of aquaculture and planting. From the initial water flushing manure with a large amount of water consumption to the later water-soaked manure with less water demand, the discharged wastewater and feces are mixed together, which is easy to form blockages. In the manure pit, the sewage is not enough to flow out, resulting in the fermentation of feces to form a biogas digester. The biogas slurry undergoes continuous anaerobic fermentation and reflux, and the COD, ammonia nitrogen concentration, conductivity, etc. continue to rise. After anaerobic degradation, most of the inorganic elements in the organic matter exist in the form of acid radicals in the biogas slurry. When the free acid radicals encounter metal ions, metal salts will be formed. And due to the possible change of temperature during the pipeline transportation of the biogas slurry, the dissolved salts in the biogas slurry will be condensed out to form scale on the inner wall of the pipeline. Especially at the elbows of the pipeline, due to the reduced flow velocity, scaling and accumulation are more likely to occur. The water quality problem of the wastewater becomes more and more serious, and the indexes such as SS, COD, and conductivity continue to rise, affecting the discharge of aquaculture wastewater and making it difficult to develop the combination model of aquaculture and planting. Summary of the Utility Model

[0004] In view of the above problems, the present application provides a pipeline-type aquaculture wastewater pretreatment device based on iron-carbon microelectrolysis to degrade the acid radicals in the biogas slurry, avoid the adhesion of metal salts to the inner wall of the pipeline, and improve the wastewater discharge efficiency.

[0005] To achieve the above object, the present application provides a pipeline-type aquaculture wastewater pretreatment device based on iron-carbon microelectrolysis, including:

[0006] A filter chamber, which has a containing cavity inside. The containing cavity includes: an electrolysis cavity and a sedimentation cavity. The electrolysis cavity is placed above the sedimentation cavity, and the electrolysis cavity is used to contain the filtering raw materials, and the sedimentation cavity is used to contain the sediment in the waste liquid;

[0007] A first filtering unit, which is placed in the accommodating cavity. The first filtering unit is used to separate the electrolysis cavity and the deposition cavity, and the first filtering unit is used to place filtering raw materials.

[0008] A liquid inlet pipeline, which penetrates through the side wall of the filtering bin and is communicated with the electrolysis cavity. The liquid inlet pipeline is used to supply waste liquid to the filtering bin.

[0009] A liquid outlet pipeline, which penetrates through the side wall of the filtering bin and is communicated with the electrolysis cavity. The liquid outlet pipeline is used to discharge the filtered waste liquid.

[0010] In the technical solution of the embodiment of the present application, it further includes: a first cover body. A sediment through-hole penetrates through the filtering bin and is communicated with the deposition cavity. A sediment through-hole is provided on the sediment through-hole, and the first cover body is covered on the sediment through-hole.

[0011] In the technical solution of the embodiment of the present application, the sediment through-hole penetrates through the bottom of the filtering bin.

[0012] In the technical solution of the embodiment of the present application, it further includes: a backwashing pipeline and two valves. One end of the backwashing pipeline is communicated with the liquid inlet pipeline, and the other end of the backwashing pipeline is communicated with the liquid outlet pipeline.

[0013] One of the valves is placed on the liquid inlet pipeline and is located on the side of the backwashing pipeline close to the filtering bin; the other valve is placed on the liquid outlet pipeline and is located on the side of the backwashing pipeline far from the filtering bin.

[0014] In the technical solution of the embodiment of the present application, it further includes: a second filtering unit, which is placed at the connection between the liquid inlet pipeline and the filtering bin. The second filtering unit is used to filter impurities in the waste liquid.

[0015] In the technical solution of the embodiment of the present application, the second filtering unit includes: a filter screen and a second cover body. A cleaning through-hole penetrates through the filtering bin, and the second cover body is covered on the cleaning through-hole.

[0016] The filter screen is placed in the electrolysis cavity. The electrolysis cavity includes: a first filtering cavity and a second filtering cavity. The first filtering cavity is communicated with the liquid inlet pipeline and the cleaning through-hole. The filter screen is used to separate... In the technical solution of the embodiment of the present application, the filter screen is a 200-mesh filter screen.

[0017] In the technical solution of the embodiment of the present application, the first filtering unit is a 20-mesh filter screen.

[0018] Different from the prior art, through the arrangement of the electrolysis chamber and the deposition chamber, the above technical solution electrolytically filters the aquaculture wastewater located in the electrolysis chamber, and can efficiently remove harmful substances such as heavy metal ions and organic matters in the wastewater; at the same time, through the arrangement of the first filtering unit and the upper and lower layered arrangement of the two chambers, impurities in the waste liquid are screened out, suspended solids, sediment and other particulate matters in the wastewater are removed, and the deposition and scaling of these substances in the pipeline are reduced. At the same time, through the arrangement of the filtering raw material, the inner wall of the pipeline is prevented from scaling by electrolyzing the waste liquid, and the pipeline is kept unobstructed.

[0019] The above description is only an overview of the technical solution of the present application. In order to be able to understand the technical means of the present application more clearly, it can be implemented according to the content of the specification. And in order to make the above and other purposes, features and advantages of the present application more obvious and understandable, the following specifically illustrates the specific embodiments of the present application. Brief Description of the Drawings

[0020] By reading the following detailed description of the preferred embodiments, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present application. Moreover, in all the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0021] Figure 1 It is a structural diagram of a pipeline-type aquaculture wastewater pretreatment device based on iron-carbon microelectrolysis described in the specific embodiment;

[0022] Figure 2 It is a structural diagram of the backwashing pipeline described in the specific embodiment;

[0023] Figure 3 It is a structural diagram of the second filtering unit and the cleaning through holes described in the specific embodiment;

[0024] Figure 4 It is a structural diagram of the electrolysis chamber, the deposition chamber and the sediment through holes described in the specific embodiment;

[0025] Figure 5 It is a schematic diagram of the water flow direction during backwashing of the backwashing pipeline described in the specific embodiment.

[0026] Description of the Reference Numerals in the Drawings:

[0027] 10. Filtering bin; 20. First filtering unit; 30. Liquid inlet pipeline; 40. Liquid outlet pipeline; 50. Backwashing pipeline; 60. Valve; 70. Second filtering unit; 80. Filtering raw material;

[0028] 11. Accommodating cavity; 12. Sediment through hole; 13. Cleaning through hole; 14. First cover body;

[0029] 71. Filter screen; 72. Second cover body;

[0030] 111. Electrolysis chamber; 112. Deposition chamber;

[0031] 1111. First filtration chamber; 1112. Second filtration chamber. Detailed implementation manners

[0032] The embodiments of the technical solutions of the present application will be described in detail below with reference to the accompanying drawings. The following embodiments are only used to illustrate the technical solutions of the present application more clearly, and therefore are only examples and cannot be used to limit the protection scope of the present application.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the description of the specification, claims and drawings of this application are intended to cover non-exclusive inclusion.

[0034] In the description of the embodiments of this application, technical terms such as "first" and "second" are only used to distinguish different objects and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity, specific order or primary-secondary relationship of the indicated technical features. In the description of the embodiments of this application, "a plurality of" means two or more, unless otherwise specifically defined.

[0035] Referring to "embodiments" herein means that the specific features, structures or characteristics described in connection with the embodiments can be included in at least one embodiment of this application. The phrase appears in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0036] In the description of the embodiments of this application, the term "and / or" is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0037] In the description of the embodiments of this application, the term "a plurality of" refers to two or more (including two). Similarly, "a plurality of groups" refers to two or more groups (including two groups), and "a plurality of sheets" refers to two or more sheets (including two sheets).

[0038] In the description of the embodiments of the present application, the orientation or positional relationship indicated by technical terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the embodiments of the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the embodiments of the present application.

[0039] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can also be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0040] Please refer to Figures 1 to 5 , this embodiment provides a pipeline-type aquaculture wastewater pretreatment device based on iron-carbon microelectrolysis, including:

[0041] A filtration chamber 10, which has a receiving cavity 11 inside. The receiving cavity 11 includes: an electrolysis cavity 111 and a sedimentation cavity 112. The electrolysis cavity 111 is located above the sedimentation cavity 112, and the electrolysis cavity 111 is used to accommodate the filtration raw material 80, and the sedimentation cavity 112 is used to accommodate the sediment in the waste liquid;

[0042] A first filtration unit 20, which is placed in the receiving cavity 11. The first filtration unit 20 is used to separate the electrolysis cavity 111 and the sedimentation cavity 112, and the first filtration unit 20 is used to place the filtration raw material 80;

[0043] An inlet pipeline 30, which penetrates through the side wall of the filtration chamber 10 and is in communication with the electrolysis cavity 111. The inlet pipeline 30 is used to supply waste liquid to the filtration chamber 10;

[0044] An outlet pipeline 40, which penetrates through the side wall of the filtration chamber 10 and is in communication with the electrolysis cavity 111. The outlet pipeline 40 is used to discharge the filtered waste liquid.

[0045] The filter chamber 10 is a chamber made of corrosion-resistant material. The filter chamber 10 has a hollow structure inside, and the hollow part of the filter chamber 10 is the accommodation cavity 11, which is used to accommodate filter raw materials 80, sediment, waste water, etc. The accommodation cavity includes: the electrolysis cavity 111 and the deposition cavity 112. The electrolysis cavity 111 and the deposition cavity 112 are arranged vertically. The electrolysis cavity 111 is located above the deposition cavity 112, and the electrolysis cavity 111 and the deposition cavity 112 are separated by a partition (i.e., the first filtering unit 20 in the following text); that is, the electrolysis cavity 111 is above the first filtering unit 20 and the deposition cavity 112 is below it.

[0046] Further, the electrolysis cavity 111 is used to place the filter raw material 80 (the filter raw material 80 is a mixture of iron filings and activated carbon), and form a micro-electrolysis environment; the filter raw material 80 is circular particles stacked in the electrolysis cavity 111, and the particle diameter is 3 cm; the deposition cavity 112 is used to collect heavy particulate matters such as sediment in the waste liquid after electrolytic filtration.

[0047] The first filtering unit 20 is a 20-mesh perforated plate or a 20-mesh mesh structure, and the first filtering unit 20 is placed between the electrolysis cavity 111 and the deposition cavity 112; the first filtering unit 20 not only separates the upper and lower chambers, but also serves as a support layer for the filter raw material 80. The filter raw material 80 is laid and stacked on the first filtering unit 20, and a micro-electrolysis reaction occurs when the waste liquid passes through the iron-carbon layer.

[0048] The liquid inlet pipeline 30 penetrates into the filter chamber 10 from one side wall, and the liquid inlet pipeline 30 is connected to the electrolysis cavity 111 to ensure that the waste liquid can smoothly enter the electrolysis cavity 111. A flow control valve can also be provided on the liquid inlet pipeline 30 to adjust the flow rate of the waste liquid entering the system. Further, the end of the liquid inlet pipeline 30 away from the filter chamber 10 has a union joint for the movement and disassembly of the pretreatment device.

[0049] The liquid outlet pipeline 40 also penetrates out of the side wall of the filter chamber 10 and is connected to the electrolysis cavity 111. The liquid outlet pipeline 40 is used to discharge the waste liquid after micro-electrolysis treatment. Water quality monitoring equipment, such as on-line monitors for COD, ammonia nitrogen, etc., can be installed on the liquid outlet pipeline 40 to monitor the water quality of the effluent in real time. Further, the end of the liquid outlet pipeline 40 away from the filter chamber 10 has a union joint for the movement and disassembly of the pretreatment device.

[0050] Further, the connection between the liquid inlet pipeline 30 and the filter chamber 10 is arranged opposite to the connection between the liquid outlet pipeline 40 and the filter chamber 10.

[0051] In actual operation, the aquaculture wastewater enters the electrolysis chamber 111 through the liquid inlet pipeline 30 and comes into full contact with the filtering raw material 80. During this process, the wastewater is filtered. Then the filtered water flows out through the water outlet pipeline, and the impurities are deposited in the deposition chamber 112.

[0052] Iron-carbon microelectrolysis is a method that uses iron and carbon as materials and utilizes their electrochemical properties to carry out electrochemical reactions under microelectrolysis conditions to achieve efficient removal of harmful substances in wastewater. Specifically, the principle of the iron-carbon microelectrolysis technology mainly includes two aspects. One is the electrochemical properties of iron and carbon materials, and the other is the electrochemical reaction under microelectrolysis conditions. First of all, iron and carbon materials have good electrical conductivity and electrochemical activity, and can undergo oxidation-reduction reactions under the action of an external voltage. Secondly, under microelectrolysis conditions, the rate of the electrochemical reaction on the electrode surface is limited, making the electrochemical reaction more sufficient and uniform. Therefore, the iron-carbon microelectrolysis technology can efficiently convert harmful substances in water into harmless substances, achieving the purpose of purifying water quality. In wastewater treatment, the iron-carbon microelectrolysis technology can efficiently remove harmful substances such as heavy metal ions and organic substances in wastewater, and the microelectrolysis technology can convert harmful substances in sewage into harmless substances. That is, after the microelectrolysis of the iron-carbon filler, cleaner aquaculture wastewater that is not easily blocked in the pipeline is obtained, realizing the combination of planting and breeding for agricultural and forestry irrigation.

[0053] Specifically, during the iron-carbon microelectrolysis process, iron acts as the anode and undergoes an oxidation reaction under acidic conditions (aquaculture wastewater is usually acidic or can be adjusted to an appropriate pH value) to generate ferrous ions; while carbon acts as the cathode and undergoes a reduction reaction to produce nascent hydrogen and hydroxide ions. These products react with the pollutants in the wastewater through various actions such as oxidation-reduction, adsorption, and flocculation, improving the biodegradability of the wastewater.

[0054] Different from the prior art, the above technical solution can efficiently remove harmful substances such as heavy metal ions and organic substances in wastewater by electrolytically filtering the aquaculture wastewater located in the electrolysis chamber 111 through the settings of the electrolysis chamber 111 and the deposition chamber 112; at the same time, through the settings of the first filtering unit 20 and the upper and lower stratification of the two chambers, impurities in the waste liquid are screened out, suspended solids, sediment and other particulate matters in the wastewater are removed, and the deposition and scaling of these substances in the pipeline are reduced. At the same time, through the setting of the filtering raw material 80, the inner wall of the pipeline is prevented from scaling by electrolyzing the waste liquid, keeping the pipeline unobstructed.

[0055] According to some embodiments of the present application, with reference to Figures 1 to 2 and Figures 3 to 4, further comprising: a first cover 14, a sediment through-hole 12 penetrating through the filter chamber 10, and the sediment through-hole 12 communicating with the sedimentation chamber 112. A sediment through-hole 12 is provided on the sediment through-hole 12, and the first cover 14 is covered on the sediment through-hole 12. The sediment through-hole 12 is disposed through the bottom of the filter chamber 10.

[0056] The sediment through-hole 12 is disposed at the bottom or side wall position of the filter chamber 10 and communicates with the sedimentation chamber 112; preferably, the sediment through-hole 12 is disposed at the bottom of the filter chamber 10. The sediment through-hole 12 is multiple or one. The sediment through-hole 12 is used for regularly discharging the sediment and impurities deposited in the sedimentation chamber 112.

[0057] The first cover 14 is a lid with good sealing performance, and its shape and size match the sediment through-hole 12 preset on the bottom or side wall of the filter chamber 10. A sealing gasket or thread structure is designed at the edge of the first cover 14 to ensure tight combination with the sediment through-hole 12 and prevent leakage of waste liquid or gas.

[0058] When it is necessary to clean the sediment in the sedimentation chamber 112, the operator can open the first cover 14 to allow the sediment and impurities in the sedimentation chamber 112 to be discharged through the sediment through-hole 12. After cleaning, the first cover 14 is tightly covered back to restore the sealing performance of the device.

[0059] The aquaculture wastewater enters the electrolysis chamber 111 through the liquid inlet pipeline 30 and reacts with the filtering raw material 80 in the electrolysis chamber 111 to remove pollutants such as organic matters and heavy metal ions in the wastewater by micro-electrolysis. Along with the treatment of the wastewater, the sediment and larger particle impurities therein gradually settle into the sedimentation chamber 112 under the action of gravity through the first filtering unit 20. When the sediment in the sedimentation chamber 112 accumulates to a certain extent, the sediment is discharged by opening the first cover 14 to maintain the continuous and efficient operation of the device.

[0060] Through the arrangement of the first cover 14 and the sediment through-hole 12, the sediment and impurities in the sedimentation chamber 112 are regularly cleaned, avoiding the interference of these substances on the wastewater treatment process, thereby improving the treatment efficiency and stability of the entire pretreatment device.

[0061] According to some embodiments of the present application, with reference to Figure 3 and Figure 5 , further comprising: a backwashing pipeline 50 and two valves 60. One end of the backwashing pipeline 50 communicates with the liquid inlet pipeline 30, and the other end of the backwashing pipeline 50 communicates with the liquid outlet pipeline 40;

[0062] One of the valves 60 is disposed on the liquid inlet pipeline 30 and is located on the side of the backwashing pipeline 50 close to the filtration chamber 10; the other valve 60 is disposed on the liquid outlet pipeline 40 and is located on the side of the backwashing pipeline 50 away from the filtration chamber 10.

[0063] The backwashing pipeline 50 is an independent pipeline, one end of which is connected to the liquid inlet pipeline 30, and a valve 60 is provided after the connection point; the other end of the backwashing pipeline 50 is connected to the liquid outlet pipeline 40, and a valve 60 is provided after the connection point. That is, one valve 60 is disposed between the inlet end of the backwashing pipeline 50 and the filtration chamber 10, and the other valve 60 is disposed on the right side of the outlet end of the backwashing pipeline 50.

[0064] Backwashing operation: When backwashing is required, first close the valves 60 on the liquid inlet pipeline 30 and the liquid outlet pipeline 40, so that the washing liquid (which can be clean water or a cleaning agent with a specific formula) passes through the liquid inlet pipeline 30, the backwashing pipeline 50, and the liquid outlet pipeline 40 in sequence and enters the electrolysis chamber 111 to perform a reverse wash on the filtration raw material 80, the first filtration unit 20, and the second filtration unit 70 mentioned below in the electrolysis chamber 111. The waste liquid and impurities after washing are discharged through the liquid outlet pipeline 40 and / or the sediment through hole 12.

[0065] Specifically, after the water flow enters from the liquid inlet pipeline 30 on the left side, it flows upward and towards the liquid outlet pipeline 40, so that the water flow circulates in a clockwise direction from left to right to perform a backwash on this pretreatment device.

[0066] Regular backwashing operations can effectively remove impurities and blockages on the electrolysis chamber 111, the filtration raw material 80, the first filtration unit 20, and the second filtration unit 70, maintain their good filtration performance, and thus improve the filtration efficiency of the entire pretreatment device.

[0067] According to some embodiments of the present application, with reference to Figures 1 to 3 , it further includes: a second filtration unit 70, the second filtration unit 70 is disposed at the conduction position between the liquid inlet pipeline 30 and the filtration chamber 10, and the second filtration unit 70 is used to filter particles in the waste liquid.

[0068] Furthermore, the second filtration unit 70 includes: a filter screen 71 and a second cover body 72, a cleaning through hole 13 is penetrated through the filtration chamber 10, and the second cover body 72 is covered on the cleaning through hole;

[0069] The filter screen 71 is placed in the electrolysis chamber 111. The electrolysis chamber 111 includes: a first filtration chamber 1111 and a second filtration chamber 1112. The first filtration chamber 1111 is in communication with the liquid inlet pipeline 30 and the cleaning through-hole. The filter screen 71 is used to separate the first filtration chamber 1111 and the second filtration chamber 1112, and the filter screen 71 is used to filter and accommodate particles in the waste liquid.

[0070] The second filtration unit 70 includes: the filter screen 71 and the second cover body 72; the filter screen 71 has a mesh structure with 200 meshes, and is used to intercept particulate impurities in the waste liquid. The filter screen 71 is placed inside the electrolysis chamber 111 and divides the electrolysis chamber 111 into a first filtration chamber 1111 and a second filtration chamber 1112.

[0071] The second cover body 72 is a detachable lid, which is used to close the cleaning through-hole 13 provided on the filtration bin 10. The cleaning through-hole 13 allows the filter screen 71 to be cleaned or replaced.

[0072] Specifically, the electrolysis chamber 111 is divided into two sub-chambers by the filter screen 71: the first filtration chamber 1111 and the second filtration chamber 1112. The first filtration chamber 1111 is located before the filter screen 71, and the first filtration chamber 1111 is in communication with the liquid inlet pipeline 30 and the cleaning through-hole 13, and is used to initially receive and filter particles in the waste liquid. The second filtration chamber 1112 is located after the filter screen 71 and continues to carry the filtration raw material 80 for micro-electrolysis treatment. The first filtration chamber 1111 and the second filtration chamber 1112 are in communication through the mesh holes on the filter screen 71, and the waste water can reach the second filtration chamber 1112 through the mesh holes.

[0073] In actual operation, the waste liquid first enters the first filtration chamber 1111 through the liquid inlet pipeline 30, and the filter screen 71 intercepts and removes large particulate impurities. The filtered waste liquid then enters the second filtration chamber 1112 through the mesh holes of the filter screen 71. The waste liquid contacts the filtration raw material 80 in the electrolysis chamber 1111, and a micro-electrolysis reaction occurs to further purify the waste liquid. The treated waste liquid is finally discharged from the system through the liquid outlet pipeline 40.

[0074] When the filter screen 71 accumulates too many impurities and affects the filtration effect, the second cover body 72 can be opened, and the filter screen 71 can be cleaned or replaced by using the cleaning through-hole 13.

[0075] The second filtration unit 70 removes large particulate impurities in the waste liquid in advance through the filter screen 71 structure inside it, protecting the subsequent processing unit from blockage and wear. At the same time, the subdivision design of the electrolysis chamber 111 enables the micro-electrolysis reaction to occur in a purer waste liquid environment, improving the processing efficiency and effect.

[0076] In summary, the specific steps are as follows. The liquid inlet pipeline 30 is provided with a flexible connection to the liquid outlet pipeline 40, so that the pretreatment device can be flexibly connected to various wastewater treatment device equipment, facilitating movement, replacement, and adaptation to different connection requirements.

[0077] After the wastewater enters the device, it will first enter the first filtration chamber 1111, and be filtered and intercepted by the 200-mesh filter screen 71 to remove some crystalline crystals, solids, particulate matters, microorganisms, water scales, etc., for pretreating the wastewater. The cleaning through-hole 13 is also provided above the filter screen 71, facilitating the disassembly and cleaning of the filter screen 71 when it has adhered to too many impurities after being used for too long, preventing blockage.

[0078] After the wastewater is filtered by the filter screen 71, the relatively clean wastewater will enter the second filtration chamber 1112 filled with the filtration raw material 80 (iron-carbon filler) with a particle size of 3 cm. It is a technology for water treatment using the electrochemical principle, and its principle mainly involves two aspects: electrode reaction and electrolyte transfer. During the process of iron-carbon micro-electrolysis, iron and carbon are usually used as electrode materials. When an external voltage is applied to make the electrodes energized, redox reactions will occur on the electrode surfaces, causing the pollutants to be oxidized and reduced. In the case of iron-carbon micro-electrolysis, the introduction of current will cause the electrolyte to migrate and transfer near the electrodes. This transfer can promote the aggregation and reaction of pollutants near the electrodes, thereby achieving the removal of pollutants. At the same time, the electrolyte transfer can also affect the local environment near the electrode surface, changing the chemical properties of the electrode surface, which is conducive to promoting the degradation and removal of pollutants.

[0079] The deposition chamber 112 is provided below the electrolysis chamber 111 to receive and intercept and filter large-particle polluted impurities, etc. A 20-mesh stainless steel filter screen 71 (i.e., the first filtration unit 20) is installed at the junction of the electrolysis chamber 111 and the deposition chamber 112 to prevent the filtration raw material 80 from entering the deposition chamber 112 and for re-filtering the wastewater, facilitating the sedimentation of sediment in the wastewater. The first cover body 14 is installed at the bottom of the filtration chamber 10 to facilitate the cleaning of a large amount of sludge in the deposition chamber 112. The water flow is discharged from the water outlet after being pretreated along the direction of the filtration device.

[0080] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the various embodiments of the present application, and they should all be covered by the scope of the claims and the description of the present application. In particular, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A pipeline aquaculture wastewater pretreatment device based on iron-carbon micro-electrolysis, characterized in that: include: A filter chamber, wherein the filter chamber has a containing chamber, the containing chamber comprising: an electrolysis chamber and a sedimentation chamber, the electrolysis chamber is placed above the sedimentation chamber, and the electrolysis chamber is used to contain the filter raw material, and the sedimentation chamber is used to contain the sediment in the waste liquid; A first filter unit, the first filter unit is placed in the accommodating chamber, the first filter unit is used to separate the electrolysis chamber and the sedimentation chamber, and the first filter unit is used to place filter raw materials; A liquid inlet pipeline, the liquid inlet pipeline is arranged through the side wall of the filter chamber, the liquid inlet pipeline is connected to the electrolysis chamber, and the liquid inlet pipeline is used to supply waste liquid to the filter chamber; A liquid outlet pipeline is provided through the side wall of the filter bin and is communicated with the electrolysis chamber. The liquid outlet pipeline is used to discharge the filtered waste liquid.

2. According to claim 1, a pipeline aquaculture wastewater pretreatment device based on iron-carbon micro-electrolysis is characterized in that: Also includes: The first cover body has a sediment through hole that penetrates the filter bin, and the sediment through hole is communicated with the sediment chamber, a sediment through hole is arranged on the sediment through hole, and the first cover body is covered on the sediment through hole.

3. According to claim 2, a pipeline aquaculture wastewater pretreatment device based on iron-carbon micro-electrolysis is characterized in that: The sediment through hole is arranged through the bottom of the filter bin.

4. According to claim 1, a pipeline aquaculture wastewater pretreatment device based on iron-carbon micro-electrolysis is characterized in that: Also includes: A backwash pipeline and two valves, one end of the backwash pipeline is connected to the liquid inlet pipeline, and the other end of the backwash pipeline is connected to the liquid outlet pipeline; One of the valves is placed on the liquid inlet pipeline and between the input end of the backwash pipeline and the filter chamber; the other valve is placed on the liquid outlet pipeline and on the side of the output end of the backwash pipeline away from the filter chamber.

5. According to claim 1, a pipeline aquaculture wastewater pretreatment device based on iron-carbon micro-electrolysis is characterized in that: Also includes: The second filter unit is placed at the connection point between the liquid inlet pipeline and the filter bin, and is used for filtering particles in the waste liquid.

6. According to claim 5, a pipeline aquaculture wastewater pretreatment device based on iron-carbon micro-electrolysis is characterized in that: The second filter unit comprises: a filter screen and a second cover body, the filter bin is provided with a cleaning through hole, and the second cover body is covered on the cleaning through hole; The filter is placed in the electrolysis chamber, which includes: a first filter chamber and a second filter chamber, the first filter chamber is connected to the liquid inlet pipeline and the cleaning through hole, the filter is used to separate the first filter chamber and the second filter chamber, and the filter is used to filter and contain particles in the waste liquid.

7. According to claim 6, a pipeline aquaculture wastewater pretreatment device based on iron-carbon micro-electrolysis is characterized in that: The filter is a 200-mesh filter.

8. According to claim 1, a pipeline aquaculture wastewater pretreatment device based on iron-carbon micro-electrolysis is characterized in that: The first filtering unit is a 20-mesh filter.

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