Device for treating water paint emulsion through low-temperature wet oxidation

Abstract

The utility model discloses a device for treating water paint emulsion through low-temperature wet oxidation, which comprises a low-temperature wet oxidation device, the low-temperature wet oxidation device comprises a gas outlet pipeline and a gas inlet pipeline, the gas outlet pipeline and the gas inlet pipeline are fixedly inserted on the low-temperature wet oxidation device, the gas inlet pipeline is sleeved in the gas outlet pipeline, and the gas inlet pipeline is sleeved in the gas outlet pipeline; a middle partition plate is fixedly connected to the inner wall of the low-temperature wet type oxidation device, the middle-low-temperature wet type oxidation device is provided with a right side cavity and a left side cavity, and the middle partition plate and the left side cavity form a cavity with the leftward middle partition plate. Laminar flow is formed through emulsion and air by utilizing the oxidation filter bed on the left side, the oxygen contact surface is increased, and meanwhile, after air oxidation, only the molecular structure is damaged, the viscosity is reduced, and the flowability is improved. In the process, water disturbance is small, meanwhile, emulsion automatically remains to the bottom layer through gravity, the granularity of slag is guaranteed, slag separation is easier, a small amount of air is needed in one-time oxidation, energy consumption is low, and no oxidizing agent is consumed.

Description

Technical Field

[0001] The utility model relates to the technical field of water-based paint emulsion treatment, in particular to a device for low-temperature wet oxidation treatment of water-based paint emulsion. Background Art

[0002] Water-based paint is a water-dispersible paint containing modified resins and surfactants. Compared with traditional paints containing harmful substances such as xylene, benzene, and formaldehyde, water-based paint is environmentally friendly, has the advantages of wear resistance, aging resistance, good flexibility, and easy use, and has less harm to human health. Therefore, the use of water-based paint is becoming more and more widespread. However, in the process of water-based paint production, the problem of wastewater treatment also becomes prominent. Water-based paint includes three types: water-soluble, water-dilutable, and water-dispersible (latex paint). The water-soluble type uses water-soluble resin as a film-forming material, represented by polyvinyl alcohol and its various modified products. In addition, there are water-soluble alkyd resins, water-soluble epoxy resins, and inorganic polymer water-based resins. The water-dilutable type refers to a paint prepared with a post-emulsified emulsion as a film-forming material, so that the solvent-based resin is dissolved in an organic solvent, and then with the help of an emulsifier, the resin is dispersed in water by strong mechanical stirring to form an emulsion, which is called a post-emulsified emulsion. The paint can be diluted with water during construction. Water-dispersible paint mainly refers to paints prepared with synthetic resin emulsion as film-forming material. Emulsion refers to a dispersed emulsion composed of small particles of unsaturated vinyl monomers polymerized under certain temperature conditions and dispersed in water during mechanical stirring in the presence of an emulsifier. Water-based paint spraying wastewater contains not only a large amount of paint mist particles, suspended matter, and organic pollutants, but also some difficult-to-treat organic solvents and emulsions. The wastewater composition is complex and the color changes greatly. The current processes used for spraying wastewater treatment mainly include paint mist flocculant (AB agent) method, ordinary precipitation method, filtration separation method, etc.

[0003] The conventional methods of filtration and low-temperature oxidation are usually used to treat paint mist particles, suspended matter and organic pollutants in water-based paint spraying wastewater. Conventional filtration methods are prone to cause the filter material to become compacted or cause the quartz sand filter to be interrupted or laminar, and secondary methods are required to treat the high-concentration COD in the filtrate. Conventional low-temperature oxidation methods will release heat excessively during direct oxidation, and the released heat needs to be recovered through a heat exchanger. However, the emulsion is viscous, and when passing through the heat exchanger tube, the friction resistance is large and the mechanical energy loss is serious. Direct oxidation generally requires the addition of external stirring facilities to improve the uniform mixing of the oxidant and water. Utility Model Content

[0004] The purpose of this section is to summarize some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and utility model name of this application to avoid blurring the purpose of this section, specification abstract and utility model name, and such simplifications or omissions cannot be used to limit the scope of the utility model.

[0005] Therefore, the purpose of the utility model is to provide a device for treating water-based paint emulsion by low-temperature wet oxidation, in order to solve the problem that "the conventional means of filtration and low-temperature oxidation are usually used to treat paint mist particles, suspended matter and organic pollutants in water-based paint spraying wastewater. Conventional filtration methods are prone to cause filter material compaction or cause quartz sand filter to be interrupted or laminar, and secondary means are required to treat high-concentration COD in the filtrate. Conventional low-temperature oxidation methods will release heat excessively during direct oxidation, and the released heat needs to be recovered through a heat exchanger. However, the emulsion is viscous, and when passing through the heat exchanger tube, the friction resistance is large and the mechanical energy loss is serious. Direct oxidation generally requires the addition of external stirring facilities to improve the uniform mixing of the oxidant and water."

[0006] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0007] A device for low-temperature wet oxidation treatment of water-based paint emulsion, comprising:

[0008] A low-temperature wet oxidation device, comprising an air outlet pipe and an air inlet pipe, both of which are fixedly inserted into the low-temperature wet oxidation device, the air inlet pipe is sleeved in the air outlet pipe, a middle partition is fixedly connected to the inner wall of the low-temperature wet oxidation device, the low-temperature wet oxidation device is provided with a right chamber and a left chamber, the middle partition and the left chamber form a middle partition to the left chamber, the middle partition and the right chamber form a middle partition to the right chamber, a left feed pipe is fixedly inserted into the side wall of the low-temperature wet oxidation device, a porous distributor is installed in the left feed pipe, and a first ceramic filter plate is provided in the left chamber , a second ceramic filter plate, and a third ceramic filter plate. The first ceramic filter plate, the second ceramic filter plate, and the third ceramic filter plate are respectively fixedly connected to the inner wall and the middle partition plate of the left chamber. The lower end of the first ceramic filter plate is fixedly connected to the first bottom plate, the lower end of the second ceramic filter plate is fixedly connected to the second support plate, and the lower end of the third ceramic filter plate is fixedly connected to the third support plate. The first ceramic filter plate and the first bottom plate are jointly fixedly connected to the first side guard plate, the second ceramic filter plate and the second support plate are jointly fixedly connected to the second side guard plate, and the third ceramic filter plate and the third support plate are fixedly connected to the third side guard plate.

[0009] As a preferred solution of the device for low-temperature wet oxidation treatment of water-based paint emulsion described in the utility model, wherein: a first connecting pipe, a second connecting pipe and a third connecting pipe are fixedly inserted on the side wall of the middle partition, the first connecting pipe is fixedly connected to the first water outlet pipe, the second connecting pipe is fixedly connected to the second water outlet pipe, and the third connecting pipe is fixedly connected to the third water outlet pipe.

[0010] As a preferred scheme of the device for low-temperature wet oxidation treatment of water-based paint emulsion described in the utility model, wherein: the first ceramic filter plate, the first bottom plate, the second ceramic filter plate, the second abutment plate, the third ceramic filter plate, the first side guard plate, the second side guard plate and the third side guard plate together constitute an oxidation filter bed, the inclination angle of the oxidation filter bed is θ, the viscosity of the water-based paint emulsion is μ, and the pressure difference between the inside and outside of the oxidation filter bed is Δp.

[0011] As a preferred solution of the device for treating water-based paint emulsion by low-temperature wet oxidation described in the utility model, a drain pipe, a first oxidant feed pipe, a second oxidant feed pipe and a third oxidant feed pipe are fixedly inserted on the side wall of the low-temperature wet oxidation device, the drain pipe is connected to the right chamber, the first oxidant feed pipe is connected to the first connecting pipe, the second oxidant feed pipe is connected to the second connecting pipe, and the third oxidant feed pipe is connected to the third connecting pipe.

[0012] As a preferred solution of the device for treating water-based paint emulsion by low-temperature wet oxidation described in the utility model, the low-temperature wet oxidation device is fixedly interspersed with a slag discharge pipe, the slag discharge pipe is connected to the left chamber, the air outlet pipe is connected to the right chamber, and the air inlet pipe is connected to the left chamber.

[0013] As a preferred scheme of the device for low-temperature wet oxidation treatment of water-based paint emulsion described in the utility model, the pore size of the first ceramic filter plate, the second ceramic filter plate and the third ceramic filter plate is 100-400 mesh, and the height of the first side guard plate, the second side guard plate and the third side guard plate is 5-10 cm.

[0014] Beneficial effects of the utility model:

[0015] 1. Use the left oxidation filter bed to form laminar flow through the emulsion and air to increase the oxygen contact surface. At the same time, after air oxidation, only the molecular structure is destroyed, the viscosity is reduced, and the fluidity is improved. The water disturbance in this process is small, and the emulsion is retained to the bottom layer by gravity. The emulsion is demulsified from the top layer to the bottom layer. After the demulsification process is achieved, the water phase is driven by compressed air pressure to pass through the first ceramic filter plate, the second ceramic filter plate and the third ceramic filter plate into the filtrate receiving chamber. As the viscosity decreases, the hydraulic flow thrust gradually increases, pushing the slag to the bottom, ensuring the separation of the slag and water, ensuring the slag particle size, and making it easier to separate the slag. A small amount of air is required for one oxidation, with low energy consumption and no oxidant consumption;

[0016] 2. The right chamber is a normal pressure chamber. After the oxidant on the right side releases heat through oxidation, the water temperature in the right chamber rises, and the heat energy is transferred to the filtrate receiving chamber in the left chamber through the water body, so as to achieve the purpose of heating the emulsion in the left chamber, reduce the heat exchanger, save energy consumption, and reduce heat energy loss;

[0017] 3. The gas solubility of the filtrate in the left chamber 303 is high after being pressurized. When it flows to the right chamber 303, it will release gas instantly, forming a small amount of small bubbles, increasing the disturbance of the water body and promoting the uniform distribution of the oxidant;

[0018] 4. By using different flow rates of the first water outlet pipe 3023, the second water outlet pipe 3025 and the third water outlet pipe 3027, the concentration of hydrogen peroxide is distributed in a step-by-step manner along with the oxidation concentration, so that continuous addition of hydrogen peroxide can be achieved and the internal circulation system can be removed at the same time;

[0019] 5. The air inlet pipe of the left chamber and the air outlet pipe of the right chamber are in the form of sleeves. The warm air of the right chamber is used to preheat the air inlet of the left chamber to realize the recovery of gas heat energy. At the same time, the cold source air of the left chamber is used to cool the steam in the drain pipe of the right chamber to avoid water evaporation. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following briefly introduces the drawings required for the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0021] Figure 1 This is a schematic diagram of the front structure of a device for treating water-based paint emulsion by low-temperature wet oxidation proposed by the utility model;

[0022] Figure 2 This is a side view of the partition toward the left chamber in a device for low-temperature wet oxidation treatment of water-based paint emulsion proposed by the utility model;

[0023] Figure 3 This is a side view of the partition toward the right chamber in a device for low-temperature wet oxidation treatment of water-based paint emulsion proposed by the utility model;

[0024] Figure 4 The utility model provides a schematic diagram of the three-dimensional structure of an air outlet pipe and an air inlet pipe in a device for treating water-based paint emulsion by low-temperature wet oxidation.

[0025] In the figure: 1, air outlet pipe; 2, air inlet pipe; 3, low temperature wet oxidation device; 301, middle partition; 301a, middle partition to left chamber; 301b, middle partition to right chamber; 3011, first connecting pipe; 3012, second connecting pipe; 3013, third connecting pipe; 302, right chamber; 3021, drain pipe; 3022, first oxidant feed pipe; 3023, first water outlet pipe; 3024, second oxidant feed pipe; 3025, second water outlet pipe; 3026, second oxidant feed pipe; 3027, third oxidant feed pipe; 3028, third oxidant feed pipe; 3029, third oxidant feed pipe; 3030, third oxidant feed pipe; 3031, third oxidant feed pipe; 3032, third oxidant feed pipe; 3033, third oxidant feed pipe; 3034, third oxidant feed pipe; 3035, third oxidant feed pipe; 3036, third oxidant feed pipe; 3037, third oxidant feed pipe; 3038, third oxidant feed pipe; 3039, third oxidant feed pipe; 3040, third oxidant feed pipe; 3041, third oxidant feed pipe; 3042, third oxidant feed pipe; 3043, third oxidant feed pipe; 3044, third oxidant feed pipe; 3045, third oxidant feed pipe; 3046, third oxidant feed pipe; 3047, third oxidant feed pipe; 3048, third oxidant feed pipe; 3049, third oxidant feed pipe; 3050, third oxidant feed pipe; 3051, third oxidant feed pipe; 3052, third oxidant feed pipe; 3053 026, the third oxidant feed pipe; 3027, the third water outlet pipe; 303, the left chamber; 3031, the left feed pipe; 30311, the porous distributor; 3032, the first ceramic filter plate; 3033, the first bottom plate; 3034, the second ceramic filter plate; 3035, the second abutment plate; 3036, the third ceramic filter plate; 3037, the third abutment plate; 3038, the slag discharge pipe; 3039, the first side guard plate; 3040, the second side guard plate; 3041, the third side guard plate. DETAILED DESCRIPTION

[0026] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0027] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0028] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0029] Secondly, the present invention is described in detail with reference to the schematic diagram. When describing the embodiments of the present invention, for the sake of convenience, the cross-sectional diagrams showing the device structure will not be partially enlarged according to the general scale, and the schematic diagrams are only examples, which should not limit the scope of protection of the present invention. In addition, in actual production, the three-dimensional dimensions of length, width and depth should be included.

[0030] Reference Figure 1-4 The utility model provides a device for low-temperature wet oxidation treatment of water-based paint emulsion, comprising:

[0031] A low-temperature wet oxidation device 3 includes an air outlet pipe 1 and an air inlet pipe 2, both of which are fixedly inserted into the low-temperature wet oxidation device 3, and the air inlet pipe 2 is sleeved in the air outlet pipe 1. A middle partition plate 301 is fixedly connected to the inner wall of the low-temperature wet oxidation device 3, and the low-temperature wet oxidation device 3 is provided with a right chamber 302 and a left chamber 303. The middle partition plate 301 and the left chamber 303 form a middle partition plate to the left chamber 301a, and the middle partition plate 301 and the right chamber 302 form a middle partition plate to the right chamber 301b. A left feed pipe 3031 is fixedly inserted into the side wall of the low-temperature wet oxidation device 3, and a porous distributor 30311 is installed in the left feed pipe 3031. A first ceramic filter plate 3032, a second ceramic filter plate 3034, and a third ceramic filter plate 3036 are provided in the left chamber 303. The first ceramic filter plate 3032, the second ceramic filter plate 3034, and the third ceramic filter plate 3036 are provided in the left chamber 303. The plate 3034 and the third ceramic filter plate 3036 are respectively fixedly connected to the inner wall of the left chamber 303 and the middle partition plate 301, the lower end of the first ceramic filter plate 3032 is fixedly connected to the first bottom plate 3033, the lower end of the second ceramic filter plate 3034 is fixedly connected to the second abutment plate 3035, the lower end of the third ceramic filter plate 3036 is fixedly connected to the third abutment plate 3037, the first ceramic filter plate 3032 and the first bottom plate 3033 are fixedly connected to the first side guard plate 3039, the second ceramic filter plate 3034 and the second abutment plate 3035 are fixedly connected to the second side guard plate 3040, the third ceramic filter plate 3036 and the third abutment plate 3037 are fixedly connected to the third side guard plate 3041, and the left oxidation filter bed is used to form a laminar flow through the emulsion and air to increase the oxygen contact surface. At the same time, after air oxidation, only the molecular structure is destroyed, the viscosity is reduced, and the fluidity is improved. The water body disturbance is small in this process, and the emulsion is retained to the bottom layer by gravity. The emulsion is demulsified from the top layer to the bottom layer. After the demulsification process is achieved, the water phase is driven by compressed air pressure to pass through the first ceramic filter plate 3032, the second ceramic filter plate 3034 and the third ceramic filter plate 3036 into the filtrate receiving chamber. As the viscosity decreases, the hydraulic flow thrust gradually increases, pushing the slag to the bottom, ensuring the separation of the slag and water, ensuring the slag particle size, making it easier to separate the slag. A small amount of air is required for one oxidation, with low energy consumption and no oxidant consumption.

[0032] Among them, the first connecting pipe 3011, the second connecting pipe 3012 and the third connecting pipe 3013 are fixedly inserted on the side wall of the middle partition 301, the first connecting pipe 3011 is fixedly connected to the first water outlet pipe 3023, the second connecting pipe 3012 is fixedly connected to the second water outlet pipe 3025, the third connecting pipe 3013 is fixedly connected to the third water outlet pipe 3027, the first oxidant feed pipe 3022, the second oxidant feed pipe 3024 and the third oxidant feed pipe 3026 are connected to the first connecting pipe 3011, the second connecting pipe 3012 and the third connecting pipe 3013 at the bottom of the oxidation filter bed in the left chamber 303, and are discharged from the first water outlet pipe 3023, the second water outlet pipe 3025 and the third water outlet pipe 3027 in the form of jet mixing.

[0033] Furthermore, the first ceramic filter plate 3032, the first bottom plate 3033, the second ceramic filter plate 3034, the second abutment plate 3035, the third ceramic filter plate 3036, the first side guard plate 3039, the second side guard plate 3040 and the third side guard plate 3041 together constitute an oxidation filter bed, the inclination angle of the oxidation filter bed is θ, the viscosity of the water-based paint emulsion is μ, the pressure difference between the inside and outside of the oxidation filter bed is Δp, and the relationship between the three is: γ is a constant with a value of (0.5 to 3).

[0034] Furthermore, a drain pipe 3021, a first oxidant feed pipe 3022, a second oxidant feed pipe 3024 and a third oxidant feed pipe 3026 are fixedly inserted on the side wall of the low-temperature wet oxidation device 3, the drain pipe 3021 is connected to the right chamber 302, the first oxidant feed pipe 3022 is connected to the first connecting pipe 3011, the second oxidant feed pipe 3024 is connected to the second connecting pipe 3012, and the third oxidant feed pipe 3026 is connected to the third connecting pipe 3013, and the oxidant is added to the right chamber 302 through the first oxidant feed pipe 3022, the second oxidant feed pipe 3024 and the third oxidant feed pipe 3026.

[0035] Furthermore, the low-temperature wet oxidation device 3 is fixedly interspersed with a slag discharge pipe 3038, the slag discharge pipe 3038 is connected to the left chamber 303, the air outlet pipe 1 is connected to the right chamber 302, the air inlet pipe 2 is connected to the left chamber 303, the air inlet pipe 2 of the left chamber 303 and the air outlet pipe 1 of the right chamber 302 are in the form of a sleeve, and the warm air of the right chamber 302 is used to preheat the intake air of the left chamber 303 to realize the recovery of gas thermal energy. At the same time, the cold source air of the left chamber 303 is used to cool the steam in the drain pipe 3021 of the right chamber 302 to avoid water evaporation.

[0036] Furthermore, the apertures of the first ceramic filter plate 3032, the second ceramic filter plate 3034 and the third ceramic filter plate 3036 are 100-400 meshes, and the heights of the first side guard plate 3039, the second side guard plate 3040 and the third side guard plate 3041 are 5-10 cm.

[0037] During use, the water-based paint emulsion enters from the left feed pipe 3031, and the oxidant is added to the right chamber 302 through the first oxidant feed pipe 3022, the second oxidant feed pipe 3024 and the third oxidant feed pipe 3026. It is evenly fed to the top through the porous distributor 30311 on the left feed pipe 3031, flows from the head of the top oxidation filter bed to the tail, slides down to the middle oxidation filter bed, and then to the bottom oxidation filter bed. The oxidant in the right chamber 302 passes through the first oxidant feed pipe 3022, the second oxidant feed pipe 3024 and the third oxidant feed pipe 3026 and the bottom of the oxidation filter bed in the left chamber 303. The first connecting pipe 3011, the second connecting pipe 3012 and the third connecting pipe 3013 are connected, and are discharged from the first water outlet pipe 3023, the second water outlet pipe 3025 and the third water outlet pipe 3027 in the form of jet mixing. In this design, the oxidation filter bed forms a laminar flow through the emulsion and air to increase the oxygen contact surface. At the same time, after air oxidation, only the molecular structure is destroyed, the viscosity is reduced, and the fluidity is improved, and the emulsion is demulsified from the top layer to the bottom layer. After the process demulsification is achieved, the water phase is driven by compressed air pressure to pass through the first ceramic filter plate 3032, the second ceramic filter plate 3034 and the third ceramic filter plate 3036 into the filtrate receiving chamber. As the viscosity decreases, the hydraulic flow thrust gradually increases, pushing the slag to the bottom, ensuring the separation of the slag and water, ensuring the slag particle size, making it easier to separate the slag, and requiring a small amount of air for one oxidation, with low energy consumption and no oxidant consumption; the right chamber 302 is a normal pressure chamber, and the water temperature in the right chamber 302 rises after the oxidant oxidizes and releases heat, and the heat energy is transferred to the filtrate receiving chamber of the left chamber 303 through the water body, so as to achieve the purpose of heating the emulsion in the left chamber 302 and reduce the heat exchanger. When the filtrate in the left chamber 303 is pressurized, the gas solubility of the filtrate is high, and when it flows to the right chamber 303, the gas is released instantly to form a small amount of small bubbles, which increases the disturbance of the water body and promotes the uniform distribution of the oxidant. At the same time, the flow rates of the first water outlet pipe 3023, the second water outlet pipe 3025 and the third water outlet pipe 3027 are different, so that the concentration of hydrogen peroxide is distributed in a step-by-step manner with the oxidation concentration, so that continuous addition of hydrogen peroxide can be achieved and the internal circulation system can be removed at the same time.

[0038] It should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A device for low-temperature wet oxidation treatment of water-based paint emulsion, characterized in that: include: A low-temperature wet oxidation device (3) comprises an air outlet pipe (1) and an air inlet pipe (2), wherein the air outlet pipe (1) and the air inlet pipe (2) are both fixedly inserted into the low-temperature wet oxidation device (3), the air inlet pipe (2) is sleeved in the air outlet pipe (1), a middle partition plate (301) is fixedly connected to the inner wall of the low-temperature wet oxidation device (3), the low-temperature wet oxidation device (3) is provided with a right chamber (302) and a left chamber (303), the middle partition plate (301) ) and the left chamber (303) form a middle partition to the left chamber (301a), the middle partition (301) and the right chamber (302) form a middle partition to the right chamber (301b), a left feed pipe (3031) is fixedly inserted on the side wall of the low-temperature wet oxidation device (3), a porous distributor (30311) is installed in the left feed pipe (3031), and a first ceramic filter plate (3032), a second ceramic filter plate (3031) are arranged in the left chamber (303). 034), and a third ceramic filter plate (3036). The first ceramic filter plate (3032), the second ceramic filter plate (3034), and the third ceramic filter plate (3036) are respectively fixedly connected to the inner wall of the left chamber (303) and the middle partition plate (301). The lower end of the first ceramic filter plate (3032) is fixedly connected to the first bottom plate (3033), and the lower end of the second ceramic filter plate (3034) is fixedly connected to the second abutment plate (3035). The lower end of the third ceramic filter plate (3036) is fixedly connected to a third abutment plate (3037), the first ceramic filter plate (3032) and the first bottom plate (3033) are jointly fixedly connected to a first side guard plate (3039), the second ceramic filter plate (3034) and the second abutment plate (3035) are jointly fixedly connected to a second side guard plate (3040), and the third ceramic filter plate (3036) and the third abutment plate (3037) are fixedly connected to a third side guard plate (3041).

2. The device for treating water-based paint emulsion by low-temperature wet oxidation according to claim 1, characterized in that: A first connecting pipe (3011), a second connecting pipe (3012) and a third connecting pipe (3013) are fixedly inserted into the side wall of the middle partition plate (301); the first connecting pipe (3011) is fixedly connected to a first water outlet pipe (3023); the second connecting pipe (3012) is fixedly connected to a second water outlet pipe (3025); and the third connecting pipe (3013) is fixedly connected to a third water outlet pipe (3027).

3. The device for treating water-based paint emulsion by low-temperature wet oxidation according to claim 1, characterized in that: The first ceramic filter plate (3032), the first bottom plate (3033), the second ceramic filter plate (3034), the second abutment plate (3035), the third ceramic filter plate (3036), the first side guard plate (3039), the second side guard plate (3040) and the third side guard plate (3041) together constitute an oxidation filter bed, the inclination angle of the oxidation filter bed is θ, the viscosity of the water-based paint emulsion is μ, and the pressure difference between the inside and outside of the oxidation filter bed is Δp.

4. The device for treating water-based paint emulsion by low-temperature wet oxidation according to claim 1, characterized in that: A drainage pipe (3021), a first oxidant feed pipe (3022), a second oxidant feed pipe (3024) and a third oxidant feed pipe (3026) are fixedly inserted on the side wall of the low-temperature wet oxidation device (3); the drainage pipe (3021) is connected to the right chamber (302); the first oxidant feed pipe (3022) is connected to the first connecting pipe (3011); the second oxidant feed pipe (3024) is connected to the second connecting pipe (3012); and the third oxidant feed pipe (3026) is connected to the third connecting pipe (3013).

5. The device for treating water-based paint emulsion by low-temperature wet oxidation according to claim 1, characterized in that: The low-temperature wet oxidation device (3) is fixedly interspersed with a slag discharge pipe (3038), the slag discharge pipe (3038) is connected to the left chamber (303), the air outlet pipe (1) is connected to the right chamber (302), and the air inlet pipe (2) is connected to the left chamber (303).

6. The device for treating water-based paint emulsion by low-temperature wet oxidation according to claim 1, characterized in that: The apertures of the first ceramic filter plate (3032), the second ceramic filter plate (3034) and the third ceramic filter plate (3036) are 100 to 400 meshes, and the heights of the first side guard plate (3039), the second side guard plate (3040) and the third side guard plate (3041) are 5 to 10 cm.

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