A wastewater treatment device

Abstract

The application provides a wastewater treatment device, which comprises a sedimentation tank, a reaction tank, a first centrifugal pump, a modified ceramic membrane assembly and a clean water tank. The reaction tank is connected with the sedimentation tank. The first centrifugal pump is arranged on the reaction tank, and the water inlet end of the first centrifugal pump extends into the reaction tank. The modified ceramic membrane assembly is arranged on the reaction tank and connected with the water outlet end of the first centrifugal pump. The clean water tank is connected with the reaction tank through the first centrifugal pump and the modified ceramic membrane assembly, and the bottom of the clean water tank is connected with the reaction tank. The clean water tank and the reaction tank are connected through pipelines to form a closed cycle. Sewage can repeatedly pass through the modified ceramic membrane assembly for catalytic oxidation degradation, the contact time of the sewage and the oxidant with the modified ceramic membrane is greatly prolonged, the catalytic oxidation degradation is more sufficient, the loss of the catalyst is reduced, and the oxidation degradation efficiency of peroxiacetic acid is improved.

Description

Technical Field

[0001] This application relates to a wastewater treatment device, and more particularly to a wastewater treatment device. Background Technology

[0002] In recent years, with the rapid development of chemical, medical, and agricultural industries, a large amount of toxic wastewater has been generated. This wastewater contains a large amount of emerging organic pollutants that are difficult to remove, such as antibiotics, neonicotinoids, and perfluorinated compounds. Existing research indicates that these difficult-to-remove emerging organic pollutants can be removed by oxidizing the large amounts of acetoxy radicals (CH3C(O)O·) and peroxyacetyl radicals (CH3C(O)OO·) generated by activating peracetic acid. In recent years, ceramic membranes have been increasingly used in the water treatment industry, and membrane catalysis has been extensively studied in scientific research. Traditional advanced oxidation technologies suffer from catalyst loss and difficulty in recovery, and may themselves pollute water bodies. Utility Model Content

[0003] This application provides a wastewater treatment device to solve the problems existing in related technologies. The technical solution is as follows:

[0004] This application provides a wastewater treatment device, including:

[0005] Sedimentation tank;

[0006] A reaction tank, which is connected to the sedimentation tank;

[0007] A first centrifugal pump is installed on the reaction tank, and the inlet end of the first centrifugal pump extends into the reaction tank.

[0008] A modified ceramic membrane module is disposed on the reaction tank and is connected to the outlet of the first centrifugal pump.

[0009] A clear water tank is connected to the reaction tank via the first centrifugal pump and the modified ceramic membrane assembly, and the bottom of the clear water tank is connected to the reaction tank.

[0010] In one implementation,

[0011] Box body;

[0012] A partition is disposed inside the box, dividing the box into two spaces;

[0013] A ceramic membrane support, wherein the ceramic membrane support is disposed within the housing;

[0014] A plurality of ceramic membranes are disposed on the ceramic membrane support and disposed within one side space of the partition plate, and each of the ceramic membranes is provided with a pipe.

[0015] A plurality of modified ceramic membranes are disposed on the ceramic membrane support, and the plurality of modified ceramic membranes are all located in a space away from the ceramic membrane. Wastewater passes through the ceramic membrane and is then transported to the modified ceramic membrane through a pipeline.

[0016] A water inlet pipe is provided on the housing and is connected to the outlet of the first centrifugal pump.

[0017] A water outlet pipe is installed on the box body. Wastewater passes through several modified ceramic membranes and is then output through the water outlet pipe, which is connected to the clear water tank.

[0018] In one implementation,

[0019] Each of the modified ceramic membranes has a number of small pores. The surface of the modified ceramic membrane and the small pores are loaded with a catalyst. After the wastewater passes through the small pores on the surface of the modified ceramic membrane, it is discharged to the outlet pipe.

[0020] Specifically, the ceramic membrane is an inorganic material with a stable structure, allowing the catalyst to be firmly loaded onto its surface or within its pores. Compared to suspended or powdered catalysts, it does not cause secondary pollution and is easy to recycle and regenerate. Furthermore, the catalyst on the ceramic membrane surface catalyzes and activates peracetic acid, thereby reducing the adsorption or deposition of pollutants (such as organic matter, oils, and microorganisms) on the ceramic membrane surface, extending the membrane's cleaning cycle and service life, and reducing operating costs.

[0021] The modified ceramic membrane can also catalytically activate and remove recalcitrant organic matter (such as pesticides, dyes, and drugs), resulting in a significant reduction in COD and facilitating compliance with emission standards.

[0022] In one implementation, it further includes:

[0023] A stirring assembly is disposed on the reaction tank, and the stirring end of the stirring assembly is located inside the reaction tank.

[0024] In one implementation, it further includes:

[0025] A reagent storage tank is installed on the sedimentation tank and is connected to the interior of the sedimentation tank via a pipe.

[0026] In one implementation, it further includes:

[0027] A second centrifugal pump, the inlet of which extends into the sedimentation tank, and the outlet of which extends into the reaction tank;

[0028] The flared end is located on the inlet end of the second centrifugal pump.

[0029] In one implementation, it further includes:

[0030] An oxidant storage tank is installed on the reaction tank and is connected to the reaction tank via a pipeline.

[0031] In one implementation, it further includes:

[0032] A reflux pump is installed between the clear water tank and the reaction tank, and the clear water tank and the reaction tank are connected by the reflux pump.

[0033] In one implementation, it further includes:

[0034] A one-way valve is provided in the reflux pump.

[0035] In one implementation,

[0036] The reaction tank has a water outlet, and a pipe is installed on the water outlet.

[0037] The advantages or beneficial effects of the above technical solutions include at least the following:

[0038] The clear water tank and reaction tank of this device are connected by pipelines to form a closed loop. Wastewater can be repeatedly passed through the modified ceramic membrane module for catalytic oxidation degradation, which greatly extends the contact time between wastewater and oxidant with the modified ceramic membrane, making the catalytic oxidation degradation more complete, reducing catalyst loss, and improving the efficiency of peracetic acid oxidation degradation.

[0039] Ceramic membranes possess advantages such as high mechanical strength, oxidation resistance, corrosion resistance, and stability. By loading a Co-Fe-Mn catalyst into the ceramic membrane structure, this modified ceramic membrane can be viewed as a microreactor catalyzing the oxidation of organic matter by peracetic acid. The catalyst is uniformly distributed on the membrane channels and surface, increasing the specific surface area and thus improving mass transfer efficiency, enabling faster and more thorough degradation of organic matter. Furthermore, it can oxidize and decompose organic pollutants accumulated on the membrane surface, effectively mitigating membrane fouling. In addition, the Co-Fe-Mn bilayer metal hydroxide catalyst on the modified ceramic membrane surface and channels is rich in oxygen vacancies. These oxygen vacancies promote the migration of oxygen species, thereby facilitating the activated degradation of peracetic acid (PAA).

[0040] The modified ceramic membrane module and the reaction tank are separate structures, allowing for easy cleaning or replacement of the ceramic membranes. The modified ceramic membrane module contains multiple modified ceramic membranes, significantly increasing the reaction contact area and improving reaction efficiency. Each modified ceramic membrane is independent, with its own outlet pipe, and can be removed individually, reducing the difficulty of maintenance and replacement of flat-plate ceramic membrane water purification systems. Furthermore, the modified ceramic membrane and the conventional ceramic membrane are placed in a separate housing, isolated by a partition. Wastewater passes through the ceramic membrane first and then through the modified ceramic membrane. This allows the ceramic membrane to trap larger particles of pollutants, preventing clogging and minimizing membrane wear.

[0041] The above overview is for illustrative purposes only and is not intended to be limiting in any way. Further aspects, embodiments, and features of this application will become readily apparent from the accompanying drawings and the following detailed description, in addition to the illustrative aspects, embodiments, and features described above. Attached Figure Description

[0042] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the various drawings denote the same or similar parts or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings depict only some embodiments disclosed in this application and should not be construed as limiting the scope of this application.

[0043] Figure 1 This is a schematic diagram of the structure of this utility model;

[0044] Figure 2 for Figure 1 A schematic diagram of the structure of a medium-modified ceramic membrane module;

[0045] 100. Wastewater treatment equipment;

[0046] 110. Sedimentation tank; 111. Chemical storage tank; 112. Second centrifugal pump; 113. Bell mouth;

[0047] 120. Reaction tank; 121. First centrifugal pump; 122. Oxidant storage tank;

[0048] 130. Modified ceramic membrane module; 131. Box body; 132. Ceramic membrane support; 133. Modified ceramic membrane; 134. Inlet pipe; 135. Outlet pipe; 136. Partition plate; 137. Ceramic membrane;

[0049] 140. Clear water tank; 141. Return pump; 142. Check valve; 143. Water outlet;

[0050] 150. Stirring components. Detailed Implementation

[0051] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of this application. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0052] Figures 1-2 This diagram illustrates the structure of a wastewater treatment apparatus 100 according to an embodiment of this application. Figures 1-2 As shown, the wastewater treatment device 100 may include:

[0053] Sedimentation tank 110;

[0054] The reaction tank 120 is connected to the sedimentation tank 110;

[0055] A first centrifugal pump 121 is mounted on the reaction tank 120, and the inlet end of the first centrifugal pump 121 extends into the reaction tank 120.

[0056] A modified ceramic membrane module 130 is disposed on the reaction tank 120 and is connected to the outlet end of the first centrifugal pump 121.

[0057] The clear water tank 140 is connected to the reaction tank 120 via the first centrifugal pump 121 and the modified ceramic membrane assembly 130, and the bottom of the clear water tank 140 is connected to the reaction tank 120.

[0058] In this embodiment, during use, wastewater is first added to sedimentation tank 110 along with a precipitant to allow impurities to settle in sedimentation tank 110. Then, the wastewater is transferred to reaction tank 120. After the wastewater enters reaction tank 120, an oxidant is added to reaction tank 120. The oxidant and wastewater are stirred in reaction tank 120. After thorough stirring, the wastewater is pumped out by first centrifugal pump 121. The pumped wastewater undergoes rapid catalytic reaction and degradation of organic pollutants through modified ceramic membrane module 130. After the reaction is complete, it is transported to clear water tank 140. Clear water tank 140 can either return the clear water to reaction tank 120 for a secondary reaction or directly output clear water.

[0059] The clear water tank 140 and the reaction tank 120 of this device are connected by pipelines to form a closed loop. Wastewater can be repeatedly passed through the modified ceramic membrane module 130 for catalytic oxidation degradation, which greatly prolongs the contact time between wastewater and oxidant and the modified ceramic membrane 133, making the catalytic oxidation degradation more complete, reducing catalyst loss, and improving the efficiency of peracetic acid oxidation degradation.

[0060] Furthermore, reaction tank 120 is a peracetic acid reaction tank 120.

[0061] like Figures 1-2 As shown, in one embodiment,

[0062] Box 131;

[0063] A partition 136 is disposed inside the box body 131, dividing the box body 131 into two spaces;

[0064] A ceramic membrane support 132 is disposed within the housing 131;

[0065] A plurality of ceramic membranes 137 are disposed on the ceramic membrane support 132, and the plurality of ceramic membranes 137 are disposed in the space on one side of the partition 136, and the plurality of ceramic membranes 137 are provided with pipes.

[0066] A plurality of modified ceramic membranes 133 are disposed on the ceramic membrane support 132. The plurality of modified ceramic membranes 133 are all located in a space away from the ceramic membrane 137. Wastewater passes through the ceramic membrane 137 and is transported to the modified ceramic membrane 133 through a pipeline.

[0067] Water inlet pipe 134 is disposed on the housing 131 and is connected to the outlet end of the first centrifugal pump 121.

[0068] The water outlet pipe 135 is installed on the box body 131. After passing through several modified ceramic membranes 133, the sewage is output through the water outlet pipe 135. The water outlet pipe 135 is connected to the clear water tank 140.

[0069] In this embodiment, the inlet pipe 134 is connected to the outlet end of the first centrifugal pump 121. The inlet end transports sewage into the box 131. The sewage enters the space with the ceramic membrane 137, passes through the ceramic membrane 137, and is then transported through the pipe to the space with the modified ceramic membrane 133 for filtration. After filtration, it flows into the right side area of ​​the partition 136 through the water collection pipe, and then passes through the catalytic oxidation of the modified ceramic membrane 133 before being transported to the clear water tank 140 through the inlet pipe 134.

[0070] like Figures 1-2 As shown, further,

[0071] Each of the modified ceramic membranes 133 has a number of small pores. The surface of the modified ceramic membranes 133 and the small pores are loaded with catalysts. After the wastewater passes through the small pores on the surface of the modified ceramic membranes 133, it is discharged to the outlet pipe 135.

[0072] It should be noted that the catalyst supported on the surface and pores of the modified ceramic membrane 133 is a Co-Fe-Mn bilayer metal hydroxide catalyst.

[0073] like Figure 1 As shown, in one embodiment, it further includes:

[0074] A stirring assembly 150 is disposed on the reaction tank 120, and the stirring end of the stirring assembly 150 is located inside the reaction tank 120.

[0075] In this embodiment, the stirring assembly 150 has a driving component and a stirring rod. The stirring rod is located inside the reaction tank 120, and the driving component is located at the top of the reaction tank 120. The driving component is preferably a motor. When the wastewater enters the reaction tank 120, a catalyst is added to the reaction tank 120, and the stirring assembly 150 is used to stir the catalyst and wastewater. After the catalyst and wastewater are fully stirred, the catalyst is extracted by the first centrifugal pump 121.

[0076] like Figure 1 As shown, in one embodiment, it further includes:

[0077] A reagent storage tank 111 is installed on the sedimentation tank 110 and is connected to the interior of the sedimentation tank 110 through a pipe.

[0078] In this embodiment, the reagent storage tank 111 is located on top of the sedimentation tank 110. The reagent storage tank 111 stores a precipitant. When sewage is added to the sedimentation tank 110, the precipitant is added to the sedimentation tank 110 through the reagent storage tank 111.

[0079] Specifically, the precipitant is polyaluminum chloride (PAC), purchased from Hubei Shiteng Chemical Technology Co., Ltd., grade 0231.

[0080] like Figure 1 As shown, in one embodiment, it further includes:

[0081] The second centrifugal pump 112 has its inlet end extending into the sedimentation tank 110 and its outlet end extending into the reaction tank 120.

[0082] A flared opening 113 is provided on the inlet end of the second centrifugal pump 112.

[0083] In this embodiment, the second centrifugal pump 112 pumps the wastewater after adding the precipitant to the sedimentation tank 110 into the reaction tank 120 through the funnel 113. During this process, the wastewater passes through the funnel 113 to block larger debris, and then the wastewater is transported from the sedimentation tank 110 into the reaction tank 120.

[0084] like Figure 1 As shown, in one embodiment, it further includes:

[0085] An oxidant storage tank 122 is disposed on the reaction tank 120 and is connected to the reaction tank 120 via a pipeline.

[0086] In this embodiment, after the wastewater enters the reaction tank 120 through the second centrifugal pump 112, the oxidant in the oxidant storage tank 122 is added to the reaction tank 120 for reaction, and the mixture is stirred by the stirring assembly 150.

[0087] Specifically, the oxidant is peracetic acid.

[0088] like Figure 1 As shown, in one embodiment, it further includes:

[0089] A reflux pump 141 is disposed between the clear water tank 140 and the reaction tank 120, and the clear water tank 140 and the reaction tank 120 are connected through the reflux pump 141.

[0090] A one-way valve 142 is disposed on the reflux pump 141.

[0091] In this embodiment, the clean water in the clear water tank 140 is transported to the reaction tank 120 by the return pump 141, and the sewage is prevented from flowing back to the clear water tank 140 by the setting of the one-way valve 142.

[0092] Furthermore, a one-way valve 142 is installed at the end where the reflux pump 141 is connected to the reaction tank 120.

[0093] like Figure 1 As shown, in one embodiment,

[0094] The reaction tank 120 has an outlet 143, and a pipe is provided on the outlet 143.

[0095] In this embodiment, the pipe on the outlet 143 is normally closed. After the circulation reaction is completed and the water quality meets the standards after random sampling, the water can be discharged through the outlet 143.

[0096] The functions of each module in each device of this utility model embodiment can be found in the corresponding description in the above method, and will not be repeated here.

[0097] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of those different embodiments or examples.

[0098] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0099] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various variations or substitutions within the technical scope disclosed in this application, and these should all be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A wastewater treatment device, characterized in that, include: Sedimentation tank; A reaction tank, which is connected to the sedimentation tank; A first centrifugal pump is installed on the reaction tank, and the inlet end of the first centrifugal pump extends into the reaction tank. A modified ceramic membrane module is disposed on the reaction tank and is connected to the outlet of the first centrifugal pump. A clear water tank is connected to the reaction tank via the first centrifugal pump and the modified ceramic membrane assembly, and the bottom of the clear water tank is connected to the reaction tank.

2. The wastewater treatment device according to claim 1, characterized in that, The modified ceramic membrane module includes: Box body; A partition is disposed inside the box, dividing the box into two spaces; A ceramic membrane support, wherein the ceramic membrane support is disposed within the housing; A plurality of ceramic membranes are disposed on the ceramic membrane support and disposed within one side space of the partition plate, and each of the ceramic membranes is provided with a pipe. A plurality of modified ceramic membranes are disposed on the ceramic membrane support, and the plurality of modified ceramic membranes are all located in a space away from the ceramic membrane. Wastewater passes through the ceramic membrane and is then transported to the modified ceramic membrane through a pipeline. A water inlet pipe is provided on the housing and is connected to the outlet of the first centrifugal pump. A water outlet pipe is installed on the box body. Wastewater passes through several modified ceramic membranes and is then output through the water outlet pipe, which is connected to the clear water tank.

3. The wastewater treatment device according to claim 2, characterized in that, Each of the modified ceramic membranes has a number of small pores. The surface of the modified ceramic membrane and the small pores are loaded with a catalyst. After the wastewater passes through the small pores on the surface of the modified ceramic membrane, it is discharged to the outlet pipe.

4. The wastewater treatment device according to claim 1, characterized in that, Also includes: A stirring assembly is disposed on the reaction tank, and the stirring end of the stirring assembly is located inside the reaction tank.

5. The wastewater treatment device according to claim 1, characterized in that, Also includes: A reagent storage tank is installed on the sedimentation tank and is connected to the interior of the sedimentation tank via a pipe.

6. The wastewater treatment device according to claim 1, characterized in that, Also includes: A second centrifugal pump, the inlet of which extends into the sedimentation tank, and the outlet of which extends into the reaction tank; The flared end is located on the inlet end of the second centrifugal pump.

7. The wastewater treatment device according to claim 1, characterized in that, Also includes: An oxidant storage tank is installed on the reaction tank and is connected to the reaction tank via a pipeline.

8. The wastewater treatment device according to claim 1, characterized in that, Also includes: A reflux pump is installed between the clear water tank and the reaction tank, and the clear water tank and the reaction tank are connected by the reflux pump.

9. A wastewater treatment device according to claim 8, characterized in that, Also includes: A one-way valve is provided in the reflux pump.

10. A wastewater treatment device according to claim 1, characterized in that, The reaction tank has a water outlet, and a pipe is installed on the water outlet.

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