Device for treating wastewater containing perfluorinated compounds

Abstract

The utility model relates to the technical field of wastewater treatment, in particular to a device for treating wastewater containing perfluorinated compounds, which comprises a filtering tank and a settling tank, a precipitation tank for chemical reaction precipitation of the wastewater is arranged below the filtering tank; wastewater is poured into the filtering tank, perfluorinated compounds in the wastewater are adsorbed and suspended solids and impurities in the wastewater are filtered out through the activated carbon adsorption plate and the filtering plate in the filtering tank, then the wastewater enters the depositing tank, and fluorine ions in the wastewater are removed through chemical deposition of the wastewater and a proper amount of chemical agents. According to the method, fluorine ions react with a medicament to generate insoluble precipitates, so that the concentration of the fluorine ions in wastewater is reduced, after the filtering structure is used for a period of time, the filtering structure is detached and cleaned, accumulated pollutants are removed through regular cleaning, the filtering effect is kept, the wastewater treatment efficiency is improved, meanwhile, the filtering performance is kept through regular cleaning, and the service life of the filtering structure is prolonged. The wastewater treatment effect and the wastewater treatment quality are ensured.

Description

Technical Field

[0001] This utility model relates to the field of wastewater treatment technology, and in particular to an apparatus for treating wastewater containing perfluorinated compounds. Background Technology

[0002] Wastewater containing perfluorinated compounds refers to wastewater containing perfluorinated organic compounds. Perfluorinated compounds have multi-organ toxicity, affecting heredity and reproduction. Studies have also shown that perfluorinated compounds can interfere with the human endocrine system and are suspected of being carcinogenic. This type of wastewater mainly comes from industries such as chemical engineering, non-ferrous metal smelting, coking, electroplating, and textile printing and dyeing. It may also be generated during metal welding and smelting, as well as ceramic and glass manufacturing processes. Wastewater containing perfluorinated compounds can be treated through steps such as filtration, sedimentation, and purification.

[0003] Most existing wastewater treatment devices use fixed filtration structures in a single direction. Since wastewater may contain a lot of suspended solids and impurities, these substances can easily accumulate in the filtration structure, causing it to become clogged. If the filtration structure is not easy to disassemble and clean, perfluorinated compounds and other pollutants in the wastewater may not be effectively removed, thereby reducing the treatment effect and further affecting the quality of wastewater treatment.

[0004] Therefore, since most of the existing wastewater treatment devices use fixed unidirectional filters, the filters may become clogged due to the presence of suspended solids and impurities in the wastewater. If the filters are not easy to disassemble and clean, the effectiveness and quality of wastewater treatment will be affected. In this case, a device for treating wastewater containing perfluorinated compounds can be designed with a detachable filter structure to improve the effectiveness and quality of wastewater treatment. Utility Model Content

[0005] To overcome the problem that most existing wastewater treatment devices use unidirectional fixed filtration structures, which can clog the filtration structure due to the large amount of suspended solids and impurities in the wastewater, and that the inconvenience of disassembling and cleaning the filtration structure can affect the effectiveness and quality of wastewater treatment.

[0006] The technical solution of this utility model is as follows: a device for treating wastewater containing perfluorinated compounds, including a filter tank and a sedimentation tank; a sedimentation tank for chemical reaction and precipitation of wastewater is provided below the filter tank; an activated carbon adsorption plate is provided inside the filter tank; multiple sets of arc-shaped snap-fit ​​plates are installed around the outside of the activated carbon adsorption plate; large-pore filter plates and small-pore filter plates are arranged in sequence below the activated carbon adsorption plate and are fixedly connected to the arc-shaped snap-fit ​​plates; arc-shaped snap-fit ​​grooves are opened on the inner wall of the filter tank corresponding to the arc-shaped snap-fit ​​plates.

[0007] Preferably, the wastewater is poured into a filter tank, where activated carbon adsorption plates and filter plates adsorb perfluorinated compounds and filter out suspended solids and impurities. The wastewater then enters a sedimentation tank where it undergoes chemical precipitation with appropriate chemical agents to remove fluoride ions. The fluoride ions react with the agents to form insoluble precipitates, thereby reducing the fluoride ion concentration in the wastewater. After the filter structure has been used for a period of time, it is disassembled and cleaned.

[0008] Preferably, a round cover is provided on the top of the filter tank, and two sets of handles are horizontally installed on the upper end of the round cover. An inlet pipe is provided between the two sets of handles and is fixedly connected to the round cover.

[0009] Preferably, a first telescopic valve is provided at the connection between the liquid inlet pipe and the round cover, a first electromagnetic control valve is installed on the outer side of the first telescopic valve, and an annular sealing ring is installed at the lower edge of the round cover.

[0010] Preferably, multiple sets of arc-shaped vertical plates that are fixedly connected to the sedimentation tank are installed around the lower edge of the filter tank, and a connecting pipe that is fixedly connected to the sedimentation tank is installed in the middle of the lower end of the filter tank.

[0011] Preferably, a feed pipe is provided on one side of the connecting pipe and fixedly connected to the sedimentation tank. A rotating column is installed in the middle of the inner side of the sedimentation tank, a motor is installed at the lower end of the rotating column, and multiple sets of stirring rods are linearly installed around the outside of the rotating column.

[0012] Preferably, a liquid outlet pipe is installed at the lower end of the sedimentation tank, and a second telescopic valve is provided at the connection between the liquid outlet pipe and the sedimentation tank. A second electromagnetic control valve is installed on the outer side of the second telescopic valve.

[0013] Preferably, an annular snap-fit ​​groove is provided at the lower edge of the liquid outlet pipe, and a filter disc is provided below the liquid outlet pipe. An annular snap-fit ​​plate is installed on the upper end of the filter disc, corresponding to the annular snap-fit ​​groove.

[0014] The beneficial effects of this invention are as follows: Wastewater is poured into a filter tank, where activated carbon adsorption plates and filter plates adsorb perfluorinated compounds and filter out suspended solids and impurities. The wastewater then enters a sedimentation tank where it undergoes chemical precipitation with appropriate chemical agents to remove fluoride ions. The fluoride ions react with the agents to form insoluble precipitates, thereby reducing the fluoride ion concentration in the wastewater. After a period of use, the filter structure is disassembled and cleaned regularly to remove accumulated contaminants, maintain filtration efficiency, and improve wastewater treatment efficiency. Regular cleaning also maintains filtration performance, ensuring both the effectiveness and quality of wastewater treatment. Attached Figure Description

[0015] Figure 1 The diagram shown is a schematic representation of the overall structure of the wastewater treatment device of this utility model.

[0016] Figure 2 The diagram shown is a schematic representation of the activated carbon adsorption plate structure of the wastewater treatment device of this utility model.

[0017] Figure 3 The diagram shown is a schematic representation of the connecting pipe structure of the wastewater treatment device of this utility model.

[0018] Figure 4 The diagram shown is a schematic representation of the stirring rod structure of the wastewater treatment device of this utility model.

[0019] Explanation of reference numerals in the attached drawings: 1. Filter tank; 2. Sedimentation tank; 101. Round cover; 102. Handle; 103. Liquid inlet pipe; 104. First telescopic valve; 105. First solenoid control valve; 106. Annular sealing ring; 107. Activated carbon adsorption plate; 108. Large pore filter plate; 109. Small pore filter plate; 110. Arc-shaped snap-fit ​​plate; 111. Arc-shaped snap-fit ​​groove; 112. Arc-shaped vertical plate; 113. Connecting pipe; 201. Feed pipe; 202. Rotating column; 203. Motor; 204. Stirring rod; 205. Liquid outlet pipe; 206. Annular snap-fit ​​groove; 207. Filter circular plate; 208. Annular snap-fit ​​plate; 209. Second telescopic valve; 210. Second solenoid control valve. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] Please see Figures 1-4 This utility model provides an embodiment of an apparatus for treating wastewater containing perfluorinated compounds, comprising a filter tank 1 and a sedimentation tank 2; a sedimentation tank 2 for chemical reaction and precipitation of wastewater is provided below the filter tank 1; an activated carbon adsorption plate 107 is provided inside the filter tank 1; multiple sets of arc-shaped snap-fit ​​plates 110 are installed around the outside of the activated carbon adsorption plate 107; a large-pore filter plate 108 and a small-pore filter plate 109 are sequentially provided below the activated carbon adsorption plate 107 and fixedly connected to the arc-shaped snap-fit ​​plates 110; an arc-shaped snap-fit ​​groove 111 is opened on the inner wall of the filter tank 1 corresponding to the arc-shaped snap-fit ​​plates 110.

[0022] Please see Figures 2-3In this embodiment, a round cover 101 is provided above the filter tank 1. Two sets of handles 102 are horizontally installed on the upper end of the round cover 101. A liquid inlet pipe 103 is fixedly connected to the round cover 101 between the two sets of handles 102. Lifting the handles 102 opens the round cover 101, allowing the activated carbon adsorption plate 107, the large pore filter plate 108, and the small pore filter plate 109 to be removed. A first telescopic valve 104 is provided at the connection between the liquid inlet pipe 103 and the round cover 101. A first electromagnetic control valve 105 is installed on one side of the first telescopic valve 104. The first electromagnetic control valve 105 (model AD-8A-N-G1) has an annular sealing ring 106 installed at the lower edge of the round cover 101. Under the control of the first electromagnetic control valve 105, the first telescopic valve 104 is gradually opened to control the flow rate of wastewater. Multiple sets of arc-shaped vertical plates 112 fixedly connected to the sedimentation tank 2 are installed around the lower edge of the filter tank 1. A connecting pipe 113 fixedly connected to the sedimentation tank 2 is installed in the middle of the lower end of the filter tank 1. The filtered wastewater enters the sedimentation tank 2 through the connecting pipe 113.

[0023] Please see Figure 4 In this embodiment, a feed pipe 201 fixedly connected to the sedimentation tank 2 is provided on one side of the connecting pipe 113. A rotating column 202 is installed in the middle of the inner side of the sedimentation tank 2, and a motor 203 is installed at the lower end of the rotating column 202. Multiple sets of stirring rods 204 are linearly arranged around the outside of the rotating column 202. An appropriate amount of chemical reagent is poured into the sedimentation tank 2 through the feed pipe 201. Then, driven by the motor 203, the rotating column 202 drives the stirring rods 204 to rotate, which facilitates the thorough mixing of wastewater and chemical reagent, so that fluoride ions react with the reagent to form an insoluble precipitate. A liquid outlet pipe 205 is installed at the lower end of the sedimentation tank 2. A second telescopic valve 209 is provided at the connection between the liquid outlet pipe 205 and the sedimentation tank 2. A second electromagnetic valve is installed on one side of the outer side of the second telescopic valve 209. Control valve 210, through the control of the second electromagnetic control valve 210, causes the second telescopic valve 209 to contract and open, facilitating the discharge of wastewater from the outlet pipe 205. An annular snap-fit ​​groove 206 is provided at the lower edge of the outlet pipe 205, and a filter disc 207 is provided below the outlet pipe 205. An annular snap-fit ​​plate 208 is installed at the upper end of the filter disc 207 corresponding to the annular snap-fit ​​groove 206. The filter disc 207 can filter and separate the sediment in the wastewater, thereby reducing the concentration of fluoride ions in the wastewater. After the device has been used for a period of time, the filter disc 207 is disassembled and these filter parts are cleaned. After cleaning, the annular snap-fit ​​plate 208 drives the filter disc 207 to be positioned and snapped into the outlet pipe 205 along the annular snap-fit ​​groove 206.

[0024] During operation, the wastewater pipeline is first connected to the inlet pipe 103 to facilitate the wastewater entering the filter tank 1 through the inlet pipe 103. At the same time, the first telescopic valve 104 is gradually opened under the control of the first electromagnetic control valve 105 to control the flow rate of the wastewater. Then, the activated carbon adsorption plate 107 adsorbs the perfluorinated compounds in the wastewater. Then, it undergoes preliminary filtration through the large pore filter plate 108 to remove larger suspended solids and impurities in the wastewater. Finally, it undergoes further filtration through the small pore filter plate 109 to remove smaller suspended solids and impurities in the wastewater. The filtered wastewater enters the sedimentation tank 2 through the connecting pipe 113.

[0025] An appropriate amount of chemical reagent is poured into the sedimentation tank 2 through the feed pipe 201. Then, driven by the motor 203, the rotating column 202 drives the stirring rod 204 to rotate, which facilitates the thorough mixing of wastewater and chemical reagent, so that fluoride ions react with the reagent to form insoluble precipitates. Then, under the control of the second electromagnetic control valve 210, the second telescopic valve 209 is opened and closed, which facilitates the discharge of wastewater from the outlet pipe 205. At the same time, the filter disc 207 can filter and separate the precipitates in the wastewater, thereby reducing the concentration of fluoride ions in the wastewater.

[0026] After the device has been used for a period of time, lift the handle 102, open the round cover 101, and take out the activated carbon adsorption plate 107, the large pore filter plate 108, and the small pore filter plate 109. Then, disassemble the filter round plate 207 and clean these filter parts to prevent suspended solids, impurities, and sediments from clogging the filter parts. After cleaning, the arc-shaped snap-fit ​​plate 110 drives the activated carbon adsorption plate 107, the large pore filter plate 108, and the small pore filter plate 109 to be positioned and connected to the filter tank 1 along the arc-shaped snap-fit ​​groove 111. Then, lift the handle 102, and the annular sealing ring 106 drives the round cover 101 to fit and connect to it along the inner wall of the filter tank 1. Then, the annular snap-fit ​​plate 208 drives the filter round plate 207 to be positioned and snapped to the liquid outlet pipe 205 along the annular snap-fit ​​groove 206, and it can be used again.

[0027] Through the above steps, wastewater is poured into filter tank 1. The activated carbon adsorption plate 107 and filter plate in filter tank 1 adsorb perfluorinated compounds in the wastewater and filter out suspended solids and impurities. Then, the wastewater enters sedimentation tank 2, where it undergoes chemical precipitation with an appropriate amount of chemical agents to remove fluoride ions from the wastewater. The fluoride ions react with the agents to form insoluble precipitates, thereby reducing the concentration of fluoride ions in the wastewater. After the filter structure has been used for a period of time, it is disassembled and cleaned. Regular cleaning removes accumulated pollutants, maintains the filtration effect, and improves the efficiency of wastewater treatment. At the same time, regular cleaning maintains the filtration performance, ensuring the wastewater treatment effect and quality. This addresses the problem that most existing wastewater treatment devices use unidirectional fixed filter structures, which may clog the filter structure due to the large amount of suspended solids and impurities in the wastewater. If the filter structure is inconvenient to disassemble and clean, it will affect the effect and quality of wastewater treatment.

Claims

1. An apparatus for treating wastewater containing perfluorinated compounds, comprising a filter tank (1); characterized in that: It also includes a sedimentation tank (2); a sedimentation tank (2) for chemical reaction sedimentation of wastewater is provided below the filter tank (1), an activated carbon adsorption plate (107) is provided inside the filter tank (1), multiple sets of arc-shaped snap-fit ​​plates (110) are installed around the outside of the activated carbon adsorption plate (107), a large-pore filter plate (108) and a small-pore filter plate (109) are provided below the activated carbon adsorption plate (107) and fixedly connected to the arc-shaped snap-fit ​​plates (110), an arc-shaped snap-fit ​​groove (111) is opened on the inner wall of the filter tank (1) corresponding to the arc-shaped snap-fit ​​plates (110), a round cover (101) is provided on the top of the filter tank (1), and the upper end of the round cover (101) is... Two sets of handles (102) are installed horizontally. An inlet pipe (103) is fixedly connected to the round cover (101) between the two sets of handles (102). A first telescopic valve (104) is provided at the connection between the inlet pipe (103) and the round cover (101). A first electromagnetic control valve (105) is installed on the outside side of the first telescopic valve (104). An annular sealing ring (106) is installed at the lower edge of the round cover (101). Multiple sets of arc-shaped vertical plates (112) fixedly connected to the sedimentation tank (2) are installed around the lower edge of the filter tank (1). A connecting pipe (113) fixedly connected to the sedimentation tank (2) is installed in the middle of the lower end of the filter tank (1).

2. The apparatus for treating wastewater containing perfluorinated compounds according to claim 1, characterized in that: A feed pipe (201) is fixedly connected to the sedimentation tank (2) on one side of the connecting pipe (113). A rotating column (202) is installed in the middle of the inner side of the sedimentation tank (2). A motor (203) is installed at the lower end of the rotating column (202). Multiple sets of stirring rods (204) are linearly installed around the outside of the rotating column (202).

3. The apparatus for treating wastewater containing perfluorinated compounds according to claim 2, characterized in that: A liquid outlet pipe (205) is installed at the lower end of the sedimentation tank (2). A second telescopic valve (209) is provided at the connection between the liquid outlet pipe (205) and the sedimentation tank (2). A second electromagnetic control valve (210) is installed on the outside side of the second telescopic valve (209).

4. The apparatus for treating wastewater containing perfluorinated compounds according to claim 3, characterized in that: An annular snap-fit ​​groove (206) is provided at the lower edge of the liquid outlet pipe (205), and a filter disc (207) is provided below the liquid outlet pipe (205). An annular snap-fit ​​plate (208) is installed on the upper end of the filter disc (207) corresponding to the annular snap-fit ​​groove (206).

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