Integrated electrocoagulation vertical flow sedimentation device for recirculating aquaculture

Abstract

The utility model relates to an integrated electric flocculation vertical flow precipitation device for circulating water culture, comprising a barrel body, the barrel body is of a cylindrical side wall and a conical bottom structure, a sewage pipe is arranged at the bottom, a water inlet pipe is arranged at the lower part of the side wall, and a water outlet pipe is arranged at the upper part, a central vertical pipe is coaxially arranged in the barrel body, a conical reflecting plate is arranged below the central vertical pipe, an electric flocculation assembly is located in the middle part of the barrel body, comprising a concentrically and alternately arranged annular pipe type titanium-based electrode group and a direct current power supply, the electrode group is fixed to the inner wall of the barrel body through a fixing support, an air flotation assembly is located at the upper part of the barrel body, and is composed of a supporting plate, a partition plate and an overflow cylinder with a drain, for separating floating sludge and clean water, a turbidity sensor is arranged above the electric flocculation assembly and is linked with a control cabinet and a water inlet valve, and the water inlet flow is dynamically adjusted to stabilize the height of the suspended layer. The device is integrated with vertical flow precipitation, electric flocculation and air flotation, combined with a direct current power supply to prevent electrode passivation and an automatic control system, and significantly improves the removal efficiency of suspended matter and the stability of water quality.

Description

Technical Field

[0001] This utility model relates to the field of water treatment technology for recirculating aquaculture systems, and in particular to an integrated electrocoagulation vertical flow sedimentation device for recirculating aquaculture systems, which combines vertical flow sedimentation and electrocoagulation functions and is suitable for water purification in high-density recirculating aquaculture systems. Background Technology

[0002] In recirculating aquaculture systems, the efficiency of wastewater treatment directly impacts water quality stability and aquaculture profitability. Traditional sedimentation devices suffer from low separation efficiency and large footprint. Existing electrocoagulation equipment often experiences efficiency reduction due to electrode passivation, and insufficient integration of vertical flow sedimentation and air flotation processes leads to incomplete impurity removal, affecting subsequent treatment results. Therefore, there is an urgent need for an integrated, high-efficiency water treatment device. Utility Model Content

[0003] To address the shortcomings of existing technologies, this invention provides an integrated electrocoagulation vertical flow sedimentation device. Through the integrated design of vertical flow sedimentation and electrocoagulation, it achieves efficient water treatment, reduces energy consumption and maintenance costs, and is suitable for water purification in recirculating aquaculture systems.

[0004] To achieve the above objectives, this utility model adopts the following technical solution: an integrated electrocoagulation vertical flow sedimentation device for recirculating aquaculture includes a tank body. The tank body has a cylindrical sidewall and a conical bottom structure. Support legs are provided at the lower part of the tank body. A water inlet pipe with an inlet valve is provided at the lower part of the sidewall of the tank body. A water outlet pipe is provided at the upper part of the sidewall of the tank body. A drain pipe with a drain valve is provided at the center of the bottom of the tank body. The central vertical pipe has a cylindrical upper part and a frustum-shaped lower part structure. The central vertical pipe is concentrically arranged with the sidewall of the tank body. The outer wall of the central vertical pipe is connected by... The connecting rod is connected to the upper part of the overflow cylinder of the air flotation component. The water inlet pipe passes through the side wall of the tank and enters the interior of the central vertical pipe vertically. The electrocoagulation component is located in the middle of the tank, and the air flotation component is located in the upper part of the tank. The reflector is a conical structure and is located directly below the central vertical pipe. It is fixedly connected to the bottom of the tank by a support rod. A flange is provided on the tank between the electrocoagulation component and the air flotation component to facilitate disassembly and assembly of the tank. The turbidity sensor is located in the upper part of the electrocoagulation component. The control cabinet is connected to the turbidity sensor and the water inlet valve. Water enters the central vertical pipe from bottom to top through the inlet pipe, flows from top to bottom within the central vertical pipe, and after being reflected by the conical reflector, flows from bottom to top between the inner wall of the tank and the outer wall of the central vertical pipe. This process performs vertical sedimentation, removing small particulate waste and some suspended solids from the water. Simultaneously, as the water flows through the electrocoagulation component, the pulsed DC power supply drives the titanium-based electrodes to electrolyze and generate metal ions, which form flocs with pollutants. The tiny bubbles generated by electrocoagulation carry suspended solids to the surface, further removing suspended solids from the water. A turbidity sensor monitors the height of the suspended layer in real time, and the control cabinet automatically adjusts the opening of the inlet valve. When the suspended layer height is too high, the control cabinet reduces the opening of the inlet valve; when the suspended layer height is too low, the control cabinet increases the opening of the inlet valve, dynamically controlling the suspended layer to remain stable within a suitable height range.

[0005] Furthermore, the electrocoagulation assembly includes electrode group one, electrode group two, DC power supply and fixing bracket. Electrode group one and electrode group two are annular tubular structures, and are arranged concentrically and alternately. Electrode group one and electrode group two are located between the inner side wall of the barrel and the outer side wall of the central vertical tube. Electrode group one and electrode group two are concentrically arranged with the side wall of the barrel and fixed to the side wall of the barrel by the fixing bracket. The DC power supply is connected to electrode group one and electrode group two respectively.

[0006] Furthermore, the flotation assembly includes a support plate, an overflow cylinder, a partition plate, a drain outlet, and a scum discharge pipe. The support plate has a frustum-shaped structure, and its outer side is connected to the side wall of the tank. The overflow cylinder has a frustum-shaped upper part and a cylindrical lower part, and is concentrically arranged with the side wall of the tank. The lower part of the overflow cylinder is connected to the inner side of the support plate. The partition plate has a frustum-shaped structure and is located directly above the support plate. Its outer side is connected to the side wall of the tank, and its inner side is connected to the cylinder wall of the overflow cylinder. Drain outlets are evenly distributed on the cylinder wall of the overflow cylinder, and the drain outlets are located between the support plate and the partition plate. The scum discharge pipe is located on the side wall of the tank, and its lower edge is flush with the upper surface of the partition plate. The water outlet pipe is located on the side wall of the tank, and its lower edge is flush with the upper surface of the support plate. The scum overflows the upper edge of the overflow cylinder and is discharged through the scum discharge pipe; the treated clean water flows out through the drain outlet on the overflow cylinder wall and is then discharged outside the device through the water outlet pipe.

[0007] Furthermore, the electrode group one and electrode group two of the electrocoagulation component are titanium-based coated electrodes. Titanium-based coated electrodes are corrosion-resistant and have a long service life.

[0008] Furthermore, the DC power supply of the electrocoagulation component adopts a pulsed DC power supply with a periodic commutation mode. The periodic commutation mode of the DC power supply can reduce electrode losses under single polarity and prevent electrode scaling; the pulsed DC power supply can enhance bubble generation, improve flotation efficiency, and improve floc aggregation efficiency.

[0009] The beneficial effects of this utility model are as follows: the integrated design of vertical flow sedimentation and electrocoagulation reduces the floor space; the electrocoagulation component, combined with a pulsed DC power supply, enhances the flocculation and sedimentation of pollutants, and works with vertical flow sedimentation to strengthen the interception and sedimentation of suspended solids; the turbidity sensor monitors the height of the suspended layer in real time, and the control cabinet automatically adjusts the opening of the inlet valve to dynamically control the suspended layer to remain stable within a suitable height range, preventing floc loss and ensuring stable effluent quality; the tank can be separated by a flange, and the electrode assembly can be disassembled and replaced, making maintenance convenient. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of this utility model.

[0011] Figure 2 This is the structure of the electrocoagulation component of this utility model.

[0012] The following are the labels in the diagram: 1. Tank body, 2. Inlet pipe, 3. Outlet pipe, 4. Sewage pipe, 5. Central vertical pipe, 6. Electrocoagulation assembly, 61. Electrode group one, 62. Electrode group two, 63. DC power supply, 64. Fixed bracket, 7. Air flotation assembly, 71. Support plate, 72. Overflow cylinder, 73. Partition plate, 74. Drain outlet, 75. Scum discharge pipe, 8. Connecting rod, 9. Turbidity sensor, 10. Control cabinet, 11. Inlet valve, 12. Sewage valve, 13. Reflector plate, 14. Flange, 15. Support leg, 16. Support rod. Detailed Implementation

[0013] like Figures 1-2 As shown, an integrated electrocoagulation vertical flow sedimentation device for recirculating aquaculture includes a tank body 1, which has a cylindrical sidewall and a conical bottom structure. Support legs 15 are provided at the lower part of the tank body 1. An inlet pipe 2 is provided at the lower part of the sidewall of the tank body 1, and an inlet valve 11 is installed on the inlet pipe 2. An outlet pipe 3 is provided at the upper part of the sidewall of the tank body 1. A drain pipe 4 is located at the center of the bottom of the tank body 1, and a drain valve 12 is installed on the drain pipe 4. A central vertical pipe 5 has a cylindrical upper part and a frustum-shaped lower part structure, and is concentrically arranged with the sidewall of the tank body 1. The outer sidewall of the central vertical pipe 5 is connected to the overflow cylinder 7 of the air flotation assembly 7 via a connecting rod 8. The upper part of the tank 1 is connected to the water inlet pipe 2, which passes through the side wall of the tank 1 and enters the interior of the central vertical pipe 5 vertically. The electrocoagulation component 6 is located in the middle of the tank 1, and the air flotation component 7 is located in the upper part of the tank 1. The reflector plate 13 has a conical structure and is located directly below the central vertical pipe 5. It is fixedly connected to the bottom of the tank 1 by a support rod 16. A flange 14 is provided on the tank 1 between the electrocoagulation component 6 and the air flotation component 7 to facilitate the disassembly and assembly of the tank 1. The turbidity sensor 9 is located in the upper part of the electrocoagulation component 6. The control cabinet 10 is connected to the turbidity sensor 9 and the water inlet valve 11.

[0014] The electrocoagulation assembly 6 includes an electrode group 61, an electrode group 62, a DC power supply 63, and a fixing bracket 64. The electrode group 61 and the electrode group 62 are annular tubular structures, and are arranged concentrically and alternately. The electrode group 61 and the electrode group 62 are located between the inner side wall of the barrel 1 and the outer side wall of the central vertical pipe 5. The electrode group 61 and the electrode group 62 are concentrically arranged with the side wall of the barrel 1 and fixed to the side wall of the barrel 1 by the fixing bracket 64. The DC power supply 63 is connected to the electrode group 61 and the electrode group 62 respectively.

[0015] The air flotation assembly 7 includes a support plate 71, an overflow cylinder 72, a partition plate 73, a drain outlet 74, and a scum discharge pipe 75. The support plate 71 has a frustum-shaped structure, and its outer side is connected to the side wall of the tank body 1. The overflow cylinder 72 has a frustum-shaped upper part and a cylindrical lower part, and is concentrically arranged with the side wall of the tank body 1. The lower part of the overflow cylinder 72 is connected to the inner side of the support plate 71. The partition plate 73 has a frustum-shaped structure and is disposed on the support plate 71. Directly above, the outer side of the partition plate 73 is connected to the side wall of the barrel 1, and the inner side is connected to the wall of the overflow cylinder 72. Drainage outlets 74 are evenly distributed on the wall of the overflow cylinder 72. The drainage outlets 74 are located between the support plate 71 and the partition plate 73. The scum discharge pipe 75 is set on the side wall of the barrel 1. The lower edge of the scum discharge pipe 75 is flush with the upper surface of the partition plate 73. The water outlet pipe 3 is set on the side wall of the barrel 1. The lower edge of the water outlet pipe 3 is flush with the upper surface of the support plate 71.

[0016] The electrode group 61 and electrode group 62 of the electrocoagulation component 6 are titanium-based coated electrodes.

[0017] The DC power supply 63 of the electrocoagulation component 6 adopts a pulsed DC power supply with a periodic commutation mode.

[0018] The working process of this utility model is as follows: (1) The control cabinet 10 controls the inlet valve 11 to open, and the aquaculture sewage enters the central vertical pipe 5 through the inlet pipe 2. (2) The turbidity sensor 9 monitors the height position of the suspended layer in real time, and automatically adjusts the opening of the inlet valve 11 in conjunction with the control cabinet 10 to dynamically control the suspended layer to be stable within a suitable height range. (3) The water entering the central vertical pipe 5 flows from top to bottom, and after being reflected by the reflector plate 13, it flows upward between the inner side wall of the barrel 1 and the outer side wall of the central vertical pipe 5. This process performs vertical sedimentation on the water, removing small particulate waste and some suspended solids from the water. (4) When the water flows through the electrocoagulation component 6, the pulsed DC power supply drives the titanium-based electrode to electrolyze and generate metal ions, which form flocs with pollutants. The tiny bubbles generated by electrocoagulation carry the suspended solids to the surface. (5) The foam overflows the upper edge of the overflow cylinder 72 and is discharged through the scum discharge pipe 75; the treated clean water flows out through the drain outlet 74 on the wall of the overflow cylinder 72 and is discharged outside the device through the outlet pipe 3. (6) Regularly open the drain valve 12, and the fish feces and other waste deposited at the bottom of the barrel 1 will be discharged through the drain pipe 4.

[0019] The above description is only a specific embodiment of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

Claims

1. An integrated electrocoagulation vertical flow sedimentation device for recirculating aquaculture, comprising a tank (1), characterized in that: The barrel (1) has a cylindrical sidewall and a conical bottom structure. A support leg (15) is provided at the lower part of the barrel (1). A water inlet pipe (2) is provided at the lower part of the sidewall of the barrel (1). A water inlet valve (11) is provided on the water inlet pipe (2). A water outlet pipe (3) is provided at the upper part of the sidewall of the barrel (1). A sewage pipe (4) is provided at the center of the bottom of the barrel (1). A sewage valve (12) is provided on the sewage pipe (4). A central vertical pipe (5) is coaxially arranged inside the barrel (1). The central vertical pipe (5) has a cylindrical upper part and a frustum-shaped lower part structure. The outer sidewall of the central vertical pipe (5) is connected to the upper part of the overflow cylinder (72) of the air flotation component (7) through a connecting rod (8). The water inlet pipe (2) passes through the sidewall of the barrel (1). The device enters the interior of the central vertical pipe (5) vertically upwards. An electrocoagulation component (6) is provided in the middle of the barrel (1). An air flotation component (7) is provided in the upper part of the barrel (1). A cone-shaped reflector plate (13) is provided directly below the central vertical pipe (5). The reflector plate (13) is fixedly connected to the bottom of the barrel (1) by a support rod (16). A flange (14) is provided on the barrel (1) between the electrocoagulation component (6) and the air flotation component (7) to facilitate the disassembly and assembly of the barrel (1). A turbidity sensor (9) is provided at the upper part of the electrocoagulation component (6). The device also includes a control cabinet (10). The control cabinet (10) is connected to the turbidity sensor (9) and the inlet valve (11).

2. The integrated electrocoagulation vertical flow sedimentation device for recirculating aquaculture as described in claim 1, characterized in that: The electrocoagulation assembly (6) includes electrode group one (61), electrode group two (62), DC power supply (63) and fixed bracket (64). Electrode group one (61) and electrode group two (62) are annular tube structures, and electrode group one (61) and electrode group two (62) are arranged concentrically and alternately. Electrode group one (61) and electrode group two (62) are located between the inner side wall of the barrel (1) and the outer side wall of the central vertical tube (5). Electrode group one (61) and electrode group two (62) are concentrically arranged with the side wall of the barrel (1) and fixed to the side wall of the barrel (1) by the fixed bracket (64). The DC power supply (63) is connected to electrode group one (61) and electrode group two (62) respectively.

3. The integrated electrocoagulation vertical flow sedimentation device for recirculating aquaculture as described in claim 1, characterized in that: The air flotation assembly (7) includes a support plate (71), an overflow cylinder (72), a partition plate (73), a drain outlet (74), and a scum discharge pipe (75). The support plate (71) has a frustum-shaped structure, and the outer side of the support plate (71) is connected to the side wall of the tank body (1). The overflow cylinder (72) has a frustum-shaped upper part and a cylindrical lower part. The overflow cylinder (72) is concentrically arranged with the side wall of the tank body (1), and the lower part of the overflow cylinder (72) is connected to the inner side of the support plate (71). The partition plate (73) has a frustum-shaped structure and is disposed on the support plate (71). The outer side of the partition plate (73) is connected to the side wall of the barrel (1), and the inner side is connected to the wall of the overflow cylinder (72). Drainage outlets (74) are evenly distributed on the wall of the overflow cylinder (72). The drainage outlets (74) are located between the support plate (71) and the partition plate (73). The scum discharge pipe (75) is set on the side wall of the barrel (1). The lower edge of the scum discharge pipe (75) is flush with the upper surface of the partition plate (73). The water outlet pipe (3) is set on the side wall of the barrel (1). The lower edge of the water outlet pipe (3) is flush with the upper surface of the support plate (71).

4. An integrated electrocoagulation vertical flow sedimentation device for recirculating aquaculture as described in claim 2, characterized in that: The electrode group one (61) and electrode group two (62) of the electrocoagulation component (6) are titanium-based coated electrodes.

5. An integrated electrocoagulation vertical flow sedimentation device for recirculating aquaculture as described in claim 2, characterized in that: The DC power supply (63) of the electrocoagulation component (6) adopts a pulsed DC power supply with a periodic commutation mode.

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