Equipment for efficiently removing harmful pollutants in wastewater by using electric flocculation method

Abstract

The utility model discloses efficient wastewater harmful pollutant removal equipment by an electric flocculation method, which comprises a water tank main body, a plurality of electrode plate support frames and at least one water outlet groove are arranged in an inner cavity of the water tank main body, the bottom of the water outlet groove is arranged on the electrode plate support frames, and a plurality of electrolytic cells are arranged in the inner cavity of the water tank main body. The electrolytic cells are symmetrically arranged on the two sides of at least one water outlet groove, the water outlet grooves are used for separating every two adjacent electrolytic cells, a plurality of electrode plates are arranged in the electrolytic cells, an inner cavity of the water tank body is provided with a U-shaped water inlet groove communicated with the electrolytic cells, and one end of the U-shaped water inlet groove is communicated with a water inlet pipe. According to the utility model, the structure of the water tank main body is improved, so that the inner cavity of the water tank main body is of a multi-groove type, and the interval between the electrode plates is 5-36mm, so that the energy consumption is relatively low when the wastewater with high suspended matters, high organic matters, high antimony and high phosphorus is treated, the removal rate of various pollutants is improved, and the iron dissolution efficiency is also improved.

Description

Technical Field

[0001] The utility model relates to the technical field of wastewater treatment, in particular to a device for efficiently removing harmful pollutants from wastewater using an electric flocculation method. Background Art

[0002] Electroflocculation, also known as electrocoagulation or electro-coagulation, is a water treatment technology that uses electrochemical principles to produce electrochemical reactions in water through applied voltage to achieve the purpose of purifying water quality.

[0003] The existing electro-flocculation process is mainly used in the treatment of oily wastewater. The high-efficiency flocculating groups generated by electrolysis can effectively destroy the double-layer structure of oil droplets, achieve the effect of demulsification, and then the large number of microbubbles generated by the synergistic reaction complete the flotation removal of the oil droplets after demulsification, with a removal rate of more than 90%. However, it is rarely used for wastewater with high turbidity, high suspended matter and high metallic antimony. The main disadvantages of the process are high energy consumption, low removal rate of various pollutants, inability to improve iron dissolution efficiency, large equipment footprint, difficulty in slag discharge, large maintenance workload and high cost. Utility Model Content

[0004] The purpose of the utility model is to provide an efficient device for removing harmful pollutants from wastewater by an electric flocculation method, so as to solve the problems raised in the above background technology.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0006] A highly efficient device for removing harmful pollutants from wastewater using an electric flocculation method comprises a water tank body, the inner cavity of the water tank body being provided with a plurality of electrode plate support frames and at least one water outlet trough, the bottom of the water outlet trough being provided on the electrode plate support frame, and the inner cavity of the water tank body being provided with a plurality of electrolytic cells, the plurality of electrolytic cells being symmetrically arranged on both sides of at least one water outlet trough, and the water outlet trough being used to separate every two adjacent electrolytic cells, a plurality of electrode plates being provided in the electrolytic cells, and the inner cavity of the water tank body being provided with a U-shaped water inlet trough communicating with the electrolytic cells, one end of the U-shaped water inlet trough being communicated with a water inlet pipe, the other end of the U-shaped water inlet trough being provided with a slag discharge inspection hole, a sealing body being provided on one side of the slag discharge inspection hole, and one end of the plurality of water outlet troughs being respectively connected with a water outlet pipe.

[0007] Preferably, multiple groups of electrode plate positioning clamps are respectively provided on the top of the multiple electrode plate support frames, and each group of the electrode plate positioning clamps includes two oppositely arranged electrode plate positioning clamps, and multiple electrode plate positioning clamps are respectively provided with positioning slots.

[0008] Preferably, the bottom of the electrode plate is attached to the electrode plate support frame, and the top of the electrode plate is arranged in the positioning slot.

[0009] Preferably, the interval between every two adjacent positioning slots on the electrode positioning card plate is 5-36 mm.

[0010] Preferably, a plurality of support tubes are provided on the inner wall of the water outlet trough, and both ends of the support tubes are respectively connected to the inner wall of the water outlet trough.

[0011] Preferably, a supporting steel frame matching the bottom end of the water tank body is provided on the outside of the water tank body.

[0012] Preferably, the outer wall of the water tank body is provided with reinforcing ribs.

[0013] Preferably, the electrode plate is a low carbon steel plate or a pure iron plate.

[0014] Due to the adoption of the above technical solution, the present invention has achieved the following technical advancements compared to the prior art:

[0015] 1. The present invention provides a highly efficient device for removing harmful pollutants from wastewater using an electrocoagulation method. This device aims to address the current problems of high energy consumption, low removal rates, and inability to improve iron dissolution efficiency in treating wastewater with high turbidity, high suspended solids, and high metallic antimony content. By improving the structure of the water tank body, the inner cavity of the water tank body is made into a four-slot type, and the spacing between the electrode plates is 5-36mm. This device achieves relatively low energy consumption when treating wastewater with high suspended solids, high organic matter content, and high antimony and phosphorus content, while improving the removal rates of various pollutants and the iron dissolution efficiency.

[0016] 2. The utility model provides an efficient device for removing harmful pollutants from wastewater using the electrocoagulation method, in order to solve the shortcomings of existing equipment such as large floor space, difficulty in slag discharge, large maintenance workload and high cost. By optimizing the spatial combination of the inner cavity of the water tank body, the U-shaped water inlet trough can evenly distribute water to the electrolytic cell, and the electrolytic cell can react with high current density and flow rate, effectively saving the volume and floor space of the equipment and improving the efficiency per unit area. The electrode plates in the electrolytic cell can be easily removed, and the residue and dirt at the bottom of the U-shaped water inlet trough can be easily cleaned through the slag discharge inspection hole, making maintenance easy. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall structure of the first embodiment of the present invention;

[0018] Figure 2 This is a schematic diagram of the overall right-side stereoscopic structure of the first embodiment of the present utility model;

[0019] Figure 3 This is a schematic diagram of the front cross-sectional structure of the first embodiment of the present utility model;

[0020] Figure 4This is a schematic diagram of the right side cross-sectional structure of the first embodiment of the present utility model;

[0021] Figure 5 This is a schematic diagram of the overall structure of the second embodiment of the present utility model;

[0022] Figure 6 This is a schematic diagram of the overall left-side stereoscopic structure of the second embodiment of the present invention;

[0023] Figure 7 This is a schematic diagram of the left side cross-sectional structure of the second embodiment of the present invention.

[0024] In the figure: 1. Water tank body; 2. Electrode plate support frame; 3. Water outlet trough; 4. Electrolytic cell; 5. Electrode plate; 6. U-shaped water inlet trough; 7. Water inlet pipe; 8. Slag discharge inspection hole; 9. Water outlet pipe; 10. Electrode plate positioning clamp; 11. Support pipe; 12. Support steel frame; 13. Reinforcement ribs. DETAILED DESCRIPTION

[0025] The present invention is further described in detail below with reference to the embodiments:

[0026] like Figure 1-7 As shown, the utility model provides an efficient removal device for harmful pollutants in wastewater by an electric flocculation method, comprising a water tank body 1, the inner cavity of the water tank body 1 is provided with a plurality of electrode plate support frames 2 and at least one water outlet trough 3, the bottom of the water outlet trough 3 is provided on the electrode plate support frame 2, and the inner cavity of the water tank body 1 is provided with a plurality of electrolytic cells 4, the plurality of electrolytic cells 4 are symmetrically arranged on both sides of at least one water outlet trough 3, and the water outlet trough 3 is used to separate every two adjacent electrolytic cells 4, a plurality of electrode plates 5 are provided in the electrolytic cell 4, and the inner cavity of the water tank body 1 is provided with a U-shaped water inlet trough 6 communicating with the electrolytic cell 4, one end of the U-shaped water inlet trough 6 is communicated with a water inlet pipe 7, and the other end of the U-shaped water inlet trough 6 is provided with a slag discharge inspection hole 8, a sealing body is provided on one side of the slag discharge inspection hole 8, and one end of the plurality of water outlet troughs 3 are respectively connected with a water outlet pipe 9.

[0027] Specifically, the water outlet trough 3 is mainly formed by a bottom plate and two side plates connected to the bottom plate, and the bottom plate is located on the electrode plate support frame 2 to support and stabilize the water outlet trough 3, and the electrode plate support frame 2 is composed of a horizontal frame and a vertical plate, and the electrode plate positioning card 10 is located at the top of the vertical plate in the electrode plate support frame 2.

[0028] Furthermore, multiple groups of electrode plate positioning card plates 10 are respectively provided on the top of multiple electrode plate support frames 2, and each group of electrode plate positioning card plates 10 includes two oppositely arranged electrode plate positioning card plates 10, and multiple electrode plate positioning card plates 10 are respectively provided with positioning card slots, the bottom of the electrode plate 5 is attached to the electrode plate support frame 2, and the top end of the electrode plate 5 is set in the positioning card slot.

[0029] Specifically, the two electrode plate positioning cards 10 in each group of electrode plate positioning cards 10 are respectively located at the top of the water outlet trough 3, and the electrode plate positioning cards 10 are grouped into two, and each group of electrode plate positioning cards 10 is respectively located at the top of the corresponding electrolytic cell 4, thereby achieving support and fixation of the electrode plate 5.

[0030] Furthermore, the interval between every two adjacent positioning slots on the electrode positioning card plate 10 is 5-36 mm. The positioning slot interval is set so that the interval between every two adjacent electrode plates 5 is 5-36 mm, which enables several electrode plates 5 to react with higher current density and flow rate in the electrolytic cell 4.

[0031] Furthermore, a plurality of support tubes 11 are provided on the inner wall of the water outlet trough 3 , and both ends of the support tubes 11 are respectively connected to the inner wall of the water outlet trough 3 .

[0032] Specifically, the two ends of the plurality of support tubes 11 are respectively connected to the two side plates in the water outlet trough 3, so that the water outlet trough 3 can be stabilized and easy to use.

[0033] Furthermore, a supporting steel frame 12 matching the bottom end of the water tank body 1 is provided on the outside of the water tank body 1, and a reinforcing rib 13 is provided on the outer wall of the water tank body 1. Through the design of the supporting steel frame 12, the stability of the water tank body 1 can be ensured, and the design of the reinforcing rib 13 can further ensure the overall stability of the water tank body 1.

[0034] Furthermore, the electrode plate 5 is a low-carbon steel plate or a pure iron plate with a size of 400*600*5 mm. The electrode plate 5 can be easily taken out from the electrode plate positioning clamp 10.

[0035] Example 1

[0036] Combine Figures 1-4 As shown, it includes a water tank body 1, the inner cavity of the water tank body 1 is provided with multiple electrode plate support frames 2 and a water outlet trough 3, the bottom of the water outlet trough 3 is provided on the electrode plate support frame 2, and the inner cavity of the water tank body 1 is provided with two electrolytic cells 4, the two electrolytic cells 4 are symmetrically arranged on both sides of a water outlet trough 3, and the water outlet trough 3 is used to separate two adjacent electrolytic cells 4, a number of electrode plates 5 are arranged in the electrolytic cell 4, and the inner cavity of the water tank body 1 is provided with a U-shaped water inlet trough 6 communicating with the electrolytic cell 4, one end of the U-shaped water inlet trough 6 is communicated with a water inlet pipe 7, and the other end of the U-shaped water inlet trough 6 is provided with a slag inspection hole 8, a sealing body is provided on one side of the slag inspection hole 8, and one end of a water outlet trough 3 is respectively connected with a water outlet pipe 9.

[0037] Furthermore, multiple groups of electrode plate positioning card plates 10 are respectively provided on the top of multiple electrode plate support frames 2, and each group of electrode plate positioning card plates 10 includes two oppositely arranged electrode plate positioning card plates 10, and multiple electrode plate positioning card plates 10 are respectively provided with positioning card slots, the bottom of the electrode plate 5 is attached to the electrode plate support frame 2, and the top end of the electrode plate 5 is set in the positioning card slot.

[0038] Furthermore, the interval between every two adjacent positioning slots on the electrode positioning card plate 10 is 5-36 mm. The positioning slot interval is set so that the interval between every two adjacent electrode plates 5 is 5-36 mm, which enables several electrode plates 5 to react with higher current density and flow rate in the electrolytic cell 4.

[0039] Furthermore, a plurality of support tubes 11 are provided on the inner wall of the water outlet trough 3 , and both ends of the support tubes 11 are respectively connected to the inner wall of the water outlet trough 3 .

[0040] Specifically, the two ends of the plurality of support tubes 11 are respectively connected to the two side plates in the water outlet trough 3, so that the water outlet trough 3 can be stabilized and easy to use.

[0041] Furthermore, a supporting steel frame 12 matching the bottom end of the water tank body 1 is provided on the outside of the water tank body 1, and a reinforcing rib 13 is provided on the outer wall of the water tank body 1. Through the design of the supporting steel frame 12, the stability of the water tank body 1 can be ensured, and the design of the reinforcing rib 13 can further ensure the overall stability of the water tank body 1.

[0042] Furthermore, the electrode plate 5 is a low-carbon steel plate or a pure iron plate with a size of 400*600*5 mm. The electrode plate 5 can be easily taken out from the electrode plate positioning clamp 10.

[0043] More specifically, through structural improvements to the water tank body 1, the inner cavity of the water tank body 1 is made into a four-slot type, that is, the upper middle part is the water outlet slot 3, the lower middle part is the U-shaped water inlet slot 6, and the two side slots are electrolytic cells 4 directly connected to the U-shaped water inlet slot 6; after the wastewater enters the U-shaped water inlet slot 6 from the water inlet pipe 7, the wastewater flows into the electrolytic cells 4 on the left and right sides, and under the action of the electric field, the wastewater passes through the electrode plate 5 to generate new ferrous ions and aluminum ions, and then through a series of hydrolysis, polymerization and ferrous oxidation-reduction processes, various hydroxyl complexes, polynuclear hydroxyl complexes and hydroxides are formed, and then after the wastewater flows and converges in the water outlet slot 3, these substances can cause the pollutants in the wastewater to further react in the water outlet slot 3, such as condensation, adsorption, entrainment, etc., and finally the wastewater flows out from the water outlet pipe 9.

[0044] Example 2

[0045] Combine Figure 5-Figure 7As shown, the utility model provides an efficient removal device for harmful pollutants in wastewater by an electric flocculation method, comprising a water tank body 1, the inner cavity of the water tank body 1 is provided with a plurality of electrode plate support frames 2 and three water outlet troughs 3, the three water outlet troughs 3 are arranged in the inner cavity of the water tank body 1 from front to back, and the bottoms of the three water outlet troughs 3 are arranged on the electrode plate support frame 2, and the inner cavity of the water tank body 1 is provided with two electrolytic cells 4, the two electrolytic cells 4 are symmetrically arranged on both sides of the water outlet trough 3 located in the middle position of the three water outlet troughs 3, and the water outlet trough 3 is used to separate two adjacent electrolytic cells 4, a plurality of electrode plates 5 are arranged in the electrolytic cell 4, and the inner cavity of the water tank body 1 is provided with a U-shaped water inlet trough 6 communicating with the electrolytic cell 4, one end of the U-shaped water inlet trough 6 is communicated with a water inlet pipe 7, and the other end of the U-shaped water inlet trough 6 is provided with a slag discharge inspection hole 8, a sealing body is provided on one side of the slag discharge inspection hole 8, and one end of the three water outlet troughs 3 is respectively connected with a water outlet pipe 9.

[0046] Furthermore, multiple groups of electrode plate positioning card plates 10 are respectively provided on the top of multiple electrode plate support frames 2, and each group of electrode plate positioning card plates 10 includes two oppositely arranged electrode plate positioning card plates 10, and multiple electrode plate positioning card plates 10 are respectively provided with positioning card slots, the bottom of the electrode plate 5 is attached to the electrode plate support frame 2, and the top end of the electrode plate 5 is set in the positioning card slot.

[0047] Furthermore, the interval between every two adjacent positioning slots on the electrode positioning card plate 10 is 5-36 mm. The positioning slot interval is set so that the interval between every two adjacent electrode plates 5 is 5-36 mm, which enables several electrode plates 5 to react with higher current density and flow rate in the electrolytic cell 4.

[0048] Furthermore, a plurality of support tubes 11 are provided on the inner wall of the water outlet trough 3 , and both ends of the support tubes 11 are respectively connected to the inner wall of the water outlet trough 3 .

[0049] Specifically, the two ends of the plurality of support tubes 11 are respectively connected to the two side plates in the water outlet trough 3, so that the water outlet trough 3 can be stabilized and easy to use.

[0050] Furthermore, a supporting steel frame 12 matching the bottom end of the water tank body 1 is provided on the outside of the water tank body 1, and a reinforcing rib 13 is provided on the outer wall of the water tank body 1. Through the design of the supporting steel frame 12, the stability of the water tank body 1 can be ensured, and the design of the reinforcing rib 13 can further ensure the overall stability of the water tank body 1.

[0051] Furthermore, the electrode plate 5 is a low-carbon steel plate or a pure iron plate with a size of 400*600*5 mm. The electrode plate 5 can be easily taken out from the electrode plate positioning clamp 10.

[0052] More specifically, through structural improvements to the water tank body 1, the inner cavity of the water tank body 1 is made into a six-slot type, that is, the middle upper part is the middle water outlet trough 3, the middle lower part is the U-shaped water inlet trough 6, and the two side troughs of the middle water outlet trough 3 are electrolytic cells 4 directly connected to the U-shaped water inlet trough 6, and the two electrolytic cells 4 are respectively provided with edge water outlet troughs 3 on one side away from the middle water outlet trough 3; in this way, after the wastewater enters the U-shaped water inlet trough 6 from the water inlet pipe 7, the wastewater flows into the electrolytic cells 4 on the left and right sides, and under the action of the electric field, the wastewater generates new ferrous ions and aluminum ions after passing through the electrode plate 5, and then through a series of hydrolysis, polymerization and ferrous oxidation-reduction processes, various hydroxyl complexes, polynuclear hydroxyl complexes and hydroxides are formed, and then after the wastewater converges in the three water outlet troughs 3 through flow, these substances can cause the pollutants in the wastewater to further react in the three water outlet troughs 3, such as condensation, adsorption, entrainment, etc., and finally the wastewater flows out from the water outlet pipes 9 connected to the water outlet troughs 3.

[0053] The following is a detailed description of the working principle of this equipment for efficiently removing harmful pollutants from wastewater using the electric flocculation method.

[0054] like Figure 1-7 As shown, through the structural improvement of the water tank body 1, the inner cavity of the water tank body 1 is made into a multi-slot type, which promotes the wastewater to enter the U-shaped water inlet groove 6 from the water inlet pipe 7, and then flow into the electrolytic cells 4 on the left and right sides. Under the action of the electric field, the wastewater generates new ferrous ions and aluminum ions after passing through the electrode plate 5, and then through a series of hydrolysis, polymerization and ferrous oxidation-reduction processes, various hydroxyl complexes, polynuclear hydroxyl complexes and hydroxides are formed. After the wastewater flows and converges in the water tank 3, these substances can cause the pollutants in the wastewater to further react in the water outlet groove 3, such as condensation, adsorption, entrainment, etc., and finally the wastewater flows out from the corresponding water outlet pipe 9.

[0055] In summary, through experiments, it is known that this scheme can achieve a removal rate of more than 90% for antimony and inorganic phosphorus in wastewater when treating wastewater with high suspended matter, high organic matter, high antimony and phosphorus through structural innovation of the water tank main body 1; it has a removal rate of more than 95% for suspended matter and a removal rate of 30% to 85% for organic matter; it saves more than 60% of the dosing cost compared with traditional aluminum salt and iron salt; and the iron dissolution capacity of the equipment alone reaches 2kg / h, which is 0.8kg / m3 / h calculated based on the equipment volume. While improving the removal rate of various pollutants, it also improves the iron dissolution efficiency. Moreover, through the spatial optimization combination of the inner cavity of the water tank main body 1, the U-shaped water inlet trough 6 can evenly distribute water to the electrolytic cell 4, and the electrolytic cell 4 can carry out a higher current density and flow rate reaction, effectively saving the equipment volume and floor space, and improving the efficiency per unit area. Moreover, the electrode plate 5 in the electrolytic cell 4 can be easily removed, and the residue and dirt at the bottom of the U-shaped water inlet trough 6 can be easily cleaned through the slag discharge inspection hole 8, which is convenient for maintenance.

[0056] It should be noted that, in the description of this disclosure, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections; they can refer to direct connections or indirect connections through an intermediate medium; they can refer to internal communication between two components or the interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this disclosure based on specific circumstances.

[0057] The above generally describes the present invention in detail. However, it is obvious to those skilled in the art that modifications or improvements may be made to the present invention. Therefore, modifications or improvements that do not depart from the spirit of the present invention are within the scope of protection of the present invention.

Claims

1. An efficient device for removing harmful pollutants from wastewater using an electrocoagulation method, characterized by: The invention comprises a water tank body (1), wherein the inner cavity of the water tank body (1) is provided with a plurality of electrode plate support frames (2) and at least one water outlet trough (3), the bottom of the water outlet trough (3) is provided on the electrode plate support frame (2), and the inner cavity of the water tank body (1) is provided with a plurality of electrolytic cells (4), wherein the plurality of electrolytic cells (4) are symmetrically arranged on both sides of at least one water outlet trough (3), and the water outlet trough (3) is used to connect every two adjacent electrolytic cells (4) Separated, the electrolytic cell (4) is provided with a plurality of electrode plates (5), and the inner cavity of the water tank body (1) is provided with a U-shaped water inlet trough (6) communicating with the electrolytic cell (4), one end of the U-shaped water inlet trough (6) is communicated with a water inlet pipe (7), the other end of the U-shaped water inlet trough (6) is provided with a slag discharge inspection hole (8), one side of the slag discharge inspection hole (8) is provided with a sealing body, and one end of each of the plurality of water outlet troughs (3) is respectively connected with a water outlet pipe (9).

2. The highly efficient wastewater harmful pollutant removal device using an electrocoagulation method according to claim 1 is characterized in that: A plurality of groups of electrode plate positioning clamps (10) are respectively provided on the tops of the plurality of electrode plate support frames (2), and each group of the electrode plate positioning clamps (10) comprises two oppositely arranged electrode plate positioning clamps (10), and positioning slots are respectively provided on the plurality of electrode plate positioning clamps (10).

3. The highly efficient wastewater harmful pollutant removal device using an electrocoagulation method according to claim 2, characterized in that: The bottom of the electrode plate (5) is attached to the electrode plate support frame (2), and the top end of the electrode plate (5) is arranged in a positioning slot.

4. The highly efficient wastewater harmful pollutant removal device using an electrocoagulation method according to claim 3 is characterized in that: The interval between every two adjacent positioning slots on the electrode positioning card plate (10) is 5-36 mm.

5. The highly efficient wastewater harmful pollutant removal device using an electro-flocculation method according to claim 1, characterized in that: The inner wall of the water outlet trough (3) is provided with a plurality of support tubes (11), and both ends of the support tubes (11) are respectively connected to the inner wall of the water outlet trough (3).

6. The highly efficient wastewater harmful pollutant removal device using an electro-flocculation method according to claim 1, characterized in that: A supporting steel frame (12) matching the bottom end of the water tank body (1) is provided on the outside of the water tank body (1).

7. The highly efficient wastewater harmful pollutant removal device using an electro-flocculation method according to claim 1, characterized in that: The outer wall of the water tank body (1) is provided with reinforcing ribs (13).

8. The highly efficient wastewater harmful pollutant removal device using an electro-flocculation method according to claim 1, characterized in that: The electrode plate (5) is a low-carbon steel plate or a pure iron plate.

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