An integrated electrocoagulation, air flotation, and atomization oil-sludge separation machine

Abstract

This application relates to an integrated electrocoagulation, air flotation, and atomization oil-water separation machine, comprising a frame and an electrocoagulation tank, a chemical sedimentation tank, and several dosing tanks mounted on the frame. The electrocoagulation tank includes a first pH adjustment tank, an electrolyzer tank, a first slow mixing tank, an air flotation tank, a pH clear water tank, and a first clear water tank. The chemical sedimentation tank includes a second pH adjustment tank, a fast mixing tank, a second slow mixing tank, a third pH adjustment tank, a sedimentation tank, a neutralization tank, and a second clear water tank. First, electrocoagulation technology treats the difficult-to-treat oil-water emulsion in kitchen wastewater. Then, chemical sedimentation is used to flocculate dissolved organic matter, microorganisms, and bacteria in the wastewater, further improving the cleanliness of the treated water. This allows the water to meet the standards for direct discharge or reuse, significantly improving the efficiency of wastewater treatment.

Description

Technical Field

[0001] This application relates to the technical field of electrocoagulation, and in particular to an integrated electrocoagulation, air flotation, atomization, and oil-sludge separation machine. Background Technology

[0002] The grease in high-concentration kitchen wastewater is mostly in an emulsified state, usually forming a stable oil-water emulsion. Conventional gravity separation is difficult to break the emulsion. Therefore, when treating high-concentration kitchen wastewater, it is usually necessary to add an additional demulsifier for oil-water separation. However, this treatment method is relatively slow. When treating large quantities of kitchen wastewater, not only is a large amount of demulsifier required for oil-water separation, resulting in high costs, but the slow demulsification speed also makes it difficult to meet the needs of rapid, large-scale centralized treatment of kitchen oily wastewater.

[0003] While electrocoagulation technology can rapidly break up oil-water emulsions in kitchen wastewater, the wastewater still contains dissolved organic matter, excessive nitrogen and phosphorus, and excessive microorganisms. The treated effluent still cannot meet the standards for direct discharge or recycling. Summary of the Invention

[0004] To address the issue that chemical methods or electrocoagulation technology alone are insufficient for treating kitchen wastewater, this application provides an integrated electrocoagulation-air flotation-atomization oil-water separation machine.

[0005] The integrated electrocoagulation-air flotation-atomization oil-sludge separation machine provided in this application adopts the following technical solution:

[0006] An integrated electrocoagulation, air flotation, atomization, and oil-sludge separation machine includes a frame, an electrocoagulation tank mounted on the frame, a chemical precipitation tank mounted on the frame, and several dosing tanks. The electrocoagulation tank includes a first pH adjustment tank, an electrolyzer tank, a first slow mixing tank, an air flotation tank, a pH clear water tank, and a first clear water tank. The chemical precipitation tank includes a second pH adjustment tank, a fast mixing tank, a second slow mixing tank, a third pH adjustment tank, a sedimentation tank, a neutralization tank, and a second clear water tank. The first, second, and third pH adjustment tanks are all used to adjust the pH value of the wastewater. The electrolyzer tank is used for electrocoagulation of the wastewater. The first and second slow mixing tanks are both used to promote floc formation and expansion through a mild hydraulic environment. The fast mixing tank is used to add chemicals to quickly generate small flocs. The air flotation tank is used to remove sludge through air flotation. The sedimentation tank is used to settle the flocs. The neutralization tank is used to adjust the pH value of the final effluent. The first and second clear water tanks are both used to store the effluent.

[0007] The above technical solution involves first transferring the wastewater from the wastewater collection tank to the first pH adjustment tank to adjust the pH, then transferring the wastewater to the electrolyzer tank for electrocoagulation. The wastewater containing small flocs is then transferred to the first slow mixing tank to coagulate the small flocs into larger flocs. Next, the wastewater is transferred to the flotation tank for sludge removal. The removed sludge is then transferred to the oil collection tank for centralized waste oil treatment. The purified water after sludge removal is transferred to the pH clear water tank for pH adjustment before being transferred to the first clear water tank for storage. The clear water in the first clear water tank is then transferred to the second pH adjustment tank to adjust the pH value, and then sequentially transferred to the fast mixing tank and slow mixing tank to remove dissolved organic matter. After flocs are formed, the water is transported to the third pH adjustment tank to adjust the pH value, and finally to the sedimentation tank for sedimentation. The clear water after sedimentation is transported to the intermediate mixing tank for final acid-base balance, and then to the second clear water tank for storage or reuse. By combining electrocoagulation and chemical precipitation technologies, the difficult-to-treat oil-water emulsion in kitchen wastewater is first treated by electrocoagulation, and then the dissolved organic matter, microorganisms, and bacteria in the wastewater are flocculated by chemical precipitation. This further improves the cleanliness of the treated water, enabling it to meet the standards for direct discharge or reuse, and greatly improves the efficiency of wastewater treatment.

[0008] Optionally, the first slow mixing tank, the first pH adjustment tank, and the pH clear water tank are located between the electrolyzer tank and the flotation tank, with the first clear water tank located on the side of the flotation tank away from the electrolyzer tank.

[0009] Optionally, the electrolyzer cell contains an array of several electrode plates, with a spacing of 2-5 cm between the electrode plates. The electrolyzer cell is equipped with a slag removal device for removing the condensed layer from the electrode plates.

[0010] Optionally, the slag removal device includes several high-pressure blowers mounted on the frame and jet pipes mounted on the electrolyzer tank. The outlet of the high-pressure blowers is connected to the jet pipes. One end of the jet pipes extends to the electrode plate array. The end of the jet pipes located at the electrode plate array is provided with several nozzles, which spray toward the electrode plate array.

[0011] Optionally, the electrode array in the electrolyzer cell is located in the middle of the electrolyzer cell, and both ends of the electrolyzer cell are provided with jet pipes. The air inlet of each jet pipe is connected to the air outlet of a high-pressure blower. The jet pipes on both sides of the electrolyzer cell are slidably installed in the electrolyzer cell through sliding pipes, and the two jet pipes slide relative to each other or away from each other. The electrolyzer cell is provided with a driving mechanism to drive the sliding pipes to slide. The two jet pipes can slide to the upper side of the electrode array to spray high-pressure air to clean the electrode array.

[0012] Optionally, the driving mechanism includes four mounting pipes evenly distributed on both sides of the opening of the electrolyzer cell. Two mounting pipes on the same side are located at the two ends of the opening of the electrolyzer cell. A connecting pipe is slidably installed in the mounting pipe. Two connecting holes are opened at intervals along the length of the upper side of the mounting pipe. The two connecting holes are connected by a pipe. The connecting pipe is circumferentially fixed to the mounting pipe. A vent hole is opened on the upper side wall of the connecting pipe. The connecting pipe can slide until the vent hole corresponds to any one of the connecting holes. The end of the connecting pipe inside the mounting pipe is closed. Two sliding pipes of the same jet pipe are connected and communicate with the two connecting pipes located at the same end. The sliding pipe communicates with the jet pipe. The air inlet end of the mounting pipe is connected to the air outlet end of the high-pressure blower. The jet pipe is connected to the high-pressure blower through the sliding pipe, the mounting pipe, and the connecting pipe. A reset mechanism for resetting the jet pipe is provided between the two jet pipes.

[0013] Optionally, the reset mechanism includes a pressure rod slidably mounted on an electrolyzer cell between two jet pipes. Connecting rods are rotatably mounted on opposite sides of the pressure rod. One end of each connecting rod is rotatably connected to one of the two jet pipes. When the two jet pipes slide relative to or away from each other, the jet pipes can push the pressure rod to slide through the connecting rods. A reset spring is sleeved on the pressure rod. One end of the reset spring is connected to the pressure rod, and the other end of the reset spring abuts against the electrolyzer cell. Under normal conditions, the reset spring pushes the connecting rods to unfold through the pressure rod, at which point both jet pipes are in their initial positions.

[0014] Optionally, the pressure rod has an inner cavity, the electrolyzer cell has a gas supply pipe, the pressure rod is sealed and slidably sleeved on the gas supply pipe, and the gas supply pipe is connected to the air outlet of the high-pressure blower through a pipe.

[0015] Optionally, each electrolyzer cell at the sliding tube is provided with a bracket, and a first guide wheel is rotatably mounted on the bracket. The side wall of the first guide wheel is coaxially provided with an annular groove, and the sliding tube is slidably mounted in the annular groove. A second guide wheel is rotatably mounted on the bracket, and the side wall of the second guide wheel is also coaxially provided with an annular groove. The second guide wheel is located on the upper side of the sliding tube, and the upper side of the sliding tube is slidably mounted in the annular groove of the second guide wheel.

[0016] Optionally, the slag removal device uses a cyclic start-up method for slag removal.

[0017] In summary, this application first transports the wastewater from the wastewater collection tank to the first pH adjustment tank to adjust the pH, then transports the wastewater to the electrolyzer tank for electrocoagulation, and then transports the wastewater containing small flocs to the first slow mixing tank to coagulate the small flocs into larger flocs. Next, the wastewater is transported to the flotation tank for flotation sludge removal. The removed sludge is transported to the oil collection tank for centralized waste oil treatment. The purified water after sludge removal is transported to the pH clear water tank to adjust the pH, and then transported to the first clear water tank for storage. The purified water in the first clear water tank is then transported to the second pH adjustment tank to adjust the pH value, and then sequentially transported to the fast mixing tank and slow mixing tank to precipitate the dissolved organic matter in the purified water. After floc formation, the water is transported to the third pH adjustment tank to adjust the pH value, and finally to the sedimentation tank for sedimentation. After sedimentation, the clear water is transported to the intermediate mixing tank for final acid-base balance, and then to the second clear water tank for storage or reuse. By combining electrocoagulation and chemical precipitation technologies, the difficult-to-treat oil-water emulsion in kitchen wastewater is first treated by electrocoagulation, and then the dissolved organic matter, microorganisms, and bacteria in the wastewater are flocculated by chemical precipitation, which further improves the cleanliness of the treated water and enables the water to meet the standards for direct discharge or reuse, greatly improving the efficiency of wastewater treatment. Attached Figure Description

[0018] Figure 1 This is an engineering schematic diagram from a top-down view of this application.

[0019] Figure 2 This is an engineering schematic diagram of the front view of this application.

[0020] Figure 3 This is a three-dimensional structural diagram of the electrolyzer cell of this application, in which the reset spring is in a compressed state.

[0021] Figure 4 This is a cross-sectional view of the installation pipe in this application.

[0022] Figure 5 This is a cross-sectional view of the pressure bar in this application, where the return spring is in a compressed state.

[0023] Those skilled in the art will understand that the elements in the accompanying drawings are shown for simplicity and clarity and are not necessarily drawn to scale. For example, the size and position of some elements in the drawings may be enlarged relative to other elements to aid in understanding the embodiments of the invention.

[0024] Attached reference numerals: 1. Frame; 11. Dosing tank; 2. Electrocoagulation tank; 21. First pH adjustment tank; 22. Electrolyzer tank; 23. First slow mixing tank; 24. Air flotation tank; 25. pH clear water tank; 26. First clear water tank; 3. Chemical sedimentation tank; 31. Second pH adjustment tank; 32. Fast mixing tank; 33. Second slow mixing tank; 34. Third pH adjustment tank; 35. Sedimentation tank; 36. Neutralization tank; 37. Second clear water tank; 4. Slag removal device; 41. Jet pipe; 42. Sliding pipe; 43. Connecting rod; 5. Drive mechanism; 51. Mounting pipe; 511. Connecting hole; 52. Connecting pipe; 521. Vent hole; 53. U-shaped pipe; 6. Reset mechanism; 61. Pressure rod; 611. Inner cavity; 62. Connecting rod; 63. Reset spring; 64. Retaining ring; 65. Air supply pipe; 7. Support; 71. First guide wheel; 72. Second guide wheel; 73. Annular groove. Detailed Implementation

[0025] The following is in conjunction with the appendix Figures 1-5 This application will be described in further detail.

[0026] This application discloses an integrated electrocoagulation, air flotation, atomization, and oil-sludge separation machine, referring to... Figure 1 and Figure 2 It includes a frame 1 serving as the mounting base, an electrocoagulation tank 2, a chemical precipitation tank 3, and several dosing tanks 11 located on the frame 1.

[0027] Reference Figure 1 and Figure 2 The electrocoagulation tank 2 includes a rectangular first shell fixedly installed on the frame 1, a rectangular first pH adjustment tank 21, a rectangular electrolyzer tank 22, a rectangular first slow mixing tank 23, a rectangular air flotation tank 24, a rectangular pH clear water tank 25, and a rectangular first clear water tank 26.

[0028] Reference Figure 1 and Figure 2 The first pH adjustment tank 21 is used to adjust the pH value of the wastewater, the electrolyzer tank 22 is used to electrocoagulate the wastewater, the first slow mixing tank 23 is used to promote the formation and expansion of flocs through a mild hydraulic environment, the flotation tank 24 is used to remove sludge through flotation, the first clear water tank 26 is used to store the wastewater, and the dosing tank 11 is used to add chemicals to the above tanks.

[0029] Reference Figure 1 and Figure 2The shell surrounds the first pH adjustment tank 21, the electrolyzer tank 22, the first slow mixing tank 23, the flotation tank 24, the pH clear water tank 25, and the first clear water tank 26. The first pH adjustment tank 21, the first slow mixing tank 23, and the clear water tank are arranged side by side along the width of the shell to facilitate the movement of water between them. The electrolyzer tank 22 is located on one side of the first pH adjustment tank 21, and the flotation tank 24 is located on the other side of the first pH adjustment tank 21.

[0030] Reference Figure 1 and Figure 2 During wastewater treatment, the oily wastewater from the kitchen is first transported from the wastewater collection tank to the first pH adjustment tank 21. Then, chemicals are added to the first pH adjustment tank 21 through the dosing tank 11 to adjust the pH value of the wastewater. In this embodiment, acidic kitchen wastewater is used as an example, and Ca(OH)2 needs to be added to the first pH adjustment tank 21 through the dosing tank 11 to neutralize the acidity of the kitchen wastewater.

[0031] Reference Figure 1 and Figure 2 After pH adjustment, the wastewater is sent to electrolyzer tank 22, where an array of electrode plates is fixedly installed. The electrode plates are arranged parallel to each other, and the spacing between two electrode plates is designed to be 2-5 cm. By applying voltage to the electrode plates, the electrode plates are energized to carry out an electrochemical oxidation-reduction reaction on the wastewater, breaking down the chemical bonds of organic matter and complex heavy metal complex chains or chelate chains in the wastewater, breaking down large molecules into small molecules. The heavy metal ions after chain breaking and oxidation co-precipitate with the iron or aluminum salts precipitated from the iron or aluminum electrode plates, participating in the replacement reaction of gaining or losing electrons (mainly with Fe and Al ions in the water). In the end, some of them will become fine molecular particles that precipitate or still float out or co-precipitate as metal ion hydroxide precipitates with Fe hydroxide.

[0032] The above process is called electrocoagulation. After electrocoagulation, the wastewater is transported to the first slow mixing tank 23. The volume of the flocs is increased by the relatively mild hydraulic environment in the first slow mixing tank 23. Then, the wastewater with increased floc volume is transported to the flotation tank 24 for sludge removal. Finally, the clear water after sludge removal is transported to the pH clear water tank 25. After the dosing tank 11 adds chemicals to the pH clear water tank 25 to balance the pH value of the clear water, the finally neutralized clear water is transported to the clear water tank for storage for the next step of treatment.

[0033] Reference Figure 1 and Figure 2The chemical precipitation tank 3 includes a rectangular second shell, a rectangular second pH adjustment tank 31, a rectangular rapid mixing tank 32, a rectangular second slow mixing tank 33, a rectangular third pH adjustment tank 34, a rectangular sedimentation tank 35, a rectangular neutralization tank 36, and a rectangular second clear water tank 37. The second shell surrounds the above tanks for protection.

[0034] Reference Figure 1 and Figure 2 The second pH adjustment tank 31 and the third pH adjustment tank 34 are both used to adjust the pH value of the wastewater. The second slow mixing tank 33 is used to promote the formation and expansion of flocs through a mild hydraulic environment. The fast mixing tank 32 is used to add drugs to quickly generate small flocs. The sedimentation tank 35 is used to settle flocs. The intermediate mixing tank 36 is used to adjust the pH value of the final effluent. The second clear water tank 37 is used to store the effluent.

[0035] Reference Figure 1 and Figure 2 The clean water in the first clear water tank 26 is first transported to the second pH adjustment tank 31. During the transport process, in order to reduce the effluent index, chemicals are added to the clean water through the dosing tank 11 to adjust the pH value. After the pH value of the clean water is adjusted, it will fluctuate. Therefore, chemicals need to be transported to the second pH adjustment tank 31 through the dosing tank 11 to adjust the pH value of the clean water. Then the clean water is transported to the rapid mixing tank 32. After flocculant is added to the rapid mixing tank 32 through the dosing tank 11, the organic matter, microorganisms, bacteria and viruses dissolved in the clean water are precipitated and flocculated through the rapid mixing tank 32 in conjunction with the flocculant. Then the wastewater with small flocs is transported to the second slow mixing tank 33 to allow the flocs to grow. Then it is transported to the third pH adjustment tank 34 to adjust the pH value of the wastewater. Finally, it is transported to the sedimentation tank 35 for physical sedimentation.

[0036] Reference Figure 1 and Figure 2 After sedimentation, the clear water is first transported to the intermediate mixing tank 36 for final pH adjustment, and then transported to the second clear water tank 37 for storage or direct reuse.

[0037] Reference Figure 1 and Figure 2 The kitchen wastewater treated by the above electrocoagulation-chemical precipitation method can be directly reused. Moreover, the oil residue separated by the flotation tank 24 can be processed and refined into diesel oil, and the sludge settled by the sedimentation tank 35 can be used as compost, thus realizing the resource utilization and harmless treatment of kitchen wastewater.

[0038] Reference Figure 1 and Figure 3The electrode plate array in the electrolyzer cell 22 is located in the middle of the electrolyzer cell 22, so that when the electrocoagulation is carried out, the wastewater can flow from both sides of the electrolyzer cell 22 to the middle, which facilitates the full contact between the wastewater and the electrode plate array.

[0039] Reference Figure 3 , Figure 4 and Figure 5 An electrolyzer cell 22 is equipped with a slag removal device 4, which includes several high-pressure blowers fixedly installed on the frame 1 and two jet pipes 41, referred to as the two jet pipes 41. Electrode plates are not provided at either end of the length direction of the electrolyzer cell 22. The two jet pipes 41 are respectively located at both ends of the electrolyzer cell 22, and a sliding pipe 42 is fixedly connected to both sides of the jet pipe 41 along the length direction of the electrolyzer cell 22. The sliding pipe 42 is located at the opening of the electrolyzer cell 22.

[0040] Reference Figure 3 , Figure 4 and Figure 5 Each part of the electrolyzer cell 22 with the sliding tube 42 is fixedly installed with a bracket 7. The bracket 7 is rotatably mounted with two first guide wheels 71 and two second guide wheels 72. The two first guide wheels 71 are arranged along the length of the electrolyzer cell 22, and the two second guide wheels 72 are arranged along the length of the electrolyzer cell 22. The second guide wheels 72 are located on the upper side of the first guide wheels 71.

[0041] Reference Figure 3 , Figure 4 and Figure 5 Both the first guide wheel 71 and the second guide wheel 72 have annular grooves 73 coaxially formed in the middle of their side walls. The cross-section of the annular grooves 73 is equilateral triangular. The sliding tube 42 is mounted in the annular groove 73 of the first guide wheel 71 and is installed in the electrolyzer cell 22 by the rolling and sliding of the first guide wheel 71. At the same time, the upper side of the sliding tube 42 is located in the annular groove 73 of the second guide wheel 72. The second guide wheel 72 restricts the jumping of the sliding tube 42 during sliding, making the sliding of the sliding tube 42 more stable.

[0042] Reference Figure 3 , Figure 4 and Figure 5 The sliding tubes 42 located at both ends of the electrolyzer cell 22 can slide relative to each other or away from each other. When the sliding tubes 42 at both ends of the electrolyzer cell 22 slide relative to each other to a designated position, the two jet pipes 41 slide relative to each other to the upper side of the electrode array under the drive of the sliding tubes 42. At this time, one end of the jet pipe 41 extends to the electrode array, and the part of the jet pipe 41 located at the electrode array is arranged in an array. Several nozzles are fixedly installed on the end of the jet pipe 41 arranged in an array, and the nozzles spray towards the electrode array.

[0043] Reference Figure 3 , Figure 4 and Figure 5 The jet pipe 41 is connected to the high-pressure blower. The high-pressure air generated by the high-pressure blower is sprayed along the jet pipe 41 onto the electrode array. The impact of the high-pressure air and the disturbance of the water flow driven by the high-pressure air loosen the organic matter accumulated on the electrode plate, causing the organic matter to fall off the electrode plate and preventing the accumulation of organic matter on the electrode plate from causing electron transfer between the electrode plate and the wastewater.

[0044] Reference Figure 3 , Figure 4 and Figure 5 The high-pressure blower operates in a cyclic start-up mode, stopping after a fixed duration each time it starts. The cyclic start-up interval and the start-up duration of the high-pressure blower in a single cycle are adaptively adjusted according to the different impurity content and types in the kitchen wastewater of different regions.

[0045] Reference Figure 3 , Figure 4 and Figure 5 The electrolyzer cell 22 is equipped with a drive mechanism 5. The drive mechanism 5 includes four mounting pipes 51 fixedly installed at the opening of the electrolyzer cell 22. The four mounting pipes 51 correspond to four sliding pipes 42 respectively. A connecting pipe 52 is sealed and slidably installed in the mounting rod. One end of the mounting pipe 51 is connected to the air outlet of the high-pressure blower through a fixed pipe. The connecting pipe 52 extends out from the other end of the mounting pipe 51. The end of the connecting pipe 52 extending out from the mounting pipe 51 is coaxially and integrally connected to one end of the sliding pipe 42, and the connecting pipe 52 communicates with the sliding pipe 42.

[0046] Reference Figure 3 , Figure 4 and Figure 5 The end of the sliding tube 42 away from the connecting tube 52 is closed. A piston is fixedly installed at the end of the connecting tube 52 located inside the mounting tube 51. The piston closes the end of the connecting tube 52 located inside the mounting tube 51, and the piston and the mounting tube 51 are in a sealed sliding fit.

[0047] Reference Figure 3 , Figure 4 and Figure 5A vent hole 521 is provided through the upper side wall of one end of the connecting pipe 52 located inside the mounting pipe 51. Two connecting holes 511 are provided through the upper side wall of the connecting pipe 52, and the two connecting holes 511 are arranged along the length of the connecting pipe 52. The two connecting holes 511 are sealed and fixedly connected by a U-shaped tube 53. The mounting pipe 51 can slide to connect with either the vent hole 521. When the end of the mounting pipe 51 with the piston slides between the two connecting holes 511 and the jet pipe 41 has slid to the electrode plate array, the connecting hole 511 of the connecting pipe 52 away from the end connected to the high-pressure blower is connected to the vent hole 521. At this time, the compressed air output by the high-pressure blower enters the mounting pipe 51, is transported along the U-shaped tube 53 to the connecting pipe 52, then along the connecting pipe 52 to the sliding pipe 42, then along the sliding pipe 42 to the jet pipe 41, and finally sprayed out from the nozzle to clean the electrode plate array.

[0048] Reference Figure 3 , Figure 4 and Figure 5 A connecting rod 43 is provided between the two sliding tubes 42 at the same end of the electrolyzer cell 22. The two ends of the connecting rod 43 are fixedly connected to the two sliding tubes 42 respectively. Through the cooperation of the sliding tubes 42, the first guide wheel 71, the second guide wheel 72 and the connecting rod 43, the connecting tube 52 is circumferentially fixed with the mounting tube 51 when sliding.

[0049] Reference Figure 3 , Figure 4 and Figure 5 A reset mechanism 6 is provided between the two sliding tubes 42 located on the same side of the length direction of the electrolyzer cell 22. The reset mechanism 6 includes a gas supply pipe 65 that is vertically fixed and installed on the top wall of the electrolyzer cell 22. The gas supply pipe 65 is slidably fitted with a pressure rod 61. The inner cavity 611 of the pressure rod 61 is connected to the inner hole of the gas supply pipe 65, and the pressure rod 61 and the gas supply pipe 65 are sealed and slidably fitted together.

[0050] Reference Figure 3 , Figure 4 and Figure 5 The air supply pipe 65 is connected to the air outlet of the high-pressure blower via a pipeline. A connecting rod 62 is rotatably mounted on each of the opposite side walls of the pressure rod 61. The axis of rotation between the connecting rod 62 and the pressure rod 61 is horizontal. The ends of the two connecting rods 62 furthest from the pressure rod 61 are rotatably connected to two sliding pipes 42, respectively. A return spring 63 is fitted onto the pressure rod 61. A retaining ring 64 is provided at the lower end of the pressure rod 61. One end of the return spring 63 abuts against the retaining ring 64, and the other end of the return spring 63 abuts against the electrolyzer cell 22.

[0051] Reference Figure 3 , Figure 4 and Figure 5In the initial state, when both jet pipes 41 are located at both ends of the length of the electrolyzer cell 22, both connecting rods 62 are horizontal and extended. When the high-pressure blower is started, the compressed air output by the high-pressure blower will enter the mounting pipe 51, and then push the piston and the connecting pipe 52 to slide. At the same time, the compressed air output by the high-pressure blower will also enter the intake pipe, and then enter the inner cavity 611 of the pressure rod 61 along the intake pipe, pushing the pressure rod 61 to rise. Through the push of the compressed air on one end of the connecting pipe 52 and the pull of the connecting rod 62 on the other end of the connecting pipe 52, the connecting pipe 52 and the sliding pipe 42 are made to slide more stably and quickly.

[0052] Reference Figure 3 , Figure 4 and Figure 5 When the sliding tube 42 slides to the point where the vent 521 connects with the connecting hole 511, compressed air enters the connecting tube 52 along the connecting hole 511 and the U-shaped tube 53, then enters the jet pipe 41 along the connecting tube 52 and the sliding tube 42, and finally exits from the nozzle of the jet pipe 41.

[0053] Reference Figure 3 , Figure 4 and Figure 5 At this time, the return spring 63 is compressed. The cooperation between the return spring 63, the retaining ring 64 and the electrolyzer cell 22 limits the sliding of the pressure rod 61 and the sliding of the sliding tube 42. This allows the compressed air output by the high-pressure blower to pass smoothly through the U-shaped tube 53 into the sliding tube 42 and prevents the connecting tube 52 from being pushed out of the installation tube 51 by the compressed air.

[0054] Reference Figure 3 , Figure 4 and Figure 5 When the high-pressure blower stops working after one cycle, the pressure rod 61 slides down under the push of the return spring 63, and then pushes the sliding tube 42 and the jet pipe 41 to reset through the pressure rod 61.

[0055] Reference Figure 3 , Figure 4 and Figure 5 By using the sliding jet pipe 41, the jet pipe 41 is less likely to interfere with the flow of sewage when the electrode array electrolyzes sewage. Moreover, the jet pipe 41 moves and sprays air at regular intervals, which will also stir and disturb the water in the electrolyzer tank 22, so that some water in the electrolyzer tank 22 will not remain at the bottom without being electrolyzed.

[0056] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An integrated electrocoagulation, air flotation, atomization, and oil-sludge separation machine, characterized in that: The equipment includes a frame (1), an electrocoagulation tank (2) located on the frame (1), a chemical precipitation tank (3) located on the frame (1), and several dosing tanks (11). The electrocoagulation tank (2) includes a first pH adjustment tank (21), an electrolyzer tank (22), a first slow mixing tank (23), an air flotation tank (24), a pH clear water tank (25), and a first clear water tank (26). The chemical precipitation tank (3) includes a second pH adjustment tank (31), a fast mixing tank (32), a second slow mixing tank (33), a third pH adjustment tank (34), a sedimentation tank (35), and a medium pH adjustment tank (36). The electrolyzer (22) is used for electrocoagulation of wastewater. The electrode array in the electrolyzer (22) is located in the middle of the electrolyzer (22). Both ends of the electrolyzer (22) are provided with jet pipes (41). The air inlet of the jet pipes (41) is connected to the air outlet of the high-pressure blower. The jet pipes (41) on both sides of the electrolyzer (22) are slidably installed in the electrolyzer (22) through sliding pipes (42), and the two jet pipes (41) slide relative to each other or in opposite directions. (22) A driving mechanism (5) is provided to drive the sliding tube (42) to slide. Two jet pipes (41) can slide to the upper side of the electrode array to spray high-pressure air to clean the electrode array. A reset mechanism (6) is provided between the two jet pipes (41) to reset the jet pipes (41). The reset mechanism (6) includes a pressure rod (61) that is slidably installed between the two jet pipes (41) and is mounted on the electrolyzer cell (22). Connecting rods (62) are rotatably installed on both sides of the pressure rod (61). One end of the two connecting rods (62) is split into two sections. The two jet pipes (41) are connected by a rotating mechanism. When the two jet pipes (41) slide relative to or away from each other, the jet pipes (41) can push the pressure rod (61) to slide through the connecting rod (62). The pressure rod (61) is fitted with a return spring (63). One end of the return spring (63) is connected to the pressure rod (61), and the other end of the return spring (63) abuts against the electrolyzer cell (22). Under normal conditions, the return spring (63) pushes the connecting rod (62) to unfold through the pressure rod (61). At this time, both jet pipes (41) are in the initial position.

2. The integrated electrocoagulation-air flotation-atomization oil-sludge separation machine according to claim 1, characterized in that: The first slow mixing tank (23), the first pH adjustment tank (21), and the pH clear water tank (25) are located between the electrolyzer tank (22) and the flotation tank (24), and the first clear water tank (26) is located on the side of the flotation tank (24) away from the electrolyzer tank.

3. The integrated electrocoagulation-air flotation-atomization oil-sludge separation machine according to claim 1, characterized in that: The electrolyzer cell (22) is equipped with a number of electrode plates arranged in an array, with a spacing of 2 cm to 5 cm between the electrode plates. The electrolyzer cell (22) is equipped with a slag removal device (4) for removing the condensed layer of the electrode plates.

4. The integrated electrocoagulation-air flotation-atomization oil-sludge separation machine according to claim 3, characterized in that: The slag removal device (4) includes several high-pressure blowers installed on the frame (1) and jet pipes (41) installed in the electrolyzer pool (22). The outlet of the high-pressure blower is connected to the jet pipe (41). One end of the jet pipe (41) extends to the electrode plate array. The end of the jet pipe (41) located at the electrode plate array is provided with several nozzles, which spray towards the electrode plate array.

5. The integrated electrocoagulation-air flotation-atomization oil-sludge separation machine according to claim 1, characterized in that: The driving mechanism (5) includes four mounting pipes (51) evenly distributed on both sides of the opening of the electrolyzer cell (22). Two mounting pipes (51) on the same side are located at both ends of the opening of the electrolyzer cell (22). A connecting pipe (52) is slidably installed in the mounting pipe (51). Two connecting holes (511) are opened at intervals along the length of the upper side of the mounting pipe (51). The two connecting holes (511) are connected by a pipe. The connecting pipe (52) is circumferentially fixed to the mounting pipe (51). A vent hole (52) is opened on the upper side wall of the connecting pipe (52). 1) The connecting pipe (52) can slide to correspond to the ventilation hole (521) and any one of the connecting holes (511). The end of the connecting pipe (52) located inside the mounting pipe (51) is closed. The two sliding pipes (42) of the same jet pipe (41) are connected and communicate with the two connecting pipes (52) located at the same end. The sliding pipe (42) communicates with the jet pipe (41). The air inlet end of the mounting pipe (51) is connected to the air outlet end of the high-pressure blower. The jet pipe (41) is connected to the high-pressure blower through the sliding pipe (42), the mounting pipe (51) and the connecting pipe (52).

6. The integrated electrocoagulation-air flotation-atomization oil-sludge separation machine according to claim 1, characterized in that: The pressure rod (61) has an inner cavity (611), the electrolyzer cell (22) has a gas supply pipe (65), the pressure rod (61) is sealed and slidably sleeved on the gas supply pipe (65), and the gas supply pipe (65) is connected to the air outlet of the high-pressure blower through a pipe.

7. The integrated electrocoagulation-air flotation-atomization oil-sludge separation machine according to claim 1, characterized in that: Each of the electrolyzer cells (22) at the sliding tube (42) is provided with a bracket (7). The bracket (7) is rotatably mounted with a first guide wheel (71). The side wall of the first guide wheel (71) is coaxially provided with an annular groove (73). The sliding tube (42) is slidably mounted in the annular groove (73). The bracket (7) is rotatably mounted with a second guide wheel (72). The side wall of the second guide wheel (72) is also coaxially provided with an annular groove (73). The second guide wheel (72) is located on the upper side of the sliding tube (42). The upper side of the sliding tube (42) is slidably mounted in the annular groove (73) of the second guide wheel (72).

8. The integrated electrocoagulation-air flotation-atomization oil-sludge separation machine according to claim 4, characterized in that: The slag removal device (4) is used for slag removal in a cyclic start-up manner.

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