A device and method for treating petrochemical oily wastewater

Abstract

The application discloses a device and method for treating oil-containing wastewater in petroleum chemical industry, and belongs to the technical field of treating wastewater in petroleum chemical industry. The existing device for treating oil-containing wastewater is inconvenient for cleaning residual oil on the surface of a filter element and is insufficient for cleaning the residual oil. The device for treating oil-containing wastewater in petroleum chemical industry comprises a main support, a supporting frame, a pollution discharge frame and the like. The supporting frame is fixedly connected to the upper portion of the main support, the drainage frame is fixedly connected to one side of the supporting frame, the drainage opening is arranged above the drainage frame, and the pollution discharge frame is fixedly connected to the lower portion of one side of the supporting frame. The wastewater flowing away from the side of the driving frame passes through the filter plate and enters the space between the piston frame and the filter plate, the oil-containing wastewater on the surface of the filter plate is pushed by the wastewater, part of the oil on the surface of the filter plate is washed into the space between the piston frame and the filter plate, then a small amount of wastewater and oil between the piston frame and the filter plate are discharged downward through the pollution discharge frame and the through slot on the blockage frame, and the blockage of the oil on the surface of the filter plate is reduced.

Description

Technical Field

[0001] This invention relates to the field of petrochemical wastewater treatment, and more particularly to an apparatus and method for treating oily wastewater from petrochemical processes. Background Technology

[0002] The petrochemical production process generates a large amount of wastewater containing a certain amount of oil. If this untreated oily wastewater is discharged, it will have a serious impact on the ecological environment and human life. In the treatment of oily wastewater, there is a problem that oil can clog the surface of the filter element, resulting in poor filtration efficiency of subsequent filter elements. Existing oily wastewater treatment devices are not easy to clean the residual oil on the surface of the filter element, which makes it difficult to continuously treat oily wastewater, resulting in low treatment efficiency. At the same time, existing oily wastewater treatment devices also have the problem of insufficient cleaning of residual oil on the surface of the filter element, which also leads to low treatment efficiency of subsequent oily wastewater. Summary of the Invention

[0003] In order to overcome the shortcomings of existing oily wastewater treatment devices that are inconvenient to clean residual oil on the surface of filter elements and do not clean the residual oil on the surface of filter elements sufficiently, the present invention provides a device and method for treating oily wastewater in the petrochemical industry that facilitates cleaning residual oil on the surface of filter elements and can clean the residual oil on the surface of filter elements more thoroughly, thereby improving the treatment efficiency of oily wastewater.

[0004] The technical solution is as follows: A device for treating oily wastewater in petrochemical industries includes a main support, a support frame, a drain frame, a drive motor, a reciprocating assembly, a drain component, and a water inlet assembly. The support frame is fixedly connected to the upper part of the main support, and a drain frame is fixedly connected to one side of the support frame. A drain outlet is provided above the drain frame. A drain frame is fixedly connected to the lower part of one side of the support frame. A drive motor is fixedly connected to the support frame. A reciprocating assembly is provided inside the support frame. A drain component is provided on the support frame and connected to the reciprocating assembly. The drain component is used to discharge the filtered oil. A water inlet assembly is provided on the support frame and connected to the drain component. The water inlet assembly is used to introduce wastewater into the support frame.

[0005] Optionally, the reciprocating assembly includes a drive frame, a piston frame, transmission rods, a filter element, a grid plate, and a filter plate. The drive frame is rotatably connected to the support frame, and the drive frame is fixedly connected to the output shaft of the drive motor. The piston frame is slidably connected inside the support frame, and one end of two transmission rods is rotatably connected to the piston frame. The other end of one end of the two transmission rods is rotatably connected to the drive frame. The filter element is fixedly connected to one side of the support frame, and the grid plate is fixedly connected to one side of the support frame. The grid plate is located on the side of the filter element closest to the drive frame, and the filter plate is fixedly connected to the side of the grid plate closest to the drive frame.

[0006] Optionally, the sewage discharge assembly includes a transmission frame, a lever frame, a pressing frame, a push block, a telescopic spring, a wedge block, an arc plate, a blocking frame, a limiting rod, a pressing frame, and a return spring. The transmission frame is fixedly connected to the piston frame, the lever frame is fixedly connected to the lower part of the transmission frame, the pressing frame is fixedly connected to the lower part of the support frame, the push block is slidably connected to the lever frame, a telescopic spring is connected between the push block and the lever frame, the wedge block is fixedly connected to the bottom end of the push block, two arc plates are fixedly connected to the lower part of the sewage discharge frame, the two arc plates are symmetrically arranged, the blocking frame is rotatably connected to the lower part of the sewage discharge frame, the blocking frame is located between the two arc plates, the blocking frame has a through groove, two limiting rods are fixedly connected to the lower part of the sewage discharge frame, the pressing frame is slidably connected between the two limiting rods, the pressing frame has a pressing groove, two return springs are connected between the pressing frame and the sewage discharge frame, and one end of the blocking frame is located inside the pressing groove on the pressing frame.

[0007] Optionally, the water inlet assembly includes a rectangular frame, a water inlet pipe, a partition, a rotating baffle, a support plate, a lifting frame, a guide plate, and a return spring. The rectangular frame is fixedly connected to the upper part of the support frame, and the interior of the rectangular frame is connected to the interior of the support frame. The water inlet pipe is fixedly connected to the rectangular frame and is connected to the rectangular frame. The partition is fixedly connected inside the water inlet pipe, and the partition has several water passage holes. The rotating baffle is rotatably connected inside the water inlet pipe, and the rotating baffle has several water inlet holes. The partition is in contact with the rotating baffle, and the several water passage holes on the partition and the several water inlet holes on the rotating baffle are staggered. The support plate is fixedly connected to the support frame, and the lifting frame is slidably connected to the support plate. The upper part of the lifting frame has a push groove, and the lower part of the lifting frame is fixedly connected to the guide plate. A return spring connects the lifting frame and the support plate.

[0008] Optionally, it also includes an extrusion assembly for cleaning the filter plate. The extrusion assembly includes a wedge plate, a limiting block, an extruder, a helical spring, and a push rod. The extrusion assembly is located inside the support frame. A wedge plate is fixedly connected to the side of the piston frame away from the drive frame. Two limiting blocks are fixedly connected inside the support frame. The two limiting blocks are symmetrically arranged. An extruder is slidably connected between the two limiting blocks. A helical spring is connected between each of the two limiting blocks and the extruder. A push rod is fixedly connected to the extruder and contacts the wedge plate.

[0009] Optionally, it also includes a scraping assembly for cleaning the filter plate more thoroughly. The scraping assembly includes support rods and scrapers. Several support rods are fixed to the extruder, and two scrapers are fixed to each of the support rods.

[0010] Optionally, it also includes a heating frame, with the heating frame fixed to the outside of the drain frame.

[0011] A method for treating oily wastewater in a petrochemical wastewater treatment plant includes the following steps:

[0012] S1. Wastewater from the side of the filter plate away from the drive frame flows through the filter plate and enters the space between the piston frame and the filter plate. The wastewater pushes the oil on the surface of the filter plate, causing some of the oil on the surface of the filter plate to be flushed into the space between the piston frame and the filter plate. The heating frame heats the drain frame and the wastewater and oil in the drain frame.

[0013] S2. When the piston frame moves toward the drive frame, the wedge plate separates from the push rod, the helical spring rebounds and drives the extruder to move downward. The extruder squeezes the filter plate, thereby squeezing out the oil from the surface of the filter plate.

[0014] S3. The squeezing groove on the squeezing frame squeezes the blockage frame to rotate. A small amount of wastewater and oil between the piston frame and the filter plate is discharged downward through the drain frame and the through groove on the blockage frame. Then the squeezing frame rotates to reset, and the wastewater is no longer discharged downward. The scraper moves to further remove the oil on the surface of the filter plate.

[0015] S4. The drive frame continues to rotate, driving the piston frame to move away from the drive frame via the transmission rod. The piston frame moves in the opposite direction, pushing the wastewater between the piston frame and the filter plate through the filter plate, grid plate and filter element. Then the filtered wastewater is discharged through the drain port above the drain frame. When the piston frame moves away from the drive frame, the wedge plate re-presses the push rod to move upward and reset. The push rod drives the extruder to move upward and reset. The extruder extrudes the oil on the surface of the filter plate again. The scraper moves to further remove the oil on the surface of the filter plate.

[0016] This invention has the following advantages: The output shaft of the drive motor drives the drive frame to rotate. The rotation of the drive frame drives the piston frame to move closer to the drive frame via the transmission rod. The piston frame drives the transmission frame, the actuating frame, the push block, the telescopic spring, and the wedge block to move. The wedge block pushes the extrusion frame to move closer to the drive frame, increasing the space between the piston frame and the filter plate. Wastewater from the side of the filter plate away from the drive frame flows through the filter plate and enters the space between the piston frame and the filter plate. The wastewater pushes the oil on the surface of the filter plate, allowing some of the oil on the surface of the filter plate to be flushed into the space between the piston frame and the filter plate. The wedge block continues to push the extrusion frame closer to the drive frame, and the extrusion groove on the extrusion frame extrudes and blocks the oil. As the piston frame rotates, a small amount of wastewater and oil between the piston frame and the filter plate is discharged downwards through the drain frame and the groove on the plug frame. Then, the squeeze frame rotates to reset, and the wastewater stops discharging downwards. The drive frame continues to rotate, which drives the piston frame to move away from the drive frame through the transmission rod. The reverse movement of the piston frame pushes the wastewater between the piston frame and the filter plate through the filter plate, grid plate, and filter element. The filtered wastewater is then discharged through the drain port above the drain frame. This process repeats, flushing out the oil on the surface of the filter plate during wastewater filtration. This reduces oil clogging of the filter plate surface, facilitates continuous filtration of oily wastewater, and improves the filtration efficiency of oily wastewater.

[0017] When the piston frame moves towards the drive frame, the wedge plate separates from the push rod, and the helical spring rebounds, causing the extruder to move downward. The extruder squeezes the filter plate, thereby squeezing out the oil from the surface of the filter plate. When the piston frame moves away from the drive frame, the wedge plate squeezes the push rod again, causing it to move upward and reset. The push rod then causes the extruder to move upward and reset, the helical spring is compressed again, and the extruder squeezes out the oil from the surface of the filter plate again. This process repeats, which can more thoroughly remove the oil from the surface of the filter plate, thereby further improving the filtration efficiency of oily wastewater.

[0018] When the extruder moves up and down, it drives the scraper to move up and down. The up and down movement of the scraper further removes the oil from the surface of the filter plate, thereby further improving the filtration efficiency of oily wastewater. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0020] Figure 2 This is a three-dimensional structural diagram of the sewage discharge component, water inlet component, and heating frame of the present invention.

[0021] Figure 3 This is a partial cross-sectional perspective view of the reciprocating component and the sewage discharge component of the present invention.

[0022] Figure 4 This is a partial cross-sectional perspective view of the reciprocating component, extrusion component, and scraping component of the present invention.

[0023] Figure 5 This is a partial cross-sectional perspective view of the reciprocating component of the present invention.

[0024] Figure 6 For the present invention Figure 3 A magnified three-dimensional structural diagram at point A in the middle.

[0025] Figure 7 This is a partial cross-sectional perspective view of the three-dimensional structure of the sewage discharge component of the present invention.

[0026] Figure 8 This is a partial cross-sectional perspective view of the sewage discharge component and water inlet component of the present invention.

[0027] Figure 9 This is a partial cross-sectional perspective view of the three-dimensional structure of the water inlet component of the present invention.

[0028] Figure 10 This is a partial cross-sectional perspective view of the extrusion assembly and scraping assembly of the present invention.

[0029] Figure 11 This is a schematic diagram of the separate three-dimensional structure of the reciprocating component, the sewage discharge component, the extrusion component and the scraping component of the present invention.

[0030] The markings in the attached diagram are as follows: 1. Main support frame; 2. Support frame; 21. Drainage frame; 3. Sewage discharge frame; 4. Drive motor; 51. Drive frame; 52. Piston frame; 53. Transmission rod; 54. Filter element; 55. Grid plate; 56. Filter plate; 61. Transmission frame; 62. Actuating frame; 63. Extrusion frame; 64. Push block; 65. Telescopic spring; 66. Wedge block; 67. Arc plate; 68. Blocking frame; 69. Limiting rod; 610. Extrusion frame; 611. Return spring; 71. Rectangular frame; 72. Water inlet pipe; 73. Partition plate; 74. Rotating baffle; 741. Support plate; 75. Lifting frame; 76. Guide plate; 77. Return spring; 81. Wedge plate; 82. Limiting block; 83. Extrusion frame; 84. Helical spring; 85. Top rod; 91. Support rod; 92. Scraper; 10. Heating frame. Detailed Implementation

[0031] The embodiments of the present invention will be described below with reference to the accompanying drawings.

[0032] Example 1: A device for treating oily wastewater in petrochemical industries, such as... Figures 1-11 As shown, it includes a main support 1, a support frame 2, a drain frame 3, a drive motor 4, a reciprocating assembly, a drain assembly, and a water inlet assembly. The support frame 2 is fixedly connected to the upper part of the main support 1. A drain frame 21 is bolted to one side of the support frame 2. A drain outlet is provided above the drain frame 21. A blockage frame 68 is used to discharge the filtered wastewater. A drain frame 3 is fixedly connected to the lower part of one side of the support frame 2. A drive motor 4 is bolted to the support frame 2. A reciprocating assembly is provided inside the support frame 2. A drain assembly is provided on the support frame 2. The drain assembly is connected to the reciprocating assembly. The drain assembly is used to discharge the filtered oil. A water inlet assembly is provided on the support frame 2. The water inlet assembly is connected to the drain assembly. The water inlet assembly is used to introduce wastewater into the support frame 2.

[0033] The reciprocating assembly includes a drive frame 51, a piston frame 52, a transmission rod 53, a filter element 54, a grid plate 55, and a filter plate 56. The drive frame 51 is rotatably connected to the support frame 2, and the drive frame 51 is fixedly connected to the output shaft of the drive motor 4. The piston frame 52 is slidably connected inside the support frame 2 and is used to push the wastewater. One end of two transmission rods 53 is rotatably connected to the piston frame 52, and the other end of one end of the two transmission rods 53 is rotatably connected to the drive frame 51. The filter element 54 is fixedly connected inside one side of the support frame 2 and is used for secondary filtration of the wastewater. The grid plate 55 is fixedly connected inside one side of the support frame 2 and is located on the side of the filter element 54 closest to the drive frame 51. The filter plate 56 is fixedly connected on the side of the grid plate 55 closest to the drive frame 51 and is used for primary filtration of the wastewater.

[0034] The sewage discharge assembly includes a transmission frame 61, an actuating frame 62, a squeezing frame 63, a push block 64, a telescopic spring 65, a wedge block 66, an arc plate 67, a blocking frame 68, a limiting rod 69, a squeezing frame 610, and a return spring 611. The transmission frame 61 is welded onto the piston frame 52. The actuating frame 62 is fixedly connected to the lower part of the transmission frame 61. The squeezing frame 63 is fixedly connected to the lower part of the support frame 2. The push block 64 is slidably connected to the actuating frame 62. The push block 64 and the actuating frame 62 are connected by a telescopic spring 65 through a hook. The wedge block 66 is fixedly connected to the bottom end of the push block 64. Two arc plates are fixedly connected to the lower part of the sewage discharge frame 3. 67. Two arc-shaped plates 67 are symmetrically arranged. A blocking frame 68 is rotatably connected to the lower part of the sewage discharge frame 3. The blocking frame 68 is located between the two arc-shaped plates 67. The blocking frame 68 has a through groove and is used to discharge wastewater and oil. Two limiting rods 69 are fixedly connected to the lower part of the sewage discharge frame 3. A squeezing frame 610 is slidably connected between the two limiting rods 69. The squeezing frame 610 has a squeezing groove and is used to squeeze the blocking frame 68. Two return springs 611 are connected between the squeezing frame 610 and the sewage discharge frame 3. One end of the blocking frame 68 is located inside the squeezing groove on the squeezing frame 610.

[0035] The water inlet assembly includes a rectangular frame 71, a water inlet pipe 72, a baffle 73, a rotating baffle 74, a support plate 741, a lifting frame 75, a guide plate 76, and a return spring 77. A rectangular frame 71 is fixedly connected to the upper part of the support frame 2, and the interior of the rectangular frame 71 communicates with the interior of the support frame 2. A water inlet pipe 72 is connected to the rectangular frame 71 via a flange, and the water inlet pipe 72 communicates with the rectangular frame 71. A baffle 73 is fixedly connected inside the water inlet pipe 72, and the baffle 73 has several water passage holes. A rotating baffle 74 is rotatably connected inside the water inlet pipe 72, and the rotating baffle 74 has several... A water inlet hole, a partition plate 73 in contact with a rotating baffle plate 74, several water passage holes on the partition plate 73 and several water inlet holes on the rotating baffle plate 74 are staggered, the partition plate 73 and the rotating baffle plate 74 are used together to block the flow of wastewater, a support plate 741 is fixedly connected to the support frame 2, a lifting frame 75 is slidably connected to the support plate 741, a pushing groove is opened on the upper part of the lifting frame 75, the lifting frame 75 is used to push the rotating baffle plate 74, a guide plate 76 is fixedly connected to the lower part of the lifting frame 75, and a return spring 77 is connected between the lifting frame 75 and the support plate 741 through a hook.

[0036] Initially, the operator supplies oily wastewater into the inlet pipe 72. Then, the operator starts the drive motor 4, causing the output shaft of the drive motor 4 to rotate. The output shaft of the drive motor 4 drives the drive frame 51 to rotate. The rotation of the drive frame 51 drives the piston frame 52 to move closer to the drive frame 51 via the transmission rod 53. The piston frame 52 drives the transmission frame 61, the actuating frame 62, the push block 64, the telescopic spring 65, and the wedge block 66 to move. The wedge block 66 pushes the extrusion frame 610 to move closer to the drive frame 51, stretching the return spring 611. The space between the piston frame 52 and the filter plate 56 increases, and the wastewater on the side of the filter plate 56 away from the drive frame 51 flows through the filter plate 56 into the space between the piston frame 52 and the filter plate 56. The wastewater pushes the oil on the surface of the filter plate 56... The wastewater flushes some of the oil on the surface of the filter plate 56 into the space between the piston frame 52 and the filter plate 56. The piston frame 52 then drives the transmission frame 61, the actuating frame 62, the push block 64, the telescopic spring 65, and the wedge block 66 to move. The wedge block 66 continues to push the extrusion frame 610 towards the drive frame 51. The extrusion groove on the extrusion frame 610 squeezes the blocking frame 68 to rotate, causing the through groove on the blocking frame 68 to separate from the two arc-shaped plates 67. The two arc-shaped plates 67 no longer block the through groove on the blocking frame 68. A small amount of wastewater and oil between the piston frame 52 and the filter plate 56 is discharged downwards through the drain frame 3 and the through groove on the blocking frame 68. Then, the piston frame 52 continues to drive the transmission frame 61, the actuating frame 62, the push block 64, the telescopic spring 65, and the wedge block 66 to move. 5. As wedge 66 moves, the extrusion frame 63 presses the push block 64 and wedge 66 to move, the telescopic spring 65 is stretched, and then wedge 66 separates from the extrusion frame 610. The return spring 611 rebounds, causing the extrusion frame 610 to move and return to its original position. The extrusion groove on the extrusion frame 610 presses the blocking frame 68 to rotate and return to its original position. The through groove on the blocking frame 68 is blocked again by the two arc plates 67. Then, the piston frame 52 continues to drive the transmission frame 61, the actuating frame 62, the push block 64, the telescopic spring 65, and the wedge 66 to move. The actuating frame 62 pushes the guide plate 76 and the lifting frame 75 to move upward. The return spring 77 is stretched, and the upward movement of the lifting frame 75 causes the rotating baffle 74 to rotate at a certain angle. Several water inlets on the rotating baffle 74 and the baffle 73... With several water passages aligned, wastewater can enter between the piston frame 52 and the filter plate 56 through the rectangular frame 71, inlet pipe 72, partition 73, and rotating baffle 74. The piston frame 52 then drives the transmission frame 61, actuating frame 62, push block 64, telescopic spring 65, and wedge block 66 to move. The actuating frame 62 separates from the guide plate 76, and the return spring 77 rebounds, causing the lifting frame 75 and guide plate 76 to move downwards to reset. The downward movement of the guide plate 76 causes the rotating baffle 74 to rotate in the opposite direction to reset. The partition 73 and rotating baffle 74 then block the wastewater from entering through the inlet pipe 72 again. The output shaft of the drive motor 4 continues to drive the drive frame 51 to rotate. The continued rotation of the drive frame 51, via the transmission rod 53, causes the piston frame 52 to move away from the drive frame 51.The reverse movement of piston frame 52 pushes the wastewater between piston frame 52 and filter plate 56 through filter plate 56, grid plate 55 and filter element 54. The filtered wastewater is then discharged through the drain outlet above drain frame 21. When piston frame 52 moves away from drive frame 51, it drives transmission frame 61, actuating frame 62, push block 64, telescopic spring 65 and wedge block 66 to move in the opposite direction. The reverse movement of actuating frame 62 compresses guide plate 76 and lifting frame 75, causing them to move slightly downwards. The slight downward movement of lifting frame 75 causes rotating baffle 74 to rotate slightly. Rotating baffle 74 and partition 73 prevent wastewater from flowing in. The rear extrusion frame 610 extrudes the wedge block 66 and push block 64, causing them to move. The telescopic spring 65 is stretched, and the piston frame 52 moves in the opposite direction, resetting the transmission frame 61, actuating frame 62, push block 64, telescopic spring 65, and wedge block 66. The wedge block 66 separates from the extrusion frame 610, and the telescopic spring 65 rebounds, causing the push block 64 and wedge block 66 to move back to their original positions. This process repeats, flushing out oil from the surface of the filter plate 56 during wastewater filtration. This reduces oil clogging of the filter plate 56, facilitating continuous filtration of oily wastewater and improving filtration efficiency.

[0037] Example 2: Based on Example 1, such as Figure 4 , Figure 10 and Figure 11 As shown, it also includes a squeezing assembly for cleaning the filter plate 56. The squeezing assembly includes a wedge plate 81, a limiting block 82, an extruder 83, a helical spring 84, and a push rod 85. The squeezing assembly is located inside the support frame 2. The side of the piston frame 52 away from the drive frame 51 is bolted to the wedge plate 81. Two limiting blocks 82 are bolted to the support frame 2. The two limiting blocks 82 are symmetrically arranged. The extruder 83 is slidably connected between the two limiting blocks 82. The extruder 83 is used to squeeze the filter plate 56. The helical spring 84 is connected to both the two limiting blocks 82 and the extruder 83 through hooks. The push rod 85 is fixed to the extruder 83 and contacts the wedge plate 81.

[0038] Initially, the wedge plate 81 presses against the push rod 85, and the helical spring 84 is in a compressed state. When the piston frame 52 moves towards the drive frame 51, the wedge plate 81 separates from the push rod 85, and the helical spring 84 rebounds, causing the extruder 83 to move downward. The extruder 83 presses against the filter plate 56, thereby squeezing out the oil from the surface of the filter plate 56. When the piston frame 52 moves away from the drive frame 51, the wedge plate 81 presses against the push rod 85 again and moves upward to reset. The push rod 85 drives the extruder 83 to move upward to reset, and the helical spring 84 is compressed again. The extruder 83 squeezes out the oil from the surface of the filter plate 56 again. This process is repeated, which can more thoroughly remove the oil from the surface of the filter plate 56, thereby further improving the filtration efficiency of oily wastewater.

[0039] Example 3: Based on Example 2, such as Figure 4 , Figure 10 and Figure 11 As shown, it also includes a scraping assembly, which is used to clean the filter plate 56 more thoroughly. The scraping assembly includes support rods 91 and scrapers 92. Several support rods 91 are fixedly connected to the extruder 83, and two scrapers 92 are fixedly connected to each of the support rods 91. The scrapers 92 are used to scrape off the oil on the surface of the filter plate 56.

[0040] When the helical spring 84 rebounds and drives the extruder 83 to move downward, the extruder 83 will drive the support rod 91 and scraper 92 to move downward. When the top rod 85 drives the extruder 83 to move upward and reset, the extruder 83 will drive the support rod 91 and scraper 92 to move upward and reset. The up-and-down reciprocating movement of the scraper 92 will further remove the oil from the surface of the filter plate 56, thereby further improving the filtration efficiency of oily wastewater.

[0041] Example 4: Based on Example 3, such as Figure 1 , Figure 2 and Figure 11 As shown, it also includes a heating frame 10. The heating frame 10 is fixed to the outside of the drain frame 3. The heating frame 10 is used to heat the drain frame 3 and the wastewater and oil inside the drain frame 3.

[0042] When the operator starts the drive motor 4, the operator also starts the heating frame 10. The heating frame 10 heats the drain frame 3 and the wastewater and oil inside the drain frame 3, which can improve the fluidity of the oil and allow the oil in the wastewater to be discharged through the drain frame 3 more effectively.

[0043] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A device for treating oily wastewater from petrochemical plants, characterized in that, It includes a main support (1), a support frame (2), a drain frame (3), a drive motor (4), a reciprocating assembly, a drain assembly, and a water inlet assembly. The support frame (2) is fixed to the upper part of the main support (1), and a drain frame (21) is fixed to one side of the support frame (2). A drain outlet is provided above the drain frame (21). A drain frame (3) is fixed to the lower part of one side of the support frame (2). A drive motor (4) is fixed to the support frame (2). A reciprocating assembly is provided inside the support frame (2). A drain assembly is provided on the support frame (2). The drain assembly is connected to the reciprocating assembly. The drain assembly is used to discharge the filtered oil. A water inlet assembly is provided on the support frame (2). The water inlet assembly is connected to the drain assembly. The water inlet assembly is used to introduce wastewater into the support frame (2). The reciprocating assembly includes a drive frame (51), a piston frame (52), a transmission rod (53), a filter element (54), a grid plate (55), and a filter plate (56). The drive frame (51) is rotatably connected to the support frame (2), and the drive frame (51) is fixedly connected to the output shaft of the drive motor (4). The piston frame (52) is slidably connected inside the support frame (2), and one end of two transmission rods (53) is rotatably connected to the piston frame (52). The other end of the two transmission rods (53) is rotatably connected to the drive frame (51). The filter element (54) is fixedly connected inside one side of the support frame (2), and the grid plate (55) is fixedly connected inside one side of the support frame (2). The grid plate (55) is located on the side of the filter element (54) closer to the drive frame (51), and the filter plate (56) is fixedly connected on the side of the grid plate (55) closer to the drive frame (51). The sewage discharge assembly includes a transmission frame (61), a lever frame (62), a squeezing frame (63), a push block (64), a telescopic spring (65), a wedge block (66), an arc plate (67), a blocking frame (68), a limit rod (69), a squeezing frame (610), and a return spring (611). The transmission frame (61) is fixedly connected to the piston frame (52). The lever frame (62) is fixedly connected to the lower part of the transmission frame (61). The squeezing frame (63) is fixedly connected to the lower part of the support frame (2). The push block (64) is slidably connected to the lever frame (62). A telescopic spring (65) is connected between the push block (64) and the lever frame (62). A wedge block is fixedly connected to the bottom end of the push block (64). Block (66), two arc-shaped plates (67) are fixedly connected to the lower part of the sewage frame (3). The two arc-shaped plates (67) are symmetrically arranged. A blocking frame (68) is rotatably connected to the lower part of the sewage frame (3). The blocking frame (68) is located between the two arc-shaped plates (67). A through groove is opened on the blocking frame (68). Two limiting rods (69) are fixedly connected to the lower part of the sewage frame (3). A squeezing frame (610) is slidably connected between the two limiting rods (69). A squeezing groove is opened on the squeezing frame (610). Two return springs (611) are connected between the squeezing frame (610) and the sewage frame (3). One end of the blocking frame (68) is located in the squeezing groove on the squeezing frame (610).

2. The device for treating oily wastewater in petrochemical industries according to claim 1, characterized in that, The water inlet assembly includes a rectangular frame (71), a water inlet pipe (72), a partition (73), a rotating baffle (74), a support plate (741), a lifting frame (75), a guide plate (76), and a return spring (77). The rectangular frame (71) is fixedly connected to the upper part of the support frame (2). The interior of the rectangular frame (71) is connected to the interior of the support frame (2). The water inlet pipe (72) is fixedly connected to the rectangular frame (71). The water inlet pipe (72) is connected to the rectangular frame (71). The partition (73) is fixedly connected inside the water inlet pipe (72). Several water passage holes are opened on the partition (73). The rotating baffle (74) is connected to the water inlet pipe (72). A rotating baffle (74) is connected in a movable manner. Several water inlets are opened on the rotating baffle (74). A partition (73) is in contact with the rotating baffle (74). Several water passages on the partition (73) and several water inlets on the rotating baffle (74) are staggered. A support plate (741) is fixedly connected to the support frame (2). A lifting frame (75) is slidably connected to the support plate (741). A pushing groove is opened on the upper part of the lifting frame (75). A guide plate (76) is fixedly connected to the lower part of the lifting frame (75). A return spring (77) is connected between the lifting frame (75) and the support plate (741).

3. The device for treating oily wastewater in petrochemical industries according to claim 2, characterized in that, It also includes an extrusion assembly for cleaning the filter plate (56). The extrusion assembly includes a wedge plate (81), a limiting block (82), an extruder (83), a helical spring (84), and a push rod (85). The extrusion assembly is provided in the support frame (2). The wedge plate (81) is fixedly connected to the side of the piston frame (52) away from the drive frame (51). Two limiting blocks (82) are fixedly connected in the support frame (2). The two limiting blocks (82) are symmetrically arranged. The extruder (83) is slidably connected between the two limiting blocks (82). A helical spring (84) is connected between the two limiting blocks (82) and the extruder (83). A push rod (85) is fixedly connected to the extruder (83). The push rod (85) is in contact with the wedge plate (81).

4. The device for treating oily wastewater in petrochemical industries according to claim 3, characterized in that, It also includes a scraping assembly for cleaning the filter plate (56) more thoroughly. The scraping assembly includes support rods (91) and scrapers (92). Several support rods (91) are fixed to the extruder (83), and two scrapers (92) are fixed to each of the support rods (91).

5. A device for treating oily wastewater in petrochemical industries according to claim 4, characterized in that, It also includes a heating frame (10), and the outside of the drain frame (3) is fixed with a heating frame (10).

6. The treatment method for oily wastewater in a petrochemical treatment device according to claim 5, characterized in that, Includes the following steps: S1. Wastewater from the side of the filter plate (56) away from the drive frame (51) flows through the filter plate (56) and enters the space between the piston frame (52) and the filter plate (56). The wastewater pushes the oil on the surface of the filter plate (56), causing the wastewater to flush some of the oil on the surface of the filter plate (56) into the space between the piston frame (52) and the filter plate (56). The heating frame (10) heats the drain frame (3) and the wastewater and oil in the drain frame (3). S2. When the piston frame (52) moves toward the drive frame (51), the wedge plate (81) separates from the push rod (85), and the coil spring (84) rebounds, causing the extruder (83) to move downward. The extruder (83) squeezes the filter plate (56) to squeeze out the oil on the surface of the filter plate (56). S3. The squeezing groove on the squeezing frame (610) squeezes the blockage frame (68) to rotate. A small amount of wastewater and oil between the piston frame (52) and the filter plate (56) is discharged downward through the drain frame (3) and the through groove on the blockage frame (68). Then the squeezing frame (610) rotates to reset, and the wastewater is no longer discharged downward. The scraper (92) moves to further remove the oil on the surface of the filter plate (56). S4. The drive frame (51) continues to rotate and drives the piston frame (52) to move away from the drive frame (51) through the transmission rod (53). The piston frame (52) moves in the opposite direction and pushes the wastewater between the piston frame (52) and the filter plate (56) to flow through the filter plate (56), the grid plate (55) and the filter element (54). Then the filtered wastewater is discharged through the drain port above the drain frame (21). When the piston frame (52) moves away from the drive frame (51), the wedge plate (81) re-presses the top rod (85) to move upward and reset. The top rod (85) drives the extruder (83) to move upward and reset. The extruder (83) squeezes the oil on the surface of the filter plate (56) again. The scraper (92) moves upward to further remove the oil on the surface of the filter plate (56).

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