A biochemical treatment device and method for high-salt gas field produced water MVR distillation water

Abstract

This invention discloses a biochemical treatment device and method for producing water from high-salinity gas fields via MVR distillation. The device includes a base, a biochemical tank at the top of the base, a support frame on the side of the base, and a collection mechanism below the support frame that automatically detects and collects excess sludge. A sealing mechanism is installed on the side wall of the biochemical tank, and a filter plate is installed inside the tank. This invention, through the configuration of a drive motor, an electric telescopic rod, a fan-shaped collection chamber, a first trapezoidal block, a contact rod, a reciprocating switch, and a second trapezoidal block, achieves automatic cleaning when the sludge reaches half the capacity of the biochemical tank, preventing a reduction in tank volume from affecting biochemical treatment efficiency. Furthermore, the adjustment mechanism gradually increases aeration as aerobic bacteria multiply, ensuring sufficient oxygen for nitrification and maintaining the wastewater treatment efficiency of the biochemical tank. This adaptive adjustment requires no manual intervention and is convenient and quick.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, specifically to a biochemical treatment device and method for producing MVR distilled water from high-salinity gas fields. Background Technology

[0002] Produced water from high-salinity gas fields often contains high levels of salt. When treating high-salinity wastewater, the effectiveness of traditional treatment methods may be limited due to the inhibitory effect of salt on microorganisms. Therefore, it may be necessary to combine other treatment methods, such as MVR (Medium-Vacuum Reduction) evaporation technology, to achieve better treatment results. Generally, MVR distillation technology is first used to concentrate and remove salt from the wastewater, followed by biological treatment methods to remove residual organic matter and other pollutants, ensuring that the treated wastewater meets relevant standards and requirements.

[0003] In biological treatment, sludge needs to be cleaned regularly, generally once the sludge reaches half the volume of the biological treatment tank. However, as the biological treatment progresses, the corresponding microorganisms continue to multiply, and the rate of sludge production increases. Consequently, the sludge cleaning cycle needs to be shortened. Failure to clean the sludge in a timely manner will lead to a reduction in the volume of the biological treatment tank and may also cause clogging of the filtration device, affecting the progress of effluent biological treatment. Furthermore, as the number of microorganisms increases, dissolved oxygen needs to increase simultaneously. Otherwise, insufficient dissolved oxygen will reduce the activity of aerobic microorganisms, thereby reducing the degradation efficiency of organic matter and directly affecting the wastewater treatment effect. Summary of the Invention

[0004] The present invention addresses the problem that existing technical solutions are too simplistic and provides a solution that is significantly different from existing technologies. Specifically, the purpose of the present invention is to provide a biochemical treatment device and method for producing water from high-salinity gas fields through MVR distillation to solve the problems mentioned in the background.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a biochemical treatment device for MVR distilled water produced from high-salinity gas fields, comprising a base, a biochemical tank at the top of the base, a support frame on the side of the base, a collection mechanism for automatically detecting and collecting excess sludge below the support frame, a sealing mechanism on the side wall of the biochemical tank, a filter plate inside the biochemical tank, two wedge-shaped blocks fixedly mounted on the top of the filter plate, an aeration tube array fixedly mounted inside the base, a plurality of output pipes fixedly mounted on the top of the aeration tube array, and an aeration head fixedly mounted on the top of each of the output pipes. An air inlet pipe is fixedly installed on the side wall of the base. One end of the air inlet pipe is connected to the aeration tube array, and the other end of the air inlet pipe is fixedly installed with a blower. The side wall of the biological tank is provided with an adjustment mechanism for adjusting the aeration volume. The adjustment mechanism includes an adjustment component, two adjustment discs, two circular grooves, and four fan-shaped grooves. The adjustment component is installed on the outer side wall of the biological tank. One of the adjustment discs is fixedly installed inside the air inlet pipe, and the other adjustment disc is fixedly installed inside the adjustment component. The two circular grooves are respectively located at the center of the two adjustment discs. The four adjustment discs are arranged in a staggered circular array on the two adjustment discs.

[0006] Preferably, the adjustment assembly includes a limiting post, an annular groove, a mounting plate, an adjusting rack, a connecting shaft, an adjusting gear, a missing gear, and a gear ring. The adjustment assembly is disposed inside the main pipeline. The mounting plate is fixedly disposed on the side wall of the biochemical tank. The annular groove is disposed on the mounting plate. One end of the limiting post is slidably disposed inside the annular groove. The adjusting rack is fixedly disposed on the other end of the limiting post. The connecting shaft is rotatably disposed on the side wall of the biochemical tank. The adjusting gear and the missing gear are both fixedly disposed on the connecting shaft. A cut-off groove is provided in the middle of the air inlet pipe. The gear ring is rotatably disposed in the cut-off groove. One of the adjusting discs is fixedly connected to the gear ring.

[0007] Preferably, sealing ring grooves are provided on both sides of the toothed ring.

[0008] Preferably, each sealing mechanism includes two sealing plates, a U-shaped plate, two slots, two sealing springs, and two base plates. The two slots are disposed inside the side wall of the biochemical tank, the two sealing plates are fixedly disposed on the side wall of the filter plate, and the two sealing plates slide within the two slots respectively. The two ends of the U-shaped plate are fixedly disposed on the two sealing plates respectively. The two base plates are fixedly disposed on the side wall of the biochemical tank, and the two sealing springs are fixedly disposed between the corresponding base plates and the U-shaped plates respectively. The adjusting rack is in a limiting sliding engagement with the U-shaped plate.

[0009] Preferably, the collection mechanism includes a drive motor, an electric telescopic rod, a fan-shaped collection chamber, a first trapezoidal block, a contact rod, a reciprocating switch, and a second trapezoidal block. The side wall of the biochemical tank has an internal receiving groove. Both the second and first trapezoidal blocks are slidably disposed within the receiving groove. The reciprocating switch is fixedly disposed at the top of the receiving groove. The contact rod is fixedly disposed at the top of the first trapezoidal block. The drive motor is fixedly disposed on a support frame. The electric telescopic rod is fixedly disposed at the end of the drive motor's output shaft. The fan-shaped collection chamber is fixedly disposed at the end of the electric telescopic rod. The reciprocating switch is electrically connected to the electric telescopic rod.

[0010] Preferably, the bottom of the fan-shaped collection bin is provided with an inclined surface, which abuts against the wedge-shaped block.

[0011] A biochemical treatment device for produced water (MVR) distilled water from high-salinity gas fields, the treatment method comprising:

[0012] S1: First, the high-salt gas field extract water inside the biological treatment tank is distilled with MVR to remove salt. Then, the HP value of the wastewater is adjusted and nitrifying bacteria are added. Oxygen is then aerated in the biological treatment tank by a blower along the air inlet pipe, aeration pipe array and outlet pipe.

[0013] S2: Then, with the reproduction of nitrifying bacteria and the nitrification reaction, more and more flocculent sludge is produced inside the biological treatment tank. The flocculent sludge moves the filter plate downward under the action of gravity.

[0014] S3: The downward movement of the filter plate drives the sealing mechanism to work, and the working of the sealing mechanism drives the adjustment mechanism to work, adjusting the aeration rate until the filter plate moves to the bottom of the biological tank.

[0015] S4: The filter plate triggers the collection mechanism to collect the sludge inside the biological treatment tank. When the collection mechanism is working, it abuts against the wedge block, causing the filter plate to quickly move down a short distance inside the biological treatment tank and then reset. This, along with the wastewater inside the biological treatment tank, helps to clear the filter plate.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] (1) By setting up a drive motor, an electric telescopic rod, a fan-shaped collection bin, a first trapezoidal block, a contact rod, a reciprocating switch and a second trapezoidal block, the present invention realizes that when the sludge reaches half of the biological treatment tank, it will automatically clean it, thus avoiding the reduction of the volume of the biological treatment tank and affecting the efficiency of biological treatment. Furthermore, by setting up an adjustment mechanism, it also realizes that as the aerobic bacteria multiply, the aeration volume will gradually increase, ensuring that the aerobic bacteria have enough oxygen for nitrification reaction, thus ensuring the sewage treatment efficiency of the biological treatment tank. It is self-adaptive and does not require manual intervention, making it convenient and quick.

[0018] (2) The present invention achieves the sealing of the biological tank when the filter plate moves down under the gravity of the sludge by setting up a sealing plate, a U-shaped plate, two slots, two sealing springs and two bottom plates, and can drive the filter plate to automatically reset after the sludge is collected.

[0019] (3) By setting the inclined plane and wedge block, the present invention realizes that when the fan-shaped collection bin collects sludge, some sludge will be squeezed into the filter holes of the filter plate. The filter plate moves down quickly to clear the filter holes of the filter plate and ensure the filtration effect of the filter plate. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 This is a cross-sectional structural diagram of the present invention;

[0022] Figure 3 This is a cross-sectional view of the adjustment mechanism of the present invention;

[0023] Figure 4 This is an exploded view of part of the adjusting mechanism structure of the present invention;

[0024] Figure 5 This is a schematic diagram of the collection mechanism structure of the present invention;

[0025] Figure 6 for Figure 5 Enlarged view of point A in the middle.

[0026] In the diagram: 1. Base; 2. Biochemical tank; 3. Collection mechanism; 31. Drive motor; 32. Electric telescopic rod; 33. Fan-shaped collection chamber; 34. First trapezoidal block; 35. Abutment rod; 36. Reciprocating switch; 37. Second trapezoidal block; 4. Sealing mechanism; 41. Sealing plate; 42. U-shaped plate; 43. Slot; 44. Sealing spring; 45. Base plate; 5. Adjustment mechanism; 51. Limiting post; 52. Annular groove; 53. Mounting plate; 54. Adjusting rack; 55. Connecting shaft; 56. Adjusting gear; 57. Missing gear; 58. Adjusting disc; 59. Gear ring; 591. Sealing ring groove; 510. Circular groove; 511. Fan-shaped groove; 6. Aeration tube array; 7. Air inlet pipe; 8. Blower; 9. Support frame; 10. Wedge block; 11. Output pipe; 12. Aeration head; 13. Filter plate. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] Please see Figures 1-6 An embodiment of the present invention provides a biochemical treatment device for MVR distilled water produced from high-salinity gas fields, comprising a base 1, a biochemical tank 2 disposed on top of the base 1, a support frame 9 disposed on the side of the base 1, a collection mechanism 3 for automatically detecting and collecting excess sludge disposed below the support frame 9, a sealing mechanism 4 disposed on the side wall of the biochemical tank 2, a filter plate 13 disposed inside the biochemical tank 2, two wedge-shaped blocks 10 fixedly disposed on the top of the filter plate 13, an aeration tube array 6 fixedly disposed inside the base 1, a plurality of output pipes 11 fixedly disposed on the top of the aeration tube array 6, and an aeration head 12 fixedly disposed on the top of each of the plurality of output pipes 11, the side wall of the base 1 being fixedly... An air inlet pipe 7 is provided, one end of which is connected to the aeration pipe array 6, and the other end of which is fixedly provided with a blower 8. The side wall of the biological tank 2 is provided with an adjustment mechanism 5 for adjusting the aeration volume. The adjustment mechanism 5 includes an adjustment component, two adjustment discs 58, two circular grooves 510, and four fan-shaped grooves 511. The adjustment component is provided on the outer side wall of the biological tank 2. One of the adjustment discs 58 is fixedly provided inside the air inlet pipe 7, and the other adjustment disc 58 is fixedly provided inside the adjustment component. The two circular grooves 510 are respectively provided at the center of the two adjustment discs 58. The four adjustment discs 58 are respectively arranged in a circular array and staggered on the two adjustment discs 58.

[0029] Specifically, the adjustment assembly includes a limiting post 51, an annular groove 52, a mounting plate 53, an adjusting rack 54, a connecting shaft 55, an adjusting gear 56, a missing gear 57, and a gear ring 59. The adjustment assembly is disposed inside the main pipe. The mounting plate 53 is fixedly disposed on the side wall of the biochemical tank 2. The annular groove 52 is disposed on the mounting plate 53. One end of the limiting post 51 is slidably disposed inside the annular groove 52. The adjusting rack 54 is fixedly disposed on the other end of the limiting post 51. The connecting shaft 55 is rotatably disposed on the side wall of the biochemical tank 2. The adjusting gear 56 and the missing gear 57 are both fixedly disposed on the connecting shaft 55. A cut-off groove is provided in the middle of the air inlet pipe 7. The gear ring 59 is rotatably disposed in the cut-off groove. One of the adjusting discs 58 is fixedly connected to the gear ring 59. The U-shaped plate 42 moves downward to compress the sealing spring 44, which in turn causes the adjusting rack 54 to move downward. The adjusting rack 54 then moves downward, causing the limiting post 51 to move synchronously. The limiting post 51 slides inside the annular groove 52. The synchronous downward movement of the adjusting rack 54 causes the adjusting gear 56, the connecting shaft 55, and the missing gear 57 to rotate synchronously. The rotation of the missing gear 57 causes the gear ring 59 to rotate, which in turn causes the corresponding adjusting disc 58 to rotate. This causes the sector groove 511 to gradually align from a completely misaligned state, resulting in a gradual increase in aeration. This allows for a gradual increase in aeration as aerobic bacteria multiply, ensuring that aerobic bacteria have sufficient oxygen for nitrification and maintaining the wastewater treatment efficiency of the biological treatment tank 2. The system is self-adaptive, requires no manual intervention, and is convenient and quick to implement.

[0030] Specifically, sealing ring grooves 591 are provided on both sides of the toothed ring 59. The sealing ring grooves 591 ensure the air inlet pipe 7 is sealed when adjusting the aeration rate.

[0031] Specifically, each sealing mechanism 4 includes two sealing plates 41, a U-shaped plate 42, two slots 43, two sealing springs 44, and two base plates 45. The two slots 43 are located inside the side wall of the biological treatment tank 2. The two sealing plates 41 are fixedly installed on the side wall of the filter plate 13, and slide within the two slots 43 respectively. The U-shaped plate 42 is fixedly installed on the two sealing plates 41 at both ends. The two base plates 45 are fixedly installed on the side wall of the biological treatment tank 2. The two sealing springs 44 are fixedly installed between the corresponding base plates 45 and the U-shaped plates 42. The adjusting rack 54 is in sliding limit engagement with the U-shaped plate 42. The downward movement of the filter plate 13 causes the U-shaped plate 42 to move downward, compressing the sealing springs 44. This ensures the sealing of the biological treatment tank 2 even when the filter plate 13 is subjected to the gravity of the sludge.

[0032] Specifically, the collection mechanism 3 includes a drive motor 31, an electric telescopic rod 32, a fan-shaped collection chamber 33, a first trapezoidal block 34, a contact rod 35, a reciprocating switch 36, and a second trapezoidal block 37. The side wall of the biochemical pool 2 is provided with a receiving groove. The second trapezoidal block 37 and the first trapezoidal block 34 are both slidably disposed inside the receiving groove. The reciprocating switch 36 is fixedly disposed at the top of the receiving groove. The contact rod 35 is fixedly disposed at the top of the first trapezoidal block 34. The drive motor 31 is fixedly disposed on the support frame 9. The electric telescopic rod 32 is fixedly disposed at the end of the output shaft of the drive motor 31. The fan-shaped collection chamber 33 is fixedly disposed at the end of the electric telescopic rod 32. The reciprocating switch 36 is electrically connected to the electric telescopic rod 32. The filter plate 13 moves downwards and abuts against the second trapezoidal block 37, which in turn moves against the first trapezoidal block 34, causing it to move upwards. Simultaneously, the abutment rod 35 moves upwards, abutting against the reciprocating switch 36. The reciprocating switch 36 opens, causing the output shaft of the electric telescopic rod 32 to extend, which in turn moves the fan-shaped collection chamber 33 downwards. Simultaneously, the output shaft of the drive motor 31 drives the electric telescopic rod 32 and the fan-shaped collection chamber 33 to rotate synchronously, collecting sludge. This achieves automatic cleaning when the sludge reaches half of the biological treatment tank 2, preventing the volume of the biological treatment tank 2 from decreasing and affecting the efficiency of biological treatment.

[0033] Specifically, the bottom of the fan-shaped collection chamber 33 is provided with an inclined surface, which abuts against the wedge block 10. The fan-shaped collection chamber 33 is rotated by the drive motor 31, so that the inclined surface abuts against the wedge block 10. The wedge block 10 is abutted and causes the filter plate 13 to move down a short distance quickly, and then is reset by the elastic force of the sealing spring 44. This achieves that when the fan-shaped collection chamber 33 collects sludge, some sludge is squeezed into the filter holes of the filter plate 13. The rapid downward movement of the filter plate 13 clears the filter holes of the filter plate 13, ensuring the filtration effect of the filter plate 13.

[0034] A biochemical treatment device for produced water (MVR) distilled water from high-salinity gas fields, the treatment method comprising:

[0035] S1: First, the high-salt gas field water extracted from the biological tank 2 is desalinated by MVR distillation. Then, the HP value of the wastewater is adjusted and nitrifying bacteria are added. Oxygen is aerated in the biological tank 2 by the blower 8 along the air inlet pipe 7, the aeration pipe array 6 and the outlet pipe 11, and finally output from the aeration head 12.

[0036] S2: Then, with the reproduction of nitrifying bacteria and the nitrification reaction, more and more flocculent sludge is generated inside the biological tank 2. The flocculent sludge drives the filter plate 13 to move downward under the action of gravity.

[0037] S3: The filter plate 13 moves down, which drives the sealing mechanism 4 to work. The working of the sealing mechanism 4 drives the adjusting mechanism 5 to work, adjusting the aeration rate until the filter plate 13 moves to the bottom of the biological tank 2.

[0038] S4: The filter plate 13 triggers the collection mechanism 3 to collect the sludge inside the biological tank 2. When the collection mechanism 3 is working, it abuts against the wedge block 10, causing the filter plate 13 to quickly move down a short distance inside the biological tank 2 and then reset. Together with the wastewater inside the biological tank 2, the filter plate 13 is cleared.

[0039] Working principle: First, the high-salinity gas field extract water inside biological treatment tank 2 is treated with MVR distillation to remove salt. Then, the HP value of the wastewater is adjusted, and nitrifying bacteria are added. Oxygen is transported through the blower 8 along the air inlet pipe 7, aeration tube array 6, and outlet pipe 11, and finally output from the aeration head 12 to aerate biological treatment tank 2. Then, with the reproduction of nitrifying bacteria and the nitrification reaction, more and more flocculent sludge is generated inside biological treatment tank 2. The flocculent sludge moves the filter plate 13 downward under the action of gravity. The downward movement of the filter plate 13 moves the U-shaped plate 42 downward, which compresses the sealing spring 44. The downward movement of the U-shaped plate 42 moves the adjusting rack 54 downward, which moves the limiting column 51 synchronously. The limiting column 51 slides inside the annular groove 52. The synchronous downward movement of the adjusting rack 54 moves the adjusting gear 56, the connecting shaft 55, and the missing gear 57 synchronously. The rotation of the missing gear 57 drives the gear ring 59 to rotate. The rotation drives the corresponding adjusting disc 58 to rotate, thereby gradually aligning the sector groove 511 from a completely misaligned state, thus gradually increasing the aeration volume and adjusting the aeration volume. Under the action of the annular groove 52, the adjusting rack 54 disengages from the adjusting gear 56 when it resets, preventing the aeration volume from being reset. The filter plate 13 moves downward and touches the second trapezoidal block 37, which in turn touches the first trapezoidal block 34 and moves upward, simultaneously driving the contact rod 35 to move upward. The contact rod 35 then touches the reciprocating switch 36, opening the reciprocating switch 36 and causing the output shaft of the electric telescopic rod 32 to extend, driving the sector collection chamber 33 to move downward. Simultaneously, the output shaft of the drive motor 31 drives the electric telescopic rod 32 and the sector collection chamber 33 to rotate synchronously, collecting sludge. When the collection mechanism 3 is working, it touches the wedge block 10, causing the filter plate 13 to quickly move downward a short distance inside the biological treatment tank 2 and then reset, thus clearing the filter plate 13 in conjunction with the wastewater inside the biological treatment tank 2.

[0040] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. 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 biochemical treatment device for MVR distillation of high-salinity gas field produced water, comprising a base (1), a top of the base (1) being provided with a biochemical tank (2), a side of the base (1) being provided with a support frame (9), characterized in that: The support frame (9) is provided with a collection mechanism (3) for automatically judging excess sludge and collecting, the side wall of the biochemical tank (2) is provided with a sealing mechanism (4), the inside of the biochemical tank (2) is provided with a filter plate (13), the top of the filter plate (13) is fixedly provided with two wedge blocks (10), the inside of the base (1) is fixedly provided with an aeration pipe array (6), the top of the aeration pipe array (6) is fixedly provided with a plurality of output pipes (11), the top of each of the output pipes (11) is fixedly provided with an aeration head (12), the side wall of the base (1) is fixedly provided with an air inlet pipe (7), one end of the air inlet pipe (7) is communicated with the aeration pipe array (6), the other end of the air inlet pipe (7) is fixedly provided with a fan (8), the side wall of the biochemical tank (2) is provided with an adjusting mechanism (5) for adjusting the aeration amount, the adjusting mechanism (5) comprises an adjusting assembly, two adjusting discs (58), two circular grooves (510) and four fan-shaped grooves (511), the adjusting assembly is arranged on the outer side wall of the biochemical tank (2), one of the adjusting discs (58) is fixedly arranged in the air inlet pipe (7), the other adjusting disc (58) is fixedly arranged in the adjusting assembly, the two circular grooves (510) are respectively arranged at the centers of the two adjusting discs (58), and the four adjusting discs (58) are arranged in a circular array in a staggered manner on the two adjusting discs (58).

2. The biochemical treatment device for MVR distillation of high-salinity produced water according to claim 1, characterized in that: The adjusting assembly comprises a limiting column (51), an annular groove (52), a mounting plate (53), an adjusting rack (54), a connecting shaft (55), an adjusting gear (56), a toothless gear (57) and a tooth ring (59), the adjusting assembly is arranged in the main pipeline, the mounting plate (53) is fixedly arranged on the side wall of the biochemical tank (2), the annular groove (52) is arranged on the mounting plate (53), one end of the limiting column (51) is slidably arranged in the annular groove (52), the adjusting rack (54) is fixedly arranged at the other end of the limiting column (51), the connecting shaft (55) is rotatably arranged on the side wall of the biochemical tank (2), the adjusting gear (56) and the toothless gear (57) are fixedly arranged on the connecting shaft (55), the air inlet pipe (7) is provided with a cutting groove in the middle, and the tooth ring (59) is rotatably arranged in the cutting groove, and one of the adjusting discs (58) is fixedly connected with the tooth ring (59).

3. The biochemical treatment device for MVR distillation of high-salinity produced water according to claim 2, characterized in that: The tooth ring (59) is provided with a sealing ring groove (591) on both sides.

4. The biochemical treatment device for MVR distillation of high-salinity produced water according to claim 2, characterized in that: Each sealing mechanism (4) includes two sealing plates (41), a U-shaped plate (42), two slots (43), two sealing springs (44), and two base plates (45). The two slots (43) are located inside the side wall of the biochemical tank (2). The two sealing plates (41) are fixedly located on the side wall of the filter plate (13), and the two sealing plates (41) slide in the two slots (43) respectively. The two ends of the U-shaped plate (42) are fixedly located on the two sealing plates (41) respectively. The two base plates (45) are fixedly located on the side wall of the biochemical tank (2). The two sealing springs (44) are fixedly located between the corresponding base plates (45) and the U-shaped plate (42) respectively. The adjusting rack (54) is in a limiting sliding cooperation with the U-shaped plate (42).

5. The biochemical treatment device for MVR distillation of high-salinity produced water according to claim 4, characterized in that: The collection mechanism (3) includes a drive motor (31), an electric telescopic rod (32), a fan-shaped collection chamber (33), a first trapezoidal block (34), a contact rod (35), a reciprocating switch (36), and a second trapezoidal block (37). The side wall of the biochemical pool (2) is provided with a receiving groove. The second trapezoidal block (37) and the first trapezoidal block (34) are both slidably disposed inside the receiving groove. The reciprocating switch (36) is fixedly disposed at the top of the receiving groove. The contact rod (35) is fixedly disposed at the top of the first trapezoidal block (34). The drive motor (31) is fixedly disposed on the support frame (9). The electric telescopic rod (32) is fixedly disposed at the end of the output shaft of the drive motor (31). The fan-shaped collection chamber (33) is fixedly disposed at the end of the electric telescopic rod (32). The reciprocating switch (36) is electrically connected to the electric telescopic rod (32).

6. The biochemical treatment device for MVR distillation of high-salinity produced water according to claim 5, characterized in that: The bottom of the fan-shaped collection bin (33) is provided with an inclined surface, which abuts against the wedge block (10).

7. The biochemical treatment device for MVR distillation of high-salinity produced water according to any one of claims 1-7, characterized in that, The processing methods include: S1: First, the high-salt gas field extract water inside the biological tank (2) is desalinated by MVR distillation water. Then, the HP value of the wastewater is adjusted and nitrifying bacteria are added. Oxygen is sent through the air inlet pipe (7), aeration pipe array (6) and output pipe (11) by the blower (8) and finally output from the aeration head (12) to aerate the biological tank (2). S2: Then, with the reproduction of nitrifying bacteria and the nitrification reaction, more and more flocculent sludge is generated inside the biological tank (2), and the flocculent sludge drives the filter plate (13) to move down under the action of gravity; S3: The filter plate (13) moves down to drive the sealing mechanism (4) to work, and the sealing mechanism (4) drives the adjustment mechanism (5) to work, adjusting the aeration rate until the filter plate (13) moves to the bottom of the biological tank (2); S4: The filter plate (13) triggers the collection mechanism (3) to collect the sludge inside the biological tank (2). When the collection mechanism (3) is working, it abuts against the wedge block (10), causing the filter plate (13) to quickly move down a short distance inside the biological tank (2) and then reset. In conjunction with the wastewater inside the biological tank (2), the filter plate (13) is cleared.

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