Oilfield water injection water treatment cyclone pollution collection gradient filtering device

Abstract

The utility model discloses oilfield water injection water treatment cyclone dirt collecting gradient filter device, including first filter box and dirt collecting hopper, the lateral wall of first filter box is connected with inlet pipe, and the top of first filter box box body is connected with sludge pump through first support plate, and sludge pump extends to dirt collecting hopper in through suction pipe, and the lateral wall of first filter box is equipped with sludge tank, and the top of sludge pump is connected with blow-off pipe, and the discharge port of blow-off pipe is connected into sludge tank, the lateral wall of dirt collecting hopper is fixed with baffle, and the other side of baffle is equipped with chemical feeding tank, and chemical feeding tank is connected with third filter box and second filter box in proper order. The utility model discloses oilfield water injection water treatment cyclone dirt collecting gradient filter device, solved the problem of heavy blockage cleaning not thoroughly when the filter screen flushing assembly of prior art washes.

Description

Technical Field

[0001] This utility model belongs to the technical field of oilfield water injection treatment devices, specifically relating to an oilfield water injection treatment vortex sludge collection gradient filtration device. Background Technology

[0002] Oilfield water injection is the process of injecting water that meets quality standards from injection wells into the oil reservoir using injection equipment to maintain reservoir pressure. The quality of this water directly affects the recovery rate and equipment lifespan. Since the injected water source often comes from the recycled water after oil-water separation, it is rich in oil and suspended particles, requiring filtration for oil removal. Current technologies commonly use oil-water separators for oil removal, but this approach has the following problems in practical applications: 1. Limited oil removal efficiency: For example, patent number CN219950591U discloses a cyclone gradient filtration device for oilfield water injection treatment. This device uses an oil suction mechanism with suction nozzles that contact the oil layer to absorb the oil. The suction pump method can quickly remove the oil layer, improving upon the traditional method of natural oil drainage with outlets, which suffers from slow discharge speed and thick oil layers affecting fluidity. However, during use, the device lacks filtration and treatment of silt and impurities in the reinjection water, resulting in reduced purity of the reinjection water. Furthermore, long-term use may lead to filter clogging, requiring manual cleaning and reducing work efficiency. 2. System response lag: For example, patent number CN222205003U discloses a cyclone gradient filtration device for oilfield injection water treatment. By adding a sludge collection device and flushing components, it solves the problems of filtration and treatment of silt and impurities in the reinjection water and easy filter clogging. However, the entire system relies on timed or manual operation and cannot be dynamically adjusted according to real-time operating conditions such as oil layer thickness and turbidity, resulting in incomplete and untimely treatment. 3. Insufficient flushing efficiency: Existing filter flushing components use constant water pressure, which is insufficient to cope with different degrees of filter clogging. Light clogging wastes water resources, while heavy clogging results in incomplete cleaning, affecting the normal operation of the system. Utility Model Content

[0003] The purpose of this invention is to provide a cyclone sludge collection gradient filtration device for oilfield water injection treatment, which solves the problem of incomplete cleaning and heavy clogging during the rinsing of the filter screen washing components in the prior art.

[0004] The technical solution adopted by this utility model is a cyclone sludge collection gradient filtration device for oilfield injection water treatment, including a first filter box and a sludge collection hopper. The side wall of the first filter box is connected to an inlet pipe. The top of the first filter box is connected to a sludge pump through a first support plate. The sludge pump extends into the sludge collection hopper through a suction pipe. A sludge tank is provided on the side wall of the first filter box. A drain pipe is connected to the top of the sludge pump. The outlet of the drain pipe is connected to the sludge tank. A baffle is fixed on the side wall of the sludge collection hopper. A chemical feeding box is provided on the other side of the baffle. The chemical feeding box is connected to a third filter box and a second filter box in sequence.

[0005] The feature of this utility model is that, Inside the chemical feeding tank, a fine filter screen, a second support plate, a spiral static mixer, and a coarse filter screen are arranged horizontally in sequence. The coarse filter screen is vertically fixed to the water inlet side at the front end of the chemical feeding tank. The spiral static mixer is installed on the side of the coarse filter screen away from the chemical feeding tank via the second support plate. The spiral static mixer is horizontally fixed between the two second support plates via a connecting rod. The fine filter screen is fixed to the side of the spiral static mixer away from the coarse filter screen. A chemical reagent feeding tank is provided on the side of the chemical feeding tank, and the chemical reagent feeding tank is connected to the chemical feeding tank via a feeding pipe.

[0006] The spiral static mixer includes multiple spiral fins and guide plates, which are arranged alternately. A connecting rod passes through the spiral fins and guide plates in sequence and is fixed to the second support plate.

[0007] A filter washing assembly is provided on the rear side of the fine filter screen. The filter washing assembly includes two longitudinal track housings, which are symmetrically fixed to one side of the fine filter screen. A motor is fixed to the upper end of each of the two track housings, and a threaded rod is connected to the output end of the motor. The threaded rod is located inside the track housing.

[0008] The inner tracks of the two track housings are also equipped with sliders. The threaded rod and the sliders form a helical pair. A first connecting block is fixedly connected between the two sliders. A water spray box is horizontally fixed to the first connecting block. A variable frequency water pump is connected to the water spray box.

[0009] The top of the third filter box is fixed with a horizontal rail, and a vertical pulley is slidably connected on the horizontal rail. An oil removal scraper is suspended at the bottom of the vertical pulley. The oil removal scraper is fixedly connected to an oil suction box, and a suction pump is connected to the top of the oil suction box through a connecting pipe.

[0010] The bottom surface of the oil suction box has water-permeable openings around it. The bottom of the oil suction box is connected to oil suction nozzles with equal spacing threads. The bottom of the oil suction box is also connected to an oil layer thickness sensor. The suction pump is connected to an oil discharge pipe, which is connected to the second filter box.

[0011] The second filter box is equipped with a water filter membrane inside. An oil outlet is opened on the side of the second filter box. The second filter box is connected to a water storage tank through a connecting pipe. The water storage tank is connected to a water outlet pipe. The connecting pipe is also connected to the third filter box. The oil outlet is connected to an oil storage tank.

[0012] The beneficial effects of this utility model are: (1) The oilfield injection water treatment cyclone sludge collection gradient filtration device provided by this utility model can efficiently remove mud and sand and large particulate impurities in the reinjection water by setting a cyclone sludge collection device at the water inlet end; then, through the gradient filter group (coarse filter-fine filter), small particulate impurities are intercepted step by step to improve the water purity; then, through the oil layer thickness sensor at the bottom of the oil suction component, the oil layer status is monitored in real time and the lifting height of the oil suction box is adjusted, while the dosage of demulsifier in the dosing tank is dynamically controlled to achieve oil layer demulsification and precise separation; finally, the surface of the filter screen is cleaned by the variable frequency water pump after the reinjection water is extracted to ensure efficient declogging and reduce water consumption.

[0013] (2) The oilfield water injection treatment vortex collection gradient filtration device provided by this utility model uses a horizontal track + vertical pulley moving mechanism to drive the oil suction box to scan horizontally along the oil layer surface and lift vertically, ensuring real-time contact with the oil surface and improving the oil suction coverage rate; the oil suction box is equipped with oil removal scrapers on all four sides, which automatically scrape off residual oil on the box wall during the movement, avoiding oil stains from adhering and replacing manual cleaning.

[0014] (3) The oilfield water injection treatment vortex collection gradient filtration device provided by this utility model has a filter screen washing component that uses a variable frequency water pump to draw the treated reinjection water into the spray box. The motor drives the threaded rod to rotate, so that the slider can move up and down, and the spray box can wash the filter screen from top to bottom. At the same time, the washing water pressure is adjusted according to the degree of blockage. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the cyclone sludge collection gradient filtration device for oilfield water injection treatment; Figure 2 This is a schematic diagram of the box structure of the oilfield water injection treatment cyclone sludge collection gradient filtration device of this utility model; Figure 3 This is a schematic diagram of the spiral static mixer assembly of the cyclone sludge collection gradient filtration device for oilfield water injection treatment according to this utility model; Figure 4 This is a schematic diagram of the structure of the second filter box of the cyclone sludge collection gradient filtration device for oilfield water injection treatment of this utility model; Figure 5 This is a schematic diagram of the oil suction box of the cyclone sludge collection gradient filtration device for oilfield water injection treatment according to this utility model; Figure 6 This is a schematic diagram of the filter screen flushing component of the cyclone sludge collection gradient filtration device for oilfield water injection treatment.

[0016] In the diagram: 11. Inlet pipe; 12. Outlet pipe; 21. First filter box; 22. Sludge box; 23. Chemical reagent feeding tank; 24. Oil storage tank; 25. Second filter box; 26. Water storage tank; 27. Chemical feeding tank; 28. Third filter box; 31. Sludge collection hopper; 32. Suction pipe; 33. First support plate; 34. Sludge pump; 35. Sewage discharge pipe; 36. Baffle; 41. Coarse filter screen; 42. Second support plate; 43. Spiral static mixer; 431. Connecting rod; 432. Fins; 433. Guide plate; 44. 45. Feeding pipe; 501. Fine filter screen; 502. Motor; 503. Water permeable opening; 504. Connecting pipe; 505. Suction pump; 506. Oil discharge pipe; 507. Vertical pulley; 508. Oil-water separation membrane; 509. Horizontal track; 510. Oil removal scraper; 511. Oil suction box; 512. Oil suction nozzle; 513. Oil layer thickness sensor; 514. Connecting block; 515. Slider; 516. Water spray box; 517. Threaded rod; 518. Track housing; 61. Water filter membrane; 62. Oil outlet nozzle; 63. Connecting pipe. Detailed Implementation

[0017] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0018] This utility model provides a cyclone sludge collection gradient filtration device for oilfield injection water treatment, such as... Figure 1 and Figure 2 As shown, the system includes a first filter box 21 and a sludge collection hopper 31. An inlet pipe 11 is connected to the side wall of the first filter box 21. A sludge pump 34 is connected to the top of the first filter box 21 via a first support plate 33. The sludge pump 34 extends into the sludge collection hopper 31 via a suction pipe 32. A sludge tank 22 is located on the side wall of the first filter box 21. A drain pipe 35 is connected to the top of the sludge pump 34, and the outlet of the drain pipe 35 connects to the sludge tank 22. A baffle 36 is fixed to the side wall of the sludge collection hopper 31. A chemical feeding tank 27 is located on the other side of the baffle 36. The chemical feeding tank 27 is sequentially connected to a third filter box 28 and a second filter box 25. The interior of the chemical feeding tank 27... A fine filter screen 45, a second support plate 42, a spiral static mixer 43, and a coarse filter screen 41 are arranged sequentially along the horizontal direction. The coarse filter screen 41 is vertically fixed to the water inlet side of the front end of the chemical feeding tank 27. The spiral static mixer 43 is installed on the side of the coarse filter screen 41 away from the chemical feeding tank 27 through the second support plate 42. The spiral static mixer 43 is horizontally fixed between the two second support plates 42 through the connecting rod 431. The fine filter screen 45 is fixed to the side of the spiral static mixer 43 away from the coarse filter screen 41. A chemical reagent feeding tank 23 is provided on the side of the chemical feeding tank 27. The chemical reagent feeding tank 23 is connected to the chemical feeding tank 27 through the feeding pipe 44.

[0019] Among them, such as Figure 3As shown, the spiral static mixer 43 includes multiple spiral fins 432 and guide plates 433, with the spiral fins 432 and guide plates 433 arranged alternately. The connecting rod 431 passes through the spiral fins 432 and guide plates 433 in sequence and is fixedly connected to the second support plate 42.

[0020] like Figure 6 As shown, a filter washing assembly is provided on the rear side of the fine filter screen 45. The filter washing assembly includes two longitudinal track housings 517, which are symmetrically fixed to one side of the fine filter screen 45. A motor 501 is fixedly connected to the upper end of each track housing 517. The output end of the motor 501 is connected to a threaded rod 516, which is located inside the track housing 517. A slider 514 is also provided on the internal track of each track housing 517. The threaded rod 516 and the slider 514 form a helical pair. A first connecting block 513 is fixedly connected between the two sliders 514. A water spray box 515 is laterally fixed to the first connecting block 513, and a variable frequency water pump is connected to the water spray box 515. Figure 5 As shown, a horizontal rail 508 is fixedly connected to the top of the third filter box 28. A vertical pulley 506 is slidably connected to the horizontal rail 508. An oil scraper 509 is suspended at the bottom of the vertical pulley 506. An oil suction box 510 is fixedly connected to the oil scraper 509. A suction pump 504 is connected to the top of the oil suction box 510 through a connecting pipe 503. Water-permeable openings 502 are opened around the lower surface of the oil suction box 510. Oil suction nozzles 511 are threaded at equal intervals at the bottom of the oil suction box 510. An oil layer thickness sensor 512 is also connected to the bottom of the oil suction box 510. The suction pump 504 is connected to an oil discharge pipe 505, which is connected to the second filter box 25.

[0021] like Figure 4 As shown, the second filter box 25 is equipped with a water filter membrane 61 inside, and an oil outlet 62 is opened on the side of the second filter box 25. The second filter box 25 is connected to a water storage tank 26 through a connecting pipe 63. The water storage tank 26 is connected to a water outlet pipe 12. The connecting pipe 63 is also connected to the third filter box 28. The oil outlet 62 is connected to an oil storage tank 24.

[0022] The oilfield injection water treatment cyclone sludge collection gradient filtration device provided by this utility model works as follows: After the reinjection water enters the first filter box 21 through the inlet pipe 11, the baffle 36 first blocks the water flow from directly entering the chemical feed box 27 on the left, causing the reinjection water to form a slow flow in the first filter box 21. The silt and large particles carried in the water settle naturally under the action of gravity. The settled sludge is collected in the sludge tank through the bottom funnel-shaped sludge collection hopper 31. The sludge pump 34 periodically sucks up the sludge through the suction pipe 32 and discharges it into the sludge tank 22 through the discharge pipe 35, realizing solid-liquid separation. After sedimentation, the wastewater bypasses the baffle 36 and enters the chemical feed tank 27. First, it passes through the coarse filter 41 to intercept large suspended solids and impurities. Then, based on the real-time monitoring data from the oil layer thickness sensor 512 at the bottom of the oil suction box 510, the chemical reagent feed tank 23 injects flocculant or demulsifier into the spiral static mixer 43 through the feed pipe 44. When the water flows through the spiral static mixer 43, the spiral fins 432 and the guide plate 433 inside force the water flow to form turbulence, so as to achieve a full mixing reaction between the reagent and the wastewater, and promote the separation of oil, suspended solids and water.

[0023] The mixed wastewater continues to flow through the fine filter screen 45, which further intercepts tiny particles and flocculents. The track-type flushing system on its back drives the spray box 515 to move up and down via the motor 501, and uses the high-pressure water flow regulated by the variable frequency water pump to periodically flush the surface of the fine filter screen 45 to prevent clogging.

[0024] The filtered wastewater enters the third filter box 28, where the oil-water separation membrane 507 separates the floating oil from the water, and the oil layer accumulates on the water surface. The oil layer thickness sensor 512 monitors the oil layer thickness in real time and activates the oil suction assembly: the oil suction assembly performs oil removal under the coordinated action of the horizontal rail 508 and the vertical pulley 506. The oil suction nozzle 511 at the bottom of the oil suction box 510 sucks up the surface floating oil, while the oil removal scraper 509 scrapes off the residual oil film. The separated crude oil is discharged into the second filter box 25 through the oil discharge pipe 505 via the suction pump 504. After further separation by the water filter membrane 61, the crude oil enters the oil storage tank 24 through the oil outlet 62, and the purified water enters the water storage tank 26 through the connecting pipe 63, and is finally discharged through the water outlet pipe 12.

[0025] Example 1 This utility model provides a cyclone sludge collection gradient filtration device for oilfield injection water treatment, such as... Figure 1 and Figure 2As shown, the system includes a first filter box 21 and a sludge collection hopper 31. The side wall of the first filter box 21 is connected to an inlet pipe 11. The top of the first filter box 21 is connected to a sludge pump 34 via a first support plate 33. The sludge pump 34 extends into the sludge collection hopper 31 via a suction pipe 32. The side wall of the first filter box 21 is provided with a sludge tank 22. The top of the sludge pump 34 is connected to a drain pipe 35, and the outlet of the drain pipe 35 is connected to the sludge tank 22. The side wall of the sludge collection hopper 31 is fixed with a baffle 36. The other side of the baffle 36 is provided with a chemical feeding box 27. The chemical feeding box 27 is connected in sequence to a third filter box 28 and a second filter box 25.

[0026] Example 2 This utility model provides a cyclone sludge collection gradient filtration device for oilfield injection water treatment, such as... Figure 1 and Figure 2 As shown, the system includes a first filter box 21 and a sludge collection hopper 31. An inlet pipe 11 is connected to the side wall of the first filter box 21. A sludge pump 34 is connected to the top of the first filter box 21 via a first support plate 33. The sludge pump 34 extends into the sludge collection hopper 31 via a suction pipe 32. A sludge tank 22 is located on the side wall of the first filter box 21. A drain pipe 35 is connected to the top of the sludge pump 34, and the outlet of the drain pipe 35 connects to the sludge tank 22. A baffle 36 is fixed to the side wall of the sludge collection hopper 31. A chemical feeding tank 27 is located on the other side of the baffle 36. The chemical feeding tank 27 is sequentially connected to a third filter box 28 and a second filter box 25. The interior of the chemical feeding tank 27... A fine filter screen 45, a second support plate 42, a spiral static mixer 43, and a coarse filter screen 41 are arranged sequentially along the horizontal direction. The coarse filter screen 41 is vertically fixed to the water inlet side of the front end of the chemical feeding tank 27. The spiral static mixer 43 is installed on the side of the coarse filter screen 41 away from the chemical feeding tank 27 through the second support plate 42. The spiral static mixer 43 is horizontally fixed between the two second support plates 42 through the connecting rod 431. The fine filter screen 45 is fixed to the side of the spiral static mixer 43 away from the coarse filter screen 41. A chemical reagent feeding tank 23 is provided on the side of the chemical feeding tank 27. The chemical reagent feeding tank 23 is connected to the chemical feeding tank 27 through the feeding pipe 44.

[0027] Among them, such as Figure 3 As shown, the spiral static mixer 43 includes multiple spiral fins 432 and guide plates 433, with the spiral fins 432 and guide plates 433 arranged alternately. The connecting rod 431 passes through the spiral fins 432 and guide plates 433 in sequence and is fixedly connected to the second support plate 42.

[0028] like Figure 6As shown, a filter washing assembly is provided on the rear side of the fine filter screen 45. The filter washing assembly includes two longitudinal track housings 517. The two track housings 517 are symmetrically fixed to one side of the fine filter screen 45. A motor 501 is fixedly connected to the upper end of each of the two track housings 517. The output end of the motor 501 is connected to a threaded rod 516, which is located inside the track housing 517. A slider 514 is also provided on the internal track of the two track housings 517. The threaded rod 516 and the slider 514 form a helical pair. A first connecting block 513 is fixedly connected between the two sliders 514. A water spray box 515 is horizontally fixed to the first connecting block 513. A variable frequency water pump is connected to the water spray box 515.

[0029] Example 3 This utility model provides a cyclone sludge collection gradient filtration device for oilfield injection water treatment, such as... Figure 1 and Figure 2 As shown, the system includes a first filter box 21 and a sludge collection hopper 31. An inlet pipe 11 is connected to the side wall of the first filter box 21. A sludge pump 34 is connected to the top of the first filter box 21 via a first support plate 33. The sludge pump 34 extends into the sludge collection hopper 31 via a suction pipe 32. A sludge tank 22 is located on the side wall of the first filter box 21. A drain pipe 35 is connected to the top of the sludge pump 34, and the outlet of the drain pipe 35 connects to the sludge tank 22. A baffle 36 is fixed to the side wall of the sludge collection hopper 31. A chemical feeding tank 27 is located on the other side of the baffle 36. The chemical feeding tank 27 is sequentially connected to a third filter box 28 and a second filter box 25. The interior of the chemical feeding tank 27... A fine filter screen 45, a second support plate 42, a spiral static mixer 43, and a coarse filter screen 41 are arranged sequentially along the horizontal direction. The coarse filter screen 41 is vertically fixed to the water inlet side of the front end of the chemical feeding tank 27. The spiral static mixer 43 is installed on the side of the coarse filter screen 41 away from the chemical feeding tank 27 through the second support plate 42. The spiral static mixer 43 is horizontally fixed between the two second support plates 42 through the connecting rod 431. The fine filter screen 45 is fixed to the side of the spiral static mixer 43 away from the coarse filter screen 41. A chemical reagent feeding tank 23 is provided on the side of the chemical feeding tank 27. The chemical reagent feeding tank 23 is connected to the chemical feeding tank 27 through the feeding pipe 44.

[0030] Among them, such as Figure 3 As shown, the spiral static mixer 43 includes multiple spiral fins 432 and guide plates 433, with the spiral fins 432 and guide plates 433 arranged alternately. The connecting rod 431 passes through the spiral fins 432 and guide plates 433 in sequence and is fixedly connected to the second support plate 42.

[0031] Example 4 This utility model provides a cyclone sludge collection gradient filtration device for oilfield injection water treatment, such as... Figure 1 and Figure 2As shown, the system includes a first filter box 21 and a sludge collection hopper 31. An inlet pipe 11 is connected to the side wall of the first filter box 21. A sludge pump 34 is connected to the top of the first filter box 21 via a first support plate 33. The sludge pump 34 extends into the sludge collection hopper 31 via a suction pipe 32. A sludge tank 22 is located on the side wall of the first filter box 21. A drain pipe 35 is connected to the top of the sludge pump 34, and the outlet of the drain pipe 35 connects to the sludge tank 22. A baffle 36 is fixed to the side wall of the sludge collection hopper 31. A chemical feeding tank 27 is located on the other side of the baffle 36. The chemical feeding tank 27 is sequentially connected to a third filter box 28 and a second filter box 25. The interior of the chemical feeding tank 27... A fine filter screen 45, a second support plate 42, a spiral static mixer 43, and a coarse filter screen 41 are arranged sequentially along the horizontal direction. The coarse filter screen 41 is vertically fixed to the water inlet side of the front end of the chemical feeding tank 27. The spiral static mixer 43 is installed on the side of the coarse filter screen 41 away from the chemical feeding tank 27 through the second support plate 42. The spiral static mixer 43 is horizontally fixed between the two second support plates 42 through the connecting rod 431. The fine filter screen 45 is fixed to the side of the spiral static mixer 43 away from the coarse filter screen 41. A chemical reagent feeding tank 23 is provided on the side of the chemical feeding tank 27. The chemical reagent feeding tank 23 is connected to the chemical feeding tank 27 through the feeding pipe 44.

[0032] Among them, such as Figure 3 As shown, the spiral static mixer 43 includes multiple spiral fins 432 and guide plates 433, with the spiral fins 432 and guide plates 433 arranged alternately. The connecting rod 431 passes through the spiral fins 432 and guide plates 433 in sequence and is fixedly connected to the second support plate 42. Figure 6 As shown, a filter washing assembly is provided on the rear side of the fine filter screen 45. The filter washing assembly includes two longitudinal track housings 517. The two track housings 517 are symmetrically fixed to one side of the fine filter screen 45. A motor 501 is fixedly connected to the upper end of each of the two track housings 517. The output end of the motor 501 is connected to a threaded rod 516, which is located inside the track housing 517. A slider 514 is also provided on the internal track of the two track housings 517. The threaded rod 516 and the slider 514 form a helical pair. A first connecting block 513 is fixedly connected between the two sliders 514. A water spray box 515 is horizontally fixed to the first connecting block 513. A variable frequency water pump is connected to the water spray box 515.

[0033] Example 5 This utility model provides a cyclone sludge collection gradient filtration device for oilfield injection water treatment, such as... Figure 1 and Figure 2As shown, the system includes a first filter box 21 and a sludge collection hopper 31. An inlet pipe 11 is connected to the side wall of the first filter box 21. A sludge pump 34 is connected to the top of the first filter box 21 via a first support plate 33. The sludge pump 34 extends into the sludge collection hopper 31 via a suction pipe 32. A sludge tank 22 is located on the side wall of the first filter box 21. A drain pipe 35 is connected to the top of the sludge pump 34, and the outlet of the drain pipe 35 connects to the sludge tank 22. A baffle 36 is fixed to the side wall of the sludge collection hopper 31. A chemical feeding tank 27 is located on the other side of the baffle 36. The chemical feeding tank 27 is sequentially connected to a third filter box 28 and a second filter box 25. The interior of the chemical feeding tank 27... A fine filter screen 45, a second support plate 42, a spiral static mixer 43, and a coarse filter screen 41 are arranged sequentially along the horizontal direction. The coarse filter screen 41 is vertically fixed to the water inlet side of the front end of the chemical feeding tank 27. The spiral static mixer 43 is installed on the side of the coarse filter screen 41 away from the chemical feeding tank 27 through the second support plate 42. The spiral static mixer 43 is horizontally fixed between the two second support plates 42 through the connecting rod 431. The fine filter screen 45 is fixed to the side of the spiral static mixer 43 away from the coarse filter screen 41. A chemical reagent feeding tank 23 is provided on the side of the chemical feeding tank 27. The chemical reagent feeding tank 23 is connected to the chemical feeding tank 27 through the feeding pipe 44.

[0034] Among them, such as Figure 3 As shown, the spiral static mixer 43 includes multiple spiral fins 432 and guide plates 433, with the spiral fins 432 and guide plates 433 arranged alternately. The connecting rod 431 passes through the spiral fins 432 and guide plates 433 in sequence and is fixedly connected to the second support plate 42. Figure 6 As shown, a filter washing assembly is provided on the rear side of the fine filter screen 45. The filter washing assembly includes two longitudinal track housings 517. The two track housings 517 are symmetrically fixed to one side of the fine filter screen 45. A motor 501 is fixedly connected to the upper end of each of the two track housings 517. The output end of the motor 501 is connected to a threaded rod 516, which is located inside the track housing 517. A slider 514 is also provided on the internal track of the two track housings 517. The threaded rod 516 and the slider 514 form a helical pair. A first connecting block 513 is fixedly connected between the two sliders 514. A water spray box 515 is horizontally fixed to the first connecting block 513. A variable frequency water pump is connected to the water spray box 515.

[0035] like Figure 5 As shown, a horizontal rail 508 is fixedly connected to the top of the third filter box 28. A vertical pulley 506 is slidably connected to the horizontal rail 508. An oil removal scraper 509 is suspended at the bottom of the vertical pulley 506. An oil suction box 510 is fixedly connected to the oil removal scraper 509. A suction pump 504 is connected to the top of the oil suction box 510 through a connecting pipe 503.

[0036] Example 6 This utility model provides a cyclone sludge collection gradient filtration device for oilfield injection water treatment, such as... Figure 1 and Figure 2 As shown, the system includes a first filter box 21 and a sludge collection hopper 31. An inlet pipe 11 is connected to the side wall of the first filter box 21. A sludge pump 34 is connected to the top of the first filter box 21 via a first support plate 33. The sludge pump 34 extends into the sludge collection hopper 31 via a suction pipe 32. A sludge tank 22 is located on the side wall of the first filter box 21. A drain pipe 35 is connected to the top of the sludge pump 34, and the outlet of the drain pipe 35 connects to the sludge tank 22. A baffle 36 is fixed to the side wall of the sludge collection hopper 31. A chemical feeding tank 27 is located on the other side of the baffle 36. The chemical feeding tank 27 is sequentially connected to a third filter box 28 and a second filter box 25. The interior of the chemical feeding tank 27... A fine filter screen 45, a second support plate 42, a spiral static mixer 43, and a coarse filter screen 41 are arranged sequentially along the horizontal direction. The coarse filter screen 41 is vertically fixed to the water inlet side of the front end of the chemical feeding tank 27. The spiral static mixer 43 is installed on the side of the coarse filter screen 41 away from the chemical feeding tank 27 through the second support plate 42. The spiral static mixer 43 is horizontally fixed between the two second support plates 42 through the connecting rod 431. The fine filter screen 45 is fixed to the side of the spiral static mixer 43 away from the coarse filter screen 41. A chemical reagent feeding tank 23 is provided on the side of the chemical feeding tank 27. The chemical reagent feeding tank 23 is connected to the chemical feeding tank 27 through the feeding pipe 44.

[0037] Among them, such as Figure 3 As shown, the spiral static mixer 43 includes multiple spiral fins 432 and guide plates 433, with the spiral fins 432 and guide plates 433 arranged alternately. The connecting rod 431 passes through the spiral fins 432 and guide plates 433 in sequence and is fixedly connected to the second support plate 42.

[0038] like Figure 6 As shown, a filter washing assembly is provided on the rear side of the fine filter screen 45. The filter washing assembly includes two longitudinal track housings 517. The two track housings 517 are symmetrically fixed to one side of the fine filter screen 45. A motor 501 is fixedly connected to the upper end of each of the two track housings 517. The output end of the motor 501 is connected to a threaded rod 516, which is located inside the track housing 517. A slider 514 is also provided on the internal track of the two track housings 517. The threaded rod 516 and the slider 514 form a helical pair. A first connecting block 513 is fixedly connected between the two sliders 514. A water spray box 515 is horizontally fixed to the first connecting block 513. A variable frequency water pump is connected to the water spray box 515.

[0039] like Figure 5As shown, a horizontal rail 508 is fixedly connected to the top of the third filter box 28. A vertical pulley 506 is slidably connected to the horizontal rail 508. An oil scraper 509 is suspended at the bottom of the vertical pulley 506. An oil suction box 510 is fixedly connected to the oil scraper 509. A suction pump 504 is connected to the top of the oil suction box 510 through a connecting pipe 503. Water-permeable openings 502 are opened around the lower surface of the oil suction box 510. Oil suction nozzles 511 are threaded at equal intervals at the bottom of the oil suction box 510. An oil layer thickness sensor 512 is also connected to the bottom of the oil suction box 510. The suction pump 504 is connected to an oil discharge pipe 505, which is connected to the second filter box 25.

[0040] like Figure 4 As shown, the second filter box 25 is equipped with a water filter membrane 61 inside, and an oil outlet 62 is opened on the side of the second filter box 25. The second filter box 25 is connected to a water storage tank 26 through a connecting pipe 63. The water storage tank 26 is connected to a water outlet pipe 12. The connecting pipe 63 is also connected to the third filter box 28. The oil outlet 62 is connected to an oil storage tank 24.

Claims

1. An oilfield water injection water treatment cyclone sump gradient filtration device, characterized in that, The utility model provides a sewage treatment device, including first filter box (21) with the sump (31), the side wall of first filter box (21) is connected with water inlet pipe (11), and the top of first filter box (21) is connected with sludge pump (34) through first support plate (33), and sludge pump (34) extends to sump (31) through suction pipe (32), and the side wall of first filter box (21) is equipped with sludge tank (22), and the top of sludge pump (34) is connected with blow-off pipe (35), and the outlet of blow-off pipe (35) is connected with sludge tank (22), and the side wall of sump (31) is fixed with baffle (36), and the other side of baffle (36) is equipped with chemical feeding tank (27), and chemical feeding tank (27) is sequentially connected with third filter box (28) and second filter box (25), and the inside of chemical feeding tank (27) is sequentially provided with fine filter screen (45), second support plate (42), helical static mixer (43) and coarse filter screen (41) along the horizontal direction, and the coarse filter screen (41) is vertically fixed on the water inlet side of the front end of chemical feeding tank (27), and the side, away from chemical feeding tank (27) of coarse filter screen (41) is connected helical static mixer (43) through second support plate (42), and helical static mixer (43) is transversely fixed between the second support plate (42) of both sides through connecting rod (431), and the side, away from coarse filter screen (41) of helical static mixer (43) is fixedly connected with fine filter screen (45), and the side of chemical feeding tank (27) is equipped with chemical reagent feeding barrel (23), and chemical reagent feeding barrel (23) is connected with chemical feeding tank (27) through feeding pipe (44).

2. The oilfield waterflood water treatment hydrocyclone catch basin gradient filtration device of claim 1, wherein, The helical static mixer (43) includes a plurality of helical fins (432) and guide plates (433), the helical fins (432) and the guide plates (433) are alternately arranged, and the connecting rods (431) are sequentially penetrated through the helical fins (432) and the guide plates (433) and fixedly connected with the second support plates (42).

3. The oilfield waterflood water treatment hydrocyclone settling gradient filtration device of claim 1, wherein, The rear side of the fine filter screen (45) is provided with a filter screen washing assembly, the filter screen washing assembly includes two longitudinal track housings (517), the two track housings (517) are symmetrically fixed to one side of the fine filter screen (45), the upper ends of the two track housings (517) are respectively fixedly connected with motors (501), the output ends of the motors (501) are connected with threaded rods (516), and the threaded rods (516) are located in the track housings (517).

4. The oilfield waterflood water treatment hydrocyclone settling gradient filtration device of claim 3, wherein, The inner tracks of the two track housings (517) are further provided with sliding blocks (514), the threaded rods (516) and the sliding blocks (514) constitute a screw pair, the first connecting block (513) is fixedly connected between the two sliding blocks (514), the first connecting block (513) is transversely fixedly connected with a water spraying box (515), and the water spraying box (515) is connected with a variable frequency water pump.

5. The oilfield waterflood water treatment hydrocyclone settling gradient filtration device of claim 1, wherein, The top of the third filter box (28) is fixedly connected with a transverse rail (508), a vertical pulley (506) is slidably connected on the transverse rail (508), an oil removing scraper (509) is hung at the bottom of the vertical pulley (506), the oil removing scraper (509) is fixedly connected with an oil suction box (510), and the top of the oil suction box (510) is connected with a suction pump (504) through a connecting pipe (503).

6. The oilfield waterflood water treatment hydrocyclone settling gradient filtration device, as claimed in claim 5, wherein, A water permeable opening (502) is formed around the lower surface of the oil suction box (510), oil suction nozzles (511) are screw-connected to the bottom of the oil suction box (510) at equal intervals, an oil layer thickness sensor (512) is further connected to the bottom of the oil suction box (510), the suction pump (504) is connected with an oil discharge pipeline (505), and the oil discharge pipeline (505) is connected into the second filter box (25).

7. The oilfield waterflood water treatment hydrocyclone settling gradient filtration device of claim 6, wherein, The second filter box (25) is internally provided with a water filtering membrane (61), an oil outlet nozzle (62) is formed on the side of the second filter box (25), the second filter box (25) is connected with a water storage tank (26) through a connecting pipe (63), the water storage tank (26) is connected with a water outlet pipe (12), the connecting pipe (63) is further connected into the third filter box (28), and the oil outlet nozzle (62) is connected with an oil storage tank (24).

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