A self-cleaning spray filter

Abstract

The application discloses a self-cleaning spray filter, which comprises a flat-bottom filter tank, a conical cover unit, an air suction unit, a lower reducing cylinder and a self-cleaning conical cover, and the lower reducing cylinder and the self-cleaning conical cover are internally provided with a spray unit and a self-cleaning unit. The spray unit comprises a spray cylinder and a lower flange and an upper flange of the spray cylinder, and the wall of the spray cylinder is provided with a spray screw pipe head and a self-cleaning screw pipe head. The self-cleaning unit comprises a self-cleaning ring pipe and a meshed conical wall and the self-cleaning conical cover, one spray washing nozzle is arranged on the ring line of the self-cleaning ring pipe at intervals, and the meshed conical wall is welded to the inner edge of the self-cleaning ring. The application has the advantages of compact structure, small space occupation, good sewage interception effect, energy-saving and environment-friendly recycling of atomized water, and effective avoidance of backflow of the intercepted oil stains into the air suction pipe during transient faults such as power failure, thereby causing greater combustion or explosion accidents.

Description

Technical Field

[0001] The present invention relates to the technical field of volatile organic compound waste gas treatment, and in particular to a self-cleaning spray filter. Background Art

[0002] Currently, resources are relatively scarce. Faced with the need for high-quality development under the dual-carbon climate, China is encouraging the development of a circular economy. The recycling of waste plastics is a prime example of this circular, low-carbon economy. However, the processing and reuse of waste plastics inevitably generates organic waste gases, the direct emission of which can have a significant impact on the environment.

[0003] The existing plastic recycling process is mainly a hot melt recycling process, including hot melting, extrusion, cooling, pelletizing and packaging. The production waste gas is mainly generated in the hot melting and extrusion process. The waste gas contains various types of dust, organic mucus particles and harmful gases and strange odor components.

[0004] Activated carbon can generally be used to effectively remove harmful gases and strange odors. For dust and organic slime particles, water spraying technology in a spray tower is primarily used. This spraying allows water droplets to collide with the dust and organic slime particles. A significant amount of waste gas leaks through this process, still carrying a large amount of dust and organic slime particles, and is directly sucked into the air pump before being sent to the activated carbon deodorizer. This causes the activated carbon medium in the deodorizer to become coated with dust and organic slime particles, rendering it useless and quickly losing its harmless emission properties. Furthermore, the dust and organic slime particles contained in this leaked waste gas continuously accumulate and foul the air pump blades and flow channel walls, increasing energy consumption exponentially and even clogging the pre-filter, rendering it inoperable. Regular production stops or equipment replacements are necessary for removal. Summary of the Invention

[0005] In response to the above problems, the present invention provides a self-cleaning spray filter, a new type of self-cleaning gas-dust separator with controllable water mist particle size and distribution, high-efficiency pollution and dust interception and autonomous cleaning and recovery functions, providing an intelligent, controllable, clean and efficient technical option for waste gas treatment in the waste material reproduction process.

[0006] The invention comprises a flat bottom filter tank, a cone cover unit, an air suction unit, a lower diameter reducing cylinder and a self-cleaning cone cover.

[0007] The lower reducing cylinder is composed of a lower cylinder conical surface, a lower cylinder lower flange and a lower cylinder upper flange. A spray unit and a self-cleaning unit are arranged inside the lower reducing cylinder and the self-cleaning cone cover.

[0008] The spray unit comprises a spray cylinder, a lower flange, and an upper flange. A spray coil head and a self-cleaning coil head are mounted on the wall of the spray cylinder. The self-cleaning coil head is positioned above the spray coil head, and a wall guide ring is mounted on the inner wall above the self-cleaning coil head. One end of the main spray pipe is sealed with a plugging plug. The other end is removably and tightly secured to the spray coil head via a spray pipe connector of any structure. Spray branch pipes are mounted on the bottom of the main spray pipe. Spray pipe clip feet are fixed to the inner wall of the spray cylinder. A pair of spray pipe clip elastic claws removably secure the ends of a spray branch pipe, distal to the spray pipe connector, to the inner wall of the spray cylinder.

[0009] The self-cleaning unit includes a self-cleaning ring tube, a mesh cone wall and a self-cleaning cone cover. The center end of the self-cleaning ring tube is sealed, and the outer ring end of the self-cleaning ring tube is detachably and tightly fastened to the self-cleaning spiral tube head through a self-cleaning pipe joint of any structure; a spray nozzle is arranged at intervals on the ring line of the self-cleaning ring tube, and the outlet of the spray nozzle is vertically upward. A self-cleaning buckle is provided on each ring of the self-cleaning ring tube, and the bottom foot of the self-cleaning buckle is fixed on the inner wall of the mesh cone wall. The elastic claw of the self-cleaning buckle detachably fixes the self-cleaning ring tube.

[0010] The bottom ring of the mesh cone wall is welded to the inner edge of the self-cleaning ring, the inner edge of the self-cleaning ring and the self-cleaning flange ring are connected by a self-cleaning ring connecting rib, a self-cleaning ring hole groove is provided between the inner edge of the self-cleaning ring and the self-cleaning flange ring, and two adjacent self-cleaning ring hole grooves are separated by a self-cleaning ring connecting rib.

[0011] The suction unit includes a suction cylinder and a lower flange and an upper flange of the spray and suction cylinder. One to three inner drooping short tubes and outer drooping suction pipes are tightly fixed on the suction cylinder. The inner drooping short tubes and the outer drooping suction pipes are tightly connected. The inner end of the inner drooping short tube is provided with a suction port rib.

[0012] The cone cover unit comprises a flat bottom barrel, a cone upper cover, a cone cover lower flange and a cone cover upper flange. An inner filter hole is opened on the wall of the flat bottom barrel, and the inner filter hole is located in the middle of the height of the flat bottom barrel.

[0013] The flat-bottom filter adopts a multi-ring structure, and is sequentially provided with: a first-level low cylinder, a middle-circle high cylinder, a second-level low cylinder and a filter outer cylinder from the inside to the outside. The filter outer cylinder is provided with a filter drain hole at a low position, a filter overflow hole at a high position, a filter circulation hole at the middle position of the filter outer cylinder, an outer cylinder flange at the upper end of the filter outer cylinder, and a middle filtration hole at the middle position of the middle-circle high cylinder.

[0014] The upper plane of the spray and suction cylinder upper flange and the lower plane of the lower cylinder lower flange are detachably sealed and fixedly connected, and the upper plane of the lower cylinder upper flange and the lower plane of the spray cylinder lower flange are detachably sealed and fixedly connected.

[0015] A self-cleaning flange ring is detachably and hermetically fixed between the upper plane of the spray barrel upper flange and the lower plane of the cone cover lower flange. The upper plane of the cone cover upper flange is detachably and hermetically fixedly connected to the spray exhaust pipe.

[0016] As a further improvement: a water supply inlet pipe, a water filter header and a spray pipeline are provided on the circulating water tank, a spray booster pump is provided in series on the spray pipeline, and the water filter header is connected to the filter tank circulation hole.

[0017] As a further improvement: a self-cleaning pipeline is provided on the chemical water tank, and a self-cleaning booster pump is provided in series on the self-cleaning pipeline.

[0018] As a further improvement: the upper plane of the outer cylinder flange and the lower plane of the cone cover lower flange are detachably sealed and fixedly connected, and the upper plane of the cone cover upper flange and the lower plane of the ejector and suction cylinder lower flange are detachably sealed and fixedly connected.

[0019] As a further improvement, the wall guide ring guides the sewage generated during the self-cleaning process to drip along the dripping edge of the guide ring without adhering to the inner wall of the spray cylinder again.

[0020] Beneficial effects of the present invention:

[0021] 1. The self-cleaning spray filter, which uses both self-cleaning and spray functions, replaces the traditional spray tower. It has a compact structure and thoroughly intercepts pollutants. The self-cleaning spray filter's unique technical features include a spray unit with a compact design, small footprint, and excellent pollutant interception. The atomized water is recycled for energy conservation and environmental protection. The spray unit generates nano-scale water mist that effectively absorbs organic matter, mucus particles, and fine dust. The self-cleaning unit allows for periodic self-cleaning without disassembling the equipment.

[0022] Second, the function of the wall guide ring is to guide the sewage generated during the self-cleaning process to drip along the dripping edge of the guide ring without adhering to the inner wall of the spray cylinder again.

[0023] The benefit of the drooping outer suction pipe is that it provides a smoother overall intake flow. The inner drooping short pipe sacrifices local resistance to effectively prevent trapped oil from flowing back into the suction pipe during transient faults such as power outages, potentially causing a larger combustion or explosion. During transient faults such as power outages, the hot melt and wire extrusion equipment remains at high temperature and negative pressure, creating a risk of transient backflow.

[0024] 4. The conical surface design of the upper cover is convenient for disassembly and cleaning, and can provide strong support for the upper equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 Schematic diagram of the overall cross-section of the self-cleaning spray filter of the present invention;

[0026] Figure 2This is an enlarged schematic diagram of the flat bottom filter tank;

[0027] Figure 3 It is an enlarged schematic diagram of the cone cover unit;

[0028] Figure 4 This is an enlarged schematic diagram of the air intake unit;

[0029] Figure 5 This is an enlarged schematic diagram of the lower reducer;

[0030] Figure 6 This is an enlarged schematic diagram of the combined parts of the spray unit and the self-cleaning unit;

[0031] Figure 7 This is a separate enlarged schematic diagram of the spray cylinder;

[0032] Figure 8 This is a separate enlarged schematic diagram of the spray main pipe;

[0033] Figure 9 This is a top view of the spray main pipe;

[0034] Figure 10 It is an enlarged schematic diagram of the self-cleaning unit;

[0035] Figure 11 This is a top view of the self-cleaning ring pipe;

[0036] Figure 12 This is a partial enlarged view of the jet washing nozzle;

[0037] Figure 13 This is a top view of the self-cleaning flange ring;

[0038] Figure 14 This is an enlarged schematic diagram of the self-cleaning cone cover;

[0039] Figure 15 It is a schematic diagram of the present invention;

[0040] Figure 16 It is a top view of the present invention.

[0041] In the figure, the flat bottom filter 10, the filter outer cylinder 11, the outer cylinder flange 12, the filter drain hole 13, the middle ring high cylinder 14, the secondary low cylinder 15, the filter circulation hole 16, the middle filter hole 17, the filter overflow hole 18, the primary low cylinder 19, the cone cover unit 20, the cone cover lower flange 21, the flat bottom cylinder 22, the cone cover upper flange 23, the inner filter hole 24, the cone upper cover 28, the suction unit 30, the inner hanging short pipe 31, the spray and suction cylinder lower flange 3 2. Suction cylinder 33, upper flange of spray and suction cylinder 34, outer drooping suction pipe 35, drip edge of guide ring 36, drip edge of short pipe 37, suction port rib 39, lower reducer 40, lower flange of lower cylinder 43, upper flange of lower cylinder 45, cone surface of lower cylinder 44, spray unit 50, spray main pipe 51, wall guide ring 52, spray pipe buckle 53, lower flange of spray cylinder 54, spray cylinder 55, upper flange of spray cylinder 56, spray umbrella nozzle 57, spray Mist pipe joint 58, spray branch pipe 59, self-cleaning unit 60, self-cleaning ring inner edge 61, self-cleaning ring hole groove 62, self-cleaning ring connecting rib 63, self-cleaning flange ring 64, self-cleaning ring pipe 65, mesh cone wall 66, spray nozzle 67, self-cleaning pipe joint 68, self-cleaning buckle 69, self-cleaning cone cover 70, cone cover lower flange 76, cone cover cone surface 77, cone cover upper flange 79, circulating water tank 80, filter water collection pipe 81, self-cleaning pipeline 82, Spray pipeline 83, spray booster pump 84, spray spiral tube head 85, self-cleaning spiral tube head 86, self-cleaning booster pump 87, water supply inlet pipe 88, spray exhaust pipe 89, chemical water tank 90, separator inlet 91, water vapor separator 92, separator outlet 93, fan suction port 94, suction and exhaust fan 95, fan exhaust port 96, deodorizer suction port 97, activated carbon deodorizer 98, deodorizer exhaust pipe 99, 100 high-altitude chimney. DETAILED DESCRIPTION

[0042] like Figure 1 As shown, a self-cleaning spray filter with self-cleaning and spraying functions includes a flat-bottom filter tank 10, a cone cover unit 20, an air intake unit 30, a lower reducer 40 and a self-cleaning cone cover 70. As an improvement: a spray unit 50 and a self-cleaning unit 60 are arranged between the lower reducer 40 and the self-cleaning cone cover 70. The spray unit 50 generates nano-scale water mist which can better absorb organic mucus particles and dust. The self-cleaning unit 60 realizes decontamination by self-punching regularly without disassembling the equipment for decontamination.

[0043] The spray unit 50 includes a spray cylinder 55, a spray cylinder lower flange 54, and a spray cylinder upper flange 56. A spray spiral head 85 and a self-cleaning spiral head 86 are provided on the wall of the spray cylinder 55. The self-cleaning spiral head 86 is located at a high position of the spray spiral head 85. A wall guide ring 52 is further provided on the inner wall above the self-cleaning spiral head 86. The function of the wall guide ring 52 is to guide the sewage generated during the self-cleaning process to drip along the guide ring drip edge 36 without adhering to the inner wall of the spray cylinder 55 again. Figure 6 and Figure 7 shown.

[0044] One end of the spray main pipe 51 is sealed by a plugging head, and the other end of the spray main pipe 51 is detachably and tightly fastened to the spray spiral pipe head 85 through a spray pipe joint 58 of any structure. A spray branch pipe 59 is provided on the bottom surface of the spray main pipe 51. In the embodiment, nine spray branch pipes 59 are selected. The two ends of a spray branch pipe 59 away from the spray pipe joint 58 are fixed to the inner wall of the spray cylinder 55 through a pair of spray pipe clips 53; the spray branch pipe 59 is provided with a spray umbrella nozzle 57 downward, and the circular spray area generated by adjacent spray umbrella nozzles 57 has a 20-30% overlap, ensuring that the spray interception is efficient and thorough. Figure 8 and Figure 9 shown.

[0045] The self-cleaning unit 60 includes a self-cleaning ring tube 65, a mesh cone wall 66 and a self-cleaning cone cover 70. The self-cleaning cone cover 70 is composed of a cone cover cone surface 77, a cone cover lower flange 76 and a cone cover upper flange 79. Figure 14 As shown. The center end of the self-cleaning ring tube 65 is sealed, and the outer ring end of the self-cleaning ring tube 65 is detachably and tightly fastened to the self-cleaning spiral tube head 86 through a self-cleaning pipe joint 68 of arbitrary structure; a spray nozzle 67 with an equivalent diameter of 0.5 to 0.9 mm is set at a spacing of 5 to 9 cm on the self-cleaning ring tube 65, and a spray nozzle 67 with an equivalent diameter of 0.7 mm is set at a spacing of 7 cm in the embodiment; the outlet of the spray nozzle 67 is vertically upward, and 3 to 5 self-cleaning buckles 69 are set on each ring of the self-cleaning ring tube 65. In the embodiment, 4 self-cleaning buckles 69 are set on each ring of the self-cleaning ring tube 65, as shown. Figure 10 、 Figure 11 and Figure 12 shown.

[0046] The bottom foot of the self-cleaning buckle 69 is fixed on the inner wall of the mesh cone wall 66 , and the elastic claws of the self-cleaning buckle 69 detachably fix the self-cleaning ring tube 65 .

[0047] The bottom circle of the mesh cone wall 66 is welded to the inner edge of the self-cleaning ring 61, and the inner edge of the self-cleaning ring 61 and the self-cleaning flange ring 64 are connected by a self-cleaning ring connecting rib 63. A self-cleaning ring groove 62 is set between the inner edge of the self-cleaning ring 61 and the self-cleaning flange ring 64, and two adjacent self-cleaning ring grooves 62 are separated by a self-cleaning ring connecting rib 63. Figure 13 shown.

[0048] The bottom foot of the spray tube buckle 53 is fixed on the inner wall of the spray cylinder 55 , and a pair of elastic claws of the spray tube buckle 53 respectively detachably fix the two ends of a spray branch pipe 59 away from the spray tube joint 58 on the inner wall of the spray cylinder 55 .

[0049] As a further improvement, the lower reducing cylinder 40 is composed of a lower cylinder conical surface 44 , a lower cylinder lower flange 43 , and a lower cylinder upper flange 45 .

[0050] As a further improvement: Figure 4 As shown, the suction unit 30 includes a suction cylinder 33, a lower flange 32 of the spray and suction cylinder, and an upper flange 34 of the spray and suction cylinder. One to three inner drooping short tubes 31 and outer drooping suction pipes 35 are tightly fixed on the suction cylinder 33. The inner drooping short tubes 31 and the outer drooping suction pipes 35 are tightly connected, and the outer drooping suction pipes 35 are tightly connected to the hot gas generated by the hot melt and extrusion equipment. The inner end of the inner drooping short tube 31 is provided with a suction port rib 39. The special function of the suction port rib 39 is to guide the trapped oil on the inner wall of the suction cylinder 33 to drip only from the short tube drip edge 37 at the lower end of the suction port rib 39 at any time and cannot flow down into the outer drooping suction pipe 35.

[0051] The advantage of the drooping outer suction pipe 35 is that it provides a smoother overall flow of the intake air. The inner drooping short pipe 31 sacrifices local resistance to effectively prevent trapped oil from flowing back into the high-temperature intake pipe during transient faults such as power outages, potentially causing combustion or explosion. Because during transient faults such as power outages, the hot melt and wire extrusion equipment remains at high temperatures and negative pressure, there is a risk of transient oil backflow.

[0052] As a further improvement: the cone cover unit 20 includes a flat bottom barrel 22, a cone cover 28, a cone cover lower flange 21 and a cone cover upper flange 23. The flat bottom barrel 22 is provided with an inner filter hole 24, which is located in the middle of the flat bottom barrel 22. The cone surface design of the cone cover 28 is convenient for disassembly and cleaning, and can also provide strong support for the upper equipment. Figure 3 shown.

[0053] As a further improvement: the flat bottom filter 10 adopts a multi-ring structure, which is sequentially provided with: a first-level low cylinder 19, a middle circle high cylinder 14, a second-level low cylinder 15 and a filter outer cylinder 11 from the inside to the outside. The filter outer cylinder 11 is provided with a filter drain hole 13 at a low position, a filter overflow hole 18 at a high position, a filter circulation hole 16 at the middle position of the filter outer cylinder 11, an outer cylinder flange 12 at the upper end of the filter outer cylinder 11, and a middle filter hole 17 at the middle position of the middle circle high cylinder 14. Figure 2 shown.

[0054] As a further improvement: the circulating water tank 80 is provided with a water supply inlet pipe 88, a water filter manifold 81 and a spray pipeline 83, a spray booster pump 84 is provided in series on the spray pipeline 83, and the water filter manifold 81 is connected to the filter tank circulation hole 16.

[0055] As a further improvement: a self-cleaning pipeline 82 is provided on the chemical water tank 90 , and a self-cleaning booster pump 87 is provided in series on the self-cleaning pipeline 82 .

[0056] As a further improvement: the upper plane of the outer cylinder flange 12 and the lower plane of the cone cover lower flange 21 are detachably sealed and fixedly connected, and the upper plane of the cone cover upper flange 23 and the lower plane of the ejector and suction cylinder lower flange 32 are detachably sealed and fixedly connected.

[0057] The upper plane of the spray and suction cylinder upper flange 34 and the lower plane of the lower cylinder lower flange 43 are detachably sealed and fixedly connected, and the upper plane of the lower cylinder upper flange 45 and the lower plane of the spray cylinder lower flange 54 are detachably sealed and fixedly connected. Figure 5 shown.

[0058] A self-cleaning flange ring 64 is detachably and tightly fixed between the upper plane of the spray barrel upper flange 56 and the lower plane of the cone cover lower flange 76 . The cone cover upper flange 79 and the upper plane are detachably and tightly fixedly connected to the spray exhaust pipe 89 .

[0059] like Figure 15 and Figure 16 As shown, in the system: the spray exhaust pipe 89 is detachably sealed and fixedly connected to the separator inlet 91, the separator outlet 93 is detachably sealed and fixedly connected to the fan suction port 94, the fan exhaust port 96 is detachably sealed and fixedly connected to the deodorizer suction port 97, and the deodorizer exhaust pipe 99 is detachably sealed and fixedly connected to the high-altitude chimney 100.

[0060] During normal operation, the spray booster pump 84 is turned on, and high-pressure circulating water is injected into the spray main pipe 51 through the spray pipe joint 85 and then distributed to each spray branch pipe 59. After being atomized by the spray umbrella nozzle 57, the water fully covers the entire inner cross-section of the spray cylinder 55; the suction and exhaust fan 95 is started, and the high-temperature harmful gases generated by the waste plastics during the hot melting and extrusion process are captured and continuously sucked in from the external hanging suction pipe 35. When the captured high-temperature harmful gases pass through the spray unit 50, the water mist generated by the spray umbrella nozzle 57 completely intercepts the dust, organic mucus particles in the exhaust gas and condenses them into mixed water droplets and high-humidity gas.

[0061] Most of the mixed water droplets drip directly into the flat-bottomed barrel 22, and a small part of the mixed water droplets drip onto the inner drooping short tube 31 and then drip into the flat-bottomed barrel 22 along the drip edge 37 of the short tube to form mixed sewage. Dust impurities with a greater specific gravity than water in the mixed sewage settle at the bottom of the flat-bottomed barrel 22, and organic mucus particles with a smaller specific gravity than water in the mixed sewage float on the top, achieving primary filtration.

[0062] The primary filtered sewage flows into the first-stage low cylinder 19 through the inner filter hole 24, and the dust impurities with a larger specific gravity are again precipitated at the bottom. The precipitated sewage overflows and flows into the middle circle high cylinder 14. In the middle circle high cylinder 14, the dust impurities with a larger specific gravity continue to be precipitated at the bottom, and the organic mucus particles with a lighter specific gravity float on the top again to achieve secondary filtration.

[0063] The re-filtered sewage flows into the secondary lower cylinder 15 through the middle filter hole 17, and the dust impurities with heavier specific gravity are once again precipitated at the bottom. The re-precipitated sewage overflows and flows into the outer cylinder 11 of the filter tank. In the outer cylinder 11 of the filter tank, the dust impurities with heavier specific gravity are completely precipitated at the bottom, and the organic mucus particles with lighter specific gravity float on the top once. After three filtrations, the circulating water comes out from the circulation hole 16 of the filter tank and is collected into the circulating water tank 80 through the filtered water manifold 81.

[0064] The high-humidity gas continues to rise and is mechanically intercepted at the mesh cone wall 66. Most of the oil particles are intercepted at the mesh cone wall 66. After interception, it becomes odorous humid gas and is sucked into the water vapor separator 92 through the spray exhaust pipe 89 to separate the steam and water into pure odorous gas. The pure odorous gas receives the final odor removal treatment in the activated carbon deodorizer 98 and is harmlessly discharged through the high-altitude chimney 100.

[0065] During the regular decontamination and self-cleaning cleaning work, the self-cleaning booster pump 87 is turned on, and the high-pressure cleaning liquid containing the cleaning agent is injected into the self-cleaning ring pipe 65 through the self-cleaning spiral pipe head 86. The high-speed jet of cleaning liquid from the spray nozzle 67 washes away the dirt adhering to the mesh cone wall 66; the washed dirty liquid flows directly into the flat-bottomed barrel 22 through the wall guide ring 52 without contaminating the inner wall of the spray cylinder 55 again, and self-cleaning can be achieved without removing the pipeline equipment.

[0066] The self-cleaning unit 60 includes a self-cleaning ring tube 65, a mesh cone wall 66 and a self-cleaning cone cover 70. The center end of the self-cleaning ring tube 65 is sealed, and the outer ring end of the self-cleaning ring tube 65 is detachably and tightly fastened to the self-cleaning spiral tube head 86 through a self-cleaning pipe joint 68 of any structure; a spray nozzle 67 with an equivalent diameter of 0.5 to 0.9 mm is set every 5 to 9 cm on the ring line of the self-cleaning ring tube 65, and the outlet of the spray nozzle 67 is vertically upward. 3 to 5 self-cleaning buckles 69 are set on each ring of the self-cleaning ring tube 65, and the bottom foot of the self-cleaning buckle 69 is fixed on the inner wall of the mesh cone wall 66. The elastic claws of the self-cleaning buckle 69 detachably fix the self-cleaning ring tube 65.

Claims

1. A self-cleaning spray filter, characterized in that: It includes a flat bottom filter tank, a cone cover unit, an air suction unit, a lower reducer and a self-cleaning cone cover; The lower reducer is composed of a lower cone surface, a lower flange and an upper flange. A spray unit and a self-cleaning unit are provided inside the lower reducer and the self-cleaning cone cover. The spray unit includes a spray cylinder, a lower flange of the spray cylinder, and an upper flange of the spray cylinder. A spray spiral tube head and a self-cleaning spiral tube head are provided on the wall of the spray cylinder. The self-cleaning spiral tube head is located at a high position of the spray spiral tube head. A wall guide ring is also provided on the inner wall above the self-cleaning spiral tube head. One end of the spray main pipe is sealed by a plugging head, and the other end of the spray main pipe is detachably and tightly fastened to the spray spiral tube head through a spray pipe joint of any structure. A spray branch pipe is provided on the bottom surface of the spray main pipe. The self-cleaning unit includes a self-cleaning ring tube, a mesh cone wall and a self-cleaning cone cover. The center end of the self-cleaning ring tube is sealed, and the outer ring end of the self-cleaning ring tube is detachably and tightly fastened to the self-cleaning spiral tube head through a self-cleaning pipe joint of any structure; a spray nozzle is arranged at intervals on the ring line of the self-cleaning ring tube, and the spray nozzle outlet is vertically upward; a self-cleaning buckle is provided on each ring of the self-cleaning ring tube, and the self-cleaning buckle base is fixed to the inner wall of the mesh cone wall, and the self-cleaning buckle elastic claw detachably fixes the self-cleaning ring tube; The suction unit includes a suction cylinder, a lower flange of the ejector and suction cylinder, and an upper flange of the ejector and suction cylinder. One to three inner drooping short tubes and an outer drooping suction pipe are sealed and fixed on the suction cylinder. The inner drooping short tubes and the outer drooping suction pipes are sealed and connected. The inner end of the inner drooping short tube is provided with a suction port rib. The cone cover unit includes a flat bottom barrel, a cone upper cover, a cone cover lower flange and a cone cover upper flange. An inner filter hole is opened on the wall of the flat bottom barrel, and the inner filter hole is located in the middle of the height of the flat bottom barrel. The flat bottom filter adopts a multi-ring structure, and is sequentially provided with a first-level low cylinder, a middle-circle high cylinder, a second-level low cylinder and a filter outer cylinder from the inside to the outside. The filter outer cylinder is provided with a filter drain hole at a low position, a filter overflow hole at a high position, a filter circulation hole at a middle position of the filter outer cylinder, an outer cylinder flange at the upper end of the filter outer cylinder, and a middle filter hole at a middle position of the middle-circle high cylinder. The bottom ring of the mesh cone wall is welded to the inner edge of the self-cleaning ring, the inner edge of the self-cleaning ring and the self-cleaning flange ring are connected by a self-cleaning ring connecting rib, a self-cleaning ring hole groove is provided between the inner edge of the self-cleaning ring and the self-cleaning flange ring, and two adjacent self-cleaning ring hole grooves are separated by a self-cleaning ring connecting rib; the self-cleaning flange ring is detachably and tightly fixed between the upper plane of the spray barrel upper flange and the lower plane of the cone cover lower flange.

2. A self-cleaning spray filter according to claim 1, characterized in that: The spray pipe buckle base in the spray unit is fixed on the inner wall of the spray cylinder, and a pair of spray pipe buckle elastic claws respectively detachably fix the two ends of a spray branch pipe away from the spray pipe joint on the inner wall of the spray cylinder.

3. A self-cleaning spray filter according to claim 1, characterized in that: The upper plane of the outer cylinder flange and the lower plane of the cone cover lower flange are detachably sealed and fixedly connected, and the upper plane of the cone cover upper flange and the lower plane of the ejector and suction cylinder lower flange are detachably sealed and fixedly connected.

4. A self-cleaning spray filter according to claim 1, characterized in that: The wall guide ring guides the sewage generated during the self-cleaning process to drip along the dripping edge of the guide ring.

5. A self-cleaning spray filter according to claim 1, characterized in that: The upper plane of the spray and suction cylinder upper flange and the lower plane of the lower cylinder lower flange are detachably sealed and fixedly connected, and the upper plane of the lower cylinder upper flange and the lower plane of the spray cylinder lower flange are detachably sealed and fixedly connected.

6. A self-cleaning spray filter according to claim 1, characterized in that: The upper plane of the cone cover upper flange is detachably and tightly fixedly connected to the spray exhaust pipe.

7. A self-cleaning spray filter according to claim 1, characterized in that: The suction port rib guides any oil residue trapped on the inner wall of the suction cylinder to drip from the short pipe dripping edge at the lower end of the suction port rib.

8. A self-cleaning spray filter according to any one of claims 1 to 7, characterized in that: The circulating water tank is also provided with a water supply inlet pipe, a water filter header and a spray pipeline, a spray booster pump is connected in series on the spray pipeline, and the water filter header is connected to the filter tank circulation hole.

9. A self-cleaning spray filter according to any one of claims 1 to 7, characterized in that: The invention also includes a self-cleaning pipeline arranged on the chemical water tank, and a self-cleaning booster pump is arranged in series on the self-cleaning pipeline.

Images