Rapid high-gravity field kitchen oil-water separation system

Abstract

The invention discloses a rapid super-gravity field kitchen oil-water separation system which comprises a front coarse residue filtering and separating unit, a solid-liquid deep separation unit, a multi-stage oil-water fine filtering unit and an oil-water deep separation unit, the separation of oil and water and large-particle-size solid particles in the kitchen waste is realized in the front coarse residue filtering and separating unit; kitchen oil and water are separated from small-particle-size solid particles through the Y-shaped filter; separation of kitchen oil water and suspended matters in water is realized through a solid-liquid cyclone separator in the solid-liquid deep separation unit; deep separation of grease and water is achieved through rotational flow oil-water separators with different precisions in the multistage oil-water fine filtering unit, and rotational flow guide vanes are arranged in the rotational flow oil-water separators and used for improving the rotational flow field intensity and improving the oil-water separation efficiency; and finally, deep separation of grease and water is realized in the oil-water deep separation unit. According to the system, through combination of a plurality of units, the oil-water separation speed and the oil-water separation efficiency are effectively improved.

Description

Technical Field

[0001] The invention relates to the technical field of oil-water separation, and in particular to a rapid high-gravity field kitchen oil-water separation system. Background Art

[0002] As a country with a large population, China has a huge demand for the catering industry. If the large amount of food waste generated every day is not handled in time, it will seriously affect people's daily life. Most of the existing oil-water separation equipment works based on the pure physical principle of gravity (density difference), that is, the substances with a larger specific gravity in the sewage sink to the bottom of the separator, and the substances with a smaller specific gravity (such as animal fats) float to the surface of the water. The cleaned sewage is discharged into the sewer through the drain. This product produced by relying on the pure gravity field principle has a slow separation speed and low efficiency. When multiple food waste discharge outlets discharge food waste at the same time, it may exceed the system load, resulting in the incompletely separated oil phase, water phase, and waste residue being discharged into the collection bucket, polluting the separation liquid, and the system stability is poor.

[0003] Therefore, it is necessary to develop a more efficient food waste oil-water separation system to significantly improve the speed and efficiency of food waste treatment and the stability of the oil-water separation system. Summary of the invention

[0004] In order to solve the deficiencies in the prior art, the present application proposes a rapid super-gravity field kitchen oil-water separation system, which includes pre-coarse residue filtration separation, solid-liquid deep separation, multi-stage oil-water fine filtration and oil-water deep separation units, thereby constituting a rapid super-gravity field formed by a centrifugal field, a gravity field and an electric field, which can achieve deep dehydration and effectively improve the oil-water separation speed and high oil-water separation efficiency.

[0005] The technical solution adopted by the present invention is as follows:

[0006] A rapid supergravity field kitchen oil-water separation system, comprising a pre-coarse residue filtering and separation unit, a solid-liquid depth separation unit, a multi-stage oil-water fine filtering unit, and an oil-water depth separation unit;

[0007] The pre-coarse residue filtering and separation unit comprises a pre-coarse residue filter and a Y-type filter, wherein the pre-coarse residue filter has a built-in agitator and a pre-coarse residue filter screen; under the action of the agitator, the centrifugal action is used to achieve the preliminary separation of solid waste and liquid waste; a pre-coarse residue filter liquid storage chamber is separated between the pre-coarse residue filter screen and the inner wall surface of the pre-coarse residue filter cylinder, and the pre-coarse residue filter liquid storage chamber inputs the preliminarily filtered liquid waste into the Y-type filter through the pre-coarse residue filter discharge pipe;

[0008] The solid-liquid deep separation unit comprises a solid-liquid cyclone separator and a booster pump, wherein the booster pump is arranged on the connecting pipeline between the Y-type filter and the solid-liquid cyclone separator, and the liquid waste filtered by the Y-type filter is pumped into the solid-liquid cyclone separator, and the solid-liquid cyclone separator performs solid-liquid cyclone separation on the liquid waste again;

[0009] The multi-stage oil-water fine filtration unit comprises a primary oil-water cyclone separator and a secondary oil-water cyclone separator, wherein the primary oil-water cyclone separator adopts a double-cone cyclone, and the secondary oil-water cyclone separator adopts a single-cone cyclone; the inlet end of the primary oil-water cyclone separator is connected to the liquid phase outlet of the solid-liquid cyclone separator; the oil phase outlet of the primary oil-water cyclone separator is connected to the oil-water depth separation unit, and the water phase outlet of the primary oil-water cyclone separator is connected to the inlet end or the water collecting bucket of the secondary oil-water cyclone separator; the oil phase outlet of the secondary oil-water cyclone separator is connected to the oil-water depth separation unit, and the water phase outlet of the secondary oil-water cyclone separator is connected to the water collecting bucket;

[0010] The oil-water deep separation unit comprises a gravity separator / electric dehydrator, wherein the gravity separator / electric dehydrator has built-in electrodes and utilizes an electric field to purify oil.

[0011] Furthermore, the solid-liquid cyclone separator comprises a solid-liquid cyclone separator cylindrical section, a solid-liquid cyclone separator conical section, and a solid-liquid cyclone separator underflow pipe which are connected in sequence, and the three are arranged along the same center line; the side wall of the solid-liquid cyclone separator cylindrical section is connected to the solid-liquid cyclone separator inlet pipe, one end of the solid-liquid cyclone separator inlet pipe is arranged along the tangent direction of the solid-liquid cyclone separator cylindrical section, and the other end is connected to the outlet pipeline of the booster pump; a solid-liquid cyclone separator overflow pipe is arranged at the end of the solid-liquid cyclone separator cylindrical section, one end of the solid-liquid cyclone separator overflow pipe extends to the interior of the solid-liquid cyclone separator cylindrical section and is arranged along the same center line, and the other end is located outside the solid-liquid cyclone separator cylindrical section.

[0012] Furthermore, the first-stage oil-water cyclone separator comprises a cyclone oil-water separator cylindrical section, a cyclone oil-water separator short cone tube, a cyclone oil-water separator long cone tube, and a cyclone oil-water separator bottom flow pipe which are connected in sequence, and the four are arranged along the same center line; the cyclone oil-water separator inlet pipe is connected to the side wall of the cyclone oil-water separator cylindrical section, one end of the cyclone oil-water separator inlet pipe is arranged along the tangent direction of the cyclone oil-water separator cylindrical section, and the other end is connected to the solid-liquid cyclone separator overflow pipe; a cyclone conductor is axially arranged in the cyclone oil-water separator cylindrical section, and a cyclone oil-water separator rotating guide vane is arranged on the outer wall of the cyclone conductor, and the cyclone oil-water separator rotating guide vane divides the flow channel between the cyclone conductor and the inner wall of the cyclone oil-water separator cylindrical section into a spiral flow channel.

[0013] Furthermore, a gravity separator / electric dehydrator baffle is arranged at the upper part of the cavity near the gravity separator / electric dehydrator inlet pipe side, and the gravity separator / electric dehydrator baffle separates the inlet pipe connection and the gravity separator / electric dehydrator baffle into a gravity separator / electric dehydrator buffer chamber; a gravity separator / electric dehydrator purified grease discharge pipe is arranged at one end of the gravity separator / electric dehydrator; and a gravity separator / electric dehydrator purified grease discharge pipe is arranged at the bottom of the cavity near the gravity separator / electric dehydrator purified grease discharge pipe side. A gravity separator / electric dehydrator oil-water weir is arranged at the part, and the gravity separator / electric dehydrator oil-water weir separates the connection between the gravity separator / electric dehydrator purified grease discharge pipeline and the gravity separator / electric dehydrator oil-water weir into a gravity separator / electric dehydrator oil storage chamber; the communication area between the gravity separator / electric dehydrator baffle and the gravity separator / electric dehydrator oil-water weir is the gravity separator / electric dehydrator oil-water separation chamber, and the electrode is arranged in the gravity separator / electric dehydrator oil-water separation chamber.

[0014] Furthermore, the electrode is composed of a plurality of "V"-shaped electrode plates, and the positive and negative poles of adjacent "V"-shaped electrode plates are arranged alternately; the opening side of the "V"-shaped electrode plate faces the liquid inlet end, and the tip of the "V"-shaped electrode plate faces the liquid outlet end.

[0015] Furthermore, rectangular holes arranged in an array are provided on the "V"-shaped electrode plate, and the size of the rectangular holes gradually decreases from bottom to top.

[0016] Furthermore, the solid-liquid cyclone separator, the first-stage oil-water cyclone separator, and the second-stage oil-water cyclone separator are in the form of a single or multiple parallel connections to meet the requirements of different processing speeds.

[0017] Furthermore, the pre-coarse residue filtering and separation unit, the solid-liquid depth separation unit, the multi-stage oil-water fine filtering unit, and the oil-water depth separation unit are equipped with heaters to prevent the kitchen oil and water from solidifying at low temperatures.

[0018] Furthermore, the pre-coarse residue filter screen is equipped with a pre-coarse residue filter backwashing pipeline, and the pre-coarse residue filter backwashing pipeline pumps high-pressure water to wash the pre-coarse residue filter screen.

[0019] Furthermore, the agitator includes three or more secondary agitating shafts, and each secondary agitating shaft is provided with four blades along the axial direction.

[0020] Beneficial effects of the present invention:

[0021] 1. The present invention can separate the cooking oil and water from the large-size solid particles in the kitchen waste by using the pre-coarse residue filter.

[0022] 2. The stirrer, heater and temperature measuring element carried by the pre-coarse residue filter in the present invention can work together to achieve the shedding of grease adsorbed by solid particles and avoid the solidification of animal fats.

[0023] 3. The present invention can remove small-sized solid particles in cooking oil and water through the Y-type filter.

[0024] 4. The present invention can remove suspended matter in cooking oil water through a solid-liquid cyclone separator.

[0025] 5. The present invention uses a two-stage cyclone oil-water separator and utilizes the supergravity field generated by the cyclone field to greatly accelerate the oil-water separation speed and improve the efficiency of kitchen oil-water treatment.

[0026] 6. The present invention uses a gravity separator / electric dehydrator to deeply dehydrate the cooking oil and water, which can greatly reduce the water content in the purified oil.

[0027] 7. The present invention further filters the bottom flow of the oil-water cyclone separator and the wastewater separated by the gravity separator / electric dehydrator through a fine filter, so that the discharged wastewater can meet the discharge standards;.

[0028] 8. The pressure gauge, flow meter, temperature measuring element and other instruments in the present invention can output electrical signals, and the valves, motors and heaters can be controlled by electronic components to achieve automatic control of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a front view of a rapid supergravity field kitchen oil-water separation system of the present invention.

[0030] Figure 2 It is a top view of a rapid hypergravity field kitchen oil-water separation system of the present invention.

[0031] Figure 3 It is an axonometric diagram of a rapid hypergravity field kitchen oil-water separation system of the present invention.

[0032] Figure 4 This is the front view of the pre-coarse slag filter structure.

[0033] Figure 5 It is a top view of the pre-coarse slag filter structure.

[0034] Figure 6 It is a cross-sectional view of the structure of the pre-coarse slag filter.

[0035] Figure 7 This is the front view of the solid-liquid cyclone separator.

[0036] Figure 8 It is a cross-sectional view of a solid-liquid cyclone separator.

[0037] Fig. 9This is the front view of the first-stage cyclone oil-water separator.

[0038] Fig.10 This is a cross-sectional view of a first-stage cyclone oil-water separator.

[0039] Fig.11 This is the structural diagram of the swirl guide vane.

[0040] Fig.12 This is the front view of the secondary cyclone oil-water separator.

[0041] Fig.13 It is a partial cross-sectional view of a gravity separator / electric dehydrator from above.

[0042] Fig.14 It is the front cross-sectional view of the gravity separator / electric dehydrator.

[0043] Fig.15 It is a left side cross-sectional view of a gravity separator / electric dehydrator.

[0044] Fig.16 It is the main view of the system for large processing volume.

[0045] Fig.17 This is a top view of the system for large processing volumes.

[0046] In the figure: 110, pre-coarse residue filter, 111, pre-coarse residue filter inlet pipe, 112, pre-coarse residue filter discharge pipe, 113, pre-coarse residue filter backwash pipe, 114, pre-coarse residue filter discharge pipe, 115, pre-coarse residue filter sewage pipe, 116, pre-coarse residue filter baffle, 117, pre-coarse residue filter filter screen, 118, heater, 119, temperature measuring element, 120, agitator, 121, flap level gauge, 122, pre-coarse residue filter cover, 123, pre-coarse residue filter buffer chamber, 124, pre-coarse residue filter solid-liquid separation chamber, 125, pre-coarse residue filter liquid storage chamber, 131, valve A, 132, valve B, 133, valve C, 1 34. Valve D, 135. Valve E, 141. Pressure gauge A, 142. Pressure gauge B, 151. Flow meter A, 161. Slag discharge bucket, 171. Y-type filter, 210. Booster pump, 220. Solid-liquid cyclone separator, 221. Solid-liquid cyclone separator cylindrical section, 222. Solid-liquid cyclone separator inlet pipe, 223. Solid-liquid cyclone separator overflow pipe, 224. Solid-liquid cyclone separator underflow pipe, 225. Solid-liquid cyclone separator cone section, 231. Valve F, 232. Valve G, 233. Valve H, 234. Valve I, 235. Valve J, 241. Pressure gauge C, 242. Pressure gauge D, 243. Pressure gauge E, 251. Flow meter B, 252. Flow meter C , 253, flow meter D, 261, collection barrel, 310, primary oil-water cyclone separator, 311, cyclone oil-water separator cylindrical section, 312, cyclone oil-water separator short cone tube, 313, cyclone oil-water separator long cone tube, 314, cyclone oil-water separator bottom flow pipeline, 315, cyclone oil-water separator inlet pipeline, 316, cyclone oil-water separator external overflow pipeline, 317, cyclone oil-water separator rotating guide vane, 318, cyclone oil-water separator internal overflow pipeline, 320, secondary oil-water cyclone separator, 331, valve K, 332, valve L, 333, valve M, 334, valve N, 335, valve O, 341, pressure gauge F, 342, pressure gauge G, 343, pressure gauge H, 344, Pressure gauge I, 345, pressure gauge J, 351, flow meter E, 352, flow meter F, 353, flow meter G, 354, flow meter H, 361, water collection bucket A, 371, fine filter A, 401, "V" shaped electrode positive electrode connecting column, 402, "V" shaped electrode negative electrode connecting column, 403, "V" shaped electrode positive electrode, 404, "V" shaped electrode negative electrode, 405, "V" shaped electrode hanging column, 410, gravity separator / electric dehydrator, 411, gravity separator / electric dehydrator inlet pipe A, 412, gravity separator / electric dehydrator inlet pipe B, 413, gravity separator / electric dehydrator separated wastewater discharge pipe, 414, gravity separator / electric dehydrator purified grease discharge pipe,415. Gravity separator / electric dehydrator baffle, 416. Gravity separator / electric dehydrator oil-water weir, 417. Gravity separator / electric dehydrator buffer chamber, 418. Gravity separator / electric dehydrator oil-water separation chamber, 419. Gravity separator / electric dehydrator oil storage chamber, 421. Valve P, 422. Valve Q, 431. Pressure gauge K, 432. Pressure gauge L, 441. Flow meter I, 442. Flow meter J, 451. Water collection bucket B, 452. Oil collection bucket, 461. Fine filter B. , DETAILED DESCRIPTION

[0047] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0048] In the description of the present invention, it should be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "inside", "outside" and the like indicating the orientation or positional relationship are for simplified description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features.

[0049] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0050] Combined with Figure 1-17 The invention discloses a rapid high-gravity field kitchen oil-water separation system, which includes a pre-coarse residue filtration and separation unit, a solid-liquid depth separation unit, a multi-stage oil-water fine filtration unit, an oil-water depth separation unit, and supporting pipelines, valves, and instruments. The units and their connection relationships are as follows:

[0051] The pre-coarse residue filtering and separation unit includes a pre-coarse residue filter 110, a Y-type filter 171, and matching pipes, valves, pressure gauges, and flow meters. The specific structure and connection relationship are as follows: Figure 4-6As shown, the main body of the pre-coarse residue filter 110 is cylindrical, and the bottom of the cylinder is a tapered cone. The upper part of the pre-coarse residue filter cylinder is provided with a pre-coarse residue filter cover plate 122, and the pre-coarse residue filter cover plate 122 and the pre-coarse residue filter cylinder can be connected by a spiral structure or other connection methods. The pre-coarse residue filter cylinder is provided with a pre-coarse residue filter inlet pipe 111 and a pre-coarse residue filter discharge pipe 112; a pre-coarse residue filter baffle 116, a pre-coarse residue filter screen 117, and an agitator 120 are arranged inside the pre-coarse residue filter cylinder. The conical part at the bottom of the pre-coarse residue filter 110 is connected to the pre-coarse residue filter discharge pipe 114, and the large-size solid particles gathered along the conical cylinder wall under the action of gravity are discharged.

[0052] More specifically, in this embodiment, the pre-coarse residue filter inlet pipe 111 is arranged on the upper side wall of the pre-coarse residue filter cylinder, and the pre-coarse residue filter baffle 116 inside the pre-coarse residue filter cylinder is opposite to the inlet of the pre-coarse residue filter inlet pipe 111, and the pre-coarse residue filter buffer chamber 123 is separated by the pre-coarse residue filter baffle 116 at the wall surface where the inlet of the pre-coarse residue filter inlet pipe 111 is located.

[0053] A pre-coarse residue filter liquid storage chamber 125 is separated between the pre-coarse residue filter screen 117 and the inner wall surface of the pre-coarse residue filter cylinder, and the pre-coarse residue filter discharge pipe 112 is connected to the pre-coarse residue filter liquid storage chamber 125 to discharge the liquid waste preliminarily filtered by the pre-coarse residue filter screen 117 from the pre-coarse residue filter 110.

[0054] The pre-coarse residue filter solid-liquid separation chamber 124 is located between the pre-coarse residue filter screen 117 and the pre-coarse residue filter buffer chamber 123; the agitator 120 is located in the pre-coarse residue filter solid-liquid separation chamber 124, and the mixed solid and liquid food waste in the solid-liquid separation chamber 124 of the coarse residue filter is stirred by the agitator 120, and the preliminary separation of solid waste and liquid waste is achieved by centrifugal action.

[0055] The outlet of the pre-coarse residue filter discharge pipe 112 is connected to a Y-type filter 171, and the Y-type filter 171 is used to remove small-size solid particles in the liquid waste again.

[0056] More preferably, the upper part of the pre-coarse residue filter screen 117 is provided with filter holes, and a section of height is reserved near the bottom of the cylinder without filter holes, so as to prevent the viscous slurry in the solid waste separated at the bottom of the pre-coarse residue filter 117 from entering the pre-coarse residue filter liquid storage chamber 125 through the filter holes, thereby reducing the filtering effect.

[0057] More preferably, the valves and instruments used in the pre-separation unit are as follows: a valve A131 is installed on the pre-coarse residue filter inlet pipe 111, a valve C133 and a pressure gauge A141 are installed on the pre-coarse residue filter discharge pipe 112, and the outlet of the pre-coarse residue filter discharge pipe 114 is connected to the discharge bucket 161 through a pipe and a valve E135, and a pressure gauge B142 is also provided on the pipe.

[0058] More preferably, in the pre-coarse residue filter liquid storage chamber 125, a pre-coarse residue filter backwashing pipe 113 is arranged toward the pre-coarse residue filter screen 117. When the pre-coarse residue filter screen 117 is blocked, the pre-coarse residue filter backwashing pipe 113 can be used to pump high-pressure water to flush the pre-coarse residue filter screen 117. At the same time, in order to remove the solid precipitation generated after flushing, a pre-coarse residue filter sewage pipe 115 is arranged at the bottom of the pre-coarse residue filter liquid storage chamber 125; a valve D 134 is arranged on the pre-coarse residue filter sewage pipe 115, and a valve B 132 is arranged on the pre-coarse residue filter backwashing pipe 113.

[0059] More preferably, a heater 118 and a temperature measuring element 119 are provided in the solid-liquid separation chamber 124 of the pre-coarse residue filter. The heater 118 can be used to heat the kitchen oil and water in the solid-liquid separation chamber 124 of the pre-coarse residue filter to prevent solidification at low temperatures. At the same time, the temperature measuring element 119 can be used to detect the temperature information in the solid-liquid separation chamber 124 of the pre-coarse residue filter. According to the different physical properties of the kitchen oil and water, the temperature of the kitchen waste is measured by the temperature measuring element 119, and compared with the preset temperature, the power of the heater 118 is adjusted to control the temperature of the kitchen waste, thereby preventing the solidification of the oil and fat and reducing unnecessary energy consumption.

[0060] More preferably, a flap level gauge 121 is provided in the solid-liquid separation chamber 124 of the pre-coarse residue filter.

[0061] More preferably, a sealing structure is provided between the pre-coarse residue filter cover plate 122 and the pre-coarse residue filter cylinder and the pre-coarse residue filter screen 117 .

[0062] More preferably, the agitator 120 includes three secondary stirring shafts with an angle of 120°, and each secondary stirring shaft is provided with four blades along the axial direction. The inner side of the blades is shorter and the outer side is longer, thereby ensuring that no large-sized solid particles are stuck between the blades while maintaining a larger stirring range and improving the stirring effect.

[0063] The solid-liquid deep separation unit includes a booster pump 210, a solid-liquid cyclone separator 220, and matching pipes, valves, pressure gauges, and flow meters. The inlet of the booster pump 210 is connected to the Y-type filter 171 through a pipeline, and the outlet of the booster pump 210 is connected to the solid-liquid cyclone separator 220 through a pipeline, and the liquid waste filtered by the Y-type filter 171 is pumped into the solid-liquid cyclone separator 220.

[0064] The structure of the solid-liquid cyclone separator 220 is as follows: Figure 7 , 8 As shown, it includes a solid-liquid cyclone separator cylindrical section 221, a solid-liquid cyclone separator cone section 225, and a solid-liquid cyclone separator underflow pipe 224 which are connected in sequence, and the three are arranged along the same center line. The side wall of the solid-liquid cyclone separator cylindrical section 221 is connected to a solid-liquid cyclone separator inlet pipe 222, one end of the solid-liquid cyclone separator inlet pipe 222 is arranged along the tangent direction of the solid-liquid cyclone separator cylindrical section 221 (eccentric connection), and the other end of the solid-liquid cyclone separator inlet pipe 222 is connected to the outlet pipeline of the booster pump 210, and the solid-liquid cyclone separator inlet pipe 222 inputs the liquid waste into the solid-liquid cyclone separator 220 along the tangent direction, and generates a cyclone.

[0065] A solid-liquid cyclone separator overflow pipe 223 is arranged at the end of the solid-liquid cyclone separator cylindrical section 221, one end of the solid-liquid cyclone separator overflow pipe 223 extends to the interior of the solid-liquid cyclone separator cylindrical section 221 and is arranged along the same center line, and the other end is located outside the solid-liquid cyclone separator cylindrical section 221.

[0066] The end of the solid-liquid cyclone separator underflow pipeline 224 is connected to the collection barrel 261 through a pipeline.

[0067] The working principle of the solid-liquid cyclone separator 220 is as follows: liquid waste is tangentially input into the solid-liquid cyclone separator 220 through the solid-liquid cyclone separator inlet pipe 222. Under the supergravity field formed by the cyclone field, since the density of the solid suspended matter is different from that of the liquid phase, the solid suspended matter is gathered and discharged at the bottom flow pipe 224 of the solid-liquid cyclone separator, and the cooking oil and water are gathered and discharged at the overflow pipe 223 of the solid-liquid cyclone separator.

[0068] More preferably, the solid-liquid cyclone separator 220 can be designed according to the following empirical formula. First, the diameter of the cylindrical section is selected according to the following empirical formula:

[0069]

[0070] in, is the diameter of the cylindrical segment, Q i is the flow rate, ρ is the liquid (water) density, n p , Kp All are proportional amplification systems, μ is the liquid viscosity, and ΔP is the pressure drop.

[0071] Based on the diameter of the cylindrical section, the height of the cylindrical section l1 = (0.7 ~ 2.0) D, the hydraulic diameter of the inlet d i =(0.13~0.29)D, overflow pipe diameter d0 =(1~2)d i , overflow pipe insertion depth l0 = (0.2 ~ 1) D, underflow pipe diameter d u =(0.1~0.2)D, cone angle θ=20°~120°.

[0072] More preferably, the valves and meters used in the solid-liquid deep separation unit include: valve F 231, pressure gauge C 241, flow meter B 251, valve G 232, valve H 233 are sequentially arranged on the outlet pipeline of the booster pump 210. Pressure gauge E 243, valve J 235, flow meter D 253 are arranged on the outlet pipeline of the overflow pipeline 223 of the solid-liquid cyclone separator. Pressure gauge D 242, valve I 234, flow meter C 252 are arranged at the outlet of the underflow pipeline 224 of the solid-liquid cyclone separator.

[0073] More preferably, the solid-liquid deep separation unit may be composed of a plurality of parallel solid-liquid cyclone separators 220 to increase the processing capacity.

[0074] The multi-stage oil-water fine filtration unit includes at least a first-stage oil-water cyclone separator 310 and supporting pipes, valves, pressure gauges, and flow meters. The structure of the first-stage oil-water cyclone separator 310 is as follows: Figure 9-11 As shown, it includes a cyclone oil-water separator cylindrical section 311, a cyclone oil-water separator short cone tube 312, a cyclone oil-water separator long cone tube 313, and a cyclone oil-water separator underflow pipe 314, which are connected in sequence, and the four are arranged along the same center line. A cyclone oil-water separator inlet pipe 315 is connected to the side wall of the cyclone oil-water separator cylindrical section 311, one end of the cyclone oil-water separator inlet pipe 315 is arranged along the tangent direction of the cyclone oil-water separator cylindrical section 311 (eccentric connection), and the other end of the cyclone oil-water separator inlet pipe 315 is connected to the solid-liquid cyclone separator overflow pipe 223, and the cyclone oil-water separator inlet pipe 315 inputs the kitchen oil and water discharged from the solid-liquid cyclone separator overflow pipe 223 into the cyclone oil-water separator cylindrical section 311 along the tangent direction.

[0075] A swirl conductor is axially arranged in the cylindrical section 311 of the swirl oil-water separator, and a swirl oil-water separator rotating guide vane 317 is arranged on the outer wall of the swirl conductor. Therefore, the swirl oil-water separator rotating guide vane 317 divides the flow channel between the swirl conductor and the inner wall of the cylindrical section 311 of the swirl oil-water separator into a spiral flow channel to enhance the swirl field strength of the kitchen oil and water and improve the oil-water separation efficiency.

[0076] An external overflow pipe 316 of the cyclone oil-water separator is axially arranged in the cylindrical section 311 of the cyclone oil-water separator. One end of the external overflow pipe 316 passes through the cyclone conductor and extends into the cylindrical section 311 of the cyclone oil-water separator, and the other end passes through the end surface of the cylindrical section 311 of the cyclone oil-water separator.

[0077] The kitchen oil and water input into the cyclone oil-water separator inlet pipe 315 is under the action of the supergravity field generated by the spiral flow channel. Because of the different densities of oil and water, water is gathered and discharged at the bottom flow pipe 314 of the cyclone oil-water separator, and oil is gathered and discharged at the overflow pipe 318 inside the cyclone oil-water separator.

[0078] More preferably, the swirl guide vane includes four guide vanes, the blade root of the swirl guide vane is connected to the outer wall surface of the overflow pipe in the swirl oil-water separator to fix the swirl guide vane, and the blade tip of the swirl guide vane contacts the inner wall surface of the cylindrical section of the swirl oil-water separator. The swirl guide vane is designed by geometric method, using arc orthogonal blades, and the directrix is ​​composed of arc lines and straight line segments to form a tapered flow channel to achieve fluid acceleration.

[0079] The root directrix equation of the swirl guide vane is:

[0080]

[0081] The swirl guide vane tip directrix equation is:

[0082]

[0083] Wherein, (x, y) is the coordinate of the root / tip directrix of the swirl guide vane in the plane rectangular coordinate system, ρ is the radius of the arc segment of the circular swirl guide vane root directrix, (x0, y0) is the coordinate of the intersection of the circular arc segment and the straight line segment of the swirl guide vane root directrix, β1 is the angle between the straight line segment of the swirl guide vane root directrix and the positive direction of the x-axis, K1 is the reciprocal of the slope of the straight line segment of the swirl guide vane root directrix, R1 is the root diameter of the swirl guide vane, and R2 is the tip diameter of the swirl guide vane.

[0084] More preferably, the outlet end of the underflow pipe 314 of the cyclone oil-water separator is connected to the fine filter A371 and the water collecting bucket A361 in sequence through a pipe. The fine filter A371 can be used to filter small-sized solid particles and suspended matter in the water from the wastewater discharged from the underflow pipe 314 of the cyclone oil-water separator again, so that the discharged wastewater meets the discharge standards, and then is input into the water collecting bucket A361 for storage.

[0085] More preferably, the pipelines, valves and meters supporting the oil-water cyclone separator specifically include: a pressure gauge G 342 and a valve L 332 are installed on the outlet pipe of the underflow pipe 314 of the cyclone oil-water separator, a fine filter A 371, a flow meter E 351 and a water collecting bucket A 361 are installed on the connected discharge pipe, and a pressure gauge I 344, a valve O 335 and a flow meter H 354 are installed on the outlet pipe of the overflow pipe 316 outside the cyclone oil-water separator.

[0086] More preferably, the overflow pipe of the cyclone oil-water separator is divided into an inner overflow pipe 318 of the cyclone oil-water separator and an outer overflow pipe 316 of the cyclone oil-water separator, wherein the inner diameter of the outer overflow pipe of the cyclone oil-water separator is larger than the inner diameter of the inner overflow pipe of the cyclone oil-water separator, and the inner overflow pipe of the cyclone oil-water separator is detachably connected to the cyclone conductor, so as to replace the inner overflow pipe of the cyclone oil-water separator and change the inner diameter of the inner overflow pipe of the cyclone oil-water separator to adapt to different working conditions. The top cover plate of the cylindrical section 311 of the cyclone oil-water separator is detachably connected to the side wall of the cylindrical section 311 of the cyclone oil-water separator, so as to be able to replace different cyclone guide vanes according to different needs.

[0087] More preferably, when the physical properties of oil are relatively complex, it is not possible to obtain both overflow with low water content and underflow with low oil content through a single-stage oil-water cyclone separator; therefore, it is necessary to process the oil-water cyclone separators with different processing accuracies step by step to obtain a better separation effect. Figure 1-3 The primary oil-water cyclone separator 310 and the secondary oil-water cyclone separator 320 are designed to be connected in series, and the wastewater separated by the primary oil-water cyclone separator 310 is subjected to cyclone separation again by the secondary oil-water cyclone separator 320. Therefore, the cyclone oil-water separator underflow pipe 314 of the primary oil-water cyclone separator 310 is connected to the cyclone oil-water separator inlet pipe 315 of the secondary oil-water cyclone separator 320, and the wastewater is subjected to cyclone separation again by the secondary oil-water cyclone separator 320. The specific connection relationship is as follows: the cyclone oil-water separator underflow pipe 314 of all primary oil-water cyclone separators 310 is connected to the cyclone oil-water separator inlet pipe 315 of the secondary oil-water cyclone separator 320 through a pipeline, and the outlet end of the cyclone oil-water separator underflow pipe 314 of the secondary oil-water cyclone separator 320 is connected to the fine filter A 371 and the water collecting bucket A 361 in sequence through a pipeline.

[0088] More preferably, the pipelines, valves and meters supporting the secondary oil-water cyclone separator 320 specifically include: a pressure gauge F 341 and a valve K 331 are provided on the outlet pipeline of the cyclone oil-water separator underflow pipeline 314, a valve M 333, a pressure gauge H 343 and a flow meter F 352 are provided on the connecting pipeline between the primary oil-water cyclone separator 310 and the secondary oil-water cyclone separator 320, and a pressure gauge J 345, a valve N 334 and a flow meter G 353 are provided on the outlet pipeline of the cyclone oil-water separator external overflow pipeline 316 of the secondary oil-water cyclone separator 320.

[0089] The diameter D of the cylindrical section of the oil-water cyclone separator is calculated by the following formula:

[0090]

[0091] Among them, q m is the processing volume, m 3 / h; Δp m is the maximum actual pressure drop, MPa; ρ l is the liquid density, t / m 3 ; C w is the mass concentration of oil phase, %.

[0092] Nominal diameter of oil-water cyclone separator D c =D / 2.

[0093] The differences between primary and secondary structure design are as follows:

[0094] The first-stage oil-water cyclone separator 310 is a double-cone cyclone, and the flow split ratio is determined according to the oil concentration of the liquid coming from the overflow pipe 223 of the solid-liquid cyclone separator. The short cone section 312 of the cyclone oil-water separator provides sufficient rotational power for the oil-water emulsion, and the oil-water emulsion stays in the slender long cone section 313 of the cyclone oil-water separator for a long time to achieve oil-water separation. c and the diameter D of the cylindrical segment, and then select the length L of the cylindrical segment y1 =D1, length of the great vertebra segment Underflow pipe inner diameter D u1 =0.33D C , length of small cone section Underflow pipe length L u1 =50×D u1 .

[0095] The secondary oil-water cyclone separator 320 is a single cone cyclone, and the inlet oil concentration is lower than the inlet oil concentration of the primary oil-water cyclone separator. In order to achieve the purpose of oil removal, the split ratio should be less than 15%. Based on the nominal diameter D of the oil-water cyclone separator cAnd the diameter of the cylindrical segment D, and then select the length of the cylindrical segment: L y2 =D2, inner diameter of underflow pipe D u2 =0.25D2, cone length Underflow pipe length L u2 =50D2.

[0096] More preferably, in each stage of the oil-water cyclone separator, a single one or multiple ones connected in parallel are used to cope with different processing flow rates.

[0097] The oil-water deep separation unit includes a gravity separator / electric dehydrator 410, and supporting pipes, valves, pressure gauges, and flow meters. The gravity separator / electric dehydrator 410 is a horizontal structure, and its specific structure is as follows: Figure 13-15 As shown, a gravity separator / electric dehydrator inlet pipe A411 and a gravity separator / electric dehydrator inlet pipe B 412 are provided at one end of the gravity separator / electric dehydrator 410, wherein the gravity separator / electric dehydrator inlet pipe A411 is connected to the outlet pipe of the cyclone oil-water separator outer overflow pipe 316 of the secondary oil-water cyclone separator 320, and the gravity separator / electric dehydrator inlet pipe B 412 is connected to the outlet pipe of the cyclone oil-water separator outer overflow pipe 316 of the primary oil-water cyclone separator 310, to receive the waste oil separated by the primary and / or secondary oil-water cyclone separators.

[0098] A gravity separator / electric dehydrator baffle 415 is arranged at the upper part of the cavity near the gravity separator / electric dehydrator inlet pipe A411 and the gravity separator / electric dehydrator inlet pipe B412. The gravity separator / electric dehydrator baffle 415 separates the inlet pipe connection and the gravity separator / electric dehydrator baffle 415 into a gravity separator / electric dehydrator buffer chamber 417, which is used to reduce the flow velocity of the incoming flow, maintain the stability of the liquid in the gravity separator / electric dehydrator oil-water separation chamber, and ensure the separation efficiency.

[0099] A gravity separator / electric dehydrator purified grease discharge pipeline 414 is provided at one end of the gravity separator / electric dehydrator 410, and the gravity separator / electric dehydrator purified grease discharge pipeline 414 is connected to the oil collecting barrel 452 through a pipeline, and a pressure gauge L432, a valve Q 422, and a flow meter I 441 are installed on the pipeline.

[0100] A gravity separator / electric dehydrator oil-water weir 416 is arranged at the bottom of the cavity near the gravity separator / electric dehydrator purified grease discharge pipeline 414. The gravity separator / electric dehydrator oil-water weir 416 separates the connection between the gravity separator / electric dehydrator purified grease discharge pipeline 414 and the gravity separator / electric dehydrator oil-water weir 416 into a gravity separator / electric dehydrator oil storage chamber 419. Since the grease has a low density and is located at the upper part, the separated purified grease will overflow from the upper part of the gravity separator / electric dehydrator oil-water weir 416 and enter the gravity separator / electric dehydrator oil storage chamber 419.

[0101] The communicating area between the gravity separator / electric dehydrator baffle 415 and the gravity separator / electric dehydrator oil-water weir plate 416 is the gravity separator / electric dehydrator oil-water separation chamber 418, in which electrodes are arranged to purify grease by electric field. A gravity separator / electric dehydrator separated wastewater discharge pipe 413 is arranged at the bottom of the gravity separator / electric dehydrator oil-water separation chamber 418; the gravity separator / electric dehydrator separated wastewater discharge pipe 413 is connected to the fine filter B 461 and the water collecting bucket B 451 through a pipe to remove the small-sized solid particles remaining in the separated wastewater and the suspended matter in the water, so that the discharged wastewater meets the discharge standard; and a pressure gauge K 431, a valve P421, and a flow meter J 442 are installed on the connecting pipe.

[0102] More preferably, the electrode structure arranged in the gravity separator / electric dehydrator oil-water separator chamber 418 is a "V"-shaped electrode plate, and multiple "V"-shaped electrode plates are arranged parallel to each other; the open end of the "V"-shaped electrode plate faces the liquid inlet end of the gravity separator / electric dehydrator oil-water separator chamber 418, and the tip of the "V"-shaped electrode plate faces the liquid outlet end of the gravity separator / electric dehydrator oil-water separator chamber 418, and the positive and negative poles of adjacent "V"-shaped electrode plates are arranged alternately, so that the flow direction of the oil-water emulsion can be the same as the direction of the electric field, thereby increasing the electrostatic force between water droplets.

[0103] More specifically, the "V"-shaped electrode plates are all made of conductive materials, and the "V"-shaped electrode plates are exposed in the oil-water emulsion in the gravity separator / electric dehydrator oil-water separator chamber 418, which enhances the charge exchange between the oil-water emulsion and the electrode, enhances the droplet-droplet coalescence process, and improves the oil-water separation efficiency. The upper part of the "V"-shaped electrode is suspended on the inner top of the gravity separator / electric dehydrator oil-water separator chamber 418 through the "V"-shaped electrical suspension column 405, and the "V"-shaped electrical suspension column 405 is made of insulating material to prevent the gravity separator / electric dehydrator 410 shell from being charged.

[0104] More specifically, the “V”-shaped electrode positive electrode 403 and the “V”-shaped electrode negative electrode 404 are arranged with equal spacing, for example, the spacing between adjacent “V”-shaped electrode positive electrodes 403 and “V”-shaped electrode negative electrodes 404 is 100 mm.

[0105] More specifically, the "V"-shaped electrode positive electrode 403 is connected through the "V"-shaped electrode positive electrode connecting column 401, and the "V"-shaped electrode negative electrode 404 is connected through the "V"-shaped electrode negative electrode connecting column 402. The "V"-shaped electrode positive / negative electrode connecting columns are made of conductive materials, and an external power supply applies voltage to the "V"-shaped electrode positive / negative electrodes through the "V"-shaped electrode positive / negative electrode connecting columns, and the "V"-shaped electrode positive / negative electrode connecting columns have a certain supporting effect on the electrodes, thereby avoiding the electrode deviation from the designed position due to the offset of the electrode center of gravity caused by the "V"-shaped electrode shape.

[0106] More specifically, the "V"-shaped electrode plate consists of two inclined electrode plates, the upper and lower ones, with an angle of 80° between the two electrode plates, which promotes the migration of droplets from the open end to the tip of the electrode plate, thereby improving the oil-water separation efficiency.

[0107] More specifically, there is a 0.15D gap between the top of the "V"-shaped electrode plate and the top of the gravity separator / electric dehydrator oil-water separator chamber 418. e (D e The distance between the bottom of the "V"-shaped electrode plate and the bottom of the gravity separator / electric dehydrator oil-water separator chamber 418 is 0.3D. e This installation allows the "V"-shaped electrode plate to be located above the water layer, avoiding short circuits caused by the electrodes contacting the water layer. Fig.15 As shown, the radial distance between the "V"-shaped electrode plate and the side wall of the gravity separator / electric dehydrator oil-water separator chamber 418 is 0.05D e .

[0108] More specifically, rectangular holes distributed in an array are arranged on the "V"-shaped electrode, and the size of the rectangular holes gradually becomes smaller and denser from bottom to top, that is, a larger rectangular hole width is arranged on the side close to the bottom water layer because the diameter of the water droplets in the oil-water emulsion is larger, and a smaller rectangular hole width is arranged on the side close to the upper oil layer because the diameter of the water droplets in the oil-water emulsion is smaller. In this embodiment, the horizontal length of all rectangular holes is 10 mm, and the heights of the rectangular holes located in the upper, middle, and lower regions are 3 mm (25 rows), 4 mm (20 rows), and 5 mm (12 rows), respectively; and the left-right spacing between adjacent rectangular holes is 2 mm, and the vertical spacing between adjacent rectangular holes is 1 mm.

[0109] In addition to the above-mentioned equal spacing and equal length design, the rectangular holes can also be designed with variable spacing and different lengths in different areas. It is only necessary to ensure that the size of the rectangular holes gradually becomes smaller and denser from bottom to top.

[0110] The above embodiments are only used to illustrate the design ideas and features of the present invention, and their purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly. The protection scope of the present invention is not limited to the above embodiments. Therefore, any equivalent changes or modifications made based on the principles and design ideas disclosed by the present invention are within the protection scope of the present invention.

Claims

1. A rapid high gravity field kitchen oil-water separation system, characterized in that: It includes a pre-coarse residue filtration and separation unit, a solid-liquid depth separation unit, a multi-stage oil-water fine filtration unit, and an oil-water depth separation unit; The pre-coarse residue filtering and separation unit comprises a pre-coarse residue filter (110) and a Y-type filter (171); the pre-coarse residue filter (110) is internally provided with an agitator (120) and a pre-coarse residue filter screen (117); under the action of the agitator (120), a centrifugal action is used to achieve a preliminary separation of solid waste and liquid waste; a pre-coarse residue filter liquid storage chamber (125) is separated between the pre-coarse residue filter screen (117) and the inner wall surface of the pre-coarse residue filter cylinder; the pre-coarse residue filter liquid storage chamber (125) inputs the pre-filtered liquid waste into the Y-type filter (171) through the pre-coarse residue filter discharge pipe (112); The solid-liquid deep separation unit comprises a solid-liquid cyclone separator (220) and a booster pump (210). The booster pump (210) is arranged on a connecting pipeline between the Y-type filter (171) and the solid-liquid cyclone separator (220), and pumps the liquid waste filtered by the Y-type filter (171) into the solid-liquid cyclone separator (220). The solid-liquid cyclone separator (220) performs solid-liquid cyclone separation on the liquid waste again. The multi-stage oil-water fine filtration unit comprises a primary oil-water cyclone separator (310) and a secondary oil-water cyclone separator (320), wherein the primary oil-water cyclone separator (310) adopts a double-cone cyclone, and the secondary oil-water cyclone separator (320) adopts a single-cone cyclone; the inlet end of the primary oil-water cyclone separator (310) is connected to the liquid phase outlet of the solid-liquid cyclone separator (220); the oil phase outlet of the primary oil-water cyclone separator (310) is connected to the oil-water depth separation unit, and the water phase outlet of the primary oil-water cyclone separator (310) is connected to the inlet end or the water collecting bucket of the secondary oil-water cyclone separator (320); the oil phase outlet of the secondary oil-water cyclone separator (320) is connected to the oil-water depth separation unit, and the water phase outlet of the secondary oil-water cyclone separator (320) is connected to the water collecting bucket; The oil-water deep separation unit comprises a gravity separator / electric dehydrator (410). The gravity separator / electric dehydrator (410) has built-in electrodes and uses an electric field to purify oil.

2. A rapid high gravity field kitchen oil-water separation system according to claim 1, characterized in that: The solid-liquid cyclone separator (220) comprises a solid-liquid cyclone separator cylindrical section (221), a solid-liquid cyclone separator conical section (225), and a solid-liquid cyclone separator underflow pipe (224) which are connected in sequence, and the three are arranged along the same center line; the side wall of the solid-liquid cyclone separator cylindrical section (221) is connected to the solid-liquid cyclone separator inlet pipe (222), and one end of the solid-liquid cyclone separator inlet pipe (222) is connected along the solid-liquid cyclone separator. The separator cylindrical section (221) is arranged tangentially, and the other end is connected to the outlet pipeline of the booster pump (210); a solid-liquid cyclone separator overflow pipe (223) is arranged at the end of the solid-liquid cyclone separator cylindrical section (221), one end of the solid-liquid cyclone separator overflow pipe (223) extends to the inside of the solid-liquid cyclone separator cylindrical section (221) and is arranged along the same center line, and the other end is located outside the solid-liquid cyclone separator cylindrical section (221).

3. The rapid high gravity field kitchen oil-water separation system according to claim 2 is characterized in that: The primary oil-water cyclone separator (310) comprises a cyclone oil-water separator cylindrical section (311), a cyclone oil-water separator short cone tube (312), a cyclone oil-water separator long cone tube (313), and a cyclone oil-water separator underflow pipe (314) which are connected in sequence, and the four are arranged along the same center line; a cyclone oil-water separator inlet pipe (315) is connected to the side wall of the cyclone oil-water separator cylindrical section (311), and the cyclone oil-water separator inlet pipe (315) is connected to the side wall of the cyclone oil-water separator cylindrical section (311). 5) is arranged along the tangent direction of the cyclone oil-water separator cylindrical section (311), and the other end is connected to the solid-liquid cyclone separator overflow pipe (223); a cyclone conductor is arranged axially in the cyclone oil-water separator cylindrical section (311), and a cyclone oil-water separator rotating guide vane (317) is arranged on the outer wall of the cyclone conductor, and the cyclone oil-water separator rotating guide vane (317) divides the flow channel between the cyclone conductor and the inner wall of the cyclone oil-water separator cylindrical section (311) into a spiral flow channel.

4. The rapid high gravity field kitchen oil-water separation system according to claim 1, characterized in that: A gravity separator / electric dehydrator baffle (415) is arranged at the upper part of the cavity near the gravity separator / electric dehydrator inlet pipeline side, and the gravity separator / electric dehydrator baffle (415) separates the gravity separator / electric dehydrator buffer chamber (417) between the inlet pipeline connection and the gravity separator / electric dehydrator baffle (415); a gravity separator / electric dehydrator purified grease discharge pipeline (414) is arranged at one end of the gravity separator / electric dehydrator (410); a gravity separator is arranged at the bottom of the cavity near the gravity separator / electric dehydrator purified grease discharge pipeline (414) side. The gravity separator / electric dehydrator oil-water weir plate (416) is a device for discharging purified grease from the gravity separator / electric dehydrator. The gravity separator / electric dehydrator oil-water weir plate (416) separates the connection between the gravity separator / electric dehydrator purified grease discharge pipeline (414) and the gravity separator / electric dehydrator oil-water weir plate (416) into a gravity separator / electric dehydrator oil storage chamber (419); the communication area between the gravity separator / electric dehydrator baffle plate (415) and the gravity separator / electric dehydrator oil-water weir plate (416) is a gravity separator / electric dehydrator oil-water separation chamber (418), and the electrode is arranged in the gravity separator / electric dehydrator oil-water separation chamber (418).

5. The rapid high gravity field kitchen oil-water separation system according to claim 4 is characterized in that: The electrode is composed of a plurality of "V"-shaped electrode plates, and the positive and negative poles of adjacent "V"-shaped electrode plates are arranged alternately; the opening side of the "V"-shaped electrode plate faces the liquid inlet end, and the tip of the "V"-shaped electrode plate faces the liquid outlet end.

6. The rapid high gravity field kitchen oil-water separation system according to claim 5, characterized in that: The "V"-shaped electrode plate is provided with rectangular holes arranged in an array, and the size of the rectangular holes gradually decreases from bottom to top.

7. A rapid high gravity field kitchen oil-water separation system according to claim 1, 2 or 3, characterized in that: The solid-liquid cyclone separator (220), the first-stage oil-water cyclone separator (310), and the second-stage oil-water cyclone separator (320) are in the form of a single or multiple parallel connections to meet the requirements of different processing speeds.

8. The rapid high gravity field kitchen oil-water separation system according to claim 1, characterized in that: The pre-coarse residue filtering and separation unit, the solid-liquid depth separation unit, the multi-stage oil-water fine filtering unit, and the oil-water depth separation unit are equipped with heaters to prevent the kitchen oil and water from solidifying at low temperatures.

9. The rapid high gravity field kitchen oil-water separation system according to claim 1, characterized in that: The pre-coarse residue filter screen (117) is equipped with a pre-coarse residue filter backwashing pipeline (113), and high-pressure water is pumped into the pre-coarse residue filter backwashing pipeline (113) to wash the pre-coarse residue filter screen (117).

10. The rapid high gravity field kitchen oil-water separation system according to claim 1, characterized in that: The stirrer (120) comprises three or more secondary stirring shafts, and each secondary stirring shaft is provided with four blades along the axial direction.

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