A continuous solid-liquid separation device and a solid-liquid separation method

Abstract

The present invention discloses a continuous solid-liquid separation device and a solid-liquid separation method. The device includes a first synchronous oil cylinder, a second synchronous oil cylinder, a suction filtration cylinder, a rotary discharging assembly, a filter cake lifting assembly, and a vacuum suction filtration assembly; a feed valve is installed at the feed inlet of the suction filtration cylinder, a first valve port of the feed valve is connected to an inert gas pipeline, and a second valve port is connected to a material tank; the filtrate discharge port of the suction filtration cylinder is connected to the vacuum suction filtration assembly; the first synchronous oil cylinder is installed at the cylinder port of the suction filtration cylinder and is connected to the rotary discharging assembly; one end of the filter cake lifting assembly is built into the suction filtration cylinder, and the other end penetrates through the rotary discharging assembly, and the second synchronous oil cylinder is connected to the filter cake lifting assembly. The present invention can effectively discharge the air in the suction filtration cylinder before the solid-liquid separation operation, ensuring the safe progress of the solid-liquid separation operation; multiple processes such as feeding and filtering, squeezing and filtering, and discharging can be performed in the same suction filtration cylinder, realizing continuous separation, with good separation effect, high efficiency, and safety and reliability.

Description

Technical Field

[0001] The present invention relates to the technical field of solid-liquid separation, and particularly to a continuous solid-liquid separation system and a solid-liquid separation method, which are applicable to the separation of sludge and wastewater in the environmental protection industry, the separation of compounds and mother liquor in the chemical industry, and the solid-liquid separation of complex mixtures in the new material industry. Background Art

[0002] Solid-liquid separation operations are required in industries such as chemical engineering, medicine, and new materials.

[0003] The existing solid-liquid separators in the market mainly include plate and frame filter presses, centrifuges, presses, suction filters, multi-functional integrated machines, and sedimentators. Most of these devices have a single function and cannot operate continuously. To achieve continuous operation, a combination of multiple single-function devices is required, which has the disadvantages of high equipment investment cost and large floor area.

[0004] In addition, there are safety hazards when the above-mentioned solid-liquid separators separate toxic, harmful, flammable, and explosive mixtures. Summary of the Invention

[0005] The present invention provides a continuous solid-liquid separation device and a solid-liquid separation method to solve the problem of safety hazards existing in the prior art when separating toxic, harmful, flammable, and explosive compounds.

[0006] To solve the above technical problems, the present invention provides a continuous solid-liquid separation device, comprising: an oil pressure station, a first synchronous oil cylinder, a second synchronous oil cylinder, a suction filtration cylinder, a rotary discharging assembly, a filter cake lifting assembly, and a vacuum suction filtration assembly;

[0007] The suction filtration cylinder is arranged vertically, with a feed inlet and a discharge outlet opened at its upper part, and a filtrate chamber and a filtrate discharge outlet at its bottom; a feed valve and a discharge valve are respectively installed on the feed inlet and the discharge outlet; the first valve port of the feed valve is connected to an inert gas pipeline, and its second valve port is connected to a material tank and a rinsing tank; the filtrate discharge outlet is connected to the vacuum suction filtration assembly;

[0008] The first synchronous oil cylinder is symmetrically installed on the cylinder mouth of the suction filtration cylinder, the rotary discharging assembly is movably arranged on the cylinder mouth of the suction filtration cylinder and is located inside the first synchronous oil cylinder, and the power output end of the first synchronous oil cylinder is connected to the rotary discharging assembly to control the lifting of the rotary discharging assembly;

[0009] One end of the filter cake lifting assembly is built inside the suction filtration cylinder, and the other end penetrates through the rotary discharging assembly. The second synchronous oil cylinders are symmetrically arranged, and their power output ends are connected to the filter cake lifting assembly to control the lifting of the filter cake lifting assembly;

[0010] The first synchronous oil cylinder and the second synchronous oil cylinder are respectively connected to the oil supply pipeline and the oil return pipeline of the oil pressure station.

[0011] In a preferred embodiment of the present invention, the filter cake lifting assembly includes a filter cake lifting frame, a filter cake lifting shaft, and a filter cake lifting disc;

[0012] Wherein, the filter cake lifting frame is located above the suction filtration cylinder, the filter cake lifting disc is located inside the suction filtration cylinder and above the filtrate bin, and both ends of the filter cake lifting shaft are respectively connected to the filter cake lifting frame and the filter cake lifting disc;

[0013] The top end of the power output shaft of the second synchronous oil cylinder is flange-connected to the filter cake lifting frame.

[0014] In a preferred embodiment of the present invention, the rotary discharging assembly includes a rotary discharging disc, a rotary shaft, a gearbox, a rotary motor, and a balance support assembly;

[0015] The rotary shaft is of a hollow structure and is sleeved on the filter cake lifting shaft;

[0016] The balance support assembly is connected to the rotary shaft;

[0017] The power output end of the first synchronous oil cylinder is connected to the balance support assembly, and the lifting of the rotary discharging assembly is controlled through the balance support assembly;

[0018] The rotary discharging disc is connected to the bottom of the rotary shaft and is suspended at the opening of the suction filtration cylinder;

[0019] The gearbox is sleeved on the rotary shaft and is installed on the upper surface of the balance support assembly;

[0020] The rotary motor is sleeved on the rotary shaft and is located on the upper surface of the gearbox.

[0021] In a preferred embodiment of the present invention, the balance support assembly includes a balance frame, an annular support plate, and a concentric bearing;

[0022] The balance frame is of a hollow cylindrical structure, and annular holes are provided at the centers of its top surface and bottom surface; the rotary shaft passes through the annular hole of the balance frame;

[0023] The concentric bearing is sleeved and fixed on the rotary shaft and is connected to the annular hole at the bottom surface of the balance frame;

[0024] The annular support plate is concentrically arranged with the balance frame and is installed on the upper surface of the balance frame;

[0025] The power output end of the first synchronous oil cylinder is connected to the annular support plate;

[0026] The transmission is installed on the upper surface of the annular support plate.

[0027] In a preferred embodiment of the present invention, an O-ring seal is filled in the gap between the rotating shaft and the filter cake lifting shaft.

[0028] In a preferred embodiment of the present invention, multiple scraping blades are evenly installed on the lower surface of the rotary discharge tray.

[0029] In a preferred embodiment of the present invention, a support seal ring plate and an air bag are further installed at the mouth of the suction filter cylinder;

[0030] Wherein, the support seal ring plate is flange-connected to the mouth flange of the suction filter cylinder and is located above the rotary discharge tray;

[0031] The first synchronous oil cylinder is installed on the upper surface of the support seal ring plate;

[0032] The air bag is installed under the support seal ring plate and is located inside the mouth of the suction filter cylinder.

[0033] In a preferred embodiment of the present invention, the vacuum suction filtration assembly includes a buffer tank, a filtrate diaphragm pump, and a vacuum pump;

[0034] Wherein, the buffer tank is connected to the filtrate discharge port of the suction filter cylinder through a pipeline, the bottom port of the buffer tank is connected to the filtrate diaphragm pump, and its top port is connected to the vacuum pump.

[0035] To solve the above technical problems, the present invention provides a continuous solid-liquid separation method, which uses the above solid-liquid separation device and includes the following steps:

[0036] (1) Feed filtration: The power output shaft of the first synchronous oil cylinder rises, and the mixed material to be separated in the material tank is conveyed into the suction filter cylinder through the second valve port of the feed valve. After being filtered by the filter cake lifting plate, the filtrate enters the filtrate bin and is discharged through the vacuum suction filtration assembly;

[0037] (2) Press filtration: The power output shaft of the first synchronous oil cylinder retracts, driving the rotary discharge tray to move downward, so that the liquid in the material in the suction filter cylinder is further filtered by the filter cake lifting plate to achieve press filtration. The filtrate enters the filtrate bin and is discharged through the vacuum suction filtration assembly;

[0038] (3) Lift the filter cake and rotate for discharging: Start the second synchronous oil cylinder, make its power output end rise, and lift the filter cake lifting plate upward at a speed of 60 r / min to 80 r / min;

[0039] Start the rotary motor, control the rotary discharge tray to rotate clockwise at a rate of 42 r / min, so that the filter cake on the filter cake lifting tray is scattered and discharged from the discharge valve on the discharge port, and the solid-liquid separated material is obtained.

[0040] In a preferred embodiment of the present invention, in step (1), before introducing the mixed material into the suction filtration cylinder, an inert gas is first introduced into the suction filtration cylinder through the first valve port of the feed valve to discharge the air in the suction filtration cylinder.

[0041] The beneficial effects of the present invention are as follows: A continuous solid-liquid separation system and a solid-liquid separation method of the present invention, through the design and combined application of an oil pressure station, a first synchronous oil cylinder, a second synchronous oil cylinder, a suction filtration cylinder, a rotary discharge assembly, a filter cake lifting assembly and a vacuum suction filtration assembly, on the one hand, can effectively discharge the air in the suction filtration cylinder before the solid-liquid separation operation, ensuring the safe progress of the separation operation of toxic, harmful and flammable and explosive mixtures; on the other hand, multiple processes such as feeding and filtering, squeezing and filtering, and discharging can be performed in the same suction filtration cylinder, realizing continuous separation, with good solid-liquid separation effect, high efficiency, less equipment investment, small floor area, and being safe and reliable. Description of the Drawings

[0042] Figure 1 It is a schematic connection structure diagram of a continuous solid-liquid separation device of the present invention;

[0043] Figure 2 It is a schematic structure diagram of the suction filtration cylinder in the state of the feeding and filtering mode;

[0044] Figure 3 It is a schematic structure diagram of the suction filtration cylinder in the state of the squeezing and filtering mode;

[0045] Figure 4 It is a schematic structure diagram of the suction filtration cylinder in the state of the rotary discharge mode;

[0046] The marks of each component in the drawings are as follows:

[0047] 10. Oil pressure station; 20. First synchronous oil cylinder; 30. Second synchronous oil cylinder;

[0048] 40. Suction filtration cylinder, 41. Feed valve, 42. Discharge valve, 43. Filtrate bin, 44. Filtrate discharge port, 411. First valve port, 412. Second valve port, 45. Support sealing ring plate, 46.Airbag;

[0049] 50. Material receiver;

[0050] 60. Rotary discharge assembly, 61. Rotary discharge tray, 62. Rotary shaft, 63. Gearbox, 64. Rotary motor, 65. Balance frame, 66. Annular support plate, 67. Concentric bearing, 68. Scraper;

[0051] 70. Filter cake lifting assembly, 71. Filter cake lifting frame, 72. Filter cake lifting shaft, 73. Filter cake lifting disc;

[0052] 80. Vacuum filtration assembly, 81. Buffer tank, 82. Filtrate diaphragm pump, 83. Vacuum pump;

[0053] 90. Material tank, 91. Mixing and conveying pump, 92. Mixing switch valve; 100. Rinsing tank, 101. Rinsing liquid switch valve; 110. Cleaning tank, 111. Cleaning liquid switch valve; 120. Booster pump. Detailed implementation manners

[0054] The following elaborates on the preferred embodiments of the present invention in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0055] Please refer to Figures 1-4 , the embodiments of the present invention include:

[0056] The present invention discloses a continuous solid-liquid separation device, including: an oil pressure station 10, three first synchronous cylinders 20, three second synchronous cylinders 30, a filtration cylinder 40, a material receiver 50, a rotary discharging assembly 60, a filter cake lifting assembly 70, and a vacuum filtration assembly 80.

[0057] Specifically, the filtration cylinder 40 is a cylindrical barrel, and is vertically arranged in an upward-opening direction under the support of the support legs. A flange is provided at the top opening of the filtration cylinder 40, and a feed inlet and a discharge outlet are respectively opened on both sides of its upper part. A feed valve 41 is installed on the feed inlet, and a discharge valve 42 is installed on the discharge outlet. Its bottom is provided with a conical filtrate bin 43, and a filtrate discharge port 44 is opened at the bottom of the filtrate bin 43.

[0058] The feed valve 41 has an upward first valve port 411 and a downward second valve port 412. Among them, the first valve port 411 is connected to an inert gas (such as nitrogen) pipeline for introducing inert gas into the filtration cylinder 40 before feeding to discharge air and improve safety performance. The second valve port 412 is respectively connected to the material tank 90, the rinsing tank 100, and the cleaning tank 110 through pipelines.

[0059] Among them, the material tank 90 contains the solid-liquid mixture to be separated. A mixing transfer pump 91 and a mixing switch valve 92 are installed on the pipeline between the material tank 90 and the second valve port 412. The rinsing tank 100 contains the filter cake rinsing liquid. A rinsing liquid switch valve 101 is installed on the pipeline between the rinsing tank 100 and the second valve port 412. The cleaning tank 110 contains a chemical solution capable of dissolving solids, which is used to clean the residual solid materials on the scraper and the filter screen. A cleaning liquid switch valve 111 is installed on the pipeline between the cleaning tank 110 and the second valve port 412.

[0060] A booster pump 120 is also installed on the pipelines between the material tank 90, the rinsing tank 100, the cleaning tank 110 and the second valve port 412, which is used to accelerate the speed of the solid-liquid mixture, the rinsing liquid and the cleaning liquid entering the suction filtration cylinder 40.

[0061] The discharge valve 42 has a downward valve port, which is connected to the material receiver 50. The solid materials separated from the solid and liquid in the suction filtration cylinder 40 enter the material receiver 50 through the discharge valve 42 for recovery.

[0062] The vacuum suction filtration assembly 80 includes a buffer tank 81, a filtrate diaphragm pump 82 and a vacuum pump 83. Among them, the filtrate discharge port 44 is connected to the liquid inlet of the buffer tank 81 through a pipeline. The bottom port of the buffer tank 81 is connected to the filtrate diaphragm pump 82, and its top port is connected to the vacuum pump 83. Through the design of the vacuum suction filtration assembly 80, the filtrate in the filtrate chamber 43 can be pumped into the buffer tank 81, so that the solid materials are left in the suction filtration cylinder 40, initially completing the solid-liquid separation and laying a foundation for realizing continuous separation operation.

[0063] Specifically, a support sealing ring plate 45 is also installed at the top port of the suction filtration cylinder 40. The support sealing ring plate 45 is a circular plate with a partially hollowed-out middle, and its outer edge is flush with the outer edge of the flange at the top port of the suction filtration cylinder 40. The support sealing ring plate 45 is connected to the flange at the top port of the suction filtration cylinder 40 by screws.

[0064] Three of the first synchronous oil cylinders 20 are arranged vertically at equal intervals on the support sealing ring plate 45, and their power output ends can rise and retract in the vertical direction.

[0065] Three of the second synchronous oil cylinders 30 are arranged vertically at equal intervals on the support legs around the suction filtration cylinder, and their power output ends can rise and retract in the vertical direction.

[0066] The oil pressure station 10 is provided with a pressure-holding valve oil delivery pipe and a pressure-holding valve oil return pipe. Among them, 3 branch oil delivery pipes are connected in parallel on the pressure-holding valve oil delivery pipe and are respectively connected to the oil inlets of the 3 first synchronous oil cylinders 20; 3 branch oil return pipes are connected in parallel on the pressure-holding valve oil return pipe and are respectively connected to the oil outlets of the 3 second synchronous oil cylinders 30.

[0067] The power output end of the first synchronous oil cylinder 20 is connected to the rotary discharging assembly 60 to control the lifting of the rotary discharging assembly 60.

[0068] The power output end of the second synchronous oil cylinder 30 is connected to the filter cake lifting assembly 70 to control the lifting of the filter cake lifting assembly 70.

[0069] Specifically, the filter cake lifting assembly 70 includes a filter cake lifting frame 71, a filter cake lifting shaft 72 and a filter cake lifting disk 73.

[0070] Among them, the filter cake lifting frame 71 is a circular ring plate and is located above the suction filtration cylinder 40. The filter cake lifting disk 73 is a porous circular plate with a diameter slightly smaller than the inner diameter of the suction filtration cylinder 40 and is located in the suction filtration cylinder 40 and above the filtrate bin 43. A filter screen is installed on the filter cake lifting disk 73 for filtering the filtrate and intercepting the solid phase components. The filter cake lifting shaft 72 is arranged vertically, and its two ends are respectively connected to the center of the filter cake lifting frame 71 and the filter cake lifting disk 73.

[0071] The power output ends of the 3 second synchronous oil cylinders 30 are respectively flange-connected to the trisection points of the filter cake lifting frame 71, and the lifting of the filter cake lifting assembly 70 is driven by the rising and retracting of the power output shafts of the second synchronous oil cylinders 30.

[0072] The rotary discharging assembly 60 includes a rotary discharging disk 61, a rotary shaft 62, a gearbox 63, a rotary motor 64, a balance frame 65, an annular support plate 66 and a concentric bearing 67.

[0073] Among them, the rotary shaft 62 is of a hollow structure and is sleeved on the part of the filter cake lifting shaft 72 above the cylinder opening of the suction filtration cylinder 40. Its bottom end is connected to the rotary discharging disk 61, and its top end is connected to the filter cake lifting frame 71. An O-ring seal is filled in the gap between the rotary shaft 62 and the filter cake lifting shaft 72. O-ring seal baffles are also provided at the upper and lower ends of the rotary shaft 62. Through the design of filling the O-ring seal, it can not only lubricate the filter cake lifting shaft 72, but also play a role in sealing and fixing the concentricity between the filter cake lifting shaft 72 and the rotary shaft 62.

[0074] The balance frame 65 is a hollow cylindrical structure with an annular hole at the center of its top and bottom surfaces. The rotating shaft 62 passes through the annular hole of the balance frame 65. The concentric bearing 67 is fixedly mounted on the rotating shaft 62 and connected to the annular hole on the bottom surface of the balance frame 65.

[0075] The annular support plate 66 is arranged concentrically with the gimbal 65 and is mounted on the upper surface of the gimbal 65. The gearbox 63 is sleeved on the rotating shaft 62 and mounted on the upper surface of the annular support plate 66. The rotary motor 64 is sleeved on the rotating shaft 62 and located on the upper surface of the gearbox 63.

[0076] The power output ends of the three first synchronous cylinders 20 are connected to the annular support plate 66 , and the lifting and lowering of the rotary unloading assembly 60 is controlled by the annular support plate 66 .

[0077] The rotary discharge tray 61 is suspended at the mouth of the suction cylinder 40 and located below the support sealing ring plate 45. An airbag 46 is mounted on the lower surface of the support sealing ring plate 45, located inside the mouth of the suction cylinder 40. When the rotary discharge tray 61 rises, it presses against the airbag 46, and the airbag 46, under the conditions of inflating or compressing air, seals the mouth of the suction cylinder 40, preventing material from leaking out of the mouth of the suction cylinder 40.

[0078] A plurality of scrapers 68 are evenly mounted on the lower surface of the rotary discharge plate 61 for scraping off solid materials on the filter cake lifting plate 73 .

[0079] The method for solid-liquid separation using the above-mentioned continuous solid-liquid separation device specifically comprises the following steps:

[0080] (1) Feed filtration: Open the first synchronous oil cylinder 20 to raise its power output shaft, driving the rotating discharge plate 61 to rise and squeeze the airbag 46, thereby sealing the cylinder mouth of the suction cylinder 40;

[0081] Open the first valve port 411 of the feed valve 41, and introduce an inert gas, such as nitrogen, into the suction cylinder 40 to expel the air in the suction cylinder. Then close the first valve port 411, open the mixing delivery pump 91, the mixing switch valve 92, the booster pump 120, and the second valve port 412, and deliver the mixed material in the material tank 90 to the suction cylinder 40 through the second valve port 412. The liquid in the mixed material passes through the filter cake lifting plate 73 and enters the filtrate bin 43, and is discharged through the vacuum filtration assembly 80.

[0082] (2) Squeezing and filtration: The power output shaft of the first synchronous oil cylinder 20 retracts, driving the rotating discharge plate 61 downward, thereby squeezing the material in the suction cylinder 40, so that the liquid therein is further filtered through the filter cake lifting plate 73, achieving squeezing and filtration, and the filtrate enters the filtrate bin 43 and is discharged through the vacuum filtration assembly 80;

[0083] (3) Lifting the filter cake for rotary unloading: Start the second synchronous oil cylinder 30 to raise its power output end and lift the filter cake lifting plate 73 upward at a speed of 60 r / min to 80 r / min;

[0084] Start the rotating motor 64 and control the rotating discharge plate 61 to rotate clockwise at a rate of 42 r / min, so that the filter cake on the filter cake lifting plate 73 is scattered and discharged from the discharge valve 42 on the discharge port and enters the material receiver 50 to obtain the material after solid-liquid separation.

[0085] The process of solid-liquid separation by the continuous solid-liquid separation device of the present invention is described in detail below:

[0086] 1) Prepare a certain amount of material in the material tank 90 and the rinse tank 100 respectively;

[0087] 2) Starting the oil pressure station 10, which can automatically start and stop under the action of the oil pressure station pressure transmitter;

[0088] 3) The three first synchronous oil cylinders 20 are turned on to raise their power output shafts, which move the annular support plate 66 to drive the rotating discharge tray 61 upward, press against the airbag 46, and seal the upper opening of the filtration cylinder 40;

[0089] 4) Nitrogen is introduced into the suction cylinder 40 through the first valve port 411 of the feed valve 41, so that the air in the suction cylinder 40 is exhausted from the filtrate outlet 44 through the buffer tank 81 and the nozzle of the vacuum pump 83. The nitrogen introduction is then stopped to ensure the safety of the filtration process.

[0090] 5) First, simultaneously open the feed valve 41 and the mixing switch valve 92, and then simultaneously start the mixing delivery pump 91 and the booster pump 120. Under the action of the mixing delivery pump 91 and the booster pump 120, the mixed material in the material tank 90 is delivered into the filtration cylinder 40 through the pipeline and the second valve port 412 on the feed valve 41. Part of the liquid in the mixed material enters the filtrate bin 43 through the holes on the filter cake lifting plate 73 and the filter screen;

[0091] 6) Simultaneously start the filtrate diaphragm pump 82 and the vacuum pump 83. The liquid accumulated in the filtrate bin 43 enters the buffer tank 81 through the pipeline and is discharged by the filtrate diaphragm pump 82 for collection.

[0092] 7) When the material in the suction filtration cylinder 40 is full, first simultaneously shut down the mixing and conveying pump 91 and the booster pump 120, and then close the feed valve 41;

[0093] 8) Start the 3 first synchronous cylinders 20, retract their power output shafts downward, that is, contract, drive the rotary discharge tray 61 to move downward, squeeze the mixed material in the suction filtration cylinder 40, and extrude the liquid in the mixed material. When the contraction stroke of the 3 first synchronous cylinders 20 reaches the position, the 3 first synchronous cylinders 20 automatically rise and return to the state of sealing the upper opening of the suction filtration cylinder;

[0094] 9) First simultaneously open the rinse liquid switch valve 101 and the feed valve 41, and then start the booster pump 120. Under the action of the booster pump 120, the prepared rinse liquid in the rinse tank 100 is sent through the pipeline and the second valve port 412 of the feed valve 41 into the space formed by squeezing in the suction filtration cylinder 40. Under the action of the vacuum pump 83 and the filtrate diaphragm pump 82, the rinse liquid first penetrates the filter cake in the suction filtration cylinder 40 for rinsing, then passes through the filter cake lifting plate 73, and finally passes through the filtrate chamber 43 and the filtrate discharge port 44, and is discharged under the action of the filtrate diaphragm pump 82 for separate collection;

[0095] 10) When all the prepared rinse materials are sent into the suction filtration cylinder 40, first shut down the booster pump 120, and then close the feed valve 41 and the rinse liquid switch valve 101;

[0096] 11) When the rinse liquid in the suction filtration cylinder 40 is basically drained, simultaneously shut down the vacuum pump 83 and the filtrate diaphragm pump 82;

[0097] 12) Open the discharge valve 42, first simultaneously start the 3 first synchronous cylinders 20 and the rotary motor 64. The power output shaft of the first synchronous cylinder 20 retracts, driving the rotary discharge tray 61 to rotate at a speed of 42 revolutions per minute;

[0098] Then start the 3 second synchronous cylinders 30. The power output shafts of the second synchronous cylinders 30 rise, driving the filter cake lifting plate 73 to lift the filter cake at a speed of 80 mm / minute;

[0099] The scraper 68 at the bottom of the rotary discharge tray 61 scrapes the filter cake on the filter cake lifting plate 73. The scraped filter cake is scattered from the suction filtration cylinder 40 to the discharge valve 42 and discharged through the discharge port on the valve housing of the discharge valve 42 into the material receiver 50;

[0100] 13) When the rising stroke of the 3 second synchronous cylinders 30 reaches the position, that is, the material has been unloaded, shut down the rotary motor 64 and close the discharge valve 42;

[0101] 14) When there is residual material on the filter cake lifting plate 73, the scraper 68 and the filter mesh holes in the suction filtration cylinder 40, open the booster pump 120, the feed valve 41 and the cleaning liquid switch valve 111 to allow the cleaning liquid in the cleaning tank 110 to enter the suction filtration cylinder 40. When the cleaning liquid enters, stop the rotary discharging plate 61 above the feed port of the suction filtration cylinder 40 and stop the filter cake lifting plate 73 below the discharging port of the suction filtration cylinder 40 to achieve the purpose of cleaning the scraper 68, the filter cake lifting plate 73 and the filter mesh thereon.

[0102] 15) After the input cleaning liquid cleans each component in the suction filtration cylinder 40, start the filtrate diaphragm pump 82 to pump out the cleaning liquid for separate collection.

[0103] The present invention can perform multiple separation processes such as feeding filtration, squeezing filtration, and rotary discharging in the same suction filtration cylinder, realizing the continuous separation of solid-liquid mixed materials, with high separation efficiency, good separation effect, safety and reliability; and with less equipment investment and small floor area, it can meet the usage requirements for the separation of solid-liquid mixtures in different fields and has strong practicability.

[0104] The above are only the embodiments of the present invention and do not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the description and drawings of the present invention, or directly or indirectly applied in other related technical fields, shall be equally included in the patent protection scope of the present invention.

Claims

1. A continuous solid-liquid separation device, characterized in that, Comprising: An oil pressure station, a first synchronous oil cylinder, a second synchronous oil cylinder, a suction filtration cylinder, a rotary discharging assembly, a filter cake lifting assembly and a vacuum suction filtration assembly; The suction filtration cylinder is arranged vertically, with a feed inlet and a discharge outlet provided at its upper part, and a filtrate bin and a filtrate discharge outlet at its bottom; a feed valve and a discharge valve are respectively installed on the feed inlet and the discharge outlet; a first valve port of the feed valve is connected to an inert gas pipeline, and its second valve port is connected to a material tank and a rinsing tank; the filtrate discharge outlet is connected to the vacuum suction filtration assembly; The first synchronous oil cylinder is symmetrically installed on the cylinder opening of the suction filtration cylinder. The rotary discharging assembly is movably arranged on the cylinder opening of the suction filtration cylinder and is located inside the first synchronous oil cylinder. The power output end of the first synchronous oil cylinder is connected to the rotary discharging assembly to control the lifting of the rotary discharging assembly; One end of the filter cake lifting assembly is built inside the suction filtration cylinder, and the other end penetrates through the rotary discharging assembly. The second synchronous oil cylinders are symmetrically arranged, and their power output ends are connected to the filter cake lifting assembly to control the lifting of the filter cake lifting assembly; The first synchronous oil cylinder and the second synchronous oil cylinder are respectively connected to the oil delivery pipeline and the oil return pipeline of the oil pressure station; The filter cake lifting assembly includes a filter cake lifting frame, a filter cake lifting shaft and a filter cake lifting disc; Wherein, the filter cake lifting frame is located above the suction filtration cylinder, the filter cake lifting disc is located inside the suction filtration cylinder and above the filtrate bin, and both ends of the filter cake lifting shaft are respectively connected to the filter cake lifting frame and the filter cake lifting disc; The top end of the power output shaft of the second synchronous oil cylinder is flange-connected to the filter cake lifting frame; The rotary discharging assembly includes a rotary discharging disc, a rotary shaft, a gearbox, a rotary motor and a balance support assembly; The rotary shaft is of a hollow structure and is sleeved on the filter cake lifting shaft; The balance support assembly is connected to the rotary shaft; The power output end of the first synchronous oil cylinder is connected to the balance support assembly to control the lifting of the rotary discharging assembly through the balance support assembly; The rotary discharging disc is connected to the bottom of the rotary shaft and is suspended at the cylinder opening of the suction filtration cylinder; The gearbox is sleeved on the rotary shaft and is installed on the upper surface of the balance support assembly; The rotary motor is sleeved on the rotary shaft and is located on the upper surface of the gearbox; The balance support assembly includes a balance frame, an annular support plate and a concentric bearing; The balance frame is of a hollow cylindrical structure, with annular holes at the centers of its top surface and bottom surface; the rotary shaft penetrates through the annular hole of the balance frame; The concentric bearing is sleeved and fixed on the rotary shaft and is connected to the annular hole at the bottom surface of the balance frame; [[ID= ​ ​ ​ The filter cake lifting plate is lifted upward at a speed of 60 r / min to 80 r / min, and the rotary discharge plate rotates clockwise at a rate of 42 r / min; the scraper at the bottom of the rotary discharge plate scatters the filter cake on the filter cake lifting plate.

2. The continuous solid-liquid separation device according to claim 1, wherein An O-ring seal is filled in the gap between the rotating shaft and the filter cake lifting shaft.

3. A continuous solid-liquid separation device according to claim 1, characterized in that, A support sealing ring plate and an airbag are also installed at the mouth of the suction filtration cylinder; Among them, the support sealing ring plate is flange-connected to the mouth flange of the suction filtration cylinder and is located above the rotary discharge plate; The first synchronous oil cylinder is installed on the upper surface of the support sealing ring plate; The airbag is installed under the support sealing ring plate and is located inside the mouth of the suction filtration cylinder.

4. A continuous solid-liquid separation device according to claim 1, characterized in that, The vacuum suction filtration assembly includes a buffer tank, a filtrate diaphragm pump and a vacuum pump; Among them, the buffer tank is connected to the filtrate discharge port of the suction filtration cylinder through a pipeline, the bottom port of the buffer tank is connected to the filtrate diaphragm pump, and its top port is connected to the vacuum pump.

5. A continuous solid-liquid separation method, characterized in that, Using the solid-liquid separation device according to any one of claims 1-4, the following steps are included: (1) Feed filtration: The power output shaft of the first synchronous oil cylinder rises, and the mixed material to be separated in the material tank is conveyed into the suction filtration cylinder through the second valve port of the feed valve. After being filtered by the filter cake lifting plate, the filtrate enters the filtrate bin and is discharged through the vacuum suction filtration assembly; (2) Pressing filtration: The power output shaft of the first synchronous oil cylinder retracts, driving the rotary discharge plate to descend, so that the liquid in the material in the suction filtration cylinder is further filtered by the filter cake lifting plate to achieve pressing filtration. The filtrate enters the filtrate bin and is discharged through the vacuum suction filtration assembly; (3) Lift the filter cake and rotate for discharging: Start the second synchronous oil cylinder, make its power output end rise, and lift the filter cake lifting plate upward at a speed of 60 r / min to 80 r / min; Start the rotary motor, control the rotary discharge plate to rotate clockwise at a rate of 42 r / min. The scraper at the bottom of the rotary discharge plate scatters the filter cake on the filter cake lifting plate and discharges it to the material receiver through the discharge valve on the discharge port.

6. The continuous solid-liquid separation method according to claim 5, characterized in that, In step (1), before introducing the mixed material into the suction filtration cylinder, an inert gas is first introduced into the suction filtration cylinder through the first valve port of the feed valve to discharge the air in the suction filtration cylinder.

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