Automatic material treatment system of gas hydrate concentration device

Abstract

The utility model relates to the technical field of liquid food concentration, in particular to an automatic material processing system of a gas hydrate concentration device, which comprises a reaction kettle body, a screening box communicated with a discharging end of the reaction kettle body, a sorting component communicated with the screening box, a feeding pipe communicated with the upper end of the reaction kettle body, and a mass flow meter communicated with the feeding pipe. A liquid storage box is fixedly arranged on the outer wall of the lower end of the screening box, a spiral conveyor is installed at the upper end of the liquid storage box, the lower end of the spiral conveyor communicates with the liquid storage box, the discharging end of the upper end of the spiral conveyor communicates with the feeding pipe, a water pump is installed on the top face of the liquid storage box, and the water inlet end of the water pump communicates with the interior of the liquid storage box. Liquid materials in the liquid storage tank are pumped into the circulating pipe through the water pump and return to the reaction kettle body, liquid circulation is achieved, liquid waste is reduced, unreacted materials are conveyed from the liquid storage tank to the feeding pipe through the spiral conveyor installed at the upper end of the liquid storage tank and enter the reaction kettle body again, and the utilization rate of raw materials is increased.

Description

TECHNICAL FIELD

[0001] The utility model relates to liquid food concentration technical field, especially a kind of automatic material processing system of gas hydrate concentration device. BACKGROUND

[0002] Gas hydrate is a kind of crystal compound formed by gas molecules and liquid substance (such as water or liquid food) under certain conditions, widely used in liquid food concentration field, gas hydrate concentration method is formed by passing into gas in liquid food, hydrate crystal is formed under low temperature and high pressure, realizes the concentration of liquid food, has the advantages such as low temperature operation, low energy consumption, good quality maintenance.

[0003] Prior application with announcement number CN212236048U provides a kind of gas hydrate concentration device, by changing pressure and temperature, control the phase change equilibrium of gas and water, form hydrate crystal, realize low temperature concentration and zero on crystallization, solve the quality deterioration of zero on temperature heat concentration, the energy consumption of zero below temperature freezing concentration etc. Difficult problem;But in the process of use, it is found that the sorting precision of concentrated material is limited, it is difficult to distinguish hydrate crystal and impurity, resulting in low purity of finished product, unreacted material and liquid are not fully recycled, increase raw material cost and environmental burden, it is difficult to monitor and control the amount of feed, affect the stability of concentration process. UTILITY MODEL CONTENT

[0004] In view of the deficiencies of the prior art, the utility model provides an automatic material processing system of gas hydrate concentration device, the liquid material in the liquid storage tank is pumped into the circulating pipe by the water pump, and returns to the reaction kettle body, to realize the circulation of liquid, reduce liquid waste, the spiral conveyor installed on the upper end of the liquid storage tank transports the unreacted material from the liquid storage tank to the feed pipe, and reenters the inside of the reaction kettle body, to improve the utilization rate of raw materials.

[0005] To solve the above technical problems, the utility model provides the following technical scheme.

[0006] An automatic material processing system of gas hydrate concentration device, comprising a reaction kettle body, a screening box is communicated with the discharge end of the reaction kettle body, a sorting assembly is communicated with the screening box, a feed pipe is communicated with the upper end of the reaction kettle body, a mass flow meter is communicated with the feed pipe, a liquid storage tank is fixedly arranged on the lower end outer wall of the screening box, a spiral conveyor is installed on the upper end of the liquid storage tank, the lower end of the spiral conveyor is communicated with the liquid storage tank, the discharge end of the upper end of the spiral conveyor is communicated with the feed pipe, a water pump is installed on the top surface of the liquid storage tank, the water inlet end of the water pump is communicated with the inside of the liquid storage tank, a circulating pipe is communicated with the water outlet end of the water pump, and the upper end of the circulating pipe is communicated with the feed pipe.

[0007] Preferably, a first screen is rotatably connected to the inner wall of the screening box, and a second screen is rotatably connected to the other end of the inner part of the screening box, the first screen and the second screen are staggered, and the size of the screen hole of the first screen is larger than that of the second screen.

[0008] Preferably, a waste port is formed in one side of the screening box, one end of the first screen is located inside the waste port, and a discharge port is formed in the middle of the other side of the screening box, and one end of the second screen is located inside the discharge port.

[0009] Through the above technical scheme, the size of the screen hole of the first screen is larger, which is used to intercept large particle impurities, the impurities are discharged through the waste port, the materials passing through the first screen enter the second screen, the size of the screen hole of the second screen is smaller, which is used to separate unreacted fine particles and qualified hydrate crystals, and the qualified hydrate crystals are discharged through the discharge port.

[0010] Preferably, a push block is arranged in the screening box, an eccentric wheel is slidably connected to the protrusion of the push block, the upper and lower ends of the push block are rotatably connected to the bottom surface of the first screen and the top surface of the second screen respectively, a rotating shaft is fixedly arranged at the edge of the eccentric wheel, the outer circumferential walls of the two ends of the rotating shaft are rotatably connected to the screening box, a servo motor is mounted on the outer wall of the screening box through a mounting seat, and the transmission shaft of the servo motor is coaxially connected to the rotating shaft.

[0011] Through the above technical scheme, the servo motor drives the rotating shaft and the eccentric wheel to rotate, the eccentric wheel drives the push block to move up and down, the push block drives the first screen and the second screen to vibrate, the screening efficiency is improved, and the screen hole blockage is reduced.

[0012] Preferably, a reflux groove is arranged on the bottom surface of the screening box, a flow guide groove is formed in the middle bottom surface of the reflux groove, a reflux pipe is fixedly connected to the outer wall of the screening box, the reflux pipe is in communication with the flow guide groove, the reflux pipe is inclined, the other end of the reflux pipe is in communication with the lower end of the screw conveyor, and a filter screen is arranged at the connection between the screw conveyor and the liquid storage tank.

[0013] Through the above technical scheme, the unreacted fine particles are conveyed to the feeding pipe by the screw conveyor, and re-enter the reaction kettle body, thereby reducing the waste of raw materials.

[0014] Preferably, the sorting assembly comprises a sorting box, one end of the sorting box is in communication with the discharge port, the bottom surface of the sorting box is inclined, an open baffle is fixedly arranged in the middle of the sorting box, an adjusting block is slidably connected to the inside of the open baffle, a gas cylinder is mounted on the top surface of the sorting box through a mounting seat, and the piston rod of the gas cylinder is fixedly connected to the top surface of the adjusting block.

[0015] Through the technical scheme, the adjusting block is moved up and down through the piston rod of the cylinder, the height of the adjusting block is adjusted, the material separation density threshold is controlled, and the separation and separation of low-density, medium-density and high-density materials are realized.

[0016] Preferably, one end of the sorting box inside near the discharge port is provided with a medium-density tank, the other side of the sorting box inside the medium-density tank is provided with a finished product tank, the lower end of the finished product tank is provided with a waste liquid tank, the waste liquid tank is communicated with the medium-density tank, and one end of the waste liquid tank extends to the outside through the sorting box.

[0017] Through the technical scheme, the high-density impurities sink to the bottom of the sorting box, slide along the waste liquid tank and are discharged from the sorting box to the outside.

[0018] Preferably, the rear wall of the sorting box is communicated with a recovery pipe, the lower end of the recovery pipe is communicated with the liquid storage tank, and the finished product tank is communicated with a discharge pipe with a valve.

[0019] Through the technical scheme, the low-density hydrate crystal (finished product) jumps over the adjusting block, enters the finished product tank, and is discharged through the discharge pipe, thereby improving the output quality.

[0020] The utility model discloses the beneficial effects of:

[0021] 1. The raw material enters the reaction kettle body through the feed pipe, and the gas hydrate mixture is generated under high temperature and high pressure conditions. The mixture is transported to the screening box at the discharge end of the reaction kettle, the screening box performs preliminary screening on the material, separates materials of different particle sizes, and the sorting assembly further sorts the screened material to ensure the purity of the finished product. The liquid residue after screening flows into the liquid storage tank for temporary storage. The liquid material in the liquid storage tank is pumped into the circulating pipe by the water pump and finally returns to the reaction kettle body, realizing the circulation of the liquid and reducing the waste of the liquid. The spiral conveyor installed at the upper end of the liquid storage tank transports the unreacted material from the liquid storage tank to the feed pipe, reenters the reaction kettle body, improves the utilization rate of raw materials, and monitors the feed amount in real time by the mass flow meter connected to the feed pipe, ensuring the stability of the reaction conditions.

[0022] 2. The mixture enters the screening box from the reaction kettle body, the servo motor drives the rotating shaft and the eccentric wheel to rotate, the eccentric wheel pushes the push block to move up and down, the push block pushes the first screen and the second screen to vibrate, improves the screening efficiency and reduces the screen hole blockage, ensures the continuous and stable operation, makes the mixture pass through the first screen for preliminary screening, the first screen has larger screen hole size and is used for intercepting large particle impurities, the impurities are discharged through the waste port; the material passing through the first screen enters the second screen, the second screen has smaller screen hole size and is used for separating unreacted fine particles and qualified hydrate crystals, the qualified hydrate crystals are discharged through the discharge port, and the unreacted fine particles continue to fall; the liquid residue generated in the screening process flows into the reflux tank at the bottom of the screening box, enters the reflux pipe through the flow guide groove, and the reflux pipe delivers the liquid residue to the lower end of the screw conveyor, after filtering through the filter screen, the liquid is temporarily stored in the liquid storage tank, and the unreacted fine particles are conveyed to the feeding pipe through the screw conveyor and re-enter the reaction kettle body, thereby reducing the waste of raw materials; the liquid in the liquid storage tank is pumped into the circulating pipe by the water pump and finally returns to the reaction kettle body, realizing the recycling of the liquid.

[0023] 3. The qualified hydrate crystals screened by the screening box enter the sorting box through the discharge port, the bottom surface of the sorting box is inclined, the material flows along the inclined surface under the action of gravity, the opening baffle is arranged in the middle of the sorting box, the adjusting block moves up and down through the piston rod of the air cylinder, the height of the adjusting block is adjusted, the material sorting density threshold is controlled, and the low-density, medium-density and high-density materials are quickly layered and separated.

[0024] 4. The low-density hydrate crystals (finished products) jump over the adjusting block and enter the finished product tank and are discharged through the discharge pipe, the output quality is improved, the medium-density semi-finished products are intercepted by the opening baffle and the adjusting block and stay in the medium-density tank, the high-density impurities sink to the bottom surface in the sorting box and slide along the waste liquid tank and are discharged from the inside of the sorting box to the outside, the liquid in the medium-density tank is returned to the liquid storage tank through the recovery pipe, the liquid is recycled, and the use cost is reduced; suitable for concentrating various liquid foods, such as dairy products, fruit juice, beverages and the like, and low-temperature operation effectively maintains the nutritional ingredients and flavor of the food. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 It is a whole structure schematic view of the utility model;

[0026] Figure 2 It is a whole structure back perspective view of the utility model;

[0027] Figure 3 It is a mass flowmeter structure schematic view of the utility model;

[0028] Figure 4 It is a screening box structure internal schematic view of the utility model;

[0029] Figure 5 The utility model discloses a sorting box structure internal schematic view.

[0030] In the drawing: 1, reaction kettle body;2, screening box;3, sorting assembly;301, sorting box;302, open baffle;303, adjusting block;304, air cylinder;305, medium density tank;306, recovery pipe;307, waste liquid tank;308, discharge pipe;309, finished product tank;4, feed pipe;5, mass flow meter;6, liquid storage tank;7, screw conveyor;8, water pump;9, circulating pipe;10, first screen;11, second screen;12, waste material port;13, discharge port;14, push block;15, eccentric wheel;16, rotating shaft;17, servo motor;18, backflow tank;19, flow guide groove;20, backflow pipe. DETAILED DESCRIPTION

[0031] In order to make the above-mentioned purpose, features and advantages of the utility model more obvious and easy to understand, the specific embodiment of the utility model is explained in detail below with the attached drawings of the specification.

[0032] Example one

[0033] As Figures 1-4 The utility model provides a kind of automatic material handling system of gas hydrate concentration device, including reaction kettle body 1, the discharge end of reaction kettle body 1 is communicated with screening box 2, screening box 2 is communicated with sorting assembly 3, the upper end of reaction kettle body 1 is communicated with feed pipe 4, feed pipe 4 is communicated with mass flow meter 5, the outer wall of screening box 2 lower end is fixed with liquid storage tank 6, liquid storage tank 6 upper end is installed with screw conveyor 7, the lower end of screw conveyor 7 is communicated with liquid storage tank 6, the discharge end of screw conveyor 7 upper end is communicated with feed pipe 4, liquid storage tank 6 top surface is installed with water pump 8, the water inlet end of water pump 8 is communicated with liquid storage tank 6 inside, the water outlet end of water pump 8 is communicated with circulating pipe 9, and the upper end of circulating pipe 9 is communicated with feed pipe 4.

[0034] As Figure 4As shown, the inner wall of the screening box 2 is rotationally connected with the first screen 10, and the other opposite inner wall of the screening box 2 is rotationally connected with the second screen 11. That is, the first screen 10 and the second screen 11 are both installed in the interior of the screening box 2 and are respectively located at the opposite two side inner walls. The first screen 10 and the second screen 11 are staggered, the screen hole size of the first screen 10 is larger than that of the second screen 11, a waste port 12 is formed at one side of the screening box 2, one end of the first screen 10 is located inside the waste port 12, a discharge port 13 is formed at the middle of the other side of the screening box 2, and one end of the second screen 11 is located inside the discharge port 13. The screen hole size of the first screen 10 is relatively large, which is used for intercepting large particle impurities, the impurities are discharged through the waste port 12, the material passing through the first screen 10 enters the second screen 11, the screen hole size of the second screen 11 is relatively small, which is used for separating unreacted fine particles and qualified hydrate crystals, and the qualified hydrate crystals are discharged through the discharge port 13.

[0035] The screening box 2 is internally provided with a push block 14, the protruding part of the push block 14 is slidingly connected with an eccentric wheel 15, the upper and lower ends of the push block 14 are respectively rotationally connected with the bottom surface of the first screen 10 and the top surface of the second screen 11, the edge of the eccentric wheel 15 is fixedly provided with a rotating shaft 16, the outer circumferential walls of the two ends of the rotating shaft 16 are respectively rotationally connected with the screening box 2, the outer wall of the screening box 2 is installed with a servo motor 17 through a mounting seat, the transmission shaft of the servo motor 17 is coaxially connected with the rotating shaft 16; the servo motor 17 drives the rotating shaft 16 and the eccentric wheel 15 to rotate, the eccentric wheel 15 pushes the push block 14 to move up and down, the push block 14 pushes the first screen 10 and the second screen 11 to vibrate, thereby improving the screening efficiency and reducing the screen hole blockage.

[0036] The bottom surface of the screening box 2 is internally provided with a backflow groove 18, the middle bottom surface of the backflow groove 18 is provided with a flow guide groove 19, the outer wall of the screening box 2 is fixedly connected with a backflow pipe 20, the backflow pipe 20 is in communication with the flow guide groove 19, the backflow pipe 20 is in an inclined shape, the other end of the backflow pipe 20 is in communication with the lower end of the screw conveyor 7, and the connection part of the screw conveyor 7 and the liquid storage tank 6 is provided with a filter screen; the unreacted fine particles are conveyed to the feeding pipe 4 through the screw conveyor 7, and re-enter the reaction kettle body 1, thereby reducing the waste of raw materials.

[0037] Working principle: the raw materials enter the reaction kettle body 1 through the feeding pipe 4, and generate gas hydrate mixture (containing crystals, liquid residues and unreacted raw materials) under high temperature and high pressure conditions, the mixture is conveyed to the screening box 2 from the discharge end of the reaction kettle body 1, the screening box 2 performs preliminary screening on the mixture, separates materials with different particle sizes, and the sorting assembly 3 further sorts the screened materials, thereby ensuring the purity of the finished product.

[0038] The screened liquid residue (containing unreacted liquid and fine particle impurities) flows into the storage tank 6 for temporary storage. The liquid material in the storage tank 6 is pumped into the circulating pipe 9 by the water pump 8 and finally returns to the reaction kettle body 1, realizing the circulation of the liquid and reducing liquid waste. The screw conveyor 7 installed at the upper end of the storage tank 6 conveys the unreacted material from the storage tank 6 to the feed pipe 4 and reenters the reaction kettle body 1, improving the utilization rate of raw materials. The mass flow meter 5 connected to the feed pipe 4 monitors the feed quantity in real time, ensuring the stability of the reaction conditions.

[0039] After the mixed material enters the screening tank 2 from the reaction kettle body 1, the servo motor 17 drives the rotating shaft 16 and the eccentric wheel 15 to rotate, the eccentric wheel 15 pushes the push block 14 to move up and down, the push block 14 pushes the first screen 10 and the second screen 11 to vibrate, improving the screening efficiency and reducing the blockage of the screen holes, and ensuring continuous and stable operation.

[0040] The mixed material is subjected to preliminary screening through the first screen 10, which has relatively large screen hole sizes for intercepting large particle impurities, and the impurities are discharged through the waste port 12. The material passing through the first screen 10 enters the second screen 11, which has relatively small screen hole sizes for separating unreacted fine particles and qualified hydrate crystals. The qualified hydrate crystals are discharged through the discharge port 13, and the unreacted fine particles continue to fall. The liquid residue generated during the screening process flows into the reflux tank 18 at the bottom of the screening tank 2, enters the reflux pipe 20 through the flow guide tank 19, and is transported to the lower end of the screw conveyor 7. After filtration through the filter screen, the liquid is temporarily stored in the storage tank 6, and the unreacted fine particles are conveyed to the feed pipe 4 by the screw conveyor 7 and reenter the reaction kettle body 1, reducing raw material waste. The liquid in the storage tank 6 is pumped into the circulating pipe 9 by the water pump 8 and finally returns to the reaction kettle body 1, realizing the recycling of the liquid.

[0041] Example Two

[0042] As shown in Figure 1 , Figure 2 , Figure 3 and Figure 5 , on the basis of Example One, the sorting assembly 3 includes a sorting tank 301, one end of which is connected to the discharge port 13. The bottom surface of the sorting tank 301 is inclined, and an open baffle 302 is fixedly arranged in the middle of the sorting tank 301. An adjusting block 303 is slidably connected inside the open baffle 302. A gas cylinder 304 is installed on the top surface of the sorting tank 301 through a mounting seat, and the piston rod of the gas cylinder 304 is fixedly connected to the top surface of the adjusting block 303. The adjusting block 303 moves up and down through the piston rod of the gas cylinder 304 to adjust the height of the adjusting block 303, control the material sorting density threshold, and realize the layering and separation of low-density, medium-density, and high-density materials.

[0043] The middle density groove 305 is arranged at one end of the sorting box 301 close to the discharge port 13, and a finished product groove 309 is arranged at the other side of the sorting box 301, and the finished product groove 309 is provided with a waste liquid groove 307 at the lower end, the waste liquid groove 307 is communicated with the middle density groove 305, and one end of the waste liquid groove 307 extends to the outside through the sorting box 301; the high-density impurities sink to the bottom surface of the sorting box 301, slide along the waste liquid groove 307 and are discharged to the outside from the sorting box 301.

[0044] The sorting box 301 is communicated with a recovery pipe 306 at the rear wall, the lower end of the recovery pipe 306 is communicated with the liquid storage tank 6, and the finished product groove 309 is communicated with a discharge pipe 308 with a valve; the low-density hydrate crystal (finished product) jumps over the adjusting block 303, enters the finished product groove 309 and is discharged through the discharge pipe 308, so that the output quality is improved.

[0045] In use, the qualified hydrate crystal which is preliminarily screened through the screening box 2 enters the sorting box 301 through the discharge port 13, the bottom surface of the sorting box 301 is inclined, the material flows along the inclined surface under the action of gravity, the opening baffle 302 is arranged at the middle part of the sorting box 301, the adjusting block 303 moves up and down through the piston rod of the air cylinder 304, the height of the adjusting block 303 is adjusted, the material separation density threshold is controlled, and the rapid layering and separation of the low-density, middle-density and high-density materials are realized.

[0046] The low-density hydrate crystal (finished product) jumps over the adjusting block 303, enters the finished product groove 309 and is discharged through the discharge pipe 308, so that the output quality is improved, the middle-density semi-finished product is intercepted by the opening baffle 302 and the adjusting block 303 and stays in the middle density groove 305, the high-density impurities sink to the bottom surface of the sorting box 301, slide along the waste liquid groove 307 and are discharged to the outside from the sorting box 301, the liquid in the middle density groove 305 is returned to the liquid storage tank 6 through the recovery pipe 306, the liquid circulation is realized, and the use cost is reduced.

[0047] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this, any skilled person in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. An automatic material handling system of a gas hydrate concentration device, comprising a reaction kettle body (1), a screening box (2) is communicated with the discharge end of the reaction kettle body (1), and a sorting assembly (3) is communicated with the screening box (2), characterized in that: The upper end of the reaction kettle body (1) is communicated with a feeding pipe (4), the feeding pipe (4) is communicated with a mass flow meter (5), the lower end of the screening box (2) is fixedly provided with a liquid storage tank (6), the upper end of the liquid storage tank (6) is provided with a screw conveyor (7), the lower end of the screw conveyor (7) is communicated with the liquid storage tank (6), the upper end of the screw conveyor (7) is communicated with the feeding pipe (4), the top surface of the liquid storage tank (6) is provided with a water pump (8), the water inlet end of the water pump (8) is communicated with the inside of the liquid storage tank (6), the water outlet end of the water pump (8) is communicated with a circulating pipe (9), and the upper end of the circulating pipe (9) is communicated with the feeding pipe (4).

2. The automated material handling system for a gas hydrate concentration plant of claim 1, wherein: A first screen (10) is rotatably connected to an inner wall of the screening box (2), and a second screen (11) is rotatably connected to another opposite inner wall of the screening box (2); the first screen (10) and the second screen (11) are staggered; and the size of the screen hole of the first screen (10) is larger than that of the second screen (11).

3. The automated material handling system for a gas hydrate concentration plant of claim 2, wherein: A waste port (12) is formed in one side of the screening box (2), and one end of the first screen (10) is located inside the waste port (12); a discharge port (13) is formed in the middle of the other side of the screening box (2), and one end of the second screen (11) is located inside the discharge port (13).

4. The automated material handling system for a gas hydrate concentration plant of claim 3, wherein: The screening box (2) is provided with a push block (14), the protruding part of the push block (14) is slidably connected with an eccentric wheel (15), the upper and lower ends of the push block (14) are rotatably connected with the bottom surface of the first screen (10) and the top surface of the second screen (11) respectively, the edge of the eccentric wheel (15) is fixedly provided with a rotating shaft (16), the two ends of the rotating shaft (16) are rotatably connected with the screening box (2) respectively, and the outer peripheral wall of the rotating shaft (16) is rotatably connected with the screening box (2) through a mounting seat.

5. The automated material handling system for a gas hydrate concentration plant as recited in claim 4, wherein: The bottom surface of the screening box (2) is provided with a backflow groove (18), the middle bottom surface of the backflow groove (18) is provided with a flow guide groove (19), the outer wall of the screening box (2) is fixedly connected with a backflow pipe (20), the backflow pipe (20) is communicated with the flow guide groove (19), the backflow pipe (20) is inclined, the other end of the backflow pipe (20) is communicated with the lower end of the screw conveyor (7), and the connection part between the screw conveyor (7) and the liquid storage tank (6) is provided with a filter screen.

6. The automated material handling system for a gas hydrate concentration plant as recited in claim 1, wherein: The sorting assembly (3) comprises a sorting box (301), one end of the sorting box (301) is communicated with the discharge port (13), the bottom surface of the sorting box (301) is inclined, the middle of the sorting box (301) is fixedly provided with an open baffle (302), the inside of the open baffle (302) is slidably connected with an adjusting block (303), the top surface of the sorting box (301) is provided with a gas cylinder (304) through a mounting seat, and the piston rod of the gas cylinder (304) is fixedly connected with the top surface of the adjusting block (303).

7. The automated material handling system for a gas hydrate concentration plant of claim 6, wherein: The sorting box (301) is internally provided with a medium density tank (305) near one end of the discharge port (13), and is internally provided with a finished product tank (309) on the other side of the medium density tank (305), and the finished product tank (309) is provided with a waste liquid tank (307) at the lower end, the waste liquid tank (307) is communicated with the medium density tank (305), and one end of the waste liquid tank (307) extends to the outside through the sorting box (301).

8. The automated material handling system for a gas hydrate concentration plant of claim 7, wherein: The rear wall of the sorting box (301) is communicated with a recovery pipe (306), the lower end of the recovery pipe (306) is communicated with a liquid storage tank (6), and the finished product tank (309) is communicated with a discharge pipe (308) with a valve.

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