A system and process for converting, treating and reusing food waste

Abstract

The present invention relates to a system and process for converting, treating and reusing food waste. A centrifugal separation shaft is installed in an integrated treatment tank. The top of the centrifugal separation shaft is connected to a centrifugal separation motor installed above the integrated treatment tank. The bottom of the centrifugal separation shaft is installed on a supporting isolation platform. A heating chamber is arranged in the middle of the inner cavity of the integrated treatment tank. A steam heating pipe connected to the output end of a steam generator is arranged in the heating chamber. A liquid suction pipe with a second solenoid valve and a first suction pump is arranged on one side of the upper part of the integrated treatment tank. A steam exhaust pipe is arranged on the supporting isolation platform. The bottom of the steam exhaust pipe is connected to a one-way exhaust valve installed below the supporting isolation platform. The one-way exhaust valve is connected to the output end of the steam generator through a steam exhaust pipe. The bottom of the integrated treatment tank is connected to the second suction pump through a pipe with a third solenoid valve. The second suction pump is connected to a liquid inlet pipe of a three-phase separator. The collected food waste is treated to obtain an organic composite carbon source.

Description

Technical Field

[0001] The present invention belongs to the technical field of waste recycling and reuse, and specifically relates to a system and process for converting, treating and reusing food waste. Background Art

[0002] Food waste refers to waste generated in residents' daily life, food processing, catering services, and corporate catering activities, including discarded vegetable leaves, leftovers, fruit peels, eggshells, soup, rice, bones, etc. Its main sources are family kitchens, restaurants, canteens, markets, and other industries related to food processing. Food waste contains extremely high moisture and organic matter, and is easy to rot and produce a foul odor. The moisture content of food waste is 80-90%.

[0003] The traditional method of treating food waste adopts the method of solid-liquid separation to separate wastewater and waste solids, and then conducts a single treatment and recycling, and finally produces solid fertilizer or liquid fertilizer, etc. The scope of use of the products of the traditional treatment method is limited. Studies have shown that food waste can be converted into carbon resources through anaerobic digestion. In the process of reducing nitrate nitrogen to nitrogen gas in the sewage treatment process, microorganisms need an organic carbon source. Therefore, in recent years, research on the conversion of organic carbon sources from food waste has emerged. The traditional method is to pretreat food waste in hot water within 180°C. Hydrothermal pretreatment can effectively increase the content of soluble organic matter in food waste liquid. Among them, the content of protein and ammonia nitrogen will also increase when the hydrothermal temperature is increased. Due to the large value of SCOD / TN, it will not introduce new nitrogen pollutants as a denitrification carbon source. However, the ordinary method of recovering carbon sources from food waste requires the addition of sludge and other garbage as a carrier, and the overall process is complicated, the process parameters are difficult to control, the reaction time is long, and the output rate is low, which is not suitable for large-scale production and use.

[0004] Therefore, a food waste conversion, treatment and reuse system and process with a simple structure, easy operation, high efficiency and convenience, adopting an integrated closed biochemical reaction mode, strong overall continuity, adopting a circular recycling treatment mode, thorough treatment, significantly improved recycling rate, simple and easy-to-operate process is provided, which has broad market prospects. Summary of the invention

[0005] In view of the shortcomings of the prior art, the present invention provides a food waste conversion, treatment and reuse system and process with a simple structure, easy operation, high efficiency and convenience, adopting an integrated closed biochemical reaction mode, strong overall continuity, adopting a circulating recovery treatment mode, thorough treatment, significantly improved recycling rate, simple and easy-to-operate process, which is used to overcome the defects in the prior art.

[0006] The technical solution of the present invention is implemented as follows: a food waste conversion, treatment and reuse system includes a feed hopper, the lower part of the feed hopper is connected to a horizontal crushing barrel, the output end of the horizontal crushing barrel is connected to an integrated processing tank through a pipeline with a first solenoid valve, a centrifugal separation shaft is installed in the integrated processing tank, the top of the centrifugal separation shaft is connected to a centrifugal separation motor installed above the integrated processing tank, the bottom of the centrifugal separation shaft is installed on a supporting isolation platform, a heating chamber is provided in the middle of the inner cavity of the integrated processing tank, a steam heating pipe connected to the output end of a steam generator is provided in the heating chamber, a liquid suction pipe with a second solenoid valve and a first suction pump is provided on one side of the upper part of the integrated processing tank, a steam exhaust pipe is provided on the supporting isolation platform, the bottom of the steam exhaust pipe is connected to a one-way exhaust valve installed below the supporting isolation platform, the one-way exhaust valve is connected to the output end of the steam generator through a steam exhaust pipeline, the bottom of the integrated processing tank is connected to the second suction pump through a pipeline with a third solenoid valve, and the second suction pump is connected to the liquid inlet pipe of the three-phase separator.

[0007] Furthermore, a crushing motor is provided on one side of the horizontal crushing barrel, and the output end of the crushing motor is connected to the crushing rotating shaft installed in the crushing barrel, and crushing blades are staggered on the crushing rotating shaft. The output end of the steam generator is connected to the bottom of the horizontal crushing barrel through a pipeline with a crushing heating control one-way valve.

[0008] Furthermore, the first solenoid valve is arranged on the upper part of one side of the integrated processing tank, and the second solenoid valve is arranged on the upper part of the other side of the integrated processing tank. The setting height of the second solenoid valve is lower than the setting height of the first solenoid valve, and a liquid level meter is arranged in the inner cavity of the integrated processing tank inside the second solenoid valve.

[0009] Furthermore, a gas suction pipe with a fourth solenoid valve is provided on one side of the centrifugal separation motor, and a raw material filling pipe and a liquid injection pipe with a fifth solenoid valve are provided on the other side of the centrifugal separation motor. A support box is installed at the bottom of the support isolation table, and the outer wall of the support isolation table is an inclined structure. The bottom of the integrated processing tank is fixedly connected to the top surface of the support box outside the circumference of the support isolation table.

[0010] Furthermore, the steam heating pipe is connected to the output end of the steam generator through a first steam solenoid valve, the steam exhaust pipe is connected to the output end of the steam generator through a second steam solenoid valve, and a protective shell is provided on the outside of the steam generator.

[0011] Furthermore, a power shell is provided on one side of the three-phase separator, and a power shaft connected to the output end of the reduction motor is installed in the power shell. The power shaft is connected to the three-phase separation shaft installed in the three-phase separator, and a discharge port connected to the liquid inlet pipe is provided on the three-phase separation shaft. A sealed bearing is provided at the other end of the three-phase separation shaft, and the liquid inlet pipe is sleeved on the inner side of the sealed bearing. An oil discharge pipe, a water discharge pipe and a slag discharge pipe are respectively provided on the three-phase separator, and the water discharge pipe is connected to the top of the sedimentation tank. A circulating suction pump is provided at the bottom of the sedimentation tank, and the circulating suction pump is connected to the top of the integrated treatment tank through an external reflux pipe. An oil removal suction pump is provided on the upper part of the inner cavity of the sedimentation tank.

[0012] A process for converting, treating and reusing food waste, the process comprising the following steps:

[0013] S1. Transport the food waste to the horizontal crushing barrel through the feed hopper for crushing;

[0014] S2. The crushed food waste is transported to the integrated processing tank, detergent is added, and then the steam generator is turned on. The high-temperature steam is transported to the bottom of the integrated processing tank through the steam exhaust pipe, the one-way exhaust valve and the steam exhaust pipe, and the crushed food waste is steam-washed. At the same time, the high-temperature steam is transported to the steam heating pipe through the steam heating pipe to heat the heating chamber, and the centrifugal separation motor is turned on to drive the centrifugal separation shaft to perform the centrifugal separation operation;

[0015] S3. After the high-temperature and high-pressure water washing is completed, the second solenoid valve and the first suction pump are opened. During the high-temperature and high-pressure water washing process, the liquid level is always maintained above the liquid inlet position of the second solenoid valve. The upper oil after centrifugal separation is extracted and recovered to the waste oil collection pool by the first suction pump. Then the raw material filling pipe is opened, and the biochemical reaction additive is added to the integrated treatment tank. At the same time, the high-temperature steam is transported to the steam heating pipe through the steam heating pipe to heat the heating chamber, and the gas in the integrated treatment tank is extracted through the gas suction pipeline with the fourth solenoid valve, so that it undergoes a biochemical reaction under anaerobic conditions to obtain an initial organic composite carbon source;

[0016] S4. After the biochemical reaction is completed, the third solenoid valve is opened, and the mixture in the integrated treatment tank is sucked into the three-phase separator through the second suction pump for oil, water and slag three-phase separation. The oil is discharged through the oil discharge pipeline and recovered to the waste oil collection pool, the slag is discharged through the slag discharge pipeline and recovered, and the water is discharged through the drainage pipeline and collected into the sedimentation tank;

[0017] S5. After the sedimentation tank is left to stand, the turbid matter at the bottom is sucked out by a circulating suction pump and transported to the integrated treatment tank through an external reflux pipe to participate in the circulation reaction. The upper oil is sucked out by an oil removal suction pump and recovered to the waste oil collection pool. Finally, the remaining organic composite carbon source liquid is bottled as a finished product.

[0018] Furthermore, the crushing particle size in S1 is not greater than 0.5 cm, and in S2, the detergent is alcohol with a mass concentration of 85%, the added amount and the mass ratio of the liquid in the integrated processing tank is 1:100, the steam water washing time is 1 hour, and the heating temperature of the heating chamber is controlled at 50 degrees Celsius.

[0019] Furthermore, in S3, after the high-temperature and high-pressure water washing is completed, the mixture is allowed to stand for 20-30 minutes, and the heating temperature of the heating chamber is controlled at 30-38 degrees Celsius.

[0020] Furthermore, in S3, the biochemical reaction additive is a mixture of activated composite bacteria and microbial culture medium. By adding the additive, the pH value of the biochemical reaction under anaerobic conditions is adjusted to 5.5-7, and the biochemical reaction time under anaerobic conditions is 5-6 days.

[0021] The present invention has the following positive effects:

[0022] 1. The present invention processes the collected food waste to obtain an organic composite carbon source. The present invention adopts an integrated processing tank and uses steam to clean the food waste, so that the oil in the food waste is dissolved and floats on the water surface. The oil on the water surface is then separated, thereby achieving the purpose of reducing the oil in the food waste. Finally, a biochemical reaction is carried out under an anaerobic state, which can increase the maximum yield of short-chain fatty acids produced during the reaction, thereby increasing the content of the organic composite carbon source converted subsequently.

[0023] 2. The present invention uses an external reflux pipeline to suck the turbid matter at the bottom of the sedimentation tank and then re-send it into the integrated treatment tank for secondary treatment, thereby improving the recovery and conversion rate of food waste. Through three oil extractions and one waste residue collection, the comprehensive transformation of food waste is achieved. The high organic content of food waste is used in combination with anaerobic biochemical technology to perform anaerobic hydrolysis and biochemical treatment of food waste, and the operating conditions of the reaction stage are controlled to produce volatile organic acids, mainly including acetic acid, propionic acid, butyric acid, valeric acid and ethanol. It can not only solve the problems of high cost and high toxicity of traditional carbon sources such as methanol and acetic acid, but also realize the reduction, green recycling, harmlessness, application and conservation of food waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the structure of the system components of the present invention.

[0025] Figure 2 Schematic diagram of the internal structure of the system components of the present invention.

[0026] Figure 3 It is a schematic diagram of the system framework structure of the present invention.

[0027] Figure 4 It is a schematic diagram of the operating state structure of the present invention. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] In the following description of the invention, it should be noted that the terms "upper", "lower", "left", "right", "inner", "outer", etc., indicating directions or positional relationships, are based on directions or positional relationships shown in the drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. The term "connection" only indicates the connection between devices and has no special meaning.

[0030] Specific embodiments refer to Figure 1 , 2 , 3, and 4, a system for converting, treating, and reusing food waste comprises a feed hopper 2, wherein the lower portion of the feed hopper 2 is connected to a horizontal crushing barrel 1, and the output end of the horizontal crushing barrel 1 is connected to an integrated processing tank 5 via a pipeline with a first solenoid valve 4, a centrifugal separation shaft 26 is installed in the integrated processing tank 5, the top of the centrifugal separation shaft 26 is connected to a centrifugal separation motor 6 installed above the integrated processing tank 5, and the bottom of the centrifugal separation shaft 26 is installed on a supporting isolation platform 28, and a heating chamber 27 is arranged in the middle of the inner cavity of the integrated processing tank 5, and an output port connected to a steam generator 32 is arranged in the heating chamber 27. A steam heating pipe 11 is connected to the outlet end, a liquid suction pipe with a second solenoid valve 22 and a first suction pump 23 is arranged on one side of the upper part of the integrated processing tank 5, a steam exhaust pipe 29 is arranged on the supporting isolation platform 28, the bottom of the steam exhaust pipe 29 is connected to a one-way exhaust valve 30 installed under the supporting isolation platform 28, the one-way exhaust valve 30 is connected to the output end of the steam generator 32 through a steam exhaust pipe 31, the bottom of the integrated processing tank 5 is connected to the second suction pump 16 through a pipe with a third solenoid valve 14, and the second suction pump 16 is connected to the liquid inlet pipe 15 of the three-phase separator 17.

[0031] A crushing motor 3 is provided on one side of the horizontal crushing barrel 1, and the output end of the crushing motor 3 is connected to a crushing rotating shaft 24 installed in the crushing barrel 1, and crushing blades 25 are staggered on the crushing rotating shaft 24. The output end of the steam generator 32 is connected to the bottom of the horizontal crushing barrel 1 through a pipeline with a crushing heating control one-way valve. The first solenoid valve 4 is provided on the upper part of one side of the integrated processing tank 5, and the second solenoid valve 22 is provided on the upper part of the other side of the integrated processing tank 5. The setting height of the second solenoid valve 22 is lower than the setting height of the first solenoid valve 4, and a liquid level meter 8 is provided in the inner cavity of the integrated processing tank 5 inside the second solenoid valve 22.

[0032] A gas suction pipe with a fourth solenoid valve 7 is provided on one side of the centrifugal motor 6, and a raw material filling pipe 9 and a liquid injection pipe with a fifth solenoid valve 10 are provided on the other side of the centrifugal motor 6. A support box 13 is installed at the bottom of the support isolation platform 28, and the outer wall of the support isolation platform 28 is in an inclined structure. The bottom of the integrated processing tank 5 is fixedly connected to the top surface of the support box 13 outside the circumference of the support isolation platform 28. The steam heating pipe 11 is connected to the output end of the steam generator 32 through the first steam solenoid valve 33, and the steam exhaust pipe 31 is connected to the output end of the steam generator 32 through the second steam solenoid valve 34. A protective shell 12 is provided outside the steam generator 32.

[0033] A power shell 18 is provided on one side of the three-phase separator 17, and a power shaft 37 connected to the output end of the reduction motor 38 is installed in the power shell 18. The power shaft 37 is connected to the three-phase separation shaft 35 installed in the three-phase separator 17. A discharge port 36 connected to the liquid inlet pipe 15 is provided on the three-phase separation shaft 35. A sealed bearing 39 is provided at the other end of the three-phase separation shaft 35. The liquid inlet pipe 15 is sleeved on the inner side of the sealed bearing 39. An oil discharge pipe 19, a water discharge pipe 20 and a slag discharge pipe 21 are respectively provided on the three-phase separator 17. The water discharge pipe 20 is connected to the top of the sedimentation tank 40. A circulating suction pump 41 is provided at the bottom of the sedimentation tank 40. The circulating suction pump 41 is connected to the top of the integrated processing tank 5 through an external reflux pipe 43. An oil removal suction pump 42 is provided on the upper part of the inner cavity of the sedimentation tank 40.

[0034] A process for converting, treating and reusing food waste, the process comprising the following steps:

[0035] S1, conveying the food waste to the horizontal crushing barrel 1 through the feed hopper 2 for crushing.

[0036] S2. The crushed food waste is transported to the integrated processing tank 5, detergent is added, and then the steam generator 32 is turned on. The high-temperature steam is transported to the bottom of the integrated processing tank 5 through the steam exhaust pipe 31, the one-way exhaust valve 30 and the steam exhaust pipe 29, and the crushed food waste is steam-washed. At the same time, the high-temperature steam is transported to the steam heating pipe 11 through the steam heating pipe 11 to heat the heating chamber 27. At the same time, the centrifugal separation motor 6 is turned on to drive the centrifugal separation shaft 26 to perform the centrifugal separation operation.

[0037] S3. After completing the high-temperature and high-pressure water washing, open the second solenoid valve 22 and the first suction pump 23. During the high-temperature and high-pressure water washing process, the liquid level is always maintained above the liquid inlet position of the second solenoid valve 22. The upper oil after centrifugal separation is extracted and recovered to the waste oil collection pool through the first suction pump 23. Then, the raw material filling pipe 9 is opened, and the biochemical reaction additive is added to the integrated treatment tank 5. At the same time, high-temperature steam is transported to the steam heating pipe 11 through the steam heating pipe 11 to heat the heating chamber 27, and the gas in the integrated treatment tank 5 is extracted through the gas suction pipe with the fourth solenoid valve 7, so that it undergoes a biochemical reaction under anaerobic conditions to obtain an initial organic composite carbon source.

[0038] S4. After the biochemical reaction is completed, the third solenoid valve 14 is opened, and the mixture in the integrated treatment tank 5 is sucked into the three-phase separator 17 through the second suction pump 16 for oil, water and slag three-phase separation. The oil is discharged through the oil discharge pipe 19 and recovered to the waste oil collection pool, the slag is discharged through the slag discharge pipe 21 and recovered, and the water is discharged through the drainage pipe 20 and the liquid is collected to the sedimentation tank 40.

[0039] S5. After the sedimentation tank 40 is left to stand, the turbid matter at the bottom is sucked out by the circulating suction pump 41 and transported to the integrated treatment tank 5 through the external reflux pipe 43 to participate in the circulation reaction. The upper oil is sucked out by the oil removal suction pump 42 and recovered to the waste oil collection tank. Finally, the remaining organic composite carbon source liquid is bottled as a finished product.

[0040] In the S1, the crushing particle size is not greater than 0.5 cm. In S2, the detergent is an alcohol with a mass concentration of 85%, and the added amount is 1:100 to the liquid mass ratio in the integrated treatment tank 5. The steam water washing time is 1 hour, and the heating temperature of the heating chamber 27 is controlled at 50 degrees Celsius. In the S3, after the high-temperature and high-pressure water washing is completed, it is left to stand for 20-30 minutes, and the heating temperature of the heating chamber 27 is controlled at 30-38 degrees Celsius. In the S3, the biochemical reaction additive is a mixture of activated composite bacteria and microbial culture medium. By adding the additive, the pH value of the biochemical reaction under anaerobic conditions is adjusted to 5.5-7, and the biochemical reaction time under anaerobic conditions is 5-6 days.

[0041] During specific operation, the food waste is firstly cleaned and crushed to raw materials below 0.5 cm suitable for anaerobic biochemical treatment, and the steam heating tube 11 is used for aeration heating and the steam heating tube 11 is used to heat the heating chamber 27. Composite bacteria and microbial culture medium are added, the pH value is adjusted, and the centrifugal separation shaft 26 is driven to perform centrifugal separation operations to enhance the synergistic effect of microorganisms. The three-phase separator 17 has a centrifugal speed of 8000-10000 rpm, and performs three-phase separation of oil, water (rich in liquid carbon source after fermentation), and slag, which are then processed and recycled. The separated water is further precipitated by static sedimentation to further separate oil and grease, and the organic acid-rich liquid is continuously fermented to obtain a liquid, so that the fermentation produces acetic acid, propionic acid, butyric acid, valeric acid, ethanol and other products that are easy for microorganisms to use.

[0042] There is a large amount of oil in the food waste, and the presence of oil will affect the biochemical reaction process in the above steps. The higher the oil content, the smaller the maximum yield of short-chain fatty acids produced by the biochemical reaction of the food waste. Short-chain fatty acids are part of the carbon source, which leads to a decrease in the content of carbon sources converted by the food waste in the subsequent production process. Therefore, the present invention adopts a three-time degreasing method in which the upper oil liquid after centrifugal separation is extracted and recovered to the waste oil collection pool by the first suction pump 23, the oil is discharged and recovered to the waste oil collection pool through the oil discharge pipe 19, and the upper oil liquid is sucked by the oil removal suction pump 42. The proposed oil can be recycled such as soap, fuel, etc.

[0043] As another implementation of the present invention, the machine-state composite carbon source liquid can be converted again before the finished product is filled. The bottom turbidity is sucked out by the circulating suction pump 41, and transported to the integrated treatment tank 5 through the external reflux pipe 43 to participate in the circulation reaction, thereby improving the conversion and utilization efficiency of the food waste. It can also be subjected to a purity improvement operation again, and the COD value of the production carbon source is first measured using a COD measuring instrument. After measurement, a COD regulating liquid is then added to the production carbon source, wherein the COD regulating liquid can be one or more of methanol, sodium acetate, sodium acetate, and glucose.

[0044] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A system for converting, treating and reusing food waste, comprising a feed hopper (2), characterized in that: The lower part of the feed hopper (2) is connected to the horizontal crushing barrel (1), and the output end of the horizontal crushing barrel (1) is connected to the integrated processing tank (5) through a pipeline with a first electromagnetic valve (4). A centrifugal separation shaft (26) is installed in the integrated processing tank (5), and the top of the centrifugal separation shaft (26) is connected to a centrifugal separation motor (6) installed above the integrated processing tank (5). The bottom of the centrifugal separation shaft (26) is installed on a supporting isolation platform (28). A heating chamber (27) is provided in the middle of the inner cavity of the integrated processing tank (5), and a A steam heating pipe (11) is connected to the output end of the steam generator (32); a liquid suction pipe with a second solenoid valve (22) and a first suction pump (23) is arranged on one side of the upper part of the integrated processing tank (5); a steam exhaust pipe (29) is arranged on the supporting isolation platform (28); the bottom of the steam exhaust pipe (29) is connected to a one-way exhaust valve (30) installed below the supporting isolation platform (28); the one-way exhaust valve (30) is connected to the output end of the steam generator (32) through a steam exhaust pipe (31); the bottom of the integrated processing tank (5) is connected to the one-way exhaust valve (30) installed below the supporting isolation platform (28); The pipeline of the third solenoid valve (14) is connected to the second suction pump (16), and the second suction pump (16) is connected to the liquid inlet pipe (15) of the three-phase separator (17); a power shell (18) is provided on one side of the three-phase separator (17), and a power shaft (37) connected to the output end of the reduction motor (38) is installed in the power shell (18), and the power shaft (37) is connected to the three-phase separation shaft (35) installed in the three-phase separator (17), and the three-phase separation shaft (35) is provided with a discharge port (36) connected to the liquid inlet pipe (15). A sealed bearing (39) is provided at the other end of (35), and the liquid inlet pipe (15) is sleeved on the inner side of the sealed bearing (39). An oil discharge pipe (19), a water discharge pipe (20) and a slag discharge pipe (21) are respectively provided on the three-phase separator (17). The water discharge pipe (20) is connected to the top of the sedimentation tank (40). A circulating suction pump (41) is provided at the bottom of the sedimentation tank (40). The circulating suction pump (41) is connected to the top of the integrated treatment tank (5) through an external reflux pipe (43). An oil removal suction pump (42) is provided at the upper part of the inner cavity of the sedimentation tank (40).

2. The food waste conversion, treatment and reuse system according to claim 1 is characterized in that: A crushing motor (3) is provided on one side of the horizontal crushing barrel (1), the output end of the crushing motor (3) is connected to a crushing rotating shaft (24) installed in the crushing barrel (1), crushing blades (25) are staggeredly distributed on the crushing rotating shaft (24), and the output end of the steam generator (32) is connected to the bottom of the horizontal crushing barrel (1) through a pipeline with a crushing heating control one-way valve.

3. The food waste conversion, treatment and reuse system according to claim 1 is characterized in that: The first solenoid valve (4) is arranged at the upper part of one side of the integrated processing tank (5), and the second solenoid valve (22) is arranged at the upper part of the other side of the integrated processing tank (5). The setting height of the second solenoid valve (22) is lower than the setting height of the first solenoid valve (4). A liquid level meter (8) is arranged in the inner cavity of the integrated processing tank (5) inside the second solenoid valve (22).

4. The food waste conversion, treatment and reuse system according to claim 1 is characterized in that: A gas suction pipe with a fourth solenoid valve (7) is provided on one side of the centrifugal separation motor (6), and a raw material filling pipe (9) and a liquid injection pipe with a fifth solenoid valve (10) are provided on the other side of the centrifugal separation motor (6). A support box (13) is installed at the bottom of the support isolation platform (28), and the outer wall of the support isolation platform (28) is in an inclined structure. The bottom of the integrated processing tank (5) is fixedly connected to the top surface of the support box (13) outside the circumference of the support isolation platform (28).

5. The food waste conversion, treatment and reuse system according to claim 1 is characterized in that: The steam heating pipe (11) is connected to the output end of the steam generator (32) via a first steam solenoid valve (33), the steam exhaust pipe (31) is connected to the output end of the steam generator (32) via a second steam solenoid valve (34), and a protective shell (12) is provided outside the steam generator (32).

6. A process for converting, treating and reusing food waste, characterized in that: The process includes the following steps: S1, conveying the food waste to the horizontal crushing barrel (1) through the feed hopper (2) for crushing; S2, conveying the crushed food waste to the integrated processing tank (5), adding detergent, and then turning on the steam generator (32), so that high-temperature steam is conveyed to the bottom of the integrated processing tank (5) through the steam exhaust pipe (31) via the one-way exhaust valve (30) and the steam exhaust pipe (29), and steam washing is performed on the crushed food waste. At the same time, the high-temperature steam is conveyed to the steam heating pipe (11) through the steam heating pipe (11) to heat the heating chamber (27), and at the same time, the centrifugal separation motor (6) is turned on to drive the centrifugal separation shaft (26) to perform a centrifugal separation operation; S3. After the high-temperature and high-pressure water washing is completed, the second solenoid valve (22) and the first suction pump (23) are opened. During the high-temperature and high-pressure water washing process, the liquid level is always maintained above the liquid inlet position of the second solenoid valve (22). The upper oil after centrifugal separation is extracted and recovered into the waste oil collection pool through the first suction pump (23). Then, the raw material filling pipe (9) is opened to add the biochemical reaction additive into the integrated processing tank (5). At the same time, high-temperature steam is transported to the steam heating pipe (11) through the steam heating pipe (11) to heat the heating chamber (27). The gas in the integrated processing tank (5) is extracted through the gas suction pipe with the fourth solenoid valve (7), so that the gas undergoes a biochemical reaction under anaerobic conditions, thereby obtaining an initial organic composite carbon source. S4. After the biochemical reaction is completed, the third solenoid valve (14) is opened, and the mixture in the integrated treatment tank (5) is sucked into the three-phase separator (17) through the second suction pump (16) for separation of oil, water and slag. The oil is discharged through the oil discharge pipe (19) and recovered to the waste oil collection pool, the slag is discharged through the slag discharge pipe (21) and recovered, and the water is discharged through the drainage pipe (20) and the collected liquid is discharged to the sedimentation tank (40); S5. After the sedimentation tank (40) is left to stand, the turbid matter at the bottom is sucked out by the circulating suction pump (41) and transported to the integrated treatment tank (5) through the external reflux pipe (43) to participate in the circulation reaction. The upper oil is sucked out by the oil removal suction pump (42) and recovered to the waste oil collection tank. Finally, the remaining organic composite carbon source liquid is bottled as a finished product.

7. The process for converting, treating and reusing food waste according to claim 6, characterized in that: The crushed particle size in S1 is not greater than 0.5 cm. In S2, the detergent is alcohol with a mass concentration of 85%, and the ratio of the added amount to the mass of the liquid in the integrated processing tank (5) is 1:

100. The steam water washing time is 1 hour, and the heating temperature of the heating chamber (27) is controlled at 50 degrees Celsius.

8. The process for converting, treating and reusing food waste according to claim 6, characterized in that: In the above-mentioned S3, after the high-temperature and high-pressure water washing is completed, the mixture is allowed to stand for 20-30 minutes, and the heating temperature of the heating chamber (27) is controlled at 30-38 degrees Celsius.

9. The process for converting, treating and reusing food waste according to claim 6, characterized in that: In the S3, the biochemical reaction additive is a mixture of activated composite bacteria and microbial culture medium. By adding the additive, the pH value of the biochemical reaction under anaerobic conditions is adjusted to 5.5-7, and the biochemical reaction time under anaerobic conditions is 5-6 days.

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