WO2019114164A1

WO2019114164A1 - Kitchen waste recycling and vacuum drying system, and drying method therefor

Info

Publication number: WO2019114164A1
Application number: PCT/CN2018/083014
Authority: WO
Inventors: 庞露
Original assignee: 庞露
Priority date: 2017-12-15
Filing date: 2018-04-13
Publication date: 2019-06-20
Also published as: CN108007074A

Abstract

Provided are a kitchen waste recycling and vacuum drying system, and a drying method therefor. The system comprises a kitchen waste feeding device (10), a vacuum drying device (20) and an air pump (30). By extruding and pushing in a fixed quantity in a screw structure, and by configuring a vacuum environment in an independent sealing barrel (21), a boiling point is decreased effectively, thereby achieving a rapid drying effect. Thus the kitchen waste can be continuously dried into powder particles, such that the kitchen waste in the form of powder particles can be made into fodder or fertilizer, having the advantages of power saving, rapid drying, high efficiency and environmental protection, etc.

Description

Kitchen waste recycling vacuum drying system and drying method thereof

Technical field

The invention relates to the technical field of garbage disposal, in particular to a kitchen waste recovery system using vacuum drying and a drying method thereof.

Background technique

After the recycling of the kitchen waste, in addition to a part of the food can be re-formed, another part can also be made into fertilizer, thereby achieving the purpose of recycling and environmental protection. In the process of converting food waste into feed or fertilizer, the kitchen waste will be dried before it can be reused. However, the existing kitchen waste drying method is to put the ground kitchen waste into a large motor-driven drum, the drum The wall of the cylinder is provided with a plurality of electric heating devices, and the heat in the cylinder is used to dry the kitchen waste in the cylinder.

However, such high temperature drying equipment and methods have the following disadvantages:

First, to accelerate the evaporation of water in the kitchen waste, to achieve drying, must be heated to a very high temperature, for example, from normal temperature 25 ° C to above 70 ° C, the total temperature is raised 45 ° C, so very power-hungry;

Second, the kitchen waste in the above drum is usually hundreds of kilograms, and it takes a lot of time to heat up to achieve drying, long drying time and low efficiency;

Third, the kitchen waste itself has the smell of sour rot, the speed and range of the volatilization and diffusion of the odor are faster and wider in the heating process, causing air pollution around the factory, and the dust of the kitchen waste will also cause environmental pollution to the environment. serious pollution.

Summary of the invention

The invention aims to solve the above-mentioned technical problems, and provides a kitchen waste recycling vacuum drying system with low power saving, fast drying, high efficiency and environmental protection, and provides a corresponding drying method.

The invention is achieved by the following technical solutions:

A kitchen waste recycling vacuum drying system comprises a kitchen waste feeding device, a vacuum drying device and an air pump, wherein the kitchen waste feeding device comprises a kitchen waste barrel, a screw feeding unit at the bottom of the kitchen waste barrel, and a setting In the discharge port on the kitchen waste barrel, the discharge port is provided with a distribution net and protrudes into the sealing barrel, the discharge port is sealed with the sealing barrel interface, and the screw feeding unit extends to the discharge port including the screw and the motor, and the screw One end is fixed, one end is driven by a motor, and the kitchen waste is quantitatively pushed out of the material port every revolution; the vacuum drying device comprises a separate sealing barrel, a plurality of collecting containers for holding the kitchen waste inside the sealing barrel, and an electric heating device; Connected to the sealed barrel through the suction pipe.

Preferably, a drainage net is arranged below the spiral feeding unit, and a water collecting pipe is arranged under the drainage net and connected to the water collecting container; the water collecting container is connected with an ozone deodorizing device.

Preferably, the outer peripheral surface of the sealing barrel is provided with an insulating layer, and an airtight door for the container to enter and exit is provided.

Preferably, the wall surface of the sealing barrel or the bottom of the collecting container is provided with an electric heating device; the electric heating device is a plurality of thin film heating sheets.

Preferably, the inner cavity of the sealed barrel is provided with an electric heating device; the electric heating device is an electric heating coil.

Preferably, the suction pipe is provided with a filtering device, and the filtering device is a replaceable filter paper.

Preferably, the air outlet of the air pump is provided with a deodorizing device.

Preferably, the controller further comprises a controller, a pressure control switch and a weight sensor; the controller is respectively connected to the air pump, the screw feeding unit and the electric heating device; the pressure control switch is arranged on the air suction pipe and connected to the controller; the weight sensor is arranged at The bottom of the barrel is sealed and received above the receiving container and connected to the controller.

Preferably, the electric heating device heats the temperature of the sealed barrel to reach 30~40 ° C, and the air pump maintains the air pressure of the sealed barrel to maintain the air pressure at 533 to 800 Pa, and the temperature is inversely proportional to the air pressure, and is intelligently controlled by the controller.

Preferably, the specific implementation method comprises the following steps: (a) kitchen waste pretreatment: before the kitchen waste is put into the kitchen waste bucket, the powder is firstly crushed until the particle size is maintained at mm. In the following, a certain amount of yeast is put into the shredded kitchen for a period of time, and then put into the kitchen waste bucket; (b) the pump is pumped: the pumping control information is generated by the controller, and the pump receives the pumping pump After the gas control information is started, the air in the sealed barrel is extracted, and the air pressure is maintained at 433~800Pa; (c) The heating device is heated: the heating control information is generated by the controller, and the electric heating device receives the information and starts to heat the sealed barrel cavity. And maintaining the temperature at 30~40 °C; (d) feeding of the kitchen waste feeding device: the feeding information is generated by the controller, and the screw feeding unit of the kitchen waste feeding device starts after receiving the feeding control information, and pushes the kitchen waste material A certain amount of food waste in the barrel reaches the discharge port and falls into the inner cavity of the sealed barrel; (e) vacuum drying: when the kitchen waste falls into the inner cavity of the sealed barrel, the water content therein instantaneously reaches the boiling point and vaporizes; (f) Residual powder collection: The certain amount of food waste is dried and then falls into a collection container in a sealed barrel.

The utility model has the beneficial effects that: compared with the prior art, a kitchen waste vacuum drying system of the invention is vacuumed by adding an air pump, so that the air pressure in the sealed barrel is maintained at 433 to 800 Pa, thereby lowering the boiling point of the water, and electrically heating only It needs to be heated to about 40 °C to realize the vaporization of the kitchen waste water. Compared with the prior art 70 °C, it greatly saves energy; the vacuum is pumped through the air pump, the air pressure is maintained at 433~800Pa, and the boiling point of water is only 4 °C. And by setting the screw feeding unit, the distribution network is arranged at the discharge port to realize the quantification and refinement of the kitchen waste. The surface area and the heating temperature far exceed the boiling point of the water, so that the kitchen waste entering the inner cavity of the sealed barrel is in the shortest time. The drying is carried out, the efficiency is high; and the heating temperature is only 40 ° C. During the drying process, the odor of the kitchen waste is small, and the drying device is completely enclosed and does not emit, which is more environmentally friendly than the prior art.

DRAWINGS

The specific embodiments of the present invention are further described in detail below with reference to the accompanying drawings, wherein:

Figure 1 is a front elevational view of the present invention;

2 is another embodiment of the electric heating device of the present invention;

Figure 3 is another embodiment of the collection container of the present invention;

Figure 4 is a schematic flow chart of the present invention.

Detailed ways

Referring to FIG. 1, a kitchen waste vacuum drying system includes a kitchen waste feeding device 10, a vacuum drying device 20, and an air pump 30. The kitchen waste feeding device 10 includes a kitchen waste drum 11 for holding a kitchen waste, a screw feeding unit 13 at the bottom of the kitchen waste drum 11, and a discharge port 12 disposed on the kitchen waste drum 11; The drum 11 can be a bucket with an open end; the discharge port 12 is provided with a distribution net 16 and extends into the sealing barrel 21, and the interface between the discharge port 12 and the sealing barrel 21 should be sealed to ensure the vacuuming effect of the air pump 30. The screw feeding unit 13 extends to the discharge port 12, and includes a screw 131 and a motor 132, and a drain net 50 is disposed under the drain net 50. The water collecting pipe 61 is disposed below the drain net 50 and communicates with the water collecting container 60, and the special spiral cavity of the screw 131 The structure will produce a twisting effect of the twisted towel when pushing the kitchen waste forward, and the kitchen waste will deposit excess water and oil juice under the pressure, and the water and oil juice then enter the water collecting pipe 61 through the drain net 50 to realize the kitchen waste. The preliminary separation reduces the energy required for drying the kitchen waste and the drying time. The water collecting container 60 is connected with the ozone deodorizing device 62 to reduce the odor of the precipitation component and avoid environmental pollution. The water collecting container 60 should be replaceable, preferably. In the form of sealable and set The alarm device has one end fixed at one end and one end of which is driven by the motor 132. Each rotation of the screw 131 can quantitatively push out the kitchen waste which has been initially precipitated into the discharge port 12, and the quantitative kitchen waste is subdivided into the material of the distribution net 16 into The small pieces of the kitchen waste pieces are dropped into the inner cavity of the sealed barrel 21 in batches to be quickly dried. The vacuum drying device 20 includes a single sealed tub 21, a plurality of collecting containers 24 for holding the kitchen waste inside the sealed tub, and an electric heating device 22; the airtight pump 30 is provided to evacuate the sealed tub 21 to maintain the air pressure. At 533~800Pa, the boiling point of water is only -1~4°C under this pressure. Therefore, the electric heating device 22 only needs to heat the inner cavity temperature of the sealed barrel 21 to 30~40°C, which is far beyond the boiling point of water. Evaporative vaporization is rapid and rapid, and the heating temperature is close to the normal temperature, which effectively reduces the energy consumption of heating kitchen waste and the energy loss caused by heat dissipation. The amount of residual kitchen moisture pushed by the screw feeding unit 13 at a normal temperature can be quickly heated to the inner cavity temperature, and the moisture of the kitchen waste is rapidly vaporized, thereby finally forming a dry kitchen waste particle storage; in a preferred form, the sealed barrel 21 It should have a certain rigidity, and the wall of the barrel should be able to withstand the pressure of 62kg/cm2 to adapt to the vacuum environment. The overall structure can be a drum, a square barrel or a cavity having a closed wall surface. The outer peripheral surface of the sealing barrel 21 can be provided with The thermal insulation layer or directly uses the thermal insulation material as the wall surface to reduce the energy loss caused by the high temperature, and is provided with an airtight door 23 for easy replacement of the collection container 24 for collecting dry kitchen waste particles. . The air pump 30 is a vacuum pump that sucks air, and communicates with the sealed barrel 21 through the air exhaust pipe 40; the water evaporated by the kitchen waste is quickly pumped away to maintain the air pressure in the sealed barrel (21) at 533 to 800 P, and the boiling point of the water is lowered. The effect of rapid drying and energy saving is achieved; the suction pipe 41 is provided with a filtering device 41, which is a replaceable filter paper to prevent impurities from entering the air pump 30. The air outlet of the air pump 30 is provided with a deodorizing device, and specifically, activated carbon can be used for filtering and deodorizing, and is regularly replaced.

Referring to FIGS. 1 and 3, the wall of the sealing barrel 21 or the bottom of the collecting container 24 is provided with an electric heating device 22; the electric heating device 22 is a plurality of thin film heating sheets. Referring again to FIG. 1 and FIG. 2, the inner surface of the sealing barrel 21 is provided with an electric heating device 22; the electric heating device 22 is an electric heating coil, and the coil should be away from the direction of the falling of the kitchen when being placed; The air pump 30 pumps the sealed barrel 21 to maintain a gas pressure of 533 to 800 Pa. At this pressure, the boiling point of the water is only -1 to 4 ° C. Therefore, the electric heating device 22 only needs to heat the inner temperature of the sealed barrel 21 to 30~. The corresponding drying effect can be achieved at 40 °C.

Referring to FIG. 1, a preferred embodiment of the present invention further includes a controller 70, a pressure control switch 80, and a weight sensor 25; the controller 70 is connected to the air pump 30, the motor 132 of the screw feed unit 13, and the electric heating device 22, respectively. For controlling and controlling the start-up, operation rate and stop of each device, and intelligently adjusting the relationship between temperature and air pressure, maximizing efficiency, achieving continuous falling and rapid drying of the kitchen waste; the pressure control switch 80 is disposed on the air suction pipe 40 And connected with the controller 70, when the kitchen water evaporates, the corresponding signal is transmitted to the controller 70 when the pressure is insufficient, and then the feedback is sent to the air pump 30 to increase the power and maintain the air pressure in the sealed barrel 21, thereby maintaining the boiling point of the water in the - 1~4 ° C; the weight sensor 25 is disposed above the bottom of the sealing barrel 21 to receive the collecting container 24, and is connected with the controller 70. When the dry particles of the kitchen reach a certain weight in the collecting container, the message is transmitted to the controller 70. Notify to remove and replace the collection container.

Referring to FIG. 4, a drying method of a kitchen waste vacuum drying system includes the following steps:

a. Pre-treatment of kitchen waste: Before the kitchen waste is put into the kitchen waste bucket 11, it is firstly crushed until the particle size is kept below 3mm ³ , and a certain amount of yeast is put into the shredded kitchen for a period of time, and then put into the kitchen. The kitchen waste tank 11; b, the air pump 30 is pumped: the pump 70 generates the pumping control information, and the air pump 30 receives the pumping control information and starts to extract the air in the sealed barrel 21 to maintain the air pressure at 533. ~800Pa; c, heating device 22 heating: the controller 70 generates heating control information, the electric heating device 22 receives the information and starts, heats the inner cavity of the sealed barrel 21 and maintains the temperature at 30~40 ° C; d, the kitchen waste feeding device 10 feeding: The feeding information is generated by the controller 70, and the screw feeding unit 13 of the kitchen waste feeding device 10 starts after receiving the feeding control information, and pushes a certain amount of kitchen waste in the kitchen waste barrel 11 to the discharging port. 12 and fall into the inner cavity of the sealing barrel 21; e, vacuum drying: when the kitchen waste falls into the inner cavity of the sealing barrel 21, the water content therein instantaneously reaches the boiling point and vaporizes; f, the kitchen waste powder collection: the certain amount of food waste After drying, it falls into the collection container 24 in the sealed tub 21 in the form of powder.

The above embodiments are only intended to illustrate the technical solutions of the present invention, and are not intended to be limiting, and any modifications or equivalents may be made without departing from the spirit and scope of the invention.

Claims

A kitchen waste recycling vacuum drying system comprises a kitchen waste feeding device (10), a vacuum drying device (20) and an air pump (30), characterized in that the kitchen waste feeding device (10) comprises a kitchen waste material a barrel (11), a screw feeding unit (13) disposed at the bottom of the kitchen waste barrel (11), and a discharge port (12) disposed on the kitchen waste barrel (11), the discharge port (12) A distribution net (16) is disposed and extends into the sealing barrel (21), the discharge port (12) is sealed at the interface with the sealing barrel (21), and the screw feeding unit (13) extends to the discharge opening (12) The utility model comprises a screw (131) and a motor (132). The screw (131) is fixed at one end, and one end is driven by the motor (132), and the cooking waste is quantitatively pushed out of the discharge port (12) every one rotation; the vacuum drying device (20) comprises a separate sealing barrel (21), a plurality of collecting containers (24) for holding a kitchen waste inside the sealing barrel (21), and an electric heating device (22); the air pump (30) is passed through an air suction tube (40) Connected to the sealed barrel (21).
The kitchen waste vacuum drying system according to claim 1, wherein a draining net (50) is disposed under the screw feeding unit (13), and a water collecting pipe (61) is disposed under the draining net (50) and connected A water collecting container (60); the water collecting container (60) is connected to an ozone deodorizing device (62).
The kitchen waste vacuum drying system according to claim 2, wherein the sealing barrel (21) is provided with an insulating layer on the outer peripheral surface thereof, and is provided with an airtight door for the collecting container (24) to enter and exit (23). ).
The kitchen waste vacuum drying system according to claim 3, wherein the sealing barrel (21) wall or the bottom of the collecting container (24) is provided with an electric heating device (22); the electric heating device (22) is a plurality of A film heating sheet.
The kitchen waste vacuum drying system according to claim 3, wherein the inner surface of the sealed barrel (21) is provided with an electric heating device (22); and the electric heating device (22) is an electric heating coil.
A kitchen waste vacuum drying system according to claim 2, wherein The suction pipe (40) is provided with a filtering device (41), which is a replaceable filter paper.
The kitchen waste vacuum drying system according to claim 2, wherein the air outlet of the air pump (30) is provided with a deodorizing device.
A kitchen waste vacuum drying system according to any one of claims 1-7, further comprising a controller (70), a pressure control switch (80), and a weight sensor (25); said controller ( 70) respectively connecting an air pump (30), a screw feeding unit (13), and an electric heating device (22); the pressure control switch (80) is disposed on the air suction pipe (40) and connected to the controller (70); The weight sensor (25) is disposed above the bottom of the sealed tub (21) to receive the collecting container (24) and is connected to the controller (70).
The kitchen waste vacuum drying system according to claim 8, wherein the electric heating device (22) heats the inner temperature of the sealed barrel (21) to 30 to 40 ° C, and the air pump (30) is sealed to the barrel. (21) The air pressure is maintained at 533 to 800 Pa.
A method of drying a kitchen waste vacuum drying system according to claim 8, comprising the steps of:

(a) Pre-treatment of food waste: Before the kitchen waste is put into the kitchen waste bin (11), it is firstly crushed until the particle size is kept below 3mm 3 , and a certain amount of yeast is put into the shredded kitchen for a period of time. , and then put into the kitchen waste barrel (11);

(b) Air pump (30) pumping: The pumping control information is generated by the controller (70), and the pump (30) receives the pumping control information and starts, and extracts the air in the sealed barrel (21) to maintain the air pressure. Maintained at 533~800Pa;

(c) heating device (22) heating: the controller (70) generates heating control information, the electric heating device (22) receives the information and then starts, heats the inner cavity of the sealed barrel (21) and maintains the temperature at 30 ~ 40 ° C;

(d) Food waste feeding device (10) Feeding: The feeding information is generated by the controller (70), and the screw feeding unit (13) of the kitchen waste feeding device (10) starts after receiving the feeding information, and pushes the kitchen a certain amount of kitchen waste in the remaining barrel (11) to the discharge port (12) and falls into the inner cavity of the sealing barrel (21);

(e) Vacuum drying: When the kitchen waste falls into the inner cavity of the sealed barrel (21), the water content therein instantaneously reaches the boiling point and vaporizes;

(f) Kitchen waste powder collection: The certain amount of the kitchen waste is dried and then falls into a collection container (24) in the sealed barrel (21).