A device for removing sand from kitchen waste

Abstract

The present application relates to the technical field of kitchen waste treatment, and provides a kitchen waste sand removal treatment device, including: a cyclone desander and a negative pressure device, the negative pressure device including a slurry pumping tube and a pumping and pressure device for forming negative pressure in the slurry pumping tube, the upper end of the slurry pumping tube is connected to the cyclone desander through a slurry pumping pipe, the lower end of the slurry pumping tube is connected to the cyclone desander through a slurry flushing pipe, a slurry pumping valve is provided on the slurry pumping tube, and a slurry flushing valve is provided on the slurry flushing pipe. By arranging a slurry pumping pipe and a slurry flushing pipe on the cyclone desander to connect the negative pressure device, when working, the pumping and pressure device will intermittently form a negative pressure in the slurry pumping tube, so that the slurry in the cyclone desander first enters the slurry pumping tube from the slurry pumping pipe, and then enters the cyclone desander from the slurry flushing pipe, so that the slurry has good fluidity and is stirred evenly, and it is easier to separate solids and liquids, so that heavy materials are precipitated at the bottom of the cyclone desander, and the device structure is simplified and reduced in quantity, thereby reducing the number of failure points of the device and reducing costs.

Description

Technical Field

[0001] The present application belongs to the technical field of restaurant waste treatment, and more specifically, relates to a restaurant waste sand removal treatment device. Background Art

[0002] In addition to incineration, the traditional treatment process for food waste generally uses anaerobic fermentation process for treatment. However, due to poor pretreatment effect, the food waste obtained by anaerobic fermentation process often carries a lot of heavy substances into the anaerobic reactor. This leads to a series of hazards in the back-end biogas production process. Therefore, how to select an efficient and low-cost sand removal pretreatment technology and process has become a key link in the anaerobic treatment of food waste.

[0003] The current food waste separation device generally has a screw machine installed on one side of the tank body, and uses the lifting function of the screw machine to achieve sand removal. For example, a Chinese patent (application number 2015101731672) discloses a food waste homogenization and impurity removal device, in which the feeding, sand removal, slag removal and slurry discharge all adopt a screw machine structure, which has many and complex structures and high costs, so there are many failure points and subsequent maintenance is troublesome. Summary of the invention

[0004] The purpose of the embodiments of the present application is to provide a food waste sand removal device to solve the technical problems of complex structure and high cost of food waste treatment equipment in the prior art.

[0005] To achieve the above-mentioned purpose, the technical solution adopted in the present application is: to provide a food waste sand removal and processing device, including: a cyclone sand remover and a negative pressure device, the negative pressure device includes a slurry suction cylinder and a suction and pressure device for forming a negative pressure in the slurry suction cylinder, the upper end of the slurry suction cylinder is connected to the cyclone sand remover through a slurry suction pipe, the lower end of the slurry suction cylinder is connected to the cyclone sand remover through a slurry flushing pipe, the slurry suction pipe is provided with a slurry suction valve, and the slurry flushing pipe is provided with a slurry flushing valve.

[0006] In one embodiment, the suction and pressure device includes a piston movably arranged in the slurry suction pipe and a driving member for driving the piston to move.

[0007] In one embodiment, the driving member is a pneumatic cylinder or a hydraulic cylinder.

[0008] In one embodiment, a feed pipe and a slurry discharge pipe are provided at the upper end of the cyclone desander, a sand discharge pipe is provided at the bottom of the cyclone desander, a feed valve is provided on the feed pipe, a slurry discharge valve is provided on the slurry discharge pipe, and a sand discharge valve is provided on the sand discharge pipe.

[0009] In one embodiment, an emergency sand discharge pipe is provided at the lower end of the cyclone desander, and an emergency sand discharge valve is provided on the emergency sand discharge pipe.

[0010] In one embodiment, the height of the feed pipe is higher than the height of the slurry suction pipe.

[0011] In one embodiment, the slurry discharge pipe is located between the feed pipe and the emergency sand discharge pipe.

[0012] In one embodiment, at least the slurry extraction valve and the slurry flushing valve are both electric valves.

[0013] In one embodiment, at least two negative pressure devices are provided around the cyclone desander.

[0014] The beneficial effect of the food waste desanding treatment device provided by the present application is that, compared with the prior art, by arranging a slurry suction pipe and a slurry flushing pipe connected to a negative pressure device on the cyclone desander, when working, the suction and pressure device will intermittently form a negative pressure in the slurry suction cylinder, so that the slurry in the cyclone desander first enters the slurry suction cylinder from the slurry suction pipe, and then enters the cyclone desander from the slurry flushing pipe, so that the slurry has good fluidity and is stirred evenly, and it is easier to separate the solid and liquid, so that the heavy matter is precipitated at the bottom of the cyclone desander. The structure of the device is simplified and the structure is small, thereby reducing the number of failure points of the device, reducing costs and facilitating maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0016] Figure 1 A schematic diagram of the structure of a suction and pressure device in a food waste sand removal device provided in an embodiment of the present application discharging slurry in a suction and pressure cylinder;

[0017] Figure 2 A schematic structural diagram of a suction and pressure device in a food waste sand removal device provided in an embodiment of the present application that forms a negative pressure in a suction and pressure cylinder so that slurry flows into the suction and pressure cylinder.

[0018] Among them, the reference numerals in the figure are:

[0019] 1. Cyclone desander; 11. Feed pipe; 12. Slurry discharge pipe; 13. Sand discharge pipe; 14. Feed valve; 15. Slurry discharge valve; 16. Sand discharge valve; 17. Emergency sand discharge pipe; 18. Emergency sand discharge valve; 2. Negative pressure device; 21. Slurry extraction cylinder; 22. Pumping and pressure device; 221. Piston; 222. Driving member; 23. Slurry extraction pipe; 24. Slurry flushing pipe; 25. Slurry extraction valve; 26. Slurry flushing valve. DETAILED DESCRIPTION

[0020] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0021] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0022] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0023] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0024] like Figure 1 and Figure 2 As shown, a food waste desanding treatment device provided by an embodiment of the present application is now described. The food waste desanding treatment device comprises: a cyclone desanding device 1 and a negative pressure device 2. The cyclone desanding device 1 is a main body for realizing desanding, solid-liquid separation, etc. of food waste; the negative pressure device 2 comprises a slurry pumping cylinder 21 and a pumping and pressing device 22 for forming a negative pressure in the slurry pumping cylinder 21. The pumping and pressing device 22 is a piston-type reciprocating motion device, which can form a negative pressure on the slurry pumping cylinder 21 and push out the material in the slurry pumping cylinder 21. The upper end of the slurry pumping cylinder 21 is connected to the cyclone desanding device 1 through a slurry pumping pipe 23, and the lower end of the slurry pumping cylinder 21 is connected to the cyclone desanding device 1 through a slurry flushing pipe 24. The slurry pumping pipe 23 is provided with a slurry pumping valve 25 for controlling the passage of the slurry pumping pipe 23, and the slurry flushing pipe 24 is provided with a slurry flushing valve 26 for controlling the passage of the slurry flushing pipe 24.

[0025] During operation, firstly, food waste is introduced into the cyclone desander 1 and the liquid level of the food waste is higher than the height of the slurry suction pipe 23; at this time, the slurry suction valve 25 and the slurry flushing valve 26 are in a closed state, and the suction and pressure device 22 forms a negative pressure in the slurry suction tube 21; the slurry suction valve 25 is opened, and the slurry in the cyclone desander 1 enters the slurry suction tube 21 through the slurry suction pipe 23. After the slurry suction tube 21 is filled with slurry, the slurry suction valve 25 is closed, and then the slurry suction valve 25 is opened, and the suction and pressure device 22 presses the slurry suction tube 21. The slurry in 21 is pushed out through the slurry flushing pipe 24 and enters the cyclone desander 1, and the slurry in the cyclone desander 1 is disturbed and stirred; after the slurry in the slurry suction tube 21 is completely discharged, the slurry suction valve 25 is closed, and then a negative pressure is formed in the slurry suction tube 21, and then the slurry suction valve 25 is opened, and the above steps are repeated, and the slurry flushing pipe 24 intermittently stirs the cyclone desander 1, so that the purpose of fully stirring the slurry can be achieved, thereby making the solid-liquid separation more complete.

[0026] Therefore, compared with the prior art, the food waste desanding treatment device provided in the embodiment of the present application connects the negative pressure device 2 to the cyclone desanding device 1 through the slurry suction pipe 23 and the slurry flushing pipe 24. When working, the suction and pressure device 22 will intermittently form a negative pressure in the slurry suction tube 21, so that the slurry in the cyclone desanding device 1 first enters the slurry suction tube 21 from the slurry suction pipe 23, and then enters the cyclone desanding device 1 from the slurry flushing pipe 24, so that the slurry has good fluidity and is evenly stirred, which makes it easier to separate the solid and the liquid, so that the heavy matter is precipitated at the bottom of the cyclone desanding device 1. The structure of the device is simplified and the structure is minimized, thereby reducing the number of failure points of the device, reducing costs and facilitating maintenance.

[0027] In this embodiment, the pumping and pressing device 22 includes a piston 221 movably arranged in the slurry extraction pipe 23 and a driving member 222 for driving the piston 221 to move. When the driving member 222 drives the piston 221 to move downward (close to one end of the slurry flushing pipe 24), the piston 221 discharges the slurry in the slurry extraction cylinder 21 into the cyclone desander 1. When the driving member 222 drives the piston 221 to move upward (close to one end of the slurry extraction pipe 23), negative pressure is formed in the slurry extraction cylinder 21. Specifically, in this embodiment, the driving member 222 is a cylinder or a hydraulic cylinder.

[0028] In this embodiment, a feed pipe 11 and a slurry discharge pipe 12 are provided at the upper end of the cyclone desander 1, a sand discharge pipe 13 is provided at the bottom of the cyclone desander 1, a feed valve 14 is provided on the feed pipe 11, a slurry discharge valve 15 is provided on the slurry discharge pipe 12, and a sand discharge valve 16 is provided on the sand discharge pipe 13. The feed pipe 11 and the feed valve 14 are used to control the entry of food waste into the cyclone desander 1, the slurry discharge pipe 12 and the slurry discharge valve 15 are used to control the discharge of the slurry separated in the cyclone desander 1, and the sand discharge pipe 13 and the sand discharge valve 16 are used to control the discharge of the sand-fixing heavy objects separated in the cyclone desander 1. After the cyclone desander 1 performs solid-liquid separation on the food waste, the slurry is at the upper end and the sand-fixing heavy objects are at the lower end.

[0029] In this embodiment, an emergency sand discharge pipe 17 is provided at the lower end of the cyclone desander 1, and an emergency sand discharge valve 18 is provided on the emergency sand discharge pipe 17. When the sand deposited in the cyclone desander 1 is too high or cannot be discharged through the sand discharge pipe 13, the sand can be discharged through the emergency sand discharge pipe 17 and the emergency sand discharge valve 18.

[0030] In this embodiment, the height of the feed pipe 11 is higher than the height of the slurry suction pipe 23. This ensures that the feed pipe 11 can have a liquid level higher than the slurry suction pipe 23 when the kitchen waste is normally introduced into the cyclone desander 1, so that the slurry suction pipe 23 can smoothly pump the slurry into the slurry suction tube 21 during negative pressure suction.

[0031] In this embodiment, the slurry discharge pipe 12 is located between the feed pipe 11 and the emergency sand discharge pipe 17, so that the separated slurry can be discharged without bringing out the sand.

[0032] In this embodiment, at least the slurry extraction valve 25 and the slurry flushing valve 26 are both electric valves, which are electrically connected to the driving member 222 and are controlled by a control system such as a PLC system, so that the negative pressure device 2 can intermittently stir the slurry in the cyclone desander 1. Of course, the feed valve 14, the slurry discharge valve 15, the sand discharge valve 16 and the emergency sand discharge valve 1816 can also be set as electric valves.

[0033] In this embodiment, at least two negative pressure devices 2 are arranged around the cyclone desander 1 , so that the number of negative pressure devices 2 can be increased to improve the agitation of the slurry in the cyclone desander 1 .

[0034] In this embodiment, the food waste sand removal device can separate the solid and liquid in the food waste, and has a good sand removal effect; the device can be arranged after the crushing treatment link of the food waste treatment, and can achieve a good solid-liquid separation effect.

[0035] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A kitchen waste sand removal device, characterized in that: include: A cyclone desander (1) and a negative pressure device (2), wherein the negative pressure device (2) comprises a slurry suction cylinder (21) and a suction and pressure device (22) for forming a negative pressure in the slurry suction cylinder (21), the upper end of the slurry suction cylinder (21) is connected to the cyclone desander (1) through a slurry suction pipe (23), the lower end of the slurry suction cylinder (21) is connected to the cyclone desander (1) through a slurry flushing pipe (24), the slurry suction pipe (23) is provided with a slurry suction valve (25), and the slurry flushing pipe (24) is provided with a slurry flushing valve (26); the suction and pressure device (22) comprises a movable A piston (221) is arranged in the slurry extraction pipe (23) and a driving member (222) for driving the piston (221) to move; a feed pipe (11) and a slurry discharge pipe (12) are arranged at the upper end of the cyclone desander (1); a sand discharge pipe (13) is arranged at the bottom of the cyclone desander (1); a feed valve (14) is arranged on the feed pipe (11); a slurry discharge valve (15) is arranged on the slurry discharge pipe (12); and a sand discharge valve (16) is arranged on the sand discharge pipe (13); the height of the feed pipe (11) is higher than the height of the slurry extraction pipe (23).

2. The kitchen waste sand removal device according to claim 1, characterized in that: The driving member (222) is a cylinder or a hydraulic cylinder.

3. The kitchen waste sand removal device according to claim 1, characterized in that: An emergency sand discharge pipe (17) is provided at the lower end of the cyclone desander (1), and an emergency sand discharge valve (18) is provided on the emergency sand discharge pipe (17).

4. The kitchen waste sand removal device according to claim 3, characterized in that: The slurry discharge pipe (12) is located between the feed pipe (11) and the emergency sand discharge pipe (17).

5. The kitchen waste sand removal device according to claim 4, characterized in that: At least the slurry extraction valve (25) and the slurry flushing valve (26) are both electric valves.

6. The kitchen waste sand removal device according to any one of claims 1 to 5, characterized in that: At least two negative pressure devices (2) are arranged around the cyclone desander (1).

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