Solid-liquid separation device with backwashing device

Abstract

The utility model relates to a solid-liquid separation device with a backwashing device, and belongs to the field of restaurant wastewater treatment equipment. A shell of the spiral pusher is fixed on the water collecting tank; one end of the spiral pusher is positioned in the water collecting tank, and the other end extends out of the water collecting tank; the feeding pipe is fixed above one end, positioned in the water collecting tank, of the spiral pusher and is communicated with the right end of the spiral pusher; the fine holes are formed in the bottom end of the shell of the spiral pusher; the water tank is arranged in the water tank; the slag outlet is formed in one end, extending out of the water collecting tank, of the spiral pusher; the water tank is arranged outside; the drain pipe is fixed at the lower end of the water collecting tank; and the cleaning device is used for washing the inner wall and the outer wall of the fine hole. The device can be used for flushing the fine holes, and the blockage of the fine holes is reduced or even avoided.

Description

Technical Field

[0001] The utility model belongs to the field of restaurant wastewater treatment equipment, and particularly relates to a solid-liquid separation device with a backwashing device. Background Art

[0002] Catering wastewater from commercial complexes, star-rated hotels, and corporate cafeterias must pass through an oil-water separator to separate the oil and water before it can be discharged into the municipal pipeline network. Catering wastewater contains fixed debris, such as leftover rice grains, vegetable leaves, and various animal bones. If this fixed debris enters the oil-water separator, it can clog the equipment pipes and cause complete equipment failure. Therefore, a deslagging device is required at the front end of the oil-water separator to ensure the effective separation of fixed debris.

[0003] Currently, the oil-water separation industry primarily uses spirals to automatically push solid debris from wastewater. However, our company has discovered several drawbacks in using these auger pushers: The auger blades don't contact the inner wall of the auger housing, leaving a 1-3mm gap that prevents them from effectively pushing out tiny solid debris. Furthermore, condensed grease can clog the small holes, preventing the wastewater from flowing through properly into the next stage. Utility Model Content

[0004] The utility model discloses a solid-liquid separation device with a backwashing device, which is used for flushing the pores when the pores are blocked.

[0005] The utility model provides a solid-liquid separation device with a backwash device, comprising:

[0006] water collection tank;

[0007] The screw conveyor has a housing fixed on the water collecting tank; one end of the screw conveyor is in the water collecting tank, and the other end extends out of the water collecting tank;

[0008] A feed pipe is fixed above one end of the screw conveyor in the water collecting tank and is connected to the right end of the screw conveyor;

[0009] Several fine holes are opened at the bottom of the screw conveyor shell; they are located in the water collecting tank;

[0010] The slag outlet is located at the end of the screw pusher extending out of the water collecting tank and is outside the water collecting tank;

[0011] The drain pipe is fixed at the lower end of the water collecting tank;

[0012] A cleaning device for flushing the inner and outer walls of pores.

[0013] Furthermore, the cleaning device comprises:

[0014] The main flushing pipe is fixed to the outer shell of the auger. The main shaft of the auger is hollow, and the corresponding end of the main flushing pipe extends into the main shaft. The main shaft can rotate relative to the main flushing pipe, and the main shaft and the main flushing pipe are kept sealed.

[0015] A plurality of first spray holes are provided on the main shaft and arranged along the axis of the main shaft and can be communicated with the main flushing pipe;

[0016] The folded pipe is fixed on the side wall of the main flushing pipe, communicates with the main flushing pipe, is located outside the screw pusher, and is located in the water collecting tank;

[0017] A plurality of second spray holes are provided on the folded tube and can be connected with the main flushing pipe, and the second spray holes face the fine hole;

[0018] A water pump used to pump water into the main flushing pipe.

[0019] The main flushing pipe flushes the inner wall of the outer shell of the screw pusher, and the folded pipe flushes the outer wall of the outer shell of the screw pusher. Flushing in two directions is beneficial to improving the cleaning effect of fine pores compared to unilateral cleaning.

[0020] Furthermore, the right end of the auger is lower and the left end is higher, the right end of the auger is in the water collecting tank, and the left end of the auger extends out of the water collecting tank.

[0021] With a tilted auger, solid residue in restaurant wastewater can move to the right under its own weight, in the opposite direction of the auger's spiral blades, thereby increasing the squeezing force and making it easier for the liquid in the solid residue to flow out. If the auger is placed horizontally, the squeezing force will be reduced accordingly, resulting in incomplete separation of liquid and solid residue, and it is also easy for water to leak out of the slag outlet.

[0022] Furthermore, the bottom of the water collecting tank is an inclined surface, a mud discharge pipe is fixedly installed at the lower end of the water collecting tank, a valve is fixedly installed on the mud discharge pipe, and the mud discharge pipe is located at the lowest point of the water collecting tank.

[0023] The sludge remaining in the liquid will accumulate on the lower surface of the water collecting tank during long-term use of the device. The inclined bottom surface is conducive to the accumulation of silt at the lowest point. If the bottom of the water collecting tank is set horizontally, the silt will be evenly spread on the bottom surface of the water collecting tank, which is not conducive to centralized collection.

[0024] Furthermore, the motor driving the screw pusher to rotate is located outside the water collecting tank.

[0025] It is convenient for maintenance and there is no need to add additional sealing structure to protect the motor, thus saving costs.

[0026] Furthermore, the folded tube is in an L-shape.

[0027] The invention is easy to manufacture and has a short length, and can basically meet the purpose of flushing the outer wall of the pores with water from the main flushing pipe through the folded pipe. Beneficial effects

[0028] The main flushing pipe and the folded pipe in the cleaning device are used to flush the inside and outside of the pores, thereby improving the cleaning ability of the pores.

[0029] The bottom of the water collection tank is set to an inclined surface to facilitate the collection of silt. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the overall structure of the device. DETAILED DESCRIPTION

[0031] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0032] See Figure 1 , a solid-liquid separation device with a backwash device, comprising:

[0033] Water collecting tank 1;

[0034] The screw pusher 2 belongs to the existing technology. The screw pusher 2 is composed of spiral blades welded on the shaft and a shell. The shell of the screw pusher 2 is fixedly connected to the water collecting tank 1.

[0035] The right end of the auger 2 is lower and the left end is higher. The motor that drives the auger 2 is located at its left end. The right end of the auger 2 is in the water collection tank 1, and the left end of the auger 2 extends out of the water collection tank 1. The auger 2 can push the catering wastewater from the right end to the left end. A slag outlet 4 is provided at the lower end of the left end shell of the auger 2. The slag outlet 4 is located outside the water collection tank 1. The solid residue discharged from the slag outlet 4 falls into the slag collection bucket 3 by gravity. The slag collection bucket 3 is located outside the water collection tank 1.

[0036] A feed pipe 5 is fixedly connected to the upper end of the right end shell of the screw pusher 2. The feed pipe 5 is communicated with the right end of the screw pusher 2. The feed pipe 5 extends out of the water collecting tank 1 and is connected and communicated with the catering wastewater conveying pipe of the catering venue. The catering wastewater of the catering venue can be input into the feed pipe 5 from the corresponding catering wastewater conveying pipe, and thus enter the right end of the screw pusher 2.

[0037] The spiral blades of the auger 2 rotate to transport the restaurant wastewater from the right end to the left end. The liquid in the restaurant wastewater is squeezed during the transportation process and discharged from several fine holes opened at the bottom of the auger 2 shell. The fine holes are located in the water collection tank 1. The diameter of the fine holes is 2-4mm. The liquid eventually leaks into the water collection tank 1 and is collected by the water collection tank 1. The solid residue is discharged from the water collection tank 1 through the residue outlet 4 and falls into the residue collection bucket 8 directly below the residue outlet 4. The residue collection bucket 8 is located outside the water collection tank 1, which is convenient for replacement when the residue collection bucket 8 is full.

[0038] A stainless steel brush is welded to the edge of the spiral blade of the spiral pusher 2 to fill the 1-3mm gap between the spiral blade and the outer shell. The brush abuts against the inner wall of the spiral pusher 2 to avoid the flow of small solid residues into the pores as much as possible. When the brush rotates with the axis of the spiral pusher 2, it has a certain cleaning effect on the pores, and can also effectively push the solid residues, thereby improving the anti-clogging ability of the pores.

[0039] The drain pipe 6 is fixedly mounted at the lower end of the water collecting tank 1 and can discharge the collected liquid from the water collecting tank 1. The liquid flowing out of the drain pipe 6 can flow naturally by gravity and flow to the oil-water separation tank.

[0040] The outer shell of the screw pusher 2 and the side wall of the water collecting tank 1 are both provided with an overflow port 7, which is connected to the oil-water separation tank through a pipeline. If the screw pusher 2 fails to operate, solid residues will quickly clog the pores. Catering wastewater will flow out of the water collecting tank 1 from the outer shell of the screw pusher 2 through the overflow port 7, and eventually flow into the oil-water separation tank through the pipeline connected to the overflow port 7, and will not flow to the outside to pollute the on-site environment. Moreover, the overflow port 7 can also serve as an inspection port for repairing the screw pusher 2. A filter is set at the overflow port 7. When the screw pusher 2 is in operation or when the screw pusher 2 fails, solid residues cannot enter the oil-water separation tank through the overflow port 7.

[0041] A mud discharge pipe 8 is fixedly installed at the bottom of the water collecting tank 1 , and a valve is fixedly installed on the mud discharge pipe 8 for discharging the silt accumulated at the bottom of the water collecting tank 1 .

[0042] The solid-liquid separation device also includes:

[0043] The main flushing pipe 10 is a circular pipe in this embodiment, whose axis coincides with the axis of the auger 2. The axis of the auger 2 is hereinafter referred to as the main axis. The main flushing pipe 10 is fixed to the right end of the housing of the auger 2. The end of the main flushing pipe 10 away from the auger 2 extends out of the water collection tank 1. This end of the main flushing pipe 3 is connected to a water pump, which pumps water into the main flushing pipe 10. In this embodiment, the water is sewage or tap water after oil-water separation. The main shaft is hollow and has a cavity inside. A plurality of first spray holes are formed on the surface of the main shaft, and each first spray hole is arranged sequentially along the axis of the main shaft. The right end of the main shaft serves as the main water inlet. The aforementioned main flushing pipe 10 extends into the main water inlet, and a rubber ring is used to maintain a seal between the main water inlet and the main flushing pipe 10. The rubber ring is mounted on the end of the main flushing pipe 10, and the outer ring of the rubber ring abuts the inner wall of the main shaft. The main shaft can rotate relative to the main flushing pipe 10, and the rotation of the main shaft does not affect the sealing between the two. A portion of the water pumped into the main flushing pipe 10 enters the cavity from the right end of the main shaft and is then sprayed out from the first spray holes. As the auger 2 operates, the main shaft rotates continuously. With each rotation of the main shaft, water sprayed from the first spray holes flushes the fine holes on the inner wall of the auger 2 housing. The flushed water flows out of the fine holes and re-enters the water collecting tank 1. The drain pipe 6 of the water collecting tank 1 flows to the oil-water separation tank.

[0044] The folded tube 11 is located in the water collecting tank 1 and outside the screw pusher 2. When viewed from the radial direction of the main shaft, the folded tube 11 is in an "L" shape. The folded tube 11 consists of a connecting section and a flushing section. The connecting section is fixedly connected and communicated with the side wall of the main flushing pipe 10, and the flushing section coincides with the axis of the main shaft. The folded tube 11 is blocked at one end away from the main flushing pipe 10. A plurality of second spray holes are provided on the flushing section, and each second spray hole is arranged in sequence along the axis of the connecting section. The second spray hole faces the fine hole, and another part of the water drawn into the main flushing pipe 10 is sprayed out from the second spray hole through the connecting section and the flushing section. The water sprayed from the second spray hole flushes the position of the fine hole on the outer wall of the screw pusher 2 shell, and the water sprayed from the second spray hole falls to the drain pipe 6 and finally flows to the oil-water separation chamber. At this point, the first spray hole and the second spray hole respectively achieve the purpose of flushing the inside and outside of the fine hole, ensuring that the fine hole will not be blocked by condensed grease.

[0045] The use of this device

[0046] The catering wastewater generated by the catering establishment flows under its own weight through the catering wastewater conveying pipe and the feed pipe 5 into the auger 2. The auger 2 rotates, conveying the catering wastewater from the right end to the left end of the auger 2. The catering wastewater is squeezed against each other during the conveying process, and the liquid in the catering wastewater is squeezed out. Under the action of its own weight, the liquid flows to the fine holes at the bottom of the auger 2 shell, leaks into the water collection tank 1 through the fine holes, and is then discharged to the oil-water separation device through the drain pipe 6.

[0047] The solid residue is transported to the slag outlet 4 by the screw pusher 2 and naturally falls into the slag collecting bucket 3 at the slag outlet 4.

[0048] The operator regularly turns on the water pump to flush the pores. The pump pumps water into the main flushing pipe 10. Some of the water in the main flushing pipe 10 flows through the main shaft cavity to the first spray hole. As the main shaft rotates, the first spray hole cleans the inner wall of the housing, flushing the pores from the inside. The remaining water flows directly through the folded pipe 11 and out of the second spray hole, cleaning the outer wall of the housing, flushing the pores from the outside.

[0049] Based on the above-mentioned ideal embodiment of the present invention, and in accordance with the above description, relevant personnel can make various changes and modifications without departing from the technical scope of the present invention. The technical scope of the present invention is not limited to the content of the specification, but must be determined according to the scope of the claims.

Claims

1. A solid-liquid separation device with a backwash device, characterized in that: include: Water collecting tank (1); A screw pusher (2), the outer shell of the screw pusher (2) is fixed on the water collecting tank (1); one end of the screw pusher (2) is in the water collecting tank (1), and the other end extends out of the water collecting tank (1); A feed pipe (5) is fixed above one end of the screw pusher (2) in the water collecting tank (1) and is connected to the right end of the screw pusher (2); A plurality of fine holes are provided at the bottom end of the outer shell of the screw pusher (2); and the holes are located in the water collecting tank (1); The slag outlet (4) is provided at one end of the screw pusher (2) extending out of the water collecting tank (1); and is located outside the water collecting tank (1); A liquid discharge pipe (6) is fixed to the lower end of the water collecting tank (1); A cleaning device for flushing the inner and outer walls of pores.

2. A solid-liquid separation device with a backwash device according to claim 1, characterized in that: The cleaning device comprises: The main flushing pipe (10) is fixed to the outer shell of the screw pusher (2); the main shaft of the screw pusher (2) is hollow, and the corresponding end of the main flushing pipe (10) extends into the main shaft; the main shaft can rotate relative to the main flushing pipe (10), and the main shaft and the main flushing pipe (10) are kept sealed; A plurality of first spray holes are provided on the main shaft and arranged along the axis of the main shaft and can be communicated with the main flushing pipe (10); The folded pipe (11) is fixed on the side wall of the main flushing pipe (10), communicates with the main flushing pipe (10), is located outside the screw pusher (2), and is located in the water collecting tank (1); A plurality of second spray holes are provided on the folded tube (11) and can be communicated with the main flushing tube (10), and the second spray holes face the fine hole; A water pump for pumping water into the main flushing pipe (10).

3. The solid-liquid separation device with a backwash device according to claim 2, characterized in that: The right end of the screw pusher (2) is lower and the left end is higher, the right end of the screw pusher (2) is in the water collecting tank (1), and the left end of the screw pusher (2) extends out of the water collecting tank (1).

4. The solid-liquid separation device with a backwash device according to claim 2, characterized in that: The bottom of the water collecting box (1) is an inclined surface. A mud discharge pipe (8) is fixedly installed at the lower end of the water collecting box (1). A valve (9) is fixedly installed on the mud discharge pipe (8). The mud discharge pipe (8) is located at the lowest point of the water collecting box (1).

5. The solid-liquid separation device with a backwash device according to claim 2, characterized in that: The motor for driving the screw pusher (2) to rotate is located outside the water collecting tank (1).

6. The solid-liquid separation device with a backwash device according to claim 2, characterized in that: The folded tube (11) is in an L-shape.

Images