A centralized treatment system for commercial kitchen food waste using siphon discharge

Abstract

The present invention discloses a centralized kitchen food waste treatment system utilizing siphon discharge, comprising: a plurality of food waste collection stations distributed at different food waste collection points in a commercial kitchen; at least one food waste negative pressure storage tank; at least one dehydration unit; wherein the food waste collection station comprises a food waste grinder connected to a feed port of the food waste collection station, through which food waste is ground; at least one water tank connected to a wastewater discharge port of the food waste grinder; a liquid level measuring device for measuring high and low liquid levels is provided in the water tank, the water outlet of the water tank is lower than the low liquid level, and is connected to the feed port of the food waste negative pressure storage tank via a first pipeline equipped with a valve. The present invention utilizes the siphon effect to perform centralized collection and treatment of garbage at various points, and does not require setting a pipeline slope, and has low construction difficulty.

Description

Technical Field

[0001] The invention relates to the field of centralized garbage treatment, and in particular to a centralized treatment system for commercial kitchen food waste using siphon discharge. Background Art

[0002] For large commercial kitchens, food waste is often generated in several places such as the food preparation room and the plate collection room. According to the principle of on-site disposal, several food waste grinding, crushing, dehydration and grease separation equipment are needed. On the one hand, the kitchen space does not allow this, and on the other hand, it is expensive, has a strong smell, breeds bacteria and is not hygienic enough.

[0003] In order to solve the above problems, the application publication number CN108687119A discloses a modular centralized dehydration and oil separation treatment system for commercial kitchens, which includes food waste collection stations (collection stations at least include food waste grinders and sewage pumps) distributed at different food waste generation points in commercial kitchens, temporary storage tanks for collecting sewage containing food waste, and connecting pipes between the two. As well as lifting pumps and dehydrators, oil-water separators, collection and treatment are separated, eliminating garbage transportation and the incidental hazards caused thereby.

[0004] However, this patent has the following defects:

[0005] First, after grinding, the kitchen waste water contains oil and residue, which places high requirements on the sewage pump;

[0006] Second, the pipeline is required to have a slope of 0.5%-1.5%. If the pipeline exceeds 100m, it is difficult to guarantee that the pipeline will drop 1m.

[0007] Third, there are also vacuum systems on the market for transporting wastewater, but the vacuum system's collection port valve will generate a lot of noise when it is opened; and vacuum collection generally uses a gas-liquid ratio of 5:1-25:1, which requires a lot of energy to draw a vacuum, and the vacuum pump needs to be started frequently, or the vacuum tank needs to be large, which is costly. Summary of the invention

[0008] In order to overcome the above-mentioned defects of the prior art, the purpose of the present invention is to provide a centralized treatment system for commercial kitchen food waste using siphon discharge. The present invention uses the principle of siphon discharge to transport the ground wastewater containing residues from each food waste collection point to the machine room for unified dehydration and oil separation.

[0009] In order to achieve the purpose of the present invention, the technical solution adopted is:

[0010] A centralized treatment system for commercial kitchen food waste using siphon discharge, comprising:

[0011] Several food waste collection stations distributed at different food waste collection points in commercial kitchens, where food waste is put into the food waste collection stations for collection;

[0012] At least one negative pressure food waste storage tank for storing wastewater containing food waste after pulverization and solid-liquid separation at the food waste collection station;

[0013] At least one dehydration unit for performing secondary solid-liquid separation on the food waste in the food waste negative pressure storage tank;

[0014] The kitchen waste collection station includes a kitchen waste grinder connected to a feed port of the kitchen waste collection station, and the kitchen waste is ground by the kitchen waste grinder;

[0015] At least one water tank connected to the wastewater discharge port of the kitchen waste grinder;

[0016] A liquid level measuring device for measuring high and low liquid levels is provided in the water tank, a water outlet of the water tank is lower than the low liquid level, and is connected to the feed port of the negative pressure storage tank for food waste through a first pipeline equipped with a valve;

[0017] The garbage collection station is arranged at the collection points of commercial kitchens on different floors, and the lowest collection point is not higher than the point where the negative pressure storage tank for food waste is located. The pressure of the negative pressure storage tank for food waste is between negative 0.5 and 0.8 atmospheres.

[0018] In a preferred embodiment of the present invention, a stirring device for homogenizing wastewater containing food waste is provided in the negative pressure storage tank for food waste, and the homogenized wastewater is discharged into the dehydration unit through a second pipe with a pump for secondary solid-liquid separation.

[0019] In a preferred embodiment of the present invention, the negative pressure storage tank for food waste is connected to a vacuum pump via a vacuum pipe, and a vacuum measuring device is provided inside the negative pressure storage tank for food waste, and the start and stop of the vacuum pump are controlled by the measurement result of the vacuum measuring device to maintain the pressure of the negative pressure storage tank for food waste between negative 0.5-0.8 atmospheres.

[0020] In a preferred embodiment of the present invention, the dehydration unit includes a wastewater feed port connected to the second pipeline; an oily wastewater outlet for discharging wastewater after secondary solid-liquid separation and a solid kitchen waste outlet for discharging solid waste, and is connected to the oil-water separator through the oily wastewater outlet;

[0021] Connected to the trash can through the solid food waste outlet.

[0022] In a preferred embodiment of the present invention, the first pipeline includes a PVC pipeline and pipe fittings connected together, the PVC pipeline has a pressure resistance of 10 kg, and is laid along the wall or ceiling of the commercial kitchen, fixed at intervals with brackets or hangers and provided with inspection holes at intervals.

[0023] In a preferred embodiment of the present invention, a second liquid level measuring device is provided in the negative pressure storage tank for food waste, for detecting the liquid level in the negative pressure storage tank for food waste.

[0024] The beneficial effects of the present invention are:

[0025] The siphon effect is used to collect and process garbage at various locations, and there is no need to set a pipeline slope, so the construction difficulty is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of the present invention.

[0027] Figure 2 It is a schematic diagram of the structure of the kitchen waste collection station in the present invention. DETAILED DESCRIPTION

[0028] The main principles of the present invention are:

[0029] By satisfying the siphon effect, including: ensuring that the top of the siphon is in a low pressure state, that is, not too much air can accumulate in the siphon, and it is best to keep the tube full. The height of the siphon top from the liquid level of the water inlet container cannot exceed the height of the water column that can be maintained by atmospheric pressure. The liquid level pressure at the water inlet must be higher than the liquid level pressure at the water outlet.

[0030] The wastewater containing food waste ground by the garbage grinding devices processed nearby is transported to a centralized treatment room for centralized dehydration and oil separation treatment, so as to make full use of the kitchen space, isolate the smell and bacteria of the food waste, increase the sanitation level of the kitchen, and reduce equipment investment and operating costs. The present invention can be modularly combined, can efficiently process food waste nearby, and can be far away from the kitchen operation area. The vacuum pump basically does not run, and relies on the atmospheric pressure difference to transport wastewater, with very low energy consumption and less noise, and no slope is required for pipeline installation.

[0031] like Figure 1 The centralized food waste treatment system for commercial kitchens using siphon discharge shown in 2 includes a plurality of food waste collection stations 100 distributed at different food waste collection points in the commercial kitchen, and the food waste is put into the food waste collection stations 100 for collection.

[0032] Focus on combination Figure 2Each food waste collection station 100 includes a food waste grinder 110 and a water tank 120. The food waste grinder 110 has a wastewater discharge port 111 containing food waste. The ground wastewater containing food waste is discharged into the water tank 120 through the feed port 121 of the water tank 120. There is no 90° bend in the pipeline between the wastewater discharge port 111 and the feed port 121.

[0033] A liquid level measuring device 122 for measuring high and low liquid levels is provided in the water tank 120. The water outlet 124 of the water tank 120 is lower than the low liquid level point and is connected to the feed port 201 of the negative pressure storage tank 200 for food waste through a first pipe 300 equipped with a quick-opening valve 310. The food waste collection station 100 can be set in different places and floors of the commercial kitchen. However, the lowest floor must not be higher than the floor where the negative pressure storage tank 200 for food waste is located, so as to ensure the siphon effect.

[0034] The first pipeline 300 includes PVC pipes and pipe fittings connected together. The first pipeline 300 has a pressure resistance of 10 kg and is laid along the wall or ceiling of the commercial kitchen. It is fixed with brackets or hangers every 1.6 m, and an inspection hole is set for every 6 m PVC pipe.

[0035] The negative pressure storage tank 200 for food waste is used to store wastewater containing food waste after being crushed and solid-liquid separated by the food waste collection station 100;

[0036] The negative pressure storage tank 200 for food waste is provided with a stirring device 210 for homogenizing wastewater containing food waste, and the homogenized wastewater is discharged into the dehydration unit 600 through a second pipeline 500 with a sewage main pump 510 for secondary solid-liquid separation.

[0037] A second liquid level measuring device 230 is provided in the negative pressure storage tank 200 for detecting the liquid level in the negative pressure storage tank 200 for the food waste.

[0038] The negative pressure storage tank 200 for food waste is connected to the vacuum pump 400 via a vacuum pipe 410, and a vacuum measuring device 220 is provided inside the negative pressure storage tank 200 for food waste. The start and stop of the vacuum pump 400 is controlled by the measurement result of the vacuum measuring device 220 to keep the pressure of the negative pressure storage tank for food waste between negative 0.5-0.8 atmospheres.

[0039] The dehydration unit 600 includes a wastewater feed port 601 connected to the second pipeline 500; an oily wastewater outlet 602 for discharging wastewater after secondary solid-liquid separation, which is connected to an oil-water separator 610 through the oily wastewater outlet 602, and the separated oil and water are discharged separately through the oil-water separator 610. A solid kitchen waste outlet 603 for discharging solid waste is connected to a trash can 620 through the solid kitchen waste outlet 603, and the solid waste after secondary solid-liquid separation is discharged into the trash can 620.

[0040] Because of the above structure, the workflow of the present invention is:

[0041] After the staff of the commercial kitchen collects the food waste, they pour it into the food waste grinder 110 in the nearest food waste collection station 100. The food waste grinder 110 breaks the food waste into fine particles to form wastewater containing food waste. The wastewater containing food waste generated by each food waste grinder 1101a flows into the corresponding water tank 120. When the liquid level of the water tank 120 reaches the highest value, the quick-opening valve 310 opens, and the liquid in the water tank 120 is sent to the food waste negative pressure storage tank 200 for temporary storage under the action of the pressure difference. When the liquid level in the water tank 120 drops to the lowest level, the quick-opening valve 310 is quickly closed.

[0042] The wastewater containing the food waste entering the negative pressure food waste storage tank 200 is homogenized under the stirring of the stirring device 210 .

[0043] When the wastewater containing food waste in the negative pressure storage tank 200 reaches a certain liquid level, the second liquid level measuring device 230 on the negative pressure storage tank 200 sends a signal to the external control device to start and stop the sewage main pump 510, and can appropriately close some or even all food waste collection stations 100. The sewage main pump 510 sends the wastewater containing food waste in the negative pressure storage tank 200 to the dehydration unit 600 for dehydration, and the dehydrated oil and water enter the oil-water separator 610 for oil-water separation, and the dehydrated fixed food waste is sent to the garbage can 620 to be collected for further recycling.

[0044] Ideally, the system is a closed system with no air entering. However, pipeline leakage may cause the pressure in the negative pressure storage tank 200 for food waste to rise. When the vacuum measuring device 220 detects that the system pressure is less than the set value, the vacuum pump 400 is started until the pressure in the tank reaches the set value and then stops.

Claims

1. A centralized treatment system for commercial kitchen food waste using siphon discharge, characterized in that: include: Several food waste collection stations distributed at different food waste collection points in commercial kitchens, where food waste is put into the food waste collection stations for collection; At least one negative pressure food waste storage tank for storing wastewater containing food waste after pulverization and solid-liquid separation at the food waste collection station; At least one dehydration unit for performing secondary solid-liquid separation on the food waste in the food waste negative pressure storage tank; The kitchen waste collection station includes a kitchen waste grinder connected to a feed port of the kitchen waste collection station, and the kitchen waste is ground by the kitchen waste grinder; At least one water tank connected to the wastewater discharge port of the kitchen waste grinder; A liquid level measuring device for measuring high and low liquid levels is provided in the water tank, a water outlet of the water tank is lower than the low liquid level, and is connected to the feed port of the negative pressure storage tank for food waste through a first pipeline equipped with a valve; The garbage collection station is set at the collection points of commercial kitchens on different floors, and the lowest collection point is not higher than the point where the negative pressure storage tank for kitchen waste is located. The pressure of the negative pressure storage tank for kitchen waste is between negative 0.5-0.8 atmospheres; The negative pressure storage tank for food waste is connected to a vacuum pump through a vacuum pipe, and a vacuum measuring device is provided inside the negative pressure storage tank for food waste, and the start and stop of the vacuum pump are controlled by the measurement result of the vacuum measuring device to maintain the pressure of the negative pressure storage tank for food waste between negative 0.5 and 0.8 atmospheres; A second liquid level measuring device is provided in the negative pressure storage tank for kitchen waste, and is used to detect the liquid level in the negative pressure storage tank for kitchen waste; When the wastewater containing food waste in the negative pressure storage tank for food waste reaches a certain liquid level, the second liquid level measuring device on the negative pressure storage tank for food waste gives a signal to the external control device to start and stop the sewage master pump, and close part of the food waste collection stations or even all the food waste collection stations. The sewage master pump sends the wastewater containing food waste in the negative pressure storage tank for food waste to the dehydration unit for dehydration, and the oil and water after dehydration enter the oil-water separator for oil-water separation, and the fixed food waste after dehydration is sent to the garbage can for collection so as to be further recycled; Ideally, the system is a closed system with no air entering. However, pipe leakage may cause the pressure in the negative pressure storage tank for food waste to rise. When the vacuum measuring device detects that the system pressure is lower than the set value, the vacuum pump is started until the pressure in the tank reaches the set value and then stops.

2. A centralized treatment system for commercial kitchen food waste using siphon discharge as claimed in claim 1, characterized in that: The negative pressure storage tank for kitchen waste is provided with a stirring device for homogenizing wastewater containing kitchen waste, and the homogenized wastewater is discharged into the dehydration unit through a second pipeline with a pump for secondary solid-liquid separation.

3. A centralized treatment system for commercial kitchen food waste using siphon discharge as claimed in claim 2, characterized in that: The dehydration unit includes a wastewater feed port connected to the second pipeline; an oily wastewater outlet for discharging wastewater after secondary solid-liquid separation and a solid food waste outlet for discharging solid waste, and is connected to the oil-water separator through the oily wastewater outlet; and is connected to a garbage can through the solid food waste outlet.

4. A centralized treatment system for commercial kitchen food waste using siphon discharge as claimed in claim 1, characterized in that: The first pipeline is formed by connecting a PVC pipeline and pipe fittings. The PVC pipeline has a pressure resistance of 10 kg and is laid along the wall or ceiling of the commercial kitchen. It is fixed at intervals with brackets or hangers and has inspection holes at intervals.

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