Kitchen waste oil collection system for kitchen sewage pipeline of residential building and control method

Abstract

This invention relates to a system and control method for collecting and controlling waste cooking oil from kitchen sewage pipelines in residential buildings. The system includes an oil-water separation device comprising a direct discharge pipe and an oil-water separation tank. The direct discharge pipe connects the residential building's kitchen sewage pipeline to the municipal sewer network. A first electric gate valve is installed on the direct discharge pipe. The inlet of the oil-water separation tank is connected to the direct discharge pipe via a water inlet pipe, on which a second electric gate valve is installed. This invention, through the oil-water separation device, allows for two modes of discharge of kitchen sewage from residential buildings into the municipal sewer network: a direct discharge mode where the sewage is directly discharged into the municipal sewer network, and a mode where the sewage passes through the oil-water separation tank before being discharged into the municipal sewer network. This achieves the collection of waste cooking oil, reducing the pressure on the municipal sewer network and sewage treatment plant caused by this waste cooking oil, while also preventing resource waste.

Description

Technical Field

[0001] This invention relates to the field of waste oil collection technology in residential buildings, and particularly to a waste oil collection system and control method for kitchen sewage pipelines in residential buildings. Background Technology

[0002] The reason why oil-water separation is not required for domestic sewage is that it is generally believed that the amount of waste cooking oil in household sewage is too small to cause blockages in municipal pipe networks, similar to the problem caused by waste cooking oil in restaurant wastewater. However, current civil engineering standards regarding residential kitchen wastewater were based on the then-prevalent low-rise buildings (5-6 stories) and single-story houses in China. With China's economic and social development, high-rise buildings of 10+ stories have become common in Chinese cities, and 30-story high-rise residential buildings have become mainstream in second- and third-tier cities. The amount of waste cooking oil in the daily kitchen wastewater of a 20-story high-rise residential building is no less than, and may even exceed, that of a medium-sized restaurant with a 200-square-meter operating area. The content of waste cooking oil in kitchen wastewater in high-rise residential buildings increases significantly. In particular, with the rapid improvement of living standards in my country, the consumption of cooking oil has surged, resulting in a significant increase in the content of waste cooking oil in kitchen wastewater. This waste cooking oil is directly discharged into the municipal pipe network, causing congestion and increasing the workload and difficulty of downstream sewage treatment plants. It is also a waste of resources. Summary of the Invention

[0003] The purpose of this invention is to at least address one of the aforementioned technical deficiencies.

[0004] Therefore, one objective of this invention is to provide a system and control method for collecting and controlling kitchen waste oil from sewage pipelines in residential buildings, in order to solve the problems mentioned in the background art and overcome the shortcomings of the prior art.

[0005] To achieve the above objectives, one embodiment of the present invention provides a kitchen waste oil collection system for residential building kitchen sewage pipelines, including an oil-water separation device. The oil-water separation device includes a direct discharge pipe and an oil-water separation tank. The direct discharge pipe is connected between the residential building kitchen sewage pipeline and the municipal pipe network. A first electric gate valve is installed on the direct discharge pipe. The inlet of the oil-water separation tank is connected to the direct discharge pipe through an inlet pipe. A second electric gate valve is installed on the inlet pipe. The outlet of the oil-water separation tank is connected to the direct discharge pipe through a sewage pipe. A segmented water level sewage discharge component and a third electric gate valve are installed on the sewage pipe. A segmented liquid level detection component for detecting the liquid level of the sewage after filtering waste oil is installed inside the oil-water separation tank. The inlet pipe and the sewage pipe are located on both sides of the first electric gate valve.

[0006] Preferably, in any of the above embodiments, a partition is installed inside the oil-water separator to divide its interior into a separator and a wastewater storage tank. An oil-water separator pipe is installed on the partition to allow wastewater in the separator to be discharged into the wastewater storage tank. The separator is connected to a direct discharge pipe via an inlet pipe. The liquid level detection component is installed inside the wastewater storage tank, which is connected to a direct discharge pipe via a wastewater pipe.

[0007] Preferably, in any of the above embodiments, a filter screen is provided at the top of the separation box, and the water inlet pipe is connected to the filter screen so that the sewage in the water inlet pipe enters the separation box after being filtered by the filter screen.

[0008] Preferably, in any of the above embodiments, the segmented water level sewage discharge assembly includes at least two sewage pumps that are equally spaced and parallel along the centerline of the sewage pipe, each sewage pump being installed on a branch pipe, and the sewage pipe being connected to a sewage storage tank through the branch pipe.

[0009] Preferably, in any of the above embodiments, the segmented liquid level detection component includes at least three liquid level switches arranged at equal intervals along the height direction of the sewage storage tank.

[0010] Preferably, in any of the above schemes, the segmented liquid level detection component is located above the segmented water level sewage discharge component, and the number of liquid level switches in the segmented liquid level detection component is greater than the number of sewage pumps in the segmented water level sewage discharge component.

[0011] Preferably, in any of the above schemes, the bottom end of the oil separator is 20mm away from the bottom wall of the separator box.

[0012] Preferably, in any of the above embodiments, the kitchen waste oil collection system further includes a self-management system, which includes a control device and a UPS power supply. The control device is connected to the segmented liquid level detection component, the segmented water level sewage discharge component, the first electric valve, the second electric valve, and the third electric valve, respectively. The UPS power supply is connected to the control device and supplies power to the liquid level switch, the first electric valve, the second electric valve, and the third electric valve.

[0013] Preferably, the control device is wirelessly connected to the urban management Internet of Things system, as described in any of the above schemes.

[0014] Preferably, as described in any of the above schemes, the self-control system also includes a fault alarm device to alert staff that the sewage pump has malfunctioned.

[0015] Another embodiment of the present invention provides a control method for a kitchen waste oil collection system in a residential building, comprising the following steps:

[0016] Step 1: Open the second and third electric gate valves, and close the first electric gate valve. Sewage from the kitchen sewage pipeline of the residential building enters the filter screen box through the inlet pipe to filter food residue. The filtered sewage enters the separation box for oil-water separation.

[0017] Step 2: The separated wastewater is transported from the grease trap to the wastewater storage tank. When the wastewater level in the storage tank reaches the lowest level switch, the level switch sends a signal to the control device. The control device then starts the wastewater pump furthest from the direct discharge pipe to transport the wastewater in the storage tank through the wastewater pipe to the direct discharge pipe, and finally into the municipal pipe network.

[0018] Step 3: When the sewage pump furthest from the direct discharge pipe malfunctions, the sewage level in the sewage storage tank continues to rise until it reaches the second level switch, at which point a signal is sent to the control device. The control device then controls the second sewage pump furthest from the direct discharge pipe to start, and so on. At the same time, the control device sends a sewage pump malfunction information to alert the staff.

[0019] Step 4: When all the sewage pumps in the segmented water level sewage discharge assembly fail, the control device controls the second and third electric gate valves to close and the first electric gate valve to open. At this time, the sewage in the kitchen sewage pipeline of the residential building is directly discharged into the municipal pipe network through the direct discharge pipe.

[0020] The kitchen waste oil collection system for residential buildings is any one of the aforementioned kitchen waste oil collection systems for residential buildings.

[0021] Compared with the prior art, the advantages and beneficial effects of the present invention are as follows:

[0022] 1. By installing an oil-water separation device, the discharge of kitchen wastewater from residential buildings into the municipal pipe network can be divided into two modes: one is direct discharge, in which kitchen wastewater from residential buildings is directly discharged into the municipal pipe network; the other is that the wastewater is discharged into the municipal pipe network after passing through an oil-water separation tank, thereby collecting waste oil. This reduces the pressure on the normal operation of the municipal pipe network and sewage treatment plant caused by this waste oil, and also avoids resource waste. The two working modes can be switched. When the waste oil collection fails, it can be switched to direct discharge to ensure that the pipeline can be unobstructed and will not affect the normal life of the residents in the building.

[0023] 2. When the automatic control system controls the opening and closing of the first electric gate valve, the second electric gate valve and the third electric gate valve, it realizes the automatic switching between the two working modes, with a high degree of automation and more convenient use;

[0024] 3. By installing a UPS power supply, when the residential building experiences a power outage, it can serve as a backup power source to supply power to the first, second, and third electric gate valves. The control device can control the second and third electric gate valves to close, and the first electric gate valve to open, restoring the direct discharge mode, ensuring that the normal use of the property by residents is not affected in the event of a power outage.

[0025] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0026] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0027] Figure 1 This is a schematic diagram of the overall structure of a kitchen waste oil collection system for residential buildings, provided according to an embodiment of the present invention.

[0028] The components include: 1. Oil-water separator; 2. Separator; 3. Sewage storage tank; 4. Baffle; 5. Oil separator pipe; 6. Straight discharge pipe; 7. First electric gate valve; 8. Filter screen box; 9. Inlet pipe; 10. Second electric gate valve; 11. Sewage pipe; 12. Sewage pump; 13. Diversion pipe; 14. Third electric gate valve; 15. Liquid level switch. Detailed Implementation

[0029] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0030] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0031] like Figure 1As shown in the figure, an embodiment of the present invention provides a kitchen waste oil collection system for residential buildings, including an oil-water separation device. The oil-water separation device includes a direct discharge pipe 6 and an oil-water separation tank 1. The direct discharge pipe 6 is connected between the kitchen waste oil pipeline 11 of the residential building and the municipal pipe network. A first electric gate valve 7 is installed on the direct discharge pipe 6. The inlet of the oil-water separation tank 1 is connected to the direct discharge pipe 6 through an inlet pipe 9. A second electric gate valve 10 is installed on the inlet pipe 9. The outlet of the oil-water separation tank 1 is connected to the direct discharge pipe 6 through a wastewater pipe 11. A segmented water level wastewater discharge component and a third electric gate valve 14 are installed on the wastewater pipe 11. A segmented liquid level detection component for detecting the liquid level of the wastewater after filtering waste oil is installed inside the oil-water separation tank 1. The inlet pipe 9 and the wastewater pipe 11 are located on both sides of the first electric gate valve 7.

[0032] The oil-water separator 1 is equipped with a partition 4 to divide its interior into a separator 2 and a wastewater storage tank 3. An oil-water separator pipe 5 is installed on the partition 4 to allow wastewater in the separator 2 to be discharged into the wastewater storage tank 3. The separator 2 is connected to a direct discharge pipe 6 through an inlet pipe 9. The wastewater storage tank 3 is equipped with the liquid level detection component and is connected to the direct discharge pipe 6 through a wastewater pipe 11.

[0033] Furthermore, connecting flanges are installed at both ends of the direct discharge pipe 6, which enable detachable connection with the kitchen sewage pipe 11 of the residential building and the municipal pipe network, allowing for disassembly and replacement, making it more convenient to use.

[0034] In this embodiment, the oil-water separation device is installed on the kitchen sewage pipe 11 before it merges with the toilet sewage pipe 11 in the basement section of the high-rise residential building. A second electric gate valve 10 is installed on the inlet pipe 9, a first electric gate valve 7 is installed on the direct discharge pipe 6, and a third electric gate valve 14 is installed on the sewage pipe 11. This allows for two working modes. The first working mode is direct discharge, where sewage from the kitchen sewage pipe 11 in the residential building is directly discharged into the municipal pipe network through the direct discharge pipe 6 without collecting waste oil from the sewage. The second working mode is waste oil collection mode, where the first electric gate valve 7 is closed, and the second electric gate valve 10 and the third electric gate valve 14 are open. The sewage undergoes oil-water separation in the separation tank 2, and the separated sewage enters the sewage storage tank 3 and is discharged into the direct discharge pipe 6 through the sewage pipe 11 by the segmented water level sewage discharge component, and then enters the municipal pipe network. This achieves the function of collecting waste oil from the sewage before it enters the municipal pipe network. When the oil-water separator malfunctions, it will switch directly to the direct discharge mode, which will not cause any inconvenience to the normal life of the residents in the building. After the malfunction is eliminated, it will return to the second working mode.

[0035] By separating waste oil from kitchen wastewater before discharging it into the municipal sewer network, the pressure on the municipal sewer network and wastewater treatment plant caused by this waste oil is reduced, while also avoiding resource waste.

[0036] A filter screen box 8 is installed at the top of the separation tank 2. The water inlet pipe 9 is connected to the filter screen box 8 so that the sewage in the water inlet pipe 9 enters the separation tank 2 after being filtered by the filter screen box 8. The sewage first passes through the filter screen box 8 before entering the separation tank 2, which can filter out the food residue mixed in the sewage.

[0037] Furthermore, the segmented sewage discharge assembly includes at least two sewage pumps 12 that are equally spaced and parallel along the centerline of the sewage pipe 11. Each sewage pump 12 is installed on a branch pipe 13, and the sewage pipe 11 is connected to the sewage storage tank 3 through the branch pipe 13. The centerline of the branch pipe 13 is perpendicular to the centerline of the sewage pipe 11, and the centerline of the sewage pump 12 is perpendicular to the centerline of the straight discharge pipe 6.

[0038] The segmented liquid level detection component includes at least three liquid level switches 15 arranged at equal intervals along the height direction of the sewage storage tank 3. When the liquid level reaches the position of the liquid level switch 15, the corresponding sewage pump 12 is turned on.

[0039] The segmented liquid level detection component is located above the segmented water level sewage discharge component, and the number of liquid level switches 15 in the segmented liquid level detection component is greater than the number of sewage pumps 12 in the segmented water level sewage discharge component.

[0040] When the sewage level in the sewage storage tank 3 reaches the highest position of the level switch 15, it indicates that the sewage pumps 12 in the segmented sewage discharge assembly are all in a faulty state.

[0041] In this embodiment, multiple sewage pumps 12 and level switches 15 are provided, which have multiple layers of protection to ensure the smooth discharge of sewage. When one sewage pump 12 fails to work, another sewage pump 12 can continue to work, resulting in good working effect.

[0042] The bottom end of the oil separator 5 is 20mm away from the bottom wall of the separation tank 2. The oil separator 5 can be a tee pipe, and the top end of the oil separator 5 is higher than the sewage liquid level in the separation tank 2 to prevent the upper layer of grease from entering the sewage storage tank 3 through the oil separator 5.

[0043] An end cap is provided at the top of the oil-water separator 1, corresponding to the part of the separator 2, to remove waste oil.

[0044] In another embodiment, the waste cooking oil collection system further includes a self-management system. This self-management system includes a control device and a UPS power supply. The control device is connected to a segmented liquid level detection component, a segmented wastewater discharge component, a first electric valve, a second electric valve, and a third electric valve. The UPS power supply is connected to the control device and supplies power to the liquid level switch 15, the first electric valve, the second electric valve, and the third electric valve. The control device is wirelessly connected to an urban management IoT system.

[0045] By installing a UPS power supply as a backup power source to supply power to the first electric gate valve 7, the second electric gate valve 10, and the third electric gate valve 14, in the event of a power outage in the residential building, the control device can control the second electric gate valve 10 and the third electric gate valve 14 to close, and the first electric gate valve 7 to open, restoring to the direct discharge mode. This ensures that the normal use of the property by residents is not affected during a power outage. At the same time, the control device remotely sends the power outage fault information to the urban management Internet of Things system. When power is restored, the control device controls the first electric gate valve 7 to close, and the second electric gate valve 10 and the third electric gate valve 14 to open, restoring to the working mode of switching waste oil in sewage.

[0046] The control device is located in the basement of the residential building. The control device includes a housing and a control chip. The control chip is installed inside the housing, and a display screen is installed on the housing. The display screen is connected to the control chip to display information. The control chip is connected to a UPS power supply, a segmented liquid level detection component, a segmented water level sewage discharge component, a first electric valve, a second electric valve, and a third electric valve. The control chip can be an MCU microcontroller, such as an STM32F103CBT6, but is not limited to this type.

[0047] In another embodiment, the self-management system also includes a fault alarm device to alert staff to a malfunction in the sewage pump. The fault alarm device includes a local alarm and a remote alarm. The local alarm uses an LED light mounted on the housing and connected to a control chip. When the sewage pump malfunctions, the LED lights up. The remote alarm uses the control chip to remotely send fault information to the urban management IoT system to remind staff to inspect and repair the sewage pump 12.

[0048] This invention also provides a control method for a kitchen waste oil collection system with 11 lines of sewage pipes in residential buildings, comprising the following steps:

[0049] Step 1: Open the second electric gate valve 10 and the third electric gate valve 14, and close the first electric gate valve 7. The sewage in the kitchen sewage pipe 11 of the residential building enters the filter screen box 8 through the inlet pipe 9 to filter food residue. The filtered sewage enters the separation box 2 for oil-water separation.

[0050] Step 2: The separated sewage is transported from the grease trap 5 to the sewage storage tank 3. When the sewage level in the sewage storage tank 3 reaches the lowest level switch 15, the level switch 15 sends a signal to the control device. The control device controls the sewage pump 12, which is furthest from the direct discharge pipe 6, to start, so as to transport the sewage in the sewage storage tank 3 through the sewage pipe 11 to the direct discharge pipe 6, and finally flow into the municipal pipe network.

[0051] Step 3: When the sewage pump 12, which is furthest from the direct discharge pipe 6, malfunctions, the sewage level in the sewage storage tank 3 continues to rise until it reaches the second level switch 15. At this point, a signal is sent to the control device, which then controls the second sewage pump 12, which is furthest from the direct discharge pipe 6, to start, and so on. At the same time, the control device sends a message about the malfunction of the sewage pump 12 to remind the staff.

[0052] Step 4: When all the sewage pumps 12 in the segmented water level sewage discharge assembly fail, the control device controls the second electric gate valve 10 and the third electric gate valve 14 to close and the first electric gate valve 7 to open. At this time, the sewage in the kitchen sewage pipe 11 of the residential building is directly discharged into the municipal pipe network through the direct discharge pipe 6.

[0053] The kitchen waste oil collection system of the residential building kitchen sewage pipe line 11 is any one of the above-mentioned kitchen waste oil collection systems of the residential building kitchen sewage pipe line 11.

[0054] The automatic switching between the first, second, and third electric gate valves enables automatic switching between two working modes: direct discharge and waste oil collection. This ensures both the smooth collection of waste oil and the normal daily life of residents in the building.

[0055] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0056] It will be readily understood by those skilled in the art that this invention includes any combination of the inventive description and specific embodiments outlined in the foregoing specification, as well as the various parts shown in the accompanying drawings. Due to space limitations and for the sake of brevity, not all of these combinations have been described in detail. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

[0057] Although embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention without departing from the principles and spirit of the invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A system for collecting kitchen waste oil from sewage pipelines in residential buildings, characterized in that, The device includes an oil-water separation unit, comprising a direct discharge pipe and an oil-water separation tank. The direct discharge pipe is connected between the kitchen sewage pipeline of a residential building and the municipal pipe network. A first electric gate valve is installed on the direct discharge pipe. The inlet of the oil-water separation tank is connected to the direct discharge pipe via an inlet pipe. A second electric gate valve is installed on the inlet pipe. The outlet of the oil-water separation tank is connected to the direct discharge pipe via a sewage pipe. A segmented water level sewage discharge component and a third electric gate valve are installed on the sewage pipe. A segmented liquid level detection component for detecting the liquid level of sewage after filtering waste oil is installed inside the oil-water separation tank. The inlet pipe and the sewage pipe are located on both sides of the first electric gate valve. The oil-water separator is equipped with a partition to divide its interior into a separator and a wastewater storage tank. An oil-water separating pipe is installed on the partition to allow wastewater in the separator to be discharged into the wastewater storage tank. The separator is connected to a direct discharge pipe through an inlet pipe. The wastewater storage tank is equipped with the liquid level detection component and is connected to a direct discharge pipe through a wastewater pipe. The top of the separation box is equipped with a filter screen box, and the water inlet pipe is connected to the filter screen box so that the sewage in the water inlet pipe enters the separation box after being filtered by the filter screen box. The kitchen waste oil collection system also includes a self-management system, which includes a control device and a UPS power supply. The control device is connected to the segmented liquid level detection component, the segmented water level sewage discharge component, the first electric valve, the second electric valve, and the third electric valve, respectively. The UPS power supply is connected to the control device and supplies power to the liquid level switch, the first electric valve, the second electric valve, and the third electric valve. The segmented liquid level detection component includes at least three liquid level switches arranged at equal intervals along the height direction of the sewage storage tank; The segmented liquid level detection component is located above the segmented water level sewage discharge component, and the number of liquid level switches in the segmented liquid level detection component is greater than the number of sewage pumps in the segmented water level sewage discharge component. When the sewage level in the sewage storage tank reaches the lowest level switch, the level switch sends a signal to the control device, which then controls the sewage pump furthest from the direct discharge pipe to start, so that the sewage in the sewage storage tank can be transported through the sewage pipe to the direct discharge pipe and finally flow into the municipal pipe network. When the sewage pump furthest from the direct discharge pipe malfunctions, the sewage level in the sewage storage tank continues to rise until it reaches the second level switch, at which point a signal is sent to the control device. The control device then controls the second sewage pump furthest from the direct discharge pipe to start, and so on.

2. The kitchen waste oil collection system for residential buildings as described in claim 1, characterized in that, The segmented water level sewage discharge assembly includes at least two sewage pumps that are equally spaced and parallel along the centerline of the sewage pipe. Each sewage pump is installed on a branch pipe, and the sewage pipe is connected to the sewage storage tank through the branch pipe.

3. The kitchen waste oil collection system for residential buildings as described in claim 1, characterized in that, The control device is wirelessly connected to the city management Internet of Things system.

4. The kitchen waste oil collection system for residential buildings as described in claim 3, characterized in that, The self-control system also includes a fault alarm device to alert staff that the sewage pump has malfunctioned.

5. A control method for a kitchen waste oil collection system in a residential building, characterized in that: Includes the following steps, Step 1: Open the second and third electric gate valves, and close the first electric gate valve. Sewage from the kitchen sewage pipeline of the residential building enters the filter screen box through the inlet pipe to filter food residue. The filtered sewage enters the separation box for oil-water separation. Step 2: The separated wastewater is transported from the grease trap to the wastewater storage tank. When the wastewater level in the storage tank reaches the lowest level switch, the level switch sends a signal to the control device. The control device then starts the wastewater pump furthest from the direct discharge pipe to transport the wastewater in the storage tank through the wastewater pipe to the direct discharge pipe, and finally into the municipal pipe network. Step 3: When the sewage pump furthest from the direct discharge pipe malfunctions, the sewage level in the sewage storage tank continues to rise until it reaches the second level switch, at which point a signal is sent to the control device. The control device then controls the second sewage pump furthest from the direct discharge pipe to start, and so on. At the same time, the control device sends a sewage pump malfunction information to alert the staff. Step 4: When all the sewage pumps in the segmented water level sewage discharge assembly fail, the control device controls the second and third electric gate valves to close and the first electric gate valve to open. At this time, the sewage in the kitchen sewage pipeline of the residential building is directly discharged into the municipal pipe network through the direct discharge pipe. The kitchen waste oil collection system for residential buildings is the same as the kitchen waste oil collection system for residential buildings as described in any one of claims 1-4.

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