A method for separating and purifying water surface oil at a wharf

Abstract

This invention discloses a method for oil-water separation and purification on the surface of a wharf. The method involves using a floating container on the surface of water containing floating oil. The oil-containing surface water is drawn into the container through an inlet below the waterline, where the floating oil is filtered and separated. The separated water is then pumped out from the bottom of the container and discharged. The separated floating oil is collected and treated separately. This invention can be directly applied to the surface of water contaminated with floating oil, efficiently cleaning oil slicks. It also boasts advantages such as simple implementation, convenient operation, adaptability to water level changes, and high wastewater treatment efficiency.

Description

Technical Field

[0001] This invention relates to the field of environmental protection technology for port and waterway water bodies, specifically to a method for oil-water separation and purification of wharf water surfaces. Background Technology

[0002] During ship berthing, maintenance, refueling, and loading / unloading operations, oily wastewater is easily generated in docks and nearshore waters. This type of wastewater usually contains floating oil, emulsified oil, and silt impurities. If discharged directly without treatment, it will not only form an oil film on the water surface, affecting dissolved oxygen levels, but also produce unpleasant odors and damage the ecological environment.

[0003] Current methods for treating oil spills at docks generally involve pumping oily wastewater to specialized treatment facilities. Examples include patents such as CN201910271866.9 (disclosed a dock ship oily wastewater receiving and treatment device and method), CN201611251173.6 (disclosed an automatic extraction device for oily wastewater collection on dock platforms), and CN202410205248.5 (disclosed a port dock oily wastewater treatment device). However, oil spills typically float on the surface of water at unpredictable locations, and the water level at docks fluctuates. Therefore, conventional pumping methods are insufficient to efficiently and reliably remove oil from the surface of specific water bodies, resulting in low treatment efficiency. Furthermore, existing oily wastewater treatment devices often employ oil-water separation membranes, air flotation, or complex electrical control systems, which are structurally complex, have high maintenance costs, and are prone to clogging or malfunction in outdoor environments such as docks.

[0004] Therefore, there is an urgent need for a method for treating oil spills on dock surfaces that is simple to implement, easy to operate, and more efficient in cleaning up oil spills. Summary of the Invention

[0005] In view of the shortcomings of the prior art, the technical problem to be solved by the present invention is: how to provide a simple, convenient, adaptable to water level changes, and efficient method for oil-water separation and purification on the surface of wharf water.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A method for separating and purifying oil and water on the surface of a wharf is characterized by using a floating container on the surface of a water area containing floating oil. The oil-containing surface water is drawn into the container through an inlet below its waterline, and the floating oil is filtered and separated inside the container. The separated water is then pumped out from the bottom of the container and discharged. The separated floating oil is collected and processed separately.

[0007] In this way, the method directly draws the oil floating on the surface of the water into a container for filtration, avoiding the trouble of remote pumping. It is simple to implement, easy to operate, and has higher sewage treatment efficiency. It can also better achieve automated treatment, saving labor and effort.

[0008] Furthermore, after the surface water is drawn into the container, solid-liquid separation is performed to remove solid impurities from the water.

[0009] This can better avoid the impact of floating objects on oil-water separation.

[0010] Furthermore, this method employs a water surface oil-water separation and purification device, which includes a separation shell that floats on the water surface during operation. A float is connected to the outside of the separation shell. An inlet located below the waterline of the device is provided on the upper surface of the separation shell. An outlet is provided outward at the lower end of the separation shell, and a drain pump is installed in the outlet. An oil-water separation filter assembly is inclined along the cross-section in the inner cavity of the separation shell, and a floating oil containment tank is connected to the lower end of the oil-water separation filter assembly.

[0011] When oil slick pollution is detected on the dock surface, this device is deployed into the oil-contaminated area. The device floats on the surface using a buoy, with the inlet located below the water surface to draw in surface water and oil. The water then falls under its own weight within the separation shell, passing through an oil-water separation filter assembly for separation. The separated oil flows obliquely along the surface of the filter assembly into an oil slick collection tank. The filtered water collects at the lower end of the separation shell's inner cavity and is discharged back into the water area via a drainage pump. This eliminates the need for periodic cleaning of the accumulated oil in the oil slick collection tank. Therefore, this device can be directly placed in contaminated water to achieve oil-water separation and purification, adapts to water level changes, and features a simple structure, convenient operation, high efficiency, reliability, and a high degree of automation.

[0012] Furthermore, the separation shell is cylindrical in shape, with the water inlet located in the middle of the upper surface. This cylindrical shell can better ensure the uniformity of water distribution within the inner cavity, and the smaller water inlet located in the middle of the upper surface can better ensure that the water in the inner cavity of the separation shell flows in a dripping state to achieve oil-water separation.

[0013] Furthermore, a threaded opening is provided at the center of the upper end of the separation shell, and a vertical water inlet cylinder is provided at the threaded opening by means of a threaded connection, with the upper end of the water inlet cylinder forming the water inlet.

[0014] This system uses an adjustable inlet cylinder to allow water to enter the water. By rotating the inlet cylinder, the distance between its upper end and the water surface can be adjusted, thereby regulating the amount of water entering the water. This avoids drawing in too much non-oily wastewater and allows for targeted adjustments based on the thickness of oil on the water surface to ensure effective oil intake.

[0015] Furthermore, a filter grid is also provided on the upper part of the inner cavity of the separation shell below the water inlet.

[0016] This facilitates the filtration of larger floating objects in the influent, preventing any impact on subsequent oil-water separation.

[0017] Furthermore, the filter grille has an upward-convex cone shape at the center, directly opposite the water inlet.

[0018] This way, after the water enters through the inlet, it flows outwards through the protrusion in the middle of the filter screen and drips downwards, improving the uniformity of water distribution below.

[0019] Furthermore, a circular plate-shaped upper cover is detachably installed on the upper end of the separation shell, and the water inlet is located in the middle of the upper cover.

[0020] This allows for easy removal of the top cover when needed, enabling better cleaning of floating debris from the filter. The removable installation can be achieved using either a threaded connection or a snap-fit ​​connection.

[0021] Furthermore, a water distribution plate is horizontally arranged below the filter grid in the inner cavity of the separation shell, and water distribution holes are evenly distributed on the water distribution plate.

[0022] This ensures a more uniform distribution of water as it flows downwards.

[0023] Furthermore, the oil-water separation filter assembly includes an inclined filter layer, the filter layer including a filter frame fixed to the inner wall of the separation housing, and a filter frame covered with a layer of oleophilic and hydrophobic material woven into the filter frame.

[0024] In this way, the wastewater containing oil is filtered as it passes through the filter screen, allowing the water to flow through and fall, while the oil is adsorbed onto the filter screen. When the oil accumulates to a thick layer, it flows into the oil collection tank under its own weight for collection. This method has the advantages of simple structure and reliable oil-water separation.

[0025] Furthermore, a row of inclined plates is arranged above the filter layer. The inclined plates are arranged in a direction perpendicular to the inclination of the filter layer. A layer of oleophilic and hydrophobic material is distributed on the inclined plates. A certain gap is left between the lower end of the inclined plates and the upper surface of the filter layer (for oil to flow down).

[0026] This method, relying on the inclined plate, greatly increases the distribution area of ​​the oleophilic and hydrophobic materials. When oil and water pass through the inclined plate, some of the oil components are first adsorbed and removed by the oleophilic and hydrophobic materials on the inclined plate before dripping onto the filter screen layer for filtration, thus improving the adsorption effect of oil. The oil accumulated on the inclined plate drips onto the filter screen layer and then flows down its slope into the floating oil collection tank for collection, thus further improving the removal effect of oil.

[0027] Furthermore, the inclined plates are arranged at intervals along the arrangement direction, so that each pair of adjacent inclined plates forms a V-shape. The upper ends of each pair of adjacent V-shaped inclined plates are connected and sealed. A water leakage gap is left between the lower ends of each pair of V-shaped inclined plates. The sum of the areas of the water leakage gaps between the lower ends of all V-shaped inclined plates is less than the area of ​​the inlet. The maximum water accumulation depth in the V-shaped inclined plates is greater than the water draft of the inlet (when the device is working).

[0028] In this way, after the water drips into the oil-water separator filter assembly, it enters the water accumulation space between the V-shaped inclined plates. Since the sum of the leakage gap areas between the lower ends of all the V-shaped inclined plates is less than the inlet area, the water that cannot drain out will linger and accumulate in the water accumulation space between the V-shaped inclined plates until the water depth exceeds the inlet's draft (when the device is working). At this point, the water pressure and flow velocity at the leakage gaps at the lower ends of the V-shapes increase, and the amount of water leaking out and the amount of water entering the device's inlet reach equilibrium. This creates a stable volume of water in the water accumulation space between the V-shaped inclined plates. Within this space, the water can better achieve oil-water separation by its own weight, and the oily parts can better float to the surface of the inclined plates. Therefore, this greatly improves the oil-water separation effect of the oil-water separator filter assembly.

[0029] Furthermore, the upper end of each inclined plate is fixed to an inclined plate mounting bracket, which is fixed to the inner wall of the separation housing. This makes it easier to install and fix the inclined plates.

[0030] Furthermore, multiple sets of the oil-water separation filter assembly and the corresponding floating oil containment tank are arranged at vertical intervals to further improve the separation effect.

[0031] Furthermore, the floating oil containment tank is detachably installed on the outer wall of the separation shell, and the oil-water separation filter assembly has an oil outlet on the upper surface of the lower end of the filter layer corresponding to the oil inlet on the separation shell, which is connected to the oil inlet on the floating oil containment tank.

[0032] This allows the oil spill containment tank to be detachably installed on the outer wall of the separation shell, facilitating disassembly and cleaning without interfering with the flow of water inside the device. Alternatively, the oil spill containment tank can be installed inside the separation shell, but this makes oil removal relatively more difficult.

[0033] Furthermore, the lower end of the separator has a funnel-shaped section with a cross-section that gradually narrows downwards, and the outlet is located at the lower end of the funnel-shaped section. This facilitates the collection of filtered water before it flows outwards.

[0034] Furthermore, the funnel section is also equipped with filter media. This allows the water to be further filtered and cleaned. Simultaneously, the filter media increases the depth of water collection at the outlet, facilitating smooth drainage by the pump.

[0035] Furthermore, the filter media includes an upper layer of quartz sand and a lower layer of activated carbon.

[0036] This quartz sand layer can intercept fine suspended solids in the water, improve the cleanliness of the effluent, and reduce the load on subsequent adsorption layers. The quartz sand layer is typically composed of quartz sand with varying particle sizes to create a multi-stage filtration effect. It also adsorbs residual oil and grease; the activated carbon layer further removes organic pollutants from the water, improving the quality of the effluent.

[0037] Furthermore, the float is a hollow float cylinder symmetrically connected and fixed to the left and right sides of the separation shell. This helps to maintain better balance and stability.

[0038] Furthermore, the float has an opening with a sealing cap at the top. This allows water to be added or removed from the float to adjust the buoyancy when needed.

[0039] Furthermore, a battery connected to the drain pump is also installed on the separate housing. This facilitates powering the drain pump to operate. Alternatively, in practice, the drain pump can be directly powered via a waterproof cable connected to the pontoon or dock.

[0040] In summary, this invention can be directly applied to the surface of water bodies contaminated with floating oil, and can efficiently clean up oil stains on the water surface. It also has the advantages of simple implementation, convenient operation, adaptability to water level changes, and high sewage treatment efficiency. Attached Figure Description

[0041] Figure 1 This is a schematic diagram of the water surface oil-water separation and purification device used in the implementation of this invention. Detailed Implementation

[0042] The present invention will now be described in further detail with reference to specific embodiments and accompanying drawings.

[0043] Optimal implementation method: A method for oil-water separation and purification on the surface of a wharf, characterized in that a floating container is used on the surface of the water containing floating oil. The oil-containing surface water is drawn into the container through an inlet below its waterline, and the floating oil is filtered and separated in the container. The separated water is then pumped out from the bottom of the container and discharged. The separated floating oil is collected and treated separately.

[0044] In this way, the method directly draws the oil floating on the surface of the water into a container for filtration, avoiding the trouble of remote pumping. It is simple to implement, easy to operate, and has higher sewage treatment efficiency. It can also better achieve automated treatment, saving labor and effort.

[0045] During implementation, surface water is drawn into the container and then subjected to solid-liquid separation to remove solid impurities from the water.

[0046] This can better avoid the impact of floating objects on oil-water separation.

[0047] More specifically, this invention employs a water surface oil-water separation and purification device, see [link to relevant documentation]. Figure 1 The device includes a separation shell 1 that floats on the water surface during operation. A float 2 is connected to the outside of the separation shell 1. A water inlet 3 located below the waterline of the device is provided on the upper surface of the separation shell 1. A water outlet 4 is provided outward at the lower end of the separation shell, and a drain pump 5 is installed in the water outlet. An oil-water separation filter assembly is inclined along the cross section in the inner cavity of the separation shell. A floating oil container 6 is connected to the lower end of the oil-water separation filter assembly.

[0048] When oil slick pollution is detected on the dock surface, this device is deployed into the oil-contaminated area. The device floats on the surface using a buoy, with the inlet located below the water surface to draw in surface water and oil. The water then falls under its own weight within the separation shell, passing through an oil-water separation filter assembly for separation. The separated oil flows obliquely along the surface of the filter assembly into an oil slick collection tank. The filtered water collects at the lower end of the separation shell's inner cavity and is discharged back into the water area via a drainage pump. This eliminates the need for periodic cleaning of the accumulated oil in the oil slick collection tank. Therefore, this device can be directly placed in contaminated water to achieve oil-water separation and purification, adapts to water level changes, and features a simple structure, convenient operation, high efficiency, reliability, and a high degree of automation.

[0049] The separation shell 1 is cylindrical in shape, with the water inlet 3 located in the middle of the upper surface. This cylindrical shell shape can better ensure the uniformity of water distribution in the inner cavity, and the smaller water inlet located in the middle of the upper surface can better ensure that the water in the inner cavity of the separation shell flows in a dripping state to achieve oil-water separation.

[0050] The separation shell 1 has a threaded opening at the center of its upper end, and a vertical water inlet cylinder 7 is provided at the threaded opening by means of a threaded connection. The upper end of the water inlet cylinder 7 forms the water inlet 3.

[0051] This system uses an adjustable inlet cylinder to allow water to enter the water. By rotating the inlet cylinder, the distance between its upper end and the water surface can be adjusted, thereby regulating the amount of water entering the water. This avoids drawing in too much non-oily wastewater and allows for targeted adjustments based on the thickness of oil on the water surface to ensure effective oil intake.

[0052] The upper part of the inner cavity of the separation shell, located below the water inlet, is also provided with a filter grid 8.

[0053] This facilitates the filtration of larger floating objects in the influent, preventing any impact on subsequent oil-water separation.

[0054] The filter grille 8 has a cone-shaped, upward-protruding section in the middle, directly opposite the water inlet.

[0055] This way, after the water enters through the inlet, it flows outwards through the protrusion in the middle of the filter screen and drips downwards, improving the uniformity of water distribution below.

[0056] The upper end of the separation shell is detachably fitted with a circular plate-shaped upper cover 9, and the water inlet 3 is located in the middle of the upper cover 9.

[0057] This allows for easy removal of the top cover when needed, enabling better cleaning of floating debris from the filter. The removable installation can be achieved using either a threaded connection or a snap-fit ​​connection.

[0058] In the separation shell cavity, a water distribution plate 10 is horizontally arranged below the filter grid, and water distribution holes are evenly distributed on the water distribution plate.

[0059] This ensures a more uniform distribution of water as it flows downwards.

[0060] The oil-water separation filter assembly includes an inclined filter layer 11, which includes a filter frame fixed to the inner wall of the separation housing, and a filter screen woven from an oleophilic and hydrophobic material is laid on the filter frame.

[0061] In this way, the wastewater containing oil is filtered as it passes through the filter screen, allowing the water to flow through and fall, while the oil is adsorbed onto the filter screen. When the oil accumulates to a thick layer, it flows into the oil collection tank under its own weight for collection. This method has the advantages of simple structure and reliable oil-water separation.

[0062] The filter layer 11 has a row of inclined plates 12 arranged above it. The inclined plates 12 are arranged in a direction perpendicular to the inclined direction of the filter layer. A layer of oleophilic and hydrophobic material is distributed on the inclined plates. A certain gap is left between the lower end of the inclined plates and the upper surface of the filter layer (for oil to flow down).

[0063] This method, relying on the inclined plate, greatly increases the distribution area of ​​the oleophilic and hydrophobic materials. When oil and water pass through the inclined plate, some of the oil components are first adsorbed and removed by the oleophilic and hydrophobic materials on the inclined plate before dripping onto the filter screen layer for filtration, thus improving the adsorption effect of oil. The oil accumulated on the inclined plate drips onto the filter screen layer and then flows down its slope into the floating oil collection tank for collection, thus further improving the removal effect of oil.

[0064] The inclined plates 12 are arranged at intervals along the arrangement direction, so that each pair of adjacent inclined plates 12 forms a V-shape. The upper ends of each pair of adjacent V-shaped inclined plates are connected and sealed. A water leakage gap is left between the lower ends of each pair of V-shaped inclined plates. The sum of the areas of the water leakage gaps between the lower ends of all V-shaped inclined plates is less than the area of ​​the water inlet. The maximum water accumulation depth in the V-shaped inclined plates is greater than the water draft of the water inlet (when the device is working).

[0065] In this way, after the water drips into the oil-water separator filter assembly, it enters the water accumulation space between the V-shaped inclined plates. Since the sum of the leakage gap areas between the lower ends of all the V-shaped inclined plates is less than the inlet area, the water that cannot drain out will linger and accumulate in the water accumulation space between the V-shaped inclined plates until the water depth exceeds the inlet's draft (when the device is working). At this point, the water pressure and flow velocity at the leakage gaps at the lower ends of the V-shapes increase, and the amount of water leaking out and the amount of water entering the device's inlet reach equilibrium. This creates a stable volume of water in the water accumulation space between the V-shaped inclined plates. Within this space, the water can better achieve oil-water separation by its own weight, and the oily parts can better float to the surface of the inclined plates. Therefore, this greatly improves the oil-water separation effect of the oil-water separator filter assembly.

[0066] Each inclined plate 12 has its upper end fixed to an inclined plate mounting bracket 13, which is fixed to the inner wall of the separation housing 1. This makes it easier to install and fix the inclined plates.

[0067] The oil-water separation filter assembly and the corresponding floating oil containment tank 6 are arranged in multiple sets at vertical intervals to improve the separation effect.

[0068] In addition, a vibration device can be installed at the upper end of the oil-water separation filter assembly. When needed, the vibration will allow the floating oil attached to it to flow more quickly downwards into the floating oil container.

[0069] The floating oil containment tank 6 is detachably installed on the outer wall of the separation shell 1. The oil-water separation filter assembly has an oil outlet on the upper surface of the lower end of the filter layer corresponding to the oil inlet on the separation shell, which is connected to the oil outlet on the floating oil containment tank.

[0070] This allows the oil spill containment tank to be detachably installed on the outer wall of the separation shell, facilitating disassembly and cleaning without interfering with the flow of water inside the device. Alternatively, the oil spill containment tank can be installed inside the separation shell, but this makes oil removal more difficult. In practice, mounting lugs can be installed on the oil spill containment tank, allowing for a detachable connection to the separation shell via removable bolts.

[0071] The lower end of the separator 1 has a funnel-shaped portion 14 with a cross-section that gradually narrows downwards, and the outlet 4 is located at the lower end of the funnel-shaped portion 14. This makes it easier for the filtered water to collect and flow outwards.

[0072] The funnel section is also equipped with filter media. This allows the water to be further filtered and cleaned. Simultaneously, the filter media increases the depth of water collection at the outlet, facilitating smooth drainage by the pump.

[0073] The filter media includes a quartz sand layer 15 on top and an activated carbon layer 16 on the bottom.

[0074] This quartz sand layer can intercept fine suspended solids in the water, improve the cleanliness of the effluent, and reduce the load on subsequent adsorption layers. The quartz sand layer is typically composed of quartz sand with varying particle sizes to create a multi-stage filtration effect. It also adsorbs residual oil and grease; the activated carbon layer further removes organic pollutants from the water, improving the quality of the effluent.

[0075] The float 2 is a hollow float cylinder symmetrically connected and fixed to the left and right sides of the separation shell. This helps to maintain better balance and stability.

[0076] The float 2 has an opening with a sealing cap at its upper end (not shown in the figure). This allows water to be added or removed into the float to adjust the buoyancy when needed.

[0077] The separate housing also houses a battery (not shown in the figure) connected to the drainage pump. This facilitates powering the drainage pump for operation. Alternatively, in practice, the drainage pump can be powered directly by connecting it to the pontoon or dock via a waterproof cable.

Claims

1. A method for separating and purifying oil and water on the surface of a wharf, characterized in that, On the surface of water containing oil slicks, a floating container is used. The oily surface water is drawn into the container through an inlet below its waterline, and the oil slick is filtered and separated inside the container. The separated water is then pumped out from the bottom of the container and discharged. The separated oil slicks are collected and treated separately.

2. The method for oil-water separation and purification on the surface of a wharf as described in claim 1, characterized in that, After the surface water is drawn into the container, solid-liquid separation is performed to remove solid impurities from the water.

3. The oil-water separation and purification method for wharf water surface as described in claim 1, characterized in that, This method employs a water surface oil-water separation and purification device, which includes a separation shell that floats on the water surface during operation. A float is connected to the outside of the separation shell. An inlet located below the waterline of the device is provided on the upper surface of the separation shell. An outlet is provided at the lower end of the separation shell, and a drain pump is installed in the outlet. An oil-water separation filter assembly is inclined along the cross-section in the inner cavity of the separation shell. A floating oil containment tank is connected to the lower end of the oil-water separation filter assembly.

4. The oil-water separation and purification method for wharf water surface as described in claim 3, characterized in that, The separation shell is cylindrical in shape, with the water inlet located in the middle of the upper surface. A threaded opening is provided at the center of the upper end of the separation shell, and a vertical water inlet cylinder is provided at the threaded opening by threaded connection, with the upper end of the water inlet cylinder forming the water inlet.

5. The oil-water separation and purification method for wharf water surface as described in claim 4, characterized in that, The upper part of the inner cavity of the separation shell, located below the water inlet, is also provided with a filter grid; The filter grille has an upward-protruding cone shape at the center, directly opposite the water inlet. A circular plate-shaped upper cover is detachably installed on the upper end of the separation shell, and the water inlet is located in the middle of the upper cover.

6. The oil-water separation and purification method for wharf water surface as described in claim 4, characterized in that, A water distribution plate is horizontally arranged below the filter grid in the inner cavity of the separation shell, and water distribution holes are evenly distributed on the water distribution plate.

7. The oil-water separation and purification method for wharf water surface as described in claim 3, characterized in that, The oil-water separation filter assembly includes an inclined filter layer, which includes a filter frame fixed to the inner wall of the separation housing, and a filter frame woven from an oleophilic and hydrophobic material is laid on the filter frame.

8. The oil-water separation and purification method for wharf water surface as described in claim 7, characterized in that, A row of inclined plates is arranged above the filter layer. The inclined plates are arranged in a direction perpendicular to the inclined direction of the filter layer. A layer of oleophilic and hydrophobic material is distributed on the inclined plates. A certain distance is left between the lower end of the inclined plates and the upper surface of the filter layer.

9. The oil-water separation and purification method for wharf water surface as described in claim 8, characterized in that, The inclined plates are arranged at intervals along the arrangement direction, so that each pair of adjacent inclined plates forms a V-shape. The upper ends of each pair of adjacent V-shaped inclined plates are connected and sealed. A water leakage gap is left between the lower ends of each pair of V-shaped inclined plates. The sum of the areas of the water leakage gaps between the lower ends of all V-shaped inclined plates is less than the area of ​​the inlet. The maximum water accumulation depth in the V-shaped inclined plates is greater than the water draft of the inlet. The upper end of each inclined plate is fixed to an inclined plate mounting bracket, which is fixed to the inner wall of the separation shell. The oil-water separation filter assembly and the corresponding floating oil containment tank are arranged in multiple sets at intervals along the top and bottom.

10. The oil-water separation and purification method for wharf water surface as described in claim 3, characterized in that, The floating oil containment tank is detachably installed on the outer wall of the separation shell. The oil-water separation filter assembly has an oil outlet on the upper surface of the lower end of the filter layer corresponding to the oil inlet on the separation shell, which is connected to the oil outlet on the floating oil containment tank. The lower end of the separation shell has a funnel-shaped section with a cross-section that gradually narrows downwards, and the outlet is provided at the lower end of the funnel-shaped section; The funnel section is also equipped with filter packing; The filter media consists of an upper layer of quartz sand and a lower layer of activated carbon. The float is a hollow float cylinder and is symmetrically connected and fixed on the left and right sides of the separation shell; The float has an opening with a sealing cap at the top; The separate housing is also equipped with a storage battery and a drain pump.

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