Waste oil filtering device

Abstract

The utility model discloses a waste oil filtering device, which belongs to the field of waste oil recovery processing devices and comprises a filtering kettle body, an opening of the filtering kettle body faces upwards, a kettle cover movably covers the opening, a guide pipe penetrates through the kettle cover, and one end of the guide pipe can be inserted into the filtering kettle body. The conveying device is used for conveying purified waste oil filtered in the filtering kettle body to the outside of the filtering kettle body; a filter plate is arranged in the kettle body, the guide pipe can penetrate through the filter plate, the filter plate is arranged at the upper end of the end part of the guide pipe, and the guide pipe can drive the filter plate to vertically move in the filter kettle body and separate from the filter kettle body. The guide plate is connected with the filter plate, and the feed port of the guide pipe is arranged at the lower end of the filter plate, so that the aims of improving the filter efficiency and preventing the filter plate from being easily blocked are fulfilled.

Description

Technical Field

[0001] The utility model relates to the field of waste oil recovery and processing devices, and particularly relates to a waste oil filtering device. Background Art

[0002] Biodiesel refers to fatty acid methyl esters or ethyl esters formed by the esterification of vegetable oils (such as rapeseed oil, soybean oil, peanut oil, corn oil, cottonseed oil, etc.), animal oils (such as fish oil, lard, beef tallow, mutton tallow, etc.), waste oils or microbial oils with methanol or ethanol. Vegetable oils and animal fats with fatty acid glycerides (i.e., triglycerides) having a certain structural symbol are usually used as raw materials for biodiesel.

[0003] The process of processing and recycling waste oils to produce biodiesel is an environmental protection technology that converts waste into useful energy. Waste oils usually come from the catering service industry, food processing, household kitchen waste, etc., including kitchen waste known as "swill oil", gutter oil, and reused frying waste oil. After collection, preliminary processing such as heating, filtering to remove scum, and separating oil and water is required to obtain crude oil, and then it is prepared through transesterification reaction to convert the triglycerides in the waste oil into fatty acid methyl esters, which not only helps to reduce environmental pollution but also realizes the recycling of resources.

[0004] In the process of waste oil filtration, due to the variety of impurities, the viscosity of the waste oil is too high, which easily clogs the filtering device and makes the filtering efficiency of the filtering device low.

[0005] In view of this, this application is specifically proposed. Content of the Utility Model

[0006] The purpose of the utility model is to provide a waste oil filtering device, which connects a guide plate with a filtering plate and sets the feeding port of a conduit at the lower end of the filtering plate to solve the problems of low filtering efficiency and easy clogging of the filtering plate in the prior art.

[0007] The embodiment of the utility model realizes through the following technical solutions: The embodiment of the utility model provides a waste oil filtering device, which includes a filtering kettle body with an upward opening, and a kettle cover is movably covered on the opening. A conduit is penetrated through the kettle cover, and one end of the conduit can be inserted into the inside of the filtering kettle body for transporting the purified waste oil filtered inside the filtering kettle body to the outside of the filtering kettle body;

[0008] A filtering plate is arranged inside the kettle body, and the conduit can penetrate through the filtering plate. The filtering plate is arranged at the upper end of the end of the conduit, and the conduit can drive the filtering plate to move vertically inside the filtering kettle body and separate from the filtering kettle body.

[0009] Preferably, an inlet hood is provided at the inlet end of the waste oil for purifying the conduit. The inlet hood is in a horn shape, and its diameter gradually increases from top to bottom. A filter screen is provided at the free end of the inlet hood. The pore size on the filter plate is larger than the pore size on the filter screen.

[0010] Preferably, the filter screen protrudes downward from the inlet hood in a free state. When the conduit is connected to a mechanical pump for oil drainage operation, the filter screen can be concave upward inside the inlet hood.

[0011] Preferably, through holes are provided on the filter plate. The conduit passes through the through holes and can slide relative to the filter plate. The maximum radial diameter of the inlet hood is larger than the diameter of the through holes.

[0012] Preferably, the inlet hood is detachably connected to the conduit.

[0013] Preferably, the conduit is fixedly connected to the kettle cover, and a lifting ring is provided on the kettle cover.

[0014] Preferably, the upper part of the filtering kettle body above the filter plate is the upper kettle body, and the lower part of the filtering kettle body below the filter plate is the lower kettle body. The radial size of the inner cavity of the upper kettle body is adapted to the filter plate, and the radial size of the inner cavity of the lower kettle body gradually decreases downward.

[0015] Preferably, a discharge valve is provided at the bottom of the lower kettle body.

[0016] Preferably, a flexible rubber ring is provided at the outer edge of the filter plate.

[0017] Preferably, two support feet are symmetrically provided at the bottom of the filtering kettle body.

[0018] Compared with the prior art, the embodiment of the present utility model has the following advantages and beneficial effects:

[0019] 1. A waste oil filtering device provided by the embodiment of the present utility model arranges the filter plate in the filtering kettle body, and filters and precipitates and layers the waste oil in the filtering kettle body through the filter plate. Among them, the purified waste oil after filtration will flow into the lower part of the filter plate, and most of the impurities in the waste oil will be concentrated above the filter plate and cannot enter the lower part of the filter plate, so as to realize the filtration and layering of the waste oil. At the same time, the purified waste oil passing through the filter plate can be subjected to gravity precipitation inside the filtering kettle body; since the inlet of the conduit is inserted into the purified waste oil layer, when the conduit is connected to the corresponding mechanical pump pipeline system or device, the purified waste oil layer can be transported from the conduit to the outside of the filtering kettle body for collection to obtain the purified waste oil.

[0020] In the embodiment of the present utility model, the filter plate can move in the filter kettle body and can even be taken out for separate cleaning. Specifically, an external force vertically upward can be applied to the conduit to pull the conduit upward. Since the conduit is connected to the filter plate, the filter plate can be driven to move vertically upward until it moves to the opening of the filter kettle body or even moves out of the filter kettle body for slag removal and cleaning, and then is reinstalled in the filter kettle body for new filtration.

[0021] 2. An inlet hood is provided at the end of the conduit. The inlet hood is in a horn shape, and a filter screen is provided at the free end of the inlet hood. The pore size of the filter screen is smaller than the pore size of the filter plate. The setting of the filter screen can perform secondary filtration on the waste oil in the purified waste oil layer, avoid excessive waste residue from blocking the conduit, and improve the cleanliness of the entire discharged purified waste oil.

[0022] 3. The structure of the filter screen is convex downward from the inlet hood in the free state, and when the conduit is connected to a mechanical pump for oil discharge operation, the filter screen can be concave upward within the inlet hood. Specifically, the filter screen of this structure presents a convex or concave structure in different states, that is, the filter screen has relative flexibility, which can control the vibration of the filter screen to a certain extent and reduce the possibility of the filter screen being blocked.

[0023] 4. Through holes are provided on the filter plate. While the conduit passes through the through holes, relative sliding between the conduit and the through holes is allowed. Since the external dimension of the inlet hood is larger than the external dimension of the conduit, the inlet hood cannot pass through the through holes. When a vertically upward pulling force is applied to the conduit, during the pulling process, the inlet hood can restrict the downward movement of the filter plate, thereby realizing the driving of the filter plate. After the filter plate is removed from the filter kettle body, since the inlet hood and the conduit in the embodiment of the present utility model are movably connected, the inlet hood can be disassembled outside the filter kettle body. After disassembly, the filter plate and the conduit can be separated, improving the flexibility of the entire structure and facilitating the maintenance and replacement of specific components.

[0024] Generally speaking, a waste oil filtering device provided by the embodiment of the present utility model connects the guide plate to the filter plate and sets the feed inlet of the conduit at the lower end of the filter plate to improve the filtering efficiency and avoid the problem that the filter plate is easily blocked. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present utility model and should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0026] Figure 1Schematic structural diagram of the waste oil filtering device provided by the embodiment of the present utility model;

[0027] Figure 2 Schematic connection diagram of the conduit, filter plate and inlet cover provided by the embodiment of the present utility model;

[0028] Figure 3 Schematic structural diagram of the inlet cover provided by the embodiment of the present utility model.

[0029] Marks in the attached drawings and corresponding part names:

[0030] 1-kettle cover, 2-conduit, 3-filter plate, 4-inlet cover, 5-filter net, 6-through hole, 7-lifting ring, 8-upper kettle body, 9-lower kettle body, 10-discharge valve, 11-flexible rubber ring, 12-supporting foot, 13-thread, 14-precipitate, 15-purified waste oil, 16-impurity, 17-unpurified waste oil. Detailed implementation manners

[0031] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are some but not all of the embodiments of the present utility model. Usually, the components of the embodiments of the present utility model described and shown in the accompanying drawings here can be arranged and designed in various different configurations.

[0032] Therefore, the following detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the present utility model to be protected, but merely represents the selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the scope of protection of the present utility model.

[0033] It should be noted that: similar reference numerals and letters denote similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0034] In the description of the present utility model, it should be noted that the terms "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance. Embodiment

[0035] As Figure 1-2As shown in the figure, an embodiment of the present utility model provides a waste oil filtering device, which includes a filtering kettle body for containing waste oil and filtering and settling the waste oil. The opening of the filtering kettle body faces upward, facilitating the pouring of unpurified waste oil into the filtering kettle body. And a kettle cover 1 is movably covered on the opening to ensure the sealing of the filtering process. A conduit 2 is penetrated through the kettle cover 1. One end of the conduit 2 can be inserted into the interior of the filtering kettle body, that is, the conduit 2 is a channel connecting the interior and the exterior of the filtering kettle body. One end is inserted into the interior of the filtering kettle body for conveying the purified waste oil 15 filtered in the interior of the filtering kettle body to the exterior of the filtering kettle body. During the operation, the outside of the conduit 2 can be connected to the pipeline system and equipment related to the mechanical pump to convey the purified waste oil to the collection device outside the filtering kettle body for subsequent processing to prepare biodiesel.

[0036] A filter plate 3 is arranged in the filtering kettle body for filtering waste oil, isolating impurities 16 above the filter plate 3, and the purified waste oil will be concentrated below the filter plate 3 after passing through the filter plate 3. The conduit 2 can penetrate through the filter plate 3, and the filter plate 3 is arranged at the upper end of the end of the conduit 2. In this way, the conduit 2 can accurately convey the purified waste oil 15 below the filter plate 3 to the outside. Since the conduit 2 is connected to the filter plate 3, the conduit 2 can drive the filter plate 3 to move vertically inside the filtering kettle body and separate from the filtering kettle body. Specifically, after the filtering kettle body filters a certain amount of waste oil, the filter plate 3 can be cleaned first and then the filtering operation can be continued. More specifically, after filtering a certain amount of waste oil and outputting the purified waste oil 15, the operation can be paused, the connection between the conduit 2 and the external system can be disconnected, and then a vertically upward force is applied to the conduit 2. During the process of the conduit 2 moving vertically upward, it can drive the filter plate 3 to move vertically upward in the kettle body until it separates from the filtering kettle body. Then, the filter plate 3 can be cleaned outside the filtering kettle body and then installed into the filtering kettle body to continue the filtering operation. It should be noted that the force driving the movement of the conduit 2 can be a force directly applied manually or a force applied by external mechanical equipment, which is not limited here and can be specifically set according to the actual operation situation.

[0037] In order to further improve the filtering and purification degree of the purified waste oil 15 and prevent the conduit 2 from being blocked, an inlet cover 4 can be arranged at the inlet end of the purified waste oil 15 of the conduit 2, as Figure 3As shown, the inlet hood 4 is trumpet-shaped, and its diameter gradually increases from top to bottom, which can reduce the flow rate of the purified waste oil 15 when flowing in, reduce turbulence, and help the purified waste oil 15 enter the conduit 2 more smoothly. A filter screen 5 is provided at the free end of the inlet hood 4. The pore size of the filter holes on the filter plate 3 is larger than that of the filter screen 5. The filter screen 5 can further intercept the impurity 16 particles in the purified waste oil 15, protect the conduit 2 and extend its service life. Through two-stage filtration, that is, the filtration effects of the filter screen 5 of the inlet hood 4 and the filter plate 3, impurities 16 of different sizes in the waste oil can be removed more effectively, improving the purification efficiency. Further, the filter screen 5 protrudes downward from the inlet hood 4 in the free state. When the conduit 2 is connected to a mechanical pump for oil drainage operation, the filter screen 5 can be concave upward into the inlet hood 4. Specifically, in the absence of external force, the filter screen 5 naturally protrudes downward from the inlet hood 4 (as Figure 3 ), this structure helps to provide a larger filtration area when the purified waste oil 15 flows in, thereby improving the filtration efficiency. When the conduit 2 is connected to a mechanical pump for oil drainage operation, the suction or pressure generated by the pump will affect the shape of the filter screen 5. Under the action of the mechanical pump, the filter screen 5 may be concave upward into the inlet hood 4 (as Figure 2 ), and the whole operation process can be controlled, so as to realize the intermittent up and down shaking of the filter screen 5, reducing the possibility of the filter screen 5 being blocked.

[0038] To improve the flexibility of the whole device, as a preferred embodiment of the present utility model, the conduit 2 is movably connected to the filter plate 3. Of course, in other embodiments, the conduit 2 and the filter plate 3 can also be fixedly connected, which is not limited here. Returning to the embodiment of the present utility model, through holes 6 are provided on the filter plate 3, and the conduit 2 passes through the through holes 6, that is, the conduit 2 and the filter plate 3 are movably connected through the through holes 6, and the conduit 2 and the filter plate 3 can slide relative to each other. The maximum radial diameter of the inlet hood 4 is larger than the diameter of the through hole 6, which ensures that the inlet hood 4 cannot pass through the through hole 6, and the inlet hood 4 can limit the filter plate 3 to achieve the purpose of driving the filter plate 3 to move vertically by the conduit 2. Preferably, the outer diameter of the conduit 2 is adapted to the inner diameter of the through hole 6. More preferably, the inlet hood 4 and the conduit 2 are detachably connected. The detachable connection here can be connected by bonding, clamping, screw connection and other methods, which is not limited here, as long as the purpose of sufficient connection stability can be achieved. Exemplarily, in the embodiment of the present utility model, as Figure 2 and Figure 3 shown, the connection mode between the inlet hood 4 and the conduit 2 is screw 13 connection. This structure not only has high connection firmness but also is convenient for disassembly. By detachably connecting the inlet hood 4 and the conduit 2, the inlet hood 4, the conduit 2 and the filter plate 3 can be repaired or replaced separately, improving the flexibility of the whole device.

[0039] In order to facilitate driving the filter plate 3, in the embodiment of the utility model, the conduit 2 can be fixedly connected to the kettle cover 1, and a lifting ring 7 is provided on the kettle cover 1, so that it is necessary to use external lifting equipment to hang the lifting ring 7, and then directly apply force to the kettle cover 1, so as to achieve driving of the conduit 2 and the filter plate 3, thereby improving the installation and removal efficiency of the filter plate 3. Of course, in other embodiments, the kettle cover 1 can also be movably connected to the conduit 2, and after first opening the kettle cover 1, directly applying force to the conduit 2 can also achieve removal and installation of the filter plate 3.

[0040] In order to improve the installation stability of the filter plate 3 in the filter kettle body and accurately limit the installation position of the filter plate 3, the filter kettle body provided in the embodiment of the utility model includes an upper kettle body 8 and a lower kettle body 9. Specifically, the filter kettle body is above the filter plate 3 as the upper kettle body 8, and the filter kettle body is below the filter plate 3 as the lower kettle body 9. The radial size of the inner cavity of the upper kettle body 8 is adapted to the filter plate 3, and the radial size of the inner cavity of the lower kettle body 9 gradually decreases downward. For example, Figure 1 As shown, the cross-sectional diameter of the upper kettle body 8 is uniformly set, the inner cavity of the lower kettle body 9 is a conical structure with a gradually decreasing lower end, the radial size of the filter plate 3 is adapted to the radial size of the upper kettle body 8, but can move vertically within the range of the upper kettle body 8. When it moves to the junction of the upper kettle body 8 and the lower kettle body 9, the inner cavity size of the lower kettle body 9 gradually decreases, which will limit the filter plate 3 from continuing to move within the range of the lower kettle body 9, thereby limiting the filter plate 3 from being stably installed at the junction of the upper kettle body 8 and the lower kettle body 9, and also ensuring that the filter plate 3 can move upward in the upper kettle body 8 until it is separated from the filter kettle body.

[0041] Furthermore, a discharge valve 10 is provided at the bottom of the lower kettle body 9. In the purified waste oil 15 under the filter plate 3, gravity can be used to physically settle part of the particulate matter in the purified waste oil 15. The sediment 14 obtained by the sedimentation will be enriched at the bottom of the lower kettle body 9. By providing the discharge valve 10 at the bottom of the lower kettle body 9, the sediment 14 can be discharged from the lower kettle body 9, thereby improving the purification degree of the entire purified waste oil 15. The specific stratification of the waste oil can be as follows: Figure 1 As shown, the top layer is unpurified waste oil 17, near the filter plate 3 and above the filter plate 3 are large particle impurities 16, below the filter plate 3 is the purified waste oil layer 15, and the bottom of the purified waste oil layer 15 is small particle sediment 14.

[0042] As a preferred embodiment of the present invention, a flexible rubber ring 11 can be provided on the outer edge of the filter plate 3, as shown in FIG. Figure 2As shown, the flexible rubber ring 11 can indirectly isolate the filter plate 3 from the inner cavity of the filter kettle body, so that there is no friction between the filter plate 3 and the inner cavity wall of the filter kettle body, which may cause wear of the filter plate 3 or the filter kettle body, further protecting the filter plate 3 and the filter kettle body. Of course, two support feet 12 can also be symmetrically arranged at the bottom of the filter kettle body to support the entire filter kettle body. The symmetric support feet 12 can provide better stability to ensure that the filter kettle body remains horizontal and stable during the filtration and oil drainage processes. Of course, in other embodiments, other methods can be used for support, and the number of support feet 12 is not limited here, as long as the purpose of sufficient support stability can be achieved.

[0043] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention. It should be noted that the structures or components illustrated in the drawings are not necessarily drawn to scale, and the present invention omits the description of well-known components and processing techniques and processes to avoid unnecessarily limiting the present invention.

Claims

1. A waste oil filtering device, comprising a filtering kettle, characterized in that: The filter kettle body has an opening facing upward, and a kettle cover (1) is movably covered on the opening. A conduit (2) is provided through the kettle cover (1). One end of the conduit (2) can be inserted into the interior of the filter kettle body, and is used to transport the purified waste oil filtered inside the filter kettle body to the outside of the filter kettle body. A filter plate (3) is arranged in the kettle body, the conduit (2) can penetrate the filter plate (3), the filter plate (3) is arranged at the upper end of the end of the conduit (2), and the conduit (2) can drive the filter plate (3) to move vertically inside the filter kettle body and detach from the filter kettle body.

2. A waste oil filtering device according to claim 1, characterized in that: An inlet cover (4) is provided at the purified waste oil inlet end of the conduit (2); the inlet cover (4) is trumpet-shaped, and its diameter gradually increases from top to bottom; a filter screen (5) is provided at the free end of the inlet cover (4); and the filter holes on the filter plate (3) have a larger size than the filter holes on the filter screen (5).

3. A waste oil filtering device according to claim 2, characterized in that: The filter screen (5) protrudes downward from the inlet cover (4) in a free state, and when the conduit (2) is connected to a mechanical pump to perform oil discharge operation, the filter screen (5) can be recessed upward in the inlet cover (4).

4. A waste oil filtering device according to claim 2, characterized in that: The filter plate (3) is provided with a through hole (6), the conduit (2) passes through the through hole (6) and can slide relative to the filter plate (3), and the maximum radial diameter of the inlet cover (4) is greater than the diameter of the through hole (6).

5. A waste oil filtering device according to claim 4, characterized in that: The inlet cover (4) is detachably connected to the conduit (2).

6. The waste oil filtering device according to claim 1, characterized in that: The conduit (2) is fixedly connected to the kettle cover (1), and a hanging ring (7) is provided on the kettle cover (1).

7. The waste oil filtering device according to claim 1, characterized in that: The filtering kettle body is an upper kettle body (8) above the filter plate (3), and is a lower kettle body (9) below the filter plate (3). The radial size of the inner cavity of the upper kettle body (8) is adapted to the filter plate (3), and the radial size of the inner cavity of the lower kettle body (9) gradually decreases downward.

8. A waste oil filtering device according to claim 7, characterized in that: A discharge valve (10) is provided at the bottom of the lower kettle body (9).

9. The waste oil filtering device according to claim 7, characterized in that: The outer edge of the filter plate (3) is provided with a flexible rubber ring (11).

10. The waste oil filtering device according to claim 1, characterized in that: Two supporting feet (12) are symmetrically arranged at the bottom of the filtering kettle body.

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