A waste emulsion pretreatment device

Abstract

This utility model provides a waste emulsion pretreatment device, including an air flotation tank. A necked-down collecting cylinder is installed at the top of the air flotation tank. A sliding cylinder with a sliding seal fits inside the necked-down collecting cylinder. A float is installed inside the sliding cylinder. A guide post penetrating the bottom of the sliding cylinder is fixedly connected to the bottom of the float. A sealing sleeve with a gap is fixedly connected to the bottom of the sliding cylinder, fitted outside the guide post. By installing a sliding cylinder inside the necked-down collecting cylinder, with inlets and outlets on its outer peripheral wall, and a float, guide post, sealing sleeve, and flow port inside the sliding cylinder, the collected oil and scum can be lifted when the sliding cylinder moves upward. When the inlet and outlet are higher than the opening of the necked-down collecting cylinder, the collected oil and scum overflow directly through the inlet and outlet, thus separating the oil and scum from the emulsion. This method has the advantage of more efficient oil and scum separation.

Description

Technical Field

[0001] This utility model relates to the field of emulsion pretreatment technology, specifically a waste emulsion pretreatment device. Background Technology

[0002] Waste emulsions mainly come from industries such as mechanical cutting, mining machinery processing, and cold rolling mills. During the cutting and rolling of metal materials, emulsions play roles such as condensation, lubrication, and rust prevention. After being recycled multiple times, they will deteriorate and have to be replaced or discarded due to reduced performance. The replaced or discarded emulsions need to be discharged, and pollution-free treatment is required before discharge.

[0003] Utility model CN211170264U discloses a waste emulsion pretreatment device, including a coarse sludge filtration tank connected to a waste emulsion storage tank. Following the coarse sludge filtration tank are sequentially connected a demulsification pipe, a primary flotation mechanism, and a secondary flotation mechanism. A fine sludge filtration mechanism is located between the primary and secondary flotation mechanisms. Multiple ultrasonic devices are installed on the demulsification pipe. This emulsion pretreatment device utilizes the coarse sludge filtration tank for initial coarse sludge filtration, and then uses the sequentially arranged demulsification pipe, primary flotation mechanism, fine sludge filtration mechanism, and secondary flotation mechanism to fully separate oil and water, efficiently and smoothly completing the emulsion pretreatment process. This ensures thorough dehydration of the floating oil and sludge in the emulsion, facilitating further processing of the emulsion.

[0004] Although the above-mentioned treatment device can effectively pretreat waste emulsion, the proposed air flotation mechanism for oil-sludge separation has shortcomings in use: the existing technology sets a sludge scraping mechanism at the top of the air flotation tank. Because oil is fluid and sludge particles are small and dispersed over a large area, the scraping mechanism has low efficiency in scraping oil and sludge. Simply put, it has the defect of low efficiency in separating oil and sludge from emulsion.

[0005] Therefore, this utility model provides a waste emulsion pretreatment device. Utility Model Content

[0006] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a waste emulsion pretreatment device to solve the problems mentioned in the background technology. This utility model has the function of overflow control to separate oil and scum from emulsion, which greatly improves the efficiency of separating and treating emulsion from floating oil and fine scum.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a waste emulsion pretreatment device, comprising an air flotation tank, a necked-down gathering cylinder at the top of the air flotation tank, a sliding cylinder with a sliding and sealing fit inside the necked-down gathering cylinder, a floating plate inside the sliding cylinder, a guide post fixedly connected to the bottom of the floating plate penetrating the bottom of the sliding cylinder, a sealing sleeve with a gap fitted outside the guide post fixedly connected to the bottom of the sliding cylinder, a flow port located inside the sealing sleeve at the bottom of the sliding cylinder, a sealing plate fixedly fitted outside the guide post above the sealing sleeve, and an inlet and outlet near the top on the outer peripheral wall of the sliding cylinder.

[0008] Furthermore, the flotation tank and the necked agglomeration cylinder are fixedly connected by a conical cylinder with the small end facing upwards.

[0009] Furthermore, a breathing tube is connected through the bottom of the slide, and the top of the breathing tube is higher than the top opening of the slide.

[0010] Furthermore, an oil residue collection cylinder is fixedly sleeved on the outside of the constricted collecting cylinder, and a discharge pipe is fixedly connected to the bottom of the oil residue collection cylinder.

[0011] Furthermore, a crossbeam located above the constricted collecting cylinder is fixedly connected to the top of the oil residue collecting cylinder, a rotating sleeve is provided in the middle of the crossbeam, a cantilever located below the crossbeam is fixedly connected to the outer peripheral wall of the rotating sleeve, and a scraper located at the bottom of the oil residue collecting cylinder is fixedly connected to the bottom of the cantilever via a connecting rod.

[0012] Furthermore, a sealing sleeve is fixedly fitted inside the necked-up gathering cylinder, and a sealing gasket is adhered to the top of the sealing sleeve.

[0013] Furthermore, the number of inlets and outlets is at least three and they are evenly distributed around the circumference of the slide.

[0014] The beneficial effects of this utility model are as follows:

[0015] 1. In this utility model, a constricted agglomerating cylinder is set at the top of the flotation tank. The oil and scum floating in the emulsion will rise and then gather in the constricted agglomerating cylinder, which facilitates centralized separation and treatment, and reduces the difficulty of separating the floating oil and scum from the emulsion.

[0016] 2. In this utility model, a slide cylinder is provided inside the constricted collecting cylinder. The outer peripheral wall of the slide cylinder has an inlet and outlet. The slide cylinder is provided with a float, guide column, sealing sleeve and flow port. When the slide cylinder moves upward, it can lift the collected oil and scum inside. When the inlet and outlet are higher than the opening of the constricted collecting cylinder, the collected oil and scum will overflow directly through the inlet and outlet. At this time, the oil and scum are separated from the emulsion, which has the advantage of more efficient separation of oil and scum. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a waste emulsion pretreatment device according to the present invention;

[0018] Figure 2 This is a schematic diagram of the slide, floating plate and guide column of a waste emulsion pretreatment device according to this utility model;

[0019] Figure 3 for Figure 2 A diagram at the bottom;

[0020] Figure 4 This is a schematic diagram of the slide cylinder of the waste emulsion pretreatment device of this utility model rising to overflow and discharge oil residue.

[0021] In the diagram: 1. Flotation tank; 2. Necked collection cylinder; 22. Sealing sleeve; 3. Slide cylinder; 31. Sealing sleeve; 311. Sealing gasket; 32. Flow port; 33. Inlet and outlet; 34. Breathing pipe; 4. Float; 5. Guide column; 6. Sealing plate; 7. Conical cylinder; 8. Oil residue collection cylinder; 81. Discharge pipe; 82. Crossbeam; 101. Rotating sleeve; 102. Cantilever; 1021. Connecting rod; 1022. Scraper. Detailed Implementation

[0022] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0023] Please see Figures 1 to 4 This utility model provides a technical solution: a waste emulsion pretreatment device, including an air flotation tank 1, with a bubble tube installed at the bottom of the air flotation tank 1. When the bubble tube exhausts air, it can accelerate the floating of oil and fine residue in the emulsion.

[0024] A constricted collecting cylinder 2 is installed at the top of the flotation tank 1. The inner diameter of the constricted collecting cylinder 2 is smaller than that of the flotation tank 1. Oil and fine sludge that float with the gas will gather in the constricted collecting cylinder 2. Preferably, the flotation tank 1 and the constricted collecting cylinder 2 are fixedly connected by a conical cylinder 7 with the small end facing upward. The conical cylinder 7 serves to guide the oil, fine sludge, and air bubbles upward. A sliding cylinder 3 with a sliding and sealing fit is installed inside the constricted collecting cylinder 2. Specifically, a sealing sleeve 22 is fixedly fitted inside the constricted collecting cylinder 2. The top of the sliding cylinder 3 is open, and a float 4 is installed inside the sliding cylinder 3. A guide post 5 that penetrates the bottom of the sliding cylinder 3 is fixedly connected to the bottom of the float 4. The emulsion applies buoyancy to the float 4. When the guide post 5 moves up and down relative to the sliding cylinder 3, the float 4 moves up and down synchronously.

[0025] A sealing sleeve 31 is fixedly connected to the bottom of the slide cylinder 3, with a gap fitted around the outside of the guide post 5. A flow port 32 is opened at the bottom of the slide cylinder 3, located inside the sealing sleeve 31. A sealing plate 6 is fixedly fitted around the outside of the guide post 5, located above the sealing sleeve 31. Specifically, a sealing gasket 311 is adhered to the top of the sealing sleeve 31. When the bottom of the sealing plate 6 is in contact with the sealing gasket 311, the upper opening of the sealing sleeve 31 is sealed. A baffle plate is welded to the bottom of the guide post 5, located below the slide cylinder 3. When the guide post 5 descends until the sealing plate 6 and the top of the sealing sleeve 31 are in contact, the flow port 32 is effectively closed, and at this time, the emulsion in the slide cylinder 3 and the emulsion in the flotation tank 1 do not flow. An inlet / outlet 33 is opened on the outer peripheral wall of the slide cylinder 3 near the top. Preferably, the number of inlets / outlets 33 is at least three and they are evenly distributed around the circumference of the slide cylinder 3. When the slide 3 rises to the level of the bottom of the inlet / outlet 33 and the top surface of the flotation tank 1, the oil and fine sludge above the inlet / outlet 33 in the slide 3 will overflow outward through the inlet / outlet 33. It should be noted that after the sealing plate 6 seals the sealing sleeve 31, the liquid level of the emulsion in the slide 3 is approximately level with the bottom of the inlet / outlet 33, and the float 4 is in a state where the top height is higher than the oil and fine sludge. The float 4 is made according to this state (buoyancy magnitude) to avoid discharging part of the emulsion when overflowing and discharging floating oil and fine sludge, while also separating and discharging the oil and fine sludge.

[0026] The bottom of the slide cylinder 3 is connected to a breathing tube 34. The top of the breathing tube 34 is higher than the top opening of the slide cylinder 3. The breathing tube 34 is designed to prevent the formation of negative pressure in the flotation tank 1 that would affect the upward movement of the slide cylinder 3 when the slide cylinder 3 moves upward and the inlet and outlet 33 are blocked by the constriction and aggregation cylinder 2.

[0027] In this embodiment, an oil residue collection cylinder 8 is fixedly sleeved on the outside of the constricted gathering cylinder 2. The function of the oil residue collection cylinder 8 is to collect the overflowing oil and fine residue. A discharge pipe 81 is fixedly connected to the bottom of the oil residue collection cylinder 8. The function of the discharge pipe 81 is to discharge the oil and fine residue in the oil residue collection cylinder 8 to the outside.

[0028] Furthermore, a crossbeam 82 located above the constricted collecting cylinder 2 is fixedly connected to the top of the oil sludge collecting cylinder 8. A rotating sleeve 101 is provided in the middle of the crossbeam 82. A cantilever 102 located below the crossbeam 82 is fixedly connected to the outer peripheral wall of the rotating sleeve 101. A scraper 1022 located at the bottom of the oil sludge collecting cylinder 8 is fixedly connected to the bottom of the cantilever 102 via a connecting rod 1021. When the rotating sleeve 101 rotates, it can drive the scraper 1022 to revolve. When the scraper 1022 revolve, it can accelerate the discharge of oil and fine sludge in the oil sludge collecting cylinder 8. In use, a belt drive assembly for driving the rotating sleeve 101 to rotate can be installed on the crossbeam 82.

[0029] In this embodiment, a lifting drive assembly is installed between the top of the oil residue collection cylinder 8 and the slide cylinder 3. The lifting drive assembly adopts a lifting traction structure driven by two sets of synchronous hydraulic cylinders. The purpose is to provide driving force for the lifting of the slide cylinder 3. The driving method of synchronous action of the two sets of synchronous hydraulic cylinders is the prior art, and will not be described in detail in this application.

[0030] Working principle: The initial state of the slide 3 is at the bottom of the constricted agglomerating cylinder 2, so that the constricted agglomerating cylinder 2 is connected to the flotation tank 1 through the inlet and outlet 33. The emulsion containing oil and fine residue is transported into the flotation tank 1 through the inlet pipe using a delivery pump. The liquid level of the emulsion in the flotation tank 1 rises, and the emulsion will enter the constricted agglomerating cylinder 2 through the inlet and outlet 33. Then, the liquid level of the emulsion in the flotation tank 1 is ensured to be at the current height of the top of the slide 3. At this time, the float 4 is submerged in the emulsion, and the sealing plate 6 moves away from the sealing sleeve 31. Then, the external air supply equipment is controlled to supply air to the bubble tube at the bottom of the flotation tank 1. The bubble tube discharges gas, and the gas rises, which in turn drives the oil and fine residue to rise. The oil and fine residue pass through the inlet and outlet 33 and enter the flotation tank 1. The emulsion is collected in the constricted collection cylinder 2, and then the slide cylinder 3 is controlled to rise. When the upper part of the float 4 extends beyond the surface of the emulsion, the float 4 will descend with the emulsion level as the slide cylinder 3 continues to rise. When the sealing plate 6 contacts the sealing sleeve 31, the emulsion level in the slide cylinder 3 no longer changes. The emulsion level is level with the bottom of the inlet and outlet 33. Oil and fine residue float above the emulsion. When the slide cylinder 3 moves up to the bottom of the inlet and outlet 33, which is higher than the top of the constricted collection cylinder 2, the oil and fine residue floating above the emulsion will flow out through the inlet and outlet 33. At this time, the oil and fine residue are separated from the emulsion. Then the slide cylinder 3 is controlled to descend to the initial position. This cycle can quickly and efficiently separate the oil and fine residue from the emulsion.

[0031] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A waste emulsion pretreatment device, comprising an air flotation tank (1), characterized in that, The top of the flotation tank (1) is provided with a constricted gathering cylinder (2), and a sliding cylinder (3) with a sliding and sealing fit is provided inside the constricted gathering cylinder (2). A floating plate (4) is provided inside the sliding cylinder (3). A guide post (5) that penetrates the bottom of the sliding cylinder (3) is fixedly connected to the bottom of the floating plate (4). A sealing sleeve (31) that is gapped outside the guide post (5) is fixedly connected to the bottom of the sliding cylinder (3). A flow port (32) located inside the sealing sleeve (31) is opened at the bottom of the sliding cylinder (3). A sealing plate (6) located above the sealing sleeve (31) is fixedly fitted outside the guide post (5). An inlet and outlet (33) near the top is opened on the outer peripheral wall of the sliding cylinder (3).

2. The waste emulsion pretreatment device according to claim 1, characterized in that: The air flotation tank (1) and the necked agglomeration cylinder (2) are fixedly connected by a conical cylinder (7) with the small end facing upward.

3. The waste emulsion pretreatment device according to claim 1, characterized in that: A breathing tube (34) is connected through the bottom of the slide tube (3), and the top of the breathing tube (34) is higher than the top opening of the slide tube (3).

4. The waste emulsion pretreatment device according to claim 2, characterized in that: The necked gathering cylinder (2) is fixedly fitted with an oil sludge collection cylinder (8), and the bottom of the oil sludge collection cylinder (8) is fixedly connected to a discharge pipe (81).

5. The waste emulsion pretreatment device according to claim 4, characterized in that: The top of the oil residue collection cylinder (8) is fixedly connected to a crossbeam (82) located above the constricted collection cylinder (2). A rotating sleeve (101) is provided in the middle of the crossbeam (82). A cantilever (102) located below the crossbeam (82) is fixedly connected to the outer peripheral wall of the rotating sleeve (101). The bottom of the cantilever (102) is fixedly connected to a scraper (1022) located at the bottom of the oil residue collection cylinder (8) via a connecting rod (1021).

6. The waste emulsion pretreatment device according to claim 1, characterized in that: The constricted gathering cylinder (2) is fixedly fitted with a sealing sleeve (22), and the top of the sealing sleeve (31) is bonded with a sealing gasket (311).

7. The waste emulsion pretreatment device according to claim 1, characterized in that: The number of inlets and outlets (33) is at least three and they are evenly distributed around the circumference of the slide (3).

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