Dechlorination apparatus and method for producing base oil byproduct extract oil from used lubricating oil refining

Abstract

The application discloses a waste lubricating oil refining production base oil byproduct extraction oil dechlorination device in the technical field of waste lubricating oil treatment, which comprises a first mixing chamber, a second mixing chamber is connected to the discharge port of the first mixing chamber, a settling tank is connected to the discharge port of the second mixing chamber, a flash tower is connected to the settling tank, and a feeding hopper is arranged on the first mixing chamber; pressing pieces and heating plates are arranged on the upper and lower sides of the inner cavity of the first mixing chamber, the pressing piece comprises a mounting seat, a frame and a cutting piece, an opening is formed in the bottom of the cutting piece, and the bottom of the mounting seat is provided with a filling piece; a telescopic mechanism is arranged on the first mixing chamber, the metal sodium is heated by the heating plate in the application, so that the metal sodium is melted and conveniently mixed with the subsequent base oil, the metal sodium is prevented from adhering to the cutting equipment, the loss of the metal sodium is avoided, the extraction oil is fully dechlorinated, and a separate cleaning device does not need to be arranged, so that the production cost is reduced.

Description

Dechlorination apparatus and method for extracting base oil byproduct from waste lubricating oil refining Technical Field

[0001] This invention relates to the field of waste lubricating oil treatment technology, specifically to a dechlorination device and method for extracting base oil by-products from the refining of waste lubricating oil. Background Technology

[0002] Lubricating oil is composed of base oil and a certain amount of additives. After a period of use, lubricating oil will lose its normal function due to the introduction of impurities, deterioration of additives, etc., and become waste lubricating oil. In order to save resources, waste lubricating oil will be recycled.

[0003] Waste lubricating oil undergoes a series of processing steps to obtain extracted oil. Before hydrotreating, the extracted oil needs to be dechlorinated, typically using metallic sodium. Sodium reacts with the chlorine in the extracted oil to produce salt, thus removing the chlorine. To ensure sufficient contact between the metallic sodium and the extracted oil, the sodium is cut into small pieces. However, due to the high viscosity of metallic sodium, the cut pieces tend to adhere to the cutting equipment, requiring separate cleaning equipment, which increases costs. Furthermore, incomplete cleaning can lead to sodium loss, resulting in a mismatch between the amount of sodium used and the amount of extracted oil, causing incomplete dechlorination of the extracted oil. Summary of the Invention

[0004] The purpose of this invention is to provide a dechlorination device and method for extracting oil, a byproduct of the refining of waste lubricating oil into base oil, in order to solve the problem mentioned in the background art that the high viscosity of metallic sodium causes it to easily adhere to the cutting equipment, requiring separate cleaning equipment, which increases costs. Furthermore, if the cleaning is not thorough, it will lead to the loss of metallic sodium, resulting in a mismatch between the amount of metallic sodium used and the amount of extracting oil used, causing insufficient dechlorination of the extracting oil.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a dechlorination device for extracting base oil by-products from waste lubricating oil refining, comprising: a first mixing chamber, a second mixing chamber connected to the outlet of the first mixing chamber, a settling tank connected to the outlet of the second mixing chamber, a flash evaporation tower connected to the settling tank, and the dechlorination device further comprising: a feed hopper connected to the first mixing chamber;

[0006] The first mixing chamber has a pressing component and a heating plate on the upper and lower sides of its inner cavity, respectively. The pressing component includes a mounting base, a frame installed at the bottom of the mounting base, and a cutting component in the inner cavity of the frame. The bottom of the cutting component has several sets of openings evenly distributed through it. The bottom of the mounting base has several sets of fillers for filling the openings of the cutting component.

[0007] The first mixing chamber is provided with a telescopic mechanism for driving the pressing member to move up and down, and a moving member for connecting with the cutting member is slidably provided on the first mixing chamber.

[0008] Preferably, the cutting component has a flow channel, and the first mixing chamber is provided with a liquid storage tank. The liquid storage tank is connected to the inlet and outlet of the flow channel through connecting pipes. The liquid storage tank is provided with a heating device for heating the heat exchange medium inside the liquid storage tank and a delivery pump for circulating the heat exchange medium in the flow channel. The cutting component is a metal heat-conducting component.

[0009] Preferably, the mounting base is provided with a magnetic component for adsorbing the cutting part, the cutting part being a magnetic metal component, and an elastic component is provided between the moving component and the mounting base.

[0010] Preferably, the mounting base has a through hole corresponding to the cutting part.

[0011] Preferably, a working box is connected to the first mixing chamber. A push plate for sealing and dividing the inner cavity of the working box is slidably provided inside the working box, as well as a telescopic pusher and a spring connected to the push plate. The working box is provided with a mounting baffle for blocking the outlet of the working box. A one-way valve is provided on the mounting baffle to make the inner cavity of the working box communicate unidirectionally with the inner cavity of the first mixing chamber.

[0012] Preferably, a buffer box is connected to the first mixing chamber. A baffle for pushing out objects inside the buffer box and a support spring connected to the baffle are slidably provided inside the buffer box. The buffer box is connected to the working box through a pipe. When the buffer box receives the mixed liquid inside the first mixing chamber, it drives the baffle to move away from the first mixing chamber, introduces the air inside the buffer box into the inner cavity of the working box through the pipe, and squeezes the push plate to move it closer to the first mixing chamber.

[0013] As a preferred method, the dechlorination method for extracting oil, a byproduct of waste lubricating oil refining into base oil, specifically includes the following steps, based on the dechlorination device for extracting oil from waste lubricating oil refining into base oil:

[0014] S1: Add metallic sodium into the first mixing chamber. The telescopic mechanism moves down with the pressing part to press the metallic sodium into a flat shape between the pressing part and the heating plate. Then, the moving part moves down with the cutting part to cut the flat metallic sodium into small pieces. Then, the heating plate is powered on to heat the metallic sodium. After that, the telescopic mechanism moves up with the pressing part to add base oil into the first mixing chamber to mix with the metallic sodium to form a mixed solution.

[0015] S2: The mixed solution is introduced into the second mixing chamber, and the extracted oil is added into the second mixing chamber to mix and react, thereby dechlorinating the extracted oil;

[0016] S3: The dechlorinated extract oil enters the settling tank for settling, and then is introduced into the flash evaporator for flash evaporation to obtain the dechlorinated extract oil.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: In this application, the sodium metal is flattened by pressing and then cut by cutting on the pressing part, which makes it easy to cut the sodium metal into small pieces. The sodium metal is heated by heating plate to melt it so that it can be easily mixed with the subsequent base oil. It also prevents the sodium metal from sticking to the cutting equipment, avoids the loss of sodium metal, and ensures that the extracted oil is fully dechlorinated. At the same time, there is no need to set up a separate cleaning equipment, which reduces production costs. Attached Figure Description

[0018] Figure 1 is a schematic diagram of the structure of the present invention;

[0019] Figure 2 is a schematic diagram of the first mixing chamber structure of the present invention;

[0020] Figure 3 is a schematic diagram of the pressing component structure of the present invention;

[0021] Figure 4 is a schematic diagram of the connection structure between the mounting base and the frame of the present invention;

[0022] Figure 5 is an enlarged schematic diagram of the structure at point A of the present invention.

[0023] In the diagram: 1. First mixing chamber; 2. Second mixing chamber; 3. Settling tank; 4. Flash evaporator; 5. Feed hopper; 6. Pressing component; 61. Mounting base; 62. Frame; 63. Filler component; 64. Cutting component; 7. Heating plate; 8. Telescopic mechanism; 9. Storage tank; 10. Connecting pipe; 11. Moving component; 12. Elastic component; 13. Through hole; 14. Working box; 15. Push plate; 16. Telescopic push component; 17. Mounting baffle; 18. Check valve; 19. Buffer tank; 20. Baffle. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] Example 1

[0026] Please refer to Figure 1. The dechlorination device for extracting base oil by-products from waste lubricating oil refining includes: a first mixing chamber 1, with a feed hopper 5 connected to the first mixing chamber 1 for feeding into the first mixing chamber 1; a second mixing chamber 2 connected to the outlet of the first mixing chamber 1, with a stirring mechanism (drive motor and stirring blades mounted on the output shaft of the drive motor) installed on the second mixing chamber 2, and a heating device (electric heating plate for heating the interior of the second mixing chamber 2) installed inside the second mixing chamber 2; a settling tank 3 connected to the outlet of the second mixing chamber 2, with the settling tank 3 connected to a transfer pump via a connecting pipe, and the outlet of the transfer pump connected to a flash tower 4.

[0027] Please refer to Figures 1, 2, and 3. The inner cavity of the first mixing chamber 1 is provided with a pressing element 6 and a heating plate 7 on the upper and lower sides, respectively. The pressing element 6 includes a mounting base 61, a frame 62, a filler 63, and a cutting element 64. The frame 62 is installed at the bottom of the mounting base 61, and the cutting element 64 is located in the inner cavity of the frame 62. Several sets of openings are evenly distributed on the bottom of the cutting element 64. Several sets of filler 63 are provided at the bottom of the mounting base 61. The number of filler 63 matches the number of openings. When the cutting element 64 is in the inner cavity of the frame 62, the filler 63 is inserted into the openings to fill them, making the bottom of the pressing element 6 flat and ensuring that the pressing element 6 can press the metallic sodium into a flat shape.

[0028] In this embodiment, as a further optimization, please refer to Figure 3, the mounting base 61 and the frame 62 are detachably connected; so that the various parts of the pressing member 6 can be disassembled for replacement of the various parts in the pressing member 6.

[0029] Please refer to Figure 2. A telescopic mechanism 8 is installed on the first mixing chamber 1. The moving end of the telescopic mechanism 8 is connected to the pressing member 6 (that is, the moving end of the telescopic mechanism 8 is connected to the mounting base 61) to drive the pressing member 6 to move up and down (the telescopic mechanism 8 refers to telescopic equipment such as electric, hydraulic or pneumatic telescopic rods); a moving member 11 is slidably provided on the first mixing chamber 1 (the moving member 11 can move up and down in the first mixing chamber 1), and the bottom end of the moving member 11 is connected to the cutting member 64.

[0030] Please refer to Figures 2 and 4. The mounting base 61 is provided with a magnetic element (electromagnet) for adsorbing the cutting element 64. The cutting element 64 is a magnetic metal element (a metal that can be magnetically adsorbed, such as steel or iron). An elastic element 12 is installed between the moving part 11 and the mounting base 61.

[0031] It should be noted that after the telescopic mechanism 8 moves down with the pressing part 6 and flattens the sodium metal, the electromagnet is de-energized, causing the attraction force of the mounting base 61 on the cutting part 64 to disappear; under the action of the elastic part 12, the moving part 11 moves down with the cutting part 64 to cut the flattened sodium metal into opening-sized pieces.

[0032] In this embodiment, as a further optimized solution, please refer to Figures 2, 3, and 4. A flow channel is provided within the cutting component 64, which is made of a heat-conducting metal material (such as iron or steel). A liquid storage tank 9 is provided on the first mixing chamber 1. Two connecting pipes 10 are installed between the liquid storage tank 9 and the moving component 11. A channel is provided on the moving component 11, connecting the inlet and outlet of the liquid storage tank 9 to the inlet and outlet of the flow channel via the connecting pipes 10 and the channel. A heating device (electric heating plate) is installed inside the liquid storage tank 9 to heat the heat exchange medium inside the liquid storage tank 9. A delivery pump is installed inside the liquid storage tank 9, and the outlet of the delivery pump is connected to a connecting pipe. Pipe 10 is connected to guide the heat exchange medium inside the storage tank 9 into the flow channel, so that the heat exchange medium circulates between the flow channel and the storage tank 9. After the cutting part 64 cuts the metallic sodium, the heating device heats the heat exchange medium stored inside the storage tank 9. Then, the delivery pump introduces the heated heat exchange medium in the storage tank 9 into the flow channel through the connecting pipe 10 and the channel, so that the heat exchange medium flows inside the flow channel and flows back into the inner cavity of the storage tank 9. The circulating heat exchange medium heats the cutting part 64 and the metallic sodium attached to the cutting part 64, so that it softens and detaches.

[0033] In this embodiment, as a further optimization, please refer to Figure 4. A through hole 13 is provided on the mounting base 61, which corresponds to the cutting member 64 and is located directly above the cutting member 64; this reduces the obstruction to the up-and-down movement of the cutting member 64 inside the frame 62.

[0034] Example 2:

[0035] As an optimized solution, please refer to Figures 2 and 5. A working box 14 is connected to the first mixing chamber 1. A push plate 15 is slidably installed inside the working box 14, which seals and divides the inner cavity of the working box 14 into two parts (according to the direction shown in Figure 5, the push plate 15 divides the working box 14 into left and right parts, and the right side cavity is connected to the first mixing chamber 1). A telescopic pusher 16 and a spring are installed between the working box 14 and the push plate 15 (the moving end of the telescopic pusher 16 is in contact with the push plate 15; the telescopic pusher 16 refers to an electric telescopic rod, pneumatic or hydraulic telescopic rod, etc., and the spring is used to pull the push plate 15 so that the push plate 15 can be reset). A mounting baffle 17 is provided on the working box 14 to block the communication area between the working box 14 and the first mixing chamber 1. A one-way valve 18 is provided on the mounting baffle 17 to allow one-way communication between the right side of the inner cavity of the working box 14 and the inner cavity of the first mixing chamber 1.

[0036] Please refer to Figure 5. A buffer box 19 is connected to the first mixing chamber 1. A baffle 20 is slidably installed inside the buffer box 19. The baffle 20 divides the buffer box 19 into two mutually isolated cavities. A support spring is installed between the buffer box 19 and the baffle 20. The buffer box 19 is connected to the working box 14 through a pipe.

[0037] It should be noted that when the base oil enters the first mixing chamber 1 and mixes with metallic sodium, the telescopic pusher 16 is controlled to move the pusher plate 15 to the right, allowing air from the working chamber 14 to enter the first mixing chamber 1 through the one-way valve 18. This agitates the mixture, achieving a stirring effect. Furthermore, it eliminates the need for a stirring device inside the first mixing chamber 1, thus avoiding interference with the operation of the pressing component 6. When gas is injected into the first mixing chamber 1, the internal pressure increases, causing either the gas or the mixed liquid inside the first mixing chamber 1 to enter the buffer zone. In the storage tank 19, the pressure inside the first mixing chamber 1 is reduced. During this process, the baffle 20 moves to the left, which will squeeze the air inside the storage tank 19 into the working tank 14, increasing the air pressure on the left side of the working tank 14. This will push the push plate 15 to the right, increasing the amount of air entering the first mixing chamber 1 from the working tank 14, increasing the amplitude of the mixing liquid inside the first mixing chamber 1, and making the base oil and metallic sodium fully mixed (the working tank 14 is provided with an air inlet for supplementing air into the working tank 14, and a valve is provided on the air inlet for closing the air inlet).

[0038] A dechlorination method for extracting oil, a byproduct of base oil production from waste lubricating oil refining, specifically includes the following steps, based on a dechlorination device for extracting oil from waste lubricating oil refining:

[0039] S1: Add metallic sodium into the first mixing chamber 1. The telescopic mechanism 8 moves downward with the pressing part 6 to press the metallic sodium, making it flat and positioned between the pressing part 6 and the heating plate 7. The electromagnet is de-energized, causing the attraction force of the mounting base 61 on the cutting part 64 to disappear. Under the action of the elastic part 12, the moving part 11 moves downward with the cutting part 64 to cut the flattened metallic sodium into opening-sized pieces. Then, the heating plate 7 is energized to heat the metallic sodium. After that, the telescopic mechanism 8 moves upward with the pressing part 6 to add base oil from the feed hopper 5 into the first mixing chamber 1, mixing the base oil with the metallic sodium. Continue heating to melt the metallic sodium and mix it with the base oil to form a mixed solution (the mass ratio of metallic sodium to base oil is 1:20-30).

[0040] S2: The mixed solution is introduced into the second mixing chamber 2, and the extracted oil is added into the second mixing chamber 2. The two are stirred and mixed using a stirring mechanism (the sodium content in the mixture is 1%-3%), and the mixture is heated using a heating device (heated to 120℃-180℃) for 30min-60min to allow the two to mix and react, thereby dechlorinating the extracted oil.

[0041] S3: After dechlorination, the extracted oil enters the settling tank 3 for settling, and the salt produced by the reaction settles down. Then, the dechlorinated extracted oil is introduced into the flash distillation tower 4 for flash distillation to obtain the dechlorinated extracted oil.

[0042] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A dechlorination unit for extracting base oil, a byproduct of waste lubricating oil refining, comprising: The first mixing chamber (1) is connected to the outlet of the first mixing chamber (1) and a second mixing chamber (2) is connected to the outlet of the second mixing chamber (2) and a settling tank (3) is connected to the settling tank (3) and a flash tower (4). The dechlorination device is characterized in that: the dechlorination device further includes: a feed hopper (5) connected to the first mixing chamber (1); the upper and lower sides of the inner cavity of the first mixing chamber (1) are respectively provided with a pressing element (6) and a heating plate (7), the pressing element (6) includes a mounting base (61), a frame (62) installed at the bottom of the mounting base (61) and a cutting element (64) in the inner cavity of the frame (62), the bottom of the cutting element (64) is evenly provided with several sets of openings, the bottom of the mounting base (61) is provided with several sets of filling elements (63) for filling the openings of the cutting element (64); the first mixing chamber (1) is provided with a device for driving the pressing element (6) The first mixing chamber (1) is provided with a telescopic mechanism (8) that moves up and down. A movable part (11) for connecting with the cutting part (64) is slidably provided on the first mixing chamber (1). A magnetic part for adsorbing the cutting part (64) is provided on the mounting base (61). The cutting part (64) is a magnetic metal part. An elastic part (12) is provided between the movable part (11) and the mounting base (61). A flow channel is opened in the cutting part (64). A liquid storage tank (9) is provided on the first mixing chamber (1). The liquid storage tank (9) is connected to the inlet and outlet of the flow channel through a connecting pipe (10). A heating device for heating the heat exchange medium inside the liquid storage tank (9) and a delivery pump for circulating the heat exchange medium in the flow channel are provided in the liquid storage tank (9). The cutting part (64) is a metal heat-conducting part. A through hole (13) corresponding to the cutting part (64) is opened through the mounting base (61).

2. The dechlorination device for extracting base oil by-products from waste lubricating oil refining according to claim 1, characterized in that: The first mixing chamber (1) is connected to a working box (14). The working box (14) is slidably provided with a push plate (15) for sealing and dividing the inner cavity of the working box (14), and a telescopic push member (16) and a spring member connected to the push plate (15). The working box (14) is provided with an installation baffle (17) for blocking the outlet of the working box (14). The installation baffle (17) is provided with a one-way valve (18) so that the inner cavity of the working box (14) is unidirectionally connected to the inner cavity of the first mixing chamber (1).

3. The dechlorination device for extracting base oil by-products from waste lubricating oil refining according to claim 2, characterized in that: A buffer box (19) is connected to the first mixing chamber (1). A baffle (20) for pushing out objects inside the buffer box (19) and a support spring connected to the baffle (20) are slidably provided inside the buffer box (19). The buffer box (19) is connected to the working box (14) through a pipe. When the buffer box (19) receives the mixed liquid inside the first mixing chamber (1), it drives the baffle (20) to move away from the first mixing chamber (1), introduces the air inside the buffer box (19) into the inner cavity of the working box (14) through the pipe, and squeezes the push plate (15) to move it closer to the first mixing chamber (1).

4. A method for dechlorinating the extract oil, a byproduct of base oil production from waste lubricating oil refining, according to claim 1, characterized in that: Specifically, the following steps are included: S1: Add metallic sodium into the first mixing chamber (1). The telescopic mechanism (8) moves down with the pressing part (6) to press the metallic sodium, making it flat between the pressing part (6) and the heating plate (7). Then the moving part (11) moves down with the cutting part (64) to cut the flat metallic sodium into small pieces. Then the heating plate (7) is powered on to heat the metallic sodium. The telescopic mechanism (8) moves up with the pressing part (6) to add base oil into the first mixing chamber (1) and mix with metallic sodium to form a mixed solution. S2: The mixed solution is introduced into the second mixing chamber (2), and the extracted oil is added into the second mixing chamber (2) to mix and react, and the extracted oil is dechlorinated. S3: The dechlorinated extracted oil enters the settling tank (3) for settling, and then enters the flash evaporator (4) for flash evaporation to obtain the dechlorinated extracted oil.

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