A vertical desorption system for diatomaceous earth white oil

Abstract

This utility model discloses a vertical desorption system for diatomaceous earth white oil, belonging to the field of electrolytic aluminum technology. It includes a vertical desorption tank, a heating component, and a condenser. The vertical desorption tank has a feeding port and a discharge port at its top and bottom, respectively. The heating component heats the diatomaceous earth in the vertical desorption tank, causing the white oil and moisture to evaporate. The gas in the vertical desorption tank enters the condenser, and a storage device is provided at the bottom of the condenser. This utility model designs a vertical desorption tank, using a steam generator as the heating device to gradually increase the temperature of the diatomaceous earth and white oil. Ultimately, the white oil and moisture in the diatomaceous earth are evaporated and desorbed. The mixture of white oil and moisture enters the condenser under the action of a vacuum pump and condenses and liquefies, achieving the desorption and recovery of white oil from the diatomaceous earth. It features high recovery efficiency and good desorption effect.

Description

Technical Field

[0001] This utility model relates to the field of electrolytic aluminum technology, specifically to a vertical desorption system for diatomaceous earth white oil. Background Technology

[0002] When producing aluminum products in the electrolytic aluminum industry, a large amount of white oil is needed as a lubricant and coolant, resulting in a large amount of white oil adhering to the surface of the finished aluminum products. However, excessive white oil residue is not allowed on the surface of the finished aluminum products. In order to save on the amount of white oil used, diatomaceous earth is generally used to recycle the white oil on the surface of the aluminum products, that is, to use diatomaceous earth to absorb the white oil on the surface of the aluminum products.

[0003] After use, diatomaceous earth wall coverings absorb a large amount of white oil. To enable the diatomaceous earth wall coverings to be reused, the traditional recycling method is to use a filter press to filter the diatomaceous earth wall coverings that have absorbed white oil. However, the filter press method can only filter out the free white oil adsorbed on the surface of the diatomaceous earth wall coverings, and cannot filter out the white oil in the pores and between molecules of the diatomaceous earth wall coverings. Utility Model Content

[0004] In view of the above-mentioned technical deficiencies, the purpose of this utility model is to provide a vertical desorption system for white oil from diatomaceous earth, which improves the degree of desorption of white oil from diatomaceous earth by setting up heating components and a vertical desorption tank.

[0005] To solve the above-mentioned technical problems, this utility model adopts the following technical solution: This utility model provides a vertical desorption system for diatomaceous earth white oil, comprising: A vertical desorption tank is provided with a feeding port and a discharge port at the top and bottom, respectively. The feeding port is provided with a sealing cover, and the discharge port is provided with a discharge valve. A material scattering mechanism is provided inside the vertical desorption tank. Heating components are used to heat the diatomaceous earth in the vertical desorption tank, causing the white oil and moisture to evaporate; A condenser is connected to a vertical desorption tank. Gas from the vertical desorption tank enters the condenser. A storage device is provided at the bottom of the condenser, and a vacuum pump is connected to one side of the condenser.

[0006] Preferably, the material dispersing mechanism includes: The cylinder is fixed inside the vertical desorption tank; A rotating shaft is rotatably mounted in a vertical desorption tank and passes through the cylinder; the rotating shaft is provided with helical blades. Multiple agitators are fixed on a rotating shaft on the lower side of the cylinder.

[0007] Preferably, a bulk material grid is provided on the outer wall of the top of the cylinder, and the bulk material grid is stepped.

[0008] Preferably, the heating assembly includes a steam generator, which has a water inlet and a steam outlet. The steam generator replenishes water through the water inlet and heats the water, and then discharges the steam through the steam outlet into the vertical desorption tank.

[0009] Preferably, the vertical desorption tank is provided with multiple steam nozzles, which are connected to the outlet of a steam generator through pipes, and the multiple steam nozzles are arranged in a ring on the inner wall of the vertical desorption tank.

[0010] Preferably, the steam nozzle is inclined so that the steam forms a swirling flow inside the vertical desorption tank.

[0011] Preferably, the storage device includes a storage tank, which is located below and connected to the condenser. A level gauge is installed inside the storage tank, and a drain valve is installed at the bottom of the storage tank.

[0012] Preferably, the storage tank is provided with a transparent observation section, which is used to observe the separation position of white oil and water.

[0013] Preferably, the condenser is provided with a cooling coil, the two ends of which extend out of the condenser and are respectively connected to the inlet and outlet water pipes of an external circulating cooling device.

[0014] Preferably, a vibratory hammer is provided on the bottom outer wall of the vertical desorption tank.

[0015] The beneficial effects of this utility model are as follows: This invention designs a vertical desorption tank. Diatomaceous earth containing white oil is placed into the tank, and a steam generator is used as a heating device to supply heated steam into the vertical desorption tank. This causes the temperature of the diatomaceous earth and white oil to gradually rise, eventually evaporating and desorbing the white oil and water in the diatomaceous earth. The mixture of white oil and water is condensed and liquefied in a condenser under the action of a vacuum pump. The mixture of white oil and water in the storage device will separate into layers, allowing for separation and discharge. This achieves the desorption and recovery of white oil from the diatomaceous earth, featuring high recovery efficiency and good desorption effect, solving the problem of insufficient desorption in the existing pressure filtration desorption method. The vertical desorption tank designed in this invention is equipped with a cylinder, a rotating shaft, and spiral blades. The spiral blades can cooperate with the cylinder to transport the diatomaceous earth to a high position and then drop it. After passing through the material grid, the dispersion of the diatomaceous earth is improved, and the gaps between the diatomaceous earth particles are increased, allowing for more thorough contact between the steam and the diatomaceous earth, thereby increasing the evaporation and desorption rate of white oil. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of a vertical desorption system for diatomaceous earth white oil provided in an embodiment of the present invention.

[0018] Figure 2 This is a perspective view of the neutral desorption tank of this utility model.

[0019] Figure 3 This is a front view of the neutral desorption tank of this utility model.

[0020] Figure 4 for Figure 3 Sectional view at point AA.

[0021] Figure 5 This is a top view of the neutral desorption tank of this utility model.

[0022] Figure 6 for Figure 5 Sectional view at point BB.

[0023] Figure 7 This is a perspective view of the material scattering mechanism in this utility model.

[0024] Explanation of reference numerals in the attached figures: 1. Vertical desorption tank; 2. Feed inlet; 3. Discharge outlet; 4. Sealing cover; 5. Tank cover; 6. Discharge valve; 7. Condenser; 8. Vacuum pump; 9. Cylinder; 10. Rotating shaft; 11. Spiral blade; 12. Agitator; 13. Bulk grid; 14. Steam generator; 15. Water inlet; 16. Steam nozzle; 17. Storage tank; 18. Drain valve; 19. Circulating cooling device; 20. Motor. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Example 1: like Figures 1 to 7As shown, Embodiment 1 of this utility model provides a vertical desorption system for diatomaceous earth white oil, mainly including a vertical desorption tank 1, a heating assembly, a condenser 7, and a vacuum pump 8. The vertical desorption tank 1 is a vertically arranged cylindrical sealed tank with a tank cover 5 at the top. The tank cover 5 has a feeding port 2, which is sealed by a sealing cap 4, and the tank cover 5 is sealed to the tank body. The bottom of the vertical desorption tank 1 is funnel-shaped and has a discharge port 3. A discharge valve 6 is installed at the discharge port 3 to control the start and stop of the discharge.

[0027] The vertical desorption tank 1 is equipped with a material dispersing mechanism to ensure that the added diatomaceous earth containing white oil is fully dispersed within the tank, increasing the contact area with the heating medium. The material dispersing mechanism can use a conventional stirring shaft structure.

[0028] The heating component uses a steam generator 14, which is connected to the interior of the vertical desorption tank 1 through a pipe. Saturated steam at 0.4 to 0.5 MPa is introduced into the tank to directly heat the diatom mud inside the tank, raising the temperature of the diatom mud to 130 to 140°C. At this time, the white oil and moisture adsorbed inside the diatom mud are rapidly vaporized and desorbed.

[0029] One side of the vertical desorption tank 1 is connected to the condenser 7 via a pipe, and the condenser 7 is connected to a vacuum pump 8. The white oil vapor and water vapor generated during desorption inside the tank are drawn into the condenser 7 under the negative pressure (approximately -0.098 MPa) generated by the vacuum pump 8. A storage device is installed at the bottom of the condenser 7 to collect the condensed mixture of white oil and water. Since white oil is less dense than water, the two naturally separate after standing for 10-15 minutes, allowing them to be discharged separately and the white oil recovered.

[0030] In use, first open the sealing cover 4 of the feeding port 2, put the diatomaceous earth containing white oil into the vertical desorption tank 1, and close the sealing cover 4; start the vacuum pump 8 to make the system reach a negative pressure of about -0.098MPa; turn on the steam generator 14 to introduce saturated steam into the tank for heating; after the white oil and water vaporize, they enter the condenser 7 to condense and liquefy, and flow into the bottom storage device; after one batch of desorption is completed, stop heating, let it stand for about 10 minutes, and after the oil and water separate, discharge the lower layer of water and collect and recover the upper layer of white oil; open the bottom discharge valve 6 to discharge the cleaned diatomaceous earth.

[0031] Example 2 This embodiment, based on Embodiment 1, further adds auxiliary unloading and a more refined recycling structure. First, the storage device uses an independent storage tank 17, with transparent observation sections on the upper and lower parts of the tank's side wall, facilitating observation of the stratification of white oil and water from multiple heights. A drain valve 18 is located at the bottom of the storage tank 17, allowing the lower layer of water to be drained first, followed by switching to another container to collect the upper layer of pure white oil. The storage tank 17 is also equipped with high and low level gauges; when the liquid level reaches the high level, the steam generator 14 automatically shuts off and issues a warning to prevent the liquid level from becoming too high.

[0032] To prevent diatomaceous earth from clumping at the bottom of the tank after desorption, a pneumatic vibrating hammer is installed on the outer wall of the bottom of the vertical desorption tank 1. The vibrating hammer is turned on for 30 to 60 seconds before discharge, which can quickly loosen the diatomaceous earth adhering to the wall and discharge it smoothly from the discharge port 3, shortening the discharge time and basically achieving zero residue.

[0033] Example 3 Based on Examples 1 and 2, this example further optimizes the material scattering mechanism, steam distribution method, and condensation recovery structure.

[0034] like Figures 3 to 7 As shown, a vertical cylinder 9 is fixed inside the vertical desorption tank 1. A rotatable shaft 10 passes through the middle of the cylinder 9, and a motor 20 for driving the shaft 10 is fixed on the tank cover 5. A spiral blade 11 is fixed to the upper part of the shaft 10, and multiple stirring paddles 12 are fixed to the lower part. The spiral blade 11 is located inside the cylinder 9. A multi-layered stepped bulk material grid 13 is fixed to the outer wall of the top of the cylinder 9.

[0035] During operation, the rotating shaft 10 is driven to rotate by the motor 20 on the top of the tank. The spiral blades 11 continuously transport the diatomaceous earth from the bottom to the top of the cylinder 9. The diatomaceous earth falls from the material grid 13 in a waterfall-like manner, falls back to the bottom of the tank, and is then lifted again by the spiral blades 11, forming a continuous internal circulation. This ensures that the diatomaceous earth is highly dispersed and fully contacts the steam, significantly accelerating the desorption speed of the white oil. The stirring paddle 12 also performs a conventional stirring function, continuously turning the material.

[0036] The saturated steam generated by the steam generator 14 is distributed through an annular main pipe to multiple inclined steam nozzles 16 on the inner wall of the tank. The inclination angle of the steam nozzles 16 causes the steam to form a rotating airflow inside the tank, further enhancing the heat and mass transfer effect. The water inlet 15 of the steam generator 14 can continuously replenish water to the steam generator 14.

[0037] The condenser 7 is equipped with a cooling coil, with its two ends connected to the inlet and outlet water pipes of the external circulating cooling device 19, respectively. The cooling water temperature is controlled at 15-25°C, which can quickly condense the white oil vapor and water vapor entering the condenser 7 into liquid, which then flows into the bottom storage tank 17. The circulating cooling device 19 can use a conventional air-cooled cooling system or a cooling system with a compressor.

[0038] Obviously, those skilled in the art can make various modifications and variations to this utility model without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this utility model and their equivalents, this utility model also intends to include these modifications and variations.

Claims

1. A vertical desorption system for diatomaceous earth white oil, characterized in that, include: A vertical desorption tank is provided with a feeding port and a discharge port at the top and bottom, respectively. The feeding port is provided with a sealing cover, and the discharge port is provided with a discharge valve. A material scattering mechanism is provided inside the vertical desorption tank. Heating components are used to heat the diatomaceous earth in the vertical desorption tank, causing the white oil and moisture to evaporate; A condenser is connected to a vertical desorption tank. Gas from the vertical desorption tank enters the condenser. A storage device is provided at the bottom of the condenser, and a vacuum pump is connected to one side of the condenser.

2. The diatomaceous earth white oil vertical desorption system as described in claim 1, characterized in that, The material dispersing mechanism includes: The cylinder is fixed inside the vertical desorption tank; A rotating shaft is rotatably mounted in a vertical desorption tank and passes through the cylinder; the rotating shaft is provided with helical blades. Multiple agitators are fixed on a rotating shaft on the lower side of the cylinder.

3. The diatomaceous earth white oil vertical desorption system as described in claim 2, characterized in that, A bulk material grid is provided on the outer wall of the top of the cylinder, and the bulk material grid is stepped.

4. The diatomaceous earth white oil vertical desorption system as described in claim 1, characterized in that, The heating assembly includes a steam generator, which has a water inlet and a steam outlet. The steam generator replenishes water through the water inlet and heats the water, and then discharges the steam through the steam outlet into the vertical desorption tank.

5. The diatomaceous earth white oil vertical desorption system as described in claim 4, characterized in that, The vertical desorption tank is equipped with multiple steam nozzles, which are connected to the outlet of a steam generator via pipes. The multiple steam nozzles are arranged in a ring on the inner wall of the vertical desorption tank.

6. The diatomaceous earth white oil vertical desorption system as described in claim 5, characterized in that, The steam nozzles are angled so that the steam forms a swirling flow inside the vertical desorption tank.

7. The diatomaceous earth white oil vertical desorption system as described in claim 1, characterized in that, The storage device includes a storage tank, which is located below and connected to the condenser. A level gauge is installed inside the storage tank, and a drain valve is installed at the bottom of the storage tank.

8. The diatomaceous earth white oil vertical desorption system as described in claim 7, characterized in that, The storage tank is equipped with a transparent observation section, which is used to observe the separation of white oil and water.

9. A vertical desorption system for diatomaceous earth white oil as described in claim 1, characterized in that, The condenser is equipped with a cooling coil, the two ends of which extend out of the condenser and are respectively connected to the inlet and outlet water pipes of an external circulating cooling device.

10. A vertical desorption system for diatomaceous earth white oil as described in claim 1, characterized in that, A vibratory hammer is installed on the bottom outer wall of the vertical desorption tank.

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