Improved device for efficient desorption of white oil in diatom ooze

Abstract

The utility model discloses an improved diatom ooze middle white oil high -efficient desorption device belongs to electrolytic aluminium technical field, and it is improved diatom ooze middle white oil high -efficient desorption device, including: desorption subassembly, desorption subassembly is used for desorption diatom ooze middle white oil, condensing subassembly, condensing subassembly with the discharge end intercommunication of desorption subassembly is used for carrying out condensation to the steam of desorption, separation subassembly, separation subassembly with the discharge end intercommunication of condensing subassembly is used for separating after the white oil of condensation, the utility model discloses adopt horizontal type's agitator jar to make the pressure between the diatom ooze of different positions in the jar same to make diatom ooze can evenly desorb white oil while improving desorption efficiency.

Description

Technical Field

[0001] This utility model relates to the field of electrolytic aluminum technology, specifically to an improved high-efficiency desorption device for white oil in diatomaceous earth. Background Technology

[0002] In the electrolytic aluminum industry, white oil is used as a lubricant and coolant when producing aluminum products. A large amount of white oil will remain on the aluminum products after using white oil. In order to produce qualified aluminum products, diatomaceous earth is needed to absorb the white oil on the surface of the aluminum products. However, excessive white oil residue is not allowed on the surface of the finished aluminum products. At the same time, in order to save 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] To achieve energy conservation and environmental protection, diatomaceous earth sludge that has adsorbed white oil is usually desorbed to recover the white oil. To improve the desorption efficiency, this process is generally carried out under negative pressure. Currently, most desorption devices are vertical devices. The diatomaceous earth sludge located at the bottom of the device is difficult to reach the optimal negative pressure state required for desorption, resulting in low overall desorption efficiency. It is difficult to completely desorb the white oil from the diatomaceous earth sludge. In addition, the pressure of diatomaceous earth sludge at different positions in the desorption device (such as the diatomaceous earth sludge at the center and the edge of the desorption device) is also different, resulting in uneven heating and desorption of diatomaceous earth sludge, which further affects the recovery effect of white oil.

[0004] To address the aforementioned problems, this invention provides an improved high-efficiency desorption device for white oil in diatomaceous earth. Utility Model Content

[0005] To address the aforementioned technical shortcomings, the purpose of this utility model is to provide an improved high-efficiency desorption device for white oil from diatomaceous earth. This device employs a horizontal mixing tank, which ensures that the pressure of the diatomaceous earth at different locations within the tank is uniform, thereby improving the desorption efficiency and enabling the diatomaceous earth to uniformly desorb the white oil.

[0006] To solve the above-mentioned technical problems, this utility model adopts the following technical solution: This utility model provides an improved high-efficiency desorption device for white oil in diatomaceous earth, comprising: A desorption assembly for desorbing white oil from diatomaceous earth; A condensing assembly, which is connected to the discharge end of the desorption assembly, is used to condense the desorbed vapor. A separation component, which is connected to the discharge end of the condensation component, is used to separate the condensed white oil.

[0007] Preferably, the desorption assembly includes: Steam generator; The stirring section is connected to the discharge end of the steam generator and is used to stir the diatomaceous earth containing white oil, so that the diatomaceous earth is always in a disturbed state.

[0008] Preferably, the stirring section includes: A mixing tank, wherein the axis of the mixing tank is parallel to the horizontal plane, and the upper side of the mixing tank is provided with a steam inlet and a desorption outlet, and an end cap is installed at one end of the mixing tank; A stirring unit is rotatably installed inside the stirring tank and driven by an external motor.

[0009] Preferably, the stirring unit includes: Two base rings are located at opposite ends inside the mixing tank and are coaxially rotatably installed inside the mixing tank. Multiple fixed shafts are fixedly installed between two base rings and are evenly distributed along the circumference of the base rings; Each fixed shaft has multiple blades fixedly installed on it.

[0010] Preferably, the multiple blades on the fixed shaft are spaced apart, and the multiple blades on two adjacent fixed shafts are staggered.

[0011] Preferably, the condensation assembly includes: A condenser tank, which is connected to an external circulating cooling water system; A flow pipe is fixedly installed inside the condenser, with one end connected to the desorption outlet on the mixing tank and the other end connected to the separation component.

[0012] Preferably, the section of the flow pipe located inside the condenser is spiral-shaped.

[0013] Preferably, the inner wall of the flow tube is provided with a plurality of protrusions.

[0014] Preferably, the flow pipe is connected to an external negative pressure device through an air extraction pipe fixedly installed on it, and a water-proof and air-permeable filter membrane is fixedly installed at the connection between the flow pipe and the air extraction pipe, inside the air extraction pipe.

[0015] Preferably, the separation component includes: The storage tank has its upper end connected to the discharge end of the condensation component and its lower end equipped with a valve. The side wall of the storage tank is equipped with an observation window, and a transparent sealing plate is fixedly installed inside the observation window.

[0016] The beneficial effects of this utility model are as follows: This invention achieves sufficient agitation and uniform heating of diatomaceous earth during the desorption process through the arrangement of a mixing tank, a base ring, a fixed shaft, and impellers. The horizontal placement of the mixing tank ensures that the diatomaceous earth in all positions within the tank is under the same negative pressure and temperature environment, thereby significantly improving the uniformity and thoroughness of white oil desorption. This avoids the problem of insufficient desorption of materials at the bottom or edges in traditional vertical devices. Furthermore, the fixed shaft and impellers provide all-around agitation of the diatomaceous earth without dead angles, keeping it in a constantly flowing and agitated state. This further enhances the contact efficiency between steam and diatomaceous earth, significantly improving the desorption rate and overall recovery rate of white oil.

[0017] This invention achieves stable negative pressure environment maintenance by setting an air extraction pipe on the flow pipe and installing a water-proof and breathable filter membrane at the connection point. At the same time, it effectively prevents the liquid white oil or water generated by condensation from being drawn away by the negative pressure equipment. This ensures that the entire desorption process is carried out efficiently under optimal negative pressure conditions, protects the negative pressure equipment, and improves the purity of white oil recovery.

[0018] This invention utilizes a spiral structure in the flow pipe with multiple protrusions on the inner wall, which significantly extends the flow path of desorbed steam during the condensation process and increases the heat exchange area considerably. At the same time, the protrusions enhance the turbulence effect of the steam, greatly improving the condensation efficiency, enabling the white oil steam to liquefy quickly, and reducing energy loss and white oil loss. Attached Figure Description

[0019] 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.

[0020] Figure 1 This is a flowchart illustrating the present invention.

[0021] Figure 2 This is a cross-sectional view of the mixing tank of this utility model.

[0022] Figure 3 This is a schematic diagram of the structure of the base ring, fixed shaft and blade of this utility model.

[0023] Figure 4 This is a schematic diagram of the structure of the condenser, flow pipe and extraction pipe of this utility model.

[0024] Figure 5 This is a schematic diagram showing the connection between the flow tube and the extraction tube of this utility model.

[0025] Figure 6 This is a partial cross-sectional view of the flow tube of this utility model.

[0026] Figure 7 This is a schematic diagram of the structure of the storage tank of this utility model.

[0027] Explanation of reference numerals in the attached figures: 1. Steam generator, 2. Stirring tank, 3. Base ring, 4. Fixed shaft, 5. Blade, 6. Condenser, 7. Flow pipe, 8. Extraction pipe, 9. Storage tank. Detailed Implementation

[0028] 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.

[0029] This invention provides an improved, highly efficient desorption device for white oil in diatomaceous earth, such as... Figures 1 to 7 As shown.

[0030] Example 1: An improved high-efficiency desorption device for white oil in diatomaceous earth mud includes a desorption component, a condensation component, and a separation component. The desorption component is used to desorb the white oil in the diatomaceous earth mud. The water vapor and white oil vapor generated during desorption enter the condensation component and are condensed into liquid. The condensed liquid white oil and water enter the separation component for separation. Finally, the separated white oil and water are discharged separately.

[0031] The desorption assembly includes a steam generator 1 and a stirring section, wherein the stirring section includes a stirring tank 2 and a stirring unit. The axis of the stirring tank 2 is parallel to the horizontal plane, and a steam inlet and a desorption outlet are respectively provided on its upper side. The horizontal arrangement of the stirring tank 2 ensures that the diatom mud is evenly distributed in the tank and is in the same negative pressure and temperature environment, avoiding the problems of insufficient negative pressure and uneven desorption of materials in the lower or edge parts of traditional vertical devices.

[0032] The stirring unit includes two base rings 3, multiple fixed shafts 4, and multiple blades 5. The two base rings 3 are located at both ends inside the stirring tank 2 and are coaxially rotatably installed inside the stirring tank 2. The multiple fixed shafts 4 are fixedly installed between the two base rings 3 and are evenly distributed along the circumference of the base rings 3. Multiple blades 5 are fixedly installed on each fixed shaft 4. The multiple blades 5 on the fixed shaft 4 are spaced apart, and the multiple blades 5 on two adjacent fixed shafts 4 are staggered. The stirring unit is rotatably installed inside the stirring tank 2 and is driven by an external motor. The stirring part is connected to the discharge end of the steam generator 1.

[0033] During operation, the motor drives the base ring 3 to rotate, and the base ring 3 synchronously drives the fixed shaft 4 and the blades 5 to rotate. The staggered blades 5 form an all-round, dead-angle-free stirring of the diatom mud in the mixing tank 2, so that the diatom mud is always in a state of flow disturbance. At the same time, the steam generated by the steam generator 1 is continuously introduced into the mixing tank 2. The horizontally set mixing tank 2 ensures that the diatom mud in all positions in the tank can be evenly contacted by steam, and there will be no local negative pressure deficiency. The steam and the disturbed diatom mud are fully mixed, which not only ensures that the diatom mud is heated evenly, but also enhances the rate of desorption of white oil from the diatom mud, and achieves a synergistic improvement in desorption uniformity and efficiency.

[0034] Example 2: The condensation assembly includes a condenser tank 6 and a flow pipe 7. The condenser tank 6 is connected to an external circulating cooling water system, enabling the continuous introduction of low-temperature cooling water and maintaining the cooling environment inside the tank. The flow pipe 7 is fixedly installed inside the condenser tank 6, with one end connected to the outlet of the agitator tank 2 and the other end connected to the separation assembly. A section of the flow pipe 7 located inside the condenser tank 6 is designed in a spiral shape, with multiple protrusions on its inner wall. When the white oil vapor desorbed by the desorption assembly enters the flow pipe 7 through the outlet of the agitator tank 2, the circulating cooling water in the condenser tank 6 immediately cools the wall of the flow pipe 7. The spiral structure significantly extends the flow path of the steam within the condenser tank 6, significantly increasing the contact time between the steam and the wall of the flow pipe 7. Compared to a straight pipe, the heat exchange time is increased several times. Meanwhile, multiple protrusions on the inner wall of the flow pipe 7 break the laminar flow of steam, causing the steam to form turbulence in the pipe. The turbulence effect increases the collision frequency between steam molecules and the pipe wall, making heat transfer more efficient. Together with the cooling environment continuously provided by the condenser 6, the white oil vapor can quickly release heat and liquefy, effectively reducing the volatilization loss of white oil during the condensation process and greatly improving the condensation efficiency.

[0035] An air extraction pipe 8 is fixedly installed on the flow pipe 7. The air extraction pipe 8 is connected to an external negative pressure device. A water-proof and air-permeable filter membrane is fixedly installed at the connection between the flow pipe 7 and the air extraction pipe 8 and inside the air extraction pipe 8.

[0036] During operation, the external negative pressure equipment continuously draws air through the suction pipe 8, maintaining the optimal negative pressure environment required for desorption inside the mixing tank 2 and the flow pipe 7. This negative pressure state can lower the boiling point of the white oil, making it easier for the white oil to desorb from the diatom mud into vapor. The water-proof and breathable filter membrane plays a key barrier role. It allows gas to pass through to maintain the negative pressure, while effectively preventing liquid white oil or water generated by condensation in the flow pipe 7 from entering the suction pipe 8. This avoids the loss of white oil caused by the negative pressure equipment drawing away liquid substances, and also protects the negative pressure equipment from liquid corrosion.

[0037] Water-proof and breathable filter membranes are existing technology and are now widely used, so this utility model will not elaborate on them. For example, water-proof and breathable filter membranes can be made of ePTFE membrane.

[0038] Example 3: The separation assembly includes a storage tank 9, the upper end of which is connected to the discharge end of the flow pipe 7, and a valve is provided at the lower end. An observation window is provided on its side wall, and a transparent sealing plate is fixedly installed inside the observation window.

[0039] The condensed white oil enters the storage tank 9 from the discharge end of the flow pipe 7. Due to the density difference between water and white oil, the condensed white oil and water will separate into layers after entering the storage tank 9. The liquid level and separation status can be monitored in real time through the observation window and sealing plate. The lower valve controls the water and white oil to be discharged separately, thereby working together to maintain a stable negative pressure, protect the equipment, and achieve the separation and recovery of white oil, improving the purity and economy of white oil recovery.

[0040] When discharging, turn off the steam generator 1, open the valve at the bottom of the storage tank 9, observe the dividing line between the white oil and water through the observation window, drain all the water, and then collect the remaining white oil in a container.

[0041] After the white oil in storage tank 9 is discharged, turn on steam generator 1 and continue to introduce saturated steam into mixing tank 2 so that the entire desorption system reaches the operating parameters and continues to desorb the white oil in the diatom mud. Use this method to repeatedly desorb the white oil in the diatom mud until all the white oil in the diatom mud is desorbed. Then take the diatom mud out of mixing tank 2 and put in new diatom mud containing white oil.

[0042] 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. An improved high-efficiency desorption device for white oil in diatomaceous earth, characterized in that, include: A desorption assembly for desorbing white oil from diatomaceous earth; A condensing assembly, which is connected to the discharge end of the desorption assembly, is used to condense the desorbed vapor. A separation component, which is connected to the discharge end of the condensation component, is used to separate the condensed white oil.

2. The improved high-efficiency desorption device for white oil in diatomaceous earth as described in claim 1, characterized in that, The desorption component includes: Steam generator (1); The stirring section is connected to the discharge end of the steam generator (1) and is used to stir the diatom mud containing white oil, so that the diatom mud is always in a disturbed state.

3. The improved high-efficiency desorption device for white oil in diatomaceous earth as described in claim 2, characterized in that, The stirring unit includes: A mixing tank (2) has its axis parallel to the horizontal plane. The upper side of the mixing tank (2) is provided with a steam inlet and a desorption outlet. One end of the mixing tank (2) is fitted with an end cap. The stirring unit is rotatably installed inside the stirring tank (2) and driven by an external motor.

4. The improved high-efficiency desorption device for white oil in diatomaceous earth as described in claim 3, characterized in that, The stirring unit includes: Two base rings (3) are located at both ends inside the mixing tank (2) and are coaxially rotatably installed inside the mixing tank (2); Multiple fixed shafts (4) are fixedly installed between two base rings (3) and are evenly distributed along the circumference of the base rings (3); Each fixed shaft (4) has multiple blades (5) fixedly installed on it.

5. An improved high-efficiency desorption device for white oil in diatomaceous earth as described in claim 4, characterized in that, The multiple blades on the fixed shaft (4) are distributed at intervals, and the multiple blades on two adjacent fixed shafts (4) are distributed alternately.

6. An improved high-efficiency desorption device for white oil in diatomaceous earth as described in claim 3, characterized in that, The condensation assembly includes: Condensation tank (6), which is connected to the external circulating cooling water system; The flow pipe (7) is fixedly installed inside the condenser (6), with one end connected to the desorption outlet on the stirring tank (2) and the other end connected to the separation component.

7. An improved high-efficiency desorption device for white oil in diatomaceous earth as described in claim 6, characterized in that, The section of the flow pipe (7) located inside the condenser (6) is spiral-shaped.

8. An improved high-efficiency desorption device for white oil in diatomaceous earth as described in claim 7, characterized in that, The inner wall of the flow tube (7) is provided with multiple protrusions.

9. An improved high-efficiency desorption device for white oil in diatomaceous earth as described in claim 6, characterized in that, The flow pipe (7) is connected to the external negative pressure equipment through the air extraction pipe (8) fixedly installed on it. At the connection between the flow pipe (7) and the air extraction pipe (8), and inside the air extraction pipe (8), a water-proof and air-permeable filter membrane is fixedly installed.

10. An improved high-efficiency desorption device for white oil in diatomaceous earth as described in claim 1, characterized in that, The separation component includes: The upper end of the storage tank (9) is connected to the discharge end of the condensation component, and the lower end is equipped with a valve. The side wall of the storage tank (9) is provided with an observation window, and a transparent sealing plate is fixedly installed inside the observation window.

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