A decoloring tower liquid outlet structure

Abstract

This utility model provides a liquid outlet structure for a decolorization tower, belonging to the technical field of liquid outlet for decolorization towers. It includes a tower body with an outlet and a throttling valve on its outer wall. The output end of the throttling valve is equipped with a liquid outlet defoaming mechanism, which includes a first pipe and a second pipe. A defoaming component is installed between the first and second pipes. The defoaming component includes a rotating frame, with a mounting frame and a shaft bolted to both sides of the center of the rotating frame. An electric heating rod is installed inside the mounting frame, and multiple cutting parts are linearly arranged at equal intervals on the shaft. This utility model achieves a synergistic design of heating-promoted polymerization and stepped cutting during the liquid outlet process, effectively solving the problem of bubble retention in high-viscosity greases. Simultaneously, the gradual crushing avoids secondary emulsification of bubbles, significantly reducing the bubble content in the pipes, providing stable low-bubble materials for subsequent processes, reducing the risk of filter blockage, and improving product quality stability.

Description

Technical Field

[0001] This utility model mainly relates to the technical field of liquid discharge from a decolorization tower, specifically a liquid discharge structure for a decolorization tower. Background Technology

[0002] Decolorization towers are key equipment used in the oil refining process to remove impurities such as pigments and gums from oils. Their core function is to remove impurities through adsorption while using a vacuum environment to prevent oil oxidation and improve refining efficiency. The tower mainly consists of a tower body, a vacuum system, a heating system, a stirring system, and a feeding and discharging system. The discharge port of the feeding and discharging system is located at the bottom of the tower body and is connected to a filter through valves and pipes to discharge the adsorbed "oil-waste bleaching clay" mixture.

[0003] The workflow is as follows: The oil to be decolorized needs to undergo degumming and deacidification pretreatment, and be preheated to 60~80℃ (to reduce viscosity and facilitate flow). Then, the vacuum pump is started to draw the tower to the target vacuum level and remove air to prevent oil oxidation. The preheated oil is then fed into the tower through the feed inlet by the feed pump. At the same time, adsorbent (such as activated clay, adjusted according to pigment content) is added in proportion through the metering device. The stirring system is started to mix the oil and adsorbent evenly to form a suspension. The temperature inside the tower is raised to 80~120℃ by the heating system and the vacuum level is maintained, so that the adsorbent adsorbs pigments, residual gums, odor substances, etc. in the oil through the porous structure. After adsorption is completed, heating and stirring are stopped, the outlet valve is opened, and the "oil-waste bleaching clay" mixture is sent to the filtration equipment for the next process.

[0004] Currently, most liquid outlet structures consist of pipes and valves, primarily functioning to deliver the mixture from the outlet into the filtration equipment. During actual transport, air bubbles often appear at the outlet, causing cavitation. If these bubbles are not promptly removed, they will enter the filtration equipment (such as plate and frame filters or leaf filters) with the mixture, adhering to the filter cloth or membrane surface, occupying the filtration channels, and reducing the actual filtration area and the amount of filtrate per unit time (potentially decreasing by 30% to 50%). Furthermore, air bubbles trapped in the filter cake cause uneven cake texture and excessively high porosity, not only reducing the filtration efficiency but also... Low filter cake adsorption capacity (inability to effectively retain residual adsorbent) may also cause the filter cake to break during subsequent unloading, increasing cleaning difficulty. The generation of bubbles is mainly caused by the following factors: First, the pressure difference between the vacuum environment (negative pressure) inside the tower and external equipment (such as a filter, which may be slightly positive pressure or normal pressure) increases instantaneously. When the material flows through the outlet at high speed, the local pressure drops sharply, causing the dissolved air or water vapor in the oil to be released rapidly, forming a large number of bubbles. Second, the adsorbent itself is porous and contains air. Under the premise of insufficient mixing, the air trapped between the insufficiently dispersed adsorbent particles flows out with the material during discharge, generating bubbles. Utility Model Content

[0005] This utility model provides a solution that is significantly different from existing technologies, addressing the problem that existing solutions are too simplistic. Specifically, this utility model provides a decolorization tower outlet structure to solve the technical problem mentioned in the background that air bubbles easily appear at the outlet, which can then enter the filtration equipment with the mixture, affecting filtration efficiency.

[0006] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows: A decolorization tower liquid outlet structure includes a tower body, an outlet on the outer wall of the tower body, and a throttling valve on the outlet. The output end of the throttling valve is equipped with a liquid outlet defoaming mechanism. The defoaming mechanism includes a first pipe and a second pipe. Shaft seals are provided at the folded edges of the inner walls of both the first and second pipes. A defoaming assembly is provided between the two shaft seals. The defoaming assembly includes a rotating frame. Both sides of the rotating frame are connected to the inner walls of the corresponding shaft seals. A mounting frame and a shaft are bolted to both sides of the center of the rotating frame. An electric heating rod is installed inside the mounting frame, located on the axis of the inner cavity of the first pipe. Multiple cutting elements are linearly arranged at equal intervals on the shaft. The cutting elements rotate on the axis of the second pipe, and the size of the cutting elements gradually increases.

[0007] Furthermore, the first pipe is a gradually expanding pipe.

[0008] Furthermore, each of the cutting components includes a sleeve, which is fitted onto the corresponding position of the shaft, and each sleeve is provided with multiple cutting blades at equal intervals.

[0009] Furthermore, a cap is spirally connected to the opening at one end of the mounting bracket.

[0010] Furthermore, the liquid discharge defoaming mechanism also includes a motor, the output end of which is provided with a drive gear, which meshes with a gear ring, which is disposed on the outer wall of the rotating frame.

[0011] Furthermore, an exhaust valve is provided at the interface of the second pipe.

[0012] Furthermore, a vacuum unit is provided at the top of the tower body, and a feed inlet is provided on the side near the vacuum unit.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model, through the design of a first pipe, a second pipe, a shaft seal, a motor, a drive gear, a gear ring, a rotating frame, a mounting frame, an electric heating rod, a shaft, a sleeve, and cutting blades, achieves a gradual transition from narrow to wide pipes at the liquid outlet during the liquid discharge process. This avoids sudden expansion, reduces flow velocity, minimizes turbulence, and allows sufficient time for bubbles to rise and escape. Simultaneously, the built-in heating rod raises the temperature of the mixture inside the pipe. This reduces the viscosity of the grease to accelerate bubble rise and also lowers gas solubility by increasing the temperature, causing dissolved gases to quickly precipitate and aggregate into large, easily processed bubbles, laying the foundation for subsequent unified cutting and defoaming. The progressively larger rotating cutting blades along the pipeline create a stepped crushing mechanism. The bubbles are initially cut and dispersed, and then completely crushed as they flow with the material to the larger blades. Combined with the centrifugal force generated by the rotation, the gas and liquid are separated, which greatly improves the defoaming efficiency and effectively prevents the bubbles from entering the subsequent filtration system. This synergistic design of "heating-promoted polymerization + stepped cutting" not only solves the problem of bubble retention in high-viscosity greases, but also avoids secondary emulsification of bubbles through progressive crushing, significantly reducing the bubble content in the pipeline. The adaptability design of the rotating cutting blades to the pipeline direction reduces material flow resistance, ensuring efficient defoaming without affecting the discharge efficiency, guaranteeing the filtration efficiency of the next stage filtration equipment, reducing the probability of breakage during subsequent filter cake discharge, avoiding increased cleaning difficulty, and providing a stable low-bubble material for subsequent processes, reducing the risk of filter blockage and improving product quality stability.

[0014] The present invention will be explained in detail below with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the tower structure of this utility model; Figure 3 This is an exploded view of the liquid dispensing defoaming mechanism of this utility model; Figure 4 This is a schematic diagram of the connection of the defoaming component of this utility model.

[0016] In the diagram: 1. Tower body; 11. Feed inlet; 12. Liquid outlet; 13. Throttling valve; 14. Vacuum unit; 2. Liquid outlet defoaming mechanism; 21. First pipe; 22. Second pipe; 23. Shaft seal; 24. Motor; 25. Exhaust valve; 26. Drive gear; 27. Gear ring; 3. Defoaming assembly; 31. Rotating frame; 32. Mounting frame; 33. Electric heating rod; 34. Cap; 35. Shaft; 36. Cutting parts; 361. Sleeve; 362. Cutting blades. Detailed Implementation

[0017] To facilitate understanding of this utility model, a more comprehensive description of the utility model will be given below with reference to the accompanying drawings, which show several embodiments of the utility model. However, the utility model can be implemented in different forms and is not limited to the embodiments described in the text. On the contrary, these embodiments are provided to make the disclosure of the utility model more thorough and comprehensive.

[0018] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly associated with those skilled in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments and is not intended to limit the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0020] Please refer to the appendix carefully. Figure 1-4 A decolorization tower liquid outlet structure includes a tower body 1, an outlet 12 on the outer wall of the tower body 1, and a throttling valve 13 on the outlet 12. The output end of the throttling valve 13 is provided with an outlet defoaming mechanism 2. The outlet defoaming mechanism 2 includes a first pipe 21 and a second pipe 22. Shaft seals 23 are provided at the folded edges of the inner walls of the first pipe 21 and the second pipe 22. A defoaming component 3 is provided between the two shaft seals 23. The defoaming component 3 includes a rotating frame 31. The two sides of the rotating frame 31 are respectively connected to the inner walls of the corresponding shaft seals 23. The two sides of the center of the rotating frame 31 are respectively connected to the mounting frame 32 and the shaft 35 by bolts. An electric heating rod 33 is provided in the mounting frame 32. The electric heating rod 33 is located at the axial position of the inner cavity of the first pipe 21. Multiple cutting parts 36 are linearly arranged at equal intervals on the shaft 35. The cutting parts 36 are adapted to the pipeline conveying direction and rotate on the axis of the second pipe 22. The size of the cutting parts 36 gradually increases.

[0021] The above structure achieves a synergistic design of heating-induced polymerization and stepped cutting during the liquid discharge process, effectively solving the problem of air bubble retention in high-viscosity greases. This prevents a large number of air bubbles from entering the filtration equipment with the mixture, ensuring the filtration efficiency of the next stage filtration equipment, reducing the probability of breakage during subsequent filter cake discharge, and avoiding increased cleaning difficulty. At the same time, the gradual crushing also avoids secondary emulsification of air bubbles, significantly reducing the air bubble content in the pipeline. Furthermore, the adaptability design of the cutting blades 362 to the pipeline direction reduces material flow resistance, ensuring efficient defoaming while maintaining discharge efficiency. This provides a stable low-bubble material for subsequent processes, thereby reducing the risk of filter blockage and improving the stability of product quality, demonstrating certain practical value.

[0022] The specific operation is as follows: Open the throttle valve 13, and the "grease-waste clay" mixture enters the first pipe 21 from the outlet 12 and comes into contact with the electric heating rod 33 to heat the mixture, so as to reduce the viscosity of the grease and accelerate the rise of bubbles, so that the small bubbles in the mixture gather together to form large bubbles. Then, turn on the motor 24, and drive the rotating frame 31 to rotate through the interaction between the drive gear 26 and the gear ring 27. Then, the shaft 35 drives multiple cutting parts 36 of different sizes to rotate. Since the size of the cutting blades 362 increases along the direction of liquid flow, under the action of physical cutting and centrifugation, the gas is separated from the mixture and then discharged through the exhaust valve 25. Then the mixture can pass through the second pipe 22 to the next stage of the filtration equipment.

[0023] Please refer to the appendix carefully. Figure 2 and attached Figure 3 An exhaust valve 25 is provided at the interface of the second pipe 22. The exhaust valve 25 allows the separated gas to be discharged, that is, the gas located on the outer edge of the mixture (on the inner wall of the pipe). A vacuum unit 14 is provided at the top of the tower body 1. The vacuum unit 14 allows the air inside the tower to be discharged to prevent the oil from oxidizing inside the tower. An inlet 11 is provided near the side of the vacuum unit 14 for the addition of materials.

[0024] Please refer to the appendix carefully. Figure 4The first pipe 21 is a gradually expanding pipe, which allows the pipe at the outlet 12 to gradually widen from thin to thick, avoiding sudden expansion, reducing flow rate, reducing turbulence, and allowing bubbles sufficient time to rise and escape. Each cutting component 36 includes a sleeve 361, which is fitted onto the corresponding position of the shaft 35. Multiple cutting blades 362 are evenly spaced around each sleeve 361. The cutting blades 362 cut and separate the uniformly gathered large bubbles, thus separating the mixture. A cap 34 is spirally connected to the opening at one end of the mounting frame 32, which seals one end of the mounting frame 32. The liquid outlet defoaming mechanism 2 also includes a motor 24. The output end of the motor 24 is provided with a drive gear 26, which meshes with a gear ring 27. The gear ring 27 is set on the outer wall of the rotating frame 31. Through the mutual cooperation between the motor 24, the drive gear 26, and the gear ring 27, the driving force for the rotation of the rotating frame 31 is provided.

[0025] The present invention has been described above by way of example in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvement made by adopting the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution of the present invention to other occasions without modification, shall be within the protection scope of the present invention.

Claims

1. A decoloring tower liquid outlet structure, comprising a tower body (1), a liquid outlet (12) provided on the outer wall of the tower body (1), and a throttle valve (13) on the liquid outlet (12), wherein an output end of the throttle valve (13) is provided with a liquid outlet defoaming mechanism (2), characterized in that, The defoaming mechanism (2) includes a first pipe (21) and a second pipe (22). Shaft seals (23) are provided at the folded edges of the inner walls of the first pipe (21) and the second pipe (22). A defoaming component (3) is provided between the two shaft seals (23). The defoaming component (3) includes a rotating frame (31). The two sides of the rotating frame (31) are respectively connected to the inner walls of the corresponding shaft seals (23). The two sides of the center of the rotating frame (31) are respectively connected to the mounting frame (32) and the shaft (35) by bolts. An electric heating rod (33) is provided in the mounting frame (32). The electric heating rod (33) is located on the axis of the inner cavity of the first pipe (21). Multiple cutting parts (36) are linearly arranged at equal intervals on the shaft (35). The cutting parts (36) rotate on the axis of the second pipe (22), and the size of the cutting parts (36) gradually increases.

2. The decoloring tower outflow structure according to claim 1, characterized in that, The first pipe (21) is a gradually expanding pipe.

3. The decoloring tower outflow structure according to claim 1, characterized in that, Each of the cutting parts (36) includes a sleeve (361) which is fitted onto the corresponding position of the shaft (35). Each of the sleeves (361) is provided with a plurality of cutting blades (362) arranged at equal intervals.

4. The decoloring tower outflow structure according to claim 1, characterized in that, A cap (34) is screwed onto the opening at one end of the mounting bracket (32).

5. The decoloring tower outflow structure according to claim 1, characterized in that, The liquid discharge defoaming mechanism (2) also includes a motor (24), the output end of which is provided with a drive gear (26), the drive gear (26) is meshed with a toothed ring (27), and the toothed ring (27) is provided on the outer wall of the rotating frame (31).

6. The decoloring tower outflow structure according to claim 1, characterized in that, An exhaust valve (25) is provided at the interface of the second pipe (22).

7. The decoloring tower outflow structure according to claim 1, characterized in that, The top of the tower body (1) is provided with a vacuum unit (14), and a feed inlet (11) is provided on the side near the vacuum unit (14).

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