Vacuum drying gas phase recovery device and vacuum belt dryer

Abstract

The utility model belongs to the technical field of ethylene sulfate processing equipment, and particularly relates to a vacuum drying gas phase recovery device and a vacuum belt dryer, the vacuum drying gas phase recovery device comprises a vacuum pipeline and a reducing elbow, the vacuum pipeline comprises a first branch pipe, a second branch pipe and a third branch pipe which are communicated with one another, and the reducing elbow comprises a first reducing pipe and a second reducing pipe. The first reducer pipe is located in the first branch pipe, the second reducer pipe is located in the second branch pipe, the inlet end of the first reducer pipe is connected to the inner wall of the first branch pipe in a circumferential sealing mode, and a discharging port of the second reducer pipe extends downwards to enter the hopper. The upper opening of the hopper is connected with the lower opening of the second branch pipe, and the lower opening of the hopper is connected with a stock bin; and a gas flowing gap is formed between the second reducer pipe and the second branch pipe. The reducing elbow in the vacuum pipeline is used for cooling, energy consumption is reduced, the stock bin is of a detachable structure, vacuum is easy to replace and balance, overall vacuum cannot be affected, and due to continuous vacuum operation, the risk that materials in the pipeline are blocked is avoided.

Description

Technical Field

[0001] This utility model belongs to the technical field of processing equipment for vinyl sulfate, specifically a vacuum drying gas phase recovery device and a vacuum belt dryer. Background Technology

[0002] In existing technologies, the main drying methods for vinyl sulfate are drum drying and belt drying. Drum drying offers advantages such as high drying speed and high drying degree in a single pass, but its disadvantages include small single-pass throughput and low level of continuous operation. Belt drying is divided into vacuum belt drying and ordinary belt drying. Ordinary belt drying uses hot air as the heat source, which blows across the material to heat it and remove solvents and moisture. Vacuum belt drying generally uses hot water or thermal oil to exchange heat with the heating plates, thereby heating and drying the product. All of these drying methods can produce qualified products, and the purity of the vinyl sulfate obtained after drying is above 99.55%. However, because vinyl sulfate is prone to sublimation when heated, especially under vacuum heating, the sublimed material is usually removed by the vacuum system and then treated by water washing and absorption. Generally, the higher the heating temperature, the greater the loss, thus limiting the drying yield. Existing solutions for handling sublimed material mainly include water absorption and high-boiling-point solvent absorption. Vinyl sulfate is easily hydrolyzed after water absorption, resulting in significant losses. The purification process after recovering the high-boiling-point solvent is quite complex. Therefore, there is currently no good method to recover the sublimated material. Utility Model Content

[0003] To address the aforementioned technical problems, this invention provides a vacuum drying gas phase recovery device and a vacuum belt dryer, which can effectively recover sublimated vinyl sulfate without stopping the vacuum system, maintaining continuous operation of the vacuum drying system, and without introducing new impurities, thereby obtaining electronic-grade vinyl sulfate products.

[0004] The first objective of this invention is to provide a vacuum drying and gas phase recovery device, comprising a vacuum pipe and a reducing elbow disposed within the vacuum pipe, wherein:

[0005] The vacuum pipeline includes a first branch pipe, a second branch pipe, and a third branch pipe that are interconnected. The axis of the first branch pipe intersects the axis of the second branch pipe, and the second branch pipe is vertically arranged.

[0006] The reducing elbow includes a first reducing pipe and a second reducing pipe. The first reducing pipe is located inside the first branch pipe, and the second reducing pipe is located inside the second branch pipe. The first reducing pipe and the second reducing pipe have a tapered shape toward the air inlet direction away from the first branch pipe.

[0007] The inlet end of the first reducing pipe is circumferentially sealed to the inner wall of the air inlet of the first branch pipe, and the outlet end of the second reducing pipe extends downward into the hopper; the upper opening of the hopper is sealed to the lower opening of the second branch pipe, and a hopper is sealed to the upper opening of the lower opening of the hopper.

[0008] A gas flow gap is formed between the second reducer and the second branch pipe, and the gas flow gap is connected to the second reducer and the third branch pipe respectively.

[0009] Furthermore, a dustproof net is sealed between the upper opening of the hopper and the lower opening of the second branch pipe. The dustproof net has an opening in the middle, through which the outlet end of the second reducing pipe passes and extends downward into the hopper. The mesh size of the dustproof net is smaller than the outer diameter of the solid material.

[0010] Furthermore, the reducing elbow is formed by bending a tapered steel pipe, and the inlet end of the reducing elbow is welded to the inner wall of the air inlet of the first branch pipe.

[0011] Furthermore, the hopper is funnel-shaped, with a first quick connector connected to the lower opening of the hopper, and a second quick connector connected to the feed inlet of the hopper. The first and second quick connectors are connected in conjunction.

[0012] Furthermore, a first flange is welded to the air inlet of the first branch pipe, and a second flange is welded to the opening of the third branch pipe.

[0013] Furthermore, an observation hole is provided on the side wall of the silo, and a sight glass is sealed and connected to the observation hole.

[0014] Furthermore, a vacuum balancing valve is installed on the hopper.

[0015] Furthermore, the vacuum pipeline is a T-shaped pipeline, with the first branch pipe set horizontally and the second and third branches pipes set vertically, and the axis of the second branch pipe coincides with the axis of the third branch pipe.

[0016] Furthermore, the vacuum pipes, reducing elbows, hoppers, and silos are all made of stainless steel.

[0017] The second objective of this invention is to provide a vacuum belt dryer, including any of the above-mentioned vacuum drying gas phase recovery devices.

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0019] (1) The vacuum drying gas phase recovery device of this utility model includes a vacuum pipe and a reducing elbow. The vacuum pipe includes a first branch pipe, a second branch pipe and a third branch pipe. The reducing elbow includes a first reducing pipe and a second reducing pipe. The first reducing pipe is located inside the first branch pipe and the second reducing pipe is located inside the second branch pipe. When in use, one end of the first branch pipe is sealed and connected to the original vacuum pipe of the vacuum belt dryer, and one end of the third branch pipe is sealed and connected to the vacuum pipe of the vacuum system. The sublimated material enters the first branch pipe from the vacuum belt dryer and all of it enters the reducing elbow. After the sublimated material is cooled in the reducing elbow, it condenses on the inner wall and is blown down to the hopper by the high-speed wind flowing in the vacuum pipe. The low-boiling-point solvent is still in the gas phase because it has not been cooled to its boiling point and continues to be pumped away by the vacuum system. After the hopper is full, the hopper valve is closed and a new hopper is replaced. The hopper vacuum system is opened. After the vacuum system is balanced, the hopper valve is opened and the material is collected again.

[0020] (2) The vacuum drying gas phase recovery device of this utility model uses the reducing elbow in the vacuum pipeline to cool down, saving energy consumption. The hopper is a detachable structure that is easy to replace and balance the vacuum, which will not affect the overall vacuum. Furthermore, due to the continuous operation of the vacuum, there is no risk of blockage of the material in the pipe.

[0021] (3) A dustproof net is sealed between the upper opening of the hopper and the lower opening of the second branch pipe. The mesh size of the dustproof net is smaller than the outer diameter of the solid material, which can prevent the solid material after sublimation from rising into the vacuum system due to the gas material transport in the vacuum pipe. At the same time, the dustproof net also has a breathable function. Attached Figure Description

[0022] 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.

[0023] Figure 1 This is an overall structural diagram of the vacuum drying gas phase recovery device of this utility model;

[0024] Wherein: 1-vacuum pipe, 11-first branch pipe, 12-second branch pipe, 13-third branch pipe, 2-reducing elbow, 21-first reducing pipe, 22-second reducing pipe, 3-hopper, 4-silo, 5-dustproof net, 6-first flange, 7-second flange, 8-vacuum balance valve. Detailed Implementation

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

[0026] The following is in conjunction with the appendix Figure 1 The present invention will be described in detail with specific embodiments.

[0027] like Figure 1As shown, this utility model provides a vacuum drying gas phase recovery device, installed on the existing vacuum pipeline of a vacuum belt dryer, for collecting sublimated materials. In this application, the material to be collected is electronic-grade vinyl sulfate product. The vacuum drying gas phase recovery device of this application includes a vacuum pipeline 1 and a reducing elbow 2 installed within the vacuum pipeline 1. The diameter of the reducing elbow 2 gradually decreases from the inlet end to the outlet end, and the reducing elbow 2 can change the gas flow direction. In this application, the vacuum pipeline 1 includes a first branch pipe 11, a second branch pipe 12, and a third branch pipe 13 that are interconnected. The first branch pipe 11 is used to connect to the existing vacuum pipeline of the vacuum belt dryer; the second branch pipe 12 is used to connect to the material hopper 4 to collect materials; and the third branch pipe 13 is used to connect to the vacuum pipeline of the vacuum system to provide a vacuum environment for the vacuum pipeline in this application. The axis of the first branch pipe 11 intersects the axis of the second branch pipe 12, and the second branch pipe 12 is vertically arranged, meaning that the gas phase exits at the end of the first branch pipe 11 and then changes direction to enter the second branch pipe 12. The reducing elbow 2 includes... The first reducing pipe 21 and the second reducing pipe 22 are located inside the first branch pipe 11 and the second reducing pipe 22 are located inside the second branch pipe 12. The first reducing pipe 21 and the second reducing pipe 22 are tapered in shape towards the air inlet away from the first branch pipe 11. After the high-temperature gaseous material flows in the tapered reducing pipe bend 2, the temperature drops to the boiling point of the material and condenses on the pipe wall. The inlet end of the first reducing pipe 21 is circumferentially sealed to the inner wall of the air inlet of the first branch pipe 11, and the outlet end of the second reducing pipe 21 extends downward into the hopper 3. The upper opening of the hopper 3 is sealed to the lower opening of the second branch pipe 12, and the lower opening of the hopper 3 is sealed to a hopper 4. A gas flow gap is formed between the second reducing pipe 22 and the second branch pipe 12, and the gas flow gap is connected to the second reducing pipe 22 and the third branch pipe 13 respectively. In use, one end of the first branch pipe 11 is sealed and connected to the existing vacuum pipe of the vacuum belt dryer, and one end of the third branch pipe 13 is sealed and connected to the vacuum pipe of the vacuum system. The sublimated material enters the first branch pipe 11 from the vacuum belt dryer and all of it enters the reducing elbow 2. After cooling down in the reducing elbow 2, the sublimated material condenses on the pipe wall and is blown down to the hopper 4 by the high-speed airflow in the vacuum pipe. The low-boiling-point solvent, since it has not cooled down to its boiling point, is still in the gas phase and continues to be drawn away by the vacuum system through the gas flow gap. After the hopper 4 is full, the hopper valve is closed and a new hopper 4 is replaced. The hopper vacuum system is turned on, and after the vacuum system is balanced, the hopper valve is opened to continue collecting materials.

[0028] The vacuum drying gas phase recovery device of this application uses the reducing elbow 2 in the vacuum pipeline 1 for cooling, which saves energy consumption. The hopper 4 is a detachable structure that is easy to replace and balance the vacuum without affecting the overall vacuum. Furthermore, since the vacuum is continuously running, there is no risk of blockage of the material in the pipe.

[0029] Specifically, a dustproof net 5 is sealed between the upper opening of the hopper 3 and the lower opening of the second branch pipe 12. The dustproof net 5 has an opening in the middle, through which the outlet end of the second reducing pipe 22 passes and extends downward into the hopper 3. The mesh size of the dustproof net 5 is smaller than the outer diameter of the solid material. The dustproof net 5 can prevent the solid material after sublimation from being lifted into the vacuum system by the gas material transport in the vacuum pipe 1. At the same time, the dustproof net 5 also has a breathable function.

[0030] Specifically, the reducing elbow 2 is formed by bending a tapered steel pipe, and the inlet end of the reducing elbow 2 is welded to the inner wall of the first branch pipe 11.

[0031] Specifically, the hopper 3 is funnel-shaped, with a first quick connector connected to the lower opening of the hopper 3, and a second quick connector connected to the feed inlet of the hopper 4. The first and second quick connectors are connected in conjunction. By quickly connecting and disconnecting the first and second quick connectors, the purpose of quickly replacing the hopper 4 can be achieved. The funnel-shaped hopper 3 facilitates the material to slide down the inclined inner wall of the hopper 3 into the hopper 4.

[0032] Specifically, a first flange 6 is welded to the air inlet of the first branch pipe 11, and a second flange 7 is welded to the opening of the third branch pipe 13. The first branch pipe 11 is sealed and connected to the vacuum pipeline of the vacuum belt dryer through the first flange 6, and the third branch pipe 13 is sealed and connected to the vacuum pipeline of the vacuum system through the second flange 7.

[0033] Specifically, an observation hole is provided on the side wall of the silo 4, and a sight glass is sealed to the observation hole to facilitate personnel to observe whether the material in the silo 4 is full and whether the silo 4 needs to be replaced.

[0034] Specifically, a vacuum balance valve 8 is installed on the hopper 4. Its function is to draw the hopper 4 into a vacuum after the hopper 4 is connected to the hopper 3, so as to prevent the air in the hopper 4 from affecting the vacuum degree of the original system.

[0035] Preferably, the vacuum pipe 1 is a T-shaped pipe, with the first branch pipe 11 set horizontally, the second branch pipe 12 and the third branch pipe 13 set vertically, and the axis of the second branch pipe 12 coincides with the axis of the third branch pipe 13.

[0036] Preferably, the vacuum pipe 1, the reducing elbow 2, the hopper 3, and the silo 4 are all made of stainless steel.

[0037] This utility model also provides a vacuum belt dryer, including the vacuum drying gas phase recovery device of any one of the above. The vacuum belt dryer provided in this application adopts all the technical solutions of all embodiments of the above-mentioned vacuum drying gas phase recovery device, and therefore has at least all the beneficial effects brought about by the technical solutions of the above-mentioned vacuum drying gas phase recovery device embodiments, which will not be elaborated here.

[0038] The present invention has been further described above with reference to specific embodiments. However, it should be understood that the specific description herein should not be construed as limiting the substance and scope of the present invention. Various modifications made by those skilled in the art to the above embodiments after reading this specification are all within the scope of protection of the present invention.

Claims

1. A vacuum drying gas phase recovery device, characterized in that, Includes a vacuum pipe and a reducing elbow disposed within the vacuum pipe, wherein: The vacuum pipeline includes a first branch pipe, a second branch pipe, and a third branch pipe that are interconnected. The axis of the first branch pipe and the axis of the second branch pipe intersect, and the second branch pipe is vertically arranged. The reducing elbow includes a first reducing pipe and a second reducing pipe. The first reducing pipe is located inside the first branch pipe, and the second reducing pipe is located inside the second branch pipe. The first reducing pipe and the second reducing pipe have a tapered shape toward the air inlet direction away from the first branch pipe. The inlet end of the first reducing pipe is circumferentially sealed to the inner wall of the air inlet of the first branch pipe, and the outlet end of the second reducing pipe extends downward into the hopper; the upper opening of the hopper is sealed to the lower opening of the second branch pipe, and a hopper is sealed to the upper opening of the lower opening of the hopper. A gas flow gap is formed between the second reducing pipe and the second branch pipe, and the gas flow gap is connected to the second reducing pipe and the third branch pipe respectively.

2. The vacuum drying gas phase recovery device according to claim 1, characterized in that, A dustproof net is sealed between the upper opening of the hopper and the lower opening of the second branch pipe. The dustproof net has an opening in the middle. The outlet end of the second reducing pipe passes through the opening and extends downward into the hopper. The mesh size of the dustproof net is smaller than the outer diameter of the solid material.

3. The vacuum drying gas phase recovery device according to claim 1, characterized in that, The reducing elbow is formed by bending a tapered steel pipe, and the inlet end of the reducing elbow is welded to the inner wall of the air inlet of the first branch pipe.

4. The vacuum drying gas phase recovery device according to claim 1, characterized in that, The hopper is funnel-shaped, and a first quick connector is connected to the lower opening of the hopper. A second quick connector is connected to the feed inlet of the hopper. The first quick connector and the second quick connector are connected together.

5. The vacuum drying gas phase recovery device according to claim 1, characterized in that, A first flange is welded to the air inlet of the first branch pipe, and a second flange is welded to the opening of the third branch pipe.

6. The vacuum drying gas phase recovery device according to claim 1, characterized in that, An observation hole is provided on the side wall of the silo, and a sight glass is sealed and connected to the observation hole.

7. The vacuum drying gas phase recovery device according to claim 1, characterized in that, The silo is equipped with a vacuum balancing valve.

8. The vacuum drying gas phase recovery device according to claim 1, characterized in that, The vacuum pipeline is a T-shaped pipeline, with the first branch pipe set horizontally, and the second and third branch pipes set vertically, and the axis of the second branch pipe coincides with the axis of the third branch pipe.

9. The vacuum drying gas phase recovery device according to claim 1, characterized in that, The vacuum pipes, reducing elbows, hoppers, and silos are all made of stainless steel.

10. A vacuum belt dryer, characterized in that, Includes the vacuum drying gas phase recovery device according to any one of claims 1-9.

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