Tail gas tower with condensation and recovery functions

Abstract

The utility model relates to the field of chemical industry, and discloses a tail gas tower with condensation and recovery functions, which comprises a high-boiling-point removal tower and a cracking kettle, a separation pipe is fixedly arranged on one side of the upper end of the high-boiling-point removal tower, a separator is fixedly arranged at the output end of the separation pipe, a high-boiling-point substance outlet pipe is fixedly arranged at one of the output ends of the separator, and a high-boiling-point substance outlet pipe is fixedly arranged at the other end of the high-boiling-point removal tower. A low-boiling-point substance outlet pipe is fixedly arranged at the other output end of the separator, a catalyst containing box is fixedly arranged at the rear end of the cracking kettle, a filter box is fixedly arranged at the rear end of the catalyst containing box, a drawing plate is movably arranged at the inner end of the filter box, and a filter layer is fixedly arranged at the upper end of the drawing plate; according to the chlorosilane purification device, air pollution caused by the fact that harmful gas generated by chlorosilane is discharged into the atmosphere can be avoided, negative effects on the environment are reduced, and the ecological environment is protected.

Description

Technical Field

[0001] The utility model relates to the field of chemical industry, in particular to a tail gas tower with condensation and recovery function. Background Art

[0002] Chlorosilane is an organosilicon compound used to prepare silicon-containing polymers and coatings. A high-boiling tower is a device used in the chemical industry to fractionate liquid mixtures, usually to separate components with similar boiling points. The production process of chlorosilanes will produce gas emissions, including sulfur dioxide, nitrogen oxides, etc., which will pollute the environment. Chlorosilane itself will emit a pungent odor, which will affect the health of people around it.

[0003] However, conventional high-boiling towers do not have the function of gas condensation and recovery when treating chlorosilane. Without gas condensation and recovery functions, the high-value components in chlorosilane gas cannot be effectively recycled, resulting in waste of resources and economic losses. Since chlorosilane is harmful to the environment and human body, if it is not recycled, it will increase serious safety risks.

[0004] Therefore, those skilled in the art provide a tail gas tower with a condensation recovery function to solve the problems raised in the above background technology. Utility Model Content

[0005] The purpose of the utility model is to solve the shortcomings existing in the prior art, and a tail gas tower with a condensation recovery function is proposed. The harmful gases generated by chlorosilane are recovered by condensation. The condensation recovery can effectively recycle the high-value components in the chlorosilane gas, reduce waste and resource waste, improve production efficiency and economic benefits, and effectively avoid harmful gases such as chlorosilane being directly discharged into the atmosphere to cause air pollution, reduce the negative impact on the environment, and protect the ecological environment.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a tail gas tower with condensation recovery function, comprising a high-boiling tower and a cracking kettle, wherein a partition is fixedly arranged at the inner end of the high-boiling tower, a waste inlet is fixedly arranged at one side of the outer end of the high-boiling tower, a separation tube is fixedly arranged at one side of the upper end of the high-boiling tower, a separator is fixedly arranged at the output end of the separation tube, one of the output ends of the separator is fixedly arranged with a high-boiling outlet pipe, and the other output end of the separator is fixedly arranged with a low-boiling outlet pipe, a catalyst placement box is fixedly arranged at the rear end of the cracking kettle, a filter box is fixedly arranged at the rear end of the catalyst placement box, a pull-out plate is movably arranged at the inner end of the filter box, a filter layer is fixedly arranged at the upper end of the pull-out plate, a condenser is fixedly arranged at the rear end of the filter box, and a nitrogen-chlorosilane storage tank is fixedly arranged at the rear end of the condenser;

[0007] Through the above technical solution, when chlorosilane enters the high-boiling tower from the waste inlet, it will be separated into high-boiling products and low-boiling products by the separator first. The high-boiling products will enter the inner end of the cracking kettle through the connecting pipe, and after being stirred by the stirring paddle, they will be catalyzed by the catalyst placement box. Then the filter layer is made of activated carbon, and after being filtered, it will enter the condenser for condensation and finally be stored in the inner end of the nitrogen chlorosilane storage tank. When replacing the activated carbon, you only need to take out the pull-out plate and then replace the activated carbon filter layer at the upper end.

[0008] Furthermore, a connecting pipe is fixedly arranged at one side of the high boiling tower, and the other end of the connecting pipe is fixedly arranged at the front end of the cracking kettle;

[0009] Through the above technical solution, the setting of the connecting pipe allows high-boiling substances to flow smoothly into the cracking kettle, ensuring the continuous treatment process of chlorosilane and avoiding treatment interruption and impurity mixing.

[0010] Furthermore, the high-boiling substance outlet pipe is fixedly arranged on one side of the partition;

[0011] Through the above technical solution, the high-boiling material outlet pipe is fixed on one side of the partition and can be controlled on one side of the partition without mixing with the unseparated gas on the other side of the partition, thereby ensuring the purity and effectiveness of the treatment process.

[0012] Furthermore, a motor is fixedly arranged at the front end of the cracking kettle, and a stirring shaft is rotatably arranged at the output end of the motor;

[0013] Through the above technical solution, the chlorosilane in the cracking kettle can be uniformly stirred and mixed by using a motor to drive the rotation of the stirring shaft, which helps to improve the material mass transfer and heat transfer efficiency during the reaction process, promote the uniform reaction of chlorosilane, and ensure the stability and effect of the reaction process.

[0014] Furthermore, a stirring paddle is fixedly sleeved on the lower outer end of the stirring shaft, and the stirring paddle is rotatably arranged at the inner end of the cracking kettle;

[0015] Through the above technical solution, the rotation of the stirring paddle can make the cracking reaction materials evenly mixed at the inner end of the cracking kettle, ensure the uniformity of the chlorosilane composition, avoid the occurrence of local concentrations that are too high or too low, thereby improving the stability and consistency of the reaction.

[0016] Furthermore, the other end of the low-boiling-substance outlet pipe is fixedly connected to the catalyst placement box;

[0017] Through the above technical solution, low-boiling substances can be directly catalytically filtered and then enter the condenser for condensation, and finally stored in the nitrogen chlorosilane storage tank, which helps to prevent chlorosilane from being contaminated or volatilized and maintain the stability and quality of chlorosilane.

[0018] Furthermore, the condenser is fixedly arranged at the rear end of the high-boiling substance removal tower, and the condenser is fixedly arranged at the outer end of the low-boiling substance outlet pipe;

[0019] Through the above technical solution, the condenser is arranged at the rear end of the high boiling tower, which helps to condense the low boiling substances into liquid in a shorter time, reduce gas phase loss, and improve the yield. The condenser is at the outer end of the low boiling substance outlet pipe, which is convenient for operators to maintain and clean the condenser.

[0020] The utility model has the following beneficial effects:

[0021] 1. The utility model proposes a tail gas tower with condensation recovery function, which recovers harmful gases generated by chlorosilane by condensation. Condensation recovery can effectively recycle high-value components in chlorosilane gas, reduce waste and resource waste, improve production efficiency and economic benefits, and effectively avoid harmful gases such as chlorosilane being directly discharged into the atmosphere to cause air pollution, reduce negative impacts on the environment, and protect the ecological environment.

[0022] 2. The utility model proposes a tail gas tower with condensation recovery function. In the utility model, the harmful gas in chlorosilane is catalyzed by a catalyst, which can promote the decomposition and conversion reaction of chlorosilane gas, improve the recovery rate and reduce waste generation, and then pass through activated carbon filtration to further remove residual organic matter and impurities in the gas and improve the purity of the gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 The front axonometric view proposed for the utility model;

[0024] Figure 2 The rear axonometric view proposed for the utility model;

[0025] Figure 3 A cross-sectional view of the filter box proposed in the utility model;

[0026] Figure 4 A cross-sectional view of a separator is provided for the utility model;

[0027] Figure 5 An axonometric view of a filter box is provided for the utility model;

[0028] Figure 6 An axonometric diagram of a pull-out plate is provided for the utility model;

[0029] Figure 7 The utility model provides an axonometric view of the filter layer.

[0030] Legend:

[0031] 1. High boiling tower; 2. Cracking kettle; 3. Waste inlet; 4. Connecting pipe; 5. High boiling outlet pipe; 6. Separator; 7. Low boiling outlet pipe; 8. Separation tube; 9. Catalyst placement box; 10. Filter box; 11. Condenser; 12. Nitrogen chlorosilane storage tank; 13. Motor; 14. Stirring shaft; 15. Stirring paddle; 16. Pull-out plate; 17. Filter layer; 18. Partition. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0033] Reference Figure 1-7 , an embodiment provided by the utility model:

[0034] A tail gas tower with condensation recovery function comprises a high-boiling tower 1 and a cracking kettle 2, wherein a partition 18 is fixedly arranged at the inner end of the high-boiling tower 1, a waste material inlet 3 is fixedly arranged at one side of the outer end of the high-boiling tower 1, a separation tube 8 is fixedly arranged at one side of the upper end of the high-boiling tower 1, a separator 6 is fixedly arranged at the output end of the separation tube 8, a high-boiling material outlet pipe 5 is fixedly arranged at one of the output ends of the separator 6, and a low-boiling material outlet pipe 7 is fixedly arranged at the other output end of the separator 6, a catalyst placement box 9 is fixedly arranged at the rear end of the cracking kettle 2, a filter box 10 is fixedly arranged at the rear end of the catalyst placement box 9, a pull-out plate 16 is movably arranged at the inner end of the filter box 10, and a pull-out plate 16 is fixedly arranged at the upper end of the pull-out plate 16. A filter layer 17 is provided, a condenser 11 is fixedly provided at the rear end of the filter box 10, and a nitrogen chlorosilane storage tank 12 is fixedly provided at the rear end of the condenser 11. When chlorosilane enters the high-boiling tower 1 from the waste inlet 3, it will be preferentially separated into high-boiling products and low-boiling products through the separator 6. The high-boiling products will enter the inner end of the cracking kettle 2 through the connecting pipe 4, and after being stirred by the stirring paddle 15, they are catalyzed by the catalyst placement box 9. Then the filter layer 17 is made of activated carbon, and after being filtered, it enters the condenser 11 for condensation and is finally stored in the inner end of the nitrogen chlorosilane storage tank 12. When replacing the activated carbon, it is only necessary to take out the pull-out plate 16 and then replace the activated carbon filter layer 17 at the upper end.

[0035] The chlorosilane is separated into high-boiling products and low-boiling products by the separator 6, which helps to improve the purity and quality of the product and optimize the subsequent processing steps. The high-boiling products enter the cracking kettle 2 for stirring by the stirring paddle 15 and then the catalyst placement box 9 to remove the harmful gases inside and protect the health of the personnel. The activated carbon filtration of the filter layer 17 can effectively remove impurities and residual substances and improve the purity and cleanliness of the product.

[0036] A connecting pipe 4 is fixedly arranged on one side of the high-boiling tower 1, and the other end of the connecting pipe 4 is fixedly arranged at the front end of the cracking kettle 2. The setting of the connecting pipe 4 allows high-boiling substances to flow smoothly into the cracking kettle 2, ensuring that the treatment process of chlorosilane is carried out continuously, avoiding treatment interruption and impurities. The high-boiling substance outlet pipe 5 is fixedly arranged on one side of the partition 18, and the high-boiling substance outlet pipe 5 is fixed on one side of the partition 18, and can be controlled on one side of the partition 18, and is not mixed with the unseparated gas on the other side of the partition 18, ensuring the purity and effectiveness of the treatment process. A motor 13 is fixedly arranged at the front end of the cracking kettle 2, and a stirring shaft 14 is rotatably arranged at the output end of the motor 13. The rotation of the stirring shaft 14 driven by the motor 13 can make the chlorosilane in the cracking kettle 2 be uniformly stirred and mixed, which helps to improve the material mass transfer and heat transfer efficiency in the reaction process, promote the uniform reaction of chlorosilane, and ensure the stability and effect of the reaction process. The outer end of the lower side of the stirring shaft 14 is fixedly sleeved with a stirring paddle 15, which is rotatably arranged at the inner end of the cracking kettle 2. The rotation of the stirring paddle 15 can make the cracking reaction materials uniformly mixed at the inner end of the cracking kettle 2, ensure that the chlorosilane composition is uniform, and avoid the situation where the local concentration is too high or too low, thereby improving the stability and consistency of the reaction. The other end of the low-boiling-point outlet pipe 7 is fixedly connected to the catalyst placement box 9, and the low-boiling-point can be directly catalytically filtered and then enter the condenser 11 for condensation, and finally stored in the nitrogen chlorosilane storage tank 12, which helps to prevent the chlorosilane from being polluted or volatilized, and maintains the stability and quality of the chlorosilane. The condenser 11 is fixedly arranged at the rear end of the high-boiling tower 1, and the condenser 11 is fixedly arranged at the outer end of the low-boiling-point outlet pipe 7. The condenser 11 is arranged at the rear end of the high-boiling tower 1 to help condense the low-boiling-point into a liquid state in a shorter time, reduce gas phase loss, and improve yield. The condenser 11 is at the outer end of the low-boiling-point outlet pipe 7, which is conducive to the operator to maintain and clean the condenser 11.

[0037] In the separation process of chlorosilane, high boiling substances may contain some important target compounds or contain harmful substances in higher concentrations. Due to its high density and non-volatile characteristics, it is necessary to ensure uniform mixing by stirring and other methods, and then further catalyze or filter treatment to ensure the effect of the reaction and product quality. Low boiling substances generally refer to components with lower boiling points and higher volatility, which are more volatile and mixable at room temperature. Therefore, even without stirring, these low boiling substances are also easy to be condensed into liquid or solid forms by temperature control in the condenser 11.

[0038] Working principle: Chlorosilane enters the high-boiling tower 1 from the waste inlet 3, and will be separated into high-boiling products and low-boiling products by the separator 6 first. The high-boiling products will enter the inner end of the cracking kettle 2 through the connecting pipe 4, and after being stirred by the stirring paddle 15, they will be catalyzed by the catalyst placement box 9. Then the filter layer 17 is made of activated carbon, and after being filtered, it will enter the condenser 11 for condensation and finally be stored in the inner end of the nitrogen chlorosilane storage tank 12. When replacing the activated carbon, you only need to take out the pull-out plate 16 and then replace the activated carbon filter layer 17 at the upper end.

[0039] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A tail gas tower with condensation recovery function, comprising a high boiling point removal tower (1) and a cracking kettle (2), characterized in that: A partition plate (18) is fixedly provided at the inner end of the high boiling point removal tower (1), a waste material inlet (3) is fixedly provided at one side of the outer end of the high boiling point removal tower (1), a separation tube (8) is fixedly provided at one side of the upper end of the high boiling point removal tower (1), a separator (6) is fixedly provided at the output end of the separation tube (8), a high boiling point outlet pipe (5) is fixedly provided at one of the output ends of the separator (6), and a low boiling point outlet pipe (7) is fixedly provided at the other output end of the separator (6); A catalyst placement box (9) is fixedly arranged at the rear end of the cracking kettle (2), a filter box (10) is fixedly arranged at the rear end of the catalyst placement box (9), a pull-out plate (16) is movably arranged at the inner end of the filter box (10), a filter layer (17) is fixedly arranged at the upper end of the pull-out plate (16), a condenser (11) is fixedly arranged at the rear end of the filter box (10), and a nitrogen-chlorosilane storage tank (12) is fixedly arranged at the rear end of the condenser (11).

2. The tail gas tower with condensation recovery function according to claim 1, characterized in that: A connecting pipe (4) is fixedly arranged on one side of the high boiling point removal tower (1), and the other end of the connecting pipe (4) is fixedly arranged on the front end of the cracking kettle (2).

3. The tail gas tower with condensation recovery function according to claim 1, characterized in that: The high-boiling material outlet pipe (5) is fixedly arranged on one side of the partition plate (18).

4. The tail gas tower with condensation recovery function according to claim 1, characterized in that: A motor (13) is fixedly disposed at the front end of the cracking kettle (2), and a stirring shaft (14) is rotatably disposed at the output end of the motor (13).

5. The tail gas tower with condensation recovery function according to claim 4, characterized in that: A stirring paddle (15) is fixedly sleeved on the lower outer end of the stirring shaft (14), and the stirring paddle (15) is rotatably arranged at the inner end of the cracking kettle (2).

6. The tail gas tower with condensation recovery function according to claim 1, characterized in that: The other end of the low-boiling-substance outlet pipe (7) is fixedly connected to the catalyst placement box (9).

7. The tail gas tower with condensation recovery function according to claim 1, characterized in that: The condenser (11) is fixedly arranged at the rear end of the high-boiling substance removal tower (1), and the condenser (11) is fixedly arranged at the outer end of the low-boiling substance outlet pipe (7).

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