Sectional temperature control tower type chlorination device

Abstract

The utility model discloses a sectional temperature control tower type chlorination device which comprises a continuous feeding device, a temperature control packed tower and a gas-liquid separator, the continuous feeding device is arranged at the bottom of the temperature control packed tower, and the top of the temperature control packed tower is communicated with one side of the gas-liquid separator through a communicating pipe; a plurality of groups of jackets are arranged on the outer side of the temperature control packed tower, the temperature control packed tower comprises multiple stages of reaction tower sections, and packing support plates are arranged among the reaction tower sections. The tower type continuous chlorination reaction device is suitable for chlorination reaction with strict reaction temperature control, and tower type sectional temperature control continuous chlorination reaction is realized by adjusting the circulating medium temperature of the jacket layer of each tower section; the filler layer in the temperature control filler tower can effectively increase the contact area and time of gas and liquid phases, so that the mass transfer efficiency and the chlorine utilization rate are further improved, side reactions are reduced while excessive chlorination is avoided, the reaction selectivity is effectively improved, and the chlorination reaction yield is further increased.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical synthesis chlorination reaction, in particular to a sectional temperature-controlled tower-type chlorination device. Background Art

[0002] Chlorination reaction generally refers to the reaction of introducing chlorine element into a compound. In organic chemical reactions, chlorination reactions generally include substitution chlorination, addition chlorination and oxidative chlorination.

[0003] At present, batch kettle-type chlorination equipment or tower-type chlorination equipment is often used for chlorination reactions. When using batch chlorination equipment, the loss of chlorine gas during the chlorination process is relatively large, and the contact time between chlorine gas and the feed liquid is short. A part of the excessive chlorine gas will enter the absorption device with the tail gas, and the other part will participate in side reactions, resulting in over-chlorination and an increase in by-products. Although ordinary tower-type chlorination devices can avoid the above problems, they cannot stably control the temperature of each part in the tower. As chlorination progresses, the temperature distribution in the chlorination tower is not uniform enough, making it difficult to control the temperature and difficult to meet the requirements of chlorination reactions with higher temperature requirements. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a sectional temperature-controlled tower-type chlorination device to solve the above problems.

[0005] The utility model specifically adopts the following technical solutions to achieve the above purpose, including:

[0006] A continuous feeding device, a temperature-controlled packed tower and a gas-liquid separator. The continuous feeding device is arranged at the bottom of the temperature-controlled packed tower, and the top of the temperature-controlled packed tower is communicated with one side of the gas-liquid separator through a connecting pipe;

[0007] A plurality of jackets are arranged on the outer side of the temperature-controlled packed tower. The temperature-controlled packed tower includes multiple reaction tower sections, and a packing support plate is arranged between the reaction tower sections.

[0008] As a further description of the above technical solution, a gas inlet is arranged at the bottom of the continuous feeding device, and a material inlet is arranged at one side of the continuous feeding device.

[0009] As a further description of the above technical solution, the reaction tower sections include a first tower section, a second tower section and a third tower section, and jackets are respectively arranged outside the first tower section, the second tower section and the third tower section.

[0010] As a further description of the above technical solution, a packing layer is arranged inside the reaction tower section, and the packing support plate is arranged at the top and bottom of the packing layer.

[0011] As a further description of the above technical solution, a liquid outlet is provided at the top of the uppermost reaction tower section.

[0012] As a further description of the above technical solution, a pressure test port is provided in the middle of one side of each reaction tower section.

[0013] As a further description of the above technical solution, a temperature test port is provided in the middle of the other side of each reaction tower section.

[0014] As a further description of the above technical solution, an external circulating liquid inlet is provided at the bottom of one side of the jacket.

[0015] As a further description of the above technical solution, an external circulating liquid outlet is provided at the top of the other side of the jacket.

[0016] As a further description of the above technical solution, a material outlet is provided at the bottom of the gas-liquid separator, and a tail gas outlet is provided at the top of the gas-liquid separator.

[0017] The beneficial effects of the present utility model are as follows:

[0018] In the present utility model, the temperature-controlled packed tower includes multiple reaction tower sections, and a corresponding jacket is independently provided outside each tower section, which is suitable for the chlorination reaction that requires strict control of the reaction temperature. By adjusting the temperature of the circulating medium in the jacket layer of each tower section, the tower-type segmented temperature-controlled continuous chlorination reaction is realized; the packing layer inside the temperature-controlled packed tower can effectively increase the contact area and time of the gas-liquid two-phase, thereby improving the mass transfer efficiency and chlorine utilization rate, avoiding over-chlorination while reducing the occurrence of side reactions, effectively improving the reaction selectivity and thus the chlorination reaction yield.

[0019] To more clearly illustrate the structural features and functions of the present utility model, the present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments. Description of the Drawings

[0020] Figure 1 It is a schematic structural diagram of the segmented temperature-controlled tower-type chlorination device of the present utility model.

[0021] Reference Numerals:

[0022] 1. Continuous feeding device; 2. Temperature-controlled packed tower; 3. Gas-liquid separator; 4. Gas inlet; 5. Material inlet; 6. External circulating liquid inlet; 7. Temperature test port; 8. External circulating liquid outlet; 9. Pressure test port; 10. Packing layer; 11. Packing support plate; 12. Liquid outlet; 13. Connecting pipe; 14. Material outlet; 15. Tail gas outlet. Detailed Embodiments

[0023] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model.

[0024] As Figure 1 shown, in one embodiment, a segmented temperature-controlled tower-type chlorination device includes: a continuous feeding device 1, a temperature-controlled packed tower 2, and a gas-liquid separator 3. Among them, the continuous feeding device 1 is arranged at the bottom of the temperature-controlled packed tower 2, and the top of the temperature-controlled packed tower 2 is connected to one side of the gas-liquid separator 3 through a connecting pipe 13.

[0025] Please continue to refer to Figure 1 , a gas inlet 4 is arranged at the bottom of the continuous feeding device 1, and a material inlet 5 is arranged on one side, for transporting materials into the temperature-controlled packed tower 2.

[0026] Please continue to refer to Figure 1 , the temperature-controlled packed tower 2 includes multiple reaction tower sections, and the reaction tower sections include a first tower section, a second tower section, and a third tower section. A packing support plate 11 is arranged between each two reaction tower sections. Among them, a packing layer 10 is arranged inside the reaction tower section, and the packing support plate 11 is arranged at the top and bottom of the packing layer 10.

[0027] Furthermore, a liquid outlet 12 is arranged at the top of the uppermost reaction tower section, a pressure test port 9 is arranged in the middle of one side of each reaction tower section, and a temperature test port 7 is arranged in the middle of the other side of each reaction tower section. Independent jackets are respectively arranged outside the first tower section, the second tower section, and the third tower section. Among them, an external circulating liquid inlet 6 is arranged at the bottom of one side of the jacket. An external circulating liquid outlet 8 is arranged at the top of the other side of the jacket.

[0028] It should be specifically explained that after the circulating medium enters the jacket through the circulating liquid inlet, it flows out from the circulating liquid outlet, used to adjust the temperature of each reaction tower section, and the temperature and pressure are monitored in real time through the temperature test port 7 and the pressure test port 9. The jacket circulation systems between different tower sections can be used independently or in series. When specifically used, it can be adjusted and adapted according to the reaction conditions, so as to realize tower-type segmented temperature-controlled continuous chlorination reaction.

[0029] Please continue to refer to Figure 1 , a material outlet 14 is arranged at the bottom of the gas-liquid separator 3, and a tail gas outlet 15 is arranged at the top of the gas-liquid separator 3.

[0030] Working principle: During the experiment, the material enters the inside of the packed tower from the material inlet 5, and chlorine gas is introduced into the inside of the packed tower from the gas inlet 4. Subsequently, a chlorination reaction occurs in the segmented temperature-controlled packed tower 2. The liquid to be chlorinated passes through the first tower section, the second tower section, and the third tower section in sequence, and a gas-liquid two-phase reaction takes place inside the packed tower. After the chlorination reaction starts, the temperature of the external circulating liquid in the jacket layer can be adjusted according to the data of the temperature test port 7 of each tower section to control the reaction temperature inside the tower, reduce the generation of by-products, and improve the yield of the chlorination reaction product. Also, the feeding speeds of the liquid and chlorine gas are adjusted in a timely manner based on the data of the pressure test port 9 and the temperature test port 7 to control the process of the reaction inside the tower, extend the reaction residence time, enable the chlorine gas and the liquid in the tower to be fully contacted, improve the conversion rate of the chlorination reaction, save the consumption of chlorine gas, and ensure that the material flowing out for the first time is the qualified liquid. After the reaction, the material flows through the connecting pipe 13 from the liquid outlet 12 into the gas-liquid separator 3 to separate the required product liquid and the tail gas. The tail gas is discharged through the tail gas outlet 15 to the tail gas absorption system, and the reacted material flows out from the material outlet 14 and is collected.

[0031] Through the above technical solution, the present application realizes a continuous chlorination reaction with segmented temperature control by adjusting the temperature of the circulating medium in the jacket layer of each section inside the tower reactor, and can ensure stable temperature conditions throughout the reaction process. The packing layer 10 inside the temperature-controlled packed tower 2 can increase the contact area and contact time of the gas-liquid two-phase, effectively improving the mass transfer efficiency and the utilization rate of chlorine gas. It can not only avoid over-chlorination and reduce the occurrence of side reactions, but also effectively improve the selectivity of the reaction and the yield of the chlorination reaction.

[0032] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown herein, but will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A segmented temperature-controlled tower chlorination device, characterized in that: include: A continuous feeding device (1), a temperature-controlled packed tower (2) and a gas-liquid separator (3), wherein the continuous feeding device (1) is arranged at the bottom of the temperature-controlled packed tower (2), and the top of the temperature-controlled packed tower (2) is connected to one side of the gas-liquid separator (3) through a connecting pipe (13); A plurality of jackets are arranged outside the temperature-controlled packed tower (2), and the temperature-controlled packed tower (2) comprises a plurality of reaction tower sections, wherein packing support plates (11) are arranged between the reaction tower sections.

2. The segmented temperature-controlled tower chlorination device according to claim 1, characterized in that: The bottom of the continuous feeding device (1) is provided with a gas inlet (4), and the side of the continuous feeding device (1) is provided with a material inlet (5).

3. The segmented temperature-controlled tower chlorination device according to claim 1, characterized in that: The reaction tower section comprises a first tower section, a second tower section and a third tower section, and jackets are respectively arranged outside the first tower section, the second tower section and the third tower section.

4. The segmented temperature-controlled tower chlorination device according to claim 1, characterized in that: A packing layer (10) is arranged inside the reaction tower section, and the packing support plates (11) are arranged at the top and bottom of the packing layer (10).

5. The segmented temperature-controlled tower chlorination device according to claim 1, characterized in that: A liquid outlet (12) is provided at the top of the uppermost reaction tower section.

6. The segmented temperature-controlled tower chlorination device according to claim 1, characterized in that: A pressure test port (9) is provided in the middle of one side of each reaction tower section.

7. The segmented temperature-controlled tower chlorination device according to claim 1, characterized in that: A temperature testing port (7) is provided in the middle of the other side of each reaction tower section.

8. The segmented temperature-controlled tower chlorination device according to claim 1, characterized in that: An external circulating liquid inlet (6) is arranged at the bottom of one side of the jacket.

9. The segmented temperature-controlled tower chlorination device according to claim 1, characterized in that: An external circulating liquid outlet (8) is provided at the top of the other side of the jacket.

10. The segmented temperature-controlled tower chlorination device according to claim 1, characterized in that: The bottom of the gas-liquid separator (3) is provided with a material outlet (14), and the top of the gas-liquid separator (3) is provided with a tail gas outlet (15).

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