Chlorinated paraffin production reaction device
By optimizing the structure of chlorine nozzles and adding a check device in the chlorinated paraffin production reaction device, the flash explosion problem caused by the reaction of chlorine and liquid wax is solved, and the safety of the chemical production process and the stability of product quality are improved.
Patent Information
- Application Number
- CN202421160378.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-05-27
- Publication Date
- 2025-02-25
- Estimated Expiration
- 2034-05-27
AI Technical Summary
During the production process of chlorinated paraffin, the violent reaction between chlorine and liquid wax can easily lead to flash explosions, especially in smaller spaces such as pipes. The heat conduction and heat dissipation conditions are limited, which can easily cause a rapid increase in temperature and achieve flash of alkanes Point or spontaneous ignition point.
A reaction device for chlorinated paraffin production is designed, including a reactor, a paraffin conveying pipe, a chlorine conveying pipe and a exhaust gas discharge pipe. A nozzle is set at the connection between the chlorinated gas conveying pipe and the reactor, and a check device with a trapezoidal cross-section is set in the nozzle to Optimize the nozzle runner structure and set limit rings in the chlorine gas delivery tube to limit movement of the check device. A heat exchanger circulating cooling and a cyclone separator are arranged in the reactor to control the temperature and separate the gas and liquid.
By optimizing the structure of chlorine nozzles and adding a check device, the uniform and stable injection of chlorine in the reaction system is achieved, which significantly improves the safety and product quality stability in the chemical production process, effectively avoids the risk of flash explosions, and improves the Product quality.
Smart Images
Figure CN222524451U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of chemical industry, in particular to a chlorinated paraffin production reaction device. Background Art
[0002] Chlorinated paraffin is an important class of chlorinated hydrocarbon compounds, mainly used in plasticizers, flame retardants, moisture-proof agents, metal processing lubricants and other fields. Its production process mainly involves the chlorination reaction of paraffin. The wax oil from the liquid wax storage tank is preheated and sent to the chlorination kettle and the chlorine gas introduced at the bottom. In the chlorination kettle, the chlorine molecules are decomposed into chlorine free radicals through thermal initiation and photoinitiation. The active chlorine free radicals attack the hydrogen atoms on the alkanes to produce hydrogen chloride and active alkane free radicals. The free radicals then react with chlorine molecules to produce chlorine free radicals and chlorinated straight-chain alkanes. The reaction kettle temperature is controlled at 85-95°C until a certain chlorine content is reached as the end point of the reaction.
[0003] In the production of chlorinated paraffins, the mixing and reaction of chlorine and alkanes are usually carried out in a closed reactor or pipeline. However, if chlorine and liquid wax (alkanes) react violently and release a lot of heat, flash explosions are likely to occur in a certain space, especially in a smaller space such as a pipeline. In a smaller space, such as a pipeline, due to limited heat conduction and heat dissipation conditions, heat is easy to accumulate, causing the temperature to rise rapidly, and then may reach the flash point or autoignition point of the alkane. Therefore, in the production process of chlorinated paraffins, a series of safety measures must be taken to prevent the problem of flash explosion caused by chlorine reflux. Utility Model Content
[0004] Aiming at the deficiencies of the prior art, the problem of flash explosion caused by chlorine gas reflux is solved.
[0005] The utility model provides a chlorinated paraffin production reaction device, comprising a reactor, a paraffin delivery pipe is arranged on the side of the reactor, a chlorine delivery pipe is arranged at the bottom of the reactor, a tail gas discharge pipe is arranged on the top of the reactor, a nozzle is arranged at the connection between the chlorine delivery pipe and the reactor, the nozzle is a bell mouth, and a non-return device with a trapezoidal cross section is arranged in the nozzle.
[0006] Furthermore, the reactor is provided with a heat exchanger for circulation cooling.
[0007] Furthermore, the heat exchanger is provided with a circulation pump for increasing circulation efficiency.
[0008] Furthermore, the tail gas discharge pipe is connected to a cyclone separator for separating liquid and gas.
[0009] Furthermore, an oil removal foam collector is arranged after the cyclone separator to remove gas foam and grease in the liquid.
[0010] As a preferred solution, a limiting ring is arranged in the chlorine gas delivery pipe to enable the non-return device to move within a limited range.
[0011] The method of using the utility model is:
[0012] The wax oil from the liquid wax storage tank is preheated and sent to the reactor. The chlorine gas introduced into the bottom of the reactor decomposes the chlorine molecules into chlorine free radicals through thermal initiation and photoinitiation in the reactor. The active chlorine free radicals attack the hydrogen atoms on the alkanes to produce hydrogen chloride and active alkane free radicals, which then react with the chlorine molecules to produce chlorine free radicals and chlorinated straight-chain alkanes. The reaction kettle temperature is controlled at 85-95℃, the reaction liquid level is controlled at 70-130cm, and the product output specific gravity is controlled between 1.22-1.27. In this way, a certain chlorine content is reached as the end point of the reaction.
[0013] The beneficial effects of the utility model are:
[0014] 1. The utility model aims to significantly improve the safety and product quality stability in the chemical production process by carefully optimizing the structure of the chlorine nozzle and optimizing the design of the nozzle flow channel structure by adding a check device. The uniform and stable injection of chlorine in the reaction system is achieved. This improvement effectively avoids the risk of flash explosion caused by excessive local concentration or excessive flow rate, and provides a safer and more stable environment for the entire production process.
[0015] 2. The utility model not only successfully solves the risk of flash explosion of chlorine gas and liquid wax under abnormal working conditions, but also effectively improves product quality and reduces the rate of production of unqualified products. This is of great significance for improving the safety production level of chemical companies, reducing production costs and enhancing market competitiveness. At the same time, the utility model also reflects the high attention to environmental protection and sustainable development, and provides strong support for green production in the chemical industry. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] In order to make the content of the utility model easier to understand, the utility model is further described in detail according to specific embodiments and in conjunction with the accompanying drawings.
[0017] Figure 1 A schematic structural diagram of the utility model.
[0018] Figure 2 A schematic structural diagram of a peg fixing plate of the present invention.
[0019] The reference numerals in the accompanying drawings are:
[0020] 1. Reactor; 11. Paraffin delivery pipe; 12. Chlorine delivery pipe; 13. Tail gas discharge pipe; 14. Nozzle; 15. Limiting ring; 2. Circulation pump; 3. Heat exchanger; 4. Cyclone separator; 5. Oil removal and foam collector; 6. Check device. DETAILED DESCRIPTION
[0021] To illustrate the features of the present invention, the present invention is further described below with reference to the accompanying drawings and embodiments.
[0022] Example:
[0023] See also Figure 1 and Figure 2 In view of the shortcomings of the prior art, this embodiment solves the problem that a large amount of carbon dioxide is emitted but cannot be utilized in a pulverized coal production system, and provides a chlorinated paraffin production reaction device, including a reactor 1, a paraffin delivery pipe 11 is arranged on the side of the reactor 1, a chlorine delivery pipe 12 is arranged at the bottom of the reactor 1, and a tail gas discharge pipe 13 is arranged on the top of the reactor 1. A nozzle 14 is arranged at the connection between the chlorine delivery pipe 12 and the reactor 1. The nozzle 14 is a bell mouth, and a non-return device 6 with a trapezoidal cross section is arranged in the nozzle 14. A limiting ring 15 is also arranged in the chlorine delivery pipe 12 to enable the non-return device 6 to move within a restricted range.
[0024] In order to ensure that the temperature of the reactor 1 remains stable, a heat exchanger 3 is provided in the reactor 1 for circulation cooling, and a circulation pump 2 for accelerating the circulation efficiency is provided in the heat exchanger 3, so that the temperature of the reactor 1 is maintained at 85-95°C required for the reaction.
[0025] In addition, in order to remove gas foam and grease, the exhaust pipe 13 is connected to a cyclone separator 4 for separating liquid and gas to separate gas and liquid, and an oil removal and foam collector 5 is arranged after the cyclone separator 4 to remove gas foam and grease in the liquid.
[0026] The method of using this embodiment is:
[0027] The wax oil from the liquid wax storage tank is preheated and sent to the reactor 1. The chlorine gas introduced into the bottom of the reactor 1 is thermally initiated and photo-initiated to decompose the chlorine molecules into chlorine free radicals in the reactor 1. The active chlorine free radicals attack the hydrogen atoms on the alkanes to produce hydrogen chloride and active alkane free radicals, which then react with the chlorine molecules to produce chlorine free radicals and chlorinated straight-chain alkanes. The reaction kettle temperature is controlled at 85-95°C, the reaction liquid level is controlled at 70-130cm, and the product output specific gravity is controlled between 1.22-1.27. In this way, a certain chlorine content is reached as the end point of the reaction.
[0028] The above embodiments and drawings are only used to illustrate the technical solution of the utility model, and are not intended to limit the utility model. The utility model is described in detail with reference to the preferred embodiments. It should be understood by ordinary technicians in this field that the changes, modifications, additions or substitutions made by ordinary technicians in this technical field within the essential scope of the utility model do not deviate from the purpose of the utility model and should also fall within the scope of protection of the claims of the utility model. Other related technical structures not fully disclosed in the utility model are prior art in the field.
Claims
1. A chlorinated paraffin production reaction device, comprising a reactor (1), a paraffin delivery pipe (11) being arranged on the side of the reactor (1), a chlorine delivery pipe (12) being arranged at the bottom of the reactor (1), and a tail gas discharge pipe (13) being arranged at the top of the reactor (1), characterized in that: A nozzle (14) is provided at the connection between the chlorine gas delivery pipe (12) and the reactor (1); the nozzle (14) is a bell mouth, and a non-return device (6) with a trapezoidal cross section is provided inside the nozzle (14).
2. The chlorinated paraffin production reaction device according to claim 1, characterized in that: The reactor (1) is provided with a heat exchanger (3) for circulation cooling.
3. The chlorinated paraffin production reaction device according to claim 2, characterized in that: The heat exchanger (3) is provided with a circulation pump (2) for increasing circulation efficiency.
4. The chlorinated paraffin production reaction device according to claim 1, characterized in that: The tail gas discharge pipe (13) is connected to a cyclone separator (4) for separating liquid and gas.
5. The chlorinated paraffin production reaction device according to claim 4, characterized in that: An oil removal foam collector (5) is arranged behind the cyclone separator (4) to remove gas foam and grease from the liquid.
6. The chlorinated paraffin production reaction device according to claim 1, characterized in that: A limiting ring (15) is arranged in the chlorine gas delivery pipe (12) so that the non-return device (6) moves within a limited range.