Chlorination reaction device for chlorinated paraffin production

Abstract

The utility model relates to a chlorination reaction device for chlorinated paraffin production in the field of chlorinated paraffin production, which is characterized in that a heat exchange interlayer is arranged outside a kettle body, hollow cavities are arranged in a stirring shaft and an anchor frame type stirrer, an air inlet is arranged at the top end of the stirring shaft and is connected with a chlorine supply pipe through a rotary joint, and a plurality of air outlets are arranged on the wall of the anchor frame type stirrer. The kettle cover is provided with a stirring motor, the side wall of the kettle body is connected with a paraffin feed port, the kettle bottom is provided with a discharge port, and a circulating discharge port in the side wall of the kettle body is connected with a material returning pump and a circulating cooler and is connected with a circulating feed port through a Venturi ejector; the kettle cover is provided with an ultraviolet lamp tube mounting opening, a tail gas exhaust opening and a circulating extraction opening connected to a negative pressure opening of the Venturi ejector, and the side wall of the middle part of the kettle body is provided with a plurality of transparent glass windows for mounting ultraviolet spotlights. The reaction kettle combines a thermal chlorination method and a photocatalytic chlorination method, so that the chlorination reaction is more thorough, the chlorine content in tail gas is reduced, the chlorine utilization rate is increased, and the chlorination reaction efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of chlorinated paraffin production, and particularly relates to a chlorination reaction device for chlorinated paraffin production. Background Art

[0002] Chlorinated paraffin is a chlorinated derivative of paraffin hydrocarbons. It has the advantages of low volatility, flame retardancy, good electrical insulation, and low price. It can be used as a flame retardant and auxiliary plasticizer for polyvinyl chloride and is widely used in the production of cable materials, flooring materials, hoses, artificial leather, rubber and other products. Chlorinated paraffin is mainly produced by chlorination reaction in a chlorination reactor using heavy liquid paraffin and chlorine as the main raw materials. The commonly used chlorination reactions of chlorinated paraffin are mainly thermal chlorination and photocatalytic chlorination. Existing chlorinated paraffin reactors mainly use the thermal chlorination method, which provides high temperature and high pressure reaction conditions for the liquid paraffin and chlorine in the reactor to promote the chlorination reaction. However, existing reactors still have problems such as slow chlorination reaction speed, insufficient temperature control response of the reactor, incomplete chlorination reaction, and high chlorine content in the reactor exhaust. Therefore, it is necessary to upgrade the chlorination reactors used in chlorinated paraffin production. Utility Model Content

[0003] In view of the above situation, the utility model provides a chlorination reaction device for producing chlorinated paraffin, which can make the chlorination reaction of chlorine gas and liquid paraffin proceed faster and more thoroughly.

[0004] In order to achieve the above objectives, the present invention adopts the following technical solutions:

[0005] A chlorination reaction device for producing chlorinated paraffin comprises a vertical reactor and a stirring shaft coaxially disposed vertically within the reactor. The reactor comprises a reactor body and a reactor cover detachably connected to the upper portion of the reactor body. The outer jacket of the reactor body is provided with a heat exchange interlayer. An anchor frame stirrer is connected to the lower outer portion of the stirring shaft. A hollow cavity in the form of a pipe network is provided through the interior of the stirring shaft and the anchor frame stirrer. The top of the stirring shaft rotatably extends above the reactor cover. An air inlet is provided at the top end of the stirring shaft. The air inlet is rotatably and sealably connected to a chlorine supply pipe via a rotary joint. A plurality of air outlets are provided on the side wall of the anchor frame stirrer. A stirring motor is fixedly disposed on one side above the reactor cover and is drivingly connected to the stirring shaft.

[0006] The top side wall of the kettle is connected to a feed port for introducing liquid paraffin, the bottom of the kettle is provided with a discharge port for discharging chlorinated paraffin, the discharge port is equipped with a discharge valve, the upper and lower parts of the side wall of the kettle are respectively provided with a circulation feed port and a circulation discharge port, a circulation cooler is provided on the side of the kettle, the bottom feed end of the circulation cooler is connected to the circulation discharge port via a return pump, and the top discharge end of the circulation cooler is connected to the circulation feed port via a Venturi ejector;

[0007] The kettle cover is provided with multiple lamp mounting ports for installing ultraviolet lamps and exhaust ports for discharging exhaust gas in the kettle, as well as a circulating air extraction port connected to the negative pressure port of the Venturi ejector. The sealing ring on the side wall in the middle of the kettle body is provided with multiple transparent glass windows, and an ultraviolet spotlight is installed on the outer side of each of the transparent glass windows.

[0008] Furthermore, a jacket inlet and a jacket outlet are provided on the side wall of the heat exchange interlayer, and an interlayer discharge port is also provided at the bottom of the heat exchange interlayer.

[0009] Furthermore, the circulating cooler is a shell-and-tube heat exchanger, and a cooling water inlet and a cooling water outlet are provided on the shell side wall of the circulating cooler for circulating and cooling the materials in the reactor.

[0010] Furthermore, the top of the kettle cover is provided with an observation port for installing an observation mirror for observing the chlorination reaction in the kettle.

[0011] Furthermore, the kettle cover is provided with a first installation port for installing a thermometer and a second installation port for installing a pressure gauge, which are used to detect the temperature and pressure in the kettle.

[0012] Furthermore, the stirring motor is a reduction motor vertically installed above the kettle cover through a connecting seat, a driving wheel is installed on the output shaft of the stirring motor, a driven wheel is installed on the stirring shaft, and a transmission belt is connected between the driving and driven wheels.

[0013] The present invention also includes other components that enable it to be used normally, which are all conventional means in the field. In addition, devices or components not limited in the present invention, such as: reactor, circulating cooler, rotary joint, ultraviolet lamp, ultraviolet spotlight and Venturi injector, etc., all adopt the existing technology in the field.

[0014] The beneficial effects of the utility model are as follows:

[0015] The utility model provides a chlorination reaction device for chlorinated paraffin production, which adopts a comprehensive chlorinated paraffin preparation method that combines a thermal chlorination method with a photocatalytic chlorination method, so that the chlorination reaction between chlorine and liquid paraffin is carried out more thoroughly, the chlorine content in the tail gas discharged from the reactor is reduced, the utilization rate of chlorine is improved, and the reaction speed of the chlorination reaction is increased, thereby improving the production efficiency of chlorinated paraffin. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Schematic diagram of the structure of the chlorination reaction device for producing chlorinated paraffin in the embodiment.

[0017] Figure 2 for Figure 1Schematic diagram of the top structure of the kettle cover along the AA direction.

[0018] Figure 3 for Figure 1 Schematic diagram of the cross-sectional structure along the BB direction. DETAILED DESCRIPTION

[0019] The technical solutions of the present invention will be clearly and completely described below in conjunction with specific embodiments. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments.

[0020] It should be noted that the terms "upper", "lower", "front", "back", "inside", "outside" and so on indicating directions or positional relationships are based on the drawings and are only for the convenience of description.

[0021] Example

[0022] like Figure 1-3 As shown, a chlorination reaction device for the production of chlorinated paraffin comprises a vertical reactor and a stirring shaft 3 coaxially arranged vertically in the reactor. The reactor consists of a reactor body 1 and a reactor cover 2 detachably connected to the upper part of the reactor body through a sealing flange structure. The outer jacket of the reactor body is provided with a heat exchange interlayer 5. The lower outer side of the stirring shaft is connected to an anchor frame stirrer 4. The interior of the stirring shaft and the anchor frame stirrer is provided with a pipe network-shaped hollow cavity 6. The reactor body, stirring shaft and anchor frame stirrer are all made of enamel material. The top of the stirrer is rotatably extended to the top of the kettle cover through the kettle top bearing seat 7. The top of the stirring shaft is provided with an air inlet 9, which is rotatably and sealedly connected to the chlorine supply pipe through a rotary joint 8. The chlorine supply pipe is provided with a chlorine inlet control valve, which can not only ensure that the reaction chlorine passes into the reactor through the hollow stirring shaft, but also ensure the rotation and stirring of the stirring shaft. A number of air outlet holes 10 are provided on the side wall of the anchor frame stirrer, and a stirring motor 11 is fixedly provided on one side above the kettle cover, and the stirring motor is connected to the stirring shaft through a belt drive assembly.

[0023] Furthermore, the rotary joint may be provided with a water inlet connected to cleaning water and a cleaning water valve 12, which can be used to spray and rinse the inner wall of the reactor.

[0024] A feed port 13 for introducing liquid paraffin is connected to the top side wall of the kettle body, and a paraffin feed control valve is provided on the feed port. A discharge port 14 for discharging chlorinated paraffin is provided at the bottom of the kettle body, and a discharge valve for discharging chlorinated paraffin is installed on the discharge port. A circulation feed port and a circulation discharge port are respectively provided on the upper and lower parts of the side wall of the kettle body. A circulation cooler 15 is provided on the side of the kettle body for circulating cooling of the material in the reactor. Because the chlorination reaction is an exothermic reaction, when the temperature in the kettle is too high, it is necessary to cool it down by circulating the material to take away the reaction heat. However, in the early stage of the chlorination reaction, it is still necessary to initially heat the material inside the reactor by passing hot water into the heat exchange interlayer to ensure the smooth start of the chlorination reaction. The bottom feed end of the circulation cooler is connected to the circulation discharge port through a return pump 16, and the top discharge end of the circulation cooler is connected to the circulation feed port through a Venturi ejector 17.

[0025] The kettle cover is evenly provided with four lamp installation ports 18 for installing ultraviolet lamps and an exhaust port 19 for discharging the exhaust gas in the kettle, as well as a circulating air extraction port 20 connected to the negative pressure port of the Venturi ejector. Three transparent glass windows are provided on the side wall of the middle part of the kettle body with a sealing ring at a 120° angle. The transparent glass lenses are installed in a flange sealing connection manner. An ultraviolet spotlight 21 is installed on the outer side of each of the transparent glass windows, which can irradiate the middle of the material in the kettle. Combined with the irradiation of the ultraviolet lamp on the top of the kettle, it can well promote the chlorination reaction rate of the liquid paraffin and chlorine in the kettle.

[0026] The side wall of the heat exchange interlayer is provided with a jacket inlet 22 and a jacket outlet 23, and the bottom of the heat exchange interlayer is also provided with an interlayer discharge port 24 for installing a steam trap.

[0027] The circulating cooler is a shell-and-tube heat exchanger, and the circulating material passes through the middle of the tube side of the shell-and-tube heat exchanger. A cooling water inlet 25 and a cooling water outlet 26 are provided on the shell side wall of the circulating cooler, which are used for circulating heat exchange and cooling of the material in the reactor to ensure a suitable reaction temperature in the reactor.

[0028] The top of the reactor cover is also provided with an observation port 28 for installing an observation mirror, which is convenient for observing the chlorination reaction in the reactor. The bottom of the reactor body is provided with supporting legs 27 for supporting the entire reactor.

[0029] The kettle cover is also provided with an installation port 1 29 for installing a thermometer and an installation port 2 30 for installing a pressure gauge, which are used to detect the temperature and pressure in the kettle. When the temperature is too high, the circulating material can be cooled by a circulating cooler. At the same time, cooling water can also be introduced into the heat exchange interlayer to cool the kettle to ensure the temperature and pressure of the chlorination reaction in the kettle.

[0030] The stirring motor is a reduction motor vertically installed above the kettle cover through a connecting seat 31. A driving wheel 32 is installed on the output shaft of the stirring motor, and a driven wheel 33 is installed on the stirring shaft. A transmission belt 34 is connected between the driving and driven wheels, which is used to drive the stirring shaft and the anchor frame agitator to stir the material in the kettle. At the same time, chlorine gas is introduced into the kettle in all directions with the anchor frame agitator for gas stirring, thereby further accelerating the chlorination reaction and improving the reaction speed and production efficiency of chlorinated paraffin.

[0031] The technical solution of the present invention is not limited to the above-mentioned specific embodiments. Without departing from the scope and spirit of the described embodiments, many modifications and changes are obvious to ordinary technicians in this technical field. Any technical deformation made within the spirit and principles of the present invention falls within the scope of protection of the present invention.

Claims

1. A chlorination reaction apparatus for producing chlorinated paraffin, comprising a vertical reactor and a stirring shaft coaxially and vertically arranged in the reactor, wherein the reactor comprises a reactor body and a reactor cover detachably connected to the upper portion of the reactor body, characterized in that: The outer jacket of the kettle body is provided with a heat exchange interlayer, an anchor frame agitator is connected to the outer side of the lower part of the stirring shaft, a pipe network-shaped hollow cavity is provided through the stirring shaft and the anchor frame agitator, the top of the stirring shaft is rotatably extended to the top of the kettle cover, an air inlet is provided at the top of the stirring shaft, the air inlet is rotatably and sealedly connected to the chlorine supply pipe through a rotary joint, a plurality of air outlet holes are opened on the side wall of the anchor frame agitator, a stirring motor is fixedly provided on one side above the kettle cover, and the stirring motor is transmission-connected to the stirring shaft; The top side wall of the kettle is connected to a feed port for introducing liquid paraffin, the bottom of the kettle is provided with a discharge port for discharging chlorinated paraffin, the discharge port is equipped with a discharge valve, the upper and lower parts of the side wall of the kettle are respectively provided with a circulation feed port and a circulation discharge port, a circulation cooler is provided on the side of the kettle, the bottom feed end of the circulation cooler is connected to the circulation discharge port via a return pump, and the top discharge end of the circulation cooler is connected to the circulation feed port via a Venturi ejector; The kettle cover is provided with multiple lamp mounting ports for installing ultraviolet lamps and exhaust ports for discharging exhaust gas in the kettle, as well as a circulating air extraction port connected to the negative pressure port of the Venturi ejector. The sealing ring on the side wall in the middle of the kettle body is provided with multiple transparent glass windows, and an ultraviolet spotlight is installed on the outer side of each of the transparent glass windows.

2. A chlorination reaction device for producing chlorinated paraffin according to claim 1, characterized in that: A jacket inlet and a jacket outlet are provided on the side wall of the heat exchange interlayer, and an interlayer discharge port is also provided at the bottom of the heat exchange interlayer.

3. A chlorination reaction device for producing chlorinated paraffin according to claim 1, characterized in that: The circulating cooler is a shell-and-tube heat exchanger, and a cooling water inlet and a cooling water outlet are provided on the shell side wall of the circulating cooler.

4. A chlorination reaction device for producing chlorinated paraffin according to claim 1, characterized in that: The kettle cover is also provided with a first installation port for installing a thermometer and a second installation port for installing a pressure gauge.

5. A chlorination reaction device for producing chlorinated paraffin according to claim 1, characterized in that: The stirring motor is a reduction motor vertically installed above the kettle cover through a connecting seat. A driving wheel is installed on the output shaft of the stirring motor, and a driven wheel is installed on the stirring shaft. A transmission belt is connected between the driving and driven wheels.

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