Device and method for preparing dichloropropanol through microchannel chlorination reaction

Abstract

The invention discloses a device and a method for preparing dichloropropanol through a microchannel chlorination reaction, and relates to the technical field of dichloropropanol. Comprising a bottom plate, mounting bases are mounted on the two sides of the outer wall of the top of the bottom plate, a main pipe is mounted on the inner walls of the tops of the mounting bases, and air pressure adjusting mechanisms are mounted in and above the main pipe. The reaction bin is arranged to provide a space for reaction of chlorine and propylene, the pressure in the reaction bin can be adjusted through the air pressure adjusting mechanism, and the temperature in the reaction bin can be adjusted through the temperature control mechanism. The internal environment of the reaction bin is adjusted to be suitable for the reaction of chlorine and propylene according to the combination of the actual environment and the suitable environment, so that the efficiency of the chlorination reaction is improved, heat released during the chlorination reaction can be counteracted by adjusting the temperature, and the influence of heat accumulation on the reaction bin and reaction products is reduced; the chlorine and the propylene can be fully mixed, so that the reaction efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of dichloropropanol, in particular to a device and a method for preparing dichloropropanol by microchannel chlorination reaction. Background Art

[0002] Dichloropropanol is a functionally diverse organic compound. It is an intermediate in the synthesis of a variety of compounds, especially in pharmaceutical and pesticide chemistry. It is used to synthesize important drugs and pesticides and their derivatives. It is widely used in chemical synthesis and industry and has important commercial value. When preparing dichloropropanol, chlorination reaction is often used.

[0003] Patent publication number CN108727159A discloses a method and device for preparing dichloropropane by microchannel chlorination reaction. The method comprises the following steps: uniformly mixing glycerol and adipic acid to form a mixed liquid, and then mixing the mixed liquid with hydrogen chloride in a pipeline before a pre-reaction tank, and then entering a pre-reaction tank with a solid acid catalyst attached to the inner wall for pre-reaction; then entering a microchannel reactor with a solid acid catalyst attached to the inner wall of a microchannel for chlorination reaction; then entering an atmospheric pressure tower for atmospheric distillation. The top of the atmospheric pressure tower contains low-boiling substances, which are subjected to analysis and stratification, and washed with water to obtain dichloropropane; the material at the bottom of the atmospheric pressure tower enters a vacuum tower to evaporate the dichloropropane. The invention uses a solid superacid attached to the inner wall of the pre-reaction tank and the inner wall of the microchannel of the microchannel reactor, thereby improving the reaction efficiency, reducing the difficulty of subsequent treatment, and reducing the operating cost.

[0004] The steps for preparing dichloropropanol in the above-mentioned and similar devices are relatively complicated, and it is not convenient to use in the scenario where dichloropropanol needs to be prepared quickly. When dichloropropanol is generated by the chlorination reaction, heat is usually released. There is a possibility of heat accumulation in the reaction container during the heat release process. If the reaction container accumulates heat, the temperature increase will usually accelerate the reaction rate, but uncontrolled temperature increase may cause the reactants to react too violently and produce unwanted products, thereby affecting the reaction results. At the same time, if the temperature is too high, the reaction container may be damaged. In the process of chlorination reaction, the environment inside the reaction container has an important influence on the reaction efficiency. If the reaction environment inside the reaction container cannot be adjusted, the efficiency of the chlorination reaction will be affected. Therefore, the present invention is proposed. Summary of the invention

[0005] The object of the present invention is to provide a device and method for preparing dichloropropanol by microchannel chlorination reaction, so as to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solution: a device for preparing dichloropropane by microchannel chlorination reaction, comprising a bottom plate, mounting seats are installed on both sides of the top outer wall of the bottom plate, a main pipe is installed on the top inner wall of the mounting seat, an air pressure regulating mechanism is installed inside and on the end of the main pipe, the middle part of the main pipe is separated from the two ends by the air pressure regulating mechanism to form a reaction chamber, the air pressure in the reaction chamber is regulated by the air pressure regulating mechanism, a temperature control mechanism for regulating the internal temperature of the reaction chamber is installed on the outer wall of the main pipe and the top of the mounting seat, a mixing mechanism for fully mixing the reactants in the reaction chamber is installed on the mounting seat and in the main pipe, an auxiliary mechanism for collecting dichloropropane is installed on the bottom plate, and a position regulating mechanism for adjusting the inclination angle of the bottom plate and the top component of the bottom plate is installed at the bottom of the bottom plate The temperature control mechanism includes a temperature control ring installed on the outer wall of the main pipe at a position corresponding to the position of the reaction chamber, a plurality of electric heating wires are installed between the inner walls at both ends of the temperature control ring, liquid storage rings are installed at both ends of the bottom outer wall of the mounting seat, a first delivery pipe and a second delivery pipe are installed between the liquid storage ring and the temperature control ring, liquid valves are installed on the outer walls of the first delivery pipe and the second delivery pipe, and a liquid circulation loop of the liquid storage ring and the temperature control ring is completed through the first delivery pipe and the second delivery pipe. An air pressure sensor and a temperature sensor are installed on the inner wall of the reaction chamber, and a heat dissipation component for dissipating heat from the liquid in the liquid storage ring is provided on the mounting seat. The reaction material is put into the reaction chamber, and the air pressure condition and temperature condition inside the reaction chamber are adjusted by the air pressure regulating mechanism and the temperature control mechanism. The reaction material is mixed by the mixing mechanism to fully mix and react to complete the preparation of dichloropropanol.

[0007] Furthermore, the mixing mechanism includes a main gear installed on the bottom of the inner wall at both ends of the mounting seat, a transmission rod is installed between the two main gears, a rotating motor is installed on the outer wall of the mounting seat, one end of the output shaft of the rotating motor is fixedly connected to the outer wall of one of the main gears, and sub-gears meshing with the main gears are installed on the top of the inner wall at both ends of the mounting seat. A connecting rod located in the main pipe is installed on the outer wall of the sub-gear, and a plug rod with adjustable leakage length is slidably inserted on the connecting rod, and a mixing fan facing the middle of the reaction chamber is installed on the outer wall of the plug rod.

[0008] Furthermore, the air pressure regulating mechanism includes a fixed plate fixedly connected to the inner wall of the main pipe, a connecting rod sealingly and rotatably connected to the middle part of the fixed plate, a slide plate sealingly and rotatably connected to the outer wall of the insertion rod, an adjusting spring is installed between the slide plate and the fixed plate, the area between the slide plate and the fixed plate forms a pressure regulating chamber, whipping fans are installed at both ends of the top outer wall of the bottom plate, an air inlet pipe connected to the whipping fan is installed on the outer wall of the main pipe corresponding to the pressure regulating chamber, and an air valve is installed on the outer wall of the air inlet pipe.

[0009] Furthermore, the heat dissipation assembly includes a plurality of transverse tubes transversely embedded in the liquid storage ring, a plurality of heat conducting plates are installed in the transverse tubes, the liquid storage ring is sleeved on the transmission rod, and a cooling fan facing the transverse tubes is installed on the transmission rod near the liquid storage ring.

[0010] Furthermore, the position adjustment mechanism includes a slot block installed on the outer wall of the bottom of the base plate, a rotating seat is hinged on the outer wall of the slot block, an adjustment motor connected to the outer wall of the slot block is installed on the outer wall of the rotating seat, and lifting components are installed on both sides of the outer walls at both ends of the rotating seat.

[0011] Furthermore, the auxiliary mechanism includes a collection box that is detachably plugged into the outer walls at both ends of the bottom plate, a concentration box is installed on the outer wall of the main pipe at the bottom of the regulating bin, a discharge pipe connected to the collection box is installed on the concentration box, and a discharge valve is installed on the outer wall of the discharge pipe.

[0012] Furthermore, a feed pipe is installed on the top outer wall of the main pipe in the middle of the reaction chamber, a storage box is installed on the outer wall of the feed pipe, and a feed valve is installed on the outer wall of the feed pipe.

[0013] A method for preparing dichloropropane by microchannel chlorination reaction uses the above-mentioned device for preparing dichloropropane by microchannel chlorination reaction, and the method comprises: presetting the preparation amount of dichloropropane, selecting appropriate amounts of chlorine and propylene based on the preparation amount of dichloropropane, passing the appropriate amounts of chlorine and propylene into a reaction chamber in a main pipe, adjusting the internal environment of the reaction chamber to a suitable condition by a gas pressure regulating mechanism in cooperation with a temperature controlling mechanism, fully mixing the chlorine and propylene by a mixing mechanism, reacting the chlorine and propylene under suitable conditions to obtain dichloropropane, and taking the dichloropropane out of the reaction chamber of the main pipe by an auxiliary mechanism in cooperation with a position regulating mechanism.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] The device and method for preparing dichloropropane by microchannel chlorination reaction provide space for chlorine and propylene to react by means of a set reaction chamber, the pressure inside the reaction chamber can be adjusted by means of a set air pressure regulating mechanism, and the temperature inside the reaction chamber can be adjusted by means of a set temperature control mechanism, which is conducive to adjusting the environment inside the reaction chamber to a suitable environment for chlorine and propylene to react according to the actual environment and a suitable environment, so as to improve the efficiency of the chlorination reaction; the heat released during the chlorination reaction can be offset by means of the adjustable temperature, and the influence of heat accumulation on the reaction chamber and the reaction product can be reduced; and the chlorine and propylene can be fully mixed by means of the set mixing mechanism, so as to improve the reaction efficiency.

[0016] At the same time, the rotation of the transmission rod in the mixing mechanism drives the cooling fan on the transmission rod to rotate, and the rotation of the cooling fan is used to blow air to cool the cross tube, and the heat of the liquid in the liquid storage ring is conducted out through the provided heat conducting plate, and the heat is dissipated by the cooling fan blowing air to dissipate the heat conducting plate. The groove block can be rotated by the provided adjusting motor, and then the inclination angle of the bottom plate and the parts on the outer wall of the top of the bottom plate can be adjusted. When discharging, the pressure can be reduced by inclining and cooperating with the air pressure regulating mechanism to carry out the discharging. By starting the lifting assembly, the bottom plate can be lifted up by the lifting assembly when the bottom plate is in a stable state, so that the bottom plate maintains a stable state, which is convenient for use.

[0017] At the same time, when the bottom plate is tilted and the air pressure regulating mechanism is used to reduce pressure, the discharge valve is opened, and the dichloropropanol falls into the collecting box under the action of gravity, and then enters the collecting box through the discharge pipe. At the same time, during cleaning, the cleaning liquid can be discharged through the feed pipe, and then the position regulating mechanism is started to move left and right to clean the reaction chamber, and then the cleaned liquid can be discharged through the collecting box. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 It is a schematic diagram of the overall bottom structure of the present invention;

[0020] Figure 3 It is a schematic diagram of the structure of a part of the mixing mechanism and a part of the air pressure regulating mechanism of the present invention;

[0021] Figure 4 It is a schematic cross-sectional structure diagram of the main pipe and the mounting seat of the present invention;

[0022] Figure 5 It is a schematic diagram of the structure of the regulating spring of the present invention;

[0023] Figure 6 It is a schematic diagram of the structure of the first delivery pipe and the second delivery pipe of the present invention;

[0024] Figure 7 It is a schematic diagram of the enlarged structure of point A of the present invention.

[0025] In the figure: 1. bottom plate; 2. mounting seat; 3. mixing mechanism; 301. main gear; 302. sub gear; 303. transmission rod; 304. connecting rod; 305. plug rod; 306. mixing fan; 4. main pipe; 5. air pressure regulating mechanism; 501. whipping fan; 502. air inlet pipe; 503. fixing plate; 504. regulating spring; 505. slide plate; 6. position regulating mechanism; 601. rotating seat; 602. lifting assembly; 603. slot block; 7. temperature control mechanism; 701. temperature control ring; 702. heating wire; 703. liquid storage ring; 704. cooling fan; 705. first conveying pipe; 706. second conveying pipe; 707. heat conducting sheet; 708. transverse pipe; 8. auxiliary mechanism; 801. collecting box; 802. feeding pipe; 803. centralizing box; 9. feeding pipe; 10. material storage box. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] In the process of producing dichloropropane, a reaction device is required. The reaction device provided by the present invention is specially used for the production operation of generating dichloropropane by chlorination reaction of chlorine and propylene. In the process of using the device for production operation, it is necessary to ensure in advance that the dosage of chlorine and propylene corresponds, and it is necessary to ensure that the liquid in the temperature control mechanism 7 of the device is sufficient, so as to ensure the normal operation of the device.

[0028] like Figure 1-Figure 7As shown, the present invention provides a technical solution: a device and method for preparing dichloropropane by microchannel chlorination reaction, comprising a bottom plate 1, mounting seats 2 are installed on both sides of the top outer wall of the bottom plate 1, a main pipe 4 is installed on the top inner wall of the mounting seat 2, an air pressure regulating mechanism 5 is installed inside and on the end of the main pipe 4, the middle part of the main pipe 4 is separated from the two ends by the air pressure regulating mechanism 5 to form a reaction chamber, and the air pressure in the reaction chamber is regulated by the air pressure regulating mechanism 5, a temperature control mechanism 7 for regulating the internal temperature of the reaction chamber is installed on the outer wall of the main pipe 4 and the top of the mounting seat 2, a mixing mechanism 3 for fully mixing the reactants in the reaction chamber is installed on the mounting seat 2 and in the main pipe 4, an auxiliary mechanism 8 for collecting dichloropropane is installed on the bottom plate 1, a position regulating mechanism 6 for adjusting the inclination angle of the bottom plate 1 and the top component of the bottom plate 1 is installed at the bottom of the bottom plate 1, and the temperature control mechanism 7 includes a temperature regulating mechanism 7 installed on the outer wall of the main pipe 4 A temperature control ring 701 is provided at a position corresponding to the position of the reaction bin, and a plurality of electric heating wires 702 are installed between the inner walls of both ends of the temperature control ring 701. Liquid storage rings 703 are installed at both ends of the outer wall of the bottom of the mounting seat 2. A first delivery pipe 705 and a second delivery pipe 706 are installed between the liquid storage ring 703 and the temperature control ring 701. Liquid valves are installed on the outer walls of the first delivery pipe 705 and the second delivery pipe 706. The liquid circulation loop of the liquid storage ring 703 and the temperature control ring 701 is completed through the first delivery pipe 705 and the second delivery pipe 706. An air pressure sensor and a temperature sensor are installed on the inner wall of the reaction bin. A heat dissipation component for dissipating heat from the liquid in the liquid storage ring 703 is provided on the mounting seat 2. The reaction materials are put into the reaction bin, and the air pressure conditions and temperature conditions inside the reaction bin are adjusted by the air pressure regulating mechanism 5 and the temperature control mechanism 7. The reaction materials are mixed by the mixing mechanism 3 to fully mix and react to complete the preparation of dichloropropanol.

[0029] It should be noted that, by setting up the reaction chamber, a space is provided for chlorine and propylene to react, the pressure inside the reaction chamber can be adjusted by the set air pressure regulating mechanism 5, and the temperature inside the reaction chamber can be adjusted by the set temperature control mechanism 7, which is conducive to adjusting the internal environment of the reaction chamber to a suitable environment according to the actual environment and the appropriate environment to improve the efficiency of the chlorination reaction. By adjusting the temperature, the heat released during the chlorination reaction can be offset, and the influence of heat accumulation on the reaction chamber and the reaction products can be reduced, which is convenient for use. Before use, coolant is added to the temperature control ring 701 and the liquid storage ring 703. During the temperature control process, the coolant in the temperature control ring 701 is heated by the heating wire 702 to increase the temperature. Heat is used to increase the temperature inside the reaction chamber. By opening the liquid valves on the first delivery pipe 705 and the second delivery pipe 706 and closing the electric heating wire 702, the cooling liquid can be cooled, thereby reducing the temperature inside the reaction chamber. The temperature and air pressure inside the reaction chamber can be understood through the temperature sensor and the air pressure sensor, which is convenient for use. The chlorine gas and propylene can be fully mixed through the provided mixing mechanism 3 to improve the reaction efficiency. The heat dissipation rate of the liquid in the liquid storage ring 703 can be increased through the provided heat dissipation component. The position adjustment mechanism 6 is provided to cooperate with the auxiliary mechanism 8, the inclination angle is adjusted through the position adjustment mechanism 6, and the reaction product dichloropropanol can be collected through the auxiliary mechanism 8.

[0030] like Figure 3 and Figure 4 As shown, the mixing mechanism 3 includes a main gear 301 installed on the bottom of the inner wall at both ends of the mounting seat 2, a transmission rod 303 is installed between the two main gears 301, a rotating motor is installed on the outer wall of the mounting seat 2, one end of the output shaft of the rotating motor is fixedly connected to the outer wall of one of the main gears 301, and sub-gears 302 meshing with the main gears 301 are installed on the top of the inner wall at both ends of the mounting seat 2. A connecting rod 304 located in the main pipe 4 is installed on the outer wall of the sub-gear 302, and an insertion rod 305 with an adjustable leakage length is slidably inserted on the connecting rod 304, and a mixing fan 306 facing the middle of the reaction chamber is installed on the outer wall of the insertion rod 305.

[0031] It should be noted that when the mixing mechanism 3 needs to be used, one of the main gears 301 is driven to rotate by starting the rotating motor, and the other main gear 301 is driven to rotate by the action of the transmission rod 303. The two sub-gears 302 are driven to rotate by the engagement of the sub-gear 302 with the main gear 301. The rotation of the sub-gear 302 drives the connecting rod 304, the plug rod 305 and the mixing fan 306 to rotate. The two mixing fans 306 rotate with each other, so that the chlorine and propylene in the reaction chamber can be fully mixed to improve the efficiency of the chlorination reaction of chlorine and propylene.

[0032] like Figure 3 and Figure 5 As shown, the air pressure regulating mechanism 5 includes a fixed plate 503 fixedly connected to the inner wall of the main pipe 4, a connecting rod 304 is sealingly rotatably connected to the middle part of the fixed plate 503, a slide plate 505 is sealingly rotatably connected to the outer wall of the insertion rod 305, an adjusting spring 504 is installed between the slide plate 505 and the fixed plate 503, the area between the slide plate 505 and the fixed plate 503 forms a pressure regulating chamber, whipping fans 501 are installed at both ends of the top outer wall of the bottom plate 1, an air inlet pipe 502 connected to the whipping fan 501 is installed on the outer wall of the main pipe 4 corresponding to the pressure regulating chamber, and an air valve is installed on the outer wall of the air inlet pipe 502.

[0033] It should be noted that when it is necessary to use the air pressure regulating mechanism 5, by starting the whipping fan 501, when pressurization is required, air is sucked from the outside and discharged into the air inlet pipe 502, and when decompression is required, air is sucked from the air inlet pipe 502 and discharged to the outside environment. By adjusting the action of the spring 504 and coordinating the suction and exhaust of the whipping fan 501, the pressure inside the reaction chamber can be adjusted. By using the air valve provided on the air inlet pipe 502, whether the air inlet pipe 502 is enabled can be controlled, which is convenient for use. The sealed rotation can be achieved by installing a sealed bearing or a bearing with a sealing gasket.

[0034] like Figure 4 and Figure 7 As shown, the heat dissipation assembly includes a plurality of transverse tubes 708 transversely embedded in a liquid storage ring 703, a plurality of heat conducting plates 707 are installed in the transverse tubes 708, the liquid storage ring 703 is sleeved on the transmission rod 303, and a cooling fan 704 facing the transverse tubes 708 is installed on the transmission rod 303 near the liquid storage ring 703.

[0035] It should be noted that when the heat dissipation component is needed, the rotation of the transmission rod 303 drives the cooling fan 704 on the transmission rod 303 to rotate, and the rotation of the cooling fan 704 is used to blow air to cool the cross tube 708. The heat of the liquid in the liquid storage ring 703 is conducted out through the provided heat conducting plate 707, and the cooling fan 704 blows air to dissipate the heat for the heat conducting plate 707.

[0036] like Figure 2 As shown, the position adjustment mechanism 6 includes a slot block 603 installed on the outer wall of the bottom of the base plate 1, a rotating seat 601 is hinged on the outer wall of the slot block 603, an adjustment motor connected to the outer wall of the slot block 603 is installed on the outer wall of the rotating seat 601, and lifting components 602 are installed on both sides of the outer walls at both ends of the rotating seat 601.

[0037] It should be noted that when it is necessary to use the position adjustment mechanism 6, the groove block 603 can be rotated by starting the set adjustment motor, and then the inclination angle of the base plate 1 and the parts on the top outer wall of the base plate 1 can be adjusted, which is beneficial for discharging by reducing the pressure by tilting and cooperating with the air pressure adjustment mechanism 5. By starting the lifting component 602, when the base plate 1 is in a stable state, the lifting component 602 can be used to lift the base plate 1, so that the base plate 1 maintains a stable state, which is convenient for use.

[0038] like Figure 2 As shown, the auxiliary mechanism 8 includes a collecting box 801 that is detachably plugged into the outer walls at both ends of the base plate 1, a concentrating box 803 is installed on the outer wall of the main pipe 4 at the bottom of the regulating bin, a discharge pipe 802 that is connected to the collecting box 801 is installed on the concentrating box 803, and a discharge valve is installed on the outer wall of the discharge pipe 802.

[0039] It should be noted that when the auxiliary mechanism 8 is needed, when the bottom plate 1 is tilted and the air pressure regulating mechanism 5 is cooperated to reduce the pressure, the discharge valve is opened, and the dichloropropanol falls into the collecting box 803 under the action of gravity, and then enters the collecting box 801 through the discharge pipe 802. At the same time, when cleaning, the cleaning liquid can be discharged through the feed pipe 9, and then the position adjustment mechanism 6 is started to move left and right to clean the reaction chamber, and then the cleaned liquid can be discharged through the collecting box 803.

[0040] like Figure 2 As shown, a feed pipe 9 is installed on the top outer wall of the main pipe 4 at the middle of the reaction chamber, a storage box 10 is installed on the outer wall of the feed pipe 9, and a feed valve is installed on the outer wall of the feed pipe 9.

[0041] It should be noted that chlorine and propylene can be fed into the reaction chamber through the provided feed pipe 9, chlorine and propylene can be pre-stored through the provided storage box 10, and the feed rate of the gas can be controlled through the provided feed valve.

[0042] A method for preparing dichloropropane by microchannel chlorination reaction, the method comprising: presetting the preparation amount of dichloropropane, selecting appropriate amounts of chlorine and propylene based on the preparation amount of dichloropropane, passing the appropriate amounts of chlorine and propylene into a reaction chamber in a main pipe 4, adjusting the internal environment of the reaction chamber to a suitable condition by a gas pressure regulating mechanism 5 in cooperation with a temperature controlling mechanism 7, fully mixing the chlorine and propylene by a mixing mechanism 3, obtaining dichloropropane by reacting the chlorine and propylene under suitable conditions, and taking the dichloropropane out of the reaction chamber of the main pipe 4 by an auxiliary mechanism 8 in cooperation with a position regulating mechanism 6.

[0043] It should be noted that the amount of dichloropropanol prepared is determined according to actual use requirements. The temperature environment is usually recommended to be between 20°C and 60°C for reaction. Lower temperatures (such as 20°C-30°C) help to improve selectivity and reduce the formation of by-products, while higher temperatures (such as 50°C-60°C) may increase the reaction rate, but it needs to be carefully controlled to avoid the decomposition of dichloropropanol. The reaction is usually carried out at normal pressure, but in some cases, the reaction rate and yield of the gas can be increased by moderately increasing the pressure (such as 1-2 atmospheres). The optimal ratio is usually between 1.2:1 and 3:1 of chlorine and propylene. A proper excess of chlorine can increase the conversion rate of the reaction and reduce the amount of unreacted propylene.

[0044] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is limited by the attached embodiments and their equivalents.

Claims

1. A device for preparing dichloropropanol by microchannel chlorination reaction, comprising a bottom plate (1), characterized in that: Mounting seats (2) are installed on both sides of the top outer wall of the bottom plate (1), a main pipe (4) is installed on the top inner wall of the mounting seat (2), and a gas pressure regulating mechanism (5) is installed inside and on the end of the main pipe (4). The middle part of the main pipe (4) is separated from the two ends by the gas pressure regulating mechanism (5) to form a reaction chamber, and the gas pressure in the reaction chamber is regulated by the gas pressure regulating mechanism (5). A temperature control mechanism (7) for regulating the temperature inside the reaction chamber is installed on the outer wall of the main pipe (4) and the top of the mounting seat (2). A mixing mechanism (3) for fully mixing the reactants in the reaction chamber is installed on the mounting seat (2) and in the main pipe (4). An auxiliary mechanism (8) for collecting dichloropropanol is installed on the bottom plate (1). A position regulating mechanism (6) for adjusting the inclination angle of the bottom plate (1) and the top component of the bottom plate (1) is installed at the bottom of the bottom plate (1). The temperature control mechanism (7) comprises a temperature control ring (7) installed on the outer wall of the main pipe (4) at a position corresponding to the position of the reaction chamber. 701), a plurality of electric heating wires (702) are installed between the inner walls at both ends of the temperature control ring (701), liquid storage rings (703) are installed at both ends of the outer wall of the bottom of the mounting seat (2), a first delivery pipe (705) and a second delivery pipe (706) are installed between the liquid storage ring (703) and the temperature control ring (701), and liquid valves are installed on the outer walls of the first delivery pipe (705) and the second delivery pipe (706), and liquid is completely delivered through the first delivery pipe (705) and the second delivery pipe (706). A liquid circulation loop is formed by forming a liquid storage ring (703) and a temperature control ring (701); a pressure sensor and a temperature sensor are installed on the inner wall of the reaction chamber; a heat dissipation component for dissipating the liquid in the liquid storage ring (703) is provided on the mounting seat (2); reaction materials are put into the reaction chamber, the pressure and temperature conditions inside the reaction chamber are adjusted by the pressure regulating mechanism (5) and the temperature control mechanism (7); the reaction materials are mixed by the mixing mechanism (3) to fully mix and react to complete the preparation of dichloropropane.

2. The device for preparing dichloropropane by microchannel chlorination reaction according to claim 1, characterized in that: The mixing mechanism (3) comprises a main gear (301) mounted on the bottom of the inner wall at both ends of the mounting seat (2), a transmission rod (303) is mounted between the two main gears (301), a rotating motor is mounted on the outer wall of the mounting seat (2), one end of the output shaft of the rotating motor is fixedly connected to the outer wall of one of the main gears (301), and a sub-gear (302) meshing with the main gear (301) is mounted on the top of the inner wall at both ends of the mounting seat (2), a connecting rod (304) located in the main pipe (4) is mounted on the outer wall of the sub-gear (302), a plug rod (305) with an adjustable leakage length is slidably inserted on the connecting rod (304), and a mixing fan (306) facing the middle of the reaction chamber is mounted on the outer wall of the plug rod (305).

3. The device for preparing dichloropropane by microchannel chlorination reaction according to claim 1, characterized in that: The air pressure regulating mechanism (5) comprises a fixed plate (503) fixedly connected to the inner wall of the main pipe (4); a connecting rod (304) is sealingly rotatably connected to the middle part of the fixed plate (503); a slide plate (505) is sealingly rotatably connected to the outer wall of the insertion rod (305); an adjusting spring (504) is installed between the slide plate (505) and the fixed plate (503); a pressure regulating chamber is formed in the area between the slide plate (505) and the fixed plate (503); a whipping fan (501) is installed at both ends of the top outer wall of the bottom plate (1); an air inlet pipe (502) connected to the whipping fan (501) is installed on the outer wall of the main pipe (4) at a position corresponding to the pressure regulating chamber; and an air valve is installed on the outer wall of the air inlet pipe (502).

4. The device for preparing dichloropropane by microchannel chlorination reaction according to claim 1, characterized in that: The heat dissipation assembly comprises a plurality of transverse tubes (708) transversely embedded in a liquid storage ring (703), a plurality of heat conducting plates (707) are installed in the transverse tubes (708), the liquid storage ring (703) is sleeved on a transmission rod (303), and a cooling fan (704) facing the transverse tubes (708) is installed on the transmission rod (303) near the liquid storage ring (703).

5. The device for preparing dichloropropane by microchannel chlorination reaction according to claim 1, characterized in that: The position adjustment mechanism (6) comprises a slot block (603) mounted on the outer wall at the bottom of the base plate (1); a rotating seat (601) is hingedly connected to the outer wall of the slot block (603); an adjustment motor connected to the outer wall of the rotating seat (601) is mounted on the outer wall of the slot block (603); and lifting components (602) are mounted on both sides of the outer walls at both ends of the rotating seat (601).

6. The device for preparing dichloropropane by microchannel chlorination reaction according to claim 1, characterized in that: The auxiliary mechanism (8) comprises a collection box (801) detachably plugged into the outer walls at both ends of the bottom plate (1); a concentration box (803) is installed on the outer wall of the main pipe (4) at the bottom of the regulating bin; a discharge pipe (802) communicating with the collection box (801) is installed on the concentration box (803); and a discharge valve is installed on the outer wall of the discharge pipe (802).

7. The device for preparing dichloropropanol by microchannel chlorination reaction according to claim 1, characterized in that: A feed pipe (9) is installed on the top outer wall of the main pipe (4) at the middle of the reaction chamber, a material storage box (10) is installed on the outer wall of the feed pipe (9), and a feed valve is installed on the outer wall of the feed pipe (9).

8. A method for preparing dichloropropanol by microchannel chlorination reaction, characterized in that: A device for preparing dichloropropane by a microchannel chlorination reaction according to any one of claims 1 to 7, the method comprising: presetting a dichloropropane preparation amount, selecting appropriate amounts of chlorine and propylene based on the dichloropropane preparation amount, passing the appropriate amounts of chlorine and propylene into a reaction chamber in a main pipe (4), adjusting the internal environment of the reaction chamber to a suitable condition by a gas pressure regulating mechanism (5) in cooperation with a temperature controlling mechanism (7), fully mixing the chlorine and propylene by a mixing mechanism (3), obtaining dichloropropane by reacting the chlorine and propylene under suitable conditions, and taking the dichloropropane out of the reaction chamber of the main pipe (4) by an auxiliary mechanism (8) in cooperation with a position regulating mechanism (6).

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