Fenclorim chlorination system

Abstract

The utility model relates to a fenclorim chlorination system, and relates to the technical field of chlorination equipment. The device comprises a reaction kettle, a transfer bin is further arranged on one side of the reaction kettle, a feeding pipe is further arranged on the lower portion of the transfer bin, the two ends of the feeding pipe are communicated with the reaction kettle and the transfer bin respectively, and a powder diaphragm pump and a one-way valve are further arranged on the feeding pipe. The powder diaphragm pump is used for introducing powdery solids in the transfer bin into the reaction kettle, and the circulation direction of the one-way valve is the direction from the transfer bin to the reaction kettle. The 2-phenyl-4, 6-dihydroxypyrimidine reaction kettle has the following effects that the powder diaphragm pump can continuously or intermittently introduce 2-phenyl-4, 6-dihydroxypyrimidine powder solid into the reaction kettle in batches, so that the reaction in the reaction kettle is continuously carried out, and the one-way valve enables the circulation direction of the feeding pipe to be the single direction from the transfer bin to the reaction kettle; the probability that hydrogen chloride gas overflows through the feeding pipe is reduced, the stability and safety of reaction in the reaction kettle are guaranteed, and the preparation efficiency of fenclorim is guaranteed.

Description

Technical Field

[0001] The present application relates to the technical field of chlorination equipment, and in particular to a chlorpyrifos chlorination system. Background Art

[0002] With the continuous development of social economy and the increasing level of science and technology, my country's agriculture is also booming. As a pyrimidine herbicide safener, fenthiocarb is usually used in combination with pretilachlor to expand the scope of application of pretilachlor. It is widely used in the prevention and control of plants such as barnyard grass, sedge, and Cyperus difformis in rice fields. It is particularly effective in preventing sedge, and plays an important role in agriculture.

[0003] In the prior art, there is a chlorination reactor for fenthiocarb, which includes a reactor body, a feeding port is provided on the top of the reactor body, and a feeding pipe is provided on the feeding port, and the feeding pipe is used to connect the material source. When in use, the phosphorus oxychloride in the reactor body begins to heat up, and when the temperature in the reactor body rises to a suitable temperature, the relevant personnel then pass 2-phenyl-4,6-dihydroxypyrimidine powdered solid into the feeding pipe, so that the phosphorus oxychloride reacts with 2-phenyl-4,6-dihydroxypyrimidine, thereby preparing fenthiocarb.

[0004] Regarding the above-mentioned related technologies, since in the prior art, relevant personnel pass 2-phenyl-4,6-dihydroxypyrimidine powdered solid into the feeding tube, this makes it difficult to control the amount of 2-phenyl-4,6-dihydroxypyrimidine in the reactor, which easily leads to insufficient 2-phenyl-4,6-dihydroxypyrimidine in the reactor, resulting in the difficulty of continuous reaction in the reactor. At the same time, the hydrogen chloride gas generated by the reaction in the reactor is likely to overflow from the feeding tube outside the reactor, making it difficult to ensure the stability and safety of the reaction in the reactor, and it is difficult to ensure the efficiency of the preparation of chlorpyrifos. Utility Model Content

[0005] In order to enable the reaction in the reactor to proceed continuously, the present application provides a chlorpyrifos chlorination system.

[0006] The present application provides a chlorpyrifos chlorination system, which adopts the following technical solution:

[0007] A chlorpyrifos chlorination system comprises a reactor, characterized in that: a transfer silo is further provided on one side of the reactor, a feeding pipe is further provided at the lower part of the transfer silo, both ends of the feeding pipe are respectively connected with the reactor and the transfer silo, a powder diaphragm pump and a one-way valve are further provided on the feeding pipe, the powder diaphragm pump is used to pass the powdered solid in the transfer silo into the reactor, and the flow direction of the one-way valve is from the transfer silo to the reactor.

[0008] By adopting the above technical scheme, compared with the prior art in which relevant personnel successively pass 2-phenyl-4,6-dihydroxypyrimidine powdered solid into the reactor, the present application sets a transfer silo, a feeding pipe and a powder diaphragm pump, so that the powder diaphragm pump can continuously or intermittently pass the 2-phenyl-4,6-dihydroxypyrimidine powdered solid in the transfer silo into the reactor in batches, thereby ensuring that there is sufficient 2-phenyl-4,6-dihydroxypyrimidine powdered solid in the reactor, so that the reaction in the reactor can be carried out continuously, thereby increasing the stability and safety of the reaction in the reactor, and ensuring the preparation efficiency of chlorpyrifos. At the same time, the presence of the one-way valve makes the flow direction between the transfer silo and the reactor a single direction, that is, the direction from the transfer silo to the reactor, thereby reducing the probability of the gas generated in the reactor overflowing to the outside of the reactor through the feeding pipe, thereby effectively reducing the probability of accidental leakage of hydrogen chloride in the reactor, and ensuring the safety of the chlorpyrifos chlorination system of the present application.

[0009] Preferably, the reactor is further provided with a stirring mechanism, which comprises a driving member and a stirring frame, the stirring frame is located in the reactor, the top end of the stirring frame is rotatably connected to the reactor, and the driving member is used to drive the stirring frame to rotate.

[0010] By adopting the above technical solution, the stirring mechanism is set so that the stirring frame can be rotated under the drive of the driving member, thereby stirring the materials in the reaction kettle, thereby improving the mixing effect of phosphorus oxychloride and 2-phenyl-4,6-dihydroxypyrimidine, and then the phosphorus oxychloride and 2-phenyl-4,6-dihydroxypyrimidine in the reaction kettle can fully react, thereby increasing the preparation efficiency of chlorpyrifos.

[0011] Preferably, the stirring frame is further provided with a plurality of stirring blade groups, each of the stirring blade groups comprises a plurality of stirring blades, the plurality of stirring blade groups are arranged along the axis of the stirring frame, and the plurality of stirring blade groups are staggered.

[0012] By adopting the above technical scheme, the setting of several stirring blade groups can increase the stirring effect of the materials in the reactor, thereby improving the mixing effect of phosphorus oxychloride and 2-phenyl-4,6-dihydroxypyrimidine. At the same time, the staggered setting of several stirring blade groups can further improve the stirring effect of the materials in the reactor, thereby allowing the phosphorus oxychloride and 2-phenyl-4,6-dihydroxypyrimidine in the reactor to fully react, thereby increasing the preparation efficiency of chlorpyrifos.

[0013] Preferably, the upper and lower ends of each stirring blade are inclined in the same horizontal direction.

[0014] By adopting the above technical solution, the specific setting of the stirring blade makes the middle part of the stirring blade convex, and the upper and lower ends of the stirring blade are inclined in the same horizontal direction, thereby effectively reducing the resistance of the material in the reactor to the stirring blade when the stirring blade rotates with the stirring frame, thereby effectively reducing the torque of the stirring frame from the material, thereby reducing the load of the driving component, and effectively reducing the probability of damage to the stirring blade.

[0015] Preferably, each of the stirring blades is provided with a connecting frame and a plurality of reinforcing frames, and the connecting frame and the plurality of reinforcing frames are located on one side of the stirring blade along its own inclination direction, and each of the reinforcing frames is connected to the upper and lower ends of the stirring blade, and the stirring frame and the reinforcing frame are connected to the corresponding connecting frame.

[0016] By adopting the above technical solution, the connection frame and the reinforcement frame are arranged to support the side of the stirring blade away from the bulge in the middle of the stirring blade, thereby reducing the probability of damage or bending at the upper and lower ends of the stirring blade due to resistance from the material for a long time, thereby effectively ensuring the stirring effect of the material and ensuring the service life of the stirring blade.

[0017] Preferably, a tail gas spray absorption device is further provided on one side of the reactor, the tail gas spray absorption device is connected with the top of the reactor through a pipeline, and a blower is provided on the pipeline connecting the tail gas spray absorption device and the reactor.

[0018] By adopting the above technical scheme, the exhaust gas spray absorption device is set up so that the hydrogen chloride produced by the reaction of phosphorus oxychloride and 2-phenyl-4,6-dihydroxypyrimidine in the reactor can be introduced into the exhaust gas spray absorption device under the action of the blower, so that the hydrogen chloride is absorbed and purified by the exhaust gas spray absorption device, reducing the emission of three wastes, being green and environmentally friendly, and at the same time ensuring the smooth progress of the reaction, reducing the cost of using raw materials, and also reducing the side reactions in the reactor.

[0019] Preferably, the transfer silo is further provided with a pressure reducing valve, the pressure reducing valve is connected to the transfer silo, and the pressure reducing valve is also connected to a vent pipe, and the vent pipe is used to connect to an inert gas source.

[0020] By adopting the above technical solution, the pressure reducing valve and the vent pipe are arranged so that the vent pipe can pass the inert gas into the transfer silo, so that the transfer silo can be filled with nitrogen and can continuously maintain a certain pressure, thereby reducing the probability of the hydrogen chloride gas in the reactor flowing back to the transfer silo.

[0021] In summary, the present application includes at least one of the following beneficial technical effects:

[0022] 1. The arrangement of the transfer silo, the feeding pipe, the powder diaphragm pump and the one-way valve enables the powder diaphragm pump to continuously or intermittently feed the 2-phenyl-4,6-dihydroxypyrimidine powdered solid into the reactor in batches, so that the reaction in the reactor is carried out continuously, thereby ensuring the stability of the reaction in the reactor. At the same time, the presence of the one-way valve makes the flow direction of the feeding pipe a single direction from the transfer silo to the reactor, thereby reducing the probability of hydrogen chloride gas overflowing from the reactor through the feeding pipe, thereby ensuring the safety of the reaction in the reactor and effectively ensuring the preparation efficiency of fenthiocarb;

[0023] 2. The tail gas spray absorption device is set up so that the hydrogen chloride produced by the reaction of phosphorus oxychloride and 2-phenyl-4,6-dihydroxypyrimidine in the reactor can be introduced into the tail gas spray absorption device under the action of the blower, so that the hydrogen chloride is absorbed and purified by the tail gas spray absorption device, reducing the discharge of three wastes, being green and environmentally friendly, while ensuring the smooth progress of the reaction, reducing the cost of raw materials, and reducing the side reactions in the reactor;

[0024] 3. The setting of the pressure reducing valve and the vent pipe enables the vent pipe to pass the inert gas into the transfer silo, so that the transfer silo can be filled with nitrogen and can continuously maintain a certain pressure, thereby reducing the probability of the hydrogen chloride gas in the reactor flowing back to the transfer silo. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram for illustrating the overall chlorination system of fenthiocarb in the embodiments of the present application.

[0026] Figure 2 It is a schematic diagram of the structure of the feed pipe used to reflect the embodiment of the present application.

[0027] Figure 3 It is a schematic diagram of the structure of the stirring frame used to reflect the embodiment of the present application.

[0028] Explanation of the reference numerals: 1. Reactor; 11. Feed pipe; 12. Feed valve; 2. Transfer silo; 21. Feed pipe; 22. Feed valve; 3. Tail gas spray absorption device; 4. Feed pipe; 41. Powder diaphragm pump; 42. One-way valve; 5. Pressure reducing valve; 51. Vent pipe; 6. Stirring mechanism; 61. Driving member; 62. Stirring frame; 63. Stirring blade group; 631. Stirring blade; 64. Connecting frame; 65. Reinforcement frame; 7. Condenser; 8. Intake pipe; 9. Blower. DETAILED DESCRIPTION

[0029] The following is combined with Figure 1-3 This application is described in further detail.

[0030] The present application embodiment discloses a chlorination system of fenthiocarb. Figure 1 The chlorination system of fenthiocarb comprises a reactor 1, a transfer silo 2 and a tail gas spray absorption device 3, wherein the reactor 1 is located between the transfer silo 2 and the tail gas spray absorption device 3. A feeding pipe 4 is also provided at the middle and lower part of the transfer silo 2, and the two ends of the feeding pipe 4 are respectively connected to the reactor 1 and the transfer silo 2. A powder diaphragm pump 41 and a one-way valve 42 are also provided on the feeding pipe 4, and the powder diaphragm pump 41 is used to pass the powdered solid in the transfer silo 2 into the reactor 1. The tail gas spray absorption device 3 is used to absorb the waste gas generated by the reaction in the reactor 1, and the flow direction in the one-way valve 42 is from the transfer silo 2 to the reactor 1.

[0031] Reference Figure 1 A feeding pipe 21 is provided on the top of the transfer silo 2, the bottom of the feeding pipe 21 is connected to the chamber in the transfer silo 2, the bottom of the feeding pipe 21 is fixedly connected to the transfer silo 2, and a feeding valve 22 is fixedly installed on the feeding pipe 21, and the feeding valve 22 is optionally a solenoid valve. The feeding pipe 21 is used to add 2-phenyl-4,6-dihydroxypyrimidine powdered solid into the transfer silo 2.

[0032] Reference Figure 1 The top of the transfer silo 2 is also provided with a pressure reducing valve 5, which is fixedly installed on the top of the transfer silo 2 by bolts. One end of the pressure reducing valve 5 is connected to the transfer silo 2 through a pipeline, and the other end of the pressure reducing valve 5 is connected to a vent pipe 51, which is connected to an inert gas source. Optionally, the inert gas source is an inert gas such as dry air, nitrogen or carbon dioxide, or a mixture of the above substances. The pressure reducing valve 5 is used to maintain the gaseous pressure in the transfer silo. Optionally, the gas pressure maintained by the pressure reducing valve 5 is 0-0.5MPa, and the preferred pressure is 0.01-0.1MPa.

[0033] Reference Figure 1 and Figure 2 The end of the feeding pipe 4 away from the transfer silo 2 is fixedly connected to the transfer silo 2, and the powder diaphragm pump 41 is arranged on the end of the feeding pipe 4 close to the reactor 1. The one-way valve 42 is located on the end of the feeding pipe 4 close to the reactor 1, and the one-way valve 42 is connected to the feeding pipe 4, and the flow direction in the one-way valve 42 is from the transfer silo 2 to the reactor 1.

[0034] Reference Figure 1 and Figure 2 A feed pipe 11 is provided on the top of the reactor 1, and the feed pipe 11 is used to add phosphorus oxychloride into the reactor 1. The feed pipe 11 is connected to the chamber in the reactor 1, and the bottom end of the feed pipe 11 is fixedly connected to the top of the reactor 1 by bolts. A feed valve 12 is also fixedly installed on the feed pipe 11, and the feed valve 12 is optionally a solenoid valve. The reactor 1 is placed on the ground through a bracket.

[0035] Reference Figure 2and Figure 3 The reactor 1 is also provided with a stirring mechanism 6, which includes a driving member 61 and a stirring frame 62. Optionally, the driving member 61 is a servo motor or a stepping motor. The body of the driving member 61 is fixedly mounted on the top of the reactor 1 by bolts, and the output shaft of the driving member 61 is vertically downwardly arranged and rotatably connected to the reactor 1 through a bearing, and the output shaft of the driving member 61 extends into the reactor 1.

[0036] Reference Figure 2 and Figure 3 The top of the stirring frame 62 is rotatably connected to the output shaft of the driving member 61 through a coupling, and the top of the stirring frame 62 is rotatably connected to the reactor 1 through a bearing. A plurality of stirring blade groups 63 are also provided on the stirring frame 62. Optionally, the number of the stirring blade groups 63 is set to three, and they are arranged equidistantly along the axis of the stirring frame 62, and the three stirring blade groups 63 are staggered.

[0037] Reference Figure 2 and Figure 3 Each stirring blade group 63 includes a plurality of stirring blades 631. Optionally, the number of stirring blades 631 in each stirring blade group 63 is set to three. The three stirring blades 631 are arranged at equal angles along the circumference of the axis of the stirring frame 62. One end of each stirring blade 631 is fixedly connected to the side wall of the stirring frame 62 by welding. The upper and lower ends of each stirring blade 631 are inclined in the same horizontal direction, so that the cross section of the stirring blade 631 is an inclined V-shape.

[0038] Reference Figure 2 and Figure 3 Each stirring blade 631 is provided with a connecting frame 64 and a plurality of reinforcing frames 65. The connecting frame 64 and the plurality of reinforcing frames 65 are both located on one side of the stirring blade 631 along its own inclination direction. The plurality of reinforcing frames 65 are arranged along the length direction of the stirring blade 631. The upper and lower ends of each reinforcing frame 65 are fixedly connected to the side wall of the corresponding stirring blade 631 by welding.

[0039] Reference Figure 2 and Figure 3 One end of each connecting frame 64 is fixedly connected to the side wall of the stirring frame 62 by welding, and each connecting frame 64 is arranged along the length direction of the corresponding stirring blade 631. The side wall of each connecting frame 64 is fixedly connected to the corresponding reinforcing frame 65 by welding.

[0040] Reference Figure 1 and Figure 2A condenser 7 is also provided between the tail gas spray absorption device 3 and the reactor 1. The condenser 7 is connected to the top of the reactor 1 through a pipeline. The condenser 7 is used to liquefy and absorb part of the gas passing out of the reactor 1. An intake pipe 8 is provided on the tail gas spray absorption device 3. One end of the intake pipe 8 is connected to the middle of the tail gas spray absorption device 3, and the other end of the intake pipe 8 is connected to the top of the condenser 7. Both ends of the intake pipe 8 are fixedly connected to the tail gas spray absorption device 3 and the condenser 7 by bolts. A blower 9 is fixedly installed on the intake pipe 8, and the blower 9 is connected to the intake pipe 8. The tail gas spray absorption device 3 is used to absorb and purify the hydrogen chloride passing out of the condenser 7, and discharge the harmless gas.

[0041] The implementation principle of a chlorpyrifos chlorination system of an embodiment of the present application is as follows: when in use, the powdered solid of 2-phenyl-4,6-dihydroxypyrimidine is transported to the closed transfer silo 2 through the feed pipe 21, and the transfer silo is connected to the inert gas source through the pressure reducing valve 5, so that the transfer silo 2 is filled with inert gas and continuously maintains a certain pressure. Then a certain amount of phosphorus oxychloride is introduced into the reactor 1, the tail gas spray absorption device 3 is turned on, and then the stirring mechanism 6 is started, and the reactor 1 starts to heat up. Next, the powder diaphragm pump 41 is turned on, and the powdered solid of 2-phenyl-4.6-dihydroxypyrimidine in the transfer silo 2 is added to the reactor 1 through the feeding pipe 4 to react. In this process, the tail gas spray absorption device 3 immediately absorbs the generated hydrogen chloride.

[0042] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A chlorpyrifos chlorination system, comprising a reaction kettle (1), characterized in that: A transfer silo (2) is also provided on one side of the reactor (1), and a feeding pipe (4) is also provided at the lower part of the transfer silo (2). The two ends of the feeding pipe (4) are respectively connected to the reactor (1) and the transfer silo (2). A powder diaphragm pump (41) and a one-way valve (42) are also provided on the feeding pipe (4). The powder diaphragm pump (41) is used to pass the powdered solid in the transfer silo (2) into the reactor (1), and the flow direction of the one-way valve (42) is from the transfer silo (2) to the reactor (1).

2. A chlorpyrifos chlorination system according to claim 1, characterized in that: The reactor (1) is also provided with a stirring mechanism (6), the stirring mechanism (6) comprising a driving member (61) and a stirring frame (62), the stirring frame (62) being located in the reactor (1), the top end of the stirring frame (62) being rotatably connected to the reactor (1), and the driving member (61) being used to drive the stirring frame (62) to rotate.

3. A chlorpyrifos chlorination system according to claim 2, characterized in that: The stirring frame (62) is also provided with a plurality of stirring blade groups (63), each of the stirring blade groups (63) comprises a plurality of stirring blades (631), the plurality of stirring blade groups (63) are arranged along the axis of the stirring frame (62), and the plurality of stirring blade groups (63) are arranged in a staggered manner.

4. A chlorpyrifos chlorination system according to claim 3, characterized in that: The upper and lower ends of each stirring blade (631) are inclined in the same horizontal direction.

5. A chlorpyrifos chlorination system according to claim 4, characterized in that: Each of the stirring blades (631) is provided with a connecting frame (64) and a plurality of reinforcing frames (65); the connecting frame (64) and the plurality of reinforcing frames (65) are both located on one side of the stirring blade (631) along its own inclination direction; each of the reinforcing frames (65) is connected to the upper and lower ends of the stirring blade (631); and the stirring frame (62) and the reinforcing frame (65) are both connected to the corresponding connecting frame (64).

6. A chlorpyrifos chlorination system according to claim 1, characterized in that: A tail gas spray absorption device (3) is also provided on one side of the reactor (1). The tail gas spray absorption device (3) is connected to the top of the reactor (1) through a pipeline. A blower (9) is provided on the pipeline connecting the tail gas spray absorption device (3) and the reactor (1).

7. A chlorpyrifos chlorination system according to claim 1, characterized in that: The transfer silo (2) is also provided with a pressure reducing valve (5), the pressure reducing valve (5) is in communication with the transfer silo (2), and the pressure reducing valve (5) is also in communication with a vent pipe (51), the vent pipe (51) is used to be in communication with an inert gas source.

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