Continuous production apparatus for p-dichlorobenzene

Abstract

The utility model relates to the technical field of chemical production equipment, concretely to the continuous production device of p - dichlorobenzyl, including the chassis, one side of the chassis top is fixed mounting respectively toluene storage jar, chlorine storage jar and catalyst storage jar, the top of chassis is fixed and installs the continuous reaction kettle in one side of chlorine storage jar, this continuous production device of p - dichlorobenzyl, through the cooperation of chassis, toluene storage jar, chlorine storage jar, catalyst storage jar, first pipeline, metering pump, valve, continuous reaction kettle, rectifying column, condenser, tail gas absorption tower, apron, second pipeline, third pipeline and fourth pipeline, adopt continuous reaction kettle to carry out the reaction, avoids the frequent feeding and discharging process in intermittent production, achieves the continuous production of p - dichlorobenzyl, and the production efficiency is improved significantly. With the help of metering pump, the raw material addition amount is accurately controlled, so that the reaction process is more stable.

Description

Technical Field

[0001] This utility model relates to the field of chemical production equipment technology, specifically to a continuous production apparatus for benzyl dichloroisocyanurate. Background Technology

[0002] p-Dichlorobenzyl is an important organic synthesis intermediate widely used in pharmaceuticals, pesticides, and fragrances. Currently, the main production method for p-dichlorobenzyl is the chlorination reaction of toluene, but traditional production equipment has some problems.

[0003] Traditional production of benzyl parachlorobenzyl often employs batch reactors. These reactors require frequent feeding and discharging operations during the reaction process, resulting in low production efficiency and difficulty in controlling the reaction, leading to unstable product quality. Furthermore, batch production systems have low automation levels, high manual labor intensity, and are prone to operational errors, increasing production costs and safety risks.

[0004] In addition, a large amount of hydrogen chloride gas is generated during the chlorination reaction. Traditional equipment is not good at treating hydrogen chloride gas, which can easily cause environmental pollution. Furthermore, some organic substances that may be carried in the hydrogen chloride gas are not effectively recovered and utilized, resulting in a waste of resources.

[0005] Therefore, it is necessary to provide a continuous production unit for benzyl dichloroisocyanurate to solve the above-mentioned technical problems. Utility Model Content

[0006] The purpose of this invention is to provide a continuous production apparatus for benzyl dichloroisocyanurate to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A continuous production apparatus for benzyl dichloroisocyanurate, comprising:

[0009] A base frame is provided, on one side of the top of which a toluene storage tank, a chlorine storage tank, and a catalyst storage tank are fixedly installed respectively. A continuous reaction vessel is fixedly installed on the top of the base frame on one side of the chlorine storage tank. The top of the continuous reaction vessel is provided with a cover plate. A first pipeline is fixedly connected between the continuous reaction vessel and the toluene storage tank, the chlorine storage tank, and the catalyst storage tank. A metering pump and a valve are provided on the first pipeline. A distillation column is fixedly installed on the top of the base frame on one side of the continuous reaction vessel.

[0010] A second pipe is provided between the continuous reaction vessel and the distillation column. A condenser is fixedly installed on the top of the base frame on one side of the distillation column. A third pipe is provided between the condenser and the distillation column. A tail gas absorption tower is fixedly installed on the top of the base frame on one side of the condenser. A fourth pipe is provided between the tail gas absorption tower and the condenser.

[0011] Preferably, a stirring shaft is rotatably mounted on the bottom of the cover plate, a plurality of stirring rollers are fixedly mounted on the outer wall of the stirring shaft, and a stirring motor is fixedly mounted on the top of the cover plate, with the drive end of the stirring motor passing through the cover plate and extending to the bottom of the cover plate and fixedly connected to the top of the stirring shaft.

[0012] Preferably, a spray pipe is fixedly installed inside the upper part of the base frame, and a number of nozzles are fixedly installed at equal intervals and evenly on the lower side of the outer surface of the spray pipe. An outer pipe is fixedly installed on the upper side of the outer surface of the spray pipe, and one end of the outer pipe penetrates through the exhaust gas absorption tower and extends to one side of the outer surface of the exhaust gas absorption tower.

[0013] Preferably, the interior of the continuous reactor is fixedly equipped with symmetrically distributed electric heating plates.

[0014] Preferably, the cover plate is fixedly installed on the top of the continuous reactor by bolts.

[0015] Preferably, an activated carbon filter is installed inside the exhaust gas absorption tower above the spray pipe.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] 1. This utility model utilizes a base frame, toluene storage tank, chlorine storage tank, catalyst storage tank, first pipeline, metering pump, valves, continuous reactor, distillation column, condenser, tail gas absorption tower, cover plate, second pipeline, third pipeline, and fourth pipeline to conduct the reaction in a continuous reactor. This avoids the frequent feeding and discharging processes of batch production, achieving continuous production of dichlorobenzyl and significantly improving production efficiency. Precise control of the raw material input via the metering pump ensures a more stable reaction process and consistent product quality. The entire production process is automated by a control system, effectively reducing manual intervention, lowering labor intensity and the risk of operational errors, and enhancing production safety.

[0018] 2. This invention utilizes the combined use of a stirring motor, stirring shaft, stirring roller, and electric heating plate. The stirring roller rotates to thoroughly stir the raw materials in the continuous reaction vessel, promoting uniform mixing. Simultaneously, the electric heating plate heats the raw materials inside the continuous reaction vessel, creating suitable temperature conditions for the reaction and thus improving reaction efficiency.

[0019] 3. By using activated carbon filter, external pipe, nozzle and spray pipe in combination, this utility model can not only efficiently treat hydrogen chloride gas in exhaust gas and effectively reduce the degree of environmental pollution, but also realize the recycling of resources by adsorbing and recovering organic matter in exhaust gas through activated carbon filter, thereby reducing production costs to a certain extent. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model;

[0021] Figure 2 This is a structural schematic diagram from another perspective of the present invention;

[0022] Figure 3 This is a bottom sectional view of the tail gas absorption tower in this utility model.

[0023] Figure 4 This is a top view of the structure connecting the reactor in this utility model.

[0024] In the diagram: 1. Base frame; 2. Toluene storage tank; 3. Chlorine storage tank; 4. Catalyst storage tank; 5. First pipeline; 6. Metering pump; 7. Valve; 8. Continuous reaction vessel; 9. Distillation column; 10. Condenser; 11. Tail gas absorption tower; 12. Cover plate; 13. Stirring motor; 14. Stirring shaft; 15. Stirring roller; 16. Second pipeline; 17. Third pipeline; 18. Fourth pipeline; 19. Activated carbon filter screen; 20. External connecting pipe; 21. Electric heating plate; 22. Nozzle; 23. Spray pipe. Detailed Implementation

[0025] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0026] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0027] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] Please see Figures 1-4 The embodiments provided by this utility model are as follows:

[0030] A continuous production apparatus for benzyl dichloroisocyanurate, comprising:

[0031] A base frame 1 is provided. A toluene storage tank 2, a chlorine storage tank 3, and a catalyst storage tank 4 are fixedly installed on one side of the top of the base frame 1. A continuous reactor 8 is fixedly installed on the top of the base frame 1, located on the side of the chlorine storage tank 3. A cover plate 12 is provided on the top of the continuous reactor 8. A first pipe 5 is fixedly connected between the continuous reactor 8 and the toluene storage tank 2, the chlorine storage tank 3, and the catalyst storage tank 4. A metering pump 6 and a valve 7 are provided on the first pipe 5. A distillation column 9 is fixedly installed on the top of the base frame 1, located on the side of the continuous reactor 8.

[0032] A second pipe 16 is provided between the continuous reaction vessel 8 and the distillation column 9. A condenser 10 is fixedly installed on the top of the base frame 1 on one side of the distillation column 9. A third pipe 17 is provided between the condenser 10 and the distillation column 9. A tail gas absorption tower 11 is fixedly installed on the top of the base frame 1 on one side of the condenser 10. A fourth pipe 18 is provided between the tail gas absorption tower 11 and the condenser 10.

[0033] A stirring shaft 14 is rotatably mounted on the bottom of the cover plate 12. Several stirring rollers 15 are fixedly mounted on the outer wall of the stirring shaft 14. A stirring motor 13 is fixedly mounted on the top of the cover plate 12, and the driving end of the stirring motor 13 passes through the cover plate 12 and extends to the bottom of the cover plate 12 and is fixedly connected to the top of the stirring shaft 14.

[0034] In one embodiment, a spray pipe 23 is fixedly installed on the upper part of the base frame 1. Several nozzles 22 are fixedly installed at equal intervals and uniformly on the lower side of the outer surface of the spray pipe 23. An outer pipe 20 is fixedly installed on the upper side of the outer surface of the spray pipe 23. One end of the outer pipe 20 penetrates the tail gas absorption tower 11 and extends to one side of the outer surface of the tail gas absorption tower 11. This can efficiently treat hydrogen chloride gas in the tail gas and effectively reduce the degree of pollution to the environment.

[0035] In one preferred embodiment, symmetrically distributed electric heating plates 21 are fixedly installed inside the continuous reaction vessel 8 to ensure that the materials are heated evenly, thereby improving the reaction rate and efficiency.

[0036] In one embodiment, the cover plate 12 is fixedly installed on the top of the continuous reactor 8 by bolts, which facilitates disassembly and installation. When it is necessary to inspect, clean or maintain the inside of the continuous reactor 8, the cover plate 12 can be removed relatively easily and reinstalled after the operation is completed, which can effectively improve the work efficiency of equipment maintenance.

[0037] In one preferred embodiment, an activated carbon filter 19 is installed inside the exhaust gas absorption tower 11 above the spray pipe 23, which can further adsorb residual organic matter, odors, etc. in the exhaust gas, improve the exhaust gas purification effect, reduce the emission of harmful substances, and make the final exhaust gas cleaner and more environmentally friendly.

[0038] The working principle of this utility model is as follows: All electrical components mentioned are electrically connected to the main controller and power supply. The main controller can be a computer or other conventionally known control device, and existing publicly available power connection technologies are not elaborated here. Parts not mentioned in this device are the same as or can be implemented using existing technologies. During the production of dichlorobenzyl, the controller, based on preset production parameters, opens valves 7 on the three first pipes 5 and respectively regulates the metering pumps 6 on these three first pipes 5, delivering toluene, chlorine, and catalyst to the continuous reaction vessel 8 through the first pipes 5 in precise proportions, promoting thorough mixing of the raw materials in the continuous reaction vessel 8. The product generated by the reaction enters the distillation column 9 through the second pipe 16 for separation and purification. The gaseous product in the distillation column 9 enters the condenser 10 through the third pipe 17, where it is cooled and converted into a liquid phase. Part of the liquid product is returned to the distillation column 9, while the other part is collected as a qualified product. The tail gas generated during the reaction enters the tail gas absorption tower 11 through the fourth pipe 18 for harmless treatment. The continuous reaction vessel 8 avoids the frequent feeding and discharging processes of batch production, achieving continuous production of dichlorobenzyl and significantly improving production efficiency. The metering pump 6 precisely controls the amount of raw materials added, making the reaction process more stable and ensuring consistent product quality. The entire production process is automated by a control system, effectively reducing manual intervention, lowering labor intensity and the risk of operational errors, and enhancing production safety.

[0039] Once the various raw materials enter the continuous reactor 8, the stirring motor 13 immediately starts running. Its drive end drives the stirring shaft 14 to rotate, and the rotation of the stirring shaft 14 further drives the stirring roller 15 to rotate synchronously. The stirring roller 15 thoroughly stirs the raw materials in the continuous reactor 8 through rotation, promoting uniform mixing of the raw materials. At the same time, the electric heating plate 21 activates its heating function for the raw materials inside the continuous reactor 8, creating suitable temperature conditions for the reaction, thereby improving reaction efficiency.

[0040] During the reaction process, the exhaust gas enters the exhaust gas absorption tower 11 through the fourth pipe 18. An external pipe 20 is pre-connected to an absorbent liquid pipe. During exhaust gas purification, the absorbent liquid is transported through the external pipe 20 to the spray pipe 23 and finally atomized and sprayed out through the nozzle 22, making full contact with the exhaust gas in the base frame 1 to absorb hydrogen chloride gas. Organic matter that may be carried in the exhaust gas rises with the gas and is adsorbed and trapped by the activated carbon filter 19. The gas, after preliminary treatment, then undergoes further deep treatment and is finally discharged in compliance with standards. This device not only efficiently treats hydrogen chloride gas in the exhaust gas, effectively reducing environmental pollution, but also achieves resource recycling through the adsorption and recovery of organic matter in the exhaust gas via the activated carbon filter 19, thus reducing production costs to a certain extent.

[0041] It should be noted that the specific structures of the distillation column 9 and the condenser 10 can be referenced from existing technologies and are easily implemented by those skilled in the art. This application aims to improve upon the problems of low production efficiency, unstable product quality, and environmental pollution and resource waste caused by poor tail gas treatment in traditional batch production of benzyl dichloroisocyanurate.

[0042] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A continuous production apparatus for benzyl dichlorophenoxyacetate, characterized in that, It includes: A base frame (1) is provided with a toluene storage tank (2), a chlorine storage tank (3) and a catalyst storage tank (4) fixedly installed on one side of the top of the base frame (1). A continuous reactor (8) is fixedly installed on the top of the base frame (1) on one side of the chlorine storage tank (3). A cover plate (12) is provided on the top of the continuous reactor (8). A first pipe (5) is fixedly connected between the continuous reactor (8) and the toluene storage tank (2), the chlorine storage tank (3) and the catalyst storage tank (4). A metering pump (6) and a valve (7) are provided on the first pipe (5). A distillation column (9) is fixedly installed on the top of the base frame (1) on one side of the continuous reactor (8). A second pipe (16) is provided between the continuous reactor (8) and the distillation column (9). A condenser (10) is fixedly installed on the top of the base frame (1) on one side of the distillation column (9). A third pipe (17) is provided between the condenser (10) and the distillation column (9). A tail gas absorption tower (11) is fixedly installed on the top of the base frame (1) on one side of the condenser (10). A fourth pipe (18) is provided between the tail gas absorption tower (11) and the condenser (10).

2. The continuous production apparatus for benzyl dichloroethylene according to claim 1, characterized in that: A stirring shaft (14) is rotatably mounted on the bottom of the cover plate (12). Several stirring rollers (15) are fixedly mounted on the outer wall of the stirring shaft (14). A stirring motor (13) is fixedly mounted on the top of the cover plate (12). The driving end of the stirring motor (13) passes through the cover plate (12) and extends to the bottom of the cover plate (12) and is fixedly connected to the top of the stirring shaft (14).

3. The continuous production apparatus for benzyl dichloroethylene according to claim 1, characterized in that: A spray pipe (23) is fixedly installed on the upper part of the base frame (1). Several nozzles (22) are fixedly installed at equal intervals and evenly on the lower side of the outer surface of the spray pipe (23). An outer pipe (20) is fixedly installed on the upper side of the outside of the spray pipe (23). One end of the outer pipe (20) penetrates the tail gas absorption tower (11) and extends to one side of the outer surface of the tail gas absorption tower (11).

4. The continuous production apparatus for benzyl dichloroethylene according to claim 1, characterized in that: The continuous reactor (8) is equipped with symmetrically distributed electric heating plates (21).

5. The continuous production apparatus for benzyl dichloroethylene according to claim 1, characterized in that: The cover plate (12) is fixedly installed on the top of the continuous reactor (8) by bolts.

6. The continuous production apparatus for benzyl dichloroethylene according to claim 3, characterized in that: An activated carbon filter (19) is installed inside the exhaust gas absorption tower (11) above the spray pipe (23).

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