Chlorination reaction kettle for o-chlorobenzaldehyde production

Abstract

The utility model relates to the technical field of chlorination reaction devices, in particular to a chlorination reaction kettle for o-chlorobenzaldehyde production, which is characterized in that a hollow pipe is rotatably connected in a kettle body, the hollow pipe is in transmission connection with an output end of a motor, stirring rods are fixedly connected on the hollow pipe at intervals, a plurality of air outlet holes are formed in the stirring rods, and the stirring rods are connected with the motor. The upper end of the hollow pipe penetrates through the kettle body and the jacket and is connected with an air inlet pipe through a rotary joint, and circular truncated cones protrude inwards at intervals on the side wall of the kettle body. According to the utility model, the hollow pipe is rotationally arranged in the kettle body, the hollow pipe is connected with the stirring rod provided with the air outlet holes, and the upper end of the hollow pipe is connected with the air inlet pipe through the rotary joint, so that the problem of serious local reaction caused by non-uniform distribution of chlorine can be avoided; the circular truncated cones protruding inwards are arranged on the side wall of the kettle body at intervals, so that the problem of insufficient reaction caused by non-uniform temperature in the reaction process in the kettle body is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of chlorination reaction devices, and specifically relates to a chlorination reaction kettle for the production of o-chlorobenzaldehyde. Background Technique

[0002] O-chlorobenzaldehyde is an important raw material or intermediate for medicines, pesticides, dyes and fine chemicals, and can be used to manufacture pharmaceuticals, acaricides, dyes and zinc plating brighteners, etc. At present, at home and abroad, when producing o-chlorobenzaldehyde, o-chlorotoluene is usually used as the raw material, and chlorine gas is introduced for chlorination reaction, so a chlorination reaction device is required. During the chlorination reaction process, the reaction temperature needs to be controlled between 130 - 150 °C, and at the same time, the chlorine gas needs to be evenly distributed in the reactor. However, the existing chlorination reaction devices have the problems of uneven distribution of chlorine gas and uneven reaction temperature in the device, resulting in serious local reactions, inability to strictly control the occurrence of side reactions, and low yield of the chlorination reaction. Therefore, it is necessary to develop a chlorination reaction kettle for the production of o-chlorobenzaldehyde that can evenly distribute chlorine gas and reaction temperature. Content of the Utility Model

[0003] Aiming at the above technical problems, the utility model provides a chlorination reaction kettle for the production of o-chlorobenzaldehyde that can evenly distribute chlorine gas and reaction temperature, so as to solve the problems of uneven distribution of chlorine gas and uneven temperature in the existing chlorination reaction device, resulting in low yield of the chlorination reaction.

[0004] To solve the above technical problems, a chlorination reaction kettle for the production of o-chlorobenzaldehyde described in the utility model includes a kettle body. A jacket is fixedly connected to the outside of the kettle body. A feed pipe is connected to the top of the kettle body, and a discharge pipe is connected to the bottom. A first valve is connected to the discharge pipe. A hollow pipe is rotatably connected inside the kettle body, and the hollow pipe is in transmission connection with the output end of a motor. Stirring rods are fixedly connected to the hollow pipe at intervals, and a number of air holes are opened on the stirring rods. The upper end of the hollow pipe penetrates through the kettle body and the jacket and is connected to an inlet pipe through a rotary joint. The side wall of the kettle body protrudes inward at intervals with frustum cones. One side of the jacket is connected with a circulating feed pipe, and the other side is connected with a circulating discharge pipe.

[0005] Further, a first bevel gear is fixedly connected to the upper part of the hollow pipe, and a second bevel gear is fixedly connected to the output shaft of the motor. The first bevel gear meshes with the second bevel gear.

[0006] Further, a chlorine gas booster pump is fixedly connected to the inlet pipe.

[0007] Further, second valves are fixedly connected to both the circulating feed pipe and the circulating discharge pipe.

[0008] Further, legs are fixedly connected to the bottom of the jacket.

[0009] Furthermore, the feed pipe is detachably connected with an end cover.

[0010] Compared with the prior art, the utility model has the following advantages:

[0011] The utility model has a hollow tube rotatably arranged in a kettle body, a stirring rod with an air outlet is connected to the hollow tube, and the upper end of the hollow tube is connected to an air inlet pipe through a rotating joint, so that chlorine can be uniformly mixed in an o-chlorotoluene solution while stirring, so that the chlorine and the o-chlorotoluene solution react fully, and the problem of serious local reaction caused by uneven distribution of chlorine can be avoided; and the side wall of the kettle body is provided with an inwardly protruding round table, so that the temperature in the kettle body can be uniformly controlled, and the problem of insufficient reaction caused by uneven temperature during the reaction in the kettle body can be avoided. The use of the device solves the problem of low chlorination reaction yield. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the structure of the utility model.

[0013] In the figure: 1, kettle body, 2, jacket, 3, hollow tube, 4, stirring rod, 5, motor, 6, rotary joint, 7, air inlet pipe, 8, feed pipe, 9, discharge pipe, 10, first valve, 11, round table, 12, circulation feed pipe, 13, circulation discharge pipe, 14, second valve, 15, chlorine booster pump, 16, first bevel gear, 17, second bevel gear, 18, support leg. DETAILED DESCRIPTION

[0014] The utility model will be further described below in conjunction with the accompanying drawings.

[0015] like Figure 1 A chlorination reaction kettle for the production of o-chlorobenzaldehyde is shown, comprising a kettle body 1, a jacket 2 is fixedly connected to the outside of the kettle body 1, the kettle body 1 and the jacket 2 are fixedly connected by a connecting rod to form a cavity, a feed pipe 8 is fixedly connected to the top of the kettle body 1 through the jacket 2, and a discharge pipe 9 is fixedly connected to the bottom of the kettle body 1 through the jacket 2, and a first valve 10 is connected to the discharge pipe 9, and the first valve 10 is a ball valve. A hollow tube 3 is rotatably connected to the kettle body 1 through a sealed bearing, and the hollow tube 3 is transmission-connected to the output end of a motor 5 located at the top of the jacket 2, a plurality of stirring rods 4 are fixedly connected to the hollow tube 3 at intervals, and a plurality of air outlets are opened on the stirring rod 4, the upper end of the hollow tube 3 penetrates the kettle body 1 and the jacket 2 and is connected to the lower end of a rotary joint 6, and the upper end of the rotary joint 6 is connected to an air inlet pipe 7, and a truncated cone 11 protrudes inward from the side wall of the kettle body 1 at intervals, and the cross-section of the truncated cone 11 is a trapezoidal structure, and a circulating feed pipe 12 is connected to one side of the upper part of the jacket 2, and a circulating discharge pipe 13 is connected to the other side.

[0016] In order to drive the hollow tube 3 to rotate stably through the motor 5, a first bevel gear 16 is fixedly connected to the upper part of the hollow tube 3, and a second bevel gear 17 is fixedly connected to the output shaft of the motor 5. The first bevel gear 16 meshes with the second bevel gear 17.

[0017] It should be noted that the motor 5 and the hollow tube 3 can also be driven by means of a pulley and belt drive, a sprocket and chain drive, etc.

[0018] In order to increase the pressure of chlorine gas and ensure its uniform dispersion from the air outlet holes after entering the reaction kettle, a chlorine gas booster pump 15 is fixedly connected to the inlet pipe 7.

[0019] In order to facilitate the circulation of the temperature control medium, second valves 14 are fixedly connected to both the circulating feed pipe 12 and the circulating discharge pipe 13. The second valves 14 are ball valves. The circulating feed pipe 12 is connected to the temperature control device and is used to introduce the medium into the jacket 2, and steam or circulating water can be used for temperature control.

[0020] In order to facilitate the overall support of the equipment and facilitate discharging, legs 18 are fixedly connected to the bottom of the jacket 2, and a fixing plate is connected to the bottom of the legs 18.

[0021] In order to facilitate the sealing of the feed pipe 8 after feeding, an end cover is flange-connected to the feed pipe 8.

[0022] The working process of this embodiment is as follows:

[0023] When producing o-chlorobenzaldehyde, o-chlorotoluene is added into the kettle body 1 through the feed pipe 8. Then, the second valve 14 on the circulating feed pipe 12 is opened, and the temperature control medium enters the jacket 2 and the frustum 11, and the reaction kettle is controlled to heat up evenly. Chlorine gas is introduced into the hollow tube 3 through the inlet pipe 7, and at the same time, the chlorine gas booster pump 15 is started for boosting, and the motor 5 is started to run synchronously. The motor 5 drives the second bevel gear 17 to rotate, the second bevel gear 17 drives the first bevel gear 16 to rotate, and then drives the hollow tube 3 to rotate. The stirring rod 4 stirs the solution in the reaction kettle. At the same time, chlorine gas enters the reaction kettle evenly from the air outlet holes and reacts with the o-chlorotoluene solution. After the reaction is completed, the first valve 10 on the discharge pipe 9 is opened for discharging.

Claims

1. A chlorination reaction kettle for producing o-chlorobenzaldehyde, comprising a kettle body (1), a jacket (2) fixedly connected to the outside of the kettle body (1), a feed pipe (8) connected to the top of the kettle body (1), and a discharge pipe (9) connected to the bottom, wherein the discharge pipe (9) is connected to a first valve (10), characterized in that: A hollow tube (3) is rotatably connected inside the kettle body (1), and the hollow tube (3) is drivingly connected to the output end of the motor (5). A stirring rod (4) is fixedly connected to the hollow tube (3) at intervals, and a plurality of air outlet holes are provided on the stirring rod (4). The upper end of the hollow tube (3) passes through the kettle body (1) and the jacket (2) and is connected to the air inlet pipe (7) through a rotating joint (6). A truncated cone (11) protrudes inwardly from the side wall of the kettle body (1), and a circulating feed pipe (12) is connected to one side of the jacket (2), and a circulating discharge pipe (13) is connected to the other side.

2. The chlorination reaction kettle for o-chlorobenzaldehyde production according to claim 1, characterized in that: A first bevel gear (16) is fixedly connected to the upper portion of the hollow tube (3), and a second bevel gear (17) is fixedly connected to the output shaft of the motor (5); the first bevel gear (16) and the second bevel gear (17) are meshed with each other.

3. The chlorination reaction kettle for producing o-chlorobenzaldehyde according to claim 1, characterized in that: The air inlet pipe (7) is fixedly connected to a chlorine booster pump (15).

4. The chlorination reaction kettle for o-chlorobenzaldehyde production according to claim 1, characterized in that: The circulating feed pipe (12) and the circulating discharge pipe (13) are both fixedly connected with a second valve (14).

5. The chlorination reaction kettle for producing o-chlorobenzaldehyde according to claim 1, characterized in that: The bottom of the jacket (2) is fixedly connected with a support leg (18).

6. The chlorination reaction kettle for producing o-chlorobenzaldehyde according to claim 1, characterized in that: The feed pipe (8) is detachably connected with an end cap.

Images