Salicylic nitrile photochemical reaction device

Abstract

The utility model discloses a 2-hydroxy-benzonitril photochemical reaction device which comprises a photochemical kettle, a heating interlayer is arranged outside the photochemical kettle, a methylbenzene adding pipeline, a phosgene introducing pipeline and a solid material adding opening are arranged on the photochemical kettle, a feeding valve is arranged on the solid material adding opening and connected to a discharging opening in the bottom end of a feeding bin hopper, and a discharging opening in the bottom end of the feeding bin hopper is connected to a discharging opening in the bottom end of the discharging bin hopper. Solid materials are contained in the charging hopper, the charging hopper is provided with a spiral conveyor which conveys the materials in the charging hopper into the feeding bin hopper, a feeding draught hood is arranged above the feeding bin hopper, a vacuum pipe is connected to the feeding draught hood, and the vacuum pipe is connected with an emergency vacuum buffer tank. And the labor intensity of manually disassembling the manhole is thoroughly eliminated. And the safety and environmental protection risks in the dismounting and mounting process are eliminated, and the body health of staff is protected. And raw material dust, toluene steam and phosgene generated in the feeding process are eliminated.

Description

Technical Field

[0001] The utility model belongs to the technical field of chemical production equipment, and specifically relates to a salicylic nitrile photochemical reaction device. Background Art

[0002] During the production of salicylic nitrile, salicylamide (solid), phosgene and toluene need to be added into the photochemical autoclave. The current common method of adding materials requires dismantling the manhole of the photochemical autoclave each time and manually adding materials into the photochemical autoclave through the manhole. Each batch of feeding takes 1.5 hours, which is labor-intensive and time-consuming. The feeding process will generate a large amount of raw material dust, residual toluene in the photochemical autoclave, and phosgene leakage, which is harmful to the health of employees. Utility Model Content

[0003] In order to solve the above technical problems, the purpose of the utility model is to provide a salicylic nitrile photochemical reaction device, which can eliminate feeding dust and reduce the labor intensity of employees.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a salicylonitrile photochemical reaction device, comprising a photochemical kettle, a heating interlayer is arranged outside the photochemical kettle, a toluene addition pipeline, a phosgene introduction pipeline and a solid material addition port are arranged on the photochemical kettle, and the characteristic is that a feeding valve is arranged on the solid material addition port, the feeding valve is connected to the bottom discharge port of the feeding hopper, the solid material is contained in the charging hopper, the charging hopper is equipped with a screw conveyor to transport the material in the charging hopper to the feeding hopper, a feeding exhaust hood is arranged above the feeding hopper, a vacuum tube is connected to the feeding exhaust hood, and the vacuum tube is connected to an emergency vacuum buffer tank.

[0005] In the above scheme: the feeding bin is a conical bin with a large top and a small bottom, which is convenient for discharging.

[0006] In the above scheme: a discharge pipeline is arranged at the bottom of the photochemical reactor, and the discharge pipeline is divided into two branches, one of which is connected to the deep cooling reactor, and the other is connected to the accident tank. When an accident occurs, the material is put into the accident tank for treatment.

[0007] In the above scheme: a stirring device is arranged in the photochemical reactor.

[0008] In the above scheme: the photochemical reactor is provided with a toluene water separation device to separate the water in the toluene and reduce the side reaction.

[0009] In the above scheme: the toluene water separation device includes a toluene steam pipeline arranged on the photochemical reactor, the toluene steam pipeline is connected to the condenser, the condenser is connected to the liquid inlet pipe of the water separator, the upper part of the water separator is provided with a toluene reflux port connected to the toluene reflux line on the photochemical reactor, and the bottom of the water separator is provided with a waste liquid discharge pipeline.

[0010] A new negative pressure suction hood is added above the photochemical reactor feeding valve, and a screw conveyor is used to feed from the photochemical reactor feeding valve. Negative pressure suction is performed through the feeding exhaust hood above the feeding valve to eliminate dust generated during the feeding process and residual toluene and phosgene in the photochemical reactor. The emergency vacuum buffer tank is connected to the vacuum pipe.

[0011] The utility model completely eliminates the labor intensity of manually dismantling manholes. It eliminates the safety and environmental risks in the disassembly and assembly process and protects the health of employees. It eliminates the raw material dust, toluene vapor and phosgene generated in the feeding process, and avoids the impact of these substances on the health of workers. It also reduces the dismantling and installation of manholes and the input of consumables in the manhole dismantling process. The feeding time is greatly shortened and the efficiency is improved. It reduces nitrogen consumption and reduces labor input. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a process flow chart of the utility model. DETAILED DESCRIPTION

[0013] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0014] Embodiment 1, as Figure 1 As shown: a salicylonitrile photochemical reaction device, including a photochemical kettle 1, a heating interlayer 2 is arranged outside the photochemical kettle 1, a toluene addition pipeline 3, a phosgene introduction pipeline 4 and a solid material addition port are arranged on the photochemical kettle 1, and toluene and phosgene can be automatically added through pipelines. Valves are arranged on the toluene addition pipeline 3 and the phosgene introduction pipeline 4. A feeding valve 5 is arranged on the solid material addition port, and the feeding valve 5 is connected to the bottom discharge port of the feeding bin 6, and the feeding bin 6 is a conical hopper with a large top and a small bottom. The solid material is placed in the charging hopper 7, and the charging hopper 7 is equipped with a screw conveyor 8 to transport the material in the charging hopper 7 to the feeding bin 6. A feeding exhaust hood 9 is arranged above the feeding bin 6, and a vacuum tube is connected to the feeding exhaust hood 9, and the vacuum tube is connected to the emergency vacuum buffer tank 10.

[0015] A discharge pipeline is provided at the bottom of the photochemical reactor 1, and the discharge pipeline is divided into two branches, one of which is connected to the deep cooling reactor 11, and the other is connected to the accident tank 12. A valve is provided on each branch, and a corresponding valve is also provided on each pipeline. A stirring device 13 is provided in the photochemical reactor 1. A toluene water separation device is provided on the photochemical reactor 1. The toluene water separation device includes a toluene steam pipeline provided on the photochemical reactor, and the toluene steam pipeline is connected to the condenser 14, such as Figure 1As shown, the condenser includes a shell layer and a tube layer located in the shell layer. This is a prior art, and the condenser 14 can also be called a condenser tube. The toluene steam pipeline is connected to the tube layer. The shell layer of the condenser 14 is provided with a circulating water inlet and outlet pipe. The circulating water of the shell layer condenses the toluene steam of the tube layer. The outlet of the tube layer of the condenser 14 is connected to the liquid inlet pipe of the water separator 15. The upper part of the water separator 15 is provided with a toluene reflux port connected to the toluene reflux pipeline on the photochemical reactor. The bottom of the water separator is provided with a waste liquid discharge pipeline.

Claims

1. A salicylonitrile photochemical reaction device, comprising a photochemical kettle, a heating interlayer is arranged outside the photochemical kettle, a toluene feeding pipeline, a phosgene feeding pipeline and a solid material feeding port are arranged on the photochemical kettle, characterized in that: A feeding valve is provided on the solid material addition port, and the feeding valve is connected to the bottom discharge port of the feeding hopper. The solid material is contained in the charging hopper, and the charging hopper is equipped with a screw conveyor to transport the material in the charging hopper to the feeding hopper. A feeding exhaust hood is provided above the feeding hopper, and a vacuum tube is connected to the feeding exhaust hood, and the vacuum tube is connected to the emergency vacuum buffer tank.

2. The salicylonitrile photochemical reaction device according to claim 1, characterized in that: The feeding bin is a conical bin that is larger at the top and smaller at the bottom.

3. The salicylonitrile photochemical reaction device according to claim 1 or 2, characterized in that: A discharge pipeline is arranged at the bottom of the photochemical reactor. The discharge pipeline is divided into two branches, one of which is connected to the deep cooling reactor and the other is connected to the accident tank.

4. The salicylonitrile photochemical reaction device according to claim 3, characterized in that: A stirring device is arranged in the photochemical reactor.

5. The salicylonitrile photochemical reaction device according to claim 4, characterized in that: The photochemical reactor is provided with a toluene water separation device.

6. The salicylonitrile photochemical reaction device according to claim 5, characterized in that: The toluene water separation device comprises a toluene steam pipeline arranged on the photochemical reactor, the toluene steam pipeline is connected to a condenser, the condenser is connected to a liquid inlet pipe of the water separator, a toluene reflux port is arranged on the upper part of the water separator and is connected to a toluene reflux line on the photochemical reactor, and a waste liquid discharge line is arranged on the bottom of the water separator.

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