CN216321813U

CN216321813U - Isophthalonitrile production system

Info

Publication number: CN216321813U
Application number: CN202122808814.6U
Authority: CN
Inventors: 胡红一; 严鑫; 汪静莉; 杨露; 常亚军
Original assignee: Taizhou Bailly Chemical Co ltd
Current assignee: Taizhou Bailly Chemical Co ltd
Priority date: 2021-11-17
Filing date: 2021-11-17
Publication date: 2022-04-19
Anticipated expiration: 2031-11-17

Abstract

The utility model relates to an m-phthalonitrile production system, wherein a m-xylene storage tank is fed and connected with a vaporizer, the ammonia storage tank is sequentially fed and connected with a first heat path inlet of the vaporizer through an ammonia heater and an ammonia buffer tank, a first heat path outlet of the vaporizer is connected with a fluidized bed, the fluidized bed is discharged through an oil cooler and connected with a catcher, a heat-conducting oil tank is fed into the other heat path inlet of the vaporizer, the other heat path outlet of the vaporizer is connected with the oil cooler, the upper part of the catcher extends to the position below the liquid level in a water seal barrel through a pipeline, and the lower part of the catcher is sequentially connected with an m-phthalonitrile collecting box through a material washing kettle, a filter press and a dryer. The system can effectively utilize heat energy, reduce energy consumption, reduce production cost, effectively recover the catalyst and improve the purity and quality of the product.

Description

Isophthalonitrile production system

Technical Field

The utility model relates to a chemical production device, in particular to an m-phthalonitrile production system.

Background

Isophthalonitrile is an important organic intermediate and widely used for medicines and fuels. In the existing production process, m-xylene and ammonia gas are adopted for reaction, ammonia gas needs to be heated before fluidized reaction, heat is greatly wasted after fluidized bed reaction discharging, energy waste is serious, production cost is high, and the purity of a final product is seriously influenced because a fluidized bed product contains particles such as a catalyst.

Disclosure of Invention

Aiming at the problems, the utility model provides the isophthalonitrile production system which can effectively utilize heat energy, reduce energy consumption and production cost, effectively recover the catalyst and improve the purity and quality of the product.

The technical scheme adopted by the utility model is as follows: an m-phthalonitrile production system which characterized in that: the device comprises a meta-xylene storage tank, an ammonia heater, an ammonia buffer tank, a vaporizer, a fluidized bed, an air buffer tank, an oil cooler, a heat-conducting oil tank, a trap, a water seal barrel, a washing kettle, a filter press, a dryer and a meta-phthalonitrile collecting box, wherein the meta-xylene storage tank is connected with the vaporizer in a feeding way, the ammonia storage tank is sequentially connected with a heat-path inlet of the vaporizer in a feeding way through the ammonia heater and the ammonia buffer tank, a heat-path outlet of the vaporizer is connected with the fluidized bed, the fluidized bed is connected with the trap through the discharging of the oil cooler, the heat-conducting oil tank is connected with the other heat-path inlet of the vaporizer in an oil feeding way, the other heat-path outlet of the vaporizer is connected with the oil cooler, the upper part of the trap extends to the position below the liquid level in the water seal barrel through a pipeline, and the lower part of the trap is sequentially connected with the meta-phthalonitrile collecting box through the washing kettle, the filter press and the dryer.

The oil cooler is connected with the upper part of the first trap, the discharge of the lower part of the first trap is divided into two paths, one path is connected with the washing kettle, the other path is connected with the lower part of the third trap, the upper part of the third trap is connected with the lower part of the second trap, and the middle part of the third trap extends to the position below the liquid level in the water seal barrel through a pipeline.

The fluidized bed is connected with an air buffer tank.

The utility model adopts the heat-conducting oil tank to absorb heat and exchange heat between the oil cooler and the vaporizer, can effectively utilize heat energy in a fluidized bed product, returns the generated heat energy to be utilized and heats ammonia gas by the vaporizer, reduces the heating cost of the ammonia gas, is matched with a plurality of traps to divide the first trap into a first path to trap catalyst particles, then carries out a second path of trapping of partial gas containing particles by the third and second traps when being conveyed to a washing kettle, finally extends into a water seal barrel to filter out the catalyst by water, and the generated isophthalonitrile is washed by the washing kettle, then is subjected to pressure filtration and drying to form final crystal or powdery isophthalonitrile, can effectively recover the catalyst in the product, and improves the purity and quality of the product.

Drawings

FIG. 1 is a schematic view of the structure of the present invention.

In the figure: the device comprises a meta-xylene storage tank 1, an ammonia storage tank 2, an ammonia heater 3, an ammonia buffer tank 4, a vaporizer 5, a fluidized bed 6, an air buffer tank 7, a heat-conducting oil tank 8, an oil cooler 9, a first trap 10, a second trap 11, a third trap 12, a water seal barrel 13, a washing kettle 14, a filter press 15, a dryer 16 and an m-phthalonitrile collecting box 17.

Detailed Description

The following further description is made in conjunction with the accompanying drawings and examples.

FIG. 1 shows: an m-xylene dinitrile production system comprises an m-xylene storage tank 1, an ammonia storage tank 2, an ammonia heater 3, an ammonia buffer tank 4, a vaporizer 5, a fluidized bed 6, an air buffer tank 7, an oil cooler 8, a heat-conducting oil tank 9, a first catcher 10, a second catcher 11, a third catcher 12, a water seal barrel 13, a washing kettle 14, a filter press 15, a dryer 16, an m-xylene dinitrile collecting tank 17 and a m-xylene storage tank 1 which are connected with a hot process inlet of the vaporizer 5 in a feeding manner, the ammonia storage tank 2 is connected with a hot process inlet of the vaporizer 5 in a feeding manner through the ammonia heater 3 and the ammonia buffer tank 4 in sequence, a hot process outlet of the vaporizer 5 is connected with the fluidized bed 6, the upper part of the fluidized bed 6 is connected with the upper part of the first catcher 10 in a cooling process of the oil cooler 9, oil is sent through the heat-conducting oil tank 8 and then connected with another hot process inlet of the vaporizer, and another hot process outlet of the vaporizer is connected with a heat-exchanging process of the oil cooler 9, the fluidized bed is connected with an air buffer tank 7, the discharge of the lower part of the first catcher is divided into two paths, one path is connected with a washing kettle 14, the washing kettle 14 is connected with an isophthalonitrile collecting box 17 through a filter press 15 and a dryer 16, the other path is connected with the lower part of a third catcher 12, the upper part of the third catcher 12 is connected with the lower part of a second catcher 11, and the middle part of the third catcher extends to the position below the liquid level in a water seal barrel 13 through a pipeline.

Claims

1. An m-phthalonitrile production system which characterized in that: the device comprises a meta-xylene storage tank, an ammonia heater, an ammonia buffer tank, a vaporizer, a fluidized bed, an air buffer tank, an oil cooler, a heat-conducting oil tank, a trap, a water seal barrel, a washing kettle, a filter press, a dryer and a meta-phthalonitrile collecting box, wherein the meta-xylene storage tank is connected with the vaporizer in a feeding way, the ammonia storage tank is sequentially connected with a heat-path inlet of the vaporizer in a feeding way through the ammonia heater and the ammonia buffer tank, a heat-path outlet of the vaporizer is connected with the fluidized bed, the fluidized bed is connected with the trap through the discharging of the oil cooler, the heat-conducting oil tank is connected with the other heat-path inlet of the vaporizer in an oil feeding way, the other heat-path outlet of the vaporizer is connected with the oil cooler, the upper part of the trap extends to the position below the liquid level in the water seal barrel through a pipeline, and the lower part of the trap is sequentially connected with the meta-phthalonitrile collecting box through the washing kettle, the filter press and the dryer.

2. The isophthalonitrile production system according to claim 1, wherein: the oil cooler is connected with the upper part of the first trap, the discharge of the lower part of the first trap is divided into two paths, one path is connected with the washing kettle, the other path is connected with the lower part of the third trap, the upper part of the third trap is connected with the lower part of the second trap, and the middle part of the third trap extends to the position below the liquid level in the water seal barrel through a pipeline.

3. The isophthalonitrile production system according to claim 1, wherein: the fluidized bed is connected with an air buffer tank.