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A method for reducing the accumulation of nitrogen trichloride during the use of liquid chlorine

A nitrogen trichloride and liquid chlorine technology, applied in the container discharge method, container filling method, gas treatment/storage purpose, etc., can solve problems such as equipment damage, accumulation of nitrogen trichloride, casualties, etc., to eliminate explosions effect of risk

Active Publication Date: 2022-03-01
中化蓝天氟材料有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Under normal circumstances, the content of nitrogen trichloride in liquid chlorine is a small amount, but during the use of liquid chlorine, it is easy to cause accumulation of nitrogen trichloride, and there is a potential risk of explosion
In recent years, in the process of producing and using liquid chlorine in China, due to Cl 2 Contains NCl 3 There have been many explosion accidents caused by exceeding the standard, which not only endangers safe production, but also causes serious damage to equipment and casualties

Method used

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  • A method for reducing the accumulation of nitrogen trichloride during the use of liquid chlorine
  • A method for reducing the accumulation of nitrogen trichloride during the use of liquid chlorine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The storage tank used has a feed inlet higher than the discharge outlet, and the inclination of the cylinder is 5°. The vaporizer used has the inlet at the top and the outlet at the bottom. The buffer tank used has its inlet and outlet on the same level.

[0033] When the liquid chlorine tank truck 1 unloads, the liquid chlorine pressure in the liquid chlorine storage tank 2 is about 0.6MPa, and the pressure of the liquid chlorine coming out of the storage tank 2 outlets is raised to about 0.8MPa by the discharge pump 3, and the The flow rate of about 200kg / hr is delivered to vaporizer 4. The vaporizer 4 is heated by hot water to keep the temperature inside the vaporizer 4 at about 30° C., and the chlorine gas obtained at the outlet of the vaporizer 4 enters the buffer tank 5 . The chlorine gas with a pressure of about 0.8MPa obtained at the outlet of the buffer tank 5 enters the tank car 1, so that the liquid chlorine in the tank car 1 is continuously discharged to t...

Embodiment 2

[0037] In the storage tank used, its feed inlet is higher than the discharge outlet, and the angle formed by the inclined plane formed by the horizontal height of the feed inlet and the horizontal height of the discharge outlet and the horizontal plane is 20°. In the vaporizer used, the feed inlet is higher than the discharge outlet, and the angle between the inclined plane formed by the level of the feed inlet and the level of the discharge outlet and the horizontal plane is 30°. In the buffer tank used, the feed inlet is higher than the discharge outlet, and the angle between the inclined plane formed by the level of the feed inlet and the level of the discharge outlet and the horizontal plane is 40°.

[0038] When the liquid chlorine tank truck 1 was unloading, the liquid chlorine pressure in the liquid chlorine storage tank 2 was about 0.7MPa, and the pressure of the liquid chlorine coming out of the storage tank 2 discharge port was raised to about 0.9MPa by the discharge ...

Embodiment 3

[0042] In the storage tank used, its feed inlet is higher than the discharge outlet, and the angle formed between the inclined plane formed by the level of the feed inlet and the level of the discharge outlet and the horizontal plane is 45°. The vaporizer used has its inlet and outlet on the same level. The buffer tank used has the inlet at the top and the outlet at the bottom.

[0043] When the liquid chlorine tank truck 1 was unloading, the liquid chlorine pressure in the liquid chlorine storage tank 2 was about 0.8MPa, and the pressure of the liquid chlorine coming out of the storage tank 2 discharge port was raised to about 1.0MPa by the discharge pump 3, and the pressure was increased to about 1.0MPa with The flow rate of about 400kg / hr is sent to vaporizer 4. The vaporizer 4 is heated by hot water to keep the temperature inside the vaporizer 4 at about 39° C., and the chlorine gas obtained at the outlet of the vaporizer 4 enters the buffer tank 5 . The chlorine gas wit...

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Abstract

The invention discloses a method for reducing the accumulation of nitrogen trichloride during the use of liquid chlorine, which is realized by setting the feed ports of storage tanks, vaporizers and buffer tanks higher than the discharge ports during the unloading and feeding processes . In the unloading stage, the accumulation of nitrogen trichloride in the equipment can be reduced, and in the feed process, nitrogen trichloride undergoes thermal decomposition reaction and decomposes in the raw material mixer. The method provided by the invention can effectively reduce the accumulation of nitrogen trichloride in equipment during the use of liquid chlorine.

Description

technical field [0001] The invention relates to a method for reducing the accumulation of nitrogen trichloride, in particular to a method for reducing the accumulation of nitrogen trichloride during the use of liquid chlorine. Background technique [0002] The molecular formula for liquid chlorine is Cl 2 , with a relative density of 1.426, a melting point of -34.6°C, and a boiling point of -101.5°C. It is an important industrial raw material and is widely used in my country's pharmaceutical, pesticide, and chemical industries. Liquid chlorine is generally prepared by electrolysis of table salt. When chlorine gas is produced by electrolysis of table salt, the ammonia and ammonium substances contained in the brine will cause nitrogen trichloride to accompany the chlorine gas. [0003] Nitrogen trichloride molecular formula NCl 3 , relative density is 1.653, melting point<-40°C, boiling point<71°C, natural explosion point 95°C, yellow viscous liquid or orthorhombic cry...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F17C7/04F17C13/12F17C13/00
CPCF17C7/04F17C13/12F17C13/00F17C2223/013F17C2225/0123F17C2227/01F17C2227/04F17C2260/042
Inventor 马建伟吕正璋吴俊杰张杨飞彭景煜钟林
Owner 中化蓝天氟材料有限公司