Valves play a key control role in the chemical industry, and their applications cover the whole process of raw material processing, reaction process, product separation, storage and transportation, environmental protection treatment, etc. Since chemical media are often highly corrosive, high temperature and high pressure, flammable and explosive, and highly toxic, valves must meet stringent requirements such as high sealing, corrosion resistance, resistance to extreme working conditions, safety and reliability.

 

Applications of valves in the gas industry

 

I. Raw material processing and transportation

a. Liquid/gas raw material transportation

- Applications: pipeline transportation of acids (sulfuric acid, hydrochloric acid), alkalis (caustic soda), and organic solvents (benzene, methanol).

 

b. Solid particle medium processing

- Applications: pneumatic transportation of catalysts and powdered raw materials.

 

II. Reaction and synthesis process

a. High-pressure reactor system

-Applications: high-temperature and high-pressure environments such as polymerization reactions and hydrogenation reactions.

 

b. Catalyst injection and discharge

- Applications: catalyst addition and waste catalyst discharge.

 

III. Separation and purification process

a. Distillation/rectification tower system

- Applications: gas phase condensation at the top of the tower and liquid phase reflux control at the bottom of the tower.

 

b. Extraction and crystallization system

 

IV. Product storage and transportation

a. Tank area management

- Applications: feeding, emptying, and safe discharge of liquid storage tanks.

 

b. Loading and unloading vehicle system

- Applications: tank truck loading and pipeline crane pipe connection.

 

V. Environmental protection and safety system

a. Waste gas treatment (such as SCR/SNCR denitrification, scrubber)

- Applications: neutralization of acidic waste gas (SO₂, NOx), dust filtration.

 

b. Wastewater treatment

- Applications: neutralization and discharge of salt-containing wastewater and organic wastewater.

 

c. Firefighting and emergency system

- Applications: fire water, foam fire extinguishing agent pipelines.

 

VI. Special working condition valves

a. Ultra-low temperature valves

- Applications: storage and transportation of liquid nitrogen (-196℃), liquid oxygen (-183℃).

 

b. Highly toxic medium valves

- Applications: phosgene, chlorine, cyanide pipelines.

 

c. Flammable and explosive medium valves

- Applications: hydrogen, ethylene, liquefied petroleum gas (LPG).