In the petrochemical production process, many physical and chemical processes, mass transfer and heat transfer unit operations need to be experienced, and some process control conditions are extremely harsh, such as high temperature, high pressure, low temperature, vacuum, etc.

Due to the wide variety of chemical industries, complex processes and diverse products, there are many kinds, large quantities and high toxicity of pollutants discharged in production.

Gas is the general term of gas fuel. It can burn and release heat for residents and industrial enterprises. There are many kinds of gas, mainly natural gas, artificial gas, liquefied petroleum gas, biogas and coal to gas.

HVAC is an integral part of the building. Including: heating, ventilation and air conditioning.

Water conservancy project is a project built to control and allocate natural surface water and groundwater and achieve the purpose of eliminating harm and promoting benefit. Also known as water engineering.

Metallurgical industry refers to the industrial sector that mines, selects and sinters metal ores, smelts and processes them into metal materials.

Power plant, also known as power station, is a factory that converts all kinds of primary energy contained in nature into electric energy (secondary energy).

Energy industry, also known as fuel power industry, refers to the industrial production department that develops and utilizes various energy resources in nature and transforms them into secondary energy.