What is the general pressure of the gas source in a chemical plant?
The setting of gas source pressure in chemical plants needs to be combined with specific process requirements and equipment characteristics. There are usually the following rules:
1. Base pressure range
The gas source pressure in most chemical plants is concentrated in the range of 5-8 bar. This range can meet the operating needs of most process equipment (such as pneumatic valves, instrument control, material transportation, etc.), while taking into account system safety and economy-too low pressure may lead to insufficient equipment power, and too high pressure may increase pipeline leakage risk and energy consumption.
2. Special process requirements
Some refined or energy-intensive processes may require higher pressures: for example, material transfer in some reaction tanks requires high-pressure gas to accelerate the reaction rate, or long-distance pipe transfers require increased pressure to overcome resistance. Pressure in such scenarios can reach 10-15 bar, but safety needs to be ensured through dedicated compressors and reinforced piping designs.
3. Pressure regulation and stability
In actual operation, the air source pressure needs to be dynamically adjusted through the air storage tank and pressure regulating valve to adapt to fluctuations in air consumption. For example, instrument gas needs to maintain a stable pressure (usually ±0.1 bar), while purge gas can allow a range of pressure changes. Appropriate margin should be reserved when selecting the compressor to avoid affecting production continuity due to insufficient pressure.
use recommendations
When setting the gas source pressure in a chemical plant, it is recommended to comprehensively determine the minimum required pressure of process equipment, pipeline resistance loss and safety margin. Give priority to ensuring the pressure supply of key equipment (such as safety interlock systems), and then optimize the gas efficiency of non-core processes. At the same time, pipe leaks and equipment air consumption are regularly detected to avoid energy waste caused by excessive pressure settings.
In short, the mainstream gas source pressure in chemical plants is 5-8 bar, and the specific value needs to be flexibly adjusted according to process characteristics and system design. The core is to balance equipment demand, safety risks and operating costs.