Supercritical CO2 pump

Carbon dioxide is a gas at room temperature and pressure, but it enters a supercritical state when the temperature exceeds 31 degrees Celsius and the pressure exceeds 7.4 megapascals. At this point, carbon dioxide is neither as loose as a gas nor as viscous as a liquid, but combines the characteristics of both: its density is close to that of a liquid, and its fluidity is close to that of a gas. This unique physical property makes it an efficient medium for heat transfer and work, widely used in fields such as power generation, chemical engineering, and refrigeration.

Supercritical CO2 pumpThe core task is to pressurize liquid or gaseous carbon dioxide to a supercritical state and stably transport it to a designated location. This process may seem simple, but it actually faces multiple challenges: the high-pressure environment of supercritical carbon dioxide imposes strict requirements on the strength of equipment materials; Its low viscosity characteristics are prone to leakage; Small fluctuations in temperature and pressure may lead to sudden changes in state, affecting system stability.

Supercritical CO2 pumpofCore components:

1. High pressure pump body
Usually, multi-stage centrifugal pumps or reciprocating piston pumps are used. Centrifugal pumps are suitable for high flow scenarios, such as power generation systems; Piston pumps are used in chemical processes that require precise pressure control.

2. Pressure resistant sealing system
Due to the working pressure reaching over 20 megapascals, the pump body is made of high-strength alloy steel, and the seals are made of silicon carbide or ceramic materials to prevent the leakage of supercritical carbon dioxide.

3. Intelligent control system
Real time monitoring of pressure, temperature, and flow parameters, automatic adjustment of pump speed or valve opening to ensure that carbon dioxide is always in a supercritical state.