Anti-icing system and method for rapid and safe emission of supercritical CO2 power generation system

Abstract

The invention discloses an anti-icing system and method for rapid and safe emission of a supercritical CO2 power generation system. The system involves a frost resistance lubricant storage tank, a frost resistance lubricant injection pump, a frost resistance lubricant buffer tank, a frost resistance lubricant outlet valve, a frost resistance lubricant bypass valve, a CO2 exhaust pipeline inlet check valve, a CO2 exhaust pipeline inlet filter and a CO2 exhaust valve, the frost resistance lubricant can adopt a organic working medium with low freezing point and a low volatile point. The system can monitor the system pressure constantly, the supply of the frost resistance lubricant is guaranteed, it is guaranteed that the frost resistance lubricant is not mixed into the system, when an emergency construction working condition is carried out, due to adoption of the system, throttling components such as a valve and a pipe orifice can be effectively prevented from causing the carbon dioxide to be rapidly subjected to pressure reduction and cooling and generating dry ice so as to block the valve and the pipeline, the rapid discharge of the carbon dioxide is guaranteed, and the valve is prevented from being damaged.

Description

technical field [0001] The invention belongs to the technical field of energy utilization, and in particular relates to an anti-icing system and method for fast and safe discharge of a supercritical CO2 power generation system. Background technique [0002] Under the background of energy shortage and environmental crisis, people pay more and more attention to improving energy efficiency. Among the many thermodynamic cycles, the supercritical Brayton cycle is the most advantageous cycle form. The new supercritical working medium carbon dioxide has inherent advantages such as high energy density, high heat transfer efficiency, and simple system. It can greatly improve the conversion efficiency of heat and power, reduce the volume of equipment, and has high economic efficiency. [0003] However, there are some differences between this type of cycle and the traditional Rankine cycle. The supercritical carbon dioxide Brayton cycle uses carbon dioxide as the working medium inste...

AI Technical Summary

Problems solved by technology

But a characteristic of carbon dioxide makes this valve vulnerable to damage or failure

When the carbon dioxide is suddenly discharged by high pressure and decompression, it will cool down rapidly and produce dry ice. When the temperature of the pipeline drops rapidly, the dry ice will easily adhere to the valve channel and block the valve, so that the valve cannot be closed or closed tightly, or even block the pipeline. Seriously affect the discharge rate

In the system using carbon dioxide, this phenomenon is usually avoided by operation, such as slowly opening the valve and releasing slowly, but this cannot be done when emergency conditions require rapid and large discharge

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