Reciprocating compressor and surge problems
Thread Content
Our factory uses M-type counterbalanced compressors with six rows and four stages, produced by Shenyang Gas Turbine. The design pressure for each row is: 0.16 for the first row, 0.5 for the second row, 0.16 for the third row, and 2.5 for the fourth row. The unit is equipped with control valves for the first/first stage and the fourth/third stage. Recently, in an effort to reduce energy consumption, it was found that during operation the valve for the first/first stage was opened wide, causing the pressure in that stage to drop to 0.12. Efforts were made to close the valve for the fourth/third stage; at that point the pressure in that stage reached 2.3. We are wondering whether such operation is correct. Apart from the compression ratio exceeding the designed value, could this lead to surge? ? ? Seeking advice from experts! ! !
Is there no clearance adjustment for section 1 and no inlet vent?
How was it designed that the pressure of the three rows became 0.16? When it comes to energy conservation and cost reduction in production, is the goal to reduce the overall production load, or merely to lower the electricity consumption of compressors through operational optimizations? I wonder what your inhalation pressure is? If I work backwards using the compression ratios of the first three stages, the intake pressure is 0.05. Given that the final stage compression ratio in the compressor’s original design is relatively low, it is theoretically more economical and energy-efficient to increase the intake pressure from 0.05 to 2.5 through four stages, with each stage having a compression ratio of around 2.7. But no matter what the approach, it is still advisable to consult the compressor manufacturer.
Given the current hardware configuration, the principle of energy saving is to reduce backflow, as backflow represents energy waste; the approach is to adjust the ratio of one to one first, and then adjust it to one to four.
According to the operational requirements, adjust the ratio of one to four appropriately; the key is to ensure that the inlet air volume remains stable, after which overall operational adjustments can be made using the ratio of four to one
Reducing the flow rate each time lowers energy consumption; in a four-time cycle approach, the gas supply pressure or flow rate is generally controlled