The compressor does not have hard metal into the compressor body, and the compressor appears to be locked. What is the cause? We conducted detailed analysis with the compressor manufacturer's technicians and determined that the compressor rotor burst due to liquid hammer. And caused by it. Subsequently, measures were taken to add water-cooled units to the circulating water tank, and the softener was added to the circulating water after the scale was completely removed. After these measures were implemented, the temperature was restored to normal.
(1) It can be seen from the phenomenon that the lubricating oil appears after the failure of the compressor that the lubricating oil cannot be quickly returned to the compressor separator because a large amount of propane liquid enters the compressor unit after opening the compressor inlet valve. After the compressor is started, the lubricating oil enters the compressor, and the propane liquid partially vaporizes to form a gas to block the lubricating oil passage; the lubricating oil temperature in the lubricating oil separator drops and frost appears on the mirror within 6 hours, and it can be seen that there is a large amount of The liquid enters the compressor separator and the lubricating oil is cooled from 25 ° C to -3 ° C.
(2) It can be seen from the flow chart of the propane system that the propane system is a complicated cycle system. After the propane compressor is stopped, there is a large amount of propane gas in the system. When the compressor is stopped, the ambient temperature is 15 ° C. The ambient temperature during driving was -3 ° C, and the ambient temperature dropped by 18 ° C in 2 days, causing a large amount of propane gas to become liquid in the system piping.
(3) Due to the adverse effects of liquid on the screw compressor during the design and construction of the system, multiple U-shaped tubes appear at the inlet of the compressor. When the U-shaped tube is collected, the pressure drops. More gas flows there, causing a large amount of liquid to concentrate in the U-shaped pipe section during the shutdown process.
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