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Safety Operating Procedures for PAS Decarburization Position

2009-03-08View Original

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Safety Operating Procedures for Decarbonization Tasks: 1. Turn on and off the computer in accordance with the established procedures; do not pull the power supply forcefully. Under normal production conditions in a system where the computer is connected to a PLC, it is strictly prohibited to modify the Citect operating procedure. II. In the event of a sudden power outage, first turn off the PLC power supply or the main power supply, then close the outlet flow valve, the inlet valve of the vacuum pump and its water supply valve. After that, close the inlet and outlet valves of the compressor, and open the circuit valve; pay attention to the pressure in the negative pressure tower ; Check conditions such as whether the hydraulic valve is closed, to prevent situations where the valve cannot be fully closed, or where carbonized NH3 water leaks in, or high pressure penetrates into low pressure areas. III. Before starting the machine upon receiving a call, it is necessary to carefully check the status of all valves and switches, ensure that all equipment is in a ready state for operation, and use a computer to verify that the pressures in each tower match the current values. If necessary, be sure to relieve pressure and identify the problem before driving again. When starting a vacuum pump, open valve V7 first, ensure equilibrium on both sides of the vacuum pump, and then close valve V7. IV. All manually operated valves must be closed by clicking when switching to interlocked operation, to prevent accidents during system shutdown. V. Adjust the various time and outlet flow valves in a predictive manner; avoid sudden increases or decreases in flow. The adsorption time per cycle should be adjusted to ≤50 seconds, thereby ensuring stable production and improving the recovery rate of product gas. VI. During normal operation of the system, it is strictly prohibited to open the drain valves on any pipelines where negative pressure may occur, in order to prevent air from entering the system and causing accidents; when the system is shut down for an extended period, all negative-pressure towers must have their pressure adjusted to positive pressure. VII. The soda separator should be drained of waste fluid in a timely manner; if this cannot be done promptly and the liquid level becomes too high, the system should be shut down urgently. If the carbon dioxide output exceeds the specified levels, measures such as reducing the flow rate or increasing the operation of vacuum pumps should be taken immediately. The cause of the problem must be identified and resolved before the gas can be sent to the subsequent processing stages.

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