Emergency Plan to Prevent the Introduction of Concentrated Ammonia Solution into the Main Ammonia Gas Pipeline

Thread Content

Emergency Plan to Prevent Concentrated Ammonia Solution from Entering the Main Ammonia Gas Pipeline I. Reasons for liquid entry: 1. Excessive negative pressure draws ammonia solution from the ammonia absorption intensifier into the main ammonia gas pipeline. 2. The outlet valve of the ammonia suction pump was opened too rapidly, preventing an effective vacuum from being established in the cone section of the ammonia suction unit. 3. The central tube of the high-position ammoniaator is cracked, causing liquid to take a shortcut; the nozzle tube in the conical section is damaged, resulting in poor vacuum level. 4. The inlet valve of the absorption cooling exhaust pipe is not open or has fallen off, and the exhaust pipe is blocked and not unobstructed. II. Emergency measures: 1. Immediately close the outlet valve of the absorption pump, and open the drain valve at the main ammonia gas pipeline to discharge water. 2. Contact the on-duty supervisor of the chiller workshop and the dispatcher promptly. 3. Identify the cause of the liquid leakage; if it is a equipment issue, switch the pump immediately and consult a mechanic for repairs. III. Preventive measures: 1. During absorption operations, the valves must be carefully checked to prevent accidental opening or closing. Frequently check the temperature of each layer of the coiled tubes by touch to determine whether there is any blockage in them; also, control the concentration of ammonia solution and the CO2 level appropriately to prevent crystallization from causing blockages in the coiled tubes. 2. The outlet valve of the pump should be opened slowly; it is best to open it in stages in a gradual manner. 3. Regularly inspect the high-position ammonia absorber; you can feel the temperatures of the reaction area and the air intake area of the absorber with your hand. 4. It is strictly prohibited to absorb with negative pressure in the main ammonia pipeline.