Please give advice from sulfuric acid technical experts on what matters should be paid attention to during winter production. Please give detailed answers. Thanks

This post was last edited by Chunzhi on 2014-1-3 10:04 Sulfuric acid plants in the north should pay attention to prevent the finished acid from freezing and blocking equipment and pipelines. The insulation of the sampling acid pipeline should also be checked to prevent blockage.

Many factories change the sulfuric acid concentration of their products from 98% (crystallization temperature -0.7 degrees) to 93% (crystallization temperature -27 degrees) in winter. Prevent sulfuric acid freeze blockage

In addition to what the moderator said, there are also backup pumps and cooling water pipes that must be drained and turned on when needed, or the water must be kept flowing to prevent freezing of pipes and equipment.； In the north, we should also pay attention to the freezing problem of cooling water towers

1. Mainly to prevent freezing and sulfuric acid crystallization. In the north, 93% acid is generally produced in winter. To produce 98% acid, insulation must be done well. 2. All cooling water and circulating water must be kept in circulation, and spare pumps and pipes must be drained. 3. When switching pumps, pay attention to changes caused by temperature differences.

The main reason is antifreeze. We parked for a long time at more than minus 30 degrees Celsius, and the equipment had a long flow of water, which also froze the cooling water heat exchanger of the anode protection and the fan. The reason was that the water flow was small, the drain pipe was not full of water, and the water pipes slowly froze and frozen.

Yes, we also have lessons in this regard. The cooling water heat exchangers of the two fans were all scrapped. Fortunately, they were discovered early. If they had to wait until they were driving, it would be too late.

Mainly anti-freeze 1. Due to the 98% crystallization temperature of -0.7 degrees, it prevents sulfuric acid crystallization. Generally, 93% is produced. To produce 98% acid, heat preservation must be done. 2. All cooling water and circulating water must be kept flowing, and spare pumps and pipes must be drained. It is best to have electric heat tracing. 3. Take anti-freezing measures such as thermal insulation, preferably electric heating, etc. for the boiler roasting furnace’s positioning and discharge valves, water level gauges, pressure gauges and other pipes. 4. Prevent freezing in the cooling water tower. If abnormal vibrations are found, stop the machine in time for de-icing to prevent damage to the equipment. 5. Clean up the ice and snow in high places, eaves, etc., and on ladder platforms in a timely manner to prevent people from being injured by slipping or falling.