Slag lock hopper slag collection temperature issue!

If it occurs regularly, it’s probably not due to poor slag removal; it’s impossible for issues to arise every time after a certain period of slag removal. The heat source for slag collection and the heat dissipation of the hopper body should be dynamic: when the incoming heat energy is higher than the amount of heat dissipated, the temperature rises; otherwise, it drops. At the beginning of slag collection, due to the accumulation of slag in the furnace during the slag discharge period, a large amount of slag is discharged, which causes the temperature to rise. Afterwards, as the amount of slag decreases, the temperature drops. Once slag collection stabilizes and the slag discharge rate becomes regular, the temperature rises again. I wonder, in the process of the amount of slag decreasing, is there a phase where the slag level gradually falls below the normal level?

I agree with you, but personally I feel that the temperature trends of the two thermometers in this lockbox change differently throughout the slag collection process, especially for the one at the bottom. At first, when hot slag falls in, it releases heat and causes the temperature to rise; once that heat is released, both the slag and water at the bottom end up in a zone without any heat source, so the temperature naturally drops. The temperature trend of the thermometer at the top should be more complex. I guess what the original poster is referring to is the temperature at the top!

The thermometer’s response time also needs to be taken into account.

Find out the locations of the two temperature points. After slag discharge is completed, the water added to the lockhopper is low-pressure ash water, and the temperatures detected by the two thermocouples correspond to that of the low-pressure ash water. The pump in the lockhopper facilitates self-circulation. As slag begins to accumulate within the system, the temperature rises due to the accumulation of slag in the furnace. As the slag accumulation continues, the low-pressure ash water in the lockhopper is continuously pumped upward via the pump into the upper part of the slag crusher, causing the temperature of the water below the entire slag crusher to drop. Once a temperature equilibrium is reached, the temperature of the entire lockhopper then rises slowly. If you have time, it would be useful to check the temperature at the location of the slag crusher; there might be a change of around 1°, or even less, considering the heat transfer characteristics of the equipment