There are many details in the process of biomass boiler work, you can not ignore it, you need to always pay attention to its working status. Once you find anomalies, you need to figure out what happened so that you can avoid some unexpected situations. Next, let’s take a look at the use of biomass boilers.
The water inlet speed before the biomass boiler is started should not be too fast, generally not less than 4h in winter, and 2 ~ 3h in other seasons, especially in the early stage of water harvesting. The feedwater temperature of the biomass boiler is usually 50-90 ° C, so the difference between the feedwater temperature entering the drum and the drum wall temperature does not exceed 40 ° C. For the incomplete biomass boiler after cooling, the inlet water temperature can be comparable to the temperature of the drum wall, otherwise the water inlet speed should be slowed down.
When the feed water enters the steam drum, it always touches the lower part of the steam drum first. If the difference between the feed water temperature and the drum wall temperature is too large, the water inlet speed is fast, and the upper and lower walls, inner and outer walls of the drum will have a large expansion. Bad, causing a lot of additional stress on the steam drum, resulting in deformation of the steam drum, and cracking in severe cases.
Due to the wall thickness of the steam drum, the expansion is slow, and the tube wall connected to the steam drum wall is thinner and expands faster. If the inlet temperature of the biomass boiler is too high or the water inlet speed is too fast, it will cause uneven expansion, cause cracks in the weld, and damage the biomass boiler.
Therefore, during the operation of the biomass boiler, we cannot ignore the problem of excessive water intake, otherwise the impact will be very serious.