Where is the bottom blow down located in a water tube boiler?

The bottom blow down in a water tube boiler is indeed located in the lowest part of the combustion chamber. This is critical for the maintenance and efficient operation of the boiler. The bottom blow down valve allows for the removal of sediment, sludge, and impurities that settle at the bottom of the boiler during operation. By placing the blow down in the lowest section, operators can effectively remove these contaminants, which is essential for maintaining water quality and preventing issues such as corrosion or boiler efficiency loss.

In comparison, options related to the top of the steam header, the upper part of the combustion chamber, or near the water inlet do not serve the function of removing sediments. Each of these other locations would not be effective for draining impurities and maintaining the health of the boiler system. The bottom position ensures proper drainage, highlighting the importance of placing the blow down in an area where it can be most beneficial for the overall operation of the boiler.