1. Waste a lot of heat and affect the stability of heating steam pressure.

2. It is unfavorable to the boiler water in the biomass boiler.

3. The spool and stem packing loss of the sewage valve is large, and the leakage and pipe burst phenomenon increase.

4. According to relevant statistics, the thermal efficiency of a boiler is 60%. When the pressure rises to 1MPa, every additional blowdown wastes energy about 0.2%; when the pressure rises to 1.25MPa, every additional blowdown wastes energy 0.5%. % Or so, if the pollution discharge rate is raised to about 20%, energy waste will be relatively large.

5. The labor load of boiler operators has increased.