Generally it includes steam drum and Mud Drum.
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However, under normal circumstances, the vacuum pump exhaust hole injection for two reasons:
　　
(I) excessive vacuum refueling, resulting in the vacuum pump vacuum oil discharged with the exhaust port.
　　
⑵ sealed solvent is too large, the choice of vacuum pump suction rate is too small.
　　
With the continuous expansion of vacuum technology in various fields of application, the demand for direct-coupled rotary vane pumps has been increasing. Due to the large number of pumps, large processing and assembly workload, the price is very low, so some foreign vacuum manufacturers in China to establish a professional factory. Domestic small and medium-sized direct-coupled rotary vane pump technology has been passed, the price is far cheaper than foreign pumps, so domestic pump still has a competitive advantage, the key is to solve the shaft seal oil leakage and vacuum pump oil performance and quality issues , To ensure that the direct pump in the high-speed, high temperature performance and reliable operation, but also to further improve the domestic direct-coupled rotary vane pump the ability to extract water vapor.
Boiler steam drum acts as reservoir which provides necessary head for circulation of water through evaporation zone. Boiler steam drum has own feed water storage capacity it change according to the design of plant requirement.
Analysis of the reasons for vacuum pump exhaust injection
Vacuum pump is a rotary varactor, the vacuum pump to be used before the pump can be used in a wide range of pressure over a larger pumping speed, the gas is not extracted with dust and water vapor is widely used in metallurgy , Chemical industry, food, electronic coating and other industries.