Material sealed pump design principles and operation and maintenance points 
 In order to master the material sealed pump design principles and operation and maintenance of the main points of this chapter test the use of fluid dynamics - Bernoulli's theorem, discussed the role of wind resistance of the fluid flow and pressure relationships and material sealed pump shaft kiln internal, according to these relationships to explain some phenomena in the production and use of material sealed pump, combined with a lot of testing and production of practical results, summarized clinker smooth trail material sealed pump tube and has the efficient lock Feng ability, truth - material sealed The pump works. 
 Made some small bile simplified the use of Bernoulli's theorem, for some factors, in essence, does not affect the analysis of the internal fluid dynamics of vertical kiln. For example, assume that the shaft kiln operating system is in steady state, the gas temperature and gas composition are constant; calculation does not consider the amount of gas and other raw material decomposition, these simplified to help understanding of these relationships.