With the state on the improvement of environmental standards and the utilization of fly ash enhanced awareness of the power to change the hydraulic ash to dry out the gray has become the current trend. I plant development and production of material sealed pump, with the wind to drive down, simple operation, small amount of maintenance and so on, are widely used in electric power, aluminum, cement, chemical industry, material sealed pump is the ideal equipment to transport all kinds of dust materials. 

 Design ash points, damage to the sump pumps, water had rushed to the sediment pool, resulting in slag water is not enough, water shortages, due to the ash fineness small, likely to cause network blockage, valves, slurry pump pipe junction masonry scrap, slag system has suffered serious losses. Vacuum conveying wear lighter, but the fan a few years later as the wind decreased, resulting in gray to send less than the phenomenon. The case of the same structure, within a certain range, increasing the air volume of the see opportunities will improve the ability of the transportation of materials ---- according to the conditions offered, duct diameter unchanged, apparently to increase the air flow is accomplished by increasing the tube wind speed , wind speed, the same with the concentration of material circumstances, naturally increase the transmission capacity of the material per unit time. The advantages of using the material sealed pump a small investment in equipment, material sealed pumps can replace two sump pumps, reducing equipment investment. 2, the gas pressure of the feed pump closure for 0.04Mpa-0.1Mpa, reducing the supply pressure, save gas consumption, while reducing the motor power. 3, lower maintenance costs. The system once the installation and commissioning into operation, the basic need to operate, virtually no maintenance, maintenance workers only need to regularly check can. 4, the low pressure transport equipment sealing and reliable operation, plugging phenomenon, environmental outlook has been improved. Structure and working principle of material sealed pump by the diffusion chamber, pump, and activities of the duct, the executing agency, and other parts of the composition. Low pressure air inlet pipe, pump, into the diffusion chamber. High-speed air flow through the pump nozzle surrounding material gasification, the nozzle air flow into the diffusion chamber to form a partial vacuum in the nozzle and the diffusion chamber and the gasification material inhaled conveying pipe, the high-speed air flow to enhance the discharge point. Xiaoyi Fu into the seal material pump not only wind down and the small size, covers an area of ??savings for you at the same time, save money, transportation media: cement, raw materials, coal, fly ash and other powdered materials. 

 First, an overview 
 Rich into a low-pressure pneumatic conveying equipment, material sealed pump products, the introduction of foreign advanced technology on the basis of the domestic industry, different types of pneumatic conveying equipment exist various problems to develop a new type of low-pressure pneumatic pump equipment. 
 The material sealed pumps are widely used in thermal power plants, thermal power plant pneumatic ash handling system, water conservancy and hydropower construction sites and city commercial concrete mixing plant, mixing the powder in the station in material handling, cement homogenization and down the library, a variety of powdered materials the delivery, as well as the industries of metallurgy, chemicals, building materials, docks and other powdery material handling, transshipment process. Into a series of rich low-pressure pneumatic conveying equipment, material sealed pump has been successfully used in many powder project is one of the best powdered materials in pneumatic conveying equipment. 

 Two works and structural characteristics 
 The low-pressure pneumatic conveying equipment, material sealed pump gas beat the difference principle with the jet stream technology, the combination of fluidization technology, to fully absorb the theory of modern pneumatic conveying, after years of running the practice summary for the powder pneumatic conveying process system, a large number of requirements continuous transport and the development of special equipment. Equipment and other pneumatic conveying equipment as compared to the warehouse-style pump has the following characteristics: (1) simple structure, reliable operation. Wear a small, long service life. Arrangement convenient and flexible. Sealed, non-polluting transportation to meet their own environmental and engineering requirements on the quality of the input material. transportation stability of 6. simple operation 7. on the quality not ask for much of the gas source. system reliability 9. reasonable economy, low cost, and system operating costs low. 


 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.