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Through the filter screen, the process of the process is carried out through the outlet, and the particles in the water are trapped inside the filter. So continuously circulation, more and more particles trapped down, filtration speed slower and slower, and imports of sewage is still continue to enter, filter hole will be more and more small, thus produce pressure difference between inlet and outlet, when poor magnanimous to set data, differential pressure transmitter will be routed to the controller, control system startup drive motor through the mechanical drive shaft rotation, open the outlet at the same time, by the discharge outlet, when the screen is clean, differential pressure drop to the minimum, the system returns to the initial filter, normal operation of system
However, science and technology are two different social cultures, and the differences between them are obvious. The basic task of science is to know the world and find it, thus increasing the intellectual wealth of mankind. The basic task of technology is to discover the world and invent it to create the material wealth of mankind and enrich the spiritual and cultural life of human society. Science answers questions about "what" and "why"; The technology answers the question "what to do" and "how to do". Therefore, the results of science and technology are different in form. Scientific achievements are generally expressed as concepts, laws, papers and other forms. The technical results are usually in the form of process flow, design drawing, operation method and so on. Scientific products are generally not commercial and technological achievements can be commoditized. Modern technology has a strong utilitarian and commercial color.
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