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Filtration mode: the way of filtrate outflow is clear flow filtration and undercurrent filtration.
(2) Washing method: when filter cake needs to be washed, sometimes one-way flow washing and two-way washing, undercurrent one-way washing and two-way washing.
A,Straight flow one-way washing is that the lotion enters from the lotion hole of the thrust plate in turn, passes through the filter cloth and then through the filter cake, and flows out of the filter plate without holes. At this time, the outlet water nozzle of the perforated plate is closed.
The outlet water nozzle of the non-porous plate is in the open state.
B, two-way flow washing is, the wash liquid from both sides of the top of the thrust plate into the hole has been washed twice, that is, the wash liquid first from one side and then from the other side of the wash, the outlet and the inlet of the wash liquid is diagonal
Direction, so also called two-way cross washing.
C, the undercurrent unidirectional flow is polyester, the lotion from the thrust plate into the hole into the perforated plate, through the filter cloth and then through the filter cake, from the hole filter plate.
D, undercurrent two-way washing is the wash liquid from the two sides of the two wash holes above the stop plate has been washed twice, that is, washing from one side first, then from the other side of the wash, the outlet of the wash liquid is diagonal
To, so it is also called undercurrent two-way cross washing.
(3) Press cloth: Press cloth is a main filter medium. The selection and use of press cloth plays a decisive role in the filtration effect. When choosing, it should be selected according to the pH value of the filter material, solid particle size and other factors.
Appropriate press cloth material and aperture to ensure low filtration cost and high filtration efficiency, use, to ensure that the press cloth is flat, no discount, smooth aperture.
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