Filtering method of sodium bichromate carbonizing liquid
A filtration method and a technology of sodium red alum, which are applied in chemical instruments and methods, filtration separation, separation methods, etc., can solve the problems of unqualified quality of carbonized liquid and lower quality of sodium red alum, and achieve reduced chromium content, short unloading time, and good The effect of the filter effect
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[0017] In a specific embodiment, the present invention specifically provides the following technical solutions:
[0018] First, the pressurized sodium red alum carbonized liquid enters the improved vertical plate and frame filter press through the feed pipe. The improvement of the vertical plate and frame filter press mainly lies in the addition of a pressure regulating valve, which prevents the carbonized liquid from backflowing and reduces the filtration efficiency when the pressure is released by the filter press. Under the control of the filtrate pressure regulating valve, the filtration process is always maintained at a predetermined pressure. When the pressure in the vertical plate and frame filter press exceeds the predetermined pressure, the filtrate flows to the filtrate storage tank through the filtrate output pipe; when the pressure at the inlet end rises, the feed regulating valve set on the feed pipe is automatically closed, and the setting The filtrate pressure ...
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