Filter press

Abstract

The invention provides a filter press. The filter press comprises a left frame, a right frame, a crossbeam, a hold-down device, a filter board assembly, an extruding device, a feeding device, a hold-down board, a head board and a thrust board, wherein the filter board assembly is provided with a piston board, and the piston board is movably arranged in the filter board assembly. Preferably, the side, facing the filter board assembly, of the head board is provided with an elastic device, and the unfixed end of the elastic device contacts with the piston board arranged in the filter board assembly. The filter press enables time for press filtration to be greatly shortened, improves press filtration efficiency and reduces energy consumption; meanwhile, since a locking device is used and the hold-down device does not need to be always held down in the process of press filtration, energy consumption is further reduced.

Description

technical field [0001] The invention relates to a filter press. Background technique [0002] Filter press is a commonly used solid-liquid separation equipment. It was used in chemical production in the early 18th century and is still widely used in chemical, pharmaceutical, metallurgy, dyestuff, food, brewing, ceramics and environmental protection industries. As a mature dehydration equipment, filter press is widely used in the field of environmental protection and has become an important equipment for sewage sludge treatment. [0003] The general domestic sludge treatment method adopts mechanical dehydration with high molecular polymers, usually after conditioning treatment. There are many methods for conditioning, including thermophysical methods, such as thermal hydrolysis, hydrothermal drying, wet oxidation, etc. There are physical methods, such as ultrasonic waves, microwaves, etc., and the most common ones are chemical methods. By adding certain inorganic chemical sa...

AI Technical Summary

Problems solved by technology

[0010] However, sludge has complex components, low relative density, fine particles, and is often in a colloidal state, which determines its characteristics that it is not easy to dehydrate. The current filter press will need to filter the material liquid under the pressure of the feed pump. When it is sent to each filter chamber, it takes a long time to pump continuously to remove the filtrate and press it into a filter cake, which takes a long time and consumes a lot of energy

During the filtration process, the compression device always needs to compress the filter frame and filter plate, which increases the energy consumption

How to solve the shortcomings of long time-consuming and high energy consumption of the filter press is a major issue facing the industry

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