Pressure filter for cross-flow and parallel-flow cross filtering

Abstract

The invention discloses a pressure filter for cross-flow and parallel-flow cross filtering. Filter parts are arranged in the pressure filter, and a filtering chamber is formed between two adjacent filter parts. A primary feed inlet communicated with the filtering chamber is arranged on the filter parts, and the primary feed inlet and the filter parts are located in the same plane. The direction of the primary feed inlet goes along an inner wall of the filtering chamber, and an auxiliary feed inlet is also arranged on the filter parts. The auxiliary feed inlet and the primary feed inlet are arranged at two vertical angles on a diagonal line respectively. According to the invention, the filtering efficiency is improved effectively, and by using hydrodynamic thrust, trapped particles are firstly concentrated to an area with small flow thrust, and large areas for delaying filter cake stacking are preserved, thus keeping the filtering speed almost constant. Meanwhile, because the process of the filter cake stacking is in a dynamic flow state, and conditions such as uneven distribution of coarse particle layers and fine particle layers, undersized particle layers stacking and influence on the filtering speed are changed, the distribution of the coarse particle layers and the fine particle layers is even by adopting the cross-flow process, especially for a sizing agent with high viscosity in the undersized particle layers, the filtering efficiency is increased, and the filtering conditions are improved.

Description

technical field [0001] The invention relates to a filter press. Background technique [0002] The filter press is a machine that applies mechanical force on one side of the filter medium to achieve filtration. It is divided into horizontal, box filter presses, plate and frame filter presses, vertical filter presses, belt filter presses, etc. The structure of the filter press consists of three parts: the frame, the pressing mechanism and the filtering mechanism. Take the chamber filter press as an example: [0003] The frame includes: (a) Thrust plate: It is connected with the support to place one end of the filter press on the foundation. The thrust plate of the van filter press is provided with feed holes, mostly middle feed holes (also Other positions), there are four holes in the four corners, the holes in the upper two corners are the inlet of washing liquid or squeezed gas (it can also be used as the outlet of filtrate during the filtration period), and the lower two ...

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a filter press with cross-flow and cross-flow filtration, which can effectively solve the problem that the filter press adopts filter cake layer filtration, the filtration speed is slowed down, and the granular layer of the filter cake layer is unevenly distributed, resulting in difficulty in filtration. Prolonged time, the problem of increased filter pressure

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