Filter Press Dual Drain Holes Backflushing
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Solution Overview
Problem
Current high-efficiency filter presses fail to achieve ideal filtration effects, resulting in low-purity filter cakes and inadequate filtrate recovery, which do not meet the increasing material filtering requirements in the solid-liquid separation industry.
Innovation Solution
A high-efficiency filter press design featuring a filter plate with dual drain holes, a washing device for backflushing, and an air drying system, controlled by a PLC, to enhance filtrate collection and filter cake purity through separate drainage and backflushing mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a single drain hole is used in the filter plate, then the device structure is simple, but the filtrate recovery rate is low and filter cake purity is insufficient
Solution Approach 1:
The filter plate is segmented into multiple functional zones with separate drain holes: a first drain hole for collecting filtrate from the first filter plate, a second drain hole for collecting filtrate from the second filter plate, and a third drain hole for backflushing. This segmentation allows independent collection and processing of filtrate from different filter plates, improving both filtrate recovery rate and filter cake purity while maintaining manageable structural complexity.
Solution Approach 2:
A washing device is introduced as an intermediary component that uses the third drain hole to inject washing water for backflushing the filter cake. This intermediary mechanism enables effective removal of residual filtrate and impurities from the filter cake, thereby improving filter cake purity without complicating the core filtration structure.
2Manufacturing precision
If traditional filtration method is used, then the operation is simple, but the filter cake purity is low and filtering effect is poor
Solution Approach 1:
The filtration system is divided into distinct functional modules: a filtration module with first and second filter plates for solid-liquid separation, a drainage module with separate drain holes for filtrate collection, and a backflushing module with a washing device. This modular segmentation enables precise control over the filtration process, ensuring high filter cake purity through dedicated filtration zones and independent backflushing capability.
Solution Approach 2:
The washing device implements reverse flow backflushing by injecting washing water through the third drain hole in the opposite direction of normal filtrate flow. This inversion of flow direction effectively removes residual filtrate and impurities from the filter cake, significantly improving filter cake purity while adding only minimal system complexity.
3Productivity
If filtrate from multiple filter plates is collected together, then the device is simple, but the filtrate recovery rate and purity are insufficient
Solution Approach 1:
The drainage system is segmented into multiple independent drain holes: a first drain hole connected to the first filter plate, a second drain hole connected to the second filter plate, and a third drain hole for backflushing. Each drain hole can independently collect and discharge filtrate from its corresponding filter plate, enabling separate recovery and processing of filtrate streams, thereby improving overall filtrate recovery rate and purity.
Solution Approach 2:
The filter plate structure is designed with multi-functionality, serving both as a filtration surface and as a collection manifold for multiple drain holes. The same filter plate structure facilitates both normal filtration through the first and second drain holes and backflushing through the third drain hole, achieving multiple functions without proportionally increasing device complexity.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The design significantly improves filter cake purity and filtrate recovery rates, leading to enhanced filtration efficiency and meeting user requirements by allowing separate discharge of filtrates and effective backflushing of the filter cake.
Implementation Method 1
a washing device, wherein the washing device is configured to inject washing water into the first drain hole to allow the washing water to flow out from the second drain hole to the filtrate pool after flowing through the filter plate
Implementation Method 2
an air drying device configured to inject an air flow into the first drain hole to blow the residual filtrate in the filter plate out from the second drain hole
Implementation Method 3
materials enter the filter chamber through a central feed hole of the filter plate, particles in the materials are intercepted by the filter cloth installed in the filter chamber to form a filter cake, and the filtrate is discharged from drain holes at four corners of the filter plate, thereby achieving the solid-liquid separation
Data Source
AI summary
A high-efficiency filter press includes a filter plate for solid-liquid separation, a material pool for storing materials and transporting the materials to the filter plate, and a filtrate pool for storing filtrate flowing out of the filter plate, wherein the filter plate is provided with a feed hole, a first drain hole and a second drain hole, the material pool is in communication with the feed hole through a feed pipe, the first drain hole is in communication with the filtrate pool through a first drain pipe, the second drain hole is in communication with the filtrate pool through a second drain pipe. The filter press further includes a washing device which is configured to inject washing water into the first drain hole to allow the washing water to flow out from the second drain hole into the filtrate pool after flowing through the filter plate.