Solid-Liquid Separating System with Variable Plate Gaps
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing solid-liquid separating systems face challenges in efficiently dehydrating sludge, as equally sized gaps between plates lead to solids being discharged with liquids at the outlet, reducing processing efficiency and increasing the load on raw water tanks.
Innovation Solution
A solid-liquid separating system with a first plate group and a second plate group, where the gaps between plates are narrower at the outlet than at the inlet, allowing for alternate up and down motion of plate surfaces to convey sludge efficiently and prevent solids from leaking, improving dehydration efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If gaps between plates are equally sized at inlet and outlet, then the structure is simple and easy to manufacture, but solids are discharged together with liquids at the outlet side and processing efficiency is reduced
Solution Approach 1:
The patent applies different gap sizes to different locations along the plate structure. Specifically, the gap between plates is made narrower at the outlet side compared to the inlet side. This local variation in gap quality allows the outlet to prevent solid discharge while the inlet maintains adequate flow, resolving the contradiction between manufacturing simplicity and processing efficiency.
2Reliability
If gaps between plates are narrowed at the outlet side, then solids are prevented from flowing out, but the dehydrating rate at the inlet side is lowered
Solution Approach 1:
The patent implements local quality by creating a gradient in gap size along the plate length. The inlet side maintains wider gaps to ensure adequate dehydrating rate and sludge flow, while the outlet side has narrower gaps to prevent solid discharge. This spatial differentiation allows each section to optimize for its specific function.
Solution Approach 2:
The patent employs dynamic plate movement where the upper surfaces of plates in the first and second plate groups are alternately moved up and down in response to circular motion. This dynamic action creates varying pressure zones along the plate length, enhancing dehydration at the inlet while maintaining solid retention at the outlet, thus balancing the contradiction between solid prevention and dehydration rate.
3Productivity
If a press unit is provided to improve dehydration, then dehydration efficiency increases, but more solids tend to flow out through equally sized gaps
Solution Approach 1:
The patent combines a press unit with location-dependent gap sizing. The press unit applies overall pressure to enhance dehydration efficiency, while the narrower gaps specifically at the outlet side counteract the tendency for solids to flow out under pressure. This combination allows high dehydration efficiency to be achieved without sacrificing solid retention.
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
This design effectively prevents solids from leaking at the outlet, enhances pressurization, lowers the moisture content of dehydrated cakes, and increases treatment efficiency by optimizing the dehydration process.
Implementation Method 1
the plates rub with each other during the parallel movement, which can prevent clogging of the filter
Implementation Method 2
a pair of combined plate groups interlock with each other. One of such combined plate groups performs a parallel circular movement, i.e. is displaced side to side and up and down, and conveys the sludge in a longitudinal direction in response to the displacement of the upper surface of the plates
Implementation Method 3
In order to improve a dehydrating ratio, usually, an outlet side is raised, and high pressure is applied to the sludge by gravity
Implementation Method 4
Gaps between the piled plates are narrower at the outlet than those at the inlet. This design effectively prevents solids from leaking at the outlet
Data Source
AI summary
A solid-liquid separating system of a parallel plate conveying type can efficiently dehydrate sludge at an inlet and effectively dehydrate it at an outlet, and assures good solid-liquid separating performance. A filter is constituted by a first plate group and a second plate group which perform the parallel motion and displacement left and right, and up and down on the basis of the circular motion. The first plate group includes a plurality of plates A arranged with predetermined spaces. The second plate group includes a plurality of plates B which are as thick as the plates A, and plates C which are thicker than the plates B. The plates B and C are separated. A press unit (not shown) presses sludge at an outlet, where gaps between plates are narrowed. Even when the sludge is dehydrated by applying pressure, few solids will flow out.