Pre-separator Module with Wet Coarse Filter for Aerosol Separation
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Solution Overview
Problem
Existing separators in the metal processing industry, particularly in MQL applications, face challenges in achieving high deposition rates while maintaining cost-effectiveness due to the high expense of main filter elements like coalescence and HEPA filters, which are prone to clogging and have limited service life.
Innovation Solution
Incorporating a pre-separator stage with a coarse filter from the 'Coarse' or 'ePM10' group, combined with a spray device that directly wets the filter with liquid, significantly improving separation efficiency by capturing solid and aerosol particles before they reach the main separator stage, thus extending the service life of the main filter elements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If main filter elements (coalescence and HEPA filters) are used to achieve high separation rates, then separation efficiency is improved, but service life is reduced due to clogging
Solution Approach 1:
The separator is divided into multiple stages: a pre-separator stage with a coarse pre-filter and a main separator stage with fine filter elements. This segmentation allows the pre-filter to handle coarse particles and the main filters to focus on fine particles, extending service life while maintaining separation efficiency.
Solution Approach 2:
The pre-filter performs preliminary separation of coarse particles before the gas enters the main separator stage. This preliminary action protects the expensive main filter elements from clogging by removing larger particles that would quickly block them.
2Duration of action of stationary object
If a pre-filter is added upstream of the coarsest filter, then service life of main filters is extended, but device complexity increases
Solution Approach 1:
The pre-filter and spray device are combined into an integrated pre-separator module that can be easily installed and removed. This merging reduces overall system complexity compared to having separate components while still providing the protective function.
Solution Approach 2:
The pre-filter is designed as a disposable or easily replaceable component with lower cost. By using a cheaper filter element for the pre-separation function, the overall system complexity is reduced while achieving the goal of protecting expensive main filters.
3Manufacturing precision
If the pre-filter is wetted with liquid to improve particle capture, then separation efficiency is improved, but risk of clogging increases
Solution Approach 1:
A spray device is used to wet the pre-filter with liquid, improving the capture of solid and aerosol particles through liquid bridging and adhesion. The hydraulic spray system enables efficient particle capture while the liquid can be managed to prevent excessive clogging.
Solution Approach 2:
The physical state of the pre-filter is changed from dry to wet by applying liquid. This parameter change significantly improves particle capture efficiency by enhancing adhesion forces, while the amount and type of liquid can be controlled to balance performance and clogging risk.
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 pre-separator stage enhances the separation of aerosols and solid particles, reducing the load on main filter elements, thereby extending their service life and improving the overall separation efficiency and cost-effectiveness of the separator system.
Implementation Method 1
spraying the pre-filter with liquid, thereby improving the separation of solid and aerosol particles from the raw gas
Implementation Method 2
spray device for spraying the pre-filter with liquid
Implementation Method 3
pre-separator stage with a coarse filter from the 'Coarse' or 'ePM10' group, combined with a spray device that directly wets the filter with liquid
Implementation Method 4
The first two filters are typically coalescing filters
Implementation Method 5
A HEPA filter is specifically described for separating the finest particles
Implementation Method 6
The oil dripping from the coalescing filter is collected in a container at the bottom of the housing and serves as a fluid to humidify the raw gas. It is injected by means of a pump via pipes into the inlet chamber
Implementation Method 7
The higher humidity is intended to ensure that the oil to be separated is more easily deposited on the coalescing filter
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
The invention relates to a separator (1) for separating a liquid from a raw gas, having a housing (2) with an inlet (10) for the raw gas and an outlet (11) for clean gas, a main separator stage (3) with at least one main filter element (3-1, 3-2, 3-3), a pre-separator stage (5) which is connected upstream of the main separator stage (3), said main separator stage (3) and pre-separator stage (5) being arranged between the inlet (10) and the outlet (11) in the flow path, a liquid reservoir (F), and a spray device (4) for drawing and spraying liquid out of the liquid reservoir (F). The pre-separator stage (5) has a filter (6) of the filter group "coarse" or "ePM10" in accordance with ISO 16890-1 :2017-08, and the spray device (4) is designed to spray the filter (6) with liquid. The invention additionally relates to a pre-separator stage (5) designed as a module which can be inserted into and removed from the separator (1), to a method for retrofitting a separator, and to a method for operating the separator.