Wall-flow filtration technology
From first-generation imported metal candle elements and second-generation imported ceramic candles to our proprietary high-precision wall-flow system — an efficiency leap driven by structure.
Why the element had to be redesigned
Surface filtration on a cylindrical candle makes it difficult to balance filtration area against structural life at high flow rates, high dust loading, elevated temperature or in corrosive atmospheres. SEPARATION approached the problem through channel geometry rather than material substitution alone — resulting in a third generation of technology.
Our R&D team brings together senior Chinese and German filtration specialists with more than 30 years of combined industry experience. That focus is what gives wall-flow filtration its safer, more reliable and better-rounded performance.
- GEN 01
Imported metal candle systems
Surface filtration with metal media; limited by high temperature and corrosive atmospheres.
- GEN 02
Imported ceramic candle systems
Better temperature and corrosion resistance, but the cylindrical geometry still suffers direct impingement and low packing density.
- GEN 03
SEPARATION high-precision wall-flow system
Alternately plugged parallel channels, a cyclonic inlet and patented online back-blowing — area, life and continuity together.
Parallel channels, an order-of-magnitude area gain
Each wall-flow element provides a matrix of parallel filtration channels. Per unit volume it delivers 8–10× the filtration area — the starting point for every engineering advantage that follows.
Conventional candle element
CONVENTIONALWall-flow SiC element
WALL-FLOW SiCThree design choices behind long-cycle operation
Cyclonic inlet
A metal frame keeps dust-laden gas from impinging directly on the element. Swirl flow distributes it into the channels, removing the erosion and fracture mechanism at its source and protecting process continuity.
Alternately plugged channels
Parallel channels are plugged in an alternating pattern, forcing wall-flow filtration. Filtration area per unit volume rises 8–10×, so high-flow systems are more compact with simpler piping.
Patented online back-blowing
Automated sequences run filtration and cleaning simultaneously. The patented technology is proven in over a thousand systems and, with high-precision SiC elements, enables long campaigns without shutdown.
From inlet to continuous output
Filtration is not an isolated equipment action. It is a continuous process of flow distribution, wall-flow separation, online cleaning and clean-gas discharge.
Dust-laden gas enters
Process gas enters the filtration module and is distributed evenly at the design flow rate.
Cyclonic distribution
Swirl flow guides gas into the channels without direct impingement on the element.
Wall-flow separation
Alternately plugged channels deliver high-precision gas-solid separation; dust is retained on the wall.
Online pulse cleaning
Automated back-blowing removes the dust cake, which falls into the hopper.
Continuous clean gas
Filtration and cleaning run in parallel, keeping the system stable over long campaigns.
The advantages, side by side
| Criterion | Conventional candle filter system | SEPARATION wall-flow system |
|---|---|---|
| Filtration mechanism | Outer-surface filtration | Alternately plugged parallel channels, wall-flow |
| Area per unit volume | Limited by cylinder surface | 8–10× higher |
| Inlet arrangement | Dust-laden gas impinges directly | Cyclonic entry, protected by a metal frame; no direct impingement |
| Element life | Risk of erosion and fracture | More than 2× longer |
| Operating continuity | Requires shutdown for replacement and maintenance | Continuous online filtration with automated cleaning |
| Footprint & piping | Large equipment at high flow rates | Compact system, smaller footprint, simpler piping |
| Filter media | Metal or ceramic candle elements | High-precision wall-flow SiC ceramic elements |
| Field validation | — | Patented back-blowing applied in 1,000+ systems |
* Quantitative figures and descriptions are compiled from the company's published technical materials. Final selection must be calculated against actual duty conditions.
From materials to control systems, end to end
Materials & media
Advanced ceramic media sintering, ceramics and membrane research, supported by an in-house centre and university partnerships.
Systems & control
High-temperature system design, filtration sizing, process optimisation and control programming — equipment matched to process.
Engineering validation
3,000+ systems in multiple countries, and 30+ years of Chinese-German specialist experience turned into reusable know-how.
Let us match the technology to your duty
Share gas flow, temperature, dust characteristics and process constraints; our engineers will come back with a specific recommendation.