Solutions / Multiple JY-DX40-W Precision Filters with Stainless Steel Wedge Wire
Lubricants & Reclamation
Multiple JY-DX40-W Precision Filters with Stainless Steel Wedge Wire
Petroleum Re-Refining (Waste Oil Recovery & Reuse)
Key outcomes
- Filter cartridge cleanable and reusable: wedge wire filter cartridge supports backwash reuse, significantly reducing consumable costs
- High-temperature and corrosion resistance: all-stainless-steel construction, compatible with high-temperature conditions during re-refining
- Maintenance workload reduced approximately 90%: reduced approximately 90% of manual cleaning and cartridge replacement workload (customer feedback)
Case Study
Stage 1 · Customer Problem
Re-Refining Plant Pain Points
An environmental technology enterprise in Southeast Asia specializes in the re-refining of waste lubricants and industrial oils, converting them into base oils and industrial fuels. In the petroleum re-refining process, the customer faces the following technical bottlenecks:
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Extreme Conditions
Process oil temperatures are high and contain acidic substances, causing traditional polymer filter cartridges to undergo thermal deformation or chemical degradation.
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Cartridge Clogging
Waste oil contains large amounts of carbon black, metal powder, and polymer coke. Traditional cartridges can only maintain operation for a few hours at 20 m³/h flow rate before being sealed shut.
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High Operating Costs
Frequent replacement of disposable filter cartridges generates large amounts of waste, and cartridge procurement costs are high.
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Downstream Process Damage
If front-end filtration is incomplete, solid particles entering hydrogenation or refining reactors will cause catalyst poisoning and failure.
Stage 2 · Fuel Analysis · NEW
Waste Oil Contaminant Profile
Laboratory analysis of the feedstock waste oil before treatment revealed the following key indicators driving the filtration challenge:
| Parameter | Value | Assessment |
|---|
| TAN (Total Acid Number) | 2.0–4.0 mg KOH/g | Elevated — acidic species present |
| Sediment / Solid Content | High (carbon black, metal powder, polymer coke) | Severe — rapid cartridge clogging |
| Operating Temperature | High (re-refining process) | Polymer cartridges risk thermal deformation |
| ISO Cleanliness (raw feed) | >26/24/21 | Poor — exceeds downstream reactor limits |
| Corrosivity | Moderate–High (chloride risk) | SS316L pitting corrosion must be evaluated |
Note: TAN range reflects acidic species accumulated during waste oil service life; chloride content should be verified per batch to assess pitting corrosion risk for stainless steel components.
Stage 3 · Solution
JY-DX40-W Wedge Wire Precision Filtration System
For the demanding re-refining environment, the customer selected the JY-DX40-W wedge wire precision filtration system, deployed in a multi-stage gradient configuration from coarse to fine filtration:
Filter Media
Stainless steel wedge wire
Material
SS316L (all-stainless)
Gap Precision
25–100 μm (controllable)
Structure
V-shape, narrow-outside / wide-inside
Backwash Regen
Gas-pulse regeneration (brief 5-15 min safety pause)
Design Flow Rate
20 m³/h (stable)
Deployment
Multi-stage gradient (coarse→fine)
The wedge wire technology uses V-shaped stainless steel welding with a "narrow outside, wide inside" structure that resists clogging and restores flux through backwashing. Backwashing requires supporting clean media (such as clean oil or steam) and a waste liquid collection system. The all-SS316L construction withstands high-temperature impact and chemical corrosion; pitting corrosion risk must be evaluated under chlorine-containing conditions.
Stage 4 · Results
Operational Outcomes
~90%
Maintenance Reduction
20 m³/h
Stable Treatment Rate
Reusable
Cartridge (backwash)
| Metric | Before (Traditional) | After (JY-DX40-W) | Improvement |
|---|
| Cartridge service life | A few hours (sealed shut) | Backwash-reusable, long-term | ≈90% workload reduction |
| Treatment rate | Unstable, frequent shutdowns | Stable 20 m³/h | Continuous operation |
| Consumable cost | High (frequent replacement) | Significantly reduced | Backwash reuse |
| Catalyst protection | Risk of poisoning | Solid particles intercepted | Downstream safeguarded |
By deploying the JY-DX40-W system, the re-refining plant reduced frequent shutdowns for cartridge replacement. The wedge wire cartridges demonstrated good durability, maintaining a stable 20 m³/h treatment rate even when processing waste oil with heavy sediment loads. Since cartridges can be backwashed and reused, consumable costs were significantly reduced and the maintenance workload decreased by approximately 90%. According to customer feedback, the equipment investment was recovered within approximately one year.
Stage 5 · Lessons Learned · NEW
Key Takeaways
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Material Selection Matters
All-SS316L construction is essential for re-refining environments combining high temperature and acidic species; it withstands thermal shock and chemical corrosion where polymer cartridges fail.
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Chloride Pitting Risk
Under chlorine-containing conditions, pitting corrosion risk for SS316L must be evaluated per batch; chloride content monitoring is recommended to ensure long-term integrity of wedge wire elements.
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Backwash Infrastructure Required
Gas-pulse regeneration requires supporting clean media (clean oil or steam) and a waste liquid collection system; plan auxiliary infrastructure during system design to ensure reliable backwash cycles.
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Customer feedback
In the re-refining industry, treating waste oil has always been a challenge. The JY-DX40-W stainless steel wedge wire technology effectively solved our pain points. It is relatively robust, and filter cartridge waste is significantly reduced, aligning with our enterprise's green environmental philosophy.
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