Since the introduction in 2011 of the JOA optical ΔVAT-sensor for gentle product conveying, JOA has built over 200 pneumatic (industrial) conveying lines. An important part of a pneumatic conveying system is the product receiving filter. Especially for micronized powders (micron or even nanometer range) in food, mineral, and for active pharmaceutical ingredients production, this filter has become more and more important. In addition to meeting emission norms and ATEX compliance, the focus lies on preventing cross-contamination and enabling maximum product recovery. This is achieved by installing an internal acoustic radiator cylinder for an Acoustic Cleaning in Place (CiP) operation cycle.
The patent-pending JPF series of downflow product filters are equipped with an internal ultrasound ‘radiator cylinder’ connected to several high-power Pusonics transducers, generating 21 kHz @ 163 dB ultrasonic waves. This makes the internal cylinder an effective ultrasound ‘radiator’, preventing the valuable powder from sticking to the smooth finish wall as much as possible, during the conveying process. The JPF receives and separates the valuable end-product (e.g. in the range of D50: 8-50 μm) from the conveying air with a product loading ranging from 15-150 g/ m3 of air.
The Acoustic CiP cleaning cycle starts after finishing the production (batch). When the powder conveying process is stopped, the filter-bags are cleaned by the reverse pulse jets. Then the filter division plate and the powder release cone are cleaned by product specific pressurized air sweeps. Finally, the Acoustic CiP cleaning cycle is applied in ‘power mode’, while at the same time venting the filter in reverse, venting out the remaining fine powder to a secondary filter unit.
Through patent-pending JPF Acoustic CiP technology is rather new it can be applied to enhance economic value across food, mineral, cosmetic, and APIs manufacturing. The JPF design starts with product and particulate analyses, providing insight into the required air to cloth ratio and can velocity of the filter. Combining adhesion force determination (comparison data base) and modeling of the frequency of the radiator cylinder itself are emphasized for effective Acoustic CiP operation. JOA consultants are available to support you with lab scale Acoustic CiP testing on actual product samples.
Benefits of JOA’s Industrial Conveying Control Unit (DVAT or DeltaVAT)
- Yield improvement by minimized product degradation
- Robust design with proper feeding pipe optimal routing based on GCM Modelling
- Blend Selector flexible, extensible and compact design
- Patented ∆VATTM – FBFC conveying controlled feeding by determining:
- ∆VATTM slip ration
- Product speed increase
- Product loading & dune shape