For most of us, powder products do not seem to make a difference, but for powder transmission experts, the mystery can be more. Each powder has different density and fluidity, just like different liquids have different weights and viscosities. Of course, the facts are much more complicated. First, depending on the degree of ventilation, the liquids have different densities and fluidities. To better understand the powder, you must understand the concept of "particle size." The properties of relatively small bulk or micronized powders and relatively bulky powders such as sand or sugar vary widely. In general, the density and particle size of the powder determine the method that should be used for transmission. The oblique air transport method is very suitable for small-grained powders, but it is less effective for large-grained powders. The micronized powder is difficult to handle, but once it is ventilated it flows like a liquid. For these reasons, there are only a few types of powder transport technology. It is so difficult to transfer powder from A to B. The Standalone Powder Transfer System is ideally suited for transferring powdered objects to processing or packaging equipment, and the use of the device avoids complex labor input. However, in the pharmaceutical environment, toxic infringement of products has become the primary factor to consider, and the chosen transmission system must prevent cross-contamination. Some of these types of transmission systems allow short-distance transmission between processing equipment such as pharmaceutical test tubes and mixers, with high cleanliness, efficiency, and reliability. For example, the Ytron-Quadro series of vacuum transfer systems. At present, Quadro-Vac is widely used in the field of container transport on rough dry surfaces, and it is very suitable for dry pharmaceutical powder products. The operating rules of the transmission system must be straightforward. The transfer funnel, which is usually an inverted cone, is also designed to be cylindrical and has a filtering device on its underside. The funnel is vacuumed and the product is brought into it through a long conveyor tube. When the funnel is in an overflow state, the vacuum is automatically released and the product falls from the discharge flap due to the loss of gravity. Re-in-vacuum When the funnel is empty, the product's discharge valve and valve are automatically closed, the product in the funnel is again in vacuum, and the next cycle begins again. In most pharmaceutical applications, the vacuum in the transfer system comes from a separate processing room. Vacuum hoses are connected to the equipment through hollow walls or ceilings (usually stainless steel), thus eliminating the risk of cross-contamination in both spaces. It is also responsible for passing the product through the filter of the funnel before the air is released from the vacuum pump. Some devices also have photometric devices that increase the speed of air flow. These filters can retain fine particles less than 1 micron. Use of a second HEPA filter device However, in the pharmaceutical industry or hazardous goods industry, the powder transfer processing system must have a second HEPA filter. The device can be mounted near a vacuum pump or near a transportable unit. For the non-pharmaceutical industry, there is more than one filter device. Ytron-Quadro's vacuum transmission system delivers clear, simple speeds. When the hopper is empty, it can be quickly removed and cleaned. The maintenance of the fixed part is very easy. Only the hoses and filter equipments need to be checked and replaced in a complete set of equipment. However, these are not cheap and one group can be purchased at one time. For applications with small and medium-sized equipment of approximately 2.5 tons per hour, the vacuum transfer system is usually designed as a movable small part. An active structure drives vacuum pumps, HEPA filters and regulators, and funnels can have lifting devices that can be raised or lowered for cleaning. Adjustable mounting position Vacuum transfer is possible for devices that have a small gap or space. The shape of the funnel is adjusted relative to the specific conditions, and other parameters are also changed as needed. Vacuum pumps and regulators can be installed in a fixed position, as long as they are easy to access and operate. Quadro-Vac recently had an example of this application. The mission was to transport a carcinogenic powder material from a 25 kg paper bag to a mixing vessel. The customer asked to minimize manpower. The paper bag was picked up by the robot from the tray, eliminating manual work and placing it on the conveyor belt to slowly enter the entrance. Afterwards, the door was automatically closed and the paper bag was opened by a clever robot with a "safety cutter". It pours the powder from the paper bag into the funnel and connects the Quadro-Vac vacuum transfer unit next to a mixing vessel 12 meters away. Clean dust-free air Q-uadro-Vac is connected to the mixing vessel with valve control. Once the powder enters the vessel, the valve closes tightly, and the connection between the vacuum transfer unit and the vacuum transfer unit is cut off immediately to ensure clean air. . Afterwards, Quadro-Vac moved? At the same time, a series of powder transmission equipment manufactured by the Ashton Group in New Zealand is now represented in the UK by GEI Albro, who are also experts in powder filling equipment. Their Vacu-Trans dense and ultra-dense vacuum systems can be delivered at a low rate, minimizing friction. The device is commonly used at a rate of about one meter per second and cannot be compared with air transport, which is typically 10 meters per second. This is determined by its density. If a 100mm diameter hose is used, the powder flow rate of the device is around 5-10 tons per hour. Automatic Filling System Today, the pharmaceutical industry uses a fully automated filling system that transports powder from a stainless steel IBC container to a hopper in the filling machine. Each container is transported by a forklift and discharged into a specific structure and automatically sealed after the transfer system has completed filling. The valve at the bottom of the container is manually opened, after which the powder is transferred to the hopper of the filling machine as required. Transmission is intensive, prevents powder ventilation, provides gravity, and fills gaps between powders completely. The container's vibration device will automatically open to improve the tightness of the filling. The whole system is dust-free and the product's transmission and filling are integrated. The replacement of the filling container is very simple and if necessary, all the conveying tubes can be removed and cleaned.
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