Large bag unloading station--docking system can realize the leakage-free loading and unloading of bulk materials

As people see an increase in the use of special materials, there is an increasing interest in the handling of large bag unloading stations for leak-free particulate materials. Engineering technicians and designers have exhausted all the solutions and developed a variety of different types of leak-free, dust-free loading and unloading interfaces to ensure that the pollution of the surrounding environment is almost zero when loading and unloading toxic and harmful raw materials.

Often walking by the river, how can we not wet shoes. This proverb is not a big problem for describing anomalies in other industrial fields, but it cannot be used to describe the loading and unloading of high-value bulk materials or toxic and hazardous materials. In principle, people cannot be made to feel that his work is dealing with toxic and harmful substances, and that people cannot feel that his job is dangerous. To do this, it must be ensured by meticulous craftsmanship.

Since the emergence of the new term "Total Contaiment" and new products, it has brought great convenience to the people who produce and work in the chemical industry and the medical and health industry, and has also brought great protection to people's living environment. Effectively prevent cross-contamination. In chemical companies and pharmaceutical companies, the difficulty in transporting bulk materials is the bulk of the raw materials between transport containers (boxes, drums or large pockets) and production equipment (airflow mixers, fluidized beds or wet mixing granulators). Loading and unloading; especially in the pharmaceutical industry, intermediate products (such as active pharmaceutical ingredients APIs) are more difficult to handle and transport. Because in the regulations of sanitary and environmental protection of pharmaceutical companies, the limit value of APIs content in production posts is becoming more and more strict. Not only pharmaceutical companies, but also manufacturers of specialized chemical and fine chemical companies are trying out "Total Contaiment". This phenomenon is more proof of the correctness of Mr. Andress Znidar, the head of production at Glatt Systems GmbH in Dresden. He said: "According to a survey in an industry field, in the past five years, 70 sets of equipment for high-activity materials have been added to pharmaceutical companies. In the next two years, the number of such equipment is expected. Continue to increase. Almost 20% of these devices are used in highly toxic production environments with OEL content less than 1g/m3. OEL is the abbreviation of Operator Exposure Limit, the definition of which is very complicated, It's not dust-free, because even nano-sized dust particles have a very strong poisoning effect. Mr. Znidar listed several important things that must be particularly noticed in detecting ambient air pollution:

■ Where is the measurement taken? Directly near the source?

■ How long does the measurement last?

■ Have you used chemical product detection or particle counting?

■ Does the measurement reflect a transient concentration or a weighted value based on the 8h period?

■ What product (particle size, type, fluidity) is used?

■ Is there a local dust removal device at work?

■ Is the active substance at a concentration of 100% or a "diluted" active substance used?

In order to make the results of the measurements comparable, the professional used the standard specification of the test test for 2 years. This test specification is called the SMEPAC standard and is expected to be implemented by the International Medical Engineering Association ISPE in 2003.

"Dust-free" operation becomes a reality

Manufacturers have invested a lot of money to develop a truly "dust-free" loading and unloading device. More and more enterprises have chosen to use the docking to achieve dust-free loading and unloading to replace the investment cost of the isolation technology and time-consuming and labor-intensive personal isolation clothing, using docking technology to achieve dust-free loading and unloading. The adoption of this technology has also significantly reduced the area of the clean room. This article will introduce the reader to several different dust-free docking systems:

Glatt Systems Technologies has developed a patented live cover docking system for chemical companies that use powder and particulate solids for production. The live cover of the passive connection in the live cover docking system is located on the moving transport container; the other half of the live cover docking system of the drive interface device with the docking and interconnection interlocking power is located on the production equipment. After using Glatt's SKS live cover docking system, the current air concentration of harmful substances detected in accordance with the SMEPAC test specification during powder or granular material handling is less than 1礸/m3, and is detected at a distance of 200mm from the source. The results obtained.

The Total-Containment docking system is a docking system developed by GEA Buck Valve. The sealing solution for this system was developed jointly by GEA and the specialist in sealing technology: Precision Polymer Engineering (PPE). The entire seal docking system consists of an active valve and a passive valve. An absolutely dust-free, sealed connection between the two containers is achieved. Active valves can be operated either manually or automatically and are configured on production equipment. Since the passive valve does not have an opening element, it is generally used on a stationary IBC container or a mobile IBC container. The seal between the two valves, made of PPE's proprietary material "Perlast", is effective against chemical media corrosion over a wide range of operating temperatures. When talking about the choice of sealing materials, Mr. Martin Koch, President of GEA Buck Valve, said: "Our seals made of PTFE materials failed in the first sealing performance test, and the results were very unsatisfactory. Because PTFE is too Hard, can not play an effective sealing effect under the high pressure in the chemical production process. We finally decided to use Perlast material to make the two-valve butt seal, which has good chemical resistance and toughness, thus solving the high pressure resistance. problem".

Complete tasks easily

Large barrel-type containers are still an important tool for the preservation and transportation of many powdered chemical raw materials as before. It is very cumbersome to use the method of lining the bag to empty the raw materials in the bucket. This is not only because the powder raw material is loose, but also because the weight of the barreled material is generally 50 kg. In order to solve the complete emptying of the barrel material, Diettrch Engineering Consultannts of Switzerland and PTS jointly developed a DCS (Drum Containment System) loading and unloading docking system. With this DCS loading and unloading docking system, the loose powder raw material can be loaded and unloaded directly between the two containers reliably and without environmental pollution. The DCS system is a transparent cylindrical operating box: Glove-Box. Glove-Box has openings for the protective gloves on both sides; the bottom stainless steel connection flange and seal for connection and sealing with the barrel container. Above the Glove-Box, there is a suction tube and a corrugated protective cover for sealing. The entire docking system is connected with the pneumatic lifting device, so that the Glove-Box can be conveniently connected and uncoupled between the powder raw material barrels.

Similarly, Bohle-Containment System has developed the BCS loading and unloading docking system for leak-free, dust-free solid materials. This is a universal, universal, leak-free, dust-free docking device. It can be part of a docking device for transport equipment under large container conditions, as well as for the handling of leak-free, dust-free solid chemical raw materials in, for example, Bohle-production equipment.

The system is characterized by a simple structure. This BCS docking system uses a device called Split-Cone, which combines the active side with the tapered surface and the passive side with a tapered surface that is joined together under vacuum. The sealing connection formed in this way is very tight, so that the joint surface does not have to be cleaned after the docking device is opened. Since the docking device adopts a symmetrical form of the rotating body structure, the active side can be docked in any direction. The solid medium that is loaded and unloaded and delivered is transported through a quick joint. With this structural design, the number of exposed wires and the number of nozzles is significantly reduced.

With the help of this BCS docking device, the FDA's regulations can be fully met, and the production environment at the loading and unloading site is greatly improved, and the residual dust content is less than 1礸/m3.

The leak-free and dust-free docking device developed by the equipment manufacturer AZO has its own characteristics: it ensures no leakage and no dust loading and unloading regardless of the shape of the docking interface. For example, the storage equipment used by Hermes Pharmaceuticals uses this type of handling device. It can directly transfer the loaded raw materials to the positioning tank by pneumatic suction system. A variety of different raw material storage bins, each with its own conveying pipeline. These round, quantitative storage bins are highly resistant to negative pressure and feature a large area filter to trap dust particles. Depending on the needs of the production products and batches, these storage bins can be easily removed from the loading and unloading stations and storage stations for cleaning and cleaning. When the raw material transport container comes to the loading and unloading station again, the dust-proof connection system starts a new docking and completes the leak-free and dust-free loading and unloading together with the positioning device.