Bag-in-bag-out filtration device

Bag-in-bag-out filtration device, also known as Bag In Bag Out Filter, often abbreviated as BIBO or Safe Change Filter Housing, is a special type of filtration equipment. The following is a detailed introduction to the bag-in-bag-out filtration device:

1. Definitions and Principles

The bag-in-bag-out filter device is a kind of protective device for ventilation pipes, the principle of which is to use stainless steel full-welded box as a protective structure, and a filter is installed inside to filter out impurities and particles in the air, so as to improve the safety and quality of the air. In the filtration process, air enters the filter box from the inlet, and after the filter's filtering action, impurities and particles are trapped, while pure air flows out of the outlet.

2. Characteristics and applications

Peculiarity:

The installation, replacement and testing of the filter are all carried out under the protection of PVC bags (or high-temperature bags), and the filter unit is not in contact with the outside air at all, ensuring the safety of personnel and the environment.

The overall robustness and air tightness are very reliable, and meet the standards of the nuclear industry of various countries.Apply:

Bag-in-bag-out filtration devices are widely used in various fields with high hazard or high isolation requirements, such as chemical and biological (CB) protection, chemical, biological and radiological (CBR) protection, nuclear and chemical, biological and chemical (NBC) protection, etc.

It is also widely used in hospital isolation rooms, pharmaceutical equipment, microelectronic environments, food processing areas, P3/P4 biosafety laboratories, genetic and biotechnology laboratories, etc.

In addition, it is also used in industrial treatment and discharge systems, chemical treatment equipment, animal disease research laboratories, radioisotope element processing equipment, nuclear power plants, strategic nuclear facilities, military bases and other fields.

3. Structure and composition

The structure of the bag-in/bag-out filter device is similar to that of a combined air-conditioning unit, which combines different functional units in a bag-in/bag-out box (BIBO Housing) according to the needs of use. Depending on the application, the commonly used functional units include pre-filter, HEPA, HEGA, Precision ScanTest Sections, etc.

In addition to the above main components and different occasions, it is also equipped with disinfection ports and disinfection confirmation ports; There are also some supporting equipment on the bag-in-bag-out filter box, such as pressure gauges, pressure measuring holes, quick connection ports, etc. A miniature high-efficiency particle filter is installed between these components and the cabinet to ensure isolation from the outside world.

4. Replacement and testing

Replacement:

When the filter is first installed, the new filter unit is pushed along the track directly into the filter box and locked, and then the PVC bag is installed on the specially designed flange and fastened with a safety belt to ensure that the PVC bag is sealed between the flange.

When replacing the filter unit, the staff opens the access door, puts both hands into the gloves on the PVC bag, loosens the locking device of the filter unit, and slides the used filter unit into the PVC bag. The bag is then tightened in the middle and the part containing the filter unit is cut so that the discarded filter unit is removed from the box by means of a PVC bag.

Then the new filter unit is loaded into a new PVC bag, and the new PVC bag is tightly tied on the flange. Remove the remaining bag mouth on the flange, put it in the gloves of the new bag, cut it off, roll the new bag, close the access door and press it tightly, and complete the entire replacement process.

Detect:

In the standard configuration of the bag-in-bag-out filter, an automatic (or manual) scanning and detection unit is set up, which can detect the efficiency and safety of the filter at any time.

The detection unit is adjacent to the filter surface composed of the filter and its frame, and a sampling device is arranged at a certain distance from the filter surface. The sampling device will make a serpentine or linear motion along the entire filter surface to inspect the filter surface and sealing area of the filter equipment.

5. Development history and trends

Bag-in-bag-out filtration devices appeared in the fifties and sixties of the last century, and with the progress of science and technology and people's attention to research in the field of biosafety and disease control, its application scope and importance have become increasingly prominent. In the future, bag-in-bag-out filtration devices will be developed in the direction of more efficient, safer and more convenient to meet the needs of filtration technology in different fields.

Conclusion

To sum up, the bag-in-bag-out filter device is an efficient, safe and convenient filtration equipment, which has a wide range of application prospects and development potential.