Air tightness measures in purification workshop
Air tightness measures in purification workshop
There are many structural gaps in the maintenance structure of the purification workshop, such as the installation seam of the wall or ceiling, the installation seam of the high-efficiency filter air outlet, the installation seam of the lamps, the installation seam of the door, window, air return outlet, and the pipeline perforation, etc.; The idea of u200bu200bjust using positive pressure measures is incomplete because a certain...
Text label: purification workshop design company, purification workshop engineering, purification workshop installation
Air tightness measures of purification workshop
There are many structural gaps in the maintenance structure of the purification workshop, such as the installation seam of the wall or ceiling, the installation seam of the high-efficiency filter air outlet, the installation seam of the lamps, the installation seam of the door, window, air return outlet, and the pipeline perforation, etc.; The idea of u200bu200bonly using positive pressure measures is incomplete, because some purification workshops for product production also require maintaining pressure with adjacent rooms, and not only positive pressure measures can prevent contamination or cross-contamination, and positive measures should be taken first to prevent pollution or cross-contamination. Reduce the structure gap and strengthen the air tightness of the gap structure to minimize air leakage or pollution; the air tightness of the maintenance structure and doors and windows of the purification workshop is a necessary condition for the design and construction of the purification workshop. There is no such condition. Maintaining a clean operating environment not only increases operating costs in most cases, but is sometimes impossible.
The doors and windows of the purification workshop should be made of materials with small natural deformation, small error in production size, easy to control gaps, and good air tightness; for the doors and windows of the sterile room, the specification strictly stipulates that wood products shall not be used; air-conditioned areas and non-air-conditioned areas The windows between the areas should be set with double-layer windows, at least one of which is a fixed window. The connection doors between the purification workshops of different cleanliness levels should be airtight, flat, and simple in shape, and the doors should be opened in the direction of higher levels; the doors and windows should be sealed. Materials include rubber strips, silicone rubber, sealants and single and double-sided pressure-sensitive tapes. The casement type airtight door is the most used type of door in the purification workshop. It is usually used for peers or transportation for emergency evacuation. Generally, the elastic material of the formed section is used as the sealing strip to be fixed and sealed at the gap. The sealing strip should be laid continuously along the perimeter of the movable gap, so as to form a closed annular sealing line after the door is closed. , to minimize the interruption gap of the sealing strip at the door seam. The door at the entrance of the material and the production area of u200bu200bthe purification workshop directly lead to the outer door of the outdoor. In order to reliably prevent the intrusion of outdoor air, in addition to the air lock and double door, the cross-section of the sash and the fan is also more than the general inner door. It is much larger, usually two sealing strips are used to form two sealing lines of defense; in order to adapt the sealing strips to small cross-section and large compression after being stressed, and to have sufficient contact with the compression member and good sealing conditions, they are usually made into Different types of rubber hollow thin-walled special-shaped pipes, and most of them are molded products; from the perspective of purification and force requirements, the selected sealing strip material should be dust-proof, dust-proof, water-resistant, mildew-proof and wear-resistant. , Elastic, not easy to age. Zhongjing Global Purification can provide consulting, planning, design, construction, installation, transformation and other supporting services for purification workshops and purification plants.
The installation and sealing of the high-efficiency filter directly affects the purification effect of the purification pharmaceutical cleanroom. The skeleton material for fixing the high-efficiency filter must be flat and have good rigidity, fire resistance and no dust generation. Generally, the steel skeleton must be prevented from rusting, and the surface layer should be For galvanized treatment, when the surface is still unavoidable to be damaged during construction and installation, it is necessary to use paint for local repair, and the surface of the steel frame can also be directly sprayed with high-strength and anti-aging paint; no matter what kind of frame is used, attention should be paid to the difference between the frame members. The connection is tight and flat, otherwise the base layer interface where the high-efficiency filter is installed will be uneven, which will directly affect the sealing quality; In the directional flow purification workshop, the high-efficiency filter is best installed in the air supply static pressure chamber, which is not only convenient for sealing, leak detection and plugging, but also avoids the need for the filter and its leakage when the purification air conditioning system of the purification workshop is operated intermittently. Dust accumulation on the pressure frame affects the cleanliness of the room.
The sealing and caulking measures in the purification workshop can prevent air infiltration, short circuit of fresh air, and scattering of dust particles at cracks and the intersection of different materials. It is a necessary measure to maintain positive indoor pressure and improve air cleanliness; for steel, aluminum, glass, Ceramics, concrete, terrazzo and elastic rubber materials must have good bonding force. In the case of narrow gaps and smooth base layers, they can be firmly attached to the interface for a long time; they must have certain elasticity to adapt to the possible occurrence of seam accessories. deformation, adapt to a certain impact load, will not crack, and maintain air tightness.
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