Design requirements of laminar flow hood and negative pressure weighing hood in DUst-free workshop of GMP pharmaceutical factory:
In terms of the installation form and sealing of the filter, the installation structure of the liquid tank hePA filter seal can technically ensure that there is no leakage of air pollution downstream of the filter, and it is easy to install and replace. Fan box adopts external rotor direct connected fan, easy installation and maintenance. Plate type medium effect filter can be set in the return air outlet, and differential pressure gauge can be installed at the same time, convenient replacement when necessary.
Fan box adopts external rotor direct connected fan, easy installation and maintenance. Plate type medium effect filter can be set in the return air outlet, and differential pressure gauge can be installed at the same time, convenient replacement when necessary.
Laminar flow hood plenum part, because here is a positive pressure structure, the requirements for sealing in the ceiling are not very high, so the requirements for structure can be simplified. Laminar flow cover lighting uses teardrop lamps, maintenance and replacement is universal. Laminar flow cover and air supply panel, using European advanced technology imported polymer flow film, with low resistance, uniform air flow and high light transmittance, can be easily cleaned and installed.
Reducing the clean space volume, especially the high level clean room volume, is a fast and effective way to achieve energy saving. The air volume of the purification system depends on the room volume and the number of air change, and the number of air change is mostly determined by the clean level. Therefore, to reduce the air volume of the clean system, we can start from the reduction of clean space, which means that the air volume ratio is reduced, and the number of air change can be reduced to reduce the power consumption of the air supply. Clean rooms consume many times more energy per unit area than ordinary air-conditioned office buildings. According to the requirements of different air cleanliness levels, they should be arranged centrally and try their best to reduce the area of clean rooms. The energy consumption of high-level clean rooms is generally higher than that of low-level clean rooms. Therefore, reducing the area of clean rooms or reducing the area of high-level clean rooms is to reduce energy consumption. At the same time, clean rooms with high cleanliness requirements should be arranged as close as possible to the air conditioning room to reduce pipeline length and energy loss.
Adopt clean tunnel and other energy saving technology
One of the practical techniques to reduce the volume of clean space is to establish clean tunnel or tunnel clean room to meet the dual purpose of high cleanliness and energy saving. It divides the clean space into process area, operation area, maintenance area and channel area with different levels of cleanliness according to production requirements. Clean process area space is reduced to the minimum, it maintains the general one-way flow of cross-section wind speed, about 0.3 -- 0.4m/s, and the operating area of the wind speed has been reduced to 0.1 -- 0.2m/s, the air volume is greatly reduced. It claims to reduce volume by 30% and achieve energy saving by 25%.
Clean tunnel laminar flow cover device can also be used to resist the interference and pollution that may exist in the operation area with low cleanliness to the process area with high cleanliness. (rather than by increasing the cross section wind speed or the cover area), under the same total air volume, the clean cross section area before the cover can be expanded 5-6 times. At the same time, there are clean rooms, clean worktables, self-purifiers, microenvironments and other ways to implement local air flow protection to maintain the high clean level requirements of the area, such as negative pressure weighing cover with laminar flow and laminar flow device with powing machine can reduce the volume of clean space.
The air in the weighing cover is pressed into the static pressure chamber by the centrifugal fan through the primary effect filter, and then blown out from the air outlet surface of the air diffusion air supply unit after passing through the high efficiency filter. The clean air flows through the working area with uniform cross-section wind speed, thus forming a high clean working environment. The operating area of the central weighing hood is maintained at negative pressure, discharging 10% of the circulating air. The air in the central weighing chamber is self-circulating through a two-stage filtration system (hePA filter removes 99.99% particles ≥ 0.3 μm and all dust), which is designed to meet the GMP requirements of pharmaceutical factories.
Weighing cover protects drugs from contamination, protects people from contamination, and protects the external environment from contamination.
The flow manifold of the weighing hood is vertical upward and side back. Air from top to bottom through the workspace, the work of the dust float in the sky at the beginning of oppression to the side at the bottom of the effect, the effect and the bag into the bag out of the device, the air by the fan to efficient filter, static pressure box part through efficient filter back to indoor workspace, the other part through the vent filters to work outside, make weighing enclosure form negative pressure, equipped with four differential pressure sensor.
Add: Chengdu Gaoxin West District Science and Technology Park