Layout of Class B area of u200bu200bpreparation gmp purification workshop
Layout of Class B area of u200bu200bpreparation gmp purification workshop
The air purification system methods for realizing static non-unidirectional flow level 5 and dynamic non-unidirectional flow level 7 in the B-level area of u200bu200bthe preparation gmp purification workshop can be as follows.
(1) Dual-system air supply mode
When the dynamic and static ventilation times differ greatly, two systems can be set up according to dynamic and static...
Text label: gmp purification pharmaceutical cleanroom layout, preparation workshop B-level area layout
The layout of the B-level area of u200bu200bthe preparation gmp purification workshop
The air purification system methods for realizing static non-unidirectional flow level 5 and dynamic non-unidirectional flow level 7 in the B-level area of u200bu200bthe preparation gmp purification workshop can be as follows.
(1) Dual-system air supply mode
When the dynamic and static ventilation times differ greatly, two systems can be divided according to dynamic and static:
One system runs under the dynamic ventilation rate, with fresh air, return air, and air conditioning equipment in the system.
The other system also operates under the static ventilation rate, only the indoor self-circulation, the ventilation rate is selected according to the static ventilation rate and the dynamic ventilation rate. There is no air conditioner in the system.
There are fewer tuyere when it is dynamic, and more tuyere when it is static.
(2) Single-system air supply mode
The system and air outlet are designed according to the static air exchange rate. Through frequency conversion, the air volume can be adjusted down when dynamic.
(3) Single-system air supply and self-purifier method
①Cabinet-type self-purifier is installed in the passage behind the wall panel, with air supply on the upper side and return air on the same side.
②Cabinet-type self-purifiers are installed indoors.
③Any self-purifiers should be placed indoors according to possible positions.
Air outlet arrangement
The different structural forms of the A-level area will affect the arrangement of the tuyere in the B-level area.
(1) The A-level area is basically completely closed to the ground.
In this case, the airflow from area A is basically short-circuited by the return air outlet of area B, so the contribution of airflow from area A to area B can be ignored, which can be regarded as an increased safety factor, and area B can still refer to the previous introduction The calculation of the knowledge of the air volume of the system determines and arranges the air supply outlets, so that the air volume in the B area can be adjusted.
(2) The situation where the A-level area is fully open.
From the calculation of the system air volume knowledge introduced before, it can be seen that when the area B is calculated according to the uniform distribution, nu003d119 times/h, because the filter is not arranged in the B area, the uneven distribution system ψ cannot be calculated according to the method of the introduced system air volume knowledge, And if selected, ψu003d0.86, that is to say, there should be at least 0.86X119u003d102 times/h.
If the air supply speed of area A is considered as 0.45m/s, when the air supply volume of area A can meet the needs of 99.8 times/h, the ratio of area ym2 of area A to the area of u200bu200bthe whole room xm2 is (assuming the room height is 2.8m) ):
y/xu003d(2.8×102)/(0.45X3600)u003d0.176
That is, the area of u200bu200barea A can reach 1/6 of the total room area, and area B can reach static level 5. Since the actual situation is very complicated (including various factors such as air supply speed, floor level, etc.), we cannot be bound by this number.
As with the previous discussion of airflow organization, considering the safety factor, this ratio is generally 1/5. This percentage figure just shows that, under the condition that there is a certain area in area A, the air is supplied without enclosures, and there is no air outlet in area B, it is expected to reach level 5.
(Note: Reference articles for calculation knowledge such as air volume and airflow organization:
Local one-way flow and air outlet in sterile clean room: http://www.ccg-sz.com/xinwendongtai/32-902.html
(3) Self-circulation in area A or self-circulation plus return air in area B.
If all self-circulation in area A, or there is return air in area B but the return air volume is much smaller than the self-circulating air volume, then all or most of the return air in area B is return air in area A, and the cleanliness of return air is obviously higher than that in '2' Air supply cleanliness is poor. Therefore, when there is no air supply in zone B, the ratio of zone A to the total room area is greater than the ratio in '2hongjing Global Purification can provide supporting services such as consultation, planning, design, construction, installation and transformation of purification workshops and GMP workshops.
(4) The A-level area is above the working face and is completely closed to the top.
Let the enclosure be 40cm away from the table at this time, or 40cm away from the section of the work area to be detected. Because the sampling is generally carried out at the section of the working area about 80cm above the ground, the airflow in area A at this time can basically cover the height of the working surface in area B, but after all, there will be more eddy currents in the upper part of area B. The air supply outlet should be set up in the area according to the principle of '1'. Even if the area A has self-circulation, it should only be regarded as a safety factor.
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