? 1. Purification principle: air flow → primary purification → humidification section → heating section → surface cooler section → intermediate purification → fan air supply → pipeline → efficient purification tuyere → blowing into room → taking away particles such as dust and bacteria → return air shutter → primary purification. Repeat the above process to achieve the purpose of purification.
? Second, what are the common purification levels? Purification workshop cleanliness grade: 100 (100) > thousand (1000) > ten thousand (10000) > one hundred thousand (100000) > 300,000 (300). The higher the degree of purification, the higher the cost.
The cleanliness of the dust-free workshop should be comprehensively considered according to the production process, product standards, investment costs and other factors, as long as it is appropriate. Generally speaking, there are no million-level workshops in the industry, or there are 100-level, 1,000-level, 10-level and 100,000-level workshops. If it exceeds 300,000, it is basically not purification workshop and clean workshop. ?
Purification workshop standard 65438+100000.
? 3. Define the air exchange times of 65438+1 00000 purification workshop standard1,100000 clean rooms not less than 15 times /h,100000 times ≥ 15 times /h; The air purification time after complete ventilation should not exceed 40 minutes.
2, ten thousand people clean room ventilation times not less than 25 times/hour, more than ten thousand people not less than 25 times/hour; The air purification time after complete ventilation should not exceed 30 minutes.
3, clean room ventilation thousand times not less than 50 times/hour, thousand times or more than 50 times/hour; The air purification time after complete ventilation should not exceed 20 minutes.
100,000-class purification is to continuously dilute indoor air through clean air flow, and gradually discharge indoor pollution to achieve purification effect.
? Fourthly, define 65438+100000 purification workshop standard100000 purification workshop dust from the amount of dust per unit volume. The maximum allowable number is: the number of particles greater than or equal to 0.5 micron, which shall not exceed 3,500,000 per cubic meter; The number of particles greater than or equal to 5 microns shall not exceed 20000 per cubic meter.
? Fifthly, the maximum allowable number of microorganisms in purification workshop (654.38+ 100000) and purification workshop (100000) is defined from the maximum allowable number of microorganisms: the number of planktonic bacteria does not exceed 500 per cubic meter; The number of settling bacteria in each Petri dish shall not exceed 10.
? 6. Define purification workshop pressure difference 65438+100000 purification workshop standard from the perspective of pressure difference: the pressure difference in purification workshop area with the same cleanliness level is consistent, the pressure difference between adjacent purification workshop with different cleanliness levels should be ≥5Pa, and the pressure difference between purification workshop and non-purification workshop with100000 level should be ≥ 10pa.
References:
Purification workshop standard 65438+100000.