Why should the purification workshop be humidified?

General purification plants, especially clean plants for electronic industry, have strict requirements for constant temperature and humidity, not only for the temperature and humidity in the plant, but also for the fluctuation range of temperature and relative humidity Therefore, the corresponding measures should be taken in the air treatment of purification air conditioning system, such as cooling and dehumidification in summer, heating and humidification in winter For the humidification problem of clean air conditioning system, there are many humidification methods, such as watering, wet film, high pressure spray and ultrasonic water humidification These humidifying methods are equal enthalpy humidification process While steam injection, dry steam injection and electrode (electric heating) humidification are steam injection into the air supply of the air conditioner, and the humidification method belongs to the isothermal humidification process In order to ensure the accuracy of relative humidity in the clean workshop, the accuracy of the water humidification method such as spray water, high pressure spray, wet film and so on is not high, so when the relative humidity accuracy of the clean workshop is less than or equal to 10%, Zui is not used According to many years of experience, different humidifiers have different applications: such as ultrasonic humidifier, wet film, high pressure spray and other humidifiers Their humidifiers are characterized by large humidification and low investment cost, while the relative humidity control accuracy is poor ± 10%) for industrial plants with large humidification capacity and air conditioning system of general comfortable air-conditioned rooms The dry steam humidification and electrode (electric heating) humidification with high relative humidity control accuracy are mostly used in the humidification of the air conditioning system of the constant temperature and humidity clean workshop with strict relative humidity accuracy requirements due to high investment
The biological cleanrooms (such as biopharmaceutical, clean operation room, biosafety laboratories, experimental sterile animal feeding rooms), which are controlled by microorganisms, should control the generation and propagation of microorganisms, because humidity and water are conditions for breeding and breeding of microorganisms Therefore, the methods of water drenching, wet film and high-pressure spraying can not be used in biological cleanrooms Only dry steam humidification and electrode (electric heating) humidification can be used It is also worth noting that in recent years, the outdoor air relative humidity in South China, such as Shenzhen, Guangzhou, Shanghai and Suzhou in East China, is relatively standard in winter The calculated relative humidity of outdoor air conditioning is low For example, in winter, the calculated relative humidity of outdoor air conditioning is 70% in Shenzhen and Guangzhou, and 75% in Shanghai and Suzhou However, the measured relative humidity of outdoor air conditioning in these years is sometimes only about 30% Therefore, the humidification capacity of the built and operating clean workshop is insufficient, and the indoor relative humidity is low, which can not meet the design requirements Some factories add moisture film or spray to the original air conditioner for the sake of convenience and saving money to add humidification However, contrary to our wishes, not only the amount of humidification can not be added, but also the added water will soon saturate and become condensed water, which can not achieve the purpose of humidification Because wet film and high-pressure spray are humidifying processes, air conditioning before humidification must be heated to a certain temperature before humidifying It is not feasible without heating There is also a problem that should be paid attention to in humidification, that is, air flow with water in air conditioner In some projects, due to the problem of humidification with water, the middle effect filter and even the filter behind are wet by the water For the dry steam humidifier, attention should also be paid to the slope and direction of the steam pipe and condensate pipe, so that the condensate can be quickly discharged out of the air conditioner If the humidifier is set in the fan section of the air conditioner, measures shall also be taken to avoid condensation water dripping on the motor, resulting in short circuit and power failure of the motor.