In the clean room for drug production, various acidic and alkaline substances, organic solvents, general gases and special gases are often used or produced in the production process of products; in the production process of sensitizing drugs, some steroidal drugs, highly active and toxic drugs, corresponding harmful substances will be discharged or leaked into the clean room, so the above products may be discharged from the clean room The production process equipment or process of various hazardous substances, gases or dust shall be equipped with local exhaust device or whole room exhaust device. According to the type of exhaust gas discharged in the production process, the exhaust system can be roughly divided into the following types.
1. General exhaust system: general exhaust gas discharged from auxiliary production room, living room, etc. generally does not need to be treated and directly discharged into the atmosphere.
2. Organic gas exhaust system: when all kinds of organic substances are used as raw and auxiliary materials in production, the gases will emit organic substances in relevant places or equipment, and exhaust devices shall be set for such places or equipment. The organic gas in the exhaust system shall be treated accordingly and then discharged into the atmosphere.
3. Acid gas exhaust system: in the production of products, acid gas is discharged. In this type of exhaust system, a wet scrubbing absorption tower is usually set, which is discharged into the atmosphere after treatment.
4. Alkaline gas exhaust system: acid gas is discharged during the production of the product. In this type of exhaust system, a wet scrubbing absorption tower is usually set, which is discharged into the atmosphere after treatment.
5. Hot gas exhaust system: all kinds of furnaces, high-temperature sterilization equipment, etc. in the production process are discharged with hot gas. Due to the high exhaust temperature, sometimes heat recovery and other methods can be used for treatment. If the exhaust volume is small or inconvenient for treatment, it can be directly discharged into the atmosphere after taking necessary heat insulation measures.
6. Exhaust system with dust: in different production processes, the dust properties and concentrations in the exhaust are different. When the dust concentration is very high, the dust removal equipment shall be used to filter the exhaust gas and discharge it into the atmosphere after meeting the requirements.
7、 Special gas exhaust system: for the generation of special gas (belonging to flammable, explosive, toxic, even highly toxic or corrosive gas), chemical reaction shall be prevented in the exhaust system. The exhaust system shall be divided, and special waste gas treatment device shall be selected. The large gas shall be discharged after reaching the emission standard.
8. Harmful and toxic exhaust system in drug production: high efficiency filter shall be installed at the air outlet of some special drugs (such as highly sensitized drugs, some steroids and highly active and toxic drugs) room to reduce pollution and then discharge into the atmosphere.
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