The waste water and waste gas produced by the pharmaceutical industry contain bacteria, acid and alkali waste gas and malodor, which will cause great pollution to the surrounding environment and damage to the human body.
At present, the exhaust gas treatment methods for pharmaceutical plants include adsorption and desorption treatment, catalytic combustion, spray tower washing acid-base exhaust gas, double alkali method, low temperature plasma + composite photocatalysis, condensation, biofilm method, pulse corona method and the like.
1. The biological filtration waste odor purification process adopts the “microbial” degradation technology, and uses the deodorizing microorganisms grown on the filter material to degrade H2S, SO2, NH3 and most of the volatile organic odors, and the purification rate can reach 98% -99%. The system has a lifespan of more than 10 years and can work normally in the outdoor range of -20 °C – 40 °C. It can be operated all year round and runs continuously for 24 hours every day. The treatment process does not cause secondary pollution. Moreover, the system has a small footprint and saves land resources.
2. Low-temperature plasma + composite photocatalysis utilizes the characteristics of large-flow, low-concentration organic waste gas produced in the production of medicine and other industries. First, high-energy electrons are generated by low-temperature plasma, and the harmful gases in the exhaust gas factor are directly decomposed to form rapidly. It rapidly forms small molecular fragments, decomposes to form CO2, H2O, etc., and then uses the photocatalyst to degrade various harmful gases that have not yet been degraded, thereby achieving a comprehensive degradation effect satisfactory to the production of exhaust gas in the workshop.
In the pharmaceutical factory, the distribution process of the whole set of equipment using low temperature plasma + composite photocatalytic purification of exhaust gas is: first, the exhaust gas source → the exhaust gas enters the activated carbon device and reacts with the odorous gas H2S. SW type high efficiency deodorant desulfurization → the exhaust gas enters the PM water The gas separator removes moisture → the reactor is decomposed in the plasma and photocatalyst, and the carbon dioxide and water are generated by the fan. The fan exhausts the exhaust gas that has reached the standard through the exhaust pipe.