It is very difficult to treat waste gas in pharmaceutical industry. Machinery and equipment must bear corrosive gas

[technical article of China Pharmaceutical network] environmental protection equipment for low-cost removal of organic waste gas discharged in the process of drug production has become the property of many pharmaceutical enterprises In the production process of pharmaceutical plants, the organic waste gas is usually accompanied by acid gas emission Therefore, the design of environmental protection equipment must be able to withstand the corrosive nature of acid gas, and can adapt to various organic substances that cause changes in system temperature (it is very difficult to treat the waste gas of pharmaceutical industry, and the machinery and equipment must bear corrosive gas.) it is very difficult to take action because of the particularity of pharmaceutical technology After a detailed evaluation of each supplier in the early stage, the plant chose engluo environmental protection technology (Shanghai) Co., Ltd to solve the problem of exhaust emissions The company combines the characteristics of organic components and acid gas in the waste gas, selects RTO (regenerative thermal oxidimer) regenerative incinerator + quench + scrub tower, which can remove the organic components and acid gas in the waste gas well Compared with other waste gas removal technologies, RTO can achieve a removal efficiency of more than 98% at a low operating cost Solutions when looking for air pollution treatment partners, drug manufacturers expect them not only to have necessary treatment experience, but also to achieve successful local performance projects The company is located in the United States, with more than 1800 sets of equipment in operation around the world The company has more than 100 sets of equipment in operation in China, and all of them have been highly praised by the owners According to the characteristics of volatile organic waste gas from pharmaceutical industry, such as complex composition, large concentration fluctuation and corrosion, different anti-corrosion measures need to be taken for waste gas treatment system, and LEL detector suitable for pharmaceutical industry should be installed to ensure the safety of gas transmission process The waste gas produced in the production process of the pharmaceutical factory is mainly various organic waste gas and organic compounds with chloride ions and sulfur ions The company uses a RTO regenerative incinerator with low fuel consumption to crack various organic waste gases into H2O, CO2, chloride ion and sulfur ion at high temperature, neutralize the acid ion through the NaOH solution in the scrubber, and then discharge clean air that meets the national regulatory standards through the chimney The system adopts RTO regenerative incineration system After the system is put into operation, the waste gas enters into heat storage tanks through three switching valves After high-temperature cracking in the combustion chamber, the efficiency is up to 98.5% After the heat of high-temperature gas is retained by 95% through the second heat storage tank, the clean gas with acid ions enters into the scrubbing tower system This process is controlled by three switching valves, and its cycle time is about 3 minutes The retained heat can preheat the exhaust gas to reduce the consumption of auxiliary fuel diesel and achieve the purpose of cost saving The NaOH solution is used in the scrubber After the gas with acid ions enters the scrubber, the acid ions are neutralized by NaOH solution, and then the clean air meeting the national regulations is discharged from the chimney This equipment has the following characteristics to ensure the stability, reliability and operation of the system: first, in most cases, the air flow is pushed into the RTO furnace However, this system is designed as induced draft negative pressure centrifugal fan This ensures that all waste gas can be sent to the furnace for treatment 2 The incinerator is composed of two reinforced heat preservation and heat storage tanks filled with high temperature resistant heat storage ceramics The incinerator uses natural gas to ignite the combustor to maintain the temperature in the furnace higher than the oxidation temperature of organic matters The system adopts the regenerative incinerator with natural gas as the auxiliary fuel The treatment efficiency of the system is more than 99%, and the heat recovery efficiency is 95% The control effect of the system can be achieved, and the system can maintain its own operation with only a small amount of fuel when dealing with low air volume All steps of Enguo equipment are controlled by PLC based automatic control system, which can reduce labor cost Another design considered by the owner is to use the fan of frequency converter control system to reduce the operation cost The frequency converter can change the actual operating power of the system fan according to the actual situation, which can save cost and make maintenance easier.