Altop Ammonium Stripper

The system consists of the following main components:
- Scrubber 1
- Scrubber 2
- stripper vessel
- Process water supply by means of valve ABV403
- Acid dosing by pump PU501
- Ammonium sulphate removal by pump PU303
Objective: neutralise ammonia vapour generated in the stripper. Sulphuric acid dosing will convert ammonia into ammonium sulphate. The ammonium sulphate will be pumped to an external storage tank by means of pump PU303. The acidity in the scrubber will be controlled by a pH measurement. Ammonium sulphate pumping is controlled by level measurement LT301, pH measurement and/or conductivity measurement QT301. Both scrubbers are operated continuously. Circulation pumps PU301 and PU302 are thus operated continuously with the exception of various safety devices. The air is circulated by means of fan FAN201. The starting point is clean air on the suction side of the fan ( i.e. washer stage 2, scrubber 2 ). The air is blown through the stripper. A reaction takes place in the stripper where ammonia is released. The contaminated air is led to scrubber 1, where most of the ammonia is removed. Next, the air is led to scrubber 2. This stage has to remove any residual ammonia in the air. After scrubber 2 ( wash stage 2 ), the starting point is again clean air blown through the stripper. Cycle repeat again. So this too is a continuous process.