Automated production of spray-type ammonium sulfate saturator

Thread Content

There are yet no examples of fully automated production processes for spray-type ammonium sulfate saturators. In my opinion, full automation is theoretically possible; the key lies in addressing the following critical issues. Since it is not clear whether the relevant equipment and technologies can meet these requirements, I hope everyone will discuss this topic so that we can learn together. First, let’s introduce the production process: In coking plants, ammonium sulfate is produced by allowing ammonia from coal gas to enter a saturator, where it reacts chemically with a mother liquor containing sulfuric acid to form ammonium sulfate, which then dissolves in the mother liquor. When the concentration of ammonium sulfate in the mother liquor reaches saturation, ammonium sulfate crystals begin to precipitate. These crystals are then separated by centrifugation, dried, weighed, packaged, and stored in the product warehouse. 1. When the crystal ratio in the ammonium sulfate mother liquor in the lower section of the saturator reaches 25%-40% (v%), a crystal ratio detection device is added and linked to the crystallization pump, thereby enabling automatic pumping of the slurry at the bottom to the indoor crystallization tank. A pressure sensor can be added to determine the crystal ratio by detecting weight changes, and a pressure range can be set to control the on/off operation of the crystallization pump. 2. Add an online pH monitoring device for the mother liquor to control the opening degree of the addition valve, thereby enabling automatic acid addition. 3. Install pressure sensors at the bottom of the crystallization tank; these sensors convert pressure changes into information regarding the amount of ammonium sulfate crystals that have accumulated. The set values are linked to the operation of the valves at the bottom of the crystallization tank, as well as to the start and stop of the equipment used for handling ammonium sulfate and the dryer, thereby enabling the centrifugal separation and drying of the ammonium sulfate slurry. 4. The dried ammonium sulfide crystals are transferred to a storage tank, where they are automatically weighed and packaged using established, mature technologies. Based on the above analysis, let’s discuss whether this theory can be realized What else is lacking?