The stainless steel metal plates of the plate heat exchanger adopt a mutually inverted mode during assembly. Thin rectangular channels are formed between various plates for heat exchange. Plate heat exchangers are also used to cool dilute acid. Powered wave scrubbers, cooling towers, fiber demisters and plate heat exchangers are used in the purification process of sulfuric acid. Its advantages are that it occupies a relatively small area, has a relatively compact structure, has great flexibility in operation, and has relatively small heat loss. However, there will be a lot of impurities in the dilute acid, which may cause the heat exchanger to be blocked.
The process gas from the plate heat exchanger flows downward in the power wave scrubber, and the circulating acid is sprayed upward. The two together form a foam zone, and the cooling of the gas is accomplished by evaporating the gas in the dilute acid. The material used in the rear part of the power wave scrubber is FRP. When the first-level equipment has a bad working condition, the high temperature process gas will cause the equipment to melt after entering the rear equipment. In the design, reasonable process parameters must be determined for this situation, and automatic chain control methods must be used to avoid this situation. A high-speed cylindrical demister is used in the device. This type of mist eliminator has a relatively simple structure, is more convenient to operate, and has a relatively high defogging efficiency. It can remove not only large particles of mist, but also relatively fine mist.