Low-temperature heat recovery from sulfuric acid
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Recently, low-temperature heat recovery using sulfuric acid has become popular. I did some research on it and found that no specific details are provided regarding its manufacturing process; only high control requirements are specified, and the instruments needed are special ones that may not be available in China. There is one device I have never managed to figure out, namely the sulfuric acid diluter. As is well known, sulfuric acid reacts very rapidly with water, releasing a large amount of heat. The materials used for the equipment must be able to withstand both high temperatures as well as dilute and concentrated sulfuric acid. Moreover, such rapid heat release can easily cause liquid to boil inside the equipment, resulting in phenomena similar to tsunamis. I’m not sure what kind of structure such a device should have. Do any of you have any good ideas? Let’s discuss it together.
Haha, we’ve inspected it several times; we only saw its appearance – it’s a device used for eating, and it’s patented. Not just anyone can create one; otherwise it wouldn’t be valuable.
A sulfuric acid diluter is essentially an acid-water mixer, which is a container lined with stainless steel and covered with PTFE
After one year of operation of a new unit installed by our company, the pressure difference across the demister in the drying tower increased to 10 Kpa; the air delivery capacity of the main fan decreased significantly, and the system could not achieve the required load. The demister uses Brink metal mesh; what are some good designs for air filters?
Our company has a sulfuric acid production plant, with the ash content of pure sulfur at 10 ppm. What is considered a normal rate of increase in catalyst resistance?
How is the operation of domestically produced low-temperature heat recovery units for sulfuric acid? In the systems that have been in use for the past 3 years, have there still been instances of leaks, particularly those related to low-temperature heat recovery, such as boilers, samplers, acid coolers, preheaters, and heaters?
The material specified for this diluter is not some ordinary alloy; it should be a lined material, otherwise the corrosion caused by dilute sulfuric acid is severe, while that caused by concentrated sulfuric acid is oxidative corrosion – a single alloy material cannot withstand such conditions