Equipment discussion: Titanium spiral tube heat exchangers are more suitable for heating brine

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Characteristics of application areas: heating of brine, heating of secondary brine, heating of refined brine, titanium heat exchangers, titanium steam-water heat exchangers, titanium spiral tube heat exchangers, titanium helical threaded tube heat exchangers； Chlor-alkali production is already a highly mature manufacturing process. In the brine heating stage of the saline processing unit, with the upgrade from diaphragm electrolysis to ion-exchange membrane electrolysis, the brine heating equipment has also been upgraded from the earlier venturi mixing heaters to titanium plate heat exchangers. This change is necessary to meet the requirements imposed by ion-exchange membranes regarding iron ion levels. Iron ions in brine can easily contaminate the resin towers; when they enter the electrolytic cell along with the secondary brine, they cause hydroxide ions to form iron hydroxide on the ion-exchange membrane, leading to an increase in voltage drop across the membrane and a reduction in current efficiency. It also increases the hydrogen content in chlorine, creating safety hazards ； To this end, during the overall process design, efforts were made to minimize the contact between brine and iron pipes and equipment. Additionally, the energy-saving method of direct steam mixing for heating was abandoned, as steam carries a large amount of iron ions during transportation; such mixing directly leads to an increase in the iron ion content in the brine ； The plate heat exchangers currently in use perform very well in low-temperature heat exchange applications, but for heating processes involving high-temperature steam, the aging of the gaskets between the plates of these heat exchangers remains a persistent problem ； Conventional tubular heat exchangers made of titanium are currently costly, have many dead zones, and both the initial investment in such equipment as well as subsequent maintenance entail significant expenses for businesses ； Spiral-wound heat exchangers exhibit very satisfactory performance in the field of steam-water heat exchange; they are also known as spiral-threaded tube heat exchangers. However, since their introduction to the market, they have been designed and manufactured using stainless steel tubes. Based on production experience, it is clear that stainless steel has extremely poor corrosion resistance in chlorinated solutions, not to mention during the heating of high-concentration saline solutions ； Now, by combining titanium materials with spiral tube heat exchangers and using titanium fine tubes in the design of such heat exchangers, it represents the best option for dealing with sub-optimal operating conditions ； Through research on the properties of materials and welding techniques, as well as careful design and numerous trial productions, our company has successfully developed titanium spiral-tube heat exchangers. Preliminary tests of these titanium spiral-tube heat exchangers have shown that their performance in steam-water heat exchange is different from that of stainless steel spiral-tube heat exchangers; they can therefore be used directly in production, helping manufacturing companies to reduce costs and expenses related to equipment investment and maintenance ； For specific operating conditions and production capacity, details can be discussed via WeChat ； Feel free to send me a private message whenever you need to ； Welcome to the Chlor-alkali Elite Exchange Forum* ；