We know that steam boilers are commonly used in the textile printing and dyeing industry because a large amount of steam is required to cook products during the textile process. Steam is used in the production process for desizing, boiling, rinsing, alkali steaming, pad dyeing, high-temperature and high-pressure overflow dyeing, jigging, printing steaming, drying, heat setting, continuous or periodic boiler blowdown, water film dust removal, and other processes. Boiler energy mainly uses electricity, fuel oil, gas, steam, etc. But textile mills also use waste heat boilers. Because the textile industry is a highly polluting industry, with severe wastewater discharge, high treatment difficulty, and low reuse rate of wastewater, printing and dyeing enterprises discharge wastewater containing impurities at a temperature of up to 100 ℃ every day. Previously, these wastewater were directly discharged into a cooling pool, cooled, and then sent to a biochemical tank for treatment. After reaching the standard, they were discharged into the sewage pipe network. This not only causes a large load on the cooling pool, but also wastes the hot water in vain.

Jamuna Group in Bangladesh is a large enterprise mainly engaged in the processing and sales of various types of textile fabrics, with over 500 employees. In late 2022, the company's project leader contacted Xinli Boiler's sales manager to order a waste heat boiler for the company's production line, improving production efficiency and reducing production costs. After a detailed understanding of the company's needs, Xinli Boiler's technical team customized a Q18-395-3.0-1.0 waste heat boiler for them. This waste heat boiler is mainly used for the secondary utilization of waste water heat energy in the desizing, boiling, bleaching, and mercerizing washing stages, as well as the reuse of some waste water, with a maximum heat recovery efficiency of 90%. Moreover, the system has small floor area, low energy consumption, and simple maintenance. Based on normal factory production, the investment in equipment can be recovered within a few months of using this system.

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