Henan Youmai Food Co., Ltd. is part of the White Elephant Food Group and was established in 2013. It mainly develops, produces and sells "White Elephant" and "Youmai" brand noodles. Noodle drying process generally has rapid drying at high temperature, slow drying at low temperature, and medium-speed drying at medium temperature. Noodle drying is also the most invested and technically most productive process in the entire production line, and has a very important relationship with product quality and production cost. The occurrence of crispy noodles, tidal noodles, acid noodles and other phenomena in production are all caused by irrational drying equipment and technology. Therefore, White Elephant Food attached great importance to the purchase of boiler equipment for Xinzheng Factory. In 2017, White Elephant ordered 15 tph WNS condensing gas-fired boiler at ZOZEN. The front and rear smoke boxes of the boiler are filled with multi-layered aluminum silicate fibers and then insulated with high-temperature fire-resistant mud to increase the thermal resistance, effectively reduce the heat loss and improve the thermal efficiency.