Hangzhou Renhong Environmental Technology Co., Ltd. has achieved fruitful results in the field of waste incineration fly ash water washing technology. At present, it has designed and constructed 10 fly ash water washing engineering projects, demonstrating the company's mature technology and strong strength in this field.​

The company's fly ash water washing technology has significant advantages, with a water-ash ratio ≤ 1.5 and only one dehydration equipment used in the whole process. Through water washing separation, industrial salts such as calcium chloride, sodium chloride and potassium chloride in fly ash can be effectively extracted, and the washed fly ash can be used as cement raw materials or for producing ceramsite, glass bodies and sintered materials, realizing efficient resource recovery and reuse.​

From the engineering technology developed in 2015 to the integrated water washing equipment put into operation in 2023, Renhong Environmental has continuously upgraded its technology and equipment, establishing a solid technical barrier. The simplification of the process not only significantly reduces investment and operation costs, but also greatly improves the operating environment, setting a new benchmark for the industry development.