Thread Content
Project background: In January 2019, Wuxi Linghang Filter Equipment Co., Ltd. signed a contract with Honghong Paper Group (Jining) regarding the use of shallow sand filters in a side filtration system, with a total water flow rate of 31,000 m3/h. Industry impact: Wuxi Linghang Filtration Equipment Co., Ltd. is a new-type enterprise dedicated to the research, development, and production of shallow sand filters and cartridge filters. The signing of this project contract marks the official entry of Wuxi Linghang Filtration Equipment Co., Ltd.’s shallow sand filters into the domestic heavy-duty papermaking industry. Design of shallow sand filters: Electrical control – Wuxi Linghang Filtration Equipment Co., Ltd. (hereinafter referred to as Linghang Filtration) achieves full automation of the overall operating system of shallow sand filters. It displays in real time important parameters such as inlet and outlet water pressures, pressure differences, temperature, flow rate, and turbidity. These data are transmitted to the operator’s control room via DCS, with no signal interference and an accuracy error of one in a thousand. Mechanical design – In view of the special water quality requirements in the papermaking industry, the water distribution and collection devices of shallow sand filters are creatively designed with 90-degree bends to ensure adequate distribution of water as well as efficient collection of the treated water. The material used for these components is a wedge-shaped wire mesh, featuring a thicker outer layer and a thinner inner layer, which helps to overcome common wear issues and significantly extends their service life. Construction difficulty——Due to the harsh site conditions, the employees at Linghang Filter overcame numerous difficulties and used traditional methods, relying on manual labor to complete the installation, which won unanimous recognition from the client. As a token of gratitude, the relevant officials personally provided safety helmets and other necessary equipment for our company’s employees.