Effective dewatering of box filter press helps sludge “transform into” green building materials

     With the improvement of people’s awareness of environmental protection, sludge, as a kind of pollutant with no small harm to the environment, has attracted more and more people’s attention on the importance of its recycling disposal. Doyen chamber filter press realizes deep dehydration of sludge, ultra-low moisture content, and effectively helps sludge “transform into” green building materials!

     Using sludge to make ceramsite is a kind of sludge environmental protection disposal method vigorously promoted by the Communist Party of China in recent years. Through deep dehydration of sludge, the sludge forms a mud cake with low moisture content, and then it becomes a valuable resource product ceramsite through a series of disposal processes. Ceramsite is a new type of green building material, which is the renewal product of many traditional building materials. Its main raw materials are tailings and slag produced in the mining area, solid waste produced in the factory, sludge produced in the sewage treatment plant, etc.

sdr

     As the internal structure of ceramsite is porous, it has the characteristics of small density, high strength, good insulation effect, fire prevention, frost resistance, bacterial corrosion resistance, good seismic resistance and good construction adaptability. Therefore, ceramsite can be used in building insulation concrete, structural insulation concrete, high-temperature structural concrete, ceramsite hollow brick, etc.; it can also be used in building fields such as road, bridge and culvert, dike and water pipe; and even It can be used in agriculture, heavy soil improvement and soilless cultivation base material. The use of sludge in ceramsite production can not only effectively solve the increasingly serious problem of sludge production growth in urban sewage plants, but also achieve environmental protection goals and huge economic benefits.

     At present, there are mainly two kinds of processes for making ceramsite from sludge, one is the process of granulating and sintering with incineration ash of raw sludge or anaerobic fermentation sludge, the other is the new process of making ceramsite directly from dewatered sludge.

     In comparison, the former needs to build an incinerator alone, and the organic components in the sludge are not effectively used, not only the investment is large, but also the process is tedious, which is not economic and practical. The latter uses the sludge after deep dehydration as the main raw material, adding a certain amount of auxiliary materials and additives, decarbonizing and sintering to make light ceramsite with certain strength,, It can consume a lot of dewatered sludge, not only the treatment cost is much lower than that of incineration, but also can avoid the secondary pollution of sludge, especially in line with the principles of harmless, reduction and recycling of solid waste treatment in China, which has a broad development prospect.

      However, it is not so simple to make ceramsite directly from dewatered sludge. This process has strict requirements on the moisture content of dewatered sludge. At present, most of the sludge dewatering equipment on the market are difficult to meet the demand of only making ceramsite. At the beginning of research and development, longvan filter press aims at the deep dehydration of sludge. Through the high-pressure filter press system of the equipment, the filter plates of the equipment are closely arranged in a row under the action of high-strength mechanical force. A filter chamber is formed between the filter plates and the filter plates. The sludge is sent into the filter chamber under strong positive pressure. After being squeezed, the mud cake is formed and retained in the filter chamber. The liquid part passes through the filter medium Discharge the filter chamber to achieve the purpose of solid-liquid separation.

      Doyen specializes in providing belt press equipment for the Southeast Asian market. Welcome to visit our workshop, according to the actual situation of your company, develop a more scientific dehydration program.Welcome to joyce@doyenchina.com or visit https://www.doyenchina.com.