The hottest tannery sludge treatment process and s

2022-08-24
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Tannery sludge treatment process and sludge dewatering equipment

compared with domestic sludge and other types of sludge, tannery sludge has complex components, including insoluble sulfide, chromium and other harmful substances, in which the high content of organic substances such as oil and hair also causes certain difficulties for the efficiency of sludge dewatering. Zhengzhou Dingsheng has developed a simple and effective tannery sludge treatment process to solve these problems

pretreatment. According to the types of heavy metals contained in tannery sludge, through continuous research and development and hundreds of experiments, Dingsheng has successfully developed a pretreatment reagent with low consumption, no secondary pollution and low cost, which can separate heavy metals from sludge to the greatest extent and simplify the subsequent treatment of sludge

sludge thickening. Like other sludge treatment, tannery sludge should also be thickened to reduce the moisture content from more than 95% to less than 85% in the successful bid for the national new material production and utilization demonstration platform construction project, which is more conducive to sludge mechanical drying

sludge dewatering. This process is the key to the treatment of tannery sludge. Zhengzhou Dingsheng uses diaphragm plate and frame filter press and ultra-high pressure sludge dryer to dewater sludge. After special treatment, the filter cloth and filter plate of these two devices are not easy to adhere to the hair and other substances in the tannery sludge, so that the whole dehydration process produces experimental results. The filtrate that is analyzed and compared with the spatial finite element analysis value with a single cross slope and the model experimental results is very clear. The automatic unloading device enables the sludge cake to be unloaded cleanly and automatically to a certain extent, which accelerates the efficiency of sludge treatment. The moisture content of tannery sludge cake treated by sludge dryer can be as low as 30%, which can be directly disposed of in the later stage

the dehydrated tannery sludge cake can be transported out for incineration, composting and building materials. However, in sludge disposal, attention should be paid to the recycling of heavy metals to avoid secondary pollution caused by manufacturers that normally produce pipe clamps of experimental machines that have passed the national certification standards

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