Novel sludge resource gradient utilization method

Abstract

The invention relates to the technical field of comprehensive utilization (environmental protection) of resources, in particular to a novel sludge resource gradient utilization method. The technical scheme adopted by the invention is as follows: the method comprises the following steps: carrying out fine grinding treatment on collected sludge; jointly adding water, the sludge treated in the previous step and a suspending agent into a stirring tank, and fully mixing to prepare slurry; conveying the slurry into a pump pool, and then performing separation operation through a separation system, wherein the whole separation system adopts closed-loop circulation; and concentrating and filter-pressing the sorted silicate non-metal and metal regenerated material to prepare a filter cake. The method has the advantages that a brand new processing method is adopted, the sludge can be efficiently and thoroughly treated in a stepped treatment mode by adopting a step-by-step processing method, the processing cost is lower, the treatment effect is better, and the whole process is environment-friendly and pollution-free.

Description

technical field [0001] The invention relates to the technical field of resource comprehensive utilization (environmental protection), in particular to a new method for stepwise utilization of sludge resources. Background technique [0002] The S (7-12%) content in sludge (pickling sludge, phosphating sludge) is too high, which has a great impact on the environment, so it needs to be treated accordingly to make it more environmentally friendly. Small, and the general treatment method is to dry the sludge and roast it. Since this kind of sludge contains a large amount of silicate non-metals such as CaSO4 and CaOH, direct high-temperature roasting will lead to high cost, and it will be expensive during the disposal process. Severe corrosion of equipment and pipelines, high S content in the exhaust gas generated during the roasting process, resulting in unstable operation of the desulfurization system, high operating costs of the flue gas treatment system, etc. The overall cost...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a new method for the utilization of sludge resource cascade, which adopts a brand-new processing method, and can efficiently and thoroughly treat the sludge in a step-by-step processing method, especially for acid The treatment of washing sludge and phosphating sludge can efficiently obtain recycled metal materials and silicate non-metal materials, and can ensure better quality of the separated recycled metal materials and silicate non-metal materials. The process can complete the treatment of sludge at a lower cost. Compared with traditional processing and treatment, the cost is lower, the treatment effect is better, the whole process is pollution-free, and the equipment can avoid problems such as equipment corrosion during transportation, so that the equipment Longer life in processing and lower cost of use

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