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...

Examples

Embodiment Construction

[0014] Such as figure 1 As shown, a new cascade utilization method of sludge resource utilization, which adopts a new processing method, can efficiently and thoroughly treat sludge in a cascade treatment method and step-by-step processing method, and can efficiently obtain recycled metal materials And silicate non-metallic materials, and can guarantee the quality of the separated recycled metal materials and silicate non-metallic materials, the whole process can complete the sludge treatment at a lower cost, compared with the traditional The processing cost is lower, the processing 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 has a longer service life and lower cost during processing. It includes: 1) finely grinding the sludge collected from the sludge, with a particle size of -100 mesh ≥ 75%. Through this step, the overall fine grinding of the sludge can be ...

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...

Examples

Embodiment Construction

[0014] Such as figure 1 As shown, a new cascade utilization method of sludge resource utilization, which adopts a new processing method, can efficiently and thoroughly treat sludge in a cascade treatment method and step-by-step processing method, and can efficiently obtain recycled metal materials And silicate non-metallic materials, and can guarantee the quality of the separated recycled metal materials and silicate non-metallic materials, the whole process can complete the sludge treatment at a lower cost, compared with the traditional The processing cost is lower, the processing 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 has a longer service life and lower cost during processing. It includes: 1) finely grinding the sludge collected from the sludge, with a particle size of -100 mesh ≥ 75%. Through this step, the overall fine grinding of the sludge can be ...

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