Method for rapid recycling of sludge

Abstract

The invention discloses a method for rapid recycling of sludge. The method comprises the following steps that: (1) raw material sludge is conveyed into a physicochemical preprocessor to prepare with water; (2) the prepared sludge is conveyed to an oxidation reactor through a heat exchanger, simultaneously oxygen is feed into the oxidation reactor, and the sludge and the oxygen are subjected to a part wet oxidation reaction in the oxidation reactor; (3) high-temperature materials and gas are obtained from the part wet oxidation reaction, with the gas being discharge and the high-temperature materials being inputted to the heat exchanger; (4) the high-temperature materials enter into a forced filter after passing through the heat exchanger, and concentrated materials obtained from the forced filter enter into an activating reactor to take an activation reaction; and (5) the activated materials enter into a puffing device to puff, and the puffed materials enter into a centrifuge to separate solid and liquid, thereby realizing the rapid recycling of the sludge. According to the method provided by the invention, the processed products is relatively easy to separate solid and liquid, specific filtration resistance is relatively small, and the product is free of toxicity and stink, and can be used as soil amendment and landscaping fertilizer or compost raw materials, etc.

Description

technical field

[0001] The present invention relates to a rapid sludge recycling method, in particular to a sludge rapid treatment method suitable for harmless, reduction, and resourceful treatment of sludge produced in municipal sewage treatment plants, belonging to the field of sewage treatment . Background technique

[0002] A large amount of sludge produced by urban sewage treatment plants has a high moisture content, is perishable, has a strong odor, and contains a large number of pathogenic bacteria, parasite eggs, heavy metals such as cadmium, chromium, lead, mercury, and toxic, harmful and carcinogenic substances that are difficult to degrade. If not handled properly, it will cause direct or potential pollution to the environment.

[0003] In my country, urban sewage treatment plants are in the peak period of construction. With the improvement of sewage treatment rate, the amount of sludge produced will inevitably increase significantly. After the sludge that has n...

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