Breaking and pyrolyzing device for recycling sludge and breaking and pyrolyzing technology recycling sludgetherefor

The invention relates to a breaking and pyrolyzing device for recycling sludge and a breaking and pyrolyzing technology for recycling the sludge. The technology comprises the following steps of: dedusting smoke generated by the burning of in a hearth by a cyclone separator, mixing with hot wind heated by an air preheating device to enter into a fan grinder, wherein the temperature of the mixed hot wind is 250-350DEG C, drying, breaking and pyrolyzing the sludge in the fan grinder, charging into a reburning region of the hearth throughby a static classifier to be burnt, and charging the pyrolysis-generated gas into the reburning region of the hearth through a combustible gas pipeline to form into a reducing atmosphere under the condition that the excess air coefficient is less than 1, so that restore the nitric oxide generated by a main burning region can be restored, and realize the reburning denitration can be realized. According to the deviceinvention, the recycling of the sludge can be realized, the volume size of the sludge can be greatly reduced in the manner of burning, all pathogens can be killed, and the pathogens are hardly available in the burnt residue by means of high-temperature treatment, and so that the problem of the foul smell of the sludge can be thoroughly solved. Meanwhile, according to the invention, the discharge of nitric oxide can be controlled.