System for pyrolyzing and burning sludge at low temperature

Abstract

The invention discloses a system for pyrolyzing and burning sludge at low temperature, which comprises a sludge hopper, a dryer, a spiral conveyer, a low-temperature pyrolysis reactor, an extrusion moulding machine, an incinerator and a draught fan, wherein the spiral conveyer is used for conveying the sludge output from the sludge hopper to a feed inlet of the dryer; the low-temperature pyrolysis reactor is connected with a discharge port below the dryer; the extrusion moulding machine is connected with the discharge port of the low-temperature pyrolysis reactor; the incinerator is connected with the extrusion moulding machine through a conveyer and is provided with a waste heat boiler; the draught fan is connected with the waste heat boiler; and the upper part of the waste heat boiler is respectively connected with the dryer and the low-temperature pyrolysis reactor through waste heat input pipelines. After the dewatered sludge is dried and pyrolyzed at low temperature, the amount of the sludge entering the incinerator is reduced, thereby reducing the volume of the incinerator, greatly lowering the energy consumption and reducing the investment cost; the cost of manufacture, installation, operation and maintenance of an incinerator system is greatly reduced; and because the equipment investment is reduced, the system is convenient for dispersive treatment of sludge and has wide adaptability.

Description

technical field [0001] The invention relates to environmental protection equipment for sludge treatment, in particular to an environmental protection equipment for sludge incineration treatment. Background technique [0002] With the continuous improvement of urban sewage treatment capacity and sewage treatment rate, the sludge output of sewage treatment plants has also increased, and the problem of secondary pollution caused by sludge has become increasingly prominent. The world's sludge treatment methods mainly include sanitary landfill, biological composting, re-fermentation biogas power generation, dry incineration and other methods. Among them, the dry incineration process is the most widely used. First, incineration can greatly reduce the volume of sludge. Compared with mechanically dewatered sludge, the volume of the final incineration product is only 10% of the initial product. Second, incineration can also kill all pathogens. All organic matter will be decomposed ...

AI Technical Summary

Problems solved by technology

[0007] In order to solve the technical problems of complex equipment, high energy consumption, large maintenance, low efficiency and high cost in the existing sludge drying and incineration process, the present invention proposes a pulping equipment that does not require pulping equipment, has low energy consumption and low failure rate. , high production efficiency, simple, reliable and investment-saving low-temperature pyrolysis and incineration system for sludge

Images