A kind of sludge clean incineration heat exchange method

Abstract

The invention discloses a sludge clean incineration heat exchange method. The method comprises the following steps: a, reducing the water content of sludge to 18-35%; b, burning the dried sludge; c, carrying out primary oxygen supply to the sludge; d, performing secondary oxygen supply above the sludge to burn combustible gas generated by the sludge; e, enabling one part of the hot flue gas generated after sludge incineration to heat and dry the sludge in the step a, and the other part of the hot flue gas to heat air for primary oxygen supply in the step c and secondary oxygen supply in the step d; f, dividing the hot flue gas for heating the sludge in the step e into two paths, specifically, one path is mixed with air for primary oxygen supply, and the other path is mixed with air for secondary oxygen supply; g, heating the air for primary oxygen supply and secondary oxygen supply in the step e to form tail gas, and discharging the tail gas after smokeless treatment; and h, discharging ash generated after the sludge is completely incinerated and then recovering the ash. The sludge clean incineration heat exchange method effectively improves combustion capacity and effect and savesenergy.

Description

technical field [0001] The invention belongs to the field of sludge treatment, and in particular relates to a sludge cleaning and incineration heat exchange method. Background technique [0002] The treatment method with incineration as the core is the most thorough treatment method for solid waste. It can completely carbonize organic matter, kill pathogens, minimize the volume of sludge solid waste and realize energy recovery and utilization, and solve the problem of sludge solid waste. Finally deal with the problem. [0003] my country's sludge solid waste, such as municipal sludge, papermaking sludge, printing and dyeing sludge, etc., has low organic matter content, low calorific value, high moisture content, and is difficult to burn. The grate type incinerator mainly supplies heat through unilateral radiation, which is difficult to achieve full combustion of sludge solid waste, and the combustion efficiency is low; the internal materials of the rotary kiln incinerator c...

AI Technical Summary

Problems solved by technology

However, in the process of fluidized bed incineration, high-pressure air is distributed, the equipment consumes a lot of power, and the operating cost is high. During the incineration process, the material is easily taken away by the air flow, and the amount of fly ash produced is huge, which is about 10%-15% of the raw materials entering the furnace. Increase follow-up equipment investment cost and processing pressure

Fluidized bed incinerators have high requirements on the uniformity of fuel particle size, and require high-power crushing devices. The inert material quartz sand causes serious wear and tear on the equipment, and continuous waste of bed materials is required.

Large amount of equipment maintenance, high operating costs, and high equipment investment costs

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