Rural household waste incineration method and device

Abstract

The invention discloses a rural household waste incineration method and device, and belongs to the technical field of waste disposal. The problems of rural household waste disposal at present are solved. The method comprises the steps that a circulating fluidized bed incinerator is used for incinerating dried waste with the moisture content being 15% or below, and water vapor released by waste drying is drawn to be injected into a hearth for cooling in the incineration process. The device comprises the circulating fluidized bed incinerator. A vapor inject-in port is formed in the side wall ofthe hearth of the circulating fluidized bed incinerator. A tubular heat exchanger, a vapor heater, a secondary air preheater and a primary air preheater are sequentially arranged in a tail flue of thecirculating fluidized bed incinerator. A vapor outlet of the vapor heater is connected with a vapor inlet of a rotary kiln roller dryer. The roller wall of the rotary kiln roller dryer is of a hollowrow tube structure. An inlet and an outlet of the tubular heat exchanger communicate with the two ends of the roller wall correspondingly. The rural household waste incineration method and device areused for waste disposal.

Description

technical field [0001] The invention belongs to the technical field of garbage treatment, and in particular relates to a method and device for incinerating domestic garbage in villages and towns. Background technique [0002] With the development of the country's economy and the improvement of people's living standards, the amount of household waste generated in villages and towns has also increased significantly, and the task of garbage disposal in villages and towns has become increasingly heavy. At present, there are obvious problems in the disposal of household garbage in villages and towns: [0003] Domestic waste in villages and towns contains plastics, paper, kitchen waste, etc., and the content of organic components is not high, so composting is of little significance, and incineration is generally used for treatment; the water content of domestic waste in villages and towns is relatively high, generally about 40-50%; the ash content is relatively high High, generall...

AI Technical Summary

Problems solved by technology

[0003] Domestic waste in villages and towns contains plastics, paper, kitchen waste, etc., the content of organic components is not high, and composting is of little significance, so it is generally treated by incineration; the water content of domestic waste in villages and towns is relatively high, generally about 40-50%; the ash content is relatively high High, generally around 20-40%; low calorific value, 2800-4400kJ / kg in different seasons; at present, grate incinerators are used to incinerate domestic waste in villages and towns, and the incineration temperature often does not reach 850 ℃ , resulting in incomplete combustion, the emission concentration of dioxin is not easy to reach the standard, the carbon content of ash and slag is high, and the ignition loss rate of ash and slag far exceeds the specified 5%, which does not meet the environmental protection requirements, and the auxiliary fuel of the grate furnace is usually light Oil, the price of light oil per ton is more than 6,000 yuan, and the operating cost is relatively high; the leachate produced by the garbage needs to be treated separately, which increases the complexity and cost of the domestic garbage treatment process in villages and towns

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