Device of incinerating sludge with household waste

Abstract

The invention belongs to the field of garbage treatment and provides a device of incinerating sludge with household waste. The device comprises an incinerator and a fuel nozzle, wherein the incinerator is provided with a hearth, a fire grate is located in the hearth, and household waste is incinerated on the fire grate; and the fuel nozzle located above the fire grate in the hearth is used for dispersing dry sludge particles to the hearth of the incinerator and fully mixing the dry sludge particles with air. The device of incinerating sludge with household waste provided by the invention can be used for treating municipal sludge on a large scale by making full use of heat energy released by combustion of household waste, so that the doping proportion of sludge is improved. The sludge doping amount can be adjusted in real time according to the combustion condition in the incinerator, so that the utilization ratio of energy and the sludge treatment efficiency are improved.

Description

technical field [0001] The invention belongs to the field of garbage treatment, and in particular relates to a domestic garbage cooperative incineration sludge device. Background technique [0002] By the end of 2015, the rate of harmless disposal of urban sludge was 53%, and that of county sludge was 24.3%. The "13th Five-Year Plan" National Urban Sewage Treatment and Recycling Facilities Construction Plan requires that by the end of 2020, the harmless disposal rate of urban sludge will reach 75%, and the harmless disposal rate of county sludge will reach 60%. The scale of sludge harmless disposal facilities increased from 37,400 tons / day at the end of 2015 to 97,500 tons / day at the end of 2020. The form is relatively severe, and the development pressure is relatively high. [0003] At present, the moisture content of the excess sludge produced by domestic municipal sewage treatment plants is generally 75% to 80% after mechanical dehydration, and 75% is almost the limit t...

AI Technical Summary

Problems solved by technology

[0008] Since most of the current sludge co-combustion is to mix the sludge and domestic waste in the garbage pool, or spray the sludge directly into the feeding hopper, both of these methods have uneven mixing of sludge and domestic waste.

It takes about 1 to 1.5 hours for domestic waste and sludge to enter the hopper and be pushed to the combustion zone for combustion. Once the calorific value of domestic waste is too low or the proportion of sludge in some areas is too large, the temperature of the furnace will drop , and then there will be a serious lag in adjusting the proportion of sludge co-firing

[0009] The direct incineration of sludge with a moisture content of 75% to 80% after mechanical dehydration requires a large amount of fuel; direct incineration with domestic waste has a greater impact on the furnace temperature, and the proportion of treated sludge is too small, which cannot meet the current requirements for sewage. The scale of mud treatment urgently needs to increase rapidly, and it does not meet the requirements of technological development and social progress

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