CN101224330A

CN101224330A - Processing method of domestic waste

Info

Publication number: CN101224330A
Application number: CNA2006101675419A
Authority: CN
Inventors: 郭涵
Original assignee: Individual
Current assignee: Individual
Priority date: 2006-12-26
Filing date: 2006-12-26
Publication date: 2008-07-23

Abstract

The invention discloses a processing method used for household garbage. The method can be used for avoiding flue gas desulfuring and denitrating devices required by the traditional burning method and also avoiding the dust-solidifying process. The invention is realized through the following technical proposals that the household garbage is fed into a burning furnace in which the combustion is supported by coal and oil; high temperature flue gas generated by burning is induced into a raw-material mill from a mill head of a cement plant through pipes; the high temperature flue gas exchanges heat with the materials in the mill to evaporate water in the materials and acid gases and residual heavy metals and harmful matters in the flue gas are effectively solidified through chemical and physical reactions with the materials in the mill at the same time; dust gases vented from the mill tail is filtered through a bag-styled dust collector and then is discharged into atmosphere; the dust collected by the dust collector can be directly discharged into a raw-material storing tank as a component of the raw-material storing tank, and the slag of the burning furnace also can be used as material for cement production.

Description

A kind of processing method of house refuse

Technical field

The invention relates to the processing method of house refuse, more particularly, is about handle a kind of method of house refuse with the burning mode.

Background technology

At present handle house refuse with the burning mode, method in common is: burn away the refuse with incinerator, the high-temperature flue gas of generation is used for generating or heating, pass through desulfurization, denitration and the dedusting of flue gas again after, the flue gas that purifies is entered atmosphere.The slag that incinerator produces carries out landfill disposal, and the dust that dust-precipitator is collected is because residual more heavy metal must be through solidifying processing.Present stage China's city garbage specification rate low, moisture is high, calorific value is low.Huge with the equipment that this traditional burning mode is handled house refuse, cost an arm and a leg, the operating cost height, and cause secondary pollution easily.

Summary of the invention

The objective of the invention is to overcome the shortcoming of prior art, provide a kind of improved handle the method for house refuse with the burning mode.Utilize this method can significantly reduce the complexity of equipment, reduce operating cost, avoid causing secondary pollution.

The present invention is achieved by following technical proposals: the house refuse input is had in coal and the oily combustion-supporting incinerator, the high-temperature flue gas that produces is introduced raw mill by pipeline from the bistrique of cement plant raw mill, material carries out heat exchange in heat that high-temperature flue gas carries and the mill, make water evaporates in the interior material of mill, play the effect of oven dry material, while acidic gas in flue gas and residual heavy metal, harmful organic substance, effectively be fixed up by chemical reaction and physical absorption with the interior material of mill, the dusty gas that raw mill mill tail is discharged enters atmosphere after purifying by sack cleaner or electrostatic precipitator, the dust that deduster is collected can directly enter raw material to be stored up, as the part of raw material.But the slag instead of part clay that incinerator produces is as the raw material of producing cement.

Life refuse processing method of the present invention is compared with prior art, its beneficial effect is: cancelled complicated flue gas desulfurization, denitrification apparatus, also having removed simultaneously the dust-precipitator dust from must be through solidifying the link of handling, and the waste residue that incinerator produces no longer carries out landfill, but as the raw material of producing cement.

The specific embodiment

The invention will be further described below in conjunction with the specific embodiment;

Before burning away the refuse, earlier the fire box temperature of incinerator is heated to 900 ℃ with coal burning way, restart the rubbish propulsion plant, with the shifting onto on the reciprocating fire grate in the incinerator burner hearth slowly of the rubbish in the funnel, reduce the coal supply amount in burner hearth simultaneously, rubbish passes through drying, burning until after-flame.The fire box temperature of control incinerator is 850 ℃, when being lower than this temperature, suitably reduces the rubbish amount of pushing, and increases the assistant coal amount or sprays a spot of fuel oil.The high-temperature flue gas that incinerator produces is connected to the charging aperture place of raw mill bistrique by the pipeline of the welded steel plate of inner lining refractory, at this moment the negative pressure value of bistrique must not be lower than 400Pa, wind speed 2m/s in the mill, 65 ℃ of mill tail exhaust tube EGTs, mill tail exhaust tube connects the inlet of sack cleaner or electrostatic precipitator, the outlet of sack cleaner, the inlet of connection air-introduced machine, the air-introduced machine outlet is connected with chimney.The waste gas that enters atmosphere from chimney can reach the requirement of China " consumer waste incineration pollution control criterion " (GB 18485-2001).The dust of collecting from sack cleaner is sent to the raw material grain bin by the reamer type conveyer.The slag that incinerator produces is sent to raw material by conveying device to be stored up, as the Cement Production raw material.So far finished the processing procedure of house refuse.

Claims

1. the processing method of a house refuse, it is characterized in that: the house refuse input is had in coal and the oily combustion-supporting incinerator, the high-temperature flue gas that produces is introduced raw mill by pipeline from the bistrique of cement plant raw mill, material carries out heat exchange in heat that high-temperature flue gas carries and the mill, make water evaporates in the interior material of mill, while acidic gas in flue gas and residual heavy metal, harmful organic substance, effectively be fixed up by chemical reaction and physical absorption with the interior material of mill, the dusty gas that raw mill mill tail is discharged enters atmosphere after purifying by sack cleaner or electrostatic precipitator, the dust that deduster is collected can directly enter raw material and store up, as the part of raw material, but the slag instead of part clay that incinerator produces is as the raw material of producing cement.

2. life refuse processing method according to claim 1, it is characterized in that keeping in the incinerator operating temperature is 65 ℃ of wind speed 2m/s in 850 ℃, raw mill bistrique negative pressure 400Pa, mill, mill tail EGTs.