Therefore, in large and medium-sized cities with developed economy and more domestic garbage, it is the best choice to use advanced garbage incineration technology to treat urban garbage. In this paper, the forms and characteristics of garbage incinerators commonly used in China are compared.
Low temperature magnetized degradation furnace/garbage incinerator
I. Technology of Mechanical Grate Incinerator
There are many forms of mechanical grate incinerator according to the structure and movement mode of grate, but the combustion principle is basically the same. The garbage is burned in layers on the grate, and the ash is dried and burned before being discharged from the furnace. All kinds of grates will loosen the garbage layer in different ways, so that the garbage can fully contact with the air and achieve the ideal combustion effect.
household garbage
Second, the fluidized bed incinerator technology
Fluidized bed incinerator technology is also a mature technology, which mainly depends on the high heat capacity, strong mixing and heat transfer of high-temperature fluidized bed materials in the furnace, so that the garbage sent into the furnace can quickly heat up and catch fire, forming a uniform combustion of the whole bed. Fluidized bed incinerator incinerates garbage by fluidization technology. There are a lot of quartz sand as heat carrier in the furnace, and the garbage is suspended and burned in the furnace.
Treated negative ion ash
Third, rotary kiln incinerator technology
The furnace body of rotary kiln incinerator is a cylindrical cylinder with refractory bricks or water-cooled fireplace walls. Through the overall rotation of the furnace body, the garbage is evenly mixed and moves to the inclined end along the inclined angle. In order to realize the complete incineration of garbage, there are generally secondary combustion chambers. When burning garbage, the garbage is supplied from the upper part of the rotary kiln, and the cylinder rotates slowly, so that the garbage turns over and retreats continuously, and the garbage gradually dries, burns and burns out, and then is discharged to the slag discharge device.
Sorting very clean ashes.
Four, low temperature magnetized garbage pyrolysis furnace equipment
From 20 16, the biomass energy utilization project will be popularized, and the demonstration project of "distributed low-temperature magnetized garbage pyrolysis furnace equipment" will be established. Through distributed construction, low-temperature magnetized garbage pyrolysis furnace equipment uses pyrolysis cold discharge technology to treat garbage harmlessly in situ and convert it into clean energy. Domestic garbage decomposes automatically at low temperature, releasing organic heat energy to provide continuous reaction conditions, and decomposing water vapor and mineral ash at the same time, saving energy. The flue gas generated in the pyrolysis process is discharged after being treated by low-temperature wet flue gas purification technology, which will not cause secondary pollution. Pyrolysis is a necessary stage in any thermochemical treatment process. As an independent thermochemical treatment technology of solid waste, it has also developed to a certain extent in recent years.