Waste incineration power generation is the waste incineration plant and waste incineration equipment introduction, digestion, absorption and re-innovation work. Dioxin in the flue gas of domestic waste incineration is a common concern of the world in recent years. Dioxin-like highly toxic substances cause great harm to the environment, effective control of the generation and spread of dioxin-like substances, directly related to waste incineration and waste-to-energy technology promotion and application.

Principle of operation

The source of dioxin generation in the incinerator is petroleum products, chlorine-containing plastics, which are the precursors of dioxin. Generation mode is mainly combustion generation. Household waste contains a large amount of NaCl, KCl, etc., and incineration of the material will often have S elements, thus generating. In the presence of oxygen, HCl is generated by reacting with salts containing the element Cl. HCl reacts with CuO generated by oxidizing Cu to generate HCl. It has been found that the most important catalysts for the production of dioxins are and elemental C (in terms of CO).

Controlled gas pyrolysis incinerator will be incinerated into two combustion chambers, a combustion chamber for thermal decomposition of garbage temperature control for 700 ℃ or less, so that the garbage in the state of anoxic low-temperature decomposition, when the metal Cu, Fe, Al and other metal elements will not be oxidized, and therefore there will be no generation of dioxin will be greatly reduced in the amount of; at the same time, due to the amount of HCl production by the residual oxygen concentration of the impact of the amount of HCl, and therefore, anoxic combustion will reduce the amount of HCl, and therefore the amount of HCl will be reduced. At the same time, because the amount of HCl production is affected by the residual oxygen concentration, the anoxic combustion will reduce the production of HCl; and it is difficult to generate a large number of self-reducing atmosphere. Since the gas-controlled waste incinerator is a solid bed, no soot will be produced and no unburned residual carbon will enter the second combustion chamber. The combustible components in the garbage are decomposed into combustible gases and introduced into the second combustion chamber where there is sufficient oxygen for combustion. The temperature of the second combustion chamber is about 1000℃ and the length of the flue enables the flue gas to stay for more than 2s, which ensures that toxic organic gases such as dioxins are completely decomposed and burned at high temperatures. In addition, the use of bag filter can avoid the use of electrostatic precipitator Cu, Ni, Fe particles on the generation of dioxin catalytic effect.