The common ways to dispose the household and MSW garbage are land filling, burning and manure mixture for fertilizing, and the land filling and manure mixture for fertilizing are not practical, because they need more space, the end products can not be widely used and the level of resource utilization is low. As for the burning, although it can achieve the goal of reducing the volume and the amount of the waste, it can still produce pollution, and the dioxin.
The pyrolysis technology is developed in recent years, and it was thought highly by the scientists home and abroad. They all think that the pyrolysis technology is a new invention, which can reduce the volume and amount of the waste, what’s more, it can also turn the waste into energy.
The pyrolysis method is totally different from the burning. The burning is a process that release heat, but the pyrolysis process needs absorb heat. After the burning process, we will get the carbon dioxide, but the end products of pyrolysis plant are combustible gas, fuel oil and carbon black.
Pyrolysis is a thermochemical decomposition of organic material at elevated temperatures in the absence of oxygen (or any halogen). It involves the simultaneous change of chemical composition and physical phase, and is irreversible. The word is coined from the Greek-derived elements pyro “fire” and lysis “separating”.
Pyrolysis is a type of thermolysis, and is most commonly observed in organic materials exposed to high temperatures. It is one of the processes involved in charring wood, starting at 200–300 °C (390–570 °F).[1] It also occurs in fires where solid fuels are burning or when vegetation comes into contact with lava in volcanic eruptions. In general, pyrolysis of organic substances produces gas and liquid products and leaves a solid residue richer in carbon content, char.
The waste pyrolysis plant makes the waste recycling easier, and the recycling process is harmless to the environment, so it is worthy investing.