It can consume any organic waste and convert into energy and removes risks associated with landfills. It can also consume all other wastes such as plastics, rubber, paper, agri waste products, bio medical, feedstock and numerous other waste which have calorific value. Glass and metal waste cannot be part of this process.
The pyrolysis process is a reaction process that breaks the chemical bond of organic polymer in feedstock in an anaerobic and high temperature atmosphere to release various volatile matters to produce carbide, retorting gas (H2, CH4, CO etc.) and coagulable liquid (tar, water, acid).
The core advantages of new MSW pyrolysis process independently developed by Shenwu Group include that the generation of dioxin and heavy-metal-bearing fly ash is eliminated at the source, and the emission index of other pollutants reaches the ultra-clean emission requirements of gas-fired boiler, therefore the cleanliness is very high. Furthermore, this process successfully achieves the large-scale, stable and continuous operation, and solves the world problem that MSW pyrolysis treatment technology cannot be performed in a large-scale and continuous industrial production manner. This process has also passed the scientific and technological achievement appraisal by MIIT, which is appraised as “An International leading process”.
The core equipment of the pyrolysis process is rotating bed. The circular chamber of rotating bed is divided into feeding zone, preheating zone, first reaction zone, second reaction zone, third reaction zone and discharging zone. The regenerative radiant tube is installed at both sides of furnace chamber of every reaction zone. The purified pyrolytic gas will be used to supply heat for the heating and pyrolysis of feedstock. The temperature of every reaction zone inside the furnace can be controlled by adjusting the gas and air supply amount of regenerative radiant tube to achieve optimal pyrolysis effect. The sorted and crushed MSW delivered from pretreatment shop will enter rotating bed, and rotate together with the hearth to pass through the above-mentioned zones in sequence. In this process, the MSW will undergo three stages, i.e. drying, volatile precipitation and polymer cracking. The pyrolysis flow can be described as “feeding – preheating – heating – oil and gas discharging – residual solid discharging”. By adjusting the rotation speed of hearth, the feedstock distributing thickness and heating time can be changed.
The main products of rotating bed include the oil and gas mixture and pyrolytic carbon, which are often called pyrolytic oil, pyrolytic water, pyrolytic gas and pyrolytic carbon. The pyrolytic oil, water and gas will enter the oil and gas separation unit in the form of mixed gas, while the pyrolytic carbon will be sent to boiler power generation unit.
