Process and Unit for Recycling of Formaldehyde-Containing Solid Wastes by Pyrolysis

Abstract

The unit for recycling formaldehyde containing solid waste by the method of medium-temperature dry pyrolysis with multistage pyrolysis gas purification system was proposed. Purification is carried out first in a catalyst cartridge, then in a dry cyclone, then in a scrubber, and at the final stage in a cold plasma unit. There original designs of chamber of thermal decomposition of wastes with variable, depending on loading, volume and with pre-heating chamber were proposed. On the example of recycling of waste of wood-chip boards, it is shown that the degree of waste processing in it is 98.1%, while the mass concentration of harmful substances in the air of the working zone does not exceed the MPC of the working zone and MPC of settlements. It was established that the proposed technical solutions not only make the process safer, but also improve it from the point of view of energy and resource saving.