New process for treating solid waste by taking thermal conditioning as secondary and pyrolysis as primary

Abstract

The invention discloses a new process for treating solid waste by taking thermal conditioning as secondary and pyrolysis as primary. The core process of the common pyrolysis method comprises drying and pyrolysis; drying equipment reduces the water content of the solid waste to 25-30 percent, and the solid waste is conveyed to a pyrolysis system for pyrolysis; and the method has the problems that capillary water and bound water in the solid waste are hardly removed in short time, and when the water content of the solid waste is high, the energy consumption of a drying process is high. In order to solve the problem that the energy consumption of the drying process is high in the conventional pyrolysis method, a thermal conditioning reactor is arranged before the drying process, the solid waste is conditioned through high temperature and high pressure, and particles and the cell structure of the solid waste are damaged, so that the capillary water and bound water are easily dissolved out; and therefore, the dehydration performance is enhanced, the water content of the solid waste entering a drying furnace is reduced and the energy consumption of the drying furnace is low. Compared with the conventional drying pyrolysis method, the whole set of process has the advantage that the energy consumption for treating the solid waste is reduced by 30 to 40 percent.

Description

technical field [0001] The invention belongs to the technical field of energy and environmental protection, and relates to a new solid waste treatment process supplemented by thermal conditioning and mainly pyrolysis. Background technique [0002] With the growth of the economy and the improvement of people's consumption level, the output of solid waste increases accordingly. Solid waste is the most difficult to dispose of among the "three wastes". The goal will be more difficult. Currently, solid waste treatment methods mainly include compaction, crushing, sorting, solidification, incineration, and biological treatment. Pyrolysis is a safe, environmentally friendly and fast solid waste treatment technology. Its core process is drying and pyrolysis. Drying equipment generally reduces the moisture content of solid waste to 25-30% and then sends it to the pyrolysis system. , but the capillary water and bound water in solid waste are difficult to dry and remove in a short time...

AI Technical Summary

Problems solved by technology

[0003] The present invention is aimed at the problem of high energy consumption in the drying process of the existing pyrolysis method, especially for sludge and household garbage that are difficult to handle and have a high water content, low treatment efficiency, imperfect technology, and easy to produce secondary pollution. Solid waste, a new solid waste treatment process supplemented by thermal conditioning and pyrolysis is proposed. The setting of thermal conditioning reactors in the process will basically not affect the calorific value of solid waste

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