Carbon-containing solid waste treatment system and method

Abstract

The present invention provides a carbon-containing solid waste treatment system including a sludge pre storage drying unit, the sludge pre storage drying unit is connected with a sludge drying unit, the sludge drying unit is connected with a sludge pyrolysis unit and a fuel gas burning and heat recovery unit, and the sludge pyrolysis unit is connected with the fuel gas burning and heat recovery unit. An autothermal pyrolysis gasification system is used, gas and solid phases are separately processed, sludge is processed by mechanical dewatering, drying dewatering and pyrolysis and gasification three steps, and harmlessness, reduction, recycling and stabilization of the sludge can be realized. The heat in the system can be balanced by the heat brought by the sludge itself. When the quality of the sludge is poor and the calorific value is low, a coke pyrolysis reactor is added to realize the heat balance of the system. The system has no dioxin emission and dust emission problems, and completely realizes the clean and environmental-friendly treatment of carbon-containing solid waste such as the sludge. The application prospect is very broad.

Description

technical field [0001] The invention relates to a treatment system and method for carbon-containing solid waste such as sludge, and belongs to the technical field of solid waste treatment. Background technique [0002] In recent decades, with the acceleration of urbanization and the rapid development of social economy in our country, great progress has been made in the construction of urban drainage infrastructure, and the rate of urban sewage entering the network has continued to increase. The national urban sewage treatment plants produce about 1.3 million tons of dry sludge per year, and it is increasing at a rate of about 10% per year. If all urban sewage is treated, 8.4 million tons of dry sludge will be produced per year. Due to the large amount of toxic and harmful substances contained in the biological sludge of the sewage plant, it is easy to cause secondary pollution. Therefore, how to scientifically treat the sludge with huge output and complex components to mak...

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is: make full use of the calorific value of the solid waste itself for self-decomposition without secondary pollution; Under the premise of investment and operating costs, energy supplementation is carried out in the most environmentally friendly way to complete the clean and environmentally friendly conversion or utilization of solid waste, and completely solve the secondary pollution such as heavy metals and dioxins.

Images