Heavy metal-containing multi-source waste disposal system and method based on pulverized coal boiler

Abstract

The invention discloses a heavy metal-containing multi-source waste disposal system and method based on a pulverized coal boiler. The system involves a material storage system, a hot air system, an alkaline removal agent system, an integrated disposal system, a gas-solid separation system, a burner, the pulverized coal boiler, a melting system and a waste gas burner; an outlet of the material storage system is connected with a material inlet of the integrated disposal system, a high-temperature flue gas connector is arranged at the position, between a hearth outlet of the pulverized coal boiler and a coal economizer, of a flue, a medium-temperature flue gas connector is arranged at the position, at an outlet of the coal economizer of the pulverized coal boiler, of the flue, and the high-temperature flue gas connector and the medium-temperature flue gas connector are connected with a flue gas inlet of the integrated disposal system; and an outlet of the hot air system is connected with an air inlet of the integrated disposal system, and an outlet of the alkaline removal agent system is connected with a solution inlet of the integrated disposal system. The system and method can achieve treatment of multi-source waste and have the characteristics of being low in cost and high in utilization rate.

Description

technical field [0001] The invention belongs to the technical field of multi-source waste treatment, and relates to a multi-source waste treatment system and method based on a pulverized coal boiler containing heavy metals. Background technique [0002] With the acceleration of my country's urbanization process, the output of multi-source wastes has increased rapidly, the existing environmental protection facilities have insufficient disposal capacity, and the national awareness of environmental protection has gradually increased. local government problems. Pulverized coal boilers in coal-fired power plants have favorable conditions such as rich heat and electricity, high furnace combustion temperature and complete environmental protection facilities at the tail. As a new way of waste incineration disposal, they have attracted the attention of the country and the industry. However, the different dry and wet forms of waste from multiple sources cannot meet the special require...

AI Technical Summary

Problems solved by technology

However, the different dry and wet forms of waste from multiple sources cannot meet the special requirements of the suspension combustion of pulverized coal boilers, which restricts the development of waste disposal in the thermal power industry. In addition, the content of Cl in waste is relatively high, and a large amount of The HCl gas will cause serious corrosion to the water wall of the boiler and affect the operation safety of the original boiler system; some wastes contain high heavy metal content, and a large amount of mixed combustion will cause the heavy metal content in the coal dust produced by the boiler system to exceed the standard, affecting The comprehensive utilization of fly ash has even led to the fact that the fly ash produced by pulverized coal boilers mixed with waste has become a new solid waste

The above-mentioned factors and potential risks lead to a serious lag in the development of using pulverized coal boilers to dispose of multi-source wastes. In addition, the current situation of low utilization hours of thermal power units has led to low utilization rates of large-scale equipment in the country. New waste power plants or incinerators and other processes have caused Social investment funds and land waste

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