High-parameter waste heat boiler suitable for garbage incinerator grate

Abstract

The invention discloses a high-parameter waste heat boiler suitable for a garbage incinerator grate. The high-parameter waste heat boiler suitable for the garbage incinerator grate comprises a water cooling flue, a tail flue and a horizontal flue or a connecting flue located between the water cooling flue and the tail flue, and a heating surface of a high-temperature superheater is arranged in thewater cooling flue, so that the temperature of a superheated steam outlet of the high-parameter waste heat boiler reaches 450-540 DEG C and the pressure reaches above 6.4MPa. According to the high-parameter waste heat boiler suitable for the garbage incinerator grate, by reasonably designing the arrangement positions of the heating surfaces of the boiler high-temperature stage superheater and reheater, effective anti-corrosion measurements are adopted in the surfaces of the heating surfaces, high-temperature corrosion of the heating surfaces is effectively prevented and the steam parameter ofthe boiler is improved, and the steam parameter of the waste heat boiler can be improved to high-temperature and high-pressure and ultrahigh pressure parameter is even further improved to efficient ultrahigh pressure. Further, a reheater system is arranged in the boiler to heat steam which is from a turbine high-pressure cylinder and has relatively low outlet temperature to 540 DEG C again, and higher power generation efficiency is obtained.

Description

technical field [0001] The invention relates to the technical field of environmental protection equipment for waste incineration, and more specifically, relates to a high-parameter waste heat boiler suitable for waste incineration grate furnaces. Background technique [0002] With the development of economy and social life, the number and scale of cities are increasing, accompanied by the rapid increase in the output of municipal solid waste, and the composition of waste has also undergone major changes. Traditional composting and sanitary landfill Due to the existence of problems such as large area occupied and leachate treatment, the method can no longer meet the current requirements for the harmless treatment of domestic waste. However, waste incineration has the advantages of high treatment efficiency, small occupied area and high degree of reduction. The utilization of heat energy generated by incineration, the advantages of back-end resource utilization of ash and slag...

AI Technical Summary

Problems solved by technology

All superheaters adopt convective heat exchange, and the temperature of the main steam at the boiler outlet is about 400°C, which reduces the risk of high-temperature corrosion of the superheater. Such an arrangement can effectively improve the stability and safety of boiler operation, but the steam parameters at the boiler outlet, especially The steam temperature is at least 50°C lower than that of generator sets of the same pressure level (domestic conventional units are 450-485°C), which reduces the power generation efficiency of the unit by at least 1 percentage point

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