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High-parameter waste heat boiler suitable for garbage incinerator grate

A technology of waste incinerator and waste heat boiler, which is applied in the field of high-parameter waste heat boiler and can solve the problems of reducing the power generation efficiency of the unit

Pending Publication Date: 2019-04-16
DONGFANG BOILER GROUP OF DONGFANG ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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

Method used

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  • High-parameter waste heat boiler suitable for garbage incinerator grate
  • High-parameter waste heat boiler suitable for garbage incinerator grate
  • High-parameter waste heat boiler suitable for garbage incinerator grate

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Embodiment Construction

[0023] All features disclosed in this specification, or steps in all methods or processes disclosed, may be combined in any manner, except for mutually exclusive features and / or steps.

[0024] Any feature disclosed in this specification, unless specifically stated, can be replaced by other alternative features that are equivalent or have similar purposes. That is, unless expressly stated otherwise, each feature is one example only of a series of equivalent or similar features.

[0025] At present, in order to alleviate the corrosion problem of high-temperature flue gas in existing waste incinerator grate furnace waste heat boilers at home and abroad, the steam parameters at the boiler outlet are basically controlled not to exceed 4MPa / 400°C. As the pressure and temperature decrease, the working efficiency of the steam turbine will decrease accordingly, and the economic benefits of the waste-to-energy plant will decrease accordingly.

[0026] In order to achieve the purpose o...

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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...

Claims

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Application Information

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IPC IPC(8): F22B1/18F22D1/00F22G3/00F23G5/48F23J11/00
CPCF22B1/18F22D1/00F22G3/00F23G5/48F23J11/00
Inventor 黄敏聂立苏虎巩李明薛大勇张文杰肖尧杨磊
Owner DONGFANG BOILER GROUP OF DONGFANG ELECTRIC CORP
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