Supercritical carbon dioxide secondary reheat coal-fired power generation boiler system

Abstract

The invention relates to a supercritical carbon dioxide secondary reheat coal-fired power generation boiler system comprises a furnace and a flue, wherein the furnace is vertically arranged; the side wall of the furnace is formed by a cooling wall and a reheat wall; the cooling wall is positioned below the reheat wall; a burner is arranged in each of the middle part area and the lower part area of the cooling wall; the reheat wall comprises a primary reheat wall and a secondary reheat wall; the ground clearances of the primary reheat wall and the secondary reheat wall are equal or approximate; an overheater module and a reheater module are arranged in the flue in the flue gas flowing direction in a staged manner. The supercritical carbon dioxide secondary reheat coal-fired power generation boiler system has the benefits as follows: the reheat wall is novel in structural design, three-stage heat absorption and energy conversion are realized on the premise that the height of the furnace is not increased, and the furnace does not need to be designed as horizontal, and the energy utilization ratio is high; besides, by opening and closing appropriate valves, the specific combination manner of the primary reheat wall and the secondary reheat wall can be selected, that is, the heating surface area of the primary reheat wall and the secondary reheat wall can be adjusted, the temperature of the reheat working medium can be flexibly adjusted, and that the superheat degree of the reheat working medium reaches the standard can be ensured.

Description

technical field

[0001] The invention belongs to the field of advanced power generation equipment, and in particular relates to a supercritical carbon dioxide secondary reheating coal-fired power generation boiler system. Background technique

[0002] Since improving the efficiency of generator sets and reducing pollutant emissions is an eternal topic, some new concept power systems have been paid attention to. The physical properties of supercritical carbon dioxide are special. Under the same load requirements, the power generation system using it as a working medium is smaller in size and more compact in structure, which can save floor space and reduce cost. In the case of the existing high temperature resistance level of steel, the efficiency of the boiler system using supercritical carbon dioxide as the working medium is higher.

[0003] In the context of carbon dioxide emission reduction, with the in-depth research on carbon dioxide capture and utilization, it will help...

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