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

A secondary reheat, carbon dioxide technology, applied in indirect carbon dioxide emission reduction, steam boilers, steam superheating and other directions, can solve the problem of substandard superheat, and achieve the effect of superheat reaching the standard, high heat transfer efficiency, and novel structure design.

Pending Publication Date: 2017-07-25
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies in the prior art, the present invention provides a supercritical carbon dioxide secondary reheating coal-fired power boiler system, which can flexibly adjust the heating degree of the primary reheating working medium and the secondary reheating working medium to effectively Solve the problem that its superheat is not up to standard

Method used

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

Examples

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Effect test

Embodiment 1

[0033] like figure 2 As shown, under specific load requirements, the front wall, rear wall and corresponding independent headers are primary reheating walls 3-1, and the left and right walls and corresponding independent headers are secondary reheating walls 3-2 .

[0034] The opening and closing of the valve and the specific connection relationship are as follows: the valve on the connecting pipeline between the outlet of the primary high-temperature reheater 6 and the independent headers at the respective lower ends of the front wall and the rear wall is opened, and the outlet of the secondary high-temperature reheater 7 is connected to the The valves on the connecting pipes between the respective lower end independent headers of the left wall and the right wall are opened, and the valves on the connecting pipes between the respective upper end independent headers of the front wall and the rear wall and the inlet of the high-pressure cylinder 15 of the gas turbine are opene...

Embodiment 2

[0036] Under another specific load requirement, the front wall, left wall and corresponding independent headers are primary reheating walls 3-1, and the rear wall, right wall and corresponding independent headers are secondary reheating walls 3-2.

[0037] The opening and closing of the valve and the specific communication relationship are as follows: the valve on the connecting pipeline between the outlet of the primary high-temperature reheater 6 and the independent headers at the respective lower ends of the front wall and the left wall is opened, and the outlet of the secondary high-temperature reheater 7 is connected to the The valves on the connecting pipes between the respective lower end independent headers of the rear wall and the right wall are opened, and the valves on the connecting pipes between the respective upper end independent headers of the front wall and the left wall and the inlet of the high-pressure cylinder 15 of the gas turbine are opened. Open, the val...

Embodiment 3

[0039] Under another specific load requirement, the front wall, rear wall, left wall and corresponding independent headers are primary reheating walls 3-1, and the right wall and corresponding independent headers are secondary reheating walls 3-2.

[0040] The opening and closing of the valves and the specific connection relationship are as follows: the valves on the connecting pipes between the 6 outlets of the primary high-temperature reheater and the independent headers at the lower ends of the front wall, the rear wall and the left wall are opened, and the valves on the connecting pipes of the secondary high-temperature reheater 7. The valve on the connecting pipe between the outlet and the independent header at the lower end of the right wall is opened, and the valve on the connecting pipe between the independent upper end of the front wall, the rear wall and the left wall and the inlet of the high-pressure cylinder 15 of the gas turbine is opened. The valve of the upper e...

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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...

Claims

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Application Information

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IPC IPC(8): F22B31/08F22G1/02F23L15/00
CPCF22B31/08F22G1/02F23L15/00Y02E20/34
Inventor 向军张晨浩周敬胡松苏胜汪一江龙徐俊许凯肖一鸣廖广
Owner HUAZHONG UNIV OF SCI & TECH
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