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Supercritical boiler combusting ZhunDong coal of Xinjiang for realizing 660MW opposed combustion

A 660MW, supercritical boiler technology, applied in the boiler field, can solve the problems of boiler tube burst and shutdown, and achieve the effects of stable flame, low furnace heat load, and increased burnout height

Pending Publication Date: 2018-11-06
HARBIN BOILER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem that the existing boiler burns Xinjiang Zhundong coal, coking "bridge" occurs inside the boiler, which causes the boiler to explode and stop the furnace, which makes the boiler face a great safety problem, and provides a coal fired coal from Xinjiang Zhundong Coal 660MW counter-combustion supercritical boiler

Method used

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  • Supercritical boiler combusting ZhunDong coal of Xinjiang for realizing 660MW opposed combustion
  • Supercritical boiler combusting ZhunDong coal of Xinjiang for realizing 660MW opposed combustion

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specific Embodiment approach 1

[0020] Specific implementation mode 1: Combination figure 1 with figure 2 To illustrate this embodiment, this embodiment includes an economizer system 1, a water wall system 2, a superheater system 3, a reheater system 4, a starting system 5, a combustion system 6 and a flue gas system 7;

[0021] The combustion system 6 includes a plurality of main burners 6-1 and a plurality of SOFA burners 6-2;

[0022] A plurality of main burners 6-1 and a plurality of SOFA burners 6-2 are respectively arranged on both sides of the furnace and fixed on the water wall system 2, and the burners burn in the furnace to form an opposing flame;

[0023] Each main burner 6-1 includes central air pipe 6-1-1, coal feed pipe 6-1-2, secondary air pipe 6-1-3, tertiary air pipe 6-1-4, and secondary air cyclone Flow device 6-1-5, tertiary wind cyclone 6-1-6 and box body;

[0024] The central air pipe 6-1-1, the coal feed pipe 6-1-2, the secondary air pipe 6-1-3 and the tertiary air pipe 6-1-4 are set together...

specific Embodiment approach 2

[0028] Specific implementation manner two: combination figure 1 To describe this embodiment, the pipes of the economizer system 1 in this embodiment are smooth tubes or scale tubes arranged in series.

[0029] The other composition and connection relationship are the same as in the first embodiment.

specific Embodiment approach 3

[0030] Specific implementation mode three: combination figure 1 To illustrate this embodiment, the reheater system 4 of this embodiment includes a low temperature reheater 4-1 and a final stage reheater 4-2;

[0031] The low-temperature reheater 4-1 and the low-temperature superheater 3-2 are arranged side by side at the end of the furnace, and the final reheater 4-2 is arranged near the outlet of the furnace.

[0032] The other composition and connection relationship are the same as in the second embodiment.

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Abstract

The invention discloses a supercritical boiler combusting ZhunDong coal of Xinjiang for realizing 660MW opposed combustion, relates to a boiler, and aims at solving the problems that when ZhunDong coal of Xinjiang is combusted in an existing boiler, the boiler is shut down due to pipe explosion which is caused by coking 'bridging' in the boiler, so that the boiler faces great safety problem. The supercritical boiler disclosed by the invention comprises a coal economizer system, a water-cooling wall system, a superheater system, a reheater system, a start-up system, a combustion system, and a flue gas and air system, wherein the combustion system comprises a plurality of main combustors and a plurality of SOFA combustors; the plurality of main combustors and the plurality of SOFA combustorsare oppositely arranged at the two sides of a hearth separately and fixed to the water-cooling wall system, and the combustors are capable of forming opposed flame through combustion in the hearth; the superheater system comprises a ceiling enclosure wall superheater, a low-temperature superheater, a split-screen superheater, a finishing superheater and a header; and the start-up system is arranged on the flue gas and air system, the low-temperature superheater, the coal economizer system and the reheater system are arranged on the tail part of the hearth. The supercritical boiler disclosed by the invention is applicable to combustion for ZhunDong coal of Xinjiang.

Description

Technical field [0001] The invention relates to a boiler, in particular to a 660MW counter-combustion supercritical boiler using Xinjiang Zhundong coal. Background technique [0002] Zhundong coal belongs to the high-moisture coal with strong coking, serious contamination and serious corrosion in Zhundong area of ​​Xinjiang. 2 The content of alkali metals such as O and CaO is extremely high. The sulfuric acid composite salt formed by it is easy to volatilize under high temperature conditions and is in a molten state. When passing through the heated surface, it will condense on the heated surface tube to form a sintered or cohesive ash deposit. Most of the formed deposits occur in the convective heating surface area where the flue gas temperature is about 800 ℃, which causes alkali metal corrosion on the high temperature heating surface. At the same time, the compound formed by CaO has extremely strong fouling properties. The heating surface is prone to ash blocking, which will se...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F22B31/08F22B3/08F23C5/28F23C7/00
CPCF22B3/08F22B31/08F23C5/28F23C7/00F23C7/002
Inventor 龙志云胡双南商宇薇
Owner HARBIN BOILER
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