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660MW tangential firing ultra-supercritical boiler burning Xinjiang Zhundong coal

An ultra-supercritical boiler and tangential combustion technology, which is applied in steam boilers, steam superheating, steam generation, etc., can solve problems such as tube burst and shutdown, and achieve low furnace heat load, reduced coking tendency, and reduced heat load Effect

Pending Publication Date: 2018-10-23
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 integral parts are prone to pipe explosion and shutdown, the present invention further proposes a 660MW tangentially fired ultra-supercritical boiler fueled with Xinjiang Zhundong coal.

Method used

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  • 660MW tangential firing ultra-supercritical boiler burning Xinjiang Zhundong coal

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specific Embodiment approach 1

[0011] Specific implementation mode one: combine figure 1 To illustrate this embodiment, a 660MW tangentially fired ultra-supercritical boiler using Xinjiang Zhundong coal described in this embodiment includes an economizer 1, a water wall 2, a superheater system 3, a reheater system 4, and a start-up system 5 The flue gas system 7, the starting system 5 are installed on the top of the furnace 8, the economizer 1, the superheater system 3, the reheater system 4, and the combustion system 6 are installed on the upper part of the furnace 8, and the combustion system 6 is installed on the top of the furnace 8 In the middle part, the water-cooled wall 2 is installed on the inner wall of the furnace 8, the flue gas system 7 is installed at the lower part of the furnace 8, the combustion system 6 is arranged at the corner of the furnace 8 surrounded by the water-cooled wall system 2, and the flame forms four corners in the furnace 8 Cut round and burn. The flue gas ratio in the fro...

specific Embodiment approach 2

[0016] Specific implementation mode two: combination figure 1 To illustrate this embodiment, a superheating system 3 of a 660MW tangentially fired ultra-supercritical boiler using Xinjiang Zhundong coal described in this embodiment includes a primary superheater 3-1, a secondary superheater 3-2 and a tertiary superheater 3-3, the first-stage superheater 3-1 is installed in the rear shaft of the tail flue of the furnace 8, the second-stage superheater 3-2 is installed on the top of the furnace 8, and the third-stage superheater 3-3 is installed at the outlet of the furnace 8 in the horizontal convection flue. The superheater system 3 also includes a ceiling-wrapped superheater, a low-temperature superheater, a partition superheater, a final stage superheater, and related connecting pipes and headers. Other components and connections are the same as those in the first embodiment.

specific Embodiment approach 3

[0017] Specific implementation mode three: combination figure 1 To illustrate this embodiment, a reheater system 4 for a 660MW tangentially fired ultra-supercritical boiler using Xinjiang Zhundong coal in this embodiment includes a first-stage reheater 4-1 and a second-stage reheater 4-2 The primary reheater 4-1 is installed in the front shaft of the flue at the tail of the furnace 8, and the secondary reheater 4-2 is installed in the horizontal convection flue at the outlet of the furnace 8. The reheater system 4 also includes a low temperature reheater, a final reheater and associated connecting piping and headers. Other components and connections are the same as those in the first embodiment.

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Abstract

The invention relates to ultra-supercritical boilers, in particular to a 660MW tangential firing ultra-supercritical boiler burning Xinjiang Zhundong coal, and belongs to the field of boiler equipment. The problem that the phenomena of tube burst and blowing out can occur to whole parts of an existing boiler is solved. The 660MW tangential firing ultra-supercritical boiler comprises an economizer,a water cooling wall, a superheater system, a reheater system, a starting system and a flue gas and air system. The starting system is mounted at the top of a hearth; the economizer, the superheatersystem, the reheater system and a combustion system are mounted on the upper portion of the hearth; the combustion system is mounted in the middle of the hearth; the water cooling wall is mounted on the inner wall of the hearth; the smoke gas and air system is mounted on the lower portion of the hearth; the combustion system is distributed at the corner, defined by a water cooling wall system, ofthe hearth; and flames form corner tangential firing in the hearth.

Description

technical field [0001] The invention relates to an ultra-supercritical boiler, in particular to a 660MW tangentially fired ultra-supercritical boiler using Xinjiang Zhundong coal, which belongs to the field of boiler equipment. Background technique [0002] The Zhundong coal belongs to the high-moisture coal with strong coking, serious contamination and severe corrosion in the Zhundong area of ​​Xinjiang. 2 The content of alkali metals such as O and CaO is extremely high, and the sulfuric acid compound salt formed by it is easy to volatilize under high temperature conditions and is in a molten state. When passing through the heating surface, it will condense on the heating surface tube to form sintered or cohesive ash deposits. Most of the formed deposits occur in the area of ​​the convective heating surface where the flue gas temperature is about 800°C, causing corrosion of alkali metals on the high temperature heating surface. The heating surface is prone to ash clogging,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F22B3/08F22B31/00F22B31/08F22G7/12
CPCF22B3/08F22B31/00F22B31/08F22G7/12
Inventor 龙志云胡双南王永杰孙洪民
Owner HARBIN BOILER
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