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Heating surface embedded system applicable to mixed burning of lignite in various proportions in supercritical boilers

A supercritical boiler and embedded system technology, applied in the field of heating surface systems, can solve the problems of poor fuel flexibility, reduce the difficulty of manufacturing and assembly, facilitate refined design, and protect people's livelihood

Active Publication Date: 2020-11-20
HARBIN BOILER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides a heating surface embedded system that can adapt to the blending of various proportions of lignite in supercritical boilers. The research and development of the invention solves the problem of poor fuel flexibility of existing thermal power boilers

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  • Heating surface embedded system applicable to mixed burning of lignite in various proportions in supercritical boilers

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specific Embodiment approach 1

[0023] Specific implementation mode one: combine figure 1 Describe this embodiment, a heating surface embedded system that can adapt to the mixed combustion of lignite in various proportions of supercritical boilers in this embodiment, including a horizontal low-temperature reheater 2, an embedded economizer 3, and a vertical low-temperature reheater 4. Low re-export header 5, last re-entry header 7, final reheater 8, last re-export header 9, low re-entry header 12 and economizer inlet header 13, economizer The inlet header 13 is connected to the inlet of the embedded economizer 3 through the economizer pipeline 11, and the outlet of the embedded economizer 3 is connected to the distribution header of the water wall;

[0024] The low re-inlet header 12 is connected to the inlet of the horizontal low-temperature reheater 2, the outlet of the horizontal low-temperature reheater 2 is connected to the inlet of the vertical low-temperature reheater 4, and the outlet of the vertical...

specific Embodiment approach 2

[0025] Specific implementation mode two: combination figure 1 This embodiment is described, which is a heating surface embedded system that can adapt to the mixed combustion of various proportions of lignite in a supercritical boiler. The embedded economizer 3 is embedded and installed in the horizontal low-temperature reheater 2 .

specific Embodiment approach 3

[0026] Specific implementation mode three: combination figure 1 Describe this embodiment, a heating surface embedded system that can adapt to the mixed combustion of lignite in various proportions of supercritical boilers in this embodiment, the inlet header 13 of the economizer is connected to the economizer 1, and the embedded economizer 3. Parallel connection with economizer 1 through economizer inlet header 13, economizer 1 is connected with hanging pipe inlet header 15, hanging pipe inlet header 15 is connected with hanging pipe outlet header 17 through hanging pipe 16 Connection, water enters the economizer inlet header 13 from the water supply pipe, and the water is divided into two paths in the economizer inlet header 13: one part enters the lower part of the economizer 1, enters the hanging pipe inlet header 15 after heating and It flows through the hanging pipe 16 and enters the outlet header 17 of the hanging pipe. The hanging pipe 16 is used for load-bearing and in...

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Abstract

The invention relates to a heating surface system applicable to mixed burning of lignite in various proportions in supercritical boilers, and belongs to the technical field of boilers. The problem ofpoor fuel flexibility of existing boilers is solved. The heating surface system includes a horizontal low-temperature reheater, an embedded economizer, a vertical low-temperature reheater, a low re-outlet header, a final re-inlet collecting header, a final-stage reheater, a final re-outlet collecting header, a low re-inlet header and an economizer inlet header; the economizer inlet header is connected to the embedded economizer through an economizer pipe; the embedded economizer is connected to a waterwall distribution header; the low re-inlet header is connected to the horizontal low-temperature reheater; the horizontal low-temperature reheater is connected to an inlet of the vertical low-temperature reheater; an outlet of the vertical low-temperature reheater is connected to an inlet ofthe low re-outlet header; the low re-outlet header is connected to the final re-inlet collecting header through a reheater connecting pipe; the final re-inlet collecting header is connected to an inlet of the final-stage reheater; and the final-stage reheater is connected to the final re-outlet collecting header. The ability of boilers adapting to various coal types is improved.

Description

technical field [0001] The invention relates to a heating surface system suitable for mixed burning of various ratios of lignite in a supercritical boiler, which belongs to the technical field of boilers. Background technique [0002] The reheater system of a typical supercritical boiler is divided into low-temperature reheater and high-temperature reheater. There is no header connection in the middle. The low-temperature reheater is arranged in the front flue of the tail double flue. The high-temperature reheater Arranged in the horizontal flue for counter-current and downstream mixing and flue gas heat exchange, the flue gas enters the economizer after coming out of the reheater, and then enters the SCR and preheater. [0003] At present, the design coal types of power plant boilers are limited to several types. Since the coal price directly affects the cost of power generation, the power plant will try to use lower-priced coal to reduce costs, which makes it complicated f...

Claims

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Application Information

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IPC IPC(8): F22B31/08F22D1/02F22G3/00
CPCF22B31/08F22D1/02F22G3/006F22G3/007
Inventor 黄莺王禹朋殷亚宁李冲郭馨方亮齐翼飞
Owner HARBIN BOILER
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