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A heating surface embedded system that can adapt to the blending of various proportions of lignite 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, ensure people's livelihood, and save production and assembly costs

Active Publication Date: 2022-02-08
HARBIN BOILER CO LTD
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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

Method used

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  • A heating surface embedded system that can adapt to the blending of various proportions of lignite 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 suitable for mixed burning of various ratios of lignite in a supercritical boiler, which belongs to the technical field of boilers. Solve the problem of poor fuel flexibility of existing boilers. Including horizontal low-temperature reheater, embedded economizer, vertical low-temperature reheater, low re-export header, final re-entry collection header, final stage reheater, final re-export collection header, low re-entry collection The inlet header of the economizer is connected to the embedded economizer through the economizer pipe, and the embedded economizer is connected to the distribution header of the water wall; the low re-inlet header is connected to the horizontal low-temperature re- Heater connection, the horizontal low-temperature reheater is connected to the inlet of the vertical low-temperature reheater, the outlet of the vertical low-temperature reheater is connected to the inlet of the low re-exit header, and the low-re-exit header is connected to the final re-entry through the reheater connecting pipe The collection header is connected, the final re-entry collection header is connected with the inlet of the final reheater, and the final reheater is connected with the final re-exit collection header. Improve the boiler's ability to adapt to changing coal types.

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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Patent Type & Authority Patents(China)
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 CO LTD
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