WO2023221609A1 - Four de chaudière doté de paroi refroidie à la vapeur, et système - Google Patents

Four de chaudière doté de paroi refroidie à la vapeur, et système Download PDF

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Publication number
WO2023221609A1
WO2023221609A1 PCT/CN2023/080468 CN2023080468W WO2023221609A1 WO 2023221609 A1 WO2023221609 A1 WO 2023221609A1 CN 2023080468 W CN2023080468 W CN 2023080468W WO 2023221609 A1 WO2023221609 A1 WO 2023221609A1
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WO
WIPO (PCT)
Prior art keywords
wall
steam
cooled
water
cooling
Prior art date
Application number
PCT/CN2023/080468
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English (en)
Chinese (zh)
Inventor
刘宇钢
龚超
莫春鸿
冉燊铭
尹朝强
黎懋亮
王婷
Original Assignee
东方电气集团东方锅炉股份有限公司
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Filing date
Publication date
Application filed by 东方电气集团东方锅炉股份有限公司 filed Critical 东方电气集团东方锅炉股份有限公司
Publication of WO2023221609A1 publication Critical patent/WO2023221609A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23M—CASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS IN COMBUSTION CHAMBERS; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTION APPARATUS; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR
    • F23M5/00—Casings; Linings; Walls
    • F23M5/08—Cooling thereof; Tube walls
    • F23M5/085—Cooling thereof; Tube walls using air or other gas as the cooling medium
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B3/00—Other methods of steam generation; Steam boilers not provided for in other groups of this subclass
    • F22B3/08—Other methods of steam generation; Steam boilers not provided for in other groups of this subclass at critical or supercritical pressure values
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B37/00—Component parts or details of steam boilers
    • F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
    • F22B37/26—Steam-separating arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22G—SUPERHEATING OF STEAM
    • F22G3/00—Steam superheaters characterised by constructional features; Details of component parts thereof

Definitions

  • the invention relates to the technical field of boilers, specifically a boiler furnace and system with a steam-cooled wall.
  • One of the measures to solve the problem of insufficient strength of 12Cr1MoVG material caused by the increase in wall temperature deviation is to upgrade the water-cooled wall material from 12Cr1MoVG to SA-213T91 material.
  • the SA-213T91 material has no application experience in membrane wall water-cooling walls, and the engineering application experience is slightly insufficient.
  • the working medium is still in a vapor-liquid two-phase flow in the middle mixing section of the furnace, which can easily cause uneven flow distribution in each circuit of the water-cooled wall in the upper part of the furnace, resulting in the water-cooled wall
  • the deviation is large and affects the safe operation of the boiler.
  • the present invention provides a boiler furnace and system with a steam-cooled wall, which solves the problems of the existing technology such as large deviation of the water-cooled wall and affecting the safe operation of the boiler.
  • a boiler furnace with a steam-cooled wall including a lower water-cooled wall connected in sequence from bottom to top, The upper water-cooled wall and steam-cooled wall.
  • the steam-cooled wall includes a steam-cooled wall front wall inlet header, a steam-cooled wall side wall inlet header, a steam-cooled wall rear wall inlet header, a steam-cooled wall front wall, a steam-cooled wall inlet header Side wall, steam cooling wall rear wall, steam cooling wall front wall outlet header, steam cooling wall side wall outlet header, steam cooling wall rear wall outlet header, steam cooling wall front wall and steam cooling wall front wall entrance collection respectively
  • the outlet header of the front wall of the steam cooling wall is connected to the outlet header of the steam cooling wall.
  • the side wall of the steam cooling wall is connected to the entrance header of the side wall of the steam cooling wall and the outlet header of the side wall of the steam cooling wall.
  • the rear wall of the steam cooling wall is connected to the rear wall of the steam cooling wall.
  • the entrance header and the outlet header on the rear wall of the steam cooling wall are connected.
  • the lower water-cooled wall includes a lower water-cooled wall front wall inlet header, a lower water-cooled wall side wall inlet header, a lower water-cooled wall rear wall inlet header, a lower water-cooled wall front wall, a lower water-cooled wall inlet header
  • the side wall, the rear wall of the lower water-cooling wall, the outlet header of the front wall of the lower water-cooling wall, the outlet header of the side wall of the lower water-cooling wall, the outlet header of the rear wall of the lower water-cooling wall, and the front wall of the lower water-cooling wall are respectively collected with the entrance of the front wall of the lower water-cooling wall.
  • the box and the lower water-cooling wall front wall outlet header are connected, the lower water-cooling wall side wall is connected to the lower water-cooling wall side wall inlet header and the lower water-cooling wall side wall outlet header respectively, and the lower water-cooling wall rear wall is respectively connected to the lower water-cooling wall rear wall.
  • the inlet header and the outlet header on the rear wall of the lower water-cooling wall are connected.
  • the upper water-cooled wall includes an upper water-cooled wall front wall inlet header, an upper water-cooled wall side wall inlet header, an upper water-cooled wall rear wall inlet header, an upper water-cooled wall front wall, an upper water-cooled wall inlet header Side wall, upper water-cooling wall rear wall, upper water-cooling wall front wall outlet header, upper water-cooling wall side wall outlet header, upper water-cooling wall rear wall outlet header, upper water-cooling wall outlet connecting pipe, water-cooling wall outlet mixing header,
  • the front wall of the upper water-cooling wall is connected to the entrance header of the front wall of the upper water-cooling wall and the outlet header of the front wall of the upper water-cooling wall.
  • the side walls of the upper water-cooling wall are respectively connected to the entrance header of the side wall of the upper water-cooling wall and the outlet header of the side wall of the upper water-cooling wall.
  • the rear wall of the upper water-cooling wall is connected to the inlet header of the rear wall of the upper water-cooling wall and the outlet header of the rear wall of the upper water-cooling wall.
  • the lower water-cooled wall, the upper water-cooled wall, and the steam-cooled wall are all membrane walls.
  • the lower water-cooling wall adopts spiral pipe coil or vertical pipe coil
  • the upper water-cooling wall adopts spiral pipe coil or vertical pipe coil
  • the internal water-cooling wall adopts spiral pipe coil or vertical pipe coil.
  • a boiler system with a steam-cooled wall including the boiler furnace with a steam-cooled wall, a steam-water separator connected to an upper water-cooled wall and a steam-cooled wall, and a ceiling connected to the steam-cooled wall. superheater.
  • it also includes an economizer connected to the lower water-cooled wall, a water-cooled wall intermediate mixing header connected to the lower water-cooled wall and the upper water-cooled wall respectively, and a wall-wrapped superheater connected to the ceiling superheater.
  • the steam-water separator is connected with a water-cooled wall mixing header to a steam-water separator connecting pipe and a steam-water separator outlet steam connecting pipe.
  • the present invention has the following beneficial effects:
  • the present invention changes the inherent thinking and practice of using only water-cooled walls in the furnace, and innovatively proposes to change the upper part of the furnace area to a steam-cooled wall;
  • the present invention replaces the working fluid of the furnace diaphragm wall in the upper part of the boiler with steam to reduce the heat absorption and outlet working fluid temperature of the upper furnace of the water-cooled wall, improve the safety of the water-cooled wall, and solve the problem of water-cooled wall when the boiler parameters are higher. Safety issues and material upgrade issues;
  • the present invention greatly reduces the working fluid deviation at the outlet of the upper water-cooled wall, eliminates the problem of large deviation of the low-load water-cooled wall in the water-cooled wall, and adapts to the flexible operation of the boiler.
  • Figure 1 is a schematic diagram of the structure of a conventional water-cooled fireplace
  • Figure 2 is a schematic structural diagram of a furnace with a steam-cooled wall according to the present invention.
  • Figure 3 is a system flow chart of the present invention
  • FIG 4 shows the W-flame boiler furnace with steam-cooled wall (mode 1);
  • FIG 5 shows the W flame boiler furnace with steam cooling wall (mode 2);
  • Figure 6 shows a conventional pulverized coal boiler furnace with steam-cooled walls (mode 1);
  • Figure 7 shows a conventional pulverized coal boiler furnace with steam-cooled walls (mode 2);
  • Figure 8 is a basic dimensional view of the boiler furnace in Embodiment 2.
  • Lower water-cooling wall rear wall outlet header 411, front wall entrance header of the upper water-cooling wall; 412, upper water-cooling wall side wall entrance header; 413, upper water-cooling wall rear wall entrance header; 414, upper water-cooling wall front wall; 415, upper water-cooling wall side wall; 416.
  • a boiler furnace with a steam-cooled wall includes a lower water-cooled wall 2, an upper water-cooled wall 4, and a steam-cooled wall 6 connected in sequence from bottom to top.
  • the steam-cooled wall 6 includes a steam-cooled wall front wall inlet header 611, a steam-cooled wall side wall inlet header 612, a steam-cooled wall rear wall inlet header 613, a steam-cooled wall front wall inlet header 611 614.
  • Steam Cold wall side wall 615, steam cooling wall rear wall 616, steam cooling wall front wall outlet header 617, steam cooling wall side wall outlet header 618, steam cooling wall rear wall outlet header 619, steam cooling wall front wall 614 respectively It is connected to the entrance header 611 of the front wall of the steam cooling wall and the outlet header 617 of the front wall of the steam cooling wall.
  • the side wall 615 of the steam cooling wall is connected to the entrance header 612 of the side wall of the steam cooling wall and the outlet header 618 of the side wall of the steam cooling wall respectively.
  • the steam-cooling wall rear wall 616 is connected to the steam-cooling wall rear wall inlet header 613 and the steam-cooling wall rear wall outlet header 619 respectively.
  • the lower water-cooled wall 2 includes a lower water-cooled wall front wall inlet header 211, a lower water-cooled wall side wall inlet header 212, a lower water-cooled wall rear wall inlet header 213, and a lower water-cooled wall front wall inlet header 212.
  • 214 Lower water-cooling wall side wall 215.
  • Lower water-cooling wall rear wall 216 Lower water-cooling wall front wall outlet header 217.
  • the wall 214 is respectively connected to the lower water-cooling wall front wall inlet header 211 and the lower water-cooling wall front wall outlet header 217.
  • the lower water-cooling wall side wall 215 is respectively connected to the lower water-cooling wall side wall inlet header 212 and the lower water-cooling wall side wall outlet header.
  • the lower water-cooling wall rear wall 216 is connected to the lower water-cooling wall rear wall inlet header 213 and the lower water-cooling wall rear wall outlet header 219 respectively.
  • the upper water-cooled wall 4 includes an upper water-cooled wall front wall inlet header 411, an upper water-cooled wall side wall inlet header 412, an upper water-cooled wall rear wall inlet header 413, an upper water-cooled wall front wall inlet header 411 414.
  • Upper water-cooling wall side wall 415 Upper water-cooling wall rear wall 416.
  • Upper water-cooling wall front wall outlet header 417 Upper water-cooling wall side wall outlet header 418.
  • Upper water-cooling wall rear wall outlet header 419 Upper water-cooling wall outlet.
  • the connecting pipe 4110, the water-cooling wall outlet mixing header 4111, the upper water-cooling wall front wall 414 are respectively connected to the upper water-cooling wall front wall inlet header 411, the upper water-cooling wall front wall outlet header 417, and the upper water-cooling wall side walls 415 are respectively connected to the upper water-cooling wall front wall inlet header 411 and the upper water-cooling wall front wall outlet header 417.
  • the water-cooling wall side wall inlet header 412 and the upper water-cooling wall side wall outlet header 418 are connected, and the upper water-cooling wall rear wall 416 is connected to the upper water-cooling wall rear wall inlet header 413 and the upper water-cooling wall rear wall outlet header 419 respectively.
  • the lower water-cooled wall 2, the upper water-cooled wall 4, and the steam-cooled wall 6 are all membrane walls.
  • the lower water-cooling wall 2 adopts spiral pipe coils or vertical pipe coils.
  • the upper water-cooling wall 4 adopts spiral pipe coil or vertical pipe coil.
  • a boiler system with a steam-cooled wall also includes a steam-water separator 5 connected to the upper water-cooled wall 4 and the steam-cooled wall 6, and a ceiling superheater 7 connected to the steam-cooled wall 6.
  • it also includes an economizer 1 connected to the lower water-cooled wall 2, a water-cooled wall intermediate mixing header 3 connected to the lower water-cooled wall 2 and the upper water-cooled wall 4 respectively, and a package wall connected to the ceiling superheater 7.
  • the steam-water separator 5 is connected with a water-cooled wall mixing header to a steam-water separator connecting pipe 511 and a steam-water separator outlet steam connecting pipe 512.
  • the present invention proposes a boiler furnace and system with a steam-cooled wall. It changes the inherent thinking and practice of using only water-cooled walls in the furnace (Fig. 1), and innovatively proposes to change the upper part of the furnace area to a steam-cooled wall (Fig. 2). .
  • a steam-cooled wall Fig. 2
  • the heat absorption and outlet working fluid temperature of the upper part of the water-cooled wall can be reduced, the safety of the water-cooled wall can be improved, and the safety issues of the water-cooled wall and the material upgrade when the boiler parameters are higher can be solved. It greatly reduces the working fluid deviation at the outlet of the upper water-cooled wall, eliminates the problem of large deviation of the low-load water-cooled wall in the water-cooled wall, and adapts to the flexible operation of the boiler.
  • the present invention proposes a boiler furnace and system with a steam-cooled wall.
  • the heat absorption of the water-cooled furnace is reduced, the water-cooled wall temperature deviation and the outlet working fluid temperature are reduced, and the water-cooled wall is improved. safety.
  • the present invention can solve the following problems:
  • this embodiment also includes The following technical characteristics:
  • a boiler furnace and system with a steam-cooled wall including: an economizer, a lower water-cooled wall, a water-cooled wall intermediate mixing header, an upper water-cooled wall, a steam-water separator, a steam-cooled wall, a ceiling superheater, and a wall-clad superheater .
  • the boiler can be a W-type flame boiler or a conventional pulverized coal boiler (including opposed combustion boiler and four-corner tangential combustion boiler).
  • the boiler feed water After passing through the economizer, the boiler feed water enters the lower water-cooled wall, the middle mixing header of the water-cooled wall, and the upper water-cooled wall, and then enters the steam-water separator.
  • the saturated steam drawn from the steam-water separator sequentially enters the steam-cooled wall, ceiling superheater, and The wall superheater is wrapped, and finally the next stage superheater is entered.
  • the boiler furnace is composed of a lower water-cooled wall, an upper water-cooled wall, and a steam-cooled wall from bottom to top.
  • the lower water-cooling wall consists of the lower water-cooling wall front wall entrance header, the lower water-cooling wall side wall entrance header, the lower water-cooling wall rear wall entrance header, the lower water-cooling wall front wall, the lower water-cooling wall side wall, the lower water-cooling wall rear wall, and the lower It consists of an outlet header on the front wall of the water-cooling wall, an outlet header on the side wall of the lower water-cooling wall, and an outlet header on the rear wall of the lower water-cooling wall.
  • the lower water wall can be a spiral tube coil or a vertical tube.
  • the upper water-cooling wall consists of the entrance header of the front wall of the upper water-cooling wall, the entrance header of the side wall of the upper water-cooling wall, the entrance header of the rear wall of the upper water-cooling wall, the front wall of the upper water-cooling wall, the side walls of the upper water-cooling wall, the rear wall of the upper water-cooling wall, and the upper It consists of a water-cooling wall front wall outlet header, an upper water-cooling wall side wall outlet header, an upper water-cooling wall rear wall outlet header, an upper water-cooling wall outlet connecting pipe, and a water-cooling wall outlet mixing header.
  • the upper water-cooling wall can be a spiral tube coil or a vertical tube.
  • a mixing header is installed between the lower water-cooling wall and the upper water-cooling wall.
  • the working fluid in the lower water-cooling wall is led from the outlet header of the lower water-cooling wall to the mixing header, and then from the mixing header to the inlet header of the upper water-cooling wall.
  • the steam cooling wall consists of the steam cooling wall front wall entrance header, the steam cooling wall side wall entrance header, the steam cooling wall rear wall entrance header, the steam cooling wall front wall, the steam cooling wall side wall, the steam cooling wall rear wall, the steam cooling wall It consists of the outlet header of the front wall of the cold wall, the outlet header of the side wall of the steam-cooled wall, and the outlet header of the rear wall of the steam-cooling wall.
  • the working fluid at the outlet of the upper water-cooled wall is introduced into the steam-water separator through the water-cooled wall mixing header to the connecting pipe of the steam-water separator, and the working fluid at the outlet of the separator is introduced into the steam-cooled wall through the outlet steam connecting pipe.
  • the water separated by the steam-water separator enters the boiler start-up system.
  • the bottom of the boiler horizontal flue can be a water-cooled wall or a steam-cooled wall superheater. If it is a water-cooled wall, it is the rear wall of the upper water-cooled wall (see Figures 4 and 6); if it is a steam-cooled wall superheater, it is the bottom wall of the horizontal flue (see Figures 5 and 7).
  • Plan 1 is a traditional plan: the boiler furnace has a total height of 75m, all of which are water-cooled furnaces.
  • the water-cooled wall is divided into upper and lower parts.
  • the lower part is a spiral tube ring with a height of ⁇ 53m
  • the upper part is a vertical tube ring with a height of ⁇ 22m.
  • the boiler furnace has a total height of 75m, and from bottom to top is a lower spiral water-cooled wall, an upper vertical water-cooled wall, and a steam-cooled wall.
  • the height of the steam cooling wall is ⁇ 15m.
  • the basic dimensions of the boiler furnace implemented according to the present invention are as follows:

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)

Abstract

La présente invention se rapporte au domaine technique des chaudières. Un four de chaudière doté d'une paroi refroidie à la vapeur, et un système, sont divulgués. Le four de chaudière comprend une paroi inférieure refroidie à l'eau, une paroi supérieure refroidie à l'eau et une paroi refroidie à la vapeur, lesquelles sont reliées successivement de bas en haut. La présente invention résout les problèmes de l'état de la technique concernant un grand écart de la paroi refroidie à l'eau, affectant le fonctionnement en sécurité d'une chaudière et similaires.
PCT/CN2023/080468 2022-05-16 2023-03-09 Four de chaudière doté de paroi refroidie à la vapeur, et système WO2023221609A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202210528118.6 2022-05-16
CN202210528118.6A CN114935158B (zh) 2022-05-16 2022-05-16 一种带有汽冷壁的锅炉炉膛及系统

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WO2023221609A1 true WO2023221609A1 (fr) 2023-11-23

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CN114935158B (zh) * 2022-05-16 2023-05-26 东方电气集团东方锅炉股份有限公司 一种带有汽冷壁的锅炉炉膛及系统

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