WO2023221609A1 - Boiler furnace with steam-cooled wall, and system - Google Patents
Boiler furnace with steam-cooled wall, and system Download PDFInfo
- 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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- WIPO (PCT)
- Prior art keywords
- wall
- steam
- cooled
- water
- cooling
- Prior art date
Links
- 238000001816 cooling Methods 0.000 claims description 198
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 34
- 239000012528 membrane Substances 0.000 claims description 4
- 239000012530 fluid Substances 0.000 description 13
- 239000003245 coal Substances 0.000 description 11
- 239000000463 material Substances 0.000 description 7
- 238000002485 combustion reaction Methods 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 240000004282 Grewia occidentalis Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 230000005514 two-phase flow Effects 0.000 description 1
Classifications
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- 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
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- 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
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- 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
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- 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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Abstract
The present invention relates to the technical field of boilers. Disclosed are a boiler furnace with a steam-cooled wall, and a system. The boiler furnace comprises a lower water-cooled wall, an upper water-cooled wall, and a steam-cooled wall that are sequentially connected from bottom to top. The present invention solves the problems in the prior art of large water-cooled wall deviation, affecting the safe operation of a boiler and the like.
Description
本发明涉及锅炉技术领域，具体是一种带有汽冷壁的锅炉炉膛及系统。The invention relates to the technical field of boilers, specifically a boiler furnace and system with a steam-cooled wall.
我国煤电技术经过近20年的快速发展，已从亚临界技术发展至高效超超临界技术。煤电机组改造升级中，对新建煤电机组的供电煤耗提出了更高要求，未来新建的煤电机组的蒸汽参数将进一步提升，以降低机组供电煤耗，并对灵活性运行提出更高要求，以及时消纳新能源。After nearly 20 years of rapid development, my country's coal power technology has developed from subcritical technology to high-efficiency ultra-supercritical technology. During the transformation and upgrading of coal power units, higher requirements are put forward for the coal consumption of power supply of newly built coal power units. In the future, the steam parameters of newly built coal power units will be further improved to reduce the coal consumption of power supply of the units and put forward higher requirements for flexible operation. To absorb new energy in a timely manner.
对于更高参数煤电机组，其锅炉给水温度及压力进一步提高，锅炉水冷壁壁温进一步提高，水动力安全将是面临的主要问题之一。现有高效超超临界锅炉水冷壁通常采用12Cr1MoVG，其壁温余量已较小，当参数进一步提升时，由于壁温偏差的影响，12Cr1MoVG材质的水冷壁强度或不足，需要采取措施保证水冷壁安全，尤其是将来煤电机组在深度调峰时，水冷壁壁温偏差仍将增加。解决壁温偏差增加导致的12Cr1MoVG材质强度不足问题的措施之一就是将水冷壁材质从12Cr1MoVG升级为SA-213T91材质。但SA-213T91材质没有用于膜式壁水冷壁的应用经验，工程应用经验稍显不足。For coal-fired power units with higher parameters, the boiler feed water temperature and pressure will further increase, and the boiler water-cooled wall temperature will further increase. Hydrodynamic safety will be one of the main issues faced. The water wall of existing high-efficiency ultra-supercritical boilers usually uses 12Cr1MoVG, and its wall temperature margin is already small. When the parameters are further improved, due to the influence of wall temperature deviation, the strength of the water wall made of 12Cr1MoVG may be insufficient. Measures need to be taken to ensure that the water wall Safety, especially when coal power units undergo deep peak load regulation in the future, the temperature deviation of the water-cooled wall will still increase. 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. However, the SA-213T91 material has no application experience in membrane wall water-cooling walls, and the engineering application experience is slightly insufficient.
对于锅炉灵活性运行，由于锅炉中低负荷下处于亚临界运行，工质在炉膛中间混合段还处于汽液两相流，易造成炉膛上部的水冷壁各回路的流量分配不均，导致水冷壁偏差大，影响锅炉安全运行。For the flexible operation of the boiler, since the boiler is in subcritical operation under medium and low loads, 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.
发明内容Contents of the invention
为克服现有技术的不足，本发明提供了一种带有汽冷壁的锅炉炉膛及系统，解决现有技术存在的水冷壁偏差大、影响锅炉安全运行等问题。In order to overcome the shortcomings of the existing technology, 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.
本发明解决上述问题所采用的技术方案是：The technical solution adopted by the present invention to solve the above problems is:
一种带有汽冷壁的锅炉炉膛，包括从下至上依次连接的下部水冷壁、
上部水冷壁、汽冷壁。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.
作为一种优选的技术方案，所述汽冷壁包括汽冷壁前墙入口集箱、汽冷壁侧墙入口集箱、汽冷壁后墙入口集箱、汽冷壁前墙、汽冷壁侧墙、汽冷壁后墙、汽冷壁前墙出口集箱、汽冷壁侧墙出口集箱、汽冷壁后墙出口集箱,汽冷壁前墙分别与汽冷壁前墙入口集箱、汽冷壁前墙出口集箱相连,汽冷壁侧墙分别与汽冷壁侧墙入口集箱、汽冷壁侧墙出口集箱相连；汽冷壁后墙分别与汽冷壁后墙入口集箱、汽冷壁后墙出口集箱相连。As a preferred technical solution, 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.
作为一种优选的技术方案，所述下部水冷壁包括下部水冷壁前墙入口集箱、下部水冷壁侧墙入口集箱、下部水冷壁后墙入口集箱、下部水冷壁前墙、下部水冷壁侧墙、下部水冷壁后墙、下部水冷壁前墙出口集箱、下部水冷壁侧墙出口集箱、下部水冷壁后墙出口集箱，下部水冷壁前墙分别与下部水冷壁前墙入口集箱、下部水冷壁前墙出口集箱相连，下部水冷壁侧墙分别与下部水冷壁侧墙入口集箱、下部水冷壁侧墙出口集箱相连，下部水冷壁后墙分别与下部水冷壁后墙入口集箱、下部水冷壁后墙出口集箱相连。As a preferred technical solution, 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.
作为一种优选的技术方案，所述上部水冷壁包括上部水冷壁前墙入口集箱、上部水冷壁侧墙入口集箱、上部水冷壁后墙入口集箱、上部水冷壁前墙、上部水冷壁侧墙、上部水冷壁后墙、上部水冷壁前墙出口集箱、上部水冷壁侧墙出口集箱、上部水冷壁后墙出口集箱、上部水冷壁出口连接管、水冷壁出口混合集箱，上部水冷壁前墙分别与上部水冷壁前墙入口集箱、上部水冷壁前墙出口集箱相连，上部水冷壁侧墙分别与上部水冷壁侧墙入口集箱、上部水冷壁侧墙出口集箱相连，上部水冷壁后墙分别与上部水冷壁后墙入口集箱、上部水冷壁后墙出口集箱相连。As a preferred technical solution, 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.
作为一种优选的技术方案，下部水冷壁、上部水冷壁、汽冷壁均为膜式壁。As a preferred technical solution, the lower water-cooled wall, the upper water-cooled wall, and the steam-cooled wall are all membrane walls.
作为一种优选的技术方案，下部水冷壁采用螺旋管圈或垂直管圈，上
部水冷壁采用螺旋管圈或垂直管圈。As a preferred technical solution, the lower water-cooling wall adopts spiral pipe coil or vertical pipe coil, and 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.
一种带有汽冷壁的锅炉系统，包括所述的一种带有汽冷壁的锅炉炉膛，还包括与上部水冷壁、汽冷壁分别连接的汽水分离器、与汽冷壁连接的顶棚过热器。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.
作为一种优选的技术方案，还包括与下部水冷壁连接的省煤器，与下部水冷壁、上部水冷壁分别水冷壁中间混合集箱，与顶棚过热器连接的包墙过热器。As a preferred technical solution, 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.
作为一种优选的技术方案，汽水分离器连接有水冷壁混合集箱至汽水分离器连接管、汽水分离器出口蒸汽连接管。As a preferred technical solution, 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.
本发明相比于现有技术，具有以下有益效果：Compared with the prior art, the present invention has the following beneficial effects:
(1)本发明改变炉膛只采用水冷壁的固有思维和做法，创新性地提出将上部部分炉膛区域改为汽冷壁；(1) 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;
(2)本发明通过将锅炉上部部分炉膛膜式壁工质换为蒸汽，以降低水冷壁上部炉膛的吸热及出口工质温度，提高水冷壁安全性，解决锅炉参数更高时的水冷壁安全问题及材质升档问题；(2) 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;
(3)本发明大幅降低上部水冷壁出口工质偏差，消除水冷壁中低负荷水冷壁偏差大的问题，适应锅炉灵活性运行。(3) 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.
图1为常规水冷壁炉膛结构示意图；Figure 1 is a schematic diagram of the structure of a conventional water-cooled fireplace;
图2为本发明带有汽冷壁的炉膛结构示意图；Figure 2 is a schematic structural diagram of a furnace with a steam-cooled wall according to the present invention;
图3为本发明系统流程图；Figure 3 is a system flow chart of the present invention;
图4为带有汽冷壁的W火焰锅炉炉膛(方式一)；Figure 4 shows the W-flame boiler furnace with steam-cooled wall (mode 1);
图5为带有汽冷壁的W火焰锅炉炉膛(方式二)；Figure 5 shows the W flame boiler furnace with steam cooling wall (mode 2);
图6为带有汽冷壁的常规煤粉锅炉炉膛(方式一)；Figure 6 shows a conventional pulverized coal boiler furnace with steam-cooled walls (mode 1);
图7为带有汽冷壁的常规煤粉锅炉炉膛(方式二)；Figure 7 shows a conventional pulverized coal boiler furnace with steam-cooled walls (mode 2);
图8为实施例2中锅炉炉膛基本尺寸图。
Figure 8 is a basic dimensional view of the boiler furnace in Embodiment 2.
附图中标记及相应的零部件名称：1、省煤器；2、下部水冷壁；3、水冷壁中间混合集箱；4、上部水冷壁；5、汽水分离器；6、汽冷壁；7、顶棚过热器；8、包墙过热器；211、下部水冷壁前墙入口集箱；212、下部水冷壁侧墙入口集箱；213、下部水冷壁后墙入口集箱；214、下部水冷壁前墙；215、下部水冷壁侧墙；216、下部水冷壁后墙；217、下部水冷壁前墙出口集箱；218、下部水冷壁侧墙出口集箱；219、下部水冷壁后墙出口集箱；411、上部水冷壁前墙入口集箱；412、上部水冷壁侧墙入口集箱；413、上部水冷壁后墙入口集箱；414、上部水冷壁前墙；415、上部水冷壁侧墙；416、上部水冷壁后墙；417、上部水冷壁前墙出口集箱；418、上部水冷壁侧墙出口集箱；419、上部水冷壁后墙出口集箱；4110、上部水冷壁出口连接管；4111、水冷壁出口混合集箱；611、汽冷壁前墙入口集箱；612、汽冷壁侧墙入口集箱；613、汽冷壁后墙入口集箱；614、汽冷壁前墙；615、汽冷壁侧墙；616、汽冷壁后墙；617、汽冷壁前墙出口集箱；618、汽冷壁侧墙出口集箱；619、汽冷壁后墙出口集箱；511、水冷壁混合集箱至汽水分离器连接管；512、汽水分离器出口蒸汽连接管；811、水平烟道侧包墙；812、后竖井前包墙；813、后竖井中隔墙；814、后竖井后包墙；815、后竖井侧包墙；816、水平烟道底包墙。Marks and corresponding parts names in the drawings: 1. Economizer; 2. Lower water wall; 3. Mixing header in the middle of water wall; 4. Upper water wall; 5. Steam water separator; 6. Steam wall; 7. Ceiling superheater; 8. Wall-clad superheater; 211. Front wall entrance header of the lower water-cooling wall; 212. Lower water-cooling wall side wall entrance header; 213. Lower water-cooling wall rear wall entrance header; 214. Lower water-cooling wall entrance header 215. Lower water-cooling wall side wall; 216. Lower water-cooling wall rear wall; 217. Lower water-cooling wall front wall outlet header; 218. Lower water-cooling wall side wall outlet header; 219. 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. Upper water-cooling wall rear wall; 417. Upper water-cooling wall front wall outlet header; 418. Upper water-cooling wall side wall outlet header; 419. Upper water-cooling wall rear wall outlet header; 4110. Upper water-cooling wall outlet connection pipe; 4111, water-cooled wall outlet mixing header; 611, steam-cooled wall front wall inlet header; 612, steam-cooled wall side wall inlet header; 613, steam-cooled wall rear wall inlet header; 614, steam-cooled wall front wall inlet header wall; 615, steam-cooled wall side wall; 616, steam-cooled wall rear wall; 617, steam-cooled wall front wall outlet header; 618, steam-cooled wall side wall outlet header; 619, steam-cooled wall rear wall outlet header ; 511. The connecting pipe from the water-cooled wall mixing header to the steam-water separator; 512. The steam connecting pipe at the outlet of the steam-water separator; 811. The side wall of the horizontal flue; 812. The front wall of the rear shaft; 813. The middle partition wall of the rear shaft; 814. The back wall of the rear shaft; 815. The side wall of the rear shaft; 816. The bottom wall of the horizontal flue.
下面结合实施例及附图，对本发明作进一步的详细说明，但本发明的实施方式不限于此。The present invention will be further described in detail below with reference to the examples and drawings, but the implementation of the present invention is not limited thereto.
实施例1Example 1
如图1至图8所示，一种带有汽冷壁的锅炉炉膛，包括从下至上依次连接的下部水冷壁2、上部水冷壁4、汽冷壁6。As shown in Figures 1 to 8, 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.
作为一种优选的技术方案，所述汽冷壁6包括汽冷壁前墙入口集箱611、汽冷壁侧墙入口集箱612、汽冷壁后墙入口集箱613、汽冷壁前墙614、汽
冷壁侧墙615、汽冷壁后墙616、汽冷壁前墙出口集箱617、汽冷壁侧墙出口集箱618、汽冷壁后墙出口集箱619,汽冷壁前墙614分别与汽冷壁前墙入口集箱611、汽冷壁前墙出口集箱617相连,汽冷壁侧墙615分别与汽冷壁侧墙入口集箱612、汽冷壁侧墙出口集箱618相连；汽冷壁后墙616分别与汽冷壁后墙入口集箱613、汽冷壁后墙出口集箱619相连。As a preferred technical solution, 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.
作为一种优选的技术方案，所述下部水冷壁2包括下部水冷壁前墙入口集箱211、下部水冷壁侧墙入口集箱212、下部水冷壁后墙入口集箱213、下部水冷壁前墙214、下部水冷壁侧墙215、下部水冷壁后墙216、下部水冷壁前墙出口集箱217、下部水冷壁侧墙出口集箱218、下部水冷壁后墙出口集箱219，下部水冷壁前墙214分别与下部水冷壁前墙入口集箱211、下部水冷壁前墙出口集箱217相连，下部水冷壁侧墙215分别与下部水冷壁侧墙入口集箱212、下部水冷壁侧墙出口集箱218相连，下部水冷壁后墙216分别与下部水冷壁后墙入口集箱213、下部水冷壁后墙出口集箱219相连。As a preferred technical solution, 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. Lower water-cooling wall side wall outlet header 218. Lower water-cooling wall rear wall outlet header 219. Lower water-cooling wall front wall outlet header. 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.
作为一种优选的技术方案，所述上部水冷壁4包括上部水冷壁前墙入口集箱411、上部水冷壁侧墙入口集箱412、上部水冷壁后墙入口集箱413、上部水冷壁前墙414、上部水冷壁侧墙415、上部水冷壁后墙416、上部水冷壁前墙出口集箱417、上部水冷壁侧墙出口集箱418、上部水冷壁后墙出口集箱419、上部水冷壁出口连接管4110、水冷壁出口混合集箱4111，上部水冷壁前墙414分别与上部水冷壁前墙入口集箱411、上部水冷壁前墙出口集箱417相连，上部水冷壁侧墙415分别与上部水冷壁侧墙入口集箱412、上部水冷壁侧墙出口集箱418相连，上部水冷壁后墙416分别与上部水冷壁后墙入口集箱413、上部水冷壁后墙出口集箱419相连。As a preferred technical solution, 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.
作为一种优选的技术方案，下部水冷壁2、上部水冷壁4、汽冷壁6均为膜式壁。As a preferred technical solution, the lower water-cooled wall 2, the upper water-cooled wall 4, and the steam-cooled wall 6 are all membrane walls.
作为一种优选的技术方案，下部水冷壁2采用螺旋管圈或垂直管圈，
上部水冷壁4采用螺旋管圈或垂直管圈。As a preferred technical solution, 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.
一种带有汽冷壁的锅炉系统，还包括与上部水冷壁4、汽冷壁6分别连接的汽水分离器5、与汽冷壁6连接的顶棚过热器7。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.
作为一种优选的技术方案，还包括与下部水冷壁2连接的省煤器1，与下部水冷壁2、上部水冷壁4分别水冷壁中间混合集箱3，与顶棚过热器7连接的包墙过热器8。As a preferred technical solution, 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. Superheater 8.
作为一种优选的技术方案，汽水分离器5连接有水冷壁混合集箱至汽水分离器连接管511、汽水分离器出口蒸汽连接管512。As a preferred technical solution, 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.
本发明提出一种带有汽冷壁的锅炉炉膛及系统，改变炉膛只采用水冷壁的固有思维和做法(图1)，创新性地提出将上部部分炉膛区域改为汽冷壁(图2)。通过将锅炉上部部分炉膛膜式壁工质换为蒸汽，以降低水冷壁上部炉膛的吸热及出口工质温度，提高水冷壁安全性，解决锅炉参数更高时的水冷壁安全问题及材质升档问题；大幅降低上部水冷壁出口工质偏差，消除水冷壁中低负荷水冷壁偏差大的问题，适应锅炉灵活性运行。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). . By replacing the working fluid of the diaphragm wall in the upper part of the boiler with steam, 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.
本发明提出一种带有汽冷壁的锅炉炉膛及系统，通过将锅炉上部炉膛工质换为蒸汽，以降低水冷炉膛的吸热，降低水冷壁壁温偏差及出口工质温度，提高水冷壁安全性。The present invention proposes a boiler furnace and system with a steam-cooled wall. By replacing the working fluid in the upper furnace furnace with steam, 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.
本发明可以解决如下问题：The present invention can solve the following problems:
1)降低煤电机组频繁调峰带来的水冷壁壁温偏差，防止水冷壁拉裂；如将该技术应用于超超临界W火焰锅炉，则可解决因给水温度提高带来的水冷壁偏差增大、水动力安全问题。1) Reduce the temperature deviation of the water-cooled wall caused by frequent peak shaving of coal power units and prevent the water-cooled wall from cracking; if this technology is applied to ultra-supercritical W-flame boilers, it can solve the water-cooled wall deviation caused by the increase in feed water temperature. Increase, hydrodynamic safety issues.
2)降低水冷壁偏差管壁温，提高水冷壁安全性；2) Reduce the deviation of the water wall wall temperature and improve the safety of the water wall;
解决锅炉参数更高时的水冷壁安全问题及材质升档问题，为630℃/650℃/700℃锅炉炉膛设计提供一种解决思路。It solves the water-cooled wall safety issues and material upgrading issues when the boiler parameters are higher, and provides a solution for the design of 630℃/650℃/700℃ boiler furnaces.
实施例2Example 2
如图1至图8所示，作为实施例1的进一步优化，本实施例还包括以
下技术特征：As shown in Figures 1 to 8, as a further optimization of Embodiment 1, this embodiment also includes The following technical characteristics:
一种带有汽冷壁的锅炉炉膛及系统，包括：省煤器、下部水冷壁、水冷壁中间混合集箱、上部水冷壁、汽水分离器、汽冷壁、顶棚过热器、包墙过热器。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 .
锅炉可以是W型火焰锅炉，也可以是常规煤粉锅炉(包括对冲燃烧锅炉和四角切圆燃烧锅炉)。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).
锅炉给水经省煤器后依次进入下部水冷壁、水冷壁中间混合集箱和上部水冷壁，然后进入汽水分离器，汽水分离器引出的饱和蒸汽依次进入炉膛上部的汽冷壁、顶棚过热器、包墙过热器，最后再进入下一级过热器。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.
锅炉炉膛从下到上依次由下部水冷壁、上部水冷壁、汽冷壁组成。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.
下部水冷壁由下部水冷壁前墙入口集箱、下部水冷壁侧墙入口集箱、下部水冷壁后墙入口集箱、下部水冷壁前墙、下部水冷壁侧墙、下部水冷壁后墙、下部水冷壁前墙出口集箱、下部水冷壁侧墙出口集箱、下部水冷壁后墙出口集箱组成。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.
下部水冷壁可以是螺旋管圈，也可以是垂直管。The lower water wall can be a spiral tube coil or a vertical tube.
上部水冷壁由上部水冷壁前墙入口集箱、上部水冷壁侧墙入口集箱、上部水冷壁后墙入口集箱、上部水冷壁前墙、上部水冷壁侧墙、上部水冷壁后墙、上部水冷壁前墙出口集箱、上部水冷壁侧墙出口集箱、上部水冷壁后墙出口集箱、上部水冷壁出口连接管、水冷壁出口混合集箱组成。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.
上部水冷壁可以是螺旋管圈，也可以是垂直管。The upper water-cooling wall can be a spiral tube coil or a vertical tube.
下部水冷壁和上部水冷壁之间设置混合集箱，下部水冷壁的工质从下部水冷壁出口集箱引出至混合集箱，然后再由混合集箱引至上部水冷壁入口集箱。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.
汽冷壁由汽冷壁前墙入口集箱、汽冷壁侧墙入口集箱、汽冷壁后墙入口集箱、汽冷壁前墙、汽冷壁侧墙、汽冷壁后墙、汽冷壁前墙出口集箱、汽冷壁侧墙出口集箱、汽冷壁后墙出口集箱组成。
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.
上部水冷壁出口的工质经水冷壁混合集箱至汽水分离器连接管引入汽水分离器，分离器出口的工质经出口蒸汽连接管引入汽冷壁。锅炉启动/停炉阶段，汽水分离器分离出的水进入锅炉启动系统中。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. During the boiler start-up/stop phase, the water separated by the steam-water separator enters the boiler start-up system.
锅炉水平烟道底部可以是水冷壁，也可以是汽冷包墙过热器。若是水冷壁，则其为上部水冷壁后墙(见图4和图6)；若是汽冷包墙过热器，则其水平烟道底包墙(见图5和图7)。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).
以某1000MW高效超超临界对冲燃烧一次再热锅炉的不同方案为例进行说明：Take the different solutions of a 1000MW high-efficiency ultra-supercritical offset combustion primary reheat boiler as an example to illustrate:
锅炉基本信息：
Boiler basic information:
Boiler basic information:
方案一为传统方案：锅炉炉膛高度共75m，全部是水冷炉膛，水冷壁分为上下两部分，下部为螺旋管圈，高度～53m，上部为垂直管圈，高度～22m。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, and the upper part is a vertical tube ring with a height of ~22m.
方案二为按照本发明技术的方案：锅炉炉膛高度共75m，从下到上依次为下部螺旋水冷壁、上部垂直水冷壁、汽冷壁。其中汽冷壁高度～15m。The second solution is based on the technology of the present invention: 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.
按照上述两方案，锅炉炉膛不同高度的水冷壁工质温度及壁温对比如
下表：
According to the above two schemes, the comparison of the working fluid temperature and wall temperature of the water-cooled wall at different heights of the boiler furnace is as follows: The following table:
According to the above two schemes, the comparison of the working fluid temperature and wall temperature of the water-cooled wall at different heights of the boiler furnace is as follows: The following table:
从计算结果可以看出，采用本发明技术，可以降低水冷壁出口工质温度，同时也可以降低水冷壁出口壁温偏差。It can be seen from the calculation results that by using the technology of the present invention, the temperature of the working fluid at the outlet of the water-cooled wall can be reduced, and at the same time, the temperature deviation at the outlet of the water-cooled wall can also be reduced.
具体实施例：以某1000MW高效超超临界对冲燃烧一次再热锅炉为例进行说明：
Specific examples: Taking a 1000MW high-efficiency ultra-supercritical offset combustion primary reheat boiler as an example to illustrate:
按照本发明实施的锅炉炉膛基本尺寸如下表：
The basic dimensions of the boiler furnace implemented according to the present invention are as follows:
The basic dimensions of the boiler furnace implemented according to the present invention are as follows:
如上所述，可较好地实现本发明。As described above, the present invention can be better implemented.
本说明书中所有实施例公开的所有特征，或隐含公开的所有方法或过程中的步骤，除了互相排斥的特征和/或步骤以外，均可以以任何方式组合和/或扩展、替换。All features disclosed in all embodiments in this specification, or all steps in methods or processes implicitly disclosed, except for mutually exclusive features and/or steps, may be combined and/or extended or replaced in any manner.
以上所述，仅是本发明的较佳实施例而已，并非对本发明作任何形式上的限制，依据本发明的技术实质，在本发明的精神和原则之内，对以上实施例所作的任何简单的修改、等同替换与改进等，均仍属于本发明技术方案的保护范围之内。
The above are only preferred embodiments of the present invention and do not limit the present invention in any form. According to the technical essence of the present invention and within the spirit and principles of the present invention, any simple modifications to the above embodiments may be made. Modifications, equivalent substitutions and improvements, etc., all still fall within the protection scope of the technical solution of the present invention.
Claims (9)
- 一种带有汽冷壁的锅炉炉膛，其特征在于，包括从下至上依次连接的下部水冷壁(2)、上部水冷壁(4)、汽冷壁(6)。A boiler furnace with a steam-cooled wall is characterized in that it 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.
- 根据权利要求1所述的一种带有汽冷壁的锅炉炉膛，其特征在于，所述汽冷壁(6)包括汽冷壁前墙入口集箱(611)、汽冷壁侧墙入口集箱(612)、汽冷壁后墙入口集箱(613)、汽冷壁前墙(614)、汽冷壁侧墙(615)、汽冷壁后墙(616)、汽冷壁前墙出口集箱(617)、汽冷壁侧墙出口集箱(618)、汽冷壁后墙出口集箱(619),汽冷壁前墙(614)分别与汽冷壁前墙入口集箱(611)、汽冷壁前墙出口集箱(617)相连,汽冷壁侧墙(615)分别与汽冷壁侧墙入口集箱(612)、汽冷壁侧墙出口集箱(618)相连；汽冷壁后墙(616)分别与汽冷壁后墙入口集箱(613)、汽冷壁后墙出口集箱(619)相连。A boiler furnace with a steam-cooled wall according to claim 1, characterized in that the steam-cooled wall (6) includes a steam-cooled wall front wall inlet header (611), a steam-cooled wall side wall inlet header Box (612), steam cooling wall rear wall inlet header (613), steam cooling wall front wall (614), steam cooling 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) and steam-cooling wall front wall entrance header (611) respectively. ) are connected to the steam-cooling wall front wall outlet header (617), and the steam-cooling wall side wall (615) is connected to the steam-cooling wall side wall entrance header (612) and the steam-cooling wall side wall outlet header (618) 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.
- 根据权利要求1所述的一种带有汽冷壁的锅炉炉膛，其特征在于，所述下部水冷壁(2)包括下部水冷壁前墙入口集箱(211)、下部水冷壁侧墙入口集箱(212)、下部水冷壁后墙入口集箱(213)、下部水冷壁前墙(214)、下部水冷壁侧墙(215)、下部水冷壁后墙(216)、下部水冷壁前墙出口集箱(217)、下部水冷壁侧墙出口集箱(218)、下部水冷壁后墙出口集箱(219)，下部水冷壁前墙(214)分别与下部水冷壁前墙入口集箱(211)、下部水冷壁前墙出口集箱(217)相连，下部水冷壁侧墙(215)分别与下部水冷壁侧墙入口集箱(212)、下部水冷壁侧墙出口集箱(218)相连，下部水冷壁后墙(216)分别与下部水冷壁后墙入口集箱(213)、下部水冷壁后墙出口集箱(219)相连。A boiler furnace with a steam-cooled wall according to claim 1, characterized in that 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 Box (212), lower water-cooling wall rear wall inlet header (213), lower water-cooling wall front wall (214), lower water-cooling wall side wall (215), lower water-cooling wall rear wall (216), lower water-cooling wall front wall outlet header (217), lower water-cooling wall side wall outlet header (218), lower water-cooling wall rear wall outlet header (219), lower water-cooling wall front wall (214) and lower water-cooling wall front wall entrance header (211) respectively ) and the lower water-cooling wall front wall outlet header (217) are connected, and the lower water-cooling wall side wall (215) is connected to the lower water-cooling wall side wall inlet header (212) and the lower water-cooling wall side wall outlet header (218) respectively. 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.
- 根据权利要求1所述的一种带有汽冷壁的锅炉炉膛，其特征在于，所述上部水冷壁(4)包括上部水冷壁前墙入口集箱(411)、上部水冷壁侧墙入口集箱(412)、上部水冷壁后墙入口集箱(413)、上部水冷壁前墙(414)、 上部水冷壁侧墙(415)、上部水冷壁后墙(416)、上部水冷壁前墙出口集箱(417)、上部水冷壁侧墙出口集箱(418)、上部水冷壁后墙出口集箱(419)、上部水冷壁出口连接管(4110)、水冷壁出口混合集箱(4111)，上部水冷壁前墙(414)分别与上部水冷壁前墙入口集箱(411)、上部水冷壁前墙出口集箱(417)相连，上部水冷壁侧墙(415)分别与上部水冷壁侧墙入口集箱(412)、上部水冷壁侧墙出口集箱(418)相连，上部水冷壁后墙(416)分别与上部水冷壁后墙入口集箱(413)、上部水冷壁后墙出口集箱(419)相连。A boiler furnace with a steam-cooled wall according to claim 1, characterized in that 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 box (412), upper water-cooling wall rear wall entrance header (413), upper water-cooling wall front wall (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), the upper water-cooling wall outlet connecting pipe (4110), the water-cooling wall outlet mixing header (4111), the upper water-cooling wall front wall (414) and the upper water-cooling wall front wall inlet header (411), the upper water-cooling wall front wall respectively The wall outlet header (417) is connected, the upper water-cooled wall side wall (415) is connected to the upper water-cooled wall side wall inlet header (412) and the upper water-cooled wall side wall outlet header (418) respectively, and the upper water-cooled wall rear wall (418) 416) are respectively connected to the upper water-cooling wall rear wall inlet header (413) and the upper water-cooling wall rear wall outlet header (419).
- 根据权利要求1至4任一项所述的一种带有汽冷壁的锅炉炉膛，其特征在于，下部水冷壁(2)、上部水冷壁(4)、汽冷壁(6)均为膜式壁。A boiler furnace with steam-cooled walls according to any one of claims 1 to 4, characterized in that the lower water-cooled wall (2), the upper water-cooled wall (4) and the steam-cooled wall (6) are all membrane style wall.
- 根据权利要求5所述的一种带有汽冷壁的锅炉炉膛，其特征在于，下部水冷壁(2)采用螺旋管圈或垂直管圈，上部水冷壁(4)采用螺旋管圈或垂直管圈。A boiler furnace with a steam-cooled wall according to claim 5, characterized in that the lower water-cooled wall (2) adopts a spiral tube coil or a vertical tube coil, and the upper water-cooled wall (4) adopts a spiral tube coil or a vertical tube lock up.
- 一种带有汽冷壁的锅炉系统，其特征在于，包括权利要求1至6任一项所述的一种带有汽冷壁的锅炉炉膛，还包括与上部水冷壁(4)、汽冷壁(6)分别连接的汽水分离器(5)、与汽冷壁(6)连接的顶棚过热器(7)。A boiler system with a steam-cooled wall, characterized in that it includes a boiler furnace with a steam-cooled wall according to any one of claims 1 to 6, and also includes an upper water-cooled wall (4), a steam-cooled wall A steam-water separator (5) connected to the wall (6) and a ceiling superheater (7) connected to the steam cooling wall (6) respectively.
- 根据权利要求7所述的一种带有汽冷壁的锅炉系统，其特征在于，还包括与下部水冷壁(2)连接的省煤器(1)，与下部水冷壁(2)、上部水冷壁(4)分别水冷壁中间混合集箱(3)，与顶棚过热器(7)连接的包墙过热器(8)。A boiler system with a steam-cooled wall according to claim 7, characterized in that it also includes an economizer (1) connected to the lower water-cooled wall (2), and an economizer (1) connected to the lower water-cooled wall (2) and the upper water-cooled wall. The wall (4) has a water-cooled wall middle mixing header (3) and a wall-clad superheater (8) connected to the ceiling superheater (7).
- 根据权利要求7或8所述的一种带有汽冷壁的锅炉系统，其特征在于，汽水分离器5连接有水冷壁混合集箱至汽水分离器连接管(511)、汽水分离器出口蒸汽连接管(512)。 A boiler system with a steam-cooled wall according to claim 7 or 8, characterized in that the steam-water separator 5 is connected with a water-cooled wall mixing header to the steam-water separator connecting pipe (511), the steam-water separator outlet steam Connecting pipe (512).
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| CN111594828A (en) * | 2020-04-10 | 2020-08-28 | 中国大唐集团科学技术研究院有限公司火力发电技术研究院 | Anti-slagging method based on boiler design angle |
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2022
- 2022-05-16 CN CN202210528118.6A patent/CN114935158B/en active Active
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2023
- 2023-03-09 WO PCT/CN2023/080468 patent/WO2023221609A1/en unknown
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Also Published As
| Publication number | Publication date |
|---|---|
| CN114935158B (en) | 2023-05-26 |
| CN114935158A (en) | 2022-08-23 |
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