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WO2011069333A1 - 一种锅炉屏式受热面管束与炉顶管之间的保温和密封装置 - Google Patents

一种锅炉屏式受热面管束与炉顶管之间的保温和密封装置 Download PDF

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Publication number
WO2011069333A1
WO2011069333A1 PCT/CN2010/001978 CN2010001978W WO2011069333A1 WO 2011069333 A1 WO2011069333 A1 WO 2011069333A1 CN 2010001978 W CN2010001978 W CN 2010001978W WO 2011069333 A1 WO2011069333 A1 WO 2011069333A1
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WIPO (PCT)
Prior art keywords
tube bundle
heating surface
insulating material
surface tube
insulation
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2010/001978
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English (en)
French (fr)
Inventor
刘义
陶虹新
刘建斌
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SHANGHAI BOILIER WORKS Ltd
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SHANGHAI BOILIER WORKS Ltd
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Filing date
Publication date
Application filed by SHANGHAI BOILIER WORKS Ltd filed Critical SHANGHAI BOILIER WORKS Ltd
Publication of WO2011069333A1 publication Critical patent/WO2011069333A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • F22B37/10—Water tubes; Accessories therefor
    • F22B37/107—Protection of water tubes
    • 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
    • F22B37/10—Water tubes; Accessories therefor
    • F22B37/105—Penetrations of tubes through a wall and their sealing

Definitions

  • the invention relates to a device for preventing high temperature flue gas from leaking at a screen heating surface through a top tube bundle, and at the same time ensuring that the outer surface temperature reaches a safety standard, and particularly relates to a boiler screen type heating surface tube bundle topping Tube insulation and sealing device.
  • the screen type heating surface tube bundle in the boiler passes through the top tube of the furnace, and there is a certain gap between the two, which requires sealing design and heat preservation.
  • the difference in medium temperature between the two due to the difference in medium temperature between the two, there is a difference in expansion, and it is necessary to consider the sealing structure. Expansion problem.
  • the prior art utilizes a sealed box welded to the top tube bundle to seal the screen-type heated surface tube bundle and the top tube, and the metal expansion joint absorbs the expansion displacement between the screen-type heated surface tube bundle and the furnace tube. Finally, the sealing box, the metal expansion joint, the screen heating surface tube bundle, and the top tube are integrally covered with a temperature-preserving material to reduce the surface temperature.
  • the technology uses metal expansion joints to absorb and expand, and can only absorb the difference in expansion between the screen-type heating surface tube bundle and the top tube of the furnace roof within a limited range, and the expansion material is prone to occur due to the expansion structure in the overall insulation coating. The phenomenon of being pulled down, thus affecting the safe operation of the boiler. Disclosure of invention
  • the object of the present invention is to provide a boiler screen type heating surface tube bundle topping tube heat insulating and sealing device which is made of an insulating material, is not easily damaged and has a simple structure.
  • the technical proposal of the present invention provides a boiler screen type heating surface tube bundle topping tube heat insulating and sealing device, which is used for contacting the contact between the top tube and the screen type heating surface tube bundle. Sealed
  • the device comprises a sealing box which is sleeved outside the contact between the above-mentioned screen type heating surface tube bundle and the top tube;
  • a first insulating material layer disposed outside the panel heating surface tube bundle; and a non-metallic expansion joint disposed between the first insulating material layer and the second insulating material layer.
  • the above sealed box is provided with a refractory heat insulating material.
  • the first layer of insulating material comprises a plurality of layers of different insulating materials.
  • the second layer of insulating material comprises a plurality of layers of different insulating materials.
  • the above non-metallic expansion joint is provided with an insulating material.
  • the invention relates to a boiler screen type heating surface tube bundle top tube insulation and sealing device compared with the prior art sealing device, which has the advantage that the first heat insulating material layer is provided on the upper part of the screen heating surface tube bundle,
  • the second insulation material layer is disposed on the top pipe, and the first insulation material layer and the second insulation material layer are relatively independent, and the upper part of the screen heating surface tube bundle and the furnace top tube are independently insulated to ensure smooth expansion during operation of the boiler;
  • the non-metallic expansion joint of the invention absorbs the difference between the expansion of the screen-type heating surface tube bundle and the furnace top tube, thereby avoiding the damage of the furnace roof insulation material due to the expansion of the boiler and ensuring the safety of the worker;
  • the invention adopts a non-metallic expansion joint, and the non-metal expansion joint is provided with a heat insulating material, and the non-metallic expansion joint absorbs the difference between the screen type heating surface tube bundle and the top tube of the furnace, and achieves the purpose of heat preservation.
  • the outer wall temperature of the boiler is expanded to meet the safety standard;
  • the invention is provided with the first heat insulating material layer and the second heat insulating material layer, and the fireproof heat insulating material is arranged in the sealed box, thereby greatly reducing the contact between the screen heating surface and the furnace top tube bundle
  • the external surface temperature reduces the heat loss of the boiler and ensures the safety of the operator.
  • FIG. 1 is a schematic view showing the structure of a heat insulating and sealing device for a boiler panel-type heated face tube bundled through tube. The best way to implement the invention
  • the present invention discloses a boiler screen type heating surface tube beam-through furnace top tube heat preservation and sealing device, which is used for sealing the contact between the furnace top tube 2 and the screen type heating surface tube bundle .
  • the top pipe 2 is horizontally disposed at the top of the boiler.
  • the screen heating surface tube bundle 1 is vertically disposed at the top end of the boiler. The lower half of the screen heating surface tube bundle 1 passes through the top of the boiler and enters the interior of the boiler.
  • the screen type heating surface tube bundle 1 and the furnace top tube 2 have a contact point, the boiler panel type heating surface tube bundles the furnace top tube insulation and sealing device, that is, the screen type heating surface tube bundle 1 and the furnace top tube 2 The contact between the portions is sealed, and the screen-type heated tube bundle 1 and the top tube 2 are insulated.
  • the boiler screen type heating surface tube bundles the top pipe insulation and sealing device comprises a sealing box 3 ⁇ 4.
  • the sealing box 3 is arranged on the top pipe 2, and the sealing box 3 is sealedly connected with the contact surface between the top pipe 2 and the boiler.
  • the screen type heating surface tube bundle 1 is vertically stringed in the sealing case 3, and the contact surface between the sealing box 3 and the screen type heating surface tube bundle 1 is also sealedly connected.
  • the seal box 3 seals the contact portion of the screen-type heated face tube bundle 1 with the furnace top tube 2 in the inner cavity of the sealed casing 3.
  • a refractory heat retaining material 4 is cast in the sealed box 3.
  • the contact between the screen type heating surface tube bundle 1 and the top tube 2 is sealed in the sealed box 3 to prevent smoke leakage at the place.
  • the refractory insulating material 4 also serves as a heat insulating effect.
  • the boiler screen type heating surface tube bundle top tube insulation and sealing device further comprises a first insulation material layer 5, a second insulation material layer 6 and a non-metal expansion joint 7.
  • the second layer of insulating material 6 is tightly sleeved on the outside of the sealed box 3.
  • the second layer of insulating material 6 is made of several layers of insulating materials of different materials, and the insulating materials of the plurality of layers are selected according to national standards, according to the temperature conditions of the furnaces of different sizes. According to the standard calculated temperature, the outer part is generally wrapped with ceramic fiber and high temperature glass wool.
  • the several layers of thermal insulation material are sequentially stacked in the vertical direction.
  • the sealing box 3 wrapped by the second thermal insulation material layer 6 is horizontally arranged, for the convenience of installation, the second A plurality of insulating materials within the layer of insulating material 6 are arranged in a vertically stacked manner.
  • the first heat insulating material layer 5 is tightly sleeved on the outside of the upper end of the screen heating surface tube bundle 1.
  • the first heat insulating material layer 5 is also made of several layers of different materials of heat insulating material, and the outer part is generally wrapped with ceramic 'fiber and high temperature glass wool.
  • the plurality of layers of thermal insulation materials are selected according to national standards, and the plurality of layers of thermal insulation materials are selected to be vertically stacked in a direction perpendicular to the radial direction of the screen-type heated surface tube bundle 1 according to the temperature conditions of the furnaces of different sizes according to the standard temperature.
  • the panel-type heated surface tube bundle 1 wrapped in the layer 5 is vertically arranged.
  • a plurality of insulation materials in the first insulation layer 5 are arranged in a laterally stacked manner.
  • the non-metallic expansion joint 7 is disposed on the first heat insulating material layer 5 and the second heat insulating material layer 6 , and the non-metal expansion joint 7 is closely adhered to the first heat insulating material layer 5 and the second heat insulating material layer 6 respectively.
  • the non-metallic expansion joint 7 is a device with a non-metallic material texture and capable of absorbing expansion, absorbing the difference in expansion between the screen-type heating surface tube bundle 1 and the furnace top tube 2, avoiding the first insulation material layer 5 and the second layer of insulating material 6 are damaged by the expansion of the boiler, which is different from the corrugated board shell of the metal expansion joint.
  • the non-metallic expansion joint 7 is filled with a heat insulating material, and the heat insulating material is also used.
  • the heat insulating material in the non-metal expansion joint can be made of different materials according to the manufacturer of the non-metallic expansion joint. Material.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Furnace Housings, Linings, Walls, And Ceilings (AREA)

Description

一种锅炉屏式受热面管束与炉顶管之间的保温和密封装置
技术领域
本发明涉及一种用于防止高温烟气在屏式受热面穿炉顶管束处发生泄 漏， 同时保证此处外表面温度达到安全标准的装置， 具体涉及一种锅炉屏式 受热面管束穿炉顶管保温和密封装置。 背景技术
目前， 锅炉中的屏式受热面管束穿过炉顶管， 两者之间有一定间隙， 需 要进行密封设计和保温， 同时由于两者间介质温度不同， 存在膨胀差， 有必 要考虑密封结构的膨胀问题。
现有技术利用焊接于炉顶管束的密封盒实现屏式受热面管束与炉顶管的 密封， 金属膨胀节吸收屏式受热面管束与炉项管之间的膨胀位移。 最后用保 温材料将密封盒、 金属膨胀节、 屏式受热面管束、 炉顶管整体包覆， 以降低 此处表面温度。 该技术采用金属膨胀节吸收膨胀， 只能在有限范围内吸收炉 顶的屏式受热面管束与炉顶管之间的膨胀差， 且由于在整体保温包覆中存在 膨胀结构， 容易出现保温材料被拉坏的现象， 从而影响锅炉安全运行。 发明的公开
本发明的目的是提供一种锅炉屏式受热面管束穿炉顶管保温和密封装 置， 其采用保温材料， 不易损坏且结构简单。
为实现上述目的， 本发明的技术方案是提供了一种锅炉屏式受热面管束 穿炉顶管保温和密封装置， 该装置用于对炉顶管与屏式受热面管束之间的接 触处进行密封；
该装置包含密封盒， 该密封盒套设在上述的屏式受热面管束与炉顶管之 间接触处的外部；
其特征是， 该装置还包含：
套设在上述的密封盒外的第二保温材料层；
1
确 认 本 套设在上述的屏式受热面管束外部的第一保温材料层； 以及， 设置在上述的第一保温材料层和第二保温材料层之间的非金属膨胀节。 上述的密封盒内设有耐火保温材料。
上述的第一保温材料层包含若干层不同保温材料。
上述的第二保温材料层包含若干层不同保温材料。
上述的非金属膨胀节内设有保温材料。 '
本发明一种锅炉屏式受热面管束穿炉顶管保温和密封装置和现有技术的 密封装置相比， 其优点在于， 本发明在屏式受热面管束上部设有第一保温材 料层， 在炉顶管上设有第二保温材料层， 第一保温材料层与第二保温材料层 相对独立， 实现屏式受热面管束上部和炉顶管均采用独立保温， 保证锅炉运 行中的膨胀顺畅；
本发明采用非金属膨胀节吸收了屏式受热面管束与炉顶管膨胀差， 避免 炉顶保温材料因锅炉膨胀出现损坏， 保障工作人员安全；
本发明采用了非金属膨胀节， 该非金属膨胀节内设有保温材料， 在用非 金属膨胀节吸收锅炉运行中屏式受热面管束与炉顶管间胀差的同时， 达到保 温的目的， 保证锅炉运行膨胀时的外壁温度达到安全标准； . 本发明设有第一保温材料层与第二保温材料层， 同时密封盒内设有耐火 保温材料， 大幅降低屏式受热面与炉顶管束接触处外表面温度， 减少锅炉散 热损失， 保证操作人员的安全。 附图的简要说明
图 1为本发明一种锅炉屏式受热面管束穿炉顶管保温和密封装置的结构 示意图。 实现本发明的最佳方式
以下结合附图， 说明本发明的具体实施方式。
如图 1所示， 本发明公开了一种锅炉屏式受热面管束穿炉顶管保温和密 封装置， 该装置用于对炉顶管 2与屏式受热面管束 .1之间接触处进行密封。 炉顶管 2水平设置在锅炉的顶端屏式受热面管束 1竖直设置在锅炉的顶端 该屏式受热面管束 1的下半部分穿过锅炉的顶端进入锅炉内部。 在锅炉的顶 端， 屏式受热面管束 1与炉顶管 2之间有一个接触处， 本发明锅炉屏式受热 面管束穿炉顶管保温和密封装置即对屏式受热面管束 1与炉顶管 2之间的接 触处进行密封处理， 同时对屏式受热面管束 1与炉顶管 2进行保温。
锅炉屏式受热面管束穿炉顶管保温和密封装置包含密封盒 ¾该密封盒 3 设置在炉顶管 2上， 密封盒 3与炉顶管 2及锅炉之间的接触面密封连接。 同 时， 屏式受热面管束 1竖直串在密封盒 3中， 该密封盒 3与屏式受热面管束 1之间的接触面也密封连接。 该密封盒 3将屏式受热面管束 1与炉顶管 2的 接触处密封设置在密封盒 3的内腔中。 同时， 在密封盒 3内还浇注有耐火保 温材料 4。将屏式受热面管束 1与炉顶管 2之间的接触处密封在密封盒 3中， 防止该处发生烟气泄露，. 该耐火保温材料 4也起到保温作用。
锅炉屏式受热面管束穿炉顶管保温和密封装置还包含第一保温材料层 5、 二保温材料层 6和非金属膨胀节 7。 第二保温材料层 6紧密套设在密封 盒 3的外部， 该第二保温材料层 6采用若干层不同材料的保温材料， 该若干 层保温材料选择按照国家标准， 根据不同大小炉型的温度条件根据标准计算 所得温度选择外部一般采用陶瓷纤维和高温玻璃棉包裹， 该若干层保温材料 以竖直方向依次层叠， 由于第二保温材料层 6包裹的密封盒 3水平设置， 为 方便安装， 第二保温材料层 6内的若干保温材料以竖向层叠方式布置。 第一 保温材料层 5紧密套设在屏式受热面管束 1的上端的外部， 该第一保温材料 层 5同样采用若干层不同材料的保温材料， 外部一般采用陶瓷'纤维和高温玻 璃棉包裹， 该若干层保温材料选择按照国家标准， 根据不同大小炉型的温度 条件根据标准计算所得温度选择该若干层保温材料以垂直于屏式受热面管束 1径向的方向依次层叠设置 由于第一保温材料层 5包裹的屏式受热面管束 1 垂直布置， 为方便安装， 第一保温才才料层 5内的若干保温材料以横向层叠方 式布置。非金属膨胀节 7设置在第一保温材料层 5和第二保温材料层 6之 |、 该非金属膨胀节 7分别于第一保温材料层 5和第二保温材料层 6紧密贴合。 该非金属膨胀节 7是一种带有非金属材料质地蒙皮的， 可以吸收膨胀的装 置， 吸收了屏式受热面管束 1与炉顶管 2之间的膨胀差， 避免第一保温材料 层 5和第二保温材料层 6因锅炉膨胀出现损坏， 区别于金属膨胀节的波紋板 外壳。 同时在非金属膨胀节 7内部填有保温材料， 也起到保温作用， 该非金 属膨胀节中的保温材料可根据非金属膨胀节生产厂家的不同而采用不同材 料。
尽管本发明的内容已经通过上述优选实施例作了详细介绍， 但应当认识 到上述的描述不应被认为是对本发明的限制。 在本领域技术人员阅读了上述 内容后， 对于本发明的多种修改和替代都将是显而易见的。 因此， 本发明的 保护范围应由所附的权利要求来限定。

Claims

权利要求
1. 一种锅炉屏式受热面管束穿炉顶管保温和密封装 S该装置用于对炉顶管
(2) 与屏式受热面管束 （1 ) 之间的接触处进行密封；
该装置包含密封盒（3 )， 所述的密封盒 (3 )套设在所述的屏式受热 面管束 （1 ) 与所述炉顶管 （2) 之间接触处的外部；
其特征在于， 该装置还包含：
套设在所述的密封盒 （3 ) 外的第二保温材料层 （6);
套设在所述的屏式受热面管束 （1 )外部的第一保温材料层 （5 ); 以 及，
设置在所述的第一保温材料层 （5) 和第二保温材料层 （6) 之间的 非金属膨胀节 （7)。
2. 如权利要求 1所述的锅炉屏式受热面管束穿炉顶管保温和密封装置其特 征在于， 所述的密封盒 （3 ) 内设有耐火保温材料 （4)。
3. 如权利要求 1所述的锅炉屏式受热面管束穿炉顶管保温和密封装置其特 征在于， 所述的第一保温材料层 （5 ) 包含若干层不同保温材料。
4. 如权利要求 1所述的锅炉屏式受热面管束穿炉顶管保温和密封装置其特 征在于， 所述的第二保温材料层 （6) 包含若干层不同保温材料。
5. 如权利要求 1所述的锅炉屏式受热面管束穿炉顶管保温和密封装置其特 征在于， 所述的非金属膨胀节 （7) 内设有保温材料。
PCT/CN2010/001978 2009-12-09 2010-12-07 一种锅炉屏式受热面管束与炉顶管之间的保温和密封装置 Ceased WO2011069333A1 (zh)

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CN2009202128273U CN201724196U (zh) 2009-12-09 2009-12-09 一种锅炉屏式受热面穿炉顶管束保温和密封装置
CN200920212827.3 2009-12-09

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CN103062752B (zh) * 2012-12-30 2016-01-20 深圳市广前电力有限公司 用于燃机余热锅炉穿墙管的隔热保温结构
CN103912860B (zh) * 2014-03-28 2015-11-04 无锡华光锅炉股份有限公司 一种用于锅炉集箱穿墙处的密封结构
CN110566931B (zh) * 2019-09-24 2020-12-01 西安热工研究院有限公司 一种防治锅炉管穿顶棚密封处开裂的穿顶棚结构及改造方法

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