WO2025086560A1 - 常减压加热炉烟道挡板更换施工方法 - Google Patents

常减压加热炉烟道挡板更换施工方法 Download PDF

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Publication number
WO2025086560A1
WO2025086560A1 PCT/CN2024/086877 CN2024086877W WO2025086560A1 WO 2025086560 A1 WO2025086560 A1 WO 2025086560A1 CN 2024086877 W CN2024086877 W CN 2024086877W WO 2025086560 A1 WO2025086560 A1 WO 2025086560A1
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Prior art keywords
flue
baffle
flue baffle
heating furnace
crane
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English (en)
French (fr)
Inventor
赵晓峰
蔡保存
屈伟伟
孟汉卓
彭丙刚
李雪
褚夫山
李吉
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China Chemical Engineering Second Construction Corp
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China Chemical Engineering Second Construction Corp
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Publication of WO2025086560A1 publication Critical patent/WO2025086560A1/zh
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
    • B66C1/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles
    • B66C1/10—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means
    • B66C1/62—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means comprising article-engaging members of a shape complementary to that of the articles to be handled
    • B66C1/66—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means comprising article-engaging members of a shape complementary to that of the articles to be handled for engaging holes, recesses, or abutments on articles specially provided for facilitating handling thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D1/00—Rope, cable, or chain winding mechanisms; Capstans
    • B66D1/02—Driving gear
    • B66D1/04—Driving gear manually operated
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
    • B66D1/00—Rope, cable, or chain winding mechanisms; Capstans
    • B66D1/28—Other constructional details

Definitions

  • the invention relates to the technical field of maintenance of a heating furnace of an oil refining atmospheric and vacuum pressure reducing device, and in particular to a construction method for replacing a flue baffle of a atmospheric and vacuum pressure reducing heating furnace.
  • the flue damper of the atmospheric pressure furnace and the reduced pressure furnace (hereinafter referred to as the heating furnace) of the atmospheric pressure and reduced pressure device is an important regulating actuator of the flue gas system of the atmospheric pressure and reduced pressure device. Good operation ensures the stability of the flue gas outlet pressure, and is used to adjust the flue gas resistance and negative pressure. It can also control the flame length, so as to achieve the purpose of controlling the uniform temperature distribution.
  • the flue damper of the heating furnace is located in a harsh environment.
  • the flue gas contains water vapor, sulfur dioxide and other acidic gases, which are easy to condense at the flue damper to form low-temperature dew point corrosion; the ash in the flue gas will be deposited on the flue damper, increasing the rotation resistance; the high operating temperature of the flue gas will cause the flue damper to form high-temperature oxidation.
  • the flue gas working conditions make the flue damper unable to rotate normally, and in severe cases, it may even fail to work and lose its adjustment function.
  • the replacement of flue dampers of atmospheric and vacuum heating furnaces is an important part of the maintenance of flue gas systems of atmospheric and vacuum devices.
  • the conventional construction method of replacing flue dampers is to use a large crane to lift the flue and flue dampers together, and then lift the flue and flue dampers into place after replacing the flue dampers. This operation is heavy for maintenance projects, long construction period, and increased construction costs.
  • the technical problem to be solved by the present invention is to provide a construction method for replacing a flue baffle of a constant pressure reducing heating furnace, thereby reducing the high-altitude hoisting conditions and achieving the purpose of safely and smoothly replacing the flue baffle.
  • a method for replacing a flue baffle of a normal and low pressure heating furnace comprises the following steps:
  • Step 1 fix a flue reinforcement support tooling at the top surface of a steel structure column at the top of the heating furnace, wherein the top of the flue reinforcement support tooling is fixed to the outer wall of the flue, and a plurality of lifting ears are provided on the reinforcement support tooling;
  • Step 2 Hang one end of the hand chain hoist on the lifting ear of the flue reinforcement support tooling, and connect the other end of the hand chain hoist to the outer wall of the original flue baffle; connect the sling of the crane to the outer wall of the original flue baffle; the hand chain hoist and the crane cooperate to move the original flue baffle laterally out from the bottom of the flue, and then the crane delivers the original flue baffle to the ground, and the removal of the original flue baffle is completed;
  • Step 3 Use a crane to lift the new flue baffle to the installation height, connect the hand chain hoist to the outer wall of the new flue baffle, and use the hand chain hoist and the crane to install the new flue baffle into the bottom of the flue;
  • Step 4 Remove the flue reinforcement support tooling.
  • the flue reinforcement support tooling includes a plurality of support units, and the support unit includes a column and a horizontal support; the bottom of the column is fixedly connected to the top surface of the steel structure column at the top of the heating furnace, and the lifting lug is arranged on the top of the column; the horizontal support is fixed to the top of the column and the inner end of the horizontal support is connected to the outer wall of the flue.
  • the support unit further includes an oblique brace, one end of which is fixedly connected to the middle of the upper surface of the horizontal brace, and the other end of which is connected to the outer wall of the flue.
  • step one the supporting units are evenly distributed along the central circumference of the flue baffle on the top surface of the steel structure column at the top of the heating furnace.
  • step two first pull the hand winch to pull the original flue baffle horizontally toward the removal side.
  • the crane rope begins to lift the original flue baffle under force, and the hand winch at the rear continues to slowly move the original flue baffle out until the flue baffle is completely and safely moved out, and then the original flue baffle is sent to the ground by the crane.
  • step 2 after the original flue baffle is removed, the flue and the heating furnace outlet flange sealing surface are cleaned, and the fastening bolts are cleaned, checked, and lubricated.
  • step three when installing the new flue baffle, first pull the hand winch, and the crane cooperates to pull the new flue baffle in.
  • the crane releases the hook, and pulls the hand winch in different positions as needed to slowly pull the new flue baffle into place.
  • the sealing gasket is installed, the fastening bolts are installed, and the new flue damper is fastened with the bolts to complete the replacement.
  • the present invention adopts a flue reinforcement support tooling, and after the flue is reinforced and fixed, a hand winch is used in conjunction with a ground crane to replace the flue baffle, saving a large amount of time and machinery required for the installation and removal of the heating furnace flue and the flue baffle, reducing high-altitude lifting operations, ensuring the overall stability of the construction flue gas system, and ensuring the safety of the flue baffle replacement construction.
  • the flue reinforcement support tooling provided by the present invention can be used in a cyclical manner and is flexible to use. It can be reused in the replacement construction of flue baffles of the same diameter and equivalent weight.
  • FIG1 is a schematic diagram of a reinforcement support fixture fixed to the top surface of a steel structure column at the top of a heating furnace;
  • FIG2 is a schematic structural diagram of the supporting monomer of the present invention.
  • FIG3 is a schematic diagram of the original flue baffle when it is removed
  • FIG4 is a schematic diagram of the installation of a new flue damper
  • FIG. 5 is a schematic diagram of the new flue damper after installation.
  • 1-steel structure column on the top of the heating furnace 2-flue, 3-lifting ear, 4-support unit, 5-flue baffle, 6-hand winch, 7-lifting rope; 401-column, 402-horizontal support, 403-diagonal support, 404-guard plate connecting plate.
  • a typical embodiment of the present invention provides a construction method for replacing a flue baffle of a constant pressure reducing heating furnace.
  • the flue reinforcement support tooling is used. After the flue is reinforced and fixed, a hand winch is used in conjunction with a ground crane to replace the flue baffle.
  • the flue is not disassembled and assembled, but only the flue baffle is disassembled and assembled, thereby reducing the conditions for high-altitude lifting and achieving the purpose of safe and smooth replacement of the flue baffle.
  • a flue reinforcement support fixture is fixed on the top surface of the steel structure column 1 at the top of the heating furnace.
  • the top of the flue reinforcement support fixture is fixed to the outer wall of the flue 2 , and a plurality of lifting ears 3 are provided on the reinforcement support fixture.
  • the flue reinforcement support tooling is fixed on the top surface of the steel structure column 1 at the top of the heating furnace.
  • the flue reinforcement support tooling transmits the gravity of the flue 2 to the steel structure column 1 at the top of the heating furnace, thereby playing a supporting role.
  • the flue reinforcement support tooling includes a plurality of support units 4 , as shown in FIG. 2 , and the support units 4 include upright posts 401 and horizontal supports 402 .
  • the column 401 of the supporting unit is fixed on the top surface of the steel structure column at the top of the heating furnace and is fixedly connected by welding.
  • the column 401 forms a certain angle with the vertical direction.
  • the lifting lug 3 is arranged on the top of the column 401, and the lifting lug 3 is arranged perpendicular to the side of the column 401 and is welded and fixed on the column.
  • the lifting lug 3 is used to hang a hand chain hoist 6 to horizontally pull the flue baffle 5 to facilitate the removal and installation of the flue baffle.
  • the horizontal support 402 of the supporting unit 4 is fixed on the top of the column 401 and is welded to the column 401.
  • a guard plate connecting plate 404 is welded and fixed between the end surface of the horizontal support 402 and the flue 2.
  • the support unit 4 further includes an oblique brace 403 , one end of which is fixedly connected to the middle of the upper surface of the horizontal brace 402 , and the other end of which is connected to the outer wall of the flue 2 .
  • the oblique support 403 and the horizontal support 402 are at a certain angle, and a guard plate connecting plate 404 is also provided between the other end surface of the oblique support 403 and the flue 2 and fixed by welding.
  • the guard plate connecting plate 404 mentioned above is arc-shaped, and its inner diameter is consistent with the outer diameter of the flue barrel to ensure a tight fit and be welded and fixed.
  • the support units 4 are evenly distributed along the central circumference of the flue baffle 5 on the top surface of the steel structure column 1 at the top of the heating furnace.
  • the flue reinforcement support tooling acts on the flue 2 in multiple horizontal directions to prevent tipping, ensure the stability of the flue system, and ensure the safety of the flue baffle 5 replacement operation.
  • the size and quantity of the above-mentioned flue reinforcement support tooling are designed based on the maximum weight of the installed flue 2 and flue baffle 5, and the size includes the cross-sectional size and height of each component of the support unit 4 of the support reinforcement tooling.
  • the flue reinforcement support tooling is made of H-shaped steel.
  • Each support unit 4 is independently welded and fixed on the steel structure column 1 at the top of the heating furnace to ensure that the stress performance of the flue 2 meets the stress requirements when the flue baffle 5 is replaced.
  • the flue reinforcement support tooling is used to improve the overall stability of the flue, eliminate the need for high-altitude disassembly and assembly of the flue, reduce high-altitude lifting operations, and is simple to operate, ensuring the safety of construction workers during the operation.
  • a hand chain hoist 6 is hung on the lifting ear 3 of the support unit 4, and the other end of the hand chain hoist 6 is hung on the outer wall of the original flue baffle 5 through a wire rope, and all the mounting bolts on both sides of the original flue baffle 5 and the outlet flange of the heating furnace and the flue flange are removed.
  • the sling 7 of the crane is hung on the outer wall of the original flue baffle 5, and the sling is not subjected to force in the initial state.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)

Abstract

一种常减压加热炉烟道挡板更换施工方法，在加热炉顶部钢结构立柱（1）顶面位置固定烟道加固支撑工装，将手拉葫芦（6）一端系挂于所述烟道加固支撑工装的吊耳（3）上，另一端连接原烟道挡板（5）外壁，手拉葫芦和吊车配合将原烟道挡板从烟道（2）底部侧向移出，然后由吊车将原烟道挡板送至地面。由吊车将新烟道挡板吊至安装高度，将手拉葫芦与新烟道挡板外壁连接，由手拉葫芦和吊车配合将新烟道挡板安装进烟道底部。该常减压加热炉烟道挡板更换施工方法采用烟道加固支撑工装，对烟道加固固定后采用手拉葫芦与地面吊车配合进行烟道挡板更换，节省了加热炉烟道及烟道挡板安装和拆除所需大量的时间和机械，减少高空吊装作业，保证施工烟气系统整体稳定性，保障烟道挡板更换施工的安全。

Description

常减压加热炉烟道挡板更换施工方法 技术领域
本发明涉及炼油常减压装置加热炉检修技术领域，具体涉及一种常减压加热炉烟道挡板更换施工方法。
 背景技术
常减压装置常压炉和减压炉（以下统称加热炉）烟道挡板是常减压装置烟气系统重要的调节执行机构，良好的运行保障烟气出口压力的平稳，用以调节烟气阻力、负压,还可以控制火焰长度,从而达到控制温度均匀分布的目的。
加热炉烟道挡板所处环境恶劣，加热炉燃烧时,烟气中含有水蒸气、二氧化硫等酸性气体，容易在烟道挡板处凝结形成低温露点腐蚀；烟气中的灰份会沉积在烟道挡板上，增加转动阻力;烟气运行温度较高，会使烟道挡板形成高温氧化。常年运行后，烟气工况使烟道挡板不能正常转动，严重时甚至拖死失灵，失去调节功能。
常减压加热炉烟道挡板更换是常减压装置烟气系统检修重要的环节。常规更换烟道挡板的施工方法是用大型吊车将烟道及烟道挡板一起吊下，更换烟道挡板后，再将烟道及烟道挡板吊装就位，这样操作对于检修工程来讲，检修吊装工作量大，工期长，加大施工成本。
 发明内容
本发明要解决的技术问题是提供一种常减压加热炉烟道挡板更换施工方法，减少高空吊装条件下，实现烟道挡板安全、顺利更换目的。
为实现上述目的，本发明采用的技术方案是：
一种常减压加热炉烟道挡板更换施工方法，包括以下步骤：
步骤一，在加热炉顶部钢结构立柱顶面位置固定烟道加固支撑工装，所述烟道加固支撑工装的顶部与烟道外壁固定，加固支撑工装上设置有多个吊耳；
步骤二，将手拉葫芦一端系挂于所述烟道加固支撑工装的吊耳上，手拉葫芦另一端连接原烟道挡板外壁；将吊车的吊索连接原烟道挡板外壁；手拉葫芦和吊车配合将原烟道挡板从烟道底部侧向移出，然后由吊车将原烟道挡板送至地面，原烟道挡板拆除完成；
步骤三，由吊车将新烟道挡板吊至安装高度，将手拉葫芦与新烟道挡板外壁连接，由手拉葫芦和吊车配合将新烟道挡板安装进烟道底部；
步骤四，拆除烟道加固支撑工装。
进一步地，步骤一中，所述烟道加固支撑工装包括多个支撑单体，所述支撑单体包括立柱和水平撑；所述立柱底部与加热炉顶部钢结构立柱顶面固定连接，吊耳设置在立柱顶部；水平撑固定于立柱顶部且水平撑的内侧一端与烟道外壁连接。
进一步地，步骤一中，所述支撑单体中还包括斜撑，所述斜撑的一端固定连接于水平撑上表面中部，斜撑的另一端连接烟道外壁。
进一步地，步骤一中，所述支撑单体沿烟道挡板中心圆周均布设置在加热炉顶部钢结构立柱顶面。
进一步地，步骤二中，先拉动手拉葫芦向移出侧水平牵引原烟道挡板，原烟道挡板移出烟道有三分之一时，吊车吊索开始受力提起原烟道挡板，后部继续手拉葫芦缓慢送移出原烟道挡板，直至烟道挡板全部安全移出，然后由吊车将原烟道挡板送至地面。
进一步地，步骤二中，原烟道挡板拆除完成后，清理烟道及加热炉出口法兰密封面，紧固螺栓清洗检查、涂抹润滑油脂。
进一步地，步骤三中，新烟道挡板安装时，先拉动手拉葫芦，吊车配合新的烟道挡板拉入，当新烟道挡板移入烟道二分之一时，吊车松钩，根据需要拉动不同位置手拉葫芦将新烟道挡板慢慢牵入到位。
进一步地，新烟道挡板安装到位后，安装密封垫，安装紧固螺栓，螺栓紧固新的烟道挡板更换完成。
本发明采用烟道加固支撑工装，对烟道加固固定后采用手拉葫芦与地面吊车配合进行烟道挡板更换，节省了加热炉烟道及烟道挡板安装和拆除所需大量的时间和机械，减少高空吊装作业，保证施工烟气系统整体稳定性，保障烟道挡板更换施工的安全。
此外，本发明提供的烟道加固支撑工装可以周转使用，使用灵活，可重复使用于相同直径、相当重量的烟道挡板更换施工。 
 附图说明
此处的附图用来提供对本发明的进一步说明，构成本申请的一部分，本发明的示意性实施例及其说明用来解释本发明，并不构成对本发明的不当限定。
图1是加固支撑工装固定于加热炉顶部钢结构立柱顶面的示意图；
图2是本发明所述支撑单体的结构示意图；
图3是原烟道挡板拆除时的示意图；
图4是新烟道挡板安装时的示意图；
图5是新烟道挡板安装就位后的示意图。
图中，1-加热炉顶部钢结构立柱，2-烟道，3-吊耳，4-支撑单体，5-烟道挡板，6-手拉葫芦，7-吊索；401-立柱，402-水平撑，403-斜撑，404-护板连接板。
 具体实施方式
为了使本领域技术人员更好的理解本发明，以下结合参考附图并结合实施例对本发明作进一步清楚、完整的说明。需要说明的是，在不冲突的情况下，本申请中的实施方式及实施例中的特征可以相互组合。
本发明一种典型的实施方式提供的常减压加热炉烟道挡板更换施工方法，采用烟道加固支撑工装，对烟道加固固定后采用手拉葫芦与地面吊车配合进行烟道挡板更换，本实施方式不对烟道进行拆装，仅拆装烟道挡板，减少高空吊装条件下，实现烟道挡板安全、顺利更换目的。
首先，如图1所示，在加热炉顶部钢结构立柱1顶面位置固定烟道加固支撑工装，所述烟道加固支撑工装的顶部与烟道2外壁固定，加固支撑工装上设置有多个吊耳3。
烟道加固支撑工装固定在加热炉顶部钢结构立柱1顶面位置，通过烟道加固支撑工装将烟道2重力传递到加热炉顶部钢结构立柱1，起到支撑作用。
其中，所述的烟道加固支撑工装包括多个支撑单体4，如图2所示，所述支撑单体4包括立柱401和水平撑402。
所述支撑单体的立柱401固定在加热炉顶部钢结构立柱顶面位置，焊接固定连接，立柱401与竖直方向呈一定夹角。
吊耳3设置在立柱401顶部，吊耳3垂直于立柱401侧面设置，焊接固定在立柱上。吊耳3用于挂设手拉葫芦6，用以水平抽拉烟道挡板5便于烟道挡板拆除安装。
所述支撑单体4的水平撑402固定在立柱401顶部，与立柱401焊接连接。水平撑402端面与烟道2之间焊接固定护板连接板404。
优选的实施例中，所述支撑单体4中还包括斜撑403，所述斜撑403的一端固定连接于水平撑402上表面中部，斜撑403的另一端连接烟道2外壁。
斜撑403与水平撑402呈一定角度，斜撑403另一端面与烟道2之间同样设有护板连接板404，焊接固定。
以上所述护板连接板404呈弧形，内径与烟道筒体外径一致，确保贴合紧密，焊接固定。
在各连接部位单独设计接头形式，采用全焊缝焊接接头形式，焊缝高度≥最薄件高度，确保连接强度，使施工安全得到保障。
优选的实施例中，所述支撑单体4沿烟道挡板5中心圆周均布设置在加热炉顶部钢结构立柱1顶面，烟道加固支撑工装在水平多个方向对烟道2作用，起到防倾倒作用保证烟气系统的稳定性，保障烟道挡板5更换作业安全性。
以上所述烟道加固支撑工装的尺寸及数量以所安装的烟道2和烟道挡板5的最大重量为设计依据，所述尺寸包括所述支撑加固工装的支撑单体4各部件的截面尺寸、高度。
相对具体的实施例中，烟道加固支撑工装采用H型钢加工制作而成。每个支撑单体4独立焊接固定在加热炉顶部钢结构立柱1上，确保更换烟道挡板5时烟道2的受力性能满足受力要求。
利用烟道加固支撑工装，使烟道整体稳定性提高，省去烟道高空拆装作业，减少高处吊装作业，并且操作简单，保证作业过程施工人员的生命安全。
如图3所示，烟道加固支撑安装到位后，在所述支撑单体4的吊耳3上分别挂设一个手拉葫芦6，手拉葫芦6另一端通过钢丝绳系挂在原烟道挡板5的外壁上，拆除原烟道挡板5两侧与加热炉出口法兰、烟道法兰所有安装螺栓。将吊车的吊索7系挂在原烟道挡板5的外壁上，初始状态吊索不受力。
如图3所示，拉动手拉葫芦6向移出侧水平牵引原烟道挡板5，原烟道挡板5缓慢向移出侧移动，缓慢收钢丝绳配合原烟道挡板5拉出。原烟道挡板5移出烟道有三分之一时，吊车吊索7开始受力提起原烟道挡板5，后部继续手拉葫芦6缓慢送移出原烟道挡板5，直至全部安全移出，吊车吊索7承受原烟道挡板5全部重量，吊车安全转臂将原烟道挡板5送至地面，原烟道挡板5拆除完成。然后清理烟道及加热炉出口法兰密封面，紧固螺栓清洗检查、涂抹润滑油脂。
然后，如图4所示，将新烟道挡板5根据安装方位地面调整定位，按照四系提吊法将新的烟道挡板5吊至安装高度后，将支撑单体4上手拉葫芦钢丝绳系挂在新的烟道挡板5上，缓慢拉动手拉葫芦6，吊车缓慢放钢丝绳配合新的烟道挡板5拉入，新的烟道挡板5移入烟道2有二分之一时，吊车松钩，根据需要拉动不同位置手拉葫芦6将新的烟道挡板5慢慢牵入到位，安装密封垫，安装紧固螺栓，螺栓紧固新的烟道挡板更换完成（如图5所示）。
最后，根据需要，拆除烟道加固支撑工装的各支撑单体，便于下次烟道挡板更换周转使用。
本发明要求保护的范围不限于以上具体实施方式，对于本领域技术人员而言，本发明可以有多种变形和更改，凡在本发明的构思与原则之内所作的任何修改、改进和等同替换都应包含在本发明的保护范围之内。

Claims (8)

  1. 一种常减压加热炉烟道挡板更换施工方法，其特征在于，包括以下步骤：
    步骤一，在加热炉顶部钢结构立柱顶面位置固定烟道加固支撑工装，所述烟道加固支撑工装的顶部与烟道外壁固定，加固支撑工装上设置有多个吊耳；
    步骤二，将手拉葫芦一端系挂于所述烟道加固支撑工装的吊耳上，手拉葫芦另一端连接原烟道挡板外壁；将吊车的吊索连接原烟道挡板外壁；手拉葫芦和吊车配合将原烟道挡板从烟道底部侧向移出，然后由吊车将原烟道挡板送至地面，原烟道挡板拆除完成；
    步骤三，由吊车将新烟道挡板吊至安装高度，将手拉葫芦与新烟道挡板外壁连接，由手拉葫芦和吊车配合将新烟道挡板安装进烟道底部；
    步骤四，拆除烟道加固支撑工装。
  2. 根据权利要求1所述的常减压加热炉烟道挡板更换施工方法，其特征在于：步骤一中，所述烟道加固支撑工装包括多个支撑单体，所述支撑单体包括立柱和水平撑；所述立柱底部与加热炉顶部钢结构立柱顶面固定连接，吊耳设置在立柱顶部；水平撑固定于立柱顶部且水平撑的内侧一端与烟道外壁连接。
  3. 根据权利要求2所述的常减压加热炉烟道挡板更换施工方法，其特征在于：步骤一中，所述支撑单体中还包括斜撑，所述斜撑的一端固定连接于水平撑上表面中部，斜撑的另一端连接烟道外壁。
  4. 根据权利要求2或3所述的常减压加热炉烟道挡板更换施工方法，其特征在于：步骤一中，所述支撑单体沿烟道挡板中心圆周均布设置在加热炉顶部钢结构立柱顶面。
  5. 根据权利要求4所述的常减压加热炉烟道挡板更换施工方法，其特征在于：步骤二中，先拉动手拉葫芦向移出侧水平牵引原烟道挡板，原烟道挡板移出烟道有三分之一时，吊车吊索开始受力提起原烟道挡板，后部继续手拉葫芦缓慢送移出原烟道挡板，直至烟道挡板全部安全移出，然后由吊车将原烟道挡板送至地面。
  6. 根据权利要求5所述的常减压加热炉烟道挡板更换施工方法，其特征在于：步骤二中，原烟道挡板拆除完成后，清理烟道及加热炉出口法兰密封面，紧固螺栓清洗检查、涂抹润滑油脂。
  7. 根据权利要求1、5或6所述的常减压加热炉烟道挡板更换施工方法，其特征在于：步骤三中，新烟道挡板安装时，先拉动手拉葫芦，吊车配合新的烟道挡板拉入，当新烟道挡板移入烟道二分之一时，吊车松钩，根据需要拉动不同位置手拉葫芦将新烟道挡板慢慢牵入到位。
  8. 根据权利要求7所述的常减压加热炉烟道挡板更换施工方法，其特征在于：新烟道挡板安装到位后，安装密封垫，安装紧固螺栓，螺栓紧固新的烟道挡板更换完成。
PCT/CN2024/086877 2023-10-27 2024-04-09 常减压加热炉烟道挡板更换施工方法 Pending WO2025086560A1 (zh)

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