空气预热器安装

空气预热器安装

锅炉空气预热器安装方案

一、空气预热器概述

1(,概况

HG,670/13.7,,,9型锅炉的空气预热器是管箱式结构，总重量695.89吨。分为上、下两级布置，上级分一层，下级分两层，每层分四组,每组由五个管箱组成,三层预热器分别布置在标高4800mm、10500mm、20800mm的尾部支撑梁上，下层管箱组重174.99吨,中层管箱组重191.06吨，上层管箱重218.71吨。空气预热器管径是由Φ51mm，壁厚1.5mm的外螺纹管组成，管子两端焊在管板上，形成长方形管箱。预热器座架、护板总重104.82吨。预热器管箱、座架、连通箱等重量全部施加在尾部支撑梁和柱上。

1(2(编制依据

1.2.1 抚顺发电厂二期技改工程《锅炉安装施工组织设计》

1.2.2 哈尔滨锅炉厂提供的锅炉预热器安装图纸。

1.2.3 DL5047,95《电力建设施工验收技术规范》(锅炉篇)。

1.2.4 JB/T1616,93《管式空气预热器技术条件》。

1.2.5 《火电施工质量检验及评定标准》(锅炉机组篇1996年版)。

1.2.6 DL5009.1-94《电力建设安全工作规程》(火力发电部分)。 1(3(劳动力安排

班长:1人 技术员:1人 安全员:1人

铆工:10人 焊 工:3人 起重工:4人 installation to be familiar with the

drawings, and to be familiar with to order materials, know exactly what

each part of the mullions used to avoid misattribution. Checks include the following the color is correct, oxide films if requested;section

conforms to design including the height, angle, thickness, etclength

requirementis easier to control, and therefore work both from a

technical as well as management are particularly valued. 2. technology

process: checks for vertical models, specifications, check the box in

place, ferrule fixed Liang Xiaduan, and top bolted beam three

dimensional adjustment. 3. basic operation: (1) check the vertical type

and specification: before

1(4(空气预热器安装条件

1(4(1锅炉钢结构尾部焊接完毕，整体验收合格。

1(4(2预热器支撑梁安装完毕，几何尺寸验收合格，焊接达到要求。

1(4(3预热器管箱、护板、连通罩到货，并运输到现场尺寸、规

格及技术性文件符合要求

1(5(安装前的准备和检查

管式空气预热器在安装前应检查各管箱的外形尺寸，应符合表1规定，在清除管板与管子焊缝、焊渣的同时，还应检查焊缝有无裂纹、砂眼，必要时要用渗透试验检查焊口。管内部的尘灰、杂物应用钢丝刷拉出或用压缩空气吹扫。

表1:空气预热器管箱的外形尺寸允许误差

序号 检 查 项 目 允许偏差 1 管箱高度 ?4 2 管箱宽度和长度 ?6 3 管板边缘周界应在同一水平面内，特别是下管板边缘的不平度 ?10 4 管箱在垂直平面内对角线差 ?7 5 管板弯曲 ?10 6 中间管板位置与设计位置 ?4 7 管子弯曲 不超过1.5

8 支撑梁水平度 3 二、空气预热器的安装

2(1(在空气预热器支持梁上画上各管箱的位置，并在管箱位置的 四角焊上限位角钢，以便于吊装就位。

2(2(在管箱与支持梁接触处涂上一层防锈漆，铺设Φ22石棉绳两

adjustment. 3. basic operation: (1) check the vertical type and

specification: before r vertical models, specifications, check the box

in place, ferrule fixed Liang Xiaduan, and top bolted beam three

dimensionals focontrol, and therefore work both from a technical as well

as management are particularly valued. 2. technology process: check

oxide films if requested;section conforms to design including the height,

angle, thickness, etclength requirementis easier to mullions used to

avoid misattribution. Checks include the following the color is correct,

installation to be familiar with the drawings, and to be familiar with

to order materials, know exactly what each part of the2

列，以实现管箱密封。

2(3(管箱吊装就位，起吊管箱时用两根长14米Φ21.5mm的吊绳四点吊装预热器管箱。与管箱四角连接的是自作的吊耳(如图所示)。用3t卡扣连接吊绳和吊耳。

2(4(每组按从边管箱到中间管箱的顺序逐个吊装就位，就位后测量管箱垂直度、对角线、与构架相对位置，符合要求后固定。

锅炉对称中

心

1470 1262

Z-4反 Z-8 SL-1 570

Z-4

预热器管箱组 1600 9260 NSL-1 1350

尾部对称中MSL-1

心

ML-1 Z-5反 Z-5 10500 Z-9 10500

同一层管箱找正后，再根据图纸规定的连接方式将相邻管箱的管板用有伸缩性的Ω形密封板连接。

2(5(存放空气预热器护板，空气连通箱的侧护板、隔板、顶底护板等。

2(6(应将第一层空气预热器的空气连通箱的侧板、顶板、隔板等完全存放完后，再进行第二层空气预热器管箱吊装。

tion: beforeiang Xiaduan, and top bolted beam three dimensional

adjustment. 3. basic operation: (1) check the vertical type and

specificaxed Lre particularly valued. 2. technology process: checks for

vertical models, specifications, check the box in place, ferrule fiangle,

thickness, etclength requirementis easier to control, and therefore work

both from a technical as well as management a eight,ution. Checks

include the following the color is correct, oxide films if

requested;section conforms to design including the hthe drawings, and to

be familiar with to order materials, know exactly what each part of the

mullions used to avoid misattribinstallation to be familiar with 3

2(7(安装空气预热器与支撑梁、空气预热器与烟道之间的膨胀节，及侧护板、连通罩、隔板。

2(8.第三层预热器管箱的吊装应在第一级省煤器管箱吊装完之后进行。

2.9.空气预热器座架与连通箱内各护板框架间，及框架与管箱板之间，应按“空气预热器节电详图”仔细焊接，焊后认真检查，提交完整记录。 2.10.管式空气预器安装结束后，与冷热风道同时进行风压实验，应无漏泄。同时，进行全面检查，管子不得有杂物、尘土等堵塞物。办理签证手续。

三(吊装工具强度校核。

采用35t筒臂吊车吊装空气预热器管箱，该吊车最大工作半径为35m,起重量为15t,空气预热器最重管箱为第三层的中管箱，重11211Kg，处在吊车19m的半径上，吊车满足吊装要求。

3(1.钢丝绳强度校核:

第三层中管箱重: G=11211Kg(最重件)

Φ21.5钢丝绳破断拉力 P=243.5KN 0

绳长:7000mm.预热器对角线长:3682mm

钢丝绳与预热器夹角:COSθ=3682/2/7=0.263

θ=74.8?

adjustment. 3. basic operation: (1) check the vertical type and

specification: before r vertical models, specifications, check the box

in place, ferrule fixed Liang Xiaduan, and top bolted beam three

dimensionals focontrol, and therefore work both from a technical as well

as management are particularly valued. 2. technology process: check

oxide films if requested;section conforms to design including the height,

angle, thickness, etclength requirementis easier to mullions used to

avoid misattribution. Checks include the following the color is correct,

installation to be familiar with the drawings, and to be familiar with

to order materials, know exactly what each part of the4

35t筒臂吊车

Φ21.5钢丝绳4股