项目改造施工方案(中英文版) 2

糖厂1×45t/h CFB锅炉改造方案The Upgrade Project of 1×45 t/h CFB Boiler 一工程概况：

1. Project Overview

本项目为一台1×45t/h CFB锅炉改造，其主要工程项目为：更换二次风机，引风机；对锅炉二次风管部分管道进行改造，增加二次风管风门调节阀，送料风调节阀，密封风调节阀，圆形碳钢给料管改为方形不锈钢给料管，螺旋给料机检查门改为快开式；

This project is a renovation of 1 ×45t/h CFB boiler, and its main projects are as follows: to replace the secondary fan and induced-draft fan; to transform partial pipeline of boiler secondary air duct, to increase the throttle valve of secondary air duct, throttling valve of both the feeding airflow and the sealing airflow, to change the feeding pipe from round carbon-steel into square stainless and to change the inspection door of spiral feeder into quick-opening type.

100t/h大气热力式除氧器钢架与平台制作，安装一台100t/h大气热力式除氧器和一台Ø800连续排污器，增加锅筒连续排污装置；安装取样器4个，

Fabrication of steel frame of 100 t/h atmospheric thermal deaerator and its platform; installation of a 100t / h atmospheric thermal deaerator and a Ø800 continuous blowdown device; increase of continuous blowdown device for boiler drum; and installation of four samplers.

受煤斗加高700mm左右，安装振动给料机一台，更换破碎机一台，安装皮带秤一套。

Increase the height of coal-receiving hopper by around 700mm, install a set of vibrating feeder, change a set of crusher and install a set of belt scale.

锅炉电气控制系统：控制系统改为PLC控制；给水泵、一次风机、二次风机、引风机改为ABB 变频控制，增加部分控制电缆和桥架。

Electrical control system of boiler: change the control system to the PLC control; change feed pump, primary fan, secondary air fan, induced-draft fan to ABB variable frequency control, increase some control cable and cable tray.

二．施工方案

2. Construction Scheme

1).引风机更换，拆除原有引风机，利用原有引风机基础，新引风机轴承座和电机仍坐在一基础上，风机壳在原基础上焊接400mm高的钢支架固定，固定后为美观浇筑混凝土。根据风机安装高度和风机出口尺寸，做天园地方大小头与原风道连接。按风机安装技术要求精度找平找正。

1). Replace induced-draft fan and remove the previous induced-draft fan; the bearing block of new induced-draft fan and the motor are still on the same foundation, for which the original induced-draft fan foundation will be used; weld a 400mm-high steel bracket to fix the draught fan casing on the original foundation and cast concrete for aesthetic purpose. Fabricate the square and round connection reducer to connect with the original air duct according to the installation height of blower and the size of blower outlet. Make leveling and aligning, according to the required precision of technical requirements for installation of blower.

2).鼓风机更换，拆除原有引风机，风机基础拆除到风机机壳底座高度，保留原混凝土中钢筋。鼓风机轴承座框架制作的与风机机壳底座同高，在基础上用水钻开加强孔8个，孔DN100，深400，风机安装位置按风机出风口中心线确定。风机安装就位后将鼓风机轴承座框架与保留钢筋焊接再支模浇筑混凝土。按风机安装技术要求精度找平找正。

2) Replace air blower and remove the previous induced-draft fan; dismantle the blower foundation to the height of base of blower casing and retain the original reinforcement steel bars of concrete; fabricate the frame of bearing block of air blower and make it the base at the same height of blower casing and use high-pressure water jet to open eight reinforced holes on that foundation, with the hole of DN100 and the depth of 400. The installation position of blower should be determined by the centerline of the blower outlet. After the installation and positioning of the blower, weld the frame of bearing block of air blower and the reserved steel bars together, and then use formwork support to pour concrete. Make leveling and aligning according to the required precision of technical requirements for installation of blower.