第一章 概述与通则
第一节 主机及化学系统概述
一．主机概况：
● 印尼中爪哇2×300MW燃煤电站项目为一滨海工程。电厂位于印尼中爪洼芝拉扎镇东北，南面紧邻印度洋。
● 三大主机分别由四川东方锅炉厂、东方汽轮机厂和东方电机厂制造。
● 电厂水源为紧邻的海水，采用海水直流循环系统，通过海水淡化提供电厂必须的淡水。
二．化学系统概述：
１． 为满足电厂用水需要，原水需进行净化处理。净化处理采用混凝、澄清和过滤工艺流程。
２． 补给水处理系统主要包括过滤系统、一级反渗透系统、二级混床，二台机组共用2X1000m3除盐水箱,三台除盐水泵。过滤系统包括双介质过滤器和活性炭过滤器，滤料分别为无烟煤、石英砂和活性炭，分别采用并联布置。反渗透装置采用并联布置，混床采用并联布置。
３． 凝结水精处理采用中压运行、体外再生系统。每台机组设2套高速混床（1运1备）；1、2号机组共用一套体外再生设备。精处理系统设有高速混床旁路系统，当进水超温或系统超压情况下，凝结水全部经旁路通过。
高速混床运行采用在线硅酸根分析仪、钠表、电导率仪及累计制水量控制运行失效终点。
４． 汽水加药及取样系统：芝拉扎电站机组热力系统的汽水品质监督采用水汽集中取样装置，整套装置包括降温减压架、取样仪表屏。高温、高压汽、水样经取样装置进行减温、减压和恒温，在线各类化学监督仪表跟踪检测各点数据并用记录仪及声光信号装置显示。
汽水加药系统采用加氨水、联胺、磷酸三钠处理方式。
Chapter One Overview and general principle
Section One Overview of main engine and chemistry system
I. Overview of main engine:
●Indonesia Java 2×300MW coal-fired power plant is a coastal area project. The power plant is located in northeast Cilacap town of central Java of Indonesia and close to Indian Ocean in south.
●Three major main engines are manufactured by Sichuan East Boiler Plant, East Steam Turbine Factory and East Electrical Machinery Plant respectively.
●The water source of power plant is supplied by the sea water nearby, which uses the direct circulation system of sea water and supplies the fresh water to power plant through the sea water desalination process.
II. Overview of chemistry system:
1. In order to fulfill the water supply of power plant, it is required to implement the purification process to the raw water. Purification processing applies coagulation, clarification and filtration technical process.
2. The water supply treatment system includes filtration system, the first class anti-penetration system and the second class mixing bed. These two units share 2X1000m3 desalinization water tank and three desalinization water pumps. Filtration system includes a double medium filter and an activated charcoal filter. The filter media includes anthracite, quartz sand and activated charcoal, which are arranged in parallel separately. The anti-penetration installment applies the parallel arrangement as well as the mixing bed.
3. Condensate polishing treatment applies medium pressure operation and external regeneration system. Each unit are arranged with 2 sets of mixing beds (1 for operation and 1 for backup in case of failure); the 1 and 2 units share the same set of external regeneration equipment. The polishing treatment system is equipped with high speed mixing bed by-path system. The condensing water shall pass through the bypass in case of feeding water overheated or system overpressure.
The operation of mixing bed applies on-line silicon dioxide analyzer, sodium analyzer, conductivity meter and integrating to control operation of failure end.
4. The steam-water dosing and sampling system: the steam-water quality supervision of the thermodynamic system of Java power plant unit applies the concentrated sampling device. The integral device includes a temperature and pressure relief frame and a sample measuring appliance panel. The high temperature and high pressure steam water sample shall be processed through temperature and pressure releasing procedures and maintain a constant temperature. The various online chemical supervision measuring appliance shall track the data of each checking points and displays in recording instrument and acousto-optics signal device.
The steam-water dosing system applies the three dosing procedures of ammonia solution, diammonium and trisodium phosphate.