水汽系统概况翻译-中英对照
一．水汽取样系统的组成：
为保证机组安全运行，本工程为每台机组分别设置了一套水汽集中取样分析装置以监测热力系统水汽品质。
水汽集中取样分析装置由高温高压架、仪表盘和恒温装置组成，采用两屏式，其中高温高压架为一个屏架，仪表盘和恒温装置组合在一个屏架上。
二．水汽系统各取样点及仪表分布：
凝结水泵出口： 电导率表、溶氧表、钠表、人工取样
除氧器出口： 溶氧表、人工取样
省煤器入口： pH表、电导率表、硅表、人工取样
炉水(左侧、右侧)： pH表、比电导率仪、人工取样
饱和蒸汽(左侧、中、右侧)： 电导率表、硅表、人工取样
过热蒸汽(左侧、右侧)： 电导率表、硅表、人工取样
再热蒸汽入口(左侧、右侧)： 人工取样
闭式循环冷却水： 人工取样
高压加热器疏水： 人工取样
低压加热器疏水： 人工取样
凝结水精处理出口： pH表、电导率表、人工取样
三．各取样点的参数：
序号 取样点 温度(℃) 压力(MPa)
1 凝结水泵出口 45 3.5
2 除氧器出口 181 0.925
3 省煤器入口 257 20.4
4 炉水（左侧、右侧） 365 20
5 饱和蒸汽(左侧、中、右侧) 365 20
6 过热蒸汽 548 18.4
7 再热蒸汽入口（左侧、右侧） 336 4.32
8 闭式循环冷却水 20 0.35
9 高压加热器疏水 218 3.35
10 低压加热器疏水 192 1.08
一．水汽质量标准：
● 炉水水质控制项目和标准：（PO43尽量控制在1.0―1.5ppm）
PH：9～10 PO43 ：0.5～3.0ppm SiO2≤250 PPb DD≤20us/cm
● 给水水质标准：
硬度:0umol/l 溶解氧≤7ppb PH :9.0～9.3 DD≤0.3us/cm
N2H4 ： 10～30ppb Fe3+ ≤20ppb Cu2+≤5ppb
● 蒸汽控制项目、标准：
SiO2≤20ppb Na+≤10ppb DD≤0.2us/cm
● 凝结水控制标准：
硬度<1umol/l 氢电导率≤0.3us/cm 溶解氧≤30ug/l
● 经精处理混床处理后水质标准：
硬度0 umol/l 电导率≤0.2us/cm 二氧化硅≤15ug/l 钠 5ug/l
铁≤8ug/l 铜≤3ug/l
第二节 水汽系统的加药系统
一．加药系统概况：
1．系统的功能：
化学加药系统包括给水及凝结水加氨系统，给水加联氨系统，炉水加磷酸盐系统，以控制水汽系统化学工况，防止系统结垢和腐蚀。氨加入凝结水处理的出口及除氧器下降管中维持给水PH值在合适的范围内以防止系统腐蚀；联氨加入除氧器下降管中以去除残余氧；磷酸盐直接加入锅炉汽包，提高炉水PH值和防止残余硬度在锅内沉积，以防止结垢和腐蚀。
2．系统的组成和作用：
● 给水、凝结水加氨系统：
氨钢瓶中液氨经蒸发定量注入到氨搅拌溶液箱，稀释到1－5%浓度后，再由氨加药泵送至凝结水处理的出口和除氧器出口下降管，氨的加入量以控制给水PH值在9.09.5范围内。
● 给水加联氨系统：
桶装联氨定量注入到联氨搅拌溶液箱中，稀释到0.1-0.3％浓度后，再用联氨加药泵加至除氧器下降管中，加入联氨以控制给水残余氧在一定范围内。
● 炉水加磷酸盐系统
固体粉末状磷酸盐在溶液箱内加水配制成5－8％浓度的磷酸盐，再由磷酸盐加药泵送至锅炉汽包，磷酸盐的加药量以控制炉水磷酸根含量0.5－3mg/l范围内。
3．系统的设备组成：
● 给水及凝结水加氨系统
两台机组共用一套加氨装置。加氨为两点加氨，即除氧器下降管和凝结水精处理出口。每套加氨装置由2台搅拌溶液箱、5台加药泵(4台运行，1台备用)以及系统管路、阀门、管件、表计等组成，每套加氨装置内所有设备、管道等全部固定在一个碳钢底盘上，并配备平台扶梯。系统内凡与溶液接触部分均应无铜件。
● 给水加联氨系统
两台机组共用一套加药装置。联氨的加入点为：除氧器下降管。每套加药装置由2台搅拌溶液箱、3台加药泵(2台运行，1台公共备用)以及辅助设备、管路、阀门、管件、表计等组成，每套加药装置内所有设备、管道等全部固定在一个碳钢底盘上，并配备平台扶梯。
II. Operation flow of desalinization system:
Filtration sea water -> Tubular mixer -> Multi- medium filter -> Activated charcoal filter -> Sea water hyperfiltration system -> First class fresh
water tank -> Second class hyperfiltration system -> Second class fresh water tank -> Mixes ion-exchange reactor -> Desalinization water tank ->
Desalinization water pump -> thermodynamic system of main building.
Section two Operation mode of system
This desalinization system equipment: Filtering processing includes more than 8 medium filter and 5 activated charcoal filters. Under the normal condition,
there are more than 8 medium filters and 5 activated charcoal filters may be operated at the same time; while a failure occurred in 1 unit or in a process
of back flushing, the output power the other equipment shall comply with the requirements of normal operation of the system. Under the normal condition, 2
sets of sea water hyperfiltration system and 2 sets of two sets of second hyperfiltration system may be operated at the same time; the output power of sea
water hyperfiltration system is about 128m3/h; the output power of second hyperfiltration system shall be 85 m3/h. Under the normal condition, two mixing
bed shall be arranged and one mixing shall be treated as backup unit in case of failure.
Section three Preparation before the operation of system
I. Inspection before the startup of system:
1. Inspection before the startup of desalinization system:
●Check whether the desalinization equipment system is switched on and whether the voltage is complied with the requirements.
●Check whether the water pump is complete and in a readiness condition; the water pump inlet gate shall be opened.
●Check whether the current meter and pressure gauge are complete; instruments cock shall be opened;
●Check whether the water levels of water tanks are above 2/3; the outlet passage shall be opened; the water quality shall be clean and comply with the
relevant requirements;
●Check whether the air supplies in air compressor are sufficient; the pressure of gas tank shall be 0.4MPa above.
●Drugs, measuring appliances and instruments of chemical examination shall be prepared and in a good condition;
●The opening and closing of the valves of desalinization system shall be flexible and reliable;
2. Inspection of dosing system:
1. Inspection of sodium hypochlorite dosing system:
●Inspection of the flow level of sodium hypochlorite storing tank;
●Inspect whether the sodium hypochlorite dosing pump is in a normal operation.
●Inspect whether the inlet and outlet channel of sodium hypochlorite dosing pump is opened;
2. Inspection of the flocculating agent system:
●Inspect whether the motor and dosing pump is in a normal operation.
●The watering feeding vent and discharging vent of solution tank shall be tightness; the inlet and outlet vent of dosing pump shall be open before
operation.
●Dissolve the dosing materials:
A. Open the watering supply vent of solution tank, add water to 4/5 and slowly pour proper amount coagulant into the unit.
Start the mixer for stirring.
B. Open the watering supply vent and add the water to a required height.
C. Stop stirring after 20 minutes; open the outlet vent to discharge the solution to the gauge tank.
武汉翻译公司
2013.7.25