发布时间 : 星期一 文章空冷机组控制描述更新完毕开始阅读3e67942dbd64783e09122bcc
Contract Name Contract Number Document Title
: FUGU府谷 : B26000284
: FUNCTIONAL DESCRIPTION FOR AIR COOLED CONDENSER空冷凝汽器控制描述
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6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 1 separator tank level indicator 10MAJ0x CL501 1 heat exchanger 10MAJ0x AC001
2 temperature indicators 10MAJ0x CT501/502 on heat exchanger 1 pressure indicator 10MAJ0x CP502 on heat exchanger discharge
2 temperature indicators 10MAJ0x CT503/504 on heat exchanger cooling water 5 pump motor temperature element 10MAJ0x CT011/021/031/041/051 Swing check valves, drain valves and isolating valves 10MAJ0x AA461 1 make-up water valve 10MAJ0X AA861 1 Flow switch 10MAJ0X CF101
2 separator tank level switches 10MAJ0x CL201 and 10MAJ0x CL202
1. 1个在泵组入口的压力指示器10MAJ0x CP501 2. 2个在泵组入口的压力开关10MAJ0x CP201/202 3. 1个电动阀10MAJ0x AA901
4. 1个水环泵和驱动电机10MAJ0x AP001 5. 1个分离器水位罐 10MAJ0x BB001 6. 1个分离器水位指示器 10MAJ0x CL501 7. 1个热交换器 10MAJ0x AC001
8. 2个在热交换器上的温度指示器10MAJ0x CT501/502 9. 1个在热交换器排放上的压力指示器10MAJ0x CP502
10. 2个在热交换器冷却水上的温度指示器10MAJ0x CT503/504 11. 5个泵电机温度元件10MAJ0x CT011/021/031/041/051 12. 回转止回阀，排水阀和隔离阀10MAJ0x AA461 13. 1个补水阀10MAJ0x AA861 14. 1个流量开关10MAJ0x CF101
15．2个分离器储水罐水位开关10MAJ0x CL201 和 10MAJ0x CL202
SPX Ref. Nr. : B26000284_DES6401_A
BEM Nr. D0013823 page 21 of 50
Contract Name Contract Number Document Title
: FUGU府谷 : B26000284
: FUNCTIONAL DESCRIPTION FOR AIR COOLED CONDENSER空冷凝汽器控制描述
3.5.2
Instrumentation仪器
(SUBJECT TO EQUIPMENT SUPPLIER’S CONFIRMATION) （由设备供货商确认） Please refer to ―Instrumentation list per functional group‖ document [B26000284_DES6402 latest revision].
请参照文件B26000284_DES6402 latest revision按照功能组划分的仪表清单。
3.5.3
Philosophy原理
The vacuum system can be started when : - The cooling system is in operation - The vacuum pumps to be operated have been selected - The water level in the pump separators is sufficiently high (between minimum and
maximum level)
以下情况下能启动真空系统 - 冷却系统处于运行状态 - 选择了将运行的抽真空泵
- 泵分离器的水位足够高（介于最低和最高水位之间）
DESCRIPTION
A distinction should be made between the following modes of operation : ? A. Hogging operation (all 3 vacuum pumps operate parallel). ? B. Holding operation (one vacuum pump in operation). During certain operation
cases, 2 vacuum pumps shall operate simultaneously.
描述
以下不同运行模式应区别对待 ? A. 建立真空 (所有3台真空泵同时运行) 。 ? B. 保持运行 (一或二个真空泵运行) 。在特定运行情况下,，2 台真空泵要同时运行。
A. During Hogging, valve 10MAJ83 AA331 is open to facilitate complete air
removal in the installation. All steam/condensate/air extraction isolation valves are opened corresponding to step 00 (see DES6403 – Fan Control Step)
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When a suction pressure of about 8 kPa to 15 kPa (adjustable) is reached (on pressure transmitters 10MAG81/82 CP001/002/003) ? Hogging operation ends. ? Units are set to holding position (1 or 2 ON). ? Valve 10MAJ83 AA331 is closed ? In case of start-up in winter cold conditions, ACC streets have to be
isolated as required (steam, condensate and air extraction valves closed) before steam injection.
在建立真空时，阀门10MAJ83AA331打开便于装置中全部空气排走，所有的蒸汽/冷凝水/抽真空隔离阀按照步骤00的要求打开（见DES6403-风机控制步骤）
BEM Nr. D0013823
page 22 of 50
A.
SPX Ref. Nr. : B26000284_DES6401_A
Contract Name Contract Number Document Title
: FUGU府谷 : B26000284
: FUNCTIONAL DESCRIPTION FOR AIR COOLED CONDENSER空冷凝汽器控制描述
B.
当真空泵入口抽气压力达到8-15kPa（可调的）时，（在压力变送器上10MAG81/82 CP001/002/003） ? 在建立真空运行结束 ? 设备处于保持真空状态(2 或 1打开). ? 阀门10MAJ83 AA331 关闭 ? 如果冬季冷态启动，在蒸汽进入之前关闭所有蒸汽/冷凝水/抽真空隔离
阀，已完成对空冷管列的隔离
The package units are set to holding position by shutting down the stand-by vacuum pumps (2 out of 3 pumps).
The suction capacity can be improved by using 2 vacuum pumps simultaneously, under special conditions such as: - Low partial load / deep vacuum - Unexpected high air leakage.
-
B. 通过关闭备用真空泵（3个中选两个）将成套设备设置成保持运行状态。
在特殊情况下可以通过同时运行2台真空泵提高吸力，如： - 低局部 荷载/深度真空 - 未预料的大量空气泄露
SPX Ref. Nr. : B26000284_DES6401_A
BEM Nr. D0013823 page 23 of 50
Contract Name Contract Number Document Title
: FUGU府谷 : B26000284
: FUNCTIONAL DESCRIPTION FOR AIR COOLED CONDENSER空冷凝汽器控制描述
Note As a general rule (to be confirmed during commissioning), second vacuum holding pump shall be automatically put into operation when : or
- in case of freezing or
- when backpressure is lower than 13 kPA (adjustable) or
- when major temperature difference between exhaust steam and air extraction temperature
注意 通常规定（需在试运行期间确认），当发生下列情况时，第二台真空泵自动投入运行：
或
－结冰情况下 或
－汽机背压低于13KPA（可调） 或
－排放蒸汽和抽真空空气之间的温度差异过大
Valves (10MAJ07/08/09 AA901) must be opened after the vacuum pump for the appropriate package unit is started.
在适于成套设备的真空泵启动后，阀门(10MAJ07/08/09 AA901)必须打开。
Valves (10MAJ07/08/09 AA901) must be closed before the vacuum for the appropriate package unit is switched off.
在适于成套设备的真空泵关闭前，阀门(10MAJ07/08/09 AA901)必须关闭。
Check valve (10MAJ07/08/09 AA461) up-stream of the pump prevents air back flow from the package unit to the condenser while an interruption occur in operation and until the necessary suction pressure is reached.
泵上游的`止回阀(10MAJ07/08/09 AA461)用于在达到必要的抽气压力之前，防止运行受到干扰空气从成套设备逆流至冷凝器。
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The pressure switch (10MAJ07/08/09 CP201) located upstream the motorized valve 10MAJ07/08/09 AA901 the vacuum skid is used for controlling the standby pump(s) under pre-setted pressure (defined later by vacuum skid manufacturer).
位于真空泵组电动阀10MAJ07/08/09 AA901 上游的压力开关(10MAJ07/08/09 CP201) 设置有一个预定的压力（后由真空泵组制造商定义），用于控制备用泵。
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The pressure switch (10MAJ07/08/09 CP202) located downstream the motorized valve 10MAJ07/08/09 AA901 the vacuum skid inlet is used for opening the system inlet butterfly valve under pre-setted pressure (defined later by vacuum skid manufacturer).
BEM Nr. D0013823
page 24 of 50
SPX Ref. Nr. : B26000284_DES6401_A