发布时间 : 星期四 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
8.B. Case of Freezing conditions (air ambient temperature < -3°C) 冰冻工况（大气温度 < -3°C ）
During hogging operation all steam isolating valves and corresponding condensate/air
take-off lines shall be fully open (Step 00).
建立真空运行期间所有的蒸汽隔离阀和相应的冷凝水/空气抽真空管道要完全打开（工序00）。
All vacuum units are activated and run until a pressure of preferably 6 kPa at
minimum on pressure transmitter 10MAG81/82 CP001/002/003 on main steam ducts is reached.
所有真空设备开动运行直到主蒸汽管道上的压力变送器10MAG81/82 CP001/002/003达到最低6kPa的适宜压力。
Before steam admission in the ACC, the condenser control system shall be placed in
Step 0 (? all steam isolating valves are closed) and valve 10MAJ83 AA301 shall be closed.
在蒸汽进入空冷凝汽器之前，冷凝器控制系统要设置在工序0（?所有蒸汽隔离阀关闭），阀门(10MAJ83 AA301)要关闭。
Once the plant is ready to supply steam and ACC in Step 0, steam is injected into the condenser via the turbine bypass valves.
一旦设备准备好供应蒸汽并且ACC设置在工序0，蒸汽通过汽机旁路阀注入冷凝器。
Stop one of the three vacuum pumps may be decided when air take-off temperature has sufficiently rise (see Note 1).
当抽出空气温度充分升高可决定停止3真空泵的其中1台（见注1）。这时,选择下一步保持运行的设备。
The automatic fan control is released starting in step 0 (all steam isolating valves closed and all fans OFF - See DES6403/6404).
启动工序0风机自动控制被解除（所有蒸汽隔离阀关闭且所有风机停止- 见DES6403/6404 ）。
The ACC is ready for turbine start-up. 空冷凝汽器汽机启动准备就绪。
Note: 注解:
RA 1) If the system has had a prolonged shutdown in which the vacuum was broken, steam injection
should start slowly, not exceeding 20% nominal steam flow until most air take-off temperatures 10MAJ91/92/93/94/95/96/97/98 CT351/352 are at least 10°C above ambient. This is to allow for complete air evacuation before increasing the heat load to the condenser. Indeed this uniform temperature proves that no air pockets (cold area) are still existing.
如果系统真空破坏导致关闭延迟，应稍慢注入蒸汽，蒸汽流量不超过额定流量的20％，直到大多数的抽出空气温度10MAJ91/92/93/94/95/96/97/98 CT351/352至少超过环境温度10°C以上。这是为了在增加冷凝器热负荷之前让全部空气排空。事实上，此同一温度证明没有气包（冷区）存在。
SPX Ref. Nr. : B26000284_DES6401_A
BEM Nr. D0013823 page 33 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
2)
Freezing weather start-up: 冰冻气候条件下的启动
During freezing weather, the condenser shall be brought to the minimum pressure before injection of steam, preferably 6kPa. The steam flow has to be increased as quickly as possible up to the defined minimum flow
在冰冻气候条件下，在注入蒸汽前冷凝器要实现最低6kPa更适宜的压力状态。蒸汽流必须尽可能快地增长到设定的最小流量。
Cold start is NOT allowed at ambient temperatures below -25°C (prelim.). In case start-up occurs at ambient temperature below -23°C an alarm shall be sent to the operator. 当环境温度低于-25°C(初步)时不允许冷启动。当环境温度低于-23°C启动时，系统会向操作工报警。
When an isolated street is opened, the speed of the running fan of bundles is slow down automatically in order to compensate the heat exchange surface increase.
当一个隔离列打开时，运行管束下的风机速度自动慢下来以补偿热交换表面增加。
If the system has had a prolonged shutdown with ambient temperature below -16°C during which no electrical power was available at all for the gearbox heater, a preheating period of maximum 6 hours (to be confirmed upon gearbox Manufacturer selection) is required in order to increase the oil temperature up to -16°C before starting the fan motor.
当齿轮箱加热器失去供电，系统在环境温度低于-16°C工况下延时停机时，预热时间要长达6小时(根据选择的齿轮箱制造商确认)，为的是在启动风机电机之前提升温度至-16°C。
3)
4)
4.2.
Shut down sequence停机顺序
1. The condensing capacity is reduced automatically (step switch) as the steam flow to the condenser decreases until all fans are stopped.
当去往冷凝器的蒸汽流减少时，冷凝能力自动降低（分步开关），直到所有风机停止。
2. Turbine is shut down and bypass opened. 汽机关闭旁路打开。
At shutdown, vacuum breaker (if any) shall be opened by signal from turbine control system. 在关闭时，真空断路器（如有）要由来自汽机控制系统的信号打开。
3. Bypass is closed. 旁路关闭。
4. The holding vacuum unit may be shut down. 保持真空设备关闭。
5. All Steam/Condensate/Air Take-Off shall be in open position ( ? Step 00 ) 所有蒸汽/冷凝水/空气抽空 要设在开的位置(?工序 00 )。
6. If a prolonged shutdown is foreseen where freezing is possible, the parts of the condensate system that can freeze have to be drained when the ambient temperature is already below zero or when subzero temperatures are expected. 如能预见到关闭延长而冰冻可能发生，当环境温度已经低于零度或当可预见有零度以下温度出现时，会发生冰冻的冷凝水系统部分必须排水。
We insist particularly on the draining of the vacuum system, the pumps and the cleaning system.
我们特别坚持真空系统、泵和清洗系统水排净。
SPX Ref. Nr. : B26000284_DES6401_A
BEM Nr. D0013823 page 34 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
7. Water seals are shut off when vacuum is reduced to zero. 当真空减到零时，水封关闭。 4.3.
Plant in standby condition备用状态的电厂
During standby, the condenser shall be held under vacuum at approx. 6 to 8 kPa by temporarily using a vacuum pump, depending upon the availability of steam to the turbine gland system. When high air leakage is supposed and minimum 1 times per week, the air ingress into the condenser shall be checked with the vacuum pumps stopped and isolated (see vacuum decay test, procedure PRO7706).
在备用期间，冷凝器要通过暂时使用一个真空泵而保持在压力约8kPa的真空状态下，这取决于是否有蒸汽进入汽机轴封系统。当将发生大量空气泄漏，并且每周至少一次，要在真空泵停止和隔离的情况下检查冷凝器的空气泄漏。（见真空衰减测试，程序PRO7706）。
SPX Ref. Nr. : B26000284_DES6401_A
BEM Nr. D0013823 page 35 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
5. 5.1.
OPERATION MODE (PRELIMINARY - 操作模式(初步)
AUTOMATIC MODE自动操作模式
The control system regulates: 控制系统调节： ?
The steam exhaust pressure by selecting the appropriate condensing step (see chap.6) taking into account the ambient temperature and freeze protection actions.
and the following protections are activated:
考虑到周围环境温度和防冻措施，并选择合适的冷凝步骤（见第六章）及下列保护项目，可以调节汽机背压。
? ? ? ? ?
? ? ? ? ?
5.2. RA
? 所有保护措施保持在运行状态。
? 当其他系统完全自动时，允许一台设备从控制室手动操作。 ? 任意特殊的冷凝步骤都可手动选择（步骤 00至14）。 ? 透平背压设定点可手动选择。 ? 如果周围环境温度在20°C以上，允许风机及风机电机在110% 额定转速下运转（55 Hz =超速模式）。
5.3.
MANUAL OPERATION FROM CONTROL ROOM来自控制间的手动操作 ? ? ? ? ?
All the protection actions remain active.
It is permitted to operate one equipment manually from the control room when the rest of the system is fully automatic.
Any specific condensing step can be selected manually (steps 00 to 14 sequentially) Turbine back pressure set-point can be selected manually.
It is allowed to release to run VFD/fan motors at 110% speed (55 Hz = boost operation mode) if the ambient air temperature is above 20°C. 蒸汽管线中的蒸汽压力（保护措施）。 蒸汽管线中的蒸汽温度 （保护措施）。 到真空泵的冷却流量（释放真空泵）。
风机系统的振动，油压和线圈温度（保护措施）。 透平机下部排气装置的液位（由他方）。
The steam pressure in the steam duct (protection action) The steam temperature in the steam duct (protection action)
Cooling flow to the vacuum pump system (to release vacuum pumps).
Vibration, oil pressure and wiring temperature on fan assemblies (protection action). Condensate level in exhaust device below turbine (By other)
LOCAL MODE就地模式
SPX Ref. Nr. : B26000284_DES6401_A
BEM Nr. D0013823 page 36 of 50