反冲洗设备技术规格翻译-中英对照
6）附属品
鼓形滤网供货时必须包括附属品有首次填充的润滑油。
所有的冲洗设备和管道系统应该遵循 RCC-M 等级3, 供应商应进行冲洗水系统的水锤分析。
每台机组都带有一个专门的冲洗水系统，系统包含以下部分：
1） 正常工况下的冲洗泵
冲洗泵为立式，4台低压冲洗水泵为核安全等级，单独设置，在SEC重要厂用水管道中取水；4台高压冲洗水泵为非核安全等级，设置于SEN泵坑，并从SEN水管中吸水。每台泵能为其相应的鼓形滤网提供足够冲洗水量。一台低压泵和一台高压泵为一泵组，低压泵正常使用，高压泵作为检修时备用。电动机能在泵的整个工作曲线范围内工作且不过载，并带有防潮加热器。泵室地面标高-13.75m*，吸水管为DN700，管中心标高-16.35m*。
2） 泵的参数
泵数量 16台（每台机8台）
流量 m3/h
扬程 m
水泵型式： 立式
3）管道系统：
管道系统把水从重要厂用水系统的接口送到冲洗泵的吸水法兰、从泵出水口通过一个共同的母管送到鼓形滤网的冲洗水管。供货商还需提供从鼓形滤网反冲洗过滤器出口接到排污水沟的管子。管道的材料为316L不锈钢。管子的长度和配件适合在现场焊接。泵、过滤器、阀门等和所有需要的联接处采用法兰连接。法兰和紧固件采用不锈钢，法兰满足ANSI B16.5-150标准。管道系统带有必需的垫片、不锈钢的支撑件和紧固件。
4）阀门：
4.1） 手动蝶阀
蝶阀为圆板式，碳素铸钢阀体，不锈钢阀板，可更换的粘接EPDM三元乙丙橡胶的、具有整体法兰密封的阀座。并带有缺口板和锁紧杆。
4.2） 止回阀
阀门为弹簧加载双圆盘，检查阀，不锈钢阀体、圆盘，托盘和氟橡胶密封座。
4.3） 手动球阀
阀门为承插焊接端，三片阀体。不锈钢阀体、球和阀杆，PTFE聚四氟乙烯阀座和密封。阀杆可锁闭。
4.4） 控制阀
为蝶阀圆板式，碳素铸钢阀体，不锈钢盘片，可更换的、粘接EPDM三元乙丙橡胶的、带整体密封法兰密封的阀座。带有手动脱扣辅助开关的具有四分之一转的电动执行器。
5）自动反冲洗过滤器
反冲洗过滤器安装在管道系统内，在反冲洗泵出口侧，用于过滤鼓形滤网冲洗水。过滤器利用系统中工艺流体的压力自动冲洗，不对水流产生影响。
运行时，水从过滤器进口进入，通过过滤组件，水中的污物被截流下来。反冲洗过程由控制箱内的循环计时器控制定时启动。但是在定时间隔中间当配置在控制盘内的压差开关收到超压差信号时，将会优先进行反清洗过程。电机启动后，旋转安有过滤组件的转台。同时反冲洗阀打开，当过滤组件转过冲洗管，被截留下来的污物就被反冲洗到排水沟中。所有电气组件都被连接到安装在过滤器上的控制箱中。
5.1）过滤器数据
过滤器数量 16个（每台机8个）
液体 海水
流量
滤网孔径
过滤水头损失（清洁时）
反冲洗前的压力损失:
5.2）工程的材料
本体 不锈钢 316L
轴和转盘 不锈钢 316L
反冲洗管 不锈钢 316L
过滤组件 不锈钢 316L
5.3）仪表
仪表直接安装在允许直接安装的地方，每个连接有一个单独的隔离阀进行隔离。当不能直接安装时，他们将被安装在一个镀锌碳钢支撑上，并通过不锈钢管与系统相连。
f） 水位差计控制设备技术规格
泵房前池（海水库）水位和鼓形滤网前后水位信号、水位差信号均为核安全3级。
1）格栅液位差控制盘
1.1） 数据
仪表盘数量 8只
仪表盘电源 380V交流/3相/50Hz
保护等级 IP65
安装 底座
制造 2mm厚钢板，焊接
仪表盘中包括两种不同类型的液位控制设备：一个压力式，一个超声波式。
6）Accessories
The delivery of drum-shaped filter screen must include accessory and lubricating oil for first filling.
e） Technical specification of backwashing equipment
All washing equipment and ductwork shall comply with RCC-M Grade 3, and the supplier shall perform water-hammer analysis on washing system.
Each unit has a special washing system which includes the following parts:
1） Rinsing pump in normal working condition
The rinsing pump adopts a vertical type, four low-pressure flushing water pumps are regarded as a key safety grade, which shall be set separately and intake water from SEC important water pipeline of plant; four high-pressure flushing water pumps is not the key safety grade which shall be set at SEN pump pit and intake water from SEN water pipeline. Each pump is able to provide adequate washing water quantity for corresponding drum-shaped filter screen. One low-pressure pump and a high-pressure pump form a unit and when the low-pressure pump is in the normal operation, the high-pressure pump is a standby for maintenance. The motor with moisture proof heater can work without overload in the whole range of working curve. The elevation of floor of pump room is -13.75m*，the suction pipe is DN700 and the elevation of pipe center is -16.35m*.
2） Parameters of pump
Quantity of pump 16 sets（8 sets for each machine）
Flux m3/h
Lift m
Type of water pump： Vertical
3）Ductwork：
The ductwork delivers water from the interface of an important water consuming system of plant to water-absorptive flange of washing pump, from outlet of pump to flushing pipe of drum-shaped filter screen through a common main steam pipe. The supplier shall provide pipes for connecting outlet of backwashing filter with drum-shaped filter screen and pollutant discharging drainage. The material of pipeline applies 316L stainless steel. The length of pipe and accessories shall be welded on site. All joints of pump, filter and valve are connected by flanges. The flange and fastener are made of stainless steel which shall comply with ANSI B16.5-150. The ductwork system must be matched with gaskets, stainless steel supporting parts and fasteners.
4）Valve:
4.1） Manual butterfly valve
The butterfly valve adopts round plate type with valve body of carbon cast steel and valve plate of stainless steel, replaceable EPDM as well as valve seat sealed with overall flange, being matched with a notched plate and a locking rod.
4.2） Check valve
The valve applies a spring added with double disc, check stainless steel valve body, disc, tray and seal housing of fluorine rubber.
4.3） Manual ball valve
The valve adopts a socket weld-end with three pieces of valve bodies with stainless steel valve body, ball and valve rod, PTFE valve seat and seal, and the valve rod is lockable.
4.4） Control valve
Round disc butterfly valve with valve body of carbon cast steel, stainless steel platter, replaceable EPDM as well as valve seat sealed with overall flange, being equipped with an electric actuator of quarter turn with manual tripping auxiliary switch.
5）Automatic backwashing filter
The backwashing filter is installed in ductwork on the outlet side of backwashing pump, which is used to filter washing water of drum-shaped filter screen. The filter performs automatic washing, utilizing pressure of process fluid in system without any influence on water flow.
During operation, water runs into the inlet from filter through the filter components and the dirt in water is stopped. The backwashing process starts by set time controlled by a cyclic timer in control box. However, when the pressure difference switch installed in control panel receives signal of excess pressure difference during timing interval, which will give priority to the backwashing process. After starting up the motor, it is necessary to rotate the rotary table being installed with filter modules. Meanwhile, backwashing valve opens, when filter modules rotates across the flushing pipe, the intercepted dirt will be backwashed into drainage. All electric components shall be connected to control box which is installed on the filter.
5.1) Filter data
Quantity of the filter 16 (8 for each unit)
Liquid Sea water
Flow
Aperture of the strainer
Filter head losses (In cleaning process)
The pressure loses before back flushing process:
5.2) Material of the project
Main body Stainless steel 316L
The axle and rotary plate Stainless steel 316L
Back flush pipeline Stainless steel 316L
Filter component Stainless steel 316L
5.3) Instrument
The instrument shall be directly installed in the place that is permitted, and each instrument shall be connected with a single segregation valve for isolation. When the direct installation is unavailable, these units shall be installed in one zinc-plated carbon steel supports, which is linked to the system mechanism through stainless steel.
f). Differential liquid level gauge controls the technical specification of the equipment
The water level signal and water level difference signal in front and back of drum shape strainer and the water level of the pool in front of the pump house (sea water pool) shall be 3 grades of nuclear safety.
1).Grid level difference control panel
1.1). Data
Quantity of instrument panel 8
Power of instrument panel 380V exchange/3 phases / 50Hz
Protection level IP65
Installation Base
Manufacture steel plate of 2mm; weld
The instrument panel includes two different types of level control equipment: a pressure type and an ultrasonic type.
2013.6.10