Electric Feedwater Pump Set Operation Manual Shanghai Electric Power Construction General Factory Co., Ltd. Contents Chapter 1 Overview 11 Pump Set Type 12 General Description 13 Front Pump Description 14 Description of Feed Pump 25 Test Gauges 26 Technical Data 2 Chapter 2 Operating Instructions 41 Check Before Startup 42 Startup 43 General Inspection 44 Feed Pump Protection Thermal Shutdown 55 Shutdown 66 Troubleshooting 6 Chapter 3 Installation and Commissioning Instructions 81 Installation Instructions 82 Commissioning 9 Chapter 1 Overview 1 Pump Unit Type HPT200-320-5s + k Pump set, supporting the 600MW turbine generator 30% capacity pump or 300MW turbine 50% capacity, there are two types of steam pump and electric pump group.1.1 Electric pump group includes the front pump model: FA1D56A Feed pump Model: HPT200-320-5s + k (core import) Motor Model: YKS800-4 (Shanghai Electric Works Co., Ltd.) Coupler Model: R16K550.1 (import VOITH) 2 General Description Electric pump drive and The matching type is as follows: the front pump is directly driven by one end of the motor, the water pump is driven by the hydraulic coupling at the other end of the motor, and the two are connected by a laminated flexible coupling. Oil is lubricated by the fluid coupling System supply Each pump set is equipped with a front-mounted pump inlet strainer, feed pump inlet strainer, feed pump check valve and minimum flow recirculation system. The front pump, feed pump, motor and coupling are mounted on their respective Of the foundation, the foundation is fixed on a common concrete foundation.3 Description of the front pump 3.1 General The pump is horizontal, single-stage axial separation, with a shell near the centerline to allow axial and radial Free expansion to maintain neutrality. The pump is installed as a whole with a suitable drainage structure of the pump seat on the rigid structure .3.2 shell The shell is a high quality carbon steel castings, is a double volute type, horizontal center Line separation, import and export of water pipes in the lower half of the shell structure, so as to avoid the demolition of the connection pipe in the maintenance of the shell level of the sub-surface bonded with compressed asbestos paper Cypress pad in order to reduce the pressure load on the flange In combination with thermal shock deformation, the use of high-strength bolts, and the use of cylindrical cap nut in order to facilitate the use of the minimum pitch.Casing by a cast with its pump feet, supported in the box-type steel welded pump base, The mating face of the housing and pump base is close to the center of the shaft Line, and the key configuration to maintain vertical and horizontal centering and suitable for thermal expansion. The housing cover with exhaust valve .3.3 impeller impeller is double suction, stainless steel castings, processed to the exact mating tolerance and after the static Balanced, double-suction structure ensures that the impeller axial force is basically balanced, the free end is equipped with a bi-directional thrust bearing. Impeller is a key fixed on the shaft, the axial position is determined by the nuts at both ends of the wheel Yi Yi, which Kind of arrangement so that the impeller can be positioned on the centerline of the volute 3.4 stainless steel forgings, in addition to the stress state, quenching and tempering before roughing, heat treatment, cutting to a radial margin of 3mm, and then the shaft Placed in a vertical furnace in addition to stress, and then the final machining grinding .3.5 impeller seal ring to reduce leakage of the ring, installed in the housing cavity, positioned by anti-rotation positioning pin .3.6 bearing pump equipped with sliding bearings, bearings installed Firmly attached to the bearing bracket on the flange at the end of the pump housing Bearing lubricated with pressure oil and equipped with a cooling water chamber and a temperature measuring point 3.7 Shaft Seal The pump is fitted with a mechanical seal of balanced type, Spring supported ring and water cooled ring , The separate stuffing box has a water cooling jacket so that the temperature around the rotating part of the mechanical seal is lower.3.8 The laminated coupling between the coupling pump and the motor is a flexible and torsionally rigid metal Laminated structure .3.9 pump seat is a heavy duty solid steel box section structure .4 Description of the pump 4.1 General The pump is horizontal, centrifugal, multi-stage cylinder, the following two main components: (1) cylinder : Part of the main pressure boundary that forms part of the pump, welded to the pipe and centered on the pump seat of the structural steel structure. (2) Pump internal components: Can be withdrawn from the cylinder body as a whole, forming a pump with the cylinder body Main pressure boundary .5 Instrumentation The instrumentation supplied by our company is listed in the delivery schedule, which details the model, installation location, operating values, alarm and trip settings of each instrument.6 Technology Data 6.1 Front pump (according to the "Technical Agreement" parameter) Model FA1D56A Unit Efficiency Guaranteed point Maximum operating point Minimum pump inlet water temperature ℃ 125.3169.4169.4 Water inlet density kg / m3938.5897.9897.9 Water inlet pressure MPa0. 440.980.98 Traffic t / h688.6717.6167 Process m9691110 Necessary NPSH m4.284.43.1 Efficiency% 81.782.544.5 Shaft Power kW Speed ​​r / min1493 Weight kg23006.2 Feed Pump (According to "Technical Agreement" Parameter) Unit Efficiency Guaranteed Point Maximum Operating Point Single Pump Minimum Point inlet temperature ℃ 125.3169.4169.4 Inlet water density kg / m3938.5897.9897.9 Inlet pressure MPa1.321.781.95 Inlet flow t / h688.6717.6167 Outlet flow rate t / h606.6668.6167 Outlet pressure MPa8.0121.828.26 Tap flow t / h8249-tap pressure MPa49,70-supercharger flow t / h7443-supercharger pressure MPa8.823.8-head m turn-off point head m speed r / min NPSH (required) m38.944.725.8 efficiency% 7582.436 Shaft power kW1909.95506.43613
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