CN206962740U - A kind of wiring system of desulphurization system slurry circulating pump - Google Patents
A kind of wiring system of desulphurization system slurry circulating pump Download PDFInfo
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- CN206962740U CN206962740U CN201720793569.7U CN201720793569U CN206962740U CN 206962740 U CN206962740 U CN 206962740U CN 201720793569 U CN201720793569 U CN 201720793569U CN 206962740 U CN206962740 U CN 206962740U
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- Prior art keywords
- circulating pump
- slurry circulating
- synchronous motor
- frequency
- feeder line
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Abstract
The utility model provides a kind of wiring system of desulphurization system slurry circulating pump, including a feeder line, the feeder line is connected to high voltage bus, it is connected with a fuse or a vacuum circuit breaker, a contactor, a current transformer, a high voltage converter and the permagnetic synchronous motor for slurry circulating pump in turn on the feeder line, the high voltage converter adjusts the permagnetic synchronous motor rotating speed by frequency conversion, to adjust the power of slurry circulating pump.Slurry circulating pump energy consumption is reduced by high-pressure frequency-conversion regulation, and permagnetic synchronous motor is more more energy efficient than common asynchronous moter on the basis of frequency control, further reduces the power consumption of slurry circulating pump, saves the energy, it is simple for structure.
Description
Technical field
It the utility model is related to a kind of mode of connection of desulphurization system, and in particular to a kind of desulphurization system slurry circulating pump
Wiring system.
Background technology
It is all high from 6kV (10kV) using vacuum circuit breaker or F+C circuit connections mode at present in heat-engine plant desulfurized system
Pressure station service electrical system is directly powered to serum recycle pump motor, specifically has two kinds of modes of connection, as shown in Figure 1A, Figure 1B, from height
The wiring of bus 8 is pressed, first passes around a fuse 1 or vacuum circuit breaker 5, then passes through the summation current transformer 3 of contactor 2 successively, most
Zhongdao reaches the common asynchronous moter 4 of slurry circulating pump.
Because the power consumption of slurry circulating pump accounts for 70% or so of desulphurization system, the electricity of the power consumption of slurry circulating pump in desulphurization system
Accounting in consumption is larger.Using Figure 1A, Figure 1B connection type, in the case where boiler load adjusts, it is only capable of starching by adjusting
The quantity of liquid circulating pump carries out coarse adjustment, to reach desulfurization discharge standard.The flow of desulphurization system slurry circulating pump is with unit
Operating load, Gas Parameters change and change, be only applicable to unit to adjust by opening and closing the quantity of circulating pump and bear
The situation that lotus changes greatly.This adjustment means limitation is larger, during adjustment, easily occurs causing to circulate when closing pump
Amount is inadequate, phenomena such as causing the surplus of serum recycle amount larger when opening pump, so as in this running, it is impossible to realize essence
Fine control, there is larger operating cost and waste.Moreover, when being run between actual operating mode is in adjustment section, it may appear that
Slurry circulating pump is contributed more than the situation of flow needed for desulfurization, but the wherein slurry circulating pump that can not stop transport completely, because
And the operation for a slurry circulating pump having more necessarily causes energy waste.
In addition, the multiphase converter in power system mainly includes rectifier, inverter and converter plant, major loop leads to
Often without the neutral conductor, it is the maximum harmonic source of quantity.Positive sequence and negative sequence harmonic current in rotary electric machine, are formed respectively
Forward and reverse rotating excitation field, electric rotating machine is set to produce the oscillatory torque of fixed number and the mechanical periodicity of rotating speed, so that motor
Efficiency reduces, heating increase.For the rotor of synchronous motor, positive sequence and negative sequence harmonic current are respectively induced out again.Due to collecting skin
Effect, its major part are not to be flowed in rotor windings, but form circulation in rotor surface, cause obvious local hair
Heat, shorten its service life.
Utility model content
In view of the above-mentioned problems, the utility model provides a kind of wiring system of desulphurization system slurry circulating pump, followed to slurries
Ring pump configures frequency converter, using permagnetic synchronous motor, changes the rotating speed of pump by adjusting slurry circulating pump electric machine frequency, realizes
The power of slurry circulating pump is adjusted, so as to reduce the power consumption of slurry circulating pump；In addition, become using harmonic suppression apparatus to reduce
Harmonic current caused by frequency device, suppress kelvin effect.
In order to solve the above technical problems, the utility model adopts the following technical scheme that：
A kind of wiring system of desulphurization system slurry circulating pump, including a feeder line, the feeder line is connected to high voltage bus, at this
Be connected with turn on feeder line a fuse or a vacuum circuit breaker, a contactor, a current transformer, a high voltage converter and
For a permagnetic synchronous motor of slurry circulating pump, the high voltage converter is adjusted the permagnetic synchronous motor by frequency conversion and turned
Speed, to adjust the power of slurry circulating pump.Slurry circulating pump energy consumption, and permanent magnet synchronous electric are reduced by high-pressure frequency-conversion regulation
Machine is more more energy efficient than common asynchronous moter on the basis of frequency control, further reduces the power consumption of slurry circulating pump, saves the energy, this
Wiring system is simple for structure.
Further, the voltage of the high voltage bus of this wiring system connection is 6kV or 10kV, suitable for accessing under the voltage
Slurry circulating pump.
Further, the electric machine frequency of the permagnetic synchronous motor is adjustable to 46~50Hz, and the scope can make absorption tower
Spraying layer nozzle inlet slurry pressure is higher than 0.6bar, ensures that jet expansion slurries particle diameter is no more than 2500 μm, it is ensured that desulfurization system
Reach the effect of energy-conservation in the case of system normal operation.
Further, this wiring system connects a harmonic suppression apparatus by a control loop, is produced for reducing frequency conversion
Harmonic current, suppress kelvin effect caused by circulation heating.
Further, because the high voltage converter has some energy consumptions in itself, delivery efficiency is not 100%, is mostly
More than 95%, therefore the rated power of high voltage converter should match with the permagnetic synchronous motor, can select same power or work(
Rate is more slightly higher than the permagnetic synchronous motor.
Brief description of the drawings
Figure 1A and Figure 1B is the existing wiring schematic diagram of slurry circulating pump.
Fig. 2A and Fig. 2 B are the wiring system structural representations of the slurry circulating pump of embodiment.
In figure：1- fuses, 2- contactors, 3- current transformers, 4- common asynchronous moters, 5- vacuum circuit breakers, 6- are high
Voltage frequency changer, 7- permagnetic synchronous motors, 8- high voltage bus.
Embodiment
To enable features described above and advantage of the present utility model to become apparent, special embodiment below, and appended by cooperation
Figure is described in detail below.
The present embodiment discloses a kind of wiring system of desulphurization system slurry circulating pump, as shown in Fig. 2A, Fig. 2 B, from 6kV or
A feeder line is connect on 10kV high voltage bus 8, the feeder line first passes through a fuse 1 or a vacuum circuit breaker 5, then in turn through one
The current transformer 3 of contactor 2 and one, then by a high voltage converter 6, finally it is connected to the permanent-magnet synchronous for slurry circulating pump
Motor 7.In addition, the wiring system also connects a harmonic suppression apparatus (not shown) by a control loop, for reducing frequency conversion
Harmonic current caused by device, suppress circulation heating caused by kelvin effect.
The pressure range of operation that spraying layer nozzle allows in desulphurization system absorption tower is 0.6~0.8bar, corresponding nozzle
Outlet slurry particle size range is 2200~2500 μm.To ensure the performance requirement of nozzle, during operation, if nozzle inlet slurries pressure
Less than 0.6bar, then particle diameter will not be able to ensure desulphurization system normal operation to the requirement less than 2500 μm.Therefore, ensureing to take off
On the premise of sulphur system nozzle outlet slurry particle diameter is no more than 2500 μm, then require that nozzle inlet slurry pressure is higher than 0.6bar,
For this slurry circulating pump electric machine frequency adjusting range must be made to be 46~50Hz, therefore slurry circulating pump can be made by this wiring system
Electric machine frequency is adjusted to 46~50Hz, ensures desulphurization system normal operation.Because the cube of power and frequency is proportional,
It therefore follows that slurry circulating pump can reach the effect of energy-conservation using frequency control.
Application example is as follows：
In certain 630MW power plant, unit load is at 67.72%, actual entry SO2Concentration is 3042.63mg/Nm3, spray
Mouth design pressure is 0.8Bar, and slurry circulating pump rated lift is 30mLc, according to serum recycle pump frequency converting speed regulating model is calculated
Enclose for 4Hz.Using this wiring system to slurry circulating pump frequency modulation, in the case of power frequency operation, practical measurement of current 64.67A, motor is real
Border power is 571.24kW；In converting operation, when running frequency is in 45Hz or so, the average current value of operation 5 days is
39.46A, now motor actual power is 390kW；Power of motor is under converting operation operating mode than reducing under power frequency operation operating mode
181.24kW, i.e., economize on electricity 181.24kWh per hour.
Such as will high voltage converter frequency consider by 45Hz, can be drawn in theory according to rotating speed and frequency relation under frequency conversion
Power is 416.43kW, calculated value of the power of motor under converting operation operating mode than power frequency operation operating mode under measured value reduce
154.81kW, i.e., economize on electricity 154.81kWh per hour.
By above-mentioned field measurement and theoretical calculation, theoretical section hourly under slurry circulating pump converting operation operating mode
The relatively low 26.43kWh of electricity ratio field measurement value, two values are very close to it follows that in practical application and in theory can
The power consumption for using this wiring system to reduce slurry circulating pump is proved, reaches the purpose of energy-conservation.
From the foregoing, can be according to the lift of desulphurization system slurry circulating pump, nozzle exit pressure etc. by this wiring system
Parameter request, the frequency of slurry circulating pump is fine-tuned, unit load can be applied to and change less situation, can be prevented
Only occur slurry circulating pump output more than the situation of flow needed for desulfurization and caused by energy waste.
Claims (5)
1. a kind of wiring system of desulphurization system slurry circulating pump, it is characterised in that including a feeder line, the feeder line is connected to high pressure
Bus, it is connected with a fuse or a vacuum circuit breaker, a contactor, a current transformer, a high pressure in turn on the feeder line
Frequency converter and the permagnetic synchronous motor for slurry circulating pump, the high voltage converter adjust the permanent magnetism by frequency conversion
Synchronous motor rotating speed, to adjust the power of slurry circulating pump.
A kind of 2. wiring system of desulphurization system slurry circulating pump according to claim 1, it is characterised in that the high pressure
The voltage of bus is 6kV or 10kV.
A kind of 3. wiring system of desulphurization system slurry circulating pump according to claim 1, it is characterised in that the permanent magnetism
The electric machine frequency of synchronous motor is adjustable to 46 ~ 50Hz.
4. the wiring system of a kind of desulphurization system slurry circulating pump according to claim 1, it is characterised in that pass through a control
Loop processed connects a harmonic suppression apparatus.
A kind of 5. wiring system of desulphurization system slurry circulating pump according to claim 1, it is characterised in that the high pressure
The rated power of frequency converter is equal to or higher than the rated power of the permagnetic synchronous motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720793569.7U CN206962740U (en) | 2017-07-03 | 2017-07-03 | A kind of wiring system of desulphurization system slurry circulating pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720793569.7U CN206962740U (en) | 2017-07-03 | 2017-07-03 | A kind of wiring system of desulphurization system slurry circulating pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206962740U true CN206962740U (en) | 2018-02-02 |
Family
ID=61382940
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720793569.7U Expired - Fee Related CN206962740U (en) | 2017-07-03 | 2017-07-03 | A kind of wiring system of desulphurization system slurry circulating pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206962740U (en) |
-
2017
- 2017-07-03 CN CN201720793569.7U patent/CN206962740U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180202 |