CN104405612A - Boiler and feed pump system thereof - Google Patents
Boiler and feed pump system thereof Download PDFInfo
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- CN104405612A CN104405612A CN201410646010.2A CN201410646010A CN104405612A CN 104405612 A CN104405612 A CN 104405612A CN 201410646010 A CN201410646010 A CN 201410646010A CN 104405612 A CN104405612 A CN 104405612A
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Abstract
The invention discloses a feed pump system of a boiler and the boiler. The feed pump system of the boiler comprises a feed pump (2) and a feed pump motor (3), wherein the feed pump (2) is used for supplying water to the boiler (1), and the feed pump motor (3) is in power connection with the feed pump (2); the feed pump system of the boiler also comprises a frequency converter (4) connected with the feed pump motor (3). The feed pump system of the boiler has a remarkable energy-saving effect.
Description
Technical field
The present invention relates to steam generator system, particularly, relate to a kind of boiler and feed-water pump thereof.
Background technique
At present, thermal power generation unit boiler electrically driven feedpump is generally adopt fluid coupling to carry out speed governing, and feed water pump power consumption generally accounts for 2.5%-3.5% of generated energy and do not wait (there are differences because the operating modes such as the unit type of cooling, technical parameter, heat supply are different).Electrically driven feedpump is the Important Auxiliary equipment of steam turbine, also be the maximum load of power consumption, it directly affects the feed-water pump of boiler and even the energy consumption of whole power station, thus affects cost of electricity-generating, but, adopt fluid coupling to carry out speed governing and there is the defect that efficiency is low and energy dissipation is large.
Given this, be necessary the feed-water pump that a kind of novel boiler is provided, to overcome or to alleviate above-mentioned defect.
Summary of the invention
An object of the present invention is to provide a kind of feed-water pump of boiler, the feed-water pump energy-saving effect of this boiler is remarkable.
Another object of the present invention is to provide a kind of boiler, and this boiler uses the feed-water pump of boiler provided by the invention.
To achieve these goals, the invention provides a kind of feed-water pump of boiler, comprise for the feed water pump of boiler water supply and the water supply pump motor that is connected with described feed water pump power, wherein, the feed-water pump of described boiler also comprises the frequency variator being connected to described water supply pump motor.
Preferably, the front-mounted pump motor that the feed-water pump of described boiler also comprises front-mounted pump and is connected with described front-mounted pump power, the water outlet of described front-mounted pump is connected to the water intake of described feed water pump.
Preferably, described front-mounted pump motor is magneto.
Preferably, the feed-water pump of described boiler also comprises fluid coupling, by described fluid coupling, power is connected to described feed water pump to described water supply pump motor, the feed-water pump of described boiler at least can switch to the first mode of operation and the second mode of operation, wherein, in this first operative mode, described feed water pump regulates the rotating speed of described water supply pump motor by the described frequency variator of control and changes rotating speed, under described second mode of operation, described feed water pump changes rotating speed by regulating described fluid coupling.
Preferably, the feed-water pump of described boiler also comprises gear drive, and by described gear drive, power is connected to described fluid coupling to described water supply pump motor.
Preferably, described gear drive comprises the first gear and the second gear, described first gear is arranged on the first transmission shaft, described second gear is arranged on second driving shaft, and described first gear and described second gears meshing, described first transmission shaft is connected with described water supply pump motor power, and described second driving shaft is connected with described fluid coupling power.
Preferably, the feed-water pump of described boiler comprises at least three feed water pumps and at least three water supply pump motors corresponding with these at least three feed water pumps, few one of the quantity of water supply pump motor described in the number ratio of described frequency variator, wherein said water supply pump motor is connected with described converter circuit and carries out VFC for making two adjacent water supply pump motors can share a described frequency variator.
Preferably, described at least three water supply pump motors comprise the first water supply pump motor, second water supply pump motor and the 3rd water supply pump motor, described first water supply pump motor is connected with the one end of the second circuit being provided with the first frequency variator with one end of first line by the first diverter switch, described first water supply pump motor is connected with described first line or the second line electricity can be made optionally to switch to, described second water supply pump motor is connected to one end of the tertiary circuit with the first switch, and be connected with one end of described second circuit by the circuit with second switch, and be connected with the one end of the 4th circuit being provided with the second frequency variator by the circuit with the 3rd switch, described 3rd water supply pump motor is connected with one end of described 4th circuit and one end of the 5th circuit by the second diverter switch, optionally switch to so that described 3rd water supply pump motor can be made and be connected with described 4th circuit or the 5th line electricity, the other end of described first line and the other end of described second circuit are by having the connection of the 4th switch, the other end of described second circuit is also connected with the other end of described tertiary circuit by the circuit with the 5th switch, the other end of described tertiary circuit is also connected with the other end of described 4th circuit by the circuit with the 6th switch, the other end of described 4th circuit is also connected with the other end of described 5th circuit by the circuit with the 7th switch, the other end of described first line, the other end of described tertiary circuit and the other end of described 5th circuit are also connected to power supply buses respectively.
Preferably, the feed-water pump of described boiler comprise be arranged on described fluid coupling outside for providing the work oil pump for subsequent use of working oil and for providing the emergency bearing oil pump of lubricant oil to described fluid coupling to described fluid coupling.
Preferably, described work oil pump for subsequent use and emergency bearing oil pump drive respectively by respective magneto.
In addition, the present invention also provides a kind of boiler, and wherein, described boiler is by supplying water according to the feed-water pump of the boiler described in technique scheme.
Pass through technique scheme, because the feed-water pump of described boiler also comprises the frequency variator being connected to described water supply pump motor, namely the feed-water pump of this boiler can realize to feed water pump by frequency variator frequency control of motor speed, and frequency control of motor speed has higher speed efficiency relative to traditional hydraulic coupler-speed regulation, therefore the feed-water pump energy consumption of this boiler is lower, energy-saving effect is remarkable.
Other features and advantages of the present invention are described in detail in embodiment part subsequently.
Accompanying drawing explanation
Accompanying drawing is used to provide a further understanding of the present invention, and forms a part for specification, is used from explanation the present invention, but is not construed as limiting the invention with embodiment one below.In the accompanying drawings:
Fig. 1 is the schematic diagram of the feed-water pump of boiler according to the embodiment of the present invention.
Fig. 2 is the schematic diagram of the allocation plan of frequency variator in the feed-water pump of boiler according to the embodiment of the present invention.
Description of reference numerals
1 boiler 2 feed water pump
3 water supply pump motor 4 frequency variators
5 front-mounted pump 6 front-mounted pump motors
7 fluid coupling 8 first gears
9 second gear 10 first transmission shafts
11 second driving shaft 12 oxygen-eliminating devices
13 first line 14 second circuits
15 tertiary circuits 16 the 4th circuit
17 the 5th circuit 31 first water supply pump motors
32 second water supply pump motor 33 the 4th water supply pump motors
41 first frequency variator 42 second frequency variators
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.Should be understood that, embodiment described herein, only for instruction and explanation of the present invention, is not limited to the present invention.
See Fig. 1, according to an aspect of the present invention, provide a kind of feed-water pump of boiler, comprise for the feed water pump 2 supplied water to boiler 1 and the water supply pump motor 3 be connected with feed water pump 2 power, wherein, the feed-water pump of this boiler also comprises the frequency variator 4 being connected to water supply pump motor 3.
As mentioned above, feed-water pump due to boiler also comprises the frequency variator 4 being connected to water supply pump motor 3, namely the feed-water pump of this boiler can realize to feed water pump 3 by frequency variator 4 frequency control of motor speed, and frequency control of motor speed has higher speed efficiency relative to traditional hydraulic coupler-speed regulation, therefore the feed-water pump energy consumption of this boiler is lower, energy-saving effect is remarkable.
In addition, cavitation phenomenons is there is in order to prevent feed water pump 3, to improve the Safety performance of the feed-water pump of this boiler, the front-mounted pump motor 6 that the feed-water pump of boiler can also comprise front-mounted pump 5 and be connected with front-mounted pump 5 power, the water outlet of front-mounted pump 5 is connected to the water intake of feed water pump, that is, front-mounted pump 5 and feed water pump 3 are independently controlled by each self-corresponding motor respectively.In addition, front-mounted pump motor 6 is selected as magneto and make its constant speed run also can be certain energy-conserving action, but the present invention is not limited thereto, the motor type selecting other suitable is also fine.
Certainly, the feed-water pump of boiler can also comprise fluid coupling 7, by fluid coupling 7, power is connected to feed water pump 2 to water supply pump motor 3, the feed-water pump of boiler at least can switch to the first mode of operation and the second mode of operation, wherein, in a first operation mode, feed water pump 2 regulates the rotating speed of water supply pump motor 3 by controlling frequency variator 4 and changes rotating speed, in the second operation mode, feed water pump 2 changes rotating speed by regulating fluid coupling 7.Thus, when there is the situations such as frequency variator breaks down, can by the rotating speed regulating fluid coupling 7 to regulate feed water pump 2, this improves global reliability and the Security of the feed-water pump of this boiler undoubtedly.
It can also be seen that from Fig. 1, the feed-water pump of boiler can also comprise gear drive, and by gear drive, power is connected to fluid coupling 7 to water supply pump motor 3.Particularly, gear drive can comprise the first gear 8 and the second gear 9, first gear 8 is arranged on the first transmission shaft 10, second gear 9 is arranged on second driving shaft 11, and the first gear 8 engages with the second gear 9, first transmission shaft 10 is connected with water supply pump motor 3 power, and second driving shaft 11 is connected with fluid coupling 7 power.Be understandable that, when conditions permit, water supply pump motor 3 is also fine by other driving mechanisms and fluid coupling 7, and these schemes ought to be subject to protection of the present invention.
In the feed-water pump of the boiler according to the preferred embodiment of the present invention, at least three feed water pumps 2 and at least three water supply pump motors 3 corresponding with these at least three feed water pumps 2 can be comprised, few one of the quantity of the number ratio water supply pump motor 3 of frequency variator, wherein water supply pump motor is connected with converter circuit and carries out VFC for making two adjacent water supply pump motors 3 can share a frequency variator 4.Particularly, see Fig. 2, at least three water supply pump motors 3 can comprise the first water supply pump motor 31, second water supply pump motor 32 and the 3rd water supply pump motor 33, first water supply pump motor 31 is connected with the one end of the second circuit 14 being provided with the first frequency variator 41 with one end of first line 13 by the first diverter switch, optionally switch to so that the first water supply pump motor 31 can be made and be electrically connected with first line 13 or the second circuit 14, second water supply pump motor 32 is connected to one end of the tertiary circuit 15 with the first switch, and be connected with one end of the second circuit 14 by the circuit with second switch, and be connected with the one end of the 4th circuit 16 being provided with the second frequency variator 42 by the circuit with the 3rd switch, 3rd water supply pump motor 33 is connected with one end of the 4th circuit 16 and one end of the 5th circuit 17 by the second diverter switch, optionally switch to so that the 3rd water supply pump motor 33 can be made and be electrically connected with the 4th circuit 16 or the 5th circuit 17, the other end of first line 13 and the other end of the second circuit 14 are by having the connection of the 4th switch, the other end of the second circuit 14 is also connected with the other end of tertiary circuit 15 by the circuit with the 5th switch, the other end of tertiary circuit 15 is also connected with the other end of the 4th circuit 16 by the circuit with the 6th switch, the other end of the 4th circuit 16 is also connected with the other end of the 5th circuit 17 by the circuit with the 7th switch, the other end of first line 13, the other end of tertiary circuit 15 and the other end of the 5th circuit 17 are also connected to power supply buses respectively.Wherein, the first switch to the 7th switch can be single-pole single-throw switch (SPST), and the first diverter switch and the second diverter switch can be single-pole double-throw switch (SPDT), but the present invention is not limited to this, and other suitable switch form that can realize same function are also fine.
Improve the overall energy-saving effect of the feed-water pump of this boiler the configure of frequency AC Drive schemes tend of above-mentioned " two drag three ".
In addition, the feed-water pump of boiler can also comprise be arranged on fluid coupling 7 outside for give fluid coupling 7 provide the work oil pump (not shown) for subsequent use of working oil and for give fluid coupling 7 emergency bearing oil pump of lubricant oil (not shown) is provided.In order to reach energy-conservation object, work oil pump for subsequent use and emergency bearing oil pump can drive respectively by respective magneto (mentioned magneto above and had energy-conservation effect), and the present invention is not limited thereto.
According to another aspect of the present invention, also provide a kind of boiler, wherein, this boiler is by supplying water according to the feed-water pump of the boiler described in technique scheme.
Below the preferred embodiment of the present invention is described in detail by reference to the accompanying drawings; but; the present invention is not limited to the detail in above-mentioned mode of execution; within the scope of technical conceive of the present invention; can carry out multiple simple variant to technological scheme of the present invention, these simple variant all belong to protection scope of the present invention.
It should be noted that in addition, each the concrete technical characteristics described in above-mentioned embodiment, in reconcilable situation, can be combined by any suitable mode.In order to avoid unnecessary repetition, the present invention illustrates no longer separately to various possible compound mode.
In addition, also can carry out combination in any between various different mode of execution of the present invention, as long as it is without prejudice to thought of the present invention, it should be considered as content disclosed in this invention equally.
Claims (11)
1. the feed-water pump of a boiler, comprise for the feed water pump (2) supplied water to boiler (1) and the water supply pump motor (3) be connected with described feed water pump (2) power, it is characterized in that, the feed-water pump of described boiler also comprises the frequency variator (4) being connected to described water supply pump motor (3).
2. the feed-water pump of boiler according to claim 1, it is characterized in that, the front-mounted pump motor (6) that the feed-water pump of described boiler also comprises front-mounted pump (5) and is connected with described front-mounted pump (5) power, the water outlet of described front-mounted pump (5) is connected to the water intake of described feed water pump.
3. the feed-water pump of boiler according to claim 2, is characterized in that, described front-mounted pump motor (6) is magneto.
4. the feed-water pump of boiler according to claim 1, it is characterized in that, the feed-water pump of described boiler also comprises fluid coupling (7), by described fluid coupling (7), power is connected to described feed water pump (2) to described water supply pump motor (3), the feed-water pump of described boiler at least can switch to the first mode of operation and the second mode of operation, wherein, in this first operative mode, described feed water pump (2) regulates the rotating speed of described water supply pump motor (3) by controlling described frequency variator (4) and changes rotating speed, under described second mode of operation, described feed water pump (2) changes rotating speed by regulating described fluid coupling (7).
5. the feed-water pump of boiler according to claim 4, it is characterized in that, the feed-water pump of described boiler also comprises gear drive, and by described gear drive, power is connected to described fluid coupling (7) to described water supply pump motor (3).
6. the feed-water pump of boiler according to claim 5, it is characterized in that, described gear drive comprises the first gear (8) and the second gear (9), described first gear (8) is arranged on the first transmission shaft (10), described second gear (9) is arranged on second driving shaft (11), and described first gear (8) is engaged with described second gear (9), described first transmission shaft (10) is connected with described water supply pump motor (3) power, described second driving shaft (11) is connected with described fluid coupling (7) power.
7. the feed-water pump of boiler as claimed in any of claims 1 to 6, it is characterized in that, the feed-water pump of described boiler comprises at least three feed water pumps (2) and at least three water supply pump motors (3) corresponding with these at least three feed water pumps (2), few one of the quantity of water supply pump motor (3) described in the number ratio of described frequency variator, wherein said water supply pump motor is connected with described converter circuit and carries out VFC for making two adjacent water supply pump motors (3) can share a described frequency variator (4).
8. the feed-water pump of boiler according to claim 7, it is characterized in that, described at least three water supply pump motors (3) comprise the first water supply pump motor (31), second water supply pump motor (32) and the 3rd water supply pump motor (33), described first water supply pump motor (31) is connected with the one end of the second circuit (14) being provided with the first frequency variator (41) with one end of first line (13) by the first diverter switch, optionally switch to so that described first water supply pump motor (31) can be made and be electrically connected with described first line (13) or the second circuit (14), described second water supply pump motor (32) is connected to one end of the tertiary circuit (15) with the first switch, and be connected with one end of described second circuit (14) by the circuit with second switch, and be connected with the one end of the 4th circuit (16) being provided with the second frequency variator (42) by the circuit with the 3rd switch, described 3rd water supply pump motor (33) is connected with one end of described 4th circuit (16) and one end of the 5th circuit (17) by the second diverter switch, optionally switch to so that described 3rd water supply pump motor (33) can be made and be electrically connected with described 4th circuit (16) or the 5th circuit (17), the other end of described first line (13) and the other end of described second circuit (14) are by having the connection of the 4th switch, the other end of described second circuit (14) is also connected with the other end of described tertiary circuit (15) by the circuit with the 5th switch, the other end of described tertiary circuit (15) is also connected with the other end of described 4th circuit (16) by the circuit with the 6th switch, the other end of described 4th circuit (16) is also connected with the other end of described 5th circuit (17) by the circuit with the 7th switch, the other end of described first line (13), the other end of described tertiary circuit (15) and the other end of described 5th circuit (17) are also connected to power supply buses respectively.
9. the feed-water pump of boiler according to claim 4, it is characterized in that, the feed-water pump of described boiler comprise be arranged on described fluid coupling (7) outside for providing the work oil pump for subsequent use of working oil to described fluid coupling (7) and for providing the emergency bearing oil pump of lubricant oil to described fluid coupling (7).
10. the feed-water pump of boiler according to claim 9, is characterized in that, described work oil pump for subsequent use and emergency bearing oil pump drive respectively by respective magneto.
11. 1 kinds of boilers, is characterized in that, described boiler is supplied water by the feed-water pump of boiler as claimed in any of claims 1 to 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410646010.2A CN104405612A (en) | 2014-11-14 | 2014-11-14 | Boiler and feed pump system thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410646010.2A CN104405612A (en) | 2014-11-14 | 2014-11-14 | Boiler and feed pump system thereof |
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| CN104405612A true CN104405612A (en) | 2015-03-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410646010.2A Pending CN104405612A (en) | 2014-11-14 | 2014-11-14 | Boiler and feed pump system thereof |
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| CN (1) | CN104405612A (en) |
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| CN105114939A (en) * | 2015-04-29 | 2015-12-02 | 大唐桂冠合山发电有限公司 | Feedwater regulating system used for boiler in heat-engine plant |
| CN106150964A (en) * | 2016-08-25 | 2016-11-23 | 俞朝富 | The electrically driven feed pump system of electrically driven feed pump subsystem and composition thereof |
| CN110043439A (en) * | 2019-04-02 | 2019-07-23 | 南通常安能源有限公司 | A kind of steam feed pump system and method |
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Application publication date: 20150311 |