CN209782779U - Heating system with heat supply network circulating pump driving configuration mode - Google Patents
Heating system with heat supply network circulating pump driving configuration mode Download PDFInfo
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- CN209782779U CN209782779U CN201920176600.1U CN201920176600U CN209782779U CN 209782779 U CN209782779 U CN 209782779U CN 201920176600 U CN201920176600 U CN 201920176600U CN 209782779 U CN209782779 U CN 209782779U
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- pressure turbine
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Abstract
the utility model provides a heating system with a heat supply network circulating pump driving configuration mode, which comprises a back pressure turbine, a heat supply network circulating pump and a generator which are coaxially arranged; the heat supply network circulating pump and the generator can be arranged on the same side or two sides of the back pressure turbine and are connected with the back pressure turbine through a reduction gearbox or a speed regulating device, and the back pressure turbine drags the generator and the heat supply network circulating pump to operate; when the heat supply network circulating pump and the generator are arranged on the same side, the generator can also be used as a motor to drive the heat supply network circulating pump. And the low-quality exhaust steam after the back pressure turbine applies work is discharged into a heat supply station for heat supply of a heat supply network. The utility model discloses a heating system, it utilizes the principle of energy cascade utilization, and the high-quality energy of the heating extraction steam of make full use of power plant both drags back pressure type little steam turbine to generate electricity, also can drive heat supply network circulating water pump, and the low-quality exhaust steam after the acting discharges into the heating station for heat supply network heat supply.
Description
Technical Field
The disclosure relates to the technical field of power plants, in particular to a heating system with a heat supply network circulating pump driving configuration mode.
Background
In the process of heating in a power plant, the general energy transfer flow is as follows: steam that the steam power plant boiler produced drives turbo generator set electricity generation, utilizes its heat of drawing steam or exhaust steam simultaneously, to heat supply network output heat, when drawing steam or exhaust steam parameter is higher, directly is used for the heat supply, will cause the not abundant problem of energy utilization inadequately.
in practical work, the inventor finds that in order to utilize the energy, the heat supply network circulating water pump is gradually changed into steam driving in recent years, and exhausted steam after driving is reused for heat supply, so that the gradient utilization of the capacity is realized. However, in some models, when the steam extraction parameter is as high as 1MPa and the energy available for driving is higher than the energy used by the heat supply network circulation system, an additional way needs to be considered to absorb the redundant high-quality energy.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects in the prior art, the embodiment of the disclosure provides a heating system in a heat supply network circulating pump driving configuration mode, so that reasonable utilization of energy is realized.
In order to achieve the purpose, the following technical scheme is adopted in the application:
In one embodiment, the heating system comprises a back pressure turbine running at a constant speed, a heat supply network circulating pump arranged on the same side, and a generator;
The back pressure turbine is connected to the generator through a reduction gearbox, the generator is connected to the heat supply network circulating pump through a speed regulating device, and the back pressure turbine drags the generator and the heat supply network circulating pump to operate;
And the low-quality exhaust steam after the back pressure turbine applies work is discharged into a heat supply station for heat supply of a heat supply network.
In a further technical scheme, in a starting stage, the generator can also be used as a motor to drive a heat supply network circulating pump to operate.
In a further technical scheme, the generator is an asynchronous motor generator.
According to the further technical scheme, part of heat supply extraction steam is output to the back pressure turbine to drag the small back pressure turbine to generate electricity, and part of heat supply extraction steam directly enters a heat supply station and is used for heat supply of a heat supply network.
In another embodiment, a heating system with a heat supply network circulating pump driving configuration mode is disclosed, which comprises a back pressure turbine running at a constant speed, and heat supply network circulating pumps and generators arranged on two sides;
One end of the back pressure turbine is connected to the heat supply network circulating pump through a speed regulating device, and the other end of the back pressure turbine is connected to the generator through a reduction gearbox;
and the low-quality exhaust steam after the back pressure turbine applies work is discharged into a heat supply station for heat supply of a heat supply network.
In a further technical scheme, the generator is an asynchronous motor generator.
According to the further technical scheme, part of heat supply extraction steam is output to the back pressure turbine to drag the small back pressure turbine to generate electricity, and part of heat supply extraction steam directly enters a heat supply station and is used for heat supply of a heat supply network.
In another embodiment, a heating system with a heat supply network circulating pump driving configuration mode is disclosed, which comprises a back pressure turbine operating at a variable speed according to the requirement of the heat supply network circulating pump, and a heat supply network circulating pump and a generator arranged on two sides;
one end of the back pressure turbine is connected to the heat supply network circulating pump, and the other end of the back pressure turbine is connected to the generator through the speed reducing/regulating device;
and the low-quality exhaust steam after the back pressure turbine applies work is discharged into a heat supply station for heat supply of a heat supply network.
In a further technical scheme, the generator is an asynchronous motor generator.
According to the further technical scheme, part of heat supply extraction steam is output to the back pressure turbine to drag the small back pressure turbine to generate electricity, and part of heat supply extraction steam directly enters a heat supply station and is used for heat supply of a heat supply network.
compared with the prior art, the beneficial effect of this disclosure is:
The utility model discloses a heating system, it utilizes the principle of energy cascade utilization, and the high-quality energy of the heating extraction steam of make full use of power plant both drags back pressure type little steam turbine to generate electricity, also can drive heat supply network circulating water pump, and the low-quality exhaust steam after the acting discharges into the heating station for heat supply network heat supply.
The heating and heat supply system can fully utilize high-quality energy of heat supply extraction steam, the extraction steam firstly enters the back pressure type steam turbine to do work, and exhaust steam after doing work is discharged into the heat exchange station for heat supply, so that the cascade utilization of energy is realized, and the efficiency of energy utilization is improved. The steam extraction drags the back pressure turbine to do work in a rotating way, and the output power is used for dragging the heat supply network circulating water pump to drive the heat supply network circulating water through the speed regulating or reducing device, and is used for dragging the asynchronous motor generator to generate electricity, so that the generated electricity can be used for service power and can also be output externally.
drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure and are not to limit the disclosure.
fig. 1 is a schematic structural diagram of a heating system configured in a heat supply network circulation pump driving manner according to a first embodiment of the disclosure;
Fig. 2 is a schematic structural diagram of a heating system in a heat supply network circulation pump driving configuration according to a second embodiment of the disclosure;
Fig. 3 is a schematic structural diagram of a heating system in a heat supply network circulation pump driving configuration according to a third embodiment of the present disclosure.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present disclosure. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The overall technical concept of the heating system adopting the heat supply network circulating pump driving configuration mode in the embodiment of the disclosure is as follows: by utilizing the principle of energy gradient utilization, the high-quality energy of the heating steam extraction of the power plant is fully utilized to drag a back pressure type small steam turbine to generate electricity and also drive a heat supply network circulating water pump, and low-quality exhaust steam after acting is discharged into a heat supply station for heat supply of the heat supply network.
The heating system can fully utilize high-quality energy of heat supply extraction steam, and the specific working process is as follows: the extracted steam firstly enters the back pressure type steam turbine to do work, and the exhaust steam after doing work is discharged into the heat exchange station to be used for heat supply, so that the cascade utilization of energy is realized, and the efficiency of energy utilization is improved. The steam extraction drags the back pressure turbine to do work in a rotating way, and the output power is used for dragging a heat supply network circulating water pump to drive heat supply network circulating water through a speed regulating or reducing device, and is used for dragging an asynchronous motor generator to generate electricity, so that the generated electricity can be used for power consumption of a factory or output externally.
according to the rotating speed of the back pressure turbine and the connection mode of the heat supply network circulating pump and the generator, the following three system settings can be provided, specifically three implementation modes.
In a first exemplary embodiment of the present disclosure, referring to fig. 1, a heating system with a heat supply network circulating pump driving configuration is provided, in which a steam turbine operates at a constant speed, and a heat supply network circulating pump and a generator are disposed on the same side.
Referring to fig. 1 again, the back pressure turbine operates at a constant speed to maintain the highest efficiency and to drive the generator and the heat supply network circulation pump to operate. In the starting stage, the asynchronous motor generator can also be used as a motor to drive a heat supply network circulating pump to operate.
In the embodiment, steam for heating is generated by steam extraction of a steam turbine, one part of the extracted steam directly enters a heat supply initial station to be directly utilized, the other part of the extracted steam with high-quality energy enters a back pressure steam turbine to do work, the back pressure steam turbine is connected with an asynchronous motor generator through a reduction gearbox, the asynchronous motor generator is connected to a heat supply network circulating pump through a speed regulation device, the back pressure steam turbine does work under the speed reduction effect of the reduction gearbox to drive the asynchronous motor generator to generate electricity, and the generated electric energy can be output externally and can also be used for power utilization of a factory.
exhaust steam generated by the back pressure turbine doing work is discharged into a first heat supply station, namely a heat supply initial station, and is used for supplying heat, so that the cascade utilization of energy is realized.
in a second exemplary embodiment of the present disclosure, referring to fig. 2, a heating system with a heat supply network circulation pump driving configuration is provided, in which a steam turbine operates at a constant speed, and a heat supply network circulation pump and a generator are disposed at both sides. The back pressure turbine operates at a constant speed, can keep the highest efficiency, and drags the generator and the heat supply network circulating pump to operate at the same time.
In the embodiment, the back pressure turbine applies work to drive the heat supply network circulating pump and the generator to work simultaneously, the back pressure turbine applies work to drive the asynchronous motor generator to generate electricity under the deceleration action of the reduction gearbox, the generated electric energy can be used for factory power, and meanwhile, the back pressure turbine applies work to drive the heat supply network circulating pump to work to drive the heat supply network circulating water.
Exhaust steam generated by the back pressure turbine doing work is discharged into a heat supply initial station for heat supply, and the cascade utilization of energy is realized.
In a third exemplary embodiment of the present disclosure, referring to fig. 3, the steam turbine operates at a variable speed, the back pressure steam turbine operates at a variable speed according to the requirement of the heat supply network circulating pump, and the other end drives the generator to generate power through the speed reduction and regulation device.
The difference between the second embodiment and the second embodiment is that the back pressure turbine operates at a variable speed according to the requirement of the heat supply network circulating pump, and the back pressure turbine operating at the variable speed drives the asynchronous generator to operate through the speed reduction/regulation device, in the second embodiment, the speed reduction/regulation device is a combination of a speed reduction box and a speed regulation device.
Exhaust steam generated by the back pressure turbine doing work is discharged into a heat supply initial station for heat supply, and the cascade utilization of energy is realized.
It is to be understood that throughout the description of the present specification, reference to the term "one embodiment", "another embodiment", "other embodiments", or "first through nth embodiments", etc., is intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, or materials described may be combined in any suitable manner in any one or more embodiments or examples.
The above description is only a preferred embodiment of the present disclosure and is not intended to limit the present disclosure, and various modifications and changes may be made to the present disclosure by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present disclosure should be included in the protection scope of the present disclosure.
Claims (7)
1. a heating system with a heat supply network circulating pump driving configuration mode is characterized by comprising a back pressure turbine running at a constant speed, a heat supply network circulating pump arranged on the same side and a generator;
the back pressure turbine is connected to the generator through a reduction gearbox, the generator is connected to the heat supply network circulating pump through a speed regulating device, and the back pressure turbine drags the generator and the heat supply network circulating pump to operate;
and the low-quality exhaust steam after the back pressure turbine applies work is discharged into a heat supply station for heat supply of a heat supply network.
2. The system of claim 1, wherein the generator is also operable as a motor to operate the heat-supply network circulation pump during startup.
3. The system of claim 1, wherein a portion of the extracted heat steam is output to the back pressure turbine to drive the back pressure turbine to generate electricity, and a portion of the extracted heat steam is directly input to the heat supply station for heat supply from the heat supply network.
4. A heating system with a heat supply network circulating pump driving configuration mode is characterized by comprising a back pressure turbine running at a constant speed, heat supply network circulating pumps arranged on two sides and a generator;
One end of the back pressure turbine is connected to the heat supply network circulating pump through a speed regulating device, and the other end of the back pressure turbine is connected to the generator through a reduction gearbox;
And the low-quality exhaust steam after the back pressure turbine applies work is discharged into a heat supply station for heat supply of a heat supply network.
5. The system of claim 4, wherein a portion of the extracted heat steam is output to the back pressure turbine to drive the back pressure turbine to generate electricity, and a portion of the extracted heat steam is directly input to the heat supply station for heat supply from the heat supply network.
6. a heating system with a heat supply network circulating pump driving configuration mode is characterized by comprising a back pressure steam turbine, a heat supply network circulating pump and a generator, wherein the back pressure steam turbine operates at a variable speed according to the requirement of the heat supply network circulating pump;
One end of the back pressure turbine is connected to the heat supply network circulating pump, and the other end of the back pressure turbine is connected to the generator through the speed reducing/regulating device;
And the low-quality exhaust steam after the back pressure turbine applies work is discharged into a heat supply station for heat supply of a heat supply network.
7. The system of claim 6, wherein a portion of the extracted heat steam is output to the back pressure turbine to drive the back pressure turbine to generate electricity, and a portion of the extracted heat steam is directly input to the heat supply station for heat supply from the heat supply network.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920176600.1U CN209782779U (en) | 2019-01-31 | 2019-01-31 | Heating system with heat supply network circulating pump driving configuration mode |
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| CN201920176600.1U CN209782779U (en) | 2019-01-31 | 2019-01-31 | Heating system with heat supply network circulating pump driving configuration mode |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111946412A (en) * | 2020-07-06 | 2020-11-17 | 东方电气集团东方汽轮机有限公司 | Back pressure type steam turbine system with heat regeneration system |
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- 2019-01-31 CN CN201920176600.1U patent/CN209782779U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111946412A (en) * | 2020-07-06 | 2020-11-17 | 东方电气集团东方汽轮机有限公司 | Back pressure type steam turbine system with heat regeneration system |
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