CN216429691U - High-efficient turbo electric power generation system of degree of depth peak regulation that unipolar was arranged - Google Patents
High-efficient turbo electric power generation system of degree of depth peak regulation that unipolar was arranged Download PDFInfo
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- CN216429691U CN216429691U CN202122731724.1U CN202122731724U CN216429691U CN 216429691 U CN216429691 U CN 216429691U CN 202122731724 U CN202122731724 U CN 202122731724U CN 216429691 U CN216429691 U CN 216429691U
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Abstract
The utility model belongs to the technical field of thermal energy power generation, a high-efficient turbo generator system of degree of depth peak regulation that unipolar was arranged is related to, including the boiler, be connected and the steam turbine unit of operation with the boiler, the steam turbine unit includes the steam turbine high pressure jar, with first passageway, second passageway and the generator that the steam turbine high pressure jar coaxial was arranged, boiler steam sends into the steam turbine high pressure jar, and the steam turbine high pressure jar exhausts and gets into the boiler and send into first passageway and second passageway respectively after reheating, first passageway and second passageway exhaust all are connected with the condenser, and are equipped with the straight condensing regulator valve between boiler and the second passageway. The utility model is suitable for a single reheat or double reheat unit, through setting up one set of high pressure cylinder, two sets of intermediate pressure jar and low pressure jar to divide into main and auxiliary passage, avoided complicated main steam and reheat steam flow distribution and parameter matching problem; under the low-load working condition, the heat efficiency and the stability of heat supply parameters under the low-load working condition can be conveniently adjusted and cut off.
Description
Technical Field
The utility model belongs to the technical field of heat energy power generation, concretely relates to high-efficient turbo electric power generation system of degree of depth peak regulation that unipolar was arranged.
Background
A thermal power plant, referred to as a thermal power plant, is a plant that produces electric energy using a combustible (e.g., coal) as a fuel. The basic production process is as follows: when the fuel is burnt, water is heated to generate steam, chemical energy of the fuel is converted into heat energy, the steam pressure pushes a steam turbine to rotate, the heat energy is converted into mechanical energy, and then the steam turbine drives a generator to rotate, so that the mechanical energy is converted into electric energy.
Most of the existing common coal-fired generating sets adopt a one-furnace one-machine design, and in order to meet the requirement of deep peak regulation, an imaginable idea is that a one-furnace one-machine unit design scheme is mature, and the biggest problems exist are that the utilization hours of the coal-fired generating sets are reduced, the efficiency is low when the coal-fired generating sets are operated by frequently adopting low-load peak regulation, and the coal consumption is high. In addition, according to the operating characteristics of the main engine, the through flow of the steam turbine needs to be maintained and the sliding pressure operation is adopted, steam extraction parameters of the high-pressure cylinder and the medium-pressure cylinder are greatly reduced under the low-load working condition, when heat is supplied to the outside, the steam extraction parameters need to be led out from a steam extraction port with higher parameters, and temperature and pressure reduction treatment needs to be carried out under the high-load working condition, so that throttling loss is caused.
When one furnace is used for matching two turbo generator units, theoretically, one unit can be cut off to operate under the low-load working condition. In fact, the following two problems are difficult to solve: (1) if the two steam turbine generator units operate by adopting different parameters, the exhausted steam of the high-pressure cylinder needs to be sent into a boiler as a cold section for reheating and heating, and the operation cannot be performed due to pressure mismatch, so that the technical problem is difficult to solve; (2) if the two turbo generator units operate with the same parameters, the two turbo generator units are adjusted simultaneously under a low-load working condition, and contradict with the operation of one turbo generator unit and the stop of the operation of one turbo generator unit under a preset low-load working condition, and when one turbo generator unit is suddenly closed under a certain load, the pressure can fluctuate greatly; meanwhile, if one unit is turned off, the other unit needs to perform a boosting process. When the closed steam turbine generator unit is started, the steam discharge parameters of the two turbine generator units are different due to different steam flows, and the two turbine generator units are difficult to match with boiler parameters.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the defect and not enough that exist among the prior art, a reliable and stable of design reduces the throttle loss, improves the high-efficient turbine power generation system of degree of depth peak regulation that operating efficiency's unipolar was arranged.
In order to achieve the above object, the utility model adopts the following technical scheme: the utility model provides a high-efficient turbine power generation system of degree of depth peak regulation that unipolar was arranged, includes the boiler, is connected and the steam turbine unit of operation with the boiler, the steam turbine unit includes the steam turbine high pressure jar, with first passageway, second passageway and the generator that the steam turbine high pressure jar coaxial was arranged, the steam turbine high pressure jar is sent into to boiler steam, and the steam turbine high pressure jar is exhausted to get into the boiler and sends into first passageway and second passageway respectively after reheating, first passageway and second passageway exhaust all are connected with the condenser, and are equipped with the straight condensing regulator valve between boiler and the second passageway.
Preferably, the high-pressure cylinder of the steam turbine comprises a high-pressure cylinder and/or an ultrahigh-pressure cylinder.
Preferably, the first channel comprises a first intermediate pressure cylinder and a first low pressure cylinder, the first intermediate pressure cylinder receives the boiler reheat steam and exhausts the boiler reheat steam to the first low pressure cylinder, and the first low pressure cylinder exhausts the boiler reheat steam to the condenser.
Preferably, the second channel comprises a second intermediate pressure cylinder and a second low pressure cylinder, the second intermediate pressure cylinder receives the boiler reheat steam and exhausts the boiler reheat steam to the second low pressure cylinder, and the second low pressure cylinder exhausts the boiler reheat steam to the condenser.
Preferably, the valve of the straight condensing regulator is arranged between the boiler and the second intermediate pressure cylinder.
Preferably, the high-pressure cylinder of the steam turbine and the first channel are both provided with steam extraction ports.
Preferably, the condenser is connected with the boiler through a condensate pump and a feed water regenerative system.
Preferably, a main throttle valve is arranged between the boiler and the high-pressure cylinder of the steam turbine.
After the technical scheme is adopted, the utility model provides a pair of high-efficient turbo electric power generation system of degree of depth peak regulation that unipolar was arranged has following beneficial effect:
the utility model has the advantages that by arranging a set of ultra-high pressure cylinder (if any) and high pressure cylinder, the exhaust steam is sent into the boiler for reheating, thereby avoiding the distribution problem of main steam and reheat steam flow of the reheating unit; the method comprises the steps that a first channel and a second channel are arranged, a main channel and an auxiliary channel are formed through two sets of intermediate pressure cylinders and low pressure cylinders, and the intermediate pressure cylinders and the low pressure cylinders of the first channel (the main channel) are guaranteed to operate in a high-flow, high-parameter and high-efficiency state under a low-load working condition; the second channel (secondary channel) serves as a regulating function and can be switched off (keeping the minimum throughflow cooling steam quantity) when the load is further reduced to about 60%; the efficiency is maximized and the stability of the pressure of the steam extraction port is kept by the operation and matching adjustment of the intermediate pressure cylinder and the low pressure cylinder of the main channel and the auxiliary channel.
When the unit operates under the condition of 60% -100% load, the intermediate pressure cylinder and the low pressure cylinder of the main channel are kept to operate under the full load working condition, so that the efficiency is improved; the auxiliary channel adjusts an adjusting valve on an inlet pipeline of the auxiliary channel according to the load, and the flow rate is adjusted within the range of 0-100% of the load; under the normal low-load operation condition of the unit, the weighted average of the efficiency of the two units is higher than that of the conventional unit.
When the unit operates under 20% -60% load, the flow-through steam of the intermediate pressure cylinder and the low pressure cylinder of the auxiliary channel is reduced to the minimum cooling steam flow, most of the steam operates through the main channel, the flow-through capacity of the intermediate pressure cylinder and the low pressure cylinder of the main channel is improved by nearly one time compared with that of the conventional unit, and the efficiency is greatly improved.
When the unit has external heat supply, all external steam supply is extracted from the high-pressure cylinder, the main channel intermediate pressure cylinder and the low-pressure cylinder or is exhausted and connected.
The utility model discloses well ultra-high pressure jar (if have) and the intermediate pressure jar of high-pressure jar, major-minor passageway with low pressure jar, the coaxial arrangement of generating set, keep the generator to be qualified for the next round of competitions still for one set, it is not big to the electric wire netting dispatch influence.
Drawings
FIG. 1 is a schematic flow diagram of a deep peaking turbine power generation system with a single shaft arrangement according to the present invention;
fig. 2 is another schematic flow diagram of the deep peak shaving high-efficiency steam turbine power generation system with single shaft arrangement.
Wherein: the system comprises a boiler 1, a generator 2, a condenser 3, a pure condensing regulator valve 4, a high-pressure cylinder 5, a first intermediate pressure cylinder 6, a first low-pressure cylinder 7, a second intermediate pressure cylinder 8, a second low-pressure cylinder 9, a condensate pump 10, a water supply regenerative system 11 and a main throttle valve 12.
Detailed Description
The present invention will now be described more fully hereinafter with reference to the accompanying drawings, in which some, but not all embodiments of the invention are shown. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
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 application. 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.
Unless specifically stated otherwise, the relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the orientation words such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" etc. are usually based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplification of description, and in the case of not making a contrary explanation, these orientation words do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore, should not be interpreted as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.
Spatially relative terms, such as "above … …," "above … …," "above … … surface," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and if not stated otherwise, the terms have no special meaning, and therefore, the scope of the present invention should not be construed as being limited.
The utility model relates to a high-efficient turbo generator system of degree of depth peak regulation of unipolar arrangement, as shown in figure 1 or figure 2, including boiler 1, the turbine unit that is connected with boiler 1 and moves, the turbine unit includes the turbine high pressure cylinder (once reheat ultra supercritical unit high pressure cylinder, twice reheat unit ultra high pressure cylinder and high pressure cylinder), with the coaxial first passageway, the second passageway and the generator 2 of arranging of turbine high pressure cylinder, boiler 1 steam is sent into the turbine high pressure cylinder, and turbine high pressure cylinder exhaust gets into boiler 1 after reheating respectively sends into first passageway and second passageway, first passageway and second passageway exhaust all are connected with condenser 3, first passageway includes first intermediate pressure cylinder 6 and first low pressure cylinder 7, first intermediate pressure cylinder 6 receives boiler 1 reheat steam and exhaust and gets into first low pressure cylinder 7, first low pressure cylinder 7 exhaust gets into condenser 3, the second channel comprises a second intermediate pressure cylinder 8 and a second low pressure cylinder 9, the second intermediate pressure cylinder 8 receives the reheat steam of the boiler 1 and exhausts the reheat steam to enter the second low pressure cylinder 9, and the second low pressure cylinder 9 exhausts the reheat steam to enter the condenser 3.
The high-pressure cylinder of the steam turbine comprises a high-pressure cylinder 5 and/or an ultrahigh-pressure cylinder (if any), a set of high-pressure cylinder is arranged, the set of high-pressure cylinder is arranged according to 100% of capacity, a first intermediate-pressure cylinder 6 and a first low-pressure cylinder 7 of the first channel, and a second intermediate-pressure cylinder 8 and a second low-pressure cylinder 9 of the second channel are respectively arranged, namely two sets of intermediate-pressure cylinders and two sets of low-pressure cylinders are respectively arranged according to 2 to 50% of capacity, one set (the first channel) is used as a main channel, the other set (the second channel) is used as an auxiliary channel, the high-pressure cylinder 5, the first intermediate-pressure cylinder 6 and the first low-pressure cylinder 7 are provided with steam extraction ports, all extracted steam and externally supplied heat steam are led from the high-pressure cylinder, the main channel intermediate-pressure cylinder and the low-pressure cylinder, and are adjusted according to meet the maximum flow, and are kept to operate at high load and high efficiency; a straight condensing regulator valve 4 is arranged between the boiler 1 and the second channel, namely the straight condensing regulator valve 4 is arranged between the boiler 1 and the second intermediate pressure cylinder 8, and a steam extraction port is not arranged, so that the second channel only operates under a straight condensing working condition and is used for regulating load, the straight condensing regulator valve can be regulated along with the reduction of the load, and when the load is reduced, the main channel is ensured to operate under a rated through-flow working condition by regulating the flow of the middle-pressure cylinder and the low-pressure cylinder of the auxiliary channel; when the load of the unit is further reduced (about 60% of load or less), the operation of the low-pressure cylinder and the middle-pressure cylinder in the auxiliary channel can be cut off, so that the through-flow steam quantity of the low-pressure cylinder and the middle-pressure cylinder in the main channel is ensured, and the efficiency of the unit under the low-load working condition is improved. In addition, all steam extraction including external heat supply is completely extracted from the high-pressure cylinder and the middle-low pressure cylinder of the main channel, so that the stability of external steam parameters is ensured, and throttling loss is reduced, thereby improving the efficiency.
Further, the condenser 3 is connected with the boiler 1 through a condensate pump 10 and a feed water regenerative system 11, a main throttle 12 is arranged between the boiler 1 and a high-pressure turbine cylinder, and the high-pressure turbine cylinder is adjusted through the main throttle 12 and can operate at a constant pressure or at a sliding pressure.
In addition, the arrangement of the first channel and the second channel in the deep peak shaving high-efficiency steam turbine power generation system with single shaft arrangement of the present invention, as shown in fig. 1 and fig. 2, can adopt the first intermediate pressure cylinder 6 and the second intermediate pressure cylinder 8, and the first low pressure cylinder 7 and the second low pressure cylinder 9 to be arranged together; it is also possible to use the first intermediate pressure cylinder 6 and the first low pressure cylinder 7, and the second intermediate pressure cylinder 8 and the second low pressure cylinder 9 arranged together; the first intermediate pressure cylinder 6 and the first low pressure cylinder 7 may be disposed near the high pressure cylinder 5 or near the generator 2.
To sum up, the utility model provides a high-efficient turbine power generation system of degree of depth peak regulation of unipolar arrangement is applicable to 300MW ~ 1000MW unit, can be applicable to once reheat or two reheat unit, through setting up one set of ultrahigh pressure jar (if have) and high-pressure jar, two sets of intermediate pressure jar and low-pressure jar to divide into main and auxiliary channel, avoided complicated main steam and reheat steam flow distribution and parameter matching problem; under the low-load working condition, the heat efficiency and the stability of heat supply parameters under the low-load working condition can be conveniently adjusted and cut off.
The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.
Claims (8)
1. The utility model provides a high-efficient turbine power generation system of degree of depth peak regulation of unipolar arrangement, includes boiler (1), is connected and the steam turbine group of operation with boiler (1), its characterized in that: the steam turbine set comprises a steam turbine high-pressure cylinder, a first channel, a second channel and a generator (2) which are coaxially arranged with the steam turbine high-pressure cylinder, steam of the boiler (1) is sent into the steam turbine high-pressure cylinder, exhaust of the steam turbine high-pressure cylinder enters the boiler (1) to be reheated and then is sent into the first channel and the second channel respectively, the exhaust of the first channel and the exhaust of the second channel are connected with a condenser (3), and a pure condensing regulator valve (4) is arranged between the boiler (1) and the second channel.
2. The system of claim 1, wherein the system comprises: the high-pressure cylinder of the steam turbine comprises a high-pressure cylinder (5) and/or an ultrahigh-pressure cylinder.
3. The system of claim 1, wherein the system comprises: the first channel comprises a first intermediate pressure cylinder (6) and a first low pressure cylinder (7), the first intermediate pressure cylinder (6) receives reheated steam of the boiler (1) and exhausts the reheated steam to enter the first low pressure cylinder (7), and the first low pressure cylinder (7) exhausts the steam to enter the condenser (3).
4. The system of claim 1, wherein the system comprises: the second channel comprises a second intermediate pressure cylinder (8) and a second low pressure cylinder (9), the second intermediate pressure cylinder (8) receives reheated steam of the boiler (1) and exhausts the reheated steam to enter the second low pressure cylinder (9), and the exhaust of the second low pressure cylinder (9) enters the condenser (3).
5. The system of claim 4, wherein the system comprises: the pure condensing regulator valve (4) is arranged between the boiler (1) and the second intermediate pressure cylinder (8).
6. The system of claim 1, wherein the system comprises: and the high-pressure cylinder of the steam turbine and the first channel are both provided with steam extraction ports.
7. The system of claim 1, wherein the system comprises: the condenser (3) is connected with the boiler (1) through a condensate pump (10) and a feed water regenerative system (11).
8. The system of claim 1, wherein the system comprises: and a main throttle valve (12) is arranged between the boiler (1) and the high-pressure cylinder of the steam turbine.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122731724.1U CN216429691U (en) | 2021-11-09 | 2021-11-09 | High-efficient turbo electric power generation system of degree of depth peak regulation that unipolar was arranged |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122731724.1U CN216429691U (en) | 2021-11-09 | 2021-11-09 | High-efficient turbo electric power generation system of degree of depth peak regulation that unipolar was arranged |
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| CN216429691U true CN216429691U (en) | 2022-05-03 |
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| CN202122731724.1U Active CN216429691U (en) | 2021-11-09 | 2021-11-09 | High-efficient turbo electric power generation system of degree of depth peak regulation that unipolar was arranged |
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