CN108868217B - Main plant with steam turbine transversely arranged at high position - Google Patents
Main plant with steam turbine transversely arranged at high position Download PDFInfo
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- CN108868217B CN108868217B CN201710340388.3A CN201710340388A CN108868217B CN 108868217 B CN108868217 B CN 108868217B CN 201710340388 A CN201710340388 A CN 201710340388A CN 108868217 B CN108868217 B CN 108868217B
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Abstract
The invention discloses a main plant with a steam turbine transversely arranged at high position, which comprises a boiler room, a coal room and a high-position steam turbine room; wherein, a coal mill is arranged in the coal bunker, and a high-level turbine unit is arranged in the high-level turbine room; the high-position turbine room is arranged at the top of the coal bunker room; the long axis direction of the high-order turbine unit is aligned with the central line of the boiler room or parallel to each other; the coal bunker bay is arranged in front of the boiler room; the coal mills in the coal bunker bay are arranged in parallel in double rows or in single rows. The main plant comprises a low-level turbine room, and a low-level turbine unit is arranged in the low-level turbine room. The main workshop ensures that the arrangement of the workshop is more reasonable, effectively saves space and places, and can reduce the unit cost of the power plant; the efficiency of the power plant is improved, the power supply coal consumption of the operation of the power plant can be reduced, the economy of the unit operation is improved, and the construction and the operation of the power plant are more competitive.
Description
Technical Field
The invention relates to the field of power generation, in particular to a main plant design with a turbine arranged transversely at a high position.
Background
Currently, the development of power generation technology of power plants is advanced along the development direction of the continuous improvement of the economy of the power plants. Various technical means such as a secondary reheating technology have been used in the design of power plants to improve the efficiency of the power plants. At the same time, the efficiency of the power plant is increased along with the increasing capacity of the unit. The power plant cost is increased due to various factors such as the increase of the unit capacity, the adoption of the secondary reheating technology and the like. With the continuous development of the technology of the thermal power plant and the increase of the single-machine capacity, the unit cost of the power plant is further reduced while the static efficiency of the power plant is pursued to be improved. At present, a brand new concept of a high-low-level arrangement turbine unit exists. That is, for a twin-shaft turbine set, one turbine may be disposed at a very high position near the outlet of the header of the boiler, referred to as a high-level turbine, to reduce the number of expensive high-level metal connection pipes between the turbine and the boiler, and the other turbine may be disposed in a main plant at a lower position, referred to as a low-level turbine, according to a conventional scheme in current power plant designs. The design scheme of the high-low-level arrangement turbine unit is shown in fig. 1.
The high-level arrangement of the whole or part of the steam turbine is a brand new technical conception, and the main factory building design matched with the high-level arrangement is needed to realize the conception, so that the high-level arrangement has engineering feasibility and can be converted into engineering application.
The prior art only indicates that the long axis direction of the coal bunker bay is parallel to the long axis direction of the high-position turbine room, and does not indicate the arrangement mode of coal mill equipment in the coal bunker bay. The coal bunker bay area is an important component of the design of the main plant of the power plant, and coal mill equipment in the coal bunker bay is also key equipment of the power plant.
Therefore, aiming at the conception of arranging the whole or part of the turbine unit at a high position, development of a coal bunker region design scheme matched with the turbine unit and a more optimized coal mill arrangement scheme are urgently needed in the field, so that the technical scheme of the whole main plant design is more reasonable and feasible.
Disclosure of Invention
The invention aims to provide a main plant design of a turbine machine room which is more reasonable, feasible and economical and is transversely arranged at a high position by considering the design of a coal bunker region and the arrangement of coal mill equipment in the coal bunker.
The invention provides a main plant for improving the high-level transverse arrangement of a steam turbine of a coal mill, which comprises a boiler room, a coal room and a high-level turbine room;
wherein, coal mills are arranged between the coal bins, and a high-level turbine unit is arranged in the high-level turbine room;
the high-level turbine room is arranged at the top of the coal bunker;
the long axis direction of the high-level turbine unit is aligned with the central line of the boiler room or parallel to each other;
the coal bunker bay is arranged in front of the boiler room;
the coal mills in the coal bunker bay are arranged in a row.
The coal bunker bay is connected with the boiler room through a mechanical conveying system and a flue gas and pulverized coal pipeline.
The boiler room is connected with the high-order turbine room through a steam pipeline, and the steam pipeline is flexibly arranged to meet the stress calculation requirement, so that the long axis direction of the high-order turbine is aligned with the central line of the boiler room or arranged in parallel to meet the safe operation requirement.
The height at the top of boiler room is H1, the position height of arranging of high-order turbine group is H2 to satisfy: H1-H2 is more than 0 and less than 60m.
In another preferred embodiment, the main building comprises a low-level turbine room; and a low-level steam turbine unit is arranged in the low-level steam turbine room.
The boiler room is connected with the low-level turbine room through a steam pipeline.
The arrangement position height of the low-level turbine unit is H3, and the following conditions are satisfied: H2-H3 > 10m.
In another preferred embodiment, the coal mills are arranged in parallel in double rows.
In another preferred embodiment, the coal mills are arranged in a single row.
In another preferred embodiment, the long axis direction of each row of the coal mill is parallel to the long axis direction of the high-level turbine unit.
In another preferred embodiment, the long axis direction of each row of the coal mill is perpendicular to the long axis direction of the high-level turbine unit.
In another preferred example, the turbine set in the main plant is a single-shaft turbine set.
In another preferred example, the turbine set in the main plant is a double-shaft turbine set.
In another preferred embodiment, the main plant further comprises a thermodynamic system device, which is arranged within the coal bunker.
The low-level turbine room can be arranged at any position around the boiler room, and the long axis direction of the low-level turbine unit is irrelevant to the long axis direction of each row of coal mills and can be in any direction.
It is understood that within the scope of the present invention, the above-described technical features of the present invention and technical features specifically described below (e.g., in the examples) may be combined with each other to constitute new or preferred technical solutions. And are limited to a space, and are not described in detail herein.
Drawings
FIG. 1 is a schematic illustration of a high and low layout turbine set;
FIG. 2 is a top view of a main building according to one embodiment of the present invention;
FIG. 3 is a right side view of the main building of FIG. 2 according to one embodiment of the present invention;
FIG. 4 is a top view of a main building according to another embodiment of the present invention;
FIG. 5 is a right side view of the main building of FIG. 4 according to another embodiment of the present invention;
FIG. 6 is a top view of a main building according to another embodiment of the present invention;
FIG. 7 is a right side view of the main building of FIG. 6 according to another embodiment of the present invention;
FIG. 8 is a top view of a main building according to another embodiment of the present invention;
FIG. 9 is a right side view of the main building of FIG. 8 according to another embodiment of the present invention;
FIG. 10 is a top view of a main building according to another embodiment of the present invention;
FIG. 11 is a right side view of the main building of FIG. 10 according to another embodiment of the present invention;
FIG. 12 is a top view of a main building according to another embodiment of the present invention;
Fig. 13 is a right side view of the main building of fig. 12 according to another embodiment of the present invention.
The reference numerals in the drawings are as follows:
1: a boiler room;
2: a coal bunker bay;
3: a coal mill;
4: high-order turbine room;
5: a low-level turbine room;
6: high-order turbine group;
7: a low-level turbine unit;
8: and (5) a coal feeder.
Detailed Description
The inventor has conducted extensive and intensive studies to develop, for the first time, a main plant design of a turbine plant taking into consideration a coal house area design and a coal mill equipment arrangement in a coal house, for a turbine plant arranged in a high-level horizontal direction, when designing the main plant of a power plant. The present invention has been completed on the basis of this finding.
Terminology
As used herein, the term "transversely disposed steam turbine" refers to a steam turbine disposed in a manner such that the steam turbine is positioned on the front side of the boiler room and the long axis direction of the steam turbine is aligned with the center line of the boiler room or parallel to each other.
As used herein, the term "high-positioned turbine" refers to a turbine that is positioned in a manner that is referred to as a high-positioned turbine when the elevation of the operating floor of the turbine is high (e.g., greater than 30 meters from the ground) for the entire turbine or for a portion of the turbine.
As used herein, the term "low-lying turbine" refers to a turbine that is said to be low-lying when the operating floor elevation of the turbine arrangement is low (e.g., less than 30 meters from the ground) for the entire turbine or for a portion of the turbine.
As used herein, the term "main building" means that major equipment of a thermal power plant, such as a turbo generator, a deaerator, a heater, a coal bunker, a coal mill, a feed pump driving equipment, etc., are all disposed indoors, and in some cases a boiler is also disposed indoors, and a building accommodating these equipment is called a main building. The main building generally includes: a turbine room, a coal bunker room (area) and a boiler room.
As used herein, the term "stoker coal pulverizer arrangement" refers to a region of the coal pulverizer arrangement between the turbine room and the boiler room, and in front of the boiler room.
As used herein, the term "stokehold coal bay" refers to the area of the coal bay that is disposed between the turbine room and the boiler room and is located in front of the boiler room.
As used herein, "forward of the furnace" and "forward of the boiler room" are used interchangeably to refer to the area of the boiler room adjacent the turbine room.
The technical scheme commonly adopted in the prior art is mainly designed for the coal bunker bay area under the technical route of a single-shaft low-position steam turbine or a double-shaft low-position steam turbine set. Because the technical routes are different, if the original coal bunker arrangement mode is still adopted for the main plant of the high-position (or high-low-position) steam turbine set, the main plant design cannot be organically combined, the reasonable distribution of each area and space is achieved, the occupied size and construction cost of the main plant are increased, and the advantage of reducing the unit cost of the high-position (or high-low-position) steam turbine set cannot be exerted.
The invention provides reasonable and targeted coal bunker region design and coal mill arrangement for engineering application aiming at the brand new technical concept of arranging the whole or part of the steam turbines at high positions so as to fully exert the advantage of reducing unit cost of the high-position (or high-low-position) steam turbine set.
In the invention, aiming at the high-level arrangement of the whole or part of steam turbines, the design scheme of the coal bunker area is as follows:
(1) The design scheme of the coal bunker bay area is applied to the design of a main plant adopting a high-level arrangement whole or partial steam turbine.
(2) The high-level steam turbine room is arranged at the top of the coal bunker by combining the coal bunker with the high-level steam turbine arrangement, and the long axis direction of the high-level steam turbine is aligned with the central line of the boiler room or parallel to each other (namely, the high-level steam turbines are transversely arranged).
(3) The coal bunker bay is positioned in front of the boiler room, namely the stokehold coal bunker bay.
(4) The coal mill equipment adopts a row arrangement mode and is positioned in the coal bunker. The coal mill is arranged in a row and comprises a single row arrangement and a double-row parallel arrangement.
(5) The long axis direction of each row of the double-row coal mill can be parallel to the long axis direction of the high-order steam turbine, and can also be perpendicular to the long axis direction of the high-order steam turbine.
The long axis direction of the single-row coal mill can be parallel to the long axis direction of the high-order steam turbine, and can be perpendicular to the long axis direction of the high-order steam turbine.
(6) The coal bunker bay arrangement can be used for a main plant of a turbine which is arranged at a complete high position; the system can also be used for a main plant of a high-low-level arrangement steam turbine, and a low-level steam turbine room can be located at any position around a boiler room.
(7) The novel high-position (or high-low-position) arrangement steam turbine is applicable to a single-reheat thermal power plant and a double-reheat thermal power plant in the coal bunker space area arrangement.
(8) The novel high-position (or high-low-position) arrangement steam turbine is applicable to the pure condensing steam turbine generator unit and the back pressure steam turbine generator unit in the coal bunker space area arrangement.
(9) The novel high-position (or high-low-position) arrangement steam turbine is applicable to a single unit and a plurality of units for continuous construction.
The main advantages of the invention include:
(a) The main plant design scheme provided by the invention can reduce the power supply coal consumption of the operation of the power plant and improve the economy of the operation of the unit.
(B) The main plant design scheme provided by the invention improves the efficiency of the power plant, ensures that the plant is more reasonable in arrangement, and effectively saves space and places.
(C) The main plant design scheme provided by the invention can further reduce the unit cost of the power plant while improving the efficiency of the power plant, so that the construction and operation of the power plant are more competitive.
The invention will be further illustrated with reference to specific examples. It is to be understood that these examples are illustrative of the present invention and are not intended to limit the scope of the present invention. The experimental methods, in which specific conditions are not noted in the following examples, are generally conducted under conventional conditions or under conditions recommended by the manufacturer. Percentages and parts are weight percentages and parts unless otherwise indicated.
It should be noted that in the claims and the description of this patent, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
Example 1
As shown in fig. 2 and 3, a schematic diagram of a main building according to a preferred embodiment of the present invention. In the embodiment, the main plant adopts an arrangement scheme of 'stokehold coal bunker bay + full high-level turbine room'. The main factory building of the high-level transversely arranged turbine room for improving the arrangement of the coal mill comprises a boiler room 1, a coal room 2 and a high-level turbine room 4. A coal mill 3 and a coal feeder 8 are arranged in the coal bunker bay 2. The high-level turbine room 4 is provided with a high-level turbine unit 6, and the high-level turbine unit 6 is a single-shaft turbine. The design of the coal bunker bay 2 is combined with the arrangement of the high-level steam turbine unit 6, the high-level steam turbine unit 4 is arranged at the top of the coal bunker bay 2, the long axis direction of the high-level steam turbine unit 6 is aligned with the central line of the boiler room 1 or parallel to each other, and the coal bunker bay 2 is arranged in front of the boiler room 1. The coal mills 3 are arranged in parallel in double rows, and the long axis direction of each row of the coal mills 3 is mutually perpendicular to the long axis direction of the high-position turbine unit 6.
Example 2
As shown in fig. 4 and 5, a main building according to another preferred embodiment of the present invention is schematically shown. In the embodiment, the main plant adopts an arrangement scheme of 'stokehold coal bunker bay + full high-level turbine room'. The main factory building of the high-level transversely arranged turbine room for improving the arrangement of the coal mill comprises a boiler room 1, a coal room 2 and a high-level turbine room 4. A coal mill 3 and a coal feeder 8 are arranged in the coal bunker bay 2. The high-level turbine room 4 is provided with a high-level turbine unit 6, and the high-level turbine unit 6 is a single-shaft turbine. The design of the coal bunker bay 2 is combined with the arrangement of the high-level steam turbine unit 6, the high-level steam turbine unit 4 is arranged at the top of the coal bunker bay 2, the long axis direction of the high-level steam turbine unit 6 is aligned with the central line of the boiler room 1 or parallel to each other, and the coal bunker bay 2 is arranged in front of the boiler room 1. The coal mills 3 are arranged in parallel in double rows, and the long axis direction of each row of the coal mills 3 is parallel to the long axis direction of the high-position turbine unit 6.
Example 3
As shown in fig. 6 and 7, a main building of another preferred embodiment of the present invention is schematically illustrated. In the embodiment, the main plant adopts an arrangement scheme of a stokehold coal bunker bay and a high-low steam turbine room. The main factory building of the high-level horizontal steam turbine room for improving the arrangement of the coal mill comprises a boiler room 1, a coal room 2, a high-level steam turbine room 4 and a low-level steam turbine room 5. A coal mill 3 and a coal feeder 8 are arranged in the coal bunker bay 2. The turbine set in the main plant is a double-shaft turbine set, the turbine set of the first shafting is a high-position turbine set 6, and the high-position turbine set 6 is arranged in the high-position turbine set 4; the turbine unit of the second shaft system is a low-level turbine unit 7, and the low-level turbine unit 7 is arranged in the low-level turbine room 5. The design of the coal bunker bay 2 is combined with the arrangement of the high-level steam turbine unit 6, the high-level steam turbine unit 4 is arranged at the top of the coal bunker bay 2, the long axis direction of the high-level steam turbine unit 6 is aligned with the central line of the boiler room 1 or parallel to each other, and the coal bunker bay 2 is arranged in front of the boiler room 1. The coal mills 3 are arranged in parallel in double rows, and the long axis direction of each row of the coal mills 3 is mutually perpendicular to the long axis direction of the high-position turbine unit 6. The low-level turbine rooms 5 are arranged independently, and the low-level turbine rooms 5 are arranged on the side face of the boiler room 1.
The low-level turbine room 5 can be arranged at any position around the boiler room 1, and the long axis direction of the low-level turbine unit 7 is irrelevant to the long axis direction of each row of the coal mill 3, and can be in any direction.
Example 4
As shown in fig. 8 and 9, a main building of another preferred embodiment of the present invention is schematically illustrated. In the embodiment, the main plant adopts an arrangement scheme of a stokehold coal bunker bay and a high-low steam turbine room. The main factory building of the high-level horizontal steam turbine room for improving the arrangement of the coal mill comprises a boiler room 1, a coal room 2, a high-level steam turbine room 4 and a low-level steam turbine room 5. A coal mill 3 and a coal feeder 8 are arranged in the coal bunker bay 2. The turbine set in the main plant is a double-shaft turbine set, the turbine set of the first shafting is a high-position turbine set 6, and the high-position turbine set 6 is arranged in the high-position turbine set 4; the turbine unit of the second shaft system is a low-level turbine unit 7, and the low-level turbine unit 7 is arranged in the low-level turbine room 5. The design of the coal bunker bay 2 is combined with the arrangement of the high-level steam turbine unit 6, the high-level steam turbine unit 4 is arranged at the top of the coal bunker bay 2, the long axis direction of the high-level steam turbine unit 6 is aligned with the central line of the boiler room 1 or parallel to each other, and the coal bunker bay 2 is arranged in front of the boiler room 1. The coal mills 3 are arranged in parallel in double rows, and the long axis direction of each row of the coal mills 3 is parallel to the long axis direction of the high-position turbine unit 6. The low-level turbine rooms 5 are arranged independently, and the low-level turbine rooms 5 are arranged on the side face of the boiler room 1.
The low-level turbine room 5 can be arranged at any position around the boiler room 1, and the long axis direction of the low-level turbine unit 7 is irrelevant to the long axis direction of each row of the coal mill 3, and can be in any direction.
Example 5
As shown in fig. 10 and 11, a schematic diagram of a main building according to a preferred embodiment of the present invention. In the embodiment, the main plant adopts an arrangement scheme of 'stokehold coal bunker bay + full high-level turbine room'. The main factory building of the high-level transversely arranged turbine room for improving the arrangement of the coal mill comprises a boiler room 1, a coal room 2 and a high-level turbine room 4. A coal mill 3 and a coal feeder 8 are arranged in the coal bunker bay 2. The high-level turbine room 4 is provided with a high-level turbine unit 6, and the high-level turbine unit 6 is a single-shaft turbine. The design of the coal bunker bay 2 is combined with the arrangement of the high-level steam turbine unit 6, the high-level steam turbine unit 4 is arranged at the top of the coal bunker bay 2, the long axis direction of the high-level steam turbine unit 6 is aligned with the central line of the boiler room 1 or parallel to each other, and the coal bunker bay 2 is arranged in front of the boiler room 1. The coal mills 3 are arranged in a single row, and the long axis direction of the single row coal mills 3 is mutually perpendicular to the long axis direction of the high-position turbine unit 6.
Example 6
As shown in fig. 12 and 13, a main building of another preferred embodiment of the present invention is schematically illustrated. In the embodiment, the main plant adopts an arrangement scheme of a stokehold coal bunker bay and a high-low steam turbine room. The main factory building of the high-level horizontal steam turbine room for improving the arrangement of the coal mill comprises a boiler room 1, a coal room 2, a high-level steam turbine room 4 and a low-level steam turbine room 6. A coal mill 3 and a coal feeder 8 are arranged in the coal bunker bay 2. The turbine set in the main plant is a double-shaft turbine set, the turbine set of the first shafting is a high-position turbine set 6, and the high-position turbine set 6 is arranged in the high-position turbine set 4; the turbine unit of the second shaft system is a low-level turbine unit 7, and the low-level turbine unit 7 is arranged in the low-level turbine room 5. The design of the coal bunker bay 2 is combined with the arrangement of the high-level steam turbine unit 6, the high-level steam turbine unit 4 is arranged at the top of the coal bunker bay 2, the long axis direction of the high-level steam turbine unit 6 is aligned with the central line of the boiler room 1 or parallel to each other, and the coal bunker bay 2 is arranged in front of the boiler room 1. The coal mills 3 are arranged in a single row, and the long axis direction of the single row coal mills 3 is mutually perpendicular to the long axis direction of the high-position turbine unit 6. The low-level turbine rooms 5 are arranged independently, and the low-level turbine rooms 5 are arranged on the side face of the boiler room 1.
The low-level turbine room 5 can be arranged at any position around the boiler room 1, and the long axis direction of the low-level turbine unit 7 is irrelevant to the long axis direction of each row of the coal mill 3, and can be in any direction.
Simulation proves that the main plant can meet the safety level requirement. The main workshop is designed, so that the overall structure of the main workshop is more compact and the occupied area is smaller by optimizing the pipeline design on the basis of ensuring the safety of the pipeline.
All documents mentioned in this disclosure are incorporated by reference in this disclosure as if each were individually incorporated by reference. Further, it will be appreciated that various changes and modifications may be made by those skilled in the art after reading the above teachings, and such equivalents are intended to fall within the scope of the application as defined in the appended claims.
Claims (7)
1. The main plant is characterized by comprising a boiler room, a coal room and a high-level turbine room;
wherein, coal mills are arranged between the coal bins, and a high-level turbine unit is arranged in the high-level turbine room;
the high-level turbine room is arranged at the top of the coal bunker;
the long axis direction of the high-level turbine unit is aligned with the central line of the boiler room or parallel to each other;
the coal bunker bay is arranged in front of the boiler room;
the coal mills in the coal bunker bay are arranged in a row;
the height at the top of boiler room is H1, the position height of arranging of high-order turbine group is H2 to satisfy: H1-H2 is more than 0 and less than 60m;
The main plant comprises a low-level turbine room; a low-level turbine unit is arranged in the low-level turbine room; the arrangement position height of the high-order turbine unit is H2, the arrangement position height of the low-order turbine unit is H3, and the following conditions are satisfied: H2-H3 > 10m.
2. The main building according to claim 1, wherein the coal bunker is connected to the boiler room by a mechanical conveying system and a pulverized coal pipe.
3. The main building according to claim 1, wherein the boiler room is connected to the high-level turbine room by a steam pipe, the steam pipe being arranged flexibly.
4. The main building of claim 1, wherein the coal mill rows are arranged in parallel.
5. The main building of claim 1, wherein the coal mills are arranged in a single row.
6. The main building of claim 1, wherein the long axis direction of each row of coal mills is parallel to the long axis direction of the high-level turbine unit.
7. The main building of claim 1, wherein the long axis direction of each row of coal mills is perpendicular to the long axis direction of the high-level turbine unit.
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| CN109484817A (en) * | 2018-11-26 | 2019-03-19 | 中国电力工程顾问集团西南电力设计院有限公司 | CFB unit is delivered coal system |
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| JP5462128B2 (en) * | 2010-10-27 | 2014-04-02 | 株式会社日立製作所 | Thermal power plant |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101042058A (en) * | 2007-04-27 | 2007-09-26 | 冯伟忠 | Novel steam-electric generating set |
| CN203783197U (en) * | 2013-12-24 | 2014-08-20 | 武汉凯迪电力工程有限公司 | Layout structure of main power house of large-sized clean combustion power station |
| CN207296503U (en) * | 2017-05-15 | 2018-05-01 | 中国电力工程顾问集团华东电力设计院有限公司 | A kind of main building of steam turbine high position lateral arrangement |
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| CN108868217A (en) | 2018-11-23 |
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