CN213510768U - Steam extraction and condensation dual-purpose machine and cogeneration unit - Google Patents
Steam extraction and condensation dual-purpose machine and cogeneration unit Download PDFInfo
- Publication number
- CN213510768U CN213510768U CN202022068153.3U CN202022068153U CN213510768U CN 213510768 U CN213510768 U CN 213510768U CN 202022068153 U CN202022068153 U CN 202022068153U CN 213510768 U CN213510768 U CN 213510768U
- Authority
- CN
- China
- Prior art keywords
- pressure cylinder
- steam
- heat supply
- main
- heat
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/14—Combined heat and power generation [CHP]
Landscapes
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
The utility model discloses a dual-purpose machine of steam extraction and condensation and cogeneration unit includes: the main high-pressure cylinder, the main intermediate pressure cylinder, the main low-pressure cylinder and the main steam turbine generator are arranged on the main shaft, and the heat supply intermediate pressure cylinder, the heat supply low-pressure cylinder and the heat supply generator are arranged in a split shaft manner; the steam inlets of the main intermediate pressure cylinder and the heat supply intermediate pressure cylinder are communicated with a hot reheat steam outlet of the boiler, and the exhaust steam of the heat supply intermediate pressure cylinder supplies heat for a heat user. The double-shaft arrangement is adopted, the main shaft is provided with the main high-pressure cylinder, the main intermediate-pressure cylinder, the main low-pressure cylinder and the main steam wheel generator, the split shaft is provided with the heat supply intermediate-pressure cylinder, the heat supply low-pressure cylinder and the heat supply generator, heat is supplied to a heat user through the heat supply intermediate-pressure cylinder, and the heat supply efficiency is improved.
Description
Technical Field
The present disclosure relates to a steam extraction and condensation dual-purpose machine and a cogeneration unit.
Background
The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art.
At present, a heat and power cogeneration mode is adopted for supplying heat to heat users, and the method specifically comprises the following steps: when the boiler operates stably, steam entering a boiler superheater is heated in a hearth to form high-pressure steam, the high-pressure steam enters a high-pressure cylinder to do work, a part of the steam after doing work enters the boiler from the high-pressure cylinder to be heated again to form medium-pressure steam, the other part of the steam is communicated with a heat user, the medium-pressure steam is output in two paths, one path of the steam enters an intermediate pressure cylinder to do work and then enters a low-pressure cylinder to do work, the low-pressure cylinder is connected with a main steam turbine generator, and the other path of the steam and a part of the steam output after the high-pressure cylinder does work are communicated with the heat user to supply heat for the user, wherein.
Industrial steam in the range of 1.0-1.8 MPa is a common pressure range required by industrial users, industrial steam extraction can be realized by arranging a rotary partition plate in an intermediate pressure cylinder for large-flow adjustment of 350MW and 600 MW-grade cogeneration units, the rotary partition plate of the 350MW unit can extract 300t/h of steam at the maximum, the rotary partition plate of the 600 MW-grade unit can extract 400t/h of steam at the maximum, and 1000 MW-grade units have no rotary partition plate design products due to the large size of the intermediate pressure cylinder.
However, the number of the million-level supercritical units is increasing, and the demand of the million-level supercritical units for carrying combined heat and power is also increasing, so that a structure capable of realizing heat supply regulation of the million-level supercritical units is needed.
SUMMERY OF THE UTILITY MODEL
The steam extraction and condensation dual-purpose machine and the cogeneration unit are arranged in a double-shaft mode, a main high-pressure cylinder, a main middle-pressure cylinder, a main low-pressure cylinder and a main turbine generator are arranged on a main shaft, a heat supply middle-pressure cylinder, a heat supply low-pressure cylinder and a heat supply generator are arranged in a split-shaft mode, heat is supplied to a heat user through the heat supply middle-pressure cylinder, and heat supply efficiency is improved.
In one or more embodiments, an extraction and condensing dual-purpose machine is provided, including: the main high-pressure cylinder, the main intermediate pressure cylinder, the main low-pressure cylinder and the main steam turbine generator are arranged on the main shaft, and the heat supply intermediate pressure cylinder, the heat supply low-pressure cylinder and the heat supply generator are arranged in a split shaft manner;
the steam inlets of the main intermediate pressure cylinder and the heat supply intermediate pressure cylinder are communicated with a hot reheat steam outlet of the boiler, and the exhaust steam of the heat supply intermediate pressure cylinder supplies heat for a heat user.
In one or more embodiments, the cogeneration unit comprises the unit with the steam extraction and condensation dual-purpose machine.
In order to achieve the purpose, the following technical scheme is adopted in the disclosure:
compared with the prior art, the beneficial effect of this disclosure is:
1. the steam extracting and condensing dual-purpose machine adopts double-shaft arrangement, the main shaft is provided with the main high-pressure cylinder, the main intermediate-pressure cylinder, the main low-pressure cylinder and the main turbine generator, the split shaft is provided with the heat supply intermediate-pressure cylinder, the heat supply low-pressure cylinder and the heat supply generator, heat is supplied to a heat user through the heat supply intermediate-pressure cylinder, and the heat supply efficiency is improved.
2. The heat supply steam is provided by the steam exhaust of the heat supply intermediate pressure cylinder, the steam extraction temperature is low, and the unit combustion efficiency is higher than that of the conventional scheme.
3. When the high-load working condition is adopted, the butterfly valve is adopted to adjust the pressure of the externally-supplied heat steam, and a pressure reducing device is not required.
4. According to the steam supply device, under the low-load working condition, the pressure of the hot section is reduced, the medium-pressure combined steam valve and the butterfly valve jointly participate in regulating the external steam supply at the moment, the change of the unit efficiency and the external steam supply requirement can be considered, and the regulating means is more flexible than the conventional scheme.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.
FIG. 1 is a schematic diagram of a steam extraction and condensation dual-purpose machine of a million units in the prior art;
fig. 2 is a schematic structural diagram of embodiment 1 of the present disclosure.
Wherein: 1. the system comprises a medium-pressure combined steam valve, a 2 butterfly valve, a 3 safety valve, a 4 check valve, a 5 quick-closing regulating valve, a 6 electric shutoff valve, a 7 desuperheater.
The specific implementation mode is as follows:
the present disclosure is further described with reference to the following drawings and examples.
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 application 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 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.
In the present disclosure, terms such as "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "side", "bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only relational terms determined for convenience in describing structural relationships of the parts or elements of the present disclosure, and do not refer to any parts or elements of the present disclosure, and are not to be construed as limiting the present disclosure.
In the present disclosure, terms such as "fixedly connected", "connected", and the like are to be understood in a broad sense, and mean either a fixed connection or an integrally connected or detachable connection; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present disclosure can be determined on a case-by-case basis by persons skilled in the relevant art or technicians, and are not to be construed as limitations of the present disclosure.
Example 1
Under the great trend of national energy conservation and emission reduction, the small-capacity unit is gradually shut down, and a million-level ultra-supercritical unit with higher energy conservation and high efficiency is replaced. Meanwhile, with the gradual elimination of the requirements of small coal-fired thermoelectric units with small unit capacity, high energy consumption and heavy pollution, national policies such as newly building a condensation coal-fired cogeneration project and replacing shutting down a coal-fired boiler and a hook of the small thermoelectric unit are released, and the requirement of designing the function of bearing cogeneration by million units is gradually increased. Industrial steam in the range of 1.0 to 1.8MPa is a common pressure range required by industrial users. The industrial steam extraction device can realize heat supply by arranging a rotary clapboard on an intermediate pressure cylinder for large-flow adjustment of 350MW and 600MW grade units. The maximum steam extraction of the 350MW unit rotary partition plate is 300t/h, the maximum steam extraction of the 600MW grade rotary partition plate is 400t/h, and the 1000MW grade unit has no rotary partition plate design product due to the larger size of the middle cylinder.
A steam extraction and condensation dual-purpose machine of a million units is a conventional hot section and cold section combined steam extraction scheme if a large-flow adjustment industrial steam heating design is realized, and the structural principle is shown in figure 1. The dual-purpose machine type of steam extraction and condensation is designed according to the pure condensation working condition, when the working condition of large-flow heat supply is carried out, the deviation of the medium-pressure cylinder and the low-pressure cylinder from the design working condition is more, the efficiency is low, the advantage of millions of machine set heat supply can not be embodied, meanwhile, the temperature of the hot section steam extraction and heat supply is higher, the heat supply is carried out after temperature reduction is needed, the system is low in fire efficiency, the high-load operation working condition of the machine set is higher in pressure of the hot section, the regulating valve is needed to carry out heat supply after pressure reduction, the low-load operation working condition of the machine set is needed, a middle connecting door is needed to.
This embodiment, in order to realize the whole efficiency of million units heat supply operating mode, discloses an extraction steam condensing dual-purpose machine, adopts the biax to arrange, and main high pressure jar, main intermediate pressure jar, main low pressure jar and main turbine generator are arranged to the main shaft, and the heat supply intermediate pressure jar, heat supply low pressure jar and heat supply generator are arranged to the branch axle, for the heat user heat supply through the heat supply intermediate pressure jar, have improved heating efficiency, and the structural principle is as shown in figure 2, include: the main low-pressure cylinder is connected with the main steam wheel generator, and the heat supply low-pressure cylinder is connected with the heat supply generator;
the steam inlets of the main intermediate pressure cylinder and the heat supply intermediate pressure cylinder are communicated with a hot reheat steam outlet of the boiler, and the exhaust steam of the heat supply intermediate pressure cylinder supplies heat for a heat user.
The main turbine generator still adopts the coaxial arrangement scheme of the main high-pressure cylinder, the main intermediate-pressure cylinder, the main low-pressure cylinder and the main turbine generator, and the through-flow design of the main intermediate-pressure cylinder and the main low-pressure cylinder is reduced.
The steam inlet of the main high-pressure cylinder is communicated with the main steam outlet of the boiler, the steam outlet of the main high-pressure cylinder is communicated with the hot reheating steam inlet of the boiler, and the steam of the heat regeneration system is still extracted by the main high-pressure cylinder, the main intermediate-pressure cylinder and the main low-pressure cylinder of the main steam turbine.
The steam outlet of the main intermediate pressure cylinder is communicated with the steam inlet of the main low pressure cylinder.
The steam outlet of the heat supply intermediate pressure cylinder is communicated with the steam inlet of the heat supply low pressure cylinder.
The hot reheat steam outlet of boiler divides two the tunnel, all the way to the main intermediate pressure jar of main steam turbine, all the way to the heat supply intermediate pressure jar of heat supply steam turbine, the steam inlet of main intermediate pressure jar and heat supply intermediate pressure jar all sets up the joint steam valve 1 of middling pressure, and heat supply extraction steam is taken out from the heat supply intermediate pressure jar and is arranged vapour, and heat supply intermediate pressure jar and heat supply low pressure jar pass through communicating pipe intercommunication, sets up butterfly valve 2 on the communicating pipe, through the extraction steam pressure of butterfly valve 2 adjustment heat supply.
The steam outlet of the heat supply intermediate pressure cylinder is also communicated with a heat supply pipeline, and the heat supply pipeline leads to a heat user to supply heat for the heat user through the heat supply intermediate pressure cylinder.
The heat supply pipeline is sequentially connected with a safety valve 3, a check valve 4, a quick-closing regulating valve 5, an electric shutoff valve 6 and a desuperheater 7 in series.
The dual-purpose machine for steam extraction and condensation in the embodiment can realize the following technical effects:
1. the main steam turbine is designed according to the pure condensing working condition and still in the high-efficiency area, only part of the heat supply steam turbine deviates from the pure condensing design working condition, and the whole efficiency of the heat supply working condition of the unit is higher than that of the conventional design scheme.
2. The heat supply steam is provided by the steam exhaust of the heat supply intermediate pressure cylinder, the steam extraction temperature is low, and the efficiency of the unit for firing is higher than that of the conventional scheme.
3. When the unit is in a high-load working condition, the butterfly valve is adopted to adjust the external steam supply pressure, and a pressure reducing device is not required.
4. When the unit is in a low-load working condition, the pressure of the hot section is reduced, the medium-pressure combined steam valve and the butterfly valve jointly participate in adjusting the external steam supply at the moment, the efficiency of the unit and the requirement change of the external steam supply can be considered, and the adjusting means is more flexible than the conventional scheme.
Taking a 1000MW grade ultra-supercritical external supply 1.9MPa and 290 ℃ industrial steam extraction 1000t/h steam extraction and condensation dual-purpose machine as an example, the running economic benefit analysis is carried out, and the calculation results of the thermal economic indexes under the rated load heat supply working condition and the 70% load heat supply working condition are shown in tables 1 and 2.
Table 1: thermal economic index calculation contrast of rated heat supply load
Table 2: thermal economic index calculation comparison of 70% rated heating load
As can be seen from the above table, compared with the conventional scheme, the rated heat supply working condition power generation standard coal consumption is reduced by about 16.8g/kwh, and when the load is 70% and steam is supplied at 700t/h, the coal consumption difference is about 8.3 g/kwh. According to the standard coal price of 700 yuan/ton and the annual utilization hours of the unit of 4500, the annual operating income of the steam extraction and condensation dual-purpose machine disclosed by the embodiment is about 5300 ten thousand yuan compared with the annual operating income of the conventional scheme, and the economic benefit is obvious.
Example 2
In this embodiment, a cogeneration unit is disclosed, and the steam extraction and condensation dual-purpose machine disclosed in embodiment 1 is used.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Although the present disclosure has been described with reference to specific embodiments, it should be understood that the scope of the present disclosure is not limited thereto, and those skilled in the art will appreciate that various modifications and changes can be made without departing from the spirit and scope of the present disclosure.
Claims (10)
1. The utility model provides an extraction of steam dual-purpose machine of condensing, its characterized in that includes: the main high-pressure cylinder, the main intermediate pressure cylinder, the main low-pressure cylinder and the main steam turbine generator are arranged on the main shaft, and the heat supply intermediate pressure cylinder, the heat supply low-pressure cylinder and the heat supply generator are arranged in a split shaft manner;
the steam inlets of the main intermediate pressure cylinder and the heat supply intermediate pressure cylinder are communicated with a hot reheat steam outlet of the boiler, and the exhaust steam of the heat supply intermediate pressure cylinder supplies heat for a heat user.
2. The dual purpose machine for steam extraction and condensation as claimed in claim 1, wherein the steam inlet of the main high pressure cylinder is communicated with the main steam outlet of the boiler.
3. The dual purpose machine for steam extraction and condensation as claimed in claim 1, wherein the exhaust port of the main high pressure cylinder is communicated with the hot reheat inlet port of the boiler.
4. The dual purpose machine for steam extraction and condensation as claimed in claim 1, wherein the steam outlet of the main intermediate pressure cylinder is communicated with the steam inlet of the main low pressure cylinder.
5. The dual-purpose machine for steam extraction and condensation as claimed in claim 1, wherein the steam outlet of the heat-supplying medium pressure cylinder is communicated with the steam inlet of the heat-supplying low pressure cylinder.
6. The dual-purpose machine for steam extraction and condensation as claimed in claim 1, wherein a butterfly valve is connected between the steam outlet of the heat supply medium pressure cylinder and the steam inlet of the heat supply low pressure cylinder.
7. The dual-purpose machine for steam extraction and condensation as claimed in claim 1, wherein the steam outlet of the heat supply intermediate pressure cylinder is further communicated with a heat supply pipeline, and the heat supply pipeline is communicated with a heat user.
8. The dual-purpose machine for steam extraction and condensation as claimed in claim 1, wherein the steam inlets of the main intermediate pressure cylinder and the heat supply intermediate pressure cylinder are connected with an intermediate pressure combined steam valve.
9. The dual-purpose machine for steam extraction and condensation as claimed in claim 1, wherein the steam inlet of the medium and high pressure cylinder is communicated with a combined steam valve.
10. A cogeneration unit comprising a unit steam extraction and condensation dual-purpose machine as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022068153.3U CN213510768U (en) | 2020-09-18 | 2020-09-18 | Steam extraction and condensation dual-purpose machine and cogeneration unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022068153.3U CN213510768U (en) | 2020-09-18 | 2020-09-18 | Steam extraction and condensation dual-purpose machine and cogeneration unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213510768U true CN213510768U (en) | 2021-06-22 |
Family
ID=76448194
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022068153.3U Active CN213510768U (en) | 2020-09-18 | 2020-09-18 | Steam extraction and condensation dual-purpose machine and cogeneration unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213510768U (en) |
-
2020
- 2020-09-18 CN CN202022068153.3U patent/CN213510768U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102996191B (en) | Double-extraction adjustable heating system of thermal power generating unit | |
| CN103452611B (en) | Combined-cycle combined heat and power system | |
| CN206035553U (en) | Cogeneration system of combined cycle | |
| CN206035552U (en) | Cogeneration vapour turbine system | |
| CN104976671B (en) | Wide-load heat supply energy-saving system of back pressure type small steam turbine driven water feeding pump | |
| CN106194297A (en) | The double branch road heating system of a kind of cogeneration turbine | |
| CN107339128B (en) | Secondary reheating steam turbine with parallel ultrahigh pressure cylinders | |
| CN102505971A (en) | Heating system modifying method for realizing combination of heat and power by straight condensing unit | |
| CN210858830U (en) | Injection gas distribution depth thermoelectric decoupling system based on axial thrust balance | |
| CN110701663A (en) | Injection type heat pump exhaust steam recovery heat supply mode and system based on complete thermoelectric decoupling | |
| CN110656991A (en) | Injection gas distribution thermoelectric decoupling mode based on axial thrust balance and reheating balance | |
| CN111911250A (en) | Water supply combined cold recycling system and method for improving steam supply capacity of boiler | |
| CN112240231A (en) | Multi-source stable industrial steam supply system and method considering reliability and economy | |
| CN113864747A (en) | Industrial steam composite steam supply system | |
| CN112112691A (en) | Asynchronous power generation system for cascade utilization of industrial steam of thermal power plant and adjusting method | |
| CN203499735U (en) | Combined cycle co-generation system | |
| CN105443243A (en) | Gas-steam combined circulation system | |
| CN112065520B (en) | Cold and hot re-cooperative steam supply system and method | |
| CN114383176A (en) | Supercritical reheating double-backpressure-machine double-steam-extraction industrial heating system | |
| CN105042666B (en) | Wide-load heat supply energy-saving system of back pressure type small steam turbine driven draught fan | |
| CN206190339U (en) | Two branch road heating system of cogeneration steam turbine | |
| CN213510768U (en) | Steam extraction and condensation dual-purpose machine and cogeneration unit | |
| CN102997310A (en) | Low-temperature heat source warming and heating system of air cooling unit | |
| CN205206962U (en) | Gas and steam combined cycle system | |
| CN217382910U (en) | Full-cutting-cylinder combined heat and power generation system based on high-pressure injection temperature-reduction heat and power decoupling |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |