CN108679586B - Photo-thermal-pulverized coal linkage coupling boiler and steam-water separation method - Google Patents
Photo-thermal-pulverized coal linkage coupling boiler and steam-water separation method Download PDFInfo
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- CN108679586B CN108679586B CN201810433789.8A CN201810433789A CN108679586B CN 108679586 B CN108679586 B CN 108679586B CN 201810433789 A CN201810433789 A CN 201810433789A CN 108679586 B CN108679586 B CN 108679586B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B1/00—Methods of steam generation characterised by form of heating method
- F22B1/02—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers
- F22B1/06—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being molten; Use of molten metal, e.g. zinc, as heat transfer medium
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B37/00—Component parts or details of steam boilers
- F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
- F22B37/26—Steam-separating arrangements
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- 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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/40—Solar thermal energy, e.g. solar towers
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Abstract
A photo-thermal-pulverized coal linkage coupling boiler and a steam-water separation method. The working medium water is heated by the water-cooling wall of the pulverized coal boiler to form a steam-water mixture, the steam-water mixture enters a steam-water separator for separation, high-quality saturated steam is separated and enters the superheater for further heating, and the separated water working medium enters the bottom of the boiler through the downcomer and then enters the water-cooling wall again for heating, so that the period of producing steam is prolonged. The invention comprises the following components: the solar energy boiler comprises a rotating disc (1), the rotating disc is installed at the outer top of the boiler, a groove type solar heat collector (2) is installed on the rotating disc and comprises a group of groove type parabolic mirrors and a heat collecting pipe, solar tracking controllers are installed on two sides of each groove type parabolic mirror, the groove type heat collector is connected with an evaporator (3) through a molten salt loop, and the evaporator is connected with a steam-water separator (4) and a steam turbine middle-low pressure exhaust collecting pipe (5) respectively. The invention is used for generating electricity by replacing pulverized coal with photo-thermal power and improves the efficiency of generating saturated steam of the boiler.
Description
The technical field is as follows:
the invention relates to a photo-thermal-pulverized coal linkage coupling boiler and a steam-water separation method.
Background art:
the working medium water is heated by the water-cooling wall of the pulverized coal boiler to form a steam-water mixture, the steam-water mixture enters a steam-water separator for separation, high-quality saturated steam is separated and enters the superheater for further heating, the separated water working medium enters the bottom of the boiler through the downcomer and then enters the water-cooling wall again for heating, the period of producing steam is prolonged, and meanwhile, pulverized coal is consumed again, so that the pulverized coal boiler is not energy-saving and environment-friendly.
The invention content is as follows:
the invention aims to provide a photo-thermal-pulverized coal linkage coupling boiler and a steam-water separation method.
The above purpose is realized by the following technical scheme:
a photo-thermal-pulverized coal linkage coupling boiler comprises: the rotary disk is characterized in that: the solar energy boiler is characterized in that the rotating disc is installed at the outer top of the boiler, a groove type solar heat collector is installed on the rotating disc and comprises a group of groove type paraboloidal mirrors and heat collecting pipes, solar tracking controllers are installed on two sides of each groove type paraboloidal mirror, the groove type solar heat collector is connected with the evaporator through a molten salt loop, and the evaporator is connected with a steam-water separator water separation outlet and a steam turbine middle and low pressure cylinder exhaust collecting pipe respectively.
The solar collector tube is characterized in that a nickel-based stainless tube is arranged inside the collector tube, a glass tube is arranged outside the nickel-based stainless tube, vacuum is formed between the nickel-based stainless tube and the glass tube, a light absorption material is coated on the outer wall of the nickel-based stainless tube, and a working medium inside the nickel-based stainless tube is molten salt.
The steam-water separation method of the photo-thermal-pulverized coal linkage coupling boiler comprises the following steps: the groove type solar heat collector is arranged at the outer top of the boiler, the lower rotary disc rotates to the sun through the solar tracking controller, molten salt heated by the heat collecting tube enters an evaporator in the boiler, steam-water mixture discharged after a steam turbine intermediate pressure cylinder and a low pressure cylinder do work is directly secondarily heated, water separated by the steam-water separator is secondarily heated at the same time to generate secondary steam-water mixture, the secondary steam-water mixture and primary steam-water mixture from a header on a water wall enter the steam-water separator to be separated again, in order to prevent turbulent flow and vibration generated when two kinds of working media are converged, anti-hedging baffles are additionally arranged at the converging position of the two kinds of working media among a steam turbine, an exhaust pipe of the low pressure cylinder and a water outlet of the steam-water separator, the circulation is carried out, cold molten salt after heat release flows back to the groove type solar heat collector at the outer top of the boiler through a pipeline, and the cold molten salt in the pipeline, the heating efficiency of slot type solar collector has been promoted.
Has the advantages that:
according to the invention, the groove type solar heat collector is additionally arranged at the outer top of the boiler, and the base is a rotating disk, so that the groove type paraboloidal mirror is ensured to face the sun constantly, and the maximum light collecting efficiency is ensured.
The invention adds a small evaporator at the side of the steam-water separator, so that the high-temperature molten salt generated by the groove type solar heat collector secondarily heats the water separated by the steam-water separator and the exhaust gas of the middle and low pressure cylinders of the steam turbine in the evaporator to generate a secondary steam-water mixture, and the secondary steam-water mixture enters the steam-water separator again.
The invention saves energy and protects environment, and improves the heat efficiency of the boiler from two aspects of steam generation time (t) and steam flow (v) generated in unit time. The temperature of main steam is 605 ℃, the outlet header of a water wall is 480 ℃, and the coal powder is replaced by photo-thermal to heat the water working medium, so that the flow of the main steam of the boiler is increased by about 2 percent, and the efficiency can be improved. Coal powder consumption: when the main steam flow is 2900t/h, 550t of standard coal/h is consumed, the standard coal cost is 500 yuan/ton, 27.5 ten thousand yuan/h of standard coal is consumed, the main steam flow is increased by 58t/h through photo-thermal in each hour, and the standard coal price is 5500 yuan in each hour while the efficiency is improved.
The cold molten salt after heat release flows back to the groove type solar heat collector at the top outside the boiler through the pipeline, and the cold molten salt in the pipeline is also heated by hot combustion flue gas in the boiler in the process, so that the heating efficiency of the groove type solar heat collector is improved.
The invention replaces the process that the exhaust steam of the steam turbine enters the economizer after being condensed by the condenser and heated by the high-low pressure heater, and also replaces the process that the separated water of the steam-water separator returns to the lower water cooling wall header through the downcomer and then enters the hearth for heating. The cycle of generating high-quality saturated steam is accelerated, and the energy-saving and environment-friendly effects are achieved due to the fact that heat source consumption of steam which is reheated after condensation and secondarily heated in the hearth is reduced.
Description of the drawings:
FIG. 1 is a schematic structural diagram of the present invention.
FIG. 2 is a partially enlarged schematic view of the cycle of hot molten salt and saturated steam at the evaporator and steam-water separator of FIG. 1.
The specific implementation mode is as follows:
example 1:
a photo-thermal-pulverized coal linkage coupling boiler comprises: the solar boiler comprises a rotating disc 1, wherein the rotating disc is installed at the outer top of the boiler, a groove type solar thermal collector 2 is installed on the rotating disc and comprises a group of groove type parabolic mirrors and a thermal collecting tube, solar tracking controllers are installed on two sides of each groove type parabolic mirror, the groove type solar thermal collector is connected with an evaporator 3 through a molten salt loop, and the evaporator is connected with a water separation outlet of a steam-water separator 4 and a low-pressure exhaust collecting tube 5 in the steam turbine.
The outer layer of the heat collecting pipe is made of hard glass, the middle coil pipe is made of Ni-based alloy such as Inc o n e l 625, Inc o lo y 825 and Haynes230, and the outer wall of the coil pipe is coated with light absorbing material. The inner layer stainless steel straight pipe is made of austenitic stainless steel such as TP321, and the outer wall of the inner layer stainless steel straight pipe is coated with a reflective material, so that the coil heat collecting pipe can simultaneously absorb primary reflected light of the parabolic mirror (the outer side of the coil) and secondary reflected light of the inner pipe (the inner side of the coil). The medium in the coil pipe is hot melt salt, and absorbs light and heat. The medium in the stainless tube of the inner layer is hot oil or hot molten salt, the waste heat of the secondary reflected light is absorbed in the daytime, the heat is reversely released to the heat collecting tube vacuum system at night or in cloudy days, the air pressure in the heat collecting tube vacuum system is ensured, the influence on the vacuum environment caused by the fact that water vapor, dust, nitrogen oxide and the like are absorbed due to expansion with heat and contraction with cold is reduced, and the light absorption coating is corroded.
Example 2:
according to the photo-thermal-pulverized coal linkage coupling boiler in the embodiment 1, the heat collecting pipe is internally provided with a nickel-based stainless pipe, the nickel-based stainless pipe is externally provided with a glass pipe, vacuum is formed between the nickel-based stainless pipe and the glass pipe, the outer wall of the nickel-based stainless pipe is coated with a light absorbing material, and a working medium in the nickel-based stainless pipe is fused salt.
Example 3:
a steam-water separation method using the photo-thermal-pulverized coal linkage coupling boiler of embodiment 1-2 includes the following steps: the groove type solar heat collector is arranged at the outer top of the boiler, the lower rotary disc rotates to the sun through the solar tracking controller, molten salt heated by the heat collecting tube enters an evaporator in the boiler, steam-water mixture discharged after a steam turbine intermediate pressure cylinder and a low pressure cylinder do work is directly secondarily heated, water separated by the steam-water separator is secondarily heated at the same time to generate secondary steam-water mixture, the secondary steam-water mixture and primary steam-water mixture from a header on a water wall enter the steam-water separator to be separated again, in order to prevent turbulent flow and vibration generated when two kinds of working media are converged, anti-hedging baffles are additionally arranged at the converging position of the two kinds of working media among a steam turbine, an exhaust pipe of the low pressure cylinder and a water outlet of the steam-water separator, the circulation is carried out, cold molten salt after heat release flows back to the groove type solar heat collector at the outer top of the boiler through a pipeline, and the cold molten salt in the pipeline, the heating efficiency of slot type solar collector has been promoted.
Claims (1)
1. A photo-thermal-pulverized coal linkage coupling boiler comprises: the rotary disk is characterized in that: the rotary disc is arranged at the outer top of the boiler, a groove type solar thermal collector is arranged on the rotary disc and comprises a group of groove type paraboloidal mirrors and thermal-collecting tubes, solar tracking controllers are arranged on two sides of each groove type paraboloidal mirror, the groove type solar thermal collector is connected with an evaporator through a molten salt loop, and the evaporator is respectively connected with a water separation outlet of a steam-water separator and exhaust headers of a medium-pressure cylinder and a low-pressure cylinder of the steam turbine;
by additionally arranging a small evaporator at the side of the steam-water separator, high-temperature molten salt generated by the trough type solar heat collector secondarily heats water separated by the steam-water separator and exhaust gas of a medium-pressure cylinder and a low-pressure cylinder of a steam turbine in the evaporator to generate a secondary steam-water mixture, and the secondary steam-water mixture enters the steam-water separator again; the solar collector tube is characterized in that a nickel-based stainless tube is arranged inside the collector tube, a glass tube is arranged outside the nickel-based stainless tube, vacuum is formed between the nickel-based stainless tube and the glass tube, a light absorbing material is coated on the outer wall of the nickel-based stainless tube, and a working medium inside the nickel-based stainless tube is molten salt;
the steam-water separation method of the photo-thermal-pulverized coal linkage coupling boiler comprises the following steps: the groove type solar heat collector is arranged at the outer top of the boiler, the lower rotary disc rotates to the sun through the solar tracking controller, molten salt heated by the heat collecting tube enters an evaporator in the boiler, steam-water mixture discharged after a steam turbine intermediate pressure cylinder and a low pressure cylinder do work is directly secondarily heated, water separated by the steam-water separator is secondarily heated at the same time to generate secondary steam-water mixture, the secondary steam-water mixture and primary steam-water mixture from a header on a water wall enter the steam-water separator to be separated again, in order to prevent turbulent flow and vibration generated when two kinds of working media are converged, anti-hedging baffles are additionally arranged at the converging position of the two kinds of working media among a steam turbine, an exhaust pipe of the low pressure cylinder and a water outlet of the steam-water separator, the circulation is carried out, cold molten salt after heat release flows back to the groove type solar heat collector at the outer top of the boiler through a pipeline, and the cold molten salt in the pipeline, the heating efficiency of slot type solar collector has been promoted.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810433789.8A CN108679586B (en) | 2018-05-08 | 2018-05-08 | Photo-thermal-pulverized coal linkage coupling boiler and steam-water separation method |
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| CN201810433789.8A CN108679586B (en) | 2018-05-08 | 2018-05-08 | Photo-thermal-pulverized coal linkage coupling boiler and steam-water separation method |
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| CN108679586A CN108679586A (en) | 2018-10-19 |
| CN108679586B true CN108679586B (en) | 2020-06-12 |
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| CN111425849B (en) * | 2020-03-20 | 2022-02-08 | 哈尔滨锅炉厂有限责任公司 | Peak-shaving pulverized coal boiler with double-layer clean energy and pulverized coal coupled |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202100399U (en) * | 2011-06-27 | 2012-01-04 | 内蒙古电力勘测设计院 | Solar energy and common boiler combined power-generating and heating system |
| CN102828925A (en) * | 2012-08-29 | 2012-12-19 | 浙江中控太阳能技术有限公司 | Binary working medium tower type solar power generating system |
| CN103161702A (en) * | 2011-12-09 | 2013-06-19 | 西安大昱光电科技有限公司 | Solar heat multistage power generation system |
| CN105332865A (en) * | 2014-08-06 | 2016-02-17 | 烟台龙源电力技术股份有限公司 | Tower type solar energy and coal-fired boiler photo-thermal cogeneration system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7640746B2 (en) * | 2005-05-27 | 2010-01-05 | Markon Technologies, LLC | Method and system integrating solar heat into a regenerative rankine steam cycle |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202100399U (en) * | 2011-06-27 | 2012-01-04 | 内蒙古电力勘测设计院 | Solar energy and common boiler combined power-generating and heating system |
| CN103161702A (en) * | 2011-12-09 | 2013-06-19 | 西安大昱光电科技有限公司 | Solar heat multistage power generation system |
| CN102828925A (en) * | 2012-08-29 | 2012-12-19 | 浙江中控太阳能技术有限公司 | Binary working medium tower type solar power generating system |
| CN105332865A (en) * | 2014-08-06 | 2016-02-17 | 烟台龙源电力技术股份有限公司 | Tower type solar energy and coal-fired boiler photo-thermal cogeneration system |
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