CN111023063A - 200 MW-grade primary intermediate reheating subcritical circulating fluidized bed boiler and circulating method - Google Patents
200 MW-grade primary intermediate reheating subcritical circulating fluidized bed boiler and circulating method Download PDFInfo
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- CN111023063A CN111023063A CN201911215959.6A CN201911215959A CN111023063A CN 111023063 A CN111023063 A CN 111023063A CN 201911215959 A CN201911215959 A CN 201911215959A CN 111023063 A CN111023063 A CN 111023063A
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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
- F22B1/18—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B31/00—Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements of dispositions of combustion apparatus
- F22B31/0007—Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements of dispositions of combustion apparatus with combustion in a fluidized bed
- F22B31/0069—Systems therefor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B31/00—Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements of dispositions of combustion apparatus
- F22B31/08—Installation of heat-exchange apparatus or of means in boilers for heating air supplied for combustion
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C10/00—Fluidised bed combustion apparatus
- F23C10/02—Fluidised bed combustion apparatus with means specially adapted for achieving or promoting a circulating movement of particles within the bed or for a recirculation of particles entrained from the bed
- F23C10/04—Fluidised bed combustion apparatus with means specially adapted for achieving or promoting a circulating movement of particles within the bed or for a recirculation of particles entrained from the bed the particles being circulated to a section, e.g. a heat-exchange section or a return duct, at least partially shielded from the combustion zone, before being reintroduced into the combustion zone
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L15/00—Heating of air supplied for combustion
- F23L15/02—Arrangements of regenerators
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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
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Abstract
The invention relates to a 200MW grade primary intermediate reheating subcritical circulating fluidized bed boiler and a circulating method. The medium and small circulating fluidized bed boiler below 300MW level is generally in the pressure level below ultrahigh pressure, and the low main steam pressure limits the further reduction of the coal consumption of power generation. The invention comprises the following components: furnace (1), separator (2), afterbody flue (3), furnace respectively through separator entry flue (21) with the separator connect, the separator pass through separator export flue (20) and be connected with the afterbody flue, afterbody flue top arranged medium temperature over heater I (8), low temperature re-heater (10), low temperature over heater (9) in proper order, afterbody flue middle part set up temperature regulation baffle (11), temperature regulation baffle below install economizer (12), economizer below installation tubular air heater (13). The invention is used for a 200MW grade primary intermediate reheating subcritical circulating fluidized bed boiler.
Description
The technical field is as follows:
the invention relates to a 200MW grade primary intermediate reheating subcritical circulating fluidized bed boiler and a circulating method.
Background art:
the medium and small circulating fluidized bed boiler below 300MW level is generally in the pressure level below ultrahigh pressure, and the low main steam pressure limits the further reduction of the coal consumption of power generation. In order to improve the generating efficiency of the unit and realize high parameterization of the small and medium-sized units, a 200MW grade primary intermediate reheating subcritical circulating fluidized bed boiler is developed, the main steam pressure of the small and medium-sized units is firstly improved to 17.4MPa subcritical grade, the generating efficiency of the unit is improved, and meanwhile, the combustion air of the boiler can completely adopt industrial waste gas and plays an important role in purifying toxic components in the industrial waste gas.
The invention content is as follows:
the invention aims to provide a 200MW grade primary intermediate reheating subcritical circulating fluidized bed boiler and a circulating method, which mainly improve the economy of small and medium-sized units by improving main steam parameters, and improve the environmental protection performance by adopting industrial waste gas as all combustion air.
The above purpose is realized by the following technical scheme:
a 200MW class single intermediate reheat subcritical circulating fluidized bed boiler comprising: furnace, separator, afterbody flue, characterized by: furnace respectively through separator entry flue with the separator connect, the separator pass through separator export flue and be connected with the afterbody flue, afterbody flue top arranged medium temperature over heater I, low temperature re-heater, low temperature over heater in proper order, afterbody flue middle part set up the baffle that adjusts the temperature, the baffle below that adjusts the temperature install the economizer, economizer below installation tubular air heater, furnace in set up water-cooling screen, high temperature over heater screen, high temperature re-heater screen respectively, high temperature re-heater screen below install medium temperature over heater II, the separator adopt 2 high-efficient air-cooled separators and install self-balancing double-circuit feed back valve in its bottom.
200MW grade once middle reheat subcritical circulating fluidized bed boiler, furnace below install secondary annular bellows, secondary annular bellows be connected with hot secondary air duct, furnace bottom installation hot primary air duct, the water-cooling screen pass through the pipeline and be connected with the steam pocket, high temperature superheater screen pass through the pipeline and be connected with main steam pipe, high temperature reheater screen pass through the pipeline and be connected with main reheat steam pipe.
A200 MW grade primary intermediate reheating subcritical circulating fluidized bed boiler and a circulating method thereof comprise the following steps: firstly, the parameter of main steam of the circulating fluidized bed boiler is 17.4MPa, the temperature of the main steam is 540 ℃, a hearth is arranged at the front part, a separator is arranged at the middle part, a flue is arranged at the tail part, and a water screen, a high-temperature superheater screen and a high-temperature reheater screen are arranged in the hearth; the separator adopts 2 high-efficiency air-cooled separators, the lower part of the separator adopts a self-balancing two-way material return valve, the tail part of the separator adopts double flues and is surrounded by a membrane type wall-wrapped superheater, the front flue is provided with a low-temperature reheater, the rear flue is provided with a medium-temperature superheater and a low-temperature superheater, the bottoms of the front flue and the rear flue are provided with baffles, and an economizer and a tubular air preheater are arranged below the baffles;
the specific cycle is that industrial waste gas firstly enters a tubular air preheater for heating, and a part of the waste gas enters a water-cooled air chamber at the bottom of a hearth through a primary hot air duct and enters the hearth through an air distribution plate; a part of waste gas enters a furnace chamber conical section through a hot secondary air channel and enters a furnace chamber in two layers; in order to prevent industrial waste gas from leaking, all sealing air adopts high-pressure fluidized air, the air source of the high-pressure fluidized air is from the atmosphere, the waste gas entering a hearth and the flue gas generated by the combustion of the coal fed into the front wall sequentially pass through the hearth, a separator and a tail flue, and are discharged out of a boiler after heat exchange;
the feed water enters the economizer to be heated, then enters the water cooling wall and the water cooling screen, the generated saturated steam enters the air cooling separator, the low-temperature superheater, the medium-temperature superheater and the high-temperature superheater in sequence, finally enters the main steam pipeline to be led out from the front of the furnace, the low-temperature reheated steam enters the low-temperature reheater and the high-temperature reheater in sequence, finally enters the main reheated steam pipeline to be led out from the front of the furnace.
Has the advantages that:
1. the invention relates to a 200MW grade primary intermediate reheating subcritical circulating fluidized bed boiler and a circulating method thereof, the structure improves 200MW boiler parameters to subcritical grade, the generating efficiency of a unit is improved, industrial waste gas can be completely adopted by the boiler as combustion air, chemical waste gas is purified, and atmospheric pollution is reduced.
In order to improve the generating efficiency of the unit and realize high parameterization of small and medium-sized units, the invention develops the 200MW grade primary intermediate reheating subcritical circulating fluidized bed boiler, the main steam pressure of the small and medium-sized units is firstly improved to 17.4MPa subcritical grade, the generating efficiency of the unit is improved, and meanwhile, the combustion air of the boiler can completely adopt industrial waste gas and plays an important role in purifying toxic components in the industrial waste gas.
Description of the drawings:
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a top view of fig. 1.
The specific implementation mode is as follows:
example 1:
a 200MW class single intermediate reheat subcritical circulating fluidized bed boiler comprising: furnace 1, separator 2, afterbody flue 3, furnace pass through separator entry flue 21 respectively with the separator connect, the separator pass through separator export flue 20 and the afterbody flue is connected, afterbody flue top arranged in proper order medium temperature over heater I8, low temperature re-heater 10, low temperature over heater 9, afterbody flue middle part set up temperature regulation baffle 11, temperature regulation baffle below install economizer 12, economizer below installation tubular air heater 13, furnace in set up water-cooling screen 4, high temperature over heater screen 6, high temperature re-heater screen 5 respectively, high temperature re-heater screen below install medium temperature over heater II17, the separator adopt 2 high-efficient gas-cooled separators and install self-balancing double-circuit feed back valve 7 in its bottom.
Example 2:
according to embodiment 1 the 200MW grade once intermediate reheating subcritical circulating fluidized bed boiler, furnace below install secondary annular bellows 16, secondary annular bellows be connected with hot secondary air duct 15, furnace bottom install hot primary air duct 14, the water screen pass through the pipeline and be connected with steam drum 22, high temperature superheater screen pass through the pipeline and be connected with main steam pipe 19, high temperature reheater screen pass through the pipeline and be connected with main reheat steam pipe 18.
Example 3:
a recycling method using the 200MW class primary intermediate reheat subcritical circulating fluidized bed boiler of examples 1-2, the method comprising the steps of: firstly, the parameter of main steam of the circulating fluidized bed boiler is 17.4MPa, the temperature of the main steam is 540 ℃, a hearth is arranged at the front part, a separator is arranged at the middle part, a flue is arranged at the tail part, and a water screen, a high-temperature superheater screen and a high-temperature reheater screen are arranged in the hearth; the separator adopts 2 high-efficiency air-cooled separators, the lower part of the separator adopts a self-balancing two-way material return valve, the tail part of the separator adopts double flues and is surrounded by a membrane type wall-wrapped superheater, the front flue is provided with a low-temperature reheater, the rear flue is provided with a medium-temperature superheater and a low-temperature superheater, the bottoms of the front flue and the rear flue are provided with baffles, and an economizer and a tubular air preheater are arranged below the baffles;
the specific cycle is that industrial waste gas firstly enters a tubular air preheater for heating, and a part of the waste gas enters a water-cooled air chamber at the bottom of a hearth through a primary hot air duct and enters the hearth through an air distribution plate; a part of waste gas enters a furnace chamber conical section through a hot secondary air channel and enters a furnace chamber in two layers; in order to prevent industrial waste gas from leaking, all sealing air adopts high-pressure fluidized air, the air source of the high-pressure fluidized air is from the atmosphere, the waste gas entering a hearth and the flue gas generated by the combustion of the coal fed into the front wall sequentially pass through the hearth, a separator and a tail flue, and are discharged out of a boiler after heat exchange;
the feed water enters the economizer to be heated, then enters the water cooling wall and the water cooling screen, the generated saturated steam enters the air cooling separator, the low-temperature superheater, the medium-temperature superheater and the high-temperature superheater in sequence, finally enters the main steam pipeline to be led out from the front of the furnace, the low-temperature reheated steam enters the low-temperature reheater and the high-temperature reheater in sequence, finally enters the main reheated steam pipeline to be led out from the front of the furnace.
The furnace hearth deslagging system adopts two points at the bottom of the furnace to carry out deslagging, and a roller slag cooler is used, and a water-cooling slag salvaging device is connected below an ash bucket at the bottom of the high-temperature down flue and the medium-temperature up flue.
Claims (3)
1. A 200MW class single intermediate reheat subcritical circulating fluidized bed boiler comprising: furnace, separator, afterbody flue, characterized by: furnace respectively through separator entry flue with the separator connect, the separator pass through separator export flue and be connected with the afterbody flue, afterbody flue top arranged medium temperature over heater I, low temperature re-heater, low temperature over heater in proper order, afterbody flue middle part set up the baffle that adjusts the temperature, the baffle below that adjusts the temperature install the economizer, economizer below installation tubular air heater, furnace in set up water-cooling screen, high temperature over heater screen, high temperature re-heater screen respectively, high temperature re-heater screen below install medium temperature over heater II, the separator adopt 2 high-efficient air-cooled separators and install self-balancing double-circuit feed back valve in its bottom.
2. The 200MW class single intermediate reheat subcritical circulating fluidized bed boiler of claim 2, characterized by: furnace below install secondary annular bellows, secondary annular bellows be connected with hot secondary air duct, furnace bottom installation hot primary air duct, the water-cooling screen pass through the pipeline and be connected with the steam pocket, high temperature superheater screen pass through the pipeline and be connected with main steam pipe, high temperature reheater screen pass through the pipeline and be connected with main reheat steam pipe.
3. A recycling method using the 200MW class primary intermediate reheat subcritical circulating fluidized bed boiler according to any one of claims 1 to 2, characterized by: the method comprises the following steps:
firstly, the parameter of main steam of the circulating fluidized bed boiler is 17.4MPa, the temperature of the main steam is 540 ℃, a hearth is arranged at the front part, a separator is arranged at the middle part, a flue is arranged at the tail part, and a water screen, a high-temperature superheater screen and a high-temperature reheater screen are arranged in the hearth; the separator adopts 2 high-efficiency air-cooled separators, the lower part of the separator adopts a self-balancing two-way material return valve, the tail part of the separator adopts double flues and is surrounded by a membrane type wall-wrapped superheater, the front flue is provided with a low-temperature reheater, the rear flue is provided with a medium-temperature superheater and a low-temperature superheater, the bottoms of the front flue and the rear flue are provided with baffles, and an economizer and a tubular air preheater are arranged below the baffles;
the specific cycle is that industrial waste gas firstly enters a tubular air preheater for heating, and a part of the waste gas enters a water-cooled air chamber at the bottom of a hearth through a primary hot air duct and enters the hearth through an air distribution plate; a part of waste gas enters a furnace chamber conical section through a hot secondary air channel and enters a furnace chamber in two layers; in order to prevent industrial waste gas from leaking, all sealing air adopts high-pressure fluidized air, the air source of the high-pressure fluidized air is from the atmosphere, the waste gas entering a hearth and the flue gas generated by the combustion of the coal fed into the front wall sequentially pass through the hearth, a separator and a tail flue, and are discharged out of a boiler after heat exchange;
the feed water enters the economizer to be heated, then enters the water cooling wall and the water cooling screen, the generated saturated steam enters the air cooling separator, the low-temperature superheater, the medium-temperature superheater and the high-temperature superheater in sequence, finally enters the main steam pipeline to be led out from the front of the furnace, the low-temperature reheated steam enters the low-temperature reheater and the high-temperature reheater in sequence, finally enters the main reheated steam pipeline to be led out from the front of the furnace.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911215959.6A CN111023063A (en) | 2019-12-02 | 2019-12-02 | 200 MW-grade primary intermediate reheating subcritical circulating fluidized bed boiler and circulating method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911215959.6A CN111023063A (en) | 2019-12-02 | 2019-12-02 | 200 MW-grade primary intermediate reheating subcritical circulating fluidized bed boiler and circulating method |
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| CN111023063A true CN111023063A (en) | 2020-04-17 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101968215A (en) * | 2010-11-17 | 2011-02-09 | 上海锅炉厂有限公司 | Arrangement structure of subcritical circulating fluidized bed boiler |
| CN102777896A (en) * | 2012-07-05 | 2012-11-14 | 哈尔滨锅炉厂有限责任公司 | Device for fixing temperature-adjusting baffle of tail portion flue of circulating fluid bed (CFB) boiler and temperature-adjusting method |
| CN103017153A (en) * | 2012-12-26 | 2013-04-03 | 哈尔滨锅炉厂有限责任公司 | 300MW subcritical circulating fluidized bed boiler and working method |
| CN202993180U (en) * | 2012-12-26 | 2013-06-12 | 哈尔滨锅炉厂有限责任公司 | 300MW subcritical circulating fluidized bed boiler |
| CN204419282U (en) * | 2014-12-31 | 2015-06-24 | 冯伟忠 | A kind of high temperature Subcritical Units |
-
2019
- 2019-12-02 CN CN201911215959.6A patent/CN111023063A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101968215A (en) * | 2010-11-17 | 2011-02-09 | 上海锅炉厂有限公司 | Arrangement structure of subcritical circulating fluidized bed boiler |
| CN102777896A (en) * | 2012-07-05 | 2012-11-14 | 哈尔滨锅炉厂有限责任公司 | Device for fixing temperature-adjusting baffle of tail portion flue of circulating fluid bed (CFB) boiler and temperature-adjusting method |
| CN103017153A (en) * | 2012-12-26 | 2013-04-03 | 哈尔滨锅炉厂有限责任公司 | 300MW subcritical circulating fluidized bed boiler and working method |
| CN202993180U (en) * | 2012-12-26 | 2013-06-12 | 哈尔滨锅炉厂有限责任公司 | 300MW subcritical circulating fluidized bed boiler |
| CN204419282U (en) * | 2014-12-31 | 2015-06-24 | 冯伟忠 | A kind of high temperature Subcritical Units |
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Application publication date: 20200417 |