CN202403249U - 350MW supercritical tower type lignite boiler - Google Patents
350MW supercritical tower type lignite boiler Download PDFInfo
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- CN202403249U CN202403249U CN2011205397531U CN201120539753U CN202403249U CN 202403249 U CN202403249 U CN 202403249U CN 2011205397531 U CN2011205397531 U CN 2011205397531U CN 201120539753 U CN201120539753 U CN 201120539753U CN 202403249 U CN202403249 U CN 202403249U
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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
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Abstract
The utility model discloses a 350MW supercritical tower type lignite boiler. The conventional medium-speed pulverization system cannot meet the requirements of lignite combustion; and for the safe and stable running of the boiler, the adoption of a fan pulverization system is required, and the adoption of a boiler flue gas as a pulverization drying agent is also required. The 350MW supercritical tower type lignite boiler comprises a boiler body (1). A water cooled wall (2) is arranged on an outer circle of the boiler body, is connected with an air preheater (12) through a flue, and is connected with a water storage tank (5) through a vapor-water separator (4). A separated over fire air (SOFA) combustor (13) and a main combustor (14) are arranged on the lower part of the water cooled wall. An economizer (6), a low-temperature reheater (7), a secondary overheater (8), a high-temperature reheater (9), a final overheater (10) and a primary overheater (11) are sequentially arranged in the water cooled wall from top to bottom. The economizer is connected with the water cooled wall. The water cooled wall is connected with the separator. The separator is connected with the primary overheater. The primary overheater is connected with the secondary overheater. The secondary overheater is connected with the final overheater. The low-temperature reheater is connected with the high-temperature reheater. The utility model is used for the 350MW supercritical tower type lignite boiler.
Description
Technical field:
the utility model relates to the overcritical tower boiler using brown coal of a kind of 350MW.
Background technology:
are burning high-moisture, high volatile, low-calorie brown coal at present; Conventional medium-speed pulverizer pulverized coal preparation system can not satisfy the requirement of brown coal burning; Must adopt fanned powder-grinding system; Adopt boiler smoke as the powder process drier, could guarantee boiler safety, stable operation.
are owing to China's brown coal are stored mainly in the Inner Mongol; Concentrate in the mining area; Therefore reserves are big, and major part is suitable for strip mining transformation, in the area, Inner Mongol and to accelerate to build the big capacity of large-scale brown coal power station be imperative in the surrounding area; So both made full use of lignite resource; Avoided brown coal long-distance transports to bring safety problem, reduce cost of electricity-generating greatly and promoted the economic development in area, Inner Mongol and peripheral province, and superfluous electric power can have been transported to the areas such as south of capital, Tianjin Tang, North China and power shortages continually.
Summary of the invention:
The purpose of
the utility model provides a kind of efficient that can make and improves about 1.5%, and power plant efficiency improves about 0.59%, and net coal consumption rate reduces the overcritical tower boiler using brown coal of 350MW about 4.23 g/kw.h.
Above-mentioned purpose realizes through following technical scheme:
The overcritical tower boiler using brown coal of
a kind of 350MW, its composition comprises: body of heater, water-cooling wall is equipped with in described body of heater outer ring; Described cold water wall connects air preheater through flue; Described cold water wall connects storage tank through steam-water separator, and burner is equipped with in described cold water wall bottom, and described cold water pars intramuralis is furnished with economizer, low-temperature reheater, two-stage superheater, high temperature reheater, finishing superheater, primary superheater from top to bottom successively; Described economizer connects water-cooling wall; Described water-cooling wall connects separator, and described separator connects primary superheater, and described primary superheater connects two-stage superheater; Described two-stage superheater connects finishing superheater, and described low-temperature reheater connects high temperature reheater.
The overcritical tower boiler using brown coal of
described 350MW; Described flue comprises the furnace outlet flue; Described furnace outlet flue connects the preheater gas approach, and described preheater gas approach connects air preheater, and described burner has SOFA burner and main burner; Described air preheater is contained on the steel construction of boiler organ timbering, and described cold water wall comprises vertical tube coil cold water wall and spirally-wound tubes cold water wall.
The overcritical tower boiler using brown coal of
described 350MW; Described burner adopts big bellows structure; By dividing plate described big bellows are separated into some air compartments, arrange the described burner nozzle that quantity does not wait in the exit of described each bellows; Described burner arrangement is on the four sides wall of furnace wall cooling; Be hexagonal or anistree the layout; Pressure-containing parts all is suspended on the big plate-girder, and described big plate-girder is supported by four main frames, and rotary regenerative air preheater is installed on the steel construction of the main boiler organ timbering of linking the back; Described body of heater ground shape is a square, is made up of four vertical main frames; Boiler setting couples together through horizontal arrangement rigidity beam, fixes through vertical rigidity beam simultaneously.
Beneficial effect:
Big bellows structure is adopted in
1. the burner of the utility model, by dividing plate big bellows is separated into some air compartments, arranges the burner nozzle that quantity does not wait in the exit of each bellows.Burner arrangement is hexagonal or anistree the layout on the four sides wall of furnace wall cooling.
The boiler pressure-containing parts of
tower layout of the utility model all is suspended on the big plate-girder, and these big plate-girders are supported by four main frames.Rotary regenerative air preheater is installed on the steel construction of the main boiler organ timbering of linking the back; Whole boiler also is further strengthened with vertical rigidity beam through the structure of boiler self; Boiler structure is a three-dimensional structure, and ground shape is a square, mainly is made up of four vertical main frames; Boiler setting couples together through horizontal arrangement rigidity beam, and fixing through vertical rigidity beam simultaneously is that the mechanism of boiler is more safe and reliable.
One of them index of the safe operation of the unit of
the utility model is exactly whether heating surface moves safety; The overcritical tower boiler of direct current particularly; Because the arrangement of heating surface, high-temperature surface is in flue-gas temperature than higher zone.Therefore, rationally being chosen in the boiler design of boiler heating surface is particularly important, but the mainly dependence calculation of Wall Temperature program of choosing at present of boiler heating surface.
the utility model is the independent research design of my unit, adopts autonomous intellectual property fully, shape become the exclusive boiler structure form of a cover, special burner structure and the system of safe and stable operation.This product has good social effect and market potential, is domestic first platform, product advanced in the world.
the utility model is compared with postcritical bituminous coal fired boiler, and the efficient of boiler improves about 1.5%, and power plant efficiency improves about 0.59%, and net coal consumption rate reduces about 4.23 g/kw.h.With respect to subcritical boiler using brown coal, efficient, the boiler efficiency of power plant improve greatly, and net coal consumption rate reduces greatly.
The utility model is under the situation of denitrification apparatus that puts into operation, and the NOx discharge capacity can reach 200mg/Nm
3
Standard, in similar unit, maintain the leading position.With respect to Subcritical Units, consider the processing and the freight charges of SO2 and NOX discharging fine and lime-ash, nearly can save about 2,500,000 every year.
The utility model is for economic benefit and social benefit, if unit operation 1 year, can the fuel savings expense with respect to Subcritical Units about 3,000 ten thousand yuan,
Horizontal arrangement is all adopted in
8. the boiler superheater and the reheater of the utility model, has realized having accelerated start-up time simultaneously from hydrophobic function; The heating surface material class of super critical boiler provides, and guarantees the heating surface security of operation, and the material of pressure containing part adopts production domesticization simultaneously, lowers the boiler design cost; Aspect burner design, used the hexagonal of joining fanned powder-grinding system or the anistree tangential firing technology of breathing out the pot independent research, improve the adaptability of boiler to brown coal; The design of high temperature smoking pipeline, economizer exit flue reasonable in design arranged simply, reduced the resistance of fume side, simplified the layout of hanging of back-end ductwork simultaneously.No boiler water circulating pump starts successfully, and this startup flow all is in reduced levels in the super critical boiler of capacity, ultra-supercritical boiler, has reduced the water consumption when starting so greatly.
the utility model adopts layout and the boiler operatiopn aspect in novel heating surface layout, the application of heating surface material, burner arrangement, cigarette air channel and has stronger coal and unit capacity adaptability; Heating surface specifications at different levels and heat absorption ratio are reasonable, and structure realizes easily.
Description of drawings:
accompanying drawing 1 is the mouth structure sketch map of this product.
accompanying drawing 2 is accompanying drawing 1 an overall plan structure sketch map.
accompanying drawing 3 is the enlarged drawing of burner in the accompanying drawing 1.
The specific embodiment:
Embodiment 1:
The overcritical tower boiler using brown coal of
a kind of 350MW; Its composition comprises: body of heater 1, and water-cooling wall 2 is equipped with in described body of heater outer ring, and described cold water wall connects air preheater 12 through flue; Described cold water wall connects storage tank 5 through steam-water separator 4; SOFA burner 13 and main burner 14 are equipped with in described cold water wall bottom, and described cold water pars intramuralis is furnished with economizer 6, low-temperature reheater 7, two-stage superheater 8, high temperature reheater 9, finishing superheater 10, primary superheater 11 from top to bottom successively, and described economizer connects water-cooling wall; Described water-cooling wall connects separator; Described separator connects primary superheater, and described primary superheater connects two-stage superheater, and described low-temperature reheater connects high temperature reheater.
Embodiment 2:
The overcritical tower boiler using brown coal of
described 350MW; Described flue comprises furnace outlet flue 15; Described furnace outlet flue connects preheater gas approach 3, and described preheater gas approach connects air preheater 12, and described burner has SOFA burner 13 and main burner 14; Described air preheater is contained on the steel construction of boiler organ timbering, and described cold water wall 2 comprises vertical tube coil cold water wall and spirally-wound tubes cold water wall.
Embodiment 3:
embodiment 1 or the overcritical tower boiler using brown coal of 2 described 350MW; Described burner adopts big bellows structure; By dividing plate described big bellows are separated into some air compartments, arrange the described burner nozzle that quantity does not wait in the exit of described each bellows; Described burner arrangement is on the four sides wall of furnace wall cooling; Be hexagonal or anistree the layout; Pressure-containing parts all is suspended on the big plate-girder, and described big plate-girder is supported by four main frames, and rotary regenerative air preheater is installed on the steel construction of the main boiler organ timbering of linking the back; Described body of heater ground shape is a square, is made up of four vertical main frames; Boiler setting couples together through horizontal arrangement rigidity beam, fixes through vertical rigidity beam simultaneously.
The overcritical tower boiler using brown coal of 350MW that
are above-mentioned; Foundation is from actual requirement of engineering; Rely on proprietary technology to develop the tower super critical boiler that the 350MW grade uses brown coal, air distribution fan mill fully, this type of furnace is mainly used in the brown coal unit of burning high-moisture.Require special research and development for satisfying Utilities Electric Co.'s " energy-saving and emission-reduction ", have good social effect and market potential, be domestic first platform, product advanced in the world.
The boiler hydrodynamics research and development
According to the characteristics that the tower boiler water-cooling wall is arranged, water-cooling wall is studied from the following aspects:
1) the multistage uneven loop flow distribution calculation method of being heated has been proposed;
2) worked out water-cooling wall Calculation of Hydrodynamic program;
3) having accomplished the hydrodynamic characterisitic under the different circuit calculates;
4) study the steam temperature that water-cooling wall exports under the different operating modes and distributed, managed interior quality velocity flow profile, drooping characteristic and wall temperature characteristic;
5) hydrodynamic ambiguity under the underrun is analyzed.
to the design feature of tower boiler burner hearth, were developed the Calculation of Hydrodynamic program, and each design conditions have been checked in the hydrodynamic while of research, guaranteed that hydrodynamic force is safe and reliable.
Claims (3)
1. overcritical tower boiler using brown coal of 350MW, its composition comprises: body of heater is characterized in that: water-cooling wall is equipped with in described body of heater outer ring; Described cold water wall connects air preheater through flue; Described cold water wall connects storage tank through steam-water separator, and burner is equipped with in described cold water wall bottom, and described cold water pars intramuralis is furnished with economizer, low-temperature reheater, two-stage superheater, high temperature reheater, finishing superheater, primary superheater from top to bottom successively; Described economizer connects water-cooling wall; Described water-cooling wall connects separator, and described separator connects primary superheater, and described primary superheater connects two-stage superheater; Described two-stage superheater connects finishing superheater, and described low-temperature reheater connects high temperature reheater.
2. the overcritical tower boiler using brown coal of 350MW according to claim 1; It is characterized in that: described flue comprises the furnace outlet flue; Described furnace outlet flue connects the preheater gas approach, and described preheater gas approach connects air preheater, and described burner has SOFA burner and main burner; Described air preheater is contained on the steel construction of boiler organ timbering, and described cold water wall comprises vertical tube coil cold water wall and spirally-wound tubes cold water wall.
3. the overcritical tower boiler using brown coal of 350MW according to claim 1 and 2; It is characterized in that: described burner adopts big bellows structure; By dividing plate described big bellows are separated into some air compartments, arrange the described burner nozzle that quantity does not wait in the exit of described each bellows; Described burner arrangement is on the four sides wall of furnace wall cooling; Be hexagonal or anistree the layout; Pressure-containing parts all is suspended on the big plate-girder, and described big plate-girder is supported by four main frames, and rotary regenerative air preheater is installed on the steel construction of the main boiler organ timbering of linking the back; Described body of heater ground shape is a square, is made up of four vertical main frames; Boiler setting couples together through horizontal arrangement rigidity beam, fixes through vertical rigidity beam simultaneously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205397531U CN202403249U (en) | 2011-12-21 | 2011-12-21 | 350MW supercritical tower type lignite boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205397531U CN202403249U (en) | 2011-12-21 | 2011-12-21 | 350MW supercritical tower type lignite boiler |
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| Publication Number | Publication Date |
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| CN202403249U true CN202403249U (en) | 2012-08-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205397531U Expired - Lifetime CN202403249U (en) | 2011-12-21 | 2011-12-21 | 350MW supercritical tower type lignite boiler |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102434870A (en) * | 2011-12-21 | 2012-05-02 | 哈尔滨锅炉厂有限责任公司 | 350MW supercritical tower-type lignite boiler |
| CN104266204A (en) * | 2014-10-25 | 2015-01-07 | 哈尔滨锅炉厂有限责任公司 | High temperature flue gas extraction device coking preventing arrangement structure and arrangement method |
| CN108571719A (en) * | 2018-06-29 | 2018-09-25 | 哈尔滨锅炉厂有限责任公司 | A kind of tower watering temperature adjustment boiler using brown coal of large-capacity ultra-supercritical with fan mill |
| CN114935158A (en) * | 2022-05-16 | 2022-08-23 | 东方电气集团东方锅炉股份有限公司 | Boiler furnace and system with steam cooling wall |
-
2011
- 2011-12-21 CN CN2011205397531U patent/CN202403249U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102434870A (en) * | 2011-12-21 | 2012-05-02 | 哈尔滨锅炉厂有限责任公司 | 350MW supercritical tower-type lignite boiler |
| CN104266204A (en) * | 2014-10-25 | 2015-01-07 | 哈尔滨锅炉厂有限责任公司 | High temperature flue gas extraction device coking preventing arrangement structure and arrangement method |
| CN104266204B (en) * | 2014-10-25 | 2017-05-03 | 哈尔滨锅炉厂有限责任公司 | High temperature flue gas extraction device coking preventing arrangement structure and arrangement method |
| CN108571719A (en) * | 2018-06-29 | 2018-09-25 | 哈尔滨锅炉厂有限责任公司 | A kind of tower watering temperature adjustment boiler using brown coal of large-capacity ultra-supercritical with fan mill |
| CN114935158A (en) * | 2022-05-16 | 2022-08-23 | 东方电气集团东方锅炉股份有限公司 | Boiler furnace and system with steam cooling wall |
| CN114935158B (en) * | 2022-05-16 | 2023-05-26 | 东方电气集团东方锅炉股份有限公司 | Boiler furnace and system with steam cooling wall |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120829 |