CN202452468U - 670MW supercritical tower type lignite boiler - Google Patents
670MW supercritical tower type lignite boiler Download PDFInfo
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- CN202452468U CN202452468U CN2012200331316U CN201220033131U CN202452468U CN 202452468 U CN202452468 U CN 202452468U CN 2012200331316 U CN2012200331316 U CN 2012200331316U CN 201220033131 U CN201220033131 U CN 201220033131U CN 202452468 U CN202452468 U CN 202452468U
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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 relates to a 670MW supercritical tower type lignite boiler. The acceleration of the construction of large-scale lignite high-capacity power stations in Inner Mongolia and surrounding areas in China is imperative. The 670MW supercritical tower type lignite boiler comprises a tower arrangement furnace body (1), wherein a water cooled wall (11) is arranged on the outer circle of the furnace wall, is connected with an air preheater (16) through a flue, and is connected with a water storage tank (7) through a steam-water separator (9); a burner is arranged on four walls on the inner side of the water cooled wall; a coal economizer (3), a low-temperature reheater (2), a second-stage over-heater (5), a high-temperature reheater (6), a last-stage over-heater (4) and a first-stage over-heater (8) are arranged in the water cooled wall in sequence from top to bottom; the coal economizer is connected with the water cooled wall; the water cooled wall is connected with the separator; the separator is connected with the first-stage over-heater; the first-stage over-heater is connected with the second-stage over-heater; the second-stage over-heater is connected with the last-stage over-heater; and the low-temperature reheater is connected with the high-temperature reheater. The structure is applied to the supercritical tower type lignite boiler.
Description
Technical field:
the utility model relates to the overcritical tower boiler using brown coal of a kind of 670MW.
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.
since China brown coal storage mainly in the Inner Mongol, concentrate in the mining area, reserves are big, major part is suitable for strip mining transformation, therefore 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.
Summary of the invention:
The purpose of
the utility model provides a kind of overcritical tower boiler using brown coal of 670MW with main burner of big bellows structure.
Above-mentioned purpose realizes through following technical scheme:
The overcritical tower boiler using brown coal of
670MW, its composition comprises: the body of heater of tower layout, described body of heater outer ring tool water-cooling wall; Described water-cooling wall connects air preheater through flue; Described water-cooling wall connects storage tank through steam-water separator, and burner is installed on the inboard four sides wall of described water-cooling wall, and described water-cooling wall inside 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 670MW; Described flue comprises the furnace outlet flue; Described furnace outlet flue connects the preheater gas approach; Described preheater gas approach is equipped with air preheater in connecting, and described primary superheater, two-stage superheater and finishing superheater and low-temperature reheater, high temperature reheater all adopt horizontal arrangement.
The overcritical tower boiler using brown coal of
described 670MW, described burner comprises SOFA burner and main burner, described water-cooling wall comprises vertical tube coil water-cooling wall and Spiral Coil Waterwall.
The overcritical tower boiler using brown coal of
described 670MW, described main burner adopts big bellows structure, by dividing plate big bellows is separated into each air compartment; Burner nozzle is arranged in exit at each bellows; Burner arrangement is on the four sides wall of furnace wall cooling, and the anise that is anistree tangential firing is arranged, descends three groups during burner branch in every angle is last; Amount to 40 burners, coal burner is SOFA burner, the sandwich wind formula of wide regulating ratio low-NOx combustor.
The overcritical tower boiler using brown coal of
described 670MW, the body of heater pressure-containing parts of described tower layout all is suspended on the big plate-girder, and these big plate-girders are to be supported by the main frame that four profiles are 2500X2500mm; Rotary regenerative air preheater is installed on the steel construction of main boiler organ timbering of back; 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, fixes through vertical rigidity beam simultaneously.
Beneficial effect:
1. the utility model are applied to the Inner Mongol and had both made full use of lignite resource; Avoided the brown coal long-distance transport 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 transport to the areas such as south of capital, Tianjin Tang, North China and power shortages continually.
the utility model has satisfied that Utilities Electric Co.'s " energy-saving and emission-reduction " requires and special research and development, has good social effect and market potential, is domestic first platform, product advanced in the world.
the utility model is not owing to itself have back-end ductwork, thus all heating surfaces all arrange with burner hearth in, and every grade of heating surface all adopts horizontal arrangement.Simultaneously, in order to satisfy the swing pipe of heating surface, from the furnace outlet to the economizer exit, the transverse pitch of every grade of heating surface reduces at double.According to the design heat absorption requirement of every grade of heating surface, breathe out pot and on the layout of superheater, reheater, reasonably arrange, guaranteed the security of operation of heating surface.
postcritical boiler using brown coal of the utility model is compared with postcritical bituminous coal fired boiler, and the efficient difference of boiler is about 1.5%, and the power plant efficiency difference is about about 0.59%, about about 4.23 g/kw.h of net coal consumption rate difference.With respect to subcritical boiler using brown coal, the efficient of power plant, boiler efficiency, net coal consumption rate reduce greatly.
the utility model is through finding out the comparison of polluting dirty discharge capacity, and under the situation of denitrification apparatus that puts into operation, the NOx discharge capacity of this engineering can reach the standard of 218.4mg/Nm3, in similar unit, maintains 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 5,000,000 every year.
the utility model is for economic benefit and social benefit, and unit operation 1 year can the fuel savings expense with respect to Subcritical Units about 5,670 ten thousand yuan.
the utility model boiler superheater and reheater all adopt horizontal arrangement, have 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 anistree tangential firing technology of joining fanned powder-grinding system of breathing out the pot independent research, improve the adaptability of boiler to brown coal, solved the historical difficult problem that China a large amount of brown coal can not be used for large-sized boiler; 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.
Description of drawings:
accompanying drawing 1 is the structural representation of this product.
accompanying drawing 2 is the horizontal view of this product.
The specific embodiment:
Embodiment 1:
The overcritical tower boiler using brown coal of
a kind of 670MW, its composition comprises: the body of heater 1 of tower layout, body of heater outer ring tool water-cooling wall 11; Water-cooling wall connects air preheater 16 through flue; Water-cooling wall connects storage tank 7 through steam-water separator 9, and burner is installed on the inboard four sides wall of water-cooling wall, and water-cooling wall inside is furnished with economizer 3, low-temperature reheater 2, two-stage superheater 5, high temperature reheater 6, finishing superheater 4, primary superheater 8 from top to bottom successively; Economizer connects water-cooling wall; Water-cooling wall connects separator, and separator connects primary superheater, and primary superheater connects two-stage superheater; Two-stage superheater connects finishing superheater, and low-temperature reheater connects high temperature reheater.
Embodiment 2:
The overcritical tower boiler using brown coal of
embodiment 1 described 670MW; Described flue comprises furnace outlet flue 14; Described furnace outlet flue connects preheater gas approach 15; Described preheater gas approach is equipped with air preheater in connecting, and described primary superheater, two-stage superheater and finishing superheater and low-temperature reheater, high temperature reheater all adopt horizontal arrangement.
Embodiment 3:
The overcritical tower boiler using brown coal of 670MW that
are above-mentioned, described burner comprise SOFA burner 12 and main burner 13.
Embodiment 4:
The overcritical tower boiler using brown coal of 670MW that
are above-mentioned, described water-cooling wall comprises vertical tube coil water-cooling wall and Spiral Coil Waterwall.
Embodiment 5:
The overcritical tower boiler using brown coal of 670MW that
are above-mentioned, described main burner adopts big bellows structure, by dividing plate big bellows is separated into each air compartment; Burner nozzle is arranged in exit at each bellows; Burner arrangement is on the four sides wall of furnace wall cooling, and the anise that is anistree tangential firing is arranged, descends three groups during burner branch in every angle is last; Amount to 40 burners, coal burner is SOFA burner, the sandwich wind formula of wide regulating ratio low-NOx combustor.
Embodiment 6:
The overcritical tower boiler using brown coal of 670MW that
are above-mentioned, the body of heater pressure-containing parts of described tower layout all is suspended on the big plate-girder, and these big plate-girders are to be supported by the main frame that four profiles are 2500 X2500mm; Rotary regenerative air preheater is installed on the steel construction of main boiler organ timbering of back; 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, fixes through vertical rigidity beam simultaneously.
Embodiment 7:
The overcritical tower boiler using brown coal of 670MW that
are above-mentioned, a boiler will be confirmed its relevant design parameter, what carry out at first is according to boundary condition (ature of coal data, designing requirement, environmental condition), calculates through the heat transfer of boiler.Heavy duty boiler all adopts computer program to carry out now, just so-called boiler heating power calculation procedure.For tower boiler; Breathe out pot for contacting first, experience is fewer aspect heating power calculating, therefore; Breathe out subcritical, supercritical unit that pot absorbs and use for reference successful operation; On original heating power calculation procedure basis, develop and perfect, simultaneously the coefficient correlation in the program is revised, develop the overcritical heating power calculation procedure that a cover is fit to tower boiler.
One of them index of the safe operation of
unit is exactly whether heating surface moves the overcritical tower boiler of safety, particularly direct current, 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.For this reason, my company carries out the secondary redevelopment to existing calculation of Wall Temperature program, increases relevant resistant to elevated temperatures material category, selects material more greatly according to deviation factor simultaneously, makes the selection of boiler heating surface more safe and reliable.
According to the characteristics that the tower boiler water-cooling wall is arranged, water-cooling wall is carried out Calculation and Study 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.
burner adopts big bellows structure, 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 anise and cuts layout on the four sides wall of Spiral Coil Waterwall, descends three groups during burner branch in every angle is last, amounts to 40 burners.Coal burner is the sandwich wind formula of a wide regulating ratio low-NOx combustor.
The body of heater pressure-containing parts of
tower layout all is suspended on the big plate-girder, and these big plate-girders are to be supported by the main frame that four profiles are 2500X2500mm.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, fixes through vertical rigidity beam simultaneously.
Claims (1)
1. the overcritical tower boiler using brown coal of
a kind of 670MW, its composition comprises: the body of heater of tower layout is characterized in that: described body of heater outer ring tool water-cooling wall; Described water-cooling wall connects air preheater through flue; Described water-cooling wall connects storage tank through steam-water separator, and burner is installed on the inboard four sides wall of described water-cooling wall, and described water-cooling wall inside 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
670MW 2. 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; Described preheater gas approach is equipped with air preheater in connecting, and described primary superheater, two-stage superheater and finishing superheater and low-temperature reheater, high temperature reheater all adopt horizontal arrangement.
The overcritical tower boiler using brown coal of
670MW 3. according to claim 1, it is characterized in that: described burner comprises SOFA burner and main burner, described water-cooling wall comprises vertical tube coil water-cooling wall and Spiral Coil Waterwall.
The overcritical tower boiler using brown coal of
670MW 4. according to claim 3; It is characterized in that: described main burner adopts big bellows structure; By dividing plate big bellows are separated into each air compartment, arrange burner nozzle in the exit of each bellows, burner arrangement is on the four sides wall of furnace wall cooling; The anise that is anistree tangential firing is arranged; Descend three groups during every angle burner branch is last, amount to 40 burners, coal burner is SOFA burner, the sandwich wind formula of wide regulating ratio low-NOx combustor.
The overcritical tower boiler using brown coal of
670MW 5. according to claim 1; It is characterized in that: the body of heater pressure-containing parts of described tower layout all is suspended on the big plate-girder, and these big plate-girders are to be supported by the main frame that four profiles are 2500X2500mm; Rotary regenerative air preheater is installed on the steel construction of main boiler organ timbering of back; 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, fixes through vertical rigidity beam simultaneously.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200331316U CN202452468U (en) | 2012-02-02 | 2012-02-02 | 670MW supercritical tower type lignite boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200331316U CN202452468U (en) | 2012-02-02 | 2012-02-02 | 670MW supercritical tower type lignite boiler |
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| Publication Number | Publication Date |
|---|---|
| CN202452468U true CN202452468U (en) | 2012-09-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200331316U Expired - Lifetime CN202452468U (en) | 2012-02-02 | 2012-02-02 | 670MW supercritical tower type lignite boiler |
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| CN (1) | CN202452468U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102537924A (en) * | 2012-02-02 | 2012-07-04 | 哈尔滨锅炉厂有限责任公司 | 670MW supercritical tower type brown coal boiler |
-
2012
- 2012-02-02 CN CN2012200331316U patent/CN202452468U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102537924A (en) * | 2012-02-02 | 2012-07-04 | 哈尔滨锅炉厂有限责任公司 | 670MW supercritical tower type brown coal boiler |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120926 |
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| CX01 | Expiry of patent term |