CN202032544U - Invert pulverized-coal fired boiler arrangement structure for ultrahigh steam temperature steam parameter - Google Patents

Invert pulverized-coal fired boiler arrangement structure for ultrahigh steam temperature steam parameter Download PDF

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Publication number
CN202032544U
CN202032544U CN2011201048067U CN201120104806U CN202032544U CN 202032544 U CN202032544 U CN 202032544U CN 2011201048067 U CN2011201048067 U CN 2011201048067U CN 201120104806 U CN201120104806 U CN 201120104806U CN 202032544 U CN202032544 U CN 202032544U
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steam
flue
burner hearth
heating
pulverized
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CN2011201048067U
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蒋敏华
肖平
江建忠
钟犁
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Huaneng Clean Energy Research Institute
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Huaneng Clean Energy Research Institute
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Abstract

The utility model discloses an invert pulverized-coal fired boiler arrangement structure for ultrahigh steam temperature steam parameter, which comprises a furnace cavity; the upper part or/and the top part of the furnace cavity is provided with a burner and the bottom outlet is provided with a slag discharge port, the furnace cavity is communicated with a middle upstream flue, the top part of the middle upstream flue is horizontally communicated with the top part of a tail downstream flue, a screen heating surface is arranged at the lower part inside the furnace cavity, a convection heating surface formed by an economizer, superheater tubes and reaheater tubes is arranged inside the middle upstream flue, and a denitration system and an air preheater are arranged inside the tail downstream flue from top to bottom; a furnace cavity outlet and a level flue of the furnace cavity outlet are arranged at the lower part of the boiler, so that the high temperature flue gas at the furnace cavity outlet is at lower elevation and the high-temperature superheater and the high-temperature reheater are arranged at lower elevation, thereby reducing tube frictional drag and radiation loss and increasing the efficiency of a power unit, and therefore, the power unit adopts ultrahigh steam temperature steam parameter and/or adopts a secondary reheating system.

Description

Be applicable to the inversion pulverized-coal fired boiler arrangement of superelevation steam temperature steam parameter
Technical field
The utility model relates to the boiler plant field, is specifically related to a kind of inversion pulverized-coal fired boiler arrangement that is applicable to superelevation steam temperature steam parameter.
Background technology
The pulverized-coal fired boiler generating set as the core technology of thermal power generation, has experienced 100 years of development courses.From subcritical to overcritical, arrive ultra supercritical again, the coal-fired thermoelectricity technology of China has obtained fast development especially in recent years.Greatly developing the coal-fired thermoelectricity technology of ultra supercritical, improve unit efficiency, is current realization energy-saving and emission-reduction, the most economical valid approach that reduces CO2 emission.
At present, subcritical single reheat fired power generating unit generating efficiency is about 37%, overcritical single reheat fired power generating unit generating efficiency is about 41%, can reach about 44% and main steam and reheat steam temperature are 600 ℃ ultra supercritical single reheat fired power generating unit generating efficiency.If further improve steam parameter, unit generation efficient is expected to realize further raising, when main steam and reheat steam temperature reach 700 ℃ and superelevation steam temperature steam parameter when above, single reheat fired power generating unit generating efficiency is expected to reach more than 48.5%, and double reheat fired power generating unit generating efficiency is expected to reach more than 51% especially.Therefore, all actively developing the advanced ultra supercritical thermal power generation unit technology that vapor (steam) temperature meets or exceeds 700 ℃ superelevation steam temperature steam parameter both at home and abroad.
The thermal power generation unit of exploitation superelevation steam temperature steam parameter, promptly main steam and reheat steam temperature reach 700 ℃ and above thermal power generation unit, face many key technical problems.Wherein, the major technology difficult point has two, and the one, exploitation can be satisfied the high-temperature alloy material of ultra supercritical thermal power generation unit application requirements of superelevation steam temperature steam parameter, and the 2nd, realizes the design optimization of such machine set system, reduction cost.
Studies show that both at home and abroad the high-temperature alloy material that most possibly is used for superelevation steam temperature ultra supercritical thermal power generation unit high-temperature component is mainly nickel-base alloy.But the price of these nickel-bass alloy materials is very high, is more than 10 times of refractory Fe-base alloy steel of at present conventional 600 ℃ of grades.System layout mode according to present conventional fired power generating unit, if adopt nickel-bass alloy material, with 2 * 1000MW ultra supercritical unit is example, singly be the high temperature " four large pipelines " that connects between main steam and reheated steam and the steam turbine, its price just will increase to about 2,500,000,000 yuan by present about 300,000,000 yuans.Boiler and steam turbine high-temperature parts adopt heat-resisting alloy to cause the raising of its cost in addition, finally make the ultra supercritical unit overall cost of 700 ℃ of grades be much higher than conventional 600 ℃ of grade fired power generating unit, limited the application and the popularization of superelevation steam parameter fired power generating unit.
In addition, conventional main vapour and 600 ℃ of reheat steam temperatures and following fired power generating unit, though both can adopt steam single reheat, also can adopt secondary steam heat again, and adopt double reheat can improve unit efficiency by a relatively large margin, but the Chinese large-sized fired power generating unit all adopts the single reheat system at present, also only has a small amount of large electric power plant unit to adopt the double reheat system abroad.This is that the machine set system complexity increases than the single reheat system because after adopting double reheat, and investment also increases by a fairly big margin, thereby has limited the application of double reheat system.If can reduce the complexity and the cost that adopt the double reheat system by optimizing the machine set system design, will improve the real feasibility that the large electric power plant unit adopts the double reheat system greatly.
Therefore, how to optimize the design of machine set system, reduce the high-temperature material consumption, for the application and the popularization that realize superelevation steam temperature ultra supercritical unit, promote of the application of secondary steam reheat system, improve the generating efficiency of unit, play crucial effects at the large electric power plant unit.
The patent No. is that 200720069418.3 " a kind of novel steam generating set " announced a kind of by being layout straggly with the high and low axle of Turbo-generator Set, thereby reducing the length of double reheat unit high temperature and high pressure steam pipeline and the method for cost, is the another kind of thinking that addresses this problem.But because the height of high pressure cylinder and generator composition is put axle is the height that need be arranged in about 80 meters, can cause more serious problems such as vibrations, needs to solve great technical barriers such as support and basis, and this arrangement still can't be applied.
At present, the arrangement form that domestic and international pulverized-coal fired boiler generally adopts adopts "T"-shaped stove on a small quantity based on " π " shape stove, tower-type furnace.Wherein, " π " shape stove is the present domestic big-and-middle-sized fired power generating unit boiler arrangement form of normal employing, is characterized in that boiler is made of burner hearth and a back-end ductwork, and a part of heating surface is arranged in the middle of horizontal flue and the back-end ductwork vertical shaft.Adopt " π " shape to arrange boiler, the relative tower-type furnace of its furnace height is short, and favourable to violent earthquake area and strong wind area, cost is also low.But because flue gas eddy current and disturbance are more violent, the uniformity of flow of flue gas is relatively poor, causes the heating surface inequality of being heated easily, thereby causes bigger temperature deviation; And when using inferior fuel, boiler abrasion is comparatively serious.
The turriform stove then is arranged in all heating surfaces the burner hearth top, and the afterbody vertical gas pass is not arranged heating surface, and " π " shape stove floor space is little relatively, is fit to the engineering of plant area's land used anxiety.Tower boiler is because flue gas upwards flows, and dust in flue gas flow velocity under the gravity effect slows down or sedimentation downwards, and therefore the wearing and tearing to heating surface reduce greatly.And the uniformity of flow of flue gas is better, and the temperature deviation of heating surface and working medium is less.Turriform boiler framework is simple in addition, and expansion center of boiler and Seal Design are handled easily, arranges compact.Therefore, for the ultra supercritical unit, tower-type furnace has certain advantage.
"T"-shaped stove then is that back-end ductwork is divided into duplicate two the convection current vertical well gas flue of size, be arranged in the burner hearth both sides symmetrically, to solve " π " shape stove back-end surfaces difficult arrangement problem, furnace outlet smokestack height is reduced, reduce the thermal deviation of flue gas along height, and the flue gas flow rate in the vertical shaft can reduce, and reduces wear.But it is bigger that floor space is arranged than " π " type, steam-water pipe connected system complexity, and metal wastage is big, the cost height, domestic application is less.
No matter boiler adopts the sort of arrangement form, flue gas all flows in burner hearth from bottom to top, and because of the needs that conduct heat, high-temperature surface need be arranged in the higher zone of flue-gas temperature, and the high-temperature flue gas zone is according to the difference of the type of furnace, and the absolute altitude of position is more than 50~80 meters, thereby causes by the high-temperature surface outlet header very long to the high-temperature steam connecting pipe between the steam turbine, cost is bigger, has limited the employing of technology such as double reheat.Bring up in vapor (steam) temperature under the superelevation steam temperature steam parameter situation of 700 ℃ of grades, because the basis weight materials price of high-temperature steam connecting pipe significantly raises, therefore, how to reduce high-temperature steam connecting pipe length and cost and become the key technical problem that needs solve.
Summary of the invention
In order to overcome the deficiency that above-mentioned prior art exists, the purpose of this utility model is to provide a kind of inversion pulverized-coal fired boiler arrangement that is applicable to superelevation steam temperature steam parameter, make high temperature superheater and high temperature reheater be arranged in low absolute altitude place, thereby reduced pipeline on-way resistance and radiation loss, improved generating set efficient, make generating set adopt superelevation steam temperature steam parameter, and/or adopt the double reheat system to become possibility.
In order to achieve the above object, the technical scheme that the utility model adopted is:
A kind of inversion pulverized-coal fired boiler arrangement that is applicable to superelevation steam temperature steam parameter, comprise that outlet at bottom is provided with the burner hearth 4 of slag-drip opening 1, the lower sidewall of described burner hearth 4 has burner hearth exhanst gas outlet 201, burner hearth exhanst gas outlet 201 is conducted with an end of furnace outlet horizontal flue 12, the other end of furnace outlet horizontal flue 12 is conducted with middle part updraught flue 14, the top, horizontal conducting of the top of this middle part updraught flue 14 and afterbody down pass 22; Described burner hearth 4 inner belows are provided with curtain wall 2, be provided with the convection heating surface that economizer 13, superheater tube group 8 and reheater tube group 9 form in the described middle part updraught flue 14, wherein finishing superheater and final reheater are conducted by high pressure cylinder 103 and intermediate pressure cylinder group 107 corresponding in high temperature steam pipeline 20 and the steam turbine 25 respectively, be provided with denitrating system 21 and air preheater 23 in the described afterbody down pass 22 from top to bottom, the sidewall below of described in addition afterbody down pass 22 is provided with tail flue gas outlet 24.
Burner hearth exhanst gas outlet 201 tops of described burner hearth 4 sidewalls are furnace arch, furnace nose 202.
The sidewall top of described burner hearth 4 is provided with wall fired burners 5.
The top of described burner hearth 4 is provided with top formula burner 6.
The described convection heating surface that is arranged in middle part updraught flue 14, adopt series connection or arrangement form in parallel, when employing is arranged in parallel, economizer 13, superheater tube group 8 and the reheater tube group 9 of convection heating surface are divided into plural convection heating surface grouping, be provided with dividing wall 18 between convection heating surface and the convection heating surface, be provided with gas baffle 15 after the dividing wall 18.
Form by water-cooling wall 3 coatings around the described burner hearth 4, described water-cooling wall 3 is Spiral Coil Waterwall, internal thread vertical tube water-cooling wall, common vertical tube water-cooling wall or is Spiral Coil Waterwall, internal thread vertical tube water-cooling wall and common vertical tube water-cooling wall three's combination in twos, and the overall flow direction of water-cooled working medium in water-cooling wall is for flowing from top to bottom or flowing from top to bottom.
Described curtain wall 2 is the superheated steam heating surface, be reheated steam heating surface, evaporating heating surface or be superheated steam heating surface, reheated steam heating surface and evaporating heating surface three's combination.
Described middle part updraught flue 14 is coated by bag wall heating surface 7 and forms.
The below of described slag-drip opening 1 is provided with slag extractor 19.
The bottom of described middle part updraught flue 14 is provided with first ash discharging hole 101, and the bottom of described afterbody down pass 22 is provided with second ash discharging hole 102.
The utlity model has following beneficial effect:
1, because burner places the sidewall top of burner hearth 4 or the top of burner hearth 4, curtain wall 2 is arranged in the bottom of burner hearth 4, simultaneously have burner hearth exhanst gas outlet 201 in the bottom of burner hearth 4, thereby realized the inversion of burner hearth 4, make the high-temperature flue gas of furnace outlet be in low absolute altitude place, make high temperature superheater and high temperature reheater be arranged in low absolute altitude place and become possibility, thereby reduced the length that connects high temperature steam pipeline 20 expensive between boiler and the steam turbine 25 in the steam pipe system, reduced the manufacturing cost of the pulverized-coal fired boiler of superelevation steam temperature steam parameter, pipeline on-way resistance and radiation loss have been reduced simultaneously, improved generating set efficient, made generating set adopt superelevation steam temperature steam parameter to become possibility.
2, owing to reduced the length that connects high temperature steam pipeline 20 expensive between boiler and the steam turbine 25 in the high temperature steam pipeline system, simplify the layout of high temperature steam pipeline 20, therefore be convenient to adopt the unit of superelevation steam temperature steam parameter and higher steam temperature to adopt the secondary steam reheat system.
3, superheater tube group 8 and reheater tube group 9 mainly are arranged in the updraught flue, and dust in flue gas flow velocity under the gravity effect slows down or sedimentation downwards, and therefore the wearing and tearing to convection heating surface reduce.
4, denitrating system 21 and air preheater 23 are arranged in the afterbody down pass 22, thereby efficiently solve denitrating system 21 in " π " shape stove, the problem that is difficult to arrange because of spatial constraints.
Description of drawings
Fig. 1 represents the flow of flue gas direction for the schematic diagram of the inversion pulverized-coal fired boiler arrangement that is applicable to superelevation steam temperature steam parameter among the embodiment 1 of the present utility model, inner arrow.
Fig. 2 represents the flow of flue gas direction for the schematic diagram of the inversion pulverized-coal fired boiler arrangement that is applicable to superelevation steam temperature steam parameter among the embodiment 2 of the present utility model, inner arrow.
Fig. 3 represents the flow of flue gas direction for the schematic diagram of the inversion pulverized-coal fired boiler arrangement that is applicable to superelevation steam temperature steam parameter among the embodiment 3 of the present utility model, inner arrow.
Fig. 4 represents the flow of flue gas direction for the schematic diagram of the inversion pulverized-coal fired boiler arrangement that is applicable to superelevation steam temperature steam parameter among the embodiment 4 of the present utility model, inner arrow.
The specific embodiment
Below in conjunction with drawings and Examples the utility model is described in more detail.
Embodiment 1:
As shown in Figure 1, be applicable to the inversion pulverized-coal fired boiler arrangement of superelevation steam temperature steam parameter, comprise that outlet at bottom is provided with the burner hearth 4 of slag-drip opening 1, the lower sidewall of described burner hearth 4 has burner hearth exhanst gas outlet 201, burner hearth exhanst gas outlet 201 is conducted with an end of furnace outlet horizontal flue 12, the other end of furnace outlet horizontal flue 12 is conducted with middle part updraught flue 14, the top, horizontal conducting of the top of this middle part updraught flue 14 and afterbody down pass 22; Described burner hearth 4 inner belows are provided with curtain wall 2, be provided with the convection heating surface that economizer 13, superheater tube group 8 and reheater tube group 9 form in the described middle part updraught flue 14, finishing superheater in superheater and the reheater and final reheater are conducted by high pressure cylinder 103 and intermediate pressure cylinder group 107 corresponding in high temperature steam pipeline 20 and the steam turbine 25 respectively, be provided with denitrating system 21 and air preheater 23 in the described afterbody down pass 22 from top to bottom, the sidewall below of described in addition afterbody down pass 22 is provided with tail flue gas outlet 24.Burner hearth exhanst gas outlet 201 tops of described burner hearth 4 sidewalls are furnace arch, furnace nose 202.The sidewall top of described burner hearth 4 is provided with wall fired burners 5.The top of described burner hearth 4 is provided with top formula burner 6.The described convection heating surface that is arranged in middle part updraught flue 14 adopts and is arranged in parallel, economizer 13, superheater tube group 8 and the reheater tube group 9 of convection heating surface are divided into three convection heating surface groupings, be provided with dividing wall 18 between convection heating surface and the convection heating surface, be provided with gas baffle 15 after the dividing wall 18.Form by water-cooling wall 3 coatings around the described burner hearth 4, described water-cooling wall 3 is Spiral Coil Waterwall, internal thread vertical tube water-cooling wall, common vertical tube water-cooling wall or is Spiral Coil Waterwall, internal thread vertical tube water-cooling wall and common vertical tube water-cooling wall three's combination in twos, and the overall flow direction of water-cooled working medium in water-cooling wall is for flowing from top to bottom or flowing from top to bottom.Described curtain wall 2 is the superheated steam heating surface, be reheated steam heating surface, evaporating heating surface or be superheated steam heating surface, reheated steam heating surface and evaporating heating surface three's combination.Described middle part updraught flue 14 is coated by bag wall heating surface 7 and forms.The below of described slag-drip opening 1 is provided with slag extractor 19.The bottom of described middle part updraught flue 14 is provided with first ash discharging hole 101, and the bottom of described afterbody down pass 22 is provided with second ash discharging hole 102.
Embodiment 2:
As shown in Figure 2, be applicable to the inversion pulverized-coal fired boiler arrangement of superelevation steam temperature steam parameter, comprise that outlet at bottom is provided with the burner hearth 4 of slag-drip opening 1, the lower sidewall of described burner hearth 4 has burner hearth exhanst gas outlet 201, burner hearth exhanst gas outlet 201 is conducted with an end of furnace outlet horizontal flue 12, the other end of furnace outlet horizontal flue 12 is conducted with middle part updraught flue 14, the top, horizontal conducting of the top of this middle part updraught flue 14 and afterbody down pass 22; Described burner hearth 4 inner belows are provided with curtain wall 2, be provided with the convection heating surface that economizer 13, superheater tube group 8 and reheater tube group 9 form in the described middle part updraught flue 14, wherein finishing superheater and final reheater are conducted by high pressure cylinder 103 and intermediate pressure cylinder group 107 corresponding in high temperature steam pipeline 20 and the steam turbine 25 respectively, be provided with denitrating system 21 and air preheater 23 in the described afterbody down pass 22 from top to bottom, the sidewall below of described in addition afterbody down pass 22 is provided with tail flue gas outlet 24.Burner hearth exhanst gas outlet 201 tops of described burner hearth 4 sidewalls are furnace arch, furnace nose 202.The sidewall top of described burner hearth 4 is provided with wall fired burners 5.The described convection heating surface that is arranged in middle part updraught flue 14 adopts the arrangement form of connecting.Form by water-cooling wall 3 coatings around the described burner hearth 4, described water-cooling wall 3 is Spiral Coil Waterwall, internal thread vertical tube water-cooling wall, common vertical tube water-cooling wall or is Spiral Coil Waterwall, internal thread vertical tube water-cooling wall and common vertical tube water-cooling wall three's combination in twos, and the overall flow direction of water-cooled working medium in water-cooling wall is for flowing from top to bottom or flowing from top to bottom.Described curtain wall 2 is the superheated steam heating surface, be reheated steam heating surface, evaporating heating surface or be superheated steam heating surface, reheated steam heating surface and evaporating heating surface three's combination.Described middle part updraught flue 14 is coated by bag wall heating surface 7 and forms.The below of described slag-drip opening 1 is provided with slag extractor 19.The bottom of described middle part updraught flue 14 is provided with first ash discharging hole 101, and the bottom of described afterbody down pass 22 is provided with second ash discharging hole 102.
Embodiment 3:
As shown in Figure 3, be applicable to the inversion pulverized-coal fired boiler arrangement of superelevation steam temperature steam parameter, comprise that outlet at bottom is provided with the burner hearth 4 of slag-drip opening 1, the lower sidewall of described burner hearth 4 has burner hearth exhanst gas outlet 201, burner hearth exhanst gas outlet 201 is conducted with an end of furnace outlet horizontal flue 12, the other end of furnace outlet horizontal flue 12 is conducted with middle part updraught flue 14, the top, horizontal conducting of the top of this middle part updraught flue 14 and afterbody down pass 22; Described burner hearth 4 inner belows are provided with curtain wall 2, be provided with the convection heating surface that economizer 13, superheater tube group 8 and reheater tube group 9 form in the described middle part updraught flue 14, wherein finishing superheater and final reheater are conducted by high pressure cylinder 103 and intermediate pressure cylinder group 107 corresponding in high temperature steam pipeline 20 and the steam turbine 25 respectively, be provided with denitrating system 21 and air preheater 23 in the described afterbody down pass 22 from top to bottom, the sidewall below of described in addition afterbody down pass 22 is provided with tail flue gas outlet 24.Burner hearth exhanst gas outlet 201 tops of described burner hearth 4 sidewalls are furnace arch, furnace nose 202.The sidewall top of described burner hearth 4 is provided with wall fired burners 5.The described convection heating surface that is arranged in middle part updraught flue 14, adopt arrangement form in parallel, economizer 13, superheater tube group 8 and the reheater tube group 9 of convection heating surface are divided into two convection heating surface groupings, be provided with dividing wall 18 between convection heating surface and the convection heating surface, be provided with gas baffle 15 after the dividing wall 18.Form by water-cooling wall 3 coatings around the described burner hearth 4, described water-cooling wall 3 is Spiral Coil Waterwall, internal thread vertical tube water-cooling wall, common vertical tube water-cooling wall or is Spiral Coil Waterwall, internal thread vertical tube water-cooling wall and common vertical tube water-cooling wall three's combination in twos, and the overall flow direction of water-cooled working medium in water-cooling wall is for flowing from top to bottom or flowing from top to bottom.Described curtain wall 2 is the superheated steam heating surface, be reheated steam heating surface, evaporating heating surface or be superheated steam heating surface, reheated steam heating surface and evaporating heating surface three's combination.Described middle part updraught flue 14 is coated by bag wall heating surface 7 and forms.The below of described slag-drip opening 1 is provided with slag extractor 19.The bottom of described middle part updraught flue 14 is provided with first ash discharging hole 101, and the bottom of described afterbody down pass 22 is provided with second ash discharging hole 102.
Embodiment 4:
As shown in Figure 4, be applicable to the inversion pulverized-coal fired boiler arrangement of superelevation steam temperature steam parameter, comprise that outlet at bottom is provided with the burner hearth 4 of slag-drip opening 1, the lower sidewall of described burner hearth 4 has burner hearth exhanst gas outlet 201, burner hearth exhanst gas outlet 201 is conducted with an end of furnace outlet horizontal flue 12, the other end of furnace outlet horizontal flue 12 is conducted with middle part updraught flue 14, the top, horizontal conducting of the top of this middle part updraught flue 14 and afterbody down pass 22; Described burner hearth 4 inner belows are provided with curtain wall 2, be provided with the convection heating surface that economizer 13, superheater tube group 8 and reheater tube group 9 form in the described middle part updraught flue 14, wherein finishing superheater and final reheater are conducted by high pressure cylinder 103 and intermediate pressure cylinder group 107 corresponding in high temperature steam pipeline 20 and the steam turbine 25 respectively, be provided with denitrating system 21 and air preheater 23 in the described afterbody down pass 22 from top to bottom, the sidewall below of described in addition afterbody down pass 22 is provided with tail flue gas outlet 24.The sidewall top of described burner hearth 4 is provided with wall fired burners 5.The top of described burner hearth 4 is provided with top formula burner 6.The described convection heating surface that is arranged in middle part updraught flue 14 adopts the arrangement form of connecting.Form by water-cooling wall 3 coatings around the described burner hearth 4, described water-cooling wall 3 is Spiral Coil Waterwall, internal thread vertical tube water-cooling wall, common vertical tube water-cooling wall or is Spiral Coil Waterwall, internal thread vertical tube water-cooling wall and common vertical tube water-cooling wall three's combination in twos, and the overall flow direction of water-cooled working medium in water-cooling wall is for flowing from top to bottom or flowing from top to bottom.Described curtain wall 2 is the superheated steam heating surface, be reheated steam heating surface, evaporating heating surface or be superheated steam heating surface, reheated steam heating surface and evaporating heating surface three's combination.Described middle part updraught flue 14 is coated by bag wall heating surface 7 and forms.The below of described slag-drip opening 1 is provided with slag extractor 19.The bottom of described middle part updraught flue 14 is provided with first ash discharging hole 101, and the bottom of described afterbody down pass 22 is provided with second ash discharging hole 102.
Operation principle of the present utility model is: flue gas flows from the top down in burner hearth 4 inside, enter middle part updraught flue 14 via furnace outlet horizontal flue 12 then, flue gas is again via the convection heating surface in the middle part updraught flue 14, enter afterbody down pass 22 from the top of middle part updraught flue 14, last flue gas flows out from tail flue gas outlet 24 successively by behind denitrating system 21 and the air preheater 23.

Claims (10)

1. inversion pulverized-coal fired boiler arrangement that is applicable to superelevation steam temperature steam parameter, comprise that outlet at bottom is provided with the burner hearth of slag-drip opening (1) (4), it is characterized in that: the lower sidewall of described burner hearth (4) has burner hearth exhanst gas outlet (201), burner hearth exhanst gas outlet (201) is conducted with an end of furnace outlet horizontal flue (12), the other end of furnace outlet horizontal flue (12) is conducted with middle part updraught flue (14), the top, horizontal conducting of the top of this middle part updraught flue (14) and afterbody down pass (22); The inner below of described burner hearth (4) is provided with curtain wall (2), be provided with economizer (13) in the described middle part updraught flue (14), the convection heating surface that superheater tube group (8) and reheater tube group (9) form, wherein finishing superheater and final reheater are conducted by high temperature steam pipeline (20) and steam turbine (25) middle corresponding high pressure cylinder (103) and intermediate pressure cylinder group (107) respectively, be provided with denitrating system (21) and air preheater (23) in the described afterbody down pass (22) from top to bottom, the sidewall below of described in addition afterbody down pass (22) is provided with tail flue gas outlet (24).
2. the inversion pulverized-coal fired boiler arrangement that is applicable to superelevation steam temperature steam parameter according to claim 1 is characterized in that: burner hearth exhanst gas outlet (201) top of described burner hearth 4 sidewalls is furnace arch, furnace nose (202).
3. according to claim 1 or the described inversion pulverized-coal fired boiler arrangement that is applicable to superelevation steam temperature steam parameter of claim 2, it is characterized in that: the sidewall top of described burner hearth (4) is provided with wall fired burners (5).
4. according to claim 1 or the described inversion pulverized-coal fired boiler arrangement that is applicable to superelevation steam temperature steam parameter of claim 2, it is characterized in that: the top of described burner hearth (4) is provided with top formula burner (6).
5. according to claim 1 or the described inversion pulverized-coal fired boiler arrangement that is applicable to superelevation steam temperature steam parameter of claim 2, it is characterized in that: the described convection heating surface that is arranged in middle part updraught flue (14), adopt series connection or arrangement form in parallel, when employing is arranged in parallel, economizer (13), superheater tube group (8) and the reheater tube group (9) of convection heating surface are divided into plural convection heating surface grouping, be provided with dividing wall (18) between convection heating surface and the convection heating surface, dividing wall (18) is provided with gas baffle (15) afterwards.
6. according to claim 1 or the described inversion pulverized-coal fired boiler arrangement that is applicable to superelevation steam temperature steam parameter of claim 2, it is characterized in that: form by water-cooling wall (3) coating around the described burner hearth (4), described water-cooling wall (3) is Spiral Coil Waterwall, internal thread vertical tube water-cooling wall, common vertical tube water-cooling wall or is Spiral Coil Waterwall, internal thread vertical tube water-cooling wall and common vertical tube water-cooling wall three's combination in twos, and the overall flow direction of water-cooled working medium in water-cooling wall is for flowing from top to bottom or flowing from top to bottom.
7. according to claim 1 or the described inversion pulverized-coal fired boiler arrangement that is applicable to superelevation steam temperature steam parameter of claim 2, it is characterized in that: described curtain wall (2) for the superheated steam heating surface, be reheated steam heating surface, evaporating heating surface or be superheated steam heating surface, reheated steam heating surface and evaporating heating surface three's combination.
8. according to claim 1 or the described inversion pulverized-coal fired boiler arrangement that is applicable to superelevation steam temperature steam parameter of claim 2, it is characterized in that: described middle part updraught flue (14) is coated by bag wall heating surface (7) and forms.
9. according to claim 1 or the described inversion pulverized-coal fired boiler arrangement that is applicable to superelevation steam temperature steam parameter of claim 2, it is characterized in that: the below of described slag-drip opening (1) is provided with slag extractor (19).
10. according to claim 1 or the described inversion pulverized-coal fired boiler arrangement that is applicable to superelevation steam temperature steam parameter of claim 2, it is characterized in that: the bottom of described middle part updraught flue (14) is provided with first ash discharging hole (101), and the bottom of described afterbody down pass (22) is provided with second ash discharging hole (102).
CN2011201048067U 2011-04-11 2011-04-11 Invert pulverized-coal fired boiler arrangement structure for ultrahigh steam temperature steam parameter Expired - Lifetime CN202032544U (en)

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Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102147105A (en) * 2011-04-11 2011-08-10 中国华能集团清洁能源技术研究院有限公司 Arrangement structure of inverted pulverized-coal fired boiler suitable for ultra-high steam temperature steam parameters
CN102537937A (en) * 2012-02-26 2012-07-04 哈尔滨锅炉厂有限责任公司 Device for adjusting temperature of reheated steam of boiler by aid of three tail-flues
CN102889570A (en) * 2012-09-11 2013-01-23 上海锅炉厂有限公司 Tower-type boiler with primary reheater and secondary reheater
CN103017137A (en) * 2012-12-27 2013-04-03 青岛胜利锅炉有限公司 Low-temperature corrosion resisting structure of boiler
CN103062747A (en) * 2012-12-24 2013-04-24 杭州燃油锅炉有限公司 Vertical type coal dust corner tube boiler
CN103062748A (en) * 2012-12-24 2013-04-24 杭州燃油锅炉有限公司 Vertical type coal dust corner tube boiler
CN103185343A (en) * 2013-03-23 2013-07-03 安徽金鼎锅炉股份有限公司 Hearth structure of incineration boiler
CN103776020A (en) * 2014-02-26 2014-05-07 章礼道 Double reheat power station boiler with three rear flues and double rear baffles and capable of recycling jet flow flue gas
CN103807863A (en) * 2014-01-24 2014-05-21 上海发电设备成套设计研究院 Improved smoke temperature adjusting system for selective catalytic reduction
CN103851603A (en) * 2014-03-17 2014-06-11 山西新唐工程设计有限公司 Compact distributed coal powder boiler with SCR (selective catalytic reduction device)
CN104728823A (en) * 2015-03-17 2015-06-24 西安热工研究院有限公司 Novel supercritical carbon dioxide coal-fired boiler
CN107676769A (en) * 2017-09-28 2018-02-09 哈尔滨锅炉厂有限责任公司 A kind of arrangement of U-shaped boiler and its unit suitable for ultra supercritical Large Copacity coal unit
WO2021110020A1 (en) * 2019-12-06 2021-06-10 江苏太湖锅炉股份有限公司 Flue gas waste heat utilization system

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9488370B2 (en) 2011-04-11 2016-11-08 Huaneng Clean Energy Research Institute Arrangement structure suitable for inverted pulverized coal boiler with ultra-high steam temperature steam parameters
WO2012139383A1 (en) * 2011-04-11 2012-10-18 中国华能集团清洁能源技术研究院有限公司 Inverted layout structure for pulverized coal boiler adapted to ultra-high temperature steam parameters
CN102147105A (en) * 2011-04-11 2011-08-10 中国华能集团清洁能源技术研究院有限公司 Arrangement structure of inverted pulverized-coal fired boiler suitable for ultra-high steam temperature steam parameters
CN102537937A (en) * 2012-02-26 2012-07-04 哈尔滨锅炉厂有限责任公司 Device for adjusting temperature of reheated steam of boiler by aid of three tail-flues
CN102889570A (en) * 2012-09-11 2013-01-23 上海锅炉厂有限公司 Tower-type boiler with primary reheater and secondary reheater
WO2014040491A1 (en) * 2012-09-11 2014-03-20 上海锅炉厂有限公司 Tower-type boiler with primary reheater and secondary reheater
CN102889570B (en) * 2012-09-11 2014-11-12 上海锅炉厂有限公司 Tower-type boiler with primary reheater and secondary reheater
CN103062747A (en) * 2012-12-24 2013-04-24 杭州燃油锅炉有限公司 Vertical type coal dust corner tube boiler
CN103062748A (en) * 2012-12-24 2013-04-24 杭州燃油锅炉有限公司 Vertical type coal dust corner tube boiler
CN103017137A (en) * 2012-12-27 2013-04-03 青岛胜利锅炉有限公司 Low-temperature corrosion resisting structure of boiler
CN103185343A (en) * 2013-03-23 2013-07-03 安徽金鼎锅炉股份有限公司 Hearth structure of incineration boiler
CN103807863A (en) * 2014-01-24 2014-05-21 上海发电设备成套设计研究院 Improved smoke temperature adjusting system for selective catalytic reduction
CN103807863B (en) * 2014-01-24 2018-02-13 上海发电设备成套设计研究院 A kind of cigarette temperature controlling system for SCR transformation
CN103776020A (en) * 2014-02-26 2014-05-07 章礼道 Double reheat power station boiler with three rear flues and double rear baffles and capable of recycling jet flow flue gas
CN103776020B (en) * 2014-02-26 2015-06-17 章礼道 Double reheat power station boiler with three rear flues and double rear baffles and capable of recycling jet flow flue gas
CN103851603A (en) * 2014-03-17 2014-06-11 山西新唐工程设计有限公司 Compact distributed coal powder boiler with SCR (selective catalytic reduction device)
CN104728823A (en) * 2015-03-17 2015-06-24 西安热工研究院有限公司 Novel supercritical carbon dioxide coal-fired boiler
CN107676769A (en) * 2017-09-28 2018-02-09 哈尔滨锅炉厂有限责任公司 A kind of arrangement of U-shaped boiler and its unit suitable for ultra supercritical Large Copacity coal unit
WO2021110020A1 (en) * 2019-12-06 2021-06-10 江苏太湖锅炉股份有限公司 Flue gas waste heat utilization system

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