CN101749697A - Circulating fluidized bed boiler hearth with grand-cross penetrating middle wall structure - Google Patents
Circulating fluidized bed boiler hearth with grand-cross penetrating middle wall structure Download PDFInfo
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- CN101749697A CN101749697A CN200910157102A CN200910157102A CN101749697A CN 101749697 A CN101749697 A CN 101749697A CN 200910157102 A CN200910157102 A CN 200910157102A CN 200910157102 A CN200910157102 A CN 200910157102A CN 101749697 A CN101749697 A CN 101749697A
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Abstract
The invention discloses a circulating fluidized bed boiler hearth with a grand-cross penetrating middle wall structure, comprising an air distributing board, a water cooled wall, a ceiling and a circulating fluidized bed boiler hearth, wherein the water cooled wall is arranged around the circulating fluidized bed boiler hearth, the upper end of which is provided with the ceiling, the lower end of the circulating fluidized bed boiler hearth is provided with the air distributing board, and a grand-cross penetrating middle wall is arranged in the circulating fluidized bed boiler hearth and comprises a middle wall vertically arranged in the width direction and a middle wall vertically arranged in the depth direction. The grand-cross penetrating middle wall is arranged in the hearth and has the heated condition similar to that of the ambient water cooled wall so that large enough evaporating and heat-transferring area can be provided, and meanwhile, a membrane wall or a light tube is selected as required so that the concentration, the temperature and the heat-transferring uniformity of materials in the hearth are ensured.
Description
Technical field
The present invention relates to CFBB, relate in particular to a kind of boiler hearth of circulating fluidized bed that runs through the mid-board structure with grand cross.
Background technology
Maximization and high parameterization along with recirculating fluidized bed (CFB) boiler, furnace heating surface is long-pending constantly to be increased, furnace height constantly increases, and ever-increasing furnace height all brings problem for boiler foundation, structural configuration and manufacturing cost, and it is the problem that must solve that CFB boiler maximization back boiler hearth heating surface rationally is set.
There is the heating surface Layout Problem in the different technical scheme solution CFB boiler maximizations in CFB boiler technology field at present.Applicant Alstom proposes to be provided with in lower furnace portion the method (patent publication No. CN 1643302A) of separator, and bed surface is divided into two parts, and vertical burner hearth vertically is provided with the heat-exchange tube panel on the separator, as the extended surface of water-cooling wall.Applicant Xi'an Thermal Power Research Institute Co., Ltd. proposes the CFBB (patent publication No. CN 1621740A) of band curtain wall structure, can adopt a full partition wall heating surface that burner hearth is divided into two independent sectors, perhaps adopt a plurality of half partition wall heating surface mistakes mode of putting of arranging.Applicant Dongfang Boiler (Group) Co., Ltd. proposes with the boiler hearth of circulating fluidized bed of water-cooling wall mid-board (patent publication No. CN 200940824Y) back-to-back, adopt reverse V-shaped dividing wall and be located at dividing wall between pushing up with burner hearth with the fence type of upper and lower collection case back-to-back the water-cooling wall mid-board increase the burner hearth heat transfer area.Applicant Institute of Engineering Thernophysics, Academia Sinica proposes the boiler hearth of circulating fluidized bed (patent publication No. CN 101240893A) of band heating screen, and the membrane wall heating screen top of employing is vertical, and the bottom is by allowing pipe form bed material balance pipe.Applicant Foster Wheeler Energia Co., Ltd proposes a kind of CFB boiler furnace evaporator surface structure (patent publication No. CN 101558265A), this structure is made of the vertical evaporator surface unit of two rows, is connected on the furnace roof by a kind of structure that can vertically move between evaporator surface unit and furnace roof.Applicant Institute of Engineering Thernophysics, Academia Sinica proposes the boiler hearth of circulating fluidized bed (patent publication No. CN 101196297A) of band water-cooled column, the water-cooled column that a plurality of membrane walls surround is set in burner hearth, the space can be communicated with atmosphere up and down in the post, the air channel also can be set feed secondary wind.
Comprehensive existing various furnace heating surface arrangements generally all are that the method that the mid-board heating surface is set in burner hearth solves the Surface of Large-scale CFB Boiler Layout Problem.These methods in varying degrees for burner hearth provides extended surface, but for especially big extra-high-speed burner hearth, the expansion of heating surface still is limited in to a certain degree in the scope.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, a kind of boiler hearth of circulating fluidized bed that runs through the mid-board structure with grand cross is provided.
The boiler hearth of circulating fluidized bed that the band grand cross runs through the mid-board structure comprises air distribution plate, water-cooling wall, ceiling, boiler hearth of circulating fluidized bed, around the boiler hearth of circulating fluidized bed is water-cooling wall, the boiler hearth of circulating fluidized bed upper end is provided with ceiling, the boiler hearth of circulating fluidized bed lower end is provided with air distribution plate, in boiler hearth of circulating fluidized bed, be provided with the cross penetrating mid-board, the cross penetrating mid-board comprises vertically disposed width mid-board and depth direction mid-board, it is identical with furnace height that grand cross runs through the mid-board vertical direction, and width is identical with the furnace width and the degree of depth with depth direction.
It is membrane wall or tubular type wall that described grand cross runs through mid-board, is connected with working medium in the pipe from bottom to top.The tube pitch of described membrane wall or tubular type wall is 1.0～15 from the ratio of s and external diameter of pipe d.The tube surface of described membrane wall or tubular type wall is provided with fin.Described fin height is 0.5～2.5 with the ratio of tube outer diameter, and fin width is 0.001～0.5 with the ratio of tube outer diameter.Described width mid-board or depth direction mid-board are more than 1.
Band grand cross of the present invention runs through the boiler hearth of circulating fluidized bed of mid-board structure, and the mid-board structure that grand cross runs through is that two combs are arranged mutual orthogonal sets across structure, the physical strength height, and shock resistance is strong; Provide in burner hearth in the enough big heating surface area, mixing of materials is good in the stove, thereby has guaranteed the uniformity of material concentration, temperature and heat transfer in the burner hearth; Fin type surface texture mid-board heating surface increases the caloric receptivity that heat exchange is shielded by vertical expansion fin of burn-oning in the side, strengthens the heating surface heat transfer efficiency, and fin structure helps to alleviate impact and the wearing and tearing of the interior solid particle of stove to mid-board simultaneously.
Description of drawings
Fig. 1 runs through the membrane wall structure vertical view of the boiler hearth of circulating fluidized bed of mid-board structure for grand cross;
Fig. 2 is the structural representation of furnace chamber width of the present invention;
Fig. 3 is the structural representation of furnace depth direction of the present invention;
Fig. 4 is a tubular type wall construction schematic diagram of the present invention;
Fig. 5 is three membrane wall wall construction schematic diagrames of the present invention;
Fig. 6 is the schematic diagram of fin type mid-board structure of the present invention;
Fig. 7 is the schematic diagram of fin type surface texture of the present invention.
The specific embodiment
The boiler hearth of circulating fluidized bed that the band grand cross runs through the mid-board structure comprises air distribution plate 1, water-cooling wall 2, ceiling 3, boiler hearth of circulating fluidized bed 4, around the boiler hearth of circulating fluidized bed 4 is water-cooling wall 2, boiler hearth of circulating fluidized bed 4 upper ends are provided with ceiling 3, boiler hearth of circulating fluidized bed 4 lower ends are provided with air distribution plate 1, in boiler hearth of circulating fluidized bed 4, be provided with cross penetrating mid-board 5, cross penetrating mid-board 5 comprises vertically disposed width mid-board 6 and depth direction mid-board 7, it is identical with furnace height that grand cross runs through mid-board 5 vertical directions, and width is identical with the furnace width and the degree of depth with depth direction.Described grand cross runs through mid-board 5 and is membrane wall or tubular type wall, is connected with working medium in the pipe from bottom to top.The tube pitch of described membrane wall or tubular type wall is 1.0～15 from the ratio of s and external diameter of pipe d.The tube surface of described membrane wall or tubular type wall is provided with fin 9.Described fin 9 height are 0.5～2.5 with the ratio of tube outer diameter, and fin width is 0.001～0.5 with the ratio of tube outer diameter.Described width mid-board 6 or depth direction mid-board 7 are more than 1.
Referring to Fig. 1, Fig. 2, Fig. 3, the boiler hearth of circulating fluidized bed 4 that grand cross of the present invention runs through the mid-board structure comprises air distribution plate 1, water-cooling wall 2 and ceiling 3, is provided with the vertical grand cross with the burner hearth equal height between air distribution plate 1 and the ceiling 3 and runs through mid-board 5.Grand cross runs through mid-board 5 by the single face mid-board 6 of furnace chamber width and 7 mutual vertical compositions of single face mid-board of furnace depth direction.
Referring to Fig. 1, Fig. 4, grand cross runs through mid-board 5 can be made up of membrane wall, also can be made up of light pipe, is connected with working medium in the pipe from bottom to top; Referring to Fig. 4, the light-pipe structure grand cross runs through gap 8 between the pipe of mid-board and can be the space that bed material in the stove provides mixing, and tube pitch is 1.0～15 from the ratio s/d of s and external diameter of pipe d scope.
Referring to Fig. 1, Fig. 5, the boiler hearth of circulating fluidized bed 4 that described band grand cross runs through the mid-board structure can be monolithic or multi-disc at the single face mid-board 6 of furnace chamber width, can be monolithic or multi-disc at the single face mid-board 7 of furnace depth direction.
Referring to Fig. 1, Fig. 6, the surface texture that grand cross runs through mid-board 5 can be not finned membrane wall and light pipe, also can be fin surface texture 9.Referring to Fig. 7, the fin height is 0.5～2.5 with tube outer diameter than h/d scope, and fin width is 0.001～0.5 with tube outer diameter than b/d scope.
The boiler hearth of circulating fluidized bed that band grand cross of the present invention runs through the mid-board structure can select to adopt light pipe mid-board or membrane wall mid-board as required, in guaranteeing burner hearth under material concentration, temperature and the uniform prerequisite of heat transfer, for burner hearth provides enough big extended surface, solve the problem of maximization CFB boiler heating surface difficult arrangement.
Claims (6)
1. boiler hearth of circulating fluidized bed that runs through the mid-board structure with grand cross, comprise air distribution plate (1), water-cooling wall (2), ceiling (3), boiler hearth of circulating fluidized bed (4), boiler hearth of circulating fluidized bed (4) is water-cooling wall (2) all around, boiler hearth of circulating fluidized bed (4) upper end is provided with ceiling (3), boiler hearth of circulating fluidized bed (4) lower end is provided with air distribution plate (1), it is characterized in that: in boiler hearth of circulating fluidized bed (4), be provided with cross penetrating mid-board (5), cross penetrating mid-board (5) comprises vertically disposed width mid-board (6) and depth direction mid-board (7), it is identical with furnace height that grand cross runs through mid-board (5) vertical direction, and width is identical with the furnace width and the degree of depth with depth direction.
2. according to claim 1ly a kind ofly run through the boiler hearth of circulating fluidized bed of mid-board structure, it is characterized in that it is membrane wall or tubular type wall that described grand cross runs through mid-board (5), is connected with working medium from bottom to top in the pipe with grand cross.
3. according to claim 2ly a kind ofly run through the boiler hearth of circulating fluidized bed of mid-board structure with grand cross, the tube pitch that it is characterized in that described membrane wall or tubular type wall is 1.0～15 from the ratio of s and external diameter of pipe d.
4. according to claim 2ly a kind ofly run through the boiler hearth of circulating fluidized bed of mid-board structure, it is characterized in that the tube surface of described membrane wall or tubular type wall is provided with fin (9) with grand cross.
5. according to claim 4ly a kind ofly run through the boiler hearth of circulating fluidized bed of mid-board structure with grand cross, it is characterized in that the ratio of described fin (9) height and tube outer diameter is 0.5～2.5, fin width is 0.001～0.5 with the ratio of tube outer diameter.
6. according to claim 1ly a kind ofly run through the boiler hearth of circulating fluidized bed of mid-board structure, it is characterized in that described width mid-board (6) or depth direction mid-board (7) are more than 1 with grand cross.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910157102A CN101749697A (en) | 2009-12-22 | 2009-12-22 | Circulating fluidized bed boiler hearth with grand-cross penetrating middle wall structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910157102A CN101749697A (en) | 2009-12-22 | 2009-12-22 | Circulating fluidized bed boiler hearth with grand-cross penetrating middle wall structure |
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| CN101749697A true CN101749697A (en) | 2010-06-23 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102466223A (en) * | 2010-10-29 | 2012-05-23 | 中国科学院工程热物理研究所 | Circulating fluidized bed boiler |
| CN102537928A (en) * | 2012-01-16 | 2012-07-04 | 清华大学 | Hearth heating surface of supercritical boiler |
| CN103216822A (en) * | 2012-01-19 | 2013-07-24 | 中国科学院工程热物理研究所 | Circulating fluidized bed boiler having water cooling reinforcement structure |
| CN105276609A (en) * | 2015-11-16 | 2016-01-27 | 无锡华光锅炉股份有限公司 | Connecting device for partition walls in pulverized coal boiler of reheater |
| CN105299634A (en) * | 2015-11-25 | 2016-02-03 | 东方电气集团东方锅炉股份有限公司 | Supercritical circulating fluid bed boiler water wall having high flow stability under low load |
| CN105588121A (en) * | 2016-01-26 | 2016-05-18 | 山西国峰煤电有限责任公司 | Hearth temperature water-cooling control device for large circulating fluidized bed boiler |
| CN106123019A (en) * | 2016-06-29 | 2016-11-16 | 无锡锡能锅炉有限公司 | Gas fired-boiler water wall structure |
-
2009
- 2009-12-22 CN CN200910157102A patent/CN101749697A/en active Pending
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102466223A (en) * | 2010-10-29 | 2012-05-23 | 中国科学院工程热物理研究所 | Circulating fluidized bed boiler |
| CN102466223B (en) * | 2010-10-29 | 2014-08-20 | 中国科学院工程热物理研究所 | Circulating fluidized bed boiler |
| US10156354B2 (en) | 2010-10-29 | 2018-12-18 | Institute Of Engineering Thermophysics, Chinese Academy Of Sciences | Circulating fluidized bed boiler |
| CN102537928A (en) * | 2012-01-16 | 2012-07-04 | 清华大学 | Hearth heating surface of supercritical boiler |
| CN103216822A (en) * | 2012-01-19 | 2013-07-24 | 中国科学院工程热物理研究所 | Circulating fluidized bed boiler having water cooling reinforcement structure |
| CN105276609A (en) * | 2015-11-16 | 2016-01-27 | 无锡华光锅炉股份有限公司 | Connecting device for partition walls in pulverized coal boiler of reheater |
| CN105299634A (en) * | 2015-11-25 | 2016-02-03 | 东方电气集团东方锅炉股份有限公司 | Supercritical circulating fluid bed boiler water wall having high flow stability under low load |
| CN105299634B (en) * | 2015-11-25 | 2017-07-28 | 东方电气集团东方锅炉股份有限公司 | The supercritical circulating fluidized bed boiler water-cooling wall of high flow stability under underload |
| CN105588121A (en) * | 2016-01-26 | 2016-05-18 | 山西国峰煤电有限责任公司 | Hearth temperature water-cooling control device for large circulating fluidized bed boiler |
| CN106123019A (en) * | 2016-06-29 | 2016-11-16 | 无锡锡能锅炉有限公司 | Gas fired-boiler water wall structure |
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Open date: 20100623 |