CN102589000A - Boiler comprising water cooling system for variable-section hearth - Google Patents
Boiler comprising water cooling system for variable-section hearth Download PDFInfo
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- CN102589000A CN102589000A CN2012100587350A CN201210058735A CN102589000A CN 102589000 A CN102589000 A CN 102589000A CN 2012100587350 A CN2012100587350 A CN 2012100587350A CN 201210058735 A CN201210058735 A CN 201210058735A CN 102589000 A CN102589000 A CN 102589000A
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Abstract
The invention discloses a boiler comprising a water cooling system for a variable-section hearth. The boiler comprises a lower hearth and an upper hearth, the lower hearth is divided into a transitional area, a lower hearth body and an ash hopper from top to bottom, lower front and back walls, side walls and upper front and back walls are film walls, pipes and flat steel are combined to form the film walls, the water cooling system consists of spiral tubes and vertical tubes corresponding to the spiral tubes one by one, and the film walls of the lower hearth completely or partially consist of spiral tubes. The water cooling system in the boiler is simple in structure, flow rate of working media in the tubes is constant, and the problem that original flow in one tube is distributed into two or more tubes, mass velocity in each tube is reduced, and accordingly a cooling effect of the spiral tubes and corresponding vertical tubes is affected is avoided.
Description
Technical field
The present invention relates to a kind of boiler, particularly relate to a kind of boiler that comprises the water-cooling system that is used for the variable cross-section burner hearth.
Background technology
For super critical boiler, can safe and reliable operation for making boiler, need the temperature difference between restriction the highest metal temperature of water-cooling wall pipe and adjacent pipe.In the direct current stove under the supercritical pressure operation, do not have the differentiation of liquid phase and vapour phase, and medium temperature continues to increase.Owing to absorb photothermal inequality (by the pipe geometric position; Combustion heat release mode, the fire cleaning degree causes) with mass velocity difference (the fluid resistance difference of different pipes causes), caused the wall temperature difference of pipe; Excessive temperature differentials; To cause thermal stress to strengthen,, will cause tube leak as not adding restriction.As shown in Figure 1; The solution that is directed against this problem at non-variable cross-section burner hearth does; The higher zone of thermic load adopts helix tube as water-cooling system in the middle and lower part of burner hearth 1; The pipe 2 that makes every inclination is through different thermic load zones, and every pipe all absorbs approximately uniform heat like this, solves the uneven problem of heat absorption with this; On the other hand, under square one, helix tube has than mass velocity in the higher pipe of vertical tube (be generally 2～3 times, can regulate through spiral angle), even be heated and there is deviation in flow, high mass velocity still can guarantee the cooling effect of working medium to pipe.
Yet, for the boiler of variable cross-section burner hearth, because the scrambling of burner hearth shape is difficult to adopt spiral tube structure to guarantee rational performance design and structural design again.The angle of elevation of the pipe of helix tube needs according to irregular burner hearth shape respective change, and this has just caused the difficulty in the processing and manufacturing.
Before the alternation of cross-section; Change helix tube into vertical tube and can avoid the difficulty made; But as shown in Figure 2, if simply with the top of the helical form pipe 21 of helix tube by the skewed vertical configuration that becomes, tube pitch is from increasing greatly; Fin 3 can't effectively be cooled off, and causes water-cooling wall to cross cause thermal damage.If as shown in Figure 3, helical form pipe 22 epimeres of single helix tube are become two vertical tubes 23 (or many, can regulate through spiral angle x) through means such as threeways; Can solve tube pitch from excessive problem; But thing followed problem is, the flow in the single helical form pipe 22 is assigned in two or the many vertical tubes 23, must cause the decline of mass velocity in the pipe of water-cooling system; Influence is to the cooling effect of pipe; This structure only is only feasible in the lower zone of thermic load, and the section of burner hearth change generally occurs in the very high zone of thermic load, burner hearth middle and lower part, thereby this scheme also is infeasible.
Summary of the invention
The technical problem that the present invention will solve is that the variable cross-section burner hearth can't adopt the defective of helix tube as water-cooling system in the prior art in order to overcome, and a kind of boiler that comprises the water-cooling system that is used for the variable cross-section burner hearth is provided.
The present invention solves above-mentioned technical problem through following technical proposals:
A kind of boiler that comprises the water-cooling system that is used for the variable cross-section burner hearth, it comprises bottom front wall, bottom Hou Qiang, side wall, the lower furnace that is surrounded by wall and said side wall behind said bottom front wall, the bottom; Said bottom front wall extend upward constitute the top front wall, said bottom Hou Qiang extends upward and constitutes top Hou Qiang, the upper furnace that is surrounded by wall and said side wall behind said top front wall, the said top; Said lower furnace is divided into transition region, lower hearth and ash bucket from top to bottom; Wall all is the membrane wall by pipe and band steel be combined into behind said bottom front wall, said bottom Hou Qiang, said side wall, said top front wall and the said top, and its characteristics are: this water-cooling system comprise some helix tubes and corresponding one by one with said helix tube, be communicated with and upwardly extending vertical tube; The membrane wall of said lower furnace is all or part of to be helix tube.Said lower furnace is connected through the upper furnace that transition region and cross section diminish.
Wherein, the boundary of said helix tube and said vertical tube is positioned at the intersection of said transition region and said lower furnace.
Wherein, the boundary of said helix tube and said vertical tube is positioned at the intersection of said lower furnace and said upper furnace.
Wherein, the boundary of said helix tube and said vertical tube is arranged in said upper furnace.
Wherein, said water-cooling system also comprises some tube-carriers, and said tube-carrier and said vertical tube are provided with at interval.
Wherein, be injected with superheated steam, reheated steam or subcooled water in the said tube-carrier.
Among the present invention, but above-mentioned optimum condition combination in any on the basis that meets this area general knowledge promptly gets each preferred embodiment of the present invention.
Positive progressive effect of the present invention is: the water-cooling system in the boiler that comprises the water-cooling system that is used for the variable cross-section burner hearth of the present invention is simple in structure; And intraductal working medium flow unchanged; Avoid flow in the original pipe to be assigned in two or the many pipes, the decline of mass velocity influences the cooling effect of helix tube and corresponding vertical tube then in the pipe that causes.Further; Utilize the variation of the angle of adjacent helix tube adjacent channel, that is, the distance in the vertical tube between the adjacent pipe increases after helix tube changes vertical tube into; Therefore increase tube-carrier and make that distance and fin width diminish between these pipes; Heat in the absorption of fluids burner hearth in the tube-carrier, cooling spiral pipe, vertical tube and fin, thus guarantee their safe operation.
Description of drawings
Fig. 1 is the sketch map that adopts the helix tube water-cooling system in the non-variable cross-section burner hearth.
Fig. 2 is the simple structural representation that combines of helix tube and vertical tube.
Fig. 3 is the structural representation that helix tube and vertical tube boundary adopt threeway.
Fig. 4 is for using the side sectional view of the boiler of helix tube chilled water system in the variable cross-section burner hearth in the present invention's one preferred embodiment.
Fig. 5 is the enlarged drawing of the helix tube chilled water system in the boiler among Fig. 4.
The specific embodiment
Provide preferred embodiment of the present invention below in conjunction with accompanying drawing, to specify technical scheme of the present invention.
Shown in Figure 4 and 5, the boiler that comprises the water-cooling system that is used for the variable cross-section burner hearth of present embodiment comprises wall 102 behind bottom front wall 101, the bottom, side wall 103, the lower furnace 100 that is surrounded by wall behind this bottom front wall 101, this bottom 102 and side wall 103.Said bottom front wall 101 extends upward and constitutes top front wall 201, is extended upward to constitute wall 202 behind the top upper furnace 200 that is surrounded by wall behind top front wall 201, the top 202 and side wall 103 by wall behind the bottom 102.Said lower furnace 100 is divided into transition region 111, lower hearth 112 and ash bucket 113 from top to bottom.Behind said bottom front wall 101, the bottom behind wall 102, side wall 103 and top front wall 201, the top wall 202 all be membrane wall by pipe and band steel be combined into.Inwall at boiler is provided with water-cooling system, this water-cooling system comprise some by some helix tubes 31 and corresponding one by one with helix tube 31, be communicated with and upwardly extending vertical tube 32.The membrane wall of lower furnace 100 all is a helix tube 31.
In the present embodiment, the axis of helix tube 31 and the angle of horizontal plane are 30 °, and the spacing of the axis of adjacent helix tube 31 is 50mm, and the spacing that can be got adjacent vertical tube 32 by trigonometric function is 100mm.Those skilled in the art also can be according to actual needs change the spacing of adjacent vertical tube through the spacing of angle that changes axis and horizontal plane and adjacent helix tube.
In addition, between adjacent vertical tube 32, also be provided with tube-carrier 4.Fluid in the tube-carrier 4 can be superheated steam, reheated steam or subcooled water.Wherein, the high pressure cylinder steam discharge of steam turbine is caused boiler side with pipeline, get into heat exchange in the tube-carrier 4 then, get into the final reheater of boiler at last, all or part of low-temperature reheater that has substituted boiler in the routine techniques scheme of tube-carrier 4 this moment.Press the difference of tube-carrier 4 inner fluids, superheater, reheater or the economizer of boiler in the alternative prior art that tube-carrier 4 can be all or part of.
Though more than described the specific embodiment of the present invention, it will be understood by those of skill in the art that these only illustrate, protection scope of the present invention is limited appended claims.Those skilled in the art can make numerous variations or modification to these embodiments under the prerequisite that does not deviate from principle of the present invention and essence, but these changes and modification all fall into protection scope of the present invention.
Claims (6)
1. boiler that comprises the water-cooling system that is used for the variable cross-section burner hearth, it comprises bottom front wall, bottom Hou Qiang, side wall, the lower furnace that is surrounded by wall and said side wall behind said bottom front wall, the bottom; Said bottom front wall extend upward constitute the top front wall, said bottom Hou Qiang extends upward and constitutes top Hou Qiang, the upper furnace that is surrounded by wall and said side wall behind said top front wall, the said top; Said lower furnace is divided into transition region, lower hearth and ash bucket from top to bottom; Wall all is the membrane wall by pipe and band steel be combined into behind said bottom front wall, said bottom Hou Qiang, said side wall, said top front wall and the said top, it is characterized in that: this water-cooling system comprise some helix tubes and corresponding one by one with said helix tube, be communicated with and upwardly extending vertical tube; The membrane wall of said lower furnace is all or part of to be helix tube.
2. the boiler that comprises the water-cooling system that is used for the variable cross-section burner hearth as claimed in claim 1 is characterized in that the boundary of said helix tube and said vertical tube is positioned at the intersection of said transition region and said lower furnace.
3. the boiler that comprises the water-cooling system that is used for the variable cross-section burner hearth as claimed in claim 1 is characterized in that the boundary of said helix tube and said vertical tube is positioned at the intersection of said lower furnace and said upper furnace.
4. the boiler that comprises the water-cooling system that is used for the variable cross-section burner hearth as claimed in claim 1 is characterized in that the boundary of said helix tube and said vertical tube is arranged in said upper furnace.
5. like each described boiler that comprises the water-cooling system that is used for the variable cross-section burner hearth among the claim 1-4, it is characterized in that said water-cooling system also comprises some tube-carriers, said tube-carrier and said vertical tube are provided with at interval.
6. the boiler that comprises the water-cooling system that is used for the variable cross-section burner hearth as claimed in claim 5 is characterized in that, is injected with superheated steam, reheated steam or subcooled water in the said tube-carrier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210058735.0A CN102589000B (en) | 2012-03-07 | 2012-03-07 | Boiler comprising water cooling system for variable-section hearth |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210058735.0A CN102589000B (en) | 2012-03-07 | 2012-03-07 | Boiler comprising water cooling system for variable-section hearth |
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| Publication Number | Publication Date |
|---|---|
| CN102589000A true CN102589000A (en) | 2012-07-18 |
| CN102589000B CN102589000B (en) | 2014-04-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210058735.0A Active CN102589000B (en) | 2012-03-07 | 2012-03-07 | Boiler comprising water cooling system for variable-section hearth |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107906500A (en) * | 2017-12-28 | 2018-04-13 | 西安富凯能源科技有限责任公司 | A kind of spiral water-cooling wall construction of injection boiler |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4236835A1 (en) * | 1992-11-02 | 1994-05-05 | Siemens Ag | Steam generator |
| US5755188A (en) * | 1995-05-04 | 1998-05-26 | The Babcock & Wilcox Company | Variable pressure once-through steam generator furnace having all welded spiral to vertical tube transition with non-split flow circuitry |
| EP0810403B1 (en) * | 1994-12-16 | 2000-08-02 | Mitsubishi Jukogyo Kabushiki Kaisha | Steam generator |
| CN101586802A (en) * | 2009-06-23 | 2009-11-25 | 东方锅炉（集团）股份有限公司 | Water wall of monotube boiler |
| CN201425317Y (en) * | 2009-04-09 | 2010-03-17 | 安徽金鼎锅炉股份有限公司 | Membrane wall structure of waste heat boiler |
| CN202532527U (en) * | 2012-03-07 | 2012-11-14 | 上海锅炉厂有限公司 | Boiler including water-cooling system used in variable cross-section furnace chamber |
-
2012
- 2012-03-07 CN CN201210058735.0A patent/CN102589000B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4236835A1 (en) * | 1992-11-02 | 1994-05-05 | Siemens Ag | Steam generator |
| EP0810403B1 (en) * | 1994-12-16 | 2000-08-02 | Mitsubishi Jukogyo Kabushiki Kaisha | Steam generator |
| US5755188A (en) * | 1995-05-04 | 1998-05-26 | The Babcock & Wilcox Company | Variable pressure once-through steam generator furnace having all welded spiral to vertical tube transition with non-split flow circuitry |
| CN201425317Y (en) * | 2009-04-09 | 2010-03-17 | 安徽金鼎锅炉股份有限公司 | Membrane wall structure of waste heat boiler |
| CN101586802A (en) * | 2009-06-23 | 2009-11-25 | 东方锅炉（集团）股份有限公司 | Water wall of monotube boiler |
| CN202532527U (en) * | 2012-03-07 | 2012-11-14 | 上海锅炉厂有限公司 | Boiler including water-cooling system used in variable cross-section furnace chamber |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107906500A (en) * | 2017-12-28 | 2018-04-13 | 西安富凯能源科技有限责任公司 | A kind of spiral water-cooling wall construction of injection boiler |
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| CN102589000B (en) | 2014-04-09 |
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