CN102589000B - 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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- CN102589000B CN102589000B CN201210058735.0A CN201210058735A CN102589000B CN 102589000 B CN102589000 B CN 102589000B CN 201210058735 A CN201210058735 A CN 201210058735A CN 102589000 B CN102589000 B CN 102589000B
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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 comprising for the water-cooling system of variable cross-section burner hearth.
Background technology
For super critical boiler, for making the boiler can safe and reliable operation, need to limit the temperature difference between the highest metal temperature of water-cooling wall pipe and adjacent pipe.In Once-through Boiler under supercritical pressure operation, there is no the differentiation of liquid phase and vapour phase, and medium temperature continues to increase.Because the inequality of radiation-absorbing heat is (by pipe geometric position, combustion heat release mode, fire cleaning degree causes) and mass velocity difference (the fluid resistance difference of different pipes causes), the wall temperature difference that has caused pipe, excessive temperature differentials, to cause thermal stress to strengthen, as without restriction, will cause tube leak.As shown in Figure 1, at non-variable cross-section burner hearth, for the solution of this problem, be, in the higher region of the middle and lower part of burner hearth 1 thermic load, adopt helix tube as water-cooling system, make the pipe 2 of every inclination by different thermic load regions, every pipe all absorbs approximately uniform heat like this, with this, solves the problem of heat absorption inequality; 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 by spiral angle), even if be heated, have deviation with 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, due to the scrambling of burner hearth shape, be difficult to adopt again spiral tube structure to guarantee rational performance design and structural design.The angle of elevation of the pipe of helix tube need be according to irregular burner hearth shape respective change, and this has just caused the difficulty in processing and manufacturing.
Before the alternation of cross-section, change helix tube into vertical tube and can avoid the difficulty of manufacturing, but as shown in Figure 2, if simple by the top of the helical form pipe 21 of helix tube from the skewed vertical configuration that becomes, tube pitch is from greatly increasing, fin 3 cannot obtain effectively cooling, 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 to (or many of two vertical tubes 23 by means such as threeways, can regulate by spiral angle x), can solve tube pitch from excessive problem, but thing followed problem is, flow in single helical form pipe 22 is assigned in two or many vertical tubes 23, must cause the decline of the interior mass velocity of pipe of water-cooling system, the cooling effect of impact to pipe, this structure is only only feasible in the lower region of thermic load, and section of burner hearth change generally occurs in the very high region of thermic load, burner hearth middle and lower part, thereby this scheme is also infeasible.
Summary of the invention
The technical problem to be solved in the present invention is cannot adopt helix tube as the defect of water-cooling system in order to overcome variable cross-section burner hearth in prior art, and a kind of boiler comprising for the water-cooling system of variable cross-section burner hearth is provided.
The present invention solves above-mentioned technical problem by following technical proposals:
Comprise the boiler for the water-cooling system of variable cross-section burner hearth, it comprises bottom front wall, bottom Hou Qiang, side wall, by the lower furnace that behind described bottom front wall, bottom, wall and described side wall surround; Described bottom front wall extends upward formation top front wall, described bottom Hou Qiang extends upward and forms top Hou Qiang, by the upper furnace that behind described top front wall, described top, wall and described side wall surround; Described lower furnace is divided into transition region, lower hearth and ash bucket from top to bottom, the equal membrane wall for being combined into by pipe and band steel of wall behind described bottom front wall, described bottom Hou Qiang, described side wall, described top front wall and described top, its feature is: this water-cooling system comprise some helix tubes and with described helix tube one by one corresponding, be communicated with and upwardly extending vertical tube; The membrane wall of described lower furnace is all or part of helix tube.The upper furnace that described lower furnace diminishes with cross section by transition region is connected.
Wherein, the boundary of described helix tube and described vertical tube is positioned at the intersection of described transition region and described lower furnace.
Wherein, the boundary of described helix tube and described vertical tube is positioned at the intersection of described lower furnace and described upper furnace.
Wherein, the boundary of described helix tube and described vertical tube is arranged in described upper furnace.
Wherein, described water-cooling system also comprises some tube-carriers, and described tube-carrier and described vertical tube interval arrange.
Wherein, in described tube-carrier, be injected with superheated steam, reheated steam or subcooled water.
In the present invention, above-mentioned optimum condition can be combined on the basis that meets this area general knowledge, obtains each preferred embodiment of the present invention.
Positive progressive effect of the present invention is: of the present invention comprise for the water cooling system structure in the boiler of the water-cooling system of variable cross-section burner hearth simple, and intraductal working medium flow is constant, avoid flow in an original pipe to be assigned in two or many pipes, in the pipe causing, the decline of mass velocity affects the cooling effect of helix tube and corresponding vertical tube then.Further, utilize the variation of the angle of adjacent helix tube adjacent channel,, distance in vertical tube between adjacent pipe increases after helix tube changes vertical tube into, therefore increasing tube-carrier diminishes distance and fin width between these pipes, heat in absorption of fluids burner hearth in tube-carrier, cooling spiral pipe, vertical tube and fin, thus guarantee their safe operation.
Accompanying drawing explanation
Fig. 1 adopts the schematic diagram of helix tube water-cooling system in non-variable cross-section burner hearth.
Fig. 2 is the structural representation of helix tube and the simple combination of vertical tube.
Fig. 3 is the structural representation that helix tube and vertical tube boundary adopt threeway.
Fig. 4 applies the side sectional view of the boiler of helix tube chilled water system in variable cross-section burner hearth in a preferred embodiment of the present invention.
Fig. 5 is the enlarged drawing of the helix tube chilled water system in the boiler in Fig. 4.
The specific embodiment
Below in conjunction with accompanying drawing, provide preferred embodiment of the present invention, to describe technical scheme of the present invention in detail.
As shown in Figures 4 and 5, the boiler for the water-cooling system of variable cross-section burner hearth of comprising of the present embodiment comprises wall 102 behind bottom front wall 101, bottom, side wall 103, the lower furnace 100 being surrounded by wall behind this bottom front wall 101, this bottom 102 and side wall 103.Described bottom front wall 101 extends upward and forms top front wall 201, by wall behind bottom 102, is extended upward and is formed wall 202 behind top, the upper furnace 200 being surrounded by wall behind top front wall 201, top 202 and side wall 103.Described lower furnace 100 is divided into transition region 111, lower hearth 112 and ash bucket 113 from top to bottom.The equal membrane wall for being combined into by pipe and band steel of wall 202 behind wall 102, side wall 103 and top front wall 201, top behind described bottom front wall 101, bottom.Inwall at boiler is provided with water-cooling system, this water-cooling system comprise some by some helix tubes 31 and with helix tube 31 one by one corresponding, be communicated with and upwardly extending vertical tube 32.The membrane wall of lower furnace 100 is all 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 obtained adjacent vertical tube 32 by trigonometric function is 100mm.Those skilled in the art also can change the spacing of adjacent vertical tube according to actual needs by changing axis and the angle of horizontal plane and the spacing of adjacent helix tube.
In addition, between adjacent vertical tube 32, be also provided with tube-carrier 4.Fluid in tube-carrier 4 can be superheated steam, reheated steam or subcooled water.Wherein, the high pressure cylinder steam discharge of steam turbine is caused to boiler side with pipeline, then enter the interior heat exchange of tube-carrier 4, finally enter the final reheater of boiler, the low-temperature reheater that has substituted boiler in routine techniques scheme that now tube-carrier 4 is all or part of.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.
Although 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 by appended claims.Those skilled in the art is not deviating under the prerequisite of principle of the present invention and essence, can make various changes or modifications to these embodiments, but these changes and modification all fall into protection scope of the present invention.
Claims (5)
1. comprise the boiler for the water-cooling system of variable cross-section burner hearth, it comprises bottom front wall, bottom Hou Qiang, side wall, by the lower furnace that behind described bottom front wall, bottom, wall and described side wall surround; Described bottom front wall extends upward formation top front wall, described bottom Hou Qiang extends upward and forms top Hou Qiang, by the upper furnace that behind described top front wall, described top, wall and described side wall surround; Described lower furnace is divided into transition region, lower hearth and ash bucket from top to bottom, the equal membrane wall for being combined into by pipe and band steel of wall behind described bottom front wall, described bottom Hou Qiang, described side wall, described top front wall and described top, is characterized in that: this water-cooling system comprise some helix tubes and with described helix tube one by one corresponding, be communicated with and upwardly extending vertical tube; The membrane wall of described lower furnace is all or part of helix tube; Described water-cooling system also comprises some tube-carriers, and described tube-carrier and described vertical tube interval arrange; One end of described tube-carrier is communicated with the high pressure cylinder of steam turbine with pipeline, and the other end of described tube-carrier is communicated with the final reheater of boiler.
2. the boiler comprising for the water-cooling system of variable cross-section burner hearth as claimed in claim 1, is characterized in that, the boundary of described helix tube and described vertical tube is positioned at the intersection of described transition region and described lower hearth.
3. the boiler comprising for the water-cooling system of variable cross-section burner hearth as claimed in claim 1, is characterized in that, the boundary of described helix tube and described vertical tube is positioned at the intersection of described lower furnace and described upper furnace.
4. the boiler comprising for the water-cooling system of variable cross-section burner hearth as claimed in claim 1, is characterized in that, the boundary of described helix tube and described vertical tube is arranged in described upper furnace.
5. the boiler comprising for the water-cooling system of variable cross-section burner hearth as claimed in claim 1, is characterized in that, is injected with superheated steam, reheated steam or subcooled water in described 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 |
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| CN102589000A CN102589000A (en) | 2012-07-18 |
| CN102589000B true CN102589000B (en) | 2014-04-09 |
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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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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
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| CN102589000A (en) | 2012-07-18 |
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