CN103453547A - Different-wall water-cooled wall structure and medium circulating method - Google Patents
Different-wall water-cooled wall structure and medium circulating method Download PDFInfo
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- CN103453547A CN103453547A CN2013103994438A CN201310399443A CN103453547A CN 103453547 A CN103453547 A CN 103453547A CN 2013103994438 A CN2013103994438 A CN 2013103994438A CN 201310399443 A CN201310399443 A CN 201310399443A CN 103453547 A CN103453547 A CN 103453547A
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Abstract
The invention relates to a different-wall water-cooled wall structure and a medium circulating method. In a boiler structure, the arrangement of a screen type heating surface is limited by the width of a hearth and an overall structure of the boiler. The different-wall water-cooled wall structure comprises a tube panel assembly (6), wherein an upper pin tube assembly (3) and a lower pin tube assembly (4) are respectively arranged on end parts of the tube panel assembly; sealing devices are respectively arranged at wall-penetrating parts of the upper pin tube assembly and the lower pin tube assembly, and are respectively connected with an upper collecting box (1) and a lower collecting box (2); the upper collecting box and the lower collecting box are respectively connected with an ascending tube connector (8) and a descending tube connector (9); fixed devices are arranged at the upper collecting box and the lower collecting box; the upper collecting box and the lower collecting box are respectively fixed on the outer wall of a water-cooled wall of the boiler; the upper collecting box and the lower collecting box are respectively connected with the upper pin tube assembly or the lower pin tube assembly; the upper pin tube assembly or the lower pin tube assembly is arranged on a heating surface of a water-cooled screen. The different-wall water-cooled wall structure is applied in a different-wall water-cooled wall.
Description
technical field:
the present invention relates to a kind of different wall water wall structure and medium circulation method.
background technology:
in boiler design, after the boiler furnace section determination, in order to guarantee that boiler has enough evaporating heating surfaces, usually adopt following two kinds of modes, a kind of height that increases burner hearth, the boiler cost increases greatly, another kind is to add curtain wall at burner hearth, but the layout of curtain wall is subject to furnace width restriction and the integrally-built restriction of boiler, in the high pressure unit, curtain wall is most of for superheater surface, the invention of different wall water-cooling wall is exactly to solve in the situation that do not increase boiler height, roll up the long-pending effect of water wall surface, play the effect of boiler curtain wall, structure is processed than curtain wall simple and flexible.
summary of the invention:
the purpose of this invention is to provide a kind of different wall water wall structure and medium circulation method, can effectively expand the boiler water wall heating surface area in the situation that do not change the body construction of heating surface, meet boiler evaporating heating surface arrangement requirement, reduce furnace exit temperature, improve boiler efficiency.
the object of the present invention is achieved like this:
different wall water wall structure, its composition comprises: the tube panel assembly, the end of described tube panel assembly is respectively pin-fin tube assembly and lower pin-fin tube assembly, be provided with respectively at upper pin-fin tube assembly and lower pin-fin tube assembly place through walls the described sealing device that the sealing for guaranteeing flue gas in burner hearth is not revealed, described two sealing devices are connected with lower header with upper collecting chamber respectively, described upper collecting chamber is connected with the down-comer joint with the tedge joint respectively with lower header, described upper collecting chamber and lower header are equipped with fixture, described upper collecting chamber and lower header are separately fixed on the outer wall of boiler water wall, what with described upper collecting chamber, with lower header, be connected is respectively top pin-fin tube assembly or lower pin pipe assembly, described top pin-fin tube assembly or lower pin pipe assembly are mounted on the water-cooling screen heating surface in stove.
a kind of medium circulation method of different wall water-cooling wall, boiler feedwater enters in drum, in drum after equipment in pot carries out the carbonated drink separation, WATER AS FLOW MEDIUM process down-comer joint in drum and the tube connector be connected with down-comer enter different wall water-cooling wall lower header, then enter different wall water-cooling screen in stove through lower pin pipe assembly successively; Medium in stove in different wall panelized-tube-wall section in stove after overshoot and heat convection, medium upwards flows successively through top pin-fin tube assembly, upper collecting chamber and tedge joint are incorporated in drum, whole special-shaped tube panel, top pin-fin tube assembly, upper collecting chamber, fairlead, drum, down-comer, tube connector, lower header, relatively independent water-flow circuit of lower pin pipe module composition; Because medium water-cooling screen in stove is different with the density in down-comer, medium completes Natural Circulation in two pipes.
beneficial effect:
1. the present invention adopts different wall water wall structure outstanding in burner hearth, has effectively increased evaporating heating surface in stove, and simple in structure, easy for installation, cost is low, economic benefits.The present invention is applicable to various pulverized-coal fired boilers, fluidized-bed combustion boiler, oil-gas boiler, waste heat boiler etc.The present invention can effectively utilize the characteristics of heating surface, strengthens heat transfer efficiency, and delicate structure, reduce the characteristics such as boiler cost greatly.The invention of different wall water-cooling wall is exactly solution in the situation that do not increase boiler height, rolls up the long-pending effect of water wall surface, plays the effect of boiler curtain wall, and structure is processed than curtain wall simple and flexible.
2. the present invention effectively increases evaporating heating surface, and it is simple in structure, easy for installation, and metal consumption is little, and heating surface area increases obviously, and this heating surface is equipped with relatively independent water circulation system, to guarantee the work safety of water circulation.At the inner cast of this heating surface place through walls burner hearth abrasion-proof and refractory pouring material, burner hearth arranged outside sealing device is to guarantee the air-tightness of whole burner hearth.
3. the inboard of original water-cooling wall is according to the fixing many row's heating surface pipes of certain pitch, be arranged vertically in water-cooling wall, pipe is from the outside inside of introducing of heating surface, by upper and lower header, be connected, upper and lower header is fixed on water-cooling wall, special-shaped heating surface has independent water-flow circuit, can guarantee the safe water circulation of whole boiler.
4. the present invention effectively solves the wear problem of structure own, improves boiler efficiency.The present invention does not change boiler height when the boiler integral arrangement, does not change the boiler furnace cross section and increases boiler evaporating heating surface area.Boiler heating surface structural elasticity of the present invention is beneficial to well deashing, and the heat transfer coefficient of heat-transfer area is large.The present invention is simple in structure, compact, soldered is few, and the metal wastage of its unit heat exchange area is less.The present invention can obtain maximum heating surface income in the situation that drop into minimum metal consumption.
in boiler operatiopn, this different wall water-cooling wall and common water-cooling wall are slightly variant on wall temperature.The sealing device not only can play the effect of flue gas sealing, can also absorb different wall water-cooling wall and the common water-cooling wall of boiler in the horizontal direction with vertical direction on the small expansion that causes because of the wall temperature fine difference.Between pin-fin tube assembly and upper and lower water-cooling wall header, with different many radical spaces bend pipes, connect respectively.Select many special-shaped space bent pipes, structural needs still not, flexibly connect together with increasing between can also the parts larger in rigidity such as water-cooling screen and headers, more is conducive to the long-term stability operation of boiler.Because different wall water-cooling wall is in boiler furnace, when it is subject to washing away of the interior air-flow of burner hearth, also be subject to strong radiant heat transfer.For the safety of the water-flow circuit that guarantees different wall water-cooling wall, the different wall water-cooling wall of every a slice has own independent water-flow circuit, and the intraductal working medium mass velocity is through calculating in detail.Aspect intensity, at first calculate the wall temperature of different wall water screen tube, calculate the wall thickness of pipe according to the yield limit at wall temperature and this temperature, guarantee that with this different wall water screen tube is qualified aspect intensity.Be arranged in stove because different wall water-cooling wall is outstanding, when obtaining good heat-transfer effect, also can bring very serious wear problem, wearing and tearing especially occur in the horizontal segment at place through walls in stove.For solving this wear problem, adopted upper and lower pin-fin tube assembly in horizontal segment in burner hearth, after boiler and the installation of different wall water-cooling wall, at upper and lower pin-fin tube device region cast abrasion-proof and refractory pouring material, in the segment smoothing transition that finishes of castable, to prevent the wearing and tearing of transitional region.
during the present invention uses, its temperature equals the saturation temperature under its operating pressure.Such layout can make in the situation that do not increase section of burner hearth and boiler is high, to increase the evaporating heating surface area of boiler.
the accompanying drawing explanation:
accompanying drawing 1 is front view of the present invention.In figure, 1 is that upper collecting chamber, 2 is that lower header, 3 is that upper pin-fin tube assembly, 4 is that lower pin-fin tube assembly, 5 is that sealing device, 6 is that tube panel assembly, 7 is that fixture, 8 is that tedge joint, 9 is the down-comer joint.
accompanying drawing 2 is sectional views of accompanying drawing 1.
the specific embodiment:
embodiment 1:
different wall water wall structure, its composition comprises: different wall water wall structure, its composition comprises: tube panel assembly 6, the end of described tube panel assembly is respectively pin-fin tube assembly 3 and lower pin-fin tube assembly 4, be provided with respectively at upper pin-fin tube assembly and lower pin-fin tube assembly place through walls the described sealing device 4 that the sealing for guaranteeing flue gas in burner hearth is not revealed, described two sealing devices are connected with lower header 2 with upper collecting chamber 1 respectively, described upper collecting chamber is connected with down-comer joint 9 with tedge joint 8 respectively with lower header, described upper collecting chamber and lower header are equipped with fixture 7, described upper collecting chamber and lower header are separately fixed on the outer wall of boiler water wall, what with described upper collecting chamber, with lower header, be connected is respectively top pin-fin tube assembly or lower pin pipe assembly, described top pin-fin tube assembly or lower pin pipe assembly are mounted on the water-cooling screen heating surface in stove.
embodiment 2:
the medium circulation method of different wall water-cooling wall, boiler feedwater enters in drum, in drum after equipment in pot carries out the carbonated drink separation, WATER AS FLOW MEDIUM process down-comer joint in drum and the tube connector be connected with down-comer enter different wall water-cooling wall lower header, then enter different wall water-cooling screen in stove through lower pin pipe assembly successively; Medium in stove in different wall panelized-tube-wall section in stove after overshoot and heat convection, medium upwards flows successively through top pin-fin tube assembly, upper collecting chamber and tedge joint are incorporated in drum, whole special-shaped tube panel, top pin-fin tube assembly, upper collecting chamber, fairlead, drum, down-comer, tube connector, lower header, relatively independent water-flow circuit of lower pin pipe module composition; Because medium water-cooling screen in stove is different with the density in down-comer, medium completes Natural Circulation in two pipes.For guaranteeing the safe operation of boiler and different wall water-cooling wall, wall temperature, intensity and the mass of medium flow velocity of water-cooling screen in stove all passed through to strict calculating in detail.
Claims (2)
1. a different wall water wall structure, its composition comprises: the tube panel assembly, it is characterized in that: the end of described tube panel assembly is respectively pin-fin tube assembly and lower pin-fin tube assembly, be provided with respectively at upper pin-fin tube assembly and lower pin-fin tube assembly place through walls the described sealing device that the sealing for guaranteeing flue gas in burner hearth is not revealed, described two sealing devices are connected with lower header with upper collecting chamber respectively, described upper collecting chamber is connected with the down-comer joint with the tedge joint respectively with lower header, described upper collecting chamber and lower header are equipped with fixture, described upper collecting chamber and lower header are separately fixed on the outer wall of boiler water wall, what with described upper collecting chamber, with lower header, be connected is respectively top pin-fin tube assembly or lower pin pipe assembly, described top pin-fin tube assembly or lower pin pipe assembly are mounted on the water-cooling screen heating surface in stove.
2. the medium circulation method of a different wall water-cooling wall, it is characterized in that: boiler feedwater enters in drum, in drum after equipment in pot carries out the carbonated drink separation, WATER AS FLOW MEDIUM process down-comer joint in drum and the tube connector be connected with down-comer enter different wall water-cooling wall lower header, then enter different wall water-cooling screen in stove through lower pin pipe assembly successively; Medium in stove in different wall panelized-tube-wall section in stove after overshoot and heat convection, medium upwards flows successively through top pin-fin tube assembly, upper collecting chamber and tedge joint are incorporated in drum, whole special-shaped tube panel, top pin-fin tube assembly, upper collecting chamber, fairlead, drum, down-comer, tube connector, lower header, relatively independent water-flow circuit of lower pin pipe module composition; Because medium water-cooling screen in stove is different with the density in down-comer, medium completes Natural Circulation in two pipes.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105627353A (en) * | 2015-12-30 | 2016-06-01 | 青岛安装建设股份有限公司 | Scribing installation technology for boiler film water-cooled walls |
| CN106152115A (en) * | 2015-04-23 | 2016-11-23 | 中国科学院工程热物理研究所 | Curtain wall and the boiler hearth of circulating fluidized bed of band curtain wall |
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| CN2361970Y (en) * | 1998-10-16 | 2000-02-02 | 夏正 | Natural circulation sulphur acid-producing waste heat boiler with horizontal water-tube membrane wall |
| CN2356159Y (en) * | 1998-12-30 | 1999-12-29 | 青岛旭日节能设备有限公司 | Collecting and comprehensive utilizing device for heat energy |
| CN101311622A (en) * | 2007-05-21 | 2008-11-26 | 张家港海陆锅炉有限公司 | Evaporator of high-temperature high pressure natural circulation dry quenching coke waste heat boiler |
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| CN106152115A (en) * | 2015-04-23 | 2016-11-23 | 中国科学院工程热物理研究所 | Curtain wall and the boiler hearth of circulating fluidized bed of band curtain wall |
| CN106152115B (en) * | 2015-04-23 | 2018-07-10 | 中国科学院工程热物理研究所 | Curtain wall and the boiler hearth of circulating fluidized bed with curtain wall |
| CN105627353A (en) * | 2015-12-30 | 2016-06-01 | 青岛安装建设股份有限公司 | Scribing installation technology for boiler film water-cooled walls |
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Application publication date: 20131218 |
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