CN101586802B - Water wall of monotube boiler - Google Patents
Water wall of monotube boiler Download PDFInfo
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- CN101586802B CN101586802B CN2009100596998A CN200910059699A CN101586802B CN 101586802 B CN101586802 B CN 101586802B CN 2009100596998 A CN2009100596998 A CN 2009100596998A CN 200910059699 A CN200910059699 A CN 200910059699A CN 101586802 B CN101586802 B CN 101586802B
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Abstract
The invention discloses a water wall of a monotube boiler, comprising a water wall with a spiral lower part and a water wall with a vertical upper part, wherein the water wall with the spiral lower part and the water wall with the vertical upper part are transited by a once intermediate transition collection tank. The water wall structure provided by the invention has a simple water wall structure; the intermediate transition segment has no lead-in and lead-out connecting tubes; the water wall with the spiral lower part and the water wall with the vertical upper part are transited by a once intermediate transition collection tank; the structure of the hanging device of the intermediate transition segment is simplified; and the manufacture and installation cost are low.
Description
Technical field
The present invention relates to the heating surface loop structure of water-cooling wall (evaporating surface is heated), particularly a kind of water wall of monotube boiler of direct current cooker.
Background technology
Water also all becomes superheated steam by economizer, evaporating heating surface (water-cooling wall), superheater in proper order in direct current cooker.Existing water wall of monotube boiler version as depicted in figs. 1 and 2, wherein Fig. 1 represents the pipeline annexation of water-cooling wall, Fig. 2 represents the arrangement of the pipeline of water-cooling wall.Water-cooling wall comprises bottom spiral water-cooling wall, before the top, side water wall and top rear water wall, its middle and upper part rear water wall is hung pipe and is directly introduced from water-cooling wall inlet collection case 1, via bottom spiral water-cooling wall 3a, upper vertical hangs pipe 3b and outlet connecting pipe 24 enters into water-cooling wall outlet mixing header 25, this kind structure helps hanging pipe carrying and hydrophobic, but mix or pressure balance without crossing in the middle of the different pipes in this loop, deviation is big, obtain enough coolings in order to make top hang pipe 3b, the mass velocity of this bottom, loop 3a will be obviously higher than all the other bottom spiral water screen tubes, cause steam temperature and wall temperature deviation between the water screen tube in water-cooling wall high heat load district, bottom all to strengthen, weakened the bottom and adopted all advantages comparatively uniformly of spiral water-cooling wall steam temperature and wall temperature; In order to reduce its adverse effect for spiral water screen tube 2 as far as possible, hanging pipe 3b pipe radical can not be many, and single carrying of hanging pipe is big, and the pipe wall thickness is thick partially, has strengthened the wall thickness thermal resistance of hanging pipe, and wall temperature is higher, has limited to hang tube material and select for use.
Water wall structure form shown in Fig. 1 and Fig. 2, except 3a, before, side and rear water wall be provided with in the middle of mixing header 6, owing to introduce the bigger not heating section of pipeline 90 these differences in height that can occur the horizontal flue outlet at bottom collection case process as shown in Figure 2 from middle mixing header 6, so before the top, side water wall need adopt the higher quality flow velocity, to prevent that stagnating from appearring when the underload in the cold wall of upper water (especially water bag wall), this structure causes the pressure drop of top water-cooling wall higher, and the steam temperature deviation of steam side is also bigger than normal.And the tube connector piping (as shown in Figure 3) of the middle transition section of this kind water wall structure is all comparatively complicated with relevant erecting by overhang, and manufacturing and installation cost are higher.
Summary of the invention
The objective of the invention is:, provide between a kind of spiral water screen tube to have a narrow range of temperature and water wall of monotube boiler simple for structure at deficiency of the prior art.
Technical scheme of the present invention is:
A kind of water wall of monotube boiler, comprise bottom spiral water-cooling wall and upper vertical water-cooling wall, it is characterized in that: directly carry out transition between bottom spiral water-cooling wall and the upper vertical water-cooling wall by the middle transition mixing header, described upper vertical water-cooling wall comprises front water wall, both walls water-cooling wall and rear water wall, front water wall is by front wall middle transition mixing header and bottom spiral water-cooling wall transition, the both walls water-cooling wall is by both walls middle transition mixing header and bottom spiral water-cooling wall transition, rear water wall is by back wall middle transition mixing header and bottom spiral water-cooling wall transition, front wall middle transition mixing header, being provided with the pressure balance tube connector between both walls middle transition mixing header and the back wall middle transition mixing header is communicated with, described water wall of monotube boiler also comprises water-cooling wall outlet mixing header, the upper vertical water-cooling wall is communicated to water-cooling wall outlet mixing header by pipe-line system, front water wall is introduced water-cooling wall outlet mixing header via front wall outlet collection case and front wall outlet connecting pipe, the both walls water-cooling wall is introduced water-cooling wall outlet mixing header via both walls outlet collection case and both walls outlet connecting pipe, bag wall water-cooling wall at the bottom of wall furnace arch, furnace nose water-cooling wall and the horizontal flue after described rear water wall comprises; Bag wall water-cooling wall and horizontal flue outlet at bottom collection case are communicated with successively at the bottom of back wall middle transition mixing header, back wall furnace arch, furnace nose water-cooling wall, the horizontal flue, horizontal flue outlet at bottom collection case is divided into following two-way line branching and imports water-cooling wall outlet mixing header then: first branch comprises that the tube connector, the Hou Qiang that are communicated with successively with horizontal flue outlet at bottom collection case hang tube inlet collection case, Hou Qiang hangs pipe, hangs pipe outlet collection case, introduces water-cooling wall and exports mixing header by hanging the pipe outlet connecting pipe; Second branch comprises that the side water bag wall that is communicated with successively with horizontal flue outlet at bottom collection case is introduced tube connector, side water bag wall inlet collects case, side water bag wall, side water bag wall outlet collection case, introduces water-cooling wall outlet mixing header by side water bag wall outlet connecting pipe.
Supplementary technology scheme of the present invention is as follows:
Preferably, the middle transition mixing header is positioned at wall furnace arch, furnace nose water-cooling wall below, back, and all pipelines of bottom spiral water-cooling wall are all more than burner hearth 1 circle.
Preferably, back wall furnace arch, furnace nose water-cooling wall bottom is fixed on the back wall via suspension rod and hangs on the tube inlet collection case.
The invention has the beneficial effects as follows:
The water wall structure form that the present invention adopts is simple, the middle transition section is not with and is introduced and draw tube connector, carry out transition by a middle transition mixing header between bottom spiral water-cooling wall and the upper vertical water-cooling wall, middle transition segment structure erecting by overhang is also greatly simplified, and manufacturing and installation cost are low.
Be communicated with the pressure balance effect of playing by intermediate pressure balance tube connector between the transition mixing header of each metope.
The water wall structure form that the present invention adopts, all more than burner hearth 1 circle, institute is all very similar with the heat absorption situation through the path for all pipes of bottom water-cooling wall, and assignment of traffic is more even, so the outlet of spiral water-cooling wall has a narrow range of temperature, reduce thermal stress between the pipe in the spiral water-cooling wall zone.
The water wall structure form that the present invention adopts, upper side water bag wall is introduced from end bag wall outlet collection case, cancelled the very big not heating section of pipeline 90 these differences in height among Fig. 2, water wall structure form of the present invention adopts the tube connector that pipeline 16 these differences in height are very little among Fig. 5 to replace, its shared differential static pressure proportion is minimum, avoided side water bag wall the possibility of stagnating to occur, so the top water-cooling wall does not need to adopt very high mass velocity, but pipe wall thickness attenuate, reduced the pressure drop of upper vertical water-cooling wall effectively, and the reduction of mass velocity makes the steam temperature deviation of steam side reduce in the pipe, and the reduction of wall thickness thermal resistance has also remedied weakening of the mass velocity decline inwall coefficient of heat transfer.
The water wall structure form that the present invention adopts, it is more flexible that back wall is hung the pipe radical of pipe, can increase the pipe radical to alleviate single load capacity, and single wall thickness and corresponding thermal resistance of hanging pipe also reduces, and the pipe selection is flexible.
The present invention will illustrate by example and with reference to the mode of accompanying drawing, wherein:
Fig. 1 is existing boiler water wall version annexation schematic diagram.
Fig. 2 is a water wall structure arranged in form schematic diagram shown in Figure 1.
Fig. 3 is the pipeline connection diagram of existing boiler water wall shown in Figure 1 middle and lower part spiral water-cooling wall and upper vertical water-cooling wall changeover portion.
Description of drawings
Fig. 4 is the water wall of monotube boiler version annexation schematic diagram of the embodiment of the invention.
Fig. 5 is that water wall of monotube boiler version shown in Figure 4 is arranged schematic diagram.
Fig. 6 is the changeover portion stereogram of present embodiment.
Fig. 7 is a water wall of monotube boiler rear water wall part hanging structure schematic diagram shown in Figure 4.
Specific embodiments of the invention, a kind of direct current cooker water-cooling wall, adopt Fig. 4 and water wall structure form shown in Figure 5, comprise bottom helical water-cooled wall and top vertical water wall, directly carry out transition by transition mixing header in the middle of once between bottom helical water-cooled wall and the top vertical water wall. Wherein: after whole working medium of bottom helical water-cooled wall entrance header 1 enter the 2 even heat absorptions of bottom helical water-cooled wall pipe, transition mixing header 4a～4d in the middle of entering, for the pressure between each middle transition mixing header of balance, be communicated with by intermediate equilibria pipe 3 between middle transition mixing header 4a～4d, the stereochemical structure of present embodiment as shown in Figure 6.
On the basis of above-described embodiment, preferably, enter water-cooling wall outlet header at the top water-cooling wall via two flow paths via the working medium of transition mixing header 4a～4d in the middle of each metope:
Article one, approach: the working medium of transition mixing header 4a～4c enters water-cooling wall outlet mixing header 21 via side wall 5a～5c, front side wall outlet header 6a～6c before the vertical water wall of top and front side wall outlet tube connector 7 respectively in the middle of the front side wall;
The second approach: wall furnace arch, furnace nose water-cooling wall 8 after working medium is all introduced in the transition header 4d in the middle of the rear wall, enter horizontal flue outlet at bottom header 10 via bag wall water-cooling wall at the bottom of the horizontal flue 9 is laggard, be divided into then following two-way branch and import water-cooling wall outlet header 21:
The specific embodiment
First branch is that wall was hung tube inlet collection case 12 after overwhelming majority back wall working medium was introduced by the tube connector 11 that is positioned at the horizontal flue below, after hanging pipe 13 by the back wall successively and hanging pipe outlet collection case 14, introduce water-cooling wall outlet collection case 21 by hanging pipe outlet connecting pipe 15; Second branch is that wall working medium is introduced tube connector 16 introducing side water bag wall inlet collection casees 17 by being positioned at side water bag wall behind the remainder; The working medium of side water bag wall inlet collection case 17 successively enters water-cooling wall outlet mixing header 21 via side water bag wall 18, side water bag wall outlet collection case 19 and side water bag wall outlet connecting pipe 20.
Improved water wall structure form on the basis of the foregoing description, spiral water screen tube 2 all pipes in bottom are more than burner hearth 1 circle, make that institute is all very similar with the heat absorption situation through the path, assignment of traffic is more even, so the outlet of spiral water-cooling wall has a narrow range of temperature, and has reduced thermal stress between the pipe in the spiral water-cooling wall zone.
This water wall structure form, upper side water bag wall 18 is introduced from end bag wall outlet collection case 10, avoided side water bag wall 18 possibility of stagnating to occur, the MCR mass velocity of top water-cooling wall is reduced to about 60% of existing structure, the pipe wall thickness reduction has reduced the pressure drop of upper vertical water-cooling wall effectively.
Improved water wall structure form on the foregoing description basis, its erecting by overhang is simplified, the weight of the water wall structure bottom spiral water-cooling wall then suspension rod that passes through by as shown in Figure 7 is delivered to the top water-cooling wall and hangs pipe, and promptly back wall furnace arch, furnace nose water-cooling wall bottom is fixed on the back wall via suspension rod and hangs on the tube inlet collection case.It is flexible that such hanging structure, back wall are hung the pipe radical of pipe, can increase the pipe radical to alleviate single load capacity, and single wall thickness and corresponding thermal resistance of hanging pipe also reduces, and the pipe selection is flexible.
Disclosed all features in this specification, or the step in disclosed all methods or the process except mutually exclusive feature and/or step, all can make up by any way.
Disclosed arbitrary feature in this specification (comprising any accessory claim, summary and accompanying drawing) is unless special narration all can be replaced by other equivalences or the alternative features with similar purpose.That is, unless special narration, each feature is an example in a series of equivalences or the similar characteristics.
The present invention is not limited to the aforesaid specific embodiment.The present invention expands to any new feature or any new combination that discloses in this manual, and the arbitrary new method that discloses or step or any new combination of process.
Claims (3)
1. water wall of monotube boiler, comprise bottom spiral water-cooling wall and upper vertical water-cooling wall, it is characterized in that: directly carry out transition between bottom spiral water-cooling wall and the upper vertical water-cooling wall by the middle transition mixing header, described upper vertical water-cooling wall comprises front water wall, both walls water-cooling wall and rear water wall, front water wall is by front wall middle transition mixing header and bottom spiral water-cooling wall transition, the both walls water-cooling wall is by both walls middle transition mixing header and bottom spiral water-cooling wall transition, rear water wall is by back wall middle transition mixing header and bottom spiral water-cooling wall transition, front wall middle transition mixing header, being provided with the pressure balance tube connector between both walls middle transition mixing header and the back wall middle transition mixing header is communicated with, described water wall of monotube boiler also comprises water-cooling wall outlet mixing header, the upper vertical water-cooling wall is communicated to water-cooling wall outlet mixing header by pipe-line system, front water wall is introduced water-cooling wall outlet mixing header via front wall outlet collection case and front wall outlet connecting pipe, the both walls water-cooling wall is introduced water-cooling wall outlet mixing header via both walls outlet collection case and both walls outlet connecting pipe, bag wall water-cooling wall at the bottom of wall furnace arch, furnace nose water-cooling wall and the horizontal flue after described rear water wall comprises; Bag wall water-cooling wall and horizontal flue outlet at bottom collection case are communicated with successively at the bottom of back wall middle transition mixing header, back wall furnace arch, furnace nose water-cooling wall, the horizontal flue, horizontal flue outlet at bottom collection case is divided into following two-way line branching and imports water-cooling wall outlet mixing header then: first branch comprises that the tube connector, the Hou Qiang that are communicated with successively with horizontal flue outlet at bottom collection case hang tube inlet collection case, Hou Qiang hangs pipe, hangs pipe outlet collection case, introduces water-cooling wall and exports mixing header by hanging the pipe outlet connecting pipe; Second branch comprises that the side water bag wall that is communicated with successively with horizontal flue outlet at bottom collection case is introduced tube connector, side water bag wall inlet collects case, side water bag wall, side water bag wall outlet collection case, introduces water-cooling wall outlet mixing header by side water bag wall outlet connecting pipe.
2. water wall of monotube boiler according to claim 1 is characterized in that, the middle transition mixing header is positioned at wall furnace arch, furnace nose water-cooling wall below, back, and all pipes of bottom spiral water-cooling wall are all more than burner hearth 1 circle.
3. water wall of monotube boiler according to claim 2 is characterized in that, back wall furnace arch, furnace nose water-cooling wall bottom is fixed on the back wall via suspension rod and hangs on the tube inlet collection case.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009100596998A CN101586802B (en) | 2009-06-23 | 2009-06-23 | Water wall of monotube boiler |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2009100596998A CN101586802B (en) | 2009-06-23 | 2009-06-23 | Water wall of monotube boiler |
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| CN101586802A CN101586802A (en) | 2009-11-25 |
| CN101586802B true CN101586802B (en) | 2011-05-11 |
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Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102010038885B4 (en) * | 2010-08-04 | 2017-01-19 | Siemens Aktiengesellschaft | Once-through steam generator |
| CN102589000B (en) * | 2012-03-07 | 2014-04-09 | 上海锅炉厂有限公司 | Boiler comprising water cooling system for variable-section hearth |
| CN104099135A (en) * | 2014-07-22 | 2014-10-15 | 中国华能集团清洁能源技术研究院有限公司 | High-temperature resistant burner shield for gasification furnace |
| CN104534442A (en) * | 2014-12-28 | 2015-04-22 | 哈尔滨锅炉厂有限责任公司 | Low mass flow speed ultra-supercritical boiler water circulation device and water circulation method |
| CN106016345B (en) * | 2016-05-20 | 2018-03-13 | 哈尔滨工业大学 | A kind of device for reducing water-cooling wall temperature deviation installed in supercritical W-shaped flame boiler |
| CN106765013B (en) * | 2016-11-29 | 2018-11-30 | 北京巴布科克·威尔科克斯有限公司 | Ultra-high parameter ultra-supercritical boiler three-stage burner hearth |
| 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 |
| CN108534118B (en) * | 2018-03-30 | 2023-10-31 | 东方电气集团东方锅炉股份有限公司 | Water-cooled wall structure of supercritical or ultra-supercritical once-through boiler |
| CN109764328B (en) * | 2018-12-12 | 2020-08-25 | 华中科技大学 | Application method of supercritical carbon dioxide boiler |
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