CN103062748A - Vertical type coal dust corner tube boiler - Google Patents

Vertical type coal dust corner tube boiler Download PDF

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Publication number
CN103062748A
CN103062748A CN2012105705315A CN201210570531A CN103062748A CN 103062748 A CN103062748 A CN 103062748A CN 2012105705315 A CN2012105705315 A CN 2012105705315A CN 201210570531 A CN201210570531 A CN 201210570531A CN 103062748 A CN103062748 A CN 103062748A
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CN
China
Prior art keywords
boiler
coal dust
collecting box
burner
temperature air
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Pending
Application number
CN2012105705315A
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Chinese (zh)
Inventor
苏晓奇
王改
唐海青
沈玉华
周海能
吴星
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
HANGZHOU JUNENG BOILER CO Ltd
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HANGZHOU JUNENG BOILER CO Ltd
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Priority to CN2012105705315A priority Critical patent/CN103062748A/en
Publication of CN103062748A publication Critical patent/CN103062748A/en
Pending legal-status Critical Current

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Abstract

The invention discloses a vertical type coal dust corner tube boiler which comprises a burner, a boiler furnace, a high temperature air preheater, a coal economizer, a low temperature air preheater convection tube bundle, an upper collecting box, a top collecting box, a boiler barrel and a lower collecting box. The lower collecting box is arranged at the bottom of a boiler body, and the upper collecting box and the top collecting box are arranged at the top of the boiler body and are communicated through a vapor communicating pipe. The vertical type coal dust corner tube boiler is characterized in that the burner is arranged at the top of the boiler body, the boiler body is of a vertical type tubular membrane type water-cooled wall structure, four down pipes are arranged at four corners, and the down pipes and two ends of the membrane type water-cooled wall are communicated with the upper collecting box and the lower collecting box respectively. The convection tube bundle is arranged on the outer side of the membrane type water-cooled wall, the bottom of the convection tube bundle is communicated with a hearth smoke outlet, and the top of the convection tube bundle is communicated with the high temperature air preheater. The vertical type coal dust corner tube boiler has the advantages that an integral structure is compact, the appearance is arranged simply, an occupied area is small, steel consumption is small, water circulating differential pressure of the boiler is large, and water circulation is safe and reliable, and the like.

Description

A kind of vertical coal dust corner tube boiler
Technical field
The invention belongs to the coal-burned industrial boiler field, be specifically related to a kind of take coal dust or municipal sludge, living beings as fuel, for generation of the vertical coal dust corner tube boiler of steam.
Background technology
The energy resource structure of China is take coal as main, and within the following long duration, coal-burned industrial boiler will be the leading products of Industrial Boiler.
Traditional industry coal-boiler is take grate firing boiler as main, and shortcoming is that efficiency of combustion is low, and is seriously polluted, is difficult to satisfy energy-saving and emission-reduction and pollutant emission requirement.
Coal dust firing is one of high performance clean burning mode of coal, and its efficiency of combustion can reach more than 96%, is the combustion technology of a maturation, is widely used at large-sized station boiler.In recent years, coal dust firing also is applied on Industrial Boiler, all adopts the two drum water pipe structures of horizontal internal combustion pan shell type structure D type or bottom to arrange the vertical coal-powder boiler of burner.But there is certain deficiency:
1) burning is even not, and the front and back Temperature Difference Ratio is larger, is unfavorable for reducing NO XContent.
2) load regulation range is little, can only use single-fuel-coal dust.
3) Boiler Ash, slag cleaning inconvenience.
4) the boiler room floor space is large.
5) the easy coking of burner hearth bottom.
6) burner maintenance difficulty.
Summary of the invention
The present invention is directed to the deficiency of existing horizontal pulverized-coal fired boiler, a kind of novel vertical coal dust corner tube boiler is provided.
The present invention is achieved by the following technical solutions: a kind of vertical coal dust corner tube boiler, comprise burner, boiler body, high-temperature air preheater, economizer, low-temperature air preheater, convection bank, upper collecting chamber, top header, drum and lower header, described lower header is arranged on the bottom of boiler body, described upper collecting chamber and top header are arranged on the top of boiler body, and by vapour communicating pipe UNICOM; It is characterized in that described burner is arranged on the top of boiler body; Described boiler body adopts vertical film water cold wall structure, arranges 4 down-comers for four jiaos, in the two ends of described down-comer and fin panel casing respectively with described upper collecting chamber and lower header UNICOM; Described convection bank is arranged on the outside of fin panel casing, its bottom and burner hearth outlet flue UNICOM, top and described high-temperature air preheater UNICOM; The air space UNICOM of described top header and described drum; The hydrospace UNICOM of described upper collecting chamber and described drum.
Vertical coal dust corner tube boiler of the present invention, coal dust or municipal sludge borrow a wind to spray into vertical furnace chamber by top burner, simultaneously, the high temperature air after the heating of low-temperature air preheater and high-temperature air preheater also enters burner and powder fuel and is mixed into burner hearth and carries out fierce suspension combustion; And in burner hearth, arranged the two-stage tertiary air, guaranteed that burner hearth has sufficient oxygen and fuel reaction burning.180 ° of high-temperature flue gas after hearth combustion heat exchange turnovers upwards enter convection bank and carry out heat convection, and flue gas enters flue gas purification system after entering successively high-temperature air preheater, economizer and empty low temperature air preheater again.
This project has the following advantages:
1) boiler body adopts vertical corner tube type structural configuration, arranges 4 heavy caliber down-comers for four jiaos, and this down-comer is water circulation pipe, also support simultaneously whole boiler, therefore do not need to establish in addition supporting steel frame, compact overall structure, profile are arranged simply, floor space is little, and the steel consumption is low.
2) burner hearth adopts membrane wall structure, and furnace wall only needs insulation material, and integral sealing, good heat insulating are leaked out few.
3) boiler water cycle pressure reduction is large, and safe water circulation is reliable.
4) upper collecting chamber is connected with vapour communicating pipe with the top header and accesses simultaneously drum, and steam water interface enters upper collecting chamber from heating surface, and in upper collecting chamber the carbonated drink pre-separation occurs, and steam enters the air space on drum top to the top header through vapour communicating pipe.Because all in the access of the high water level place of drum, then steam does not directly access drum to upper collecting chamber by the hydrospace, thereby has avoided the generation of foam, adds the steam that enters drum and has carried out pre-separation, therefore, has greatly improved the quality of steam.
5) another particularly important characteristics of the present invention are top layout burners, and this structure is so that the present invention also has following useful technique effect:
5.1) can reduce the boiler foundation height, shorten the capital construction time, reduce capital cost.
5.2) flame profile and size of burner hearth be complementary, flame does not paste wall and touches wall; Prevent the flame impingement fin panel casing, prolonged boiler service life.
5.3) powder fuel burning do not have high temperature heat source again to heat after remaining lime-ash heat is absorbed cooling by the membrane type water-cooling wall after finishing; Therefore, the ash temperature of falling into ash dropping hopper is lower, effectively prevents the burner hearth bottom coking.
5.4) furnace flame flow direction is consistent with the powder fuel gravity direction, red-hot lime-ash can't be fallen into burner region by gravity, the coking phenomenon of effectively having avoided burner to cause owing to red-hot lime-ash, the service life of greatly improving burner.
5.5) burner hearth bottom is convenient to lime-ash and arranges automatic dreg discharger, the labor personnel's of reduction department labour intensity, the raising efficient of slagging tap.
As a further improvement on the present invention, described burner is two.The benefit that double burner is arranged is that each burner can control separately, greatly improves the stability of burning and the adjusting function of load, can use two or more fuel simultaneously.
Further improve as of the present invention, the flag facial canal is adopted in described convection bank again.Convection heating surface adopts the flag facial canal, and the flag facial canal press the vertical in-line arrangement of certain angle, and heating surface is sufficient, circulation reliably, sweep of gases is smooth and easy, is difficult for dust stratification, prolonged boiler service life.
Further improve as of the present invention, adopt grading combustion technology, send into successively the two-stage tertiary air in the burner hearth, whole uniform temperature fields can effectively stop the generation of burner hearth coking and reduction nitrogen oxide.
Description of drawings
Fig. 1 is the structure chart of the vertical coal dust corner tube boiler of the present invention.
Fig. 2 is that the A-A of Fig. 1 is to cutaway view.
Among the figure, 1-low-temperature air preheater, 2-economizer, 3-convection bank, the 4-high-temperature air preheater, 5-upper collecting chamber, 6-vapour communicating pipe, 7-top header, 8-drum, 9-explosion proof door, 10-one-level tertiary air, 11-secondary tertiary air, 12-down-comer, the 13-burner hearth, 14-lower header, 15-cleaning door, the 16-inspection door, 17-burner, 18-burner hearth outlet flue.
The specific embodiment
With reference to Fig. 1, a kind of vertical coal dust corner tube boiler, comprise two burners 17, boiler furnace 13, high-temperature air preheater 4, economizer 2, low-temperature air preheater 1, convection bank 3, upper collecting chamber 5, top header 7, drum 8 and lower header 14, described lower header 14 is arranged on the bottom of boiler body, described upper collecting chamber 5 and top header 7 are arranged on the top of boiler body, and by vapour communicating pipes 6 UNICOM; Described burner 17 is arranged on the top of boiler body; Described boiler body adopts vertical corner tube type structure fin panel casing, arranges 4 down-comers 12 for four jiaos, in the two ends of described down-comer 12 and fin panel casing respectively with described upper collecting chamber 5 and lower header 14 UNICOMs; The flag facial canal is adopted in described convection bank 3, and vertical in-line arrangement is in the outside of fin panel casing, the bottom of convection bank 3 and burner hearth outlet flue 18 UNICOMs, top and described high-temperature air preheater 4 UNICOMs, the gas approach end of economizer 2 and high-temperature air preheater 4 other end UNICOMs, the port of export is connected to low-temperature air preheater 1; The air space UNICOM of described top header 7 and described drum 8; The hydrospace UNICOM of described upper collecting chamber 5 and described drum 8.
Two burner 17 burnings can independently be controlled, and burner hearth 13 bottoms are provided with explosion proof door 9 and cleaning door 15, and medium position is furnished with the two-stage tertiary air.
Operation principle of the present invention is as follows:
Coal dust or municipal sludge borrow a wind to spray into vertical furnace chamber 13 by two burners 17 in top, simultaneously, the high temperature air after 4 heating of low-temperature air preheater 1 and high-temperature air preheater also enters burner 17 and is mixed into burner hearth 13 with powder fuel and carries out fierce suspension combustion; And in burner hearth, arranged the two-stage tertiary air, guaranteed that burner hearth has sufficient oxygen and fuel reaction burning.Upwards enter flag facial canal 3 180 ° of burner hearth outlet flue 18 turnovers of the high-temperature flue gas after the hearth combustion heat exchange below the burner hearth 13 and carry out heat convection, flue gas enters flue gas purification system after entering successively high-temperature air preheater 4, economizer 2 and low-temperature air preheater 1 again.In flue gas purification system, the solid particle in the flue gas is eliminated, and clean preheated air sprays into vertical furnace chamber 13 again from two burners 17.High-temperature air preheater 4 and low-temperature air preheater 1 can utilize the waste heat of flue gas that air is carried out preheating, thereby reach recycling and energy-conservation purpose.
The fin panel casing of upper collecting chamber 5, top header 7, vapour communicating pipe 6, lower header 14, burner hearth and 4 down-comers 12 consist of the water circulation system of sealing.Upper collecting chamber 5 is connected with 7 usefulness vapour communicating pipes 6 of top header and accesses simultaneously drum 8, steam water interface enters upper collecting chamber 5 from the heating surface rising of fin panel casing, and in the pre-separation of 5 li generations of upper collecting chamber carbonated drink, steam enters the air space on drum 8 tops to top header 7 through vapour communicating pipe 6.Because all in the access of the high water level place of drum 8, then steam does not directly access drum to upper collecting chamber 5 by the hydrospace, thereby has avoided the generation of foam, adds the steam that enters drum 8 and has carried out pre-separation, therefore, has greatly improved the quality of steam.Water after 5 li carbonated drink pre-separations of upper collecting chamber flows into lower header 14 from 4 down-comers 12, enters in the fin panel casing again, forms water circulation.
What should be understood that is: above-described embodiment is just to explanation of the present invention, rather than limitation of the present invention, and any innovation and creation that do not exceed in the connotation scope of the present invention all fall within protection scope of the present invention.

Claims (4)

1. vertical coal dust corner tube boiler, comprise burner (17), boiler furnace (13), high-temperature air preheater (4), economizer (2), low-temperature air preheater (1), convection bank (3), upper collecting chamber (5), top header (7), drum (8) and lower header (14), described lower header (14) is arranged on the bottom of boiler body, described upper collecting chamber (5) and top header (7) are arranged on the top of boiler body, and by vapour communicating pipe (6) UNICOM; It is characterized in that described burner (17) is arranged on the top of boiler body; Described boiler body adopts vertical film water cold wall structure, arranges 4 down-comers (12) for four jiaos, in the two ends of described down-comer (12) and fin panel casing respectively with described upper collecting chamber (5) and lower header (14) UNICOM; Described convection bank (3) is arranged on the outside of fin panel casing, its bottom and burner hearth outlet flue (18) UNICOM, top and described high-temperature air preheater (4) UNICOM; The air space UNICOM of described top header (7) and described drum (8); The hydrospace UNICOM of described upper collecting chamber (5) and described drum (8).
2. a kind of vertical coal dust corner tube boiler as claimed in claim 1 is characterized in that described burner (17) is two.
3. a kind of vertical coal dust corner tube boiler as claimed in claim 1 is characterized in that described two burners (17) all are arranged on the boiler body top.
4. such as any one described a kind of vertical coal dust corner tube boiler of claim 1-3, it is characterized in that described convection bank (3) employing flag facial canal, and in-line arrangement.
CN2012105705315A 2012-12-24 2012-12-24 Vertical type coal dust corner tube boiler Pending CN103062748A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108591997A (en) * 2018-05-31 2018-09-28 上海工业锅炉研究所有限公司 A kind of DHS corner tube types fuel-firing gas-firing steam boiler

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101514811A (en) * 2009-03-17 2009-08-26 西安交通大学 Inclined porch-free corner-tube full film-type wall-circulating fluidized bed boiler
CN202032544U (en) * 2011-04-11 2011-11-09 中国华能集团清洁能源技术研究院有限公司 Invert pulverized-coal fired boiler arrangement structure for ultrahigh steam temperature steam parameter
CN102644911A (en) * 2012-05-08 2012-08-22 杭州燃油锅炉厂 Vertical coal dust corner tube boiler
CN203203008U (en) * 2012-12-24 2013-09-18 杭州燃油锅炉有限公司 Upright pulverized coal corner tube type boiler

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101514811A (en) * 2009-03-17 2009-08-26 西安交通大学 Inclined porch-free corner-tube full film-type wall-circulating fluidized bed boiler
CN202032544U (en) * 2011-04-11 2011-11-09 中国华能集团清洁能源技术研究院有限公司 Invert pulverized-coal fired boiler arrangement structure for ultrahigh steam temperature steam parameter
CN102644911A (en) * 2012-05-08 2012-08-22 杭州燃油锅炉厂 Vertical coal dust corner tube boiler
CN203203008U (en) * 2012-12-24 2013-09-18 杭州燃油锅炉有限公司 Upright pulverized coal corner tube type boiler

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108591997A (en) * 2018-05-31 2018-09-28 上海工业锅炉研究所有限公司 A kind of DHS corner tube types fuel-firing gas-firing steam boiler

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Application publication date: 20130424