CN203203008U - Upright pulverized coal corner tube type boiler - Google Patents
Upright pulverized coal corner tube type boiler Download PDFInfo
- Publication number
- CN203203008U CN203203008U CN 201220724995 CN201220724995U CN203203008U CN 203203008 U CN203203008 U CN 203203008U CN 201220724995 CN201220724995 CN 201220724995 CN 201220724995 U CN201220724995 U CN 201220724995U CN 203203008 U CN203203008 U CN 203203008U
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- boiler
- corner tube
- collection tank
- boiler body
- temperature air
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Abstract
The utility model discloses an upright pulverized coal corner tube type boiler. The upright pulverized coal corner tube type boiler comprises combustors, a boiler combustion chamber, a high temperature air preheater, a coal economizer, a low temperature air preheater, a convection bank, an upper collection tank, a top collection tank, a boiler barrel and a lower collection tank; the lower collection tank is arranged at the bottom of a boiler body; and the upper collection tank and the top collection tank which are arranged at the top of the boiler body are communicated with each other through steam communicating pipes. The upright pulverized coal corner tube type boiler is characterized in that the combustors are arranged at the top of the boiler body; the boiler body is in an upright corner membrane wall type structure; four down pipes are arranged at four corners of the boiler body; two ends of the four down pipes and an membrane wall are respectively communicated with the upper collection tank and the lower collection tank; the convection bank is arranged on the external side of the membrane wall; the top of the convection bank is communicated with a smoke outlet of the combustion chamber; and the bottom of the convection bank is communicated with the high temperature air preheater. The upright pulverized coal corner tube type boiler has the advantages of being compact in whole structure, simple in shape arrangement, small in occupying area, low in steel consumption, large in water circulation pressure difference and safe and reliable in water circulation and the like.
Description
Technical field
The utility model belongs to the coal-burned industrial boiler field, is 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 utility model provides a kind of novel vertical coal dust corner tube boiler for the deficiency of existing horizontal pulverized-coal fired boiler.
The utility model is achieved through 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 utility model, 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 utility model are top layout burners, and this structure is so that the utility model 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 further improvement of the utility model, 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 utility model, 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 utility model, 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 utility model.
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 utility model 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 utility model, rather than to restriction of the present utility model, any utility model that does not exceed in the utility model connotation scope is created, and all falls within the protection domain of the present utility model.
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 2 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220724995 CN203203008U (en) | 2012-12-24 | 2012-12-24 | Upright pulverized coal corner tube type boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220724995 CN203203008U (en) | 2012-12-24 | 2012-12-24 | Upright pulverized coal corner tube type boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203203008U true CN203203008U (en) | 2013-09-18 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220724995 Expired - Lifetime CN203203008U (en) | 2012-12-24 | 2012-12-24 | Upright pulverized coal corner tube type boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203203008U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103062748A (en) * | 2012-12-24 | 2013-04-24 | 杭州燃油锅炉有限公司 | Vertical type coal dust corner tube boiler |
-
2012
- 2012-12-24 CN CN 201220724995 patent/CN203203008U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103062748A (en) * | 2012-12-24 | 2013-04-24 | 杭州燃油锅炉有限公司 | Vertical type coal dust corner tube boiler |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: Hangzhou City, Zhejiang province 311115 Fengdu Pingyao Town, Yuhang District Industrial Zone Road, Yangcheng Road No. 1-9 Patentee after: HANGZHOU JUNENG ENVIRONMENTAL PROTECTION TECHNOLOGY CO.,LTD. Address before: Hangzhou City, Zhejiang province 311115 Fengdu Pingyao Town, Yuhang District Industrial Zone Road, Yangcheng Road No. 1-9 Patentee before: HANGZHOU JUNENG BOILER Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130918 |
|
| CX01 | Expiry of patent term |