CN102798117A - Chain grate boiler with full-coverage front arch - Google Patents
Chain grate boiler with full-coverage front arch Download PDFInfo
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- CN102798117A CN102798117A CN2012103351462A CN201210335146A CN102798117A CN 102798117 A CN102798117 A CN 102798117A CN 2012103351462 A CN2012103351462 A CN 2012103351462A CN 201210335146 A CN201210335146 A CN 201210335146A CN 102798117 A CN102798117 A CN 102798117A
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- arch
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- chain grate
- boiler
- face arch
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Abstract
The invention relates to a chain grate boiler with a full-coverage front arch. The boiler comprises a chain grate, a coal hopper, a full-coverage front arch arranged in a hearth from front to back, a combinational secondary air spray pipe arranged on the side wall of the hearth at the lower part of the full-coverage front arch and a smoke guide arch for guiding the high-temperature smoke gas to the upper hearth. After entering the hearth along with the grate, raw coal is on fire rapidly under heat radiation of the full-coverage front arch, flame and high-temperature smoke gas generated during combustion of raw coal crosses over from front to back along the coal bed of the whole chain grate and flows out from an outlet at the rear part of the hearth so that the coal bed on the whole chain grate at the lower part of the full-coverage front arch is in a high-temperature state, and high combustion efficiency is realized. At the same time, air fed from a blower is sprayed over the coal bed at the lower part of the long front arch through the combinational secondary air spray pipe, so that the situation that the volatile matter of raw coal generates black smoke due to oxygen deficiency in the combustion process can be avoided.
Description
Technical field
The present invention relates to field of boilers, be specially chain grate boiler with all standing face arch.
Background technology
At present, chain grate boiler adopts short face arch, long rear arch, and face arch is higher than the combined type furnace arch structure of rear arch.For the raw coal inferior that some volatile matters are high, phosphorus content is low; When its volatile matter afterburnt; The burning of surplus carbon granules be not enough to guarantee that the burner hearth under the rear arch has higher temperature, also just can not realize carbon granules in lime-ash efficient burning constantly in the burner hearth under the rear arch, cause ash content carbon high; Can't guarantee the normal output of boiler, also greatly reduce the thermal efficiency of boiler simultaneously.Chain grate boiler is a kind of widely used boiler type of furnace; Its operation energy consumption is far below pulverized-coal fired boiler and fluidized-bed combustion boiler; Its reliability of operation is then far above reciprocating-grate boiler, therefore, uses the low raw coal inferior of volatile matter height, phosphorus content and applies with chain grate boiler if can realize; Will promote the chain grate boiler development of technology, energy savings and protection environment are had important practical significance.
Summary of the invention
Can not adapt to existing chain grate boiler and to use volatile matter height, raw coal inferior that phosphorus content is low, thereby cause that boiler combustion efficiency is low, boiler output descends and be prone to produce problem such as black smoke.The invention provides the chain grate boiler type of furnace with all standing face arch.Technical scheme of the present invention is: remove the forward and backward arch combining structure that the conventional chains fire grate is adopted, adopt rear arch is not set, only in burner hearth, be provided with by preceding to after all standing face arch, and the structure of combination secondary wind is set on the burner hearth side wall of its underpart.Raw coal is when getting into burner hearth with fire grate, and under the heat radiation of all standing face arch with higher temperature, the surface, coal seam of raw coal catches fire rapidly.Since the present invention in boiler furnace, be provided with by preceding to after all standing face arch; Under its guiding; The flame of raw coal combustion and high-temperature flue gas will along on the whole chain fire-gate coal seam by preceding to after skim over, flow out from all standing face arch exit that is positioned at the burner hearth rear portion, so just guaranteed to be positioned at whole chain fire-gate coal seam, all standing face arch bottom and all be in the condition of high temperature; Guarantee the after-flame of carbon granules in the lime-ash, can realize very high efficiency of combustion.Simultaneously, be provided with the combination secondary wind jet pipe that is connected with secondary air duct, be used for guaranteeing that the high-volatile of raw coal can not produce black smoke because of anoxic in combustion process in both sides, all standing face arch bottom.
Description of drawings
Fig. 1 is the cutaway view of front view of the present invention, and Fig. 2 is the cutaway view in the A-A cross section of Fig. 1.
Piece number explanation among the figure:
1, traveling-grate stoker; 2, coal bunker; 3, secondary wind jet pipe; 4, all standing face arch; 5, front smoke chamber; 6, upper furnace; 7, lead the cigarette arch; 8, left side convection bank flue; 9, right side convection bank flue; 10, air delivery duct; 11, burner hearth side wall; 12, boiler flue gas outlet, 13, slag notch.
The specific embodiment
Below in conjunction with accompanying drawing optimum implementation of the present invention is described in detail.Chain grate boiler with all standing face arch comprises traveling-grate stoker 1, coal bunker 2, the secondary air channel 3 that is connected with air delivery duct 10, all standing face arch 4, lead cigarette arch 7, and in the air delivery duct boiler body that 10 tops are provided with, that include left side convection bank flue 8 and right side convection bank flue 9.
During boiler operatiopn, the raw coal in coal bunker 2 drops on the traveling-grate stoker 1, and along with the bottom that enters into all standing face arch 4 by the traveling-grate stoker that moves behind the forward direction 1; Under the heat radiation of all standing face arch 4 with higher temperature; Coal seam surface can be rapid fire burns, the flame that is produced and high-temperature flue gas under the guiding of all standing face arch 4, on the whole chain fire-gate coal seam, edge by preceding to after skim over; Draw from all standing face arch 4 exits that are positioned at the burner hearth rear portion; So just guarantee to be positioned at whole chain fire-gate coal seam, all standing face arch 4 bottoms and all be in the condition of high temperature, guaranteed the after-flame of carbon granules in the lime-ash, realized very high efficiency of combustion.The high-temperature flue gas that flows out from all standing face arch 4 exits that are positioned at the burner hearth rear portion will be under the guiding of leading cigarette arch 7; Flow into upper furnace 6 from all standing face arch 4 and the gap location of leading between the cigarette arch 7; Flow through right side convection bank flue 9, front smoke chamber 5 and left side convection bank flue 8 then successively from the rear portion of upper furnace 6; Working medium in the boiler heats, and discharges boiler through boiler flue gas outlet 12 then.Simultaneously; On the burner hearth side wall 11 of all standing face arch 4 bottoms, respectively be provided with the combination secondary wind jet pipe 3 that is connected with air delivery duct 10; The air of being sent here through air delivery duct 10 by air blast sprays into the top, coal seam that is positioned at all standing face arch 4 bottoms through combination secondary wind jet pipe 3, is used for guaranteeing that the fugitive constituent of raw coal can not produce black smoke because of anoxic in combustion process.The lime-ash that produces behind the raw coal combustion is discharged boiler from slag notch 13.
Claims (3)
1. the chain grate boiler that has an all standing face arch comprises traveling-grate stoker (1), coal bunker (2), the secondary air channel (3) that is connected with air delivery duct (10), all standing face arch (4) and leads cigarette arch (7), and in the air delivery duct boiler body that (10) top is provided with, that include left side convection bank flue (8) and right side convection bank flue (9).
2. the chain grate boiler with all standing face arch according to claim 1; It is characterized in that the top of traveling-grate stoker (1) be provided with by preceding to after all standing face arch (4), and the burner hearth side wall 11 of all standing face arch (4) bottom is provided with the combination secondary wind jet pipe (3) that is connected with air delivery duct (10).
3. the chain grate boiler with all standing face arch according to claim 1; The upper back that it is characterized in that long face arch (4) is provided with leads cigarette arch (7); All standing face arch (4) and lead between the cigarette arch (7) and leave the gap is used to guarantee that flue gas flows to upper furnace (6) from the rear portion of long face arch (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103351462A CN102798117A (en) | 2012-09-12 | 2012-09-12 | Chain grate boiler with full-coverage front arch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012103351462A CN102798117A (en) | 2012-09-12 | 2012-09-12 | Chain grate boiler with full-coverage front arch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102798117A true CN102798117A (en) | 2012-11-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012103351462A Pending CN102798117A (en) | 2012-09-12 | 2012-09-12 | Chain grate boiler with full-coverage front arch |
Country Status (1)
| Country | Link |
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| CN (1) | CN102798117A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102954485A (en) * | 2011-08-18 | 2013-03-06 | 哈尔滨工大格瑞环保能源科技有限公司 | Long front arch and secondary air composite structure of lignite-fired traveling grate boiler |
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2012
- 2012-09-12 CN CN2012103351462A patent/CN102798117A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102954485A (en) * | 2011-08-18 | 2013-03-06 | 哈尔滨工大格瑞环保能源科技有限公司 | Long front arch and secondary air composite structure of lignite-fired traveling grate boiler |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20121128 |