CN204084433U - Two drum longitudinal chain grate boiler - Google Patents
Two drum longitudinal chain grate boiler Download PDFInfo
- Publication number
- CN204084433U CN204084433U CN201420583016.5U CN201420583016U CN204084433U CN 204084433 U CN204084433 U CN 204084433U CN 201420583016 U CN201420583016 U CN 201420583016U CN 204084433 U CN204084433 U CN 204084433U
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- Prior art keywords
- grate
- arch
- burner hearth
- boiler
- convection bank
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- Solid-Fuel Combustion (AREA)
Abstract
The utility model relates to chain grate boiler, specifically a kind of two drum longitudinal chain grate boilers of the various biological particles that is applicable to burn.Comprise: an air compartment of the grate be made up of the traveling-grate stoker of bottom of furnace body and grate bottom, the face arch above traveling-grate stoker and rear arch, the combustion chamber below face arch and rear arch, upper drum longitudinal in the burner hearth on top, combustion chamber and lower drum; The burner hearth aditus laryngis place that described face arch and rear arch are formed is respectively arranged with secondary air channel; The burner hearth of described boiler is bare-tube wall structure, described burner hearth rear portion set gradually backward along flow of flue gas direction be made up of steel pipe Crust blocks pipe bundle, one-level convection bank and secondary convection bank.The utility model can make biomass fuel burn completely, heating surface noncoking, not dust stratification, ensures boiler safety, stable, Effec-tive Function.
Description
Technical field
The utility model relates to chain grate boiler, and specifically a kind of two drum longitudinal chain grate boilers of the various biological particles that is applicable to burn, belong to thermal powerplant.
Background technology
At present, chain grate boiler is generally poor to biomass undergoes adaptation.Because living beings fusion point of ash is general lower, boiler heating surface has very strong fouling potential, easily occurs coking and fouling phenomenon.When boiler heating surface coking, dust stratification are serious, exhaust gas temperature can be very high, and boiler efficiency reduces, and has a strong impact on boiler output and safe and stable operation.
Utility model content
The utility model is intended to solve existing chain grate boiler and burns the problems referred to above that various living beings exist, and provides a kind of two drum longitudinal chain grate boilers being applicable to biomass burning particle.
The utility model solve the problem adopt technical scheme be:
A kind of two drum longitudinal chain grate boiler, comprise: an air compartment of the grate be made up of the traveling-grate stoker of bottom of furnace body and grate bottom, face arch above traveling-grate stoker and rear arch, the combustion chamber below face arch and rear arch, upper drum longitudinal in the burner hearth on top, combustion chamber and lower drum; The burner hearth aditus laryngis place that described face arch and rear arch are formed is respectively arranged with secondary air channel; The burner hearth of described boiler is bare-tube wall structure, described burner hearth rear portion set gradually backward along flow of flue gas direction be made up of steel pipe Crust blocks pipe bundle, one-level convection bank and secondary convection bank.
Adopt the utility model of technique scheme, compared with prior art, its beneficial effect is:
Owing to being provided with overfire air device respectively at burner hearth aditus laryngis place, therefore, can, by the ratio of adjustment primary and secondary air, biomass fuel be burnt completely; Adjust the biomass fuel that the height of forward and backward arch and overlay length can adapt to variety classes and calorific value; Burner hearth is bare-tube wall structure, makes tall and big in burner hearth, spacious, and in stove, water-cooling wall is subject to the sweep of gases containing high concentrated, solid particle, can not dust stratification; Burner hearth back-end surfaces is low due to flue-gas temperature, can control dust stratification further by the tube pitch suitably strengthening two-stage convection bank.
As preferably, the utility model further technical scheme is:
Described traveling-grate stoker forms bilateral afterbody air inlet structure form by the First air import that its rear end is arranged.
The bellows of described face arch place secondary air channel to be arranged in before burner hearth outside water-cooling wall, the bellows of rear arch place secondary air channel are arranged in above rear arch, the secondary air channel at described face arch place and the secondary air channel at rear arch place are all arranged in arrangement shape, make hot blast along furnace chamber width uniform distribution.
Described Crust blocks pipe bundle, one-level convection bank and secondary convection bank are furnished with soot blower respectively.Soot blower can regularly purge, therefore, it is possible to guarantee that heating surface keeps efficient heat transfer.
Described Crust blocks pipe bundle, one-level convection bank and secondary convection bank bottom are respectively arranged with and ash are directly fallen within grate surface and except the ash tube in pit.
Accompanying drawing explanation
Fig. 1 is the utility model example structure schematic diagram;
In figure: feed hopper 1, face arch 2, front arch secondary airduct 3, upper drum 4, bare-tube wall 5, Crust blocks pipe bundle 6, one-level convection bank 7, secondary convection bank 8, lower drum 9, economizer 10, soot blower 11, First air import 12, ash tube 13, rear arch 14, rear arch secondary air channel 15, an air compartment 16, combustion chamber 17, traveling-grate stoker 18.
Detailed description of the invention
Below in conjunction with embodiment, the utility model is described in further detail, and object is only to understand the utility model content better.
See Fig. 1, the two drum longitudinal chain grate boilers described in embodiment, combustion zone, its underpart is made up of feed hopper 1, face arch 2, front arch secondary airduct 3, rear arch 14, rear arch secondary air channel 15 and traveling-grate stoker 18; Heating surface region, top is made up of bare-tube wall 5, Crust blocks pipe bundle 6 and one-level convection bank 7, secondary convection bank 8; Afterbody arranges independently economizer 10, and economizer 10 forms afterbody heating surface.
Boiler entirety belongs to supporting type structure.Lower combustion district and heating surface district, top all adopt heavy boiler setting, external metal casing; The economizer 10 of afterbody adopts light thermal-insulating material to add guard plate type; Combustion chamber 17 inwall of lower furnace portion is coated with the fire-resistant and heat-insulation layer be made up of refractory material.
The traveling-grate stoker 18 of bottom of furnace body forms grate, and grate bottom arranges several air compartment 16, and First air import 12 is arranged on traveling-grate stoker 18 rear end and forms bilateral afterbody air inlet structure form, and First air is blown to combustion chamber 17 by fire grate gap.
Face arch 2 and rear arch 14 is provided with above traveling-grate stoker 18, combustion chamber 17 below face arch 2 and rear arch 14, face arch 2 and rear arch 14 form burner hearth aditus laryngis, burner hearth aditus laryngis place is respectively arranged with secondary air channel, the bellows of front arch secondary airduct 3 to be arranged in before burner hearth outside water-cooling wall, the bellows of rear arch secondary air channel 15 are arranged in above rear arch 14, and front arch secondary airduct 3 and rear arch secondary air channel 15 are all arranged in arrangement shape, make hot blast along furnace chamber width uniform distribution.
Longitudinal in the burner hearth on top, combustion chamber 17 have upper drum 4 and lower drum 9, and burner hearth surrounding is bare-tube wall 5 structure, burner hearth rear portion set gradually backward along flow of flue gas direction be made up of steel pipe Crust blocks pipe bundle 6, one-level convection bank 7 and secondary convection bank 8.
Crust blocks pipe bundle 6, one-level convection bank 7 and secondary convection bank 8 are furnished with soot blower 11 respectively, and soot blower 11 can regularly purge, therefore, it is possible to guarantee that heating surface keeps efficient heat transfer.
Crust blocks pipe bundle 6, one-level convection bank 7 and secondary convection bank 8 bottom are also respectively arranged with ash tube 13, ash directly can be fallen within grate surface and remove in pit by ash tube 13.
The course of work of the present utility model is summarized as follows:
Boiler adopts the Bed Ignites of traveling-grate stoker 18, fractional combustion, and primary air ratio is that 45-55%(is according to components of biomass change adjustment).During normal operation, First air pressurizes through primary air fan, and enter First air import 12 after boiler grate by an air channel, the air channel along traveling-grate stoker 18 both sides enters an air compartment 16 under fire grate, and then enter combustion chamber 17 through fire grate gap and the bed of material, the air needed for grate firing is provided.The classification of air is sent into, and causes again cold and oxygen deficient burning situation, reduces the growing amount of NOX and effectively prevents fire grate coking phenomenon.In this region, in burning, most of heat is released, the carbon granules that unburnt particle diameter is less and part volatile matter enter tall and big upper furnace by the burner hearth aditus laryngis that face arch 2 and rear arch 14 are formed and burn away, front arch secondary airduct 3 and rear arch secondary air channel 15 adopt the import of heavy caliber side direction and be staggered front to back in the width direction arranges tubule outlet, to increase the rigidity of Secondary Air, strengthen penetration power, the change that the layout of Secondary Air had both met along fire box 17 cross section reaches certain cigarette speed requirement; Meet again the requirement that Secondary Air has certain penetration power, cause oxidation environment at this section, supplementary volatile matter burns required air further, and the volatile matter entering this section is fully burnt.Secondly ensure highly there is rational cigarette speed along fire box 17, to ensure the stable of flue gas dust burdening, guarantee the heat absorption of upper furnace heating surface.Coordinate furnace heat transfer to control fire box's homogeneous temperature simultaneously.So the introducing height of Secondary Air and speed guarantee that Secondary Air reaches the key of above-mentioned effect.
In addition, high-temperature flue gas after Crust blocks pipe bundle 6 cigarette temperature drop to about 800 DEG C, then one-level convection bank 7 and secondary convection bank 8 heat release is entered successively, discharge upper boiler heating surface district afterwards, now cigarette temperature drop is to about 240 DEG C, enter afterbody economizer 10 heating surface through connecting flue, through afterbody heat exchange, cigarette temperature drop is discharged out of the furnace by exhanst gas outlet after about 140-160 DEG C.
Claims (5)
1. a two drum longitudinal chain grate boiler, comprise: an air compartment of the grate be made up of the traveling-grate stoker of bottom of furnace body and grate bottom, face arch above traveling-grate stoker and rear arch, combustion chamber below face arch and rear arch, upper drum longitudinal in the burner hearth on top, combustion chamber and lower drum, it is characterized in that, the burner hearth aditus laryngis place that described face arch and rear arch are formed is respectively arranged with secondary air channel; The burner hearth of described boiler is bare-tube wall structure, described burner hearth rear portion set gradually backward along flow of flue gas direction be made up of steel pipe Crust blocks pipe bundle, one-level convection bank and secondary convection bank.
2. according to claim 1 pair of drum longitudinal chain grate boiler, is characterized in that, described traveling-grate stoker forms bilateral afterbody air inlet structure form by the First air import that its rear end is arranged.
3. according to claim 1 pair of drum longitudinal chain grate boiler, it is characterized in that, the bellows of described face arch place secondary air channel to be arranged in before burner hearth outside water-cooling wall, the bellows of rear arch place secondary air channel are arranged in above rear arch, the secondary air channel at described face arch place and the secondary air channel at rear arch place are all arranged in arrangement shape, make hot blast along furnace chamber width uniform distribution.
4. according to claim 1 pair of drum longitudinal chain grate boiler, is characterized in that, described Crust blocks pipe bundle, one-level convection bank and secondary convection bank are furnished with soot blower respectively.
5. according to claim 1 pair of drum longitudinal chain grate boiler, is characterized in that, described Crust blocks pipe bundle, one-level convection bank and secondary convection bank bottom are respectively arranged with and ash are directly fallen within grate surface and except the ash tube in pit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420583016.5U CN204084433U (en) | 2014-10-10 | 2014-10-10 | Two drum longitudinal chain grate boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420583016.5U CN204084433U (en) | 2014-10-10 | 2014-10-10 | Two drum longitudinal chain grate boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204084433U true CN204084433U (en) | 2015-01-07 |
Family
ID=52177144
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420583016.5U Expired - Fee Related CN204084433U (en) | 2014-10-10 | 2014-10-10 | Two drum longitudinal chain grate boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204084433U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110017463A (en) * | 2019-04-16 | 2019-07-16 | 武汉市新荣锅炉制造有限公司 | A kind of closed isobaric air compartment water pipe steam boiler |
| CN112212350A (en) * | 2020-09-21 | 2021-01-12 | 东方电气集团东方锅炉股份有限公司 | Horizontal flue deashing system suitable for pi type boiler |
-
2014
- 2014-10-10 CN CN201420583016.5U patent/CN204084433U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110017463A (en) * | 2019-04-16 | 2019-07-16 | 武汉市新荣锅炉制造有限公司 | A kind of closed isobaric air compartment water pipe steam boiler |
| CN110017463B (en) * | 2019-04-16 | 2020-09-01 | 武汉市新荣锅炉制造有限公司 | Water pipe steam boiler with closed isobaric air chamber |
| CN112212350A (en) * | 2020-09-21 | 2021-01-12 | 东方电气集团东方锅炉股份有限公司 | Horizontal flue deashing system suitable for pi type boiler |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150107 Termination date: 20201010 |