CN105570860A - Special biomass particle fluidized bed boiler with bed temperature regulating system - Google Patents
Special biomass particle fluidized bed boiler with bed temperature regulating system Download PDFInfo
- Publication number
- CN105570860A CN105570860A CN201510966738.8A CN201510966738A CN105570860A CN 105570860 A CN105570860 A CN 105570860A CN 201510966738 A CN201510966738 A CN 201510966738A CN 105570860 A CN105570860 A CN 105570860A
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- Prior art keywords
- boiler
- heat exchanger
- burner hearth
- convection bank
- drum
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B31/00—Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements of dispositions of combustion apparatus
- F22B31/08—Installation of heat-exchange apparatus or of means in boilers for heating air supplied for combustion
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B31/00—Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements of dispositions of combustion apparatus
- F22B31/0007—Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements of dispositions of combustion apparatus with combustion in a fluidized bed
- F22B31/0015—Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements of dispositions of combustion apparatus with combustion in a fluidized bed for boilers of the water tube type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B31/00—Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements of dispositions of combustion apparatus
- F22B31/0007—Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements of dispositions of combustion apparatus with combustion in a fluidized bed
- F22B31/0076—Controlling processes for fluidized bed boilers not related to a particular type
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Fluidized-Bed Combustion And Resonant Combustion (AREA)
Abstract
The invention relates to a special biomass particle fluidized bed boiler with a bed temperature regulating system. The special biomass particle fluidized bed boiler is characterized in that a hearth adopts a membrane water-cooled wall; the lower part of the hearth is arranged in a shape like an inverted cone; a heat exchanger and an inclined air distribution plate are arranged in the lower part of the hearth; an ignition device is arranged at one side of a water-cooled air chamber; the inclined air distribution plate is arranged above the water-cooled air chamber; an empty flue is arranged between the hearth and a convection pipe bundle; a water-cooled coated wall structure is adopted; the convection pipe bundle is arranged between an upper boiler barrel and a lower boiler barrel; the upper end of the convection pipe bundle is welded together with the upper boiler barrel, and the lower end of the convection pipe bundle is welded together with the lower boiler barrel; the convection pipe bundle has three flue gas passes; flue gases consequently scour pipes; a coal economizer, a secondary air preheater and a primary air preheater are sequentially arranged in a tail flue; and a hearth dense-phase region of the boiler is provided with the heat exchanger. The special biomass particle fluidized bed boiler has the beneficial effects that the fuel adaptability of the boiler is improved, the economic benefit of a power plant is increased, the safety of a circulating fluidized bed biomass boiler is improved, and the discharge of CO is effectively reduced.
Description
Technical field
The present invention relates to field of boilers, specifically the grain fluidized bed boiler of a kind of dedicated biomass with bed temperature regulating system.
Background technology
Biomass fuel is a kind of clean reproducible energy, but some shortcomings of ordinary student biomass fuel as: calorific value is low, volume is larger, be not easy to transport and store, limit the extensive utilization of biomass fuel, in order to address these problems, market adopt certain technological process biomass fuel is made biomass granule fuel, this granular fuel has won extensive volume accreditation with its distinctive advantage, it is compressed into graininess for living beings through related process, be convenient to store and transport, there is low moisture, higher thermal value, the features such as volume is light, after a boiler design completes, its heating surface area and arrangement are just constant, general boiler by burning and can only design the close fuel of fuel, although, fluidized beds combustion adaptability is wider than grate furnace, but because state's biomass resource is very abundant, current domestic granular fuel is mainly with maize straw, the agricultural wastes such as rice straw and branch, the forestry waste such as wood chip are Raw material processing, some variety classes biomass ash fusion point, the fuel characteristic differences such as calorific value are larger, as run on same boiler, easily cause the security incidents such as burner hearth coking.
Summary of the invention
Technical problem to be solved by this invention overcomes the deficiencies in the prior art, and provide the grain fluidized bed boiler of dedicated biomass of band bed temperature regulating system, the technical solution adopted for the present invention to solve the technical problems is: structure of the present invention comprises igniter, inclined distributor, heat exchanger, feed pipe, secondary air channel, burner hearth, empty flue, convection bank, upper drum, lower drum, economizer, air preheater of secondary air, First air air preheater, water cooled wind chamber, burner hearth emulsion zone, recycle valve, drum, economizer, the feed water system of boiler, back-end ductwork, electric control valve, check-valves, stop valve, electric check valve, it is characterized in that hanging a rear structure before boiler body adopts, boiler is double-barrel transverse formula structure, by burner hearth, empty flue, convection bank and back-end ductwork composition, burner hearth adopts fin panel casing, and lower furnace portion is that back taper is arranged, lower furnace portion is built-in with heat exchanger and inclined distributor, and igniter is arranged on the side of water cooled wind chamber, and the top of water cooled wind chamber is provided with inclined distributor,
Empty flue is arranged between burner hearth and convection bank, adopts water-cooled bag wall construction;
Convection bank is arranged between upper drum and lower drum, and convection bank upper end is welded mutually with upper drum, and convection bank lower end is welded mutually with lower drum, and the backhaul of convection bank flue gas is three backhauls, and flue gas and pipe are in forward washing away; Economizer, air preheater of secondary air, First air air preheater is arranged successively in back-end ductwork;
The burner hearth emulsion zone of boiler is provided with heat exchanger, and this heat exchanger is built-in heat exchanger.
Using method: heat exchanger feedwater comes from boiler water inlet pipe, from entering in heat exchanger by electric control valve and check-valves, water outlet directly enters drum, upper drum and lower drum form drum, between drum and heat exchanger, recycle valve is provided with in order to protect heat exchanger, recycle valve is by stop valve, electric check valve forms, the ratio of the radiant heat absorption of burner hearth emulsion zone is adjusted by the caloric receptivity regulating the confluent of heat exchanger to change heat exchanger, thus the control realized boiler bed temperature, the confluent of heat exchanger controls the size of the water yield according to bed temperature situation, general burning low moisture, the confluent of heat exchanger should be strengthened during low ash smelting point granular fuel, reduce fire box temperature, reduce confluent when burning high-moisture, high ash melting point granular fuel, keep suitable bed temperature.
Beneficial effect of the present invention: the ratio being adjusted the radiant heat absorption of burner hearth emulsion zone by the caloric receptivity regulating the confluent of heat exchanger to change heat exchanger, thus the control realized boiler bed temperature, substantially increase the fuel tolerance of boiler, improve the economic benefit of power plant, and the cycle extending recirculating fluidized bed biomass boiler safety, run continuously; Low stain thing discharges, and boiler adopts low flow velocity blast furnace hearth and empty flue to arrange the time of staying that greatly can extend fuel, effectively reduces CO discharge; Effectively fire box temperature is reduced by the layout of built-in heat exchanger, and staged air distribution, can effectively suppress NOx to generate; High boiler efficiency, burner hearth adopts full membrane type structure, and rational Insulation, reduces radiation loss; Back-end ductwork arranges that economizer, air preheater of secondary air, First air air preheater effectively control exhaust gas temperature, reduces boiler exhaust gas loss; Enable fuel sufficient combustion by fluidized bed type combustion system and prolongation fuel combustion time, improve boiler efficiency.
Accompanying drawing explanation
Fig. 1: embodiment of the present invention structural representation.
Fig. 2: bed temperature regulating system example structure schematic diagram of the present invention.
Fig. 3: Feed Water Regulation System example structure schematic diagram of the present invention.
In figure: igniter 1, inclined distributor 2, heat exchanger 3, feed pipe 4, secondary air channel 5, burner hearth 6, empty flue 7, convection bank 8, upper drum 9, lower drum 10, economizer 11, air preheater of secondary air 12, First air air preheater 13, water cooled wind chamber 14, burner hearth emulsion zone 15, recycle valve 16, drum 17, economizer 18, the feed water system of boiler 19, back-end ductwork 20, electric control valve 21, check-valves 22, stop valve 23, electric check valve 24.
Detailed description of the invention
Illustrate with reference to accompanying drawing and following concrete detailed description is done to the present invention, as shown in drawings, structure of the present invention comprises igniter 1, inclined distributor 2, heat exchanger 3, feed pipe 4, secondary air channel 5, burner hearth 6, empty flue 7, convection bank 8, upper drum 9, lower drum 10, economizer 11, air preheater of secondary air 12, First air air preheater 13, water cooled wind chamber 14, burner hearth emulsion zone 15, recycle valve 16, drum 17, economizer 18, the feed water system of boiler 19, back-end ductwork 20, electric control valve 21, check-valves 22, stop valve 23, electric check valve 24, it is characterized in that hanging a rear structure before boiler body adopts, boiler is double-barrel transverse formula structure, by burner hearth 6, empty flue 7, convection bank 8 and back-end ductwork 20 form, burner hearth 6 adopts fin panel casing, burner hearth 6 bottom is that back taper is arranged, burner hearth 6 bottom is built-in with heat exchanger 3 and inclined distributor 2, igniter 1 is arranged on the side of water cooled wind chamber 14, the top of water cooled wind chamber 14 is provided with inclined distributor 2,
Empty flue 7 is arranged between burner hearth 6 and convection bank 8, adopts water-cooled bag wall construction;
Convection bank 8 is arranged between upper drum 9 and lower drum 10, and convection bank 8 upper end is welded mutually with upper drum 9, and convection bank 8 lower end is welded mutually with lower drum 10, and the backhaul of convection bank 8 flue gas is three backhauls, and flue gas and pipe are in forward washing away; Economizer 11, air preheater of secondary air 12, First air air preheater 13 is arranged successively in back-end ductwork 20;
The burner hearth emulsion zone 15 of boiler is provided with heat exchanger 3, and this heat exchanger is built-in heat exchanger.
Using method: heat exchanger 3 feedwater comes from boiler water inlet pipe, from entering in heat exchanger 3 by electric control valve 21 and check-valves 22, water outlet directly enters drum 17, upper drum 9 and lower drum 10 form drum, between drum and heat exchanger 3, recycle valve 16 is provided with in order to protect heat exchanger 3, recycle valve 16 is by stop valve 23, electric check valve 24 forms, the ratio of the radiant heat absorption of burner hearth emulsion zone 15 is adjusted by the caloric receptivity regulating the confluent of heat exchanger 3 to change heat exchanger 3, thus the control realized boiler bed temperature, the confluent of heat exchanger 3 controls the size of the water yield according to bed temperature situation, general burning low moisture, the confluent of heat exchanger should be strengthened during low ash smelting point granular fuel, reduce fire box temperature, reduce confluent when burning high-moisture, high ash melting point granular fuel, keep suitable bed temperature.
Embodiment recited above is only be described the preferred embodiment of the present invention; not the spirit and scope of the present invention are limited; under the prerequisite not departing from design concept of the present invention; the various modification that in this area, common engineers and technicians make technical scheme of the present invention and improvement; protection scope of the present invention all should be fallen into; the technology contents of request protection of the present invention, all records in detail in the claims.
Claims (1)
1. be with the grain fluidized bed boiler of dedicated biomass of bed temperature regulating system, comprise igniter (1), inclined distributor (2), heat exchanger (3), feed pipe (4), secondary air channel (5), burner hearth (6), empty flue (7), convection bank (8), upper drum (9), lower drum (10), economizer (11), air preheater of secondary air (12), First air air preheater (13), water cooled wind chamber (14), burner hearth emulsion zone (15), recycle valve (16), drum (17), economizer (18), the feed water system of boiler (19), back-end ductwork (20), electric control valve (21), check-valves (22), stop valve (23), electric check valve (24), it is characterized in that hanging a rear structure before boiler body adopts, boiler is double-barrel transverse formula structure, by burner hearth (6), empty flue (7), convection bank (8) and back-end ductwork (20) composition, burner hearth (6) adopts fin panel casing, burner hearth (6) bottom is that back taper is arranged, burner hearth (6) bottom is built-in with heat exchanger (3) and inclined distributor (2), igniter (1) is arranged on the side of water cooled wind chamber (14), the top of water cooled wind chamber (14) is provided with inclined distributor (2), empty flue (7) is arranged between burner hearth (6) and convection bank (8), adopt water-cooled bag wall construction, convection bank (8) is arranged between upper drum (9) and lower drum (10), convection bank (8) upper end is welded mutually with upper drum (9), convection bank (8) lower end is welded mutually with lower drum (10), convection bank (8) flue gas backhaul is three backhauls, flue gas and pipe are in forward washing away, economizer (11), air preheater of secondary air (12), First air air preheater (13) is arranged successively in back-end ductwork (20), the burner hearth emulsion zone (15) of boiler is provided with heat exchanger (3), and this heat exchanger is built-in heat exchanger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510966738.8A CN105570860A (en) | 2015-12-18 | 2015-12-18 | Special biomass particle fluidized bed boiler with bed temperature regulating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510966738.8A CN105570860A (en) | 2015-12-18 | 2015-12-18 | Special biomass particle fluidized bed boiler with bed temperature regulating system |
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| Publication Number | Publication Date |
|---|---|
| CN105570860A true CN105570860A (en) | 2016-05-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510966738.8A Pending CN105570860A (en) | 2015-12-18 | 2015-12-18 | Special biomass particle fluidized bed boiler with bed temperature regulating system |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4712514A (en) * | 1986-09-05 | 1987-12-15 | Qinghua University | Fluidized bed boiler and high temperature separators used therein |
| CN1031412A (en) * | 1987-10-28 | 1989-03-01 | 浙江大学 | Internal circulating rotational flow fluidized bed combustion boiler |
| CN1800708A (en) * | 2005-11-30 | 2006-07-12 | 刘杰 | Fluidized bed boiler for burning gangue |
| CN201053671Y (en) * | 2007-04-20 | 2008-04-30 | 赵文利 | Thick oil thermal recovery injection circulated fluid bed boiler system |
| CN104755839A (en) * | 2012-10-11 | 2015-07-01 | 福斯特韦勒能源股份公司 | Fluidized bed heat exchanger |
| CN105042578A (en) * | 2015-08-15 | 2015-11-11 | 湖南博茂节能环保科技有限公司 | Coal and tobacco stem multi-fuel-fired boiler and contaminant control method thereof |
-
2015
- 2015-12-18 CN CN201510966738.8A patent/CN105570860A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4712514A (en) * | 1986-09-05 | 1987-12-15 | Qinghua University | Fluidized bed boiler and high temperature separators used therein |
| CN1031412A (en) * | 1987-10-28 | 1989-03-01 | 浙江大学 | Internal circulating rotational flow fluidized bed combustion boiler |
| CN1800708A (en) * | 2005-11-30 | 2006-07-12 | 刘杰 | Fluidized bed boiler for burning gangue |
| CN201053671Y (en) * | 2007-04-20 | 2008-04-30 | 赵文利 | Thick oil thermal recovery injection circulated fluid bed boiler system |
| CN104755839A (en) * | 2012-10-11 | 2015-07-01 | 福斯特韦勒能源股份公司 | Fluidized bed heat exchanger |
| CN105042578A (en) * | 2015-08-15 | 2015-11-11 | 湖南博茂节能环保科技有限公司 | Coal and tobacco stem multi-fuel-fired boiler and contaminant control method thereof |
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Application publication date: 20160511 |
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