CN100498058C - Biomass fuel boiler - Google Patents

Biomass fuel boiler Download PDF

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Publication number
CN100498058C
CN100498058C CNB2007100490373A CN200710049037A CN100498058C CN 100498058 C CN100498058 C CN 100498058C CN B2007100490373 A CNB2007100490373 A CN B2007100490373A CN 200710049037 A CN200710049037 A CN 200710049037A CN 100498058 C CN100498058 C CN 100498058C
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CN
China
Prior art keywords
flue
biomass fuel
air
burner hearth
fuel boiler
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CNB2007100490373A
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Chinese (zh)
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CN101105336A (en
Inventor
万思本
蔡文钢
陈金火
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华西能源工业股份有限公司
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Priority to CNB2007100490373A priority Critical patent/CN100498058C/en
Publication of CN101105336A publication Critical patent/CN101105336A/en
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Publication of CN100498058C publication Critical patent/CN100498058C/en

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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E20/00Combustion technologies with mitigation potential
    • Y02E20/34Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery

Abstract

The invention discloses a biomass fuel boiler based on the original coal burning boiler. A primary air chamber, secondary air ports respectively equipped in a feed pipe and in a furnace cavity below the feed pipe, and a plurality of air ports equipped at the left and right sides of the furnace cavity and staggeredly arranged are connected with an air preheater, and a regulating baffle is respectively provided in each air ports. The invention realizes complete combustion of biomass fuel with suspension combustion as main combustion manner and grate firing as auxiliary combustion manner. As an improvement, the cross-sectional area of the combustion zone in the furnace cavity is larger than the burnout zone; a dregs condensing pipe equipped with a cooling water passage is provided at the inlet port of a first smoke flue; superheaters are disposed at different positions of the boiler in accordance with the type of biomass fuel; a vertical shaft smoke flue at tail portion is sequentially connected with a dust remover and an induced fan; and an adjacent furnace heating device is respectively equipped in the furnace cavity and the lower header tanks of the water-cooled wall of the first and second smoke flues. The invention can prevent high temperature corrosion, assure heat exchange efficiency and storage bin safety, shorten starting time, and prolong service life.

Description

Biomass fuel boiler
Technical field
The present invention relates to a kind of is the boiler of fuel with living beings such as stalks.
Background technology
According to statistics by the end of the year in 2004, the whole world is that the biomass fuel generator installation total amount of representative has reached 3,900 ten thousand kilowatts with the stalk, alternative 7,000 ten thousand tons of standard coals, it is wind-powered electricity generation, photoelectricity, the summation of renewable energy power generation amounts such as underground heat, and traditional coal-burning boiler, comprise drum, burner hearth, feed pipe, first flue, second flue, tail vertical well gas flue, an air compartment, the secondary blast device, the water-cooled vibrating-grate stoker, superheater, economizer, air preheater, pressure fan etc., can't be applied to biomass fuel, this is because biomass fuel proportion is little, volume is big, grate firing can not be realized abundant burning on fire grate, and in the burner hearth is malleation, the fuel that enters burner hearth might be blown into the feed bin of feed pipe top through feed pipe, causes fire; Secondly, part biological matter fuel has higher tar content, the flue gas that produces is than thickness, both easily went up coking at high temperature pipe (superheater etc.), the corrosion pipe also reduces heat exchange efficiency simultaneously, the flue gas of thickness is easily knotted at narrower flue place again, influences the proper flow of flue gas, reduces the heat exchange efficiency of boiler; Moreover the calorific value of biomass fuel is lower, moisture big, the difficulty of catching fire, and the start-up time of boiler is longer; People were at the characteristics of biomass fuel afterwards, boiler has been done certain improvement, as the patent No. be: ZL03150475 and application number are: two kinds of biomass fuel boilers of 200610029424, feeding hinge dragon is installed in the former feed pipe and in burner hearth, increases arch and the segmentation wind nozzle that links to each other with main air duct, this to biomass fuel catch fire and after-flame certain help is arranged, but its combustion system is a grate firing still, does not reach best combustion; The latter has increased the secondary air channel that links to each other with pressure fan below material inlet, its combustion system is grate firing and suspension combustion to a certain degree, but still based on grate firing, and secondary wind is the cold wind of normal temperature, temperature fluctuation is bigger in the stove, can not realize sufficient burning, the most important thing is the two all the flue gas of unresolved thickness to burn into and the influence of heat exchanging efficient and the safety problem of feed bin of pipe.
Summary of the invention
The objective of the invention is to above-mentioned deficiency, provide a kind of fully burning, protection pipe can realized not to be corroded, to guarantee short biomass fuel boiler of heat exchange efficiency and feed bin safety, start-up time at prior art.
For achieving the above object, biomass fuel boiler of the present invention, comprise drum, burner hearth, feed pipe, first flue, second flue, tail vertical well gas flue, air compartment, secondary blast device, water-cooled vibrating-grate stoker, economizer, air preheater, pressure fan etc., wherein be equipped with water-cooling wall and upper and lower collection case, it is characterized in that an air compartment is connected with the hot-flow flue of air preheater by airduct at burner hearth, first flue and second flue; The secondary blast device comprises the overfiren air port in the burner hearth that is separately positioned in the feed pipe, below the feed pipe and is arranged on the burner hearth left and right sides and staggered several overfiren air ports, all overfiren air ports all are connected with the hot-flow flue of air preheater, and are equipped with controllable register in each air outlet of an air compartment and all overfiren air ports;
The cold wind that comes from pressure fan four the tunnel is sent into burner hearth being divided into after the air preheater heating: the first via enters burner hearth bottom by each air outlet of an air compartment; The second the tunnel, enter burner hearth by the overfiren air port in the feed pipe with fuel; Third Road enters burner hearth by the overfiren air port in the burner hearth of feed pipe below; The four the tunnel, enter burner hearth by being arranged on burner hearth left and right sides and staggered several overfiren air ports; During boiler operatiopn, if biomass fuel moisture content is less, to go into the stove granularity shorter, impurities is less, and then most fuel are subjected to the acting in conjunction of four transportation work styles to be suspended in aerial burning; Otherwise, then regulate the proportioning of primary and secondary air again by controllable register, make part of fuel be suspended in aerial burning, part of fuel drops on the fire grate burns, based on suspension combustion, grate firing is auxilliary, realizes the abundant burning of biomass fuel, and the primary and secondary air of high temperature makes the temperature fluctuation in the burner hearth less, also helps realizing abundant burning;
As a further improvement on the present invention, the furnace wall of described burner hearth face arch and rear arch below is distinguished forward, the rear expansion, the combustion zone cross section of face arch and rear arch below is greater than the burning-out zone cross section of its top, can strengthen the volume of combustion zone, avoid the temperature of combustion zone too high, coking appears in the pipe (water-cooling wall, fire grate etc.) that prevents the combustion zone, avoids burn into to guarantee heat exchange efficiency;
As a further improvement on the present invention, in being furnished with, inlet the place ahead of first flue establishes the Crust blocks pipe bundle of cooling water channel, cooling water is arranged in the Crust blocks pipe bundle, its surface temperature is lower, can prevent coking, the dope in the flue gas is condensed thereon, purify flue gas, guarantee the proper flow of flue gas in the flue of back, guarantee heat exchange efficiency;
As a further improvement on the present invention, also be provided with back screen superheater in the burner hearth in Crust blocks pipe bundle the place ahead, this kind setting is suitable for the lower grey stalk biomass fuel of tar content, although temperature is higher, also is difficult for coking herein;
As a further improvement on the present invention, in first flue, also be provided with pipe and flue pendant superheater in the same way, this kind setting is suitable for the higher yellow stalk biolobic material fuel of tar content, makes flue gas and pendant superheater be parallel baffled, prevents coking;
As a further improvement on the present invention, tail vertical well gas flue also links to each other with deduster, air-introduced machine successively, and boiler burner hearth in running is in negative pressure state all the time, and the fuel that prevents to enter burner hearth is blown into the feed bin of feed pipe top, guarantees safety;
As a further improvement on the present invention, also be provided with adjacent stove heater respectively in burner hearth, first flue and second flue three next part case separately, this neighbour's stove heater comprises the pipe that is provided with steam inlet, several steam distribution holes and several gripper shoes; As long as there is other steam boiler that is moving at the scene, just can borrow steam to the next part case by steam inlet temporarily, shorten the boiler startup time;
As a further improvement on the present invention, on the both walls of lower furnace portion combustion zone, also be provided with oil burner; Further shorten the boiler startup time;
As a further improvement on the present invention, the internal duct two ends of water-cooled vibrating-grate stoker link to each other with economizer with drum respectively, are provided with recirculating line between the inlet header case of economizer and drum, and recirculating line is provided with stop valve; When boiler startup, this recirculating line should be opened, make between drum and water-cooled grate, economizer and form natural convection loop, prevent economizer and water-cooled vibrating-grate stoker overtemperature, steam, when shortening the boiler startup time, can protect economizer, fire grate not to be damaged again; When normal operation, close this pipeline;
In sum, the present invention can realize that the abundant burning of biomass fuel, protection pipe are not corroded, guarantee heat exchange efficiency and feed bin safety, shorten start-up time, long service life.
Description of drawings
Fig. 1 is the structural representation of the embodiment of the invention one.
Fig. 2 is the structural representation of the embodiment of the invention two.
Fig. 3 is the structured flowchart of the air and gas system of two embodiment.
Fig. 4 is two embodiment right-side wall partial sectional views.
Fig. 5 is that the A of Fig. 1 is to partial view.
Fig. 6 is the structural representation of adjacent stove heater in the two embodiment next part casees.
The partial structurtes block diagram of the boiler circuit of Fig. 7 two embodiment.
The specific embodiment
Embodiment one
This biomass fuel boiler is suitable for the higher yellow stalk biolobic material of tar content, by shown in Figure 1, comprise drum 1, burner hearth 2, feed pipe 3, first flue 4, second flue 5, tail vertical well gas flue 6, air compartment 7, secondary blast device, water-cooled vibrating-grate stoker 8, economizer 9, air preheater 10, pressure fan (not shown) etc., wherein be equipped with water-cooling wall and upper and lower collection case at burner hearth 2, first flue 4 and second flue 5; By shown in Figure 3, one time air compartment is connected with the hot-flow flue of air preheater by airduct; The secondary blast device comprises the overfiren air port in the burner hearth that is separately positioned in the feed pipe, below the feed pipe and several overfiren air ports of two rows that are arranged on the burner hearth left and right sides, (as shown in Figure 1 and Figure 4, overfiren air port 20 is staggered), all overfiren air ports all are connected with the hot-flow flue of air preheater, and in each air outlet of an air compartment and all overfiren air ports, being equipped with controllable register, tail vertical well gas flue also links to each other with deduster, air-introduced machine successively; By shown in Figure 1, the furnace wall of the face arch of burner hearth 2 and rear arch below is distinguished forward, the rear expansion, the cross section of face arch and combustion zone 11, rear arch below is greater than the cross section of its top burning-out zone 12, in being furnished with, inlet the place ahead of first flue 4 establishes the Crust blocks pipe bundle 13 of cooling water channel, in the Crust blocks pipe bundle 13 cooling water is arranged, in first flue 4, also be provided with pendant superheater 14, (as shown in Figure 5, the pipe of pendant superheater 14 and flue are in the same way); Also be provided with adjacent stove heater respectively in burner hearth 2, first flue 4 and second flue, 5 threes next part case 15 separately, this neighbour's stove heater comprises the pipe (as shown in Figure 6) that is provided with steam inlet 16, several steam distribution holes 17 and several gripper shoes 18; On the both walls of furnace combustion zone 11, also be provided with oil burner 19; By shown in Figure 7, the internal duct two ends of water-cooled vibrating-grate stoker (outlet collection case and inlet header case) links to each other with economizer with drum respectively, is provided with recirculating line between the inlet header case of economizer and drum, and recirculating line is provided with stop valve;
When boiler startup, as long as there is other steam boiler that is moving at the scene, just can borrow steam to next part case 15 by the steam inlet 16 of adjacent stove heater temporarily, restart oil burner 19, shorten the boiler startup time; Simultaneously recirculating line is opened, made between drum and water-cooled grate, economizer and form natural convection loop, prevent economizer and water-cooled vibrating-grate stoker overtemperature, steam, protection economizer, fire grate are not damaged; When normal operation, close this pipeline; The cold wind that comes from pressure fan four the tunnel is sent into burner hearth being divided into after the air preheater heating: the first via enters burner hearth bottom by each air outlet of an air compartment; The second the tunnel, enter burner hearth by the overfiren air port in the feed pipe with fuel; Third Road enters burner hearth by the overfiren air port in the burner hearth of feed pipe below; The four the tunnel, enter burner hearth by being arranged on burner hearth left and right sides and staggered several overfiren air ports; During boiler operatiopn, if biomass fuel moisture content is less, to go into the stove granularity shorter, impurities is less, and then most fuel are subjected to the acting in conjunction of four transportation work styles to be suspended in aerial burning; Otherwise, then regulate the proportioning of primary and secondary air again by controllable register, make part of fuel be suspended in aerial burning, part of fuel drops on the fire grate burns, based on suspension combustion, grate firing is auxilliary, realizes the abundant burning of biomass fuel, and the primary and secondary air of high temperature makes the temperature fluctuation in the burner hearth less, also helps realizing abundant burning; Make burner hearth be in negative pressure state all the time by air-introduced machine, the fuel that prevents to enter burner hearth is blown into the feed bin of feed pipe top, guarantees safety; Because the cross section of combustion zone 11 greater than the cross section of burning-out zone 12, can strengthen the volume of combustion zone 11, avoids the temperature of combustion zone 11 too high, prevents that coking from appearring in the pipe of combustion zone 11, avoid burn into to guarantee heat exchange efficiency; The surface temperature of Crust blocks pipe bundle 13 is lower, can prevent coking, and the dope in the flue gas is condensed thereon, purifies flue gas, guarantees the proper flow of flue gas in the flue of back, guarantees heat exchange efficiency; Flue gas and pendant superheater 14 are parallel baffled, prevent coking;
Embodiment two
This biomass fuel boiler is suitable for the lower grey stalk biomass of tar content, by shown in Figure 2, the difference of it and embodiment one only is that the back screen superheater 21 with Crust blocks pipe bundle 13 the place aheads has replaced among the figure 4 pendant superheater 14 in first flue, because the tar content of grey stalk is lower, even at high temperature also be difficult for coking, pipe can not be corroded, thereby guarantees heat exchange efficiency.

Claims (9)

1. biomass fuel boiler, comprise drum, burner hearth, feed pipe, first flue, second flue, tail vertical well gas flue, air compartment, secondary blast device, water-cooled vibrating-grate stoker, economizer, air preheater, pressure fan etc., wherein be equipped with water-cooling wall and upper and lower collection case, it is characterized in that an air compartment is connected with the hot-flow flue of air preheater by airduct at burner hearth, first flue and second flue; The secondary blast device comprises the overfiren air port in the burner hearth that is separately positioned in the feed pipe, below the feed pipe and is arranged on the burner hearth left and right sides and staggered several overfiren air ports, all overfiren air ports all are connected with the hot-flow flue of air preheater, and are equipped with controllable register in each air outlet of an air compartment and all overfiren air ports.
2. biomass fuel boiler according to claim 1 is characterized in that the burning-out zone cross section of the combustion zone cross section of described burner hearth face arch and rear arch below greater than its top.
3. biomass fuel boiler according to claim 1 and 2 is characterized in that establishing the Crust blocks pipe bundle of cooling water channel in inlet the place ahead of first flue also is furnished with.
4. biomass fuel boiler according to claim 3 is characterized in that also being provided with back screen superheater in the burner hearth in Crust blocks pipe bundle the place ahead.
5. biomass fuel boiler according to claim 3 is characterized in that also being provided with pipe and flue pendant superheater in the same way in first flue.
6. according to claim 4 or 5 described biomass fuel boilers, it is characterized in that tail vertical well gas flue also links to each other with deduster, air-introduced machine successively.
7. biomass fuel boiler according to claim 6, it is characterized in that also being provided with adjacent stove heater respectively in burner hearth, first flue and second flue three next part case separately, this neighbour's stove heater comprises the pipe that is provided with steam inlet, several steam distribution holes and several gripper shoes.
8. biomass fuel boiler according to claim 7 is characterized in that also being provided with oil burner on the both walls of lower furnace portion combustion zone.
9. biomass fuel boiler according to claim 8, the internal duct two ends that it is characterized in that the water-cooled vibrating-grate stoker link to each other with economizer with drum respectively, also be provided with recirculating line between the inlet header case of economizer and drum, recirculating line is provided with stop valve.
CNB2007100490373A 2007-04-30 2007-04-30 Biomass fuel boiler CN100498058C (en)

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Application Number Priority Date Filing Date Title
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CN100498058C true CN100498058C (en) 2009-06-10

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Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101793388A (en) * 2010-03-03 2010-08-04 朴显泽 Biomass preventing corrosion of superheater and garbage power generation boiler
CN101839475B (en) * 2010-04-13 2011-06-01 广东兆丰能源技术有限公司 Biomass fuel combustion device
CN102230634B (en) * 2011-06-17 2016-04-06 江苏太湖锅炉股份有限公司 Dust removal device for rear arch
CN102418916A (en) * 2011-12-06 2012-04-18 山西蓝天环保设备有限公司 Oil field gas injection boiler taking pulverized coal as fuel
CN103791486B (en) * 2012-10-30 2016-04-06 国惠环保新能源有限公司 Vertical preheating segmentation low-temperature burning fixed bed boiler
CN103234216A (en) * 2013-04-09 2013-08-07 无锡华光锅炉股份有限公司 Secondary air arranging structure of straw boiler
CN105222151A (en) * 2014-06-03 2016-01-06 国网山西省电力公司电力科学研究院 The method of the hot Secondary Air heating furnace of adjacent stove and device
CN104390229B (en) * 2014-11-03 2016-08-24 郭强 Take the air supply method of the boiler of air zoning
CN105115155A (en) * 2015-08-13 2015-12-02 浙江明佳环保科技有限公司 Biofuel hot-blast stove
CN106594698A (en) * 2016-12-30 2017-04-26 江苏东九重工股份有限公司 Biomass direct-fired boiler
CN109210558A (en) * 2018-09-07 2019-01-15 曾金玉 A kind of biomass boiler high-temperature flue gas purification processing unit
CN111207387B (en) * 2020-01-16 2021-05-04 吉林宏日新能源股份有限公司 Biomass fuel hot blast stove

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005195237A (en) * 2004-01-06 2005-07-21 Yoshimine:Kk Boiler
CN1900589A (en) * 2006-07-27 2007-01-24 上海四方锅炉厂 Biological mass-energy fuel boiler and its burning method
CN201053749Y (en) * 2007-04-30 2008-04-30 华西能源工业股份有限公司 Biomass fuel boiler

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005195237A (en) * 2004-01-06 2005-07-21 Yoshimine:Kk Boiler
CN1900589A (en) * 2006-07-27 2007-01-24 上海四方锅炉厂 Biological mass-energy fuel boiler and its burning method
CN201053749Y (en) * 2007-04-30 2008-04-30 华西能源工业股份有限公司 Biomass fuel boiler

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