CN102042584A - Novel biomass direct-fired boiler - Google Patents

Novel biomass direct-fired boiler Download PDF

Info

Publication number
CN102042584A
CN102042584A CN2011100004028A CN201110000402A CN102042584A CN 102042584 A CN102042584 A CN 102042584A CN 2011100004028 A CN2011100004028 A CN 2011100004028A CN 201110000402 A CN201110000402 A CN 201110000402A CN 102042584 A CN102042584 A CN 102042584A
Authority
CN
China
Prior art keywords
arch
burner hearth
grate
boiler
chain
Prior art date
Application number
CN2011100004028A
Other languages
Chinese (zh)
Other versions
CN102042584B (en
Inventor
董长青
张腾
杨勇平
张俊姣
陆强
王孝强
覃吴
Original Assignee
华北电力大学
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华北电力大学 filed Critical 华北电力大学
Priority to CN201110000402A priority Critical patent/CN102042584B/en
Publication of CN102042584A publication Critical patent/CN102042584A/en
Application granted granted Critical
Publication of CN102042584B publication Critical patent/CN102042584B/en

Links

Abstract

The invention belongs to the field of boiler equipment for bioelectrogenesis and particularly relates to a novel biomass direct-fired boiler. The boiler is of a combined arc structure consisting of a front arc and a rear arc. A hearth inlet of the boiler is connected with a spiral feeder or a hydraulic pusher; the upper part of the rear wall of the boiler is provided with a hearth outlet; the front arc is provided with an ignition air nozzle; the front wall and the rear arc are respectively provided with a secondary air nozzle; a chain or reciprocating grate is arranged on the lower part of the hearth close to the feeding port; a water cooling vibration grate is arranged behind the chain or reciprocating grate on the lower part of the hearth; a slag dropping port is arranged at the tail end of the water cooling vibration grate; a drying air chamber is arranged below the chain or reciprocating grate; and a primary air chamber is arranged below the water cooling vibration grate. The biomass direct-fired boiler can effectively solve the problem of low adaptability of biomass fuel in China, improve the burning efficiency and realize efficient and clean utilization of the biomass energy.

Description

A kind of novel biomass direct-combustion boiler
Technical field
The invention belongs to bioelectrogenesis and use the boiler plant field, be specifically related to a kind of novel biomass direct-combustion boiler.
Background technology
Problems such as the furnace grate that domestic some biomass power plant uses exists that combustion conditions is poor, burner hearth emits malleation, boiler fly ash and boiler slag carbon content height can't adapt at the designed boiler of single-fuel characteristic that domestic fuel range is wide, the high requirement of fuel moisture.The present invention solves problems such as fuel tolerance and efficiency of combustion by adopting means such as double grate, reasonable wind distribution.
Summary of the invention
The object of the invention is the characteristics wide at domestic biomass fuel scope, that moisture is high, by a kind of novel biomass direct-combustion boiler is provided, realizes the efficient and clean utilization of biomass energy.
The technical solution used in the present invention is:
The built-up arch structure that this boiler has adopted face arch and rear arch to form.Face arch and rear arch tilt to cover lower furnace portion, be connected with the back wall with front wall respectively, the burner hearth porch of this boiler is connected with feeding screw or hydraulic pressure material-pulling device, the burner hearth face arch plays dry and pre-heat effect to fuel, rear arch can make burner hearth rear portion high-temperature flue gas mix well with the lower-temperature atmosphere in burner hearth the place ahead, plays steady combustion, short combustion effect; The preceding half section set-point windburn nozzle of face arch is provided with overfire air jet respectively on front wall and the rear arch; The bottom of burner hearth, an end that enters the mouth near burner hearth are provided with chain or reciprocal grate, are the water-cooled vibrating-grate stoker at the rear of the bottom of burner hearth, described chain or reciprocal grate, and the burner hearth bottom right-hand member is the cinder notch that falls; Dry air compartment is set below described chain or reciprocal grate, air compartment is set below described water-cooled vibrating-grate stoker one time.
The vertical height of described face arch is than back sagitta 0.1~1m, face arch preceding half section and horizontal direction angle 30~80 degree, second half section and horizontal direction angle are 10~65 degree, and rear arch is 10~65 degree with the horizontal direction angle for preceding half section, and second half section and horizontal direction angle are 30~80 degree.
A described air compartment evenly is divided into 3~5 sections along its length, adopts the segmentation air distribution mode.
Face arch point windburn nozzle is vertical with the face arch wall, and front wall overfire air jet and front wall angle are 10~85 degree, and rear arch overfire air jet and rear arch angle are 10~85 degree.
Described dry air compartment is carried hot-air, in order to fuel dry and preheating chain or reciprocal grate top.
Beneficial effect of the present invention is: face arch can provide radiant energy that fuel is played dry and pre-heat effect, and rear arch cooperates with face arch can make burner hearth rear portion high-temperature flue gas mix well with the lower-temperature atmosphere in burner hearth the place ahead, plays steady combustion, short combustion effect; Fuel is at first fallen chain or reciprocal grate top after feeding screw or hydraulic pressure material-pulling device enter burner hearth, because its higher fire grate thermic load, fuel begins drying, falls water-cooled vibrating-grate stoker top afterwards and burns; The air compartment segmentation air distribution in water-cooled vibrating-grate stoker below by regulating each section air quantity, thereby can the based on fuel characteristics be regulated burning zone and after-flame section air quantity, improves burn-off rate and reduces the discharging of nitrogen oxide; Front wall, rear arch are furnished with overfire air jet, face arch layout points windburn nozzle, the in time required oxygen of aftercombustion, strengthen the gas stream in the stove disturbance simultaneously, organize the interior flue-gas swirl of burner hearth and flow, increase the fuel time of staying, can realize the efficient and clean utilization of biomass energy.
Description of drawings
Fig. 1 is a biomass boiler sectional view of the present invention.
Number in the figure:
The 1-face arch; The 2-rear arch; 3-feeding screw or hydraulic pressure material-pulling device; 4-chain or reciprocal grate; 5-water-cooled vibrating-grate stoker; The dry air compartment of 6-; Air compartment of 7-; The 8-cinder notch that falls; The 9-furnace outlet; The 10-overfire air jet; 11-point windburn nozzle; The 12-front wall; The 13-front wall.
The specific embodiment
The invention provides a kind of novel biomass direct-combustion boiler, the present invention is further described below in conjunction with the drawings and specific embodiments.
As shown in Figure 1, the burner hearth porch of this boiler is connected with feeding screw 3, and the upper boiler right side is provided with furnace outlet 9, and the front side of described furnace outlet 9 is a face arch 1, and rear side is a rear arch 2; On front wall 12, rear arch 2, overfire air jet 10 is set respectively; Face arch set-point windburn nozzle 11; The bottom of burner hearth, near an end of burner hearth inlet chain or reciprocal grate 4 are set, at the rear of the bottom of burner hearth, described chain or reciprocal grate 4 water-cooled vibrating-grate stoker 5 are set, water-cooled vibrating-grate stoker 5 is terminal to be provided with cinder notch 8; Dry air compartment 6 is set below described chain or reciprocal grate 4, air compartment 7 is set below described water-cooled vibrating-grate stoker 5 one time.
Fuel is delivered on chain or the reciprocal grate 4 by feeding screw 3, chain or reciprocal grate adopt conventional structure, the dry air compartment air-supply of chain or reciprocal grate 4 belows, the heat radiation of face arch 1 reflection simultaneously is to chain or reciprocal grate 4 fuel surfaces, fuel institute's water content under dry wind and face arch 1 radiation effects evaporates quickly, fugitive constituent is separated out quickly, and simultaneous temperature raises rapidly, provides good condition for next step burns on water-cooled vibrating-grate stoker 5.
An air compartment 7 that is connected with the water-cooled vibrating-grate stoker 5 that tilts evenly is divided into five air compartment segmentation air distributions along the fire grate length direction, according to each section of different fuel flexible modulation air quantity, make the burning zone full combustion of fuel, regulate burning zone and after-flame section air quantity simultaneously than to adapt to the discharging that fuel characteristic reduces nitrogen oxide simultaneously, realize the clean utilization of the energy.Fuel enters cinder notch 8 in the afterburnt along with the vibration of water-cooled vibrating-grate stoker 5.The maximum characteristics of an air compartment 5 are five sections air-supplies of branch, not only can flexible modulation burning zone and after-flame section air distributions, can also the based on fuel characteristic regulate each section air quantity before, during and after the burning zone.
Face arch 1 and rear arch 2 are made up of membrane wall.The vertical height of face arch is than back sagitta 0.1~1m.Rear arch 2 lower tilt, the top angle flattens slow gradually, and face arch 1 angle is mild, and this built-up arch helps forward and backward arch air-flow and mixes.The well-mixed time of staying of fugitive constituent in burner hearth that has increased fuel release simultaneously of forward and backward arch air-flow makes and fugitive constituent burning in time below burner hearth improved the temperature in the burner hearth, helps the burning of fire grate top fuel.Front wall 12 and rear arch 2 are arranged overfire air jet 10, face arch 1 layout points windburn nozzle 11, and this is arranged and strengthens flow perturbation in the burner hearth, has played facilitation for the burning of high-moisture fuel.The flue gas that fuel combustion produces flows to furnace outlet 9, carries out heat exchange with the rear heat exchanger.

Claims (5)

1. novel biomass direct-combustion boiler, it is characterized in that, the built-up arch structure that adopts face arch (1) and rear arch (2) to form, face arch (1) and rear arch (2) tilt to cover lower furnace portion, be connected with back wall (13) with front wall (12) respectively, the burner hearth porch of this boiler is connected with feeding screw or hydraulic pressure material-pulling device (3), burner hearth face arch (1) plays dry and pre-heat effect to fuel, rear arch (2) can make burner hearth rear portion high-temperature flue gas mix well with the lower-temperature atmosphere in burner hearth the place ahead, plays steady combustion, short combustion effect; The preceding half section set-point windburn nozzle of face arch (11) is provided with overfire air jet (10) respectively on front wall (12) and the rear arch (2); The bottom of burner hearth, near an end of burner hearth inlet chain or reciprocal grate (4) are set, in the bottom of burner hearth, the rear of described chain or reciprocal grate (4) is water-cooled vibrating-grate stoker (5), the burner hearth bottom right-hand member is the cinder notch that falls (8); Below at described chain or reciprocal grate (4) is provided with dry air compartment (6), in the below of described water-cooled vibrating-grate stoker (5) air compartment (7) is set.
2. a kind of novel biomass direct-combustion boiler according to claim 1, it is characterized in that, the vertical height of described face arch (1) is than the high 0.1~1m of rear arch (2), face arch (1) preceding half section and horizontal direction angle 30~80 degree, second half section and horizontal direction angle are 10~65 degree, rear arch (2) is 10~65 degree with the horizontal direction angle for preceding half section, and second half section and horizontal direction angle are 30~80 degree.
3. a kind of novel biomass direct-combustion boiler according to claim 1 is characterized in that a described air compartment (7) evenly is divided into 3~5 sections along its length, adopts the segmentation air distribution mode.
4. a kind of novel biomass direct-combustion boiler according to claim 1, it is characterized in that, face arch point windburn nozzle (11) is vertical with the face arch wall, and front wall overfire air jet and front wall angle are 10~85 degree, and rear arch overfire air jet and rear arch angle are 10~85 degree.
5. a kind of novel biomass direct-combustion boiler according to claim 1 is characterized in that, described dry air compartment (6) is carried hot-air, in order to fuel dry and preheating chain or reciprocal grate (4) top.
CN201110000402A 2011-01-04 2011-01-04 Novel biomass direct-fired boiler CN102042584B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201110000402A CN102042584B (en) 2011-01-04 2011-01-04 Novel biomass direct-fired boiler

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201110000402A CN102042584B (en) 2011-01-04 2011-01-04 Novel biomass direct-fired boiler

Publications (2)

Publication Number Publication Date
CN102042584A true CN102042584A (en) 2011-05-04
CN102042584B CN102042584B (en) 2012-10-10

Family

ID=43908965

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201110000402A CN102042584B (en) 2011-01-04 2011-01-04 Novel biomass direct-fired boiler

Country Status (1)

Country Link
CN (1) CN102042584B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102748772A (en) * 2012-07-25 2012-10-24 上海工业锅炉研究所 High-moisture vinasse fuel direct-fired boiler system
CN104791766A (en) * 2015-04-29 2015-07-22 广西梧锅锅炉制造有限公司 High-water-content biomass fuel boiler

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2301612Y (en) * 1997-09-10 1998-12-23 北京钠锘环境工程有限责任公司 Shaft type two-section chain grate waste incinerator
JP2002357308A (en) * 2001-06-01 2002-12-13 Kobe Steel Ltd Stoker type incinerator and incineration method thereby
CN2568977Y (en) * 2002-09-24 2003-08-27 山东鲁丰机械厂 Refuse incinerator with stepped horizontal reciprocating fire grate
CN101101119A (en) * 2007-08-01 2008-01-09 重庆科技学院 Multiple row sectional drive combined type domestic garbage incinerator

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2301612Y (en) * 1997-09-10 1998-12-23 北京钠锘环境工程有限责任公司 Shaft type two-section chain grate waste incinerator
JP2002357308A (en) * 2001-06-01 2002-12-13 Kobe Steel Ltd Stoker type incinerator and incineration method thereby
CN2568977Y (en) * 2002-09-24 2003-08-27 山东鲁丰机械厂 Refuse incinerator with stepped horizontal reciprocating fire grate
CN101101119A (en) * 2007-08-01 2008-01-09 重庆科技学院 Multiple row sectional drive combined type domestic garbage incinerator

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102748772A (en) * 2012-07-25 2012-10-24 上海工业锅炉研究所 High-moisture vinasse fuel direct-fired boiler system
CN102748772B (en) * 2012-07-25 2014-10-15 上海工业锅炉研究所 High-moisture vinasse fuel direct-fired boiler system
CN104791766A (en) * 2015-04-29 2015-07-22 广西梧锅锅炉制造有限公司 High-water-content biomass fuel boiler

Also Published As

Publication number Publication date
CN102042584B (en) 2012-10-10

Similar Documents

Publication Publication Date Title
CN101949535B (en) Low-ratio biomass circulating fluidized bed boiler and combustion method thereof
CN204693377U (en) High-moisture biomass fuel boiler
MX2008008951A (en) Wood-pellet cogeneration unit with stirling engine in condensing technology.
CN102297421B (en) W-type flame decoupling combustion furnace and decoupling combustion method
CN103216821B (en) Multi-stage stratified combustion system and method for primary air and secondary air of boiler
CN105240841B (en) A kind of many coal adaptabilities can adjust the low NOx drainage chain furnace of flue gas recirculation
CN203549916U (en) Strengthened-discharging-type cooking stove
CN101158468B (en) Coal fines high-temperature pre-warming method
CN202303465U (en) High-performance combustor
CN102620291B (en) Pulverized coal decoupling combustor with low nitrogen oxide discharge and pulverized coal decoupling combustion method with low nitrogen oxide discharge
CN101949542A (en) Three-layered secondary air low nitrogen oxide swirl burner
CN102330993B (en) Composite structure for high-temperature spiral secondary air and arch in biomass fuel chain boiler
CN105889901B (en) A kind of fixed grate boiler for the square bale stalk that burns
CN100572971C (en) A kind of novel organic heat carrier furnace of biomass combustion membrane type wall
CN102628589B (en) High-temperature and low-NOX combustion method and device for pulverized coal
CN105864748A (en) Combined combustion system of chain boiler
WO2015103831A1 (en) Fuel/gas-saving ignition and stable-combustion low-nitrogen swirling pulverized coal combustor
CN103134049A (en) Multi-corner tangential multi-scale pulverized coal decoupling combustion device and decoupling combustion method thereof
CN109945167B (en) A kind of front wall, the asymmetrical W flame boiler of rear wall Secondary Air
CN202546811U (en) Compound furnace arch and compound secondary air structure
CN202141027U (en) Environment-friendly energy-saving biomass hot pipe boiler
CN103629701B (en) A kind of forced-ventilated cooking stove
US9784445B2 (en) External bed type double-fluidized bed system for preventing boiler contamination
CN202501472U (en) Flat flame gas burner with low NOx emission
CN107559821B (en) The multiple-pass industrial coal powder boiler of flue gas recirculation and vortex burner overhead

Legal Events

Date Code Title Description
PB01 Publication
C06 Publication
SE01 Entry into force of request for substantive examination
C10 Entry into substantive examination
GR01 Patent grant
C14 Grant of patent or utility model
EE01 Entry into force of recordation of patent licensing contract

Application publication date: 20110504

Assignee: Suzhou electric North Star green technology company limited of China

Assignor: North China Electric Power University

Contract record no.: 2015990000855

Denomination of invention: Novel biomass direct-fired boiler

Granted publication date: 20121010

License type: Exclusive License

Record date: 20151016

LICC Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model