CN204345616U - Living beings chain-grate boiler chamber structure - Google Patents

Living beings chain-grate boiler chamber structure Download PDF

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Publication number
CN204345616U
CN204345616U CN201420840021.XU CN201420840021U CN204345616U CN 204345616 U CN204345616 U CN 204345616U CN 201420840021 U CN201420840021 U CN 201420840021U CN 204345616 U CN204345616 U CN 204345616U
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China
Prior art keywords
combustion chamber
hogging
arch
wall
grate
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Expired - Fee Related
Application number
CN201420840021.XU
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Chinese (zh)
Inventor
刘圣勇
青春耀
索化宁
陶红歌
王鹏晓
夏许宁
张品
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Henan Agricultural University
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Henan Agricultural University
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Priority to CN201420840021.XU priority Critical patent/CN204345616U/en
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Publication of CN204345616U publication Critical patent/CN204345616U/en
Expired - Fee Related legal-status Critical Current
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Abstract

The utility model discloses a kind of living beings chain-grate boiler chamber structure, comprise traveling-grate stoker, chain fire-gate top is provided with face arch from front to back successively, hogging and rear arch, the fuel bed district for placing fuel bed is provided with on the upside of traveling-grate stoker, hogging is made up of vertical foldede flame wall, rear arch is made up of the horizontal wall that the front and back being arranged on rear side bottom foldede flame wall are laterally extending, vault is provided with between face arch and hogging, the first combustion chamber is provided with between face arch and hogging, hogging, the second combustion chamber is formed between rear arch and traveling-grate stoker, the rear side of rear arch is provided with vertical rear furnace wall, hogging, the 3rd combustion chamber is provided with between rear arch and rear furnace wall, flue gas mouth is set out on rear side of 3rd top, combustion chamber, 3rd top of combustion chamber is provided with smoke gas port, 3rd bottom of combustion chamber be provided with the second combustion chamber enter flue gas mouth.The utility model is that one can make fuel Thorough combustion in burner hearth, strengthens the living beings chain-grate boiler chamber structure of heat exchange efficiency.

Description

Living beings chain-grate boiler chamber structure
Technical field
The utility model belongs to biomass combustion furnace field, is specifically related to a kind of living beings chain-grate boiler chamber structure.
Background technology
Chimney arch protrudes from the prone furnace wall of burner hearth interior wall, and its form has tilting or level---tilting.The fuel gas produced by reducing zone and bring the fuel powder of burner hearth into air-flow, coke particle fully mixes with air under the effect of chimney arch, burning after-flame, decreases gas and heat loss due to unburned carbon, improves efficiency of combustion; On the other hand, chimney arch can make heat radiation and heat smoke flowing in stove obtain rationalization, ensures newly to enter that fuel can catch fire in time, smooth combustion.Chimney arch can be divided into following three kinds by the difference of present position:
Face arch---be positioned at the top of grate front portion, work to accelerate fresh fuel and ignite, therefore also known as arch or the radiant arch of igniting, have the forms such as horizontal, tilting and anti-obliquity formula.The radiation mode of face arch is radiation is again master, mirror is reflected into auxiliary, by this kind of mode, radiant heat is delivered to fresh fuel ignition zone, improves the speed of fuel fire and burning.
Hogging---be positioned at the top in the middle part of grate, length is shorter, flexible arrangement, expense be low, be generally applicable to boiler improvement.
Rear arch---is positioned at the top at grate rear portion, has uniclinal inclined, level---tilting and two tiltings etc.The Main Function of rear arch has following:
(1) form aditus laryngis with face arch, can flow perturbation be strengthened, make combustible fully mix with air and be conducive to burning, extend the residence time of air-flow in stove, very favourable to the after-flame of combustible;
(2) a large amount of high-temperature flue gas, red-hot carbon granule and excessive air are delivered to fuel combustion zone, further enhance burning, fuel gas after-flame under the effect of oxygen of furnace cavity, therefore ignition temperature is improved;
(3) hot flue gas and the red as fire carbon granule carried secretly thereof are directed to front end under rear arch action, rocket motor upwards time be subject to inertial separation effect, red as fire carbon granule falls fresh fuel layer, is conducive to ignition;
(4) burnt zone is had to the effect of the short combustion of insulation, reduce heat loss due to sensible heat in slag widely, boiler efficiency is improved.
Whether the fuel on fuel bed can carry out burns strongly and completely, not only depends on that the visible calorific intensity of suitable fire grate, reasonably burner hearth are arranged and the method for operation, and also depends on geometry and the size of chimney arch to a great extent.But existing biomass boiler is mostly coal-fired boiler reform, because the combustion characteristics of biomass molding fuel and burning of coal characteristic are very different, there are some problems when biomass burning shaped fuel in the boiler of conventional chimney arch design: thermal-flame can not stop time enough in burner hearth, combustible component fully can not mix with air, causes the combustible gas such as carbon monoxide, methane and solid combustible granule content in flue gas higher.
Utility model content
The purpose of this utility model is to provide one can make fuel Thorough combustion in burner hearth, and the time of staying of flue gas in burner hearth is extended greatly, makes high-temperature flue gas and the abundant heat exchange of convection bank, strengthens the living beings chain-grate boiler chamber structure of heat exchange efficiency.
For achieving the above object, the utility model adopts following technical scheme: living beings chain-grate boiler chamber structure, comprise traveling-grate stoker, chain fire-gate top is provided with face arch from front to back successively, hogging and rear arch, the fuel bed district for placing fuel bed is provided with on the upside of traveling-grate stoker, hogging is made up of vertical foldede flame wall, rear arch is made up of the horizontal wall that the front and back being positioned at rear side bottom foldede flame wall are laterally extending, vault is provided with between face arch and hogging, the first combustion chamber is provided with between face arch and hogging, hogging, the second combustion chamber is formed between rear arch and traveling-grate stoker, the rear side of rear arch is provided with vertical rear furnace wall, hogging, the 3rd combustion chamber is provided with between rear arch and rear furnace wall, flue gas mouth is set out on rear side of 3rd top, combustion chamber, 3rd top of combustion chamber is provided with smoke gas port, 3rd bottom of combustion chamber be provided with the second combustion chamber enter flue gas mouth, overfiren air port is provided with respectively on face arch He in hogging, on face arch in overfiren air port and hogging overfiren air port for arrange in opposite directions, on face arch, the air-out direction of overfiren air port points to the fuel bed district of downside in the middle part of the first combustion chamber, in hogging, the air-out direction of overfiren air port also points to the fuel bed district of downside in the middle part of the first combustion chamber, and chain fire-gate rear end is positioned at the underside of forward of horizontal wall.
On front side of described foldede flame wall top and be provided with circular arc chamfering between vault, on front side of the bottom of foldede flame wall, be also provided with circular arc chamfering.
In described hogging, overfiren air port is arranged on the circular arc chamfering place, bottom of foldede flame wall.
Face arch top is extension obliquely from front to back, bottom extends for vertical, and the overfiren air port of face arch is arranged on the vertical extension of face arch.
Described foldede flame wall is for vertical extension and foldede flame wall bottom is provided with bending part backward.
Described rear furnace wall is provided with the cleaning door with the 3rd combustion chamber, and the corresponding cleaning door in outside of rear furnace wall arranges shoot door.
Bellows are provided with on the downside of described first combustion chamber.
Living beings chain-grate boiler chamber structure described in the utility model, has following beneficial effect:
1. there is Novel furnace arch structure: burner hearth uses full chimney arch to design, face arch extends in the middle part of burner hearth, and add one foldede flame wall as hogging, face arch, between hogging and fire grate, form the first combustion chamber, rear arch is one horizontal wall, rear arch, foldede flame wall and traveling-grate stoker form the second combustion chamber, and flue gas enters the 3rd combustion chamber from the flue gas mouth that enters between foldede flame wall and rear arch.Burner hearth is divided into three regions by chimney arch---and the first combustion chamber, the second combustion chamber and the 3rd combustion chamber, extend the time of staying of high-temperature flue gas in burner hearth, improves efficiency of combustion.Flue gas burns in the first combustion chamber under First air effect; A depositing dust and second-time burning is carried out in second combustion chamber; When flue gas enters the 3rd combustion chamber, flow velocity reduces, and flue gas carries out secondary dust removing, improves burnout rate, reduces soot emissions.
2. there is novel secondary wind system: be positioned at that the overfiren air port of face arch is downward-sloping to be allowed in the middle part of wind to the first chamber fuel layer, the overfiren air port declining forward being positioned at hogging tiltedly can allow in the middle part of wind to the first chamber fuel layer, forms subtend flow perturbation at fuel bed upper area.This design extends the time of staying of high-temperature flue gas in the first combustion chamber, optimizes thermal field in stove simultaneously, improves the after-flame degree of Boiler Stable Combustion ability and fuel, make flame not adherent, do not rush wall, degree of filling is high, wall thermic load is even.
3. the top of front side of hogging that formed of foldede flame wall and bottom all adopt circular arc chamfering design, and it is more smooth that this design makes high-temperature flue gas flow in burner hearth, flows, optimize flow of flue gas without dead angle.
4. arrange shoot door at the rear furnace wall of burner hearth afterbody, during biomass fuel combustion, a small amount of ash content gently can move along with high-temperature flue gas together due to quality, is finally deposited on the horizontal wall of rear arch, and the lime-ash of deposition and flue dust regularly can be removed by shoot door.
Living beings chain-grate boiler chamber structure described in the utility model, biomass fuel is moved into burner hearth first combustion chamber along with chain fire-gate, first combustion chamber is primary combustion zone, under First air and Secondary Air are used, biomass molding fuel burns, the high-temperature flue gas radiation heat transfer in burner hearth produced, finally walks around foldede flame wall and enters the second combustion chamber.Second combustion chamber is intermediate zone, and the fuel gas such as the carbon monoxide contained in high-temperature flue gas, methane and solid combustible particle burn away heat transfer, and part flue dust here lands.Flue gas after second-time burning enters the 3rd combustion chamber by the perforate between foldede flame wall and rear arch.Flue gas is further depositing dust in the 3rd combustion chamber, under induced draught system effect, enter flue.The soot dust granule of the first combustion chamber and the accumulation of the second combustion chamber in burner hearth and lime-ash are discharged by fire grate motion, and the soot dust granule in the 3rd combustion chamber and lime-ash are removed by shoot door.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Detailed description of the invention
Living beings chain-grate boiler chamber structure as shown in Figure 1, comprises traveling-grate stoker 7, and the top of traveling-grate stoker 7 is provided with face arch 2, hogging and rear arch from front to back successively.
Face arch 2 top is that extension obliquely from front to back, face arch 2 bottom are for vertically extending.
Hogging is made up of vertical foldede flame wall 5, and foldede flame wall 5 is vertically extend, and foldede flame wall 5 bottom is provided with bending part backward.
Rear arch is made up of the horizontal wall 6 that the front and back being positioned at rear side bottom foldede flame wall 5 are laterally extending, and horizontal wall 6 is anterior-posterior horizontal extension.The rear end of traveling-grate stoker 7 is positioned at the underside of forward of horizontal wall 6.
The equal interval of face arch 2, hogging and rear arch is located at above traveling-grate stoker 7, is provided with the fuel bed district 4 for placing fuel bed on the upside of traveling-grate stoker 7.Fuel bed district 4 is for being positioned at the bar-shaped zone on the upside of traveling-grate stoker 7.Vault 13 is provided with, the partition wall that described vault 13 extends for anterior-posterior horizontal between face arch 2 and hogging.On front side of described foldede flame wall 5 top and be provided with circular arc chamfering between vault 13, on front side of the bottom of foldede flame wall 5, be also provided with circular arc chamfering.
Be provided with the first combustion chamber 14, combustion chamber 14, first between face arch 2 and hogging to be enclosed by the vault 13 between face arch 2, hogging and face arch 2 and hogging and form.The second combustion chamber 15 is formed on the downside of hogging, on the downside of rear arch and between traveling-grate stoker 7.The rear side of rear arch is installed with vertical rear furnace wall, rear furnace wall top extends on the upside of horizontal wall 6, bottom extends on the downside of horizontal wall 6, hogging, the 3rd combustion chamber 11 is provided with between rear arch and rear furnace wall, i.e. hogging, the U-shaped region be enclosed to form on the upside of rear arch and afterwards furnace wall is the 3rd combustion chamber 11, the top of the 3rd combustion chamber 11 is provided with body of wall 10 and the smoke gas port 9 of anterior-posterior horizontal, and smoke gas port 9 is positioned on rear side of the top of the 3rd combustion chamber 11, smoke gas port 9 is that the gap between the body of wall 10 of level and rear furnace wall top is (certain, the utility model is not limited to above-mentioned form, also body of wall 10 can be covered the top of whole 3rd combustion chamber 11, smoke gas port 9 is opened in the rear side of body of wall 10), 3rd combustion chamber 11 be provided be communicated with the second combustion chamber 15 enter flue gas mouth 16, bottom hogging and horizontal wall 6 front end is that interval is arranged, gap bottom hogging and between horizontal wall 6 front end for described in enter flue gas mouth 16, smoke gas port 9 and enter the top that flue gas mouth 16 lays respectively at the 3rd combustion chamber 11, bottom.Smoke gas port 9 connects flue, and flue connects induced draught system, and under induced draught system effect, be convenient to discharge flue gas, flue and induced draught system are prior art, therefore do not describe in detail, and also not shown in figure.
Bellows 3 are provided with on the downside of described first combustion chamber 14.No. one time bellows 3 can provide First air, and No. one time bellows 3 are installed on body of heater, and between the upper and lower layer chain of traveling-grate stoker 7, No. one time bellows 3 are prior art, therefore do not describe in detail.
Overfiren air port 1 is provided with respectively on face arch 2 He in hogging, on face arch 2 in overfiren air port 1 and hogging overfiren air port 1 for arrange in opposite directions, the overfiren air port 1 of face arch 2 is arranged on the vertical extension of face arch 2, and in described hogging, overfiren air port 1 is arranged on the circular arc chamfering place, bottom of foldede flame wall 5.On face arch 2, the air-out direction of overfiren air port 1 is tilted to the fuel bed district 4 of downside in the middle part of lower sensing first combustion chamber 14, and in hogging, the air-out direction of overfiren air port 1 is also tilted to the fuel bed district 4 of downside in the middle part of lower sensing first combustion chamber 14.Overfiren air port 1 is connected with secondary air feed system, and secondary air feed system is prior art, therefore does not describe in detail.
Described rear furnace wall is provided with the cleaning door be connected with the 3rd combustion chamber 11, and the corresponding cleaning door in outside of rear furnace wall arranges shoot door 8.
Living beings chain-grate boiler chamber structure described in the utility model, operationally, fuel bed is placed in fuel bed district 4, biomass fuel is moved into burner hearth first combustion chamber 14 along with traveling-grate stoker 7, first combustion chamber 14 is primary combustion zone, and under First air and Secondary Air are used, biomass molding fuel burns, the high-temperature flue gas radiation heat transfer in burner hearth produced, finally walks around foldede flame wall 5 and enters the second combustion chamber 15.Second combustion chamber 15 is intermediate zone, and the fuel gas such as the carbon monoxide contained in high-temperature flue gas, methane and solid combustible particle burn away heat transfer, and part flue dust here lands.Flue gas after second-time burning enters the 3rd combustion chamber 11 by the perforate between foldede flame wall 5 and rear arch.Flue gas is further depositing dust in the 3rd combustion chamber 11, under induced draught system effect, enter flue.The soot dust granule of the first combustion chamber 14 and the accumulation of the second combustion chamber 15 in burner hearth and lime-ash are discharged by fire grate motion, and the soot dust granule in the 3rd combustion chamber 11 and lime-ash are removed by shoot door 8.The flue gas flow direction line 12 first flowing in arch in the first combustion chamber 14, then walk around the second combustion chamber 15, then the bottom walking around foldede flame wall 5 enters the 3rd combustion chamber 11, then discharged by smoke gas port 9, whole flue gas flow direction line 12 is in wavy.

Claims (7)

1. living beings chain-grate boiler chamber structure, comprise traveling-grate stoker, it is characterized in that: chain fire-gate top is provided with face arch from front to back successively, hogging and rear arch, the fuel bed district for placing fuel bed is provided with on the upside of traveling-grate stoker, hogging is made up of vertical foldede flame wall, rear arch is made up of the horizontal wall that the front and back being positioned at rear side bottom foldede flame wall are laterally extending, vault is provided with between face arch and hogging, the first combustion chamber is provided with between face arch and hogging, hogging, the second combustion chamber is formed between rear arch and traveling-grate stoker, the rear side of rear arch is provided with vertical rear furnace wall, hogging, the 3rd combustion chamber is provided with between rear arch and rear furnace wall, flue gas mouth is set out on rear side of 3rd top, combustion chamber, 3rd top of combustion chamber is provided with smoke gas port, 3rd bottom of combustion chamber be provided with the second combustion chamber enter flue gas mouth, overfiren air port is provided with respectively on face arch He in hogging, on face arch in overfiren air port and hogging overfiren air port for arrange in opposite directions, on face arch, the air-out direction of overfiren air port points to the fuel bed district of downside in the middle part of the first combustion chamber, in hogging, the air-out direction of overfiren air port also points to the fuel bed district of downside in the middle part of the first combustion chamber, and chain fire-gate rear end is positioned at the underside of forward of horizontal wall.
2. living beings chain-grate boiler chamber structure as claimed in claim 1, is characterized in that: on front side of described foldede flame wall top and be provided with circular arc chamfering between vault, is also provided with circular arc chamfering on front side of the bottom of foldede flame wall.
3. living beings chain-grate boiler chamber structure as claimed in claim 2, is characterized in that: in described hogging, overfiren air port is arranged on the circular arc chamfering place, bottom of foldede flame wall.
4. living beings chain-grate boiler chamber structure as claimed in claim 1, is characterized in that: face arch top is for extension obliquely from front to back, bottom are for vertically extending, and the overfiren air port of face arch is arranged on the vertical extension of face arch.
5. living beings chain-grate boiler chamber structure as claimed in claim 1, is characterized in that: described foldede flame wall is for vertical extension and foldede flame wall bottom is provided with bending part backward.
6. living beings chain-grate boiler chamber structure as claimed in claim 1, is characterized in that: described rear furnace wall is provided with the cleaning door with the 3rd combustion chamber, and the corresponding cleaning door in outside of rear furnace wall arranges shoot door.
7. living beings chain-grate boiler chamber structure as claimed in claim 1, is characterized in that: be provided with bellows on the downside of described first combustion chamber.
CN201420840021.XU 2014-12-26 2014-12-26 Living beings chain-grate boiler chamber structure Expired - Fee Related CN204345616U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201420840021.XU CN204345616U (en) 2014-12-26 2014-12-26 Living beings chain-grate boiler chamber structure

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Application Number Priority Date Filing Date Title
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104566338A (en) * 2014-12-26 2015-04-29 河南农业大学 Hearth structure of biomass chain boiler
CN108644802A (en) * 2018-03-10 2018-10-12 魏银先 Inverse baffling burning smoke chain row's arch

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104566338A (en) * 2014-12-26 2015-04-29 河南农业大学 Hearth structure of biomass chain boiler
CN108644802A (en) * 2018-03-10 2018-10-12 魏银先 Inverse baffling burning smoke chain row's arch

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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: 20150520

Termination date: 20161226