CN202040835U - Biomass hot water boiler and hearth thereof - Google Patents
Biomass hot water boiler and hearth thereof Download PDFInfo
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- CN202040835U CN202040835U CN 201120074552 CN201120074552U CN202040835U CN 202040835 U CN202040835 U CN 202040835U CN 201120074552 CN201120074552 CN 201120074552 CN 201120074552 U CN201120074552 U CN 201120074552U CN 202040835 U CN202040835 U CN 202040835U
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- burner hearth
- hearth
- rear arch
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Abstract
A biomass hot water boiler comprises a boiler body internally provided with a hearth and is characterized in that the hearth adopts a structure of which the middle part has large volume and the two ends are shrunk; the horizontal section of the hearth is square; a hearth wall comprises an inclined front arch and a rear arch; a smoke outlet with a throat is arranged at the top of the hearth; a secondary air tube and a tertiary air tube are arranged on the hearth at the upper part of the front arch; the height h1 of the front arch is 1.5-2 times of the height h2 of the rear arch; for the arrangement form of the rear arch, the outlet part of the rear arch is designed into a downwards inclined or horizontal shape; and the scope of the inclination angle A of the rear arch is 8 DEG to 12 DEG. The hearth of the biomass hot water boiler improves the combustion efficiency, and solves the problems that the biomass boiler is insufficient in combustion and poor in inflaming property.
Description
Technical field
The utility model relates to a kind of burner hearth of biomass thermal homogeneous solution-type reactor, belongs to biomass energy and field of energy-saving technology.
Background technology
But with the biomass straw is biomass boiler full substitution timber, coal, the oil and natural gas of fuel, have characteristics such as efficient, environmental protection, energy-conservation and fuel reproducible utilization, support to have vast market prospect under the background of Renewable Energy Development in country energetically.Than the employed bunker coal of traditional coal-burning boiler, biomass fuel has characteristics such as volatile matter content height, fixed carbon content is low, ash fusion point is low.At present, the biomass boiler kind is a lot, and small-sized biomass boiler major part adopts the cylinder type chamber structure, can have the problem of the following aspects when using.At first be that the thermal efficiency is low, Fuel Consumption is high, the biomass boiler ubiquity flammable volatile matter gas uncombusted loss and the bigger situation of fixed carbon uncombusted loss proportion, cause boiler efficiency lower, increased the consumption of fuel in the calorific requirement obtaining, having wasted fuel has increased spending.Next is that fuel combustion is insufficient, the phenomenon of smoldering can't be solved at all, after biomass fuel enters boiler, the volatile matter that is contained in the fuel is by fast pyrogenation, will not produce the phenomenon of smoldering if there is this moment the air of q.s to participate in burning, the problem that the solution boiler is smoldered need be resolved the dispensing problem of air.Moreover the biomass fuel ignition condition is poor, causes catching fire in the stove reaching ideal effect.
Summary of the invention
The purpose of this utility model is to provide a kind of can increase efficiency of combustion, solves the burner hearth of the biomass thermal homogeneous solution-type reactor of the insufficient and problems such as difference of catching fire of biomass boiler burning.
For achieving the above object, the utility model adopts following technical scheme: a kind of burner hearth, it is characterized in that the structure that described burner hearth adopts the big two ends of volume, middle part to dwindle, the burner hearth horizontal cross-section is square, hearth wall comprises the face arch and the rear arch of inclination, roof of the furnace is provided with the exhanst gas outlet that has reducing, and the burner hearth on face arch top is provided with secondary air channel and tertiary-air pipe.The scope of rear arch inclination angle A is 8 ° ~ 12 °.
The concrete characteristics of this programme also have, and provide better ignition condition at the face arch place, preceding pitch of arch h in order to reach radiation and convection current
1Back ,=(1.5 ~ 2) pitch of arch h
2Preceding pitch of arch h1 is 240mm, and back pitch of arch h2 is 130mm,
On the arrangement form of rear arch, the exit portion of rear arch is designed to have a down dip or the shape of level, this rear arch form can effectively be impelled high-temperature flue gas to flow to the face arch bottom to flow, increased the radiation and the convection heat transfer' heat-transfer by convection process of face arch.Rear arch inclination angle A is 10.5 °.
The direction of secondary air channel is horizontally disposed and becomes 30 ° of angles with hearth wall.
Tertiary-air pipe is arranged at the secondary air channel top, and vertical range is 200mm, horizontally disposed and and hearth wall
Become 30 ° of angles.The utility model has increased secondary wind and tertiary air in burner hearth inside.Increased secondary wind in preceding domed end, the introducing of secondary wind has greatly strengthened the combustion efficiency of fuel.On the furnace wall of both sides, burner hearth chamber, increased the horizontal direction air intake and become 60 ° of angles and the identical tertiary air of direction with the furnace wall normal plane, its effect is further to strengthen the disturbance of air-flow in the burner hearth and mix, increase the uncombusted time of staying of particle in burner hearth, impelling in the flue gas is the abundant burning of after-flame gas and solid particle.Tertiary air quantity is controlled at 10% ~ 15% of total blast volume usually.Secondary wind and tertiary air air quantity are 50% ~ 60% of total intake.
A kind of biomass thermal homogeneous solution-type reactor, it comprises the body of heater of built-in burner hearth, it is characterized in that the structure that described burner hearth adopts the big two ends of volume, middle part to dwindle, the burner hearth horizontal cross-section is square, hearth wall comprises the face arch and the rear arch of inclination, roof of the furnace is provided with the exhanst gas outlet that has reducing, and the burner hearth on face arch top is provided with secondary air channel and tertiary-air pipe; Preceding pitch of arch h1=(1.5 ~ 2) back pitch of arch h2; On the arrangement form of rear arch, the exit portion of rear arch is designed to have a down dip or the shape of level; The scope of rear arch inclination angle A is 8 ° ~ 12 °.
The concrete characteristics of this programme are set side by side with feed bin with described body of heater in addition, also are provided with furnace base below body of heater and feed bin, and traveling-grate stoker and a wind inlet are set in the inside of furnace base; One time wind inlet comprises three air inlets that are evenly arranged in the traveling-grate stoker centre; Preceding pitch of arch h1 is 240mm, and back pitch of arch h2 is 130mm, and rear arch inclination angle A is 10.5 °; The direction of secondary air channel is horizontally disposed and becomes 30 ° of angles with hearth wall; Tertiary-air pipe is arranged at secondary air channel top, and vertical range is 200mm, and is horizontally disposed and become 30 ° of angles with hearth wall.
The beneficial effects of the utility model are the structure that burner hearth adopts the big two ends of volume, middle part to dwindle.Middle big volume can impel solid particle contained in the flue gas to fall back on the fire grate under the gravity effect, reduces the dust stratification in the rear heat exchange tubes.For making hot flue gas form the air-flow of strong rotation at the furnace outlet place, strengthen the heat exchange effect of flue gas in rear heat exchange tubes, the boiler furnace top exit has adopted the reducing processing, as shown in Figure 1.Use the thermal efficiency of the small-sized normal-pressure hot-water boiler of this burner hearth can reach 85%, the fuel fire burning rapidly, the fuel fire area increases in the burner hearth, and reduced the amount of dust that enters boiler rear portion heat exchanger effectively, reduce the corrosion that is produced because of the living beings ash, increased the service life of boiler.The utility model capacity of can be applicable to is not more than the biomass thermal homogeneous solution-type reactor of 1t/h.
Description of drawings
Fig. 1 is a structural representation of the present utility model.Fig. 2 burner hearth horizontal sectional view.
Among the figure: 1-body of heater; 2-feed bin; 3-furnace base; 4-wind inlet; 5-traveling-grate stoker; 6-face arch; 7-tertiary-air pipe; The 8-hearth wall; 9-secondary air channel; 10-rear arch; A-rear arch inclination angle; H1-preceding the pitch of arch; H2-back the pitch of arch.
The specific embodiment
Below in conjunction with Fig. 1 and Fig. 2 the utility model is set forth.It is a kind of biomass molding fuel chain grate boiler, body of heater 1 inside is the burner hearth 8 that the utility model is set forth, burner hearth 8 horizontal cross-sections are square, furnace base 3 is positioned at feed bin 2 and body of heater 1 bottom, inside is provided with traveling-grate stoker 5 and a wind inlet 4, a wind inlet 4 has three air inlets in the middle of being evenly arranged in traveling-grate stoker 5, feed bin 2 is arranged in parallel with body of heater 1, burner hearth 8 is mainly by face arch 6, rear arch 10, structures such as secondary air channel 9 and tertiary-air pipe 7 are formed, chimney arch is divided into face arch 6 and rear arch 10,6 pairs of fresh fuels of face arch carry out preheating, and promote that fresh fuel burns rapidly.The main effect of rear arch 10 is that heat delivery that a large amount of high-temperature flue gas and red-hot coke are produced is to main combustion zone and area in preparation, to keep high temperature there, the formed high temperature in active combustion district at rear arch 10 middle parts and rear arch 10 insulation effects to burning-out zone own, all the after-flame to fire grate afterbody carbon residue plays facilitation.Preceding in this example pitch of arch h1 is 240mm, back pitch of arch h2 is 130mm, rear arch inclination angle A is 10.5 °, secondary air channel 9 is positioned at 100mm place, face arch top, direction is horizontally disposed and become 30 ° of angles with hearth wall, tertiary-air pipe 7 is 200mm with the secondary air channel vertical range, and is horizontally disposed and become 30 ° of angles with hearth wall, as Fig. 2.Roof of the furnace is provided with reducing and links to each other with rear heat exchange tubes.Obtaining the boiler positive balance thermal efficiency through test is 85.08%.
Claims (9)
1. burner hearth, it is characterized in that the structure that described burner hearth adopts the big two ends of volume, middle part to dwindle, the burner hearth horizontal cross-section is square, hearth wall comprises the face arch and the rear arch of inclination, roof of the furnace is provided with the exhanst gas outlet that has reducing, the burner hearth on face arch top is provided with secondary air channel and tertiary-air pipe, and the scope of rear arch inclination angle A is 8 ° ~ 12 °.
2. burner hearth according to claim 1 is characterized in that described preceding pitch of arch h
1Pitch of arch h after equaling 1.5 ~ 2 times
2
3. burner hearth according to claim 2, pitch of arch h1 is 240mm before it is characterized in that, back pitch of arch h2 is 130mm.
4. burner hearth according to claim 1 is characterized in that on the arrangement form of rear arch, the exit portion of rear arch is designed to have a down dip or the shape of level.
5. burner hearth according to claim 1 is characterized in that rear arch inclination angle A is 10.5 °.
6. burner hearth according to claim 1, the direction that it is characterized in that secondary air channel are horizontally disposed and become 30 ° of angles with hearth wall.
7. burner hearth according to claim 1 is characterized in that tertiary-air pipe is arranged at the secondary air channel top, hangs down
Straight distance is 200mm, and is horizontally disposed and become 30 ° of angles with hearth wall.
8. biomass thermal homogeneous solution-type reactor, it comprises the body of heater of built-in burner hearth, it is characterized in that the structure that described burner hearth adopts the big two ends of volume, middle part to dwindle, the burner hearth horizontal cross-section is square, hearth wall comprises the face arch and the rear arch of inclination, roof of the furnace is provided with the exhanst gas outlet that has reducing, and the burner hearth on face arch top is provided with secondary air channel and tertiary-air pipe; Pitch of arch h2 after preceding pitch of arch h1 equals 1.5 ~ 2 times; On the arrangement form of rear arch, the exit portion of rear arch is designed to have a down dip or the shape of level; The scope of rear arch inclination angle A is 8 ° ~ 12 °.
9. biomass thermal homogeneous solution-type reactor according to claim 8 is characterized in that being set side by side with feed bin with described body of heater, also is provided with furnace base below body of heater and feed bin, and traveling-grate stoker and a wind inlet are set in the inside of furnace base; One time wind inlet comprises three air inlets that are evenly arranged in the traveling-grate stoker centre; Preceding pitch of arch h1 is 240mm, and back pitch of arch h2 is 130mm, and rear arch inclination angle A is 10.5 °; The direction of secondary air channel is horizontally disposed and becomes 30 ° of angles with hearth wall; Tertiary-air pipe is arranged at secondary air channel top, and vertical range is 200mm, and is horizontally disposed and become 30 ° of angles with hearth wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120074552 CN202040835U (en) | 2011-03-21 | 2011-03-21 | Biomass hot water boiler and hearth thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120074552 CN202040835U (en) | 2011-03-21 | 2011-03-21 | Biomass hot water boiler and hearth thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202040835U true CN202040835U (en) | 2011-11-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120074552 Expired - Fee Related CN202040835U (en) | 2011-03-21 | 2011-03-21 | Biomass hot water boiler and hearth thereof |
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| CN (1) | CN202040835U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105485712A (en) * | 2016-01-13 | 2016-04-13 | 北京一亚高科能源科技有限公司 | Heat conduction oil boiler |
| CN107155730A (en) * | 2017-06-02 | 2017-09-15 | 清华大学 | Intelligent greenhouse system |
| CN107289443A (en) * | 2017-06-02 | 2017-10-24 | 清华大学 | Heating system for greenhouse |
-
2011
- 2011-03-21 CN CN 201120074552 patent/CN202040835U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105485712A (en) * | 2016-01-13 | 2016-04-13 | 北京一亚高科能源科技有限公司 | Heat conduction oil boiler |
| CN107155730A (en) * | 2017-06-02 | 2017-09-15 | 清华大学 | Intelligent greenhouse system |
| CN107289443A (en) * | 2017-06-02 | 2017-10-24 | 清华大学 | Heating system for greenhouse |
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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 |
Granted publication date: 20111116 Termination date: 20190321 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |