CN101846447A - Down draft kiln - Google Patents
Down draft kiln Download PDFInfo
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- CN101846447A CN101846447A CN 201010206297 CN201010206297A CN101846447A CN 101846447 A CN101846447 A CN 101846447A CN 201010206297 CN201010206297 CN 201010206297 CN 201010206297 A CN201010206297 A CN 201010206297A CN 101846447 A CN101846447 A CN 101846447A
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- flue gas
- air
- kiln
- heater
- fuel nozzle
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Abstract
The invention relates to a down draft kiln, consisting of a furnace body (2), a furnace door (1), a fuel nozzle (3), a hearth (22) and smoke and air exit and entrance (5). The down draft kiln is characterized in that the furnace body (2) consists of a refractory brick layer (6), a thermal protective coating (7), an insulating layer (8) and a shell (9). The smoke and air exit and entrance (5) are arranged at the two sides of the bottom of the furnace body (1) and are internally provided with heat accumulators (10), and the fuel nozzle (3) is arranged above the smoke and air exit and entrance (5) and at the lower part of the furnace body (2). A fire absorbing hole (11) is positioned in the hearth (22) and between the smoke and air exist and entrance (5) and the fuel nozzle (3), a retaining wall (12) is arranged below the fire absorbing hole (11) to divide the smoke and air exist and entrance (5) at the two sides into two parts, and the top of the furnace body (2) is provided with a temperature measuring hole (4). The invention has the advantages of energy source saving, high heat utilization rate and environment protection.
Description
Technical field
The present invention relates to a kind of down-draft kiln.
Background technology
The tradition down-draft kiln is a kind of step kiln.Its title is to be obtained by the flame mobility status.The flame that burning is produced all goes upward to the kiln top from the bocca of combustion chamber, because the kiln top seals, flame can not continue up, under the situation of being driven into a corner, just pulled to descendingly,, at the bottom of kiln, inhale fire hole and advance branch flue through the gap of bung by the draft of chimney, flue collector is discharged by chimney at last.Because hot gas severe is light, above always floating over, so people are accustomed to flame called from top to bottom " suitable ".And the flame that flows is from top to bottom called " falling ", the origin of address that Here it is " down-draft kiln "! Existing down-draft kiln is widely used in industries such as pottery, refractory material, electronic material, metallurgy, and its major defect is that fuel consumption is big; The thermal efficiency is low; Production scale is little; Working condition is poor; The mechanization level is low; Operation control difficulty; Production efficiency is low; Environmental-protecting performance is poor.In order to improve the heat utilization efficiency of down-draft kiln, energy savings is protected environment, is necessary kiln is improved.The structure of general kiln is: comprise body of heater, be provided with burner hearth in body of heater, around burner hearth fire brick layer is arranged, body of heater has shell outward, and refractory brick plays protection, stops that heat distributes outside stove in the body of heater, the heat in the body of heater can be blocked in the body of heater.But the high-temperature flue gas that burning produces is directly discharged, and takes away a lot of heats.This promptly wastes energy, and has polluted environment again.We have invented the heat that a kind of down-draft kiln of new structure utilizes flue gas to take away, and improve the thermal efficiency of kiln, thereby reduce the consumption of the energy, reach energy-conservation and purpose environmental protection.
Summary of the invention
The objective of the invention is to overcome the low deficiency of the thermal efficiency, a kind of saving energy is provided, heat utilization efficiency height, the down-draft kiln of protection environment.
The object of the present invention is achieved like this: it is by body of heater, fire door, fuel nozzle ports, burner hearth and exhanst gas outlet are formed, it is characterized in that body of heater is by fire brick layer, thermal insulation layer, heat-insulation layer and shell are formed, and in the bottom of furnace body both sides flue gas air ports are arranged, be provided with heat storage in the flue gas air ports,, on the flue gas air ports, and be positioned at the body of heater bottom and be provided with fuel nozzle ports, between flue gas air ports and the fuel nozzle ports, and being positioned at burner hearth has the suction fire hole, and the barricade below the suction fire hole has thermometer hole with the flue gas air ports separated into two parts of both sides at the top of body of heater.
When using down-draft kiln of the present invention, the material of packing in the burner hearth, when adding thermal material, two half periods before and after dividing, the preceding half period is when the burner operation in left side, normal temperature air is entered by left flue gas air ports, after the heating of left side heat storage, form high temperature air and enter in the burner hearth, mixes in burner hearth with the fuel that sprays at a high speed and burn, the high-temperature flue gas of generation enters the right side heat storage bottom the right side, heat storage absorbs heat, flue gas is cooled to about 150 ℃, comes out from right flue gas air ports, discharges through the flue collector chimney; The later half cycle is that normal temperature air is entered by rightabout, heat storage is heated as high temperature air through the right side, mix in burner hearth with fuel that the right side burner sprays into and burn, after the high-temperature flue gas stream that produces enters the left side heat storage through left bottom, become low-temperature flue gas, discharge through the flue collector chimney, finish one-period like this.Then, more than the repetition, thereby continuously produce personal high temperature air, make system stable operation.
The present invention compared with prior art has following beneficial effect:
1, calcining heat height can reach 1800 ℃.
2, kiln temperature equilibrium.
The present invention adopts HTAC, realizes hypoxic atmosphere burning in the stove, and the flame volume is multiplied, uniformity of temperature profile in the stove.
3, the constant product quality of Sheng Chaning.
4, energy-efficient
Adopt the high-efficiency heat-accumulating flue gas waste heat recovery apparatus, the limit reclaims smoke discharging residual heat.Flue gas waste heat recovery efficient surpasses 80%; The furnace flame volume enlarges at double, and mean temperature raises, and heat exchange further strengthens, and heat utilization efficiency is improved, and generally can realize energy-conservation more than 30%.
5, pollutant discharge amount reduces
Owing to organize the change fully of combustion system, make burning usually under the oxygen deprivation condition (oxygen concentration is below 5% in the combustion air) carry out, avoided NO
XThe a large amount of generation (can be controlled in 100 * 10
-6Below).Simultaneously, since energy-efficient, fuel consumption reduced, also just mean CO
2The minimizing of gas emissions, environment be improved significantly.
Description of drawings
The present invention is further described below in conjunction with drawings and Examples.
Fig. 1 is the front view of kiln of the present invention.
Fig. 2 is the left view of kiln of the present invention.
Fig. 3 is the vertical view of kiln of the present invention.
Fig. 4 is the A-A view of kiln of the present invention.
Fig. 5 is the work schematic diagram of kiln of the present invention.
As shown in the figure: 1. fire door, 2. body of heater, 3. fuel nozzle ports, 4. thermometer hole, 5. flue gas air ports.6. fire brick layer, 7. thermal insulation layer, 8. heat-insulation layer, 9. shell, 10. heat storage, 11. inhale fire holes, 12. barricades, 13. pipelines, 14. check-valves, 15. ball valves, 16. vaporizers, 17. liquefied gas, 18. air blasts, 19. cross valves, 20. air-introduced machines, 21. chimneys, 22. burner hearths
The specific embodiment
Embodiment 1
Body of heater 2 is by fire brick layer 6, thermal insulation layer 7, heat-insulation layer 8 and shell 9 are formed, and in body of heater 1 two bottom sides flue gas air ports 5 are arranged, and are provided with heat storage 10 in the flue gas air ports 5, on flue gas air ports 5, and be positioned at body of heater 2 bottoms and be provided with fuel nozzle ports 3, between flue gas air ports 5 and the fuel nozzle ports 3, and be positioned at burner hearth 22 and have and inhale fire hole 11, inhale have below the fire hole 11 barricade 12 with both sides flue gas air ports 5 separated into two parts are arranged, at the top of body of heater 2 thermometer hole 4 is arranged.
This kiln has adopted advanced HTAC that traditional down-draft kiln is improved, traditional down-draft kiln flue collector is isolated along center line, 5 places are provided with heat storage at exhanst gas outlet (air intlet), carry out the absorption and the preheating of air of flue gas heat, improve the thermal efficiency of kiln.
When using kiln of the present invention, the material of packing in the burner hearth 22 when adding thermal material, divides former and later two half periods.Before half period work schematic diagram as shown in Figure 5, the course of work of this kiln is: the material of packing in the kiln, when material heat, air blast 18 blasted cold air, cold air enters right side heat storage 10 absorption heats by cross valve 19, and becomes hot-air.Because the effect of barricade 12, hot-air by bottom flue, enter burner hearth 22 through inhaling fire hole 11, with the fuel that sprays into from the right side fuel nozzle ports 3 generation combustion reaction of meeting, emit a large amount of heat, produce hot flue gas, thereby add thermal material.The flow direction of high-temperature flue gas in stove as shown in Figure 5.The final high temperature flue gas enters left side heat storage 10 through the suction fire hole 11 in left side.Heat storage absorption this moment heat is heated, and the temperature of flue gas then reduces.Flue gas by cross valve 19, is discharged from chimney 21 under the effect of air-introduced machine 20.After the cross valve commutation, cold air enters the heat storage in left side the other way around under the effect of air blast 18, the heat transferred cold air that the heat storage 10 in left side absorbs last process, and heat storage is cooled, more than the air preheat to 1000 ℃.Hot-air after the preheating is inhaled fire hole 11 through the left side and is entered burner hearth 22, and the fuel generation combustion reaction with the fuel nozzle ports 3 in left side sprays into produces big calorimetric flue gas.Hot flue gas flowing in burner hearth is opposite with last process, and hot flue gas is through the heat storage 10 on right side, and right side heat storage 10 absorbs a large amount of heats and is heated, and through chimney 21 discharges, so far finish at last by one-period for hot flue gas.As time goes on, cross valve constantly commutates, and work is carried out in fuel nozzle ports 3 exchanges of the left and right sides, the process above repeating, thus continuously produce personal high temperature air, make system stable operation.
Claims (1)
1. down-draft kiln, it is by body of heater (2), fire door (1), fuel nozzle ports (3), burner hearth (22) and smoke entrance (5) are formed, it is characterized in that body of heater (2) is by fire brick layer (6), thermal insulation layer (7), heat-insulation layer (8) and shell (9) are formed, in body of heater (1) two bottom sides flue gas air ports (5) is arranged, be provided with heat storage (10) in the flue gas air ports (5), on flue gas air ports (5), and be positioned at body of heater (2) bottom and be provided with fuel nozzle ports (3), between flue gas air ports (5) and fuel nozzle ports (3), and being positioned at burner hearth (22) has suction fire hole (11), inhale fire hole (11) below have barricade (12) with both sides flue gas air ports (5) separated into two parts arranged, at the top of body of heater (2) thermometer hole (4) is arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010206297 CN101846447A (en) | 2010-06-19 | 2010-06-19 | Down draft kiln |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010206297 CN101846447A (en) | 2010-06-19 | 2010-06-19 | Down draft kiln |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101846447A true CN101846447A (en) | 2010-09-29 |
Family
ID=42771153
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010206297 Pending CN101846447A (en) | 2010-06-19 | 2010-06-19 | Down draft kiln |
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| Country | Link |
|---|---|
| CN (1) | CN101846447A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103245200A (en) * | 2013-06-05 | 2013-08-14 | 张青选 | Gas kiln provided with radiation pipeline device |
| CN104880091A (en) * | 2015-06-03 | 2015-09-02 | 贵阳白云云雾铝矾土煅烧加工厂 | Novel energy-saving environment-friendly annular kiln |
| CN107192265A (en) * | 2017-07-03 | 2017-09-22 | 陶朴科技（上海）有限公司 | Small-sized downward flame smokeless firewood firing |
| CN110806101A (en) * | 2019-10-22 | 2020-02-18 | 佛山市瑞陶窑炉有限公司 | Energy-saving foamed ceramic roller kiln |
| CN115477461A (en) * | 2022-08-19 | 2022-12-16 | 中国建材国际工程集团有限公司 | Glass kiln structure without reversing |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200946979Y (en) * | 2006-04-30 | 2007-09-12 | 黄润 | Novel furnace |
| CN201000270Y (en) * | 2007-01-12 | 2008-01-02 | 河北理工大学 | Front spraying and rear pulling type liquid gas down draught kiln |
| CN201412850Y (en) * | 2009-03-24 | 2010-02-24 | 胡和平 | Fuel gas nozzle and burner employing same |
| CN201434588Y (en) * | 2009-05-26 | 2010-03-31 | 中国轻工业陶瓷研究所 | Ceramic shuttle-type kiln adopting high-temperature air combustion technology |
-
2010
- 2010-06-19 CN CN 201010206297 patent/CN101846447A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200946979Y (en) * | 2006-04-30 | 2007-09-12 | 黄润 | Novel furnace |
| CN201000270Y (en) * | 2007-01-12 | 2008-01-02 | 河北理工大学 | Front spraying and rear pulling type liquid gas down draught kiln |
| CN201412850Y (en) * | 2009-03-24 | 2010-02-24 | 胡和平 | Fuel gas nozzle and burner employing same |
| CN201434588Y (en) * | 2009-05-26 | 2010-03-31 | 中国轻工业陶瓷研究所 | Ceramic shuttle-type kiln adopting high-temperature air combustion technology |
Non-Patent Citations (1)
| Title |
|---|
| 《电瓷生产热工设备》 198905 杜海清 倒焰窑 第192-199页 , 1 * |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103245200A (en) * | 2013-06-05 | 2013-08-14 | 张青选 | Gas kiln provided with radiation pipeline device |
| CN104880091A (en) * | 2015-06-03 | 2015-09-02 | 贵阳白云云雾铝矾土煅烧加工厂 | Novel energy-saving environment-friendly annular kiln |
| CN107192265A (en) * | 2017-07-03 | 2017-09-22 | 陶朴科技（上海）有限公司 | Small-sized downward flame smokeless firewood firing |
| CN110806101A (en) * | 2019-10-22 | 2020-02-18 | 佛山市瑞陶窑炉有限公司 | Energy-saving foamed ceramic roller kiln |
| CN115477461A (en) * | 2022-08-19 | 2022-12-16 | 中国建材国际工程集团有限公司 | Glass kiln structure without reversing |
| CN115477461B (en) * | 2022-08-19 | 2024-01-26 | 中国建材国际工程集团有限公司 | Reversing-free glass kiln structure |
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Open date: 20100929 |