CN104807323A - Tunnel kiln - Google Patents
Tunnel kiln Download PDFInfo
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- CN104807323A CN104807323A CN201410460650.4A CN201410460650A CN104807323A CN 104807323 A CN104807323 A CN 104807323A CN 201410460650 A CN201410460650 A CN 201410460650A CN 104807323 A CN104807323 A CN 104807323A
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Abstract
The invention relates to a tunnel kiln. The tunnel kiln comprises a kiln main body, an ejection type mixer and a high temperature hot wind air flue, wherein the ejection type mixer is designed into the built-in type venturi tube structure; the ejection type mixer is connected with the high temperature hot wind air flue; the kiln main body comprises a pre-heating section, a high temperature section, a quench zone and a slow cooling section orderly connected along the horizontal direction of the kiln main body; the ejection type mixer is connected with the quench zone and is connected with the high temperature section through the high temperature hot wind air flue. A work method of the tunnel kiln is also related. The ejection type mixer having venturi tube structure is added in the tunnel kiln for directly absorbing the high temperature gas in the cooling section of the tunnel kiln and pressing and transporting the gas to a burner in the high temperature section of the tunnel kiln, thus higher hot wind temperature is guaranteed, ejecting speed is improved, sufficient combustion is ensured, energy is saved and environment of producing department is improved.
Description
Technical field
The present invention relates to a kind of tunnel-type kiln.
Background technology
Continous way produce tunnel-type kiln fire product from high temperature section enter quench zone cold after, taking out cold air by cooling blower is injected in quench zone stove by the air nozzle in quench zone both walls, the heat that cold air absorbs high-temperature product cools product, and temperature can reach more than 800 DEG C after the absorption of air product heat sprayed into, this part high temperature air must be discharged in stove, generally has following two kinds of methods to discharge:
1, reduce to be transported to by exhaust fan after temperature and need the place of hot blast through mixing cold wind or be directly discharged to aerial;
2, the combustion air of high temperature section as burner is extracted into blower fan.
Needed for the tunnel-type kiln high temperature section burner that general continous way is produced, combustion air has following three kinds of supply modes:
1, the first be by blower fan take out cold air to be delivered directly in burner by pipeline and with combustion gas mixing after burn, this mode is just burnt with combustion gas mixing because combustion air does not heat, and energy consumption is maximum;
2, the second takes out cold air by blower fan to be driven in the heat exchanger of the metal making being arranged on tunnel-type kiln cooling section, is transported in the burner of high temperature section again burns with combustion gas mixing by heat exchanger after indirectly being absorbed the waste heat of cooling section by metallic conduit.This mode is because of the high temperature resistant restriction of metallic recuperator, the impact of heat exchanger heat exchange efficiency and the heat radiation of conveyance conduit, and temperature when hot blast is transported to burner generally can only below 150 DEG C;
3, the third directly takes out hot blast from cooling section to be transported to by metallic conduit the burner of high temperature section again and to burn with combustion gas mixing.Because considering the cooling requirement of draught fan impeller high-temperature oxydation and distortion, axle and bearing, expensive high temperature resistant stainless steel material must be adopted to make, even if high-temperature hot-air temperature also must be reduced to the long-term normal of less than 500 DEG C guarantee blower fans and run by mixing different substances together cold air by the high-temperature blower adopting expensive high temperature resistant stainless steel (310S) to manufacture, the temperature of adopting when hot blast is in this way transported to burner generally can only below 250 DEG C.In addition, fans load need be increased because high-temperature hot-air volumetric expansion density is little, mix the factors such as the restriction of cold air cooling and conveying fan manufactured materials, slow-speed of revolution high-power blower need be adopted, operating cost and equipment investment are significantly increased;
We know that the combustion air temperature participating in burning is higher, and gas consumption is fewer, more energy-conservation.At present, the temperature utilizing using residual heat from kiln furnace to improve burner combustion air is the target that the technical staff being engaged in Industrial Stoves constantly pursues.
Summary of the invention
Do not heat cause energy consumption large to solve combustion-supporting gas in above-mentioned tunnel-type kiln, heat exchanger heat exchange efficiency is low, the technical problem that the large cost of fans load is high, the invention provides a kind of energy consumption low, energy-efficient tunnel-type kiln, comprise kiln body, injection type blender and high-temperature hot-air air channel, described injection type blender is set to concealed Venturi tubular construction, described injection type blender is connected with high-temperature hot-air air channel setting, described kiln body comprises the preheating section being connected and arranging in the horizontal direction successively, high temperature section, quench zone and slow cooling section, described injection type blender is communicated with described quench zone and is communicated with described high temperature section by described high-temperature hot-air air channel.
According to a preferred embodiment of the invention, described kiln body is by the cuboid-type surrounding through at the bottom of kiln top, both sides Yao Qiang and kiln, and described injection type blender and high-temperature hot-air air channel are arranged on described kiln within the walls.
According to a preferred embodiment of the invention, described injection type blender comprise connect setting successively high pressure positive blower import air channel, high pressure positive blower, high pressure positive blower outlet conduits, shower nozzle, entrance, contraction section, central segment and expanding section.
According to a preferred embodiment of the invention, described injection type blender high pressure positive blower import air channel is communicated with described quench zone, and described expanding section is communicated with described high-temperature hot-air air channel.
According to a preferred embodiment of the invention, described tunnel-type kiln also comprises burner, and described burner one end is communicated with described high-temperature hot-air air channel, and the described burner other end is communicated with described tunnel-type kiln high temperature section, comprises combustible gas in described burner.
According to a preferred embodiment of the invention, described injection type blender is configured such that the flow direction of high-temperature gas in described kiln body is: described high pressure positive blower is by high pressure positive blower import air channel suction high-temperature gas, through the ejection at a high speed at described contraction section place of described shower nozzle, and after described contraction section mixes, enter described central segment and expanding section with the described cooling section high-temperature hot-air that described entrance aspirates, then by described high-temperature hot-air air channel enter burn with combustion gas mixing in described burner after be blown into described high temperature section.
According to a preferred embodiment of the invention, described injection type blender adopts high temperature resistant stainless steel and aluminous refractory to form.
According to a preferred embodiment of the invention, described kiln body adopts refractory brick and ceramic fiber cotton to build by laying bricks or stones.
The present invention also provides a kind of tunnel-type kiln method of work, and the method comprises the steps:
Kiln body, injection type blender and high-temperature hot-air air channel are provided, described kiln body comprise in the horizontal direction connect successively arrange preheating section, high temperature section, quench zone and slow cooling section, described injection type blender is connected with high-temperature hot-air air channel setting, described injection type blender is set to concealed Venturi tubular construction, state injection type blender comprise connect successively arrange high pressure positive blower import air channel, high pressure positive blower, high pressure positive blower outlet conduits, shower nozzle, entrance, contraction section, central segment and expanding section;
Described high pressure positive blower aspirates described quench zone furnace high-temperature gas by high pressure positive blower import air channel;
High-temperature gas flow to described shower nozzle through described high pressure positive blower outlet conduits;
High-temperature gas is sprayed at a high speed at described contraction section by described shower nozzle again, makes described entrance and contraction section form negative pressuren zone, makes high-temperature gas in a large number from sucking-off in quench zone stove;
Shower nozzle ejection high-temperature gas with mix from sucking-off high-temperature gas in quench zone stove after sharply accelerate through described central segment, then slow down through described expanding section, enter described high-temperature hot-air air channel;
There is provided a burner, described burner is arranged in described high temperature section kiln wall, and described high-temperature hot-air air channel is communicated with described burner and described expanding section, comprises combustible gas in described burner;
High-temperature gas is transported in described tunnel oven burner by high-temperature hot-air air channel after the pressurization of injection type blender;
High-temperature gas sprays in high temperature section stove in described burner with after combustible gas mixed combustion.
The present invention sets up the injection type blender of venturi tube structure within the walls by the kiln producing tunnel-type kiln in continous way, direct suction continous way produces the high-temperature gas of kiln quench zone, be transported to by high-temperature hot-air air channel after the pressurization of injection type blender in the burner in continous way production tunnel-type kiln high temperature section, spray in high temperature section stove after burning with combustion gas mixing in the burner.This invention is exactly mainly the combustion air of burner as the burning high-temperature residual heat wind in quench zone stove being directly transported to high temperature section using the shortest distance, this technology is because having increased substantially the temperature of fuel gas buring combustion air, capable of saving fuel, simultaneously because adopting low-power high-voltage blower fan to do power, drastically reduce the area the power consumption of conveying fan, further improve workshop environment.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings, wherein:
Fig. 1 is the horizontal profile structure schematic diagram of a kind of tunnel-type kiln one of the present invention preferred embodiment.
Fig. 2 is the horizontal section structural representation of a kind of tunnel-type kiln one of the present invention preferred embodiment.
Fig. 3 is the regional enlarged drawing of III shown in Fig. 1.
Fig. 4 is the flow chart of steps of a kind of tunnel-type kiln method of work of the present invention.
Detailed description of the invention
Be clearly and completely described to the technical scheme in the embodiment of the present invention below, obviously, described embodiment is only a part of embodiment of the present invention, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making other embodiments all obtained under creative work prerequisite, belong to the scope of protection of the invention.
The invention discloses a kind of tunnel-type kiln, please refer to Fig. 1, Fig. 2 and Fig. 3, Fig. 1 is the horizontal profile structure schematic diagram of a kind of tunnel-type kiln one of the present invention preferred embodiment, Fig. 2 is the horizontal section structural representation of a kind of tunnel-type kiln one of the present invention preferred embodiment, and Fig. 3 is the regional enlarged drawing of III shown in Fig. 1.Described tunnel-type kiln 1 comprises kiln body 11, injection type blender 13 and high-temperature hot-air air channel 15, described injection type blender 13 is set to concealed Venturi tubular construction, described injection type blender 13 is connected with high-temperature hot-air air channel 15 setting, described kiln body 11 comprise successively in the horizontal direction connect arrange preheating section 111, high temperature section 112, quench zone 113 and slow cooling section 114, described injection type blender 13 is communicated with described quench zone 113 and is communicated with described high temperature section 112 by described high-temperature hot-air air channel 15.Described kiln body 11 surrounds the cuboid-type of through by 11 (c) at the bottom of kiln top 11 (a), both sides kiln wall 11 (b) and kiln, and described injection type blender 13 and high-temperature hot-air air channel 15 are arranged in described kiln wall 11 (b).
Described injection type blender 13 comprise connect setting successively high pressure positive blower import air channel 131, high pressure positive blower 132, high pressure positive blower outlet conduits 133, shower nozzle 134, entrance 135, contraction section 136, central segment 137 and expanding section 138.Described injection type blender 13 high pressure positive blower import air channel 131 is communicated with described quench zone 113, and described expanding section 138 is communicated with described high-temperature hot-air air channel 15.
More specifically, described injection type blender 13 adopts high temperature resistant stainless steel and aluminous refractory to form, and described kiln body 11 adopts refractory brick and ceramic fiber cotton to build by laying bricks or stones.
The principle of Venturi effect is then when wind blows over obstacle, and above the lee face of obstacle, near ports air pressure is relatively low, thus produces suction-operated and cause the flowing of air.The principle of Venturi tube is exactly air-flow from the coarse to fine, to accelerate gas flow rate, makes gas form a pressure area at the rear side of venturi outlet.
In the present embodiment, described tunnel-type kiln 1 also comprises burner 17, and described burner 17 one end is communicated with described high-temperature hot-air air channel 15, and described burner 17 other end is communicated with described tunnel-type kiln high temperature section 112, comprises combustible gas in described burner 17.
Described injection type blender 13 is configured such that the flow direction of high-temperature gas in described kiln body 11 is: described high pressure positive blower 132 aspirates high-temperature gas by high pressure positive blower import air channel 131, through the ejection at a high speed at described contraction section 136 place of described shower nozzle 134, and after described contraction section 136 mixes, enter described central segment 137 and expanding section 138 with the described cooling section high-temperature hot-air that described entrance 135 aspirates, then by described high-temperature hot-air air channel 15 enter burn with combustion gas mixing in described burner 17 after be blown into described high temperature section 112.
In the present embodiment, the operation principle of described injection type blender 13 is that described high pressure positive blower 132 aspirates described quench zone 113 furnace high-temperature gas by high pressure positive blower import air channel 131, flow in described shower nozzle 134 through described high pressure positive blower outlet conduits 133, sprayed at a high speed at described contraction section 136 by described shower nozzle 134 again, the high-temperature gas of ejection makes described entrance 135 and contraction section 136 form negative pressuren zone at a high speed, so by high-temperature gas in a large number from sucking-off in quench zone stove, the gas that described shower nozzle 134 sprays with the high-temperature gas from the sucking-off of described quench zone 113 after contraction section mixes, sharply accelerate through described central segment 137 gas, then slow down through described expanding section 138 mist, dynamic pressure is converted to static pressure, namely pressurize, with the conveying of the gas that reaches a high temperature.
The present invention also provides a kind of tunnel-type kiln method of work, refers to Fig. 4, and be the flow chart of steps of a kind of tunnel-type kiln method of work of the present invention, the method comprises the steps:
Step S1, provides kiln body, injection type blender, high-temperature hot-air air channel and burner.
Described kiln body comprise in the horizontal direction connect successively arrange preheating section, high temperature section, quench zone and slow cooling section, described injection type blender is connected with high-temperature hot-air air channel setting, described injection type blender is set to concealed Venturi tubular construction, described injection type blender comprise connect successively arrange high pressure positive blower import air channel, high pressure positive blower, high pressure positive blower outlet conduits, shower nozzle, entrance, contraction section, central segment and expanding section;
Step S2, high-temperature gas flow to described shower nozzle by described high pressure positive blower.
Described high pressure positive blower aspirates described quench zone furnace high-temperature gas by high pressure positive blower import air channel, and high-temperature gas flow to described shower nozzle through described high pressure positive blower outlet conduits;
Step S3, high-temperature gas enters described high-temperature hot-air air channel by injection type blender.
High-temperature gas is sprayed at a high speed through described contraction section by described shower nozzle again, make described entrance and contraction section form negative pressuren zone, make high-temperature gas in a large number from sucking-off in quench zone stove, high-temperature gas sharply accelerates through described central segment, then slow down through described expanding section, enter described high-temperature hot-air air channel;
Step S4, high-temperature gas enters burner.
Described burner is arranged in described high temperature section kiln wall, described high-temperature hot-air air channel is communicated with described burner and described expanding section, comprise combustible gas in described burner, high-temperature gas is transported in described tunnel oven burner by high-temperature hot-air air channel after the pressurization of injection type blender;
Step S5, high-temperature gas sprays in high temperature section stove in described burner with after combustible gas mixed combustion.
Enter from preheating section when firing product, progressively enter high temperature section calcination (general temperature is more than 1100 DEG C) after heating, then quench zone cooling products is entered, cold air is taken out by cooling blower, be injected in quench zone stove by the air nozzle in quench zone both walls, the heat that cold air absorbs high-temperature product cools product, and after the absorption of air product heat sprayed into, temperature can reach more than 800 DEG C, and this part high temperature air must be discharged in stove.The cold air spraying into cooling section is absorbed the high-temperature hot-air that the thermal temperature of product reaches more than 800 DEG C aspirate and be transported to a kind of new technology of the section of burning till as burner combustion combustion air by the present invention, produce in described continous way in the both walls of tunnel oven furnace body and arrange injection type blender and high-temperature hot-air air channel respectively, described injection type blender is concealed Venturi tubular construction.Described injection type blender one end is communicated with in described cooling section stove, and the other end is communicated with high-temperature hot-air air channel, and high-temperature hot-air air channel is communicated with all burners in the both walls of tunnel oven furnace body high temperature section respectively.
The present invention sets up the injection type blender of venturi tube structure within the walls by the kiln producing tunnel-type kiln in continous way, direct suction continous way produces the high-temperature hot-air (more than 800 DEG C) of kiln quench zone, be transported to by high-temperature hot-air air channel after the pressurization of injection type blender in the burner in continous way production tunnel-type kiln high temperature section, spray in high temperature section stove after burning with combustion gas mixing in the burner.This invention is exactly mainly the combustion air of burner as burning by new technology, the high-temperature residual heat wind in quench zone stove being directly transported to high temperature section using the shortest distance, this technology is because having increased substantially the temperature (can reach more than 500 DEG C) of fuel gas buring combustion air, capable of saving fuel more than 15%.
Compared to prior art, the present invention sets up the injection type blender of venturi tube structure within the walls by the kiln producing tunnel-type kiln in continous way, direct suction continous way produces the high-temperature gas of kiln quench zone, be transported to by high-temperature hot-air air channel after the pressurization of injection type blender in the burner in continous way production tunnel-type kiln high temperature section, spray in high temperature section stove after burning with combustion gas mixing in the burner.This invention is exactly mainly the combustion air of burner as the burning high-temperature residual heat wind in quench zone stove being directly transported to high temperature section using the shortest distance, this technology is because having increased substantially the temperature of fuel gas buring combustion air, capable of saving fuel, simultaneously because adopting low-power high-voltage blower fan to do power, drastically reduce the area the power consumption of conveying fan, further improve workshop environment.
The foregoing is only embodiments of the invention; not thereby the scope of the claims of the present invention is limited; every utilize description of the present invention to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical field, be all in like manner included in scope of patent protection of the present invention.
Claims (9)
1. a tunnel-type kiln, it is characterized in that, comprise kiln body, injection type blender and high-temperature hot-air air channel, described injection type blender is set to concealed Venturi tubular construction, described injection type blender is connected with high-temperature hot-air air channel setting, described kiln body comprise successively be in the horizontal direction connected arrange preheating section, high temperature section, quench zone and slow cooling section, described injection type blender is communicated with described quench zone and is communicated with described high temperature section by described high-temperature hot-air air channel.
2. tunnel-type kiln according to claim 1, is characterized in that, described kiln body is by the cuboid-type surrounding through at the bottom of kiln top, both sides Yao Qiang and kiln, and described injection type blender and high-temperature hot-air air channel are arranged on described kiln within the walls.
3. tunnel-type kiln according to claim 1, it is characterized in that, described injection type blender comprise connect setting successively high pressure positive blower import air channel, high pressure positive blower, high pressure positive blower outlet conduits, shower nozzle, entrance, contraction section, central segment and expanding section.
4. tunnel-type kiln according to claim 3, is characterized in that, described injection type blender high pressure positive blower import air channel is communicated with described quench zone, and described expanding section is communicated with described high-temperature hot-air air channel.
5. tunnel-type kiln according to claim 1, it is characterized in that, described tunnel-type kiln also comprises burner, and described burner one end is communicated with described high-temperature hot-air air channel, the described burner other end is communicated with described tunnel-type kiln high temperature section, comprises combustible gas in described burner.
6. tunnel-type kiln according to claim 5, it is characterized in that, described injection type blender is configured such that the flow direction of high-temperature gas in described kiln body is: described high pressure positive blower is by high pressure positive blower import air channel suction high-temperature gas, through the ejection at a high speed at described contraction section place of described shower nozzle, and after described contraction section mixes, enter described central segment and expanding section with the described cooling section high-temperature hot-air that described entrance aspirates, then by described high-temperature hot-air air channel enter burn with combustion gas mixing in described burner after be blown into described high temperature section.
7. tunnel-type kiln according to claim 1, is characterized in that, described injection type blender adopts high temperature resistant stainless steel and aluminous refractory to form.
8. tunnel-type kiln according to claim 1, is characterized in that, described kiln body adopts refractory brick and ceramic fiber cotton to build by laying bricks or stones.
9. a tunnel-type kiln method of work, is characterized in that, the method comprises the steps:
Kiln body, injection type blender and high-temperature hot-air air channel are provided, described kiln body comprise in the horizontal direction connect successively arrange preheating section, high temperature section, quench zone and slow cooling section, described injection type blender is connected with high-temperature hot-air air channel setting, described injection type blender is set to concealed Venturi tubular construction, described injection type blender comprise connect successively arrange high pressure positive blower import air channel, high pressure positive blower, high pressure positive blower outlet conduits, shower nozzle, entrance, contraction section, central segment and expanding section;
Described high pressure positive blower aspirates described quench zone furnace high-temperature gas by high pressure positive blower import air channel;
High-temperature gas flow to described shower nozzle through described high pressure positive blower outlet conduits;
High-temperature gas is sprayed at a high speed through described contraction section by described shower nozzle more again, makes described entrance and contraction section form negative pressuren zone, makes high-temperature gas in a large number from sucking-off in quench zone stove;
Shower nozzle ejection high-temperature gas with mix from sucking-off high-temperature gas in quench zone stove after sharply accelerate through described central segment, then slow down through described expanding section, enter described high-temperature hot-air air channel;
There is provided a burner, described burner is arranged in described high temperature section kiln wall, and described high-temperature hot-air air channel is communicated with described burner and described expanding section, comprises combustible gas in described burner;
High-temperature gas is transported in described tunnel oven burner by high-temperature hot-air air channel after the pressurization of injection type blender;
High-temperature gas sprays in high temperature section stove in described burner with after combustible gas mixed combustion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410460650.4A CN104807323A (en) | 2014-09-11 | 2014-09-11 | Tunnel kiln |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410460650.4A CN104807323A (en) | 2014-09-11 | 2014-09-11 | Tunnel kiln |
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| Publication Number | Publication Date |
|---|---|
| CN104807323A true CN104807323A (en) | 2015-07-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410460650.4A Pending CN104807323A (en) | 2014-09-11 | 2014-09-11 | Tunnel kiln |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110715307A (en) * | 2019-10-31 | 2020-01-21 | 浙江浙能技术研究院有限公司 | Device for treating industrial acidic waste gas by using pulverized coal fired boiler with four tangential corners |
-
2014
- 2014-09-11 CN CN201410460650.4A patent/CN104807323A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110715307A (en) * | 2019-10-31 | 2020-01-21 | 浙江浙能技术研究院有限公司 | Device for treating industrial acidic waste gas by using pulverized coal fired boiler with four tangential corners |
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Application publication date: 20150729 |
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