CN103033062A - Waste heat utilization device for gas shuttle kiln - Google Patents
Waste heat utilization device for gas shuttle kiln Download PDFInfo
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- CN103033062A CN103033062A CN2012105275656A CN201210527565A CN103033062A CN 103033062 A CN103033062 A CN 103033062A CN 2012105275656 A CN2012105275656 A CN 2012105275656A CN 201210527565 A CN201210527565 A CN 201210527565A CN 103033062 A CN103033062 A CN 103033062A
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- heat
- hot
- chimney
- exchanger rig
- heat exchange
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- 239000007789 gas Substances 0.000 title abstract description 12
- 239000002918 waste heat Substances 0.000 title abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 29
- 238000010438 heat treatment Methods 0.000 claims description 17
- 239000000567 combustion gas Substances 0.000 claims description 15
- 230000008676 import Effects 0.000 claims description 6
- 239000000498 cooling water Substances 0.000 claims description 3
- 239000003546 flue gas Substances 0.000 abstract description 13
- 101100194816 Caenorhabditis elegans rig-3 gene Proteins 0.000 description 10
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 10
- 239000000446 fuel Substances 0.000 description 8
- 229910000831 Steel Inorganic materials 0.000 description 6
- 239000000919 ceramic Substances 0.000 description 6
- 239000012530 fluid Substances 0.000 description 6
- 239000010959 steel Substances 0.000 description 6
- 238000001816 cooling Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 238000001035 drying Methods 0.000 description 3
- 239000012774 insulation material Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- 239000002699 waste material Substances 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000000737 periodic effect Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000003467 diminishing effect Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000003949 liquefied natural gas Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052573 porcelain Inorganic materials 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The invention discloses a waste heat utilization device for a gas shuttle kiln. The device comprises a chimney communicated with a kiln body and a heat exchange device surrounding the chimney. A heat exchange cavity is formed in the heat exchange device. One side of the heat exchange cavity clings to the outer wall of the chimney. A cold air inlet is formed in the bottom of the heat exchange device. A hot air outlet is formed in the top of the heat exchange device. The cold air inlet and the hot air outlet are both communicated with the heat exchange cavity. An exhaust fan is connected to the hot air outlet of the heat exchange device. The waste heat of flue gases exhausted by the gas shuttle kiln can be maximally utilized, the heat exchange efficiency is high, and an energy utilization rate is increased.
Description
Technical field
The present invention relates to a kind of residual heat using device of combustion gas shuttle kiln, belong to kiln body UTILIZATION OF VESIDUAL HEAT IN technical field.
Background technology
At present, along with the industrial development of China, energy problem is more and more outstanding.Ubiquity a kind of abnormal situation, and energy deficiency affects enterprise's utilization of capacity on the one hand; Energy waste is quite serious again on the other hand, and energy utilization rate is very low, and Production of Ceramics is one of industry that power consumption is larger in China's production in light industry, and kiln is the main energy consumption equipment that can not lack in the Production of Ceramics.Present stage, the thermal efficiency of ceramic industry kiln was generally lower, main cause is that kiln is discharged the major part that flue gas has been taken away furnace heat, recycling good this part heat is the effective means that improves the kiln energy utilization rate, recent years, a kind of unpowered shuttle kiln take liquefied natural gas as fuel respectively produces the porcelain district and has obtained popularizing faster in the whole nation, and further be generalized to chemical field beyond the ceramic industry, this liquefied gas is kiln intermittently, owing to adopted the novel measures such as refractory material, relative other kilns intermittently, energy-conservation reaching more than 20%, development trend and direction as ceramic industry kiln, certainly will substitute other process equipments that fall behind in the technological transformation of ceramic industry, social owning amount will get more and more, and following one by one problem is how to recycle its a large amount of waste heat.
Summary of the invention
Technical problem to be solved by this invention is to overcome the deficiencies in the prior art, and a kind of waste heat that can maximally utilise the discharge flue gas of combustion gas shuttle kiln is provided, and heat exchange efficiency is high, improves the residual heat using device of the combustion gas shuttle kiln of its energy utilization rate.
The present invention solves the problems of the technologies described above the technical scheme of taking: a kind of residual heat using device of combustion gas shuttle kiln, comprise the chimney that is communicated with the kiln body, also comprise heat-exchanger rig, heat-exchanger rig is trapped among the outside of chimney, has heat exchanging chamber in the heat-exchanger rig, one side of heat exchanging chamber is close on the outer wall of chimney, the bottom of heat-exchanger rig is provided with the cold wind import, the top of heat-exchanger rig is provided with hot-blast outlet, and cold wind import and hot-blast outlet all are communicated with heat exchanging chamber, and the hot-blast outlet place of heat-exchanger rig is connected with air exhauster.
Further, be provided with the hot blast direct export on the described chimney, this hot blast direct export is positioned at the top of heat-exchanger rig, be connected with air exhauster again after the hot-blast outlet of hot blast direct export by pipeline and heat-exchanger rig is communicated with, be provided with the flashboard of closed conduct on the pipeline between hot blast direct export and the hot-blast outlet.
Further, on the outer wall of described chimney hot-water heating system is installed, the bottom of hot-water heating system is provided with cooling water inlet, and the top of hot-water heating system is provided with hot water outlet.
After having adopted technique scheme, waste heat with flue gas in the chimney can utilize hot-water heating system to produce hot water to the cylinder for liquefied gas heat supply of combustion gas shuttle kiln, bottle interior residual air is used up substantially, with compare without hot water, particularly in the winter time, all remaining more tail gas in every steel cylinder can't use, be equivalent to dwindle the volume of steel cylinder, cause certain waste, residual air is finished in the steel cylinder if make, and the user have to be installed a water heater in addition additional, after the present invention installs hot-water heating system, not only saved the investment of water heater, also saved many fuel, can utilize heat-exchanger rig to produce hot blast with the waste heat of flue gas in the chimney and then supply with base substrate or product drying usefulness to be burnt, substitute original hot wind supply equipment, both reduced investment outlay, reduce fuel consumption, reduced again entreprise cost, though heat does not have the heat of abundant recovered flue gas, but total capacity usage ratio is improved, and accumulation is reclaimed heat with 100 4.5m
3Kiln is example, is equivalent to the nearly 1 kiloton standard coal of fuel savings every year, and economic benefits comparison is considerable.In addition; heat-exchanger rig of the present invention and hot-water heating system; the high temperature section chimney has also been played certain protective effect; prolonged the service life of chimney; saved the maintenance aspect of equipment, because the combustion gas shuttle kiln still belongs to periodic kilns the kiln, at cooling stage a large amount of dissipation of heats has been arranged still; by flashboard control, in the situation that does not affect product cooling in the kiln, can directly extract and utilize existing thermal source.
Description of drawings
Fig. 1 is the structural representation of the residual heat using device of combustion gas shuttle kiln of the present invention.
The specific embodiment
Content of the present invention is easier to be expressly understood in order to make, and the below is according to specific embodiment and by reference to the accompanying drawings, and the present invention is further detailed explanation.
As shown in Figure 1, a kind of residual heat using device of combustion gas shuttle kiln, comprise the chimney 2 that is communicated with kiln body 1, also comprise heat-exchanger rig 3, heat-exchanger rig 3 is trapped among the outside of chimney 2, has heat exchanging chamber 3-1 in the heat-exchanger rig 3, the side of heat exchanging chamber 3-1 is close on the outer wall of chimney 2, the bottom of heat-exchanger rig 3 is provided with cold wind import 3-1-1, the top of heat-exchanger rig 3 is provided with hot-blast outlet 3-1-2, and cold wind import 3-1-1 and hot-blast outlet 3-1-2 all are communicated with heat exchanging chamber 3-1, and the hot-blast outlet 3-1-2 place of heat-exchanger rig 3 is connected with air exhauster.
As shown in Figure 1, be provided with the directly exported 2-1 of hot blast on the chimney 2, the directly exported 2-1 of this hot blast is positioned at the top of heat-exchanger rig 3, be connected with air exhauster again after the directly exported 2-1 of hot blast passes through pipeline 4 and the hot-blast outlet 3-1-2 of heat-exchanger rig 3 is communicated with, be provided with the flashboard 5 of closed conduct 4 on the pipeline 4 between the directly exported 2-1 of hot blast and the hot-blast outlet 3-1-2.
As shown in Figure 1, hot-water heating system 6 is installed on the outer wall of chimney 2, the bottom of hot-water heating system 6 is provided with cooling water inlet 6-1, and the top of hot-water heating system 6 is provided with hot water outlet 6-2.
Operation principle of the present invention is as follows:
Waste heat with chimney 2 interior flue gases can utilize hot-water heating system 6 to produce hot water to the cylinder for liquefied gas heat supply of combustion gas shuttle kiln, bottle interior residual air is used up substantially, with compare without hot water, particularly in the winter time, all remaining more tail gas in every steel cylinder can't use, be equivalent to dwindle the volume of steel cylinder, cause certain waste, residual air is finished in the steel cylinder if make, the user have to be installed a water heater in addition additional, after the present invention installs hot-water heating system 6, not only save the investment of water heater, also saved many fuel, waste heat with chimney 2 interior flue gases can utilize heat-exchanger rig 3 generation hot blasts then to supply with base substrate or product drying to be burnt usefulness, substitute original hot wind supply equipment, both reduced investment outlay, reduce fuel consumption, reduced again entreprise cost, though heat does not have the heat of abundant recovered flue gas, total capacity usage ratio is improved, and accumulation is reclaimed heat with 100 4.5m
3Kiln is example, is equivalent to the nearly 1 kiloton standard coal of fuel savings every year, and economic benefits comparison is considerable.In addition; heat-exchanger rig 3 of the present invention and hot-water heating system 6; high temperature section chimney 2 has also been played certain protective effect; prolonged the service life of chimney 2; saved the maintenance aspect of equipment, because the combustion gas shuttle kiln still belongs to periodic kilns the kiln, at cooling stage a large amount of dissipation of heats has been arranged still; by flashboard 5 controls, in the situation that does not affect product cooling in the kiln, can directly extract and utilize existing thermal source.
Although the thermal efficiency of combustion gas shuttle kiln and energy consumption of unit product are more superior than the kiln at intermittence of other types, but still belong to the downdraf form, chimney 2 exhaust gas temperatures are quite high.By to co-content not, the shuttle kiln of different product carries out after the thermal balance test as can be known, the heat that flue gas is taken away accounts for 35% ~ 40% of fuel combustion heat, considerable, if directly extract flue gas utilization, be certain to affect the distribution of kiln inner pressure and temperature, not only can make kiln be difficult to operation control, even can cause combustion product to the pollution with hot department, therefore we can only collect the towards periphery heat that distributes of space of high-temperature flue gas, determine to add the purpose that heat-exchanger rig reaches UTILIZATION OF VESIDUAL HEAT IN at the chimney of shuttle kiln.
How could collect to greatest extent the waste heat of this kiln and how these heats with which kind of form are delivered to and use hot department, make the heat loss minimum, be key issue.According to heat transfer principle, flue gas by the chimney wall towards periphery space heat elimination include heat conduction, convection current and three kinds of diabatic processes of radiation, usually heat dissipation capacity can adopt following formula: Q=α (t
w-t) π dI, in the formula, α---the convection current radiation heat transfer coefficient between chimney outer wall and the surrounding air, unit: w/m
2℃; t
w, t---be respectively chimney outside wall temperature and ambient temperature, unit: ℃; D-chimney external diameter, m; I---chimney length, m.
Can find out that from this formula heat dissipation capacity is directly proportional with chimney length, but after outside chimney, installing heat-exchanger rig additional, just become the heat exchange between fluid and the solid (chimney wall), its process very complex all is to ask other heat exchange amounts, that is: Q=α with Newton's law of cooling as Calculating Foundation at present
k(t
w-t
f) F; In the formula, α
k---convective heat-transfer coefficient, w/m
2℃; t
w---with the solid wall surface temperature of fluid contact, ℃; t
f---the temperature of fluid, ℃; F---with the heat exchange area of fluid contact, m
2
Heat exchange amount Q and α in the following formula
k, F and temperature difference Δ t all be directly proportional, but because along with the increase of heat exchange area, in the constant situation of Diameter of chimney, namely increased the length of heat-exchanger rig, at this moment temperature difference Δ t is diminishing gradually, the heat-exchanger rig cost is also increasing α
kFunction complicated and changeable especially, relevant with shape, wall surface temperature, rate of flow of fluid, fluid temperature (F.T.) factors, according to these situations, through carefully calculating, determined key dimension and the heat exchange area of heat-exchanger rig, so that the heat exchange amount is larger, heat exchange efficiency is higher.
Utilize fume afterheat to pass through the hot water that hot-water heating system produces, mainly use and to cylinder for liquefied gas heating, one provides the required heat of liquefied gas evaporation, the 2nd, improve the temperature that liquefied gas enters kiln.Remaining thermogenetic hot-air is then delivered to drying equipment and used as thermal source, but must carry out INSULATION DESIGN to conveyance conduit, and satisfies the following requirement: 1. the insulation material thermal conductivity factor is less; 2. selected the porous insulation material, capacity is less; 3. the heat-resisting high temperature of insulation material is high and nonflammable; 4. selected materials have certain mechanical strength and water absorption rate little; 5. easy construction, cost is low.
Above-described specific embodiment; purpose of the present invention, technical scheme and beneficial effect are further described; institute is understood that; the above only is specific embodiments of the invention; be not limited to the present invention; within the spirit and principles in the present invention all, any modification of making, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (3)
1. the residual heat using device of a combustion gas shuttle kiln, comprise the chimney (2) that is communicated with kiln body (1), it is characterized in that: also comprise heat-exchanger rig (3), heat-exchanger rig (3) is trapped among the outside of chimney (2), has heat exchanging chamber (3-1) in the heat-exchanger rig (3), one side of heat exchanging chamber (3-1) is close on the outer wall of chimney (2), the bottom of heat-exchanger rig (3) is provided with cold wind import (3-1-1), the top of heat-exchanger rig (3) is provided with hot-blast outlet (3-1-2), and cold wind import (3-1-1) and hot-blast outlet (3-1-2) all are communicated with heat exchanging chamber (3-1), and the hot-blast outlet (3-1-2) of heat-exchanger rig (3) locates to be connected with air exhauster.
2. the residual heat using device of combustion gas shuttle kiln according to claim 1, it is characterized in that: be provided with hot blast direct export (2-1) on the described chimney (2), this hot blast directly exported (2-1) is positioned at the top of heat-exchanger rig (3), be connected with air exhauster again after hot blast directly exported (2-1) passes through pipeline (4) and the hot-blast outlet (3-1-2) of heat-exchanger rig (3) is communicated with, be provided with the flashboard (5) of closed conduct (4) on the pipeline (4) between hot blast directly exported (2-1) and the hot-blast outlet (3-1-2).
3. the residual heat using device of combustion gas shuttle kiln according to claim 1 and 2, it is characterized in that: hot-water heating system (6) is installed on the outer wall of described chimney (2), the bottom of hot-water heating system (6) is provided with cooling water inlet (6-1), and the top of hot-water heating system (6) is provided with hot water outlet (6-2).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210527565.6A CN103033062B (en) | 2012-12-10 | 2012-12-10 | The residual heat using device of combustion gas shuttle kiln |
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| CN201210527565.6A CN103033062B (en) | 2012-12-10 | 2012-12-10 | The residual heat using device of combustion gas shuttle kiln |
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| CN103033062A true CN103033062A (en) | 2013-04-10 |
| CN103033062B CN103033062B (en) | 2016-03-02 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103277853A (en) * | 2013-05-23 | 2013-09-04 | 杭州江鸣机械技术有限公司 | Outer circulation gas energy heating air conditioner |
| CN103486871A (en) * | 2013-09-25 | 2014-01-01 | 宁波佳比佳工贸有限公司 | Melting furnace chimney with waste heat recovery structure |
| CN107764072A (en) * | 2017-09-30 | 2018-03-06 | 宜兴市海科耐火材料制品有限公司 | A kind of Heat Room type energy-saving type shuttle type kiln |
| CN110425896A (en) * | 2019-08-07 | 2019-11-08 | 佛山市奥斯博机械设备有限公司 | A kind of magnesia and ceramic core shuttle kiln |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103277853A (en) * | 2013-05-23 | 2013-09-04 | 杭州江鸣机械技术有限公司 | Outer circulation gas energy heating air conditioner |
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| CN103486871A (en) * | 2013-09-25 | 2014-01-01 | 宁波佳比佳工贸有限公司 | Melting furnace chimney with waste heat recovery structure |
| CN103486871B (en) * | 2013-09-25 | 2015-11-25 | 宁波佳比佳工贸有限公司 | Melting furnace chimney with waste heat recovery structure |
| CN107764072A (en) * | 2017-09-30 | 2018-03-06 | 宜兴市海科耐火材料制品有限公司 | A kind of Heat Room type energy-saving type shuttle type kiln |
| CN110425896A (en) * | 2019-08-07 | 2019-11-08 | 佛山市奥斯博机械设备有限公司 | A kind of magnesia and ceramic core shuttle kiln |
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| CN103033062B (en) | 2016-03-02 |
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