CN103033062B - The residual heat using device of combustion gas shuttle kiln - Google Patents
The residual heat using device of combustion gas shuttle kiln Download PDFInfo
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- CN103033062B CN103033062B CN201210527565.6A CN201210527565A CN103033062B CN 103033062 B CN103033062 B CN 103033062B CN 201210527565 A CN201210527565 A CN 201210527565A CN 103033062 B CN103033062 B CN 103033062B
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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
Abstract
The invention discloses a kind of residual heat using device of combustion gas shuttle kiln, comprise the chimney be communicated with kiln body, also comprise heat-exchanger rig, heat-exchanger rig is trapped among the outside of chimney, has heat exchanging chamber in heat-exchanger rig, and the side of heat exchanging chamber is close on the outer wall of chimney, the bottom of heat-exchanger rig is provided with cold wind import, the top of heat-exchanger rig is provided with hot-blast outlet, and cold wind import is all communicated with heat exchanging chamber with hot-blast outlet, and the hot-blast outlet place of heat-exchanger rig is connected with air exhauster.The present invention can maximally utilise the waste heat of the discharge flue gas of combustion gas shuttle kiln, and heat exchange efficiency is high, improves its energy utilization rate.
Description
Technical field
The present invention relates to a kind of residual heat using device of combustion gas shuttle kiln, belong to kiln body technical field of waste heat utilization.
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 the larger industry that consumes energy in China's production in light industry, and kiln is the main energy consumption equipment that can not lack in Production of Ceramics.Present stage, the thermal efficiency of ceramic industry kiln was general lower, main cause is that kiln discharge flue gas has taken away the major part of furnace heat, recycling this part heat good is the effective means improving kiln energy utilization rate, recent years, a kind of is that the unpowered shuttle kiln of fuel obtains in national Ge Chanci district and popularizes faster with liquefied natural gas, and the chemical field be generalized to further beyond ceramic industry, this liquefied gas interval kiln, owing to have employed the measures such as novel refractory material, other interval kilns relatively, energy-conservationly reach more than 20%, as development trend and the direction of ceramic industry kiln, the process equipment that other fall behind certainly will be instead of in the technological transformation of ceramic industry, society's owning amount will get more and more, following one by one problem how to recycle its a large amount of waste heat.
Summary of the invention
Technical problem to be solved by this invention overcomes the deficiencies in the prior art, provide a kind of waste heat that can maximally utilise the discharge flue gas of combustion gas shuttle kiln, 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 taked: a kind of residual heat using device of combustion gas shuttle kiln, comprise the chimney be communicated with kiln body, also comprise heat-exchanger rig, heat-exchanger rig is trapped among the outside of chimney, in heat-exchanger rig, there is heat exchanging chamber, the side of heat exchanging chamber is close on the outer wall of chimney, the bottom of heat-exchanger rig is provided with cold wind import, the top of heat-exchanger rig is provided with hot-blast outlet, and cold wind import is all communicated with heat exchanging chamber with hot-blast outlet, the hot-blast outlet place of heat-exchanger rig is connected with air exhauster.
Further, described chimney is provided with hot blast direct export, this hot blast direct export is positioned at the top of heat-exchanger rig, be connected with air exhauster again after hot blast direct export is communicated with the hot-blast outlet of heat-exchanger rig by pipeline, the pipeline between hot blast direct export and hot-blast outlet be provided with the flashboard of closed conduct.
Further, the outer wall of described chimney is provided with hot-water heating system, 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 have employed technique scheme, hot-water heating system can be utilized to produce hot water to the cylinder for liquefied gas heat supply of combustion gas shuttle kiln with the waste heat of flue gas in chimney, residual air in bottle is used up substantially, with compared with hot water, particularly in the winter time, all remain more tail gas in every steel cylinder cannot use, be equivalent to the volume reducing steel cylinder, cause certain waste, if make residual air in steel cylinder be finished, user separately have to install a water heater additional, after the present invention installs hot-water heating system, not only save the investment of water heater, also save much fuel, heat-exchanger rig can be utilized to produce hot blast with the waste heat of flue gas in chimney then to supply base substrate or wait that burning product drying uses, substitute original hot wind supply equipment, both reduced investment outlay, reduce fuel consumption, again reduce entreprise cost, though heat does not have the heat of abundant recovered flue gas, but total capacity usage ratio is improved, accumulation reclaims heat with 100 4.5m
3kiln is example, is equivalent to every year save the nearly 1 kiloton standard coal of fuel, and economic benefits comparison is considerable.In addition; heat-exchanger rig of the present invention and hot-water heating system; certain protective effect is also served to high temperature section chimney; extend the service life of chimney; save the maintenance aspect of equipment, because combustion gas shuttle kiln still belongs to periodic kilns the kiln, still have a large amount of heats to distribute at cooling stage; controlled by flashboard, directly can extract when not affecting product cooling in kiln and utilize existing thermal source.
Accompanying drawing explanation
Fig. 1 is the structural representation of the residual heat using device of combustion gas shuttle kiln of the present invention.
Detailed description of the invention
In order to make content of the present invention more easily be clearly understood, below according to specific embodiment also by reference to the accompanying drawings, 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 be communicated with kiln body 1, also comprise heat-exchanger rig 3, heat-exchanger rig 3 is trapped among the outside of chimney 2, there is in heat-exchanger rig 3 heat exchanging chamber 3-1, 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 is all communicated with heat exchanging chamber 3-1 with hot-blast outlet 3-1-2, the hot-blast outlet 3-1-2 place of heat-exchanger rig 3 is connected with air exhauster.
As shown in Figure 1, chimney 2 is provided with the directly exported 2-1 of hot blast, 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 is communicated with the hot-blast outlet 3-1-2 of heat-exchanger rig 3 by pipeline 4, the pipeline 4 between the directly exported 2-1 and hot-blast outlet 3-1-2 of hot blast be provided with the flashboard 5 of closed conduct 4.
As shown in Figure 1, the outer wall of chimney 2 is provided with hot-water heating system 6, 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:
Hot-water heating system 6 can be utilized to produce the cylinder for liquefied gas heat supply of hot water to combustion gas shuttle kiln with the waste heat of flue gas in chimney 2, residual air in bottle is used up substantially, with compared with hot water, particularly in the winter time, all remain more tail gas in every steel cylinder cannot use, be equivalent to the volume reducing steel cylinder, cause certain waste, if make residual air in steel cylinder be finished, user separately have to install a water heater additional, after the present invention installs hot-water heating system 6, not only save the investment of water heater, also save much fuel, heat-exchanger rig 3 can be utilized to produce hot blast with the waste heat of flue gas in chimney 2 then to supply base substrate or wait that burning product drying uses, substitute original hot wind supply equipment, both reduced investment outlay, reduce fuel consumption, again reduce entreprise cost, though heat does not have the heat of abundant recovered flue gas, but total capacity usage ratio is improved, accumulation reclaims heat with 100 4.5m
3kiln is example, is equivalent to every year save the nearly 1 kiloton standard coal of fuel, and economic benefits comparison is considerable.In addition; heat-exchanger rig 3 of the present invention and hot-water heating system 6; certain protective effect is also served to high temperature section chimney 2; extend the service life of chimney 2; save the maintenance aspect of equipment, because combustion gas shuttle kiln still belongs to periodic kilns the kiln, still have a large amount of heats to distribute at cooling stage; controlled by flashboard 5, directly can extract when not affecting product cooling in kiln and utilize existing thermal source.
Although the thermal efficiency of combustion gas shuttle kiln and energy consumption of unit product more superior than the interval kiln of other types, but still belong to downdraf form, chimney 2 exhaust gas temperature is quite high.By to not co-content, it is known after the shuttle kiln of different product carries out Thermal Balance Test, 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 the distribution affecting kiln inner pressure and temperature, kiln not only can be made to be difficult to operation control, combustion product even can be caused the pollution with hot department, therefore we can only collect the high-temperature flue gas heat that distributes of space towards periphery, determine on the chimney of shuttle kiln, to add heat-exchanger rig to reach the object of UTILIZATION OF VESIDUAL HEAT IN.
How could collect the waste heat of this kiln to greatest extent and how be delivered in what manner by these heats and use hot department, making heat loss minimum, is key issue.According to heat transfer principle, flue gas by chimney wall towards periphery space heat elimination include heat conduction, convection current and radiation three kinds of diabatic processes, usual heat dissipation capacity can adopt following formula: Q=α (t
w-t) π dI, in formula, α---the convection current radiation heat transfer coefficient between chimney outer wall and surrounding air, unit: w/m
2dEG C; t
w, t---be respectively chimney outside wall temperature and ambient temperature, unit: DEG C; D-chimney external diameter, m; I---chimney length, m.
As can be seen from this formula, heat dissipation capacity is directly proportional to chimney length, but install heat-exchanger rig additional outside chimney after, just become the heat exchange between fluid and solid (chimney wall), its process is quite complicated, all ask other heat exchange amounts, that is: Q=α using Newton's law of cooling as calculating basis at present
k(t
w-t
f) F; In formula, α
k---convective heat-transfer coefficient, w/m
2dEG C; t
w---with the solid wall surface temperature of fluid contact, DEG C; t
f---the temperature of fluid, DEG C; F---with the heat exchange area of fluid contact, m
2.
Heat exchange amount Q and α in above formula
k, F and temperature difference Δ t is all directly proportional, but due to the increase along with heat exchange area, when Diameter of chimney is constant, namely increase the length of heat-exchanger rig, at this moment temperature difference Δ t is diminishing gradually, heat-exchanger rig cost also in increase, α
ka function 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, determine key dimension and the heat exchange area of heat-exchanger rig, make heat exchange amount comparatively large, heat exchange efficiency is higher.
Utilize the hot water that fume afterheat is produced by hot-water heating system, mainly heat with to cylinder for liquefied gas, one is to provide the heat needed for liquefied gas evaporation, and two is improve the temperature that liquefied gas enters kiln.Remaining thermogenetic hot-air is then delivered to drying equipment and is used as thermal source, but must carry out INSULATION DESIGN to conveyance conduit, and meets the following requirement: 1. insulation material thermal conductivity factor is less; 2. selected porous insulation material, capacity is less; 3. the heat-resisting high temperature of insulation material is high and nonflammable; 4. selected materials has certain mechanical strength and water absorption rate is little; 5. easy construction, cost is low.
Above-described specific embodiment; object of the present invention, technical scheme and beneficial effect are further described; be understood that; the foregoing is only specific embodiments of the invention; be not limited to the present invention; within the spirit and principles in the present invention all, any amendment made, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (1)
1. the residual heat using device of a combustion gas shuttle kiln, comprise the chimney (2) be 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), there is in heat-exchanger rig (3) heat exchanging chamber (3-1), 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) is all communicated with heat exchanging chamber (3-1) with hot-blast outlet (3-1-2), hot-blast outlet (3-1-2) place of heat-exchanger rig (3) is connected with air exhauster, described chimney (2) is provided with hot blast direct export (2-1), this hot blast direct export (2-1) is positioned at the top of heat-exchanger rig (3), hot blast direct export (2-1) is connected with air exhauster after being communicated with the hot-blast outlet (3-1-2) of heat-exchanger rig (3) by pipeline (4) again, pipeline (4) between hot blast direct export (2-1) and hot-blast outlet (3-1-2) is provided with the flashboard (5) of closed conduct (4), the outer wall of described chimney (2) is provided with hot-water heating system (6), the bottom of hot-water heating system (6) is provided with cooling water inlet (6-1), the top of hot-water heating system (6) is provided with hot water outlet (6-2).
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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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| CN201210527565.6A CN103033062B (en) | 2012-12-10 | 2012-12-10 | The residual heat using device of combustion gas shuttle kiln |
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| CN103033062B true CN103033062B (en) | 2016-03-02 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103277853B (en) * | 2013-05-23 | 2017-07-28 | 赵亮 | A kind of outer circulation combustion gas energy heating air conditioner |
| 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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Effective date of registration: 20170417 Address after: 412200 Liling City, Zhuzhou province Sun Bay Township, long tiger Bay Village Patentee after: Pukou Liling Electric Porcelain Manufacturing Co., Ltd. Address before: 412200 Liling City, Zhuzhou province Sun Bay Township, long tiger Bay Village Patentee before: Top Collection Co., Ltd. |
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Effective date of registration: 20190627 Address after: 412200 Longhuwan Village, Sunjiawan Township, Liling City, Zhuzhou City, Hunan Province Patentee after: Top Collection Co., Ltd. Address before: 412200 Longhuwan Village, Sunjiawan Township, Liling City, Zhuzhou City, Hunan Province Patentee before: Pukou Liling Electric Porcelain Manufacturing Co., Ltd. |