CN101507527B - High-efficiency heat exchanger for roasting tobacco leaf - Google Patents
High-efficiency heat exchanger for roasting tobacco leaf Download PDFInfo
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- CN101507527B CN101507527B CN2008102463163A CN200810246316A CN101507527B CN 101507527 B CN101507527 B CN 101507527B CN 2008102463163 A CN2008102463163 A CN 2008102463163A CN 200810246316 A CN200810246316 A CN 200810246316A CN 101507527 B CN101507527 B CN 101507527B
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- heat exchanger
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- finned tube
- curing
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Abstract
The invention relates to an efficient fin type heat exchanger for curing tobacco, and belongs to the technical field of tobacco curing facilities. The fin type heat exchanger comprises a furnace body, a finned pipe, a header and a chimney, wherein the furnace body adopts modes of once coal addition and unilateral ignition; and the finned pipe is connected with the header and spanned over the furnace body. The middle part of the header is provided with a partition board for preventing flue gas from flowing. The lateral surface and the bottom surface of the header are provided with ash cleaning holes of the heat exchanger respectively, and an ash cleaning door is hermetically connected by adopting a turn button. The fin type heat exchanger has the characteristics of high heat exchange efficiency, light weight, large heat exchange area, convenient operations for cleaning ash and maintaining and time and labor conservation for curing, can effectively improve the heat efficiency of a tobacco curing barn, and achieve energy conservation and consumption reduction.
Description
Technical field
The invention belongs to tobacco leaf baking facility technology field, relate to a kind of high-performance heat exchanger that is used for baking tobacco leaves.
Background technology
In tobacco leaf baking dry run, air is the carrier of heat as working media, is again the carrier that wets, and can regard it as the drier of tobacco leaf.Between air and the tobacco leaf, and leaf texture's inner generation heat exchange and matter (moisture) exchange, heat exchange is that heat is given tobacco leaf by transfer of air, the matter exchange is that moisture is passed to air by tobacco leaf.Barn is the important infrastructure device of tobacco flue-curing, and advanced baking process has only by well behaved barn could produce its due effect.At present, the barn that China has promoted mainly is divided into traditional flue-curing barn and bulk curing barn, and wherein intensive baking room is the emphasis of promoting.The structure of intensive baking room mainly comprises cigarette-filling house and heating clamber, and heat exchanger and blower fan are arranged in the heating clamber of barn, and cigarette frame and humidity-discharging device are arranged in cigarette-filling house.The air that enters heating clamber by heat exchanger to its heating after, under the effect of circulating fan, enter in the cigarette-filling house tobacco leaf toasted.
Heat exchanger is one of main equipment of tobacco curing barn, and its performance directly affects the quality and the specific energy consumption of tobacco flue-curing.Along with the tobacco grower to the improving constantly of tobacco curing barn heat exchanger quality requirement, strict requirement has all been done to steel selection, thickness, area of dissipation and the furnace binding etc. of tobacco curing barn heat exchanger by State Tobacco Monopoly Bureau.The problem that present heat exchanger exists is mainly in the following aspects: (1) exchanger heat efficient is not high, it is big to cause the tobacco grower to toast coal consumption, baking cost height, income reduce, up to the present also without any a tame tobacco flue-curing supply of equipment producer's design or a use high-performance heat exchanger.(2) most of heat exchangers are owing to need reach the requirement of method for flue-curing tobacco leaves to area of dissipation and material thickness, and heat exchanger integral body is relatively heavier, is unfavorable for installation and maintenance, and contradiction is especially outstanding in the underdeveloped outlying mountain area of mechanization degree; (3) heat exchanger deashing difficulty after soot particle is attached on the heat exchanger tube inwall, has a strong impact on the heat transfer process of metal, causes the heat exchanger heat exchange efficiency sharply to descend.And because purchase cost is limited, the heat exchanger that tobacco flue-curing is at present used can't be installed automatic ash removing device, deashing process mainly adopts artificial deashing behind the bolted shoot door by opening, through behind several baking cycles, bolt is because the high temperature action distortion, cause great difficulty for the cleaning and the maintenance of heat exchanger, and then influence heat exchanger heat-transfer performance.(4) the main heat dissipation region position of most of heat exchangers relatively disperses, and is unfavorable for enhanced heat exchange under the condition of blower fan forced convertion; (5) adopt traditional coal car coal-adding type, labour intensity is big, and is time-consuming.
Heat exchanger is as a kind of general heat transmission equipment, and the raising of its heat exchange property will bring very big society and economy benefit.Energy-saving and cost-reducing is the theme of world today's economy of energy, and the exploitation of tobacco curing barn heat exchanger and design should meet energy-saving and cost-reducing thought.The thermal efficiency that improves tobacco curing barn has become an urgent demand of design of heat exchanger.Finned tube is a kind of pipe fitting of heat exchange efficiently, its development starts from U.S.'s petrochemical industry of nineteen fifty, aerial cooler in China's petrochemical industry and the power industry mostly adopts finned tube to make the heat exchange original paper in recent years, still do not have any one tame tobacco flue-curing supply of equipment producer's design so far or use high-performance heat exchanger, finned tube is applied in the tobacco flue-curing heat exchanger, will improve the thermal efficiency of tobacco curing barn, realize the energy-saving and cost-reducing of tobacco flue-curing.In petrochemical industry and power industry,, have only physical process, so the design of finned tube exchanger is comparatively simple owing to be that two kinds of clean media of water and air conduct heat mutually.Different therewith, when finned tube exchanger is used for the tobacco flue-curing process, because the tobacco flue-curing process is not just simply with the moisture evaporate to dryness in the tobacco leaf, wherein the complex physical biochemical action can take place in tobacco leaf, the characteristics that contain chemical process and physical process at whole bake process simultaneously, the design of heat exchanger must require to carry out according to baking process, therefore tobacco flue-curing is more complicated with the design of heat exchanger, simultaneously owing to contain a large amount of dusts in the flue gas, brought difficulty also for the design, deashing etc. of heat exchanger.
Summary of the invention
The object of the present invention is to provide a kind of high-performance heat exchanger that is used for baking tobacco leaves, this heat exchanger can effectively increase the heat exchange efficiency of the heat exchange area of heat exchanger, the rolled steel dosage that reduces the heat exchanger manufacturing, raising heat exchanger, and deashing process is simple, easy to operate simultaneously.
The high-performance heat exchanger that is used for baking tobacco leaves provided by the invention, it is characterized in that: adopt finned tube as heat exchange element, connect by finned tube between first, second header, be provided with dividing plate in first header, form exhaust gases passes between first header, finned tube and second header, the porch of this exhaust gases passes links to each other with the outlet of body of heater, and the exit of this exhaust gases passes links to each other with chimney.
Not high for overcome the heat exchange efficiency that has the existence of barn heat exchanger now as far as possible, quality is big, structure is heavy, installation and maintenance are inconvenient, the deashing difficulty, heat dissipation region is disperseed, the coal car coal is time-consuming, problems such as bolt ease of connection deformation failure the invention provides the high-efficiency fin formula heat exchanger that a kind of tobacco flue-curing is used.Particularly, the present invention has following characteristics:
(1) heat exchanger adopts the finned tube heat radiation that volume is little, heat transfer area is big, efficient is high.Finned tube adopts in-line arrangement or fork row's pipe row compound mode to arrange.The flue gas that comes out from burner hearth enters finned tube inside by pipeline or header, and heat is conducted to the outer fin of pipe.Under the effect of blower fan forced convertion, air carries out enhanced heat exchange with the finned tube that is subjected to the flue gas heating.Heat radiation steel pipe with long 1m, external diameter 133mm, thick 3mm is an example, and when adopting light pipe, its appearance heat exchange area is 0.42m
2, weight is 9.8kg; When adopting the finned tube of the high 20mm of wing, the thick 1.2mm of wing, wing spacing 5mm, its appearance heat exchange area is 4.14m
2, be about 10 times of light pipe area of dissipation, and weight 26.3kg only, be about 3 times of light pipe weight.
(2) body of heater of heat exchanger adopts disposable coal and one-sided sparking mode.Burner hearth bottom is constructed to the slope with certain slope, and the mode that honeycomb briquette is taked to topple over is neatly stacked along the slope direction.When beginning to toast, at first from the igniting of slope lowest part, along with the carrying out of baking, honeycomb briquette will be burnt toward eminence by low along the slope direction.Size according to dress cigarette amount can be determined disposable number of coalingging, and realizes adorning the purpose of a pit coal, a roasting a heatable brick bed cigarette.The combustion case of honeycomb briquette can carry out automatic or manual control to it by air blast.Baking labour intensity obviously reduces saving of work and time.
(3) heat exchanger adopts the knob sealing.Heat exchanger tube is the main heat exchanger components of heat exchanger, and the deposition of ash will have a strong impact on the heat exchange of high-temperature flue gas and heat exchanger tube in the pipe, and then the exchange capability of heat of whole heat exchanger is reduced greatly.In the position of heat exchanger deashing or maintenance, adopt knob to connect sealing, when deashing or maintenance, only knob need be outwarded winding, heat exchanging organ pipe road and casing purge, and be convenient and swift.The convenient purge mode of heat exchanger tube and casing can improve the whole exchange capability of heat of heat exchanger greatly.
(4) be provided with dividing plate in the heat exchanger, realize that the multiloop of flue gas in finned tube flows.By increasing the time of staying of flue gas in finned tube, make flue gas and finned tube carry out heat exchange more fully, improve the whole exchange capability of heat of heat exchanger, lower the exhaust gas temperature of barn simultaneously, the thermal efficiency of barn is improved.
Description of drawings
Fig. 1 is the structural representation of a kind of specific embodiment of high-performance heat exchanger of the present invention.
Fig. 2 seals schematic diagram for the knob that Fig. 1 adopted.
Fig. 3 is the outline drawing of the finned tube of the present invention's use.
Fig. 4 is the structural representation of second kind of specific embodiment of first, second header.
Fig. 5 is the structural representation of the third specific embodiment of first, second header.
The specific embodiment
The present invention is described in further detail below in conjunction with accompanying drawing and example.
As shown in Figure 1, the heat exchanger that tobacco curing barn is used comprises body of heater 1, first, second header 2,2 ', finned tube 3 and chimney 4.
The burner hearth bottom surface of body of heater 1 is the slope, takes disposable coal and one-sided sparking mode.Honeycomb briquette can be loaded to high side B by furnace bottom downside A along the direction that the gradient increases, and the honeycomb briquette loadings is done suitable adjustment according to dress cigarette amount, makes it can realize adorning a pit coal and dries an a heatable brick bed cigarette.When preparing baking, to the honeycomb briquette igniting of furnace bottom A side.The dividing plate 5 that is used to intercept flue gas is housed in first header 2.The bottom of first header 2 is communicated with by the top of flue with body of heater 1; The top of first header 2 is communicated with chimney 4.Be respectively arranged with the cleaning door of heat exchanger in the bottom of the left side of first header 2 and second header 2 '.Be communicated with by finned tube 3 between first, second header 2,2 '.Form exhaust gases passes between first header 2, finned tube 3 and second header 2 '.
As shown in Figure 2, the edge of cleaning door is a groove, has high temperature resistant packing ring in the groove.The edge of shoot door is the projection 7 that is complementary with groove, and the knob 6 of shoot door employing activity seals.When tightening knob 6, the projection 7 and the groove of shoot door staple together, and avoid the flue gas in the heat exchanger to flow out.When needing deashing, directly the knob of two shoot doors is turned on, the cigarette ash that deposits in the finned tube is purged, convenient to operation.With reference to figure 1, the flue gas that burner hearth comes out at first enters first header, 2 bottoms through flue, the finned tube that is communicated with first header, 2 bottoms enters the bottom of second header 2 ', and portion enters first header, 2 tops by finned tube 3 from it again, is discharged in the atmosphere by chimney breast 4 at last.By optimization, can when smoke evacuation is unobstructed, realize the maximization of flue gas heat utilization rate to flue gas flow resistance and heat exchange property in pipeline.
The heat exchanger fin tubular construction that the present invention adopts as shown in Figure 3, the wing height of finned tube, wing are thick, spacing can obtain by thermal conduction study optimization.The heat exchanger light pipe of contrast equal length, finned tube has bigger area of dissipation, and during baking tobacco leaves, under the effect of blower fan, finned tube can be more effectively with the air in the heat transferred Heat Room of flue gas.Simultaneously, after adopting finned tube, than traditional light pipe heat exchanger, employed heat exchanger tube number of finned tube exchanger or size can correspondingly reduce, and have reduced the total quality of heat exchanger on the one hand, and be easy to installation and maintenance, can make the heat exchange zone of heat exchanger more concentrated on the other hand, under the blower fan blasting action, the thermal air current dynamic resistance reduces, and the forced-convection heat transfer effect in finned tube and the Heat Room between the hot-air is stronger.
In the said structure, the top of second header 2 ' also can be provided with dividing plate, constitutes the exhaust gases passes of serpentine, its structure such as Fig. 4.On the basis of Fig. 4, can also two dividing plates be set in first header 2, form the exhaust gases passes of many bends, its structure is as shown in Figure 5.
The above is preferred embodiment of the present invention, but the present invention should not be confined to the disclosed content of this embodiment and accompanying drawing.So everyly do not break away from the equivalence of finishing under the spirit disclosed in this invention or revise, all fall into the scope of protection of the invention.
Claims (4)
1. high-performance heat exchanger that is used for baking tobacco leaves, it is characterized in that: adopt finned tube as heat exchange element, connect by finned tube (3) between first, second header (2,2 '), first header is provided with first dividing plate in (2), the bottom of first header (2) is communicated with by the top of exhaust gases passes with body of heater (1), the top of first header is communicated with chimney (4), and the porch of this exhaust gases passes links to each other with the outlet of body of heater (1), and the exit of this exhaust gases passes links to each other with chimney (4);
The edge of the cleaning door on first, second header (2,2 ') all has groove, has high temperature resistant packing ring in this groove; The edge of shoot door is provided with the projection (7) that is complementary with this groove, also is provided with the knob (6) that is used to be tightly connected on the shoot door.
2. high-performance heat exchanger according to claim 1 is characterized in that: the burner hearth bottom surface of body of heater (1) is the slope.
3. high-performance heat exchanger according to claim 1 and 2 is characterized in that: the top in second header (2 ') also is provided with second partition, forms the serpentine exhaust gases passes between first header (2), finned tube (3) and second header (2 ').
4. high-performance heat exchanger according to claim 1 and 2, it is characterized in that: the top in second header (2 ') is provided with second partition, the top of first header (2) also is provided with the 3rd dividing plate, forms many bends exhaust gases passes between first header (2), finned tube (3) and second header (2 ').
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102463163A CN101507527B (en) | 2008-12-30 | 2008-12-30 | High-efficiency heat exchanger for roasting tobacco leaf |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008102463163A CN101507527B (en) | 2008-12-30 | 2008-12-30 | High-efficiency heat exchanger for roasting tobacco leaf |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101507527A CN101507527A (en) | 2009-08-19 |
| CN101507527B true CN101507527B (en) | 2011-05-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2008102463163A Expired - Fee Related CN101507527B (en) | 2008-12-30 | 2008-12-30 | High-efficiency heat exchanger for roasting tobacco leaf |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101991181B (en) * | 2010-12-02 | 2012-10-10 | 云南省烟草农业科学研究院 | Prevention and treatment method for reducing SO2 toxic hazard during dense tobacco leaf baking |
| CN102944003B (en) * | 2012-10-22 | 2014-03-26 | 华中科技大学 | Heat supply system combining tobacco seedling with tobacco baking |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2092043U (en) * | 1991-04-03 | 1992-01-01 | 范新财 | Plug-in double-door oven port |
| CN2257373Y (en) * | 1996-01-31 | 1997-07-02 | 黑龙江省新星油脂技术开发有限公司 | Spray-type heat exchanger for vegetable fat leaching technology |
| CN2589915Y (en) * | 2002-12-29 | 2003-12-03 | 山东晨鸣纸业集团股份有限公司 | Aerated water heat-reclaiming device |
| CN2682850Y (en) * | 2003-12-19 | 2005-03-09 | 梁浩坤 | Hermetic door oven |
| CN201159583Y (en) * | 2007-10-23 | 2008-12-03 | 刘奕平 | Heating apparatus of baking room |
-
2008
- 2008-12-30 CN CN2008102463163A patent/CN101507527B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2092043U (en) * | 1991-04-03 | 1992-01-01 | 范新财 | Plug-in double-door oven port |
| CN2257373Y (en) * | 1996-01-31 | 1997-07-02 | 黑龙江省新星油脂技术开发有限公司 | Spray-type heat exchanger for vegetable fat leaching technology |
| CN2589915Y (en) * | 2002-12-29 | 2003-12-03 | 山东晨鸣纸业集团股份有限公司 | Aerated water heat-reclaiming device |
| CN2682850Y (en) * | 2003-12-19 | 2005-03-09 | 梁浩坤 | Hermetic door oven |
| CN201159583Y (en) * | 2007-10-23 | 2008-12-03 | 刘奕平 | Heating apparatus of baking room |
Non-Patent Citations (1)
| Title |
|---|
| 史月涛.螺旋翅片管防磨和防积灰特性的试验研究.《动力工程》.2006,第26卷(第1期),第145页. * |
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Granted publication date: 20110518 Termination date: 20131230 |