CN103283872A - Application of heat pipe heat exchanger in tea processing - Google Patents
Application of heat pipe heat exchanger in tea processing Download PDFInfo
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- CN103283872A CN103283872A CN2013102068786A CN201310206878A CN103283872A CN 103283872 A CN103283872 A CN 103283872A CN 2013102068786 A CN2013102068786 A CN 2013102068786A CN 201310206878 A CN201310206878 A CN 201310206878A CN 103283872 A CN103283872 A CN 103283872A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D15/00—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies
- F28D15/02—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes
- F28D15/0275—Arrangements for coupling heat-pipes together or with other structures, e.g. with base blocks; Heat pipe cores
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Abstract
The invention provides application of a heat pipe heat exchanger in tea processing, and the heat pipe heat exchanger is used for waste heat recovery in the tea processing. The heat pipe heat exchanger adopts a gas-gas gravity type heat pipe heat exchanger, and the heat pipe heat exchanger is installed above a gas discharging port of a hot air deblocking machine, a green removing machine or a drying machine. According to the application of the heat pipe heat exchanger in the tea processing, a gas-gas normal-temperature gravity type heat pipe heat exchanger is applied in the field of waste heat recovery in the tea processing, so that the heat energy is effectively utilized, and the cost of production equipment is reduced.
Description
Technical field
The application of a kind of heat exchange of heat pipe of the present invention in Tea Processing relates to processing field of tea leaves.
Background technology
The sorting technique of heat pipe has multiple, distinguishes according to the operating temperature in the pipe, can be divided into Cryo Heat Tube :-273～0 ℃, and the normal temperature heat pipe: 0～250 ℃, moderate temperature heat pipe: 250～450 ℃, high-temperature heat pipe: 450～1000 ℃.Distinguish according to hydraulic fluid backflow power, can be divided into the core heat pipe is arranged, gravity assisted heat pipe, gravity auxiliary heat pipe, rotating heat pipe, electrohydrodynamic heat pipe, magneto hydrodynamic heat pipe, infiltration heat pipe etc.Distinguish according to version, can be divided into general heat pipe, separate heat pipe, capillary pump loop heat pipe, micro heat pipe, flat-plate heat pipe, radial heat pipe etc.Because the heat exchange area of single heat pipe is very limited, in engineering application, in order to increase heat exchange area, some heat pipes can be combined as required, just formed the heat exchange of heat pipe of various heterogeneitys and purposes.Heat exchange of heat pipe is generally divided according to the state of hot fluid and cold fluid, and gas-gas type, gas-liquid type, liquid-liquid type, liquid-gas formula are arranged.Also have according to the version of heat exchange of heat pipe and divide, can be divided into monoblock type, separate type, swinging and combined type again.Heat exchange of heat pipe have heat transfer efficiency height, compact conformation, fluid resistance little, be conducive to control advantages such as dew point corrosion, demonstrate very outstanding advantage for traditional heat and mass equipment rehabilitation.
Bright leaf after plucking is made into dried tea, and its water content will progressively be reduced to 4% from 75%, and many operations come down to the dry run of a series of continuous dehydrations.As everyone knows, all prophyll tea making processing factories in process of production, the discharge capacity of hot and humid gas is all bigger, as complete, operations such as hot blast deblocks, drying, Titian.In these tea making equipment, hot blast has only utilized once and has just all discharged.After testing, the discharge tail gas temperature-averaging is about 80 ℃.This part tail gas is because humidity is bigger, and is not recycling again, but discharged wholly.So the heat energy utilization rate of these equipment is very low, the heat-insulating property of equipment is relatively poor, and what have has only heat energy utilization rate about 30%, we can say that the energy consumption of Tea Processing is very high.The tail gas that these are in line has not only increased the enterprise operation cost, simultaneously, has also polluted production environment, causes the temperature of workshop inner air, humidity to increase, and brings adverse influence to tea leaf quality.
Gas-gas gravity type heat pipe heat exchanger takes their own roads tail gas and new wind owing to adopted the central dividing plate sealing device, does not intersect mutually.The waste heat of tail gas is delivered to the upper end by the lower end of heat pipe, and the new wind under the normal temperature state is carried out preheating, new wind-warm syndrome degree can be improved 30～40 ℃.The temperature of tail gas reduces after the heat exchange, discharges after making the part water recovery.Because adopted dried, humid gas subregion, the humidity of new wind is relatively low, and the hot blast after the heating is relatively drier, makes that the efficient of tealeaves dehydration is higher, is subjected to the damp and hot time that influences shorter, has not only saved the energy, can improve quality of tea leaves again.So gas-gas normal temperature gravity type heat pipe heat exchanger is fit to Tea Processing very much.
Summary of the invention
The application of a kind of heat exchange of heat pipe of the present invention in Tea Processing should effectively utilize heat energy for the waste heat recovery field of Tea Processing with gas-gas normal temperature gravity type heat pipe heat exchanger, reduces the cost of production equipment.
The technical scheme that the present invention takes is: the application of a kind of heat exchange of heat pipe in Tea Processing, described heat exchange of heat pipe adopts gas-gas gravity type heat pipe heat exchanger, and described heat exchange of heat pipe is adopted and is installed in the deblock exhaust outlet top of machine, green-keeping machine or drying machine of hot blast.With pipeline the deblock exhaust outlet of machine of hot blast is connected with the hot fluid import of heat exchange of heat pipe, tail gas is through the evaporator section cooling of heat exchange of heat pipe, discharge from the hot fluid outlet of heat exchange of heat pipe, link to each other with exhaust blower with pipeline, the outlet from exhaust blower at last is connected to outdoor emptying; New wind then is after air cleaner is handled, enter the cold fluid import of heat exchange of heat pipe, the section of condensing heating through heat exchange of heat pipe, flow out from the cold fluid outlet of heat exchange of heat pipe, be connected to fresh air inlet (FAI by pipeline again, after pressurization, deliver to electric airheater, again through after further heating up, deliver to the deblock hot-wind inlet of machine of hot blast.
Described heat exchange of heat pipe adopts aluminium as heat pipe and fin material.
A kind of heat exchange of heat pipe is used for the waste heat recovery of Tea Processing.
The application of a kind of heat exchange of heat pipe of the present invention in Tea Processing, beneficial effect is as follows:
1, energy-saving effect is obvious: the thermal efficiency improves more than 48% on original basis at least.After the hot-air system of unit was further optimized, total thermal efficiency can also improve, and expectation can reach about 85%.
2, production efficiency improves: adopted the equipment of heat exchange of heat pipe to improve about 20% than its production efficiency of equipment that does not adopt heat exchange of heat pipe.Such as the unit that completes, used the simple bud of heat exchange of heat pipe to complete unit-hour output at 230kg/h, do not use the unit-hour output of heat exchange of heat pipe to be 180kg/h; Have a bud one leaf of heat exchange of heat pipe to complete at 250kg/h, the unit-hour output that does not have heat exchange of heat pipe is 200kg/h.
3, product quality is improved: because the processing conditions under the humid tropical condition is responsive especially to the quality influence of famous green tea.When temperature, humidity were all big simultaneously, the polyphenols in the tealeaves was easy to take place oxidation, is transformed into pigment materials such as theaflavin, congo red element in the production, made jaundice at the bottom of the soup look of green tea and the leaf, and is very big to the quality of tea leaves influence.The convection current situation of hot blast of the present invention is improved greatly, and the steam that produces in the production process is easy to be pulled away, so the dehydrating effect of tealeaves is very good, also can not produce the water sulks.Because the drying effect of equipment is good, the temperature precise control makes quality of tea leaves that guarantee arranged.
4, equipment drops into less: a 7m
2About 30,000 yuan of heat exchange of heat pipe, add pipeline, insulation and installing engineering, within 40,000 yuan.By the production in 1 year (annual only according to 3 first quarter moons calculating), only the electricity charge of Jie Yueing just are recoverable to equipment investment, and this does not also include tea leaf quality and improves the value-added part in back.
Description of drawings
Fig. 1 is gas of the present invention-gas gravity type heat pipe heat exchanger structure schematic diagram.
The specific embodiment
The application of a kind of heat exchange of heat pipe in Tea Processing, described heat exchange of heat pipe adopts gas-gas gravity type heat pipe heat exchanger, and described heat exchange of heat pipe is adopted and is installed in the deblock exhaust outlet top of machine, green-keeping machine or drying machine of hot blast.With pipeline the deblock exhaust outlet of machine of hot blast is connected with the hot fluid import of heat exchange of heat pipe, tail gas is through the evaporator section cooling of heat exchange of heat pipe, discharge from the hot fluid outlet of heat exchange of heat pipe, link to each other with exhaust blower with pipeline, the outlet from exhaust blower at last is connected to outdoor emptying; New wind then is after air cleaner is handled, enter the cold fluid import of heat exchange of heat pipe, the section of condensing heating through heat exchange of heat pipe, flow out from the cold fluid outlet of heat exchange of heat pipe, be connected to fresh air inlet (FAI by pipeline again, after pressurization, deliver to electric airheater, again through after further heating up, deliver to the deblock hot-wind inlet of machine of hot blast.
Described heat exchange of heat pipe adopts aluminium as heat pipe and fin material.
A kind of heat exchange of heat pipe is gas-gas gravity type heat pipe heat exchanger, is used for the waste heat recovery of Tea Processing.
Heat exchange of heat pipe of the present invention adopts gas-gas gravity type heat pipe heat exchanger, its structure by: insulation casing 4, finned heat pipe 2, dividing plate 3, hot fluid import 6, hot fluid outlet 7, cold fluid import 1, cold fluid outlet 5 etc. are formed, as shown in Figure 1.The specification of finned heat pipe 2: caliber is φ 24 * 2.5mm, and the fin diameter is φ 44mm, fin thickness 0.5mm, and the sheet spacing is 2.1mm.The arrangement form of heat pipe is fork row formula mode in the heat exchanger, and tube pitch is 52mm.Because Tea Processing does not have corrosivity, available aluminium is as heat pipe and fin material, and working medium then needs to select according to the heat exchange temperature.The open area of facining the wind of heat exchange of heat pipe is configured between 1.5～3.0m/s according to wind speed, and heat transfer coefficient is with 1500w/m2 ℃ of calculating.
In order to check the energy-saving effect behind the waste-heat recovery device of the present invention, in process of production, respectively to the new wind EAT that completes and hot blast deblocks, the temperature of heating back high-temperature hot-air, do not carry out the exhaust temperature of waste heat recovery, carry out the exhaust temperature after the waste heat recovery, parameters such as air draft air quantity are measured, and by correlation formula calculating, analyze heat recovery and thermal efficiency situation of change.Testing equipment and instrument: electric heating cylinder-hot air water-removing unit and the electric heating hot blast unit that deblocks, model is respectively: 6CST-80D and 6CJK-110D type.Wherein the cylindrical shell electrical heating power of green-keeping machine is that 116kw, hot blast electrical heating power are 32kw.The deblock electric airheater power of machine of hot blast is 150kw; The heat exchange of heat pipe of two waste heat recoveries is gas-gas gravity type normal temperature heat exchange of heat pipe, belongs to non-standard equipment, and heat exchange area is 7m2.Also comprise: temperature measuring instrument, anemobiagraph.
In the process of waste heat recovery, the heat of transmission can be similar to by formula and 1. calculate:
Q＝Cg×ρg×V×(T1-T2)……①
Formula 1. in Cg: the specific heat at constant pressure of air, look into the rerum natura table, in the time of 100 ℃ value 1.009kJ/kg ℃;
ρ g: the density of air, value 0.946kg/m3 in the time of 100 ℃;
V: the exhaust air rate of machine;
T1: the exhaust temperature that does not carry out waste heat recovery;
T2: carry out the exhaust temperature after the waste heat recovery.
In dry run, 2. the thermal efficiency of drying equipment by formula carry out approximate calculation
η＝(t1-t2)/(t1-t0)×100％……②
Formula is middle t1 2.: intake air temperature; T2: exhaust outlet temperature; T0: environment temperature
Test result:
Actual measurement electric heating cylinder-hot air water-removing operation, its exhaust emissions air quantity is 3700m
3/ h, the exhaust temperature that does not carry out waste heat recovery is 80 ℃, and the exhaust temperature that carries out the using waste heat from tail gas recovery is 49 ℃, and the hot blast wind pushing temperature is 146 ℃.1. calculate according to formula, then reclaim heat and be:
Q＝Cg×ρg×V×(T1-T2)……①
＝1.009×0.946×3700×(80-49)
＝109482.76kJ/h
The recyclable heat 106524kJ/h that per hour namely completes, amounting to into power consumption is 30.41kwh.Tea Production is counted according to the 12h working time average every day in season, but one day using electricity wisely 364.92kwh then; Economize 0.936 yuan/kwh of non-general electricity price for industrial uses meter according to certain, one day saves the electricity charge is 341.57 yuan.
Efficiency Calculation: hot blast temperature is 146 ℃ after the heating of actual measurement electric heating cylinder-hot air water-removing, and the exhaust temperature that does not carry out waste heat recovery is 80 ℃, carries out that the temperature of tail gas is 49 ℃ after the waste heat recovery, and the environment temperature in workshop is 20 ℃.2. calculate according to formula, when not carrying out waste heat recovery, the deblock thermal efficiency of operation of hot blast is:
η＝(t1-t2)/(t1-t0)×100％……②
＝(146-80)/(146-20)×100％
＝52.38％
After adopting heat exchange of heat pipe to carry out waste heat recovery, the thermal efficiency of electric heating cylinder-hot air water-removing operation is:
η＝(t1-t2)/(t1-t0)×100％……②
＝(146-49)/(146-20)×100％
＝76.98％
According to actual measurement, the exhaust air rate that hot blast deblocks is 2800m
3/ h, the exhaust temperature that does not carry out waste heat recovery is 103 ℃, the exhaust temperature that carries out the using waste heat from tail gas recovery is 50 ℃.1. calculate according to formula, then reclaim heat and be:
Q＝Cg×ρg×V×(T1-T2)……①
＝1.009×0.946×2800×(103-50)
＝141650kJ/h
I.e. recyclable heat 141650kJ/h per hour, amounting to into power consumption is 39.35kwh, Tea Production is counted according to the 12h working time average every day in season, but one day using electricity wisely 472.2kwh then; Non-general electricity price for industrial uses according to certain province is 0.936 yuan/kwh, and one day saves the electricity charge is 441.98 yuan.
Efficiency Calculation: hot blast temperature is 160 ℃ after the heating of deblocking of actual measurement hot blast, and the exhaust temperature that does not carry out waste heat recovery is 103 ℃, carries out that the temperature of tail gas is 50 ℃ after the waste heat recovery, and the environment temperature in workshop is 20 ℃.2. calculate according to formula, when not carrying out waste heat recovery, the deblock thermal efficiency of operation of hot blast is:
η＝(t1-t2)/(t1-t0)×100％……②
＝(160-103)/(160-20)×100％
＝40.71％
After adopting heat exchange of heat pipe to carry out waste heat recovery, the deblock thermal efficiency of operation of hot blast is:
η＝(t1-t2)/(t1-t0)×100％……②
＝(160-50)/(160-20)×100％
＝78.57％
After adopting the heat exchange of heat pipe recovery waste heat, the deblock thermal efficiency of unit of hot blast rises to 78.57% by 40.71%, and average one day using electricity wisely 472.2kwh amounts to 441.98 yuan of the electricity charge.
Claims (4)
1. the application of heat exchange of heat pipe in Tea Processing is characterized in that, described heat exchange of heat pipe adopts gas-gas gravity type heat pipe heat exchanger, and described heat exchange of heat pipe is adopted and is installed in the deblock exhaust outlet top of machine, green-keeping machine or drying machine of hot blast.
2. according to the application of the described a kind of heat exchange of heat pipe of claim 1 in Tea Processing, it is characterized in that, use pipeline the hot blast solution
The exhaust outlet of piece machine is connected with the hot fluid import (6) of heat exchange of heat pipe, tail gas is through the evaporator section cooling of heat exchange of heat pipe, discharge from the hot fluid outlet (7) of heat exchange of heat pipe, link to each other with exhaust blower with pipeline, the outlet from exhaust blower at last is connected to outdoor emptying;
New wind then is after air cleaner is handled, enter the cold fluid import (1) of heat exchange of heat pipe, the section of condensing heating through heat exchange of heat pipe, flow out from the cold fluid outlet (5) of heat exchange of heat pipe, be connected to fresh air inlet (FAI by pipeline again, after pressurization, deliver to electric airheater, again through after further heating up, deliver to the deblock hot-wind inlet of machine of hot blast.
3. according to claim 1 or 2 application of described a kind of heat exchange of heat pipe in Tea Processing, it is characterized in that described heat exchange of heat pipe adopts aluminium as heat pipe and fin material.
4. a heat exchange of heat pipe is used for the waste heat recovery of Tea Processing.
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| CN2013102068786A CN103283872A (en) | 2013-05-19 | 2013-05-19 | Application of heat pipe heat exchanger in tea processing |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104454455A (en) * | 2013-09-22 | 2015-03-25 | 洛阳蓝海实业有限公司 | Air compressor lubricating oil waste heat recovery heat pipe heat exchanger |
| CN105783539A (en) * | 2016-05-05 | 2016-07-20 | 张海娟 | Heat pipe type condenser |
| CN106087357A (en) * | 2016-06-27 | 2016-11-09 | 江苏科技大学 | A kind of dryer peculiar to vessel and control method |
| CN106152843A (en) * | 2016-08-26 | 2016-11-23 | 南京白云化工环境监测有限公司 | Low Temperature Steam waste-heat recovery device |
| CN111247385A (en) * | 2017-09-22 | 2020-06-05 | 霍尼韦尔国际公司 | Radiating pipe, method for transferring heat using radiating pipe, and heat transfer fluid for radiating pipe |
| CN112555237A (en) * | 2020-12-11 | 2021-03-26 | 中国石油大学(华东) | Vortex tube induced shock wave hydrate inhibition device |
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| CN201819468U (en) * | 2010-09-26 | 2011-05-04 | 李元吉 | Tea green-making environment control heat recovery energy-saving device |
| CN102940059A (en) * | 2012-11-27 | 2013-02-27 | 桂林电子科技大学 | Waste heat recovery device of tea dryer |
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2013
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201819468U (en) * | 2010-09-26 | 2011-05-04 | 李元吉 | Tea green-making environment control heat recovery energy-saving device |
| CN102940059A (en) * | 2012-11-27 | 2013-02-27 | 桂林电子科技大学 | Waste heat recovery device of tea dryer |
Non-Patent Citations (1)
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104454455A (en) * | 2013-09-22 | 2015-03-25 | 洛阳蓝海实业有限公司 | Air compressor lubricating oil waste heat recovery heat pipe heat exchanger |
| CN105783539A (en) * | 2016-05-05 | 2016-07-20 | 张海娟 | Heat pipe type condenser |
| CN106087357A (en) * | 2016-06-27 | 2016-11-09 | 江苏科技大学 | A kind of dryer peculiar to vessel and control method |
| CN106087357B (en) * | 2016-06-27 | 2018-05-01 | 江苏科技大学 | A kind of dryer peculiar to vessel and control method |
| CN106152843A (en) * | 2016-08-26 | 2016-11-23 | 南京白云化工环境监测有限公司 | Low Temperature Steam waste-heat recovery device |
| CN111247385A (en) * | 2017-09-22 | 2020-06-05 | 霍尼韦尔国际公司 | Radiating pipe, method for transferring heat using radiating pipe, and heat transfer fluid for radiating pipe |
| CN112555237A (en) * | 2020-12-11 | 2021-03-26 | 中国石油大学(华东) | Vortex tube induced shock wave hydrate inhibition device |
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Application publication date: 20130911 |