CN101829649A - Drying oven for spraying - Google Patents

Drying oven for spraying Download PDF

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Publication number
CN101829649A
CN101829649A CN201010183462A CN201010183462A CN101829649A CN 101829649 A CN101829649 A CN 101829649A CN 201010183462 A CN201010183462 A CN 201010183462A CN 201010183462 A CN201010183462 A CN 201010183462A CN 101829649 A CN101829649 A CN 101829649A
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CN
China
Prior art keywords
exhaust gas
drying oven
spraying
communicated
return air
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Pending
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CN201010183462A
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Chinese (zh)
Inventor
吕建立
吴海珍
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ZHEJIANG HUALI COATING EQUIPMENT CO Ltd
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ZHEJIANG HUALI COATING EQUIPMENT CO Ltd
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Priority to CN201010183462A priority Critical patent/CN101829649A/en
Publication of CN101829649A publication Critical patent/CN101829649A/en
Pending legal-status Critical Current

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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
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working

Abstract

The invention relates to a drying oven for spraying, which comprises a drying passage and an exhaust gas incinerator. The drying passage is communicated with the exhaust gas incinerator through an exhaust gas pipeline and an air return pipeline; the wall of the drying passage is provided with an air return outlet, an exhaust gas inlet and an air return inlet; the exhaust gas inlet is communicated with the exhaust gas pipeline; the air return inlet and the air return outlet are communicated with the air return pipeline respectively; the exhaust gas incinerator comprises a heat exchanger which is communicated with the air return pipeline, and a preheater and an incineration chamber which are communicated with the exhaust gas pipeline; and the inlet of the incineration chamber is communicated with the outlet of the preheater, and the outlet of the incineration chamber is communicated with the inlet of the heat exchanger. The drying oven saves a large amount of equipment investment; an exhaust gas heat energy recovery and heat exchange process is introduced based on a hot blast stove with an original drying passage, and the heat energy generated by incinerated exhaust gas is fully utilized, so the heat energy recovery rate is high, energy resources required by the drying oven and the incinerator are greatly saved, and the operating cost is reduced; and the drying oven has the advantages of high exhaust gas treatment efficiency, high incineration temperature, complete exhaust gas decomposition and high purifying rate.

Description

A kind of drying oven for spraying
Technical field
The present invention relates to a kind of spraying drying unit, relate in particular to the drying oven for spraying of a kind of integrated exhaust gas burning and heat-energy recovering apparatus.
Background technology
Surface of the work is handled and is adopted spraying technology mostly, as spray paint and plastic-blasting, most spray liniment all needs to be cured by heating after spraying, and spray liniment all can give out waste gas in heating process, these waste gas comprise the organic compound of gaseous state, as benzene, dimethylbenzene etc., has stronger toxicity, as not handling, be discharged in the air and not only can produce extremely bad influence staff's health, also can atmosphere pollution, therefore setting up spray-painting production line must install emission-control equipment additional.Emission-control equipment in the market adheres to different industries separately with the spraying drying unit, by different manufacturer production, this has just caused the input of equipment when going into operation excessive, and the equipment of different manufacturers production when mounted difficulty cooperate, easily cause wherein equipment capacity superfluous and waste.Emission-control equipment is handled the mode that the more employing of organic waste gas is burned, and can produce a large amount of heats in the burning process, is installed separately as drying oven and waste gas combustion furnace, and a large amount of heats that then produce in the waste gas treatment process can be wasted.
Summary of the invention
The present invention solves prior art problems, discloses the drying oven for spraying of a kind of integrated exhaust gas burning and heat-energy recovering apparatus.
Technical scheme of the present invention: a kind of drying oven for spraying, comprise drying tunnel, it is characterized in that: it also comprises waste gas combustion furnace; Described drying tunnel is connected with waste gas combustion furnace by exhaust piping and return air duct; The drying tunnel wall is provided with return air outlet, exhaust gas entrance and return air inlet, and exhaust gas entrance is connected with exhaust piping, and return air inlet and return air outlet are connected with return air duct respectively; Described waste gas combustion furnace comprises the heat exchanger that is connected with return air duct, the preheater that is connected with exhaust piping and Burning Room, and the inlet of Burning Room is connected with the outlet of preheater, and the outlet of Burning Room is connected with the inlet of heat exchanger.
The curing that common spray liniment needs need be heated, workpiece heats in drying tunnel, the spray liniment of surface of the work produces organic waste gas, these gases are detached drying tunnel from exhaust gas entrance, enter waste gas combustion furnace by exhaust piping, enter Burning Room after the preheating of waste gas process preheater and burn, produce a large amount of heats simultaneously, the processing of high temperature gas is later discharged through over-heat-exchanger behind all burnt; Simultaneously, the gas that temperature is lower in the drying tunnel is entered by the return air inlet, enters heat exchanger by return air duct, after the heating of the gas after the processing of high temperature, again via return air duct, gets back to drying tunnel from the return air outlet, the gas in the heating drying tunnel.
As preferably, described drying tunnel outer wall also is provided with wind-supplying mouth.After waste gas in the drying tunnel was drawn out of processing, gas reduced in the drying tunnel, produced negative pressure, carried out replenish air by wind-supplying mouth, kept the drying tunnel inside and outside air pressure balance.
As preferably, described drying tunnel inside is provided with hygrosensor.Hygrosensor is used to grasp the curing baking temperature of workpiece in the drying tunnel.
As preferably, described waste gas combustion furnace is communicated with heat exchange blast pipe and straight-through blast pipe, and described straight-through blast pipe is communicated with the inlet of heat exchanger, and described heat exchange blast pipe is communicated with the outlet of heat exchanger; Described heat exchange blast pipe and straight-through blast pipe are provided with switch valve, and described switch valve is controlled by described hygrosensor.
By the reading of hygrosensor, temperature is lower in drying tunnel, opens the switch valve on the heat exchange blast pipe, close the switch valve on the straight-through blast pipe, high-temperature gas passes heat exchanger after the burning will be sent drying tunnel back to after will heating from the gas that return air duct injects, and the gas in the drying tunnel is heated; Temperature in drying tunnel reaches the requirement of solidification temperature, when not needing again the gas in the drying tunnel to be heated, close the switch valve on the heat exchange blast pipe, open the switch valve on the straight-through blast pipe, high-temperature gas after the burning is directly discharged from straight-through blast pipe, without heat exchanger, do not heat the gas that injects from return air duct.
As preferably, the outlet of described switch valve is connected with total air escape pipe, and described total air escape pipe is connected with hot water storgae.Even the gas after the burning through over-heat-exchanger, after the heating of the gas in the drying tunnel, still has higher temperature, through total air escape pipe the water in the hot water storgae is heated, produce hot water, further reclaim heat energy.
As preferably, described exhaust gas entrance has three, is arranged at the two ends and the middle part on drying tunnel top respectively.The exhaust gas entrance of being located at everywhere fully extracts the interior waste gas of drying tunnel, and exhaust-gas treatment is more thorough.
As preferably, described drying tunnel inside is provided with the workpiece track.
As preferably, described return air outlet has several, is uniformly distributed in the below of described workpiece track.
All workpiece that need solidify are hung on the workpiece track, inject drying tunnel through the gas after the heating from the return air outlet, evenly blow to all surface of the works, make stable, the intensification equably of workpiece, because being arranged at, the principle that hot-air rises, return air outlet can make the workpiece heating rapider, even under the workpiece.
As preferably, described two switch valves link mutually.Two switch valves link mutually, make two switch valves open the specified capacity that sum is a blast pipe, when temperature stabilization in the drying tunnel rises, reduce the switch valve of heat exchange blast pipe, increase the switch valve of straight-through blast pipe, reduce to enter the amount of high-temperature gas in the heat exchanger, slow down heating the return air duct injecting gas; Otherwise, then strengthen heating to the return air duct injecting gas.
In sum, the present invention has the following advantages:
1, saves equipment investment in a large number;
2, heat energy recovery rate height, introduce heat energy from waste gas recovery, heat-exchanging process on the hot-blast stove basis of original drying tunnel, make full use of the heat energy of the waste gas generation of burning, heat energy recovery rate is quite high, greatly save the energy that drying oven and incinerator need, reduced operating cost;
3, exhaust-gas treatment efficient height, the incineration temperature height, waste gas decomposes fully, and purifying rate is high.
Description of drawings
Fig. 1 is a schematic diagram of the present invention.
Among the figure, 1, drying tunnel, 2, exhaust gas entrance, 3, the workpiece track, 4, waste gas combustion furnace, 5, Burning Room, 6, heat exchanger, 7, preheater, 8, return air duct, 9, exhaust piping, 10, the return air inlet, 11, return air outlet, 12, straight-through blast pipe, 13, the heat exchange blast pipe, 14, switch valve, 15, hot water storgae, 16, workpiece, 17, hygrosensor, 18, wind-supplying mouth, 19, total air escape pipe.
The specific embodiment
The invention will be further described with embodiment below in conjunction with accompanying drawing.
A kind of drying oven for spraying comprises drying tunnel 1 and waste gas combustion furnace 4; Described drying tunnel 1 is connected with waste gas combustion furnace 4 by exhaust piping 9 and return air duct 8; Drying tunnel 1 wall is provided with 11, three exhaust gas entrances 2 of several return air outlets, return air inlet 10 and wind-supplying mouth 18, and drying tunnel 1 inside is provided with hygrosensor 17, and described exhaust gas entrance 2 is arranged at the two ends and the middle part on drying tunnel 1 top respectively; Exhaust gas entrance 2 is connected with exhaust piping 9 by air exhauster, and return air inlet 10 and return air outlet 11 are connected with return air duct 8 respectively; Described waste gas combustion furnace 4 comprises the heat exchanger 6 that is connected with return air duct 8, the preheater 7 that is connected with exhaust piping 9 and Burning Room 5, the inlet of Burning Room 5 is connected with the outlet of preheater 7, the outlet of Burning Room 5 is connected with the inlet of heat exchanger 6, waste gas combustion furnace 4 is communicated with heat exchange blast pipe 13 and straight-through blast pipe 12, described straight-through blast pipe 12 is communicated with the inlet of heat exchanger 6, and described heat exchange blast pipe 13 is communicated with the outlet of heat exchanger 6; Described heat exchange blast pipe 13 and straight-through blast pipe 12 are provided with the 14 mutual interlocks of 14, two switch valves of switch valve and are controlled by described hygrosensor 17; The outlet of described switch valve 14 is connected with total air escape pipe 19, and described total air escape pipe 19 is connected with hot water storgae 15.Described drying tunnel 1 inside is provided with workpiece track 3, and return air outlet 11 is uniformly distributed in the below of described workpiece track 3.
Workpiece 16 after the spraying is positioned on the workpiece track 3, and the spray liniment solidification temperature on workpiece 16 surfaces needs 150～200 degrees centigrade approximately.During curing, at first begin drying tunnel 1 heating, when workpiece 16 is heated, the sprayed coating on workpiece 16 surfaces begins to discharge waste gas, waste gas is gathered by the exhaust gas entrance 2 on drying tunnel 1 top, send into the preheater 7 of waste gas combustion furnace through exhaust piping 9, carry out burning disposal through entering Burning Room 5 after the preheating, incineration temperature can reach 750 degrees centigrade, gas after the burning disposal is discharged from the outlet of Burning Room 5, enters heat exchanger 6 and carries out heat exchange, and the cooling back enters the tracheae of hot water storgae 15 inside by switch valve and total air escape pipe 19, after amount of residual heat will in the gas was absorbed by the water in the hot water storgae 15, gas was arranged to atmosphere; Simultaneously, temperature is lower in the drying tunnel 1, also do not reach 200 degrees centigrade of the temperature upper limits that workpiece 16 surface cures need, the air that temperature is lower enters from return air inlet 10, through return air duct 8, enters the heat exchanger 6 of incinerator 4, the high-temperature gas of handling with incinerator 4 carries out heat exchange, be heated, send drying tunnel 1 back to by return air duct 8 then, the workpiece 16 in the drying tunnel 1 is heated; During 200 degrees centigrade of temperature upper limits that arrive to need when temperature in the drying tunnel 1, do not need again drying tunnel 1 inside to be heated, hygrosensor 17 gauge tap valves, close heat exchange blast pipe 13, open straight-through blast pipe 12, the high-temperature gas that incinerator 4 was handled directly enters the tracheae of hot water storgae 15 inside via straight-through blast pipe 12 and total air escape pipe 19, without heat exchanger 6.
Add 5000m with drying oven 3The waste gas combustion furnace of/h is an example, independently the waste gas combustion furnace of relevant specification need be invested more than 800,000 yuan approximately, and installation electric power 95KW uses heavily about 3.1 tons of metal, and integrated burned waste gas and heat-energy recovering apparatus only need to invest about about 300,000 yuan, use about 0.8 ton of metal.Through actual measurement, behind integrated exhaust gas incinerator and the heat-energy recovering apparatus, through the secondary energy recovery, the rate of recovery of heat energy can reach more than 90%, and the incineration temperature of waste gas is up to 600～900 degrees centigrade in the waste gas combustion furnace, and purification efficiency is high, can reach more than 95%.
Embodiment two
Be that with the difference of embodiment one incineration temperature can reach 850 degrees centigrade.

Claims (9)

1. a drying oven for spraying comprises drying tunnel (1), it is characterized in that: it also comprises waste gas combustion furnace (4); Described drying tunnel (1) is connected with waste gas combustion furnace (4) by exhaust piping (9) and return air duct (8); Drying tunnel (1) wall is provided with return air outlet (11), exhaust gas entrance (2) and return air inlet (10), and exhaust gas entrance (2) is connected with exhaust piping (9), and return air inlet (10) and return air outlet (11) are connected with return air duct (8) respectively; Described waste gas combustion furnace (4) comprises the heat exchanger (6) that is connected with return air duct (8), the preheater (7) that is connected with exhaust piping (9) and Burning Room (5), the inlet of Burning Room (5) is connected with the outlet of preheater (7), and the outlet of Burning Room (5) is connected with the inlet of heat exchanger (6).
2. according to the described drying oven for spraying of claim 1, it is characterized in that: also be provided with wind-supplying mouth (18) on described drying tunnel (1) wall.
3. according to the described drying oven for spraying of claim 1, it is characterized in that: described drying tunnel (1) inside is provided with hygrosensor (17).
4. according to the described drying oven for spraying of claim 3, it is characterized in that: described waste gas combustion furnace (4) is communicated with heat exchange blast pipe (13) and straight-through blast pipe (12), described straight-through blast pipe (12) is communicated with the inlet of heat exchanger (6), and described heat exchange blast pipe (13) is communicated with the outlet of heat exchanger (6); Described heat exchange blast pipe (13) and straight-through blast pipe (12) are provided with switch valve (14), and described switch valve (14) is controlled by described hygrosensor (17).
5. according to the described drying oven for spraying of claim 4, it is characterized in that: the outlet of described switch valve (14) is connected with total air escape pipe (19), and described total air escape pipe (19) is connected with hot water storgae (15).
6. according to claim 1 or 5 described drying oven for spraying, it is characterized in that: described exhaust gas entrance (2) has three, is arranged at the two ends and the middle part on drying tunnel (1) top respectively.
7. according to the described drying oven for spraying of claim 1, it is characterized in that: described drying tunnel (1) inside is provided with workpiece track (3).
8. according to the described drying oven for spraying of claim 7, it is characterized in that: described return air outlet (11) has several, is uniformly distributed in the below of described workpiece track (3).
9. according to the described drying oven for spraying of claim 4, it is characterized in that: described two switch valves (14) are interlock mutually.
CN201010183462A 2010-05-26 2010-05-26 Drying oven for spraying Pending CN101829649A (en)

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102235814A (en) * 2011-04-20 2011-11-09 江苏剑桥涂装工程有限公司 Direct-combustion hot blast heater
CN102423750A (en) * 2011-10-24 2012-04-25 镇江市万源电子有限公司 Energy-saving environmental-friendly gas heating system of curing tunnel of coating machine
CN103062994A (en) * 2013-01-29 2013-04-24 无锡正怡涂装环保机械有限公司 Fuel gas heating drying tunnel
CN103822455A (en) * 2014-02-21 2014-05-28 泰山石膏股份有限公司 Heat recovery system of gypsum board drying exhaust steam filling tower
CN105509457A (en) * 2016-01-22 2016-04-20 历升涂装设备(南京)有限公司 Multielement recirculation furnace with function of waste gas backdraft incineration
CN105964448A (en) * 2016-07-19 2016-09-28 浙江捷洋科技有限公司 Automatic paint spraying device
CN108644794A (en) * 2018-05-13 2018-10-12 佛山市佳威节能环保设备有限公司 A kind of improvement VOCs systems
CN109127323A (en) * 2018-09-30 2019-01-04 中国汽车工业工程有限公司 A kind of Two-way Cycle drying system
CN115518853A (en) * 2022-09-14 2022-12-27 浙江日鼎涂装科技有限公司 Air heat exchange structure of heating chamber

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5333395A (en) * 1992-08-07 1994-08-02 Vits Maschinenbau Gmbh Drying apparatus
US6418636B1 (en) * 1999-08-11 2002-07-16 Eisermann Maschinenbau Kg Drier for a lacquering line
CN1517589A (en) * 2003-01-18 2004-08-04 江西昌河汽车股份有限公司合肥分公司 Waste gas treatment system for paint drying oven
CN1739868A (en) * 2005-07-14 2006-03-01 中冶连铸技术工程股份有限公司 Steel belt coating stoving method and apparatus
CN101221010A (en) * 2008-01-23 2008-07-16 东莞丰裕电机有限公司 Environment protection energy-saving equipment for waste gas burning and residual heat utilization
CN201368462Y (en) * 2009-03-02 2009-12-23 江阴天虹板业有限公司 Device for recycling tail gas of baking varnish from colored steel production line
CN201684712U (en) * 2010-05-26 2010-12-29 浙江华立涂装设备有限公司 Spraying drying furnace

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5333395A (en) * 1992-08-07 1994-08-02 Vits Maschinenbau Gmbh Drying apparatus
US6418636B1 (en) * 1999-08-11 2002-07-16 Eisermann Maschinenbau Kg Drier for a lacquering line
CN1517589A (en) * 2003-01-18 2004-08-04 江西昌河汽车股份有限公司合肥分公司 Waste gas treatment system for paint drying oven
CN1739868A (en) * 2005-07-14 2006-03-01 中冶连铸技术工程股份有限公司 Steel belt coating stoving method and apparatus
CN101221010A (en) * 2008-01-23 2008-07-16 东莞丰裕电机有限公司 Environment protection energy-saving equipment for waste gas burning and residual heat utilization
CN201368462Y (en) * 2009-03-02 2009-12-23 江阴天虹板业有限公司 Device for recycling tail gas of baking varnish from colored steel production line
CN201684712U (en) * 2010-05-26 2010-12-29 浙江华立涂装设备有限公司 Spraying drying furnace

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102235814A (en) * 2011-04-20 2011-11-09 江苏剑桥涂装工程有限公司 Direct-combustion hot blast heater
CN102235814B (en) * 2011-04-20 2013-10-30 江苏剑桥涂装工程有限公司 Direct-combustion hot blast heater
CN102423750A (en) * 2011-10-24 2012-04-25 镇江市万源电子有限公司 Energy-saving environmental-friendly gas heating system of curing tunnel of coating machine
CN103062994A (en) * 2013-01-29 2013-04-24 无锡正怡涂装环保机械有限公司 Fuel gas heating drying tunnel
CN103822455A (en) * 2014-02-21 2014-05-28 泰山石膏股份有限公司 Heat recovery system of gypsum board drying exhaust steam filling tower
CN105509457A (en) * 2016-01-22 2016-04-20 历升涂装设备(南京)有限公司 Multielement recirculation furnace with function of waste gas backdraft incineration
CN105964448A (en) * 2016-07-19 2016-09-28 浙江捷洋科技有限公司 Automatic paint spraying device
CN105964448B (en) * 2016-07-19 2018-08-28 浙江捷洋科技有限公司 A kind of auto spray painting device
CN108644794A (en) * 2018-05-13 2018-10-12 佛山市佳威节能环保设备有限公司 A kind of improvement VOCs systems
CN109127323A (en) * 2018-09-30 2019-01-04 中国汽车工业工程有限公司 A kind of Two-way Cycle drying system
CN115518853A (en) * 2022-09-14 2022-12-27 浙江日鼎涂装科技有限公司 Air heat exchange structure of heating chamber

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Application publication date: 20100915