CN103486844A - Waste gas treatment and heat recovery method and system thereof for hot air drying device - Google Patents
Waste gas treatment and heat recovery method and system thereof for hot air drying device Download PDFInfo
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- CN103486844A CN103486844A CN201310398265.7A CN201310398265A CN103486844A CN 103486844 A CN103486844 A CN 103486844A CN 201310398265 A CN201310398265 A CN 201310398265A CN 103486844 A CN103486844 A CN 103486844A
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- air drying
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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 discloses a waste gas treatment and heat recovery method and a system thereof for a hot air drying device. Waste gas containing ketone benzene organic gas and vapor is discharged by the hot air drying device; constant temperature needed by the waste gas containing the ketone benzene organic gas and the vapor to generate hydroxy compound is provided by a constant-temperature heating device through constant-temperature heating; waste gas containing the hydroxy compound is generated; temperature needed by the waste gas containing the hydroxyl compound to carry out oxo synthesis reaction is provided by a high-temperature heating device through heating; hot air needed by the hot air drying device is formed by heating fresh air by strong heat release in the alcohol and vapor generating process of the oxo synthesis reaction; finally alcohol and vapor are discharged. In the process of carrying out harmless treatment on the organic waste gas discharged by the hot air drying device, thermal energy released by chemical reaction of the organic waste gas is fully recycled, and comprehensive utilization is realized while harmless treatment is carried out on the waste gas of the hot air drying device.
Description
Technical field
The present invention relates to technical field of waste gas treatment, especially relate to the exhaust-gas treatment that hot-air drying unit discharges.
Background technology
In industrial production, a lot of industrial products all will carry out drying and processing, dry organic solvent and the moisture that will use aborning.Drying unit is hot-air drying unit commonly, utilizes hot blast in certain space, workpiece to be dried, and commonly used have drying road type and a bake oven type c.Hot-air drying unit can produce a large amount of organic exhaust gas and steam in the course of the work, and the organic exhaust gas of traditional hot-air drying unit is direct discharge, causes atmosphere pollution, and most organic exhaust gas is harmful.
In order to reduce the discharge of harmful organic exhaust gas, the regulation relevant industries will be processed waste gas.At present, the exhaust-gas treatment of hot-air drying unit can only be to accomplish simple harmless treatment, can't realize the comprehensive utilization in waste gas treatment process.Compound in organic exhaust gas contains a large amount of chemical energy, during current simple organic exhaust gas harmless treatment, can not realize reclaiming to the energy of this form, therefore, can not accomplish the abundant comprehensive utilization of waste gas.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind ofly can carry out the waste gas of hot-air drying unit innoxiously, can realize again method and the system thereof of comprehensive utilization simultaneously.
For solving the problems of the technologies described above adopted technical scheme: a kind of exhaust-gas treatment for hot-air drying unit and heat recovery method comprise the following steps:
One, hot-air drying unit is dried the production workpiece that includes ketone benzene class organic solvent, discharges the waste gas that contains ketone benzene class organic gas and steam simultaneously;
Two, constant temperature heating device receives the waste gas that hot-air drying unit is discharged, and by heated at constant temperature, provides the waste gas that includes ketone benzene class organic gas and steam to generate the required steady temperature of hydroxy compounds simultaneously, generates the waste gas that contains hydroxy compounds simultaneously;
Three, high-temperature heating equipment receives the waste gas that constant temperature heating device is discharged, by heating, provide the waste gas of interior hydroxy-containing compounds to carry out the required temperature of carbongl group synthesis reaction simultaneously, utilize carbongl group synthesis reaction to generate strong heat release in the process of alcohol and water steam and heat new air and form the required hot blast of hot-air drying unit, finally the alcohol and water vapor exhaust is bled off.
On the basis of the above, the waste gas that waste gas adopted the dust removal by filtration device to emit hot-air drying unit before being transported to constant temperature heating device carries out dust removal and filtration.
On the basis of the above, utilize the heat-exchange device waste heat recovery that the alcohol and water steam of high-temperature heating equipment discharge is contained to the conveyance conduit between dust removal by filtration device and constant temperature heating device.
For solving the problems of the technologies described above adopted another technical scheme: a kind of exhaust-gas treatment for hot-air drying unit and heat recovery system that adopts said method, include hot-air drying unit, constant temperature heating device and high-temperature heating equipment, it is characterized in that: described hot-air drying unit, constant temperature heating device and high-temperature heating equipment are in turn connected into a circulatory system by conveyance conduit.
On the basis of the above, be connected with the dust removal by filtration device between described hot-air drying unit and constant temperature heating device.
On the basis of the above, between described dust removal by filtration device and constant temperature heating device, be connected with heat-exchange device, the discharge tube of the alcohol and water steam of high-temperature heating equipment is through in heat-exchange device as the heat-exchange tube cover.
The beneficial effect that adopts the present invention to bring: the present invention is in the organic exhaust gas that hot-air drying unit is discharged carries out the process of harmless treatment, fully reclaim the heat energy that the organic exhaust gas chemical reaction discharges, can realize again comprehensive utilization when can carry out harmless treatment to the waste gas of hot-air drying unit, realize energy-saving and emission-reduction truly.
The accompanying drawing explanation
Fig. 1 is the structural representation of the present invention for exhaust-gas treatment and the heat recovery system of hot-air drying unit.
The specific embodiment
As shown in Figure 1, a kind of exhaust-gas treatment for hot-air drying unit and heat recovery system that adopts said method, include hot-air drying unit 1, constant temperature heating device 2 and high-temperature heating equipment 3, described hot-air drying unit 1, constant temperature heating device 2 and high-temperature heating equipment 3 are in turn connected into a circulatory system by conveyance conduit 4.
The production workpiece that 1 pair of hot-air drying unit includes ketone benzene class organic solvent is dried, and discharges the waste gas that contains ketone benzene class organic gas and steam simultaneously; Constant temperature heating device 2 receives the waste gas that hot-air drying unit 1 is discharged, and by heated at constant temperature, provides the waste gas that includes ketone benzene class organic gas and steam to generate the required steady temperature of hydroxy compounds simultaneously, generates the waste gas that contains hydroxy compounds simultaneously; High-temperature heating equipment 3 receives the waste gas that constant temperature heating device 2 is discharged, by heating, provide the waste gas of interior hydroxy-containing compounds to carry out the required temperature of carbongl group synthesis reaction simultaneously, utilize carbongl group synthesis reaction to generate strong heat release in the process of alcohol and water steam and heat new air and form the required hot blast of hot-air drying unit 1, finally the alcohol and water vapor exhaust is bled off.
Here take the organic exhaust gas butanone as example: butanone is at constant temperature heating device 2 through 250 degree heated at constant temperature, and methyl-2-hydroxyl fourth is stupid to generate 2-; Product generates 2-a series of process products such as methyl isophthalic acid-rare base fourth is stupid, the rare base fourth in 2-methyl-2 is stupid, the rare base third in 2-ethyl-2 is stupid at high-temperature heating equipment 3 through 300-400 degree high-temperature heating, and end product is the alcohol and water steam.Butanone is through strong heat release discharge the alcohol and water steam after the carbongl group synthesis reaction of series of complex.
In constant temperature heating device 2, can carry out heated at constant temperature with heated at constant temperature equipment such as electric heating, the temperature of constant temperature is regulated according to the chemical composition of organic gas, the temperature difference that different chemical compositions is required, and temperature maintains and can make waste gas fully react the generation hydroxy compounds.
In high-temperature heating equipment 3, can heat with traditional firing equipments such as burner or electrothermal furnaces, provide the waste gas that contains hydroxy compounds fully to carry out the required high temperature of carbongl group synthesis reaction.
The waste gas of discharging from hot-air drying unit 1 mostly contains impurity, therefore, can between hot-air drying unit 1 and constant temperature heating device 2, be connected with dust removal by filtration device 5, utilizes dust removal by filtration device 5 by the contaminant filter in waste gas out.
Because the alcohol and water steam given off from high-temperature heating equipment 3 contains a large amount of waste heats, therefore, can between dust removal by filtration device 5 and constant temperature heating device 2, be connected with heat-exchange device.Concrete, can directly overlap in the conveyance conduit 4 be through between dust removal by filtration device 5 and constant temperature heating device 2 discharge tube 6 of the alcohol and water steam of high-temperature heating equipment 3 as heat-exchange tube, discharge tube 6 conveyance conduits 4 that wear together form heat-exchange device.
Claims (6)
1. the exhaust-gas treatment for hot-air drying unit and heat recovery method comprise the following steps:
One, hot-air drying unit is dried the production workpiece that includes ketone benzene class organic solvent, discharges the waste gas that contains ketone benzene class organic gas and steam simultaneously;
Two, constant temperature heating device receives the waste gas that hot-air drying unit is discharged, and by heated at constant temperature, provides the waste gas that includes ketone benzene class organic gas and steam to generate the required steady temperature of hydroxy compounds simultaneously, generates the waste gas that contains hydroxy compounds simultaneously;
Three, high-temperature heating equipment receives the waste gas that constant temperature heating device is discharged, by heating, provide the waste gas of interior hydroxy-containing compounds to carry out the required temperature of carbongl group synthesis reaction simultaneously, utilize carbongl group synthesis reaction to generate strong heat release in the process of alcohol and water steam and heat new air and form the required hot blast of hot-air drying unit, finally the alcohol and water vapor exhaust is bled off.
2. the exhaust-gas treatment for hot-air drying unit according to claim 1 and heat recovery method, it is characterized in that: the waste gas that waste gas adopted the dust removal by filtration device to emit hot-air drying unit before being transported to constant temperature heating device carries out dust removal and filtration.
3. the exhaust-gas treatment for hot-air drying unit according to claim 2 and heat recovery system, is characterized in that: utilize the heat-exchange device waste heat recovery that the alcohol and water steam of high-temperature heating equipment discharge is contained to the conveyance conduit between dust removal by filtration device and constant temperature heating device.
4. the exhaust-gas treatment for hot-air drying unit and a heat recovery system that adopts claim 1 method, include hot-air drying unit, constant temperature heating device and high-temperature heating equipment, it is characterized in that: described hot-air drying unit, constant temperature heating device and high-temperature heating equipment are in turn connected into a circulatory system by conveyance conduit.
5. the exhaust-gas treatment for hot-air drying unit according to claim 4 and heat recovery system, is characterized in that: be connected with the dust removal by filtration device between described hot-air drying unit and constant temperature heating device.
6. the exhaust-gas treatment for hot-air drying unit according to claim 5 and heat recovery system, it is characterized in that: be connected with heat-exchange device between described dust removal by filtration device and constant temperature heating device, the discharge tube of the alcohol and water steam of high-temperature heating equipment is through in heat-exchange device as the heat-exchange tube cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310398265.7A CN103486844B (en) | 2013-09-04 | 2013-09-04 | For the exhaust-gas treatment of hot-air drying unit and heat recovery method and system thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310398265.7A CN103486844B (en) | 2013-09-04 | 2013-09-04 | For the exhaust-gas treatment of hot-air drying unit and heat recovery method and system thereof |
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| CN103486844A true CN103486844A (en) | 2014-01-01 |
| CN103486844B CN103486844B (en) | 2016-01-06 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3801264A (en) * | 1972-04-24 | 1974-04-02 | Heil Co | Dehydrating system with exhaust gas recycling |
| CN101011692A (en) * | 2006-12-08 | 2007-08-08 | 黄桂清 | Environment friendly and energy saving method and device for coat dying of continuous paint baking |
| CN101745198A (en) * | 2008-12-13 | 2010-06-23 | 王永 | Treatment method of residue generated in purification of industrial pentachlorophenol |
| CN101774654A (en) * | 2009-01-08 | 2010-07-14 | 重庆宁寰再生资源开发有限责任公司 | Treatment device of waste liquid/slag |
| CN101881553A (en) * | 2010-06-22 | 2010-11-10 | 上海联净环保科技有限公司 | Catalytic combustion heat recovery system and method |
| CN203443311U (en) * | 2013-09-04 | 2014-02-19 | 张利华 | Waste gas treatment and heat recovery system for hot air drying device |
-
2013
- 2013-09-04 CN CN201310398265.7A patent/CN103486844B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3801264A (en) * | 1972-04-24 | 1974-04-02 | Heil Co | Dehydrating system with exhaust gas recycling |
| CN101011692A (en) * | 2006-12-08 | 2007-08-08 | 黄桂清 | Environment friendly and energy saving method and device for coat dying of continuous paint baking |
| CN101745198A (en) * | 2008-12-13 | 2010-06-23 | 王永 | Treatment method of residue generated in purification of industrial pentachlorophenol |
| CN101774654A (en) * | 2009-01-08 | 2010-07-14 | 重庆宁寰再生资源开发有限责任公司 | Treatment device of waste liquid/slag |
| CN101881553A (en) * | 2010-06-22 | 2010-11-10 | 上海联净环保科技有限公司 | Catalytic combustion heat recovery system and method |
| CN203443311U (en) * | 2013-09-04 | 2014-02-19 | 张利华 | Waste gas treatment and heat recovery system for hot air drying device |
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