CN103673564B - A kind of heat-wind circulate drying system using gas circulating purification system - Google Patents
A kind of heat-wind circulate drying system using gas circulating purification system Download PDFInfo
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- CN103673564B CN103673564B CN201310642696.3A CN201310642696A CN103673564B CN 103673564 B CN103673564 B CN 103673564B CN 201310642696 A CN201310642696 A CN 201310642696A CN 103673564 B CN103673564 B CN 103673564B
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Abstract
The invention discloses a kind of heat-wind circulate drying system using gas circulating purification system, comprise an indirect heating type hot air circulation equipment; It is a kind of for will the high-temperature gas process of VOC be contained and the gas circulating purification system recycled; One for the air supply system according to temperature moderating stream amount; Indirect heating type hot air circulation equipment gas outlet connects with gas circulating purification system, and gas after treatment enters indirect heating type hot air circulation equipment again and carries out drying after air supply system regulates.The present invention makes full use of recyclegas heat and imflammable gas decomposes the heat produced, and while lifting drying process process safety, reaches energy-conservation object.
Description
Technical field
The present invention relates to a kind of drying system, particularly a kind of heat-wind circulate drying system using gas circulating purification system.
Background technology
Heated-air drying equipment be widely used in industrial products dry run.Its major advantage is to utilize the hot-air of flowing to circulate in dry run, significantly raises the efficiency and reduces energy consumption, having higher economic implications.
Two classes are had at present: the first kind is to special heated-air drying equipment research and development, makes it be more suitable for certain product dry in the patent main direction of studying of heated-air drying equipment; Equations of The Second Kind be by change drying equipment structure or introduce circulation wait measure, raising equipment dry heat utilization rate, minimizing after-heat discharge, reduce costs.And it is little to the security transformation of heated-air drying equipment.
In fact, in dry run, the coating of product surface easily produces inflammable organic gas, and circulation hot blast in accumulation and concentration constantly raises, when gas concentration reaches its LEL, easily produce explosion accident, cause casualties and property loss.In recent years, the explosion accident of China's drying equipment with hot-air circulation happened occasionally.
In production, for preventing blasting in dry run, the remodeling method for dry run mainly contains two kinds: one is added with to add air, controls the concentration of inflammable organic gas, but this method needs constantly to heat air, the serious waste energy; One is by installing electrical explosion proof equipment additional, but due to the complexity of whole system and the diversity of the reason that causes explosion accident to occur, makes this method inherently to avoid accident to occur.
Summary of the invention
The shortcoming that the object of the invention is to overcome prior art, with not enough, provides the method and apparatus adding gas circulating purification system in a kind of drying cycles, solves in actual production, to use heat-wind circulate drying system easily to blast the problem of accident.
Object of the present invention is achieved through the following technical solutions:
Use a heat-wind circulate drying system for gas circulating purification system, comprise an indirect heating type hot air circulation equipment; It is a kind of for will the high-temperature gas process of VOC be contained and the gas circulating purification system recycled; One for the air supply system according to temperature moderating stream amount; Indirect heating type hot air circulation equipment gas outlet connects with gas circulating purification system, and gas after treatment enters indirect heating type hot air circulation equipment again and carries out drying after air supply system regulates.
Described indirect heating type hot air circulation equipment comprises drying chamber, drying chamber air inlet, drying chamber exhaust outlet, explosion-proof decompression device, temperature detection device, safety flare, electric calorifie installation, circulating fan; Air heat in drying chamber is extremely applicable to dry temperature by described electric calorifie installation, circulating fan drives the recyclegas in drying chamber to enter gas circulating purification system from exhaust outlet, gas after treatment reenters in tank from drying chamber air inlet again, participates in dry run.
Described gas circulating purification system bag inlet non-return valve, moisture separator, draining valve, deduster, gas flowmeter, air inlet spark arrester, insulation fix bed catalytic oxidizer, operated pneumatic valve, condenser, tail gas tower, gas outlet spark arrester, outlet non-return valve; Described inlet non-return valve, moisture separator, deduster, gas flowmeter, air inlet spark arrester, insulation fix bed catalytic oxidizer, gas outlet spark arrester and outlet non-return valve are connected successively by pipeline, below moisture separator, discharge outlet installs draining valve, is connected at insulation fix bed catalytic oxidizer outlet installation operated pneumatic valve, condenser with tail gas tower again; Recyclegas enters gas circulating purification system by inlet non-return valve, successively by moisture separator, deduster, after insulation fix bed catalytic oxidizer, with close to former pressure Exhaust Gas circulating purification system.
Described insulation fix bed catalytic oxidizer comprises heat insulation layer, honeycomb ceramic type catalyst, electric calorifie installation, air inlet, gas outlet, temperature sensor; Described temperature sensor is arranged on insulating barrier inwall, described honeycomb ceramic type catalyst is arranged in the cavity of insulating barrier inside, described electric calorifie installation is arranged on honeycomb ceramic type catalyst, recyclegas enters from the air inlet below insulation fix bed catalytic oxidizer, through honeycomb ceramic type catalyst, discharge from gas outlet, top.
Described inlet non-return valve and outlet non-return valve are for ensureing the one-way that the gas circulated circulates, and by observing gas flowmeter, manual adjustment circulating fan makes wind speed remain on the suitable treatments scope of insulation fix bed catalytic oxidizer.
Described air supply system, is controlled to adjust air feed blower fan added a small amount of air from the external world, the temperature of controlled circulation gas by thermocouple temperature measurement.
Further, described air supply system comprises: three-way valve, air feed blower fan, thermocouple, and air supply system is arranged on nearly drying chamber inlet end position; Air feed blower fan is regulated to make, when recyclegas temperature is blown into air higher than during baking temperature, after three-way valve mixes with recyclegas, to reach baking temperature enter drying chamber, controlled circulation temperature by thermocouple.
After described recyclegas purification, redundance, by operated pneumatic valve, after condenser cooling, is discharged at tail gas tower.
Insulation fix bed catalytic oxidizer needs to do the pre-heat treatment before drying process, when temperature reach catalytic reaction temperature required after, close electric calorifie installation, pass into recyclegas.
The present invention has following advantage and effect relative to prior art:
1, the present invention makes full use of the heat of recyclegas heat and imflammable gas decomposition generation, and greatly reduce the hot blast of outer row, energy-saving effect is obvious.
2, eliminate in dry run or reduce the fuel gas drying constantly volatilization in drying chamber, compare the drying process that traditional limit is vented, limit supplements fresh air, the invention provides a kind of method of volatile organic compounds watershed management, and environmental protection needs the amount processing volatile organic compounds reducing greatly.
3, because the amount of supplementing fresh air reduces, the live gas heat time reduces, and therefore under equal dry mass condition, dry required time decreased, drying efficiency improves.
4, in dry run, the fuel gas of constantly volatilization is degraded to carbon dioxide and water, and therefore, in drying chamber, combustable gas concentration is controlled, and decreasing because combustable gas concentration reaches the explosion ratio limit because assembling, meeting the possibility that incendiary source is blasted.
Accompanying drawing explanation
Fig. 1 is present system structure principle chart.
Fig. 2 is insulation fix bed catalytic oxidizer structure principle chart.
Drawing reference numeral illustrates:
1, drying chamber; 2, drying chamber air inlet; 3, drying chamber exhaust outlet; 4, explosion-proof decompression device; 5, temperature detection device; 6, safety flare; 7, electric calorifie installation; 8, circulating fan; 9, inlet non-return valve; 10, moisture separator; 11, draining valve; 12, deduster; 13, gas flowmeter; 14, air inlet spark arrester; 15, insulation fix bed catalytic oxidizer; 16, operated pneumatic valve; 17, condenser; 18, tail gas tower; 19, gas outlet spark arrester; 20, outlet non-return valve; 21, three-way valve; 22, air feed blower fan; 23, thermocouple; 15a, heat insulation layer; 15b, honeycomb ceramic type catalyst; 15c, electric calorifie installation; 15d, air inlet; 15e, gas outlet; 15f, temperature sensor.
Detailed description of the invention
Below in conjunction with embodiment and accompanying drawing, the present invention is described in further detail, but embodiments of the present invention are not limited thereto.
Embodiment
See Fig. 1, a kind of heat-wind circulate drying system using gas circulating purification system of the present embodiment, comprising: an indirect heating type hot air circulation equipment; A gas circulating purification system with moisture separator, deduster, insulation fix bed catalytic oxidizer; An air supply system according to temperature moderating stream amount.
Described indirect heating type hot air circulation equipment, comprises drying chamber 1, drying chamber air inlet 2, drying chamber exhaust outlet 3, explosion-proof decompression device 4, temperature detection device 5, safety flare 6, electric calorifie installation 7, circulating fan 8; Described explosion-proof decompression device is arranged on the shell of drying chamber, described temperature detection device is arranged on the inwall of drying chamber, described safety flare is arranged on the top of drying chamber, air heat in drying equipment is extremely applicable to dry temperature by described electric calorifie installation, circulating fan drives the recyclegas in tank to enter gas circulating purification system from exhaust outlet, gas after treatment reenters in tank from drying chamber air inlet again, participates in dry run.
Described gas circulating purification system, comprises inlet non-return valve 9, moisture separator 10, draining valve 11, deduster 12, gas flowmeter 13, air inlet spark arrester 14, insulation fix bed catalytic oxidizer 15, operated pneumatic valve 16, condenser 17, tail gas tower 18, gas outlet spark arrester 19, outlet non-return valve 20; With reference to Fig. 2; Wherein insulation fix bed catalytic oxidizer 15, comprises heat insulation layer 15a, honeycomb ceramic type catalyst 15b, electric calorifie installation 15c, air inlet 15d, gas outlet 15e, temperature sensor 15f.
More steam, solid particle, inflammable organic gas is contained from the recyclegas with uniform temperature of drying chamber blowout, after gas enters system, make the moisture in recyclegas separated from the gas by moisture separator 10, unnecessary water can discharge 11 from the pipeline below moisture separator by draining valve; Recyclegas continues through deduster 12, makes the solid particle in recyclegas separated from the gas; Insulation fix bed catalytic oxidizer 15 should preheating before drying process, when temperature reach catalytic reaction temperature required after, close electric calorifie installation, pass into recyclegas; By the flammable organic gas in catalytic reaction Decomposition Cycle gas, and keep catalytic reaction temperature required by heat that decomposition reaction produces.Operated pneumatic valve 16, when gas pressure is excessive, by part clean gas by after condenser 17 condensation cooling, discharges 18 by tail gas tower.Inlet non-return valve 9 and outlet non-return valve 20 are for ensureing the one-way that the gas circulated circulates, by observing gas flowmeter 13, manual adjustment circulating fan 8 makes wind speed remain on the suitable treatments scope of insulation fix bed catalytic oxidizer, and air inlet spark arrester 14 and gas outlet spark arrester 19 are for playing insulating effect when accidental ignition appears in insulation fix bed catalytic oxidizer.
According to the air supply system of temperature moderating stream amount, comprise three-way valve 21, air feed blower fan 22, thermocouple 23, be arranged on nearly drying chamber inlet end position; Air feed blower fan 22 is regulated to make, when recyclegas temperature is blown into air higher than during baking temperature, after three-way valve 21 mixes with recyclegas, to reach baking temperature enter drying chamber, controlled circulation temperature by thermocouple 23.
Above-described embodiment is the present invention's preferably embodiment; but embodiments of the present invention are not restricted to the described embodiments; change, the modification done under other any does not deviate from Spirit Essence of the present invention and principle, substitute, combine, simplify; all should be the substitute mode of equivalence, be included within protection scope of the present invention.
Claims (8)
1. use a heat-wind circulate drying system for gas circulating purification system, it is characterized in that, comprise an indirect heating type hot air circulation equipment; It is a kind of for will the high-temperature gas process of VOC be contained and the gas circulating purification system recycled; One for the air supply system according to temperature moderating stream amount; Indirect heating type hot air circulation equipment gas outlet connects with gas circulating purification system, gas after treatment enters indirect heating type hot air circulation equipment again and carries out drying after air supply system regulates, and described gas circulating purification system comprises inlet non-return valve, moisture separator, draining valve, deduster, gas flowmeter, air inlet spark arrester, insulation fix bed catalytic oxidizer, operated pneumatic valve, condenser, tail gas tower, gas outlet spark arrester, outlet non-return valve; Described inlet non-return valve, moisture separator, deduster, gas flowmeter, air inlet spark arrester, insulation fix bed catalytic oxidizer, gas outlet spark arrester and outlet non-return valve are connected successively by pipeline, below moisture separator, discharge outlet installs draining valve, install operated pneumatic valve, condenser successively in insulation fix bed catalytic oxidizer outlet, condenser is connected with tail gas tower; Recyclegas enters gas circulating purification system by inlet non-return valve, successively by moisture separator, deduster, after insulation fix bed catalytic oxidizer, with close to former pressure Exhaust Gas circulating purification system.
2. a kind of heat-wind circulate drying system using gas circulating purification system according to claim 1, it is characterized in that, described indirect heating type hot air circulation equipment comprises drying chamber, drying chamber air inlet, drying chamber exhaust outlet, explosion-proof decompression device, temperature detection device, safety flare, electric calorifie installation, circulating fan; Air heat in drying chamber is extremely applicable to dry temperature by described electric calorifie installation, circulating fan drives the recyclegas in drying chamber to enter gas circulating purification system from exhaust outlet, gas after treatment reenters in tank from drying chamber air inlet again, participates in dry run.
3. a kind of heat-wind circulate drying system using gas circulating purification system according to claim 1, it is characterized in that, described insulation fix bed catalytic oxidizer comprises heat insulation layer, honeycomb ceramic type catalyst, electric calorifie installation, air inlet, gas outlet, temperature sensor; Described temperature sensor is arranged on insulating barrier inwall, described honeycomb ceramic type catalyst is arranged in the cavity of insulating barrier inside, described electric calorifie installation is arranged on honeycomb ceramic type catalyst, recyclegas enters from the air inlet below insulation fix bed catalytic oxidizer, through honeycomb ceramic type catalyst, discharge from gas outlet, top.
4. a kind of heat-wind circulate drying system using gas circulating purification system according to claim 1 or 3, it is characterized in that, described inlet non-return valve and outlet non-return valve are for ensureing the one-way that the gas circulated circulates, by observing gas flowmeter, manual adjustment circulating fan makes wind speed remain on the suitable treatments scope of insulation fix bed catalytic oxidizer.
5. a kind of heat-wind circulate drying system using gas circulating purification system according to claim 1, it is characterized in that, described air supply system, is controlled to adjust air feed blower fan added a small amount of air from the external world, the temperature of controlled circulation gas by thermocouple temperature measurement.
6. a kind of heat-wind circulate drying system using gas circulating purification system according to claim 5, it is characterized in that, described air supply system comprises: three-way valve, air feed blower fan, thermocouple, and air supply system is arranged on nearly drying chamber inlet end position; Air feed blower fan is regulated to make, when recyclegas temperature is blown into air higher than during baking temperature, after three-way valve mixes with recyclegas, to reach baking temperature enter drying chamber, controlled circulation temperature by thermocouple.
7. a kind of heat-wind circulate drying system using gas circulating purification system according to claim 1, is characterized in that, after described recyclegas purification, redundance, by operated pneumatic valve, after condenser cooling, is discharged at tail gas tower.
8. a kind of heat-wind circulate drying system using gas circulating purification system according to claim 1, it is characterized in that, insulation fix bed catalytic oxidizer needs to do the pre-heat treatment before drying process, when temperature reach catalytic reaction temperature required after, close electric calorifie installation, pass into recyclegas.
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| CN105066640B (en) * | 2015-08-25 | 2017-10-31 | 北京电力设备总厂有限公司 | Apparatus for recovering in air cooling coal |
| CN109624134B (en) * | 2017-10-09 | 2021-02-23 | 中国石油化工股份有限公司 | Styrene butadiene rubber drying device and method for reducing waste gas emission |
| CN108905609A (en) * | 2018-07-31 | 2018-11-30 | 中国华能集团有限公司 | Circulation of tail gas explosion-proof type coal mine gas catalytic oxidizing equipment and method |
| US11703229B2 (en) * | 2018-12-05 | 2023-07-18 | Yi-Ming Hung | Temperature adjustment apparatus for high temperature oven |
| CN110948127A (en) * | 2019-11-26 | 2020-04-03 | 上海波刺自动化科技有限公司 | Self-purification system and method for laser processing head cavity |
| CN116056540A (en) * | 2023-03-24 | 2023-05-02 | 泉州师范学院 | Device and method for preparing large-area perovskite film with assistance of hot air |
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