CN1401963A - Coating device and method using volatile organic compound as heat source - Google Patents

Coating device and method using volatile organic compound as heat source Download PDF

Info

Publication number
CN1401963A
CN1401963A CN02130426A CN02130426A CN1401963A CN 1401963 A CN1401963 A CN 1401963A CN 02130426 A CN02130426 A CN 02130426A CN 02130426 A CN02130426 A CN 02130426A CN 1401963 A CN1401963 A CN 1401963A
Authority
CN
China
Prior art keywords
voc
temperature
gas
baker
combustion
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN02130426A
Other languages
Chinese (zh)
Other versions
CN1162676C (en
Inventor
宋光燮
徐龙锡
赵盛畯
柳寅洙
丁湳条
刘相馝
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Korea Institute of Energy Research KIER
Original Assignee
Korea Institute of Energy Research KIER
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from KR50052/2001 external-priority
Application filed by Korea Institute of Energy Research KIER filed Critical Korea Institute of Energy Research KIER
Publication of CN1401963A publication Critical patent/CN1401963A/en
Application granted granted Critical
Publication of CN1162676C publication Critical patent/CN1162676C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26DRYING
    • F26BDRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B23/00Heating arrangements
    • F26B23/02Heating arrangements using combustion heating
    • F26B23/022Heating arrangements using combustion heating incinerating volatiles in the dryer exhaust gases, the produced hot gases being wholly, partly or not recycled into the drying enclosure
    • F26B23/024Heating arrangements using combustion heating incinerating volatiles in the dryer exhaust gases, the produced hot gases being wholly, partly or not recycled into the drying enclosure by means of catalytic oxidation
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B05SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05CAPPARATUS FOR APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05C9/00Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important
    • B05C9/08Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important for applying liquid or other fluent material and performing an auxiliary operation
    • B05C9/14Apparatus or plant for applying liquid or other fluent material to surfaces by means not covered by any preceding group, or in which the means of applying the liquid or other fluent material is not important for applying liquid or other fluent material and performing an auxiliary operation the auxiliary operation involving heating or cooling

Abstract

A coating device using volatile organic compound (VOC) as heat source is disclosed in the invention. The device comprises: a drier for evaporating a solvent contained in coating with hot blast and drying the coating; a combustor for igniting a fuel and exhausting an exhaust gas; and a mixer for mixing an air into the exhaust gas exhausted from the combustor in predetermined equivalent ratio, and adjusting a temperature of the mixture to proper level, and supplying the mixture as hot blast, which is used in the drier; and a heat exchanger characterized in that the evaporated gas discharged from the drier is heated by heat exchanging it with exhaust gas before entering the mixer, and then supplied as a fuel which is used in the combustor, wherein the combustor further comprises a combustion catalyst which helps the combustion of heated, evaporated gas. According to an embodiment of the invention, the VOC generated in the combustion coating process is catalyzed directly and the combustion heat of the VOC is easily supplied to the process. Thereby, cost of device and operation is greatly reduced and pollution of the environment is prevented, compared with traditional system.

Description

With the VOC is the plater and the method thereof of thermal source
Technical field
The invention relates to plater, particularly effectively discharge and resemble the VOC (VOC:Volatile Organic Compound) that discharges in the coating procedure of fabric coating device, leather coating device, plastic coating device, be the heat utilization of being emitted in this process the baker thermal source simultaneously, the plater of catalytic combustion mode and relevant method thereof.
Background technology
Generally in processes such as fabric coating, leather coating, plastic coating,, certain thickness resin is coated on textile, skin and the plastics etc., and makes it to become finished product in order to improve the characteristic of goods.The method of carrying out coating with certain thickness resin is at first resin to be dissolved in the solvent, then the coating liquid that is dissolved with resin is coated in above textile, skin, the plastics etc. with certain thickness, they is dried in baker again, makes it stay resin.
The most of plater that uses is a heat hot medium in boiler at present, and utilizes this heat medium to generate hot blast in baking oven, thereby supplies heat required when drying.But the VOC that discharges in drying course (VOC: below be called " VOC ") becomes the solvent of gaseous state, and it has diluting effect, and discharges in air with the state of gas.The VOC that takes place in drying course can cause cancer etc., and human body is done sizable harm; And when being subjected to sunshine and nitrogen oxide react, generate optical smoke; Cause global warmingization and the problem of destroying the ozone gas-bearing formation in addition.
In December nineteen ninety-five, in Korea S,, formulated the regulation relevant with VOC by the revision of atmospheric environment protection method.Therefore, from 1999, according to the 28th article of the 2nd regulation of atmospheric environment protection method, the use of stipulating territorial restrictions VOC in the atmospheric environment of appointment.
Though the VOC that sends in coating procedure is an environmental pollutants, itself has heat, therefore, if properly utilize, can become good fuel.So in fabric coating, under the low situation of the concentration of VOC, it is concentrated and catalytic combustion, this method is exactly the patent disclosure number 98-551 (the first existing invention) of registered patent.Can make the low-temperature catalytic burning stove of liquefied gas (LPG) and VOC dual-purpose become the patent disclosure number 99-75803 (the second existing invention) of registered patent with the fiber coat baker.
The first existing method is that the low concentration VOC that sends in baker is concentrated the back use, and the second existing method is to produce hot supply in order effectively to improve, can be near the catalytic combustion stove that heats behind the yarn fabric, and it can strengthen the oven dry heating surface (area) (HS.Though the first existing method possesses the device of concentrated VOC, the costing an arm and a leg of its device is from increasing some burdens economically; The second existing method is to change the catalytic combustion mode.Therefore, if think directly to utilize the heat of sending in combustion process, the form of burner and catalyst also will change thereupon.
In order to solve the problem of described existence, the present invention is self thermal source with low expense with the high VOC of concentration that takes place in the coating procedure, carries out catalytic combustion and it is used for the oven dry of coating substance.
To realize that described technical problem is a purpose, with VOC of the present invention is that the plater of thermal source and method thereof are that the concentration that is used for the VOC (VOC) of discharging from engineering is high concentration, promptly is higher than the plater of 1500ppm.Therefore, the present invention has the benefit that does not need to concentrate the VOC device economically.So the present invention does not possess enrichment facility, but possesses the device of direct catalytic combustion VOC.
Be catalytic combustion, the present invention makes the temperature of VOC rise to the temperature that can carry out catalytic reaction, and with the catalytic burner catalytic combustion of mixed form, at this moment, the catalytic burner of use is compared with the diffusion type catalytic burner, and response area is little, air is mixed in advance with fuel, enter into the one side of Catalytic Layer, and after catalytic surface reacts, discharge from another side.Therefore, the heat that produces in combustion reaction can not heat reacting gas (fuel and Air mixing gas or comprise the gas of VOC), thereby utilizes other heat exchanger heats reacting gas.
Summary of the invention
The present invention can carry out the temperature of catalytic reaction and utilizes heat exchanger for the temperature that makes VOC rises to.The heat of heat exchanger supply is the heat that produces in the catalytic burner.The heat that described catalytic burner produced is used to dry the thermal source of textile, leather, plastics.Therefore, this invention is characterised in that and utilizes the VOC required heat in the engineering of settling a dispute by the parties concerned themselves.The present invention also comprises: variable mixing arrangement, and it is in order to prevent the overheated of Catalytic Layer, the trip temperature of going forward side by side is regulated, to the device of Catalytic Layer front supply air; Exhaust distributor behind the catalytic combustion, it is the catalytic combustion thermal energy that makes the imflammable gas as VOC, and the device of supplying with certain temperature.
The present invention is the starting initial stage at plater, when promptly in engineering, also not emitting imflammable gas VOC for the hot feeding mechanism of required subsidy of settling a dispute by the parties concerned themselves, (LPG: liquefied gas), its catalytic combustion characteristic is with similar with the toluene that is primary solvent in most of coating procedure to use liquefied petroleum gas as the subsidy thermal source.
Therefore, plater of the present invention has following feature:
Plater comprises: to dry the baker of coating substance with the mode of the solvent that contains in the hot blast evaporation coating substance; Burner with the exhaust of combustion fuel method; Exhaust of discharging in the burner and air are mixed by certain equivalent proportion, and it is transferred to after the suitable temperature, be fed to the blender of the hot blast that is used in baker again.
This plater comprises: discharge the boil-off gas of emitting in the described baker by burner, then the mode of the exhaust that does not enter blender as yet with heat exchange heated, it is utilized as the heat exchanger of described combustion chamber fuel again; Burner contains the combustion catalyst of helpful heating evaporation gas combustion.
As described, plater of the present invention is the plater that can be applicable to existing heat medium and hot-air seasoning textile, leather, plastics.
Description of drawings
Fig. 1 is according to embodiments of the invention, is the schematic drawing of the plater of thermal source with the VOC that discharges in the coating engineering.
Fig. 2 is according to embodiments of the invention, the state diagram of the exhaust of mixing baking oven and the first variable blender of air.
Fig. 3 is according to embodiments of the invention, the state diagram of the catalytic combustion exhaust gas of mixing high temperature and the second variable blender of air.
Fig. 4 is according to embodiments of the invention, from the entry and exit temperature of catalytic burner and the image of conversion volatile organic matter concentration.
The specific embodiment
As follows, according to accompanying drawing,, illustrate the plater of the VOC that in coating procedure, produces as thermal source according to embodiments of the invention.
Fig. 1 is according to embodiments of the invention, is the skeleton diagram of the plater of thermal source with the VOC that produces in coating procedure.As shown in Figure 1, plater of the present invention is with baker 100, the first variable blenders 200, heat exchanger 300, and catalytic burner 400, variable allocation device 500, the second variable blenders 600 and most blowers 710,720,730,740 constitute.At the starting initial stage of plater, promptly before from coating substance, producing VOC, liquefied petroleum gas Pg and air A1 are mixed into mist g1 with blender 800, by blower 720 this mist g1 is fed to the first variable blender 200.
Like this, the mixing air that is fed to the first variable blender 200 is heated to the reaction temperature of catalytic combustion by electric preheating or heat exchanger 300, is communicated to catalytic burner 400 then and burns, thereby required heat is provided for baker 100.
As described, produce the initial stage heat, and to baker 100 heating loads.
Heat is provided to after the baker 100, and the textile that baker is 100 li, leather, plastics become dry thereupon, at this moment are contained in the organic solvent volatilization in the coating liquid, are discharged to outside the hot-air roaster 100 by blower 710 then.
The exhaust g2 that contains the volatile organic solvent that is discharged from from baker 100 is VOC, for the adjustment and the completing combustion of Catalytic Layer, and is sent to the first variable blender 200.
The air that the first variable blender 200 usefulness blowers 720 are sent to VOC mixes in the proper ratio, then this gaseous mixture g3 is delivered to heat exchanger 300.
If think more detailed understanding, please see Figure 2.The first variable blender 200 is fed to heat exchanger 300 to VOCg1 that enters from blower 710 and the gas g3 that mixes from the air g2 that blower 720 enters.At this moment, the first variable blender 200 is only supplied the mist g1 of liquefied petroleum gas Pg and air A1 in the plater initial stage.If plater begins to dry, and when producing VOC, according to the temperature and the equivalent proportion of exhaust, the supply air is also regulated.
Then, heat exchanger 300 carries out heat exchange from catalytic combustion exhaust g8 heat-obtaining and gaseous mixture, and promotes the temperature of gaseous mixture g3, again the catalytic combustion exhaust g4 of high temperature is sent to catalytic combustion system, and promptly catalytic burner 400.
At this moment, be fed among the catalytic combustion exhaust g8 of heat exchanger 300, because heat exchange and the outside is emitted in the exhaust of step-down temperature.At this moment the gas VOC that is excluded is burned fully, so atmospheric environment is had no effect.
Catalytic burner 400 falls the high-temperature gas catalytic combustion of discharging by heat exchanger 300, and the high temperature catalytic combustion exhaust g5 that discharges this moment is passed to variable allocation device 500.
Variable allocation device 500 is distributing by a certain percentage at the high temperature catalytic combustion exhaust g5 of 400 li generations of catalytic burner.The variable allocation device distributes a catalytic combustion exhaust g6 of 500 to be transferred to hot-air roaster 100, and other catalytic combustion exhaust g7 is transferred to heat exchanger 300.
The catalytic combustion exhaust g7 that is transferred to heat exchanger 300 passes to heat exchanger by blower 730, and it has the temperature of impelling catalytic reaction to uniform temperature the gas lift of 300 li of heat exchangers then, and equitemperature is discharged in the atmosphere after descending.
On the other hand, the high temperature catalytic combustion exhaust g6 that passes to hot-air roaster machine 100 passes to the second variable blender 600, mixes with air A2 then, is supplied to baker 100 again.
If think to understand in more detail, please see Figure 3.The second variable blender 600 is transferred to the temperature that is suitable for drying to high temperature catalytic combustion exhaust g6 and is provided with, and it can improve drying efficiency.In order to regulate the temperature of baking oven machine inlet easily,, and regulate the air A2 amount that is inhaled into the delivery temperature of Catalytic Layer outlet ratio mutually.
In described content, can adopt the cellular-type of on market, buying easily, foam-type, fiber type, or mesh-type as Catalytic Layer.Do material and use porcelain or metal, do the catalytic activity thing and adopt platinum, the catalyst of the composite oxides of noble metal such as palladium radium or perovskite form.
At 600 li exhaust g9 that mix up temperature of the second variable blender, be fed to baker 100 by blower 740.Be supplied to the coating substance of the VOC catalytic combustion thermal energy oven dry of baker 100 for 100 li of dried devices.
As described, because of the temperature of exhaust is very low, can not catalytic combustion, so will be heated to the temperature that can cause catalytic combustion, and whole system is to adopt the endless form of burning and gas-exhausting, therefore if air in certain amount is supplied, will be released with the exhaust of amount.Therefore, distributing the high temperature catalytic combustion exhaust by a certain percentage is the heat energy that sends in this process in order to maximally utilise.
If regulate the temperature and the equivalent proportion of the catalytic combustion system of VOC (VOC), must test the concentration of VOC earlier here.But the expense costliness of concentration determination device so the present invention does not adopt the concentration determination device, and has adopted the temperature difference (variations in temperature) of the inlet temperature of catalytic burner 400 and gateway and the big probable value calculated.The value of calculating in this way, the stream opening ratio and the equivalent proportion of regulating each variable blender 200,600.
Fig. 4 is when VOC is configured by toluene, utilizes the inlet temperature and the gateway temperature difference of catalytic burner, and the image of calculating concentration.
Be the example that dwindles the test of specification of a model coated and dried below with the yarn fabric plater of the present invention's indication.
At first, LPG and Air mixing gas are passed to heat exchanger 300 from the first variable blender 200, and utilize electric light to be preheating to reaction temperature, the heat supply baker of emitting when again catalytic burner being burnt.If with the LPG heater about 30 minutes, oven temperatures will reach the temperature that is fit to oven dry, at this moment, the textile of coating is put in the baking oven, begin to dry.When the textile of coating begins to dry, just emit VOC.The concentration of the VOC that emits at first is very low, but the time is long more, and concentration is just big more, and about mistake 20 minutes, and it is stable that its concentration just becomes.The oven dry initial stage should supply LPG equally, but the concentration of the VOC that discharges has arrived greater than 1350ppm, interrupts the supply of LPG, only carries out engineering with the VOC that discharges in this process.
In above narration, with additional caption technological thought of the present invention, the embodiment that this just is expected with the method explanation of indication is not this invention of qualification.As long as have the people of the knowledge of this technical field, in the scope that does not break away from technological thought of the present invention, can carry out various imitation or variation.
The present invention is the VOC catalytic combustion heat that produces in the coating engineering of catalytic combustion directly, and directly the combustion heat of VOC is fed to this engineering.Therefore, this device is compared with existing systems, can significantly reduce installation cost and running cost, and plays antipollution effect.

Claims (5)

1. plater that utilizes VOC for thermal source, this device comprises: with the baker of the solvent oven dry coating substance that contains in the hot blast evaporation coating substance, burner with the exhaust of combustion fuel method, exhaust of discharging in the burner and air are mixed by certain equivalent proportion, and it is transferred to after the suitable temperature, be fed to the blender that is used in the hot blast in the baker again, it is characterized in that
Discharge the boil-off gas of emitting in the described baker by described burner, then the mode of the exhaust that does not enter blender as yet with heat exchange heated, again it is utilized as the heat exchanger of combustion chamber fuel; Described burner comprises: the combustion catalyst that helps the heating evaporation gas combustion.
2. device as claimed in claim 1, this plater comprises: when the initial stage of plater start-up period is not promptly emitted VOC (VOC), after air and LPG (liquefied gas) mixing, provide the variable blender of thermal source to baker.
3. device as claimed in claim 2 is characterized in that, when the concentration of described VOC reached the high concentration of 1500ppm, described air and LPG did not flow in the described first variable blender.
4. device as claimed in claim 1 is characterized in that, described blender adopts the inlet temperature of described catalytic burner and gateway variations in temperature and the value calculated, adjusts certain equivalent ratio with the opening ratio of adjusting stream.
5. one kind is the coating process of the plater of thermal source with the VOC, this device comprises: with the baker of hot-air seasoning object, the heat exchanger that the VOC of emitting in baker and the high-temperature gas that is inhaled into are carried out heat exchange, the burner of the high-temperature gas of discharging in the combustion heat interchanger and the blender that the exhaust of described burner and air is mixed and offer the thermal source of described baker, it is characterized in that
This device coating method comprises four-stage, that is:
VOC and air that phase I is emitted baker mix;
Second stage is carried out heat exchange to the gas that mixes and the gas of high temperature in the phase I, up to the temperature of energy catalytic combustion, discharge the gas that reduces temperature because of heat exchange then;
Phase III is the gas combustion of described intensification, and emits high-temperature gas;
Part in the quadravalence section handle high-temperature gas of emitting in the phase III offers the high-temperature gas of second stage, and a remaining part and an air mixed, and offers described baker thermal source again.
CNB021304262A 2001-08-20 2002-08-19 Coating device and method using volatile organic compound as heat source Expired - Lifetime CN1162676C (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR50052/2001 2001-08-20
KR10-2001-0050052A KR100443367B1 (en) 2001-08-20 2001-08-20 Coating dryer and drying method using heat of catalytic incineration for volatile organic compound

Publications (2)

Publication Number Publication Date
CN1401963A true CN1401963A (en) 2003-03-12
CN1162676C CN1162676C (en) 2004-08-18

Family

ID=19713354

Family Applications (1)

Application Number Title Priority Date Filing Date
CNB021304262A Expired - Lifetime CN1162676C (en) 2001-08-20 2002-08-19 Coating device and method using volatile organic compound as heat source

Country Status (2)

Country Link
KR (1) KR100443367B1 (en)
CN (1) CN1162676C (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103575085A (en) * 2012-07-31 2014-02-12 苏州福斯特光伏材料有限公司 Combustion disposing, drying and heating integrated unit for organic waste gas emitted by coater
CN103673564A (en) * 2013-12-03 2014-03-26 华南理工大学 Hot air circulation drying system with gas circulation purification system
CN103697483A (en) * 2013-12-24 2014-04-02 东华大学 System for burning and treating waste gas emitted by dyeing and finishing heat-setting machine
CN104515374A (en) * 2013-09-30 2015-04-15 台橡股份有限公司 Ecosystem and plant using the same
CN107303451A (en) * 2016-04-21 2017-10-31 云南泰誉实业有限公司 A kind of environment-friendly type VOCs volatilizations organic exhaust gas Collection utilization system

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106238041A (en) * 2016-07-28 2016-12-21 天津大学 The preparation method of the catalyst that volatile organic matter ozonisation is decomposed it is catalyzed under a kind of room temperature
KR102014091B1 (en) * 2017-11-02 2019-09-27 최상철 The thermo-decomposition apparatus for waste gas
KR20200138899A (en) 2019-06-03 2020-12-11 김기영 Coating drying equipment using conduction of conveyer belt

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5134787A (en) * 1990-06-06 1992-08-04 Heron Technologies, Inc. Catalytic dryer
KR100199410B1 (en) * 1996-06-28 1999-06-15 최수현 Method and apparatus for treating waste gas produced by heating organic compounds
KR100258580B1 (en) * 1998-03-25 2000-06-15 최수현 A low temperature catalytic combustion burner and a fabric coating drier using the burner
CA2329795C (en) * 1998-05-07 2004-07-13 Megtec Systems, Inc. Web dryer with fully integrated regenerative heat source
KR100380297B1 (en) * 2000-09-19 2003-04-16 김상남 Multistage tape heat withdrawal apparatus using Brown gas

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103575085A (en) * 2012-07-31 2014-02-12 苏州福斯特光伏材料有限公司 Combustion disposing, drying and heating integrated unit for organic waste gas emitted by coater
CN103575085B (en) * 2012-07-31 2016-04-20 苏州福斯特光伏材料有限公司 A kind of organic exhaust gas burning process of coating machine discharge and oven dry heating combined unit
CN104515374A (en) * 2013-09-30 2015-04-15 台橡股份有限公司 Ecosystem and plant using the same
CN104515374B (en) * 2013-09-30 2017-09-26 台橡股份有限公司 Environment friendly system and its application in the factory
CN103673564A (en) * 2013-12-03 2014-03-26 华南理工大学 Hot air circulation drying system with gas circulation purification system
CN103673564B (en) * 2013-12-03 2016-04-13 华南理工大学 A kind of heat-wind circulate drying system using gas circulating purification system
CN103697483A (en) * 2013-12-24 2014-04-02 东华大学 System for burning and treating waste gas emitted by dyeing and finishing heat-setting machine
CN107303451A (en) * 2016-04-21 2017-10-31 云南泰誉实业有限公司 A kind of environment-friendly type VOCs volatilizations organic exhaust gas Collection utilization system

Also Published As

Publication number Publication date
KR100443367B1 (en) 2004-08-09
CN1162676C (en) 2004-08-18
KR20030016475A (en) 2003-03-03

Similar Documents

Publication Publication Date Title
US5729967A (en) Method of operating a gas turbine on reformed fuel
US7074033B2 (en) Partially-open fired heater cycle providing high thermal efficiencies and ultra-low emissions
US20040255588A1 (en) Catalytic preburner and associated methods of operation
CN1162676C (en) Coating device and method using volatile organic compound as heat source
CA2543028C (en) Carrier air heating system for scr
CN101389905B (en) System, apparatus and method for flameless combustion absent catalyst or high temperature oxidants
JPH03177703A (en) Method of operating firing installation
JP2000514911A (en) Catalytic combustion chamber and method for ignition and control of the catalytic combustion chamber
CN107110493B (en) Mix homogeneous catalysis combustion system
CN1739868A (en) Steel belt coating stoving method and apparatus
JP2002168571A (en) Firing furnace and method for treating exhaust gas using it
CN102782412B (en) Device for providing hot exhaust gases
US6412190B1 (en) Infrared and hot air dryer combination
CN2853193Y (en) Baking device with steel coating
CN2150929Y (en) Hot air drier for coating
CN110285446A (en) A method of control gas turbine discharged nitrous oxides
CN101566425B (en) Method for improving medium heat conductivity in curing furnace
CN214307646U (en) Combustor and gas water heater
JP3359312B2 (en) Removal method of dioxins in waste incinerator
CN218442322U (en) Waste gas recycling system
KR100441903B1 (en) Directly heating paint booth, saved energy
CN114688532A (en) Combustor and gas water heater
JPH08587Y2 (en) Catalytic combustion device
CN1099559C (en) Multistage far-infrared radiation machine
WO2023139472A1 (en) Catalytic burner and hydrogen boiler for water heating

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C14 Grant of patent or utility model
GR01 Patent grant
CX01 Expiry of patent term

Granted publication date: 20040818

CX01 Expiry of patent term