CN108397782A - A kind of volatile organic matter heatable catalytic combustion reactor and its method - Google Patents
A kind of volatile organic matter heatable catalytic combustion reactor and its method Download PDFInfo
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- CN108397782A CN108397782A CN201810175942.1A CN201810175942A CN108397782A CN 108397782 A CN108397782 A CN 108397782A CN 201810175942 A CN201810175942 A CN 201810175942A CN 108397782 A CN108397782 A CN 108397782A
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- catalyst
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/06—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases
- F23G7/07—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases in which combustion takes place in the presence of catalytic material
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- Environmental & Geological Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Incineration Of Waste (AREA)
Abstract
A kind of volatile organic matter heatable catalytic combustion reactor and its method, belong to volatile organic compounds by catalytic combustion reactor and its method.The heatable catalytic combustion reactor includes having heaters and catalyst, and catalyst is wrapped in outside heater；The heater is heated Tube heater or heated Tube heater.Heatable catalytic combustion method：Catalyst layer is attached to the outer layer of heated Tube heater, and hot fluid is led in heated Tube heater or is inserted into electrically heated rod heating, the exhaust gas containing VOCs is heated and be catalyzed burning outside heating tube.The present invention makes catalysis reaction react in high reaction temperatures by heatable catalyst, and the mean temperature of exhaust gas is lower than catalyst temperature.Compared with prior art, the present invention saves the energy, and catalyst temperature is constant, catalyst life is high, and exhaust gas can normal reaction in lower concentration, lower temperature；There is the indoor pollution of heating, heating suitable for solving house, baking finish room, paint spray booth, automobile, workshop containing VOCs etc..
Description
Technical field
The present invention relates to a kind of volatile organic compounds by catalytic combustion reactor and its method, especially a kind of volatility is organic
Object heatable catalytic combustion reactor and its method.
Background technology
For using Production by Catalytic Combustion Process destroy volatile organic compounds (VOCs) exhaust gas, feature be mixed into air it is extremely low
The VOCs gases of concentration.When handling the VOCs of large-wind-volume low-concentration, generally use activated carbon, the sieve absorption of zeolite equimolecular, when
Desorption and regeneration is carried out after adsorption saturation again, the desorption temperature degree and concentration after desorption are higher, and the concentration being desorbed in gas would generally be controlled
System is in lower explosion limit and there are 1/4 safe concentration hereinafter, therefore, compared with common fuel, the concentration of VOCs is very low.Through
Groping for decades is crossed, such low concentration VOCs can be realized from heat supply burn by heat regenerator now.But it is existing
Technology, there is still a need for the air of outer benefit energy sources for heating desorption, can realize that the concentration range burnt from heat supply is still not wide enough in desorption,
Capital investment shares shared by heat exchanger are still bigger, and the temperature of burning is not high enough, and RTO and RCO are difficult the interruption for adapting to frequent start-stop
Operation.
Chinese patent CN206103642 is managed used flue gas recirculation on VOCs desorption catalyzing burners at which；
CN104096450 has used flue gas desorption when its runner is desorbed；CN105509074 has used cigarette in combined padding and drying system
Gas repeatedly recycles catalysis burning；These patents are all sizable to have pushed technological progress and social development, but is heated when start and stop
Time is long, and start and stop speed is slow, and this kind of technology all has a problem that：When air inlet does not reach the initiation temperature of catalysis, catalysis
Problem of Failure is than more serious after agent carbon distribution, and catalysis ignition temperature is higher, and operating cost is higher；This problem as catalysis burning with
Heating power oxidation is compared, and operation temperature is low, operating cost is low, how to further decrease operation temperature, can further decrease behaviour
Make expense.
When paint spray booth, the heating of baking finish room, a large amount of VOCs gases are very big in heater high-temperature surface circulation number, such as dry
Circulating ratio has reached 300 times in japanning room 1 hour, although heater surface temperatures reach 400 DEG C or more, and is put down by heat gas
Equal temperature is typically not capable of catalysis initiation temperature, and common baking finish room heating temperature is usually no more than 80 DEG C, therefore, existing catalysis
Combustion technology cannot directly reduce the VOCs concentration in baking finish room.Even if reaching initiation temperature, catalyst when ignition temperature is too low
The problem of there is also inactivations.In the dynamic combustion stage, the temperature of catalysis burning is improved, can obviously accelerate VOCs combustion reaction speed
Rate improves the degree of VOCs completely burneds.When catalysis ignition temperature is higher than initiation temperature, VOCs removal rates increase with temperature in finger
Number increases, and after reaching the diffusion combustion stage, overall reaction rate is limited by mass transfer, therefore improves ignition temperature and reduce operating cost
With being contradictory.
A kind of inventions with the electric heater for decomposing indoor VOCs gas function of CN201610641933.8 propose decomposition
The method of indoor VOCs gas.Use when it was found that other main organic pollutions in addition to formaldehyde, existing catalyst
Catalysis burning VOCs temperature mostly at 250-400 DEG C, it is clear that initiation temperature is far not achieved in most indoor temperatures, due to
When the following catalyst of initiation temperature encounters VOCs, catalysis reaction is also slowly carried out on catalyst surface, in the shorter time
Interior, catalyst surface generates a large amount of carbon distribution, hinders further reaction, causes catalyst inactivation.How to solve similar
The problem of, improve catalyst service life, this is the main problem put in face of us.
Since zeolite and activated carbon equimolecular sieve ratio surface area are huge, after adsorbing organic combustible molecule, if without foot
Air-flow cooling is measured, is locally easy to that intergranular combustion reaction releasing heat occurs with the intergranular of molecular sieve absorption oxygen, gently then molecular sieve is burnt
Absorption property declines to a great extent after knot, heavy then therefore open fire burning occurs adsorption process and cannot lose in higher temperature later
Air-flow cools down.Especially temperature cannot be excessively high in desorption for activated carbon, is prone to ignition when the temperature is excessively high, usually heat is empty
The attached temperature requirement of qi exhaustion at 100 DEG C hereinafter, generally at 85 DEG C or so be desorbed time be up to 4-6 hours, 100 DEG C of desorption times
Only 1 hour, the temperature of desorption was low, and the temperature requirement for organic matter benzene,toluene,xylene catalysis burning of painting is usually in 250-
Catalyst carbon deposition problem as described above easily occurs between 400 DEG C, when temperature is too low.On the one hand the temperature of desorption is only in 60-200
Between DEG C, on the other hand the temperature of catalysis burning is usually required that at 250-400 DEG C.Therefore, desorption gas under normal conditions cannot be straight
Catalysis burning is connect, needs to reheat, the contradiction between low temperature desorption and high-temp combustion is obvious.
Invention content
Technical problem：The purpose of invention is the shortcomings of the prior art to be overcome, and providing a kind of volatility has
Machine object heatable catalytic combustion reactor and its method, catalyst carbon deposition leads to catalyst initial failure and underload when solving low temperature
When efficiency of combustion decline, exhaust disadvantage not up to standard.
Technical solution：The volatile organic matter heatable catalytic combustion reactor of the present invention, including having heaters and be wrapped in
Catalyst layer on heater outer wall；The heater is tube heater or is rod heater.
The material of heating tube or heating rod in the tube heater or rod heater be 06Cr19Ni10,
1Cr18Ni9Ti、0Cr25Ni20、SiC、Al2O3, activated alumina, graphite, molybdenum disilicide, thermistor ceramics or quartz in
It is a kind of.
The catalyst layer is the mottled of intermittent annulus, intermittent silk screen or dispersion.
The shape of the tube heater is round, more prismatic or ellipse.
The shape of the rod heater is plate shaped, wire mesh shape, honeycombed or fin shape.
Implement a kind of combustion method of above-mentioned volatile organic matter heatable catalytic combustion reactor：Pass through plating, chemistry
The catalyst layer one of (Pt) or palladium (Pd) are attached on the outer wall of the heating tube in tube heater by plating, coating or casing, will
Heating tube is placed in the space containing VOCs exhaust gas；It is passed through high-temperature flue gas hot fluid into heating tube to be heated, heating tube pipe
Wall is heated, and heat is transmitted on catalyst layer, when the temperature of catalyst reaches the temperature of suitable catalyst burning, in exhaust gas
VOCs molecules are adsorbed to one surface of catalyst layer, and then catalysis burning occurs under the catalysis of catalyst.
The combustion method for implementing above-mentioned another volatile organic matter heatable catalytic combustion reactor, by being electroplated, changing
It learns and plates, on the outer wall for the electrically heated rod that the catalyst layer two of (Pt) or palladium (Pd) are attached to rod heater by coating or casing,
Electrically heated rod is placed in the space containing VOCs exhaust gas, heating rod energization is heated, after heating rod is heated, heat passes
It leads on catalyst layer, when the temperature of catalyst layer reaches the temperature of suitable catalyst burning, the volatile organic matter in exhaust gas
VOCs molecules are adsorbed to two surface of catalyst layer, and then catalysis burning occurs under the catalysis of catalyst.
The heating rod uses thermistor ceramic heater, and for heating rod under Curie temperature effect, temperature gets over high resistance
Bigger, with heating Wen Sheng, resistance rises heating power and declines, and catalyst temperature tends to be constant, and catalysis burning is at 250-400 DEG C
Realize constant temperature.
Advantageous effect：As the above scheme is adopted, the present invention, which solves catalyst carbon deposition, leads to catalyst initial failure
Decline with efficiency of combustion when underload, exhaust problem not up to standard.Make temperature in catalyst layer than the VOCs exhaust gas that is heated
Height saves the energy, is removed by the VOCs in heat gas using heating process；Both it ensure that catalysis reaction occurs at high temperature,
Make exhaust gas temperature in lower level again, reduces energy consumption.In the heater application of air-conditioning, radiator, steam air heater, or it is applied to
Interior, car, baking finish room have in the workshop of VOCs and heat, and can effectively reduce indoor VOCs content, and VOCs is catalyzed and is burnt
Heat release becomes a part for heating, that is, has purified air, and improve indoor temperature, is a kind of ideal air purifier and side
Method.The present invention is different from normal exhaust-gas treatment, and such room air is among continuous cycle, foregoing baking finish room,
If not new VOCs releases, 1 hour is about 300 times by the circulating ratio that heat gas passes through heater, even if single is logical
The VOCs contents that purification efficiency when crossing heater is also only after 1%, 1 hour in air are less than initial 5%.If it is room
Inside there are air-conditioning or steam air heater, single purification efficiency to be also maintained at 1%, takes normal 60 time/hour of heating circulating ratio, heating 8 small
When after-purification efficiency up to can be to 99%.Therefore, although single purification efficiency of the invention is relatively low, indoor circulation wind is come
It says, purification is highly effective.The present invention is suitable for interior, and there are the VOC of heating condition catalysis to burn；Exhaust gas temperature containing VOCs is low, section
Save heating energy source；Catalyst amount is few, long lifespan, reduces investment outlay.The present invention can also solve house, baking finish room, paint spray booth, vapour
There is the indoor pollution of heating, heating in vehicle, the workshop etc. containing VOCs.Make catalysis reaction higher anti-by heatable catalyst
It is reacted at a temperature of answering, and the mean temperature of exhaust gas is lower than catalyst temperature.Compared with prior art, the present invention is catalyzed burning and saves
The energy, catalyst temperature is constant, catalyst life is high, and exhaust gas can normal reaction in lower concentration, lower temperature.The letter of its structure
Single, easy to operate, using effect is good, has wide applicability.
Description of the drawings
Fig. 1 is the heated Tube catalytic combustion reactor of the embodiment of the present invention one.
Fig. 2 is that the embodiment of the present invention two heats bar type catalytic combustion reactor.
Wherein, 1- heating tubes, 2- catalyst layers one, 11- heating rods, 12- catalyst layers two.
Specific implementation mode
The embodiment of the present invention is further described below in conjunction with the accompanying drawings：
Embodiment one：Volatile organic matter heatable catalytic combustion reactor as shown in Figure 1, mainly by heater and package
Catalyst layer on heater outer wall is constituted；The heater is tube heater, the material of the heating tube 1 of tube heater
Matter is 06Cr19Ni10,1Cr18Ni9Ti, 0Cr25Ni20, silicon carbide (SiC), aluminium oxide (Al2O3), activated alumina, graphite,
One kind in molybdenum disilicide, thermistor ceramic (PTC) or quartz.The shape of the tube heater be round, more prismatics,
Or ellipse.
The combustion method of the volatile organic matter heatable catalytic combustion reactor of embodiment one：Pass through plating, chemical plating, painting
The catalyst layer 1 of platinum (Pt) or palladium (Pd) is attached on the outer wall of the heating tube 1 in tube heater by material or casing, tubular type
Lead to hot fluid in heater or be inserted into electrically heated rod heating, the exhaust gas containing VOCs is heated and be catalyzed burning outside heating tube.It will
Heating tube 1 is placed in the space containing volatile organic matter VOCs exhaust gas, and the progress of high-temperature flue gas hot fluid is passed through into heating tube
Heating, after heating tube wall is heated, heat is transmitted on catalyst layer 1, when the temperature of catalyst reaches suitable catalyst
When the temperature of burning, the volatile organic matter VOCs molecules in exhaust gas are adsorbed to the surface of catalyst layer 1, and then are being catalyzed
Catalysis burning occurs under the catalysis of agent.
Embodiment two：As shown in Fig. 2, being mainly made of heater and the catalyst layer being wrapped on heater outer wall；Institute
The heater stated is rod heater.The enclosure material of heating rod 11 in the rod heater be 06Cr19Ni10,
1Cr18Ni9Ti, 0Cr25Ni20, silicon carbide (SiC), aluminium oxide (Al2O3), activated alumina, graphite, molybdenum disilicide, temperature-sensitive electricity
One kind in resistance ceramic (PTC) or quartz.The catalyst layer 2 12 be continuous, intermittent annulus, intermittent silk screen or
That disperses is mottled.The shape of the rod heater is plate shaped, wire mesh shape, honeycombed or fin shape.
The combustion method of the volatile organic matter heatable catalytic combustion reactor of embodiment two：Pass through plating, chemical plating, painting
The catalyst layer 2 12 of platinum (Pt) or palladium (Pd) is attached on the outer wall of electrically heated rod 11 of rod heater by material or casing, electricity
Heating rod electrified regulation, the exhaust gas containing VOCs are heated and are catalyzed burning outside electrically heated rod；The catalyst layer 2 12 is
Continuously, intermittent annulus, intermittent silk screen or dispersion is mottled.Electrically heated rod merging is contained into volatile organic matter
In the space of VOCs exhaust gas, VOCs exhaust gas is flowed through on stick surface, is heated to heating rod energization, after heating rod is heated, heat
It is transmitted on catalyst layer, when the temperature of catalyst layer reaches the temperature of suitable catalyst burning, the volatility in exhaust gas is organic
Object VOCs molecules are adsorbed to 2 12 surface of catalyst layer, and then catalysis burning occurs under the catalysis of catalyst；
When thermistor ceramics (PTC) heater of heating rod using the auxiliary heat of air conditioner electric, due to Curie temperature effect, temperature
It is bigger to spend more high resistance, with heating Wen Sheng, resistance rises heating power and declines, and the temperature of catalyst tends to be constant, catalysis combustion
It burns and realizes constant temperature at ideal 250-400 DEG C.
Claims (8)
1. a kind of volatile organic matter heatable catalytic combustion reactor, it is characterised in that：It includes heater and is wrapped in heating
Catalyst layer on device outer wall；The heater is tube heater or is rod heater.
2. volatile organic matter heatable catalytic combustion reactor according to claim 1, it is characterised in that：The tubular type
Heating tube in heater or rod heater（1）Or heating rod（11）Material be 06Cr19Ni10,1Cr18Ni9Ti,
0Cr25Ni20, silicon carbide（SiC）, aluminium oxide（Al2O3）, activated alumina, graphite, molybdenum disilicide, thermistor ceramics（PTC）
Or one kind in quartz.
3. volatile organic matter heatable catalytic combustion reactor according to claim 1, it is characterised in that：The catalysis
Oxidant layer is the mottled of continuous, intermittent annulus, intermittent silk screen or dispersion.
4. volatile organic matter heatable catalytic combustion reactor according to claim 1, it is characterised in that：The tubular type
The shape of heater is round, more prismatic or ellipse.
5. volatile organic matter heatable catalytic combustion reactor according to claim 1, it is characterised in that：The bar type
The shape of heater is plate shaped, wire mesh shape, honeycombed or fin shape.
6. implementing a kind of combustion method of volatile organic matter heatable catalytic combustion reactor described in claim 1, feature
It is：By plating, chemical plating, coating or casing by platinum（Pt）Or palladium（Pd）Catalyst layer one（2）It is attached to tubular type heating
Heating tube in device（1）Outer wall on, by heating tube（1）It is placed in the space containing VOCs exhaust gas；Height is passed through into heating tube
Warm flue gas hot fluid is heated, and heating tube wall is heated, and heat is transmitted on catalyst layer, when the temperature of catalyst reaches
When the temperature of suitable catalyst burning, the VOCs molecules in exhaust gas are adsorbed to catalyst layer one（2）Surface, and then in catalyst
Catalysis is lower to occur catalysis burning.
7. implementing a kind of combustion method of volatile organic matter heatable catalytic combustion reactor described in claim 1, feature
It is：By plating, chemical plating, coating or casing by platinum（Pt）Or palladium（Pd）Catalyst layer two（12）It is attached to bar type heating
The electrically heated rod of device（11）Outer wall on, by electrically heated rod be placed in the space containing VOCs exhaust gas in, to heating rod be powered carry out
Heating, after heating rod is heated, heat is transmitted on catalyst layer, when the temperature of catalyst layer reaches the temperature of suitable catalyst burning
When spending, the volatile organic matter VOCs molecules in exhaust gas are adsorbed to catalyst layer two（12）Surface, and then urging in catalyst
Change lower generation catalysis burning.
8. combustion method according to claim 7, it is characterised in that：The heating rod is using thermistor ceramics（PTC）
Heater, for heating rod under Curie temperature effect, temperature more high resistance is bigger, and with heating Wen Sheng, resistance rises heating power
Decline, catalyst temperature tends to be constant, and constant temperature is realized in catalysis burning at 250-400 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810175942.1A CN108397782A (en) | 2018-03-02 | 2018-03-02 | A kind of volatile organic matter heatable catalytic combustion reactor and its method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810175942.1A CN108397782A (en) | 2018-03-02 | 2018-03-02 | A kind of volatile organic matter heatable catalytic combustion reactor and its method |
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| CN108397782A true CN108397782A (en) | 2018-08-14 |
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| CN201810175942.1A Pending CN108397782A (en) | 2018-03-02 | 2018-03-02 | A kind of volatile organic matter heatable catalytic combustion reactor and its method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109185902A (en) * | 2018-09-18 | 2019-01-11 | 华南理工大学 | Gas phase catalytic organism combustion method and device based on two-dimentional zeolite catalyst |
| CN109404940A (en) * | 2018-10-19 | 2019-03-01 | 浙江工业大学 | A kind of catalyst converter of quick start organic exhaust gas degradation |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1064822A (en) * | 1991-03-08 | 1992-09-30 | 松下电器产业株式会社 | Caltalyst and manufacture method thereof |
| CN1670434A (en) * | 2004-12-29 | 2005-09-21 | 上海交通大学 | Oil smoke catalytic decomposition treating apparatus for range hoods |
| CN104998542A (en) * | 2015-08-10 | 2015-10-28 | 广东美的制冷设备有限公司 | Electric heating device with catalytic coating and preparation method and application thereof |
| CN105545428A (en) * | 2014-10-28 | 2016-05-04 | 揖斐电株式会社 | Electrically heated catalytic converter |
-
2018
- 2018-03-02 CN CN201810175942.1A patent/CN108397782A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1064822A (en) * | 1991-03-08 | 1992-09-30 | 松下电器产业株式会社 | Caltalyst and manufacture method thereof |
| CN1670434A (en) * | 2004-12-29 | 2005-09-21 | 上海交通大学 | Oil smoke catalytic decomposition treating apparatus for range hoods |
| CN105545428A (en) * | 2014-10-28 | 2016-05-04 | 揖斐电株式会社 | Electrically heated catalytic converter |
| CN104998542A (en) * | 2015-08-10 | 2015-10-28 | 广东美的制冷设备有限公司 | Electric heating device with catalytic coating and preparation method and application thereof |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109185902A (en) * | 2018-09-18 | 2019-01-11 | 华南理工大学 | Gas phase catalytic organism combustion method and device based on two-dimentional zeolite catalyst |
| CN109185902B (en) * | 2018-09-18 | 2024-02-02 | 华南理工大学 | Gas-phase organic matter catalytic combustion method and device based on two-dimensional zeolite catalyst |
| CN109404940A (en) * | 2018-10-19 | 2019-03-01 | 浙江工业大学 | A kind of catalyst converter of quick start organic exhaust gas degradation |
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Application publication date: 20180814 |
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