CN109012172A - Catalyst furnace - Google Patents
Catalyst furnace Download PDFInfo
- Publication number
- CN109012172A CN109012172A CN201810788049.6A CN201810788049A CN109012172A CN 109012172 A CN109012172 A CN 109012172A CN 201810788049 A CN201810788049 A CN 201810788049A CN 109012172 A CN109012172 A CN 109012172A
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- Prior art keywords
- conversion zone
- opening
- reaction channel
- catalyst furnace
- catalyst
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/88—Handling or mounting catalysts
- B01D53/885—Devices in general for catalytic purification of waste gases
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8696—Controlling the catalytic process
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/90—Physical characteristics of catalysts
- B01D2255/904—Multiple catalysts
- B01D2255/9045—Multiple catalysts in parallel
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Chemical & Material Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- Health & Medical Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Catalysts (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
- Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)
Abstract
This application involves a kind of catalyst furnaces of gas-solid contact processing pernicious gas, catalyst furnace includes the air inlet section for sealing and being sequentially communicated, conversion zone and air outlet section, the conversion zone is arranged side by side along air flow path multiple reaction channels, it is sealed off between each reaction channel, each described reaction channel is connected to the air inlet section and the air outlet section simultaneously, each described reaction channel inner wall is equipped with catalysed particulate layer, each described reaction channel is respectively provided with the first opening close to described air inlet section one end and the second opening close to described air outlet section one end, and the inner wall of the reaction channel gradually converges to second opening from first opening.Gas generates more crossflows in the gradually convergent inner wall, and then increase the contact probability of gas Yu lee side's catalyst, improves catalytic efficiency during flowing to the described second opening from first opening.
Description
Technical field
This application involves Environmental science and technology fields more particularly to a kind of gas-solid contact to handle urging for pernicious gas
Change furnace.
Background technique
In chemical industry, the energy or automotive field, the side of gas-solid-phase catalytic reaction is mostly used for the processing of pernicious gas
Formula.Pernicious gas is with flow-like flows through the catalyst bed of solid and realizes reaction.It is as shown in Figure 1 to be catalyzed reaction principle.Generally
Using noble metal or transition state element as catalyst.An important parameter for measuring gas-solid catalysis reaction efficiency is surface area
Than i.e. pernicious gas is when by catalyst and the contact surface area of catalyst.For this purpose, catalyst is generally manufactured to particle
Shape, to increase surface area as far as possible.Granular catalyst diameter is between several to tens nanometers.
Granular catalyst will form " gully " on gas path.When gas flows through " gully ", it is located at " leeward "
Catalyst be difficult to be in contact with gas.Especially in catalyst using after a period of time, catalyst bed can be because of knot
The reasons such as crystalline substance, carbon distribution, sintering so that " gully " gradually deepens, and then influence the efficiency of gas-solid catalysis reaction.
Summary of the invention
The application proposes a kind of catalyst furnace of structure optimization, and the catalyst of lee side is improved in the way of the guidance of flow field
With the contact area of gas, catalytic efficiency is improved.The application catalyst furnace includes following technical solution:
A kind of catalyst furnace, including air inlet section, conversion zone and the air outlet section for sealing and being sequentially communicated, the conversion zone is along air-flow
Path, which is arranged side by side, multiple reaction channels, seals off between each reaction channel, each described reaction channel is equal
It is connected to the air inlet section and the air outlet section simultaneously, each described reaction channel inner wall is equipped with catalysed particulate layer, each
The reaction channel is respectively provided with close to first opening of described air inlet section one end and close to the second of described air outlet section one end
Opening, the area of first opening is greater than the area of second opening, and the inner wall of the reaction channel is from described first
Opening gradually converges to second opening.
Wherein, the air flow path of the conversion zone in linear extension, the conversion zone is also straight line path, described
Second opening is contained within first opening along the air flow path in the projection in first opening.
Wherein, any one of reaction channel is axisymmetric shape, and the symmetry axis of each reaction channel
Line extends along the direction for being parallel to the air flow path.
Wherein, on arbitrary section of the conversion zone perpendicular to the air flow path, multiple reaction channels are in bee
The arrangement of nest shape.
Wherein, the catalyst furnace further includes temperature control system, and the temperature control system includes heating tube, and the heating tube surrounds institute
The outer wall of conversion zone is stated, the heating tube at least covers the conversion zone along the air flow path.
Wherein, the temperature control system further includes heat conducting pipe, the heat conducting pipe be located at the conversion zone and the heating tube it
Between, the heat conducting pipe at least covers the conversion zone along the air flow path.
Wherein, the temperature control system further includes insulating layer, and the insulating layer surrounds the outer wall of the heating tube, the heat preservation
Layer at least covers the conversion zone along the air flow path.
Wherein, the temperature control system further includes water cooling component, and the water cooling component includes the water inlet being sealed and connected, water
Cooling layer and water outlet, the water-cooled layer are set in the insulating layer, and the water-cooled layer surrounds the heating tube, the water-cooled layer
The conversion zone is at least covered along the air flow path.
Wherein, the temperature control system further includes temperature sensor and control unit, and the temperature sensor is for incuding institute
The internal temperature of catalyst furnace is stated, described control unit is used to control the heating temperature of the heating tube or the water of the water cooling component
Flow velocity degree.
Wherein, the catalyst furnace is additionally provided with mixer, and the mixer is located at the air inlet section far from the conversion zone one
Side, the mixer are connected to the air inlet section, and the mixer is used to carry out the gas to react into the conversion zone
Premixing.
Herein described catalyst furnace forms gas by air inlet section, conversion zone and the air outlet section for sealing and being sequentially communicated
The access flowed through.By the way that multiple reaction channels of setting are isolated in the conversion zone side by side along the air flow path, gas is increased
When body flow to the air outlet section from the air inlet section with the contact area of the conversion zone.By in reaction channel described in each
Set on wall to catalysed particulate layer, realize the haptoreaction of the catalyst furnace and gas.It is flowed in gas from first opening
To second opening, gas generates more crossflows in the gradually convergent inner wall, and then increases
The contact probability of gas and lee side's catalyst, avoid because granular catalyst formed " gully " and caused by it is leeward
Place's catalyst is difficult to the defect come into full contact with gas, and then improves the catalytic efficiency of herein described catalyst furnace.
Detailed description of the invention
Fig. 1 is a kind of schematic illustration of catalysis reaction；
Fig. 2 is the schematic diagram of herein described catalyst furnace；
Fig. 3 is the schematic cross-section of herein described conversion zone；
Fig. 4 is the detailed schematic of herein described catalyst furnace；
Fig. 5 is the schematic diagram of another embodiment of herein described catalyst furnace.
Specific embodiment
Below in conjunction with the attached drawing in the embodiment of the present application, technical solutions in the embodiments of the present application carries out clear, complete
Site preparation description, it is clear that described embodiment is only a part of the embodiment of the application, instead of all the embodiments.Base
Embodiment in the application, those of ordinary skill in the art are obtained all without making creative work
Other embodiments shall fall in the protection scope of this application.
Catalyst furnace 100 shown in Fig. 2 is please referred to, including air inlet section 10, conversion zone 20 and the air outlet section 30 being sequentially communicated.Institute
It states and is tightly connected between air inlet section 10, the conversion zone 20 and the air outlet section 30, to form the air-flow for allowing gas to circulate
Path 001.Referring to Fig. 3, on the section of the conversion zone 20, being arranged side by side along the air flow path 001 has multiple reaction channels
21.Setting is sealed and is isolated between each described reaction channel 21, each described reaction channel 21 is connected to institute simultaneously
State air inlet section 10 and the air outlet section 30.Gas is to pass through when flowing from the air inlet section 10 to the air outlet section 30 as a result,
Multiple reaction channels 21 in the conversion zone 20 are realized.Such setting can increase gas and the conversion zone
20 contact area.Further, catalysed particulate layer 210 is equipped in the inner wall 211 of each reaction channel 21.Specifically
, catalyst (such as Pt/Al2O3, TiO2) is carried on by infusion process, the precipitation method, cogelled method, spray coating method, corrosion method etc.
On carrier, catalysed particulate layer 210 is formed.Each described reaction channel 21 is respectively provided with close to described 10 one end of air inlet section
Second opening 213 of the first opening 212 and close described 30 one end of air outlet section.The area of first opening 212 is greater than described
The area of second opening 213, and the inner wall 211 of the reaction channel 21 gradually converges to described the from first opening 212
Two openings 213, i.e., during the described reaction channel 21 extends from the air inlet section 10 to the air outlet section 30, area of section
Unidirectionally successively decrease.
Catalyst to the cleaning principle of pernicious gas substantially are as follows: when the pernicious gas of high temperature passes through herein described catalyst furnace
When 100, the catalyst in the catalyst furnace will enhance the activity of the pernicious gases such as CO, HC and NOx, promote it to carry out certain
Oxidationreduction chemical reaction.Wherein CO is oxidized into colourless, nontoxic carbon dioxide gas at high temperature；HC compound exists
Water (H20) and carbon dioxide are oxidized under high temperature；NOx is reduced into nitrogen and oxygen.Various pernicious gases are being made to become harmless
After gas, purification work is completed.It is typically directly arranged by purified gas outwardly, or in gas collector.Referring to
The detail view of Fig. 4, herein described catalyst furnace 100 are increasing gas and the catalysed particulate layer by the reaction channel 21
After 210 contact area, structure is further restrained by unidirectionally successively decreasing for the inner wall 211, in pernicious gas along the air-flow
During path 001 is flowed, the reflex to gas is increased, so that portion gas generates lateral flow, and then is increased
Thus contact probability at gas and particle " gully " improves so that the particle surface in lee side is also utilized
The gas-solid contacting efficiency of herein described catalyst furnace 100 is avoided and is made because of " gully " that granular catalyst is formed
At lee side's catalyst be difficult to the defect come into full contact with gas, whole catalytic efficiency is improved.
A kind of embodiment, the air flow path 001 of the conversion zone 20 in linear extension namely the conversion zone 20
It also is straight line path.Further, throwing of second opening 213 along the air flow path 001 in first opening 212
Shadow is contained within first opening 212.Continuing with reference to Fig. 4, the air flow path is being parallel in the inner wall 211
On 001 arbitrary section, first opening 212 is along the extended line of the air flow path 001 and the edge shape of the inner wall 211
At angle α, such setting can guarantee that any angle α is both formed within the extended line of first opening 212.Thus institute
It is smaller to state the leeward area that catalysed particulate layer 210 is formed in the inner wall 211, air-flow generate laterally disturbance when, air-flow with
The catalyst granules contact area of lee side is bigger.
Further, any one of reaction channel 21 is axisymmetric shape, and each described reaction channel 21
The axis of symmetry along be parallel to the air flow path 001 direction extend.Such setting on the one hand easily fabricated realization, separately
On the one hand individual difference between each reaction channel 21 is also avoided, it is whole in the easily controllable conversion zone 20 to urge
Change efficiency and optimizes.
Look at back Fig. 3, a kind of embodiment, the conversion zone 20 on the arbitrary section perpendicular to the air flow path 001,
Multiple reaction channels 21 are in honeycomb arrangement.It should be understood that honeycomb arrangement can be promoted to greatest extent it is described anti-
Quantity of the channel 21 in the conversion zone 20 is answered, the area that gas is contacted with the catalysed particulate layer is thus increased.Certainly, may be used
It is identical with the shape of second opening 213 with first opening 212 that each reaction channel 21 is arranged, so that
The reaction channel 21 is easily fabricated.Further, the cross sectional shape that each reaction channel 21 is arranged is also identical, with into
One step avoids the individual difference between each reaction channel 21.First opening 212 can be polygon, circle or ellipse
Circular arbitrary shape.And arrangement mode of the reaction channel 21 in the conversion zone 20 can be in addition to honeycomb
It is arranged in array-like, ring-type or remaining arbitrary shape, these set-up modes do not affect the scheme of herein described catalyst furnace 100
Implement.
Another embodiment is shown in Fig. 5, and purification of the catalyst to pernicious gas generally requires to reach at a certain temperature
To better effect.For this purpose, this described catalyst furnace 100 further includes temperature control system 40.The temperature control system 40 includes heating tube 41,
The heating tube 41 is used to heat for the conversion zone 20.Specifically, the heating tube 41 surrounds the outer wall of the conversion zone 20
On, the conversion zone 20 is at least completely covered along the air flow path 001 in the heating tube 41.The i.e. described heating tube 41 can be with
Part covers the air inlet section 10 or the air outlet section 30.Heating matchmaker the application of the heating tube 41 is not particularly limited, such as
The various existing heat protocols such as resistance wire, hot water, hot gas can apply to the heat protocol of the application.A kind of embodiment
In, the heating tube 41 is polycrystalline aluminosilicate material, and temperature can be promoted to ideal value faster by such material, and have compared with
Strong thermal insulation property.
A kind of embodiment shows when to avoid the heating tube 41 from being directly pasted on the conversion zone 20 in the presence of heating is uneven
As causing in the conversion zone 20 that there are the temperature difference for respective location, influencing catalytic effect, the temperature control system 40 further comprises thermally conductive
Pipe 42.The heat conducting pipe 42 is set between the conversion zone 20 and the heating tube 41, and the heat conducting pipe 42 is pasted on described
On 20 outer wall of conversion zone, the heat conducting pipe 42 at least covers the conversion zone 20 along the air flow path 001.The heating tube 41
After temperature is promoted, temperature is uniformly transferred to the conversion zone 20 by the heat conducting pipe 42, reduces the temperature difference.
Herein described catalyst furnace 100 may be longer to the catalytic action period of gas, in order to energy saving, raising institute
The temperature control efficiency of temperature control system 40 is stated, insulating layer 43 can also be arranged in the temperature control system 40.The insulating layer 43 surrounds described
The outer wall of heating tube 41, the insulating layer 43 at least cover the conversion zone 20 along the air flow path 001.The insulating layer 43
It is made of thermal insulation material, the heating tube 41 is after by the insulating layer 43 covering, the heating tube 41,42 and of the heat conducting pipe
Temperature inside the conversion zone 20 is able to the holding of longer time, avoids the unnecessary loss of thermal energy.Further, described
Insulating layer 43 can also include end cap 431, and the end cap 431 is set to the two of the heating tube 41 along the air flow path 001
At end, the end cap 431 seals the heating tube 41 and the heat conducting pipe 42, can further strengthen the effect of heat preservation.
After the heat effect of 40 long period of temperature control system, according to information such as Back end data monitorings, or according to
The change of gas componant, herein described catalyst furnace 100 improve the demand of catalytic efficiency there is likely to be temperature is turned down.It is right
For the conversion zone 20 and the heat conducting pipe 42, due to there is gas circulation inside it, the heat of part can be taken away, is realized
Certain cooling regulating effect.And for the insulating layer 43, then Temperature fall relatively difficult to achieve.For this purpose, the temperature control system
System 40 can also include water cooling component 44.The water cooling component 44 includes water inlet 441,442 and of water-cooled layer being sealed and connected
Water outlet 443.The water-cooled layer 442 is set in the insulating layer 43, mainly implements to cool down to the insulating layer 43.Such as Fig. 5
Shown, in order to realize preferable cooling effect, the water-cooled layer 442 needs to be embedded in inside the insulating layer 43, described in formation
A layer interlayer inside insulating layer 43.Correspondingly, the water-cooled layer 442 surrounds the heating tube with the insulating layer 43 together
41, the water-cooled layer 442 at least covers the conversion zone 20 along the air flow path 001 with the insulating layer 43.The water inlet
Mouth 441 is preferably set to the both ends of the conversion zone 20 with the water outlet 443 along the air flow path 001, to guarantee the water
Coolant liquid in cooling layer 442 is realized during flowing to water outlet 443 from the water inlet 441 with the insulating layer 43
More fully contact.Certainly, reasonable flow path is set inside the water cooling component 44, identical effect also may be implemented
Fruit.
A kind of embodiment, the water-cooled layer 442 are made of red copper material, have higher pyroconductivity, water can be improved
Cold efficiency.
Further, the temperature control system 40 further includes temperature sensor 45 and control unit 46.The temperature sensor 45
It is set in the conversion zone 20, the temperature sensor 46 is used to incude the internal temperature of the catalyst furnace 100, and by temperature
Information feeds back to described control unit 46.Described control unit 46 controls adding for the heating tube 41 according to the temperature information passed back
The water velocity of hot temperature or the water cooling component 44, to guarantee that the conversion zone 20 is within the scope of preferable temperature.
A kind of embodiment, the catalyst furnace 100 are additionally provided with mixer 50.The mixer 50 is connected in series with the air inlet section 10
On, the mixer 50 is located at side of the air inlet section 10 far from the conversion zone 20.The mixer 50 and the air inlet
Section 20 is connected to, and gas is first more adequately pre-mixed in the mixer 50 before entering in the conversion zone 20,
And then reach better catalytic effect after gas enters the conversion zone 20.
On the other hand, the mixer 50 can also include flow controller 51, and the flow controller 51 is for controlling
Gas flows through speed in the conversion zone 20.
Embodiments described above does not constitute the restriction to the technical solution protection scope.It is any in above-mentioned implementation
Made modifications, equivalent substitutions and improvements etc., should be included in the protection model of the technical solution within the spirit and principle of mode
Within enclosing.
Claims (10)
1. a kind of catalyst furnace, which is characterized in that described anti-including air inlet section, conversion zone and the air outlet section for sealing and being sequentially communicated
Answering section to be arranged side by side along air flow path has multiple reaction channels, seals off between each reaction channel, described in each
Reaction channel is connected to the air inlet section and the air outlet section simultaneously, each described reaction channel inner wall is equipped with catalysed particulate
Layer, each described reaction channel are respectively provided with close to first opening of described air inlet section one end and close to the air outlet section one
End second opening, it is described first opening area be greater than it is described second opening area, and the inner wall of the reaction channel from
First opening gradually converges to second opening.
2. catalyst furnace as described in claim 1, which is characterized in that institute of the conversion zone in linear extension, the conversion zone
Stating air flow path is also straight line path, and second opening is contained in along projection of the air flow path in first opening
Within first opening.
3. catalyst furnace as claimed in claim 2, which is characterized in that any one of reaction channel is axisymmetric shape, and
The axis of symmetry of each reaction channel extends along the direction for being parallel to the air flow path.
4. the catalyst furnace as described in any one of claims 1 to 3, which is characterized in that in the conversion zone perpendicular to the air-flow road
On the arbitrary section of diameter, multiple reaction channels are in honeycomb arrangement.
5. the catalyst furnace as described in any one of claims 1 to 3, which is characterized in that the catalyst furnace further includes temperature control system, described
Temperature control system includes heating tube, and the heating tube surrounds the outer wall of the conversion zone, the heating tube along the air flow path extremely
The conversion zone is covered less.
6. catalyst furnace as claimed in claim 5, which is characterized in that the temperature control system further includes heat conducting pipe, the heat conducting pipe position
Between the conversion zone and the heating tube, the heat conducting pipe at least covers the conversion zone along the air flow path.
7. catalyst furnace as claimed in claim 6, which is characterized in that the temperature control system further includes insulating layer, the insulating layer packet
The outer wall of the heating tube is enclosed, the insulating layer at least covers the conversion zone along the air flow path.
8. catalyst furnace as claimed in claim 7, which is characterized in that the temperature control system further includes water cooling component, the water cooling group
Part includes the water inlet, water-cooled layer and water outlet being sealed and connected, and the water-cooled layer is set in the insulating layer, the water cooling
Layer surrounds the heating tube, and the water-cooled layer at least covers the conversion zone along the air flow path.
9. catalyst furnace as claimed in claim 8, which is characterized in that the temperature control system further includes that temperature sensor and control are single
Member, the temperature sensor are used to incude the internal temperature of the catalyst furnace, and described control unit is for controlling the heating tube
Heating temperature or the water cooling component water velocity.
10. the catalyst furnace as described in any one of claims 1 to 3, which is characterized in that the catalyst furnace is additionally provided with mixer, described
Mixer is located at the air inlet section far from the conversion zone side, and the mixer is connected to the air inlet section, and the mixer is used
It is pre-mixed in into the gas that the conversion zone reacts.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210154623.9A CN114471151A (en) | 2018-07-18 | 2018-07-18 | Catalytic furnace |
| CN201810788049.6A CN109012172A (en) | 2018-07-18 | 2018-07-18 | Catalyst furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810788049.6A CN109012172A (en) | 2018-07-18 | 2018-07-18 | Catalyst furnace |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210154623.9A Division CN114471151A (en) | 2018-07-18 | 2018-07-18 | Catalytic furnace |
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| Publication Number | Publication Date |
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| CN109012172A true CN109012172A (en) | 2018-12-18 |
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ID=64643854
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810788049.6A Pending CN109012172A (en) | 2018-07-18 | 2018-07-18 | Catalyst furnace |
| CN202210154623.9A Pending CN114471151A (en) | 2018-07-18 | 2018-07-18 | Catalytic furnace |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210154623.9A Pending CN114471151A (en) | 2018-07-18 | 2018-07-18 | Catalytic furnace |
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Cited By (2)
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| CN111551031A (en) * | 2020-05-09 | 2020-08-18 | 中国华能集团有限公司 | Tubular furnace test system and method for catalytic oxidation of CO in coal-fired flue gas |
| CN112933959A (en) * | 2021-02-23 | 2021-06-11 | 北京石油化工学院 | Reaction device for low-temperature catalytic purification of volatile organic compounds |
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| CN112933959A (en) * | 2021-02-23 | 2021-06-11 | 北京石油化工学院 | Reaction device for low-temperature catalytic purification of volatile organic compounds |
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| CN114471151A (en) | 2022-05-13 |
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Application publication date: 20181218 |