CN207688129U - Reforming furnace fuel gas reformer - Google Patents
Reforming furnace fuel gas reformer Download PDFInfo
- Publication number
- CN207688129U CN207688129U CN201721367833.7U CN201721367833U CN207688129U CN 207688129 U CN207688129 U CN 207688129U CN 201721367833 U CN201721367833 U CN 201721367833U CN 207688129 U CN207688129 U CN 207688129U
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- CN
- China
- Prior art keywords
- fuel gas
- preheater
- precision processing
- gas
- preheating
- 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.)
- Withdrawn - After Issue
Links
- 239000002737 fuel gas Substances 0.000 title claims abstract description 120
- 238000002407 reforming Methods 0.000 title claims abstract description 30
- 238000010438 heat treatment Methods 0.000 claims abstract description 53
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 32
- 239000003546 flue gas Substances 0.000 claims abstract description 32
- 239000007789 gas Substances 0.000 claims description 20
- 239000000779 smoke Substances 0.000 claims description 14
- 230000005855 radiation Effects 0.000 claims description 9
- 239000002918 waste heat Substances 0.000 claims description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- 238000006477 desulfuration reaction Methods 0.000 claims 1
- 230000023556 desulfurization Effects 0.000 claims 1
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 abstract description 12
- 239000000446 fuel Substances 0.000 abstract description 7
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 abstract description 6
- 230000007797 corrosion Effects 0.000 abstract description 5
- 238000005260 corrosion Methods 0.000 abstract description 5
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 abstract description 4
- 238000002485 combustion reaction Methods 0.000 abstract description 3
- 230000007423 decrease Effects 0.000 abstract description 2
- 238000000605 extraction Methods 0.000 abstract 1
- 206010022000 influenza Diseases 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 235000019504 cigarettes Nutrition 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 238000006057 reforming reaction Methods 0.000 description 2
- 241000790917 Dioxys <bee> Species 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 239000005864 Sulphur Substances 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 239000003502 gasoline Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- -1 nitrogenous compound Chemical class 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
Landscapes
- Chimneys And Flues (AREA)
Abstract
The utility model embodiment provides reforming furnace fuel gas reformer, and fuel gas carries out level-one preheating and two level preheating before entering reforming furnace；Level-one exchanges heat fuel gas and the flue gas of extraction when preheating in the first preheater；Fuel gas is passed through secondary fuel gas preheating unit again and carries out two level preheating；Fuel gas after two-stage is preheated is passed through fuel gas precision processing unit and carries out precision processing, then is passed through burner combustion.The utility model utilizes the high-temperature flue gas pre-heating fuel gas into convection section, reduces the amount with fuel gas producing steam, improves energy utilization efficiency；Meanwhile fuel gas being preheated to the temperature for meeting precision processing, it solves the problems, such as the corrosion of sulfuric acid at dew point after thermal efficiency of heating furnace improves, sulfur dioxide excessive problem when the rough desulphurization system of fuel fluctuates can also be solved, and further decrease the concentration of emission of nitrogen oxides.
Description
Technical field
The utility model belongs to petrochemical industry reforming technique field, more particularly to a kind of reformation of reforming furnace fuel gas
Device.
Background technology
Reformer is the important device in petrochemical plant, main to produce high-quality gasoline and by-product hydrogen.It reforms
Reaction is strong endothermic reaction, needs to provide heat using more heating furnaces for reforming reaction and product separation.Wherein, reforming reaction
It is commonly referred to as reformer that device, which feeds heating furnace,.The modular design of reformer is that four heating furnaces are merged into a large-scale gate-type
Heating furnace, intermediate wall with flues or air wall are separated out four radiation chambers, are interfered with each other to avoid temperature.The boiler tube of each radiation chamber is more
Road is in parallel, and the entrance of each branch pipe is connected with the large set pipe outside stove.The high-temperature flue gas of radiation chamber is common right into one
Section is flowed, waste heat boiler is set in convection section, recycles the heat of the high-temperature flue gas come out from radiation chamber, generates middle pressure steam, device
Interior steam consumption is less, defeated outside a large amount of steam, less economical with fuel gas producing steam.
Currently, with industry energy conservation, the continuous improvement of environmental requirement, discharge of the enterprise to thermal efficiency of heating furnace and pollutant
Higher requirements are also raised for concentration.Heating furnace exhaust gas temperature is reduced, Mist heat recovering is to improve having for thermal efficiency of heating furnace
Efficacious prescriptions case, but low-temperature flue gas dew point corrosion problem is to restrict the critical issue of party's scheme.In addition, the fuel gas of reformer comes from
Although the fuel gas of the fuel gas pipe network of refinery, pipe network has already passed through bulk processing, but in fuel bulk processing system performance fluctuations work
Under condition, direct Air-pollution From Combustion discharge is still difficult to meet the requirement of newest environmental protection standard.In the prior art, fuel gas precision processing skill
Art is to solve the problems, such as low-temperature flue gas dew point corrosion and the exceeded effective ways of pollutant emission, but fuel gas precision processing technology needs
Higher temperature, essence can not be preheated to by fuel gas by relying solely on 150 ~ 190 DEG C of the flue gas that reforming furnace convection current is ejected
Treatment temperature cannot achieve the precision processing of fuel gas.
Utility model content
To be solved in the utility model is that the fuel gas of reforming furnace preheats insufficient technology under precision processing technique and asks
Topic, in order to solve the above technical problems, the utility model embodiment provides a kind of reformer, including reforming furnace and fuel
Gas precision processing unit, the reforming furnace include burner, radiation chamber, convection section and chimney, the fuel gas precision processing list
Member is arranged in fuel gas access, is connected to the burner front end；At the fuel gas essence in the fuel gas access
Unit front end is managed, primary fuel gas preheating unit and secondary fuel gas preheating unit are disposed with along fuel gas conveying direction,
Wherein：The primary fuel gas preheating unit is the first preheater, and the smoke inlet of first preheater passes through the first hot cigarette
Road is connected at the top of the convection section, and the exhanst gas outlet of first preheater is connected to the chimney by cold smoke road.
Preferably, the secondary fuel gas preheating unit is the second preheater；The exhanst gas outlet of second preheater is logical
Flue is subcooled and is connected to the chimney.
As further preferably one of, the position before waste heat boiler is provided with convection section cigarette in the convection section flue gas
Gas exports, and the smoke inlet of second preheater is connected to the convection section exhanst gas outlet by the second heating flue.
As further preferred two, the smoke inlet of second preheater is connected to the reformation by third heating flue
High-temperature flue gas source except heating furnace.
It is another preferably, the secondary fuel gas preheating unit be electric heater.
It is another preferably, the fuel gas precision processing unit be desulfurizer and/or nitrogen rejection facility.
As the preferred of preceding solution, the chimney is arranged at the top of the convection section.
It is another preferably, chimney landing, which is arranged, to be simultaneously connected by the 4th heating flue with the convection section.
The above-mentioned technical proposal of the utility model embodiment has the beneficial effect that：
1. fuel gas preheating temperature to fuel gas can be met to the temperature of precision processing, to solve thermal efficiency of heating furnace
Dew point corrosion problem after raising；
2. the zero-emission of sulfur dioxide may be implemented by the precision processing of fuel gas, solves the rough desulphurization system of fuel
Sulfur dioxide excessive problem when fluctuation；
3. the concentration of emission of nitrogen oxides can be further decreased by the precision processing of fuel gas；
4. by using the high-temperature flue gas pre-heating fuel gas for entering convection section, reduce the exhaust gas volumn into waste heat boiler,
Reduce the waste with exotic fuels gas producing steam, improves the economy of device.
Description of the drawings
Fig. 1 is one reforming furnace fuel gas reformer work flow diagram of the utility model embodiment；
Fig. 2 is that the utility model embodiment two reforms furnace fuel gas reformer work flow diagram；
Fig. 3 is the utility model embodiment tri-reforming furnace fuel gas reformer work flow diagram.
［ main element symbol description ］
1- burners；2- radiation chambers；3- convection sections；31- convection section exhanst gas outlets；4- chimneys；5- fuel gas precision processing lists
Member；The first preheaters of 6-；The second preheaters of 7-；8- high-temperature flue gas source；9- electric heaters；S- fuel gas pipe networks；T- fuel gas is logical
Road；C- cold smokes road；The first heating flues of h1-；The second heating flues of h2-；H3- third heating flues；The 4th heating flues of h4-；V- control valves；
B- baffles.
Specific implementation mode
The utility model is directed to existing problem, provides reforming furnace fuel gas pre-heating mean and reformer, can have
Effect solves the problems, such as that the fuel gas of reforming furnace preheats deficiency under precision processing technique.To make skill to be solved in the utility model
Art problem, technical solution and advantage are clearer, are described in detail below in conjunction with the accompanying drawings and the specific embodiments.
In order to realize that above-mentioned technical proposal, the embodiments of the present invention provide a kind of reforming furnace fuel gas preheating
Method：Before fuel gas enters reforming furnace burning, fuel gas is first subjected to two-stage preheating, including level-one preheats and two level is pre-
Heat, then precision processing is carried out to the fuel gas after two-stage preheats, the fuel gas after precision processing is passed through reforming furnace later
It burns；Wherein, level-one preheating is that the flue gas drawn using the reforming furnace convection section is exchanged heat with fuel gas, real
Now to the heating of fuel gas.
In order to which above-mentioned technical proposal is better achieved, the utility model additionally provides a kind of reforming furnace fuel gas reformation
Device, including reforming furnace and fuel gas precision processing unit 5, reforming furnace include burner 1, radiation chamber 2, convection section 3
With chimney 4, fuel gas precision processing unit 5 is arranged in fuel gas access t, is connected to 1 front end of burner；In fuel gas access t
In 5 front end of fuel gas precision processing unit, be disposed with primary fuel gas preheating unit and two level along fuel gas conveying direction
Fuel gas preheating unit, wherein：Primary fuel gas preheating unit is the first preheater 6, and the smoke inlet of the first preheater 6 passes through
First heating flue h1 connections convection section, 3 top, the exhanst gas outlet of the first preheater 6 are connected to chimney 4 by cold smoke road c.
In above-mentioned technical proposal, fuel gas can be natural gas or gas；Fuel gas precision processing unit 5 be desulfurizer and/
Or nitrogen rejection facility；Burner 1 can be with choice arrangement in the furnace bottom of reforming furnace, side wall or furnace roof position；Convection section 3 can select
Setting is selected at 2 top of radiation chamber, setting can also be landed.
Embodiment one
As shown in Figure 1, being provided with two-stage fuel gas preheating unit, 6 He of respectively the first preheater on fuel gas access t
Second preheater 7.It is passed through the first preheater 6 from 3 Base top contact flue gas of convection section by the first heating flue h1, and from fuel gas
The fuel gas of pipe network s is once exchanged heat；Convection section exhanst gas outlet is set into the position before waste heat boiler in 3 flue gas of convection section
31, it therefrom draws flue gas and the second preheater 7 is passed through by the second heating flue h2, secondary heat exchange is carried out with fuel gas.In the first heat
Baffle b is set on flue h1, is adjusted to being passed through 6 exhaust gas volumn of the first preheater；It may also set up and change on the second heating flue h2
Similar baffle, control are passed through the exhaust gas volumn of the second preheater 7.Fuel gas after preheating be passed through fuel gas precision processing unit 5 into
Row precision processing, treated, and fuel gas is passed through the burning of burner 1；Flue gas after heat exchange is passed through chimney 4 through cold smoke road c and is discharged.Combustion
Pass through fuel gas access between material gas pipe network s, the first preheater 6, the second preheater 7, fuel gas precision processing unit 5, burner 1
T connections, fuel gas access t are equipped with control valve v, and the fuel tolerance to being passed through burner is adjusted.Chimney 4 may be provided at pair
3 top of section is flowed, setting can also be landed.When chimney 4, which lands, to be arranged, pass through the 4th heating flue h4 between convection section 3 and chimney 4
It connects, may also set up baffle on the 4th heating flue h4, flue opening and closing can be controlled as needed.It, need not be pre- under special operation condition
When hot fuel gas, the baffle b on the first heating flue h1 can be closed, and simultaneously closes off the baffle on the second heating flue h2, makes convection current
The flue gas of section 3 is directly discharged by chimney 4.
Embodiment two
Difference lies in two level preheating does not utilize position to the present embodiment reforming furnace fuel gas pre-heating mean with embodiment one
High-temperature flue gas waste heat in the reforming furnace of rear end, but use other high temperature cigarettes in addition to the reforming furnace of rear end
The high-temperature flue gas that air source provides exchanges heat to heat fuel gas with fuel gas.
As shown in Fig. 2, the two-stage fuel gas preheating unit being arranged on fuel gas access t is similarly 6 He of the first preheater
Second preheater 7 utilizes fume afterheat to realize that fuel gas preheats with fuel gas heat exchange.It is logical from 3 Base top contact flue gas of convection section
It crosses the first heating flue h1 and is passed through the first preheater 6, once exchanged heat with the fuel gas from fuel gas pipe network s；By other height
Warm flue gas source 8 is connect by third heating flue h3 with the second preheater 7, and high-temperature flue gas enters second in advance by third heating flue h3
Hot device 7 exchanges heat with the fuel gas after the preheating of the first preheater.Baffle is may also set up on third heating flue h3, to entering
The exhaust gas volumn of two preheaters 7 is adjusted.Fuel gas after heat exchange is passed through fuel gas precision processing unit 5 and carries out precision processing, processing
Fuel gas afterwards is passed through the burning of burner 1, and the flue gas after heat exchange is passed through chimney 4 through cold smoke road c and is discharged.It is similar with embodiment one,
Chimney 4 may be provided at 3 top of convection section, can also land setting.When chimney 4, which lands, to be arranged, between convection section 3 and chimney 4
By the 4th heating flue h4 connections, baffle is may also set up on the 4th heating flue h4, flue opening and closing can be controlled as needed.Special
When not needing pre-heating fuel gas under operating mode, the baffle b on the first heating flue h1 can be closed, and is simultaneously closed off on third heating flue h3
Baffle, so that the flue gas of convection section 3 is directly discharged by chimney 4.
Embodiment three
Difference lies in two level preheating is no longer sharp for the present embodiment reforming furnace fuel gas pre-heating mean and previous embodiment
With high-temperature flue gas waste heat, but fuel gas is directly heated using electrically heated mode.
As shown in figure 3, being also provided with two-stage fuel gas preheating unit on fuel gas access t, wherein level-one preheating device
For the first preheater 6, it is passed through the first preheater 6 from 3 Base top contact flue gas of convection section by the first heating flue h1, and from fuel
The fuel gas of gas pipe network s exchanges heat；Secondary fuel gas preheating unit be electric heater 9, will in the first preheater 6 with flue gas
The fuel gas exported after heat exchange is passed through progress two level preheating, the fuel gas after heating in electric heater 9 and is passed through fuel gas precision processing
Unit 5 carries out precision processing, and treated, and fuel gas is passed through the burning of burner 1；Flue gas after heat exchange is passed through chimney 4 through cold smoke road c
Discharge.Similar with previous embodiment, chimney 4 may be provided at 3 top of convection section, can also land setting.It is arranged when chimney 4 lands
When, by the 4th heating flue h4 connections between convection section 3 and chimney 4, baffle is may also set up on the 4th heating flue h4, it can be according to need
Control flue opening and closing.When not needing pre-heating fuel gas, electric heater 9 is closed, and close the baffle on the first heating flue h1
B makes the flue gas of convection section 3 be directly discharged by chimney 4.
The utility model by pre-heating fuel gas to the temperature for meeting precision processing requirement, by fuel gas precision processing from root
The corrosion of sulfuric acid at dew point after thermal efficiency of heating furnace improves is solved the problems, such as in sheet；And solve dioxy when the rough desulphurization system of fuel fluctuates
Change sulphur excessive problem, and reduce the part nitrogen oxides that nitrogenous compound burning generates, further decreases the row of nitrogen oxides
Put concentration；In addition, because poor with fuel gas generation steam economy, it is few under the conditions of the identical thermal efficiency for reforming furnace
Producing steam can increase economic efficiency, and the utility model may be used also by using the high-temperature flue gas pre-heating fuel gas for entering convection section
With the reduction amount of fuel gas producing steam, energy utilization efficiency is improved.
For above-mentioned the embodiments of the present invention, the common sense such as well known concrete structure and characteristic are not made excessively in scheme
Description；Each embodiment is described by the way of progressive, and involved technical characteristic is not constituted between each other in each embodiment
It can be combined with each other under the premise of conflict, just to refer each other for identical similar portion between each embodiment.
In technical solutions of the utility model, term " level-one ", " two level ", " first ", " second " are only used for the mesh described
, it is not understood to indicate or imply relative importance.
The above is preferred embodiments of the present invention, it is noted that for the ordinary skill of the art
For personnel, under the premise of not departing from principle described in the utility model, it can also make several improvements and retouch, these improvement
It also should be regarded as falling into the scope of protection of the utility model with retouching.
Claims (8)
1. a kind of reformer, including reforming furnace and fuel gas precision processing unit（5）, the reforming furnace includes burning
Device（1）, radiation chamber（2）, convection section（3）And chimney（4）, the fuel gas precision processing unit（5）It is arranged in fuel gas access（t）
In, it is connected to the burner（1）Front end；It is characterized in that：
In the fuel gas access（t）In the fuel gas precision processing unit（5）Front end is set successively along fuel gas conveying direction
It is equipped with primary fuel gas preheating unit and secondary fuel gas preheating unit, wherein：The primary fuel gas preheating unit is first
Preheater（6）, first preheater（6）Smoke inlet pass through the first heating flue（h1）It is connected to the convection section（3）Top,
First preheater（6）Exhanst gas outlet pass through cold smoke road（c）It is connected to the chimney（4）.
2. reformer according to claim 1, which is characterized in that the secondary fuel gas preheating unit is the second preheating
Device（7）；Second preheater（7）Exhanst gas outlet pass through cold smoke road（c）It is connected to the chimney（4）.
3. reformer according to claim 2, which is characterized in that in the convection section（3）Flue gas into waste heat boiler it
Preceding position is provided with convection section exhanst gas outlet（31）, second preheater（7）Smoke inlet pass through the second heating flue
（h2）It is connected to the convection section exhanst gas outlet（31）.
4. reformer according to claim 2, which is characterized in that second preheater（7）Smoke inlet pass through
Third heating flue（h3）It is connected to the high-temperature flue gas source except the reforming furnace（8）.
5. reformer according to claim 1, which is characterized in that the secondary fuel gas preheating unit is electric heater
（9）.
6. reformer according to claim 1, which is characterized in that the fuel gas precision processing unit（5）It is filled for desulfurization
It sets and/or nitrogen rejection facility.
7. reformer according to any one of claims 1 to 6, which is characterized in that the chimney（4）It is arranged described right
Flow section（3）Top.
8. reformer according to any one of claims 1 to 6, which is characterized in that the chimney（4）Landing is arranged and leads to
Cross the 4th heating flue（h4）With the convection section（3）It is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721367833.7U CN207688129U (en) | 2017-10-23 | 2017-10-23 | Reforming furnace fuel gas reformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721367833.7U CN207688129U (en) | 2017-10-23 | 2017-10-23 | Reforming furnace fuel gas reformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207688129U true CN207688129U (en) | 2018-08-03 |
Family
ID=62989042
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721367833.7U Withdrawn - After Issue CN207688129U (en) | 2017-10-23 | 2017-10-23 | Reforming furnace fuel gas reformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207688129U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107940461A (en) * | 2017-10-23 | 2018-04-20 | 上海浩用节能工程有限公司 | Reforming furnace fuel gas pre-heating mean and reformer |
-
2017
- 2017-10-23 CN CN201721367833.7U patent/CN207688129U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107940461A (en) * | 2017-10-23 | 2018-04-20 | 上海浩用节能工程有限公司 | Reforming furnace fuel gas pre-heating mean and reformer |
| CN107940461B (en) * | 2017-10-23 | 2024-08-13 | 上海浩用工业炉有限公司 | Fuel gas preheating method for reforming heating furnace and reforming device |
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Granted publication date: 20180803 Effective date of abandoning: 20240813 |
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