CN203816602U - Furnace tube of energy-saving type steam reforming - Google Patents
Furnace tube of energy-saving type steam reforming Download PDFInfo
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- CN203816602U CN203816602U CN201420074043.XU CN201420074043U CN203816602U CN 203816602 U CN203816602 U CN 203816602U CN 201420074043 U CN201420074043 U CN 201420074043U CN 203816602 U CN203816602 U CN 203816602U
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- process gas
- gas outlet
- catalyst
- energy
- escape pipe
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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
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Abstract
The utility model relates to a furnace tube of an energy-saving type steam reforming. The furnace tube comprises a tube body, an upper flange and a lower flange, wherein the upper flange and the lower flange are connected to the two ends of the tube body and used for sealing; a process gas inlet and a process gas outlet are respectively formed in the upper part of the tube body, and the tube body is filled with a catalyst; the process gas inlet is higher than the process gas outlet, and the process gas outlet extends to the bottom of the tube body via the catalyst through a gas outlet pipe; the upper border of the catalyst is lower than the process gas inlet and higher than the process gas outlet, and the lower border of the catalyst is higher than the lower end opening of the gas outlet pipe. As the process gas inlet and the process gas outlet are formed in the upper part of the tube body, then the gas outlet pipe arranged in the middle part of the catalyst is utilized to form a countercurrent discharging loop of gas in the tube body, and meanwhile the carried heat is released to an inner-layer catalyst reaction zone with a relatively low temperature so as to realize heat recycle. The gas outlet pipe also serves as a heat exchanger, the purpose of fuel conservation is reached, the reaction temperature of a catalyst bed is optimized, and the temperature of the process gas outlet is lowered. The furnace tube is protected, the service life is prolonged, and the cost is reduced.
Description
Technical field
The utility model relates to the converting furnace in ammonia processed or hydrogen producer, is specially a kind of energy-saving steam converting furnace.
Background technology
Steam reformer is the main equipment of natural gas steam-reforming preparing synthetic gas.It is to make natural gas and vapour mixture change into the synthesis gas that is rich in hydrogen, carbon monoxide, carbon dioxide by conversion tube.And steam reformer boiler tube can either be used for the stage-one converter for synthesizing ammonia taking natural gas as raw material, also can be used in the hydrogen manufacturing conversion furnace of methanol device and other hydrocarbon steam conversion device; In prior art, conversion tube is heated by external radiation, and nickel-containing catalyst is housed in pipe, and the gas passing into from top absorbs heat on one side in conversion tube, is carrying out chemical reaction on one side and is discharging from bottom; Each root boiler tube is exactly a conversion reactor of directly accepting flame heating, due to the particularity of conversion tube reaction, the temperature of its air inlet can reach 450 DEG C, and the temperature of gas outlet can reach 850 DEG C, and the temperature of whole reburner burner hearth especially can be up to 1100 DEG C.Therefore in its production and application process, the consumption of fuel and the loss of boiler tube have accounted for the overwhelming majority of production cost.
In prior art due to adopt be upper air by catalyst action after under the conversion tube realization response of giving vent to anger, realization response needs very high temperature in addition, therefore it cannot reduce the thermal loss of taking away from gas outlet and waste all the time, thermodynamic efficiency is low; And also very easily cause conversion tube overheated and occur creep rupture, reduce service life, increase production cost; And due to reaction cause catalyst use time inside and outside temperature difference large, easily analyse charcoal, catalyst surface causes catalysqt deactivation after being covered by carbon.
Utility model content
For problems of the prior art, the utility model provides a kind of energy-saving steam converting furnace, can realize making full use of of heat, reduce air outlet temperature, the balanced catalyst temperature difference, has reduced the demand of external heating load, save heating fuel, energy-efficient.
The utility model is to be achieved through the following technical solutions:
The utility model energy-saving steam converting furnace comprises body, and is connected to upper flange and the lower flange of body two ends for sealing; The top of body is respectively arranged with process gas import and process gas outlet, and body inside is filled with catalyst; Process gas import arranges higher than process gas outlet, and process gas outlet extends to body bottom by escape pipe from catalyst middle part; The coboundary of catalyst is lower than process gas import and higher than process gas outlet, lower boundary is higher than the lower port of escape pipe.
Preferably, the lower boundary of catalyst is limited by the thermal insulation board that is arranged on lower flange inner side; Between thermal insulation board and escape pipe lower port, be gap and arrange, the width in gap is less than the diameter of catalyst monomer.
Further, the upper surface of thermal insulation board is provided with bulge loop, and lower surface correspondence is provided with groove; Bulge loop top bracketing catalyst, bulge loop inside and escape pipe lower port matched in clearance; Groove was fixed with nested cooperation radially inside lower flange.
Further again, thermal insulation board is made up of thermal insulation ceramics.
Preferably, body outer upper is provided with hanger, and hanger is and is arranged vertically with technique air inlet and technique gas outlet respectively on cross section.
Further, technique air inlet and technique gas outlet are 180 ° of layouts on cross section.
Further again, technique air inlet connects import concetrated pipe by pigtail, and technique gas outlet is by pigtail connection outlet concetrated pipe.
Preferably, escape pipe inside pipe wall is provided with spiral baffling line or helical baffles.
Compared with prior art, the utlity model has following useful technique effect:
The utility model is by importing and exporting process gas to be all arranged on body top, then utilize the escape pipe that is arranged on catalyst middle part to form the discharge loop of gas in body, gas carries a large amount of heat adverse current from escape pipe and discharges after catalyst reaction from process gas import, the heat carrying is discharged to the lower catalyst reaction district of internal layer temperature through escape pipe simultaneously, realize the recycling to temperature, escape pipe plays the effect of heat exchanger simultaneously, complete the trans-utilization to waste heat, reach fuel-saving object, and optimize catalyst bed reaction temperature, reduce process gas outlet temperature, indirectly reach the effect of protection boiler tube, also extended its service life, reduce production cost.
Further, by spiral baffling line or helical baffles are set in escape pipe, can increase contact area and the action time of process gas and escape pipe, augmentation of heat transfer efficiency, improves waste heat recovery amount.
Further; can prevent the quadratic loss of heat by thermal insulation board is set, and protect lower flange, prevent that lower flange is excessively heated and cause service life and functional reliability to reduce; while can realize the lower boundary of catalyst spacing, plays the effect of catalyst pallet.
Further, the chamber that utilizes bulge loop and escape pipe lower port to form can ensure that the gathering of process gas refluxes, and for thermal insulation board provides the space of expanding and sliding, has guaranteed the unobstructed smoothly of gas backstreaming, has avoided the loss of catalyst with gas.
Further, by the distribution configuration to hanger and process gas import and export, and connect setting, can better optimize cooperation to its structure and connection realization, conveniently process, install and coordinate, compact conformation, easy to maintenance.
Brief description of the drawings
Fig. 1 is the cutaway view of structure described in the utility model example.
Fig. 2 is the top view of Fig. 1.
In figure: body 1, upper flange 2, lower flange 3, process gas import 4, process gas outlet 5, catalyst 6, escape pipe 7, thermal insulation board 8, hanger 9, pigtail 10, import concetrated pipe 11, outlet header 12.
Detailed description of the invention
Below in conjunction with specific embodiment, the utility model is described in further detail, described in be to explanation of the present utility model instead of restriction.
The utility model energy-saving steam converting furnace, as shown in Figure 1, it comprises body 1, and is connected to upper flange 2 and the lower flange 3 of body 1 two ends for sealing; The top of body 1 is respectively arranged with process gas import 4 and process gas outlet 5, and body 1 inside is filled with catalyst 6; Process gas import 4 arranges higher than process gas outlet 5, and process gas outlet 5 is extended only body 1 bottom by escape pipe 7 from catalyst 6 middle parts; The coboundary of catalyst 6 is lower than process gas import 4 and higher than process gas outlet 5, lower boundary is higher than the lower port of escape pipe 7.Catalyst 6 between body 1 and escape pipe 7 is for carrying out catalysis acceleration to the pyroreaction of process gas, escape pipe 7 is realized internal heat exchange for external gas transmission time, in flowing out after process gas transforms, pass in the reaction zone of the catalyst 6 of escape pipe 7 outsides transforming used heat, realize the effect that the external fuel burning heat that provides is provided, homogenizing the distribution of body 1 inner catalyst 6 bed reaction temperatures, thereby reduce the temperature of body 1, protect overall furnace tube structure stable, extend service life, can reduce the selection of body 1 and make requirement, not pressure-bearing of escape pipe simultaneously, and the slip clearance of expanding up and down can be set, selection making requires low.
Preferably, escape pipe 7 inside pipe walls are provided with spiral baffling line or the helical baffles of augmentation of heat transfer.As shown in Figure 1, the lower boundary of catalyst 6 is limited by the thermal insulation board 8 that is arranged on lower flange 3 inner sides; Between thermal insulation board 8 and escape pipe 7 lower port, be gap and arrange, the width in gap is less than the diameter of catalyst monomer, thereby has optimized structural design, in heat insulation, has realized the support jacking of catalyst 6 spacing; The upper surface of thermal insulation board 8 is provided with bulge loop, and lower surface correspondence is provided with groove; Bulge loop top bracketing catalyst, bulge loop inside and escape pipe 7 lower port matched in clearance, formed gas collection adverse current cavity, and thermal expansion space be provided; Groove was fixed with nested cooperation radially of lower flange 3 inner sides, had ensured the safety and stability of its assembling and use.In this preferred embodiment, make explanation with thermal insulation board 8 by thermal insulation ceramics.
Preferably, as Fig. 1 and Fig. 2, body 1 outer upper is provided with hanger 9, and hanger 9 is and is arranged vertically with technique air inlet 4 and technique gas outlet 5 respectively on cross section.As shown in Figure 2, technique air inlet 4 and technique gas outlet 5 are 180 ° of layouts on cross section.As shown in Figure 1, technique air inlet 4 connects import concetrated pipe 11 by pigtail 10, and technique gas outlet 5 is by pigtail 10 connection outlet concetrated pipes 12.
The utility model is simple in structure, operate safer, can meet the requirement of steam reformer long-term operation, process gas enters boiler tube from process gas import with low-temperature condition, after entering catalyst 6 catalyzed endothermic reaction, upwards prepare to discharge from the lower port adverse current of escape pipe 7 with the condition of high temperature, after the heat exchange of escape pipe 7, be finally pooled to through pigtail 10 processing and the utilization that in outlet header 12, realize next step with middle temperature state.Both radiation-absorbing heat in whole course of reaction, also utilize self high temperature to realize the conversion of methane and lighter hydrocarbons, make to export process gas temperature lower, reduce outlet piping and design and produce difficulty, and outer heating load and fuel gas are saved, the utility model is more suitable for end burning type reburner, more can demonstrate energy-conservation characteristic; Because Outlet Gas Temperature reduces, also can, by the preheating inlet process gas of working off one's feeling vent one's spleen, bring more high-order heat in reburner, realize the utilization of more heats, realize the saving that fuel is larger.It both can be for the stage-one converter for synthesizing ammonia taking natural gas as raw material, also can be in the hydrogen manufacturing conversion furnace of methanol device and other hydrocarbon steam conversion device, and the thermal efficiency is high, compact conformation, can integral manufacturing, and installation and repairing is convenient, scale is changeable, also can make skid-mounted device; Built-in catalyst 6 is easy to loading and unloading, and the reduction of start-stop car is simple, fast, has greatly saved and has opened Parking Fee, is applicable to natural gas, casing-head gas, oven gas, lighter hydrocarbons hydrogen manufacturing, methyl alcohol, synthetic ammonia.
Claims (8)
1. energy-saving steam converting furnace, is characterized in that, comprises body (1), and is connected to upper flange (2) and the lower flange (3) of body (1) two ends for sealing; The top of body (1) is respectively arranged with process gas import (4) and process gas outlet (5), and body (1) inside is filled with catalyst (6); Process gas import (4) arranges higher than process gas outlet (5), and process gas outlet (5) extends to body (1) bottom by escape pipe (7) from catalyst (6) middle part; The coboundary of catalyst (6) is lower than process gas import (4) and higher than process gas outlet (5), lower boundary is higher than the lower port of escape pipe (7).
2. energy-saving steam converting furnace according to claim 1, is characterized in that, the lower boundary of described catalyst (6) is limited by the thermal insulation board (8) that is arranged on lower flange (3) inner side; Between thermal insulation board (8) and escape pipe (7) lower port, be gap and arrange, the width in gap is less than the diameter of catalyst monomer.
3. energy-saving steam converting furnace according to claim 2, is characterized in that, the upper surface of described thermal insulation board (8) is provided with bulge loop, and lower surface correspondence is provided with groove; Bulge loop top bracketing catalyst, bulge loop inside and escape pipe (7) lower port matched in clearance; Groove is fixed with lower flange (3) inner side nested cooperation radially.
4. according to the energy-saving steam converting furnace described in claim 2 or 3, it is characterized in that, described thermal insulation board (8) is made up of thermal insulation ceramics.
5. energy-saving steam converting furnace according to claim 1, it is characterized in that, body (1) outer upper is provided with hanger (9), and hanger (9) is and is arranged vertically with technique air inlet (4) and technique gas outlet (5) respectively on cross section.
6. energy-saving steam converting furnace according to claim 5, is characterized in that, described technique air inlet (4) and technique gas outlet (5) are 180 ° of layouts on cross section.
7. according to the energy-saving steam converting furnace described in claim 1 or 5 or 6, it is characterized in that, described technique air inlet (4) connects import concetrated pipe (11) by pigtail (10), and technique gas outlet (5) are by pigtail (10) connection outlet concetrated pipe (12).
8. energy-saving steam converting furnace according to claim 1, is characterized in that, described escape pipe (7) inside pipe wall is provided with spiral baffling line or helical baffles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420074043.XU CN203816602U (en) | 2014-02-20 | 2014-02-20 | Furnace tube of energy-saving type steam reforming |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420074043.XU CN203816602U (en) | 2014-02-20 | 2014-02-20 | Furnace tube of energy-saving type steam reforming |
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| Publication Number | Publication Date |
|---|---|
| CN203816602U true CN203816602U (en) | 2014-09-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420074043.XU Expired - Fee Related CN203816602U (en) | 2014-02-20 | 2014-02-20 | Furnace tube of energy-saving type steam reforming |
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| CN (1) | CN203816602U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103785333A (en) * | 2014-02-20 | 2014-05-14 | 刘建国 | Energy-saving steam-reforming furnace pipe |
| CN116053102A (en) * | 2022-12-31 | 2023-05-02 | 北京凯世通半导体有限公司 | A gas path structure for plasma gun |
-
2014
- 2014-02-20 CN CN201420074043.XU patent/CN203816602U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103785333A (en) * | 2014-02-20 | 2014-05-14 | 刘建国 | Energy-saving steam-reforming furnace pipe |
| CN116053102A (en) * | 2022-12-31 | 2023-05-02 | 北京凯世通半导体有限公司 | A gas path structure for plasma gun |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140910 Termination date: 20160220 |