CN2796823Y - Furnace tube of heat exchange type convertor - Google Patents
Furnace tube of heat exchange type convertor Download PDFInfo
- Publication number
- CN2796823Y CN2796823Y CN 200520030472 CN200520030472U CN2796823Y CN 2796823 Y CN2796823 Y CN 2796823Y CN 200520030472 CN200520030472 CN 200520030472 CN 200520030472 U CN200520030472 U CN 200520030472U CN 2796823 Y CN2796823 Y CN 2796823Y
- Authority
- CN
- China
- Prior art keywords
- tube
- conversion
- outer tube
- conversion tube
- heat
- 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.)
- Expired - Fee Related
Links
Images
Abstract
The utility model discloses a furnace tube of a heat exchange converter, which is mainly composed of a conversion tube (2), an outer sleeve tube (4), an inner inserting tube (3) and a catalyst (6), wherein the lower section of the conversion tube is positioned in the outer sleeve tube, and the inner inserting tube is inserted into the conversion tube; a gap is left between an open bottom on the lower end of the inner inserting tube and the closed bottom of the conversion tube; the opening upper end of the inner inserting tube extends out from the conversion tube. The catalyst is filled in the annular gap between the conversion tube and the inner inserting tube. The conversion tube is provided with a raw gas inlet pipe nozzle (8). A tube wall on the lower part of the outer sleeve tube is evenly distributed with a plurality of opening holes to form an inlet area for high-temperature fume. Each opening hole position is provided with a cocked diversion barrier chip (5) for shielding fume/flame radiation and diverting the fume. The utility model with reasonable design shields radiation of high-temperature gas outside of the outer sleeve tube on the conversion tube via the cocked diversion barrier chips, eliminates local hot spots on the conversion tube, and simultaneously changes the vertical manner for the high-temperature fume entering the outer sleeve tube into the lateral manner. In addition, the middle lower part of the furnace tube of the utility model can be directly arranged in a burning chamber, and can also be separated from the burning chamber, so the utility model has high applicable fume temperature and wide application range. The utility model has the characteristics of simple structure, safety and investment saving.
Description
Technical field
The utility model belongs to heat-exchanged reformer boiler tube technical field, relates generally to a kind of heat-exchanged reformer boiler tube.It is the reburner of thermal source that this boiler tube is applicable to the high-temperature flue gas, comprises with the natural gas hydrogen manufacturing conversion furnace of the stage-one converter for synthesizing ammonia, methyl alcohol one-stage converter and other hydro carbons steam under pressure reforming unit that are raw material.
Background technology
Hydrocarbon steam conversion has had many decades as a kind of art production process.Traditional reburner complex structure, operation requires high, and expenditure of construction costliness, the expense of reburner have accounted for whole plant investment a large portion.Kai Fa a kind of heat-exchanged reformer in recent years, be by utilize high-temperature flue gas and pyrolytic conversion gas simultaneously as thermal source heating raw gas to satisfy the needed heat of hydrocarbon steam conversion.Compare with traditional reburner, have advantages such as thermal efficiency height, fuel saving, the mitigation of reformed gas outlet temperature.
At present, be the heat-exchanged reformer boiler tube of thermal source with the high-temperature flue gas, according to the difference of heat-exchanged reformer, several forms are arranged.When heat-exchanged reformer was container type, reburner was called converter again, and its structure is similar to movable tube sheets heat exchanger, and its boiler tube is a bayonet tube, and mounting means is similar to the tubulation of floating head heat exchanger, all is enclosed in the container.This kind furnace type structure complexity, loading and unloading catalyst difficulty, elevated-temperature seal and maximization difficulty (referring to the HTCR heat-exchanged reformer of Denmark Topsoe company), separate with converter the combustion chamber of this kind reburner, boiler tube is not subjected to Fire Radiation, its boiler tube is that outer tube, conversion tube and interpolation pipe are formed coaxial arrangement by three sleeve pipes.Outer tube is shorter, is approximately 1/2 of conversion tube length, is positioned at the middle and upper part of conversion tube.Conversion tube is opened the top, is closed the bottom, and outer tube is opened the top, opened the bottom, and interpolation pipe is opened the bottom, and conversion tube and outer tube are supported respectively by the inner tube sheet of converter.The conversion tube middle and upper part is subjected between outer tube and conversion tube the convection heat transfer' heat-transfer by convection of the high-temperature flue gas that flows in the annular space, the bottom is subjected to the radiation and the convection heat transfer' heat-transfer by convection of 1000 ℃～1300 ℃ high-temperature flue gas, at this moment, the maximum temperature of the reformed gas of inside, conversion tube lower end is between 780 ℃～800 ℃, and conversion tube bottom wall temperature is very high.Therefore, this kind reburner is to the temperature control requirement strictness of high-temperature flue gas, if the flue-gas temperature overtemperature, the conversion tube temperature of lower might surpass the conversion tube maximum operation (service) temperature, and this also is one of reason why separate with boiler tube the combustion chamber.In order to reduce conversion tube bottom wall temperature; United States Patent (USP) 5429809 proposes with outer tube whole the entangling in conversion tube middle and lower part (comprising lowermost end); the shielding high-temperature gas is to the radiation of conversion tube; and have a series of small sircle hole at the outer tube lower sides; high-temperature gas enters annular space between reburner and the outer tube to the conversion tube convection heat transfer by small sircle hole; absorb the heat of outer tube simultaneously, reduce the conversion tube wall temperature, the protection conversion tube with this.Be in flue-gas temperature under 1300 ℃ the situation, do not have the conversion tube of outer tube to compare with the bottom, the conversion tube calorific intensity of above-mentioned band outer tube reduces half, has only 35000kCal/m
2.h, wall temperature has reduced about 100 ℃, has only 750 ℃, and conversion tube still can be used when flue-gas temperature surpasses 1300 ℃.But, this
The kind outer tube still has deficiency to the protection of conversion tube; the outer high-temperature gas of outer tube sees through the outer tube small sircle hole and still conversion tube is produced radiation; make the conversion tube relevant position form localized hyperthermia's point one by one; if be placed in the combustion chamber, thermal-flame is stronger to the radiation of conversion tube by small sircle hole.
When heat-exchanged reformer was non-container type heat exchange reburner, reburner was made of a series of independently bushing type boiler tubes, and each root bushing type boiler tube promptly is equivalent to a reactor.Simple in structure, characteristics (referring to United States Patent (USP) 5935531) such as catalyst loading and unloading convenient, easy realization maximization that this kind type of furnace has, the middle and lower part of its converting furnace is in the combustion chamber, its outer tube middle and lower part of the direct radiation of flame, burner is positioned at top of combustion chamber, and flame burns downwards.Its boiler tube mainly is made up of conversion tube, outer tube, interpolation pipe, coaxial arrangement, and conversion tube is opened the top, is closed the bottom, outer tube is opened the top, is opened the bottom, interpolation pipe is opened the bottom, conversion tube or slightly length concordant with the outer tube lower end, and conversion tube is in the combustion chamber external support.The boiler tube middle and lower part directly is arranged in the combustion chamber, the radiant heat of outer tube shielding thermal-flame and flue gas, protection conversion tube.High-temperature flue gas upwards flows by the annular space that outer tube bottom end opening and outer tube lower end sidewall elongated hole enter between outer tube and the conversion tube, absorbs the heat of outer tube in the time of to the conversion tube heat release.But blemish in an otherwise perfect thing is to enter that whole high-temperature flue gas of annular space all need by outer tube bottom end opening and outer tube lower end sidewall elongated hole between outer tube and the conversion tube, localized heat intensity is too high, in addition, the conversion tube of sidewall elongated hole position, corresponding outer tube lower end directly is subjected to the radiation of flame and high-temperature flue gas, might make the conversion tube hot-spot.
Summary of the invention
The purpose of this utility model provides a kind of improved heat-exchanged reformer boiler tube, and being used for the high-temperature flue gas is the casing type heat exchanging reburner of thermal source, have simple in structure, reliability is high, the flue-gas temperature height, the scope that are suitable for are wide.
The utility model is realized the technical scheme that above-mentioned purpose is taked: it is mainly by conversion tube, outer tube, interpolation pipe and catalyst constitute, the middle hypomere of conversion tube is positioned at outer tube, interpolation pipe inserts in the conversion tube, leave the gap between its lower ending opening bottom and the conversion tube closed bottom end, upper end open is stretched out conversion tube, annular space loading catalyst between conversion tube and the interpolation pipe, on conversion tube, be provided with unstripped gas inlet ozzle, be evenly distributed with a plurality of perforates on the bottom tube wall of outer tube, form high-temperature flue gas and enter the zone, be provided with the water conservancy diversion catch that is used to cover flue gas/Fire Radiation and water conservancy diversion flue gas of perk at each perforate position.
One of feature of the present utility model is: the length that the high-temperature flue gas of outer tube bottom enters the zone accounts for 5%～50% of the whole length of outer tube.High-temperature flue gas enters the annular space between outer tube and the conversion tube thus, for the conversion reaction of unstripped gas provides heat.
Two of feature of the present utility model is: the water conservancy diversion catch that the high-temperature flue gas of outer tube bottom enters the perk that the zone is provided with has effectively covered the radiation to conversion tube of thermal-flame and flue gas, and making the heat exchange between conversion tube and the high-temperature flue gas is pure convection type.
Three of feature of the present utility model is: outer tube and interpolation pipe support by conversion tube.Outer tube supports by the welding hanger on the conversion tube, and interpolation pipe supports by the reformed gas outlet bend pipe that welds on the conversion tube.When on reburner, installing, only need to support conversion tube, simple and reliable.
Four of feature of the present utility model is: interpolation pipe and reformed gas outlet bend pipe can be same homogeneous tubes.Interpolation pipe is in conversion tube, and its inside and outside differential pressure that bears is very little, so its tube wall can be very thin.Reformed gas outlet bend pipe its to stretch out the inside and outside differential pressure that bears behind the conversion tube very big, suspend interpolation pipe again in midair simultaneously, so its tube wall is thicker.If wall thickness is inconsistent, just may need to increase weld seam together between interpolation pipe and the reformed gas outlet bend pipe.If interpolation pipe and reformed gas outlet bend pipe are same homogeneous tube, wall thickness is identical, or adopts special process to make its part as interpolation pipe thinner, and is thicker as the part of reformed gas outlet bend pipe, just can remove the weld seam between interpolation pipe and the reformed gas outlet bend pipe, the security that improves boiler tube.
Compare with United States Patent (USP) 5429809, the utility model enters the water conservancy diversion catch that the zone is provided with perk by the high-temperature flue gas in the outer tube bottom, utilize the water conservancy diversion catch of perk to shield of the radiation of the outer high-temperature gas of outer tube to conversion tube, eliminated the local hot spot on the conversion tube, make mode that high-temperature flue gas enters outer tube be changed into side direction and entered by vertical entering simultaneously, it is more unobstructed to flow.In addition, the utility model boiler tube middle and lower part can directly be arranged in the combustion chamber, also can separate with the combustion chamber, and the flue-gas temperature that is suitable for is higher, and the scope of application is wider.
Compare with United States Patent (USP) 5935531, the utility model has increased the circulation area when high-temperature flue gas enters outer tube, and the area of the corresponding gas approach of conversion tube is increased, and conversion tube gas approach place calorific intensity reduces, and wall temperature descends.And the position of opening is adjustable, and the highest temperature position that can avoid conversion tube is provided with.Simultaneously outer tube not the sheet metal of opening portion and perk shielded thermal-flame and flue gas to the radiation of conversion tube, use safer.
The operation principle of heat-exchanged reformer boiler tube of the present utility model is: the unstripped gas with uniform temperature and pressure, enter the top of conversion tube from unstripped gas inlet ozzle, from top to bottom by the beds in the conversion tube, the pyrolytic conversion gas liberated heat that absorbs simultaneously in outer high-temperature flue gas of conversion tube and the interpolation pipe is finished conversion reaction generation reformed gas, reformed gas enters interpolation pipe in the conversion tube bottom by the gap of conversion tube bottom and interpolation pipe bottom, upwards flow, release heat is given unstripped gas simultaneously, and the reformed gas after the heat exchange enters reformed gas outlet bend pipe and derives from the interpolation pipe top.High-temperature flue gas enters the annular space that forms between conversion tube and the outer tube from outer tube lower sides strip gab, with the unstripped gas reverse flow, for the unstripped gas conversion reaction provides heat, derives from the outer tube top end opening after the heat exchange.
Description of drawings
Accompanying drawing 1 is the profilograph of the utility model heat-exchanged reformer boiler tube.
Accompanying drawing 2 is the utility model accompanying drawing 1A-A profile.
Accompanying drawing 3 is the enlarged drawing of the utility model accompanying drawing 1 local nodes I.
Among the figure, 1, the heat-exchanged reformer boiler tube, 2, conversion tube, 3, interpolation pipe, 4, outer tube, 5, water conservancy diversion catch, 6, catalyst, 7, the catalyst supportive grid, 8, unstripped gas inlet ozzle, 9, reformed gas outlet bend pipe, 10, the outer tube hanger, 11, the conversion tube journal stirrup, 12, flange.
The specific embodiment
In conjunction with the accompanying drawings its structure is further specified.
As shown in Figure 1, it is the reburner of thermal source that the converting furnace 1 that the utility model proposes is applicable to the high-temperature flue gas, comprises with the natural gas being heat exchange type stage-one converter for synthesizing ammonia, heat exchange type methyl alcohol one-stage converter and the conversion of other hydro carbons steam under pressure of raw material
The hydrogen manufacturing conversion furnace of device.It mainly is made of conversion tube 2, interpolation pipe 3 and outer tube 4 catalyst 6, the middle hypomere of conversion tube 2 is positioned at outer tube 4, upper end and flange 12 welding, and its upper portion side wall has two apertures, an aperture welding unstripped gas inlet ozzle 8, another aperture welding reformed gas outlet bend pipe 9.Conversion tube journal stirrup 11 is positioned at the position of conversion tube top near flange 12, supports the weight of whole converting furnace 1.Catalyst supportive grid 7 is positioned at conversion tube 2 inner bottom and conversion tube welding, and there is circular hole at its center, allows interpolation pipe 3 by circular hole free wxpansion.Interpolation pipe 3 is positioned at conversion tube 2 inside center, opens the bottom, opens the top, and the bottom is closed apart from conversion tube 2 in the bottom certain interval, and the top is connected with reformed gas outlet bend pipe 9, and makes interpolation pipe 3 be suspended on conversion tube 2 centers by reformed gas outlet bend pipe 9.Annular space between conversion tube 2 and the interpolation pipe 3 is equipped with catalyst 6, and catalyst 6 is by flange 12 loading and unloading.Outer tube 4 upper ends are positioned at the below of unstripped gas inlet ozzle 8 and reformed gas outlet bend pipe 9, by outer tube hanger 10 conversion tube 2 and outer tube 4 are connected as one.Be evenly distributed with a plurality of perforates on the tube wall of the bottom of outer tube 4, these perforates are bar holes, can also be circular hole, square hole.Perforate is along the bottom tube wall circle distribution multi-turn of outer tube 4, and every number of turns amount is 3～20, and each encloses spacing is 10～300mm.Form high-temperature flue gas thus in the bottom of outer tube 4 and enter the zone, the water conservancy diversion catch 5 that is complementary with the perforate mode that is provided with perk at each perforate position, the angle of its perk is 2 °～30 °.The water conservancy diversion catch 5 of this perk can be the perk part at outer tube 3 sidewall opening after-opening positions, it also can be the sheet metal that welds in addition, work to cover flue gas (or flame) radiation and water conservancy diversion flue gas, it is shaped as sheet, can be forms such as bar shaped, square, circle.
When the utility model uses, temperature with certain pressure is that 520 ℃ unstripped gas enters annular space between conversion tube 2 and the interpolation pipe 3 from unstripped gas inlet ozzle 8, from top to bottom by catalyst 6 beds, the pyrolytic conversion gas liberated heat that absorbs simultaneously in conversion tube 2 outer high-temperature flue gas (1300 ℃) and the interpolation pipe 3 is finished conversion reaction generation reformed gas, 800 ℃ reformed gas enters interpolation pipe 3 in conversion tube 2 bottoms by the gap of conversion tube 2 bottoms and interpolation pipe 3 bottoms, upwards flow, release heat is given unstripped gas simultaneously, reformed gas after the heat exchange enters reformed gas outlet bend pipe 9 and derives about 570 ℃ of the reformed gas temperature after the derivation from interpolation pipe 3 tops.1300 ℃ high-temperature flue gas enters the annular space that the zone enters formation between conversion tube 2 and the outer tube 4 from the high-temperature flue gas of outer tube 4 bottoms, with the unstripped gas reverse flow, for the unstripped gas conversion reaction provides heat, derive from outer tube 4 top end openings after the heat exchange, the flue-gas temperature after the derivation is about 620 ℃.
Claims (4)
1, a kind of heat-exchanged reformer boiler tube, comprise conversion tube (2), interpolation pipe (3), outer tube (4) and catalyst (6), the middle hypomere of conversion tube (2) is positioned at outer tube (4), interpolation pipe (3) inserts in the conversion tube (2), leave the gap between its lower ending opening bottom and the conversion tube closed bottom end, upper end open is stretched out conversion tube (2), annular space loading catalyst (6) between conversion tube (2) and the interpolation pipe (3), on conversion tube (2), be provided with unstripped gas inlet ozzle (8), on the bottom tube wall of outer tube (4), be evenly equipped with a plurality of perforates, form high-temperature flue gas and enter the zone, it is characterized in that: the water conservancy diversion catch (5) that is used to cover flue gas/Fire Radiation and water conservancy diversion flue gas that is provided with perk at each perforate position of outer tube (4).
2, heat-exchanged reformer boiler tube according to claim 1 is characterized in that: uniform a plurality of perforates are along the setting of tube wall multi-turn on the bottom tube wall of described outer tube (4), and every number of turns amount is 3～20, and each encloses spacing is 10～300mm.
3, heat-exchanged reformer boiler tube according to claim 1 is characterized in that: the angle of its perk of water conservancy diversion catch (5) of described perk is 2 °～30 °.
4, heat-exchanged reformer boiler tube according to claim 1 is characterized in that: the water conservancy diversion catch (5) of described perk can be the perk part at outer tube sidewall opening after-opening position, also can be the sheet metal that welds in addition, and it is shaped as sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520030472 CN2796823Y (en) | 2005-04-18 | 2005-04-18 | Furnace tube of heat exchange type convertor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520030472 CN2796823Y (en) | 2005-04-18 | 2005-04-18 | Furnace tube of heat exchange type convertor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2796823Y true CN2796823Y (en) | 2006-07-19 |
Family
ID=36868061
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520030472 Expired - Fee Related CN2796823Y (en) | 2005-04-18 | 2005-04-18 | Furnace tube of heat exchange type convertor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2796823Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102858448A (en) * | 2011-04-27 | 2013-01-02 | 戴维加工技术有限公司 | Process for the production of anhydrides |
| CN110421236A (en) * | 2019-07-03 | 2019-11-08 | 天津大学 | A kind of military service deterioration Conversion Furnace Tubes in Hydrogen Plants welding repair method |
-
2005
- 2005-04-18 CN CN 200520030472 patent/CN2796823Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102858448A (en) * | 2011-04-27 | 2013-01-02 | 戴维加工技术有限公司 | Process for the production of anhydrides |
| CN102858448B (en) * | 2011-04-27 | 2015-08-19 | 戴维加工技术有限公司 | For the preparation of the method for acid anhydrides |
| CN110421236A (en) * | 2019-07-03 | 2019-11-08 | 天津大学 | A kind of military service deterioration Conversion Furnace Tubes in Hydrogen Plants welding repair method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1091643C (en) | Endothermic reaction apparatus and method | |
| WO2016119224A1 (en) | Isothermal and low temperature shift converter and shift conversion process thereof | |
| CN211310827U (en) | Hydrogen production machine | |
| CN207102559U (en) | Burn formula hydrogen manufacturing conversion furnace in a kind of bottom based on double tube reactor | |
| EP2830994B1 (en) | Steam reformer furnace, and method for the same | |
| CN201526346U (en) | Yellow phosphorous combustion heat recycling device | |
| CN2796823Y (en) | Furnace tube of heat exchange type convertor | |
| CN205402820U (en) | Commercial kitchen waste heat recovery device | |
| CN206720735U (en) | A kind of top burning type hydrogen manufacturing conversion furnace based on double tube reactor | |
| CN201885569U (en) | Energy-saving comprehensive heating furnace for using coke-oven gas to make methanol with side convection sections at sides of two radiation chambers | |
| CN107069065B (en) | Reformer for producing hydrogen by reforming natural gas | |
| JPH0624704A (en) | Reformer of fuel cell | |
| CN101016984A (en) | Vertical steam boiler | |
| CN201852448U (en) | Double-radiation-chamber overhead convection section energy-saving integrated heating furnace for producing methanol from coke-oven gas | |
| CN208074925U (en) | Automatic steam boiler | |
| CN210438410U (en) | Natural gas hydrogen production conversion device | |
| CN211394525U (en) | Novel reforming furnace for producing reducing gas | |
| CN106839823A (en) | A kind of HP boiler water deflection bar type preheater and chemical reaction equipment | |
| CN208365566U (en) | A kind of the heat absorption screen and its waste-heat recovery device of waste-heat recovery device | |
| CN205886830U (en) | Novel fixation reaction bed of no tube sheet methanol oxidation ware | |
| CN202470443U (en) | Heat-absorbing surface structure of chain organic heat carrier furnace | |
| CN101644480B (en) | Tubular double-square heating furnace | |
| CN216630767U (en) | Hydrogen recycling device for hydrogenation reaction | |
| CN203959811U (en) | A kind of hydrogen making converting kiln exit port collecting tube | |
| CN205536539U (en) | Fire living beings heat conduction oil furnace |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: HU NAN JIXIANG PETROCHEMICAL TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: WANG DERUI Effective date: 20111025 Free format text: FORMER OWNER: DONG SHIDA TIAN XIAOLING JI ZHIYUAN |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 471003 LUOYANG, HENAN PROVINCE TO: 414000 YUEYANG, HUNAN PROVINCE |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20111025 Address after: 414000 No. 1, Yueyang Avenue, Yueyang, Hunan Patentee after: Hunan Jilin Petrochemical Polytron Technologies Inc Address before: 063 box 471003, Luoyang, Henan, Qilihe Co-patentee before: Dong Shida Patentee before: Wang Derui Co-patentee before: Tian Xiaoling Co-patentee before: Ji Zhiyuan |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060719 Termination date: 20140418 |