CN201548103U - Raw gas heat-exchange facility for natural gas hydrogen production plant - Google Patents
Raw gas heat-exchange facility for natural gas hydrogen production plant Download PDFInfo
- Publication number
- CN201548103U CN201548103U CN2009203091350U CN200920309135U CN201548103U CN 201548103 U CN201548103 U CN 201548103U CN 2009203091350 U CN2009203091350 U CN 2009203091350U CN 200920309135 U CN200920309135 U CN 200920309135U CN 201548103 U CN201548103 U CN 201548103U
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- inner barrel
- heat exchanger
- coil pipe
- natural gas
- preparation device
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Abstract
The present utility model discloses a raw gas heat-exchange facility for a natural gas hydrogen production plant, relates to a heat exchanger and aims to provide a simple-structure low-cost high-heat-exchanging-performance raw gas heat-exchange facility that is applied in a natural gas conversion hydrogen production plant. The raw gas heat-exchange facility comprises an inner barrel, a coil pipe which is positioned in the inner barrel in a winding mode, one end of the inner barrel has a raw gas inlet, the other end has a raw gas outlet, one end of the coil pipe has a converted gas outlet, the other end has a converted gas outlet, the room of the inner barrel forms a shell pass, the passing path of the coil pipe forms a pipe pass, the raw gas inlet and the converted gas outlet are positioned at the same terminal, and the converted gas inlet and the raw gas outlet are positioned at the same terminal.
Description
Technical field
The utility model relates to a kind of heat exchanger, particularly a kind of feed gas heater that is used for medium and small natural gas hydrogen preparation device.
Background technology
In the conversion of natural gas device for producing hydrogen, (be reformed gas, composition is H to natural gas steam-reforming stove reformed gas exit gas
2, CO
2, CO etc.), temperature up to 800 ℃ ~ 850 ℃, pressure is about 2.0MPa.In industrial production, utilize this high temperature and high pressure gas to heat the required saturated vapor of whole device usually.
For effectively utilizing heat energy, usually will react needed raw material gas (natural gas hydrogen preparation device unstripped gas be natural gas mix by a certain percentage with steam mist) and be preheating to 500 ℃～600 ℃, and enter in the reformer tube again and react at conversion of natural gas stove convection section.
In general industry was produced, the heat exchanger between the gas adopted shell-and-tube heat exchanger more, and as U-type heat exchange of heat pipe, fixed tube-sheet exchanger and movable tube sheets heat exchanger etc., this class heat exchanger adopts heat exchanger tube is linked to each other with tube sheet, again the version that links to each other with housing.
The two ends tube sheet of fixed tube-sheet exchanger adopts Type of Welding and heat exchanger shell to be connected and fixed, and its simple in structure, low cost of manufacture can obtain minimum housing internal diameter, and tube side can be divided into multipass, and shell side also can be divided into round trip, and specification limit is big, and is applied widely; But when the difference that expands at exchanger heat is big, expansion joint can be set, on housing to reduce the thermal stress that produces because of the temperature difference between tube side and the shell side.Under the operating mode of this HTHP of natural gas hydrogen preparation, excessive for the difference of avoiding thermal expansion, expansion joint must be set on heat exchanger.This will increase the cost of entire equipment and weight, occupation of land.
The one end tube sheet and the housing of movable tube sheets heat exchanger are fixed, and the tube sheet of the other end can be in housing free floating, be freely so housing and tube bundle heat expand, thus when the temperature difference of two media greatly the time, restrain and housing between not production temperature difference pressure.Raise the nose above water to breathe to hold to be designed to new construction, make tube bank can easily insert or extract out housing, be maintenance like this, cleaning provides convenience, but this heat exchanger structure complexity, and the floating end tegillum time can't know leak case in operation, therefore will pay special attention to its sealing when mounted.
U-type heat exchange of heat pipe generally is used for the HTHP situation.Heat exchanger tube is curved the U type, and the heat exchanger tube two ends are fixed on the same tube sheet, because housing separates with heat exchanger tube, can not consider thermal expansion.Because of U type pipe heat exchanger only has a tube sheet, and there is not floating head, so cost simple in structure is lower than fixed tube-sheet exchanger and movable tube sheets heat exchanger; But the medium in the exchange heat pipe is had relatively high expectations, medium must be cleaning and less scaling material, because the version of heat exchanger tube, the replacing of heat exchanger tube is except that the one deck of the outside, and the internal heat exchange tubes major part can not be changed, in addition because there is the space in the tube bank core, so easy short circuit of fluid, influence heat transfer efficiency, and the heat exchanger tube of arranging on the tube sheet is less, structure is not compact.The bent tube section curvature difference of U type pipe, heat exchanger tube length is inconsistent, thereby material distributes evenly not as fixed tube-sheet exchanger, and heat exchanger tube will cause the loss of heat transfer area because of after seepage blocks.
Under the operating mode of this HTHP of natural gas hydrogen preparation, if adopt above-mentioned this shell-and-tube heat exchanger, be bound to tube sheet, heat exchanger end bobbin carriage, heat exchanger tube all will adopt precious metal, as HP-40 or 25Cr-20Ni, Incoloy800H alloy, this class material cost height, the cost that will be entire equipment increases substantially, and the entire equipment volume is relatively large, and weight is big, will propose high requirement to the layout of device support and whole device.
The utility model content
The purpose of this utility model provides a kind of unstripped gas heat exchanger that is applied to the conversion of natural gas device for producing hydrogen, has advantage simple in structure, that cost is low, heat exchange property is high.
The purpose of this utility model realizes by following technical proposals:
A kind of natural gas hydrogen preparation device unstripped gas heat exchanger comprises inner barrel, coil pipe, and coil pipe spirals and is arranged in the inner barrel, and an end of inner barrel offers raw material gas inlet, and the other end offers the unstripped gas outlet; One end of coil pipe offers the reformed gas outlet, and the other end offers the reformed gas import; The space of inner barrel forms shell side, and the circulation path of coil pipe forms tube side.
Described raw material gas inlet and reformed gas outlet are positioned at same side, and reformed gas import and unstripped gas outlet are positioned at same side.
Be arranged on the taper inner barrel in the described inner barrel, coil pipe spirals and is fixed on the outer wall of taper inner barrel.
The reformed gas import of described coil pipe is communicated with the main body of coil pipe by the exchanging air manifold trunk.
Described inner barrel is with outer cylinder body outward, is filled with thermal insulation layer between inner barrel and the outer cylinder body.
Described thermal insulation layer is the fine formation of general aluminium pottery.
Described coil pipe screw thread is coiled on the outer wall of taper inner barrel.
The outer wall of described outer cylinder body is provided with the fixedly journal stirrup of usefulness.
The utility model adopts said structure, transforms and makes tube side leave with rage, and raw material is made shell side leave with rage, and coil pipe is spiraled to be fixed on the taper inner barrel, can avoid coil pipe to rock in the equipment course of work; Adopt the structure of adverse current, promptly the import and export of reformed gas and unstripped gas is opposite each other, can optimize two kinds of heat transfer efficiencys between the fluid; At inner core extracorporeal set outer cylinder body, and the stuffed heat insulated layer of between, can make the hull-skin temperature of entire equipment reach about 60 ℃ of national requirements; Adopt the heat exchanger of this structure, can adopt alloy to make as coil pipe and import and export pipe thereof only with the tube side parts, other parts adopt the common stainless steel material to get final product, thereby the cost of entire equipment is reduced.
As seen, adopt the utility model of said structure, compared with prior art, have the advantage that structure is simpler, cost is cheaper, heat exchange property is high.
Description of drawings
The utility model will illustrate by example and with reference to the mode of accompanying drawing, wherein:
Fig. 1 is a structural representation of the present utility model;
Number in the figure: the 1st, inner barrel, the 2nd, reformed gas outlet, the 3rd, shell side, the 4th, liner cylindrical shell, the 5th, thermal insulation layer, the 6th, journal stirrup, the 7th, tube side, the 8th, exchanging air manifold trunk, the 9th, outer cylinder body, the 10th, reformed gas import, the 11st, raw material gas inlet, the 12nd, taper inner barrel, the 13rd, raw material gas inlet.
The specific embodiment
As shown in Figure 1, the feed gas heater that the natural gas hydrogen preparation device is used comprises inner barrel 1, its upper and lower end offers raw material gas inlet 11 and unstripped gas outlet 13 respectively, be provided with taper inner barrel 12 in the inner barrel 1, on the outer wall of taper inner barrel 12 fixedly helical disk be wound with coil pipe, because of each layer of coil pipe spiral is fixed on the outer wall of taper inner barrel 12, makes position relative fixed between each layer of coil pipe, thereby avoid rocking or rocking of in equipment course of work coil pipe.
As shown in Figure 1, the lower end of coil pipe is communicated with reformed gas import 10 by exchanging air manifold trunk 8, stretch out outside the inner barrel 1 by reformed gas outlet 2 upper end of coil pipe, thereby make coil pipe constitute tube side 7, and the space of inner barrel 1 (the particularly space between its inwall and the coil pipe) forms shell side 3.
As can be seen from Figure 1, raw material gas inlet 11 and reformed gas outlet 2 is positioned at the upper end of heat exchanger; Unstripped gas outlet 13 and reformed gas import 10 are positioned at the lower end of heat exchanger.The structure of this adverse current, what make two kinds of fluids mobilely is in a kind of move toward one another state, is more conducive to the raising of heat exchange efficiency.
For the hull-skin temperature that makes inner barrel 1 is reduced to the requirement that meets national regulation, outside inner barrel 1, be set with outer cylinder body 9, and between inner barrel 1 and outer cylinder body 9 stuffed heat insulated layer 5.Among the embodiment, thermal insulation layer 5 can be the fine formation of the general aluminium pottery of light insulating material, thereby outer surface (being the outer wall of the outer cylinder body) temperature of equipment is reduced to about 60 ℃ that meet the national regulation requirement.
For the ease of installing, also be fixed with journal stirrup 6 on the outer wall of outer cylinder body 9.
Owing to adopt said structure, grabbing reformed gas outlet 2, exchanging air manifold trunk 8, reformed gas import 10 except that the coil component that constitutes tube side 7 adopts the Incoloy800H alloy material systems (because of this alloy has good mechanical performance, it is the Ni-Fe-evanohm of resistance to high temperature oxidation and high temperature resistance carburizing, the nickel content of this alloy is up to 32%, thereby the muriatic stress corrosion cracking of ability, and to have good be the homogeneous corrosion performance, creep resistant and stress cracking), and the equipment remainder all can adopt the common stainless steel material.
The heat exchanger advantage of said structure is: simple in structure, cost is low, operational administrative is simple, and also wherein the heat exchange coil of spiral can bear HTHP.
An Application Example is a 50Nm
3In the natural gas hydrogen preparation device of/H, system's operating pressure is 2.0Mpa, reburner adopts the cylindrical shape reburner, reburner outlet reformed gas temperature is up to more than 800 ℃, unstripped gas through preheating in advance after temperature be 240 ℃, required for effectively utilizing heat energy and satisfying the reaction of natural gas steam reforming hydrogen manufacturing, unstripped gas need be heated to about 600 ℃.
In this device, adopt the unstripped gas heat exchanger of 2 spiral coils, be used for the heat exchange of pyrolytic conversion gas, the unstripped gas temperature is heated to 590 ℃, and the reformed gas temperature drops to 480 ℃, can utilize heat energy expeditiously, also can utilize this pyrolytic conversion gas institute heat content to continue to produce the saturated vapor of the required 2.0Mpa of natural gas hydrogen preparation.
This unstripped gas converter is compared with the general shell-and-tube heat exchanger that uses in the industrial production, it is nearly 1/3 to save cost, and entire equipment weight has reduced 18%, along with weight of equipment lightens, volume lightens, floor space is also along with minimizing, and makes the heat energy utilization rate rise 15%.
Disclosed all features in this specification, or the step in disclosed all methods or the process except mutually exclusive feature and/or step, all can make up by any way.
Disclosed arbitrary feature in this specification (comprising any accessory claim, summary and accompanying drawing) is unless special narration all can be replaced by other equivalences or the alternative features with similar purpose.That is, unless special narration, each feature is an example in a series of equivalences or the similar characteristics.
The above only is preferred embodiment of the present utility model; not in order to restriction the utility model; all any modifications of within spirit of the present utility model and principle, being done, be equal to and replace and improvement etc., all should be included within the protection domain of the present utility model.
Claims (8)
1. a natural gas hydrogen preparation device unstripped gas heat exchanger is characterized in that, comprises inner barrel, coil pipe, and coil pipe spirals and is arranged in the inner barrel, and an end of inner barrel offers raw material gas inlet, and the other end offers the unstripped gas outlet; One end of coil pipe offers the reformed gas outlet, and the other end offers the reformed gas import; The space of inner barrel forms shell side, and the circulation path of coil pipe forms tube side.
2. a kind of according to claim 1 natural gas hydrogen preparation device unstripped gas heat exchanger is characterized in that, described raw material gas inlet and reformed gas outlet are positioned at same side, and reformed gas import and unstripped gas outlet are positioned at same side.
3. a kind of according to claim 1 natural gas hydrogen preparation device unstripped gas heat exchanger is characterized in that, is arranged on the taper inner barrel in the described inner barrel, and coil pipe spirals and is fixed on the outer wall of taper inner barrel.
4. a kind of according to claim 1 natural gas hydrogen preparation device unstripped gas heat exchanger is characterized in that, the reformed gas import of described coil pipe is communicated with the main body of coil pipe by the exchanging air manifold trunk.
5. a kind of according to claim 1 natural gas hydrogen preparation device unstripped gas heat exchanger is characterized in that described inner barrel is with outer cylinder body outward, is filled with thermal insulation layer between inner barrel and the outer cylinder body.
6. as a kind of natural gas hydrogen preparation device unstripped gas heat exchanger as described in the claim 5, it is characterized in that described thermal insulation layer is that general aluminium is made pottery and finely constituted.
7. as a kind of natural gas hydrogen preparation device unstripped gas heat exchanger as described in the claim 3, it is characterized in that described coil pipe screw thread is coiled on the outer wall of taper inner barrel.
8. as a kind of natural gas hydrogen preparation device unstripped gas heat exchanger as described in the claim 6, it is characterized in that the outer wall of described outer cylinder body is provided with the fixedly journal stirrup of usefulness.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009203091350U CN201548103U (en) | 2009-08-28 | 2009-08-28 | Raw gas heat-exchange facility for natural gas hydrogen production plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009203091350U CN201548103U (en) | 2009-08-28 | 2009-08-28 | Raw gas heat-exchange facility for natural gas hydrogen production plant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201548103U true CN201548103U (en) | 2010-08-11 |
Family
ID=42603276
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009203091350U Expired - Fee Related CN201548103U (en) | 2009-08-28 | 2009-08-28 | Raw gas heat-exchange facility for natural gas hydrogen production plant |
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|---|---|
| CN (1) | CN201548103U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103925591A (en) * | 2013-01-15 | 2014-07-16 | 中国石化工程建设有限公司 | Winding pipe steam superheater for methanation unit |
| CN108931150A (en) * | 2018-04-06 | 2018-12-04 | 四川创达新能科技有限公司 | Integrated heat-exchange equipment in natural gas hydrogen preparation system |
| CN110407172A (en) * | 2019-08-20 | 2019-11-05 | 四川亚联高科技股份有限公司 | A kind of middle-size and small-size natural gas hydrogen production plant |
-
2009
- 2009-08-28 CN CN2009203091350U patent/CN201548103U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103925591A (en) * | 2013-01-15 | 2014-07-16 | 中国石化工程建设有限公司 | Winding pipe steam superheater for methanation unit |
| CN108931150A (en) * | 2018-04-06 | 2018-12-04 | 四川创达新能科技有限公司 | Integrated heat-exchange equipment in natural gas hydrogen preparation system |
| CN108931150B (en) * | 2018-04-06 | 2023-10-24 | 四川创达新能科技有限公司 | Integrated heat exchange equipment in natural gas hydrogen production system |
| CN110407172A (en) * | 2019-08-20 | 2019-11-05 | 四川亚联高科技股份有限公司 | A kind of middle-size and small-size natural gas hydrogen production plant |
| WO2021031894A1 (en) * | 2019-08-20 | 2021-02-25 | 四川亚联高科技股份有限公司 | Integrated small to medium-sized natural gas steam reforming reactor, and reforming reaction process |
| CN110407172B (en) * | 2019-08-20 | 2024-04-26 | 四川亚联氢能科技股份有限公司 | Small and medium-sized natural gas hydrogen production device |
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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 |
Granted publication date: 20100811 Termination date: 20160828 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |