CN114789990A - Methanol hydrogen production converter and methanol hydrogen production device - Google Patents
Methanol hydrogen production converter and methanol hydrogen production device Download PDFInfo
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- CN114789990A CN114789990A CN202111441092.3A CN202111441092A CN114789990A CN 114789990 A CN114789990 A CN 114789990A CN 202111441092 A CN202111441092 A CN 202111441092A CN 114789990 A CN114789990 A CN 114789990A
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- C01B3/00—Hydrogen; Gaseous mixtures containing hydrogen; Separation of hydrogen from mixtures containing it; Purification of hydrogen
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Abstract
The invention relates to a methanol hydrogen production converter and a methanol hydrogen production device, wherein the methanol hydrogen production converter comprises: the outer cavity mechanism is vertically arranged and used for containing the raw material liquid; the two ends of the inner cavity mechanism are sealed and are arranged in the outer cavity mechanism in an inserting way; the inner cavity mechanism is internally provided with an accommodating cavity for accommodating a heat supply medium; the conversion mechanism is arranged in the inner cavity mechanism; the conversion mechanism comprises a conversion pipe which is vertically arranged, is wrapped by the heat supply medium and is used for carrying out catalytic reaction on the vaporized raw material liquid and generating conversion gas containing hydrogen; the circular heat exchange tube bundle mechanism is arranged in the outer cavity mechanism and sleeved on the periphery of the inner cavity mechanism; the circular heat exchange tube bundle mechanism comprises a heat exchange tube, an upper circular tube and a lower circular tube and is used for circulating heat conduction oil. Through the arrangement, the problems of large equipment floor area, low heat utilization rate of heat conduction oil and high engineering cost caused by the non-integrated design of the converter in the conventional methanol hydrogen production device can be solved.
Description
Technical Field
The invention relates to the technical field of methanol hydrogen production chemical equipment, in particular to a methanol hydrogen production converter and a methanol hydrogen production device.
Background
The vaporization superheater and the converter are core equipment in the methanol hydrogen production device, raw material liquid enters the vaporization superheater to exchange heat with heat conduction oil, and enters the converter to perform catalytic reaction after vaporization to produce converted gas containing hydrogen.
The two sets of devices occupy a large area, the heat conducting oil system needs to pass through the vaporization superheater and then enters the converter to provide heat required by reaction, the pipeline of the heat conducting oil system is thick, the arrangement is inconvenient during pipe distribution, and external circulation can cause certain heat loss.
With the development of skid-mounted methanol hydrogen production devices, how to reduce the volume of a vaporization superheater and a converter and skid-mount the vaporization superheater and the converter into blocks becomes an important issue.
In the prior art, chinese patent document CN214407084U discloses a heat exchanger for a methanol hydrogen production heat exchange system, which relates to the field of heat exchangers and is used for heat exchange of a raw material liquid in a methanol hydrogen production process; the heat exchanger and the vaporization superheater are fixedly connected through a second tube plate, and a tube pass of the heat exchanger is communicated with a shell pass of the vaporization superheater through the second tube plate; this patent relates only to the heat exchanger, vaporizing superheater combined design, but does not relate to the integration of the converter.
In order to ensure that the methanol hydrogen production device can be efficiently integrated and can fully ensure the heat exchange effect, the heat of the heat conduction oil needs to be fully utilized, and the length of a pipeline of the external circulation of the device is reduced as much as possible.
Disclosure of Invention
In order to solve the technical problems, the invention aims to provide a methanol hydrogen production converter and a methanol hydrogen production device, wherein the methanol hydrogen production converter is used for solving the problem of low heat utilization rate of heat transfer oil caused by the fact that the converter in the existing methanol hydrogen production device is not integrated.
In order to achieve one of the above objects, an embodiment of the present invention provides a methanol hydrogen production converter, including:
the outer cavity mechanism is vertically arranged and is used for accommodating raw material liquid;
the two ends of the inner cavity mechanism are sealed and are arranged in the outer cavity mechanism in an inserting way; the inner cavity mechanism is internally provided with an accommodating cavity for accommodating a heat supply medium;
the conversion mechanism is arranged in the inner cavity mechanism; the conversion mechanism comprises a conversion pipe which is vertically arranged, is wrapped by the heat supply medium and is used for carrying out catalytic reaction on the vaporized raw material liquid to generate conversion gas containing hydrogen;
the circular heat exchange tube bundle mechanism is arranged in the outer cavity mechanism and sleeved on the periphery of the inner cavity mechanism; the circular heat exchange tube bundle mechanism comprises a heat exchange tube, an upper circular tube and a lower circular tube and is used for circulating heat conduction oil.
As a further improvement of an embodiment of the invention, the annular heat exchange tube bundle mechanism further comprises a heat conduction oil lower inlet and a heat conduction oil outlet; the lower heat conduction oil inlet is communicated with the lower circular ring pipe, and the heat conduction oil outlet is communicated with the upper circular ring pipe.
As a further improvement of an embodiment of the present invention, the heat supply medium is heat transfer oil.
As a further improvement of an embodiment of the invention, the inner cavity mechanism further comprises a heat conduction oil upper inlet and a heat conduction oil lower outlet; the upper heat conduction oil inlet is communicated with the top of the containing cavity, and the lower heat conduction oil outlet is communicated with the bottom of the containing cavity.
As a further improvement of an embodiment of the present invention, the outer chamber mechanism comprises a raw material liquid inlet, a vaporized superheated gas outlet; the raw material liquid inlet is arranged at the bottom of the outer cavity mechanism, and the vaporized superheated gas outlet is arranged at the top of the outer cavity mechanism; the inner cavity mechanism also comprises a vaporized superheated gas inlet which is arranged at the top of the conversion mechanism.
As a further improvement of an embodiment of the present invention, both ends of the conversion tube protrude outside the outer cavity mechanism; the conversion mechanism further comprises an upper end enclosure and a lower end enclosure which are respectively arranged at two ends of the conversion pipe.
As a further improvement of an embodiment of the present invention, the upper end enclosure and the lower end enclosure are respectively connected to two ends of the conversion mechanism through flanges.
As a further improvement of an embodiment of the present invention, the conversion mechanism further comprises an upper tube plate and a lower tube plate; and two ends of the conversion tube are respectively fixedly connected with the upper tube plate and the lower tube plate.
As a further improvement of an embodiment of the present invention, the methanol-to-hydrogen converter further includes a supporting leg disposed at the bottom of the methanol-to-hydrogen converter.
An embodiment of the invention further provides a methanol hydrogen production device, which comprises the methanol hydrogen production converter as described in any one of the above.
Compared with the prior art, the invention has the beneficial effects that:
(1) after the vaporization superheater and the converter are integrally designed, the occupied area is reduced, the device is more compact, and skid-mounted and transported conveniently.
(2) The heat of the heat-conducting oil is fully utilized, the heat loss is reduced, the energy consumption of the device is reduced, and the load of a heat-conducting oil heat supply system is reduced;
(3) the automatic control measures of pipelines and instruments are reduced, the automatic control of the device is facilitated, and the investment cost is reduced;
(4) the heat of the heat conducting oil is effectively utilized; because the temperature difference between the inner cavity and the outer cavity is small, the thermal stress of the equipment is reduced, the service life of the equipment is prolonged, and the equipment is safer and more stable;
(5) the reduction time and the temperature rise time of the catalyst during the start-up are reduced, and the debugging time can be shortened.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the embodiments or the description of the prior art will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
FIG. 1 is a schematic structural diagram of an annular bundle heat exchanger according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a methanol to hydrogen converter according to an embodiment of the present invention;
FIG. 3 is a schematic process flow diagram of a methanol to hydrogen converter in one embodiment of the invention.
Wherein reference numerals are referred to in the figures as follows:
the device comprises an outer cavity mechanism 1, a circular heat exchange tube bundle mechanism 2, an upper end enclosure 3, an upper tube plate 4, a conversion tube 5, an inner cavity mechanism 6, a lower end enclosure 7, a lower tube plate 8, a raw material liquid inlet N1, a vaporized superheated gas outlet N2, a vaporized superheated gas inlet N3 and a converted gas outlet N4; a heat conduction oil lower inlet N5, a heat conduction oil outlet N6, a heat conduction oil upper inlet N7 and a heat conduction oil lower outlet N8.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention and the accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments of the present invention, belong to the protection scope of the present invention.
The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention and are not to be construed as limiting the present invention.
As shown in fig. 1 to 3, an embodiment of the present invention provides a methanol-to-hydrogen converter, including:
the outer cavity mechanism 1 is vertically arranged and used for containing raw material liquid;
the inner cavity mechanism 6 is sealed at two ends and is arranged in the outer cavity mechanism 1 in an inserting way; the inner cavity mechanism 6 is internally provided with an accommodating cavity for accommodating a heat supply medium;
the conversion mechanism is arranged in the inner cavity mechanism 6; the conversion mechanism comprises a conversion pipe 5 which is vertically arranged, is wrapped by a heat supply medium and is used for carrying out catalytic reaction on the vaporized raw material liquid to generate conversion gas containing hydrogen;
the circular heat exchange tube bundle mechanism 2 is arranged in the outer cavity mechanism 1 and sleeved on the periphery of the inner cavity mechanism 6; the circular heat exchange tube bundle mechanism 2 comprises a heat exchange tube, an upper circular tube and a lower circular tube and is used for circulating heat conduction oil.
The methanol hydrogen production converter integrates the vaporization superheater and the converter to form a heat exchanger with a plurality of channels and double cavities and a conversion tube 5, so that the volumes of the two devices are reduced on the premise of ensuring the heat exchange effect;
under the same hydrogen production scale, the heat exchange area can be effectively reduced, the heat exchange efficiency can be improved, the conversion efficiency can be improved, the heat transfer oil circulation quantity and the pressure drop can be reduced, and the device is more compact and convenient to skid-mount and transport.
In practical use, a circular ring type heat exchange tube bundle is arranged in the outer cavity; the heat pipe bundle is not limited to a smooth pipe, and also comprises a spiral winding pipe, a finned pipe and the like; the inner cavity is provided with a methanol conversion system, and the outer cavity is provided with a vaporization overheating system.
In addition, the annular heat exchange tube bundle in the outer cavity adopts an integral heat treatment process to eliminate stress, and the conversion pipe can adopt a DN45 pipeline.
In practice, the operating pressure in the external chamber of the integrated converter can reach 2.5MPag and the operating pressure in the conversion tube can reach 25 MPag.
Further, the circular heat exchange tube bundle mechanism 2 further comprises a heat conduction oil lower inlet N5 and a heat conduction oil outlet N6; the heat conducting oil lower inlet N5 is communicated with the lower circular ring pipe, and the heat conducting oil outlet N6 is communicated with the upper circular ring pipe.
In practical use, the heat exchange tubes are connected through the upper and lower circular rings, and heat conduction oil flows to the upper circular ring through the lower circular ring.
Further, the heat supply medium is heat conduction oil.
Further, the inner cavity mechanism 6 also comprises a heat conduction oil upper inlet N7 and a heat conduction oil lower outlet N8; an upper heat conduction oil inlet N7 is communicated with the top of the accommodating cavity, and a lower heat conduction oil outlet N8 is communicated with the bottom of the accommodating cavity.
In practical use, the inner cavity is provided with a conversion pipe 5; heat is supplied between the conversion pipes 5 by heat conducting oil, and the heat supplying medium also comprises steam, hot water, other crude oil and the like.
Therefore, the heat conduction oil flows from top to bottom in the accommodating cavity.
Further, the outer cavity mechanism 1 comprises a raw material liquid inlet N1 and a vaporized superheated gas outlet N2; the raw material liquid inlet N1 is arranged at the bottom of the outer cavity mechanism 1, and the vaporized hot gas outlet N2 is arranged at the top of the outer cavity mechanism 1; the inner cavity mechanism 6 also comprises a vaporized hot gas inlet N3 which is arranged at the top of the conversion mechanism.
Thereby, the raw material liquid is vaporized in the outer chamber means 1, and the vaporized superheated gas is discharged from the top of the outer chamber means 1 and introduced from the top of the conversion means, so that the conversion reaction is carried out.
Furthermore, two ends of the conversion tube 5 protrude out of the outer cavity mechanism 1; the conversion mechanism also comprises an upper end enclosure 3 and a lower end enclosure 7 which are respectively arranged at two ends of the conversion pipe 5.
Furthermore, the upper end enclosure 3 and the lower end enclosure 7 are respectively connected to two ends of the conversion mechanism through flanges.
In practical use, the inner cavity extends out of the outer cavity, and the upper seal head 7 and the lower seal head 7 which extend out of the outer cavity can be connected by flanges.
Further, the conversion mechanism also comprises an upper tube plate 4 and a lower tube plate 8; the two ends of the conversion pipe 5 are respectively fixedly connected with the upper pipe plate 4 and the lower pipe plate 8.
In actual use, the two ends of the conversion tube 5 are fixed through tube plates.
In addition, heat treatment can be used to relieve stress at the tubesheet and reformer tubes 5 in the interior chamber.
Furthermore, the methanol hydrogen production converter also comprises supporting legs which are arranged at the bottom of the methanol hydrogen production converter.
In practical use, the outer side of the converter can be installed in the form of a support lug or a support leg; the pipe orifice can adopt flange connection.
An embodiment of the present invention further provides a methanol hydrogen production apparatus, including the methanol hydrogen production converter as described above.
In the specific example 1, the following procedure was followed,
when the integrated converter is adopted, under the same condition, the diameter of the circular heat exchange tube DN50 is 32, the diameter is 2m, the height is 3m, and the heat exchange area is only 19.4 square meters; total 230 tubes, diameter
The length is 4.7 meters, the heat exchange area is 152 square meters, the circulation volume of the heat transfer oil is 40 cubic meters per hour,a pressure drop of 50 Kpag.
In the conventional art, 500Nm 3 The vaporization superheater of the methanol hydrogen production device has the area of 40 square meters, the heat exchange area of the conversion pipe is 152 square meters, the circulation quantity of heat transfer oil is 45 cubic meters per hour, and the pressure drop is 2 barg.
In the specific embodiment 2, the first step is carried out,
when an integrated converter is adopted, the whole diameter is 2.5 meters, and the floor area is 0.785x2.5mx2.5m ═ 4.9 square meters.
In the conventional technique, 500Nm 3 The floor area of a vaporization superheater and a converter of the methanol hydrogen production device needs 3.5mx2 m-7 square meters.
In the specific embodiment 3, it is shown that,
when the device with the same scale of the integrated converter is adopted, qualified hydrogen can be produced in only 8 hours;
in the conventional technique, 500Nm 3 In the methanol hydrogen production device, the temperature is raised from the heat conduction oil, the catalyst is reduced, and the qualified hydrogen is produced in 12 hours.
It should be understood that although the present description refers to embodiments, not every embodiment contains only a single technical solution, and such description is for clarity only, and those skilled in the art should make the description as a whole, and the technical solutions in the embodiments can also be combined appropriately to form other embodiments understood by those skilled in the art.
The above-listed detailed description is merely a detailed description of possible embodiments of the present invention and is not intended to limit the scope of the invention, which is intended to include within the scope of the invention all equivalent embodiments or modifications that do not depart from the technical spirit of the present invention.
Claims (10)
1. A methanol-to-hydrogen converter, comprising:
the outer cavity mechanism is vertically arranged and used for containing the raw material liquid;
the two ends of the inner cavity mechanism are sealed and are arranged in the outer cavity mechanism in an inserting way; the inner cavity mechanism is internally provided with an accommodating cavity for accommodating a heat supply medium;
the conversion mechanism is arranged in the inner cavity mechanism; the conversion mechanism comprises a conversion pipe which is vertically arranged, is wrapped by the heat supply medium and is used for carrying out catalytic reaction on the vaporized raw material liquid and generating conversion gas containing hydrogen;
the circular heat exchange tube bundle mechanism is arranged in the outer cavity mechanism and sleeved on the periphery of the inner cavity mechanism; the circular heat exchange tube bundle mechanism comprises a heat exchange tube, an upper circular tube and a lower circular tube and is used for circulating heat conduction oil.
2. The methanol hydrogen production converter according to claim 1, wherein the circular heat exchange tube bundle mechanism further comprises a heat transfer oil lower inlet and a heat transfer oil outlet; the lower heat conduction oil inlet is communicated with the lower circular ring pipe, and the heat conduction oil outlet is communicated with the upper circular ring pipe.
3. The methanol-to-hydrogen converter according to claim 2, wherein the heat supply medium is heat transfer oil.
4. The methanol-to-hydrogen converter according to claim 3, wherein the inner cavity mechanism further comprises a heat transfer oil upper inlet and a heat transfer oil lower outlet; the upper heat conduction oil inlet is communicated with the top of the accommodating cavity, and the lower heat conduction oil outlet is communicated with the bottom of the accommodating cavity.
5. The methanol to hydrogen converter of claim 4, wherein the outer chamber mechanism comprises a raw material liquid inlet, a vaporized superheated gas outlet; the raw material liquid inlet is arranged at the bottom of the outer cavity mechanism, and the vaporized superheated gas outlet is arranged at the top of the outer cavity mechanism; the inner cavity mechanism also comprises a vaporized superheated gas inlet which is arranged at the top of the conversion mechanism.
6. The methanol-to-hydrogen converter as claimed in claim 5, wherein both ends of the conversion tube protrude outside the outer cavity mechanism; the conversion mechanism further comprises an upper end enclosure and a lower end enclosure which are respectively arranged at two ends of the conversion pipe.
7. The methanol-to-hydrogen converter as claimed in claim 6, wherein the upper head and the lower head are respectively connected to two ends of the conversion mechanism through flanges.
8. The methanol to hydrogen converter of claim 7, wherein the conversion mechanism further comprises an upper tube plate, a lower tube plate; and two ends of the conversion tube are respectively fixedly connected with the upper tube plate and the lower tube plate.
9. The methanol-to-hydrogen converter according to claim 8, further comprising a support leg disposed at the bottom of the methanol-to-hydrogen converter.
10. A device for producing hydrogen from methanol, comprising the hydrogen production converter from methanol according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111441092.3A CN114789990A (en) | 2021-11-30 | 2021-11-30 | Methanol hydrogen production converter and methanol hydrogen production device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111441092.3A CN114789990A (en) | 2021-11-30 | 2021-11-30 | Methanol hydrogen production converter and methanol hydrogen production device |
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| Publication Number | Publication Date |
|---|---|
| CN114789990A true CN114789990A (en) | 2022-07-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111441092.3A Pending CN114789990A (en) | 2021-11-30 | 2021-11-30 | Methanol hydrogen production converter and methanol hydrogen production device |
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| CN (1) | CN114789990A (en) |
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2021
- 2021-11-30 CN CN202111441092.3A patent/CN114789990A/en active Pending
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