CN220169424U - Steam generator for preparing synthetic gas by methane reforming - Google Patents
Steam generator for preparing synthetic gas by methane reforming Download PDFInfo
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- CN220169424U CN220169424U CN202321312425.7U CN202321312425U CN220169424U CN 220169424 U CN220169424 U CN 220169424U CN 202321312425 U CN202321312425 U CN 202321312425U CN 220169424 U CN220169424 U CN 220169424U
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- gas
- heating tube
- tube bundle
- water
- steam generator
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- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 88
- 238000002407 reforming Methods 0.000 title claims abstract description 24
- 238000010438 heat treatment Methods 0.000 claims abstract description 109
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 78
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 14
- 238000003786 synthesis reaction Methods 0.000 claims abstract description 14
- 238000002955 isolation Methods 0.000 claims abstract description 8
- 238000000926 separation method Methods 0.000 claims abstract 2
- 230000000087 stabilizing effect Effects 0.000 claims description 13
- 239000000203 mixture Substances 0.000 claims description 5
- 238000005192 partition Methods 0.000 claims description 5
- 239000003381 stabilizer Substances 0.000 claims description 3
- 238000004804 winding Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 6
- 230000008569 process Effects 0.000 abstract description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 2
- 229910052799 carbon Inorganic materials 0.000 abstract description 2
- 230000008021 deposition Effects 0.000 abstract description 2
- 238000013316 zoning Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 96
- 239000002737 fuel gas Substances 0.000 description 12
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 11
- 229910052739 hydrogen Inorganic materials 0.000 description 11
- 239000001257 hydrogen Substances 0.000 description 11
- 238000004519 manufacturing process Methods 0.000 description 10
- 239000007788 liquid Substances 0.000 description 6
- 239000003345 natural gas Substances 0.000 description 6
- 238000000629 steam reforming Methods 0.000 description 5
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 4
- 229910002091 carbon monoxide Inorganic materials 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000001704 evaporation Methods 0.000 description 3
- 230000008020 evaporation Effects 0.000 description 3
- 239000003054 catalyst Substances 0.000 description 2
- 238000006555 catalytic reaction Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000007809 chemical reaction catalyst Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
Abstract
The utility model discloses a steam generator for preparing synthesis gas by reforming methane, which comprises a shell, wherein a gas heating tube bundle and a water heating tube bundle are arranged in the shell, and the gas heating tube bundles are arranged on the periphery of the water heating tube bundle and are separated by a separation plate; one end of the gas heating tube bundle is communicated with the gas inlet tube, the other end of the gas heating tube bundle is communicated with the mixing cavity, one end of the water heating tube bundle is communicated with the water inlet tube, and the other end of the water heating tube bundle is communicated with the mixing cavity; the shell is also provided with a high-temperature tail gas inlet pipe, the high-temperature tail gas enters the cavity where the heating tube bundle is located firstly, and then enters the cavity where the gas heating tube bundle is located through the through holes in the isolation plate; the steam generator divides the heating process of water/steam and methane-rich gas into zoning, sequential heating-mixing processes, the high-temperature tail gas firstly heats water, and then heats the methane-rich gas after the temperature of the tail gas is reduced, so that the pressure drop loss can be effectively controlled and the methane heating carbon deposition phenomenon can be prevented on the premise of ensuring the heat exchange capability.
Description
Technical Field
The utility model belongs to the technical field of methane reforming hydrogen production, and particularly relates to a steam generator for preparing synthesis gas by methane reforming.
Background
The statements herein merely provide background information related to the present disclosure and may not necessarily constitute prior art.
Because of the continuous increase of natural gas resources and the technical advantages of natural gas hydrogen production, natural gas hydrogen production has become one of the main hydrogen production methods nowadays, and the natural gas reforming hydrogen production process mainly comprises the following steps: 1. steam reforming reaction: in the reaction, raw material methane and steam react under the condition of a steam reforming reaction catalyst to prepare primary reformed gas, wherein the primary reformed gas mainly comprises hydrogen and carbon monoxide, a large amount of heat is required to be absorbed in the step, and the temperature is usually required to be maintained at 800-1000 ℃. 2. Water vapor transfer catalytic reaction: in the reaction, carbon monoxide in the primary reformed gas reacts with water under the condition of a water vapor transfer catalyst, so that the carbon monoxide in the primary reformed gas is removed to prepare secondary reformed gas. The reaction requires controlling the temperature between 300 ℃ and 350 ℃. 3. Selective methanation: in the reaction, under the catalysis of the selective methanation catalyst, carbon monoxide in the secondary reformed gas is further reacted and removed, so that purified hydrogen is prepared.
For the steam reforming reaction process in the natural gas reforming hydrogen production process, a steam generator is generally required to heat water into steam, and meanwhile methane is required to be heated, most of the existing steam generators are independent components and are connected with other components through pipelines to form a hydrogen production or synthesis gas production system together, for example, chinese patent No. 114408867A discloses a hydrogen production system based on methane dry reforming, a steam shift reactor, a first preheater, a second preheater and a third preheater are arranged, the steam reforming process is realized through the plurality of arranged heat exchangers, the system is large in size and inconvenient to assemble, the heat exchangers flow from an inlet to an outlet in series at one time, and adjustment measures are not needed in the heat exchangers, so that when working conditions change, the flow and the temperature cannot be interfered and adjusted, and the maintenance is inconvenient.
Disclosure of Invention
The utility model aims to provide a steam generator for preparing synthetic gas by reforming methane, which divides the heating process of water and methane-rich gas into subareas, heating and mixing processes sequentially, and can ensure that the evaporation heating process of liquid water and the heating process of methane-rich gas are independently carried out in a set of device.
In order to achieve the above object, the present utility model is realized by the following technical scheme:
in a first aspect, an embodiment of the present utility model provides a steam generator for producing synthesis gas by reforming methane, including a housing, in which a gas heating tube bundle and a water heating tube bundle are disposed, the gas heating tube bundle being disposed at an outer periphery of the water heating tube bundle and being partitioned by a partition plate; one end of the gas heating tube bundle is communicated with the gas inlet tube, the other end of the gas heating tube bundle is communicated with the mixing cavity, one end of the water heating tube bundle is communicated with the water inlet tube, and the other end of the water heating tube bundle is communicated with the mixing cavity; the shell is also provided with a high-temperature tail gas inlet pipe, the high-temperature tail gas enters the cavity where the heating tube bundle is located, and then enters the cavity where the gas heating tube bundle is located through the through holes in the isolation plate.
As a further technical scheme, a gas premixing cavity is arranged between the gas inlet pipe and the gas heating pipe bundle, and a first spiral plate and a first flow stabilizing plate are arranged in the gas premixing cavity.
As a further technical scheme, a plurality of through holes are circumferentially formed in the first flow stabilizing plate.
As a further technical scheme, the gas heating tube bundle comprises a plurality of vertical heating tubes, and the vertical heating tubes are communicated with the gas premixing cavity.
As a further technical scheme, a water storage cavity is arranged between the water inlet pipe and the water heating pipe bundle and is communicated with the water heating pipe bundle.
As a further technical scheme, the water heating tube bundle is formed by spirally winding a plurality of heating tubes.
As a further technical scheme, the through holes are formed in one end of the isolation plate far away from the high-temperature tail gas inlet pipe, and the through holes are circumferentially formed in the isolation plate and are uniformly spaced.
As a further technical scheme, a second spiral plate and a second flow stabilizing plate are arranged in the mixing cavity, and a plurality of through holes are circumferentially formed in the second flow stabilizing plate.
As a further technical scheme, a high-temperature tail gas discharge pipe is further arranged on the shell and is communicated with a cavity where the fuel gas heating tube bundle is located.
As a further technical scheme, the mixing cavity is also communicated with a mixed gas outlet pipe.
The beneficial effects of the embodiment of the utility model are as follows:
(1) The steam generator provided by the utility model adopts a dividing wall type heat exchange mode, comprises a water storage cavity, a fuel gas premixing cavity, a fuel gas heating tube bundle, a water heating tube bundle and a mixing cavity of water vapor and fuel gas, and divides the heating process of water/water vapor and methane-rich fuel gas into subareas, sequentially heats and mixes, the high-temperature tail gas firstly heats water, and then heats the methane-rich fuel gas after the temperature of the tail gas is reduced, so that the pressure drop loss can be effectively controlled and the methane heating carbon deposition phenomenon can be prevented on the premise of ensuring the heat exchange capability.
(2) The steam generator provided by the utility model can control the heat exchange capacity by adjusting the parameters such as the number, the diameter, the screw pitch of the spiral water heating pipes and the parameters such as the number and the diameter of the vertical pipes.
(3) According to the steam generator provided by the utility model, the evaporation heating process of the liquid water and the heating process of the methane-rich fuel gas are independently carried out, so that the mutual influence of the liquid water and the fuel gas can be avoided, and the pressure fluctuation is reduced.
(4) The steam generator provided by the utility model can form an all-in-one thermal component with other thermal components in a nested way, and the steam reforming reaction process in the natural gas reforming hydrogen production process can be completed by only one device; the steam generator can be applied to the all-in-one thermal component, and can be detached from the all-in-one thermal component, so that the all-in-one thermal component has the advantages of modularization and integrity, small size and convenience in maintenance.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model.
Fig. 1 is a schematic view of an external structure of a steam generator of the present utility model;
fig. 2 is a schematic view of the internal structure of the steam generator of the present utility model;
FIG. 3 is a schematic view of the structure of the steam generator at the gas inlet of the present utility model;
FIG. 4 is a schematic view of the structure of the steam generator at the gas mixture outlet;
FIG. 5 is a schematic view of the structure of the gas heating tube bundle of the present utility model;
FIG. 6 is a schematic view of the structure of a water heating tube bundle of the present utility model;
fig. 7 is a schematic structural view of the separator of the present utility model.
The schematic is used only as schematic;
1, a fuel gas inlet pipe; 2. a gas premix chamber; 21. a first spiral plate; 22. a first stabilizer plate; 3. an inner wall surface; 4. a water inlet pipe; 5. a water storage chamber; 6. a water heating tube bundle; 7. a gas heating tube bundle; 8. an outer wall surface; 9. a mixing chamber; 91. a second spiral plate; 92. a second flow stabilizer; 10. a high temperature tail gas inlet pipe; 11. a mixed gas outlet pipe; 12. a high temperature exhaust pipe; 13. a partition plate; 131. and a through hole.
Detailed Description
It should be noted that the following detailed description is illustrative and is intended to provide further explanation of the utility model. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs.
Example 1
In an exemplary embodiment of the present utility model, as shown in fig. 1 and 2, there is provided a steam generator for producing synthesis gas by reforming methane, which comprises a housing having an annular cavity structure formed by an inner wall surface 3 and an outer wall surface 8, and a gas heating tube bundle 7 and a water heating tube bundle 6 are disposed in the annular cavity, wherein the gas heating tube bundle 7 is disposed at the periphery of the water heating tube bundle 6 and is partitioned by a partition plate 13; one end of the gas heating tube bundle 7 is communicated with the gas inlet tube 1, the other end of the gas heating tube bundle is communicated with the mixing cavity 9, one end of the water heating tube bundle 6 is communicated with the water inlet tube 4, and the other end of the water heating tube bundle is communicated with the mixing cavity 9; the shell is also provided with a high-temperature tail gas inlet pipe 10, and the high-temperature tail gas enters the cavity where the heating tube bundle is located through a through hole 131 in the isolation plate 13.
Specifically, as shown in fig. 3, a gas premixing cavity 2 is disposed between the gas inlet pipe 1 and the gas heating tube bundle 7, a first spiral plate 21 and a first flow stabilizing plate 22 are disposed in the gas premixing cavity 2, a plurality of through holes are circumferentially disposed on the first flow stabilizing plate 22, the first spiral plate 21 is used for promoting mixing in the flowing process of the methane-rich gas, the first flow stabilizing plate 22 is helpful for the methane-rich gas to uniformly enter the gas heating tube bundle 7, the gas heating tube bundle 7 is structured as shown in fig. 5, the gas heating tube bundle 7 comprises a plurality of vertical heating tubes, two ends of each vertical heating tube are fixed through annular tube plates, a plurality of through holes are disposed on the annular tube plates and correspond to the plurality of vertical heating tubes, the vertical heating tubes are communicated with the gas premixing cavity, the gas premixing cavity 2 is communicated with the gas inlet pipe 1, and the methane-rich gas enters the gas premixing cavity 2 after being mixed in the gas premixing cavity 1 and uniformly enters the gas heating tube bundle 7.
As shown in fig. 4, a second spiral plate 91 and a second flow stabilizing plate 92 are disposed in the mixing chamber 9, a plurality of through holes are circumferentially disposed on the second flow stabilizing plate 92, and the second spiral plate 91 and the second flow stabilizing plate 92 are used for promoting the mixture to mix and flow smoothly, and the mixing chamber 9 is also communicated with the mixture outlet pipe 11, so as to realize that the mixture is discharged out of the steam generator.
In this embodiment, a water storage cavity 5 is disposed between the water inlet pipe 4 and the water heating tube bundle 6, the water storage cavity 5 is communicated with the water heating tube bundle 6, as shown in fig. 6, the water heating tube bundle 6 is formed by spirally winding a plurality of heating tubes, and complete evaporation of liquid water in the water heating tube bundle can be achieved by adjusting parameters such as the number, diameter, pitch of the spiral tubes and the like of the spiral water heating tubes.
As shown in fig. 7, the through holes 131 are disposed at one end of the isolation plate 13 far away from the high-temperature tail gas inlet pipe, the through holes 131 are circumferentially disposed on the isolation plate 13 and are uniformly spaced, the shape of the through holes 131 can be round, square or other shapes, the cavity where the high-temperature tail gas is located is advanced by the arrangement of the through holes, then the cavity where the gas heating tube bundle is located is entered, the high-temperature tail gas is utilized to heat water first, so that the water is changed into water vapor, then the gas is heated, and a temperature condition is provided for methane reforming to prepare synthetic gas. Further, a high-temperature tail gas discharge pipe 12 is further arranged on the shell, and the high-temperature tail gas discharge pipe 12 is communicated with a cavity where the fuel gas heating tube bundle is located, so that the high-temperature tail gas cooled by heat is discharged out of the steam generator.
The working process of the steam generator for preparing the synthetic gas by reforming methane provided by the embodiment is as follows:
the methane-rich gas enters the gas premixing cavity 2 through the gas inlet pipe 1, and the fact that the components in the methane-rich gas are possibly mixed unevenly is considered, so that the methane-rich gas is firstly mixed evenly in the gas premixing cavity 2, then enters the gas heating tube bundle 7 and is heated in the gas heating tube bundle 7; the water enters the water storage cavity 5 through the water inlet pipe 4, then uniformly enters the water heating pipe bundle 6 and is heated and evaporated in the water heating pipe bundle 6, the evaporated water vapor and the heated fuel gas are mixed in the mixing cavity 9, and the mixed gas is discharged through the mixed gas outlet pipe 11.
Meanwhile, the high-temperature tail gas enters the steam generator through the high-temperature tail gas inlet pipe 10, the gas heating pipe bundle 7 and the water heating pipe bundle 6 are separated by the separating plate 13, the high-temperature tail gas firstly flows through the cavity where the water heating pipe bundle 6 is located (formed by the inner wall surface 3 and the separating plate 13) and heats water in the water heating pipe bundle 6, then the high-temperature tail gas enters the cavity where the gas heating pipe bundle 7 is located (formed by the outer wall surface 8 and the separating plate 13) through the through hole 131 at the bottom of the separating plate 13 and heats gas in the gas heating pipe bundle 7, and the high-temperature tail gas flows out of the steam generator through the high-temperature tail gas discharge pipe 12 after heat exchange is finished.
The steam generator provided by the embodiment can realize the zone heating of liquid water and fuel gas, the spiral water heating tube bundle should ensure that the liquid water is completely evaporated in the zone, and the zone heating can be realized by adjusting the quantity, diameter, spiral tube pitch and other parameters of the spiral water heating tubes; the vertical gas heating tube bundle is used for heating gas, and the heating capacity of the vertical gas heating tube bundle 7 can be realized by adjusting parameters such as the number, the diameter and the like of vertical tubes.
The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.
Claims (10)
1. The steam generator for preparing the synthetic gas by reforming methane is characterized by comprising a shell, wherein a gas heating tube bundle and a water heating tube bundle are arranged in the shell, and the gas heating tube bundles are arranged on the periphery of the water heating tube bundle and are separated by a separation plate; one end of the gas heating tube bundle is communicated with the gas inlet tube, the other end of the gas heating tube bundle is communicated with the mixing cavity, one end of the water heating tube bundle is communicated with the water inlet tube, and the other end of the water heating tube bundle is communicated with the mixing cavity; the shell is also provided with a high-temperature tail gas inlet pipe, the high-temperature tail gas enters the cavity where the heating tube bundle is located, and then enters the cavity where the gas heating tube bundle is located through the through holes in the isolation plate.
2. The steam generator for producing synthesis gas by reforming methane according to claim 1, wherein a gas premix chamber is provided between the gas inlet pipe and the gas heating tube bundle, and a first spiral plate and a first flow stabilizing plate are provided in the gas premix chamber.
3. The steam generator for producing synthesis gas by reforming methane according to claim 2, wherein the first stabilizer plate is provided with a plurality of through holes in the circumferential direction.
4. The steam generator for producing synthesis gas by reforming methane according to claim 2, wherein the gas heating tube bundle comprises a plurality of vertical heating tubes, the vertical heating tubes being in communication with a gas premix chamber.
5. The steam generator for producing synthesis gas by reforming methane according to claim 1, wherein a water storage chamber is provided between the water inlet pipe and the water heating tube bundle, and the water storage chamber is communicated with the water heating tube bundle.
6. The steam generator for producing synthesis gas by reforming methane according to claim 5, wherein the water heating tube bundle is formed by spirally winding a plurality of heating tubes.
7. The steam generator for methane reforming synthesis gas according to claim 1, wherein the through holes are provided at one end of the partition plate remote from the high-temperature exhaust gas inlet pipe, and the through holes are provided in plurality in the circumferential direction on the partition plate at uniform intervals.
8. The steam generator for producing synthesis gas by reforming methane according to claim 1, wherein the second spiral plate and the second flow stabilizing plate are arranged in the mixing cavity, and a plurality of through holes are circumferentially arranged on the second flow stabilizing plate.
9. The steam generator for producing synthesis gas by reforming methane according to claim 1, wherein the shell is further provided with a high-temperature tail gas discharge pipe, and the high-temperature tail gas discharge pipe is communicated with a cavity in which the gas heating tube bundle is located.
10. The steam generator for producing synthesis gas by reforming methane according to claim 1, wherein the mixing chamber is further in communication with a mixture outlet pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321312425.7U CN220169424U (en) | 2023-05-25 | 2023-05-25 | Steam generator for preparing synthetic gas by methane reforming |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321312425.7U CN220169424U (en) | 2023-05-25 | 2023-05-25 | Steam generator for preparing synthetic gas by methane reforming |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220169424U true CN220169424U (en) | 2023-12-12 |
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ID=89056113
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321312425.7U Active CN220169424U (en) | 2023-05-25 | 2023-05-25 | Steam generator for preparing synthetic gas by methane reforming |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220169424U (en) |
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2023
- 2023-05-25 CN CN202321312425.7U patent/CN220169424U/en active Active
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