CN215028705U - Self-heating type reactor for preparing methane by catalytic hydrogenation of carbon dioxide - Google Patents
Self-heating type reactor for preparing methane by catalytic hydrogenation of carbon dioxide Download PDFInfo
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- CN215028705U CN215028705U CN202022937628.8U CN202022937628U CN215028705U CN 215028705 U CN215028705 U CN 215028705U CN 202022937628 U CN202022937628 U CN 202022937628U CN 215028705 U CN215028705 U CN 215028705U
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Abstract
The utility model discloses a self-heating carbon dioxide catalytic hydrogenation methane preparation reactor, include: the inner space of the cylindrical tubular shell is divided into three mutually isolated spaces by an upper sealing plate and a lower sealing plate which are parallel to each other; a plurality of parallel reaction tubes are arranged in the reaction section of the tubular shell, the upper ends of tube passes of the reaction tubes are communicated with the upper sealing section through corresponding through holes of the upper sealing plate, and the lower ends of the tube passes of the reaction tubes are communicated with the lower sealing section through corresponding through holes of the lower sealing plate; filling a solid catalyst in the reaction tube; the upper sealing plate and the lower sealing plate respectively seal the gap between the tubular shell and the reaction tube, so that the gap between the tubular shell and the reaction tube forms a shell pass; the lower part of the reaction section of the tubular shell is provided with a raw material gas inlet which is communicated with the shell pass; the upper sealing plate is covered with a plurality of vent holes at the part of the shell pass; and a discharge hole is formed in the lower sealing section shell. The utility model discloses simple structure, convenient operation realizes utilizing the purpose that methanation reaction heat preheats the reaction raw materials, can effectively reduce system energy consumption and operating cost.
Description
Technical Field
The utility model belongs to the technical field of the chemical industry, concretely relates to self-heating carbon dioxide catalytic hydrogenation methane preparation reactor.
Background
At present, the emission of greenhouse gases represented by carbon dioxide causes various problems such as global warming, glacier thawing, sea level rising and the like. At the same time, the large amount of carbon dioxide also poses a serious challenge to global agricultural production and ecosystems. The problem of carbon dioxide emission reduction has become a common topic in various countries in the world.
On the other hand, due to the unbalanced distribution of natural resources, renewable energy resources such as photoelectricity, wind power, hydropower and the like are abundant in areas represented by the Chinese and western parts of China, but the economic development is relatively lagged behind, and the phenomena of ' light abandonment ', wind abandonment ' and the like are caused by surplus electric power. Methane is the main component of natural gas, is also an important fuel, and can be delivered to various end users through a natural gas pipeline network. The electrical gas (PtG) technology is receiving increasing attention to convert excess electricity to methane through electrolytic hydrogen production and carbon dioxide hydromethanation processes.
The core equipment in the carbon dioxide hydromethanation process is a methanation reactor. Chinese patent document CN110354765A discloses a photothermal fixed bed reaction experimental device and method for carbon dioxide hydrogenation methanation reaction, wherein the upper surface, the lower surface, the front surface and the rear surface of a reaction box body are respectively provided with a xenon lamp and a reflector, and the four lamp tubes can make the temperature of a catalyst bed layer more uniform, but the reactor is complex in design and difficult to industrially apply. Chinese patent document CN103752227A discloses a methanation reactor with two shells, an inner shell and an outer shell, but the heat exchange area between the two shells is limited, and the heat exchange effect is poor. Chinese patent document CN107224940A discloses a radial fixed bed methanation reactor, which uses the reaction heat to produce by-product steam, but the reactor has problems of complicated design and low utilization efficiency of the reaction heat. Chinese patent document CN103920429A discloses an axial fixed bed methanation reactor, but does not fully utilize the heat of methanation reaction, resulting in energy loss.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a self-heating carbon dioxide catalytic hydrogenation system methane reactor can utilize methanation reaction heat to preheat the reaction raw materials, the low system energy consumption in situ to solve the design complicacy that exists among the prior art, heat transfer effect is poor, reaction heat utilization efficiency hangs down the scheduling problem.
In order to realize the purpose, the technical scheme of the utility model is that:
an autothermal carbon dioxide catalytic hydrogenation methane production reactor comprising: the inner space of the cylindrical tubular shell is divided into three mutually isolated spaces by an upper sealing plate and a lower sealing plate which are parallel to each other, the upper part of the upper sealing plate is provided with an upper sealing section, a reaction section is arranged between the upper sealing plate and the lower sealing plate, and the lower part of the lower sealing plate is provided with a lower sealing section; a plurality of parallel reaction tubes are arranged in the reaction section of the tubular shell, the upper ends of tube passes of the reaction tubes are communicated with the upper sealing section through corresponding through holes of the upper sealing plate, and the lower ends of the tube passes of the reaction tubes are communicated with the lower sealing section through corresponding through holes of the lower sealing plate; solid catalysts are filled in the reaction tubes, and different filling modes are selected according to different forms of catalysts on the market; the reaction tube is characterized in that the upper sealing plate and the lower sealing plate respectively seal gaps between the tubular shell and the reaction tube, so that the gaps between the tubular shell and the reaction tube form a shell pass; the lower part of the reaction section of the tubular shell is provided with a raw material gas inlet which is communicated with the shell pass; the upper sealing plate covers the part of the shell pass and is provided with a plurality of vent holes which are used as gas outlets of the shell pass; and a discharge port is arranged on the lower sealing section shell, and the material after the reaction in the reaction tube is finished enters the lower sealing section and is discharged from the discharge port.
Compared with the prior art, the utility model, there is following benefit:
the utility model discloses simple structure, convenient operation through the material heat transfer between reactor tube side and the shell side, realizes utilizing methanation reaction heat to preheat the purpose of reaction raw materials, when sparingly preheating the required energy consumption of reaction raw materials, saves and removes the required cooling energy consumption of reaction heat, can effectively reduce system energy consumption and operating cost.
Drawings
Fig. 1 is a schematic structural view of the present invention;
in the figure: the method comprises the following steps of 1-tubular shell, 2-reaction tube, 3-catalyst bed, 4-shell pass, 5-upper sealing plate, 6-lower sealing plate, 7-raw material gas inlet, 8-discharge port, 9-lower sealing section shell, 10-upper sealing section shell and 11-vent hole.
Detailed Description
It should be understood by those skilled in the art that the present embodiment is only for illustrating the present invention and is not used as a limitation of the present invention, and that changes and modifications to the embodiment may be made within the scope of the claims of the present invention.
As shown in fig. 1. An autothermal carbon dioxide catalytic hydrogenation methane production reactor comprising: the inner space of the cylindrical tubular shell 1 is divided into three mutually isolated spaces by an upper seal plate 5 and a lower seal plate 6 which are parallel to each other, the upper part of the upper seal plate 5 is an upper seal section, a reaction section is arranged between the upper seal plate 5 and the lower seal plate 6, and the lower part of the lower seal plate 6 is a lower seal section; a plurality of parallel reaction tubes 2 are arranged in the reaction section of the tubular shell 1, the upper ends of tube passes of the reaction tubes are communicated with the upper sealing section through corresponding through holes of the upper sealing plate 5, and the lower ends of the tube passes of the reaction tubes are communicated with the lower sealing section through corresponding through holes of the lower sealing plate 6; the reaction tube 2 is filled with a solid catalyst 3, and different filling modes are selected according to different forms of catalysts on the market; the upper sealing plate 5 and the lower sealing plate 6 respectively seal the gap between the tubular shell 1 and the reaction tube 2, so that the gap between the four forms a shell pass 4; the lower part of the reaction section of the tubular shell 1 is provided with a raw material gas inlet 7 communicated with the shell pass 4; the part of the upper sealing plate 5, which covers the shell pass 4, is provided with a plurality of vent holes 11 which are used as gas outlets of the shell pass 4; and a discharge port 8 is formed in the lower sealing section shell 9, and the materials after the reaction in the reaction tube 2 enter the lower sealing section and are discharged from the discharge port 8.
Furthermore, a reinforced heat exchange mechanism is arranged in the shell pass 4 of the tubular shell 1, and the reinforced heat exchange mechanism is one of a baffle plate, random packing and structured packing and is used for prolonging the retention time of the feed gas and better performing heat exchange.
Furthermore, the horizontal position of the feed gas inlet 7 is close to the lower sealing plate 6, which is beneficial to the full utilization of reaction heat.
Further, the length-diameter ratio of the tubular shell 1 is 0.5-150; the inner diameter of the reaction tube 2 is 10 mm-100 mm, and the number of the reaction tubes is 3-5000 generally.
Further, the reaction tubes 2 are arranged on the upper sealing plate 5 and the lower sealing plate 6 in one of regular triangle, square straight line and square staggered arrangement.
Further, the aperture ratio of the vent hole 11 on the upper sealing plate 5 is 1% to 60%.
Further, the lower seal section shell 9 and the upper seal section shell 10 are in one of an oval shape, a semispherical shape and a flat plate shape; a thermometer and an exhaust valve are arranged at the top of the upper sealing section shell 10, and the exhaust valve is used for discharging unreacted gas during pressure relief or production stop.
Claims (9)
1. An autothermal carbon dioxide catalytic hydrogenation methane production reactor comprising: the inner space of the cylindrical tubular shell (1) is divided into three mutually isolated spaces by an upper sealing plate (5) and a lower sealing plate (6) which are parallel to each other, the upper part of the upper sealing plate (5) is provided with an upper sealing section, a reaction section is arranged between the upper sealing plate (5) and the lower sealing plate (6), and the lower part of the lower sealing plate (6) is provided with a lower sealing section; a plurality of parallel reaction tubes (2) are arranged in the reaction section of the tubular shell (1), the upper ends of tube passes of the reaction tubes are communicated with the upper sealing section through corresponding through holes of the upper sealing plate (5), and the lower ends of the tube passes of the reaction tubes are communicated with the lower sealing section through corresponding through holes of the lower sealing plate (6); the reaction tube (2) is filled with a solid catalyst (3);
the reaction tube is characterized in that the upper sealing plate (5) and the lower sealing plate (6) respectively seal off a gap between the tubular shell (1) and the reaction tube (2), so that the gap between the four gaps forms a shell pass (4); the lower part of the reaction section of the tubular shell (1) is provided with a raw material gas inlet (7) communicated with the shell pass (4); the part of the upper sealing plate (5) covering the shell pass (4) is provided with a plurality of vent holes (11); a discharge hole (8) is arranged on the lower sealing section shell (9).
2. The reactor for preparing methane by catalytic hydrogenation of carbon dioxide in an autothermal form of claim 1, wherein a heat exchange enhancement mechanism is arranged in the shell pass (4) of the tubular shell (1), and the heat exchange enhancement mechanism is one of a baffle plate, random packing and structured packing.
3. The reactor for methane production by catalytic hydrogenation of carbon dioxide according to claim 1, wherein the feed gas inlet (7) is positioned horizontally next to the lower closing plate (6).
4. The reactor for preparing methane by catalytic hydrogenation of carbon dioxide in an autothermal form of claim 1, wherein the length to diameter ratio of the tubular shell (1) is 0.5-150.
5. The reactor for preparing methane by catalytic hydrogenation of carbon dioxide in an autothermal form according to claim 1, wherein the reaction tubes (2) have an inner diameter of 10 to 100mm and a number of 3 to 5000.
6. The reactor for methane production through catalytic hydrogenation of carbon dioxide with self-heating type according to claim 1, wherein the arrangement of the reaction tubes (2) on the upper sealing plate (5) and the lower sealing plate (6) is one of regular triangle, square straight line and square staggered.
7. The reactor for methane production by catalytic hydrogenation of carbon dioxide according to claim 1, wherein the vent holes (11) have an opening ratio of 1% to 60% in the upper sealing plate (5).
8. The reactor for methane production by catalytic hydrogenation of carbon dioxide with self-heating according to claim 1, wherein the lower seal segment shell (9) and the upper seal segment shell (10) have one of an oval shape, a hemispherical shape and a flat plate shape.
9. The reactor for methane production by catalytic hydrogenation of carbon dioxide with self-heating according to claim 8, wherein a thermometer and a vent valve are provided on the top of the upper block shell (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022937628.8U CN215028705U (en) | 2020-12-10 | 2020-12-10 | Self-heating type reactor for preparing methane by catalytic hydrogenation of carbon dioxide |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022937628.8U CN215028705U (en) | 2020-12-10 | 2020-12-10 | Self-heating type reactor for preparing methane by catalytic hydrogenation of carbon dioxide |
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| Publication Number | Publication Date |
|---|---|
| CN215028705U true CN215028705U (en) | 2021-12-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022937628.8U Active CN215028705U (en) | 2020-12-10 | 2020-12-10 | Self-heating type reactor for preparing methane by catalytic hydrogenation of carbon dioxide |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215028705U (en) |
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2020
- 2020-12-10 CN CN202022937628.8U patent/CN215028705U/en active Active
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