CN211570115U - Membrane separation purification device heat exchange system for methanol-water hydrogenation station - Google Patents
Membrane separation purification device heat exchange system for methanol-water hydrogenation station Download PDFInfo
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- CN211570115U CN211570115U CN201921826862.4U CN201921826862U CN211570115U CN 211570115 U CN211570115 U CN 211570115U CN 201921826862 U CN201921826862 U CN 201921826862U CN 211570115 U CN211570115 U CN 211570115U
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Abstract
The utility model relates to a membrane separation and purification device heat exchange system for a methanol-water hydrogenation station, which comprises a membrane separation and purification device, wherein the membrane separation and purification device is provided with an air inlet pipe, a second air outlet pipe and a first air outlet pipe; the second heat exchanger and the fourth heat exchanger are arranged on the second gas outlet pipe, the second heat exchanger is suitable for exchanging heat of the pure hydrogen with methanol water, and the fourth heat exchanger is suitable for exchanging heat of the pure hydrogen with mixed gas of hydrogen, carbon dioxide and carbon monoxide; the first air outlet pipe is provided with a first heat exchanger and a third heat exchanger; the first heat exchanger is suitable for exchanging heat of the carbon dioxide mixed residual gas with methanol water, and the third heat exchanger is suitable for exchanging heat of the carbon dioxide mixed residual gas with mixed gas of hydrogen, carbon dioxide and carbon monoxide. The heat of the mixed residual gas of the pure hydrogen and the carbon dioxide is fully recycled, and the recycled part of heat is used for vaporizing the mixed gas of the methanol water and the preheated hydrogen, the carbon dioxide and the carbon monoxide.
Description
Technical Field
The utility model relates to a methanol-water adds hydrogen station and uses membrane separation purification device heat transfer system.
Background
The hydrogen energy is the most ideal energy in the 21 st century, is used as automobile fuel, is easy to start at low temperature, has small corrosion effect on an engine, and can prolong the service life of the engine. Because the hydrogen and the air can be uniformly mixed, a carburetor used on a common automobile can be completely omitted, and the structure of the existing automobile can be simplified. It is more interesting to add only 4% hydrogen to the gasoline. When it is used as fuel of automobile engine, it can save oil by 40%, and has no need of making great improvement on gasoline engine. A hydrogen fuel cell serves as a power generation system.
No pollution, and no pollution to environment caused by fuel cell. It is through electrochemical reaction, rather than combustion (gasoline, diesel) or energy storage (battery) -the most typical traditional backup power scheme. Combustion releases pollutants like COx, NOx, SOx gases and dust. As described above, the fuel cell generates only water and heat. If the hydrogen is generated by renewable energy sources (photovoltaic panels, wind power generation, etc.), the whole cycle is a complete process without generating harmful emissions.
No noise, quiet fuel cell operation, about only 55dB noise, which corresponds to the level of normal human conversation. This makes the fuel cell suitable for a wide range of applications, including indoor installations, or where there is a limit to noise outdoors.
The efficiency is high, the generating efficiency of the fuel cell can reach more than 50%, which is determined by the conversion property of the fuel cell, chemical energy is directly converted into electric energy without intermediate conversion of heat energy and mechanical energy (a generator), and the efficiency is reduced once more because of once more energy conversion.
At present, the main source of hydrogen of a hydrogen energy source hydrogenation station is that an energy storage tank is transported back from outside, and the whole hydrogenation station needs to store a large amount of hydrogen; research finds that hydrogen in the hydrogen energy industry comprises four links, namely hydrogen preparation, hydrogen storage, hydrogen transportation and hydrogen addition (adding hydrogen into a hydrogen energy vehicle), wherein the two links of hydrogen preparation and hydrogen addition are safe at present, accidents easily occur in the hydrogen storage link, and the cost of the hydrogen transportation link is high and is related to the characteristics of hydrogen; the problems of fire and explosion of the hydrogenation station and the reason of high hydrogenation cost frequently appear in the current news.
If the methanol reforming field is adopted for hydrogen production, the methanol stored with hydrogen is transported and transported in liquid state under normal pressure, so that the cost is low, the transportation capacity is large, and meanwhile, the requirements on transportation equipment in the current society are low, the change is less, and the method is suitable for large-scale popularization.
At present, a system for producing hydrogen by methanol water is developed, and the principle of the hydrogen production system is as follows: heating methanol water into methanol steam, then preparing the methanol steam into mixed gas of hydrogen, carbon dioxide and carbon monoxide through a reformer, and separating the mixed gas of the hydrogen, the carbon dioxide and the carbon monoxide into pure hydrogen and carbon dioxide mixed residual gas through a membrane separation and purification device.
In the hydrogen production system, the operating temperature of the membrane separation and purification device is up to 380-420 ℃, and the temperature of the separated pure hydrogen and carbon dioxide mixed residual gas is 380-420 ℃; in the past, the heat is not fully utilized, and the heat waste is serious.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is: the defects of the prior art are overcome, the membrane separation and purification device heat exchange system for the methanol-water hydrogenation station is provided, and the defect that pure hydrogen and carbon dioxide mixed residual gas heat separated by the membrane separation and purification device in the past is wasted is solved.
The utility model provides a technical scheme that its technical problem adopted is: a heat exchange system of a membrane separation and purification device for a methanol-water hydrogenation station comprises the membrane separation and purification device, wherein an air inlet pipe for inputting mixed gas of hydrogen, carbon dioxide and carbon monoxide, a second air outlet pipe for outputting pure hydrogen and a first air outlet pipe for outputting carbon dioxide mixed residual gas are arranged on the membrane separation and purification device;
the second gas outlet pipe is provided with a second heat exchanger and a fourth heat exchanger, and pure hydrogen conveyed in the second gas outlet pipe is output after being subjected to heat exchange and cooling through the fourth heat exchanger and the second heat exchanger in sequence; the second heat exchanger is suitable for exchanging heat of the pure hydrogen with methanol water, and the fourth heat exchanger is suitable for exchanging heat of the pure hydrogen with mixed gas of hydrogen, carbon dioxide and carbon monoxide;
the first gas outlet pipe is provided with a first heat exchanger and a third heat exchanger, and the carbon dioxide mixed residual gas conveyed in the first gas outlet pipe is output after being subjected to heat exchange and cooling through the third heat exchanger and the first heat exchanger in sequence; the first heat exchanger is suitable for exchanging heat of the carbon dioxide mixed residual gas with methanol water, and the third heat exchanger is suitable for exchanging heat of the carbon dioxide mixed residual gas with mixed gas of hydrogen, carbon dioxide and carbon monoxide.
The utility model has the advantages that:
the heat exchange system of the membrane separation and purification device for the methanol water hydrogenation station is provided, the heat of the carbon dioxide mixed residual gas is absorbed by a first heat exchanger and a third heat exchanger, the heat of the pure hydrogen is absorbed by a second heat exchanger and a fourth heat exchanger, and then the heat of the first heat exchanger and the heat of the second heat exchanger are used for exchanging heat with the methanol water of the hydrogen production system, so that the methanol water is vaporized into methanol steam; the heat of the third heat exchanger and the fourth heat exchanger is used for exchanging heat with the mixed gas of hydrogen, carbon dioxide and carbon monoxide of the hydrogen production system, so that the mixed gas of the hydrogen, the carbon dioxide and the carbon monoxide is preheated and enters a membrane separation and purification device after being preheated; the heat of the pure hydrogen and the mixed residual gas is fully utilized.
Drawings
The present invention will be further explained with reference to the accompanying drawings.
FIG. 1 is a schematic diagram of a heat exchange system of a membrane separation and purification device;
the device comprises a membrane separation and purification device 1, a first heat exchanger 2, a second heat exchanger 3, a third heat exchanger 4, a fourth heat exchanger 5, a gas inlet pipe 6, a first gas outlet pipe 7, a first gas outlet pipe 8 and a second gas outlet pipe.
Detailed Description
The invention will now be further described with reference to specific embodiments. The drawings are simplified schematic diagrams only illustrating the basic structure of the present invention in a schematic manner, and thus show only the components related to the present invention.
As shown in figure 1, a membrane separation purification device heat transfer system for methanol-water hydrogenation station, includes membrane separation purification device 1, set up intake pipe 6, second outlet duct 8 and first outlet duct 7 on membrane separation purification device 1.
The gas inlet pipe 6 is used for inputting mixed gas of hydrogen, carbon dioxide and carbon monoxide into the membrane separation and purification device 1; the first gas outlet pipe 7 is used for outputting the carbon dioxide mixed residual gas separated by the membrane separation and purification device 1; and the second gas outlet pipe 8 is used for outputting the pure hydrogen separated by the membrane separation and purification device 1.
The second gas outlet pipe 8 is provided with a second heat exchanger 3 and a fourth heat exchanger 5, and pure hydrogen gas conveyed in the second gas outlet pipe 8 is output after being subjected to heat exchange and temperature reduction through the fourth heat exchanger 5 and the second heat exchanger 3 in sequence; the second heat exchanger 3 is suitable for exchanging heat of pure hydrogen with methanol water, and the fourth heat exchanger 5 is suitable for exchanging heat of pure hydrogen with mixed gas of hydrogen, carbon dioxide and carbon monoxide.
The first heat exchanger 2 and the third heat exchanger 4 are arranged on the first air outlet pipe 7, and the carbon dioxide mixed residual gas conveyed in the first air outlet pipe 7 is output after heat exchange and cooling through the third heat exchanger 4 and the first heat exchanger 2 in sequence; first heat exchanger 2 is suitable for carrying out the heat transfer with the heat and the methanol-water of carbon dioxide mixed residual gas, third heat exchanger 4 is suitable for carrying out the heat transfer with the heat and the mist of hydrogen, carbon dioxide and carbon monoxide of carbon dioxide mixed residual gas.
In the system for producing hydrogen from methanol water, the methanol water is vaporized into methanol water vapor, then the methanol water vapor enters a reformer to be made into mixed gas of hydrogen, carbon dioxide and carbon monoxide, and then the mixed gas enters a membrane separation and purification device 1 to be separated into mixed residual gas of pure hydrogen and carbon dioxide.
In the heat exchange system of the membrane separation and purification device 1 in the embodiment, the operating temperature of the membrane separation and purification device 1 is 380-420 ℃, and the temperature of the mixed residual gas of the separated pure hydrogen and carbon dioxide is 380-420 ℃; pure hydrogen flows through the second air outlet pipe 8, and carbon dioxide mixed residual gas flows through the first air outlet pipe 7; the 380-420 ℃ carbon dioxide mixed residual gas in the first air outlet pipe 7 exchanges heat with the third heat exchanger 4 and then exchanges heat with the first heat exchanger 2; the heat exchange temperature of the third heat exchanger 4 is about 300 ℃, and the heat exchange temperature of the first heat exchanger 2 is about 200 ℃;
pure hydrogen gas at 380-420 ℃ in the second air outlet pipe 8 exchanges heat with the fourth heat exchanger 5 and then exchanges heat with the second heat exchanger 3; the heat exchange temperature of the fourth heat exchanger 5 is about 300 ℃, and the heat exchange temperature of the second heat exchanger 3 is about 200 ℃.
The material channels in the first heat exchanger 2 and the second heat exchanger 3 are used for conveying methanol water, the heat exchange channel of the first heat exchanger 2 is used for conveying carbon dioxide mixed residual gas, and the heat exchange channel of the second heat exchanger 3 is used for conveying pure hydrogen. Two paths of methanol water of the hydrogen production system are vaporized into methanol steam after passing through the first heat exchanger 2 and the second heat exchanger 3 respectively, then the methanol steam enters the reformer to generate mixed gas of hydrogen, carbon dioxide and carbon monoxide, then the mixed gas is divided into two paths to pass through the third heat exchanger 4 and the fourth heat exchanger 5 respectively, the mixed gas is heated to about 300 ℃, and then the mixed gas is sent into the membrane separation and purification device 1 through the gas inlet pipe 6 to produce hydrogen.
The utility model discloses a methanol-water adds hydrogen station and uses 1 heat transfer system of membrane separation purification device, the heat of the mixed residual gas of abundant recycle pure hydrogen and carbon dioxide, this part heat that makes the recovery is used for vaporizing methanol-water and the mist of preheating hydrogen, carbon dioxide and carbon monoxide.
In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (1)
1. A heat exchange system of a membrane separation and purification device for a methanol water hydrogenation station is characterized by comprising the membrane separation and purification device, wherein an air inlet pipe for inputting mixed gas of hydrogen, carbon dioxide and carbon monoxide, a second air outlet pipe for outputting pure hydrogen and a first air outlet pipe for outputting carbon dioxide mixed residual gas are arranged on the membrane separation and purification device;
the second gas outlet pipe is provided with a second heat exchanger and a fourth heat exchanger, and pure hydrogen conveyed in the second gas outlet pipe is output after being subjected to heat exchange and cooling through the fourth heat exchanger and the second heat exchanger in sequence; the second heat exchanger is suitable for exchanging heat of the pure hydrogen with methanol water, and the fourth heat exchanger is suitable for exchanging heat of the pure hydrogen with mixed gas of hydrogen, carbon dioxide and carbon monoxide;
the first gas outlet pipe is provided with a first heat exchanger and a third heat exchanger, and the carbon dioxide mixed residual gas conveyed in the first gas outlet pipe is output after being subjected to heat exchange and cooling through the third heat exchanger and the first heat exchanger in sequence; the first heat exchanger is suitable for exchanging heat of the carbon dioxide mixed residual gas with methanol water, and the third heat exchanger is suitable for exchanging heat of the carbon dioxide mixed residual gas with mixed gas of hydrogen, carbon dioxide and carbon monoxide.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921826862.4U CN211570115U (en) | 2019-10-28 | 2019-10-28 | Membrane separation purification device heat exchange system for methanol-water hydrogenation station |
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| CN201921826862.4U CN211570115U (en) | 2019-10-28 | 2019-10-28 | Membrane separation purification device heat exchange system for methanol-water hydrogenation station |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110790233A (en) * | 2019-10-28 | 2020-02-14 | 中科液态阳光(苏州)氢能科技发展有限公司 | Membrane separation purification device heat exchange system for methanol-water hydrogenation station |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110790233A (en) * | 2019-10-28 | 2020-02-14 | 中科液态阳光(苏州)氢能科技发展有限公司 | Membrane separation purification device heat exchange system for methanol-water hydrogenation station |
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