CN113772623A - Methanol skid-mounted hydrogen production machine and hydrogen production method thereof - Google Patents
Methanol skid-mounted hydrogen production machine and hydrogen production method thereof Download PDFInfo
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- CN113772623A CN113772623A CN202111084995.0A CN202111084995A CN113772623A CN 113772623 A CN113772623 A CN 113772623A CN 202111084995 A CN202111084995 A CN 202111084995A CN 113772623 A CN113772623 A CN 113772623A
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B3/00—Hydrogen; Gaseous mixtures containing hydrogen; Separation of hydrogen from mixtures containing it; Purification of hydrogen; Reversible storage of hydrogen
- C01B3/02—Production of hydrogen; Production of gaseous mixtures containing hydrogen
- C01B3/22—Production of hydrogen; Production of gaseous mixtures containing hydrogen by decomposition of gaseous or liquid organic compounds
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B3/00—Hydrogen; Gaseous mixtures containing hydrogen; Separation of hydrogen from mixtures containing it; Purification of hydrogen; Reversible storage of hydrogen
- C01B3/50—Separation of hydrogen or hydrogen-containing gases from gaseous mixtures, e.g. purification
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B2203/00—Integrated processes for the production of hydrogen or synthesis gas
- C01B2203/04—Integrated processes for the production of hydrogen or synthesis gas containing a purification step for the hydrogen or the synthesis gas
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B2203/00—Integrated processes for the production of hydrogen or synthesis gas
- C01B2203/08—Methods of heating or cooling
- C01B2203/0805—Methods of heating the process for making hydrogen or synthesis gas
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
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Abstract
The invention provides a methanol skid-mounted hydrogen production machine and a hydrogen production method thereof. The methanol skid-mounted hydrogen production machine is composed of five skid-mounted bodies, namely a raw material skid, a vaporization overheating reaction skid, a heat exchange cooling separation skid, a pressure swing adsorption skid and an instrument intelligent control skid, wherein the skid-mounted bodies are mutually connected by adopting pipelines; the raw material sledge comprises a raw material tank, a metering tank and a blending tank, and is used for metering, mixing and conveying raw materials; the vaporization overheating reaction sledge comprises a heating furnace and a reactor and is used for vaporization overheating and reaction hydrogen production; the heat exchange cooling separation sledge comprises a heat exchanger, a cooler and a separator and is used for heating raw materials, cooling products and recovering heat; the pressure swing adsorption sledge comprises a pressure swing adsorption device and a hydrogen buffer, wherein the pressure swing adsorption device is used for adsorbing, desorbing and purifying hydrogen, and the hydrogen buffer is used for buffering, stabilizing pressure and outputting hydrogen; the instrument intelligent control sledge is used for controlling the raw material sledge, the vaporization overheating reaction sledge, the heat exchange cooling separation sledge and the pressure swing adsorption sledge. The invention has the advantages of small occupied area, low consumption, low cost, environmental protection and safety.
Description
Technical Field
The invention belongs to the technical field of hydrogen production by methanol, and relates to a methanol skid-mounted hydrogen production machine and a hydrogen production method thereof.
Background
The methanol and steam pass through a catalyst under certain temperature and pressure conditions, and under the action of the catalyst, methanol cracking reaction and carbon monoxide shift reaction are carried out to generate hydrogen and carbon dioxide, which is a multi-component and multi-reaction gas-solid catalytic reaction system. The reaction equation is as follows:
CH3OH→CO+2H2(1)
H2O+CO→CO2+H2(2)
CH3OH+H2O→CO2+3H2(3)
h formed by reforming reaction2And CO2Then subjecting the H to Pressure Swing Adsorption (PSA)2And CO2Separating to obtain high-purity hydrogen.
The existing methanol hydrogen production device needs to be provided with a hydrogen compressor and a hydrogen storage tank, and has the disadvantages of large equipment size, large occupied area and high consumption, thereby causing higher production cost.
Disclosure of Invention
Aiming at the technical problems, the invention aims to provide a methanol skid-mounted hydrogen production machine and a hydrogen production method thereof, which have the advantages of small occupied area, low consumption, low cost, environmental protection and safety.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides a methanol skid-mounted hydrogen production machine, which consists of five skid-mounted bodies, namely a raw material skid, a vaporization overheating reaction skid, a heat exchange cooling separation skid, a pressure swing adsorption skid and an instrument intelligent control skid, wherein the skid-mounted bodies are mutually connected by adopting pipelines; the raw material sledge comprises a raw material tank, a metering tank and a blending tank, and is used for metering, mixing and conveying raw materials; the vaporization overheating reaction sledge comprises a heating furnace and a reactor and is used for vaporization overheating and reaction hydrogen production; the heat exchange cooling separation sledge comprises a heat exchanger, a cooler and a separator and is used for heating raw materials, cooling products and recovering heat; the pressure swing adsorption sledge comprises a pressure swing adsorption device and a hydrogen buffer, wherein the pressure swing adsorption device is used for adsorbing, desorbing and purifying hydrogen, and the hydrogen buffer is used for buffering, stabilizing pressure and outputting hydrogen; the instrument intelligent control sledge is used for controlling the raw material sledge, the vaporization overheating reaction sledge, the heat exchange cooling separation sledge and the pressure swing adsorption sledge.
Preferably, the raw material tank is connected with a raw material pump, the other end of the raw material pump is connected with the heat exchanger, the blending tank is connected with a blending pump, and the other end of the blending pump is connected with the raw material tank.
Preferably, an outlet of the heat exchanger is connected with the heating furnace, an outlet of the heating furnace is connected with the reactor, an outlet of the reactor is connected with the heat exchanger, and the heat exchanger is further connected with the cooler.
Preferably, the outlet of the cooler is connected to the separator, and the outlet of the separator is connected to the blending tank.
The invention also provides a hydrogen production method of the methanol skid-mounted hydrogen production machine, which comprises the following steps: the method comprises the steps of metering methanol and deionized water through a metering tank, stirring and mixing the methanol and the deionized water through a blending tank, conveying the mixed gas to a raw material tank through a blending pump, conveying the mixed gas to a heat exchanger through the raw material pump, carrying out heat exchange to 105-150 ℃, conveying the mixed gas to a heating furnace for vaporization and overheating, conveying the heated mixed gas to a reactor, carrying out reaction at the temperature of 280-320 ℃ for hydrogen production, carrying out heat exchange to 95-120 ℃ through the heat exchanger, cooling the product to 25-40 ℃ through a cooler, conveying the cooled product to a separator, carrying out gas-liquid separation and drying to obtain mixed hydrogen, conveying the mixed hydrogen to a pressure swing adsorption device to obtain purified hydrogen, and buffering the purified hydrogen through a hydrogen buffer and outputting the purified hydrogen.
Preferably, it is measured in percent by weight of 35% methanol and 65% deionized water.
Preferably, the pressure on the outlet of the raw material pump is 0.95 to 1.1 MPa.
Preferably, the vaporization temperature of the heating furnace is 180-200 ℃, and the overheating temperature is 280-320 ℃.
Preferably, the purity of the hydrogen in the mixed hydrogen is 68-72%, and the purity of the purified hydrogen is 99-99.999%.
The invention has the following beneficial effects:
the skid-mounted hydrogen production machine optimizes equipment, cancels a hydrogen compressor and a high-pressure gas tank, reduces energy consumption, improves safety, optimizes process conditions, reduces methanol consumption, has hydrogen production capacity of 100-2000 standard/hour and occupies a floor area of 200-1000 square meters, and has the following advantages:
1. advanced technology, low consumption and low hydrogen cost.
2. Short flow, skid-mounted equipment and small occupied area.
3. The production process is pollution-free, environment-friendly and safe.
4. The hydrogen production machine and the hydrogen utilization equipment are synchronized, and the low-pressure hydrogen can be directly supplied.
Drawings
FIG. 1 is a schematic structural diagram of a methanol skid-mounted hydrogen production machine of the present invention, wherein:
1. a raw material tank, 2, a metering tank, 3, a blending tank, 4, a heating furnace, 5, a reactor, 6, a heat exchanger, 7, a cooler, 8, a separator, 9, a pressure swing adsorption device, 10, a hydrogen buffer, 11, a raw material pump, 12 and a blending pump.
Detailed Description
In order to more clearly illustrate the present invention, the present invention will be described in further detail below with reference to examples and the accompanying drawings. It is to be understood by persons skilled in the art that the following detailed description is illustrative and not restrictive, and is not to be taken as limiting the scope of the invention.
It is to be understood that the components and connections used in the embodiments may be implemented by conventional techniques, and will not be specifically described below.
Examples
The invention provides a methanol skid-mounted hydrogen production machine, which consists of five skid-mounted bodies, namely a raw material skid, a vaporization overheating reaction skid, a heat exchange cooling separation skid, a pressure swing adsorption skid and an instrument intelligent control skid, wherein the skid-mounted bodies are mutually connected by adopting pipelines; the raw material sledge comprises a raw material tank 1, a metering tank 2 and a blending tank 3, wherein the raw material tank 1 is connected with a raw material pump 11, the other end of the raw material pump 11 is connected with a heat exchanger 6, the blending tank 3 is connected with a blending pump 12, and the other end of the blending pump 12 is connected with the raw material tank 1 and can be used for metering, mixing and conveying raw materials; the vaporization overheating reaction sledge comprises a heating furnace 4 and a reactor 5 and is used for vaporization overheating and reaction hydrogen production; the heat exchange cooling separation sledge comprises a heat exchanger 6, a cooler 7 and a separator 8 and is used for heating raw materials, cooling products and recovering heat, an outlet of the heat exchanger 6 is connected with the heating furnace 4, an outlet of the heating furnace 4 is connected with the reactor 5, an outlet of the reactor 5 is connected with the heat exchanger 6, the heat exchanger 6 is also connected with the cooler 7, an outlet of the cooler 7 is connected with the separator 8, and an outlet of the separator 8 is connected with the blending tank 3; the pressure swing adsorption sledge comprises a pressure swing adsorption device 9 and a hydrogen buffer 10, wherein the pressure swing adsorption device 9 is used for adsorbing, desorbing and purifying hydrogen, and the hydrogen buffer 10 is used for buffering, stabilizing and outputting hydrogen; the instrument intelligent control sledge is used for controlling the raw material sledge, the vaporization and overheating reaction sledge, the heat exchange cooling separation sledge and the pressure swing adsorption sledge, and the specific control mode can be set and adjusted according to the actual production requirement and is not specifically limited herein.
A comparison of the skid-mounted hydrogen production machine of the present invention with a conventional hydrogen production plant is shown in table 1.
TABLE 1 comparison of the skid-mounted hydrogen production machine of the present invention with conventional hydrogen production plants
| Name of item | Traditional hydrogen production plant | Skid-mounted hydrogen production machine |
| Floor area | Big (a) | Small |
| Equipment body type | Big (a) | Small |
| Operating pressure | 1～5Mpa | 1Mpa |
| Operating temperature | 250～280℃ | 280℃ |
| Heating mode | Heat conducting oil | Heating furnace |
| Hydrogen compressor | Is provided with | Is free of |
| Hydrogen storage tank | Is provided with | Is free of |
| Consumption of |
3 degree/kg hydrogen | |
| Heat recovery | 70％ | |
| Methanol consumption | 500 to 760 g | Less than or equal to 320 g/standard square hydrogen |
| Pure water | More than or equal to 600 g/standard square hydrogen | |
| Molar ratio of water to alcohol | ≥3 | |
| Production cost | <2 yuan/standard prescription |
The invention relates to a hydrogen production method based on the methanol skid-mounted hydrogen production machine, which comprises the following steps: metering methanol (with purity of 99.9%) and deionized water according to the percentage of 35% by weight of the methanol and 65% by weight of the deionized water by a metering tank 2, stirring and mixing the methanol and the deionized water by a blending tank 3, conveying the methanol and the deionized water to a raw material tank 1 by a blending pump 12, conveying the methanol and the deionized water to a heat exchanger 6 by a raw material pump 11, conveying the raw material pump 11 with a pressure of 0.95-1.1 Mpa at a outlet pressure of 0.95-1.1 Mpa to a heating furnace 4 for vaporization and superheating after heat exchange to 105-150 ℃, conveying the heating furnace 4 comprising a convection chamber (vaporization section) and a radiation chamber (superheating section), wherein the vaporization temperature is 180-200 ℃, the superheating temperature is 280-320 ℃, conveying the methanol and the deionized water to a reactor 5, reacting and producing hydrogen at the temperature of 280-320 ℃, conveying the product to 95-120 ℃ by the heat exchanger 6, cooling the product to 25-40 ℃ by a cooler 7, outputting the product to a separator 8, separating and drying the hydrogen gas-liquid mixture with purity of 68-72%, conveying the hydrogen mixture to a pressure swing adsorption device 9, obtaining the purified hydrogen with the purity of 99-99.999%, and then buffering the purified hydrogen by a hydrogen buffer 10 and outputting the hydrogen.
Compared with the traditional methanol hydrogen production process, the hydrogen production method adopts a heating furnace for heating, and reduces energy consumption. Meanwhile, the water consumption is improved from 40% to 65% by adopting a high water-alcohol ratio; correspondingly, the methanol consumption is reduced from more than 60% to 35%.
It should be understood that the above-mentioned embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention, and it will be obvious to those skilled in the art that other variations or modifications may be made on the basis of the above description, and all the embodiments of the present invention are not exhaustive, and all the obvious variations or modifications which are introduced in the technical scheme of the present invention are within the scope of the present invention.
Claims (9)
1. The methanol skid-mounted hydrogen production machine is composed of five skid-mounted bodies, namely a raw material skid, a vaporization overheating reaction skid, a heat exchange cooling separation skid, a pressure swing adsorption skid and an instrument intelligent control skid, wherein the skid-mounted bodies are mutually connected by adopting pipelines; the raw material sledge comprises a raw material tank, a metering tank and a blending tank, and is used for metering, mixing and conveying raw materials; the vaporization overheating reaction sledge comprises a heating furnace and a reactor and is used for vaporization overheating and reaction hydrogen production; the heat exchange cooling separation sledge comprises a heat exchanger, a cooler and a separator and is used for heating raw materials, cooling products and recovering heat; the pressure swing adsorption sledge comprises a pressure swing adsorption device and a hydrogen buffer, wherein the pressure swing adsorption device is used for adsorbing, desorbing and purifying hydrogen, and the hydrogen buffer is used for buffering, stabilizing pressure and outputting hydrogen; the instrument intelligent control sledge is used for controlling the raw material sledge, the vaporization overheating reaction sledge, the heat exchange cooling separation sledge and the pressure swing adsorption sledge.
2. The methanol skid-mounted hydrogen production machine according to claim 1, wherein a raw material pump is connected to the raw material tank, the other end of the raw material pump is connected to the heat exchanger, a blending pump is connected to the blending tank, and the other end of the blending pump is connected to the raw material tank.
3. The methanol skid-mounted hydrogen production machine according to claim 1, wherein the outlet of the heat exchanger is connected with the heating furnace, the outlet of the heating furnace is connected with the reactor, the outlet of the reactor is connected with the heat exchanger, and the heat exchanger is further connected with the cooler.
4. The methanol skid-mounted hydrogen production machine of claim 3, wherein the outlet of the cooler is connected to the separator, and the outlet of the separator is connected to the blending tank.
5. The method for producing hydrogen by using the methanol skid-mounted hydrogen production machine as claimed in any one of claims 1 to 4, which comprises the following steps: the method comprises the steps of metering methanol and deionized water through a metering tank, stirring and mixing the methanol and the deionized water through a blending tank, conveying the mixed gas to a raw material tank through a blending pump, conveying the mixed gas to a heat exchanger through the raw material pump, carrying out heat exchange to 105-150 ℃, conveying the mixed gas to a heating furnace for vaporization and overheating, conveying the heated mixed gas to a reactor, carrying out reaction at the temperature of 280-320 ℃ for hydrogen production, carrying out heat exchange to 95-120 ℃ through the heat exchanger, cooling the product to 25-40 ℃ through a cooler, conveying the cooled product to a separator, carrying out gas-liquid separation and drying to obtain mixed hydrogen, conveying the mixed hydrogen to a pressure swing adsorption device to obtain purified hydrogen, and buffering the purified hydrogen through a hydrogen buffer and outputting the purified hydrogen.
6. The method of producing hydrogen of claim 5 wherein the amount is measured as a percentage of 35% by weight methanol and 65% by weight deionized water.
7. The method for producing hydrogen according to claim 5, wherein the pressure on the outlet of the raw material pump is 0.95 to 1.1 MPa.
8. The hydrogen production method according to claim 5, wherein the vaporization temperature of the heating furnace is 180 to 200 ℃ and the superheating temperature is 280 to 320 ℃.
9. The hydrogen production method according to claim 5, wherein the purity of the hydrogen in the mixed hydrogen is 68-72%, and the purity of the purified hydrogen is 99-99.999%.
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