Gaseous hydrogen and carbon monoxide mixed storage device and application thereof in methanol synthesis

Abstract

The invention relates to a gaseous hydrogen and carbon monoxide mixed storage device and application thereof in methanol synthesis, and relates to the technical field of gas storage. Comprising a carbon monoxide inlet pipeline, a hydrogen inlet pipeline, a mixing storage tank and a discharging pipeline, a first gas inlet and a second gas inlet are formed in the upper portion of the mixing storage tank, the carbon monoxide inlet pipeline is communicated with the first gas inlet, the hydrogen inlet pipeline is communicated with the second gas inlet, and an adjusting plate is arranged in the mixing storage tank. The adjusting plate divides an inner cavity of the mixing storage tank into an upper storage cavity and a lower adjusting cavity, and the discharging pipeline longitudinally penetrates through the adjusting plate to be communicated with the upper storage cavity and is in sealed sliding connection with the bottom wall of the mixing storage tank; the lower adjusting cavity communicates with a ventilation pipeline. Separate storage of hydrogen and carbon monoxide is changed into mixed storage, the number of storage tanks is reduced, the construction and maintenance cost of methanol equipment is reduced, the storage and transportation efficiency and safety of hydrogen energy are improved, and the storage and transportation cost of hydrogen energy is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of gas storage, and in particular to a gaseous hydrogen and carbon monoxide mixed storage device and application thereof in synthesizing methanol. Background Art

[0002] Methanol is a common organic chemical raw material with applications across a wide range of sectors, including chemicals, pharmaceuticals, light industry, textiles, and transportation. The production of methanol from carbon monoxide hydrogenation is a simple process with increasingly mature technology. Essentially, this process stores energy from renewable energy sources in fuel methanol, facilitating its storage and transportation, thereby improving chemical energy utilization. Amid the rapid development and application of green hydrogen from renewable energy sources, the production of "green methanol" using green hydrogen and carbon monoxide, or with biomass to produce syngas, has become a major approach to methanol production. In this "green methanol" process, different storage environments are designed based on the properties and sources of hydrogen and carbon monoxide. The development of mixed hydrogen and carbon monoxide storage devices is particularly suitable for the mixing and storage of two or more gases, namely, green hydrogen produced by renewable energy electrolysis and carbon monoxide produced by carbon dioxide conversion, or with biomass to produce syngas. Hydrogen storage and transportation is a limiting link in the hydrogen energy industry chain. Improving the efficiency and safety of hydrogen storage and transportation, while reducing its costs, are key development priorities for hydrogen storage and transportation technologies.

[0003] Therefore, how to provide a gaseous hydrogen and carbon monoxide mixed storage device and its application in methanol synthesis is a problem that those skilled in the art urgently need to solve. Summary of the Invention

[0004] The technical problem solved by the present invention is to overcome the shortcomings of the existing technology and provide a gaseous hydrogen and carbon monoxide mixed storage device and its application in synthetic methanol. In order to adapt to the production and application of hydrogen from new energy sources, the separate storage of hydrogen and carbon monoxide is changed to mixed storage, which reduces the number of storage tanks and reduces the construction and maintenance costs of synthetic methanol equipment, which is conducive to improving the efficiency and safety of hydrogen energy storage and transportation and reducing the cost of hydrogen energy storage and transportation.

[0005] To achieve the above-mentioned objectives, the present invention provides a mixed storage device for gaseous hydrogen and carbon monoxide, comprising: a carbon monoxide inlet pipe, a hydrogen inlet pipe, a mixed storage tank and a discharge pipe, wherein a first air inlet and a second air inlet are provided on the upper portion of the mixed storage tank, the carbon monoxide inlet pipe is connected to the first air inlet, the hydrogen inlet pipe is connected to the second air inlet, an adjustment plate is provided inside the mixed storage tank, the adjustment plate divides the inner cavity of the mixed storage tank into an upper storage chamber and a lower adjustment chamber, the discharge pipe longitudinally passes through the adjustment plate and is connected to the upper storage chamber, and is sealed and slidably connected to the bottom wall of the mixed storage tank; the lower adjustment chamber is connected to a ventilation pipe.

[0006] Furthermore, the carbon monoxide intake pipe and the hydrogen intake pipe are both provided with regulating ball valves and electromagnetic flowmeters.

[0007] Furthermore, a pressure sensor and a temperature sensor are provided in the upper storage chamber.

[0008] Furthermore, a vacuum pump is provided on the top of the mixing storage tank.

[0009] Furthermore, a accommodating cavity is provided between the outer wall and the inner wall of the mixing storage tank, an air pump is provided in the accommodating cavity, a disturbance disk is provided on the top of the adjustment plate, the input end of the air pump is connected to the top of the upper storage cavity through a pipeline, and the output end of the air pump is connected to the disturbance disk through a pipeline.

[0010] Furthermore, the disturbance disk includes an intake pipe, multiple connecting pipes and multiple annular pipes. The multiple annular pipes are concentrically arranged, and adjacent annular pipes are connected by several connecting pipes. The intake pipe is located at the center of the annular pipes and is connected to the innermost annular pipe through the connecting pipes; multiple connecting pipes and multiple annular pipes are each provided with a plurality of flow disturbance holes.

[0011] Furthermore, it also includes a controller, and the regulating ball valve, electromagnetic flowmeter, pressure sensor, temperature sensor, vacuum pump and air pump are all electrically connected to the controller.

[0012] A gaseous hydrogen and carbon monoxide mixed storage device is used in methanol synthesis, comprising the following steps:

[0013] Step S1, vacuuming the mixing storage tank using a vacuum pump;

[0014] Step S2, adjusting the temperature of the mixing storage tank to 210-350°C;

[0015] Step S3, adjust the intake amount of hydrogen and carbon monoxide by adjusting the ball valve and electromagnetic flowmeter, and at the same time deliver hydrogen and carbon monoxide into the upper storage chamber in a ratio of 2:1 until the pressure in the upper storage chamber reaches 5-8 MPa, and then stop delivering.

[0016] Furthermore, before the mixed gas of hydrogen and carbon monoxide is discharged through the discharge pipe, the air pump is started for 10-20 minutes to allow the hydrogen and carbon monoxide to be evenly mixed.

[0017] The beneficial effects of the present invention are:

[0018] (1) The present invention changes the separate storage of hydrogen and carbon monoxide in the original new energy hydrogen production and methanol synthesis process to mixed storage, which reduces the number of storage tanks and the construction and maintenance costs of the methanol synthesis equipment, thereby improving the efficiency and safety of hydrogen energy storage and transportation and reducing the cost of hydrogen energy storage and transportation;

[0019] (2) The mixed storage method of hydrogen and carbon monoxide in the present invention improves the stability of hydrogen storage and reduces the proportion of hydrogen in the storage tank, thereby avoiding hydrogen embrittlement when hydrogen is stored in conventional gas tanks and reducing the material requirements of pure hydrogen storage tanks;

[0020] (3) The present invention effectively ensures the purity of the mixed gas by first evacuating the chamber and then introducing hydrogen and carbon monoxide at the same time. By setting an adjustment plate, the upper storage chamber can be gradually expanded to complete the mixed storage of hydrogen and carbon monoxide at a set pressure, thereby accurately completing the mixed storage of hydrogen and carbon monoxide in proportion.

[0021] (4) The present invention provides a disturbance disk to stir the hydrogen and carbon monoxide in the mixed storage tank, thereby preventing the hydrogen and carbon monoxide from being stratified due to long-term storage in the mixed storage tank, and making the output of the mixed gas more uniform. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic diagram of the overall structure provided by the present invention;

[0023] Figure 2 Schematic diagram of the structure of the disturbance disk of the present invention.

[0024] In the figure: 1-carbon monoxide inlet pipe; 2-hydrogen inlet pipe; 3-mixing storage tank; 4-discharge pipe; 5-adjusting plate; 6-upper storage chamber; 7-lower adjusting chamber; 8-ventilation pipe; 9-adjusting ball valve; 10-electromagnetic flowmeter; 11-pressure sensor; 12-temperature sensor; 13-vacuum pump; 14-air pump; 15-disturbance disk; 16-inlet pipe; 17-connecting pipe; 18-annular pipe; 19-disturbance hole; 20-controller. DETAILED DESCRIPTION

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0026] See also Figure 1-2The present invention discloses a mixed storage device for gaseous hydrogen and carbon monoxide, comprising: a carbon monoxide inlet pipe 1, a hydrogen inlet pipe 2, a mixed storage tank 3 and a discharge pipe 4, wherein a first air inlet and a second air inlet are provided on the upper part of the mixed storage tank 3, the carbon monoxide inlet pipe 1 is communicated with the first air inlet, and the hydrogen inlet pipe 2 is communicated with the second air inlet, an adjusting plate 5 is provided inside the mixed storage tank 3, the adjusting plate 5 divides the inner cavity of the mixed storage tank 3 into an upper storage chamber 6 and a lower adjusting chamber 7, the discharge pipe 4 longitudinally penetrates the adjusting plate 5 and is communicated with the upper storage chamber 6, and is sealed and slidably connected to the bottom wall of the mixed storage tank 3; the lower adjusting chamber 7 is communicated with a ventilation pipe 8, and the ventilation pipe 8 can be connected to equipment such as an air compressor to facilitate the introduction of a certain amount of pressurized gas into the lower adjusting chamber 7; solenoid valves are provided on both the discharge pipe 4 and the ventilation pipe 8. The regulating plate 5 is sealed and slidably connected to the inner wall of the mixing storage tank 3. During the process of introducing hydrogen and carbon monoxide into the mixing storage tank 3, as the amount of introduction increases, the space of the upper storage chamber 6 gradually increases from small to large, which is conducive to the uniform mixing of hydrogen and carbon monoxide.

[0027] To further optimize the technical solution, the carbon monoxide intake pipe 1 and the hydrogen intake pipe 2 are both provided with an adjusting ball valve 9 and an electromagnetic flowmeter 10. By adjusting the ball valve 9 and the electromagnetic flowmeter 10, the intake amounts of carbon monoxide and hydrogen can be accurately adjusted, thereby facilitating accurate control of the mixing ratio of hydrogen and carbon monoxide.

[0028] To further optimize the technical solution, a pressure sensor 11 and a temperature sensor 12 are provided in the upper storage chamber 6. The pressure and temperature in the upper storage chamber 6 can be monitored in real time by the pressure sensor 11 and the temperature sensor 12, so as to facilitate the mixed storage of hydrogen and carbon monoxide.

[0029] To further optimize the technical solution, a vacuum pump 13 is provided on the top of the mixed storage tank 3. Before hydrogen and carbon monoxide are introduced, the mixed storage tank 3 can be vacuumed to prevent other gases from affecting the purity of the mixed gas.

[0030] To further optimize the technical solution, a receiving chamber is provided between the outer and inner walls of the mixing and storage tank 3. An air pump 14 is installed in the receiving chamber. A disturbance disk 15 is provided on top of the regulating plate 5. The input end of the air pump 14 is connected to the top of the upper storage chamber 6 via a pipeline, and the output end of the air pump 14 is also connected to the disturbance disk 15 via a pipeline. The air pump 14 can pump the lighter gas in the upper portion into the disturbance disk 15 and then release it, forming a disturbed airflow in the mixing tank, which is conducive to the thorough and uniform mixing of hydrogen and carbon monoxide.

[0031] To further optimize the technical solution, the disturbance disk 15 includes an intake pipe 16, multiple connecting pipes 17, and multiple annular pipes 18. The multiple annular pipes 18 are concentrically arranged, and adjacent annular pipes 18 are connected by several connecting pipes 17. The intake pipe 16 is located at the center of the annular pipes 18 and is connected to the innermost annular pipe 18 through the connecting pipes 17. Multiple connecting pipes 17 and multiple annular pipes 18 are each provided with a plurality of flow disturbance holes 19. The annular pipes 18 are provided with a plurality of flow disturbance holes 19 with a diameter of 3 to 8 mm at intervals of 5 to 15 cm. The flow disturbance gas is scattered from the inner annular pipe to the outer annular pipe, ensuring a good flow disturbance effect, thereby further improving the mixing uniformity of hydrogen and carbon monoxide. The multiple connecting pipes 17 and multiple annular pipes 18 are symmetrically connected in the horizontal and vertical directions and are staggered to balance the gas volume distribution and pipe pressure and resistance inside the disturbance disk 15.

[0032] The present invention further includes a controller 20 , and the regulating ball valve 9 , electromagnetic flowmeter 10 , pressure sensor 11 , temperature sensor 12 , vacuum pump 13 and air pump 14 are all electrically connected to the controller 20 , thereby realizing automatic and intelligent control.

[0033] To further optimize the technical solution, mixing storage tank 3 should be equipped with a flame arrester or explosion-proof membrane to prevent the mixed gas from deflagration due to static electricity or high temperature. The gas pump and other electrical equipment must meet explosion-proof level requirements (such as Ex dIIC T4) to avoid ignition sources.

[0034] To further optimize the technical solution, the welds and flange interfaces of the mixed storage tank 3 are sealed with highly sealing materials (such as metal spiral wound gaskets), and a gas leakage monitoring and alarm device is installed to detect the H2 and CO concentrations in real time and to activate the emergency shut-off system.

[0035] To further optimize the technical solution, the mixing and storage tank 3 should be made of materials resistant to hydrogen embrittlement and CO corrosion (such as 316L stainless steel or nickel-based alloys) to avoid structural failure due to long-term contact. The surface of the stirring blade can be sprayed with a tungsten carbide coating to reduce wear and chemical corrosion.

[0036] The present invention also provides an application of a gaseous hydrogen and carbon monoxide mixed storage device in methanol synthesis, comprising the following steps:

[0037] Step S1, vacuuming the mixing storage tank using a vacuum pump;

[0038] Step S2, adjusting the temperature of the mixing storage tank to 210-350°C;

[0039] Step S3, adjust the intake amount of hydrogen and carbon monoxide by adjusting the ball valve and electromagnetic flowmeter, and at the same time deliver hydrogen and carbon monoxide into the upper storage chamber in a ratio of 2:1 until the pressure in the upper storage chamber reaches 5-8 MPa, and then stop delivering.

[0040] To further optimize the technical solution, before discharging the hydrogen and carbon monoxide mixed gas through the discharge pipe, start the air pump for 10-20 minutes to ensure that the hydrogen and carbon monoxide are evenly mixed.

[0041] The present invention changes the original separate storage of hydrogen and carbon monoxide in the synthetic methanol process to mixed storage, thereby reducing the number of storage tanks and the construction and maintenance costs of the synthetic methanol equipment, which is beneficial to improving the efficiency and safety of hydrogen energy storage and transportation and reducing the cost of hydrogen energy storage and transportation; the mixed storage method of hydrogen and carbon monoxide of the present invention improves the stability of hydrogen storage, reduces the proportion of hydrogen in the storage tank, avoids hydrogen embrittlement when hydrogen is stored in a conventional gas storage tank, and reduces the material requirements of the pure hydrogen storage tank; the present invention effectively ensures the purity of the mixed gas by first evacuating the vacuum and then introducing hydrogen and carbon monoxide at the same time, and by arranging an adjustment plate, the upper storage chamber can be gradually expanded to complete the mixed storage of hydrogen and carbon monoxide at a set pressure, so that the mixed storage of hydrogen and carbon monoxide can be completed accurately according to the proportion; the present invention can disturb and stir the hydrogen and carbon monoxide in the mixed storage tank by arranging a disturbance disk, thereby avoiding stratification of hydrogen and carbon monoxide due to long-term storage in the mixed storage tank, and making the output of the mixed gas more uniform.

[0042] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. Reference can be made to the common and similar parts between the various embodiments. For the devices disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple, and the relevant parts can be referred to the method description.

[0043] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A gaseous hydrogen and carbon monoxide mixed storage device, characterized in that: include: A carbon monoxide inlet pipe, a hydrogen inlet pipe, a mixing storage tank and a discharge pipe, wherein a first air inlet and a second air inlet are provided on the upper part of the mixing storage tank, the carbon monoxide inlet pipe is connected to the first air inlet, the hydrogen inlet pipe is connected to the second air inlet, an adjustment plate is provided inside the mixing storage tank, the adjustment plate divides the inner cavity of the mixing storage tank into an upper storage cavity and a lower adjustment cavity, the discharge pipe longitudinally passes through the adjustment plate and is connected to the upper storage cavity, and is sealed and slidably connected to the bottom wall of the mixing storage tank; the lower adjustment cavity is connected to a ventilation pipe.

2. A gaseous hydrogen and carbon monoxide mixed storage device according to claim 1, characterized in that: The carbon monoxide inlet pipeline and the hydrogen inlet pipeline are both provided with regulating ball valves and electromagnetic flow meters.

3. A gaseous hydrogen and carbon monoxide mixed storage device according to claim 2, characterized in that: A pressure sensor and a temperature sensor are arranged in the upper storage chamber.

4. A gaseous hydrogen and carbon monoxide mixed storage device according to claim 3, characterized in that: A vacuum pump is provided on the top of the mixing storage tank.

5. A gaseous hydrogen and carbon monoxide mixed storage device according to claim 4, characterized in that: An accommodating cavity is provided between the outer wall and the inner wall of the mixing storage tank, an air pump is provided in the accommodating cavity, a disturbance disk is provided on the top of the regulating plate, the input end of the air pump is connected to the top of the upper storage cavity through a pipeline, and the output end of the air pump is connected to the disturbance disk through a pipeline.

6. A gaseous hydrogen and carbon monoxide mixed storage device according to claim 5, characterized in that: The disturbance disk includes an intake pipe, multiple connecting pipes and multiple annular pipes. The multiple annular pipes are concentrically arranged, and adjacent annular pipes are connected by several connecting pipes. The intake pipe is located at the center of the annular pipes and is connected to the innermost annular pipe through the connecting pipes. Multiple connecting pipes and multiple annular pipes are each provided with a plurality of flow disturbance holes.

7. The gaseous hydrogen and carbon monoxide mixed storage device according to claim 5, characterized in that: It also includes a controller, and the regulating ball valve, electromagnetic flowmeter, pressure sensor, temperature sensor, vacuum pump and air pump are all electrically connected to the controller.

8. Use of a gaseous hydrogen and carbon monoxide mixed storage device in methanol synthesis according to any one of claims 1 to 7, characterized in that: The following steps are involved: Step S1, vacuuming the mixing storage tank using a vacuum pump; Step S2, adjusting the temperature of the mixing storage tank to 210-350°C; Step S3, adjust the intake amount of hydrogen and carbon monoxide by adjusting the ball valve and electromagnetic flowmeter, and at the same time deliver hydrogen and carbon monoxide into the upper storage chamber in a ratio of 2:1 until the pressure in the upper storage chamber reaches 5-8 MPa, and then stop delivering.

9. Application of a gaseous hydrogen and carbon monoxide mixed storage device in methanol synthesis according to claim 8, characterized in that: Before discharging the hydrogen and carbon monoxide mixed gas through the discharge pipe, start the air pump for 10-20 minutes to ensure that the hydrogen and carbon monoxide are evenly mixed.

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