Hydrogen dryer and drying method

Abstract

The invention relates to the technical field of hydrogen dryers, in particular to a hydrogen dryer and a drying method. According to the hydrogen dryer, the condensation chamber and the drying chamber are arranged in the machine shell, the condensation assembly is installed in the condensation chamber, the drying assembly and the flow guide assembly are installed in the drying chamber, and the vibrator is installed on the flow guide assembly, so that the contact face of hydrogen and a drying agent can be enlarged, and the hydrogen is fully dried; it is ensured that the hydrogen is dry when exhausted from the exhaust pipe, and meanwhile the drying efficiency of the hydrogen can be improved; the drying agent can be circularly dried by arranging the heating assembly, so that the drying efficiency of the drying agent cannot be reduced due to the use frequency of the drying agent, the drying agent is convenient and rapid to replace, the time is saved, the production efficiency is improved, the machine shell ensures no air leakage in the air drying process, the product waste and dangerous accidents are avoided, and meanwhile, the explosion-proof junction box is arranged, so that the production cost is reduced. And the safety is ensured when the heating pipe works.

Description

Technical Field

[0001] The invention relates to the technical field of hydrogen dryers, and in particular to a hydrogen dryer and a drying method. Background Art

[0002] As a clean energy, hydrogen has the advantages of high combustion heat and non-polluting combustion products. It is the most promising energy carrier to replace traditional fossil fuels and will occupy an important position in the future energy structure. Common hydrogen production methods include purification of by-products of the chlor-alkali industry, coal-to-hydrogen, natural gas steam reforming, methanol cracking, water electrolysis, biomass and other renewable energy sources.

[0003] As a new type of energy, hydrogen energy has many sources, that is, hydrogen production and supply methods, but all of them have various problems. The domestic and foreign markets have an urgent need for low-cost hydrogen supply. At present, alkaline water electrolysis is often used to produce hydrogen. However, in the alkaline water electrolysis industry, oxygen is usually not used and is discharged into the atmosphere, and hydrogen is used. However, the hydrogen after the above simple treatment cannot meet the subsequent production requirements due to its high water content. Therefore, the hydrogen needs to be dried.

[0004] A hydrogen dryer is required during the hydrogen drying process. Currently, commonly used hydrogen dryers include water vapor separators, adsorption dryers, replaceable dryers, freeze dryers, etc. Among them, water vapor separators mainly remove liquid water, and have a very poor effect on separating gaseous water, so they work better at low temperatures; adsorption dryers have certain pressure requirements for the equipment, and usually part of the gas is lost in the cycle to restore the dryer; replaceable dryers are generally filled with consumable desiccants such as molecular sieves and pressure swing adsorption silica gel, which consume a lot of consumables; freeze dryers are more sophisticated and consume more power.

[0005] At present, the replaceable dryer used in hydrogen preparation in the field of chemical hydrogen production has a complicated procedure for replacing the desiccant, is prone to leakage during gas transmission, and has low drying efficiency. Summary of the invention

[0006] The purpose of the present invention is to solve at least one of the technical problems existing in the prior art and to provide a hydrogen dryer and a drying method.

[0007] To achieve the above object, the technical solution adopted by the present invention is as follows: a hydrogen dryer, comprising:

[0008] A casing, wherein a condensing chamber and a drying chamber are arranged in the casing, and a connecting pipe for connecting the condensing chamber and the drying chamber is installed between the condensing chamber and the drying chamber; an air inlet pipe, an exhaust pipe, a desiccant feeding pipe, and a drain pipe are connected to the casing, and control valves are installed on the connecting pipe, the air inlet pipe, the exhaust pipe, the desiccant feeding pipe, and the drain pipe, the desiccant feeding pipe is installed on the top of the casing, and the drain pipe is installed on the bottom of the casing;

[0009] A condensation assembly, the condensation assembly being installed in the condensation chamber and used for condensing the gas transmitted to the condensation chamber by the air inlet pipe;

[0010] A drying component installed in the drying chamber to remove moisture from the hydrogen in the drying chamber, the drying component comprising a desiccant, and the desiccant is filled in the drying chamber;

[0011] A heating assembly, the heating assembly is installed in the drying chamber and is located inside the drying chamber, the heating assembly includes a heating tube, an electric heating wire is arranged inside the heating tube, and the heating tube extends from the top of the drying chamber to the bottom of the drying chamber;

[0012] A flow guide component is installed in the drying chamber, and the flow guide component includes a plurality of flow guide plates installed inside the drying chamber, a vibrator is installed on the flow guide plate; and the heating pipe runs through the flow guide plate.

[0013] Furthermore, the air intake pipe includes a first air intake pipe and a second air intake pipe. The first air intake pipe is installed at the bottom left side of the casing, and a hydrogen production device is connected to the first air intake pipe. The second air intake pipe is installed at the top left side of the casing, and a circulating fan is connected to the second air intake pipe.

[0014] Furthermore, the exhaust pipe includes a first exhaust pipe and a second exhaust pipe, the first exhaust pipe is installed on the top of the drying chamber, the second exhaust pipe is installed on the upper side of the condensation chamber, and the second exhaust pipe is connected to an air pump, and the air outlet of the air pump is connected to the second air inlet pipe.

[0015] Furthermore, the condensation component includes a condenser, which is spirally arranged in the condensation chamber; and the condenser is provided with a condensate inlet pipe and a condensate outlet pipe, the condensate outlet pipe is connected to a condensate storage tank, and a liquid pump is installed between the condensate storage tank and the condensate inlet pipe.

[0016] Furthermore, the heating tube is a fin-type electric heating tube; and an explosion-proof junction box is provided at the connection between the casing and the heating tube.

[0017] Furthermore, the guide plate is arranged to be inclined downward.

[0018] Furthermore, temperature measuring probes for detecting the internal temperature of the casing are installed on the top and bottom of the casing.

[0019] Furthermore, a partition is provided between the condensation chamber and the drying chamber, the partition is wedge-shaped, and the connecting pipe is connected to the partition.

[0020] Furthermore, a desiccant discharge port is provided on the side of the casing facing the drying chamber, and the desiccant discharge port corresponds to the wedge-shaped partition.

[0021] A drying method of a hydrogen dryer, using the above-mentioned hydrogen dryer, the drying method is as follows:

[0022] S1. Open the desiccant feeding pipe, close the desiccant discharge port, add desiccant, and the desiccant will fill the entire drying chamber along the guide plate due to gravity;

[0023] S2. Connect the hydrogen production outlet to the first air inlet pipe, condense part of the water in the hydrogen through the condensation component, and the hydrogen flows upward; and open the connecting pipe, through layer-by-layer drying, the water in the hydrogen is absorbed and flows out of the exhaust pipe;

[0024] S3. After the hydrogen is dried, the exhaust pipe, the connecting pipe and the first air inlet pipe are closed. The circulating fan introduces air through the second air inlet pipe, and the heating component is turned on to heat the desiccant to remove water. The gas temperature is heated to 160-180°C and stabilized for 45-50 minutes. After the preset time is reached, the heating component and the circulating fan are turned off, the connecting pipe is turned on, and the hot air flows into the condensation chamber. The air is condensed and dehydrated through the condensation component. At the same time, the condensed gas is circulated back to the drying chamber by turning on the air pump. When the temperature probe measures that the gas temperature in the drying chamber is lower than 55°C, the desiccant dehydration step is completed and the normal hydrogen dehydration step is resumed.

[0025] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0026] 1. The present application provides a condensation chamber and a drying chamber in the casing, installs a condensation component in the condensation chamber, installs a drying component and a flow guide component in the drying chamber, and installs a vibrator on the flow guide component, thereby increasing the contact surface between hydrogen and the desiccant, fully drying the hydrogen, ensuring that the hydrogen is dry when it goes out of the exhaust pipe, and at the same time improving the drying efficiency of the hydrogen.

[0027] 2. The present application arranges a heating component to circulate the drying desiccant, so that the drying efficiency of the desiccant will not be reduced due to the number of times the desiccant is used. The replacement of the desiccant is convenient and quick, which saves time and improves production efficiency. The casing ensures that there is no gas leakage during the gas drying process, avoiding product waste and dangerous accidents. At the same time, it is equipped with an explosion-proof junction box to ensure the safety of the heating tube while it is working. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 Schematic diagram of the structure of the hydrogen dryer in the preferred embodiment of the present invention.

[0029] Figure numerals: 1, casing; 2, condensation chamber; 3, drying chamber; 4, connecting pipe; 5, air inlet pipe; 501, first air inlet pipe; 502, second air inlet pipe; 6, exhaust pipe; 601, first exhaust pipe; 602, second exhaust pipe; 7, desiccant feeding pipe; 8, drain pipe; 9, condensation assembly; 901, condensation pipe; 902, condensate storage tank; 10, drying assembly; 11, heating assembly; 1101, heating pipe; 1102, electric heating wire; 12, guide assembly; 1201, guide plate; 1202, vibrator; 13, circulation fan; 14, air pump; 15, liquid suction pump; 16, partition; 17, desiccant discharge port. DETAILED DESCRIPTION

[0030] The technical solutions in the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0031] Reference Figure 1 As shown, a preferred embodiment of the present invention, a hydrogen dryer, comprises:

[0032] A casing 1, wherein a condensing chamber 2 and a drying chamber 3 are arranged in the casing 1, and a connecting pipe 4 for connecting the condensing chamber 2 and the drying chamber 3 is installed between the condensing chamber 2 and the drying chamber 3; an air inlet pipe 5, an exhaust pipe, an exhaust desiccant feeding pipe 6, a desiccant feeding pipe 7, and a drain pipe 8 are connected to the casing 1, and a control valve is installed on the connecting pipe 4, the air inlet pipe 5, the exhaust pipe 6, the desiccant feeding pipe 7, and the drain pipe 8, and the desiccant feeding pipe 7 is installed on the top of the casing 1, and the drain pipe 8 is installed on the bottom of the casing 1;

[0033] A condensation component 9, the condensation component 9 is installed in the condensation chamber 2 and is used to condense the gas transmitted to the condensation chamber 2 by the intake pipe 5;

[0034] A drying component 10, which is installed in the drying chamber 3 and is used to remove moisture from the hydrogen in the drying chamber 3. The drying component 10 includes a desiccant, which is filled in the drying chamber 3;

[0035] A heating component 11, which is installed in the drying chamber 3 and located inside the drying component 10, and includes a heating tube 1101, in which an electric heating wire 1102 is provided, and the heating tube 1101 extends from the top of the drying chamber 3 to the bottom of the drying chamber 3;

[0036] A flow guide assembly 12, the flow guide assembly 12 is installed in the drying chamber 3, the flow guide assembly 12 comprises a plurality of flow guide plates 1201 installed inside the drying chamber, and a vibrator 1202 is installed on the flow guide plate 1201; and the heating tube 1101 passes through the flow guide plate, so as to increase the contact surface between the hydrogen and the desiccant, fully dry the hydrogen, ensure that the hydrogen is dry when it goes out of the exhaust pipe, and improve the drying efficiency of the hydrogen;

[0037] By setting up the heating component 11, the desiccant can be circulated and dried, so that the drying efficiency of the desiccant will not be reduced due to the number of times the desiccant is used. The replacement of the desiccant is convenient and quick, which saves time and improves production efficiency. The casing ensures that there is no gas leakage during the gas drying process, avoiding product waste and dangerous accidents. At the same time, an explosion-proof junction box is installed to ensure the safety of the heating tube while it is working.

[0038] As a preferred embodiment of the present invention, it may also have the following additional technical features: the air inlet pipe 5 includes a first air inlet pipe 501 and a second air inlet pipe 502, the first air inlet pipe 501 is installed at the bottom of the left side of the housing 1, and the first air inlet pipe 501 is connected to a hydrogen production device; the second air inlet pipe 502 is installed at the top of the left side of the housing 1, and the second air inlet pipe 502 is connected to a circulating fan 13; and the exhaust pipe 6 includes a first exhaust pipe 601 and a second exhaust pipe 602, the first exhaust pipe 601 is installed at the top of the drying chamber 3, the second exhaust pipe 602 is installed at the upper side of the condensing chamber 2, and the second exhaust pipe 602 is connected to an air pump 14, and the air outlet of the air pump 14 is connected to the second air inlet pipe 502. In this way, the hot air can be recycled and the desiccant can be circulated and dried.

[0039] In this embodiment, the condensation assembly 9 includes a condensation tube 901, which is spirally arranged in the condensation chamber 2; and the condensation tube 901 is provided with a condensate inlet pipe and a condensate outlet pipe, and the condensate outlet pipe is connected to a condensate storage tank 902, and a liquid pump 15 is installed between the condensate storage tank 902 and the condensate inlet pipe. In this way, the condensate can be recycled.

[0040] In this embodiment, the heating tube 1101 is a fin-type electric heating tube, which can enhance the drying of the desiccant; and an explosion-proof junction box is provided at the connection between the housing 1 and the heating tube 1101, thereby ensuring the safety of the heating tube while it is working.

[0041] In this embodiment, the guide plate 1201 is arranged to be tilted downward, thereby facilitating the gas flow, accelerating the drying effect of hydrogen, and facilitating the filling of desiccant.

[0042] In this embodiment, temperature measuring probes for detecting the internal temperature of the casing 1 are installed on the top and bottom of the casing 1. This makes it convenient for the staff to observe the temperature information.

[0043] In this embodiment, a partition 16 is provided between the condensing chamber 2 and the drying chamber 3, the partition 16 is wedge-shaped, and the connecting pipe 4 is connected to the partition 16; and a desiccant discharge port 17 is provided on the side of the housing 1 facing the drying chamber, and the desiccant discharge port 17 corresponds to the wedge-shaped partition 16. Thus, it is convenient to discharge the desiccant.

[0044] A drying method of a hydrogen dryer, using the above-mentioned hydrogen dryer, the drying method is as follows:

[0045] S1, open the desiccant feeding pipe 7, close the desiccant discharge port 17, add desiccant, and the desiccant fills the entire drying chamber 3 along the guide plate 1201 due to gravity;

[0046] S2, connect the hydrogen production outlet to the first air inlet pipe 501, condense part of the water in the hydrogen through the condensation component 9, and the hydrogen flows upward; and open the connecting pipe 4, through layer-by-layer drying, the water in the hydrogen is absorbed and flows out of the exhaust pipe 6;

[0047] S3. After the hydrogen is dried, the exhaust pipe 6, the connecting pipe 4 and the first air inlet pipe 501 are closed, the circulating fan 13 introduces air through the second air inlet pipe 502, and the heating component 11 is turned on to heat and remove water from the desiccant. The gas temperature is heated to 160-180°C and stabilized for 45-50 minutes. After the preset time is reached, the heating component 11 and the circulating fan 13 are turned off, the connecting pipe 4 is turned on, and the hot air flows into the condensation chamber 2, and the air is condensed and dehydrated through the condensation component 9. At the same time, the condensed gas is circulated back to the drying chamber 3 by turning on the air pump. When the temperature probe measures that the gas temperature in the drying chamber 3 is lower than 55°C, the desiccant dehydration step is completed, and the normal hydrogen dehydration step is resumed, thereby realizing the cyclic drying of the desiccant, avoiding the desiccant from reducing the drying efficiency due to the number of times the desiccant is used, and replacing the desiccant is convenient and quick, saving time and improving production efficiency.

[0048] When the desiccant is dehydrated for many times, the desiccant will be powdered and broken. At this time, the desiccant discharge port 17 is opened, and the desiccant is discharged along the partition 16 due to gravity. Then, the desiccant feeding pipe 7 is opened and new desiccant is filled.

[0049] Under the premise that no conflict occurs, those skilled in the art may freely combine and superimpose the above-mentioned additional technical features.

[0050] It is to be understood that the present invention is described by some embodiments, and it is known to those skilled in the art that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.

Claims

1. A hydrogen dryer, characterized in that: include: A casing, wherein a condensing chamber and a drying chamber are arranged in the casing, and a connecting pipe for connecting the condensing chamber and the drying chamber is installed between the condensing chamber and the drying chamber; an air inlet pipe, an exhaust pipe, a desiccant feeding pipe, and a drain pipe are connected to the casing, and control valves are installed on the connecting pipe, the air inlet pipe, the exhaust pipe, the desiccant feeding pipe, and the drain pipe, the desiccant feeding pipe is installed on the top of the casing, and the drain pipe is installed on the bottom of the casing; A condensation assembly, the condensation assembly being installed in the condensation chamber and used for condensing the gas transmitted to the condensation chamber by the air inlet pipe; A drying component installed in the drying chamber to remove moisture from the hydrogen in the drying chamber, the drying component comprising a desiccant, and the desiccant is filled in the drying chamber; A heating assembly, the heating assembly is installed in the drying chamber and is located inside the drying chamber, the heating assembly includes a heating tube, an electric heating wire is arranged inside the heating tube, and the heating tube extends from the top of the drying chamber to the bottom of the drying chamber; A flow guide component is installed in the drying chamber, and the flow guide component includes a plurality of flow guide plates installed inside the drying chamber, a vibrator is installed on the flow guide plate; and the heating pipe runs through the flow guide plate.

2. The hydrogen dryer according to claim 1, characterized in that: The air intake pipe includes a first air intake pipe and a second air intake pipe. The first air intake pipe is installed at the bottom left side of the casing, and a hydrogen production device is connected to the first air intake pipe. The second air intake pipe is installed at the top left side of the casing, and a circulating fan is connected to the second air intake pipe.

3. The hydrogen dryer according to claim 2, characterized in that: The exhaust pipe includes a first exhaust pipe and a second exhaust pipe. The first exhaust pipe is installed on the top of the drying chamber, and the second exhaust pipe is installed on the upper side of the condensation chamber. The second exhaust pipe is connected to an air pump, and the air outlet of the air pump is connected to the second air inlet pipe.

4. The hydrogen dryer according to claim 1, characterized in that: The condensation assembly includes a condenser, which is spirally arranged in the condensation chamber; and the condenser is provided with a condensate inlet pipe and a condensate outlet pipe, the condensate outlet pipe is connected to a condensate storage tank, and a liquid pump is installed between the condensate storage tank and the condensate inlet pipe.

5. The hydrogen dryer according to claim 1, characterized in that: The heating tube is a fin-type electric heating tube; and an explosion-proof junction box is provided at the connection between the casing and the heating tube.

6. The hydrogen dryer according to claim 1, characterized in that: The guide plate is arranged obliquely downward.

7. The hydrogen dryer according to claim 1, characterized in that: The top and bottom of the casing are both equipped with temperature measuring probes for detecting the temperature inside the casing.

8. The hydrogen dryer according to claim 1, characterized in that: A partition is arranged between the condensation chamber and the drying chamber, the partition is wedge-shaped, and the connecting pipe is connected to the partition.

9. The hydrogen dryer according to claim 8, characterized in that: A desiccant discharge port is provided on the side of the casing facing the drying chamber, and the desiccant discharge port corresponds to the wedge-shaped partition.

10. A drying method of a hydrogen dryer, characterized in that: Using the hydrogen dryer described in any one of claims 1 to 9, the drying method is as follows: S1. Open the desiccant feeding pipe, close the desiccant discharge port, add desiccant, and the desiccant will fill the entire drying chamber along the guide plate due to gravity; S2. Connect the hydrogen production outlet to the first air inlet pipe, condense part of the water in the hydrogen through the condensation component, and the hydrogen flows upward; and open the connecting pipe, through layer-by-layer drying, the water in the hydrogen is absorbed and flows out of the exhaust pipe; S3. After the hydrogen is dried, the exhaust pipe, the connecting pipe and the first air inlet pipe are closed. The circulating fan introduces air through the second air inlet pipe, and the heating component is turned on to heat the desiccant to remove water. The gas temperature is heated to 160-180°C and stabilized for 45-50 minutes. After the preset time is reached, the heating component and the circulating fan are turned off, the connecting pipe is turned on, and the hot air flows into the condensation chamber. The air is condensed and dehydrated through the condensation component. At the same time, the condensed gas is circulated back to the drying chamber by turning on the air pump. When the temperature probe measures that the gas temperature in the drying chamber is lower than 55°C, the desiccant dehydration step is completed and the normal hydrogen dehydration step is resumed.

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