CN217972601U - Novel hydrogen purification system - Google Patents
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- CN217972601U CN217972601U CN202222089192.0U CN202222089192U CN217972601U CN 217972601 U CN217972601 U CN 217972601U CN 202222089192 U CN202222089192 U CN 202222089192U CN 217972601 U CN217972601 U CN 217972601U
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Abstract
The present disclosure provides a novel hydrogen purification system, which comprises a feed gas deoxidation process channel and a regeneration gas drying process channel; the raw material gas deoxidation process channel is distributed with a raw material hydrogen pre-heater, a deoxygenator and a hydrogen pre-cooler which are communicated in sequence; the regenerated gas drying process channel is distributed with a regenerated gas heater, a drier group, a hydrogen cooler and a separator group which are communicated in sequence; the dryer group comprises a first dryer, a second dryer and a third dryer; the separator group comprises a first hydrogen separator, a second hydrogen separator and a third hydrogen separator; the first dryer, the second dryer and the third dryer are respectively communicated with the regenerated gas heater and the hydrogen cooler through the respective two ends; the hydrogen pre-cooler is respectively communicated with the first hydrogen separator, the second hydrogen separator and the third hydrogen separator; the embodiment of the disclosure reduces the number of devices and the equipment investment, improves the utilization efficiency of the devices, and reduces the consumption of chilled water and electric energy.
Description
Technical Field
The invention belongs to the technical field of emerging green environmental protection such as water electrolysis hydrogen gas and hydrogen for fuel cells, and particularly relates to a novel hydrogen purification system.
Background
At present, hydrogen energy utilization is regarded as a sustainable energy utilization path parallel to clean low-carbon utilization of fossil fuels and large-scale utilization of renewable energy, the role value of hydrogen energy in the energy transformation process is increasingly prominent, and the interconnection and interaction of fossil energy, new energy and a hydrogen-electricity secondary energy network become a long-term application scene. The international commission on Hydrogen energy (The Hydrogen Council) considers: the hydrogen energy is utilized on a large scale from 2030 in the world, the hydrogen energy is used for bearing 18% of the global terminal energy consumption in 2040, and the hydrogen energy utilization can contribute 20% of the global carbon dioxide emission reduction amount in 2050.
At present, the industrial hydrogen production method has more than one clock, and comprises the hydrogen production by natural gas steam reforming, the hydrogen production by methanol reforming, the hydrogen production by water gas and the hydrogen production by water electrolysis. The raw material water for hydrogen production by water electrolysis is inexhaustible, the reaction product after energy use is water, and meanwhile, the electric energy of the electrolyzed water can pass through environment-friendly energy sources such as wind energy, solar energy and nuclear energy, so that the hydrogen production by water electrolysis has good social benefit and economic benefit.
As is well known, hydrogen prepared by a general hydrogen production process cannot meet the subsequent production requirements due to low purity and excessive moisture content. Therefore, in order to remove impurities in the hydrogen gas, it is generally necessary to introduce a purification device. The purification apparatus generally includes a deoxygenation column for removing a trace amount of oxygen contained in the hydrogen gas and a drying column for removing moisture contained in the hydrogen gas and a corresponding cooler. In order to make the purification device continuously and stably operate, the prior art also adopts a non-pressure regeneration method, namely, two drying towers have different working pressures, one drying tower dries gas under the system pressure, and the other drying tower regenerates under the normal pressure. The two-tower process and the three-tower process can be divided according to different numbers of drying towers.
At present, the deoxygenator and the dryer of the purification process are integrated by electric heating and adsorbent or desiccant, which not only causes the reduction of the utilization rate of electric heaters of three dryers and the waste of investment, but also causes the processing difficulty of the dryers and the heaters, uneven bed distribution and poor purification effect. In addition, the current three-tower process is provided with three hydrogen coolers, but only an electric heater and one cooler are operated at each stage, which causes the efficiency of equipment utilization to be reduced, the investment to be increased, and a large amount of consumption of chilled water and electric energy to be caused.
Disclosure of Invention
In view of the above problems in the prior art, the present invention provides a novel hydrogen purification system that requires only a small amount of equipment, is highly efficient, energy-saving, safe, and reliable.
In order to achieve the purpose, the embodiment of the invention adopts the technical scheme that:
in one aspect, a novel hydrogen purification system is provided, comprising: a raw material gas deoxidation process channel and a regeneration gas drying process channel; the raw material gas deoxidation process channel and the regeneration gas drying process channel are communicated at one corresponding end; the raw material gas deoxidation process channels are distributed and communicated in sequence: a raw material hydrogen preheater, a deoxygenator and a hydrogen precooler; the regenerated gas drying process channels are distributed and communicated in sequence: the device comprises a regeneration gas heater, a dryer group, a hydrogen cooler and a separator group; wherein, the desicator group includes three desicators, is respectively: a first dryer, a second dryer, and a third dryer; the separator group comprises three hydrogen separators which are respectively: the first hydrogen separator, the second hydrogen separator and the third hydrogen separator; the first dryer, the second dryer and the third dryer are respectively communicated with the regeneration gas heater and the hydrogen cooler through two ends of each dryer; the hydrogen precooler is respectively communicated with the first hydrogen separator, the second hydrogen separator and the third hydrogen separator.
In some embodiments of the invention, the dryer comprises, in order from top to bottom: an upper distributor, an upper packed region, a catalytic region, a lower packed region and a lower distributor; wherein, the catalytic zone is used for producing water by hydrogen and oxygen under the action of a catalyst; the upper filling area and the lower filling area are used for filling a filtering structure; the upper distributor is provided with an upper opening; the lower distributor is provided with a lower opening.
In some embodiments of the invention, the filter structure comprises ceramic balls of a predetermined particle size, a wire mesh, and a grid.
In some embodiments of the invention, the deoxygenator comprises, in order from top to bottom: an upper distributor for deoxygenation, an upper packed zone for packed filtration, a catalytic zone for production of water, a lower packed zone for packed filtration, and a lower distributor for deoxygenation; the upper distributor for deoxidation is provided with an upper opening; the lower distributor for deoxidation is provided with a lower opening.
In some embodiments of the invention, the hydrogen separator is provided as a gravity separator or a wire mesh separator.
In some embodiments of the invention, the hydrogen separator comprises a gas-liquid inlet on the side of the furnace shell, a hydrogen outlet on the top of the furnace shell and a condensate outlet on the bottom of the furnace shell.
In some embodiments of the invention, the hydrogen pre-cooler, the hydrogen cooler are configured as shell and tube heat exchangers.
In some embodiments of the invention, the feed hydrogen preheater is provided as a heat exchanger or an electric heater.
In some embodiments of the invention, the regeneration gas heater employs any one of the following heat sources: high-temperature flue gas, steam and electricity.
In another aspect, the present invention further provides a hydrogen purification process method, which is used in the novel hydrogen purification system, and according to the corresponding states of the first dryer, the second dryer and the third dryer, the following hydrogen purification methods are adopted:
in the case of state one, the process comprises: the first dryer is in an adsorption state, the second dryer is in a drying state, and the third dryer is in a regeneration state; judging the regeneration result of the third dryer after the heating time of the third dryer reaches the preset time, and when the judgment result is yes, performing cold blowing on the third dryer to finish the current state;
in the case of state two, the process comprises: the first dryer is in a dry state, the second dryer is in a regeneration state, and the third dryer is in an adsorption state; judging the regeneration result of the second dryer after the heating time of the second dryer reaches the preset time, and when the judgment result is yes, performing cold blowing on the second dryer to finish the current state;
in the case of state three, the process comprises: the first dryer is in a regeneration state, the second dryer is in an adsorption state, and the third dryer is in a drying state; and judging the regeneration result of the first dryer after the heating time of the first dryer reaches the preset time, and when the judgment result is yes, performing cold blowing on the first dryer to finish the current state.
Compared with the prior art, the invention has the beneficial effects that:
the method can purify the crude hydrogen generated by electrolysis after wind power generation and photovoltaic power generation to the purified hydrogen meeting the standard of hydrogen products for fuel cells, thereby realizing the purpose of providing green, low-carbon, environment-friendly and cheap fuel for emerging industries such as fuel cell automobiles and the like.
The regenerated gas heater and the hydrogen cooler are arranged to replace three electric heaters and three hydrogen coolers of the original three-tower process, so that the number of equipment is reduced, the equipment investment is improved, the equipment utilization efficiency is improved, and the consumption of resources such as chilled water and electric energy is reduced.
Drawings
To more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings of the embodiments will be briefly introduced below, and it is apparent that the drawings in the following description relate only to some embodiments of the present disclosure and are not limiting to the present disclosure.
FIG. 1 is a schematic diagram of a novel hydrogen purification system according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of the dryer of the novel hydrogen purification system of an embodiment of the present invention;
fig. 3 is a flow chart of a process for hydrogen purification according to an embodiment of the present invention.
Description of the reference numerals
1-an upper distributor; 2-upper filling area; 3-an adsorption zone; 4-lower fill area;
5-a lower distributor;
a-an upper opening;
b-lower opening
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present disclosure more clear, the technical solutions of the embodiments of the present disclosure will be described below clearly and completely with reference to the accompanying drawings of the embodiments of the present disclosure. It is to be understood that the described embodiments are only a few embodiments of the present disclosure, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the disclosure without any inventive step, are within the scope of protection of the disclosure.
Unless otherwise defined, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
The purpose of providing green, low-carbon, environment-friendly and cheap fuel for emerging industries such as fuel cell automobiles and the like is achieved by purifying crude hydrogen generated by electrolysis after wind power generation and photovoltaic power generation to purified hydrogen meeting the standard of hydrogen products for fuel cells. The present invention provides the following solutions:
in one aspect, a novel hydrogen purification system is provided, see fig. 1, comprising: a raw material gas deoxidation process channel and a regeneration gas drying process channel; the raw material gas deoxidation process channel and the regeneration gas drying process channel are communicated at one corresponding end; the raw material gas deoxidation process channels are distributed and communicated in sequence: a raw material hydrogen preheater, a deoxygenator and a hydrogen precooler; the regenerated gas drying process channels are distributed and communicated in sequence: the device comprises a regeneration gas heater, a dryer group, a hydrogen cooler and a separator group; wherein, the desicator group includes three desicators, is respectively: a first dryer, a second dryer, and a third dryer; the separator group includes three hydrogen separators, and its effect is to separate condensate water and hydrogen, and in this embodiment, three hydrogen separators are respectively: the first hydrogen separator, the second hydrogen separator and the third hydrogen separator; the first dryer, the second dryer and the third dryer are respectively communicated with the regeneration gas heater and the hydrogen cooler through the respective two ends; the hydrogen precooler is respectively communicated with the first hydrogen separator, the second hydrogen separator and the third hydrogen separator.
Further, the hydrogen separator is provided as a gravity separator or a wire separator.
Further, the hydrogen separator comprises a gas-liquid inlet positioned on the side surface of the furnace shell, a hydrogen outlet positioned on the top of the furnace shell and a condensate outlet positioned on the bottom of the furnace shell.
In this embodiment, the hydrogen pre-cooler is in communication with the gas-liquid inlet of the hydrogen separator. In actual operation: generally 10000Nm3/h of raw material hydrogen (electrolyzed crude hydrogen) is heated to 100 ℃ by the raw material hydrogen heater, enters the deoxygenator to perform deoxygenation reaction, then enters a tube pass of the hydrogen pre-cooler, exchanges heat with 60t/h of chilled water in a shell pass of the hydrogen pre-cooler, is cooled to 15 ℃, and then enters one of the first hydrogen separator, the second hydrogen separator and the third hydrogen separator according to the specific conditions of the respective corresponding states of the first dryer, the second dryer and the third dryer, wherein the specific entering mode is explained in the description of the process procedure later. In addition, it should be noted that the hydrogen outlet of the hydrogen separator plays different roles at different stages, and may be used as both the outlet and the inlet of hydrogen, and the hydrogen outlet is named here for convenience of description. The function of this hydrogen outlet in the overall hydrogen purification will also be described later in connection with the process.
Through the novel hydrogen purification system of above-mentioned embodiment, can replace the three tower processes commonly used among the prior art, improve equipment utilization efficiency, reduce equipment investment, avoid causing the large amount of consumptions of refrigerated water and electric energy.
Further, the hydrogen precooler and the hydrogen cooler are configured as shell-and-tube heat exchangers. For example, in this embodiment, chilled water is introduced into the shell side of the hydrogen pre-cooler, and deoxygenated high-temperature hydrogen is introduced into the tube side. And the reacted high-temperature hydrogen enters a tube pass of a hydrogen pre-cooler to exchange heat with chilled water of a shell pass for cooling. The hydrogen in the tube pass is high-temperature hydrogen, water vapor in the hydrogen is condensed into condensed water while the hydrogen is cooled, and the condensed water enters the first hydrogen separator, the second hydrogen separator or the third hydrogen separator along with the hydrogen according to different current process stages (such as time sequence). In this embodiment, hydrogen is separated from the condensed water, and the separated condensed water is discharged at the bottom of the hydrogen cooler.
Furthermore, the raw material hydrogen preheater is set as a heat exchanger or an electric heater and mainly used for preheating the crude hydrogen to reach the reaction temperature of catalytic deoxidation.
Further, the regeneration gas heater adopts any one of the following heat sources: high-temperature flue gas, steam and electricity. The regenerated gas heater can adopt different heat sources such as high-temperature flue gas, steam, electricity and the like according to scale and field conditions, and has wider adaptability.
In the embodiment, only one regeneration gas heater and one hydrogen cooler are arranged, so that the number of equipment is reduced, the equipment investment is correspondingly reduced, the utilization efficiency of the equipment is improved, and the consumption of resources such as chilled water, electric energy and the like is reduced.
In addition, the heating of the deoxygenator and the heating of the dryer are separated, and the deoxygenation part and the drying part are separated, so that the equipment design and processing difficulty of the deoxygenator and the dryer are reduced, the uniformity of equipment bed layer distribution is improved, and the deoxygenation and drying effects are improved.
In one embodiment, referring to fig. 2, the dryer comprises, in sequence from top to bottom: an upper distributor 1, an upper filling area 2, an adsorption area 3, a lower filling area 4 and a lower distributor 5; wherein, the adsorption zone 3 is used for producing water by hydrogen and oxygen under the action of a catalyst; the upper filling area 2 and the lower filling area 4 are used for filling a filter structure, and the filter structure comprises ceramic balls with preset particle sizes, a wire mesh and a grid; the upper distributor 1 is provided with an upper opening A; the lower distributor 5 is provided with a lower opening B. In this example, the adsorption zone 3 or adsorption zone is the main reaction zone for dry dehydration. The upper filling area 2 and the lower filling area 4 are filled with materials such as ceramic balls with certain particle sizes, and the materials are mainly used for preventing the catalyst from being blown out of the dryer due to the fact that the gas speed of the purified hydrogen is too high. The upper distributor 1 and the lower distributor 2 mainly make gas uniformly distributed through drying, and the reduction of drying effect caused by gas short circuit and the like is avoided.
In one embodiment, the deoxygenator (not shown) comprises, in order from top to bottom: an upper distributor for deoxygenation, an upper packed zone for packed filtration, a catalytic zone for production of water, a lower packed zone for packed filtration, and a lower distributor for deoxygenation; the upper distributor for deoxidation is provided with an upper opening; the lower distributor for deoxidation is provided with a lower opening. The oxygen remover can remove trace oxygen in raw material hydrogen (electrolytic crude hydrogen). The raw material hydrogen is heated to about 100 ℃ by a central electric heater of a raw material hydrogen heater, and after entering a deoxygenator, a trace amount of oxygen reacts with the hydrogen to generate water under the action of a catalyst in the deoxygenator. Thereby, the deoxidation function is exerted. In addition, in this example, the catalytic zone for water production is the primary reaction zone for catalytic deoxygenation. The upper filling area for filling and filtering and the lower filling area for filling and filtering are filled with substances such as ceramic balls with certain particle sizes, and the like, so that the phenomenon that the catalyst is blown out of the deoxygenator due to the fact that the gas speed of deoxygenated hydrogen is too high is mainly prevented. The upper distributor for deoxidation and the lower distributor for deoxidation are mainly used for uniformly distributing gas in the deoxidation process, so that the reduction of the deoxidation effect caused by gas short circuit and the like is avoided.
In this embodiment, it should be added that the dryer and the deoxygenator are substantially the same in comparison with the overall structure. The two are different in the respective positions in the hydrogen purification process, and exert different functions correspondingly. For example, on a feed gas deoxygenation process channel, feed hydrogen is unidirectionally flowed through the deoxygenator; on the contrary, in the regeneration gas drying process channel, hydrogen gas needs to enter or flow out from the upper opening A or the lower opening B of the dryer at different stages in the continuous purification and regeneration process, and the flowing direction of the hydrogen gas in the dryer can be understood as being bidirectional. The continuous purification and regeneration process of hydrogen will be described in connection with the final process.
In another aspect, the present invention further provides a hydrogen purification process, referring to fig. 3, which is applied to the novel hydrogen purification system, and according to the corresponding states of the first dryer, the second dryer and the third dryer, the following hydrogen purification processes are adopted:
in the case of state one, the process comprises: the first dryer is in an adsorption state, the second dryer is in a drying state, and the third dryer is in a regeneration state; judging the regeneration result of the third dryer after the heating time of the third dryer reaches the preset time, and when the judgment result is yes, performing cold blowing on the third dryer to finish the current state;
in the case of state two, the process comprises: the first dryer is in a dry state, the second dryer is in a regeneration state, and the third dryer is in an adsorption state; judging the regeneration result of the second dryer after the heating time of the second dryer reaches the preset time, and when the judgment result is yes, performing cold blowing on the second dryer to finish the current state;
in the case of state three, the process comprises: the first dryer is in a regeneration state, the second dryer is in an adsorption state, and the third dryer is in a drying state; and judging the regeneration result of the first dryer after the heating time of the first dryer reaches the preset time, and when the judgment result is yes, performing cold blowing on the first dryer to finish the current state.
It can be seen from the above description of the process method that each drying tower respectively goes through three stages of adsorption, regeneration and drying, thereby realizing continuous purification and regeneration of hydrogen, and meanwhile, part of heat of the regenerated hydrogen is recovered by a hydrogen cooler, and the regenerated hydrogen accounts for about 10% -20% of the purified hydrogen.
In order to further understand the structural features of the novel hydrogen purification system and the process applied to the novel hydrogen purification system, a brief description is now made of the complete process of hydrogen purification.
And after the raw material hydrogen is deoxidized, forming high-temperature hydrogen, and after the raw material hydrogen is cooled by a hydrogen precooler, entering a corresponding one of a first hydrogen separator, a second hydrogen separator and a third hydrogen separator by adopting a corresponding hydrogen purification method based on the respective corresponding states of the first dryer, the second dryer and the third dryer, and starting a hydrogen purification process.
Since each of the first dryer, the second dryer and the third dryer respectively goes through one of three stages of adsorption, regeneration and drying in the same process, continuous purification and regeneration of hydrogen are finally realized. The specific process comprises the following steps:
when the first dryer is in an adsorption state, the second dryer is in a drying state and the third dryer is in a regeneration state, hydrogen enters the first hydrogen separator.
Referring to fig. 1, at this point, the valves (K1A, K10A, K9A, K8C, K6C, K5C, K4C, K3C, K2B, K10B, K9B, K7B) are open; after the hydrogen is separated in the first hydrogen separator, the water vapor contained in the hydrogen flows out from the lower part of the first hydrogen separator in the form of condensate after being condensed; the separated hydrogen flows out from a hydrogen outlet above the first hydrogen separator, enters the first dryer through a lower opening B of the first dryer, flows out from an upper opening A of the first dryer after being adsorbed in the first dryer, continues to flow into a regeneration gas heater, and enters the third dryer from an upper opening A of the third dryer after being heated by the regeneration gas heater, and then is subjected to regeneration treatment; and then, the hydrogen flows out from an opening B below the third dryer, sequentially passes through a hydrogen cooler, a third hydrogen separator and a second hydrogen separator, wherein the hydrogen flows in from a hydrogen outlet of the third hydrogen separator, enters the second dryer for drying treatment, and after the heating time of the third dryer reaches a preset time, the regeneration result of the third dryer is judged, if the judgment result is yes, cold blowing is started to the third dryer, the current state is ended, at the moment, valves (K1A, K10A, K9A, K8A, K8C, K9C, K4C, K3C, K2C, K2B, K10B, K9B and K7B) are opened, and finally, the product hydrogen flows out from the valve K7B and enters a downstream process.
It should be noted that, in the above process, besides the dryer, the separator and the cooler, the process further includes a plurality of valves for controlling and adjusting, and details about the kinds and structures of the valves are not described herein and can be selected according to the process requirements; in addition, in the description of the hydrogen purification process of the present application, any reference to or definition of the current state of the valve is understood to be in the closed state, as follows.
When the first dryer is in a dry state, the second dryer is in a regeneration state and the third dryer is in an adsorption state, hydrogen enters the third hydrogen separator.
Referring to fig. 1, at this time, the valves (K1C, K10C, K9C, K8B, K6B, K5B, K4B, K3B, K2A, K10A, K9A, K7A) are opened; after the hydrogen is separated in the third hydrogen separator, the water vapor contained in the hydrogen flows out from the lower part of the third hydrogen separator in the form of condensate after being condensed; the separated hydrogen flows out from a hydrogen outlet above the third hydrogen separator, enters a third dryer through a lower opening B of the third dryer, flows out from an upper opening A of the third dryer after being adsorbed in the third dryer, continues to flow into a regeneration gas heater, and enters the second dryer from the upper opening A of the second dryer after being heated by the regeneration gas heater, so that the regeneration treatment is carried out; and then, the hydrogen flows out of an opening B below the second dryer, sequentially passes through a hydrogen cooler, a second hydrogen separator and a first hydrogen separator, wherein the hydrogen flows in from a hydrogen outlet of a third hydrogen separator, enters the first dryer for drying treatment, judges the regeneration result of the second dryer after the heating time of the second dryer reaches a preset time, starts to cool and blow the second dryer when the judgment result is yes, ends the current state, opens valves (K1C, K10C, K9C, K8C, K8B, K9B, K4B, K3B, K2B, K2A, K10A, K9A and K7A) at the moment, and finally, the product hydrogen flows out of the valve K7A and enters a downstream process.
When the first dryer is in a regeneration state, the second dryer is in an adsorption state and the third dryer is in a drying state, hydrogen enters the third hydrogen separator.
Referring to fig. 1, at this time, the valves (K1B, K10B, K9B, K8A, K6A, K5A, K4A, K3A, K2C, K10C, K9C, K7C) are opened; after the hydrogen is separated in the second hydrogen separator, the water vapor contained in the hydrogen flows out from the lower part of the second hydrogen separator in the form of condensate after being condensed; the separated hydrogen flows out from a hydrogen outlet above the second hydrogen separator, enters a second dryer through a lower opening B of the second dryer, flows out from an upper opening A of the second dryer after being adsorbed in the second dryer, continues to flow into a regeneration gas heater, and enters the first dryer from the upper opening A of the first dryer after being heated by the regeneration gas heater, and then is subjected to regeneration treatment; and then, the hydrogen flows out of an opening B below the first dryer, sequentially passes through a hydrogen cooler, a first hydrogen separator and a third hydrogen separator, wherein the hydrogen flows in from a hydrogen outlet of the first hydrogen separator, enters the third dryer for drying treatment, judges the regeneration result of the first dryer after the heating time of the first dryer reaches a preset time, starts to cool and blow the first dryer when the judgment result is yes, ends the current state, opens valves (K1B, K10B, K9B, K8B, K8A, K9A, K4A, K3A, K2A, K2C, K10C, K9C and K7C) at the moment, and finally, the product hydrogen flows out of the valve K7C and enters a downstream process.
During the hydrogen flow through the hydrogen cooler, the flow through the hydrogen cooler recovers a portion of the heat of the regenerated hydrogen.
To maintain the following description of the embodiments of the present disclosure clear and concise, a detailed description of known functions and known components have been omitted from the present disclosure.
Moreover, although illustrative embodiments have been described herein, the scope includes any and all embodiments having equivalent elements, modifications, omissions, combinations (e.g., of aspects across various embodiments), adaptations or alterations based on the present disclosure. The elements of the claims are to be interpreted broadly based on the language employed in the claims and not limited to examples described in the specification or during the life of the application. Further, the steps of the disclosed methods may be modified in any manner, including by reordering steps or inserting or deleting steps. It is intended, therefore, that the description be regarded as illustrative only, with a true scope being indicated by the following claims and their full scope of equivalents.
The above description is intended to be illustrative and not restrictive. For example, the above-described examples (or one or more aspects thereof) may be used in combination with each other. Other embodiments may be utilized, for example, by one of ordinary skill in the art, upon reading the above description. Also, in the foregoing detailed description, various features may be combined together to simplify the present disclosure. This should not be interpreted as intending that an unclaimed disclosed feature is essential to any claim. Thus, the following claims are hereby incorporated into the detailed description as examples or embodiments, with each claim standing on its own as a separate embodiment, and it is contemplated that these embodiments may be combined with each other in various combinations or permutations. The scope of the invention should be determined with reference to the appended claims, along with the full scope of equivalents to which such claims are entitled.
Claims (9)
1. A novel hydrogen purification system, characterized in that it comprises: a raw material gas deoxidation process channel and a regeneration gas drying process channel; the raw material gas deoxidation process channel and the regeneration gas drying process channel are communicated at one corresponding end;
the raw material gas deoxidation process channels are distributed and communicated in sequence: a raw material hydrogen preheater, a deoxygenator and a hydrogen precooler;
the regenerated gas drying process channels are distributed and communicated in sequence: the device comprises a regeneration gas heater, a dryer group, a hydrogen cooler and a separator group; wherein, the desicator group includes three desicators, is respectively: a first dryer, a second dryer, and a third dryer; the separator group comprises three hydrogen separators which are respectively: the first hydrogen separator, the second hydrogen separator and the third hydrogen separator;
the first dryer, the second dryer and the third dryer are respectively communicated with the regeneration gas heater and the hydrogen cooler through the respective two ends;
the hydrogen precooler is respectively communicated with the first hydrogen separator, the second hydrogen separator and the third hydrogen separator.
2. A novel hydrogen purification system as claimed in claim 1, wherein the dryer comprises, distributed sequentially from top to bottom: an upper distributor, an upper filling area, a catalytic area, a lower filling area and a lower distributor; wherein the content of the first and second substances,
the catalytic zone is used for producing water by hydrogen and oxygen under the action of a catalyst;
the upper filling area and the lower filling area are used for filling a filtering structure;
the upper distributor is provided with an upper opening;
the lower distributor is provided with a lower opening.
3. A novel hydrogen purification system according to claim 2, characterized in that the filtering structure comprises ceramic balls, wire mesh and grids of preset particle size.
4. A novel hydrogen purification system as claimed in claim 2, wherein the deoxygenator comprises, in order from top to bottom: an upper sparger for deoxygenation, an upper packed zone for packed filtration, a catalytic zone for production of water, a lower packed zone for packed filtration, and a lower sparger for deoxygenation;
the upper distributor for deoxidation is provided with an upper opening;
the lower distributor for deoxidation is provided with a lower opening.
5. The novel hydrogen purification system according to claim 1, wherein the hydrogen separator is provided as a gravity separator or a wire mesh separator.
6. The novel hydrogen purification system according to claim 5, wherein the hydrogen separator comprises a gas-liquid inlet located at the side of the furnace shell, a hydrogen outlet at the top of the furnace shell and a condensate outlet at the bottom of the furnace shell.
7. The novel hydrogen purification system according to claim 1, wherein the hydrogen pre-cooler, the hydrogen cooler are configured as shell-and-tube heat exchangers.
8. The novel hydrogen purification system according to claim 1, wherein the feed hydrogen preheater is provided as a heat exchanger or an electric heater.
9. A novel hydrogen purification system according to claim 1, wherein the regeneration gas heater employs any one of the following heat sources: high-temperature flue gas, steam and electricity.
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