CN217829473U - Small-size high-pressure hydrogen purification drying device - Google Patents
Small-size high-pressure hydrogen purification drying device Download PDFInfo
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- CN217829473U CN217829473U CN202221796766.1U CN202221796766U CN217829473U CN 217829473 U CN217829473 U CN 217829473U CN 202221796766 U CN202221796766 U CN 202221796766U CN 217829473 U CN217829473 U CN 217829473U
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Abstract
The utility model discloses a small high-pressure hydrogen purification and drying device, which belongs to the field of gas separation; the hydrogen inlet is divided into two paths, and the two paths are finally converged to a conventional hydrogen supply port through an air inlet regeneration switching electromagnetic valve, adsorption towers and a check valve group which are connected in sequence, and the two adsorption towers are fixedly arranged on a connecting steel plate; the check valve group comprises a positive blowing check valve group and a back blowing check valve group, and an interface pipeline of the adsorption tower is divided into a positive blowing path and a back blowing path; the positive blowing path is connected with the hydrogen outlet through a positive blowing one-way valve; the back flushing path is connected with the interface of the adsorption tower through a throttle valve and a back flushing check valve in sequence. The utility model discloses a two regeneration switching solenoid valves that admit air control the flow direction in to the adsorption tower, need not the low pressure control gas, avoid additionally disposing parts such as relief pressure valve, reduced the system size.
Description
Technical Field
The utility model belongs to the technical field of gaseous separation, specifically be a small-size high pressure hydrogen purification drying device.
Background
With the rapid development of hydrogen energy, the requirements of various industries on the use pressure, dew point, purity and the like of hydrogen are higher and higher. The purity requirement of the fuel cell on hydrogen is more than or equal to 99.97 percent, the water content is less than or equal to 5 mu mol/mol, and the requirements on other impurities such as sulfur, formaldehyde and the like are higher. At present, most of domestic high-pressure hydrogen purification and drying devices are low-pressure hydrogen purification and drying devices which are generally below 15MPa, have large overall dimensions and are inconvenient to install and maintain.
SUMMERY OF THE UTILITY MODEL
To the problem that exists in the background art, the utility model discloses carry out optimal design on common hydrogen purification drying device's basis, provide a miniaturized high pressure hydrogen purification drying device, adopt high pressure hydrogen to flow through two adsorption towers that are full of the adsorbent in turn, a serial communication port, include: the hydrogen adsorption device comprises adsorption towers, an air inlet regeneration switching electromagnetic valve, a check valve group, a throttle valve, a pressure gauge and a connecting steel plate, wherein a hydrogen inlet is divided into two paths and is finally converged to a conventional hydrogen inlet through the air inlet regeneration switching electromagnetic valve, the adsorption towers and the check valve group which are connected in sequence, and the two adsorption towers are fixedly arranged on the connecting steel plate;
the check valve group comprises a positive blowing check valve group and a back blowing check valve group, and an interface pipeline of the adsorption tower is divided into a positive blowing path and a back blowing path; the forward blowing path is connected with the hydrogen outlet through a forward blowing one-way valve; the back flushing path is connected with the interface of the adsorption tower through a throttle valve and a back flushing check valve in sequence.
And a pressure gauge is arranged on a pipeline between the adsorption tower and the one-way air inlet regeneration switching electromagnetic valve.
The positive blowing paths of the two check valve groups are merged before the throttling valve.
All the check valves in the throttle valve and the two check valve groups are directly screwed into the prefabricated holes of the connecting steel plates.
The air inlet regeneration switching electromagnetic valve is installed on the connecting steel plate through an electromagnetic valve installation base.
The adsorption tower comprises: the device comprises a cylinder, a filter screen, a tower end cover, a spring, a metal pore plate, a filter medium, an adsorbent and a bolt, wherein the adsorbent is filled in the cylinder, the filter medium is arranged at the upper part of the adsorbent, the filter screen is installed on the filter medium, the metal pore plate is placed above the filter screen, and a compression spring is arranged between the upper part of the metal pore plate and the tower end cover; the lower part of the adsorbent is sequentially provided with a filter medium, a filter screen, a metal pore plate and a tower end cover; the upper and lower tower end covers are connected with the cylinder by bolts.
The filter screens are of a multi-layer structure, and the filter screens arranged in each layer of structure are the same or different.
The beneficial effects of the utility model reside in that:
1. the utility model discloses a two flow directions that regeneration switching solenoid valve admitted air in to the adsorption tower are controlled, need not low-pressure control gas, avoid additionally disposing parts such as relief pressure valve, have reduced the system size to dwindle the valve size of adoption through reasonable lectotype, realized the miniaturized design of whole device.
2. Newly designed the adsorption tower to avoided traditional design owing to use the gas holder as the adsorption tower, very inconvenient when filling and change adsorbent, and when filling occasionally certain clearance, the unable problem of filling in some dead angles. Meanwhile, the new adsorption tower solves the problem that the adsorbent is easy to be pulverized in the adsorption regeneration process.
3. In the adsorption tower, a metal baffle and a compression spring are sequentially placed on a filter screen, and an end cover is screwed to enable the spring to compress the adsorbent. Can make the adsorbent fill the zero clearance like this, also greatly reduced the pulverization of adsorbent, and make things convenient for subsequent adsorbent to change.
4. The working pressure can reach 40MPa, the dew point can be less than or equal to minus 70 ℃, and the device has small appearance and convenient installation.
Drawings
FIG. 1 is a schematic structural view of an embodiment of a small high-pressure hydrogen purification and drying apparatus of the present invention;
FIG. 2 is a cross-sectional view of an embodiment of the present invention showing an adsorption tower passing through a diametral plane;
fig. 3 is a schematic diagram of the working process during the left-side forward blowing in the embodiment of the present invention.
Wherein: 1-pressure gauge, 2-adsorption tower, 3-check valve set, 4-throttle valve, 5-air inlet regeneration switching electromagnetic valve, 21-cylinder, 22-filter screen, 23-tower end cover, 24-spring, 25-metal orifice plate, 26-filter medium, 27-adsorbent and 28-bolt.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The embodiment of the present invention as shown in fig. 1 includes: the hydrogen absorption tower comprises an adsorption tower 2, an air inlet regeneration switching electromagnetic valve 5, a check valve group 3, a throttle valve 4, a pressure gauge 1 and a connecting steel plate (not shown in the figure), wherein a hydrogen gas inlet is divided into two paths, the two paths are finally converged to a conventional hydrogen gas inlet A through the air inlet regeneration switching electromagnetic valve 5, the adsorption tower 2 and the check valve group 3 which are sequentially connected, and the pressure gauge 1 is arranged on a pipeline between the two adsorption towers 2 and the air inlet regeneration switching electromagnetic valve 5; two adsorption towers 2 are all fixedly mounted on the connecting steel plate.
The check valve group 3 comprises two sets of check valves of positive blowing and back blowing, and the interface pipeline of the adsorption tower 2 is divided into a positive blowing path and a back blowing path. The positive blowing path is connected with the hydrogen outlet through a positive blowing one-way valve; the back flushing path is connected with the interface of the adsorption tower 2 through a throttle valve 4 and a back flushing check valve in sequence.
In the present embodiment, two check valve groups 3 share one throttle valve 4; that is, the forward blowing paths of the two check valve groups 3 are merged before the throttle valve 4.
In the embodiment, all the check valves and the throttle valves 4 are directly screwed into the prefabricated holes of the connecting steel plates; the installation space is greatly saved, and the space of the connecting steel plate near the adsorption tower is fully utilized;
in the present embodiment, the intake regeneration switching solenoid valve 5 is mounted on the connecting steel plate through a solenoid valve mounting base (not shown in the figure), specifically, one end of the solenoid valve mounting base is provided with a solenoid valve mounting hole, and the other side of the solenoid valve mounting base is provided with a fixing hole; thereby realizing the simple process of switching the gas direction.
In this embodiment, the connecting steel plate that uses adopts big steel sheet to process the preparation for regeneration switches the installation of solenoid valve, check valve, choke valve, manometer, muffler etc. adopts the bolt fixed mounting, safe and reliable between two adsorption towers and the connecting steel plate simultaneously.
In the embodiment, the used air inlet regeneration switching electromagnetic valves 5 are two-position three-way high-pressure hydrogen explosion-proof electromagnetic valves, and the two-position three-way high-pressure hydrogen explosion-proof electromagnetic valves are selectively installed on the lever type high-pressure electromagnetic valves in a plate manner and are directly installed on the connecting steel plate; two-position three-way high-pressure hydrogen explosion-proof electromagnetic valves are adopted to replace the traditional 2 air inlet valves and 2 regeneration valves, so that the structure is more compact. A plate-type mounted lever-type high-pressure electromagnetic valve is further selected, the lever-type high-pressure electromagnetic valve can be directly mounted on the connecting steel plate, and the reliability of frequent opening and closing of the electromagnetic valve is ensured by adopting a lever principle; because the plate-type installation lever type high-pressure electromagnetic valve selected by the air inlet regeneration switching electromagnetic valve 5 has low power and small heat, the high-pressure electromagnetic valve can be directly installed on the connecting steel plate through the electromagnetic valve installation base; meanwhile, the high-pressure electromagnetic valve adopts a lever type principle, the electromagnetic suction force is amplified, and the reliability of frequent opening and closing of the electromagnetic valve is ensured; therefore, low-pressure control gas is not needed, additional arrangement of components such as a pressure reducing valve and the like is avoided, and the size of the system is reduced.
The adsorption tower 2 shown in fig. 2 includes: the device comprises a cylinder 21, a filter screen 22, a tower end cover 23, a spring 24, a metal pore plate 25, a filter medium 26, an adsorbent 27 and a bolt 28, wherein the adsorbent 27 is filled in the cylinder 21, the filter medium 26 is arranged at the upper part of the adsorbent, the filter screen 22 is installed on the filter medium 26, the metal pore plate 25 is placed above the filter screen 22, and a compression spring 24 is arranged between the upper part of the metal pore plate 25 and the tower end cover 23; the lower part of the adsorbent is sequentially provided with a filter medium 26, a filter screen 22, a metal pore plate 25 and a tower end cover 23; both the upper and lower tower end caps 23 are connected to the barrel 21 using bolts 28.
When the adsorption tower 2 is packaged, after the adsorption tower is filled with the adsorbent, a filter screen is arranged above the adsorbent; the metal orifice plate 25, compression spring are then placed over the screen in sequence, and the end caps are tightened and tightened with bolts 28 to compress the spring against the adsorbent. Therefore, the adsorbent can be filled without gaps, the pulverization of the adsorbent is greatly reduced, and the subsequent replacement of the adsorbent is facilitated.
Before the adsorption tower is filled with the adsorbent, a filter medium 26, a filter screen 22 and a metal pore plate 25 are installed below the adsorbent, and then a tower end cover 23 is screwed down by using a bolt 28.
In this embodiment, the cylinder 21 of the adsorption tower 2 is made of a high-pressure stainless steel tube with a relatively thin tube diameter, and replaces a high-pressure gas storage tank of a traditional heatless regenerative adsorption dryer.
In the present embodiment, the filter screen 22 has a multi-layer structure, and each layer of the structure is configured with a filter screen having a different function (oil removal, water removal, dust removal, etc.), so that the configuration of the filter can be properly reduced at the inlet and outlet of the valve.
Before working, carrying out a gas seal test and checking whether each valve can work normally or not;
the hydrogen purification drying device of the embodiment adopts PSA process, namely the working principle of pressure swing adsorption and regeneration cycle; therefore, when the adsorption tower works, high-pressure hydrogen alternately flows through two adsorption towers filled with adsorbents, namely one adsorption tower is used for adsorbing moisture or impurities in a high-pressure state (positive blowing), the other adsorption tower is used for resolving (back blowing) dry hydrogen in a low-pressure state, and then the two adsorption towers circularly work according to a preset time sequence (PLC setting); the working pressure is 40MPa, and the dew point is less than or equal to-70 ℃.
Specifically, as shown in fig. 3, an adsorption tower 2-1 first performs forward blowing, an intake path of an intake regeneration switching solenoid valve 5-1 is opened, gas is purified and dried by an adsorbent in the adsorption tower 2-1, enters a conventional hydrogen supply port through a forward blowing check valve in a check valve group 3-1 at the side to realize hydrogen supply, meanwhile, a small amount of gas sequentially passes through a throttle valve 4 and a reverse blowing check valve in a check valve group 3-2 at the other side to provide reverse blowing for the adsorption tower 2-2 at the other side, and the reverse blowing gas is discharged through an exhaust port of the other intake regeneration switching solenoid valve 5-2;
then, the air inlet circuit and the air outlet of the air inlet regeneration switching electromagnetic valve 5-1 and the air inlet regeneration switching electromagnetic valve 5-2 are switched;
the adsorption tower 2-2 is positively blown, an air inlet path of an air inlet regeneration switching electromagnetic valve 5-1 is closed, an air inlet path of the air inlet regeneration switching electromagnetic valve 5-2 is opened, gas is purified and dried through an adsorbent in the adsorption tower 2-2, the gas enters a conventional hydrogen gas supply port through a positive blowing one-way valve in a one-way valve group 3-2 at the side to realize hydrogen gas supply, meanwhile, a small amount of gas sequentially passes through a throttle valve 4 and a back blowing one-way valve in a one-way valve group 3-1 at the other side to provide back blowing gas for the adsorption tower 2-1 at the other side, and the back blowing gas is discharged through an air outlet of the air inlet regeneration switching electromagnetic valve 5-1. Then returning to the positive blowing process of the adsorption tower 2-1, and sequentially and alternately operating to realize the hydrogen purification and drying work.
Claims (7)
1. A small-sized high-pressure hydrogen purifying and drying apparatus, comprising: the hydrogen adsorption device comprises an adsorption tower (2), an air inlet regeneration switching electromagnetic valve (5), a check valve group (3), a throttle valve (4), a pressure gauge (1) and a connecting steel plate, wherein a hydrogen inlet is divided into two paths and is finally converged to a conventional hydrogen supply port through the air inlet regeneration switching electromagnetic valve (5), the adsorption tower (2) and the check valve group (3) which are connected in sequence, and the two adsorption towers (2) are fixedly arranged on the connecting steel plate;
the check valve group (3) comprises a positive blowing check valve group and a back blowing check valve group, and an interface pipeline of the adsorption tower (2) is divided into a positive blowing path and a back blowing path; the forward blowing path is connected with the hydrogen outlet through a forward blowing one-way valve; the back flushing path is connected with the interface of the adsorption tower (2) through a throttle valve (4) and a back flushing check valve in sequence.
2. The small-sized high-pressure hydrogen purifying and drying device according to claim 1, wherein a pressure gauge (1) is provided on a pipeline between the adsorption tower (2) and the on-line intake regeneration switching solenoid valve (5).
3. A small-sized high-pressure hydrogen purifying and drying apparatus according to claim 1, wherein the forward blowing paths of the two check valve sets (3) are merged before the throttle valve (4).
4. A small-sized high-pressure hydrogen purification drying device according to claim 1, wherein the throttle valve (4) and all the check valves of the two check valve groups (3) are directly screwed into the prefabricated holes of the connecting steel plates.
5. The small-sized high-pressure hydrogen purification and drying device as claimed in claim 1, wherein the intake regeneration switching solenoid valve (5) is installed on the connecting steel plate through a solenoid valve installation base.
6. A small-sized high-pressure hydrogen purification drying apparatus according to claim 1, wherein the adsorption tower (2) comprises: the device comprises a cylinder body (21), a filter screen (22), a tower end cover (23), a spring (24), a metal pore plate (25), a filter medium (26), an adsorbent (27) and a bolt (28), wherein the adsorbent (27) is filled in the cylinder body (21), the filter medium (26) is arranged on the upper part of the adsorbent, the filter screen (22) is installed on the filter medium (26), the metal pore plate (25) is placed above the filter screen (22), and a compression spring (24) is arranged between the upper part of the metal pore plate (25) and the tower end cover (23); the lower part of the adsorbent is sequentially provided with a filter medium (26), a filter screen (22), a metal pore plate (25) and a tower end cover (23); the upper and lower tower end covers (23) are connected to the drum (21) using bolts (28).
7. The small-sized high-pressure hydrogen purification and drying device as claimed in claim 6, wherein the filter screens (22) are of a multi-layer structure, and the filter screens of each layer are the same or different.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221796766.1U CN217829473U (en) | 2022-07-13 | 2022-07-13 | Small-size high-pressure hydrogen purification drying device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221796766.1U CN217829473U (en) | 2022-07-13 | 2022-07-13 | Small-size high-pressure hydrogen purification drying device |
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| Publication Number | Publication Date |
|---|---|
| CN217829473U true CN217829473U (en) | 2022-11-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221796766.1U Active CN217829473U (en) | 2022-07-13 | 2022-07-13 | Small-size high-pressure hydrogen purification drying device |
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| Country | Link |
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| CN (1) | CN217829473U (en) |
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2022
- 2022-07-13 CN CN202221796766.1U patent/CN217829473U/en active Active
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