Low-dew-point three-tower hydrogen drying device

Abstract

The utility model relates to the technical field of hydrogen drying, in particular to a low-dew-point three-tower hydrogen drying device which comprises three drying towers, namely a tower A, a tower B and a tower C in sequence from left to right. An air inlet pipe is arranged in the middle of the rear side of the drying tower, and an air outlet pipe is arranged above the rear side of the drying tower; partial high-pressure saturated wet hydrogen is shunted by about 20% to V8 through a V19 flow control valve and enters a tower B, an adsorbent regenerated at a high temperature in the previous stage is cooled, and relatively dry hydrogen is obtained, enters an electric heater from V11, is heated to about 180 DEG C and then enters a tower C through V18; after being activated, regenerated and dried, an adsorbent in the tower C enters a cooler and a gas-water separator from a V15 valve, water is separated, liquid water is discharged, the liquid water is converged with gas at an outlet of a V19 valve and enters a tower A through a V1 to adsorb water in the hydrogen, so that the purpose of drying the hydrogen is achieved, and product gas is discharged from a V4 valve to a gas using point.

Description

Technical Field

[0001] This utility model relates to the field of hydrogen drying technology, specifically a low dew point three-tower hydrogen drying device. Background Technology

[0002] Drying is an operation that uses heat energy to vaporize the moisture in wet materials, and then uses airflow or vacuum to remove the vaporized moisture, thereby obtaining dry materials. Examples include drying materials in wet granulation, spray drying of solutions, and drying of fluid extracts.

[0003] In existing technologies, low dew point drying devices mainly adsorb products. However, hydrogen is a flammable and explosive gas and cannot be dried by pressure swing adsorption. It can only be dried by temperature swing adsorption. To obtain a low dew point, it is necessary to heat and regenerate the dry gas. This is particularly energy-efficient because the heat energy inside the tower during the preheating and regeneration process is fully utilized during the hydrogen heating and regeneration process. Utility Model Content

[0004] The purpose of this invention is to provide a low dew point three-tower hydrogen drying device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] A low dew point three-tower hydrogen drying device, comprising:

[0007] The drying towers are configured to be three in number, and from left to right, they are tower A, tower B and tower C.

[0008] An air inlet pipe is provided in the middle of the rear side of the drying tower, and an air outlet pipe is provided above the rear side of the drying tower.

[0009] The inlet and outlet pipes are equipped with flow meters to control the heating and regeneration flow rate, and the feedback signal is sent to V19 to control the flow rate to enter towers A, B and C at a certain flow rate.

[0010] A heater is provided at the middle of the front side of the drying tower, and a cooler is also provided at the middle of the front side of the drying tower, which is located below the heater.

[0011] Furthermore, the branch pipes of the air inlet pipe are respectively connected to the middle of the A tower, the B tower and the C tower, and the air outlet pipe is respectively connected to the top of the A tower, the B tower and the C tower.

[0012] Furthermore, each of the three towers, A, B, and C, has a feeding port at its top and a discharge port at its bottom.

[0013] Furthermore, the rear surfaces of tower A, tower B, and tower C are provided with interfaces, and tower A, tower B, and tower C are connected to pressure gauges through the interfaces.

[0014] Furthermore, the drying device includes several valves, which are numbered V1-V19 in sequence. Valves V1, V2, and V3 are located at the lower rear side of the tower body, valves V4, V5, and V6 are located at the upper rear side of the tower body, valve V19 is located at the middle rear side of the tower body, valves V7, V8, V9, V13, V14, and V15 are located at the lower front side of the tower body, and valves V10, V11, V12, V16, V17, and V18 are located at the upper front side of the tower body.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] This invention uses the V19 flow control valve to divert approximately 20% of the high-pressure saturated wet hydrogen gas to V8, which then enters tower B to cool the adsorbent that has already undergone high-temperature regeneration in the previous stage. Simultaneously, relatively dry hydrogen gas exits from V11 and enters an electric heater to be heated to approximately 180°C. It then passes through V18 into tower C, where the adsorbent in tower C undergoes activation, regeneration, and drying treatment. After this process, the hydrogen gas exits from valve V15 and enters a cooler and gas-liquid separator to separate moisture. The liquid water is then discharged through an automatic drainer and merges with the gas exiting valve V19, passing through V1 into tower A to adsorb moisture from the hydrogen gas, thereby achieving the purpose of drying the hydrogen gas. The product gas exits from valve V4 to the point of use. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0018] Figure 2 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 3 This is a front view of the overall rear structure of this utility model;

[0020] Figure 4 This is a front view of the overall structure of this utility model.

[0021] In the diagram: Tower A 1, Tower B 2, Tower C 3, Inlet pipe 4, Outlet pipe 5, Heater 6, Cooler 7, Feed port 8, Discharge port 9, Pressure gauge 10, Drain port 11, Main drain port 12. Detailed Implementation

[0022] To more clearly illustrate the overall concept of this utility model, a detailed description will be provided below with reference to the accompanying drawings.

[0023] It should be noted that many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0024] Furthermore, it should be understood in the description of this utility model that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0025] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral unit; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. However, specifying a direct connection indicates that the two main bodies at the connection point are not connected by an intermediate structure, but are simply connected to form a whole through a connecting structure. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0026] In this utility model, unless otherwise expressly specified and limited, the first feature "on" or "below" the second feature may be in direct contact with the first and second features, or indirect contact through an intermediate medium. In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0027] Please see the appendix Figure 1 To be continued Figure 4 As shown, this utility model provides a low dew point three-tower hydrogen drying device, comprising:

[0028] The drying towers are configured to be three in number, and from left to right, they are tower A1, tower B2 and tower C3.

[0029] The structure of tower A1, tower B2 and tower C3 is used to adsorb, cool and regenerate high-pressure saturated wet hydrogen, thereby achieving the drying operation of hydrogen.

[0030] An air inlet pipe 4 is provided in the middle of the rear side of the drying tower, and an air outlet pipe 5 is provided above the rear side of the drying tower.

[0031] External gas is introduced into the drying tower through the structure of the air inlet pipe 4.

[0032] The inlet pipe 4 and outlet pipe 5 are equipped with flow meters to control the heating and regeneration flow rate, and the feedback signal is sent to V19 to control the flow rate to enter tower A1, tower B2 and tower C3 at a certain flow rate.

[0033] The flow meter is designed to measure and count the flow rate of materials in the three drying towers, A-tower 1, B-tower 2, and C-tower 3, and to control the flow of materials in towers A-tower 2, B-tower 2, and C-tower 3 via feedback signal control V19.

[0034] Heater 6 is provided at the middle front part of the drying tower, and cooler 7 is also provided at the middle front part of the drying tower, which is located below heater 6.

[0035] The branch pipes of the air inlet pipe 4 are respectively connected to the middle of the A tower 1, the B tower 2 and the C tower 3, and the air outlet pipe 5 is respectively connected to the top of the A tower 1, the B tower 2 and the C tower 3.

[0036] The hydrogen gas to be dried is introduced into towers A1, B2 and C3 through the inlet pipe 4, and the gas processed in towers A1, B2 and C3 is discharged out through the outlet pipe 5.

[0037] The upper ends of tower A1, tower B2 and tower C3 are respectively provided with feeding ports 8, and the bottom ends of tower A1, tower B2 and tower C3 are respectively provided with discharging ports 9.

[0038] The material is fed into and discharged into the three drying towers through the structure of the feeding port 8 and the discharge port 9.

[0039] The rear surfaces of tower A1, tower B2, and tower C3 are provided with interfaces, and tower A1, tower B2, and tower C3 are connected to pressure gauge 10 through the interfaces.

[0040] The pressure gauge 10 is used to monitor the gas pressure in tower A1, tower B2 and tower C3 in real time.

[0041] The drying device includes several valves, which are numbered V1-V19 in sequence. Valves V1, V2, and V3 are located at the lower rear side of the tower body, valves V4, V5, and V6 are located at the upper rear side of the tower body, valve V19 is located at the middle rear side of the tower body, valves V7, V8, V9, V13, V14, and V15 are located at the lower front side of the tower body, and valves V10, V11, V12, V16, V17, and V18 are located at the upper front side of the tower body.

[0042] The specific steps of this scheme are as follows: When high-pressure saturated wet hydrogen enters through the inlet of inlet pipe 4, about 20% of the high-pressure saturated wet hydrogen is diverted to V8 via flow control valve V19 and enters tower B 2 to cool the adsorbent that has been regenerated at high temperature in the previous stage. At the same time, relatively dry hydrogen is obtained and enters heater 6 through V11 to be heated to about 180°C. Then it enters tower C 3 through V18. After the adsorbent in tower C 3 is activated, regenerated and dried, it enters cooler 7 and gas-liquid separator through valve V15. The water is separated and discharged through drain outlet 11. The liquid water is then combined with the gas at the outlet of valve V19 and enters tower A 1 through V1 to adsorb the water in the hydrogen, thereby achieving the purpose of drying the hydrogen. The product gas exits through valve V4 to the gas consumption point.

[0043] Similarly, the second step is adsorption in tower B, cooling in tower C, and regeneration in tower A. The third step is adsorption in tower C, cooling in tower A, and regeneration in tower B, completing one cycle.

[0044] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples; within the framework of the present invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in the details for the sake of brevity.

[0045] This utility model is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A low dew point three-tower hydrogen drying device, characterized in that, include: The drying towers are set to three in number, and the drying towers are A tower (1), B tower (2) and C tower (3) from left to right. An air inlet pipe (4) is provided in the middle of the rear side of the drying tower, and an air outlet pipe (5) is provided above the rear side of the drying tower. The inlet pipe (4) and outlet pipe (5) are equipped with flow meters, which provide feedback signals to V19 to control the flow rate to enter tower A (1), tower B (2) and tower C (3). A heater (6) is provided in the middle of the front side of the drying tower. A cooler (7) is also provided in the middle of the front side of the drying tower. The cooler (7) is provided below the heater (6).

2. The low dew point three-tower hydrogen drying device according to claim 1, characterized in that, The branch pipe of the air inlet pipe (4) is connected to the bottom of the A tower (1), the B tower (2) and the C tower (3) respectively through a flow meter, and the air outlet pipe (5) is connected to the top of the A tower (1), the B tower (2) and the C tower (3) respectively.

3. The low dew point three-tower hydrogen drying device according to claim 1, characterized in that, The upper ends of tower A (1), tower B (2) and tower C (3) are respectively provided with feeding ports (8), and the lower ends of tower A (1), tower B (2) and tower C (3) are respectively provided with discharging ports (9).

4. The low dew point three-tower hydrogen drying device according to claim 1, characterized in that, The rear surfaces of tower A (1), tower B (2) and tower C (3) are provided with interfaces, and tower A (1), tower B (2) and tower C (3) are connected to pressure gauge (10) through the interfaces.

5. The low dew point three-tower hydrogen drying device according to claim 1, characterized in that, The drying device includes several valves, which are numbered V1-V19 in sequence. Valves V1, V2, and V3 are located at the lower rear side of the tower body, valves V4, V5, and V6 are located at the upper rear side of the tower body, valve V19 is located at the middle rear side of the tower body, valves V7, V8, V9, V13, V14, and V15 are located at the lower front side of the tower body, and valves V10, V11, V12, V16, V17, and V18 are located at the upper front side of the tower body.

Images