Hydrogen drying device with low pressure, low dew point and low pressure drop

Abstract

The utility model relates to the technical field of hydrogen drying devices, in particular to a low-pressure, low-dew-point and low-pressure-drop hydrogen drying device which comprises an adsorption tower which comprises a tower A and a tower B, after water is cooled and separated through a regeneration cooler and a regeneration gas-water separator, the hydrogen enters an adsorption tower A through V1 to absorb water and dry to meet the requirement, the hydrogen is discharged out of the tower and passes through V7 to reach a gas using point, a small part of about 20% of gas is divided from dry gas at an outlet and is electrically heated to 180 DEG C, and the gas is sent to a tower B through V6 to regenerate and activate an adsorbent; hydrogen absorbing moisture is discharged from the tower and enters a gas inlet cooler and a gas inlet gas-water separator through a V4, the temperature of the cooled and dehydrated hydrogen is greatly increased after the cooled and dehydrated hydrogen is pressurized by a booster pump, the cooled and dehydrated hydrogen is converged with hydrogen at an inlet and then passes through a regeneration cooler and a regeneration gas-water separator, the cooled and dehydrated hydrogen returns to the adsorption tower A to adsorb moisture, and first-step pressurized reflux drying is completed; and similarly, hydrogen is adsorbed from the tower B, is subjected to split-flow heating regeneration, passes through the tower A, is pressurized and then flows back to the tower B again.

Description

Technical Field

[0001] The utility model relates to the technical field of hydrogen drying devices, in particular to a hydrogen drying device with low pressure, low dew point and low pressure drop. Background Technique

[0002] Low dew point drying devices are mainly adsorption products. However, hydrogen is an inflammable and explosive gas, and it cannot be dried by the method of pressure swing adsorption. It can only be dried by the method of temperature swing adsorption.

[0003] However, to obtain a low dew point, dry gas split stream heating regeneration is necessary. To obtain a low pressure drop at a low working pressure, the method of pressurized heating regeneration must be adopted. After years of research, our company has finally successfully developed a hydrogen drying product with dry gas split stream heating regeneration, low pressure, low dew point and low pressure drop. This product fully meets the requirements of a hydrogen drying device with low pressure, low dew point and low pressure drop. The advantage of this product is that it can meet the low dew point requirement at a relatively low working pressure. Content of the Utility Model

[0004] The purpose of the utility model is to provide a hydrogen drying device with low pressure, low dew point and low pressure drop, so as to solve the problems put forward in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solutions:

[0006] A hydrogen drying device with low pressure, low dew point and low pressure drop, comprising:

[0007] An adsorption tower, the adsorption tower includes tower A and tower B, and both tower A and tower B are installed on a base;

[0008] A regeneration cooler, the regeneration cooler is arranged in the middle at the rear of the adsorption tower. A regeneration gas water separator is also arranged in the middle at the rear of the adsorption tower, and the regeneration gas water separator is arranged at the lower right of the regeneration cooler;

[0009] A pressurization fan is arranged below tower A, and a heater is installed above the pressurization fan.

[0010] Further, dry gas outlets are arranged at the rear and right sides of tower A and tower B, and a wet gas inlet is also arranged at the middle rear part on the right side of tower A and tower B.

[0011] Further, the regeneration cooler is communicated with the regeneration gas water separator, and the regeneration gas water separator is respectively communicated with the regeneration cooler, tower A, tower B and the pressurization fan.

[0012] Further, an intake air cooler is provided in the middle of the front side of the A tower and the B tower, and an intake air-water separator is provided at the rear right of the intake air cooler. The intake air cooler and the intake air-water separator are respectively connected to the A tower and the B tower.

[0013] Further, a number of valves are provided on the adsorption tower. The number of valves is sequentially set as V1-V8. V1 and V2 are provided below the rear side of the tower body of the adsorption tower. V1 and V2 are intake valves.

[0014] Further, the V7 and V8 valves are provided above the front of the tower body of the adsorption tower. V7 and V8 are outlet valves. The V3 and V4 valves are below the front side of the tower body of the adsorption tower. V3 and V4 are heating regeneration and cooling outlet valves. The V5 and V6 valves are provided above the rear side of the tower body. V5 and V6 are heating regeneration and cooling intake valves. A heater H is installed below the V5, V6, V7 and V8 valves.

[0015] Further, the adsorption tower is equipped with a regeneration cooler E1 and an intake air cooler E2, as well as a regeneration air-water separator F1 connected to the regeneration cooler E1 and an intake air-water separator F2 connected to the intake air cooler E2.

[0016] Further, the E2 and the F2 are connected to one end of the booster fan C, and the E1 and the F1 are connected to the other end of the booster fan C.

[0017] Compared with the prior art, the beneficial effects of the present utility model are:

[0018] In the present utility model, when low-pressure saturated wet hydrogen enters from the equipment inlet, it passes through the intake regeneration cooler, the intake and regeneration air-water separators to cool and separate moisture, and then enters the adsorption tower A through V1 to absorb moisture and dry the hydrogen to meet the requirements. The hydrogen exits the tower through V7 to the gas-using point. A small part of the dry gas at the outlet, about 20% of the gas, is electrically heated to 180°C and sent to the B tower through V6 to regenerate the adsorbent. The hydrogen that has absorbed moisture exits the tower through V4 to the intake and regeneration coolers, the regeneration and intake air-water separators. After cooling and dehydrating, the hydrogen temperature will rise significantly after being pressurized by the booster pump. After merging with the inlet hydrogen, it passes through the intake and regeneration coolers, the intake and regeneration air-water separators again, and the cooled and dehydrated hydrogen returns to the adsorption tower A to adsorb moisture, completing the first step of pressurized reflux drying. The second step is the same. Hydrogen enters the adsorption from the B tower, is shunted and heated for regeneration through the A tower, and after pressurization, it returns to the B tower again. Description of the Drawings

[0019] Figure 1 is a schematic flow structure diagram of the present utility model;

[0020] Figure 2 is a front view of the back structure of the present utility model;

[0021] Figure 3 This is the front structure front view of the present utility model.

[0022] In the figure: Tower A 1, Tower B 2, regeneration cooler 3, regeneration gas-water separator 4, dry gas outlet 5, booster fan 6, wet gas inlet 7, intake cooler 8, intake gas-water separator 9. Detailed implementation manners

[0023] In order to more clearly illustrate the overall concept of the present utility model, the following will be further described in detail by way of examples in combination with the accompanying drawings of the specification.

[0024] It should be noted that many specific details are set forth in the following description to facilitate a thorough understanding of the present utility model. However, the present utility model can also be implemented in other ways different from those described herein. Therefore, the protection scope of the present utility model is not limited by the specific embodiments disclosed below.

[0025] In addition, in the description of the present utility model, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model.

[0026] In the present utility model, unless otherwise clearly defined and limited, the terms "installation", "connection", "connection", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be directly connected, or indirectly connected through an intermediate medium, and can be the internal communication of two elements or the interaction relationship between two elements. However, indicating a direct connection means that there is no connection relationship constructed through an excessive structure between the two connected main bodies, and only a connection structure is used to connect them to form a whole. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0027] In the present utility model, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to terms such as "an embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0028] Please refer to the attached Figure 1 to the attached Figure 3 As shown, the present utility model provides a hydrogen drying device with low pressure, low dew point and low pressure drop, including:

[0029] Adsorption towers, the adsorption towers include Tower A 1 and Tower B 2, and both Tower A 1 and Tower B 2 are installed on the base;

[0030] Regeneration cooler 3, the regeneration cooler 3 is arranged in the middle at the rear of the adsorption tower, and a regeneration gas water separator 4 is also arranged in the middle at the rear of the adsorption tower, and the regeneration gas water separator 4 is arranged at the lower right of the regeneration cooler 3;

[0031] A booster fan 6 is arranged below Tower A 1, and a heater is installed above the booster fan 6.

[0032] Dry gas outlets 5 are arranged at the rear and right sides of both Tower A 1 and Tower B 2, and a wet gas inlet 7 is also arranged in the middle and rear part on the right side of both Tower A 1 and Tower B 2.

[0033] The regeneration cooler 3 is communicated with the regeneration gas water separator 4, and the regeneration gas water separator 4 is respectively communicated with the regeneration cooler 3, Tower A 1, Tower B 2 and the booster fan 6.

[0034] An intake cooler 8 is arranged in the middle at the front side of both Tower A 1 and Tower B 2, and an intake gas water separator 9 is arranged at the rear right side of the intake cooler 8, and the intake cooler 8 and the intake gas water separator 9 are respectively communicated with Tower A 1 and Tower B 2.

[0035] A number of valves are arranged on the adsorption tower, and the number of valves are sequentially set as V1 - V8. V1 and V2 are arranged at the lower part at the rear side of the tower body of the adsorption tower, and V1 and V2 are intake valves.

[0036] The V7 and V8 valves are arranged above the front of the tower body of the adsorption tower. V7 and V8 are outlet valves. The V3 and V4 valves are arranged below the front side of the tower body of the adsorption tower. V3 and V4 are heating regeneration and cooling outlet valves. The V5 and V6 valves are arranged above the rear side of the tower body. V5 and V6 are heating regeneration and cooling inlet valves. A heater H is installed below the V5, V6, V7 and V8 valves.

[0037] The adsorption tower is equipped with a regeneration cooler E1 and an inlet cooler E2, as well as a regeneration gas-water separator F1 connected to the regeneration cooler E1 and an inlet gas-water separator F2 connected to the inlet cooler E2.

[0038] The E2 and the F2 are connected to one end of a booster fan C, and the E1 and the F1 are connected to the other end of the booster fan C.

[0039] Working principle: When low-pressure saturated wet hydrogen enters from the equipment wet gas inlet 7, after being cooled and separated from moisture by the inlet cooler 8, the regeneration cooler 3, the inlet gas-water separator 9 and the regeneration gas-water separator 5, it enters Tower A 1 through V1 to absorb moisture and dry the hydrogen. The dried hydrogen that meets the requirements exits the tower through V7 to the gas usage point. A small part of the outlet dry gas, about 20% of the gas, is electrically heated to 180 °C and sent to Tower B 2 through V6 to regenerate the adsorbent. The hydrogen that has absorbed moisture exits the tower through V4 to the regeneration cooler 3 and the regeneration gas-water separator 4. After the hydrogen is pressurized by the booster pump, its temperature will rise significantly. After merging with the inlet hydrogen, it passes through the inlet cooler 8 and the inlet gas-water separator 9, and the hydrogen after cooling and dehydrating returns to Tower A 1 to adsorb moisture, completing the first step of pressurized reflux drying. Similarly, for the second step, hydrogen enters the adsorption in Tower B 2, is shunted and heated for regeneration through Tower A 1, and after pressurization, it returns to Tower B 2 again.

[0040] Those of ordinary skill in the art should understand that the discussion of any above embodiment is only exemplary and is not intended to imply that the scope of the present invention includes the claims being limited to these examples; under the concept of the present invention, the technical features in the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations in different aspects of the present invention as described above, which are not provided in detail for the sake of brevity.

[0041] The present invention aims 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 the present invention shall be included within the protection scope of the present invention.

Claims

1. A hydrogen drying device with low pressure, low dew point and low pressure drop, characterized in that, Comprising: An adsorption tower, the adsorption tower includes Tower A (1) and Tower B (2), and both Tower A (1) and Tower B (2) are installed on a base; A regeneration cooler (3), the regeneration cooler (3) is arranged in the middle at the rear of the adsorption tower, and a regeneration gas water separator (4) is also arranged in the middle at the rear of the adsorption tower, and the regeneration gas water separator (4) is arranged at the lower right of the regeneration cooler (3); A booster fan (6) is arranged below Tower A (1), and a heater is installed above the booster fan (6).

2. The hydrogen drying device with low pressure, low dew point and low pressure drop according to claim 1, characterized in that Dry gas outlets (5) are arranged at the rear and right sides of both Tower A (1) and Tower B (2), and a wet gas inlet (7) is also arranged in the middle and rear part on the right side of both Tower A (1) and Tower B (2).

3. The hydrogen drying device with low pressure, low dew point and low pressure drop according to claim 1, wherein The regeneration cooler (3) is communicated with the regeneration gas water separator (4), and the regeneration gas water separator (4) is respectively communicated with the regeneration cooler (3), Tower A (1), Tower B (2) and the booster fan (6).

4. The hydrogen drying device with low pressure, low dew point and low pressure drop according to claim 1, characterized in that, An intake air cooler (8) is arranged in the middle at the front side of both Tower A (1) and Tower B (2), and an intake air water separator (9) is arranged at the rear right side of the intake air cooler (8), and the intake air cooler (8) and the intake air water separator (9) are respectively communicated with Tower A (1) and Tower B (2).

5. The hydrogen drying device with low pressure, low dew point and low pressure drop according to claim 1, characterized in that, A number of valves are arranged on the adsorption tower, and the number of valves are sequentially set as V1 - V8. V1 and V2 are arranged at the lower part at the rear side of the tower body of the adsorption tower, and V1 and V2 are intake valves.

6. The hydrogen drying device with low pressure, low dew point and low pressure drop according to claim 5, characterized in that, Valves V7 and V8 are arranged at the upper front of the tower body of the adsorption tower, V7 and V8 are outlet valves, valves V3 and V4 are arranged at the lower front side of the tower body of the adsorption tower, V3 and V4 are heating regeneration and cooling outlet valves, valves V5 and V6 are arranged at the upper rear side of the tower body, V5 and V6 are heating regeneration and cooling intake valves, and heaters H are installed below valves V5, V6, V7 and V8.

7. The hydrogen drying device with low pressure, low dew point and low pressure drop according to claim 1, characterized in that, The adsorption tower is equipped with a regeneration cooler E1 and an intake air cooler E2, as well as a regeneration gas water separator F1 connected to the regeneration cooler E1 and an intake air water separator F2 connected to the intake air cooler E2.

8. The hydrogen drying device with low pressure, low dew point and low pressure drop according to claim 7, characterized in that, E2 and F2 are connected to one end of a booster fan C, and E1 and F1 are connected to the other end of the booster fan C.

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