A hydrogen production system drying tank device

Abstract

The utility model discloses a kind of hydrogen production system drying tank devices, including outer layer heat preservation pipe, the inside of outer layer heat preservation pipe is nested with inner layer stainless steel pipe, the middle part of outer layer heat preservation pipe top is provided with feeding opening, the side of outer layer heat preservation pipe top is provided with exhaust port, the middle part of outer layer heat preservation pipe bottom is provided with discharge port, the bottom of outer layer heat preservation pipe is provided with gas inlet;The inside of inner layer stainless steel pipe is evenly provided with four groups of heater pipe cylinder, the inside of heater pipe cylinder is filled with magnesium oxide, and heater pipe cylinder is provided with heating rod on;The inside of inner layer stainless steel pipe is provided with molecular sieve, temperature sensor is provided on the outer wall of outer layer heat preservation pipe;The utility model passes through gradient heat preservation system, utilizes the heat conduction coefficient characteristics of air ultra-low, effectively reduces heat loss;Magnesium oxide matrix heat transfer system, four stick array type heating structure, so that the heating of molecular sieve is uniform, avoid traditional molecular sieve local overheating;Greatly prolong the life of molecular sieve.

Description

Technical Field

[0001] This utility model relates to the field of drying tank technology in hydrogen production systems, specifically a drying tank device for hydrogen production systems. Background Technology

[0002] Hydrogen produced by a hydrogen production system needs to undergo processes such as deoxygenation and drying to obtain hydrogen with higher purity.

[0003] In proton exchange membrane hydrogen production systems, the dryness of hydrogen directly affects the lifespan of fuel cells and system efficiency. There are two main methods for heating molecular sieves in existing drying tanks: one is direct contact heating between a single-layer tank body and an insert heating rod; the other is heating with an external insulation jacket.

[0004] Both types of drying devices have three major technical challenges:

[0005] 1. Thermal management defects: The current single-layer tank temperature fluctuates by ±8℃ in an environment test at -20℃, resulting in a 42% decrease in the water absorption capacity of the molecular sieve desiccant.

[0006] 2. Heating safety hazards: The direct-insertion heating rod is in direct contact with the molecular sieve. After 1200 hours of continuous operation, there is a 15% probability of local hot spots appearing, which may cause the molecular sieve crystal structure to collapse and generate dust that contaminates the hydrogen gas flow channel.

[0007] 3. High price: Traditional insulation and heating jackets are relatively expensive; they have low heating efficiency and high energy consumption; the molecular sieve in the middle part is not heated evenly; and the heating jacket is often very thick, making installation inconvenient. Utility Model Content

[0008] The purpose of this invention is to provide a drying tank device for a hydrogen production system to solve the existing problems mentioned in the background art.

[0009] To achieve the above objectives, this utility model provides the following technical solution: a drying tank device for a hydrogen production system, comprising an outer insulation pipe, an inner stainless steel pipe nested inside the outer insulation pipe, a feeding port provided at the middle of the top of the outer insulation pipe, an exhaust port provided on one side of the top of the outer insulation pipe, a discharge port provided at the middle of the bottom of the outer insulation pipe, and an air inlet provided at the bottom of the outer insulation pipe;

[0010] The inner stainless steel tube has four sets of heater tubes evenly arranged inside. The heater tubes are filled with magnesium oxide and have heating rods installed on them.

[0011] The inner stainless steel tube contains a molecular sieve, and the outer insulation tube has a temperature sensor installed on its outer wall.

[0012] Preferably, an annular air gap layer is formed between the outer insulation pipe and the inner stainless steel pipe, which effectively reduces heat loss by utilizing the ultra-low thermal conductivity of air.

[0013] Preferably, the four sets of heater tubes are arranged longitudinally inside the inner stainless steel tube, and one side opening of the heater tube extends to the outside of the outer insulation tube for installing heating rods.

[0014] Preferably, both the feed port and the discharge port are equipped with pneumatic ball valves, and one end of the feed port and the discharge port is an external thread plug cap structure with a PTFE gasket embedded in the cap, which can significantly reduce costs while ensuring good sealing.

[0015] Preferably, the input end of the temperature sensor extends into the interior of the inner stainless steel tube, and the temperature sensor is used to monitor the internal state of the tube in real time.

[0016] Preferably, both the exhaust port and the air inlet are provided with sealing caps for opening and closing operations.

[0017] Compared with the prior art, the beneficial effects of this utility model are: the drying tank device of the hydrogen production system;

[0018] 1. Gradient insulation system: The inner stainless steel tube is nested within the outer insulation tube to form an annular air gap layer. By utilizing the ultra-low thermal conductivity of air, heat loss is effectively reduced.

[0019] 2. The magnesium oxide matrix heat transfer system features a four-bar array heating structure. Each heating bar is covered with a magnesium oxide sintered sleeve to form a uniform heat conduction layer, ensuring uniform heating of the molecular sieve and avoiding localized overheating common in traditional molecular sieves. This significantly extends the lifespan of the molecular sieve.

[0020] 3. Modular integrated design, using standard quick-change interfaces to construct the gas path matrix; pneumatic ball valves are configured at the feed port and discharge port to achieve quick replacement of molecular sieves; external thread plugs with embedded PTFE gaskets are configured at the feed port and discharge port to significantly reduce costs while ensuring good sealing;

[0021] The drying tank has a compact structure and a small footprint; it integrates a temperature sensor into the tube wall to monitor the internal condition of the tank. Attached Figure Description

[0022] Figure 1 This is the front view of the present invention;

[0023] Figure 2 This is a side sectional view of the present invention.

[0024] In the diagram: 1. Outer insulation pipe; 2. Inner stainless steel pipe; 3. Heater tube; 4. Magnesium oxide; 5. Heating rod; 6. Exhaust port; 7. Feed port; 8. Air inlet; 9. Discharge port; 10. Molecular sieve; 11. Temperature sensor. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figure 1-2 The present invention provides an embodiment of a hydrogen production system drying tank device, comprising an outer insulation pipe 1, an inner stainless steel pipe 2 nested inside the outer insulation pipe 1, an annular air gap layer between the outer insulation pipe 1 and the inner stainless steel pipe 2, a feeding port 7 provided in the middle of the top of the outer insulation pipe 1, an exhaust port 6 provided on one side of the top of the outer insulation pipe 1, a discharge port 9 provided in the middle of the bottom of the outer insulation pipe 1, an air inlet 8 provided at the bottom of the outer insulation pipe 1, a pneumatic ball valve provided on both the feeding port 7 and the discharge port 9, and one end of the feeding port 7 and the discharge port 9 is an external threaded cap structure with a PTFE gasket embedded in the cap, and a sealing cap provided on both the exhaust port 6 and the air inlet 8;

[0027] Four sets of heater tubes 3 are evenly arranged inside the inner stainless steel tube 2. The four sets of heater tubes 3 are arranged longitudinally inside the inner stainless steel tube 2, and one side opening of the heater tube 3 extends to the outside of the outer insulation tube 1. The heater tube 3 is filled with magnesium oxide 4, and a heating rod 5 is provided on the heater tube 3.

[0028] A molecular sieve 10 is installed inside the inner stainless steel tube 2, and a temperature sensor 11 is installed on the outer wall of the outer insulation tube 1. The input end of the temperature sensor 11 extends into the inner stainless steel tube 2.

[0029] Working principle: The drying tank uses a 316L inner stainless steel tube 2 nested within a 304 outer insulation tube 1 to form an annular air gap layer. Utilizing the ultra-low thermal conductivity of air, heat loss is effectively reduced. Actual tests show that this structure is more energy-efficient than traditional structures.

[0030] The magnesium oxide matrix heat transfer system features a four-group heating rod array structure. Each heating rod is covered with a 0.5mm uniform heat conduction layer formed by sintering magnesium oxide tubing. This ensures uniform heating of the molecular sieve 10, avoiding localized overheating common in traditional molecular sieves and significantly extending its lifespan. The modular integrated design utilizes standard quick-change interfaces to construct a gas path matrix. Pneumatic ball valves are installed at the feed port 7 and discharge port 9 for rapid molecular sieve replacement. Both the feed port 7 and discharge port 9 are equipped with external threaded plugs and embedded PTFE gaskets, achieving significant cost reduction while maintaining good sealing.

[0031] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0032] In the description of this utility model, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" or "linked" should be interpreted broadly, for example, it can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. 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.

Claims

1. A drying tank device for a hydrogen production system, comprising an outer insulation pipe (1), characterized in that: The outer insulation pipe (1) is nested with an inner stainless steel pipe (2). A feeding port (7) is provided at the middle of the top of the outer insulation pipe (1). An exhaust port (6) is provided on one side of the top of the outer insulation pipe (1). A discharge port (9) is provided at the middle of the bottom of the outer insulation pipe (1). An air inlet (8) is provided at the bottom of the outer insulation pipe (1). The inner stainless steel tube (2) is uniformly provided with four sets of heater tubes (3), the heater tubes (3) are filled with magnesium oxide (4), and heating rods (5) are provided on the heater tubes (3). The inner stainless steel tube (2) is equipped with a molecular sieve (10), and the outer insulation tube (1) is equipped with a temperature sensor (11) on its outer wall.

2. The drying tank device for a hydrogen production system according to claim 1, characterized in that: An annular air gap layer is formed between the outer insulation pipe (1) and the inner stainless steel pipe (2).

3. The drying tank device for a hydrogen production system according to claim 1, characterized in that: The four sets of heater tubes (3) are arranged longitudinally inside the inner stainless steel tube (2), and the opening on one side of the heater tube (3) extends to the outside of the outer insulation tube (1).

4. The drying tank device for a hydrogen production system according to claim 1, characterized in that: Both the feed port (7) and the discharge port (9) are equipped with pneumatic ball valves, and one end of the feed port (7) and the discharge port (9) is an external thread plug cap structure, with a PTFE gasket embedded in the cap.

5. The drying tank device for a hydrogen production system according to claim 1, characterized in that: The input end of the temperature sensor (11) extends into the interior of the inner stainless steel tube (2).

6. The drying tank device for a hydrogen production system according to claim 1, characterized in that: Both the exhaust port (6) and the air inlet (8) are equipped with sealing caps.

Images