Purification tower for hydrogen preparation

Abstract

The utility model belongs to the technical field of hydrogen purification towers, and particularly relates to a purification tower for hydrogen preparation, which comprises a tower body, a first shield and a second shield, the tower body is respectively provided with a gas inlet and a gas outlet, and the outer ends of the gas inlet and the gas outlet are connected with external pipes. The first protective cover and the second protective cover are sleeved at the joint of the air inlet or the air outlet and the external pipe; the first protective cover and the second protective cover are arranged outside the pipeline connecting position in a sleeving mode, then through circulation of the circulation fan and monitoring of the hydrogen detection alarm instrument, leakage conditions at any position of the connecting position can be monitored in time under the action of the circulation fan and cannot be affected by external airflow, the monitoring reliability is improved, and the safety of the pipeline is guaranteed. And secondly, the hydrogen detection alarm apparatus is arranged to be of a turnover structure through the sealing cover, so that the hydrogen detection alarm apparatus can be conveniently overhauled and maintained in the use process of the hydrogen detection alarm apparatus provided by the utility model.

Description

Technical Field

[0001] The utility model belongs to the technical field of hydrogen purification towers, and particularly relates to a purification tower for hydrogen preparation. Background Technique

[0002] Hydrogen purification towers are widely used in various occasions that require high-purity hydrogen, including industrial sectors such as petrochemical, electronics, metallurgy, machinery, food processing, float glass, high-purity materials, and optoelectronic materials. In these fields, high-purity hydrogen is used as a protective gas, reaction gas, or fuel, etc.

[0003] The purification tower for hydrogen preparation is a key component in the hydrogen purification device, which is used to further improve the purity of hydrogen and reduce the impurity content; the hydrogen purification device usually consists of a hydrogen adsorber, a hydrogen purification tower, a hydrogen delivery system, a cooling system, and a control system, etc. Among them, the hydrogen purification tower is one of the core components, which uses specific adsorbents or catalysts to remove impurities in hydrogen.

[0004] The working principle of the hydrogen purification tower usually involves processes such as adsorption, chemical reaction, or membrane separation. For example, in the adsorption process, the adsorbent in the purification tower will adsorb impurity molecules in hydrogen, such as oxygen, nitrogen, water vapor, etc., thereby improving the purity of hydrogen. When the adsorbent is saturated, it can be regenerated by heating or depressurizing, etc., to restore its adsorption capacity.

[0005] There is a risk of hydrogen leakage in the connecting pipe of the hydrogen purification tower. Hydrogen is colorless, odorless, tasteless, and non-toxic. It is difficult for workers to detect after leakage. However, its explosion limit in the air is 4.0% - 74.8%. Once leaked and encountered a fire source or electric spark, it is extremely easy to trigger an explosion accident. At the same time, the leaked hydrogen may also quickly spread and form a combustible gas mixture with air, resulting in the continuous expansion of the combustible and explosive areas. In addition, high-concentration hydrogen will reduce the oxygen content in the air, causing an asphyxiation risk.

[0006] In the prior art, fixed hydrogen detection and alarm devices are used for detection. The hydrogen purification towers used in industry are relatively large, and the diameters of the inlet and exhaust pipes are also large. However, the installation position of the fixed hydrogen detection and alarm device is fixed, and the covered space is limited. When the gas flowability in the detected range is poor, or due to the wind direction problem, the leaked gas diffuses to the side away from the alarm device, accurate monitoring cannot be achieved, and thus potential safety hazards are generated.

[0007] To solve the above problems, a purification tower for hydrogen preparation is proposed in this application. Utility Model Content

[0008] The purpose of the utility model is to provide a purification tower for hydrogen preparation, which solves the problems proposed in the above background technique.

[0009] In order to solve the above technical problems, the utility model is realized by the following technical solutions:

[0010] The utility model is a purification tower for hydrogen preparation, comprising a tower body, wherein an air inlet and an air outlet are respectively arranged on the tower body, wherein the outer ends of the air inlet and the air outlet are connected with an external pipe, and further comprising a first protective cover and a second protective cover hinged at one end, wherein the first protective cover and the second protective cover are sleeved at the connection between the air inlet or the air outlet and the external pipe, and the first protective cover and the second protective cover form an annular closed cavity with the outside of the pipeline, a circulation fan for driving the circulation of the cavity gas is arranged in the first protective cover, and a flippable hydrogen detection alarm is connected in the cavity.

[0011] Furthermore, a sealing cover with a hinged end is provided on the upper end of the first shield, and the other end of the sealing cover is coupled to the first shield. The hydrogen detection alarm is fixedly mounted on the sealing cover and the detection head is located in the circulation cavity.

[0012] Furthermore, a drainage channel is formed in the first shield, and the circulation fan is fixed in the drainage channel along the air flow direction of the cavity. A drainage seat and a drainage block are also fixed in the drainage channel respectively.

[0013] Furthermore, the circulation fan drives the cavity airflow to flow from the drainage channel along the first shield and the second shield, and then passes through the guide seat and the guide block and continues to circulate under the action of the circulation fan. The air outlet formed by the guide seat and the guide block faces the detection head of the hydrogen detection alarm.

[0014] Furthermore, a positioning block supported on the outside of the connection between the air inlet or the air outlet and the external pipe is fixed on the inner side of the first shield and the second shield.

[0015] Furthermore, a groove for the pipeline to pass through is provided at the joint between the first shield and the second shield, and a sealing ring is integrally formed on the outer side of the connection between the first shield, the second shield and the pipeline.

[0016] Furthermore, the first shield and the second shield are both fixed with fixing ears at one end away from the hinge, and the two fixing ears are locked by bolts to close the first shield and the second shield.

[0017] The utility model has the following beneficial effects:

[0018] The utility model forms a recyclable channel after arranging the first protective cover and the second protective cover which can be opened and closed and wrapping the pipeline connection part with them. Then, a circulation fan and a hydrogen detection alarm are installed in the channel. The circulation fan serves the purpose of circulation, and the hydrogen detection alarm detects the circulating gas in real time. No matter where there is a leakage in the pipeline connection, it can be detected by the hydrogen detection alarm in time through the circulating gas, thereby improving the reliability and avoiding the generation of leakage safety hazards.

[0019] The utility model arranges a sealing cover and installs the hydrogen detection alarm on its upper end. The sealing cover can be opened independently, which is convenient for the maintenance and repair of the hydrogen detection alarm, and improves the use convenience while ensuring reliable monitoring.

[0020] Of course, it is not necessary for any product implementing the utility model to achieve all the above-mentioned advantages simultaneously. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0022] Figure 1 is a schematic diagram of the overall appearance structure of the present utility model;

[0023] Figure 2 is Figure 1 a schematic diagram of the partial decomposed structure;

[0024] Figure 3 is a schematic diagram of the half-sectional structure after the protective cover is connected to the pipeline;

[0025] Figure 4 is Figure 1 a schematic diagram of the open state of the first protective sheath and the second protective sheath in ;

[0026] Figure 5 is Figure 1 a schematic diagram of the open state of the sealing cover on the first protective sheath in ;

[0027] In the drawings, the list of components represented by each reference numeral is as follows:

[0028] In the figure: 1, tower body; 11, air inlet; 12, air outlet; 2, external connecting pipe; 3, first protective cover; 31, drainage channel; 32, diversion seat; 33, diversion block; 4, second protective cover; 5, positioning block; 6, circulation fan; 7, sealing cover; 8, hydrogen detection alarm; 9, sealing ring; 10, fixing ear. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] Next, in conjunction with the accompanying drawings in the embodiments of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0030] In the description of the present invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "periphery", etc. indicating the orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention.

[0031] Please refer to Figures 1-5 As shown, the present invention is a purification tower for hydrogen production, including a tower body 1. An air inlet 11 and an air outlet 12 are respectively arranged on the tower body 1. An outer connecting pipe 2 is connected to the outer ends of the air inlet 11 and the air outlet 12. It also includes a first shield 3 and a second shield 4 hinged at one end. The first shield 3 and the second shield 4 are sleeved at the connection between the air inlet 11 or the air outlet 12 and the outer connecting pipe 2, and an annular closed cavity is formed between the first shield 3 and the second shield 4 and the outside of the pipeline. A circulation fan 6 for driving the gas in the cavity to circulate is arranged in the first shield 3, and a reversible hydrogen detection alarm 8 is connected in the cavity.

[0032] Among them, the upper end of the first shield 3 is provided with a sealing cover 7 hinged at one end. The other end of the sealing cover 7 is coupled to the first shield 3. The hydrogen detection alarm 8 is fixedly installed on the sealing cover 7 and the detection head is located in the circulation cavity. In this embodiment, an opening matching the sealing cover 7 is formed on the first shield 3. The sealing cover 7 is hermetically connected while being hinged at the opening, and the other hinged end can be locked by bolts, buckles, etc.

[0033] Among them, a drainage channel 31 is formed in the first shield 3. The circulation fan 6 is fixed in the drainage channel 31 along the air flow direction of the cavity. A diversion seat 32 and a diversion block 33 are also respectively fixed in the drainage channel 31. The circulation fan 6 drives the air flow in the cavity to flow along the first shield 3 and the second shield 4 through the drainage channel 31, and then continues to circulate under the action of the circulation fan 6 through the diversion seat 32 and the diversion block 33. The air outlet formed by the diversion seat 32 and the diversion block 33 is directly opposite to the detection head of the hydrogen detection alarm 8. In this embodiment, the arranged diversion seat 32 and diversion block 33 can accurately pass the circulating air flow through the detection head of the hydrogen detection alarm 8, so as to detect the gas in the entire cavity, with higher accuracy and reliability, and a simple structure.

[0034] Wherein, positioning blocks 5 are fixedly arranged inside both the first shield 3 and the second shield 4 to support the outside of the connection between the air inlet 11 or the air outlet 12 and the external connection pipe 2. In this embodiment, the positioning blocks 5 are provided to ensure that the first shield 3 and the second shield 4 are in the middle position at the connection between the air inlet 11 or the air outlet 12 and the external connection pipe 2, ensure the complete circulation of the air flow, ensure the monitoring accuracy, and facilitate the installation at the same time.

[0035] Wherein, a shaped groove for the pipeline to pass through is provided at the butt joint of the first shield 3 and the second shield 4, and a sealing ring 9 is integrally formed on the outside of the connection between the first shield 3, the second shield 4 and the pipeline. In this embodiment, the shaped grooves on the first shield 3 and the second shield 4 are sleeved outside the pipeline, and then the sealing is strengthened by the sealing ring 9.

[0036] Wherein, fixed ears 10 are fixedly arranged at the ends of the first shield 3 and the second shield 4 away from the hinge. The two fixed ears 10 are locked by bolts to close the first shield 3 and the second shield 4. In this embodiment, the cooperation of the fixed ears 10 and the bolts can also be locked by clamping or the like. It is necessary to ensure the fitting of the contact surfaces of the first shield 3 and the second shield 4, and the sealing ring 9 also needs to be in contact with the pipeline. Sealing members can be arranged on the contact surfaces of the first shield 3, the second shield 4 and the contact surfaces of the sealing ring 9 and the pipeline to make the monitoring more accurate.

[0037] It can be understood that, first, the first shield and the second shield are sleeved outside the pipeline connection. Then, through the circulation of the circulation fan and the monitoring of the hydrogen detection alarm, no matter where there is a leakage at the connection, it can be detected in time under the action of the circulation fan and will not be affected by the external air flow, improving the monitoring reliability and avoiding the occurrence of potential safety hazards. Secondly, the hydrogen detection alarm is set as a flip structure through the sealing cover, which is convenient for the maintenance and repair of the hydrogen detection alarm during the use of the present utility model.

[0038] A specific application of this embodiment is as follows: The corresponding air inlet 11 or air outlet 12 is docked with the external connection pipe 2 by means of bolts, clamping, etc. The first shield 3 is sleeved outside the pipeline connection, and the positioning block 5 is docked with the flange outer ring to position the first shield 3. The hydrogen detection alarm 8 is adjusted to a convenient observation position by rotating on the pipeline. Then, the second shield 4 is docked with the pipeline connection. At this time, the second shield 4 also forms a closed loop with the first shield 3. The fixed ears 10 on the first shield 3 and the second shield 4 are locked by bolts, and the sealing ring 9 is attached to the outside of the corresponding pipeline to form a seal. At this time, a closed loop is formed between the first shield 3, the second shield 4 and the pipeline connection;

[0039] The start and stop of the circulation fan 6 and the hydrogen detection alarm 8 are synchronized with the working state of the tower body 1, and the three are turned on or off simultaneously. After the circulation fan 6 is turned on, the air flow circulates along the channel formed between the first shield 3, the second shield 4 and the pipeline. The air flow enters the first shield 3 through the circulation fan 6 and surrounds the second shield 4, and then passes the air flow through the induction end of the hydrogen detection alarm 8 through the diversion seat 32 and the diversion block 33, and then continues to circulate through the diversion channel 31 and the circulation fan 6.

[0040] In the description of this specification, the description with reference to terms such as "one embodiment", "example", "specific example", 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 invention. In this specification, the schematic representations 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 any one or more embodiments or examples in a suitable manner.

[0041] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the present invention to the specific embodiments described. Obviously, many modifications and changes can be made according to the content of this specification. These embodiments are selected and specifically described in this specification to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and utilize the present invention well. The present invention is only limited by the claims and their full scope and equivalents.

Claims

1. A purification tower for preparing hydrogen, comprising a tower body (1), wherein the tower body (1) is provided with an air inlet (11) and an air outlet (12), respectively, and the outer ends of the air inlet (11) and the air outlet (12) are connected to an external pipe (2), characterized in that: The invention also comprises a first protective cover (3) and a second protective cover (4) hinged at one end, wherein the first protective cover (3) and the second protective cover (4) are fitted at the connection between the air inlet (11) or the air outlet (12) and the external pipe (2), and the first protective cover (3) and the second protective cover (4) form an annular closed cavity with the outside of the pipe, and the first protective cover (3) and the second protective cover (4) are provided in the first protective cover (3) for driving the circulation of the cavity gas, and a reversible hydrogen detection alarm (8) is connected in the cavity.

2. A purification tower for hydrogen production according to claim 1, characterized in that: A sealing cover (7) having one end being hinged is provided at the upper end of the first protective cover (3); the other end of the sealing cover (7) is coupled to the first protective cover (3); the hydrogen gas detection alarm (8) is fixedly mounted on the sealing cover (7) and the detection head is located in the circulation cavity.

3. A purification tower for preparing hydrogen according to claim 2, characterized in that: A flow channel (31) is formed in the first shield (3), the circulation fan (6) is fixed in the flow channel (31) along the airflow direction of the cavity, and a flow guide seat (32) and a flow guide block (33) are also respectively fixed in the flow channel (31).

4. A purification tower for preparing hydrogen according to claim 3, characterized in that: The circulation fan (6) drives the cavity airflow to flow from the drainage channel (31) along the first protective cover (3) and the second protective cover (4), and then passes through the guide seat (32) and the guide block (33) and continues to circulate under the action of the circulation fan (6). The air outlet formed by the guide seat (32) and the guide block (33) faces the detection head of the hydrogen detection alarm (8).

5. A purification tower for preparing hydrogen according to claim 1, characterized in that: A positioning block (5) supported outside the connection between the air inlet (11) or the air outlet (12) and the external pipe (2) is fixed on the inner side of both the first protective cover (3) and the second protective cover (4).

6. A purification tower for preparing hydrogen according to claim 1, characterized in that: A groove for the pipeline to pass through is provided at the joint between the first protective cover (3) and the second protective cover (4), and a sealing ring (9) is integrally formed on the outer side of the connection between the first protective cover (3), the second protective cover (4) and the pipeline.

7. A purification tower for preparing hydrogen according to claim 1, characterized in that: The first shield (3) and the second shield (4) are both fixedly provided with fixing ears (10) at one end away from the hinge, and the two fixing ears (10) are locked by bolts to close the first shield (3) and the second shield (4).

Images