Anti-explosion hydrogen heater

Abstract

The utility model discloses an anti-explosion hydrogen heater which comprises a furnace body, an anti-explosion box is arranged at one end of the furnace body, a plurality of U-shaped electric heating pipes are installed on the anti-explosion box, one end of the furnace body is connected with a hydrogen inlet pipe and a nitrogen inlet pipe, the other end of the furnace body is connected with a hydrogen outlet pipe and a nitrogen outlet pipe, and a plurality of guide plates are installed in the furnace body. Two adjacent guide plates are respectively connected with the top wall and the bottom wall of the furnace body so as to form an S-shaped channel in the furnace body, the outer wall of the electric heating pipe is sleeved with a first insulation heat conduction sleeve, the outer wall, located between the adjacent guide plates, of the first insulation heat conduction sleeve is fixedly connected with a plurality of radial cooling fins, and the periphery of the cooling fins is sleeved with a second insulation heat conduction sleeve. When the hydrogen concentration in the furnace body is high, hydrogen conveying can be stopped, and nitrogen is conveyed into the furnace body, so that the hydrogen concentration in the furnace body is rapidly reduced, and the explosion risk is reduced.

Description

Technical Field

[0001] This utility model relates to the field of pipeline heater technology, specifically an explosion-proof hydrogen heater. Background Technology

[0002] Hydrogen gas needs to be heated during industrial production. Currently, some methods use flame heating, which is highly prone to explosion; others use electric heating, but electric heating is prone to generating static electricity, which can ignite the hydrogen gas. Moreover, if the hydrogen concentration or temperature inside the furnace is too high, an explosion is also highly likely. Utility Model Content

[0003] To address the shortcomings of existing technologies, this invention provides an explosion-proof hydrogen heater to solve the problem of easy explosion of existing hydrogen heaters mentioned in the background section.

[0004] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0005] An explosion-proof hydrogen heater includes a furnace body. One end of the furnace body is equipped with an explosion-proof box, on which multiple U-shaped electric heating tubes are installed. One end of the furnace body is connected to a hydrogen inlet pipe and a nitrogen inlet pipe, and the other end is connected to a hydrogen outlet pipe and a nitrogen outlet pipe. Multiple guide plates are installed inside the furnace body. Adjacent guide plates are connected to the top and bottom walls of the furnace body, respectively, to form an S-shaped channel inside the furnace body. The outer wall of the electric heating tubes is fitted with a first insulating heat-conducting sleeve. The outer wall of the first insulating heat-conducting sleeve between adjacent guide plates is fixedly connected with several radial heat dissipation fins. The outer periphery of the heat dissipation fins is fitted with a second insulating heat-conducting sleeve.

[0006] Preferably, the furnace body consists of a ceramic layer, a stainless steel layer, and an aluminum alloy layer from the inside out, thereby improving the strength of the furnace body.

[0007] Preferably, each of the hydrogen inlet pipe, hydrogen outlet pipe, nitrogen inlet pipe, and nitrogen outlet pipe is equipped with a solenoid valve to control the opening and closing of each pipe.

[0008] Preferably, both the first insulating heat-conducting sleeve and the second insulating heat-conducting sleeve are made of boron nitride composite material, which has the function of insulation and also has the function of heat conduction.

[0009] Preferably, a hydrogen concentration sensor and a temperature sensor are installed inside the furnace body. The hydrogen concentration sensor is used to detect the concentration of hydrogen inside the furnace body, and the temperature sensor is used to detect the temperature inside the furnace body.

[0010] Compared with the prior art, the present invention has the following beneficial effects:

[0011] Hydrogen gas enters the furnace body through the hydrogen inlet pipe. The electric heating tube operates to heat the hydrogen gas. When the electric heating tube is working, the heat can be transferred to the heat dissipation fins through the first insulating heat-conducting sleeve. The heat dissipation fins then transfer the heat to the hydrogen gas through the second insulating heat-conducting sleeve to heat the hydrogen gas. The first and second insulating heat-conducting sleeves can also separate the hydrogen gas from the electric heating tube, heat dissipation fins and other metal materials to prevent static electricity and reduce the risk of explosion.

[0012] When the hydrogen concentration inside the furnace is high, the supply of hydrogen can be stopped, and nitrogen can be supplied to the furnace to rapidly reduce the hydrogen concentration and decrease the risk of explosion. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2 This is a front sectional view of the heating element;

[0015] Figure 3 This is a side sectional view of the heating element;

[0016] Figure 4 This is a sectional view of the furnace body;

[0017] In the diagram: 1-furnace body, 101-ceramic layer, 102-stainless steel layer, 103-aluminum alloy layer, 2-explosion-proof box, 3-heating tube, 4-hydrogen inlet pipe, 5-nitrogen inlet pipe, 6-hydrogen outlet pipe, 7-nitrogen outlet pipe, 8-guide plate, 9-first insulating heat-conducting sleeve, 10-heat dissipation fins, 11-second insulating heat-conducting sleeve, 12-solenoid valve, 13-hydrogen concentration sensor, 14-temperature sensor. Detailed implementation method:

[0018] 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.

[0019] Example 1

[0020] Please see Figures 1-4An explosion-proof hydrogen heater includes a furnace body 1. One end of the furnace body 1 is provided with an explosion-proof box 2. Multiple U-shaped electric heating tubes 3 are installed on the explosion-proof box 2. One end of the furnace body 1 is connected to a hydrogen inlet pipe 4 and a nitrogen inlet pipe 5, and the other end is connected to a hydrogen outlet pipe 6 and a nitrogen outlet pipe 7. Multiple guide plates 8 are installed inside the furnace body 1. Two adjacent guide plates 8 are respectively connected to the top wall and the bottom wall of the furnace body 1 to form an S-shaped channel inside the furnace body 1. The outer wall of the electric heating tubes 3 is fitted with a first insulating heat-conducting sleeve 9. The outer wall of the first insulating heat-conducting sleeve 9 between adjacent guide plates is fixedly connected with several radial heat dissipation fins 10. The outer periphery of the heat dissipation fins 10 is fitted with a second insulating heat-conducting sleeve 11.

[0021] Both the first insulating thermally conductive sleeve 9 and the second insulating thermally conductive sleeve 11 are made of boron nitride composite material. The boron nitride composite material (h-BN-based) has a formulation of 60 vol% h-BN + 20 vol% AlN + 20% silicone, which can be wound into complex geometries and has excellent thermal conductivity: 25 W / m·K (ASTM D5470), and elongation at break >150% (while maintaining insulation). h-BN, with its extremely anisotropic thermal conductivity and high-temperature insulation stability, is an ideal choice for the explosion-proof design of hydrogen electric heaters, and is particularly suitable for the insulation and thermal conduction of heating elements.

[0022] Solenoid valves 12 are installed on the hydrogen inlet pipe 4, hydrogen outlet pipe 6, nitrogen inlet pipe 5, and nitrogen outlet pipe 7. The opening and closing of the respective pipes can be controlled by the solenoid valves on each pipe.

[0023] The furnace body 1 is equipped with a hydrogen concentration sensor 13 and a temperature sensor 14. The hydrogen concentration sensor 13 employs tunable diode laser absorption spectroscopy (TDLAS), a high-precision gas detection technology based on molecular selective absorption spectroscopy. Its core principle is to achieve quantitative analysis of hydrogen concentration by scanning the absorption spectrum of a specific gas using a laser wavelength. The temperature sensor 14 is used to detect the temperature inside the furnace body to prevent overheating.

[0024] This embodiment also requires a control cabinet, which contains a controller to receive signals from the hydrogen concentration sensor 13 and the temperature sensor 14, and to control the operation of the solenoid valve and the heating element.

[0025] The working principle of this embodiment is as follows: Connect the hydrogen inlet pipe 4 to the hydrogen source and the nitrogen inlet pipe 5 to the nitrogen source. Open the solenoid valve 12 on the hydrogen inlet pipe 4 and the hydrogen outlet pipe 6, and close the solenoid valve on the nitrogen inlet pipe 5 and the nitrogen outlet pipe 7. Hydrogen enters the furnace body 1 through the hydrogen inlet pipe 4. The electric heating tube 3 works to heat the hydrogen. When the electric heating tube 3 works, the heat is transferred to the heat dissipation fins 10 through the action of the first insulating heat-conducting sleeve 9. The heat dissipation fins 10 transfer the heat to the hydrogen through the second insulating heat-conducting sleeve 11. The hydrogen then flows along the gap between adjacent heat dissipation fins 10. After passing through the guide plate 8, it flows in an S-shape in the furnace body 1 to heat the hydrogen. Through the action of the first insulating heat-conducting sleeve 9 and the second insulating heat-conducting sleeve 11, the hydrogen can be separated from the electric heating tube, heat dissipation fins and other metal materials to prevent static electricity and reduce the risk of explosion.

[0026] When the hydrogen concentration inside furnace 1 is high, the hydrogen concentration sensor transmits a signal to the controller. The controller then closes the solenoid valves on the hydrogen inlet and outlet pipes and opens the solenoid valves on the nitrogen inlet and outlet pipes, thereby supplying nitrogen into the furnace and reducing the hydrogen concentration, thus lowering the risk of explosion.

[0027] When the temperature inside the furnace body 1 is too high, the temperature sensor transmits a signal to the controller, which then reduces the number of heating elements in operation to decrease heat generation and prevent the temperature from becoming too high.

[0028] Example 2

[0029] Based on Example 1, the furnace body 1 consists of a ceramic layer 101, a stainless steel layer 102, and an aluminum alloy layer 103 from the inside out. The stainless steel layer is made of 316L stainless steel and has undergone hydrogen embrittlement treatment. The ceramic layer has the function of heat preservation and insulation. The aluminum alloy layer is an aluminum alloy shell with explosion relief grooves, and the explosion pressure is set to 8MPa.

[0030] It should be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An explosion-proof hydrogen heater, characterized by: The furnace includes a furnace body (1), one end of which is equipped with an explosion-proof box (2), and multiple U-shaped electric heating tubes (3) are installed on the explosion-proof box (2). One end of the furnace body (1) is connected to a hydrogen inlet pipe (4) and a nitrogen inlet pipe (5), and the other end is connected to a hydrogen outlet pipe (6) and a nitrogen outlet pipe (7). Multiple guide plates (8) are installed inside the furnace body (1). Two adjacent guide plates (8) are connected to the top wall and bottom wall of the furnace body (1) respectively to form an S-shaped channel inside the furnace body (1). The outer wall of the electric heating tubes (3) is fitted with a first insulating heat-conducting sleeve (9). The outer wall of the first insulating heat-conducting sleeve (9) between adjacent guide plates is fixedly connected with several radial heat dissipation fins (10). The outer periphery of the heat dissipation fins (10) is fitted with a second insulating heat-conducting sleeve (11).

2. The explosion-proof hydrogen gas heater according to claim 1, characterized by: The furnace body (1) consists of a ceramic layer (101), a stainless steel layer (102), and an aluminum alloy layer (103) from the inside out.

3. The explosion-proof hydrogen gas heater according to claim 2, wherein: Solenoid valves (12) are installed on the hydrogen inlet pipe (4), hydrogen outlet pipe (6), nitrogen inlet pipe (5), and nitrogen outlet pipe (7).

4. The explosion-proof hydrogen gas heater according to claim 3, wherein: Both the first insulating heat-conducting sleeve (9) and the second insulating heat-conducting sleeve (11) are made of boron nitride composite material.

5. The explosion-proof hydrogen gas heater of claim 4, wherein: The furnace body (1) is equipped with a hydrogen concentration sensor (13) and a temperature sensor (14).

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