Explosion-proof heat exchange device of hydrogen burner

Abstract

The utility model provides a hydrogen burner explosion-proof heat exchange device which comprises a combustion furnace, the waste output end of the combustion furnace is connected with a waste gas conveying box, a first conveying baffle and a second conveying baffle are fixedly connected in the waste gas conveying box, and the upper surface of the waste gas conveying box is connected with a hydrogen recovery assembly. The outer side of the waste gas conveying box is sleeved with a gas inlet heat exchange assembly, one end of the waste gas conveying box is fixedly connected with a waste gas inlet, the waste gas inlet is communicated with the combustion furnace, and the other end of the waste gas conveying box is fixedly connected with a waste gas outlet. Hydrogen in waste gas can be collected through the arranged hydrogen recycling assembly, the hydrogen in the waste gas is reduced, recycling of the hydrogen in the waste gas is achieved, air input into the combustion furnace can be preheated in advance through the arranged air inlet heat exchange assembly, the combustion temperature in the combustion furnace is guaranteed, and heat carried by the waste gas in the waste gas conveying box is effectively utilized.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of waste gas treatment of combustion furnace, specifically speaking, relate to a hydrogen combustor explosion -proof heat exchange device. BACKGROUND

[0002] Methanol is widely sourced, and the production process is mature, mainly from coal chemical industry and natural gas synthesis, can utilize coal, natural gas, coal bed gas, biomass etc. make, under the condition of high temperature and sufficient air, methanol is completely combusted to generate carbon dioxide and water, however, methanol combustion can also produce pollutants such as formaldehyde, nitrogen oxides, further purification treatment is also needed.

[0003] The generated waste gas will be accompanied by unburned hydrogen, and the unburned hydrogen will cause waste in the waste gas, if according to the principle that hydrogen is lighter than air, hydrogen will be stored above the waste gas output channel, but the high-temperature waste gas and hydrogen with a certain concentration will cause explosion, which is dangerous, the waste gas in the waste gas output channel remains a large amount of heat, and if the heat is only dissipated by air, it will cause waste of heat, and when starting, a part of hydrogen is not burned, and a small part of hydrogen is discharged into the waste gas conveying box and remains in the upper end, and if it is not discharged, it will explode. UTILITY MODEL CONTENT

[0004] The utility model discloses a hydrogen combustor explosion -proof heat exchange device that can treat the residual hydrogen in waste gas and effectively utilize the heat generated by waste gas.

[0005] The utility model discloses a hydrogen combustor explosion -proof heat exchange device that can treat the residual hydrogen in waste gas and effectively utilize the heat generated by waste gas.

[0006] A hydrogen combustor explosion -proof heat exchange device, including combustion furnace, its characterized in that: the waste output end of the combustion furnace is connected with waste gas conveying box, first conveying baffle and second conveying baffle are fixedly connected in the waste gas conveying box, hydrogen recovery assembly is connected on the upper surface of the waste gas conveying box, the waste gas conveying box is sleeved with air inlet heat exchange assembly outside, one end of the waste gas conveying box is fixedly connected with waste gas inlet, the waste gas inlet is communicated with the combustion furnace, the other end of the waste gas conveying box is fixedly connected with waste gas outlet.

[0007] As an improvement: the hydrogen recovery assembly includes a hydrogen gas conveying pipe, and a hydrogen gas supply pump is fixedly connected to the hydrogen gas conveying pipe to provide power for conveying hydrogen gas.

[0008] As an improvement: a hydrogen concentration detection sensor for monitoring hydrogen concentration is fixedly connected in the waste gas conveying box, the hydrogen concentration detection sensor is arranged above the first conveying baffle, and the hydrogen concentration detection sensor is electrically connected with the hydrogen gas supply pump.

[0009] As an improvement: the air intake heat exchange assembly comprises a heat exchange sleeve, the heat exchange sleeve is fixedly connected with the waste gas conveying box, air intake pipes are fixedly connected on the side surface of the heat exchange sleeve, and air conveying fans are fixedly connected on the air intake pipes.

[0010] As an improvement: two air supply pipes are fixedly connected on the upper surface of the heat exchange sleeve, air supply pipe connecting flanges are fixedly connected on the other ends of the two air supply pipes, and the two air supply pipes are fixedly connected with the air inlet end of the combustion furnace through the air supply pipe connecting flanges.

[0011] As an improvement: the first conveying baffle is fixedly connected with the inner bottom plate of the waste gas conveying box, and the second conveying baffle is fixedly connected with the inner top plate of the waste gas conveying box.

[0012] Compared with the prior art, the utility model has the following advantages due to the adoption of the above technical scheme:

[0013] The hydrogen recovery assembly can collect hydrogen in the waste gas, the hydrogen concentration detection sensor is used for monitoring the hydrogen concentration, when the hydrogen concentration reaches a certain degree, the hydrogen gas supply pump is controlled to convey the hydrogen in the hydrogen conveying pipe, so that the hydrogen in the waste gas is reduced, when the hydrogen concentration detection sensor detects that the hydrogen concentration is too low, the hydrogen gas supply pump is closed, the hydrogen concentration is controlled through the hydrogen gas supply pump, the safety hazard of hydrogen explosion is avoided, a part of hydrogen is not burned out at the upper end of the waste gas conveying box when starting, and a small part of hydrogen is discharged into the upper end of the waste gas conveying box and remains, otherwise, the hydrogen will explode, a hole is opened in each interval section of the waste gas conveying box, the remaining hydrogen is discharged, so that the explosion is avoided, the hydrogen in the waste gas is recovered, the air intake heat exchange assembly can preheat the air input into the combustion furnace, the combustion temperature in the combustion furnace is ensured, and the heat carried by the waste gas in the waste gas conveying box is effectively utilized. BRIEF DESCRIPTION OF DRAWINGS

[0014] Fig. 1 It is the use state structure schematic diagram of the utility model.

[0015] Fig. 2 It is the three-dimensional structure schematic diagram of the utility model.

[0016] Fig. 3 It is Fig. 2 The side sectional structure schematic diagram of

[0017] Fig. 4 It is Fig. 2A side cross-sectional view of the central air intake heat exchange assembly.

[0018] In the diagram: 1. Combustion furnace; 2. Exhaust gas conveying box; 3. First conveying baffle; 4. Second conveying baffle; 5. Hydrogen recovery assembly; 51. Hydrogen concentration detection sensor; 52. Hydrogen conveying pipe; 53. Hydrogen supply pump; 6. Exhaust gas outlet; 7. Exhaust gas inlet; 8. Inlet heat exchange assembly; 81. Heat exchange sleeve; 82. Air inlet pipe; 83. Air conveying fan; 84. Air supply pipe; 85. Air supply pipe connecting flange. Detailed Implementation

[0019] Example: As attached Figs. 1 to 4 As shown, an explosion-proof heat exchange device for a hydrogen burner includes a combustion furnace 1. The waste output end of the combustion furnace 1 is connected to a waste gas conveying box 2. A first conveying baffle 3 and a second conveying baffle 4 are fixedly connected inside the waste gas conveying box 2. A hydrogen recovery component 5 is connected to the upper surface of the waste gas conveying box 2. An air inlet heat exchange component 8 is fitted on the outside of the waste gas conveying box 2. A waste gas inlet 7 is fixedly connected to one end of the waste gas conveying box 2 and is connected to the combustion furnace 1. A waste gas outlet 6 is fixedly connected to the other end of the waste gas conveying box 2.

[0020] When the machine is turned on, some hydrogen gas is not completely burned and a small amount of hydrogen gas is discharged into the upper part of the exhaust gas conveying box 2. If it is not discharged, it will explode. A hole is opened in each interval of the exhaust gas conveying box 2 to discharge the stored hydrogen gas, so that it will not explode.

[0021] The hydrogen recovery assembly 5 includes a hydrogen delivery pipe 52, on which a hydrogen supply pump 53 is fixedly connected for providing power for the delivery of hydrogen. The hydrogen delivery pipe 52 enables the delivery of hydrogen from the exhaust gas, and the hydrogen supply pump 53 ensures smooth hydrogen delivery.

[0022] A hydrogen concentration sensor 51 for monitoring hydrogen concentration is fixedly connected inside the waste gas conveying box 2. The hydrogen concentration sensor 51 is located above the first conveying baffle 3 and is electrically connected to the hydrogen supply pump 53. The hydrogen concentration sensor 51 monitors the hydrogen concentration. When the hydrogen concentration reaches a certain level, the hydrogen supply pump 53 is controlled to deliver hydrogen from the hydrogen conveying pipe 52, thereby reducing the hydrogen concentration in the waste gas. When the hydrogen concentration sensor 51 detects that the hydrogen concentration is too low, the hydrogen supply pump 53 is shut off, thus recovering hydrogen from the waste gas.

[0023] The air intake heat exchange assembly 8 comprises a heat exchange sleeve 81 fixedly connected with the waste gas conveying box 2, an air intake pipe 82 fixedly connected on the side surface of the heat exchange sleeve 81, and an air conveying fan 83 fixedly connected on the air intake pipe 82. The air conveying fan 83 is arranged to convey external air to the heat exchange sleeve 81.

[0024] Two air supply pipes 84 are fixedly connected on the upper surface of the heat exchange sleeve 81, and a supply pipe connecting flange 85 is fixedly connected on the other end of the two air supply pipes 84. The two air supply pipes 84 are fixedly connected with the air intake end of the combustion furnace 1 through the supply pipe connecting flange 85. The preheated air is input into the combustion furnace 1 through the air supply pipes 84, and the supply pipe connecting flange 85 is arranged to facilitate the sealing connection with the combustion furnace 1, thereby ensuring the stability of air input.

[0025] The first conveying baffle 3 is fixedly connected with the inner bottom plate of the waste gas conveying box 2, and the second conveying baffle 4 is fixedly connected with the inner top plate of the waste gas conveying box 2. The first conveying baffle 3 and the second conveying baffle 4 form an S-shaped conveying channel in the waste gas conveying box 2. When the waste gas is conveyed above the first conveying baffle 3, the hydrogen gas will accumulate due to its own gravity, thereby realizing the recovery of hydrogen gas.

[0026] A space for collecting hydrogen gas is arranged above the first conveying baffle 3. The hydrogen gas will accumulate in this space due to its lighter specific gravity than air and waste gas. The waste gas conveying box 2 and the second conveying baffle 4 serve to prevent the accumulation of hydrogen gas. However, as the waste gas is continuously discharged, the concentration of hydrogen gas accumulated in this space will become higher and higher. Since the waste gas has a high temperature, when the concentration of hydrogen gas reaches a certain level, the hydrogen gas will burn and explode due to the high temperature, causing a safety hazard. Therefore, when the hydrogen gas concentration detection sensor 51 detects that the concentration of hydrogen gas reaches a certain level, the hydrogen gas supply pump 53 will be controlled to pump away the hydrogen gas in this space, thereby reducing the concentration of hydrogen gas and preventing the hydrogen gas from burning and exploding, thereby reducing the safety risk. When the concentration of hydrogen gas is reduced to a certain value, the hydrogen gas supply pump 53 is closed to prevent the generated waste gas from flowing back to the combustion furnace 1 along with the hydrogen gas, thereby affecting the combustion efficiency in the combustion furnace 1.

Claims

1. An explosion-proof heat exchange device for a hydrogen burner, comprising a combustion furnace (1), characterized in that: The waste output end of the combustion furnace (1) shown is connected to a waste gas conveying box (2). A first conveying baffle (3) and a second conveying baffle (4) are fixedly connected inside the waste gas conveying box (2). A hydrogen recovery component (5) is connected to the upper surface of the waste gas conveying box (2). An air inlet heat exchange component (8) is fitted on the outside of the waste gas conveying box (2). A waste gas inlet (7) is fixedly connected to one end of the waste gas conveying box (2). The waste gas inlet (7) is connected to the combustion furnace (1). A waste gas outlet (6) is fixedly connected to the other end of the waste gas conveying box (2).

2. The explosion-proof heat exchange device for a hydrogen burner according to claim 1, characterized in that: The hydrogen recovery assembly (5) includes a hydrogen delivery pipe (52), on which a hydrogen supply pump (53) for providing power for the delivery of hydrogen is fixedly connected.

3. The explosion-proof heat exchange device for a hydrogen burner according to claim 2, characterized in that: The waste gas conveying box (2) is fixedly connected to a hydrogen concentration detection sensor (51) for monitoring hydrogen concentration. The hydrogen concentration detection sensor (51) is located above the first conveying baffle (3) and is electrically connected to the hydrogen supply pump (53).

4. The explosion-proof heat exchange device for a hydrogen burner according to claim 1, characterized in that: The air intake heat exchange assembly (8) includes a heat exchange sleeve (81), which is fixedly connected to the exhaust gas conveying box (2). An air intake pipe (82) is fixedly connected to the side of the heat exchange sleeve (81), and an air conveying fan (83) is fixedly connected to the air intake pipe (82).

5. The explosion-proof heat exchange device for a hydrogen burner according to claim 4, characterized in that: Two air supply pipes (84) are fixedly connected to the upper surface of the heat exchange sleeve (81). The other end of the two air supply pipes (84) is fixedly connected to an air supply pipe connecting flange (85). The two air supply pipes (84) are fixedly connected to the air inlet of the combustion furnace (1) through the air supply pipe connecting flange (85).

6. The explosion-proof heat exchange device for a hydrogen burner according to claim 1, characterized in that: The first conveying baffle (3) is fixedly connected to the bottom plate of the waste gas conveying box (2), and the second conveying baffle (4) is fixedly connected to the top plate of the waste gas conveying box (2).

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