Natural gas hydrogen-doped environment-friendly kiln

Abstract

The utility model relates to the technical field of kilns, and particularly discloses a natural gas hydrogen-doped environment-friendly kiln which comprises a kiln body, a kiln door is arranged at one end of the kiln body, a smoke exhaust pipe communicated with the kiln body is arranged on one side of the kiln body, and a plurality of burners are arranged on the two sides of the kiln body. The plurality of burners are communicated with combustion-supporting air pipelines and gas main pipelines, and the gas main pipelines are communicated with fuel gas hydrogen-doped gas stations; according to the hydrogen-doped natural gas environment-friendly kiln, the hydrogen-doped natural gas is provided for the gas pipeline through the hydrogen-doped gas station, so that the hydrogen-doped natural gas combusts the interior of the kiln body through the multiple burners, the explosion risk caused by pure hydrogen combustion is reduced, emission of harmful substances generated during combustion is further reduced, and the environment-friendly effect is achieved. Therefore, the kiln is more environment-friendly in the production process, and combustion is more sufficient under the connection of the combustion-supporting air pipeline.

Description

Technical Field

[0001] This utility model relates to the technical field of kilns, specifically, to an environmentally friendly natural gas-blended hydrogen kiln. Background Technology

[0002] Currently, in the context of energy transformation in the kiln industry, natural gas is widely used to replace traditional fossil fuels, thanks to its environmental advantages over traditional fossil fuels: it can significantly reduce the emission of harmful substances such as sulfur oxides and nitrogen oxides during use. Hydrogen, compared to natural gas, has even more outstanding environmental performance, representing a clean energy source with zero carbon emissions; its combustion product is only water. However, the practical application of pure hydrogen in kilns faces two challenges: pure hydrogen poses a risk of combustion and explosion, and current technologies cannot guarantee its safe large-scale use; low-concentration hydrogen has low energy conversion efficiency due to insufficient calorific value. Therefore, the kiln industry currently needs a kiln structure that can use natural gas as the primary fuel and blend it with hydrogen. Utility Model Content

[0003] In order to overcome the defects of the existing technology, this utility model provides a natural gas hydrogen-blended environmentally friendly kiln to solve the problems in the existing technology.

[0004] The technical solution adopted by this utility model to solve its technical problem is: a natural gas hydrogen-blended environmentally friendly kiln, including a kiln body, a kiln door is provided at one end of the kiln body, a connected flue pipe is provided on one side of the kiln body, and multiple burners are provided on both sides of the kiln body. The multiple burners are connected to a combustion air pipeline and a gas main pipeline, and the gas main pipeline is connected to a gas hydrogen-blended station.

[0005] In the aforementioned environmentally friendly natural gas-hydrogen blending kiln, the gas-hydrogen blending station includes a gas pipeline and a hydrogen pipeline. One end of the gas pipeline is provided with a gas inlet, and the other end of the gas pipeline is connected to a dynamic mixer. One end of the hydrogen pipeline is provided with a hydrogen inlet, and the other end of the hydrogen pipeline is connected to the dynamic mixer. The output port of the dynamic mixer is connected to a static mixer, and the output end of the static mixer is provided with a natural gas-hydrogen blending output pipe. The main gas pipeline is connected to the natural gas-hydrogen blending output pipe.

[0006] In the aforementioned natural gas-hydrogen blended environmentally friendly kiln, a first vent is connected to the gas pipeline, and a second vent is connected to the hydrogen pipeline. Both the first and second vents are connected to a second flame arrester, and the second flame arrester is connected to a vent pipe.

[0007] In the aforementioned natural gas hydrogen-blended environmentally friendly kiln, a first pressure reducing valve, a first pressure gauge, and a first filter are sequentially arranged on the side of the first vent near the gas inlet. On the other side of the first vent, a first shut-off solenoid valve, a first flow meter, a first flow regulating actuator, a first pressure sensor, and a first one-way check valve are sequentially arranged. A second pressure gauge and a first high-low pressure switch are arranged between the vent and the shut-off solenoid valve.

[0008] In the aforementioned natural gas-hydrogen blended environmentally friendly kiln, a second pressure reducing valve, a second filter, a third pressure gauge, a nitrogen replacement port, and a first flame arrester are sequentially arranged on the side of the second vent near the hydrogen inlet. On the other side of the second vent, a second shut-off solenoid valve, a second flow meter, a second flow regulating actuator, a second pressure sensor, and a second one-way check valve are sequentially arranged. A fourth pressure gauge and a second high and low pressure switch are arranged between the second vent and the second shut-off solenoid valve.

[0009] The beneficial effects of this utility model are that by supplying hydrogen-blended natural gas to the gas pipeline through a gas-blended hydrogen station, the hydrogen-blended natural gas is burned inside the kiln through multiple burners, reducing the risk of explosion caused by pure hydrogen combustion, and further reducing the emission of harmful substances produced during combustion, making the kiln more environmentally friendly during the production process. At the same time, with the connection of the combustion air pipeline, combustion is more complete. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the main structure of the natural gas hydrogen-blended environmentally friendly kiln in this embodiment.

[0011] Figure 2 This is a top view of the structure of the natural gas-hydrogen-blended environmentally friendly kiln in this embodiment.

[0012] Figure 3 This is a schematic diagram of the gas-hydrogen blending station in this embodiment.

[0013] In the diagram: 1. Kiln body; 2. Kiln door; 3. Burner; 4. Exhaust pipe; 5. Combustion air pipeline; 6. Main gas pipeline; 7. Gas-hydrogen blending station; 8. Gas inlet; 9. First filter; 10. First pressure gauge; 11. First pressure reducing valve; 12. First vent; 13. Second pressure gauge; 14. First high / low pressure switch; 15. First shut-off solenoid valve; 16. First flow meter; 17. First flow regulating actuator; 18. First pressure sensor; 19. First one-way check valve; 20. Hydrogen inlet; 21. First flame arrester; 22. Nitrogen replacement port; 23. Third pressure gauge; 24. Second filter; 25. Second pressure reducing valve; 26. Second vent; 27. Second flame arrester; 28. Vent pipe; 29. ​​Fourth pressure gauge; 30. Second high / low pressure switch; 31. Second shut-off solenoid valve; 32. Second flow meter; 33. Second flow regulating actuator; 34. Second pressure sensor; 35. Second one-way check valve; 36. Dynamic mixer; 37. Static mixer; 38. Natural gas-hydrogen blending output pipe. Detailed Implementation

[0014] Combination Figures 1 to 3 The illustration shows a natural gas-hydrogen-blended environmentally friendly kiln, comprising a kiln body 1, a kiln door 2 at one end of the kiln body 1, a flue pipe 4 connected to one side of the kiln body 1, and multiple burners 3 on both sides of the kiln body 1. Each burner 3 is connected to a combustion air duct 5 and a main gas duct 6, which is connected to a hydrogen-blended gas station 7. In this embodiment, the hydrogen-blended gas station 7 supplies hydrogen-blended natural gas to the gas duct 6, allowing the hydrogen-blended natural gas to burn inside the kiln body 1 through the multiple burners 3. This reduces the risk of explosion caused by pure hydrogen combustion and further reduces the emission of harmful substances during combustion, making the kiln more environmentally friendly during production. Furthermore, with the connection of the combustion air duct 5, combustion is more complete.

[0015] Specifically, the gas-hydrogen blending station 7 in this embodiment includes a gas pipeline and a hydrogen pipeline. One end of the gas pipeline has a gas inlet 8, and the other end is connected to a dynamic mixer 36. One end of the hydrogen pipeline has a hydrogen inlet 20, and the other end is connected to the dynamic mixer 36. The output port of the dynamic mixer 36 is connected to a static mixer 37, and the output end of the static mixer 37 has a natural gas-hydrogen blending output pipe 38. The main gas pipeline 6 is connected to the natural gas-hydrogen blending output pipe 38. The dynamic mixer 36 is a Venturi pipe mixer, utilizing the Venturi effect to rapidly mix the two gases. The static mixer 37 is a mixer composed of multiple turbulence units; this structure is existing technology and will not be described further here. Through the dynamic mixer 36 and the static mixer 37, natural gas and hydrogen can be quickly and thoroughly mixed, improving the combustion uniformity of the two gases and reducing the detonation effect produced by hydrogen combustion.

[0016] In this embodiment, a first vent 12 is connected to the gas pipeline, and a second vent 26 is connected to the hydrogen pipeline. Both the first vent 12 and the second vent 26 are connected to a second flame arrester 27, which is connected to a vent pipe 28. The first vent 12 can be used to release air before gas is introduced into the gas pipeline, and the second vent 26 can release nitrogen and air before hydrogen is introduced, and can also serve as a pressure relief function. The first vent 12 and the second vent 26 are both connected to the vent pipe 28, which can reduce the number of connecting pipes in the equipment, thereby reducing costs and space requirements.

[0017] The first vent 12 is equipped with a first pressure reducing valve 11, a first pressure gauge 10, and a first filter 9 on the side near the gas inlet 8. On the other side of the first vent 12, a first shut-off solenoid valve 15, a first flow meter 16, a first flow regulating actuator 17, a first pressure sensor 18, and a first one-way check valve 19 are arranged in sequence. A second pressure gauge 13 and a first high-low pressure switch 14 are arranged between the vent 12 and the shut-off solenoid valve 15, which makes the gas pipeline safer.

[0018] The second vent 26, near the hydrogen inlet 20, is equipped with a second pressure reducing valve 25, a second filter 24, a third pressure gauge 23, a nitrogen replacement port 22, and a first flame arrester 21. The other side of the second vent 26 is equipped with a second shut-off solenoid valve 31, a second flow meter 32, a second flow regulating actuator 33, a second pressure sensor 34, and a second one-way check valve 35. A fourth pressure gauge 29 and a second high / low pressure switch 30 are located between the second vent 26 and the second shut-off solenoid valve 31. This design enhances the safety of the hydrogen pipeline. Furthermore, the natural gas-hydrogen blending output pipe 38 in this embodiment is equipped with a gas composition analyzer, which can detect the blending ratio between natural gas and hydrogen to facilitate adjustment of the hydrogen or natural gas flow rate.

[0019] The embodiments of this utility model have been described in detail above with reference to the accompanying drawings, but this utility model is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of this utility model, and these variations still fall within the protection scope of this utility model.

Claims

1. A natural gas hydrogen blending environment-friendly kiln, comprising a kiln body (1), one end of the kiln body (1) is provided with a kiln door (2), one side of the kiln body (1) is provided with a smoke exhaust pipe (4) connected in communication, characterized in that, The kiln body (1) is provided with a plurality of burners (3) on both sides, a plurality of burners (3) are communicated with combustion air pipeline (5) and gas main pipeline (6), the gas main pipeline (6) is communicated with hydrogen gas station (7).

2. The natural gas hydrogen blending environmentally friendly furnace of claim 1, wherein, The hydrogen gas station (7) includes a gas pipeline and a hydrogen pipeline, one end of the gas pipeline is provided with a gas inlet (8), the other end of the gas pipeline is communicated with a dynamic mixer (36), one end of the hydrogen pipeline is provided with a hydrogen inlet (20), the other end of the hydrogen pipeline is communicated with the dynamic mixer (36), the output port of the dynamic mixer (36) is communicated with a static mixer (37), the output end of the static mixer (37) is provided with a natural gas hydrogen output pipe (38), the gas main pipeline (6) is communicated with the natural gas hydrogen output pipe (38).

3. The natural gas hydrogen blending environmentally friendly furnace of claim 2, wherein, The gas pipeline is communicated with a first diffusion port (12), the hydrogen pipeline is communicated with a second diffusion port (26), the first diffusion port (12) and the second diffusion port (26) are communicated with a second flame arrester (27), the second flame arrester (27) is communicated with a diffusion pipe (28).

4. The natural gas hydrogen blending environmentally friendly furnace of claim 3, wherein, The first diffusion port (12) is provided with a first pressure reducing valve (11), a first pressure gauge (10) and a first filter (9) in sequence on one side close to the gas inlet (8), the other side of the first diffusion port (12) is provided with a first cut-off electromagnetic valve (15), a first flow meter (16), a first flow regulating actuator (17), a first pressure sensor (18) and a first one-way check valve (19) in sequence, and a second pressure gauge (13) and a first high-low pressure switch (14) are arranged between the first diffusion port (12) and the cut-off electromagnetic valve (15).

5. The natural gas hydrogen blending environmentally friendly furnace of claim 3, wherein, The second diffusion port (26) is provided with a second pressure reducing valve (25), a second filter (24), a third pressure gauge (23), a nitrogen displacement port (22) and a first flame arrester (21) in sequence on one side close to the hydrogen inlet (20), the other side of the second diffusion port (26) is provided with a second cut-off electromagnetic valve (31), a second flow meter (32), a second flow regulating actuator (33), a second pressure sensor (34) and a second one-way check valve (35) in sequence, and a fourth pressure gauge (29) and a second high-low pressure switch (30) are arranged between the second diffusion port (26) and the second cut-off electromagnetic valve (31).

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