Oxyhydrogen burner for SOEC

Abstract

The utility model discloses an oxyhydrogen burner for SOEC, which comprises a cylindrical steam generating device, and the outer wall of the steam generating device is connected with a pure water inlet pipeline and a steam outlet pipeline; a cylinder is sleeved with the steam generating device, the bottom of the cylinder is close to the bottom of the steam generating device, the lowest end of the cylinder is connected with an outlet pipeline, and the outlet pipeline protrudes out of the lower end of the steam generating device. The outer wall of the cylinder body is connected with a flame detection opening; a hydrogen inlet pipeline and an oxygen inlet pipeline are inserted above the outer wall of the barrel; a flame holder, a catalytic grating and a premixing device are arranged in the barrel. Fuel and air can be evenly mixed, combustion is sufficient, and the heat utilization rate is increased.

Description

Technical Field

[0001] The utility model belongs to the technical field of hydrogen-oxygen burners, in particular to an hydrogen-oxygen burner used for SOEC. Background Art

[0002] SOEC is a device that can decompose water into hydrogen and oxygen through electrochemical reactions under high temperature conditions. Compared with traditional water electrolysis technology, SOEC has a higher energy conversion efficiency, reaching 85% to 95%, and can work in conjunction with high-temperature heat sources to achieve efficient energy utilization.

[0003] The efficient operation of the SOEC system relies on a stable, high-temperature heat source. The burner's role here is to provide or assist in providing this heat energy, ensuring that the SOEC can continuously operate within the optimal operating temperature range. Therefore, this burner is designed to efficiently and stably convert chemical energy into thermal energy and effectively transfer this heat energy to the SOEC system.

[0004] Considering that the SOEC system may be deployed in a variety of environments, the burner needs to be designed to adapt to a variety of fuel types, including but not limited to natural gas, biomass gas, hydrogen or synthesis gas, to improve the flexibility and applicability of the system; to further improve the overall efficiency of the system, the burner design integrates an efficient heat recovery mechanism to recover the waste heat generated by combustion through the heat exchanger of the SOEC system. This waste heat can be used to preheat the feed water or other system components, reducing energy waste.

[0005] The existing oxyhydrogen burners used for SOEC have uneven mixing of fuel and air, incomplete combustion and low heat utilization rate. Utility Model Content

[0006] The utility model aims to provide an oxyhydrogen burner for SOEC, which can mix fuel and air evenly, burn fully and have high heat utilization rate.

[0007] To achieve the above-mentioned objectives, the utility model provides an oxyhydrogen burner for SOEC, comprising a cylindrical steam generator, the outer wall of which is connected to a pure water inlet pipeline and a water vapor outlet pipeline, located at the top and bottom ends of the steam generator, respectively; a cylinder is sleeved inside the steam generator, the diameter of the cylinder is smaller than that of the steam generator, the length of the cylinder is longer than that of the steam generator, the bottom of the cylinder is close to the bottom of the steam generator, the lowest end of the cylinder is connected to the outlet pipeline, the diameter of the outlet pipeline is smaller than that of the cylinder, and the outlet pipeline protrudes from the bottom end of the steam generator; the outer wall of the cylinder is connected to a fire detection port, which is located in the lower half of the cylinder and penetrates the side wall of the steam generator; a hydrogen inlet pipeline and an oxygen inlet pipeline are plugged into the upper part of the outer wall of the cylinder, wherein the hydrogen inlet pipeline is L-shaped.

[0008] As a further solution of the present invention: a flame stabilizer is provided inside the cylinder, a catalytic grid is covered above the flame stabilizer, a retaining ring is provided above the catalytic grid at a distance from one end, a premixing device is provided above the retaining ring at a distance from one end, the outlet of the hydrogen inlet pipeline and the outlet of the oxygen inlet pipeline are both inserted into the premixing device; above the premixing device is a head of the cylinder, which encapsulates the cylinder.

[0009] As a further solution of the present invention: the premixing device is located at the junction of the top of the steam generating device and the cylinder, the bottom of the premixing device is connected to a bottom seal, the top of the premixing device is connected to a top seal, the outlet of the L-shaped hydrogen inlet pipeline passes through the cylinder and is inserted from the top seal of the premixing device, and the outlet of the oxygen inlet pipeline passes through the cylinder and is inserted from the side wall of the premixing device.

[0010] As a further solution of the present invention: a plurality of openings are evenly distributed on the side wall of the premixing device near the bottom cover, and the openings are at an angle of 60°.

[0011] As a further solution of the present invention: the steam generating device can utilize the heat generated by the outer wall of the cylinder to reduce heat loss and make full use of the heat.

[0012] Compared with the prior art, the present invention uses a premixer, a flame stabilizer and a catalytic grid inside the cylinder to mix the incoming hydrogen and oxygen once inside the premixer, and then mix them a second time on the inner wall of the cylinder through the openings in the premixer, so that the hydrogen and oxygen entering the catalytic combustion are mixed more evenly; by utilizing the high-temperature catalytic combustion on the hydrogen side, the combustion is sufficient, and the heat on the hydrogen side and the air side can be better recovered; the external steam generating device can utilize the heat generated by the outer wall of the cylinder, reduce heat loss, make more full use of the heat, and improve the heat utilization rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the oxyhydrogen burner used for SOEC of the utility model.

[0014] Figure 2 It is an exploded view of the oxyhydrogen burner used for SOEC according to the utility model.

[0015] In the figure: 101, hydrogen inlet pipeline, 102, oxygen inlet pipeline, 103, outlet pipeline, 104, pure water inlet pipeline, 105, water vapor outlet pipeline, 106, flame detection port, 201, head, 202, premixing device, 203, baffle ring, 204, catalytic grid, 205, flame stabilizer, 206, cylinder, 207, steam generating device. DETAILED DESCRIPTION

[0016] The present invention will be further described below with reference to the accompanying drawings. The position of the outlet pipe 103 is defined as the bottom.

[0017] like Figures 1 to 2 As shown, the oxyhydrogen burner for SOEC includes a cylindrical steam generator 207, and the outer wall of the steam generator 207 is connected to a pure water inlet pipe 104 and a water vapor outlet pipe 105, which are respectively located at the top and bottom ends of the steam generator 207; pure water is added from the pure water inlet pipe 104, and is heated to become steam by absorbing high-temperature hydrogen and the heat of combustion, and is discharged from the water vapor outlet pipe 105; the steam generator 207 is internally sleeved with a cylinder 206, the diameter of the cylinder 206 is smaller than that of the steam generator 207, and the length of the cylinder 206 is longer than that of the steam generator 207. 207, the bottom of the cylinder 206 is close to the bottom end of the steam generating device 207, the lowest end of the cylinder 206 is connected to the outlet pipe 103, the diameter of the outlet pipe 103 is smaller than the diameter of the cylinder 206, and the outlet pipe 103 protrudes from the lower end of the steam generating device 207; the outer wall of the cylinder 206 is connected to the fire detection port 106, the fire detection port 106 is located in the lower half of the cylinder 206, and passes through the side wall of the steam generating device 207; the hydrogen inlet pipe 101 and the oxygen inlet pipe 102 are inserted above the outer wall of the cylinder 206, and the hydrogen inlet pipe 101 is L-shaped.

[0018] In order to make the combustion flame more uniform and stable and effectively prevent backfire, a flame stabilizer 205 is provided inside the cylinder 206; the flame stabilizer 205 is covered with a catalytic grid 204, and a baffle ring 203 is provided above the catalytic grid 204 at a distance from one end. A premixing device 202 is provided above the baffle ring 203 at a distance. The outlets of the hydrogen inlet pipeline 101 and the oxygen inlet pipeline 102 are both inserted into the premixing device 202. Above the premixing device 202 is the head 201 of the cylinder 206, which encapsulates the cylinder 206. The diameter of the flame stabilizer 205, the diameter of the catalytic grid 204, and the maximum diameter of the baffle ring 203 are consistent with the inner diameter of the cylinder 206. The diameter of the premixing device 202 is smaller than the diameter of the cylinder 206. The flame stabilizer 205, the catalytic grid 204, the baffle ring 203, and the premixing device 202 are distributed axially along the cylinder 206.

[0019] The premixing device 202 is located at the junction of the top of the steam generating device 207 and the cylinder 206. The bottom of the premixing device 202 is connected to a bottom seal, and the top of the premixing device 202 is connected to a top seal. The outlet of the L-shaped hydrogen inlet pipeline 101 passes through the cylinder 206 and is inserted from the top seal of the premixing device 202. The outlet of the oxygen inlet pipeline 102 passes through the cylinder 206 and is inserted from the side wall of the premixing device 202.

[0020] Several openings are evenly distributed on the side wall of the premixing device 202 near the bottom seal, and the openings are angled at 60 degrees. The hydrogen and oxygen form a swirl in the premixing device 202, so that the hydrogen and oxygen are mixed more fully.

[0021] The steam generating device 207 can better utilize the heat generated by the outer wall of the cylinder 206, reduce heat loss, and make full use of the heat.

[0022] The working process of the present invention is as follows: first, high-temperature hydrogen generated by the SOEC system is introduced through the hydrogen inlet line 101, and oxygen purified from the SOEC system exhaust gas is introduced through the oxygen inlet line 102. The hydrogen and oxygen are mixed in the premixing device 202 and released through the opening of the premixing device 202 as a hydrogen-oxygen mixed gas. Because the opening is at 60 degrees and is blocked by the baffle ring 203, the hydrogen-oxygen mixed gas forms a vortex in the cylinder 206, allowing the hydrogen and oxygen to mix more thoroughly. The hydrogen-oxygen mixed gas enters the catalytic grid 204 through the holes in the baffle ring 203, where catalytic combustion occurs. The flame passes through the flame stabilizer 205, making the flame more uniform and stable. The high-temperature steam and hydrogen mixture in the outlet line 103 provides heat to subsequent equipment. The external steam generator 207, which adds pure water from the pure water inlet line 104, absorbs the heat generated by the outer wall of the cylinder 206, namely the high-temperature hydrogen and the heat of combustion, and is heated to steam, which is discharged from the water vapor outlet line 105.

Claims

1. An oxyhydrogen burner for SOEC, characterized in that: The invention comprises a cylindrical steam generating device (207), wherein the outer wall of the steam generating device (207) is connected with a pure water inlet pipe (104) and a water vapor outlet pipe (105), which are respectively located at the top and the bottom of the steam generating device (207); the steam generating device (207) is internally sleeved with a cylinder (206), the diameter of the cylinder (206) is smaller than that of the steam generating device (207), the length of the cylinder (206) is longer than that of the steam generating device (207), the bottom of the cylinder (206) is close to the bottom of the steam generating device (207), and the cylinder (206) is in contact with the bottom of the steam generating device (207). 6) is connected to the outlet pipe (103), the diameter of the outlet pipe (103) is smaller than the diameter of the cylinder (206), and the outlet pipe (103) protrudes from the lower end of the steam generating device (207); the outer wall of the cylinder (206) is connected to the fire detection port (106), the fire detection port (106) is located in the lower half of the cylinder (206) and passes through the side wall of the steam generating device (207); the upper part of the outer wall of the cylinder (206) is plugged with a hydrogen inlet pipe (101) and an oxygen inlet pipe (102), wherein the hydrogen inlet pipe (101) is L-shaped.

2. The oxyhydrogen burner for SOEC according to claim 1, characterized in that: A flame stabilizer (205) is provided inside the cylinder (206), a catalytic grid (204) is covered above the flame stabilizer (205), a retaining ring (203) is provided above the catalytic grid (204) at a distance from one end, a premixing device (202) is provided above the retaining ring (203) at a distance from one end, the outlet of the hydrogen inlet pipeline (101) and the outlet of the oxygen inlet pipeline (102) are both inserted into the premixing device (202); above the premixing device (202) is a head (201) of the cylinder (206), and the head (201) seals the cylinder (206).

3. The oxyhydrogen burner for SOEC according to claim 2, characterized in that: The premixing device (202) is located at the junction of the top of the steam generating device (207) and the cylinder (206). The bottom of the premixing device (202) is connected to a bottom seal, and the top of the premixing device (202) is connected to a top seal. The outlet of the L-shaped hydrogen inlet pipeline (101) passes through the cylinder (206) and is inserted from the top seal of the premixing device (202). The outlet of the oxygen inlet pipeline (102) passes through the cylinder (206) and is inserted from the side wall of the premixing device (202).

4. The oxyhydrogen burner for SOEC according to claim 2 or 3, characterized in that: A plurality of openings are evenly distributed on the side wall of the premixing device (202) near the bottom cover, and the openings are at an angle of 60°.

5. The oxyhydrogen burner for SOEC according to claim 1, characterized in that: The steam generating device (207) can utilize the heat generated by the outer wall of the cylinder (206) to reduce heat loss.

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