A hydrogen boiler evacuation device

Abstract

The utility model relates to a kind of emptying device for hydrogen-fired boiler, including boiler drum, furnace, back pass, flue and combustor, the air interface of combustor is connected to air blower, the top of back pass is connected to exhaust pipe by connecting pipe, the steam-water space in the exhaust pipe passes through boiler drum and stretches out boiler drum, the one end of exhaust pipe that stretches out boiler drum is equipped with electric exhaust valve, electric exhaust valve connects emptying pipe, combustor, air blower and electric exhaust valve are electrically connected with boiler control system.The utility model empties the hydrogen that possibly accumulated in furnace before boiler start or after extinguishing, the condensed water generated in exhaust pipe falls into exhaust pipe bottom and is collected and is regularly discharged by external valve, to prevent exhaust pipe condensed water from entering back pass, by the above-mentioned measure, WNS type boiler can realize safe hydrogen combustion.

Description

Technical Field

[0001] This utility model relates to the field of industrial boiler technology, specifically to an venting device for a hydrogen-fired boiler. Background Technology

[0002] Currently, to achieve "zero carbon" and environmental protection, the application of hydrogen energy is becoming increasingly widespread, and pure hydrogen and hydrogen-based mixtures are increasingly used as boiler fuels. Hydrogen is the least dense gas known. When hydrogen is burned as fuel in a boiler, unburned hydrogen tends to accumulate at the highest point in the furnace. Furthermore, because the explosive limits of hydrogen in air are 4.0% to 75.6%, which is a wide range, hydrogen accumulation can easily lead to deflagration. Conventional WNS-type boilers cannot safely burn hydrogen. Utility Model Content

[0003] The purpose of this utility model is to overcome the above-mentioned shortcomings and provide a venting device for hydrogen-fired boilers. By connecting an exhaust pipe to the top of the combustion chamber and leading the exhaust pipe to the outside of the boiler drum, an electric exhaust valve (or vacuum pump) is configured at the end of the exhaust pipe. The electric exhaust valve is then connected to the venting pipe to vent any hydrogen that may accumulate in the furnace before the boiler is started or after it is shut down, so that the WNS type boiler can achieve safe hydrogen combustion.

[0004] The purpose of this utility model is achieved as follows: A venting device for a hydrogen-fired boiler includes a boiler drum, a furnace shell, a combustion chamber, a flue, and a burner. The boiler drum is horizontally arranged, with the furnace shell, combustion chamber, and flue all located inside the boiler drum. The furnace shell is positioned in the lower part of the boiler drum, and the flue is positioned above the furnace shell. The combustion chamber is connected to both the furnace shell and the flue. The air interface of the burner is connected to a blower. The top of the combustion chamber is connected to an exhaust pipe via a connecting pipe. The exhaust pipe extends out of the boiler drum through the steam-water space inside the boiler drum. An electric exhaust valve is provided at one end of the exhaust pipe extending out of the boiler drum, and the electric exhaust valve is connected to the venting pipe. The burner, blower, and electric exhaust valve are electrically connected to the boiler control system.

[0005] Preferably, one end of the connecting pipe is welded to the top of the combustion chamber, and the other end extends into the exhaust pipe. The exhaust pipe is provided with an air inlet corresponding to the connecting pipe, and the air inlet is higher than the bottom of the exhaust pipe.

[0006] Preferably, the exhaust pipe located inside the boiler drum is cooled by the steam and water inside the boiler drum, and the condensate generated by the cooling of the exhaust pipe falls into the bottom of the exhaust pipe due to gravity. The end of the connecting pipe extending into the exhaust pipe is provided with an oblique opening.

[0007] Preferably, the exhaust pipe outside the boiler drum is equipped with a cooling water jacket.

[0008] Preferably, the bottom of the exhaust pipe is connected to a drain pipe, and a drain valve is provided at the end of the drain pipe that extends out of the pot.

[0009] Preferably, the bottom surface of the exhaust pipe is an inclined surface, and the drain pipe is located at the lowest point of the bottom surface of the exhaust pipe.

[0010] Preferably, the top outlet end of the vent pipe is located at a high point outside the boiler room.

[0011] The beneficial effects of this utility model are: This invention vents any hydrogen that may accumulate in the furnace before boiler startup or after shutdown. The condensate generated in the exhaust pipe is collected at the bottom of the exhaust pipe and periodically discharged through an external valve to prevent the condensate from entering the combustion chamber. Through these measures, the WNS type boiler can achieve safe hydrogen combustion. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of a venting device for a hydrogen-fired boiler according to the present invention.

[0013] Figure 2 for Figure 1 A magnified view of a portion of the image.

[0014] The components include: boiler drum 1; furnace shell 2; combustion chamber 3; flue pipe 4; burner 5; blower 6; connecting pipe 7; exhaust pipe 8; electric exhaust valve 9; vent pipe 10; boiler control system 11; drain pipe 12; drain valve 13; and cooling water jacket 14. Detailed Implementation

[0015] See Figure 1 and Figure 2 This utility model relates to an venting device for a hydrogen-fired boiler, comprising a boiler drum 1, a furnace liner 2, a combustion chamber 3, a flue pipe 4, and a burner 5. The boiler drum 1 is horizontally arranged, with the furnace liner 2, combustion chamber 3, and flue pipe 4 all located inside the boiler drum 1. The furnace liner 2 is positioned in the lower part of the boiler drum 1, and the flue pipe 4 is positioned above the furnace liner 2. The combustion chamber 3 is connected to both the furnace liner 2 and the flue pipe 4. The burner 5 is a blower type, with its air interface connected to a blower 6. The top of the combustion chamber 3 is connected to an exhaust pipe 8 via a connecting pipe 7. The exhaust pipe 8 extends out of the boiler drum 1 through the steam-water space within the boiler drum 1. One end of the exhaust pipe 8 extending out of the boiler drum 1 is equipped with an electric exhaust valve 9, which is connected to a venting pipe 10. The burner 5, blower 6, and electric exhaust valve 9 are electrically connected to a boiler control system 11, which controls the operation of the burner 5, blower 6, and electric exhaust valve 9.

[0016] The exhaust pipe 8 is located on one side of the combustion chamber 3. One end of the connecting pipe 7 is welded to the top of the combustion chamber 3, and the other end extends into the exhaust pipe 8. The exhaust pipe 8 is provided with an air inlet corresponding to the connecting pipe 7. The air inlet is higher than the bottom of the exhaust pipe 8. The exhaust pipe 8 located inside the boiler drum 1 is cooled by the steam and water inside the boiler drum 1. The condensate generated by the cooling of the exhaust pipe 8 falls into the bottom of the exhaust pipe 8 under gravity for collection. In order to prevent condensate from entering the combustion chamber 3 from the exhaust pipe 8, the end of the connecting pipe 7 extending into the exhaust pipe 8 is provided with an oblique opening.

[0017] The bottom of the exhaust pipe 8 is connected to the drain pipe 12. The bottom surface of the exhaust pipe 12 is an inclined surface. The drain pipe 12 is located at the lowest point of the bottom surface of the exhaust pipe 8. A drain valve 13 is provided at the end of the drain pipe 12 that extends out of the pot drum 1.

[0018] The exhaust pipe 8 outside the boiler drum 1 is equipped with a cooling water jacket 14. Cooling water enters and exits the cooling water jacket 14 to cool the exposed exhaust pipe 8 and reduce the hydrogen discharge temperature. Alternatively, heat sinks can be used for heat dissipation, which also achieves the effect of reducing the hydrogen discharge temperature.

[0019] The outlet end of the vent pipe is located at a high point outside the boiler room to release the exhaust hydrogen gas.

[0020] If the pressure inside the furnace is low when the blower is purging, the electric exhaust valve can be replaced with a vacuum pump.

[0021] Working principle: When the boiler is started: Boiler starts → Electric exhaust valve 9 opens → Blower 6 purges → Electric exhaust valve 9 closes → Burner 5 ignites; Before the burner 5 is ignited, the electric exhaust valve 9 opens, and the purging air will discharge the hydrogen gas accumulated at the top of the combustion chamber 3.

[0022] When the boiler is shut down: Boiler is shut down → Electric exhaust valve 9 is opened → Blower 6 is used for purging → Electric exhaust valve 9 is closed → Boiler is shut down; Before the boiler is shut down and purged, the electric exhaust valve 9 is opened, and the purging air will discharge the hydrogen gas accumulated at the top of the combustion chamber.

[0023] This invention vents any hydrogen that may accumulate in the furnace before boiler startup or after shutdown. The condensate generated in the exhaust pipe is collected at the bottom of the exhaust pipe and periodically discharged through an external valve to prevent the condensate from entering the combustion chamber. Through these measures, the WNS type boiler can achieve safe hydrogen combustion.

[0024] In addition to the above embodiments, this utility model also includes other implementation methods. All technical solutions formed by equivalent transformation or equivalent substitution should fall within the protection scope of the claims of this utility model.

Claims

1. A venting device for a hydrogen-fired boiler, comprising a boiler drum, a furnace shell, a combustion chamber, a flue, and a burner, wherein the boiler drum is horizontally arranged, the furnace shell, the combustion chamber, and the flue are all disposed within the boiler drum, the furnace shell is located in the lower part of the boiler drum, the flue is located above the furnace shell, and the combustion chamber is connected to both the furnace shell and the flue, characterized in that: The burner's air interface is connected to a blower, and the top of the combustion chamber is connected to an exhaust pipe via a connecting pipe. The exhaust pipe extends out of the boiler drum through the steam-water space inside the boiler drum, and an electric exhaust valve is provided at one end of the exhaust pipe extending out of the boiler drum. The electric exhaust valve is connected to a vent pipe, and the burner, blower, and electric exhaust valve are electrically connected to the boiler control system.

2. A hydrogen boiler evacuation device according to claim 1, characterized in that: One end of the connecting pipe is welded to the top of the combustion chamber, and the other end extends into the exhaust pipe. The exhaust pipe is provided with an air inlet corresponding to the connecting pipe, and the air inlet is higher than the bottom of the exhaust pipe.

3. A hydrogen boiler evacuation device according to claim 2, characterized in that: The exhaust pipe located inside the boiler drum is cooled by the steam and water inside the boiler drum. The condensate generated by the cooling of the exhaust pipe falls into the bottom of the exhaust pipe due to gravity. The end of the connecting pipe that extends into the exhaust pipe is provided with an oblique opening.

4. A hydrogen boiler evacuation device according to claim 1 or 3, characterized in that: The exhaust pipe outside the boiler drum is equipped with a cooling water jacket.

5. The emptying device for a hydrogen boiler according to claim 1, characterized in that: The bottom of the exhaust pipe is connected to a drain pipe, and a drain valve is provided at the end of the drain pipe that extends out of the pot.

6. A hydrogen boiler evacuation device according to claim 5, characterized in that: The bottom surface of the exhaust pipe is sloping, and the drain pipe is located at the lowest point of the bottom surface of the exhaust pipe.

7. The venting device for a hydrogen-fired boiler according to claim 1, characterized in that: The top outlet of the vent pipe is located high outside the boiler room.

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