Exhaust device for pure hydrogen engine

Abstract

This invention discloses an exhaust device suitable for pure hydrogen gas engines, relating to the technical field of exhaust treatment for pure hydrogen gas engines. It solves the problem that existing pure hydrogen gas engine exhaust treatment devices suffer from the inability of a single condensation dehydration technology to completely eliminate whitening, and the inability of a single whitening device to remove water. A multi-stage condensation structure is installed inside the flange pipe at the uppermost end of the exhaust pipeline. The multi-stage condensation structure and the inner wall of the flange pipe form a condensation chamber. A condensation channel is provided within the multi-stage condensation structure. A return water connector and a water inlet connector are provided on the flange pipe. The water inlet connector is connected to the lower water inlet of the condensation channel; the return water connector is connected to the upper water return port of the condensation channel. By setting up a multi-stage condensation dehydration device in the main exhaust channel, the exhaust humidity is reduced while achieving the whitening effect, thus enabling the exhaust device to simultaneously possess the characteristics of corrosion resistance, stable operation, and economic and environmental protection.

Description

Technical Field

[0001] This invention relates to the technical field of exhaust gas treatment for pure hydrogen gas engines, and more particularly to an exhaust gas device suitable for pure hydrogen gas engines. Background Technology

[0002] With the rapid development of the hydrogen energy industry, pure hydrogen gas turbines (hereinafter referred to as "pure hydrogen turbines"), as high-efficiency power equipment with zero carbon emissions, are widely used in scenarios such as integrated wind and solar hydrogen production, grid peak shaving, distributed energy, and industrial park power supply. They are one of the core equipment for achieving the "dual carbon" goal. Pure hydrogen turbines use 100% pure hydrogen as fuel, and their combustion products have characteristics significantly different from those of traditional natural gas and oil turbines, leading to unique technical challenges in exhaust gas treatment. Among these challenges, exhaust water removal and whitening elimination are key aspects for achieving compliant and stable operation of pure hydrogen turbines. Existing pure hydrogen turbine exhaust gas treatment devices suffer from the problem that a single condensation dehydration technology cannot completely eliminate whitening, while a single whitening elimination device cannot remove water. The simultaneous operation of multiple exhaust gas treatment devices makes it difficult to achieve a balance between economic efficiency and environmental protection. Summary of the Invention

[0003] The existing exhaust treatment devices for pure hydrogen gas engines have the problem that a single condensation and dehydration technology cannot completely eliminate whitening, and a single whitening device cannot remove water. The purpose of this invention is to provide an exhaust device suitable for pure hydrogen gas engines. By setting up a multi-stage condensation and dehydration device in the main exhaust channel, the exhaust humidity is reduced while achieving the effect of whitening. Thus, the exhaust device can simultaneously have the characteristics of corrosion resistance, stable operation, and economic and environmental protection.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0005] An exhaust device suitable for a pure hydrogen gas engine, comprising: an exhaust pipe 1 and an exhaust tee 2, wherein the lower end of the exhaust tee 2 is connected to the upper end of the exhaust pipe 1, and the exhaust tee 2 is connected to a PSA pressure swing adsorption device through a transverse branch.

[0006] It also includes: a multi-stage condensing structure, which is installed in the flange pipe at the top of the exhaust pipe 1, and the multi-stage condensing structure and the inner wall of the flange pipe form a condensing chamber; a condensing channel is provided in the multi-stage condensing structure; a return water connector 6 and a water inlet connector 7 are provided on the flange pipe; the water inlet connector 7 is connected to the lower water inlet of the condensing channel; the return water connector 6 is connected to the upper water return port of the condensing channel.

[0007] It also includes: a drain filter 3 and a pipe joint 5. The flange pipe has multiple drain holes, all of which are connected to the condensation chamber. The outer wall of the flange pipe is equipped with a drain filter 3, and the multiple drain holes are connected to the drain filter 3. The lower end of the drain filter 3 is equipped with a pipe joint 5.

[0008] The exhaust device applicable to the pure hydrogen gas engine described above further includes: a blower, which is installed in the transverse branch of the exhaust tee 2, and the blower is used to supply air to the exhaust pipe 1 or extract exhaust from the exhaust pipe 1.

[0009] The exhaust device applicable to the above-mentioned pure hydrogen gas engine includes a multi-stage condensation structure arranged sequentially from bottom to top along the flange pipe route. Each stage of the condensation structure includes a ceramic condenser 8, a water collector 10, and a guide plate 11, arranged sequentially from bottom to top. The water collector 10 is used to collect the condensate generated by the ceramic condenser 8. The water collector 10 is provided with multiple water flow holes that are connected vertically. The guide plate 11 is welded to the bottom of the water collector 10 and is used to guide the condensate.

[0010] In the exhaust device applicable to pure hydrogen gas engines described above, each drain hole on the flange pipe at the uppermost end of the exhaust pipe 1 is at the same height as a guide plate 11, and the condensate after being guided by the guide plate 11 is discharged into the drain filter 3 through the drain hole.

[0011] The exhaust device applicable to the pure hydrogen gas engine described above has a measuring interface 4 on the flange pipe at the uppermost end of the exhaust pipe 1, which is used to connect to a hydrogen analyzer.

[0012] In the exhaust device applicable to the above-mentioned pure hydrogen gas engine, the height of the return water connector 6 is higher than the height of the inlet water connector 7.

[0013] The exhaust device applicable to the above-mentioned pure hydrogen gas engine includes a ceramic condenser 8 with a microchannel 9 inside. The microchannels 9 of multiple ceramic condensers 8 are connected in pairs through condensation pipes to form a condensation channel.

[0014] In the exhaust device applicable to the pure hydrogen gas engine described above, the ceramic condenser 8 is cylindrical, and the microchannels 9 located inside the ceramic condenser 8 are arranged in a spiral shape along the axial direction.

[0015] In the above-mentioned exhaust device applicable to pure hydrogen gas engines, the guide plate 11 is annular and inclined, and the height of the inner edge of the guide plate 11 is higher than its outer edge height.

[0016] In the exhaust device applicable to pure hydrogen gas engines described above, both the inner and outer edges of the water collector 10 are provided with upwardly extending baffles, with the baffle located on the inner edge of the water collector 10 being higher than the baffle located on the outer edge of the water collector 10.

[0017] In the above-mentioned exhaust device applicable to pure hydrogen gas engines, during use, the external condensing medium enters the lowest ceramic condenser 8 through the water inlet connector 7, and flows through all ceramic condensers 8 in sequence through the condensing pipes between each ceramic condenser 8. After completing the condensation heat exchange of the exhaust gas, the condensing medium flows out from the water return connector 6, forming a circulating loop of the condensing medium, thereby improving the condensation effect.

[0018] The aforementioned exhaust system for a pure hydrogen gas turbine further includes a heat exchanger located outside the exhaust pipe 1. The pipe joint 5 is connected to the heat exchanger via a pipe. The heat exchanger utilizes the waste heat from the condensate for secondary processing. The condensate discharged after heat exchange can be pumped back into the inlet joint 7 via a circulation pump, thus achieving micro-circulation and further improving environmental performance.

[0019] The present invention, by employing the above-mentioned technology, has the following positive effects compared with the prior art:

[0020] (1) By setting up a multi-stage condensation and dehydration device in the main exhaust channel, the present invention reduces the exhaust humidity and achieves the effect of eliminating whitening, thereby enabling the exhaust device to have the characteristics of corrosion resistance, stable operation, and economic and environmental protection.

[0021] (2) The pure hydrogen gas turbine exhaust device of the present invention achieves efficient condensation of high temperature and high humidity exhaust through a multi-stage integrated ceramic condensation structure. Combined with a water collector with long baffles, a guide plate and a drainage structure with filtration function, it realizes stable collection, directional flow, filtration discharge and micro-circulation secondary utilization of condensate.

[0022] (3) Based on the hydrogen content detection and the core threshold requirements of gas turbine emissions, this invention can accurately detect the hydrogen content in the exhaust gas in real time, providing data basis for system operation and control. The connection design between the exhaust tee and the PSA pressure swing adsorption device realizes the subsequent treatment of compliant exhaust gas and the utilization of hydrogen resources. The overall structure design is reasonable and the components are closely matched, which is fully adapted to the exhaust gas treatment requirements of pure hydrogen gas turbines. It has strong operational stability and practicality. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of an exhaust device applicable to a pure hydrogen gas engine according to the present invention. Figure 2 This is a front view of an exhaust device applicable to a pure hydrogen gas engine according to the present invention. Figure 3 yes Figure 2 A magnified view of a portion of the image. Figure 4 This is a left view of an exhaust device applicable to a pure hydrogen gas engine according to the present invention. Figure 5 yes Figure 4 A magnified view of a portion of the image. Figure 6 yes Figure 4 A sectional view. Figure 7 yes Figure 6A magnified view of a portion of the image. Figure 8 This is an assembly diagram of an exhaust device applicable to a pure hydrogen gas engine according to the present invention. Figure 9 yes Figure 8 Assembly diagram of a multi-stage condenser structure. Figure 10 yes Figure 9 Cross-sectional view of a multi-stage condensation structure. Figure 11 yes Figure 10 A schematic diagram of the assembly of a multi-stage condenser structure. Figure 12 This is a schematic diagram of the structure of a ceramic condenser for an exhaust device applicable to a pure hydrogen gas engine according to the present invention. Figure 13 This is a schematic diagram of the structure of a water collector for an exhaust device applicable to a pure hydrogen gas engine according to the present invention. Figure 14 This is a schematic diagram of the structure of a guide plate for an exhaust device applicable to a pure hydrogen gas engine according to the present invention.

[0024] In the attached diagram: 1. Exhaust pipe; 2. Exhaust tee; 3. Drain filter; 4. Measuring interface; 5. Pipe connector; 6. Return water connector; 7. Inlet water connector; 8. Ceramic condenser; 9. Microchannel; 10. Water collector; 11. Baffle plate. Detailed Implementation

[0025] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the scope of the invention.

[0026] Please refer to Figures 1 to 14 As shown, an exhaust device suitable for a pure hydrogen gas engine is illustrated, comprising: an exhaust pipe 1, with multiple ceramic condensers 8 installed on the upper part of the exhaust pipe 1. The multiple ceramic condensers 8 are arranged vertically to form a multi-stage condensation structure, and a condensation pipe is connected in series between every two ceramic condensers 8.

[0027] Furthermore, in a preferred embodiment, each ceramic condenser 8 is made by 3D printing ceramic process, and its ceramic condenser 8 has a microchannel 9 structure integrally formed inside. The diameter of the microchannel 9 is between 1 and 3 mm, and the wall thickness between the microchannels 9 is 5 mm, which can meet the long-term pressure resistance of 80 MPa.

[0028] Furthermore, in a preferred embodiment, a water collector 10 is installed below each ceramic condenser 8, and the side of the water collector 10 in contact with the airflow is provided with a long baffle to prevent the exhaust airflow from sucking away the condensate.

[0029] Furthermore, in a preferred embodiment, each water collector 10 has a water flow hole, and each water collector 10 has a guide plate 11 welded below it. At the height of the exhaust pipe 1 corresponding to each guide plate 11, a drain hole leading to the outside is provided on the exhaust pipe 1.

[0030] Furthermore, in a preferred embodiment, a drain filter 3 is welded to the outside of the plurality of drain holes, a primary filter is provided inside the drain filter 3, and a pipe joint 5 is welded below the drain filter 3.

[0031] Furthermore, in a preferred embodiment, a water inlet connector 7 is installed on the ceramic condenser 8 located at the bottom of the exhaust device, and a water return connector 6 is installed on the ceramic condenser 8 located at the top of the exhaust device. Both the water return connector 6 and the water inlet connector 7 extend to the outside of the exhaust pipe 1.

[0032] Furthermore, in a preferred embodiment, a measuring interface 4 extending into the interior is welded to the outside of the exhaust pipe 1.

[0033] Furthermore, in a preferred embodiment, an exhaust tee 2 is installed on the upper part of the exhaust pipe 1, a fan is installed in the transverse branch of the exhaust tee 2, and the flange of the transverse branch of the exhaust tee 2 is connected to the PSA pressure swing adsorption device.

[0034] Furthermore, in a preferred embodiment, by setting a multi-stage condensation and dehydration device in the main exhaust channel, the exhaust humidity is reduced while achieving the effect of eliminating whitening.

[0035] The above are merely preferred embodiments of the present invention and are not intended to limit the implementation methods and protection scope of the present invention.

[0036] In addition to the above, the present invention also has the following embodiments:

[0037] In a further embodiment of the present invention, an exhaust device applicable to a pure hydrogen gas engine includes an exhaust pipe 1 as its core component. Multiple ceramic condensers 8 are installed on the upper part of the exhaust pipe 1, arranged vertically to form a multi-stage condensation structure. High-temperature, high-humidity exhaust gas contacts the ceramic condensers 8 layer by layer, and water vapor is cooled and condensed layer by layer. This structure significantly improves the condensation effect on the exhaust gas from the pure hydrogen gas engine. To achieve fluid connectivity between the multi-stage condensation, a condensation pipe is connected in series between every two ceramic condensers 8. The condensation pipe provides a channel for the flow of the condensing medium, ensuring the continuity of multi-stage condensation. Cooling water is injected from bottom to top into each layer of ceramic condensers 8 through the condensation pipe, further enhancing the condensation effect on the exhaust gas from the pure hydrogen gas engine. Before being released into the atmosphere, the exhaust gas from the pure hydrogen gas engine undergoes large-area condensation and dehumidification, reducing the water vapor content in the exhaust gas and preventing the saturation from reaching the dew point. This achieves the effect of eliminating whitening while removing water, thus enabling the exhaust device to simultaneously possess corrosion resistance, stable operation, and economic and environmental protection characteristics.

[0038] In a further embodiment of the present invention, each ceramic condenser 8 is integrally manufactured using a 3D printing ceramic process. This process precisely achieves the integral molding of the internal microchannel 9 structure of the ceramic condenser 8, eliminating the need for subsequent splicing and processing, thus improving the structural integrity and pressure resistance of the ceramic condenser 8. To ensure the condensation effect of the multi-stage ceramic condenser 8, high-pressure cooling water is injected into the ceramic condenser 8, allowing the low-temperature cooling water to quickly pass through the multi-stage ceramic condenser 8. The diameter of the microchannel 9 is set between 1 and 3 mm, and the wall thickness between the microchannels 9 is 5 mm. This size design, combined with the 3D printing ceramic process, ensures that the internal microchannel 9 of the ceramic condenser 8 is continuous and unblocked, meeting the long-term pressure resistance requirement of 80 MPa, thereby adapting to the high-pressure operating conditions of the ceramic condenser 8 and preventing damage to the ceramic condenser 8 due to excessive pressure. The ceramic condenser 8 is made of SiC ceramic material, which has excellent corrosion resistance and high-temperature resistance, meeting the high-temperature operating environment of 500-600℃ for exhaust gas, while avoiding dew point corrosion.

[0039] In a further embodiment of the present invention, a water collector 10 is fixedly installed below each ceramic condenser 8. The water collector 10 is used to collect the condensate generated by the condensation of the ceramic condenser 8. In order to prevent the exhaust gas flow of the pure hydrogen gas engine from sucking away the condensate collected in the water collector 10 again and affecting the condensate collection effect, a long baffle is specially provided on the side of the water collector 10 that is in contact with the air flow. The long baffle can block the exhaust gas flow and ensure that the condensate is stably retained in the water collector 10. At the same time, the design of the long baffle increases the capacity of the water collector 10 to cope with the large amount of condensate generated by the high humidity exhaust.

[0040] In a further embodiment of the present invention, each water collector 10 is provided with a water flow hole, through which the condensate in the water collector 10 can flow downward; a guide plate 11 is welded below each water collector 10, which guides the condensate flowing out of the water flow hole, causing the condensate to converge in a designated direction; correspondingly, at the height position of the exhaust pipe 1 corresponding to each guide plate 11, a drain hole leading to the outside is provided on the exhaust pipe 1, through which the condensate guided by the guide plate 11 can be discharged to the outside of the exhaust pipe 1; and the lowest guide plate 11 also serves to guide the exhaust airflow, so as to reduce the influence of the ceramic condenser 8 on the exhaust airflow and ensure smooth exhaust.

[0041] In a further embodiment of the present invention, to prevent impurities in the condensate from clogging the drainage channel, a drainage filter 3 is welded together on the outside of multiple drainage holes, so that all condensate flowing out of the drainage holes must pass through the drainage filter 3. The drainage filter 3 is equipped with a primary filter device, which can perform preliminary filtration on the discharged condensate and intercept exhaust impurities mixed in the condensate. Below the drainage filter 3, a pipe joint 5 is also welded, which is connected to the heat exchanger through a pipe to reuse the waste heat of the condensate. The cooled condensate can be directly fed into the ceramic condenser 8 through a circulation pump, thereby realizing micro-circulation and further improving the environmental protection effect.

[0042] In a further embodiment of the present invention, a water inlet connector 7 is installed on the ceramic condenser 8 at the bottom of the exhaust device, and a water return connector 6 is installed on the ceramic condenser 8 at the top of the exhaust device. Both the water return connector 6 and the water inlet connector 7 extend to the outside of the exhaust pipe 1. In use, the external condensing medium enters the ceramic condenser 8 at the bottom through the water inlet connector 7, and flows through all the ceramic condensers 8 in sequence through the condensing pipes between each ceramic condenser 8. After completing the condensation heat exchange of the exhaust, the condensing medium flows out from the water return connector 6, forming a circulating loop of the condensing medium, thereby improving the condensation effect.

[0043] In a further embodiment of the present invention, a measurement interface 4 extending into the interior of the exhaust pipe 1 is welded to the outside of the exhaust pipe 1. A hydrogen analyzer is installed at the measurement interface 4 to detect the hydrogen content in the exhaust gas inside the exhaust pipe 1 in real time. The detection data can be directly transmitted to the control system to match its core threshold requirements for hydrogen content. This provides key data support for the operation adjustment of the pure hydrogen gas engine and the parameter optimization of the exhaust gas subsequent treatment process, ensuring that the pure hydrogen gas engine and exhaust gas treatment system operate stably within the safe and efficient threshold range of hydrogen content.

[0044] In a further embodiment of the present invention, an exhaust tee 2 is also installed at the upper part of the exhaust pipe 1. A fan is installed inside the transverse branch of the exhaust tee 2. When the hydrogen content in the exhaust cannot reach the economic index of hydrogen recovery, the fan reverses and sends air into the exhaust pipe 1 to further reduce the humidity of the flue gas, so that the water vapor cannot be saturated, and further assists in eliminating white spots in the exhaust.

[0045] In a further embodiment of the present invention, when the hydrogen content in the exhaust reaches the recovery index, the blower draws the exhaust from the exhaust pipe 1; the transverse branch flange of the exhaust tee 2 is connected to the PSA pressure swing adsorption device, and the pure hydrogen gas turbine exhaust, which has been condensed by the multi-stage ceramic condenser 8 and whose hydrogen content has been detected by the measurement interface 4 to meet the standard, can be transported to the PSA pressure swing adsorption device by the blower in the exhaust tee 2 for subsequent purification, recovery and other treatments, so as to realize the resource utilization of hydrogen. If the detected hydrogen content exceeds the core threshold of Jupiter-1, the gas turbine operation or exhaust treatment process can be adjusted in time by the control system to ensure the safe operation of the system.

[0046] In a further embodiment of the present invention, the pure hydrogen gas turbine exhaust device of the present invention achieves efficient condensation of high-temperature and high-humidity exhaust gas through a multi-stage integrated ceramic condensation structure. Combined with a water collector 10 with long baffles, a guide plate 11, and a drainage structure with filtration function, it achieves stable collection, directional flow guidance, filtration discharge, and micro-circulation secondary utilization of condensate. Simultaneously, based on hydrogen content detection and the core threshold requirements for gas turbine emissions, it can accurately detect the exhaust hydrogen content in real time, providing data for system operation control. The connection design between the exhaust tee 2 and the PSA pressure swing adsorption device enables subsequent treatment of compliant exhaust gas and hydrogen resource utilization. The overall structural design is reasonable, and the components are tightly integrated, fully adapting to the exhaust gas treatment requirements of a pure hydrogen gas turbine, exhibiting strong operational stability and practicality.

[0047] In a further embodiment of the present invention, a limiting guide rod is also included, such as... Figure 8 and Figure 11 As shown, multiple limiting guide rods are set at equal angles around the circumference. All the limiting guide rods are arranged along the axial direction of the exhaust pipe 1. Multiple guide holes are opened on the ceramic condenser 8. The ceramic condenser 8 can be positioned and installed on the limiting guide rods through the multiple guide holes, which facilitates the positioning and installation of the multi-stage condensation structure.

[0048] The above are merely preferred embodiments of the present invention and are not intended to limit the implementation methods and protection scope of the present invention. Those skilled in the art should recognize that any equivalent substitutions and obvious changes made based on the description and illustrations of the present invention should be included within the protection scope of the present invention.

Claims

1. An exhaust device suitable for a pure hydrogen gas engine, characterized in that, include: Exhaust pipe (1) and exhaust tee (2), the lower end of exhaust tee (2) is connected to the upper end of exhaust pipe (1), and exhaust tee (2) is connected to PSA pressure swing adsorption device through a transverse branch; It also includes: a multi-stage condensing structure, which is installed in the flange pipe at the top of the exhaust pipe (1), and the multi-stage condensing structure and the inner wall of the flange pipe form a condensing chamber; a condensing channel is provided in the multi-stage condensing structure; a return water connector (6) and a water inlet connector (7) are provided on the flange pipe; the water inlet connector (7) is connected to the lower water inlet of the condensing channel; the return water connector (6) is connected to the upper return water inlet of the condensing channel; It also includes: a drain filter (3) and a pipe joint (5). The flange pipe has multiple drain holes, all of which are connected to the condensation chamber. The outer wall of the flange pipe is equipped with a drain filter (3), and the multiple drain holes are connected to the drain filter (3). The lower end of the drain filter (3) is equipped with a pipe joint (5).

2. The exhaust device for a pure hydrogen gas engine according to claim 1, characterized in that, Also includes: A fan is installed in the transverse branch of the exhaust tee (2) and is used to supply air to the exhaust pipe (1) or extract exhaust from the exhaust pipe (1).

3. The exhaust device for a pure hydrogen gas engine according to claim 1, characterized in that, The multi-stage condensing structure is arranged sequentially from bottom to top along the flange pipe route; each stage of the condensing structure includes: a ceramic condenser (8), a water collector (10), and a guide plate (11), the guide plate (11), the water collector (10), and the ceramic condenser (8) are arranged sequentially from bottom to top; the water collector (10) is used to collect the condensate generated by the condensation of the ceramic condenser (8); the water collector (10) is provided with multiple water flow holes that are connected from top to bottom; the guide plate (11) is welded to the bottom of the water collector (10), and the guide plate (11) is used to guide the condensate.

4. The exhaust device for a pure hydrogen gas engine according to claim 3, characterized in that, Each drain hole on the flange at the top of the exhaust pipe (1) is at the same height as a guide plate (11). The condensate after being guided by the guide plate (11) is discharged into the drain filter (3) through the drain hole.

5. The exhaust device for a pure hydrogen gas engine according to claim 1, characterized in that, A measurement interface (4) is provided on the flange at the top of the exhaust pipe (1), and the measurement interface (4) is used to connect to a hydrogen analyzer.

6. The exhaust device for a pure hydrogen gas engine according to claim 1, characterized in that, The height of the return water connector (6) is higher than the height of the inlet water connector (7).

7. The exhaust device for a pure hydrogen gas engine according to claim 3, characterized in that, The ceramic condenser (8) is provided with microchannels (9), and the microchannels (9) of multiple ceramic condensers (8) are connected in pairs through condensation pipes to form condensation channels.

8. The exhaust device for a pure hydrogen gas engine according to claim 7, characterized in that, The ceramic condenser (8) is cylindrical, and the microchannels (9) inside the ceramic condenser (8) are arranged in a spiral along the axial direction.

9. The exhaust device for a pure hydrogen gas engine according to claim 3, characterized in that, The guide plate (11) is circular and inclined, and the height of the inner edge of the guide plate (11) is higher than its outer edge height.

10. The exhaust device for a pure hydrogen gas engine according to claim 3, characterized in that, The water collector (10) has upwardly extending baffles on both its inner and outer edges, with the baffle on the inner edge of the water collector (10) being higher than the baffle on the outer edge of the water collector (10).

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