Gas emptying backwater prevention device

Abstract

The utility model relates to the technical field of hydrogen energy production, in particular to a gas emptying backwater prevention device. The gas emptying backwater prevention device comprises an emptying pipeline used for emptying gas, a backwater collecting and discharging assembly used for collecting and discharging backwater of the emptying pipeline, and a pipeline opening and closing assembly used for controlling opening and closing of the emptying pipeline. The return water collecting and discharging assembly is installed on the emptying pipeline, and the pipeline opening and closing assembly is installed at an air outlet of the emptying pipeline. The emptying pipeline is connected with a hydrogen production system for hydrogen emptying, the return water collecting and discharging assembly is used for discharging condensate water generated during hydrogen emptying, and the pipeline opening and closing assembly is used for opening the emptying pipeline during hydrogen emptying and closing the emptying pipeline after hydrogen emptying is completed. According to the gas emptying backwater-preventing device, backwater drying and drainage can be carried out on the emptying pipeline, condensate water in the emptying pipeline is effectively removed, and the situation that stable operation of a hydrogen production system is affected by backwater is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of hydrogen energy production, in particular to a gas venting anti-backflow device. Background Technique

[0002] At present, when the hydrogen purity in the hydrogen production project fails to meet the production requirements or during hydrogen debugging, this part of hydrogen will be vented through the hydrogen pipeline. Conventional hydrogen venting only uses a single venting pipeline plus a top rain-proof device. Under the condition of uneven heating, condensate will flow back into the hydrogen production system due to temperature difference, affecting the normal operation of the hydrogen production system.

[0003] The Chinese utility model patent with the publication number of CN209068173U discloses a venting device for flammable and explosive gases, which includes a first gas storage tank, a second gas storage tank, a first venting pipe, a second venting pipe, a three-way joint and a purging pipe. One end of the first venting pipe is connected to the first gas storage tank, and the other end is respectively connected to one end of the second venting pipe and one end of the purging pipe through the three-way joint. There is flammable and explosive gas in the first storage tank, and the other end of the purging pipe is connected to the second gas storage tank, and there is flame-retardant gas in the second gas storage tank. It realizes the working requirements for safely and reliably venting methane and hydrogen in the hydrogen production process.

[0004] The above-mentioned venting device for flammable and explosive gases has the following problems. It uses a first gas storage tank and a second gas storage tank. The first degassing tank is used to store methane and hydrogen, and there is flame-retardant gas in the second gas storage tank. Although it can also realize the venting of methane and hydrogen in the hydrogen production process, its structure is complex, and at the same time, additional flame-retardant gas is required for assistance, resulting in a high use cost. At the same time, there is no device for condensate, and there is still a problem that condensate flows back into the hydrogen production system due to temperature difference. Summary of the Utility Model

[0005] The technical problem to be solved by the utility model is to provide a gas venting anti-backflow device, which can dry and drain the backflow water of the venting pipeline, effectively remove the condensate in the venting pipeline, and prevent the backflow water from affecting the stable operation of the hydrogen production system.

[0006] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0007] A gas venting anti-backflow device includes a venting pipeline for gas venting, a backflow water collection and discharge assembly for collecting and discharging the backflow water of the venting pipeline, and a pipeline opening and closing assembly for controlling the opening and closing of the venting pipeline; the backflow water collection and discharge assembly is installed on the venting pipeline, and the pipeline opening and closing assembly is installed at the gas outlet of the venting pipeline.

[0008] Further, an intake pipe and a reducing pipe are provided at the air inlet of the vent pipe. The input ends of the intake pipe and the reducing pipe are communicated, the output end of the reducing pipe is communicated with the vent pipe, and the reducing pipe is arranged to reduce in diameter towards the vent pipe.

[0009] Further, the return water collection and discharge assembly includes a conical water collecting pipe, a filter screen and an electric control cover plate. The conical water collecting pipe is installed to match the inner wall of the vent pipe, the conical opening of the conical water collecting pipe faces the air outlet of the vent pipe, an installation opening is provided on the vent pipe, the filter screen is installed at the installation opening, the bottom of the filter screen is flush with the bottom of the conical water collecting pipe, and the electric control cover plate is installed on the outer wall of the vent pipe and can completely cover the filter screen.

[0010] Further, the return water collection and discharge assembly further includes a pipe heater, and the pipe heater is installed on the pipe wall of the vent pipe and is located below the conical water collecting pipe.

[0011] Further, a first sealing ring is provided at the position where the electric control cover plate faces the filter screen.

[0012] Further, the pipe opening and closing assembly includes a fixing ring, an automatic telescopic device, a sleeve and a rain shield. The fixing ring is installed on the inner wall of the vent pipe, the bottom of the automatic telescopic device is fixedly connected to the top of the fixing ring, the top of the automatic telescopic device is fixedly connected to the bottom of the sleeve, the top of the sleeve is fixedly connected to the rain shield, and a plurality of air release ports are provided on the sleeve.

[0013] Further, the diameter of the sleeve is smaller than the diameter of the vent pipe.

[0014] Further, the automatic telescopic device includes an electric cylinder and a telescopic rod, and the electric cylinder is drivingly connected to the telescopic rod.

[0015] Further, a second sealing ring is provided at the bottom of the rain shield, and the second sealing ring is arranged to match the vent pipe.

[0016] Further, a controller is further included, and the electric control cover plate, the pipe heater and the automatic telescopic device are all electrically connected to the controller.

[0017] Advantages of the present utility model: The present utility model discloses a gas venting anti-backflow device, which includes a venting pipeline for gas venting, a backwater collection and discharge assembly for collecting and discharging the backwater of the venting pipeline, and a pipeline opening and closing assembly for controlling the opening and closing of the venting pipeline; the backwater collection and discharge assembly is installed on the venting pipeline, and the pipeline opening and closing assembly is installed at the gas outlet of the venting pipeline. The venting pipeline is connected to a hydrogen production system, and is used for venting hydrogen when the hydrogen demand is not met or during debugging. The backwater collection and discharge assembly is used to discharge the condensed water generated during hydrogen venting, preventing the condensed water from flowing back into the hydrogen production system and affecting the normal operation of the hydrogen production system. The pipeline opening and closing assembly is used to open the venting pipeline during hydrogen venting, and close the venting pipeline after the hydrogen venting is completed. The gas venting anti-backflow device of the present application can dry and drain the backwater of the venting pipeline, effectively remove the condensed water in the venting pipeline, and prevent the backwater from affecting the stable operation of the hydrogen production system. Description of the Drawings

[0018] Figure 1 is a schematic structural diagram of the present utility model;

[0019] Figure 2 is a schematic structural diagram of the backwater collection and discharge assembly of the present utility model;

[0020] Figure 3 is a schematic structural diagram of the pipeline opening and closing assembly of the present utility model.

[0021] Description of the reference numerals: venting pipeline 1, inlet pipe 11, reducing pipe 12, backwater collection and discharge assembly 2, pipeline opening and closing assembly 3, fixing ring 31, automatic telescopic device 32, electric cylinder 321, telescopic rod 322, sleeve 33, rain cover 34, second sealing ring 341, conical water collecting pipe 4, filter screen 5, electric control cover plate 6, first sealing ring 61, pipeline heater 7. Detailed Embodiments

[0022] Hereinafter, the exemplary embodiments of the present disclosure will be described in more detail with reference to the drawings. Although the exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present disclosure can be more thoroughly understood and the scope of the present disclosure can be fully conveyed to those skilled in the art.

[0023] It should be understood that the terms used herein are for the purpose of describing particular example embodiments only and are not intended to be limiting. Unless the context clearly dictates otherwise, the singular forms "a", "an" and "the" as used herein may also include the plural. The terms "comprising", "including", "containing" and "having" are inclusive and thus specify the presence of stated features, steps, operations, elements and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components and / or their combinations. Method steps, processes, and operations described herein are not to be construed as necessarily requiring their performance in the particular order described or illustrated, unless an order of performance is explicitly stated. It should also be understood that additional or alternative steps may be used.

[0024] Although the terms first, second, third, etc. may be used herein to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer or section from another. Unless the context clearly indicates otherwise, terms such as "first", "second" and other numerical terms when used herein do not imply an order or sequence. Thus, the first element, component, region, layer or section discussed below may be referred to as the second element, component, region, layer or section without departing from the teachings of the example embodiments.

[0025] For ease of description, spatial relative relation terms may be used herein to describe the relationship of one element or feature shown in the figures to another element or feature, such as "inner", "outer", "inside", "outside", "below", "beneath", "above", "over" and the like. The meaning of such spatial relative relation terms includes different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, an element described as "below" or "beneath" other elements or features will then be oriented "above" or "over" the other elements or features. Thus, the example term "below" can include both an orientation of above and below. The device may be otherwise oriented (rotated 90 degrees or in other directions) and the spatial relative relation descriptors used herein are to be interpreted accordingly.

[0026] Example 1:

[0027] As Figure 1 and Figure 2As shown in the figure, a gas venting anti-backflow device provided in this embodiment includes a venting pipeline 1 for gas venting, a backwater collection and discharge assembly 2 for collecting and discharging the backwater of the venting pipeline 1, and a pipeline opening and closing assembly 3 for controlling the opening and closing of the venting pipeline 1; the backwater collection and discharge assembly 2 is installed on the venting pipeline 1, and the pipeline opening and closing assembly 3 is installed at the gas outlet of the venting pipeline 1. During actual use, when the hydrogen does not meet the demand or during debugging, hydrogen is vented through the venting pipeline 1. Since condensate may flow back into the hydrogen production system due to temperature difference under the condition of uneven heating, the backwater collection and discharge assembly 2 is used to collect and discharge the backwater of the venting pipeline 1. The pipeline opening and closing assembly 3 is used to control the opening and closing of the venting pipeline 1. When hydrogen venting is required, the pipeline opening and closing assembly 3 is opened, and after the venting is completed, the pipeline opening and closing assembly 3 is closed.

[0028] In this embodiment, an intake pipe 11 and a reducing pipe 12 are provided at the intake port of the venting pipeline 1. The input ends of the intake pipe 11 and the reducing pipe 12 are connected, the output end of the reducing pipe 12 is connected to the venting pipeline 1, and the reducing pipe 12 is arranged to reduce the diameter towards the venting pipeline 1. During actual use, hydrogen enters the venting pipeline 1 through the intake pipe 11 and the reducing pipe 12 for venting. By using the reducing pipe 12, the venting speed of hydrogen can be increased, so as to purge the backwater in the venting pipeline 1 through hydrogen.

[0029] In this embodiment, the backwater collection and discharge assembly 2 includes a conical water collecting pipe 4, a filter screen 5 and an electric control cover plate 6. The conical water collecting pipe 4 is installed to match the inner wall of the venting pipeline 1. The conical opening of the conical water collecting pipe 4 faces the gas outlet of the venting pipeline 1. An installation opening is provided on the venting pipeline 1, the filter screen 5 is installed at the installation opening, and the bottom of the filter screen 5 is flush with the bottom of the conical water collecting pipe 4. The electric control cover plate 6 is installed on the outer wall of the venting pipeline 1, and the electric control cover plate 6 can completely cover the filter screen 5. During actual use, the backwater collection and discharge assembly 2 is close to the gas outlet of the venting pipeline 1. Due to the possible temperature difference between the inside and outside of the pipe, the venting pipeline 1 at this place is more likely to generate condensate. Through the conical water collecting pipe 4, the condensate condensed on the inner wall of the venting pipeline 1 will flow down along the pipe wall, and the flowing-down condensate will automatically enter the gap between the conical water collecting pipe 4 and the venting pipeline 1. By opening the electric control cover plate 6, the condensate flows out through the filter screen 5. Since the filter screen 5 is directly in contact with the outside, the filter screen 5 is provided to prevent foreign matters such as dust from entering the venting pipeline 1. The electric control cover plate 6 covers the filter screen 5, closes during the hydrogen venting operation of the venting pipeline 1, opens after the operation of the venting pipeline 1 is completed, and automatically closes after opening for a period of time.

[0030] In this embodiment, the return water collection and discharge assembly 2 further includes a pipeline heater 7, which is installed on the pipe wall of the vent pipe 1 and is located below the conical water collecting pipe 4. During actual use, the pipeline heater 7 is used to heat the vent pipe 1. When hydrogen is vented from the vent pipe 1, the pipeline heater 7 is turned off and does not work. After the hydrogen venting of the vent pipe 1 stops, the pipeline heater 7 works to heat the vent pipe 1, increasing the temperature of a local area of the vent pipe 1, preventing the surrounding water vapor from condensing, and preventing condensed water from flowing back into the vent pipe 1 and the hydrogen production system.

[0031] In this embodiment, a first sealing ring 61 is provided on the electric control cover plate 6 facing the filter screen 5. During actual use, the connection between the electric control cover plate 6 and the filter screen 5 is sealed by the first sealing ring 61 to prevent dust and other debris from accumulating on the filter screen 5.

[0032] Embodiment Two:

[0033] As Figure 1 、 Figure 2 and Figure 3 shown, on the basis of Embodiment One, the pipeline opening and closing assembly 3 includes a fixing ring 31, an automatic telescopic device 32, a sleeve 33, and a rain shield 34. The fixing ring 31 is installed on the inner wall of the vent pipe 1. The bottom of the automatic telescopic device 32 is fixedly connected to the top of the fixing ring 31. The top of the automatic telescopic device 32 is fixedly connected to the bottom of the sleeve 33. The top of the sleeve 33 is fixedly connected to the rain shield 34. A plurality of air vents are provided on the sleeve 33. During actual use, the fixing ring 31 is used for fixing connected devices. The automatic telescopic device 32 is used to drive the sleeve 33 to extend outward or contract inward. Air is vented through the air vents provided on the sleeve 33. The rain shield 34 is used to provide rain protection for the vent pipe 1.

[0034] In this embodiment, the diameter of the sleeve 33 is smaller than the diameter of the vent pipe 1. During actual use, the sleeve 33 is arranged to match the vent pipe 1, and the sleeve 33 can freely pass through the vent pipe 1.

[0035] In this embodiment, the automatic telescopic device 32 includes an electric cylinder 321 and a telescopic rod 322, and the electric cylinder 321 is drivingly connected to the telescopic rod 322. During actual use, the electric cylinder 321 is used to drive the telescopic rod 322 to extend outward or contract inward.

[0036] In this embodiment, a second sealing ring 341 is provided at the bottom of the rain shield 34, and the second sealing ring 341 is arranged to match the vent pipe 1. During actual use, when the rain shield 34 covers the vent pipe 1, the second sealing ring 341 is used to seal the rain shield 34 and the vent pipe 1, preventing external dust and other debris from entering the vent pipe 1.

[0037] In this embodiment, a controller is further included, and the electric control cover plate 6, the pipeline heater 7 and the automatic telescopic device 32 are all electrically connected to the controller. During actual use, the controller is used to control the opening and closing of the electric control cover plate 6, and control the heating time of the pipeline heater 7 and the outward extension or inward contraction of the automatic telescopic device 32.

[0038] All the technical features in this embodiment can be freely combined according to actual needs. The above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention. The technologies, shapes, and structures not described in detail in the present invention are all well-known technologies.

[0039] The above embodiments are the preferred implementation solutions of the present invention. In addition, there are other implementation methods. Any obvious replacement without departing from the concept of the technical solution is within the protection scope of the present invention.

Claims

1. A gas venting anti-backflow device, characterized in that: It includes a vent pipe (1) for gas venting, a return water collection and discharge assembly (2) for collecting and discharging the return water of the vent pipe (1), and a pipe opening and closing assembly (3) for controlling the opening and closing of the vent pipe (1); the return water collection and discharge assembly (2) is installed on the vent pipe (1), and the pipe opening and closing assembly (3) is installed at the air outlet of the vent pipe (1); the return water collection and discharge assembly (2) includes a conical water collecting pipe (4), a filter screen (5) and an electric control cover plate (6), the conical water collecting pipe (4) is installed matching the inner wall of the vent pipe (1), the conical opening of the conical water collecting pipe (4) faces the air outlet of the vent pipe (1), the vent pipe (1) is provided with an installation opening, the filter screen (5) is installed at the installation opening, the bottom of the filter screen (5) is flush with the bottom of the conical water collecting pipe (4), the electric control cover plate (6) is installed on the outer wall of the vent pipe (1), and the electric control cover plate (6) can completely cover the filter screen (5).

2. The gas venting anti-backflow device according to claim 1, wherein: An inlet pipe (11) and a reducing pipe (12) are arranged at the air inlet of the vent pipe (1), the input ends of the inlet pipe (11) and the reducing pipe (12) are communicated, the output end of the reducing pipe (12) is communicated with the vent pipe (1), and the reducing pipe (12) is arranged with a reduced diameter towards the vent pipe (1).

3. The gas venting anti-backflow device according to claim 1, wherein: The return water collection and discharge assembly (2) further includes a pipe heater (7), the pipe heater (7) is installed on the pipe wall of the vent pipe (1), and the pipe heater (7) is located below the conical water collecting pipe (4).

4. A gas venting anti-backflow device according to claim 1, characterized in that: A first sealing ring (61) is arranged on the electric control cover plate (6) towards the filter screen (5).

5. The gas venting anti-backflow device according to claim 3, wherein: The pipe opening and closing assembly (3) includes a fixing ring (31), an automatic telescopic device (32), a sleeve (33) and a rain cover (34), the fixing ring (31) is installed on the inner wall of the vent pipe (1), the bottom of the automatic telescopic device (32) is fixedly connected with the top of the fixing ring (31), the top of the automatic telescopic device (32) is fixedly connected with the bottom of the sleeve (33), the top of the sleeve (33) is fixedly connected with the rain cover (34), and a plurality of air release openings are arranged on the sleeve (33).

6. The gas venting anti-backflow device according to claim 5, characterized in that: The diameter of the sleeve (33) is smaller than the diameter of the vent pipe (1).

7. The gas venting anti-backflow device according to claim 5, characterized in that: The automatic telescopic device (32) includes an electric cylinder (321) and a telescopic rod (322), and the electric cylinder (321) is drivingly connected with the telescopic rod (322).

8. The gas venting anti-backflow device according to claim 5, characterized in that: A second sealing ring (341) is arranged at the bottom of the rain cover (34), and the second sealing ring (341) is arranged matching the vent pipe (1).

9. The gas venting anti-backflow device according to claim 5, wherein: It further includes a controller, and the electric control cover plate (6), the pipe heater (7) and the automatic telescopic device (32) are all electrically connected with the controller.

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