CN214500899U

CN214500899U - Gas discharging device applied to compressed hydrogen

Info

Publication number: CN214500899U
Application number: CN202023120704.2U
Authority: CN
Inventors: 刘晓禹; 张明俊; 张爱国
Original assignee: Beijing Peric Hydrogen Technologies Co ltd
Current assignee: Beijing Peric Hydrogen Technologies Co ltd
Priority date: 2020-12-22
Filing date: 2020-12-22
Publication date: 2021-10-26
Anticipated expiration: 2030-12-22

Abstract

The utility model relates to the technical field of hydrogen production, and discloses a gas discharging device applied to compressed hydrogen, which comprises a box body and a gas discharging assembly arranged in the box body and used for discharging the compressed hydrogen; the air discharging assembly comprises an air discharging main pipeline connected with an inlet and an outlet of the trailer and a pipe valve assembly arranged on the air discharging main pipeline; the pipe valve assembly comprises an air unloading needle valve, a filter, a mass flow meter, a pneumatic ball valve and a first one-way valve which are sequentially arranged along the flowing direction of air. The utility model discloses in through set up in the device of unloading gas and unload gas main line and pipe valve subassembly, can realize the function that compressed hydrogen unloads gas reliably, can adapt to the high-speed development of the hydrogen energy and improve the security to the hydrogen energy utilization, its overall structure is simple, the function is reliable also easily to be realized.

Description

Gas discharging device applied to compressed hydrogen

Technical Field

The utility model relates to a hydrogen manufacturing technical field, more specifically say, in particular to be applied to gas discharging device of compressed hydrogen.

Background

Energy is a material basis for social existence and development, and along with the process of industrialization and the improvement of living standard of people, the demand on energy is increasing day by day. The modern industry depends on limited reserves of fossil fuels, non-renewable and environmental pollution in use, so that the search for renewable green energy sources is urgent. The green hydrogen energy is generated by electrolyzing water with 'waste electricity', and is converted into usable electric energy by a hydrogen fuel cell. Therefore, hydrogen energy is a clean and efficient secondary energy source, and is considered as an ideal energy source for replacing the traditional fossil fuel.

After the hydrogen of the hydrogen production station is pressurized by a compressor, the pressure is 20 to 25MPa, the hydrogen is dehydrated at high pressure and depth, the hydrogen is filled and enters a long tube trailer of a high-pressure steel cylinder group for storage, the hydrogen is transported to a hydrogenation station far away from the hydrogen production station, a gas unloading device is needed by long tube trailer transportation, the tank wagon and a gas unloading pipeline are connected through a high-pressure rubber tube after the hydrogen arrives at the site, and the compressed hydrogen in the long tube trailer is unloaded into a pressure regulating device.

At present, the hydrogen energy source is in a high-speed development period, and the requirement of a gas discharging device is increased day by day. Hydrogen has great insecurity and is extremely easy to explode, so the gas discharging device is required to have good explosion-proof performance; the hydrogen fuel cell has higher requirements on the hydrogen concentration, so the gas discharging device has good sealing performance and has a pipeline purging function; hydrogen molecules are small, so that hydrogen embrittlement is easy to occur, and the material of the gas discharging device is greatly limited; meanwhile, various pipe valves, flowmeters and the like are required to be matched in order to meet multiple functions.

Disclosure of Invention

An object of the utility model is to the technical problem that prior art exists, a be applied to compressed hydrogen's gas discharging device is provided, can adapt to the high-speed development of the hydrogen energy and improve the security to the utilization of hydrogen energy, satisfy the multiple functional requirement to the gas discharging device simultaneously.

In order to solve the problem provided above, the utility model discloses a technical scheme be:

the utility model provides an air discharging device applied to compressed hydrogen, which comprises a box body and an air discharging assembly arranged in the box body and used for discharging the compressed hydrogen;

the air discharging assembly comprises an air discharging main pipeline connected with an inlet and an outlet of the trailer and a pipe valve assembly arranged on the air discharging main pipeline; the pipe valve assembly comprises an air unloading needle valve, a filter, a mass flow meter, a pneumatic ball valve and a first one-way valve which are sequentially arranged along the flowing direction of air.

Furthermore, the main gas discharging pipeline behind the pneumatic ball valve is divided into two branches which are communicated to the outlet of the compressor and the direct charging port, and the two branches are respectively provided with a one-way valve.

Furthermore, a nitrogen replacement pipeline, an emptying pipeline and a pressure gauge pipeline are further arranged on the gas discharge main pipeline and between the filter and the mass flow meter.

Furthermore, the nitrogen displacement pipeline starts from a nitrogen displacement purge port of the box body, and converges into a gas discharge main pipeline between the filter and the mass flow meter, and is sequentially provided with a first needle valve and a second one-way valve.

Further, an inlet of the emptying pipeline is connected to the gas discharging main pipeline between the filter and the mass flow meter and is connected with a main emptying port on the box body.

Furthermore, the emptying pipeline adopts double pipelines to empty in parallel, the inlet of the first emptying branch is close to the filter, and an emptying needle valve is arranged on the inlet of the first emptying branch; and the inlet of the second emptying branch is close to the mass flowmeter and is provided with a second needle valve and a safety valve.

Furthermore, the inlet of the pressure gauge pipeline is connected to the gas discharge main pipeline between the filter and the mass flow meter and is connected with a pressure gauge, and the pressure gauge pipeline is also provided with a pressure sensor.

Further, an inlet of the instrument gas pipeline is connected with an instrument gas inlet on the box body, and an outlet of the instrument gas pipeline is connected with the pneumatic ball valve; and the instrument air pipeline is provided with an electromagnetic valve connected with the pneumatic ball valve.

Furthermore, the main gas discharge pipeline adopts an 3/4in diameter pipeline, the nitrogen displacement pipeline, the emptying pipeline and the instrument gas pipeline all adopt 3/8in diameter pipelines, and the pressure gauge pipeline adopts a 1/4in diameter pipeline.

Furthermore, an explosion-proof electrical box is arranged in the box body and used for transmitting electrical signals of the mass flow meter, the electromagnetic valve and the pressure sensor.

Compared with the prior art, the beneficial effects of the utility model reside in that:

the utility model discloses in through set up in the device of unloading gas and unload gas main line and pipe valve subassembly, can realize the function that compressed hydrogen unloads gas reliably, can adapt to the high-speed development of the hydrogen energy and improve the security to the hydrogen energy utilization, its overall structure is simple, the function is reliable also easily to be realized.

Drawings

In order to illustrate the solution of the present invention more clearly, the drawings needed for describing the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts. Wherein:

fig. 1 is a schematic diagram of the pipeline layout of the gas discharging device applied to the compressed hydrogen of the present invention.

Fig. 2 is a schematic view of the upper pipe orifice of the box body in the gas discharging device of the utility model.

Fig. 3 is the schematic view of the actual installation of the gas discharging device of the present invention.

The reference numerals are explained below: 1. a trailer inlet; 2. a gas discharge needle valve; 3. a filter; 4. a mass flow meter; 5. a pneumatic ball valve; 6. a first check valve; 7. an explosion-proof electrical box; 8. a first needle valve; 9. a second one-way valve; 10. a second needle valve; 11. a safety valve; 12. a pressure sensor; 13. emptying the needle valve; 14. A pressure gauge; 15. an electromagnetic valve; 16-box body.

Detailed Description

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs; the terminology used herein in the description is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention, for example, the terms "length," "width," "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," "outer," etc. refer to an orientation or position illustrated in the drawings, which are for convenience of description only and are not to be construed as limiting of the present disclosure.

The terms "including" and "having," and any variations thereof, in the description and claims of this invention and the description of the above figures are intended to cover non-exclusive inclusions; the terms "first," "second," and the like in the description and in the claims, or in the drawings, are used for distinguishing between different objects and not necessarily for describing a particular sequential or chronological order. In the description and claims of the present invention and in the description of the above figures, when an element is referred to as being "fixed" or "mounted" or "disposed" or "connected" to another element, it can be directly or indirectly located on the other element. For example, when an element is referred to as being "connected to" another element, it can be directly or indirectly connected to the other element.

Furthermore, reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the invention. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.

Referring to fig. 1 and 2, an embodiment of the present invention provides an air discharging device for compressed hydrogen, including a box 16, and an air discharging assembly disposed in the box 16, for discharging compressed hydrogen.

The gas discharging assembly comprises a gas discharging main pipeline and a pipe valve assembly, the gas discharging main pipeline is connected with the inlet 1 and the outlet of the trailer, and the pipe valve assembly is arranged on the gas discharging main pipeline. The pipe valve assembly comprises an air discharge needle valve 2, a filter 3, a mass flow meter 4, a pneumatic ball valve 5 and a first one-way valve 6 which are sequentially arranged along the air flow direction of the air discharge main pipeline.

Specifically, unload gas needle valve 2 be used for right it unloads gas to unload the gas main line and carry out manual control, pneumatic ball valve 5 is used for carrying out automatic control, mass flow meter 4 is used for the hydrogen total amount of measurement consumption, first check valve 6 is used for controlling hydrogen flow direction. The leakage of natural gas can be effectively avoided by arranging the pipe valve assembly, the occurrence of dangerous conditions is avoided, and the pipe valve assembly has higher application and popularization values.

According to the embodiment, the main gas discharge pipeline is an 3/4in diameter pipeline, the wall thickness of the main gas discharge pipeline is 2.44mm, the pressure resistance is 32.8MPa, and the requirements on flow and pressure resistance can be met. The air discharge needle valve 2 adopts an 3/4-diameter needle valve, the first check valve 6 adopts a 3/4-diameter check valve, and the working reliability of the air discharge device can be ensured. Specifically, the pipeline in the air unloading device is started from 1/2in trailer inlet 1 to 3/4in air unloading main pipeline to 3/4in air unloading main pipeline to the compressor outlet, the inlet of the air unloading main pipeline is the trailer inlet 1, and the outlet is divided into the compressor outlet and the direct charging port according to the purpose.

According to the above embodiment, further, the main gas discharge pipeline after the pneumatic ball valve 5 is divided into two branches leading to the decompression port and the direct charging port, and the two branches are respectively provided with the first check valve 6 with 3/4 diameters.

According to the above-mentioned embodiment, further, unload and be located on the gas main line still set up nitrogen gas replacement pipeline, unloading pipeline and manometer pipeline between filter 3 and the mass flow meter 4, in the embodiment of the utility model, nitrogen gas replacement pipeline, unloading pipeline and manometer pipeline three can any order connect unload on the gas main line, all do not influence the utility model discloses the realization of purpose.

According to the above embodiment, further, the nitrogen replacement pipeline adopts an 3/8in diameter pipeline, and the nitrogen replacement pipeline starts from the nitrogen replacement purge port of the box 16 and is merged into the main gas discharge pipeline between the filter 3 and the mass flow meter 4. And a first needle valve 8 and a second one-way valve 9 are sequentially arranged on the nitrogen replacement pipeline. Can be favorable to guaranteeing hydrogen purity through setting up nitrogen gas replacement pipeline, avoid the dangerous condition to take place. Specifically, the first needle valve 8 is an 3/8-diameter needle valve, and the second check valve 9 is a 3/8-diameter check valve, so that the requirements of pipelines during working can be met.

According to the above embodiment, further, the vent line is an 3/8in diameter line, and its inlet is connected to the main gas discharge line between the filter 3 and the mass flow meter 4 and is connected to the total vent on the box 16 in fig. 2.

Further, the emptying pipeline adopts double pipelines to empty in parallel, the inlet of the first emptying branch is close to the filter 3, and an emptying needle valve 13 is arranged. The inlet of the second emptying branch is close to the mass flowmeter 4 and is provided with a second needle valve 10 and a safety valve 11. Through setting up the unloading pipeline can effectively avoid because the pipe valve spare that high pressure hydrogen pressure leads to damages to avoid the dangerous condition to take place, and guaranteed the security of unloading the pipeline. Specifically, the emptying needle valve 13 adopts a needle valve with the diameter of 3/8, so that the requirement of the pipeline during working can be met.

According to the above embodiment, further, the pressure gauge pipeline is an 1/4in diameter pipeline, the inlet of the pressure gauge pipeline is connected to the gas discharge main pipeline between the filter 3 and the mass flow meter 4, and the pressure gauge 14 is connected to the pressure gauge pipeline, and the pressure sensor 12 is further arranged on the pressure gauge pipeline.

According to the above embodiment, further, the instrument gas pipeline is an 3/8in diameter pipeline, the inlet of the instrument gas pipeline is connected to the instrument gas inlet on the box 16, and the outlet of the instrument gas pipeline is connected to the pneumatic ball valve 5. And the instrument air pipeline is provided with an electromagnetic valve 15 connected with the pneumatic ball valve 5. The instrument air pipeline provides the drive gas for the pneumatic valve of whole gas discharge device, and the air supply adopts nitrogen gas collection dress check air feed for compressed nitrogen gas, and the pressure signal of instrument wind system needs real-time acquisition, monitoring, and abnormal conditions need timely early warning.

In the embodiment of the utility model, the service pressure of the nitrogen gas replacement pipeline and the emptying pipeline is within 25MPa, and the requirement on the flow is not large, so that 3/8in diameter pipeline is adopted, and the wall thickness is 0.049 mm; the pressure gauge pipeline has smaller requirement on the flow, so that 1/4in diameter pipelines are adopted, and the wall thickness is 0.035 mm.

According to the above embodiment, further, the explosion-proof electric box 7 is also arranged inside the box body 16, and is used for electric signal transmission of the mass flow meter 4, the electromagnetic valve 15 and the pressure sensor 12, so that the safety and reliability of the whole gas unloading device can be ensured.

According to the embodiment, the gas discharge main pipeline is made of stainless steel, particularly SS316, so that hydrogen embrittlement can be prevented.

In the embodiment of the utility model, the pipe valve component has the characteristics of good sealing and little leakage, and the leakage grade is not lower than the requirement of national standard GB 50516 technical Specification of hydrogenation stations. The structural design, materials and pipe fitting selection of the pipe valve assembly must consider the functions of hydrogen embrittlement resistance, scouring resistance and noise reduction. The pipe valve assembly and the connection form thereof are strictly executed according to corresponding design specifications, and the connection form is strictly distinguished to ensure the corresponding connection of components.

The embodiment of the utility model provides an in, when unloading the device actual installation, adopt the pre-buried hole mounting means in bottom, as shown in figure 3, box 16 still reserves 4 mounting holes through the bolt hole of bottom installation on the concrete foundation bottom box 16 bottom, adopts M14's rag bolt to fix, its convenient and reliable.

The embodiment of the utility model provides an unload gas device, its operating pressure is 0 ~ 20MPa, and the exit temperature is less than or equal to 60 ℃, has 1 hydrogen long-tube trailer interface on the box 16 to be provided with mass flow meter 4, can measure the total amount of hydrogen that whole station consumed; the box body 16 is provided with a replacement purging port, is connected with a nitrogen replacement pipeline and is provided with a check valve and a full-open type safety valve, and the whole structure is simple, the function is reliable and the realization is easy.

The embodiment of the utility model provides an in, unload before the gas device begins work, need use nitrogen gas to sweep the pipeline, promptly nitrogen gas replacement pipeline work:

(1) checking and confirming that the pressure of an external nitrogen instrument connected with the nitrogen replacement purge port is not more than 0.8 MPa;

(2) checking and ensuring that the first needle valve 8 for air intake of the nitrogen replacement pipeline is in a closed state;

(3) when nitrogen purging is performed, the first needle valve 8 is opened, and nitrogen is introduced into the pipeline from the nitrogen replacement purging port for purging.

The gas unloading process of the gas unloading device is as follows:

(1) the outlet valve of the long tube trailer needing to be unloaded is connected with the inlet 1 (namely the air unloading port) of the trailer on the air unloading device through an air unloading hose.

(2) The replacement unloads the gas pipeline, discharges promptly and unloads the nitrogen gas that nitrogen gas purged in the gas device pipeline, specifically is:

confirming that all valves are in a closed state, opening the outlet valve of the long-tube trailer, slowly and slightly opening the gas discharge needle valve 2, observing the value of a pressure gauge 14 or a pressure sensor 12, closing the gas discharge needle valve 2 when the hydrogen pressure of the pipeline reaches 1Mpa, and then opening the gas discharge needle valve 13 to exhaust nitrogen.

The operation is carried out for at least 3 times to ensure that the purity of the hydrogen in the gas discharging device is qualified, and the emptying needle valve 13 is closed after the hydrogen is qualified.

(3) Slowly open the needle valve 2 of unloading, check that the long-tube trailer outlet valve is in the open mode, unload gas to long-tube trailer. The pressure gauge 14 and the pressure sensor 12 are checked to determine whether the pressure in the pipeline of the gas discharging device meets the requirement (generally between 5 and 20 MPa).

(4) After the pressure in the pipeline meets the requirement, the electromagnetic valve 15 controls the pneumatic ball valve 5 to open, so that the hydrogen in the pipeline enters the compressor through the compressor opening, or directly enters the device meeting the pressure requirement through the straight charging opening of the long-tube trailer in the figure 2, and is used as a low-pressure hydrogen source for primary charging.

Since the relief valve 11 is provided, which sets the opening pressure at 22Mpa, if the second needle valve 10 is closed, the relief valve 11 can be removed for verification without affecting the normal operation of the apparatus. The pneumatic ball valve 5 also has a safety function of emergency shut-off.

(5) After the hydrogen pressure in the long-tube trailer is lower than 5MPa, the trailer needs to be unloaded and replaced and used, and the method specifically comprises the following steps:

before replacement, the hydrogen compressor is confirmed to be stopped, and all valves on the pipe trailer are closed. The pneumatic ball valve 5 of the gas discharge device is closed, the vent needle valve 13 is opened to exhaust the hydrogen in the pipeline, and then the vent valve 13 and the gas discharge needle valve 2 are closed. And finally, slowly loosening the connection between the air-discharging hose and the long-tube trailer, and fixedly hanging the air-discharging hose on a side hook of the air-discharging device box body 16.

The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be equivalent replacement modes, and all are included in the scope of the present invention.

Claims

1. The utility model provides an unload gas device for compressed hydrogen which characterized in that: the device comprises a box body and an air discharging assembly arranged in the box body and used for discharging compressed hydrogen;

2. An air-discharging device for compressed hydrogen as claimed in claim 1, wherein: the main gas discharging pipeline behind the pneumatic ball valve is divided into two branches which are communicated to the outlet of the compressor and the direct charging port, and the two branches are respectively provided with a first one-way valve.

3. An unloading device for compressed hydrogen as claimed in claim 2, wherein: and a nitrogen replacement pipeline, an emptying pipeline and a pressure gauge pipeline are also arranged on the gas discharge main pipeline and between the filter and the mass flow meter.

4. An air-discharging device for compressed hydrogen as claimed in claim 3, characterized in that: the nitrogen displacement pipeline starts from a nitrogen displacement purging port of the box body, and is converged into a gas discharging main pipeline between the filter and the mass flow meter, and a first needle valve and a second one-way valve are sequentially arranged.

5. An air-discharging device for compressed hydrogen as claimed in claim 3, characterized in that: and the inlet of the emptying pipeline is connected to the gas discharging main pipeline between the filter and the mass flow meter and is connected with a main emptying port on the box body.

6. An air-discharging device for compressed hydrogen as claimed in claim 3, characterized in that: the emptying pipeline adopts double pipelines to empty in parallel, the emptying pipeline comprises a first emptying branch and a second emptying branch, and an inlet of the first emptying branch is close to the filter and is provided with an emptying needle valve; and the inlet of the second emptying branch is close to the mass flowmeter and is provided with a second needle valve and a safety valve.

7. An air-discharging device for compressed hydrogen as claimed in claim 6, wherein: the inlet of the pressure gauge pipeline is connected to the gas discharge main pipeline between the filter and the mass flow meter and is connected with a pressure gauge, and the pressure gauge pipeline is also provided with a pressure sensor.

8. An air-discharging device for compressed hydrogen as claimed in claim 7, wherein: an instrument gas inlet on the box body is connected with an instrument gas pipeline, and an outlet of the instrument gas pipeline is connected to the pneumatic ball valve; and the instrument air pipeline is provided with an electromagnetic valve connected with the pneumatic ball valve.

9. An air-discharging device for compressed hydrogen as claimed in claim 8, wherein: the main gas discharging pipeline adopts 3/4in diameter pipelines, the nitrogen replacement pipeline, the emptying pipeline and the instrument gas pipeline all adopt 3/8in diameter pipelines, and the pressure gauge pipeline adopts 1/4in diameter pipelines.

10. An air-discharging device for compressed hydrogen as claimed in claim 9, wherein: and an explosion-proof electrical box is also arranged in the box body and used for transmitting electrical signals of the mass flow meter, the electromagnetic valve and the pressure sensor.