阅读说明：本技术 一种掺氢燃气立管结构及其控制方法 (Hydrogen-doped gas vertical pipe structure and control method thereof ) 是由 陈亚琦 许克良 陈健 付泽剑 晏翔 肖庭 于 2021-08-26 设计创作，主要内容包括：本发明涉及一种掺氢燃气立管结构及其控制方法,包括输气管路、循环组件和多个用户端；所述输气管路包括送气管、立管和回流管,所述送气管上安装有止回阀,所述送气管的一端外接氢气和天然气的混合气源,所述送气管的一端与所述立管的底端相连通,所述立管的顶端与所述回流管的一端相连通,所述送气管与所述立管的连接处与所述止回阀之间存在一连接口,所述回流管的另一端与所述连接口相连通；所述循环组件设于所述回流管上,用于驱使所述立管和所述回流管内的气流循环流动；多个所述用户端沿所述立管的长度方向依次设置、且均与所述立管相连通；解决氢气和天然气的密度不同,位于输送气体的立管中的氢气和天然气的混合气体容易分层的问题。(The invention relates to a hydrogen-doped gas vertical pipe structure and a control method thereof, wherein the hydrogen-doped gas vertical pipe structure comprises a gas transmission pipeline, a circulation component and a plurality of user sides; the gas transmission pipeline comprises a gas transmission pipe, a vertical pipe and a return pipe, wherein a check valve is installed on the gas transmission pipe, one end of the gas transmission pipe is externally connected with a mixed gas source of hydrogen and natural gas, one end of the gas transmission pipe is communicated with the bottom end of the vertical pipe, the top end of the vertical pipe is communicated with one end of the return pipe, a connecting port is formed between the connecting part of the gas transmission pipe and the vertical pipe and the check valve, and the other end of the return pipe is communicated with the connecting port; the circulating assembly is arranged on the return pipe and used for driving the airflow in the vertical pipe and the return pipe to circularly flow; the plurality of user sides are sequentially arranged along the length direction of the vertical pipe and are communicated with the vertical pipe; the problem that the mixed gas of the hydrogen and the natural gas in a vertical pipe for conveying the gas is easy to separate due to different densities of the hydrogen and the natural gas is solved.)

1. A hydrogen-doped gas vertical pipe structure is characterized by comprising a gas transmission pipeline, a circulation component and a plurality of user sides;

the gas transmission pipeline comprises a gas transmission pipe, a vertical pipe and a return pipe, wherein a check valve is installed on the gas transmission pipe, one end of the gas transmission pipe is externally connected with a mixed gas source of hydrogen and natural gas, one end of the gas transmission pipe is communicated with the bottom end of the vertical pipe, the top end of the vertical pipe is communicated with one end of the return pipe, a connecting port is formed between the connecting part of the gas transmission pipe and the vertical pipe and the check valve, and the other end of the return pipe is communicated with the connecting port;

the circulating assembly is arranged on the return pipe and used for driving the airflow in the vertical pipe and the return pipe to circularly flow;

a plurality of the user ends are sequentially arranged along the length direction of the vertical pipe and are communicated with the vertical pipe.

2. The hydrogen-loaded gas riser structure according to claim 1, wherein the length direction of the riser is set along the building height.

3. The hydrogen-loaded gas vertical pipe structure as claimed in claim 1, wherein the return pipe is a vertical pipe, and the top of the return pipe is communicated with the top end of the vertical pipe through a U-shaped elbow.

4. The hydrogen-loaded gas riser structure of claim 1, wherein the check valve is open when the source of mixed gas enters the riser and closed when no source of mixed gas enters the riser.

5. The hydrogen-loaded gas riser structure of claim 1, wherein the circulation component is a blower, and the blower is disposed in the return pipe for sucking the gas in the riser pipe into the return pipe and blowing the gas back into the riser pipe.

6. A method for controlling a hydrogen-loaded gas riser structure, which is applied to the hydrogen-loaded gas riser structure of any one of claims 1 to 5, and which comprises the following steps:

when the hydrogen and the natural gas in the vertical pipe are layered, the circulating assembly works intermittently;

so that the gas between the vertical pipe and the return pipe flows circularly, and the hydrogen is fully mixed with the natural gas.

7. The method of claim 6, wherein the time of use of the customer end comprises peak use periods and low use periods, the peak use periods are morning, noon and evening when the hydrogen and natural gas in the riser are stratified, and the low use periods are the rest of the day except the peak use periods.

8. The hydrogen-loaded gas riser configuration control method of claim 6, wherein the circulation assembly has an active state and an inactive state, when the circulation assembly is in the active state, gas circulates between the riser and the return line, when the circulation assembly is in the inactive state, gas in the riser stagnates and hydrogen and natural gas tend to stratify, and the time that the circulation assembly is in the inactive state is less than the time required for complete stratification of hydrogen and natural gas.

9. The method of claim 8, further comprising a control assembly for driving the circulation assembly to move between the operating state and the non-operating state;

the control assembly comprises an airflow sensor and an information processor, the airflow sensor is electrically connected with the information processor, the information processor is electrically connected with the circulating assembly, the detection end of the airflow sensor is arranged in the air supply pipe, the airflow sensor is located at one side, away from the connecting port, of the check valve, the airflow sensor is used for detecting whether a mixed gas source of hydrogen and natural gas enters one end of the air supply pipe or not, when the mixed gas source enters, the information processor controls the circulating assembly to be always in the non-working state, and when the mixed gas source does not enter, the information processor controls the circulating assembly to be switched between the working state and the non-working state in a reciprocating mode.

10. The method as claimed in claim 9, wherein a differential pressure power generation type pressure regulator is installed in the gas pipe, the differential pressure power generation type pressure regulator is disposed between the gas flow sensor and the check valve, the control assembly further comprises a battery, the battery is electrically connected to the differential pressure power generation type pressure regulator, and the battery is electrically connected to the information processor, so that electric energy generated by the differential pressure power generation type pressure regulator is stored in the battery and supplied to the information processor to operate.

Technical Field

The invention relates to the technical field of gas pipelines, in particular to a hydrogen-doped gas vertical pipe structure and a control method thereof.

Background

The hydrogen-doped natural gas is mainly used as commercial or civil gas fuel, and can solve the problem of large-scale transportation of hydrogen energy. At present, most of existing end-user burners are designed on the basis of natural gas and liquefied petroleum gas, and if hydrogen is directly used as fuel, the gas burners need to be replaced and a hydrogen conveying pipeline needs to be laid, so that the use cost is too high. The hydrogen is mixed into the existing natural gas pipe network, so that the energy can be greatly borne, and meanwhile, the carbon emission of the natural gas can be further reduced by the hydrogen mixing of the natural gas pipe network.

For example, CN202011477933.1 a hydrogen-loaded natural gas transportation separation system and a control method thereof, fills up the blank of domestic natural gas pipeline hydrogen-loading specification and standard by adding hydrogen into natural gas for use.

However, natural gas use has a peak use stage and a low peak use stage, when natural gas is in the low peak use stage, due to different densities of hydrogen and natural gas, a mixed gas of hydrogen and natural gas in a vertical pipe for conveying gas is easy to stratify, a part of the vertical pipe at a high floor is filled with hydrogen, and a part of the vertical pipe at a middle-low floor is filled with natural gas, so that safety accidents are easily caused if the vertical pipe is directly used.

Disclosure of Invention

In view of the above, there is a need for a hydrogen-doped gas vertical pipe structure and a control method thereof, which are used to solve the problem that the mixed gas of hydrogen and natural gas in the vertical pipe for transporting gas is easy to separate due to different densities of hydrogen and natural gas.

The invention provides a hydrogen-doped gas vertical pipe structure, which comprises a gas transmission pipeline, a circulation component and a plurality of user sides; the gas transmission pipeline comprises a gas transmission pipe, a vertical pipe and a return pipe, wherein a check valve is installed on the gas transmission pipe, one end of the gas transmission pipe is externally connected with a mixed gas source of hydrogen and natural gas, one end of the gas transmission pipe is communicated with the bottom end of the vertical pipe, the top end of the vertical pipe is communicated with one end of the return pipe, a connecting port is formed between the connecting part of the gas transmission pipe and the vertical pipe and the check valve, and the other end of the return pipe is communicated with the connecting port; the circulating assembly is arranged on the return pipe and used for driving the airflow in the vertical pipe and the return pipe to circularly flow; a plurality of the user ends are sequentially arranged along the length direction of the vertical pipe and are communicated with the vertical pipe.

Further, the length direction of the vertical pipe is arranged along the height of the building.

Furthermore, the return pipe is a vertical pipe, and the top of the return pipe is communicated with the top end of the vertical pipe through a U-shaped elbow.

Further, the check valve is open when the mixed gas source enters the riser and closed when no mixed gas source enters the riser.

Further, the circulation component is a fan, and the fan is arranged in the return pipe and used for sucking the gas in the stand pipe into the return pipe and blowing the gas into the stand pipe again.

The invention also provides a control method of the hydrogen-doped gas vertical pipe structure, which comprises the following steps:

s1, when the hydrogen and the natural gas in the vertical pipe are layered, the circulating assembly works intermittently;

s2 to circulate the gas between the riser and the return line, the hydrogen is thoroughly mixed with the natural gas.

Further, the service time of the user side comprises a peak service time and a low service time, the peak service time is when the hydrogen and the natural gas in the riser are layered, the peak service time is morning, noon and evening, and the low service time is the rest of the day except the peak service time.

Further, the circulation module has an operating state and a non-operating state, when the circulation module is in the operating state, the gas between the riser and the return pipe circulates, when the circulation module is in the non-operating state, the gas in the riser stagnates and the hydrogen and the natural gas tend to be in the layered state, and the time for which the circulation module is in the non-operating state is shorter than the time for which the hydrogen and the natural gas are completely layered.

Furthermore, the structure also comprises a control component, wherein the control component is used for driving the circulating component to be switched between the working state and the non-working state in a reciprocating way;

the control assembly comprises an airflow sensor and an information processor, the airflow sensor is electrically connected with the information processor, the information processor is electrically connected with the circulating assembly, the detection end of the airflow sensor is arranged in the air supply pipe, the airflow sensor is located at one side, away from the connecting port, of the check valve, the airflow sensor is used for detecting whether a mixed gas source of hydrogen and natural gas enters one end of the air supply pipe or not, when the mixed gas source enters, the information processor controls the circulating assembly to be always in the non-working state, and when the mixed gas source does not enter, the information processor controls the circulating assembly to be switched between the working state and the non-working state in a reciprocating mode.

Further, install pressure differential electricity generation formula voltage regulator in the air feed pipe, pressure differential electricity generation formula voltage regulator locates airflow sensor with between the check valve, the control assembly still includes a battery, the battery with pressure differential electricity generation formula voltage regulator electric connection, the battery with information processor electric connection, with the via the electric energy storage that pressure differential electricity generation formula voltage regulator electricity generation produced extremely in the battery, and supply with information processor work.

Compared with the prior art, the gas transmission pipeline comprises a gas transmission pipe, a vertical pipe and a return pipe, the gas transmission pipe is provided with a check valve, one end of the gas transmission pipe is externally connected with a mixed gas source of hydrogen and natural gas, one end of the gas transmission pipe is communicated with the bottom end of the vertical pipe, the top end of the vertical pipe is communicated with one end of the return pipe, a connecting port is arranged between the connecting part of the gas transmission pipe and the vertical pipe and the check valve, the other end of the return pipe is communicated with the connecting port, and a circulating assembly is arranged on the return pipe and used for driving the gas flow in the vertical pipe and the return pipe to circularly flow, so that the phenomenon that the hydrogen and the natural gas are layered in the vertical pipe can be effectively prevented, and safety accidents are avoided;

meanwhile, by the control method of the structure of the hydrogen-doped gas vertical pipe, when the hydrogen and the natural gas in the vertical pipe are layered, the circulating assembly works intermittently, so that the gas between the vertical pipe and the return pipe flows circularly, the hydrogen and the natural gas are fully mixed, the natural gas and the hydrogen can be effectively prevented from being layered in the vertical pipe, and safety accidents are avoided.

Drawings

FIG. 1 is a schematic structural view of the hydrogen-loaded gas riser structure according to the present invention;

FIG. 2 is a schematic diagram of a method for controlling a hydrogen-loaded gas riser structure according to the present invention.

Detailed Description

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate preferred embodiments of the invention and together with the description, serve to explain the principles of the invention and not to limit the scope of the invention.

As shown in fig. 1, the hydrogen-loaded gas riser pipe structure in this embodiment includes a gas transmission pipeline 100, a circulation assembly 200, and a plurality of user terminals 400, wherein the gas transmission pipeline 100 is used for transmitting a mixed gas source of hydrogen and natural gas to the plurality of user terminals 400, and the circulation assembly 200 can prevent the hydrogen and natural gas in the transmission pipeline from layering, which will be explained and explained in more detail below.

The gas pipeline 100 in this embodiment includes a gas supply pipe 110, a vertical pipe 120 and a return pipe 130, wherein the gas supply pipe 110 is provided with a check valve 112, one end of the gas supply pipe 110 is externally connected with a mixed gas source of hydrogen and natural gas, one end of the gas supply pipe 110 is communicated with the bottom end of the vertical pipe 120, the top end of the vertical pipe 120 is communicated with one end of the return pipe 130, a connection port exists between the connection position of the gas supply pipe 110 and the vertical pipe 120 and the check valve 112, and the other end of the return pipe 130 is communicated with the connection port.

The delivery pipe 110 is used for delivering a mixed gas source of hydrogen and natural gas to the riser 120, the check valve 112 is provided to make the gas flow in the delivery pipe 110 unidirectional, the riser 120 is used for delivering the mixed gas source to a plurality of user terminals 400, and the return pipe 130 is provided to form a return channel with the riser 120 for circulating the gas between the return pipe 130 and the riser 120.

Circulation assembly 200 in this embodiment is disposed in return line 130 for circulating the gas stream within riser 120 and return line 130.

Wherein gas is circulated between return line 130 and riser 120 by providing circulation assembly 200.

The plurality of user terminals 400 in this embodiment are sequentially disposed along the length direction of the vertical pipe 120 and are all communicated with the vertical pipe 120.

It is to be understood that the user terminal 400 is a structure of a gas range, etc. in a building, which requires the use of a mixed gas of hydrogen and natural gas, as will be appreciated by those skilled in the art, and will not be illustrated and described herein too much.

The length direction of the riser 120 in this embodiment is set along the building height.

In this embodiment, the return pipe 130 is a vertical pipe, and the top of the return pipe 130 is connected to the top of the vertical pipe 120 via a U-shaped elbow.

In this embodiment, check valve 112 is open when a mixed gas source enters standpipe 120, and check valve 112 is closed when no mixed gas source enters standpipe 120.

The circulation component 200 in this embodiment is a blower, which is disposed in the return pipe 130 and is used to suck the gas in the stand pipe 120 into the return pipe 130 and to blow the gas back into the stand pipe 120.

It will be appreciated that the direction of the fan air supply is not limited, for example, air may be drawn from the top of the riser 120, through the return conduit 130 and re-blown from the bottom of the riser 120; air may also be drawn from the bottom end of riser 120 and the air flow re-blown through return line 130 and from the top end of riser 120.

The working process is as follows: when the gas supply in the vertical pipe 120 is stopped, the hydrogen and the natural gas in the vertical pipe 120 are easy to generate the layering phenomenon, and the wind is started to enable the gas in the vertical pipe 120 to circularly flow between the vertical pipe 120 and the return pipe 130, so that the hydrogen and the natural gas are effectively mixed together, and the layering phenomenon of the hydrogen and the natural gas can be avoided.

Compared with the prior art: through setting up gas pipeline 100 and including supply pipe 110, riser 120 and back flow pipe 130, install check valve 112 on the supply pipe 110, the external hydrogen of one end of supply pipe 110 and the mixed gas source of natural gas, the one end of supply pipe 110 is linked together with the bottom of riser 120, the top of riser 120 is linked together with the one end of back flow pipe 130, there is a connector between supply pipe 110 and the junction of riser 120 and check valve 112, the other end and the connector of back flow pipe 130 are linked together, circulation subassembly 200 is located on back flow pipe 130, an air current circulation flow for driving in riser 120 and the back flow pipe 130, can effectually prevent that layering phenomenon from appearing in riser 120 with the natural gas, avoid the emergence of incident.

As shown in fig. 2, the method for controlling the structure of the hydrogen-loaded gas vertical pipe 120 in the present embodiment includes the following steps:

s1, when stratification of hydrogen and natural gas in the riser 120 occurs, the circulation assembly 200 intermittently operates;

s2 to circulate the gas between riser 120 and return line 130, the hydrogen is thoroughly mixed with the natural gas.

By intermittently controlling the operation of the circulation assembly 200, the hydrogen and the natural gas in the riser 120 cannot be layered, and the gas used by the user end 400 is a mixed gas of the hydrogen and the natural gas.

The service time of the user terminal 400 includes a peak service time and a peak service time, the peak service time is when the hydrogen and the natural gas in the riser 120 are layered, the peak service time is morning, noon and evening, and the peak service time is the time other than the peak service time in one day.

It should be noted that the peak usage period is not necessarily morning, noon and evening, and the peak usage period refer to the usage frequency of the plurality of user terminals 400 in a certain time, the usage frequency of the peak usage period is high, the usage frequency of the peak usage period is low, and the usage frequency of the peak usage period is high, and the gas supply pipe 110 needs to continuously supply gas due to the high usage frequency of the peak usage period, so that the natural gas and the hydrogen gas in the vertical pipe 120 are not easily layered, while the usage frequency of the peak usage period is low, the gas supply pipe 110 supplies gas very little, and the natural gas and the hydrogen gas in the vertical pipe 120 are easily layered.

Wherein the circulation assembly 200 has an operating state and a non-operating state, when the circulation assembly 200 is in the operating state, gas circulates between the riser pipe 120 and the return pipe 130, when the circulation assembly 200 is in the non-operating state, gas in the riser pipe 120 stagnates and hydrogen and natural gas tend to stratify, and a time period during which the circulation assembly 200 is in the non-operating state is shorter than a time period required for complete stratification of the hydrogen and natural gas.

In order to facilitate the automatic switching of the circulation assembly 200 between the operating state and the non-operating state, the structure further comprises a control assembly 300, and the control assembly 300 is used for driving the circulation assembly 200 to switch between the operating state and the non-operating state.

Specifically, the control assembly 300 includes an air flow sensor 310 and an information processor 320, the air flow sensor 310 is electrically connected to the information processor 320, the information processor 320 is electrically connected to the circulation assembly 200, a detection end of the air flow sensor 310 is disposed in the air supply pipe 110, the air flow sensor 310 is located on a side of the check valve 112 away from the connection port, the air flow sensor 310 is configured to detect whether a mixed air source of hydrogen and natural gas enters one end of the air supply pipe 110, when the mixed air source enters, the information processor 320 controls the circulation assembly 200 to be always in the non-working state, and when no mixed air source enters, the information processor 320 controls the circulation assembly 200 to be switched between the working state and the non-working state.

Preferably, the air pipe 110 is installed with a differential pressure generator-type pressure regulator 111, the differential pressure generator-type pressure regulator 111 is disposed between the air flow sensor 310 and the check valve 112, the control assembly 300 further includes a battery 330, the battery 330 is electrically connected to the differential pressure generator-type pressure regulator 111, and the battery 330 is electrically connected to the information processor 320, so that the electric energy generated by the differential pressure generator-type pressure regulator 111 is stored in the battery 330 and supplied to the information processor 320 for operation.

The working process is as follows: whether a mixed gas source enters the gas supply pipe 110 or not is detected by the gas flow sensor 310, if the mixed gas source enters, it is indicated that the user terminal 400 is in a peak use period, if no mixed gas source enters for a long time, it is indicated that the user terminal 400 is in a low peak use period, when the user terminal 400 is in the peak use period, the circulation assembly 200 is always in a non-working state, the mixed gas source continuously supplies gas to a plurality of user terminals 400 through the gas supply pipe 110 and the vertical pipe 120 in sequence, and when the user terminal 400 is in the peak use period, the information processor 320 controls the circulation assembly 200 to work intermittently, namely, the circulation assembly is switched between the working state and the non-working state in a reciprocating mode, so that natural gas and hydrogen in the vertical pipe 120 are in a state that layering cannot be achieved all the time.

Compared with the prior art: when layering occurs to the hydrogen and the natural gas in the vertical pipe 120, the circulation assembly 200 works intermittently, so that the gas between the vertical pipe 120 and the return pipe 130 flows in a circulating manner, the hydrogen and the natural gas are fully mixed, layering of the natural gas and the hydrogen in the vertical pipe 120 can be effectively prevented, and safety accidents are avoided.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention.