CN-116875353-B - Natural gas hydrogen mixing device

CN116875353BCN 116875353 BCN116875353 BCN 116875353BCN-116875353-B

Abstract

The invention discloses a natural gas and hydrogen mixing device, which relates to the field of gas mixing equipment and comprises a main pipeline, wherein the main pipeline comprises a conical pipe section and a straight pipe section, one end of the straight pipe section is in sealing connection with the smaller end of the conical pipe section, the larger end of the conical pipe section is a natural gas inlet, the other end of the straight pipe section is a natural gas outlet, a hydrogen injection pipe is fixedly arranged in the straight pipe section, the axial direction of the hydrogen injection pipe is perpendicular to the axial direction of the straight pipe section, one end of the hydrogen injection pipe, which extends out of the straight pipe section, is a hydrogen inlet, a hydrogen uniform distribution structure comprises a plurality of uniform gases, the inner cavity of each uniform gas is communicated with the hydrogen injection pipe through a connecting pipe, each uniform gas is annular, all the uniform gases are coaxially arranged with the straight pipe section, one end of the uniform gases, which is far away from the conical pipe section, is provided with a hydrogen outlet hole, the outlet ends of all the uniform gases are positioned on the same plane, and a space is reserved between any two adjacent uniform gases. The invention improves the mixing uniformity of the hydrogen and the natural gas.

Inventors

HAN MIN
ZHAO LIANKUAN
WANG YU

Assignees

欧科能源技术(天津)有限公司

Dates

Publication Date: 20260505
Application Date: 20221228

Claims (4)

1. The natural gas hydrogen mixing arrangement, its characterized in that includes: The main pipeline comprises a conical pipe section and a straight pipe section, one end of the straight pipe section is in sealing connection with the smaller end of the conical pipe section, the larger end of the conical pipe section is a natural gas inlet, and the other end of the straight pipe section is a natural gas outlet; The hydrogen injection pipe is fixedly arranged in the straight pipe section, the axial direction of the hydrogen injection pipe is perpendicular to the axial direction of the straight pipe section, one end of the hydrogen injection pipe extending out of the straight pipe section is a hydrogen inlet, and the other end of the hydrogen injection pipe is closed; the hydrogen gas uniform distribution structure comprises a plurality of uniform gases, wherein the inner cavity of each uniform gas is communicated with the hydrogen injection pipe through a connecting pipe, each uniform gas is annular, all the uniform gases are coaxially arranged with the straight pipe section, one end of each uniform gas, which is far away from the taper pipe section, is an air outlet end, a plurality of hydrogen gas outlet holes which are uniformly distributed in the circumferential direction are arranged on the air outlet end, all the air outlet ends of the uniform gases are positioned on the same plane, and an interval is reserved between any two adjacent uniform gases; The end, close to the cone pipe section, of the uniform gas is a flow guiding end, a conical surface and an inverted conical surface are arranged on the flow guiding end, the conical surface is far away from the center of the straight pipe section compared with the inverted conical surface, and the end, close to the cone pipe section, of the conical surface is connected with the end, close to the cone pipe section, of the inverted conical surface; the hydrogen uniform distribution structure further comprises a middle cone coaxial with the straight pipe section, one end of the middle cone, which is far away from the taper pipe section, is provided with a plurality of hydrogen outlet holes, and one end of the middle cone, which is far away from the taper pipe section, and the outlet ends are positioned on the same plane; a space is arranged between the uniform gas closest to the middle cone and the middle cone; the hydrogen gas uniform distribution device comprises a straight pipe section, a middle cone body, a gas outlet end, a gas inlet end, a gas outlet end, a gas flow plate and a gas flow guide plate, wherein the inner wall of the straight pipe section is also provided with an annular inverted conical surface coaxial with the straight pipe section, one end of the annular inverted conical surface, which is far away from the conical pipe section, is located on the same plane with the gas outlet end, a gap is reserved between the gas uniform distribution device closest to the annular inverted conical surface and the annular inverted conical surface, the gas uniform distribution device is different in pore diameter and number of the gas outlet holes on different gas uniform distribution devices, the gas uniform distribution device is smaller in pore diameter and smaller in number of the gas uniform distribution device closer to the center of the straight pipe section, the gas outlet holes on the middle cone body are smaller in pore diameter and smaller in number than the gas outlet holes on the gas uniform device, and the gas flow plate is in sealing connection with the inner wall of the straight pipe section.
2. A natural gas hydrogen mixing device according to claim 1, wherein each of the uniform gases has an equal length along the axial direction of the straight pipe section.
3. The natural gas hydrogen mixing device according to claim 1, wherein the inner cavity of each of the uniform gases is communicated with the hydrogen injection pipe through two connecting pipes.
4. A natural gas hydrogen mixing device according to claim 1, wherein the cone pipe section is coaxial with the straight pipe section.

Description

Natural gas hydrogen mixing device Technical Field The invention relates to the field of gas mixing equipment, in particular to a natural gas and hydrogen mixing device. Background Natural gas hydrogen loading is one of the main forms of hydrogen energy utilization, hydrogen produced by electrolysis of renewable energy sources or surplus hydrogen produced under the full-load operation condition of a hydrogenation station is injected into a natural gas pipe network to form hydrogen loaded natural gas, and then the hydrogen loaded natural gas is conveyed to an end user through the pipe network, so that a hydrogen energy industry chain of 'mixing-conveying-utilizing' is realized, and 'hydrogen energy-gas network' deep fusion is promoted. The natural gas hydrogen-adding technology not only can improve the utilization rate of renewable energy sources, but also can contribute to reducing pollutants generated by the terminal combustion of natural gas, solving the problem of atmospheric pollution and realizing carbon emission reduction. Because the property difference of hydrogen and methane is great, especially in the combustion performance, if the mixing uniformity of two gases is low, or layering phenomenon appears in the back-end pipeline, can cause the mixing gas Hua Bai number and burning potential disorder, two gases all belong to inflammable and explosive medium, easily lead to the safe in utilization of gas equipment, so the mixing uniformity of the core gas mixing component must reach more than 98%, each improvement needs to be through mixing simulation verification and pressure loss simulation verification, advanced blending technological process has very high requirements on the internal structure of the equipment mixer, and reasonable advanced structure and arrangement can guarantee the mixing uniformity of the gases. The existing mixing equipment for natural gas and hydrogen is often provided with a hydrogen inlet pipe at the center of a natural gas pipeline, and then hydrogen is mixed with the natural gas, so that the hydrogen is concentrated in the middle of the natural gas pipeline, and the mixing uniformity is poor. Disclosure of Invention The invention aims to provide a natural gas and hydrogen mixing device, which is used for solving the problems in the prior art and improving the mixing uniformity of hydrogen and natural gas. In order to achieve the above object, the present invention provides the following solutions: The invention provides a natural gas and hydrogen mixing device, which comprises: The main pipeline comprises a conical pipe section and a straight pipe section, one end of the straight pipe section is in sealing connection with the smaller end of the conical pipe section, the larger end of the conical pipe section is a natural gas inlet, and the other end of the straight pipe section is a natural gas outlet; The hydrogen injection pipe is fixedly arranged in the straight pipe section, the axial direction of the hydrogen injection pipe is perpendicular to the axial direction of the straight pipe section, one end of the hydrogen injection pipe extending out of the straight pipe section is a hydrogen inlet, and the other end of the hydrogen injection pipe is closed; The hydrogen equipartition structure, hydrogen equipartition structure includes a plurality of samming gas, every samming gas's inner chamber pass through the connecting pipe with hydrogen injection tube intercommunication, every samming gas all is annular, and whole samming gas with straight tube section coaxial setting, samming gas keeps away from the one end of cone pipe section is the end of giving vent to anger, be provided with a plurality of circumference evenly distributed's hydrogen ventholes on the end of giving vent to anger, all samming gas the end of giving vent to anger is located on the coplanar, arbitrary adjacent two have the interval between the samming gas. Preferably, one end of the uniform gas, which is close to the conical pipe section, is a flow guiding end, a conical surface and an inverted conical surface are arranged on the flow guiding end, the conical surface is far away from the center of the straight pipe section compared with the inverted conical surface, and one end of the conical surface, which is close to the conical pipe section, is connected with one end of the inverted conical surface, which is close to the conical pipe section. Preferably, the lengths of each of the uniform gases in the axial direction of the straight pipe sections are equal. Preferably, the apertures and the numbers of the hydrogen gas outlets on different uniform gases are different, and the smaller the apertures and the smaller the numbers of the hydrogen gas outlets on the uniform gases are, which are closer to the center of the straight pipe section. Preferably, the hydrogen uniform distribution structure further comprises a middle cone coaxial with the straight pipe section, a plurality of hydrogen outlet holes