Adjusting and testing device for hydrogen-doped natural gas pipeline

Abstract

The invention is applicable to the field of gas testing, and provides a hydrogen-doped natural gas pipeline adjusting and testing device which comprises a gas mixing kettle, and a sealing mechanism is arranged between the gas mixing kettle and an end cover; a natural gas inlet is formed in the end cover at the front end, a weather heat injection device is arranged at the inner end of the natural gas inlet, a mixed gas outlet is formed in the end cover at the rear end, and a gas flow testing mechanism is arranged in the mixed gas outlet. When the gas mixing kettle is used, natural gas is input into the gas mixing kettle from the natural gas inlet, then hydrogen is injected from the hydrogen inlet in the upper portion into the gas mixing kettle and from the natural gas silencing nozzle through high pressure, the temperature of the natural gas can be increased while the natural gas bears the high pressure, and the hydrogen is injected downwards from the hydrogen silencing nozzle; the jet flow directions of natural gas and hydrogen are perpendicular to each other, then the natural gas and the hydrogen are subjected to primary fusion after colliding, and when mixed gas enters the middle position of the gas mixing kettle, the two gas mixing rotating wheels rotate in the opposite directions for secondary full mixing.

Description

Technical Field

[0001] The invention belongs to the field of gas testing, and in particular relates to a hydrogen-blended natural gas pipeline regulating testing device. Background Art

[0002] With the development of industrial technology, modern gas testing technology has become more and more perfect. The gas mixing equipment is the core component of the gas hydrogen mixing device. Its main task is to evenly mix natural gas and hydrogen in a predetermined ratio to form hydrogen-blended natural gas. This mixed gas not only has a higher calorific value, but also can achieve cleaner combustion, so it is widely used in various gas equipment; A hydrogen-blended natural gas pipeline testing device as disclosed in patent No. 202411045951.0 belongs to the technical field of natural gas pipeline testing, and aims at the problems of poor pipeline positioning effect and low testing efficiency. It includes a base and multiple universal wheels, and the multiple universal wheels are symmetrically distributed and fixed to the side wall of the bottom end of the base. A bearing cylinder is arranged directly above the base, and the side wall of the bottom end of the bearing cylinder is fixed with multiple support rods distributed in a circle, one end of the support rod is in contact with one side of the base, and a positioning component is arranged inside the bearing cylinder; the present invention effectively plays a role in clamping and positioning the natural gas pipeline through the arrangement of the positioning component, which not only has a good clamping and positioning effect on the natural gas pipeline, but also can be applied to the clamping and positioning work of natural gas pipelines of different sizes and specifications, has strong adaptability, is convenient for the staff to clamp and position the pipeline, and is conducive to improving the work efficiency of quality inspection and observation of the natural gas pipeline; The device still has defects when in use. First, the device does not stir the mixture thoroughly enough, resulting in uneven mixing of the two gases. Second, in order to better mix the gases together, the device preheats the mixed gas, but the heated natural gas and hydrogen will expand. The volume change of the natural gas and hydrogen mixed gas will affect the subsequent flow detection and density detection. Summary of the invention

[0003] The purpose of the present invention is to provide a hydrogen-blended natural gas pipeline adjustment and testing device in view of the deficiencies in the prior art. When the device is in use, the natural gas to be processed is input into the mixing kettle from the natural gas inlet, and then the hydrogen is input into the mixing kettle from the upper hydrogen inlet. The natural gas is ejected out from the natural gas muffler nozzle under high pressure. The temperature of the natural gas will be increased while being subjected to high pressure. Therefore, the molecules of the natural gas molecules will be more active after being taken into the mixing kettle. The hydrogen is ejected downward from the hydrogen muffler nozzle. The jet directions of the natural gas and the hydrogen are perpendicular to each other. Then, the natural gas and the hydrogen collide and fuse for the first time. When the mixed gas enters the middle position of the mixing kettle, the two mixing wheels at this time rotate in opposite directions for secondary full mixing, thereby achieving the effect of efficient mixing, thereby solving the problems mentioned in the background technology.

[0004] To solve the above problems, the present invention provides the following technical solutions: a hydrogen-blended natural gas pipeline adjustment and testing device, comprising a gas mixing kettle, a fixing device is provided at the bottom of the gas mixing kettle, end covers are provided at both ends of the gas mixing kettle, and a sealing mechanism is provided between the gas mixing kettle and the end covers; a natural gas inlet is provided on the end cover at the front end, a weather heat injection device is provided at the inner end of the natural gas inlet, a gas mixing outlet is provided on the end cover at the rear end, an airflow testing mechanism is provided inside the gas mixing outlet, a hydrogen inlet and a pressure gas release port are provided at the top of the gas mixing kettle, and a hydrogen injection device is provided at the inner end of the hydrogen inlet; a gas mixing component is provided on the front side of the gas mixing kettle, and a gas mixing cooling mechanism is provided on the rear side of the gas mixing kettle.

[0005] Furthermore, the fixing device includes two bases, which are fixedly connected to the concrete floor via expansion screws, and a layer of rubber pad is laid in the arc groove at the top of the base.

[0006] Furthermore, the sealing mechanism includes an annular groove on the edge of the end cover port, and the front and rear port edges of the mixing kettle are provided with arc strips inserted in the annular groove. The mixing kettle is fixedly connected to the outer side wall of the end cover through a bolt assembly block in an annular array.

[0007] Furthermore, the weather heat injection device includes a natural gas pressurizing box at the inner end of the natural gas inlet, three natural gas silencing nozzles are arranged on the side wall of the natural gas pressurizing box facing away from the natural gas inlet, and an air blocking tongue is arranged at the air outlet of the natural gas silencing nozzle.

[0008] Furthermore, the hydrogen injection device comprises a hydrogen pressurizing box at the inner end of the hydrogen inlet, and two hydrogen silencing nozzles are arranged at the bottom end of the hydrogen pressurizing box, and the injection directions of the natural gas silencing nozzle and the hydrogen silencing nozzle are perpendicular to each other.

[0009] Furthermore, the airflow testing mechanism comprises a cylindrical blocking block inside the mixed gas outlet, on which a plurality of needle-eye airways in a circular array are arranged, and in each of the needle-eye airways there are provided a gas detector.

[0010] Furthermore, the gas mixing component includes two vertical shafts rotatably arranged on the inner side wall of the gas mixing kettle, and a gas mixing wheel is arranged on the vertical shaft, and the rotation directions of the two gas mixing wheels are opposite.

[0011] Furthermore, the mixed gas cooling mechanism includes a support frame on the side wall of the mixed gas kettle, a spiral fan is arranged on one side of the support frame, a horizontal axis is arranged on the axis of the fan blades of the spiral fan, a vertical bevel gear is arranged at the end of the horizontal axis, horizontal bevel gears are arranged on the upper and lower sides of the vertical bevel gear, the two horizontal bevel gears are respectively meshed with the vertical bevel gears, the two horizontal bevel gears are respectively fixed to the ends of the two vertical axes, an extension pipe is arranged on the outside of the spiral fan, a cooling coil is fixedly arranged at the two ends of the extension pipe, the cooling coil passes through the side wall of the mixed gas kettle and extends to the top of the mixed gas kettle, a liquid nitrogen connector is arranged at the port of the cooling coil, and the liquid nitrogen connector is connected to the circulating liquid nitrogen.

[0012] Compared with the prior art, the embodiments of the present application have the following beneficial effects: Firstly, when the device is in use, the natural gas to be processed is input into the mixing kettle from the natural gas inlet, and then hydrogen is input into the mixing kettle from the upper hydrogen inlet. The natural gas is ejected out from the natural gas silencer nozzle under high pressure. The temperature of the natural gas will be increased while being subjected to high pressure. Therefore, the molecules of the natural gas will be more active after being taken into the mixing kettle. Hydrogen is ejected downward from the hydrogen silencer nozzle. The jet directions of the natural gas and hydrogen are perpendicular to each other. Then, the natural gas and hydrogen collide and fuse for the first time. When the mixed gas enters the middle position of the mixing kettle, the two mixing impellers rotate in opposite directions for secondary mixing, thereby achieving an efficient mixing effect.

[0013] Secondly, during the rotation process, the fan agitates the mixed gas to rotate in the gas mixing kettle to form a vortex, and then the rotating turbine at this time will pass through the cooling coil, and the two liquid nitrogen connectors will be connected to the circulating liquid nitrogen pump. After the liquid nitrogen is passed into the cooling coil, an extremely low temperature will be formed, and the vortex mixed gas will quickly transfer the heat to the liquid nitrogen and take it out, and then it will reach normal temperature when it is discharged from the mixed gas outlet. The density of the mixed gas at normal temperature will stabilize. During the operation of the spiral fan, the horizontal axis of the spiral fan axis will rotate synchronously, and the vertical bevel gear at the end of the horizontal axis will simultaneously drive the two vertical shafts to rotate through two horizontal bevel gears, and then the two mixed gas impellers will rotate in opposite directions with the vertical axis.

[0014] Thirdly, the cooled mixed gas passes through the pinhole airway on the sealing block. The sealing block can not only prevent the air from leaking out from the mixed gas outlet instantly, but also the gas detector in the pinhole airway can detect the proportion of natural gas components inside each pinhole airway. The deviation of the proportion of natural gas components inside each pinhole airway can be used as a reference for air uniformity. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the front view of the present invention.

[0016] Figure 2It is a schematic diagram of a cross-section of the present invention.

[0017] Figure 3 Schematic diagram of the natural gas inlet of the present invention.

[0018] Figure 4 Schematic diagram of the hydrogen inlet of the present invention.

[0019] Figure 5 Schematic diagram of the cooling coil of the present invention.

[0020] Figure 6 Schematic diagram of the spiral fan of the present invention.

[0021] Figure 7 Schematic diagram of the extension tube of the present invention.

[0022] Description of reference numerals: Gas mixing kettle 1, base 101, end cover 102, bolt assembly block 103, natural gas inlet 2, natural gas pressurizing box 201, natural gas silencer nozzle 202, gas mixing outlet 3, hydrogen inlet 4, hydrogen pressurizing box 401, hydrogen silencer nozzle 402, pressure diffuser 5, cooling coil 6, extension pipe 601, liquid nitrogen joint 602, support frame 7, spiral fan 701, horizontal shaft 8, vertical bevel gear 801, gas mixing impeller 802. DETAILED DESCRIPTION

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by technicians in the technical field of this application; the terms used in the specification of the application herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, not to describe a specific order.

[0024] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0025] The present invention provides a hydrogen-blended natural gas pipeline regulation test device, such as Figure 1-7As shown, it includes a gas mixing kettle 1, a fixing device is provided at the bottom of the gas mixing kettle 1, end covers 102 are provided at both ends of the gas mixing kettle 1, and a sealing mechanism is provided between the gas mixing kettle 1 and the end covers 102; a natural gas inlet 2 is provided on the front end of the end cover 102, and a weather heat injection device is provided at the inner end of the natural gas inlet 2; a gas mixing outlet 3 is provided on the rear end of the end cover 102, and an air flow testing mechanism is provided inside the gas mixing outlet 3; a hydrogen inlet 4 and a pressure gas dispersion port 5 are provided at the top of the gas mixing kettle 1, and a hydrogen injection device is provided at the inner end of the hydrogen inlet 4; a gas mixing component is provided on the front side of the gas mixing kettle 1, and a gas mixing cooling mechanism is provided on the rear side of the gas mixing kettle 1.

[0026] In this embodiment, the natural gas to be processed is input into the gas mixing kettle 1 from the natural gas inlet 2, and then hydrogen is input into the gas mixing kettle 1 from the upper hydrogen inlet 4. The temperature of the natural gas will be increased while being subjected to high pressure, so the molecules of the natural gas molecules will be more active after being taken into the gas mixing kettle 1. The input jet directions of the natural gas and the hydrogen are perpendicular to each other, and then the natural gas and the hydrogen are initially fused after collision. Compared with the natural gas preheating method in the prior art, the natural gas was previously heated by a water bath, but the water bath heating would mix steam water molecules into the natural gas, which would affect the subsequent testing work. The present invention uses high pressure to directly heat the natural gas so that impurities will not be mixed in.

[0027] In a further embodiment of the present invention, Figure 1 As shown, the fixing device includes two bases 101 , and the bases 101 are fixedly connected to the concrete floor through expansion screws, and a layer of rubber pad is laid in the arc groove at the top of the base 101 .

[0028] In this embodiment, the gas mixing kettle 1 is fixed on the ground through two bases 101 , and the rubber pad can reduce the rigid collision to the gas mixing kettle 1 , thereby preventing the gas mixing kettle 1 from deforming.

[0029] In a further embodiment of the present invention, Figure 1-2 As shown, the sealing mechanism includes an annular groove on the edge of the end cover 102 port, and the front and rear port edges of the mixing kettle 1 are provided with arc strips inserted in the annular groove. The mixing kettle 1 is fixedly connected to the outer side wall of the end cover 102 through a bolt assembly block 103 in an annular array.

[0030] In this embodiment, when the gas mixing device inside the gas mixing kettle 1 is maintained, the bolt assembly block 103 is disassembled, and then the two end covers 102 can be separated from the front and rear ports of the gas mixing kettle 1, and the staff can perform maintenance work from the front and rear ports of the gas mixing kettle 1. Compared with the gas mixing kettle body in the prior art, the previous gas mixing kettle body is relatively dense and cannot be completely opened, which makes it impossible to quickly maintain the core parts when they are damaged.

[0031] In a further embodiment of the present invention, Figure 1-4 As shown, the weather heat injection device includes a natural gas pressurizing box 201 at the inner end of the natural gas inlet 2, and three natural gas silencing nozzles 202 are arranged on the side wall of the natural gas pressurizing box 201 facing away from the natural gas inlet 2, and the gas outlet of the natural gas silencing nozzle 202 is provided with an air blocking tongue.

[0032] In this embodiment, the gas blocking tongue can provide corresponding pressure resistance to the outlet of the natural gas silencer nozzle 202, so that when the external weather heat input pump injects hydrogen, high pressure can be formed inside the natural gas pressurization box 201. The high-pressure natural gas can raise the temperature. The internal energy of the natural gas comes from the natural gas pump. Therefore, the molecules of the natural gas will be more active after being taken into the gas mixing kettle 1.

[0033] In a further embodiment of the present invention, Figure 1-4 As shown, the hydrogen injection device includes a hydrogen pressurizing box 401 at the inner end of the hydrogen inlet 4, and two hydrogen silencing nozzles 402 are arranged at the bottom end of the hydrogen pressurizing box 401, and the injection directions of the natural gas silencing nozzle 202 and the hydrogen silencing nozzle 402 are perpendicular to each other.

[0034] In this embodiment, hydrogen is sprayed downward from the hydrogen muffler nozzle 402, and the jet directions of natural gas and hydrogen are perpendicular to each other, and then the natural gas and hydrogen are initially fused after the device.

[0035] In a further embodiment of the present invention, Figure 1-2 As shown, the airflow testing mechanism includes a cylindrical blocking block inside the mixed gas outlet 3, and a plurality of needle-eye airways in a circular array are arranged on the blocking block, and gas detectors are arranged in the needle-eye airways.

[0036] In this embodiment, the cooled mixed gas passes through the pinhole airway on the blocking block. The blocking block can not only block the air from instantly leaking out of the mixed gas outlet, but also the gas detector in the pinhole airway can detect the proportion of natural gas components inside each pinhole airway. The deviation of the proportion of natural gas components inside each pinhole airway can be used as a reference for air uniformity.

[0037] In a further embodiment of the present invention, Figure 5-6 As shown, the gas mixing component includes two vertical shafts rotatably arranged on the inner side wall of the gas mixing kettle 1, and a gas mixing wheel 802 is arranged on the vertical shaft. The rotation directions of the two gas mixing wheels 802 are opposite.

[0038] In this embodiment, when the mixed gas enters the middle position of the gas mixing kettle 1, the two gas mixing impellers 802 rotate in opposite directions to achieve secondary full mixing, thereby achieving an efficient mixing effect.

[0039] In a further embodiment of the present invention, Figure 5-7 As shown, the mixed gas cooling mechanism includes a support frame 7 on the side wall of the mixed gas kettle 1, a spiral fan 701 is arranged on one side of the support frame 7, a horizontal axis 8 is arranged on the fan blade axis of the spiral fan 701, a vertical bevel gear 801 is arranged at the end of the horizontal axis 8, and horizontal bevel gears are arranged on the upper and lower sides of the vertical bevel gear 801, and the two horizontal bevel gears are respectively meshed with the vertical bevel gear 801, and the two horizontal bevel gears are respectively fixed on the ends of the two vertical axes, and an extension tube 601 is arranged on the outer side of the spiral fan 701, and a cooling coil 6 is fixedly arranged at the two ends of the extension tube 601, and the cooling coil 6 passes through the side wall of the mixed gas kettle 1 and extends to the top of the mixed gas kettle 1, and a liquid nitrogen connector 602 is arranged at the port of the cooling coil 6, and the liquid nitrogen connector 602 is connected to the circulating liquid nitrogen.

[0040] In this embodiment, the fan agitates the mixed gas to rotate in the gas mixing kettle 1 to form a vortex during the rotation process, and then the rotating turbine at this time will pass through the cooling coil 6, and the two liquid nitrogen connectors 602 will be connected to the circulating liquid nitrogen pump. After the liquid nitrogen is introduced into the cooling coil 6, an extremely low temperature will be formed, and the vortex mixed gas will quickly transfer the heat to the liquid nitrogen and take it out, and then it will reach a normal temperature when it is discharged from the gas mixing outlet 3. The density of the mixed gas at normal temperature will stabilize. During the operation of the spiral fan 701, the horizontal axis 8 of the axis of the spiral fan 701 will rotate synchronously, and the vertical bevel gear 801 at the end of the horizontal axis 8 will simultaneously drive the two vertical axes to rotate through two horizontal bevel gears, and then the two gas mixing impellers 802 will rotate in opposite directions with the vertical axis, achieving a linkage effect.

[0041] It should be noted that, for the above-mentioned embodiments, for the sake of simplicity, they are all described as a series of action combinations, but those skilled in the art should know that the present invention is not limited by the described order of actions, because according to the present invention, some steps may be performed in other orders or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present invention.

[0042] In the several embodiments provided in the present application, it should be understood that the disclosed devices can be implemented in other ways. For example, the device embodiments described above are merely schematic, such as the division of the above-mentioned units. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or communication connection shown or discussed can be through some interfaces, and the indirect coupling or communication connection between devices or units can be in the form of telecommunication or other forms.

[0043] The units described above as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0044] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the scope of protection of the invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on these embodiments, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in this field can still combine, add, delete or make other adjustments to the features in the various embodiments of the present invention according to the circumstances without conflict, without making creative work, so as to obtain different other technical solutions that do not deviate from the concept of the present invention in essence, and these technical solutions also belong to the scope of protection of the present invention.

Claims

1. A hydrogen-blended natural gas pipeline regulation test device, characterized in that: It comprises a gas mixing kettle (1), wherein a fixing device is arranged at the bottom of the gas mixing kettle (1), end covers (102) are arranged at both ends of the gas mixing kettle (1), and a sealing mechanism is arranged between the gas mixing kettle (1) and the end covers (102); The end cover (102) at the front end is provided with a natural gas inlet (2), and the inner end of the natural gas inlet (2) is provided with a weather heat injection device; the end cover (102) at the rear end is provided with a mixed gas outlet (3), and the interior of the mixed gas outlet (3) is provided with an air flow testing mechanism; the top end of the mixed gas kettle (1) is provided with a hydrogen inlet (4) and a pressure gas release port (5), and the inner end of the hydrogen inlet (4) is provided with a hydrogen injection device; A gas mixing component is arranged on the front side of the gas mixing kettle (1), and a gas mixing cooling mechanism is arranged on the rear side of the gas mixing kettle (1).

2. A hydrogen-blended natural gas pipeline adjustment test device according to claim 1, characterized in that: The fixing device comprises two bases (101), wherein the bases (101) are fixedly connected to the concrete floor via expansion screws, and a layer of rubber pad is laid in the arc groove at the top of the base (101).

3. The hydrogen-blended natural gas pipeline adjustment test device according to claim 1, characterized in that: The sealing mechanism comprises an annular groove on the edge of the port of the end cover (102), and the front and rear port edges of the gas mixing kettle (1) are provided with arcuate strips inserted into the annular groove. The gas mixing kettle (1) is respectively fixedly connected to the outer side wall of the end cover (102) by means of an annular array of bolt assembly blocks (103).

4. The hydrogen-blended natural gas pipeline adjustment test device according to claim 1, characterized in that: The weather heat injection device comprises a natural gas pressurizing box (201) at the inner end of a natural gas inlet (2), three natural gas silencing nozzles (202) being arranged on the side wall of the natural gas pressurizing box (201) facing away from the natural gas inlet (2), and a gas blocking tongue being arranged at the gas outlet of the natural gas silencing nozzle (202).

5. The hydrogen-blended natural gas pipeline adjustment test device according to claim 1, characterized in that: The hydrogen injection device comprises a hydrogen pressurizing box (401) at the inner end of a hydrogen inlet (4), and two hydrogen silencing nozzles (402) are arranged at the bottom end of the hydrogen pressurizing box (401), and the injection directions of the natural gas silencing nozzle (202) and the hydrogen silencing nozzle (402) are perpendicular to each other.

6. The hydrogen-blended natural gas pipeline adjustment test device according to claim 1, characterized in that: The airflow testing mechanism comprises a cylindrical blocking block inside the mixed gas outlet (3), on which a plurality of needle-eye airways in a circular array are arranged, and each of the needle-eye airways is provided with a gas detector.

7. The hydrogen-blended natural gas pipeline adjustment test device according to claim 1, characterized in that: The gas mixing component comprises two vertical shafts rotatably arranged on the inner side wall of the gas mixing kettle (1), and gas mixing wheels (802) are arranged on the vertical shafts. The two gas mixing wheels (802) rotate in opposite directions.

8. The hydrogen-blended natural gas pipeline adjustment test device according to claim 1, characterized in that: The mixed gas cooling mechanism comprises a support frame (7) on the side wall of the mixed gas kettle (1); a spiral fan (701) is arranged on one side of the support frame (7); a horizontal axis (8) is arranged on the fan blade axis of the spiral fan (701); a vertical bevel gear (801) is arranged at the end of the horizontal axis (8); horizontal bevel gears are arranged on the upper and lower sides of the vertical bevel gear (801); the two horizontal bevel gears are respectively meshed with the vertical bevel gears (801); the two horizontal bevel gears are respectively fixed to the ends of the two vertical axes; an extension tube (601) is arranged on the outside of the spiral fan (701); a cooling coil (6) is fixedly arranged at the two ends of the extension tube (601); the cooling coil (6) passes through the side wall of the mixed gas kettle (1) and extends to the top of the mixed gas kettle (1); a liquid nitrogen connector (602) is arranged at the end of the cooling coil (6); the liquid nitrogen connector (602) is connected to circulating liquid nitrogen.

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