Natural gas hydrogen mixing device for gas turbines

Abstract

The present invention belongs to the field of gas turbine power generation technology, and in particular relates to a natural gas hydrogen mixing device for gas turbines, comprising a regulating tank, a hydrogen channel, a gas channel, and a mixed gas channel. The hydrogen channel and the gas channel are each provided with a first one-way vent assembly and a second one-way vent assembly. One end of the first one-way vent assembly is provided with a first movable plate, and one end of the second one-way vent assembly is provided with a second movable plate. A contact switch is provided on one side of the second movable plate. A storage tank connected thereto is provided at the top of the hydrogen channel. Hydrogen and fuel gas enter the regulating tank through the hydrogen channel and the gas channel, respectively, and are mixed. The first one-way vent assembly not only ensures the priority use of hydrogen, but also prevents the fuel gas from flowing back when there is no hydrogen. At the same time, the interaction between the first movable plate and the second movable plate prevents excessive hydrogen. Excess hydrogen will be temporarily stored in the storage tank and automatically replenished when the hydrogen amount decreases.

Description

Technical Field

[0001] The present invention belongs to the technical field of gas turbine power generation, and in particular relates to a natural gas hydrogen mixing device for a gas turbine. Background Art

[0002] There is a problem with hydrogen-blended combustion in gas turbines. The hydrogen comes from hydrogen-containing tail gas from surrounding industrial users, and the amount of hydrogen is uncertain and fluctuates greatly. For gas turbine design, excessive and rapidly changing hydrogen content will affect the stability of gas turbine combustion, causing adverse factors such as deflagration and vibration, affecting the stability of the gas turbine shafting, and in severe cases, causing damage to the gas turbine.

[0003] Therefore, gas turbine manufacturers often require that the hydrogen content of natural gas cannot exceed a certain ratio. On the other hand, hydrogen cannot be stored in large quantities. The pipeline network requires that if there is hydrogen in the pipeline, it must be mixed and burned first and cannot be stored in large quantities. The existing natural gas hydrogen mixing equipment cannot effectively control the hydrogen mixing ratio, and when the amount of hydrogen is large, directly discharging it will also cause waste.

[0004] In order to solve the above problems, this application proposes a natural gas hydrogen mixing device for a gas turbine. Summary of the Invention

[0005] In order to solve the problems raised in the above background technology, the present invention provides a natural gas hydrogen mixing device for gas turbines, which has the characteristics of preferentially mixing with hydrogen for combustion and effectively controlling the mixing ratio of hydrogen.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a natural gas hydrogen blending device for a gas turbine, comprising a regulating tank, wherein a hydrogen channel and a gas channel are respectively provided on one side of the regulating tank, and a mixed gas channel is provided on the bottom of the other side of the regulating tank. A first one-way vent assembly and a second one-way vent assembly are respectively provided inside the hydrogen channel and the gas channel;

[0007] A first movable plate is provided at one end of the first one-way vent assembly, a second movable plate is provided at one end of the second one-way vent assembly, a contact switch is provided on a side of the second movable plate close to the second movable plate, and a storage tank connected to the hydrogen channel is provided at the top of the hydrogen channel;

[0008] A support seat is provided at the bottom of the regulating tank, and a first baffle and a second baffle are provided in sequence from left to right inside the regulating tank.

[0009] As a preferred natural gas hydrogen blending device for a gas turbine of the present invention, the first one-way ventilation assembly includes a first sealing plug arranged on the inner side of the middle part of the hydrogen channel, a first ventilation hole is opened in the middle part of the first sealing plug, a first telescopic rod is provided on one side of the first sealing plug, a first sealing ball abutting against the first sealing plug is provided at one end of the first telescopic rod, a first limit plate is provided in the middle part of the first telescopic rod, the first movable plate is provided at one end of the first telescopic rod, and a first tension spring is provided between the first movable plate and the inner wall of the regulating tank.

[0010] As a preferred natural gas hydrogen blending device for a gas turbine of the present invention, the second one-way ventilation assembly includes a second sealing plug arranged on the inner side of the middle part of the gas channel, a second ventilation hole is opened in the middle part of the second sealing plug, a second telescopic rod is provided on one side of the second sealing plug, a second sealing ball abutting the second sealing plug is provided at one end of the second telescopic rod, a second limit plate is provided in the middle part of the second telescopic rod, a second movable plate is provided at one end of the second telescopic rod, and a second tension spring is provided between the second movable plate and the inner wall of the regulating tank.

[0011] As a preferred embodiment of the natural gas hydrogen mixing device for a gas turbine of the present invention, the aperture of the first vent hole is smaller than the diameter of the first sealing ball, and the aperture of the second vent hole is smaller than the diameter of the second sealing ball.

[0012] As a preferred embodiment of the natural gas hydrogen blending device for a gas turbine of the present invention, through holes are provided on the outer circumferences of the first limiting plate and the second limiting plate.

[0013] As a preferred natural gas hydrogen blending device for a gas turbine of the present invention, the storage tank is connected to the hydrogen channel through an inlet pipe and an outlet pipe, respectively, and the inlet pipe and the outlet pipe are respectively located on both sides of the first sealing plug, an air pump electrically connected to the contact switch is provided in the middle of the inlet pipe, and a sealing assembly is provided at the bottom of the outlet pipe.

[0014] As a preferred embodiment of the natural gas hydrogen mixing device for a gas turbine of the present invention, an air storage bag connected to the air inlet pipe and the air outlet pipe is provided inside the storage tank, and a compression spring is provided between the top end of the air storage bag and the inner wall of the storage tank.

[0015] As a preferred embodiment of the natural gas hydrogen blending device for a gas turbine of the present invention, the sealing assembly includes a limit sleeve, a sealing rod is vertically provided in the middle of the limit sleeve, and a wedge block is provided on the top of the first telescopic rod to abut against the bottom of the sealing rod.

[0016] As a preferred embodiment of the natural gas hydrogen blending device for a gas turbine of the present invention, avoidance grooves are provided between the first baffle and the inner bottom end of the regulating tank and between the second baffle and the inner top end of the regulating tank.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: hydrogen and fuel gas enter the regulating tank through the hydrogen channel and the fuel gas channel respectively and are mixed, wherein the first one-way ventilation component can not only ensure the priority use of hydrogen, but also prevent the fuel gas from flowing back when there is no hydrogen, and at the same time, the mutual cooperation between the first movable plate and the second movable plate can prevent excessive hydrogen, and the excess hydrogen will be temporarily stored in the storage tank and automatically replenished when the hydrogen amount decreases. The present invention solves the problems of a large proportion of hydrogen mixing and waste of direct hydrogen discharge. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0019] Figure 1 is an axonometric drawing of the present invention;

[0020] Figure 2 is a cross-sectional view of the present invention;

[0021] Figure 3 Schematic diagram of the structure of the one-way ventilation component of the present invention;

[0022] Figure 4 for Figure 2 A partial enlarged view of point A in the middle;

[0023] Figure 5 Schematic diagram of the structure of the air storage bag in the present invention;

[0024] Figure 6 for Figure 2 A partial enlarged view of point B in the middle.

[0025] In the figure: 1, regulating tank; 2, hydrogen channel; 3, gas channel; 4, mixed gas channel; 5, first one-way vent assembly; 501, first sealing plug; 502, first vent hole; 503, first telescopic rod; 504, first sealing ball; 505, first limit plate; 506, first tension spring; 6, second one-way vent assembly; 601, second sealing plug; 602, second vent hole; 603, second telescopic rod; 604, second sealing Ball; 605, second limit plate; 606, second tension spring; 7, first movable plate; 8, second movable plate; 9, contact switch; 10, storage tank; 11, support seat; 12, first baffle; 13, second baffle; 14, through hole; 15, air inlet pipe; 16, air outlet pipe; 17, vacuum pump; 18, sealing assembly; 1801, limit sleeve; 1802, sealing rod; 1803, wedge block; 19, air storage bag; 20, compression spring. DETAILED DESCRIPTION

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0027] Example 1

[0028] like Figure 1 and Figure 2 As shown;

[0029] A natural gas hydrogen mixing device for a gas turbine includes a regulating tank 1. A hydrogen channel 2 and a gas channel 3 are respectively provided on the upper and lower sides of one side of the regulating tank 1. A mixed gas channel 4 is provided at the bottom of the other side of the regulating tank 1. A first one-way ventilation component 5 and a second one-way ventilation component 6 are respectively provided inside the hydrogen channel 2 and the gas channel 3; a first movable plate 7 is provided at one end of the first one-way ventilation component 5, a second movable plate 8 is provided at one end of the second one-way ventilation component 6, a contact switch 9 is provided on the side of the second movable plate 8 close to the second movable plate 8, and a storage tank 10 connected to the hydrogen channel 2 is provided on the top; a support seat 11 is provided at the bottom of the regulating tank 1, and a first baffle 12 and a second baffle 13 are provided inside the regulating tank 1 from left to right.

[0030] It should be noted that: in this embodiment, a safety valve is provided at the bottom of the storage tank 10, and when the hydrogen pressure in the storage tank 10 exceeds the safety value, the safety valve is used to actively discharge the hydrogen; the ends of the hydrogen channel 2, the fuel gas channel 3 and the mixed gas channel 4 are all provided with flanges, which facilitates detachable connection with external equipment or pipelines.

[0031] In this embodiment: hydrogen and fuel gas enter the regulating tank 1 through the hydrogen channel 2 and the fuel gas channel 3 respectively and are mixed, wherein the first one-way ventilation component 5 can not only ensure the priority use of hydrogen, but also prevent the fuel gas from flowing back when there is no hydrogen. At the same time, the mutual cooperation between the first movable plate 7 and the second movable plate 8 can prevent excessive hydrogen, and the excess hydrogen will be temporarily stored in the storage tank 10 and automatically replenished when the hydrogen amount decreases. This embodiment solves the problems of a large proportion of hydrogen mixing and waste of direct hydrogen discharge.

[0032] like Figure 3 and Figure 4 As shown;

[0033] In an optional embodiment, the first one-way vent assembly 5 includes a first sealing plug 501 disposed inside the central portion of the hydrogen channel 2. A first vent hole 502 is defined in the central portion of the first sealing plug 501. A first telescopic rod 503 is disposed on one side of the first sealing plug 501. A first sealing ball 504 is disposed at one end of the first telescopic rod 503, which abuts the first sealing plug 501. A first limiting plate 505 is disposed in the central portion of each of the first telescopic rods 503. A first movable plate 7 is disposed at one end of the first telescopic rod 503. A first tension spring 506 is disposed between the first movable plate 7 and the inner wall of the regulating tank 1.

[0034] In an optional embodiment, the second one-way ventilation assembly 6 includes a second sealing plug 601 arranged on the inner side of the middle part of the gas channel 3, a second ventilation hole 602 is opened in the middle of the second sealing plug 601, a second telescopic rod 603 is provided on one side of the second sealing plug 601, and a second sealing ball 604 abutting against the second sealing plug 601 is provided at one end of the second telescopic rod 603, a second limiting plate 605 is provided in the middle part of the second telescopic rod 603, a second movable plate 8 is provided at one end of the second telescopic rod 603, a second tension spring 606 is provided between the second movable plate 8 and the inner wall of the regulating tank 1, the aperture of the first ventilation hole 502 is smaller than the diameter of the first sealing ball 504, and the aperture of the second ventilation hole 602 is smaller than the diameter of the second sealing ball 604, and a through hole 14 is opened on the outer side of the circumference of the first limiting plate 505 and the second limiting plate 605.

[0035] In this embodiment, hydrogen pushes the first sealing ball 504 away from the first sealing plug 501, and the first telescopic rod 503 is extended and retracted. At this time, the first tension spring 506 is stretched, and hydrogen enters the regulating tank 1 along the first vent hole 502 and the through hole 14. The fuel gas enters in the same way.

[0036] It should be noted that the cross-sections of the first telescopic rod 503 and the second telescopic rod 603 are both rectangular structures, and the middle portions of the first limiting plate 505 and the second limiting plate 605 are both provided with rectangular notches.

[0037] like Figure 5 and Figure 6 As shown;

[0038] In an optional embodiment, the storage tank 10 is connected to the hydrogen channel 2 through the air inlet pipe 15 and the air outlet pipe 16, respectively, and the air inlet pipe 15 and the air outlet pipe 16 are respectively located on both sides of the first sealing plug 501, and an air pump 17 electrically connected to the contact switch 9 is provided in the middle of the air inlet pipe 15, and a sealing assembly 18 is provided at the bottom of the air outlet pipe 16. The interior of the storage tank 10 is provided with an air storage bag 19 connected to the air inlet pipe 15 and the air outlet pipe 16, and a compression spring 20 is provided between the top of the air storage bag 19 and the inner wall of the storage tank 10. The sealing assembly 18 includes a limit sleeve 1801, and a sealing rod 1802 is vertically provided in the middle of the limit sleeve 1801. The top of the first telescopic rod 503 is provided with a wedge block 1803 that abuts the bottom of the sealing rod 1802.

[0039] In this embodiment: the vacuum pump 17 has a sealing function, which can prevent gas backflow when it is not working. The air storage bag 19 is a retractable structure, and the compression spring 20 can completely compress the air storage bag 19. When the amount of hydrogen decreases, the first tension spring 506 drives the first telescopic rod 503 to reset. At the same time, the wedge block 1803 squeezes the sealing rod 1802 and drives it to rise. The sealing rod 1802 leaves the top of the limiting sleeve 1801, and the compression spring 20 squeezes the air storage bag 19 and discharges the hydrogen therein into the hydrogen channel 2 through the hole on the limiting sleeve 1801.

[0040] It should be noted that the top of the limit sleeve 1801 is an inverted cone structure, and the top of the sealing rod 1802 can seal the top of the limit sleeve 1801 under the action of gravity. The cross-section of the wedge block 1803 is a trapezoidal structure, and the height of the top of the wedge block 1803 gradually increases in the direction away from the first sealing ball 504.

[0041] In an optional embodiment, avoidance grooves are provided between the first baffle 12 and the inner bottom end of the regulating tank 1 and between the second baffle 13 and the inner top end of the regulating tank 1 .

[0042] In this embodiment, the mixed gas in the regulating tank 1 passes through the bottom of the first baffle 12 and the top of the second baffle 13 in sequence and is discharged to the gas turbine through the mixed gas channel 4.

[0043] The working principle and use process of the present invention are as follows: hydrogen and fuel gas enter the regulating tank 1 through the hydrogen channel 2 and the fuel gas channel 3 respectively and mix. The hydrogen pushes the first sealing ball 504 to leave the first sealing plug 501. At this time, the first tension spring 506 is stretched, and hydrogen enters the regulating tank 1 along the first vent 502 and the through hole 14. The fuel gas enters in the same way. The mixed gas in the regulating tank 1 passes through the bottom of the first baffle 12 and the top of the second baffle 13 and is discharged to the gas turbine through the mixed gas channel 4. When the amount of hydrogen is large, the hydrogen pushes the first movable plate 7 and squeezes the contact switch 9 on the second movable plate 8. At this time, the contact switch 9 controls the vacuum pump 17 to pump gas. The remaining hydrogen enters the air storage bag 19 through the air inlet pipe 15, the air storage bag 19 expands and squeezes the compression spring 20, and the sealing rod 1802 closes the limit sleeve 1801 under the action of gravity. When the amount of hydrogen decreases, the first tension spring 506 drives the first telescopic rod 503 to reset. At the same time, the wedge block 1803 squeezes the sealing rod 1802 and drives it to rise. The sealing rod 1802 leaves the top of the limit sleeve 1801, and the compression spring 20 squeezes the air storage bag 19 and discharges the hydrogen therein into the hydrogen channel 2 through the hole on the limit sleeve 1801. A safety valve can be set at the bottom of the storage tank 10. When the hydrogen pressure in the air storage bag 19 exceeds the safety value, the safety valve is used to actively discharge it.

[0044] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or substitute equivalents for some of the technical features. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A natural gas hydrogen mixing device for a gas turbine, comprising a regulating tank (1), characterized in that: A hydrogen channel (2) and a gas channel (3) are respectively provided on the upper and lower sides of one side of the regulating tank (1); a mixed gas channel (4) is provided on the bottom of the other side of the regulating tank (1); a first one-way vent assembly (5) and a second one-way vent assembly (6) are respectively provided inside the hydrogen channel (2) and the gas channel (3); A first movable plate (7) is provided at one end of the first one-way vent assembly (5), a second movable plate (8) is provided at one end of the second one-way vent assembly (6), a contact switch (9) is provided on a side of the second movable plate (8) close to the second movable plate (8), and a storage tank (10) is provided at the top of the hydrogen channel (2) and is in communication with the hydrogen channel (2); A support seat (11) is provided at the bottom of the regulating tank (1), and a first baffle (12) and a second baffle (13) are provided in sequence from left to right inside the regulating tank (1); The first one-way ventilation assembly (5) includes a first sealing plug (501) provided on the inner side of the middle of the hydrogen channel (2), a first ventilation hole (502) is provided in the middle of the first sealing plug (501), a first telescopic rod (503) is provided on one side of the first sealing plug (501), one end of the first telescopic rod (503) is provided with a first sealing ball (504) abutting against the first sealing plug (501), a first limiting plate (505) is provided in the middle of the first telescopic rod (503), one end of the first telescopic rod (503) is provided with the first movable plate (7), and a first tension spring (506) is provided between the first movable plate (7) and the inner wall of the regulating tank (1); The second one-way ventilation assembly (6) comprises a second sealing plug (601) provided on the inner side of the middle of the gas channel (3), a second ventilation hole (602) is provided in the middle of the second sealing plug (601), a second telescopic rod (603) is provided on one side of the second sealing plug (601), one end of the second telescopic rod (603) is provided with a second sealing ball (604) abutting against the second sealing plug (601), a second limiting plate (605) is provided in the middle of the second telescopic rod (603), one end of the second telescopic rod (603) is provided with a second movable plate (8), and a second tension spring (606) is provided between the second movable plate (8) and the inner wall of the regulating tank (1); The storage tank (10) is connected to the hydrogen channel (2) through an air inlet pipe (15) and an air outlet pipe (16), and the air inlet pipe (15) and the air outlet pipe (16) are respectively located on both sides of the first sealing plug (501). An air pump (17) electrically connected to the contact switch (9) is provided in the middle of the air inlet pipe (15), and a sealing component (18) is provided at the bottom of the air outlet pipe (16).

2. The natural gas hydrogen mixing device for a gas turbine according to claim 1, characterized in that: The aperture of the first ventilation hole (502) is smaller than the diameter of the first sealing ball (504), and the aperture of the second ventilation hole (602) is smaller than the diameter of the second sealing ball (604).

3. The natural gas hydrogen mixing device for a gas turbine according to claim 1, characterized in that: Through holes (14) are provided on the outer circumferences of the first limiting plate (505) and the second limiting plate (605).

4. The natural gas hydrogen mixing device for a gas turbine according to claim 1, characterized in that: An air storage bag (19) connected to the air inlet pipe (15) and the air outlet pipe (16) is provided inside the storage tank (10), and a compression spring (20) is provided between the top end of the air storage bag (19) and the inner wall of the storage tank (10).

5. The natural gas hydrogen mixing device for a gas turbine according to claim 1, characterized in that: The sealing assembly (18) comprises a limiting sleeve (1801), a sealing rod (1802) is vertically provided in the middle of the limiting sleeve (1801), and a wedge-shaped block (1803) is provided at the top of the first telescopic rod (503) to abut against the bottom of the sealing rod (1802).

6. The natural gas hydrogen mixing device for a gas turbine according to any one of claims 1 to 5, characterized in that: Avoidance grooves are provided between the first baffle (12) and the inner bottom end of the regulating tank (1), and between the second baffle (13) and the inner top end of the regulating tank (1).

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