Gas supply adjusting device based on pure ammonia fuel

Abstract

The utility model relates to the technical field of ammonia energy utilization, in particular to a gas supply adjusting device based on pure ammonia fuel. The gas supply adjusting device comprises a gas supply pipeline, an igniter gas supply unit and a main furnace fire head gas supply assembly, the main furnace fire head gas supply assembly comprises a first-stage gas supply unit, a second-stage gas supply unit to an n-stage gas supply unit which are connected in parallel, and the gas supply flow is sequentially reduced from the first-stage gas supply unit to the n-stage gas supply unit. Due to the fact that the main furnace fire head gas supply assembly comprises the multiple stages of gas supply units which are connected in parallel, and the gas supply flow is sequentially reduced, when the combustion flow needs to be increased and the heating capacity needs to be improved, the low-stage gas supply units can be started, and gear shifting type adjustment is achieved. And meanwhile, as the igniter gas supply unit is provided with the throttling orifice assembly to adjust the gas flow, small-flow adjustment of gas can be achieved, the flow entering the plasma ignition burner can be accurately controlled, and the success rate of ignition of the igniter in the plasma ignition burner is increased.

Description

Technical Field

[0001] The utility model relates to the technical field of ammonia energy utilization, in particular to a gas supply regulating device based on pure ammonia fuel. Background Art

[0002] Ammonia is a gas with a pungent odor, no color, and high corrosiveness at normal temperature and pressure. Moreover, the laminar burning speed and calorific value of ammonia are both low, the ignition energy required is high, the ignition temperature is high, and it needs 651 °C to be ignited. The explosion limit is narrow, between 16% and 25%. Therefore, the combustion characteristics of ammonia are poor and it is difficult to ignite. Using plasma ignition technology can achieve efficient ignition and continuous combustion of ammonia gas. However, due to the high ignition energy of ammonia gas and the slow flame propagation speed, when burning in a relatively closed burner, the flow rate of ignited and combusted ammonia gas should not be too large. Once the ignition fails, a large amount of ammonia gas is likely to leak, polluting the environment. In the prior art, a flow regulating valve is usually used to reduce the flow rate of the flowing gas in the pipeline. However, the current flow regulating valve cannot achieve small flow rate regulation of the gas within 10 Nm 3 / h, thus resulting in low reliability of flow regulation.

[0003] Therefore, there is an urgent need for a steam supply regulating device based on pure ammonia fuel to improve the ignition success rate of a plasma ignition burner. Summary of the Utility Model

[0004] (1) Technical Problems to be Solved

[0005] In view of the above-mentioned shortcomings and deficiencies of the prior art, the utility model provides a gas supply regulating device based on pure ammonia fuel, which solves the technical problem that the existing flow regulating valve has low regulation reliability for small gas flow rates, and thus the flow rate entering the plasma ignition burner cannot be accurately controlled, resulting in a low ignition success rate of the plasma ignition burner.

[0006] (2) Technical Solutions

[0007] To achieve the above object, the main technical solutions adopted by the utility model include:

[0008] An embodiment of the present utility model provides a gas supply regulating device based on pure ammonia fuel, which includes a gas supply pipeline, an igniter gas supply unit, and a main furnace burner gas supply assembly; the main furnace burner gas supply assembly includes a first-stage gas supply unit, a second-stage gas supply unit to an n-stage gas supply unit connected in parallel, where n is an integer greater than or equal to 2; the gas supply pipeline is respectively selectively connected to the inlet of the igniter gas supply unit and the inlet of each stage of gas supply unit to supply ammonia gas for them, the outlet of the igniter gas supply unit is used to communicate with the igniter of the plasma ignition burner, and the outlet of each stage of gas supply unit is used to communicate with the main furnace burner of the plasma ignition burner; the second-stage gas supply unit to the n-stage gas supply unit and the igniter gas supply unit both regulate the gas supply flow rate by setting an orifice plate assembly, and from the first-stage gas supply unit to the n-stage gas supply unit, the gas supply flow rate decreases in sequence.

[0009] Preferably, each stage of gas supply unit includes a first connecting pipeline and a first valve arranged on the first connecting pipeline, where the inlet of the first connecting pipeline is connected to the gas supply pipeline, and the outlet of the first connecting pipeline is connected to the main furnace burner; in the second-stage gas supply unit to the n-stage gas supply unit: the orifice plate assembly is connected in series with the first valve on the first connecting pipeline; from the second-stage gas supply unit to the n-stage gas supply unit, the gas supply flow rate in the orifice plate assembly decreases in sequence.

[0010] Preferably, in the second-stage gas supply unit to the n-stage gas supply unit and the igniter gas supply unit: the orifice plate assembly includes a plurality of throttle pipelines, throttle orifice plates are provided between adjacent two throttle pipelines and at the outer ends of the throttle pipelines on both sides; from the second-stage gas supply unit to the n-stage gas supply unit, the number of throttle pipelines decreases in sequence.

[0011] Preferably, the igniter gas supply unit includes a second connecting pipeline and a second valve arranged on the second connecting pipeline, where the inlet of the second connecting pipeline is connected to the gas supply pipeline, and the outlet of the second connecting pipeline is connected to the igniter; in the igniter gas supply unit: the orifice plate assembly is connected in series with the second valve on the second connecting pipeline.

[0012] Preferably, the igniter gas supply unit further includes a buffer tank and a suction fan; the buffer tank is arranged on the second connecting pipeline, the outlet of the orifice plate assembly in the igniter gas supply unit is connected to the first inlet of the buffer tank, the outlet of the suction fan is connected to the second inlet of the buffer tank, and the outlet of the buffer tank is connected to the igniter.

[0013] Preferably, the igniter gas supply unit further includes a third valve; the third valve is arranged between the suction fan and the buffer tank.

[0014] Preferably, the throttle pipeline and the throttle orifice plate are connected by welding.

[0015] Preferably, the diameter of the throttle orifice in the throttle orifice plate is 1-3 mm.

[0016] Preferably, n is 2 or 3.

[0017] (III) Beneficial effects

[0018] The beneficial effects of the present utility model are as follows:

[0019] A gas supply regulation device based on pure ammonia fuel of the present utility model includes a gas supply pipeline, an igniter gas supply unit, and a main furnace burner gas supply assembly. The main furnace burner gas supply assembly includes a first-stage gas supply unit, a second-stage gas supply unit to an n-stage gas supply unit connected in parallel. The gas supply pipeline is selectively connected to the inlet of the igniter gas supply unit and the inlet of each stage of gas supply unit to supply ammonia gas to them. The outlet of the igniter gas supply unit is used to communicate with the igniter of the plasma ignition burner, and the outlet of each stage of gas supply unit is used to communicate with the main furnace burner of the plasma ignition burner. The second-stage gas supply unit to the n-stage gas supply unit adjust the gas supply flow rate by setting a throttle orifice plate assembly. From the first-stage gas supply unit to the n-stage gas supply unit, the gas supply flow rate decreases in sequence. Since the main furnace burner gas supply assembly includes multiple stages of gas supply units connected in parallel and the gas supply flow rate decreases in sequence, when it is necessary to increase the combustion flow rate and improve the heating amount, the lower-stage gas supply unit can be opened to achieve "gear-shift" regulation.

[0020] At the same time, since the igniter gas supply unit adjusts the gas flow rate by setting a throttle orifice plate assembly, small-flow regulation of the gas can be achieved, so that the flow rate entering the plasma ignition burner can be accurately controlled, improving the ignition success rate of the igniter in the plasma ignition burner, and avoiding the problem of incomplete combustion and leakage caused by a large flow rate of ammonia gas entering, thereby avoiding environmental pollution. Description of the drawings

[0021] Figure 1 is a schematic diagram of the gas supply regulation device based on pure ammonia fuel of the present utility model;

[0022] Figure 2 is Figure 1 a schematic diagram of the structure of the throttle orifice plate assembly in

[0023]

Description of the reference numerals

[0024] 1: Gas supply pipeline; 2: Igniter gas supply unit; 21: Second connecting pipeline; 22: Second valve; 23: Buffer tank; 24: Exhaust fan; 25: Third valve; 3: Main furnace burner gas supply assembly; 31: First-stage gas supply unit; 32: Second-stage gas supply unit; 3n: n-stage gas supply unit; 3a: First connecting pipeline; 3b; First valve; 4: Plasma ignition burner; 41: Igniter; 42: Main furnace burner; G: Throttle orifice plate assembly; G1: Throttle pipeline; G2: Throttle orifice plate. Detailed implementation manners

[0025] To better explain the present utility model for easier understanding, the present utility model will be described in detail below in conjunction with the accompanying drawings and through specific embodiments.

[0026] As Figure 1 shown, this embodiment provides a gas supply regulating device based on pure ammonia fuel. The gas supply regulating device includes a gas supply pipeline 1, an igniter gas supply unit 2, and a main furnace burner gas supply assembly 3. The main furnace burner gas supply assembly 3 includes a first-stage gas supply unit 31, a second-stage gas supply unit 32 to an n-stage gas supply unit 3n connected in parallel, where n is an integer greater than or equal to 2. In this embodiment, n is preferably 2 or 3.

[0027] Since the main furnace burner gas supply assembly 3 includes multiple stages of gas supply units connected in parallel and the gas supply flow rate decreases sequentially, when it is necessary to increase the combustion flow rate and heating amount, the lower-stage gas supply units can be opened to achieve a "shift-type" adjustment of the ammonia gas flow rate entering the main furnace burner 42.

[0028] The gas supply pipeline 1 is respectively selectively connected to the inlet of the igniter gas supply unit 2 and each stage of gas supply unit to supply ammonia gas to them. That is, the ammonia gas in the gas supply pipeline 1 is divided into two paths. One path provides ignition combustion for the igniter 41 in the plasma ignition burner 4, and the other path provides fuel for the continuous combustion of the main furnace burner 42 in the plasma ignition burner 4. The outlet of the igniter gas supply unit 2 is used to communicate with the igniter 41 of the plasma ignition burner 4, and the outlet of each stage of gas supply unit is used to communicate with the main furnace burner 42 of the plasma ignition burner 4. The second-stage gas supply unit 32 to the n-stage gas supply unit 3n and the igniter gas supply unit 2 both adjust the gas supply flow rate by setting an orifice plate assembly G. Since the igniter gas supply unit 2 can adjust the gas flow rate by setting the orifice plate assembly G, the small-flow adjustment of the gas can be realized, so that the flow rate entering the plasma ignition burner 4 can be accurately controlled, and the success rate of ignition of the igniter 41 in the plasma ignition burner 4 is improved.

[0029] As Figure 1 shown, each stage of gas supply unit includes a first connection pipeline 3a and a first valve 3b. The first valve 3b is arranged on the first connection pipeline 3a. Among them, the inlet of the first connection pipeline 3a is connected to the gas supply pipeline 1, and the outlet of the first connection pipeline 3a is connected to the main furnace burner 42.

[0030] In the second-stage gas supply unit 32 to the n-stage gas supply unit 3n: the orifice plate assembly G and the first valve 3b are connected in series on the first connection pipeline 3a. From the second-stage gas supply unit 32 to the n-stage gas supply unit 3n, the gas supply flow rate in the orifice plate assembly G decreases sequentially.

[0031] As Figure 2As shown in the figure, in the secondary gas supply unit 32 to the nth gas supply unit 3n and the igniter gas supply unit 2: The orifice plate assembly G includes a plurality of throttle pipes G1. Throttle orifice plates G2 are provided between adjacent two throttle pipes G1 and at the outer ends of the throttle pipes G1 on both sides. From the secondary gas supply unit 32 to the nth gas supply unit 3n, the number of throttle pipes G1 decreases in sequence. Among them, the throttle pipe G1 and the throttle orifice plate G2 are connected by welding. The diameter of the throttle orifice in the throttle orifice plate G2 is 1 - 3 mm.

[0032] Preferably, the igniter gas supply unit 2 includes a second connecting pipe 21, a second valve 22, a third valve 25, a buffer tank 23, and a suction fan 24. The second valve 22 and the buffer tank 23 are both arranged on the second connecting pipe 21. Among them, the inlet of the second connecting pipe 21 is communicated with the gas supply pipe 1, the outlet of the second connecting pipe 21 is communicated with the igniter 41. The orifice plate assembly G in the igniter gas supply unit 2 and the second valve 22 are connected in series on the second connecting pipe 21. The outlet of the orifice plate assembly G in the igniter gas supply unit 2 is communicated with the first inlet of the buffer tank 23, the outlet of the suction fan 24 is communicated with the second inlet of the buffer tank 23, the outlet of the buffer tank 23 is communicated with the igniter 41, and the third valve 25 is arranged between the suction fan 24 and the buffer tank 23. By setting the buffer tank 23 and the suction fan 24, before starting the igniter 41, air is drawn in. Due to the good ionization effect of the igniter 41 on air, the air is ionized first to ensure that ammonia can be ignited in time, further improving the success rate and reliability of ignition.

[0033] Working process: During operation, first open the third valve 25 and the suction fan 24 to draw air into the buffer tank 23. Connect the igniter 41 in the plasma ignition burner 4, and the igniter 41 ionizes the air to form high-temperature ionized air. Close the third valve 25, open the second valve 22, and ammonia enters the buffer tank 23 through the orifice plate assembly G in the igniter gas supply unit 2, and then enters the igniter 41 to be mixed with the high-temperature ionized air and ignited. After the igniter 41 burns, open the first valve 3b in the nth gas supply unit 3n. Ammonia enters the main furnace burner 42 after the gas supply flow is adjusted by the orifice plate assembly G in the nth gas supply unit 3n. The igniter 41 ignites the ammonia in the main furnace burner 42. After the ammonia in the main furnace burner 42 burns stably, close the first valve 3b in the nth gas supply unit 3n and the power supply of the igniter 41. When it is necessary to increase the combustion heat, open the first valve 3b in the lower-level gas supply unit. After the combustion flame of the main furnace burner 42 is stable, open the first valve 3b in the lower-level gas supply unit to achieve the large-fire operation of the main furnace burner. At the same time, shift adjustment can be made according to the combustion conditions of the subsequent burners.

[0034] In this embodiment, by setting the throttle orifice plate assembly G, throttling and pressure reduction are carried out first, realizing the low-flow rapid start of the ignition intake air of the igniter 41 in the plasma ignition burner 4 and the combustion intake air of the main furnace burner. Furthermore, when the fuel of the plasma ignition burner 4 is ammonia, the gas supply regulating device can be used to achieve the rapid ignition and staged combustion of ammonia.

[0035] In the description of the present utility model, it should be understood that the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, the meaning of "a plurality" is two or more unless otherwise specifically defined.

[0036] In the present utility model, unless otherwise clearly defined and limited, the terms "installed", "connected", "connected to", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium; it may be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0037] In the present utility model, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "under" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0038] In the description of this specification, the descriptions of terms such as "one embodiment", "some embodiments", "embodiment", "example", "specific example" or "some examples" mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0039] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention.

Claims

1. A gas supply regulating device based on pure ammonia fuel, characterized in that, It includes a gas supply pipeline (1), an igniter gas supply unit (2), and a main furnace burner gas supply assembly (3); The main furnace burner gas supply assembly (3) includes a first-stage gas supply unit (31), a second-stage gas supply unit (32) to an n-stage gas supply unit (3n) connected in parallel, where n is an integer greater than or equal to 2; The gas supply pipeline (1) is respectively selectively connected to the inlet of the igniter gas supply unit (2) and the inlet of each stage of the gas supply unit to supply ammonia gas to them. The outlet of the igniter gas supply unit (2) is used to communicate with the igniter (41) of the plasma ignition burner (4), and the outlet of each stage of the gas supply unit is used to communicate with the main furnace burner (42) of the plasma ignition burner (4); For the second-stage gas supply unit (32) to the n-stage gas supply unit (3n) and the igniter gas supply unit (2), the gas supply flow rate is adjusted by setting a throttle orifice plate assembly (G). From the first-stage gas supply unit (31) to the n-stage gas supply unit (3n), the gas supply flow rate decreases in sequence.

2. The gas supply adjustment device based on pure ammonia fuel according to claim 1, characterized in that: Each stage of the gas supply unit includes a first connection pipeline (3a) and a first valve (3b) provided on the first connection pipeline (3a). Among them, the inlet of the first connection pipeline (3a) is connected to the gas supply pipeline (1), and the outlet of the first connection pipeline (3a) is connected to the main furnace burner (42); Among the second-stage gas supply unit (32) to the n-stage gas supply unit (3n): the throttle orifice plate assembly (G) is connected in series with the first valve (3b) on the first connection pipeline (3a); From the second-stage gas supply unit (32) to the n-stage gas supply unit (3n), the gas supply flow rate in the throttle orifice plate assembly (G) decreases in sequence.

3. The gas supply adjustment device based on pure ammonia fuel according to claim 2, characterized in that: Among the second-stage gas supply unit (32) to the n-stage gas supply unit (3n) and the igniter gas supply unit (2): the throttle orifice plate assembly (G) includes a plurality of throttle pipelines (G1), and throttle orifice plates (G2) are provided between adjacent two of the throttle pipelines (G1) and at the outer ends of the throttle pipelines (G1) on both sides; From the second-stage gas supply unit (32) to the n-stage gas supply unit (3n), the number of the throttle pipelines (G1) decreases in sequence.

4. The gas supply adjustment device based on pure ammonia fuel according to claim 3, characterized in that: The igniter gas supply unit (2) includes a second connection pipeline (21) and a second valve (22) provided on the second connection pipeline (21). Among them, the inlet of the second connection pipeline (21) is connected to the gas supply pipeline (1), and the outlet of the second connection pipeline (21) is connected to the igniter (41); In the igniter gas supply unit (2): the throttle orifice plate assembly (G) is connected in series with the second valve (22) on the second connection pipeline (21).

5. The air supply regulating device based on pure ammonia fuel according to claim 4, characterized in that: The igniter gas supply unit (2) further includes a buffer tank (23) and a suction fan (24); The buffer tank (23) is arranged on the second connecting pipeline (21). The air outlet of the throttle orifice plate assembly (G) in the igniter air supply unit (2) is communicated with the first air inlet of the buffer tank (23). The air outlet of the exhaust fan (24) is communicated with the second air inlet of the buffer tank (23). The air outlet of the buffer tank (23) is communicated with the igniter (41).

6. The air supply regulating device based on pure ammonia fuel according to claim 5, wherein: The igniter air supply unit (2) further includes a third valve (25); The third valve (25) is arranged between the exhaust fan (24) and the buffer tank (23).

7. The air supply regulating device based on pure ammonia fuel according to claim 3, characterized in that: The throttle pipeline (G1) and the throttle orifice plate (G2) are connected by welding.

8. The air supply regulating device based on pure ammonia fuel according to claim 3, characterized in that: The diameter of the throttle orifice in the throttle orifice plate (G2) is 1-3 mm.

9. The air supply regulating device based on pure ammonia fuel according to claim 3, characterized in that: The n is 2 or 3.

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