JP3242855U - Ammonia combustion preheating ignition system - Google Patents

Abstract

A highly safe ammonia combustion preheating ignition system is provided. An ammonia combustion preheating ignition system includes a co-firing nozzle (1), an ammonia supply line (2), a first heater (22), a gas supply line (3), a second heater (32), and an ignition device (4). Co-firing nozzle 1 includes a housing having a cavity. One end of the ammonia supply line 2 is connected to an ammonia gas source 5, and the other end is provided with an ammonia gas outlet connected to the cavity. A first heater 22 is provided at the end of the ammonia supply line 2 near the ammonia gas outlet and is used to heat the ammonia gas. One end of the gas supply line 3 is connected to an air source, the other end is provided with an air outlet, and the air outlet is connected to the cavity so that the air and ammonia gas are mixed in the cavity to form a mixed gas. A second heater 32 is provided at the end of the gas supply line 3 near the air outlet and is used to heat the air, and an igniter 4 is provided in the cavity to ignite the mixed gas in the cavity. [Selection drawing] Fig. 1

Description

TECHNICAL FIELD The present invention relates to the technical field of ammonia gas combustion, and more particularly to an ammonia combustion preheating ignition system.

In the background of carbon peaking out and carbon neutrality, ammonia will replace traditional fossil fuels and become one of the trends of future development. Ammonia has a high ignition energy in the air at normal pressure, and is difficult to ignite with a general electronic ignition method. In the related technology, the ignition energy can be reduced by preheating ammonia and air, and the ignition of ammonia gas by electronic ignition can be realized in actual facilities. Since the method of preheating by mixing ammonia gas and air is used, the preheating becomes unstable and the explosion is likely to occur.

The present invention aims to solve one of the technical problems in the related art to some extent.

Therefore, the embodiment of the present invention provides an ammonia combustion preheating ignition system with the advantages of preheating ammonia gas and air before ignition, reducing the risk of mixed preheating, and increasing safety. .

An ammonia combustion preheating ignition system according to an embodiment of the present invention includes:
a co-firing nozzle including a housing having a cavity therein;
an ammonia supply line having one end connected to an ammonia gas source and the other end provided with an ammonia gas outlet connected to the cavity;
a first heater provided at an end of the ammonia supply line near the ammonia gas outlet for heating the ammonia gas in the ammonia supply line;

a gas supply line having one end connected to an air source and the other end provided with an air outlet connected to said cavity such that air and ammonia gas are mixed in said cavity to form a gas mixture; ,
a second heater provided at an end of the gas supply line near the air outlet for heating the air in the gas supply line;
an igniter provided within the cavity for igniting the gas mixture within the cavity.

In the ammonia combustion preheating ignition system according to the embodiment of the present invention, the ammonia gas and the air are preheated respectively before entering the co-firing nozzle, so that the ignition energy can be reduced and the ignition can be facilitated. In addition, since mixed preheating has a certain risk, the ammonia combustion preheating ignition system according to the embodiment of the present invention can preheat ammonia gas and air separately, so that the ignition safety is improved.
Therefore, the ammonia combustion preheating ignition system according to the embodiment of the present invention has the advantage of high safety.

In some embodiments, the housing includes a first inlet, a second inlet, and a combustion port in communication with the cavity, the first inlet connected to the ammonia gas outlet, and the A second inlet is connected to the air outlet, and the combustion port is provided at an end of the housing remote from the first and second inlets for discharging gas after combustion.

In some embodiments, the housing includes an ignition section and a combustion section connected in series, the ignition section below the combustion section in the height direction of the co-combustion nozzle, and the first inlet comprises: in communication with said ammonia gas outlet and said ignition section, said second inlet in communication with said air outlet and said ignition section, said combustion port at an end of said combustion section remote from said ignition section, said An ignition device is provided in the ignition section.

In some embodiments, the cross-sectional area of the combustion section gradually decreases in a direction from the ignition section toward the combustion section.

In some embodiments, the co-firing nozzle further includes a first connecting tube and a second connecting tube, one end of the first connecting tube being connected to the ignition section, and the first connecting tube the other end of which forms said first inlet, one end of said second connecting tube is connected to said ignition section, and the other end of said second connecting tube forms said second inlet.

In some embodiments, the cross-sectional area of the ignition section is constant along the height direction of the co-firing nozzle, and the axis of the first connecting tube and/or the axis of the second connecting tube Orthogonal to the axis of the ignition section.

In some embodiments, the axis of the first connecting tube is parallel to the axis of the second connecting tube, and between the axis of the first connecting tube and the axis of the second connecting tube There is an interval.

In some embodiments, the ammonia combustion preheating ignition system includes an ammonia gas tank, an air compressor and a surge tank, an outlet of the ammonia gas tank is connected to one end of the ammonia supply line, and the air compressor is connected to the It is connected to a surge tank, and the outlet of said surge tank is connected to one end of said gas supply line.

In some embodiments, a first flow meter provided in the ammonia supply line and positioned between the first heater and the ammonia gas tank; and a second flow meter provided in the gas supply line and positioned between the first heater and the ammonia gas tank. and a second flow meter positioned between the heater of and the surge tank.

Some embodiments further include a battery connected to the ignition device.

1 is a schematic configuration diagram of an ammonia combustion preheating ignition system according to an embodiment of the present invention; FIG. 1 is a schematic structural diagram of a co-firing nozzle of an ammonia combustion preheating ignition system according to an embodiment of the present invention; FIG. 1 is a schematic structural diagram of a co-firing nozzle of an ammonia combustion preheating ignition system according to an embodiment of the present invention; FIG. FIG. 4 is a schematic cross-sectional view taken along line AA in FIG. 3;

Embodiments of the invention will now be described in detail, examples of which are illustrated in the drawings. The embodiments described below with reference to the drawings are illustrative and are intended to illustrate the invention and should not be understood as a limitation to the invention.

As shown in FIGS. 1 to 4, the ammonia combustion preheating ignition system according to the embodiment of the present invention includes a co-firing nozzle 1, an ammonia supply line 2, a first heater 22, an air supply line 3, a second heater. 32 and ignition device 4 .

The co-firing nozzle 1 includes a housing 11 having a cavity 113 therein. One end of the ammonia supply line 2 is connected to an ammonia gas source, and the other end of the ammonia supply line 2 is provided with an ammonia gas outlet 21 connected to the cavity 113 . A first heater 22 is provided at the end of the ammonia supply pipeline 2 near the ammonia gas outlet 21 , and the first heater 22 is used to heat the ammonia gas in the ammonia supply pipeline 2 . One end of the air supply pipe 3 is connected to an air source, and the other end of the air supply pipe 3 is provided with an air outlet 31 through which air and ammonia gas are mixed in the cavity 113 to produce a mixed gas. is connected to the cavity 113 so that a is formed. A second heater 32 is provided at the end of the air supply line 3 near the air outlet 31 , and the second heater 32 is used to heat the air in the air supply line 3 . The ignition device 4 is provided within the cavity 113 and ignites the mixed gas within the cavity 113 .

Specifically, as shown in FIG. 1, the other end of the ammonia supply pipe 2 is connected to the housing 11, and the ammonia gas outlet 21 of the ammonia supply pipe 2 communicates with the cavity 113 of the co-firing nozzle 1. Ammonia gas can be introduced into the cavity 113 of the co-firing nozzle 1 via the ammonia gas outlet 21 . The other end of the air supply pipe 3 is connected to the housing 11 , and the air outlet 31 of the air supply pipe 3 communicates with the cavity 113 of the co-firing nozzle 1 , thereby supplying air to the cavity of the co-firing nozzle 1 through the air outlet 31 . 113.

In addition, since the first heater 22 is provided in the ammonia supply pipe 2 , after heating the ammonia gas in the ammonia supply pipe 2 , the heated ammonia gas is discharged from the co-firing nozzle 1 through the ammonia gas outlet 21 . can be introduced into the cavity 113 and likewise a second heater 32 is provided in the air supply line 3 to heat the air in the air supply line 3 and then via the air outlet 31 after heating of air can be introduced into the cavity 113 of the co-firing nozzle 1 .

That is, before the co-firing nozzle 1 is ignited by the ignition device 4, the mixed gas of the heated ammonia gas and air is contained in the cavity 113 of the co-firing nozzle 1, so that the mixed gas can be easily can be ignited.

In other words, the ammonia gas and air in the ammonia combustion preheating ignition system according to the embodiment of the present invention are respectively preheated before flowing into the mixed combustion nozzle 1, thereby reducing ignition energy and facilitating ignition. can. In addition, since mixed preheating has a certain risk, the ammonia combustion preheating ignition system according to the embodiment of the present invention can preheat ammonia gas and air separately, so that the ignition safety is improved.

Therefore, the ammonia combustion preheating ignition system according to the embodiment of the present invention has the advantage of high safety.

The first heater 22 and the second heater 32 may be electric heaters, or may be devices that heat using other energy. Preferably, the first heater 22 and the second heater 32 are temperature-adjustable heaters, i.e., the first heater 22 and the second heater 32 can be adjusted according to the combustion effect to achieve different heating effects. can be set to different temperatures.

Alternatively, one of the first heater 22 and the second heater 32 may be used for heating. Since the air is heated and the first heater 22 is turned off, the air after heating and the ammonia gas are mixed more than when the first heater 22 and the second heater 32 are turned on at the same time. The air in the air supply line 3 must be heated to a higher temperature in order to ensure that the predetermined ignition temperature is reached after the ignition.

Optionally, the ammonia combustion preheating ignition system further includes an ammonia gas tank 5, an air compressor and a surge tank, the outlet of the ammonia gas tank 5 is connected to one end of the ammonia supply line 2, and the air compressor is connected to the surge tank. , and the outlet of the surge tank is connected to one end of the air supply line 3 .

Specifically, as shown in FIG. 1, the outlet of the ammonia gas tank 5 is connected to one end of the ammonia supply pipe line 2 to supply the co-firing nozzle 1 with the ammonia gas source. The air compressor is connected to the surge tank to ensure the stability of pneumatic transportation. The outlet of the surge tank is connected to one end of the air supply line 3 to provide the co-firing nozzle 1 with an air source.

Preferably, the ammonia combustion preheating ignition system further includes a first flow meter and a second flow meter, the first flow meter being provided in the ammonia supply line 2 and connecting the first heater 22 and the ammonia gas tank 5. A second flow meter is located in the air supply line 3 and between the second heater 32 and the surge tank.

Specifically, as shown in FIG. 1, a first flow meter is provided in the ammonia supply line 2 to measure the ammonia gas flow rate in the ammonia supply line 2, and a second flow meter measures the flow rate of the air supply. It is provided in the pipeline 3 and measures the air flow rate in the air supply pipeline 3 to ensure that the ammonia gas and the air are mixed in the co-firing nozzle 1 in a predetermined proportion.

A first switch is further provided between the first flow meter and the ammonia gas tank 5, and a second switch is provided between the second flow meter and the surge tank, whereby the ammonia supply pipe line 2 and air supply line 3 can be ensured.

Preferably, the ammonia combustion preheating ignition system further includes a storage battery connected to the ignition device 4 . That is, the ignition device 4 is an electric ignition device, and the storage battery is connected to the ignition device 4 to provide the electric energy required for ignition for the ignition device 4, and of course other methods. can be ignited with

In some embodiments, the housing 11 includes a first inlet 1111, a second inlet 1112 and a combustion port 1121 in communication with the cavity 113, the first inlet 1111 connected to the ammonia gas outlet 21 and a second The inlet 1112 of is connected to the air outlet 31, and the combustion port 1121 is provided at the end of the housing 11 remote from the first inlet 1111 and the second inlet 1112, and is used to discharge gas after combustion. .

Specifically, as shown in FIGS. 2 to 4, the combustion port 1121 is provided at the upper end of the co-firing nozzle 1 between the combustion port 1121 and the first inlet 1111 and the second inlet 1112. is spaced. This ensures that the ammonia gas and air are sufficiently mixed within the cavity 113 of the co-firing nozzle 1 .

After the mixed gas in the co-firing nozzle 1 is ignited, the burned flame can be ejected from the combustion port 1121, and the gas after combustion can also be discharged via the combustion port 1121.

In some embodiments, the housing 11 includes an ignition section 112 and a combustion section 111 that are connected in series, the ignition section 112 being below the combustion section 111 in the height direction of the co-firing nozzle 1 and the first An inlet 1111 communicates with the ammonia gas outlet 21 and the ignition section 112, a second inlet 1112 communicates with the air outlet 31 and the ignition section 112, and a combustion port 1121 is at the end of the combustion section 111 remote from the ignition section 112. provided, and the ignition device 4 is provided in the ignition section 112 .

Specifically, as shown in FIGS. 2-4, the combustion section 111 is located above the ignition section 112, and the ammonia gas passes sequentially through the ammonia gas outlet 21, the first inlet 1111, and into the ignition section. 112 and the air can enter the ignition section 112 through the air outlet 31 , the second inlet 1112 in sequence.

It should be noted that the combustion port 1121 is located at the upper end of the combustion section 111 and is spaced from the first inlet 1111 and the second inlet 1112 so that the mixing of the ammonia gas and air is more beneficial and are mixed, the mixture can be ignited using the igniter 4 located in the ignition section 112 .

Preferably, the cross-sectional area of combustion section 111 gradually decreases in the direction from ignition section 112 toward combustion section 111 . 2 and 4, the cross-sectional area of the combustion section 111 gradually decreases from bottom to top, that is, after the gas mixture in the cavity 113 of the co-firing nozzle 1 is ignited, the bottom of the combustion section 111 is The wide, narrow top structure allows the burned flame to be projected farther and more focused.

In some embodiments, the co-firing nozzle 1 further includes a first connecting pipe 12 and a second connecting pipe 13, one end of the first connecting pipe 12 is connected to the ignition section 112, and the first connecting pipe The other end of 12 forms a first inlet 1111 , one end of the second connecting tube 13 is connected to the ignition section 112 , and the other end of the second connecting tube 13 forms a second inlet 1112 .

Specifically, as shown in FIGS. 2 to 4, the rear end of the first connecting tube 12 is connected to the ignition section 112, and the front end of the first connecting tube 12 is open to the first inlet 1111. , the front end of the second connecting tube 13 is connected to the ignition section 112 and the rear end of the second connecting tube 13 is open to form a second inlet 1112 .

By connecting the first connecting pipe 12 between the ammonia supply pipe 2 and the co-firing nozzle 1, the connection of the ammonia supply pipe 2 is facilitated. The shape of can be changed according to the shape of the ammonia gas outlet 21 of the ammonia supply pipe to accommodate different shaped ammonia gas outlets 21 . Similarly, by connecting the second connection pipe 13 between the air supply pipe 3 and the co-firing nozzle 1, the connection of the air supply pipe 3 is facilitated.

In some embodiments, the cross-sectional area of the ignition section 112 is constant along the altitude direction of the co-firing nozzle 1, and the axis of the first connecting tube 12 and/or the axis of the second connecting tube 13 are aligned with the ignition section 112. perpendicular to the axis of

Specifically, as shown in FIGS. 2-4, the cross-section of ignition section 112 is circular, ie, ignition section 112 is cylindrical. The axis of the first connecting pipe 12 is perpendicular to the axis of the ignition section 112, or the axis of the second connecting pipe 13 is perpendicular to the axis of the ignition section 112, or the axis of the first connecting pipe 12 and the first connecting pipe The axes of the two connecting tubes 13 are both perpendicular to the axis of the ignition section 112 .

The extending direction of the axis of the ignition section 112 coincides with the vertical direction, and the extending direction of at least one of the axis of the first connection pipe 12 and the axis of the second connection pipe 13 is perpendicular to the vertical direction. .

Preferably, the axis of the first connecting tube 12 is parallel to the axis of the second connecting tube 13, and there is a gap between the axis of the first connecting tube 12 and the axis of the second connecting tube 13. . For example, as shown in FIG. 2, the extending direction of the axis of the first connecting pipe 12 and the extending direction of the axis of the second connecting pipe 13 coincide with the front-rear direction, and The axis of the connecting pipe 12 and the axis of the second connecting pipe 13 are spaced apart in the left-right direction.

That is, the ammonia gas and the air pass through the first connecting pipe 12 and the second connecting pipe 13 respectively and enter the cavity 113 of the co-firing nozzle 1, and when the gas enters the co-firing nozzle 1, the flow direction of the gas is ignited. In contact with the side wall of the section 112, the ammonia gas and air are mixed annularly in the co-firing nozzle 1, making the mixing more thorough and favorable to the ignition of the mixed gas.

In the description of the present invention, "center", "longitudinal", "horizontal", "length", "width", "thickness", "top", "bottom", "front", "back", "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise", "Axial", "Radial" ”, “circumferential direction”, etc. are the orientations or positional relationships shown based on the drawings, and are for easy explanation and simplification of the present invention. should not be construed as limitations on the invention, as they do not indicate or imply that the device or element being supported must have a particular orientation, or be constructed or operated in a particular orientation. Please understand.

Also, the terms "first" and "second" are used for descriptive purposes only and are to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. should not be done. Thus, features defined by "first" and "second" may express or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless specifically limited.

In the present invention, terms such as "attach", "connect", "connect", "fix" should be understood broadly unless explicitly defined and limited. For example, it may be a fixed connection, a removable connection, or an integral one. It may be a mechanical connection, it may be an electrical connection, or it may be able to communicate with each other. It may be a direct connection, an indirect connection through an intermediate medium, an internal communication between two parts, or an interaction relationship between two parts. A person skilled in the art can understand the specific meaning of the above terms in the present invention according to the specific situation.

In the present invention, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first feature is in direct contact, unless expressly specified and limited. and the second feature may be in indirect contact through an intermediate medium. And that the first feature is "above", "above" or "top" the second feature indicates that the first feature is directly above or diagonally above the second feature, or It only indicates that the horizontal height is higher than the second feature. A first feature being "below", "below" or "below" a second feature indicates that the first feature is directly below or diagonally below the second feature, or at the horizontal height of the first feature. is lower than the second feature.

In the present invention, terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" are described in accordance with the embodiment or example. It is indicated that the specific features, structures, materials or features described herein are included in at least one embodiment or example of the present invention. Exemplary descriptions of such terms in this specification are not necessarily directed to the same embodiment or example. And the specific features, structures, materials or features described may be combined in any suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can combine and combine different embodiments or examples, and features of different embodiments or examples, described herein, unless contradicted by each other.

Although the above embodiments have been shown and described, the above embodiments are illustrative and should not be construed as limitations on the invention, and any alterations, modifications, permutations and variations of the above embodiments may occur to those skilled in the art. is also within the protection scope of the present invention.

1 mixed combustion nozzle 11 housing 111 combustion section 1111 first inlet 1112 second inlet 112 ignition section 1121 combustion port 113 cavity 12 first connecting pipe 13 second connecting pipe 2 ammonia supply pipe 21 ammonia gas outlet 22 first heater 3 air (gas) supply line 31 air outlet 32 second heater 4 ignition device 5 ammonia gas tank 61 air compressor 62 surge tank 71 first flow meter 72 second flow meter 73 first switch 74 second 2 switch 8 storage battery

Claims (10)

An ammonia combustion preheating ignition system,
a co-firing nozzle including a housing having a cavity therein;
an ammonia supply line having one end connected to an ammonia gas source and the other end provided with an ammonia gas outlet connected to the cavity;
a first heater provided at an end of the ammonia supply line near the ammonia gas outlet for heating the ammonia gas in the ammonia supply line;
a gas supply line having one end connected to an air source and the other end provided with an air outlet connected to said cavity such that air and ammonia gas are mixed in said cavity to form a gas mixture; ,
a second heater provided at an end of the gas supply line near the air outlet for heating the air in the gas supply line;
an igniter provided within the cavity for igniting a gas mixture within the cavity;
An ammonia combustion preheating ignition system characterized by: The housing includes a first inlet, a second inlet, and a combustion port in communication with the cavity, the first inlet being connected to the ammonia gas outlet and the second inlet being connected to the air. connected to an outlet, wherein the combustion port is provided at an end of the housing remote from the first inlet and the second inlet and is used to discharge gas after combustion;
The ammonia combustion preheating ignition system according to claim 1, characterized in that: The housing includes an ignition section and a combustion section connected in series, the ignition section being located below the combustion section in the height direction of the co-firing nozzle, and the first inlet being the ammonia gas outlet and the ignition section. section, said second inlet communicating with said air outlet and said ignition section, said combustion port being located at an end of said combustion section remote from said ignition section, said ignition device being in said ignition section; to be provided
The ammonia combustion preheating ignition system according to claim 2, characterized in that: a cross-sectional area of the combustion section gradually decreases in a direction from the ignition section toward the combustion section;
The ammonia combustion preheating ignition system according to claim 3, characterized in that: The co-firing nozzle further includes a first connection pipe and a second connection pipe, one end of the first connection pipe is connected to the ignition section, and the other end of the first connection pipe is the first connection pipe. one end of said second connecting tube is connected to said ignition section and the other end of said second connecting tube forms said second inlet.
The ammonia combustion preheating ignition system according to claim 4, characterized in that: The cross-sectional area of the ignition section is constant along the height direction of the co-firing nozzle, and the axis of the first connecting pipe and/or the axis of the second connecting pipe are perpendicular to the axis of the ignition section. ,
The ammonia combustion preheating ignition system according to claim 5, characterized in that: the axis of the first connecting tube is parallel to the axis of the second connecting tube, and there is a gap between the axis of the first connecting tube and the axis of the second connecting tube;
The ammonia combustion preheating ignition system according to claim 6, characterized in that: The ammonia combustion preheating ignition system includes an ammonia gas tank, an air compressor and a surge tank, an outlet of the ammonia gas tank is connected to one end of the ammonia supply pipe, the air compressor is connected to the surge tank, and the an outlet of the surge tank is connected to one end of the gas supply line;
The ammonia combustion preheating ignition system according to claim 1, characterized in that: a first flow meter provided in the ammonia supply line and positioned between the first heater and the ammonia gas tank; and a second heater provided in the gas supply line and the surge tank. a second flow meter located between
The ammonia combustion preheating ignition system according to claim 8, characterized in that: further comprising a storage battery connected to the ignition device;
The ammonia combustion preheating ignition system according to any one of claims 1 to 9, characterized in that:

Images