CN115978535A - Hydrogen combustor - Google Patents

Abstract

The invention discloses a hydrogen burner, which comprises an air supply pipe, a core body assembly and an air supply host, wherein the first end of the air supply pipe is butted with the air supply host; the core body assembly comprises a combustion head and a feeding pipe, the combustion head is arranged in the air supply pipe and is close to the second end of the air supply pipe, the combustion head comprises a base body and a plurality of spray heads distributed on the base body, and an igniter is further arranged on the base body between the spray heads; the air supply host comprises a closed outer shell, an air supply cavity is constructed in the outer shell, an impeller is arranged in the air supply cavity, and an air volume control mechanism communicated with the air supply cavity is further arranged outside the outer shell. The beneficial effects of the above technical scheme are: the air supply pipe can guide air to the front of the combustion head, mix the air with the hydrogen sprayed from the spray head, and burn the air outside the air supply pipe. Before burning and after burning can also sweep the blast pipe inside through the air feed host computer to guarantee can not remain hydrogen, it is safer.

Description

Hydrogen combustor

Technical Field

The invention relates to the technical field of burners, in particular to a hydrogen burner.

Background

At present, all combustors in industrial application mainly burn natural gas and fuel oil, and are not suitable for burning hydrogen. In addition, the hydrogen burners related to the invention patents CN101871646A and CN102297426A are provided with a stable combustion chamber at the front part of the spray head, and hydrogen and air are forcibly mixed before the stable combustion chamber, and the design structure increases the risk of explosion of the mixed hydrogen in the mixing chamber during tempering.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides the hydrogen combustor which can avoid the premixing of hydrogen and air in the air supply pipe and improve the safety of hydrogen combustion.

The invention provides a technical scheme that: a hydrogen combustion engine comprising:

the first end of the blast pipe is butted with the air supply main machine;

the core body assembly comprises a combustion head and a feeding pipe, the combustion head is arranged in the air supply pipe and is close to the second end of the air supply pipe, the combustion head comprises a base body and a plurality of spray heads distributed on the base body, igniters are further arranged on the base body between the spray heads, the spray heads face the outside of the air supply pipe, and the feeding pipe extends into the air supply pipe from the outside and is communicated with the combustion head; and (c) a second step of,

the air supply host comprises a closed outer shell, an air supply cavity is constructed in the outer shell, an impeller is arranged in the air supply cavity, a first motor for driving the impeller is arranged outside the outer shell, an air volume control mechanism communicated with the air supply cavity is further arranged outside the outer shell, and an air door with an adjustable size is arranged at an air inlet of the air volume control mechanism.

The beneficial effects of the above technical scheme are: the air supply pipe is arranged to guide the air flowing in the air supply main machine to the front of the combustion head, mix the air with the hydrogen sprayed by the spray head and burn the air outside the air supply pipe. Before burning and after burning can also sweep the blast pipe inside through the air feed host computer to guarantee can not remain hydrogen, it is safer.

Further, the shell body comprises a lower shell body and an upper shell body which are connected together, the impeller is located in the lower shell body, the upper shell body is further provided with a flame observation hole and a flame detector, and the flame detector extends into the air supply cavity. The flame observation hole and the flame detector are convenient for mastering the combustion condition of the hydrogen.

Furthermore, the air volume control mechanism is located on one side, back to the first motor, of the shell body, the air volume control mechanism comprises an additional shell, the additional shell is attached to the shell body, a ventilation window is formed in the position, corresponding to the additional shell, of the shell body, and the air inlet is located at the bottom of the additional shell. The additional shell facilitates installation of the air door.

Furthermore, the air door is rotatably arranged in the additional shell through a rotating shaft, two ends of the rotating shaft extend out of the additional shell, a second motor for driving the air door is arranged outside the additional shell, and the second motor is in transmission connection with the rotating shaft. The second motor drives the air door to rotate, so that the air inlet gap of the air door at the air inlet is changed, and the air inlet amount is adjusted.

Furthermore, a rotation angle measuring instrument is further arranged on one side, back to the second motor, of the additional shell, and the rotation angle measuring instrument is connected with the rotating shaft. The rotation angle of the air door and the rotating shaft can be known through the rotation angle measuring instrument, and then the opening degree of the air door is determined.

Furthermore, the position of the feeding pipe, which is positioned outside the air supply pipe, is also provided with a flow regulating valve, and the flow regulating valve is connected with the second motor through a connecting rod assembly so as to synchronously act with the air door. The synchronous action of the air door and the flow regulating valve enables the air supply quantity of the air supply pipe to be matched with the supply quantity of the hydrogen, and further the optimal combustion state is ensured. The size of the flame can also be adjusted.

Furthermore, the feeding pipe is provided with a first electromagnetic valve and a second electromagnetic valve in sequence in the upstream direction of the relative flow regulating valve. The first electromagnetic valve and the second electromagnetic valve are used for controlling the feeding pipe, so that the safety of supply is ensured.

And the air supply device further comprises a pressure difference switch, and two pressure detection interfaces of the pressure difference switch are respectively communicated with the inside of the additional shell and the air supply cavity.

Further, the point firearm includes the arc emergence head and ignition controller, the base member is the annular, the arc emergence head by the centre bore of base member is worn out extremely the place ahead of shower nozzle, ignition controller fixes on the shell body.

Drawings

In order to more clearly illustrate the detailed description of the invention or the technical solutions in the prior art, the drawings that are needed in the detailed description of the invention or the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.

FIG. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is a schematic view of a cut-away blower tube according to an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of another embodiment of the present invention;

FIG. 4 is a schematic bottom view of the present invention;

FIG. 5 is a schematic sectional view of the outer casing according to the embodiment of the present invention;

FIG. 6 is a schematic view of a cut-away additional housing according to an embodiment of the present invention;

FIG. 7 is a control flow chart of an embodiment of the present invention.

Reference numerals: the air supply device comprises an air supply main machine 100, a lower shell 110, a ventilation window 111, an upper shell 120, a flame observation hole 121, a flame detector 122, an air supply pipe 200, a supply pipe 300, a first electromagnetic valve 310, a second electromagnetic valve 320, a flow regulating valve 330, a base body 400, a spray head 410, an arc generation head 500, an ignition controller 510, an additional shell 600, an air inlet 610, a damper 620, a rotating shaft 621, a second motor 630, a rotating angle measuring instrument 640, a first connecting rod 650, a second connecting rod 660, a first motor 700, an impeller 710, a control box 800 and a differential pressure switch 900.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.

It is to be noted that, unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the invention pertains.

As shown in fig. 1 to 7, the present embodiment provides a hydrogen combustion machine, which includes an air supply pipe 200, a core assembly, and an air supply main unit 100, wherein a first end of the air supply pipe 200 is butted with the air supply main unit 100; the core assembly comprises a combustion head and a feed pipe 300, the combustion head is arranged in the blast pipe 200 and close to the second end of the blast pipe 200, the combustion head comprises a base 400 and a plurality of spray heads 410 distributed on the base 400, igniters are further arranged on the base 400 between the spray heads 410, the spray heads 410 face the outside of the blast pipe 200, and the feed pipe 300 extends into the blast pipe 200 from the outside and is communicated with the combustion head; the air supply host 100 comprises a closed outer shell, an air supply cavity is constructed in the outer shell, an impeller 710 is arranged in the air supply cavity, a first motor 700 for driving the impeller 710 is arranged outside the outer shell, an air volume control mechanism communicated with the air supply cavity is further arranged outside the outer shell, and an air door 620 with adjustable size is arranged at an air inlet 610 of the air volume control mechanism.

When in use, the air supply pipe 200 is arranged to guide the air flowing in the air supply main machine 100 to the front of the combustion head and mix with the hydrogen sprayed from the spray nozzle 410, the air is ignited and combusted by the igniter, and the spray nozzle 410 arranged at the second end can spray the flame from the nozzle at the second end of the air supply pipe 200 and combust in the hearth. Before burning and after burning can also be through air feed main engine 100 to blow the blast pipe 200 inside to guarantee can not remain hydrogen, it is safer.

The air supply pipe 200 is a circular pipe body, and the impeller 710 is installed in the air supply outer shell, so the shape of the outer shell needs to be adapted to the air supply pipe 200 and the impeller 710, for this purpose, the outer shell is arranged to include the lower shell 110 and the upper shell 120 which are connected together, the impeller 710 is located in the lower shell 110, the air supply pipe 200 is also fixed in a butt joint manner with the upper shell 120, the upper shell 120 is further provided with a flame observation hole 121 and a flame detector 122, and the flame detector 122 extends into the air supply cavity. The flame observation hole 121 and the flame detector 122 are arranged to facilitate grasping of the combustion condition of the hydrogen. The flame detector 122 is a ultraviolet (infrared) or plasma flame detector 122, when the flame is not ignited successfully or the flame is extinguished accidentally, a signal is sent out to control the burner to enter a shutdown program, and a safety shutdown sends out an alarm signal, so that safety accidents such as explosion and the like caused by hydrogen accumulation can be effectively prevented. A control box 800 is also connected to the outside of the outer housing to accommodate the control system.

Hydrogen burns behind the mixed air, will air volume control mechanism is located the shell body is back to one side of first motor 700, air volume control mechanism includes an additional shell 600, additional shell 600 laminate in the shell body, the shell body corresponds ventilation window 111 has been seted up to additional shell 600's position, air intake 610 is located additional shell 600's bottom. The additional housing 600 facilitates installation of the damper 620. After the first motor 700 is started, the impeller 710 is driven to suck the external air into the air supply cavity from the air inlet 610, and the external air is pressed into the air supply pipe 200 under the driving of the impeller 710.

In order to carry out quantized control to the air input, will air door 620 through a pivot 621 rotate set up in the additional shell 600, the both ends of pivot 621 all stretch out additional shell 600, the outside of additional shell 600 is provided with the drive the second motor 630 of air door 620, second motor 630 with the pivot 621 transmission links to each other. The second motor 630 drives the damper 620 to rotate, so as to change the air inlet gap of the damper 620 at the air inlet 610, thereby adjusting the air inlet amount. When the air door 620 is rotated to the horizontal state, the air inlet 610 is completely covered, and the air inlet volume is zero at this time, and when the air door 620 is rotated to the vertical state, the air inlet 610 is completely opened, and the air inlet volume reaches the maximum at this time.

The opening condition of the air door 620 cannot be visually seen, in order to clearly see the state of the air door 620, a rotation angle measuring instrument 640 is further arranged on one side of the additional shell 600, which is back to the second motor 630, and the rotation angle measuring instrument 640 is connected with the rotating shaft 621. The rotation angle of the damper 620 together with the rotation shaft 621 can be known by the rotation angle measuring instrument 640, and the opening degree of the damper 620 can be determined.

The adjustment of the flame size during combustion includes at least two elements, one is the flow of hydrogen and the other is the flow of air, in order to perform a comprehensive adjustment of the flame, a flow adjusting valve 330 is further disposed at a position of the supply pipe 300 outside the blast pipe 200, and the flow adjusting valve 330 is connected to the second motor 630 through a connecting rod assembly to operate synchronously with the damper 620. Specifically, the link assembly includes a first link 650 fixedly connected to an output shaft of the second motor 630, the first link 650 is hinged to a second link 660, and the second link 660 is connected to the flow control valve 330, so that the second motor 630 can drive the flow control valve 330 to adjust when rotating. When the damper 620 is adjusted to be large, the flow rate adjustment valve 330 is also adjusted to be large, and correspondingly, when the damper 620 is adjusted to be small, the flow rate adjustment valve 330 is also adjusted to be small. The damper 620 and the flow rate adjustment valve 330 are synchronized to match the amount of air supplied from the air supply duct 200 with the amount of hydrogen supplied, thereby ensuring an optimal combustion state. The size of the flame can also be adjusted.

The flow of hydrogen gas needs to be effectively controlled, and in order to prevent a safety accident such as leakage, a first solenoid valve 310 and a second solenoid valve 320 are sequentially provided in the supply pipe 300 in an upstream direction with respect to a flow rate adjustment valve 330. The supply pipe 300 is controlled by the first solenoid valve 310 and the second solenoid valve 320, so that the safety of supply is ensured. Two solenoid valves increase the fault tolerance rate for a fault.

In order to improve the safety, the air supply device further comprises a differential pressure switch 900, and two pressure detection interfaces of the differential pressure switch 900 are respectively communicated with the inside of the additional shell 600 and the air supply cavity. When the pressure exceeds the protection set value, the differential pressure switch 900 immediately sends a signal to control the combustor to enter an emergency shutdown procedure, so that the equipment is safely shut down and sends an alarm signal.

In a preferred embodiment, the igniter includes an arc generating head 500 and an ignition controller 510, the base 400 is annular, the arc generating head 500 extends out of a central hole of the base 400 to the front of the nozzle 410, and the ignition controller 510 is fixed to an outer housing. The inside of the base body 400 is a chamber which communicates with the supply pipe 300, and hydrogen gas is injected from the showerhead 410 after entering the chamber through the supply pipe 300 and ignited after the arc is generated from the arc generating head 500.

When the air supply device is used, the air door 620 is opened to the maximum, the first motor 700 is started to blow the hearth, residual gas in the air supply cavity and the air supply pipe 200 is discharged, and residual hydrogen is avoided. After the purging is completed, the damper 620 is opened to the minimum, the first solenoid valve 310 and the second solenoid valve 320 are opened, so that the hydrogen passes through the supply pipe 300 and is discharged from the showerhead 410, an ignition procedure is performed to ignite the hydrogen, and after the ignition is completed, the size of the flame is adjusted by the size of the flow regulating valve 330 and the damper 620, thereby ensuring that the combustion requirement is met. After the combustion is finished, a shutdown procedure is performed, and the shutdown procedure closes the first electromagnetic valve 310 and the second electromagnetic valve 320 first, so that the flame is extinguished. The damper 620 is again opened to the maximum after the flame is extinguished and is purged by the operation of the first motor 700. The first motor 700 and the damper 620 are turned off when the purging time reaches a preset value or the furnace temperature decreases to a preset value.

In addition, the system is also provided with a special combustible gas detection safety system, the combustible gas detection safety system comprises a hydrogen detector, before ignition, the control system can detect hydrogen in the hearth and in the tail gas, and when the content of the hydrogen in the hearth and in the tail gas is detected to be lower than a set safety value, the burner system can enter an ignition program. And if not, continuing purging until the hydrogen content in the hearth and in the tail gas reaches a detection safety value.

In the description of the present application, it is to be understood that the terminology used herein is for the purpose of description only and is not intended to be interpreted as indicating or implying any relative importance or implicit indication of the number of technical features indicated. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In this application, unless expressly stated or limited otherwise, the terms "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral combinations thereof; may be an electrical connection; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the description of the present invention, numerous specific details are set forth. It is understood, however, that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, systems, and techniques have not been shown in detail in order not to obscure an understanding of this description.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description.

Claims (9)

1. A hydrogen combustion engine, comprising:

the first end of the air supply pipe (200) is butted with the air supply main machine (100);

the core assembly comprises a combustion head and a feed pipe (300), the combustion head is arranged in the blast pipe (200) and close to the second end of the blast pipe (200), the combustion head comprises a base body (400) and a plurality of spray heads (410) distributed on the base body (400), an igniter is further arranged between the spray heads (410) on the base body (400), the spray heads (410) face the outside of the blast pipe (200), and the feed pipe (300) extends into the blast pipe (200) from the outside and is communicated with the combustion head; and (c) a second step of,

the utility model provides a portable air supply device, including air supply host computer (100), air supply host computer (100) are including confined shell body, the shell body inner structure has the air feed cavity, be provided with impeller (710) in the air feed cavity, the outside of shell body is provided with the drive first motor (700) of impeller (710), the outside of shell body still be provided with the amount of wind control mechanism of air feed cavity intercommunication, air intake (610) department of amount of wind control mechanism is provided with size-adjustable air door (620).

2. A hydrogen burner as claimed in claim 1, characterized in that the outer casing comprises a lower casing (110) and an upper casing (120) connected together, the impeller (710) is located in the lower casing (110), the upper casing (120) is further provided with a flame observation hole (121) and a flame detector (122), and the flame detector (122) extends into the air supply cavity.

3. The hydrogen burner according to claim 1, wherein the air volume control mechanism is located on a side of the outer casing opposite to the first motor (700), the air volume control structure comprises an additional outer casing (600), the additional outer casing (600) is attached to the outer casing, a ventilation window (111) is formed in the outer casing corresponding to the additional outer casing (600), and the air inlet (610) is located at the bottom of the additional outer casing (600).

4. A hydrogen burner as claimed in claim 3, wherein said damper (620) is rotatably disposed in said additional housing (600) via a rotary shaft (621), both ends of said rotary shaft (621) extend out of said additional housing (600), a second motor (630) for driving said damper (620) is disposed outside said additional housing (600), and said second motor (630) is drivingly connected to said rotary shaft (621).

5. A hydrogen burner as claimed in claim 4, characterized in that the side of the additional housing (600) facing away from the second electric machine (630) is further provided with a rotation angle measuring instrument (640), the rotation angle measuring instrument (640) being connected to the rotation shaft (621).

6. A hydrogen burner as claimed in claim 4, characterized in that the feed pipe (300) is provided with a flow regulating valve (330) at a position outside the blast pipe (200), said flow regulating valve (330) being connected to the second motor (630) by means of a connecting rod assembly to act synchronously with the damper (620).

7. A hydrogen burner as claimed in claim 6, characterized in that said feed pipe (300) is further provided with a first solenoid valve (310) and a second solenoid valve (320) in sequence in the upstream direction with respect to the flow regulating valve (330).

8. A hydrogen burner according to claim 4, characterized by further comprising a differential pressure switch (900), wherein two pressure detection ports of said differential pressure switch (900) communicate respectively with the inside of said additional casing (600) and said gas supply cavity.

9. A hydrogen burner according to claim 1, characterized in that the igniter comprises an arc generating head (500) and an ignition controller (510), the base body (400) is ring-shaped, the arc generating head (500) is passed out from a central hole of the base body (400) to the front of the burner head (410), and the ignition controller (510) is fixed to an outer housing.

Images