Ignition device for hot blast stove and ignition method thereof

Abstract

The present application relates to the technical field of combustion ignition device, and particularly relates to a hot blast stove ignition device, which comprises a flame ignition assembly, a gas pipe provided with a valve, and a nozzle unit arranged at the outlet end of the gas pipe; the nozzle unit comprises a fuel bin and a guide pipe opening and a flame opening arranged in a lead-through mode, and a flap is rotatably arranged in the fuel bin, and the flap is used for improving the fuel ignition concentration in the fuel bin before ignition; ignition is completed by the flame ignition assembly and a pulse ignition device, wherein the fuel bin arranged in the nozzle unit can cooperate with the internal flap to make the gas fuel in the bin converge, thereby improving the ignition concentration, and the problem of ignition failure or flameout caused by insufficient ignition concentration in the ignition area due to direct discharge of fuel can be avoided; the ignition and fuel release processes of the device are mutually coordinated, the ignition success rate can be improved, and the device has higher use safety compared with the traditional ignition which improves the ignition rate by releasing a large amount of fuel.

Description

Technical Field

[0001] This invention relates to the field of combustion ignition device technology, specifically to a hot blast stove ignition device and its ignition method. Background Technology

[0002] In the pyrometallurgical copper industry, hot blast stoves are used to heat the blast air to the required temperature in order to improve steelmaking efficiency. They work on the principle of "heat storage". Fuel is burned in the furnace, and the high-temperature exhaust gas passes through the checker bricks and stores heat. When the checker bricks are fully heated, the hot blast stove can be switched to air supply. At this time, the valves related to combustion are closed, the valves related to air supply are opened, and the cold air is heated by passing through the checker bricks and then sent out.

[0003] Before using a hot blast stove, the fuel inside the stove needs to be ignited. Currently, high-energy igniters are often used to generate an ignition arc to establish an ignition flame. However, there is a common ignition problem: the ignition arc needs to have a certain range of fuel concentration conditions within the ignition area. Otherwise, insufficient flame intensity, flameout, and low ignition success rate often occur, affecting work efficiency. However, once the fuel is released from the combustion gas inside the stove, it will dissipate, and the local concentration is uncontrollable or unstable, which directly affects ignition.

[0004] To address the aforementioned issues, we propose designing an ignition device to provide a controllable or stable gaseous fuel concentration, enabling the ignition arc to be accurately moved to the designated area for ignition, thereby improving the ignition rate and maintaining flame intensity to prevent flameout. Therefore, we propose a hot blast stove ignition device and its ignition method. Summary of the Invention

[0005] The purpose of this invention is to address the shortcomings mentioned in the background section and provide a hot blast stove ignition device and its ignition method.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] A hot blast stove ignition device includes a pulse ignition device, the pulse ignition device comprising a high-energy igniter and a pulse ignition rod connected by a connecting wire, and further comprising:

[0008] A flame ignition assembly for delivering gaseous fuel and igniting it through the pulse ignition device includes a gas pipe fitted with a valve and a nozzle unit disposed at the outlet end of the gas pipe.

[0009] The nozzle unit includes a fuel tank and a pipe inlet and a flame outlet connected in a conductive manner. A flap is rotatably installed inside the fuel tank, and the flap is used to increase the fuel ignition concentration in the fuel tank before ignition.

[0010] The limiting sleeve has two mounting holes, in which a gas pipe and a heat insulation sleeve are respectively installed. The pulse ignition device is installed inside the heat insulation sleeve.

[0011] The heat insulation sleeve moves along the mounting hole via a drive source, and the flap opens to release gaseous fuel when the heat insulation sleeve is ignited.

[0012] Preferably, the mounting hole on which the limiting sleeve is slidably installed with the heat insulation sleeve is provided with a movable groove, and a first connecting block is provided at the point where the limiting sleeve and the movable groove are horizontally aligned.

[0013] Preferably, the heat insulation sleeve is provided with a second connecting block for sliding installation in the moving groove, and the driving source is installed between the second connecting block and the first connecting block.

[0014] Preferably, the drive source is a cylinder.

[0015] Preferably, the heat insulation sleeve and the nozzle unit adopt an L-shaped structure, and the height of the end of the pulse ignition rod corresponds to the flame port, and the flame port is provided with a fuel through hole.

[0016] Preferably, a sliding sleeve block is installed on the heat insulation sleeve, and the sliding sleeve block is provided with a sleeve hole, through which the sliding sleeve block is sleeved on the gas pipe.

[0017] Preferably, the outer side of the fuel tank is provided with a ferromagnetic baffle that is coaxially connected to the flap.

[0018] The outer wall of the fuel tank is provided with a horizontal plate, which is connected to a T-shaped frame by a spring and a telescopic rod. The T-shaped frame is provided with a trapezoidal plate head for driving the ferromagnetic baffle to flip and open.

[0019] Preferably, the inclined surface of the trapezoidal plate head is provided with a magnetic suction plate for attracting the ferromagnetic baffle.

[0020] Preferably, the vertical frame of the T-shaped frame is provided with a slot, and the heat insulation sleeve is provided with a plate for inserting into the slot. When moved to the ignition position, the plate drives the T-shaped frame to move down, causing the flap to open and release the gaseous fuel.

[0021] An ignition method for a hot blast stove ignition device, applicable to the aforementioned ignition device, wherein the specific operation steps of the ignition method are as follows:

[0022] Step 1: Control the drive source to move the heat insulation sleeve and pulse ignition device closer to the nozzle unit;

[0023] Step 2: Simultaneously open the valve on the gas pipe. At this time, the insert plate is not inserted into the slot, and the T-shaped bracket moves upward under the action of the spring tension.

[0024] Step 3: The magnetic suction plate on the T-shaped frame attracts the ferromagnetic baffle, causing the two flaps to tend to close, controlling the slope of the trapezoidal plate head to be 30-60°, so that the gaseous fuel is retained in the fuel chamber and partially flows out to the flame outlet;

[0025] Step 4: Move the insert plate into the slot. At this time, the pulse ignition rod is close to the flame nozzle, and the T-shaped bracket is pressed down to open the flap.

[0026] Step 5: The flame outlet releases sufficient fuel concentration from the fuel chamber, and ignites synchronously, with the ignition arc igniting the fuel.

[0027] Compared with the prior art, the beneficial effects of the present invention are:

[0028] This hot air furnace ignition device and its ignition method utilize a flame ignition assembly in conjunction with a pulse ignition device to achieve ignition. The fuel chamber within the nozzle unit, along with an internal flap, allows the gaseous fuel within the chamber to converge, thereby increasing the ignition concentration. This flap structure, in conjunction with a limiting sleeve, can open and close, releasing the converged fuel during ignition. This prevents ignition failure or flameout due to insufficient ignition concentration in the ignition zone caused by direct fuel discharge. The ignition and fuel release processes of this device are coordinated, improving the ignition success rate and offering higher operational safety compared to traditional ignition methods that rely on releasing large amounts of fuel to increase the ignition rate. Attached Figure Description

[0029] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0030] Figure 1 This is one of the schematic diagrams of the overall structure of the present invention;

[0031] Figure 2 This is the second schematic diagram of the overall structure of the present invention;

[0032] Figure 3 This is a schematic diagram of the limiting sleeve of the present invention;

[0033] Figure 4 This is a schematic diagram of the installation of the heat insulation sleeve and pulse ignition device of the present invention;

[0034] Figure 5 This is a schematic diagram of the flame ignition assembly of the present invention;

[0035] Figure 6 This is a schematic diagram of the nozzle unit of the present invention;

[0036] Figure 7This is a side view of the nozzle unit of the present invention;

[0037] Figure 8 This is an exploded cross-sectional view of the nozzle unit of the present invention;

[0038] Figure 9 This is a schematic diagram of the T-shaped frame of the present invention.

[0039] The meanings of the labels in the diagram are as follows:

[0040] 1. Limiting sleeve; 101. Mounting hole; 102. Moving groove; 103. First connecting block; 2. Cylinder;

[0041] 3. Insulating sleeve; 31. Sliding sleeve block; 311. Sleeve hole; 32. Second connecting block; 33. Insert plate;

[0042] 4. Pulse ignition device; 41. High-energy igniter; 42. Connecting wire; 43. Pulse ignition rod;

[0043] 5. Gas pipe; 6. Nozzle unit; 61. Connecting pipe; 62. Fuel tank; 621. Horizontal plate; 63. Flame outlet; 64. Spring; 65. Telescopic rod; 66. Flip plate; 67. T-shaped frame; 671. Trapezoidal plate head; 672. Magnetic suction plate; 6701. Slot; 68. Ferromagnetic baffle; 7. Valve. Detailed Implementation

[0044] The technical solutions of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0045] Please see Figure 1-9 The present invention will describe the above technical solution in detail through the following embodiments:

[0046] A hot blast stove ignition device includes a pulse ignition device 4. The pulse ignition device 4 includes a high-energy igniter 41 and a pulse ignition rod 43 connected by a connecting line 42. The pulse ignition device 4 is an existing mature product that ignites by generating a pulse electric spark. It also includes:

[0047] The flame ignition assembly, used to deliver gaseous fuel and ignite it through a pulse ignition device 4, includes a gas pipe 5 with a valve 7 installed, and a nozzle unit 6 disposed at the outlet end of the gas pipe 5.

[0048] like Figure 6-8As shown in the structure, in this embodiment, the nozzle unit 6 includes a fuel tank 62 and a pipe port 61 and a flame outlet 63 that are connected in a conductive manner. Two flaps 66 are rotatably installed inside the fuel tank 62. The two flaps 66 are used to increase the fuel ignition concentration in the fuel tank 62 before ignition.

[0049] The limiting sleeve 1 has two mounting holes 101, in which a gas pipe 5 and a heat insulation sleeve 3 are respectively installed. The pulse ignition device 4 is installed in the heat insulation sleeve 3.

[0050] The heat insulation sleeve 3 moves along the mounting hole 101 via a drive source. When the heat insulation sleeve 3 is ignited, the flap 66 opens to release the gaseous fuel.

[0051] The working principle of the hot air furnace ignition device and its ignition method in this embodiment is as follows: When the heat insulation sleeve 3 inside the limiting sleeve 1 is driven by the driving source, the pulse ignition device 4 installed on the heat insulation sleeve 3 moves. During the movement, the pulse ignition rod 43 approaches the flame outlet 63, and the gas gas gathered in the fuel chamber 62 is released after the flap is opened. During this process, the instantaneous concentration becomes higher, which ensures the ignition success rate and avoids the situation of flameout caused by low concentration or discontinuous fuel.

[0052] like Figure 3 As shown in the structure, the mounting hole 101 of the limiting sleeve 1 for sliding installation of the heat insulation sleeve 3 is provided with a moving groove 102, and a first connecting block 103 is provided at the horizontal alignment of the limiting sleeve 1 and the moving groove 102; the heat insulation sleeve 3 is provided with a second connecting block 32 for sliding installation in the moving groove 102, and a cylinder 2 is installed between the second connecting block 32 and the first connecting block 103 as a driving source.

[0053] like Figure 1-2 as well as Figure 6-7 As shown in the diagram, the heat insulation sleeve 3 and the nozzle unit 6 in this embodiment adopt an L-shaped structure, and the height of the end of the pulse ignition rod 43 corresponds to the flame port 63. The flame port 63 is provided with a fuel through hole, and after ignition, the flame rises to avoid directly burning the pulse ignition rod 43.

[0054] In this embodiment, as shown Figure 4 The structure shown has a sliding sleeve block 31 installed on the heat insulation sleeve 3. The sliding sleeve block 31 has a sleeve hole 311. The sliding sleeve block 31 is fitted onto the gas pipe 5 through the sleeve hole 311, ensuring that the horizontal position is consistent during movement and facilitating insertion into the slot 6701 provided on the vertical frame of the T-shaped frame 67.

[0055] like Figure 6-8The structure shown includes a ferromagnetic baffle 68 coaxially connected to a flap 66 on the outer side of the fuel tank 62; a horizontal plate 621 on the outer wall of the fuel tank 62, which is connected to a T-shaped frame 67 via a spring 64 and a telescopic rod 65; a trapezoidal plate head 671 on the T-shaped frame 67 for rotating and opening / closing the ferromagnetic baffle 68; a magnetic suction plate 672 for attracting the ferromagnetic baffle 68 on the inclined surface of the trapezoidal plate head 671; and the ferromagnetic baffle 68 can change position with the magnetic suction plate 672 through magnetic attraction. Figure 7 As shown, under the tension of spring 64, the ferromagnetic baffle 68 maintains a 45° tilt angle, and the internal flap 66 closes at 45°.

[0056] like Figure 9 The structure shown has a slot 6701 on the vertical frame of the T-shaped frame 67, and an insert plate 33 on the heat insulation sleeve 3 for inserting into the slot 6701. When it is moved to the ignition position, the insert plate 33 drives the T-shaped frame 67 to move down, causing the flap 66 to open and release the gaseous fuel.

[0057] An ignition method for a hot blast stove ignition device, applicable to the aforementioned ignition device, wherein the specific operation steps of the ignition method are as follows:

[0058] Step 1: Control cylinder 2 to drive heat insulation sleeve 3 and pulse ignition device 4 closer to nozzle unit 6;

[0059] Step 2: Simultaneously open valve 7 on gas pipe 5. At this time, insert plate 33 is not inserted into slot 6701. Under the pull of spring 64, T-shaped bracket 67 moves upward.

[0060] Step 3: The magnetic plate 672 on the T-shaped frame 67 attracts the ferromagnetic baffle 68, causing the two flaps 66 to tend to close, controlling the slope of the trapezoidal plate head 671 to 45°, so that the gaseous fuel is retained in the fuel chamber 62 and partially discharged through the flame outlet 63.

[0061] Step 4: Move the insert plate 33 into the slot 6701. At this time, the pulse ignition rod 43 is close to the flame nozzle 63, and the T-shaped bracket 67 is pressed down to open the flap 66.

[0062] Step 5: Flame outlet 63 releases sufficient fuel concentration from fuel chamber 62, ignites synchronously, the ignition arc ignites the fuel, and ignites the hot blast stove. After completion, valve 7 is closed and reset.

[0063] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), these directional indications are only used to explain the relative positional relationships and movement of the components in a specific posture. If the specific posture changes, the directional indications will also change accordingly. Furthermore, if the embodiments of the present invention involve descriptions such as "first," "second," etc., these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features.

[0064] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within the present invention.

Claims

1. A hot blast stove ignition device, comprising a pulse ignition apparatus (4) which comprises a high-energy igniter (41) and a pulse ignition rod (43) connected by a connecting line (42), characterized in that: Also include: Flame ignition assembly for conveying gaseous fuel and igniting by the pulse ignition device (4), including a gas pipe (5) provided with a valve (7), and a nozzle unit (6) provided at the outlet end of the gas pipe (5); The nozzle unit (6) comprises a fuel tank (62) and a guide pipe port (61) and a flame port (63) provided, the fuel tank (62) is rotatably installed with a flap (66), the flap (66) is used to improve the fuel ignition concentration in the fuel tank (62) before ignition; The limiting sleeve (1) is provided with two mounting holes (101), the gas pipe (5) and the heat insulation sleeve (3) are respectively installed in the two mounting holes (101), the pulse ignition device (4) is installed in the heat insulation sleeve (3), and the heat insulation sleeve (3) moves along the mounting hole (101) through the driving source; The outer side of the fuel tank (62) is provided with a ferromagnetic baffle (68) coaxially connected with the flap (66), the outer tank wall of the fuel tank (62) is provided with a horizontal plate (621), the horizontal plate (621) is connected with a T-shaped frame (67) through a spring (64) and a telescopic rod (65), and the T-shaped frame (67) is provided with a trapezoidal plate head (671) for driving the ferromagnetic baffle (68) to flip and open and close; The trapezoidal plate head (671) is provided with a magnetic attraction plate (672) on the inclined surface for attracting the ferromagnetic baffle (68); The T-shaped frame (67) is provided with a slot (6701) on the vertical frame body, and the heat insulation sleeve (3) is provided with a plug plate (33) for inserting into the slot (6701); When the heat insulation sleeve (3) moves to the ignition position for ignition, the plug plate (33) drives the T-shaped frame (67) to move downward to make the flap (66) open to release gaseous fuel.

2. The hot blast stove igniter of claim 1, wherein: The mounting hole (101) of the limiting sleeve (1) slidingly installed the heat insulation sleeve (3) is provided with a moving groove (102) in communication, and the limiting sleeve (1) is provided with a first connecting block (103) horizontally aligned with the moving groove (102).

3. The hot blast stove igniter of claim 2, wherein: The heat insulation sleeve (3) is provided with a second connecting block (32) for slidingly installed in the moving groove (102), and the driving source is installed between the second connecting block (32) and the first connecting block (103).

4. The hot blast stove igniter of claim 3, wherein: The driving source adopts a gas cylinder (2).

5. The hot blast stove igniter of claim 1, wherein: The heat insulation sleeve (3) and the nozzle unit (6) adopt an L-shaped structure, the height of the pulse ignition rod (43) corresponds to the flame port (63), and the flame port (63) is provided with a fuel through hole.

6. The hot blast stove igniter of claim 1, wherein: The heat insulation sleeve (3) is provided with a sliding sleeve block (31), the sliding sleeve block (31) is provided with a sleeve hole (311), and the sliding sleeve block (31) is sleeved on the gas pipe (5) through the sleeve hole (311).

7. A hot blast stove ignition device, suitable for the ignition device of any one of claims 1-6, the ignition method comprises the following steps: Step one: control the driving source to drive the heat insulation sleeve (3) and the pulse ignition device (4) to approach the nozzle unit (6); Step two: open the valve (7) on the gas pipe (5) at the same time, the plug (33) is not inserted into the slot (6701), the T-shaped frame (67) moves upward under the pull of the spring (64); Step three: the magnetic plate (672) on the T-shaped frame (67) attracts the ferromagnetic baffle (68), making the two flip plates (66) tend to close, the slope of the trapezoidal plate head (671) is 30-60°, the gas fuel stays in the fuel bin (62) and partially flows out of the flame port (63); Step four: move to the plug (33) inserted into the slot (6701), at this time the pulse ignition rod (43) is close to the flame port (63), the T-shaped frame (67) is pressed down so that the flip plate (66) is opened; Step five: the flame port (63) releases sufficient fuel concentration in the fuel bin (62), synchronously ignites, and the ignition arc ignites the fuel.

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