Ignition device and method for roasting furnace

Abstract

The present invention discloses an ignition device and method for a roasting furnace. A first spark plug for a main gas pipeline is provided in a windshield. An auxiliary ignition mechanism is provided on the main gas pipeline. The auxiliary ignition mechanism includes an air regulating rotary cover, a combustion box, an auxiliary gas pipeline, and a second spark plug. The combustion box is located on the outer wall of the roasting furnace and covers the outer end of the windshield. The air regulating rotary cover is rotatably mounted on the outer end of the windshield. The combustion end of the auxiliary gas pipeline and the ignition end of the second spark plug are both located in the combustion box. The second spark plug is used to ignite the combustion end of the auxiliary gas pipeline. A plurality of corresponding through holes are provided between the air regulating rotary cover and the windshield. A roasting furnace ignition method is provided, which coordinates and controls the operation of the auxiliary ignition device and the original ignition device of the roasting furnace. When the original ignition device cannot ignite smoothly, the auxiliary ignition device is controlled to ignite the original ignition device. The ignition process can be achieved by controlling a small negative pressure difference, which is simple and safe.

Description

Technical Field

[0001] The present invention relates to the technical field of roasting furnaces, in particular to an ignition device for a roasting furnace and an ignition method thereof. Background Art

[0002] Anode carbon blocks need to be kneaded before forming, and tempered asphalt needs to be added during the kneading process. Coal tar needs to be added during the tempering of the asphalt. Anode carbon blocks need to be roasted to improve their performance. For the anode carbon block roasting operation, the anode carbon blocks need to be hoisted into the anode carbon block roasting furnace, and then fillers are added in the roasting furnace to seal the anode carbon blocks and realize the roasting operation.

[0003] Because the anode carbon block itself carries a lot of asphalt, the flue gas generated in the roasting furnace during the roasting operation of the anode carbon block also contains coal tar and other substances. The carbon roasting furnace is divided into a furnace bottom, side walls, fire channel walls, cross walls, furnace top and flue according to its structure. Generally, the burner of the roasting furnace is located at the top of the furnace. The flue gas containing coal tar will gradually accumulate on the top of the furnace when it rises, and then "stick" the ignition spark of the burner, or even block the burner, causing ignition inconvenience. Multiple ignitions are required to succeed. After a long period of production, the coal tar adhering to the burner needs to be cleaned regularly to ensure the normal use of the roasting furnace, which makes the use of the roasting furnace extremely inconvenient. Summary of the Invention

[0004] The object of the present invention is to provide an ignition device and method for a roasting furnace, so as to solve the problem that the burner of the roasting furnace is difficult to ignite under the influence of flue gas and needs to be cleaned regularly.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] The ignition device according to claim 1, wherein the combustion end of the main gas pipeline is located in a wind shield inside the roasting furnace, the wind shield is provided with a first spark plug for the combustion end of the main gas pipeline, the main gas pipeline is provided with an auxiliary ignition mechanism, the auxiliary ignition mechanism comprises an air regulating rotary cover, a combustion box, an auxiliary gas pipeline and a second spark plug, the combustion box is located on the outer wall of the roasting furnace and covers the outer end of the wind shield, the air regulating rotary cover is rotatably mounted on the outer end of the wind shield, the auxiliary gas pipeline is sealingly mounted on the combustion box, and the combustion end of the auxiliary gas pipeline is located in the combustion box, the second spark plug is located in the auxiliary gas pipeline, and one end of the second spark plug extends out of the combustion end of the auxiliary gas pipeline, and the second spark plug is used for igniting the combustion end of the auxiliary gas pipeline; wherein,

[0007] The air inlet end of the auxiliary gas pipeline is provided with a tee pipe, and the tail end of the second spark plug is installed with one end of the tee pipe;

[0008] A plurality of corresponding through holes are provided between the air regulating rotary cover and the windproof cover.

[0009] A further technical solution is that the gas inlet end of the main gas pipeline is connected to the variable gas pipe and the quantitative gas pipe.

[0010] A further technical solution is that the auxiliary gas pipeline, the variable gas supply pipe and the quantitative gas supply pipe are all installed with flow control valves and manual valves.

[0011] A further technical solution is that an air supply pipe is installed on the air inlet of the combustion box.

[0012] A further technical solution is that pressure gauges are installed on both the roasting furnace and the combustion box.

[0013] A further technical solution is: the air regulating rotary cover is provided with an extension rod, the extension rod is slidably connected to a push rod, and the push rod is slidably installed in the combustion box.

[0014] A roasting furnace ignition method includes the ignition device, and the steps of the ignition method are as follows:

[0015] S1. The gas supply pipe and the through hole are both opened, and then the main gas pipeline releases gas. The first spark plug attempts to ignite. After multiple unsuccessful attempts, the main gas pipeline is closed.

[0016] S2, the auxiliary gas pipeline provides gas to the combustion box, the gas supply pipe provides a certain amount of air to the combustion box, and then the second spark plug ignites;

[0017] S3. The second spark plug ignites successfully, and the air supply to the combustion box is gradually reduced. At this time, the air regulating cover is rotated to open the through hole. The air and gas in the roaster are sucked into the combustion box through negative pressure to ensure that the pressure of the combustion box and the roaster are close.

[0018] S4. When the flame at the combustion end of the auxiliary gas pipeline becomes weak, increase the gas flow in the auxiliary gas pipeline and the air supply to the combustion box at the same time, and release the gas from the main gas pipeline to ensure that the gas pressure in the combustion box is greater than the gas pressure in the roasting furnace;

[0019] S5. The combustion end of the main gas pipeline is ignited, reducing the gas volume of the auxiliary gas pipeline and increasing the air supply to the combustion box.

[0020] A further technical solution is: in the above S4, the flame strength at the combustion end of the auxiliary gas pipeline is identified using a furnace flame television monitoring system.

[0021] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0022] An ignition device for a roasting furnace, which ignites and burns through the cooperation of an auxiliary ignition device and the original ignition device of the roasting furnace. The auxiliary ignition device is located outside the roasting furnace to prevent the smoke from the roasting furnace from "sticking" the electronic spark, ensuring that the ignition process itself is not affected by substances such as coal tar in the roasting smoke. At the same time, the original ignition device of the roasting furnace that is affected can be ignited to ensure the stability and success rate of the roasting furnace's ignition process.

[0023] The invention discloses an ignition method for a roasting furnace, which coordinates and controls the operation of an auxiliary ignition device and an original ignition device of the roasting furnace. When the original ignition device cannot ignite smoothly, the auxiliary ignition device intervenes to control the negative pressure difference between the auxiliary ignition device and the original ignition device, thereby ensuring that external flames enter the roasting furnace through a through hole and ignite the original ignition device. The ignition process can be achieved by controlling a small negative pressure difference, which is simple and safe. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 The figure is a schematic structural diagram of an ignition device for a roasting furnace according to the present invention.

[0025] Figure 2 For the present invention Figure 1 Schematic diagram of the structure of the middle windshield.

[0026] Figure 3 For the present invention Figure 1 Schematic diagram of the structure of the central air adjustment rotary cover.

[0027] Figure numerals: 1. Main gas pipeline; 2. Roasting furnace; 3. Wind shield; 4. First spark plug; 5. Auxiliary ignition mechanism; 6. Air adjustment rotary cover; 7. Combustion box; 8. Auxiliary gas pipeline; 9. Second spark plug; 10. Through hole; 11. Variable gas pipe; 12. Quantitative gas pipe; 13. Flow control valve; 14. Gas supply pipe; 15. Pressure gauge; 16. Extension rod; 17. Push rod; 18. Manual valve. DETAILED DESCRIPTION

[0028] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0029] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0030] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other.

[0031] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not require further definition or explanation in subsequent drawings.

[0032] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the inventive product is typically placed when in use, or are the orientations or positional relationships commonly understood by those skilled in the art. These terms are intended only to facilitate the description of the present invention and to simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limiting the present invention. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0033] In the description of the present invention, it should also be noted that, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections or electrical connections; they may refer to direct connections or indirect connections through an intermediate medium; and they may refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0034] Example 1:

[0035] This embodiment Figure 1 、 Figure 2 and Figure 3As shown, an ignition device for a roasting furnace includes a main gas pipeline 1, the combustion end of the main gas pipeline 1 is located in a wind shield 3 inside the roasting furnace 2, a first spark plug 4 for the combustion end of the main gas pipeline 1 is provided in the wind shield 3, an auxiliary ignition mechanism 5 is provided on the main gas pipeline 1, the auxiliary ignition mechanism 5 includes an air regulating rotary cover 6, a combustion box 7, an auxiliary gas pipeline 8 and a second spark plug 9, the combustion box 7 is located on the outer wall of the roasting furnace 2 and covers the outer end of the wind shield 3, and the air regulating rotary cover 6 is rotatably mounted on the wind shield 3 On the outer end, the auxiliary gas pipeline 8 is sealed and installed on the combustion box 7, and the combustion end of the auxiliary gas pipeline 8 is located in the combustion box 7. The second spark plug 9 is located in the auxiliary gas pipeline 8, and one end of the second spark plug 9 extends out of the combustion end of the auxiliary gas pipeline 8. The second spark plug 9 is used for igniting the combustion end of the auxiliary gas pipeline 8; a three-way pipe is provided at the air inlet end of the auxiliary gas pipeline 8, and one end of the second spark plug 9 is installed at the tail end of the second spark plug 9; a plurality of corresponding through holes 10 are provided between the air regulating rotary cover 6 and the wind shield 3.

[0036] The working process of the present invention is as follows: before ignition, the auxiliary ignition mechanism 5 does not ignite, the air regulating rotary cover 6 and the main gas pipeline 1 are opened to ensure that there is enough air and gas in the wind shield 3, and then the first spark plug 4 is energized to try to ignite. After multiple attempts (a reasonable number of times can be set according to requirements) have failed to ignite, the first spark plug 4 is stopped, the air regulating rotary cover 6 is rotated to reduce or close the through hole 10, the auxiliary gas pipeline 8 is opened, at least to ensure that the pressure difference between the combustion box 7 and the roasting furnace 2 is close to or consistent (preferably slightly exceeding the external air pressure), then the second spark plug 9 is energized to try to ignite, and after the air outlet of the auxiliary gas pipeline 8 is ignited, the air supply and gas supply to the combustion box 7 are reduced (the pressure of the combustion box 7 gradually decreases), and then the air regulating rotary cover 6 is rotated to open the through hole 10 The air and gas in the roasting furnace 2 (mainly in the wind shield 3) are sucked into the combustion box 7 through negative pressure to ensure that the pressure difference between the combustion box 7 and the roasting furnace 2 is close (slightly lower than the external air pressure). This is mainly to discharge the air and gas introduced into the roasting furnace 2 when the first spark plug 4 ignites for the first time. Finally, by increasing the gas supply or air supply or the combined supply of the auxiliary gas pipeline 8, the pressure of the combustion box 7 exceeds the pressure of the roasting furnace 2, and even exceeds the external air pressure. Then, the air outlet of the auxiliary gas pipeline 8 will produce a flame-spraying effect, enter the wind shield 3 through the through hole 10, and ignite the main gas pipeline 1; or under the action of the negative pressure of the roasting furnace 2 (the pressure of the combustion box 7 is not required to exceed the external air pressure), the flame in the combustion box 7 can be sucked into the wind shield 3 to ignite the main gas pipeline 1.

[0037] The ignition device ignites and burns through the cooperation of the auxiliary ignition device and the original ignition device of the roaster. The auxiliary ignition device is located outside the roaster to prevent the roaster flue gas from "sticking" the electronic spark, ensuring that its own ignition process is not affected by substances such as coal tar in the roasting flue gas. At the same time, it can ignite the affected original ignition device of the roaster to ensure the stability and success rate of the roaster ignition process.

[0038] In addition, the second spark plug 9 is installed on the auxiliary gas pipeline 8 through a three-way pipe, firstly to ensure the accuracy of ignition, and secondly to facilitate the replacement of the second spark plug 9.

[0039] Preferably, the gas inlet end of the main gas pipeline 1 is connected to the variable gas pipe 11 and the quantitative gas pipe 12 .

[0040] The variable gas pipe 11 is used to control the gas volume of the main gas pipeline 1 and adjust the pressure or flame size in the roasting furnace 2;

[0041] The quantitative gas pipe 12 is used to stably provide the gas volume, ensuring that when the roasting furnace is refueled, the variable gas pipe 11 is closed and the quantitative gas pipe 12 is used to ensure that the main gas pipeline 1 burns with a small flame.

[0042] Preferably, the auxiliary gas pipeline 8 , the variable gas supply pipe and the quantitative gas supply pipe are all installed with a flow control valve 13 and a manual valve 18 .

[0043] Manual and automatic combined control ensures safety.

[0044] Preferably, an air supply pipe 14 is installed on the air inlet of the combustion box 7.

[0045] Preferably, pressure gauges 15 are installed on both the roasting furnace 2 and the combustion box 7 .

[0046] Used to monitor the pressure changes of the roasting furnace 2 and the combustion box 7.

[0047] Preferably, the air regulating rotary cover 6 is provided with an extension rod 16 , the extension rod 16 is slidably connected to a push rod 17 , and the push rod 17 is slidably installed in the combustion box 7 .

[0048] When the push rod 17 is pressed down, the push rod 17 can rotate the air regulating rotary cover 6 by pushing the extension rod 16 to control the opening and closing and size of the through hole 10.

[0049] A roasting furnace ignition method includes an ignition device, and the ignition method comprises the following steps:

[0050] S1. The gas supply pipe and the through hole are both opened, and then the main gas pipeline releases gas. The first spark plug attempts to ignite. After multiple unsuccessful attempts, the main gas pipeline is closed.

[0051] S2, the auxiliary gas pipeline provides gas to the combustion box, the gas supply pipe provides a certain amount of air to the combustion box, and then the second spark plug ignites;

[0052] S3. The second spark plug ignites successfully, and the air supply to the combustion box is gradually reduced. At this time, the air regulating cover is rotated to open the through hole. The air and gas in the roaster are sucked into the combustion box through negative pressure to ensure that the pressure of the combustion box and the roaster are close.

[0053] S4. When the flame at the combustion end of the auxiliary gas pipeline becomes weak, increase the gas flow in the auxiliary gas pipeline and the air supply to the combustion box at the same time, and release the gas from the main gas pipeline to ensure that the gas pressure in the combustion box is greater than the gas pressure in the roasting furnace;

[0054] S5. The combustion end of the main gas pipeline is ignited, reducing the gas volume of the auxiliary gas pipeline and increasing the air supply to the combustion box.

[0055] On the basis of the above-mentioned ignition device, this method is used to control the coordinated work of the auxiliary ignition mechanism 5 and the original ignition device of the roasting furnace under the control of the PLC controller. Before ignition, the auxiliary ignition mechanism 5 does not participate in the ignition, but its air supply pipe 14 and the air regulating rotary cover 6 must be opened together with the main gas pipeline 1 to ensure that the wind shield 3 has enough air and gas. Then the first spark plug 4 is energized to try to ignite. A reasonable number of ignitions can be set on the PLC controller according to requirements. After multiple attempts have failed to ignite, the operation of the first spark plug 4 is stopped; the air regulating rotary cover 6 is rotated to reduce or close the through hole 10, and the auxiliary gas pipeline 8 is opened to at least ensure that the pressure difference between the combustion box 7 and the roasting furnace 2 is close to or consistent (preferably slightly exceeding the external air pressure). Then the second spark plug 9 is energized to try to ignite. Under the premise of excluding parts damage and device failure, ignition can generally be successful and is not affected by the roasting flue gas. After the outlet of the auxiliary gas pipeline 8 is ignited, the auxiliary gas pipeline 8 is opened. The air supply and gas supply to the combustion box 7 are reduced (the pressure of the combustion box 7 gradually decreases). At this time, the air regulating cover 6 is rotated to open the through hole 10, and the air and gas in the roaster 2 (mainly in the wind shield 3) are sucked into the combustion box 7 through the negative pressure to ensure that the pressure difference between the combustion box 7 and the roaster 2 is close (slightly lower than the external air pressure). This is mainly to discharge the air and gas introduced into the roaster 2 when the first spark plug 4 ignites for the first time. Finally, by increasing the gas supply or air supply or both supply amounts of the auxiliary gas pipeline 8, the pressure of the combustion box 7 exceeds the pressure of the roaster 2, or even exceeds the external air pressure, then the air outlet of the auxiliary gas pipeline 8 will produce a flame-spraying effect, enter the wind shield 3 through the through hole 10 and ignite the main gas pipeline 1; or under the action of the negative pressure of the roaster 2 (the pressure of the combustion box 7 is not required to exceed the external air pressure), the flame in the combustion box 7 can be sucked into the wind shield 3 to ignite the main gas pipeline 1.

[0056] The roasting furnace uses an ignition method to coordinate and control the operation of an auxiliary ignition device and the original ignition device of the roasting furnace. When the original ignition device cannot ignite smoothly, the auxiliary ignition device intervenes to control the negative pressure difference between the auxiliary ignition device and the original ignition device, ensuring that the external flame enters the roasting furnace through the through hole and ignites the original ignition device. The ignition process can be achieved by controlling a small negative pressure difference, which is simple and safe.

[0057] Preferably, in S4, the flame strength identification at the combustion end of the auxiliary gas pipeline uses a furnace flame television monitoring system in the prior art for ignition and combustion monitoring.

[0058] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An ignition device for a roasting furnace, comprising a main gas pipeline (1), a combustion end of the main gas pipeline (1) being located in a wind shield (3) in a roasting furnace (2), a first spark plug (4) for the combustion end of the main gas pipeline (1) being provided in the wind shield (3), and characterized in that: The main gas pipeline (1) is provided with an auxiliary ignition mechanism (5), the auxiliary ignition mechanism (5) comprising an air regulating rotary cover (6), a combustion box (7), an auxiliary gas pipeline (8) and a second spark plug (9), the combustion box (7) being located on the outer wall of the roasting furnace (2) and covering the outer end of the wind shield (3), the air regulating rotary cover (6) being rotatably mounted on the outer end of the wind shield (3), the auxiliary gas pipeline (8) being sealed and mounted on the combustion box (7), and the combustion end of the auxiliary gas pipeline (8) being located in the combustion box (7), the second spark plug (9) being located in the auxiliary gas pipeline (8), and one end of the second spark plug (9) extending out of the combustion end of the auxiliary gas pipeline (8), and the second spark plug (9) being used for igniting the combustion end of the auxiliary gas pipeline (8); wherein, The air inlet end of the auxiliary gas pipeline (8) is provided with a three-way pipe, and the tail end of the second spark plug (9) is installed with one end of the three-way pipe; A plurality of corresponding through holes (10) are provided between the air regulating rotary cover (6) and the wind shield (3), and an air supply pipe (14) is installed on the air inlet of the combustion box (7); Pressure gauges (15) are installed on both the roasting furnace (2) and the combustion box (7).

2. The ignition device for a roasting furnace according to claim 1, characterized in that: The gas inlet end of the main gas pipeline (1) is in communication with the variable gas pipe (11) and the quantitative gas pipe (12).

3. The ignition device for a roasting furnace according to claim 2, characterized in that: The auxiliary gas pipeline (8), the variable gas supply pipe and the quantitative gas supply pipe are all installed with a flow control valve (13) and a manual valve (18).

4. The ignition device for a roasting furnace according to claim 1, characterized in that: The air regulating rotary cover (6) is provided with an extension rod (16), the extension rod (16) is slidably connected to a push rod (17), and the push rod (17) is slidably installed in the combustion box (7).

5. A roasting furnace ignition method, characterized in that: The ignition device for a roasting furnace according to any one of claims 1 to 4 is provided, wherein the ignition method comprises the following steps: S1. The gas supply pipe and the through hole are both opened, and then the main gas pipeline releases gas. The first spark plug attempts to ignite. After multiple unsuccessful attempts, the main gas pipeline is closed. S2. Rotate the air regulating cap to reduce the pressure or close the through hole. The auxiliary gas pipeline supplies gas to the combustion box, and the gas supply pipe supplies a certain amount of air to the combustion box. Then the second spark plug ignites. S3. The second spark plug ignites successfully, and the air supply to the combustion box is gradually reduced. At this time, the air regulating cover is rotated to open the through hole. The air and gas in the roaster are sucked into the combustion box through negative pressure to ensure that the pressure of the combustion box and the roaster are close. S4. When the flame at the combustion end of the auxiliary gas pipeline becomes weak, increase the gas flow in the auxiliary gas pipeline and the air supply to the combustion box at the same time, and release the gas from the main gas pipeline to ensure that the gas pressure in the combustion box is greater than the gas pressure in the roasting furnace; S5. The combustion end of the main gas pipeline is ignited, reducing the gas volume of the auxiliary gas pipeline and increasing the air supply to the combustion box.

6. The ignition method for a roasting furnace according to claim 5, characterized in that: In the above-mentioned S4, the flame intensity at the combustion end of the auxiliary gas pipeline is identified by a furnace flame television monitoring system.

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