Burning gun replacement method and burning gun replacement device under thermal state condition of kiln

Abstract

The invention relates to the technical field of glass manufacturing, and discloses a burning gun replacement method and a burning gun replacement device under the hot state condition of a kiln. The method for replacing the burning gun under the hot state condition of the kiln comprises the following steps: taking down an old burning gun from a mounting hole of the kiln under the hot state condition; the new burning gun is preheated through a preset technology; and a new preheated burning gun is mounted in the mounting hole. According to the method for replacing the burning gun under the hot state of the kiln, the burner block of the burning gun and the brick structure of the kiln can be prevented from being damaged, so that the production progress of glass is guaranteed, and the production cost of the glass is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of glass manufacturing, and in particular to a method and a device for replacing a burner gun in a hot kiln. Background Art

[0002] In the field of substrate glass and carrier glass production, the kiln is a high-temperature equipment that melts evenly mixed glass raw materials from solid to liquid through high-temperature heating convection.

[0003] Pure oxygen combustion is a common method for heating the space above the glass liquid level in the kiln. It has a high combustion calorific value and the exhaust gas has little impact on the environment. The burner is the component that performs pure oxygen combustion. Usually, Figure 1 As shown, the kiln is provided with a mounting hole, and the burner is inserted into the mounting hole. The burner includes a base and a burner brick installed on the base. The temperature of the space above the glass liquid in the kiln is usually higher than 1500 degrees. The burner brick runs at high temperature for a long time, and there is local ablation or deformation of the combustion channel. The above situation will cause the flame length or flame direction of the burner to change, affecting the combustion efficiency of the burner, causing interference with the temperature distribution of the kiln space, and seriously affecting the quality of the glass. Therefore, the burner needs to be replaced in time according to the actual state of the burner. In order to ensure the overall production efficiency, the burner is usually replaced in a hot state (the kiln is in a high temperature state). However, the temperature difference between the new burner and the brick structure around the mounting hole is large, which not only easily causes the brick structure to produce expansion and contraction cracks or collapse and fall off, but also may cause damage to the burner brick. The burner brick of the burner is a customized product, which is expensive and has a long delivery cycle, which will affect the overall production progress of the glass and increase the manufacturing cost of the glass.

[0004] Therefore, there is an urgent need for a burner replacement method and burner replacement device in a hot kiln state to solve the above problems. Summary of the invention

[0005] One object of the present invention is to provide a method for replacing a burner gun when the kiln is hot, which can avoid damage to the burner bricks of the burner gun and the brick structure of the kiln, thereby ensuring the production progress of glass and reducing the production cost of glass.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] The method of replacing the burner gun when the kiln is hot includes:

[0008] Remove the old lance from the mounting hole of the hot kiln;

[0009] Preheating the new burner with a preset process;

[0010] Install the preheated new burner into the mounting hole.

[0011] As an optional solution, the preset process includes:

[0012] In the first heating stage, the new burner is heated at a first heating rate until the temperature of the burner brick of the new burner reaches a first preset temperature;

[0013] In the second heating stage, the new burner is heated at a second heating rate until the burner brick reaches a second preset temperature, and the second heating rate is greater than the first heating rate.

[0014] As an optional solution, in the first heating stage, gas is supplied to the burner at a preset flow rate and a new burner is ignited;

[0015] In the second heating stage, the new burner is kept burning under the gas condition of the preset flow rate, and a flame reflection cover is provided at one end of the fire outlet of the burner brick.

[0016] As an optional solution, the preset flow rate is the lower limit of the flow rate for normal use of the new burner.

[0017] As an optional solution, the first preset temperature is 220° C.-260° C.; and / or

[0018] The second preset temperature is 950°C-1000°C.

[0019] As an optional solution, after the old burner is taken out from the mounting hole, the mounting hole is sealed with a heat-insulating plate, and before the new burner is installed into the mounting hole, the heat-insulating plate is removed.

[0020] Another object of the present invention is to provide a burner replacement device, which executes the burner replacement method when the kiln is hot, which is not only easy to operate, but also can avoid damage to the burner bricks of the burner and the brick structure of the kiln.

[0021] To achieve this object, the present invention adopts the following technical solutions:

[0022] A burner gun replacement device for executing the burner gun replacement method in a hot kiln state, comprising:

[0023] The frame is movable;

[0024] A support member is arranged on the frame, and a U-shaped support portion is arranged at the upper end of the support member;

[0025] A support platform connected to the support member, wherein the support platform is configured to support the burner;

[0026] A sliding rod is overlapped in the U-shaped support portion and can slide and rotate relative to the U-shaped support portion. One end of the sliding rod is connected to a rope for fixing the burning gun, and the other end is used for operation by an operator.

[0027] As an optional solution, the burner replacement device also includes a flame reflection cover, the support platform includes a main body and a sinking part, the sinking part is arranged at one end of the main body away from the support member, the upper surface of the sinking part is lower than the upper surface of the main body, the main body is configured to support the burner, and the sinking part is configured to support the flame reflection cover.

[0028] As an optional solution, the height of the support platform relative to the frame is adjustable.

[0029] As an optional solution, the burner replacement device also includes a counterweight, and the counterweight is configured to be placed on the frame.

[0030] The beneficial effects of the present invention are:

[0031] The method for replacing the burner gun in the hot state of the kiln in this embodiment is as follows:

[0032] (1) By heating the new burner before installing it into the hot kiln, it is possible to avoid a large temperature difference between the burner brick of the new burner and the brick structure around the kiln installation hole, thereby preventing the brick structure in a high temperature state from cracking or causing expansion and contraction cracks, and avoiding damage to the burner brick, thereby ensuring the production progress of the glass and reducing the production cost of the glass.

[0033] (2) By first heating the burner brick to a first preset temperature at a lower heating rate and then heating the burner brick to a second preset temperature at a higher heating rate, the temperature rise rate of the burner brick is matched with its own thermal expansion coefficient at the corresponding temperature, ensuring that the entire preheating process of the burner brick is relatively smooth and stable, thereby avoiding damage to the burner brick during the preheating process.

[0034] (3) The entire preheating process of the burner is completed by the combustion of the gas supplied to it, and no additional heating mechanism is required, which is easy to operate. In addition, by setting a flame reflection cover on the burner brick in the second heating stage, the flame reflected by the flame reflection cover can heat the burner brick, thereby improving the heating rate in the second heating stage. The gas supply flow rate does not need to be changed during the entire preheating process, which is not only simple to operate, but also energy-saving.

[0035] (4) After the old burner is removed from the mounting hole, the mounting hole is sealed with an insulation board, which not only reduces heat damage in the kiln but also prevents external impurities from entering the kiln.

[0036] The burner gun replacement device of the present invention, when executing the burner gun replacement method under the hot state of the kiln, preheats the burner gun first, thereby avoiding damage to the burner gun and the brick structure due to excessive temperature difference; when the burner gun is taken out from the mounting hole, the part of the burner gun extending out of the mounting hole has a downward movement tendency under the action of gravity, and the lever mechanism formed by the sliding rod and the support member allows the rope to provide not only horizontal pulling force but also upward pulling force to the burner gun. The upward pulling force can balance the downward movement tendency of the burner gun, ensuring that the final moving direction of the burner gun is parallel to the mounting hole, thereby avoiding damage to the burner gun and the brick structure due to the deviation of the moving direction of the burner gun. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] Figure 1 It is a schematic diagram of the structure with a burning gun installed on the kiln;

[0038] Figure 2 It is a schematic diagram of taking out an old burner from a mounting hole of a kiln using a burner replacement device provided by a specific embodiment of the present invention;

[0039] Figure 3 It is a schematic diagram of installing a heat preservation board in a mounting hole provided by a specific embodiment of the present invention;

[0040] Figure 4 It is a schematic diagram of preheating a new burner on a burner replacement device provided by a specific embodiment of the present invention;

[0041] Figure 5 It is a schematic diagram of installing a new burner into a mounting hole provided by a specific embodiment of the present invention.

[0042] In the figure:

[0043] 100, kiln; 101, mounting hole; 102, brick structure;

[0044] 200, burner gun; 201, base; 202, burner brick; 203, air pipe;

[0045] 300. Burner gun replacement device; 10. Frame; 11. Universal movable wheel; 20. Support member; 21. U-shaped support part; 22. Rod body; 30. Sliding rod; 40. Support platform; 41. Main body; 42. Sinking part; 50. Rope; 60. Flame reflection cover; 70. Counterweight; 80. Positioning block; 90. Insulation board. DETAILED DESCRIPTION

[0046] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0047] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0048] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0049] In the description of this embodiment, the terms "upper", "lower", "right", etc., directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0050] This embodiment relates to a method and device for replacing a burner on a hot kiln, such as Figure 1 As shown, the kiln 100 is provided with a containing space, and the space is used to contain the prepared glass raw materials. A mounting hole 101 is provided on the side wall of the kiln 100, and the burner 200 is installed at the mounting hole 101, and is used to perform pure oxygen combustion above the glass raw materials. Specifically, the kiln 100 is provided with a brick structure 102 around the mounting hole 101. The burner 200 includes a base 201, a burner brick 202 and an air pipe 203, and the burner brick 202 and the air pipe 203 are respectively connected to both sides of the base 201, one end of the air pipe 203 is connected to the burner brick 202, and the other end is connected to an external gas supply device. When the burner 200 is installed in the mounting hole 101, the burner brick 202 is inserted into the mounting hole 101, and the end of the burner brick 202 away from the base 201 is the fire outlet of the burner 200. Under high temperature conditions, the brick structure 102 and the burner brick 202 are both in a relatively soft state.

[0051] like Figure 2-Figure 5 As shown, this embodiment provides a method for replacing a burner gun when a kiln is in a hot state, comprising:

[0052] Step 10, removing the old burning gun 200 from the mounting hole 101 of the hot kiln 100;

[0053] Step 20, preheating the new burner 200 using a preset process;

[0054] Step 30 , installing the preheated new burner 200 into the mounting hole 101 .

[0055] The burner gun replacement method in the hot kiln of this embodiment can avoid excessive temperature difference between the burner brick 202 of the new burner gun 200 and the brick structure 102 around the installation hole 101 of the kiln 100 by heating the burner gun 200 before installing the new burner gun 200 into the hot kiln 100, thereby avoiding the brick structure 102 in the high temperature state from cracking or causing expansion and contraction cracks, avoiding damage to the burner brick 202, and ensuring the production progress of the glass and reducing the production cost of the glass.

[0056] like Figure 2 and Figure 3 As shown, after the old burner 200 is removed from the mounting hole 101 in step 10, the mounting hole 101 is blocked with an insulation board 90. This can not only reduce heat damage in the kiln 100, but also prevent external impurities from entering the kiln 100. It is understandable that the insulation board 90 is made of high temperature resistant material to prevent the temperature of the kiln 100 from causing deformation or damage to the insulation board 90. In this embodiment, the main material of the insulation board 90 is alumina. Specifically, the insulation board 90 includes one or more layers of plate material and is wrapped with an alumina ribbon. Compared with the existing insulation board 90 made of refractory wool, the alumina ribbon has no dust emission, which ensures the cleanliness of the kiln 100 and the health of personnel. Optionally, the thickness of the alumina ribbon can be 0.3-0.6mm and the width can be 50-100mm.

[0057] Preferably, the preset process of preheating the burner 200 includes a first heating stage and a second heating stage performed in sequence, wherein: the first heating stage heats the new burner 200 at a first heating rate until the temperature of the burner brick 202 reaches the first preset temperature. The second heating stage heats the new burner 200 at a second heating rate until the burner brick 202 reaches the second preset temperature, and the second heating rate is greater than the first heating rate. By first heating the burner brick 202 to the first preset temperature at a lower heating rate and then heating the burner brick 202 to the second preset temperature at a higher heating rate, the temperature rise rate of the burner brick 202 matches its own thermal expansion coefficient at the corresponding temperature, ensuring that the entire preheating process of the burner brick 202 is relatively smooth and stable, thereby avoiding damage to the burner brick 202 during the preheating process.

[0058] Specifically, Figure 4 As shown, in the first heating stage, gas is supplied to the burner 200 at a preset flow rate and the new burner 200 is ignited. In the second heating stage, the new burner 200 is kept burning under the gas condition of the preset flow rate, and a flame reflection cover 60 is provided at one end of the fire outlet of the burner brick 202 (i.e., the end of the burner brick 202 away from the base 201). In this embodiment, the entire preheating process of the burner 200 is completed by the combustion of the gas supplied to it, and no additional heating mechanism is required, which is easy to operate. In addition, by providing a flame reflection cover 60 at the burner brick 202 in the second heating stage, the flame reflected by the flame reflection cover 60 can heat the burner brick 202 ( Figure 4 The middle dotted arrow indicates the flow direction of the flame reflected by the flame reflection cover 60), which realizes the improvement of the heating rate in the second heating stage. The gas supply flow rate does not need to be changed during the entire preheating process, which is not only simple to operate but also saves energy.

[0059] In this embodiment, the preset flow rate is the lower limit of the flow rate for normal use of the new burner 200. This setting ensures that the temperature rise of the burner 200 during the entire preheating process is relatively gentle, avoiding damage to the burner brick 202. Specifically, the preset flow rate of the gas can be 5-10 cubic meters per hour.

[0060] Optionally, during the preheating process, the first preset temperature is 220° C.-260° C., and the second preset temperature is 950° C.-1000° C. The temperature of the burner brick 202 can be detected by an infrared temperature detection tool.

[0061] The present invention also provides a burner gun replacement device for executing the burner gun replacement method in the hot state of the kiln, which is not only easy to operate, but also can avoid damage to the burner bricks 202 and brick structure 102 in a high-temperature soft state.

[0062] Specifically, Figure 2 and Figure 4 As shown, the burner gun replacement device includes a frame 10, a support member 20, a support platform 40, a sliding rod 30 and a rope 50. Among them, the support member 20 is arranged on the frame 10, and a U-shaped support portion 21 is arranged at the upper end of the support member 20. The support platform 40 is connected to the support member 20, and the support platform 40 is used to support the burner gun 200. The frame 10 can move, so that it is convenient for the support platform 40 to approach the kiln 100 and receive the old burner gun 200, and it is also convenient to send the new burner gun 200 to the vicinity of the installation hole 101 for installation. The sliding rod 30 is overlapped in the U-shaped support portion 21, and can slide and rotate relative to the U-shaped support portion 21. One end of the sliding rod 30 is connected to the rope 50 for fixing the burner gun 200, and the other end is used for the operator to operate. In fact, the sliding rod 30 and the support member 20 form a lever mechanism, and the lever structure is used to realize the taking and placing of the burner gun 200.

[0063] like Figure 2 As shown, when the burner 200 is taken out of the mounting hole 101 by using the burner replacement device, the rope 50 is first connected and fixed to the base 201 of the burner 200; then the operator presses the end of the sliding rod 30 away from the burner 200 and pulls the sliding rod 30 outward, thereby gradually pulling the burner 200 out of the mounting hole 101. Since the portion of the burner 200 extending out of the mounting hole 101 has a downward movement tendency under the action of gravity, the lever structure enables the rope 50 to provide not only a horizontal pulling force to the burner 200, but also an upward pulling force to the burner 200. The upward pulling force can balance the downward movement tendency of the burner 200, ensuring that the final moving direction of the burner 200 is parallel to the mounting hole 101, thereby avoiding damage to the soft burner brick 202 and the brick structure 102 due to the deviation of the moving direction of the burner 200; finally, the burner 200 is finally supported on the support platform 40 under the traction of the rope 50.

[0064] In this embodiment, the frame 10 includes a plurality of universal movable wheels 11, so that the movement of the frame 10 is more flexible. It can be understood that the universal movable wheels 11 have a self-locking function. When the frame 10 moves to a specified position, the universal movable wheels 11 are self-locking to prevent the frame 10 from moving at will. The burner replacement device also includes a counterweight 70, which is used to be placed on the frame 10. The setting of the counterweight 70 can prevent the frame 10 from overturning due to excessive force on one side. The number of specific counterweights 70 and the specific position of the counterweights 70 placed on the frame 10 can be flexibly adjusted as needed, and no specific limitation is made here.

[0065] like Figure 4 As shown, the preheating of the new burner 200 is also completed on the burner replacement device. Specifically, the burner replacement device also includes a flame reflection cover 60. The support platform 40 includes a main body 41 and a sinking part 42. The sinking part 42 is arranged at one end of the main body 41 away from the support member 20. The upper surface of the sinking part 42 is lower than the upper surface of the main body 41. The main body 41 is configured to support the burner 200, and the sinking part 42 is configured to support the flame reflection cover 60. When preheating the burner 200, first place the burner 200 on the main body 41, and make the end of the burner brick 202 protrude from the main body 41, that is, the burner brick 202 is partially suspended above the sinking part 42. After the burner is ignited and the burner brick 202 is heated to the first preset temperature, the flame reflection cover 60 is placed on the sinking part 42 to ensure that the flame reflection cover 60 is covered at the end of the burner 200. The flame reflection cover 60 reflects the flame onto the burner brick 202, so that the burner 200 is heated at the second heating rate.

[0066] like Figure 4As shown, in this embodiment, the flame reflection cover 60 is roughly a rectangular shell with an opening on one side, which has a simple structure and is easy to manufacture. In other embodiments, the specific shape of the flame reflection cover 60 is not limited. Optionally, the material of the reflection cover can be high-temperature resistant stainless steel. Optionally, the entire support platform 40 can use a frame structure, which can not only reliably support the burner 200, but also facilitate the flame reflected by the flame reflection cover 60 to contact the lower surface of the burner brick 202, ensuring that the burner brick 202 has a uniform temperature rise in the second heating stage. Optionally, the burner replacement device also includes a positioning block 80, which is installed on the main body 41. When the new burner 200 is placed on the main body 41, the burner 200 can be limited to ensure that the burner 200 is properly positioned on the support platform 40 when preheating.

[0067] like Figure 5 As shown, when the preheated burner 200 is installed on the kiln 100, the burner 200 is first pushed to the mounting hole 101 through the frame 10 to ensure that the axis of the burner 200 is opposite to the axis of the mounting hole 101; then the rope 50 is connected to the base 201 of the burner 200; then the insulation board 90 is removed from the kiln 100; then an operator presses one end of the sliding rod 30 to make the rope 50 produce an upward pulling force on the burner 200, and another operator pushes the burner 200 in the horizontal direction through a tool, thereby pushing the burner 200 into the mounting hole 101.

[0068] When the burner 200 is pushed into the installation hole 101, the upward pulling force exerted by the rope 50 on the burner 200 can balance a certain gravity of the burner 200, thereby reducing the friction between the burner 200 and the supporting platform 40 and the side wall of the installation hole 101, thereby avoiding damage to the high-temperature softened brick structure 102 and the burner 200 nozzle.

[0069] In this embodiment, the height of the support platform 40 relative to the vehicle frame 10 is adjustable, so that the height of the burner 200 on the support platform 40 relative to the kiln 100 is adjustable, thereby ensuring that the axis of the new burner 200 can be collinear with the axis of the mounting hole 101. Optionally, the support member 20 also includes a rod body 22, the U-shaped support portion 21 is connected to the top of the rod body 22, the support platform 40 is installed at a position close to the upper end of the rod body 22, and the rod body 22 is a telescopic rod. When the length of the telescopic rod is adjusted, the height of the support platform 40 relative to the vehicle frame 10 is adjusted. In other embodiments, the support platform 40 can also be directly set to be adjustable in height relative to the support member 20, which is not specifically limited here.

[0070] Obviously, the above embodiments of the present invention are only examples for clearly explaining the present invention, and are not intended to limit the implementation of the present invention. For those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation and application scope, and the content of this specification should not be understood as limiting the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A method for replacing a burner gun when the kiln is hot, characterized in that: include: Remove the old burner (200) from the mounting hole (101) of the hot kiln (100); Preheating the new burner (200) using a preset process; The preheated new burner (200) is installed into the installation hole (101).

2. The method for replacing the burner gun in a hot kiln according to claim 1, characterized in that: The preset process includes: In a first heating stage, the new burner (200) is heated at a first heating rate until the temperature of the burner brick (202) of the new burner (200) reaches a first preset temperature; In the second heating stage, the new burner (200) is heated at a second heating rate until the burner brick (202) reaches a second preset temperature, and the second heating rate is greater than the first heating rate.

3. The method for replacing the burner gun in a hot kiln according to claim 2, characterized in that: In the first heating stage, gas is supplied to the burner (200) at a preset flow rate and a new burner (200) is ignited; In the second heating stage, the new burner (200) is kept burning under the preset gas flow rate condition, and a flame reflection cover (60) is provided at one end of the fire outlet of the burner brick (202).

4. The method for replacing the burner gun in a hot kiln according to claim 3, characterized in that: The preset flow rate is the lower limit value of the flow rate for normal use of the new burner (200).

5. The method for replacing the burner gun in a hot kiln according to claim 3, characterized in that: The first preset temperature is 220°C-260°C; and / or The second preset temperature is 950°C-1000°C.

6. The method for replacing the burner gun in a hot kiln according to any one of claims 1 to 5, characterized in that: After the old burner (200) is removed from the mounting hole (101), the mounting hole (101) is sealed with a heat preservation plate (90); before the new burner (200) is installed in the mounting hole (101), the heat preservation plate (90) is removed.

7. A burner gun replacement device, used to implement the burner gun replacement method in a hot kiln state as described in any one of claims 1 to 6, characterized in that: include: A vehicle frame (10) capable of moving; A support member (20) is arranged on the vehicle frame (10), and a U-shaped support portion (21) is arranged at the upper end of the support member (20); A support platform (40) connected to the support member (20), the support platform (40) being configured to support the burner (200); A sliding rod (30) is overlapped in the U-shaped support portion (21) and can slide and rotate relative to the U-shaped support portion (21). One end of the sliding rod (30) is connected to a rope (50) for fixing the burning gun (200), and the other end is used for operation by an operator.

8. The burner replacement device according to claim 7, characterized in that: The burner replacement device also includes a flame reflection cover (60), the support platform (40) includes a main body (41) and a sinking part (42), the sinking part (42) is arranged at one end of the main body (41) away from the support member (20), the upper surface of the sinking part (42) is lower than the upper surface of the main body (41), the main body (41) is configured to support the burner (200), and the sinking part (42) is configured to support the flame reflection cover (60).

9. The burner replacement device according to claim 7, characterized in that: The height of the support platform (40) relative to the vehicle frame (10) is adjustable.

10. The burner replacement device according to claim 7, characterized in that: The burner replacement device further comprises a counterweight (70), and the counterweight (70) is configured to be placed on the vehicle frame (10).

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