JP2004160523A - Device and method for heating vessel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain the improvement of heating efficiency, the drastic reduction of a facility cost and the improvement of working surrounding, when the inner part of a vessel, such as a ladle, is heated. <P>SOLUTION: The heating device and the heating method for vessel are provided, with which a plate 2 fitted to the circumference of the tip end part 1a of a combustion machine 1 is covered to the opening portion of the vessel 3 so that a guide 2a arranged on the plate 2 enters into the vessel 3, and the air for exhausting the combustion gas, is supplied and fuel supplied to the tip end part 1a of the combustion machine 1, and the combustion gas generated with a flame 8 from the tip end part 1a of the combustion machine 1 is shifted with the air along a guide 3a and so, the combustion gas reacted to the bottom surface of the vessel 3 is heated to the bottom surface and also, the inner wall part 3d of the vessel 3 is heated, too, and the combustion gas is exhausted from a gas exhausting outlet 3b. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention uses a combustion heat of a packaged combustor (burner) to heat a container such as a ladle, thereby heating a container such as a ladle for temporarily receiving metal melted in a blast furnace or the like. The present invention relates to an apparatus and a heating method.
[0002]
[Prior art]
A container 100 such as a ladle shown in FIG. 8 is generally used for transporting hot metal or the like taken out of a blast furnace or the like to a converter or for ingot making of molten steel taken out of a converter or the like in a casting facility. It is used to transport to molds and the like. Therefore, the inside of the container 100 such as a ladle is heated to the melting temperature of the metal before the molten metal is put in the container 100 such as a ladle so as not to cause thermal distortion due to the high temperature of the molten metal. It is necessary to raise the temperature.
[0003]
As a technique related to a technique of preheating the inside of a container such as a ladle, as shown in FIG. 9, a partition 410 is fitted in an inverted truncated cone-shaped container 400, and a single burner 420 is used to attach the bottom of the second chamber 400 b. A configuration is disclosed in which only the first chamber 400a is heated to increase the temperature of the first chamber 400a by heat conduction (see Patent Document 1).
[0004]
[Patent Document 1]
JP-A-11-758 (paragraph number 0009 (action) description, FIG. 4)
[0005]
[Problems to be solved by the invention]
However, in the configuration shown in FIG. 9, the container 400 such as a ladle needs to have an inverted truncated cone shape, and can be applied only to the container 400 such as a ladle used for a special use. In addition, the partition 410 must be fitted into a container 400 such as a ladle, which may complicate the step of preheating the container such as a ladle.
[0006]
Conventionally, when a container 100 such as a ladle having a diameter of about 1 m and a depth of about 1 m is generally heated, gas flows out from the tip of a single pipe-shaped burner as shown in FIG. Then, it is ignited by a pilot flame, a single pipe-shaped burner tip 200 is guided into a container 100 such as a ladle, and fuel is ejected from the pipe-shaped burner tip 200 to thereby burn the tip of the burner. A flame 300 was formed from the part 200 to heat the inside of the container 100 such as a ladle. In order to raise the temperature by heating the inside of the container 100 such as a ladle, heating by such a so-called diffusion flame has been the mainstream. In this case, since air is entrained and burned by the gas jet energy, it is impossible to seal the container 100 such as a ladle with a lid (plate) during internal heating of the container 100 such as a ladle.
[0007]
The air for burning the fuel is partially sucked into the burner depending on the burning speed at the burner tip 200, or is used for diffusion of the flame from the burner tip 200. Therefore, a high-temperature combustion temperature of 1600 ° C. which is normally obtained depending on the combustion state cannot be obtained, and only a temperature of about 1000 ° C. can be obtained. Therefore, the ultimate temperature required as the maximum temperature must be lowered. Further, conventionally, since the inside of the container 100 such as a ladle is heated without a lid (plate) of the container 100 such as a ladle, air can freely flow from an open portion 100a of the container 100 such as a ladle. Since it was possible to enter and exit, a long time was required until the temperature in the container 100 such as a ladle became uniform.
[0008]
In addition, in order to burn the fuel, it is necessary in principle to let air in and out of the open portion 100a. However, the pipe-shaped burner tip 200 is not provided on the container 100 such as a ladle without a lid (plate). Since it is directly put into the container 100 such as a ladle, the open portion 100a without the lid is large, so that the energy loss from the open portion 100a becomes large and the fuel consumption must be increased. Furthermore, there is heat radiation (heat loss) from the open portion 100a, which causes an increase in the ambient temperature of the container 100 such as a ladle, so that the working environment temperature far exceeds room temperature, and it becomes difficult for the worker to manage health.
[0009]
The present invention has been made in view of the above circumstances, and uses a packaged combustor (burner) to cover a container such as a ladle with a lid to heat the inside of the container such as a ladle, thereby improving the heating efficiency. It is an object of the present invention to provide a heating device and a heating method for a container, which can improve the temperature, equipment cost, and work environment.
[0010]
[Means for Solving the Problems]
In order to achieve the above object, the invention according to claim 1 is characterized in that a tip for discharging the combustion gas in order to deliver the combustion gas into a container, and that the fuel is burned at the tip for the combustion. A blower for supplying air to the tip of the combustor for supplying air to release gas and moving the combustion gas by air; and the fuel supplied to the tip. Adjusting means for supplying or shutting off the fuel, ignition means for igniting the fuel supplied to the tip, and whether air is supplied to the tip by the blower. Monitoring means for detecting and igniting the tip in order to deliver the combustion gas into the container, and controlling supply or cutoff of the fuel to the tip. A combustor comprising a control means for controlling the amount of air necessary for combustion of the fuel, and a combustor mounted around the tip of the combustor and covering an open portion of the container, And a plate for positioning the tip.
[0011]
Therefore, according to the first aspect of the present invention, a tip portion for sending out combustion gas into the combustor, a blower serving as a blower, an electromagnetic shutoff valve serving as a fuel adjusting device, and an ignition transformer serving as an ignition device are provided. And a monitoring device as monitoring means for ensuring the safety of the burner 1 and a control device as control means for controlling the burner 1, which are packaged and separated from the combustor. Equipment costs can be reduced compared to installation, and plates are provided to cover the open parts of the ladle and other containers. It is possible to reduce losses.
[0012]
According to a second aspect of the present invention, in addition to the configuration of the first aspect, the plate is provided with a guide extending around a peripheral portion where the tip portion of the combustor is incorporated. Features.
[0013]
Therefore, according to the second aspect of the present invention, since the guide extending around the peripheral portion into which the tip of the combustor is incorporated is provided, the combustion gas generated from the flame from the tip of the combustor is provided. It can be moved in the direction secured by the guide and can be guided to the bottom surface of a container such as a ladle to prevent a short path phenomenon that diffuses combustion gas.
[0014]
Furthermore, in the invention according to claim 3, in addition to the configuration according to claim 1 or 2, an exhaust outlet for discharging the combustion gas from the container is provided at any part of the container. It is characterized by the following.
[0015]
Therefore, according to the third aspect of the present invention, an exhaust outlet for discharging the combustion gas from the container such as the ladle is provided at any part of the container such as the ladle. The combustion gas guided to the bottom surface of the container is transmitted to the inner wall portion, and after heating the inner wall portion, the combustion gas can be discharged out of the container such as a ladle.
[0016]
According to a fourth aspect of the present invention, in addition to the configuration of the first or second aspect, the plate is provided with an exhaust outlet for exhausting the combustion gas in the container. I do.
[0017]
Therefore, according to the invention as set forth in claim 4, the plate is provided with an exhaust outlet for discharging combustion gas in the container such as a ladle, without being limited to the container such as a ladle. The combustion gas guided to the bottom surface of the container is transmitted to the inner wall portion, and after heating the inner wall portion, the combustion gas can be discharged out of a container such as a ladle.
[0018]
Further, according to the invention described in claim 5, in addition to the configuration according to any one of claims 1 to 4, the blower means and the control means in the combustor are connected to the front end portion of the combustor via a duct. And is connected to
[0019]
Therefore, according to the fifth aspect of the present invention, since the blowing means and the control means in the combustor are connected to the tip of the combustor via the duct, the container such as a ladle and the combustor are separated. Even if it is necessary to install the fuel cell in a place where it has been placed, the combustion gas can be sent to a container such as a ladle.
[0020]
The invention according to claim 6 is characterized in that the guide extending around the periphery of the plate, which is attached to the periphery of the tip of the combustor, into which the tip of the combustor is incorporated is the container. Covering the open portion of the container so as to enter therein, supplying air to burn the fuel at the tip of the combustor and release the combustion gas, and supplying the air to the tip of the combustor. Igniting the fuel, and the combustion gas generated by the flame from the tip of the combustor along with the guide extending around a peripheral portion where the tip of the combustor is incorporated. And heating the bottom surface of the container with the combustion gas that has reached the bottom surface of the container, and also heats the side surface of the container and exhausts the gas through the exhaust outlet. The features.
[0021]
Therefore, according to the invention as set forth in claim 6, the guide extending around the periphery of the plate attached around the tip of the combustor around the tip where the tip of the combustor is incorporated is provided in a container such as a ladle. Cover the open part of the container such as a ladle so that the fuel is burned at the tip of the combustor and air is supplied to release the combustion gas, and the fuel supplied to the tip of the combustor is ignited. The combustion gas generated by the flame from the tip of the combustor is moved by air along a guide extending around the peripheral part where the tip of the combustor is incorporated, and the combustion reaches the bottom of a container such as a ladle. The gas heats the bottom surface and also heats the inner side wall, which is the side surface of the ladle and other containers, and discharges it from the exhaust outlet, eliminating heat radiation from the open portion of the ladle container. And the flow of combustion gas Allows preventing short pass phenomenon that proceeds to the exhaust outlet direction, it is possible to heat the container ladle such a high temperature in a short time.
[0022]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0023]
(Example 1)
1 and 2 show a heating device 5 for heating a container 3 such as a ladle according to Example 1 of the present invention. The burner 1, which is a combustor, includes a burner tip 1a, which is a single tip for sending combustion gas to a container 3 such as a ladle, a blower, which is a blowing means, and an electromagnetic shut-off valve, which is a fuel adjusting means. And an ignition transformer as an ignition means, a monitoring device as a monitoring means for ensuring the safety of the burner 1, and a control device as a control means for controlling the burner 1. The devices other than the tip of the burner 1 are packaged by being incorporated in the burner 1 and are not shown in the drawings.
[0024]
In the blower, air is supplied to burn fuel at a burner tip 1a provided at the end of the burner 1 to release combustion gas, and the combustion gas is moved by air in a container 3 such as a ladle. Then, the air is supplied to the burner tip 1a. In addition, the electromagnetic shutoff valve performs adjustment for supplying and shutting off the fuel supplied to the burner tip 1a. The ignition transformer performs ignition for igniting the fuel supplied to the burner tip 1a. The monitoring device detects whether air is being supplied to the burner tip 1a by the blower and performs monitoring to detect ignition of the burner tip 1a in order to send out combustion gas into the container. Become. Further, the control device controls the supply or cutoff of the fuel to the burner tip 1a and controls the amount of air required for fuel combustion. Further, fuel and air for burning the fuel are sent to the burner tip 1a, and the flame 8 burning the fuel gas is emitted from the burner tip 1a.
[0025]
A burner mounting plate 2, which is a plate, is mounted around the burner tip 1a. The size of the burner mounting plate 2 can cover an opening 3a, which is an open portion of a container 3 such as a ladle. It is the size that can be done. In addition, a guide 2a is provided which extends around the portion where the burner tip 1a is incorporated in the burner mounting plate 2. The opening 3a of the container 3 such as a ladle covered with the burner mounting plate 2 has a predetermined size that allows molten metal to be injected as a hot water inlet. An exhaust outlet 3b for discharging combustion (exhaust) gas is provided on a side surface of any part of the container 3 such as a ladle, and the exhaust outlet 3b also functions as a hot water outlet. .
[0026]
As shown in FIG. 2, when the burner 1 and the burner mounting plate 2 are attached so as to cover an opening 3a which is an open portion of the container 3 such as a ladle, the guide 2a extends to near the bottom surface 3c of the container 3 such as a ladle. Will be. Then, the container 3 such as a ladle is closed by attaching the burner mounting plate 2. The operation of the heating device 5 for heating the above-described container such as a ladle in this state will be described with reference to FIG. First, when the burner 1 is operated, fuel is supplied from the burner 1 to the burner tip 1a. At this time, it is confirmed that the supply gas pressure is normal (step S0), and the operation signal of the operation switch is turned “ON” (step S1). The necessary air is sent from the blower to the burner tip 1a (blowing for about 35 seconds) (step S2). Next, the monitoring device determines whether the pressure of the blower is normal (step S3).
[0027]
If it is determined that the pressure of the blower is not normal, a lockout occurs (step S10), the cause of the abnormal pressure of the blower is investigated, the cause is determined, and the cause is removed (step S11). Then, the switch of the manual reset is pressed (step S12), and the operation signal of the operation switch is turned ON again (step S1).
[0028]
When it is determined that the pressure of the blower is normal, the control device controls to operate the ignition transformer and to operate the electromagnetic shut-off valve to regulate the supply of fuel (step S4). Then, ignition of the burner tip 1a is performed (step S5). Then, it is determined whether or not the detection of the flame 8 is normal (step S6).
[0029]
If it is determined that the detection of the flame 8 is not normal, the ignition is not ignited (step S9), the lock-out is performed (step S10), the cause of the abnormal detection of the flame 8 is determined, and the cause is determined. Is removed (step S11). Then, the switch of the manual reset is pressed (step S12), and the operation signal of the operation switch is turned ON again (step S1).
[0030]
When it is determined that the detection of the flame 8 is normal, the supplied fuel is burned by the flame 8 at the burner tip 1a to generate a combustion gas (step S7). Further, the flame 8 from the burner tip 1a is sent to a predetermined depth of the container 3 such as a ladle along the guide 2a by the control device and the blower. Accordingly, the combustion gas generated by the flame 8 from the burner tip 1a moves in a direction secured by the guide 2a, and the combustion gas heats the bottom surface 3c of the container 3 such as a ladle. At this time, since the flame 8 from the burner tip 1a follows the guide 2a, the combustion gas generated from the flame 8 at the burner tip 1a surely reaches the bottom surface 3c without diffusion. Then, the combustion gas from the flame 8 along the guide 2a heats the portion of the bottom surface 3c facing the guide 2a.
[0031]
By heating a portion of the bottom surface 3c facing the guide 2a, the temperature of that portion increases. Heat is spread over the entire bottom surface 3c by heating the portion by the combustion gas for a predetermined time. As a result, the temperature of the entire bottom surface 3c rises, and the entire bottom surface 3c reaches a high combustion temperature (generally, about 1600 ° C.). Further, as the heating of the burner tip 1a by the combustion gas generated from the flame 8 continues, the combustion gas is transmitted from the bottom surface 3c to the inner wall portion 3d which is the side surface. At the same time, heat from the combustion gas is also transmitted from the bottom surface 3c to the inner wall portion 3d (in the direction of the dotted arrow in FIG. 2). Then, as the heating is further continued, the inner wall portion 3d also reaches the high-temperature combustion temperature (generally, about 1600 ° C.) similarly to the bottom surface 3c. At this time, the combustion gas transmitted from the bottom surface 3c to the inner wall portion 3d is exhausted from the exhaust outlet 3b (in the direction of the solid line arrow in FIG. 2). Then, the operation signal of the operation switch of the heating device 5 is set to "OFF" (step S8).
[0032]
(Example 2)
FIG. 4 shows a heating device 15 for heating a container 3 such as a ladle according to Example 2 of the present invention. The basic configuration is the same as that of the embodiment shown in Example 1, and the same members as in Example 1 are denoted by the same reference numerals as in Example 1. The configuration of Example 2 is that the burner main body (blower and control device) 10 is installed separately from the burner tip 10a. Therefore, a duct 10c is provided between the burner main body (blower and control device) 10 and the burner distal end portion 10a to connect the burner main body (blower and control device) 10 to the burner distal end portion 10a.
[0033]
Specifically, as shown in FIGS. 4 and 5, one end of a duct 10c is connected to the blower and the control device that are the burner body 10, and a T-type duct 10d is connected to the other end of the duct 10c. is there. The T-type duct 10d is provided with a fuel receiving portion 10e for receiving the fuel gas, and the fuel receiving portion 10e is connected to an electromagnetic shut-off valve 10b for shutting off the supply of the fuel gas. A burner tip 10a is attached to the fuel receiving portion 10e. In the present embodiment, the burner tip 10a enters a hole provided at a substantially central portion in the burner mounting plate 2.
[0034]
The burner mounting plate 2 having another configuration is provided with a guide 2a extending around a portion where the burner tip portion 10a is incorporated, and the combustion (exhaust) gas is discharged to the side surface of the container 3 such as a ladle. Is provided with an exhaust outlet 3b for this purpose, which is the same as the configuration of the first embodiment. Then, in order to operate the heating device 15 for heating the container 3 such as a ladle in the assembled state shown in FIG. 5, the opening 3a of the container 3 such as a ladle is covered with a plate (burner mounting plate 2). By heating the bottom 3c and the inner wall 3d with the combustion gas, the container 3 such as a ladle can be heated to a high temperature in a short time as in Example 1.
[0035]
In Examples 1 and 2 of the present embodiment, the exhaust outlet 3b is provided on the side surface of the container 3 such as a ladle. However, as shown in FIG. It is also possible to provide an exhaust outlet for discharging the combustion gas in the container 3 such as a pot. In the heating device 25 shown in FIG. 6A, a configuration is shown in which an exhaust outlet 2b is provided on the upper surface of the burner mounting plate 2, and the combustion gas from the guide 2a is supplied to the container 3 such as a ladle as shown by a dotted line. The light is transmitted from the bottom surface 3c to the inner wall portion 3d, reaches the burner mounting plate 2, passes through the burner mounting plate 2, and reaches the exhaust outlet 2b provided on the upper surface of the burner mounting plate 2.
[0036]
Further, in the heating device 26 of FIG. 6B, a configuration is shown in which an exhaust outlet 2b is provided on the side surface of the burner mounting plate 2, and the combustion gas from the guide 2a is supplied to a ladle or the like as in FIG. 6A. Transmitted from the bottom surface 3c of the container 3 to the inner wall portion 3d, reaches the burner mounting plate 2, passes through the burner mounting plate 2, and reaches the exhaust outlet 2b provided on the side surface of the burner mounting plate 2. . Thus, even if the exhaust outlet 2b is provided in any part of the burner mounting plate 2, it is possible to reliably discharge the combustion gas from the container 3 such as a ladle.
[0037]
【The invention's effect】
ADVANTAGE OF THE INVENTION According to this invention, since a container, such as a ladle, is covered with a plate (burner attachment plate) which attached a single burner (burner) to the container, such as a ladle, and the container, such as a ladle, is heated, the combustion by a burner The gas does not diffuse and the heating efficiency can be improved. In addition, the direction of movement of the combustion gas generated from the flame from the tip of the burner by the blower can be determined in the direction of the bottom surface of a container such as a ladle by passing through the guide, and the combustion gas due to the diffusion of the combustion gas flows to the bottom surface. It is possible to prevent a so-called short-path phenomenon, in which the air does not reach and directly advances in the direction of the exhaust outlet. Further, since the combustion gas directly reaches the bottom portion of the container such as a ladle, the bottom portion is sufficiently heated, and as a result, the entire container such as the ladle is heated in a short time and a high temperature ( High combustion temperature).
[0038]
Specifically, FIG. 7 shows the temperature (in-furnace temperature) of a container such as a ladle according to the heating time when the ladle preheating method with a lid according to the present invention and the conventional open ladle heating method are used. is there. As is clear from FIG. 7, it can be understood that the ladle preheating method with the lid according to the present invention raises the furnace temperature with respect to the heating time faster than the conventional open ladle heating method.
[0039]
A burner (combustion device) attached to a burner attachment plate, which is a plate serving as a lid of a container such as a ladle, is packaged with a blower, an electromagnetic shut-off valve, a monitoring device, and a control device. ) Can be reduced in equipment cost as compared with a case where a blower or the like is installed separately from the above. Further, since the burner mounting plate is attached to the container such as a ladle and the lid is attached, there is no heat radiation (heat loss) from the open portion and there is no rise in the surrounding temperature. Therefore, the temperature of the working environment does not fluctuate and the working environment can be maintained in good condition, and the health management of the worker can be easily maintained.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a state in which a container heating device according to Example 1 of the present invention is attached to a container.
FIG. 2 is a cross-sectional view showing a state where the container heating device according to Example 1 of the present invention is attached to the container.
FIG. 3 is a flowchart showing an operation state of a burner in the container heating device according to the present invention.
FIG. 4 is a cross-sectional view showing a state in which the container heating device according to Example 2 of the present invention is attached to the container.
FIG. 5 is a cross-sectional view showing a state where the container heating device according to Example 2 of the present invention is attached to the container.
FIG. 6 is a cross-sectional view of a container heating device according to the present invention in which an exhaust outlet is provided in a lid.
(A) is sectional drawing of the heating apparatus of the container which provided the exhaust outlet in the upper surface of the lid.
(B) is sectional drawing of the heating apparatus of the container which provided the exhaust outlet in the side surface of the lid.
FIG. 7 is a graph showing a case where a container such as a ladle is heated using a ladle preheating method with a lid according to the present invention and a conventional open ladle heating method to compare the temperature.
FIG. 8 is an explanatory view showing a conventional method of heating a container such as an open ladle.
FIG. 9 is an explanatory view showing a conventional method for heating a container such as a truncated inverted conical ladle.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Burner, 1a ... Burner tip part, 2 ... Burner mounting plate, 2a ... Guide, 3 ... Ladle and other containers, 3a ... Opening, 3b ... Exhaust outlet, 5, 15, 25, 26 ... Heating device, 8 …flame,

Claims (6)

A tip for discharging the combustion gas to deliver the combustion gas into the container;
Blowing means for supplying air to burn fuel at the distal end to release the combustion gas, and supplying air to the distal end of the combustor to move the combustion gas by air. ,
Adjusting means for supplying or shutting off the fuel supplied to the tip portion,
Ignition means for igniting the fuel supplied to the tip,
Monitoring means for detecting whether air is being supplied to the tip by the blower, and detecting ignition of the tip to send the combustion gas into the container,
Controlling the supply of the fuel to the tip or or shutting off, and control means for controlling the amount of air required for combustion of the fuel, a combustor comprising:
A container mounted around the tip of the combustor, covering an open portion of the container, and positioning the tip of the combustor. The container heating device according to claim 1, wherein the plate is provided with a guide extending around a peripheral portion where the tip portion of the combustor is incorporated. The container heating device according to claim 1, wherein an exhaust outlet for discharging the combustion gas from the container is provided at any part of the container. 3. The container heating device according to claim 1, wherein an exhaust outlet for discharging the combustion gas in the container is provided in the plate. 4. The container heating device according to any one of claims 1 to 4, wherein the blowing means and the control means in the combustor are connected to the distal end of the combustor via a duct. The plate, which is mounted around the tip of the combustor, has an open portion of the container so that the guide extending around a portion of the periphery where the tip of the combustor is incorporated enters the container. Covering step;
Supplying air to burn the fuel at the tip of the combustor and release the combustion gas, and igniting the fuel supplied to the tip of the combustor;
Moving the combustion gases generated by the flame from the tip of the combustor by air along the guide extending around a peripheral portion where the tip of the combustor is incorporated;
Heating the bottom surface of the container with the combustion gas having reached the bottom surface of the container, heating the side surface of the container, and discharging the gas from the exhaust outlet.

Images