Method and device for controlling circulation state of melt in pipeline

Abstract

The invention provides a method and device for controlling the circulation state of melt in a pipeline, and belongs to the technical field of metallurgy. A melt switch device is installed on a sealed pipeline, the circulation state of the melt in the pipeline is subjected to switch control, and a water-cooling induction coil annularly arranged on the outer side of the sealed pipeline is in a power-on state; the conductive refractory material channel and the melt in the melt channel are heated, so that the melt is in a flowing state, and the electromagnetic heating mode is high in heat efficiency and low in heat loss; when melt in a flowing state in the sealed pipeline needs to be cut off, the water-cooling induction coil is in a power-off state, cooling water is introduced into the cooling encircling sleeve, the melt in the melt channel located at the position is rapidly cooled, the melt is solidified, and the purpose of cutting off flowing in the pipeline is achieved. Compared with the prior art that a valve is adopted to control the circulation state of the melt, the requirement for material performance is low, and economical efficiency is high.

Description

Technical Field

[0001] The present invention relates to the field of metallurgical technology, and more specifically, to a method and device for controlling the flow state of a melt in a pipeline. Background Art

[0002] In the field of industrial applications, especially in metal smelting processes, controlling the flow and cut-off state of high-temperature melts (such as metal liquid or slag fluid) in pipelines is a common problem in high-temperature melt transportation.

[0003] At present, in order to keep the high-temperature metal liquid or slag fluid in the pipeline in a flowing state to avoid pipeline blockage, the generally adopted method is to heat the pipeline wall by a conventional resistance heating body, and use the pipeline wall to transfer heat to the fluid in the pipeline, so as to increase the temperature of the outer side of the fluid in the pipe, thereby keeping it in a flowing state; the control method for the flow state of the melt in the pipeline is to install valves on the pipeline to meet the requirements of the transportation project of the high-temperature metal liquid or slag fluid.

[0004] In the above-mentioned method of controlling the flow of the hot melt in the pipeline, when the resistance heating body directly heats the sealed pipeline, the heat loss on the outer side of the resistance heating body is large, and the circulation and cut-off state of the high-temperature melt in the pipeline are controlled by the resistance heating body and the valve, which requires high heat resistance of the materials of the resistance heating body and the valve. Therefore, the method of controlling the fluid by resistance heating and valve opening and closing is usually difficult to implement economically due to problems such as materials, structure, and condensation.

[0005] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present invention, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Summary of the invention

[0006] In view of the above problems, the purpose of the present invention is to provide a method and device for controlling the flow state of the melt in a pipeline, so as to solve the problems in the prior art of controlling the flow state of the fluid in a sealed pipeline by resistance heating and valve opening and closing, such as large heat loss and high requirements on the heat resistance of the material.

[0007] The present invention provides a method for controlling the flow state of melt in a pipeline, comprising the following steps:

[0008] Step S1, installing a melt switch device on a sealed pipe; wherein:

[0009] The fuse switch device comprises a water-cooled induction heating device, a conductive refractory material channel and a cooling jacket; the water-cooled induction heating device comprises a water-cooled induction coil arranged around the outside of the sealed pipe; the conductive refractory material channel is arranged inside the sealed pipe; a melt channel is formed inside the conductive refractory material channel; the cooling jacket is arranged on the sealed pipe and is located at the side end of the water-cooled induction coil; a jacket water inlet and a jacket water outlet are respectively arranged at both ends of the cooling jacket;

[0010] Step S2, heating the conductive refractory material channel and the melt in the melt channel by energizing the water-cooled induction coil, so that the melt is in a flowing state in the melt channel;

[0011] Step S3, when it is necessary to cut off the melt in the flowing state in the melt channel, the water-cooled induction coil is placed in a power-off state, and the sealed pipe is cooled by cooling water introduced into the cooling jacket through the water inlet of the jacket, so that the conductive refractory material channel is locally cooled, and the melt in the flowing state in the melt channel is rapidly cooled and solidified, so as to cut off the melt in the melt channel.

[0012] In addition, a preferred solution is that, during the process of installing the melt switch device on the sealed pipe, the conductive refractory material channel is arranged in the middle of the sealed pipe.

[0013] In addition, a preferred solution is that before installing the melt switch device on the sealed pipe, it also includes: performing non-magnetic sealing treatment on the sealed pipe to make the sealed pipe a non-magnetic sealed pipe.

[0014] The present invention also provides a melt switch device, which is used in the above-mentioned method for controlling the flow state of melt in a pipeline, wherein the melt switch device comprises a water-cooled induction heating device, a conductive refractory material channel and a cooling jacket; wherein:

[0015] The water-cooled induction heating device comprises a water-cooled induction coil arranged around the outside of the sealed pipe;

[0016] The conductive refractory material channel is arranged inside the sealed pipe; the inside of the conductive refractory material channel forms a melt channel;

[0017] The cooling jacket is arranged on the sealing pipe and is located at the side end of the water-cooled induction coil; a jacket water inlet and a jacket water outlet are respectively arranged at both ends of the cooling jacket.

[0018] In addition, a preferred solution is that the cooling jacket is arranged close to any one end or both ends of the water-cooled induction coil.

[0019] In addition, a preferred solution is that a water cooling channel is provided on the water-cooled induction coil; and a channel water inlet and a channel water outlet are provided on the water cooling channel.

[0020] In addition, a preferred solution is that an inner insulation material layer is provided between the outer side wall of the conductive refractory material channel and the inner side wall of the sealed pipe.

[0021] In addition, a preferred solution is that the inner insulation material layer is any one of a glass fiber layer, an asbestos layer, a rock wool layer, a silicate layer, and a carbon felt, or at least two of them combined in any order.

[0022] In addition, a preferred solution is that the sealed pipe is a non-magnetic sealed steel pipe.

[0023] In addition, a preferred solution is that the conductive refractory material channel is a graphite channel.

[0024] It can be seen from the above technical scheme that the method and device for controlling the flow state of the melt in the pipeline provided by the present invention control the flow state of the melt in the pipeline by installing a melt switch device on the sealed pipeline, so that the water-cooled induction coil arranged on the outside of the sealed pipeline is in an energized state, and the conductive refractory material channel and the melt in the melt channel are heated to make the melt in a flowing state, and the electromagnetic heating method is used, with high thermal efficiency and low heat loss; when it is necessary to cut off the melt in a flowing state inside the sealed pipeline, the water-cooled induction coil is in an off-power state, and cooling water is introduced into the cooling sleeve to quickly cool the conductive refractory material channel and the melt in the melt channel, so that the melt solidifies to achieve the purpose of cutting off the flow in the pipe. Compared with the prior art of using valves to control the melt flow state, it has low requirements on material properties and high economy.

[0025] In order to achieve the above and related purposes, one or more aspects of the present invention include the features that will be described in detail later. The following description and the accompanying drawings describe some exemplary aspects of the present invention in detail. However, these aspects indicate only some of the various ways in which the principles of the present invention can be used. In addition, the present invention is intended to include all these aspects and their equivalents. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] By referring to the following description in conjunction with the accompanying drawings, and with a more comprehensive understanding of the present invention, other objects and results of the present invention will become more apparent and easy to understand. In the accompanying drawings:

[0027] Figure 1 is a structural schematic diagram of a fuse switch device according to an embodiment of the present invention;

[0028] Figure 2 A schematic diagram of the position setting of a pure water cooler according to an embodiment of the present invention;

[0029] Figure 3 A schematic diagram of another position setting of a pure water cooler according to an embodiment of the present invention;

[0030] Figure 4 The figure is a flow chart of a method for controlling melt flow status in a pipeline according to an embodiment of the present invention.

[0031] In the attached drawings, 1-sealed pipe, 2-water-cooled induction coil, 3-conductive refractory material channel, 31-melt channel, 4-melt, 5-outer insulation material layer, 6-cooling jacket, 7-inner insulation material layer.

[0032] The same reference numerals throughout the drawings indicate similar or corresponding features or functions. DETAILED DESCRIPTION

[0033] In the following description, for the purpose of explanation, numerous specific details are set forth in order to provide a thorough understanding of one or more embodiments. However, it is apparent that these embodiments may also be implemented without these specific details.

[0034] In view of the problems in the above-mentioned prior art that the flow state of the fluid in a sealed pipe is controlled by resistance heating and valve opening and closing, such as large heat loss and high requirements on the heat resistance of the material, a method and device for controlling the flow state of the melt in a pipe are proposed.

[0035] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0036] In order to illustrate the method and device for controlling the flow state of melt in a pipeline provided by the present invention, Figure 1 The structure of a fuse switch device according to an embodiment of the present invention is shown; Figure 2 shows the position of the cooling jacket according to an embodiment of the present invention; Figure 3 shows another position of the cooling jacket according to an embodiment of the present invention; Figure 4 The flowchart of the method for controlling the melt flow state in a pipeline according to an embodiment of the present invention is shown.

[0037] like Figures 1 to 4 As shown together, the present invention provides a method for controlling the flow state of melt in a pipeline, comprising the following steps:

[0038] Step S1, installing a melt switch device on the sealed pipe 1; wherein,

[0039] The melt switch device includes a water-cooled induction heating device, a conductive refractory material channel 3 and a cooling jacket 6; the water-cooled induction heating device includes a water-cooled induction coil 2 arranged around the outside of a sealed pipe 1; the conductive refractory material channel 3 is arranged inside the sealed pipe 1; a melt channel 31 is formed inside the conductive refractory material channel 3; the cooling jacket 6 is arranged on the sealed pipe 1 and is located at the side end of the water-cooled induction coil 2; a jacket water inlet and a jacket water outlet are respectively arranged at both ends of the cooling jacket 6;

[0040] Step S2, by making the water-cooled induction coil 2 in an energized state, the conductive refractory material channel 3 and the melt in the melt channel 31 are heated, so that the melt is in a flowing state in the melt channel 31; at this time, the cooling jacket 6 is in a water-off state.

[0041] Step S3, when it is necessary to cut off the melt in the flowing state in the melt channel 31, the water-cooled induction coil 2 is in a power-off state, and the sealing pipe 1 is cooled by cooling water introduced into the cooling jacket 6 through the jacket water inlet, so that the conductive refractory material channel 3 is locally cooled, and the melt in the flowing state in the melt channel 31 is quickly cooled and solidified, so as to cut off the melt in the melt channel 31.

[0042] It should be noted that the melt switch device in the present invention can be installed on a certain section of the sealed pipe 1 according to actual needs, so as to realize the control of the melt flow state in the sealed pipe section. Multiple melt switch devices can also be arranged at intervals on the sealed pipe 1 to control the flow state of the melt in multiple sections of the sealed pipe differently according to the needs of the melt transportation project. The present invention does not make any special limitations on this.

[0043] By installing a melt switch device on the sealed pipe 1, the flow state of the melt in the pipe is controlled, so that the water-cooled induction coil 2 arranged on the outside of the sealed pipe 1 is in an energized state, and the conductive refractory material channel 3 and the melt in the melt channel 31 are heated to make the melt in a flowing state. The electromagnetic heating method is used with high thermal efficiency and low heat loss. When it is necessary to cut off the melt in a flowing state inside the sealed pipe 1, the water-cooled induction coil 2 is in an off-power state, and cooling water is introduced into the cooling sleeve 6 to quickly cool the conductive refractory material channel 3 and the melt in the melt channel 31, so that the melt solidifies to achieve the purpose of cutting off the flow in the pipe. Compared with the prior art of using valves to control the melt flow state, the material performance requirements are low and the economy is high.

[0044] As a preferred solution of the present invention, during the process of installing the melt switch device on the sealed pipe 1 , the conductive refractory material channel 3 is arranged in the middle of the sealed pipe 1 .

[0045] The conductive refractory material channel 3 is arranged in the middle of the sealed pipe 1, so that the overall structure is more reasonable and the melt 4 in the melt channel 31 is heated more evenly.

[0046] As a preferred solution of the present invention, before installing the melt switch device on the sealed pipe 1, the method further includes: performing a non-magnetic sealing treatment on the sealed pipe 1 to make the sealed pipe 1 a non-magnetic sealed pipe.

[0047] The sealed pipe 1 is generally a steel pipe. The sealed pipe 1 can be subjected to non-magnetic sealing treatment by the currently existing steel pipe demagnetization method, for example, by using an induction coil to demagnetize the steel pipe, heat treatment to demagnetize the steel pipe, etc., and then by seamless welding and other methods to make the pipe wall of the non-magnetic steel pipe a seamless sealed state. The present invention does not make any special limitation on this.

[0048] The melt switch device provided by the present invention is used in the melt flow state control method in the pipeline as described above. The melt switch device includes a water-cooled induction heating device, a conductive refractory material channel 3 and a cooling jacket 6; wherein,

[0049] The water-cooled induction heating device comprises a water-cooled induction coil 2 arranged around the outside of a sealed pipe 1;

[0050] The conductive refractory material channel 3 is arranged inside the sealed pipe 1; the inside of the conductive refractory material channel 3 forms a melt channel 31;

[0051] The cooling jacket 6 is arranged on the sealed pipe 1 and is located at the side end of the water-cooled induction coil 2; a jacket water inlet and a jacket water outlet are respectively arranged at both ends of the cooling jacket 6.

[0052] As a preferred solution of the present invention, an outer insulation material layer 5 is provided between the water-cooled induction coil 2 and the outer side wall of the sealed pipe 1 .

[0053] The outer side of the sealed pipe 1 is insulated by the outer insulation material layer 5 so that the external temperature of the sealed pipe 1 will not be too high.

[0054] As a preferred solution of the present invention, the cooling jacket 6 is arranged close to any one end or both ends of the water-cooled induction coil 2 .

[0055] It should be noted that the cooling jacket 6 can be arranged at the rear end of the water-cooled induction coil 2. Figure 2 As shown, it can also be arranged at the front end of the water-cooled induction coil 2, such as Figure 3 As shown, two cooling jackets 6 may also be provided, that is, cooling jackets 6 are provided at both ends of the water-cooled induction coil 2 to cool the conductive refractory channel 3 and the melt 4 therein, thereby accelerating the cooling speed.

[0056] As a preferred solution of the present invention, a water cooling channel is provided on the water-cooled induction coil 2; and a channel water inlet and a channel water outlet are provided on the water cooling channel.

[0057] It should be noted that the water cooling channel can be arranged inside the water cooling induction coil 2 or on one side of the water cooling induction coil 2, and the present invention does not specifically limit this. The cooling water flowing in from the channel water inlet flows along the water cooling channel to cool the water cooling induction coil 2.

[0058] The cooling jacket 6 and the water-cooled induction coil 2 may be connected to the same cooling water source or may be provided with independent water sources, which is not particularly limited in the present invention.

[0059] As a preferred solution of the present invention, an inner insulation material layer 7 is provided between the outer side wall of the conductive refractory material channel 3 and the inner side wall of the sealed pipe 1 .

[0060] The inner side of the sealed pipe 1 is insulated by the inner insulation material layer 7 to prevent the heat generated by the heating of the conductive refractory material channel 3 from affecting the sealed pipe 1 .

[0061] As a preferred embodiment of the present invention, the inner insulation material layer 7 is any one of a glass fiber layer, an asbestos layer, a rock wool layer, a silicate layer, and a carbon felt, or at least two of them combined in any order.

[0062] As a preferred embodiment of the present invention, the outer insulation material layer 5 is any one of a glass fiber layer, an asbestos layer, a rock wool layer, a silicate layer, and a carbon felt, or at least two of them combined in any order.

[0063] It should be noted that the inner insulation material layer 7 and the outer insulation material layer 5 are preferably but not limited to any one of glass fiber layer, asbestos layer, rock wool layer, silicate layer, carbon felt or at least two of them combined in any order, and the present invention does not make any special limitation on this.

[0064] As a preferred solution of the present invention, the sealed pipe 1 is a non-magnetic sealed steel pipe.

[0065] The sealed pipe 1 is preferably but not limited to a steel pipe with non-magnetic sealing. When the water-cooled induction coil 2 is flowing with water and powered on, the eddy current loss generated therein is small, so that the water-cooled induction coil 2 has a good heating effect on the conductive refractory material channel 3, and the steel pipe with non-magnetic sealing has good high-temperature stability.

[0066] As a preferred solution of the present invention, a power supply (not shown in the figure) is connected to the water-cooled induction coil 2. The water-cooled induction coil 2 is powered by the power supply.

[0067] As a preferred embodiment of the present invention, the conductive refractory material channel 3 is a graphite channel or other refractory materials.

[0068] It should be noted that the conductive refractory material channel 3 is preferably, but not limited to, a graphite channel, and the water-cooled induction coil 2 has a better heating effect on it.

[0069] It can be seen from the above specific embodiments that the method and device for controlling the flow state of the melt in the pipeline provided by the present invention controls the flow state of the melt in the pipeline by installing a melt switch device on the sealed pipeline, so that the water-cooled induction coil arranged on the outside of the sealed pipeline is in an energized state, and the conductive refractory material channel and the melt in the melt channel are heated to make the melt in a flowing state, and the electromagnetic heating method is used, with high thermal efficiency and low heat loss; when it is necessary to cut off the melt in a flowing state inside the sealed pipeline, the water-cooled induction coil is in an off-power state, and cooling water is introduced into the cooling sleeve to quickly cool the conductive refractory material channel and the melt in the melt channel, so that the melt solidifies to achieve the purpose of cutting off the flow in the pipe. Compared with the prior art of using valves to control the melt flow state, it has low requirements on material properties and high economy.

[0070] As described above, the method and device for controlling the flow state of melt in a pipeline proposed by the present invention are described by way of example with reference to the accompanying drawings. However, it should be understood by those skilled in the art that various improvements can be made to the method and device for controlling the flow state of melt in a pipeline proposed by the present invention without departing from the content of the present invention. Therefore, the protection scope of the present invention should be determined by the content of the attached claims.

Claims

1. A method for controlling the flow state of melt in a pipeline, characterized in that: The steps include: Step S1, installing a melt switch device on a sealed pipe; wherein: The fuse switch device comprises a water-cooled induction heating device, a conductive refractory material channel and a cooling jacket; the water-cooled induction heating device comprises a water-cooled induction coil arranged around the outside of the sealed pipe; the conductive refractory material channel is arranged inside the sealed pipe; a melt channel is formed inside the conductive refractory material channel; the cooling jacket is arranged on the sealed pipe and is located at the side end of the water-cooled induction coil; a jacket water inlet and a jacket water outlet are respectively arranged at both ends of the cooling jacket; Step S2, heating the conductive refractory material channel and the melt in the melt channel by energizing the water-cooled induction coil, so that the melt is in a flowing state in the melt channel; Step S3, when it is necessary to cut off the melt in the flowing state in the melt channel, the water-cooled induction coil is placed in a power-off state, and the sealed pipe is cooled by cooling water introduced into the cooling jacket through the water inlet of the jacket, so that the conductive refractory material channel is locally cooled, and the melt in the flowing state in the melt channel is rapidly cooled and solidified, so as to cut off the melt in the melt channel.

2. The method for controlling the flow state of melt in a pipeline according to claim 1, characterized in that: During the installation of the melt switch device on the sealed pipeline, The conductive refractory material channel is arranged in the middle of the sealed pipe.

3. The method for controlling the flow state of melt in a pipeline according to claim 1, characterized in that: Before installing the melt switch device on the sealed pipeline, it also includes: The sealed pipe is subjected to a non-magnetic sealing treatment so that the sealed pipe is a non-magnetic sealed pipe.

4. A melt switch device, used in the method for controlling the flow state of melt in a pipeline according to any one of claims 1 to 3, characterized in that: The melt switch device includes a water-cooled induction heating device, a conductive refractory material channel and a cooling jacket; wherein, The water-cooled induction heating device comprises a water-cooled induction coil arranged around the outside of the sealed pipe; The conductive refractory material channel is arranged inside the sealed pipe; the inside of the conductive refractory material channel forms a melt channel; The cooling jacket is arranged on the sealing pipe and is located at the side end of the water-cooled induction coil; a jacket water inlet and a jacket water outlet are respectively arranged at both ends of the cooling jacket.

5. The melt switch device according to claim 4, characterized in that: The cooling jacket is arranged close to any one end or both ends of the water-cooled induction coil.

6. The melt switch device according to claim 4, characterized in that: A water cooling channel is provided on the water-cooled induction coil; A channel water inlet and a channel water outlet are arranged on the water cooling channel.

7. The melt switch device according to claim 4, characterized in that: An inner heat insulating material layer is arranged between the outer side wall of the conductive refractory material channel and the inner side wall of the sealed pipe.

8. The melt switch device according to claim 7, characterized in that: The inner insulation material layer is any one of a glass fiber layer, an asbestos layer, a rock wool layer, a silicate layer, and a carbon felt, or at least two of them combined in any order.

9. The melt switch device according to claim 4, characterized in that: The sealed pipe is a non-magnetic sealed steel pipe.

10. The melt switch device according to claim 1, characterized in that: The conductive refractory material channel is a graphite channel.

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