TWI731662B - Method and system for measuring temperature of material layer in furnace - Google Patents

Abstract

A method and a system for measuring temperature of a material layer in furnace are provided. The system includes a furnace and a plurality of flexible thermocouples, wherein the furnace includes a body and a plurality of channels, the flexible thermocouples is configured to pass through the channels to measure the temperature of the material layer of the furnace.

Description

Method and system for measuring temperature of material bed of reaction furnace

The present invention relates to a method and system for measuring the temperature of a material bed, in particular to a method and system for measuring the temperature of a material bed of a reaction furnace.

Common temperature measurement methods are divided into contact type and non-contact type. The thermocouple used for temperature measurement of blast furnace roof is contact type, which is an intrusive, single-point sensing type, and is easily affected by harsh environments, resulting in sensing The detector is not functioning normally. In addition, non-contact temperature measurement uses infrared and other methods. Among them, when the furnace temperature is low, a thermocouple is used to measure the temperature. Generally, the thermocouple cannot be used when the temperature exceeds a certain temperature; the tungsten rhenium thermocouple can theoretically measure the temperature up to 2000° C, but its high-temperature service life is limited, no thermocouple can be used if it exceeds 2000°C; therefore, infrared temperature measurement is mostly used in the temperature measurement of the reactor.

In the operation of the blast furnace, the temperature distribution of the airflow in the furnace has been understood through the reading of the thermocouple on the temperature measuring rod on the top of the furnace. However, due to the high dust content of the hot air flow in the furnace, the thermocouple on the temperature measuring rod is often blocked, making the value of the temperature measurement abnormal. This situation not only affects the operator to judge the furnace condition and adjust the cloth, but also Cause maintenance burden every time the furnace is scheduled to be repaired and shut down. In addition, when the charge is laid down, the charge is easy to hit the temperature measuring rod, and the material flow trajectory is scattered, causing the shape of the material surface under the temperature measuring rod to appear concave, resulting in uneven airflow distribution in the furnace, thus affecting The heat utilization rate of the furnace gas.

In the conventional technology, the temperature measuring point of the thermocouple is placed above the charge to measure the temperature close to a fixed position above the charge. However, when the charge is heated, it will soften and melt, which will cause the appearance and volume of the charge to change , The height of the charge will then move down and away from the position of the thermocouple, so that the thermocouple cannot measure the actual temperature of the charge during the reaction process.

Therefore, in order to overcome the shortcomings and deficiencies in the prior art, it is necessary for the present invention to provide an improved method and system for measuring the temperature of the material bed of the reaction furnace to solve the above-mentioned problems in the conventional technology.

The main purpose of the present invention is to provide a method and system for measuring the temperature of the material bed of a reaction furnace, which utilizes the temperature measurement end point of a coilable galvanic couple to be embedded between specific particles in the material bed, thereby accurately measuring The temperature of the material layer avoids errors in the temperature measurement of the material layer.

In order to achieve the above objective, the present invention provides a method for measuring the temperature of the material bed of a reaction furnace. The method includes a preparation step, a placing step, a reaction step, and a temperature measurement step; in the preparation step, the preparation At least one windable electric couple, wherein the windable electric couple includes a temperature measuring terminal; in the placing step, the windable electric couple is extended into the reaction furnace, so that the measurement of the windable electric couple The temperature endpoint is located at a specific position and is in contact with a plurality of specific particles of the material layer; in the reaction step, the reaction furnace is started to cause a plurality of particles of the material layer to undergo a reaction, and the particles are consumed in the process The upper surface of the material layer moves downward; in the temperature measurement step, the temperature measurement end of the winding coupler moves with a plurality of specific particles of the material layer, and measures the specific particles in the material layer. The reaction temperature changes during the process.

In an embodiment of the present invention, in the preparation step, the winding type electric couple further includes two thermocouple element wires and a plurality of obstacles, the thermocouple element wires are connected to the temperature measurement end point, and the thermocouple element wires are connected to the temperature measurement terminal. The obstacles are connected in series on the element wires of the thermocouples.

In an embodiment of the present invention, in the preparation step, the winding type electric couple further includes a thermocouple pellet, and the thermocouple pellet is connected in series on the thermocouple element wires and located at the temperature measurement end point And between the obstacles, and the thermocouple pellets are formed by the material of the material layer.

In an embodiment of the present invention, in the placing step, a first windable electric couple and a second windable electric couple are extended into the reaction furnace, wherein the measurement of the first windable electric couple The temperature end point is placed on an upper surface of the material layer, and the temperature measurement end point of the second coilable galvanic couple is placed at a middle position of the material layer.

In an embodiment of the present invention, in the placing step, the first windable couple and the second windable couple respectively extend into the reaction furnace through the two channels of the reaction furnace.

In an embodiment of the present invention, in the placing step, the temperature measuring end point of the first winding type electric couple and the temperature measuring end point of the second winding type electric couple are placed in one of the reaction furnaces A location near the axis.

In order to achieve the above objective, the present invention provides a system for measuring the temperature of the material bed of a reaction furnace. The system includes a reaction furnace and a plurality of coilable couples; the reaction furnace includes a furnace body and a plurality of channels, The furnace body is configured to accommodate a material layer with a plurality of particles, and the holes are formed on a side wall of the furnace body; the coilable couples are configured to correspondingly pass through the holes, wherein each The winding type galvanic couple includes a temperature measuring terminal configured to contact a plurality of specific particles of the material layer.

In an embodiment of the present invention, each coilable electric couple further includes two thermocouple element wires and a plurality of obstacles. The thermocouple element wires are connected to the temperature measurement end point, and the obstacles are connected in series. These thermocouples are on the wire.

In an embodiment of the present invention, each of the winding-type electric couples further includes a thermocouple pellet, and the thermocouple pellet is connected in series on the thermocouple element wires and located at the temperature measurement end point and the obstacles In between, and the thermocouple pellets are formed by the material of the material layer.

In an embodiment of the present invention, the system further includes a temperature measurement module, which is electrically connected to the coilable couples for data processing and recording the temperature measured by the coilable couples.

As mentioned above, through the design of the system for measuring the temperature of the material bed of the reaction furnace of the present invention, the temperature measurement endpoints of the coilable couples are embedded between the specific particles of the material bed. The temperature measurement end point of the type galvanic couple moves with the specific particles of the material layer, so that the temperature measurement end point has the function of following the movement of the particles, and thus is maintained at the upper surface and the middle layer position of the material layer, thereby mixing the material layer During the heating process, the volume of particles moving will change to produce relative displacement, and then the temperature of the material layer can be accurately measured to avoid errors in the temperature measurement of the material layer.

In order to make the above and other objectives, features, and advantages of the present invention more obvious and understandable, the preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. Furthermore, the directional terms mentioned in the present invention, such as up, down, top, bottom, front, back, left, right, inside, outside, side, surrounding, center, horizontal, horizontal, vertical, vertical, axial, The radial direction, the uppermost layer or the lowermost layer, etc., are only the direction of reference to the attached drawings. Therefore, the directional terms used are used to describe and understand the present invention, rather than to limit the present invention.

Please refer to Figures 1 and 2, which are a preferred embodiment of the system for measuring the temperature of the material bed of a reaction furnace of the present invention. The system includes a reaction furnace 2 and a plurality of winding couples 3, 3' , 3", the reaction furnace 2 is configured to contain the charge and heat the charge at a high temperature, for example, above 1400 degrees Celsius, so as to cause the charge to react. The present invention will describe the detailed structure, assembly relationship and operation principle of each element in detail below.

1 and 2, the reaction furnace 2 includes a furnace body 21 and a plurality of holes 22, wherein the furnace body 21 is configured to contain a material layer with a plurality of particles 101, the holes 22 are formed in On a side wall of the furnace body 21. It should be noted that the reaction furnace 2 is suitable for various solid granular material layers, such as pellets of block, cake or high material layers. In one embodiment, the particles 101 of the material layer contain iron-carbon components.

Continuing to refer to Figures 1 and 2, the coilable couples 3, 3', 3" are configured to pass through the channels 22, and each coilable couple 3 (3', 3" ) Includes a temperature measuring terminal 31, two thermocouple element wires 32, a plurality of barriers 33, and a thermocouple pellet 34, wherein the temperature measuring terminal 31 is configured to be in contact with a plurality of specific particles 101 of the material layer , The thermocouple element wires 32 are connected to the temperature measurement terminal 31, the barriers 33 are serially connected to the thermocouple element wires 32, and the thermocouple pellets 34 are serially connected to the thermocouple element wires 32 The upper part is located between the temperature measurement terminal 31 and the barriers 33, and the thermocouple pellet 34 is formed by the material of the material layer (for example, iron-carbon composition).

In this embodiment, the side wall of the furnace body 21 is formed with two channels 22 (for example, a first channel and a second channel), and two winding couples 3 and 3'respectively pass through and straighten the two channels 22. Extend to an upper surface and a middle position of the material layer, for example: the first windable couple 3 extends along the first channel 22 to the upper surface of the material layer, and the second windable couple 3'extends along The second channel 22 extends to the middle position of the material layer, and the third windable couple 3" extends from the bottom of the furnace body 21 to the lower layer position of the material layer.

1 and 2, the system further includes a temperature measurement module 4, the temperature measurement module 4 is electrically connected to the coilable couples 3, 3', 3", configured to Data processing and recording of the temperature measured by these coilable couples 3, 3', 3''.

According to the above structure, as shown in FIG. 4, when the temperature is controlled with the set temperature T1, the reactor 2 heats the charge at a high temperature, thereby causing the charge to react, and the furnace temperature T2 of the reactor 2 follows Rise, wherein, the first windable couple 3 extending along the first channel 22 to the upper surface of the material layer is used to measure the upper temperature T3, and extends along the second channel 22 to the middle position of the material layer The second winding type electric couple 3'is used to measure the middle layer temperature T4, and the third winding type electric couple 3" extending from the bottom of the furnace body 21 to the lower layer position of the material layer is used to measure the lower layer temperature T5. After the charge has reacted for a period of time, as shown in Figure 3, the material layer gradually collapses, causing the upper surface of the material layer to move downwards. At this time, the temperature measurement endpoints of the coilable couples 3, 3' 31 are maintained respectively on the upper surface and middle position of the material layer, and cooperate with the temperature measurement module 4 to obtain and record the temperature of the specific particles 101 of the material layer in the reaction process, which can be matched with the heating process of the material layer There may be situations in which the moving volume of the particles 101 changes to produce relative displacement, and then the temperature of the material layer can be accurately measured to avoid errors in the temperature measurement of the material layer.

As mentioned above, through the design of the system for measuring the temperature of the material bed of the reaction furnace of the present invention, the temperature measurement end points 31 of the coilable couples 3, 3', 3" are embedded in the material bed. Between the specific particles 101, the temperature measurement endpoints 31 of the winding couples 3, 3'move with the specific particles 101 of the material layer, so that the temperature measurement endpoints 31 have the function of following the movement of the particles 101, thus Maintain the position of the upper surface and the middle layer of the material layer respectively, so that the volume change of the particle 101 movement during the heating process of the batch material layer will cause relative displacement, and then the temperature of the material layer can be accurately measured to avoid The temperature measurement of the material layer produces errors.

Please refer to Figure 5 in conjunction with Figures 1 and 2, which is a preferred embodiment of the method of the present invention for measuring the temperature of the material bed of the reaction furnace. The present invention is used for measuring the temperature of the material bed of the reaction furnace. The method is used to operate the above-mentioned system for measuring the temperature of the material bed of the reaction furnace, wherein the method for measuring the temperature of the material bed of the reaction furnace includes a preparation step S201, a placing step S202, a reaction step S203, and A temperature measurement step S204. The present invention will describe the operation principle of each step in detail below.

Continuing to refer to Fig. 5 and in conjunction with Figs. 1 and 2, in the preparation step S201, at least one or more coilable couples 3, 3', 3" are prepared, wherein each coilable couple 3( 3', 3'') includes a temperature measuring terminal 31, two thermocouple element wires 32, a plurality of impediments 33 and a thermocouple pellet 34; in this embodiment, the thermocouple element wires 32 are connected to The temperature measuring terminal 31 and the barriers 33 are connected in series on the thermocouple element wires 32, and the thermocouple pellet 34 is serially connected to the thermocouple element wires 32 and located at the temperature measuring terminal 31 and Between the obstacles 33, and the thermocouple pellet 34 is formed by the material of the material layer.

Continuing to refer to Fig. 5 and in conjunction with Figs. 1 and 2, in the placing step S202, the coilable couples 3, 3', and 3" are extended into the reaction furnace 2, so that the coilable electrical couples The temperature measurement endpoints 31 of couples 3, 3', and 3" are located at a specific position and are in contact with a plurality of specific particles 101 of the material layer; in this embodiment, a first winding type galvanic couple 3 and A second windable galvanic couple 3'extends into the reaction furnace 2, wherein the temperature measuring terminal 31 of the first windable galvanic couple 3, is placed on an upper surface of the material layer, and the second windable galvanic couple 3' The temperature measuring end 31 of the galvanic couple 3'is placed at a middle position of the material layer, and the temperature measuring end 31 of a third winding type galvanic couple 3'is placed at the lower layer position of the material layer. The first windable electric couple 3 and the second windable electric couple 3'respectively extend into the reactor 2 through the two channels 22 of the reactor 2, and the measurement of the first windable electric couple 3 The temperature end point 31 and the temperature measurement end point 31 of the second coilable electric couple 3 ′ are placed at a position near a central axis of the reaction furnace 2.

Continuing to refer to Fig. 5 in conjunction with Figs. 1 and 2, in the reaction step S203, the reaction furnace 2 is started, so that a plurality of particles 101 of the material layer undergo a reaction. In the process, the particles 101 are consumed to cause the The upper surface of the material layer moves downward.

Continuing to refer to Figure 5 in conjunction with Figures 1 and 2, in the temperature measurement step S204, the temperature measurement endpoints 31 of the winding type galvanic couple 3, 3', 3" follow a plurality of specific particles of the material layer 101 moves, and measures the temperature change of the specific particles 101 during the reaction.

As shown in Fig. 4, when the temperature is controlled with the set temperature T1, the reaction furnace 2 heats the charge at a high temperature, thereby causing the charge to react. The temperature T2 in the furnace 2 of the reaction furnace 2 increases accordingly, wherein, The first windable couple 3 extending along the first channel 22 to the upper surface of the material layer is used to measure the upper temperature T3, and the second windable couple extending along the second channel 22 to the middle position of the material layer The electric couple 3'is used to measure the middle layer temperature T4, and the third winding type electric couple 3" extending from the bottom of the furnace body 21 to the lower layer position of the material layer is used to measure the lower layer temperature T5. After the charge has reacted for a period of time, as shown in Figure 3, the material layer gradually collapses, causing the upper surface of the material layer to move downwards. At this time, the temperature measurement endpoints of the coilable couples 3, 3' 31 are maintained respectively on the upper surface and middle position of the material layer, and cooperate with the temperature measurement module 4 to obtain and record the temperature of the specific particles 101 of the material layer in the reaction process, which can be matched with the heating process of the material layer There may be situations in which the moving volume of the particles 101 changes to produce relative displacement, and then the temperature of the material layer can be accurately measured to avoid errors in the temperature measurement of the material layer.

As mentioned above, through the design of the system for measuring the temperature of the material bed of the reaction furnace of the present invention, the temperature measurement end points 31 of the coilable couples 3, 3', 3" are embedded in the material bed. Between the specific particles 101, the temperature measurement endpoints 31 of the winding couples 3, 3'move with the specific particles 101 of the material layer, so that the temperature measurement endpoint 31 has the function of following the movement of the particles 101. Maintain the position of the upper surface and the middle layer of the material layer respectively, so that the volume change of the particle 101 movement during the heating process of the batch material layer will cause relative displacement, and then the temperature of the material layer can be accurately measured to avoid the The temperature measurement of the material layer produces errors.

Although the present invention has been disclosed in preferred embodiments, it is not intended to limit the present invention. Anyone familiar with the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the present invention The scope of protection shall be subject to the scope of the attached patent application.

101: particles 2: reaction furnace 21: Furnace 22: Hole 3: Windable galvanic couple 3’: Windable galvanic couple 3’’: Coilable galvanic couple 31: Temperature measurement endpoint 32: Thermocouple element wire 33: Obstacle 34: Thermocouple pellet 4: Temperature measurement module T1: set temperature T2: furnace temperature T3: Upper temperature T4: Middle temperature T5: Lower temperature S201: Preparation steps S202: Placement steps S203: reaction step S204: temperature measurement step

FIG. 1 is a schematic diagram of a preferred embodiment of the system for measuring the temperature of the material bed of a reaction furnace according to the present invention before the material bed is reacted. Fig. 2 is a schematic diagram of one end of the winding type electric couple in Fig. 1 extending into the reaction furnace. Fig. 3 is a schematic diagram of a preferred embodiment of the system for measuring the temperature of the material bed of the reaction furnace according to the present invention after the material bed is reacted. Fig. 4 is a temperature distribution diagram at different positions of the reaction furnace according to a preferred embodiment of the system for measuring the temperature of the material bed of the reaction furnace according to the present invention. 5 is a flowchart of a preferred embodiment of the method and system for measuring the temperature of the material bed of the reaction furnace according to the present invention.

101: particles

2: reaction furnace

21: Furnace

22: Hole

3: Windable galvanic couple

3’: Windable galvanic couple

3": Coilable couple

4: Temperature measurement module

Claims (8)

A method for measuring the temperature of a material bed of a reaction furnace, the method comprising the steps of: a preparation step of preparing at least one winding type electric couple, wherein the winding type electric couple includes a temperature measuring terminal and two thermocouple elements Wire and a plurality of barriers, the thermocouple element wires are connected to the temperature measurement end point, the barriers are serially connected to the thermocouple element wires; a placing step, the winding type electric couple is extended into the reaction Furnace, so that the temperature measurement end point of the coilable couple is located at a specific position and is in contact with a plurality of specific particles of the material layer; a reaction step starts the reaction furnace so that the plurality of particles of the material layer undergo a process During the reaction, the particles are consumed to cause the upper surface of the material layer to move downward; and a temperature measurement step, where the temperature measurement end point of the winding coupler follows the specific particles of the material layer to move, And measure the temperature changes of the specific particles during the reaction. The method for measuring the temperature of the material bed of a reaction furnace as described in item 1 of the scope of patent application, wherein in the preparation step, the winding type electric couple further includes a thermocouple pellet, and the thermocouple pellet string It is connected to the element wires of the thermocouples and is located between the temperature measuring end point and the obstacles, and the thermocouple pellets are formed by the material of the material layer. The method for measuring the temperature of the material bed of the reaction furnace as described in the first item of the scope of patent application, wherein in the placing step, a first coilable couple and a second coilable couple are extended into In the reaction furnace, the temperature measurement end point of the first winding type electric couple is placed on an upper surface of the material layer, and the temperature measurement end point of the second winding type electric couple is placed at a middle position of the material layer . The method for measuring the temperature of the material bed of the reaction furnace as described in item 3 of the scope of the patent application, wherein in the placing step, the first coilable couple and the second coilable couple pass through the The two channels of the reaction furnace extend into the reaction furnace. As described in item 3 of the scope of patent application, it is used to measure the temperature of the material bed of the reaction furnace The method, wherein in the placing step, the temperature measurement end point of the first winding type electric couple and the temperature measurement end point of the second winding type electric couple are placed at a position near a central axis of the reaction furnace . A system for measuring the temperature of a material bed of a reaction furnace, comprising: a reaction furnace including a furnace body and a plurality of channels, the furnace body is configured to accommodate a material bed with a plurality of particles, and the channels are formed On a side wall of the furnace body; and a plurality of winding-type electric couples, which are arranged to correspondingly pass through the holes, wherein each winding-type electric couple includes a temperature measuring terminal, two thermocouple element wires and multiple A barrier, the temperature measurement end point is configured to contact a plurality of specific particles of the material layer, the thermocouple element wires are connected to the temperature measurement end point, and the barrier elements are serially connected to the thermocouple element wires . As described in item 6 of the scope of patent application, the system for measuring the temperature of the material bed of the reaction furnace, wherein each coilable couple includes a thermocouple pellet, and the thermocouple pellet is connected in series to the thermoelectric The even element line is located between the temperature measurement end point and the obstacles, and the thermocouple pellet is formed by the material of the material layer. The system for measuring the temperature of the material bed of the reaction furnace as described in item 6 of the scope of patent application, wherein the system further includes a temperature measurement module, which is electrically connected to the coilable couples for data processing And record the temperature measured by these coilable couples.

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