A vertical scanning radar device and method with temperature measurement function for blast furnace

Abstract

The invention belongs to the technical field of blast furnace level measurement and temperature measurement, and in particular, relates to a vertical scanning radar device with a temperature measurement function for a blast furnace and a method thereof. The vertical scanning radar device with a temperature measurement function for a blast furnace comprises a sensor mounting rod and a driving mechanism, wherein a radar sensor is arranged on the sensor mounting rod, and a plurality of temperature sensors are arranged on the sensor mounting rod, and the driving mechanism can drive the radar sensor to move from the edge of a furnace wall to the position of a furnace core, so that the material level from the edge of the furnace to the furnace core in the blast furnace can be measured, and the temperature from the edge to the furnace core can be measured; since the sensor mounting rod is hollow, an inert gas can be transported to the inside of the sensor mounting rod through a gas source, so that the radar sensor can be cooled and the antenna of the radar sensor can be cleaned, and the cable inside the sensor mounting rod can also be cooled, so that the device has a longer service life, and the stability of the detection effect of the radar sensor is ensured, and the measurement reliability is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of blast furnace level measurement and temperature measurement, and in particular relates to a vertical scanning radar device and method with a temperature measurement function for a blast furnace. Background Art

[0002] A blast furnace is a metal smelting equipment, mainly used for iron smelting. It uses steel plates as the furnace shell and a refractory brick lining inside the shell. When smelting iron in the blast furnace, iron ore, coke, and slag-making flux are loaded from the top of the furnace, and preheated air is blown in from the tuyere located along the furnace periphery at the bottom of the furnace. Under high temperature, the auxiliary fuel burns with the oxygen in the blown-in air to generate carbon monoxide and hydrogen. The oxygen in the iron ore is removed during the rising process in the furnace, thereby reducing it to obtain iron, and the smelted molten iron is released from the iron mouth.

[0003] During the blast furnace smelting process, it is necessary to measure the distribution of the charge level in the furnace, so as to obtain information such as the surface distribution of the charge, the change in charge depth, and the rate at which the charge descends during the smelting process.

[0004] At present, when the existing vertical scanning radar vertically scans the material surface, the emitted radar wave forms an angle with the blast furnace material surface, and the received radar echo is very small, and the radar measurement ability cannot be exerted. The top environment of the blast furnace is very harsh, with high temperature, high pressure, strong metallic dust, water vapor, blast furnace gas and other environmental factors. In addition, under the conditions of closed continuous production, it has a serious impact on non-contact radar ranging. Therefore, the existing vertical scanning radar measurement data is unreliable or even impossible to measure.

[0005] In addition, during the blast furnace smelting process, it is also necessary to measure the temperature information inside the blast furnace to reflect the temperature information of the charge. The current method is to measure the temperature through a cross temperature measuring device set at the throat of the furnace. However, the cross temperature measuring device is placed horizontally in the furnace and will be impacted by the charge during the blast furnace loading process, which not only affects the service life of the cross temperature measuring device, but also blocks the charge distribution work in the furnace. Summary of the invention

[0006] The present invention aims to provide a vertical scanning radar device and method with temperature measurement function for a blast furnace, so as to solve the technical problem in the prior art that it is difficult to completely and reliably measure the material level from the core to the edge of the blast furnace during the blast furnace smelting process.

[0007] To solve the above technical problems, the first aspect of the present invention is:

[0008] A vertical scanning radar device with a temperature measurement function for a blast furnace is provided, comprising:

[0009] A sensor mounting rod, which is arranged on the blast furnace at a position lower than the chute at the furnace throat, a radar sensor is vertically arranged on the sensor mounting rod, and a plurality of temperature sensors are arranged on the sensor mounting rod, the sensor mounting rod is hollow, and one end of the sensor mounting rod passes through the furnace shell at the furnace throat, and a cable is laid inside the sensor mounting rod for supplying power and transmitting signals to the radar sensor and the temperature sensor;

[0010] A driving mechanism, the driving mechanism is used to drive the sensor mounting rod from the inner edge of the blast furnace to the furnace core change detection position in the blast furnace;

[0011] The gas source is used to deliver inert gas from the outside to the inside of the sensor mounting rod, so as to cool the radar sensor and clean the antenna of the radar sensor, and also cool the cables inside the sensor mounting rod.

[0012] Preferably, the sensor mounting rod includes an arc-shaped rod portion and a vertical rod portion, the arc-shaped rod portion is close to the inner wall of the blast furnace, and the shape of the arc-shaped rod portion matches the inner wall of the blast furnace; the radar sensor is arranged at the end position of the arc-shaped rod portion, and the temperature sensor is arranged along the arc-shaped rod portion; the vertical rod portion passes through the furnace shell at the furnace throat.

[0013] Preferably, the driving mechanism is an angular stroke driving device for driving the vertical rod to rotate, and the vertical rod further drives the arc-shaped rod to swing, and the arc-shaped rod can drive the radar sensor to move to the furnace core position during the swinging process.

[0014] Preferably, an interface for installing a temperature sensor is provided on the lower side of the arc-shaped rod portion.

[0015] The second aspect of the present invention is:

[0016] A method for measuring material level and temperature in a blast furnace is provided, using the vertical scanning radar device with temperature measurement function for a blast furnace according to any one of the first aspects of the present invention, the method comprising:

[0017] The sensor mounting rod is driven by the driving mechanism to change the detection position in the blast furnace, and the radar sensor and each temperature sensor on the sensor mounting rod detect the material level information and temperature information at different positions and transmit them to the host computer;

[0018] During the blast furnace production process, inert gas is continuously delivered to the inside of the sensor mounting rod through the gas source, thereby cooling the radar sensor and cleaning the radar sensor antenna, and also cooling the cables inside the sensor mounting rod.

[0019] Preferably, the driving mechanism can drive the radar sensor on the sensor mounting rod to move to the furnace core position, so that the radar sensor measures the material level at the furnace core position; when adding materials to the blast furnace through the chute, the driving mechanism drives the sensor mounting rod to move to the edge position of the blast furnace to avoid it.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. The vertical scanning radar device with temperature measurement function for blast furnace includes a sensor mounting rod and a driving mechanism, wherein the sensor mounting rod is arranged on the blast furnace at a position lower than the chute at the throat, a radar sensor is vertically arranged on the sensor mounting rod, and a plurality of temperature sensors are arranged on the sensor mounting rod, and the driving mechanism is used to drive the sensor mounting rod to change the detection position in the blast furnace, and can drive the radar sensor to move to the furnace core position. Since the overall material surface is horizontal, the radar sensor is perpendicular to the material surface, which ensures the best measurement effect, so that the material level from the edge to the furnace core in the blast furnace can be measured, and the temperature from the edge to the furnace core can be measured. The signal is transmitted to the dedicated PLC system to realize the screen display, and the dedicated PLC system with integrated function control, the computer control screen is placed in the central control room, and is directly operated by the blast furnace foreman, or set to manual, automatic, positioning detection or swing to the center position detection. Synthesized data screen display.

[0022] 2. Since the sensor mounting rod is hollow and one end of the sensor mounting rod passes through the furnace shell at the furnace throat, cables can be laid inside the sensor mounting rod to facilitate power supply and signal transmission for the radar sensor and temperature sensor.

[0023] 3. Since the sensor mounting rod is hollow, inert gas can be transported to the inside of the sensor mounting rod through the gas source, so as to cool the radar sensor and clean the antenna of the radar sensor. At the same time, it also cools the cables inside the sensor mounting rod, so that the device has a longer service life, ensures the stability of the radar sensor detection effect, and improves the measurement reliability.

[0024] 4. The driving mechanism can drive the sensor mounting rod to deflect and avoid, avoiding the impact caused by material feeding during the material level and temperature measurement process, thus extending the service life of the device and solving the problem of cross temperature measurement hindering material feeding. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0026] Figure 1 The figure is a schematic diagram of installing an embodiment of a vertical scanning radar device with a temperature measurement function for a blast furnace of the present invention on a blast furnace.

[0027] Figure 2 This is a schematic diagram of the distribution of various sensors on the sensor mounting rod in one embodiment of the vertical scanning radar device with temperature measurement function for a blast furnace of the present invention.

[0028] Figure 3 This is a schematic diagram of the position of the sensor mounting rod at the throat of the blast furnace in one embodiment of the vertical scanning radar device with temperature measurement function for the blast furnace of the present invention.

[0029] Figure 4 It is a schematic diagram of the three-dimensional structure of a sensor mounting rod in one embodiment of a vertical scanning radar device with a temperature measurement function for a blast furnace of the present invention.

[0030] Figure 5 The figure is a schematic diagram of the installation of the temperature sensor in one embodiment of the vertical scanning radar device with temperature measurement function for blast furnace of the present invention.

[0031] Figure 6 This is a schematic structural diagram of an air intake pipe connected to a sensor mounting rod in one embodiment of a vertical scanning radar device with a temperature measurement function for a blast furnace of the present invention. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] A vertical scanning radar device with temperature measurement function for blast furnace, see Figures 1 to 6 .

[0034] like Figure 1 As shown, the vertical scanning radar device with temperature measurement function for blast furnace includes a sensor mounting rod 1 and a driving mechanism, wherein the driving mechanism is used to drive the sensor mounting rod 1 to change the detection position in the blast furnace, wherein the sensor mounting rod 1 is arranged on the blast furnace 2 at a position at the throat lower than the chute to prevent the sensor mounting rod 1 from touching the chute when changing the detection position.

[0035] like Figure 2 and Figure 4 As shown, the sensor mounting rod 1 includes an arc-shaped rod portion 11 and a vertical rod portion 12. Figure 3As shown, the arc rod portion 11 is close to the inner wall of the blast furnace, and the shape of the arc rod portion 11 matches the inner wall of the blast furnace 2, that is, the arc rod portion 11 is concentric with the blast furnace 2, so that the arc rod portion 11 can be as close to the inner wall of the blast furnace 2 as possible to avoid contact with environmental factors such as high temperature, high pressure, strong dust, water vapor and blast furnace gas at the core position and be destructively affected and impacted.

[0036] Combination Figure 2 As shown, a radar sensor 5 is provided on the sensor mounting rod 1, and a plurality of temperature sensors 4 are arranged on the sensor mounting rod 1. The radar sensor 5 is arranged at the end position of the arc-shaped rod portion 11, and the temperature sensors 4 are evenly arranged along the arc-shaped rod portion 11. The temperature sensor 4 is used to measure the temperature in the blast furnace, and the radar sensor 5 is used to measure the material level in the furnace.

[0037] The sensor mounting rod 1 is hollow, and one end of the sensor mounting rod 1 passes through the furnace shell at the throat of the blast furnace. In this embodiment, the vertical rod 12 passes through the furnace shell at the throat of the blast furnace. Cables are laid inside the sensor mounting rod 1 to supply power and transmit signals to the radar sensor 5 and the temperature sensor 4.

[0038] Specifically, Figure 5 As shown, an interface 111 for installing the temperature sensor 4 is provided on the lower side of the arc-shaped rod portion 11 , the interface 111 is provided with an internal thread, the temperature sensor 4 is screwed into the interface 111 , and the cable 41 of the temperature sensor 4 passes through the arc-shaped rod portion 11 and comes out from the end of the vertical rod portion 12 .

[0039] The vertical scanning radar device with temperature measurement function for blast furnace also includes a nitrogen gas source, which is used to transport inert gas nitrogen into the sensor mounting rod 1, so as to cool the radar sensor 5 and clean the antenna at the bottom of the radar sensor 5, and also cool the cables inside the sensor mounting rod 1.

[0040] The sensor mounting rod 1 in this embodiment is made of high temperature resistant material, such as a steel rod. Cables, sealing plugs 115 and other components are also made of heat resistant materials. For example, the cable can be made of aluminum-clad Invar core heat-resistant aluminum alloy stranded wire, which can work for a long time in a high temperature environment of 230°C. The top temperature in the furnace is generally 100-200°C, so the wires will not be damaged due to high temperature.

[0041] like Figure 1 As shown, the driving mechanism in this embodiment is an angular stroke driving device 3, which is used to drive the vertical rod 12 to rotate, and the vertical rod 12 further drives the arc rod 11 to swing. During the swinging process of the arc rod 11, it can drive the radar sensor 5 to move to the furnace core position.

[0042] Combination Figure 3As shown, in this embodiment, the arc angle α of the arc rod 11 is about 60 degrees, so that the arc rod 11 can swing to the furnace core position during the swinging process with the vertical rod 12 as the axis. During the working process, the angular stroke driving device 3 drives the vertical rod 12 to swing back and forth, and prevents the arc rod 11 from touching the inner wall of the blast furnace 2.

[0043] like Figure 6 As shown, during the measurement process, the top of the vertical rod 12 of the sensor mounting rod 1 is connected to an air inlet pipe 121, one end of the air inlet pipe 121 is provided with a joint 122 connected to the vertical rod 12, and the other end is provided with a plug 123. The middle of the plug 123 is provided with a hole for the cable bundle 124 to pass through, and sealing glue can be injected between the hole between the cable bundle 124 and the plug 123 to prevent air leakage. A gas connector 1211 is provided on the side of the air inlet pipe 121, and the gas source inputs nitrogen to the sensor mounting rod 1 through the gas connector 1211.

[0044] The invention discloses a method for measuring material level and temperature in a blast furnace.

[0045] The method for measuring the material level and temperature in a blast furnace adopts the vertical scanning radar device with a temperature measurement function for the blast furnace in Example 1. The method drives the sensor mounting rod to change the detection position in the blast furnace through a driving mechanism. The radar sensor and each temperature sensor on the sensor mounting rod detect the material level information and the temperature information at different positions and transmit them to the host computer. The host computer records the information and obtains the material level data and temperature data inside the blast furnace.

[0046] In addition, during the blast furnace production process, inert gas is continuously delivered to the inside of the sensor mounting rod through the gas source, thereby cooling the radar sensor and cleaning the radar sensor antenna. It also cools the cables inside the sensor mounting rod to prevent the radar sensor antenna from being covered with dust and to prevent the radar sensor and cable from overheating and reducing their service life.

[0047] In addition, the driving mechanism can drive the radar sensor on the sensor mounting rod to move to the furnace core position, so that the radar sensor measures the material level at the furnace core position. When adding materials to the blast furnace through the chute, the driving mechanism drives the sensor mounting rod to move to the edge of the blast furnace to avoid falling onto the sensor mounting rod and causing damage.

[0048] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A vertical scanning radar device with temperature measurement function for a blast furnace, characterized in that: include: A sensor mounting rod, which is arranged on the blast furnace at a position lower than the chute at the throat and is arranged horizontally, a radar sensor is arranged on the sensor mounting rod, the radar sensor is perpendicular to the sensor mounting rod, and a plurality of temperature sensors are arranged on the sensor mounting rod, the sensor mounting rod is hollow, and one end of the sensor mounting rod passes through the furnace shell at the throat, and a cable is laid inside the sensor mounting rod for supplying power to the radar sensor and the temperature sensor and transmitting signals; A driving mechanism, the driving mechanism is used to drive the sensor mounting rod from the inner edge of the blast furnace to the furnace core change detection position in the blast furnace; An air source is used to deliver inert gas from the outside to the inside of the sensor mounting rod, so as to cool the radar sensor and clean the antenna of the radar sensor, and also cool the cables inside the sensor mounting rod; The sensor mounting rod comprises an arc-shaped rod portion and a vertical rod portion, wherein the arc-shaped rod portion is close to the inner wall of the blast furnace, and the shape of the arc-shaped rod portion matches the inner wall of the blast furnace; the radar sensor is arranged at the end of the arc-shaped rod portion, and the temperature sensor is arranged along the arc-shaped rod portion; the vertical rod portion passes through the furnace shell at the furnace throat; The driving mechanism is an angular stroke driving device for driving the vertical rod to rotate, and the vertical rod further drives the arc-shaped rod to swing, and the arc-shaped rod can drive the radar sensor to move to the furnace core position during the swinging process.

2. The vertical scanning radar device with temperature measurement function for blast furnace according to claim 1, characterized in that: An interface for installing a temperature sensor is provided on the lower side of the arc-shaped rod.

3. A method for measuring material level and temperature in a blast furnace, characterized in that: Using the vertical scanning radar device with temperature measurement function for a blast furnace according to any one of claims 1 to 2, the method comprises: The sensor mounting rod is driven by the driving mechanism to change the detection position in the blast furnace, and the radar sensor and various temperature sensors on the sensor mounting rod detect the material level information and temperature information at different positions and transmit them to the host computer; During the blast furnace production process, inert gas is continuously delivered to the inside of the sensor mounting rod through the gas source, thereby cooling the radar sensor and cleaning the radar sensor antenna, and also cooling the cables inside the sensor mounting rod.

4. The method for measuring material level and temperature in a blast furnace according to claim 3, characterized in that: The driving mechanism can drive the radar sensor on the sensor mounting rod to move to the furnace core position, so that the radar sensor measures the material level at the furnace core position; when adding materials to the blast furnace through the chute, the driving mechanism drives the sensor mounting rod to move to the edge position of the blast furnace to avoid it.

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