Furnace body state monitoring system based on flash smelting furnace

Abstract

The utility model relates to a furnace body state monitoring system based on a flash smelting furnace. The furnace body state monitoring system comprises a flash smelting furnace, a temperature monitoring mechanism, a displacement monitoring mechanism and an upper computer, the temperature monitoring mechanism comprises a temperature sensing optical cable and an optical fiber temperature measuring device, the temperature sensing optical cable is arranged on the flash smelting furnace, and the optical fiber temperature measuring device is connected with an outlet of the temperature sensing optical cable and is in communication connection with the upper computer; the displacement monitoring mechanism comprises a displacement sensor and a displacement signal collector, the displacement sensor and the displacement signal collector are arranged on the flash smelting furnace, and the displacement signal collector is in communication connection with the upper computer. According to the furnace body state monitoring system provided by the utility model, a technician can remotely monitor the state of the furnace body in real time, so that the monitoring efficiency is improved, and the operation risk of a detector is reduced; the production organization capacity and the treatment capacity of production abnormity are improved, and extreme working conditions are avoided; in addition, long-period stable and efficient operation of the flash smelting furnace is guaranteed, and the service life is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of smelting, in particular to a furnace state monitoring system based on a flash smelting furnace. Background Art

[0002] Flash smelting is a modern direct lead smelting method with advanced technology and mature technique. The flash smelting furnace is the core smelting equipment of the flash smelting method. The smelting method includes two parts: flash furnace oxidation smelting of PbS concentrate and electric furnace reduction of depleted slag. The three processes of traditional lead smelting roasting, blast furnace smelting and slag fuming are combined into one flash smelting furnace.

[0003] During the smelting process of the flash smelting furnace, since the entire smelting process is in a high temperature state, it is necessary to monitor the furnace body state of the flash smelting furnace at any time, such as whether the furnace body is leaking and damaged, whether the furnace body is deformed or tilted, etc., in order to grasp the health status of the furnace body itself, discover the signs of failure as early as possible, and provide early warning and alarm information to avoid problems with the furnace body and cause major personnel and property losses. At the same time, timely discovering problems with the furnace body through monitoring of the furnace body is conducive to the long-term stable and efficient operation of the smelting furnace and prolonging the life of the smelting furnace. However, the current monitoring of the furnace body state of the flash smelting furnace mainly relies on manual monitoring, which not only has the problems of low monitoring efficiency, incomplete monitoring, and inability to monitor in real time, and even leads to extreme working conditions, but also brings certain dangers to the monitoring personnel. Utility Model Content

[0004] The utility model aims to overcome the shortcomings and deficiencies in the prior art and provide a furnace state monitoring system based on a flash smelting furnace.

[0005] The utility model is realized through the following technical scheme: a furnace state monitoring system based on a flash smelting furnace, comprising a flash smelting furnace, a temperature monitoring mechanism, a displacement monitoring mechanism and a host computer; the temperature monitoring mechanism comprises a temperature-sensitive optical cable and an optical fiber temperature measuring device, the temperature-sensitive optical cable is arranged on the flash smelting furnace, the optical fiber temperature measuring device is connected to the lead-out port of the temperature-sensitive optical cable on the one hand, and is communicatively connected to the host computer on the other hand; the displacement monitoring mechanism comprises a displacement sensor and a displacement signal collector, the displacement sensor and the displacement signal collector are arranged on the flash smelting furnace, and the displacement signal collector is communicatively connected to the host computer.

[0006] Compared with the prior art, the furnace body state monitoring system based on the flash smelting furnace described in the utility model, by arranging temperature-sensitive optical cables, displacement sensors and other related devices on the flash smelting furnace, enables process personnel to remotely monitor the furnace body state of the smelting furnace in real time, thereby improving the monitoring efficiency and reducing the operating risks of the detection personnel; at the same time, it improves the production organization ability and the ability to handle production anomalies, and effectively avoids the occurrence of extreme working conditions; in addition, it ensures the long-term stable and efficient operation of the flash smelting furnace, and extends the service life of the flash smelting furnace.

[0007] Furthermore, the optical fiber temperature measuring device includes a laser and a wavelength division multiplexer; the wavelength division multiplexer is provided with a plurality of channel ports, the temperature-sensitive optical cable is connected to two channel ports of the wavelength division multiplexer, the laser generated by the laser passes through the wavelength division multiplexer and enters the temperature-sensitive optical cable from one channel port, and the light wave transmitted from the temperature-sensitive optical cable enters another channel port of the wavelength division multiplexer. The laser is used to generate a beam of laser light and inject it into the temperature-sensitive optical cable for temperature measurement. On the one hand, the wavelength division multiplexer synthesizes the light waves of different wavelengths emitted by the laser into a beam of light, so that as much of the emitted laser light as possible is coupled into the temperature-sensitive optical cable.

[0008] Furthermore, the wavelength division multiplexer includes a thin film interference filter for filtering out light waves of a specific wavelength transmitted by the temperature-sensitive optical cable. According to the backscattering principle of light waves in optical fibers, when light waves propagate in the optical fibers of the temperature-sensitive optical cables, Stokes light and non-Stokes light will be scattered. The thin film interference filter filters these two kinds of light, facilitating subsequent detection and processing of the two kinds of light.

[0009] Furthermore, the optical fiber temperature measurement device further includes a photoelectric converter and a sampling average accumulator, wherein the photoelectric converter is connected to the channel port of the wavelength division multiplexer, and the sampling average accumulator is in communication connection with the photoelectric converter. The photoelectric converter converts the optical signal into an electrical signal, and the sampling average accumulator collects and processes the electrical signal.

[0010] Furthermore, the optical fiber temperature measurement device also includes a synchronous pulse generator, which is electrically connected to the laser and is also in communication connection with the sampling average accumulator. The pulse generator is used to generate pulses with a certain width and repetition frequency, on the one hand to modulate the laser emitted by the laser to obtain a high-power narrow pulse width laser pulse, and on the other hand to send the pulse signal to the sampling average accumulator, so that the sampling average accumulator enters a data storage state.

[0011] Furthermore, the flash smelting furnace includes a reaction tower, a vertical furnace, an electric heating furnace and a molten pool. The vertical furnace and the electric heating furnace are respectively located on both sides of the reaction tower and are connected to each other at the bottom. The bottom connecting part of the reaction tower, the vertical furnace and the electric heating furnace is a furnace bed. The molten pool is located below the furnace bed. The outer wall of the molten pool is provided with a copper water jacket, a graphite brick layer is provided at the bottom of the flash smelting furnace, and a spring structure is provided around the furnace body of the flash smelting furnace.

[0012] Furthermore, the temperature-sensitive optical cable is laid on the graphite brick layer and the surface of the furnace bed and the copper water jacket. The temperature-sensitive optical cable is laid at the position where the temperature of the flash smelting furnace needs to be monitored, so as to monitor whether there is leakage in the important position of the flash smelting furnace in real time.

[0013] Furthermore, a displacement sensor bracket is provided on the spring structure, and the displacement sensor is mounted on the displacement sensor bracket. The displacement sensor is mounted on the spring structure through the displacement sensor bracket.

[0014] Furthermore, the host computer includes a demodulator, an alarm and a furnace state data collector. The demodulator demodulates the data transmitted from the sampling average accumulator into temperature, position and alarm information, the alarm is used to send an alarm signal, and the furnace state data collector is used to convert the displacement change of the displacement sensor transmitted from the displacement signal collector into the displacement change of the flash smelting furnace.

[0015] Furthermore, a DCS platform is also included, and the DCS platform is connected to the host computer for unified monitoring of the furnace state information transmitted by the temperature monitoring mechanism and the displacement monitoring mechanism and centralized issuance of control instructions, thereby achieving real-time and timely monitoring of the flash smelting furnace.

[0016] In order to better understand and implement the present invention, the present invention is described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of a furnace state monitoring system of a flash smelting furnace in an embodiment of the utility model;

[0018] Figure 2 It is a schematic structural diagram of a flash smelting furnace in an embodiment of the utility model;

[0019] Figure 3 It is a schematic diagram of a temperature monitoring mechanism for a flash smelting furnace in an embodiment of the utility model;

[0020] Figure 4 This is a distribution diagram of temperature-sensitive optical cables laid at the graphite brick layer at the bottom of the flash smelting furnace in the embodiment of the utility model;

[0021] Figure 5 It is a left side view of the flash smelting furnace in the embodiment of the utility model;

[0022] Figure 6 Schematic diagram of a displacement sensor in an embodiment of the utility model. DETAILED DESCRIPTION

[0023] When the container of the object to be tested contains high-temperature material and there is an obvious temperature gradient with the surrounding environment, when the material leaks, the leakage port (or crack) will release heat to the surrounding environment, and then the abnormal increase in the temperature of the leakage port (or crack) is measured to determine whether the pipeline is leaking. The flash smelting furnace is a high-temperature smelting furnace. When it is damaged and leaks, the temperature around the leakage port (or crack) will rise sharply, and when the furnace shell is damaged, the temperature of the copper water jacket will also rise accordingly. In addition, by using a displacement sensor to monitor the displacement change of the furnace body in real time, the deformation and tilt state of the furnace body can be determined, providing a real-time monitoring basis for the health of the furnace body structure. Based on this, the utility model proposes a furnace state monitoring system based on a flash smelting furnace. The specific implementation method of the utility model will be described in detail through an embodiment below:

[0024] See also Figure 1 The furnace state monitoring system based on the flash smelting furnace of the utility model comprises a flash smelting furnace 10, a temperature monitoring mechanism 20, a displacement monitoring mechanism 30, a host computer and a DCS platform.

[0025] See also Figure 2 The flash smelting furnace 10 includes a reaction tower 11, a vertical furnace 12, an electric furnace 13 and a molten pool 14. The vertical furnace 12 and the electric furnace 13 are respectively located on both sides of the reaction tower 11 and are connected at the bottom. The bottom of the reaction tower 11, the vertical furnace 12 and the electric furnace 13 are connected to each other as a furnace bed. The molten pool 14 is located below the furnace bed and is connected to the furnace bed. A graphite brick layer 15 is provided at the bottom of the flash smelting furnace 10. The graphite brick layer 15 is formed by laying a plurality of graphite bricks. A copper water jacket 16 is provided on the outer wall of the molten pool 14. In addition, in order to adjust the change in the expansion of the furnace body caused by the increase and decrease of temperature during the production process and control the deformation of the furnace body, a plurality of spring structures 17 are provided around the furnace body of the flash smelting furnace 10.

[0026] See also Figure 3 The temperature monitoring mechanism 20 includes an optical fiber temperature measuring device 21 and a temperature sensing optical cable 22. The outlet of the temperature sensing optical cable 22 is connected to the optical fiber temperature measuring device 21, and the optical fiber temperature measuring device 21 is connected to the host computer for communication.

[0027] The optical fiber temperature measuring device 21 includes a synchronous pulse generator 211 , a laser 212 , a wavelength division multiplexer 213 , a photoelectric converter 214 and a sampling average accumulator 215 .

[0028] The synchronous pulse generator 211 is used to generate pulses with a certain width and repetition frequency.

[0029] The laser 212 is used to generate a beam of laser light. The laser 212 is electrically connected to the synchronous pulse generator 211. The pulse emitted by the synchronous pulse generator 211 modulates the laser light generated by the laser 221 into a laser pulse with high power and narrow pulse width.

[0030] The wavelength division multiplexer 213 integrates multiple lenses and a thin film interference filter, and the wavelength division multiplexer 213 is provided with multiple channel ports. The laser light emitted by the laser 212 enters the wavelength division multiplexer 213 from one of the channel ports. The multiple lenses in the wavelength division multiplexer 213 allow the laser light emitted by the laser 212 to be coupled into the temperature-sensitive optical cable 22 as much as possible. The thin film interference filter in the wavelength division multiplexer 213 is used to filter the light waves transmitted from the temperature-sensitive optical cable to filter out light waves of different wavelengths.

[0031] There are multiple temperature-sensitive optical cables 22, and the multiple temperature-sensitive optical cables 22 are distributed and laid on the graphite brick layer 15, the furnace bed and the copper water jacket 16. Figure 4, seven temperature-sensitive optical cables 22 are laid at intervals on the graphite brick layer 15, and the two ports of each temperature-sensitive optical cable 22 are led to the same side of the graphite brick layer 15, and the cable of the temperature-sensitive optical cable 22 is wound in the joint seam of the graphite brick layer 15 in a rectangular shape, and the width of the rectangle is the width of three or four graphite bricks. The two ports of each temperature-sensitive optical cable 22 are led out of the flash smelting furnace 10 through a thermocouple and a section of the temperature-sensitive optical cable 22, and the seven temperature-sensitive optical cables 22 are alternately fused and connected in series outside the flash smelting furnace 10, and the two ends after fusion and series connection are respectively led to the wavelength division multiplexer 213 through a section of the temperature-sensitive optical cable 22 and are connected to the two channel ports of the wavelength division multiplexer 213. Among them, some graphite bricks of the graphite brick layer 15 need to be grooved to reserve the laying space of the temperature-sensitive optical cable 22. At the same time, in order to avoid the temperature-sensitive optical cable 22 from being directly subjected to pressure, some graphite bricks need to be chamfered, and the chamfered part is used for laying the temperature-sensitive optical cable 22. For the laying of the large-area furnace bed and the copper water jacket 16, the temperature-sensitive optical cable 22 is pasted back and forth on the furnace bed and the outer surface of the copper water jacket in an "S-shape" to increase the sensitivity to the heat leakage of the furnace body. Similarly, the lead-out ports at both ends of the temperature-sensitive optical cable 22 at the furnace bed and the copper water jacket 16 are led to the two channel ports of the wavelength division multiplexer 213 and are connected to each other. One channel port is used to inject the laser pulse into the temperature-sensitive optical cable 22, and the other channel port is used to transmit the light wave transmitted from the temperature-sensitive optical cable 22 to the thin-film interference filter in the wavelength division multiplexer 213 for filtering.

[0032] Furthermore, the temperature-sensitive optical cable 22 includes a temperature-sensitive optical fiber at the center and a protective layer arranged outside the temperature-sensitive optical fiber, and the protective layer is used to protect the temperature-sensitive optical fiber. Different temperature-sensitive optical cables are selected according to different monitoring environments. Since the temperature of the furnace bottom and the furnace bed is relatively high, the temperature-sensitive optical cable 22 laid on the graphite brick layer 15 and the furnace bed is selected as a double-core high-temperature armored temperature-sensitive optical cable that can withstand a long-term temperature of 300°C and a short-term temperature of 350°C. The temperature-sensitive optical fiber of the double-core high-temperature armored temperature-sensitive optical cable is a high-temperature optical fiber with a polyimide coating on the outer layer. The protective layer of the double-core high-temperature armored temperature-sensitive optical cable is composed of a stainless steel seamless tube and a stainless steel wire stranded wire. The stainless steel seamless tube is sleeved outside the temperature-sensitive optical fiber, and the stainless steel wire stranded wire is stranded outside the stainless steel seamless tube. The double-core high-temperature armored temperature-sensitive optical cable has excellent high-temperature resistance, mechanical properties, high tensile strength, compression resistance, waterproofness, and anti-gunfire advantages, and is suitable for use in various harsh environments. Since the temperature of the copper water jacket 16 is relatively low, the temperature-sensitive optical cable 22 laid on the copper water jacket 16 is selected as a weather-resistant armored temperature-sensitive optical cable. The temperature-sensitive optical fiber of the weather-resistant armored temperature-sensitive optical cable is a circular gradient refraction multimode optical fiber with an outer layer coated with an acrylate coating. The protective layers of the weather-resistant armored temperature-sensitive optical cable include Kevlar fiber, stainless steel hose, stainless steel braided mesh and flame-retardant outer sheath from the inside to the outside. The weather-resistant armored temperature-sensitive optical cable has good flame retardant, anti-static and high temperature resistance properties.

[0033] Furthermore, the basic principle of using the temperature-sensitive optical fiber for temperature measurement is as follows: using a temperature-sensitive optical fiber as a temperature information transmission medium, firstly, after emitting a laser pulse into the temperature-sensitive optical fiber, because the microscopic characteristics of the optical fiber are affected by the external temperature, each individual point in the optical fiber will backscatter a small part of the light. There is a kind of Raman light in this part of the light, which contains two components: Stokes light and anti-Stokes light. Among them, Stokes light is independent of temperature, while the intensity of anti-Stokes light is proportional to the degree of influence of temperature on the optical fiber. From the quantitative relationship between the ratio of anti-Stokes light to Stokes light and temperature, the temperature value T can be obtained:

[0034]

[0035] Where: h is Planck coefficient (J·S), k is Boltzmann constant (J / K), I S is the Stokes light intensity, I AS is the non-Stokes light intensity; f0 is the frequency of the accompanying light (1 / S); Δf is the Raman light frequency increment (1 / S), and K is the absolute temperature.

[0036] The time difference Δt between the incident light and the backscattered light and the light propagation speed C in the optical fiber are used to calculate the k , the distance X from the incident end to the position of different scattering points can be calculatedi , so that we can get an almost continuous temperature distribution along the fiber, X i It can be calculated as follows:

[0037]

[0038] Where: C k is the light propagation speed in the optical fiber (m / s), Δt i is the backscattering delay time (s).

[0039] Laser pulses of a certain energy and width are injected into the temperature-sensitive optical fiber. When the pulsed laser is transmitted in the optical fiber, it continuously generates back Raman scattering, i.e., anti-Stokes light and Stokes light. The intensity of the back anti-Stokes light will be affected by the temperature of the scattering point of the optical fiber and change. The temperature distribution is obtained by demodulating the intensity of the back anti-Stokes light, and the information is located by the transmission speed of the light wave in the temperature-sensitive optical fiber and the time of the back light echo, so as to obtain the position of the leakage point.

[0040] Therefore, the thin film interference filter in the wavelength division multiplexer 213 is used to filter out the two wavelengths of light, Stokes and anti-Stokes, transmitted from the temperature sensitive optical fiber.

[0041] Furthermore, the Stokes light and anti-Stokes light respectively filtered out by the thin film interference filter are outputted through the other two channel ports of the wavelength division multiplexer 213, and respectively enter the photoelectric converter 214, and the photoelectric converter 214 is used to convert the light wave signal filtered out by the wavelength division multiplexer 213 into an electrical signal and amplify it, so as to facilitate the subsequent electrical signal processing. In this embodiment, the photoelectric converter 214 is composed of a photodetector and an amplifier, and the photodetector 214 is preferably an avalanche diode with internal gain, and the amplifier is composed of multiple stages and has the characteristics of broadband, high gain, and low noise.

[0042] Furthermore, the sampling average accumulator 215 is communicatively connected to the synchronization pulse generator 211 on the one hand, and is communicatively connected to the photoelectric converter 214 on the other hand. The sampling average accumulator 215 is used to collect and store the electrical signal converted by the photoelectric converter 214, and then perform averaging processing. The sampling average accumulator 215 should have a high data collection speed and collection bit number so as to effectively perform data accumulation and averaging processing.

[0043] Furthermore, the average accumulator 215 is connected to the host computer in communication at the same time. The host computer is provided with a demodulator and an alarm. The demodulator demodulates the temperature and position information of the data processed by the sample average accumulator 215. At the same time, the host computer is connected to the DCS platform in communication, and the information demodulated by the demodulator is transmitted to the DCS platform. The customer can monitor the temperature change and the position information of each position of the flash smelting furnace 10 in real time from the DCS platform. The alarm is connected to the demodulator in communication. The alarm is provided with a variety of alarm types, such as the highest temperature alarm, the temperature rise rate alarm, the highest temperature and the average temperature difference alarm, the optical fiber damage alarm, the temperature measuring device abnormal alarm, etc. When any of the alarm types occurs at the monitored position, the alarm will send an alarm signal. The alarm signal sent by the alarm is transmitted to the DCS platform, and the DCS platform can centrally and uniformly remind relevant personnel by sending alarm short messages or issuing alarms that meet industrial standards.

[0044] The specific working process is as follows: by controlling the synchronization pulse generator 211 to generate pulses with a certain frequency, the pulses modulate the laser 212 on the one hand, so that the laser 212 generates a series of high-power narrow-pulse-width laser pulses, and at the same time provide a synchronization pulse signal to the sampling average accumulator 215, so that the sampling average accumulator 215 enters the data acquisition state. The laser pulse enters the temperature-sensitive optical fiber of the temperature-sensitive optical cable 22 through the wavelength division multiplexer 213, and generates backscattered light at each point in the temperature-sensitive optical fiber. The backscattered light is transmitted from the other end of the temperature-sensitive optical fiber and enters the wavelength division multiplexer 213. The backscattered light is filtered out of Stokes light and anti-Stokes light respectively through the thin film interference filter in the wavelength division multiplexer 213, and is output through the other two channel ports of the wavelength division multiplexer 213 and enters the photoelectric converter 214. The photoelectric converter 214 converts the weak optical signal into an electrical signal and amplifies the electrical signal to the effective collection range of the sampling average accumulator 215. Next, the sampling average accumulator 215 collects and stores the electrical signal transmitted by the photoelectric converter 214, generates a fiber temperature curve, and waits for the electrical signal of the scattered light generated by the subsequent laser pulse to be accumulated and averaged and other data processing. Finally, the processed data is transmitted to the host computer, where the demodulator demodulates the data to obtain the temperature and temperature change of the monitored position and its change position, and finally transmits the data to the DCS platform through communication, and displays the temperature change of the furnace bottom, furnace bed and copper water jacket of the flash smelting furnace in real time on the display of the DCS platform so that customers can read it at any time. When the temperature is abnormal, the position of the abnormal point can be known at any time through the display and the relevant personnel can be given corresponding instructions in time, so as to effectively avoid the accelerated damage of the furnace body caused by the failure to timely discover the leakage problem of the furnace body, thereby increasing the service life of the furnace body.

[0045] Please also see Figure 5 and Figure 6 The displacement monitoring mechanism 30 includes a plurality of displacement sensors 31 and a plurality of displacement signal collectors (not shown). Each of the displacement sensors 31 is fixed on a displacement sensor bracket 32, and the displacement sensor bracket 22 is fixedly mounted on the spring structure 17 of the flash smelting furnace 10 by welding.

[0046] The displacement sensor 31 includes a body 311, a probe 312, a reset spring 313 and a contact 314. The body 311 is a hollow cylinder and one end of which is mounted on the displacement sensor bracket 32 ​​through a mounting nut with a circular hole in the center. The probe 312 is a cylinder and its diameter is smaller than the diameter of the body 311. One end of the probe 312 is inserted into the body 311 through the central circular hole of the mounting nut. The reset spring 313 is sleeved on the probe 312 outside the body 311. The length of the reset spring 313 in the free state is the same as the length of the probe 312 outside the body 311. The contact 314 is arranged at the end of the probe 312, and the contact 314 abuts against the object to be measured. When the position of the object to be measured changes, the position of the probe 312 in the body 311 will also change, and the reset spring 313 will also be compressed or restored to a free state. The displacement signal collector is installed near the furnace body, and a power line and a signal line are provided at one end of the displacement sensor 31 away from the contact 314, and the displacement signal collector is connected to the displacement sensor 31 through the signal line. The displacement signal collector is connected to the host computer in communication, and the host computer is provided with a furnace state data collector. The displacement signal collector transmits the collected data to the furnace state data collector, and the furnace state data collector converts the displacement of the displacement sensor 31 into a change in the furnace state. The host computer then transmits the furnace state change data to the DCS platform, and the customer can monitor the furnace state in real time on the DCS platform.

[0047] In this embodiment, the plurality of displacement sensors 31 are reset type displacement sensors, 64 in total, 32 of which are arranged on the horizontal spring structure 17 of the side wall of the molten pool, 8 on the horizontal spring structure 17 of the furnace bed at the end of the electric heating furnace, 8 on the horizontal spring structure 17 of the furnace bed at the end of the vertical furnace, and 16 on the spring structure 17 of the furnace roof of the electric heating furnace, respectively used to monitor the horizontal displacement of the side wall of the molten pool, the horizontal displacement of the furnace bed at the end of the electric heating furnace, the horizontal displacement of the furnace bed at the end of the vertical furnace, and the displacement of the furnace roof of the electric heating furnace. The displacement signal collector is 16 data collectors, four in total, two of which are used to collect displacement signals of the 32 displacement sensors 31 installed on the horizontal spring structure of the side wall of the molten pool, one of which is used to collect displacement signals of the 16 displacement sensors 31 installed on the horizontal spring structure of the furnace bed at the end of the electric heating furnace and the horizontal spring structure of the furnace bed at the end of the vertical furnace, and one of which is used to collect displacement signals of the 16 displacement sensors 31 installed on the spring structure of the furnace roof of the electric heating furnace.

[0048] The specific working process is as follows: the displacement sensor 31 is installed on the spring structure 17 through the displacement sensor mounting frame 32, and the contact 314 of the displacement sensor 31 is in contact with the furnace body of the flash smelting furnace 10. When the furnace body of the flash smelting furnace 10 is tilted or deformed, some of the contacts of the displacement sensors 31 are subjected to force so that the probe 312 is pushed into the body 311, and the reset spring 313 is compressed. The displacement signal collector detects the changes of the probe 312 and the reset spring 313, and transmits the change data to the host computer. The furnace state data collector in the host computer processes the data collected by each displacement signal collector and converts it into furnace state change data. The host computer then communicates the furnace change data to the DCS platform. Relevant staff can monitor the furnace state changes in real time from the DCS platform, and can make corresponding instructions to the workshop staff in a unified manner according to the changes. When the furnace body of the flash smelting furnace is deformed or tilted, the DCS platform can promptly notify relevant workshop staff to carry out corresponding processing, thereby ensuring the long-term high-efficiency operation of the flash smelting furnace at a high temperature.

[0049] In actual application, the monitoring system based on the furnace state of the flash smelting furnace can realize accurate monitoring of the furnace condition of the flash smelting furnace. The perception coverage of key control data of the flash smelting furnace process reaches 95%, and the coverage of temperature perception and displacement monitoring elements reaches 95%, which meets the stable control of the flash smelting furnace under multi-phase, multi-field and variable operating conditions.

[0050] Compared with the existing technology, the monitoring system based on the status of the flash smelting furnace body lays temperature-sensitive optical cables on the bottom and hearth of the flash smelting furnace and the copper water jacket, and uses the principle of back Raman scattering of light to detect temperature. The change in temperature can be used to reflect whether the flash smelting furnace is damaged and leaks are caused. The leakage point can be accurately located and an alarm message can be generated. The acquired temperature, temperature change position and alarm information can be transmitted to the DCS platform. At the same time, a displacement sensor is set on the furnace body to detect the displacement of the furnace body in real time and transmit the displacement of the furnace body to the DCS platform in real time. The monitoring system allows monitoring personnel to stay away from the workshop site and monitor the furnace status of the smelting furnace remotely and intelligently in real time online through the DCS platform, reducing the operational risks caused by uncertain factors on site, reducing the workload of regular manual inspections of the smelting furnace, and greatly improving the on-site working environment; at the same time, the unified monitoring of the furnace status and the centralized issuance of control instructions through the DCS platform greatly improve the production organization ability and the ability to handle production anomalies, effectively avoiding the occurrence of extreme situations and reducing the incidence of process failures; in addition, it effectively solves the problem of unstable operation of the flash smelting furnace caused by changes in the furnace status, ensuring the long-term stable and efficient operation of the flash smelting furnace and extending the service life of the furnace.

[0051] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, and the utility model is also intended to include these modifications and modifications.

Claims

1. A furnace state monitoring system based on a flash smelting furnace, characterized in that: It includes a flash smelting furnace, a temperature monitoring mechanism, a displacement monitoring mechanism and a host computer; the temperature monitoring mechanism includes a temperature-sensitive optical cable and an optical fiber temperature measuring device, the temperature-sensitive optical cable is arranged on the flash smelting furnace, the optical fiber temperature measuring device is connected to the lead-out port of the temperature-sensitive optical cable on the one hand, and is communicatively connected to the host computer on the other hand; the displacement monitoring mechanism includes a displacement sensor and a displacement signal collector, the displacement sensor and the displacement signal collector are arranged on the flash smelting furnace, and the displacement signal collector is communicatively connected to the host computer.

2. The furnace state monitoring system based on a flash smelting furnace according to claim 1, characterized in that: The optical fiber temperature measuring device includes a laser and a wavelength division multiplexer; the wavelength division multiplexer is provided with a plurality of channel ports, the temperature-sensitive optical cable is connected to two channel ports of the wavelength division multiplexer, the laser generated by the laser passes through the wavelength division multiplexer and enters the temperature-sensitive optical cable from one channel port, and the light wave transmitted from the temperature-sensitive optical cable enters another channel port of the wavelength division multiplexer.

3. The furnace state monitoring system based on the flash smelting furnace according to claim 2 is characterized in that: The wavelength division multiplexer includes a thin film interference filter for filtering out light waves of a specific wavelength transmitted by the temperature sensitive optical cable.

4. The furnace state monitoring system based on the flash smelting furnace according to claim 3 is characterized in that: The optical fiber temperature measuring device also includes a photoelectric converter and a sampling average accumulator. The photoelectric converter is connected to the channel port of the wavelength division multiplexer, and the sampling average accumulator is communicatively connected to the photoelectric converter.

5. The furnace state monitoring system based on the flash smelting furnace according to claim 4 is characterized in that: The optical fiber temperature measuring device also includes a synchronous pulse generator, which is electrically connected to the laser and is also communicatively connected to the sampling average accumulator.

6. The furnace state monitoring system based on the flash smelting furnace according to claim 5 is characterized in that: The flash smelting furnace comprises a reaction tower, a vertical furnace, an electric heating furnace and a molten pool. The vertical furnace and the electric heating furnace are respectively located on both sides of the reaction tower and are interconnected at the bottom. The interconnected bottom of the reaction tower, the vertical furnace and the electric heating furnace is a furnace bed. The molten pool is located below the furnace bed. A copper water jacket is provided on the outer wall of the molten pool. A graphite brick layer is provided at the bottom of the flash smelting furnace. A spring structure is provided around the furnace body of the flash smelting furnace.

7. The furnace state monitoring system based on a flash smelting furnace according to claim 6, characterized in that: The temperature-sensitive optical cable is laid on the graphite brick layer and on the surface of the furnace bed and the copper water jacket.

8. The furnace state monitoring system based on a flash smelting furnace according to claim 7, characterized in that: A displacement sensor bracket is provided on the spring structure, and the displacement sensor is installed on the displacement sensor bracket.

9. The furnace state monitoring system based on the flash smelting furnace according to claim 8, characterized in that: The host computer includes a demodulator, an alarm and a furnace state data collector.

10. The furnace state monitoring system based on a flash smelting furnace according to claim 9, characterized in that: It also includes a DCS platform, which is communicatively connected with the host computer.

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