A high-temperature probe-based heat supply regulation system for a smelting furnace
By combining high-temperature probe monitoring and heating control module, the problem of uneven temperature and distribution in the molten pool in oxygen-enriched bottom blowing smelting technology is solved, achieving the effects of uniform molten slurry stirring, low energy consumption, high yield and low carbon emissions.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- YUNNAN AGRICULTURAL UNIVERSITY
- Filing Date
- 2022-07-21
- Publication Date
- 2026-06-02
AI Technical Summary
Existing oxygen-enriched bottom-blown smelting technology cannot accurately determine the temperature of the molten pool and the distribution of the molten liquid, resulting in problems such as uneven product quality, severe splashing, short lifespan, and high energy consumption.
A high-temperature probe is used to monitor the temperature and density information inside the melting furnace, and the stirring rate is controlled by the heating control module. Combined with gas injection and furnace water jacket control, the melting process is controlled to achieve all-round stirring and temperature uniformity without dead angles.
This method achieves thorough mixing of the molten slurry, reduces splash height, improves heat transfer efficiency, reduces energy consumption, increases yield and economic benefits, and simultaneously reduces carbon emissions.
Smart Images
Figure CN115388649B_ABST
Abstract
Description
Technical Field
[0001] This invention belongs to the field of energy conservation and emission reduction, and in particular relates to a heating control system for a smelting furnace based on a high-temperature probe. Background Technology
[0002] Energy is an indispensable material foundation for global human survival, social progress, and economic development. Energy issues have always been a focal point and a hot topic in economic development. A correct understanding and handling of the problems that arise during energy consumption is of great significance for the long-term healthy development of my country's economy and society.
[0003] Oxygen-enriched molten pool smelting technology involves directly blowing gas into the molten pool to achieve rapid heat and mass transfer between the three phases. Its key lies in promoting a rapid and complete slag-forming reaction. In recent years, oxygen-enriched molten pool smelting technology has shown good development momentum, while oxygen-enriched bottom-blowing smelting technology has lagged behind, accounting for the smallest share of production capacity. This is determined by its process characteristics. Simple bottom-blowing stirring cannot reveal the molten pool temperature and melt distribution, affecting product quality and causing uneven solution distribution, severe splashing, short lifespan, insufficient utilization, and high energy consumption. Summary of the Invention
[0004] The purpose of this invention is to provide a heating control system for a smelting furnace based on a high-temperature probe, so as to solve the problems existing in the prior art.
[0005] To achieve the above objectives, the present invention provides a heating control system for a smelting furnace based on a high-temperature probe, comprising: a raw material stirring module, an information acquisition module, and a heating control module, wherein the raw material stirring module, the information acquisition module, and the heating control module are connected in sequence.
[0006] The raw material stirring module is used to stir and melt raw materials, which are distributed inside the melting furnace;
[0007] The information acquisition module acquires smelting information inside the smelting furnace based on a high-temperature probe; wherein the high-temperature probe is installed on the inner wall of the smelting furnace.
[0008] The heating control module adjusts the stirring rate of the smelting raw materials based on the smelting information.
[0009] Preferably, the raw material mixing module includes a raw material adding unit and a gas injection unit;
[0010] The raw material adding unit is used to add smelting raw materials into the smelting furnace;
[0011] The gas injection unit is used to inject oxygen-enriched air into the smelting furnace and stir the smelting raw materials through the oxygen-enriched air.
[0012] Preferably, the gas injection unit uses a bubble generator to inject the oxygen-enriched air, and the bubble generator is installed outside the smelting furnace.
[0013] Preferably, the information acquisition module includes a temperature acquisition unit and a density acquisition unit;
[0014] The temperature acquisition unit acquires temperature information inside the smelting furnace based on a high-temperature probe.
[0015] The density acquisition unit acquires density information inside the smelting furnace based on a high-temperature probe.
[0016] Preferably, the temperature acquisition unit uses a thermocouple sensor to monitor the temperature information, and the thermocouple sensor is installed on the inner wall of the melting furnace.
[0017] Preferably, the heating control module includes an information transmission unit and a rate control unit;
[0018] The information transmission unit is used to transmit smelting information, which includes the temperature information and the density information;
[0019] The rate control unit is used to receive the smelting information and, based on the smelting information, control the stirring rate of the smelting raw materials.
[0020] Preferably, the information transmission unit uses an image acquisition system to transmit the smelting information to the rate control unit.
[0021] Preferably, it also includes a furnace water jacket, which is used to regulate the temperature inside the smelting furnace.
[0022] Preferably, it further includes a flue gas treatment module, which is used to treat the flue gas generated during the stirring and smelting of raw materials.
[0023] The technical effects of this invention are as follows:
[0024] This invention uses a raw material stirring module to stir and melt raw materials, which can achieve thorough stirring of the molten slurry, promote the floating of inclusions, and achieve uniform temperature and composition; the stirring area is expanded, the splash height is reduced, and the heat transfer efficiency is improved; it overcomes the technical problems of severe splashing of the molten pool, insufficient utilization of oxygen enrichment, and difficulty in large-scale production.
[0025] This invention acquires smelting information within the furnace through an information acquisition module, and monitors the density of the molten slurry surface from all angles using a high-temperature probe. By regulating the stirring rate of the smelting raw materials through a heating control module, it ultimately achieves advantages such as low slag heavy metal content, uniform furnace temperature, high yield, low energy consumption, high economic benefits, and reduced carbon emissions. Attached Figure Description
[0026] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:
[0027] Figure 1 This is a schematic diagram of the system in an embodiment of the present invention;
[0028] Among them, 1-chimney; 2-feed inlet; 3-high temperature probe control robot; 4-furnace water jacket; 5-thermocouple sensor; 6-slag outlet; 7-bubble generator; 8-check valve; 9-slurry outlet; 10-furnace body; 11-filter screen; 12-adsorption plate; 13-image acquisition system; 14-resistivity tomography imaging system; 15-chaos controller; 16-computer. Detailed Implementation
[0029] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.
[0030] Example 1
[0031] like Figure 1 As shown, this embodiment provides a heating control system for a smelting furnace based on a high-temperature probe, including: a raw material stirring module, an information acquisition module, and a heating control module, wherein the raw material stirring module, the information acquisition module, and the heating control module are connected in sequence;
[0032] The raw material stirring module is used to stir the smelting raw materials, which are distributed inside the smelting furnace;
[0033] The information acquisition module acquires smelting information inside the smelting furnace based on a high-temperature probe; the high-temperature probe is installed on the inner wall of the smelting furnace.
[0034] The heating control module regulates the stirring rate of the smelting raw materials based on smelting information.
[0035] In some embodiments, the raw material stirring module includes a raw material adding unit and a gas injection unit; the raw material adding unit is used to add smelting raw materials into the smelting furnace; the gas injection unit is used to inject oxygen-enriched air into the smelting furnace to stir the smelting raw materials by means of oxygen-enriched air.
[0036] In some embodiments, the gas injection unit uses a bubble generator to inject oxygen-enriched air, and the bubble generator is installed outside the smelting furnace.
[0037] In some embodiments, the information acquisition module includes a temperature acquisition unit and a density acquisition unit; the temperature acquisition unit acquires temperature information inside the smelting furnace based on a high-temperature probe; the density acquisition unit acquires density information inside the smelting furnace based on a high-temperature probe.
[0038] In some embodiments, the temperature acquisition unit uses a thermocouple sensor to monitor temperature information, and the thermocouple sensor is installed on the inner wall of the melting furnace.
[0039] In some embodiments, the heating control module includes an information transmission unit and a rate control unit; the information transmission unit is used to transmit smelting information, which includes temperature information and density information; the rate control unit is used to receive the smelting information and, based on the smelting information, control the stirring rate of the smelting raw materials.
[0040] In some embodiments, the information transmission unit uses an image acquisition system to transmit smelting information to the rate control unit.
[0041] In some embodiments, a furnace water jacket is also included, which is used to regulate the temperature inside the smelting furnace.
[0042] In some embodiments, the system further includes a flue gas treatment module for treating the flue gas generated during the stirring and smelting of raw materials.
[0043] This embodiment provides a robot for controlling an enhanced heating system in a metallurgical furnace, which mainly includes: a chimney 1, a feed inlet 2, a high-temperature probe control robot 3, a furnace water jacket 4, a thermocouple sensor 5, a slag outlet 6, a bubble generator 7, a check valve 8, a slurry outlet 9, a furnace body 10, a filter screen 11, an adsorption plate 12, an image acquisition system 13, a resistivity tomography imaging system 14, a chaos controller 15, and a computer 16.
[0044] A chimney 1 is located at the top of the furnace body 10. Feed inlets are located on both sides of the chimney. High-temperature probe control robots 3 are installed around the perimeter of the feed inlets. A furnace water jacket 4 is located below the high-temperature probe control robots 3. A thermocouple sensor 5 is installed directly below the furnace water jacket 4. A slag outlet 6 is located at the bottom of one side of the furnace body 10. A slurry outlet 9 is located on the opposite side of the slag outlet 6. A bubble generator 7 is located at the bottom of the furnace body 10. The bubble generator 7 is connected to a check valve 8. A filter screen 11 and an adsorption plate 12 are installed inside the chimney 1. An image acquisition system 13, a resistance tomography system 14, and a chaos controller 15 are installed outside the furnace body 10. The image acquisition system 13 and the chaos controller 15 are connected to the high-temperature probe control robots 3. The thermocouple sensor 5 is connected to the resistance tomography system 14. The image acquisition system 13, the resistance tomography system 14, and the chaos controller 15 are all connected to a computer 16.
[0045] The top of the furnace body has a chimney 1, and several filter screens 11 and adsorption plates 12 are installed inside the chimney. The filter screens 11 are located on the upper side, and the adsorption plates 12 are located on the lower side.
[0046] The chimney 1 has feed inlets 2 on both sides. The top of the feed inlet 2 has a slide rail. A slide door is slidably connected to the slide rail at the top of the feed inlet 2. The slide door is detachably connected to the feed inlet. A high temperature probe control robot 3 is located diagonally below the feed inlet. The high temperature probe control robot 3 is distributed around the furnace body. The furnace body is equipped with a water jacket around its perimeter. Additives are contained in the furnace body water jacket 4.
[0047] Thermocouple sensors 5 are installed around the furnace body, and the thermocouple sensors 5 transmit the data to the computer 16 through the resistance tomography imaging system 14.
[0048] The slag outlet 6 is located on one side of the furnace body side wall. There is a slide rail on the top of the slag outlet 6. A slide door is slidably connected to the slide rail on the top of the feed inlet 2. The slide door is detachably connected to the slag outlet 6. The slag outlet 6 discharges waste slag with very low metal content from the furnace body.
[0049] The bubble generator 7 is located at the bottom of the furnace body. The bubble generator 7 is controlled by the computer 16 to fully stir the molten slurry in the furnace body. The check valve 8 is connected to multiple bubble generators 7 and prevents the molten slurry from flowing back.
[0050] The image acquisition system 13, the resistance tomography system 14, and the chaos controller 15 are distributed outside the furnace body. The high-temperature probe control robot 3 combines the observed situation with the chaotic theory set in the image acquisition system 13 and the computer 16. The thermocouple sensor 5 combines the temperature situation with the resistance tomography system 14 and the computer 16, so that the computer 16 can control the gas flow of the bubble generator 7 at the bottom of the furnace body.
[0051] The high-temperature probe control robot 3 can monitor the stirring situation from all angles without blind spots. It is made of 316L stainless steel, a high-temperature resistant material, and is suitable for temperatures ranging from -200℃ to 1470℃. The high-temperature probe control robot 3 is combined with the chaos theory in the chaos controller 15 and computer 16 to regulate the stirring situation in the furnace, enabling it to make corresponding actions quickly and accurately.
[0052] Thermocouple sensor 5 is combined with resistive tomography system 14 to transmit the temperature information inside furnace 10 to computer 16.
[0053] The chaos theory uniformity evaluation program in computer 16 is used to regulate the bubble generator 7 at the bottom of furnace body 10.
[0054] In this embodiment, the working principle of the enhanced heating system control robot is as follows: Raw materials are loaded into the molten pool furnace through the feed inlet 2. The bubble generator 7 agitates the molten lava in the furnace by spraying oxygen-enriched air. In order to make the molten lava uniformly stirred, with small splash amplitude and low energy consumption, the temperature and density information of the surface of the molten lava collected by the robot 3 is transmitted to the computer 16 through the image acquisition system 13 via the high temperature probe above the furnace body. Thermocouple sensor 5 monitors the temperature inside the furnace in real time and transmits the temperature information to the computer 16 through the resistance tomography imaging system 14. The computer 16 controls the spray rate of the bubble generator 7 through the pre-set chaos theory evaluation index program. In order to maintain a constant temperature inside the furnace and prevent the temperature from being too high and the material performance from being insufficient, the furnace body water jacket 4 is required. A large amount of flue gas is generated during the agitation process. The flue gas passes through the chimney 1 at the top of the furnace body. The chimney is equipped with a filter screen 11 and an adsorption plate 12 and is finally discharged into the atmosphere.
[0055] The robot for controlling the enhanced heating system in this metallurgical furnace has the following beneficial effects:
[0056] (1) Using an external resistance tomography imaging system, an image acquisition system, and a chaos controller, and combining chaos theory methods, we developed a robot for controlling the enhanced heating system in metallurgical furnaces from the perspective of accurately characterizing the growth and coalescence behavior of bubbles during the movement of bubble swarms.
[0057] (2) The enhanced heating system control robot in the metallurgical furnace of this invention facilitates thorough stirring of the molten slurry, promotes the flotation of inclusions, and achieves uniform temperature and composition. The stirring area is expanded, the splash height is reduced, and the heat transfer efficiency is improved. It overcomes the technical difficulties of severe splashing in the molten pool, insufficient utilization of oxygen enrichment, and difficulty in large-scale production.
[0058] (3) The material is added from the feed ports on both sides of the furnace body at the same time. Under high temperature, the bubble generator sprays oxygen-rich air into the furnace through different air flow rates to stir the molten slurry. During this process, the atmosphere inside the furnace body is adjusted to ensure that the flue gas meets the emission standards. When the flue gas passes through the top of the furnace body, it will be treated in a secondary manner. The chimney is equipped with a filter screen and an adsorption plate to prevent harmful gases and industrial impurities from flowing into the air. It is also one of the most effective ways to reduce carbon emissions. Reducing the emission of flue gas can also greatly reduce heat loss, thereby achieving safe, low-carbon, continuous, stable, and high-efficiency production.
[0059] (4) The robot controlled by the high temperature probe can monitor the stirring in the furnace without blind spots, achieving the characteristics of uniform stirring, uniform heating temperature, high yield, low energy consumption, high economic benefits, and reduced carbon emissions.
[0060] Example 2
[0061] Adopting such Figure 1The enhanced heating system control robot shown is used in a copper smelter in Yunnan Province. The raw material is copper, and the water jacket medium of the furnace is water. The device is 42.35 meters long, 66.6 meters high, and occupies an area of 534.4 square meters. The device is equipped with a 10kV backup line, three diesel generator sets (with normal power of 512kw, 800kW, and 1000kW respectively), two battery packs (with capacities of 500AH and 1000AH respectively), and two EPS (with a capacity of 80kVA) and other emergency power supplies.
[0062] Experimental results show that the heating temperature uniformity can be accurate to within 8℃, the yield rate is increased by 8.3%, energy consumption is reduced by 15.2%, the average annual energy saving is more than 6.8 million tons of standard coal, the economic benefit is 8.23 million yuan / year, carbon emissions are reduced by 24.95 million tons, which is 27.49% lower than the conventional scenario, and the carbon trading volume can reach more than 1.5 billion yuan.
[0063] Example 3
[0064] Adopting such Figure 1 The enhanced heating system control robot shown is applied to the bottom-blown melting furnace in a company's smelting plant. The furnace body water jacket medium is water. The device has a rated capacity of 15t, a rated power of 8000kW, a rated voltage of 2000V, and a cooling water consumption of 180t / h.
[0065] Experimental results show that while improving the uniformity of molten pool mixing, it also reduces molten splashing, increases furnace life from two years to three years and four months, increases production capacity by 8.63%, saves an average of more than 4.2 million tons of standard coal equivalent per year, achieves economic benefits of about 7.16 million yuan per year, reduces carbon emissions by 15.41 million tons, which is 16.24% lower than the conventional scenario, and the carbon trading volume can reach more than 900 million yuan.
[0066] The above description is merely a preferred embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.
Claims
1. A heating control system for a smelting furnace based on a high-temperature probe, characterized in that, include: The system includes a raw material mixing module, an information acquisition module, and a heating control module, wherein the raw material mixing module, the information acquisition module, and the heating control module are connected in sequence. The raw material stirring module is used to stir and melt raw materials, which are distributed inside the melting furnace; The information acquisition module acquires smelting information inside the smelting furnace based on a high-temperature probe; wherein the high-temperature probe is installed on the inner wall of the smelting furnace. The heating control module adjusts the stirring rate of the smelting raw materials based on the smelting information. The information acquisition module includes a temperature acquisition unit and a density acquisition unit; The temperature acquisition unit acquires temperature information inside the smelting furnace based on a high-temperature probe. The density acquisition unit acquires density information inside the smelting furnace based on a high-temperature probe; The temperature acquisition unit uses a thermocouple sensor to monitor the temperature information, and the thermocouple sensor is installed on the inner wall of the melting furnace. The heating control module includes an information transmission unit and a rate control unit; The information transmission unit is used to transmit smelting information, which includes the temperature information and the density information; The rate control unit is used to receive the smelting information and, based on the smelting information, control the stirring rate of the smelting raw material. The information transmission unit uses an image acquisition system to transmit the smelting information to the rate control unit. The furnace body water jacket is used to regulate the temperature inside the smelting furnace; The flue gas treatment module is used to treat the flue gas generated during the stirring and smelting of raw materials.
2. The heating control system for a smelting furnace based on a high-temperature probe according to claim 1, characterized in that, The raw material mixing module includes a raw material adding unit and a gas injection unit; The raw material adding unit is used to add smelting raw materials into the smelting furnace; The gas injection unit is used to inject oxygen-enriched air into the smelting furnace and stir the smelting raw materials through the oxygen-enriched air.
3. The heating control system for a smelting furnace based on a high-temperature probe according to claim 2, characterized in that, The gas injection unit uses a bubble generator to inject the oxygen-enriched air, and the bubble generator is installed outside the smelting furnace.