Converter dust removal system waste gas waste heat cascade utilization device

Abstract

The application discloses a converter dust removal system waste gas waste heat cascade utilization device and relates to the technical field of converter dust removal.The device comprises an intelligent control system, and a waste heat cascade utilization assembly is arranged on the outer surface of the intelligent control system.When the device is in use, when the first temperature sensor detects that the flue gas temperature exceeds the set value, the intelligent control system triggers the two second electric valves to be closed and the two first electric valves to be opened, a large amount of high-temperature flue gas enters the heat exchange pipe, and the phase change material absorbs heat and stores the heat.After the converter stops blowing, when the second temperature sensor detects that the temperature is lower than the set temperature data, the intelligent control system controls the two first electric valves to be closed and the first electromagnetic valve, the two second electromagnetic valves and the two second electric valves to be opened, the gas injection pipe injects gas, the phase change material releases heat, becomes high-temperature gas and enters the vaporization cooling flue body and the gas boiler body, so that steam is stably output during the whole converter blowing process.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of converter dust removal, in particular to a waste gas waste heat cascade utilization device of a converter dust removal system. BACKGROUND

[0002] The converter is one of the main equipment for steelmaking, mainly used for smelting molten iron produced by blast furnace into steel. Its furnace body can rotate, and the converter has fast steelmaking speed and high production efficiency, and is one of the core equipment in modern steel production. The converter dust removal system is an environmental protection and process auxiliary system matched with the converter. A large amount of high-temperature flue gas is generated during the steelmaking process of the converter, which contains a large amount of dust. The dust removal system is needed to collect, cool and purify the flue gas, and the finally purified flue gas is discharged through the chimney.

[0003] In the prior art, in the waste gas waste heat recycling process of the converter dust removal system, the high-temperature flue gas first enters the vaporization cooling flue to absorb high-temperature heat to generate steam, and then enters the gas-fired boiler to absorb heat again to generate secondary steam for power generation or heating. The flue gas with reduced temperature enters the dust removal system for dust removal and purification. However, the converter blowing is an intermittent process. During the blowing peak period, the flue gas temperature is high, and steam can be continuously generated. When the blowing interval is entered, the flue gas supply is suddenly cut off, causing the steam production to fluctuate greatly, affecting the stability of subsequent power generation or heating, aggravating the fatigue damage of the gas-fired boiler equipment, and shortening the service life.

[0004] Therefore, we propose a waste gas waste heat cascade utilization device of a converter dust removal system to solve the problems raised in the above background art. SUMMARY

[0005] The present application aims to provide a waste gas waste heat cascade utilization device of a converter dust removal system to solve the problems raised in the above background art that in the waste gas waste heat utilization process of the converter dust removal system, the high-temperature flue gas sequentially enters the vaporization cooling flue and the gas-fired boiler to absorb heat and generate steam, and then enters the dust removal system for dust removal and purification, but the converter blowing is an intermittent process. When the converter enters the blowing interval, the flue gas supply is suddenly cut off, which easily causes the steam production to fluctuate greatly, affects the stability of subsequent power generation or heating, aggravates the fatigue damage of the gas-fired boiler equipment, and shortens the service life.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a waste gas waste heat cascade utilization device of a converter dust removal system, comprising an intelligent control system, a waste heat cascade utilization assembly is arranged on the outer surface of the intelligent control system, an auxiliary assembly is arranged on the top of the waste heat cascade utilization assembly, and a cleaning assembly is arranged on the outer surface of the auxiliary assembly.

[0007] The auxiliary assembly includes a phase change shell, a heat exchange pipe is fixedly installed in the phase change shell, a phase change material is arranged in the phase change shell, connecting pipes are connected to the two ends of the heat exchange pipe through flanges, first electric valves are arranged on the outer surfaces of the two connecting pipes, a gas injection pipe is fixedly connected to the outer surface of one of the connecting pipes, a first electromagnetic valve is arranged on the outer surface of the gas injection pipe, a hot gas pipeline is fixedly connected to the outer surface of the other connecting pipe, and second electromagnetic valves are arranged on the outer surfaces of the two ends of the hot gas pipeline.

[0008] Preferably, the waste heat cascade utilization assembly includes a vaporization cooling flue body and a gas boiler body, the input end of the gas boiler body is connected with an air inlet pipe through a flange, and the output end of the vaporization cooling flue body and the input end of the air inlet pipe are connected with three-way pipes through flanges.

[0009] Preferably, one end of the two three-way pipes is connected with a U-shaped pipe through a flange, second electric valves are arranged on the outer surfaces of the two ends of the U-shaped pipe, a first temperature sensor is fixedly installed on the outer surface of one of the three-way pipes, a second temperature sensor is fixedly installed on the outer surface of the air inlet pipe, a dust removal mechanism is arranged at the bottom of the gas boiler body, and a low-temperature heat exchanger is arranged on the outer surface of the dust removal mechanism.

[0010] Preferably, one end of the hot gas pipeline penetrates into the vaporization cooling flue body, one end of each of the other two connecting pipes is connected with the other end of each of the two three-way pipes through a flange, the output end of the gas boiler body is connected with the input end of the dust removal mechanism through a pipeline, and the output end of the dust removal mechanism is connected with the input end of the low-temperature heat exchanger through a pipeline.

[0011] Preferably, the cleaning assembly includes a fixed ring, a moving plate is arranged on one side of the outer surface of the fixed ring, a plurality of movable holes are equidistantly arranged on the outer surface of the fixed ring, movable rods are movably arranged in the plurality of movable holes, fixed balls are fixedly installed on one end of the plurality of movable rods, fixed blocks are fixedly installed on the other end of the plurality of movable rods, ultrasonic transducers are fixedly installed on one side of the outer surface of the plurality of fixed blocks, a mounting bracket is fixedly installed at the bottom of the outer surface of the phase change shell, a reinforcing frame is fixedly installed at the top of the rear surface of the mounting bracket, and an ultrasonic generator is fixedly installed on the top of the reinforcing frame.

[0012] Preferably, one side of the phase change shell is externally provided with a fixing frame which is fixedly provided with two hydraulic rods, the edge of one side of the moving plate is fixedly provided with a plurality of inclined slides, one side of the moving plate is fixedly provided with a plurality of wedge-shaped heat insulation blocks, one side of the plurality of ultrasonic transducers is in contact with one side of the plurality of wedge-shaped heat insulation blocks, the other side of the plurality of wedge-shaped heat insulation blocks is in contact with the outer surface of the phase change shell, and the outer surface of the plurality of movable rods is movably provided with a spring.

[0013] Preferably, one end of the heat exchange pipe is internally fixedly connected with a dust suction pipe, the outer surface of the dust suction pipe is fixedly connected with an air suction pipe, one end of the air suction pipe is fixedly penetrated to the outer surface of the heat exchange pipe, the outer surface of the air suction pipe is provided with a third electromagnetic valve, the inner portion of the dust suction pipe is provided with a gas guide ring, the outer surface of the gas guide ring is fixedly connected with the inner wall of one end of the heat exchange pipe, and the outer surface of the hot gas pipeline is fixedly provided with two support plates, and the bottom of the two support plates is fixedly installed at the top of the rear surface of the mounting frame.

[0014] Preferably, one side of the fixing ring is externally fixedly provided with a plurality of sliding rods, one end of the plurality of sliding rods is movably penetrated to the other side of the moving plate, and one end of the two hydraulic rods is fixedly connected with the other side of the moving plate.

[0015] Preferably, the outer surface of the plurality of fixed balls is in contact with the inner wall of the plurality of inclined slides, the outer surface of the plurality of movable rods is fixedly provided with two limiting strips, the inner wall of the plurality of movable holes is provided with a plurality of limiting holes, and the outer surface of the plurality of limiting strips is movably embedded in the inner portion of the plurality of limiting holes.

[0016] Preferably, one end of the plurality of springs is fixedly connected with the other side of the plurality of fixed blocks, the other end of the plurality of springs is fixedly connected with the inner wall of the fixing ring, the inner wall of the fixing ring is fixedly provided with a plurality of I-shaped pieces, the outer surface of the plurality of I-shaped pieces is fixedly installed on the outer surface of the phase change shell, and the inner portion of the moving plate is movably sleeved on the outer surface of the phase change shell.

[0017] Compared with the prior art, the present application has the following advantages:

[0018] 1. In use, when the first temperature sensor detects that the flue gas temperature exceeds the set value, the intelligent control system triggers the closure of two second electric valves and the opening of two first electric valves, allowing a large amount of high-temperature flue gas to enter the heat exchange tubes. The phase change material absorbs and stores heat. After the converter stops blowing, when the second temperature sensor detects that the temperature is lower than the set temperature data, the intelligent control system controls the closure of the two first electric valves and opens the first solenoid valve, two second solenoid valves, and two second electric valves. Gas is injected through the gas injection pipe, and the phase change material releases heat, turning the gas into high-temperature gas that enters the hot gas pipeline. This gas replaces the high-temperature flue gas and enters the vaporization cooling flue and the gas boiler body, efficiently storing and releasing heat. This rationally allocates the heat that might have been wasted during peak blowing and the heat lacking during blowing intervals, enabling a more continuous and stable absorption of heat and stable steam output throughout the entire converter blowing process, thus improving the overall utilization efficiency of waste heat.

[0019] 2. In use, this invention utilizes the heat from the high-temperature section of the flue gas by vaporizing and cooling the flue body to generate steam. The flue gas then enters the gas-fired boiler body for the medium-temperature section of heat utilization. Next, the flue gas passes through a pipe into the dust removal mechanism for dust removal. Finally, it passes through a pipe into a low-temperature heat exchanger, where it uses the low-temperature waste heat of the flue gas to heat water for other applications. With the help of the waste heat cascade utilization component, the high-temperature flue gas is utilized in stages—high-temperature, medium-temperature, and low-temperature sections—significantly improving waste heat recovery efficiency and reducing heat waste.

[0020] 3. In use, the two hydraulic rods are activated to pull the moving plate away from the fixed ring. After the wedge-shaped heat insulation block moves away from the ultrasonic transducer, the continuing to move inclined slide compresses the fixed ball, pushing the ultrasonic transducer to adhere to the outer surface of the phase change shell via the movable rod. The ultrasonic generator is then activated, converting the high-frequency electrical signal into ultrasonic waves, which are transmitted to the heat exchange tube, peeling off dust and impurities from the inner wall of the heat exchange tube. Simultaneously, the suction pipe draws the dust and impurities peeled off from the heat exchange tube into an external dust collection bag. Through the cleaning components, combined with ultrasonic cleaning and suction, effective cleaning of the heat exchange tube is achieved, ensuring subsequent heat exchange efficiency.

[0021] 4. In use, the hydraulic rod pushes the moving plate to move in the opposite direction. When the inclined slide moves in the opposite direction, the compressive force on the fixed ball gradually disappears. The spring pulls the ultrasonic transducer to move and reset, separating it from the phase change housing. Then, the wedge-shaped heat insulation block moves to the bottom of the ultrasonic transducer, preventing high temperatures from affecting the performance of the ultrasonic transducer and shortening its service life when the phase change material releases heat. The wedge-shaped heat insulation block effectively blocks high-temperature heat from being transferred to the ultrasonic transducer, helping to ensure the reliability and service life of the ultrasonic transducer. Attached Figure Description

[0022] Figure 1It is the first angle perspective view of a converter dust removal system waste heat cascade utilization device of the application;

[0023] Figure 2 It is the second angle perspective view of a converter dust removal system waste heat cascade utilization device of the application;

[0024] Figure 3 It is the third angle perspective view of a converter dust removal system waste heat cascade utilization device of the application;

[0025] Figure 4 It is the structure schematic view of an auxiliary assembly in a converter dust removal system waste heat cascade utilization device of the application;

[0026] Figure 5 It is the structure schematic view of an ultrasonic generator in a converter dust removal system waste heat cascade utilization device of the application;

[0027] Figure 6 It is the structure cross-sectional view schematic of a phase change shell in a converter dust removal system waste heat cascade utilization device of the application;

[0028] Figure 7 It is the structure cross-sectional view schematic of a heat exchange pipe in a converter dust removal system waste heat cascade utilization device of the application;

[0029] Figure 8 It is the structure schematic view of a cleaning assembly in a converter dust removal system waste heat cascade utilization device of the application;

[0030] Figure 9 It is the structure development schematic view of a fixing ring in a converter dust removal system waste heat cascade utilization device of the application;

[0031] Figure 10 It is the structure cross-sectional view schematic of an inclined slide in a converter dust removal system waste heat cascade utilization device of the application.

[0032] In the figure:

[0033] 1, intelligent control system; 2, waste heat cascade utilization assembly; 201, vaporization cooling flue body; 202, gas boiler body; 203, tee pipe; 204, gas inlet pipe; 205, U-shaped pipe; 206, dust removal mechanism; 207, low-temperature heat exchanger; 208, second electric valve; 209, first temperature sensor; 210, second temperature sensor; 3, auxiliary assembly; 301, phase change shell; 302, mounting frame; 303, heat exchange pipe; 304, phase change material; 305, connecting pipe; 306, first electric valve; 307, gas injection pipe; 308, first electromagnetic valve; 309, hot gas pipeline; 310, second electromagnetic valve; 311, support plate; 4, cleaning assembly; 401, fixed ring; 402, moving plate; 403, fixed frame; 404, hydraulic rod; 405, reinforcing frame; 406, ultrasonic generator; 407, wedge-shaped heat insulation block; 408, inclined slide; 409, movable hole; 410, movable rod; 411, fixed ball; 412, fixed block; 413, ultrasonic transducer; 414, spring; 415, slide rod; 416, I-shaped piece; 417, limiting strip; 418, limiting hole; 419, dust suction pipe; 420, air suction pipe; 421, third electromagnetic valve; 422, air guide ring. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0035] Embodiment one: please refer to Figures 1-10As shown, the present application provides a technical scheme: a converter dust removal system waste heat cascade utilization device, including intelligent control system 1, the outer surface of intelligent control system 1 is provided with waste heat cascade utilization assembly 2, the top of waste heat cascade utilization assembly 2 is provided with auxiliary assembly 3, the outer surface of auxiliary assembly 3 is provided with cleaning assembly 4;Auxiliary assembly 3 includes phase change shell 301, heat exchange pipe 303 is fixedly installed in phase change shell 301, phase change material 304 is arranged in phase change shell 301, both ends of heat exchange pipe 303 are connected with connecting pipe 305 through flange plate, the outer surface of one end of two connecting pipes 305 is provided with first electric valve 306, the outer surface of one of connecting pipes 305 is fixedly connected with gas injection pipe 307, the outer surface of gas injection pipe 307 is provided with first electromagnetic valve 308, the outer surface of another connecting pipe 305 is fixedly connected with hot gas pipeline 309, the outer surface of both ends of hot gas pipeline 309 is provided with second electromagnetic valve 310, waste heat cascade utilization assembly 2 includes vaporization cooling flue body 201 and gas boiler body 202, the input end of gas boiler body 202 is connected with air inlet pipe 204 through flange plate, the output end of vaporization cooling flue body 201 and the input end of air inlet pipe 204 are both connected with three-way pipe 203 through flange plate, one end of two three-way pipes 203 is connected with U-shaped pipe 205 through flange plate, the outer surface of both ends of U-shaped pipe 205 is provided with second electric valve 208, the outer surface of one of three-way pipes 203 is fixedly installed with first temperature sensor 209, the outer surface of air inlet pipe 204 is fixedly installed with second temperature sensor 210, the bottom of gas boiler body 202 is provided with dust removal mechanism 206, the outer surface of dust removal mechanism 206 is provided with low-temperature heat exchanger 207, one end of hot gas pipeline 309 is fixedly penetrated into the inside of vaporization cooling flue body 201, the other end of two connecting pipes 305 is connected with the other end of two three-way pipes 203 through flange plate respectively.

[0036] In this embodiment, in use, the first electromagnetic valve 308, the two second electromagnetic valves 310 and the two first electric valves 306 are in the closed state, and the two second electric valves 208 are in the open state. One end of the gas injection pipe 307 is connected with the external gas injection equipment. In the process of the high-temperature flue gas passing through the waste heat cascade utilization assembly 2 for waste heat cascade recycling, the temperature of the flue gas is detected by the first temperature sensor 209, and the detected temperature data is transmitted to the intelligent control system 1 in the form of an electric signal for identification and analysis. When the temperature of the flue gas exceeds the set value, the intelligent control system 1 triggers the two second electric valves 208 to close and opens the two first electric valves 306, so that the flue gas enters the left connecting pipe 305 through the left three-way pipe 203, then enters the heat exchange pipe 303 inside, and transfers heat to the phase change material 304 outside the heat exchange pipe 303 through convection heat exchange. The phase change material 304 first absorbs sensible heat, and the temperature rises from room temperature to the phase change temperature. Then, after continuing to absorb heat, the phase change material 304 undergoes a phase change, absorbs a large amount of latent heat and stores it, and the temperature of the flue gas after temperature reduction enters the gas inlet pipe 204 through the right connecting pipe 305 and the right three-way pipe 203, and then enters the gas boiler body 202 for medium-temperature heat recycling. After the converter stops blowing, the flue gas flow drops sharply, the temperature of the gas inlet pipe 204 decreases, the temperature inside the gas inlet pipe 204 is detected by the second temperature sensor 210, and the detected temperature data is transmitted to the intelligent control system 1 for identification and analysis. When the temperature is lower than the set temperature data, the intelligent control system 1 controls the two first electric valves 306 to close, opens the first electromagnetic valve 308, the two second electromagnetic valves 310 and the two second electric valves 208, and simultaneously starts the external gas injection equipment. The flowing gas is injected into the heat exchange pipe 303 through the gas injection pipe 307. When the gas flows in the heat exchange pipe 303, the phase change material 304 releases heat, the gas absorbs heat to become high-temperature gas, forms a hot gas flow simulating flue gas, enters the hot gas pipeline 309, and then replaces the high-temperature flue gas to flow into the vaporization cooling flue body 201, so that the working medium in the pipe continuously evaporates to form steam, and then flows into the gas boiler body 202 from the three-way pipe 203, the U-shaped pipe 205 and the gas inlet pipe 204 according to the initial path, to assist the gas boiler body 202 to utilize heat to maintain the continuous evaporation of the working medium, generate steam, and avoid the interruption of steam supply caused by the blowing of the converter, thereby causing the steam production to fluctuate greatly. When the converter is blown again, the gas injection equipment is closed, the first electromagnetic valve 308 and the two second electromagnetic valves 310 are closed, so that the generated high-temperature flue gas continues to flow along the initial path, and the waste heat cascade utilization assembly 2 recycles and utilizes the heat of the high-temperature flue gas.With the cooperation of auxiliary component 3, waste heat cascade utilization component 2 and intelligent control system 1, heat is efficiently stored and released. The heat that might have been wasted during the peak blowing period and the heat lacking during the blowing interval are rationally allocated. This allows the gas boiler body 202 to absorb heat more continuously and stably and convert it into steam throughout the entire converter blowing process. This results in stable steam output, which facilitates the operation and control of subsequent steam-using equipment and improves the overall utilization efficiency of waste heat. It also solves the problem that in the process of waste heat utilization of waste gas in the converter dust removal system, high-temperature flue gas enters the vaporization cooling flue and the gas boiler in sequence to absorb heat and generate steam, and then enters the dust removal system for dust removal and purification. However, since converter blowing is an intermittent process, when the converter enters the blowing interval, the flue gas supply is suddenly cut off, which can easily cause large fluctuations in steam production, affect the stability of subsequent power generation or heating, aggravate fatigue damage to the gas boiler equipment, and shorten its service life.

[0037] Example 2: Figures 1-4 As shown, the waste heat cascade utilization component 2 includes a vaporization cooling flue body 201 and a gas boiler body 202. The input end of the gas boiler body 202 is connected to an air inlet pipe 204 via a flange. The output end of the vaporization cooling flue body 201 and the input end of the air inlet pipe 204 are both connected to a tee pipe 203 via a flange. One end of each tee pipe 203 is connected to a U-shaped pipe 205 via a flange. A second electric valve 208 is installed on the outer surface of both ends of the U-shaped pipe 205. A first temperature sensor 209 is fixedly installed on the outer surface of one of the tee pipes 203, and a second temperature sensor 210 is fixedly installed on the outer surface of the air inlet pipe 204. A dust removal mechanism 206 is installed at the bottom of the gas boiler body 202. A low-temperature heat exchanger 207 is installed on the outer surface of the dust removal mechanism 206. The output end of the gas boiler body 202 is connected to the input end of the dust removal mechanism 206 via a pipe, and the output end of the dust removal mechanism 206 is connected to the input end of the low-temperature heat exchanger 207 via a pipe.

[0038] In this embodiment, in use, the high-temperature flue gas generated in the converter blowing process enters the vaporization cooling flue body 201 from the high-temperature flue gas pipeline, the high-temperature flue gas transmits heat to the working medium in the pipe through radiation heat exchange and convection heat exchange, the desalted water in the pipe absorbs heat and partially vaporizes to form a "steam-water mixture", the mixture returns to the steam drum through the riser pipe, the steam-water separation is completed in the steam drum, high-pressure saturated steam is generated, and the high-pressure saturated steam can be directly used for heating or driving other equipment. Through the vaporization cooling flue body 201, the high-temperature section heat utilization is carried out, then the flue gas passes through the tee pipe 203, the U-shaped pipe 205 and the gas inlet pipe 204, enters the gas boiler body 202, the evaporation pipe bundle in the boiler absorbs the sensible heat of the flue gas, and the saturated water sent by the steam drum is further heated to saturated steam to supplement the steam. Through the gas boiler body 202, the medium-temperature section heat utilization is carried out, then the flue gas passes through the pipeline into the dust removal mechanism 206 to remove dust, and finally passes through the pipeline into the low-temperature heat exchanger 207, the low-temperature heat exchanger 207 uses the low-temperature waste heat of the flue gas to heat the water supply, which is used for other purposes. Under the action of the waste heat cascade utilization assembly 2, the high-temperature flue gas is sequentially subjected to the high-temperature section, the medium-temperature section and the low-temperature section cascade utilization, the waste heat recovery and utilization efficiency is greatly improved, and the heat waste is reduced.

[0039] Embodiment three: as Figures 4-10As shown, the cleaning assembly 4 comprises a fixed ring 401, the outer surface of one side of the fixed ring 401 is provided with a moving plate 402, the outer surface of the fixed ring 401 is equidistantly provided with a plurality of movable holes 409, the inside of the plurality of movable holes 409 is movably embedded with a movable rod 410, one end of the plurality of movable rods 410 is fixedly installed with a fixed ball 411, the other end of the plurality of movable rods 410 is fixedly installed with a fixed block 412, the outer surface of one side of the plurality of fixed blocks 412 is fixedly installed with an ultrasonic transducer 413, the bottom of the outer surface of the phase change shell 301 is fixedly installed with a mounting bracket 302, the top of the rear surface of the mounting bracket 302 is fixedly installed with a reinforcing frame 405, the top of the reinforcing frame 405 is fixedly installed with an ultrasonic generator 406, one side of the outer surface of the phase change shell 301 is fixedly installed with a fixed frame 403, the inside of the fixed frame 403 is fixedly installed with two hydraulic rods 404, the edge of the outer surface of one side of the moving plate 402 is fixedly installed with a plurality of inclined slides 408, the outer surface of one side of the moving plate 402 is fixedly installed with a plurality of wedge-shaped heat insulation blocks 407, the outer surface of one side of the plurality of wedge-shaped heat insulation blocks 407 is respectively in contact with the outer surface of one side of the plurality of wedge-shaped heat insulation blocks 407, the outer surface of the other side of the plurality of wedge-shaped heat insulation blocks 407 is in contact with the outer surface of the phase change shell 301, the outer surface of the plurality of movable rods 410 is movably sleeved with a spring 414, the inside of one end of the heat exchange pipe 303 is fixedly connected with a dust suction pipe 419, the outer surface of the dust suction pipe 419 is fixedly connected with a suction pipe 420, one end of the suction pipe 420 is fixedly penetrated to the outer surface of the heat exchange pipe 303, the outer surface of the suction pipe 420 is provided with a third electromagnetic valve 421, the inside of the dust suction pipe 419 is provided with a gas guide ring 422, the outer surface of the gas guide ring 422 is fixedly connected with the inner wall of one end of the heat exchange pipe 303, the outer surface of the hot gas pipeline 309 is fixedly installed with two supporting plates 311, the bottom of the two supporting plates 311 is fixedly installed at the top of the rear surface of the mounting bracket 302, the outer surface of one side of the fixed ring 401 is fixedly installed with a plurality of slide rods 415, one end of the plurality of slide rods 415 is movably penetrated to the other outer surface of the moving plate 402, one end of the two hydraulic rods 404 is fixedly connected with the other outer surface of the moving plate 402, the outer surface of the plurality of fixed balls 411 is respectively in contact with the inner wall of the plurality of inclined slides 408, the outer surface of the plurality of movable rods 410 is fixedly installed with two limiting strips 417, the inner wall of the plurality of movable holes 409 is provided with a plurality of limiting holes 418, the outer surface of the plurality of limiting strips 417 is movably embedded in the inside of the plurality of limiting holes 418, one end of the plurality of springs 414 is fixedly connected with the other outer surface of the plurality of fixed blocks 412, the other end of the plurality of springs 414 is fixedly connected with the inner wall of the fixed ring 401, the inner wall of the fixed ring 401 is fixedly installed with a plurality of I-shaped pieces 416, the outer surface of the plurality of I-shaped pieces 416 is fixedly installed on the outer surface of the phase change shell 301, the inside of the moving plate 402 is movably sleeved on the outer surface of the phase change shell 301.

[0040] In this embodiment, in use, one end of the suction pipe 420 is connected with the external dust collection equipment, and the third electromagnetic valve 421 is in a closed state. When the auxiliary assembly 3 is not working, first start the two hydraulic rods 404, pull the moving plate 402 to slide on the outer surface of the phase change shell 301 and the slide rod 415, gradually move away from the fixed ring 401, and at the same time drive the plurality of inclined slides 408 and the plurality of wedge-shaped thermal insulation blocks 407 to move together. When the wedge-shaped thermal insulation block 407 moves away from the ultrasonic transducer 413, the fixed ball 411 slides in the inclined slide 408 to be close to the inclined surface, and there is still a distance from the inclined surface. With the continuous movement of the moving plate 402, the inclined slide 408 continues to move, so that the fixed ball 411 moves from the long plane to the inclined surface, and finally moves to the short plane. During this process, the fixed ball 411 is extruded by the inclined slide 408, pushes the movable rod 410 to move towards the phase change shell 301, and pulls the spring 414 to expand. At the same time of the movement of the movable rod 410, the fixed block 412 is pushed to move, so that the ultrasonic transducer 413 moves towards the phase change shell 301. When the hydraulic rod 404 is automatically closed, the fixed ball 411 moves to the short plane of the inclined slide 408, and the ultrasonic transducer 413 is attached to the outer surface of the phase change shell 301. Start the ultrasonic generator 406 to generate high-frequency electric signals, and the ultrasonic transducer 413 converts the high-frequency electric signals into ultrasonic waves and transmits them to the heat exchange pipe 303. By using cavitation effect, etc., the dust and impurities on the inner wall of the heat exchange pipe 303 are stripped off. At the same time, start the dust collection equipment, and start the third electromagnetic valve 421 to open. By using the suction force of the dust collection equipment, the dust and impurities stripped from the heat exchange pipe 303 are sucked into the external dust collection bag through the dust collection pipe 419. Through the cleaning assembly 4, combined with ultrasonic cleaning and dust collection, the heat exchange pipe 303 is effectively cleaned, and the subsequent heat exchange efficiency is ensured.

[0041] Further, after cleaning is completed, the two hydraulic rods 404 are started again, and the moving plate 402 is pushed to move, so that the inclined slide 408 and the wedge-shaped thermal insulation block 407 move towards the ultrasonic transducer 413. During this process, the fixed ball 411 moves from the short plane of the inclined slide 408 to the inclined surface and finally to the long plane. During this process, the extrusion force on the fixed ball 411 gradually disappears, and under the elastic force of the spring 414, the fixed block 412 and the ultrasonic transducer 413 are pulled to move back to the original position, so that the ultrasonic transducer 413 is separated from the phase change shell 301, and then the wedge-shaped thermal insulation block 407 moves to the bottom of the ultrasonic transducer 413. When cleaning is needed, the circumferential array of ultrasonic transducers 413 are evenly distributed on the outer surface of the phase change shell 301 and are attached to the phase change shell 301, which is conducive to efficient cleaning. When cleaning is not needed, the ultrasonic transducer 413 is separated from the phase change shell 301, so as to avoid the influence of high temperature on the performance of the ultrasonic transducer 413 when the phase change material 304 releases heat in the future, and shorten the service life of the ultrasonic transducer 413.

[0042] When the elasticity of a certain spring 414 is not good, the moving wedge-shaped thermal insulation block 407 can be inserted between the ultrasonic transducer 413 and the phase change shell 301, and the ultrasonic transducer 413 is lifted up with the movement of the wedge-shaped thermal insulation block 407, and the ultrasonic transducer 413 is separated from the phase change shell 301, avoiding the influence of subsequent high temperature. The wedge-shaped thermal insulation block 407 uses thermal insulation material, effectively blocks the high temperature heat from being transmitted to the ultrasonic transducer 413, and helps to ensure the reliability and service life of the ultrasonic transducer 413.

[0043] The effect and working principle of the whole mechanism are as follows: the high-temperature flue gas pipeline enters the vaporization cooling flue body 201, and the heat is transferred to the working medium in the pipe through radiation heat transfer and convection heat transfer to generate steam. Then the flue gas enters the gas boiler body 202 through the tee pipe 203, the U-shaped pipe 205 and the inlet pipe 204. The evaporation pipe bundle in the boiler absorbs the sensible heat of the flue gas to supplement the steam. Then the flue gas enters the dust removal mechanism 206 through the pipeline for dust removal. Finally, the flue gas enters the low-temperature heat exchanger 207 through the pipeline. The low-temperature heat exchanger 207 uses the low-temperature waste heat of the flue gas to heat the water supply. During the process of waste heat cascade utilization, the first temperature sensor 209 detects the temperature of the flue gas and transmits the detected temperature data to the intelligent control system 1 for identification and analysis. When the temperature of the flue gas exceeds the set value, the intelligent control system 1 triggers the two second electric valves 208 to close and opens the two first electric valves 306, so that the flue gas enters the heat exchange pipe 303 through the connecting pipe 305. The phase change material 304 absorbs a large amount of latent heat and stores it. Then the flue gas enters the gas boiler body 202 through the connecting pipe 305, the tee pipe 203 and the inlet pipe 204 for medium-temperature heat recovery and utilization. After the converter blows out, the flue gas flow decreases suddenly, and the temperature of the inlet pipe 204 decreases. The second temperature sensor 210 monitors the temperature. When the temperature is lower than the set temperature data, the intelligent control system 1 controls the two first electric valves 306 to close and opens the first electromagnetic valve 308, the two second electromagnetic valves 310 and the two second electric valves 208. At the same time, the external gas injection equipment is started, and the gas is injected into the heat exchange pipe 303 through the gas injection pipe 307. The phase change material 304 releases heat, and the gas absorbs heat to become high-temperature gas, forming a hot gas flow simulating flue gas, which enters the hot gas pipeline 309 and then replaces the high-temperature flue gas to flow into the vaporization cooling flue body 201, assisting the gas boiler body 202 to utilize heat to maintain the continuous heat absorption and evaporation of the working medium to generate steam. When the converter blows again, the gas injection equipment is closed, and the first electromagnetic valve 308 and the two second electromagnetic valves 310 are closed, so that the generated high-temperature flue gas continues to flow along the initial path, and the waste heat cascade utilization assembly 2 recovers and utilizes the heat of the high-temperature flue gas in stages. Start the two hydraulic rods 404, pull the moving plate 402 away from the fixed ring 401, and at the same time drive the inclined slide 408 and the wedge-shaped heat insulation block 407 to move. When the wedge-shaped heat insulation block 407 moves away from the ultrasonic transducer 413, the inclined slide 408 continues to move to press the fixed ball 411, drive the movable rod 410 to move towards the phase change shell 301, and pull out the spring 414. Through the movement of the fixed block 412, the ultrasonic transducer 413 is pushed to adhere to the outer surface of the phase change shell 301. Start the ultrasonic generator 406, and the ultrasonic transducer 413 converts high-frequency electric signals into ultrasonic waves and transmits them to the heat exchange pipe 303. The ultrasonic waves strip off the dust and impurities on the inner wall of the heat exchange pipe 303.At the same time, the dust suction device is started, and the third electromagnetic valve 421 is opened to suck the dust and impurities stripped from the heat exchange pipe 303 to the external dust collection bag through the dust suction pipe 419. The two hydraulic rods 404 are started again to push the moving plate 402 to move reversely. With the reverse movement of the inclined slide 408, the extrusion force on the fixed ball 411 gradually disappears, the spring 414 pulls the ultrasonic transducer 413 to move and reset, and separates from the phase change shell 301. Then, the wedge-shaped heat insulation block 407 moves to the bottom of the ultrasonic transducer 413.

[0044] Among them, the intelligent control system 1, the vaporization cooling flue body 201, the gas boiler body 202, the dust removal mechanism 206, the low-temperature heat exchanger 207, the second electric valve 208, the first temperature sensor 209, the second temperature sensor 210, the first electric valve 306, the first electromagnetic valve 308, the second electromagnetic valve 310, the hydraulic rod 404, the ultrasonic generator 406, the ultrasonic transducer 413 and the third electromagnetic valve 421 are all prior art, and their components and use principles are all disclosed technologies, which will not be explained in detail here.

[0045] Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacements to some of the technical features, as long as they are within the spirit and principles of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A device for the cascade utilization of waste heat from a converter dust removal system, comprising an intelligent control system (1), characterized in that: The outer surface of the intelligent control system (1) is provided with a waste heat cascade utilization component (2), the top of the waste heat cascade utilization component (2) is provided with an auxiliary component (3), and the outer surface of the auxiliary component (3) is provided with a cleaning component (4). The auxiliary component (3) includes a phase change housing (301), a heat exchange tube (303) is fixedly installed inside the phase change housing (301), a phase change material (304) is disposed inside the phase change housing (301), and connecting pipes (305) are connected to both ends of the heat exchange tubes (303) through flanges. A first electric valve (306) is provided on the outer surface of one end of each of the two connecting pipes (305). A gas injection pipe (307) is fixedly connected to the outer surface of one of the connecting pipes (305), and a first solenoid valve (308) is provided on the outer surface of the gas injection pipe (307). A hot gas pipe (309) is fixedly connected to the outer surface of the other connecting pipe (305), and a second solenoid valve (310) is provided on the outer surfaces of both ends of the hot gas pipe (309). The waste heat cascade utilization component (2) includes a vaporization cooling flue body (201) and a gas boiler body (202). The input end of the gas boiler body (202) is connected to an air inlet pipe (204) via a flange. The output end of the vaporization cooling flue body (201) and the input end of the air inlet pipe (204) are both connected to a tee pipe (203) via a flange. One end of each of the two tee pipes (203) is connected to a U-shaped pipe (205) via a flange. A second electric valve (208) is provided on the outer surface of both ends of the U-shaped pipe (205). A first temperature sensor (209) is fixedly installed on the outer surface of one of the tee pipes (203). A second temperature sensor (210) is fixedly installed on the outer surface of the air inlet pipe (204). A dust removal mechanism (206) is provided at the bottom of the gas boiler body (202). A low-temperature heat exchanger (207) is provided on the outer surface of the dust removal mechanism (206). One end of the hot gas pipe (309) is fixedly inserted into the interior of the vaporization cooling flue body (201), and one end of the other two connecting pipes (305) are respectively connected to the other end of the two tee pipes (203) through flanges. The output end of the gas boiler body (202) is connected to the input end of the dust removal mechanism (206) through a pipe. The output end of the dust removal mechanism (206) is connected to the input end of the low temperature heat exchanger (207) through a pipe. The cleaning component (4) includes a fixed ring (401), a movable plate (402) is provided on one side of the outer surface of the fixed ring (401), and a plurality of movable holes (409) are equidistantly opened on the outer surface of the fixed ring (401). Movable rods (410) are movably embedded in the interior of each of the plurality of movable holes (409). A fixed ball (411) is fixedly installed at one end of each of the plurality of movable rods (410), and a fixed block (412) is fixedly installed at the other end of each of the plurality of movable rods (410). An ultrasonic transducer (413) is fixedly installed on one side of the outer surface of each of the plurality of fixed blocks (412). A mounting bracket (302) is fixedly installed at the bottom of the outer surface of the phase change housing (301), and a reinforcing bracket (405) is fixedly installed at the top of the rear surface of the mounting bracket (302). An ultrasonic generator (406) is fixedly installed at the top of the reinforcing bracket (405). A fixing frame (403) is bolted to one side of the outer surface of the phase change housing (301). Two hydraulic rods (404) are fixedly installed inside the fixing frame (403). Multiple inclined slides (408) are fixedly installed at the edge of one side of the outer surface of the movable plate (402). Multiple wedge-shaped heat insulation blocks (407) are fixedly installed on one side of the outer surface of the movable plate (402). One side of the outer surface of multiple ultrasonic transducers (413) is in contact with one side of the outer surface of multiple wedge-shaped heat insulation blocks (407). The other side of the outer surface of multiple wedge-shaped heat insulation blocks (407) is in contact with the outer surface of the phase change housing (301). Springs (414) are movably sleeved on the outer surface of multiple movable rods (410). The outer surfaces of the multiple fixed balls (411) are in contact with the inner walls of the multiple inclined slides (408), and the outer surfaces of the multiple movable rods (410) are fixedly installed with two limiting strips (417). The inner walls of the multiple movable holes (409) are provided with multiple limiting holes (418), and the outer surfaces of the multiple limiting strips (417) are respectively movably embedded in the interior of the multiple limiting holes (418). One end of each of the multiple springs (414) is fixedly connected to the outer surface of the other side of the multiple fixed blocks (412), and the other end of each of the multiple springs (414) is fixedly connected to the inner wall of the fixed ring (401). Multiple I-shaped parts (416) are fixedly installed on the inner wall of the fixed ring (401), and the outer surfaces of the multiple I-shaped parts (416) are fixedly installed on the outer surface of the phase change housing (301). The interior of the movable plate (402) is movably sleeved on the outer surface of the phase change housing (301).

2. The waste heat recovery device for converter dust removal system according to claim 1, characterized in that: A dust extraction pipe fitting (419) is fixedly connected to the inside of one end of the heat exchange tube (303). An air suction pipe (420) is fixedly connected to the outer surface of the dust extraction pipe fitting (419). One end of the air suction pipe (420) is fixedly extended through the outer surface of the heat exchange tube (303). A third solenoid valve (421) is provided on the outer surface of the air suction pipe (420). An air guide ring (422) is provided inside the dust extraction pipe fitting (419). The outer surface of the air guide ring (422) is fixedly connected to the inner wall of one end of the heat exchange tube (303). Two support plates (311) are fixedly installed on the outer surface of the hot air pipe (309). The bottoms of the two support plates (311) are fixedly installed on the top of the rear surface of the mounting bracket (302).

3. The waste heat recovery device for converter dust removal system according to claim 2, characterized in that: Multiple slide rods (415) are fixedly installed on one side of the outer surface of the fixed ring (401). One end of each slide rod (415) extends movably through to the other side of the outer surface of the movable plate (402). One end of each of the two hydraulic rods (404) is fixedly connected to the other side of the outer surface of the movable plate (402).

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