Equipment for effectively increasing temperature of sintering secondary mixed material

Abstract

The invention relates to the technical field of secondary mixing material temperature increasing, in particular to equipment for effectively increasing the temperature of a sintered secondary mixing material, the equipment comprises a secondary mixing machine and supporting feet, the supporting feet are fixedly connected to the four corners of the lower end of the outer wall of the secondary mixing machine, and a spraying assembly is installed in the secondary mixing machine; and a water supply assembly is distributed on the left side of the outer wall of the secondary mixing machine. Through cooperation of the plate heat exchanger, the flow regulating valve, the water supply booster pump, the atomization nozzle and the secondary mixing machine, the synergistic interaction of waste heat-mixture preheating-water saving can be achieved, the energy consumption of the sintering process can be reduced by 10%-15%, meanwhile, the wastewater treatment cost is reduced, condensation of water vapor in a material layer can be reduced after the temperature of the mixture is increased, an over-wet layer is prevented from being thickened, and the service life of the material layer is prolonged. Therefore, the air permeability of the mixture is improved, the sintering speed is increased by 10%, and the fuel consumption is reduced.

Description

Technical Field

[0001] This invention relates to the field of temperature enhancement technology for two-component mixtures, specifically to a device for effectively enhancing the temperature of sintered two-component mixtures. Background Technology

[0002] Currently, the preheating of sintering mixtures at Agang mainly utilizes steam or waste heat from exhaust gases, but this approach suffers from high energy consumption and costs. Furthermore, the hot water generated after blast furnace slag flushing is typically discharged directly or treated simply, without effective utilization. Therefore, we propose an improved operational method for sintering mixture preparation by using hot water from slag flushing for temperature enhancement and recycling. This technology optimizes waste heat recovery, combining wastewater treatment with thermal energy utilization.

[0003] The blast furnace slag treatment process in ironmaking plants generates a large amount of high-temperature wastewater (90~110℃). Traditional treatment methods involve direct cooling and discharge, resulting in energy waste. Simultaneously, the insufficient temperature of the sintering mixture (typically 50~55℃) leads to poor material permeability and high solid fuel consumption. This patent achieves efficient wastewater heat recovery through wastewater heat exchange and intelligent control, increasing the sintering mixture temperature to 63~67℃, reducing energy consumption in the sintering process. Furthermore, using only fixed atomizing nozzles can easily lead to uneven mixing between the wastewater and materials, creating dead zones. Summary of the Invention

[0004] The purpose of this invention is to solve the problems of the large amount of high-temperature wastewater (90~110℃) generated during the blast furnace slag treatment process in ironmaking plants. Traditional treatment methods directly cool and discharge the wastewater, resulting in energy waste. At the same time, the insufficient temperature of the sintering secondary mixture (usually 50~55℃) leads to poor material permeability, high solid fuel consumption, and uneven mixing between wastewater and materials, which can easily lead to dead zones if only fixed atomizing nozzles are used. Therefore, this invention proposes a device to effectively increase the temperature of the sintering secondary mixture.

[0005] To achieve the above objectives, the present invention provides the following technical solution: Design an equipment for effectively increasing the temperature of sintering secondary mixture, including a secondary mixer and support legs. The secondary mixer has support legs fixed to the four corners of the lower end of its outer wall. Multiple top beams are fixed to the upper end of the secondary mixer. A servo motor is fixed to the upper right side of the secondary mixer's outer wall. The output shaft of the servo motor is equipped with a belt drive mechanism. A spray assembly is installed inside the secondary mixer. A water supply assembly is distributed on the left side of the secondary mixer's outer wall.

[0006] This setup allows material to be fed in through the opening at the top of the secondary mixer, combined with the injection of waste hot water from the atomizing nozzle. This enables the output shaft of the servo motor to drive the ribbon agitator for mixing via a belt drive mechanism.

[0007] Preferably, the water supply assembly includes a water supply booster pump, a waste residue hot water pipe is installed on the left front side of the water supply booster pump, the right front side of the water supply booster pump is connected to a flow regulating valve through a pipe, the right front side of the flow regulating valve is connected to a plate heat exchanger through a pipe, and a water supply pipe is connected to the upper right corner of the front end of the plate heat exchanger.

[0008] This setup involves pressurizing the wastewater via a water supply booster pump and then delivering it to a plate heat exchanger. The wastewater undergoes indirect heat exchange through corrugated plates. After cooling, the wastewater is injected into the spray pipe and atomizing nozzles via the water supply pipe and finally sprayed out, evenly distributing the heat-exchanged hot water onto the surface of the mixture.

[0009] Preferably, a heat exchange inlet pipe and a heat exchange outlet pipe are installed at the lower left and upper right corners of the front end of the plate heat exchanger, respectively. The heat exchange inlet pipe is connected to a flow regulating valve through a pipeline, and the heat exchange outlet pipe is fixedly connected to a water supply pipe.

[0010] Preferably, a heat-absorbing drain pipe and a heat-absorbing water inlet pipe are installed at the upper left and lower right corners of the front end of the plate heat exchanger, respectively.

[0011] This design, through the absorbing drain pipe and absorbing inlet pipe, allows the absorbing drain pipe and absorbing inlet pipe in the plate heat exchanger to be used to connect to the heating water pipe.

[0012] Preferably, the spray assembly includes a sleeve, the outer left wall of the sleeve is fixedly connected to the end of the water supply pipe, the upper and lower sides of the inner wall of the sleeve are rotatably connected to the upper water tank through sealed bearings, the outer wall of the upper water tank is machined with multiple water holes, and the lower outer side of the upper water tank is fixedly connected to the lower water tank through a vertical pipe, and the outer wall of the lower water tank is fixedly connected to the atomizing nozzle through multiple spray pipes.

[0013] This feature includes a sleeve and water holes, allowing the waste hot water discharged from the water supply pipe to directly enter the rotating upper and lower water tanks through the water holes, and finally be sprayed out through the spray pipe and atomizing nozzles.

[0014] Preferably, the inner walls of the upper and lower water tanks are fixedly connected to the rotating part of the ribbon agitator, and the upper part of the ribbon agitator is rotatably connected to the servo motor via a belt drive mechanism.

[0015] Preferably, a discharge port is installed on the front side of the outer wall of the two-component mixer, and a slag discharge port is installed on the lower side of the outer wall of the two-component mixer.

[0016] This device is equipped with solenoid valves at both the discharge port and the slag discharge port to control the discharge of internal materials and the cleaning of slag.

[0017] Preferably, a control panel is fixed to the left outer wall of one of the support legs.

[0018] The present invention proposes a device for effectively increasing the temperature of sintering mixtures, the beneficial effects of which are: By coordinating plate heat exchangers, flow regulating valves, water supply booster pumps, atomizing nozzles, and secondary mixing machines, and utilizing waste residue hot water heating technology, the mixture is atomized, humidified, and conditioned to maintain a suitable moisture content of 6%–8%, avoiding excessive moisture or dryness. This achieves a synergistic effect of "waste heat – mixture preheating – water saving," reducing sintering energy consumption by 10%–15% and simultaneously reducing wastewater treatment costs. The increased mixture temperature reduces water vapor condensation in the material layer, preventing the formation of an excessively wet layer and improving the mixture's permeability. Sintering speed is increased by 10%, drum strength by 1.3%, and the increased mixture temperature promotes complete fuel combustion, thereby reducing fuel consumption. Through the coordination of the servo motor, belt drive mechanism, ribbon agitator, upper water tank, lower water tank, and atomizing nozzle, the output shaft of the servo motor can drive the ribbon agitator to stir via the belt drive mechanism. At the same time, the rotating part of the ribbon agitator can directly drive the upper and lower water tanks to rotate inside the sleeve. Furthermore, due to the design of the sleeve and water holes, the waste hot water discharged from the water supply pipe can directly enter the rotating upper and lower water tanks through the water holes. Finally, it is sprayed out through the spray pipe and atomizing nozzle. The rotatable spray pipe and atomizing nozzle effectively improve the uniformity of mixing between waste hot water and materials, avoiding the problem of possible spray dead zones. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the external structure of the present invention; Figure 2 This is a schematic diagram of the left-side external structure of the present invention; Figure 3 This is a schematic diagram of the rear exterior structure of the present invention; Figure 4 For the present invention Figure 2 A schematic diagram of the structure of the two-stage mixer; Figure 5 For the present invention Figure 4 Schematic diagram of the right-side structure at the central spray assembly; Figure 6 For the present invention Figure 5 A schematic diagram of the sectional structure viewed from below; Figure 7 For the present invention Figure 6 A schematic diagram of the structure at point I in the diagram; Figure 8 This is a schematic diagram of the main structure of the present invention.

[0020] In the diagram: 1. Secondary mixer; 2. Support legs; 3. Water supply assembly; 301. Water supply pipe; 302. Plate heat exchanger; 303. Flow regulating valve; 304. Water supply booster pump; 305. Waste residue hot water pipe; 4. Spray assembly; 401. Spray pipe; 402. Atomizing nozzle; 403. Ribbon agitator; 404. Sleeve; 405. Upper water tank; 406. Lower water tank; 407. Water hole; 5. Belt drive mechanism; 6. Servo motor; 7. Top beam; 8. Discharge port; 9. Control panel; 10. Slag discharge port; 11. Heat exchange drain pipe; 12. Heat absorption drain pipe; 13. Heat exchange inlet pipe; 14. Heat absorption inlet pipe. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings: See attached document Figures 1-8 In this embodiment, an effective device for increasing the temperature of sintering secondary mixture includes a secondary mixer 1 and support legs 2. Support legs 2 are fixedly connected to the four corners of the lower end of the outer wall of the secondary mixer 1. Multiple top beams 7 are fixedly connected to the upper end of the secondary mixer 1. The model of the secondary mixer 1 can be determined according to the specific application. A servo motor 6 is fixedly connected to the upper right side of the outer wall of the secondary mixer 1. The model of the servo motor 6 can be determined according to the specific application. A belt drive mechanism 5 is installed on the output shaft of the servo motor 6. A spray assembly 4 is installed inside the secondary mixer 1. A water supply assembly 3 is distributed on the left side of the outer wall of the secondary mixer 1. A discharge port 8 is installed on the front side of the outer wall of the secondary mixer 1. Both the discharge port 8 and the slag discharge port 10 are equipped with solenoid valves for controlling the discharge of internal materials and the cleaning of slag. A slag discharge port 10 is installed at the lower part of the outer wall of the secondary mixer 1. A control panel 9 is fixedly connected to the left outer wall of one of the support legs 2.

[0022] See attached document Figures 1-8 In this embodiment, the water supply component 3 includes a water supply booster pump 304. A waste residue hot water pipe 305 is installed on the front left side of the water supply booster pump 304. The front right side of the water supply booster pump 304 is connected to a flow regulating valve 303 via a pipe. The models of the water supply booster pump 304 and the flow regulating valve 303 can be determined according to the specific application. Both the water supply booster pump 304 and the flow regulating valve 303 are connected to and controlled by the control panel 9. The front right side of the flow regulating valve 303 is connected to a plate heat exchanger 302 via a pipe. The plate heat exchanger 302 is connected to a water supply pipe 301 at the upper right corner of its front end. A heat exchange inlet pipe 13 and a heat exchange drain pipe 11 are installed at the lower left and upper right corners of the front end of the plate heat exchanger 302, respectively. The model of the plate heat exchanger 302 can be determined according to the specific application. The heat exchange inlet pipe 13 is connected to a flow regulating valve 303 through a pipe. The heat exchange drain pipe 11 is fixedly connected to the water supply pipe 301. A heat absorption drain pipe 12 and a heat absorption inlet pipe 14 are installed at the upper left and lower right corners of the front end of the plate heat exchanger 302, respectively.

[0023] See attached document Figures 1-8 In this embodiment, the spray assembly 4 includes a sleeve 404. The left outer wall of the sleeve 404 is fixedly connected to the end of the water supply pipe 301. The upper and lower sides of the inner wall of the sleeve 404 are rotatably connected to the upper water tank 405 through sealed bearings. The upper water tank 405 and the lower water tank 406 can be fixed and connected through a vertical pipe. The outer wall of the upper water tank 405 is processed with multiple water holes 407, and the lower outer side of the upper water tank 405 is fixedly connected to the lower water tank 406 through a vertical pipe. The outer wall of the lower water tank 406 is fixedly connected to the atomizing nozzle 402 through multiple spray pipes 401. The inner walls of the upper water tank 405 and the lower water tank 406 are fixedly connected to the rotating part of the ribbon agitator 403. The ribbon agitator 403 can feed the internal material upward and repeatedly agitate the material. The upper part of the ribbon agitator 403 is rotatably connected to the servo motor 6 through a belt drive mechanism 5.

[0024] Working principle: When this equipment is needed to effectively raise the temperature of the sintered mixed material, the user can first connect the entire structure together with pipes, and then start the water supply booster pump 304. The hot water generated after the blast furnace slag flushing treatment is filtered and pumped into the water supply booster pump 304. After being pressurized by the water supply booster pump 304, it is delivered to the plate heat exchanger 302. The waste hot water (90~110℃) is indirectly contacted for heat exchange through the corrugated plates, and the temperature is reduced to the temperature of the mixed material, which is 50~70℃. At the same time, the waste hot water is cooled down to 50~60℃ and reused (the heat absorption drain pipe 12 and heat absorption inlet pipe 14 in the plate heat exchanger 302 are used to connect the heating water pipe). The cooled waste hot water can be injected into the spray pipe 401 and the atomizing nozzle 402 through the water supply pipe 301 and finally sprayed out, so that the heat-exchanged hot water is evenly sprayed onto the surface of the mixed material, and the humidification and temperature increase of the mixed material are completed at the same time.

[0025] The main advantages and benefits of this work are as follows: 1. By using waste residue hot water heating technology, the mixture is atomized and humidified to maintain a suitable moisture content of 6% to 8%, avoiding excessive moisture or dryness. This achieves a synergistic effect of "waste heat - mixture preheating - water saving", which can reduce the energy consumption of the sintering process by 10% to 15% and reduce wastewater treatment costs.

[0026] 2. Increasing the temperature of the mixture reduces moisture condensation in the material layer, preventing the formation of an excessively wet layer and thus improving the permeability of the mixture. Sintering speed is increased by 10%, and drum strength is improved by 1.3% (TI increases from 76.5% to 77.8%). 3. Increasing the temperature of the mixture promotes more complete combustion of fuel, thereby reducing fuel consumption. The mixture temperature can be increased from 55℃ to 63-67℃, reducing solid fuel (coke powder) consumption by 1.5-2 kg / t. Based on an annual sintering production of 1.8 million tons, this can reduce coke costs by approximately RMB 4.1796 million (coke price RMB 1548 / t), while also reducing pollutant emissions from combustion.

[0027] When mixing materials at the secondary mixer 1 (materials can be fed in from the opening at the top of the secondary mixer 1), the servo motor 6 can be started, so that the output shaft of the servo motor 6 can drive the ribbon agitator 403 to mix through the belt drive mechanism 5. At the same time, the rotating part of the ribbon agitator 403 can directly drive the upper water tank 405 and the lower water tank 406 to rotate inside the sleeve 404. Furthermore, due to the setting of the sleeve 404 and the water hole 407, the waste hot water discharged from the water supply pipe 301 can directly enter the rotating upper water tank 405 and the lower water tank 406 through the water hole 407. Finally, it is sprayed out through the spray pipe 401 and the atomizing nozzle 402. The setting of the rotatable spray pipe 401 and the atomizing nozzle 402 effectively improves the uniformity of mixing between waste hot water and materials and avoids the problem of possible spray dead corners.

[0028] Finally, the specific operation process of this case can be controlled by the control panel 9, which can be operated by a PLC controller, including the linkage, start and stop, and data control of the water supply booster pump 304, servo motor 6 and flow regulating valve 303.

[0029] Although the present invention has been illustrated and described with reference to preferred embodiments, those skilled in the art will understand that various changes in form and detail are possible within the scope of the claims.

Claims

1. A device for effectively raising the temperature of a sintering secondary mixture, comprising a secondary mixer (1) and support legs (2), wherein support legs (2) are fixedly connected to the four corners of the lower end of the outer wall of the secondary mixer (1), characterized in that: Multiple top beams (7) are fixed to the upper end of the two-mix mixer (1), and a servo motor (6) is fixed to the upper right side of the outer wall of the two-mix mixer (1). The output shaft of the servo motor (6) is equipped with a belt drive mechanism (5). A spray assembly (4) is installed inside the two-mix mixer (1), and a water supply assembly (3) is distributed on the left side of the outer wall of the two-mix mixer (1).

2. The device for effectively increasing the temperature of the sintering mixture according to claim 1, characterized in that: The water supply assembly (3) includes a water supply booster pump (304). A waste residue hot water pipe (305) is installed on the front left side of the water supply booster pump (304). The front right side of the water supply booster pump (304) is connected to a flow regulating valve (303) through a pipe. The front right side of the flow regulating valve (303) is connected to a plate heat exchanger (302) through a pipe. A water supply pipe (301) is connected to the upper right corner of the front end of the plate heat exchanger (302).

3. The device for effectively increasing the temperature of the sintering mixture according to claim 2, characterized in that: The plate heat exchanger (302) has a heat exchange inlet pipe (13) installed at the lower left corner and a heat exchange outlet pipe (11) installed at the upper right corner. The heat exchange inlet pipe (13) is connected to the flow regulating valve (303) through a pipe, and the heat exchange outlet pipe (11) is fixedly connected to the water supply pipe (301).

4. The device for effectively increasing the temperature of the sintering mixture according to claim 2, characterized in that: The plate heat exchanger (302) has a heat absorption drain pipe (12) and a heat absorption water inlet pipe (14) installed at the upper left and lower right corners of its front end, respectively.

5. The device for effectively increasing the temperature of the sintering mixture according to claim 1, characterized in that: The spray assembly (4) includes a sleeve (404). The left outer wall of the sleeve (404) is fixedly connected to the end of the water supply pipe (301). The upper and lower sides of the inner wall of the sleeve (404) are rotatably connected to the upper water tank (405) through sealed bearings. The outer wall of the upper water tank (405) is machined with multiple water holes (407). The lower outer side of the upper water tank (405) is fixedly connected to the lower water tank (406) through a vertical pipe. The outer wall of the lower water tank (406) is fixedly connected to the atomizing nozzle (402) through multiple spray pipes (401).

6. The device for effectively increasing the temperature of the sintering mixture according to claim 5, characterized in that: The inner walls of the upper water tank (405) and the lower water tank (406) are fixedly connected to the rotating part of the ribbon agitator (403), and the upper part of the ribbon agitator (403) is rotatably connected to the servo motor (6) through the belt drive mechanism (5).

7. The device for effectively increasing the temperature of sintering secondary mixtures according to claim 1, characterized in that: The outer wall of the two-mix mixer (1) is equipped with a discharge port (8) and the outer wall of the two-mix mixer (1) is equipped with a slag discharge port (10).

8. The device for effectively increasing the temperature of the sintering mixture according to claim 1, characterized in that: A control panel (9) is fixed to the left outer wall of the support foot (2) on one side.

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