High-temperature blast furnace slag particle suspension efficient heat exchange complete solidification device

Abstract

The utility model discloses a high-temperature blast furnace slag particle suspension efficient heat exchange complete solidification device, which relates to the technical field of high-temperature blast furnace slag particle solidification and comprises a slag particle-water separation device and a cooling bed. A feeding channel is arranged above the slag particle and water separating device, the lower end of the material guiding channel is correspondingly arranged above an inlet of the cooling bed, and the cooling bed comprises a cooling bed body, four bed vibration amplitude limiting assemblies evenly arranged below the cooling bed body and a vibration assembly arranged below the cooling bed body. And a drainage hole is formed below the bottom plate of the cooling bed body. Slag particles and water are rapidly separated, so that the situation that the water cannot be controlled to take away excessive heat along with transferring of the slag particles, the target temperature after the slag particles are cooled cannot be achieved, and the rapid separation process is always within the water mist forced impact cooling coverage range; the loose and suspended slag particles are rapidly cooled under forced impact cooling of water mist, and then residual accumulated water generated in the spraying process of the slag particles is removed through drainage holes of the bed body.

Description

Technical Field

[0001] The utility model relates to the technical field of high-temperature blast furnace slag particle solidification, in particular to a high-temperature blast furnace slag particle suspension high-efficiency heat exchange and complete solidification device. Background Technique

[0002] At present, for the water granulation and waste heat recovery treatment of blast furnace slag, steam is generated by directly contacting water with blast furnace slag for heat exchange, and then a tubular heat exchanger is used to convert dirty steam into clean steam; or it is converted into hot water, with very low conversion efficiency, low temperature, low reuse value, and very low economic benefits. Content of the Utility Model

[0003] The technical problem solved by the utility model is to overcome the defects mentioned in the background technique and provide a high-temperature blast furnace slag particle suspension high-efficiency heat exchange and complete solidification device.

[0004] To achieve the above purpose, the utility model provides the following technical solution: a high-temperature blast furnace slag particle suspension high-efficiency heat exchange and complete solidification device, including a slag particle-water separation device and a cooling bed; a feeding channel is arranged above the slag particle-water separation device, and a guiding channel is corresponding to the lower end of the upper outlet of the slag particle-water separation device. The lower end of the guiding channel is corresponding to above the inlet of the cooling bed, and the outlet of the guiding channel is corresponding to a slag discharging channel. A high-pressure water spray device is evenly arranged above the cooling bed, and a mixed-flow water pump is arranged below the cooling bed. The mixed-flow water pump is connected to the water tank at the lower end of the slag particle-water separation device through a reflux pipeline.

[0005] The cooling bed includes a cooling bed body, four groups of bed vibration amplitude limiting components evenly arranged below the cooling bed body, and a vibration component arranged below the cooling bed body. Drainage holes are opened below the bottom plate of the cooling bed body, and the drainage holes are connected to the input port of the mixed-flow water pump.

[0006] Further, slag particle temperature detectors are arranged inside both the guiding channel and the slag discharging channel.

[0007] Further, an automatic control device is also provided. The automatic control device includes two groups of slag particle temperature detectors, a slag particle-water separation device, a high-pressure water spray device, a cooling bed, and an electrical control system.

[0008] Further, the vibration component includes a variable-frequency reduction motor, three vibration eccentric hammers installed on the bottom bracket of the cooling bed body, and four chain drive tensioning components. The variable-frequency reduction motor is connected to the side through a drive chain, and a chain drive tensioning component is installed at the middle position of the drive chain. At the same time, adjacent two groups of vibration eccentric hammers are connected through a drive chain with a chain drive tensioning component.

[0009] Furthermore, the slag granule water separation device and the cooling bed are installed obliquely, and the high-pressure water spray device arranged above the cooling bed sprays the upper end of the slag granule water separation device, and the water flows along the slag granule water separation device into the water tank below.

[0010] Furthermore, the slag granule water separation device includes a driving roller, three sets of reversing transmission rollers, a set of tensioning rollers, and a transmission track belt wound around the outside. A material plate is arranged on the outside of the lower transmission track belt. At the same time, baffle plates are evenly arranged on the transmission track belt, and the distance between the transmission track belt and the material plate is the same as the height of the baffle plates.

[0011] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0012] The slag granules and water are separated quickly to prevent excessive heat from being carried away by the water as the slag granules are transferred, so that the target temperature after the slag granules are cooled cannot be achieved. The quick separation process is always within the range of forced impact cooling by water mist, ensuring that the slag granules will not form agglomerated blocks.

[0013] After the discharged slag granules are detected by the slag granule temperature detector in the channel, they fall onto the input end of the blast furnace slag granule suspension cooling bed of the blast furnace slag granule suspension cooling device. The bed body vibrates violently under the action of the eccentric hammer vibration device. Since the eccentric hammer vibration device adopts a synchronous chain drive, the movement trajectories of multiple vibrating eccentric hammers are synchronous, achieving a large-area synchronous vibration effect, ensuring the efficient and stable suspension transfer of the slag granules. The slag granules are loosely suspended above the bed surface. The loosely suspended slag granules are quickly cooled under the forced impact cooling of water mist. Subsequently, the slag granules are discharged through the drainage holes in the bed body to remove the residual accumulated water generated during the spraying process. Description of the Drawings

[0014] Figure 1 It is a schematic structural flow diagram of the present utility model;

[0015] Figure 2 It is a schematic diagram of the slag granule water separation device of the structure of the present utility model;

[0016] Figure 3 It is a schematic diagram of the slag cooling bed of the structure of the present utility model.

[0017] Reference numerals in the drawings: 1, slag granule water separation device; 11, reversing transmission roller; 12, tensioning roller; 13, material plate; 14, transmission track belt; 15, driving roller; 2, feeding channel; 3, guiding channel; 4, high-pressure water spray device; 5, cooling bed; 51, vibration assembly; 511, variable frequency reduction motor; 512, chain drive tensioning assembly; 513, vibrating eccentric hammer; 514, transmission chain; 52, bed vibration amplitude limiting assembly; 53, cooling bed body; 54, drainage hole; 6, slag discharge channel; 7, mixed flow water pump; 8, return pipeline. Detailed Embodiments

[0018] Next, in combination with the accompanying drawings in the embodiments of the present utility model, the technical solutions in the embodiments of the present utility model will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

[0019] Please refer to Figures 1-3 , the present utility model provides a technical solution: a high-temperature blast furnace slag particle suspension high-efficiency heat exchange and complete solidification device, including a slag particle-water separation device 1 and a cooling bed 5; a feeding channel 2 is arranged above the slag particle-water separation device 1, and a guiding channel 3 is correspondingly arranged below the upper end outlet of the slag particle-water separation device 1. The lower end of the guiding channel 3 corresponds to above the inlet of the cooling bed 5, and the outlet of the guiding channel 3 corresponds to a slag discharging channel 6. A high-pressure water spray device 4 is uniformly arranged above the cooling bed 5, and a mixed-flow water pump 7 is arranged below the cooling bed 5. The mixed-flow water pump 7 is connected to the water tank at the lower end of the slag particle-water separation device 1 through a return pipeline 8;

[0020] The cooling bed 5 includes a cooling bed body 53, four groups of bed vibration amplitude limiting components 52 uniformly arranged below the cooling bed body 53, and a vibration component 51 arranged below the cooling bed body 53. A drain hole 54 is opened below the bottom plate of the cooling bed body 53, and the drain hole 54 is connected to the input port of the mixed-flow water pump 7.

[0021] Slag particle temperature detectors are arranged inside both the guiding channel 3 and the slag discharging channel 6.

[0022] An automatic control device is also provided. The automatic control device includes two groups of slag particle temperature detectors, a slag particle-water separation device 1, a high-pressure water spray device 4, a cooling bed 5, and an electrical control system.

[0023] The slag particle temperature detector inside the guiding channel 3 detects the temperature of the jet water granulated blast furnace slag particles and the particles after water separation. The rise and fall of this temperature reflect the change in the input flow rate of the blast furnace slag. When the temperature exceeds the set value, the control system will control the temperature value by controlling the high-pressure water spray to preliminarily control the temperature of the slag particles.

[0024] The slag particle temperature detector inside the slag discharging channel 6: detects the temperature of the slag particles output by the blast furnace slag particle suspension cooling device. This temperature is generally set at 750 - 850 °C. When the temperature exceeds the set value, the control system will control the temperature value by controlling the high-pressure water spray to finely control the temperature of the slag particles.

[0025] The vibration frequency of the cooling bed 5, i.e., the vibration frequency of the suspension cooling bed for blast furnace slag particles. The control system will control the output speed of the reducer by changing the power supply frequency of the variable-frequency reducer to achieve the change of the vibration frequency.

[0026] The vibration frequency is 20 - 30 Hz, and the average temperature inside and outside the slag particles is 750 - 850 °C. For the control of the particle temperature, a combination of preliminary control and fine control is adopted to improve the final control accuracy. When the input flow rate of the blast furnace slag changes, the equipment can operate stably. By changing the vibration frequency of the suspension cooling bed body of the blast furnace slag particles, the suspension characteristics of the slag particles meet the requirements.

[0027] The vibration assembly 51 includes a variable-frequency reduction motor 511, three groups of vibrating eccentric hammers 513 installed on the bottom bracket of the cooling bed body 53, and four groups of chain drive tensioning assemblies 512. The variable-frequency reduction motor 511 is connected to the 153 arranged on the side through a transmission chain 514, and a chain drive tensioning assembly 512 is installed at the middle position of the transmission chain 514. At the same time, adjacent two groups of vibrating eccentric hammers 513 are connected through a transmission chain 514 with a chain drive tensioning assembly 512. The cross-section of the bed body is U-shaped. The short dimension direction of the bed body is horizontally arranged, and the head of the bed body is high and the tail is low in the length direction, forming a certain angle with the horizontal plane. The size of the angle is preferably such that the thickness of the particle layers at the head and tail of the bed body bearing the slag particles is approximately equal during the operation of the device.

[0028] The slag particle water separation device 1 and the cooling bed 5 are inclinedly installed. The high-pressure water spray device 4 arranged above the cooling bed 5 sprays the upper end of the slag particle water separation device 1, and the water body flows along the slag particle water separation device 1 into the water tank below.

[0029] The slag particle water separation device 1 includes a driving roller 15 for driving, three groups of reversing transmission rollers 11, a tensioning roller 12, and a transmission track 14 wound around the outside. A material plate 13 is arranged outside the lower transmission track 14. At the same time, baffle plates are evenly arranged on the transmission track 14, and the distance between the transmission track 14 and the material plate 13 is the same as the height of the baffle plates. The slag particles are intercepted by the transmission track 14 that lifts the slag particles. The slag particles move rapidly towards the device outlet at a certain speed under the drive of the chain plate and are discharged. During the movement of the slag particles, due to the continuous forced impact cooling by water mist and the movement of individual slag particles, it is ensured that the slag particles will not form agglomerated blocks.

[0030] The blast furnace slag enters the slag granule water separation device 1 through the feeding channel 2; through the design of the driving track 14 and the material plate 13, the slag granules are intercepted and quickly moved. At the same time, the water mist is sprayed down from the high-pressure water spraying device 4 above to preliminarily cool and wash the slag granules to prevent the slag granules from sticking. The separated water flows into the water tank below, while the slag granules continue to move forward; the separated slag granules enter the cooling bed 5 through the guiding channel 3. A slag granule temperature detector is provided inside the guiding channel 3 to monitor the temperature of the slag granules in real time and provide feedback to the control system; when the temperature of the slag granules in the guiding channel 3 exceeds the set value, the control system will adjust the water spraying amount of the high-pressure water spraying device 4 to conduct preliminary temperature control on the slag granules.

[0031] After the slag granules enter the cooling bed 5, they are continuously cooled by the high-pressure water spraying device 4 from above; at the same time, the vibration assembly 51 of the cooling bed 5 starts to work. The vibration eccentric hammer 513 is driven by the variable-frequency reduction motor 511 to generate vibration, so that the slag granules remain loose during the cooling process and the cooling efficiency is improved. The vibration frequency is automatically adjusted according to the temperature of the slag granules and the cooling requirements, generally between 20 - 30 Hz. Vibration not only helps the slag granules to be loose and cooled, but also enables the slag granules to be evenly distributed on the cooling bed 5 to improve the cooling effect; the slag granules fully cooled by the cooling bed 5 enter the slag discharging channel 6; a slag granule temperature detector is also provided inside the slag discharging channel 6 to finally detect the temperature of the output slag granules; when the temperature of the slag granules in the slag discharging channel 6 exceeds the set value, generally set at 750 - 850 °C, the control system will further adjust the water spraying amount of the high-pressure water spraying device 4 to conduct fine temperature control on the slag granules to ensure that the temperature of the output slag granules meets the requirements; the mixed-flow water pump 7 and the return pipeline 8: The water generated during the cooling process and the water separated from the slag granules enter the mixed-flow water pump 7 through the drain hole 54, and after being treated, they return to the water tank of the slag granule water separation device 1 through the return pipeline 8 to realize the recycling of water.

[0032] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-temperature blast furnace slag particle suspension high-efficiency heat exchange and complete solidification device, comprising a slag particle-water separation device (1) and a cooling bed (5), characterized in that: Above the slag granule water separation device (1), there is a feeding channel (2) provided. And below the upper end outlet of the slag granule water separation device (1), there is a corresponding material guiding channel (3). The lower end of the material guiding channel (3) is corresponding above the inlet of the cooling bed (5), and the outlet of the material guiding channel (3) is corresponding to the slag discharging channel (6). Above the cooling bed (5), a high-pressure water spraying device (4) is evenly arranged. And below the cooling bed (5), a mixed-flow water pump (7) is provided. And the mixed-flow water pump (7) is connected to the water tank at the lower end of the slag granule water separation device (1) through a reflux pipeline (8). The cooling bed (5) includes a cooling bed body (53), four groups of bed vibration amplitude limiting components (52) evenly arranged below the cooling bed body (53), and a vibration component (51) arranged below the cooling bed body (53). And drainage holes (54) are opened below the bottom plate of the cooling bed body (53), and the drainage holes (54) are connected to the input port of the mixed-flow water pump (7).

2. The high-temperature blast furnace slag particle suspension high-efficiency heat exchange and complete solidification device according to claim 1, characterized in that: Slag granule temperature detectors are arranged inside both the material guiding channel (3) and the slag discharging channel (6).

3. The high-temperature blast furnace slag particle suspension high-efficiency heat exchange and complete solidification device according to claim 2, wherein: An automatic control device is also provided. The automatic control device includes two groups of slag granule temperature detectors, the slag granule water separation device (1), the high-pressure water spraying device (4), the cooling bed (5), and an electrical control system.

4. The high-temperature blast furnace slag particle suspension high-efficiency heat exchange and complete solidification device according to claim 3, characterized in that: The vibration component (51) includes a variable-frequency reduction motor (511), three vibration eccentric hammers (513) installed on the bottom bracket of the cooling bed body (53), and four chain drive tensioning components (512). And the variable-frequency reduction motor (511) is connected to the (153) arranged on the side through a transmission chain (514). And a chain drive tensioning component (512) is installed at the middle position of the transmission chain (514). At the same time, adjacent two groups of vibration eccentric hammers (513) are connected through a transmission chain (514) with a chain drive tensioning component (512).

5. The high-temperature blast furnace slag particle suspension high-efficiency heat exchange and complete solidification device according to claim 4, characterized in that: The slag granule water separation device (1) and the cooling bed (5) are installed obliquely. And the high-pressure water spraying device (4) arranged above the cooling bed (5) sprays the upper end of the slag granule water separation device (1), and the water body flows along the slag granule water separation device (1) into the water tank below.

6. The high-temperature blast furnace slag particle suspension high-efficiency heat exchange and complete solidification device according to claim 5, wherein: The slag granule water separation device (1) includes a driving driving roller (15), three groups of reversing transmission rollers (11), one tensioning roller (12), and a transmission track (14) surrounding the outside. And a material plate (13) is arranged on the outside of the lower transmission track (14). At the same time, baffle plates are evenly arranged on the transmission track (14), and the distance between the transmission track (14) and the material plate (13) is the same as the height of the baffle plates.

Images