Circular slag crushing and waste heat recovery system

Abstract

A ring-type circulating steel slag crushing and waste heat recovery processing system includes an outer ring-type support track, an inner ring-type support track, an upper open-type ring-type silo rotating bed, a ring-type guide rail, a guide wheel, a vertical rotary drive motor, a rotary driving gear, a ring-type follower, a fixedly installed lower open-type fixed ring-type silo shell, a water-cooled rotary crusher, a cooling air inlet duct installed on the upper part of the fixed ring-type silo shell, a feed door installed on the top feed port of the fixed ring-type silo shell, a high-temperature air outlet duct installed near the top feed port of the fixed ring-type silo shell, and a discharge door installed on the bottom discharge port of the ring-type silo rotating bed. The present invention has a compact structure, a small footprint, high crushing efficiency, waste heat recovery, environmental protection, and realizes the automation of steel slag processing, reduces labor costs, saves operating costs, and realizes comprehensive resource utilization. It can be widely used in the field of steel slag processing.

Description

Technical Field

[0001] The invention relates to a ring-type circulating steel slag crushing and waste heat recovery processing system, which can be widely used in the field of steel slag processing. Background Art

[0002] Steel slag is a by-product of the steelmaking process. During the steel production process, the output of steel slag is huge. At present, the main methods used to treat steel slag are hot pouring, hot stewing, water quenching and drum method.

[0003] (1) The hot pouring method uses water as a medium to cool the hot slag. The slag is cooled to 350-400℃ by air and then sprayed with an appropriate amount of water. The slag is rapidly cooled and broken. This method has poor slag-iron separation effect, unqualified tailings stability, and is difficult to recycle. It also occupies a large area, has a long treatment cycle, and has unorganized flue gas emissions.

[0004] (2) The hot stuffing method is to cool the hot molten slag to 800-300℃ and then put it into the hot stuffing device to spray the hot slag to produce saturated steam, which reacts with the free calcium oxide and free magnesium oxide in the slag to make the slag self-decomposition and powderization, thereby achieving the purpose of slag crushing. In this method, the waste heat cannot be utilized and the particle size of the slag cannot be guaranteed.

[0005] (3) The water quenching method is that the high-temperature liquid slag is divided and crushed by pressure during the outflow and descent process, and the high-temperature slag is rapidly cooled and contracted by water to produce stress concentration and rupture. At the same time, heat exchange is carried out, so that the slag is granulated in the water curtain. This method requires the slag to have good fluidity, otherwise it is easy to explode during operation.

[0006] (4) The drum method is that liquid slag is slowly poured from a special container into a tilted rotating drum, sprayed with water in the drum to rapidly cool it, and then collides and grinds with steel balls placed in the drum to be broken into smaller particles. This method is suitable for processing slag with good fluidity, but it has high energy consumption, the slag is not easy to be crushed and granulated, and it causes serious wear on the equipment.

[0007] The above-mentioned slag treatment method is prone to cause environmental pollution, water resource waste, and iron resource loss. In addition, the molten slag produced during the steelmaking process contains a large amount of heat energy, which could have been recycled but is wasted. Therefore, the utilization rate of slag is low and resources are seriously wasted. Summary of the invention

[0008] The purpose of the present invention is to provide a ring-type circulation steel slag crushing and waste heat recovery treatment system with compact structure, small footprint, high crushing efficiency, waste heat recovery and utilization, environmental protection, automation of steel slag treatment, reduction of manpower costs, saving of operating costs, and comprehensive utilization of resources.

[0009] In order to achieve the above-mentioned purpose, the annular circulating slag crushing and waste heat recovery treatment system of the present invention comprises an outer annular support track, an inner annular support track located inside the outer annular support track, an upper open annular silo rotating bed provided with support wheels at the bottom and rotating around the outer annular support track and the inner annular support track through the support wheels, an annular guide rail installed on the outer wall of the annular silo rotating bed, a plurality of guide wheels used for guiding the annular guide rail and fixedly installed, a vertical rotary drive motor fixedly installed below the annular silo rotating bed, a rotary driving gear installed on the output shaft of the vertical rotary drive motor, an annular follower fixedly installed on the annular silo rotating bed that meshes with the rotary driving gear and is driven by the rotary driving gear, a lower open fixed annular silo shell that is sealed and fixedly connected to the annular silo rotating bed through an inner mechanical seal and an outer mechanical seal, a water-cooled rotary crusher on the annular silo installed on the fixed annular silo shell, a cooling air inlet duct installed on the upper part of the fixed annular silo shell, a feed door installed on the feed inlet at the top of the fixed annular silo shell, and a feed port near the top of the fixed annular silo shell. a high-temperature air outlet pipe installed at the outlet of the fixed annular silo, and a discharge door installed on the discharge port at the bottom of the annular silo rotating bed; the water-cooled rotary crusher comprises a crushing drive motor fixedly installed outside the fixed annular silo shell, a crushing active gear installed on the output shaft of the crushing drive motor, a crushing driven gear meshing with the crushing active gear and driven by the crushing active gear, a hollow rotating shaft with a blocking plate in the center and a plurality of transverse small holes in the middle, installed on the fixed annular silo shell and fixedly installed on the crushing driven gear, fixed bearing seats located at both ends of the rotating shaft for supporting the rotation of the rotating shaft, an inlet rotary joint connected to the outer end of the hollow rotating shaft, a cooling water inlet pipe fixedly connected and fixedly installed to the inlet rotary joint, an outlet rotary joint connected to the inner end of the hollow rotating shaft, a cooling water outlet pipe fixedly connected and fixedly installed to the outlet rotary joint, a hollow rotating crushing roller located in the annular silo formed by the fixed annular silo shell and the annular silo rotating bed, surrounding the transverse small holes of the hollow rotating shaft and fixedly installed on the hollow rotating shaft, and slag block crushing teeth arranged in a spiral shape and installed on the hollow rotating crushing roller.

[0010] The annular circulating slag crushing and waste heat recovery processing system of the present invention, the annular driven member is a driven gear ring.

[0011] The ring-type circulating steel slag crushing and waste heat recovery processing system of the present invention, the feed door is an automatic or manual opening and closing sealing door.

[0012] The ring-type circulating steel slag crushing and waste heat recovery processing system of the present invention, the discharge door is an automatic or manual opening and closing sealing door.

[0013] The annular circulating slag crushing and waste heat recovery processing system of the present invention, the annular driven member is a driven chain.

[0014] The working principle of the ring-type circulating slag crushing and waste heat recovery treatment system of the present invention is:

[0015] (1) The normally closed feeding door is opened, and the high-temperature steel slag to be processed is dumped onto the annular rotating bed at a certain rate. At this time, a slag layer is formed on the annular rotating bed. The formed slag layer moves along the annular rotating bed toward the location of the hollow rotating crushing roller. During the movement, the slag layer is crushed by the slag block crushing teeth. After the crushed steel slag particles fall from the discharge port after the normally closed discharging door is opened.

[0016] (2) The vertical rotary drive motor drives the rotating driving gear to rotate, and drives the annular driven member to rotate through meshing transmission, thereby driving the annular silo rotating bed to rotate, and driving the steel slag entering from the feed port to rotate in the annular silo. At the same time, the crushing drive motor drives the crushing driving gear to rotate, and drives the crushing driven gear to rotate through gear transmission, driving the hollow rotating shaft to rotate, thereby driving the hollow rotating crushing roller to rotate. In this way, the hollow rotating crushing roller not only rotates with the hollow rotating shaft, but also revolves with the annular silo rotating bed, driving the slag crushing teeth to rotate, and the slag crushing teeth stir the high-temperature steel slag, causing the steel slag to accumulate, roll, crush, and granulate.

[0017] (3) The cooling water enters the interior of the rotating shaft from the cooling water inlet pipe, and enters the cavity of the hollow rotating crushing roller through the transverse hole to cool the hollow rotating crushing roller and the slag. Then, the cooling water enters the inner end of the rotating shaft and flows out from the cooling water outlet pipe.

[0018] (4) Cooling air continuously enters from the cooling air inlet and flows in the sealed space formed by the fixed annular silo shell and the annular rotating bed, cooling the high-temperature slag and absorbing heat at the same time. The high-temperature air after absorbing the heat is discharged from the high-temperature air outlet, and the waste heat of the high-temperature air is recovered and utilized, with significant economic benefits.

[0019] The ring-type circulating steel slag crushing and waste heat recovery treatment system of the present invention adopts a ring-type structure, has a compact structure and occupies a small area.

[0020] The annular circulation steel slag crushing and waste heat recovery treatment system of the present invention adopts an annular rotating bed and a hollow rotating crushing roller as core components for cooling and crushing the high-temperature steel slag. The annular rotating bed serves as a carrier for steel slag treatment, carrying the high-temperature steel slag entering from the feed port for rotational motion. The hollow rotating crushing roller is installed in an annular cavity formed by a fixed annular silo shell and the annular rotating bed to perform self-rotation motion to crush the high-temperature steel slag. The crushing roller is equipped with slag block crushing teeth arranged in a spiral shape, and water is passed through the crushing roller to cool the crushing roller, so that the crushing treatment efficiency is high.

[0021] The ring-type circulating slag crushing and waste heat recovery processing system of the present invention uses air cooling to cool the high-temperature slag during the crushing process, and then collects and utilizes the high-temperature air that absorbs heat, that is, recovers the waste heat.

[0022] The circular circulation slag crushing and waste heat recovery treatment system of the present invention has no steam and smoke spillage during the slag treatment process, fundamentally solves the problem of unorganized emission of dust-containing smoke in the slag treatment process, and is environmentally friendly.

[0023] The ring-type circulating slag crushing and waste heat recovery treatment system of the present invention adopts a dual power mechanism of a vertical rotary drive motor and a crushing drive motor to realize the automation of slag treatment, reduce labor costs, and save operating costs.

[0024] The circular circulation steel slag crushing and waste heat recovery treatment system of the present invention can facilitate good recovery of heat and ferrous resources in the crushed steel slag, while avoiding environmental pollution by dumping. Therefore, the steel slag crushing treatment can achieve comprehensive resource utilization and environmental protection.

[0025] In summary, the circular circulation slag crushing and waste heat recovery treatment system of the present invention has a compact structure, occupies a small area, has high crushing treatment efficiency, recovers waste heat, is environmentally friendly, realizes the automation of slag treatment, reduces manpower costs, saves operating costs, and realizes comprehensive resource utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The present invention will be further described below in conjunction with the accompanying drawings and embodiments thereof.

[0027] Figure 1 It is a schematic diagram of the structure of the present invention;

[0028] Figure 2 yes Figure 1 A top view of the

[0029] Figure 3 It is a schematic diagram of another transmission structure of the meshing of a rotating driving gear and an annular driven member in the present invention. DETAILED DESCRIPTION

[0030] exist Figure 1 to Figure 3The annular circulating slag crushing and waste heat recovery treatment system of the present invention comprises an outer annular support track 1, an inner annular support track 2 located inside the outer annular support track, a support wheel 15 is provided at the bottom, and an upper open annular silo rotating bed 3 rotates around the outer annular support track and the inner annular support track through the support wheel, an annular guide rail 4 installed on the outer wall of the annular silo rotating bed, a plurality of guide wheels 5 fixedly installed and used for guiding the annular guide rail, a vertical rotary drive motor 6 fixedly installed below the annular silo rotating bed, and a rotary driving gear 7 installed on the output shaft of the vertical rotary drive motor, which meshes with the rotary driving gear The annular driven member is fixedly mounted on the annular silo rotating bed and is driven by a rotating driving gear; a lower opening fixed annular silo shell 9 is sealed and fixedly mounted to the annular silo rotating bed through an inner mechanical seal 16 and an outer mechanical seal 17; a water-cooled rotary crusher 10 is mounted on the annular silo of the fixed annular silo shell; a cooling air inlet duct 11 is mounted on the upper part of the fixed annular silo shell; a feed door 12 is mounted on the feed inlet at the top of the fixed annular silo shell; a high-temperature air outlet duct 13 is installed near the feed inlet at the top of the fixed annular silo shell; and a The water-cooled rotary crusher 10 comprises a crushing drive motor 10-1 fixedly mounted outside the fixed annular silo shell, a crushing driving gear 10-2 mounted on the output shaft of the crushing drive motor, a crushing driven gear 10-3 meshing with the crushing driving gear and driven by the crushing driving gear, a hollow rotating shaft 10-4 with a plugging plate 10-12 in the center and a plurality of transverse small holes 10-13 in the middle, mounted on the fixed annular silo shell and fixedly mounted on the crushing driven gear, and fixed bearing seats 10-13 located at both ends of the rotating shaft for supporting the rotation of the rotating shaft. -5, an inlet rotary joint 10-6 connected to the outer end of the hollow rotating shaft, a cooling water inlet pipe 10-7 fixedly connected to the inlet rotary joint and fixedly installed, an outlet rotary joint 10-8 connected to the inner end of the hollow rotating shaft, a cooling water outlet pipe 10-9 fixedly connected to the outlet rotary joint and fixedly installed, a hollow rotating crushing roller 10-10 located in the annular silo formed by the fixed annular silo shell and the annular silo rotating bed, surrounding the transverse small hole of the hollow rotating shaft and fixedly installed on the hollow rotating shaft, and a slag block crushing tooth 10-11 arranged in a spiral shape and installed on the hollow rotating crushing roller.

[0031] In the annular circulating slag crushing and waste heat recovery treatment system of the present invention, the annular driven member is the driven gear ring 8.

[0032] The ring-type circulating steel slag crushing and waste heat recovery processing system of the present invention, the feed door is an automatic or manual opening and closing sealing door.

[0033] The ring-type circulating steel slag crushing and waste heat recovery processing system of the present invention, the discharge door is an automatic or manual opening and closing sealing door.

[0034] exist Figure 3 In the annular circulating slag crushing and waste heat recovery processing system of the present invention, the annular follower is a driven chain 18.

[0035] exist Figure 1 In the figure, the arrow indicates the cooling water flow direction a, and the arrow indicates the cooling air flow direction b.

[0036] The annular circulation slag crushing and waste heat recovery treatment system of the present invention is only described above as a preferred embodiment of the present invention, and does not impose any form of limitation on the present invention. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technician familiar with this profession can make some changes or modify the technical contents disclosed above into equivalent embodiments with equivalent changes without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent replacement and improvement of the above embodiments made according to the technical essence of the present invention, within the spirit and principles of the present invention, still fall within the protection scope of the technical solution of the present invention.

Claims

1. A ring-type circulating slag crushing and waste heat recovery processing system, characterized in that: The invention comprises an outer annular support track, an inner annular support track located inside the outer annular support track, an upper open annular silo rotating bed provided with support wheels at the bottom and rotating around the outer annular support track and the inner annular support track through the support wheels, an annular guide rail installed on the outer wall of the annular silo rotating bed, a plurality of guide wheels fixedly installed for guiding the annular guide rail, a vertical rotary drive motor fixedly installed below the annular silo rotating bed, a rotary driving gear installed on the output shaft of the vertical rotary drive motor, an annular follower fixedly installed on the annular silo rotating bed that meshes with the rotary driving gear and is driven by the rotary driving gear, a lower open fixed annular silo shell that is sealed and fixedly connected to the annular silo rotating bed through an inner mechanical seal and an outer mechanical seal, a water-cooled rotary crusher on the annular silo installed on the fixed annular silo shell, a cooling air inlet duct installed on the upper part of the fixed annular silo shell, a feed door installed on the top feed port of the fixed annular silo shell, a high-temperature air outlet duct installed near the top feed port of the fixed annular silo shell, and a a discharge door on the bottom discharge port of the annular silo rotating bed; the water-cooled rotary crusher comprises a crushing drive motor fixedly installed outside the fixed annular silo shell, a crushing active gear installed on the output shaft of the crushing drive motor, a crushing driven gear meshing with the crushing active gear and driven by the crushing active gear, a hollow rotating shaft with a blocking plate in the center and a plurality of transverse small holes in the middle, installed on the fixed annular silo shell and fixedly installed on the crushing driven gear, fixed bearing seats located at both ends of the rotating shaft for supporting the rotation of the rotating shaft, an inlet rotary joint connected to the outer end of the hollow rotating shaft, a cooling water inlet pipe fixedly connected and fixedly installed to the inlet rotary joint, an outlet rotary joint connected to the inner end of the hollow rotating shaft, a cooling water outlet pipe fixedly connected and fixedly installed to the outlet rotary joint, a hollow rotary crushing roller located in the annular silo formed by the fixed annular silo shell and the annular silo rotating bed, surrounding the transverse small holes of the hollow rotary shaft and fixedly installed on the hollow rotary shaft, and slag block crushing teeth arranged in a spiral shape and installed on the hollow rotary crushing roller.

2. The ring-type circulating steel slag crushing and waste heat recovery processing system according to claim 1 is characterized in that: The annular driven member is a driven gear ring.

3. The ring-type circulating steel slag crushing and waste heat recovery processing system according to claim 1 is characterized in that: The feed door is an automatic or manual opening and closing sealing door.

4. The ring-type circulating steel slag crushing and waste heat recovery processing system according to claim 1 is characterized in that: The discharge door is an automatic or manual opening and closing sealing door.

5. The ring-type circulating steel slag crushing and waste heat recovery processing system according to claim 1 is characterized in that: The annular driven member is a driven chain.

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