Steel slag cooling waste heat recovery system

Abstract

A steel slag cooling waste heat recovery system includes a feeder capable of controlling the uniform drop of materials and sealingly storing them, an expansion joint connected to the feeder, a lower water collecting tank connected to the expansion joint, a heat exchange tube bundle material silo formed by alternatingly welding heat exchange tube bundles and baffles to form a silo body connected to the lower water collecting tank, an upper water collecting tank connected to the heat exchange tube bundle material silo, a feed box mounted on the top surface of the heat exchange tube bundle material silo, an air outlet duct body located outside and covering the air outlet of the lower cavity of the heat exchange tube bundle material silo and mounted on the top surface of the lower water collecting tank, and an air inlet duct body with a downwardly inclined air inlet at the bottom, formed by alternatingly welding heat exchange tube bundles and baffles to form a silo body and mounted on the top surface of the lower water collecting tank. The present invention utilizes waste heat recovery and water recycling, eliminates wastewater discharge, and achieves high cooling efficiency, achieving comprehensive utilization of steel slag resources and waste. It can be widely used in the field of high-temperature granular steel slag material processing.

Description

Technical Field

[0001] The invention relates to a steel slag cooling waste heat recovery system, which can be widely used in the field of high-temperature granular steel slag material processing. Background Art

[0002] Steel slag is one of the main waste products produced during steel production, accounting for 13% of crude steel output. Currently, slag is treated using water contact heat exchange, which requires significant water resources for cooling. This leads to significant water waste, slow cooling rates, and environmental pollution. Furthermore, the temperature of the slag produced ranges from 1400 to 1600°C. Molten slag carries a significant amount of sensible heat and contains a significant amount of thermal energy. This sensible heat is not recycled, resulting in energy waste. Summary of the Invention

[0003] The purpose of the present invention is to provide a steel slag cooling waste heat recovery system which can recover and utilize waste heat, recycle water, discharge no wastewater, have high cooling efficiency and realize comprehensive utilization of steel slag resource waste.

[0004] In order to achieve the above-mentioned purpose, the steel slag cooling waste heat recovery system of the present invention includes a feeder that can control the uniform falling of materials and can seal and store materials, an expansion joint connected to the feeder, a lower water collecting box connected to the expansion joint, a heat exchange tube bundle material bin formed by alternately welding heat exchange tube bundles and partitions, and connected to the lower water collecting box, an upper water collecting box connected to the heat exchange tube bundle material bin, a feed box installed on the top surface of the heat exchange tube bundle material bin, an air outlet body located outside the air outlet of the lower cavity of the heat exchange tube bundle material bin and covering the air outlet, installed on the top surface of the lower water collecting box, a downward-inclined air inlet is provided at the bottom, a bin formed by alternately welding heat exchange tube bundles and partitions and installed on the top of the lower water collecting box The air inlet duct body on the surface; the heat exchange tube bundle material bin, including an upper storage bin, a middle sealing bin, and a lower heat exchange bin with an upward inclined air outlet; the lower heat exchange bin, including a bin body air outlet baffle with an air outlet hole, an air outlet filter installed on the lower heat exchange bin body, a pair of inclined air outlet baffles located above and below the air outlet, installed on the air outlet filter, and forming an upward inclined air outlet; the air inlet duct body, including an air inlet baffle with an air inlet hole, an air inlet filter installed on the air inlet duct body, a pair of inclined air inlet baffles located above and below the air inlet hole, installed on the air inlet filter, and forming a downward inclined air inlet.

[0005] The slag cooling waste heat recovery system of the present invention comprises an inclined air outlet baffle plate, and vertical air outlet baffle plates provided at both ends of the inclined air outlet baffle plate.

[0006] In the steel slag cooling waste heat recovery system of the present invention, the angle between the axis of the upwardly inclined air outlet and the longitudinal axis is 30° to 45°.

[0007] The steel slag cooling waste heat recovery system of the present invention comprises an inclined air inlet baffle plate and vertical air inlet baffle plates provided at both ends of the inclined air inlet baffle plate.

[0008] In the steel slag cooling waste heat recovery system of the present invention, the angle between the axis of the downwardly inclined air inlet and the longitudinal axis is 30° to 45°.

[0009] The steel slag cooling waste heat recovery system of the present invention has a heat exchange tube bundle filled with cooling water and connected to a lower water collecting tank and an upper water collecting tank.

[0010] In the steel slag cooling waste heat recovery system of the present invention, the heat exchange tube bundle is a round tube or a special-shaped tube.

[0011] In the steel slag cooling waste heat recovery system of the present invention, the air outlet duct body covers the air outlet holes and is used for the hot air to be discharged from the channel after cooling; the air inlet duct body covers the air inlet holes and is used for the cold air to be collected and enter the channel before cooling.

[0012] The steel slag cooling waste heat recovery system of the present invention adopts dual measures to prevent steel slag materials from entering the cooling air system: first, an air outlet filter and an air inlet filter are used to prevent steel slag materials from falling into the cooling air system; second, inclined air outlet baffles and inclined air inlet baffles are provided to block the steel slag and make it fall back into the lower heat exchange bin.

[0013] The slag cooling and waste heat recovery system of the present invention operates by combining air and water to cool the slag. Water flows within the heat exchange tube bundle, exchanging heat between the high-temperature slag and the cooling water within the bundle. This indirectly cools the high-temperature slag through water-interlayer heat exchange. The bundle absorbs the sensible heat of the slag, performing heat exchange. Simultaneously, the cooling air directly contacts the high-temperature slag, cooling the material. The cooling air then passes through the slag layer, absorbing the sensible heat and becoming hot air, completing the heat exchange.

[0014] The present invention's slag cooling waste heat recovery system utilizes an air inlet and outlet cooling system. Cooling air enters the air inlet of the air inlet, passes through the inner cavity of the air inlet, and through the air inlet holes and filter screen on the air inlet side before entering the cavity of the lower heat exchange chamber. The cooling air penetrates the slag in the cavity, cooling it. The cooling air then passes through the filter screen and air outlet holes on the air outlet side and enters the cavity of the air outlet, finally being discharged through the air outlet of the air outlet. After directly exchanging heat with the high-temperature slag, the cooling air becomes high-temperature hot air, and the sensible heat of the slag is recovered and utilized as waste heat from the high-temperature hot air.

[0015] The present invention's steel slag cooling waste heat recovery system features a heat exchange tube bundle filled with cooling water, which is connected to a lower header tank and an upper header tank, forming a cooling water circulation system. Cooling water enters all heat exchange tube bundles from the lower header tank and is collected by the upper header tank. After heat exchange with the high-temperature steel slag, a high-temperature steam-water mixture is obtained, thus recovering the waste heat from the high-temperature steel slag. The cooling water from the high-temperature steam-water mixture after waste heat recovery can be recycled, eliminating wastewater discharge.

[0016] The steel slag cooling waste heat recovery system of the present invention adopts an inclined air inlet baffle and an inclined air outlet baffle structure, and sets the air inlet and air outlet holes relatively inclined, which can increase the internal steel slag fluidity and at the same time increase the heat exchange cycle, and has high cooling efficiency.

[0017] In the steel slag cooling waste heat recovery system of the present invention, since water does not directly contact the steel slag and does not destroy the activity of the steel slag, the iron and steel components therein can be extracted by magnetic separation, and the remaining parts can be comprehensively utilized as building materials, thereby realizing the comprehensive utilization of steel slag resource waste.

[0018] In summary, the steel slag cooling waste heat recovery system of the present invention recovers waste heat, recycles water, has no wastewater discharge, has high cooling efficiency, and realizes the comprehensive utilization of steel slag resource waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments thereof.

[0020] Figure 1 It is a structural schematic diagram of the present invention;

[0021] Figure 2 yes Figure 1 AA section view in;

[0022] Figure 3 yes Figure 1 BB cross-sectional view in;

[0023] Figure 4 yes Figure 1 CC cross-sectional view;

[0024] Figure 5 yes Figure 1 A local enlarged view of point Ⅰ in FIG;

[0025] Figure 6 yes Figure 1 A magnified view of the part II in the figure. DETAILED DESCRIPTION

[0026] exist Figures 1 to 6In the present invention, the steel slag cooling waste heat recovery system includes a feeder 1 that can control the uniform falling of materials and can seal and store materials, an expansion joint 2 connected to the feeder, a lower water collecting box 3 connected to the expansion joint, a heat exchange tube bundle material bin 4 composed of a heat exchange tube bundle 9 and a partition 10 alternately welded to form a bin body and connected to the lower water collecting box, an upper water collecting box 5 connected to the heat exchange tube bundle material bin, a feed box 6 installed on the top surface of the heat exchange tube bundle material bin, an air outlet duct body 7 located outside the air outlet of the lower cavity of the heat exchange tube bundle material bin and covering the air outlet, and installed on the top surface of the lower water collecting box, a downwardly inclined air inlet b is provided at the bottom, an air inlet duct body 8 composed of a heat exchange tube bundle 9 and a partition 10 alternately welded to form a bin body and installed on the top surface of the lower water collecting box; the heat exchange tube bundle material The bin 4 comprises an upper material storage bin 4-1, a middle sealed bin 4-2, and a lower heat exchange bin 4-3 provided with an upwardly inclined air outlet a; the lower heat exchange bin 4-3 comprises a bin body air outlet baffle 4-3-1 provided with an air outlet hole c, an air outlet filter 4-3-2 installed on the bin body of the lower heat exchange bin, a pair of inclined air outlet deflectors 4-3-3 located above and below the air outlet, installed on the air outlet filter, and forming an upwardly inclined air outlet a; the air inlet duct body 8 comprises an air inlet baffle 8-1 provided with an air inlet hole d, an air inlet filter 8-2 installed on the bin body of the air inlet duct, a pair of inclined air inlet deflectors 8-3 located above and below the air inlet, installed on the air inlet filter, and forming a downwardly inclined air inlet b.

[0027] The slag cooling waste heat recovery system of the present invention, the inclined air outlet baffle 4-3-3, is composed of an inclined air outlet guide plate 4-3-3-1 and vertical air outlet guide plates 4-3-3-2 set at both ends of the inclined air outlet guide plate.

[0028] In the steel slag cooling waste heat recovery system of the present invention, the angle α between the axis of the upwardly inclined air outlet a and the longitudinal axis is 30° to 45°.

[0029] The slag cooling waste heat recovery system of the present invention, the inclined air inlet baffle 8-3, is composed of an inclined air inlet guide plate 8-3-1 and vertical air inlet guide plates 8-3-2 set up at both ends of the inclined air inlet guide plate.

[0030] In the steel slag cooling waste heat recovery system of the present invention, the angle β between the axis of the downwardly inclined air inlet b and the longitudinal axis is 30° to 45°.

[0031] In the steel slag cooling waste heat recovery system of the present invention, the heat exchange tube bundle 9 is filled with cooling water and is connected to the lower water collecting tank and the upper water collecting tank.

[0032] In the steel slag cooling waste heat recovery system of the present invention, the heat exchange tube bundle 9 is a round tube or a special-shaped tube.

[0033] To sum up, the above are only preferred embodiments of the present invention and are not intended to limit the present invention in any form. Although the present invention has been disclosed as above in the form of preferred embodiments, it is not intended to limit the present invention. Any technician familiar with this profession can make some changes or modifications to equivalent embodiments of equivalent changes using the technical content disclosed above without departing from the scope of the technical solution of the present invention. However, any simple modifications, equivalent replacements and improvements made to the above embodiments without departing from the content of the technical solution of the present invention, based on the technical essence of the present invention, within the spirit and principles of the present invention, still fall within the scope of protection of the technical solution of the present invention.

Claims

1. A steel slag cooling waste heat recovery system, characterized in that: It includes a feeder that can control the uniform falling of materials and can seal and store materials, an expansion joint connected to the feeder, a lower water collecting box connected to the expansion joint, a heat exchange tube bundle material bin formed by alternately welding heat exchange tube bundles and partitions and connected to the lower water collecting box, an upper water collecting box connected to the heat exchange tube bundle material bin, a feed box installed on the top surface of the heat exchange tube bundle material bin, an air outlet duct body located outside the air outlet hole of the lower cavity of the heat exchange tube bundle material bin and covering the air outlet hole and installed on the top surface of the lower water collecting box, an air inlet body provided at the bottom with a downwardly inclined air inlet, a bin body formed by alternately welding heat exchange tube bundles and partitions and installed on the top surface of the lower water collecting box; The heat exchange tube bundle material bin includes an upper storage bin, a middle sealed bin, and a lower heat exchange bin with an upwardly inclined air outlet; the lower heat exchange bin includes a bin body air outlet baffle with air outlet holes, an air outlet filter installed on the bin body of the lower heat exchange bin, a pair of inclined air outlet baffles located above and below the air outlet, installed on the air outlet filter, and forming an upwardly inclined air outlet; the air inlet duct body includes an air inlet baffle with air inlet holes, an air inlet filter installed on the bin body of the air inlet duct, a pair of inclined air inlet baffles located above and below the air inlet holes, installed on the air inlet filter, and forming a downwardly inclined air inlet.

2. The steel slag cooling waste heat recovery system according to claim 1, characterized in that: The inclined air outlet baffle is composed of an inclined air outlet guide plate and vertical air outlet guide plates set up at both ends of the inclined air outlet guide plate.

3. The steel slag cooling waste heat recovery system according to claim 1, characterized in that: The angle between the axis of the upwardly inclined air outlet and the longitudinal axis is 30° to 45°.

4. The steel slag cooling waste heat recovery system according to claim 1, characterized in that: The inclined air inlet deflector is composed of an inclined air inlet guide plate and vertical air inlet guide plates set up at both ends of the inclined air inlet guide plate.

5. The steel slag cooling waste heat recovery system according to claim 1, characterized in that: The angle between the axis of the downwardly inclined air inlet and the longitudinal axis is 30° to 45°.

6. The steel slag cooling waste heat recovery system according to claim 1, characterized in that: The heat exchange tube bundle is filled with cooling water and is connected to the lower water collecting tank and the upper water collecting tank.

7. The steel slag cooling waste heat recovery system according to claim 1, characterized in that: The heat exchange tube bundle is a round tube or a special-shaped tube.

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