High-temperature solid slag cooling, conveying and processing system

Abstract

A high-temperature solid steel slag cooling, conveying and processing system includes a steel slag conveyor, a slag bin, a steel slag cooling waste heat recovery device equipped with an upper water collecting tank, a lower water collecting tank, an air inlet duct body, and an air outlet duct body and installed on the steel slag conveyor, a plurality of blowers connected to the air inlet duct body via an air inlet pipe, a steam drum connected to the upper water collecting tank via a water pipe, a water supply pipe, a water supply pump, a circulating water pipe connected to the steam drum at one end and to the lower water collecting tank at the other end, a circulating water pump, a steam output pipe installed on the steam drum, a plurality of air outlet pipes connected to the air outlet duct body, a dust collector installed on the air outlet pipe, and a hot air waste heat utilization pipe installed on the output end of the dust collector. The high-temperature solid steel slag cooling, conveying and processing system of the present invention has high cooling efficiency, waste heat recovery and utilization, energy conservation and environmental protection, comprehensive utilization of steel slag waste, and no wastewater discharge. It can be widely used in the field of cooling and processing of high-temperature granular steel slag materials in the metallurgical industry.

Description

Technical Field

[0001] The present invention relates to a high-temperature solid steel slag cooling, conveying and processing system, which can be widely used in the field of cooling and processing high-temperature granular steel slag materials in the metallurgical industry. Background Art

[0002] Steel slag is a major waste product generated during the steel industry's production process, accounting for 13% of crude steel output. With a temperature of 1400-1600°C, steel slag carries a significant amount of waste heat. Currently, steel companies are utilizing this waste heat only on a small-scale, experimental basis, rather than pursuing large-scale recycling. Slag is typically treated using hot stuffing technology, which converts the waste heat into steam for recycling. Traditional technologies suffer from low steam temperature, low steam pressure, slow cooling rates, low waste heat utilization efficiency, high energy consumption, and severe environmental pollution. Summary of the Invention

[0003] The purpose of the present invention is to provide a high-temperature solid steel slag cooling, conveying and processing system with high cooling efficiency, waste heat recovery, energy saving and environmental protection, comprehensive utilization of steel slag waste, and no wastewater discharge.

[0004] In order to achieve the above-mentioned purpose, the high-temperature solid steel slag cooling, conveying and processing system of the present invention comprises a steel slag conveyor, a slag bin installed on the steel slag output port of the steel slag conveyor, a steel slag cooling waste heat recovery device provided with an upper water collecting tank, a lower water collecting tank, an air inlet duct body, an air outlet duct body and installed on the steel slag conveyor, a plurality of blowers installed on the side of the steel slag cooling waste heat recovery device and connected to the air inlet duct body through an air inlet pipe, a steam drum connected to the upper water collecting tank through a water pipe, a water supply pipe installed on the steam drum, a water supply pump installed on the water supply pipe, a circulating water pipe connected to the steam drum at one end and connected to the lower water collecting tank at the other end, a circulating water pump installed on the circulating water pipe, and a steam installed on the steam drum for supplying steam to users. A steam output pipe, several air outlet pipes connected to the air outlet duct body, a dust collector installed on the air outlet pipe, and a hot air waste heat utilization pipe installed on the output end of the dust collector; the steel slag cooling waste heat recovery device includes a feeder at the bottom, an expansion joint installed at the lower end on the feeder, a steel slag silo installed at the upper end of the expansion joint, a slag inlet pipe installed on the top surface of the steel slag silo, a lower water collecting tank installed on the lower outer surface of the steel slag silo, an upper water collecting tank installed on the upper outer surface of the steel slag silo, an air inlet duct body located inside the cavity of the steel slag silo and installed in the middle of the steel slag silo, an air outlet duct body installed on the outer wall of the steel slag silo, a storage bin, a sealing bin, and a heat exchange tube bundle material bin arranged in sequence from top to bottom inside the steel slag silo.

[0005] The high-temperature solid steel slag cooling, conveying and processing system of the present invention comprises a steel slag bin comprising a heat exchange tube bundle connected to an upper water collecting tank and a lower water collecting tank at both ends, and flat steel alternately welded to the heat exchange tube bundle.

[0006] The high-temperature solid steel slag cooling, conveying and processing system of the present invention comprises an air inlet duct body comprising an air inlet heat exchange tube bundle connected to an upper water collecting box and a lower water collecting box at both ends, and an air inlet flat steel alternately welded to the heat exchange tube bundle and provided with air inlet holes.

[0007] In the high-temperature solid steel slag cooling, conveying and processing system of the present invention, the heat exchange tube bundle material bin is provided with air outlet holes on the bin body flat steel.

[0008] In the high-temperature solid steel slag cooling, conveying and processing system of the present invention, the heat exchange tube bundle material bin has a first inclined baffle on its bin body air outlet to prevent the steel slag from being blown into the inner cavity of the air outlet duct body.

[0009] The high-temperature solid steel slag cooling, conveying and processing system of the present invention has an air inlet duct body, and a second inclined baffle is provided on the air inlet hole of the silo body to prevent the steel slag from entering the inner cavity of the air inlet duct body.

[0010] The working principle of the high-temperature solid steel slag cooling, conveying and processing system of the present invention is:

[0011] (1) A high-efficiency cooling method combining wind and water is adopted. The cooling water in the heat exchange tube bundle flows inside the heat exchange tube bundle and does not directly contact the steel slag for heat exchange. The heat is exchanged through the water-cooled wall of the heat exchange tube bundle, and a steam-water mixture is generated in the heat exchange tube bundle, and the waste heat is recovered and utilized by the steam drum.

[0012] (2) The high-temperature solid steel slag fills the heat exchange tube bundle material bin. The storage bin and the sealed bin provide pressure to prevent the cooling air from rising. The heat exchange tube bundle material bin has an air inlet duct and an air outlet duct. The blower is started to transport the cooling air through the pipe to the air inlet duct, and then enter the heat exchange tube bundle material bin. The cooling air directly penetrates and cools the high-temperature steel slag. After the cooling air exchanges heat with the high-temperature steel slag, high-temperature hot air is generated. The high-temperature hot air and the high-temperature steel slag flue gas mixed with the high-temperature hot air are collected and output through the air outlet duct and enter the dust collector together. After purification by the dust collector, harmful substances in the flue gas are removed, thus being environmentally friendly. In this way, the purified high-temperature hot air can be used for waste heat utilization.

[0013] (3) The high-temperature solid steel slag is cooled by a combination of wind and water. The cooled steel slag is evenly transported to the steel slag conveyor under the action of the feeder, and then transported to the slag bin for storage. The steel slag waste can be used as a building material for comprehensive utilization, thus achieving the purpose of comprehensive utilization of steel slag waste.

[0014] (4) The steam drum has the ability to store heat, separating the steam-water mixture in the heat exchange tube bundle and connecting it to the circulating water pump through the circulating water pipeline. The steam can be supplied to steam users for use. In this way, the waste heat of hot air and steam is recovered and utilized, saving energy.

[0015] (5) A water circulation system is used. Part of the water enters the steam drum and is converted into steam for output, absorbing the waste heat of the slag to generate steam for users to use. The rest is reused in the water circulation system, so there is no wastewater discharge.

[0016] The high-temperature solid slag cooling, conveying and processing system of the present invention has excellent sealing performance and integrates high-temperature solid slag cooling, waste heat recovery, slag conveying and storage. It operates stably and reliably, uses wind and water dual cooling media, has a large processing capacity, good cooling and conveying effect, high cooling efficiency, energy saving, and no dust pollution.

[0017] In summary, the high-temperature solid steel slag cooling, conveying and processing system of the present invention has high cooling efficiency, waste heat recovery and utilization, energy saving and environmental protection, comprehensive utilization of steel slag waste, and no wastewater discharge. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments thereof.

[0019] Figure 1 It is a structural schematic diagram of the present invention;

[0020] Figure 2 yes Figure 1 Schematic diagram of the structure of the steel slag cooling waste heat recovery device;

[0021] Figure 3 yes Figure 2 AA cross-sectional view in. DETAILED DESCRIPTION

[0022] exist Figures 1 to 3In the present invention, the high-temperature solid steel slag cooling, conveying and processing system includes a steel slag conveyor 1, a slag bin 2 installed on the steel slag output port of the steel slag conveyor, a steel slag cooling waste heat recovery device 3 provided with an upper water collecting tank, a lower water collecting tank, an air inlet duct body, and an air outlet duct body and installed on the steel slag conveyor, a plurality of blowers 4 installed on the side of the steel slag cooling waste heat recovery device and connected to the air inlet duct body through an air inlet pipe, a steam drum 5 connected to the upper water collecting tank through a water pipe, a water supply pipe 6 installed on the steam drum, a water supply pump 7 installed on the water supply pipe, a circulating water pipe 8 connected to the steam drum at one end and to the lower water collecting tank at the other end, a circulating water pump 9 installed on the circulating water pipe, a steam output pipe 10 installed on the steam drum for supplying steam to users, and a plurality of outlet pipes connected to the outlet duct body. An air duct 11, a dust collector 12 installed on the air outlet duct, and a hot air waste heat utilization pipe 13 installed on the output end of the dust collector; the slag cooling waste heat recovery device 3 includes a feeder 3-1 at the bottom, an expansion joint 3-2 installed at the lower end on the feeder, a slag silo 3-3 installed at the upper end of the expansion joint, a slag inlet pipe 3-4 installed on the top surface of the slag silo, a lower water collecting tank 3-5 installed on the outer side of the lower part of the slag silo, an upper water collecting tank 3-6 installed on the outer side of the upper part of the slag silo, an air inlet duct body 3-7 located inside the cavity of the slag silo and installed in the middle of the slag silo, an air outlet duct body 3-8 installed on the outer wall of the slag silo, a storage bin 3-9, a sealing bin 3-10, and a heat exchange tube bundle material bin 3-11 arranged in sequence from top to bottom inside the slag silo.

[0023] The high-temperature solid slag cooling, conveying and processing system of the present invention comprises a slag bin 3-3 comprising a heat exchange tube bundle 3-3-1 connected to an upper water collecting tank and a lower water collecting tank at both ends, and flat steels 3-3-2 alternately welded to the heat exchange tube bundle.

[0024] The high-temperature solid steel slag cooling, conveying and processing system of the present invention, the air inlet duct body 3-7, includes an air inlet heat exchange tube bundle 3-7-1 whose two ends are respectively connected to the upper water collecting box and the lower water collecting box, and an air inlet flat steel 3-7-2 that is alternately welded to the heat exchange tube bundle and provided with an air inlet hole a.

[0025] In the high-temperature solid steel slag cooling, conveying and processing system of the present invention, the heat exchange tube bundle material bin 3-11 is provided with air outlet holes b on the flat steel of the bin body.

[0026] In the high-temperature solid steel slag cooling, conveying and processing system of the present invention, the heat exchange tube bundle material bin 3-11 has a first inclined baffle 3-11-1 on its bin body air outlet to prevent the steel slag from blowing into the inner cavity of the air outlet duct body.

[0027] In the high-temperature solid steel slag cooling, conveying and processing system of the present invention, the air inlet duct body 3-7 has an air inlet hole of the silo body provided with a second inclined baffle 3-7-3 to prevent the steel slag from entering the inner cavity of the air inlet duct body.

[0028] The high-temperature solid steel slag cooling, conveying and processing system of the present invention is only described above as a preferred embodiment of the present invention, and does not limit the present invention in any form. 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 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 high-temperature solid steel slag cooling, conveying and processing system, characterized in that: It includes a slag conveyor, a slag bin installed on the slag output port of the slag conveyor, a slag cooling waste heat recovery device equipped with an upper water collecting tank, a lower water collecting tank, an air inlet duct body, and an air outlet duct body and installed on the slag conveyor, several blowers installed on the side of the slag cooling waste heat recovery device and connected to the air inlet duct body through an air inlet pipe, a steam drum connected to the upper water collecting tank through a water pipe, a water supply pipe installed on the steam drum, a water supply pump installed on the water supply pipe, a circulating water pipe connected to the steam drum at one end and to the lower water collecting tank at the other end, a circulating water pump installed on the circulating water pipe, a steam output pipe installed on the steam drum for supplying steam to users, and connected to the air outlet duct body. Several air outlet ducts connected, a dust collector installed on the air outlet duct, and a hot air waste heat utilization pipe installed on the output end of the dust collector; the steel slag cooling waste heat recovery device includes a feeder at the bottom, an expansion joint installed at the lower end on the feeder, a steel slag silo installed at the upper end of the expansion joint, a slag inlet pipe installed on the top surface of the steel slag silo, a lower water collecting tank installed on the outer side of the lower part of the steel slag silo, an upper water collecting tank installed on the outer side of the upper part of the steel slag silo, an air inlet duct body located inside the cavity of the steel slag silo and installed in the middle of the steel slag silo, an air outlet duct body installed on the outer wall of the steel slag silo, and a storage bin, a sealing bin, and a heat exchange tube bundle material bin arranged in sequence from top to bottom inside the steel slag silo.

2. The high-temperature solid steel slag cooling, conveying and processing system according to claim 1, characterized in that: The slag bin comprises a heat exchange tube bundle whose two ends are respectively connected to an upper water collecting tank and a lower water collecting tank, and flat steels alternately welded to the heat exchange tube bundle.

3. The high-temperature solid steel slag cooling, conveying and processing system according to claim 1, characterized in that: The air inlet duct body comprises an air inlet heat exchange tube bundle whose two ends are respectively connected to the upper water collecting box and the lower water collecting box, and an air inlet flat steel which is alternately welded to the heat exchange tube bundle and provided with air inlet holes.

4. The high-temperature solid steel slag cooling, conveying and processing system according to claim 1, characterized in that: The heat exchange tube bundle material bin has air outlets on its bin body flat steel.

5. The high-temperature solid steel slag cooling, conveying and processing system according to claim 1 or 4, characterized in that: The heat exchange tube bundle material bin has a first inclined baffle on its bin body air outlet to prevent steel slag from blowing into the inner cavity of the air outlet duct body.

6. The high-temperature solid steel slag cooling, conveying and processing system according to claim 1, characterized in that: The air inlet duct body has an air inlet hole of the silo body provided with a second inclined baffle to prevent steel slag from entering the inner cavity of the air inlet duct body.

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