Comprehensive recycling solution for high-temperature solid waste

Abstract

The present invention belongs to the technical field of resource and energy recycling, and specifically relates to a comprehensive recycling solution for high-temperature solid waste. It includes a heat exchange assembly, a metal separation assembly and a waste heat circulation assembly; the heat exchange assembly is used to extract heat energy from high-temperature solid waste by heat exchange, and granulate the high-temperature solid waste and then transport it to the metal separation assembly; the metal separation assembly is used to extract magnetic metals and non-magnetic metals from granular solid waste materials through a metal separation process and form tailings; the waste heat circulation assembly is used to collect and transport the hot air extracted from the heat exchange assembly to the waste heat recovery equipment and / or tail gas treatment equipment, and track, capture and recycle the heat energy carried by the granular solid waste materials.

Description

Technical Field

[0001] The present application belongs to the technical field of resource and energy recycling and utilization, and specifically relates to a comprehensive recycling and utilization solution for high-temperature solid waste. Background Art

[0002] High-temperature solid wastes from steel and various metal smelting enterprises, such as steel slag, contain a large amount of heat energy (temperature up to 500-600 degrees Celsius) and metal substances. Comprehensive recycling of the heat energy and metal substances contained in high-temperature solid waste can reduce energy waste, avoid pollution, and promote environmental protection, which has very obvious social, economic and environmental significance. It is precisely because of this that the science and technology authorities of various countries have made the high-efficiency comprehensive recycling and utilization technology of high-temperature solid waste a key high-tech to promote.

[0003] To achieve high-efficiency comprehensive recycling of high-temperature solid waste, the following technical problems must be solved:

[0004] 1. Due to the huge amount of solid waste and the low metal content, it is necessary to develop a continuous production line recycling process and corresponding special equipment;

[0005] 2. Since solid waste contains both magnetic metals and non-magnetic metals, a metal separation solution must be developed to achieve the classification and recycling of different metals to promote the best use of materials;

[0006] 3. On the high-temperature solid waste comprehensive recovery line, after the hot extraction operation is completed, some heat energy is still carried by solid waste materials or hot air into the metal separation operation and exhaust gas treatment operation. The heat energy entering the metal separation operation will affect the recovery rate of the metal separation operation, and the heat energy entering the exhaust gas treatment operation will cause the exhaust gas to fail to meet the emission standards, and will also cause damage to the exhaust gas treatment equipment.

[0007] 4. The consistency of the occurrence state of metals in solid waste materials is relatively poor, and the comprehensive recovery rate of the metal separation process does not meet the requirements. Summary of the invention

[0008] In view of this, the present invention provides a comprehensive recycling solution for high-temperature solid waste to solve the technical problems existing in the prior art.

[0009] The solution provided by the present invention for solving the technical problem is:

[0010] A comprehensive recycling solution for high-temperature solid waste, comprising a heat exchange assembly, a metal separation assembly and a waste heat circulation assembly; the heat exchange assembly is used to extract heat energy from the high-temperature solid waste by heat exchange, and granulate the high-temperature solid waste and then convey it to the metal separation assembly; the metal separation assembly is used to extract magnetic metals and non-magnetic metals from granular solid waste materials by a metal separation process and form tailings; the waste heat circulation assembly is used to collect and convey the hot air extracted from the high-temperature solid waste heat energy in the heat exchange assembly to waste heat recovery equipment and / or tail gas treatment equipment, and track, capture and recycle the heat energy carried by the granular solid waste materials.

[0011] As a preferred embodiment of the heat exchange assembly, the heat exchange assembly includes a granulation device and a heat extraction device; the granulation device includes a buffer tank and a granulation fan, the buffer tank is used to store and pour high-temperature solid waste to form a high-temperature solid waste molten flow, and the granulation fan is used to provide wind force to the high-temperature solid waste molten flow to promote the high-temperature solid waste molten flow to fully exchange heat with the air and crystallize into solid waste particles; the heat extraction equipment includes a heat exchanger and a heat exchange fan unit, the heat exchanger includes a plurality of rows of heat exchange devices and a sealed shell that provides a closed space for the heat exchange device, the sealed shell is provided with a feed port and a drop port, the heat exchange device includes a heat exchange bed, a bed support structure and a bed drive device, the heat exchange bed can be slidably arranged on the bed support structure and can make reciprocating linear motion on the bed support structure under the action of the bed drive device, and the heat exchange bed is provided with a plurality of A ventilation structure that allows wind to pass through, at least one hot air duct is arranged on the sealed shell; the heat exchange fan unit includes a plurality of heat exchange fans and fan access ducts used in conjunction with the heat exchange fans, the fan access ducts are connected to the heat exchange fans and the bottom of the heat exchange bed and form a sealed connection with the bottom of the heat exchange bed; high-temperature solid waste is poured from the buffer tank into the sealed shell to form a high-temperature solid waste molten flow, the high-temperature solid waste molten flow can undergo sufficient heat exchange with the air blown in by the granulation fan, and finally crystallize into solid waste particles and deposit on the heat exchange bed; the solid waste particles undergo sufficient heat exchange on the heat exchange bed with the normal temperature air blown in by the heat exchange fan, the high-temperature air that has extracted energy is discharged from the sealed shell through the hot air duct, and the solid waste particles after completing the heat exchange are discharged from the sealed shell through the blanking port under the action of the bed driving device.

[0012] As a preferred embodiment of the heat exchange assembly, the granulation equipment also includes a granulation air duct, which is arranged on the sealed shell and can transport the wind from the granulation fan to the high-temperature solid waste molten flow.

[0013] As a preferred embodiment of the heat exchange assembly, the heat exchange bed is divided into a feeding section, a heat exchange section and a discharge section; the heat exchange fan unit is equipped with heat exchange fans for providing wind power to the feeding section and the heat exchange section respectively.

[0014] As a preferred metal separation assembly, the metal separation assembly includes a magnetic metal separation process and a non-magnetic metal separation process; the magnetic metal separation process includes a magnetic material extraction device, the magnetic material extraction device includes a solid waste conveying mechanism, the solid waste conveying mechanism includes a driving roller, a redirecting roller, a conveyor belt arranged on the driving roller and the redirecting roller, and a driving motor for driving the driving roller; an upper metal grabbing mechanism and a lower metal grabbing mechanism are arranged on the conveyor belt, the upper metal grabbing mechanism is used to recover the metal material on the upper layer of the solid waste; the lower metal grabbing mechanism is used to recover the metal material on the lower layer of the solid waste The non-magnetic metal separation process includes a sediment-type metal separator, which includes a chute, a slag bucket and a fan. The chute has a certain inclination, which is used to form a fluidized space for solid waste to achieve the sedimentation and separation of metal and non-metallic substances in the solid waste. The slag bucket is used to store metal substances separated from the solid waste. The fan is used to provide fluidized wind force for the solid waste to promote the solid waste to form a fluidized state on the chute. The solid waste materials first undergo a magnetic metal separation process to recover magnetic metal substances, and then undergo a non-magnetic metal separation process to recover non-magnetic metal substances, which can ensure an ideal metal recovery rate.

[0015] As a preferred metal separation assembly, the upper metal grabbing mechanism is a cart-type metal separator, which includes: a cart chassis; a first electromagnetic roller and a second electromagnetic roller, which are respectively hinged at both ends of the cart chassis, and are used to recover magnetic substances in solid waste; a synchronous belt, which is arranged on the first electromagnetic roller and the second electromagnetic roller, and is used to realize the synchronous movement of the first electromagnetic roller and the second electromagnetic roller; a driving mechanism, which is arranged on the cart chassis and is used to drive the first electromagnetic roller or the second electromagnetic roller; a suspension mechanism, which is arranged on the cart chassis and is used to suspend the cart chassis; an electronic control module, which is used to complete the system function of the cart-type metal separator, and the control ends of the first electromagnetic roller and the second electromagnetic roller are electrically connected to the electronic control module; the cart-type metal separator is suspended on the solid waste that needs to be comprehensively recycled through the suspension mechanism, and the first electromagnetic roller and the second electromagnetic roller can continuously recover the magnetic substances in the solid waste in a cross-operation mode under the drive of the driving mechanism.

[0016] As a preferred metal separation assembly, the chute includes a chute shell and a fluidized bed, the chute shell has a closed structure, the fluidized bed is provided with a plurality of air holes, and the fluidized bed is arranged in the chute shell; the hopper includes a hopper shell, the hopper shell is provided with a slag discharge port and a plurality of air blast ports; the hopper shell is sealingly connected to the chute shell, and the fluidized bed is inclined above the hopper shell.

[0017] As a preferred embodiment of the waste heat circulation assembly, the waste heat circulation assembly includes a waste heat recovery combined air duct, a cooling device and a dust removal device; the waste heat recovery combined air duct includes a front hot air duct, a main waste heat air duct and a plurality of auxiliary waste heat air ducts; one end of the front hot air duct is connected to the heat exchange section of the high-temperature solid waste comprehensive recycling and utilization assembly line, and the other end is used to connect the waste heat recovery equipment; one end of the main waste heat air duct is connected to the heat exchange section of the high-temperature solid waste comprehensive recycling and utilization assembly line and is located at the rear section of the front hot air duct, and the other end is connected to the cooling device Air inlet; one end of the auxiliary waste hot air duct is connected to the material conveying section of the high-temperature solid waste comprehensive recycling and utilization production line, and the other end is connected to the main waste hot air duct; the air outlet of the cooling equipment is connected to the air inlet of the dust removal equipment; when the high-speed hot air is transmitted along the main waste hot air duct, it can drive the low-speed hot air to be transmitted along the auxiliary waste hot air duct to the main waste hot air duct; the hot air captured by the main waste hot air duct and the auxiliary waste hot air duct is cooled and dust-removed by the cooling equipment and the dust removal equipment in turn, and then discharged from the dust removal equipment through the air outlet of the dust removal equipment.

[0018] As a preferred embodiment of the waste heat circulation assembly, a waste heat recovery hood extending along the material conveying section is provided between the auxiliary waste heat air duct and the material conveying section of the high-temperature solid waste comprehensive recycling and utilization line.

[0019] As a preferred waste heat circulation assembly, the diameter ratio of the main waste heat air duct / auxiliary waste heat air duct is between 5-12, and the fluid flow direction of the connecting part between the auxiliary waste heat air duct and the main waste heat air duct forms an angle of no more than 50° with the fluid flow direction of the main waste heat air duct, preferably an angle between 42°-45°.

[0020] Beneficial technical effects:

[0021] 1. The comprehensive recycling and utilization solution for high-temperature solid waste provided in the present application can extract the heat energy in the high-temperature solid waste into the gas medium through the heat replacement assembly, and at the same time process the high-temperature solid waste into solid waste particles with uniform particle size, thereby solving the technical problem 4 raised in the background technology; the magnetic metal and non-magnetic metal in the granular solid waste particles can be separated into separate products and form tailings through the metal separation assembly, thereby solving the technical problems 1 and 2 raised in the background technology; the hot air extracted from the solid waste heat energy can be transported to the waste heat recovery and utilization equipment and / or the exhaust gas treatment equipment through the waste heat circulation assembly, and the heat energy carried by the granular solid waste materials can be tracked, captured and recycled, thereby solving the technical problem 3 raised in the background technology.

[0022] 2. The heat exchange assembly for comprehensive recycling and utilization of high-temperature solid waste provided in the present application adopts a granulation equipment to granulate the high-temperature solid waste and combines it with a thermal extraction device to perform efficient heat exchange extraction on the solid waste particles. It can effectively recover the thermal energy of the solid waste while providing uniformly sized incoming materials for subsequent comprehensive metal recycling operations. It has technical advantages such as high energy recovery efficiency, good environmental protection effects, and helps to improve the comprehensive metal recycling rate.

[0023] 3. The waste heat recovery combined air duct adopts the front hot air duct to recover most of the heat energy in the high-temperature solid waste in the heat exchange section, and adopts the main waste heat air duct to capture part of the low-energy hot air in the heat exchange section that is not recovered by the front hot air duct. The auxiliary waste heat air duct is used to capture part of the low-energy hot air carried by solid waste materials or air to the material conveying section, such as the chain conveyor. Under the premise of ensuring the high-efficiency recovery of high-temperature solid waste heat, the waste heat entering the metal separation operation and tail gas treatment operation can be concentrated to the maximum extent and transported to the cooling equipment and dust removal equipment for further cooling and dust removal treatment. It not only improves the energy recovery efficiency, but also creates good production conditions for subsequent metal separation operations. It has obvious technological progress significance and social, economic and environmental protection significance.

[0024] 4. The metal separation assembly can not only realize the continuous recycling operation of powder solid waste and / or granular solid waste in an assembly line, but also recycle the metal substances in the solid waste by category through the magnetic metal separation process and the non-magnetic metal separation process. It has technical advantages such as high metal recovery rate and good recycling effect.

[0025] 5. The magnetic material extraction device is a special equipment developed by the inventor for the comprehensive recycling of magnetic materials in solid waste. The solid waste powder material conveyor belt is provided with an upper metal grabbing mechanism and a lower metal grabbing mechanism. The upper metal grabbing mechanism is used to recover the metal materials in the upper layer of the solid waste powder material, and the lower metal grabbing mechanism is used to recover the metal materials in the lower layer of the solid waste powder material. Through the joint operation of the upper and lower metal grabbing mechanisms, the comprehensive recycling of magnetic materials in solid waste powder materials can be completed more thoroughly, thereby effectively improving the comprehensive recycling efficiency of magnetic materials in solid waste.

[0026] The technical solution and technical effects of the present application are described in detail below in conjunction with the accompanying drawings and specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 : Equipment image contact diagram of high-temperature solid waste comprehensive recycling solution;

[0028] Figure 2 : Schematic diagram of the three-dimensional structure of the heat exchange assembly;

[0029] Figure 3: Schematic diagram of the plan layout of the heat exchange assembly;

[0030] Figure 4 : Side view of the cart-type metal separator;

[0031] Figure 5 : Top view of the cart-type metal separator;

[0032] Figure 6 : Left view of the cart-type metal separator;

[0033] Figure 7 : Schematic diagram of the structure of a sediment type metal separator;

[0034] Figure 8 : Figure 7 Schematic diagram of the fluidized bed;

[0035] Fig. 9 : Schematic diagram of the three-dimensional structure of the waste heat cycle assembly.

[0036] Logo Description:

[0037] 10-magnetic metal separation process, 20-non-magnetic metal separation process;

[0038] 110-upper metal grabbing mechanism, 120-lower metal grabbing mechanism;

[0039] 1110-carriage chassis, 1120-first electromagnetic roller, 1130-second electromagnetic roller, 1140-synchronous belt, 1150-driving mechanism, 1160-suspension mechanism;

[0040] 210-chute, 220-slag bucket, 230-fan;

[0041] 2110-chute shell, 2120-fluidized bed, 2130-air hole;

[0042] 2210-slag hopper shell, 2220-slag discharge port, 2230-air blast port, 2240-gate valve;

[0043] 71-waste heat recovery combined air duct, 72-cooling equipment, 73-dust removal equipment, 74-heat exchange section, 75-material conveying section;

[0044] 711-main waste heat air duct, 712-auxiliary waste heat air duct, 714-waste heat recovery cover, 715-front hot air duct;

[0045] 8-granulation equipment, 9-thermal extraction equipment;

[0046] 81-buffer tank, 82-granulation fan, 87-granulation air duct;

[0047] 91-heat exchanger, 92-heat exchange fan unit;

[0048] 911-heat exchange device, 912-sealed housing, 913-heat collecting plate;

[0049] 9111-heat exchange bed, 9112-bed support structure, 9113-bed driving device. DETAILED DESCRIPTION

[0050] See also Figure 1 The comprehensive recycling and utilization solution for high-temperature solid waste provided in the present application includes a heat replacement assembly, a metal separation assembly and a waste heat circulation assembly; the heat replacement assembly is used to extract heat energy from the high-temperature solid waste through heat exchange, and granulate the high-temperature solid waste and transport it to the metal separation assembly; the metal separation assembly is used to extract magnetic metals and non-magnetic metals from granular solid waste materials through a metal separation process and form tailings; the waste heat circulation assembly is used to collect and transport the hot air extracted from the high-temperature solid waste heat energy in the heat replacement assembly to the waste heat recovery and utilization equipment and / or the exhaust gas treatment equipment, and track, capture and recycle the heat energy carried by the granular solid waste materials. Figure 1 The part in the irregular arc frame is the waste heat circulation assembly, the right side of the waste heat circulation assembly is the heat replacement assembly, and the left side of the waste heat circulation assembly is the metal separation assembly.

[0051] See also Figure 1-Figure 3The heat exchange assembly includes a granulation device 8 and a heat extraction device 9; the granulation device 8 includes a buffer tank 81, a granulation fan 82 and a granulation air duct 87, the buffer tank 81 is used to store and pour high-temperature solid waste to form a high-temperature solid waste molten flow, the granulation fan 82 is used to provide wind power to the high-temperature solid waste molten flow to promote the high-temperature solid waste molten flow to fully exchange heat with the air and crystallize into solid waste particles, the granulation air duct 87 is arranged on the sealed shell 912, and can transport the wind power from the granulation fan 82 to the high-temperature solid waste molten flow; the heat extraction device 9 includes a heat exchanger 91 and a heat exchange fan unit 92, the heat exchanger 91 includes a plurality of columns of heat exchange devices 911 and a sealed shell 912 providing a closed space for the heat exchange device 911, and the sealed shell 912 is provided with a feed port and a drop port The heat exchange device 911 includes a heat exchange bed 9111, a bed support structure 9112 and a bed drive device 9113. The heat exchange bed 9111 can be slidably arranged on the bed support structure 9112 and can make reciprocating linear motion on the bed support structure 9112 under the action of the bed drive device 9113. The heat exchange bed 9111 is provided with a plurality of ventilation structures that allow wind to pass through. The ventilation structures can be hole-shaped, slit-shaped or other shapes. The sealed shell 912 is provided with at least one hot air duct. The heat exchange air unit 92 includes a plurality of heat exchange fans and a fan access pipeline used in conjunction with the heat exchange fans. The fan access pipeline is connected to the heat exchange fan and the bottom of the heat exchange bed 9111 and forms a sealed connection with the bottom of the heat exchange bed 9111. The heat exchange bed 9111 is divided into a feeding section, a heat exchange section 74 and a discharge section. The heat exchange air unit 92 is provided with a heat exchange fan for providing wind to the feeding section and the heat exchange section respectively.

[0052] in:

[0053] The distance between the air inlet of the granulation air duct 87 and the center line of the buffer tank 81 is between 2300 mm and 2450 mm.

[0054] The hot air duct includes a front section hot air duct 93 and a rear section hot air duct 94, both of which are installed on the sealed shell 912, the front section hot air duct 93 is arranged in the middle section of the heat exchange bed 9111, and the rear section hot air duct 94 is arranged in the rear section of the heat exchange bed 9111.

[0055] The heat exchange bed 9111 is a grate cooling bed. The heat exchange bed 9111 is slidably arranged on the bed support frame 9112 through a plurality of roller groups. The bed driving device 9113 is a hydraulic cylinder. In order to prevent high-temperature air carrying a large amount of heat energy from entering the rear section of the heat exchange bed 9111, a heat collecting plate 913 is further arranged between the front section hot air duct 93 and the rear section hot air duct 94. The angle formed between the heat collecting plate 913 and the heat exchange bed 9111 is not less than 90°.

[0056] The high-temperature solid waste is poured from the buffer tank 81 into the sealed shell 912 to form a high-temperature solid waste molten flow. The high-temperature solid waste molten flow can fully exchange heat with the air blown in by the granulation fan 82, and finally crystallize into solid waste particles and deposit on the heat exchange bed 9111; the solid waste particles fully exchange heat with the normal temperature air blown in by the heat exchange fan on the heat exchange bed 9111, and the high-temperature air with energy extracted is discharged from the sealed shell 912 through the hot air duct. After completing the heat exchange, the solid waste particles are discharged from the sealed shell 912 through the blanking port under the action of the bed driving device 9113.

[0057] The high-temperature solid waste is poured from the buffer tank 81 into the sealed shell 912 to form a high-temperature solid waste molten flow. The high-temperature solid waste molten flow can fully exchange heat with the air blown in by the granulation fan 82, and finally crystallize into solid waste particles and deposit on the heat exchange bed 9111. The solid waste particles fully exchange heat with the normal temperature air blown in by the heat exchange fan on the heat exchange bed 9111. The high-temperature air with energy extracted is discharged from the sealed shell 912 through the front hot air duct 93 and the rear hot air duct 94, such as being transported to the waste heat power generation equipment or cooling and dust removal equipment. After the heat exchange is completed, the solid waste particles are discharged from the sealed shell 912 through the blanking port under the action of the bed driving device 9113 and enter the metal separation assembly. The blanking mechanism is: the bed driving device 9113 drives the heat exchange bed 9111 to make a linear reciprocating motion on the bed support structure 9112, and the granular solid waste material enters the metal separation assembly through the blanking port under the action of inertia.

[0058] See also Figure 1 as well as Figure 4-Figure 8 The metal separation assembly includes a magnetic metal separation process 10 and a non-magnetic metal separation process 20; the magnetic metal separation process 10 includes a magnetic material extraction device, the magnetic material extraction device includes a solid waste conveying mechanism, the solid waste conveying mechanism includes a driving roller, a redirecting roller, a conveyor belt arranged on the driving roller and the redirecting roller, and a driving motor for driving the driving roller; an upper metal grabbing mechanism 110 and a lower metal grabbing mechanism 120 are arranged on the conveyor belt, the upper metal grabbing mechanism 110 is used to recover the metal material on the upper layer of the solid waste; the lower metal grabbing mechanism 120 is used to recover the metal material on the upper layer of the solid waste; the lower metal grabbing mechanism 120 is used to recover the metal material on the upper layer of the solid waste; the lower metal grabbing mechanism 120 is used to recover the metal material on the upper layer of the solid waste. The grabbing mechanism 120 is used to recover the metal material in the lower layer of the solid waste; the non-magnetic metal separation process 20 includes a sediment-type metal separator, which includes a chute 210, a slag bucket 220 and a fan 230; the chute 210 has a certain inclination, which is used to form a fluidized space for the solid waste to achieve the sedimentation and separation of metal materials and non-metallic materials in the solid waste; the slag bucket 220 is used to store the metal materials separated from the solid waste; the fan 230 is used to provide fluidized wind force for the solid waste to promote the solid waste to form a fluidized state on the chute 210.

[0059] Solid waste materials are first subjected to the magnetic metal separation process 10 to recover magnetic metal materials, and then subjected to the non-magnetic metal separation process 20 to recover non-magnetic metal materials, which can ensure an ideal metal recovery rate. After the granular solid waste materials are recycled and processed by the metal separation assembly, three products are formed: magnetic metals are stored in the magnetic metal ore bin 201, non-magnetic metals are stored in the non-magnetic metal ore bin 304, and tailings are stored in the machine-made sand bin 504.

[0060] The upper metal grabbing mechanism 110 is a cart-type metal separator, which includes a cart chassis 1110 , a first electromagnetic roller 1120 , a second electromagnetic roller 1130 , a synchronous belt 1140 , a driving mechanism 1150 and a suspension mechanism 1160 .

[0061] The trolley chassis 1110 is used to carry other components or parts. The first electromagnetic roller 1120 and the second electromagnetic roller 1130 are respectively hinged at the two ends of the trolley chassis 1110, and are used to recover magnetic substances in solid waste. The synchronous belt 1140 is arranged on the first electromagnetic roller 1120 and the second electromagnetic roller 1130, and is used to realize the synchronous movement of the first electromagnetic roller 1120 and the second electromagnetic roller 1130. The synchronous belt is a belt or a track. The driving mechanism 1150 is arranged on the trolley chassis 1110, including a driving motor and a speed change device used in conjunction with the driving motor, and is used to drive the first electromagnetic roller 1120 or the second electromagnetic roller 1130; the side of the trolley chassis 1110 is provided with a flange structure, and the driving mechanism 1150 is provided with a flange matching structure, and the driving mechanism 1150 is fastened to the trolley chassis 1110 through the matching between the flange structure and the flange matching structure. The suspension mechanism 1160 is arranged on the trolley chassis 1110 and is used to suspend the trolley chassis 1110; the suspension mechanism 1160 includes an upper suspension rope, a hanger and a lower suspension rope; one end of the upper suspension rope is hinged on the hanger, and the other end is used to connect the suspension facility; one end of the lower suspension rope is hinged on the hanger, and the other end is hinged on the trolley chassis 1110. There are four suspension mechanisms 1160, and the four suspension structures 1160 are evenly and symmetrically arranged on the trolley chassis 1110 so that the trolley chassis 1110 is evenly stressed. The electric control module is used to complete the system function of the trolley type metal separator, and the control ends of the first electromagnetic roller 1120 and the second electromagnetic roller 1130 are electrically connected to the electric control module.

[0062] The lower metal grabbing mechanism 120 includes a permanent magnetic roller, a residual material hopper and a fine material hopper. The residual material hopper is used to contain residual materials, and the fine material hopper is used to contain magnetic substances.

[0063] When the material passes through the solid waste material conveyor belt, the metal in the upper layer is sucked onto the electromagnetic roller of the upper metal grabbing mechanism 110 under the action of the upper metal grabbing mechanism 110, and the metal in the lower layer is sucked onto the permanent magnetic roller of the lower metal grabbing mechanism 120 under the action of the lower metal grabbing mechanism 120. Even if the powder or granular material on the conveyor belt is thick, the magnetic metal can be efficiently separated, thereby effectively improving the comprehensive recycling efficiency of magnetic materials in solid waste and solving the corresponding technical problems existing in the prior art.

[0064] Principle description of magnetic material extraction device:

[0065] The cart-type metal separator is suspended on the infrastructure by the suspension mechanism 1160, so that the first electromagnetic roller 1120 and the second electromagnetic roller 1130 are in contact with the solid waste to be recycled on the solid waste conveyor belt. Due to the friction between the magnetic roller and the solid waste and / or between the transmission belt, when the driving mechanism 1150 drives the magnetic roller to rotate, the first electromagnetic roller 1120 and the second electromagnetic roller 1130 move in the X+ direction of the conveyor belt at the same time. When one of the magnetic rollers, such as the first electromagnetic roller 1120, leaves the conveyor belt, the electric control module disconnects the power supply circuit of the first electromagnetic roller 1120. At this time, the first electromagnetic roller 1120 loses its magnetism and starts to unload, and the second electromagnetic roller 11 30 is still grabbing the magnetic material in the solid waste; when the first electromagnetic roller 1120 completes unloading, the electric control module makes the driving mechanism 1150 drive in the reverse direction, at this time the first electromagnetic roller 1120 and the second electromagnetic roller 1130 move in the X-direction, that is, in the opposite direction to the X+ direction, when the second electromagnetic roller 1130 leaves the conveyor belt, the electric control module disconnects the power supply circuit of the second electromagnetic roller 1130, at this time the second electromagnetic roller 1130 loses its magnetism and starts unloading, and the first electromagnetic roller 1120 is still grabbing the magnetic material in the solid waste; in this way, the continuous cross-operation of the cart-type metal separator is realized, or the magnetic metal in the solid waste is continuously recovered in the cross-operation mode. Through the continuous cross-operation of the upper metal grabbing mechanism 110, the efficient separation and recovery of the magnetic material in the upper layer of the solid waste powder material can be completed. After the solid waste powder or granular material on the conveyor belt is recycled by the upper metal grabbing mechanism 110, it will be recycled again by the lower metal grabbing mechanism 120 after leaving the conveyor belt. At this time, the magnetic metal in the lower layer of the solid waste powder material will be absorbed to the surface of the magnetic roller under the action of the magnetic roller, and then collected into the fine material hopper of the lower metal grabbing mechanism 120.

[0066] The main equipment of the non-magnetic metal separation process 20 is a sediment type metal separator, which includes a chute 210, a slag bucket 220 and a fan 230. The chute 210 has an inclination angle between 15° and 23°, and is used to form a fluidized space for solid waste to achieve sedimentation and separation of metal substances and non-metallic substances in the solid waste; the slag bucket 220 is used to store the metal substances separated from the solid waste; and the fan 230 is used to provide fluidized wind force for the solid waste to promote the solid waste to form a fluidized state on the chute 210.

[0067] The chute 210 includes a chute shell 2110 and a fluidized bed 2120 . The chute shell 2110 has a closed structure. The fluidized bed 2120 is provided with a plurality of air holes 2130 . The fluidized bed 2120 is disposed in the chute shell 2110 . The chute shell 2110 is also provided with a feed port 2140 .

[0068] The hopper 220 includes a hopper shell 2210, on which a slag discharge port 2220 and a plurality of blast ports 2230 are provided; the hopper shell 2210 is sealed and fastened to the chute shell 2110, and the fluidized bed 2120 is obliquely arranged above the hopper shell 2210. The plurality of blast ports 2230 are evenly arranged around the hopper shell 2210, and a gate valve 2240 is also provided at the slag discharge port 2220 of the hopper 220.

[0069] The solid waste material processed by the magnetic metal separation process 10 is fed into the chute 210 from the feed port 2140, and the fan 230 is started at the same time or in advance, and the solid waste material enters the fluidized state on the fluidized bed 2120 and undergoes sedimentation and separation. The metal materials with higher density enter the slag hopper 220, and the non-metallic materials slide out of the fluidized bed 2120 and enter the machine-made sand storage 504.

[0070] In another preferred embodiment of the present application, the diameter of the air hole 130 gradually decreases from the high end to the low end of the fluidized bed 2120, so as to reasonably distribute the wind force on the fluidized bed 2120 according to the gradient difference of the metal content in the material to be sorted.

[0071] In another preferred embodiment of the present application, the blowing direction of the tuyere 2230 of the bucket 220 is tangent to the extension direction of the bucket shell 2210, so as to separate metal minerals by providing a rotating fluid and using centrifugal force and gravity at the same time.

[0072] See also Figure 1 and Fig. 9, the waste heat circulation assembly includes a waste heat recovery combined air duct 71, a cooling device 72 and a dust removal device 73; the waste heat recovery combined air duct 71 includes a front hot air duct 715, a main waste heat air duct 711 and a plurality of auxiliary waste heat air ducts 712. One end of the front hot air duct 715 is connected to the front section or middle section of the heat exchange section 74 on the high-temperature solid waste comprehensive recycling and utilization pipeline, and the other end is used to connect the waste heat recovery equipment. One end of the main waste heat air duct 711 is connected to the rear section or tail section of the heat exchange section 74 of the high-temperature solid waste comprehensive recycling and utilization pipeline, and the other end is connected to the air inlet of the cooling device 72. One end of the auxiliary waste heat air duct 712 is connected to the material conveying section 75 of the high-temperature solid waste comprehensive recycling and utilization pipeline, and a waste heat recovery cover 714 extending along the material conveying section 75 is provided between the auxiliary waste heat air duct 712 and the material conveying section 75, and the other end is connected to the main waste heat air duct 711. The air outlet of the cooling device 72 is connected to the air inlet of the dust removal device 73. The front hot air duct 715, the main waste heat air duct 711 and the auxiliary waste heat air duct 712 are fixed on the infrastructure through the air duct fixing structure. Among them: the diameter ratio of the main waste heat air duct 711 / auxiliary waste heat air duct 712 is 6.5; the angle β formed between the fluid flow direction of the connecting part between the auxiliary waste heat air duct 712 and the main waste heat air duct 711 and the fluid flow direction of the main waste heat air duct 711 is 42°-45°; the cooling device 72 is a condenser or a condensation tower, and the dust removal device 73 is a bag dust collector.

[0073] Most of the hot air that has extracted energy in the heat exchange section (more than 85%) is transported to waste heat recovery equipment such as power generation equipment through the front hot air duct 7150, a small part is transported to the cooling equipment 720 through the main waste hot air duct 7110, and part of the heat energy carried into the metal separation operation by solid waste materials or hot air is captured by the auxiliary waste hot air duct 7120 and transported to the main waste hot air duct 7110.

[0074] When the high-speed hot air from the high-temperature section of the high-temperature solid waste comprehensive recycling line is transmitted along the main waste hot air duct 7110, it can drive the low-speed hot air from the low-temperature section of the high-temperature solid waste comprehensive recycling line to be transmitted along the auxiliary waste hot air duct 7120 to the main waste hot air duct 7110. The hot air captured by the main waste hot air duct 7110 and the auxiliary waste hot air duct 7120 is cooled and dusted by the cooling device 720 and the dust removal device 730 in turn, and then discharged from the dust removal device 730 through the air outlet of the dust removal device 730.

[0075] In summary, the comprehensive recycling and utilization solution for high-temperature solid waste provided by the present application can extract the heat energy in the high-temperature solid waste into the gas medium through the heat exchange assembly, and at the same time process the high-temperature solid waste into solid waste particles with uniform particle size (particle size between 2-5mm), providing uniform particle size input materials for subsequent metal separation operations; the metal separation assembly can separate the magnetic metals and non-magnetic metals in the granular solid waste particles into separate products and form tailings, which can not only realize the assembly line continuous recycling operation of powdered solid waste and / or granular solid waste, but also classify and recover the metal substances in the solid waste through the magnetic metal separation process and the non-magnetic metal separation process; the waste heat circulation assembly can maximize the concentration of waste heat entering the metal separation operation and the exhaust gas treatment operation and transport it to the cooling equipment and dust removal equipment for further cooling and dust removal treatment while ensuring the high-temperature solid waste heat energy is efficiently recovered; it has obvious technological progress significance and social, economic and environmental protection significance.

[0076] It should be particularly noted that the use of ordinal numbers such as first and second and the marking method of function + name to name related components or structures in this application is only to distinguish similar components or structures with the same structure or function, and does not imply that the related components or structures have functional or structural priorities or differences in importance, and should not be understood as a limitation on this application.

[0077] The technical scheme and technical effects of the present invention are described in detail above in combination with the drawings and specific embodiments of the specification. It should be noted that the specific implementation methods disclosed in the specification are only the preferred embodiments of the present invention, and technical personnel in the field can also develop other embodiments on this basis; any simple deformation and equivalent substitution that does not deviate from the innovative concept of the present invention are covered here and fall within the scope of protection of this patent.

Claims

1. A high-temperature solid waste comprehensive recycling and treatment device, characterized in that: The high-temperature solid waste comprehensive recycling and treatment device includes a heat replacement assembly, a metal separation assembly and a waste heat circulation assembly; The heat exchange assembly is used to extract heat energy from the high-temperature solid waste through heat exchange, and to granulate the high-temperature solid waste and then transport it to the metal separation assembly; The metal separation assembly is used to extract magnetic metals and non-magnetic metals from granular solid waste materials through a metal separation process and form tailings; The waste heat circulation assembly is used to collect and transport the hot air extracted from the heat exchange assembly to the waste heat recovery equipment and / or tail gas treatment equipment, and to track, capture and recover the heat energy carried by the granular solid waste materials; The metal separation assembly comprises a magnetic metal separation process (10) and a non-magnetic metal separation process (20); The magnetic metal separation process (10) comprises a magnetic material extraction device, the magnetic material extraction device comprises a solid waste conveying mechanism, the solid waste conveying mechanism comprises a driving roller, a redirecting roller, a conveyor belt arranged on the driving roller and the redirecting roller, and a driving motor for driving the driving roller; an upper metal grabbing mechanism (110) and a lower metal grabbing mechanism (120) are arranged on the conveyor belt, the upper metal grabbing mechanism (110) is used to recover metal materials on the upper layer of the solid waste; the lower metal grabbing mechanism (120) is used to recover metal materials on the lower layer of the solid waste; The non-magnetic metal separation process (20) comprises a sediment-type metal separator, which comprises a chute (210), a slag bucket (220) and a fan (230); the chute (210) has a certain inclination, and is used to form a fluidized space for solid waste to achieve sedimentation and separation of metal substances and non-metal substances in the solid waste; the slag bucket (220) is used to store the metal substances separated from the solid waste; the fan (230) is used to provide wind force for fluidization of the solid waste to promote the solid waste to form a fluidized state on the chute (210); The solid waste material is first subjected to a magnetic metal separation step (10) to recover magnetic metal substances, and then subjected to the non-magnetic metal separation step (20) to recover non-magnetic metal substances; The upper metal grabbing mechanism (110) is a cart-type metal separator, and the cart-type metal separator comprises: Carriage chassis (1110); A first electromagnetic roller (1120) and a second electromagnetic roller (1130) are respectively hinged at two ends of the cart chassis (1110) and are used to recover magnetic substances in solid waste; A synchronous belt (1140), arranged on the first electromagnetic roller (1120) and the second electromagnetic roller (1130), and used to achieve synchronous movement of the first electromagnetic roller (1120) and the second electromagnetic roller (1130); A driving mechanism (1150), arranged on the vehicle chassis (1110), and used for driving the first electromagnetic roller (1120) or the second electromagnetic roller (1130); A suspension mechanism (1160) is disposed on the vehicle chassis (1110) and is used to suspend the vehicle chassis (1110); An electric control module, used to complete the system function of the cart-type metal separator, wherein the control ends of the first electromagnetic roller (1120) and the second electromagnetic roller (1130) are electrically connected to the electric control module; The cart-type metal separator is suspended on the solid waste that needs to be comprehensively recycled through the suspension mechanism (1160), and the first electromagnetic roller (1120) and the second electromagnetic roller (1130) can be driven by the drive mechanism (1150) to continuously recover magnetic substances in the solid waste in a cross-operation mode; The lower metal grabbing mechanism (120) comprises a permanent magnetic roller, a residual material hopper and a fine material hopper, wherein the residual material hopper is used to contain residual material, and the fine material hopper is used to contain magnetic material; The chute (210) comprises a chute shell (2110) and a fluidized bed (2120); the chute shell (2110) has a closed structure; the fluidized bed (2120) is provided with a plurality of air holes (2130); and the fluidized bed (2120) is arranged in the chute shell (2110); The hopper (220) comprises a hopper shell (2210), and the hopper shell (2210) is provided with a slag discharge port (2220) and a plurality of blast ports (2230); the hopper shell (2210) is sealingly connected to the chute shell (2110), and the fluidized bed (2120) is obliquely arranged above the hopper shell (2210).

2. The high-temperature solid waste comprehensive recycling and treatment device according to claim 1 is characterized in that: The heat exchange assembly comprises a granulation device (8) and a heat extraction device (9); the granulation device (8) comprises a buffer tank (81) and a granulation fan (82); the buffer tank (81) is used to store and discharge high-temperature solid waste to form a high-temperature solid waste molten flow; the granulation fan (82) is used to provide wind force to the high-temperature solid waste molten flow to promote the high-temperature solid waste molten flow to fully exchange heat with air and crystallize into solid waste particles; the heat extraction device (9) comprises a heat exchanger (91) and a heat exchange fan unit (92); the heat exchanger (91) comprises a plurality of rows of heat exchange devices (911) and a sealed shell (912) providing a closed space for the heat exchange device (911); the sealed shell (912) is provided with a feed port and a discharge port; the heat exchange device (911) comprises a heat exchange bed (9111), a bed support structure (9112) and a bed drive device (9113), the heat exchange bed (9111) can be slidably arranged on the bed support structure (9112) and can perform reciprocating linear motion on the bed support structure (9112) under the action of the bed drive device (9113), the heat exchange bed (9111) is provided with a plurality of air-permeable structures that allow wind to pass through, and the sealed shell (912) is provided with at least one hot air duct; the heat exchange fan unit (92) includes a plurality of heat exchange fans and a fan access duct used in conjunction with the heat exchange fans, the fan access duct is connected to the heat exchange fan and the bottom of the heat exchange bed (9111) and forms a sealed connection with the bottom of the heat exchange bed (9111); The high-temperature solid waste is poured from the buffer tank (81) into the sealed shell (912) to form a high-temperature solid waste molten flow. The high-temperature solid waste molten flow can fully exchange heat with the air blown in by the granulation fan (82) and finally crystallize into solid waste particles and deposit on the heat exchange bed (9111); the solid waste particles fully exchange heat with the normal-temperature air blown in by the heat exchange fan on the heat exchange bed (9111), and the high-temperature air with energy extracted is discharged from the sealed shell (912) through the hot air duct. After completing the heat exchange, the solid waste particles are discharged from the sealed shell (912) through the discharge port under the action of the bed driving device (9113).

3. The high-temperature solid waste comprehensive recycling and treatment device according to claim 2 is characterized in that: The granulation equipment (8) further comprises a granulation air duct (87), wherein the granulation air duct (87) is arranged on the sealed housing (912) and is capable of conveying wind power from the granulation fan (82) to the high-temperature solid waste molten flow.

4. The high-temperature solid waste comprehensive recycling and treatment device according to claim 2 is characterized in that: The heat exchange bed (9111) is divided into a feeding section, a heat exchange section and a discharge section; the heat exchange fan unit (92) is equipped with heat exchange fans for providing wind power to the feeding section and the heat exchange section respectively.

5. The high-temperature solid waste comprehensive recycling and treatment device according to claim 1 is characterized in that: The waste heat circulation assembly comprises a waste heat recovery combined air duct (71), a cooling device (72) and a dust removal device (73); the waste heat recovery combined air duct (71) comprises a front hot air duct (715), a main waste heat air duct (711) and a plurality of auxiliary waste heat air ducts (712); one end of the front hot air duct (715) is connected to a heat exchange section (74) of a high-temperature solid waste comprehensive recycling and utilization line, and the other end is used to connect to the waste heat recovery device; the main waste heat air duct (711) One end is connected to the heat exchange section (74) of the high-temperature solid waste comprehensive recycling and utilization line and is located at the rear section of the front hot air duct (715), and the other end is connected to the air inlet of the cooling device (72); one end of the auxiliary waste hot air duct (712) is connected to the material conveying section (75) of the high-temperature solid waste comprehensive recycling and utilization line, and the other end is connected to the main waste hot air duct (711); the air outlet of the cooling device (72) is connected to the air inlet of the dust removal device (73); When high-speed hot air is transmitted along the main waste heat air duct (711), it can drive low-speed hot air to be transmitted along the auxiliary waste heat air duct (712) to the main waste heat air duct (711); the hot air captured by the main waste heat air duct (711) and the auxiliary waste heat air duct (712) is cooled and dust-removed by the cooling device (72) and the dust removal device (73) in turn, and then discharged from the dust removal device (73) through the air outlet of the dust removal device (73).

6. The high-temperature solid waste comprehensive recycling and treatment device according to claim 5 is characterized in that: A waste heat recovery hood (714) extending along the material conveying section (75) is provided between the auxiliary waste heat air duct (712) and the material conveying section (75) of the high-temperature solid waste comprehensive recycling and utilization line.

7. The high-temperature solid waste comprehensive recycling and treatment device according to claim 5 is characterized in that: The diameter ratio of the main waste heat air duct (711) to the auxiliary waste heat air duct (712) is between 5 and 12, and the fluid flow direction of the connecting portion between the auxiliary waste heat air duct (712) and the main waste heat air duct (711) forms an angle of no more than 50 degrees with the fluid flow direction of the main waste heat air duct (711).

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