High-temperature cinder ladle waste heat recovery system and method

Abstract

The invention relates to the technical field of metallurgical copper slag treatment, and provides a high-temperature cinder ladle waste heat recovery system and method.The recovery system comprises a heat collecting cover, a conveying mechanism and a plurality of heat exchange modules arranged at intervals in the conveying direction of the conveying mechanism, and the heat collecting cover is provided with a conveying channel located between a slag discharging operation area and a water cooling operation area; the conveying mechanism is arranged on the conveying channel and used for conveying slag ladles in the slag discharging operation area to the water cooling operation area. The heat exchange module is arranged on the inner wall of the conveying channel and used for conducting radiation heat exchange with the cinder ladle. The slag ladles in the slag discharging operation area are conveyed to the water cooling operation area through the conveying mechanism, the multiple heat exchange modules conduct radiation heat exchange with the slag ladles in sequence, and therefore sufficient recovery of high-grade waste heat of the slag ladles is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of metallurgical copper slag treatment, and in particular to a high-temperature slag ladle waste heat recovery system and method. Background Art

[0002] With the development of the copper smelting industry and the growth of copper demand, copper slag, as a by-product of the smelting production process, has also increased year by year. According to statistics, about 2.2 tons of copper slag are produced for every ton of copper produced. In order to have a better crystal form of copper slag during the cooling process, which is conducive to the recovery of copper ore, the current copper slag treatment process mainly adopts the method of slow air cooling + water quenching of slag bag, so that the copper slag can form a better crystal form during the cooling process.

[0003] However, the temperature of copper slag when discharged from the smelting furnace is about 1200℃~1300℃, which is a high-grade waste heat resource. During the cooling process of copper slag, a large amount of high-grade waste heat of copper slag is directly discharged into the air, resulting in a large amount of waste heat waste. Therefore, the recovery of high-grade waste heat from copper slag is an important issue that needs to be solved urgently in the industry. Summary of the invention

[0004] The present invention provides a high-temperature slag bag waste heat recovery system and method, which are used to solve the defect of waste heat waste in the high-temperature copper slag cooling process in the prior art. During the transportation of the slag bag, multiple heat exchange modules perform radiation heat exchange with the slag bag in turn, thereby realizing full recovery of the high-grade waste heat of the slag bag.

[0005] The present invention provides a high-temperature slag bag waste heat recovery system, comprising: A heat collection hood having a transport passage between a slag discharge operation area and a water cooling operation area; A transport mechanism, arranged in the transport passage, and used for transporting the slag bag in the slag discharge operation area to the water cooling operation area; The recovery mechanism comprises a plurality of heat exchange modules sequentially arranged along a first direction, wherein the heat exchange modules are arranged on the inner wall of the transport channel and are used for radiant heat exchange with the slag bag, and the first direction is the transport direction of the transport mechanism.

[0006] According to a high-temperature slag ladle waste heat recovery system provided by the present invention, the transport channel comprises two side walls opposite to each other along a second direction, and a top wall located between the two side walls, the height of the top wall gradually decreases from the middle to both sides, and the second direction is perpendicular to the first direction; The heat exchange module comprises at least one heat exchange water pipe unit, wherein the heat exchange water pipe unit comprises two heat exchange water pipe components arranged opposite to each other along a second direction, and each of the heat exchange water pipe components comprises: A water dividing member, arranged at the bottom of the side wall; A water collecting member, which is arranged in the middle of the top wall; A plurality of heat exchange tubes, and the plurality of heat exchange water tubes are arranged side by side in the first direction, and each of the heat exchange water tubes is connected between the water distributing member and the water collecting member; When the heat exchange module includes a plurality of the heat exchange water tube units arranged in the first direction, the plurality of heat exchange water tube components on the same side are connected in series in sequence in the first direction.

[0007] According to a high-temperature slag ladle waste heat recovery system provided by the present invention, the heat exchange water tube component further includes a connecting pipe, one end of the connecting pipe is connected to the water distributing member or the water collecting member, and the other end of the connecting pipe corresponds to the position of the water collecting member or the water distributing member.

[0008] According to a high-temperature slag ladle waste heat recovery system provided by the present invention, the heat exchange module includes at least one heat exchange water tube unit, and each heat exchange water tube unit includes: A water distributing member; A water collecting member, and the water distributing member and the water collecting member are arranged on the side wall of the transportation channel; A plurality of heat exchange tubes, which are connected between the water distributing member and the water collecting member; when there are a plurality of the heat exchange water tube units, the water distributing members and the water collecting members of two adjacent heat exchange water tube units are connected.

[0009] According to a high-temperature slag ladle waste heat recovery system provided by the present invention, a plurality of the heat exchange water tube units are arranged in sequence in the first direction, and the water distributing member farthest from the slag discharging operation area is used as the inlet of the heat exchange module; the water collecting member closest to the slag discharging operation area is used as the outlet of the heat exchange module.

[0010] According to a high-temperature slag ladle waste heat recovery system provided by the present invention, the recovery mechanism further includes: A plurality of control valves, and the plurality of control valves are respectively connected to the plurality of heat exchange modules in one-to-one correspondence; A controller, which is electrically connected to the plurality of control valves, and the controller is used to adjust the opening degrees of the plurality of control valves.

[0011] According to a high-temperature slag ladle waste heat recovery system provided by the present invention, the recovery mechanism further includes: A plurality of fluid driving members, and the plurality of fluid driving members are respectively connected to the plurality of heat exchange modules in one-to-one correspondence; The controller is connected to the plurality of fluid driving members, and the controller is used to adjust the frequency of the fluid driving members so that the water temperature at the outlet of the heat exchange module reaches the waste heat application target temperature.

[0012] The present invention also provides a high-temperature slag ladle waste heat recovery method, which is based on the high-temperature slag ladle waste heat recovery system described in any one of the above, and the method includes: Transfer the slag ladle in the slag discharging operation area to the transportation mechanism; The transportation mechanism transports the slag ladle to the water cooling operation area and stops at a preset time duration at the corresponding position of each heat exchange module, so that the heat exchange module conducts radiative heat exchange with the slag ladle.

[0013] According to a high-temperature slag ladle waste heat recovery method provided by the present invention, the method further includes: By adjusting the number of the heat exchange water pipe units of the heat exchange module, the outlet temperature of the heat exchange module is made to reach the target temperature for waste heat application, so as to meet the temperature usage requirements.

[0014] According to a high-temperature slag ladle waste heat recovery method provided by the present invention, the method further includes: By adjusting the flow rate of the heat exchange module and / or the number of the heat exchange water pipe units of the heat exchange module, the cooling rate of the slag ladle is regulated to ensure the process requirements for slag ladle cooling.

[0015] The high-temperature slag ladle waste heat recovery system provided by the present invention constructs a heat collection cover between the slag discharging operation area and the water cooling operation area. The heat collection cover has a transportation passage located between the slag discharging operation area and the water cooling operation area, and a transportation mechanism and a plurality of heat exchange modules are arranged in the transportation passage. The transportation mechanism is used to transport the slag ladle in the slag discharging operation area to the water cooling operation area. The plurality of heat exchange modules are arranged at intervals along the transportation direction of the transportation mechanism, and the plurality of heat exchange modules conduct radiative heat exchange with the slag ladle in sequence, so as to fully recover the high-grade waste heat of the slag ladle. Description of the Drawings

[0016] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained according to these drawings without creative efforts.

[0017] Figure 1 It is a schematic diagram of the principle structure of the high-temperature slag ladle waste heat recovery system provided by the present invention.

[0018] Figure 2 It is a front view structure schematic diagram of a high-temperature slag ladle waste heat recovery system provided by the present invention.

[0019] Figure 3 It is a partial top view structure schematic diagram of a high-temperature slag ladle waste heat recovery system provided by the present invention.

[0020] Figure 4 It is one of the partial side view structure schematic diagrams of a high-temperature slag ladle waste heat recovery system provided by the present invention.

[0021] Figure 5 It is the second partial side view structural schematic diagram of a high-temperature slag ladle waste heat recovery system provided by the present invention.

[0022] Figure 6 It is the first structural schematic diagram of the cooperation between the heat exchange module and the slag ladle provided by the present invention.

[0023] Figure 7 It is the front view structural schematic diagram of another high-temperature slag ladle waste heat recovery system provided by the present invention.

[0024] Figure 8 It is the partial top view structural schematic diagram of another high-temperature slag ladle waste heat recovery system provided by the present invention.

[0025] Figure 9 It is the partial side view structural schematic diagram of another high-temperature slag ladle waste heat recovery system provided by the present invention.

[0026] Figure 10 It is the second structural schematic diagram of the cooperation between the heat exchange module and the slag ladle provided by the present invention.

[0027] Figure 11 It is the first process schematic diagram of the high-temperature slag ladle waste heat recovery method provided by the present invention.

[0028] Figure 12 It is the second process schematic diagram of the high-temperature slag ladle waste heat recovery method provided by the present invention.

[0029] Figure 13 It is the structural schematic diagram of the elbow provided by the present invention.

[0030] Reference numerals 100, heat collection cover; 110, transportation channel; 120, heat insulation layer; 200, transportation mechanism; 210, transportation track; 221, transfer trolley; 2211, transfer flat plate; 2212, wheels; 2213, fixing device; 300, heat exchange module; 31, hot water exchange pipe unit; 310, hot water exchange pipe component; 311, water distribution part; 312, water collection part; 313, heat exchange pipe; 314, connecting pipe; 320, control valve; 330, water collection-water distribution connecting pipe; 340, water supply pipe; 350, water supply-water distribution connecting pipe; 360, return water pipe; 370, water collection-return water connecting pipe; 380, pipe connection device; 301, 1# water distributor; 302, 1# water collector; 303, 2# water distributor; 304, 2# water collector; 305, 3# water distributor; 306, 3# water collector; 307, 4# water distributor; 308, 4# water collector; 400, slag discharging operation area; 500, water cooling operation area; 600, slag ladle. Detailed implementation manner

[0031] The following further describes in detail the implementation manners of the present invention in conjunction with the accompanying drawings and embodiments. The following embodiments are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0032] In the description of the embodiments of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present invention. In addition, the terms "first", "second", and "third" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0033] In the description of the embodiments of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific situations.

[0034] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "below" and "beneath" the second feature can be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0035] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the embodiments of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0036] The following will describe the high-temperature slag ladle waste heat recovery system of the present invention in conjunction with Figures 1 - 13 Describe the high-temperature slag ladle waste heat recovery system of the present invention.

[0037] An embodiment of the first aspect of the present invention provides a high-temperature slag ladle waste heat recovery system, as Figures 1 to 3 shown, the waste heat recovery system includes a heat collection hood 100, a transportation mechanism 200, and a recovery mechanism.

[0038] The heat collection hood 100 has a transportation passage 110 located between the slag discharging operation area 400 and the water cooling operation area 500; the transportation mechanism 200 is arranged in the transportation passage 110, and the transportation mechanism 200 is used to transport the slag ladle 600 in the slag discharging operation area 400 to the water cooling operation area 500; the recovery mechanism includes a plurality of heat exchange modules 300 arranged at intervals in the first direction, the heat exchange modules 300 are arranged on the inner wall of the transportation passage 110, and the heat exchange modules 300 are used for radiative heat exchange with the slag ladle 600. Wherein, the first direction is the transportation direction of the transportation mechanism 200.

[0039] It can be understood that when copper slag is discharged from the smelting furnace, the temperature is 1200°C to 1300°C (about 1280°C), which belongs to high-grade waste heat resources. Taking the specific heat capacity Cp as 1.1 kJ / kg·°C (kilojoules per kilogram per degree Celsius), the copper slag amount m is 1 t (ton), and the latent heat r of the copper slag m Taking 209 kJ / kg (kilojoules per kilogram), when the temperature of the copper slag drops from 1280°C (denoted as t1) to 800°C (denoted as t2) by air slow cooling, the heat Q released in this process is Q = Cp×m×(t1 - t2) + m×r m=737000 kJ / ton of slag, equivalent to the calorific value of 25 kg (kilograms) of standard coal (the calorific value of 1 kg of standard coal is 29307 kJ). The mass of each copper slag package (slag package) is about 35 t (tons), and the recoverable heat is 25795000 kJ, equivalent to the heat of 880 kg of standard coal. To improve the utilization rate of waste heat in the copper smelting process, the current copper slag waste heat utilization technology recovers the waste heat of copper slag by collecting the steam generated in the water quenching stage. This technology cannot recover a large amount of high-grade waste heat generated in the air cooling stage, resulting in a large amount of waste heat waste, which is not conducive to energy conservation, emission reduction, and the sustainable development of future copper plants. Based on this, the present invention arranges a high-temperature slag package waste heat recovery system between the slag discharging operation area 400 and the water cooling operation area 500, and recovers the high-grade waste heat in the slag package cooling stage through the high-temperature slag package waste heat recovery system.

[0040] Specifically, a heat collection cover 100 is constructed between the slag discharging operation area 400 and the water cooling operation area 500. The heat collection cover 100 has a transportation channel 110. The entrance of the transportation channel 110 is connected to the slag discharging operation area 400, and the exit of the transportation channel 110 is connected to the water cooling operation area 500. A transportation mechanism 200 and a plurality of heat exchange modules 300 are arranged in the transportation channel 110. The transportation mechanism 200 is used to transport the slag package 600 in the slag discharging operation area 400 to the water cooling operation area 500. The plurality of heat exchange modules 300 are arranged at intervals along the first direction. Thus, during the transportation of the slag package 600, the plurality of heat exchange modules 300 sequentially perform radiative heat exchange with the slag package 600, and can fully recover and utilize the waste heat of the slag package 600.

[0041] Exemplarily, the number of the heat exchange modules 300 is N, and N is an integer greater than or equal to 2. The plurality of heat exchange modules 300 are respectively the first heat exchange module, the second heat exchange module,..., the Nth heat exchange module arranged in sequence along the first direction. The first heat exchange module is close to the slag discharging operation area 400, and the Nth heat exchange module is close to the water cooling operation area 500.

[0042] The slag ladle 600 (high-temperature slag ladle with a temperature of about 1200°C to 1300°C) generated in the slag discharging operation area 400 is transferred to the transportation mechanism 200. At this time, the slag ladle 600 is at a position corresponding to the first heat exchange module, and the slag ladle 600 exchanges radiant heat with the first heat exchange module to heat the water in the first heat exchange module, and the first heat exchange module realizes the recovery of high-grade waste heat from the slag ladle 600; after the slag ladle 600 completes heat exchange with the first heat exchange module, the transportation mechanism 200 transports the slag ladle 600 to the positions corresponding to the second heat exchange module, …, the Nth heat exchange module in sequence to realize the radiant heat exchange between the slag ladle 600 and the second heat exchange module, …, the Nth heat exchange module; thus, the slag ladle 600 is transported from the slag discharging operation area 400 to the water cooling operation area 500 by the transportation mechanism 200, and the same slag ladle 600 exchanges radiant heat with multiple heat exchange modules 300 in sequence to realize the effective recovery of high-grade waste heat from the slag ladle 600. It should be noted here that the heated and warmed water at the outlet of the heat exchange module 300 can be directly used for industrial heating, heating, domestic hot water supply, agricultural greenhouse heating, food cooking and sterilization, etc.

[0043] It should be noted that the 1# slag ladle 600 is generated in the slag discharging operation area 400. After the 1# slag ladle 600 completes heat exchange with the first heat exchange module, the 1# slag ladle 600 is transported to the position corresponding to the second heat exchange module. At the same time, the 2# slag ladle 600 generated in the slag discharging operation area 400 is transferred to the position corresponding to the first heat exchange module. At this time, the 1# slag ladle 600 exchanges radiant heat with the second heat exchange module, and at the same time, the 2# slag ladle 600 exchanges radiant heat with the first heat exchange module, so as to realize the radiant heat exchange of the two slag ladles 600; thus, when multiple slag ladles 600 are arranged on the transportation mechanism 200, the simultaneous radiant heat exchange of multiple slag ladles 600 and multiple heat exchange modules 300 is realized.

[0044] The high-temperature slag ladle waste heat recovery system provided by the embodiment of the present invention constructs a heat collection cover 100 between the slag discharging operation area 400 and the water cooling operation area 500. The heat collection cover 100 has a transportation channel 110 located between the slag discharging operation area 400 and the water cooling operation area 500, and a transportation mechanism 200 and multiple heat exchange modules 300 are arranged in the transportation channel 110. The transportation mechanism 200 is used to transport the slag ladle 600 in the slag discharging operation area 400 to the water cooling operation area 500. The multiple heat exchange modules 300 are arranged at intervals along the first direction, and the multiple heat exchange modules 300 exchange radiant heat with the slag ladle 600 in sequence, so as to realize the full recovery of high-grade waste heat from the slag ladle 600.

[0045] In an embodiment of the present invention, as Figure 3As shown, the recovery mechanism further includes a plurality of control valves 320, and the plurality of control valves 320 are respectively connected to the plurality of heat exchange modules 300 in one-to-one correspondence. The number of control valves 320 corresponds to the number of heat exchange modules 300; the controller is electrically connected to the plurality of control valves 320, and the controller is used to adjust the opening degrees of the plurality of control valves 320.

[0046] It should be noted that the control valve 320 can be set at the inlet of the heat exchange module 300, or the control valve 320 can be set at the outlet of the heat exchange module 300. Of course, the control valve 320 can also be set at both the inlet and the outlet of the heat exchange module 300 at the same time. Optionally, the control valve 320 is located outside the heat collection cover 100.

[0047] Exemplarily, the plurality of control valves 320 are respectively a first control valve, a second control valve,..., an Nth control valve. The first control valve is connected to the inlet of the first heat exchange module, the second control valve is connected to the inlet of the second heat exchange module, and so on. The Nth control valve is connected to the inlet of the Nth heat exchange module; the controller is respectively connected to the N control valves 320 and is used to adjust the opening, closing and opening degrees of the N control valves 320.

[0048] Taking the example that a slag package 600 (1# slag package) is generated in the slag discharging operation area 400, the 1# slag package 600 corresponds to the position of the first heat exchange module. The controller controls the first control valve to open, and the 1# slag package 600 performs radiative heat exchange with the first heat exchange module. After the heat exchange is completed; the 1# slag package 600 is transported to the corresponding position of the second heat exchange module. At the same time, the controller controls the first control valve to close and the second control valve to open, and the 1# slag package 600 performs radiative heat exchange with the second heat exchange module. Since the temperature of the 1# slag package 600 decreases after heat exchange with the first heat exchange module, the controller can adjust the opening degree of the second control valve to ensure that the water temperature at the outlet of the second heat exchange module 300 reaches the target temperature for waste heat application. It should be noted that when the 1# slag package 600 is transported to the corresponding position of the second heat exchange module and a new 2# slag package 600 is transferred to the corresponding position of the first heat exchange module, the first control valve remains in the open state.

[0049] Furthermore, the recovery mechanism further includes a plurality of fluid driving members (not shown in the figure). The number of fluid driving members corresponds to the number of heat exchange modules 300. The plurality of fluid driving members are respectively connected to the inlets of the plurality of heat exchange modules 300 in one-to-one correspondence; the controller is connected to the plurality of fluid driving members, and the controller is used to adjust the frequency of the fluid driving members so that the water temperature at the outlet of the heat exchange module 300 reaches the target temperature for waste heat application.

[0050] It can be understood that the adjustment principle of the fluid drive is the same as that of the control valve 320. For example, the 1# slag ladle 600 is transported to the corresponding position of the second heat exchange module. At the same time, the controller controls the second fluid drive to open, and the 1# slag ladle 600 exchanges radiant heat with the second heat exchange module. The frequency of the second fluid drive can be adjusted by the controller to ensure that the water temperature at the outlet of the second heat exchange module 300 reaches the target temperature for waste heat application.

[0051] In this embodiment, as Figure 3 shown, control valves 320 are provided at both the inlet and outlet of the heat exchange module 300. The controller is used to adjust the opening degree of the control valve 320 and the frequency of the fluid drive, and can dynamically control the cooling speed of the slag ladle 600 so that the water temperature at the outlet of the heat exchange module 300 reaches the target temperature for waste heat application.

[0052] Specifically, the fluid drive can be a water pump. The slag truck transfers the slag ladle 600 filled with copper slag to the transport mechanism 200 in the heat collection hood 100. The slag ladle 600 moves in the transport channel 110 along with the transport mechanism 200. At the same time, the water pump is started, and by adjusting the water pump frequency and the control valve 320 of each heat exchange module 300, it is ensured that the water temperature at the outlet of each heat exchange module 300 can reach the required temperature.

[0053] In an embodiment of the present invention, as Figures 3 to 5 shown, the heat exchange module 300 includes a heat exchange water pipe component 310. The heat exchange water pipe component 310 includes a water distribution member 311, a water collection member 312, and a plurality of heat exchange pipes 313. The water distribution member 311 and the water collection member 312 are arranged on the inner wall of the transport channel 110, and the plurality of heat exchange pipes 313 are connected between the water distribution member 311 and the water collection member 312. It should be noted here that the number of heat exchange pipes 313 in the heat exchange water pipe component 310 can be adjusted according to factors such as the actual size of the slag ladle 600 and the size of the heat exchange pipes 313.

[0054] It can be understood that the heat exchange module 300 is used for heating. A water supply pipe 340 is connected to the outlet end of the heating system. The water supply pipe 340 and the water distribution member 311 are connected through a water supply - water distribution connection pipe 350. A return water pipe 360 is connected to the inlet end of the heating system. The return water pipe 360 and the water collection member 312 are connected through a water collection - return water connection pipe 370. The heating water enters the water distribution member 311, is divided into multiple branches by the water distribution member 311, and the multiple branches respectively enter the multiple heat exchange pipes 313. The heating water exchanges radiant heat with the slag ladle 600 in the transport channel 110 during the flow in the heat exchange pipes 313 to heat the heating water. The heating water heated by the multiple heat exchange pipes 313 is collected in the water collection member 312 and flows back to the heating system through the return water pipe 360, thereby realizing the heating of the heating water.

[0055] Optionally, the number of the hot water exchange pipe components 310 is multiple. In each heat exchange module 300, the multiple hot water exchange pipe components 310 are connected in sequence. In adjacent two hot water exchange pipe components 310, the water distribution member 311 and the water collection member 312 are arranged adjacent to each other and connected. Then, the heating water sequentially passes through the multiple hot water exchange pipe components 310 to perform multiple radiation heat exchanges with the slag packages 600 in the transportation channel 110.

[0056] Furthermore, the heat exchange module 300 includes multiple hot water exchange pipe components 310, and the multiple hot water exchange pipe components 310 are arranged in sequence along the first direction.

[0057] In this embodiment, as Figure 6 shown, the heat exchange module 300 includes four hot water exchange pipe components 310, which are respectively the 1# hot water exchange pipe component, the 2# hot water exchange pipe component, the 3# hot water exchange pipe component, and the 4# hot water exchange pipe component arranged in sequence along the first direction ( Figure 6 from bottom to top in the figure). The water distribution member 311 adopts a water distributor, and the water collection member 312 adopts a water collector; the heat exchange module 300 performs radiation heat exchange with two slag packages 600.

[0058] The 1# hot water exchange pipe component includes a 1# water distributor 301, a 1# water collector 302, and multiple 1# water pipes; the 2# hot water exchange pipe component includes a 2# water distributor 303, a 2# water collector 304, and multiple 2# water pipes; the 3# hot water exchange pipe component includes a 3# water distributor 305, a 3# water collector 306, and multiple 3# water pipes; the 4# hot water exchange pipe component includes a 4# water distributor 307, a 4# water collector 308, and multiple 4# water pipes; the 1# water distributor 301 is connected to the 2# water collector 304 through a water collection-water distribution connecting pipe 330, the 2# water distributor 303 is connected to the 3# water collector 306 through a water collection-water distribution connecting pipe 330, the 3# water distributor 305 is connected to the 4# water collector 308 through a water collection-water distribution connecting pipe 330, and the 1# water collector 302 and the 4# water distributor 307 serve as the outlet and the inlet of the heat exchange module 300 respectively.

[0059] Optionally, the water flow direction of the heat exchange module 300 is opposite to the first direction to achieve countercurrent heat exchange; then, in each heat exchange module 300, the water distribution member 311 farthest from the slag discharging operation area 400 serves as the inlet of the heat exchange module 300, and the water collection member 312 closest to the slag discharging operation area 400 serves as the outlet of the heat exchange module 300.

[0060] In this embodiment, the 4# water separator 307 serves as the inlet of the heat exchange module 300 and is used to connect to the outlet end of the heating system; the 1# water collector 302 serves as the outlet of the heat exchange module 300 and is used to connect to the inlet end of the heating system. The heating water output from the outlet end of the heating system is at 60°C to 80°C. The heating water at 60°C to 80°C first enters the 4# water separator 307, exchanges radiant heat with the slag package 600 through multiple 4# water pipes, then enters the 4# water collector 308, and successively passes through the 3# water separator 305, multiple 3# water pipes, 3# water collector 306, 2# water separator 303, multiple 2# water pipes, 2# water collector 304, 1# water separator 301, and multiple 1# water pipes and converges to the 1# water collector 302. In this way, the heated heating water at 95°C to 100°C is output from the 1# water collector 302 to the inlet end of the heating system.

[0061] In the high-temperature slag package waste heat recovery system provided by the embodiment of the present invention, a plurality of heat exchange modules 300 are arranged between the slag discharging operation area 400 and the water cooling operation area 500. The waste heat of the high-temperature slag package 600 in the slow cooling stage is recovered through the plurality of heat exchange modules 300, further improving the waste heat utilization efficiency of the copper plant, and is of great significance for realizing energy conservation and emission reduction and the sustainable development of the copper smelting industry.

[0062] Optionally, the heat exchange pipes 313 are arranged on the top and / or side of the transportation passage 110.

[0063] In this embodiment, as Figure 2 shown, the cross-section of the heat collection cover 100 is in an inverted U shape. In each heat exchange water pipe component 310, the water distribution member 311 and the water collection member 312 are oppositely arranged at the lower part of the side wall of the transportation passage 110. The plurality of heat exchange pipes 313 are arranged side by side in the first direction, and the heat exchange pipes 313 are arranged on the top and side of the transportation passage 110. It should be noted that the cross-sectional shape of the heat collection cover 100 can be adjusted according to the actual situation as long as it can attach the heat exchange pipes 313 to conduct radiant heat exchange with the slag package 600.

[0064] It should be noted that in other embodiments, the heat exchange module 300 can adopt other layout modes as needed to flexibly meet different requirements, as long as it does not occupy extra space and can achieve specific functions. For example, the heat exchange module 300 includes a plurality of heat exchange water pipe components 310. At least one heat exchange water pipe component 310 is arranged on the side wall of the transportation channel 110, and at least one heat exchange water pipe component 310 is arranged on the top wall of the transportation channel 110. The water distribution members 311 and the water collection members 312 of each heat exchange water pipe component 310 are arranged at intervals along the transportation direction of the transportation channel 110, and the heat exchange pipes 313 are arranged along the transportation direction of the transportation channel 110. The plurality of heat exchange water pipe components 310 are connected end to end in sequence. Thus, the heating water output by the heating system is exchanged heat by the heat exchange water pipe component 310 on one side wall of the transportation channel 110, then enters the heat exchange water pipe component 310 on the top wall of the transportation channel 110, and is exchanged heat by the heat exchange water pipe component 310 on the other side wall of the transportation channel 110 and then returns to the inlet end of the heating system. It should be noted here that when a plurality of heat exchange water pipe components 310 are also arranged on the side wall of the transportation channel 110, the plurality of heat exchange water pipe components 310 are connected up and down end to end.

[0065] There can be a plurality of heat exchange water pipe components 310 of the heat exchange module 300. The plurality of heat exchange water pipe components 310 of the heat exchange module 300 are in series connection, and the heat exchange water pipe components 310 of the plurality of heat exchange modules 300 are in parallel connection. Thus, the series-parallel relationship can be dynamically adjusted according to the size of the heating water flow rate and the heating water heat demand to ensure normal heat exchange on the premise of normal cooling of the slag package 600. In the case where the heat exchange module 300 includes one heat exchange water pipe component 310, the water distribution member 311 serves as the inlet of the heat exchange module 300 and is used to connect to the outlet end of the heating system, and the water collection member 312 serves as the outlet of the heat exchange module 300 and is used to connect to the inlet end of the heating system.

[0066] In another embodiment of the present invention, as Figures 7 to 10 shown, the transportation channel 110 includes two side walls opposite to each other in the second direction and a top wall located between the two side walls. The height of the top wall gradually decreases from the middle to both sides, and the second direction is perpendicular to the first direction. The heat exchange module 300 includes at least one heat exchange water pipe unit 31. The heat exchange water pipe unit 31 includes two heat exchange water pipe components arranged opposite to each other in the second direction. The heat exchange water pipe component 310 includes a water distribution member 311, a water collection member 312, and a plurality of heat exchange pipes 313. The water distribution member 311 is arranged at the bottom of the side wall; the water collection member 312 is arranged in the middle of the top wall; the plurality of heat exchange pipes 313 are arranged side by side in the first direction, and each heat exchange pipe 313 is connected between the water distribution member 311 and the water collection member 312.

[0067] It can be understood that the heating water enters the water distribution member 311, is divided into multiple branches by the water distribution member 311, and the multiple branches respectively enter the multiple heat exchange water pipes 313. The heating water flows upward along the heat exchange water pipes 313 to the water collection member 312. During the flow of the heating water in the heat exchange water pipes 313, it performs radiative heat exchange with the slag package 600 in the transportation channel 110 to heat the heating water. The heating water heated by the multiple heat exchange water pipes 313 is collected in the water collection member 312 and flows back to the heating system through the return pipe, thereby realizing the heating of the heating water.

[0068] It can be understood that the height of the top wall gradually increases from one end connecting the side wall to the middle. One end of the heat exchange water pipe 313 is arranged vertically on the side wall, and the other end of the heat exchange water pipe 313 is arranged obliquely downward from top to bottom in a side area of the top wall, so that the heating water flows upward in the heat exchange water pipe 313 for heat exchange.

[0069] It should be noted that the heating water exchanges heat from bottom to top in the heat exchange water pipe 313, which can effectively prevent the situation of uneven flow rates of the multiple heat exchange water pipes 313, that is, self-adjust the heat balance through natural convection. If the flow rate of a certain heat exchange water pipe 313 is small, its temperature rises quickly, so the temperature difference between the upper and lower parts will increase, thereby enhancing the driving force and increasing the flow rate.

[0070] It should be noted that the heat exchange water pipe unit 31 includes two heat exchange water pipe components arranged oppositely in the second direction, and one heat exchange water pipe component can correspond to half of the slag package 600 to improve the installation convenience of the heat exchange module 300.

[0071] Optionally, the heat exchange water pipe unit 31 further includes a pipe connection device 380, and the pipe connection device 380 is used for connecting two relatively arranged heat exchange water pipe components.

[0072] Exemplarily, in each heat exchange water pipe unit 31, the water collection members 312 of the two heat exchange water pipe components are both arranged in the middle of the top wall, and the water collection members 312 of the two heat exchange water pipe components are detachably connected through the pipe connection device 380, so as to facilitate installation and disassembly.

[0073] Optionally, the heat exchange module 300 includes two heat exchange water pipe components 310 arranged oppositely in the second direction. The structures of the two heat exchange water pipe components 310 are the same and symmetrically arranged. The heat exchange water pipe component 310 further includes a connecting pipe 314. One end of the connecting pipe 314 is connected to the water distribution member 311, and the other end of the connecting pipe 314 corresponds to the position of the water collection member 312; of course, one end of the connecting pipe 314 can also be connected to the water collection member, and the other end of the connecting pipe 314 corresponds to the position of the water distribution member 311.

[0074] It can be understood that the water diversion member 311 is arranged at the bottom of the side wall, and the water collection member 312 is arranged in the middle of the top wall. Then, the water collection member 312 is located above the water diversion member 311. One end of the connecting pipe 314 is connected to the water diversion member 311 at a lower position, and the other end of the connecting pipe 314 extends to the middle of the top wall and corresponds to the water collection member 312. Thus, when there are multiple heat exchange water pipe units 31, it is convenient to connect two adjacent heat exchange water pipe components 310 on the same side. That is, both ends of the connecting pipe 314 are respectively connected between the water collection member 312 and the water diversion member 311 of two adjacent heat exchange water pipe components 310 along the first direction.

[0075] It should be noted that each heat exchange water pipe component 310 is provided with a connecting pipe 314, which is convenient for adjusting the number of heat exchange water pipe components 310 of the heat exchange water pipe unit 31, so that the outlet temperature of the heat exchange module 300 reaches the target temperature for waste heat application and meets the temperature usage requirements.

[0076] It should be noted that in the case where the heat exchange module may include multiple heat exchange water pipe units 31 arranged along the first direction, the multiple heat exchange water pipe components 310 on the same side in the heat exchange module 300 are in series, and the heat exchange water pipe components 310 between the two sides are in parallel. Thus, the series-parallel relationship can be dynamically adjusted according to the size of the heating water flow rate and the heating water heat demand to meet the normal heat exchange on the premise of ensuring the normal cooling of the slag package 600.

[0077] In an embodiment of the present invention, as Figure 2 shown, the outer wall of the heat collection cover 100 has a heat insulation layer 120. The heat insulation layer 120 is mainly used to reduce the heat dissipation from the inside of the heat collection cover 100 to the outside. By reducing heat loss, the waste heat recovery efficiency of the slag package 600 in the heat collection cover 100 can be improved, ensuring that more heat is effectively utilized, and contributing to improving the energy utilization efficiency of the entire system and reducing energy consumption.

[0078] Exemplarily, the thickness of the heat insulation layer 120 is 500 mm.

[0079] In an embodiment of the present invention, as Figures 1 to 3 shown, the transportation mechanism 200 includes a transportation track 210, a transfer component, and a power system (not shown in the figure). The transportation track 210 is laid on the bottom surface of the transportation channel 110. The transfer component is arranged on the transportation track 210, and the power system is connected to the transfer component. The power system is used to drive the transfer component to move along the transportation track 210 to transport the slag package 600 in the slag discharging operation area 400 to the water cooling operation area 500 and stay at the corresponding position of the heat exchange module 300 for a preset duration to realize the radiative heat exchange between the heat exchange module 300 and the slag package 600.

[0080] It is understandable that the fluid driving member drives the hot water in the heat exchange module 300 to flow, and the transfer assembly moves under the drive of the power system according to the generation rate of the slag package 600, realizing the radiative heat exchange between the slag package 600 and the heating water in the heat exchange module 300.

[0081] Exemplarily, the power system can be an electric drive system, such as a rail vehicle. It should be noted that the movement of the transfer assembly can be powered by electricity through the track, or by a storage battery, or other power supply methods.

[0082] Optionally, the transfer assembly includes a plurality of transfer trolleys 221 detachably connected in sequence at the head and tail. The transfer trolleys 221 move according to the law of generating the slag package 600. The transfer assembly is translated as a whole once, so that the slag package 600 moves from the current heat exchange module 300 to the corresponding position of the next heat exchange module 300.

[0083] Exemplarily, the transport track 210 can be arranged in a serpentine shape. Of course, it can also be arranged in an L shape or other arrangements according to needs.

[0084] As Figure 2 and Figure 3 shown, the transfer trolley 221 includes a transfer flat plate 2211, wheels 2212 and a fixing device 2213. The wheels 2212 are connected to the lower side of the transfer flat plate 2211 and are arranged on the transport track 210; the upper side of the transfer flat plate 2211 is used to place the slag package 600, and the fixing device 2213 is arranged on the upper surface of the transfer flat plate 2211. The fixing device 2213 is used to fix the position of the slag package 600 on the transfer flat plate 2211.

[0085] Specifically, the slag package 600 is generated in the slag discharging operation area 400 (slag discharging workshop). The slag package 600 containing copper slag is transported to the entrance of the transport passage 110 by a slag transport vehicle and then to the frontmost transfer trolley 221 of the transfer assembly. The power system drives the transfer assembly to move from the side close to the slag discharging operation area 400 to the side close to the water cooling operation area 500. The slag package 600 moves in the transport passage 110 along with the transfer assembly. The fluid driving member is synchronously started, and by adjusting the frequency of the fluid driving member and the opening degree of the control valve 320 connected to each heat exchange module 300, it is ensured that the outlet temperature of each heat exchange module 300 after heat exchange with the slag package 600 reaches the waste heat application target temperature, and it is ensured that the cooling rate of the slag package 600 meets the process requirements. It should be noted that when a new slag package 600 is generated, the slag package 600 on the rearmost transfer trolley 221 is transferred to the water cooling operation area 500 (spray cooling area), and at the same time, the rearmost transfer trolley 221 returns to the entrance of the transport passage 110 to prepare for transporting the next slag package 600, thereby realizing the waste heat recovery of the slag package 600. Here, it should be noted that the rearmost transfer trolley 221 is the transfer trolley 221 closest to the water cooling operation area 500.

[0086] The high-temperature slag ladle waste heat recovery system provided by the embodiments of the present invention has the characteristics of simple equipment and little impact on the original process. Through multiple heat exchange modules 300, the waste heat recovery rate can be improved, which is helpful for energy conservation, emission reduction and sustainable development of copper plants.

[0087] Based on the high-temperature slag ladle waste heat recovery system provided by any of the above embodiments, an embodiment of the second aspect of the present invention proposes a high-temperature slag ladle waste heat recovery method, as Figure 11 shown. The waste heat recovery method includes the following steps: Step 10: Transfer the slag ladle 600 in the slag discharging operation area 400 to the transportation mechanism 200.

[0088] Step 20: The transportation mechanism 200 transports the slag ladle 600 to the water cooling operation area 500 and stops at a preset duration at the corresponding position of each heat exchange module 300. The heat exchange module 300 performs radiative heat exchange with the slag ladle 600.

[0089] It can be understood that the slag ladle 600 generated in the slag discharging operation area 400 is transferred to the entrance of the transportation channel 110 of the heat collection cover 100 and then transferred to the transportation mechanism 200. The transportation mechanism 200 transports the slag ladle 600 from the entrance of the transportation channel 110 to the water cooling operation area 500 and stops at a preset duration at the corresponding position of each heat exchange module 300, so that the slag ladle 600 performs radiative heat exchange with the heat exchange module 300. In this way, the transportation mechanism 200 transports the slag ladle 600 from the slag discharging operation area 400 to the water cooling operation area 500, and the same slag ladle 600 performs radiative heat exchange with multiple heat exchange modules 300 in sequence to effectively recover the high-grade waste heat of the slag ladle 600.

[0090] It should be noted that each heat exchange module 300 can perform radiative heat exchange with multiple slag ladles 600. By way of example, as Figure 3 shown, one heat exchange module 300 performs radiative heat exchange with two slag ladles 600.

[0091] Optionally, the waste heat recovery method further includes the following content: By adjusting the number of the heat exchange water pipe units 310 of the heat exchange module 300, the outlet temperature of the heat exchange module 300 is made to reach the waste heat application target temperature, so as to meet the temperature use requirements.

[0092] It can be understood that the heat exchange efficiency is controlled by adjusting the number of heat exchange water pipe units 310 in the heat exchange module 300, so as to accurately adjust the outlet temperature of the heat exchange module 300. Specifically, when it is necessary to increase the outlet temperature of the heat exchange module 300, the number of heat exchange water pipe units 310 can be appropriately increased; conversely, when it is necessary to decrease the outlet temperature, the number of heat exchange water pipe units 310 can be decreased. Through this dynamic adjustment method, it can be ensured that the outlet temperature of the heat exchange module 300 is always stable within the target temperature range required for waste heat application, and finally the precise use requirements of the downstream process or equipment for temperature can be met, ensuring the efficient and stable operation of the waste heat recovery system.

[0093] Optionally, the waste heat recovery method further includes the following content: By adjusting the flow rate of the heat exchange module 300 and / or the number of heat exchange water pipe units 310 of the heat exchange module 300, the cooling rate of the slag ladle 600 is regulated to ensure the cooling process requirements of the slag ladle 600.

[0094] It can be understood that by adjusting the heating water flow rate of the heat exchange module 300 and / or the number of heat exchange water pipe units 310, precise control of the cooling rate of the slag ladle 600 is achieved. Specifically, when it is necessary to accelerate the cooling of the slag ladle 600, the heating water flow rate can be increased to improve the heat exchange efficiency, or the number of heat exchange water pipe units 310 can be increased to expand the heat exchange area; conversely, when it is necessary to slow down the cooling rate, the heating water flow rate can be decreased or the number of heat exchange water pipe units 310 can be decreased. This dual-parameter regulation method can be flexibly adjusted according to process requirements to ensure that the slag ladle 600 always maintains the best temperature change curve during the cooling process, avoiding slag cracking or structural defects caused by excessive cooling and preventing slow cooling from affecting production efficiency, thus fully meeting the various technical requirements of the cooling process of the slag ladle 600.

[0095] Furthermore, as Figure 12 shown, the waste heat recovery method further includes the following steps: Step 30: Adjust at least one of the opening degree of the control valve 320 at the inlet of the heat exchange module 300, the opening degree of the control valve 320 at the outlet of the heat exchange module 300, and the frequency of the fluid driving part at the inlet of the heat exchange module 300, so that the outlet water temperature of the heat exchange module 300 reaches the waste heat application target temperature.

[0096] In this embodiment, control valves 320 are provided at both the inlet and outlet of the heat exchange module 300, and a fluid driving part is provided at the inlet of the heat exchange module 300. By adjusting the opening degree of the control valve 320 and the frequency of the fluid driving part through the controller, the cooling speed of the slag ladle 600 can be dynamically controlled, so that the outlet water temperature of the heat exchange module 300 reaches the waste heat application target temperature.

[0097] Specifically, the fluid driving member can be a water pump. The slag ladle car transports the slag ladle 600 filled with copper slag to the transport mechanism 200 inside the heat collection cover 100. The slag ladle 600 moves along with the transport mechanism 200 in the transport channel 110. Meanwhile, the water pump is turned on, and by adjusting the water pump frequency and the control valves 320 of each heat exchange module 300, it is ensured that the water temperature at the outlet of each heat exchange module 300 can reach the required temperature.

[0098] In a specific embodiment of the present invention, a plurality of heat exchange modules 300 are arranged on the inner wall of the heat collection cover 100, which are respectively the first heat exchange module, the second heat exchange module,..., the Nth heat exchange module arranged in sequence from front to back. The working process of the high-temperature slag ladle waste heat recovery system specifically includes the following steps: Step 1: Load the molten copper slag discharged from the slag discharging operation area 400 (slag discharging workshop) into the 1# slag ladle 600, and then the slag ladle car transfers the 1# slag ladle 600 to the frontmost transfer trolley 221 of the transfer assembly.

[0099] Step 2: Turn on the water pump of the frontmost first heat exchange module for heating water circulation. The 1# slag ladle 600 and the heating water in the first heat exchange module recover waste heat through radiative heat exchange, and remain stationary for a preset duration to complete the radiative heat exchange between the 1# slag ladle 600 and the first heat exchange module.

[0100] Step 3: The transfer assembly moves once towards the outlet side of the transport channel 110, so that the 1# slag ladle 600 moves to the position corresponding to the second heat exchange module, and the 1# slag ladle conducts radiative heat exchange with the second heat exchange module again. Meanwhile, the newly generated 2# slag ladle 600 is transferred to the position corresponding to the first heat exchange module and conducts radiative heat exchange with the first heat exchange module.

[0101] Step 4: Repeat Step 3 until there are N slag ladles 600 arranged on the transfer assembly and the N slag ladles 600 correspond to the positions of the N heat exchange modules; in this way, the slag ladle 600 is transported from the slag discharging operation area 400 to the water cooling operation area 500 through the transport mechanism 200. The same slag ladle 600 can conduct radiative heat exchange with multiple heat exchange modules 300 in sequence, and at the same time, simultaneous radiative heat exchange of multiple slag ladles 600 can be realized.

[0102] Step 5: When a new slag ladle 600 is generated, the slag ladle 600 on the rearmost transfer trolley 221 is transferred to the water cooling operation area 500 (spray cooling area), and at the same time, the rearmost transfer trolley 221 returns to the entrance of the transport channel 110 to prepare for transporting the next slag ladle 600.

[0103] Step 6: The newly generated slag ladle 600 is transferred to the frontmost transfer trolley 221, and the transfer trolley 221 enters the transport channel 110.

[0104] Step 7: Whenever a new slag packet 600 is generated, repeat Step 5 and Step 6. The slag packets 600 are replaced in the order of advancing at the front and exiting at the rear, realizing continuous waste heat recovery of the slag packets 600.

[0105] It should be noted that the heat exchange module 300 can perform radiative heat exchange with multiple slag packets 600. Thus, the transportation mechanism 200 transports multiple slag packets 600 as a whole synchronously, and each time a corresponding number of slag packets 600 are generated, the transportation mechanism 200 moves once. It should be noted that according to the radiative heat exchange situation between the slag packet 600 and the heating water, the opening degree of the control valve and the pump frequency can be adjusted dynamically in real time to control the cooling rate of the copper slag to ensure the recovery rate of the process copper.

[0106] An embodiment of the third aspect of the present invention proposes a design method for a high-temperature slag packet waste heat recovery system. The design method includes the following steps: S1. Construct a heat collection cover 100, and the heat collection cover 100 has a transportation channel 110 located between the slag discharging operation area 400 and the water cooling operation area 500.

[0107] S2. Determine the number, size, and corresponding flow rate of the water pipes based on the size parameters of the slag packet 600 and engineering experience.

[0108] S3. Determine the target heat exchange amount based on the inlet water temperature, the target temperature for waste heat application, and the corresponding water flow rate.

[0109] S4. Determine the number of heat exchanges of the slag packet 600 based on the target heat exchange amount and the cooling and heat dissipation power of the slag packet 600.

[0110] S5. Determine the residence time of the slag packet 600 according to the generation rate of the slag packet 600, and the total number of slag packets 600 arranged between the slag discharging operation area 400 and the water cooling operation area 500. Then, determine the total flow rate of the heated heating water according to the number of heat exchanges of the slag packet 600.

[0111] It can be understood that the heat collection cover 100 is constructed according to the space between the slag discharging operation area 400 and the water cooling operation area 500. A transportation channel 110 is formed inside the heat collection cover 100, and the transportation channel 110 can be arranged in a serpentine shape. Design the dimensional parameters of the water pipe, which include the water pipe diameter and the water pipe length. According to the size of the slag ladle 600 and the size of the water pipe, determine the number of water pipes corresponding to the arrangement of the slag ladle 600 and the corresponding flow rate. Based on the inlet water temperature and the target temperature for waste heat application, as well as the corresponding water flow rate, determine the number of slag ladles 600 corresponding to the heat exchange of the heat exchange module 300. Then, determine the residence time of the slag ladle 600 according to the generation rate of the slag ladle 600, and determine the total number of slag ladles 600 arranged in the transportation channel 110 according to the length of the transportation channel 110 between the slag discharging operation area 400 and the water cooling operation area 500. Then, determine the total heated heating water flow rate according to the number of slag ladles 600 corresponding to a single heat exchange module 300.

[0112] It should be noted that the number of heat exchanges of the slag ladle 600, that is, the slag ladles 600 representing the number of heat exchanges are arranged in sequence along the transportation direction of the transportation channel 110 and are grouped together to exchange heat with a heat exchange module 300. The number of heat exchanges of the slag ladle 600 can be one or more.

[0113] For example, a heat exchange module 300 conducts radiative heat exchange with two slag ladles 600. If the slag discharging operation area 400 generates one slag ladle 600 every half hour, the generation speed of the slag ladle is 2 ladles / h, that is, the residence time of the slag ladle 600 is 1 h, which means the radiative heat exchange time between the heat exchange module 300 and the two slag ladles 600 is 1 h. The moving step of the transportation mechanism 200 is the distance of two slag ladles. For example, if there are slag ladle positions A, B, C, and D arranged in sequence along the transportation direction in the slag discharging operation area 400 and the water cooling operation area 500, after the slag ladles at the A slag ladle position and the B slag ladle position stay for 1 h, the transportation mechanism 200 transports the slag ladles at the A slag ladle position and the B slag ladle position to the C slag ladle position and the D slag ladle position respectively, and at the same time, the newly generated slag ladles in the slag discharging operation area 400 are placed at the A slag ladle position and the B slag ladle position.

[0114] It should be noted that in other embodiments, if the slag discharging operation area 400 generates one slag ladle 600 every half hour, the generation speed of the slag ladle is 1 ladle per half hour, the residence time of the slag ladle 600 can also be 0.5 h, and the moving step of the transportation mechanism 200 is the distance of one slag ladle. For example, after the slag ladle at the A slag ladle position stays for 0.5 h, the transportation mechanism 200 transports the slag ladle at the A slag ladle position to the B slag ladle position, and at the same time, the newly generated slag ladles in the slag discharging operation area 400 are placed at the A slag ladle position.

[0115] In an embodiment of the present invention, when the hot water pipe assembly 300 includes a plurality of heat exchange water pipe components arranged in sequence along the first direction, such as Figure 6As shown, two slag ladles 600 form a group of slag ladles. A group of slag ladles corresponds to a heat exchange module 300 in position, so that the two slag ladles 600 conduct radiative heat exchange with a heat exchange module 300. It should be noted that a heat exchange module 300 can also conduct heat exchange with one or three or more slag ladles 600. Specifically, it can be adjusted according to the actual situation, as long as the heat exchange effect of the heating water and the cooling effect of the slag ladles 600 can be ensured.

[0116] In this embodiment, the high-temperature slag ladle waste heat recovery system is arranged between the slag discharging operation area 400 and the water cooling operation area 500. Taking a copper plant as an example, the production speed of the slag ladles in the copper plant is 2 ladles / h, the air slow cooling time is 30 h (hours), the total water flow is 2260 t / h (tons per hour), and the specific structures and parameters of the components in the system are as follows: 1) Slag ladle The slag ladle is frustum-shaped, with a top circle diameter of 3.45 m (meters), a bottom circle diameter of 1.78 m, a height of 2.91 m, and a wall thickness of the slag ladle of 0.15 m.

[0117] 2) Transfer trolley The width of the transfer trolley is 3.5 m.

[0118] 3) Single water pipe The outer diameter of the single water pipe is 60 mm (millimeters), the inner diameter is 50 mm, and there are 15 water pipes in a single heat exchange water pipe component. The distance between adjacent two water pipes is 45 mm, and the total width of a single heat exchange water pipe component is 1530 mm.

[0119] 4) Water distributor and water collector The water distributor and the water collector have the same size, with an inner diameter of 210 mm, a wall thickness of 6 mm, an outer diameter of 222 mm, and a length of 1700 mm. It should be noted that the number of water pipes corresponding to each water distributor and water collector can be specifically adjusted according to factors such as the actual size of the slag ladle.

[0120] 5) Elbow The single water pipe is arranged at the top and both side parts of the transportation passage. The water pipe section at the top and the water pipe section at the side are connected by an elbow. As Figure 13 shown, the center line of the elbow is 76 mm away from A, the inner diameter of the elbow is 46 mm (A - single water pipe outer diameter / 2), the outer diameter of the elbow is 106 mm (A + single water pipe outer diameter / 2), where the outer diameter D of the single water pipe is 60 mm.

[0121] 6) Slag ladle arrangement The distance between the outer walls of two adjacent slag ladles is 0.5 m, and the distance between the centers of two adjacent slag ladles is 3.95 m.

[0122] 7) Water pipe, water distributor and water collector arrangement The water pipe is arranged on the inner wall of the heat collection cover. The distance between the water pipe and the outer wall of the heat collection cover is 200 mm. The water distributor and the water collector are arranged in pairs and are arranged at the bottoms of the opposite side walls of the heat collection cover. The distance between the top of the water distributor (and the water collector) and the top wall of the heat collection cover is 3.3 m, and the distance between the bottom of the water distributor (and the water collector) and the ground is 0.72 m.

[0123] One slag ladle corresponds to two heat exchange water pipe components. The distance between the water distributor and the water collector of the two heat exchange water pipe components is 50 mm.

[0124] 8) Water flow velocity of the water pipe The production rate of the slag ladle is 2 ladles / h, and the air slow cooling time is 30 h. Therefore, there are 60 slag ladles with different cooling degrees at the same time. The temperature is set with the inlet water temperature of 60°C - 80°C and the outlet water temperature of 95°C - 100°C.

[0125] As Figure 6 shown, two slag ladles are taken as a group. The heating water at 60°C - 80°C first enters the 4# water distributor, exchanges radiation heat with the slag ladle through multiple 4# water pipes and then enters the 4# water collector. Then it successively passes through the 3# water distributor, multiple 3# water pipes, 3# water collector, 2# water distributor, multiple 2# water pipes, 2# water collector, 1# water distributor, and multiple 1# water pipes and converges to the 1# water collector. The heating water at 95°C - 100°C after heating is output from the 1# water collector to the inlet end of the heating system. The water flow rate of a single heat exchange module is 75.33 t / h, the flow rate of each water pipe is 5.02 t / h, the corresponding single water pipe flow velocity is 0.71 m / s (meter per second), and the specific frictional resistance is 69 Pa / m (Pascal per meter). Therefore, the water flow rate of a single heat exchange module is 75.33 t / h, there are 60 / 2 = 30 groups in total, and the total heating water flow rate is 2260 t / h.

[0126] In another embodiment of the present invention, the hot water pipe assembly 300 includes a plurality of heat exchange water pipe units 31 arranged along the first direction. The heat exchange water pipe unit 31 includes two heat exchange water pipe components 310 arranged oppositely along the second direction. A plurality of heat exchange water pipe components on the same side are connected in series along the first direction. As Figure 10 shown, two slag ladles 600 are taken as a group of slag ladles. A group of slag ladles corresponds to a heat exchange module 300 in position. Thus, two slag ladles 600 exchange radiation heat with a heat exchange module 300.

[0127] In this embodiment, the high-temperature slag ladle waste heat recovery system is arranged between the slag discharging operation area 400 and the water cooling operation area 500. The production speed of the slag ladle is 2 ladles / h, the air slow cooling time is 30 h (hours), and the total water flow rate is 1800 t / h (tons per hour). The specific structures and parameters of each component in the system are as follows: 1) Slag ladle The slag ladle is frustum-shaped, with a top circular diameter of 3.45 m (meters), a bottom circular diameter of 1.78 m, a height of 2.91 m, and a wall thickness of 0.15 m for the slag ladle.

[0128] 2) Transfer trolley The width of the transfer trolley is 3.5 m.

[0129] 3) Single water pipe The outer diameter of the single water pipe is 60 mm (millimeters), the inner diameter is 50 mm, and there are 20 pipes in a single heat exchange water pipe component. The spacing between adjacent two pipes is 45 mm, and the total width of a single heat exchange water pipe component is 2055 mm.

[0130] 4) Connecting pipe The outer diameter of the connecting pipe is 159 mm and the inner diameter is 149 mm.

[0131] 5) Water distributor and water collector The water distributor and water collector have the same dimensions, with an inner diameter of 210 mm, a wall thickness of 6 mm, an outer diameter of 222 mm, and a length of 2400 mm.

[0132] 6) Slag ladle layout The distance between the outer walls of adjacent two slag ladles is 0.5 m, and the distance between the centers of adjacent two slag ladles is 3.95 m.

[0133] 7) Layout of water pipes, water distributor and water collector The water pipes are arranged on the inner wall of the heat collection cover. The distance between the water pipes and the outer wall of the heat collection cover is 100 mm. The distance between the top of the water distributor and the top wall of the heat collection cover is 3.3 m.

[0134] 8) Water flow velocity in water pipes The production rate of slag ladles is 2 ladles / h, and the air slow cooling time is 30 h. Therefore, there are 60 slag ladles with different cooling degrees at the same time. The designed water flow rate is 1800 t / h.

[0135] Due to the relatively high temperature of the slag ladles, four slag ladles can be taken as a group. 60 slag ladles can be divided into 15 groups. The temperature is set with an inlet water temperature of 60°C to 80°C and an outlet water temperature of 95°C to 100°C.

[0136] For each set of four slag packages, they can be responsible for the heat transfer of two hot water pipe units (one on each side of the slag package). The water flow rate of the hot water pipe unit is 60 t / h, the pipe flow velocity is 0.96 m / s (meters per second), the specific friction loss is 81 Pa / m (Pascals per meter), the flow rate of each hot water pipe is 3 t / h, the corresponding flow velocity of a single hot water pipe is 0.42 m / s (meters per second), and the specific friction loss is 63 Pa / m (Pascals per meter). Each hot water pipe unit is responsible for heating 60 t / h of heating water, and each heat exchange module is responsible for heating 120 t / h of heating water. Therefore, the total heating water flow rate that 15 groups can be responsible for is 1800 t / h.

[0137] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A high-temperature slag ladle waste heat recovery system, characterized in that Comprising: A heat collection cover, the heat collection cover having a transport passage located between the slag discharging operation area and the water cooling operation area; A transport mechanism, arranged in the transport passage, the transport mechanism being used to transport the slag packages in the slag discharging operation area to the water cooling operation area; A recovery mechanism, including a plurality of heat exchange modules arranged in sequence along a first direction, the heat exchange modules being arranged on the inner wall of the transport passage, the heat exchange modules being used for radiative heat exchange with the slag packages, and the first direction being the transport direction of the transport mechanism.

2. The high-temperature slag ladle waste heat recovery system according to claim 1, wherein The transport passage includes two side walls opposite to each other along a second direction, and a top wall located between the two side walls, the height of the top wall gradually decreasing from the middle to both sides, and the second direction being perpendicular to the first direction; The heat exchange module includes at least one heat exchange water pipe unit, and each heat exchange water pipe unit includes two heat exchange water pipe components arranged opposite to each other along the second direction, and each heat exchange water pipe component includes: A water distribution member, arranged at the bottom of the side wall; A water collection member, arranged in the middle of the top wall; A plurality of heat exchange pipes, the plurality of heat exchange pipes being arranged side by side along the first direction, and each heat exchange pipe being connected between the water distribution member and the water collection member; When the heat exchange module includes a plurality of the heat exchange water pipe units arranged along the first direction, the plurality of heat exchange water pipe components on the same side are connected in series in sequence along the first direction.

3. The high-temperature slag ladle waste heat recovery system according to claim 2, characterized in that, The heat exchange water pipe component further includes a connecting pipe, one end of the connecting pipe being connected to the water distribution member or the water collection member, and the other end of the connecting pipe corresponding to the position of the water collection member or the water distribution member.

4. The high-temperature slag ladle waste heat recovery system according to claim 1, characterized in that The heat exchange module includes at least one heat exchange water pipe unit, and each heat exchange water pipe unit includes: A water distribution member; A water collection member, the water distribution member and the water collection member being arranged on the side wall of the transport passage; A plurality of heat exchange pipes, connected between the water distribution member and the water collection member; when there are a plurality of the heat exchange water pipe units, the water distribution members and the water collection members of two adjacent heat exchange water pipe units are connected.

5. The high-temperature slag ladle waste heat recovery system according to any one of claims 2 to 4, characterized in that, The plurality of heat exchange water pipe units are arranged in sequence along the first direction, the water distribution member farthest from the slag discharging operation area being used as the inlet of the heat exchange module; the water collection member closest to the slag discharging operation area being used as the outlet of the heat exchange module.

6. The high-temperature slag ladle waste heat recovery system according to any one of claims 1 to 4, characterized in that, The recovery mechanism further includes: A plurality of control valves, the plurality of control valves being connected to the plurality of heat exchange modules one by one; A controller, electrically connected to the plurality of control valves, the controller being used to adjust the opening degrees of the plurality of control valves.

7. The high-temperature slag ladle waste heat recovery system according to claim 6, characterized in that, The recovery mechanism further includes: A plurality of fluid driving members, the plurality of fluid driving members being connected to the plurality of heat exchange modules one by one; The controller is connected to the plurality of fluid driving members, and the controller is used to adjust the frequency of the fluid driving members so that the water temperature at the outlet of the heat exchange module reaches the target temperature for waste heat application.

8. A method for recovering waste heat from a high-temperature slag ladle, characterized in that, Based on the high-temperature slag package waste heat recovery system according to any one of claims 1 to 7, the method includes: Transferring the slag packages in the slag discharging operation area to the transport mechanism; The transport mechanism transports the slag packages to the water cooling operation area and stops at the corresponding position of each heat exchange module for a preset duration, so that the heat exchange module conducts radiative heat exchange with the slag packages.

9. The method for recovering waste heat from a high-temperature slag ladle according to claim 8, characterized in that, The method further includes: By adjusting the number of the heat exchange water pipe units of the heat exchange module, the outlet temperature of the heat exchange module is made to reach the target temperature for waste heat application, so as to meet the temperature usage requirements.

10. The method for recovering waste heat from high-temperature slag ladles according to claim 9, wherein, The method further includes: By adjusting the flow rate of the heat exchange module and / or the number of the heat exchange water pipe units of the heat exchange module, the cooling rate of the slag ladle is regulated to ensure the cooling process requirements of the slag ladle.

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