A multi-slag-tank waste heat recovery system for copper slag waste heat

Abstract

The application provides a multi-slag-tank waste heat recovery system for copper slag waste heat, and belongs to the technical field of non-ferrous metallurgical molten slag waste heat recovery, and specifically comprises a central fixed base, a central transfer device, a driving device and a plurality of trolleys. The central transfer device comprises a mounting seat, a steam collection assembly, a first external input main pipeline and a first internal input main pipeline. The mounting seat is rotatably mounted on the central fixed base, the steam collection assembly is fixed on the mounting seat, and the first internal input main pipeline is in communication with the first external input main pipeline through a rotary joint. The plurality of trolleys are fixedly connected with the mounting seat, and an annular heat exchanger is fixed on each trolley. The inlet of the annular heat exchanger is in communication with the first internal input main pipeline, and the outlet of the annular heat exchanger is in communication with the steam collection assembly. The driving device drives the mounting seat and the plurality of trolleys to rotate around the central fixed base. Through the processing scheme, the stability and reliability of the multi-slag-tank waste heat recovery system are improved.

Description

Technical Field

[0001] This application relates to the field of waste heat recovery from molten slag in nonferrous metallurgy, and in particular to a multi-slag pot waste heat recovery system for copper slag. Background Technology

[0002] Copper smelting generates a large amount of high-temperature copper slag. When discharged from the furnace, the slag typically contains a significant amount of sensible heat. Traditional methods often involve collecting the slag in slag pots, air cooling or slow cooling in the slag yard, followed by crushing, grinding, flotation, or utilization in building materials. This approach suffers from problems such as long cooling cycles, a large number of slag pots required, large storage areas, significant waste heat loss, and uncontrollable cooling processes.

[0003] Existing solutions include external heat exchangers for slag pots, tube heat exchangers, fixed-station heat exchangers, mobile heat exchangers, and waste heat boilers, which can recover the sensible heat of high-temperature molten slag to a certain extent. However, in multi-slag pot continuous processing scenarios, if a fixed energy station is connected to a mobile trolley one by one, each trolley needs to repeatedly connect and disconnect the feedwater, steam, blowdown, and instrument interfaces when entering the processing station. For high-temperature steam or steam-water mixtures, repeated disconnection and reconnection increases the risk of leakage, burns, misoperation, and seal failure. If a steam rotary joint is used as the main connection method, it will be limited by temperature, pressure, sealing materials, and service life, making it difficult to meet the long-term stable operation requirements of high-temperature and high-pressure media. Summary of the Invention

[0004] In view of this, this application provides a multi-slag pot waste heat recovery system for copper slag waste heat, which solves the problems in the prior art and improves the stability and reliability of the multi-slag pot waste heat recovery system.

[0005] The technical solution provided in this application for a multi-slag pot waste heat recovery system for copper slag waste heat is as follows:

[0006] A multi-slag pot waste heat recovery system for copper slag waste heat includes a central fixed base, a central transfer device, a drive device, and multiple trolleys; The central transfer device includes a mounting base, a steam collection assembly, a first external input main pipe, and a first internal input main pipe. The mounting base is rotatably mounted on a central fixed base, the steam collection assembly is fixedly mounted on the mounting base, the first external input main pipe is fixedly mounted on the central fixed base, and the first internal input main pipe is connected to the first external input main pipe through a rotary joint. Multiple trolleys surround the outer periphery of the central fixed base. The multiple trolleys are fixedly connected to the mounting base via brackets. An annular heat exchanger is fixed on each trolley. The area on the trolley corresponding to the inner ring of the annular heat exchanger is used to place a slag pot. The inlet of the annular heat exchanger is connected to the first internal main inlet pipe via a branch inlet pipe. The outlet of the annular heat exchanger is connected to the steam collection assembly via a branch recovery pipe. The drive device is used to drive the mounting base and the multiple trolleys to rotate around the central fixed base.

[0007] Optionally, the multi-slag pot waste heat recovery system also includes a moving device. The trolley is also equipped with a tube heat exchanger, which is used to be placed inside the slag pot where heat is to be recovered. The moving device is used to drive the tube heat exchanger to move from outside the vertical annular area covered by the annular heat exchanger to inside the slag pot. The inlet of the tube heat exchanger is connected to the first internal main inlet pipe via a branch inlet pipe, and the outlet of the tube heat exchanger is connected to the steam collection assembly via a branch recovery pipe.

[0008] Optionally, the mobile device includes a horizontal drive assembly, a mounting frame, and a lifting assembly mounted on a trolley. The horizontal drive assembly is fixed on the trolley, the mounting frame is mounted on the output end of the horizontal drive assembly, the lifting assembly is mounted on the mounting frame, and the tube heat exchanger is mounted on the output end of the lifting assembly. The horizontal drive assembly is located outside the vertical annular area covered by the annular heat exchanger. The horizontal drive assembly is used to drive the mounting bracket, the lifting assembly and the tube heat exchanger to move between the inside and outside of the vertical annular area covered by the annular heat exchanger. The lifting assembly is used to drive the tube heat exchanger to move up and down. The horizontal drive component is a horizontal rotation drive mechanism or a translation drive mechanism.

[0009] Optionally, the central transfer device further includes a second external input main pipe and a second internal input main pipe, the second external input main pipe being fixed on a central fixed base, and the second external input main pipe and the second internal input main pipe being connected through a rotary joint; The branch input pipelines of the annular heat exchanger and the tube heat exchanger are simultaneously connected to the first internal input main pipeline and the second internal input main pipeline through a tee joint and a connecting pipe, and an input control valve is provided on the connecting pipe corresponding to the first internal input main pipeline and the second internal input main pipeline. The first external input main pipe and the second external input main pipe are connected to different heat exchange medium sources.

[0010] Optionally, the driving device drives the trolley to rotate intermittently along a first direction at a fixed distance. The slag discharge port of the smelting furnace is located above the movement path of the trolley. The corresponding position of the slag discharge port of the smelting furnace is defined as the slag discharge station. The slag pot on the trolley of the slag discharge station is used to receive the copper slag discharged from the smelting furnace. The multi-slag pot waste heat recovery system also includes a control module, a positioning detection unit and an identification unit located at the slag discharge station. Each of the trolleys is equipped with an identification code that is read by the identification unit and has trolley number information. Each trolley is equipped with a slag pot seating detection unit and a weighing sensor. The slag pot seating detection unit is used to detect whether the slag pot on the trolley is in position. The control module is communicatively connected to the slag discharge system of the smelting furnace. The control module is electrically connected to the drive device, the positioning detection unit, the slag pot seating detection unit, the weighing sensor, and the identification unit. The control module determines whether the slag pot is empty based on the value output by the weighing sensor. The control module is configured to: when the slag pot on the trolley is detected by the detection unit and is determined to be in position or empty, change the status of the corresponding trolley to standby; when the smelting furnace is scheduled to discharge slag, based on the trolley number of the current slag discharge station and the relative position of each trolley, control the drive device to rotate a trolley in standby mode to the slag discharge station; when the identification unit of the slag discharge station identifies the trolley in standby mode and the position detection unit outputs that the trolley is in position, change the status of the corresponding trolley to empty pot ready-to-load mode and output slag discharge permission to the smelting furnace's slag discharge system; when the smelting furnace's slag discharge system starts discharging slag, change the status of the corresponding trolley to slag receiving mode; and when the smelting furnace's slag discharge system completes slag discharge, control the drive device to rotate a fixed distance.

[0011] Optionally, the trolley is equipped with a slag pot wall temperature detection unit and a copper slag temperature detection unit inside the slag pot, the branch recovery pipeline is equipped with a medium temperature detection unit and a pressure detection unit, the input control valve is a solenoid valve, and the control module is electrically connected to the position detection unit, the slag pot wall temperature detection unit, the copper slag temperature detection unit inside the slag pot, the medium temperature detection unit, the pressure detection unit, the input control valve, and the moving device. The control module is configured to: open the input control valve between the annular heat exchanger and the first internal input main pipe, and open the input control valve between the annular heat exchanger and the second internal input main pipe, according to preset rules, and modify the status of the corresponding trolley to waste heat recovery state or temperature control cooling state; and open the input control valve between the tube heat exchanger and the first internal input main pipe, and open the input control valve between the tube heat exchanger and the second internal input main pipe, according to preset rules, and modify the status of the corresponding trolley to waste heat recovery state or temperature control cooling state; wherein, the preset rules include judging the values ​​detected by the slag pot wall temperature detection unit, the copper slag temperature detection unit in the slag pot, the medium temperature detection unit and the pressure detection unit in the branch recovery pipeline. When the temperature detected by the slag pot wall temperature detection unit drops to the first preset temperature value, the input control valve corresponding to the annular heat exchanger on the corresponding trolley is closed; when the temperature detected by the copper slag temperature detection unit inside the slag pot drops to the second preset temperature value, the input control valve corresponding to the tube heat exchanger on the corresponding trolley is closed; when the temperature detected by the slag pot wall temperature detection unit drops to the first preset temperature value, the temperature detected by the copper slag temperature detection unit inside the slag pot drops to the second preset temperature value, and all input control valves are closed, the drive device is controlled to move the tube heat exchanger out of the vertical annular area covered by the annular heat exchanger, and the state of the corresponding trolley is changed to slag discharge state; when the medium temperature detection unit and pressure detection unit exceed the preset safety range, all control valves corresponding to the corresponding trolley are closed; The control module is also configured to: when the copper slag temperature detected by the copper slag temperature detection unit in the slag pot is 900-970℃, control the opening of the input control valve between the annular heat exchanger and / or the tube heat exchanger and the first internal input main pipe, so as to control the cooling rate of the copper slag in the slag pot to be 5-50℃ / h.

[0012] Optionally, the steam collection assembly includes a steam drum, a main steam output pipeline, and a main steam recovery pipeline. The main steam output pipeline is connected to the outlet of the steam drum, and the main steam recovery pipeline is connected to the inlet of the steam drum. The branch recovery pipelines of the annular heat exchanger and the branch recovery pipelines of the tube heat exchanger are both connected to the main steam recovery pipeline. The main steam output pipeline is equipped with a discharge valve, and the outlet of the main steam output pipeline is detachably connected to the manifold of the external heat utilization end or heat collection end through a connector.

[0013] Optionally, the drive device includes a motor and a reducer, the motor and reducer are fixedly mounted on a central fixed base, the output shaft of the motor is connected to the input shaft of the reducer, and the output shaft of the reducer is fixedly connected to the mounting base.

[0014] Optionally, the multi-slag tank waste heat recovery system also includes a ring track, and the bottom of the trolley is provided with a ball-bearing sliding block that slides on the ring track.

[0015] Optionally, the outlet, branch recovery pipeline, and steam collection assembly of the annular heat exchanger are connected by a thermal expansion assembly, and the outlet, branch recovery pipeline, and steam collection assembly of the tube heat exchanger are also connected by a thermal expansion assembly.

[0016] In summary, this application includes the following beneficial technical effects: The trolleys used for heat recovery in this application can avoid the slag discharge port of the smelting furnace. That is, while recovering heat from the slag pots on the trolleys, empty slag pots from other trolleys can continue to receive copper slag discharged from the smelting furnace's slag discharge port, eliminating the need to wait for the heat recovery of one slag pot to be completed before receiving the next. This allows for simultaneous slag discharge and waste heat recovery from multiple slag pots. The piping on each trolley does not require repeated disassembly and reassembly, improving waste heat recovery efficiency and operational stability.

[0017] In this application, the mounting base, steam collection assembly, first internal input main pipe, trolley, support, annular heat exchanger, branch input pipes, and branch recovery pipes are relatively stationary. The first internal input main pipe is connected to the first external input main pipe via a rotary joint to provide the heat exchange medium. Valves can be installed on each branch input pipe to control the supply and stoppage of the heat exchange medium to the annular heat exchanger on the corresponding trolley. Steam in the steam collection assembly can be periodically discharged from a fixed location. The overall design uses a small number of rotary joints, and steam does not pass through the rotary structure, ensuring stable operation of heat exchange and steam output. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the multi-slag pot waste heat recovery system for copper slag waste heat according to an embodiment of this application; Figure 2 This is a schematic diagram showing the state of the mobile device driving the tube heat exchanger into the slag pot according to an embodiment of this application. Figure 3 This is a schematic diagram showing the state of the moving device driving the tube heat exchanger out of the slag pot according to an embodiment of this application.

[0020] Explanation of reference numerals in the attached drawings: 1. Central fixed base; 2. Mounting seat; 3. Trolley; 4. Moving device; 41. Horizontal drive assembly; 42. Mounting frame; 43. Lifting assembly; 5. Annular heat exchanger; 6. Tube heat exchanger; 7. Annular track. Detailed Implementation

[0021] The embodiments of this application will now be described in detail with reference to the accompanying drawings.

[0022] The following specific examples illustrate the implementation of this application. Those skilled in the art can easily understand other advantages and effects of this application from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. This application can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this application. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0023] It should be noted that various aspects of embodiments within the scope of the appended claims are described below. It will be apparent that the aspects described herein can be embodied in a wide variety of forms, and any particular structure and / or function described herein is merely illustrative. Based on this application, those skilled in the art will understand that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number of aspects set forth herein can be used to implement the device and / or practice the method. Additionally, this device and / or method can be implemented using structures and / or functionalities other than one or more of the aspects set forth herein.

[0024] It should also be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this application. The illustrations only show the components related to this application and are not drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0025] Furthermore, specific details are provided in the following description to facilitate a thorough understanding of the examples. However, those skilled in the art will understand that the described aspects can be practiced without these specific details.

[0026] This application provides a multi-slag pot waste heat recovery system for copper slag waste heat.

[0027] like Figures 1 to 3 As shown, a multi-slag pot waste heat recovery system for copper slag waste heat includes a central fixed base 1, a central transfer device, a drive device, and multiple trolleys 3.

[0028] The central transfer device includes a mounting base 2, a steam collection assembly, a first external input main pipe, and a first internal input main pipe. The mounting base 2 is rotatably mounted on a central fixed base 1. The steam collection assembly is fixedly mounted on the mounting base 2. The first external input main pipe is fixedly mounted on the central fixed base 1. The first internal input main pipe is connected to the first external input main pipe through a rotary joint.

[0029] Multiple trolleys 3 surround the outer periphery of the central fixed base 1. The multiple trolleys 3 are fixedly connected to the mounting base 2 via brackets. An annular heat exchanger 5 is fixed on each trolley 3. The area on each trolley 3 corresponding to the inner ring of the annular heat exchanger 5 is used to place the slag pot. The inlet of the annular heat exchanger 5 on each trolley 3 is connected to the first internal input main pipe through a branch input pipe. The outlet of the annular heat exchanger 5 on each trolley 3 is connected to the steam collection assembly through a branch recovery pipe.

[0030] The driving device described in this application is used to drive the mounting base 2 and the multiple trolleys 3 to rotate around the central fixed base 1, so that different trolleys 3 can be located in different spatial positions. When the trolley 3 is located at the slag discharge port of the smelting furnace, the empty slag pot on the trolley 3 can receive the copper slag discharged from the smelting furnace slag discharge port. When the slag pot on the trolley 3 is full, the driving device drives the trolley 3 to the next spatial position. The heat of the slag pot is recovered by providing heat exchange medium to the annular heat exchanger 5, and the cooling temperature of the slag pot can also be controlled by controlling the flow rate of the heat exchange medium. The trolley 3, which performs heat recovery, can avoid the slag discharge port of the smelting furnace. That is, when recovering heat from the slag pot on the trolley 3, the empty slag pots of other trolleys 3 can continue to receive the copper slag discharged from the smelting furnace slag discharge port, without having to wait for the heat recovery of one slag pot to be completed before the next slag pot can be received. Specifically, the completion of heat recovery can be determined based on the temperature of the slag pot or the outlet temperature of the annular heat exchanger 5. When the slag pot on a trolley has completed heat recovery, the corresponding trolley 3 can be moved to the lower part of the moving path of the crane in the plant area, and the slag pot that has completed heat recovery can be lifted out by the crane and replaced with an empty slag pot. Alternatively, it can be moved to the position of the trolley 3 corresponding to the slag pot that has completed heat recovery through a movable lifting structure, and the slag pot can be lifted out and replaced with an empty slag pot.

[0031] In this application, the mounting base 2, steam collection assembly, first internal input main pipe, trolley 3, support, annular heat exchanger 5, branch input pipes, and branch recovery pipes are relatively stationary. The first internal input main pipe is connected to the first external input main pipe via a rotary joint to provide the heat exchange medium. Valves can be installed on each branch input pipe to control the flow and stop of the heat exchange medium to the annular heat exchanger 5 on the corresponding trolley 3. Steam in the steam collection assembly can be periodically discharged from a fixed position. The overall design uses fewer rotary joints, and steam does not pass through the rotary structure, ensuring stable operation of heat exchange and steam output.

[0032] The multi-slag pot waste heat recovery system also includes a moving device 4. The trolley 3 is equipped with a tube heat exchanger 6, which is placed inside the slag pot where heat recovery is needed. The moving device 4 drives the tube heat exchanger 6 to move from outside the vertical annular area covered by the annular heat exchanger 5 to inside the slag pot. The inlets of the tube heat exchangers 6 on each trolley 3 are connected to the first internal main inlet pipe via branch input pipes, and the outlets of the tube heat exchangers 6 on each trolley 3 are connected to the steam collection assembly via branch recovery pipes. By placing the tube heat exchanger 6 onto the higher-temperature trolley 3 using the moving device 4 on the trolley 3, heat can be recovered from inside the slag pot, improving heat recovery efficiency.

[0033] The moving device 4 includes a horizontal drive assembly 41, a mounting frame 42, and a lifting assembly 43 mounted on the trolley 3. The horizontal drive assembly 41 is fixed on the trolley 3, the mounting frame 42 is mounted on the output end of the horizontal drive assembly 41, the lifting assembly 43 is mounted on the mounting frame 42, and the tube heat exchanger 6 is mounted on the output end of the lifting assembly 43. The horizontal drive assembly 41 is located outside the vertical annular area covered by the annular heat exchanger 5. The horizontal drive assembly 41 is used to drive the mounting frame 42, the lifting assembly 43, and the tube heat exchanger 6 to move between the inside and outside of the vertical annular area covered by the annular heat exchanger 5. The lifting assembly 43 is used to drive the tube heat exchanger 6 to move up and down. The horizontal drive assembly 41 is a horizontal rotation drive mechanism or a translation drive mechanism.

[0034] The entire moving device 4 is designed so that when inserting and removing the tube heat exchanger 6, it passes through the vertical annular area covered by the annular heat exchanger 5. After heat recovery is completed, the moving device 4 moves the slag pot out of the vertical annular area covered by the annular heat exchanger 5, so that the tube heat exchanger 6 and the moving device 4 do not interfere with the lifting and placement of the slag pot. In a specific embodiment, the mounting frame 42 is L-shaped. The bottom end of the vertical rod of the mounting frame 42 is mounted on the output end of the horizontal drive component 41, and the end of the horizontal rod of the mounting frame 42 is mounted on the lifting component 43. The end of the horizontal rod of the mounting frame 42 can be moved between the inside and outside of the vertical annular area covered by the annular heat exchanger 5 by a horizontal rotation drive mechanism or a translation drive mechanism. The lifting component 43 is a vertically mounted cylinder. The translation drive mechanism can be a combination of a horizontally placed cylinder and a slide rail. The output end of the horizontally placed cylinder is connected to the slider of the slide rail. The slider serves as the output end of the horizontal drive component 41. The horizontal rotation drive mechanism can be a motor, and the rotation shaft of the motor serves as the output end of the horizontal drive component 41. When the tube heat exchanger 6 needs to be removed from the slag pot, the lifting assembly 43 first raises the tube heat exchanger 6 so that the height of the lifting assembly 43 and the tube heat exchanger 6 is higher than that of the annular heat exchanger 5. Then, the horizontal drive assembly 41 drives the mounting frame 42 to move or rotate, so that the crossbar of the mounting frame 42, the lifting assembly 43 and the tube heat exchanger 6 are removed from the vertical annular area covered by the annular heat exchanger 5.

[0035] The central transfer device also includes a second external input main pipe and a second internal input main pipe. The second external input main pipe is fixed on the central fixed base 1 and is connected to the second internal input main pipe via a rotary joint. A single branch input pipe of the annular heat exchanger 5 and the tube heat exchanger 6 is simultaneously connected to the first internal input main pipe and the second internal input main pipe via a tee joint and a connecting pipe. Input control valves are provided on the connecting pipes corresponding to the first and second internal input main pipes. The first and second external input main pipes are connected to different heat exchange medium sources. This application allows different heat exchange media to be introduced into the annular heat exchanger 5 and the tube heat exchanger 6 through the first internal input main pipe and the second internal output main pipe, depending on the temperature of the copper slag in the slag pot. For example, the first external input main pipe can be connected to a water source, and the second external input main pipe can be connected to steam or air. When the temperature of the copper slag in the slag pot is high, a gaseous heat exchange medium is introduced into the annular heat exchanger 5 and the tube heat exchanger 6 to avoid excessive pressure increase when the liquid heat exchange medium turns into high-temperature steam.

[0036] The driving device includes a motor and a reducer, which are fixedly mounted on a central fixed base 1. The output shaft of the motor is connected to the input shaft of the reducer, and the output shaft of the reducer is fixedly connected to the mounting base 2. The multi-slag tank waste heat recovery system also includes a circular track 7. The bottom of each trolley 3 is provided with a ball-bearing sliding block that slides on the circular track 7. Each trolley 3 is evenly spaced around the central fixed base 1 in the circumferential direction. In other embodiments, rollers that cooperate with the circular track 7 can also be provided at the bottom of the trolley 3 to facilitate the rotation of the trolley 3.

[0037] The outlet, branch recovery pipeline, and steam collection assembly of the annular heat exchanger 5 are connected by a thermal expansion assembly, as are the outlet, branch recovery pipeline, and steam collection assembly of the tube heat exchanger 6. This provides buffer space for the deformation of each pipeline due to thermal expansion and cooling contraction, ensuring the sealing of each pipeline.

[0038] The steam collection assembly includes a steam drum, a main steam output pipeline, and a main steam recovery pipeline. The main steam output pipeline is connected to the outlet of the steam drum, and the main steam recovery pipeline is connected to the inlet of the steam drum. Branch recovery pipelines of the annular heat exchanger 5 and the branch recovery pipelines of the tube heat exchanger 6 are both connected to the main steam recovery pipeline. The main steam output pipeline is equipped with a discharge valve. The outlet of the main steam output pipeline is detachably connected to the manifold of the external heat utilization end or heat collection end via a connector, facilitating targeted steam discharge. After discharge, the connection between the main steam output pipeline and the external environment must be disconnected. When the drive trolley 3 moves, the connection between the main steam output pipeline and the external environment must be ensured. The connector is a flange.

[0039] The driving device described in this application drives the trolley 3 to rotate intermittently along a first direction at a fixed distance. The slag discharge port of the smelting furnace is located above the movement path of the trolley 3. The corresponding position of the slag discharge port of the smelting furnace is defined as the slag discharge station. The slag pot on the trolley 3 of the slag discharge station is used to receive the copper slag discharged from the smelting furnace.

[0040] The multi-slag pot waste heat recovery system also includes a control module, a positioning detection unit and an identification unit located at the slag discharge station. Each of the trolleys 3 is equipped with an identification code that is read by the identification unit and has the trolley 3 number information. The trolley 3 is equipped with a slag pot seating detection unit and a weighing sensor. The slag pot seating detection unit is used to detect whether the slag pot on the trolley 3 is in position. In one embodiment, the positioning detection unit is an infrared sensor, which determines whether the trolley 3 is in position by detecting whether the fixed marker structure on the trolley 3 is located in the path of the infrared light from the infrared sensor. The slag pot seating detection unit is a combination of multiple infrared sensors, which determines whether the slag pot is in position by detecting whether the fixed marker structure at different positions on the slag pot is located in the path of the infrared light from the infrared sensor. The identification unit is an image sensor, and the identification code can be a number or a QR code. Each trolley 3 is equipped with a unique identification code, and the trolley number is identified by reading the information of the identification code through the image sensor. Among these, the positioning detection unit and the slag pot seating detection unit required by this application are existing mature technologies, and the identification of specific object information through image sensors and identification codes are also existing mature technologies. Here, only the principle is explained, and the specific implementation is not described in detail.

[0041] The control module is communicatively connected to the slag discharge system of the smelting furnace. The control module is electrically connected to the drive device, the positioning detection unit, the slag pot seating detection unit, the weighing sensor, and the identification unit. The control module determines whether the slag pot is empty based on the value output by the weighing sensor. If the value output by the weighing sensor is less than the threshold, it means that the slag pot on the trolley 3 is empty. The information and relative position of each trolley 3 are pre-entered into the control module. After obtaining the information of the trolley 3 at the slag discharge station, the spatial position of other trolley 3 can be determined.

[0042] The control module is configured to: when the slag pot on the trolley 3 is detected by the slag pot positioning detection unit and is determined to be in position or empty, change the status of the corresponding trolley 3 to standby; when the smelting furnace is scheduled to discharge slag, according to the trolley 3 number at the current slag discharge station and the relative position of each trolley 3, control the drive device to rotate a trolley 3 in standby mode to the slag discharge station; when the identification unit at the slag discharge station identifies the trolley 3 in standby mode and the positioning detection unit outputs that the trolley 3 is in position, change the status of the corresponding trolley 3 to empty pot ready-to-load mode and output slag discharge permission to the smelting furnace's slag discharge system; when the smelting furnace's slag discharge system starts discharging slag, change the status of the corresponding trolley 3 to slag receiving mode; after the smelting furnace's slag discharge system completes slag discharge, control the drive device to rotate a fixed distance; subsequently, heat exchange medium can be introduced into the annular heat exchanger 5 and the tube heat exchanger 6 according to the copper slag temperature and specific process requirements.

[0043] The trolley 3 is equipped with a slag pot wall temperature detection unit and a copper slag temperature detection unit inside the slag pot. The slag pot wall temperature detection unit is fixed on the annular heat exchanger 5. The probe of the copper slag temperature detection unit inside the slag pot is located inside the slag pot. The branch recovery pipeline is equipped with a medium temperature detection unit and a pressure detection unit. The input control valve is a solenoid valve. The control module is electrically connected to the position detection unit, the slag pot wall temperature detection unit, the copper slag temperature detection unit inside the slag pot, the medium temperature detection unit, the pressure detection unit, the input control valve, and the moving device 4.

[0044] The control module is configured to: open the input control valve between the annular heat exchanger 5 and the first internal input main pipe and open the input control valve between the annular heat exchanger 5 and the second internal input main pipe according to preset rules, and modify the state of the corresponding trolley 3 to waste heat recovery state or temperature control cooling state; open the input control valve between the tube heat exchanger 6 and the first internal input main pipe and open the input control valve between the tube heat exchanger 6 and the second internal input main pipe according to preset rules, and modify the state of the corresponding trolley 3 to waste heat recovery state or temperature control cooling state; wherein, the preset rules include judging the values ​​detected by the slag pot wall temperature detection unit, the copper slag temperature detection unit in the slag pot, the medium temperature detection unit and the pressure detection unit in the branch recovery pipeline. In one embodiment, the specific rule is as follows: when the temperature of the slag tank wall is less than or equal to the set threshold, the control valve between the annular heat exchanger 5 and the first internal input main pipe is opened, and the control valve between the annular heat exchanger 5 and the second internal input main pipe is closed; when the temperature of the slag tank wall is greater than the set threshold, the control valve between the annular heat exchanger 5 and the first internal input main pipe is closed, and the control valve between the annular heat exchanger 5 and the second internal input main pipe is opened. According to process requirements, if it is necessary to control the cooling rate of the copper slag in the slag pot, such as when accelerated cooling is required, the tube heat exchanger 6 can be placed in the slag pot. When the temperature of the copper slag in the slag pot is less than or equal to the set threshold, the control valve between the tube heat exchanger 6 and the first internal input main pipe is opened, and the control valve between the tube heat exchanger 6 and the second internal input main pipe is closed. When the temperature of the copper slag in the slag pot is greater than the set threshold, the control valve between the tube heat exchanger 6 and the first internal input main pipe is closed, and the control valve between the tube heat exchanger 6 and the second internal input main pipe is opened. According to process requirements, the control module sends a command to the moving device 4 on a certain trolley 3 to place the tube heat exchanger 6 into the slag pot, and the moving device 4 completes the action of placing the tube heat exchanger 6.

[0045] The control module is also configured to: close the input control valve corresponding to the annular heat exchanger 5 on the corresponding trolley 3 when the temperature value detected by the slag pot wall temperature detection unit drops to the first preset temperature value; close the input control valve corresponding to the tube heat exchanger (6) on the corresponding trolley 3 when the temperature value detected by the copper slag temperature detection unit in the slag pot drops to the second preset temperature value; control the drive device to move the tube heat exchanger 6 out of the vertical annular area covered by the annular heat exchanger 5 when the temperature value detected by the slag pot wall temperature detection unit drops to the first preset temperature value, the temperature value detected by the copper slag temperature detection unit in the slag pot drops to the second preset temperature value, and the input control valves are all closed; and close all control valves corresponding to the corresponding trolley 3 when the medium temperature detection unit and the pressure detection unit exceed the preset safety range to ensure the safe operation of the system. If a crane is used for slag removal, when a certain trolley 3 is in slag removal mode and the slag discharge station is not in slag discharge mode, the control module drives the trolley 3 in slag removal mode to move to the slag discharge station via the drive device. The slag discharge station is located below the crane's movement path within the plant area. The determination of whether trolley 3 is in the slag discharge station is made by checking whether the trolley 3 in the slag discharge station is in position and by checking the trolley 3 number in the slag discharge station. When the trolley 3 in slag removal mode is in the slag discharge station, the moving device 4 is first controlled to move the tube heat exchanger 6 out of the vertical annular area covered by the annular heat exchanger 5, and then... The slag container is lifted out of the slag container by a crane and an empty slag container is placed in it. The process of slag removal and container replacement can be carried out manually or automatically by the control module communicating with the mobile device 4 and the crane control system. Automatic operation requires the configuration of position monitoring units for each moving part of the mobile device 4 and the crane position monitoring unit. The control module determines whether the tube heat exchanger 6 has been removed and whether the crane has reached the correct position based on the position of each moving structure. The specific implementation is prior art. The scope of protection of this application involves the control method of slag removal and container replacement. The specific implementation details are not within the scope of protection. Therefore, the selection and distribution of the specific monitoring units will not be elaborated.

[0046] The control module is also configured to: when the copper slag temperature detected by the copper slag temperature detection unit in the slag pot is 900-970℃, control the opening of the input control valve between the annular heat exchanger and / or the tube heat exchanger and the first internal input main pipe, so as to control the cooling rate of the copper slag in the slag pot to be 5-50℃ / h.

[0047] In this application, a moving device 4, a solenoid valve and multiple sensors are designed for each trolley 3. Since the trolley 3 is a moving part relative to the external power supply or external control, a fixed cable and an electric slip ring can be designed in the central fixed base 1. The cables that connect to the various sensors, moving devices 4, solenoid valves or other electrical components on the trolley 3 are electrically connected through the electric slip ring and the fixed cable.

[0048] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A multi-slag pot waste heat recovery system for copper slag waste heat, characterized in that, It includes a central fixed base (1), a central transfer device, a drive device, and multiple trolleys (3); The central transfer device includes a mounting base (2), a steam collection assembly, a first external input main pipe, and a first internal input main pipe. The mounting base (2) is rotatably mounted on a central fixed base (1). The steam collection assembly is fixedly mounted on the mounting base (2). The first external input main pipe is fixedly mounted on the central fixed base (1). The first internal input main pipe is connected to the first external input main pipe through a rotary joint. Multiple trolleys (3) surround the outer periphery of the central fixed base (1). The multiple trolleys (3) are fixedly connected by brackets and mounting bases (2). An annular heat exchanger (5) is fixed on the trolley (3). The area on the trolley (3) corresponding to the inner ring of the annular heat exchanger (5) is used to place the slag pot. The inlet of the annular heat exchanger (5) is connected to the first internal input main pipe through a branch input pipe. The outlet of the annular heat exchanger (5) is connected to the steam collection assembly through a branch recovery pipe. The drive device is used to drive the mounting base (2) and the multiple trolleys (3) to rotate around the central fixed base (1).

2. The multi-slag pot waste heat recovery system for copper slag waste heat according to claim 1, characterized in that, The multi-slag pot waste heat recovery system also includes a mobile device (4), and the trolley (3) is also equipped with a tube heat exchanger (6). The tube heat exchanger (6) is used to be placed inside the slag pot to be heat recovered. The mobile device (4) is used to drive the tube heat exchanger (6) to move from outside the vertical annular area covered by the annular heat exchanger (5) and inside the slag pot. The inlet of the tube heat exchanger (6) is connected to the first internal input main pipe through a branch input pipe, and the outlet of the tube heat exchanger (6) is connected to the steam collection assembly through a branch recovery pipe.

3. The multi-slag pot waste heat recovery system for copper slag waste heat according to claim 2, characterized in that, The mobile device (4) includes a horizontal drive assembly (41), a mounting frame (42), and a lifting assembly (43) mounted on a trolley (3). The horizontal drive assembly (41) is fixed on the trolley (3), the mounting frame (42) is mounted on the output end of the horizontal drive assembly (41), the lifting assembly (43) is mounted on the mounting frame (42), and the tube heat exchanger (6) is mounted on the output end of the lifting assembly (43). The horizontal drive assembly (41) is located outside the vertical annular area covered by the annular heat exchanger (5). The horizontal drive assembly (41) is used to drive the mounting bracket (42), the lifting assembly (43) and the tube heat exchanger (6) to move between the inside and outside of the vertical annular area covered by the annular heat exchanger (5). The lifting assembly (43) is used to drive the tube heat exchanger (6) to move up and down. The horizontal drive component (41) is a horizontal rotation drive mechanism or a translation drive mechanism.

4. The multi-slag pot waste heat recovery system for copper slag waste heat according to claim 2, characterized in that, The central transfer device also includes a second external input main pipe and a second internal input main pipe. The second external input main pipe is fixed on the central fixed base (1). The second external input main pipe and the second internal input main pipe are connected by a rotary joint. The branch input pipelines of the annular heat exchanger (5) and the tube heat exchanger (6) are connected to the first internal input main pipeline and the second internal input main pipeline simultaneously through a tee joint and a connecting pipe, and an input control valve is provided on the connecting pipe corresponding to the first internal input main pipeline and the second internal input main pipeline. The first external input main pipe and the second external input main pipe are connected to different heat exchange medium sources.

5. The multi-slag pot waste heat recovery system for copper slag waste heat according to claim 4, characterized in that, The driving device drives the trolley (3) to rotate intermittently along the first direction at a fixed distance. The slag discharge port of the smelting furnace is located above the movement path of the trolley (3). The corresponding position of the slag discharge port of the smelting furnace is defined as the slag discharge station. The slag pot on the trolley (3) of the slag discharge station is used to receive the copper slag discharged from the smelting furnace. The multi-slag pot waste heat recovery system also includes a control module, an arrival detection unit and an identification unit located at the slag discharge station. Each of the trolleys (3) is equipped with an identification code that is read by the identification unit and has the trolley (3) number information. The trolley (3) is equipped with a slag pot sitting detection unit and a weighing sensor. The slag pot sitting detection unit is used to detect whether the slag pot on the trolley (3) is in place. The control module is communicatively connected to the slag discharge system of the smelting furnace. The control module is electrically connected to the drive device, the positioning detection unit, the slag pot seating detection unit, the weighing sensor, and the identification unit. The control module determines whether the slag pot is empty based on the value output by the weighing sensor. The control module is configured to: when the slag pot on the trolley (3) is detected by the slag pot positioning detection unit and is determined to be in position and empty, the status of the corresponding trolley (3) is changed to standby status; when the smelting furnace is expected to discharge slag, according to the trolley (3) number of the current slag discharge station and the relative position of each trolley (3), the control drive device is controlled to rotate a trolley (3) in standby status to the slag discharge station; when the identification unit of the slag discharge station identifies the trolley (3) in standby status and the positioning detection unit outputs that the trolley (3) is in position, the status of the corresponding trolley (3) is changed to empty pot waiting status and slag discharge permission is output to the smelting furnace slag discharge system; when the smelting furnace slag discharge system starts to discharge slag, the status of the corresponding trolley (3) is changed to slag receiving status; when the smelting furnace slag discharge system completes slag discharge, the control drive device is controlled to rotate a fixed distance.

6. The multi-slag pot waste heat recovery system for copper slag waste heat according to claim 5, characterized in that, The trolley (3) is equipped with a slag pot wall temperature detection unit and a copper slag temperature detection unit inside the slag pot. The branch recovery pipeline is equipped with a medium temperature detection unit and a pressure detection unit. The input control valve is a solenoid valve. The control module is electrically connected to the position detection unit, the slag pot wall temperature detection unit, the copper slag temperature detection unit inside the slag pot, the medium temperature detection unit, the pressure detection unit, the input control valve, and the moving device (4). The control module is configured to: control the input control valve between the annular heat exchanger (5) and the first internal input main pipe to open according to preset rules, and control the input control valve between the annular heat exchanger (5) and the second internal input main pipe to open, and modify the state of the corresponding trolley (3) to waste heat recovery state or temperature control cooling state; control the input control valve between the tube heat exchanger (6) and the first internal input main pipe to open according to preset rules, and control the input control valve between the tube heat exchanger (6) and the second internal input main pipe to open, and modify the state of the corresponding trolley (3) to waste heat recovery state or temperature control cooling state; wherein, the preset rules include judging the values ​​detected by the slag pot wall temperature detection unit, the copper slag temperature detection unit in the slag pot, the medium temperature detection unit and the pressure detection unit in the branch recovery pipeline; when the slag When the temperature value detected by the tank wall temperature detection unit drops to the first preset temperature value, the input control valve corresponding to the annular heat exchanger (5) on the corresponding trolley (3) is closed; when the temperature value detected by the copper slag temperature detection unit in the slag tank drops to the second preset temperature value, the input control valve corresponding to the tube heat exchanger (6) on the corresponding trolley (3) is closed; when the temperature value detected by the slag tank wall temperature detection unit drops to the first preset temperature value, the temperature value detected by the copper slag temperature detection unit in the slag tank drops to the second preset temperature value, and the input control valves are all closed, the drive device is controlled to move the tube heat exchanger (6) out of the vertical annular area covered by the annular heat exchanger (5), and the state of the corresponding trolley (3) is changed to the slag discharge state; when the medium temperature detection unit and the pressure detection unit exceed the preset safety range, all control valves corresponding to the corresponding trolley (3) are closed; The control module is also configured to: when the copper slag temperature detected by the copper slag temperature detection unit in the slag pot is 900-970℃, control the opening of the input control valve between the annular heat exchanger and / or the tube heat exchanger and the first internal input main pipe, so as to control the cooling rate of the copper slag in the slag pot to be 5-50℃ / h.

7. The multi-slag pot waste heat recovery system for copper slag waste heat according to claim 4, characterized in that, The steam collection assembly includes a steam drum, a main steam output pipeline, and a main steam recovery pipeline. The main steam output pipeline is connected to the outlet of the steam drum, and the main steam recovery pipeline is connected to the inlet of the steam drum. The branch recovery pipelines of the annular heat exchanger (5) and the branch recovery pipelines of the tube heat exchanger (6) are both connected to the main steam recovery pipeline. The main steam output pipeline is equipped with a discharge valve, and the outlet of the main steam output pipeline is detachably connected to the manifold of the external heat utilization end or heat collection end through a connector.

8. The multi-slag pot waste heat recovery system for copper slag waste heat according to claim 1, characterized in that, The drive device includes a motor and a reducer, which are fixedly mounted on a central fixed base (1). The output shaft of the motor is connected to the input shaft of the reducer, and the output shaft of the reducer is fixedly connected to the mounting base (2).

9. The multi-slag pot waste heat recovery system for copper slag waste heat according to claim 1, characterized in that, The multi-slag tank waste heat recovery system also includes a ring track (7), and the bottom of the trolley (3) is provided with a ball bearing sliding block that slides on the ring track (7).

10. The multi-slag pot waste heat recovery system for copper slag waste heat according to claim 2, characterized in that, The outlet, branch recovery pipeline and steam collection assembly of the annular heat exchanger (5) are connected by a thermal expansion assembly, and the outlet, branch recovery pipeline and steam collection assembly of the tube heat exchanger (6) are connected by a thermal expansion assembly.

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