CN211040914U - Liquid metallurgical sediment waste heat recovery device and waste heat recovery system - Google Patents
Liquid metallurgical sediment waste heat recovery device and waste heat recovery system Download PDFInfo
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- CN211040914U CN211040914U CN201920878047.6U CN201920878047U CN211040914U CN 211040914 U CN211040914 U CN 211040914U CN 201920878047 U CN201920878047 U CN 201920878047U CN 211040914 U CN211040914 U CN 211040914U
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Abstract
The utility model relates to a liquid metallurgical slag waste heat recovery device and a waste heat recovery system, wherein the liquid metallurgical slag waste heat recovery device comprises a heat exchange box body; an inlet through which the liquid metallurgical slag can flow into the heat exchange box body is arranged on the heat exchange box body; a first heat exchange tube group for absorbing heat of the liquid metallurgical slag is arranged in the heat exchange box body; the bottom surface of the heat exchange box body is provided with a discharge outlet, and a quick opening door capable of controlling the discharge outlet to be opened or closed is arranged on the discharge outlet; the heat exchange box body is also provided with a material ejecting component for decomposing and pushing semi-solid metallurgical slag formed by the heat exchange of the ultra-high temperature liquid metallurgical slag; the material ejecting assembly comprises a plurality of power ejector rods and a first driving device for driving the power ejector rods to move towards the discharge opening; the waste heat recovery system comprises the liquid metallurgical slag waste heat recovery device, the liquid metallurgical slag waste heat is fully utilized through multi-stage comprehensive utilization of the liquid metallurgical slag, the heat energy utilization efficiency is greatly improved, and energy conservation and emission reduction are achieved to the greatest extent.
Description
Technical Field
The utility model relates to a metallurgical sediment waste heat recovery utilizes the field, in particular to liquid metallurgical sediment waste heat recovery device and waste heat recovery system.
Background
In the metallurgical industry, metallurgical slag generated during metallurgy is often treated, and in order to improve utilization of the metallurgical slag, waste heat of the metallurgical slag is often recycled.
Because the liquid metallurgical sediment liquid state that metallurgical production was metallurgical has the temperature height, the complicated scheduling problem of composition, if direct heat transfer utilization, because the temperature variation span is big, the heat transfer system impact frequency who carries out the heat transfer utilization to it is too big, and equipment damages easily. Therefore, at present, no equipment for directly exchanging heat and utilizing the metallurgical slag exists.
The traditional method for recovering the waste heat of the metallurgical slag comprises the steps of firstly cooling and solidifying the metallurgical slag, then manufacturing high-temperature solid particles through a granulator, and then recovering the waste heat of the high-temperature solid particles by using a heat exchange system.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a liquid metallurgical sediment waste heat recovery device, the device can be directly to the liquid metallurgical sediment directly carry out the heat energy absorption utilization.
Realize the utility model discloses the technical scheme of first purpose is: the utility model discloses a waste heat recovery device for medium-liquid metallurgical slag, which comprises a heat exchange box body; an inlet through which the ultra-hot high-temperature liquid metallurgical slag can flow into the heat exchange box body is formed in the heat exchange box body; a heat exchange assembly for absorbing heat of the liquid metallurgical slag is arranged in the heat exchange box body; the bottom surface of the heat exchange box body is provided with a discharge outlet, and a quick opening door capable of controlling the discharge outlet to be opened or closed is arranged on the discharge outlet;
the heat exchange box body is also provided with a material ejecting component; the material ejecting assembly comprises a plurality of power ejector rods and a first driving device for driving the power ejector rods to move towards the discharge opening; the power ejector rod is used for decomposing and pushing semisolid metallurgical slag formed by heat exchange of the liquid metallurgical slag; the power ejector rod is positioned in a gap formed by the heat exchange assembly and the inner space of the heat exchange box body.
The quick opening door is also provided with a decomposition component; the decomposing assembly comprises a plurality of decomposing ejector rods and a second driving device for driving the decomposing ejector rods to move upwards; one end of the decomposition ejector rod, which is positioned in the heat exchange box body, is a decomposition head capable of decomposing the semi-solid metallurgical slag.
The heat exchange component is a tubular heat exchanger and/or a plate heat exchanger.
The top cover of the heat exchange box body is provided with an exhaust port which can be connected with a gas collecting device.
The top cover of the heat exchange box body is provided with an explosion-proof opening.
And a cooling pipe group is embedded in the part of the heat exchange box body which is not provided with the heat exchange assembly.
As an optimized design, heat exchange assemblies are also arranged in the heat exchange box body and on the peripheral side walls of the heat exchange box body; a first cooling pipe group is arranged in the quick opening door; the inlet and the outlet of the first cooling pipe group extend out of the interior of the quick-opening door;
a second cooling pipe group is buried in the top cover of the heat exchange box body, and an inlet and an outlet of the second cooling pipe group extend out of the top cover.
A preheating device for heating is arranged in the heat exchange box body.
The preheating device comprises a pipeline which is communicated with the inside of the heat exchange box body and can introduce hot gas or steam into the heat exchange box body.
The second purpose of the utility model is to provide a waste heat recovery system, this waste heat recovery system can form multistage utilization to liquid metallurgical sediment, improves waste heat recovery efficiency greatly.
Realize the utility model discloses the technical scheme of second purpose is: the utility model discloses a middle waste heat recovery system, which comprises at least one liquid metallurgical slag waste heat recovery device, a first molten salt tank, a first molten salt pump and a heat energy application unit; the heat exchange medium in the heat exchange assembly in the liquid metallurgical slag waste heat recovery device is molten salt; the first molten salt tank is provided with a molten salt inlet and a molten salt outlet; the thermal energy application unit comprises a thermal energy utilization pipeline through which the molten salt can pass and from which thermal energy can be extracted;
the outlet end of the first molten salt pump is communicated with the heat exchange medium inlet of the heat exchange assembly, molten salt is input into the heat exchange assembly by the first molten salt pump, and the heat exchange medium outlet of the heat exchange assembly is connected with the molten salt inlet of the first molten salt tank; and a fused salt outlet of the first fused salt tank is connected with an inlet of the heat energy utilization pipeline.
Meanwhile, the device also comprises a first buffer tank; an outlet of the first buffer tank is connected with an inlet end of a first molten salt pump, an outlet end of the first molten salt pump is communicated with a heat exchange medium inlet of the heat exchange assembly, and a heat exchange medium outlet of the heat exchange assembly is respectively connected with a molten salt inlet of the first molten salt tank and a first inlet of the first buffer tank; the fused salt outlet of the first fused salt tank is connected with the inlet of the heat energy utilization pipeline, and the outlet of the heat energy utilization pipeline is connected with the second inlet of the first buffer tank.
Meanwhile, the device also comprises a second molten salt tank; the outlet of the heat exchange medium of the heat exchange assembly is also connected with the molten salt inlet of the second molten salt tank, and the molten salt outlet of the second molten salt tank is connected with the molten salt inlet of the first molten salt tank and/or the inlet of the heat energy utilization pipeline and/or the third inlet of the first buffer tank.
The device also comprises a first conveying mechanism, a solid metallurgical slag granulator, a second conveying mechanism and at least one high-temperature solid particle heat exchange device;
the high-temperature solid particle heat exchange device comprises a storage body; the storage body is provided with a material inlet, a material outlet, a gas inlet, a gas outlet and a fan; the air outlet of the fan is connected with the air inlet, and the air outlet is connected with the heat energy application unit;
a discharge port of the heat exchange box body corresponds to a feed port of the solid metallurgical slag granulator through a first conveying mechanism, and semi-solid metallurgical slag discharged from the discharge port of the heat exchange box body is conveyed into the feed port of the solid metallurgical slag granulator through the first conveying mechanism;
the discharge port of the solid-state metallurgical slag granulator corresponds to the material inlet on the storage body through the second conveying mechanism, and metallurgical slag particles discharged from the discharge port of the solid-state metallurgical slag granulator are conveyed into the material inlet of the storage body through the second conveying mechanism.
The device also comprises at least one gas-liquid heat exchange device and a second buffer tank; the gas-liquid heat exchange device comprises a heat exchange cavity; a first heat exchange tube group is arranged in the heat exchanger cavity; the heat exchange medium in the first heat exchange tube group is molten salt; the heat exchange cavity is provided with an air inlet and an air outlet; the gas inlet of the heat exchange cavity is connected with the gas outlet of the high-temperature solid particle heat exchange device; the heat energy application unit also comprises a high-temperature gas circulation pipe which can draw heat energy; the outlet of the heat exchange cavity is connected with the inlet of a high-temperature gas circulating pipe, and the outlet of the high-temperature gas circulating pipe is connected with the air inlet of the fan;
the outlet of the first heat exchange pipe set is connected with the first inlet of the second buffer tank and/or the molten salt inlet of the first molten salt tank respectively, the outlet of the second buffer tank is connected with the inlet of the second molten salt pump, and the outlet of the second molten salt pump is connected with the inlet of the first heat exchange pipe set.
As an optimized design, the fused salt outlet of the second fused salt tank is connected with the fused salt inlet of the first fused salt tank and/or the inlet of the heat energy utilization pipeline and/or the third inlet of the first buffer tank and/or the second inlet of the second buffer tank.
The heat energy application unit comprises a steam generating device; the steam generating device comprises a water tank, a deaerator, a heat energy utilization pipeline and an evaporator; the high-temperature gas circulation pipe passes through the inside of the water tank and heats water in the water tank; the heat energy utilization pipeline passes through the evaporator and provides heat energy for the evaporator; the water tank is connected with an inlet of a deaerator through a water feeding pump, and an outlet of the deaerator is connected with a liquid inlet of the evaporator; and a steam outlet of the evaporator is respectively connected with an input end of the heat supply network and a steam inlet of the deaerator.
The steam generating device also comprises a superheater; the heat energy utilization pipeline passes through the superheater and provides heat energy for the superheater; and a steam outlet of the evaporator is also connected with a steam inlet of the superheater, and a steam outlet of the superheater is connected with an input end of the heat supply network.
The steam generating device also comprises a preheater; the heat energy utilization pipeline passes through the preheater and provides heat energy for the preheater; and a steam outlet of the evaporator is connected with an inlet of the preheater, and an outlet of the preheater is connected with an input end of the heat supply network.
The steam generating device also comprises a continuous blowdown tank and a periodic blowdown tank; the evaporator is provided with a continuous sewage draining pipe and a periodic sewage draining pipe; the continuous sewage discharge pipe is connected with an inlet of the continuous sewage discharge tank, an outlet of the continuous sewage discharge tank is connected with a first inlet of the periodic sewage discharge tank, and the periodic sewage discharge pipe is connected with a second inlet of the periodic sewage discharge tank; and a drain outlet is arranged on the periodic sewage draining tank.
The heat energy application unit also comprises a steam turbine set driven by steam; the steam turbine set is provided with a steam inlet and a condensed water outlet; and a steam outlet of the superheater is connected with a steam inlet of the steam turbine set.
The first conveying mechanism comprises a track, and a transport vehicle which is provided with a driving device and can move along the track under the driving of the driving device is arranged on the track; the transport vehicle comprises a vehicle body; the upper end of the vehicle body is provided with a material receiving port, and the bottom of the vehicle body is provided with a discharge port with a gate; the material receiving port of the vehicle body can be correspondingly matched with the discharge port of the heat exchange box body to receive materials, and the discharge port of the vehicle body can be correspondingly matched with the feed port of the solid metallurgical slag granulator to discharge materials.
The second conveying mechanism comprises a steel slag transport vehicle which can receive high-temperature metallurgical slag particles discharged from a discharge hole of the solid-state metallurgical slag granulator and a lifting platform device; the lifting platform device comprises a lifting frame; the lifting frame is provided with a lifting rail, a lifting platform is arranged on the lifting rail in a sliding mode, and the lifting platform enables the lifting platform to lift between a low position and a high position of the lifting frame along the lifting rail through a lifting driving device; a channel for driving the steel slag transport vehicle to the lifting platform is arranged at the lower position of the lifting frame; the high position of the lifting frame is provided with a discharging position for the steel slag transport vehicle to discharge to the material inlet of the high-temperature solid particle heat exchange device.
Meanwhile, a third conveying mechanism is also arranged; the third conveying mechanism can receive a conveying belt or a slag conveying vehicle for waste slag discharged from a material outlet of the high-temperature solid particle heat exchange device.
The inlet of the first cooling pipe group and the inlet of the second cooling pipe group are both connected with the outlet of the cold water tank, and the inlet of the cold water tank is connected with the condensed water outlet of the steam turbine unit through a water return pipeline; the outlet of the first cooling pipe group and the outlet of the second cooling pipe group are both connected with the inlet of the water tank of the steam generating device.
The utility model discloses has positive effect: (1) the utility model discloses well liquid metallurgical sediment waste heat recovery device can directly carry out the direct recycle of waste heat to liquid metallurgical sediment, has solved the problem that liquid metallurgical sediment can't directly carry out heat transfer utilization.
(2) The utility model discloses well liquid metallurgical sediment waste heat recovery device can decompose and promote the semi-solid-state metallurgical sediment that forms after the heat transfer by liquid metallurgical sediment through the liftout subassembly to be favorable to discharging smoothly the bin outlet of heat transfer box body with solid-state sediment and semi-solid-state metallurgical sediment in the heat transfer box.
(3) The liquid metallurgical slag waste heat recovery device can decompose the semi-solid metallurgical slag in the heat exchange box through the decomposition component, and can further ensure the smooth discharge of the semi-solid metallurgical slag after being matched with the ejection component;
(4) the liquid metallurgical slag waste heat recovery device of the utility model is beneficial to the discharge and post treatment of harmful gas through the exhaust port;
(5) the waste heat recovery device for the medium-liquid metallurgical slag can effectively improve the safety of the waste heat recovery device through the explosion-proof port;
(6) the utility model reduces the damage of liquid metallurgical slag to the heat exchange box body through the first cooling pipe group and the second cooling pipe group, and ensures the smooth proceeding of waste heat recovery;
(7) the waste heat recovery device for the liquid metallurgical slag can reduce the temperature span, reduce the impact frequency of the liquid metallurgical slag, further improve the use safety and provide possibility for directly recovering the waste heat of the liquid metallurgical slag through the preheating device;
(8) the waste heat recovery system in the utility model can directly recover the waste heat of the metallurgical slag from the liquid state, and the efficiency of waste heat recovery is higher;
(9) the utility model discloses well waste heat recovery system can accomplish maximum waste heat recovery to metallurgical sediment through the waste heat recovery of multiform.
Drawings
In order that the present invention may be more readily and clearly understood, the following detailed description of the present invention is given in conjunction with the accompanying drawings, in which
FIG. 1 is a schematic structural view of a device for recovering the residual heat of the medium-liquid metallurgical slag according to the present invention;
FIG. 2 is an internal cross-sectional view of the device for recovering the residual heat of the medium-liquid metallurgical slag of the present invention;
FIG. 3 is a schematic connection diagram of the waste heat recovery system of the present invention;
FIG. 4 is a schematic view of the connection structure of the steam generator of the present invention;
FIG. 5 is a schematic structural view of a solid metallurgical slag granulator according to the present invention;
FIG. 6 is a schematic structural view of a medium-high temperature solid particle heat exchange device according to the present invention;
FIG. 7 is a schematic view of the connection of the medium-high temperature solid particle heat exchanger, the gas-liquid heat exchanger and the water tank of the present invention;
fig. 8 is a schematic structural view of a transport vehicle in the first conveying mechanism of the present invention;
fig. 9 is a schematic structural view of a second conveying mechanism in the present invention;
Detailed Description
Referring to fig. 1 to 9, the device for recovering the waste heat of the liquid metallurgical slag comprises a heat exchange box body 1; an inlet 1-1 for the ultra-hot high-temperature liquid metallurgical slag to flow into the heat exchange box body 1 is arranged on the heat exchange box body 1; a heat exchange assembly 2 for absorbing heat of the ultra-hot high-temperature liquid metallurgical slag is arranged in the heat exchange box body 1, and the heat exchange assembly 2 is also arranged in the heat exchange box body 1 and positioned on the peripheral side wall of the heat exchange box body 1; the bottom surface of the heat exchange box body 1 is provided with a discharge outlet 1-2, and the discharge outlet 1-2 is provided with a quick opening door 1-3 capable of controlling the discharge outlet 1-2 to be opened or closed;
the heat exchange box body 1 is also provided with a material ejecting assembly; the material ejecting assembly comprises a plurality of power ejector rods 3 and a first driving device for driving the power ejector rods 3 to move towards the discharge opening 1-2; the power ejector rod 3 is used for decomposing and pushing semisolid metallurgical slag formed by heat exchange of liquid metallurgical slag; and the power mandril 3 is positioned in a gap formed by the heat exchange assembly 2 and the inner space of the heat exchange box body 1.
The quick opening door 1-3 is also provided with a decomposition component; the decomposing assembly comprises a plurality of decomposing ejector rods 4 and a second driving device for driving the decomposing ejector rods 4 to move upwards; one end of the decomposition ejector rod 4 positioned in the heat exchange box body 1 is a decomposition head 4-1 capable of decomposing semi-solid metallurgical slag.
The heat exchange component 2 is a tubular heat exchanger and/or a plate heat exchanger.
The top cover 1-4 of the heat exchange box body 1 is provided with an exhaust port 1-5 which can be connected with a gas collecting device.
The top cover 1-4 of the heat exchange box body 1 is provided with an explosion-proof opening 1-6.
A cooling pipe group is embedded in the part of the heat exchange box body 1 where the heat exchange component 2 is not arranged.
A first cooling pipe group 1-7 is arranged in the quick-opening door 1-3; the inlet and the outlet of the first cooling pipe group 1-7 extend out from the inside of the quick-opening door 1-3;
the second cooling pipe groups 1-8 are embedded in the top covers 1-4 of the heat exchange box body 1, and the inlets and outlets of the second cooling pipe groups 1-8 extend out of the top covers 1-4.
A preheating device 5 for heating is arranged in the heat exchange box body 1. The preheating device 5 comprises a pipeline which is communicated with the inside of the heat exchange box body 1 and can introduce hot gas or steam into the heat exchange box body 1.
The waste heat recovery system comprises a plurality of the liquid metallurgical slag waste heat recovery devices connected in series, a first molten salt tank 6, a first molten salt pump 7 and a heat energy application unit; the heat exchange medium in the heat exchange component 2 in the liquid metallurgical slag waste heat recovery device is molten salt; the first molten salt tank 6 is provided with a molten salt inlet and a molten salt outlet; the thermal energy application unit comprises a thermal energy utilization pipeline 8 which can be used for molten salt to pass through and can be used for extracting thermal energy;
the outlet end of the first molten salt pump 7 is communicated with the heat exchange medium inlet of the heat exchange assembly 2, molten salt is input into the heat exchange assembly 2 by the first molten salt pump 7, and the heat exchange medium outlet of the heat exchange assembly 2 is connected with the molten salt inlet of the first molten salt tank 6; the fused salt outlet of the first fused salt tank 6 is connected with the inlet of the heat energy utilization pipeline 8.
Meanwhile, the device also comprises a first buffer tank 9; an outlet of the first buffer tank 9 is connected with an inlet end of a first molten salt pump 7, an outlet end of the first molten salt pump 7 is connected and communicated with a heat exchange medium inlet of the heat exchange assembly 2, and a heat exchange medium outlet of the heat exchange assembly 2 is respectively connected with a molten salt inlet of the first molten salt tank 6 and a first inlet of the first buffer tank 9; the fused salt outlet of the first fused salt tank 6 is connected with the inlet of the heat energy utilization pipeline 8, and the outlet of the heat energy utilization pipeline 8 is connected with the second inlet of the first buffer tank 9.
Meanwhile, the device also comprises a second molten salt tank 10; the outlet of the heat exchange medium of the heat exchange component 2 is also connected with the molten salt inlet of the second molten salt tank 10, and the molten salt outlet of the second molten salt tank 10 is connected with the molten salt inlet of the first molten salt tank 6 and the inlet of the heat energy utilization pipeline 8 and the third inlet of the first buffer tank 9.
Meanwhile, the device also comprises a first conveying mechanism 11, a solid metallurgical slag granulator 12, a second conveying mechanism 13 and at least one high-temperature solid particle heat exchange device 14;
the high-temperature solid particle heat exchange device 14 comprises a storage body 14-1; the storage body 14-1 is provided with a material inlet 14-2, a material outlet 14-3, a gas inlet 14-4, a gas outlet 14-5 and a fan 14-6; an air outlet of the fan 14-6 is connected with the air inlet 14-4, and an air outlet 14-5 is connected with the heat energy application unit;
a discharge opening 1-2 of the heat exchange box body 1 corresponds to a feed opening 12-1 of the solid metallurgical slag granulator 12 through a first conveying mechanism 11, and semi-solid metallurgical slag discharged from the discharge opening 1-2 of the heat exchange box body 1 is conveyed into the feed opening 12-1 of the solid metallurgical slag granulator 12 through the first conveying mechanism 11;
the discharge port 12-2 of the solid-state metallurgical slag granulator 12 corresponds to the material inlet 14-2 on the storage body 14-1 through the second conveying mechanism 13, and the metallurgical slag particles discharged from the discharge port 12-2 of the solid-state metallurgical slag granulator 12 are conveyed into the material inlet 14-2 of the storage body 14-1 through the second conveying mechanism 13.
Meanwhile, the device also comprises a plurality of gas-liquid heat exchange devices 15 and second buffer tanks 16 which are connected in series; the gas-liquid heat exchange device 15 comprises a heat exchange cavity; a first heat exchange tube group is arranged in the heat exchanger cavity; the heat exchange medium in the first heat exchange tube group is molten salt; the heat exchange cavity is provided with an air inlet and an air outlet; a dust removal filtering device is arranged between the air inlet of the heat exchange cavity and the gas outlet 14-5 of the high-temperature solid particle heat exchange device 14, namely, high-temperature gas coming out of the gas outlet of the high-temperature solid particle heat exchange device 14 is filtered by the dust removal filtering device and then is introduced into the air inlet of the heat exchange cavity; the thermal energy application unit further comprises a high temperature gas circulation pipe 17 from which thermal energy can be extracted; the air outlet of the heat exchange cavity is connected with the inlet of a high-temperature gas circulating pipe 17, and the outlet of the high-temperature gas circulating pipe 17 is connected with the air inlet of the fan 14-6;
the outlet of the first heat exchange pipe set is respectively connected with the first inlet of the second buffer tank 16 and/or the molten salt inlet of the first molten salt tank 6, the outlet of the second buffer tank 16 is connected with the inlet of the second molten salt pump 18, and the outlet of the second molten salt pump 18 is connected with the inlet of the first heat exchange pipe set.
The molten salt outlet of the second molten salt tank 10 is also connected with a second inlet of the second buffer tank 16.
The thermal energy application unit comprises a steam generating device 19; the steam generating device 19 comprises a water tank 19-1, a deaerator 19-2 and an evaporator 19-3; the high-temperature gas circulation pipe 17 passes through the inside of the water tank 19-1 and heats water in the water tank 19-1; the heat energy utilization pipeline 8 passes through the evaporator 19-3 and provides heat energy for the evaporator 19-3; the water tank 19-1 is connected with an inlet of the deaerator 19-2 through a water feed pump, and an outlet of the deaerator 19-2 is connected with a liquid inlet of the evaporator 19-3; and a steam outlet of the evaporator 19-3 is respectively connected with an input end of a heat supply network and a steam inlet of the deaerator 19-2.
The steam generating device 19 further comprises a superheater 19-4; the heat energy utilization pipeline 8 passes through the superheater 19-4 and provides heat energy for the superheater 19-4; the steam outlet of the evaporator 19-3 is also connected with the steam inlet of the superheater 19-4, and the steam outlet of the superheater 19-4 is connected with the input end of the heat supply network.
The steam generating device 19 further comprises a preheater 19-5; the heat energy utilization pipeline 8 passes through the preheater 19-5 and provides heat energy for the preheater 19-5; the steam outlet of the evaporator 19-3 is connected with the inlet of the preheater 19-5, and the outlet of the preheater 19-5 is connected with the input end of the heat supply network.
The steam generating device 19 also comprises a continuous blowdown tank 19-6 and a periodic blowdown tank 19-7; the evaporator 19-3 is provided with a continuous sewage draining pipe and a periodic sewage draining pipe; the continuous sewage discharge pipe is connected with an inlet of the continuous sewage discharge tank 19-6, an outlet of the continuous sewage discharge tank 19-6 is connected with a first inlet of the periodic sewage discharge tank 19-7, and the periodic sewage discharge pipe is connected with a second inlet of the periodic sewage discharge tank 19-7; and a drain outlet is arranged on the periodic sewage draining tank 19-7.
The thermal energy application unit further comprises a steam turbine group 20 driven by steam; the steam turbine set 20 is provided with a steam inlet and a condensed water outlet; the steam outlet of the superheater 19-4 is connected with the steam inlet of the steam turbine set 20.
The first conveying mechanism 11 comprises a track, and a transport vehicle 11-1 which is provided with a driving device and can travel along the track under the driving of the driving device is arranged on the track; the transport vehicle 11-1 comprises a vehicle body; the upper end of the car body is provided with a material receiving port 11-2, and the bottom of the car body is provided with a discharge port 11-3 with a gate; the material receiving opening 11-2 of the vehicle body can be correspondingly matched with the material discharging opening 1-2 of the heat exchange box body 1 to receive materials, and the material discharging opening 11-3 of the vehicle body can be correspondingly matched with the material feeding opening 12-1 of the solid metallurgical slag granulator 12 to discharge materials.
The second conveying mechanism 13 comprises a steel slag transport vehicle 13-1 which can receive high-temperature metallurgical slag particles discharged from a discharge port 12-2 of the solid-state metallurgical slag granulator 12 and a lifting platform device 13-2; the lifting platform device 13-2 comprises a lifting frame 13-2-1; the lifting frame 13-2-1 is provided with a lifting track, the lifting track is provided with a lifting platform 13-2-2 in a sliding manner, and the lifting platform 13-2-2 enables the lifting platform 13-2-2 to lift between a low position and a high position of the lifting frame 13-2-1 along the lifting track through a lifting driving device; a channel for the steel slag transport vehicle 13-1 to open onto the lifting platform 13-2-2 is arranged at the lower position of the lifting frame 13-2-1; the high position of the lifting frame 13-2-1 is provided with a discharging position for discharging the steel slag transport vehicle 13-1 to the material inlet 14-2 of the high-temperature solid particle heat exchange device 14.
A third conveying mechanism 21 is also arranged; the third conveying mechanism 21 can be a conveying belt or a slag transport vehicle for receiving the waste slag discharged from the material outlet 14-3 of the high-temperature solid particle heat exchange device 14.
The inlet of the first cooling pipe group 1-7 and the inlet of the second cooling pipe group 1-8 are both connected with the outlet of the cold water tank 22, and the inlet of the cold water tank 22 is connected with the condensed water outlet of the steam turbine unit 20 through a water return pipeline; the outlet of the first cooling tube bank 1-7 and the outlet of the second cooling tube bank 1-8 are both connected with the inlet of the water tank 19-1 of the steam generating device 19.
The utility model discloses a heat utilization principle as follows:
firstly, the heat exchange box body 1 is preheated by the preheating device 5, so that the temperature span during heat exchange is reduced, the impact frequency of liquid metallurgical slag is reduced, the use safety is improved, and the possibility of directly recovering the waste heat of the liquid metallurgical slag is provided; then pouring the liquid metallurgical slag into the heat exchange box body 1 from the inlet 1-1 of the heat exchange box body 1, wherein the quick-opening door 1-3 of the heat exchange box body 1 is closed. Then molten salt is introduced into the heat exchange component 2, the molten salt absorbs the heat of the liquid metallurgical slag in the heat exchange box body 1, and the molten salt after heat absorption is introduced into the first molten salt tank 6 and/or the second molten salt tank 10 and/or the first buffer tank 9 and/or the second buffer tank 16 for storage; after absorbing certain heat, the liquid metallurgical slag in the heat exchange box body 1 is solidified to form semi-solid metallurgical slag. At this time, the semi-solid metallurgical slag must be removed from the heat exchange box body 1 for the next heat exchange. The semi-solid metallurgical slag can be adhered to the heat exchange box body 1 and the heat exchange assembly 2, and the semi-solid metallurgical slag is decomposed, crushed and ejected through the ejection assembly and the decomposition assembly, so that the purpose of removing the semi-solid metallurgical slag is achieved. The method also provides technical support for recovering the waste heat of the liquid metallurgical slag. The stored molten salt with thermal energy can transfer the thermal energy to the thermal energy utilization unit through the thermal energy utilization pipe 8.
Wherein, each pipeline is provided with an electric control valve which is controlled by an intelligent control system. The control of the flowing direction of the fused salt is realized through intelligent control, the control of the flowing direction of the high-temperature gas in the high-temperature gas flowing pipe 17 is realized, and therefore the intelligent control of the multi-stage utilization of the heat energy is realized.
The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above-mentioned embodiments are only specific embodiments of the present invention, and are not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (24)
1. Liquid metallurgical sediment waste heat recovery device, its characterized in that: comprises a heat exchange box body (1); an inlet (1-1) for the ultra-hot high-temperature liquid metallurgical slag to flow into the heat exchange box body (1) is arranged on the heat exchange box body (1); a heat exchange assembly (2) for absorbing heat of the ultra-hot high-temperature liquid metallurgical slag is arranged in the heat exchange box body (1); a discharge outlet (1-2) is arranged on the bottom surface of the heat exchange box body (1), and a quick opening door (1-3) capable of controlling the discharge outlet (1-2) to be opened or closed is arranged on the discharge outlet (1-2);
the heat exchange box body (1) is also provided with a material ejecting assembly; the material ejecting assembly comprises a plurality of power ejector rods (3) and a first driving device for driving the power ejector rods (3) to move towards the discharge opening (1-2); the power ejector rod (3) is used for decomposing and pushing semisolid metallurgical slag formed by heat exchange of liquid metallurgical slag; the power ejector rod (3) is positioned in a gap formed by the heat exchange assembly (2) and the inner space of the heat exchange box body (1).
2. The liquid metallurgical slag waste heat recovery device of claim 1, wherein: the quick opening door (1-3) is also provided with a decomposition component; the decomposing assembly comprises a plurality of decomposing ejector rods (4) and a second driving device for driving the decomposing ejector rods (4) to move upwards; one end of the decomposition ejector rod (4) positioned in the heat exchange box body (1) is a decomposition head (4-1) capable of decomposing the semi-solid metallurgical slag.
3. The liquid metallurgical slag waste heat recovery device of claim 1, wherein: the heat exchange component (2) is a tubular heat exchanger and/or a plate heat exchanger.
4. The liquid metallurgical slag waste heat recovery device of claim 1, wherein: the top cover (1-4) of the heat exchange box body (1) is provided with an exhaust port (1-5) which can be connected with a gas collecting device.
5. The liquid metallurgical slag waste heat recovery device of claim 1, wherein: the top cover (1-4) of the heat exchange box body (1) is provided with an explosion-proof opening (1-6).
6. The liquid metallurgical slag waste heat recovery device of claim 1, wherein: the cooling pipe group is embedded in the part of the heat exchange box body (1) which is not provided with the heat exchange assembly (2).
7. The liquid metallurgical slag waste heat recovery device of claim 1, wherein: heat exchange assemblies (2) are also arranged in the heat exchange box body (1) and on the peripheral side walls of the heat exchange box body (1); a first cooling pipe group (1-7) is arranged inside the quick opening door (1-3); the inlet and the outlet of the first cooling pipe group (1-7) extend out of the interior of the quick-opening door (1-3);
a second cooling pipe group (1-8) is embedded in a top cover (1-4) of the heat exchange box body (1), and an inlet and an outlet of the second cooling pipe group (1-8) extend out of the top cover (1-4).
8. The liquid metallurgical slag waste heat recovery device of claim 1, wherein: a preheating device (5) for heating is arranged in the heat exchange box body (1).
9. The liquid metallurgical slag waste heat recovery device of claim 8, wherein: the preheating device (5) comprises a pipeline which is communicated with the inside of the heat exchange box body (1) and can introduce hot gas or steam into the heat exchange box body (1).
10. A waste heat recovery system is characterized in that: comprising at least one liquid metallurgical slag waste heat recovery device according to one of the claims 1 to 9, a first molten salt tank (6), a first molten salt pump (7) and a thermal energy application unit; the heat exchange medium in the heat exchange component (2) in the liquid metallurgical slag waste heat recovery device is molten salt; the first molten salt tank (6) is provided with a molten salt inlet and a molten salt outlet; the thermal energy application unit comprises a thermal energy utilization pipeline (8) through which the molten salt can pass and from which thermal energy can be extracted;
the outlet end of the first molten salt pump (7) is communicated with the heat exchange medium inlet of the heat exchange assembly (2), molten salt is input into the heat exchange assembly (2) by the first molten salt pump (7), and the heat exchange medium outlet of the heat exchange assembly (2) is connected with the molten salt inlet of the first molten salt tank (6); the fused salt outlet of the first fused salt tank (6) is connected with the inlet of the heat energy utilization pipeline (8).
11. A heat recovery system as claimed in claim 10, wherein: also comprises a first buffer tank (9); an outlet of the first buffer tank (9) is connected with an inlet end of a first molten salt pump (7), an outlet end of the first molten salt pump (7) is communicated with a heat exchange medium inlet of the heat exchange assembly (2), and a heat exchange medium outlet of the heat exchange assembly (2) is respectively connected with a molten salt inlet of the first molten salt tank (6) and a first inlet of the first buffer tank (9); the fused salt outlet of the first fused salt tank (6) is connected with the inlet of the heat energy utilization pipeline (8), and the outlet of the heat energy utilization pipeline (8) is connected with the second inlet of the first buffer tank (9).
12. The heat recovery system of claim 11, wherein: also comprises a second molten salt tank (10); the outlet of the heat exchange medium of the heat exchange component (2) is also connected with the molten salt inlet of the second molten salt tank (10), and the molten salt outlet of the second molten salt tank (10) is connected with the molten salt inlet of the first molten salt tank (6) and/or the inlet of the heat energy utilization pipeline (8) and/or the third inlet of the first buffer tank (9).
13. The heat recovery system of claim 10, wherein: the device also comprises a first conveying mechanism (11), a solid metallurgical slag granulator (12), a second conveying mechanism (13) and at least one high-temperature solid particle heat exchange device (14);
the high-temperature solid particle heat exchange device (14) comprises a storage body (14-1); the storage body (14-1) is provided with a material inlet (14-2), a material outlet (14-3), a gas inlet (14-4), a gas outlet (14-5) and a fan (14-6); an air outlet of the fan (14-6) is connected with the air inlet (14-4), and an air outlet (14-5) is connected with the heat energy application unit;
a discharge outlet (1-2) of the heat exchange box body (1) corresponds to a feed inlet (12-1) of the solid metallurgical slag granulator (12) through a first conveying mechanism (11), and semi-solid metallurgical slag discharged from the discharge outlet (1-2) of the heat exchange box body (1) is conveyed into the feed inlet (12-1) of the solid metallurgical slag granulator (12) through the first conveying mechanism (11);
the discharge port (12-2) of the solid-state metallurgical slag granulator (12) corresponds to the material inlet (14-2) on the storage body (14-1) through a second conveying mechanism (13), and metallurgical slag particles discharged from the discharge port (12-2) of the solid-state metallurgical slag granulator (12) are conveyed into the material inlet (14-2) of the storage body (14-1) through the second conveying mechanism (13).
14. A waste heat recovery system as claimed in claim 13, wherein: the device also comprises at least one gas-liquid heat exchange device (15) and a second buffer tank (16); the gas-liquid heat exchange device (15) comprises a heat exchange cavity; a first heat exchange tube group is arranged in the heat exchanger cavity; the heat exchange medium in the first heat exchange tube group is molten salt; the heat exchange cavity is provided with an air inlet and an air outlet; the air inlet of the heat exchange cavity is connected with the gas outlet (14-5) of the high-temperature solid particle heat exchange device (14); the thermal energy application unit further comprises a high temperature gas circulation pipe (17) from which thermal energy can be extracted; the air outlet of the heat exchange cavity is connected with the inlet of a high-temperature gas circulating pipe (17), and the outlet of the high-temperature gas circulating pipe (17) is connected with the air inlet of a fan (14-6);
the outlet of the first heat exchange pipe set is connected with the first inlet of the second buffer tank (16) and/or the molten salt inlet of the first molten salt tank (6) respectively, the outlet of the second buffer tank (16) is connected with the inlet of the second molten salt pump (18), and the outlet of the second molten salt pump (18) is connected with the inlet of the first heat exchange pipe set.
15. A waste heat recovery system as defined in claim 14, wherein: also comprises a second molten salt tank (10); the outlet of the heat exchange medium of the heat exchange assembly (2) is also connected with the molten salt inlet of the second molten salt tank (10), and the molten salt outlet of the second molten salt tank (10) is connected with the molten salt inlet of the first molten salt tank (6) and/or the inlet of the heat energy utilization pipeline (8) and/or the third inlet of the first buffer tank (9) and/or the second inlet of the second buffer tank (16).
16. A waste heat recovery system as defined in claim 14, wherein: the thermal energy application unit comprises a steam generating device (19); the steam generating device (19) comprises a water tank (19-1), a deaerator (19-2) and an evaporator (19-3); the high-temperature gas circulation pipe (17) passes through the inside of the water tank (19-1) and heats water in the water tank (19-1); the heat energy utilization pipeline (8) passes through the evaporator (19-3) and provides heat energy for the evaporator (19-3); the water tank (19-1) is connected with an inlet of the deaerator (19-2) through a water feed pump, and an outlet of the deaerator (19-2) is connected with a liquid inlet of the evaporator (19-3); the steam outlet of the evaporator (19-3) is respectively connected with the input end of the heat supply network and the steam inlet of the deaerator (19-2).
17. A waste heat recovery system as defined in claim 16, wherein: the steam generating device (19) also comprises a superheater (19-4); the heat energy utilization pipeline (8) passes through the superheater (19-4) and provides heat energy for the superheater (19-4); the steam outlet of the evaporator (19-3) is also connected with the steam inlet of the superheater (19-4), and the steam outlet of the superheater (19-4) is connected with the input end of the heat supply network.
18. A waste heat recovery system as defined in claim 17, wherein: the steam generating device (19) further comprises a preheater (19-5); the heat energy utilization pipeline (8) passes through the preheater (19-5) and provides heat energy for the preheater (19-5); the steam outlet of the evaporator (19-3) is connected with the inlet of the preheater (19-5), and the outlet of the preheater (19-5) is connected with the input end of the heat supply network.
19. A waste heat recovery system as defined in claim 18, wherein: the steam generating device (19) also comprises a continuous blowdown tank (19-6) and a periodic blowdown tank (19-7); the evaporator (19-3) is provided with a continuous sewage draining pipe and a periodic sewage draining pipe; the continuous sewage discharge pipe is connected with an inlet of the continuous sewage discharge tank (19-6), an outlet of the continuous sewage discharge tank (19-6) is connected with a first inlet of the periodic sewage discharge tank (19-7), and the periodic sewage discharge pipe is connected with a second inlet of the periodic sewage discharge tank (19-7); and a drain outlet is arranged on the periodic sewage draining tank (19-7).
20. A waste heat recovery system as defined in claim 18, wherein: the thermal energy application unit further comprises a steam turbine group (20) driven by steam; the steam turbine set (20) is provided with a steam inlet and a condensed water outlet; and a steam outlet of the superheater (19-4) is connected with a steam inlet of the steam turbine set (20).
21. A waste heat recovery system as claimed in claim 13, wherein: the first conveying mechanism (11) comprises a track, and a transport vehicle (11-1) which is provided with a driving device and can travel along the track under the driving of the driving device is arranged on the track; the transport vehicle (11-1) comprises a vehicle body; the upper end of the car body is provided with a material receiving port (11-2), and the bottom of the car body is provided with a discharge port (11-3) with a gate; a material receiving opening (11-2) of the vehicle body can be correspondingly matched with a material discharging opening (1-2) of the heat exchange box body (1) to receive materials, and a material discharging opening (11-3) of the vehicle body can be correspondingly matched with a material feeding opening (12-1) of the solid-state metallurgical slag granulator (12) to discharge materials.
22. A waste heat recovery system as claimed in claim 13, wherein: the second conveying mechanism (13) comprises a steel slag transport vehicle (13-1) capable of receiving high-temperature metallurgical slag particles discharged from a discharge opening (12-2) of the solid-state metallurgical slag granulator (12), and a lifting platform device (13-2); the lifting platform device (13-2) comprises a lifting frame (13-2-1); a lifting track is arranged on the lifting frame (13-2-1), a lifting platform (13-2-2) is arranged on the lifting track in a sliding mode, and the lifting platform (13-2-2) enables the lifting platform (13-2-2) to lift between a low position and a high position of the lifting frame (13-2-1) along the lifting track through a lifting driving device; a channel for the steel slag transport vehicle (13-1) to open onto the lifting platform (13-2-2) is arranged at the lower position of the lifting frame (13-2-1); the high position of the lifting frame (13-2-1) is provided with a discharging position for discharging the steel slag transport vehicle (13-1) to the material inlet (14-2) of the high-temperature solid particle heat exchange device (14).
23. A waste heat recovery system as claimed in claim 13, wherein: a third conveying mechanism (21); the third conveying mechanism (21) can receive a conveying belt or a slag conveying vehicle of the waste slag discharged from the material outlet (14-3) of the high-temperature solid particle heat exchange device (14).
24. A waste heat recovery system as defined in claim 20, wherein: heat exchange assemblies (2) are also arranged in the heat exchange box body (1) and on the peripheral side walls of the heat exchange box body (1); a first cooling pipe group (1-7) is arranged inside the quick opening door (1-3); the inlet and the outlet of the first cooling pipe group (1-7) extend out of the interior of the quick-opening door (1-3);
a second cooling pipe group (1-8) is embedded in the top cover (1-4) of the heat exchange box body (1), and the inlet and the outlet of the second cooling pipe group (1-8) extend out of the top cover (1-4); the inlet of the first cooling pipe group (1-7) and the inlet of the second cooling pipe group (1-8) are both connected with the outlet of a cold water tank (22), and the inlet of the cold water tank (22) is connected with the condensed water outlet of the steam turbine unit (20) through a water return pipeline; the outlets of the first cooling pipe group (1-7) and the outlets of the second cooling pipe group (1-8) are connected with the inlet of a water tank (19-1) of the steam generating device (19).
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| CN201920878047.6U CN211040914U (en) | 2019-06-12 | 2019-06-12 | Liquid metallurgical sediment waste heat recovery device and waste heat recovery system |
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| CN201920878047.6U CN211040914U (en) | 2019-06-12 | 2019-06-12 | Liquid metallurgical sediment waste heat recovery device and waste heat recovery system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110186019A (en) * | 2019-06-12 | 2019-08-30 | 江苏联储能源科技有限公司 | Ultrahigh-temperature liquid metallurgical slag waste-heat recovery device and residual neat recovering system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110186019A (en) * | 2019-06-12 | 2019-08-30 | 江苏联储能源科技有限公司 | Ultrahigh-temperature liquid metallurgical slag waste-heat recovery device and residual neat recovering system |
| CN110186019B (en) * | 2019-06-12 | 2024-01-16 | 江苏联储能源科技有限公司 | Extra-high temperature liquid metallurgical slag waste heat recovery device and waste heat recovery system |
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