A device for recycling and comprehensive utilization of dust containing heavy metals and its use method

Abstract

The invention relates to the technical field related to metal processing, and discloses a heavy metal dust ash resource recovery and comprehensive utilization equipment and a use method thereof, comprising a bag filter, an electrothermal carbon reduction mechanism, an input silo, a transmission material pipe and a zinc condensation mechanism, wherein the zinc condensation mechanism comprises a zinc condensation box body, and the zinc condensation box body consists of an upper box body and a lower box bottom. A condensation processing chamber is arranged in the zinc condensation box body; in the heavy metal dust ash resource recovery and comprehensive utilization equipment of the invention, slag and a certain amount of liquid metal (mainly iron) can be periodically discharged from the furnace through the discharge port end of the electrothermal carbon reduction mechanism through the flue gas dust transmission structure, and the slag and the discharged liquid metal are recovered and reused, and at the same time, after the flue gas dust is processed and discharged by the reaction treatment furnace, it passes through the zinc condensation mechanism again, so that the metal (mainly zinc) in the flue gas dust is condensed into liquid zinc and recycled.

Description

Technical Field

[0001] The present invention relates to the technical field related to metal processing, and in particular to a comprehensive utilization device for recycling dust ash containing heavy metals and a method for using the same. Background Art

[0002] my country's annual steel production has exceeded 1 billion tons, and the total social steel stock has exceeded 10 billion tons. The output of scrap steel has increased rapidly, and the short-process electric furnace steelmaking process using scrap steel as raw materials has developed rapidly. The long-process steelmaking process is also increasing the use of scrap steel due to economic interests. At the same time, the demand for stainless steel and special steel has also increased significantly. This situation will further aggravate the harmfulness of steel smelting slag dust and mud, which needs to be treated. The current rotary kiln and rotary hearth furnace processes are difficult to treat slag dust and mud, and there are potential environmental risks, and the recycling efficiency of heavy metal resources is not high. Summary of the invention

[0003] The object of the present invention is to provide a heavy metal dust ash resource recovery and comprehensive utilization device and a method of using the same, so as to overcome the above-mentioned defects in the prior art.

[0004] The present invention is achieved through the following technical solutions.

[0005] The invention discloses a comprehensive utilization equipment for recycling heavy metal dust ash resources, comprising a bag filter, an electric heating carbon reduction mechanism, an input silo, a transmission material pipe and a zinc condensation mechanism, wherein the zinc condensation mechanism comprises a zinc condensation box body, which is composed of an upper box body and a lower box bottom. A condensation processing chamber is arranged in the zinc condensation box body, and a partition condenser is fixedly installed in the condensation processing chamber. The partition condenser comprises a condensation end cover, a condensation bottom shell is fixedly arranged on the lower side of the condensation end cover, a rotating carrying chamber is arranged in the condensation bottom shell, a partition condensation plate is rotatably installed in the rotating carrying chamber, a partition condensation chamber is arrayed in the partition condensation plate, a stirring blade rod is rotatably installed in the partition condensation chamber, a sliding connecting piece is arranged at a corresponding position on the top wall of the partition condensation chamber, a connecting annular groove opening downward is arranged on the inner wall of the condensation bottom shell, a connecting through hole is fixedly arranged on the side wall of the partition condensation chamber, a connecting notch groove communicating with the rotating carrying chamber is arranged on the inner wall of the connecting annular groove, and a connecting piece matching with the sliding connecting piece is arranged on the inner wall of the top of the condensation end cover.

[0006] A further technical solution is that the sliding connecting piece includes a connecting port, a connecting slide pipe, a supporting spring and a tapered pipe mouth. The connecting slide pipe is slidably arranged in the connecting port through the supporting spring sleeved at the bottom and the tapered pipe mouth at the top. The corresponding inner walls of the condensation bottom shell and the corresponding positions of the condensation end cover are provided with annular sliding grooves. The annular sliding grooves are provided with tapered connecting grooves corresponding to the corresponding connecting positions of the inlet port and the outlet port. The connecting piece is arranged in the tapered connecting groove, and the connecting piece is a connecting valve body.

[0007] According to a further technical solution, a condensation inlet and a smoke exhaust outlet are respectively provided on the top of the upper box body, an inlet port and an outlet port are respectively provided on the inner wall of the condensation end cover, and the condensation inlet and the smoke exhaust outlet are respectively connected with the inlet port and the outlet port through connecting straight pipes.

[0008] A further technical solution is that the electrothermal carbon reduction mechanism includes a reaction treatment furnace, a furnace top cover is fixedly provided on the top of the reaction treatment furnace, the reaction treatment furnace is equipped with an arc plasma gun and a water cooling device, a furnace bottom electrode is provided at the bottom of the reaction treatment furnace, a discharge port is provided on the bottom side wall of the reaction treatment furnace, an input port and an output port are provided on the top of the furnace top cover, the bottom output port of the input silo is connected with the top input port of the transmission pipe, the transmission pipe output port is connected with the input port, the output port is connected with the condensation inlet through a transmission pipeline, the smoke exhaust port is connected with the bag filter input port through a transmission pipeline equipped with an air-cooled one-way valve, the side input port of the input silo is connected with the output end of the electric furnace dust transmission pipeline, the top of the input silo is connected with the carbon dust input pipe, and the bag filter output end is connected with the side reflux input end of the electric furnace dust transmission pipeline.

[0009] According to a further technical solution, a control console seat is provided at the center of the partition condensation plate, and a matching transmission cavity is provided in the control console seat.

[0010] A further technical solution is that two groups of motor fixing frames are fixedly installed on the outer wall of the upper box body, the motor fixing frame on the left side is fixedly installed with a power motor, the output shaft of the power motor is connected to the power shaft through a group of first pulleys and in cooperation with the transmission belt transmission, the power shaft passes through the through holes of the upper box body and the inner wall of the condensation end cover and is fixed in the matching transmission cavity, the power shaft is provided with an inner shaft through groove, a stirring drive shaft is rotatably installed in the inner shaft through groove, the motor fixing frame on the right side is fixedly installed with a stirring motor, the output shaft of the stirring motor is connected to the top of the stirring drive shaft through a group of second pulleys and in cooperation with the transmission belt transmission, the end of the stirring drive shaft passes through the through hole on the lower side of the matching transmission cavity, the end of the stirring drive shaft is placed in the lower space of the condensation treatment chamber and is fixedly installed with a stirring fan blade.

[0011] A further technical solution is that the inner wall of the separating condensation plate is provided with a shaft sleeve fixing groove, a fixed shaft sleeve is fixedly installed in the shaft sleeve fixing groove, a blade rod transmission shaft is rotatably installed in the fixed shaft sleeve, one end of the blade rod transmission shaft is fixedly connected to the corresponding stirring blade rod shaft body, the other end of the blade rod transmission shaft is provided with helical teeth and is placed in the matching transmission cavity, the stirring transmission shaft is fixedly installed with a transmission end block in the matching transmission cavity, a transmission helical gear is fixedly installed on the lower side of the transmission end block, and the helical teeth at the end of the blade rod transmission shaft are meshed with the transmission helical gear for transmission.

[0012] A further technical solution is that the outer wall of the bottom of the upper box body is provided with a stepped docking section, and the top inner wall of the lower box bottom is correspondingly provided with a stepped matching section. The upper box body and the lower box bottom are inserted through docking and fixed with matching screw holes and screws to achieve splicing and sealing to form the zinc condensation box as a whole. The side wall of the lower box bottom is provided with an overflow port, and the side wall of the condensation end cover is provided with an edge fixing portion. The inner wall of the upper box body is provided with a fixed table plate portion, and the fixed table plate portion is fixedly installed on the upper side of the edge fixing portion by screws.

[0013] The present invention also includes a method for using a heavy metal dust ash resource recovery and comprehensive utilization device, comprising:

[0014] Step 1: Connect the electric furnace dust pipe and the carbon dust pipe to the input silo for dust transmission;

[0015] Step 2: The blower at the side end of the transmission pipe is started to introduce the mixed dust transmitted from the input silo into the electrothermal carbon reduction mechanism through the transmission pipe in combination with wind pressure to perform electrothermal carbon reduction on the metal oxides in the dust;

[0016] Step 3: There is a water cooling device in the top of the reaction furnace and it is lined with rock soil refractory bricks. The electric heat carbon reduction mechanism is heated by a plasma gun that directly acts on the inside using direct current. The plasma gun is axially installed on the top of the reaction furnace through a spherical seal. During the smelting process, the heat can be distributed along the surface of the molten metal by moving the plasma arc support spot, thereby promoting the stirring of the molten metal; the cathode of the plasma gun is a hollow graphite electrode, and argon gas is used as the plasma gas source, or argon-nitrogen mixed gas is used as the plasma gas source. During smelting, the dust generated by the arc furnace and the carbon or coke reducing agent enter the smelting chamber through a dedicated pipeline on the top of the reaction furnace. The electric power of the ion gun can keep the temperature of the molten metal at 1700K-2000K;

[0017] Step 4: Add slag-forming ingredients during the smelting process to obtain a slag pool with a ratio of CaO: SiO2=1.0.~1.2, thereby ensuring that the activity of zinc oxide is high enough;

[0018] Step 5: The liquid slag and molten iron in the slag pool are recycled through wind quenching granulation or ingot casting, while the oxides of zinc, lead and cadmium are reduced in the furnace and discharged in the form of gas together with the gas coming out of the furnace through the output port and processed in the zinc condensation mechanism.

[0019] Step 6: The condensation treatment chamber is filled with a proper amount of liquid zinc for condensation, and the height of the liquid zinc is higher than the lower opening of the connecting ring groove so that the connecting ring groove is also filled with liquid zinc. Each separated condensation chamber is connected through a through hole so that the liquid zinc in the connecting ring groove is filled into the current connected separated condensation chamber. The power motor is started intermittently to drive the angle of the separated condensation plate to deflect through the power shaft, so that the introduction port is connected with the separated condensation chamber, and the heavy metal-containing gas discharged from the output port is introduced into the currently connected separated condensation chamber through the introduction port, so that the zinc-containing heavy metal gas and the internal liquid zinc are cooled and reacted in the separated condensation chamber to form liquid zinc;

[0020] Step 7: As the power motor is started intermittently, the zinc furnace gas and liquid zinc react in the separated condensation chamber, and the stirring motor is started to drive the stirring drive shaft to rotate through the transmission bevel gear and the blade drive shaft to drive each stirring blade to rotate to form a zinc rain curtain inside to efficiently cool the furnace gas and improve the cooling efficiency;

[0021] Step 8: After completing the cooling cycle of half a rotation, the corresponding separated condensation chamber is connected with the outlet port on the top of the other side in turn, and the gas and dust leaving the zinc condensation mechanism are then sent to the bag filter through the pipeline and the air-cooled one-way valve for filtration. The air-cooled one-way valve is set so that the furnace gas can only be output in one direction and the air will not flow back into the zinc condensation mechanism to avoid the formation of zinc oxide, and after filtration, it returns to the starting point or is input into the electric furnace for re-extraction treatment;

[0022] Step nine: in the process of raising the zinc rain curtain by the stirring blade to efficiently cool the furnace gas and convert the internal gaseous zinc into liquid zinc, as the internal liquid zinc increases, it will flow back to the connecting ring groove through the connecting through hole and the connecting notch groove. At the same time, the bottom opening of the connecting ring groove is connected to the condensation processing chamber, so that the liquid zinc gradually increases with the progress of condensation, and the liquid zinc level in the condensation processing chamber gradually increases. When it is higher than the overflow port height, the liquid zinc flows out from the overflow port, passes through the external guide groove plate to the molding groove plate at the end thereof, and is cooled and solidified into a shape.

[0023] Beneficial effects of the present invention:

[0024] In the heavy metal dust ash resource recovery and comprehensive utilization equipment of the present invention, the slag and a certain amount of liquid metal (mainly iron) can be periodically discharged from the furnace through the discharge port end of the electric heat carbon reduction mechanism through the flue gas dust transmission structure, and the slag and the discharged liquid metal are recovered and reused. At the same time, after the flue gas dust is processed and discharged from the reaction treatment furnace, it passes through the zinc condensation mechanism again to condense the metal (mainly zinc) in the flue gas dust into liquid zinc and recycle it, thereby greatly improving the recovery and utilization effect of the metal resources in the heavy metal dust ash resources;

[0025] In the heavy metal dust ash resource recovery and comprehensive utilization equipment of the present invention, the various functional components are jointly composed to realize the heavy metal resource processing, discharge and flue gas closed-loop circulation functions. The flue gas containing heavy metal dust ash resources is first introduced into the electric thermal carbon reduction mechanism, and undergoes electric thermal carbon reduction and smelting processes in the reaction treatment furnace to realize the production of slag and liquid metal mainly composed of iron resources. The condensation treatment of heavy metal resources mainly composed of zinc is then completed and overflow is discharged, and the flue gas is filtered again through the bag filter and then re-introduced into the starting point for circulation treatment, thereby greatly improving the recovery and utilization efficiency of metal resources in the heavy metal dust ash resources and reducing resource waste;

[0026] A zinc condensation mechanism is provided in a heavy metal dust ash resource recovery and comprehensive utilization device of the present invention. Conventional zinc condensation processors pass flue gas into the overall cavity and perform condensation treatment by the bottom wall liquid. The zinc condensation mechanism of the present invention can realize that after the flue gas is introduced, it is divided into multiple portions and separated for condensation treatment by rotating multiple groups of separated condensation chambers and related functional connecting components inside the cavity. A single portion of flue gas contacts with liquid zinc in the separated condensation chamber, and with the help of the stirring blade rod, zinc rain is raised in the independent cavity to achieve efficient condensation treatment, thereby avoiding the problem of low condensation efficiency caused by small contact area and single contact effect when a large amount of flue gas is treated by the bottom liquid in the overall cavity, and the side connecting structure is used to realize high-efficiency reflux and overflow discharge condensation molding processing functions, thereby greatly improving the zinc condensation efficiency and recovery efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0028] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0029] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0030] Figure 2 yes Figure 1 A schematic diagram of the structure of the zinc condensation mechanism 15;

[0031] Figure 3 yes Figure 2 A schematic diagram of the structure of the middle partition condenser 20;

[0032] Figure 4 yes Figure 3 A schematic diagram of the enlarged structure at A in the middle;

[0033] Figure 5 yes Figure 3 A schematic structural diagram of the middle sliding connecting member 25;

[0034] Figure 6 yes Figure 1 A schematic diagram of the structure of the electric thermal carbon reduction mechanism 12. DETAILED DESCRIPTION

[0035] Combine the following Figure 1-6 The present invention is described in detail. For the convenience of description, the directions mentioned below are defined as follows: the up, down, left, right, front, and back directions mentioned below are the same as Figure 1 The up-down, left-right, front-back directions of the projection relationship itself are consistent.

[0036] In combination with the accompanying drawings 1-6, a heavy metal dust ash resource recovery and comprehensive utilization equipment is described, including a bag filter 11, an electric heat carbon reduction mechanism 12, an input silo 13, a transmission material pipe 14 and a zinc condensation mechanism 15, the zinc condensation mechanism 15 includes a zinc condensation box 16, the zinc condensation box 16 is composed of an upper box 17 and a lower box bottom 18. A condensation processing chamber 19 is provided in the zinc condensation box 16, and a partition condenser 20 is fixedly installed in the condensation processing chamber 19. The partition condenser 20 includes a condensation end cover 21, and a condensation bottom shell 22 is fixedly provided on the lower side of the condensation end cover 21. The condensation bottom shell 22 is provided with a rotating mounting Cavity 23, a partition condensation plate 24 is rotatably installed in the rotating carrying cavity 23, a partition condensation cavity 26 is arrayed in the partition condensation plate 24, a stirring blade 40 is rotatably installed in the partition condensation cavity 26, a sliding connecting piece 25 is provided at the corresponding position of the top wall of the partition condensation cavity 26, a connecting annular groove 28 opening downward is provided on the inner wall of the condensation bottom shell 22 near the outer side, a connecting through hole 53 is fixedly provided on the side wall of the partition condensation cavity 26, a connecting notch groove 29 connected to the rotating carrying cavity 23 is provided on the inner wall of the connecting annular groove, and a connecting piece matched with the sliding connecting piece is provided on the top inner wall of the condensation end cover.

[0037] Preferably, the sliding connecting piece 25 includes a connecting port 55, a connecting slide tube 56, a support spring 57 and a tapered pipe mouth 58. The connecting slide tube 56 is slidably arranged in the connecting port 55 through the support spring 57 sleeved at the bottom and the tapered pipe mouth 58 at the top. The corresponding condensation bottom shell 22 and the inner wall of the corresponding position of the condensation end cover 21 are provided with an annular sliding groove 59. The annular sliding groove 59 is provided with a tapered connecting groove 60 corresponding to the corresponding connecting position of the inlet port 51 and the outlet port 52. The connecting piece is arranged in the tapered connecting groove 60, and the connecting piece is a connecting valve body.

[0038] Preferably, a condensation inlet 41 and a smoke exhaust outlet 42 are respectively provided on the top of the upper box body 17, and an inlet port 51 and an outlet port 52 are respectively provided on the inner wall of the condensation end cover 21. The condensation inlet 41 and the smoke exhaust outlet 42 are connected to the inlet port 51 and the outlet port 52 through connecting straight pipes.

[0039] Preferably, the electrothermal carbon reduction mechanism 12 includes a reaction processing furnace 61, a furnace top cover 62 is fixedly provided on the top of the reaction processing furnace 61, an arc plasma gun 65 and a water cooling device are installed in the reaction processing furnace 61, a furnace bottom electrode 66 is provided at the bottom of the reaction processing furnace 61, a discharge port 67 is provided on the bottom side wall of the reaction processing furnace 61, an input port 63 and an output port 64 are provided on the top of the furnace top cover 62, the bottom output port of the input silo 13 is connected to the top input port of the transmission pipe 14, the output port of the transmission pipe 14 is connected to the input port 63, the output port 64 is connected to the condensation inlet 41 through the transmission pipeline, the smoke exhaust port 42 is connected to the input port of the bag filter 11 through the transmission pipeline equipped with an air-cooled one-way valve 70, the side input port of the input silo 13 is connected to the output end of the electric furnace dust transmission pipeline, the top of the input silo 13 is connected to the carbon dust input pipe, and the output end of the bag filter 11 is connected to the side reflux input end of the electric furnace dust transmission pipeline.

[0040] Preferably, a control console seat 30 is provided at the center of the partition condensation plate 24 , and a matching transmission cavity 35 is provided in the control console seat 30 .

[0041] Preferably, two groups of motor fixing frames 82 are fixedly installed on the outer wall of the upper box body 17, and the motor fixing frame 82 on the left side is fixedly installed with a power motor 46, and the output shaft of the power motor 46 is connected to the power shaft 45 through a group of first pulleys 84 and in cooperation with the transmission belt transmission, the power shaft 45 passes through the through holes of the upper box body 17 and the inner wall of the condensation end cover 21 and is fixed in the matching transmission cavity 35, and an inner shaft through groove 81 is provided in the power shaft 45, and a stirring drive shaft 80 is rotatably installed in the inner shaft through groove 81, and a stirring motor 83 is fixedly installed on the motor fixing frame 82 on the right side, and the output shaft of the stirring motor 83 is connected to the top of the stirring drive shaft 80 through a group of second pulleys 85 and in cooperation with the transmission belt transmission, and the end of the stirring drive shaft 80 passes through the through hole on the lower side of the matching transmission cavity 35, and the end of the stirring drive shaft 80 is placed in the lower space of the condensation treatment chamber 19 and fixedly installed with a stirring fan blade 27.

[0042] Preferably, a shaft sleeve fixing groove 34 is provided on the inner wall of the separating condensation plate 24, a fixed shaft sleeve 36 is fixedly installed in the shaft sleeve fixing groove 34, a blade rod transmission shaft 37 is rotatably installed in the fixed shaft sleeve 36, one end of the blade rod transmission shaft 37 is fixedly connected to the corresponding stirring blade rod shaft body, the other end of the blade rod transmission shaft 37 is provided with helical teeth and is placed in a matching transmission cavity 35, a stirring transmission shaft 80 is fixedly installed with a transmission end block 38 in the matching transmission cavity 35, a transmission helical gear 39 is fixedly installed on the lower side of the transmission end block 38, and the helical teeth at the end of the blade rod transmission shaft 37 are meshed with the transmission helical gear 39 for transmission.

[0043] Preferably, the outer wall at the bottom of the upper box body 17 is provided with a stepped docking section, and the inner wall at the top of the lower box bottom 18 is correspondingly provided with a stepped matching section. The upper box body 17 and the lower box bottom 18 are inserted through docking and fixed with screw holes and screws to achieve splicing and sealing to form the zinc condensation box body 16 as a whole. The side wall of the lower box bottom 18 is provided with an overflow port 44, and the side wall of the condensation end cover 21 is provided with an edge fixing portion 47. The inner wall of the upper box body 17 is provided with a fixed platform portion 48, and the fixed platform portion 48 is fixed to the upper side of the edge fixing portion 47 by screws.

[0044] The present invention also includes a method for using a heavy metal dust ash resource recovery and comprehensive utilization device, comprising:

[0045] Step 1: The electric furnace dust pipe and the carbon dust pipe are connected to the input silo 13 for dust transmission;

[0046] Step 2: The blower at the side end of the conveying pipe 14 is started to introduce the mixed dust transmitted from the input silo 13 into the electrothermal carbon reduction mechanism 12 through the conveying pipe 14 in combination with the wind pressure, and electrothermal carbon reduction is performed on the metal oxides in the dust;

[0047] Step 3: The top of the reaction furnace 61 is provided with a water cooling device and is lined with rock clay refractory bricks. The electric heat carbon reduction mechanism 12 is heated by a plasma gun directly acting on the inside using direct current. The plasma gun is axially installed on the top of the reaction furnace 61 through a spherical seal. During the smelting process, the heat can be distributed along the surface of the molten metal by moving the plasma arc support spot, thereby promoting the stirring of the molten metal; the cathode of the plasma gun is a hollow graphite electrode, and argon gas is used as the plasma gas source, or an argon-nitrogen mixed gas is used as the plasma gas source. During smelting, the dust generated by the arc furnace and the carbon or coke reducing agent enter the smelting chamber through a dedicated pipeline on the top of the reaction furnace 61. The electric power of the ion gun can keep the temperature of the molten metal at 1700K-2000K;

[0048] Step 4: Add slag-forming ingredients during the smelting process to obtain a slag pool with a ratio of CaO: SiO2=1.0~1.2, thereby ensuring that the activity of zinc oxide is high enough;

[0049] Step 5: The liquid slag and molten iron in the slag pool are recycled through wind quenching granulation or ingot casting, while the oxides of zinc, lead and cadmium are reduced in the furnace and discharged in the form of gas together with the gas emerging from the furnace through the output port 64 and processed in the zinc condensation mechanism 15.

[0050] Step 6: The condensation processing chamber 19 is filled with a proper amount of liquid zinc for condensation. The height of the liquid zinc is higher than the lower opening of the connecting annular groove 28 so that the connecting annular groove 28 is also filled with liquid zinc. Each separated condensation chamber 26 is connected through the through hole 53 so that the liquid zinc in the connecting annular groove 28 is filled into the current connected separated condensation chamber 26. The power motor 46 is started intermittently to drive the separated condensation plate 24 to deflect the angle through the power shaft 45, so that the introduction port 51 is connected with the separated condensation chamber 26. The heavy metal-containing gas discharged from the output port 64 is introduced into the currently connected separated condensation chamber 26 through the introduction port 51, so that the zinc-containing heavy metal gas and the internal liquid zinc are cooled and reacted in the separated condensation chamber 26 to form liquid zinc.

[0051] Step 7: With the intermittent start of the power motor 46, the zinc furnace gas and the liquid zinc react in the separated condensation chamber 26, and the stirring motor 83 is started to drive the stirring transmission shaft 80 to rotate through the transmission bevel gear 39 and the blade transmission shaft 37 to drive each stirring blade 40 to rotate to form a zinc rain curtain inside to efficiently cool the furnace gas and improve the cooling efficiency;

[0052] Step 8: After completing the cooling cycle of half a rotation, the corresponding separated condensation chamber 26 is connected with the outlet port 52 at the top of the other side in turn, and the gas and dust leaving the zinc condensation mechanism 15 are then sent to the bag filter 11 through the pipeline and the air-cooled one-way valve 70 for filtration. The air-cooled one-way valve 70 is set so that the furnace gas can only be output in one direction and the air will not flow back into the zinc condensation mechanism to avoid the formation of zinc oxide, and after being filtered, it returns to the starting point or is input into the electric furnace for re-extraction treatment;

[0053] Step nine: In the process of raising the zinc rain curtain by the stirring blade 40 to efficiently cool the furnace gas and convert the internal gaseous zinc into liquid zinc, as the internal liquid zinc increases, it will flow back to the connecting ring groove 28 through the connecting through hole 53 and the connecting notch groove 29. At the same time, the bottom opening of the connecting ring groove 28 is connected to the condensation processing chamber 19, so that the liquid zinc gradually increases with the progress of condensation, and the liquid zinc level in the condensation processing chamber 19 gradually increases. When it is higher than the overflow port 44, the liquid zinc flows out from the overflow port, passes through the external guide groove plate to the molding groove plate at its end, and is cooled and solidified into a shape.

[0054] In the heavy metal dust ash resource recovery and comprehensive utilization equipment of the present invention, the slag and a certain amount of liquid metal (mainly iron) can be periodically discharged from the furnace through the discharge port 67 end of the electric heat carbon reduction mechanism 12 through the flue gas dust transmission structure, and the slag and the discharged liquid metal are recovered and reused. At the same time, after the flue gas dust is processed and discharged by the reaction treatment furnace 61, it passes through the zinc condensation mechanism 15 again to condense the metal (mainly zinc) in the flue gas dust into liquid zinc and recycle it, thereby greatly improving the recovery and utilization effect of the metal resources in the heavy metal dust ash resources;

[0055] In a heavy metal dust ash resource recovery and comprehensive utilization device of the present invention, various functional components are jointly composed to realize the heavy metal resource processing, discharge and flue gas closed-loop circulation functions. The flue gas containing heavy metal dust ash resources is first introduced into the electric thermal carbon reduction mechanism 12, and undergoes electric thermal carbon reduction and smelting processes in the reaction treatment furnace 61, so that the production slag and liquid metal mainly composed of iron resources can be processed and discharged. Then, it is transmitted to the zinc condensation mechanism 15 to complete the condensation treatment of heavy metal resources mainly composed of zinc and overflow discharge, and the flue gas is filtered again by the bag filter 11, and the filtered smoke is re-introduced into the starting point for circulation treatment, thereby greatly improving the recovery efficiency of metal resources in the heavy metal dust ash resources and reducing resource waste;

[0056] In a heavy metal dust ash resource recovery and comprehensive utilization device of the present invention, a zinc condensation mechanism 15 is arranged. Conventional zinc condensation processors pass smoke into the overall cavity and perform condensation treatment by the bottom wall liquid. The zinc condensation mechanism 15 of the present invention can realize that after the smoke is introduced, it is divided into multiple portions and separated for condensation treatment by rotating multiple groups of separated condensation chambers 26 and related functional connecting components inside the rotating carrying chamber 23. A single portion of smoke contacts with liquid zinc in the separated condensation chamber 26, and with the rotation and stirring of the stirring blade 40, zinc rain is raised in the independent cavity to achieve efficient condensation treatment, thereby avoiding the problem of low condensation efficiency caused by small contact area and single contact effect when a large amount of smoke is treated by the bottom liquid in the overall cavity, and the side connecting structure is used to realize high-efficiency reflux and overflow discharge condensation molding processing functions, thereby greatly improving the zinc condensation efficiency and recovery efficiency.

[0057] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology in this field to understand the content of the present invention and implement it, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A heavy metal dust ash resource recovery and comprehensive utilization equipment, including a bag filter, an electric heating carbon reduction mechanism, an input silo, a transmission material pipe and a zinc condensation mechanism, characterized in that: The zinc condensation mechanism comprises a zinc condensation box body, which consists of an upper box body and a lower box bottom. A condensation processing chamber is arranged in the zinc condensation box body, a partition condenser is fixedly installed in the condensation processing chamber, the partition condenser comprises a condensation end cover, a condensation bottom shell is fixedly arranged on the lower side of the condensation end cover, a rotating carrying chamber is arranged in the condensation bottom shell, a partition condensation plate is rotatably installed in the rotating carrying chamber, a partition condensation chamber is arrayed in the partition condensation plate, a stirring blade is rotatably installed in the partition condensation chamber, a sliding connecting piece is arranged at a corresponding position on the top wall of the partition condensation chamber, a connecting annular groove opening downward is arranged on the inner wall of the condensation bottom shell, a connecting through hole is fixedly arranged on the side wall of the partition condensation chamber, a connecting notch groove communicating with the rotating carrying chamber is arranged on the inner wall of the connecting annular groove, and a connecting piece matching with the sliding connecting piece is arranged on the inner wall of the top of the condensation end cover; The top of the upper box body is respectively provided with a condensation inlet and a smoke exhaust port, and the inner wall of the condensation end cover is respectively provided with an inlet port and an outlet port, and the condensation inlet and the smoke exhaust port are respectively connected with the inlet port and the outlet port through a connecting straight pipe; The sliding connecting piece includes a connecting port, a connecting slide pipe, a supporting spring and a tapered pipe mouth. The connecting slide pipe is slidably arranged in the connecting port through the supporting spring sleeved at the bottom and the tapered pipe mouth at the top. The corresponding inner walls of the condensation bottom shell and the corresponding positions of the condensation end cover are provided with annular sliding grooves. The annular sliding grooves are provided with tapered connecting grooves corresponding to the corresponding connecting positions of the inlet port and the outlet port. The connecting piece is arranged in the tapered connecting groove, and the connecting piece is a connecting valve body.

2. The heavy metal dust ash resource recovery and comprehensive utilization equipment according to claim 1 is characterized by: The electrothermal carbon reduction mechanism includes a reaction treatment furnace, a furnace top cover is fixedly provided on the top of the reaction treatment furnace, an arc plasma gun and a water cooling device are installed in the reaction treatment furnace, a furnace bottom electrode is provided at the bottom of the reaction treatment furnace, a discharge port is provided on the bottom side wall of the reaction treatment furnace, an input port and an output port are provided on the top of the furnace top cover, the bottom of the input silo is connected with the top of the transmission pipe, the transmission pipe output port is connected with the input port, the output port is connected with the condensation inlet through a transmission pipeline, the smoke exhaust port is connected with the bag filter input port through a transmission pipeline equipped with an air-cooled one-way valve, the input port at the side end of the input silo is connected with the output end of the electric furnace dust transmission pipeline, the top of the input silo is connected with the carbon dust input pipe, and the bag filter output end is connected with the side reflux input end of the electric furnace dust transmission pipeline.

3. The heavy metal dust ash resource recovery and comprehensive utilization equipment according to claim 1 is characterized in that: A control console seat is provided at the center of the partition condensation plate, and a matching transmission cavity is provided in the control console seat.

4. The heavy metal dust ash resource recovery and comprehensive utilization equipment according to claim 3 is characterized in that: Two groups of motor fixing frames are fixedly installed on the outer wall of the upper box body, the motor fixing frame on the left side is fixedly installed with a power motor, the output shaft of the power motor is connected to the power shaft through a group of first pulleys and in cooperation with the transmission belt transmission, the power shaft passes through the through holes of the upper box body and the inner wall of the condensation end cover and is fixed in the matching transmission cavity, an inner shaft through groove is provided in the power shaft, a stirring transmission shaft is rotatably installed in the inner shaft through groove, the motor fixing frame on the right side is fixedly installed with a stirring motor, the output shaft of the stirring motor is connected to the top of the stirring transmission shaft through a group of second pulleys and in cooperation with the transmission belt transmission, the end of the stirring transmission shaft passes through the through hole on the lower side of the matching transmission cavity, the end of the stirring transmission shaft is placed in the lower space of the condensation treatment chamber and is fixedly installed with a stirring fan blade.

5. The heavy metal dust ash resource recovery and comprehensive utilization equipment according to claim 4 is characterized in that: The inner wall of the partition condensation plate is provided with a shaft sleeve fixing groove, a fixed shaft sleeve is fixedly installed in the shaft sleeve fixing groove, a blade rod transmission shaft is rotatably installed in the fixed shaft sleeve, one end of the blade rod transmission shaft is fixedly connected to the corresponding stirring blade rod shaft body, the other end of the blade rod transmission shaft is provided with helical teeth and is placed in the matching transmission cavity, the stirring transmission shaft is fixedly installed with a transmission end block in the matching transmission cavity, a transmission helical gear is fixedly installed on the lower side of the transmission end block, and the helical teeth at the end of the blade rod transmission shaft mesh with the transmission helical gear for transmission.

6. The heavy metal dust ash resource recovery and comprehensive utilization equipment according to claim 1 is characterized by: The outer wall of the bottom of the upper box body is provided with a stepped docking section, and the inner wall of the top of the lower box bottom is correspondingly provided with a stepped matching section. The upper box body and the lower box bottom are inserted through docking and fixed with screw holes and screws to achieve splicing and sealing to form the zinc condensation box body as a whole. The side wall of the lower box bottom is provided with an overflow port, and the side wall of the condensation end cover is provided with an edge fixing part. The inner wall of the upper box body is provided with a fixed platform part, and the fixed platform part is fixedly installed on the upper side of the edge fixing part by screws.

7. A method for using a heavy metal dust ash resource recovery and comprehensive utilization device according to any one of claims 1 to 6, comprising: Step 1: Connect the electric furnace dust pipe and the carbon dust pipe to the input silo for dust transmission; Step 2: The blower at the side end of the transmission pipe is started to introduce the mixed dust transmitted from the input silo into the electrothermal carbon reduction mechanism through the transmission pipe in combination with wind pressure to perform electrothermal carbon reduction on the metal oxides in the dust; Step 3: There is a water cooling device in the top of the reaction furnace and it is lined with rock soil refractory bricks. The electric heat carbon reduction mechanism is heated by a plasma gun that directly acts on the inside using direct current. The plasma gun is axially installed on the top of the reaction furnace through a spherical seal. During the smelting process, the heat is distributed along the surface of the molten metal by moving the plasma arc support spot, thereby promoting the stirring of the molten metal; the cathode of the plasma gun is a hollow graphite electrode, and argon gas is used as the plasma gas source, or argon-nitrogen mixed gas is used as the plasma gas source. During smelting, the dust generated by the arc furnace and the carbon or coke reducing agent enter the smelting chamber through a dedicated pipeline on the top of the reaction furnace. The electric power of the ion gun keeps the temperature of the molten metal at 1700K-2000K; Step 4: Add slag-forming ingredients during the smelting process to obtain a slag pool with a ratio of CaO: SiO2=1.0.~1.2, thereby ensuring that the activity of zinc oxide is high enough; Step 5: The liquid slag and molten iron in the slag pool are recycled through wind quenching granulation or ingot casting operation, while the oxides of zinc, lead and cadmium are reduced in the furnace and discharged in the form of gas together with the gas emitted from the furnace through the output port and processed in the zinc condensation mechanism; Step 6: The condensation treatment chamber is filled with liquid zinc for condensation, and the height of the liquid zinc is higher than the lower opening of the connecting ring groove so that the connecting ring groove is also filled with liquid zinc. Each separated condensation chamber is connected through a through hole so that the liquid zinc in the connecting ring groove is filled into the current connected separated condensation chamber. The power motor is started intermittently to drive the angle of the separated condensation plate to deflect through the power shaft, so that the introduction port is connected with the separated condensation chamber, and the heavy metal-containing gas discharged from the output port is introduced into the currently connected separated condensation chamber through the introduction port, so that the zinc-containing heavy metal gas and the internal liquid zinc are cooled and reacted in the separated condensation chamber to form liquid zinc; Step 7: With the intermittent start of the power motor, the zinc furnace gas and liquid zinc react in the separated condensation chamber during the process, and the stirring motor is started to drive the stirring transmission shaft to rotate, and the driving helical gear cooperates with the blade transmission shaft to drive each stirring blade to rotate, so as to form a zinc rain curtain inside to efficiently cool the furnace gas and improve the cooling efficiency; Step 8: After completing the cooling cycle of half a rotation, the corresponding separated condensation chamber is connected with the outlet port on the top of the other side in turn, and the gas and dust leaving the zinc condensation mechanism are then sent to the bag filter through the pipeline and the air-cooled one-way valve for filtration. The air-cooled one-way valve is set so that the furnace gas can only be output in one direction and the air will not flow back into the zinc condensation mechanism to avoid the formation of zinc oxide, and after filtration, it returns to the starting point or is input into the electric furnace for re-extraction treatment; Step nine: in the process of raising the zinc rain curtain by the stirring blade to efficiently cool the furnace gas and convert the internal gaseous zinc into liquid zinc, as the internal liquid zinc increases, it will flow back to the connecting ring groove through the connecting through hole and the connecting notch groove. At the same time, the bottom opening of the connecting ring groove is connected to the condensation processing chamber, so that the liquid zinc gradually increases with the progress of condensation, and the liquid zinc level in the condensation processing chamber gradually increases. When it is higher than the overflow port height, the liquid zinc flows out from the overflow port, passes through the external guide groove plate to the molding groove plate at the end thereof, and is cooled and solidified into a shape.

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