A low-carbon emission reduction device and carbon emission reduction method for pollutant treatment in silicon-manganese alloy production

Abstract

The present invention discloses a low-carbon emission reduction device and a carbon emission reduction method for treating pollutants in the production of silicon-manganese alloys, and relates to the technical field of wastewater treatment. The low-carbon emission reduction device for treating pollutants in the production of silicon-manganese alloys comprises a heavy metal removal mechanism, which comprises: a reaction tank, which serves as a reaction site for wastewater and a heavy metal scavenger, and the heavy metal ions in the wastewater react with the heavy metal scavenger to generate water-insoluble polymer chelated salts and form floccules; a cavity rotating shaft, which is arranged in the central area of ​​the reaction tank; the low-carbon emission reduction device and the carbon emission reduction method for treating pollutants in the production of silicon-manganese alloys, the filter net can separate the floccules from the wastewater during the stirring process, and when the stirring is completed, the separation of the floccules from the wastewater can also be completed, thereby accelerating the process of wastewater treatment, and no subsequent filtering mechanism is required, reducing the volume of the equipment.

Description

Technical Field

[0001] The present invention relates to the technical field of wastewater treatment, and in particular to a low-carbon emission reduction device and a carbon emission reduction method for treating pollutants in silicon-manganese alloy production. Background Art

[0002] During the production of silicon-manganese alloy, heavy metal ions such as manganese and iron will dissolve in the wastewater to form heavy metal wastewater. These heavy metal ions are highly polluting to water bodies, and direct discharge will have a serious impact on the environment.

[0003] These heavy metal ions can be removed by using heavy metal scavengers, which cause the wastewater to react with the heavy metal scavenger to generate flocs. After the flocs are precipitated in the wastewater, the water is extracted for the next process, and the flocs are precipitated separately. However, the precipitation time is relatively long, which prolongs the wastewater treatment time and reduces the wastewater treatment efficiency.

[0004] If the floccules and wastewater are discharged from the reaction tank at the same time and then filtered, it will be necessary to add a subsequent filtering mechanism. Summary of the invention

[0005] In view of the deficiencies of the prior art, the present invention provides a low-carbon emission reduction device and a carbon emission reduction method for pollutant treatment in silicon-manganese alloy production, which solves the problems of sedimentation time and the need for subsequent filtration mechanisms in the prior art.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a low-carbon emission reduction device for pollutant treatment in silicon-manganese alloy production, including a heavy metal removal mechanism, the heavy metal removal mechanism including: a reaction tank, the reaction tank serves as a reaction site for wastewater and a heavy metal scavenger, the heavy metal ions in the wastewater react with the heavy metal scavenger to generate water-insoluble polymer chelated salts and form floccules; a cavity shaft, the cavity shaft is arranged in the central area of ​​the reaction tank; a stirring blade, the stirring blade is arranged on the outside of the cavity shaft, and a plurality of stirring blades are distributed along the axial direction of the cavity shaft, a through groove is opened in the area opposite to the stirring blade on the side of the cavity shaft, each stirring blade includes a first stirring rod and a second stirring rod fixed on the side of the cavity shaft, and the first stirring rod and the second stirring rod are connected to the first stirring rod. The second stirring rod is arranged side by side up and down, and an inner roller is provided between one end of the first stirring rod and the second stirring rod close to the cavity rotating shaft, and an outer roller is provided between the other ends, the inner roller can rotate and drive the filter screen to rotate, so as to make the flocs on the filter screen gradually approach the cavity rotating shaft along the radial direction of the reaction tank, and enter the cavity rotating shaft through the through groove; a spiral lifting auger, the spiral lifting auger is located in the cavity rotating shaft, and the rotation of the spiral lifting auger can lift the flocs in the cavity rotating shaft upward; an air intake assembly, the air intake assembly is located in the inner roller, and the air intake assembly is used to press CO2 generated by the production of silicon manganese alloy, and make CO2 spray from the area of ​​the inner roller opposite to the through groove, so as to provide positive pressure to the flocs on the filter screen passing through the through groove area, so that the flocs on the filter screen facing the through groove enter the cavity rotating shaft.

[0007] Furthermore, a driving component is provided above the cavity rotating shaft for driving the cavity rotating shaft and the spiral lifting auger to rotate in opposite directions; the upper end of the inner roller shaft extends above the cavity rotating shaft, and a transmission gear is fixedly provided on the upper end of the inner roller shaft, and an inner gear ring is fixedly provided above the cavity rotating shaft, and the transmission gear is meshed with the inner side of the inner gear ring, so that when the cavity rotating shaft drives the inner roller shaft to revolve, the transmission gear can rotate on the inner gear ring, thereby forming a state in which the inner roller shaft drives the filter screen to rotate.

[0008] Furthermore, a dense hole area 1 is provided on the inner roller shaft in the section opposite to the filter screen; the air intake assembly comprises: a reciprocating rod, the cavity tube is a tubular structure with an open upper end and a sealed lower end, and the cavity tube is inserted into the inner roller shaft from the upper end of the inner roller shaft, and a dense hole area 2 is provided on the side of the cavity tube opposite to the through groove; a piston, the piston is provided in the area near the upper end of the cavity tube, and the lower end of the piston is fixed in the cavity tube by a return spring, a reciprocating rod is fixed on the upper end of the cavity tube, a corrugated ring is fixed on the upper part of the cavity rotating shaft, and the corrugated ring The lower surface is provided with a convex part and a concave part. When the cavity rotating shaft revolves, the reciprocating rod can move along the corrugated ring, so that the convex part of the corrugated ring presses down the reciprocating rod. When the reciprocating rod reaches the concave part, the reset spring rebounds to make the piston move upward; an air inlet, the air inlet is arranged on one side of the cavity tube, and an air inlet check valve is provided in the air inlet. When the piston moves upward, the air inlet check valve opens to allow CO2 to enter the cavity tube; an exhaust check valve, the exhaust check valve is arranged in the cavity tube at a position lower than the air inlet, so that when the piston moves downward, CO2 pushes open the exhaust check valve and generates positive pressure on the dense hole area 2.

[0009] Furthermore, the cavity cylinder and the inner roller shaft are connected by a bearing to reduce the wear of the cavity cylinder and the stirring blades; a limit rod is fixedly provided at the upper end of the cavity cylinder away from the center of the cavity rotating shaft, and an inner groove ring is fixedly provided above the cavity rotating shaft. When the inner roller shaft revolves around the limit rod, the limit rod slides in the inner groove ring to limit the rotation of the cavity cylinder, so that the dense hole area 2 is opposite to the through groove.

[0010] Furthermore, it also includes a fixed cover, which is located at the upper end of the cavity rotating shaft, and a through hole is opened on one side of the fixed cover. A slag discharge channel is fixed on the side of the fixed cover close to the through hole. The slag discharge channel is fixed to the upper surface of the cavity rotating shaft, and the flocs lifted by the spiral lifting auger enter the slag discharge channel and are discharged.

[0011] Furthermore, the outer surface of the filter screen is provided with ridges along the circumferential direction to limit the floccules on the filter screen from falling down.

[0012] Furthermore, an outer cover is provided above the cavity rotating shaft, and a CO2 inlet pipe is provided on one side of the outer cover for introducing CO2 generated by the production of silicon manganese alloy.

[0013] Furthermore, the driving assembly includes: a fourth umbrella wheel, the fourth umbrella wheel is fixed at a position close to the upper end of the cavity rotating shaft, and a third umbrella wheel is meshed on one side of the fourth umbrella wheel, a coaxial second umbrella wheel is provided on the third umbrella wheel, and a first umbrella wheel meshed with the second umbrella wheel is provided on the central axis of the spiral lifting auger; a driving motor for driving the spiral lifting auger to rotate is fixedly provided above the reaction tank.

[0014] On the other hand, the present invention also provides a low-carbon emission reduction method for treating pollutants in silicon-manganese alloy production, comprising the following steps:

[0015] Step 1: The wastewater generated by the silicon-manganese alloy production is filtered through a grid and then passed into a primary sedimentation tank for sedimentation to obtain a supernatant;

[0016] Step 2: passing the supernatant in step 1 into a reaction tank through a wastewater inlet pipe, using a heavy metal scavenger to react with the wastewater in the reaction tank to obtain floccules and secondary waste liquid;

[0017] Step 3: sending the secondary waste liquid obtained in step 2 into an anaerobic reactor and an aerobic reactor in sequence for biological reaction to obtain tertiary waste liquid;

[0018] Step 4: Pass the tertiary waste liquid into the secondary sedimentation tank for sedimentation, obtain the supernatant, and discharge it.

[0019] Furthermore, CO2 is introduced into the reaction tank, and the CO2 gas contacts and reacts with the wastewater solution to generate carbonates, so that the high-salt ions in the wastewater form solid insoluble inorganic carbonate compounds.

[0020] The present invention has the following beneficial effects:

[0021] 1. The low-carbon emission reduction equipment and carbon emission reduction method for pollutant treatment in silicon-manganese alloy production can separate flocs from wastewater through the filter net during the stirring process. When the stirring is completed, the separation of flocs from wastewater can also be completed, thereby speeding up the wastewater treatment process, and there is no need to equip subsequent filtering mechanisms, reducing the size of the equipment.

[0022] 2. The low-carbon emission reduction equipment and carbon emission reduction method for treating pollutants in the production of silicon-manganese alloy, introduces CO2 produced by the production of silicon-manganese alloy into the air intake component. This gas can contact the wastewater solution and react to generate carbonates, so that the high-salt ions in the wastewater form solids of insoluble inorganic carbonate compounds, further improving the cleanliness of the discharged wastewater. The introduced CO2 gas can also provide positive pressure to the flocs on the filter screen, ensuring that the flocs enter the cavity shaft and are lifted upward. Low-carbon emission reduction can also be achieved through the waste CO2.

[0023] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is an overall diagram of the present invention;

[0025] Figure 2 This is an appearance diagram of the heavy metal removal mechanism of the present invention;

[0026] Figure 3 It is a schematic diagram of the structure of the driving assembly of the present invention;

[0027] Figure 4 It is a schematic diagram of the internal structure of the reaction tank of the present invention;

[0028] Figure 5 is a distribution diagram of the stirring blades of the present invention;

[0029] Figure 6 This is a schematic diagram of the installation of the stirring blade of the present invention;

[0030] Figure 7 This is a schematic diagram of the installation of the inner roller shaft of the present invention;

[0031] Figure 8 It is a schematic diagram of the inner roller shaft cut away in the present invention;

[0032] Fig. 9 It is a cutaway view of the hollow shaft of the present invention;

[0033] Fig.10 For the present invention Fig. 9 Magnified image of area C;

[0034] Fig.11 For the present invention Fig. 9 Rear view of the

[0035] Fig.12 It is a cutaway view of the corrugated ring and the inner groove ring of the present invention;

[0036] Fig.13 For the present invention Figure 8 A magnified image of area A;

[0037] Fig.14 For the present invention Figure 8 A magnified view of area B;

[0038] Fig.15 An exploded view of the hollow cylinder and the inner roller of the present invention;

[0039] Fig.16 For the present invention Figure 5 Magnified view of area D.

[0040] In the figure, 1, primary sedimentation tank; 2, heavy metal removal mechanism; 100, reaction tank; 110, CO2 inlet pipe; 120, reagent feed pipe; 130, wastewater inlet pipe; 140, outer cover; 150, drain pipe; 170, inner gear ring; 180, inner groove ring; 190, corrugated ring; 200, drive assembly; 210, drive motor; 220, first umbrella wheel; 230, second umbrella wheel; 240, third umbrella wheel; 250, fourth umbrella wheel; 300, cavity shaft; 310, fixed cover; 320, slag discharge channel; 330, through groove; 400, stirring blade Plate; 410, first stirring rod; 420, filter screen; 421, ridge; 430, outer roller; 440, inner roller; 441, transmission gear; 442, dense hole area one; 450, second stirring rod; 600, air intake assembly; 610, cavity cylinder; 611, dense hole area two; 620, air inlet; 630, limit rod; 640, reciprocating rod; 650, piston; 660, exhaust check valve; 670, air intake check valve; 680, reset spring; 700, spiral lifting auger; 3, anaerobic reactor; 4, aerobic reactor; 5, secondary sedimentation tank. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] In the description of the present invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inside", "all around" and the like indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0043] According to the following Figure 1-Figure 16 The present invention provides a low-carbon emission reduction device and a carbon emission reduction method for pollutant treatment in silicon-manganese alloy production, provided in an embodiment of the present invention.

[0044] On the one hand, if Figure 1The embodiment of the present invention provides a low-carbon emission reduction device for treating pollutants in silicon-manganese alloy production, comprising a primary sedimentation tank 1, a heavy metal removal mechanism 2, an anaerobic reactor 3, an aerobic reactor 4 and a secondary sedimentation tank 5. The wastewater generated by the silicon-manganese alloy production is first filtered through a grid and sent to the primary sedimentation tank 1 for sedimentation. The supernatant after sedimentation enters the heavy metal removal mechanism 2 to remove heavy metals, and then enters the anaerobic reactor 3 and the aerobic reactor 4 for denitrification, nitrification, phosphorus absorption, and BOD removal, and then is discharged into the secondary sedimentation tank 5 for secondary sedimentation.

[0045] Combination Figure 2 and Figure 3 As shown, the heavy metal removal mechanism 2 includes a reaction tank 100, a cavity rotating shaft 300 and a stirring blade 400. The reaction tank 100 serves as a reaction site for wastewater and a heavy metal scavenger. A wastewater inlet pipe 130 and a reagent feed pipe 120 are arranged at the upper end of the reaction tank 100. The reagent feed pipe 120 is used to feed the heavy metal scavenger. The heavy metal ions in the wastewater react with the heavy metal scavenger to generate water-insoluble polymer chelated salts and form flocs.

[0046] Combination Figure 4 and Figure 5 As shown, the cavity rotating shaft 300 is arranged in the central inner area of ​​the reaction tank 100, the stirring blade 400 is arranged on the outer side of the cavity rotating shaft 300, and a plurality of stirring blades 400 are distributed along the axial direction of the cavity rotating shaft 300. When the cavity rotating shaft 300 rotates, the stirring blades 400 can be driven to rotate, so that the stirring blades 400 can mix the heavy metal scavenger with the wastewater, accelerate the reaction between the two, and accelerate the formation of flocs.

[0047] like Figure 6 A through groove 330 is provided on the side of the cavity rotating shaft 300 in an area opposite to the stirring blade 400 for the floccules to enter the cavity rotating shaft 300 .

[0048] like Figure 4-Figure 8As shown, each stirring blade 400 includes a first stirring rod 410 and a second stirring rod 450 fixed to the side of the cavity rotating shaft 300, and the first stirring rod 410 and the second stirring rod 450 are arranged side by side. An inner roller 440 is provided between one end of the first stirring rod 410 and the second stirring rod 450 close to the cavity rotating shaft 300, and an outer roller 430 is provided between the other ends. The inner roller 440 can rotate and drive the filter screen 420 to rotate, so as to make the floccules on the filter screen 420 gradually move along the radial direction of the reaction tank 100. Gradually approaches the cavity rotating shaft 300 and enters the cavity rotating shaft 300 through the through groove 330; in the present embodiment, when the cavity rotating shaft 300 drives the filter screen 420 to rotate, the side of the filter screen 420 facing the wastewater can filter out the flocs, so that the flocs remain on the surface of the filter screen 420, and when the inner roller 440 rotates, it can drive the filter screen 420 to rotate along the inner roller 440 and the outer roller 430, so that the flocs remaining on the surface of the filter screen can enter the through groove 330 and enter the cavity rotating shaft 300.

[0049] Combination Figure 7 Preferably, a ridge 421 is provided on the outer surface of the filter screen 420 along the circumferential direction to limit the flocs on the filter screen 420 from falling down.

[0050] A spiral lifting auger 700 is also provided, and the spiral lifting auger 700 is located in the cavity rotating shaft 300. The rotation of the spiral lifting auger 700 can lift the flocs in the cavity rotating shaft 300 upward, so that the flocs can be lifted upward to be separated from the entire reaction tank 100; preferably, the spiral lifting auger 700 here has dense holes, so as to avoid lifting the wastewater upward and ensure that it only lifts the flocs.

[0051] In addition, it should be noted that, when the spiral lifting auger 700 rotates, it can generate negative pressure around it, so that the flocs in the through groove 330 can be sucked into the cavity shaft 300 .

[0052] Combination Figure 7 and Figure 8As shown, furthermore, since the negative pressure generated when the above-mentioned spiral lifting auger 700 rotates is limited, in order to prevent the flocs in the area opposite to the through groove 330 from being unable to enter the cavity shaft 300 after the filter screen 420 reaches the position of the through groove 330, and continue to remain on the surface of the filter screen 420, an air intake component 600 is also provided here. The air intake component 600 is located in the inner roller 440, and the air intake component 600 is used to press the CO2 generated by the production of silicon manganese alloy, and make the CO2 spray out from the area opposite to the through groove 330 of the inner roller 440, thereby providing positive pressure to the flocs on the filter screen 420 passing through the through groove 330 area, so that the flocs on the filter screen 420 facing the through groove 330 can enter the cavity shaft 300 due to the positive pressure, ensuring that the flocs on the filter screen 420 can enter the cavity shaft 300 when the filter screen 420 passes through the through groove 330.

[0053] Therefore, in the low-carbon emission reduction equipment for treating pollutants in the production of silicon-manganese alloy provided in the embodiment of the present invention, the filter screen 420 can separate the flocs from the wastewater during the stirring process, and when the stirring is completed, the separation of the flocs from the wastewater can also be completed, thereby speeding up the wastewater treatment process, and there is no need to be equipped with a subsequent filtering mechanism, reducing the volume of the equipment. In addition, the introduced CO2 gas can contact the wastewater solution and react to generate carbonates, so that the high-salt ions in the wastewater form solid insoluble inorganic carbonate compounds, further improving the cleanliness of the discharged wastewater.

[0054] like Figure 5 , Figure 9-12 As shown, a driving assembly 200 for driving the cavity shaft 300 and the spiral lifting auger 700 to rotate in opposite directions is provided above the cavity shaft 300. When the cavity shaft 300 rotates, the stirring blades 400 thereon can play a stirring role. When the spiral lifting auger 700 rotates, the flocs in the cavity shaft 300 can be lifted upward.

[0055] The upper end of the inner roller 440 extends to above the cavity rotating shaft 300, and a transmission gear 441 is fixedly provided at the upper end of the inner roller 440. An inner gear ring 170 is fixedly provided above the cavity rotating shaft 300. The transmission gear 441 is meshed with the inner side of the inner gear ring 170, so that when the cavity rotating shaft 300 drives the inner roller 440 to revolve, the transmission gear 441 can rotate on the inner gear ring 170, forming a state in which the inner roller 440 drives the filter screen 420 to rotate, and when the filter screen 420 rotates, the flocs and solid particles can be transported into the cavity rotating shaft 300.

[0056] Combination Figure 7-Figure 15 As shown, in order to achieve pressurized air intake of the above-mentioned air intake assembly 600, a dense hole area 442 is provided on the inner roller 440 in the section opposite to the filter screen 420. The air intake assembly 600 includes a reciprocating rod 640, a piston 650, an air inlet 620 and an exhaust check valve 660.

[0057] The cavity tube 610 is a tubular structure with an open upper end and a sealed lower end. The cavity tube 610 is inserted into the inner roller shaft 440 from the upper end of the inner roller shaft 440. The cavity tube 610 revolves with the inner roller shaft 440 but does not rotate with the inner roller shaft 440. A dense hole area 2 611 is provided on the side of the cavity tube 610 opposite to the through groove 330. Therefore, when the cavity tube 610 takes in air from the upper end, the gas can be discharged toward the through groove 330 through the dense hole area 2 611.

[0058] The piston 650 mentioned above is arranged in the area near the upper end of the cavity tube 610, and the lower end of the piston 650 is fixed in the cavity tube 610 by a return spring 680. A reciprocating rod 640 is fixed at the upper end of the cavity tube 610, and a waveform ring 190 is fixed above the cavity rotating shaft 300. The lower surface of the waveform ring 190 is provided with a convex portion and a concave portion. The air inlet 620 is arranged on one side of the cavity tube 610, and an air inlet check valve 670 is provided in the air inlet 620. When the piston 650 moves upward, the air inlet check valve 670 opens to allow CO2 to enter the cavity tube 610. The exhaust check valve 660 is arranged in the cavity tube 610 at a position lower than the air inlet 620.

[0059] In this embodiment, when the cavity shaft 300 revolves, the reciprocating rod 640 can move along the waveform ring 190, so that the convex portion of the waveform ring 190 presses down the reciprocating rod 640, so that the piston 650 can move downward, and when the piston 650 moves upward, the air intake check valve 670 can be opened, so that CO2 can enter the cavity tube 610 from the air inlet 620. When the reciprocating rod 640 reaches the recessed portion, the return spring 680 rebounds, causing the piston 650 to move upward. When the piston 650 moves downward, CO2 pushes open the exhaust check valve 660 and generates positive pressure on the dense hole area 611, so that this positive pressure can ensure that the flocs on the filter screen 420 relative to the through groove 330 area enter the cavity shaft 300, and the flocs will not rotate out of the through groove 330 as the filter screen 420 rotates.

[0060] Preferably, since the inner roller 440 can rotate while the cavity tube 610 cannot rotate, in order to reduce the wear between the two, the cavity tube 610 and the inner roller 440 are connected via a bearing.

[0061] Furthermore, in order to prevent the cavity tube 610 from rotating together with the inner roller 440, a limit rod 630 is fixedly provided at the upper end of the cavity tube 610 on the side away from the center of the cavity rotating shaft 300, and an inner groove ring 180 is fixedly provided above the cavity rotating shaft 300. When the inner roller 440 revolves around the limit rod 630, the limit rod 630 slides in the inner groove ring 180 to limit the rotation of the cavity tube 610, so that the dense hole area 2 611 is opposite to the through groove 330.

[0062] Combination Figure 1As shown, in order to allow the material lifted upward by the spiral lifting auger 700 to be discharged from the reaction tank 100, a fixed cover 310 is also provided. The fixed cover 310 is located at the upper end of the cavity rotating shaft 300, and a through hole is opened on one side of the fixed cover 310. A slag discharge channel 320 is fixed on the side of the fixed cover 310 close to the through hole. The slag discharge channel 320 is fixed to the upper surface of the cavity rotating shaft 300, and the flocs lifted by the spiral lifting auger 700 are discharged by entering the slag discharge channel 320.

[0063] like Figure 1 In order to allow CO2 to enter each cavity tube 610, an outer cover 140 is provided above the cavity rotating shaft 300, and a CO2 inlet pipe 110 is provided on one side of the outer cover 140 for introducing CO2 generated by the production of silicon manganese alloy, so that CO2 diffuses in the entire outer cover 140, and the CO2 inlet pipe 110 is located in the outer cover 140, so that CO2 can be sucked into the CO2 inlet pipe 110.

[0064] Combination Figure 4 , Figure 5 and Fig.16 As shown, the above-mentioned driving assembly 200 includes a fourth umbrella wheel 250, which is fixed at a position near the upper end of the cavity rotating shaft 300, and a third umbrella wheel 240 is meshed on one side of the fourth umbrella wheel 250, and a coaxial second umbrella wheel 230 is provided on the third umbrella wheel 240, and a first umbrella wheel 220 meshing with the second umbrella wheel 230 is provided on the central axis of the spiral lifting auger 700; a driving motor 210 for driving the spiral lifting auger 700 to rotate is provided above the reaction tank 100.

[0065] In this embodiment, the drive motor 210 drives the spiral lifting auger 700 to rotate, and drives the cavity shaft 300 to rotate through the first umbrella wheel 220, the second umbrella wheel 230, the third umbrella wheel 240 and the fourth umbrella wheel 250. When the cavity shaft 300 rotates, it can cause the stirring blade 400 to stir, and when the spiral lifting auger 700 rotates, it can lift the flocs upward.

[0066] When in use (working), the wastewater generated by the silicon manganese alloy production is filtered through a grid and sent to a primary sedimentation tank 1 for sedimentation. The supernatant after sedimentation enters the heavy metal removal mechanism 2 to remove heavy metals. In this process, the wastewater is located in the reaction tank 100, the heavy metal collector is fed from the reagent feed pipe 120, and the CO2 waste gas enters the fixed cover 310 from the CO2 air inlet pipe 110. The drive motor 210 drives the spiral lifting auger 700 to rotate, and drives the cavity shaft 300 to rotate through the first umbrella wheel 220, the second umbrella wheel 230, the third umbrella wheel 240 and the fourth umbrella wheel 250. When the cavity shaft 300 rotates, it can make the stirring blade 400 stir, and when the spiral lifting auger 700 rotates, it can lift the flocs upward, and when the stirring blade 400 rotates, the transmission gear 441 on the inner roller shaft 440 can roll on the upper inner gear ring 170, The inner roller 440 rotates by itself. When it rotates by itself, the floccules filtered by the filter screen 420 can enter the cavity shaft 300 through the through groove 330. At the same time, when the cavity shaft 300 revolves, the reciprocating rod 640 can move along the wave ring 190, so that the convex part of the wave ring 190 presses the reciprocating rod 640 downward, so that the piston 650 can move downward. When the piston 650 moves upward, the intake check valve 670 can be opened, so that CO2 can be discharged. CO2 can enter the cavity tube 610 from the air inlet 620. When the reciprocating rod 640 reaches the recessed portion, the return spring 680 rebounds to make the piston 650 move upward. When the piston 650 moves downward, CO2 pushes open the exhaust check valve 660 and generates a positive pressure on the dense hole area 611. This positive pressure can ensure that the flocs on the filter screen 420 relative to the through groove 330 enter the cavity shaft 300, and the flocs will not rotate out of the through groove 330 as the filter screen 420 rotates.

[0067] The flocs entering the cavity rotating shaft 300 can be lifted upward by the spiral lifting auger 700 and discharged through the slag discharge channel 320. A drainage pipe 150 is also provided below the reaction tank 100. The water after heavy metal removal is sent to the anaerobic reactor 3 and the aerobic reactor 4 through the drainage pipe 150 for denitrification, nitrification, phosphorus absorption, and BOD removal, and then discharged into the secondary sedimentation tank 5 for secondary sedimentation.

[0068] On the other hand, an embodiment of the present invention further provides a low-carbon emission reduction method for pollutant treatment in silicon-manganese alloy production, comprising the following steps:

[0069] Step 1: passing the wastewater generated by the silicon-manganese alloy production into a primary sedimentation tank 1 for sedimentation to obtain a supernatant;

[0070] Step 2: The supernatant in step 1 is introduced into the reaction tank 100 through the wastewater inlet pipe 130, and a heavy metal scavenger is used in the reaction tank 100 to react with the wastewater to obtain floccules and secondary waste liquid;

[0071] Step 3: sending the secondary waste liquid obtained in step 2 into the anaerobic reactor 3 and the aerobic reactor 4 in sequence for biological reaction to obtain tertiary waste liquid;

[0072] Step 4: Pass the tertiary waste liquid into the secondary sedimentation tank 5 for sedimentation, obtain the supernatant, and discharge it.

[0073] Preferably, CO2 is introduced into the reaction tank 100, and the CO2 gas contacts and reacts with the wastewater solution to generate carbonates, so that the high-salt ions in the wastewater form solids of insoluble inorganic carbonate compounds.

[0074] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0075] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A low-carbon emission reduction device for treating pollutants in silicon-manganese alloy production, comprising a heavy metal removal mechanism (2), characterized in that: The heavy metal removal mechanism (2) comprises: A reaction tank (100), wherein the reaction tank (100) serves as a reaction site for wastewater and a heavy metal scavenger, and heavy metal ions in the wastewater react with the heavy metal scavenger to generate water-insoluble high molecular weight chelated salts and form floccules; A cavity rotating shaft (300), wherein the cavity rotating shaft (300) is arranged in a central area inside the reaction tank (100); A stirring blade (400), wherein the stirring blade (400) is arranged on the outside of the cavity rotating shaft (300), and a plurality of stirring blades (400) are distributed along the axial direction of the cavity rotating shaft (300), a through groove (330) is provided in an area of ​​the side of the cavity rotating shaft (300) opposite to the stirring blade (400), and each stirring blade (400) comprises a first stirring rod (410) and a second stirring rod (450) fixed to the side of the cavity rotating shaft (300), and the first stirring rod (410) and the second stirring rod (450) are connected to the first stirring rod (410) and the second stirring rod (450) are connected to the first stirring rod (410) and the second stirring rod (450) are connected to the first stirring rod (410) and the second stirring rod (450) are connected to the first stirring rod (410) and the second stirring rod (450) are connected to the first stirring rod (410) and the second stirring rod (450) are connected to the first stirring rod (410) and the second stirring rod (450) are connected to the first stirring rod (410) and the second stirring blade (450) are connected to the first stirring rod (410) and the second stirring blade (450) are connected to the first stirring rod (410) and the second stirring blade (450) are connected to the first stirring rod (410) and the second stirring blade (450) are connected to the second stirring blade (400) and the second stirring blade (40 ... The second stirring rod (450) is arranged side by side up and down, an inner roller (440) is provided between one end of the first stirring rod (410) and the second stirring rod (450) close to the cavity rotating shaft (300), and an outer roller (430) is provided between the other ends, the inner roller (440) being capable of self-rotation and driving the filter screen (420) to rotate, so as to make the floccules on the filter screen (420) gradually approach the cavity rotating shaft (300) along the radial direction of the reaction tank (100), and enter the cavity rotating shaft (300) through the through groove (330); A spiral lifting auger (700), wherein the spiral lifting auger (700) is located in the cavity rotating shaft (300), and the spiral lifting auger (700) can lift the flocculent matter in the cavity rotating shaft (300) upwards when rotating; An air intake assembly (600), the air intake assembly (600) being located inside the inner roller shaft (440), and being used to pressurize CO2 generated by the production of silicon-manganese alloy, and to eject the CO2 from the area of ​​the inner roller shaft (440) opposite to the through groove (330), so as to provide positive pressure to floccules on the filter screen (420) passing through the through groove (330), so that floccules on the filter screen (420) facing the through groove (330) enter the cavity rotating shaft (300); A driving assembly (200) is provided above the cavity rotating shaft (300) for driving the cavity rotating shaft (300) and the spiral lifting auger (700) to rotate in opposite directions; The upper end of the inner roller shaft (440) extends to above the cavity rotating shaft (300); a transmission gear (441) is fixedly provided at the upper end of the inner roller shaft (440); an inner gear ring (170) is fixedly provided above the cavity rotating shaft (300); the transmission gear (441) meshes with the inner side of the inner gear ring (170), so that when the cavity rotating shaft (300) drives the inner roller shaft (440) to revolve, the transmission gear (441) can rotate on the inner gear ring (170), thereby forming a state in which the inner roller shaft (440) drives the filter screen (420) to rotate.

2. The low-carbon emission reduction equipment for pollutant treatment in silicon-manganese alloy production according to claim 1, characterized in that: A dense hole area 1 (442) is provided on the inner roller (440) in a section opposite to the filter screen (420); The air intake assembly (600) comprises: A cavity tube (610), the cavity tube (610) being a tubular structure with an open upper end and a sealed lower end, and the cavity tube (610) being inserted into the inner roller shaft (440) from the upper end of the inner roller shaft (440), and a dense hole area 2 (611) being provided on a side of the cavity tube (610) opposite to the through groove (330); A piston (650), wherein the piston (650) is disposed in a region near the upper end of the cavity tube (610), and the lower end of the piston (650) is fixed in the cavity tube (610) via a return spring (680); a reciprocating rod (640) is fixedly disposed at the upper end of the cavity tube (610); a wave ring (190) is fixedly disposed above the cavity rotating shaft (300); a convex portion and a concave portion are disposed on the lower surface of the wave ring (190); when the cavity rotating shaft (300) revolves, the reciprocating rod (640) can move along the wave ring (190), so that the convex portion of the wave ring (190) presses down the reciprocating rod (640); when the reciprocating rod (640) reaches the concave portion, the return spring (680) rebounds, so that the piston (650) moves upward; An air inlet (620), the air inlet (620) being arranged on one side of the cavity tube (610), and having an air inlet check valve (670) therein, and the air inlet check valve (670) being opened when the piston (650) moves upward, allowing CO2 to enter the cavity tube (610); An exhaust check valve (660) is disposed in the cavity tube (610) at a position lower than the air inlet (620), so that when the piston (650) moves downward, CO2 pushes open the exhaust check valve (660) and generates positive pressure on the dense hole area 2 (611).

3. The low-carbon emission reduction equipment for pollutant treatment in silicon-manganese alloy production according to claim 2, characterized in that: The cavity cylinder (610) and the inner roller shaft (440) are connected via a bearing to reduce wear of the cavity cylinder (610) and the stirring blade (400); A limiting rod (630) is fixedly provided at the upper end of the side of the cavity cylinder (610) away from the center of the cavity rotating shaft (300), and an inner groove ring (180) is fixedly provided above the cavity rotating shaft (300). When the inner roller (440) revolves, the limiting rod (630) slides in the inner groove ring (180) to limit the rotation of the cavity cylinder (610), so that the dense hole area 2 (611) is opposite to the through groove (330).

4. The low-carbon emission reduction equipment for pollutant treatment in silicon-manganese alloy production according to claim 3 is characterized by: It also includes a fixed cover (310), the fixed cover (310) being located at the upper end of the cavity rotating shaft (300), and a through hole being provided on one side of the fixed cover (310), a slag discharge channel (320) being fixedly provided on a side of the fixed cover (310) close to the through hole, the slag discharge channel (320) being fixed to the upper surface of the cavity rotating shaft (300), and the flocs lifted by the spiral lifting auger (700) are discharged by entering the slag discharge channel (320).

5. The low-carbon emission reduction equipment for pollutant treatment in silicon-manganese alloy production according to claim 4, characterized in that: The outer surface of the filter screen (420) is provided with a ridge (421) along the circumferential direction to limit the floccules on the filter screen (420) from falling down.

6. The low-carbon emission reduction equipment for pollutant treatment in silicon-manganese alloy production according to claim 5, characterized in that: An outer cover (140) is provided above the cavity rotating shaft (300), and a CO2 inlet pipe (110) is provided on one side of the outer cover (140) for introducing CO2 generated by the production of silicon manganese alloy.

7. The low-carbon emission reduction equipment for pollutant treatment in silicon-manganese alloy production according to claim 6, characterized in that: The driving assembly (200) comprises: a fourth umbrella wheel (250), the fourth umbrella wheel (250) being fixed at a position close to the upper end of the cavity rotating shaft (300), and a third umbrella wheel (240) being meshed on one side of the fourth umbrella wheel (250), a coaxial second umbrella wheel (230) being provided on the third umbrella wheel (240), and a first umbrella wheel (220) meshing with the second umbrella wheel (230) being provided on the central axis of the spiral lifting auger (700); A driving motor (210) for driving the spiral lifting auger (700) to rotate is fixedly disposed above the reaction tank (100).

8. A low-carbon emission reduction method for treating pollutants in the production of silicon-manganese alloy, applied to the low-carbon emission reduction device for treating pollutants in the production of silicon-manganese alloy according to any one of claims 1 to 7, characterized in that: The following steps are involved: Step 1: The wastewater generated by the silicon-manganese alloy production is filtered through a grid and then passed into a primary sedimentation tank (1) for sedimentation to obtain a supernatant; Step 2: passing the supernatant in step 1 into the reaction tank (100) through the wastewater inlet pipe (130), and using a heavy metal capture agent to react with the wastewater in the reaction tank (100) to obtain floccules and secondary waste liquid; Step 3: sending the secondary waste liquid obtained in step 2 into the anaerobic reactor (3) and the aerobic reactor (4) in sequence for biological reaction to obtain tertiary waste liquid; Step 4: Pass the tertiary waste liquid into the secondary sedimentation tank (5) for sedimentation, obtain the supernatant, and discharge it.

9. A low-carbon emission reduction method for pollutant treatment in silicon-manganese alloy production according to claim 8, characterized in that: CO2 is introduced into the reaction tank (100), and the CO2 gas contacts and reacts with the wastewater solution to generate carbonates, so that the high-salt ions in the wastewater form solid insoluble inorganic carbonate compounds.

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