Tail gas purification device for smelting of closed industrial silicon submerged arc furnace

Abstract

The utility model discloses a tail gas purification device for smelting of a closed industrial silicon submerged arc furnace, and relates to the technical field of silicon iron smelting. The device comprises a purification tank, a feeding assembly is arranged on the lower portion in the purification tank, a heat exchange assembly is arranged at the center position in the purification tank, and a drying assembly is further arranged at the top of the purification tank. The U-shaped frame and the feeding pipe are driven by the driving rod to rotate, tail gas in the submerged arc furnace is evenly conveyed into the purification tank through the rotating feeding pipe, the problem that in the prior art, even feeding is not convenient to conduct is solved, the U-shaped frame drives the washing pipe to rotate in a reciprocating mode, and the washing effect is good. A filter screen and a coiled pipe in the heat exchange box are washed and cleaned through a washing pipe and a high-pressure spray head, so that the problem that self-cleaning of a heat exchange structure is inconvenient in the prior art is solved, and meanwhile exhaust gas of the purification tank is dried through a folded plate and a water absorption filler in the drying assembly; the problem that in the prior art, treated tail gas is inconvenient to dry is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of ferrosilicon smelting, and particularly relates to a tail gas purification device for closed industrial silicon submerged arc furnace smelting. Background Technique

[0002] Silicon is a common non-metallic element, which usually exists in the form of complex silicates or silicon dioxide in nature and is widely used in fields such as semiconductors, composite materials, and agriculture. In the industrial preparation process of silicon, a submerged arc furnace is usually used to smelt raw materials to obtain intermediate products of silicon. However, a large amount of high-temperature dust-containing tail gas is generated during the use of the submerged arc furnace. In order to avoid environmental pollution caused by the high-temperature dust-containing tail gas, a tail gas cooling and dust removal device is generally used to treat it;

[0003] The document with the publication number of CN118111248A discloses a submerged arc furnace tail gas treatment device and its use method, including a treatment pipe, a pipe tail sleeve, a pipe head sleeve, and an expansion joint. The tail of the treatment pipe is threadedly connected with the pipe tail sleeve, and the head of the treatment pipe is threadedly connected with the pipe head sleeve. An expansion joint is sleeved on the outer wall of the upper middle part of the treatment pipe. A cooling box is installed on the outer wall of one side of the treatment pipe, and a heat preservation box is arranged on the opposite side of the cooling box. Both the cooling box and the heat preservation box are communicated with a heat exchange component. A disc-shaped water pipe is embedded in the chassis of the heat exchange component. The other port of the heat preservation box is also communicated with a water tank in the pipe head sleeve, and the water tank is connected with a spraying component. At the same time, the spraying component is erected directly above the air guiding component;

[0004] However, it still has the following disadvantages in actual use:

[0005] 1. In the above-mentioned submerged arc furnace tail gas treatment device, a tail gas pipe penetrates through the bottom of the side wall of the treatment pipe, and the tail gas pipe is arranged in an inclined structure. The bottom side wall of the end of the tail gas pipe located inside the treatment pipe is arranged below the heat exchange component. The high-temperature dust-containing tail gas in the submerged arc furnace is input into the treatment pipe through the tail gas pipe for cooling and dust removal. However, during use, it cannot ensure uniform delivery of the tail gas into the treatment pipe, resulting in uneven contact between the tail gas and the treatment liquid and the heat exchange component in the treatment pipe, thereby resulting in an unsatisfactory cooling and dust removal effect on the tail gas;

[0006] 2. In the above-mentioned submerged arc furnace tail gas treatment device, a disc-shaped water pipe is embedded in the chassis of the heat exchange component, and a lower purification plate and an upper purification plate are respectively embedded in the side walls at the upper and lower ends of the chassis. The heat in the tail gas is recovered through the disc-shaped water pipe to cool down the tail gas, and the tail gas is preliminarily filtered through the lower purification plate and the upper purification plate to screen out larger solid particles in the tail gas. However, during use, smaller solid particles in the tail gas may adhere to the outer side wall of the disc-shaped water pipe and the filter holes of the lower purification plate and the upper purification plate, thereby affecting the heat exchange efficiency of the disc-shaped water pipe and the filtering effect of the lower purification plate and the upper purification plate.

[0007] 3. In the above-mentioned submerged arc furnace tail gas treatment device, the other port of the heat preservation box is also connected to the water tank in the pipe head sleeve, and the water tank is connected to the spraying component. The hot water in the heat preservation box is introduced into the pipe head sleeve through the water tank to heat the pipe head sleeve, so as to dry the tail gas after cooling and dust removal through the heated pipe head sleeve. However, during use, it cannot remove the moisture in the tail gas, resulting in excessive moisture content in the discharged tail gas, unsatisfactory treatment effect, and waste of water resources.

[0008] Therefore, we provide a tail gas purification device for closed industrial silicon submerged arc furnace smelting to solve the above problems. Utility Model Content

[0009] The purpose of the present utility model is to provide a tail gas purification device for closed industrial silicon submerged arc furnace smelting. By driving the rod to drive the U-shaped frame and the feed pipe to rotate, and through the rotating feed pipe, the tail gas in the submerged arc furnace is evenly transported into the purification tank, solving the problem of inconvenient uniform feeding in the existing one. By driving the U-shaped frame to drive the flushing pipe to rotate reciprocally, and through the flushing pipe and the high-pressure nozzle to flush and clean the filter screen and the serpentine pipe in the heat exchange box, solving the problem of inconvenient self-cleaning of the heat exchange structure in the existing one. At the same time, the exhaust gas of the purification tank is dried by the folding plate and the water-absorbing filler in the drying component, solving the problem of inconvenient drying of the treated tail gas in the existing one.

[0010] To solve the above technical problems, the present utility model is realized through the following technical solutions:

[0011] The present utility model is a tail gas purification device for closed industrial silicon submerged arc furnace smelting, including a purification tank. A heat preservation box is fixedly connected to the front end face of the purification tank. An inlet component is arranged below the interior of the purification tank. A heat exchange component is arranged at the central position inside the purification tank. A drying component is also arranged at the top of the purification tank.

[0012] The feeding assembly includes a first mounting frame fixedly connected to the lower part inside the purification tank. A rotating shaft passes through the center of the surface of the first mounting frame. A first bevel gear is sleeved on the top end of the rotating shaft. A U-shaped frame is welded to the bottom end of the rotating shaft. A feeding pipe is fixedly connected inside the U-shaped frame. One end of the feeding pipe is provided with a plurality of through holes at equal intervals along the circumferential direction of the feeding pipe. A driving rod is rotatably connected above the first mounting frame. A second bevel gear is sleeved on the rear end of the driving rod. The first bevel gear and the second bevel gear are meshed with each other;

[0013] The heat exchange assembly includes a heat exchange box fixedly connected inside the purification tank. A flushing pipe is rotatably connected above the heat exchange box. A plurality of high-pressure nozzles are fixedly communicated with each other at equal intervals along the axial direction of the flushing pipe. An installation rod is welded to the rear end of the flushing pipe. The rear end of the installation rod rotatably passes through the rear end face of the purification tank and is welded with a transmission gear. A U-shaped frame is movably connected to the rear end of the purification tank along the vertical direction. A rack is welded on one inner wall of the U-shaped frame. The rack is meshed and connected to one side of the transmission gear;

[0014] The drying assembly includes a drying box fixedly connected to the top of the purification tank. A plurality of folding plates are fixedly connected at equal intervals from top to bottom inside the drying box. A plurality of ventilation holes are evenly formed on the surface of the folding plates. Absorbent fillers are filled between adjacent folding plates. Heating boxes are fixedly connected to both outer walls of the drying box. A plurality of fifth connecting pipes penetrate through one outer wall of the heating box evenly. One end of the fifth connecting pipe penetrates through both outer walls of the drying box and extends into the drying box. The other end of the fifth connecting pipe extends into the heating box. A heat conducting plate is fixedly connected to the center position inside the heating box. A plurality of fins are evenly fixedly connected to both outer walls of the heat conducting plate.

[0015] A further setting of the present utility model is that the other end of the feeding pipe is fixedly communicated with a second connecting pipe through a first three-way joint. The bottom end of the second connecting pipe is communicated with a tail gas pipe through a first rotary joint. The front end of the tail gas pipe penetrates through the lower part of the front end face of the purification tank and extends to the outside front end of the purification tank.

[0016] A further setting of the present utility model is that a driving motor is fixedly connected to the front end face of the purification tank through a motor mounting frame. The output shaft of the driving motor is fixedly connected to the front end of the driving rod. A first bearing seat is fixedly connected to the top of the first mounting frame. The rear end of the driving rod rotatably passes through the first bearing seat.

[0017] A further setting of the present utility model is that a partition board is fixedly connected inside the purification tank. First connecting pipes penetrate through both outer walls of the purification tank. Both ends of the first connecting pipe extend below and above the partition board respectively. One end of the first connecting pipe located below the partition board is fixedly communicated with a gas collecting hood. A sewage discharge pipe penetrates through the bottom of the purification tank.

[0018] A further setting of the present utility model is as follows: A spraying assembly is further provided above the interior of the purification tank. The spraying assembly is located above the partition plate. The spraying assembly includes a second mounting frame fixedly connected above the interior of the purification tank. A water inlet pipe penetrates through the surface of the second mounting frame. One end of the water inlet pipe extends to the outside of one side of the purification tank. The other end of the water inlet pipe is fixedly communicated with an atomizer. A plurality of fourth connecting pipes are fixedly communicated at equal intervals on the outer side arm of the atomizer. One end of the plurality of fourth connecting pipes away from the atomizer is fixedly communicated with the same annular pipe. A plurality of atomizing nozzles are fixedly communicated at equal intervals on the annular pipe.

[0019] A further setting of the present utility model is as follows: A filter screen is fixedly connected below the interior of the heat exchange box. A plurality of serpentine pipes are fixedly connected at equal intervals above the interior of the heat exchange box. Both ends of the serpentine pipes extend into the interior of the heat preservation box.

[0020] A further setting of the present utility model is as follows: Second bearing seats are fixedly connected to the front and rear ends of the top of the heat exchange box. The front and rear ends of the flushing pipe are rotatably connected inside the second bearing seats. A water pump is fixedly connected inside the heat preservation box. The water outlet end of the water pump is fixedly communicated with a third connecting pipe. The top end of the third connecting pipe is fixedly communicated with the front end of the flushing pipe through a second rotary joint.

[0021] A further setting of the present utility model is as follows: A fixing plate is welded on the rear end face of the purification tank. A hydraulic cylinder is fixedly connected to the lower surface of the fixing plate. The piston shaft of the hydraulic cylinder is fixedly connected to the center position of the bottom of the U-shaped frame. Limiting rods are welded on both sides of the bottom of the U-shaped frame. The bottom ends of the limiting rods movably penetrate through the fixing plate and are threadedly sleeved with limiting nuts.

[0022] A further setting of the present utility model is as follows: A discharge pipe penetrates through the bottom of the drying box. The bottom end of the discharge pipe extends to above the interior of the purification tank. An exhaust pipe penetrates through the top of the drying box.

[0023] A further setting of the present utility model is as follows: A steam pipe penetrates through the top of the heat preservation box. The bottom end of the steam pipe extends to above the interior of the heat preservation box. The top end of the steam pipe is fixedly communicated with a sixth connecting pipe through a second three-way joint. One end of the sixth connecting pipe away from the second three-way joint penetrates through the outer wall of the other side of the drying box and extends into the interior of the drying box.

[0024] The present utility model has the following beneficial effects:

[0025] 1. The utility model drives the driving rod to rotate by starting the driving motor through the arrangement of the feeding component. The output shaft of the driving motor drives the driving rod to rotate, and the driving rod drives the first bevel gear and the rotating shaft to rotate through the second bevel gear, so that the rotating shaft drives the U-shaped frame and the feeding pipe to rotate. The exhaust gas is evenly distributed under the inner side of the purification tank through the rotating feeding pipe, which facilitates the even distribution of the exhaust gas, so that the exhaust gas can contact the heat exchange structure and the dust removal structure evenly and fully, thereby improving the overall heat exchange efficiency and dust removal efficiency.

[0026] 2. The utility model drives the U-shaped frame to perform a linear reciprocating motion in the vertical direction by starting the hydraulic cylinder through the arrangement of the heat exchange component. Under the meshing connection between the rack and the transmission gear, the mounting rod drives the flushing pipe to perform a reciprocating rotary motion. Then, the water pump is started, and under the action of the water pump, the water in the heat preservation box enters the flushing pipe, and the water flow is sprayed on the filter screen and the serpentine pipe through the high-pressure nozzle, realizing the self-cleaning function of the filter screen and the serpentine pipe, facilitating the self-cleaning of the heat exchange structure, avoiding the adhesion of solid particles in the exhaust gas on the heat exchange structure and affecting its heat exchange efficiency, and improving the overall heat exchange efficiency.

[0027] 3. The utility model condenses the moisture in the exhaust gas by using the folding plate and absorbs the condensed water droplets and other substances by using the water-absorbing filler, realizing the rapid drying of the exhaust gas after cooling and dust removal, thus facilitating the discharge of the treated exhaust gas and reducing the waste of water resources.

[0028] Of course, it is not necessary for any product implementing the utility model to achieve all the above advantages simultaneously. Description of the Drawings

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for the description of the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0030] Figure 1 It is a schematic diagram of the overall structure of an exhaust gas purification device for a closed industrial silicon submerged arc furnace smelting.

[0031] Figure 2 It is a front sectional view of the purification tank of the utility model.

[0032] Figure 3 It is a schematic diagram of the structure of the feeding component of the utility model.

[0033] Figure 4 It is a schematic diagram of the structure of the U-shaped frame of the utility model.

[0034] Figure 5 This is a schematic structural diagram of the feed pipe of the present utility model.

[0035] Figure 6 This is a schematic structural diagram of the heat exchange component of the present utility model.

[0036] Figure 7 This is an exploded view of the structure of the heat exchange box of the present utility model.

[0037] Figure 8 This is a schematic structural diagram of the flushing pipe of the present utility model.

[0038] Figure 9 This is a schematic structural diagram of the U-shaped frame of the present utility model.

[0039] Figure 10 This is a schematic structural diagram of the spraying component of the present utility model.

[0040] Figure 11 This is a front sectional view of the drying component of the present utility model.

[0041] Figure 12 This is a schematic structural diagram of the folding plate of the present utility model.

[0042] Figure 13 This is an installation schematic diagram between the heating box and the steam pipe of the present utility model.

[0043] Figure 14 This is a front sectional view of the heating box of the present utility model.

[0044] In the drawings, the list of components represented by each reference numeral is as follows:

[0045] 1 - Purification tank, 101 - Partition board, 102 - First connecting pipe, 103 - Gas collecting hood, 104 - Drain pipe, 2 - Insulation box, 3 - Feeding assembly, 301 - First mounting rack, 302 - U-shaped rack, 302a - Rotating shaft, 302b - First bevel gear, 303 - Feeding pipe, 303a - Through hole, 303b - First three-way joint, 303c - Second connecting pipe, 303d - First rotary joint, 304 - Tail gas pipe, 305 - Driving rod, 305a - Second bevel gear, 305b - Motor mounting rack, 305c - Driving motor, 305d - First bearing seat, 4 - Heat exchange assembly, 401 - Heat exchange box, 401a - Filter screen, 401b - Serpentine pipe, 402 - Flushing pipe, 402a - Second bearing seat, 402b - High-pressure spray head, 402c - Mounting rod, 402d - Transmission gear, 402e - Water pump, 402e-1 - Third connecting pipe, 402e-2 - Second rotary joint, 403 - U-shaped frame, 403a - Rack, 403b - Fixed plate, 403c - Hydraulic cylinder, 403d - Limiting rod, 403e - Limiting nut, 5 - Spraying assembly, 501 - Second mounting rack, 502 - Water inlet pipe, 503 - Atomizer, 504 - Fourth connecting pipe, 505 - Annular pipe, 506 - Atomizing spray head, 6 - Drying assembly, 601 - Drying box, 601a - Discharge pipe, 601b - Discharge pipe, 602 - Baffle plate, 602a - Vent hole, 603 - Water absorption filler, 604 - Heating box, 604a - Fifth connecting pipe, 604b - Heat conducting plate, 604c - Fins, 605 - Steam pipe, 605a - Second three-way joint, 605b - Sixth connecting pipe. Detailed implementation manners

[0046] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0047] Embodiment 1

[0048] Please refer to Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 and Figure 10As shown in the figure, this is the first embodiment of the present utility model. This embodiment provides an exhaust gas purification device for closed industrial silicon submerged arc furnace smelting, including a purification tank 1. A heat preservation box 2 is fixedly connected to the front end face of the purification tank 1. Below the interior of the purification tank 1, a feeding assembly 3 is provided. The feeding assembly 3 includes a first mounting frame 301, a U-shaped frame 302, a feeding pipe 303, and a driving rod 305. The driving rod 305 drives the U-shaped frame 302 and the feeding pipe 303 to rotate relative to the first mounting frame 301, and the high-temperature exhaust gas in the industrial silicon submerged arc furnace is input into the purification tank 1 through the rotating feeding pipe 303 for cooling and dust removal, solving the problem that the existing device is not convenient for evenly distributing the exhaust gas.

[0049] Specifically, the first mounting frame 301 is fixedly connected to the lower part inside the purification tank 1. A rotating shaft 302a penetrates through the center position of the surface of the first mounting frame 301. A first bevel gear 302b is sleeved on the top end of the rotating shaft 302a. The bottom end of the rotating shaft 302a is welded with a U-shaped frame 302. A feeding pipe 303 is fixedly connected inside the U-shaped frame 302. One end of the feeding pipe 303 is provided with a plurality of through holes 303a at equal intervals along the circumferential direction of the feeding pipe 303. Above the first mounting frame 301, a driving rod 305 is rotatably connected. A second bevel gear 305a is sleeved on the rear end of the driving rod 305. The first bevel gear 302b and the second bevel gear 305a are meshed with each other. The first mounting frame 301 is used to install structures such as the U-shaped frame 302 inside the purification tank 1. The U-shaped frame 302 is used to install the feeding pipe 303 and drive the feeding pipe 303 to rotate. The rotating shaft 302a is used to rotatably install the U-shaped frame 302 on the first mounting frame 301. The first bevel gear 302b is used to drive the rotating shaft 302a to rotate, thereby driving the U-shaped frame 302 to rotate. The feeding pipe 303 and the through holes 303a are used to distribute the exhaust gas below the interior of the purification tank 1. The driving rod 305 and the second bevel gear 305a are used to drive the first bevel gear 302b to rotate.

[0050] Furthermore, a partition 101 is fixedly connected inside the purification tank 1. First connecting pipes 102 penetrate through the outer walls on both sides of the purification tank 1. Both ends of the first connecting pipes 102 extend to the lower and upper sides of the partition 101 respectively. A gas collecting hood 103 is fixedly communicated with one end of the first connecting pipe 102 located below the partition 101. A sewage discharge pipe 104 penetrates through the bottom of the purification tank 1;

[0051] The other end of the feeding pipe 303 is fixedly communicated with a second connecting pipe 303c through a first three-way joint 303b. The bottom end of the second connecting pipe 303c is communicated with an exhaust pipe 304 through a first rotary joint 303d. The front end of the exhaust pipe 304 penetrates through the lower part of the front end face of the purification tank 1 and extends to the front side outside the purification tank 1;

[0052] On the front end face of the purification tank 1, a driving motor 305c is fixedly connected through a motor frame 305b. The output shaft of the driving motor 305c is fixedly connected to the front end of a driving rod 305. At the top of the first mounting frame 301, a first bearing seat 305d is fixedly connected. The rear end of the driving rod 305 rotatably penetrates through the first bearing seat 305d;

[0053] Above the interior of the purification tank 1, a spraying assembly 5 is further provided. The spraying assembly 5 is located above the partition plate 101. The spraying assembly 5 includes a second mounting frame 501 fixedly connected above the interior of the purification tank 1. A water inlet pipe 502 penetrates through the surface of the second mounting frame 501. One end of the water inlet pipe 502 extends to the outside of one side of the purification tank 1. The other end of the water inlet pipe 502 is fixedly communicated with an atomizer 503. A plurality of fourth connecting pipes 504 are fixedly communicated at equal intervals on the outer side arm of the atomizer 503. One ends of the plurality of fourth connecting pipes 504 away from the atomizer 503 are fixedly communicated with the same annular pipe 505. A plurality of atomizing nozzles 506 are fixedly communicated at equal intervals on the annular pipe 505.

[0054] The operation process of this embodiment is as follows: One end of the tail gas pipe 304 located outside the purification tank 1 is externally connected to the exhaust pipe system of a closed industrial silicon submerged arc furnace, so that the tail gas in the submerged arc furnace sequentially passes through the tail gas pipe 304, the second connecting pipe 303c and the feeding pipe 303 and enters the purification tank 1. At the same time of feeding, the driving motor 305c is started. The output shaft of the driving motor 305c drives the driving rod 305 to rotate. The driving rod 305 drives the first bevel gear 302b and the rotating shaft 302a to rotate through the second bevel gear 305a, so that the rotating shaft 302a drives the U-shaped frame 302 and the feeding pipe 303 to rotate. Through the rotating feeding pipe 303, the tail gas is evenly distributed below the inner side of the purification tank 1. Finally, the tail gas is cooled by the heat exchange structure below the partition plate 101. The cooled tail gas then enters above the partition plate 101 through the gas collecting hood 103 and the first connecting pipe 102. At this time, spraying water is provided to the atomizer 503 through the water inlet pipe 502. After being atomized by the atomizer 503, the water is sprayed out through the atomizing nozzles 506, thus realizing the spraying and dust removal of the tail gas and realizing the cooling and dust removal of the tail gas of the closed industrial silicon submerged arc furnace.

[0055] Embodiment 2

[0056] Please refer to Figure 1 、 Figure 6 、 Figure 7 、 Figure 8 and Figure 9As shown in the figure, this is the second embodiment of the present utility model. This embodiment is based on the previous embodiment, but is different from the previous embodiment in that: a heat exchange component 4 is provided at the central position inside the purification tank 1. The heat exchange component 4 includes a heat exchange box 401, a flushing pipe 402, and a U-shaped frame 403. The heat exchange box 401 is used to cool the tail gas, and the U-shaped frame 403 drives the flushing pipe 402 to rotate, so as to use the flushing pipe 402 to perform high-pressure flushing on the filter screen 401a and the serpentine pipe 401b inside the heat exchange box 401, solving the problem that it is not convenient to avoid the adhesion of solid particles in the tail gas on the filter screen 401a and the serpentine pipe 401b in the prior art.

[0057] Specifically, the heat exchange box 401 is fixedly connected inside the purification tank 1. The flushing pipe 402 is rotatably connected above the heat exchange box 401. Along the axial direction of the flushing pipe 402, a plurality of high-pressure nozzles 402b are fixedly communicated at equal intervals on the flushing pipe 402. The rear end of the flushing pipe 402 is welded with a mounting rod 402c. The rear end of the mounting rod 402c rotatably penetrates the rear end face of the purification tank 1 and is welded with a transmission gear 402d. The rear end of the purification tank 1 is movably connected with a U-shaped frame 403 along the vertical direction. A rack 403a is welded on one inner wall of the U-shaped frame 403. The rack 403a is meshed and connected to one side of the transmission gear 402d. The heat exchange box 401 is used to recover and reuse the heat in the tail gas. The flushing pipe 402 and the high-pressure nozzles 402b are used to provide high-pressure water flow into the heat exchange box 401, so as to realize the flushing and cleaning of the internal structure of the heat exchange box 401. The mounting rod 402c is used to drive the flushing pipe 402 to rotate, and the transmission gear 402d is used to drive the mounting rod 402c to rotate. The U-shaped frame 403 is used to mount the rack 403a and drive the rack 403a to perform a linear reciprocating motion in the vertical direction. The rack 403a is used to drive the transmission gear 402d to rotate.

[0058] Furthermore, a filter screen 401a is fixedly connected to the lower part inside the heat exchange box 401, and a plurality of serpentine pipes 401b are fixedly connected at equal intervals above the inside of the heat exchange box 401. Both ends of the serpentine pipe 401b extend into the inside of the insulation box 2;

[0059] Both the front and rear ends of the top of the heat exchange box 401 are fixedly connected with second bearing seats 402a. Both the front and rear ends of the flushing pipe 402 are rotatably connected inside the second bearing seats 402a. A water pump 402e is fixedly connected inside the insulation box 2. The water outlet end of the water pump 402e is fixedly communicated with a third connecting pipe 402e-1. The top end of the third connecting pipe 402e-1 is fixedly communicated with the front end of the flushing pipe 402 through a second rotary joint 402e-2;

[0060] A fixed plate 403b is welded to the rear end face of the purification tank 1. A hydraulic cylinder 403c is fixedly connected to the lower surface of the fixed plate 403b. The piston shaft of the hydraulic cylinder 403c is fixedly connected to the center position at the bottom of the U-shaped frame 403. Limiting rods 403d are welded to both sides at the bottom of the U-shaped frame 403. The bottom ends of the limiting rods 403d movably penetrate through the fixed plate 403b and are threadedly sleeved with limiting nuts 403e.

[0061] The remaining structures are the same as those in Embodiment 1.

[0062] The operation process of this embodiment is as follows: The tail gas inside the purification tank 1 enters the heat exchange box 401 after preliminary filtration through the filter screen 401a. The tail gas contacts the serpentine tube 401b inside the heat exchange box 401, and the water in the serpentine tube 401b is heated by the heat of the tail gas. The heat in the serpentine tube 401b is transferred to the inside of the heat preservation box 2, thereby realizing the recovery and reuse of the heat in the tail gas. At the same time, when it is necessary to clean the filter screen 401a and the serpentine tube 401b, the hydraulic cylinder 403c is started. The piston shaft of the hydraulic cylinder 403c drives the U-shaped frame 403 to perform a linear reciprocating motion in the vertical direction. Under the meshing connection between the rack 403a and the transmission gear 402d, the mounting rod 402c drives the flushing tube 402 to perform a reciprocating rotational motion. Then, the water pump 402e is started. Under the action of the water pump 402e, the water in the heat preservation box 2 enters the flushing tube 402, and the water flow is sprayed on the filter screen 401a and the serpentine tube 401b through the high-pressure nozzle 402b, realizing the self-cleaning function of the filter screen 401a and the serpentine tube 401b.

[0063] Embodiment 3

[0064] Please refer to Figure 1 、 Figure 11 、 Figure 12 、 Figure 13 and Figure 14 As shown in

[0065] Specifically, the drying box 601 is fixedly connected to the top of the purification tank 1. Inside the drying box 601, multiple baffle plates 602 are fixedly connected at equal intervals from top to bottom. A plurality of ventilation holes 602a are evenly formed on the surface of the baffle plates 602. Absorbent fillers 603 are filled between adjacent baffle plates 602. Heating boxes 604 are fixedly connected to the outer walls on both sides of the drying box 601. A plurality of fifth connecting pipes 604a penetrate through the outer wall on one side of the heating box 604 evenly. One end of the fifth connecting pipe 604a penetrates through the outer walls on both sides of the drying box 601 and extends into the interior of the drying box 601, and the other end of the fifth connecting pipe 604a extends into the interior of the heating box 604. A heat conduction plate 604b is fixedly connected to the central position inside the heating box 604. A plurality of fins 604c are evenly fixedly connected to the outer walls on both sides of the heat conduction plate 604b. The drying box 601 is provided for installing structures such as the baffle plates 602. The front cross-section of the baffle plate 602 is trapezoidal, which is welded by a horizontal plate and two inclined plates, increasing the surface in contact with the tail gas, so that the moisture in the tail gas can be fully condensed on the baffle plates 602. The absorbent fillers 603 are provided to absorb the condensed moisture. The heating box 604 is provided to heat the interior of the drying box 601. The fifth connecting pipe 604a is provided to connect the interiors of the heating box 604 and the drying box 601 to each other. The heat conduction plate 604b is provided to divide the interior of the heating box 604 into two sealed spaces, and in cooperation with the fins 604c, it is used to strengthen the heat transfer between the two sealed spaces.

[0066] Further, a discharge pipe 601a penetrates through the bottom of the drying box 601, and the bottom end of the discharge pipe 601a extends above the interior of the purification tank 1. A discharge pipe 601b penetrates through the top of the drying box 601;

[0067] A steam pipe 605 penetrates through the top of the heat preservation box 2, and the bottom end of the steam pipe 605 extends above the interior of the heat preservation box 2. The top end of the steam pipe 605 is fixedly communicated with a sixth connecting pipe 605b through a second three-way joint 605a. The end of the sixth connecting pipe 605b away from the second three-way joint 605a penetrates through the outer wall on the other side of the drying box 601 and extends into the interior of the drying box 601.

[0068] The remaining structures are the same as those in Embodiment 2.

[0069] The operation process of this embodiment is as follows: The steam in the incubator 2 enters the heating box 604 through the steam pipe 605 and the sixth connecting pipe 605b. Under the heat transfer action of the heat conducting plate 604b and the fins 604c, the heat in the steam is transferred to the air inside the drying box 601, realizing the heating of the tail gas inside the drying box 601. The tail gas after cooling and dust removal enters the drying box 601 through the discharge pipe 601a. The moisture in the tail gas condenses into water droplets on the folding plate 602, and the condensed water droplets are absorbed by the water absorbing filler 603, realizing the drying of the tail gas inside the drying box 601.

[0070] In the description of this specification, the description with reference to terms such as "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0071] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the present invention to the specific embodiments described. Obviously, many modifications and changes can be made according to the content of this specification. These embodiments are selected and specifically described in this specification to better explain the principle and practical application of the present invention, so that those skilled in the art can understand and utilize the present invention well. The present invention is only limited by the claims and their full scope and equivalents.

Claims

1. An off-gas purification device for smelting in a closed industrial silicon submerged arc furnace, including a purification tank (1), characterized in that: A heat preservation box (2) is fixedly connected to the front end face of the purification tank (1), and a feeding assembly (3) is arranged below the interior of the purification tank (1). A heat exchange assembly (4) is arranged at the central position inside the purification tank (1), and a drying assembly (6) is further arranged at the top of the purification tank (1); The feeding assembly (3) includes a first mounting frame (301) fixedly connected to the lower part inside the purification tank (1). A rotating shaft (302a) rotatably penetrates through the central position of the surface of the first mounting frame (301). A first bevel gear (302b) is sleeved at the top end of the rotating shaft (302a), and a U-shaped frame (302) is welded to the bottom end of the rotating shaft (302a). A feeding pipe (303) is fixedly connected inside the U-shaped frame (302), and a plurality of through holes (303a) are arranged at equal intervals along the circumferential direction of one end of the feeding pipe (303). A driving rod (305) is rotatably connected above the first mounting frame (301), and a second bevel gear (305a) is sleeved at the rear end of the driving rod (305). The first bevel gear (302b) and the second bevel gear (305a) are meshed with each other; The heat exchange assembly (4) includes a heat exchange box (401) fixedly connected inside the purification tank (1). A flushing pipe (402) is rotatably connected above the heat exchange box (401). A plurality of high-pressure nozzles (402b) are fixedly communicated with each other at equal intervals along the axial direction of the flushing pipe (402). An installation rod (402c) is welded to the rear end of the flushing pipe (402). The rear end of the installation rod (402c) rotatably penetrates through the rear end face of the purification tank (1) and is welded with a transmission gear (402d). A U-shaped frame (403) is movably connected to the rear end of the purification tank (1) in the vertical direction. A rack (403a) is welded to the inner wall of one side of the U-shaped frame (403), and the rack (403a) is meshed with one side of the transmission gear (402d); The drying assembly (6) includes a drying box (601) fixedly connected to the top of the purification tank (1). A plurality of folding plates (602) are fixedly connected at equal intervals from top to bottom inside the drying box (601). A plurality of ventilation holes (602a) are evenly formed on the surface of the folding plates (602), and a water-absorbing filler (603) is filled between adjacent folding plates (602). Heating boxes (604) are fixedly connected to the outer walls on both sides of the drying box (601). A plurality of fifth connecting pipes (604a) uniformly penetrate through the outer wall of one side of the heating box (604). One end of the fifth connecting pipe (604a) penetrates through the outer walls on both sides of the drying box (601) and extends into the interior of the drying box (601), and the other end of the fifth connecting pipe (604a) extends into the interior of the heating box (604). A heat conducting plate (604b) is fixedly connected to the central position inside the heating box (604), and a plurality of fins (604c) are uniformly fixedly connected to the outer walls on both sides of the heat conducting plate (604b).

2. The tail gas purification device for closed industrial silicon submerged arc furnace smelting according to claim 1, characterized in that, The other end of the feed pipe (303) is fixedly communicated with a second connecting pipe (303c) through a first three-way joint (303b), and the bottom end of the second connecting pipe (303c) is communicated with an exhaust pipe (304) through a first rotary joint (303d). The front end of the exhaust pipe (304) penetrates through the lower part of the front end face of the purification tank (1) and extends to the front end outside the purification tank (1).

3. The tail gas purification device for closed industrial silicon submerged arc furnace smelting according to claim 1, characterized in that, A driving motor (305c) is fixedly connected to the front end face of the purification tank (1) through a motor bracket (305b), and the output shaft of the driving motor (305c) is fixedly connected to the front end of a driving rod (305). A first bearing seat (305d) is fixedly connected to the top of the first mounting bracket (301), and the rear end of the driving rod (305) rotatably penetrates through the first bearing seat (305d).

4. The tail gas purification device for closed industrial silicon submerged arc furnace smelting according to claim 3, characterized in that, A partition (101) is fixedly connected inside the purification tank (1), and a first connecting pipe (102) penetrates through the outer walls on both sides of the purification tank (1). The two ends of the first connecting pipe (102) extend to the lower and upper sides of the partition (101) respectively, and one end of the first connecting pipe (102) located below the partition (101) is fixedly communicated with a gas collecting hood (103). A sewage discharge pipe (104) penetrates through the bottom of the purification tank (1).

5. The tail gas purification device for smelting in a closed industrial silicon submerged arc furnace according to claim 4, characterized in that, A spraying assembly (5) is further arranged above the inside of the purification tank (1), and the spraying assembly (5) is located above the partition (101). The spraying assembly (5) includes a second mounting bracket (501) fixedly connected above the inside of the purification tank (1), and a water inlet pipe (502) penetrates through the surface of the second mounting bracket (501). One end of the water inlet pipe (502) extends to the outside of one side of the purification tank (1), and the other end of the water inlet pipe (502) is fixedly communicated with an atomizer (503). A plurality of fourth connecting pipes (504) are fixedly communicated at equal intervals on the outer side arm of the atomizer (503), and one end of each of the plurality of fourth connecting pipes (504) far from the atomizer (503) is fixedly communicated with the same annular pipe (505). A plurality of atomizing nozzles (506) are fixedly communicated at equal intervals on the annular pipe (505).

6. The tail gas purification device for closed industrial silicon submerged arc furnace smelting according to claim 1, characterized in that, A filter screen (401a) is fixedly connected to the lower part inside the heat exchange box (401), and a plurality of serpentine pipes (401b) are fixedly connected at equal intervals above the inside of the heat exchange box (401). Both ends of the serpentine pipes (401b) extend to the inside of the heat preservation box (2).

7. The tail gas purification device for closed industrial silicon submerged arc furnace smelting according to claim 1, characterized in that, Second bearing seats (402a) are fixedly connected to the front and rear ends of the top of the heat exchange box (401), and the front and rear ends of a flushing pipe (402) are rotatably connected inside the second bearing seats (402a). A water pump (402e) is fixedly connected to the inside of the heat preservation box (2), and the water outlet end of the water pump (402e) is fixedly communicated with a third connecting pipe (402e-1). The top end of the third connecting pipe (402e-1) is fixedly communicated with the front end of the flushing pipe (402) through a second rotary joint (402e-2).

8. The tail gas purification device for closed industrial silicon submerged arc furnace smelting according to claim 1, characterized in that, A fixing plate (403b) is welded on the rear end face of the purification tank (1), and a hydraulic cylinder (403c) is fixedly connected to the lower surface of the fixing plate (403b). The piston shaft of the hydraulic cylinder (403c) is fixedly connected to the center position of the bottom of the U-shaped frame (403). Limiting rods (403d) are welded on both sides of the bottom of the U-shaped frame (403). The bottom ends of the limiting rods (403d) movably penetrate through the fixing plate (403b) and are threadedly sleeved with limiting nuts (403e).

9. The tail gas purification device for closed industrial silicon submerged arc furnace smelting according to claim 1, characterized in that, A discharge pipe (601a) penetrates through the bottom of the drying oven (601), and the bottom end of the discharge pipe (601a) extends above the interior of the purification tank (1). An exhaust pipe (601b) penetrates through the top of the drying oven (601).

10. The tail gas purification device for closed industrial silicon submerged arc furnace smelting according to claim 1, characterized in that, A steam pipe (605) penetrates through the top of the heat preservation box (2), and the bottom end of the steam pipe (605) extends above the interior of the heat preservation box (2). The top end of the steam pipe (605) is fixedly communicated with a sixth connecting pipe (605b) through a second three-way joint (605a). The end of the sixth connecting pipe (605b) far from the second three-way joint (605a) penetrates through the outer wall on the other side of the drying oven (601) and extends into the interior of the drying oven (601).

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