Acid-making and dust-removing device for lead smelting

Abstract

The invention discloses an acid-making and dust-removing device for lead smelting, and belongs to the related technical field of acid-making and dust-removing for lead smelting, the acid-making and dust-removing device for lead smelting comprises a mounting rack, the inner side of the mounting rack is sequentially provided with a heat pipe heat exchanger, a gravity settling chamber, an electric dust-removing chamber and a spraying chamber, and the bottom of the gravity settling chamber and the bottom of the electric dust-removing chamber are fixedly connected with humidifying boxes used for humidifying smoke dust; the bottom of the spraying chamber is fixedly connected with a dehumidification box used for reducing the humidity of the smoke dust, the bottom of the humidification box and the bottom of the dehumidification box are each provided with a discharge outlet, and a conveying auger is installed at the bottom of each discharge outlet; and smoke dust particles in a plurality of dust removal processes can be treated in a centralized manner, so that troubles caused to subsequent conveying and collection when dust is too dry or the humidity is too high are avoided.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of lead smelting and acid making dust removal, and particularly relates to a lead smelting and acid making dust removal device. BACKGROUND

[0002] The lead smelting and acid making process is a process of preparing sulfuric acid through purification, conversion and absorption of sulfur-containing flue gas generated by sintering and blast furnace reduction of lead ore. The composite pollutants formed by the mixed lead-containing dust and acid gas are not only the key hidden danger of production safety, but also the key object of environmental protection management. Therefore, an efficient and stable dust removal device is an indispensable core equipment for the lead smelting and acid making production line.

[0003] However, the current lead smelting and acid making dust removal device basically needs to be processed through multiple steps when processing dust-containing flue gas. After being processed through different settling steps, the humidity of the emitted dust particles is different. For example, the humidity of the dust particles after settling is low, and the humidity of the particles after spraying is high. Therefore, when uniformly conveying, the particles with low humidity are easy to form a suspended layer, which causes the conveying auger to fail to send some particles outward, and the dust particles with high humidity are easy to adhere to the inner wall of the auger due to high water content and increased viscosity, which also fails to completely send them outward, thereby affecting the dust removal process. SUMMARY

[0004] The application provides a lead smelting and acid making dust removal device, which can solve the technical problem of poor conveying effect caused by different humidity of dust particles in the prior art.

[0005] A lead smelting and acid making dust removal device, comprising a mounting frame, a heat pipe heat exchanger, a gravity settling chamber, an electric dust removal chamber and a spraying chamber are sequentially mounted on the inner side of the mounting frame, a humidifying box for dust humidification is fixedly connected to the bottom of the gravity settling chamber and the electric dust removal chamber, and a dehumidifying box for reducing the humidity of dust is fixedly connected to the bottom of the spraying chamber, a discharge port is mounted on the bottom of the humidifying box and the dehumidifying box, and a conveying auger is mounted on the bottom of the discharge port.

[0006] As a further technical solution of the application, a solution box is fixedly installed on the top of the spraying chamber, a pump box is installed on one side of the solution box, a spraying ring pipe extending into the spraying chamber is fixedly installed outside the spraying chamber, and a conveying pipe is connected between the pump box and the spraying ring pipe.

[0007] As a further technical solution of the application, a fixing frame is fixedly connected to the bottom of the conveying auger, the fixing frame is arranged in a U shape, and the bottom surface is fixedly connected to the bottom of the mounting frame.

[0008] As a further technical solution of the present invention, the humidification box includes a box body, a feeding hopper is installed on the top of the box body, a baffle is fixedly installed on one side of the bottom of the feeding hopper, an exhaust fan is fixedly installed on one side of the box body, an installation frame is fixedly installed on the side of the box body near the exhaust fan, a dust filter is installed inside the installation frame, a pipe box is also fixedly installed on one side of the box body, the pipe box is located on top of the exhaust fan, and a conveying pipe is installed inside the pipe box. The conveying pipe is connected to the conveying pipe 2 through a connecting pipe. A direct spray pipe extending into the box body is installed on one side of the conveying pipe 1, and a curved spray pipe extending into the box body is installed on one side of the conveying pipe 2.

[0009] As a further technical solution of the present invention, the direct spray pipe is positioned directly below the feed hopper, and the spray nozzle of the curved spray pipe is positioned directly outside the dust filter.

[0010] As a further technical solution of the present invention, a ramp is fixedly connected to the top of the mounting frame, and a vibration motor for vibrating the dust filter is installed on the inner side of the ramp.

[0011] As a further technical solution of the present invention, the dehumidification box includes a box body two. A guide platform is installed inside the box body two, and a receiving plate is installed inside the box body two near the bottom of the guide platform. A hydraulic cylinder is installed on the outer side of the box body two and the outer side of the guide platform. A push plate is connected to the drive end of the hydraulic cylinder inside the box body two. A water collection tank is also installed on the outer side of the box body two. The water collection tank is located below the hydraulic cylinder. A water guide trough plate communicating with the water collection tank is fixedly installed on the bottom side of the receiving plate, and a discharge cylinder is fixedly connected to the bottom side of the receiving plate near the water guide trough plate.

[0012] As a further technical solution of the present invention, the inner side of the receiving plate is rotatably connected to a flap via a shaft, and a mesh plate is embedded on the inner side of the receiving plate near the flap. Sealing plates are installed on both sides of the top of the mounting groove on the receiving plate near the flap.

[0013] As a further technical solution of the present invention, the shaft passes through the outside of the second housing, and a flipping motor for driving the shaft is installed on the outside of the second housing. The water guide plate is directly below the mesh plate, and the feed cylinder is directly below the flipping plate.

[0014] As a further technical solution of the present invention, the bottoms of both the humidification box and the dehumidification box are inclined toward the direction in which the discharge port is located.

[0015] The beneficial effects of this invention are as follows: By setting up a humidification box, the flue gas undergoes preliminary settling treatment in the gravity settling chamber and the electrostatic precipitator chamber. The humidification of the humidification box promotes the rapid settling of particulate matter. The exhaust fan creates negative pressure, guiding the flue gas towards the direct injection pipe, thereby accelerating the humidification of the flue gas by the direct injection pipe. While increasing the settling speed of particulate matter, this effectively avoids the problem of particulate matter floating and being unable to enter the conveying auger. Furthermore, after humidifying the particulate matter, it effectively prevents the particulate matter from escaping from the gaps inside the conveying auger and prevents some extremely fine dust from forming a "suspended layer" that does not move with the spiral blades, thus avoiding a decrease in conveying efficiency.

[0016] A vibration motor is installed to vibrate the dust filter, preventing particulate matter from adhering to the surface of the dust filter. After the particulate matter is shaken up, it is quickly captured by the curved nozzle for humidification, further improving the humidification efficiency.

[0017] By setting up a dehumidification box and driving the corresponding push plate to move through two hydraulic cylinders, the moisture content of the sprayed dust particles can be greatly reduced, preventing the dust particles from accumulating on the inner wall of the conveying auger when the moisture content is too high.

[0018] With the help of the set water guide plate, water collection tank and flap, the squeezed water can be guided into the water collection tank through the water guide plate under the action of the mesh plate, so as to avoid water overflow and pollution. The flap can be flipped down to facilitate the discharge of dehumidified dust particles into the feed cylinder, so as to facilitate subsequent entry into the conveying auger for output processing. Attached Figure Description

[0019] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 This is a partial structural diagram of the present invention;

[0022] Figure 3 This is a cross-sectional view of the humidification box in this invention;

[0023] Figure 4 This is a cross-sectional view of the dehumidification box in this invention;

[0024] Figure 5 This is the present invention. Figure 3 Enlarged view of part a;

[0025] Figure 6 This is a diagram of the receiving plate in this invention.

[0026] In the diagram: 1. Mounting frame; 2. Heat pipe heat exchanger; 3. Gravity settling chamber; 4. Electrostatic precipitator chamber; 5. Spray chamber; 6. Solution tank; 7. Pump box; 8. Spray ring pipe; 9. Humidification box; 901. Box body one; 902. Feed hopper; 903. Exhaust fan; 904. Mounting frame; 905. Dust filter; 906. Pipe box; 907. Conveying pipe one; 908. Conveying pipe two; 909. Direct spray pipe; 910. Curved spray pipe ; 911, baffle; 912, inclined platform; 913, vibrating motor; 10, dehumidification box; 1001, box body two; 1002, water collection box; 1003, guide platform; 1004, hydraulic cylinder; 1005, push plate; 1006, receiving plate; 1007, discharge cylinder; 1008, water guide trough plate; 1009, flap plate; 1010, shaft; 1011, mesh plate; 1012, sealing plate; 11, conveying auger. Detailed Implementation

[0027] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] like Figures 1-6 As shown, a dust removal device for lead smelting acid production includes a mounting frame 1. A heat pipe heat exchanger 2, a gravity settling chamber 3, an electrostatic precipitator 4, and a spray chamber 5 are sequentially installed on the inner side of the mounting frame 1. Humidification boxes 9 for humidifying the flue gas are fixedly connected to the bottom of the gravity settling chamber 3 and the electrostatic precipitator 4, and a dehumidification box 10 for reducing the humidity of the flue gas is fixedly connected to the bottom of the spray chamber 5. Both the humidification box 9 and the dehumidification box 10 have discharge ports installed at their bottoms, and a conveying auger 11 is installed at the bottom of the discharge ports.

[0029] A solution tank 6 is fixedly installed on the top of the spray chamber 5, a pump box 7 is installed on one side of the solution tank 6, a spray ring pipe 8 extending into the outside of the spray chamber 5 is fixedly installed, and a delivery pipe is connected between the pump box 7 and the spray ring pipe 8.

[0030] Specifically, an alkaline spray solution is placed in the solution tank 6 and transported through the pump box 7 to the inside of the spray ring pipe 8. The spray ring pipe 8 sprays out the spray solution, which combines with the dust particles in the flue gas, neutralizing the acidity of the dust particles and increasing their weight, thereby causing them to settle downwards.

[0031] A fixing frame is fixedly connected to the bottom of the conveying auger 11. The fixing frame is U-shaped and its bottom surface is fixedly connected to the bottom of the mounting frame 1. The fixing frame supports the conveying auger 11 and keeps it stable.

[0032] The humidifier box 9 includes a box body 901. A feed hopper 902 is installed on the top of the box body 901. A baffle 911 is fixedly installed on one side of the bottom of the feed hopper 902. An exhaust fan 903 is fixedly installed on one side of the box body 901. A mounting frame 904 is fixedly installed on the side of the box body 901 near the exhaust fan 903. A dust filter 905 is installed inside the mounting frame 904. A pipe box 906 is also fixedly installed on one side of the box body 901. The pipe box 906 is located on top of the exhaust fan 903, and a delivery pipe 905 is installed inside the pipe box 906. 07. Conveying pipe 1 907 is connected to conveying pipe 2 908 via connecting pipe. A direct spray pipe 909 extending into the housing 1 901 is installed on one side of conveying pipe 1 907. A curved spray pipe 910 extending into the housing 1 901 is installed on one side of conveying pipe 2 908. The direct spray pipe 909 is directly below the feed hopper 902. The spray nozzle of the curved spray pipe 910 is directly opposite the outside of the dust filter 905. An inclined platform 912 is fixedly connected to the top of the mounting frame 904. A vibration motor 913 for vibrating the dust filter 905 is installed on the inner side of the inclined platform 912.

[0033] Specifically, after the flue gas enters the gravity settling chamber 3, the settled dust particles fall into the feed hopper 902. The exhaust fan 903 creates negative pressure, causing the dust particles to move towards the dust filter 905. The dust filter 905 blocks the dust particles, which then combine with the particles under the spray from the direct spray pipe 909 and the curved spray pipe 910. This humidifies the particles and accelerates their settling to the bottom of the housing 901. Vibration is provided by the vibration motor 913 to prevent particles from adhering to the surface of the dust filter 905.

[0034] The dehumidification box 10 includes a second box body 1001. A guide platform 1003 is installed inside the second box body 1001, and a receiving plate 1006 is installed inside the second box body 1001 near the bottom of the guide platform 1003. Hydraulic cylinders 1004 are installed on the outer side of both the second box body 1001 and the outer side of the guide platform 1003. A push plate 1005 is connected to the drive end of the hydraulic cylinder 1004 inside the second box body 1001. A water collection tank 1002 is also installed on the outer side of the second box body 1001, located below the hydraulic cylinders 1004. A water guide trough plate 1008, communicating with the water collection tank 1002, is fixedly installed on the bottom side of the receiving plate 1006. The bottom of the receiving plate 1006 is fixedly connected to the side of the water guide plate 1008, and the inner side of the receiving plate 1006 is rotatably connected to the flip plate 1009 through the shaft 1010. The inner side of the receiving plate 1006 is fitted with the mesh plate 1011 on the side of the flip plate 1009. Sealing plates 1012 are installed on both sides of the top of the mounting groove of the flip plate 1009 on the receiving plate 1006. The shaft 1010 passes through the outside of the second box 1001, and a flipping motor for driving the shaft 1010 is installed on the outside of the second box 1001. The water guide plate 1008 is directly below the mesh plate 1011, and the feeding cylinder 1007 is below the flip plate 1009.

[0035] Specifically, firstly, the push plate 1005 located on one side of the guide platform 1003 squeezes the settled dust particles to another push plate 1005, squeezing out the water in the dust particles and guiding them to the water collection tank 1002 through the water guide plate 1008. Then, the other push plate 1005 pushes the dehydrated dust particles to the flip plate 1009, and the flip plate 1009 flips downward to flip the particles into the feed cylinder 1007 for downward conveying.

[0036] The bottoms of both the humidification box 9 and the dehumidification box 10 are tilted towards the direction of the discharge port. Finally, the dust particles after humidification and dehumidification enter the conveying auger 11 through the discharge port and are conveyed outward.

[0037] A dust removal device for acid production in lead smelting involves first introducing flue gas into a heat pipe heat exchanger 2 for cooling. Then, the flue gas is conveyed to a gravity settling chamber 3 for coarse dust removal. Large particles settle due to gravity in the gravity settling chamber 3. The settled large particles then enter a humidification box 9 at the bottom of the gravity settling chamber 3. Simultaneously, the flue gas enters an electrostatic precipitator 4 for fine dust removal. Fine particles settle in the electrostatic precipitator 4, and the settled particles then enter the humidification box 9 at the bottom of the electrostatic precipitator 4. An alkaline spray solution is placed in a solution tank 6 and pumped through a pump box 7 into a spray ring pipe 8. The spray ring pipe 8 sprays the solution, which combines with the dust particles in the flue gas. This neutralizes the acidity of the dust particles and increases their weight, causing them to settle downwards.

[0038] The dust particles entering the humidification chamber 9 are humidified. The settled dust particles fall into the feed hopper 902, and the exhaust fan 903 exhausts the air to create negative pressure, causing the dust particles to move towards the dust filter 905. The dust filter 905 blocks the dust particles, and under the spray of the direct spray pipe 909 and the curved spray pipe 910, the dust particles combine with the dust particles, humidifying the dust particles and accelerating their settling to the bottom of the chamber 901.

[0039] Vibration is provided by the vibration motor 913 to lift particles adsorbed on the surface of the dust filter 905, which are then captured by the curved nozzle 910, preventing them from adsorbing onto the surface of the dust filter 905. The conveying pipe 907 can be connected to an alkaline liquid supply source, and the alkaline liquid is sprayed through the straight nozzle 909 and the curved nozzle 910 to neutralize the dust particles with acid and humidify them at the same time, increasing the weight of the particles and facilitating their rapid entry into the conveying auger 11.

[0040] Then, the dust particles treated in the electrostatic precipitator 4 continue to enter the interior of the spray chamber 5. Alkaline spraying liquid is placed in the solution tank 6 and transported through the pump box 7 to the interior of the spray ring pipe 8. The spray ring pipe 8 sprays out the spraying liquid, which combines with the dust particles in the flue gas, neutralizing the acidity of the dust particles and increasing their weight, thus causing them to settle downwards.

[0041] After settling, the dust particles enter the dehumidification chamber 10 and are received by the receiving plate 1006 under the guidance of the guide platform 1003. During dehumidification, the push plate 1005 located on one side of the guide platform 1003 squeezes the settled dust particles to another push plate 1005, squeezing out the moisture in the dust particles. The moisture is then guided to the water collection tank 1002 through the water guide plate 1008. Subsequently, the other push plate 1005 pushes the dehydrated dust particles onto the flip plate 1009. The flip plate 1009 flips downward to turn the particles into the feed cylinder 1007 for downward conveying.

[0042] A sealing plate 1012 is provided on the receiving plate 1006 to compensate for the gap between the flip plate 1009 and the receiving plate 1006 when it needs to be flipped, thus preventing material jamming. The flip plate 1009 only needs to be flipped downwards, so the sealing plate 1012 will not obstruct it.

[0043] Finally, the humidified and dehumidified dust particles all enter the conveying auger 11. They are conveyed to one end by the spiral blades inside the conveying auger 11. A collection device is set at the discharge point to collect the dust particles, which is convenient for subsequent recycling and treatment. The treated flue gas can be discharged to the outside of the spray chamber 5 by installing a negative pressure fan.

[0044] The above description is merely an example and illustration of the structure of the present invention. Those skilled in the art can make various modifications or additions to the specific embodiments described, or use similar methods to replace them, as long as they do not deviate from the structure of the invention or exceed the scope defined in the claims, all of which should fall within the protection scope of the present invention.

Claims

1. A dust removal device for acid production in lead smelting, comprising a mounting frame (1), wherein a heat pipe heat exchanger (2), a gravity settling chamber (3), an electrostatic precipitator (4), and a spray chamber (5) are sequentially mounted on the inner side of the mounting frame (1), characterized in that, The bottom of the gravity settling chamber (3) and the electrostatic precipitator chamber (4) are both fixedly connected to a humidifying box (9) for humidifying the flue gas, and the bottom of the spray chamber (5) is fixedly connected to a dehumidifying box (10) for reducing the humidity of the flue gas. The bottom of the humidifying box (9) and the dehumidifying box (10) are both equipped with an exhaust port, and a conveying auger (11) is installed at the bottom of the exhaust port.

2. The lead smelting acid production dust removal device according to claim 1, characterized in that, A solution tank (6) is fixedly installed on the top of the spray chamber (5), a pump box (7) is installed on one side of the solution tank (6), a spray ring pipe (8) extending into the outside of the spray chamber (5) is fixedly installed, and a delivery pipe is connected between the pump box (7) and the spray ring pipe (8).

3. The lead smelting acid production dust removal device according to claim 1, characterized in that, The bottom of the conveying auger (11) is fixedly connected to a fixed frame, which is U-shaped and whose bottom surface is fixedly connected to the bottom of the mounting frame (1).

4. The lead smelting acid production dust removal device according to claim 1, characterized in that, The humidification box (9) includes a box body (901), a feeding hopper (902) installed on the top of the box body (901), a baffle (911) fixedly installed on one side of the bottom of the feeding hopper (902), and an exhaust fan (903) fixedly installed on one side of the box body (901). A mounting frame (904) is fixedly installed on the side of the box body (901) near the exhaust fan (903). A dust filter (905) is installed inside the mounting frame (904). The box body (901) also has... A pipe box (906) is fixedly installed. The pipe box (906) is located on top of the exhaust fan (903). A first delivery pipe (907) is installed inside the pipe box (906). The first delivery pipe (907) is connected to a second delivery pipe (908) through a connecting pipe. A direct spray pipe (909) is installed on one side of the first delivery pipe (907) and extends into the first box (901). A curved spray pipe (910) is installed on one side of the second delivery pipe (908) and extends into the first box (901).

5. The lead smelting acid production dust removal device according to claim 4, characterized in that, The direct spray pipe (909) is directly below the feed hopper (902), and the spray nozzle of the curved spray pipe (910) is directly opposite the outside of the dust filter (905).

6. The lead smelting acid production dust removal device according to claim 5, characterized in that, The top of the mounting frame (904) is fixedly connected to a ramp (912), and a vibration motor (913) for vibrating the dust filter (905) is installed on the inner side of the ramp (912).

7. The lead smelting acid production dust removal device according to claim 1, characterized in that, The dehumidification box (10) includes a second box body (1001), inside which a guide platform (1003) is installed, and a support plate (1006) is installed inside the second box body (1001) near the bottom of the guide platform (1003). Hydraulic cylinders (1004) are installed on the outer side of both the second box body (1001) and the outer side of the guide platform (1003), and the hydraulic cylinders (1004) are located inside the second box body (1001). A push plate (1005) is connected to the drive end. A water collection tank (1002) is also installed on the outer side of the second box (1001). The water collection tank (1002) is located below the hydraulic cylinder (1004). A water guide plate (1008) that communicates with the water collection tank (1002) is fixedly installed on one side of the bottom of the receiving plate (1006). A feed cylinder (1007) is fixedly connected to the bottom of the receiving plate (1006) on the side near the water guide plate (1008).

8. A lead smelting acid production dust removal device according to claim 7, characterized in that, The inner side of the receiving plate (1006) is rotatably connected to a flap (1009) via a shaft (1010), and a mesh plate (1011) is embedded on the inner side of the receiving plate (1006) near the flap (1009). Sealing plates (1012) are installed on both sides of the top of the mounting groove of the receiving plate (1006) near the flap (1009).

9. A lead smelting acid production dust removal device according to claim 8, characterized in that, The shaft (1010) passes through the outside of the second box (1001), and a flipping motor for driving the shaft (1010) is installed on the outside of the second box (1001). The water guide plate (1008) is directly below the mesh plate (1011), and the feed cylinder (1007) is directly below the flip plate (1009).

10. A lead smelting acid production dust removal device according to claim 1, characterized in that, The bottoms of both the humidification box (9) and the dehumidification box (10) are tilted towards the direction in which the discharge port is located.

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