A smelting device with gas treatment for non-ferrous metal smelting

Abstract

This application relates to a smelting device with gas treatment for non-ferrous metal smelting, and relates to the field of metal smelting waste gas treatment. The device comprises a first treatment box connected to a smelting tank, an oxygen tank, and a recovery box. The first treatment box is connected to a pH meter and a stirring fan, and is filled with water. The oxygen tank is connected to the first treatment box and is equipped with a reverse valve. The recovery box is connected to the first treatment box. This device has the effect of preventing sulfur dioxide from being discharged into the air during the entire process and recovering it for reuse.

Description

Technical Field

[0001] The present application relates to the field of metal smelting waste gas treatment, and in particular to a smelting device with gas treatment for non-ferrous metal smelting. Background Art

[0002] During the production process of non-ferrous metal smelting, waste gas, waste water and waste residue are generated, which are all very polluting to the environment. The waste gas is mainly sulfur dioxide gas produced by heavy metal smelting and smoke containing heavy metal compounds.

[0003] In the related technology, the Chinese application document with application number CN202210188609.0 discloses an automated metal smelting equipment including a melting furnace, a weighing scale, a feeding assembly, an exhaust assembly, a lifting assembly, a rotating assembly, a spray gun and a lifting assembly. The melting furnace is detachably connected to a furnace cover; the weighing scale is connected to the melting furnace and is used to weigh the weight of the melting furnace; the feeding assembly and the exhaust assembly are both connected to the melting furnace, and the feeding assembly is used to feed the melting furnace, and the exhaust assembly is used to discharge the gas in the melting furnace; the lifting assembly is connected to the spray gun and is used to drive the lifting and lowering of the spray gun, and the spray gun is used to spray reducing gas and fuel into the melting furnace; the rotating assembly is connected to the lifting assembly, and the rotating assembly is used to drive the spray gun to rotate; the lifting assembly is used to lift the furnace cover. The exhaust assembly includes a first exhaust section and a second exhaust section. The first exhaust section is a pipe with a circular cross-section. One end of the first exhaust section extends to the outside of the room, and the other end extends to the second exhaust section. The second exhaust section is a pipe with a circular cross-section. One end of the second exhaust section is fixedly connected to the furnace cover by welding, and the other end of the second exhaust section is connected to the first exhaust section by a clamp-type flexible joint.

[0004] In summary, the inventors believe that the above-mentioned traditional metal smelting equipment directly passes the exhaust gas to the outdoors, and then purchases a special exhaust gas treatment device to discharge it after treatment; there is a problem that the exhaust gas treatment effect is not good and will pollute the air. Summary of the Invention

[0005] In order to recycle the waste gas generated by non-ferrous metal smelting and prevent it from being discharged into the atmosphere, the present application provides a smelting device with gas treatment for non-ferrous metal smelting.

[0006] The present application provides a smelting device with gas treatment for non-ferrous metal smelting, which adopts the following technical solution:

[0007] A smelting device with gas treatment for non-ferrous metal smelting includes a first treatment box connected to a smelting tank, an oxygen tank and a recovery box, wherein a pH meter and a stirring fan are connected to the first treatment box and the first treatment box is filled with water; the oxygen tank is connected to the first treatment box and a reverse valve is installed on the oxygen tank; and the recovery box is connected to the first treatment box.

[0008] By adopting the above technical solution, the water in the first treatment box can absorb the volatilized sulfur dioxide gas, so that the sulfur dioxide gas is converted into sulfurous acid in the water; at the same time, oxygen is introduced into the first treatment box, and under the oxidation of oxygen, the sulfurous acid can be converted into sulfuric acid, so that part of the sulfur dioxide discharged from the smelting metal is converted into sulfuric acid; the purpose of installing the stirring fan is to allow sulfur dioxide and oxygen to have a larger contact area with water in the water, thereby improving the conversion efficiency; after the pH meter detects that the acidity is qualified, the sulfuric acid in the first treatment box is discharged into the recovery box, and the sulfuric acid collected in the recovery box can be used for cleaning the smelting tank; therefore, during the entire process, sulfur dioxide is not discharged into the air and is recycled.

[0009] Optionally, a first grid plate is fixedly connected to one side of the first processing box, and a first gas permeability membrane is connected to the side of the first grid plate close to the interior of the first processing box; a first transmission box is connected to the side of the first grid plate facing away from the first processing box; and the first transmission box is connected to the second processing box.

[0010] By adopting the above technical solution, the function of the first gas permeable membrane is to enable the unabsorbed sulfur dioxide in the first treatment box to enter the first transmission box through the first gas permeable membrane; without affecting the absorption of the newly entered sulfur dioxide by the water in the first treatment box; the first grid plate is set for two purposes, one is to support the first gas permeable membrane, and the other is to allow the passage of sulfur dioxide.

[0011] Optionally, the second treatment box is filled with a sodium hydroxide aqueous solution or a sodium carbonate aqueous solution.

[0012] By adopting the above technical solution, the sodium hydroxide aqueous solution and the sodium carbonate aqueous solution can absorb sulfur dioxide, so that the sulfur dioxide that has not completely reacted in the first treatment box continues to enter the second treatment box and continues to be absorbed by the sodium hydroxide aqueous solution or the sodium carbonate aqueous solution in the second treatment box.

[0013] Optionally, the second processing box is cylindrical, and the first transfer box is connected to the hollow part of the second processing box; the second processing box is fixedly connected to the side close to the axis and the side away from the first transfer box with a second grid plate, and the side of the second grid plate close to the interior of the second processing box is connected to a second gas permeable membrane; the hollow part enclosed by the second processing box is completely closed on the side away from the first transfer box.

[0014] By adopting the above technical solution, the cylindrical design of the second treatment box ensures that the sulfur dioxide gas entering the second treatment box can only continuously enter the sodium hydroxide aqueous solution or the sodium carbonate aqueous solution in the second treatment box, so that the sodium hydroxide aqueous solution or the sodium carbonate aqueous solution can absorb the entering sulfur dioxide gas with the greatest probability.

[0015] Optionally, the second processing box is connected to a second transfer box on a side facing away from the first transfer box, and a recovery plate is slidably connected in the second transfer box.

[0016] By adopting the above technical solution, the design purpose of the second transfer box is that the sulfur dioxide gas that is not completely absorbed by the second treatment box enters the last process through the second transfer box, and the recovery plate can serve as the last device to absorb the sulfur dioxide gas to ensure that the sulfur dioxide gas does not leak out.

[0017] Optionally, the recovery board comprises a lime board.

[0018] By adopting the above technical solution, since lime can be used to absorb high concentrations of sulfur dioxide, using the lime plate as the last device to absorb sulfur dioxide can ensure complete absorption of sulfur dioxide, so that sulfur dioxide is not discharged into the air during the entire process.

[0019] Optionally, the recovery board further includes a hard shell, which is sleeved on the lime board, and a third grid plate is connected to a side of the hard shell close to the interior of the second transfer box.

[0020] By adopting the above technical solution, the third grid plate can, on the one hand, support the lime plate, and, on the other hand, facilitate the entry of sulfur dioxide gas into the lime plate.

[0021] Optionally, the bottom of the hard shell is rollingly connected to a roller.

[0022] By adopting the above technical solution and the design of the roller, the workers can save effort when pulling the recovery plate back and forth, which makes it convenient for the workers to replace the recovery plate.

[0023] Optionally, a sealing strip is fixedly connected to the periphery of the side wall of the hard shell in the direction in which the hard shell can slide out of the second transfer box.

[0024] By adopting the above technical solution and the design of the sealing strip, the sulfur dioxide gas entering the second transmission box can only enter the recovery plate and cannot overflow to the outside, thereby preventing the leakage of sulfur dioxide gas.

[0025] In summary, this application includes at least one of the following beneficial technical effects:

[0026] 1. The water in the first treatment box absorbs the volatilized sulfur dioxide gas, causing it to convert into sulfurous acid in the water. At the same time, oxygen is introduced into the first treatment box, and under the oxidation of oxygen, the sulfurous acid can be converted into sulfuric acid. The sulfuric acid in the first treatment box is discharged into the recovery box, and the collected sulfuric acid in the recovery box can be used to clean the smelting tank. In this process, sulfur dioxide is not discharged into the air and is recycled.

[0027] 2. Unabsorbed sulfur dioxide in the first treatment box can pass through the first gas permeable membrane into the first transmission connection box without affecting the absorption of newly entering sulfur dioxide by the water in the first treatment box. The first grid plate has two purposes: one is to support the first gas permeable membrane, and the other is to allow sulfur dioxide to pass through.

[0028] 3. The cylindrical design of the second treatment box ensures that the sulfur dioxide gas entering the second treatment box can only continuously enter the sodium hydroxide aqueous solution or the sodium carbonate aqueous solution in the second treatment box, so that the sodium hydroxide aqueous solution or the sodium carbonate aqueous solution can absorb the incoming sulfur dioxide gas with the greatest probability. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural diagram of an embodiment of the present application;

[0030] Figure 2 It is a schematic diagram for showing the internal structure of the first processing box and the first transfer box;

[0031] Figure 3 It is a schematic diagram for showing the internal structure of the second processing box and the second transfer box;

[0032] Figure 4 This is an exploded diagram intended to show the internal structure of the recovery board.

[0033] Explanation of the accompanying reference numerals: 1. smelting tank; 2. first processing box; 21. pH meter; 22. stirring fan; 221. motor; 23. first grid plate; 24. first gas permeable membrane; 25. water injection pipe; 3. oxygen tank; 31. reverse valve; 4. recovery box; 41. acid outlet pipe; 42. regulating pipe; 5. first transmission box; 51. connecting pipe; 6. second processing box; 61. second grid plate; 62. second gas permeable membrane; 7. second transmission box; 71. wheel groove; 8. recovery plate; 81. lime plate; 82. hard shell; 83. third grid plate; 84. roller; 85. sealing strip; 86. pull-out handle. DETAILED DESCRIPTION

[0034] The following is combined with Figure 1-4 This application is described in further detail.

[0035] The embodiment of the present application discloses a smelting device with gas treatment for non-ferrous metal smelting. Figure 1 A smelting device with gas treatment for non-ferrous metal smelting includes a first processing box 2, a first transmission box 5, a second processing box 6, a second transmission box 7 and a recovery plate 8 connected to the gas discharge of a smelting tank 1. The first processing box 2, the first transmission box 5, the second processing box 6 and the second transmission box 7 are connected in sequence; the recovery plate 8 is located in the second transmission box 7 and is slidably connected to the second transmission box 7.

[0036] When metal is smelted in the smelting tank 1, sulfur dioxide gas is discharged and enters the first processing box 2 along the gas discharge point, where the sulfur dioxide reacts with the substances in the first processing box 2; the unreacted sulfur dioxide continues to enter the second processing box 6 from the first transmission box 5 to react, and the unreacted sulfur dioxide in the second processing box 6 continues to enter the recovery plate 8 and is absorbed by the recovery plate 8; the sulfur dioxide is completely absorbed through three absorption steps, and the sulfur dioxide will not be discharged to the outside.

[0037] Reference Figure 2 The first treatment box 2 is in the shape of a rectangular parallelepiped and is filled with water. The inner wall of the first treatment box 2 is rotatably connected to a stirring fan 22, and the central axis key of the stirring fan 22 is connected to a motor 221; the inner wall of the first treatment box 2 is fixedly connected to a pH meter 21, and the first treatment box 2 is fixedly connected to an oxygen tank 3, and a reverse valve 31 is installed on the oxygen outlet pipe of the oxygen tank 3; the bottom of the side wall of the first treatment box 2 is fixedly connected to a recovery box 4 through a pipeline, and the recovery box 4 is fixedly connected to an acid outlet pipe 41 for discharging sulfuric acid and a regulating pipe 42 for adjusting the acid concentration; a water injection pipe 25 is welded to the first treatment box 2, and a switch is installed on the water injection pipe 25.

[0038] Reference Figure 2 A first mesh plate 23 is welded to the side of the first processing box 2 near the first transfer box 5. A first gas permeable membrane 24 is adhesively bonded to the side of the first mesh plate 23 near the interior of the first processing box 2. The first transfer box 5 is rectangular and fixedly connected to the first processing box 2, forming an integral unit.

[0039] When metal smelting begins, the motor 221, the pH meter 21 and the oxygen tank 3 are turned on. The rotation of the motor 221 drives the stirring fan 22 to rotate, and the stirring fan 22 stirs, so that the water in the first treatment box 2 circulates. After the sulfur dioxide gas enters the first treatment box 2, it mixes with water to form sulfurous acid; at this time, the oxygen discharged from the oxygen tank 3 enters the water, mixes evenly with the sulfurous acid under the rapid flow of water, and oxidizes the sulfurous acid to form sulfuric acid; the pH meter 21 displays the concentration of sulfuric acid in the first treatment box 2 in real time. When the sulfuric acid concentration in the water reaches 50%, the valve between the first treatment box 2 and the recovery box 4 is opened, and the sulfuric acid aqueous solution in the first treatment box 2 enters the recovery box 4. The sulfuric acid aqueous solution in the recovery box 4 can be used to clean the smelting tank 1, saving the use of the original smelting tank 1 cleaning agent and recycling the discharged sulfur dioxide; water is re-injected into the first treatment box 2 for the next round of sulfur dioxide absorption. The sulfur dioxide that is not completely absorbed by the first treatment box 2 enters the first transmission box 5 through the first gas permeation membrane 24 and then continues to enter the second treatment box 6 for exhaust gas absorption of sulfur dioxide.

[0040] Reference Figure 1 and Figure 3 A connecting pipe 51 is fixedly connected between the second treatment box 6 and the first transfer box 5, and the connecting pipe 51 is welded to the first transfer box 5 and the second treatment box 6. The second treatment box 6 is a cylindrical structure with a rectangular cylindrical exterior and a cylindrical interior. The hollow portion of the second treatment box 6 is connected to the connecting pipe 51, and the hollow portion of the second treatment box 6 is fully enclosed on the side facing away from the first transfer box 5. A caustic soda injection pipe is welded to the second treatment box 6, and a switch is installed on the caustic soda injection pipe. The second treatment box 6 is filled with sodium hydroxide aqueous solution. The cylindrical structure inside the second treatment box 6 is made of a second mesh panel 61, and the side of the second treatment box 6 near the second transfer box 7 is made of the second mesh panel 61. A second gas permeable membrane 62 is adhesively fixed to the side of the second mesh panel 61 near the interior of the second treatment box 6.

[0041] The sulfur dioxide gas coming out of the first transmission box 5 can enter the second treatment box 6 of the cylindrical structure from all angles, and since the hollow part of the second treatment box 6 is fully closed on the side facing away from the first transmission box 5, the sulfur dioxide gas can only enter the second treatment box 6 and mix with the sodium hydroxide aqueous solution in the second treatment box 6. The sodium hydroxide aqueous solution absorbs the sulfur dioxide gas; the unabsorbed sulfur dioxide gas passes through the second gas permeation membrane 62 and enters the recovery plate 8 through the second transmission box 7.

[0042] Reference Figure 4 The second transfer box 7 is in the shape of a rectangular parallelepiped, and the second transfer box 7 is fixedly connected to the second processing box 6 and is integrally formed; an opening is provided on one side wall of the second transfer box 7 for inserting or removing the recovery plate 8; a wheel groove 71 is provided on the inner wall of the bottom surface of the second transfer box 7.

[0043] Reference Figure 3 and Figure 4 The recovery plate 8 is a rectangular plate, and the recovery plate 8 can be made of a solid plate that can absorb sulfur dioxide gas; the recovery plate 8 of this embodiment includes a lime plate 81 and a hard shell 82, and the hard shell 82 on the outside of the recovery plate 8 is covered outside the lime plate 81. The hard shell 82 of this embodiment is an aluminum shell, and the hard shell 82 abuts against a side wall of the second transfer box 7 facing away from the second processing box 6; the hard shell 82 is open on the side close to the second transfer box 7, and is clamped with a third grid plate 83 with a mesh structure; the bottom surface of the hard shell 82 is rollingly connected to a plurality of equidistantly distributed rollers 84, and the rollers 84 are slidingly connected to the second transfer box 7 along the long side direction of the wheel groove 71; the hard shell 82 is bonded and fixed with a sealing strip 85 around one side wall of the recovery plate 8 in the sliding direction, and the sealing strip 85 is tightly abutted against the second transfer box 7; the hard shell 82 is welded and fixed with a pull-out handle 86 on one side wall of the recovery plate 8 in the sliding direction.

[0044] The sulfur dioxide gas overflowing from the second transfer box 7 can be completely absorbed by the recovery plate 8 made of lime plate 81; when the lime in the recovery plate 8 is completely reacted, the staff pulls out the recovery plate 8, and it is easy to pull out the recovery plate 8 under the drive of the roller 84; the recovery plate 8 is pulled out, and the third grid plate 83 is removed, and the lime plate 81 is replaced and reinserted into the second transfer box 7.

[0045] The implementation principle of a smelting device with gas treatment for non-ferrous metal smelting in an embodiment of the present application is as follows: when metal is smelted in the smelting tank 1, sulfur dioxide gas is discharged, the motor 221, the pH meter 21 and the oxygen tank 3 are turned on, and the sulfur dioxide gas enters the first treatment box 2 and mixes with water to generate sulfurous acid; at this time, the oxygen discharged from the oxygen tank 3 enters the water, and is evenly mixed with the sulfurous acid under the rapid flow of water, and the sulfurous acid is oxidized to generate sulfuric acid; the pH meter 21 displays the concentration of sulfuric acid in the first treatment box 2 in real time. When the concentration of sulfuric acid in the water reaches 50%, the valve between the first treatment box 2 and the recovery box 4 is opened, and the sulfuric acid aqueous solution in the first treatment box 2 enters the recovery box 4, and the recovery box 4 is filled with sulfuric acid. The aqueous sulfuric acid solution in the smelting tank 1 can be used to clean the smelting tank 1; the sulfur dioxide that is not completely absorbed by the first processing box 2 enters the first transmission box 5 through the first gas permeation membrane 24, and the sulfur dioxide gas coming out of the first transmission box 5 can only enter the second processing box 6 and mix with the sodium hydroxide aqueous solution in the second processing box 6, and the sodium hydroxide aqueous solution absorbs the sulfur dioxide gas; the sulfur dioxide gas that is not completely absorbed passes through the second gas permeation membrane 62 and enters the recovery plate 8 through the second transmission box 7; the sulfur dioxide gas can be completely absorbed by the recovery plate 8 made of lime board 81; when the lime in the recovery plate 8 is completely reacted, the staff will replace the lime board 81 and reinsert it into the second transmission box 7.

[0046] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A smelting device with gas treatment for non-ferrous metal smelting, characterized by: The invention comprises a first processing box (2), an oxygen tank (3) and a recovery box (4) connected to a smelting tank (1); a pH meter (21) and a stirring fan (22) are connected to the first processing box (2); the first processing box (2) is filled with water; the oxygen tank (3) is in communication with the first processing box (2), and a reverse valve (31) is installed on the oxygen tank (3); the recovery box (4) is in communication with the first processing box (2); A first grid plate (23) is fixedly connected to one side of the first processing box (2); a first gas permeable membrane (24) is connected to the side of the first grid plate (23) close to the interior of the first processing box (2); a first transmission box (5) is connected to the side of the first grid plate (23) facing away from the first processing box (2); and the first transmission box (5) is connected to the second processing box (6); The second processing box (6) is cylindrical, and the first transmission box (5) is connected to the hollow part of the second processing box (6); the second processing box (6) is fixedly connected to the side close to the axis and the side away from the first transmission box (5) with a second grid plate (61), and the side of the second grid plate (61) close to the interior of the second processing box (6) is connected to a second gas permeable membrane (62); the hollow part enclosed by the second processing box (6) is completely closed on the side away from the first transmission box (5).

2. The smelting device with gas treatment for non-ferrous metal smelting according to claim 1, characterized in that: The second treatment box (6) is filled with a sodium hydroxide aqueous solution or a sodium carbonate aqueous solution.

3. The smelting device with gas treatment for non-ferrous metal smelting according to claim 1, characterized in that: The second processing box (6) is connected to a second transfer box (7) on the side facing away from the first transfer box (5), and a recovery plate (8) is slidably connected in the second transfer box (7).

4. The smelting device with gas treatment for non-ferrous metal smelting according to claim 3, characterized in that: The recovery plate (8) comprises a lime plate (81).

5. The smelting device with gas treatment for non-ferrous metal smelting according to claim 4, characterized in that: The recovery plate (8) further comprises a hard shell (82), which is sleeved on the lime plate (81), and a third grid plate (83) is connected to one side of the hard shell (82) close to the interior of the second transmission box (7).

6. The smelting device with gas treatment for non-ferrous metal smelting according to claim 5, characterized in that: The bottom of the hard shell (82) is rotatably connected to a roller (84).

7. The smelting device with gas treatment for non-ferrous metal smelting according to claim 5, characterized in that: The hard shell (82) is fixedly connected with a sealing strip (85) on the periphery of the side wall in the direction in which it can slide out of the second transfer box (7).

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