Secondary lead smelting waste gas treatment device

Abstract

The invention discloses a secondary lead smelting waste gas treatment device, and belongs to the technical field of secondary lead production. A secondary lead smelting waste gas treatment device comprises a smelting furnace, a material distributing furnace communicated with the smelting furnace is arranged at the smelting furnace, and a first-stage gas conveying pipe is arranged at the material distributing furnace; a treatment pond is arranged at the smelting furnace, and waste gas in the first-stage gas conveying pipe is introduced into a solution in the treatment pond; a secondary gas conveying pipe for conveying waste gas treated by a solution in the treatment tank is arranged at the treatment tank; a filtering unit for filtering waste gas conveyed by the second-stage gas conveying pipe and an exhaust pipe communicated with the filtering unit are arranged at the second-stage gas conveying pipe; and the filtering unit comprises two connecting discs and a filtering tank. According to the secondary lead smelting waste gas treatment device, waste gas is adsorbed through slaked lime, heavy metal particles in the waste gas can be separated, the content of heavy metal in the treated waste gas is greatly reduced, and the treated waste gas can be normally discharged.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of secondary lead production, and particularly relates to a secondary lead smelting waste gas treatment device. BACKGROUND

[0002] At present, most of the secondary lead enterprises in China mainly use traditional reverberatory furnace, blast furnace and cupola furnace smelting process, and the grid and lead mud are smelted together, basically without pretreatment process.

[0003] The patent document with the patent number CN104451161A discloses a method for smelting secondary lead at low temperature, and belongs to the technical field of secondary lead preparation. Alkaline environment is provided by sodium carbonate, and the secondary lead raw material and / or lead ore powder are used as the lead source and carbon is used as the reducing agent to perform alkaline smelting at 800-1100°C, so as to produce three products of crude lead or precious lead, smelting slag and flue gas. Most of the precious metals such as gold and silver enter the crude lead or precious lead. The crude lead produced by smelting is discharged into the bottom. The sulfur enters the smelting slag in the form of sodium sulfide. After the smelting slag is immersed in water, the filtrate is concentrated and crystallized in steps to obtain sodium carbonate and sodium sulfide products. The flue dust returns to the raw material after dust removal of the flue gas. The waste gas is directly discharged after being absorbed by the lye.

[0004] However, in the process of producing secondary lead by the above method, the waste gas generated by the recovery of the secondary lead is only absorbed by the alkali solution and then directly discharged. The secondary lead material contains a large amount of impurities, and some of the impurities contain heavy metal particles. These heavy metal particles are not easy to dissolve in the alkali solution, which leads to a high content of heavy metal particles in the discharged waste gas, and cannot meet the regulatory requirements of emission. Therefore, the present application proposes a secondary lead smelting waste gas treatment device. SUMMARY

[0005] The present application aims to provide a secondary lead smelting waste gas treatment device to solve the problem that the secondary lead material contains a large amount of impurities, some of which contain heavy metal particles. These heavy metal particles are not easy to dissolve in the alkali solution, which leads to a high content of heavy metal particles in the discharged waste gas, and cannot meet the regulatory requirements of emission.

[0006] To achieve the above-mentioned purpose, the present application provides the following technical scheme. A secondary lead smelting waste gas treatment device comprises a smelting furnace, a distribution furnace communicated with the smelting furnace is arranged at the smelting furnace, and a first gas conveying pipe is arranged at the distribution furnace. A treatment pool is arranged at the smelting furnace, and the waste gas in the first gas conveying pipe is introduced into the solution in the treatment pool. A second gas conveying pipe for conveying the waste gas treated by the solution in the treatment pool is arranged at the treatment pool. A filtering unit for filtering the waste gas conveyed by the second gas conveying pipe and an exhaust pipe communicated with the filtering unit are arranged at the second gas conveying pipe. The filter unit is provided with two connecting plates and a filter tank, the two connecting plates are respectively arranged at two ends of the filter tank, and the filter tank is filled with activated carbon for adsorbing exhaust gas.

[0007] Preferably, the treatment tank is provided with stirring units, the stirring units are two, and the two stirring units are symmetrically distributed about the center line of the treatment tank.

[0008] Preferably, the stirring unit comprises a stirring shaft rotatably arranged in the treatment tank, a blade mounted on the stirring shaft and located in the treatment tank, and a stirring motor connected with the stirring shaft for providing power for the stirring shaft.

[0009] Preferably, the treatment tank is provided with a top cover, the first gas conveying pipe penetrates the top cover, and the top cover is provided with inclinedly distributed dosing hoppers, and the dosing hoppers are provided with detachably connected sealing covers at the top.

[0010] Preferably, the second gas conveying pipe penetrates the top cover, and the second gas conveying pipe is detachably mounted on the top cover by bolts.

[0011] Preferably, the connecting plate is provided with a groove, and the groove is provided with a sealing gasket.

[0012] Preferably, the filter unit is provided with a first mounting unit and a first guide frame connected with the first mounting unit, the first guide frame is provided with a first vertical slot and a first horizontal slot, the first vertical slot and the first horizontal slot are vertically distributed, the first vertical slot is matched with the connecting plate, the depth of the first horizontal slot is greater than the thickness of the connecting plate, and the first mounting unit is connected with the second gas conveying pipe by a positioning pin.

[0013] Preferably, the filter unit is provided with a second mounting unit and a second guide frame away from the first mounting unit, the second guide frame is provided with a second vertical slot and a second horizontal slot in communication, the second vertical slot has the same size as the first vertical slot, and the second horizontal slot has the same size as the first horizontal slot, the second mounting unit is provided with an inner tube, an outer wall of one end of the inner tube is matched with an inner wall of the filter unit, and an inner wall of an end of the inner tube away from the filter unit is matched with an inner wall of the exhaust pipe.

[0014] Preferably, the inner tube is fixedly mounted on the second mounting unit, the second mounting unit is connected with the telescopic unit, the inner tube is provided with a first sealing groove and a second sealing groove, the first sealing groove is provided with a first sealing ring, the second sealing groove is provided with a second sealing ring, when the filter unit is mounted between the second gas conveying pipe and the exhaust pipe, an outer wall of the first sealing ring is attached to an inner wall of the filter unit, and an outer wall of the second sealing ring is attached to an inner wall of the exhaust pipe.

[0015] Preferably, the second mounting unit is provided with guide rods for limiting the movement of the second mounting unit, and the guide rods are arranged in a circular array around the center line of the second mounting unit.

[0016] Advantages: Firstly, the regenerative lead smelting waste gas treatment device provided by the application stores a weak alkaline solution in the treatment tank, the waste gas is mixed with the solution, the solution adsorbs part of the impurities in the waste gas, completes the preliminary treatment of the waste gas, the stirring units can be provided with two, the rotating directions of the two groups of blades are opposite when the two stirring units work, and the first gas conveying pipe is connected to the middle region of the treatment tank, so that the waste gas conveyed by the first gas conveying pipe can be fully mixed with the solution. The charging hopper can store slaked lime, the slaked lime can adsorb heavy metal impurities in the solution after being added to the treatment tank, at the same time, the slaked lime can react with acidic substances in the waste gas, and the acidic substances in the slaked lime can be separated, the heavy metal particles in the waste gas can be separated by adsorption of the slaked lime, the heavy metal content in the treated waste gas is greatly reduced, and the treated waste gas can be normally discharged.

[0017] Secondly, when the filter unit needs to be disassembled, the telescopic unit is started, the telescopic unit can drive the second mounting unit to move, when the second mounting unit is initially moved, the connecting disc on the right side of the filter unit is relatively displaced with the second mounting unit, the connecting disc on the right side enters the second vertical groove, at this time, the second mounting unit continues to move, can pull the filter unit clamped in the second vertical groove to move, until the connecting disc on the left side of the filter unit enters the first vertical groove, at this time, the filter unit can be vertically pulled out, the filter unit is taken out from between the first mounting unit and the second mounting unit, the taking-out work of the filter unit is completed, after the filter unit is cleaned and the activated carbon is replaced, the filter unit enters from the first vertical groove and the second vertical groove, then the telescopic unit is started, the filter unit is clamped by the first mounting unit and the second mounting unit, so that the taking-out and separation work of the filter unit is more convenient. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a structure schematic view of the regenerative lead smelting waste gas treatment device in the application; Figure 2 It is a side view of the regenerative lead smelting waste gas treatment device in the application; Figure 3 It is a schematic view of the internal structure of the regenerative lead smelting waste gas treatment device in the application; Figure 4 It is a schematic view of the internal structure of the regenerative lead smelting waste gas treatment device in the application; Figure 5 It is a schematic view of the internal structure of the regenerative lead smelting waste gas treatment device in the application; Figure 1 It is an enlarged structure schematic view of A in the application; Figure 6 For the present invention Figure 2 The enlarged structure schematic view at B in the present invention.

[0019] Explanation of reference signs: 1, smelting furnace; 2, distribution furnace; 3, first gas conveying pipe; 4, treatment pool; 5, stirring unit; 501, stirring shaft; 502, blade; 503, stirring motor; 6, top cover; 7, dosing funnel; 8, sealing cover; 9, second gas conveying pipe; 10, filtering unit; 1001, connecting disc; 1002, sealing gasket; 11, first mounting unit; 12, first guide frame; 1201, first vertical groove; 1202, first horizontal groove; 13, second mounting unit; 14, guide rod; 15, inner pipe; 16, telescopic unit; 17, exhaust pipe. DETAILED DESCRIPTION

[0020] The specific embodiments of the present invention are described in detail below, but it should be understood that the protection scope of the present invention is not limited by the specific embodiments.

[0021] As Figures 1-6 shown, the regenerated lead smelting waste gas treatment device provided by the embodiment of the present invention includes a smelting furnace 1, a distribution furnace 2 is arranged at the smelting furnace 1 and communicates with the smelting furnace 1, the smelting furnace 1 is used to heat recycled lead materials so as to convert the recycled lead materials from solid state to liquid state, the smelting furnace 1 can adopt a smelting furnace capable of feeding, which can send the materials heated to liquid state into the inside of the distribution furnace 2, part of waste gas will be generated in the process of heating and melting of the recycled lead materials, a first gas conveying pipe 3 is arranged at the distribution furnace 2, and the waste gas can be conveyed through the first gas conveying pipe 3.

[0022] In order to treat the waste gas, therefore, a treatment pool 4 is arranged at the smelting furnace 1, and the waste gas in the first gas conveying pipe 3 is introduced into the solution in the treatment pool 4. The treatment pool 4 stores a solution with weak alkalinity, the waste gas is mixed with the solution, the solution adsorbs part of impurities in the waste gas, and the preliminary treatment of the waste gas is completed.

[0023] Specifically, in order to accelerate the mixing speed of the waste gas and the solution, a stirring unit 5 is arranged at the treatment pool 4, two stirring units 5 are arranged, and the two stirring units 5 are symmetrically distributed with the center line of the treatment pool 4 as the center.

[0024] It should be noted that the stirring unit 5 includes a stirring shaft 501 rotatably arranged in the treatment pool 4, a blade 502 mounted on the stirring shaft 501 and located in the treatment pool 4, and a stirring motor 503 connected with the stirring shaft 501 and used to provide power for the stirring shaft 501.

[0025] The stirring unit 5 can be provided with two, two stirring units 5 in work, the rotating direction of two groups of blades 502 is opposite, and the primary gas conveying pipe 3 is communicated to the middle region of the treatment tank 4, so that the waste gas transported by the primary gas conveying pipe 3 can be fully mixed with the solution.

[0026] In order to avoid the gas leakage of the treatment tank 4 and improve the treatment effect of the treatment tank 4, a top cover 6 is arranged on the top of the treatment tank 4, the primary gas conveying pipe 3 penetrates the top cover 6, and the top cover 6 is provided with a plurality of dosing hoppers 7 which are arranged in a slope distribution, and the dosing hoppers 7 are provided with detachable sealing covers 8 on the top.

[0027] The dosing hoppers 7 can store slaked lime, and after the slaked lime is added into the treatment tank 4, the heavy metal impurities in the solution can be adsorbed, and the slaked lime can react with the acidic substances in the waste gas to separate the acidic substances from the slaked lime.

[0028] Specifically, the treatment tank 4 is provided with a secondary gas conveying pipe 9 for conveying the waste gas treated by the solution in the treatment tank 4, the secondary gas conveying pipe 9 penetrates the top cover 6, and the secondary gas conveying pipe 9 is detachably installed on the top cover 6 by bolts.

[0029] In order to treat the waste gas transported by the secondary gas conveying pipe 9, a filtering unit 10 for filtering the waste gas transported by the secondary gas conveying pipe 9 and an exhaust pipe 17 communicating with the filtering unit 10 are arranged at the secondary gas conveying pipe 9.

[0030] The filtering unit 10 can adsorb the waste gas, and then the filtering unit 10 needs to be regularly disassembled and cleaned, in order to facilitate the disassembly and assembly of the filtering unit 10, the filtering unit 10 comprises two connecting plates 1001 and a filter tank, the two connecting plates 1001 are arranged at two ends of the filter tank respectively, and the filter tank is filled with activated carbon for adsorbing the waste gas.

[0031] Specifically, the connecting plate 1001 is provided with a groove, and the groove is provided with a sealing gasket 1002.

[0032] More specifically, one end of the filtering unit 10 is provided with a first mounting unit 11 and a first guide frame 12 connected with the first mounting unit 11, the first guide frame 12 is provided with a first vertical groove 1201 and a first horizontal groove 1202, the first vertical groove 1201 and the first horizontal groove 1202 are arranged in a vertical distribution, the first vertical groove 1201 cooperates with the connecting plate 1001, the depth of the first horizontal groove 1202 is greater than the thickness of the connecting plate 1001, and the first mounting unit 11 is connected with the secondary gas conveying pipe 9 by a positioning pin.

[0033] It should be noted that the second installation unit 13 is provided on the side away from the first installation unit 11 of the filtering unit 10, and a second guide frame is arranged in the second installation unit 13, and a second vertical groove and a second horizontal groove in communication are arranged in the second guide frame, the size of the second vertical groove is the same as that of the first vertical groove 1201, the size of the second horizontal groove is the same as that of the first horizontal groove 1202, and an inner tube 15 is arranged at the second installation unit 13, the outer wall of one end of the inner tube 15 is matched with the inner wall of the filtering unit 10, and the inner wall of the end of the inner tube 15 away from the filtering unit 10 is matched with the inner wall of the exhaust pipe 17.

[0034] Specifically, the inner tube 15 is fixedly installed on the second installation unit 13, and the second installation unit 13 is connected with the telescopic unit 16, the first sealing groove and the second sealing groove are arranged in the inner tube 15, the first sealing ring is arranged in the first sealing groove, and the second sealing ring is arranged in the second sealing groove, when the filtering unit 10 is installed between the second gas conveying pipe 9 and the exhaust pipe 17, the outer wall of the first sealing ring is attached to the inner wall of the filtering unit 10, and the outer wall of the second sealing ring is attached to the inner wall of the exhaust pipe 17.

[0035] It should be noted that the second installation unit 13 and the exhaust pipe 17 are provided with guide rods 14 for limiting the movement of the second installation unit 13, and the guide rods 14 are arranged in a plurality of and are distributed in a circular array around the center line of the second installation unit 13.

[0036] When the filtering unit 10 needs to be disassembled, the telescopic unit 16 is started, the telescopic unit 16 can push the second installation unit 13 to move, when the second installation unit 13 is initially moved, the connecting disc 1001 on the right side of the filtering unit 10 is relatively displaced with the second installation unit 13, the connecting disc 1001 on the right side enters the second vertical groove, at this time, the second installation unit 13 continues to move, can pull the filtering unit 10 clamped into the second vertical groove to move, until the connecting disc 1001 on the left side of the filtering unit 10 enters the first vertical groove 1201, at this time, the filtering unit 10 can be pulled vertically, and the filtering unit 10 is taken out from between the first installation unit 11 and the second installation unit 13, the taking-out work of the filtering unit 10 is completed, and after the filtering unit 10 is cleaned and replaced with activated carbon, the filtering unit 10 enters from the first vertical groove 1201 and the second vertical groove, and then the telescopic unit 16 is started, and the filtering unit 10 is clamped by the first installation unit 11 and the second installation unit 13, so that the taking-out and separation work of the filtering unit 10 is more convenient.

[0037] The telescopic unit 16 can adopt a pneumatic cylinder, which can push the second installation unit 13 to move.

[0038] In summary, the embodiment of the present application provides a regenerative lead smelting waste gas treatment device, the solution in the treatment tank 4 is weak alkaline, the waste gas is mixed with the solution, the solution adsorbs part of the impurities in the waste gas, the preliminary treatment of the waste gas is completed, the stirring unit 5 can be provided with two, the rotating directions of the two groups of blades 502 are opposite when the two stirring units 5 work, and the first-stage gas conveying pipe 3 is connected to the middle region of the treatment tank 4, so that the waste gas conveyed by the first-stage gas conveying pipe 3 can be fully mixed with the solution, the slaked lime can be stored in the dosing hopper 7, the slaked lime can adsorb the heavy metal impurities in the solution after being added into the treatment tank 4, and the slaked lime can react with the acidic substances in the waste gas to separate the acidic substances from the slaked lime.

[0039] When the filter unit 10 needs to be disassembled, the telescopic unit 16 is started, the telescopic unit 16 can push the second mounting unit 13 to move, when the second mounting unit 13 moves initially, the connecting disc 1001 on the right side of the filter unit 10 is displaced relative to the second mounting unit 13, and the connecting disc 1001 on the right side enters the second vertical groove, at this time, the second mounting unit 13 continues to move and can pull the filter unit 10 clamped in the second vertical groove to move, until the connecting disc 1001 on the left side of the filter unit 10 enters the first vertical groove 1201, at this time, the filter unit 10 can be pulled vertically and taken out from between the first mounting unit 11 and the second mounting unit 13, the taking-out work of the filter unit 10 is completed, and the filter unit 10 after cleaning and replacing the activated carbon enters from the first vertical groove 1201 and the second vertical groove, then the telescopic unit 16 is started, and the filter unit 10 is clamped by the first mounting unit 11 and the second mounting unit 13, so that the taking-out and separating work of the filter unit 10 is more convenient.

[0040] The above only discloses several specific embodiments of the present application, but the embodiments of the present application are not limited to this, any changes that can be thought of by those skilled in the art should fall within the protection scope of the present application.

Claims

1. A secondary lead smelting off-gas treatment apparatus comprising a smelting furnace (1), characterized in that, The smelting furnace (1) is provided with a distribution furnace (2) communicated with the smelting furnace (1), and the distribution furnace (2) is provided with a first gas conveying pipe (3); The smelting furnace (1) is provided with a treatment tank (4), and the waste gas in the first gas conveying pipe (3) is introduced into the solution in the treatment tank (4); The treatment tank (4) is provided with a second gas conveying pipe (9) for conveying the waste gas treated by the solution in the treatment tank (4); The second gas conveying pipe (9) is provided with a filtering unit (10) for filtering the waste gas conveyed by the second gas conveying pipe (9), and an exhaust pipe (17) communicated with the filtering unit (10); The filtering unit (10) comprises two connecting plates (1001) and a filtering tank, the two connecting plates (1001) are arranged at two ends of the filtering tank respectively, and the filtering tank is filled with activated carbon for adsorbing the waste gas.

2. A lead smelting off gas treatment plant as claimed in claim 1, wherein, The treatment tank (4) is provided with two stirring units (5) which are symmetrically distributed with the center line of the treatment tank (4).

3. A lead smelting off gas treatment plant as claimed in claim 2, wherein, The stirring unit (5) comprises a stirring shaft (501) rotatably arranged in the treatment tank (4), a blade (502) mounted on the stirring shaft (501) and located in the treatment tank (4), and a stirring motor (503) connected with the stirring shaft (501) and used for providing power for the stirring shaft (501).

4. A lead smelting off gas treatment plant as claimed in claim 1, wherein, The top of the treatment tank (4) is provided with a top cover (6), the first gas conveying pipe (3) penetrates the top cover (6), and the top cover (6) is provided with an inclinedly distributed dosing funnel (7), and the top of the dosing funnel (7) is provided with a detachably connected sealing cover (8).

5. A lead smelting off gas treatment plant as claimed in claim 4, wherein, The second gas conveying pipe (9) penetrates the top cover (6), and the second gas conveying pipe (9) is detachably mounted on the top cover (6) by bolts.

6. A lead smelting off gas treatment plant as claimed in claim 1, wherein, The connecting plate (1001) is provided with a groove, and the groove is provided with a sealing gasket (1002).

7. A lead smelting off gas treatment plant as claimed in claim 1, wherein, One end of the filtering unit (10) is provided with a first mounting unit (11) and a first guide frame (12) connected with the first mounting unit (11), the first guide frame (12) is provided with a first vertical groove (1201) and a first horizontal groove (1202), the first vertical groove (1201) and the first horizontal groove (1202) are vertically distributed, the first vertical groove (1201) is matched with the connecting plate (1001), the depth of the first horizontal groove (1202) is greater than the thickness of the connecting plate (1001), and the first mounting unit (11) is connected with the second gas conveying pipe (9) through a positioning pin.

8. A lead smelting off gas treatment plant as claimed in claim 7, wherein, The side of the filtering unit (10) away from the first mounting unit (11) is provided with a second mounting unit (13) and a second guide frame, the second guide frame is provided with a second vertical groove and a second horizontal groove which are communicated, the size of the second vertical groove is same as that of the first vertical groove (1201), the size of the second horizontal groove is same as that of the first horizontal groove (1202), the second mounting unit (13) is provided with an inner tube (15), the outer wall of one end of the inner tube (15) is matched with the inner wall of the filtering unit (10), and the inner wall of the end of the inner tube (15) away from the filtering unit (10) is matched with the inner wall of the exhaust pipe (17).

9. A lead smelting off gas treatment plant as claimed in claim 8, wherein, The inner tube (15) is fixedly installed on the second mounting unit (13), and the second mounting unit (13) is connected with the telescopic unit (16), the inner tube (15) is provided with a first sealing groove and a second sealing groove, the first sealing groove is provided with a first sealing ring, and the second sealing groove is provided with a second sealing ring; when the filtering unit (10) is installed between the secondary gas conveying pipe (9) and the exhaust pipe (17), the outer wall of the first sealing ring is attached to the inner wall of the filtering unit (10), and the outer wall of the second sealing ring is attached to the inner wall of the exhaust pipe (17).

10. A lead smelting off gas treatment plant as claimed in claim 9, wherein, The second mounting unit (13) is provided with guide rods (14) for limiting the movement of the second mounting unit (13) at the exhaust pipe (17), the guide rods (14) are provided in plurality, and the plurality of guide rods (14) are circumferentially distributed around the center line of the second mounting unit (13).

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