A recycling device for processing lead-containing waste material

Abstract

The utility model discloses a recycling device for processing lead-containing waste, including scale board conveyer, receiving warehouse, first plug -in board valve, intermediate bin, second plug -in board valve, chute, novel reduction electric stove, nitrogen making system, ammonia decomposition system, oxidation flue, oxidation fan, cooling fan, settling cylinder, dust catcher, induced draft fan, chimney and apron conveyer. The utility model has carbon emission is little, and the advantages such as small floor space, simple technological process, clean and efficient, low energy consumption.

Description

Technical Field

[0001] This utility model belongs to the field of hazardous waste treatment and recycling technology, specifically relating to a recycling device for treating lead-containing waste. Background Technology

[0002] Zinc-containing waste contains valuable metals such as lead, zinc, and iron. Existing recycling equipment for lead-containing waste has drawbacks such as high carbon emissions, large footprint, complex processes, lack of cleanliness, and high energy consumption. Utility Model Content

[0003] This utility model aims to at least partially solve one of the technical problems in the related art.

[0004] Therefore, the technical solution adopted by this utility model is: a recycling device for treating lead-containing waste, comprising a slat conveyor, a receiving silo, a first gate valve, an intermediate silo, a second gate valve, a chute, a novel reduction electric furnace, a nitrogen generation system, an ammonia decomposition system, an oxidation flue, an oxidation fan, a cooling fan, a settling cylinder, a dust collector, an induced draft fan, a chimney, and a scraper conveyor. The discharge end of the slat conveyor is located directly above the inlet of the receiving silo. The outlet of the receiving silo is connected to the inlet of the intermediate silo. The first gate valve is located between the outlet of the receiving silo and the inlet of the intermediate silo. The outlet of the intermediate silo is connected to the inlet of the chute. The second gate valve is located between the outlet of the intermediate silo and the inlet of the chute. The outlet of the chute is connected to the feed inlet of the novel reduction electric furnace. The outlet of the nitrogen generation system is connected to the nitrogen inlet of the novel reduction electric furnace. The reduction furnace has multiple side air inlets on its side walls, each connected to a side-blowing spray gun. The top wall of the new reduction furnace has a top air inlet connected to a top-blowing spray gun. The outlet of the ammonia decomposition system is connected to both the side air inlets and the top air inlet. The flue gas outlet of the new reduction furnace is connected to the inlet of the oxidation flue. The outlet of the oxidation fan is connected to the air inlet of the oxidation flue. A cooling jacket is provided on the outer wall of the oxidation flue. The cooling air inlet of the cooling jacket is connected to the outlet of the cooling fan. The outlet of the oxidation flue is connected to the flue gas inlet of the settling cylinder. The flue gas outlet of the settling cylinder is connected to the flue gas inlet of the dust collector. The flue gas outlet of the dust collector is connected to the chimney via an induced draft fan. One end of the conveyor belt of the scraper conveyor is located below the discharge port of the settling cylinder, and the other end is located below the discharge port of the dust collector.

[0005] The oxidation flue is provided with a hot air outlet at the end away from its cooling air inlet. The hot air outlet is connected to a hot air pipe, and the outlet of the hot air pipe blows towards the conveyor belt of the apron conveyor, thereby indirectly heating the material.

[0006] A packaging machine is installed below the scraper conveyor, with the inlet of the packaging machine located directly below the discharge end of the scraper conveyor belt.

[0007] The receiving bin is located directly above the intermediate bin.

[0008] Compared with the prior art, the present invention has the following advantages: the present invention has the advantages of low carbon emissions, small footprint, simple process, clean and efficient operation, and low energy consumption. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the structure of this utility model. Detailed Implementation

[0010] To make the objectives, technical solutions, and advantages of this application clearer, the application will be described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of this application.

[0011] Conversely, this application covers any alternatives, modifications, equivalent methods, and schemes made within the spirit and scope of this application as defined by the claims. Furthermore, to provide the public with a better understanding of this application, certain specific details are described in detail below. However, this application can be fully understood by those skilled in the art even without these detailed descriptions.

[0012] See Figure 1A recycling device for treating lead-containing waste includes a slat conveyor 1, a receiving hopper 2, a first gate valve 3, an intermediate hopper 4, a second gate valve 5, a chute 6, a novel reduction electric furnace 7, a nitrogen generation system 8, an ammonia decomposition system 9, an oxidation flue 10, an oxidation fan 11, a cooling fan 12, a settling cylinder 13, a dust collector 14, an induced draft fan 15, a chimney 16, and a scraper conveyor 17. The discharge end of the slat conveyor 1 is located directly above the inlet of the receiving hopper 2. The outlet of the receiving hopper 2 is connected to the inlet of the intermediate hopper 4. The first gate valve 3 is located between the outlet of the receiving hopper 2 and the inlet of the intermediate hopper 4. The outlet of the intermediate hopper 4 is connected to the inlet of the chute 6. The second gate valve 5 is located between the outlet of the intermediate hopper 4 and the inlet of the chute 6. The outlet of the chute 6 is connected to the feed inlet of the novel reduction electric furnace 7. The outlet of the nitrogen generation system 8 is connected to the nitrogen inlet of the novel reduction electric furnace 7. The side wall of the new reduction electric furnace 7 is provided with multiple side air inlets, each of which is connected to a side-blowing spray gun. The top wall of the new reduction electric furnace 7 is provided with a top air inlet, which is connected to a top-blowing spray gun. The outlet of the ammonia decomposition system 9 is connected to both the side air inlets and the top air inlet. The flue gas outlet of the new reduction electric furnace 7 is connected to the inlet of the oxidation flue 10. The outlet of the oxidation fan 11 is connected to the air inlet of the oxidation flue 10. A cooling jacket is provided on the outer wall of the oxidation flue 10. The cooling air inlet of the cooling jacket is connected to the outlet of the cooling fan 12. The outlet of the oxidation flue 10 is connected to the flue gas inlet of the settling cylinder 13. The flue gas outlet of the settling cylinder 13 is connected to the flue gas inlet of the dust collector 14. The flue gas outlet of the dust collector 14 is connected to the chimney 16 through the induced draft fan 15. One end of the conveyor belt of the scraper conveyor 17 is located below the discharge port of the settling cylinder 13, and the other end is located below the discharge port of the dust collector 14.

[0013] The oxidation flue 10 has a hot air outlet at the end away from its cooling air inlet. The hot air outlet is connected to a hot air pipe, and the outlet of the hot air pipe blows towards the conveyor belt of the apron conveyor 1, thereby indirectly heating the material.

[0014] A packaging machine 18 is located below the scraper conveyor 17, and the inlet of the packaging machine 18 is located directly below the discharge end of the conveyor belt of the scraper conveyor 17.

[0015] The receiving bin 2 is located directly above the intermediate bin 4.

[0016] The working process of this invention is as follows: The nitrogen generation system is started, and nitrogen gas is first introduced into the new type of reduction electric furnace to replace the air inside the furnace. Zinc-containing waste enters the alumina conveyor and is heated by hot air from the cooling oxidation flue before entering the raw material silo. The first gate valve is opened, and the waste enters the intermediate silo. The first gate valve is closed, and the second gate valve is opened, allowing the waste to enter the new type of reduction electric furnace through a chute. Reduction takes place inside the furnace. The ammonia decomposition system produces nitrogen and hydrogen gas, which enter the melt through the side-blowing nozzles of the new type of reduction electric furnace, stirring the melt. During the strong reduction stage, ammonia decomposition gas is also injected into the furnace through the top-blowing lance, increasing the metallurgical intensity. The metallic iron in the waste is released in liquid form from the iron discharge port of the new type of reduction furnace. The reduced flue gas containing lead and zinc vapors enters the oxidation flue. An oxidation fan blows air into the flue, where the lead and zinc vapors are oxidized into lead oxide and zinc oxide. Simultaneously, a cooling fan blows cold air into the flue's interlayer for cooling. The heated air in the interlayer is then fed into a slatted conveyor to further heat the material. The cooled flue gas enters a settling chamber to collect the large amounts of zinc oxide and lead oxide dust, which is then discharged onto a scraper conveyor. The settled flue gas then enters a baghouse dust collector for further collection of zinc oxide and lead oxide dust, which is also discharged onto a scraper conveyor. The dust-collected flue gas is then introduced into the chimney by an induced draft fan for compliant emissions. The collected dust is then packaged by a packaging machine for sale.

[0017] The reduction furnace used is electrically heated and can use one, two or three electrodes. The reduction temperature inside the furnace is controlled at 1000-1450℃.

[0018] The reduction furnace used has an iron tapping port and a slag tapping port, and the furnace bottom has an inclined structure.

[0019] The reducing agent in this invention is hydrogen gas, which is derived from ammonia decomposition gas, and the hydrogen flow rate is 20 Nm³. 3 / min-250Nm 3 / min.

[0020] This utility model's reduction furnace employs a combined side-blowing and top-blowing refining method, with 2-16 side-blowing spray guns.

[0021] Depending on the required reduction strength, the top-blown nozzle of the reduction furnace can be adjusted. This nozzle can spray ammonia decomposition gas, nitrogen gas, or no gas at all.

[0022] The reduced flue gas enters the oxidation flue, where an oxidation fan blows air in to burn the waste hydrogen and oxidize the volatilized zinc and lead vapors into zinc oxide and lead oxide.

[0023] The oxidation flue has a sandwich structure. Cool air is blown into the sandwich by a cooling fan. After being heated, the cool air is sent to the apron conveyor to heat the material to 60-200℃.

[0024] A settling cylinder is used to collect the smoke and dust in one stage. The settling cylinder has a sleeve-type structure.

Claims

1. A recycling device for processing lead-containing waste, characterized in that: The system includes a slat conveyor (1), a receiving hopper (2), a first gate valve (3), an intermediate hopper (4), a second gate valve (5), a chute (6), a new type of reduction electric furnace (7), a nitrogen production system (8), an ammonia decomposition system (9), an oxidation flue (10), an oxidation blower (11), a cooling blower (12), a settling cylinder (13), a dust collector (14), an induced draft fan (15), a chimney (16), and a scraper conveyor (17). The discharge end of the slat conveyor (1) is located directly above the inlet of the receiving hopper (2). The outlet of the receiving silo (2) is connected to the inlet of the intermediate silo (4). A first gate valve (3) is installed between the outlet of the receiving silo (2) and the inlet of the intermediate silo (4). The outlet of the intermediate silo (4) is connected to the inlet of the chute (6). A second gate valve (5) is installed between the outlet of the intermediate silo (4) and the inlet of the chute (6). The outlet of the chute (6) is connected to the feed inlet of the new type of reduction electric furnace (7). The outlet of the nitrogen generation system (8) is connected to the nitrogen inlet of the new type of reduction electric furnace (7). The side wall of the reduction furnace (7) is provided with multiple side air inlets, each of which is connected to a side-blowing spray gun. The top wall of the new reduction furnace (7) is provided with a top air inlet, which is connected to a top-blowing spray gun. The outlet of the ammonia decomposition system (9) is connected to both the side air inlets and the top air inlet. The flue gas outlet of the new reduction furnace (7) is connected to the inlet of the oxidation flue (10). The outlet of the oxidation blower (11) is connected to the air inlet of the oxidation flue (10). The outer wall of the oxidation flue (10) is provided with... The cooling jacket has a cooling air inlet connected to the outlet of the cooling fan (12), the outlet of the oxidation flue (10) connected to the flue gas inlet of the settling cylinder (13), the flue gas outlet of the settling cylinder (13) connected to the flue gas inlet of the dust collector (14), and the flue gas outlet of the dust collector (14) connected to the chimney (16) via the induced draft fan (15). One end of the conveyor belt of the scraper conveyor (17) is located below the discharge port of the settling cylinder (13), and the other end is located below the discharge port of the dust collector (14).

2. The recycling device for treating lead-containing waste as described in claim 1, characterized in that: The oxidation flue (10) has a hot air outlet at the end away from its cooling air inlet. The hot air outlet is connected to a hot air pipe, and the outlet of the hot air pipe blows towards the conveyor belt of the apron conveyor (1), thereby indirectly heating the material.

3. The recycling device for treating lead-containing waste as described in claim 1, characterized in that: A packaging machine (18) is provided below the scraper conveyor (17), and the inlet of the packaging machine (18) is located directly below the discharge end of the conveyor belt of the scraper conveyor (17).

4. The recycling device for treating lead-containing waste as described in claim 1, characterized in that: The receiving bin (2) is located directly above the intermediate bin (4).

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