Lead paste recovery system for waste lead storage battery

Abstract

The utility model belongs to the technical field of lead plaster recovery through wet disassembly of waste lead storage batteries, and discloses a lead plaster recovery system for waste lead storage batteries, which comprises a crusher, a settling pond, a scraper conveyor, a lead plaster premixing tank, a lead plaster pump, a filter press, a vibration cleaning sieve, a mud pump, a filtrate tank and a filtrate circulating pump, the vibration cleaning sieve is located above the sedimentation tank, a raw material inlet corresponds to an outlet of the crusher, an inlet of the mud pump is connected with a lead plaster outlet in the bottom of the sedimentation tank, an outlet is connected with an inlet of the lead plaster premixing tank, an inlet of the lead plaster pump is connected with an outlet in the bottom of the lead plaster premixing tank, and an outlet is connected with a raw material inlet of the filter press. An inlet of the filtrate tank is connected with a filtrate outlet of the filter press, an inlet of the filtrate circulating pump is connected with a bottom outlet of the filtrate tank, and an outlet is connected with an inlet of the mud pump. The lead plaster is transferred from the sedimentation tank in two ways, so that the feeding requirement of the filter press can be met, the feeding time interval of the filter press is reduced, and the daily output of the lead plaster is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of wet disassembly and lead paste recovery of waste lead storage battery, and particularly relates to a lead paste recovery system of waste lead storage battery. BACKGROUND

[0002] Waste lead storage battery is a kind of waste with corrosiveness and harmfulness, if directly filling or other treatment is carried out, certain influence can be caused to environment, not only environment is polluted, but also lead and plastic parts of waste lead storage battery can be classified and recycled, and resource waste is caused too. Therefore, waste lead storage battery is usually broken up and then recovered.

[0003] At present, waste lead storage battery treatment technology is mainly through wet disassembly, that is, waste lead storage battery is broken up by a crusher, then separated by using density difference of each component and equipment screening, a large amount of lead paste in the battery is separated into lead paste sedimentation equipment after being screened by liquid flushing, and the lead paste is deposited in the lead paste sedimentation equipment by natural sedimentation or under the action of flocculating agent, and then continuously scraped to a lead paste premixing tank with stirring by a bottom scraper. Then, the lead paste is pumped into a filter press by a lead paste pump to filter the lead paste and discharge water, so that lead paste with water content ≤10% is obtained. The speed of collecting lead paste by the lead paste premixing tank is determined by the lead paste sedimentation effect and the frequency of the scraper, but it is limited to improve the collection speed of the lead paste premixing tank by improving the sedimentation speed, and a higher scraper frequency will cause a greater burden on the production equipment. SUMMARY

[0004] The utility model provides a kind of lead paste recovery system of waste lead storage battery to the technical problem that the lead paste collection speed of existing waste lead storage battery disassembly line is influenced, by adopting two ways to transfer lead paste from sedimentation tank, can meet the feeding requirement of filter press, reduce the feeding time interval of filter press, shorten the discharging time of each plate of compressor, improve lead paste daily output.

[0005] To achieve the above object, the utility model adopts the following technical scheme:

[0006] A kind of lead paste recovery system of waste lead storage battery, including crusher, sedimentation tank, scraper conveyor, lead paste premixing tank, lead paste pump and filter press, it further includes vibration cleaning screen, mud pump, filtrate tank and filtrate circulating pump, the vibration cleaning screen is located above sedimentation tank, raw material inlet corresponds the outlet of crusher, one end of the scraper conveyor is located in sedimentation tank, and the other end is located above the inlet of lead paste premixing tank, the inlet of mud pump is connected with the lead paste outlet of the bottom of sedimentation tank, and the outlet is connected with the inlet of lead paste premixing tank, the inlet of lead paste pump is connected with the bottom outlet of lead paste premixing tank, and the outlet is connected with the raw material inlet of filter press, the inlet of filtrate tank is connected with the filtrate outlet of filter press, and the inlet of filtrate circulating pump is connected with the bottom outlet of filtrate tank, and the outlet is connected with the inlet of mud pump.

[0007] In the above technical solution, the vibrating cleaning screen is provided with multiple screen plates in a stepped manner.

[0008] In the above technical solution, the outlet of the filtrate circulation pump is also connected to the inlet of the rinsing water pipe of the vibrating cleaning screen.

[0009] In the above technical solution, the outlet of the filtrate circulation pump is also connected to the inlet of the lead paste pump.

[0010] In the above technical solution, an inclined screen plate is installed in the inlet pipe of the scraper conveyor and the lead paste premixing tank.

[0011] In the above technical solution, the outlet of the filtrate circulation pump is also connected to the inlet of the rinsing water pipe above the inclined screen plate.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] This invention incorporates a scraper conveyor and a sludge pump, employing two methods to transfer lead paste from the sedimentation tank. This satisfies the feed requirements of the filter press, reduces the feed interval, shortens the discharge time per plate in the compressor, and increases the daily lead paste output. Simultaneously, the outlet of the filtrate circulation pump is connected to the inlet pipes of both the sludge pump and the lead paste pump, forming backwashing lines for both pumps. The filtrate is used to backwash these pumps. Once pumping is normal, the backwashing line valves and the filtrate circulation pump are closed, improving operational efficiency. Furthermore, this invention uses the filtrate as rinsing water for the vibrating cleaning screen, cleaning lead grids and plastic sheets to reduce the lead paste content on their surfaces, further realizing the recycling of the filtrate. Attached Figure Description

[0014] Figure 1 This is one of the schematic diagrams of a waste lead-acid battery lead paste recycling system according to this utility model.

[0015] Figure 2 This is the second schematic diagram of a waste lead-acid battery lead paste recycling system according to this utility model.

[0016] The following labels in the attached diagram are: 1 for crusher, 2 for sedimentation tank, 3 for scraper conveyor, 4 for sludge pump, 5 for lead paste premixing tank, 6 for lead paste pump, 7 for filtrate circulation pump, 8 for filter press, 9 for filtrate tank, 10 for vibrating washing screen, and 11 for inclined screen plate. Detailed Implementation

[0017] The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of protection of the present invention.

[0018] Example 1

[0019] like Figure 1As shown, this utility model discloses a waste lead-acid battery lead paste recycling system, including a crusher 1, a sedimentation tank 2, a scraper conveyor 3, a lead paste premixing tank 5, a lead paste pump 6, and a filter press 8. It also includes a vibrating washing screen 10, a sludge pump 4, a filtrate tank 9, and a filtrate circulation pump 7. The vibrating washing screen 10 is located above the sedimentation tank 2, with its raw material inlet corresponding to the outlet of the crusher 1. One end of the scraper conveyor 3 is located in the sedimentation tank 2, and the other end is located above the inlet of the lead paste premixing tank 5. The inlet of the sludge pump 4 is connected to the lead paste outlet at the bottom of the sedimentation tank 2, and its outlet is connected to the inlet of the lead paste premixing tank 5. The inlet of the lead paste pump 6 is connected to the bottom outlet of the lead paste premixing tank 5, and its outlet is connected to the raw material inlet of the filter press 8. The inlet of the filtrate tank 9 is connected to the filtrate outlet of the filter press 8. The inlet of the filtrate circulation pump 7 is connected to the bottom outlet of the filtrate tank 9, and its outlet is connected to the inlet of the sludge pump 4 and the inlet of the lead paste pump 6.

[0020] In one embodiment, the crusher 1 is a pendulum crusher, and the vibrating cleaning screen 10 is equipped with screen plates with a screen gap size of 0.5~0.8mm in a five-stage stepped manner. The drive device of the scraper conveyor 3 is a servo motor, which can adjust the running speed of the scraper conveyor 3 according to the crushing and dismantling volume. A sealed pipe is set between the discharge point of the scraper conveyor 3 and the inlet of the lead paste premix tank 5 to prevent the lead paste from splashing randomly or deviating from the preset discharge position during the falling process. The crushed waste lead-acid batteries fall onto the screen plate of the vibrating cleaning screen 10. Under the obstruction of screen gaps of different sizes, the cleaned battery fragments are discharged, while the fine lead grids and lead paste quickly fall into the sedimentation tank 2. Flocculants are added at different points in the sedimentation tank 2, and under the action of flocculants, the lead paste is quickly concentrated and precipitated at the bottom of the sedimentation tank 2. 60-80% of the lead paste is sent to the lead paste premixing tank 5 by the scraper conveyor 3. After the concentration is adjusted, it is sent to the filter press 8 by the lead paste pump 6 to dewater and produce lead paste. The 20-40% of lead paste that does not settle in time forms a lead paste concentration zone in the sedimentation tank 2. It is sent to the lead paste premixing tank 5 by the sludge pump 4. After the concentration is adjusted, it is pumped into the filter press 8 to dewater and produce lead paste. By using two methods to transfer lead paste from the sedimentation tank 2, the feeding requirements of the filter press 8 can be met, the feeding time interval of the filter press 8 can be reduced, the discharge time of each plate of the compressor 8 can be shortened, and the daily output of lead paste can be increased.

[0021] To prevent clogging of the sludge pump 4 and lead paste pump 6, which would affect operations, the outlet of the filtrate circulation pump 7 is connected to the inlet pipes of the sludge pump 4 and the lead paste pump 6, respectively, forming a backwashing pipeline for the sludge pump 4 and the lead paste pump 6. The filtrate is used to backwash the sludge pump 4 and the lead paste pump 6. After the pumping is normal, the backwashing pipeline valve and the filtrate circulation pump 7 are closed to improve operational efficiency.

[0022] Example 2

[0023] like Figure 2As shown, this embodiment is basically the same as embodiment 1, except that: an inclined screen plate 11 is installed in the inlet pipe of the scraper conveyor 3 and the lead paste premix tank 5, and the outlet pipe of the filtrate circulation pump 7 is also connected to the inlet of the rinsing water pipe of the vibrating cleaning screen 10 and the inlet of the rinsing water pipe above the inclined screen plate 11.

[0024] Since the filtrate after pressure filtration has good water quality, it can be used as rinsing water for the vibrating cleaning screen 10 to clean lead grids and plastic sheets, reducing the content of lead paste adhering to their surfaces and further realizing the recycling of filtrate. In addition, since the lead paste conveyed by the scraper conveyor 3 still contains battery fragments with smaller particle sizes, an inclined screen plate 11 is set at the inlet of the lead paste premixing tank 5. The diameter of the screen holes of the inclined screen plate 11 is smaller than the width of the screen gap of the smallest stage screen plate in the vibrating cleaning screen 10, which can further filter impurities in the lead paste and improve the quality of the lead paste. In order to avoid clogging of the screen holes of the inclined screen plate 11, a rinsing water pipe can also be set above the inclined screen plate 11 to rinse the inclined screen plate 11. The rinsing water can also use the filtrate in the filtrate tank 9, and the dirty water after rinsing is discharged from the outlet valve at the bottom of the inclined screen plate 11.

[0025] The embodiments described above are merely preferred embodiments of this utility model and are only used to explain this utility model. They are not intended to limit the scope of implementation of this utility model. For those skilled in the art, other implementation methods can be easily made by substitution or modification based on the technical content disclosed in this specification. Therefore, all changes and improvements made on the principle of this utility model should be included within the scope of the patent application of this utility model.

Claims

1. A waste lead-acid battery lead paste recycling system, comprising a crusher (1), a sedimentation tank (2), a scraper conveyor (3), a lead paste premixing tank (5), a lead paste pump (6), and a filter press (8), characterized in that, It also includes a vibrating cleaning screen (10), a sludge pump (4), a filtrate tank (9), and a filtrate circulation pump (7). The vibrating cleaning screen (10) is located above the sedimentation tank (2), with the raw material inlet corresponding to the outlet of the crusher (1). One end of the scraper conveyor (3) is located in the sedimentation tank (2), and the other end is located above the inlet of the lead paste premixing tank (5). The inlet of the sludge pump (4) is connected to the bottom lead paste outlet of the sedimentation tank (2), and the outlet is connected to the inlet of the lead paste premixing tank (5). The inlet of the lead paste pump (6) is connected to the bottom outlet of the lead paste premixing tank (5), and the outlet is connected to the raw material inlet of the filter press (8). The inlet of the filtrate tank (9) is connected to the filtrate outlet of the filter press (8). The inlet of the filtrate circulation pump (7) is connected to the bottom outlet of the filtrate tank (9), and the outlet is connected to the inlet of the sludge pump (4).

2. The waste lead-acid battery lead paste recycling system according to claim 1, characterized in that, The vibrating cleaning screen (10) has multiple sieve plates arranged in a stepped manner.

3. The waste lead-acid battery lead paste recycling system according to claim 1, characterized in that, The outlet of the filtrate circulation pump (7) is also connected to the inlet of the rinsing water pipe of the vibrating cleaning screen (10).

4. A waste lead-acid battery lead paste recycling system according to claim 1, characterized in that, The outlet of the filtrate circulation pump (7) is also connected to the inlet of the lead paste pump (6).

5. A waste lead-acid battery lead paste recycling system according to claim 1, characterized in that, Inclined screens (11) are installed in the inlet pipes of the scraper conveyor (3) and the lead paste premix tank (5).

6. A waste lead-acid battery lead paste recycling system according to claim 5, characterized in that, The outlet of the filtrate circulation pump (7) is also connected to the inlet of the flushing water pipe above the inclined screen plate (11).

Images