Copper electrolysis acid mist treatment system

Abstract

The utility model provides a copper electrolysis acid mist treatment system which comprises an absorption tower, a liquid alkali tank and a waste liquid tank, absorption liquid is arranged at the bottom end in the absorption tower, a spraying device is arranged at the upper end of the absorption tower, a tail gas pipe is arranged at the top end of the absorption tower, an air inlet is formed in the lower end of the side wall of the absorption tower, the outer end of the air inlet is connected with an induced draft fan, and the outer end of the induced draft fan is connected with an acid mist waste gas collecting pipeline. The bottom of the absorption tower is provided with a circulating pump, the circulating pump is used for pumping absorption liquid into the spraying device, the outlet end of the liquid alkali tank is connected with the liquid inlet end of the circulating pump, the liquid outlet end of the circulating pump is provided with two pipelines, the two pipelines are respectively connected with the spraying device and the waste liquid tank, and the two pipelines are respectively provided with a valve; the copper electrolysis acid mist treatment device can absorb and treat acid mist generated by copper electrolysis and reduce the amount of discharged acid mist, so that the environment-friendly requirement is met.

Description

Technical Field

[0001] The utility model relates to the technical field of copper electrolysis production in smelters, in particular to a copper electrolysis acid mist disposal system. Background Art

[0002] During copper electrolysis, the surface of the acid in the electrolyte circulation system (circulation tanks, electrolyte header tanks, anode mud intermediate tanks, and anode mud thickeners) evaporates due to heat. Acid molecules enter the air, condensing with moisture in the air to form droplets. During the cathode stripping unit washing process, the acid attached to the cathode copper surface evaporates due to heat. The acid molecules enter the air along with the water vapor, which cools and forms droplets. During the cleaning process in the scrap anode cleaning unit, the acid attached to the cathode copper surface evaporates due to heat. The acid molecules enter the air along with the water vapor, which cools and forms droplets. These droplets then form acid mist. Conventional methods for removing sulfuric acid mist include: first, ventilating and covering the electrolytic cell surface to reduce acid mist emission; second, sealing the pits, clear liquid tanks, and low-level tanks, using fans and acid mist towers. Currently, fans in the pits, anode plate rear liquid tanks, low-level tanks, and units are all direct-discharge fans, collecting the acid mist without treatment. Therefore, in order to improve the level of acid mist control, reduce the amount of acid mist emissions, and meet national environmental protection requirements, a new acid mist treatment system needs to be designed to effectively control on-site acid mist. Utility Model Content

[0003] In order to solve the above technical problems, the utility model provides a copper electrolytic acid mist disposal system.

[0004] The specific scheme of the utility model is as follows: a copper electrolytic acid mist disposal system, including an absorption tower, a liquid alkali tank and a waste liquid tank, the bottom end of the absorption tower is equipped with absorption liquid, the upper end is equipped with a spray device, the top is provided with a tail gas pipe, the lower end of the side wall of the absorption tower is provided with an air inlet, the outer end of the air inlet is connected to an induced draft fan, the outer end of the induced draft fan is connected to an acid mist waste gas collection pipe, a circulating pump is installed at the bottom of the absorption tower, the circulating pump is used to pump the absorption liquid into the spray device, the outlet end of the liquid alkali tank is connected to the liquid inlet end of the circulating pump, the liquid outlet end of the circulating pump is provided with two pipes, the two pipes are respectively connected to the spray device and the waste liquid tank, and valves are installed on both pipes.

[0005] Preferably, it further comprises a water tank, the outlet end of the water tank is provided with a flushing pump, and a flushing device is provided above the spraying device in the absorption tower, and the flushing device is connected to the flushing pump.

[0006] Preferably, the circulation pump and the water tank are both provided with a water supply port, which is connected to a production water source via a pipeline.

[0007] Preferably, a pit is further included, the inlet of the pit is connected to the bottom of the absorption tower through a pipeline, the pit is equipped with a pit pump, and the output end of the pit pump is connected to the waste liquid tank through a pipeline.

[0008] Preferably, the waste liquid tank is provided with two liquid outlet pipes, one of which is connected to the waste liquid recycling system, and the other is equipped with a waste liquid pump and connected to a sewage treatment station.

[0009] Compared with the prior art, the utility model has the following beneficial effects: it can absorb and process the acid mist generated by copper electrolysis, reduce the amount of discharged acid mist, and thus meet environmental protection requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a structural diagram of the utility model;

[0011] In the figure: 1. induced draft fan; 2. absorption tower; 3. spraying device; 4. flushing device; 5. tail gas pipe; 6. circulation pump; 7. flushing pump; 8. water tank; 9. liquid alkali tank; 10. pit; 11. waste liquid tank; 12. waste liquid pump. DETAILED DESCRIPTION

[0012] like Figure 1 As shown, this embodiment is a copper electrolytic acid mist disposal system, including an absorption tower 2, a liquid alkali tank 9 and a waste liquid tank 11. The bottom end of the absorption tower 2 is filled with absorption liquid, the upper end is provided with a spray device 3, and the top is provided with a tail gas pipe 5. The lower end of the side wall of the absorption tower 2 is provided with an air inlet, the outer end of the air inlet is connected to an induced draft fan 1, and the outer end of the induced draft fan 1 is connected to an acid mist waste gas collection pipe. A circulating pump 6 is installed at the bottom of the absorption tower 2, and the circulating pump 6 is used to pump the absorption liquid into the spray device 3. The outlet end of the liquid alkali tank 9 is connected to the liquid inlet end of the circulating pump 6, and the liquid outlet end of the circulating pump 6 is provided with two pipes, which are respectively connected to the spray device 3 and the waste liquid tank 11, and valves are installed on both pipes.

[0013] Preferably, a water tank 8 is further included, and a flushing pump 7 is installed at the outlet end of the water tank 8. A flushing device 4 is installed above the spraying device 3 in the absorption tower 2. The flushing device 4 is connected to the flushing pump 7. Water in the water tank 8 is regularly introduced through the flushing device 4 to flush the spraying device 3 to avoid clogging of the spraying device 3.

[0014] Preferably, the circulation pump 6 and the water tank 8 are both provided with a water supply port, which is connected to a production water source through a pipeline.

[0015] Preferably, it also includes a pit 10, the inlet of the pit 10 is connected to the bottom of the absorption tower 2 through a pipeline, the pit 10 is equipped with a pit pump, the output end of the pit pump is connected to the waste liquid tank 11 through a pipeline, the height of the pit 10 is lower than the absorption tower 2, when the absorption tower 2 is overhauled, the circulating liquid at the bottom of the absorption tower is discharged into the pit 10 through the pipeline, and after sedimentation in the pit 10, the upper clear liquid is pumped to the waste liquid tank 11 for storage.

[0016] Preferably, the waste liquid tank 11 is provided with two liquid outlet pipes, one of which is connected to the waste liquid recycling system, and the other is equipped with a waste liquid pump 12 and connected to a sewage treatment station, and both liquid outlet pipes are equipped with valves.

[0017] Preferably, all connecting pipes are made of fiberglass, and the acid mist exhaust gas is collected through the fiberglass pipe and the induced draft fan 1 and then enters the absorption tower 2. The acid mist exhaust gas enters from the lower end of the tower and flows upward, and contacts the 5% alkali solution sprayed under the top of the tower in reverse. The acid mist reacts with the liquid alkali to generate sodium sulfate, which enters the purification circulating liquid. After the flue gas is purified, it is discharged from the exhaust chimney on the top of the tower in compliance with the standards.

[0018] Furthermore, in order to ensure that the purification efficiency reaches 95%, a pH meter is installed on the washing liquid circulation pipeline to control the pH value to be above 7. When the pH value is less than 7, liquid alkali is added to the purification tower through the pump of the liquid alkali tank 9.

Claims

1. A copper electrolytic acid mist treatment system, characterized by: The absorption tower comprises an absorption tower, a liquid alkali tank and a waste liquid tank. The bottom end of the absorption tower is filled with absorption liquid, the upper end is equipped with a spray device, and the top end is provided with a tail gas pipe. The lower end of the side wall of the absorption tower is provided with an air inlet, the outer end of the air inlet is connected to an induced draft fan, and the outer end of the induced draft fan is connected to an acid mist waste gas collection pipe. A circulation pump is installed at the bottom of the absorption tower. The circulation pump is used to pump the absorption liquid into the spray device. The outlet end of the liquid alkali tank is connected to the liquid inlet end of the circulation pump. The liquid outlet end of the circulation pump is provided with two pipes, which are respectively connected to the spray device and the waste liquid tank. Both pipes are equipped with valves. It also includes a water tank, the outlet end of the water tank is equipped with a flushing pump, and the absorption tower is provided with a flushing device above the spraying device, and the flushing device is connected to the flushing pump; The circulation pump and the water tank are both provided with a water supply port, which is connected to the production water source through a pipeline; The invention also comprises a pit, the inlet of the pit is connected to the bottom of the absorption tower through a pipeline, the pit is equipped with a pit pump, and the output end of the pit pump is connected to the waste liquid tank through a pipeline.

2. A copper electrolytic acid mist disposal system according to claim 1, characterized in that: The waste liquid tank is provided with two liquid outlet pipes, one of which is connected to the waste liquid recycling system, and the other is equipped with a waste liquid pump and is connected to the sewage treatment station.

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