Collaborative recovery treatment system for acidic copper-containing waste liquid and aluminum mud

Abstract

The utility model relates to an acidic copper-containing waste liquid and aluminum mud collaborative recovery processing system which comprises an acidic copper-containing waste liquid collecting tank, the acidic copper-containing waste liquid collecting tank is sequentially connected with a first filter and a preheater, one outlet of the preheater is connected with a condenser, and the other outlet of the preheater is sequentially connected with a multi-effect evaporator, a transfer tank, a washer and a second filter. The second filter is respectively connected with a sodium chloride solution storage tank and a copper sulfate preparation unit. According to the recovery treatment system, the acidic copper-containing waste liquid generated in the production process of the printed circuit board and the aluminum mud generated in the surface treatment industry are cooperatively treated, so that the recovery treatment efficiency is favorably improved, resource utilization is realized, and economic benefits are achieved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to surface treatment waste technical field, concretely relates to a kind of acid copper-containing waste liquid, aluminium mud is handled in cooperation with recovery system. BACKGROUND

[0002] Acid copper-containing waste liquid is produced in the process of circuit board preparation, and the waste liquid is a kind of industrial wastewater with high copper content and high acidity produced in the process of pattern transfer manufacturing, which is a typical dangerous liquid waste, but the waste is also a high-priced composite resource, and has great potential in resource recovery and etching regeneration related technologies.

[0003] At the same time, a large amount of aluminum sludge will be produced in the surface treatment industry such as metal surface treatment and heat treatment, and a large amount of aluminum sludge will cause great harm to the environment. Aluminum sludge is radioactive and can cause air pollution, groundwater pollution, and damage to building surfaces and soil. If not properly disposed of and strictly controlled, it will inevitably have a serious impact on the environment and human health.

[0004] In the prior art, acid copper-containing waste liquid and aluminum sludge are generally recovered and treated separately, and there is no related patent that combines acid copper-containing waste liquid and aluminum sludge. SUMMARY

[0005] The utility model discloses a kind of acid copper-containing waste liquid, aluminium mud is handled in cooperation with recovery system, with high processing efficiency, controllability, low processing cost, no wastewater generation, simultaneously recovery cuprous chloride, sodium chloride and water, so that resource is reasonably utilized, with environmental protection benefit and economic benefit.

[0006] The utility model discloses the technical scheme for solving above-mentioned problem as follows: a kind of acid copper-containing waste liquid, aluminium mud is handled in cooperation with recovery system, the recovery processing system includes containing acid copper-containing waste liquid collection tank, the acid copper-containing waste liquid collection tank is sequentially connected first filter, preheater, the preheater one outlet is connected condenser, the preheater other outlet is sequentially connected multiple-effect evaporator, transfer tank, scrubber, second filter, the second filter is connected sodium chloride solution storage tank and copper sulfate preparation unit respectively.

[0007] The recovery processing system further includes aluminum sludge collection tank, the aluminum sludge collection tank is connected acidification reactor, the acidification reactor is connected sedimentation tank and the condenser respectively, the sedimentation tank is sequentially connected first filter press, evaporation concentration chamber, and the evaporation concentration chamber is further connected crystalline aluminum chloride preparation unit and liquid polyaluminum chloride preparation unit respectively.

[0008] Preferably, the multiple-effect evaporator is provided with a steam inlet and a steam outlet, the steam inlet is connected to a steam pipeline, and the steam outlet is connected to the condenser.

[0009] Preferably, the multi-effect evaporator is a three-effect evaporator, including a one-effect evaporator, a two-effect evaporator and a three-effect evaporator; the steam inlet of the one-effect evaporator is connected with a steam pipeline, the steam outlet of the one-effect evaporator is connected with the steam inlet of the two-effect evaporator through a pipeline, the steam outlet of the two-effect evaporator is connected with the steam inlet of the three-effect evaporator through a pipeline, and the steam outlet of the three-effect evaporator is connected with the condenser through a pipeline; the material inlet of the three-effect evaporator is connected with the preheater through a pipeline, the material outlet of the three-effect evaporator is connected with the material inlet of the two-effect evaporator through a pipeline, and the material outlet of the two-effect evaporator is connected with the material inlet of the one-effect evaporator through a pipeline.

[0010] Preferably, the sodium chloride solution storage tank is further connected with a sodium chloride solid preparation unit.

[0011] Preferably, the acidification reaction kettle is provided with a spiral stirring paddle.

[0012] Preferably, the crystalline aluminum chloride preparation unit comprises a crystallizer, a centrifuge and an aluminum chloride crystal storage tank connected in sequence.

[0013] Preferably, the liquid polyaluminum chloride preparation unit comprises a polymerization reaction kettle, a second filter press and a liquid polyaluminum chloride storage tank connected in sequence.

[0014] Compared with the prior art, the utility model has the advantages that:

[0015] The recycling system can cooperatively treat acidic copper-containing waste liquid generated in the production process of printed circuit boards and aluminum mud generated in the surface treatment industry, thereby improving the recycling efficiency, realizing resource utilization and having economic benefits. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 FIG. 1 is a structural schematic view of an acidic copper-containing waste liquid and aluminum mud cooperative recycling system according to an embodiment of the utility model.

[0017] In the figure, 1 is an acidic copper-containing waste liquid collection tank, 2 is a first filter, 3 is a preheater, 4 is a condenser, 5 is a multi-effect evaporator, 5-1 is a steam inlet, 5-2 is a steam outlet, 6 is a transfer tank, 7 is a scrubber, 8 is a second filter, 9 is a sodium chloride solution storage tank, 10 is a copper sulfate preparation unit, 11 is an aluminum mud collection tank, 12 is an acidification reaction kettle, 13 is a sedimentation tank, 14 is a first filter press, 15 is an evaporation and concentration chamber, 16 is a crystalline aluminum chloride preparation unit, 16-1 is a crystallizer, 16-2 is a centrifuge, 16-3 is an aluminum chloride crystal storage tank, 17 is a liquid polyaluminum chloride preparation unit, 17-1 is a polymerization reaction kettle, 17-2 is a second filter press and 17-3 is a liquid polyaluminum chloride storage tank. DETAILED DESCRIPTION

[0018] The utility model will be described in further detail below in combination with the drawings.

[0019] As Figure 1 The structure diagram of the acid copper-containing waste liquid and aluminum mud cooperative recovery treatment system in the embodiment is shown.

[0020] An acid copper-containing waste liquid and aluminum mud cooperative recovery treatment system, the recovery treatment system comprises an acid copper-containing waste liquid collecting tank 1, the acid copper-containing waste liquid collecting tank 1 is sequentially connected with a first filter 2 and a preheater 3, one outlet of the preheater 3 is connected with a condenser 4, and the other outlet of the preheater 3 is sequentially connected with a multi-effect evaporator 5, a transfer tank 6, a scrubber 7 and a second filter 8; the second filter 8 is respectively connected with a sodium chloride solution storage tank 9 and a copper sulfate preparation unit 10.

[0021] The recovery treatment system further comprises an aluminum mud collecting tank 11, the aluminum mud collecting tank 11 is connected with an acidification reaction kettle 12, the acidification reaction kettle 12 is respectively connected with a precipitation tank 13 and the condenser 4, the precipitation tank 13 is sequentially connected with a first filter press 14 and an evaporation and concentration chamber 15, the evaporation and concentration chamber 15 is further respectively connected with a crystalline aluminum chloride preparation unit 16 and a liquid polymeric aluminum chloride preparation unit 17, the crystalline aluminum chloride preparation unit 16 comprises a crystallizer 16-1, a centrifugal machine 16-2 and an aluminum chloride crystal storage tank 16-3 connected in sequence, and the liquid polymeric aluminum chloride preparation unit 17 comprises a polymerization reaction kettle 17-1, a second filter press 17-2 and a liquid polymeric aluminum chloride storage tank 17-3 connected in sequence.

[0022] The multi-effect evaporator 5 is provided with a steam inlet 5-1 and a steam outlet 5-2, the steam inlet 5-1 is connected with a steam pipeline, and the steam outlet 5-2 is connected with the condenser 4; the multi-effect evaporator 5 is a three-effect evaporator, comprising a one-effect evaporator, a two-effect evaporator and a three-effect evaporator; the one-effect evaporator steam inlet (i.e. the steam inlet 5-1 of the multi-effect evaporator 5) is connected with the steam pipeline, the one-effect evaporator steam outlet is connected with the two-effect evaporator steam inlet through a pipeline, the two-effect evaporator steam outlet is connected with the three-effect evaporator steam inlet through a pipeline, and the three-effect evaporator steam outlet is connected with the condenser 4 through a pipeline; the three-effect evaporator material inlet is connected with the preheater 3 through a pipeline, the three-effect evaporator material outlet is connected with the two-effect evaporator material inlet through a pipeline, and the two-effect evaporator material outlet is connected with the one-effect evaporator material inlet through a pipeline.

[0023] In addition, the acidification reaction kettle 12 is provided with a spiral stirring paddle.

[0024] The working process of the embodiment will be described in detail below in combination with the drawings:

[0025] The acidic copper-containing waste liquid in the acidic copper-containing waste liquid collecting tank 1 enters the first filter 2 through a pipeline to remove solid impurities in the waste liquid, and then enters the preheater 3 to preliminarily heat the waste liquid, and the acid mist waste gas HCl generated in the process enters the condenser 4; the preliminarily heated waste liquid enters the multi-effect evaporator 5 to evaporate and concentrate, and in the process, the steam in the steam pipeline enters the multi-effect evaporator 5 from the steam inlet 5-1, and the residual heat in the steam and the generated acid mist waste gas HCl enter the condenser 4 through the steam outlet 5-2; the waste liquid after evaporation and concentration enters the transfer tank 6, and then is washed by the scrubber 7 and filtered by the second filter 8 to obtain purified basic copper chloride and sodium chloride solution, which enter the copper sulfate preparation unit 10 and the sodium chloride solution storage tank 9, respectively.

[0026] The aluminum mud in the aluminum mud collecting tank 11 and the hydrochloric acid solution in the condenser 4 enter the acidification reaction kettle 12, and the aluminum mud and the hydrochloric acid solution react in the acidification reaction kettle 12 to obtain aluminum chloride; after the reaction is completed, the reaction mixture enters the precipitation tank 13, and a heavy metal capturing agent is added; the heavy metal capturing agent reacts with Cu 2+ , Cd 2+ , Hg 2+ , Pb 2+ , Mn 2+ , Ni 2+ , Zn 2+ , Cr 3+ and other heavy metal ions in the mixed solution to generate a precipitate, which is removed by the first filter press 14, and the filtrate is evaporated and concentrated in the evaporation and concentration chamber 15; part of the evaporation and concentration liquid enters the crystalline aluminum chloride preparation unit 16, and the other part enters the liquid polymeric aluminum chloride preparation unit 17.

[0027] The evaporation and concentration liquid entering the crystalline aluminum chloride preparation unit 16 is crystallized in the crystallizer 16-1 and centrifuged in the centrifugal machine 16-2 to obtain aluminum chloride crystals, which are stored in the aluminum chloride crystal storage tank 16-3; the evaporation and concentration liquid entering the liquid polymeric aluminum chloride preparation unit 17 is subjected to polymerization reaction in the polymerization reaction kettle 17-1 and pressure filtration in the second filter press 17-2 to obtain liquid polymeric aluminum chloride, which is stored in the liquid polymeric aluminum chloride storage tank 17-3.

[0028] In addition to the above-mentioned embodiments, the utility model also includes other implementation manners, and any technical solution formed by equivalent transformation or equivalent replacement shall fall within the protection scope of the utility model claim.

Claims

1. A system for the co-recovery and treatment of acidic copper-containing wastewater and aluminum sludge, characterized in that: The recycling system includes an acidic copper-containing waste liquid collection tank (1), which is connected in sequence to a first filter (2) and a preheater (3). One outlet of the preheater (3) is connected to a condenser (4), and the other outlet of the preheater (3) is connected in sequence to a multi-effect evaporator (5), a transfer tank (6), a scrubber (7), and a second filter (8). The second filter (8) is connected to a sodium chloride solution storage tank (9) and a copper sulfate preparation unit (10). The recycling system also includes an aluminum mud collection tank (11), which is connected to an acidification reactor (12). The acidification reactor (12) is connected to a sedimentation tank (13) and a condenser (4). The sedimentation tank (13) is connected to a first filter press (14) and an evaporation and concentration chamber (15) in sequence. The evaporation and concentration chamber (15) is also connected to a crystalline aluminum chloride preparation unit (16) and a liquid polyaluminum chloride preparation unit (17).

2. The acidic copper-containing wastewater and aluminum sludge co-recovery and treatment system according to claim 1, characterized in that: The multi-effect evaporator (5) is provided with a steam inlet (5-1) and a steam outlet (5-2). The steam inlet (5-1) is connected to a steam pipe, and the steam outlet (5-2) is connected to the condenser (4).

3. The acidic copper-containing wastewater and aluminum sludge co-recovery and treatment system according to claim 1, characterized in that: The multi-effect evaporator (5) is a three-effect evaporator, including a first-effect evaporator, a second-effect evaporator and a third-effect evaporator.

4. The acidic copper-containing wastewater and aluminum sludge co-recovery and treatment system according to claim 1, characterized in that: The sodium chloride solution storage tank (9) is also connected to a sodium chloride solid preparation unit.

5. The acidic copper-containing wastewater and aluminum sludge co-recovery and treatment system according to claim 1, characterized in that: The acidification reactor (12) is equipped with a spiral stirring paddle.

6. The co-processing system for acidic copper-containing wastewater and aluminum sludge according to claim 1, characterized in that: The crystalline aluminum chloride preparation unit (16) includes a crystallizer (16-1), a centrifuge (16-2), and an aluminum chloride crystal storage tank (16-3) connected in sequence.

7. The acidic copper-containing wastewater and aluminum sludge co-recovery and treatment system according to claim 1, characterized in that: The liquid polyaluminum chloride preparation unit (17) includes a polymerization reactor (17-1), a filter press (17-2), and a liquid polyaluminum chloride storage tank (17-3) connected in sequence.

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