Aluminum mud recovery device

Abstract

The utility model relates to an aluminum mud recovery device which comprises an aluminum mud collection chamber which is sequentially connected with a reaction tank, a first settling chamber, a filter press and an aluminum chloride collection chamber, an outlet of the aluminum chloride collecting chamber is connected with an evaporator which is sequentially connected with a crystallizer and a first filter, and an outlet of the first filter is further connected with an inlet of the evaporator. The other outlet of the aluminum chloride collecting chamber is connected with a polymerization chamber, the polymerization chamber is connected with a calcium aluminate storage tank, a basicity measuring chamber and a second settling chamber through electromagnetic valves, and the second settling chamber is connected with a curing chamber through a second filter. The aluminum mud recovery device disclosed by the utility model can be used for simultaneously preparing aluminum chloride hexahydrate crystals and liquid polyaluminum chloride, and the prepared liquid polyaluminum chloride is high in purity and basicity and is suitable for being applied to a water purifying agent.

Description

TECHNICAL FIELD

[0001] The utility model belongs to surface treatment waste technical field, concretely relates to a kind of aluminium paste recovery device. BACKGROUND

[0002] A large amount of aluminum sludge is generated in the surface treatment industry such as metal surface treatment and heat treatment. The large amount of aluminum sludge causes great harm to the environment. The aluminum sludge is radioactive, which causes air pollution, groundwater pollution, and damage to the surface of buildings and soil. If not properly disposed of and strictly controlled, it will inevitably have a serious impact on the environment and human health.

[0003] Currently, the reasonable disposal of aluminum sludge has been at the laboratory stage nationwide. Except for a small amount used for building materials, most of it is discarded or buried, which not only wastes land resources but also still causes serious harm to the soil and groundwater environment. Therefore, it is of great environmental value and good application prospect to reduce, harmlessly dispose of, or recycle aluminum sludge.

[0004] Chinese patent CN 107265581A discloses a method for preparing polyaluminum chloride water purifying agent from aluminum sludge. The method includes the following steps: reacting the aluminum sludge to be treated with a certain amount of hydrochloric acid, adding a certain amount of calcium aluminate and reacting for a period of time, then adding a certain amount of aluminum powder into the reaction system and reacting for a period of time, and finally separating the product to obtain liquid polyaluminum chloride water purifying agent. However, the patent has the following disadvantages: (1) it does not consider the pollution of other heavy metal ions in the aluminum sludge, which affects the performance and application of the final recovery product; (2) it converts aluminum in the aluminum sludge into liquid polyaluminum chloride water purifying agent, without considering the salt base, and consumes aluminum powder in the process, which is high in cost; (3) the calcium aluminate contains a certain amount of iron ions, and the polyaluminum chloride solution prepared in the patent contains a high amount of iron ions, which will inevitably affect the application range of polyaluminum chloride, especially in the application of drinking water treatment. SUMMARY

[0005] The utility model aims to provide a kind of aluminium paste recovery device, can simultaneously prepare six water aluminum chloride crystal and liquid polyaluminum chloride, and the liquid polyaluminum chloride prepared is high in purity, high in quality, and widely used.

[0006] The utility model discloses a technical scheme that solves the above problems adopts, and the technical scheme is as follows: a kind of aluminium mud recovery device, the recovery device includes aluminium mud collection chamber, the aluminium mud collection chamber is connected reaction tank, first settling chamber, filter press, aluminium chloride collection chamber in proper order;Aluminium chloride collection chamber one outlet is connected evaporator, the evaporator is sequentially connected with crystallizer, first filter, and the first filter outlet is also connected the evaporator import;Aluminium chloride collection chamber another outlet is connected polymerization chamber, and the polymerization chamber is respectively connected calcium aluminate storage tank, salt base degree determination chamber, second settling chamber via electromagnetic valve, and second settling chamber is connected curing chamber via second filter.

[0007] Preferably, the reaction tank, the polymerization chamber are all provided with stirring device, and the reaction tank is provided with feeding opening

[0008] Preferably, the first settling chamber is also connected heavy metal capture agent storage tank.

[0009] Preferably, the second settling chamber is also connected settling agent storage tank.

[0010] Preferably, the polymerization chamber is connected calcium aluminate storage tank via first electromagnetic valve, the polymerization chamber is connected salt base degree determination chamber via second electromagnetic valve, and the polymerization chamber is connected second settling chamber via third electromagnetic valve.

[0011] More preferably, the first electromagnetic valve, the second electromagnetic valve, the third electromagnetic valve are all connected with PLC controller.

[0012] Preferably, the polymerization chamber and the salt base degree determination chamber communication pipeline are provided with regulating valve.

[0013] Preferably, the bottom of the first settling chamber and the second settling chamber is provided with conical bottom, and the cone angle is 45 °.

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

[0015] In the utility model, aluminium mud recovery device can obtain aluminium chloride hexahydrate crystal and liquid polyaluminium chloride simultaneously, and avoid the pollution of heavy metal ions in the recovered product, wherein, the recovered liquid polyaluminium chloride has high purity, high salt base degree and high quality, avoids the influence of iron ions introduced by calcium aluminate, and is especially suitable for water purifying agent. ACCORDING TO THE DRAWINGS

[0016] Figure 1 It is a structure schematic view of aluminium mud recovery device in the utility model embodiment.

[0017] Wherein: 1 is aluminum mud collecting chamber, 2 is reaction tank, 3 is first settling chamber, 4 is filter press, 5 is aluminum chloride collecting chamber, 6 evaporator, 7 is crystallizer, 8 is first filter, 9 is polymerization chamber, 10 is calcium aluminate storage tank, 11 is salt base degree measuring chamber, 12 is second settling chamber, 13 is second filter, 14 is curing chamber, 14 is first electromagnetic valve, 15 is second electromagnetic valve, 16 is third electromagnetic valve. DETAILED DESCRIPTION

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

[0019] As Figure 1 The structure diagram of the aluminum mud recycling device in the embodiment is shown.

[0020] An aluminum mud recycling device, the recycling device comprising an aluminum mud collecting chamber 1, the aluminum mud collecting chamber 1 being connected in turn with a reaction tank 2, a first settling chamber 3, a filter press 4, and an aluminum chloride collecting chamber 5, the reaction tank 2 being provided with a feeding port, and the first settling chamber 3 being further connected with a heavy metal capturing agent storage tank.

[0021] The aluminum chloride collecting chamber 5 is connected with an evaporator 6 at one outlet, the evaporator 6 being connected in turn with a crystallizer 7 and a first filter 8, and the outlet of the first filter 8 being further connected with the inlet of the evaporator 6.

[0022] The aluminum chloride collecting chamber 5 is connected with a polymerization chamber 9 at another outlet, the polymerization chamber 9 being connected with a calcium aluminate storage tank 10, a salt base degree measuring chamber 11, and a second settling chamber 12 through electromagnetic valves, specifically, the polymerization chamber 9 is connected with the calcium aluminate storage tank 10 through a first electromagnetic valve 15, the polymerization chamber 9 is connected with the salt base degree measuring chamber 11 through a second electromagnetic valve 16, an adjusting valve 18 is arranged in the pipeline connecting the polymerization chamber 9 and the salt base degree measuring chamber 11, the polymerization chamber 9 is connected with the second settling chamber 12 through a third electromagnetic valve 17, and the first electromagnetic valve 15, the second electromagnetic valve 16, and the third electromagnetic valve 17 are all connected with a PLC controller.

[0023] The second settling chamber 12 is connected with a curing chamber 14 through a second filter 13, and the second settling chamber 12 is further connected with a settling agent storage tank, the settling agent being a mixture of thiosulfate polymer and modified polyacrylamide.

[0024] The reaction tank 2 and the polymerization chamber 9 are both provided with stirring devices, and the bottoms of the first settling chamber 3 and the second settling chamber 12 are both conical with a cone angle of 45°, which is more conducive to the separation of precipitates.

[0025] The working process of the embodiment will be described in detail below with the help of the accompanying drawings.

[0026] First, the aluminum mud in the aluminum mud collecting chamber 1 is added to the reaction tank 2, hydrochloric acid is added to the reaction tank 2 through the reaction tank 2 feeding port, and the aluminum mud and the hydrochloric acid react in the reaction tank 2 to obtain aluminum chloride, and after the reaction is completed, the reaction mixture enters the first settling chamber 3, the heavy metal capturing agent in the heavy metal capturing agent storage tank is added to the first settling chamber 3, and 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 mixture to form a precipitate, which is removed through a filter press 4, and the filtrate enters the aluminum chloride collecting chamber 5.

[0027] A part of the aluminum chloride solution in the aluminum chloride collecting chamber 5 is evaporated through an evaporator 6, crystallized through a crystallizer 7, and filtered through a first filter 8 to obtain aluminum chloride hexahydrate crystals, and in this process, the filtrate generated by the filtration is returned to the evaporator 6 for continuous evaporation.

[0028] Another part of the aluminum chloride solution in the aluminum chloride collecting chamber 5 enters the polymerization chamber 9, and at the same time, the first electromagnetic valve 15 is opened (at this time, the second electromagnetic valve 16 and the third electromagnetic valve 17 are closed), the calcium aluminate in the calcium aluminate storage tank 10 enters the polymerization chamber 9 for polymerization reaction, then the second electromagnetic valve 16 is opened (at this time, the first electromagnetic valve 15 and the third electromagnetic valve 17 are closed) and the regulating valve 18 is controlled, so that a certain amount of reaction liquid in the polymerization chamber 9 enters the salt base determination chamber 11 for salt base determination, if the salt base value is less than 70%, then the first electromagnetic valve 15 is opened again (at this time, the second electromagnetic valve 16 and the third electromagnetic valve 17 are closed) to add calcium aluminate, until the salt base value of the salt base determination chamber 11 is ≥70%, then the third electromagnetic valve 17 is opened (at this time, the first electromagnetic valve 15 and the second electromagnetic valve 16 are closed), so that the reaction liquid in the polymer enters the second settling chamber 12 to react with the settling agent (sulfonate polymer, modified polyacrylamide mixture) from the settling agent storage tank to obtain insoluble matter, and then the second filter 13 is used to remove the iron impurities introduced by the calcium aluminate, and finally the filtrate enters the curing chamber 14 for standing and curing to obtain liquid polyaluminum chloride.

[0029] In addition to the above-mentioned embodiments, the utility model also includes other implementation manners, and any technical solutions formed by equivalent transformation or equivalent replacement shall fall within the protection scope of the utility model claims.

Claims

1. A device for recovering aluminum sludge, characterized by: The recycling device includes an aluminum mud collection chamber (1), which is sequentially connected to a reaction tank (2), a first settling chamber (3), a filter press (4), and an aluminum chloride collection chamber (5); one outlet of the aluminum chloride collection chamber (5) is connected to an evaporator (6), which is sequentially connected to a crystallizer (7) and a first filter (8), and the outlet of the first filter (8) is also connected to the inlet of the evaporator (6); the other outlet of the aluminum chloride collection chamber (5) is connected to a polymerization chamber (9), which is connected to a calcium aluminate storage tank (10), a basicity measuring chamber (11), and a second settling chamber (12) via a solenoid valve, and the second settling chamber (12) is connected to a maturation chamber (14) via a second filter (13).

2. The device for recovering aluminum sludge according to claim 1, wherein: Both the reaction tank (2) and the polymerization chamber (9) are equipped with stirring devices, and the reaction tank (2) is equipped with a feeding port.

3. The apparatus for recovering aluminum paste according to claim 1, wherein: The first settling chamber (3) is also connected to a heavy metal trapping agent storage tank.

4. The apparatus for recovering aluminum paste according to claim 1, wherein: The second settling chamber (12) is also connected to a settling agent storage tank.

5. The apparatus for recovering aluminum paste according to claim 1, wherein: The polymerization chamber (9) is connected to the calcium aluminate storage tank (10) via the first solenoid valve (15), the polymerization chamber (9) is connected to the basicity measuring chamber (11) via the second solenoid valve (16), and the polymerization chamber (9) is connected to the second settling chamber (12) via the third solenoid valve (17).

6. The apparatus for recovering aluminum paste according to claim 5, wherein: The first solenoid valve (15), the second solenoid valve (16), and the third solenoid valve (17) are all connected to the PLC controller.

7. The apparatus for recovering aluminum paste according to claim 1, wherein: The pipeline connecting the polymerization chamber (9) and the basicity determination chamber (11) is equipped with a regulating valve (18).

8. The aluminum sludge recycling device according to claim 1, characterized in that: The bottom of both the first settling chamber (3) and the second settling chamber (12) is set as a cone bottom with a cone angle of 45°.

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