PCB copper ammonia wastewater treatment device

Abstract

The utility model discloses a PCB (printed circuit board) copper ammonia wastewater treatment device which comprises an adjusting tank, the adjusting tank is sequentially connected with a complex breaking reaction tank, a coagulative precipitation tank, an MAP (micro-ammonium phosphate) precipitation tank and a chlorination tank, both the coagulative precipitation tank and the MAP precipitation tank are led to a sludge concentration tank, the sludge concentration tank is connected with a filter press through a pump body, and the filter press is connected with a water pump. The complex breaking reaction tank, the coagulative precipitation tank, the MAP precipitation tank and the chlorination tank are connected with the same dosing assembly. According to the utility model, ferrous sulfate is added into the wastewater under an acidic condition to break complex of copper ammonia complex ions, and then the pH value is adjusted to 9-10, so that copper ions form copper hydroxide precipitates to be removed; magnesium chloride and sodium dihydrogen phosphate are added to react to form magnesium ammonium phosphate precipitates, a small amount of residual copper ions continue to generate copper phosphate precipitates, and most of ammonia nitrogen and copper ions are removed after the formed precipitates are coagulated and precipitated through PAC and PAM, so that the removal rate of the copper ions in the copper ammonia wastewater is greatly increased.

Description

Technical Field

[0001] The utility model relates to the technical field of wastewater, in particular to a PCB copper ammonia wastewater treatment device. Background Art

[0002] In the recycling process of waste printed circuit boards, a large amount of high-concentration copper-ammonia wastewater will be discharged. The copper-ammonia complex ion combination in the wastewater is extremely stable and more difficult to treat. Traditionally, chemical precipitation is used for removal, but its removal efficiency is low. For high-concentration copper-ammonia complex ion wastewater, the wastewater should be first broken to dissociate the copper ions in the copper-ammonia complex ion, and then the free copper should be removed by ordinary methods, and then the ammonia nitrogen in the wastewater should be removed. Utility Model Content

[0003] The utility model aims to solve the shortcomings in the prior art and proposes a PCB copper ammonia wastewater treatment device.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] The PCB copper ammonia wastewater treatment device comprises a regulating tank, which is sequentially connected to a complex breaking reaction tank, a coagulation sedimentation tank, a MAP sedimentation tank and a chlorination tank, the coagulation sedimentation tank and the MAP sedimentation tank both lead to a sludge thickening tank, the sludge thickening tank is connected to a filter press through a pump body, and the complex breaking reaction tank, the coagulation sedimentation tank, the MAP sedimentation tank and the chlorination tank are connected to the same dosing component.

[0006] Preferably, the dosing assembly includes a stepped frame and a mounting frame installed on the top thereof, a stirring barrel and a plurality of liquid storage barrels are respectively arranged on the stepped frame, a stirring mechanism is arranged in the stirring barrel, the stirring mechanism is installed on the mounting frame, the stirring barrel is connected to the liquid storage barrel through a multi-way pipe, and a plurality of independent valve bodies are arranged on the multi-way pipe, and the liquid storage barrel is respectively connected to the chelation breaking reaction tank, the coagulation sedimentation tank, the MAP sedimentation tank and the chlorination tank through an infusion pump.

[0007] Preferably, a flushing mechanism is installed on the side wall of the mixing barrel.

[0008] Preferably, a pH regulating mechanism is provided in the regulating tank.

[0009] Preferably, the filter press is connected to the regulating tank via a reflux pipe.

[0010] Compared with the prior art, the utility model has the following beneficial effects: the utility model adds ferrous sulfate to the wastewater under acidic conditions to break the copper ammonia complex ions, and then adjusts the pH to 9-10 so that the copper ions are formed into copper hydroxide precipitation for removal; by adding magnesium chloride and sodium dihydrogen phosphate, magnesium ammonium phosphate precipitation is formed by reaction, and a small amount of residual copper ions continue to generate copper phosphate precipitation, and the formed precipitate is coagulated and precipitated by PAC and PAM to remove most of the ammonia nitrogen and copper ions, thereby greatly improving the removal rate of copper ions in the copper ammonia wastewater. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more specifically and intuitively illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below.

[0012] Figure 1 The process flow chart proposed for this utility model;

[0013] Figure 2 The structure diagram of the dosing component proposed in the utility model Figure 1 ;

[0014] Figure 3 The structure diagram of the dosing component proposed in the utility model Figure 2 .

[0015] In the figure: ladder frame 1, mounting frame 2, stirring barrel 3, stirring mechanism 4, liquid storage barrel 5, multi-way pipe 6, valve body 7, infusion pump 8. DETAILED DESCRIPTION

[0016] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0017] Reference Figure 1-3 , PCB copper ammonia wastewater treatment device, including a regulating tank, the regulating tank is connected with a complex breaking reaction tank, a coagulation sedimentation tank, a MAP sedimentation tank and a chlorination tank in sequence, the coagulation sedimentation tank and the MAP sedimentation tank are both connected to a sludge thickening tank, the sludge thickening tank is connected with a filter press through a pump body, and the complex breaking reaction tank, the coagulation sedimentation tank, the MAP sedimentation tank and the chlorination tank are connected with the same dosing component.

[0018] The copper ammonia wastewater is first collected through pipelines and enters the equalization tank. After the wastewater is homogenized in the equalization tank, it is evenly lifted to the complex breaking reaction tank by the lifting pump. A pH adjustment is set at the front end of the complex breaking reaction so that the complex breaking reaction is carried out under pH 4-5 conditions.

[0019] Under acidic conditions, ferrous sulfate is added to the wastewater to break the copper-ammine complex ions, and then the pH is adjusted to 9-10 to allow the copper ions to form copper hydroxide precipitation for removal;

[0020] Magnesium chloride and sodium dihydrogen phosphate are added to the effluent to react and form magnesium ammonium phosphate precipitate, and a small amount of residual copper ions continue to form copper phosphate precipitate;

[0021] The formed precipitate is coagulated and precipitated by PAC and PAM to remove most of the ammonia nitrogen and copper ions;

[0022] The precipitated water is further treated with the breakpoint chlorination method to remove ammonia nitrogen and meet the discharge standards;

[0023] The generated sludge is concentrated in the sludge thickening tank and then dehydrated by the filter press, and the filtrate returns to the regulating tank.

[0024] In this embodiment, the dosing assembly includes a stepped frame 1 and a mounting frame 2 installed on the top thereof, a stirring barrel 3 and a plurality of liquid storage barrels 5 are respectively arranged on the stepped frame 1, a stirring mechanism 4 is arranged in the stirring barrel 3, and the stirring mechanism 4 is installed on the mounting frame 2, the stirring barrel 3 is connected to the liquid storage barrel 5 through a multi-way pipe 6, and a plurality of independent valve bodies 7 are arranged on the multi-way pipe 6, and the liquid storage barrel 5 is respectively connected to the chelation breaking reaction tank, the coagulation sedimentation tank, the MAP sedimentation tank and the chlorination tank through an infusion pump 8.

[0025] The reagents required for the decomposition reaction tank, coagulation sedimentation tank, MAP sedimentation tank and chlorination tank are mixed in batches in the stirring barrel 3 and discharged into the corresponding liquid storage barrel 5 using the independent valve body 7. When the reagents need to be added, the corresponding infusion pump 8 is started to transport them to the corresponding tank body, thereby simplifying the device.

[0026] In this embodiment, a flushing mechanism is installed on the side wall of the mixing barrel 3 to perform flushing after the reagents are mixed, thereby reducing the mutual influence between the reagents.

[0027] In this embodiment, a pH regulating mechanism is provided in the regulating tank.

[0028] In this embodiment, the filter press is connected to the regulating tank through a reflux pipe.

[0029] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. PCB copper ammonia wastewater treatment device, including a regulating tank, characterized in that: The regulating tank is connected to the decomposition reaction tank, the coagulation sedimentation tank, the MAP sedimentation tank and the chlorination tank in sequence. The coagulation sedimentation tank and the MAP sedimentation tank both lead to the sludge concentration tank. The sludge concentration tank is connected to the filter press through a pump body. The decomposition reaction tank, the coagulation sedimentation tank, the MAP sedimentation tank and the chlorination tank are connected to the same dosing component.

2. The PCB copper ammonia wastewater treatment device according to claim 1, characterized in that: The dosing assembly comprises a stepped frame (1) and a mounting frame (2) mounted on the top thereof, a stirring barrel (3) and a plurality of liquid storage barrels (5) are respectively arranged on the stepped frame (1), a stirring mechanism (4) is arranged in the stirring barrel (3), the stirring mechanism (4) is mounted on the mounting frame (2), the stirring barrel (3) is connected to the liquid storage barrel (5) via a multi-way pipe (6), and a plurality of independent valve bodies (7) are arranged on the multi-way pipe (6), and the liquid storage barrel (5) is respectively connected to a chelation breaking reaction tank, a coagulation sedimentation tank, a MAP sedimentation tank and a chlorination tank via an infusion pump (8).

3. The PCB copper ammonia wastewater treatment device according to claim 2, characterized in that: A flushing mechanism is installed on the side wall of the mixing barrel (3).

4. The PCB copper ammonia wastewater treatment device according to claim 3 is characterized in that: A pH regulating mechanism is provided in the regulating tank.

5. The PCB copper ammonia wastewater treatment device according to claim 4, characterized in that: The filter press is connected to the regulating tank through a reflux pipe.

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