CN216236433U - Nickel plating waste liquid treatment device - Google Patents
Nickel plating waste liquid treatment device Download PDFInfo
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- CN216236433U CN216236433U CN202122912634.2U CN202122912634U CN216236433U CN 216236433 U CN216236433 U CN 216236433U CN 202122912634 U CN202122912634 U CN 202122912634U CN 216236433 U CN216236433 U CN 216236433U
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Abstract
The utility model provides a nickel plating waste liquid treatment device which comprises a reaction tank, a vacuum filtering mechanism arranged on one side of the reaction tank, an ammonia nitrogen stripping tower connected with the vacuum filtering mechanism, and an ammonia absorption tower connected with the ammonia nitrogen stripping tower, wherein a pH value regulator, a coagulant aid, a heavy metal agent and a phosphorus precipitation agent are arranged in the reaction tank. According to the nickel plating waste liquid treatment device, after heavy metals and phosphorus are deposited in the reaction tank, phosphorus and ammonia nitrogen are subjected to biochemical treatment, the nickel hydroxide is prevented from flowing into the ammonia nitrogen stripping tower through the vacuum filtering mechanism, the ammonia nitrogen is stripped in the ammonia nitrogen stripping tower, the ammonia is absorbed by the ammonia absorption tower, the phosphorus and the nickel are deposited, the ammonia is removed (stripped), and the discharged water quality reaches the primary standard of GB8978-1996 integrated wastewater discharge standard through biochemical treatment.
Description
Technical Field
The utility model relates to the technical field of wastewater treatment, in particular to a nickel plating waste liquid treatment device.
Background
The utility model discloses a nickel plating waste liquid adopts the utility model patent of multiple combination technology processing relates to environmental protection technical field. In the electroplating industry, when each bath of electroplating solution is electroplated to a certain degree, the bath of electroplating solution in the bath needs to be replaced and opened again to ensure the product quality
The pollution factor of the nickel plating waste liquid has four characteristics, namely four high and one low, the pH value of the waste liquid is low, the nickel content in the waste liquid is high (about 4000mg/L), the hypophosphorous content is high (about 2000mg/L), the ammonia nitrogen content is high (about 2000-3000 mg/L), and the COD content is high (more than 3000 mg/L). For example, in the production process, after the stock solution is directly discharged into a sewage treatment system for treatment, the water quality cannot reach the primary standard of GB8978-1996 integrated wastewater discharge standard. In the conventional wastewater treatment process, when heavy metals are used, the heavy metal content can reach the standard only when the heavy metals are about 100mg/L generally; lime, ferric trichloride or aluminum sulfate are generally used in the phosphorus precipitation process, and when the three chemicals are used for precipitating phosphorus, only aiming at normal phosphorus, the effect on hypophosphorous acid and phosphorous is almost not great, ammonia nitrogen in the waste liquid belongs to high ammonia nitrogen, and only low ammonia nitrogen wastewater can be treated in the conventional biochemical treatment process. If the waste liquid is sent out to the environment-friendly fixed-point unit treatment of industrial waste, the cost is high and the waste liquid is not mutually consistent sometimes, which affects the production.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a nickel plating waste liquid treatment device, which solves the problems that the existing nickel plating waste liquid treatment method is high in cost and cannot be mutually connected.
The utility model provides a nickel plating waste liquid treatment device which comprises a reaction tank, a vacuum filtering mechanism arranged on one side of the reaction tank, an ammonia nitrogen stripping tower connected with the vacuum filtering mechanism, and an ammonia absorption tower connected with the ammonia nitrogen stripping tower, wherein a pH value regulator, a coagulant aid, a heavy metal agent and a phosphorus precipitation agent are arranged in the reaction tank.
According to the nickel plating waste liquid treatment device, after heavy metals and phosphorus are deposited in the reaction tank, phosphorus and ammonia nitrogen are subjected to biochemical treatment, the nickel hydroxide is prevented from flowing into the ammonia nitrogen stripping tower through the vacuum filtering mechanism, the ammonia nitrogen is stripped in the ammonia nitrogen stripping tower, the ammonia is absorbed by the ammonia absorption tower, the phosphorus and the nickel are deposited, the ammonia is removed (stripped), and the discharged water quality reaches the primary standard of GB8978-1996 integrated wastewater discharge standard through biochemical treatment.
Further, the ammonia absorption tower is also connected with an induced draft fan.
Further, a stirring mechanism is arranged in the reaction tank.
Furthermore, a redox agent adding mechanism is arranged on one side of the reaction tank.
Furthermore, one side of the reaction tank is provided with a pH value adjusting mechanism.
Furthermore, one side of the reaction tank is provided with a heavy metal capture agent adding mechanism.
Furthermore, a coagulant aid adding mechanism is arranged on one side of the reaction tank.
Drawings
FIG. 1 is a nickel plating waste liquid treatment apparatus according to a first embodiment of the present invention;
FIG. 2 shows a nickel plating waste liquid treatment apparatus according to a second embodiment of the present invention.
Description of the main element symbols:
the following detailed description will further illustrate the utility model in conjunction with the above-described figures.
Detailed Description
To facilitate an understanding of the utility model, the utility model will now be described more fully with reference to the accompanying drawings. Several embodiments of the utility model are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1, a nickel plating waste liquid treatment apparatus according to a first embodiment of the present invention includes a reaction tank 10, a vacuum filtering mechanism 20 disposed at one side of the reaction tank 10, an ammonia nitrogen stripping tower 30 connected to the vacuum filtering mechanism 20, and an ammonia absorption tower 40 connected to the ammonia nitrogen stripping tower 30, wherein a PH regulator, a coagulant aid, a heavy metal agent, and a phosphorus deposition agent are disposed in the reaction tank 10.
According to the nickel plating waste liquid treatment device, after heavy metals and phosphorus deposition are carried out on the nickel plating waste liquid in the reaction tank 10, phosphorus and ammonia nitrogen are subjected to biochemical treatment, the nickel hydroxide is prevented from flowing into the ammonia nitrogen stripping tower 30 through the vacuum filtering mechanism 20, after the ammonia nitrogen stripping tower blows off the ammonia nitrogen, the ammonia is absorbed through the ammonia absorption tower 40, the phosphorus and the nickel are deposited, the ammonia is removed (stripping), and then the biochemical treatment is carried out, so that the discharged water quality finally reaches the primary standard of GB8978-1996 Integrated wastewater discharge Standard.
Specifically, in this embodiment, the reaction tank 10 is a fenton oxidation process, and by using the characteristic of low pH of the waste liquid containing nickel plating, ferrous sulfate and hydrogen peroxide are first added to oxidize the hypophosphorous acid in the waste liquid to form orthophosphoric acid, and the oxidation time is not less than 180 minutes; in the reduction process, lime is added to adjust the pH value to be about 12, so that phosphorus forms calcium phosphate precipitate, nickel ions form nickel hydroxide precipitate, at the moment, when the pH value is stabilized to be about 12, sodium sulfide serving as a heavy metal catching agent is supplemented, the nickel precipitate is completely obtained, and the reduction time is not less than 120 minutes. Because the sodium hydroxide precipitate particles are small, the addition polyacrylamide coagulant aid is beneficial to vacuum filtration.
Specifically, in this embodiment, the vacuum filtering mechanism 20 is a vacuum filter pump, and is intended to prevent nickel hydroxide from flowing into the ammonia nitrogen stripping tower 30 and finally flowing into the sewage adjusting tank, and because the electroplating industry wastewater is acidic, the nickel hydroxide precipitate will be re-dissolved in the acidic medium, and in addition, the nickel hydroxide precipitate and the calcium phosphate precipitate may clog the spray head of the stripping tower during the stripping process, which may finally result in poor stripping effect.
Specifically, in this embodiment, the stripping tower always ensures that the pH is above 11 during stripping, so as to ensure stripping effect and shorten stripping time, and during stripping, the pH of the waste liquid will gradually decrease, for example, when the pH decreases below 11, a little sodium hydroxide is properly added.
Specifically, in this embodiment, it is sufficient to always ensure that the pH is not more than 5 during the absorption in the ammonia absorption tower 40, and when the ammonium sulfate formed in the absorption liquid becomes saturated, the liquid is subjected to an external treatment, so that the amount of saturated ammonium sulfate formed is very small, and the ammonium sulfate can be used as an agricultural fertilizer.
Referring to fig. 2, a nickel plating waste liquid treatment apparatus according to a second embodiment of the present invention is different from the first embodiment in that the ammonia absorption tower 40 is further connected to an induced draft fan 50 in the second embodiment.
Specifically, in this embodiment, a stirring mechanism 60 is disposed in the reaction tank 10, so that the materials in the reaction tank 10 are uniformly mixed, and the operation convenience is improved.
Specifically, in the present embodiment, a redox agent adding mechanism 70 is disposed on one side of the reaction tank 10, so as to automatically add a redox agent, thereby improving the convenience of operation.
Specifically, in this embodiment, a PH adjusting mechanism 80 is disposed on one side of the reaction tank 10, so as to automatically add a PH adjusting agent, thereby improving the convenience of operation.
Specifically, in this embodiment, a heavy metal capture agent adding mechanism 90 is disposed on one side of the reaction tank 10, so as to automatically add the heavy metal capture agent, thereby improving the convenience of operation.
Specifically, in this embodiment, a coagulant aid adding mechanism 91 is disposed on one side of the reaction tank 10, so as to automatically add a coagulant aid, thereby improving the convenience of operation.
It can be understood that the discharge port of the material adding mechanism can be controlled to be switched on and off through the electromagnetic valve and then the PLC controller is used for controlling the on and off of the electromagnetic valve, and automatic discharging is achieved.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (7)
1. The nickel plating waste liquid treatment device is characterized by comprising a reaction tank, a vacuum filtering mechanism arranged on one side of the reaction tank, an ammonia nitrogen stripping tower connected with the vacuum filtering mechanism, and an ammonia absorption tower connected with the ammonia nitrogen stripping tower, wherein a pH value regulator, a coagulant aid, a heavy metal agent and a phosphorus precipitation agent are arranged in the reaction tank.
2. The apparatus for treating nickel plating waste liquid according to claim 1, wherein the ammonia absorption tower is further connected with an induced draft fan.
3. The apparatus for treating a nickel plating waste liquid according to claim 1, characterized in that a stirring mechanism is provided in the reaction tank.
4. The apparatus for treating a nickel plating waste liquid according to claim 1, wherein a redox agent adding mechanism is provided on one side of the reaction cell.
5. The apparatus for treating a nickel plating waste liquid according to claim 1, wherein a pH value adjusting mechanism is provided at one side of the reaction cell.
6. The apparatus for treating a nickel plating waste liquid according to claim 1, wherein a mechanism for adding a heavy metal capturing agent is provided on one side of the reaction cell.
7. The apparatus for treating a nickel plating waste liquid according to claim 1, wherein a coagulant aid adding mechanism is provided on one side of the reaction cell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122912634.2U CN216236433U (en) | 2021-11-25 | 2021-11-25 | Nickel plating waste liquid treatment device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122912634.2U CN216236433U (en) | 2021-11-25 | 2021-11-25 | Nickel plating waste liquid treatment device |
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| Publication Number | Publication Date |
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| CN216236433U true CN216236433U (en) | 2022-04-08 |
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| CN202122912634.2U Active CN216236433U (en) | 2021-11-25 | 2021-11-25 | Nickel plating waste liquid treatment device |
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| CN (1) | CN216236433U (en) |
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2021
- 2021-11-25 CN CN202122912634.2U patent/CN216236433U/en active Active
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