CN110776159A - Chromium-plated steel plate wastewater recycling system - Google Patents
Chromium-plated steel plate wastewater recycling system Download PDFInfo
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- CN110776159A CN110776159A CN201911231627.7A CN201911231627A CN110776159A CN 110776159 A CN110776159 A CN 110776159A CN 201911231627 A CN201911231627 A CN 201911231627A CN 110776159 A CN110776159 A CN 110776159A
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- chromium
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/38—Treatment of water, waste water, or sewage by centrifugal separation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/48—Treatment of water, waste water, or sewage with magnetic or electric fields
- C02F1/488—Treatment of water, waste water, or sewage with magnetic or electric fields for separation of magnetic materials, e.g. magnetic flocculation
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
- C02F2001/422—Treatment of water, waste water, or sewage by ion-exchange using anionic exchangers
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/42—Treatment of water, waste water, or sewage by ion-exchange
- C02F2001/425—Treatment of water, waste water, or sewage by ion-exchange using cation exchangers
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/10—Inorganic compounds
- C02F2101/20—Heavy metals or heavy metal compounds
- C02F2101/22—Chromium or chromium compounds, e.g. chromates
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/16—Nature of the water, waste water, sewage or sludge to be treated from metallurgical processes, i.e. from the production, refining or treatment of metals, e.g. galvanic wastes
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/06—Controlling or monitoring parameters in water treatment pH
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Treatment Of Water By Ion Exchange (AREA)
Abstract
The invention belongs to the technical field of chromium-plated steel plate production, and particularly relates to a chromium-plated steel plate wastewater recycling system which comprises a wastewater recycling sedimentation tank, wherein the wastewater recycling sedimentation tank is connected with a wastewater recycling groove on a production line through a pipeline, wastewater precipitated in the wastewater recycling sedimentation tank enters a pretreatment device, chromium ions in the wastewater are subjected to primary adsorption through the pretreatment device, 10 percent of metal ions in the wastewater are adsorbed and removed, then the wastewater enters a first cation exchange column, metal cations in the chromium-plated wastewater are exchanged with exchangeable ions in the first cation exchange column, the metal ions are adsorbed on chromium-plated resin, so that 80 percent of metal ions in the chromium-plated wastewater are removed, then the chromium-plated wastewater enters an anion exchange tank, the anions in the wastewater and the anion exchange tank are removed, finally precipitation separation is carried out to obtain purified water and chromium, the chromium is recycled, and the online recycling and the recycling of the chromium-plated steel plate wastewater are realized, does not cause secondary pollution, reduces the treatment cost of the wastewater and improves the utilization rate of chromium resources.
Description
Technical Field
The invention relates to the technical field of production of chromium-plated steel plates, in particular to a chromium-plated steel plate wastewater recycling system.
Background
Chrome-plated Steel sheets are one of the most important classes of Tin-Free Steel sheets (TFS). Compared with tin-plated steel plates, the chromium-plated plate has the advantages of small plating amount, low production cost, good paint adhesion, good temperature resistance, good sulfur resistance, good corrosion resistance and the like, and replaces tin-plated iron to a great extent in the aspect of packaging materials, so that the chromium-plated plate is widely applied to metal packaging materials in the food, light industry and chemical industry.
So far, the treatment of chromium-containing wastewater, except for an ion exchange method, has not solved the problem of secondary pollution of chromium-plating wastewater, namely the problem of secondary pollution of solid chromium to the environment caused by impurities contained in the recovered chromium compound, non-conformity with the quality requirements of industrial products and no commodity use value. However, the ion exchange method is not widely used because of its high primary investment, complicated operation and management, and high cost. How to solve the above problems is a need to be solved.
Disclosure of Invention
The invention aims to provide a chromium-plated steel plate wastewater recycling system, which strictly prevents interference substances from permeating, ensures the quality of the recycled chromium compound, reaches the industrial quality standard, has commodity use value, is repeatedly used for chromium plating, and thoroughly eliminates the pollution of chromium ions in chromium plating wastewater to the environment.
In order to achieve the above purpose, the embodiment of the present invention adopts the following technical solutions:
the embodiment of the invention provides a chromium-plated steel plate wastewater recycling system, which comprises:
the wastewater recovery sedimentation tank is connected with a wastewater recovery tank on the production line through a pipeline;
the pretreatment device comprises a pretreatment tank and an adsorption layer which divides the pretreatment tank into an upper chamber and a lower chamber and adsorbs suspended matters in wastewater, wherein a partition plate is arranged below the adsorption layer, a water outlet hole is formed in the partition plate, and a first cation exchange column is connected below the water outlet hole; a stirring device is arranged in the upper cavity;
the anion exchange tank is connected with the first cation exchange column through a pipeline, then an interlayer which partitions the anion exchange tank into a plurality of filter chambers is arranged in the anion exchange tank, the interlayer is formed by processing a honeycomb PVC plate, the honeycomb PVC plate is filled with a lignosulphonate resin layer, and the PH value of the wastewater in the anion exchange tank is ensured to be 3-5 in the whole exchange process;
the chromium-containing eluent post-treatment device is provided with a second cation exchange column filled with cation exchange resin, an inlet of the second cation exchange column is connected with an outlet of the anion exchange tank through a pipeline, and an outlet of the second cation exchange column is connected to the precipitation tank through a pipeline provided with a valve and a pump;
a centrifuge is arranged in the precipitation tank, the chromium-containing precipitate is separated from the mother liquor by the centrifuge, and the separated purified water contains 0.5mg/L of CrO;
carrying out closed circulation on the separated purified water, and repeatedly using the purified water for rinsing;
and (3) washing the separated chromium-containing precipitate for multiple times by using water to obtain a pure chromium compound product, wherein the pure chromium compound product can be repeatedly used in a chromium plating process.
Furthermore, the import of waste water recovery sedimentation tank is provided with the buffer board, is suitable for to the water that gets into waste water recovery sedimentation tank to cushion and fall to the sedimentation tank surface.
Further, the adsorption layer is prepared by compounding magnetic nanoparticles and graphene oxide, and a PVC waterproof film layer is attached to the outer surface of the magnetic adsorption layer.
Compared with the prior art, the embodiment of the invention has the following beneficial effects: the system realizes chromium recovery, chromium recycling and water recycling, realizes the on-line recovery and recycling of chromium-containing wastewater of the chromium-plated thin steel plate, does not cause secondary pollution, reduces the treatment cost of the wastewater and improves the utilization rate of chromium resources.
Drawings
The invention is further illustrated with reference to the following figures and examples.
FIG. 1 is a schematic view of the flow structure of the present invention.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.
Referring to fig. 1, a system for recycling wastewater from chrome-plated steel plate includes: the wastewater recovery sedimentation tank 1 is connected with a wastewater recovery tank on a production line through a pipeline and is used for collecting chromium-containing wastewater and precipitating the chromium-containing wastewater to ensure that heavier impurities are precipitated at the bottom of the sedimentation tank 1 for preliminary cleaning, and in order to reduce the impact force brought to precipitates at the bottom of the sedimentation tank when the wastewater enters the sedimentation tank 1, a buffer plate 11 is arranged at an inlet of the wastewater recovery sedimentation tank 1 and is suitable for buffering the water entering the wastewater recovery sedimentation tank and falling to the surface of the sedimentation tank, so that the precipitated impurities are prevented from causing the wastewater to become turbid again due to the impact force;
the pretreatment device 2 comprises a pretreatment tank 21 and an adsorption layer 23 which divides the pretreatment tank 21 into an upper cavity 211 and a lower cavity 212 and adsorbs suspended matters in wastewater, wherein a partition plate 24 is arranged below the adsorption layer 23, a water outlet hole 241 is formed in the partition plate 24, and a first cation exchange column 25 is connected below the water outlet hole 241; be provided with agitating unit in the epicoele 211, in the waste water of coming out in waste water recovery pond 1, its heavier impurity of quality has already precipitated, and then get into pretreatment tank 21 in, adsorbed layer 23 includes that magnetic nanoparticle and graphene oxide are compound to be prepared and forms, and will have PVC waterproof membrane layer at the surface adhesion of magnetic adsorption layer, can adsorb 10% metal ion, then enter into first cation exchange column 25, the Fe among the chromium-containing waste water of ion exchange process
3+、Cr
3+、Cu
2+、Pb
2+The metal cations exchange with exchangeable ions (such as H +) in the first cation exchange column 25, the metal ions are adsorbed on the resin, and the H + ions enter the solution, so that the metal ions in the wastewater are further removed;
the upper cavity 211 is internally provided with a stirring device 4 for uniformly stirring the wastewater, so that the wastewater can uniformly enter the adsorption layer 23, and the adsorption uniformity is improved;
the anion exchange tank 3 is connected with the first cation exchange column 25 through a pipeline, then an interlayer 32 which partitions the anion exchange tank into a plurality of filter chambers 31 is arranged in the anion exchange tank 3, the interlayer 32 is formed by processing a honeycomb-shaped PVC plate, and the honeycomb-shaped PVC plate is filled with a lignosulphonate resin layer, SO that the pH value of the wastewater in the anion exchange tank 3 is ensured to be 3-5 in the whole exchange process, the removal of anions (such as Cr2O 72-, CrO 42-, SO 42-) in the wastewater is further improved, and the acidic liquid is beneficial to the adsorption effect of the lignosulphonate resin layer;
the chromium-containing eluent post-processing device 5 is provided with a second cation exchange column 51 filled with cation exchange resin, the inlet of the second cation exchange column 51 is connected with the outlet of an anion exchange pool through a pipeline, and the outlet of the second cation exchange column 51 is connected to the precipitation tank 6 through a pipeline provided with a valve and a pump; a centrifuge is arranged in the precipitation tank 6, the chromium-containing precipitate is separated from the mother liquor by the centrifuge, and the separated purified water contains 0.5mg/L of CrO & lt/5 & gt;
carrying out closed circulation on the separated purified water, and repeatedly using the purified water for rinsing;
and (3) washing the separated chromium-containing precipitate for multiple times by using water to obtain a pure chromium compound product, wherein the pure chromium compound product can be repeatedly used in a chromium plating process.
In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (3)
1. The utility model provides a chromium plate waste water recovery system of recycling which characterized in that includes:
the wastewater recovery sedimentation tank is connected with a wastewater recovery tank on the production line through a pipeline;
the pretreatment device comprises a pretreatment tank and an adsorption layer which divides the pretreatment tank into an upper chamber and a lower chamber and adsorbs suspended matters in wastewater, wherein a partition plate is arranged below the adsorption layer, a water outlet hole is formed in the partition plate, and a first cation exchange column is connected below the water outlet hole; a stirring device is arranged in the upper cavity;
the anion exchange tank is connected with the first cation exchange column through a pipeline, then an interlayer which partitions the anion exchange tank into a plurality of filter chambers is arranged in the anion exchange tank, the interlayer is formed by processing a honeycomb PVC plate, the honeycomb PVC plate is filled with a lignosulphonate resin layer, and the PH value of the wastewater in the anion exchange tank is ensured to be 3-5 in the whole exchange process;
the chromium-containing eluent post-treatment device is provided with a second cation exchange column filled with cation exchange resin, an inlet of the second cation exchange column is connected with an outlet of the anion exchange tank through a pipeline, and an outlet of the second cation exchange column is connected to the precipitation tank through a pipeline provided with a valve and a pump;
a centrifuge is arranged in the precipitation tank, the chromium-containing precipitate is separated from the mother liquor by the centrifuge, and the separated purified water contains 0.5mg/L of CrO;
carrying out closed circulation on the separated purified water, and repeatedly using the purified water for rinsing;
and (3) washing the separated chromium-containing precipitate for multiple times by using water to obtain a pure chromium compound product, wherein the pure chromium compound product can be repeatedly used in a chromium plating process.
2. The chromium-plated steel plate wastewater recycling system according to claim 1,
the import of waste water recovery sedimentation tank is provided with the buffer board, is suitable for to the water that gets into waste water recovery sedimentation tank to cushion and fall to the sedimentation tank surface.
3. The chromium-plated steel plate wastewater recycling system according to claim 1,
the adsorption layer is prepared by compounding magnetic nanoparticles and graphene oxide, and a PVC waterproof film layer is attached to the outer surface of the magnetic adsorption layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911231627.7A CN110776159A (en) | 2019-12-05 | 2019-12-05 | Chromium-plated steel plate wastewater recycling system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911231627.7A CN110776159A (en) | 2019-12-05 | 2019-12-05 | Chromium-plated steel plate wastewater recycling system |
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| CN110776159A true CN110776159A (en) | 2020-02-11 |
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| CN201911231627.7A Pending CN110776159A (en) | 2019-12-05 | 2019-12-05 | Chromium-plated steel plate wastewater recycling system |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106492761A (en) * | 2016-11-01 | 2017-03-15 | 河南工业大学 | A kind of preparation method of magnetic hydrogel microsphere |
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2019
- 2019-12-05 CN CN201911231627.7A patent/CN110776159A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106492761A (en) * | 2016-11-01 | 2017-03-15 | 河南工业大学 | A kind of preparation method of magnetic hydrogel microsphere |
Non-Patent Citations (1)
| Title |
|---|
| 王光辉著: "《水处理工程（上册）》", 31 January 2015, 中国环境出版社 * |
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Address after: 223600 No. 11 Cixi Road, Shuyang Economic Development Zone, Suqian, Jiangsu. Applicant after: Jiangsu Suxun New Material Technology Co.,Ltd. Address before: 223600 No. 11 Cixi Road, Shuyang Economic Development Zone, Suqian, Jiangsu. Applicant before: JIANGSU SUXUN NEW MATERIAL TECHNOLOGY Co.,Ltd. |
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Application publication date: 20200211 |
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