CN108191148B - Automatic purification system and purification method for coke copper wastewater - Google Patents
Automatic purification system and purification method for coke copper wastewater Download PDFInfo
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- CN108191148B CN108191148B CN201711481261.XA CN201711481261A CN108191148B CN 108191148 B CN108191148 B CN 108191148B CN 201711481261 A CN201711481261 A CN 201711481261A CN 108191148 B CN108191148 B CN 108191148B
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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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- 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
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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
- C02F1/46—Treatment of water, waste water, or sewage by electrochemical methods
- C02F1/461—Treatment of water, waste water, or sewage by electrochemical methods by electrolysis
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- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
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- 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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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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Abstract
The invention belongs to the technical field of wastewater treatment, and particularly relates to an automatic purification system and a purification method for coke copper wastewater. The invention provides an automatic purification system of coke copper wastewater, which comprises: the device comprises a wastewater detection unit, a control unit, a wastewater collection unit, an ion displacement unit, a first precipitation unit, an electrolytic complex breaking unit, a pH adjustment unit, a mixed reaction unit and a second precipitation unit; the wastewater detection unit transmits a detection result of the wastewater to be purified to the control unit, the control unit controls the wastewater to be purified to flow to the ion displacement unit, the electrolytic complexing breaking unit or the pH adjusting unit, and the control unit controls the reaction time of the wastewater to be purified in each unit. The invention also provides a purification method of the coke copper wastewater. According to the technical scheme provided by the invention, the composition of copper elements in the wastewater is analyzed by the wastewater detection unit, and the control unit controls the flow direction of the wastewater and the treatment time of the wastewater in each unit, so that the efficient treatment of the wastewater is realized.
Description
Technical Field
The invention belongs to the technical field of wastewater treatment, and particularly relates to an automatic purification system and a purification method for coke copper wastewater.
Background
In the fields of early chemical industry, printing and dyeing, electroplating, nonferrous smelting, mining of nonferrous metals, rinsing wastewater of electronic materials, dye production and the like, wastewater containing a large amount of copper ions is often generated and is called as pyrocopper wastewater. In the coke copper wastewater, the main pollutants are copper ions, unreacted copper simple substance and copper-containing complex. The copper content in the coke copper wastewater is very high, and direct discharge not only causes environmental pollution but also wastes resources, so that the treatment method of the coke copper wastewater becomes a hot topic in the field of wastewater treatment.
At present, the method for treating the pyrocopper wastewater mainly comprises the following steps: chemical precipitation, ion exchange, electrolysis, membrane separation; however, the chemical precipitation method has the problems that complete precipitation cannot be achieved and secondary pollution is easily caused by added chemical reagents; the ion exchange method has problems of high investment cost and difficulty in controlling the reaction progress, and the membrane exchange method has problems of incomplete purification.
Therefore, an automatic purification system and an automatic purification method for coke copper wastewater are developed to solve the technical defects of high purification cost and poor purification effect of the purification method for coke copper wastewater in the prior art, and thus the problems to be solved by the technical staff in the field are urgently needed.
Disclosure of Invention
In view of the above, the present invention provides an automatic purification system and a purification method for coke copper wastewater, which are used to solve the technical defects of high purification cost and poor purification effect of the purification method for coke copper wastewater in the prior art.
The invention provides an automatic purification system of coke copper wastewater, which comprises: the device comprises a wastewater detection unit, a control unit, a wastewater collection unit, an ion displacement unit, a first precipitation unit, an electrolytic complex breaking unit, a pH adjustment unit, a mixed reaction unit and a second precipitation unit;
the wastewater collection unit is respectively connected with the ion displacement unit, the electrolytic complex breaking unit and the pH adjusting unit, and the ion displacement unit, the first precipitation unit, the electrolytic complex breaking unit, the pH adjusting unit, the mixed reaction unit and the second precipitation unit are sequentially connected;
the waste water detection unit is arranged in the waste water collection unit, the waste water detection unit transmits a detection result of waste water to be purified to the control unit, the control unit controls the waste water to be purified to flow to the ion displacement unit, the electrolytic complex breaking unit or the pH adjusting unit, and the control unit controls the reaction time of the waste water to be purified in the ion displacement unit, the first precipitation unit, the electrolytic complex breaking unit, the pH adjusting unit, the mixed reaction unit and the second precipitation unit.
Preferably, the automatic purification system for the copper coke wastewater further comprises: a biodegradation unit;
the biodegradation unit is arranged behind the second precipitation unit, and supernatant of the second precipitation unit enters the biodegradation unit.
Preferably, the biodegradation unit comprises: a pH adjusting part and a biological oxidation part;
the wastewater to be purified flows through the pH adjusting part and the biological oxidation part in sequence.
Preferably, the number of the pH adjusting parts is more than two, and the bio-oxidation part includes: the wastewater to be purified flows through the anaerobic oxidation part, the facultative oxidation part and the contact oxidation part in sequence.
Preferably, the water outlet of the second precipitation unit and/or the biodegradation unit is connected to the waste water collection unit.
Preferably, the automatic purification system for the copper coke wastewater further comprises: and the solid-liquid separation unit is connected with the water outlet of the second precipitation unit.
The invention also provides a purification method of the coke copper wastewater, which comprises the following steps:
the wastewater detection unit detects whether the coke copper wastewater contains Cu, copper complex or Cu in the wastewater collection unit2+And transmitting the detection result to the control unit;
if the detection result contains Cu, copper complex and Cu2+The control unit controls the wastewater to be purified after ion replacement, first precipitation, electrolytic disruption and complexation, pH adjustment, alkali addition and mixing and second precipitation in sequence;
or the like, or, alternatively,
if the detection result contains copper complex and Cu2+The control unit controls the wastewater to be purified after electrolytic decomplexation, pH adjustment, alkali addition mixing and precipitation in sequence;
or the like, or, alternatively,
if the detection result only contains Cu2+The control unit controls the wastewater to be purified after pH adjustment, alkali addition and mixing and secondary precipitation in sequence;
the control unit controls the reaction time of each step.
Preferably, the purification method further comprises: and (4) biodegradation, namely after the precipitation of the purified wastewater is finished, biologically degrading supernatant obtained by precipitation and discharging.
Preferably, the purification method further comprises: and (3) performing solid-liquid separation, after the wastewater to be purified is precipitated, performing solid-liquid separation on the solid obtained by precipitation, respectively collecting separated solid and separated filtrate, and allowing the separated filtrate to flow to the wastewater collection unit.
Preferably, the biodegradation method is as follows: after the pH of the supernatant is adjusted to 7-8, sequentially carrying out anaerobic oxidation, facultative oxidation and contact oxidation, and finishing biodegradation treatment;
the anaerobic oxidation strain is an anaerobic bacterium, the facultative oxidation strain is a facultative bacterium, and the contact oxidation strain is an aerobic bacterium.
In summary, the present invention provides an automatic purification system for coke copper wastewater, which comprises: the device comprises a wastewater detection unit, a control unit, a wastewater collection unit, an ion displacement unit, a first precipitation unit, an electrolytic complex breaking unit, a pH adjustment unit, a mixed reaction unit and a second precipitation unit; the wastewater collection unit is respectively connected with the ion displacement unit, the electrolytic complex breaking unit and the pH adjusting unit, and the ion displacement unit, the first precipitation unit, the electrolytic complex breaking unit, the pH adjusting unit, the mixed reaction unit and the second precipitation unit are sequentially connected; the waste water detection unit is arranged in the waste water collection unit, the waste water detection unit transmits a detection result of waste water to be purified to the control unit, the control unit controls the waste water to be purified to flow to the ion displacement unit, the electrolytic complex breaking unit or the pH adjusting unit, and the control unit controls the reaction time of the waste water to be purified in the ion displacement unit, the first precipitation unit, the electrolytic complex breaking unit, the pH adjusting unit, the mixed reaction unit and the second precipitation unit. The invention also provides a purification method of the coke copper wastewater. According to the technical scheme provided by the invention, the composition of copper elements in the wastewater is analyzed by the wastewater detection unit, the control unit controls the flow direction of the wastewater and the treatment time of the wastewater in each unit, the high-efficiency treatment of the wastewater is realized, and the technical defects of high purification cost and poor purification effect of a purification method of the coke copper wastewater in the prior art are overcome.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic structural diagram of an automated purification system for copper coke wastewater according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a biodegradation unit in the automatic purification system for the copper coke wastewater according to the embodiment of the present invention.
Detailed Description
The automatic purification system and the purification method for the coke copper wastewater provided by the embodiment of the invention solve the technical defects of high purification cost and poor purification effect of the purification method for the coke copper wastewater in the prior art.
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In order to explain the present invention in more detail, the following describes an automatic purification system and purification method for copper coke wastewater provided by the present invention in detail with reference to the accompanying drawings.
Referring to fig. 1 and 2, an embodiment of the present invention provides an automatic purification system for coke copper wastewater, including: the device comprises a wastewater detection unit, a control unit, a wastewater collection unit, an ion displacement unit, a first precipitation unit, an electrolytic complex breaking unit, a pH adjustment unit, a mixed reaction unit and a second precipitation unit; the wastewater collection unit is respectively connected with the ion displacement unit, the electrolytic complex breaking unit and the pH adjusting unit, and the ion displacement unit, the first precipitation unit, the electrolytic complex breaking unit, the pH adjusting unit, the mixed reaction unit and the second precipitation unit are sequentially connected; the waste water detection unit is arranged inside the waste water collection unit, the waste water detection unit transmits a detection result of waste water to be purified to the control unit, the control unit controls the waste water to be purified to flow to the ion displacement unit, the electrolytic complex breaking unit or the pH adjusting unit, and the control unit controls the reaction time of the waste water to be purified in the ion displacement unit, the first precipitation unit, the electrolytic complex breaking unit, the pH adjusting unit, the mixed reaction unit and the second precipitation unit.
In the technical scheme provided by the embodiment of the invention, the wastewater detection unit arranged in the wastewater collection unit accurately analyzes the content of copper elements in the wastewater to be purified, so that the types of the copper elements are detected, such as: elemental, complexed or Cu copper2+And the relative content of each type of copper element is detected. According to the type of the copper element, the wastewater to be purified is determined to flow from the wastewater collection unit to the ion displacement unit, the electrolytic complexing breaking unit or the pH adjusting unit for connection, so that the copper elements of various types can be effectively purified, and a good purification effect is ensured.
Meanwhile, in the invention, because the purification path of the wastewater to be purified is determined by the element composition of the wastewater to be purified, the waste of chemical raw materials used for purification and the waste of time can be avoided, and the purification cost is effectively reduced.
The automatic purification system and the purification method for the coke copper wastewater provided by the embodiment of the invention solve the technical defects of high purification cost and poor purification effect of the purification method for the coke copper wastewater in the prior art.
The whole process flow and the operation of the apparatus will be briefly described below with reference to the process method.
In the first case, the wastewater 1 to be purified contains Cu, a copper complex and Cu2+At this time, the wastewater detection unit detects that the wastewater 1 to be purified contains three types of copper elements, and transmits the detection result to the control unit, and the control unit controls the wastewater to be purified to flow from the wastewater collection unit to the ion replacement unit.
In the ion replacement unit, the Cu simple substance is oxidized into Cu2+Then, the wastewater 1 to be purified flows into the first precipitation unit again; in the first precipitation unit, Cu in the wastewater 1 to be purified2+With OH-Bond formation of Cu (OH)2After precipitation, the wastewater 1 to be purified enters an electrolytic decomplexation unit.
In the electrolytic decomplexation unit, the copper complex is oxidized to Cu2+At this time, the waste liquid to be purified contains only Cu2+. As the main element to be purified in the wastewater 1 to be purified is Cu2+In the first precipitation unit, it is not possible to achieve for Cu2+Is completely purified. Therefore, to realize for Cu2+And in this case, the wastewater 1 to be purified is subjected to a secondary sedimentation treatment.
In the above-mentioned complex breaking electrolysis unit and ion replacement unit, the wastewater 1 to be purified needs an acidic environment so that the Cu in the wastewater 1 to be purified2+Can be completely precipitated, and during the actual treatment, the wastewater 1 to be purified needs to be firstly adjusted to be alkaline by a pH adjusting unit and then mixed with OH-Sufficient mixing was performed in the mixing reaction unit to ensure Cu2+Can be reacted with OH-After sufficient collision, precipitation was performed.
Further, to ensureThe precipitation is completed, the wastewater 1 to be purified enters a second precipitation unit from the mixed reaction unit, so that Cu (OH)2Fully precipitating and finishing the purification.
In the second case, the wastewater 2 to be purified contains a copper complex and Cu2+At this time, the wastewater detection unit detects that the wastewater 2 to be purified contains 2 types of copper elements, and transmits the detection result to the control unit, and the control unit controls the wastewater to be purified to directly flow from the wastewater collection unit to the decomplexation electrolysis unit.
In the purification process of the wastewater 2 to be purified, the subsequent purification treatment process is the same as the steps of the wastewater 1 to be purified, and the details are not repeated herein.
In the third case, the wastewater 3 to be purified contains only Cu2+At this time, the wastewater detection unit detects that the wastewater to be purified 3 contains 1 type of copper element, and transmits the detection result to the control unit, and the control unit controls the wastewater to be purified to flow directly from the wastewater collection unit to the pH adjustment unit.
In the purification process of the wastewater 3 to be purified, the subsequent purification treatment process is the same as the steps of the wastewater 1 to be purified, and the details are not repeated herein.
Meanwhile, in the whole purification process, according to the detection result of the wastewater to be purified transmitted to the control unit by the wastewater detection unit, the control unit controls the reaction time of each step, so that the complete purification of each purification step is ensured, the waste of the purification time can be avoided, and the purification efficiency is effectively improved.
Further optimize technical scheme, the automatic purification system of burnt copper waste water that the embodiment of the invention provides still includes: a biodegradation unit; the biodegradation unit is arranged behind the second precipitation unit, and the supernatant of the second precipitation unit enters the biodegradation unit.
In the biodegradation unit, the supernatant fluid flowing out of the second precipitation unit can further improve the purification effect of the waste water through the biodegradation purification effect. In the present invention, since the wastewater to be purified has been subjected to the aforementioned purification step, the amount of purification ions to be purified by the biodegradation unit is not so large, and therefore, the overall purification efficiency of the apparatus is not affected even by the purification step of the biodegradation unit.
In order to ensure a good purification effect of the biodegradation unit and provide a good purification environment for a biodegradation process, the embodiment of the invention provides a technical scheme that the biodegradation unit comprises: a pH adjusting part and a biological oxidation part; the wastewater to be purified flows through the pH adjusting part and the biological oxidation part in sequence.
The pH adjusting part adjusts the wastewater to be purified to the proper pH value of the biological oxidation part, thereby not only ensuring the good purification effect of the biological oxidation part, but also preventing the inactivation of the bacterial species of the biological oxidation part caused by the pH value of the wastewater to be purified.
Further, in order to ensure good pH adjusting effect of the pH adjusting parts, the number of the pH adjusting parts is more than two, and a multi-stage adjusting mode is adopted to ensure that the wastewater to be purified can be adjusted to the optimum pH value before entering the biological oxidation part. In the specific purification, the pH is about 7 to 8.
Similarly, to ensure the best purification effect of the bio-oxidation part, the bio-oxidation part comprises: the waste water to be purified flows through the anaerobic oxidation part, the facultative oxidation part and the contact oxidation part in sequence, so that the high-efficiency purification of the waste water to be purified is realized. During specific purification, the anaerobic oxidation strain is an anaerobic bacterium, the facultative oxidation strain is a facultative bacterium, and the contact oxidation strain is an aerobic bacterium.
In order to prevent incomplete purification of the wastewater to be purified, in the automatic purification system for the coke copper wastewater, the water outlet of the second precipitation unit and/or the biodegradation unit is connected with the wastewater collection unit. The waste water to be purified is purified for the second time, so that the good purification effect is further ensured.
The technical scheme is better optimized, and the automatic purification system for the coke copper wastewater provided by the embodiment of the invention further comprises: and the solid-liquid separation unit is connected with the water outlet of the second precipitation unit. The solid-liquid separation unit separates the wastewater flowing out of the second precipitation unit, and respectively collects and separates solids and separated filtrate, and the separated filtrate flows to the wastewater collection unit.
The technical scheme provided by the invention is applied to industrial production and can be obtained through practical application, and for conventional waste liquid, 900 tons of the pyrocopper waste water can be treated per day, and the treatment cost of each ton of the pyrocopper waste water is 12 yuan; the treated waste liquid meets the national standard through detection.
Compared with the prior art, the treatment efficiency of the coke copper wastewater is improved by 35 percent, and the treatment cost is reduced by 20 percent.
In summary, the present invention provides an automatic purification system for coke copper wastewater, which comprises: the device comprises a wastewater detection unit, a control unit, a wastewater collection unit, an ion displacement unit, a first precipitation unit, an electrolytic complex breaking unit, a pH adjustment unit, a mixed reaction unit and a second precipitation unit; the wastewater collection unit is respectively connected with the ion displacement unit, the electrolytic complex breaking unit and the pH adjusting unit, and the ion displacement unit, the first precipitation unit, the electrolytic complex breaking unit, the pH adjusting unit, the mixed reaction unit and the second precipitation unit are sequentially connected; the waste water detection unit is arranged in the waste water collection unit, the waste water detection unit transmits a detection result of waste water to be purified to the control unit, the control unit controls the waste water to be purified to flow to the ion displacement unit, the electrolytic complex breaking unit or the pH adjusting unit, and the control unit controls the reaction time of the waste water to be purified in the ion displacement unit, the first precipitation unit, the electrolytic complex breaking unit, the pH adjusting unit, the mixed reaction unit and the second precipitation unit. The invention also provides a purification method of the coke copper wastewater. According to the technical scheme provided by the invention, the composition of copper elements in the wastewater is analyzed by the wastewater detection unit, the control unit controls the flow direction of the wastewater and the treatment time of the wastewater in each unit, the high-efficiency treatment of the wastewater is realized, and the technical defects of high purification cost and poor purification effect of a purification method of the coke copper wastewater in the prior art are overcome.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (3)
1. An automatic purification system of burnt copper waste water, its characterized in that, automatic purification system of burnt copper waste water includes: the device comprises a wastewater detection unit, a control unit, a wastewater collection unit, an ion displacement unit, a first precipitation unit, an electrolytic complex breaking unit, a pH adjustment unit, a mixed reaction unit and a second precipitation unit;
the wastewater collection unit is respectively connected with the ion displacement unit, the electrolytic complex breaking unit and the pH adjusting unit, and the ion displacement unit, the first precipitation unit, the electrolytic complex breaking unit, the pH adjusting unit, the mixed reaction unit and the second precipitation unit are sequentially connected;
the wastewater detection unit is arranged in the wastewater collection unit and transmits a detection result of wastewater to be purified to the control unit, the control unit controls the wastewater to be purified to flow to the ion displacement unit, the electrolytic breaking and complexing unit or the pH adjusting unit, and the control unit controls the reaction time of the wastewater to be purified in the ion displacement unit, the first precipitation unit, the electrolytic breaking and complexing unit, the pH adjusting unit, the mixed reaction unit and the second precipitation unit;
the automatic clean system of burnt copper waste water still includes: a biodegradation unit;
the biodegradation unit is arranged behind the second precipitation unit, and supernatant of the second precipitation unit enters the biodegradation unit;
the biodegradation unit comprises: a pH adjusting part and a biological oxidation part;
the wastewater to be purified flows through the pH adjusting part and the biological oxidation part in sequence;
the number of the pH adjusting parts is more than two, and the biological oxidation part comprises: the wastewater to be purified flows through the anaerobic oxidation part, the facultative oxidation part and the contact oxidation part in sequence;
and the water outlet of the biodegradation unit is connected with the wastewater collection unit.
2. The automated purification system of coke waste water as claimed in claim 1, further comprising: and the solid-liquid separation unit is connected with the water outlet of the second precipitation unit.
3. A purification method of the coke copper wastewater is characterized by comprising the following steps:
the wastewater detection unit detects whether the coke copper wastewater contains Cu, copper complex or Cu in the wastewater collection unit2+And transmitting the detection result to the control unit;
if the detection result contains Cu, copper complex and Cu2+The control unit controls the wastewater to be purified after ion replacement, first precipitation, electrolytic disruption and complexation, pH adjustment, alkali addition and mixing and second precipitation in sequence;
or the like, or, alternatively,
if the detection result contains copper complex and Cu2+The control unit controls the wastewater to be purified after electrolytic decomplexation, pH adjustment, alkali addition mixing and precipitation in sequence;
or the like, or, alternatively,
if the detection result only contains Cu2+The control unit controls the wastewater to be purified after pH adjustment, alkali addition and mixing and secondary precipitation in sequence;
the control unit controls the reaction time of each step;
the purification method further comprises: biodegradation, namely after the precipitation of the purified wastewater is finished, discharging supernatant obtained by precipitation after biodegradation;
the purification method further comprises: solid-liquid separation, after the wastewater to be purified is precipitated, carrying out solid-liquid separation on the solid obtained by precipitation, respectively collecting separated solid and separated filtrate, and enabling the separated filtrate to flow to the wastewater collection unit;
the biodegradation method comprises the following steps: adjusting the pH of the supernatant more than twice, and after adjusting the pH of the supernatant to 7-8, sequentially carrying out anaerobic oxidation, facultative oxidation and contact oxidation, and finishing biodegradation treatment;
the anaerobic oxidation strain is an anaerobic bacterium, the facultative oxidation strain is a facultative bacterium, and the contact oxidation strain is an aerobic bacterium.
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