CN110577308A - Method for eliminating wastewater discoloration in beneficiation wastewater treatment process - Google Patents

Method for eliminating wastewater discoloration in beneficiation wastewater treatment process Download PDF

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Publication number
CN110577308A
CN110577308A CN201910796198.1A CN201910796198A CN110577308A CN 110577308 A CN110577308 A CN 110577308A CN 201910796198 A CN201910796198 A CN 201910796198A CN 110577308 A CN110577308 A CN 110577308A
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wastewater
discoloration
eliminating
treatment
beneficiation
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Inventor
龙冰
陈克锋
邹勤
谢加文
陈玉林
吕清纯
段瑶
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SHIZHUYUAN NONFERROUS METAL HUNAN LLC
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SHIZHUYUAN NONFERROUS METAL HUNAN LLC
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Priority to CN201910796198.1A priority Critical patent/CN110577308A/en
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    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F11/00Treatment of sludge; Devices therefor
    • C02F11/12Treatment of sludge; Devices therefor by de-watering, drying or thickening
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/52Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/5236Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using inorganic agents
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/52Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
    • C02F1/54Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
    • C02F1/56Macromolecular compounds
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/66Treatment of water, waste water, or sewage by neutralisation; pH adjustment
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F1/72Treatment of water, waste water, or sewage by oxidation
    • C02F1/76Treatment of water, waste water, or sewage by oxidation with halogens or compounds of halogens
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00Treatment of water, waste water, or sewage
    • C02F2001/007Processes including a sedimentation step
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/10Nature of the water, waste water, sewage or sludge to be treated from quarries or from mining activities
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00Controlling or monitoring parameters in water treatment
    • C02F2209/06Controlling or monitoring parameters in water treatment pH
    • CCHEMISTRY; METALLURGY
    • C02TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02FTREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2209/00Controlling or monitoring parameters in water treatment
    • C02F2209/11Turbidity

Abstract

The invention discloses a method for eliminating wastewater discoloration in the beneficiation wastewater treatment process, which comprises the following steps: s1, adding sulfuric acid into the beneficiation wastewater to adjust the pH value of the wastewater to 7.5, and stirring for reaction; s2, adding 450mg/L sodium chlorate serving as wastewater, and stirring for reaction; s3, adding 15mg/L PAC (polyaluminium chloride) of wastewater dosage, and stirring for reaction; s4, finally adding 2mg/L PAM (polyacrylamide) used as wastewater, stirring for reaction, and standing for precipitation; s5, performing the next operation after the precipitated effluent is colorless and transparent; s6, detecting and analyzing, discharging after being qualified, the invention has scientific and reasonable structure, safe and convenient use, pH value adjustment, operation of adding sulfuric acid to the front end to change the color of water, and then adding sodium chlorate to carry out COD oxidative degradation, thereby preventing the color development of the treated effluent due to the reaction of the sulfuric acid and other chemical substances in the water, and leading the effluent finally passing through the wastewater treatment system to be colorless and transparent.

Description

Method for eliminating wastewater discoloration in beneficiation wastewater treatment process
Technical Field
the invention relates to the technical field of wastewater treatment, in particular to a method for eliminating wastewater discoloration in the beneficiation wastewater treatment process.
background
the wastewater treatment is to treat wastewater by physical, chemical and biological methods, purify the wastewater and reduce pollution so as to achieve the purposes of wastewater recovery and reuse and make full use of water resources, the main process of mineral separation is molybdenum-bismuth-sulfur full flotation-black-white-tungsten mixed flotation-fluorite flotation, and the used mineral separation reagents comprise ethidium-nitrogen, kerosene, water glass, benzohydroxamic acid, oleic acid and the like, and the prior technical scheme is as follows: the total tailings are naturally precipitated in a tailing pond by adding lime, clarified beneficiation wastewater enters a special wastewater treatment station for advanced treatment, and finally reaches the standard and is discharged, wherein the COD (chemical oxygen demand) of the wastewater is 110-180 mg/L, pH, and the value of the wastewater is 10.0-12.0;
The current wastewater treatment process comprises the following steps: when the COD146mg/L, pH value of the wastewater is 11.86, firstly adding 450mg/L sodium chlorate with the wastewater dosage, stirring and reacting for 5min, then adding 2mg/L PAM with the wastewater dosage, stirring and reacting for 3min, standing and settling for 1h, adding 280mg/L sulfuric acid with the wastewater dosage to the supernatant after clarification to adjust the pH value to 7.5, and adding sulfuric acid to ensure that the COD65mg/L, pH value of the treated wastewater is 7.5, wherein the color of the wastewater is deepened after adding sulfuric acid and is changed from colorless transparency to light yellow,
However, the color of the ore dressing wastewater turns yellow after the pH value is adjusted to be neutral by adding sulfuric acid in the back end operation, the effluent chroma is increased, the effluent index is influenced, and the phenomenon is caused because the sulfuric acid reacts with other chemical substances in the water, so that the treated effluent is colored.
Disclosure of Invention
The invention provides a method for eliminating wastewater discoloration in the beneficiation wastewater treatment process, which can effectively solve the problem that the flotation wastewater color turns yellow after the pH value is adjusted to be neutral by adding sulfuric acid at the back end, the effluent chroma is increased, the effluent index is influenced, and the phenomenon is caused because the sulfuric acid reacts with other chemical substances in water, so that the treated effluent is colored in the background technology.
In order to achieve the purpose, the invention provides the following technical scheme: a method for eliminating wastewater discoloration in the beneficiation wastewater treatment process comprises the following steps:
s1, adding sulfuric acid into the beneficiation wastewater to adjust the pH value of the wastewater to 7.5, and stirring for reaction;
S2, adding 450mg/L sodium chlorate serving as wastewater, and stirring for reaction;
S3, adding 15mg/L PAC (polyaluminium chloride) of wastewater dosage, and stirring for reaction;
s4, finally adding 2mg/L PAM (polyacrylamide) used as wastewater, stirring for reaction, and standing for precipitation;
s5, performing the next operation after the precipitated effluent is colorless and transparent;
and S6, carrying out detection and analysis, and discharging after the product is qualified.
according to the technical scheme, the content of the sulfuric acid used in the wastewater in the step S1 is 250-300 mg/L.
according to the technical scheme, the stirring time in the step S1 is 2-4 min;
the stirring time in the step S2 is 4-6 min;
The stirring time in the step S3 is 4-6 min;
and the stirring time in the step S4 is 2-4 min.
according to the technical scheme, the step S4 is kept stand and precipitated for 0.8-1.5 h.
according to the technical scheme, the steps S2-S4 are all carried out in a reaction tank, and the step S5 is carried out in a precipitation tank.
according to the technical scheme, the rotating speed in the steps S1-S4 is 10-15 rpm/min.
According to the technical scheme, the detection and analysis in the step S6 comprises PH measurement and turbidity measurement;
sampling different positions of the sedimentation tank for three times through a PH determinator, and summing and dividing the PH values obtained by the three times by the times to obtain an average value;
The turbidity assay comprises the steps of:
1) Firstly, visually observing whether the water quality has no color and then has no floating objects in a static state after solid-liquid separation in a sedimentation tank;
2) Then, the different positioners of the sedimentation tank are sampled three times by a turbidimeter, and the measured values obtained in the three times are summed and divided by the times to obtain an average value.
according to the technical scheme, the turbidimeter is manually calibrated before being used in the step 2.
According to the technical scheme, the precipitate in the step S5 is dried by a dryer, and the drying moisture is lower than 1.5%.
According to the technical scheme, the discharged sewage is subjected to sampling detection in the step S6, and the detection rate is 0.5-1L/M3
compared with the prior art, the invention has the beneficial effects that: the invention has scientific and reasonable structure and safe and convenient use, adjusts the PH value, adds the sulfuric acid to the foremost operation to change the color of the water, then adds the sodium chlorate to carry out COD oxidative degradation, prevents the color development of the treated effluent water due to the reaction of the sulfuric acid and other chemical substances in the water, leads the effluent water finally passing through the wastewater treatment system to be colorless and transparent, reduces the pollution, ensures the accuracy of measured data by obtaining an average value through multiple detections, prevents the detection error from causing the pollution, and can reasonably store and treat the precipitate in the sedimentation tank through drying treatment, thereby being convenient and safe.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention.
In the drawings:
FIG. 1 is a schematic flow chart of the steps of the present invention;
FIG. 2 is a schematic view of the turbidity measuring process according to the present invention.
Detailed Description
The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are described herein for the purpose of illustration and explanation and not limitation.
example 1: as shown in figures 1-2, the invention provides a technical scheme, a method for eliminating wastewater discoloration in a beneficiation wastewater treatment process, which comprises the following steps:
s1, adding sulfuric acid into the beneficiation wastewater to adjust the pH value of the wastewater to 7.5, and stirring for reaction;
s2, adding 450mg/L sodium chlorate serving as wastewater, and stirring for reaction;
s3, adding 15mg/L PAC (polyaluminium chloride) of wastewater dosage, and stirring for reaction;
S4, finally adding 2mg/L PAM (polyacrylamide) used as wastewater, stirring for reaction, and standing for precipitation;
S5, performing the next operation after the precipitated effluent is colorless and transparent;
And S6, carrying out detection and analysis, and discharging after the product is qualified.
According to the technical scheme, the content of the sulfuric acid used in the wastewater in the step S1 is 280 mg/L.
According to the technical scheme, the stirring time in the step S1 is 3 min;
In the step S2, the stirring time is 5 min;
In the step S3, the stirring time is 5 min;
The stirring time in step S4 was 3 min.
according to the technical scheme, standing and precipitating for 1h in the step S4.
According to the technical scheme, the steps S2-S4 are all carried out in the reaction tank, and the step S5 is carried out in the sedimentation tank.
according to the technical scheme, the rotating speed in the steps S1-S4 is 13 rpm/min.
according to the technical scheme, the detection and analysis in the step S6 comprises PH measurement and turbidity measurement;
The PH measurement is to sample different positions of the sedimentation tank for three times through a PH measurer, and sum and divide the PH values obtained by the three times by the times to obtain an average value;
the turbidity assay comprises the following steps:
1) firstly, visually observing whether the water quality has no color and then has no floating objects in a static state after solid-liquid separation in a sedimentation tank;
2) then, the different positioners of the sedimentation tank are sampled three times by a turbidimeter, and the measured values obtained in the three times are summed and divided by the times to obtain an average value.
According to the technical scheme, the turbidimeter is manually calibrated before being used in the step 2.
according to the technical scheme, the precipitate in the step S5 is dried by a dryer, and the drying moisture is lower than 1.5%.
according to the technical scheme, the discharged sewage is subjected to sampling detection in the step S6, and the detection rate is 0.7L/M3
Example 2: as shown in figures 1-2, the invention provides a technical scheme, a method for eliminating wastewater discoloration in a beneficiation wastewater treatment process, which comprises the following steps:
s1, adding sulfuric acid into the beneficiation wastewater to adjust the pH value of the wastewater to 7.5, and stirring for reaction;
s2, adding 450mg/L sodium chlorate serving as wastewater, and stirring for reaction;
S3, adding 15mg/L PAC (polyaluminium chloride) of wastewater dosage, and stirring for reaction;
S4, finally adding 2mg/L PAM (polyacrylamide) used as wastewater, stirring for reaction, and standing for precipitation;
s5, performing the next operation after the precipitated effluent is colorless and transparent;
and S6, carrying out detection and analysis, and discharging after the product is qualified.
According to the technical scheme, the content of the sulfuric acid used in the wastewater in the step S1 is 250-300 mg/L.
according to the technical scheme, the stirring time in the step S1 is 2 min;
in the step S2, the stirring time is 4 min;
in the step S3, the stirring time is 4 min;
The stirring time in step S4 was 2 min.
According to the technical scheme, standing and precipitating for 0.8h in the step S4.
according to the technical scheme, the steps S2-S4 are all carried out in the reaction tank, and the step S5 is carried out in the sedimentation tank.
According to the technical scheme, the rotating speed in the steps S1-S4 is 15 rpm/min.
According to the technical scheme, the detection and analysis in the step S6 comprises PH measurement and turbidity measurement;
The PH measurement is to sample different positions of the sedimentation tank for three times through a PH measurer, and sum and divide the PH values obtained by the three times by the times to obtain an average value;
The turbidity assay comprises the following steps:
1) firstly, visually observing whether the water quality has no color and then has no floating objects in a static state after solid-liquid separation in a sedimentation tank;
2) then, the different positioners of the sedimentation tank are sampled three times by a turbidimeter, and the measured values obtained in the three times are summed and divided by the times to obtain an average value.
According to the technical scheme, the turbidimeter is manually calibrated before being used in the step 2.
according to the technical scheme, the precipitate in the step S5 is dried by a dryer, and the drying moisture is lower than 1.5%.
according to the technical scheme, the discharged sewage is subjected to sampling detection in the step S6, and the detection rate is 0.5L/M3
Example 3: as shown in figures 1-2, the invention provides a technical scheme, a method for eliminating wastewater discoloration in a beneficiation wastewater treatment process, which comprises the following steps:
S1, adding sulfuric acid into the beneficiation wastewater to adjust the pH value of the wastewater to 7.5, and stirring for reaction;
S2, adding 450mg/L sodium chlorate serving as wastewater, and stirring for reaction;
s3, adding 15mg/L PAC (polyaluminium chloride) of wastewater dosage, and stirring for reaction;
s4, finally adding 2mg/L PAM (polyacrylamide) used as wastewater, stirring for reaction, and standing for precipitation;
s5, performing the next operation after the precipitated effluent is colorless and transparent;
and S6, carrying out detection and analysis, and discharging after the product is qualified.
According to the technical scheme, the content of the sulfuric acid used in the wastewater in the step S1 is 300 mg/L.
according to the technical scheme, the stirring time in the step S1 is 4 min;
In the step S2, the stirring time is 6 min;
In the step S3, the stirring time is 6 min;
The stirring time in step S4 was 4 min.
According to the technical scheme, standing and precipitating for 1.5h in the step S4.
according to the technical scheme, the steps S2-S4 are all carried out in the reaction tank, and the step S5 is carried out in the sedimentation tank.
according to the technical scheme, the rotating speed in the steps S1-S4 is 10 rpm/min.
according to the technical scheme, the detection and analysis in the step S6 comprises PH measurement and turbidity measurement;
the PH measurement is to sample different positions of the sedimentation tank for three times through a PH measurer, and sum and divide the PH values obtained by the three times by the times to obtain an average value;
The turbidity assay comprises the following steps:
1) Firstly, visually observing whether the water quality has no color and then has no floating objects in a static state after solid-liquid separation in a sedimentation tank;
2) then, the different positioners of the sedimentation tank are sampled three times by a turbidimeter, and the measured values obtained in the three times are summed and divided by the times to obtain an average value.
according to the technical scheme, the turbidimeter is manually calibrated before being used in the step 2.
according to the technical scheme, the precipitate in the step S5 is dried by a dryer, and the drying moisture is lower than 1.5%.
according to the technical scheme, the discharged sewage is subjected to sampling detection in the step S6, and the detection rate is 1L/M3
the following tables are prepared by examples 1-3:
Through measurement, the standard of composite greening is achieved, the PH is qualified, but in use, the rotating speed is reduced, the time is prolonged, visible matters are generated, the precipitation time needs to be prolonged, and the embodiment 1 is comprehensively known to be suitable for popularization and use.
Compared with the prior art, the invention has the beneficial effects that: the invention has scientific and reasonable structure and safe and convenient use, adjusts the PH value, adds the sulfuric acid to the foremost operation to change the color of the water, then adds the sodium chlorate to carry out COD oxidative degradation, prevents the color development of the treated effluent water due to the reaction of the sulfuric acid and other chemical substances in the water, leads the effluent water finally passing through the wastewater treatment system to be colorless and transparent, reduces the pollution, ensures the accuracy of measured data by obtaining an average value through multiple detections, prevents the detection error from causing the pollution, and can reasonably store and treat the precipitate in the sedimentation tank through drying treatment, thereby being convenient and safe.
finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. a method for eliminating wastewater discoloration in the beneficiation wastewater treatment process is characterized in that: the method comprises the following steps:
S1, adding sulfuric acid into the beneficiation wastewater to adjust the pH value of the wastewater to 7.5, and stirring for reaction;
s2, adding 450mg/L sodium chlorate serving as wastewater, and stirring for reaction;
s3, adding 15mg/L PAC (polyaluminium chloride) of wastewater dosage, and stirring for reaction;
S4, finally adding 2mg/L PAM (polyacrylamide) used as wastewater, stirring for reaction, and standing for precipitation;
S5, performing the next operation after the precipitated effluent is colorless and transparent;
And S6, carrying out detection and analysis, and discharging after the product is qualified.
2. the method for eliminating the discoloration of wastewater during the treatment of beneficiation wastewater according to claim 1, wherein the amount of the wastewater used in the step S1 is 250-300mg/L sulfuric acid.
3. the method for eliminating the discoloration of wastewater during the treatment of beneficiation wastewater according to claim 1, wherein the stirring time in the step S1 is 2-4 min;
the stirring time in the step S2 is 4-6 min;
The stirring time in the step S3 is 4-6 min;
and the stirring time in the step S4 is 2-4 min.
4. the method for eliminating the discoloration of wastewater during the treatment of beneficiation wastewater according to claim 1, wherein the standing and precipitation in the step S4 is 0.8-1.5 h.
5. The method for eliminating the discoloration of wastewater generated during the treatment of beneficiation wastewater according to claim 1, wherein the steps S2-S4 are performed in a reaction tank, and the step S5 is performed in a sedimentation tank.
6. the method for eliminating the discoloration of wastewater during the treatment of beneficiation wastewater according to claim 1, wherein the rotation speed in the steps S1-S4 is 10-15 rpm/min.
7. The method for eliminating the discoloration of wastewater during the treatment of beneficiation wastewater according to claim 1, wherein the detection analysis in the step S6 comprises pH measurement and turbidity measurement;
Sampling different positions of the sedimentation tank for three times through a PH determinator, and summing and dividing the PH values obtained by the three times by the times to obtain an average value;
the turbidity assay comprises the steps of:
1) Firstly, visually observing whether the water quality has no color and then has no floating objects in a static state after solid-liquid separation in a sedimentation tank;
2) Then, the different positioners of the sedimentation tank are sampled three times by a turbidimeter, and the measured values obtained in the three times are summed and divided by the times to obtain an average value.
8. the method for eliminating wastewater discoloration in beneficiation wastewater treatment process according to claim 7, wherein the turbidity meter in step 2 is manually calibrated before use.
9. The method for eliminating the discoloration of wastewater generated during the treatment of beneficiation wastewater according to claim 7, wherein the precipitate obtained in the step S5 is dried by a dryer, and the drying moisture is less than 1.5%.
10. The method for eliminating wastewater discoloration in beneficiation wastewater treatment process according to claim 1, wherein the discharged wastewater is sampled and detected in step S6, and the detection rate is 0.5-1L/M3
CN201910796198.1A 2019-08-27 2019-08-27 Method for eliminating wastewater discoloration in beneficiation wastewater treatment process Pending CN110577308A (en)

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