CN113213662A - Lead-zinc beneficiation wastewater flotation organic reagent rapid separation pretreatment device and use method thereof - Google Patents
Lead-zinc beneficiation wastewater flotation organic reagent rapid separation pretreatment device and use method thereof Download PDFInfo
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- CN113213662A CN113213662A CN202110553743.1A CN202110553743A CN113213662A CN 113213662 A CN113213662 A CN 113213662A CN 202110553743 A CN202110553743 A CN 202110553743A CN 113213662 A CN113213662 A CN 113213662A
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- 238000000926 separation method Methods 0.000 title claims abstract description 69
- 239000002351 wastewater Substances 0.000 title claims abstract description 69
- 238000005188 flotation Methods 0.000 title claims abstract description 37
- JQJCSZOEVBFDKO-UHFFFAOYSA-N lead zinc Chemical compound [Zn].[Pb] JQJCSZOEVBFDKO-UHFFFAOYSA-N 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims abstract description 23
- 239000003153 chemical reaction reagent Substances 0.000 title claims abstract description 15
- 238000002156 mixing Methods 0.000 claims abstract description 51
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 33
- 238000006243 chemical reaction Methods 0.000 claims abstract description 29
- 239000003814 drug Substances 0.000 claims abstract description 15
- 239000000701 coagulant Substances 0.000 claims abstract description 14
- 238000007790 scraping Methods 0.000 claims abstract description 5
- 239000002893 slag Substances 0.000 claims abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 73
- 239000003795 chemical substances by application Substances 0.000 claims description 19
- 238000005192 partition Methods 0.000 claims description 10
- 239000007788 liquid Substances 0.000 claims description 3
- 238000007781 pre-processing Methods 0.000 claims description 2
- 235000011149 sulphuric acid Nutrition 0.000 claims description 2
- 239000001117 sulphuric acid Substances 0.000 claims description 2
- 230000000007 visual effect Effects 0.000 abstract description 4
- 230000000694 effects Effects 0.000 description 10
- 239000003921 oil Substances 0.000 description 7
- 238000004064 recycling Methods 0.000 description 4
- 239000011701 zinc Substances 0.000 description 4
- 239000007789 gas Substances 0.000 description 3
- 239000007800 oxidant agent Substances 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 229920002401 polyacrylamide Polymers 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 238000004065 wastewater treatment Methods 0.000 description 3
- 229910052725 zinc Inorganic materials 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 238000005345 coagulation Methods 0.000 description 2
- 230000015271 coagulation Effects 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- ZOOODBUHSVUZEM-UHFFFAOYSA-N ethoxymethanedithioic acid Chemical compound CCOC(S)=S ZOOODBUHSVUZEM-UHFFFAOYSA-N 0.000 description 2
- 239000008394 flocculating agent Substances 0.000 description 2
- 238000005189 flocculation Methods 0.000 description 2
- 230000016615 flocculation Effects 0.000 description 2
- 229910001385 heavy metal Inorganic materials 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 229910052745 lead Inorganic materials 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000012991 xanthate Substances 0.000 description 2
- 229910001656 zinc mineral Inorganic materials 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 239000012190 activator Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000002738 chelating agent Substances 0.000 description 1
- 230000001112 coagulating effect Effects 0.000 description 1
- 230000000536 complexating effect Effects 0.000 description 1
- 239000008139 complexing agent Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000008396 flotation agent Substances 0.000 description 1
- 239000004088 foaming agent Substances 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
- 239000003112 inhibitor Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
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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
-
- 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
- C02F1/24—Treatment of water, waste water, or sewage by flotation
-
- 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
- C02F1/40—Devices for separating or removing fatty or oily substances or similar floating material
-
- 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
- C02F1/5281—Installations for water purification using chemical agents
-
- 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
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
- C02F1/56—Macromolecular compounds
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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
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
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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
- C02F2101/30—Organic compounds
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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
- C02F2103/10—Nature of the water, waste water, sewage or sludge to be treated from quarries or from mining activities
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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)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The invention discloses a lead-zinc beneficiation wastewater flotation organic reagent rapid separation pretreatment device and a use method thereof, belongs to the field of mine beneficiation engineering, and solves the problem of low separation efficiency of the organic reagent of the current lead-zinc beneficiation wastewater. The device comprises a first mixing pool, a first diversion chamber, a pre-separation pool, a second mixing pool, a second diversion chamber and a reaction pool which are connected in sequence, wherein a first stirrer, a wastewater inlet pipe and a sulfuric acid adding pipe are arranged in the first mixing pool, a second stirrer is arranged in the second mixing pool, and a third stirrer is arranged in the reaction pool. The using method comprises the following steps: adding lead-zinc beneficiation wastewater and a sulfuric acid solution into a first mixing tank, mixing, then entering a first flow guide chamber, a pre-separation tank and a second mixing tank, adding a coagulant aid solution, mixing, then entering a second flow guide chamber and a reaction tank, and carrying out slag scraping and separation after reaction. The invention adds the sulfuric acid at the front end and the coagulant aid at the rear end, so that the floating condition of the organic medicament and the thickness of an oil film are more visual, and the efficiency of air floatation separation is improved.
Description
Technical Field
The invention belongs to the field of mine beneficiation engineering, and particularly relates to a lead-zinc beneficiation wastewater flotation organic reagent rapid separation pretreatment device and a use method thereof.
Background
In the process of non-ferrous metal lead-zinc ore dressing, flotation reagents are often required to be added, such as:pH regulators, collectors, foaming agents, activators, inhibitors, etc., which are mostly organic or heavy metal complexing or chelating agents. In order to save water resources and improve the recycling rate of water, the beneficiation wastewater needs to be returned to the beneficiation process for recycling, but the direct recycling can generate great influence on beneficiation indexes. Especially in the lead sorting process, the xanthate has strong collecting capacity on zinc minerals, and Cu2+、Pb2+The ions can also activate zinc minerals, and residual xanthate and Cu are remained when the wastewater is recycled2+、Pb2+The quality of the lead concentrate is seriously influenced, and the zinc content in the lead concentrate is overhigh. Therefore, the recycling of the beneficiation wastewater after treatment can greatly improve the beneficiation indexes, wherein the removal of high COD caused by a flotation reagent is one of the main tasks for treating the lead-zinc beneficiation wastewater.
At present, domestic lead-zinc beneficiation wastewater is not subjected to flotation reagent separation generally, and directly enters a rear-end oxidation process, and is oxidized by an oxidant so as to achieve the aim of reducing COD (chemical oxygen demand), and the treatment cost is higher; the air flotation process is adopted, but the air flotation agents are added together, and only flocculation and coagulation aids such as PAC (polyaluminium chloride), PAM (polyacrylamide) and the like are used, the addition amount and the air flotation effect of the agents need to be determined through long-term exploration and experiments, the air flotation effect is general, and the efficiency is low.
Disclosure of Invention
The invention aims to provide a device for quickly separating and pretreating lead-zinc beneficiation wastewater flotation organic agents, and aims to solve the problems that the separation efficiency of the organic agents in the lead-zinc beneficiation wastewater is low, the agent addition effect is not visual, and the agent addition amount is not easy to control at present.
The invention also aims to provide a use method of the flotation organic reagent rapid separation pretreatment device for lead-zinc beneficiation wastewater.
The technical scheme of the invention is as follows: the utility model provides a lead zinc ore dressing waste water flotation organic medicament rapid segregation preprocessing device, is equipped with first agitator, waste water inlet tube and sulphuric acid in the first mixed pond, is equipped with the second agitator in the second mixed pond, is equipped with the third agitator in the reaction tank including consecutive first mixed pond, first water conservancy diversion room, pre-separation pond, second mixed pond, second water conservancy diversion room and reaction tank.
As a further improvement of the invention, a coagulant aid adding pipe is arranged in the second mixing tank.
As a further improvement of the invention, the first mixing tank is communicated with the first diversion chamber through a first overflow weir; the pre-separation pool is communicated with the second mixing pool through a second overflow weir; the second mixing pool is communicated with the second diversion chamber through a third overflow weir.
As a further improvement of the invention, a partition wall between the first diversion chamber and the pre-separation chamber and a partition wall between the second diversion chamber and the reaction tank are respectively provided with a high-level water through hole and a low-level water through hole, the high-level water through hole is positioned at a position which is one third away from the top of the reaction tank, and the low-level water through hole is positioned at the lower end of the partition wall.
As a further improvement of the invention, the water passing area ratio of the high-level water passing hole to the low-level water passing hole between the first diversion chamber and the pre-separation chamber is 2: 3; the ratio of the water passing area of the high-level water passing hole to the low-level water passing hole between the second diversion chamber and the reaction tank is 2:3
As a further improvement of the invention, the pre-separation pool adopts a rotary gallery.
As a further improvement of the invention, the bottom of the pre-separation pool is connected with a vent pipe, and a vent valve is arranged on the vent pipe.
A use method of a flotation organic reagent fast separation pretreatment device for lead-zinc beneficiation wastewater comprises the following steps:
A. lead-zinc beneficiation wastewater enters a first mixing tank through a water inlet pipe, and a prepared sulfuric acid solution is added into the first mixing tank through an adding pipe;
B. after being stirred and mixed by a first stirrer in a first mixing tank, lead-zinc beneficiation wastewater and sulfuric acid overflow into a first diversion chamber through a first overflow weir;
C. the wastewater is rectified by a high-level water passing hole and a low-level water passing hole in the first diversion chamber, further mixed and then enters a pre-separation pool;
D. after the liquid enters the pre-separation tank, the flow velocity is reduced, and the demulsified flotation organic agent quickly floats upwards to form an oil film;
E. after the wastewater flows through the pre-separation tank for preliminary separation, the wastewater overflows through a second overflow weir and enters a second mixing tank, and the prepared coagulant aid solution is added into the second mixing tank through an adding pipe;
F. in the second mixing tank, the wastewater and the coagulant aid are stirred and mixed by a third stirrer and then overflow into a second diversion chamber through a third overflow weir;
G. the wastewater in the second diversion chamber is rectified by the high-level water passing hole and the low-level water passing hole, and then enters the reaction tank after being further mixed;
H. the wastewater added with the medicament is slowly mixed in the reaction tank through a third stirrer, and flows into a rear-end pressurized gas dissolving system for slag scraping and separation after full reaction.
The invention aims to pre-treat lead-zinc beneficiation wastewater in order to improve the efficiency of removing beneficiation organic chemicals. As lead-zinc beneficiation wastewater is mostly alkaline, most organic matters of the flotation reagent are hydrocarbons and oils, the pH value is adjusted by utilizing sulfuric acid, the demulsification effect is very obvious, and the flotation reagent has high sensitivity to the pH. The invention utilizes the characteristic to separate a medicament adding system of the air floatation reaction tank, adds the sulfuric acid at the front end and adds the flocculating agent and the coagulant aid at the rear end, so that the floating condition of the organic medicament and the thickness of an oil film are more visual, a basis is provided for the air supply amount and the medicament addition of the subsequent pressurized dissolved air floatation process, and the air floatation separation efficiency is improved.
The invention has the beneficial effects that:
1. the invention has the characteristics of mature process, simple operation and convenient assembly and construction;
2. the invention forms a set of device for effectively separating the flotation organic agent, thereby saving energy and power consumption;
3. the beneficiation wastewater pretreated by the device has obvious floating of organic medicament, more visual medicament adding effect, and then enters the subsequent air flotation pressurizing and air dissolving process, so that the efficiency of the air flotation process is greatly improved;
4. the beneficiation wastewater pretreated by the device and the method has the advantages that the removal rate of the organic agents is greatly improved, and in enterprises with tailing ponds, the separation agents can enter the tailing ponds in advance and are naturally degraded by sunlight, so that the consumption of oxidizing agents in a subsequent oxidation process can be greatly reduced, and the wastewater treatment cost is reduced.
Drawings
FIG. 1 is a floor plan of the present invention;
FIG. 2 is a view A-A of FIG. 1;
FIG. 3 is a view B-B of FIG. 1;
FIG. 4 is a schematic structural view of a high level water hole in an embodiment of the present invention;
FIG. 5 is a schematic view of the lower water through hole according to the embodiment of the present invention.
In the figure: 1-a first mixing tank; 2-a first diversion chamber; 3-a pre-separation pool; 4-a second mixing tank; 5-a second diversion chamber; 6-a reaction tank; 7-a first stirrer; 8-a second stirrer; 9-sulfuric acid addition pipe; 10-a wastewater inlet pipe; 11-a first weir; 12-a third weir; 13-high water through hole; 14-low water through hole; 15-a second weir; 16-a third stirrer; 17-a blow-down pipe; 18-a blow-down valve; 19-coagulant aid addition tube.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings.
Examples 1,
As shown in fig. 1-3, a device for quickly separating and pretreating lead-zinc beneficiation wastewater flotation organic chemicals comprises a first mixing tank 1, a first diversion chamber 2, a pre-separation tank 3, a second mixing tank 4, a second diversion chamber 5 and a reaction tank 6 which are connected in sequence, wherein a first stirrer 7, a wastewater inlet pipe 10 and a sulfuric acid adding pipe 9 are arranged in the first mixing tank 1, a second stirrer 8 is arranged in the second mixing tank 4, and a third stirrer 16 is arranged in the reaction tank 6.
A coagulant aid adding pipe 19 is arranged in the second mixing tank 4.
The first mixing pool 1 is communicated with the first diversion chamber 2 through a first overflow weir 11; the pre-separation pool 3 is communicated with the second mixing pool 4 through a second overflow weir 15; the second mixing tank 4 is communicated with the second diversion chamber 5 through a third overflow weir 12.
A high water through hole 13 and a low water through hole 14 are respectively arranged on the partition wall between the first diversion chamber 2 and the pre-separation chamber 3 and the partition wall between the second diversion chamber 2 and the reaction tank 6, the high water through hole 13 is positioned at one third of the top of the tank, and the low water through hole 14 is positioned at the lower end of the partition wall.
The ratio of the water passing area of the high-level water passing hole 13 and the low-level water passing hole 14 between the first diversion chamber 2 and the pre-separation chamber 3 is 2: 3; the ratio of the water passing area of the high water passing hole 13 and the low water passing hole 14 between the second diversion chamber 2 and the reaction tank 6 is 2:3
The pre-separation pool 3 adopts a rotary gallery.
The bottom of the pre-separation tank 3 is connected with an emptying pipe 17, and the emptying pipe 17 is provided with an emptying valve 18. The emptying pipe 17 is used for emptying water in the tank during shutdown maintenance.
A use method of a flotation organic reagent fast separation pretreatment device for lead-zinc beneficiation wastewater comprises the following steps:
A. lead-zinc beneficiation wastewater enters a first mixing tank 1 through a water inlet pipe 10, and a prepared sulfuric acid solution is added into the first mixing tank 1 through an adding pipe 9;
B. after being rapidly stirred and mixed by a first stirrer 7 in a first mixing tank 1, lead-zinc beneficiation wastewater and sulfuric acid overflow into a first diversion chamber 2 through a first overflow weir 11;
C. the wastewater is rectified by a high-level water through hole 13 and a low-level water through hole 14 in the first diversion chamber 2, and then enters the pre-separation tank 3 after being further mixed;
D. after the liquid enters the pre-separation tank 3, the flow velocity is reduced, and the demulsified flotation organic agent quickly floats upwards to form an oil film;
E. after the wastewater flows through the pre-separation tank 3 for preliminary separation, the wastewater overflows into the second mixing tank 4 through the second overflow weir 15, and the prepared coagulant aid solution is added into the second mixing tank 4 through the adding pipe 19;
F. in the second mixing tank 4, the wastewater and the coagulant aid are quickly stirred and mixed by a third stirrer 8, and then overflow into a second diversion chamber 5 through a third overflow weir 12;
G. the wastewater in the second diversion chamber 5 is rectified by the high-level water through hole 13 and the low-level water through hole 14, and then enters the reaction tank 6 after being further mixed;
H. the wastewater added with the medicament is slowly mixed in the reaction tank 6 through a third stirrer 16, fully reacted and then flows into a rear-end pressurized gas dissolving system for slag scraping and separation.
The following describes the implementation of the apparatus of the present invention in further detail, specifically as follows:
1. a mineral processing wastewater treatment station of a certain large-scale lead-zinc separation plant in China has a design scale of 8000m3And d. Main pollutants: 385mg/L of COD, 12.07 of pH, 2.63mg/L of Pb, 0.58mg/L of Zn, 0.96mg/L of petroleum and 60mg/L of SS. According to the overproof water quality of the mineral processing wastewater, COD, pH value, Pb, SS and the like, the wastewater treatment process of the item selects a treatment process of 'pH value adjustment + air flotation + coagulating sedimentation + oxidation + activated carbon filtration'.
2. The pH value of the lead-zinc beneficiation wastewater is high, and the pH is firstly adjusted to 9.5-10.0. The pre-dosing system of the present invention is performed at this stage, adjusting the pH value with sulfuric acid, which is added in the first mixing tank 1. Therefore, hydroxide precipitation is formed between Pb and Zn, and preparation is made for removing Pb and Zn heavy metal ions in the subsequent process.
3. In the embodiment, the wastewater inlet pipe 10 extends into the 50cm position of the bottom of the first mixing tank 1; the sulfuric acid adding pipe 9 extends into the pool and is arranged at the position 15cm below the impeller of the stirrer of the first stirrer 7. The wastewater was stirred and mixed in the first mixing tank 1 for 2 minutes, and the size of the first mixing tank 1 was 1.85X 4.2 m. The specification of the wastewater inlet pipe 10 is DN300, and the specification of the sulfuric acid adding pipe 9 is DN 32. The first mixing tank 1 adopts overflow weir type outflow.
4. After the water discharged from the first mixing pool 1 overflows into the first diversion chamber 2, the water discharged from the high-low hole orifice flows into the pre-separation pool 3. The water passing area of the low-level water passing hole 14 is designed according to the flow rate of 60%, and the water passing area of the high-level water passing hole 13 is designed according to the flow rate of 40%. The low-level water passing holes 14 and the high-level water passing holes 13 are made of 5cm stainless steel square pipes to form outlet holes, the number of the low-level water passing holes 14 is 39, the low-level water passing holes are distributed in 3 rows, and each row comprises 13 water passing holes, as shown in FIG. 5; the high-level water through holes 13 are 26 in total and are arranged in 2 rows, and each row comprises 13 water through holes, as shown in figure 4. The small hole effluent ensures that the wastewater is stably effluent, and the mixed reaction effect is further improved.
5. After wastewater is guided by the first guide chamber 2 and enters the pre-separation tank 3, the water passing section is increased, the flow velocity is reduced, and the demulsified flotation organic agent quickly floats upwards to form an oil film. Pre-separation pool 3 miningThe rotary gallery is used to increase the separation effect, and the outflow of the pre-separation pool 3 is discharged from the upper part in an overflow mode. The pre-separation pool 3 can be used as an adjusting pool, and the volume of the pre-separation pool 3 is 220m3The hydraulic retention time is 40min, and the oil film thickness is stable.
6. According to the separation effect of the organic medicament, the thickness and the stability of the oil film, air-float flocculation and coagulation aids such as PAM are added into the second mixing chamber 4, stirred and mixed, and then overflow into the second diversion chamber 5 through the third overflow weir 12.
7. The upper water through hole 13 and the lower water through hole 14 on the partition wall between the second diversion chamber 5 and the reaction tank 6 are arranged in the same manner.
8. After entering the reaction tank 6, the wastewater is slowly mixed by the third stirrer 16 and then flows into the pressurized gas dissolving system for slag scraping and separation.
The invention utilizes the main factors influencing the separation effect of the lead-zinc beneficiation flotation reagent: PH value, demulsifier, flocculating agent, coagulant aid etc. design novel pond type, adopt the medicament to separately throw the mode of throwing, be convenient for observe the medicament and throw the effect, the dosage of better control medicament. In addition, a general concentrating mill is provided with a tailing pond, and high-COD wastewater containing a flotation organic agent and separated in advance by air flotation can be directly sent into the tailing pond and naturally degraded by sunlight, so that the consumption of an oxidant can be greatly reduced, and the treatment cost is reduced.
Claims (8)
1. The utility model provides a lead zinc ore dressing waste water flotation organic medicament rapid separation preprocessing device which characterized in that: including consecutive first mixed pond (1), first water conservancy diversion room (2), pre-separation pond (3), second mixed pond (4), second water conservancy diversion room (5) and reaction tank (6), be equipped with first agitator (7), waste water inlet tube (10) and sulphuric acid in the first mixed pond (1) and add pipe (9), be equipped with second agitator (8) in the second mixed pond (4), be equipped with third agitator (16) in reaction tank (6).
2. The lead-zinc beneficiation wastewater flotation organic agent rapid separation pretreatment device according to claim 1, characterized in that: and a coagulant aid adding pipe (19) is arranged in the second mixing tank (4).
3. The lead-zinc beneficiation wastewater flotation organic agent rapid separation pretreatment device according to claim 1 or 2, characterized in that: the first mixing pool (1) is communicated with the first diversion chamber (2) through a first overflow weir (11); the pre-separation pool (3) is communicated with the second mixing pool (4) through a second overflow weir (15); the second mixing pool (4) is communicated with the second diversion chamber (5) through a third overflow weir (12).
4. The lead-zinc beneficiation wastewater flotation organic agent rapid separation pretreatment device according to claim 3, characterized in that: a high-position water through hole (13) and a low-position water through hole (14) are respectively arranged on a partition wall between the first diversion chamber (2) and the pre-separation chamber (3) and a partition wall between the second diversion chamber (2) and the reaction tank (6), the high-position water through hole (13) is positioned at a position one third away from the top of the tank, and the low-position water through hole (14) is positioned at the lower end of the partition wall.
5. The lead-zinc beneficiation wastewater flotation organic agent rapid separation pretreatment device according to claim 4, characterized in that: the water passing area ratio of a high-level water passing hole (13) to a low-level water passing hole (14) between the first diversion chamber (2) and the pre-separation chamber (3) is 2: 3; the water passing area ratio of the high-level water passing hole (13) to the low-level water passing hole (14) between the second diversion chamber (2) and the reaction tank (6) is 2: 3.
6. The lead-zinc beneficiation wastewater flotation organic agent rapid separation pretreatment device according to claim 5, characterized in that: the pre-separation pool (3) adopts a rotary gallery.
7. The lead-zinc beneficiation wastewater flotation organic agent rapid separation pretreatment device according to claim 6, characterized in that: the bottom of the pre-separation pool (3) is connected with a vent pipe (17), and a vent valve (18) is arranged on the vent pipe (17).
8. The application method of the device for the flotation organic reagent fast separation pretreatment of the lead-zinc beneficiation wastewater is characterized by comprising the following steps:
A. lead-zinc beneficiation wastewater enters a first mixing tank (1) through a water inlet pipe (10), and a prepared sulfuric acid solution is added into the first mixing tank (1) through an adding pipe (9);
B. lead-zinc beneficiation wastewater and sulfuric acid are stirred and mixed by a first stirrer (7) in a first mixing tank (1), and then overflow into a first diversion chamber (2) through a first overflow weir (11);
C. wastewater is rectified in the first diversion chamber (2) through a high-level water through hole (13) and a low-level water through hole (14), and the wastewater enters the pre-separation pool (3) after being further mixed;
D. after the liquid enters the pre-separation pool (3), the flow velocity is reduced, and the demulsified flotation organic agent quickly floats upwards to form an oil film;
E. after the wastewater flows through the pre-separation tank (3) for preliminary separation, the wastewater overflows into a second mixing tank (4) through a second overflow weir (15), and the prepared coagulant aid solution is added into the second mixing tank (4) through an adding pipe (19);
F. in the second mixing pool (4), the wastewater and the coagulant aid are stirred and mixed by a third stirrer (8) and then overflow into a second diversion chamber (5) through a third overflow weir (12);
G. wastewater in the second diversion chamber (5) is rectified by the high-level water through holes (13) and the low-level water through holes (14), and then enters the reaction tank (6) after being further mixed;
H. the wastewater added with the medicament is slowly mixed in the reaction tank (6) through a third stirrer (16), fully reacted and then flows into a rear-end pressurized gas dissolving system for slag scraping and separation.
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| CN114308402A (en) * | 2022-01-14 | 2022-04-12 | 湖南新田岭钨业有限公司 | Flocculation sedimentation process for flotation tungsten ore tailings |
| CN117843187A (en) * | 2024-01-26 | 2024-04-09 | 中国电建集团北京勘测设计研究院有限公司 | Full-automatic mechanical repair wastewater treatment device and method for hydraulic and hydroelectric engineering |
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