CN210367243U - Copper mine ore dressing wastewater treatment recycling device - Google Patents
Copper mine ore dressing wastewater treatment recycling device Download PDFInfo
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- CN210367243U CN210367243U CN201920897583.0U CN201920897583U CN210367243U CN 210367243 U CN210367243 U CN 210367243U CN 201920897583 U CN201920897583 U CN 201920897583U CN 210367243 U CN210367243 U CN 210367243U
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Abstract
The utility model provides a copper ore dressing waste water treatment retrieval and utilization device mainly uses a large amount of high pH, high rigidity, the high suspended solid that flotation agent such as lime, butyl xanthate, No. 2 oil produced to copper ore dressing production in a large number, contains a large amount of Ca2+The problem that the pipeline is blocked by long-term direct clarification and recycling of the ionic copper ore dressing wastewater; firstly, adding carbon dioxide, reacting with water to generate carbonate and hydrogen ions, and reacting with calcium ions and hydroxyl ions in the copper ore dressing wastewater respectively to generate calcium carbonate and water, so as to directly reduce the pH value and the hardness; secondly, adding a flocculating agentThe coagulant aid helps to reduce the pH, hardness and suspended matters in the copper ore dressing wastewater; finally, carrying out sedimentation and sludge concentration through an inclined tube sedimentation tank, so that the effluent index meets the requirement of reuse water: the pH value is 7-8, the hardness is less than or equal to 100mg/L, the suspended matter is less than or equal to 30mg/L, and the turbidity is less than or equal to 40NTU, so that the problem of pipe blockage of wastewater is solved, and the purposes of water saving and emission reduction are achieved.
Description
Technical Field
The utility model relates to a copper mine ore dressing waste water treatment retrieval and utilization device belongs to industrial wastewater treatment technical field.
Background
The copper metal is widely applied to the fields of electricity, light industry, machinery, construction, national defense industry and the like, plays an important role in the national economic system, and has the consumption second to aluminum in the non-ferrous metal materials in China. Copper is second only to silver in conductivity and is therefore most widely used in the power and telecommunications industries.
In general, a large amount of flotation reagents such as lime, butyl xanthate, No. 2 oil and the like are required to be added in the copper ore dressing production process, so that the produced copper ore dressing wastewater has high pH, a large amount of suspended matters and high hardness and contains a large amount of Ca2+The method has the characteristics that the direct discharge can cause serious pollution to soil and water source environment, if the direct discharge is only subjected to simple clarification treatment and recycling, the indexes of copper ore dressing can be influenced, and a large amount of calcium sulfate scale generated in the long-term operation process can also seriously block a process pipeline and influence the normal production of the copper ore dressing.
The traditional copper ore dressing wastewater treatment and reuse method mainly comprises the following steps: the method of adjusting pH by sulfuric acid → coagulating sedimentation → recycling the effluent has high hardness of the recycled water, and the recycled water is easy to block a pipeline and difficult to clean after being recycled for a long time; further methods are: the method of sodium carbonate decalcification → coagulating sedimentation → pH adjustment by sulfuric acid → effluent recycling, however, the hardness is reduced by using sodium carbonate, the operation cost is too high, and the method is difficult to bear for manufacturers. The invention patent with the prior patent application number of 200910043609.6 discloses a method for treating and recycling mineral processing wastewater of complex copper-lead-zinc polymetallic ores in high-altitude areas, and provides' coagulating sedimentation → ClO2Oxidation → aeration → pH adjustment → precipitation, the effluent is reused for production, but the technical scheme thereof cannot achieve effective calcium removal effect and also does not solve the problem of pipe blockage caused by high-hardness reuse water.
Disclosure of Invention
The utility model aims at providing a copper ore dressing waste water treatment retrieval and utilization device to the above-mentioned problem that current copper ore dressing waste water treatment method exists, comprehensive consideration reduces pH, suspended solid and Ca2+And recycling the ions for copper ore flotation production. According to the water quality characteristics of high pH, suspended matters and high hardness of the copper ore dressing wastewater, LCO is added2The (liquid carbon dioxide), the coagulant and the coagulant aid are subjected to cavitation, coagulation, flocculation and precipitation to achieve the purposes of removing calcium, reducing pH and reducing COD, suspended matters and turbidity, and the effluent is recycled in the copper ore beneficiation production process, so that the utilization rate is effectively improved and the cost is saved.
The technical solution of the utility model is as follows: the copper ore dressing wastewater treatment and recycling device structurally comprises a pipeline mixer, a first reaction tank, a second reaction tank, a flocculation tank, a sedimentation tank, a self-cleaning filter, a cavitation reactor, a coagulant adding device, a coagulant aid adding device, a liquid carbon dioxide adding device, a copper ore dressing wastewater tank, a recycling water tank, a carbon dioxide cavitation water tank, a source water pump, a recycling water pump, a gas-liquid mixing pump, a sludge reflux pump, a sludge discharge pump and a filtering water pump; the water inlet of the copper ore dressing wastewater tank is connected with copper ore dressing wastewater, the water outlet of the copper ore dressing wastewater tank is connected with the water inlet of a pipeline mixer through a source water pump, the water outlet of the pipeline mixer is connected with the water inlet of a first reaction tank, the chemical outlet of a coagulant adding device is connected with the chemical inlet of the first reaction tank, the water outlet of the first reaction tank is connected with the water inlet of a second reaction tank, the chemical outlet of a coagulant adding device is connected with the chemical inlet of the second reaction tank, the water outlet of the second reaction tank is connected with the water inlet of a flocculation tank, the water outlet of the flocculation tank is connected with the water inlet of a sedimentation tank, the sludge outlet of the sedimentation tank is connected with the sludge return port of the first reaction tank through a sludge return pump, and the sludge outlet of the sedimentation tank simultaneously sends sludge to a tailing thickening tank through a sludge; the water outlet of the sedimentation tank is connected with the water inlet of the reuse water tank, and the first water outlet of the reuse water tank sends out reuse water through a reuse water pump; the second water outlet of the recycling water tank is connected with the water inlet of the self-cleaning filter through a filtering water pump, the water outlet of the self-cleaning filter is connected with the water inlet of the carbon dioxide cavitation water tank, the water outlet of the carbon dioxide cavitation water tank and the medicine outlet of the liquid carbon dioxide feeding device are connected with the liquid inlet of the cavitation reactor through a gas-liquid mixing pump, and the liquid outlet of the cavitation reactor is connected with the medicine inlet of the pipeline mixer.
The utility model has the advantages that: adding carbon dioxide, reacting with water to generate carbonate and hydrogen ions, and reacting with calcium ions and hydroxyl ions in the copper ore dressing wastewater respectively to generate calcium carbonate and water, so as to directly reduce the pH value and the hardness; secondly, adding a flocculating agent and a coagulant aid to assist in reducing the pH, hardness and suspended matters in the copper ore dressing wastewater; finally, carrying out sedimentation and sludge concentration through an inclined tube sedimentation tank, so that the effluent index meets the requirement of reuse water: the pH value is 7-8, the hardness is less than or equal to 100mg/L, the suspended matter is less than or equal to 30mg/L, and the turbidity is less than or equal to 40 NTU; solves the problem of pipe blockage caused by waste water, and achieves the purposes of water saving and emission reduction.
Drawings
FIG. 1 is a schematic diagram of the overall structure of a copper ore dressing wastewater treatment and reuse device.
FIG. 2 is a flow chart of the copper ore dressing wastewater treatment and reuse process.
In the figure, CuTWW represents copper ore dressing wastewater, RCW represents reuse water, SC represents sludge, and T represents1Representing copper ore dressing waste water tank and T2Indicating reuse water tank, T3Tank for indicating cavitation of carbon dioxide, D1Means for adding coagulant, D2Indicating coagulant aid adding device, D3Indicating liquid carbon dioxide feeding device, PM indicating pipeline mixer and RT1Denotes the first reaction cell, RT2Showing a second reaction tank, FT showing a flocculation tank, ST showing a sedimentation tank, AF showing a self-cleaning filter, CR showing a cavitation reactor, P1Source water pump, P2Water pump and P for indicating reuse3Showing a gas-liquid mixing pump, P4Showing sludge reflux pump, P5Indicating a dredge pump, P6A filtration water pump is shown.
Detailed Description
The copper ore dressing wastewater treatment and recycling device shown in figure 1 structurally comprises a pipeline mixer PM and a first reaction tank RT1And a second reaction tank RT2Flocculation tank FT, sedimentation tank ST, self-cleaning filter AF, cavitation reactor CR and coagulant adding device D1Coagulant aid adding device D2Liquid carbon dioxide adding device D3Copper ore dressing waste water tank T1Reuse water tank T2Carbon dioxide cavitation water tank T3And source water pump P1And recyclingWater pump P2Gas-liquid mixing pump P3Sludge reflux pump P4A sludge pump P5And a filter water pump P6(ii) a Wherein copper ore dressing wastewater CuTWW is connected into copper ore dressing wastewater tank T1Water inlet of (1), copper ore dressing waste water tank T1Water outlet of the water pump P1A water inlet of the pipeline mixer PM is connected, and a water outlet of the pipeline mixer PM is connected with the first reaction tank RT1Water inlet, coagulant adding device D1The drug outlet is connected with a first reaction tank RT1The first reaction tank RT1The water outlet is connected with a second reaction tank RT2Water inlet and coagulant aid adding device D2The drug outlet is connected with a second reaction tank RT2A second reaction tank RT2The water outlet of the flocculation tank FT is connected with the water inlet of the sedimentation tank ST, and the sludge outlet of the sedimentation tank ST passes through the sludge reflux pump P4Connecting the first reaction tank RT1The sludge return port of the sedimentation tank ST and the sludge outlet of the sedimentation tank ST are also connected through a sludge discharge pump P5Sending out the sludge SC (to a tailing thickening tank); the water outlet of the sedimentation tank ST is connected with a recycling water tank T2Water inlet of (1), recycling water tank T2The first water outlet passes through a reuse water pump P2Sending out recycle water RCW; recycling water tank T2The second water outlet passes through a filter water pump P6A water inlet connected with the self-cleaning filter AF, and a water outlet connected with the carbon dioxide cavitation water tank T3Water inlet of (2), carbon dioxide cavitation water tank T3Water outlet and liquid carbon dioxide feeding device D3The medicine outlet passes through a gas-liquid mixing pump P3The liquid inlet of the cavitation reactor CR is connected, and the liquid outlet of the cavitation reactor CR is connected with the medicine inlet of the pipeline mixer PM.
Main flow: copper ore dressing wastewater CuTWW sequentially passes through copper ore dressing wastewater box T1Source water pump P1PM of pipeline mixer and RT of first reaction tank1And a second reaction tank RT2A flocculation tank FT, a sedimentation tank ST and a recycling water tank T2Recycling water pump P2Adding carbon dioxide into PM of a pipeline mixer, and placing the carbon dioxide in a first reaction tank RT1Adding and mixingCoagulant in the second reaction tank RT2And adding a coagulant aid, performing cavitation oxidation decomposition on the copper ore beneficiation wastewater, removing calcium by carbon dioxide, reducing pH, coagulating, flocculating and precipitating, and finally sending out recycled water RCW, so that the pH value of the copper ore beneficiation wastewater is reduced to 7-8 from 10-12.5, the hardness is reduced to less than 100mg/L from 250 mg/L-2000 mg/L, the suspended matters are reduced to less than 30mg/L from 70 mg/L-200 mg/L, and the turbidity is reduced to less than 40NTU from 50 NTU-150 NTU, thereby solving the problem of pipe blockage of the wastewater.
A carbon dioxide cavitation adding process: recycling water tank T2Part of the reuse water in the water tank passes through a filter water pump P in turn6Self-cleaning filter AF and carbon dioxide cavitation water tank T3Gas-liquid mixing pump P3Firstly, finely filtering part of recycled water by using a self-cleaning filter AF with the filtering precision of 25-50 mu m, then adding liquid carbon dioxide to the front of a gas-liquid mixing pump, dissolving by using the gas-liquid mixing pump, carrying out cavitation reaction by using a cavitation reactor, finally adding the liquid carbon dioxide to a pipeline mixer, and fully reacting with calcium hydroxide in copper ore beneficiation wastewater to generate calcium carbonate, so that the effects of simultaneously removing calcium and reducing pH are achieved, the concentration of calcium ions is less than 40mg/L, and the pH is 7-8; meanwhile, strong oxidant generated by cavitation reaction is used for oxidizing organic pollutants in the wastewater, and the COD value is reduced to be less than 60 mg/L.
Aiming at the characteristics of high pH and high calcium of copper ore dressing wastewater, the most ideal method for removing calcium and reducing pH is to utilize the addition of LCO2(liquid carbon dioxide), with H2O (water) reaction to produce CO3 2-(carbonate ion) and H+(hydrogen ion) with OH in Water-(hydroxide ion) and Ca2+(calcium ion) reaction to form CaCO3(calcium carbonate) and H2O (water). Realize the simultaneous precipitation and Ca removal2+(calcium ions), lower pH, and lower TDS (total dissolved solids). The conventional calcium removal method utilizes the addition of Na2CO3(sodium carbonate) with Ca2+(calcium ion) reaction to form CaCO3(calcium carbonate) precipitation, since sodium carbonate is more expensive than liquid carbon dioxide and 2 Na' s+(sodium ion) to 1 Ca2+The (calcium ion) is heavier, so the operation cost is high, and more sulfuric acid is added when the pH value is reduced due to the increase of TDS and the pH value of water.
The main chemical reaction equation is as follows:
CO2+ H2O = CO3 2-+ 2H+(1)
CO3 2-+ Ca2+= CaCO3↓ (2)
H++ OH-= H2O (3)
CO2+ Ca(OH)2= CaCO3↓ + H2O (4)
Na2CO3+ Ca(OH)2= CaCO3↓ + 2NaOH (5)
aiming at the characteristic that copper ore beneficiation wastewater contains more organic beneficiation reagents and has high COD, organic pollutants are oxidized by utilizing cavitation to degrade the COD. Hydrodynamic cavitation refers to that water flow rapidly passes through a flow limiting area to generate pressure drop, so that local pressure is smaller than saturated steam pressure at corresponding temperature, and instant collapse of bubbles is generated, thus local high temperature and high pressure are generated in a very small cavitation range, hydroxyl bonds in water are broken, and radicals such as H (hydrogen radical), OH (hydroxyl radical) and the like are formed, thereby achieving the purpose of reducing organic pollutants.
The copper ore dressing wastewater treatment and reuse method comprises the following steps: 1) mixing carbon dioxide for reaction; 2) carrying out coagulation reaction; 3) flocculation reaction; 4) the flocculation tank stays; 5) precipitating in an inclined tube, and recycling outlet water; 6) and (4) carrying out cavitation addition on carbon dioxide.
The method comprises the following steps of 1) carrying out carbon dioxide mixing reaction, adding carbon dioxide, reacting with water to generate carbonate and hydrogen ions, reacting with calcium ions and hydroxyl ions in the copper ore beneficiation wastewater respectively to generate calcium carbonate and water, reducing the pH value of the copper ore beneficiation wastewater from 10-12.5 to 7-8, and reducing the hardness from 250-2000 mg/L to less than 100 mg/L.
And 2) carrying out coagulation reaction by adding a flocculating agent through the coagulation reaction, wherein the coagulation reaction time is 1-5 minutes.
And 3) performing flocculation reaction by adding a coagulant aid for 1-5 minutes.
And 4) allowing the wastewater to pass through a flocculation tank for 5-15 minutes to generate large flocs so as to facilitate subsequent precipitation.
And 5) precipitating through an inclined tube, precipitating in the inclined tube precipitation tank by using flocs generated in the flocculation tank and calcium carbonate particles, wherein the surface load of the precipitation zone is 8-14 m3/m2H, returning the returned sludge with the wastewater flow of 5-10% to a coagulation reaction tank by using a sludge return pump so as to save the addition of a coagulant and a flocculant, and discharging residual sludge by using a sludge discharge pump when the sludge concentration reaches 5-10%; thereby utilize the pipe chute sedimentation tank to deposit and sludge concentration for the play water reaches the index of reuse water: the pH value is 7-8, the hardness is less than or equal to 100mg/L, the suspended matter is less than or equal to 30mg/L, and the turbidity is less than or equal to 40 NTU.
The step 6) is carried out by carbon dioxide cavitation adding, wherein firstly, self-cleaning filters with the filtering precision of 25-50 mu m are used for finely filtering part of the recycled water, liquid carbon dioxide is added in front of a gas-liquid mixing pump, dissolved by the gas-liquid mixing pump, subjected to cavitation reaction by a cavitation reactor, added into a pipeline mixer, and fully reacted with calcium hydroxide in copper ore dressing wastewater to generate calcium carbonate, so that the effects of simultaneously removing calcium and reducing pH are achieved, the concentration value of calcium ions is reduced to be less than or equal to 40mg/L, and the pH is 7-8; meanwhile, strong oxidant generated by cavitation reaction is used for oxidizing organic pollutants in the wastewater, and the COD value is reduced to be less than or equal to 60 mg/L.
Examples
The technical solution of the present invention is further explained below according to the embodiment.
The production and treatment capacity of a copper ore dressing plant of a certain copper industry Co., Ltd is 7000 tons/day, and the produced copper ore dressing wastewater is treated and reused for the ore dressing process. The project primary design data is as follows:
1. design water quality and quantity
Designing the water treatment amount of the copper ore beneficiation wastewater: 20000T/D (833T/H).
The copper ore dressing wastewater treatment and reuse process adopts a softening and clarifying treatment technology, so that various indexes of the treated dressing wastewater meet the emission standard of copper, cobalt and nickel industrial pollutants (GB 25467-2010), and meanwhile, the treated wastewater reaches higher reuse indexes and is returned to production for use, thereby ensuring the normal operation of copper ore dressing production. The water quality indexes of inlet water and outlet water are designed as follows:
2. copper ore dressing wastewater treatment and reuse process flow
The process flow for treating and recycling the copper ore beneficiation wastewater is shown in figure 2. Considering that a large amount of flotation agents are used in the copper ore dressing production process, mainly comprising lime, butyl xanthate and No. 2 oil, the copper ore dressing wastewater has high pH, suspended matters and hardness and contains a large amount of Ca2+The ions, which are directly clarified and recycled for a long time, can block the pipeline. Comprehensive consideration of reducing pH, suspended matters and Ca in treatment and reuse of copper ore beneficiation wastewater2+And recycling the ions for copper ore flotation production. According to the water quality characteristics of high pH, suspended matters and high hardness of the copper ore beneficiation wastewater, adding CO is utilized2With water (H)2O) reaction to produce CO3 2-And H+In the same manner as Ca in water2+And OH-Reaction to produce CaCO3And H2And O, directly reducing the pH and the hardness, simultaneously reducing partial TDS of the wastewater, adding a flocculating agent (PFS) and a coagulant aid (PAM) to assist in reducing the pH, the hardness and the suspended matters in the copper ore dressing wastewater, and performing precipitation and sludge concentration through a high-efficiency reaction sedimentation tank, so that the index of the reuse water reaches pH 7-8, the hardness is less than or equal to 100mg/L, the suspended matters are less than or equal to 30mg/L, and the turbidity is less than or equal to 40 NTU. Simultaneously, two sets of high-precision self-cleaning filters are arranged to filter part of water, and a cavitation reactor is arranged for CO2The addition is carried out by cavitation.
3. Main design parameters of copper ore dressing wastewater treatment and reuse system
(1) Civil engineering:
note: the equipment set up in the waste water treatment plant includes: reaction tank, flocculation tank, sedimentation tank, dosing device and CO2A cavitation water tank, a reuse water tank and the like, and a power distribution and control room.
(2) And (4) main equipment.
Claims (1)
1. The copper ore dressing wastewater treatment and recycling device is characterized by comprising a pipeline mixer, a first reaction tank, a second reaction tank, a flocculation tank, a sedimentation tank, a self-cleaning filter, a cavitation reactor, a coagulant adding device, a coagulant aid adding device, a liquid carbon dioxide adding device, a copper ore dressing wastewater tank, a recycling water tank, a carbon dioxide cavitation water tank, a source water pump, a recycling water pump, a gas-liquid mixing pump, a sludge reflux pump, a sludge discharge pump and a filtering water pump;
the water inlet of the copper ore dressing wastewater tank is connected with copper ore dressing wastewater, the water outlet of the copper ore dressing wastewater tank is connected with the water inlet of a pipeline mixer through a source water pump, the water outlet of the pipeline mixer is connected with the water inlet of a first reaction tank, the chemical outlet of a coagulant adding device is connected with the chemical inlet of the first reaction tank, the water outlet of the first reaction tank is connected with the water inlet of a second reaction tank, the chemical outlet of a coagulant adding device is connected with the chemical inlet of the second reaction tank, the water outlet of the second reaction tank is connected with the water inlet of a flocculation tank, the water outlet of the flocculation tank is connected with the water inlet of a sedimentation tank, the sludge outlet of the sedimentation tank is connected with the sludge return port of the first reaction tank through a sludge return pump, and the sludge outlet of the sedimentation tank simultaneously sends sludge to a tailing thickening tank through a sludge;
the water outlet of the sedimentation tank is connected with the water inlet of the reuse water tank, and the first water outlet of the reuse water tank sends out reuse water through a reuse water pump; the second water outlet of the recycling water tank is connected with the water inlet of the self-cleaning filter through a filtering water pump, the water outlet of the self-cleaning filter is connected with the water inlet of the carbon dioxide cavitation water tank, the water outlet of the carbon dioxide cavitation water tank and the medicine outlet of the liquid carbon dioxide feeding device are connected with the liquid inlet of the cavitation reactor through a gas-liquid mixing pump, and the liquid outlet of the cavitation reactor is connected with the medicine inlet of the pipeline mixer.
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| CN201920897583.0U CN210367243U (en) | 2019-06-14 | 2019-06-14 | Copper mine ore dressing wastewater treatment recycling device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110272147A (en) * | 2019-06-14 | 2019-09-24 | 江苏卓博环保科技有限公司 | Copper ore dressing wastewater treatment and renovation device and method |
| CN113185037A (en) * | 2021-06-08 | 2021-07-30 | 金川集团股份有限公司 | System and method for removing calcium in non-ferrous metal smelting wastewater |
| CN114804442A (en) * | 2022-05-27 | 2022-07-29 | 路德环境科技股份有限公司 | Alkali residue effluent disposal system |
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2019
- 2019-06-14 CN CN201920897583.0U patent/CN210367243U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110272147A (en) * | 2019-06-14 | 2019-09-24 | 江苏卓博环保科技有限公司 | Copper ore dressing wastewater treatment and renovation device and method |
| CN113185037A (en) * | 2021-06-08 | 2021-07-30 | 金川集团股份有限公司 | System and method for removing calcium in non-ferrous metal smelting wastewater |
| CN114804442A (en) * | 2022-05-27 | 2022-07-29 | 路德环境科技股份有限公司 | Alkali residue effluent disposal system |
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