CN104909490A - Phosphating and chemical nickel-plating mixed comprehensive wastewater treatment process and automated device - Google Patents
Phosphating and chemical nickel-plating mixed comprehensive wastewater treatment process and automated device Download PDFInfo
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- CN104909490A CN104909490A CN201510255363.4A CN201510255363A CN104909490A CN 104909490 A CN104909490 A CN 104909490A CN 201510255363 A CN201510255363 A CN 201510255363A CN 104909490 A CN104909490 A CN 104909490A
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Abstract
The invention provides a phosphating and chemical nickel-plating mixed comprehensive wastewater treatment process and an automated device. According to the process, high-concentration wastewater and low-concentration washing wastewater are respectively collected; the high-concentration wastewater and the low-concentration washing wastewater are mixed in a wastewater adjustment tank; the mixture sequentially enters a primary reaction tank, an inclined tube sedimentation tank, a secondary reaction tank, a floatation system, and a pH value correction tank; obtained clear water can reach a discharge standard and can be discharged; sludge produced during the wastewater treatment process enters a sludge collection tank, and is subjected to pressure filtration through a filter press; and an obtained solid matter is separately collected and disposed. The automated device comprises a PLC control system, a wastewater collection system, an adjustment tank, a primary reaction tank, an inclined tube sedimentation tank, a secondary reaction tank, a flotation system, dosing devices and an air stirring system. The phosphating and chemical nickel-plating mixed comprehensive wastewater is subjected to multiple levels of treatments. The entire process is automatically controlled by PLC. The entire wastewater treatment process is displayed dynamically. According to the invention, the process is simple, dosing amount is low, the quality standard of treated water is high, and processing efficiency is high.
Description
Technical field
The present invention relates to a kind of phosphatization and chemical nickel plating mixing comprehensive effluent disposal technology and automatic equipment, belong to industrial waste water treatment.
Background technology
Along with industrial expansion, various trade effluent gets more and more, and not only waste water resource, also seriously pollutes environment, therefore needs to process these trade effluents, makes it meet emission standard.Containing a large amount of heavy metal ion, suspended solid, petroleum hydrocarbons, the higher COD such as phosphoric acid salt, zinc-manganese in phosphorized waste water, and containing a large amount of heavy metal nickel ion, hypophosphite, phosphite etc. in chemical nickle-plating wastewater, two kinds of waste water mix in rear waste water just containing pollutents such as heavy metal, phosphoric acid salt such as a large amount of nickel zinc-manganese.
At present, phosphorized waste water generally adopts the phosphate radical in liming or soluble ferric iron salt or aluminium salt and waste water to carry out chemical reaction and forms chemical precipitation thus reach the object except dephosphorization, and heavy metal generally adopts and adds alkali such as sodium hydroxide, calcium hydroxide and regulate waste water ph, heavy metal ion is made to form precipitation of hydroxide thus the heavy metals such as removing nickel zinc-manganese.In actual production, the high-concentration waste liquid of the general existing periodic exhaustion of plating line is as oil removing, pickling, table tune, phosphatization, chemical nickel plating tank liquor, there is again the lower concentration Cleaning Wastewater of a large amount of continuous blow-down, current treatment process is all concentrate reprocessing by after the mixing of this two classes waste water, chemical agent for removing various different objectionable impurities drops in waste water together and reacts, the treatment effect of this method is not good, not comprehensively thoroughly, consumption of chemical agent is large, and processing efficiency is also lower in purification.
Summary of the invention
For existing phosphatization and chemical nickle-plating wastewater treatment process exist purification not comprehensively thoroughly, consumption of chemical agent is large, processing efficiency is lower problem, the invention provides a kind of phosphatization and chemical nickel plating mixing comprehensive effluent disposal technology and automatic equipment.
The technical solution adopted in the present invention is as follows.
A kind of phosphatization and chemical nickel plating mixing comprehensive effluent disposal technology, concrete steps are:
First high-concentration waste liquid and lower concentration Cleaning Wastewater are collected respectively, the high-concentration waste liquid then making quantitatively instillation in wastewater equalization pond and the equal quantification treatment of lower concentration Cleaning Wastewater homogeneous entered continuously;
Then the waste water that homogeneous all quantizes enters first order reaction pond through pH regulator, adds liming, calcium chloride, flocculation agent PAC, coagulant aids PAM, after mechanical stirring and chemical reaction, and OH
-mn in ion and Phosphating Solution
2+, Ni
2+, Zn
2+deng metal ion and PO
4 3-with Ca
2+formed chemical reaction and generate solids suspension matter;
In tube settling groove, carry out solid-liquid separation first, heavy metal ion and phosphorus are removed, the mud out of solid-liquid separation first enters mud collecting tank, and liquid enters second order reaction pond; Second order reaction pond comprises coagulation tank and line mixer, adds coagulating agent PAC and coagulant aids PAM in second order reaction pond, makes the molecule, oily substance etc. being difficult to precipitate flocculate into larger particles;
Waste water enters air-flotation system after the process of second order reaction pond, the slag scraper of oil pollutant in air-flotation system of the suspended matter and emulsification that are suspended in wastewater surface scrapes off and enters mud collecting tank, the waste water that tube settling groove is come obtains secondary-cleaned, clear liquid after secondary-cleaned enters in pH value readjustment pond, adjusts back qualified discharge through pH;
Mud in mud collecting tank is through pressure filter filter-press dehydration, and the dry mud cake after press filtration is transported to the mud concentration zones of specifying; Supernatant liquor in mud collecting tank, the pressing filtering liquid of pressure filter, return equalizing tank and process;
Wastewater treatment whole process is controlled automatically by PLC, and waste water ph is by the automatic measurement and monitoring of pH meter, and whole process all ingredients automatically controls volume pump by PLC and automatically adds, thus ensures the stable, continuous of wastewater treatment process, makes water outlet qualified discharge.
A kind of phosphatization and chemical nickel plating mixing comprehensive wastewater process automatic equipment, is characterized in that: comprise PLC control system, Waste Water Treatment, chemicals dosing plant, air agitation system;
Waste Water Treatment is connected successively by wastewater collection system, equalizing tank, first order reaction pond, tube settler groove, air-flotation system;
Wastewater collection system is made up of high-concentration waste liquid collecting tank, lower concentration Cleaning Wastewater collecting tank, and high-concentration waste liquid collecting tank is by waste drains pump, pipeline to equalizing tank, and lower concentration Cleaning Wastewater collecting tank passes through waste water pump, pipeline to equalizing tank;
Second order reaction pond is made up of coagulation tank and line mixer, and air-flotation system is made up of gas-holder, dissolving and air dissolved pump, slag scraper;
The sludge outlet of air-flotation system is to mud collecting tank, and the purified liquor outlet of air-flotation system adjusts back pond to pH value;
The supporting side being arranged on Waste Water Treatment of chemicals dosing plant, comprise liming chemicals dosing plant, CaCL2 chemicals dosing plant, PAC chemicals dosing plant, PAM chemicals dosing plant, means for feeding acid and liming chemicals dosing plant by pipeline to first order reaction pond, PAC chemicals dosing plant and PAM chemicals dosing plant also by pipeline to second order reaction pond, means for feeding acid adjusts back pond by pipeline to pH value;
Air agitation system, to chemicals dosing plant, wastewater collection system, mud collecting tank and pH value readjustment pond, utilizes pressurized air to realize agitating function;
PLC control system ensures automatic operating, its indicating meter Dynamic Announce sewage treatment process.
The waste water of two kinds of concentration is collected respectively and be its objective is, because low concentration wastewater flow is large, continuous blow-down, waste water easily processes up to standard, if high-concentration waste liquid all flows in low concentration wastewater quickly, is then unfavorable for wastewater treatment, need the chemical reagent adding a large amount of process, even and if verification experimental verification shows to add a large amount of chemical reagent, the waste water of its discharge is also difficult to process, can not be up to standard.
Equalizing tank collects the high-concentration waste liquid quantitatively dripped and the lower concentration rinse water entered continuously, makes it in this pond, carry out homogeneous and all quantize, and the continous-stable process being convenient to treatment facility runs.
First order reaction pond regulates waste water ph, and the key equipment of dephosphorization and heavy metal ion, adds liming in this reaction tank, not only can dephosphorization, but also can adjust ph to realize removing the heavy metals such as nickel, zinc, manganese; Flocculation agent (PAC), coagulant aids (PAM) is added to promote to precipitate cohesion fast and sedimentation in this reaction tank; In addition, in this reaction tank, also CaCl is added
2with further dephosphorization, it has certain De-emulsification flocculent effect simultaneously, is conducive to oil removing and promotes precipitation; The automatic control and regulation of pH value in this process, wastewater treatment reagent is added automatically; PH value is detected automatically by pH meter, and chemical reagent is quantitatively added by volume pump, by the automatic control of control realization pH value and automatically the adding of chemical reagent of PLC.
Tube settler groove is that waste water that first order reaction pond is processed and throw out wherein realize settle precipitates, and discharges clear liquid, and the mud settled down enters mud collecting tank automatically by pipeline, finally through pressure filter press filtration to remove out phosphorus and heavy metal contaminants.
Second order reaction pond is dosing coagulant PAC and PAM coagulant aids, and the molecule, oily substance etc. that make to be difficult to precipitate flocculate into larger particles in air-flotation system to be removed, thus secondary waste water is purified.
PH value readjustment pond its add after pH adjusts back 6 ~ 9 by acid solution by pH value automatic control system, up to standardly directly enter company's sewer line.
The invention has the beneficial effects as follows: phosphatization and chemical nickel plating mixing comprehensive wastewater are through multiple-stage treatment, and whole process is controlled automatically by PLC, indicating meter Dynamic Announce wastewater treatment whole process, technique is simple, and dosage is few, and the water quality standard after process is high, working cost is low, economy, and processing efficiency is high.
Accompanying drawing explanation
Fig. 1 is the schematic layout pattern of a kind of phosphatization and chemical nickel plating mixing comprehensive wastewater process automated arm.
Embodiment
Below in conjunction with Fig. 1, the present invention will be further described.
As shown in Figure 1, a kind of phosphatization and chemical nickel plating mixing comprehensive wastewater process automatic equipment, comprise PLC control system (not expressing in Fig. 1), Waste Water Treatment, chemicals dosing plant, air agitation system,
Waste Water Treatment is connected successively by wastewater collection system, equalizing tank, first order reaction pond, tube settler groove, air-flotation system;
Wastewater collection system is made up of high-concentration waste liquid collecting tank, lower concentration Cleaning Wastewater collecting tank, and high-concentration waste liquid collecting tank is by waste drains pump, pipeline to equalizing tank, and lower concentration Cleaning Wastewater collecting tank passes through waste water pump, pipeline to equalizing tank;
Second order reaction pond is made up of coagulation tank and line mixer, and air-flotation system is made up of gas-holder, dissolving and air dissolved pump, slag scraper;
The sludge outlet of air-flotation system is to mud collecting tank, and the purified liquor outlet of air-flotation system adjusts back pond to pH value;
The supporting side being arranged on Waste Water Treatment of chemicals dosing plant, comprise liming chemicals dosing plant, CaCL2 chemicals dosing plant, PAC chemicals dosing plant, PAM chemicals dosing plant, means for feeding acid and liming chemicals dosing plant by pipeline to first order reaction pond, PAC chemicals dosing plant and PAM chemicals dosing plant also by pipeline to second order reaction pond, means for feeding acid adjusts back pond by pipeline to pH value;
Air agitation system, to chemicals dosing plant, wastewater collection system, mud collecting tank and pH value readjustment pond, utilizes pressurized air to realize agitating function;
PLC control system ensures automatic operating, its indicating meter Dynamic Announce sewage treatment process.
Shown in Fig. 1, air agitation system is made up of gas-holder and pipeline, from the dotted line that gas-holder is drawn in Fig. 1, and the position that the gas-holder pressurized air out of expression will reach by the road.
As shown in Figure 1, a kind of phosphatization is further described and chemical nickel plating mixing comprehensive effluent disposal technology is as follows:
First high-concentration waste liquid and lower concentration Cleaning Wastewater are collected respectively, the high-concentration waste liquid then making quantitatively instillation in wastewater equalization pond and the equal quantification treatment of lower concentration Cleaning Wastewater homogeneous entered continuously;
Then the waste water that homogeneous all quantizes enters first order reaction pond through pH regulator, adds liming, calcium chloride, flocculation agent PAC, coagulant aids PAM, after mechanical stirring and chemical reaction, and OH
-mn in ion and Phosphating Solution
2+, Ni
2+, Zn
2+deng metal ion and PO
4 3-with Ca
2+formed chemical reaction and generate solids suspension matter;
In tube settling groove, carry out solid-liquid separation first, heavy metal ion and phosphorus are removed, the mud out of solid-liquid separation first enters mud collecting tank, and liquid enters second order reaction pond; Second order reaction pond comprises coagulation tank and line mixer, coagulating agent PAC and coagulant aids PAM is added in second order reaction pond, the molecule, oily substance etc. that make to be difficult to precipitate flocculate into larger particles in air-flotation process system to be removed, thus secondary waste water is purified;
Waste water enters air-flotation system after the process of second order reaction pond, and the slag scraper of oil pollutant in air-flotation system of the suspended matter and emulsification that are suspended in wastewater surface scrapes off and enter mud collecting tank, and clear liquid enters in pH value readjustment pond, adjusts back qualified discharge through pH;
Mud in mud collecting tank is through pressure filter filter-press dehydration, moisture percentage in sewage sludge is down to about 70% ~ 80%, dry mud cake after press filtration is transported to the mud concentration zones of specifying by mud transfer roller, be transported to place landfill or stacking that local environmental administration specifies outside mud cake, the pressing filtering liquid of sludge concentration tank supernatant liquor, sludge filter press returns equalizing tank and processes;
Wastewater treatment whole process is controlled automatically by PLC, process is run automatically, and waste water ph is by the automatic measurement and monitoring of pH meter, and whole process all ingredients automatically controls volume pump by PLC and automatically adds, thus ensure the stable, continuous of wastewater treatment process, make water outlet qualified discharge.
Described PLC control system realizes phosphatization comprehensive wastewater treating processes and equipment automatic operating, is discharge of wastewater Key Control up to standard.The adjustment of its control ph, the automatic interpolation of various chemical reagent, the automatic operation etc. of pump class, make final outflow water qualified discharge, its indicating meter Dynamic Announce sewage treatment process.
Described high-concentration waste liquid collecting tank is used for collecting phosphating line electrochemical deoiling, pickling, table are adjusted, the waste liquid of phosphatization and chemical nickel plating station periodic exhaustion.
The various Cleaning Wastewater of discharging when described lower concentration Cleaning Wastewater collecting tank is used for collecting phosphating line operation.
Described equalizing tank collects the high-concentration waste liquid quantitatively dripped and the lower concentration rinse water entered continuously, makes the waste water of two kinds of concentration in this pond, carry out homogeneous and all quantize.
Described first order reaction pond regulates waste water ph, the key equipment of dephosphorization and heavy metal ion.Liming, calcium chloride, flocculation agent (PAC), coagulant aids (PAM) is added in this reaction tank, liming not only can dephosphorization, but also can adjust ph to realize heavy metal such as removing nickel, zinc, manganese etc., flocculation agent (PAC), coagulant aids (PAM) are to promote to precipitate cohesion fast and sedimentation, CaCl
2with further dephosphorization, it has certain De-emulsification flocculent effect simultaneously, is conducive to oil removing and promotes precipitation.
Described tube settler groove is that waste water that first order reaction pond is processed and throw out wherein realize settle precipitates, and discharges clear liquid, and the mud settled down enters mud collecting tank automatically by pipeline, finally through pressure filter press filtration to remove out phosphorus and heavy metal contaminants.
Described second order reaction pond comprises coagulation tank, line mixer, dosing coagulant PAC and coagulant aids PAM, the molecule, oily substance etc. that make to be difficult to precipitate flocculate into larger particles in air-flotation process system to be removed, thus secondary waste water is purified.
Described air-flotation system, comprises air-floating apparatus, gas-holder, dissolving and air dissolved pump, slag scraper, adopts part pressurized dissolved air flotation technological design, can remove the materials such as suspended solid in waste water and various oil slick to greatest extent.The mud gravity flow that air flotation processing device produces is drained into sludge sump.
Described pH value readjustment pond its add after pH adjusts back 6 ~ 9 by acid solution by pH value automatic control system, up to standardly directly enter company's sewer line.
Described chemicals dosing plant is used for the liming, the CaCl that dissolve blending process normality respectively
2, PAC, PAM and acid solution solution, the solution prepared is added to each toss area through volume pump metering, and each reagent pot adopts mechanical stirring.
Described air agitation system is the stirring realizing each reaction tank, wastewater collection pond etc., makes the solid of waste water or suspended matter be unlikely to sedimentation.
Claims (3)
1. phosphatization and a chemical nickel plating mixing comprehensive effluent disposal technology, concrete steps are:
First high-concentration waste liquid and lower concentration Cleaning Wastewater are collected respectively, the high-concentration waste liquid then making quantitatively instillation in wastewater equalization pond and the equal quantification treatment of lower concentration Cleaning Wastewater homogeneous entered continuously;
Then the waste water that homogeneous all quantizes enters first order reaction pond through pH regulator, adds liming, calcium chloride, flocculation agent PAC, coagulant aids PAM, after mechanical stirring and chemical reaction, and OH
-mn in ion and Phosphating Solution
2+, Ni
2+, Zn
2+deng metal ion and PO
4 3-with Ca
2+formed chemical reaction and generate solids suspension matter;
In tube settling groove, carry out solid-liquid separation first, heavy metal ion and phosphorus are removed, the mud out of solid-liquid separation first enters mud collecting tank, and liquid enters second order reaction pond; Second order reaction pond comprises coagulation tank and line mixer, adds coagulating agent PAC and coagulant aids PAM in second order reaction pond, makes the molecule, oily substance etc. being difficult to precipitate flocculate into larger particles;
Waste water enters air-flotation system after the process of second order reaction pond, the slag scraper of oil pollutant in air-flotation system of the suspended matter and emulsification that are suspended in wastewater surface scrapes off and enters mud collecting tank, the waste water that tube settling groove is come obtains secondary-cleaned, clear liquid after secondary-cleaned enters in pH value readjustment pond, adjusts back qualified discharge through pH;
Mud in mud collecting tank is through pressure filter filter-press dehydration, and the dry mud cake after press filtration is transported to the mud concentration zones of specifying; Supernatant liquor in mud collecting tank, the pressing filtering liquid of pressure filter, return equalizing tank and process;
Wastewater treatment whole process is controlled automatically by PLC, and waste water ph is by the automatic measurement and monitoring of pH meter, and whole process all ingredients automatically controls volume pump by PLC and automatically adds, thus ensures the stable, continuous of wastewater treatment process, makes water outlet qualified discharge.
2. a kind of phosphatization described in claim 1 and chemical nickel plating mixing comprehensive effluent disposal technology, it is characterized in that: in first order reaction pond, add liming, calcium chloride, flocculation agent PAC and coagulant aids PAM, liming had both been used for regulating waste water ph to remove the heavy metals such as nickel zinc-manganese, again can dephosphorization, calcium chloride is with further dephosphorization, it has certain De-emulsification flocculent effect simultaneously, is conducive to oil removing and promotes precipitation.
3. phosphatization and a chemical nickel plating mixing comprehensive wastewater process automatic equipment, is characterized in that: comprise PLC control system, Waste Water Treatment, chemicals dosing plant, air agitation system;
Waste Water Treatment is connected successively by wastewater collection system, equalizing tank, first order reaction pond, tube settler groove, air-flotation system;
Wastewater collection system is made up of high-concentration waste liquid collecting tank, lower concentration Cleaning Wastewater collecting tank, and high-concentration waste liquid collecting tank is by waste drains pump, pipeline to equalizing tank, and lower concentration Cleaning Wastewater collecting tank passes through waste water pump, pipeline to equalizing tank;
Second order reaction pond is made up of coagulation tank and line mixer, and air-flotation system is made up of gas-holder, dissolving and air dissolved pump, slag scraper;
The sludge outlet of air-flotation system is to mud collecting tank, and the purified liquor outlet of air-flotation system adjusts back pond to pH value;
The supporting side being arranged on Waste Water Treatment of chemicals dosing plant, comprise liming chemicals dosing plant, CaCL2 chemicals dosing plant, PAC chemicals dosing plant, PAM chemicals dosing plant, means for feeding acid and liming chemicals dosing plant by pipeline to first order reaction pond, PAC chemicals dosing plant and PAM chemicals dosing plant also by pipeline to second order reaction pond, means for feeding acid adjusts back pond by pipeline to pH value;
Air agitation system, to chemicals dosing plant, wastewater collection system, mud collecting tank and pH value readjustment pond, utilizes pressurized air to realize agitating function;
PLC control system ensures automatic operating, its indicating meter Dynamic Announce sewage treatment process.
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