CN102923873A - Online water circulation purifying system for aluminum section surface treatment - Google Patents
Online water circulation purifying system for aluminum section surface treatment Download PDFInfo
- Publication number
- CN102923873A CN102923873A CN2011102297911A CN201110229791A CN102923873A CN 102923873 A CN102923873 A CN 102923873A CN 2011102297911 A CN2011102297911 A CN 2011102297911A CN 201110229791 A CN201110229791 A CN 201110229791A CN 102923873 A CN102923873 A CN 102923873A
- Authority
- CN
- China
- Prior art keywords
- microfiltration membrane
- water
- liquid
- valve
- tank body
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention discloses an online water circulation purifying system for aluminum section surface treatment. The aluminum section system comprises a pretreatment system for treating wastewater to be purified, a microfiltration membrane separation system, a water break system, a blowback residue removal system, a backwash system and a circuit and program control system, the circuit and program control system controls water to enter the pretreatment system, and the pretreated wastewater is commonly acted by the microfiltration membrane separation system, the water break system, the backflow residue removal system and the backwash system which are controlled by the circuit and program control system, so the wastewater is purified and reutilized, and waste residues are recovered. The online water circulation purifying system allows a microfiltration membrane separation technology to be firstly applied in the aluminum section surface treatment technology, and a scheme that water washing tanks in all the operations of the aluminum section surface treatment technology are purified and circulated to be firstly provided, and has the advantages of realization of the recovery and the comprehensive utilization of the waste residues without the addition of a flocculating agent, water resource saving, aluminum section surface treatment cost reduction, and realization of the zero wastewater discharge in the aluminum section surface treatment.
Description
Technical field
The invention belongs to the environmental technology field in the aluminium shape surface treatment process, more specifically relate to a kind of aluminium shape surface and process online water cycle purification system.
Background technology
Surface treatment be utilize physics, chemistry, perhaps additive method, the one deck that forms in the metallic surface has certain thickness, is different from body material and the tectum of certain reinforcement, protection or specific function is arranged.Process of surface treatment comprises substrate pretreatment, coating preparation, three parts of coating aftertreatment.The master operation that typical aluminium shape surface is processed comprises chemical rightenning, oil removing, alkaline etching, pickling, neutralization, oxidation, sealing of hole, painted, passivation etc.In each operation, all use various soda acids to make surperficial treatment solution, because the viscosity of various treatment solutions and physicochemical property are different, aluminium shape surface can be processed the thick liquid membrane of taking different amounts the tank liquor out of from these viscosity, need a large amount of clear water to clean and remove these liquid films, process aluminium per ton and consume approximately 25～30 cubic metres of water, the water after cleaning becomes the main waste water that aluminium shape surface is processed.Present aluminium section bar manufacturing enterprise more than 90% adopts fluorine-containing technology that aluminium shape surface is processed, and produces waste water containing fluorine, because the chemical agent that each operation is added in chemical liquid groove is different, and the composition more complicated of pollutent.Mainly be divided into according to composition waste water: the COD that sour degreasing process produces is higher and contain the organic waste water of a certain amount of fluorion; Fluorine-containing, the waste water that ammonia nitrogen exceed standard of acid etching operation because using that hydrogen fluoride amine produces; The chromate waste water that produces in the painting process etc.Chromate waste water needs individual curing, regulates through water amount and PH, and adding ferrous sulfate, Sodium Pyrosulfite etc. is trivalent chromium as reductive agent with the hexavalent chrome reduction of waste water, by regulating PH chromium ion is removed with precipitation forms again.The processing of fluoride waste with that, enterprise generally adopts the lime reaction coagulant sedimentation that waste water is carried out primary treatment, i.e. feeding lime in the waste water, make fluorion and calcium ion generate the CaF2 precipitation and remove, the advantages such as this technique is simple, processing is convenient, expense is low, but the water after processing is fluorine-containing still high, water quality difficult up to standard can not safety dumping, thereby the low and easy precipitated parcel of solubleness can't fully react the quantity that adds and Duo one to two times than the amount that real reaction needs though lime is cheap, the shortcoming such as also have the body refuse sedimentation slowly and dehydration is difficult.Therefore fluoride waste also need carry out secondary treatment, and its manufacturing process determination must consider to adopt two-stage coagulation, and strict controlling run condition just can reach emission standard.The coagulation way can be divided into again grey method, lime-aluminium salt method, lime-magnesium salts method, lime-calcium superphosphate method etc. according to the difference of institute's with medicament.Cause like this processing complex procedures and the cost height of waste water.
The aluminium shape surface treatment process is traditional is divided into alkaline etching technique and acid etching technique, no matter which kind of mode, each road technique that aluminium shape surface is processed includes processes and clean, and produces a large amount of Cleaning Wastewater and dense waste liquid.Main pollutent comprises fluorion, ammonia nitrogen, chemical oxygen demand (COD), sexavalent chrome, organism, sulfate radical, phosphate radical etc. in the aluminium factory effluent, know according to front surface analysis: even discharge by the secondary discharge standard of at present requirement, still can cause certain pollution to water body, failing qualified discharge then endangers larger.The general employing in the sludge components that neutralization is regulated and coagulant sedimentation art breading waste water obtains except containing a large amount of aluminum compound and calcium cpd, also contain the compounds such as zinc in a small amount, nickel, copper, the composition more complicated, most factory adopts the method for landfill to process these mud.This not only takies the Limited Land resource, and the waste resource, contaminate environment.
This shows, if the waste water that produces can not recycle, will cause the large waste of water resources, process the improper waste that not only environment is caused serious pollution but also cause a large amount of waste residues of waste water.China has become the big producing country of world aluminum section bar through the great development of two more than ten years, and aluminium section bar output was sure to occupy the No. 1 in the world in continuous 5 years.Present national aluminium shape surface is processed annual 9200000 tons, and Guangdong Province's yearly capacity is above more than 200 ten thousand tons.Aluminium per ton consumes 15～40 kilograms of aluminium through surface treatment, produces simultaneously 150～400 kilograms of waste slag of aluminum.Calculate with this, national annual waste residue amount 138～3,680,000 tons be equivalent to several large-scale aluminium ores, and the bauxite resource of China is poor, is again simultaneously that aluminium consumes big country.The aluminium section bar enterprise that annual production is 100,000 tons is used for aluminium material surface and processes the year water consumption that each operation cleans and be about 250～3,000,000 m
3Therefore the research of in China aluminium shape surface being processed the waste water of discharging should only not be conceived to how to process and make its emission standard that reaches regulation, more should pay attention to cycling utilization of wastewater research and waste reside comprehensive utilization.The waste residue combination treatment of at present many aluminium section bar manufacturing enterprises is stacked and is unfavorable for very much waste reside comprehensive utilization.
Tradition acid etching and alkaline etching technique, water quality is good not after treatment for the waste water of each operation discharging, causes the water of energy reuse less, and most of directly outwards discharging not only causes water pollution but also waste a large amount of water resourcess.Had the people to apply for patent of invention in 2010, and used and floride-freely to process without ammonia four unifications, its advantage is: the first pair of waste water carries out filter operation (by the scum filtering bag is set) thereby the cyclically utilizing water displacement is few as far as possible; Second adopts and to add the flocculation agent mode waste residue is dewatered, but adds the performance that flocculation agent itself can destroy tank liquor, and making it not only can not reuse be so that the effective recycling of waste residue on the contrary, and it is difficult that waste residue is dewatered.This new aluminium shape surface treatment process still has discharge of wastewater, also wastes resource.
In sum, China is as aluminium section bar big producing country, and its waste water circulation and waste reside comprehensive utilization produce sustainable health development for aluminium section bar and environment protection all has very great meaning.Therefore wish in a hurry that waste water that each operation of aluminium shape surface treatment process produces can the usefulness that be recycled up to standard after purifying, and waste residue is fully utilized, also do not have at present technology can accomplish this step.The present invention proposes aluminium shape surface and processes online water cycle purification system realization wastewater zero discharge under this background, each operation that aluminium shape surface is processed realizes that online water cycle purifies, and dewater and become useful waste residue purifying trapped substance, really accomplish waste water circulation and waste reside comprehensive utilization purpose that aluminium shape surface is processed, kill two birds with one stone.
Summary of the invention
In order to address the above problem, the object of the present invention is to provide a kind of aluminium shape surface to process online water cycle purification system, a kind ofly can realize wastewater zero discharge, each operation that aluminium shape surface is processed realizes that online water cycle purifies, and dewater and become useful waste residue purifying trapped substance, accomplish that really waste water circulation that aluminium shape surface is processed and the aluminium shape surface of waste reside comprehensive utilization process online water cycle purification system.
For achieving the above object, the technical solution adopted in the present invention is: a kind of aluminium shape surface is processed online water cycle purification system, comprise the pretreatment system that need are purified liquid waste and processed, the microfiltration membrane separation system, the water-break system, the blowback dreg removing system, the Controlling System of back cleaning system and circuit and program, the Controlling System control waste water of circuit and program enters pretreatment system, waste water is again through the microfiltration membrane separation system of the Controlling System of oversampling circuit and program control after pretreatment, the water-break system, the blowback dreg removing system, the acting in conjunction of back cleaning system is with purification of waste water recycling and recovery waste residue.
More excellent, described pretreatment system comprises a pretreatment tank T1.
More excellent, described microfiltration membrane separation system comprises microfiltration membrane tank body E1, liquid feeding pump P1 and two switch-valves, two switch-valves are respectively liquid feed valve V1, liquid-outlet valve V2, microfiltration membrane tank body E1 bottom is provided with bottom, liquid outlet after waste water fluid inlet, top were provided with and purify before bottom one side was provided with and purifies, microfiltration membrane tank body the inside are that the tubulose microfiltration membrane of the autonomous processing of many processes vertically fits together according to the floral disc mounting means.
More excellent, described water-break system comprises microfiltration membrane tank body E1, air compressor E2, dashpot T2, reflux pump P2 and three switch-valves, and three switch-valves are respectively liquid-outlet valve V2, just blow valve V3 and return liquid valve V4 and consist of.
More excellent, described blowback dreg removing system comprises microfiltration membrane tank body E1, air compressor E2, belt filtering unit E3, dress slag car T3, dashpot T2, reflux pump P2 and back-flushing valve V5.
More excellent, described back cleaning system comprises microfiltration membrane tank body E1, clear liquid groove T4, scavenging pump P3 and three switch-valve: V6, microfiltration membrane tank body cleaning valve V7 and belt filtering unit strainer cleaning valve V8.
More excellent, described a kind of aluminium shape surface is processed online water cycle purification system and is used, and concrete steps are following double teacher:
The firstth, pretreatment stage.The waste water of each procedure discharging of aluminium shape surface treatment process is transported to and is cleaned wastewater trough T0, then be transported to pretreatment tank T1 from the bottom, contained pollution substance composition and the physicochemical property thereof of waste water according to each operation discharging, in pretreatment tank, add the corresponding appropriate chemical medicament that the present invention obtains through great many of experiments, make pollutent and these chemical agents in the waste water that chemistry and physical reaction fully occur, and the pH value of waste water is adjusted to less than 7.
The secondth, the microfiltration membrane pipe carries out the separating and filtering stage to waste liquid.Starting liquid feeding pump P1 and opening under the effect of liquid feed valve V1 and got in the tank body from the liquid inlet of microfiltration membrane tank body T2 bottom one side through pretreated waste water, be pressed into the microfiltration membrane pipe from microfiltration membrane pipe outside inner.The present invention by experiment testing needle is divided into two portions so that such waste water passes through the microfiltration membrane pipe under the microfiltration membrane isolation technique: the pollutent that is penetrated into the filtered liquid in the micro-filtration film body and is held back by the microfiltration membrane pipe to the microfiltration membrane pipe of the special autonomous processing treatment of process of the waste water characteristic selection of aluminium shape surface processing.Filtered liquid flows out from the liquid outlet of tank body, most ofly flows to and is cleaned wastewater trough T0 and finishes the waste water in-line purification and be recycled the process of using by opening liquid-outlet valve V2, and small part flows to clear liquid groove T4 as the water for subsequent use of back cleaning system by opening switch valve V6.The pollutent that the microfiltration membrane pipe is retained down forms the raw material of waste residue, opens microfiltration membrane tank body T2 bottom by control and is transported to belt filtering unit device.When setting peak pressure by circuit and sequence control system, the separating and filtering flux can drop to Schwellenwert, namely enter next stage, these peak pressures and Schwellenwert parameter be according to the waste water characteristic of different operation dischargings and difference, but big or small by time variable control.
The 3rd is system's water-break stage.This purification system is purified waste water during the stage at microfiltration membrane pipe separating and filtering waste liquid and has been in the state of recycling, and when the trapped substance of microfiltration membrane pipe was abundant, system need to stop filtration and turn the advance and retreat water state, and this moment, liquid feeding pump P1 stopped, and liquid feed valve V1 closes.Then start air compressor E2, utilize the mode of just blowing, open and just blowing valve V3 and returning liquid valve V4, on the one hand with a small amount of residue in the tank body not filtered liquid in V4 is discharged to dashpot T2, get back to through reflux pump P2 effect and be cleaned wastewater trough T0, clear liquor in the microfiltration membrane pipe is circulated back to through V2 and is cleaned wastewater trough T0 on the other hand, like this so that the interior residual moisture of tank body reduces the so just water-break work of energy completion system as far as possible.
The 4th is system's blowback deslagging stage.After finishing in the water-break stage, this purification system turned into the blowback deslagging stage at once.Start belt filtering unit E3 this moment, under the effect of 0.4～0.6MPa of air compressor E2 pressurized air, adopt pulse mode intermittently to open and close back-flushing valve V5, the material of holding back that is attached on the microfiltration membrane pipe is peeled off, the waste residue of being stripped from is discharged on the E3 by opening microfiltration membrane pipe tank body E1 bottom, discharge this moment together also has a small amount of remaining water of water-break stage, filter these water are leached through E3 and flow to dashpot T2 and get back to through reflux pump P2 and be cleaned wastewater trough T0, overburden is discharged dried slag by dress slag car T3 through scraper from the end of E3 by the E3 dehydration and is reclaimed.Deslagging finishes namely to close back-flushing valve V5 and microfiltration membrane pipe tank body E1 bottom, and E3 continues operation for some time, and the slag on its strainer is thoroughly discharged.Before E3 stops, the anti-washing unit of open system.
The 5th is the anti-wash phase of system.Finish rear anti-washing unit by circuit and sequence control system open system in the blowback deslagging stage.Closing switch valve V1, V2, V3, V5, V6 close pump P1 and air compressor E2, open scavenging pump P3 and two cleaning valve V7, V8.Clear liquor in the clear liquid groove T4 is divided into two-way under the effect of scavenging pump P3, one tunnel process microfiltration membrane tank body cleaning valve V7 flows to the microfiltration membrane tank body, and another road is arranged the operating strainer of nozzle cleaning belt filtering units through strainer cleaning valve V8 by two.Adopt pulse mode to open back-flushing valve V5 after filling clear liquor in the microfiltration membrane tank body, clean the microfiltration membrane pipe, the liquid after the cleaning enters in the T2 by opening V4.
After adopting technique scheme, its beneficial effect is: each road technical process synchronous operation that native system can cooperate aluminium shape surface to process, in the situation that does not add flocculation agent, the in-line purification of realization treatment solution also can recycle the clear water after the purification and will hold back the purpose that the material residue dewaters and reaches recovery aluminium slag.The washing bath of each road technique that native system and aluminium shape surface are processed forms closed cycle, realize wastewater zero discharge, saving water resource but also environment do not caused any pollution greatly not only, purification system is except can water cycle purifying and can also dewater holding back material, and the waste residue after the dehydration can be recovered effective utilization.
Description of drawings
Fig. 1 is the purification system principle assumption diagram;
Fig. 2 is the application example FB(flow block) of purification system in the alkaline etching production technique;
Fig. 3 is the application example FB(flow block) of purification system in the acid etching production technique;
Fig. 4 is that purification system is in the application example FB(flow block) of free-floride without ammonia four integrated production process.
Embodiment
The present invention is further detailed explanation below in conjunction with accompanying drawing.
As shown in Figure 1, a kind of aluminium shape surface is processed online water cycle purification system, comprise the purify liquid waste Controlling System of pretreatment system, microfiltration membrane separation system, water-break system, blowback dreg removing system, back cleaning system and circuit and the program processed of need, the Controlling System control waste water of circuit and program enters pretreatment system, waste water is again through the acting in conjunction of the microfiltration membrane separation system of the Controlling System of oversampling circuit and program control, water-break system, blowback dreg removing system, back cleaning system after treatment, with the purification of waste water recycling and reclaim waste residue.
Pretreatment system comprises a pretreatment tank T1; The microfiltration membrane separation system comprises microfiltration membrane tank body E1, liquid feeding pump P1 and two switch-valves, two switch-valves are respectively liquid feed valve V1, liquid-outlet valve V2, microfiltration membrane tank body E1 bottom is provided with bottom, liquid outlet after waste water liquid inlet, top were provided with and purify before bottom one side was provided with and purifies, microfiltration membrane tank body the inside are that the tubulose microfiltration membrane of the autonomous processing of many processes vertically fits together according to the floral disc mounting means; The water-break system comprises microfiltration membrane tank body E1, air compressor E2, dashpot T2, reflux pump P2 and three switch-valves, and three switch-valves are respectively liquid-outlet valve V2, just blow valve V3 and return liquid valve V4 and consist of; The blowback dreg removing system comprises microfiltration membrane tank body E1, air compressor E2, belt filtering unit E3, dress slag car T3, dashpot T2, reflux pump P2 and back-flushing valve V5; Back cleaning system comprises microfiltration membrane tank body E1, clear liquid groove T4, scavenging pump P3 and three switch-valve: V6, microfiltration membrane tank body cleaning valve V7 and belt filtering unit strainer cleaning valve V8; Do not add flocculation agent among the pretreatment tank T1.
Principle and beneficial effect: the present invention is directed to aluminum current Surface of profile treatment process and have that the waste water treatment of discharging is improper to cause these four major problems such as environmental pollution cost serious, that process fluorine and nitrogen ammonia is high, great lot of water resources is consumed, the waste residue of a large amount of resourcebility utilizations is wasted, utilize the microfiltration membrane technology to combine with the perfection of the appropriate chemical agent of selecting in the pre-treatment and propose a kind of online water cycle purification system, decontamination cycle and the waste residue of realizing each operation waste water of aluminium shape surface treatment process reclaim, and satisfy the requirement of the harmonious cleaning civilization of current environment.
The structure of purification system of the present invention mainly is made of six parts as shown in Figure 1: pretreatment system, microfiltration membrane separation system, water-break system, blowback dreg removing system, back cleaning system and circuit and sequence control system that need are purified liquid waste and carried out physicochemical property.Pretreatment system only has a work nest, before waste water enters the microfiltration membrane separation system, waste water is done pre-treatment work, and here waste water at first carries out some necessary chemical reactions and pH value carried out some adjust variation.Mainly be that pollutant component according to waste water adds different chemical agents in this work nest, such as for defluorination can add polymerize aluminum chloride, in order to add oxygenant except ammonia, can add the heavy metal trapping agent in order to remove heavy metal ion.Can directly enter the microfiltration membrane separation system through the waste water like this.The microfiltration membrane separation system is mainly by microfiltration membrane tank body E1, liquid feeding pump P1 and two switch-valves: liquid feed valve V1, liquid-outlet valve V2 consist of, the microfiltration membrane tank base is provided with bottom, liquid outlet after waste water liquid inlet, top were provided with and purify before bottom one side was provided with and purifies, microfiltration membrane tank body the inside is that the tubulose microfiltration membrane of the autonomous processing of many processes vertically fits together according to the floral disc mounting means, and this part is the most crucial technique device of system of the present invention.The water-break system is mainly by microfiltration membrane tank body E1, air compressor E2, dashpot T2, reflux pump P2 and three switch-valves: liquid-outlet valve V2, just blow valve V3 and return liquid valve V4 and consist of.The blowback dreg removing system mainly is made of microfiltration membrane tank body E1, air compressor E2, belt filtering unit E3, dress slag car T3, dashpot T2, reflux pump P2 and back-flushing valve V5.Back cleaning system mainly is made of microfiltration membrane tank body E1, clear liquid groove T4, scavenging pump P3 and three switch-valve: V6, microfiltration membrane tank body cleaning valve V7 and belt filtering unit strainer cleaning valve V8.The waste water circulation system mainly consists of by being cleaned wastewater trough T0, pretreatment tank T1, liquid feeding pump P1, liquid feed valve V1, microfiltration membrane tank body E1 and liquid-outlet valve V2.Belt is filtered waste residue dewatering and recovery system and mainly is made of microfiltration membrane tank body E1, belt filtering unit E3, dress slag car T3, dashpot T2.Circuit and sequence control system do not draw in the drawings, mainly are made of controlling box and control valve, and purpose is the operation by five part systems more than the procedure auto-control.
Do not need to add any flocculation agent and do not destroy in the situation that is cleaned liquid usefulness, the online water cycle purification system of the present invention is only passed through microfiltration membrane filtration once again after the special pre-treatment of process in the aluminium shape surface treatment process, just can be with the purification of waste water in the different process links, water quality after the purification well can be recycled fully, reach like this purpose of wastewater zero discharge, the residue that native system is held back microfiltration membrane simultaneously dewaters, and can reclaim waste residue, is convenient to recycling.The very identical present shortage of resources of such effect does one's utmost to advocate the situation requirement of environment protection.The workflow of native system specifically can be divided into five-stage:
The firstth, pretreatment stage.The waste water of each procedure discharging of aluminium shape surface treatment process is transported to and is cleaned wastewater trough T0, then be transported to pretreatment tank T1 from the bottom, contained pollution substance composition and the physicochemical property thereof of waste water according to each operation discharging, in pretreatment tank, add the corresponding appropriate chemical medicament that the present invention obtains through great many of experiments, make pollutent and these chemical agents in the waste water that chemistry and physical reaction fully occur, and the pH value of waste water is adjusted to less than 7.
The secondth, the microfiltration membrane pipe carries out the separating and filtering stage to waste liquid.Starting liquid feeding pump P1 and opening under the effect of liquid feed valve V1 and got in the tank body from the liquid inlet of microfiltration membrane tank body T2 bottom one side through pretreated waste water, be pressed into the microfiltration membrane pipe from microfiltration membrane pipe outside inner.The present invention by experiment testing needle is divided into two portions so that such waste water passes through the microfiltration membrane pipe under the microfiltration membrane isolation technique: the pollutent that is penetrated into the filtered liquid in the micro-filtration film body and is held back by the microfiltration membrane pipe to the microfiltration membrane pipe of the special autonomous processing treatment of process of the waste water characteristic selection of aluminium shape surface processing.Filtered liquid flows out from the liquid outlet of tank body, most ofly flows to and is cleaned wastewater trough T0 and finishes the waste water in-line purification and be recycled the process of using by opening liquid-outlet valve V2, and small part flows to clear liquid groove T4 as the water for subsequent use of cleaning system by opening switch valve V6.The pollutent that the microfiltration membrane pipe is retained down forms the raw material of waste residue, opens microfiltration membrane tank body T2 bottom by control and is transported to belt filtering unit device.When setting peak pressure by circuit and sequence control system, the separating and filtering flux can drop to Schwellenwert, namely enter next stage, these peak pressures and Schwellenwert parameter be according to the waste water characteristic of different operation dischargings and difference, but big or small by time variable control.
The 3rd is the water-break stage.This purification system is purified waste water during the stage at microfiltration membrane pipe separating and filtering waste liquid and has been in the state of recycling, and when the trapped substance of microfiltration membrane pipe was abundant, system need to stop filtration and turn the advance and retreat water state, and this moment, liquid feeding pump P1 stopped, and liquid feed valve V1 closes.Then start air compressor E2, utilize the mode of just blowing, open and just blowing valve V3 and returning liquid valve V4, on the one hand with a small amount of residue in the tank body not filtered liquid in V4 is discharged to dashpot T2, get back to through reflux pump P2 effect and be cleaned wastewater trough T0, clear liquor in the microfiltration membrane pipe is circulated back to through V2 and is cleaned wastewater trough T0 on the other hand, like this so that the interior residual moisture of tank body reduces the so just water-break work of energy completion system as far as possible.
The 4th is system's blowback deslagging stage.After finishing in the water-break stage, this purification system turned into the blowback deslagging stage at once.Start belt filtering unit E3 this moment, under the effect of 0.4～0.6MPa of air compressor E2 pressurized air, adopt pulse mode intermittently to open and close back-flushing valve V5, the material of holding back that is attached on the microfiltration membrane pipe is peeled off, the waste residue of being stripped from is discharged on the E3 by opening microfiltration membrane pipe tank body E1 bottom, discharge this moment together also has a small amount of remaining water of water-break stage, filter these water are leached through E3 and flow to dashpot T2 and get back to through reflux pump P2 and be cleaned wastewater trough T0, overburden is discharged dried slag by dress slag car T3 through scraper from the end of E3 by the E3 dehydration and is reclaimed.Deslagging finishes namely to close back-flushing valve V5 and microfiltration membrane pipe tank body E1 bottom, and E3 continues operation for some time, and the slag on its strainer is thoroughly discharged.Before E3 stops, the anti-washing unit of open system.
The 5th is the anti-wash phase of system.Finish rear anti-washing unit by circuit and sequence control system open system in the blowback deslagging stage.Closing switch valve V1, V2, V3, V5, V6 close pump P1 and air compressor E2, open scavenging pump P3 and two cleaning valve V7, V8.Clear liquor in the clear liquid groove T4 is divided into two-way under the effect of scavenging pump P3, one tunnel process microfiltration membrane tank body cleaning valve V7 flows to the microfiltration membrane tank body, and another road is arranged the operating strainer of nozzle cleaning belt filtering units through strainer cleaning valve V8 by two.Adopt pulse mode to open back-flushing valve V5 after filling clear liquor in the microfiltration membrane tank body, clean the microfiltration membrane pipe, the liquid after the cleaning enters in the T2 by opening V4.
By this double teacher, purification system is finished a circulation.Anti-wash phase reopens liquid feeding pump P1, liquid feed valve V1 and liquid-outlet valve V2 after finishing, and system enters the first subordinate phase working order.When liquid is too much in the dashpot T2, open reflux pump P2, unnecessary liquid is flow back to be cleaned wastewater trough T0.Along with the carrying out of this double teacher, whole online water cycle purification system can ideally be finished waste water circulation and the waste residue of aluminium shape surface treatment process and recycle this two work, has realized veritably the wastewater zero discharge that aluminium shape surface is processed.When the work of aluminium shape surface process for producing toe-in bundle, when not needing water cycle, the clear liquor behind this system purification can outwards discharge relievedly from liquid-outlet valve V2, does not have any problem of environmental pollution.
Should be noted following problem in the system:
1, the online water cycle that adopts the microfiltration membrane technology to realize that aluminium shape surface is processed purifies, can obtain can recycle rinse water and the waste residue after the dehydration, thereby realize the recycling of wastewater zero discharge and waste residue, whole purification system does not add flocculation agent.
2, the aluminium shape surface waste water of processing the discharging of each operation needs pH value is adjusted to less than 7 before purification.
3, the microfiltration membrane pipe that uses of whole purification system is that a kind of polyethylene, polypropylene or tetrafluoroethylene millipore filtration of adopting is the micropore filtering film of base material, and the filtration mean pore size of film is 0.1～100 μ m, and the mode of holding back of film is to build bridge to hold back.
4, microfiltration membrane be shaped as tubular type, the diameter of film belongs to tubular membrane greater than 10 millimeters, the film pipe can bear hydraulic pressure and the air pressure of 1MPa.Micro-filtration membrane module adopts the floral disc mounting means to be assembled in vertically in the tank body.
5, the waste water separating and filtering stage of this purification system is adopted the noncorrosive pump pressuring method, the hydraulic pressure that operating pressure can be born less than the film pipe and the maximum value of air pressure.
6, the blowback deslagging stage of this purification system is adopted the air pulsing mode, and compressed air pressure 0.4～0.6MPa, the slag that institute's blowback is discharged further are filtered through belt filtering device and are separated into dried slag and water.
Each road technique independent and that aluminium shape surface is processed formed circulation when 7, this purification system was worked, waste water and dense waste residue liquid after each road technique is cleaned in processing for aluminium shape surface purify, and the water after will purifying again cyclically utilizing to the cleaning use of corresponding operation.Therefore the waste water that discharges after each operation is carried out becoming the clear water that can be recycled through purification system again after the pre-treatment work such as adjusting of pH value, so this purification system and aluminium shape surface alkaline etching or acid etching or the floride-free washing bath formation closed cycle without each the road technique in ammonia four integrated production process processed.
From above analysis, purification system of the present invention has following important breakthrough:
The first, the present invention is applied in the microfiltration membrane isolation technique water substance and the pollution substance that separates waste water in the aluminium shape surface treatment process first.
The second, the present invention realizes the online water cycle purification work of each operation of aluminium shape surface treatment process first, greatly saves water resources, reduces the cost that aluminium shape surface is processed, and realizes the wastewater zero discharge that aluminium shape surface is processed.
The 3rd; the present invention is applied in belt filtering device first the aluminium shape surface treatment process waste residue is dewatered; the waste residue of realizing the aluminium shape surface treatment process reclaims comprehensive utilization work; guarantee the protection of environment, solved many aluminium section bar manufacturing enterprise's existing waste residue dehydration difficulties and waste residue combination treatment and stacked improperly problem.
The 4th, the present invention does not need to throw in flocculation agent first with regard to the waste water in the energy purification treatment aluminium shape surface treatment process, and water-saving is economized medicine.
The 5th, system of the present invention does not have selectivity first, can be adapted to different aluminium shape surface treatment process, comprises that the free-floride of alkaline etching technique, acid etching technique and application proposition in 2010 is without ammonia four unification treatment process.
The 6th, system of the present invention proposes the scheme that the washing bath to each operation of aluminium shape surface treatment process purifies respectively and circulates first, can independent operating.
[embodiment]
Application in the example 1---alkaline etching production technique
The alkaline etching technological process of production among Fig. 2 sequentially is: oil removing-washing-alkaline etching-washing-neutralization-washing-oxidation-washing-painted-washing-sealing of hole-washing, wherein the washing bath rinse water in each link can adopt purification system of the present invention to purify.The oil removing tank liquor adopts the oxidation spent acid usually, the sulfuric acid that contains 150～200g/L, some can add ammonium bifluoride and the tensio-active agent of 20～30g/L, these treatment solutions are brought subsequently washing bath into aluminium, and the purification system of this link need add polymerize aluminum chloride, and that F is formed is not tolerant, adds oxygenant and removes ammonia, add alkali and regulate pH value, pass through filter dehydration, filtered water is returned washing bath again, recycles.Alkaline etching adopts NaOH solution usually, and washing bath rinse water thereafter enters purification system and adopts dilute sulphuric acid to regulate pH value, through filtration, and recyclable a large amount of aluminium hydroxide solid, purifying filtered water returns washing bath, recycles.Washing bath rinse water behind the neutralizing well can directly be filtered through purification system, does not need pre-treatment to regulate.Washing bath rinse water behind the oxidation trough enters purification system, by alkali neutralization and filtration, and recyclable a large amount of aluminium hydroxide solid, filtered water recycles.Contain nickel acetate or nickelous fluoride in painted groove and the sealing of hole groove treatment solution, washing bath rinse water thereafter enters purification system need to add heavy metal trapping agent, polymerize aluminum chloride and alkali neutralization, then filters, and this two portions water consumption is less.
Example 2-acid etching production technique is used:
Acid etching technique grows up in alkaline etching technique, is to add the acid etching groove between degreasing tank in the ortho acid etching technique and the alkaline etching groove to form.The acid etching technological process of production among Fig. 3 sequentially is: oil removing-washing-acid etching-washing-alkaline etching-washing-neutralization-washing-oxidation-washing-painted-washing-sealing of hole-washing, wherein the washing bath rinse water in each link can adopt purification system of the present invention to purify.The ammonium bifluoride that contains 60-100g/L because of the acid etching tank liquor, thereafter ammonium bifluoride concentration is higher in the washing bath rinse water, enters purification system and need to add polymerize aluminum chloride and oxygenant conditioning, then regulates pH value with caustic soda, through filtering recyclable a large amount of aluminium hydroxide solid.The applied links of other parts is with example 1.
Example 3-free-floride is used without ammonia four integrated production process:
Fig. 4 is that the free-floride that application in 2010 proposes is unified treatment process without ammonia four, its process sequence is: floride-free without ammonia four unification sand face-zero diopter-washing-oxidation-washing-painted-washing-sealing of hole-washings, wherein the washing bath rinse water in each link can adopt purification system of the present invention to purify.Washing entrapping tank tank liquor behind the zero diopter groove does not need conditioning, enters the purification system direct filtration, recyclable a large amount of aluminium hydroxide solid, and the tank liquor after the filtration only has requirement to concentration of suspension.The use of other link is with example 1.
Above-described only is preferred implementation of the present invention, should be pointed out that for the person of ordinary skill of the art, under the prerequisite that does not break away from the invention design, can also make some distortion and improvement, and these all belong to protection scope of the present invention.
Claims (8)
1. an aluminium shape surface is processed online water cycle purification system, comprise the purify liquid waste Controlling System of pretreatment system, microfiltration membrane separation system, water-break system, blowback dreg removing system, back cleaning system and circuit and the program processed of need, the Controlling System control waste water of circuit and program enters pretreatment system, waste water is again through the acting in conjunction of the microfiltration membrane separation system of the Controlling System of oversampling circuit and program control, water-break system, blowback dreg removing system, back cleaning system after pretreatment, with the purification of waste water recycling and reclaim waste residue.
2. a kind of aluminium shape surface according to claim 1 is processed online water cycle purification system, it is characterized in that, described pretreatment system comprises a pretreatment tank T1.
3. a kind of aluminium shape surface according to claim 2 is processed online water cycle purification system, it is characterized in that, described microfiltration membrane separation system comprises microfiltration membrane tank body E1, liquid feeding pump P1 and two switch-valves, two switch-valves are respectively liquid feed valve V1, liquid-outlet valve V2, microfiltration membrane tank body E1 bottom is provided with bottom, liquid outlet after waste water fluid inlet, top were provided with and purify before bottom one side was provided with and purifies, microfiltration membrane tank body the inside are that the tubulose microfiltration membrane of the autonomous processing of many processes vertically fits together according to the floral disc mounting means.
4. a kind of aluminium shape surface according to claim 3 is processed online water cycle purification system, it is characterized in that, described water-break system comprises microfiltration membrane tank body E1, air compressor E2, dashpot T2, reflux pump P2 and three switch-valves, and three switch-valves are respectively liquid-outlet valve V2, just blow valve V3 and return liquid valve V4 and consist of.
5. a kind of aluminium shape surface according to claim 4 is processed online water cycle purification system, it is characterized in that described blowback dreg removing system comprises microfiltration membrane tank body E1, air compressor E2, belt filtering unit E3, dress slag car T3, dashpot T2, reflux pump P2 and back-flushing valve V5.
6. a kind of aluminium shape surface according to claim 5 is processed online water cycle purification system, it is characterized in that described back cleaning system comprises microfiltration membrane tank body E1, clear liquid groove T4, scavenging pump P3 and three switch-valve: V6, microfiltration membrane tank body cleaning valve V7 and belt filtering unit strainer cleaning valve V8.
7. a kind of aluminium shape surface according to claim 6 is processed online water cycle purification system, it is characterized in that, does not add flocculation agent among the described pretreatment tank T1.
8. according to claim 1 described a kind of aluminium shape surface is processed online water cycle purification system and use, concrete steps are following double teacher:
The firstth, pretreatment stage.The waste water of each procedure discharging of aluminium shape surface treatment process is transported to and is cleaned wastewater trough T0, then be transported to pretreatment tank T1 from the bottom, contained pollution substance composition and the physicochemical property thereof of waste water according to each operation discharging, in pretreatment tank, add the corresponding appropriate chemical medicament that the present invention obtains through great many of experiments, make pollutent and these chemical agents in the waste water that chemistry and physical reaction fully occur, and the pH value of waste water is adjusted to less than 7.
The secondth, the microfiltration membrane pipe carries out the separating and filtering stage to waste liquid.Starting liquid feeding pump P1 and opening under the effect of liquid feed valve V1 and got in the tank body from the liquid inlet of microfiltration membrane tank body T2 bottom one side through pretreated waste water, be pressed into the microfiltration membrane pipe from microfiltration membrane pipe outside inner.The present invention by experiment testing needle is divided into two portions so that such waste water passes through the microfiltration membrane pipe under the microfiltration membrane isolation technique: the pollutent that is penetrated into the filtered liquid in the micro-filtration film body and is held back by the microfiltration membrane pipe to the microfiltration membrane pipe of the special autonomous processing treatment of process of the waste water characteristic selection of aluminium shape surface processing.Filtered liquid flows out from the liquid outlet of tank body, most ofly flows to and is cleaned wastewater trough T0 and finishes the waste water in-line purification and be recycled the process of using by opening liquid-outlet valve V2, and small part flows to clear liquid groove T4 as the water for subsequent use of back cleaning system by opening switch valve V6.The pollutent that the microfiltration membrane pipe is retained down forms the raw material of waste residue, opens microfiltration membrane tank body T2 bottom by control and is transported to belt filtering unit device.When setting peak pressure by circuit and sequence control system, the separating and filtering flux can drop to Schwellenwert, namely enter next stage, these peak pressures and Schwellenwert parameter be according to the waste water characteristic of different operation dischargings and difference, but big or small by time variable control.
The 3rd is system's water-break stage.This purification system is purified waste water during the stage at microfiltration membrane pipe separating and filtering waste liquid and has been in the state of recycling, and when the trapped substance of microfiltration membrane pipe was abundant, system need to stop filtration and turn the advance and retreat water state, and this moment, liquid feeding pump P1 stopped, and liquid feed valve V1 closes.Then start air compressor E2, utilize the mode of just blowing, open and just blowing valve V3 and returning liquid valve V4, on the one hand with a small amount of residue in the tank body not filtered liquid in V4 is discharged to dashpot T2, get back to through reflux pump P2 effect and be cleaned wastewater trough T0, clear liquor in the microfiltration membrane pipe is circulated back to through V2 and is cleaned wastewater trough T0 on the other hand, like this so that the interior residual moisture of tank body reduces the so just water-break work of energy completion system as far as possible.
The 4th is system's blowback deslagging stage.After finishing in the water-break stage, this purification system turned into the blowback deslagging stage at once.Start belt filtering unit E3 this moment, under the effect of 0.4～0.6MPa of air compressor E2 pressurized air, adopt pulse mode intermittently to open and close back-flushing valve V5, the material of holding back that is attached on the microfiltration membrane pipe is peeled off, the waste residue of being stripped from is discharged on the E3 by opening microfiltration membrane pipe tank body E1 bottom, discharge this moment together also has a small amount of remaining water of water-break stage, filter these water are leached through E3 and flow to dashpot T2 and get back to through reflux pump P2 and be cleaned wastewater trough T0, overburden is discharged dried slag by dress slag car T3 through scraper from the end of E3 by the E3 dehydration and is reclaimed.Deslagging finishes namely to close back-flushing valve V5 and microfiltration membrane pipe tank body E1 bottom, and E3 continues operation for some time, and the slag on its strainer is thoroughly discharged.Before E3 stops, the anti-washing unit of open system.
The 5th is the anti-wash phase of system.Finish rear anti-washing unit by circuit and sequence control system open system in the blowback deslagging stage.Closing switch valve V1, V2, V3, V5, V6 close pump P1 and air compressor E2, open scavenging pump P3 and two cleaning valve V7, V8.Clear liquor in the clear liquid groove T4 is divided into two-way under the effect of scavenging pump P3, one tunnel process microfiltration membrane tank body cleaning valve V7 flows to the microfiltration membrane tank body, and another road is arranged the operating strainer of nozzle cleaning belt filtering units through strainer cleaning valve V8 by two.Adopt pulse mode to open back-flushing valve V5 after filling clear liquor in the microfiltration membrane tank body, clean the microfiltration membrane pipe, the liquid after the cleaning enters in the T2 by opening V4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102297911A CN102923873A (en) | 2011-08-08 | 2011-08-08 | Online water circulation purifying system for aluminum section surface treatment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011102297911A CN102923873A (en) | 2011-08-08 | 2011-08-08 | Online water circulation purifying system for aluminum section surface treatment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102923873A true CN102923873A (en) | 2013-02-13 |
Family
ID=47638837
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011102297911A Pending CN102923873A (en) | 2011-08-08 | 2011-08-08 | Online water circulation purifying system for aluminum section surface treatment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102923873A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106065473A (en) * | 2016-07-06 | 2016-11-02 | 陈衍旻 | Realize iron and steel parts oxidation processing technique and the system of sewage zero-discharge |
| CN108149017A (en) * | 2017-12-29 | 2018-06-12 | 佛山市三水雄鹰铝表面技术创新中心有限公司 | A kind of mould liquid that stews replaces Alkaline etchant and recycles the system and technique of aluminium hydroxide |
| CN110330135A (en) * | 2019-06-21 | 2019-10-15 | 浙江翔和环保工程有限公司 | A kind of alumilite process sealing of hole nickel-containing waste water (DF film) treatment process |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006255587A (en) * | 2005-03-17 | 2006-09-28 | Toray Ind Inc | Method for treating water |
| CN1946472A (en) * | 2004-03-10 | 2007-04-11 | 德格雷蒙公司 | Filtration membrane cleaning method and apparatus using this method |
| CN101301584A (en) * | 2008-06-13 | 2008-11-12 | 东莞市威迪膜科技有限公司 | Tube-type sewage water micro-filter processing equipment |
| CN201447405U (en) * | 2009-05-11 | 2010-05-05 | 苏存章 | Aluminum oxidation wastewater treatment and reclaimed water reuse device |
-
2011
- 2011-08-08 CN CN2011102297911A patent/CN102923873A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1946472A (en) * | 2004-03-10 | 2007-04-11 | 德格雷蒙公司 | Filtration membrane cleaning method and apparatus using this method |
| JP2006255587A (en) * | 2005-03-17 | 2006-09-28 | Toray Ind Inc | Method for treating water |
| CN101301584A (en) * | 2008-06-13 | 2008-11-12 | 东莞市威迪膜科技有限公司 | Tube-type sewage water micro-filter processing equipment |
| CN201447405U (en) * | 2009-05-11 | 2010-05-05 | 苏存章 | Aluminum oxidation wastewater treatment and reclaimed water reuse device |
Non-Patent Citations (1)
| Title |
|---|
| 王继斌等: "《环保设备选择、运行与维护》", 31 July 2007, 化学工业出版社 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106065473A (en) * | 2016-07-06 | 2016-11-02 | 陈衍旻 | Realize iron and steel parts oxidation processing technique and the system of sewage zero-discharge |
| CN106065473B (en) * | 2016-07-06 | 2019-03-26 | 陈衍旻 | Realize the iron and steel parts oxidation processing technique and system of sewage zero-discharge |
| CN108149017A (en) * | 2017-12-29 | 2018-06-12 | 佛山市三水雄鹰铝表面技术创新中心有限公司 | A kind of mould liquid that stews replaces Alkaline etchant and recycles the system and technique of aluminium hydroxide |
| CN110330135A (en) * | 2019-06-21 | 2019-10-15 | 浙江翔和环保工程有限公司 | A kind of alumilite process sealing of hole nickel-containing waste water (DF film) treatment process |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102603097B (en) | Advanced treatment and recycling process for wastewater containing heavy metal ions | |
| CN101239769B (en) | Leather-making waste water reusing treatment method | |
| CN101648757A (en) | Recycling processing method for stainless steel processing process wastewater grading precipitation | |
| CN104176857B (en) | The treatment process of Mn-bearing waste water in wet method electrolysis manganese production process | |
| CN202220201U (en) | On-line water circulating and purifying device used in surface treatment process of fluorine-free, ammonia-free and four-in-one aluminum profile | |
| CN101648759A (en) | Recycling processing method for wastewater produced by processing stainless steel | |
| CN102372354A (en) | Taxonomic treatment and circular utilization method of electroplating waste water | |
| CN104355365A (en) | Chromium-containing wastewater treatment method capable of realizing zero emission of pollutants | |
| CN103073123A (en) | Metal plating wastewater recycle using and recycling technology process | |
| CN101219838A (en) | Method for processing heavy metal industrial waste water with low concentration | |
| CN205603386U (en) | Strong brine zero release membrane concentrator | |
| CN102161548A (en) | Method for recycling and treating electroplating wastewater and equipment thereof | |
| CN105859005A (en) | Method and system for treating stainless steel cold-rolling and pickling waste acid | |
| CN100588626C (en) | Heavy metal waste water continuous treating method and treating device thereof | |
| CN111170524A (en) | Reverse osmosis concentrated water recycling method | |
| CN111453891A (en) | Evaporation concentration recycling zero discharge system for phosphating wastewater treatment | |
| CN104445720A (en) | Pickling waste liquid treatment process of steel industry | |
| CN201512599U (en) | Equipment for recovering metallic copper or nickel from electroplating rinse water | |
| CN101148280A (en) | Purifying and reclaiming method for alkali waste water based on film technique | |
| CN102923873A (en) | Online water circulation purifying system for aluminum section surface treatment | |
| CN201610402U (en) | Recycling and deep treatment device for electronic electroplating wastewater | |
| CN111704302A (en) | Electroplating wastewater zero-discharge treatment method and equipment thereof | |
| CN201686593U (en) | Acid and alkaline wastewater cycle disposal system | |
| CN201999826U (en) | Recycle treatment equipments for electroplating wastewater | |
| CN100400427C (en) | Process of treating and utilizing acid waste water containing heavy metal |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130213 |