CN101041538A - Method for treating and reclaiming wastewater of polyester piece goods dyeing and finishing - Google Patents
Method for treating and reclaiming wastewater of polyester piece goods dyeing and finishing Download PDFInfo
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- CN101041538A CN101041538A CN 200710067593 CN200710067593A CN101041538A CN 101041538 A CN101041538 A CN 101041538A CN 200710067593 CN200710067593 CN 200710067593 CN 200710067593 A CN200710067593 A CN 200710067593A CN 101041538 A CN101041538 A CN 101041538A
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Abstract
The invention discloses a disposing and recycling method of polyester piece goods dyeing and finishing waste water, which comprises the following steps: leading polyester piece goods dyeing and finishing waste water through three-body recombined inorganic macromolecule flocculant and nature macromolecule recombined flocculant; proceeding co-flocculate treatment; combining biological treatment and ozone germicidal treatment through filtering technology; getting intermediate water and clean water; mixing; recycling to polyester piece goods dyeing and finishing course selectively. This method can remove colourity and CODcr value of printing and dyeing wastewater swiftly and does not influence quality of fabric.
Description
Technical field
The present invention relates to a kind of chemical fibre dyeing and finishing process dyeing and finishing wastewater that is used for and handle and recycling method, especially a kind of polyester piece good dyeing and finishing wastewater that is used for is handled and recycling method.
Background technology
The textile dyeing and finishing industry is one of bigger department of discharging amount of industrial wastewater, and the annual waste discharge of China billion cubic meter more than 12 occupies the discharged volume of industrial waste water prostatitis.And dyeing and finishing wastewater has characteristics such as colourity is dark, decolouring is difficult, and complicated component is changeable, contains organic substrate concentration height, and the COD value is big, the often a sheet of waters of a tame dyeing and finishing enterprise pollution.The repeating utilization factor of China's dyeing and finishing wastewater is very low at present, and average repeating utilization factor is lower than 10%.
At present, the processing reuse technology of dyeing and finishing wastewater mainly comprises biologic treating technique, physical treatment technology, chemistry and electrochemical treatment technology etc.Biotechnology is used for the history in existing eight, 90 years of all kinds of sewage disposals, along with widespread use in the industry growth and technical continuous innovation improve, has occurred adapting to the technical process of multiple condition.But biotechnology is handled waste water, be well prerequisite with the wastewater biological degradability.Development along with chemical industry, dyestuffs industries, and the human consumer is to the raising of dyeing and finishing processing request, the organism of difficult for biological degradation such as a large amount of novel dyeing and finishing auxiliary agents, dyestuff, finishing composition, slurry is widely adopted in dyeing and finishing industry, it is changeable to cause the dyeing and finishing wastewater composition to become increasingly complex, the biodegradability of dyeing and finishing wastewater becomes worse and worse, thereby the limitation of traditional biochemical technology processing dyeing and finishing wastewater is obvious day by day.
Since the last century the nineties, domestic part dyeing and finishing factory utilizes method combined treatment dyeing and finishing wastewaters such as biological process, flocculence, charcoal absorption, Zeo-karb, in the hope of realizing the part reuse of dyeing and finishing wastewater.As adopt activated sludge process, immobilization decolouring bacterium/activated sludge process, and A/O method processing dyeing and finishing wastewater, in order to realize the reuse of dyeing and finishing wastewater part.But technical process is long in these treatment technologies, floor space is big, and disposable input is many, and running cost is higher, not too is suitable for regional dispersive medium-sized and small enterprises.Photochemical catalysis decolouring dyeing and finishing wastewater has also been obtained big progress, to improving the dyeing and finishing wastewater reclamation rate certain promotion is arranged, but this type of technology needs specific installation, and current consumption is big, and efficient is low, is not suitable for the situation of larger process amount.Also have the PACS of employing flocculation agent coagulation/sand filtration abbreviated system and one-level coagulation/cinder filtration method to handle and disperse the class dyeing and finishing wastewater, but this type of technology applicable surface is narrower, shows big limitation.
The physical treatment technology has obtained studying preferably and using as a kind of treatment technology of trade effluents such as dyeing and finishing wastewater, and it mainly contains absorption, chemical flocculation etc.With flocculation and filtration or air flotation technology combination, can remove colourity and CODcr value in the dyeing and finishing wastewater fast, and treatment scheme is short, cost is low, and effect is obvious.But present most of flocculation agent is to CODcr value clearance in the dyeing and finishing wastewater not high (generally only being about 40-60%), thereby to high density, high chroma, high CODcr value dyeing and finishing wastewater purifying treatment, often do not reach ideal effect, and go out water unstable, can not be used for reuse.
Cause the lower Another reason of present dyeing and finishing wastewater reclamation rate to be, dyeing and finishing is processed different operations requirements in water quality is had bigger difference, and people are to quality in how controlling, which dyeing and finishing manufacturing procedure the middle water that obtains can be used for, and does not influence the necessary research of aspects such as quality shortage of dyeing and finishing product.
Summary of the invention
Technical problem to be solved by this invention is to overcome the lower deficiency of dyeing and finishing wastewater reclamation rate in the prior art, and provides the high polyester piece good dyeing and finishing wastewater that is used for of a kind of deep purifying, reclamation rate to handle and recycling method.
The present invention solves the problems of the technologies described above used technical scheme: this polyester piece good dyeing and finishing wastewater is handled and recycling method, and its method characteristics are to comprise the steps:
(1) the polyester piece good dyeing and finishing wastewater enters high-order equalizing tank, carries out monitoring of pH value and adjusting automatically;
(2) regulate pH value polyester piece good dyeing and finishing wastewater afterwards and enter flocculation sedimentation tank, through the composite flocculation agent decolorizing purification, the mud of separating enters sludge thickener, and remainder enters biological treatment tank;
(3) remainder that in biological treatment tank step (2) is obtained is carried out a biological disposal upon, and through separating after the precipitation, mud enters sludge thickener, and residue waste water carries out air supporting or filtration;
(4) carry out ozone sterilization through air supporting or filtering residue waste water, obtain middle water;
(5) control of water reuse automatic control system in the process, qualified middle water enters middle pond, be used to the daily water consumption of polyester piece good dyeing and finishing manufacturing procedure or enterprise, perhaps middle water mixes with clear water, and mixing water is used to the daily water consumption of polyester piece good dyeing and finishing manufacturing procedure or enterprise.
Composite flocculation agent of the present invention comprises ternary compound inorganic high molecular flocculant and natural polymer composite flocculation agent.
Ternary compound inorganic high molecular flocculant of the present invention is one or more mixtures in Al (III)/Fe (II)/Mg (II) composite inorganic flocculation agent, Al (III)/Fe (II)/Ca (II) composite inorganic flocculation agent, Al (III)/Mg (II)/Ca (II) the composite inorganic flocculation agent, and described natural polymer composite flocculation agent is the mixture of chitosan and chitin modified product.
Chitin modified product of the present invention is one or more mixtures in acrylic amide graft copolymerization chitosan, dimethyl diallyl ammonium chloride graft copolymerization chitosan, the dihydroxypropyl trimethyl ammonium chloride chitosan.
Of the present invention in water reuse automatic control system according to polyester piece good dyeing and finishing manufacturing procedure to requirements in water quality, and the water quality situation of existing middle water, the switch and the flow of water valve and purge valve in controlling respectively, so that middle water or the mixing water that meets polyester piece good dyeing and finishing manufacturing procedure water water quality requirement or meet enterprise's daily water consumption water quality requirement to be provided, mixing water is carried out water quality detection, and with detected result feed back in water reuse automatic control system, middle water reuse automatic control system centering water valve or purge valve are adjusted.
Precipitation of the present invention was divided into for two steps, and the polyester piece good dyeing and finishing wastewater at first carries out the precipitation first time in second pond, and the mud that precipitates is back to biological treatment tank; The upper water that precipitates for the first time gained enters three heavy ponds and proceeds precipitation for the second time, and carries out pH value and COD monitoring by automatic checkout system, and the mud that separate in three heavy ponds enters sludge thickener, and residue waste water carries out air supporting or filtration.
Polyester piece good dyeing and finishing manufacturing procedure of the present invention is one or more in concise operation, washing step, alkali decrement operation, the refrigerating work procedure.
The present invention compared with prior art has the following advantages: (1) is at the characteristics of the dyeing and finishing wastewater of polyester piece good dyeing and finishing processing enterprise, by ternary compound inorganic high molecular flocculant and the collaborative flocculation treatment of natural polymer composite flocculation agent, passing through filtering technique, and, obtain high-quality middle water in conjunction with biological treatment and ozone sterilization processing.(2) centering water carries out ozone sterilization, in preventing in the water use owing to the existence of microorganism cause smelly, avoid influence to environment and quality product.(3) quality of water is processed the ratio of different operations to water and clear water in the automatic adjusting of requirements in water quality with dyeing and finishing in the middle water reuse automatic control system basis, do not influencing under the dyeing and finishing product quality premise, improved middle water reclamation rate greatly, the reuse ratio reaches more than 50%.
Description of drawings
Fig. 1 is an embodiment of the invention method flow diagram.
Fig. 2 is a water reuse schema in the embodiment of the invention.
Fig. 3 is a water reuse automatic control system schema in the embodiment of the invention.
Embodiment
Embodiment 1
Referring to Fig. 1, Fig. 2, the polyester piece good dyeing and finishing wastewater enters high-order equalizing tank, carries out the monitoring of pH value, uses Al
2CL
3Reagent is adjusted to dyeing and finishing wastewater pH value smaller or equal to 8.Dyeing and finishing wastewater after regulating enters flocculation sedimentation tank and carries out decolorizing purification, add the ternary compound inorganic high molecular flocculant: Al (III)/Fe (II)/Mg (II) composite inorganic flocculation agent 100mg/l, natural polymer composite flocculation agent: chitosan and acrylic amide graft copolymerization chitosan compound 50mg/l, the ternary compound inorganic high molecular flocculant is used for removing the dispersed dye of dyeing and finishing wastewater, and the natural polymer composite flocculation agent is used for removing the active substance of dyeing and finishing wastewater.Dyeing and finishing wastewater behind the decolorizing purification separates, and the mud of separating enters sludge thickener, and the dyeing and finishing wastewater after the separation enters biological treatment tank.Dyeing and finishing wastewater after the biological treatment enters second pond and carries out the precipitation first time, and the mud that precipitates is back to biological treatment tank, and the upper water that precipitates enters three heavy ponds and carries out the precipitation second time, and the mud that precipitates enters sludge thickener.In three heavy ponds, pH value and COD are monitored by automatic checkout system, carry out air supporting or filtration then, again through ozone sterilization, remove the microorganism in anhydrating, obtain middle water, the middle water water quality of this moment is pH value 6.8, SS (mg/l) 135, total solids (mg/l) 180,22 times of colourities, CODcr (mg/l) 116.With middle water water quality and each dyeing and finishing manufacturing procedure and enterprise's daily water consumption to water reuse automatic control system in the requirements in water quality input, wherein concise water water quality requirement: pH value 7-8, colourity＜10 times, CODcr＜100 (mg/l); Washing water water quality requirement: pH value 6-8, colourity＜20 times, CODcr＜100 (mg/l); Alkali decrement water water quality requirement: pH value 7-8, colourity＜20 times, CODcr＜100 (mg/l); Cooling water water quality requirement: pH value 6-8, colourity＜30 times, CODcr＜150 (mg/l); Enterprise's daily water consumption is to water quality requirement: pH value 7-8, colourity＜30 times, CODcr＜180 (mg/l).In water reuse automatic control system according to polyester piece good dyeing and finishing manufacturing procedure to requirements in water quality, and the water quality situation of existing middle water, the switch and the flow of water valve and purge valve in controlling respectively, so that middle water or the mixing water that meets polyester piece good dyeing and finishing manufacturing procedure water water quality requirement or meet enterprise's daily water consumption water quality requirement to be provided, mixing water is carried out water quality detection, and with detected result feed back in water reuse automatic control system, middle water reuse automatic control system centering water valve or purge valve are adjusted.That the water that meets the requirement of polyester piece good dyeing and finishing manufacturing procedure water is used to is concise, washing, alkali decrement and refrigerating work procedure.Mud in the sludge thickener carries out transporting outward landfill after the processed.The middle concrete control process of water reuse automatic control system is as follows: referring to Fig. 3, input dyeing and finishing manufacturing procedure title during beginning, water valve in the unlatching, middle water reuse automatic control system detects water quality, if water quality has met the dyeing and finishing manufacturing procedure water requirement of being imported, whether then detect purge valve opens, that has opened closes purge valve, and water reuse automatic control system detects water quality once more in after delaying time 1 minute, repeat above-mentioned steps then, purge valve is not opened, and then middle water reuse automatic control system detects water quality once more, repeats above-mentioned steps then; If water quality does not meet the dyeing and finishing manufacturing procedure water requirement of being imported, whether then detect purge valve opens, the unlatching purge valve that does not have unlatching, and water reuse automatic control system detects water quality once more in after delaying time 1 minute, repeat above-mentioned steps, purge valve has been opened, and then middle water reuse automatic control system detects water quality once more, repeats above-mentioned steps.
Embodiment 2
Referring to Fig. 1, Fig. 2, Fig. 3, the polyester piece good dyeing and finishing wastewater enters high-order equalizing tank, carries out the monitoring of pH value, uses Al
2CL
3Reagent is adjusted to dyeing and finishing wastewater pH value smaller or equal to 8.Dyeing and finishing wastewater after regulating enters flocculation sedimentation tank and carries out decolorizing purification, add the ternary compound inorganic high molecular flocculant: Al (III)/Fe (II)/Ca (II) composite inorganic flocculation agent 120mg/l, natural polymer composite flocculation agent: chitosan and dimethyl diallyl ammonium chloride graft copolymerization chitosan compound 50mg/l, the ternary compound inorganic high molecular flocculant is used for removing the dispersed dye of dyeing and finishing wastewater, and the natural polymer composite flocculation agent is used for removing the active substance of dyeing and finishing wastewater.Dyeing and finishing wastewater behind the decolorizing purification separates, and the mud of separating enters sludge thickener, and the dyeing and finishing wastewater after the separation enters biological treatment tank.Dyeing and finishing wastewater after the biological treatment enters second pond and carries out the precipitation first time, and the mud that precipitates is back to biological treatment tank, and the upper water that precipitates enters three heavy ponds and carries out the precipitation second time, and the mud that precipitates enters sludge thickener.In three heavy ponds, pH value and COD are monitored by automatic checkout system, carry out air supporting or filtration then, again through ozone sterilization, remove the microorganism in anhydrating, obtain middle water, the middle water water quality of this moment is pH value 7.3, SS (mg/l) 120, total solids (mg/l) 168,23 times of colourities, CODcr (mg/l) 108.The middle hydromining that will meet the water requirement by middle water reuse automatic control system is linked into the polyester piece good dyeing and finishing manufacturing procedure lower to water quality requirement with independent pipeline, perhaps with middle water be linked into the printing and dyeing manufacturing procedure higher after clear water mixes to water quality requirement, detailed process is as follows: at first with middle water water quality and each dyeing and finishing manufacturing procedure and other water approach to water reuse automatic control system in the requirements in water quality input, wherein concise water water quality requirement: pH value 7-8, colourity＜10 times, CODcr＜100 (mg/l); Washing water water quality requirement: pH value 6-8, colourity＜20 times, CODcr＜100 (mg/l); Alkali decrement water water quality requirement: pH value 7-8, colourity＜20 times, CODcr＜100 (mg/l); Cooling water water quality requirement: pH value 6-8, colourity＜30 times, CODcr＜150 (mg/l); Enterprise's daily water consumption is to water quality requirement: pH value 7-8, colourity＜30 times, CODcr＜180 (mg/l).Water valve in opening then, input dyeing and finishing manufacturing procedure title during water, whether middle water reuse automatic control system detects water quality, if water quality has met the dyeing and finishing manufacturing procedure water requirement of being imported, then detect purge valve and open, that has opened closes purge valve, and water reuse automatic control system detects water quality once more in after delaying time 1 minute, repeats above-mentioned steps then, and purge valve is not opened, then middle water reuse automatic control system detects water quality once more, repeats above-mentioned steps then; If water quality does not meet the dyeing and finishing manufacturing procedure water requirement of being imported, whether then detect purge valve opens, the unlatching purge valve that does not have unlatching, and water reuse automatic control system detects water quality once more in after delaying time 1 minute, repeat above-mentioned steps, purge valve has been opened, and then middle water reuse automatic control system detects water quality once more, repeats above-mentioned steps.That the water that meets the requirement of polyester piece good dyeing and finishing manufacturing procedure water is used to is concise, washing, alkali decrement and refrigerating work procedure.Mud in the sludge thickener carries out transporting outward landfill after the processed.
Embodiment 3
Referring to Fig. 1, Fig. 2, Fig. 3, the polyester piece good dyeing and finishing wastewater enters high-order equalizing tank, carries out the monitoring of pH value, uses Al
2CL
3Reagent is adjusted to dyeing and finishing wastewater pH value smaller or equal to 8.Dyeing and finishing wastewater after regulating enters flocculation sedimentation tank and carries out decolorizing purification, add the ternary compound inorganic high molecular flocculant: Al (III)/Mg (II)/Ca (II) composite inorganic flocculation agent 100mg/l, natural polymer composite flocculation agent: chitosan and dihydroxypropyl trimethyl ammonium chloride chitosan compound 60mg/l.The ternary compound inorganic high molecular flocculant is used for removing the dispersed dye of dyeing and finishing wastewater, and the natural polymer composite flocculation agent is used for removing the active substance of dyeing and finishing wastewater.Dyeing and finishing wastewater behind the decolorizing purification separates, and the mud of separating enters sludge thickener, and the dyeing and finishing wastewater after the separation enters biological treatment tank.Dyeing and finishing wastewater after the biological treatment enters second pond and carries out the precipitation first time, and the mud that precipitates is back to biological treatment tank, and the upper water that precipitates enters three heavy ponds and carries out the precipitation second time, and the mud that precipitates enters sludge thickener.In three heavy ponds, pH value and COD are monitored by automatic checkout system, carry out air supporting or filtration then, again through ozone sterilization, remove the microorganism in anhydrating, obtain middle water, the middle water water quality of this moment is PH7.1, SS (mg/l) 122, total solids (mg/l) 159,24 times of colourities, CODcr (mg/l) 107.The middle hydromining that will meet the water requirement by middle water reuse automatic control system is linked into the polyester piece good dyeing and finishing manufacturing procedure lower to water quality requirement with independent pipeline, perhaps with middle water be linked into the polyester piece good dyeing and finishing manufacturing procedure higher after clear water mixes to water quality requirement, detailed process is as follows: at first with middle water water quality and each dyeing and finishing manufacturing procedure and other water approach to water reuse automatic control system in the requirements in water quality input, wherein concise water water quality requirement: pH value 7-8, colourity＜10 times, CODcr＜100 (mg/l); Washing water water quality requirement: pH value 6-8, colourity＜20 times, CODcr＜100 (mg/l); Alkali decrement water water quality requirement: pH value 7-8, colourity＜20 times, CODcr＜100 (mg/l); Cooling water water quality requirement: pH value 6-8, colourity＜30 times, CODcr＜150 (mg/l); Enterprise's daily water consumption is to water quality requirement: pH value 7-8, colourity＜30 times, CODcr＜180 (mg/l).Water valve in opening then, input dyeing and finishing manufacturing procedure title during water, whether middle water reuse automatic control system detects water quality, if water quality has met the dyeing and finishing manufacturing procedure water requirement of being imported, then detect purge valve and open, that has opened closes purge valve, and water reuse automatic control system detects water quality once more in after delaying time 1 minute, repeats above-mentioned steps then, and purge valve is not opened, then middle water reuse automatic control system detects water quality once more, repeats above-mentioned steps; If water quality does not meet the dyeing and finishing manufacturing procedure water requirement of being imported, whether then detect purge valve opens, the unlatching purge valve that does not have unlatching, and water reuse automatic control system detects water quality once more in after delaying time 1 minute, repeat above-mentioned steps then, purge valve has been opened, and then middle water reuse automatic control system detects water quality once more, repeats above-mentioned steps.That the water that meets the requirement of polyester piece good dyeing and finishing manufacturing procedure water is used to is concise, washing, alkali decrement and refrigerating work procedure.Mud in the sludge thickener carries out transporting outward landfill after the processed.
Embodiment 4
Referring to Fig. 1, Fig. 2, Fig. 3, the polyester piece good dyeing and finishing wastewater enters high-order equalizing tank, carries out the monitoring of pH value, uses Al
2CL
3Reagent is adjusted to dyeing and finishing wastewater pH value smaller or equal to 8.Dyeing and finishing wastewater after regulating enters flocculation sedimentation tank and carries out decolorizing purification, add the ternary compound inorganic high molecular flocculant: Al (III)/Fe (II)/Mg (II) composite inorganic flocculation agent 50mg/l, Al (III)/Mg (II)/Ca (II) composite inorganic flocculation agent 40mg/l, natural polymer composite flocculation agent: chitosan, acrylic amide graft copolymerization chitosan and dihydroxypropyl trimethyl ammonium chloride chitosan compound 60mg/l.The ternary compound inorganic high molecular flocculant is used for removing the dispersed dye of dyeing and finishing wastewater, the natural polymer composite flocculation agent is used for removing the active substance of dyeing and finishing wastewater, dyeing and finishing wastewater behind the decolorizing purification separates, the mud of separating enters sludge thickener, and the dyeing and finishing wastewater after the separation enters biological treatment tank.Dyeing and finishing wastewater after the biological treatment enters second pond and carries out the precipitation first time, and the mud that precipitates is back to biological treatment tank, and the upper water that precipitates enters three heavy ponds and carries out the precipitation second time, and the mud that precipitates enters sludge thickener.In three heavy ponds, pH value and COD are monitored by automatic checkout system, carry out air supporting or filtration then, again through ozone sterilization, remove the microorganism in anhydrating, obtain middle water, the middle water water quality of this moment is pH value 6.8, SS (mg/l) 113, total solids (mg/l) 147,18 times of colourities, CODcr (mg/l) 89.The middle hydromining that will meet the water requirement by middle water reuse automatic control system is linked into the polyester piece good dyeing and finishing manufacturing procedure lower to water quality requirement with independent pipeline, perhaps with middle water be linked into the polyester piece good dyeing and finishing manufacturing procedure higher after clear water mixes to water quality requirement, detailed process is as follows: at first with middle water water quality and each dyeing and finishing manufacturing procedure and other water approach to water reuse automatic control system in the requirements in water quality input, wherein concise water water quality requirement: pH value 7-8, colourity＜10 times, CODcr＜100 (mg/l); Washing water water quality requirement: pH value 6-8, colourity＜20 times, CODcr＜100 (mg/l); Alkali decrement water water quality requirement: pH value 7-8, colourity＜20 times, CODcr＜100 (mg/l); Cooling water water quality requirement: pH value 6-8, colourity＜30 times, CODcr＜150 (mg/l); Enterprise's daily water consumption is to water quality requirement: pH value 7-8, colourity＜30 times, CODcr＜180 (mg/l).Water valve in opening then, input dyeing and finishing manufacturing procedure title during water, whether middle water reuse automatic control system detects water quality, if water quality has met the dyeing and finishing manufacturing procedure water requirement of being imported, then detect purge valve and open, that has opened closes purge valve, and water reuse automatic control system detects water quality once more in after delaying time 1 minute, repeats above-mentioned steps, and purge valve is not opened, then middle water reuse automatic control system detects water quality once more, repeats above-mentioned steps; If water quality does not meet the dyeing and finishing manufacturing procedure water requirement of being imported, whether then detect purge valve opens, the unlatching purge valve that does not have unlatching, and water reuse automatic control system detects water quality once more in after delaying time 1 minute, repeat above-mentioned steps, purge valve has been opened, and then middle water reuse automatic control system detects water quality once more, repeats above-mentioned steps.That the water that meets the requirement of polyester piece good dyeing and finishing manufacturing procedure water is used to is concise, washing, alkali decrement and refrigerating work procedure.Mud in the sludge thickener carries out transporting outward landfill after the processed.
Embodiment 5
Referring to Fig. 1, Fig. 2, Fig. 3, the polyester piece good dyeing and finishing wastewater enters high-order equalizing tank, carries out the monitoring of pH value, uses Al
2CL
3Reagent is adjusted to dyeing and finishing wastewater pH value smaller or equal to 8.Dyeing and finishing wastewater after regulating enters flocculation sedimentation tank and carries out decolorizing purification, add the ternary compound inorganic high molecular flocculant: Al (III)/Fe (II)/Mg (II) composite inorganic flocculation agent 20mg/l, Al (III)/Fe (II)/Ca (II) composite inorganic flocculation agent 40mg/l, Al (III)/Mg (II)/Ca (II) composite inorganic flocculation agent 30mg/l, natural polymer composite flocculation agent: the mixture 50mg/l of chitosan, acrylic amide graft copolymerization chitosan, dimethyl diallyl ammonium chloride graft copolymerization chitosan and dihydroxypropyl trimethyl ammonium chloride chitosan.The ternary compound inorganic high molecular flocculant is used for removing the dispersed dye of dyeing and finishing wastewater, the natural polymer composite flocculation agent is used for removing the active substance of dyeing and finishing wastewater, dyeing and finishing wastewater behind the decolorizing purification separates, the mud of separating enters sludge thickener, and the dyeing and finishing wastewater after the separation enters biological treatment tank.Dyeing and finishing wastewater after the biological treatment enters second pond and carries out the precipitation first time, and the mud that precipitates is back to biological treatment tank, and the upper water that precipitates enters three heavy ponds and carries out the precipitation second time, and the mud that precipitates enters sludge thickener.In three heavy ponds, pH value and COD are monitored by automatic checkout system, carry out air supporting or filtration then, again through ozone sterilization, remove the microorganism in anhydrating, obtain middle water, the middle water water quality of this moment is pH value 6.8, SS (mg/l) 110, total solids (mg/l) 143,20 times of colourities, CODcr (mg/l) 91.The middle hydromining that will meet the water requirement by middle water reuse automatic control system is linked into the polyester piece good dyeing and finishing manufacturing procedure lower to water quality requirement with independent pipeline, perhaps with middle water be linked into the polyester piece good dyeing and finishing manufacturing procedure higher after clear water mixes to water quality requirement, detailed process is as follows: at first with middle water water quality and each dyeing and finishing manufacturing procedure and other water approach to water reuse automatic control system in the requirements in water quality input, wherein concise water water quality requirement: pH value 7-8, colourity＜10 times, CODcr＜100 (mg/l); Washing water water quality requirement: pH value 6-8, colourity＜20 times, CODcr＜100 (mg/l); Alkali decrement water water quality requirement: pH value 7-8, colourity＜20 times, CODcr＜100 (mg/l); Cooling water water quality requirement: pH value 6-8, colourity＜30 times, CODcr＜150 (mg/l); Enterprise's daily water consumption is to water quality requirement: pH value 7-8, colourity＜30 times, CODcr＜180 (mg/l).Water valve in opening then, input dyeing and finishing manufacturing procedure title during water, whether middle water reuse automatic control system detects water quality, if water quality has met the dyeing and finishing manufacturing procedure water requirement of being imported, then detect purge valve and open, that has opened closes purge valve, and water reuse automatic control system detects water quality once more in after delaying time 1 minute, repeats above-mentioned steps, and purge valve is not opened, then middle water reuse automatic control system detects water quality once more, repeats above-mentioned steps; If water quality does not meet the dyeing and finishing manufacturing procedure water requirement of being imported, whether then detect purge valve opens, the unlatching purge valve that does not have unlatching, and water reuse automatic control system detects water quality once more in after delaying time 1 minute, repeat above-mentioned steps, purge valve has been opened, and then middle water reuse automatic control system detects water quality once more, repeats above-mentioned steps.That the water that meets the requirement of polyester piece good dyeing and finishing manufacturing procedure water is used to is concise, washing, alkali decrement and refrigerating work procedure.Mud in the sludge thickener carries out transporting outward landfill after the processed.
Ternary compound inorganic high molecular flocculant of the present invention: Al (III)/Fe (II)/Mg (II) composite inorganic flocculation agent, Al (III)/Fe (II)/Ca (II) composite inorganic flocculation agent and Al (III)/Mg (II)/Ca (II) composite inorganic flocculation agent, what Roman number was represented in the bracket is this ionic valence state, be that above-mentioned three kinds of ternary compound inorganic high molecular flocculants are respectively: contain trivalent aluminium ion, the composite inorganic flocculation agent of ferrous ion and divalence magnesium ion, contain trivalent aluminium ion, ferrous ion and divalent calcium ionic composite inorganic flocculation agent contain trivalent aluminium ion, divalence magnesium ion and divalent calcium ionic composite inorganic flocculation agent.
Claims (7)
1, a kind of polyester piece good dyeing and finishing wastewater is handled and recycling method, it is characterized in that, comprises the steps:
(1) the polyester piece good dyeing and finishing wastewater enters high-order equalizing tank, carries out monitoring of pH value and adjusting automatically;
(2) regulate pH value polyester piece good dyeing and finishing wastewater afterwards and enter flocculation sedimentation tank, through the composite flocculation agent decolorizing purification, the mud of separating enters sludge thickener, and remainder enters biological treatment tank;
(3) remainder that in biological treatment tank step (2) is obtained is carried out a biological disposal upon, and through separating after the precipitation, mud enters sludge thickener, and residue waste water carries out air supporting or filtration;
(4) carry out ozone sterilization through air supporting or filtering residue waste water, obtain middle water;
(5) control of water reuse automatic control system in the process, qualified middle water enters middle pond, be used to the daily water consumption of polyester piece good dyeing and finishing manufacturing procedure or enterprise, perhaps middle water mixes with clear water, and mixing water is used to the daily water consumption of polyester piece good dyeing and finishing manufacturing procedure or enterprise.
2, polyester piece good dyeing and finishing wastewater according to claim 1 is handled and recycling method, and it is characterized in that: described composite flocculation agent comprises ternary compound inorganic high molecular flocculant and natural polymer composite flocculation agent.
3, polyester piece good dyeing and finishing wastewater according to claim 2 is handled and recycling method, it is characterized in that: described ternary compound inorganic high molecular flocculant is one or more mixtures in Al (III)/Fe (II)/Mg (II) composite inorganic flocculation agent, Al (III)/Fe (II)/Ca (II) composite inorganic flocculation agent, Al (III)/Mg (II)/Ca (II) the composite inorganic flocculation agent, and described natural polymer composite flocculation agent is the mixture of chitosan and chitin modified product.
4, polyester piece good dyeing and finishing wastewater according to claim 3 is handled and recycling method, and it is characterized in that: described chitin modified product is one or more mixtures in acrylic amide graft copolymerization chitosan, dimethyl diallyl ammonium chloride graft copolymerization chitosan, the dihydroxypropyl trimethyl ammonium chloride chitosan.
5, polyester piece good dyeing and finishing wastewater according to claim 1 is handled and recycling method, it is characterized in that: described in water reuse automatic control system according to polyester piece good dyeing and finishing manufacturing procedure to requirements in water quality, and the water quality situation of existing middle water, the switch and the flow of water valve and purge valve in controlling respectively, so that middle water or the mixing water that meets polyester piece good dyeing and finishing manufacturing procedure water water quality requirement or meet enterprise's daily water consumption water quality requirement to be provided, mixing water is carried out water quality detection, and with detected result feed back in water reuse automatic control system, middle water reuse automatic control system centering water valve or purge valve are adjusted.
6, polyester piece good dyeing and finishing wastewater according to claim 1 is handled and recycling method, it is characterized in that: described precipitation was divided into for two steps, the polyester piece good dyeing and finishing wastewater at first carries out the precipitation first time in second pond, the mud that precipitates is back to biological treatment tank; The upper water that precipitates for the first time gained enters three heavy ponds and proceeds precipitation for the second time, and carries out pH value and COD monitoring by automatic checkout system, and the mud that separate in three heavy ponds enters sludge thickener, and residue waste water carries out air supporting or filtration.
7, polyester piece good dyeing and finishing wastewater according to claim 1 is handled and recycling method, and it is characterized in that: described polyester piece good dyeing and finishing manufacturing procedure is one or more in concise operation, washing step, alkali decrement operation, the refrigerating work procedure.
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| CNB2007100675933A CN100460348C (en) | 2007-03-16 | 2007-03-16 | Method for treating and reclaiming wastewater of polyester piece goods dyeing and finishing |
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| CNB2007100675933A CN100460348C (en) | 2007-03-16 | 2007-03-16 | Method for treating and reclaiming wastewater of polyester piece goods dyeing and finishing |
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| CN104310558A (en) * | 2014-09-25 | 2015-01-28 | 青岛佰众化工技术有限公司 | Industrial wastewater flocculating agent |
| CN104478174A (en) * | 2014-12-19 | 2015-04-01 | 新疆环境工程技术有限责任公司 | High-salt-content dyeing wastewater treatment recovery zero discharge integration method |
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| CN107620205A (en) * | 2017-11-02 | 2018-01-23 | 上海金堂轻纺新材料科技有限公司 | A kind of fabric pretreatment waste water circulation process of reusing |
| CN108689559A (en) * | 2018-08-22 | 2018-10-23 | 湖州裕帛纺织有限公司 | The processing method of dyeing and printing sewage |
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| CN1078184C (en) * | 1997-07-30 | 2002-01-23 | 上海师范大学 | Alkali decrement process for waste water processing |
| CN1257064A (en) * | 1999-12-16 | 2000-06-21 | 陈定良 | Process for recovering terephthalic acid from alkali reduced sewage |
| CN1569694A (en) * | 2003-07-18 | 2005-01-26 | 东莞市天虹环保工程有限公司 | Deep purification and reclaiming device and method for dyeing waste water |
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| CN104478174A (en) * | 2014-12-19 | 2015-04-01 | 新疆环境工程技术有限责任公司 | High-salt-content dyeing wastewater treatment recovery zero discharge integration method |
| CN104478174B (en) * | 2014-12-19 | 2016-06-29 | 新疆环境工程技术有限责任公司 | High saliferous treatment of dyeing wastewater reuse zero-emission integrated approach |
| CN106237998A (en) * | 2016-07-28 | 2016-12-21 | 东华大学 | A kind of al deposition chitosan non-woven fabrics adsorbent and preparation thereof and application |
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| CN108689559A (en) * | 2018-08-22 | 2018-10-23 | 湖州裕帛纺织有限公司 | The processing method of dyeing and printing sewage |
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