CN1765760A - Terephthalic acid production waste water disposal method - Google Patents
Terephthalic acid production waste water disposal method Download PDFInfo
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- CN1765760A CN1765760A CN 200410086297 CN200410086297A CN1765760A CN 1765760 A CN1765760 A CN 1765760A CN 200410086297 CN200410086297 CN 200410086297 CN 200410086297 A CN200410086297 A CN 200410086297A CN 1765760 A CN1765760 A CN 1765760A
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Abstract
The invention provides a treatment method for waste water in phthalic acid production, which comprises ultrafiltering, reverse osmosis filtering, and ion exchanging. Wherein, the seston in waste water can be removed almost fully; metal ion in the water, such as Co and Mn, and organic, such as p-carboxybenzaldehyde and benzoic acid, both can be removed more than 99%; the out water comes to the quality requiry for desalinization water. This method can realize waste water recycle with more than 70% utility.
Description
Technical field
The present invention relates to a kind of processing method of industrial waste water, refined unit produces wastewater treatment method in especially a kind of Production of Terephthalic Acid.
Background technology
Pure terephthalic acid (PTA) is a kind of important petrochemicals, and the industrial production polyester that is mainly used in is a kind of di-carboxylic acid of output maximum.Along with improving constantly of people's living standard, pure terephthalic acid's the market requirement is also enlarging year by year.
The pure terephthalic acid produces main employing p-Xylol high-temperature oxidation.In process of production, refined unit produces a large amount of refined wastewaters, and the total solids level of this waste water is that 0.4～0.6 (w) %, metal ion content are that 30～80mg/l, organic content are 1000～2000mg/l.The characteristics of refined wastewater are that the water yield is big, and composition is simple relatively.
Many now employing precipitator method, absorption method and biochemical process are handled purified terephthalic acid wastewater.Generally speaking, refined wastewater directly enters the sewage disposal unit, mainly adopts biochemical process to handle, and wastewater biochemical is handled back up to standard discharging.
Organism such as the terephthalic acid in the refined wastewater, acetate, methyl acetate are the organism of difficult for biological degradation.Adopt biochemical process directly to handle refined wastewater, exist the residence time long, floor space is big, need to add shortcoming such as dilution water.Directly carry out biochemical treatment, not only increased the working cost and the fine terephthalic acid production cost of biochemical treatment apparatus, and wasted great amount of water resources.
Membrane separation technique is rapid, the widely used water technology of development in recent years.The ultimate principle of this technology is: utilize that water molecules can see through separatory membrane in the aqueous solution, and solute and other impurity can not see through the characteristic of separatory membrane, under the effect of certain motivating force, water and solute separates the purpose that reach the separation solute, purifies water in the realization aqueous solution.Handle waste water with membrane separation technique, can realize the recycle of water.
The relative molecular weight size of holding back according to film can be divided into membrane separation technique micro-filtration (MF), ultrafiltration (UF), nanofiltration (NF), reverse osmosis (RO) and electrodialysis (ED), wherein electrodialysis with potential gradient as motivating force, other four kinds of embrane methods with pressure gradient as motivating force.
In the prior art, Chinese patent (CN1315295A) discloses a kind of treatment process of pure terephthalic acid's factory effluent, this method adopts membrane separation technique and resin absorption isolation technique bonded method to handle purification of terephthalic acid waste water, at first adopt the stainless steel ultra-filtration membrane to purify liquid waste, remove wherein solid particulate and part macromole impurity, utilize resin absorption to separate the organism of removing in the solution then.
The reuse of refined wastewater must reach the water quality requirement that production equipment normally moved, produced qualified product.The material that influences the refined wastewater reuse mainly is organism such as metal ions such as the cobalt, manganese in the waste water and p-methylbenzoic acid, and therefore, metal ion and the organism effectively removed in the waste water are the keys of wastewater treatment and reuse technology.
The treatment process of prior art, separate organism and metal ion in the removal waste water with resin absorption by ultrafiltration, after the processing, organism and metal ion content are higher in the waste water, and particularly metal ion content does not fully reach the water quality requirement of terephthalic acid process water.
Summary of the invention
In prior art, the problem of the metal ion of purification of terephthalic acid waste water and organic matter removal weak effect, the present invention adopts the treatment process of two step membrane sepn and ion-exchange, effectively remove metal ion and organism in the waste water, processed waste water fully reaches the water quality requirement of terephthalic acid process water, and the reclamation rate of waste water is higher than 70%.
A kind of Production of Terephthalic Acid wastewater treatment method provided by the invention, be characterized in: by macromole and the colloidalmaterial in the ultra-filtration process removal waste water, by organism and the metal ion in the osmosis filtration process removal waste water, further remove organism and metal ion in the waste water by ion exchange process, the waste water recycling after the processing is to the production process of terephthalic acid.A kind of Production of Terephthalic Acid wastewater treatment method of the present invention is achieved in that
The organic content of described waste water is that 1000～2000mg/l, metal ion content are that 30～80mg/l, solid suspension content are 0.4～0.6 (w) %, and this treatment process may further comprise the steps successively:
A. above-mentioned waste water is carried out the film pre-treatment, pretreatment process is ultrafiltration, obtains ultrafiltration and sees through liquid and ultrafiltration and concentration liquid;
B. ultrafiltration is seen through liquid and carry out the film processing, treatment process is an osmosis filtration, obtains reverse osmosis and sees through liquid and reverse osmosis concentrated liquid.
The organism of described waste water comprises: phenylformic acid, in carboxyl benzaldehyde, p-methylbenzoic acid, terephthalic acid, phthalic acid, m-phthalic acid, acetate, the methyl acetate one or more; The metal ion of described waste water comprises: one or more of cobalt ion, mn ion, iron ion, chromium ion, nickel ion, calcium ion, magnesium ion, titanium ion, palladium ion, cupric ion.
In the waste water that the refined unit of Production of Terephthalic Acid produces, contain multiple organism and metal ion, also contain some suspended solids, macromole and colloidalmaterial.By step a, suspended solid, macromole and colloidalmaterial are separated from waste water; By step b, organism and metal ion are separated from waste water.
When concrete enforcement is of the present invention, tubular ultra-filtration membrane is adopted in ultrafiltration, and the material of ultra-filtration membrane is a high molecular polymer, and the aperture of ultra-filtration membrane is 0.01～0.05 μ m, the water inlet pH of ultrafiltration is 6～10, and the working pressure of ultrafiltration is that 0.1～0.5MPa, service temperature are 20～50 ℃.
When concrete enforcement was of the present invention, coiled reverse osmosis membrane was adopted in reverse osmosis, and the material of reverse osmosis membrane is a high molecular polymer, and the water inlet pH of reverse osmosis is 6～10, and the working pressure of reverse osmosis is that 100～400PSi, service temperature are 20～50 ℃.
When concrete enforcement was of the present invention, the material of ultra-filtration membrane and reverse osmosis membrane was aromatic polyamides, polyethersulfone or polyvinylidene difluoride (PVDF).
Among the step a, the suspended substance removal rate of waste water is near 100%.Among the step b, most metal ion and organism are removed in the waste water, and organic clearance reaches more than 99%, and the clearance of metal ion reaches more than 95%, and the total amount that sees through metal ion in the liquid sees through the liquid specific conductivity less than 5 μ s/cm less than 8mg/l.
When concrete enforcement is of the present invention, the ultrafiltration and concentration liquid of step a and the reverse osmosis concentrated liquid of step b are carried out biochemical treatment; The reverse osmosis of step b is seen through the production process that liquid is back to use terephthalic acid.
Concentrated solution enters biochemical device and handles, and processing can be adopted the aerobic biochemical treatment process, wastewater treatment back up to standard discharging.Very low through metal ion in the liquid and organic concentration, generally speaking, can be used as the hydrogenating reduction refined unit that the general technology water is back to use Production of Terephthalic Acid.
When concrete enforcement is of the present invention, the reverse osmosis of step b is carried out ion exchange treatment through liquid, obtain treatment solution; Ion exchange treatment adopts a kind of or its combination of anionite-exchange resin, Zeo-karb, and ion exchange resin is styrene ion exchange resin.
Implement the time of the present invention concrete, the treatment solution of ion-exchange is back to use the production process of terephthalic acid, as the hydrogenating reduction refined unit.
Through ion exchange treatment, go out electrical conductivity of water less than 1 μ s/cm, metal ion total amounts such as cobalt, manganese, iron, chromium, palladium, nickel are less than 1mg/l, and clearance reaches more than 99%; To organic clearances such as carboxyl benzaldehyde, phenylformic acid, p-methylbenzoic acids near 100%.Water outlet reaches Production of Terephthalic Acid with the water quality standard of de-salted water, can be used as technology and is back to use the production process of terephthalic acid with de-salted water, as the hydrogenating reduction refined unit.Production of Terephthalic Acid sees Table 1 with the water quality requirement of de-salted water.
Table 1
| Project | Unit | Index |
| Specific conductivity | μs/cm | ≤1.0 |
| Copper | Wt/10 6 | ≤0.2 |
| Iron | Wt/10 6 | ≤0.5 |
| Silicide | Wt/10 6 | ≤3 |
| Sulfide | Wt/10 6 | ≤60 |
| Total solid amount | Wt/10 6 | ≤5 |
When concrete enforcement was of the present invention, ion exchange treatment adopted the electrodeionization system, obtains treatment solution; The working pressure of electrodeionization is that 25～125PSi, service temperature are 20～50 ℃; The treatment solution of electrodeionization system is back to use the production process of terephthalic acid.
Electrodeionization system (EDI) combines electrodialytic technique and ion exchange technique, can remove the electrolyte ion impurity of trace in the water effectively, produce high-quality pure water continuously, have characteristics such as simple, convenient operating maintenance is installed, need not acid-alkali regeneration, be free from environmental pollution.
Adopt the GE E-cell of company electrodeionization system (EDI) to handle reverse osmosis and see through liquid, obtain highly purified water, specific conductivity is lower than 0.2 μ s/cm, can be used as technology and is back to use the production process of terephthalic acid with de-salted water, as the hydrogenating reduction refined unit.
Adopt Production of Terephthalic Acid wastewater treatment method of the present invention, through handling, suspended substance in the waste water is removed fully, metal ion such as dissolved cobalt, manganese and organic clearances such as carboxyl benzaldehyde, phenylformic acid, p-methylbenzoic acid are reached more than 99% in the waste water, go out electrical conductivity of water less than 1 μ s/cm, water outlet reaches the water quality requirement of purification of terephthalic acid technology with de-salted water.Adopt treatment process of the present invention, can realize the recycle of water, the reclamation rate height of waste water can reach more than 70%.
Embodiment
Be described in further detail technical scheme of the present invention below in conjunction with embodiment, protection scope of the present invention is not limited to following embodiment.
Embodiment 1
The a collection of refined wastewater of certain terephthalic acid production plant, it is composed as follows:
| Project | Content |
| Total solids | 0.4％ |
| Cobalt | 10.03ppm |
| Manganese | 13.72ppm |
| Iron | 0.96ppm |
| Chromium | 0.09ppm |
| Nickel | 0.28ppm |
| Calcium | 5.42ppm |
| Magnesium | 4.18ppm |
| Silicon | 0.21ppm |
| Titanium | ＜0.05ppm |
| Palladium | ＜0.05ppm |
| Copper | ＜0.05ppm |
| To carboxyl benzaldehyde | 233.6ppm |
| Phenylformic acid | 356.7ppm |
| P-methylbenzoic acid | 258.2ppm |
| Terephthalic acid | 14.8ppm |
| Phthalic acid | 70.1ppm |
| M-phthalic acid | 136.7ppm |
| Specific conductivity | 336μs/cm |
Above-mentioned waste water is carried out the film pre-treatment, and pretreatment process is ultrafiltration, removes suspended solid, macromole and colloidalmaterial in the waste water, obtains ultrafiltration and sees through liquid and ultrafiltration and concentration liquid; Tubular ultra-filtration membrane is adopted in ultrafiltration, and the material of ultra-filtration membrane is a high molecular polymer, and the aperture of ultra-filtration membrane is 0.01 μ m, and the water inlet pH of ultrafiltration is 9.9, and the working pressure of ultrafiltration is that 0.50MPa, service temperature are 20 ℃.
Ultrafiltration is seen through liquid carry out the film processing, treatment process is an osmosis filtration, removes ultrafiltration through organism and metal ion in the liquid, obtains reverse osmosis and sees through liquid and reverse osmosis concentrated liquid; Coiled reverse osmosis membrane is adopted in reverse osmosis, and the material of reverse osmosis membrane is a high molecular polymer, and the water inlet pH of reverse osmosis is 9.8, working pressure is that 100PSi, service temperature are 20 ℃.
It is composed as follows that reverse osmosis sees through liquid:
| Project | Content | Clearance |
| Total solids | Do not detect | ～100％ |
| Cobalt | 5.3ppb | ＞99％ |
| Manganese | 6.2ppb | ＞99％ |
| Iron | 6.3ppb | ＞99％ |
| Chromium | 4.0ppb | ＞99％ |
| Nickel | 1.9ppb | ＞99％ |
| Calcium | Do not detect | ～100％ |
| Magnesium | Do not detect | ～100％ |
| Silicon | Do not detect | ～100％ |
| Titanium | 1.3ppb | ＞99％ |
| Palladium | Do not detect | ～100％ |
| Copper | 1.9ppb | ＞99％ |
| To carboxyl benzaldehyde | Do not detect | ～100％ |
| Phenylformic acid | 1.13ppm | ＞99％ |
| P-methylbenzoic acid | 0.60ppm | ＞99％ |
| Terephthalic acid | Do not detect | ～100％ |
| Phthalic acid | Do not detect | ～100％ |
| M-phthalic acid | Do not detect | ～100％ |
| Specific conductivity | 2.8μs /cm | ＞99％ |
Ultrafiltration and concentration liquid and reverse osmosis concentrated liquid are sent into biochemical device handle, handle and adopt the aerobic biochemical treatment process, wastewater treatment back up to standard discharging.Reverse osmosis is very low through metal ion in the liquid and organic concentration, has reached the general requirement of Production of Terephthalic Acid, can be used as the hydrogenating reduction refined unit that the general technology water is back to use Production of Terephthalic Acid.
Embodiment 2
Another of certain terephthalic acid production plant batch refined wastewater, it is composed as follows:
| Project | Content |
| Total solids | 0.6％ |
| Cobalt | 23.64ppm |
| Manganese | 35.25ppm |
| Iron | 1.26ppm |
| Chromium | 0.13ppm |
| Nickel | 0.52ppm |
| Calcium | 10.52ppm |
| Magnesium | 8.22ppm |
| Silicon | 0.29ppm |
| Titanium | ＜0.05ppm |
| Palladium | ＜0.05ppm |
| Copper | ＜0.05ppm |
| To carboxyl benzaldehyde | 453.3ppm |
| Phenylformic acid | 553.7ppm |
| P-methylbenzoic acid | 382.1ppm |
| Terephthalic acid | 57.8ppm |
| Phthalic acid | 130.6ppm |
| M-phthalic acid | 286.4ppm |
| Specific conductivity | 458μs/cm |
Above-mentioned waste water is carried out the film pre-treatment, and pretreatment process is ultrafiltration, removes micro-suspended solid, macromole and colloidalmaterial in the waste water, obtains ultrafiltration and sees through liquid and ultrafiltration and concentration liquid; Tubular ultra-filtration membrane is adopted in ultrafiltration, and the material of ultra-filtration membrane is a high molecular polymer, and the aperture of ultra-filtration membrane is 0.05 μ m, and the water inlet pH of ultrafiltration is 6.0, working pressure is that 0.10MPa, service temperature are 50 ℃.
Ultrafiltration is seen through liquid carry out the film processing, treatment process is an osmosis filtration, removes ultrafiltration through organism and metal ion in the liquid, obtains reverse osmosis and sees through liquid and reverse osmosis concentrated liquid; Coiled reverse osmosis membrane is adopted in reverse osmosis, and the material of reverse osmosis membrane is a high molecular polymer, and the water inlet pH of reverse osmosis is 6.1, and the working pressure of reverse osmosis is that 400PSi, service temperature are 50 ℃.
It is composed as follows that reverse osmosis sees through liquid:
| Project | Content | Clearance |
| Total solids | Do not detect | ～100％ |
| Cobalt | 8.2ppb | ＞99％ |
| Manganese | 7.4ppb | ＞99％ |
| Iron | 7.9ppb | ＞99％ |
| Chromium | 6.1ppb | ＞99％ |
| Nickel | 3.2 | ＞99％ |
| Calcium | 0.5ppb | ＞99％ |
| Magnesium | 0.3ppb | ＞99％ |
| Silicon | Do not detect | ～100％ |
| Titanium | 2.1ppb | ＞99％ |
| Palladium | Do not detect | ～100％ |
| Copper | 2.7ppb | ＞99％ |
| To carboxyl benzaldehyde | Do not detect | ～100％ |
| Phenylformic acid | 1.92ppm | ＞99％ |
| P-methylbenzoic acid | 1.03ppm | ＞99％ |
| Terephthalic acid | Do not detect | ～100％ |
| Phthalic acid | Do not detect | ～100％ |
| M-phthalic acid | Do not detect | ～100％ |
| Specific conductivity | 4.3μs/cm | ＞99％ |
Ultrafiltration and concentration liquid and reverse osmosis concentrated liquid are sent into biochemical device handle, handle and adopt the aerobic biochemical treatment process, wastewater treatment back up to standard discharging.Reverse osmosis is very low through metal ion in the liquid and organic concentration, has reached the general requirement of Production of Terephthalic Acid, can be used as the hydrogenating reduction refined unit that the general technology water is back to use Production of Terephthalic Acid.
Embodiment 3
The a collection of refined wastewater of certain terephthalic acid production plant composed as follows:
| Project | Content |
| Total solids | 0.6％ |
| Cobalt | 18.03ppm |
| Manganese | 19.75ppm |
| Iron | 0.83ppm |
| Chromium | 0.12ppm |
| Nickel | 0.23ppm |
| Calcium | 6.26ppm |
| Magnesium | 5.71ppm |
| Silicon | 0.18ppm |
| Titanium | ＜0.05ppm |
| Palladium | ＜0.05ppm |
| Copper | ＜0.05ppm |
| To carboxyl benzaldehyde | 225.6ppm |
| Phenylformic acid | 386.2ppm |
| P-methylbenzoic acid | 249.1ppm |
| Terephthalic acid | 15.3ppm |
| Phthalic acid | 73.5ppm |
| M-phthalic acid | 140.4ppm |
| Specific conductivity | 358μs/cm |
Adopt ultrafiltration and the reverse-osmosis treated process identical with embodiment 1, operational condition is: the water inlet pH of ultrafiltration is 8.5, and the working pressure of ultrafiltration is that 0.3MPa, service temperature are 30 ℃; The water inlet pH of reverse osmosis is 8.0, and the working pressure of reverse osmosis is that 300PSi, service temperature are 35 ℃.
It is composed as follows that reverse osmosis sees through liquid:
| Project | Content | Clearance |
| Total solids | Do not detect | ～100％ |
| Cobalt | 5.4ppb | ＞99％ |
| Manganese | 5.7ppb | ＞99％ |
| Iron | 5.7ppb | ＞99％ |
| Chromium | 4.6ppb | ＞99％ |
| Nickel | 2.8ppb | ＞99％ |
| Calcium | Do not detect | ～100％ |
| Magnesium | Do not detect | ～100％ |
| Silicon | Do not detect | ～100％ |
| Titanium | 0.7ppb | ＞99％ |
| Palladium | Do not detect | ～100％ |
| Copper | 1.9ppb | ＞99％ |
| To carboxyl benzaldehyde | Do not detect | ～100％ |
| Phenylformic acid | 0.27ppm | ＞99％ |
| P-methylbenzoic acid | 0.41ppm | ＞99％ |
| Terephthalic acid | Do not detect | ～100％ |
| Phthalic acid | Do not detect | ～100％ |
| M-phthalic acid | Do not detect | ～100％ |
| Specific conductivity | 2.2μs/cm | ＞99％ |
Ultrafiltration and concentration liquid and reverse osmosis concentrated liquid are sent into biochemical device handle, handle and adopt the aerobic biochemical treatment process, wastewater treatment back up to standard discharging.
Reverse osmosis is seen through liquid carry out ion exchange treatment, obtain treatment solution.Ion exchange unit adopts two styrene ion exchange resin packed columns, each one of cation seperation column and anion column, and the high 1.5m of every pillar, two series connection are used, and operational condition is: room temperature, flow 350ml/h.
The water outlet of ion exchange unit (treatment solution) composed as follows:
| Project | Content | Clearance |
| Total solids | Do not detect | ～100％ |
| Cobalt | 2.5ppb | ＞99％ |
| Manganese | 2.8ppb | ＞99％ |
| Iron | 2.8ppb | ＞99％ |
| Chromium | 2.4ppb | ＞99％ |
| Nickel | 1.5ppb | ＞99％ |
| Calcium | Do not detect | ～100％ |
| Magnesium | Do not detect | ～100％ |
| Silicon | Do not detect | ～100％ |
| Titanium | 0.3ppb | ＞99％ |
| Palladium | Do not detect | ～100％ |
| Copper | 1.1ppb | ＞99％ |
| To carboxyl benzaldehyde | Do not detect | ～100％ |
| Phenylformic acid | 0.13ppm | ＞99％ |
| P-methylbenzoic acid | 0.20ppm | ＞99％ |
| Terephthalic acid | Do not detect | ～100％ |
| Phthalic acid | Do not detect | ～100％ |
| M-phthalic acid | Do not detect | ～100％ |
| Specific conductivity | 0.6μs/cm | ＞99％ |
In the water outlet of ion exchange unit (treatment solution), the content of organism and metal ion is very low, has reached the standard of Production of Terephthalic Acid with de-salted water, can be used as the hydrogenating reduction refined unit that process water is back to use Production of Terephthalic Acid.
Embodiment 4
The a collection of refined wastewater of certain terephthalic acid production plant, its waste water composition is identical with embodiment 3, and the treating processes of its ultrafiltration, reverse osmosis, operational condition, reverse osmosis see through liquid and form identical with embodiment 3.
Ion exchange treatment adopts the electrodeionization system, obtains treatment solution.Electrodeionization is selected E-cell system of GE company for use, and working pressure is that 25PSi, service temperature are 50 ℃.Electrodeionization obtains highly purified water after handling, and its specific conductivity is 0.2 μ s/cm, reaches the standard of Production of Terephthalic Acid with de-salted water, can be used as the hydrogenating reduction refined unit that process water is back to use Production of Terephthalic Acid.
Embodiment 5
The a collection of refined wastewater of certain terephthalic acid production plant, its waste water composition is identical with embodiment 3, and the treating processes of its ultrafiltration, reverse osmosis, operational condition, reverse osmosis see through liquid and form identical with embodiment 3.
Ion exchange treatment adopts the electrodeionization system, obtains treatment solution.Electrodeionization is selected E-cell system of GE company for use, and working pressure is that 125PSi, service temperature are 20 ℃.Electrodeionization obtains highly purified water after handling, and its specific conductivity is 0.1 μ s/cm, reaches the standard of Production of Terephthalic Acid with de-salted water, can be used as the hydrogenating reduction refined unit that process water is back to use Production of Terephthalic Acid.
Claims (10)
1, a kind of Production of Terephthalic Acid wastewater treatment method, the organic content of described waste water are that 1000～2000mg/l, metal ion content are that 30～80mg/l, solid suspension content are 0.4～0.6 (w) %, and this treatment process may further comprise the steps successively:
A. above-mentioned waste water is carried out the film pre-treatment, pretreatment process is ultrafiltration, obtains ultrafiltration and sees through liquid and ultrafiltration and concentration liquid;
B. ultrafiltration is seen through liquid and carry out the film processing, treatment process is an osmosis filtration, obtains reverse osmosis and sees through liquid and reverse osmosis concentrated liquid.
2, a kind of Production of Terephthalic Acid wastewater treatment method according to claim 1 is characterized in that:
The organism of described waste water comprises: phenylformic acid, in carboxyl benzaldehyde, p-methylbenzoic acid, terephthalic acid, phthalic acid, m-phthalic acid, acetate, the methyl acetate one or more; The metal ion of described waste water comprises: one or more in cobalt ion, mn ion, iron ion, chromium ion, nickel ion, calcium ion, magnesium ion, titanium ion, palladium ion, the cupric ion.
3, a kind of Production of Terephthalic Acid wastewater treatment method according to claim 1 is characterized in that:
Tubular ultra-filtration membrane is adopted in ultrafiltration, and the material of ultra-filtration membrane is a high molecular polymer, and the aperture of ultra-filtration membrane is 0.01～0.05 μ m, and the water inlet pH of ultrafiltration is 6～10, and the working pressure of ultrafiltration is that 0.1～0.5MPa, service temperature are 20～50 ℃.
4, a kind of Production of Terephthalic Acid wastewater treatment method according to claim 1 is characterized in that:
Coiled reverse osmosis membrane is adopted in reverse osmosis, and the material of reverse osmosis membrane is a high molecular polymer, and the water inlet pH of reverse osmosis is 6～10, and the working pressure of reverse osmosis is that 100～400PSi, service temperature are 20～50 ℃.
5, according to claim 3 or 4 described a kind of Production of Terephthalic Acid wastewater treatment method, it is characterized in that:
The material of ultra-filtration membrane and reverse osmosis membrane is aromatic polyamides, polyethersulfone or polyvinylidene difluoride (PVDF).
6, according to the described a kind of Production of Terephthalic Acid wastewater treatment method of one of claim 1～5, it is characterized in that:
The ultrafiltration and concentration liquid of step a and the reverse osmosis concentrated liquid of step b are carried out biochemical treatment;
The reverse osmosis of step b is seen through the production process that liquid is back to use terephthalic acid.
7, according to the described a kind of Production of Terephthalic Acid wastewater treatment method of one of claim 1～5, it is characterized in that:
Reverse osmosis to step b is carried out ion exchange treatment through liquid, obtains treatment solution.
8, a kind of Production of Terephthalic Acid wastewater treatment method according to claim 7 is characterized in that:
Ion exchange treatment adopts a kind of or its combination of anionite-exchange resin, Zeo-karb, and ion exchange resin is styrene ion exchange resin.
9, a kind of Production of Terephthalic Acid wastewater treatment method according to claim 8 is characterized in that:
The treatment solution of ion-exchange is back to use the production process of terephthalic acid.
10, a kind of Production of Terephthalic Acid wastewater treatment method according to claim 7 is characterized in that:
Ion exchange treatment adopts the electrodeionization system, obtains treatment solution;
The working pressure of electrodeionization is that 25～125PSi, service temperature are 20～50 ℃;
The treatment solution of electrodeionization system and device is back to use the production process of terephthalic acid.
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Cited By (12)
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| CN100408491C (en) * | 2006-07-28 | 2008-08-06 | 沈福昌 | No pollution treatment technique for residue of refined terephthalic acid thin-film evaporator |
| CN101254985B (en) * | 2008-04-02 | 2010-06-02 | 中国纺织工业设计院 | PTA refined mother liquor reclaiming method and system |
| WO2010066181A1 (en) * | 2008-12-08 | 2010-06-17 | 中国石油天然气集团公司 | Simple method and system for recycling mother liquor of pta apparatus efficiently |
| CN101544429B (en) * | 2009-04-23 | 2011-06-15 | 中国石化仪征化纤股份有限公司 | Extraction-hyperfiltration-reverse osmosis combined method for treating PTA refined wastewater |
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| JPS60118283A (en) * | 1983-11-30 | 1985-06-25 | Nec Kansai Ltd | Treatment of organic solvent-containing waste water |
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| CN1110457C (en) * | 1999-08-18 | 2003-06-04 | 中国人民解放军军事医学科学院卫生装备研究所 | Production process of pharmaceutic water and its equipment |
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