CN203382611U - Treatment device for wastewater from production of purified terephthalic acid - Google Patents
Treatment device for wastewater from production of purified terephthalic acid Download PDFInfo
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- CN203382611U CN203382611U CN201320419333.9U CN201320419333U CN203382611U CN 203382611 U CN203382611 U CN 203382611U CN 201320419333 U CN201320419333 U CN 201320419333U CN 203382611 U CN203382611 U CN 203382611U
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Abstract
The utility model discloses a treatment device for wastewater from production of purified terephthalic acid. The treatment device mainly comprises a neutralization tank, a settling device, a regulating tank, an anaerobic reactor, a cooling tower, a first-section aerobic biochemical reactor, a second-section aerobic biochemical reactor, a sludge concentrator, a sludge dehydrator and a terephthalic acid dehydrator, wherein a water outlet pipeline of the anaerobic reactor is divided into two branches, one branch is connected with a water inlet of the regulating tank, the other branch is connected with a water inlet of the cooling tower, a water outlet of the cooling tower is connected with a water inlet of the first-section aerobic biochemical reactor, and a water outlet of the first-section aerobic biochemical reactor is connected with a water inlet of the second-section aerobic biochemical reactor. By adopting the treatment device disclosed by the utility model, most of alkalinity can be recovered, the stability of water quality of the wastewater is ensured, the quality of outlet water is good, and the efficiency is high; simultaneously, the occupied area is greatly reduced, and the operation cost is lowered.
Description
Technical field
The utility model relates to environmental engineering and technology for treating industrial waste water field, relates in particular to a kind for the treatment of unit of water from refined p-benzene dicarboxylic acid production.
Background technology
Pure terephthalic acid (PTA) is that output occupy the first five important petrochemicals of ten of the whole world, be the main raw material of producing polyester (PET), be widely used in the production fields such as fiber terylene, polyester film, packing bottle, PBT engineering plastics, plastic plasticizer, agricultural chemicals and dyestuff.The waste water that its production process produces contains the organic pollutants such as terephthalic acid, acetic acid, methyl acetate, tolyl acid, wherein with the content the highest (1400～4500mg/L) of terephthalic acid (TA), is the index contact scar thing in this waste water.The PTA factory effluent has COD concentration high (can up to 10000mg/L), the water quality characteristics such as the COD concentration that especially aromatics causes is higher, pH value meta-acid (3.0～4.0), heavy metal content high (cobalt, mn ion), being known as both at home and abroad is the difficult trade effluent of a kind of typical case, flood tide.
In pure terephthalic acid (PTA) factory effluent, the content of terephthalic acid (TA) is higher, pH is lower, and pipe blow-through generally adopts alkali lye to clean, the pH of waste water is higher, in prior art, the different waste water to potential of hydrogen, general adopt respectively directly acid adding or add after alkali is regulated carry out again the method for aftertreatment, acid adding in this process, to add alkali number higher, causes a large amount of soda acids wastes, and make in waste water saltiness higher, bring contingency question to treating processes and reusing sewage.
CN201110039932.3 discloses a kind of Anoxybiotic-aerobic biologic fluidized-bed sewage treatment process, this technique is reacted the sewage raw material anoxic biological fluidized bed of first making a gift to someone, a reacted logistics part is back to the anoxic biological fluidized bed as backflow, rest part enters aerobic biological fluid-bed the reaction, a reacted logistics part is back to the anoxic biological fluidized bed after as the recirculate mixing refluxed with the anoxic biological fluidized bed, and rest part enters separator out and separated from aerobic biological fluid-bed.This process spent water processing efficiency is lower, and the load of biochemical system and impact resistance are also lower, and needs to increase the dosage of more soda acid, for processing Production of Terephthalic Acid waste water, lacks specific aim.
The utility model content
In order to solve treating processes acid adding that prior art exists, to add alkali number higher, and make that saltiness in waste water is higher, the technical problem of long flow path, complex management, the utility model provides a kind for the treatment of unit of water from refined p-benzene dicarboxylic acid production.
The treatment unit of a kind of water from refined p-benzene dicarboxylic acid production that the utility model provides mainly comprises: neutralization tank, settling vessel, equalizing tank, anaerobic reactor, cooling tower, one section aerobic biochemical reactor, two sections aerobic biochemical reactors, sludge concentrator, sludge dewatering device and terephthalic acid water traps, wherein, the neutralization tank water outlet is connected with the settling vessel water-in, settling vessel bottom water outlet is connected with terephthalic acid water trap water-in, the water outlet of settling vessel middle and upper part is connected with the equalizing tank water-in, the equalizing tank water outlet is connected with the anaerobic reactor water-in, the anaerobic reactor water outlet pipeline is divided into two branch roads, a branch road is connected with the equalizing tank water-in, another branch road is connected with the cooling tower water-in, the cooling tower water outlet is connected with the water-in of one section aerobic biochemical reactor, the water outlet of one section aerobic biochemical reactor is connected with the water-in of two sections aerobic biochemical reactors, the bottom sludge outlet of one section aerobic biochemical reactor and two sections aerobic biochemical reactors is connected with sludge concentrator by pipeline respectively, sludge concentrator is connected with the sludge dewatering device, sludge concentrator is connected with equalizing tank respectively by pipeline with the sludge dewatering device.
Described anaerobic reactor is upflow anaerobic sludge blanket reactor (UASB) or internal-circulation anaerobic reactor (IC reactor), and these two kinds of anaerobic reactors are routine techniques.
One section aerobic biochemical reactor adopts activated sludge reactor, and settling tank is not set, and two sections aerobic biochemical reactors adopt membrane bioreactors (MBR), but from the mud of two sections aerobic biochemical reactors also partial reflux to section aerobic biochemical reactor.The aerobic biochemical reactor is also routine techniques.
Described anaerobic reactor also can connect a gas storage holder, and gas storage holder is for collecting the waste gas from anaerobic reactor.
Described one section aerobic biochemical reactor is connected with air compressor respectively with two sections aerobic biochemical reactors, and air compressor is for improving the required air of biochemical reaction.
The beneficial effects of the utility model:
(1) most of basicity, as recirculation water, is reclaimed in the water part of anaerobic reactor, has guaranteed the stable of waste water quality, has adjusted the pH value that enters anaerobic reactor waste water, has cancelled adding of alkali;
(2) adopt the two-stage aerobic biochemical reactor, one section aerobic biochemical adopts activated sludge process, and two sections aerobic biochemicals adopt membrane bioreactor, and effluent quality is good, and efficiency is high, and water outlet is directly used in circulating water system after the thing of killing livestock is processed;
(3) adopt anaerobic technique and membrane biological reaction technique, decrease floor space, reduced running cost.
The accompanying drawing explanation
The treatment unit structure diagram that Fig. 1 is a kind of water from refined p-benzene dicarboxylic acid production of the present utility model.
In figure: 1-neutralization tank, 2-settling vessel, 3-equalizing tank, 4-anaerobic reactor, the 5-cooling tower, mono-section aerobic biochemical reactor of 6-, bis-sections aerobic biochemical reactors of 7-, 8-sludge concentrator, 9-sludge dewatering device, 10-terephthalic acid water trap, 11-gas storage holder, 12-air compressor.
Embodiment
Below in conjunction with accompanying drawing, the utility model is further elaborated.
As shown in Figure 1, the treatment unit of water from refined p-benzene dicarboxylic acid production of the present utility model mainly comprises: neutralization tank 1, settling vessel 2, equalizing tank 3, anaerobic reactor 4, cooling tower 5, one section aerobic biochemical reactor 6, two sections aerobic biochemical reactors 7, sludge concentrator 8, sludge dewatering device 9 and terephthalic acid water traps 10, wherein, neutralization tank 1 water outlet is connected with settling vessel 2 water-ins, settling vessel 2 bottom water outlets are connected with terephthalic acid water trap 10 water-ins, the water outlet of settling vessel 2 middle and upper parts is connected with equalizing tank 3 water-ins, equalizing tank 3 water outlets are connected with anaerobic reactor 4 water-ins, anaerobic reactor 4 water outlet pipeline are divided into two branch roads, a branch road is connected with equalizing tank 3 water-ins, another branch road is connected with cooling tower 5 water-ins, cooling tower 5 water outlets are connected with the water-in of one section aerobic biochemical reactor 6, the water outlet of one section aerobic biochemical reactor 6 is connected with the water-in of two sections aerobic biochemical reactors 7, the bottom sludge outlet of one section aerobic biochemical reactor 6 and two sections aerobic biochemical reactors 7 is connected with sludge concentrator 8 by pipeline respectively, sludge concentrator 8 is connected with sludge dewatering device 9, sludge concentrator 8 is connected with equalizing tank 3 respectively by pipeline with sludge dewatering device 9.Anaerobic reactor 4 is connected with gas storage holder 11, the waste gas that gas storage holder 11 produces for storing anaerobic reactor 4.Air compressor 12 is connected with two sections aerobic biochemical reactors 7 with one section aerobic biochemical reactor 6 respectively, for biochemical reaction provides required air.
During operation, the waste water of the pH containing terephthalic acid that pipe blow-through is discharged>6 (waste water that is called for short pH>6) is introduced neutralization tank 1 with the factory effluent (waste water that are called for short pH<6) of the pH that contains terephthalic acid<6 and is mixed, carry out neutralization reaction in the interior potential of hydrogen of waste water self of utilizing of neutralization tank 1, obtain the waste water containing the terephthalic acid solid particle, its pH is slant acidity slightly;
The entering settling vessel 2 containing the waste water of terephthalic acid solid particle out from neutralization tank 1, carry out cyclone sediment at the interior centrifugal force that utilizes water flow rotary to produce of settling vessel 2, remove terephthalic acid solid (TA) particle, the waste water of the summary slant acidity of the terephthalic acid solid that is removed particle, the terephthaldehyde's granulates precipitated outward transport after 10 dehydrations of terephthalic acid water trap; From settling vessel 2 waste water of the summary slant acidity of removal terephthaldehyde granulates out with enter equalizing tank 3 after the recirculation water of summary meta-alkalescence from anaerobic reactor 4 mixes, adjust the pH value in the interior potential of hydrogen of waste water self of utilizing of equalizing tank 3, add nutrition regulates simultaneously, assurance enters the water quality of anaerobic reactor 4, in the bottom of equalizing tank 3, is provided with agitator under liquid; From equalizing tank 3, waste water out enters the interior reaction of anaerobic reactor 4.
The waste water obtained through anaerobic reaction is divided into two portions, a part as recirculation water with enter equalizing tank 3 after the waste water of the summary slant acidity of removal terephthaldehyde granulates out from settling vessel 2 mixes, another part enters one section aerobic biochemical reactor 6 after cooling tower 5 is cooling to carry out one section aerobic biochemical and reacts.2 times of the wastewater flow rate that wherein amount of recirculation water is the summary slant acidity of discharging after settling vessel 2 cyclone sediments, the quantity of reflux of anaerobic reactor 4 effluent adopting 200%, its objective is recovery basicity.Anaerobic reactor 4 running environment meta-alkalescences, the about 6000mg/L of water inlet organic contamination substrate concentration, water outlet organic contamination substrate concentration is about 1000mg/L, in the organic pollutant degradation process, produces basicity.The pH value of anaerobic reactor 4 water outlets (generally being not less than 7.5) is higher, the pH value 6.0～6.5 of anaerobic reactor 4 water inlets, the quantity of reflux of anaerobic reactor 4 effluent adopting 200%, can take full advantage of the basicity produced in wastewater treatment process, cancel and add alkali, reduce variation water quality, the waste gas that anaerobic reactor 4 produces in addition enters gas storage holder 11; Process for cooling adopts the enclosed atmospheric cooling tower, and the cooling waste water temperature is lower than 40 ℃.One section aerobic biochemical reactor 6 adopts moving-bed bioreactor, by air compressor 12 blast aeration oxygenations, utilizes the microbiological deterioration organic pollutant;
Waste water after one section aerobic biochemical reactor 6 is processed is introduced two sections aerobic biochemical reactors 7 and is carried out two sections aerobic biochemical reactions, the required air of biochemical reaction is provided by air compressor 12, reacted waste water discharging device, water outlet COD is less than 50mh/L, after microbicidel is processed, is back to circulating water system water as a supplement;
The mud of one section aerobic biochemical reactor 6 and two sections aerobic biochemical reactor 7 discharges is introduced to sludge concentrator 8 and first concentrated, the mud after concentrating enters sludge dewatering device 9 and carries out processed, and the mud after dehydration is discharged outward transport with the mud cake form.The waste water that mud produces after concentrating, dewatering returns to equalizing tank 3 so that supplementary recirculation water to be provided.
Claims (5)
1. the treatment unit of a water from refined p-benzene dicarboxylic acid production, is characterized in that: mainly comprise neutralization tank, settling vessel, equalizing tank, anaerobic reactor, cooling tower, one section aerobic biochemical reactor, two sections aerobic biochemical reactors, sludge concentrator, sludge dewatering device and terephthalic acid water traps, wherein, the neutralization tank water outlet is connected with the settling vessel water-in, settling vessel bottom water outlet is connected with terephthalic acid water trap water-in, the water outlet of settling vessel middle and upper part is connected with the equalizing tank water-in, the equalizing tank water outlet is connected with the anaerobic reactor water-in, the anaerobic reactor water outlet pipeline is divided into two branch roads, a branch road is connected with the equalizing tank water-in, another branch road is connected with the cooling tower water-in, the cooling tower water outlet is connected with the water-in of one section aerobic biochemical reactor, the water outlet of one section aerobic biochemical reactor is connected with the water-in of two sections aerobic biochemical reactors, the bottom sludge outlet of one section aerobic biochemical reactor and two sections aerobic biochemical reactors is connected with sludge concentrator by pipeline respectively, sludge concentrator is connected with the sludge dewatering device, sludge concentrator is connected with equalizing tank respectively by pipeline with the sludge dewatering device.
2. treatment unit according to claim 1, it is characterized in that: described anaerobic reactor is upflow anaerobic sludge blanket reactor or internal-circulation anaerobic reactor.
3. treatment unit according to claim 1, is characterized in that: described one section aerobic biochemical reactor employing activated sludge reactor, two sections aerobic biochemical reactors employing membrane bioreactors.
4. treatment unit according to claim 1, it is characterized in that: described anaerobic reactor is connected with a gas storage holder.
5. treatment unit according to claim 1, it is characterized in that: described one section aerobic biochemical reactor is connected with air compressor respectively with two sections aerobic biochemical reactors.
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| CN201320419333.9U CN203382611U (en) | 2013-07-08 | 2013-07-08 | Treatment device for wastewater from production of purified terephthalic acid |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105314794A (en) * | 2014-09-28 | 2016-02-10 | 苏州市白云环保工程设备有限公司 | Sodium carboxymethyl cellulose production wastewater treatment process |
| CN111689654A (en) * | 2020-06-30 | 2020-09-22 | 新疆中泰创新技术研究院有限责任公司 | Sewage treatment system and method capable of reducing PTA anaerobic sludge feeding |
| CN111762981A (en) * | 2020-07-21 | 2020-10-13 | 新疆中泰创新技术研究院有限责任公司 | PTA sewage treatment system and treatment method |
-
2013
- 2013-07-08 CN CN201320419333.9U patent/CN203382611U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105314794A (en) * | 2014-09-28 | 2016-02-10 | 苏州市白云环保工程设备有限公司 | Sodium carboxymethyl cellulose production wastewater treatment process |
| CN111689654A (en) * | 2020-06-30 | 2020-09-22 | 新疆中泰创新技术研究院有限责任公司 | Sewage treatment system and method capable of reducing PTA anaerobic sludge feeding |
| CN111762981A (en) * | 2020-07-21 | 2020-10-13 | 新疆中泰创新技术研究院有限责任公司 | PTA sewage treatment system and treatment method |
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Granted publication date: 20140108 |