CN105084630A - Oil refining catalyst wastewater zero-discharging treatment method - Google Patents
Oil refining catalyst wastewater zero-discharging treatment method Download PDFInfo
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- CN105084630A CN105084630A CN201510479513.XA CN201510479513A CN105084630A CN 105084630 A CN105084630 A CN 105084630A CN 201510479513 A CN201510479513 A CN 201510479513A CN 105084630 A CN105084630 A CN 105084630A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
- Y02A20/124—Water desalination
- Y02A20/131—Reverse-osmosis
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Abstract
The invention relates to an oil refining catalyst wastewater zero-discharging treatment method. The oil refining catalyst wastewater zero-discharging treatment method comprises the following steps that (1) oil refining catalyst wastewater is treated in a high-density sedimentation tank to obtain sedimentation wastewater; (2) the sedimentation wastewater is fed into a multi-media filter to obtain produced water of the multi-media filter; (3) the produced water of the multi-media filter is fed into an ultra-filtration system and is further treated to obtain ultra-filtration water; (4) the ultra-filtration water is regulated to be weak-acidic and then is fed into a sea water desalination type reverse-osmosis system, and reverse-osmosis concentrated water is obtained through treatment; (5) the reverse-osmosis concentrated water is fed into an efficient electrodialysis system for concentration or into a conventional reverse-osmosis system for reverse osmosis respectively according to the salt content of the reverse-osmosis concentrated water; (6) the electrodialytic concentrated water is fed into a mechanical vapor compression (MVR) evaporator for concentration, the concentrated liquid is fed into a waste heat multiple-effect evaporative crystallization system, further evaporative concentration and crystallization are conducted on the concentrated wastewater, centrifugal dewatering is conducted on the concentrated liquid to obtain solid salt for recycling, and the produced water is reused. The oil refining catalyst wastewater zero-discharging treatment method is obvious in treatment effect and low in operation cost.
Description
Technical field
The present invention relates to oil refining catalyst field of waste water treatment, particularly relate to a kind of oil refining catalyst wastewater zero emission treatment method.
Background technology
Oil refining catalyst waste water has its singularity on composition, and one is containing a large amount of soluble solid material, especially SO
4 2-, Cl
-, molten silicon etc.; Two is that suspension content is high, and three is that ammonia nitrogen is high.Substantially discharge can be realized in early days by conventional process.In recent years, along with national environmental protection regulation is more and more tight, country is about to put into effect to the emission standard of brine waste, concerning oil refining catalyst waste water, the qualified discharge of high suspended matter and high-concentration salt-containing wastewater becomes enterprise's problem demanding prompt solution, although existing conventional water treatment method can realize zero release, processing cost is too high, and enterprise cannot bear.
Ammonia nitrogen in high density in current refinery water can be taked to add alkali stripping, composite steam stripping method etc. and be processed and recycle resource simultaneously; and suspended substance and soluble solid have become one of important bottleneck of restriction catalyzer development; therefore; the treatment process be suitable for is sought under the prerequisite meeting national environmental protection policy; while cost-saving substantially; realize the key that " zero release " becomes oil refining catalyst industry wastewater processing technology, to produce good environment protection effect and considerable economic worth.
Summary of the invention
Technical problem to be solved by this invention is to provide the oil refining catalyst wastewater zero emission treatment method that a kind for the treatment of effect is obvious, working cost is low.
For solving the problem, a kind of oil refining catalyst wastewater zero emission treatment method of the present invention, comprises the following steps:
(1) oil refining catalyst waste water is through integrating the potassium permanganate composites process of tube settling and sludge condensation, the waste water after being precipitated;
(2) the waste water after described precipitation enters in more medium filter, obtains more medium filter respectively and produces water and more medium filter backwash water; Described more medium filter backwash water returns described potassium permanganate composites and carries out coagulating kinetics;
(3) described more medium filter produces water and enters ultrafiltration system through the water outlet of described more medium filter and process further, obtains ultrafiltration respectively and produces water and the dense water of ultrafiltration; The dense water of described ultrafiltration returns described potassium permanganate composites and carries out coagulating kinetics;
Described ultrafiltration produce water mass concentration be 0.1% NaOH solution regulate its pH value to slightly acidic after enter sea water desaltination series reverse osmosis system process, obtain reverse osmosis produced water and reverse osmosis concentrated water respectively; Described reverse osmosis produced water collects reuse;
(5) when described reverse osmosis concentrated water saltiness reaches 50,000 mg/L, enter efficient electric electrodialysis system and concentrate, obtain the dense water of electric osmose division power and water dialysis respectively; When the TDS of described electric osmose division water reaches 2000mg/L, enter in conventional reverse osmosis system and carry out reverse osmosis, obtain the dense water of conventional reverse osmosis and conventional reverse osmosis product water respectively; The dense water of described conventional reverse osmosis returns described ultrafiltration system, and conventional reverse osmosis produces water and collects reuse;
(6) the dense water of described electrodialysis enters in mechanical type vapour compression MVR vaporizer and concentrates, gained concentrated solution enters in used heat multiple-effect evaporation crystal system the further evaporation concentration of waste water after concentrated and crystallization, recycle the solid salt obtained after its dope centrifuge dehydration, it produces water then reuse.
The present invention compared with prior art has the following advantages:
1, because the present invention adopts the potassium permanganate composites treatment system integrating tube settling and sludge condensation, therefore, not only deposition efficiency is high, compact construction, reduce Civil Cost and save construction land, and with pressure external recycle of sludge system, the strainer net that can make full use of returned sluge flocculation technique catches impurity such as removing hard, basicity, COD with adsorption, makes effluent quality good; Anti impulsion load simultaneously, is not subject to the impact of flow or water quality load variations in a big way; Running cost is low in addition, compared with traditional technology, can save the medicament of 10% ~ 30%.
2, the present invention is directed to the chlorine residue of oil refining catalyst waste water, feature that saltiness is high, select ultrafiltration as the pretreatment technology of reverse osmosis system, make stable effluent quality, the work-ing life of follow-up reverse osmosis membrane can be extended, reduce the frequency of its cleaning, increase the Penetration ration of reverse osmosis membrane simultaneously, reduce the investment cost of reverse osmosis unit.
3, the feature that the present invention is directed to oil refining catalyst waste water selects the reverse osmosis system of sea water desaltination series, this reverse osmosis system is except not consuming soda acid in the process of concentrated salt, do not generate other pollution substances, meet outside environmental requirement, also is furnished with energy recycle device, the horsepower requirements to high-pressure pump can be reduced, reduce cost of investment.
4, the present invention select producing water ratio up to more than 95% efficient electric electrodialysis system, make waste water reclamation rate higher, stable operation cycle is longer.
5, the mode that the present invention selects mechanical steam recompression MVR technology and spraying or air-flow tail gas waste heat evaporative crystallization to combine is evaporated and crystallization treatment electrodialysis concentrated solution, the latent heat of 100% recycle secondary steam is compressed by mechanical type, vaporization efficiency is high, without the need to steam (only consuming a small amount of steam in start-up course) in evaporative process, it is energy-saving evaporation technique of new generation.In the present invention, can by the saltiness evaporation concentration in waste water to 25% by MVR, evaporate waste water energy consumption per ton and amount to power consumption at 25 ~ 34kWh, then carry out negative pressure evaporation crystallization by useless thermogenetic steam, namely obtaining after crystal solution solid-liquid separation can the solid salt of reuse.
6, oil refining catalyst factory wastewater flow rate is 200t/h, and waste water mainly forms TDS content 2.5 × 10^4mg/L, SO
4 2-for 7922mg/L, Cl
-for 5630mg/L, molten silicon 23.5mg/L, adopt the present invention can produce TDS<100mg/h reuse water 155t/h, the evaporation lime set of the 39.6t/h of evaporation can reuse.
7, floor space of the present invention is little, investment reduction, level of automation are high, treatment effect is obvious, working cost is low, is applicable to the high suspended matter high resolution solid waste water treatment process of domestic oil refining catalyst enterprise, realizes oil refining catalyst wastewater zero discharge.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in further detail.
Fig. 1 is process flow sheet of the present invention.
In figure: 1-potassium permanganate composites, 2-more medium filter, 3-ultrafiltration system, 4-reverse osmosis system, 5-efficient electric electrodialysis system, 6-conventional reverse osmosis system, 7-mechanical steam compression MVR vaporizer, 8-used heat multiple-effect evaporation crystal system.
Embodiment
As shown in Figure 1, a kind of oil refining catalyst wastewater zero emission treatment method, comprises the following steps:
(1) the potassium permanganate composites 1(of oil refining catalyst waste water through integrating tube settling and sludge condensation should positive environmental protection, XJYHB series) process, remove the impurity such as hard, basicity, the COD in waste water, the waste water after being precipitated;
(2) the waste water after precipitation enters more medium filter 2(Yixing environmental protection, AGF series) in, suspended substance in further removal waste water and colloid, and the organism, bacterium, virus etc. in water is also partly removed along with the reduction of the turbidity of water, obtains more medium filter respectively and produce water and more medium filter backwash water; More medium filter backwash water returns potassium permanganate composites 1 and carries out coagulating kinetics;
(3) more medium filter produces water and enters ultrafiltration system 3(Coriolis, MP8081 through the water outlet of more medium filter 2) process further, obtain ultrafiltration respectively and produce water and the dense water of ultrafiltration; The dense water of ultrafiltration returns potassium permanganate composites 1 and carries out coagulating kinetics;
Ultrafiltration produce water mass concentration be 0.1% NaOH solution regulate its pH value to slightly acidic, to avoid SO
4 2-, the fouling such as molten silicon, enter reverse osmosis system 4(Tao Shi, the SW30 of sea water desaltination series after reducing hardness simultaneously) process, obtain reverse osmosis produced water and reverse osmosis concentrated water respectively; Reverse osmosis produced water collects reuse;
(5), when reverse osmosis concentrated water saltiness reaches 50,000 mg/L, enter efficient electric electrodialysis system 5(Ai Er environmental protection, 400 × 1600) concentrate, obtain the dense water of electric osmose division power and water dialysis respectively; When the TDS of electric osmose division water reaches 2000mg/L, enter conventional reverse osmosis system 6(Tao Shi, BW30) in carry out reverse osmosis, obtain the dense water of conventional reverse osmosis and conventional reverse osmosis respectively and produce water; The dense water of conventional reverse osmosis returns ultrafiltration system 3, and conventional reverse osmosis produces water and collects reuse;
(6) the dense water of electrodialysis enters mechanical type vapour compression MVR vaporizer 7(Tianhua Institute of Chemical Machinery & Automation Co., Ltd. provides) in concentrate, gained concentrated solution enters used heat multiple-effect evaporation crystal system 8(Tianhua Institute of Chemical Machinery & Automation Co., Ltd. and provides) in the further evaporation concentration of waste water after concentrated and crystallization, recycle the solid salt obtained after its dope centrifuge dehydration, it produces water then reuse.
Claims (1)
1. an oil refining catalyst wastewater zero emission treatment method, comprises the following steps:
(1) the potassium permanganate composites (1) of oil refining catalyst waste water through integrating tube settling and sludge condensation processes, the waste water after being precipitated;
(2) the waste water after described precipitation enters in more medium filter (2), obtains more medium filter respectively and produces water and more medium filter backwash water; Described more medium filter backwash water returns described potassium permanganate composites (1) and carries out coagulating kinetics;
(3) described more medium filter produces water and enters ultrafiltration system (3) through the water outlet of described more medium filter (2) and process further, obtains ultrafiltration respectively and produces water and the dense water of ultrafiltration; The dense water of described ultrafiltration returns described potassium permanganate composites (1) and carries out coagulating kinetics;
Described ultrafiltration produce water mass concentration be 0.1% NaOH solution regulate its pH value to slightly acidic after enter sea water desaltination series reverse osmosis system (4) process, obtain reverse osmosis produced water and reverse osmosis concentrated water respectively; Described reverse osmosis produced water collects reuse;
(5) when described reverse osmosis concentrated water saltiness reaches 50,000 mg/L, enter efficient electric electrodialysis system (5) and concentrate, obtain the dense water of electric osmose division power and water dialysis respectively; When the TDS of described electric osmose division water reaches 2000mg/L, enter in conventional reverse osmosis system (6) and carry out reverse osmosis, obtain the dense water of conventional reverse osmosis and conventional reverse osmosis product water respectively; The dense water of described conventional reverse osmosis returns described ultrafiltration system (3), and conventional reverse osmosis produces water and collects reuse;
(6) the dense water of described electrodialysis enters in mechanical type vapour compression MVR vaporizer (7) and concentrates, gained concentrated solution enters in used heat multiple-effect evaporation crystal system (8) the further evaporation concentration of waste water after concentrated and crystallization, recycle the solid salt obtained after its dope centrifuge dehydration, it produces water then reuse.
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105417826A (en) * | 2015-12-30 | 2016-03-23 | 北京清大国华环境股份有限公司 | Catalyst waste water zero discharge method and device |
| CN106746119A (en) * | 2016-12-23 | 2017-05-31 | 中国华能集团清洁能源技术研究院有限公司 | A kind of SCR denitration regenerates the processing system and method for pickling waste waters |
| CN107055907A (en) * | 2017-04-27 | 2017-08-18 | 华电电力科学研究院 | A kind of GTCC power plant wastewater zero discharge processing unit and handling process |
| CN107265735A (en) * | 2017-08-11 | 2017-10-20 | 山东招金膜天股份有限公司 | A kind of zero-emission recovery process of high salt silicon-containing wastewater |
| CN107840511A (en) * | 2017-11-10 | 2018-03-27 | 深圳能源资源综合开发有限公司 | Coal chemical industry method for treating strong brine and system |
| CN110950479A (en) * | 2019-12-25 | 2020-04-03 | 武汉越源环保科技有限公司 | Wastewater desalination system and wastewater desalination method |
| CN112429900A (en) * | 2020-11-18 | 2021-03-02 | 内蒙古晶泰环境科技有限责任公司 | Method for optimizing trend of membrane concentration ultrafiltration cross flow concentrated water |
| CN112794500A (en) * | 2020-12-29 | 2021-05-14 | 华夏碧水环保科技有限公司北京分公司 | Coking wastewater strong brine near-zero emission treatment system and treatment method thereof |
| CN113371909A (en) * | 2021-06-08 | 2021-09-10 | 中石化南京化工研究院有限公司 | Method for recycling wastewater generated in methanol synthesis catalyst production |
| CN113968650A (en) * | 2020-07-23 | 2022-01-25 | 中国石油化工股份有限公司 | System and method for recycling wastewater generated in pseudoboehmite production |
| CN115572008A (en) * | 2022-09-27 | 2023-01-06 | 上海电气电站环保工程有限公司 | Environment-friendly waste water evaporation crystallization processing system |
| CN116119862A (en) * | 2022-12-27 | 2023-05-16 | 江苏永葆环保科技股份有限公司 | Reduction treatment method for waste emulsion |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106746119A (en) * | 2016-12-23 | 2017-05-31 | 中国华能集团清洁能源技术研究院有限公司 | A kind of SCR denitration regenerates the processing system and method for pickling waste waters |
| CN107055907A (en) * | 2017-04-27 | 2017-08-18 | 华电电力科学研究院 | A kind of GTCC power plant wastewater zero discharge processing unit and handling process |
| CN107265735A (en) * | 2017-08-11 | 2017-10-20 | 山东招金膜天股份有限公司 | A kind of zero-emission recovery process of high salt silicon-containing wastewater |
| CN107840511A (en) * | 2017-11-10 | 2018-03-27 | 深圳能源资源综合开发有限公司 | Coal chemical industry method for treating strong brine and system |
| CN110950479A (en) * | 2019-12-25 | 2020-04-03 | 武汉越源环保科技有限公司 | Wastewater desalination system and wastewater desalination method |
| CN113968650A (en) * | 2020-07-23 | 2022-01-25 | 中国石油化工股份有限公司 | System and method for recycling wastewater generated in pseudoboehmite production |
| CN112429900A (en) * | 2020-11-18 | 2021-03-02 | 内蒙古晶泰环境科技有限责任公司 | Method for optimizing trend of membrane concentration ultrafiltration cross flow concentrated water |
| CN112794500A (en) * | 2020-12-29 | 2021-05-14 | 华夏碧水环保科技有限公司北京分公司 | Coking wastewater strong brine near-zero emission treatment system and treatment method thereof |
| CN113371909A (en) * | 2021-06-08 | 2021-09-10 | 中石化南京化工研究院有限公司 | Method for recycling wastewater generated in methanol synthesis catalyst production |
| CN115572008A (en) * | 2022-09-27 | 2023-01-06 | 上海电气电站环保工程有限公司 | Environment-friendly waste water evaporation crystallization processing system |
| CN116119862A (en) * | 2022-12-27 | 2023-05-16 | 江苏永葆环保科技股份有限公司 | Reduction treatment method for waste emulsion |
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Application publication date: 20151125 |