CN105668846A - Fine processing technology of coal chemical aromatics-containing wastewater - Google Patents
Fine processing technology of coal chemical aromatics-containing wastewater Download PDFInfo
- Publication number
- CN105668846A CN105668846A CN201610025905.3A CN201610025905A CN105668846A CN 105668846 A CN105668846 A CN 105668846A CN 201610025905 A CN201610025905 A CN 201610025905A CN 105668846 A CN105668846 A CN 105668846A
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- water
- demulsifier
- waste water
- equipment
- fine processing
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/24—Treatment of water, waste water, or sewage by flotation
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/40—Devices for separating or removing fatty or oily substances or similar floating material
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2101/00—Nature of the contaminant
- C02F2101/30—Organic compounds
- C02F2101/32—Hydrocarbons, e.g. oil
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/34—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32
- C02F2103/36—Nature of the water, waste water, sewage or sludge to be treated from industrial activities not provided for in groups C02F2103/12 - C02F2103/32 from the manufacture of organic compounds
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/08—Multistage treatments, e.g. repetition of the same process step under different conditions
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- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Water Treatment By Sorption (AREA)
Abstract
The invention relates to a fine processing technology of coal chemical aromatics-containing wastewater. The technical scheme comprises the following technological steps: (1) wastewater firstly enters an adjusting tank to be simply mixed, an inlet of the adjusting tank is provided with a dosing unit, and a demulsifier is added for demulsification, wherein the demulsifier is a p-tert-butyl phenolic polyether demulsifier; (2) sewage enters air floatation equipment through the adjusting tank to undergo air-floatation treatment; (3) an effluent from the air floatation equipment enters a filter unit to be filtered; (4) an effluent from the filter system enters adsorption equipment to be adsorbed; and (5) an effluent from the adsorption equipment undergoes deep treatment by a membrane separation technology, purified water obtained is used as boiler water or circulating cooling water, and a concentrated solution is sent to other equipment to be treated. The invention has the following beneficial effects: advantages of technologies such as air floatation, filtration, adsorption and membrane separation, etc. are combined, produced water from FMTA equipment is greatly treated, the effluent can reach index of boiler water, and the problem that the wastewater is hard to process is solved.
Description
Technical field
The present invention relates to the advanced treatment process of a kind of Coal Chemical Industry MTO technology waste water, particularly to a kind of Coal Chemical Industry fine processing technique containing aromatic hydrocarbons waste water, its water outlet can be used as boiler feed water and recirculated cooling water.
Background technology
Methanol aromatics process waste water is the waste water that methanol produces in course of reaction, wherein contain a certain amount of oil, acidic materials and aromatic hydrocarbons, because its arene content is high, the toxicity of microorganism is big, being difficult to biochemical treatment, sewage treatment process conventional at present is difficult to Organic substance therein is effectively degraded; But such waste water is without float and various inorganic ions, reduces again the cost of its process from another point of view. Adopt suitable technique to remove Organic substance therein, this effluent part is comprehensively utilized, it is possible to arrive the purpose recycled of water resource.
Currently for the process of middle low concentration wastewater containing benzene, mainly adopting activated carbon adsorption and advanced oxidation processes to process, activated carbon adsorption can effectively remove the aromatic hydrocarbons in sewage, but its cost is too high, makes the environmental protection operating cost of enterprise be greatly increased; Advanced oxidation processes is a kind of novel sewage treatment process that development in recent years is got up, removal organic in sewage is had good effect by it, but aromatic hydrocarbons is a more dysoxidizable type organic, the removing of such species needs to add substantial amounts of oxidant and can be only achieved expected effect, equipment investment and operating cost are higher, cause the increase of cost. Therefore, exploitation is a kind of, and technological process is simple, treatment effect is high, the novel advanced treatment process containing aromatic hydrocarbons waste water that cost is low so that it is as industrial circulating cooling water and boiler feed water, from resource circulation utilization angle, become a kind of green sustainable development direction.
Summary of the invention
The purpose of the present invention is aiming at the problem that methanol aromatic hydrocarbons wastewater toxicity is big, difficulty treatment technology cost biochemical, existing is high that prior art exists, Coal Chemical Industry that a kind of air supporting, filtration, absorption and membrane separation technique the organically combine fine processing technique containing aromatic hydrocarbons waste water is provided, this technique can effectively remove the Organic substance in such waste water, water outlet is made to reach boiler feed water standard, it is achieved that recycling of water resource.
Its technical scheme is to comprise the following steps that:
(1) waste water initially enters regulating reservoir and simply mixes, and sets chemicals dosing plant at regulating reservoir entrance, adds demulsifier breakdown of emulsion, and described demulsifier is p-tert-butylphenol aldehyde polyethers demulsifier, and addition is 1-5ppm;
(2) sewage be adjusted pond enter air-floating apparatus carry out air-flotation process, described air-floating apparatus is shallow layer flotation machine;
(3) air-floating apparatus water outlet enters filtration devices, and described defecator adopts fiber ball filter;
(4) filtration system water outlet entrance adsorbent equipment adsorbs, and described adsorbent equipment is active coke adsorbent;
(5) adsorbent equipment effluent adopting membrane isolation technics carries out advanced treating, and gained scrubbing water uses as boiler feed water or recirculated cooling water, and concentrated solution part is delivered to the sewage of other devices and carried out conventional treatment.
Membrane separation technique described in above-mentioned steps (5) adopts reverse osmosis membrane, operating temperature be room temperature to 50 DEG C, operating pressure is 0.5-10Mpa.
The fibrous nodules diameter of above-mentioned fiber ball filter is 35-45mm.
Above-mentioned p-tert-butylphenol aldehyde polyethers demulsifier adopts p-tert-butylphenol aldehyde polyoxyethylene poly-oxygen propylene aether, and block number therein is 3, and the mol ratio of oxirane and expoxy propane is 3:2, and its demulsification is better.
The invention has the beneficial effects as follows: present invention incorporates the advantage of the technology such as air supporting, filtration, absorption and membrance separation, the output water of methanol aromatic device there is good treatment effect, make its water outlet can reach the index of boiler feed water, solve the intractable problem of such waste water. This demulsifier has highly branched chain structure, and surface activity is stronger, it is possible to be preferentially adsorbed on oil-water interfaces, with the interfacial film strength being easily reduced emulsion, simultaneously after break down of boundary film, there is higher agglutinating power, accelerating breakdown of emulsion and dewatering speed, demulsification is better than the straight chain demulsifier commonly used;
This technique has the advantage that
(1) adopt air supporting and the defecator that operating cost is low, can effectively remove the oil in waste water and partial organic substances, significantly reduce the load of follow-up adsorbent equipment, extend the regeneration period of adsorbent, reduce its absorption cost;
(2) adopting active coke adsorbent, its mesopore is flourishing, is particularly conducive to the aromatic hydrocarbons in absorption effluent and fatty acid Organic substance, and relative to acticarbon, its mechanical strength increases, and absorption property is more excellent, and cost is substantially reduced;
(3) after absorption, the organic pollution in water is substantially reduced, and alleviates the load of follow-up membrane separation process, after membrance separation, and the index of the complete load boiler water of effluent quality and recirculated cooling water;
(4) method that this technique all adopts physical separation, investment cost and operating cost are relatively low.
Accompanying drawing explanation
Accompanying drawing 1 is the structural representation of the present invention.
Detailed description of the invention
As it is shown in figure 1, the process step of the invention is as follows:
The water inlet of methanol aromatic device wastewater deep treatment process is the isolated waste water of reaction unit, its water quality index is as follows: COD is 1549mg/L, SS is 0, and hardness is 0, arene content (benzene,toluene,xylene) is 123mg/L, content of fatty acid (acetic acid, propanoic acid, butanoic acid) is 267mg/L, oil content is 160mg/L.
The first step, the waste water water of methanol aromatics production line discharge imports regulating reservoir mixing, feature according to this process units, before sewage discharge, has separated oil-water-gas, eliminate most free oil, therefore oil contained in the waste water discharged is oil emulsion, it is necessary to adds appropriate demulsifier and carries out breakdown of emulsion, is conducive to follow-up air-float technology, added demulsifier is p-tert-butylphenol aldehyde polyethers demulsifier, and addition is 5ppm.After adding demulsifier, waste water is stirred, makes demulsifier and waste water be sufficiently mixed, to reach optimum efficiency.
Second step, the waste water after breakdown of emulsion is adjusted pond entrance air-floating apparatus and carries out oil removal by air bubbling, and the employing shallow layer flotation machine of air supporting routine carries out, and air supporting can remove the most of oil in waste water and partial organic substances. After air-flotation process, in waste water, oil content is down to 30mg/L, COD is 1280mg/L.
3rd step, waste water enters defecator and removes oil therein and partial organic substances further, and filter adopts fiber ball filter, and fibrous nodules diameter is about 40mm. Filtration can remove remaining oil therein and partial organic substances. After filtering, in waste water, oil content is down to 3mg/L, COD is 1207mg/L.
4th step, filter the entrance adsorbent equipment of the waste water after oil removing to adsorb, adsorbent in adsorbent equipment adopts active coke adsorbent, this adsorbent contains abundant central hole structure, it is particularly suitable for absorption aromatic hydrocarbons and fatty acid Organic substance, adsorption effect is better than activated carbon, and price is less than the half of activated carbon. Absorption can remove most Organic substance and remaining oil in waste water. Adsorbent equipment water outlet COD is 303mg/L, and benzene homologues content is 13mg/L, and oil content is 1mg/L.
5th step, waste water enters membrane separation device, and reverse osmosis membrane selected by membrane module, adopts ripe technique, elimination wherein remaining Organic substance, makes waste water reach the standard of boiler feed water. In membrane separation device, waste water, COD is down to 18mg/L, and oil content is 0, and benzene homologues content is 0.
Above-mentioned p-tert-butylphenol aldehyde polyethers demulsifier adopts p-tert-butylphenol aldehyde polyoxyethylene poly-oxygen propylene aether, and block number therein is 3, and the mol ratio of oxirane and expoxy propane is 3:2, and its demulsification is better.
This demulsifier has highly branched chain structure, and surface activity is stronger, it is possible to be preferentially adsorbed on oil-water interfaces, it is easily reduced the interfacial film strength of emulsion, simultaneously after break down of boundary film, has higher agglutinating power, accelerating breakdown of emulsion and dewatering speed, demulsification is better than the straight chain demulsifier commonly used.
The above, be only the part preferred embodiment of the present invention, and equivalent technical scheme is revised or be revised as to any those of ordinary skill in the art all technical schemes possibly also with above-mentioned elaboration. Therefore, any simple modification carried out according to technical scheme or substitute equivalents, belong to the greatest extent the scope of protection of present invention.
Claims (4)
1. a Coal Chemical Industry fine processing technique containing aromatic hydrocarbons waste water, is characterized in that comprising the following steps that:
(1) waste water initially enters regulating reservoir and simply mixes, and sets chemicals dosing plant at regulating reservoir entrance, adds demulsifier breakdown of emulsion, and described demulsifier is p-tert-butylphenol aldehyde polyethers demulsifier, and addition is 1-5ppm;
(2) sewage be adjusted pond enter air-floating apparatus carry out air-flotation process, described air-floating apparatus is shallow layer flotation machine;
(3) air-floating apparatus water outlet enters filtration devices, and described defecator adopts fiber ball filter;
(4) filtration system water outlet entrance adsorbent equipment adsorbs, and described adsorbent equipment is active coke adsorbent;
(5) adsorbent equipment effluent adopting membrane isolation technics carries out advanced treating, and gained scrubbing water uses as boiler feed water or recirculated cooling water, and concentrated solution part is delivered to the sewage of other devices and carried out conventional treatment.
2. the Coal Chemical Industry according to claim 1 fine processing technique containing aromatic hydrocarbons waste water, is characterized in that: membrane separation technique described in described step (5) adopts reverse osmosis membrane, operating temperature be room temperature to 50 DEG C, operating pressure is 0.5-10Mpa.
3. the Coal Chemical Industry according to claim 1 fine processing technique containing aromatic hydrocarbons waste water, is characterized in that: the fibrous nodules diameter of described fiber ball filter is 35-45mm.
4. the Coal Chemical Industry according to claim 1 fine processing technique containing aromatic hydrocarbons waste water, it is characterized in that: described p-tert-butylphenol aldehyde polyethers demulsifier adopts p-tert-butylphenol aldehyde polyoxyethylene poly-oxygen propylene aether, block number therein is 3, and the mol ratio of oxirane and expoxy propane is 3:2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201610025905.3A CN105668846A (en) | 2016-01-15 | 2016-01-15 | Fine processing technology of coal chemical aromatics-containing wastewater |
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| CN201610025905.3A CN105668846A (en) | 2016-01-15 | 2016-01-15 | Fine processing technology of coal chemical aromatics-containing wastewater |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108101262A (en) * | 2017-12-22 | 2018-06-01 | 张征北 | A kind of coal gas method for purifying water |
| CN108101312A (en) * | 2017-12-30 | 2018-06-01 | 华电煤业集团有限公司 | A kind of system of the wastewater treatment containing aromatic hydrocarbons |
| CN111153512A (en) * | 2018-11-08 | 2020-05-15 | 中国石油化工股份有限公司 | Method and device for treating wastewater containing benzene series and application thereof |
| CN111836678A (en) * | 2018-03-15 | 2020-10-27 | 东丽株式会社 | Fluid separation membrane |
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| CN103275753A (en) * | 2013-05-31 | 2013-09-04 | 沈红新 | Multifunctional crude oil tank farm treating agent |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108101262A (en) * | 2017-12-22 | 2018-06-01 | 张征北 | A kind of coal gas method for purifying water |
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| CN111836678A (en) * | 2018-03-15 | 2020-10-27 | 东丽株式会社 | Fluid separation membrane |
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| CN111153512A (en) * | 2018-11-08 | 2020-05-15 | 中国石油化工股份有限公司 | Method and device for treating wastewater containing benzene series and application thereof |
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