CN107628727A - A kind of system and group technology of advanced treating coal chemical industrial waste water persistent organic pollutants - Google Patents
A kind of system and group technology of advanced treating coal chemical industrial waste water persistent organic pollutants Download PDFInfo
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- CN107628727A CN107628727A CN201710932870.6A CN201710932870A CN107628727A CN 107628727 A CN107628727 A CN 107628727A CN 201710932870 A CN201710932870 A CN 201710932870A CN 107628727 A CN107628727 A CN 107628727A
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Abstract
The invention discloses a kind of system and group technology of advanced treating coal chemical industrial waste water persistent organic pollutants.The present invention is using coal chemical industrial waste water biochemical treatment water outlet as process object, by efficient High-speed clarification device, one-level ozone oxidation tower, secondary reinforcement catalytic ozonation tower, buffer pool, BAF, biological carbon filter and charcoal absorption filter process, ozone utilization rate can be increased substantially, efficiently catalyzing and oxidizing persistent organic pollutants, it is obviously improved wastewater biodegradability, and pass through depth biodegradation and absorbing process, ensure that stable effluent quality is up to standard, the even running of the energy follow-up reuse water station of effective guarantee, solves the advanced treating problem of coal chemical industry crushed coal pressure gasifying phenol ammonia waste water, realize that zero-emission provides strength and supported for coal chemical industrial waste water, it is a kind of combination process for advanced treatment being worthy to be popularized.
Description
Technical field
The present invention relates to environment-protection wastewater processing technology field, more particularly to a kind of advanced treating coal chemical industrial waste water difficult degradation to have
The system and group technology of organic pollutants.
Background technology
The oil-poor few gas richness coal in China, energy security are in an emergency, and clean coal utilization is the inevitable mission of energy security, coal chemical industry
It is the important channel of clean coal utilization, but coal chemical industry is highly energy-consuming, high pollution, highly water intensive industry again simultaneously.It is reported that production
1t synthesis ammonia need to consume fresh water about 12.5m3, fresh water about 15m need to be consumed by producing 1t methanol3, fresh water need to be consumed about by producing 1t dimethyl ether
15m3, direct liquefaction 1t oil need to consume fresh water about 7m3, indirect liquefaction 1t oil need to consume fresh water about 12m3.Coal chemical industrial waste water, especially
It is crushed coal pressure gasifying technique waste water complicated component, Biostatic is strong, belongs to heavily contaminated organic wastewater with difficult degradation thereby, intractability
Greatly.According to correlation analysis testing result, phenol ammonia waste water caused by crushed coal pressure gasifying technique, 244 kinds of organic pollutions are detected altogether, are contained
There is heterocyclic compound of polycyclic phenols, naphthalene, quinoline, pyridine etc., heterocyclic hardly degraded organic substance and oxygen-containing, nitrogen, carbon etc..Due to broken
Also there is more bio-refractory material in phenol ammonia waste water caused by coal pressure gasification, such as after Two-Stage Biochemical is handled, in water outlet
Tetradecanoic acid, n- pentadecanoic acids, the isometric chain aliphatic hydrocarbon of hexadecanoic acid, anti-form-1,2,3,4- tetrahydro -6- methoxyl groups -2- (4- penta
Butylcyclohexyl) heterocyclic, the esters pollutant such as naphthalene, diisooctyl phthalate, double (8- Nonyls) esters of 1,2- benzoic acid, still
It is difficult to meet discharge or reuse standard, if being directly entered waste water recycling unit, the stable operation of follow-up system will be influenceed, therefore have
It is necessary that further advanced treating is carried out to such waste water.
At present, the advanced treating of coal chemical industry crushed coal pressure gasifying technique waste water is still domestic and international difficult point, and current Xinjiang,
The coal chemical industry in Inner Mongol area realizes one of key point of wastewater zero discharge, especially by the phenol ammonia waste water COD in technique waste watercrFrom
200~350mg/L is handled to 40~50mg/L, is met into reuse water station condition, and Current Domestic has many different techniques, but
The case of successful operation is few.
Chinese patent CN 103145299B disclose " a kind of deep treatment method of Lurgi coal gasification wastewater ", mainly
Including：First, Coagulation and Adsorption is handled；2nd, high density precipitation process；3rd, advanced oxidation processing (ozone oxidation)；4th, continuous aeration
Intermittent stirring processing；5th, intermittent aeration biological treatment；6th, V-type sand filter is handled, that is, completes advanced treatment of wastewater.But the hair
Bright to avoid potassium permanganate composites fluctuation of service, ozone dosage is big, and utilization rate is low, has selection to Recalcitrant chemicals
Property, the deficiencies of effluent quality is unstable.
Therefore, the advanced treating efficient, stable, effluent quality is good of being degraded for persistent organic pollutants is sought
Technology is more difficult at present and needs to solve the problems, such as.
The content of the invention
The defects of the object of the invention is exactly to make up prior art, there is provided a kind of persistent organic pollutants degraded is high
The advanced treatment system of persistent organic pollutants in effect, the coal chemical industrial waste water biochemical tail water that stable, effluent quality is good
And group technology.
The present invention is achieved by the following technical solutions：
A kind of system of advanced treating coal chemical industrial waste water persistent organic pollutants, the system include efficient High-speed clarification
Device, one-level ozone oxidation tower, secondary reinforcement catalytic ozonation tower, buffer pool, BAF, biological carbon filter and work
To bypass the charcoal absorption filter for measure of checking on.
Described one-level ozone oxidation tower, secondary reinforcement catalytic ozonation tower collectively constitute two-stage coupling ozone catalytic oxygen
Change system, gas mode is given using series connection, ozone disposably adds in one-level ozone oxidation tower air inlet, and residue ozone tail gas is by two
Level strengthens the discharge of catalytic ozonation tower gas outlet, realizes the cascade utilization of ozone.
Described one-level ozone oxidation tower is used based on ozone oxidation system, and secondary reinforcement catalytic ozonation tower is using smelly
The catalytic oxidation system that one or more in oxygen and Mn, Zr, Bi ion form for heterogeneous catalysis made of active component.
A kind of group technology of advanced treating coal chemical industrial waste water persistent organic pollutants, this method comprise the following steps：
1. coal chemical industrial waste water biochemical system secondary clarifier effluent is lifted into efficient High-speed clarification device, by adding flocculant
20~50mg/L of PAC, flocculation aid 1~10mg/L of PAM, the suspension efficiently, in steady removal sewage remained, colloid, colourity,
The polluters such as non-solubility CODcr.
2. the waste water through the efficient High-speed clarification device processing of step 1 enters two-stage coupling catalytic ozonation system, i.e. one-level
Ozone oxidation tower, secondary reinforcement catalytic ozonation tower.One-level based on ozone oxidation reaction, ozone dosage be 10~
30mg/L, hydraulic detention time are 0.5~1h, mainly for easily by the organic matter of ozone oxidation, the type organic is by ozone oxygen
The intermediate product difficulty formed after change together enters secondary reinforcement ozone catalytic by ozone oxidation with unreacted hardly degraded organic substance
Zoneofoxidation, the area use the one or more in ozone and Mn, Zr, Bi ion as heterogeneous catalysis group made of active component
Into catalytic oxidation system, catalyst filling rate is 20~50%, in the reaction zone persistent organic pollutants by catalytic ozonation
Caused great amount of hydroxy group free radical efficient degradation, is further oxidized to small molecular organic acid, carbon dioxide and water, and waste water is biochemical
Property significantly improves, 0.5~2h of hydraulic detention time,
3. the water outlet that the processing of catalytic ozonation system is coupled through step 2 two-stage enters buffer pool, pass through ozone itself
Decay and extension reaction time eliminate its toxic action to downstream BAF system, to strengthen follow-up biochemical treatment
Effect.
4. the water outlet handled through step 3 buffer pool enters BAF, COD in sewage is further reducedcr、BOD5、
NH3The polluters such as-N, 2.5~4.0m of filtering velocity3/m2.h, 70~80min of empty bed hydraulic detention time.
5. the water outlet handled through step 4 BAF enters biological carbon filter, 9~15m of filtering velocity3/m2.h, life is passed through
The biodegradation of thing film and the adsorption dual effect of activated carbon, which are strengthened, removes the pollutants such as dirty Organic substance in water, suspension, colourity
Matter, further improve effluent quality.
6. the water outlet handled through step 5 biological carbon filter has met discharge or reuse water station influent quality under normal circumstances
It is required that waste water recycling unit can be directly entered.When raw water quality is poor or the abnormal condition such as process upstream fluctuation of service under,
When biological carbon filter water outlet can not meet discharge or reuse water station influent quality requirement, then the measure of checking on is set up, by biology prospecting
Pond water outlet enters alternative activity charcoal adsorption filter, and depth removes the COD remained in waste watercr, suspension, the pollutant such as colloid
Matter, Chinese effluent or entrance reuse water unit, complete the advanced treating of waste water.
It is an advantage of the invention that：
1. the group technology that the present invention uses, there are extremely strong specific aim, degraded height to Recalcitrant chemicals in biochemical tail water
Imitate, be stable, water outlet is reliable.
It is simple, efficiently 2. the efficient High-speed clarification device that the present invention uses, can quickly remove remained in waste water suspension,
Colloid, colourity, non-solubility CODcrDeng polluter, follow-up ozone dosage is effectively reduced.
3. the two-stage coupling catalytic ozonation system that the present invention uses, by adding ozone and catalyst, is generated big
OH free radicals are measured, significantly improve the removal effect to Recalcitrant chemicals and colourity, in whole processing procedure, ozone uses
Connect and give gas mode, realize the cascade utilization of ozone, increase substantially the utilization rate of ozone, effectively reduce processing cost.
4. the biological carbon filter that the present invention uses, acted on using the biodegradation of biomembrane and the adsorption dual of activated carbon,
Strengthen and remove the pollutants such as dirty Organic substance in water, suspension, colourity, noxious material, further improve effluent quality.
5. the present invention using charcoal absorption filter as checking on measure, it is flexible operation, reliable, raw water quality can be tackled
Difference, process upstream run the accident situation such as abnormal, improve the ability of system anti-shock loading, effective guarantee effluent quality.
Brief description of the drawings
Fig. 1 is the process chart of the present invention.
Embodiment
Embodiment 1
Certain crushed coal pressure gasifying technique waste water is lifted into efficient High-speed clarification device through biochemical treatment water outlet by pump, adds wadding
Solidifying agent PAC 30mg/L, flocculation aid PAM 1mg/L, clarified, precipitation process quickly remove the suspension remained in waste water, glue
Body, colourity, non-solubility CODcrDeng polluter；Efficient High-speed clarification device water outlet enters two-stage coupling catalytic ozonation system
System, ozone dosage 30mg/L wherein in one-level ozone oxidation tower, hydraulic detention time 1h, by ozonidation, goes
It is while except part difficult degradation COD that larger molecular organicses open loop, chain rupture, water outlet and remaining ozone is smelly into the two level of series connection
Oxygen catalysis oxidizing tower, the interior one or more filled in zeolite-loaded Mn, Zr, Bi ion of tower are heterogeneous made of active component
Catalyst, filling rate 40%, hydraulic detention time 2h, OH is produced certainly by the synergy of ozone and heterogeneous catalysis
By base, strengthen and remove extremely difficult degraded COD, further improve wastewater biodegradability, two-stage coupling catalytic ozonation system water outlet
Into buffer pool, the ozone of residual voluntarily decomposed, decayed, avoid the toxic action to subsequent bio system, during hydraulic retention
Between be 2h；Buffer pool water outlet enters BAF, filter tank BOD5Load Nw=0.3kg/m3Filtrate .d, filtering velocity 2.6m3/
M2h, empty bed residence time 80min, by the degradation of microorganism, depth removes dirty water pollutant；Aeration and biological is filtered
Pond water outlet enters biological carbon filter, filter tank BOD5 load Nw=0.5kg/m3 filtrate .d, filtering velocity 10m3/m2h, passes through microorganism
Degraded and charcoal absorption double action, strengthen to remove that CODcr, suspension, the polluter such as colloid are remained in sewage；Biology
Carbon filtering pool water outlet carries out processing of checking on into charcoal absorption filter, completes the advanced treating of waste water, standard water discharge discharge or
Into reuse water unit.Specific treatment effect is shown in Table 1.
Table 1
Embodiment 2
Present embodiment crushed coal pressure gasifying biochemical tail water water quality, i.e. embodiment influent quality as different from Example 1
Different, secondary ozone catalysis oxidizing tower, the interior one or more filled in zeolite-loaded Mn, Zr, Bi ion of tower are activearm
Heterogeneous catalysis filling rate made of point is 35%, hydraulic detention time 1.5h, other steps and parameter and specific implementation
Example 1 is identical.Specific treatment effect is shown in Table 2.
Table 2
Embodiment 3
Present embodiment crushed coal pressure gasifying biochemical tail water water quality, i.e. embodiment influent quality as different from Example 1
Different, secondary ozone catalysis oxidizing tower, the interior one or more filled in zeolite-loaded Mn, Zr, Bi ion of tower are activearm
Heterogeneous catalysis filling rate made of point is 35%, hydraulic detention time 1h, biological carbon filter water outlet can qualified discharge or
Into reuse water unit, do not enter charcoal absorption filter and complete advanced treating, other steps and parameter and specific implementation
Example 1 is identical.Specific treatment effect is shown in Table 3.
Table 3
Claims (8)
1. a kind of system of advanced treating coal chemical industrial waste water persistent organic pollutants, it is characterised in that the system includes efficient
High-speed clarification device, one-level ozone oxidation tower, secondary reinforcement catalytic ozonation tower, buffer pool, BAF, biology prospecting
Pond and the charcoal absorption filter for measure of being checked on as bypass.
2. a kind of system of advanced treating coal chemical industrial waste water persistent organic pollutants according to claim 1, its feature
It is, described one-level ozone oxidation tower, secondary reinforcement catalytic ozonation tower collectively constitute two-stage coupling catalytic ozonation
System, gas mode is given using series connection, ozone disposably adds in one-level ozone oxidation tower air inlet, and residue ozone tail gas is by two level
Strengthen the discharge of catalytic ozonation tower gas outlet, realize the cascade utilization of ozone.
3. a kind of system of advanced treating coal chemical industrial waste water persistent organic pollutants according to claim 1, its feature
It is, described one-level ozone oxidation tower is used based on ozone oxidation system, and secondary reinforcement catalytic ozonation tower uses ozone
And the catalytic oxidation system that the one or more in Mn, Zr, Bi ion form for heterogeneous catalysis made of active component.
4. a kind of group technology of advanced treating coal chemical industrial waste water persistent organic pollutants, it is characterised in that will using right
System described in 1-3 is sought, this method comprises the following steps：
（1）Coal chemical industrial waste water enters efficient High-speed clarification device, by adding 20~50mg/L of flocculant PAC, flocculation aid PAM 1
~10 mg/L, remove the polluters such as the suspension remained in sewage, colloid, colourity, non-solubility CODcr；
（2）Through step（1）The waste water of efficient High-speed clarification device processing enters two-stage coupling catalytic ozonation system processing, described
Two-stage coupling catalytic ozonation system include one-level ozone oxidation tower, secondary reinforcement catalytic ozonation tower, remove sewage
In hardly degraded organic substance；
（3）Through step（2）Water outlet after two-stage coupling catalytic ozonation system processing enters buffer pool, makes the ozone of residual certainly
Row decomposes, decay, eliminates the toxic action to downstream BAF system；
（4）Through step（3）The water outlet of buffer pool processing enters BAF, further reduces COD in sewagecr、BOD5、
NH3The polluters such as-N；
（5）Through step（4）The water outlet of BAF processing enters biological carbon filter, by the biodegradable of biomembrane and lives
Property charcoal adsorption dual effect strengthen and remove the polluters such as dirty Organic substance in water, suspension, colourity；
（6）Through step（5）The water outlet of biological carbon filter processing is when having met discharge or reuse water station influent quality requirement, directly
Into waste water recycling unit, when discharge or reuse water station influent quality requirement can not be met, then adsorbed into alternative activity charcoal
Filter, depth remove the COD remained in waste watercr, suspension, after the polluter such as colloid, Chinese effluent or into recycle-water
Unit, complete the advanced treating of waste water.
5. a kind of group technology of advanced treating coal chemical industrial waste water persistent organic pollutants according to claim 4, its
It is characterised by, described coal chemical industrial waste water is water outlet after biochemical system is handled, its CODcrConcentration is 200~350mg/L.
6. a kind of group technology of advanced treating coal chemical industrial waste water persistent organic pollutants according to claim 4, its
It is characterised by, described one-level ozone oxidation tower ozone dosage is 10~30mg/L, and hydraulic detention time is 0.5~1h, two
The catalyst filling rate that level strengthens catalytic ozonation tower is 20~50%, 0.5~2h of hydraulic detention time.
7. a kind of group technology of advanced treating coal chemical industrial waste water persistent organic pollutants according to claim 4, its
It is characterised by, described BAF filtering velocity is 2.5~4.0 m3/m2.h, the empty min of bed hydraulic detention time 70~80.
8. a kind of group technology of advanced treating coal chemical industrial waste water persistent organic pollutants according to claim 4, its
It is characterised by, described biological carbon filter filtering velocity is 9~15 m3/ m2.h。
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| CN108906073A (en) * | 2018-07-18 | 2018-11-30 | 南京大学盐城环保技术与工程研究院 | A kind of catalyst, decoloration device and its discoloration method for industrial wastewater decoloration |
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| CN111499094A (en) * | 2020-04-13 | 2020-08-07 | 南京卓越环保科技有限公司 | Harmless treatment method of high-concentration sodium pyridinol acid water |
| CN112777858A (en) * | 2020-12-23 | 2021-05-11 | 首创爱华(天津)市政环境工程有限公司 | Ozone catalytic oxidation wastewater treatment method |
| CN113429014A (en) * | 2021-06-12 | 2021-09-24 | 广州绿邦环境技术有限公司 | Method and equipment for treating industrial wastewater by multistage ozone catalytic oxidation |
| CN115093072A (en) * | 2022-06-09 | 2022-09-23 | 江苏方洋水务有限公司 | Advanced treatment method for petrochemical high-salinity degradation-resistant wastewater |
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| CN111499094A (en) * | 2020-04-13 | 2020-08-07 | 南京卓越环保科技有限公司 | Harmless treatment method of high-concentration sodium pyridinol acid water |
| CN112777858A (en) * | 2020-12-23 | 2021-05-11 | 首创爱华(天津)市政环境工程有限公司 | Ozone catalytic oxidation wastewater treatment method |
| CN113429014A (en) * | 2021-06-12 | 2021-09-24 | 广州绿邦环境技术有限公司 | Method and equipment for treating industrial wastewater by multistage ozone catalytic oxidation |
| CN115093072A (en) * | 2022-06-09 | 2022-09-23 | 江苏方洋水务有限公司 | Advanced treatment method for petrochemical high-salinity degradation-resistant wastewater |
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Application publication date: 20180126 |