CN102211839A - Method for treating coal chemical wastewater - Google Patents
Method for treating coal chemical wastewater Download PDFInfo
- Publication number
- CN102211839A CN102211839A CN 201110071772 CN201110071772A CN102211839A CN 102211839 A CN102211839 A CN 102211839A CN 201110071772 CN201110071772 CN 201110071772 CN 201110071772 A CN201110071772 A CN 201110071772A CN 102211839 A CN102211839 A CN 102211839A
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- China
- Prior art keywords
- treatment
- waste water
- biochemical
- coal chemical
- absorbing unit
- Prior art date
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- 239000002351 wastewater Substances 0.000 title claims abstract description 83
- OKTJSMMVPCPJKN-UHFFFAOYSA-N carbon Chemical compound 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Abstract
The invention relates to a method for treating coal chemical wastewater, which comprises the following steps in turn: pretreatment, biochemical treatment with a first biochemical unit, adsorption treatment with an adsorption unit, sedimentation treatment with a sedimentation tank, and advanced biochemical treatment. The method solves the technical problems of high ozone electric power consumption, high cost and influence on yielding water quality because ozone is used for performing advanced treatment in the method for treating the coal chemical wastewater in the prior art. In the method for treating the coal chemical wastewater, the ozone is not used, resources are saved, and the yielding water quality can be well guaranteed, so the method is particularly suitable for treating the coal chemical wastewater.
Description
Technical field
The present invention relates to a kind of sewage water treatment method, specifically a kind of coal chemical industrial waste water treatment process.
Background technology
Coal Chemical Industry is meant with the coal to be raw material, and making coal conversion through chemical process is gas, liquid and solid phase prod or half product, the industry of then further being processed into chemical industry, energy product, and wastewater discharge is very big in this process.Coal chemical industrial waste water water quality complexity is a kind of trade effluent that typically contains the organic compound of difficult degradation.For coal chemical industrial waste water, handle and be difficult to reach emission standard by physics, physical chemistry, chemical method merely.Usually need just can reach the degree of the requirement of water treatment through the treatment system of forming by several method.
The treatment process of coal gasification waste water divides from function, is broadly divided into pretreatment system, biological treatment system and advanced treatment system.Pretreatment system generally comprises oil removal, air supporting, precipitation, acidication etc.; Biological treatment system mainly is biochemical treatment, and as adopting the biochemical process of routines such as activated sludge process, the general 400-500 mg/L of the water outlet COD after the biochemical treatment mainly is residual bio-refractory organism in the water outlet; The present existent method of advanced treatment system is ozone oxidation method, coagulant sedimentation and Fenton reagent method etc., wherein ozonizer current consumption is bigger, coagulant sedimentation and fenton reagent method need add medicament, and it is serious to make in the processed water that salinity increases, and influences water quality.And the wastewater effluent COD after advanced treatment system is handled generally more than 100mg/L, can not well satisfy wastewater discharge standard, also is difficult to reach the requirement of recycling.
As disclosing a kind of method of chemical industrial park Wastewater Concentrated among the Chinese patent literature CN101381187A, at first carry out pre-treatment through electrolysis, waste water carries out biochemical treatment through high-performance bio flowing bed reactor or intermittent aeration biological particles bed bioreactor then, and last waste water carries out advanced treatment through ozone-active carbon technology.In this technical scheme, what advanced treatment adopted is ozone-active carbon technology, but the current consumption of ozonizer is bigger, need to consume more resource, be unfavorable for save energy, improved the cost of wastewater treatment simultaneously, and the purity of ozone also can be subjected to the restriction of equipment self, thereby influence treatment effect.
Summary of the invention
For this reason, technical problem to be solved by this invention is coal chemical industrial waste water treatment process of the prior art, use ozone to carry out advanced treatment, have that ozone current consumption is big, cost is high, influence the problem of water outlet quality, thereby propose a kind ofly not use ozone, economize on resources, coal chemical industrial waste water treatment process that can fine guarantee water outlet quality.
For solving the problems of the technologies described above, coal chemical industrial waste water treatment process of the present invention may further comprise the steps:
1. pre-treatment: the coal chemical industrial waste water in the wastewater equalization pond is fed pretreatment unit carry out pre-treatment;
2. the first biochemical unit biochemical treatment: pretreated waste water is fed the first biochemical unit carry out biochemical treatment;
3. absorbing unit adsorption treatment: the waste water after the above-mentioned biochemical treatment is fed absorbing unit carry out adsorption treatment, be provided with sorbing material in the described absorbing unit, described waste water is carried out adsorption treatment;
4. settling tank precipitation process: the waste water after the described adsorption treatment is fed settling tank carry out separating of sorbing material and water, described sorbing material is at the pond bottom sediments and give off at the bottom of the pond;
5. deep biochemical is handled: the waste water after the above-mentioned precipitation process is fed the second biochemical unit carry out biochemical treatment, discharge behind the waste water filtering after the described biochemical treatment.
In described absorbing unit, described sorbing material is activated coke or semicoke or activity charcoal powder.
In described absorbing unit, described waste water is that 100:1 is to 1000:1 with the ratio of described sorbing material.
In described absorbing unit, described waste water is 200:1 with the ratio of described sorbing material.
The solution of the sorbing material of discharging is back in the described absorbing unit and reuses at the bottom of the described settling tank pond.
The mass ratio that is back to the flooding quantity of the solution of described sorbing material of described absorbing unit and described absorbing unit is 5:100-200:100.
The mass ratio that is back to the flooding quantity of the solution of described sorbing material of described absorbing unit and described absorbing unit is 50:100.
Described step 5. in, the time of described biochemical treatment is 5-30 hour.
Described step 5. in, the time of described biochemical treatment is 25 hours.
Described step 5. in, the time of described biochemical treatment is 15 hours.
Technique scheme of the present invention has the following advantages compared to existing technology,
(1) coal chemical industrial waste water treatment process of the present invention, comprise pre-treatment, the first biochemical unit biochemical treatment, the absorbing unit adsorption treatment, the settling tank precipitation process, deep biochemical is handled, in this method of wastewater treatment, after pre-treatment and biochemical treatment, adopt adsorption treatment, the mode that precipitation process and deep biochemical are handled is as advanced treatment, owing to can contain the material of a large amount of difficult degradations in the coal chemical industrial waste water, therefore after process pre-treatment and biochemical treatment, the COD water outlet is generally about 400-500mg/L, again after the advanced treatment system of routine is handled waste water the COD of water outlet more than 100mg/L, and the method for wastewater treatment described in the employing invention, coal chemical industrial waste water is after wastewater treatment after process pre-treatment and the biochemical treatment, adsorb the organism of removing macromole difficult degradation in the waste water through adsorption treatment again, further improve the biodegradability of waste water, and then handle can further get rid of by biochemical material in the waste water through deep biochemical, thereby improve the processing efficiency of advanced treatment greatly, make water outlet COD after treatment can be reduced to below the 50mg/L, can reduce more than 50% with the content of COD in the water outlet after the advanced treatment mode of routine is compared processing, in addition, this method need not to add any medicament in waste water, the problem of having avoided adding medicament and having influenced effluent quality is a kind of efficient, the coal chemical industrial waste water treatment process of safety.
(2) coal chemical industrial waste water treatment process of the present invention, in described absorbing unit, described sorbing material is an activated coke, activated coke has good adsorption property, can effectively remove the organic macromolecule material in the waste water, improves the biodegradability of waste water.
(3) coal chemical industrial waste water treatment process of the present invention, in described absorbing unit, described waste water is that 100:1 is to 1000:1 with the ratio of described sorbing material, when this ratio is excessive, the concentration of sorbing material is too low, can not reach good adsorption effect, when this ratio was too small, required sorbing material was too many, had improved the cost of wastewater treatment, sorbing material can not make full use of simultaneously, the waste resource, the preferred 200:1 of ratio of described waste water and described sorbing material can guarantee that the concentration of the sorbing material in the absorbing unit is moderate, absorption property is good, and cost performance is higher.
(4) coal chemical industrial waste water treatment process of the present invention, the solution of the sorbing material of discharging is back in the described absorbing unit and reuses at the bottom of the described settling tank pond, helps save energy, reduces the cost of water treatment.
(5) coal chemical industrial waste water treatment process of the present invention, the mass ratio that is back to the flooding quantity of the solution of described sorbing material of described absorbing unit and described absorbing unit is 5:100-200:100, preferred 50:100 helps to improve the utilization ratio of sorbing material, reduces the cost of water treatment.
(6) coal chemical industrial waste water treatment process of the present invention, described step 5. in, the time of described biochemical treatment is 5-30 hour, but makes the biochemical substances in the waste water get rid of fully, reach treatment effect preferably, the content of COD is reduced to below the 50mg/L in the feasible water outlet after treatment.
Description of drawings
For the easier quilt of content of the present invention is clearly understood, below according to a particular embodiment of the invention and in conjunction with the accompanying drawings, the present invention is further detailed explanation, wherein
Fig. 1 is the schema of an embodiment of coal chemical industrial waste water treatment process of the present invention;
Fig. 2, Fig. 3, Fig. 4 are the schemas of other embodiments of coal chemical industrial waste water treatment process of the present invention.
Embodiment
Embodiment 1
Provided a concrete embodiment of coal chemical industrial waste water treatment process of the present invention as shown in Figure 1, comprised the steps:
1. pre-treatment: the coal chemical industrial waste water in the equalizing tank is fed pretreatment unit carry out pre-treatment, described equalizing tank is used for that coal chemical industrial waste water is carried out homogeneous and all measures adjusting, and described pretreatment unit improves the biodegradability of waste water by modes such as oil removal, air supporting, precipitation, acidications;
2. the first biochemical unit biochemical treatment: pretreated waste water is fed the first biochemical unit carry out biochemical treatment, in the described first biochemical unit, carry out the degraded of organism and ammonia nitrogen, reduce nitrogen element content;
3. absorbing unit adsorption treatment: the waste water after the above-mentioned biochemical treatment is fed absorbing unit carry out adsorption treatment, be provided with sorbing material in the described absorbing unit, described waste water is carried out adsorption treatment, select the coke powder of activated coke at this, new coke powder is added in the absorbing unit, and the waste water in the described absorbing unit and the mass ratio of described activated coke are 200:1;
4. settling tank precipitation process: the waste water after the described adsorption treatment is fed settling tank carry out separating of sorbing material and water, described sorbing material is at the pond bottom sediments and give off at the bottom of the pond, and the top of settling tank is the waste water after precipitation process is separated;
5. deep biochemical is handled: the waste water after the above-mentioned precipitation process is fed the second biochemical unit carry out biochemical treatment, the second biochemical unit herein is an Aerobic Pond, the residence time of biochemical treatment herein is 25 hours, behind the waste water filtering after the described biochemical treatment, discharge, the COD of water outlet is below 50mg/L, go out water colorless, satisfy discharge of wastewater and reuse standard.
Embodiment 2
Fig. 2 has provided another embodiment of coal chemical industrial waste water treatment process of the present invention, comprises the steps:
1. pre-treatment: the coal chemical industrial waste water in the equalizing tank is fed pretreatment unit carry out pre-treatment;
2. the first biochemical unit biochemical treatment: pretreated waste water is fed the first biochemical unit carry out biochemical treatment, in the described first biochemical unit, carry out the degraded of organism and ammonia nitrogen, reduce nitrogen element content;
3. absorbing unit adsorption treatment: the waste water after the above-mentioned biochemical treatment is fed absorbing unit carry out adsorption treatment, be provided with sorbing material in the described absorbing unit, described waste water is carried out adsorption treatment, select the coke powder of activated coke at this, new coke powder is added in the absorbing unit, and the waste water in the described absorbing unit and the mass ratio of described activated coke are 100:1;
4. settling tank precipitation process: the waste water after the described adsorption treatment is fed settling tank carry out separating of activated coke and waste water, described activated coke solution is at the pond bottom sediments and give off at the bottom of the pond, and the stillness of night on settling tank top is the waste water after precipitation process is separated; In the present embodiment, in order to improve the utilization ratio of activated coke, at the bottom of the described settling tank pond solution of the activated coke of discharging some be back in the described absorbing unit and reuse, the mass ratio that is back to the flooding quantity of the solution of described activated coke of described absorbing unit and described absorbing unit herein is 50:100.
5. deep biochemical is handled: the waste water after the above-mentioned precipitation process is fed the second biochemical unit carry out biochemical treatment, the second biochemical unit herein is a BAF, the residence time of biochemical treatment herein is 15 hours, behind the waste water filtering after the described biochemical treatment, discharge, water outlet COD goes out water colorless below 50mg/L, satisfy discharge of wastewater and reuse standard, go out water colorless, satisfy discharge of wastewater and reuse standard.
Embodiment 3
1. pre-treatment: the coal chemical industrial waste water in the equalizing tank is fed pretreatment unit carry out pre-treatment;
2. the first biochemical unit biochemical treatment: pretreated waste water is fed the first biochemical unit carry out biochemical treatment, in the described first biochemical unit, carry out the degraded of organism and ammonia nitrogen, reduce nitrogen element content;
3. absorbing unit adsorption treatment: the waste water after the above-mentioned biochemical treatment is fed absorbing unit carry out adsorption treatment, be provided with sorbing material in the described absorbing unit, described waste water is carried out adsorption treatment, select the coke powder of activated coke at this, new coke powder is added in the absorbing unit, and the waste water in the described absorbing unit and the mass ratio of described activated coke are 1000:1;
4. settling tank precipitation process: the waste water after the described adsorption treatment is fed settling tank carry out separating of activated coke and waste water, described activated coke solution is at the pond bottom sediments and give off at the bottom of the pond, and the stillness of night on settling tank top is the waste water after precipitation process is separated; In the present embodiment, in order to improve the utilization ratio of activated coke, the solution of activated coke of discharging is back in the described absorbing unit and reuses at the bottom of the described settling tank pond, and the mass ratio that is back to the flooding quantity of the solution of described activated coke of described absorbing unit and described absorbing unit herein is 200:100.
5. deep biochemical is handled: the waste water after the above-mentioned precipitation process is fed the second biochemical unit carry out biochemical treatment, the second biochemical unit herein is a biological fluidized bed, the residence time of biochemical treatment herein is 5 hours, behind the waste water filtering after the described biochemical treatment, discharge, water outlet COD goes out water colorless below 50mg/L, satisfy discharge of wastewater and reuse standard, go out water colorless, satisfy discharge of wastewater and reuse standard.
Embodiment 4
1. pre-treatment: the coal chemical industrial waste water in the equalizing tank is fed pretreatment unit carry out pre-treatment;
2. the first biochemical unit biochemical treatment: pretreated waste water is fed the first biochemical unit carry out biochemical treatment, in the described first biochemical unit, carry out the degraded of organism and ammonia nitrogen, reduce nitrogen element content;
3. absorbing unit adsorption treatment: the waste water after the above-mentioned biochemical treatment is fed absorbing unit carry out adsorption treatment, be provided with sorbing material in the described absorbing unit, described waste water is carried out adsorption treatment, select the coke powder of activated coke at this, new coke powder is added in the absorbing unit, and the waste water in the described absorbing unit and the mass ratio of described activated coke are 400:1;
4. settling tank precipitation process: the waste water after the described adsorption treatment is fed settling tank carry out separating of activated coke and waste water, described activated coke solution is at the pond bottom sediments and give off at the bottom of the pond, and the stillness of night on settling tank top is the waste water after precipitation process is separated; In the present embodiment, in order to improve the utilization ratio of activated coke, the solution of activated coke of discharging is back in the described absorbing unit and reuses at the bottom of the described settling tank pond, and the mass ratio that is back to the flooding quantity of the solution of described activated coke of described absorbing unit and described absorbing unit herein is 5:100.
5. deep biochemical is handled: the waste water after the above-mentioned precipitation process is fed the second biochemical unit carry out biochemical treatment, the second biochemical unit herein is a membrane bioreactor, the residence time of biochemical treatment herein is 30 hours, behind the waste water filtering after the described biochemical treatment, discharge, water outlet COD goes out water colorless below 50mg/L, satisfy discharge of wastewater and reuse standard, go out water colorless, satisfy discharge of wastewater and reuse standard.
Obviously, the foregoing description only is for example clearly is described, and is not the qualification to embodiment.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here need not also can't give exhaustive to all embodiments.And conspicuous variation of being extended out thus or change still are among the protection domain of the invention.
Claims (10)
1. a coal chemical industrial waste water treatment process is characterized in that, comprises the steps:
1. pre-treatment: the coal chemical industrial waste water in the wastewater equalization pond is fed pretreatment unit carry out pre-treatment;
2. the first biochemical unit biochemical treatment: pretreated waste water is fed the first biochemical unit carry out biochemical treatment;
3. absorbing unit adsorption treatment: the waste water after the above-mentioned biochemical treatment is fed absorbing unit carry out adsorption treatment, be provided with sorbing material in the described absorbing unit, described waste water is carried out adsorption treatment;
4. settling tank precipitation process: the waste water after the described adsorption treatment is fed settling tank carry out separating of sorbing material and water, described sorbing material is at the pond bottom sediments and give off at the bottom of the pond;
5. deep biochemical is handled: the waste water after the above-mentioned precipitation process is fed the second biochemical unit carry out biochemical treatment, discharge behind the waste water filtering after the described biochemical treatment.
2. coal chemical industrial waste water treatment process according to claim 1 is characterized in that: in described absorbing unit, described sorbing material is activated coke or semicoke or activity charcoal powder.
3. coal chemical industrial waste water treatment process according to claim 1 and 2 is characterized in that: in described absorbing unit, the mass ratio of described waste water and described sorbing material is that 100:1 is to 1000:1.
4. coal chemical industrial waste water treatment process according to claim 3 is characterized in that: in described absorbing unit, described waste water is 200:1 with the ratio of described sorbing material.
5. according to claim 1 or 2 or 4 described coal chemical industrial waste water treatment processs, it is characterized in that: the solution of the sorbing material of discharging is back in the described absorbing unit and reuses at the bottom of the described settling tank pond.
6. according to right 5 described coal chemical industrial waste water treatment processs, it is characterized in that: the mass ratio that is back to the flooding quantity of the solution of described sorbing material of described absorbing unit and described absorbing unit is 5:100-200:100.
7. according to right 6 described coal chemical industrial waste water treatment processs, it is characterized in that: the mass ratio that is back to the flooding quantity of the solution of described sorbing material of described absorbing unit and described absorbing unit is 50:100.
8. according to right 1 or 2 or 4 or 6 or 7 described coal chemical industrial waste water treatment processs, it is characterized in that: described step 5. in, the time of described biochemical treatment is 5-30 hour.
9. according to right 8 described coal chemical industrial waste water treatment processs, it is characterized in that: described step 5. in, the time of described biochemical treatment is 25 hours.
10. according to right 9 described coal chemical industrial waste water treatment processs, it is characterized in that: described step 5. in, the time of described biochemical treatment is 15 hours.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103204602A (en) * | 2012-01-11 | 2013-07-17 | 中国海洋石油总公司 | Coal gasification wastewater processing method |
| CN103693805A (en) * | 2013-12-02 | 2014-04-02 | 陕西煤业化工技术研究院有限责任公司 | Device and method for recycling coal pyrolysis waste |
| CN109052559A (en) * | 2018-08-21 | 2018-12-21 | 谢响玲 | A kind of coal chemical industry wastewater treating method |
| CN109896692A (en) * | 2017-12-08 | 2019-06-18 | 中国石油化工股份有限公司 | A kind of coal-to-olefin and its technique of sewage treatment coupling |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101857331A (en) * | 2010-06-10 | 2010-10-13 | 哈尔滨瑞格能源环境技术发展有限责任公司 | Coal chemical industry wastewater zero emission treatment method and system |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101857331A (en) * | 2010-06-10 | 2010-10-13 | 哈尔滨瑞格能源环境技术发展有限责任公司 | Coal chemical industry wastewater zero emission treatment method and system |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103204602A (en) * | 2012-01-11 | 2013-07-17 | 中国海洋石油总公司 | Coal gasification wastewater processing method |
| CN103693805A (en) * | 2013-12-02 | 2014-04-02 | 陕西煤业化工技术研究院有限责任公司 | Device and method for recycling coal pyrolysis waste |
| CN103693805B (en) * | 2013-12-02 | 2014-12-10 | 陕西煤业化工技术研究院有限责任公司 | Device and method for recycling coal pyrolysis waste |
| CN109896692A (en) * | 2017-12-08 | 2019-06-18 | 中国石油化工股份有限公司 | A kind of coal-to-olefin and its technique of sewage treatment coupling |
| CN109052559A (en) * | 2018-08-21 | 2018-12-21 | 谢响玲 | A kind of coal chemical industry wastewater treating method |
| CN109052559B (en) * | 2018-08-21 | 2021-09-03 | 安徽昊源化工集团有限公司 | Coal chemical wastewater treatment method |
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