CN1143831C - Method of treating waste water from cane sugar rfinery completely - Google Patents
Method of treating waste water from cane sugar rfinery completely Download PDFInfo
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- CN1143831C CN1143831C CNB001129503A CN00112950A CN1143831C CN 1143831 C CN1143831 C CN 1143831C CN B001129503 A CNB001129503 A CN B001129503A CN 00112950 A CN00112950 A CN 00112950A CN 1143831 C CN1143831 C CN 1143831C
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- water
- waste water
- useless mash
- mash
- alcohol
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Abstract
The present invention provides a method for thoroughly treating waste water form sucrose mills. The present invention comprises the technologic steps that the water waste is neutralized and de-dusted by using a water film; partial neutralized waste water is cooled and deposited and then used as a diluting agent. The present invention is characterized in that excessive waste water obtained after dust removal by using the water film is circulated and is diluted by using washing filter cloth water; the waste water is conventionally processed; the dilution ratio of the washing filter cloth water to the waste water is 10:1 to 4. The present invention uses the existing equipment and technology of sugar mills, and investment does not need to be increased; thus, the processed waste water can achieve discharge standards and does not pollute environment; possibly, the processed waste water is recycled so as to save valuable water resources. Besides, solid material obtained through treatment can be used as an ideal fertilizer, and thus, the pollution image of the sugar mills is thoroughly changed.
Description
Technical field
The present invention relates to a kind of method of handling the waste water such as alcohol waste mash of cane mill's discharging, the particularly a kind of method that can thoroughly administer this alcohol waste mash.
Background technology
Cane mill almost each road production process all be unable to do without water, its water of productive use draws from the korneforos mostly, the waste water of Chan Shenging enters the korneforos again conversely, these waste water mainly comprise three kinds in alcohol waste mash, filter wash water distribution and water film dedusting water, wherein low owing to alcohol waste mash pH value, temperature is high, big being difficult to of concentration administered, therefore, its discharging has caused great pollution to rivers.Moreover alcohol waste mash also contains element and organism such as nitrogen, phosphorus, potassium except that having These characteristics, therefore environment not only polluted in its discharging, but also wasted valuable resource.For administering these waste water of cane mill, people once worked out the method for many improvement.As the liquid fertilizer method---directly the liquid fertilizer as the sugarcane field uses; Diluting agricultural filling method---the alcohol waste mash after being about to dilute is used for the farmland pouring; Oxidation pond process---promptly in the pond, put into a large amount of alcohol waste mashs, weaken pollution load, discharging again after the dilution when waiting arrive rainy season by natural anaerobism, aerobic, sedimentation; The feedstuff protein method---promptly, obtain feedstuff protein by behind the art breading alcohol waste mash; The anaerobic methane production method---promptly alcohol waste mash is carried out making it to produce after the anaerobic treatment biogas as the energy; Evaporation concentration method---promptly adopt multiple-effect evaporation to concentrate the back and reclaim heat and sylvite ash.What these methods had can administer the waste water in sugar refinery, but increase investment, though have can keep certain investment, can not thoroughly administer, and it is far from being enough only the alcohol waste mash of cane mill being handled, because the pollution load of filter wash water distribution still can not be ignored.For this reason, people go research towards the direction of the comprehensive regulation, strive reaching the treatment of wastes with processes of wastes against one another, the purpose of not discharging.As Chinese patent disclosed " alcohol waste liquid for sugar refinery recycle method (application number is 92110207.0) ", and " handle the method (application number is 96107899.5) of alcohol slops etc.; the former utilizes alcohol waste mash instead of part water as the molasses thinner; latter's recycle alcohol waste mash replaces clear water to be used for water film dedusting; though effectively reduced the quantity discharged of alcohol waste mash; but also rationally utilized water resources, realize multi-purpose water.But the superfluous alcohol waste mash after above-mentioned the recycling still can not directly discharge, and the just constantly increase of its amount, and therefore, prior art still can not fully, thoroughly be eliminated the alcohol waste mash pollution on the environment.
Summary of the invention
The object of the present invention is to provide a kind of investment that need not to increase again, utilize existing installation just can thoroughly administer the method for alcohol waste mash.
The present invention utilizes existing Apparatus and method for to finish the following step:
A, after the useless mash of discharging between alcohol-fueled car entered neutralization tank, adding alkali, to be neutralized to pH be 6.0--9.0, and the useless mash of getting after the neutralization 20% (volume ratio, as follows) is sent into the cooling settling tank, and the cooling post precipitation is got supernatant liquor and is returned between alcohol-fueled car thinner as molasses;
B after the useless mash (80%) after all the other neutralizations is sent into equalizing tank, replaces clear water to be used for water film dedusting, under the high temperature evaporation and lime-ash adsorption of stack gas, reduce the CODcr load 50% of useless mash, the useless mash after the cooling dedusting enters ash settling basin, and recirculation is used for water film dedusting after the sedimentation;
D, the filter wash water distribution that produces the discharge of sugared workshop is through the settling tank post precipitation, carry out conventional water treatment, promptly be introduced into biochemical system, by anaerobism, aerobic treatment, remove the pollutent of 80-85%, enter the materialization system again, waste water is further removed in the materialization system that integrates coagulation, air supporting, separation, filters depollute, then water outlet can reach emission standard;
The invention is characterized in the pollutent that utilizes following method thoroughly to administer alcohol waste mash:
C is used for circulation in the B step to carry out conventional water treatment again after excessive useless mash behind the water film dedusting dilutes with the filter wash water distribution, and its thinning ratio is:
Filter wash water distribution: useless mash=10: 1-4.
Owing to contain a large amount of alcoholic contents and the glue in the sugarcane epidermis (cured) plastid in the alcohol waste mash, and do not possess the biochemical treatment performance, therefore, can't carry out biochemical treatment.But after alcohol waste mash replacement clear water circulates repeatedly and is used for water film dedusting, a large amount of alcoholic contents are wherein evaporated by high-temperature flue gas, glue (cured) plastid is by the lime-ash in the flue gas (gac etc.) absorption, therefore becomes the useless mash that can carry out biochemical treatment and is able to thorough improvement.Water quality after the improvement reaches emission standard, and one can directly discharge, and two can return on the production line and to utilize once more and do not efflux.
Utilize the present invention's method to handle alcohol waste mash, can utilize the existing boiler in sugar refinery, water dust scrubber, neutralization tank, equalizing tank, settling tank, biochemical treatment system, materialization treatment system etc., need not to increase investment, the waste water that can make processing reaches emission standard and is free from environmental pollution, perhaps utilize and the water resources of saves valuable once more, the solid material of handling gained simultaneously can be used as the ideal chemical fertilizer, its economic benefit and social benefit are very obvious, therefore, method of the present invention can thoroughly change the pollution image in sugar refinery.
Embodiment
Fig. 1 is the present invention's process flow sheet.
Embodiment 1
Working condition: pressing sugarcane with sugar refinery day is example for 1000 tons, needs supporting boiler 25T/h, about 200 ℃ of boiler flue gas outlet temperature, and supporting water dust scrubber, its normal water loss is 25M
3/ h, corresponding alcohol output is 12M
3/ d, the useless mash of generation is 170M
3/ d, in addition, also having the filter wash cloth water yield is 150M
3/ d.
Processing step:
1, with the 170M that discharges between alcohol-fueled car
3After useless mash is sent into neutralization tank, add in the lime and pH to 6.0, get the useless mash 34M after the neutralization
3Send into the cooling settling tank, the cooling post precipitation is got supernatant liquor and is returned the thinner that is used as molasses between alcohol-fueled car;
2, remaining 136M
3After the useless mash of neutralization is sent into equalizing tank, with 25M
3/ h replaces clear water to be used for water film dedusting, makes the CODcr load of useless mash reduce 50%, and the useless mash after the cooling dedusting enters ash settling basin, returns in the equalizing tank after multistage sedimentation, so that circulation is used for water film dedusting again;
3, the excessive useless mash that above-mentioned circulation is used for behind the water film dedusting is sent into the filter wash water distribution dilution of settling tank back, and its thinning ratio is:
Filter wash water distribution: useless mash=10: 1
4, with the dilution after mixed solution through the settling tank post precipitation, carry out conventional water treatment, promptly be introduced into biochemical system, by anaerobism, aerobic treatment, remove the pollutent of 80-85%, enter the materialization system again, waste water is further removed in the materialization system that integrates coagulation, air supporting, separation, filters depollute, then water outlet can reach emission standard, can directly discharge, but also the backspace production plant utilizes once more.
Embodiment 2
Working condition embodiment 1 is identical.
1, with the 170M that discharges between alcohol-fueled car
3After useless mash is sent into neutralization tank, add in the lime and pH to 9.0, get the useless mash 34M after the neutralization
3) send into the cooling settling tank, the cooling post precipitation is got supernatant liquor and is returned the thinner that is used as molasses between alcohol-fueled car;
2 steps are with embodiment 1;
3, the excessive useless mash that above-mentioned circulation is used for behind the water film dedusting is sent into the filter wash water distribution dilution of settling tank back, and its thinning ratio is:
Filter wash water distribution: useless mash=10: 4
4 steps are identical with embodiment 1.
Embodiment 3
Working condition is identical with embodiment 1,
1, with the 170M that discharges between alcohol-fueled car
3After useless mash is sent into neutralization tank, add in the lime and pH to 8.0, get the useless mash 34M after the neutralization
3) send into the cooling settling tank, the cooling post precipitation is got supernatant liquor and is returned the thinner that is used as molasses between alcohol-fueled car;
2 steps are with embodiment 1;
3, the excessive useless mash that above-mentioned circulation is used for behind the water film dedusting is sent into the filter wash water distribution dilution of settling tank back, and its thinning ratio is:
Filter wash water distribution: useless mash=10: 3
4 steps are identical with embodiment 1.
Claims (1)
1, a kind of method of thorough improvement waster water of cane mill is characterized in that it comprises following process steps:
A, after the useless mash of discharging between alcohol-fueled car entered neutralization tank, adding alkali, to be neutralized to pH be 6.0--9.0, gets volume ratio after the neutralization and be 20% useless mash and send into the cooling settling tank, the cooling post precipitation is got supernatant liquor and is returned between alcohol-fueled car thinner as molasses;
B, volume ratio after all the other neutralizations is after 80% useless mash is sent into equalizing tank, replace clear water to be used for water film dedusting, under the high temperature evaporation and lime-ash adsorption of stack gas, reduce the CODcr load 50% of useless mash, useless mash after the cooling dedusting enters ash settling basin, and recirculation is used for water film dedusting after the sedimentation;
C, circulation in the B step is used for excessive useless mash behind the water film dedusting with producing the filter wash water distribution dilution of discharging in sugared workshop, its thinning ratio is: the filter wash water distribution: useless mash=10: 1-4, through the settling tank post precipitation, carry out conventional water treatment, promptly be introduced into biochemical system, by anaerobism, aerobic treatment, remove the pollutent of 80-85%, enter the materialization system again, waste water is further removed in the materialization system that integrates coagulation, air supporting, separation, filters depollute, then water outlet can reach emission standard.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB001129503A CN1143831C (en) | 2000-05-18 | 2000-05-18 | Method of treating waste water from cane sugar rfinery completely |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB001129503A CN1143831C (en) | 2000-05-18 | 2000-05-18 | Method of treating waste water from cane sugar rfinery completely |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1324770A CN1324770A (en) | 2001-12-05 |
| CN1143831C true CN1143831C (en) | 2004-03-31 |
Family
ID=4582770
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB001129503A Expired - Fee Related CN1143831C (en) | 2000-05-18 | 2000-05-18 | Method of treating waste water from cane sugar rfinery completely |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1143831C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102139997B (en) * | 2011-05-04 | 2012-07-04 | 云南康泰环保科技有限公司 | Three-level biological purification process for disposing terminal waste water from sugar refinery |
| CN103193366B (en) * | 2013-05-04 | 2014-06-18 | 郑州大学 | Integrated treatment method of corn alcohol wastewater |
| CN104193070B (en) * | 2014-09-26 | 2015-10-28 | 李仕全 | A kind of liquid waste treating apparatus of cane sugar factory |
| CN105906136B (en) * | 2015-11-03 | 2018-11-13 | 云南全成环境工程有限公司 | Brewing spirit high concentration wastewater treatment method |
-
2000
- 2000-05-18 CN CNB001129503A patent/CN1143831C/en not_active Expired - Fee Related
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| Publication number | Publication date |
|---|---|
| CN1324770A (en) | 2001-12-05 |
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