CN104860467A - Method for recycling coal tar, ammonia and phenol in semi-coke wastewater - Google Patents
Method for recycling coal tar, ammonia and phenol in semi-coke wastewater Download PDFInfo
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- CN104860467A CN104860467A CN201510277056.6A CN201510277056A CN104860467A CN 104860467 A CN104860467 A CN 104860467A CN 201510277056 A CN201510277056 A CN 201510277056A CN 104860467 A CN104860467 A CN 104860467A
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Abstract
The invention discloses a method for recycling coal tar, ammonia and phenol in semi-coke wastewater. The method comprises the steps of coarse filtration, membrane filtration, coal tar recovery, phenol recovery and ammonia recovery. Through a combined treatment process of processes of membrane filtration, coal tar recovery, ammonia removal, phenol removal and the like, recycling of the coal tar in the semi-coke wastewater is realized, most pollutants in the semi-coke wastewater are removed, the subsequent treatment effect of the semi-coke wastewater is ensured, and conditions are provided for subsequent deep treatment of the semi-coke wastewater.
Description
Technical field
The invention belongs to the field for the treatment of of water pollution of environmental engineering, more specifically refer to the recoverying and utilizing method of coal tar and ammonia phenol in a kind of blue charcoal waste water.
Background technology
Blue charcoal waste water is the trade effluent that a kind of intractability is larger, usually has the features such as complicated component, Pollutant levels are high, stable in properties.Inorganic pollutant in blue charcoal waste water mainly contains sulfide, prussiate, ammonia nitrogen and thiocyanide etc.; Organic pollutant is based on coal tar oily substance, and the content of phenolic compound is very high, in addition, and the aromatics also containing many rings and nitrogenous, sulphur, oxygen heterogeneous ring compound etc.
The water quality characteristics of blue charcoal waste water determines the hazardness of its complexity.Such as, wherein there is grave danger to ecotope in contained ammonia nitrogen, phenolic compound and aromatics.In addition, the industry byproduct such as coal tar, ammonia, phenol in blue charcoal waste water also has the value of recycling.
Summary of the invention
The invention provides the recoverying and utilizing method of coal tar and ammonia phenol in a kind of blue charcoal waste water, its main purpose is to overcome the inadequate technical deficiency of the existing blue charcoal wastewater treatment degree of depth, and the shortcoming such as the technology vacancy simultaneously reclaiming tar, ammonia and phenol in blue charcoal waste water.
The present invention adopts following technical scheme:
A recoverying and utilizing method for coal tar and phenol in blue charcoal waste water, comprises the following steps:
(1) coarse filtration: be 10000 ~ 75000mg/L by COD, ammonia nitrogen be 500 ~ 5000mg/L, total phenol is 1000 ~ 6000mg/L, colourity is 10000 ~ 30000 times, pH value be 8 ~ 10 blue charcoal waste water carry out coarse filtration through grid or screen cloth, removing macrobead foreign material;
(2) membrane filtration: must be rich in the concentrated solution of coal tar and the dialyzate of removing coal tar through membrane filtration after adding acid adjustment its pH to 2 ~ 6 breakdown of emulsion through the blue charcoal waste water of step (1) coarse filtration removing macrobead thing, cycles of concentration is 3 ~ 10 times;
(3) coal tar oil recovery: step (2) must be rich in the concentrated solution of coal tar through membrane filtration through gravity settling separation or centrifugation, obtain coal tar and the detar waste water of recovery;
(4) phenol reclaims: step (2) membrane filtration gained removing coal tar dialyzate and the blue charcoal waste water of step (3) coal tar oil recovery gained detar are mixed, add acid solution and regulate its pH value to 2 ~ 6, add extraction agent extracting and separating and obtain crude phenols and the blue charcoal waste water of dephenolize;
(5) recovery ammonia: the blue charcoal waste water of step (4) phenol recovery gained dephenolize is added alkaline solution and regulates its pH value to 10 ~ 12, heating evaporation removing ammonia, ammonia absorbs through persulfate solution to be produced ammonium sulfate or obtains liquefied ammonia and deamination orchid charcoal waste water through cooling liquid.
The one that acid for adjusting pH value acid used is sulfuric acid, hydrochloric acid, nitric acid or phosphoric acid is added described in step (2) membrane filtration; The best is sulfuric acid.
Extraction described in step (4) dephenolize extraction agent used is kerosene, mibk, N, N
,-dimethyl-g yl acetamide (N, N
,-503), the one of tributyl phosphate, isopropyl ether, N-BUTYL ACETATE or crude benzol or its mixture.
Optimum extractant heptyl ethanamide (N, N that extraction described in step (4) dephenolize is used
,-503) with the mixture of benzene.
Extraction described in step (4) dephenolize optimum extractant used is N, N
,-dimethyl-g yl acetamide (N, N
,-503) with the mixture of kerosene.
Extraction described in step (4) dephenolize optimum extractant used is the 20-30% mixture of tributyl phosphate and benzene.
Extraction described in step (4) dephenolize optimum extractant used is tributyl phosphate and the 25-33% mixture with kerosene.
Described tar reclaims can reclaim 10 ~ 40kg tar from every cube of Milan charcoal waste water, and makes the COD clearance in waste water reach 30 ~ 55%.
Described phenol reclaims can reclaim 1 ~ 6kg crude phenols from every cube of Milan charcoal waste water, and makes the COD clearance in waste water reach 35 ~ 70%.
Compared to the prior art, tool has the following advantages in the present invention:
(1) by membrane filtration, tar is concentrated in concentrated solution, has both drastically reduce the area the acid amount that adjust ph is used, save production cost, drastically reduce the area again the volume of gravity settling basin or the quantity of whizzer, significantly reduce investment outlay.
(2) not only achieve the recycling of coal tar in blue charcoal waste water, and ensure that the effect of follow-up blue charcoal wastewater treatment.
(3) dialyzate of membrane filtration gained and the detar waste water mixing of coal tar oil recovery gained, then add acid for adjusting pH, extracting and separating, crude phenols and the blue charcoal waste water of dephenolize can be obtained, realize the recycling of blue charcoal Phenol for Waste Water, every cubic metre of recyclable 1 ~ 6kg of waste water.
(4) the blue charcoal waste water of the deamination of dephenolize gained can remove ammonia after overregulating pH, heating evaporation, can realize process and the recycling of blue charcoal ammonia in wastewater.
(5), after the recovery of ammonia being placed on the recovery process of phenol, every cubic metre of waste water can reduce adjustment pH alkali 9 ~ 11kg, significantly reduces production cost.
(6) by the combined treatment process of the processes such as membrane filtration, coal tar recovering, deamination, dephenolize, most of pollutent of blue charcoal waste water is removed, for the successive depths process of blue charcoal waste water provides condition.
Accompanying drawing explanation
Fig. 1 is process flow sheet of the present invention.
Embodiment
The present invention is based on the composition of blue charcoal waste water, character and existing processing scheme, devise the recoverying and utilizing method of coal tar and phenol in a kind of blue charcoal waste water, it relates to the combined treatment process of the processes such as coarse filtration, membrane filtration, coal tar oil recovery, phenol recovery, recovery ammonia, thus formed a kind of can the method for coal tar and ammonia phenol in the blue charcoal waste water of efficient recovery, and provide technical parameter for the process of blue charcoal waste water successive depths.
Referring to Fig. 1, the specific embodiment of the present invention is described.
embodiment 1
The recoverying and utilizing method of coal tar and ammonia phenol in certain blue charcoal waste water.
(1) coarse filtration: be 10000mg/L by COD, ammonia nitrogen be 500mg/L, total phenol is 1000mg/L, colourity is 10000 times, pH value be 8.0 blue charcoal waste water carry out coarse filtration through grid or screen cloth, removing macrobead foreign material.
(2) membrane filtration: the blue charcoal waste water through step (1) coarse filtration removing macrobead thing is added sulfuric acid and regulates its pH value to 2 ~ 6, must be rich in the concentrated solution of coal tar and the dialyzate of removing coal tar through membrane filtration, cycles of concentration is 10 times.
Described membrane filtration is ceramic membrane filter, and the ceramic membrane element aperture of ceramic membrane filter system is 20 ~ 100nm; Operating pressure is 3 ~ 6bar, and temperature is 15 ~ 55 DEG C.
(3) coal tar oil recovery: the concentrated solution that step (2) must be rich in coal tar through membrane filtration, through gravity settling separation, obtains coal tar and the detar waste water of recovery.
Described gravity settling separation pumps in gravity settling basin by the concentrated solution being rich in coal tar, and be the coal tar of lower floor and the decoking waste water on upper strata through gravity settling separation, the coal tar of lower floor reclaims through recovery tube.
Described tar reclaims can reclaim 10kg tar from every cube of Milan charcoal waste water, and the clearance in blue charcoal waste water reaches 30 ~ 55%.
(4) phenol reclaims: step (2) membrane filtration gained dialyzate and step (3) tar are reclaimed the blue charcoal waste water mixing of gained, add acid solution and regulate its pH value to 2 ~ 6, adds extraction agent extracting and separating and obtains crude phenols and the blue charcoal waste water of dephenolize.
Described extraction agent is N, N
,-dimethyl-g yl acetamide (N, N
,-503) with the mixture of kerosene 25%.
Described phenol reclaims can reclaim 1kg crude phenols from every cube of Milan charcoal waste water, and makes the COD clearance in waste water reach 35 ~ 70%.
(5) recovery ammonia: the blue charcoal waste water that step (4) phenol reclaims gained is added alkaline solution, regulates its pH value to 10 ~ 12, heating evaporation removing ammonia, ammonia absorbs through persulfate solution to be produced ammonium sulfate or obtains liquefied ammonia and the blue charcoal waste water of deamination through cooling liquid.
Step (5) described alkaline solution is the one of sodium hydroxide, potassium hydroxide or sodium carbonate.
Described recovery ammonia can reclaim 0.5kg ammonia from every cube of Milan charcoal waste water.
embodiment 2
The recoverying and utilizing method of coal tar and ammonia phenol in certain blue charcoal waste water.
(1) coarse filtration: be 75000mg/L by COD, ammonia nitrogen be 5000mg/L, total phenol is 6000mg/L, colourity is 30000 times, pH value be 10 blue charcoal waste water carry out coarse filtration through grid or screen cloth, removing macrobead foreign material.
(2) membrane filtration: the blue charcoal waste water through step (1) coarse filtration removing macrobead thing is added hydrochloric acid and regulates its pH to 2 ~ 6, must be rich in the concentrated solution of coal tar and the dialyzate of removing coal tar through membrane filtration, cycles of concentration is 3 times.；
Described membrane filtration is metal membrane filter, and the metallic membrane element aperture of metal membrane filter system is 30 ~ 100nm; Operating pressure is 3 ~ 6bar, and temperature is 15 ~ 55 DEG C.
(3) coal tar oil recovery: will must be rich in the concentrated solution of coal tar through centrifugation through step (2) membrane filtration, obtains coal tar and the detar waste water of recovery.
Described centrifugation pumps in whizzer by the concentrated solution being rich in coal tar, and be the coal tar of lower floor and the decoking waste water on upper strata through centrifugation, the coal tar of lower floor reclaims through recovery tube; The centrifugal force of centrifugation is 2200 ~ 4000, and the centrifugal force of best centrifugation is 3200 ~ 3600.
Described tar reclaims can reclaim 40kg tar from every cube of Milan charcoal waste water, and makes the COD clearance in waste water reach 30 ~ 55%.
(4) phenol reclaims: step (2) membrane filtration gained dialyzate and step (3) tar are reclaimed the blue charcoal waste water mixing of gained detar, add acid solution and regulate its pH value to 2 ~ 6, adds extraction agent extracting and separating and obtains crude phenols and the blue charcoal waste water of dephenolize.
Described extraction agent is the mixture of kerosene and tributyl phosphate.
Described phenol reclaims can reclaim 5.9kg crude phenols from every cube of Milan charcoal waste water, and makes the COD clearance in waste water reach 35 ~ 70%.
(5) recovery ammonia: the blue charcoal waste water that step (4) phenol reclaims gained is added alkaline solution, regulates its pH value to be 10 ~ 12, heating evaporation removing ammonia, ammonia absorbs through persulfate solution to be produced ammonium sulfate or obtains liquefied ammonia and the blue charcoal waste water of deamination through cooling liquid.
Step (5) described alkaline solution is sodium hydroxide.
Described recovery ammonia can reclaim 0.5 ~ 6kg ammonia from every cube of Milan charcoal waste water, and makes 3.3 ~ 3.5 times of the COD decline ammonia density in waste water.
embodiment 3
The recoverying and utilizing method of coal tar and ammonia phenol in certain blue charcoal waste water.
(1) coarse filtration: be 75000mg/L by COD, ammonia nitrogen be 5000mg/L, total phenol is 6000mg/L, colourity is 30000 times, pH value be 10 blue charcoal waste water carry out coarse filtration through grid or screen cloth, removing macrobead foreign material.
(2) membrane filtration: the blue charcoal waste water through step (1) coarse filtration removing macrobead thing is added nitric acid and regulates its pH value to 2 ~ 6, must be rich in the concentrated solution of coal tar and the dialyzate of removing coal tar through membrane filtration, cycles of concentration is 3 times.
Described membrane filtration is ceramic membrane filter, and the ceramic membrane element aperture of ceramic membrane filter system is 20 ~ 100nm; Operating pressure is 3 ~ 6bar, and temperature is 15 ~ 55 DEG C.
(3) coal tar oil recovery: will must be rich in the concentrated solution of coal tar through step (2) membrane filtration, through centrifugation, obtains coal tar and the detar waste water of recovery.
Described centrifugation pumps in whizzer by the concentrated solution being rich in coal tar, and be the coal tar of lower floor and the decoking waste water on upper strata through centrifugation, the coal tar of lower floor reclaims through recovery tube; The centrifugal force of centrifugation is 3219.
It is reclaim 40.1kg tar from every cube of Milan charcoal waste water that described tar reclaims, and makes the COD clearance in waste water reach 30 ~ 55%.
(4) phenol reclaims: step (2) membrane filtration gained dialyzate and step (3) tar are reclaimed the blue charcoal waste water mixing of gained detar, add acid solution and regulate its pH value to 2 ~ 6, adds extraction agent extracting and separating and obtains crude phenols and the blue charcoal waste water of dephenolize.
Described extraction agent is kerosene and N, N
,-dimethyl-g yl acetamide (N, N
,-503) mixture.
It is reclaim 6kg crude phenols from every cube of Milan charcoal waste water that described phenol reclaims, and makes the COD clearance in waste water reach 35 ~ 70%.
(5) recovery ammonia: the blue charcoal waste water of dephenolize step (4) phenol being reclaimed gained adds alkaline solution, regulate its pH value to 10 ~ 12, heating evaporation removing ammonia, ammonia absorbs through persulfate solution to be produced ammonium sulfate or obtains liquefied ammonia and the blue charcoal waste water of deamination through cooling liquid.
Step (5) described alkaline solution is the one of sodium hydroxide, potassium hydroxide or sodium carbonate.
Described recovery ammonia reclaims 6kg ammonia from every cube of Milan charcoal waste water, and make 3.3 ~ 3.5 times of the COD decline ammonia density in waste water.
embodiment 4
The recoverying and utilizing method of coal tar and ammonia phenol in certain blue charcoal waste water.
(1) coarse filtration: be 4967mg/L by COD, ammonia nitrogen be 1911mg/L, total phenol is 5962mg/L, colourity is 23000 times, pH value be 10 blue charcoal waste water carry out coarse filtration through grid or screen cloth, removing macrobead foreign material;
(2) membrane filtration: the blue charcoal waste water through step (1) coarse filtration removing macrobead thing is added phosphoric acid and regulates its pH value to 2 ~ 6, must be rich in the concentrated solution of coal tar and the dialyzate of removing coal tar through membrane filtration, cycles of concentration is 6 times;
Described membrane filtration is metal membrane filter, and the metallic membrane element aperture of metal membrane filter system is 30 ~ 100nm; Operating pressure is 3 ~ 6bar, and temperature is 15 ~ 55 DEG C.
(3) coal tar oil recovery: the concentrated solution that step (2) must be rich in coal tar through membrane filtration, through gravity settling separation, obtains coal tar and the detar waste water of recovery;
Described gravity settling separation pumps in gravity settling basin by the concentrated solution being rich in coal tar, and be the coal tar of lower floor and the decoking waste water on upper strata through gravity settling separation, the coal tar of lower floor reclaims through recovery tube.
Described tar reclaims can reclaim 17.6kg tar from every cube of Milan charcoal waste water, and makes the COD clearance in waste water reach 30 ~ 55%.
(4) phenol reclaims: step (2) membrane filtration gained dialyzate and step (3) tar are reclaimed the blue charcoal waste water mixing of gained detar, add acid solution and regulate its pH to 2 ~ 6, adds extraction agent extracting and separating and obtains crude phenols and the blue charcoal waste water of dephenolize.
Described extraction agent is the mixture of 25% tributyl phosphate and kerosene.
It is reclaim 5.93kg crude phenols from every cube of Milan charcoal waste water that described phenol reclaims, and makes the COD clearance in waste water reach 35 ~ 70%.
(5) recovery ammonia: the blue charcoal waste water of dephenolize step (4) phenol being reclaimed gained adds alkaline solution, regulate its pH value to 10 ~ 12, heating evaporation removing ammonia, ammonia absorbs through persulfate solution to be produced ammonium sulfate or obtains liquefied ammonia and the blue charcoal waste water of deamination through cooling liquid.
Step (5) described alkaline solution is 10% potassium hydroxide solution.
Described recovery ammonia can reclaim 0.5 ~ 6kg ammonia from every cube of Milan charcoal waste water, and makes 3.3 ~ 3.5 times of the COD decline ammonia density in waste water.
embodiment 5
The recoverying and utilizing method of coal tar and ammonia phenol in certain blue charcoal waste water.
(1) coarse filtration: be 34967mg/L by COD, ammonia nitrogen be 1911mg/L, total phenol is 4526mg/L, colourity is 25400 times, pH value be 8.9 blue charcoal waste water carry out coarse filtration through grid or screen cloth, removing macrobead foreign material.
(2) membrane filtration: the blue charcoal waste water through step (1) coarse filtration removing macrobead thing is added sulfuric acid and regulates its pH value to 3 ~ 5, must be rich in the concentrated solution of coal tar and the dialyzate of removing coal tar through membrane filtration, cycles of concentration is 4 times;
(3) coal tar oil recovery: pump in whizzer by the concentrated solution that step (2) membrane filtration gained is rich in coal tar, through centrifugation, the coal tar of lower floor and the decoking waste water on upper strata, the coal tar of lower floor is through reclaiming to obtain coal tar 17.6kg/m
3.The centrifugal force of centrifugation is 3219.
(4) phenol reclaims: the blue charcoal waste water after being reclaimed by step (3) tar adds extraction agent extracting and separating and obtains crude phenols and the blue charcoal waste water of dephenolize.
Described extraction agent is N, N
,-dimethyl-g yl acetamide (N, N
,-503) with the mixture of kerosene.
The organic phase of described extraction is stripped through 10% sodium hydroxide solution, and inorganic phase is through being separated to obtain crude phenols 4.42kg/m
3, organic phase is N, N
,-dimethyl-g yl acetamide (N, N
,-503) with the mixture of kerosene, recycle.
After described dephenolize, the pollutent index of blue charcoal waste water is: COD is 8819mg/L, and ammonia nitrogen is 2201mg/L, total phenol is 321mg/L, colourity is 500 times.
(5) recovery ammonia: the blue charcoal waste water after step (4) dephenolize is added sodium hydroxide solution and regulates its pH to 10, heating evaporation removing ammonia, ammonia absorbs through persulfate solution produces ammonium sulfate.
After described deamination, the pollutent index of blue charcoal waste water is: COD is 1695mg/L, and ammonia nitrogen is 44.9mg/L, total phenol is 215mg/L, colourity is 500 times.
embodiment 6
The recoverying and utilizing method of coal tar and ammonia phenol in certain blue charcoal waste water.
(1) coarse filtration: be 34967mg/L by COD, ammonia nitrogen be 1911mg/L, total phenol is 5200mg/L, colourity is 23000 times, pH value be 8.3 blue charcoal waste water carry out coarse filtration through grid or screen cloth, removing macrobead foreign material.
(2) membrane filtration: the blue charcoal waste water through step (1) coarse filtration removing macrobead thing is added nitric acid and regulates its pH value to 2 ~ 6, must be rich in the concentrated solution of coal tar and the dialyzate of removing coal tar through membrane filtration, cycles of concentration is 4 times;
(3) coal tar oil recovery: by the concentrated solution being rich in coal tar after step (3) membrane filtration, through gravity settling separation, obtains coal tar and the detar waste water of recovery.
Described gravity settling separation be by membrane filtration after the concentrated solution being rich in coal tar pump in gravity separation pond, the coal tar of lower floor and the decoking waste water on upper strata, the coal tar of lower floor is through reclaiming to obtain coal tar 17.4kg/m
3.
(4) phenol reclaims: the blue charcoal waste water after being reclaimed by step (3) tar adds extraction agent extracting and separating and obtains crude phenols 4.9kg/m
3charcoal waste water blue with dephenolize.
Described extraction extraction agent used is mibk.
After described dephenolize, the pollutent index of blue charcoal waste water is: COD is 8791mg/L, and ammonia nitrogen is 2252mg/L, total phenol is 211mg/L, colourity is 500 times.
(5) recovery ammonia: the blue charcoal waste water of the recovery gained of step (4) phenol is added sodium hydroxide solution and regulate pH to 10, heating evaporation removing ammonia, ammonia absorbs to obtain ammoniacal liquor through water absorbent solution, or obtains liquefied ammonia and the blue charcoal waste water of deamination through cooling liquid.
After described deamination, the pollutent index of blue charcoal waste water is: COD is 1703mg/L, and ammonia nitrogen is 54.5mg/L, total phenol is 201mg/L, colourity is 500 times.
Above are only the specific embodiment of the present invention, but design concept of the present invention is not limited thereto, all changes utilizing this design the present invention to be carried out to unsubstantiality, all should belong to the behavior of invading scope.
Claims (9)
1. the recoverying and utilizing method of coal tar and ammonia phenol in blue charcoal waste water, is characterized in that, comprise the steps:
(1) coarse filtration: be 10000 ~ 75000mg/L by COD, ammonia nitrogen be 500 ~ 5000mg/L, total phenol is 1000 ~ 6000mg/L, colourity is 10000 ~ 30000 times, pH value be 8 ~ 10 blue charcoal waste water carry out coarse filtration through grid or screen cloth, removing macrobead foreign material;
(2) membrane filtration: must be rich in the concentrated solution of coal tar and the dialyzate of removing coal tar through membrane filtration after adding acid adjustment its pH to 2 ~ 6 breakdown of emulsion through the blue charcoal waste water of step (1) coarse filtration removing macrobead thing, cycles of concentration is 3 ~ 10 times;
(3) coal tar oil recovery: step (2) must be rich in the concentrated solution of coal tar through membrane filtration through gravity settling separation or centrifugation, obtain coal tar and the detar waste water of recovery;
(4) phenol reclaims: the dialyzate of step (2) membrane filtration gained removing coal tar and step (3) coal tar oil recovery gained detar waste water are mixed, add acid solution and regulate its pH value to 2 ~ 6, add extraction agent extracting and separating and obtain crude phenols and the blue charcoal waste water of dephenolize;
(5) recovery ammonia: the blue charcoal waste water of step (4) phenol recovery gained dephenolize is added alkaline solution and regulates its pH value to 10 ~ 12, heating evaporation removing ammonia, ammonia absorbs through persulfate solution to be produced ammonium sulfate or obtains liquefied ammonia and deamination orchid charcoal waste water through cooling liquid.
2. the recoverying and utilizing method of coal tar and ammonia phenol in blue charcoal waste water as claimed in claim 1, is characterized in that: step (2) described membrane filtration is the one of ceramic membrane filter or metal membrane filter; The ceramic membrane element aperture of ceramic membrane filter is 20 ~ 100nm; The metallic membrane element aperture of metal membrane filter is 30 ~ 100nm; The operating pressure of membrane filtration is 3 ~ 6bar, and temperature is 15 ~ 55 DEG C.
3. the recoverying and utilizing method of coal tar and ammonia phenol in blue charcoal waste water as claimed in claim 1, is characterized in that: the acid that adds described in step (2) membrane filtration regulates its pH to 2 ~ 6 acid used to be the one of sulfuric acid, nitric acid, hydrochloric acid or phosphoric acid.
4. the recoverying and utilizing method of coal tar and ammonia phenol in blue charcoal waste water as claimed in claim 1, it is characterized in that: the gravity settling separation described in step (3) coal tar oil recovery to be rich in the concentrated solution of coal tar, pump in gravity settling basin, be the coal tar on upper strata and the decoking waste water of lower floor through gravity settling separation, the coal tar on upper strata reclaims through recovery tube.
5. the recoverying and utilizing method of coal tar and ammonia phenol in blue charcoal waste water as claimed in claim 1, it is characterized in that: the centrifugation described in step (3) coal tar oil recovery to be rich in the concentrated solution of coal tar, pump in whizzer, be coal tar and decoking waste water through centrifugation, coal tar reclaims through recovery tube; The centrifugal force of centrifugation is 2200 ~ 4000.
6. the recoverying and utilizing method of coal tar and ammonia phenol in blue charcoal waste water as claimed in claim 1, is characterized in that: the extraction agent used of the extraction described in step (4) dephenolize is kerosene, mibk, N, N
,-dimethyl-g yl acetamide (N, N
,-503), the one of tributyl phosphate, isopropyl ether, N-BUTYL ACETATE or crude benzol or its mixture.
7. the recoverying and utilizing method of coal tar and ammonia phenol in blue charcoal waste water as claimed in claim 1, is characterized in that: the optimum extractant used of the extraction described in step (4) dephenolize is N, N
,-dimethyl-g yl acetamide (N, N
,-503), the mixture of tributyl phosphate and benzene.
8. the recoverying and utilizing method of coal tar and ammonia phenol in blue charcoal waste water as claimed in claim 1, is characterized in that: the optimum extractant used of the extraction described in step (4) dephenolize is N, N
,-dimethyl-g yl acetamide (N, N
,-503), the mixture of tributyl phosphate and kerosene.
9. the recoverying and utilizing method of coal tar and ammonia phenol in blue charcoal waste water as claimed in claim 1, is characterized in that: the alkaline solution described in step (5) recovery ammonia is the one of sodium hydroxide, potassium hydroxide or sodium carbonate solution.
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| CN109250854A (en) * | 2018-08-16 | 2019-01-22 | 内蒙古万众炜业科技环保股份公司 | The processing method of semi-coke wastewater |
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| CN109250854A (en) * | 2018-08-16 | 2019-01-22 | 内蒙古万众炜业科技环保股份公司 | The processing method of semi-coke wastewater |
| CN114539031A (en) * | 2022-02-18 | 2022-05-27 | 南京钛净流体技术有限公司 | Device and method for removing tar in m-phenylenediamine acidic hydrolysate |
| CN114539031B (en) * | 2022-02-18 | 2023-12-22 | 南京钛净流体技术有限公司 | Device and method for removing tar from m-phenylenediamine acidic hydrolysate |
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