CN104829025B - A kind of method of oil-containing coal chemical industrial waste water extraction oil removing - Google Patents
A kind of method of oil-containing coal chemical industrial waste water extraction oil removing Download PDFInfo
- Publication number
- CN104829025B CN104829025B CN201410790099.XA CN201410790099A CN104829025B CN 104829025 B CN104829025 B CN 104829025B CN 201410790099 A CN201410790099 A CN 201410790099A CN 104829025 B CN104829025 B CN 104829025B
- Authority
- CN
- China
- Prior art keywords
- oil
- extraction
- solvent naphtha
- waste water
- solvent
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
- Extraction Or Liquid Replacement (AREA)
- Physical Water Treatments (AREA)
Abstract
A kind of method that the invention discloses oil-containing coal chemical industrial waste water extraction oil removing, it is characterised in that specifically include following steps: (1) Wastewater Pretreatment；(2) solvent naphtha fractional distillation；(3) extraction oil removing.The present invention utilizes the oil separated out from waste water, after being fractionated into, takes wherein part and makees solvent naphtha extraction wastewater, effectively can be fused together by the oil of the emulsifying state that originally can not separate out in waste water and separate out.Owing to all solvent naphthas come from waste water, it is not required to additionally buy extractant, and is not required to the solvent naphtha of residual in raffinate waste water is recycled, also will not additionally increase the pollutional load of waste water.And during solvent for use oil of the present invention extraction, also it is not required to adjust wastewater pH.Its technological process is simple, and oil recovery efficiency is high, non-secondary pollution.Use the present invention can more effectively improve the operating characteristics of follow up device, and alleviate the load of subsequent biochemical section, it is ensured that the qualified discharge of waste water or reuse.
Description
Technical field
The invention belongs to field of waste water treatment, a kind of method being specifically related to oil-containing coal chemical industrial waste water extraction oil removing.By the method, the oil pollutant in Coal Chemical Industry oily waste water is removed and reclaims, reduce the pollutional load of waste water, improve the biodegradability of waste water.
Background technology
In the waste water that Coal Chemical Industry process produces, oil content is higher, the existence of oils in waste water, brings a lot of harm to aftertreatment device, such as, processing equipment and pipeline scale are serious, cause efficiency to reduce, change shortage of heat, have impact on the continuous and steady operation of device, cause the rising of processing cost.Time serious, even resulting in device cannot be properly functioning.It addition, oil pollutant is all difficult to biodegradation, disturb the process up to standard of waste water.Thus, the oil pollutant removing efficiently and reclaiming in coal chemical industrial waste water, is to realize waste water reclaiming and innoxious necessary links.
Owing in coal chemical industrial waste water, part oils dispersant liquid drop is less, emulsifying or the reason such as the least with water difference in specific gravity, traditional gravitational settling, air supporting method removal effect are undesirable, the operability of adsorption filtration method is the poorest, and chemical flocculation cost is high and easily causes the secondary pollution of flocculant, thus, currently, the oil pollutant clearance in coal chemical industrial waste water is relatively low.
Extraction oil removing is an other class method of waste water oil removing.The extractant that extraction oil removing is commonly used has petroleum ether, n-hexane, chloromethane, chloroform etc., these extractants have preferable effect of extracting, but owing to these extractants are not compositions own in coal chemical industrial waste water, and the biodegradability of these extractants own is poor, thus after extraction, in water, often there is residual, adds additional pollutional load to subsequent wastewater treatment.Could effectively be layered it addition, these extractants need to regulate the pH value of water to less than 7, and due in waste water ammon amount the highest, adjust pH to need substantial amounts of acid, cost is the highest and adds the salinity of system.
Summary of the invention
The deficiency existed for prior art, the technical problem to be solved is to provide a kind of method of oil-containing coal chemical industrial waste water extraction oil removing, can effectively remove the pollutant such as oils in waste water.
For solving above-mentioned technical problem, the present invention adopts the technical scheme that:
A kind of method of oil-containing coal chemical industrial waste water extraction oil removing, it is characterised in that specifically include following steps:
(1) Wastewater Pretreatment: be transported to oil-containing coal chemical industrial waste water settle in oil partition tank, carry out settling oil removal, produce layering, the most under the water surface for tar heavy oil, oil on the water surface is middle oil or light oil, takes oil or light oil in part and is transported to follow-up solvent naphtha fractionating column；
(2) solvent naphtha fractional distillation: after middle oil that step (1) carries or the partial solvent oil phase that light oil carries with step (3) extraction equipment top mix, fractional distillation is carried out in sending into solvent naphtha fractionating column, solvent naphtha fractionating column arranges multiple side take-off mouth, it is fractionated into different fraction as required: the middle and lower part of solvent naphtha fractionating column arranges carbolic oil extraction mouth, by carbolic oil extraction mouth extraction carbolic oil product；The middle and upper part extraction solvent naphtha of solvent naphtha fractionating column, solvent naphtha return tank is entered after solvent naphtha condensation, oil in solvent naphtha return tank is partly refluxed to solvent naphtha fractionating column, it is partially into solvent naphtha hold-up tank, as the extractant of extraction equipment, fractionating column top and bottom extraction light oil oil gas and mink cell focus respectively；
(3) extraction oil removing: the solvent naphtha that the oil-containing coal chemical industrial waste water processed through step (1) and the conveying of solvent naphtha sump pump come is extracted in extraction equipment, the theoretical stage 1-10 level of extraction equipment, the top of extraction equipment obtains solvent oil phase, the bottom of extraction equipment obtains raffinate aqueous phase, middle oil that partial solvent oil phase carries with step (1) or light oil enter the solvent naphtha fractionating column of step (2) after mixing, another part can use with cycling extraction.
Further, the theoretical stage 20-40 level of solvent naphtha fractionating column in described step (2), operate pressure 0.01-0.2MPa(absolute pressure).
Further, tower top temperature 10-60 DEG C of solvent naphtha fractionating column in described step (2), bottom temperature is 150-300 DEG C.
Further, in described step (2), the temperature of each side take-off mouth can set according to demand, and wherein the temperature of solvent naphtha extraction mouth is 40-120 DEG C.
Further, in described step (2), the temperature of carbolic oil extraction mouth is 110-250 DEG C.
Further, reflux ratio 0.1-0.6 at solvent oil phase extraction mouth in described step (3).
Further, in described step (3), extraction equipment can be one or more in extraction tower, multistage mixer-settler extractor, static mixer, oil water separator.
The invention have the benefit that
1, the present invention utilizes the oil separated out from waste water, after being fractionated into, takes wherein part and makees solvent naphtha extraction wastewater, effectively can be fused together by the oil of the emulsifying state that originally can not separate out in waste water and separate out.Owing to all solvent naphthas come from waste water, it is not required to additionally buy extractant, and is not required to the solvent naphtha of residual in raffinate waste water is recycled, also will not additionally increase the pollutional load of waste water.And during solvent for use oil of the present invention extraction, also it is not required to adjust wastewater pH, simplifies technique, saved cost.
2, the method for the present invention is compared with prior art, and its technological process is simple, and oil recovery efficiency is high, non-secondary pollution.Use the present invention can more effectively improve the operating characteristics of follow up device, and alleviate the load of subsequent biochemical section, farthest reduce cost of sewage disposal, it is ensured that the qualified discharge of waste water or reuse.
3, the present invention considers industrial actual traffic-operating period, selected by the parameter of the factors such as the pressure and temperature at the bottom of Optimized Extraction effect, the control number of plates, tower top tower, it is effectively increased each alternate mass transfer effect and separating effect in extraction process, decrease the operation energy consumption of extraction time and device, improve the performance driving economy of device.
Accompanying drawing explanation
Fig. 1 is the process chart of the present invention.
Detailed description of the invention
The present invention is described in more detail below in conjunction with the accompanying drawings.
Embodiment 1
Certain coal plant, coal chemical industrial waste water treating capacity is 50 ton hour, and wherein oil content is 3500mg/L, carries out waste water oil removing according to the process equipment flow chart such as Fig. 1, and step is as follows:
A kind of method of oil-containing coal chemical industrial waste water extraction oil removing, it is characterised in that specifically include following steps:
(1) Wastewater Pretreatment: be transported to oil-containing coal chemical industrial waste water settle in oil partition tank, carry out settling oil removal, produce layering, the most under the water surface for tar heavy oil, oil on the water surface is middle oil or light oil, takes oil or light oil in part and is transported to follow-up solvent naphtha fractionating column；
(2) solvent naphtha fractional distillation: after middle oil that step (1) carries or the partial solvent oil phase that light oil carries with step (3) extraction equipment top mix, fractional distillation is carried out in sending into solvent naphtha fractionating column, the theoretical stage of solvent naphtha fractionating column 20 grades, operation pressure 0.01MPa(absolute pressure), tower top temperature 10 DEG C, bottom temperature is 150 DEG C, solvent naphtha fractionating column arranges multiple side take-off mouth, the temperature of each side take-off mouth can set according to demand, it is fractionated into different fraction as required: the middle and lower part of this example solvent naphtha fractionating column arranges carbolic oil extraction mouth, extraction temperature 110 DEG C, by carbolic oil extraction mouth extraction carbolic oil product；The middle and upper part flow process of solvent naphtha fractionating column is extraction solvent naphtha at 40 DEG C, solvent naphtha return tank is entered after solvent naphtha condensation, oil in solvent naphtha return tank is partly refluxed to solvent naphtha fractionating column, it is partially into solvent naphtha hold-up tank, as the extractant of extraction equipment, fractionating column top and bottom extraction light oil oil gas and mink cell focus respectively；
(3) extraction oil removing: the solvent naphtha that the oil-containing coal chemical industrial waste water processed through step (1) and the conveying of solvent naphtha sump pump come is extracted in extraction equipment, extraction equipment is extraction tower, the oil-containing coal chemical industrial waste water processed through step (1) inputs from the top of extraction equipment, the solvent naphtha of solvent naphtha sump pump conveying inputs from the lower section of extraction equipment, the theoretical stage of extraction equipment 1 grade, the top of extraction equipment obtains solvent oil phase, reflux ratio 0.1 at solvent oil phase extraction mouth, the bottom of extraction equipment obtains raffinate aqueous phase, middle oil that partial solvent oil phase carries with step (1) or light oil enter the solvent naphtha fractionating column of step (2) after mixing, another part can use with cycling extraction.
Detection: the oil removal rate (oil content rate of change before and after extraction) in water after detection process is 92%.
Embodiment 2
Certain coal plant, coal chemical industrial waste water treating capacity is 60 ton hour, and wherein oil content is 2300mg/L, carries out waste water oil removing according to the process equipment flow chart such as Fig. 1, and step is as follows:
A kind of method of oil-containing coal chemical industrial waste water extraction oil removing, it is characterised in that specifically include following steps:
(1) Wastewater Pretreatment: be transported to oil-containing coal chemical industrial waste water settle in oil partition tank, carry out settling oil removal, produce layering, the most under the water surface for tar heavy oil, oil on the water surface is middle oil or light oil, takes oil or light oil in part and is transported to follow-up solvent naphtha fractionating column；
(2) solvent naphtha fractional distillation: after middle oil that step (1) carries or the partial solvent oil phase that light oil carries with step (3) extraction equipment top mix, fractional distillation is carried out in sending into solvent naphtha fractionating column, the theoretical stage of solvent naphtha fractionating column 30 grades, operation pressure 0.03MPa(absolute pressure), tower top temperature 20 DEG C, bottom temperature is 160 DEG C, solvent naphtha fractionating column arranges multiple side take-off mouth, the temperature of each side take-off mouth can set according to demand, it is fractionated into different fraction as required: the middle and lower part of solvent naphtha fractionating column arranges carbolic oil extraction mouth, by carbolic oil extraction mouth extraction carbolic oil product, carbolic oil extraction temperature 145 DEG C；The middle and upper part flow process of solvent naphtha fractionating column is extraction solvent naphtha at 65 DEG C, solvent naphtha return tank is entered after solvent naphtha condensation, oil in solvent naphtha return tank is partly refluxed to solvent naphtha fractionating column, it is partially into solvent naphtha hold-up tank, as the extractant of extraction equipment, fractionating column top and bottom extraction light oil oil gas and mink cell focus respectively；
(3) extraction oil removing: the solvent naphtha that the oil-containing coal chemical industrial waste water processed through step (1) and the conveying of solvent naphtha sump pump come is extracted in extraction equipment, extraction equipment is multistage mixer-settler extractor, the oil-containing coal chemical industrial waste water processed through step (1) inputs from the top of extraction equipment, the solvent naphtha of solvent naphtha sump pump conveying inputs from the lower section of extraction equipment, the theoretical stage of extraction equipment 2 grades, the top of extraction equipment obtains solvent oil phase, reflux ratio 0.2 at solvent oil phase extraction mouth, the bottom of extraction equipment obtains raffinate aqueous phase, middle oil that partial solvent oil phase carries with step (1) or light oil enter the solvent naphtha fractionating column of step (2) after mixing, another part can use with cycling extraction.
Detection: the oil removal rate (oil content rate of change before and after extraction) in water after detection process is 90.4%.
Embodiment 3
Certain coal plant, coal chemical industrial waste water treating capacity is 80 ton hour, and wherein oil content is 3500mg/L, carries out waste water oil removing according to the process equipment flow chart such as Fig. 1, and step is as follows:
A kind of method of oil-containing coal chemical industrial waste water extraction oil removing, it is characterised in that specifically include following steps:
(1) Wastewater Pretreatment: be transported to oil-containing coal chemical industrial waste water settle in oil partition tank, carry out settling oil removal, produce layering, the most under the water surface for tar heavy oil, oil on the water surface is middle oil or light oil, takes oil or light oil in part and is transported to follow-up solvent naphtha fractionating column；
(2) solvent naphtha fractional distillation: after middle oil that step (1) carries or the partial solvent oil phase that light oil carries with step (3) extraction equipment top mix, fractional distillation is carried out in sending into solvent naphtha fractionating column, the theoretical stage of solvent naphtha fractionating column 40 grades, operation pressure 0.05MPa(absolute pressure), tower top temperature 45 DEG C, bottom temperature is 180 DEG C, solvent naphtha fractionating column arranges multiple side take-off mouth, the temperature of each side take-off mouth can set according to demand, it is fractionated into different fraction as required: the middle and lower part of solvent naphtha fractionating column arranges carbolic oil extraction mouth, by carbolic oil extraction mouth extraction carbolic oil product, extraction temperature is 160 DEG C；The middle and upper part flow process of solvent naphtha fractionating column is extraction solvent naphtha at 70 DEG C, solvent naphtha return tank is entered after solvent naphtha condensation, oil in solvent naphtha return tank is partly refluxed to solvent naphtha fractionating column, it is partially into solvent naphtha hold-up tank, as the extractant of extraction equipment, fractionating column top and bottom extraction light oil oil gas and mink cell focus respectively；
(3) extraction oil removing: the solvent naphtha that the oil-containing coal chemical industrial waste water processed through step (1) and the conveying of solvent naphtha sump pump come is extracted in extraction equipment, extraction equipment is static mixer, the oil-containing coal chemical industrial waste water processed through step (1) inputs from the top of extraction equipment, the solvent naphtha of solvent naphtha sump pump conveying inputs from the lower section of extraction equipment, the theoretical stage of extraction equipment 4 grades, the top of extraction equipment obtains solvent oil phase, reflux ratio 0.3 at solvent oil phase extraction mouth, the bottom of extraction equipment obtains raffinate aqueous phase, middle oil that partial solvent oil phase carries with step (1) or light oil enter the solvent naphtha fractionating column of step (2) after mixing, another part can use with cycling extraction.
Detection: the oil removal rate (oil content rate of change before and after extraction) in water after detection process is 94.1%.
Embodiment 4
Certain coal plant, coal chemical industrial waste water treating capacity is 50 ton hour, and wherein oil content is 1800mg/L, carries out waste water oil removing according to the process equipment flow chart such as Fig. 1, and step is as follows:
A kind of method of oil-containing coal chemical industrial waste water extraction oil removing, it is characterised in that specifically include following steps:
(1) Wastewater Pretreatment: be transported to oil-containing coal chemical industrial waste water settle in oil partition tank, carry out settling oil removal, produce layering, the most under the water surface for tar heavy oil, oil on the water surface is middle oil or light oil, takes oil or light oil in part and is transported to follow-up solvent naphtha fractionating column；
(2) solvent naphtha fractional distillation: after middle oil that step (1) carries or the partial solvent oil phase that light oil carries with step (3) extraction equipment top mix, fractional distillation is carried out in sending into solvent naphtha fractionating column, the theoretical stage of solvent naphtha fractionating column 25 grades, operation pressure 0.08MPa(absolute pressure), tower top temperature 50 DEG C, bottom temperature is 200 DEG C, solvent naphtha fractionating column arranges multiple side take-off mouth, the temperature of each side take-off mouth can set according to demand, it is fractionated into different fraction as required: the middle and lower part of solvent naphtha fractionating column arranges carbolic oil extraction mouth, by carbolic oil extraction mouth extraction carbolic oil product, extraction temperature 175 DEG C；The middle and upper part flow process of solvent naphtha fractionating column is extraction solvent naphtha at 75 DEG C, solvent naphtha return tank is entered after solvent naphtha condensation, oil in solvent naphtha return tank is partly refluxed to solvent naphtha fractionating column, it is partially into solvent naphtha hold-up tank, as the extractant of extraction equipment, fractionating column top and bottom extraction light oil oil gas and mink cell focus respectively；
(3) extraction oil removing: the solvent naphtha that the oil-containing coal chemical industrial waste water processed through step (1) and the conveying of solvent naphtha sump pump come is extracted in extraction equipment, extraction equipment is oil water separator, the oil-containing coal chemical industrial waste water processed through step (1) inputs from the top of extraction equipment, the solvent naphtha of solvent naphtha sump pump conveying inputs from the lower section of extraction equipment, the theoretical stage of extraction equipment 5 grades, the top of extraction equipment obtains solvent oil phase, reflux ratio 0.4 at solvent oil phase extraction mouth, the bottom of extraction equipment obtains raffinate aqueous phase, middle oil that partial solvent oil phase carries with step (1) or light oil enter the solvent naphtha fractionating column of step (2) after mixing, another part can use with cycling extraction.
Detection: the oil removal rate (oil content rate of change before and after extraction) in water after detection process is 96.01%.
Embodiment 5
Certain coal plant, coal chemical industrial waste water treating capacity is 60 ton hour, and wherein oil content is 3600mg/L, carries out waste water oil removing according to the process equipment flow chart such as Fig. 1, and step is as follows:
A kind of method of oil-containing coal chemical industrial waste water extraction oil removing, it is characterised in that specifically include following steps:
(1) Wastewater Pretreatment: be transported to oil-containing coal chemical industrial waste water settle in oil partition tank, carry out settling oil removal, produce layering, the most under the water surface for tar heavy oil, oil on the water surface is middle oil or light oil, takes oil or light oil in part and is transported to follow-up solvent naphtha fractionating column；
(2) solvent naphtha fractional distillation: after middle oil that step (1) carries or the partial solvent oil phase that light oil carries with step (3) extraction equipment top mix, fractional distillation is carried out in sending into solvent naphtha fractionating column, the theoretical stage of solvent naphtha fractionating column 35 grades, operation pressure 0.1MPa(absolute pressure), tower top temperature 55 DEG C, bottom temperature is 250 DEG C, solvent naphtha fractionating column arranges multiple side take-off mouth, the temperature of each side take-off mouth can set according to demand, it is fractionated into different fraction as required: the middle and lower part of solvent naphtha fractionating column arranges carbolic oil extraction mouth, by carbolic oil extraction mouth extraction carbolic oil product, extraction temperature 195 DEG C；The middle and upper part flow process of solvent naphtha fractionating column is extraction solvent naphtha at 90 DEG C, solvent naphtha return tank is entered after solvent naphtha condensation, oil in solvent naphtha return tank is partly refluxed to solvent naphtha fractionating column, it is partially into solvent naphtha hold-up tank, as the extractant of extraction equipment, fractionating column top and bottom extraction light oil oil gas and mink cell focus respectively；
(3) extraction oil removing: the solvent naphtha that the oil-containing coal chemical industrial waste water processed through step (1) and the conveying of solvent naphtha sump pump come is extracted in extraction equipment, extraction equipment is extraction tower, the oil-containing coal chemical industrial waste water processed through step (1) inputs from the top of extraction equipment, the solvent naphtha of solvent naphtha sump pump conveying inputs from the lower section of extraction equipment, the theoretical stage of extraction equipment 6 grades, the top of extraction equipment obtains solvent oil phase, reflux ratio 0.5 at solvent oil phase extraction mouth, the bottom of extraction equipment obtains raffinate aqueous phase, middle oil that partial solvent oil phase carries with step (1) or light oil enter the solvent naphtha fractionating column of step (2) after mixing, another part can use with cycling extraction.
Detection: the oil removal rate (oil content rate of change before and after extraction) in water after detection process is 97.12%.
Embodiment 6
Certain coal plant, coal chemical industrial waste water treating capacity is 80 ton hour, and wherein oil content is 2900mg/L, carries out waste water oil removing according to the process equipment flow chart such as Fig. 1, and step is as follows:
A kind of method of oil-containing coal chemical industrial waste water extraction oil removing, it is characterised in that specifically include following steps:
(1) Wastewater Pretreatment: be transported to oil-containing coal chemical industrial waste water settle in oil partition tank, carry out settling oil removal, produce layering, the most under the water surface for tar heavy oil, oil on the water surface is middle oil or light oil, takes oil or light oil in part and is transported to follow-up solvent naphtha fractionating column；
(2) solvent naphtha fractional distillation: after middle oil that step (1) carries or the partial solvent oil phase that light oil carries with step (3) extraction equipment top mix, fractional distillation is carried out in sending into solvent naphtha fractionating column, the theoretical stage of solvent naphtha fractionating column 20 grades, operation pressure 0.15MPa(absolute pressure), tower top temperature 60 DEG C, bottom temperature is 270 DEG C, solvent naphtha fractionating column arranges multiple side take-off mouth, the temperature of each side take-off mouth can set according to demand, it is fractionated into different fraction as required: the middle and lower part of solvent naphtha fractionating column arranges carbolic oil extraction mouth, by carbolic oil extraction mouth extraction carbolic oil product, extraction temperature 220 DEG C；The middle and upper part flow process of solvent naphtha fractionating column is extraction solvent naphtha at 110 DEG C, solvent naphtha return tank is entered after solvent naphtha condensation, oil in solvent naphtha return tank is partly refluxed to solvent naphtha fractionating column, it is partially into solvent naphtha hold-up tank, as the extractant of extraction equipment, fractionating column top and bottom extraction light oil oil gas and mink cell focus respectively；
(3) extraction oil removing: the solvent naphtha that the oil-containing coal chemical industrial waste water processed through step (1) and the conveying of solvent naphtha sump pump come is extracted in extraction equipment, the oil-containing coal chemical industrial waste water processed through step (1) inputs from the top of extraction equipment, the solvent naphtha of solvent naphtha sump pump conveying inputs from the lower section of extraction equipment, the theoretical stage of extraction equipment 8 grades, the top of extraction equipment obtains solvent oil phase, reflux ratio 0.6 at solvent oil phase extraction mouth, the bottom of extraction equipment obtains raffinate aqueous phase, middle oil that partial solvent oil phase carries with step (1) or light oil enter the solvent naphtha fractionating column of step (2) after mixing, another part can use with cycling extraction.
Detection: the oil removal rate (oil content rate of change before and after extraction) in water after detection process is 96.67%.
Embodiment 7
Certain coal plant, coal chemical industrial waste water treating capacity is 50 ton hour, and wherein oil content is 2200mg/L, carries out waste water oil removing according to the process equipment flow chart such as Fig. 1, and step is as follows:
A kind of method of oil-containing coal chemical industrial waste water extraction oil removing, it is characterised in that specifically include following steps:
(1) Wastewater Pretreatment: be transported to oil-containing coal chemical industrial waste water settle in oil partition tank, carry out settling oil removal, produce layering, the most under the water surface for tar heavy oil, oil on the water surface is middle oil or light oil, takes oil or light oil in part and is transported to follow-up solvent naphtha fractionating column；
(2) solvent naphtha fractional distillation: after middle oil that step (1) carries or the partial solvent oil phase that light oil carries with step (3) extraction equipment top mix, fractional distillation is carried out in sending into solvent naphtha fractionating column, the theoretical stage of solvent naphtha fractionating column 30 grades, operation pressure 0.18MPa(absolute pressure), tower top temperature 60 DEG C, bottom temperature is 300 DEG C, solvent naphtha fractionating column arranges multiple side take-off mouth, the temperature of each side take-off mouth can set according to demand, it is fractionated into different fraction as required: the middle and lower part of solvent naphtha fractionating column arranges carbolic oil extraction mouth, by carbolic oil extraction mouth extraction carbolic oil product, extraction temperature 225 DEG C；The middle and upper part flow process of solvent naphtha fractionating column is extraction solvent naphtha at 115 DEG C, solvent naphtha return tank is entered after solvent naphtha condensation, oil in solvent naphtha return tank is partly refluxed to solvent naphtha fractionating column, it is partially into solvent naphtha hold-up tank, as the extractant of extraction equipment, fractionating column top and bottom extraction light oil oil gas and mink cell focus respectively；
(3) extraction oil removing: the solvent naphtha that the oil-containing coal chemical industrial waste water processed through step (1) and the conveying of solvent naphtha sump pump come is extracted in extraction equipment, extraction equipment is multistage mixer-settler extractor, the oil-containing coal chemical industrial waste water processed through step (1) inputs from the top of extraction equipment, the solvent naphtha of solvent naphtha sump pump conveying inputs from the lower section of extraction equipment, the theoretical stage of extraction equipment 9 grades, the top of extraction equipment obtains solvent oil phase, reflux ratio 0.4 at solvent oil phase extraction mouth, the bottom of extraction equipment obtains raffinate aqueous phase, middle oil that partial solvent oil phase carries with step (1) or light oil enter the solvent naphtha fractionating column of step (2) after mixing, another part can use with cycling extraction.
Detection: the oil removal rate (oil content rate of change before and after extraction) in water after detection process is 95.44%.
Embodiment 8
Certain coal plant, coal chemical industrial waste water treating capacity is 60 ton hour, and wherein oil content is 4300mg/L, carries out waste water oil removing according to the process equipment flow chart such as Fig. 1, and step is as follows:
A kind of method of oil-containing coal chemical industrial waste water extraction oil removing, it is characterised in that specifically include following steps:
(1) Wastewater Pretreatment: be transported to oil-containing coal chemical industrial waste water settle in oil partition tank, carry out settling oil removal, produce layering, the most under the water surface for tar heavy oil, oil on the water surface is middle oil or light oil, takes oil or light oil in part and is transported to follow-up solvent naphtha fractionating column；
(2) solvent naphtha fractional distillation: after middle oil that step (1) carries or the partial solvent oil phase that light oil carries with step (3) extraction equipment top mix, fractional distillation is carried out in sending into solvent naphtha fractionating column, the theoretical stage of solvent naphtha fractionating column 40 grades, operation pressure 0.2MPa(absolute pressure), tower top temperature 60 DEG C, bottom temperature is 300 DEG C, solvent naphtha fractionating column arranges multiple side take-off mouth, the temperature of each side take-off mouth can set according to demand, it is fractionated into different fraction as required: the middle and lower part of solvent naphtha fractionating column arranges carbolic oil extraction mouth, by carbolic oil extraction mouth extraction carbolic oil product, extraction temperature 250 DEG C；The middle and upper part flow process of solvent naphtha fractionating column is extraction solvent naphtha at 120 DEG C, solvent naphtha return tank is entered after solvent naphtha condensation, oil in solvent naphtha return tank is partly refluxed to solvent naphtha fractionating column, it is partially into solvent naphtha hold-up tank, as the extractant of extraction equipment, fractionating column top and bottom extraction light oil oil gas and mink cell focus respectively；
(3) extraction oil removing: the solvent naphtha that the oil-containing coal chemical industrial waste water processed through step (1) and the conveying of solvent naphtha sump pump come is extracted in extraction equipment, extraction equipment is oil water separator, the oil-containing coal chemical industrial waste water processed through step (1) inputs from the top of extraction equipment, the solvent naphtha of solvent naphtha sump pump conveying inputs from the lower section of extraction equipment, the theoretical stage of extraction equipment 10 grades, the top of extraction equipment obtains solvent oil phase, reflux ratio 0.6 at solvent oil phase extraction mouth, the bottom of extraction equipment obtains raffinate aqueous phase, middle oil that partial solvent oil phase carries with step (1) or light oil enter the solvent naphtha fractionating column of step (2) after mixing, another part can use with cycling extraction.
Detection: the oil removal rate (oil content rate of change before and after extraction) in water after detection process is 96.05%.
Claims (7)
1. the method for an oil-containing coal chemical industrial waste water extraction oil removing, it is characterised in that specifically include following steps:
(1) Wastewater Pretreatment: be transported to oil-containing coal chemical industrial waste water settle in oil partition tank, carries out settling oil removal, produces
Layer estranged, the most under the water surface for tar heavy oil, the oil on the water surface is middle oil or light oil, takes oil in part
Or light oil is transported to follow-up solvent naphtha fractionating column；
(2) solvent naphtha fractional distillation: middle oil or light oil that step (1) carries carry with step (3) extraction equipment top
The mixing of partial solvent oil phase after, send in solvent naphtha fractionating column and carry out fractional distillation, solvent naphtha fractionating column arranges multiple
Side take-off mouth, is fractionated into different fraction: the middle and lower part of solvent naphtha fractionating column arranges carbolic oil extraction mouth as required,
By carbolic oil extraction mouth extraction carbolic oil product；The middle and upper part extraction solvent naphtha of solvent naphtha fractionating column, solvent naphtha condenses
Rear entrance solvent naphtha return tank, the oil in solvent naphtha return tank is partly refluxed to solvent naphtha fractionating column, is partially into
Solvent naphtha hold-up tank, as the extractant of extraction equipment, fractionating column top and bottom extraction light oil oil gas respectively and
Mink cell focus；
(3) extraction oil removing: will carry with solvent naphtha sump pump through the oil-containing coal chemical industrial waste water that step (1) processed
The solvent naphtha come extracts in extraction equipment, the theoretical stage 1-10 level of extraction equipment, extraction equipment
Top obtains solvent oil phase, and the bottom of extraction equipment obtains raffinate aqueous phase, partial solvent oil phase and step (1)
Entering the solvent naphtha fractionating column of step (2) after the middle oil of conveying or light oil mixing, another part can circulate
Extraction uses.
A kind of method of oil-containing coal chemical industrial waste water extraction oil removing, it is characterised in that institute
State the theoretical stage 20-40 level of solvent naphtha fractionating column in step (2), operate pressure 0.01-0.2MPa.
A kind of method of oil-containing coal chemical industrial waste water extraction oil removing, it is characterised in that institute
Stating tower top temperature 10-60 DEG C of solvent naphtha fractionating column in step (2), bottom temperature is 150-300 DEG C.
A kind of method of oil-containing coal chemical industrial waste water extraction oil removing, it is characterised in that institute
Stating the temperature of each side take-off mouth in step (2) to set according to demand, wherein the temperature of solvent naphtha extraction mouth is
40-120℃。
A kind of method of oil-containing coal chemical industrial waste water extraction oil removing, it is characterised in that institute
State the temperature of carbolic oil extraction mouth in step (2) and be 110-250 DEG C.
A kind of method of oil-containing coal chemical industrial waste water extraction oil removing, it is characterised in that institute
State reflux ratio 0.1-0.6 at solvent oil phase extraction mouth in step (3).
A kind of method of oil-containing coal chemical industrial waste water extraction oil removing, it is characterised in that institute
Stating extraction equipment in step (3) is extraction tower, multistage mixer-settler extractor, static mixer, oil water separator
In one or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410790099.XA CN104829025B (en) | 2014-12-19 | 2014-12-19 | A kind of method of oil-containing coal chemical industrial waste water extraction oil removing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410790099.XA CN104829025B (en) | 2014-12-19 | 2014-12-19 | A kind of method of oil-containing coal chemical industrial waste water extraction oil removing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104829025A CN104829025A (en) | 2015-08-12 |
| CN104829025B true CN104829025B (en) | 2016-08-10 |
Family
ID=53807285
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410790099.XA Active CN104829025B (en) | 2014-12-19 | 2014-12-19 | A kind of method of oil-containing coal chemical industrial waste water extraction oil removing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104829025B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109734149A (en) * | 2019-03-15 | 2019-05-10 | 北京赛科康仑环保科技有限公司 | A kind of coal chemical industrial waste water pre-extracted waste-oil scavenger |
-
2014
- 2014-12-19 CN CN201410790099.XA patent/CN104829025B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN104829025A (en) | 2015-08-12 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA2966882C (en) | Paraffinic froth treatment techniques | |
| CN101913718B (en) | Method for extracting and dephenolizing coal chemical industry wastewater | |
| CN102583915B (en) | Method for processing oily sludge in oil field | |
| CN102659204B (en) | Method for treating waste water in coal chemical industry | |
| CN106145426A (en) | In a kind of coal chemical industrial waste water, carbolic oil is combined removing system and processes technique | |
| CN113121076B (en) | Oil sludge sand treatment method | |
| CN109161433B (en) | Process method for recycling waste mineral oil | |
| CN103121774A (en) | Multi-stage recycling device and method for waste water in semi-coke production | |
| CN103801113B (en) | A kind of waste oil classification recycle device and method | |
| CN102491578A (en) | Method for stripping emptying tower top sewage by utilizing coke tower waste heat | |
| CN103408182A (en) | Process for deoiling residual ammonia water | |
| CN101830612B (en) | Oil-containing sludge recycling process and device thereof | |
| CN104829025B (en) | A kind of method of oil-containing coal chemical industrial waste water extraction oil removing | |
| CN103113912A (en) | Method for separating and extracting crude oil from oil sand | |
| CN206173157U (en) | Sewage deoiling combined system | |
| CN102757813A (en) | Crude oil processing unit containing electro-desalted sewage oil remover and method of crude oil processing unit | |
| CN105417814A (en) | Method for treating wastewater with nitrogen-containing organic matters in pymetrozine production procedures | |
| CN206814441U (en) | A kind of processing equipment of electric field acceleration extract and separate oil-polluted water | |
| CN104860444A (en) | Device and method for recovering coal tar in semi-coke wastewater | |
| CN102424444B (en) | Method and device for removing oil from desalted water of crude electrostatic desalting apparatus | |
| CN103964544A (en) | Method for oil removal from wastewater in field of coal chemical industry | |
| CN102070260B (en) | Wastewater recycling method and device for collection pipe section of dry distillation system for oil shale | |
| CN106966561A (en) | Oil-bearing sludge treatment equipment and technique | |
| CN104310731A (en) | Oily sludge treatment device | |
| CN104860443A (en) | Device and method for recovering coal tar in semi-coke wastewater |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| EXSB | Decision made by sipo to initiate substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20230426 Address after: 37-306, Lushang Lan'an New Town, 123 Xinye Road, Gaoxin District, Qingdao, Shandong 266000 Patentee after: QINGDAO JUNYANG CHEMICAL TECHNOLOGY Co.,Ltd. Address before: 266000 Qingdao University of Science & Technology, 99 Songling Road, Laoshan District, Qingdao, Shandong Patentee before: QINGDAO University OF SCIENCE AND TECHNOLOGY |