CN107555664A - The pretreating process of sodium phenolate waste water in a kind of tar deep-processing process - Google Patents
The pretreating process of sodium phenolate waste water in a kind of tar deep-processing process Download PDFInfo
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- CN107555664A CN107555664A CN201710994817.9A CN201710994817A CN107555664A CN 107555664 A CN107555664 A CN 107555664A CN 201710994817 A CN201710994817 A CN 201710994817A CN 107555664 A CN107555664 A CN 107555664A
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Abstract
The invention belongs to Wastewater Pretreatment field in tar deep-processing process, more particularly to a kind of pretreating process of sodium phenolate waste water in tar deep-processing process, utilize carbon dioxide, the air supporting environment formed in water body caused by the sodium carbonate reaction in sulfuric acid and sodium phenolate waste water.By quick agitating mode, oily substance is set gradually to separate out.Oil slick is removed by surface again and flocculation sediment realizes bottom oil removing, so as to reach the purpose for removing Organic substance in water.Sodium phenolate waste water COD clearance reaches 20% or so after this PROCESS FOR TREATMENT, and oil removal efficiency is high；Compared with the dilution facture of traditional coking chemical waste water, dilution water more than 22% is reduced.The technical finesse effect stability, the oil slick and heavy oil content of sodium phenolate waste water can be effectively reduced, reduce the use of Macrodilution water, beneficial to the cost declining of subsequent treatment process, and invented technology is simple, and investment and occupation of land are smaller, are easy to apply.
Description
Technical field
The invention belongs to Wastewater Pretreatment field in tar deep-processing process, and in particular in a kind of tar deep-processing process
The pretreating process of sodium phenolate waste water.
Background technology
Coal tar is one of significant by-products of coal chemical industry enterprises, and its component is sufficiently complex.Produced in tar deep processing
A certain amount of sodium phenolate waste water is produced in journey.COD, phenol equal size all cross ten thousand in these waste water, belong to used water difficult to degradate.State at present
Interior coal chemical industry enterprises use for reference coking waste water treatment method and tar deep-processing waste water are handled.But coking chemical waste water belongs to high nitrogen and given up
Water, tar deep-processing waste water are high-carbon waste water, and both priority pollutant characteristics are different, can be straight using identical handling process
Connect and cause to need to use substantial amounts of dilution water in tar production wastewater treatment process.The increase of dilution water means that enterprise needs every year
Higher effluent cost is paid, certain economical and environmentally friendly pressure is brought to enterprise.
Pretreating process generally uses as the primary means of Minimisation of Industrial Wastewater in the handling process of industrial wastewater.
The sludge loading of subsequent biological treatment is reduced by handling process such as oil removing, air supporting, precipitations, advantageously reduces the use of dilution water
And subsequent treatment cost.But the effect of these pretreating process processing tar deep-processing waste water is extremely limited.Exploitation is adapted to tar
The typical pretreating process of water quality characteristic of deep-processing waste water, the water and processing cost for reducing tar deep-processing waste water have turned into
The active demand of China's tar deep processing industry.
The content of the invention
The defects of in order to overcome prior art, present invention aim to provide phenol sodium in a kind of tar deep-processing process
The pretreating process of salt waste water, solve conventional process flow length, the problem of effect is unstable, at the same reduce dilution water use,
Reduce wastewater discharge and processing cost.
To achieve the above object, the present invention provides a kind of pretreating process of sodium phenolate waste water in tar deep-processing process,
Specifically include following steps：
1) sodium phenolate waste water is sent into flotation tank, adds sulfuric acid solution and stir rapidly, reduce the pH value of waste water, wherein：
Sulfuric acid solution concentration is 3~5mol/L, the PH of waste water is rapidly reduced to 6.0~6.5；
2) a large amount of small CO of reaction generation in above-mentioned steps2Gas, air supporting environment is formed, strike off the floating of air supporting pool surface
Oil gas steeps；
3) flotation tank water outlet enters pipe-line mixer, is mixed with bodied ferric sulfate, and the dosage of bodied ferric sulfate is 1
~3g/L；
4) waste water after mixing is sent into grid flocculation to be flocculated；
5) flocculation basin water outlet carries out precipitation oil removing into tube settler；
6) tube settler water outlet enters biochemical sewage workshop section regulating reservoir, completes the preprocessing process of sodium phenolate waste water.
Specifically, striking off the oil slick bubble of air supporting pool surface in the step 2) using Oil scraper, the speed of Oil scraper is not
More than 5m/min.
Specifically, flotation tank water outlet uses perforated pipe collector pipe water outlet in the step 3), Water discharge flow speed is not more than 0.5m/
s。
Specifically, flotation tank water outlet enters pipe-line mixer through booster pump supercharging in the step 3).
Specifically, incorporation time is 15~20s in pipe-line mixer in the step 3), water volume flow rate is in blender
1.0~1.5m/s.
Specifically, grid flocculation is set as 3 sections, wherein leading portion, stage casing and each 3 lattice of back segment, leading portion in the step 4)
Vertical water speed with stage casing is 0.12~0.14m/s, and the vertical water speed of back segment is 0.10m/s, and flocculation time is 10~15min.
Specifically, the inclined tube of tube settler uses regular hexagon in the step 5), the angle of inclination of inclined tube is 60 °,
Inclined tube is highly 0.8~1.0m, and tube settler bottom sets long-pending oil pipe, realizes that bottom is removed using perforated pipe gravity spoil disposal method
Oil.
More specifically, in any of the above-described tar deep-processing process sodium phenolate waste water pretreating process, in the step 3),
Bodied ferric sulfate substituted using poly-ferric chloride added in pipe-line mixer and mixed, the dosage of poly-ferric chloride for 1~
3g/L。
The mentality of designing of the present invention is：Sodium phenolate waste water is pre-processed using sulfuric acid.Given up using acid with sodium phenolate
Carbon dioxide caused by sodium carbonate reaction in water, the air supporting ring that the microbubble during carbon dioxide release is formed in water body
Border.By quick agitating mode, water body switchs to rapidly weak acid or neutral environment.The emulsified state of phenol oily substance is rapid in water body
Destroy, oily substance gradually separates out.Removal oil slick is struck off by surfactant foam, by adding a certain amount of flocculant, sedimentation screen
Catch removal heavy oil.So as to reach the purpose for removing Organic substance in water.
The beneficial effects of the invention are as follows：Sodium phenolate waste water COD clearance reaches 20% or so after this PROCESS FOR TREATMENT, oil removing
Efficiency high；Compared with the dilution facture of traditional coking chemical waste water, dilution water more than 22% is reduced.The technical finesse effect is steady
It is fixed, the oil slick and heavy oil content of sodium phenolate waste water can be effectively reduced, the use of Macrodilution water is reduced, beneficial to subsequent treatment work
The cost declining of skill, and invented technology is simple, investment and occupation of land are smaller, are easy to apply.
Embodiment
The invention will be further elaborated by the following examples, but does not limit the present invention.It is every without departing substantially from the present invention
The change of design or equivalent substitute are included within protection scope of the present invention.
Embodiment 1
Pretreating process is tested in laboratory conditions, is comprised the following steps that：
1) 1000ml sodium phenolate waste water is placed in beaker, adds the sulfuric acid solution 150ml that concentration is 3mol/L, stir rapidly
Mix, make the pH of waste water reduce rapidly, now the pH of waste water is about 6.2.
2) sulfuric acid and a large amount of small CO of sodium phenolate waste water reaction generation in whipping process2Gas, form air supporting environment.
3) perforation water intaking technique is simulated using siphon off water method, after avoiding beaker top oil slick water and the entrance of heavy bottom oil water
Continuous technique.Obtain the waste water 1000ml after oil removing.The throwing of bodied ferric sulfate 1.2g/L or bodied ferric sulfate is added in beaker
Dosage is about 1.7g/L, quickly stirs 10s, moderate-speed mixer 20s, mixes slowly 30s.
4) waste water after stirring is subjected to natural subsidence, sedimentation time 20min.Waste water after sedimentation is useless after processing
Water.
Sodium phenolate waste water COD clearance after above-mentioned processing reaches 30% or so.At dilution with traditional coking chemical waste water
Logos compares, and reduces dilution water 43%.
Embodiment 2
The pretreating process of sodium phenolate waste water of the present invention is applied in real work, is comprised the following steps that：
1) 0.5t/h sodium phenolates waste water is sent into flotation tank, 4mol/L sulfuric acid solution is added in flotation tank and is stirred rapidly
Mix, acid adding amount is controlled by pH on-Line Monitor Devices, the pH of waste water is rapidly reduced to 6.3 or so.
2) flotation tank upper strata uses the oil slick bubble of oil wiper scraper surface, the speed 3m/min of Oil scraper.
3) flotation tank water outlet uses perforated pipe collector pipe water outlet, Water discharge flow speed 0.3m/s.Water outlet is pressurized through booster pump to be entered
Pipe-line mixer, waste water is mixed with poly-ferric chloride in blender.The incorporation time of pipe-line mixer is 15s, mixing
Water volume flow rate is 1.5m/s in device.The dosage of poly-ferric chloride is 2g/L.
4) waste water is sent into grid flocculation, flocculation time 13min after mixing, and grid flocculation is set as 3 sections, wherein
The vertical water speed in leading portion, stage casing and each 3 lattice of back segment, leading portion and stage casing is 0.14m/s, and the vertical water speed of back segment is 0.10m/s.
5) water outlet of flocculation basin enters tube settler, and inclined tube uses regular hexagon, and the angle of inclination of inclined tube is 60 °, tiltedly
Pipe is highly 1.0m.Tube settler bottom sets long-pending oil pipe, and bottom oil removing is realized using perforated pipe gravity spoil disposal method.
6) tube settler water outlet enters biochemical sewage workshop section regulating reservoir, completes the preprocessing process of sodium phenolate waste water.
Sodium phenolate waste water COD clearance reaches 20% or so after processing.With the dilution facture phase of traditional coking chemical waste water
Compare, reduce dilution water 25%.
Embodiment 3
The pretreating process of sodium phenolate waste water of the present invention is applied in real work, is comprised the following steps that：
1) 0.5t/h sodium phenolates waste water is sent into flotation tank, 4mol/L sulfuric acid solution is added in flotation tank and is stirred rapidly
Mix, acid adding amount is controlled by pH on-Line Monitor Devices, the pH of waste water is rapidly reduced to 6.0.
2) flotation tank upper strata uses the oil slick bubble of oil wiper scraper surface, the speed 3m/min of Oil scraper.
3) flotation tank water outlet uses perforated pipe collector pipe water outlet, Water discharge flow speed 0.5m/s.Water outlet is pressurized through booster pump to be entered
Pipe-line mixer, waste water is mixed with poly-ferric chloride in blender.The incorporation time of pipe-line mixer is 18s, mixing
Water volume flow rate is 1.3m/s in device.The dosage of poly-ferric chloride is 1g/L.
4) waste water is sent into grid flocculation, flocculation time 15min after mixing, and grid flocculation is set as 3 sections, wherein
The vertical water speed in leading portion, stage casing and each 3 lattice of back segment, leading portion and stage casing is 0.13m/s, and the vertical water speed of back segment is 0.10m/s.
5) water outlet of flocculation basin enters tube settler, and inclined tube uses regular hexagon, and the angle of inclination of inclined tube is 60 °, tiltedly
Pipe is highly 0.8m.Tube settler bottom sets long-pending oil pipe, and bottom oil removing is realized using perforated pipe gravity spoil disposal method.
6) tube settler water outlet enters biochemical sewage workshop section regulating reservoir, completes the preprocessing process of sodium phenolate waste water.
Sodium phenolate waste water COD clearance reaches 18% after processing.Compared with the dilution facture of traditional coking chemical waste water,
Reduce dilution water about 22%.
Embodiment 4
The pretreating process of sodium phenolate waste water of the present invention is applied in real work, is comprised the following steps that：
1) 0.5t/h sodium phenolates waste water is sent into flotation tank, 4mol/L sulfuric acid solution is added in flotation tank and is stirred rapidly
Mix, acid adding amount is controlled by pH on-Line Monitor Devices, the pH of waste water is rapidly reduced to 6.5.
2) flotation tank upper strata uses the oil slick bubble of oil wiper scraper surface, the speed 4m/min of Oil scraper.
3) flotation tank water outlet uses perforated pipe collector pipe water outlet, Water discharge flow speed 0.4m/s.Water outlet is pressurized through booster pump to be entered
Pipe-line mixer, waste water is mixed with poly-ferric chloride in blender.The incorporation time of pipe-line mixer is 16s, mixing
Water volume flow rate is 1.0m/s in device.The dosage of poly-ferric chloride is 3g/L.
4) waste water is sent into grid flocculation, flocculation time 11min after mixing, and grid flocculation is set as 3 sections, wherein
The vertical water speed in leading portion, stage casing and each 3 lattice of back segment, leading portion and stage casing is 0.14m/s, and the vertical water speed of back segment is 0.10m/s.
5) water outlet of flocculation basin enters tube settler, and inclined tube uses regular hexagon, and the angle of inclination of inclined tube is 60 °, tiltedly
Pipe is highly 1.0m.Tube settler bottom sets long-pending oil pipe, and bottom oil removing is realized using perforated pipe gravity spoil disposal method.
6) tube settler water outlet enters biochemical sewage workshop section regulating reservoir, completes the preprocessing process of sodium phenolate waste water.
Sodium phenolate waste water COD clearance reaches 20% after processing.Compared with the dilution facture of traditional coking chemical waste water,
Reduce dilution water 25%.
Embodiment 5
The pretreating process of sodium phenolate waste water of the present invention is applied in real work, is comprised the following steps that：
1) 0.5t/h sodium phenolates waste water is sent into flotation tank, 4mol/L sulfuric acid solution is added in flotation tank and is stirred rapidly
Mix, acid adding amount is controlled by pH on-Line Monitor Devices, the pH of waste water is rapidly reduced to 6.1 or so.
2) flotation tank upper strata uses the oil slick bubble of oil wiper scraper surface, the speed 5m/min of Oil scraper.
3) flotation tank water outlet uses perforated pipe collector pipe water outlet, Water discharge flow speed 0.3m/s.Water outlet is pressurized through booster pump to be entered
Pipe-line mixer, waste water is mixed with bodied ferric sulfate in blender.The incorporation time of pipe-line mixer is 20s, mixing
Water volume flow rate is 1.4m/s in device.The dosage of bodied ferric sulfate is 1g/L.
4) waste water is sent into grid flocculation, flocculation time 10min after mixing, and grid flocculation is set as 3 sections, wherein
The vertical water speed in leading portion, stage casing and each 3 lattice of back segment, leading portion and stage casing is 0.14m/s, and the vertical water speed of back segment is 0.10m/s.
5) water outlet of flocculation basin enters tube settler, and inclined tube uses regular hexagon, and the angle of inclination of inclined tube is 60 °, tiltedly
Pipe is highly 0.9m.Tube settler bottom sets long-pending oil pipe, and bottom oil removing is realized using perforated pipe gravity spoil disposal method.
6) tube settler water outlet enters biochemical sewage workshop section regulating reservoir, completes the preprocessing process of sodium phenolate waste water.
Sodium phenolate waste water COD clearance reaches 25% or so after processing.With the dilution facture phase of traditional coking chemical waste water
Compare, reduce dilution water 33%.
Embodiment 6
The pretreating process of sodium phenolate waste water of the present invention is applied in real work, is comprised the following steps that：
1) 0.5t/h sodium phenolates waste water is sent into flotation tank, 3mol/L sulfuric acid solution is added in flotation tank and is stirred rapidly
Mix, acid adding amount is controlled by pH on-Line Monitor Devices, the pH of waste water is rapidly reduced to 6.1 or so.
2) flotation tank upper strata uses the oil slick bubble of oil wiper scraper surface, the speed 5m/min of Oil scraper.
3) flotation tank water outlet uses perforated pipe collector pipe water outlet, Water discharge flow speed 0.4m/s.Water outlet is pressurized through booster pump to be entered
Pipe-line mixer, waste water is mixed with bodied ferric sulfate in blender.The incorporation time of pipe-line mixer is 19s, mixing
Water volume flow rate is 1.0m/s in device.The dosage of bodied ferric sulfate is 1.8g/L.
4) waste water is sent into grid flocculation, flocculation time 10min after mixing, and grid flocculation is set as 3 sections, wherein
The vertical water speed in leading portion, stage casing and each 3 lattice of back segment, leading portion and stage casing is 0.12m/s, and the vertical water speed of back segment is 0.10m/s.
5) water outlet of flocculation basin enters tube settler, and inclined tube uses regular hexagon, and the angle of inclination of inclined tube is 60 °, tiltedly
Pipe is highly 1.0m.Tube settler bottom sets long-pending oil pipe, and bottom oil removing is realized using perforated pipe gravity spoil disposal method.
6) tube settler water outlet enters biochemical sewage workshop section regulating reservoir, completes the preprocessing process of sodium phenolate waste water.
Sodium phenolate waste water COD clearance reaches 27% after processing.Compared with the dilution facture of traditional coking chemical waste water,
Reduce dilution water 37%.
Claims (8)
- A kind of 1. pretreating process of sodium phenolate waste water in tar deep-processing process, it is characterised in that：Comprise the following steps：1) sodium phenolate waste water is sent into flotation tank, adds sulfuric acid solution and stir rapidly, reduce the pH value of waste water, wherein：Sulfuric acid Solution concentration is 3~5mol/L, the PH of waste water is rapidly reduced to 6.0~6.5；2) a large amount of small CO of reaction generation in above-mentioned steps2Gas, air supporting environment is formed, strike off the oil slick gas of air supporting pool surface Bubble；3) flotation tank water outlet enters pipe-line mixer, is mixed with bodied ferric sulfate, and the dosage of bodied ferric sulfate is 1~ 3g/L；4) waste water after mixing is sent into grid flocculation to be flocculated；5) flocculation basin water outlet carries out precipitation oil removing into tube settler；6) tube settler water outlet enters biochemical sewage workshop section regulating reservoir, completes the preprocessing process of sodium phenolate waste water.
- 2. according to claim 1 in tar deep-processing process sodium phenolate waste water pretreating process, it is characterised in that：It is described The oil slick bubble of air supporting pool surface is struck off in step 2) using Oil scraper, the speed of Oil scraper is no more than 5m/min.
- 3. according to claim 1 in tar deep-processing process sodium phenolate waste water pretreating process, it is characterised in that：It is described Flotation tank water outlet uses perforated pipe collector pipe water outlet in step 3), and Water discharge flow speed is not more than 0.5m/s.
- 4. according to claim 1 in tar deep-processing process sodium phenolate waste water pretreating process, it is characterised in that：It is described Flotation tank water outlet enters pipe-line mixer through booster pump supercharging in step 3).
- 5. according to claim 1 in tar deep-processing process sodium phenolate waste water pretreating process, it is characterised in that：It is described Incorporation time is 15~20s in pipe-line mixer in step 3), and water volume flow rate is 1.0~1.5m/s in blender.
- 6. according to claim 1 in tar deep-processing process sodium phenolate waste water pretreating process, it is characterised in that：It is described Grid flocculation is set as 3 sections, wherein leading portion, stage casing and each 3 lattice of back segment in step 4), and the vertical water speed in leading portion and stage casing is 0.12~0.14m/s, the vertical water speed of back segment is 0.10m/s, and flocculation time is 10~15min.
- 7. according to claim 1 in tar deep-processing process sodium phenolate waste water pretreating process, it is characterised in that：It is described The inclined tube of tube settler uses regular hexagon in step 5), and the angle of inclination of inclined tube is 60 °, and inclined tube is highly 0.8~1.0m, Tube settler bottom sets long-pending oil pipe, and bottom oil removing is realized using perforated pipe gravity spoil disposal method.
- 8. the pretreating process of sodium phenolate waste water, its feature exist in any tar deep-processing process according to claims 1 to 7 In：In the step 3), substituted in bodied ferric sulfate addition pipe-line mixer and mixed using poly-ferric chloride, polyaluminium The dosage of iron is 1~3g/L.
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| CN115196805A (en) * | 2022-07-21 | 2022-10-18 | 中国科学院山西煤炭化学研究所 | Treatment method for deoiling, dedusting, deacidifying and deaminating semi-coke wastewater |
| CN115215482A (en) * | 2022-07-27 | 2022-10-21 | 伊吾疆纳新材料有限公司 | Novel coking wastewater oil removing process |
| CN115304194A (en) * | 2021-05-08 | 2022-11-08 | 中国石油天然气集团有限公司 | Method and device for treating underground water polluted by petroleum hydrocarbon |
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