CN104445815B - Technological method and device for semi-coke production wastewater resource utilization - Google Patents
Technological method and device for semi-coke production wastewater resource utilization Download PDFInfo
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- CN104445815B CN104445815B CN201410675578.7A CN201410675578A CN104445815B CN 104445815 B CN104445815 B CN 104445815B CN 201410675578 A CN201410675578 A CN 201410675578A CN 104445815 B CN104445815 B CN 104445815B
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- 239000002351 wastewater Substances 0.000 title claims abstract description 129
- 239000000571 coke Substances 0.000 title claims abstract description 55
- 238000000034 method Methods 0.000 title claims abstract description 41
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 6
- 238000000605 extraction Methods 0.000 claims abstract description 83
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims abstract description 82
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 56
- 229910021529 ammonia Inorganic materials 0.000 claims abstract description 41
- BNWPUUZJGBXAFM-UHFFFAOYSA-N azane oxalonitrile Chemical compound N.N#CC#N BNWPUUZJGBXAFM-UHFFFAOYSA-N 0.000 claims abstract description 33
- 239000011280 coal tar Substances 0.000 claims abstract description 28
- 239000007789 gas Substances 0.000 claims abstract description 24
- 238000000926 separation method Methods 0.000 claims abstract description 19
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 18
- NESLWCLHZZISNB-UHFFFAOYSA-M sodium phenolate Chemical compound [Na+].[O-]C1=CC=CC=C1 NESLWCLHZZISNB-UHFFFAOYSA-M 0.000 claims abstract description 9
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 8
- 230000000536 complexating effect Effects 0.000 claims abstract description 7
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims abstract description 6
- 235000011114 ammonium hydroxide Nutrition 0.000 claims abstract description 6
- 238000001816 cooling Methods 0.000 claims abstract description 6
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 5
- 239000003921 oil Substances 0.000 claims description 78
- 239000012535 impurity Substances 0.000 claims description 17
- 239000002253 acid Substances 0.000 claims description 16
- 239000000295 fuel oil Substances 0.000 claims description 14
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 13
- 239000003546 flue gas Substances 0.000 claims description 13
- 230000003197 catalytic effect Effects 0.000 claims description 12
- 238000011084 recovery Methods 0.000 claims description 12
- 238000007599 discharging Methods 0.000 claims description 10
- 230000000694 effects Effects 0.000 claims description 10
- 239000002245 particle Substances 0.000 claims description 10
- JMANVNJQNLATNU-UHFFFAOYSA-N oxalonitrile Chemical compound N#CC#N JMANVNJQNLATNU-UHFFFAOYSA-N 0.000 claims description 8
- 230000009615 deamination Effects 0.000 claims description 7
- 238000006481 deamination reaction Methods 0.000 claims description 7
- 238000007667 floating Methods 0.000 claims description 7
- 150000002989 phenols Chemical class 0.000 claims description 7
- 238000012545 processing Methods 0.000 claims description 6
- 238000001914 filtration Methods 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 5
- 239000000203 mixture Substances 0.000 claims description 5
- 239000007787 solid Substances 0.000 claims description 5
- 239000001117 sulphuric acid Substances 0.000 claims description 5
- 235000011149 sulphuric acid Nutrition 0.000 claims description 5
- 239000000779 smoke Substances 0.000 claims description 2
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 abstract description 8
- 238000004064 recycling Methods 0.000 abstract description 7
- 230000002441 reversible effect Effects 0.000 abstract description 3
- 239000000284 extract Substances 0.000 abstract description 2
- 230000020477 pH reduction Effects 0.000 abstract 2
- 239000003517 fume Substances 0.000 abstract 1
- 238000000638 solvent extraction Methods 0.000 abstract 1
- 239000003245 coal Substances 0.000 description 13
- 238000011161 development Methods 0.000 description 6
- 239000000126 substance Substances 0.000 description 6
- 230000007547 defect Effects 0.000 description 3
- 239000000839 emulsion Substances 0.000 description 3
- 238000005292 vacuum distillation Methods 0.000 description 3
- 238000004065 wastewater treatment Methods 0.000 description 3
- 238000004140 cleaning Methods 0.000 description 2
- 239000003034 coal gas Substances 0.000 description 2
- 238000004939 coking Methods 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 238000004821 distillation Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
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- 230000008676 import Effects 0.000 description 2
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- 231100000719 pollutant Toxicity 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 238000010791 quenching Methods 0.000 description 2
- 230000000171 quenching effect Effects 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- XFXPMWWXUTWYJX-UHFFFAOYSA-N Cyanide Chemical compound N#[C-] XFXPMWWXUTWYJX-UHFFFAOYSA-N 0.000 description 1
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- ICAIHGOJRDCMHE-UHFFFAOYSA-O ammonium cyanide Chemical compound [NH4+].N#[C-] ICAIHGOJRDCMHE-UHFFFAOYSA-O 0.000 description 1
- 230000003851 biochemical process Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000002894 chemical waste Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 239000010779 crude oil Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005008 domestic process Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 239000010842 industrial wastewater Substances 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- -1 nitrine class inorganic compound Chemical class 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 239000010729 system oil Substances 0.000 description 1
- 230000026676 system process Effects 0.000 description 1
- 239000011269 tar Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
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Abstract
The invention discloses a technological method and device for semi-coke production wastewater resource utilization. The technological method comprises three steps, namely deep oil-water separation, high-efficiency complexing extraction dephenolization and ammonia stilling, to be specific, firstly, separating and recycling a part of coal tar from wastewater when the wastewater passes through an oil partitioning tank, recycling coal tar in a precision filter and an oil-water separator in sequence after discharged water passes through a coarse filter; feeding the oil-removed semi-coke wastewater and an extraction agent into an extraction tower for extraction and dephenolization, feeding the extract phase and a sodium hydroxide solution into a reverse extraction tower for countercurrent contact reverse extraction, feeding an obtained sodium phenolate solution into an acidification kettle, and adding sulfuric acid for acidification to obtain crude phenol; feeding dephenolized wastewater discharged from the bottom of the extraction tower into a wastewater heater, feeding into an ammonia cyanogen separator to be mixed with hot air from an air heater to remove ammonia after being heated by fume from the air heater, and feeding an ammonia-containing mixed gas discharged from the top of the ammonia-cyanogen separator into an ammonia water cooler for cooling to obtain ammonia water. By adopting the method and the device, precious resources such as coal tar, phenol and ammonia can be recycled from the semi-coke production wastewater resource, and the biodegradability of the semi-coke wastewater is improved.
Description
Technical field
The present invention relates to a kind of coal chemical industrial waste water processing means and method, be specifically related to a kind of semi-coke and produce waste water resource
Change and utilize process and device.
Background technology
China's energy resource structure is gas, many coal oil-poor, few, for solving the lance of china natural resources constructional aspect and economic development
Shield, reduces the dependence to crude oil, in recent years, at the main coal-producing area of China positive Development of Coal chemical industry, such as coal system
Oil project etc., significant.Coal Chemical Industry greatly improves the comprehensive utilization value of coal, and Coal Chemical Industry produces
During produce waste water complicated, the most disposable.Therefore, the use of rational wastewater processing technology, is coal
Chemical industry goes on the guarantee of benign development recycling economy, it is achieved the win-win of economic development and environment protection.
Semi-coke produces, mainly with low temperature (about 650 DEG C) distillation process in not (weak) viscous coal one as raw material,
During this technique produces, available semi-coke (semicoke), light, the weight product such as coal tar and middle low temperature distillation coal gas,
The ground such as the Shaanxi of China, Inner Mongol, Datong, Xinjiang have abundant high-quality (not glue) coal, send out with China economy
Exhibition adapts, and semi-coke industry is also developing rapidly, and within 2013, semi-coke yield is about 50,000,000 tons.High with coke
Temperature (about 1000 DEG C) distillation process compares, in semi-coke the low temperature distillation removing coal gas that generated of fugitive constituent without
High temperature secondary cracks, containing a large amount of not by the pollutant of high-temperature oxydation in raw coke oven gas washings, and the coking to be compared of its concentration
Waste water exceeds about 10 times.The waste component that semi-coke produces during the low temperature distillation, gas purification of raw coal is multiple
Miscellaneous, containing a large amount of loop chain organic compound, nitrine class inorganic compound, oil in water, ammonia cyanogen, phenol, COD,
SS equal size is the highest, and such as COD content about 40000mg/l, ammonia cyanogen content about 3000mg/l, total phenol content is about
15000mg/l, semi-coke produces concentration height and the complicated component of Pollutants in Wastewater, makes semi-coke produce waste water and be difficult to place
Reason, Heavy environmental pollution, the principles and policies of " energy-saving and emission-reduction " advocated with country protection environment are incompatible.
Current domestic process semi-coke produces waste water usual way two kinds, and one is biochemical treatment, and one is at burning
Reason, the problem the most just existed for existing two kinds of processing methods is described.Use at existing biochemical waste water
, there is following typical problem: the composition of coking chemical waste water is especially complex, and biodegradability is low in reason, and the zero-emission often said
Put, be only the waste water after processing is reused for producing in (such as quenching aspect), when quenching, be only useless
Water becomes waste gas and enters in air, also can pollute.
Use incinerating method to process waste water, from design principle, there is the defect of maximum, it may be assumed that waste water is injected directly into
In the flame of gas-fired, chemically for basic principle, belong to imperfect combustion, substantial amounts of CO certainly will be produced,
And for partial organic substances, such as ammonia and cyanogen, it is impossible to thoroughly remove, and substantial amounts of CO needs to deposit at 1100 DEG C
It is 1s in the time, just can be oxidized to CO2, additionally incinerator floor space is very big, and the heat of burning cannot fill again
Point utilizing, water cannot go utilizations again, causes the significant wastage of the energy and water, and maintenance simultaneously is higher with operating cost,
During burning disposal, contained cyanide and part ammonia cyanide are discharged in air after cannot be carried out processing again,
Cause atmospheric pollution.
Above two kinds of methods also have a common weak point, i.e. some useful components in waste water, as coal tar,
Phenol, ammonia etc. do not reclaim, and make resource can not get recycling, and this not only causes the significant waste of resource, also
Pollute environment.In order to solve semi-coke to produce the problem of environmental pollution that waste water causes, and semi-coke is produced waste water
Recycling, is badly in need of developing a kind of semi-coke and produces utilization of wastewater resource process and device.
Summary of the invention
It is an object of the invention to provide a kind of semi-coke and produce utilization of wastewater resource process and device, it is possible to from
In semi-coke wastewater, resource reclaims the precious resources such as coal tar, phenol, ammonia, improves the biodegradability of semi-coke wastewater, gram
Take existing semi-coke wastewater treatment technology and do not reclaim the available resources in semi-coke wastewater and the process of existing semi-coke wastewater
The defects such as technical finesse weak effect, biochemical treatment is difficult, operating cost is high.
For reaching above-mentioned purpose, the present invention by the following technical solutions:
A kind of semi-coke produces utilization of wastewater resource process unit, including the oil separation tank being connected with semi-coke wastewater, every
The outlet of oil tank is connected with coarse filter, the outlet of coarse filter successively with accurate filter and oil water separator phase
Connection,；The outlet waste water of described oil water separator connects through pipeline dephenolize system and ammonia water recovery system；Described
Dephenolize system includes back extraction tower and the acid out still that extraction tower is connected with the extraction tower with extractant entrance, described
Back extraction tower import connects with the tower top of extraction tower, and the tower top of described back extraction tower connects with the extractant entrance of extraction tower,
Acid out still is connected at the bottom of the tower of described back extraction tower；Described ammonia water recovery system includes waste water heater, the ammonia being sequentially communicated
Cyanogen separator, and ammonia cooler, at the bottom of the tower of described waste water heater connection extraction tower, described waste water heater
Being provided with smoke inlet and exhanst gas outlet, described ammonia cyanogen separator is provided with air intake, described ammonia cyanogen separator
Top connection ammonia cooler, bottom connection biochemical system.
Described accurate filter at least uses two-step serial to be connected with oil water separator.
The flue gas of described waste water heater and the air of ammonia cyanogen separator come from air heater.
The flue gas being used for adding hot-air in described air heater comes from catalytic cracker, in ammonia cooler not
Condensable gas enters in this catalytic cracker.
A kind of process implementing said apparatus, comprises the following steps: step one: from the semi-coke of production system
Waste water initially enters oil separation tank, and oil droplet floats up to the water surface and forms oil reservoir, is discharged by collection tube and reclaims, and oil separation tank goes out
The mouth of a river connects coarse filter import, by the effect of coarse filter filter element, retains the big particle diameter solid suspended impurity of removal,
Sequentially entering accurate filter afterwards and oil water separator goes the removal of impurity and reclaims coal tar, light oil floating discharge sets
Standby, heavy oil sinking device for transferring；Step 2: enter extraction tower from the waste water after the oil removing of oil water separator,
In extraction tower, waste water and efficient complexing extractant counter current contacting, carry out extracting and dephenolizing, the extraction of the tower top of extraction tower
Enter back extraction tower mutually, in back extraction tower, extraction phase and sodium hydroxide solution counter current contacting, carry out back extraction, obtain
Extractant and sodium phenolate solution, sodium phenolate solution, from being discharged at the bottom of the tower of back extraction tower acid out still, adds sulphuric acid and carries out
Acid out, acid out obtains crude phenols；Step 3: the waste water after extraction tower dephenolize enters waste water heater, heats at waste water
In device, by the flue gas from air heater, the waste water of heating enters ammonia cyanogen separator, adds with from air
The hot-air mixing of hot device carries out deamination, and the ammonia-containing gas mixture in ammonia cyanogen separator is discharged into ammonia from top
Cooler cooling obtains ammonia, and the non-condensable gas in ammonia cooler goes to catalytic cracker, carries out pyrolytic,
The waste water of ammonia cyanogen separator bottom drains into biochemical system and processes.
The recovery method of described non-condensable gas is: this non-condensable gas enters in catalytic cracker, carries out high temperature
The flue gas that tail of semi coke burning after decomposition, the gas after decomposition and purification produces passes sequentially through air heater and gives up
Water heater, adds hot-air and waste water, carries out waste heat recovery, and heated air and waste water together enter into ammonia cyanogen
In separator.
The waste water of described coarse filter outlet is removed partial impurities in 1# accurate filter and reclaims coal tar, gently
Oil floats and discharges, and heavy oil sinks to discharging, and the waste water after 1# accurate filter processes enters in 1# oil water separator
Coal tar is reclaimed in row oil-water separation, and light oil floats and discharges, and heavy oil sinks to discharging, after 1# oil water separator processes
Waste water in 2# accurate filter, remove residual impurity in waste water, filtering accuracy reaches ss less than 2ppm, and particle diameter is little
In 2um, concurrently separating recovery coal tar, light oil floats and discharges, and heavy oil sinks to discharging, at 2# accurate filter
Waste water after reason enters into 2# oil water separator, and light oil floats and discharges, and heavy oil sinks to discharging, it is ensured that in waste water
Oil content is down to below 300ppm.
Compared with prior art, the method have the advantages that
By such scheme, the present invention resource can reclaim the valuable money such as coal tar, phenol, ammonia from semi-coke wastewater
Source, improve semi-coke wastewater biodegradability, overcome existing semi-coke wastewater treatment technology do not reclaim in semi-coke wastewater can
By resource and existing semi-coke wastewater treatment technology poor processing effect, the defect such as biochemical treatment is difficult, operating cost is high,
The economic competitiveness of semi-coke industry can also be effectively improved, promote that the cleaning of semi-coke industry produces, it is achieved recycling economy
Development.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawings the present invention is described in further detail.
See Fig. 1, the inventive system comprises the oil separation tank 1 being connected with semi-coke wastewater, the outlet of oil separation tank 1
Be connected with coarse filter 2, the outlet of coarse filter 2 successively with 1# accurate filter 3,1# oil water separator 4,
2# accurate filter 5,2# oil water separator 6 are connected, and the outlet of 2# oil water separator 6 is through pipeline and with extraction
The extraction tower 7 taking agent entrance is connected, and the waste water that 2# oil water separator 6 is discharged enters in extraction tower 7 and extracts
Dephenolize, extraction phase overflows into back extraction tower 8 from the tower top of extraction tower 7 and carries out with sodium hydroxide solution counter current contacting
Back extraction, is communicated with acid out still 9 at the bottom of the tower of back extraction tower 8, the sodium phenolate solution that back extraction tower 8 end obtains enters acid out still
9, add sulphuric acid and carry out acid out and obtain crude phenols, the tower top of back extraction tower 8 by the road with the extractant entrance phase of extraction tower 7
Even, the regenerated efficient complexing extractant that the tower top of back extraction tower 8 is discharged enters extraction through the extractant entrance of extraction tower 7
In tower 7, being communicated with waste water heater 10 bottom extraction tower 7, the waste water after discharging dephenolize bottom extraction tower 7 enters
Entering waste water heater 10, waste water heater 10 is communicated with ammonia cyanogen separator 11, and by the road with air heater
The exhanst gas outlet of 13 is connected, and the waste water in waste water heater 10 is entered by the flue gas from air heater 13
Enter ammonia cyanogen separator 11, simultaneously enter the flue gas qualified discharge in waste water heater 10, ammonia cyanogen separator 11 warp
Pipeline is connected with the air outlet slit of air heater 13, in ammonia cyanogen separator 11 waste water with from air heater
The hot-air mixing of 13 carries out deamination, and ammonia cyanogen separator 11 top is communicated with ammonia cooler 12, ammonia cyanogen separator
Entrance ammonia cooler 12 cooling containing ammonia mixed gas out of 11 tops obtains ammonia, ammonia cyanogen separator 11 times
Portion is communicated with biochemical system, and the waste water of ammonia cyanogen separator 11 bottom enters biochemical system and processes, ammonia cooler 12
Being communicated with catalytic cracker 14, the non-condensable gas that ammonia cooler 12 is discharged enters catalytic cracker 14 to be carried out
Air heater 13 is sent into through pipeline after cracking.
Operation process of the present invention is by the semi-coke wastewater from production system, initially enters oil separation tank 1, passes through eddy flow
District and decanting zone honeycomb inclined-tube effect, oil droplet floats up to the water surface and forms oil reservoir, is discharged by collection tube and reclaims, removes
Wastewater surface oil slick, oil separation tank 1 water outlet enters coarse filter 2, by the effect of coarse filter 2 filter element, retains
Removing big particle diameter solid suspended impurity, enter 1# accurate filter 3 afterwards, waste water retains greater particle size by having
Solid impurity and the filter element of separation coal tar effect, remove partial impurities and reclaim coal tar, and light oil floating discharge sets
Standby, heavy oil sinking device for transferring realizes part oil-water separation, and isolated coal tar recovering, from 1# precision mistake
The waste water of filter 3 enters 1# oil water separator 4, carries out oil-water separation and reclaim coal tar, gently under the effect of filter element
Oil floating device for transferring, heavy oil sinking device for transferring, most dispersed oil and part oil emulsion are separated.
The water outlet of 1# oil water separator 4 enters 2# accurate filter 5, retains small solid impurity by having and separates coal
The filter element of tar effect, removes residual impurity in waste water, and filtering accuracy is less than 2um up to ss less than 2ppm, particle diameter,
Concurrently separating recovery coal tar, light oil floating device for transferring, heavy oil sinking device for transferring, its water outlet enters 2# oil
Oil emulsion that water separator is further separated out in water and dissolved oil, light oil floating device for transferring, heavy oil sinks to discharging
Equipment, the oil content in waste water is down to below 300ppm.
Waste water after the oil removing of 2# oil water separator 6, enter extraction tower 7, in extraction tower 7, waste water with
Efficiently complexing extractant counter current contacting, carries out extracting and dephenolizing, and the extraction phase of extraction tower top enters back extraction tower 8, instead
In extraction tower 8, extraction phase and sodium hydroxide solution counter current contacting, carry out back extraction, be extracted agent and sodium phenolate is molten
Liquid.Regenerating extracting agent is discharged from the tower top of back extraction tower 8, and the system that returns recycles, the phenol sodium obtained at the bottom of back extraction tower
Saline solution enters acid out still 9, adds sulphuric acid and carries out acid out and obtain crude phenols.
Waste water after extraction tower 7 dephenolize enters waste water heater 10, and the burning of catalytic cracker 14 tail of semi coke produces
Flue gas by air heater 13 add hot-air laggard enter waste water heater 10 heated waste water, waste water heater
In 10, heated waste water enters ammonia cyanogen separator 11, mixes with the hot-air from air heater and carries out deamination.
Ammonia-containing gas mixture in ammonia cyanogen separator 11 is discharged into ammonia cooler 12 cooling and obtains ammonia from top,
In ammonia cooler 12, non-condensable gas goes to catalytic cracker 14, carries out pyrolytic.Ammonia cyanogen separator 11
The waste water of bottom drains into biochemical system and processes.
The process of oil removal of the present invention and nominal particle size impurity is, enters coarse filtration by the waste water of oil separation tank 1
Device 2, the suspended impurity that in water, particle diameter is bigger is stopped by filtration core and is removed, enters 1# precision mistake by the waste water of filter element
Filter 3, is separated removal at the suspended impurity granule that this part is less and has a small amount of coal tar to separate and recover.1# essence
Waste water after close filter 3 processes enters 2# accurate filter 5 by 1# oil water separator 4, separates to remove and gives up
The nominal particle size impurity left in water.In waste water, removal efficiency reaches more than 95%, concurrently separates recovery section
Coal tar.
The present invention reclaims the process of coal tar, and first waste water separate and recover part coal tar in oil separation tank 1,
Water outlet by after coarse filter 2 successively 1# accurate filter 3,1# oil water separator 4,2# accurate filter 5,
2# oil water separator 6 carries out oil-water separation, reclaims coal tar, coal tar content in 2# oil water separator 6 water outlet
Less than 300mg/l.
The present invention reclaims the process of crude phenols, and the semi-coke wastewater after oil removing enters extraction tower 7 with efficient complexing extractant
Counter current contacting carries out extracting and dephenolizing, and extraction phase overflows from the tower top of extraction tower 7, and the waste water after dephenolize is from extraction tower 7
Tower at the bottom of discharge；Extraction phase enters back extraction tower 8 counter current contacting back extraction, the tower top of back extraction tower 8 with sodium hydroxide solution
The extractant obtained returns system and recycles, and the sodium phenolate solution obtained at the bottom of the tower of back extraction tower 8 enters acid out still and adds
Sulphuric acid carries out acid out and obtains crude phenols.
The present invention reclaims the process of ammonia, discharges the waste water after dephenolize and enter waste water heater bottom extraction tower 7
10, by from the flue gas of air heater 13 to 110 DEG C-126 DEG C, the waste water of heating enters ammonia cyanogen and separates
Device 11 mixes with the hot-air from air heater 13 and carries out deamination, ammonia cyanogen separator 11 top containing out
Ammonia mixed gas enters ammonia cooler 12 cooling and obtains ammonia, and the waste water of ammonia cyanogen separator 11 bottom enters biochemistry
System processes.
1, the present invention has good separating effect, coal tar clearance to oil emulsion, oil slick, dispersed oil in waste water
Reach more than 80%.
2, the present invention uses efficient complexing extractant extracting and dephenolizing, reversible complex reaction and extraction separation process phase
In conjunction with, extraction efficiency is high, reaches more than 95%.Efficiently extractant is compared with other dephenolize extractant, has distribution
The advantages such as coefficient is big, and in water dissolubility is little.
3, the present invention uses tail of semi coke combustion product gases to heat semi-coke wastewater, the semi-coke after using hot-air and heating
Waste water directly contacts deamination, and with other deamination technics comparing, the method energy consumption is low, and ammonia removal efficiency is high, does not produce two
Secondary pollution.
4, the waste water quality after the present invention processes significantly improves, and in waste water, the clearance of total phenols is more than 95%,
The clearance of ammonia cyanogen is more than 85%, and the clearance of COD is more than 90%, and the waste water after process meets subsequent biochemical and processes
Requirement, biodegradability is high, final discharged wastewater met the national standard after subsequent biochemical processes.
5, the present invention solves semi-coke and produces pollution problem resource recovery coal tar, phenol, the ammonia that waste water causes
The useful resources such as water, it is possible to increase the economic competitiveness of semi-coke project, promote that the cleaning of semi-coke industry produces, it is achieved
Recycling economy development.
6, present invention process is advanced, floor space is little, stable, automaticity is high.
Claims (7)
1. a semi-coke produces utilization of wastewater resource device, it is characterised in that: include being connected with semi-coke wastewater
Oil separation tank (1), the outlet of oil separation tank (1) is connected with coarse filter (2), and the outlet of coarse filter (2) depends on
Secondary it is connected with accurate filter and oil water separator；The outlet of described oil water separator connects through pipeline dephenolize system
System and ammonia water recovery system；Described dephenolize system includes extraction tower (7), back extraction tower (8) and acid out still (9),
Described back extraction tower connects with the tower top of extraction tower, and the tower top of described back extraction tower connects with the extractant entrance of extraction tower,
Acid out still is connected at the bottom of the tower of described back extraction tower；Described ammonia water recovery system includes waste water heater, the ammonia being sequentially communicated
Cyanogen separator, and ammonia cooler, at the bottom of the tower of described waste water heater connection extraction tower, described waste water heater
Being provided with smoke inlet and exhanst gas outlet, described ammonia cyanogen separator is provided with air intake, described ammonia cyanogen separator
Top connection ammonia cooler, bottom connection biochemical system；In waste water heater, the waste water after dephenolize by from
The flue gas of air heater, the waste water of heating enters ammonia cyanogen separator (11).
2. a kind of semi-coke as claimed in claim 1 produces utilization of wastewater resource device, it is characterised in that: described
Accurate filter at least use two-step serial to be connected with oil water separator.
3. a kind of semi-coke as claimed in claim 1 produces utilization of wastewater resource device, it is characterised in that: described
The flue gas of waste water heater (10) and the air of ammonia cyanogen separator come from air heater.
4. a kind of semi-coke as claimed in claim 3 produces utilization of wastewater resource device, it is characterised in that: described
Air heater is used for add the flue gas of hot-air and comes from catalytic cracker (14), in ammonia cooler can not
Solidifying gas enters in this catalytic cracker.
5. the process implementing device described in claim 1, it is characterised in that: comprise the following steps:
Step one: the semi-coke wastewater from production system initially enters oil separation tank (1), oil droplet floats up to the water surface and is formed
Oil reservoir, is discharged by collection tube and reclaims, and by the effect of coarse filter (2) filter element, retains the big particle diameter solid of removal
Suspended impurity, sequentially enters accurate filter afterwards and oil water separator goes the removal of impurity and reclaims coal tar, on light oil
Floating mat goes out, and heavy oil sinks to discharging；
Step 2: enter extraction tower (7) from the waste water after oil water separator oil removing, in extraction tower (7),
Waste water and efficient complexing extractant counter current contacting, carry out extracting and dephenolizing, and the extraction phase of extraction tower (7) tower top enters
Back extraction tower (8), in back extraction tower (8), extraction phase and sodium hydroxide solution counter current contacting, carry out back extraction,
Being extracted agent and sodium phenolate solution, sodium phenolate solution is from being discharged into acid out still (9) at the bottom of the tower of back extraction tower (8)
In, adding sulphuric acid and carry out acid out, acid out obtains crude phenols；
Step 3: the waste water after extraction tower (7) dephenolize enters waste water heater (10), in waste water heater,
Waste water after dephenolize is entered ammonia cyanogen separator (11) by the flue gas from air heater, the waste water of heating,
Mix with the hot-air from air heater and carry out deamination, the ammonia-containing gas mixture in ammonia cyanogen separator (11)
It is discharged into ammonia cooler (12) cooling from top and obtains ammonia, the not condensated gas in ammonia cooler (12)
Body enters catalytic cracker pyrolytic, and the waste water of ammonia cyanogen separator (11) bottom drains into biochemical system and processes.
Method the most according to claim 5, it is characterised in that: the recovery method of described non-condensable gas is:
This non-condensable gas enters in catalytic cracker, after carrying out pyrolytic, and the flue gas that tail of semi coke burning produces
Passing sequentially through air heater and waste water heater adds hot-air and waste water, heated air and waste water together enter
In ammonia cyanogen separator.
7. according to the method described in claim 5 or 6, it is characterised in that: described coarse filter (2) exports
Waste water is removed partial impurities in 1# accurate filter (3) and reclaims coal tar, and light oil floats and discharges, under heavy oil
Mattress sinking goes out, and the waste water after 1# accurate filter (3) processes carries out profit in 1# oil water separator (4) and divides
From reclaiming coal tar, light oil floating is discharged, and heavy oil sinks to discharging, giving up after 1# oil water separator (4) processes
Water removes residual impurity in waste water in 2# accurate filter (5), and filtering accuracy reaches ss less than 2ppm, particle diameter
Less than 2 μm, concurrently separating recovery coal tar, light oil floats and discharges, and heavy oil sinks to discharging, through 2# accurate filter
(5) waste water after processing enters into 2# oil water separator (6), and light oil floats and discharges, and heavy oil sinks to discharging, useless
Oil content in water is down to below 300ppm.
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| CN104926029B (en) * | 2015-05-27 | 2017-03-22 | 张世文 | Comprehensive use of coke, phenol and ammonia in semi coke sewage and sewage disposal recycle method |
| CN104860444A (en) * | 2015-05-27 | 2015-08-26 | 张世文 | Device and method for recovering coal tar in semi-coke wastewater |
| CN104944691B (en) * | 2015-06-10 | 2017-07-14 | 张世文 | The semi-coke wastewater processing regeneration concentrated based on film and resource recycling device |
| CN105399174B (en) * | 2015-12-17 | 2018-08-03 | 王伟东 | Low energy consumption extracting and dephenolizing coal chemical industry wastewater and phenol recycling complete set of equipments and processing method |
| CN105461137B (en) * | 2015-12-19 | 2017-12-29 | 榆林学院 | A kind of oily waste water highly effective pretreatment apparatus |
| CN105923833A (en) * | 2016-06-13 | 2016-09-07 | 郑州天萃取科技有限公司 | Phenolic wastewater treatment system and phenolic wastewater treatment technology |
| CN109399849A (en) * | 2018-10-23 | 2019-03-01 | 广东省建筑设计研究院 | A kind of semi-coke wastewater treatment process |
| CN111892210B (en) * | 2020-09-03 | 2023-04-07 | 查都(海南)科技有限公司 | Semi-coke wastewater pretreatment method and device |
| CN112591993B (en) * | 2020-12-09 | 2022-08-30 | 江苏鲲鹏环保工程技术有限公司 | Semi-coke wastewater zero-discharge treatment equipment and method |
| CN113716776A (en) * | 2021-08-31 | 2021-11-30 | 中建安装集团有限公司 | Oil-containing high-concentration phenol-ammonia wastewater treatment device and process |
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| CN201288106Y (en) * | 2008-09-23 | 2009-08-12 | 王东辉 | Coking industry industrial wastewater comprehensive wastewater treatment system |
| CN103553269A (en) * | 2013-10-31 | 2014-02-05 | 北京清大国华环保科技有限公司 | Method and device for treating and recycling semi-coke wastewater |
| CN203668176U (en) * | 2013-11-30 | 2014-06-25 | 陕西华祥能源科技集团有限公司 | Device for recycling semi coke production wastewater |
| CN203781978U (en) * | 2014-03-13 | 2014-08-20 | 中钢集团鞍山热能研究院有限公司 | Advanced treatment equipment for coal chemical industrial wastewater |
| CN204400759U (en) * | 2014-11-21 | 2015-06-17 | 陕西华祥能源科技集团有限公司 | A kind of blue charcoal factory effluent resource utilization process device |
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