CN106630090A - Purification method of wastewater in coal chemical industry - Google Patents
Purification method of wastewater in coal chemical industry Download PDFInfo
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- CN106630090A CN106630090A CN201710169855.0A CN201710169855A CN106630090A CN 106630090 A CN106630090 A CN 106630090A CN 201710169855 A CN201710169855 A CN 201710169855A CN 106630090 A CN106630090 A CN 106630090A
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- oleyl amine
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/68—Treatment of water, waste water, or sewage by addition of specified substances, e.g. trace elements, for ameliorating potable water
- C02F1/682—Treatment of water, waste water, or sewage by addition of specified substances, e.g. trace elements, for ameliorating potable water by addition of chemical compounds for dispersing an oily layer on water
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/40—Devices for separating or removing fatty or oily substances or similar floating material
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/14—Maintenance of water treatment installations
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2305/00—Use of specific compounds during water treatment
- C02F2305/04—Surfactants, used as part of a formulation or alone
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Abstract
The present invention provides a purification method of wastewater in coal chemical industry. In the purification method, ethoxylated oleamine is added at a suction inlet of a circulating water pump at a coal gas water tank water outlet end located in a recovery circulation system of the wastewater in the coal chemical industry. By adding the ethoxylated oleamine, small liquid droplets in a dispersion phase of an emulsion gather into clusters to form large liquid droplets, finally, oil phase is separated from oil-water two-phases to reach the purpose of the purification, and the problems of device clogging, etc. in the recovery system are avoided.
Description
Technical field
The present invention discloses the technical field for being related to wastewater treatment, more particularly to a kind of purification side for coal chemical industrial waste water
Method.
Background technology
As people are for the gradually enhancing of environmental consciousness, in recent years, the wastewater treatment in Coal Chemical Industry production industry is also got over
More to be paid close attention to by people.In the past in Coal Chemical Industry manufacturing enterprise, the coal tar separating effect in ammonia and phenol water is extremely not
It is good, the yield of coal tar in liquid form product piece-rate system is not only affected, while can also affect the recovery system of ammonia and phenol water, lead
Tower tray fouling and clogging in recovery system is caused, the cost of overhaul that increased cleaning tower tray is used so that production can not be carried out continuously, and is increased
Producing cost input.Further, since tower tray blocking, can be significantly increased the heat consumption of Distallation systm, the production energy of equipment is reduced
Power, causes equipment corrosion, or even easily causes equipment high pressure, the problems such as lead to serious accident.
In order to solve the above problems, the method that Coal Chemical Industry manufacturing enterprise has attempted various wastewater process, more conventional side
Method is：Add the various medicaments separation coal-tar middle oil to realize waste water simultaneously in waste water reclamation blood circulation, although this kind of mode
Certain tar separation can be played a part of, but because the medicament kind for adding is more, make the waste water of Coal Chemical Industry manufacturing enterprise
Purification cost is improved, and causes conventional purification method for effluent to be difficult to carry out.
Therefore, a kind of new purification method for coal chemical industrial waste water how is researched and developed, the addition of purification medicament is reduced, is become
People's problem demanding prompt solution.
The content of the invention
In consideration of it, the present disclosure provides a kind of purification method for coal chemical industrial waste water, at least to solve conventional coal
When wastewater from chemical industry is purified, need the medicament kind for adding more, there is purification high cost, it is difficult to the problems such as practice and extension.
The technical scheme that the present invention is provided, specifically, a kind of purification method for coal chemical industrial waste water, the purification method tool
Body is：Add at the water circulating pump suction inlet of gas liquor groove water side in the recovery of circulatory system of the coal chemical industrial waste water
Oleyl amine polyoxyethylene ether.
It is preferred that, the addition of the oleyl amine polyoxyethylene ether account for quantity of circulating water in the recovery of circulatory system 1～
10ppm。
Further preferably, added in the recovery of circulatory system using high-pressure metering pump at the water circulating pump suction inlet
Enter oleyl amine polyoxyethylene ether.
Further preferably, added in the recovery of circulatory system of the coal chemical industrial waste water using gradually incremental addition manner
Oleyl amine polyoxyethylene ether.
Further preferably, the gradually incremental addition manner includes：
S1, add in the recovery of circulatory system and account for the oleyl amine of 1～3ppm of quantity of circulating water in the recovery of circulatory system
Polyoxyethylene ether, is kept for 10～15 days；
S2, add in the recovery of circulatory system and account for the oleyl amine of 3～5ppm of quantity of circulating water in the recovery of circulatory system
Polyoxyethylene ether, is kept for 25～30 days；
S3, add in the recovery of circulatory system and account for the oleyl amine of 5～10ppm of quantity of circulating water in the recovery of circulatory system
Polyoxyethylene ether, until the tar content described in the recovery of circulatory system in quantity of circulating water drop to original 20%～
30%.
Further preferably, positioned at the aqua ammonia pump of gas liquor groove water side in the recovery of circulatory system of the coal chemical industrial waste water
Or addition oleyl amine polyoxyethylene ether at the suction inlet of phenol water pump.
Further preferably, the addition of the oleyl amine polyoxyethylene ether accounts for quantity of circulating water in the recovery of circulatory system
0.5～1.5ppm.
Further preferably, positioned at the circulation of spray scrubber water inlet end in the recovery of circulatory system of the coal chemical industrial waste water
Pump Suction porch adds oleyl amine polyoxyethylene ether.
Further preferably, the addition of the oleyl amine polyoxyethylene ether account for quantity of circulating water in the blood circulation 2～
5ppm。
Provided by the present invention for the purification method of coal chemical industrial waste water, only in the water circulating pump positioned at gas liquor groove water side
Oleyl amine polyoxyethylene ether is added at suction inlet, because oleyl amine polyoxyethylene ether has " amphiphilic structure ", in gas liquor, oleyl amine gathers
Polar hydrophilic base and the polar water molecules of oxygen vinyl ether molecules attract strongly, and the suction of nonpolar hydrocarbon chain and polar water molecules
Gravitation is very weak, and the miscella adjacent with hydrocarbon chain has more hydrogen bonds than common ammonia or phenol water in gas liquor, so as to be conducive to
The ordered structure of miscella is formed, make maximum system energy raise and it is unstable, therefore tar molecules tend to oleyl amine polyoxyethylene ether is dredged
The hydrocarbon chain of water discharges the ammonia or phenol water environment of gas liquor.After concentration reaches, mutually aggregation forms kernel to hydrophobic hydrocarbon chain, parent
The polar group of water outwards, so, meets the requirement that tar material departs from water environment, meets oleyl amine polyoxyethylene ether and makees strongly with water
Requirement, in Thermodynamically stable state, then just forms tar group, and the little liquid pearl of the dispersion phase of emulsion is assembled into agglomerating shape
Into big drop, finally it is layered the water-oil phase in recirculated water and separates out, so as to reach purification purpose, and then avoids in recovery system
The problems such as equipment is blocked occurs.
Description of the drawings
Accompanying drawing herein is merged in description and constitutes the part of this specification, shows the enforcement for meeting the present invention
Example, and be used to explain the principle of the present invention together with description.
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
The accompanying drawing to be used needed for having technology description is briefly described, it should be apparent that, for those of ordinary skill in the art
Speech, without having to pay creative labor, can be with according to these other accompanying drawings of accompanying drawings acquisition.
Fig. 1 is the flow chart that the present invention discloses the waste water reclamation blood circulation used in embodiment.
Specific embodiment
Here exemplary embodiment will be illustrated in detail, its example is illustrated in the accompanying drawings.Explained below is related to
During accompanying drawing, unless otherwise indicated, the same numbers in different accompanying drawings represent same or analogous key element.Following exemplary embodiment
Described in embodiment do not represent and the consistent all embodiments of the present invention.Conversely, they be only with it is such as appended
The example of the consistent method of some aspects described in detail in claims, the present invention.
Present embodiment provides a kind of purification method for coal chemical industrial waste water, the purification method broken this area with
Past conventional thought, conventional those skilled in the art think, in the cleaning system of coal chemical industrial waste water, only by oleyl amine polyoxy second
After alkene ether and fatty amine coordinate by a certain percentage, the purpose of purification of waste water can be realized.However, inventor is through grinding for many years
Study carefully discovery, a kind of oleyl amine polyoxyethylene ether this composition is only added in waste water circulation system, can equally reach purification of waste water
Mesh, is positioned at the water circulating pump suction inlet of gas liquor groove water side in the recovery of circulatory system of coal chemical industrial waste water specifically
Place adds oleyl amine polyoxyethylene ether, by adding oleyl amine polyoxyethylene ether in this place, can make oleyl amine polyoxyethylene ether whole
Exist in recovery of circulatory system, realize useless water purification.
Wherein, oleyl amine polyoxyethylene ether has excellent emulsifying, dispersion, solubilising, antistatic, lubrication and corrosion inhibiting ability, this
It is outer that also there is certain sterilizing ability.Oleyl amine polyoxyethylene ether of the present invention is nonionic surfactant-polyethers
Type-amine gathers, after it mixes with the waste water in recovery of circulatory system, the polar hydrophilic base and polarity of oleyl amine polyoxyethylene ether molecule
Hydrone attracts strongly, and nonpolar hydrocarbon chain is very weak with the captivation of polar water molecules, adjacent with hydrocarbon chain in gas liquor
Miscella has more hydrogen bonds than common ammonia or phenol water, so as to the ordered structure for being conducive to miscella is formed, enables system
Amount is raised and unstable, therefore tar molecules tend to the hydrophobic hydrocarbon chain of oleyl amine polyoxyethylene ether to discharge ammonia or phenol water environment.When
After concentration reaches, mutually aggregation forms kernel to hydrophobic hydrocarbon chain, and hydrophilic polar group outwards, so, meets tar material disengaging
The requirement of water environment, meets the requirement of oleyl amine polyoxyethylene ether and water strong effect, in Thermodynamically stable state, then with regard to shape
Into tar group, the big drop of the agglomerating formation of the little liquid pearl aggregation of the dispersion phase of emulsion can finally be made the profit two in recirculated water
Mutually layering is separated out, so as to reach purification purpose.
Above-mentioned oleyl amine polyoxyethylene ether can adopt commercially available prod, it would however also be possible to employ oleyl amine and oxirane are logical as raw material
Cross conventional method synthesis, it is contemplated that breakdown of emulsion and dispersion effect, it is preferred to use purity be 95%～99% oleyl amine as synthesis
The raw material of oleyl amine polyoxyethylene ether.Present invention preferably employs oleyl amine polyoxyethylene ether 5EO～20EO, i.e., containing 5～20 epoxies
Ethane.If contained EO numbers are less than 5 in the oleyl amine polyoxyethylene ether for being adopted, undue lipophile occurs, cause light
Matter tar is recovered to problem excessive in heavy tar, so that reducing the yield of tar light oil；If oleyl amine Polyethylene oxide
The EO numbers of ether are higher than 20, then excessive hydrophilic occurs, cause tar moisture content too high, tar quality decline.Therefore, Jing is comprehensive
Close and consider, the present invention adopts oleyl amine polyoxyethylene ether 5EO～20EO, in being added into the recovery of circulatory system of coal chemical industrial waste water,
Coal tar and coal contained in ammonia, phenol water and the raw coke oven gas produced in Coal Chemical Industry production process can more efficiently be removed
Dirt.
It is preferred that, the addition of oleyl amine polyoxyethylene ether accounts for 1～10ppm of quantity of circulating water in recovery of circulatory system.
Specifically, oleyl amine polyoxy second is added in recovery of circulatory system using high-pressure metering pump at water circulating pump suction inlet
Alkene ether.The present invention is by being added to oleyl amine polyoxyethylene ether in recirculated water (ammonia or phenol water) Pump Suction Nozzle high-pressure metering pump
In recirculated water (ammonia or phenol water) recovery of circulatory system, the seriality that oleyl amine polyoxyethylene ether adds is can ensure that first so that
Coal tar is removed more thoroughly, secondly, using high-pressure metering pump oleyl amine polyoxyethylene ether is continuously pumped into, and is conducive to enterprise to even
The coal tar of continuous output is reclaimed incessantly, with higher organic efficiency.
There is preferable cleaning to act on the fouling deposited in recovery of circulatory system in view of oleyl amine polyoxyethylene ether, in order to
Avoid adding after oleyl amine polyoxyethylene ether due to the various cloggings caused by Rapid Cleaning, it is preferable that adopt and be gradually incremented by
Addition manner oleyl amine polyoxyethylene ether is added in the recovery of circulatory system of coal chemical industrial waste water.By the incipient stage it is slow and
Incrementally add oleyl amine polyoxyethylene ether, analyzing test data and ensureing that each heat exchanger and tower tray do not occur the premise for blocking
Under gradually step up the chemical feeding quantity of oleyl amine polyoxyethylene ether.This kind of purification method improves ammonia or coal tar and coal dust point in phenol water
The problem of tower tray blocking, the time between overhauls(TBO) of extension device and service life, tool in degree, effectively solving ammonia, phenol recovery system
There is the advantage that producing cost is low, energy consumption is low and production safety coefficient is high.
Specifically gradually incremental addition manner is：S1, add in recovery of circulatory system and account in recovery of circulatory system and follow
The oleyl amine polyoxyethylene ether of ring 1～3ppm of the water yield, is kept for 10～15 days；S2, in recovery of circulatory system add account for recovery circulation
The oleyl amine polyoxyethylene ether of 3～5ppm of quantity of circulating water in system, is kept for 25～30 days；And S3, in recovery of circulatory system plus
Enter to account for the oleyl amine polyoxyethylene ether of 5～10ppm of quantity of circulating water in recovery of circulatory system, until quantity of circulating water in recovery of circulatory system
In tar content drop to original 20%～30%.
For the coal-tar middle oil separating effect of the recovery of circulatory system for further improving coal chemical industrial waste water, changing as scheme
Enter, can be in the recovery of circulatory system of coal chemical industrial waste water at the aqua ammonia pump of gas liquor groove water side or the suction inlet of phenol water pump
Set up the chemical feeding points of an oleyl amine polyoxyethylene ether, realize the secondary addition of oleyl amine polyoxyethylene ether, further purification ammonia or
The sedimentation and separation of detached tar and quickening tar in ammonia or the big tank of phenol water is not fully cleaned up in phenol water.Wherein,
Addition of oleyl amine polyoxyethylene ether accounts for 0.5～1.5ppm of quantity of circulating water in recovery of circulatory system at this, it is preferred to use high pressure
Dosing pump is added.
In order to further improve the clean-up effect of waste water, the on-line cleaning number of times and alleviation for reducing equipment extends each spray
The duration of congestion of tower is drenched, as the improvement of scheme, can be entered positioned at spray scrubber in the recovery of circulatory system of coal chemical industrial waste water
Set up the chemical feeding points of an oleyl amine polyoxyethylene ether at the water circulating pump suction inlet of water end (W.E.) again, realize the three of oleyl amine polyoxyethylene ether
Secondary addition, further in purification ammonia or phenol water be not fully cleaned up detached tar and to accelerate tar big in ammonia or phenol water
Sedimentation and separation in tank, it is to avoid spray washing device needs Jing often to clean, holds susceptible to plugging problem, wherein, oleyl amine gathers at this
The addition of oxygen vinyl Ether accounts for 2～5ppm of quantity of circulating water in conversion spray tower systems, it is preferable that carry out adding using high-pressure metering pump
Enter.
The present invention is further explained with specific embodiment and is illustrated below.
Embodiment 1
It is phenol Water Sproading blood circulation in the cleaning shop of Xinjiang Coal Chemical Industry company limited, the blood circulation bag referring to Fig. 1
Include：Gasification furnace, spray cooler, waste heat boiler, spray scrubber, tar separator, oil eliminator, coal gas tank, gas liquor
Tank, phenol ammonia recovery unit, flotation tank, homogeneous pond, biochemistry pool, flocculation basin, first circulation water pump, second circulation water pump, phenol water pump,
Dilute phenol water pump, high pressure phenol water-circulating pump and two expansion apparatuss, wherein, the water side of gasification burner is entered with the first of spray cooler
Water end (W.E.) is connected, and the waste water after cooling is transported to the water inlet end of waste heat boiler by spray cooler from water side, and waste heat boiler will be useless
After part raw gas in water extract, the inlet end of spray scrubber is transported to, raw gas Jing spray scrubbers spray is washed
Collect after washing, as the energy, and the waste water in waste heat boiler is transported to the water inlet end of tar separator after expansion apparatuss,
Waste water goes out part dirt slag and tar separation through tar separator, and remaining waste water is via the water side quilt of tar separator
The water inlet end of oil eliminator is transported to, while after the waste water of the water side output of spray scrubber is via expansion apparatuss, also can convey
To the water inlet end of oil eliminator, part tar in the waste water that oil eliminator will be input into and in it is separating of oil after, by remaining waste water
Be transported to the water inlet end of coal gas tank, and the wastewater fraction in coal gas tank to be again fed to spray by first circulation water pump cold
But backwater purification is circulated in device, is partly transported in coal gas water pot by phenol water pump, and coal gas water pot is isolated by filtration
Out outside is discharged to by separating of oil in part, part tar is pumped into by oil tar sludge to carry out again at tar separator
Separation and recovery purification, the effluent part for still needing to purify is transported in spray scrubber by second circulation water pump and is sprayed
After washing, Recovery Purifying again is carried out, and the dilute phenol water pumps of satisfactory waste water Jing is transported in phenol retracting device,
Phenol Water Sproading, is then sequentially passing through flotation tank, homogeneous pond, biochemistry pool and flocculation basin, completes the final purification of waste water, is given up
The discharge of water.
The workshop begins to use the purification method of present invention offer from January, 2015 in July, 2015, i.e., in water circulating pump
(A points) adds oleyl amine polyoxyethylene ether at suction inlet, and specific addition manner is：The addition in recovery of circulatory system accounts for recovery and follows
The oleyl amine polyoxyethylene ether of 1～3ppm of quantity of circulating water in loop systems, is kept for 10～15 days；Add in recovery of circulatory system again and account for
The oleyl amine polyoxyethylene ether of 3～5ppm of quantity of circulating water in recovery of circulatory system, is kept for 25～30 days；Most backward recovery of circulatory system
It is middle to add the oleyl amine polyoxyethylene ether for accounting for 5～10ppm of quantity of circulating water in recovery of circulatory system, until circulating in recovery of circulatory system
Tar content in the water yield drops to original 20%～30%.
Start the chemical feeding points that at phenol water pump suction inlet (B points) sets up an oleyl amine polyoxyethylene ether from August, 2015, should
The addition of oleyl amine polyoxyethylene ether accounts for 0.5～1.5ppm of quantity of circulating water in recovery of circulatory system in chemical feeding points.
Start at the water circulating pump suction inlet of spray scrubber water inlet end (C points) from January, 2016 and set up an oleyl amine
The chemical feeding points of polyoxyethylene ether, the addition of oleyl amine polyoxyethylene ether accounts for quantity of circulating water in recovery of circulatory system in the chemical feeding points
2～5ppm.
Containing substantial amounts of float and coal tar, muddy stain, from January, 2015 to 2015 in waste water before non-dosing
July adds oleyl amine polyoxyethylene ether in the suction inlet of circulating pump, and after purifying 6 months, the color of waste water is transparent, and coal tar contains
It is extremely low that amount meets national wastewater discharge standard content；Start using 2 dosings from August, 2015, after purifying 1 month, waste water
Color is transparent, and coal tar is substantially free of in waste water；Start to adopt 3 dosings from January, 2016, not only the face of waste water
Color is transparent, and coal tar content meets that national wastewater discharge standard content is extremely low, and the cleaning frequency of spray scrubber is bright
Aobvious to lengthen, without cleaning in substantially a week before dosing, twice, and when arranging a chemical feeding points, half a year cleans once, arranges two
After chemical feeding points, cleaning in 8 months once, and is arranged after three chemical feeding points, and from August, 2015 the clear of equipment need not be all carried out so far
Wash.
Coal tar to being finally recovered out in embodiment 1 is detected, during in January, 2015 in July, 2015, is found
The coal tar moisture content isolated is reduced to 0.6～1.0% by conventional 4%～5%, and from August, 2015, coal tar contains
Water rate is reduced to 0.2%～0.4%, and in January, 2016, coal tar moisture content is reduced to 0.05%～0.1%.
Wherein, provide in the present embodiment for phenol water reclamation system, and for ammonia water recovery system, by phenol water therein
Pump, dilute phenol water pump replace with aqua ammonia pump and weak ammonia pump.
Case study on implementation 2
Since running after the general overhaul of in November, 2015 of Xinjiang New Coal Chemical company coal gas water process workshop, due to front
Screening plant before the newly-increased standby coal stove of system, fume amount is relative to be reduced, but does not wash in the gas liquor produced by coal gas oil, dirt still not
Can efficiently separate, from after November operation, cause just tar separator congregate volume of smoke, affect the safety of whole system
Operation.
Early stage, workshop is processed by production division's requirement by drawing dirt car that standby coal will be transported to outside coal dust；In January 28 in 2016
Day separates ABCD series J02 pump intakes pipeline in gas liquor respectively increases compound pump to high coal powder injection air water dosing；In EF areas J05 phenol
Pump entrance pipeline increases compound pump to phenol recovery ammonia product gas liquor dosing.On 2 26th, 2016 at the beginning of gas liquor ABCD areas
Tar separator and final oil eliminator bottom find a large amount of dust-laden tar, and polynary hydrocarbon yield is significantly increased compared with last year, the April
Polynary hydrocarbon total output is 3117 tons, and 4.5 times of yield is increased over the same period last year.While product yield relative increase, gas liquor
Detached labor intensity and site environment have also obtained relative change, are analyzed as follows；
1st, before dosing, because oil, dirt can not separated, each groove tank of system needs frequent clean (will open within substantially 20 days or so
First tar separator), scene is flooded with substantial amounts of toxic and harmful；Plus after oleyl amine polyoxyethylene ether, delayed cleaning frequency,
Reduce live pollution.
2nd, after dosing, phenol recovery ammonia C05/C06/C07 the two month normal operation of heat exchanger reduces the cleaning of heat exchanger
Frequency.
3rd, before dosing, the polynary hydrocarbon yield of the first quarter in 2015 is 2480 tons, the polynary hydrocarbon yield first quarter in 2016 after dosing
6285 tons.
Because dirt can be efficiently separated with oil in gas liquor, it is sent to dust content in the gas liquor water quality of gasification conversion and significantly subtracts
It is few.
Embodiment 3
Inner Mongol Lan Tan coke-oven plants tar moisture content is higher, cyclic ammonia water turbidity high and contains a certain amount of tar, institute
The series of problems for bringing annoyings always the production of recovery workshop and coking workshop, using old-fashioned production technology and equipment,
How to improve the quality of tar and cyclic ammonia water also just becomes the important problem that enterprise is faced at present.
, when kilter is reached, 4% or so, the separating effect of ammonia water and tar oil is bad, then can for moisture content for quality of coke tar
The quality for making cyclic ammonia water synchronously declines, and causes equipment scaling blocking in the blocking of coke oven ammonia spray nozzle and its system, affects waste coal
Air cooling effect；Remained ammonia quality also synchronously declines, and causes ammonia still, the blocking of dephenolize tower, while ammonia, the recovery of phenol are affected,
Also tar moisture content can be made too high, the heat consumption of Distallation systm is significantly increased, reduce equipment capacity, increase equipment corrosion.
At present, Inner Mongol Lan Tan coke-oven plants tar purifying adopts ultracentrifuge tertiary treatment, and ammonia purification is using burnt
Floating tar remover of carbon filter, vapour etc., to reach the purpose of purification ammonia, but the effect of its ammonia purification is not very good,
The nozzle choking problems of coking workshop and the deposition problems of ammonia subsequent production still cannot be resolved.
Dehydration of tar agent has excellent breakdown of emulsion function, and mechanization is entered with a kind of emulsified state in tar and cyclic ammonia water
During defecator, ammonia and tar can be relatively easy to and separate inside mechanical settling tank, although this to separate comparatively fast, but
Still there is an emulsion layer comprising tar, coal dust, coke powder and ammonia in mechanical settling tank, because in actual behaviour
There can not possibly be enough time of staying in work, so often having impurity and ammonia in some emulsions to leave mechanization together
Defecator, dehydration of tar agent can destroy this poised state in emulsion layer, strengthen separating effect, such that it is able to obtain more
Plus little emulsion layer, entrainment is farthest reduced into the possibility of cyclic ammonia water.
Due to oleyl amine polyoxyethylene ether be it is a kind of it is outstanding subtract binding agent, it can be in the tunic of Surface Creation one of tar, drop
The surface tension of low tar so that the viscosity of tar is substantially reduced, this also causes the mobility of tar to strengthen, and is less prone to bonding
On equipment.
Inner Mongol Lan Tan coke-oven plants start in the water circulating pump suction inlet positioned at gas liquor groove water side in January, 2016
Addition oleyl amine polyoxyethylene ether, experimental result is as follows：
Carry out at the scene achieving good effect in experiment in seven months, concrete effect is as follows：
1st, the coal-tar middle oil content of ammonia drops to 178.3mg/l by 1420.7mg/l, and rate of descent is 87%；Float in ammonia
Content drops to 290.1mg/l by average 1602.1mg/l, and rate of descent is 81.9%；
2nd, the moisture content of medial launder drops to 4.37% from average 8.98%, declines 51.2%；Tar storage tank it is aqueous
Rate drops to 3.30% from average 4.39%, averagely declines 24.8%.
3rd, tar yield averagely improves 0.028%, while tar yield increases 45.8t per monthly average；
4th, the material such as dregs of fat in system also obtains substantial amounts of cleaning, and 200 tons or so of tar slag is cleared out altogether；
5th, be conducive to the production of coking workshop, reduce the clear discharge frequency, conventional every month is clear 2 times, now per half
Year is clear 1 time；
After the addition of oleyl amine polyoxyethylene ether, be conducive to dephenolize and ammonia still process production direct motion, bring huge ring
Protect benefit；Because tar water is reduced, tar sump water volume is reduced, and saves steam consumption；The materials such as the dregs of fat in system are also obtained
To substantial amounts of cleaning, primary cooler and raw gas temperature are improved；Because tar water is reduced, tar sump water volume reduces section
Steam consumption is saved, pollution of the evaporation of naphthalene to air is reduced；Remained ammonia Quality advance, oil content is reduced, and ammonia becomes limpid,
Be conducive to later stage ammonia treatment；Ammonia spray nozzle is no longer blocked, and reduces maintenance cost, advantageously reduces that coal gas is coal-tar middle oil and naphthalene contains
Amount.Gas temperature is reduced, the coal gas throughput increase in limited space；Tar viscosity is reduced, and improves mobility, improves tar
Quality (naphthalene content is improved more than 3 points)；The pipeline of ammonia circulation system is substantially cleaned, and tar slag is cleared up；Ammonia
Pump rotating vane tar is cleared up, and lowers workload, is increased the service life；Ammonia oil-containing is reduced, and reduces the burnt band of ammonia breath
The tar abnormal smells from the patient for coming；More improvement are brought to follow-up all links of recovery workshop and reduce potential safety hazard, reduce workman's labor
Fatigue resistance.
Those skilled in the art will readily occur to its of the present invention after considering description and putting into practice invention disclosed herein
Its embodiment.The application is intended to any modification of the present invention, purposes or adaptations, these modifications, purposes or
Person's adaptations follow the general principle of the present invention and including the undocumented common knowledge in the art of the present invention
Or conventional techniques.Description and embodiments are considered only as exemplary, and true scope and spirit of the invention are by following
Claim is pointed out.
It should be appreciated that the precision architecture for being described above and being shown in the drawings is the invention is not limited in, and
And can without departing from the scope carry out various modifications and changes.The scope of the present invention is only limited by appended claim.
Claims (9)
1. a kind of purification method for coal chemical industrial waste water, it is characterised in that in the recovery of circulatory system of the coal chemical industrial waste water
In be located at gas liquor groove water side water circulating pump suction inlet at add oleyl amine polyoxyethylene ether.
2. the purification method of coal chemical industrial waste water is used for according to claim 1, it is characterised in that the oleyl amine polyoxyethylene ether
Addition account for 1～10ppm of quantity of circulating water in the recovery of circulatory system.
3. the purification method of coal chemical industrial waste water is used for according to claim 1, it is characterised in that in water circulating pump suction
Oleyl amine polyoxyethylene ether is added in the recovery of circulatory system using high-pressure metering pump at mouthful.
4. the purification method of coal chemical industrial waste water is used for according to claim 3, it is characterised in that using gradually incremental addition
Mode adds oleyl amine polyoxyethylene ether in the recovery of circulatory system of the coal chemical industrial waste water.
5. the purification method of coal chemical industrial waste water is used for according to claim 4, it is characterised in that the gradually incremental addition
Mode includes：
S1, add in the recovery of circulatory system and account for the oleyl amine polyoxy of 1～3ppm of quantity of circulating water in the recovery of circulatory system
Vinyl Ether, is kept for 10～15 days；
S2, add in the recovery of circulatory system and account for the oleyl amine polyoxy of 3～5ppm of quantity of circulating water in the recovery of circulatory system
Vinyl Ether, is kept for 25～30 days；
S3, add in the recovery of circulatory system and account for the oleyl amine polyoxy of 5～10ppm of quantity of circulating water in the recovery of circulatory system
Vinyl Ether, until the tar content described in the recovery of circulatory system in quantity of circulating water drops to original 20%～30%.
6. the purification method of coal chemical industrial waste water is used for according to Claims 1 to 5 is arbitrary, it is characterised in that in the coalification
Oleyl amine is added to gather at the aqua ammonia pump of gas liquor groove water side or the suction inlet of phenol water pump in the recovery of circulatory system of work waste water
Oxygen vinyl Ether.
7. the purification method of coal chemical industrial waste water is used for according to claim 6, it is characterised in that the oleyl amine polyoxyethylene ether
Addition account for 0.5～1.5ppm of quantity of circulating water in the recovery of circulatory system.
8. the purification method of coal chemical industrial waste water is used for according to Claims 1 to 5 or 6 are arbitrary, it is characterised in that in the coal
It is located in the recovery of circulatory system of wastewater from chemical industry at the water circulating pump suction inlet of spray scrubber water inlet end and adds oleyl amine polyoxy second
Alkene ether.
9. the purification method of coal chemical industrial waste water is used for according to claim 8, it is characterised in that the oleyl amine polyoxyethylene ether
Addition account for 2～5ppm of quantity of circulating water in the blood circulation.
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