CN106630090B - A kind of purification method for coal chemical industrial waste water - Google Patents
A kind of purification method for coal chemical industrial waste water Download PDFInfo
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- CN106630090B CN106630090B CN201710169855.0A CN201710169855A CN106630090B CN 106630090 B CN106630090 B CN 106630090B CN 201710169855 A CN201710169855 A CN 201710169855A CN 106630090 B CN106630090 B CN 106630090B
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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 kind of purification methods for coal chemical industrial waste water, oleyl amine polyoxyethylene ether is added in the purification method in the recovery of circulatory system of coal chemical industrial waste water at the water circulating pump suction inlet of coal gas sink water outlet, the small liquid pearl of the dispersed phase of emulsion can be assembled to the agglomerating big drop of formation by the oleyl amine polyoxyethylene ether of addition, it is finally layered the water-oil phase in recirculated water to be precipitated, to reach purification purpose, and then avoid the problems such as equipment blocks in recovery system.
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 technique
With people's gradually increasing for environmental consciousness, in recent years, the wastewater treatment in coal chemical industry production industry is also got over
To be more concerned by people.In the past in coal chemical industry manufacturing enterprise, the coal tar separating effect in ammonium hydroxide and phenol water is extremely not
It is good, the yield of coal tar in liquid form product separation system is not only influenced, while also will affect the recovery system of ammonium hydroxide and phenol water, led
Tower tray fouling blockage in recovery system is caused, the maintenance expense of cleaning tower tray is increased, so that production can not be carried out continuously, is increased
Producing cost investment.In addition, will increase dramatically the heat consumption of Distallation systm since tower tray blocks, reducing the production energy of equipment
Power causes equipment to be corroded, or even the problems such as be easy to cause equipment high pressure, lead to serious accident.
To solve the above-mentioned problems, the method that coal chemical industry manufacturing enterprise has attempted various wastewater processing, more common side
Method are as follows: various medicaments are added to realize the separation of tar in waste water simultaneously in the Sewage treatment circulatory system, although this kind of mode
It can play the role of certain tar separation, but since the medicament kind of addition is more, make the waste water of coal chemical industry manufacturing enterprise
It purifies cost to improve, previous purification method for effluent is caused to be difficult to carry out.
Therefore, a kind of novel purification method for coal chemical industrial waste water how is researched and developed, the addition of purification medicament is reduced, becomes
People's urgent problem to be solved.
Summary 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 previous coal
When wastewater from chemical industry purifies, the medicament kind for needing to be added is more, it is at high cost to there is purification, it is difficult to the problems such as practice and extension.
Technical solution provided by the invention, specifically, a kind of purification method for coal chemical industrial waste water, purification method tool
Body are as follows: be added at the water circulating pump suction inlet of coal gas sink water outlet in the recovery of circulatory system of the coal chemical industrial waste water
Oleyl amine polyoxyethylene ether.
It is preferred that the additional amount of the oleyl amine polyoxyethylene ether account for quantity of circulating water in the recovery of circulatory system 1~
10ppm。
Further preferably, added using high-pressure metering pump into the recovery of circulatory system at the water circulating pump suction inlet
Enter oleyl amine polyoxyethylene ether.
Further preferably, the addition manner that use is gradually incremented by is added into the recovery of circulatory system of the coal chemical industrial waste water
Oleyl amine polyoxyethylene ether.
Further preferably, the addition manner being gradually incremented by includes:
The oleyl amine for accounting for 1~3ppm of quantity of circulating water in the recovery of circulatory system is added in S1, Xiang Suoshu recovery of circulatory system
Polyoxyethylene ether is kept for 10~15 days；
The oleyl amine for accounting for 3~5ppm of quantity of circulating water in the recovery of circulatory system is added in S2, Xiang Suoshu recovery of circulatory system
Polyoxyethylene ether is kept for 25~30 days；
The oleyl amine for accounting for 5~10ppm of quantity of circulating water in the recovery of circulatory system is added in S3, Xiang Suoshu 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, the aqua ammonia pump of coal gas sink water outlet is located in the recovery of circulatory system of the coal chemical industrial waste water
Or oleyl amine polyoxyethylene ether is added at the suction inlet of phenol water pump.
Further preferably, the additional amount of the oleyl amine polyoxyethylene ether accounts for quantity of circulating water in the recovery of circulatory system
0.5~1.5ppm.
Further preferably, the circulation of spray scrubber water inlet end is located in the recovery of circulatory system of the coal chemical industrial waste water
Oleyl amine polyoxyethylene ether is added in Pump Suction inlet.
Further preferably, the additional amount of the oleyl amine polyoxyethylene ether account for quantity of circulating water in the circulatory system 2~
5ppm。
Provided by the present invention for the purification method of coal chemical industrial waste water, only in the water circulating pump for being located at gas liquor slot water outlet
Oleyl amine polyoxyethylene ether is added at suction inlet, since oleyl amine polyoxyethylene ether has " amphiphilic structure ", in gas liquor, oleyl amine is poly-
The polar hydrophilic base of ethylene oxide ether molecule attracts strongly with polar water molecules, 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 ammonium hydroxide or phenol water in gas liquor, to be conducive to
The ordered structure of miscella is formed, make maximum system energy increase and it is unstable, therefore tar molecules trend oleyl amine polyoxyethylene ether is dredged
The ammonium hydroxide or phenol water environment of the hydrocarbon chain discharge gas liquor of water.After concentration reaches, hydrophobic hydrocarbon chain, which is assembled mutually, forms kernel, parent
The polar group of water is outside, in this way, meeting the requirement that tar material is detached from water environment, meets oleyl amine polyoxyethylene ether and makees strongly with water
It is required that being in thermodynamic stability, tar group is then just formed, the small liquid pearl of the dispersed phase of emulsion is assembled into agglomerating shape
At big drop, finally it is layered the water-oil phase in recirculated water and is precipitated, to reach purification purpose, and then avoid in recovery system
The problems such as equipment blocks.
Detailed description of the invention
The drawings herein are incorporated into the specification and forms part of this specification, and shows and meets implementation of the invention
Example, and be used to explain the principle of the present invention together with specification.
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, for those of ordinary skill in the art
Speech, without any creative labor, is also possible to obtain other drawings based on these drawings.
Fig. 1 is the flow chart that the present invention discloses the Sewage treatment circulatory system used in embodiment.
Specific embodiment
Example embodiments are described in detail here, and the example is illustrated in the accompanying drawings.Following description is related to
When attached drawing, unless otherwise indicated, the same numbers in different drawings indicate the same or similar elements.Following exemplary embodiment
Described in embodiment do not represent all embodiments consistented with the present invention.On the contrary, they be only with it is such as appended
The example of method being described in detail in claims, some aspects of the invention are consistent.
Present embodiment provides a kind of purification method for coal chemical industrial waste water, the purification method broken this field with
Past conventional thought, previous those skilled in the art think, in the purification system of coal chemical industrial waste water, only by oleyl amine polyoxy second
After alkene ether and fatty amine cooperate by a certain percentage, the purpose of purification of waste water can be realized.However, inventor's grinding by many years
Study carefully discovery, a kind of this ingredient of oleyl amine polyoxyethylene ether is only added in the waste water circulatory system, equally can achieve purification of waste water
Mesh is specifically the water circulating pump suction inlet for being located at coal gas sink water outlet in the recovery of circulatory system of coal chemical industrial waste water
Oleyl amine polyoxyethylene ether is added in place, by the way that oleyl amine polyoxyethylene ether is added at this, oleyl amine polyoxyethylene ether can be made entire
Exist in recovery of circulatory system, realizes the purification of waste water.
Wherein, oleyl amine polyoxyethylene ether has excellent emulsification, dispersion, solubilising, antistatic, lubrication and corrosion inhibiting ability, this
Also there is certain sterilizing ability outside.Oleyl amine polyoxyethylene ether of the present invention is nonionic surface active agent-polyethers
Type-amine is poly-, after it is mixed 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 and the attraction of polar water molecules are very weak, adjacent with hydrocarbon chain in gas liquor
Miscella than common ammonium hydroxide or phenol water there are more hydrogen bonds to enable system so that the ordered structure for being conducive to miscella is formed
Amount increases and unstable, therefore tar molecules tend to the hydrocarbon chain discharge ammonium hydroxide or phenol water environment that oleyl amine polyoxyethylene ether is hydrophobic.When
After concentration reaches, hydrophobic hydrocarbon chain, which is assembled mutually, forms kernel, and hydrophilic polar group is outside, in this way, meeting tar material disengaging
The requirement of water environment meets the requirement of oleyl amine polyoxyethylene ether Yu water strong effect, thermodynamic stability is in, then with regard to shape
At tar group, the agglomerating big drop of formation of the small liquid pearl aggregation of the dispersed phase of emulsion can finally be made the grease two in recirculated water
Mutually layering is precipitated, to reach purification purpose.
Above-mentioned oleyl amine polyoxyethylene ether can use commercial product, can also be logical as raw material using oleyl amine and ethylene oxide
Cross conventional method synthesis, it is contemplated that demulsification and dispersion effect, it is preferred to use the oleyl amine that purity is 95%~99% is as synthesis
The raw material of oleyl amine polyoxyethylene ether.Present invention preferably employs oleyl amine polyoxyethylene ether 5EO~20EO, that is, contain 5~20 epoxies
Ethane.It if EO number contained in used oleyl amine polyoxyethylene ether is lower than 5, will appear excessive lipophilicity, cause light
Matter tar is recovered to problem excessive in heavy tar, so that reducing the yield of tar light oil；If oleyl amine polyoxyethylene
The EO number of ether is higher than 20, then will appear excessive hydrophily, cause tar moisture content excessively high, tar quality decline.Therefore, through comprehensive
It closing and considers, the present invention uses oleyl amine polyoxyethylene ether 5EO~20EO, it is added into the recovery of circulatory system of coal chemical industrial waste water,
Coal tar and coal contained in the ammonium hydroxide generated in coal chemical industry production process, phenol water and raw coke oven gas can more efficiently be removed
Dirt.
It is preferred that the additional amount 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 into recovery of circulatory system using high-pressure metering pump at water circulating pump suction inlet
Alkene ether.Oleyl amine polyoxyethylene ether by being added in recirculated water (ammonium hydroxide or phenol water) Pump Suction Nozzle with high-pressure metering pump by the present invention
In recirculated water (ammonium hydroxide or phenol water) recovery of circulatory system, it can guarantee the continuity of oleyl amine polyoxyethylene ether addition first, so that
Coal tar removing is more thorough, secondly, being continuously pumped into oleyl amine polyoxyethylene ether using high-pressure metering pump, is conducive to enterprise to even
The coal tar of continuous output is recycled incessantly, has higher recovery efficiency.
In view of oleyl amine polyoxyethylene ether has preferable cleaning effect to the fouling deposited in recovery of circulatory system, in order to
Avoid be added oleyl amine polyoxyethylene ether after the various cloggings due to caused by Rapid Cleaning, it is preferable that use is gradually incremented by
Addition manner oleyl amine polyoxyethylene ether is added into the recovery of circulatory system of coal chemical industrial waste water.By the incipient stage slowly and
Oleyl amine polyoxyethylene ether is incrementally added, in analysis test data and guarantees the premise that each heat exchanger and tower tray do not block
Under the dosage of oleyl amine polyoxyethylene ether is gradually increased.This kind of purification method improves ammonium hydroxide or coal tar and coal dust point in phenol water
From degree, effectively solves the problems, such as ammonia, tower tray blocking in phenol recovery system, extend time between overhauls(TBO) and the service life of equipment, have
There is the advantage that producing cost is low, low energy consumption and production safety coefficient is high.
The addition manner being specifically gradually incremented by are as follows: S1, be added to account in recovery of circulatory system into recovery of circulatory system and follow
The oleyl amine polyoxyethylene ether of 1~3ppm of ring water is kept for 10~15 days；S2, it is added to account for into recovery of circulatory system and recycles circulation
The oleyl amine polyoxyethylene ether of 3~5ppm of quantity of circulating water in system is kept for 25~30 days；And S3, into 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%.
The separating effect of tar in recovery of circulatory system in order to further increase coal chemical industrial waste water, as changing for scheme
Into, can in the recovery of circulatory system of coal chemical industrial waste water positioned at coal gas sink water outlet aqua ammonia pump or phenol water pump suction inlet at
Add the chemical feeding points of an oleyl amine polyoxyethylene ether, realize the secondary addition of oleyl amine polyoxyethylene ether, further purify ammonium hydroxide or
The sedimentation and separation of the tar for not being fully cleaned up separation and quickening tar in ammonium hydroxide or the big tank of phenol water in phenol water.Wherein,
Additional amount 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
Metering pump is added.
In order to further increase the clean-up effect of waste water, reducing the on-line cleaning number of equipment and alleviate each spray of extension
The duration of congestion for drenching tower, as the improvement of scheme, can be located in the recovery of circulatory system of coal chemical industrial waste water spray scrubber into
The chemical feeding points of an oleyl amine polyoxyethylene ether are added at the water circulating pump suction inlet of water end (W.E.) again, realize the three of oleyl amine polyoxyethylene ether
Secondary addition, the further tar for not being fully cleaned up separation purified in ammonium hydroxide or phenol water and quickening tar are big in ammonium hydroxide or phenol water
The problem of sedimentation and separation in tank avoid spray washing device from needing often cleaning, are easy blocking, wherein oleyl amine is poly- at this
The additional amount of ethylene oxide ether accounts for 2~5ppm of quantity of circulating water in transformation spray tower systems, it is preferable that is added using high-pressure metering pump
Enter.
The present invention is further explained and is illustrated with specific embodiment below.
Embodiment 1
Referring to phenol water recovery of circulatory system in the cleaning shop that Fig. 1 is Xinjiang coal chemical industry Co., Ltd, the circulatory system packet
It includes: gasification furnace, spray cooler, waste heat boiler, spray scrubber, tar separator, oil eliminator, coal gas sink, 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 expanders, wherein the first of the water outlet of gasification burner and spray cooler into
Waste water after cooling is transported to the water inlet end of waste heat boiler by water end (W.E.) connection, spray cooler from water outlet, and waste heat boiler will give up
After part raw gas in water is extract, it is transported to the inlet end of spray scrubber, raw gas is washed through spray scrubber spray
It is collected after washing, is used as the energy, and the waste water in waste heat boiler is transported to the water inlet end of tar separator after expander,
Waste water goes out part dirt slag and tar separation by tar separator, and remaining waste water is via the water outlet quilt of tar separator
It is transported to the water inlet end of oil eliminator, while after the waste water of the water outlet output of spray scrubber is via expander, can also convey
To the water inlet end of oil eliminator, oil eliminator by the waste water of input part tar and middle oil separation after, by remaining waste water
It is transported to the water inlet end of coal gas sink, and by first circulation water pump to be again fed to spray cold for the wastewater fraction in coal gas sink
But circulating backwater purification is carried out in device, is partially transported in coal gas water pot by phenol water pump, and coal gas water pot is isolated by filtration
Oil in part is separated, outside is discharged to, part tar is transported at tar separator by tar dredge pump and is carried out again
Separation and recovery purification, the effluent part for still needing to purification is transported in spray scrubber by second circulation water pump and sprays
After washing, Recovery Purifying again is carried out, and satisfactory waste water is transported in phenol recyclable device through dilute phenol water pump,
Then the recycling of phenol water is successively passing through flotation tank, homogeneous pond, biochemistry pool and flocculation basin, is completing the final purification of waste water, carry out useless
The discharge of water.
The workshop begins to use purification method provided by the invention from January, 2015 in July, 2015, i.e., in water circulating pump
Oleyl amine polyoxyethylene ether, specific addition manner is added in (A point) at suction inlet are as follows: into recovery of circulatory system, addition accounts for recycling and follows
The oleyl amine polyoxyethylene ether of 1~3ppm of quantity of circulating water in loop system is kept for 10~15 days；It is added and accounts for into recovery of circulatory system again
The oleyl amine polyoxyethylene ether of 3~5ppm of quantity of circulating water in recovery of circulatory system is kept for 25~30 days；Finally to recovery of circulatory system
It is middle that the oleyl amine polyoxyethylene ether for accounting for 5~10ppm of quantity of circulating water in recovery of circulatory system is added, until being recycled in recovery of circulatory system
Tar content in water drops to original 20%~30%.
(B point) adds the chemical feeding points of an oleyl amine polyoxyethylene ether at phenol water pump suction inlet since in the August, 2015, should
The additional amount 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.
(C point) adds an oleyl amine at the water circulating pump suction inlet of spray scrubber water inlet end since in the January, 2016
The chemical feeding points of polyoxyethylene ether, the additional amount of oleyl amine polyoxyethylene ether accounts for quantity of circulating water in recovery of circulatory system in the chemical feeding points
2~5ppm.
Contain a large amount of suspended matter and coal tar, muddy stain, from January, 2015 to 2015 before non-dosing in waste water
Oleyl amine polyoxyethylene ether is added in the suction inlet of circulating pump in July, after purification 6 months, the color of waste water be it is transparent, coal tar contains
It is extremely low that amount meets national wastewater discharge standard content；Two o'clock dosing is used since in the August, 2015, after purification 1 month, waste water
Color be it is transparent, coal tar is substantially free of in waste water；3 dosings are used since in the January, 2016, not only the face of waste water
Color be it is transparent, 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 one week before dosing, twice, and when one chemical feeding points of setting, half a year cleaning is primary, is arranged two
After chemical feeding points, cleaning in 8 months is primary, and after three chemical feeding points are set, from August, 2015 so far all without carrying out the clear of equipment
It washes.
The coal tar being finally recovered out in embodiment 1 is detected, from January, 2015 to during in July, 2015, is found
The coal tar moisture content isolated is reduced to 0.6~1.0% by previous 4%~5%, and since in 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, providing in the present embodiment is 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 aqua ammonia pump.
Case study on implementation 2
Since being run after the general overhaul in November, 2015 of Xinjiang New Coal Chemical company coal gas water process workshop, due to preceding
Screening plant before the newly-increased standby coal stove of system, fume amount is opposite to be reduced, but does not wash in gas liquor caused by coal gas oil, dirt still not
It can efficiently separate, from after operation in November, cause just tar separator congregate volume of smoke, influence the safety of whole system
Operation.
Early period, workshop are handled by production division's requirement by drawing dirt vehicle that will be transported to standby coal outside coal dust；January 28 in 2016
Day increases compound pump to high coal powder injection air water dosing in gas liquor separation ABCD series J02 pump intake pipeline respectively；In the area EF J05 phenol
Pump entrance pipeline increases compound pump to phenol recovery ammonia product gas liquor dosing.On 2 26th, 2016 at the beginning of the area gas liquor ABCD
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, increases by 4.5 times of yield over the same period last year.While product yield relative increase, gas liquor
Isolated labor intensity and site environment has also obtained opposite change, is analyzed as follows；
1, before dosing, since oil, dirt can not separate, each groove tank of system needs frequent clean (will open within substantially 20 days or so
First tar separator), scene is flooded with a large amount of toxic and harmful gas；After oiling amine polyoxyethylene ether, delay cleaning frequency,
Reduce live pollution.
2, after dosing, phenol recovery ammonia C05/C06/C07 the two month normal operation of heat exchanger reduces the cleaning of heat exchanger
Frequency.
3, 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.
Since dirt can be efficiently separated with oil in gas liquor, it is sent to dust content in the gas liquor water quality of gasification transformation and substantially subtracts
It is few.
Embodiment 3
The Inner Mongol coke-oven plant Lan Tan tar moisture content is higher, cyclic ammonia water turbidity is high and contains a certain amount of tar, institute
Bring a series of problems annoyings always the production of recovery workshop and coking workshop, using old-fashioned production technology and equipment,
The quality for how improving tar and cyclic ammonia water also just becomes the important problem that enterprise is faced at present.
For quality of coke tar when reaching kilter, for moisture content 4% or so, the separating effect of ammonia water and tar oil is bad, then can
Make the synchronous decline of the quality of cyclic ammonia water, leads to equipment scaling blocking in the blocking of coke oven ammonia spray nozzle and its system, influence waste coal
Air cooling effect；The also synchronous decline of remained ammonia quality, leads to ammonia still, the blocking of dephenolize tower, while influencing the recycling of ammonia, phenol,
Also tar moisture content can be made excessively high, the heat consumption of Distallation systm is significantly increased, reduce equipment capacity, increase equipment corrosion.
Currently, the Inner Mongol coke-oven plant Lan Tan tar purifying uses ultracentrifuge tertiary treatment, ammonium hydroxide purification is using burnt
Carbon filter, vapour float tar remover etc., and to achieve the purpose that purify ammonium hydroxide, but the effect is not very satisfactory for the purification of its ammonium hydroxide,
The nozzle choking problems of coking workshop and the deposition problems of ammonium hydroxide subsequent production are still unable to get solution.
Dehydration of tar agent has excellent demulsification function, enters mechanization in tar and cyclic ammonia water with a kind of emulsified state
Ammonium hydroxide and tar, which can be relatively easy to, when defecator, inside mechanical settling tank separates, although this separation is very fast,
Still remained in mechanical settling tank one comprising tar, coal dust, coke powder and ammonium hydroxide emulsion layer because in actual behaviour
There can not be enough residence times in work, so the impurity and ammonium hydroxide that often have in some emulsions leave mechanization together
Defecator, dehydration of tar agent can destroy this equilibrium state in emulsion layer, reinforce separating effect, so as to obtain more
Add small emulsion layer, reduces the possibility that entrainment enters cyclic ammonia water to the greatest extent.
Due to oleyl amine polyoxyethylene ether be it is a kind of it is outstanding subtract binder, it can be dropped in one tunic of Surface Creation of tar
The surface tension of low tar, so that the viscosity of tar substantially reduces, this is less prone to bond but also the mobility of tar enhances
In equipment.
The Inner Mongol coke-oven plant Lan Tan starts in January, 2016 in the water circulating pump suction inlet for being located at gas liquor slot water outlet
Oleyl amine polyoxyethylene ether is added, experimental result is as follows:
It carries out achieving good effect in experiment in seven months at the scene, specific effect is as follows:
1, tar content by 1420.7mg/l drops to 178.3mg/l, rate of descent 87% in ammonium hydroxide；Suspended matter in ammonium hydroxide
Content drops to 290.1mg/l, rate of descent 81.9% by average 1602.1mg/l；
2, the moisture content of medial launder drops to 4.37% from average 8.98%, decline 51.2%；Tar storage tank it is aqueous
Rate drops to 3.30% from average 4.39%, averagely declines 24.8%.
3, tar yield averagely improves 0.028%, while the every monthly average of tar yield increases 45.8t；
4, the substances such as dregs of fat in system are also largely cleared up, and clear out 200 tons of tar slag or so altogether；
5, the production for being conducive to coking workshop reduces the clear gas collecting tube frequency, clear 2 times of previous every month, now per half
Clear 1 time of year；
After addition by oleyl amine polyoxyethylene ether, is conducive to dephenolize and ammonia still process production direct motion, brings huge ring
Protect benefit；Since tar water reduces, tar sump water volume is reduced, and saves steam consumption；The substances such as the dregs of fat in system also obtain
To a large amount of cleaning, primary cooler and raw gas temperature are improved；Since tar water reduces, tar sump water volume reduces section
Steam consumption is saved, pollution of the evaporation to atmosphere of naphthalene is reduced；Remained ammonia Quality advance, oil content reduce, and ammonium hydroxide becomes limpid,
Be conducive to later period AMMONIA TREATMENT；Ammonia spray nozzle no longer blocks, and reduces maintenance cost, advantageously reduces containing for tar and naphthalene in coal gas
Amount.Gas temperature is reduced, interior coal gas throughput increases in a limited space；Tar viscosity reduces, and improves mobility, improves tar
Quality (naphthalene content improves 3 points or more)；The pipeline of ammonia circulation system is obviously cleaned, and tar slag is cleared up；Ammonium hydroxide
Pump rotating vane tar is cleared up, and is lowered workload, is prolonged the service life；Ammonium hydroxide oil-containing reduces, and reduces ammonium hydroxide and ceases burnt band
The tar smell come；More improvement are brought to subsequent all links of recovery workshop and reduce security risk, reduce worker's labor
Fatigue resistance.
Those skilled in the art after considering the specification and implementing the invention disclosed here, will readily occur to of the invention its
Its embodiment.This application is intended to cover any variations, uses, or adaptations of the invention, these modifications, purposes or
Person's adaptive change follows general principle of the invention and including the undocumented common knowledge in the art of the present invention
Or conventional techniques.The description and examples are only to be considered as illustrative, and true scope and spirit of the invention are by following
Claim is pointed out.
It should be understood that the present invention is not limited to the precise structure already described above and shown in the accompanying drawings, and
And various modifications and changes may be made without departing from the scope thereof.The scope of the present invention is limited only by the attached claims.
Claims (4)
1. a kind of purification method for coal chemical industrial waste water, which is characterized in that in the recovery of circulatory system of the coal chemical industrial waste water
In be located at coal gas sink water outlet water circulating pump suction inlet at be added oleyl amine polyoxyethylene ether,
The additional amount of the oleyl amine polyoxyethylene ether accounts for 1~10ppm of quantity of circulating water in the recovery of circulatory system；
It is located at the sucking of the aqua ammonia pump or phenol water pump of coal gas sink water outlet in the recovery of circulatory system of the coal chemical industrial waste water
Oleyl amine polyoxyethylene ether is added at mouthful,
The additional amount of the oleyl amine polyoxyethylene ether accounts for 0.5~1.5ppm of quantity of circulating water in the recovery of circulatory system；
Add at the water circulating pump suction inlet of spray scrubber water inlet end in the recovery of circulatory system of the coal chemical industrial waste water
Enter oleyl amine polyoxyethylene ether,
The additional amount of the oleyl amine polyoxyethylene ether accounts for 2~5ppm of quantity of circulating water in the circulatory system.
2. being used for the purification method of coal chemical industrial waste water according to claim 1, which is characterized in that in the recovery of circulatory system
In be located at the water circulating pump suction inlet of coal gas sink water outlet and be added into the recovery of circulatory system using high-pressure metering pump
Oleyl amine polyoxyethylene ether.
3. being used for the purification method of coal chemical industrial waste water according to claim 2, which is characterized in that using gradually incremental addition
Oil is added positioned at the water circulating pump suction inlet of coal gas sink water outlet into the recovery of circulatory system of the coal chemical industrial waste water in mode
Amine polyoxyethylene ether.
4. being used for the purification method of coal chemical industrial waste water according to claim 3, which is characterized in that the addition being gradually incremented by
Mode includes:
It is added at the water circulating pump suction inlet of coal gas sink water outlet in S1, Xiang Suoshu recovery of circulatory system and accounts for the recycling
The oleyl amine polyoxyethylene ether of 1~3ppm of quantity of circulating water in the circulatory system is kept for 10~15 days；
It is added at the water circulating pump suction inlet of coal gas sink water outlet in S2, Xiang Suoshu recovery of circulatory system and accounts for the recycling
The oleyl amine polyoxyethylene ether of 3~5ppm of quantity of circulating water in the circulatory system is kept for 25~30 days；
It is added at the water circulating pump suction inlet of coal gas sink water outlet in S3, Xiang Suoshu recovery of circulatory system and accounts for the recycling
The oleyl amine polyoxyethylene ether of 5~10ppm of quantity of circulating water in the circulatory system, until quantity of circulating water described in the recovery of circulatory system
In tar content drop to original 20%~30%.
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