CN206666453U - A kind of coal tar pretreatment system - Google Patents
A kind of coal tar pretreatment system Download PDFInfo
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- CN206666453U CN206666453U CN201720352039.9U CN201720352039U CN206666453U CN 206666453 U CN206666453 U CN 206666453U CN 201720352039 U CN201720352039 U CN 201720352039U CN 206666453 U CN206666453 U CN 206666453U
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Abstract
The utility model discloses a kind of coal tar pretreatment system, including：Flash tank；Filter, it is connected with flash tank；One-level blender, is connected with filter, mixes and reacts for the coal tar after making water, one-level metal remover and one-level demulsifier and filtering；One-level water controller, one-level metal remover and demulsifier adder, are connected with one-level blender；One-level oil water separator, connected with one-level blender, for carrying out water-oil separating to the mixture in one-level blender；Secondary mixer, connected with one-level oil water separator, for making water, two level demulsifier and two level metal remover mix and react with one-level coal tar；Two level water controller, two level metal remover and demulsifier adder, are connected with secondary mixer.The utility model can effectively reduce the impurity content in coal tar, and the energy consumption in preprocessing process is low, and the coal tar oil-proofness obtained after processing is strong, it is possible to prevente effectively from corrosion of the coal tar in subsequent processes to equipment pipe.
Description
Technical field
Coal tar pretreating process design field is the utility model is related to, espespecially a kind of coal tar pretreatment system.
Background technology
It is lasting vigorous to the demand of clean fuel with the fast development of China's economic and the integral pressure of environment, due to
The Chinese more coals of oil starvation, good chance is provided to the by-product coal tar production liquid fuel in coal chemical industry.Generally use at present
Hydrofinishing and the technique that is hydrocracked carry out desulfurization, denitrogenation, demetalization and cracking to coal tar, generation naphtha, diesel oil and
The different types of light oil such as gasoline.
Coal tar is coal coking, destructive distillation and the accessory substance of gasification, contains more moisture, salt, metal and quinoline non-soluble
Thing (hereinafter referred to as QI), these impurity can produce serious influence to hydrogenation plant, catalyst and product quality.In coal tar
Moisture typically constitutes from 2~5%wt, and moisture can cause system energy consumption to increase, and SR increase, reduces production capacity.Salt is main
It is ammonium chloride, when equipment is heated to 220~250 DEG C, ammonium chloride can resolve into ammonia and hydrogen chloride, and hydrogen chloride can cause equipment
Heavy corrosion.Tenor in coal tar is 0.01~0.05%wt, mainly the metal such as calcium, magnesium, iron, sodium, wherein about 10
~20%wt metal is present in the emulsified water of coal tar with water soluble metallic compound, and about 30%wt metal is with solid
Grain form is present in the QI of part, and remaining metal is with naphthenate, phenates, porphyrin and more complicated gum asphalt salt
Be dissolved in coal tar, these metals can be generated in hydrogenation process metal sulfide deposition on a catalyst, make catalyst blockage,
Inactivation, poisoning, bed pressure drop rise.In addition, metallic salt can also cause the fouling of heating furnace and heat transmission equipment, energy consumption is caused to increase
Add, shorten the cycle of operation.QI contents are about 0.1~1.5 wt% in coal tar, including coke powder, coal dust, mechanical admixture and semicoke
The condensed-nuclei aromatics polymer of change, and equipment and pipeline corrosion thing, it can equally cause catalyst blockage, inactivation, poisoning, pressure drop rise.
Therefore, coal tar is before hydrogenation, it is necessary to which it is pre-processed.
At present, the difficult point in coal tar preprocessing process is：
1st, emulsification is serious, and demulsification is difficult.For water in coal tar in the presence of inorganic salts and ammonia, hydrone is dispersed in coal tar
The emulsion of Water-In-Oil is formd in oil.Also contain substantial amounts of QI particles in coal tar, these QI granular absorptions are in oil-water interfaces
On, the oil-water interfacial film being made up of multilayered particles can be formed, adds oil-water interfaces film strength so that coal tar emulsifying liquid
It is highly stable.The method of traditional centrifugation, natural subsidence and electro-desalting can not effectively destroy emulsion system, dewatering and desalting
Removal efficiency is low, and energy consumption is big.
2nd, QI granule contents are high, and particle diameter is small, and removing is difficult.About 35%wt QI grain diameters are less than 25 μm, wherein big portion
Point be the condensed-nuclei aromatics polymer for belonging to carbonization at low temperature, QI particle of this part less than 25 μm be either attached on emulsion or
It is attached in gum asphalt, it is highly stable in coal tar, can not be by settling and centrifuge effective removing, therefore QI
Removal efficiency is low.
3rd, oil soluble metal stability is strong, and removing is difficult.Coal tar oil-soluble metal is with naphthenate, phenates, porphyrin
Salt, non-porphyrin and gum asphalt form are present.Wherein with metallic compound stability constant existing for naphthenate, phenates
Relatively low, the method by adding complex is easier to remove, and gold in the form of porphyrin, non-porphyrin and gum asphalt be present
Category compound stability constant is higher, and chemical feeding quantity is big, and removing is difficult.
It is CN201316557Y in patent publication No., subject name is that skid-mounted type alternating current-direct current compound field coal tar desalination takes off
In water installations, using water, metal and the impurity in the method removing coal tar of electro-desalting, but not to oil soluble metal and QI
Handled.
In patent publication No. CN105505453A, subject name is a kind of coal tar without in the demetallated method of water desalination,
Using anhydrous plus agent stirring reaction, coal tar desalination demetalization is then carried out by the method for solid-liquor separation.This method is used and stirred
It is big to mix energy consumption of reaction, treating capacity is small, and the salt in coal tar exists in the form of emulsified water, can not pass through demetalization reaction and liquid
Gu separation removal.
Patent publication No. is CN105623698A, and subject name is that a kind of method of coal tar pretreatment discloses a kind of use
The method and device of metal, coal tar and metal remover are anti-in fiber-film contact in fiber-film contact removing coal tar
Should, salt, oil soluble metal are removed, then profit standing separation obtains pretreated coal tar, and this method contains to solid impurity
Measure that high coal tar effect is poor, and fiber-film contact is easily blocked by solid particulate matter.
The above method has certain effect for removing coal tar W/O, salt, metal and QI, but for coal tar
QI contents and pH value there are certain requirements, the too high normal operations that can influence electro-desalting of QI, cause electro-desalting power consumption to rise even electricity
The problems such as fouling and blocking of field breakdown, electric desalting equipment electrode fouling, water-oil separating difficulty, and equipment pipe, pH value mistake
Height can reduce demetalization efficiency, metal remover loss increase.
Therefore, the applicant is directed to providing a kind of new coal tar pretreatment system.
Utility model content
The purpose of this utility model is to provide a kind of coal tar pretreatment system, can effectively reduce the impurity in coal tar
Content, and the energy consumption in preprocessing process is low, the coal tar oil-proofness obtained after processing is strong.
In order to solve the above technical problems, the utility model provides a kind of coal tar pretreatment system, including：Flash tank,
For being flashed to coal tar；Filter, it is connected with the flash tank, for being filtered to the coal tar after flash distillation；One
Level blender, is connected with the filter, for mixing the coal tar after water, one-level metal remover and one-level demulsifier and filtering
Merge reaction；One-level water controller, one-level metal remover and demulsifier adder, connected respectively with the one-level blender；One-level
Oil water separator, connect with the one-level blender, obtained for carrying out water-oil separating to the mixture in the one-level blender
To one-level coal tar；Secondary mixer, connected with the one-level oil water separator, for taking off water, two level demulsifier and two level
Metal agent is mixed and reacted with the one-level coal tar；Two level water controller, two level metal remover and demulsifier adder, respectively with
The secondary mixer connection.
Preferably, the filter includes filter element, and the filter element is metal powder sintered filter element, accuracy class
0.2~2 μm.
Preferably, the coal tar pretreatment system also includes：Residue liquid recover, is connected with the filter respectively,
Refiltered for reclaiming the residue in the filter and the coal tar being filtrated to get being delivered in filter.
Preferably, the coal tar pretreatment system also includes：Primary heater, it is connected with the flash tank, for inciting somebody to action
Coal tar before flash distillation is heated to 120~130 DEG C.
Preferably, the coal tar pretreatment system also includes：Secondary heater, it is connected with the filter, for inciting somebody to action
Coal tar before filtering is heated to 120~150 DEG C.
Coal tar pretreatment system of the present utility model can realize any one following beneficial effect.
1st, coal tar pretreatment system of the present utility model coal tar is flashed successively, filtered, coagulation and two
Level processing, deamination processing is carried out to coal tar by flash distillation, refilter the coal tar after flash distillation and remove QI therein, make coal tar
Emulsion unstability is demulsified, consequently facilitating handling the demetalization in later stage, is easy to water-oil separating simple, greatly reduces energy consumption,
Stability is improved, coal tar still contains substantial amounts of oil soluble metal, after two stage treatment, coal tar after coagulation
In organic metal salt be dissolved in water, then removed by water-oil separating, in the coal tar obtained after two stage treatment QI reduce
To below 0.002wt%, water is taken off to below 0.5wt%, and salt is taken off to below 5ppm, and metal is taken off to below 20ppm, raw materials recovery rate
More than 97%, it is achieved thereby that preferable pretreating effect, and energy consumption is small.
2nd, coal tar pretreatment system of the present utility model is used as filter element to coal tar by metal powder sintered filter element
Oil is filtered, and periodic cleaning filter element and handles the residue after filtering, and the filtering accuracy of filter element is high, extends it
Service life, it ensure that higher coal tar recovering utilization rate.
3rd, coal tar pretreatment system of the present utility model can orient the oil soluble metal in removing coal tar, reduce
The loss of metal remover, the removal efficiency of metal are high.
Brief description of the drawings
The utility model is described in further detail with reference to the accompanying drawings and detailed description：
Fig. 1 is a kind of structural representation of specific embodiment of coal tar pretreatment system of the present utility model；
Drawing reference numeral explanation：
Flash tank 10, filter 20, one-level blender 31, one-level water controller 32, one-level metal remover and demulsifier addition
Device 33, one-level oil water separator 35, secondary mixer 41, two level water controller 42, two level metal remover and demulsifier adder
43rd, two level oil water separator 45, residue liquid recover 50.
Embodiment
, below will be to embodiment in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art
Or the required accompanying drawing used is briefly described in description of the prior art, it should be apparent that, drawings in the following description are only
It is some embodiments of the utility model, for those of ordinary skill in the art, is not paying the premise of creative work
Under, other accompanying drawings can also be obtained according to these accompanying drawings.
Embodiment one
Present embodiment discloses a kind of coal tar preprocess method, including step：
S10：Coal tar be heated to flashing again after 120~130 DEG C；After step S10 processing, coal tar
Volatility ammonium salt in oil is removed, and the pH value of coal tar substantially reduces, and this is advantageous to the further demulsification of coal tar, while
Contribute to it is demetallated be smoothed out, this is due to that the PH of coal tar is lower, oil soluble metal be easier to dissociate metal from
Son, metal remover easier can then participate in demetalization reaction, and metal removal effect is better；
S20：Coal tar after flash distillation is carried out to be heated to 120~150 DEG C, then passes through automatic backwash micro-filtration filter
Filtered, automatic backwash micro-filtration filter is using metal powder sintered filter element as filter element, the μ of accuracy class 0.2~2
M, the rate of filtration are 0.2~1.0m3/m2/hr；After being isolated by filtration, the QI in coal tar is intercepted at filter element surface,
Coal tar enters subsequent handling through filter element, under the oil water interfacial tension that coal tar emulsifying liquid is made by removing QI particles
Drop, the stability of emulsion drastically reduce, while emulsion is squeezed deformation during the duct through filter element and lost
Surely, the demetallated even running of follow-up dewatering and desalting is contributed to；
S30：Water, one-level demulsifier and one-level metal remover are mixed with the coal tar being filtrated to get and make its reaction, and
The temperature of coal tar of the reaction temperature herein with being obtained after filtering is identical, and reacted mixture then is put into water-oil separating
0.2~1hr is stood in device and carries out water-oil separating, obtains one-level coal tar, oil water separator here can be settling tank or
Electrical desalter；
S40：One-level coal tar is mixed and reacted with water, two level demulsifier and two level metal remover, also, and herein
Coal tar of the reaction temperature with being obtained after filtering temperature it is identical, reacted mixture is then put into oil water separator
0.2~1hr of interior standing carries out water-oil separating, obtains two level coal tar；
S50：By the filter element in cleaning agent periodic cyclic cleaning S20, cleaning cleaning frequency is 1~7 day/
Secondary, each scavenging period is 1~12hr, and cleaning agent is selected from diesel oil, gasoline, dimethylbenzene and two level coal tar hydrogenating generation oil；
S60：The cleaning agent for having cleaned filter element is recycled, cleaning agent is selected from diesel oil, gasoline, dimethylbenzene, two level coal
Hydrogenation of tar generation oil.
Specifically, in step s 30, the addition of water is 5~8wt%, the addition of one-level demulsifier for 10~
200ppm, the addition of the one-level metal remover is agent calcium mol ratio 2:1, that is to say, that the addition of one-level metal remover
Ratio with the mole of the calcium in raw coal tar is 2:1.In step s 30, one-level metal remover include one-level complex and
One-level consisting of phase-transferring agent, one-level complex are selected from disodium ethylene diamine tetraacetate (EDTA-2Na), sodium gluconate, sodium metasilicate, three
Polyphosphate sodium, sodium pyrophosphate, calgon, ammonium sulfate, ammonium phosphate, consisting of phase-transferring agent are selected from polyalcohols, quaternary ammonium salt.
After step S30 processing, volatility ammonium salt, solid ammonium-salt, water-soluble metal salt in coal tar and with cycloalkanes
Metal transfer is into water existing for hydrochlorate, phenates form, then water-oil separating.Coal tar after step S30 processing still contains
There is substantial amounts of oil soluble metal, this part oil soluble metal is mainly in the form of porphyrin, non-porphyrin and gum asphalt
In the presence of, be not easy in the basic conditions removing, it is necessary to continue to handle.
Specifically, in step s 40, the addition of water is 5~8wt%, the addition of two level demulsifier for 10~
50ppm, the addition of two level metal remover is agent iron mol ratio 2:1, that is to say, that the addition and raw coal of two level metal remover
The ratio of the mole of iron in tar is 2:1.Two level metal remover includes two level complex, organic acid and two level phase transfer
Agent, two level complex are selected from aminotriacetic acid (NTA), 1-hydroxy ethylidene-1,1-diphosphonic acid (HEDP), ethylenediamine tetramethylene phosphonic acid
(EDTMPA), disodium ethylene diamine tetraacetate (EDTA-2Na), diethylenetriamine pentaacetic acid (DTPA), the sodium of iminodisuccinic acid four,
The organic acid is selected from formic acid, acetic acid, oxalic acid, butyric acid, maleic acid, polyacrylic acid, citric acid, and two level consisting of phase-transferring agent is selected from polyalcohols
Class, quaternary ammonium salt.Wherein, the effect of organic acid is to reduce the pH value of coal tar, promotes oil soluble metal salt more to ionize out
Metal ion, promote demetallated reaction rate.
Step S60 is specially：The gum asphalt of filter element surface is washed down to obtain cleaning fluid, recovered filtering element
The performance of part, in the present embodiment, the cleaning fluid that automatic backwash micro-filtration filter periodically discharges a filter volume are extremely returned
Receive in device, QI granule contents are 5~10%wt in cleaning fluid, and coal tar content is 90~95%wt, the coal tar in recovered liquid
Component is collected and is returned to automatic backwash micro-filtration filter feed pipe, and QI particles are concentrated, and in the form of solid slag
Discharge, these solid slags can be as the fuel of coal-burning installation.
By in the present embodiment preprocess method processing after coal tar in QI take off to below 0.002wt%, water take off to
Less than 0.5%, salt is taken off to below 5ppm, and metal is taken off to below 20ppm, and raw material yield is more than 97%, and is needed in processing procedure
Energy consumption it is small.
Embodiment two
Embodiment two discloses another embodiment of coal tar preprocess method, method and embodiment in the present embodiment
One is essentially identical, and difference is, in the present embodiment, step S70 is also included between step S10 and step S20：To sudden strain of a muscle
Flux oil is added in coal tar after steaming to reduce the density of the coal tar after flash distillation.Wherein, flux oil is selected from diesel oil or coal tar
Oily hydrogenated oil.Coal tar oil density after dilution is less than 1.0g/cm3, preferably smaller than 0.96g/cm3。
Method in the present embodiment is applied to the situation that coal tar oil density is larger after flashing, close by diluting reduction coal tar
Degree, can be effectively ensured subsequent filter effect and oil-water separation.
Certainly, in the other embodiment of coal tar preprocess method of the present utility model, step S10, in S20, S30
Heating-up temperature can be adjusted according to being actually needed；Filter can also be selected from the filter of other forms；One-level is broken
Emulsion, one-level metal remover and two level demulsifier, the specific composition of two level metal remover can be selected according to being actually needed
Select；Water-oil separating step in step S30 and S40 can also be carried out by electro-desalting or other modes.
Embodiment three
The invention also discloses a kind of coal tar pretreatment system, including：Flash tank 10, for being carried out to coal tar
Flash distillation；Filter 20, it is connected with flash tank 10, for being filtered to the coal tar after flash distillation；One-level blender 31, with filtering
Device 20 connects, and mixes and reacts for the coal tar after making water, one-level metal remover and one-level demulsifier and filtering；One-level adds
Hydrophone 32, one-level metal remover and demulsifier adder 33, are connected with one-level blender 31 respectively, and one-level water controller 32 is to one-level
Add water in blender 31, one-level metal remover and demulsifier adder 33 add one-level metal remover into one-level blender 31
With the mixture of one-level demulsifier；One-level oil water separator 35, connected with one-level blender 31, in one-level blender 31
Mixture carry out water-oil separating obtain one-level coal tar；Secondary mixer 41, connected with one-level oil water separator 35, for making
Water, two level demulsifier and two level metal remover are mixed and reacted with one-level coal tar；Two level water controller 42, two level metal remover and
Demulsifier adder 43, connected respectively with secondary mixer 41, two level water controller 42 adds water, two level into secondary mixer 41
Metal remover and demulsifier adder 43 add the mixing of two level metal remover and two level demulsifier into secondary mixer 41
Thing.
Specifically, filter 20 is automatic backwash micro-filtration filter, automatic backwash micro-filtration filter includes metal powder
Last sintered filter core filter element, its accuracy class are 0.2~2 μm.
Specifically, coal tar pretreatment system also includes residue liquid recover 50, residue liquid recover 50 respectively with filtering
Device 20 connects, for the residue in recovery filter 20 and by the coal tar being filtrated to get be delivered in filter 20 carry out after
Filter, the filter residue being filtrated to get can then regard fuel.
Specifically, coal tar pretreatment system also includes primary heater, secondary heater, primary heater and flash tank
10 connections, for the coal tar before flash distillation to be heated into 120~130 DEG C；Secondary heater is connected with filter 20, for inciting somebody to action
Coal tar before filter is heated to 120~150 DEG C.
Certainly, in the other embodiment of coal tar pretreatment system of the present utility model, filter can also use it
The filter of his form, filtering accuracy grade are adjusted according to being actually needed；Slag liquid recover, primary heater, second add
Hot device can carry out selective setting according to being actually needed.
Three concrete application situations of the preprocess method of coal tar of the present utility model are as follows：
1st, coal tar (originating from Cao Feidian) is heated to 130 DEG C, flash evaporation deamination, then by coal tar and diesel oil in mass ratio 1:
1 is prepared into miscella, is heated to 150 DEG C and enters filter, Filter Precision is 0.5 μm, rate of filtration 0.8m3/m2/ h, filtering
Miscella afterwards carries out coagulation：Miscella injects 8wt% water (coming from the water after two stage treatment), 20ppm demulsifiers
(BP2040), 200ppm metal removers (sodium gluconate, sodium pyrophosphate, polyethylene glycol 400), 130 DEG C are heated to, are sent into mixing
In device, then standing sedimentation 30min carries out water-oil separating and obtains one-level coal tar in settling tank, then to one-level coal tar
Carry out two stage treatment：8wt% fresh water, 20ppm demulsifiers (BP2040), the de- gold of 1500ppm are injected in one-level coal tar
Belong to agent (EDTA-2Na, HEDP, citric acid, polyethylene glycol 400), and the reaction temperature of mixture is 130 DEG C, will be reacted mixed
Compound carries out the coal tar being purified after water-oil separating.Metal, salt, the content of water are shown in Table 1 in coal tar after purification.
Table 1
| Project | Raw material | Coal tar after pretreatment |
| Fe, ppm | 80 | 5.6 |
| Ca, ppm | 23 | 1.1 |
| Mg, ppm | 7.1 | 1.2 |
| Na, ppm | 40 | 0.2 |
| Si, ppm | 6.9 | 0.3 |
| Salt, ppm | 24.13 | 3.43 |
| Water, wt% | 3.2 | 0.3 |
| QI, wt% | 0.173 | 0.002 |
2nd, coal tar (originate from Inner Mongol celebrating China) is heated to 130 DEG C, flash evaporation deamination, then by coal tar and diesel oil in mass ratio
1:0.3 is prepared into miscella, is heated to 120 DEG C and enters filter, Filter Precision is 0.3 μm, rate of filtration 0.75m3/m2/ h,
Coagulation is carried out to the miscella after filtering：8wt% water (coming from the water after two stage treatment) is injected into miscella,
20ppm demulsifiers (BP2040), 1500ppm metal removers (calgon, Macrogol 600), mixed solution is heated to
120 DEG C and it is sent into blender, then the standing sedimentation 20min in settling tank, obtains one-level coal tar, to one after water-oil separating
Level coal tar carries out two stage treatment：The injection 8wt% fresh water into one-level coal tar, 20ppm demulsifiers (GT940),
800ppm metal removers (EDTA-2Na, maleic acid, Macrogol 600), and the reaction temperature of mixture is 120 DEG C, will be reacted
Mixture afterwards carries out the coal tar being purified after water-oil separating.Metal, salt, the content of water are shown in coal tar after processing
Shown in table 2.
Table 2
| Project | Raw material | Coal tar after pretreatment |
| Fe, ppm | 24 | 4.2 |
| Ca, ppm | 110 | 2.3 |
| Mg, ppm | 2.0 | 0.7 |
| Na, ppm | 5.0 | 0.4 |
| Si, ppm | 3.2 | 0.2 |
| Salt, ppm | 14.57 | 4.2 |
| Water, wt% | 2.5 | 0.4 |
| QI, wt% | 0.054 | 0.002 |
3rd, coal tar (originating from Hami) is heated to 130 DEG C, flash evaporation deamination, then by coal tar and diesel oil in mass ratio
1:0.2 is prepared into miscella, is heated to 120 DEG C and enters filter, Filter Precision is 0.5 μm, rate of filtration 1.0m3/m2/ h,
Coagulation is carried out to the miscella after filtering：Miscella injects 8wt% water (coming from the water after two stage treatment), 50ppm
Demulsifier (BP2040), 1800ppm metal removers (sodium gluconate, calgon, Macrogol 600) obtain mixture,
Heat the mixture in 120 DEG C of feeding blenders and reacted, it is heavy then to stand reacted mixture in settling tank
Drop 30min carries out water-oil separating and obtains one-level coal tar, then the one-level coal tar to obtaining carries out two stage treatment：To one-level coal tar
8wt% fresh water, 50ppm demulsifiers (GT940), 1200ppm metal removers (DTPA, polyacrylic acid, poly- second are injected in oil
Glycol 600), and the reaction temperature of mixture is 120 DEG C, the coal that reacted mixture be purified after water-oil separating
Tar.Coal tar metal, salt, water content after processing are shown in Table 3.
Table 3
4th, coal tar (originating from Cao Feidian) is heated to 130 DEG C, flash evaporation deamination, is heated to 120 DEG C and enters filter, filter
Precision is 0.5 μm, rate of filtration 1.0m3/m2/ h, coagulation is carried out to the coal tar after filtering：Miscella injection 8wt%'s
Water (comes from the water after two stage treatment), 50ppm demulsifiers (BP2040), 100ppm metal removers (sodium gluconate, poly- second
Glycol 600) mixture is obtained, heat the mixture in 120 DEG C of feeding blenders and reacted, then will be reacted mixed
Compound standing sedimentation 15min in settling tank carries out water-oil separating and obtains one-level coal tar, then the one-level coal tar to obtaining enters
Row two stage treatment：8wt% fresh water, 50ppm demulsifiers (GT940), 200ppm metal removers are injected into one-level coal tar
(sodium of iminodisuccinic acid four, citric acid, Macrogol 600), and the reaction temperature of mixture is 120 DEG C, will be reacted
Mixture carries out the coal tar being purified after water-oil separating.Coal tar metal, salt, water content after processing are shown in Table 3.
Table 3
| Project | Raw material | Coal tar after pretreatment |
| Fe, ppm | 27 | 1.1 |
| Ca, ppm | 2.2 | 0.2 |
| Mg, ppm | 0.37 | 0.1 |
| Na, ppm | 1.47 | 0.21 |
| Salt, ppm | 2.3 | 0.23 |
| Water, wt% | 2.1 | 0.4 |
| QI, wt% | 0.04 | 0.002 |
In summary, in the coal tar after coal tar pretreatment system of the present utility model processing QI, water take off to,
Salt, the content of metal significantly decline, and raw materials recovery rate can reach more than 97%, and energy consumption is small, realize preferably pre-
Treatment effect, the corrosion for pipe-line equipment can be effectively avoided in the subsequent treatment of coal tar.
Described above is only preferred embodiment of the present utility model, it is noted that for the common skill of the art
For art personnel, on the premise of the utility model principle is not departed from, some improvements and modifications can also be made, these improve and
Retouching also should be regarded as the scope of protection of the utility model.
Claims (5)
- A kind of 1. coal tar pretreatment system, it is characterised in that including：Flash tank, for being flashed to coal tar；Filter, it is connected with the flash tank, for being filtered to the coal tar after flash distillation；One-level blender, it is connected with the filter, for the coal after making water, one-level metal remover and one-level demulsifier and filtering Tar is mixed and reacted；One-level water controller, one-level metal remover and demulsifier adder, connected respectively with the one-level blender；One-level oil water separator, connected with the one-level blender, for carrying out oil to the mixture in the one-level blender The isolated one-level coal tar of water；Secondary mixer, connected with the one-level oil water separator, for making water, two level demulsifier and two level metal remover and institute One-level coal tar is stated to mix and react；Two level water controller, two level metal remover and demulsifier adder, are connected with the secondary mixer respectively.
- 2. coal tar pretreatment system as claimed in claim 1, it is characterised in that：The filter includes filter element, and the filter element is metal powder sintered filter element, 0.2~2 μm of accuracy class.
- 3. coal tar pretreatment system as claimed in claim 1, it is characterised in that also include：Residue liquid recover, is connected with the filter respectively, for reclaiming the residue in the filter and will be filtrated to get Coal tar be delivered in filter and refiltered.
- 4. coal tar pretreatment system as claimed in claim 1, it is characterised in that also include：Primary heater, it is connected with the flash tank, for the coal tar before flash distillation to be heated into 120~130 DEG C.
- 5. coal tar pretreatment system as claimed in claim 1, it is characterised in that also include：Secondary heater, it is connected with the filter, for the coal tar before filtering to be heated into 120~150 DEG C.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106929082A (en) * | 2017-04-06 | 2017-07-07 | 上海蓝科石化环保科技股份有限公司 | A kind of coal tar preprocess method and system |
| CN113249137A (en) * | 2021-04-15 | 2021-08-13 | 甘肃宏汇能源化工有限公司 | Process for prolonging service life of catalyst in coal tar hydrogenation technology |
-
2017
- 2017-04-06 CN CN201720352039.9U patent/CN206666453U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106929082A (en) * | 2017-04-06 | 2017-07-07 | 上海蓝科石化环保科技股份有限公司 | A kind of coal tar preprocess method and system |
| CN113249137A (en) * | 2021-04-15 | 2021-08-13 | 甘肃宏汇能源化工有限公司 | Process for prolonging service life of catalyst in coal tar hydrogenation technology |
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