CN108237136A - Three-level counter-current extraction coal-tar residue device and its processing method - Google Patents
Three-level counter-current extraction coal-tar residue device and its processing method Download PDFInfo
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- CN108237136A CN108237136A CN201711486311.3A CN201711486311A CN108237136A CN 108237136 A CN108237136 A CN 108237136A CN 201711486311 A CN201711486311 A CN 201711486311A CN 108237136 A CN108237136 A CN 108237136A
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- 238000000605 extraction Methods 0.000 title claims abstract description 171
- 239000011280 coal tar Substances 0.000 title claims abstract description 68
- 238000003672 processing method Methods 0.000 title abstract description 8
- 238000002156 mixing Methods 0.000 claims abstract description 123
- 239000002904 solvent Substances 0.000 claims abstract description 60
- 239000002994 raw material Substances 0.000 claims abstract description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 23
- 239000003250 coal slurry Substances 0.000 claims abstract description 14
- 238000000926 separation method Methods 0.000 claims abstract description 14
- 239000011269 tar Substances 0.000 claims abstract description 14
- 238000011084 recovery Methods 0.000 claims abstract description 13
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 claims abstract description 12
- 239000007788 liquid Substances 0.000 claims abstract description 9
- 238000002360 preparation method Methods 0.000 claims abstract description 7
- 239000000284 extract Substances 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 5
- 239000007787 solid Substances 0.000 claims description 5
- 238000005507 spraying Methods 0.000 claims description 5
- CTQNGGLPUBDAKN-UHFFFAOYSA-N O-Xylene Chemical compound CC1=CC=CC=C1C CTQNGGLPUBDAKN-UHFFFAOYSA-N 0.000 claims description 4
- 238000000227 grinding Methods 0.000 claims description 4
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 238000009833 condensation Methods 0.000 claims description 3
- 230000005494 condensation Effects 0.000 claims description 3
- 238000003860 storage Methods 0.000 claims description 2
- 238000001816 cooling Methods 0.000 claims 1
- 230000004069 differentiation Effects 0.000 claims 1
- 239000007921 spray Substances 0.000 claims 1
- 238000012545 processing Methods 0.000 abstract description 7
- 230000007613 environmental effect Effects 0.000 abstract description 5
- 239000000047 product Substances 0.000 description 12
- 239000003245 coal Substances 0.000 description 7
- 239000002699 waste material Substances 0.000 description 7
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 238000004064 recycling Methods 0.000 description 4
- 239000002893 slag Substances 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000002817 coal dust Substances 0.000 description 2
- 238000004821 distillation Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000008096 xylene Substances 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000003034 coal gas Substances 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000005243 fluidization Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 231100000614 poison Toxicity 0.000 description 1
- 230000007096 poisonous effect Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000002910 solid waste Substances 0.000 description 1
- 238000013517 stratification Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D11/00—Solvent extraction
- B01D11/04—Solvent extraction of solutions which are liquid
- B01D11/0488—Flow sheets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B5/00—Operations not covered by a single other subclass or by a single other group in this subclass
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
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- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Extraction Or Liquid Replacement (AREA)
Abstract
The present invention relates to a kind of three-level counter-current extraction coal-tar residue device and processing method, including pre-separation unit, three-level counter-current extraction unit, solvent recovery unit, water-coal-slurry preparation unit.Pre-separation unit essential equipment (UEE) has liquid level gauge, raw material knockout drum, coal-tar residue delivery pump, three-level counter-current extraction unit essential equipment (UEE) has the efficient extraction tower of level-one self mixing type, the efficient extraction tower of two level self mixing type, the efficient extraction tower of three-level self mixing type, crude benzol pump, extractant recovery unit capital equipment has stripper, destilling tower, cooler, reboiler, and water-coal-slurry preparation unit capital equipment has ball mill, crude benzol water separation tank.Device start-stop of the present invention is flexible, and operating flexibility is big, easy to control, and equipment investment is less, is suitble to continuous operation, can stablize extensive processing, and the processing method raw material availability is high, tar recovery rate is high, environmental protection, non-secondary pollution.
Description
Technical field
The present invention relates to a kind of three-level counter-current extraction coal-tar residue device and its processing methods, belong to coal-tar residue processing skill
Art field.
Background technology
China is the world's largest coal production state, under nowadays oil, natural gas situation in short supply, implements coal resources
Cleaning, high added value conversion processing and utilization approach have important strategic importance.However coal is in the mistake for consuming and utilizing
A large amount of byproduct and waste are inevitably resulted from journey, coal-tar residue is exactly one of waste therein.Coal tar
Slag be coal gasify and coking in, the higher boiling organic compound generated under the high temperature conditions is in condensation with being pressed from both sides in coal gas
The solia particles such as coal dust, the coke powder of band etc. it is mixed in together and formed.With the fast development of coal chemical industry, production capacity is not
Disconnected to expand, the quantity of the coal-tar residue of generation also gradually increases.Environmental Protection in China general bureau expressly provides the coal tar that coke-oven plant generates
Slag belongs to dangerous solid waste, and it is a kind of harmful poisonous waste residue that should concentrate and carry out innoxious place's coal-tar residue, is dealt with improperly
Easily cause environmental pollution.
It can be divided into two classes generally for the processing method of coal-tar residue：The first kind is using physics or chemical method
Oil, slag in coal-tar residue is detached, and therefrom recycles valuable tar and coal dust, then it is carried out further
Processing recycles, and oil, slag separation and recovery technology are a kind of desirable routes for handling coal-tar residue, and this method can realize tar and coal
The recycling of powder makes its utility value reach maximization；Second class be using coal-tar residue as fuel, additive for coal blending or
Carry out utilization of recycling etc..
Coal-tar residue is industrial residue, and directly outer row can cause serious dirt to ambient enviroments such as farmland, underground water, air
Dye, so must strictly be handled it.In addition, also containing a large amount of fixed carbon and organic component, tool in coal-tar residue
There is higher calorific value, be the optimal path for solving coal tar waste residue if it can be turned harm into good, turned waste into wealth.
Invention content
Present invention aims at a kind of three-level counter-current extraction coal-tar residue device is provided, start-stop is flexible, and operating flexibility is big, easily
Control, equipment investment is less, is suitble to continuous operation, can stablize extensive processing, has higher raw material availability and tar
Recovery rate, environmental protection, non-secondary pollution.
Three-level counter-current extraction coal-tar residue device of the present invention, including pre-separation unit, three-level counter-current extraction unit,
Solvent recovery unit；
The pre-separation unit includes raw material knockout drum；
The three-level counter-current extraction unit includes the efficient extraction tower of level-one self mixing type, the efficient extraction tower of two level self mixing type, three
The grade efficient extraction tower of self mixing type, the efficient extraction tower light phase feed pipe of level-one self mixing type and the efficient extraction tower light phase area of two level self mixing type
Outlet connection, the efficient extraction tower heavy phase area outlet of level-one self mixing type are connect with the efficient extraction tower heavy phase feed pipe of two level self mixing type,
The extraction tower light phase area outlet efficient with three-level self mixing type of the efficient extraction tower light phase feed pipe of two level self mixing type connects, two level self mixing type
Efficient extraction tower heavy phase area outlet is connect with the efficient extraction tower heavy phase feed pipe of three-level self mixing type；Level-one self mixing type efficiently extracts
Tower, the efficient extraction tower of two level self mixing type, the efficient extraction tower height ratio of three-level self mixing type are 5:4:3, two adjacent self mixing types are efficient
Extraction tower is there are difference in height, and heavy phase sinks down into bottom after entering the efficient extraction tower of level-one self mixing type after extraction, and level-one is certainly
For mixing efficient extraction tower with the efficient extraction tower of two level self mixing type according to law of connected vessels, such heavy phase will flow to next stage certainly certainly
Mixing efficient extraction tower；Similary light phase out enters the efficient extraction tower of two level self mixing type from the efficient extraction tower top of three-level self mixing type
Lower part, light phase flow to the efficient extraction tower of next stage self mixing type certainly.
The solvent recovery unit includes stripper, destilling tower, cooler, solvent knockout drum, and three-level self mixing type efficiently extracts
The outlet of Qu Ta heavy phases area is connect with stripper feed inlet, and the efficient extraction tower light phase area outlet of level-one self mixing type, stripper top go out
Mouth is connect with input of column mouth, and destilling tower top exit is connect with solvent knockout drum top feed mouth, destilling tower and solvent
Detach tank connected pipeline is equipped with cooler, and the high-order solvent outlet and the efficient extraction tower of three-level self mixing type of solvent knockout drum are light
Phase feed pipe connects, and solvent knockout drum is pumped with the pipeline that the efficient extraction tower of three-level self mixing type is connect equipped with solvent delivery；
Wherein：The outlet of raw material knockout drum low level coal-tar residue is connect with the efficient extraction tower heavy phase feed pipe of level-one self mixing type,
The pipeline that knockout drum is connect with the efficient extraction tower of level-one self mixing type is equipped with coal-tar residue delivery pump.
Also set water-coal-slurry preparation unit, water-coal-slurry preparation unit includes ball mill, ball mill with raw material knockout drum low level
Water outlet, solvent knockout drum low level water outlet, the connection of stripper outlet at bottom.
Distillation tower bottom is connected with reboiler.
Raw material knockout drum is equipped with first liquid level gauge, and solvent knockout drum is equipped with second liquid level gauge.
The efficient extraction tower of level-one self mixing type, the efficient extraction tower of two level self mixing type, the efficient extraction tower of three-level self mixing type are respectively provided with
With lower structure：Light phase feed pipe first half tube wall is equipped with equally distributed material spraying hole, and heavy phase feed pipe lower half tube wall is equipped with equal
The material spraying hole of even distribution, extraction and separation area are transversely provided with several strip " people " fonts gear that multilayer is fixed on extraction inner wall of tower
Plate, coal-tar residue are sent to coal-tar residue feed pipe through coal-tar residue delivery pump and are sprayed downwards in fan cylinder, and extractant is mixed from oneself
The efficient extraction tower feed pipe input of formula is sprayed upwards in fan cylinder, and in extraction and separation area, coal-tar residue passes through downwards " people " font baffle
More tiny fluidization tower is cut into, extractant flows up the contact area increased after fixed column plate blocking back-mixing with coal-tar residue,
Substantially increase extraction efficiency.
Stratification in aqueous coal-tar residue raw material knockout drum, water layer top layer in raw material knockout drum are former collecting
Expect that lower water is sent into ball mill in the interior upper strata removing water and solvent knockout drum of knockout drum, collects the solid that stripper bottom of towe comes out
Ball mill is sent into, opens ball mill grinding water-coal-slurry product.
Enter reboiler to the coai-tar product of destilling tower bottom of towe to be back in destilling tower.
The processing method of three-level counter-current extraction coal-tar residue of the present invention, includes the following steps：
(1) the three-level extraction of coal-tar residue：Efficiently extract by level-one self mixing type successively after coal-tar residue is carried out predrainage
Tower, the efficient extraction tower of two level self mixing type, the efficient extraction tower of three-level self mixing type is taken to be extracted, the efficient extraction tower institute of level-one self mixing type
The extractant used distinguishes the solvent separated out for the efficient extraction tower light phase of two level self mixing type and extract oil, two level self mixing type efficiently extract
Extractant used in tower is taken to distinguish the solvent separated out and extract oil for the efficient extraction tower light phase of three-level self mixing type；
(2) extractant recycles：The separated heavy phase of the efficient extraction tower of three-level self mixing type enters stripper progress
Stripping enters destilling tower after the steam mixing that the light phase and stripper overhead that the efficient extraction tower of level-one self mixing type is isolated come out and steams
It evaporates, collects the coai-tar product of destilling tower bottom of towe, the steam that overhead comes out enters solvent after cooler condenses and detaches
Tank storage carries out the multi_layer extraction of water, solvent, and solvent knockout drum upper strata solvent is sent into the efficient extraction tower of three-level self mixing type as extraction
Agent is taken to be recycled.
Solvent is one kind in thick benzene,toluene,xylene.
Coal-tar residue uses raw material knockout drum predrainage, collects lower floor in the removing water of raw material knockout drum and solvent knockout drum
Water is sent into ball mill, collects the solid that stripper bottom of towe comes out and is sent into ball mill, opens ball mill grinding water-coal-slurry product.
Enter reboiler to the coai-tar product of destilling tower bottom of towe to be back in destilling tower.
Extraction temperature of the coal-tar residue in the efficient extraction tower of level-one self mixing type is 60-75 DEG C, extraction time 0.5-
1.5h；Extraction temperature of the coal-tar residue in the efficient extraction tower of two level self mixing type is 60-75 DEG C, extraction time 0.4-1.2h；
Coal-tar residue is 60-75 DEG C in the extraction temperature of the efficient extraction tower of three-level self mixing type, extraction time 0.3-0.9h；In destilling tower
Vapo(u)rizing temperature is 120-130 DEG C.
Compared with prior art, the present invention it has the advantages that.
(1) raw material availability of the present invention is high, and coal tar recovery rate is high, and up to more than 90%, it is abundant to realize coal-tar residue
Effective recycling solves the technical issues of traditional handicraft raw material availability is low, tar recovery rate is low；
(2) present invention can operate continuously, can stablize extensive processing, solve that traditional handicraft is discontinuous, can not achieve
The technical issues of scale；
(3) environmental requirement is not fully achieved in water consumption, no waste discharge to production process of the present invention；
(4) apparatus of the present invention start-stop is flexible, and operating flexibility is big, easy to control, and equipment investment is less, and economic benefit is apparent, solution
The technical issues of traditional handicraft of having determined operating flexibility is small, investment is big.
Description of the drawings
Fig. 1, structure diagram of the embodiment of the present invention；
The efficient extraction tower structure diagram of one, two, three self mixing type in Fig. 2, Fig. 1；
Heavy phase, light phase feed pipe structure schematic diagram in Fig. 3, Fig. 1.
In figure：1st, the efficient extraction tower 5 of first liquid level gauge 2, raw material knockout drum 3, coal-tar residue delivery pump 4, level-one self mixing type,
The efficient extraction tower 6 of two level self mixing type, the efficient extraction tower 7 of three-level self mixing type, stripper 8, ball mill 9, destilling tower 10, cooler
11st, reboiler 12, coai-tar product 13, solvent delivery pump 14, second liquid level gauge 15, solvent knockout drum 16, water-coal-slurry product 17,
" people " font baffle.
Specific embodiment
With reference to embodiment and Figure of description, the present invention will be further described.
As shown in Figure 1, three-level counter-current extraction coal-tar residue device, including pre-separation unit, three-level counter-current extraction unit, molten
Agent recovery unit；
The pre-separation unit includes raw material knockout drum 2；
The three-level counter-current extraction unit include the efficient extraction tower 4 of level-one self mixing type, the efficient extraction tower 5 of two level self mixing type,
The efficient extraction tower 6 of three-level self mixing type, the efficient 4 light phase feed pipe of extraction tower of level-one self mixing type and the efficient extraction tower 5 of two level self mixing type
Light phase area outlet connection, efficient 4 heavy phase area of the extraction tower outlet of level-one self mixing type are fed with efficient 5 heavy phase of extraction tower of two level self mixing type
Pipe connects, and 6 light phase area of the extraction tower outlet efficient with three-level self mixing type of the efficient 5 light phase feed pipe of extraction tower of two level self mixing type connects,
The efficient 5 heavy phase area of extraction tower of two level self mixing type exports 6 heavy phase feed pipe of extraction tower efficient with three-level self mixing type and connect；
The solvent recovery unit includes stripper 7, destilling tower 9, cooler 10, solvent knockout drum 15, three-level self mixing type
Efficient 6 heavy phase area of extraction tower outlet is connect with 7 feed inlet of stripper, efficient 4 light phase area of the extraction tower outlet of level-one self mixing type, stripping
7 top exit of tower is connect with 9 feed inlet of destilling tower, and 9 top exit of destilling tower is connect with 15 top feed mouth of solvent knockout drum,
The pipeline that destilling tower 9 is connect with solvent knockout drum 15 is equipped with cooler 10, the high-order solvent outlet and three of solvent knockout drum 15
Efficient 6 light phase feed pipe of the extraction tower connection of grade self mixing type, the pipe that the extraction tower 6 efficient with three-level self mixing type of solvent knockout drum 15 is connect
Road is equipped with solvent delivery and pumps 13；
Wherein：2 low level coal-tar residue of raw material knockout drum is exported to be connected with the efficient 4 heavy phase feed pipe of extraction tower of level-one self mixing type
It connects, the pipeline that the extraction tower 4 efficient with level-one self mixing type of knockout drum 2 is connect is equipped with coal-tar residue delivery pump 3.
Water-coal-slurry preparation unit is also set, water-coal-slurry preparation unit includes ball mill 8, and ball mill 8 is low with raw material knockout drum 2
Position water outlet, 15 low level water outlet of solvent knockout drum, the connection of 7 outlet at bottom of stripper.
9 bottom of destilling tower is connected with reboiler 11.
Raw material knockout drum 2 is equipped with first liquid level gauge 1, and solvent knockout drum 15 is equipped with second liquid level gauge 14.
As Figure 2-3, the efficient extraction tower 4 of level-one self mixing type, the efficient extraction tower 5 of two level self mixing type, three-level self mixing type are high
Effect extraction tower 6 is respectively provided with lower structure：Light phase feed pipe first half tube wall is equipped with equally distributed material spraying hole, under heavy phase feed pipe
Half portion tube wall be equipped with equally distributed material spraying hole, extraction and separation area be transversely provided with multilayer be fixed on extraction inner wall of tower on several
Strip " people " font baffle 17.
In the present embodiment, the processing method of the three-level counter-current extraction coal-tar residue includes the following steps：
(1) the three-level extraction of coal-tar residue：Efficiently extract by level-one self mixing type successively after coal-tar residue is carried out predrainage
The efficient extraction tower 5 of tower 4, two level self mixing type, the efficient extraction tower 6 of three-level self mixing type is taken to be extracted, level-one self mixing type efficiently extracts
Extractant used in tower 4 distinguishes the solvent separated out and extract oil, two level self mixing type for efficient 5 light phase of extraction tower of two level self mixing type
Extractant distinguishes the solvent separated out and extract oil for efficient 6 light phase of extraction tower of three-level self mixing type used in efficient extraction tower 5；
(2) extractant recycles：The separated heavy phase of the efficient extraction tower 6 of three-level self mixing type enter stripper 7 into
Row stripping enters distillation after the steam mixing that the light phase and 7 tower top of stripper that the efficient extraction tower 4 of level-one self mixing type is isolated come out
Tower 9 distills, and collects the coai-tar product 12 of 9 bottom of towe of destilling tower, the steam that 9 tower top of destilling tower comes out is after the condensation of cooler 10
The multi_layer extraction for carrying out water, solvent is stored into solvent knockout drum 15,15 upper strata solvent of solvent knockout drum is sent into three-level self mixing type
Efficient extraction tower 6 is recycled as extractant.
Solvent is one kind in thick benzene,toluene,xylene.
Coal-tar residue uses 2 predrainage of raw material knockout drum, in the removing water and solvent knockout drum 15 for collecting raw material knockout drum 2
Lower water is sent into ball mill 8, collects the solid that 7 bottom of towe of stripper comes out and is sent into ball mill 8, opens 8 grinding water of ball mill
Coal slurry product 16.
The coai-tar product 12 of 9 bottom of towe of destilling tower is back into reboiler 11 in destilling tower 9.
Extraction temperature of the coal-tar residue in the efficient extraction tower 4 of level-one self mixing type is 60-75 DEG C, extraction time 0.5-
1.5h；Extraction temperature of the coal-tar residue in the efficient extraction tower 5 of two level self mixing type is 60-75 DEG C, extraction time 0.4-1.2h；
Coal-tar residue is 60-75 DEG C in the extraction temperature of the efficient extraction tower 6 of three-level self mixing type, extraction time 0.3-0.9h；Destilling tower 9
Interior vapo(u)rizing temperature is 120-130 DEG C.
In the present embodiment, the solid portion that 7 bottom of towe of stripper comes out is mainly the carbon dust (content of organics containing a small amount of ash content
Less than standard as defined in EPA), with solvent knockout drum 15, a small amount of water mixing that raw material knockout drum 2 generates is as production water-coal-slurry
The raw material of product 16.Entire production process does not have waste discharge, and coal-tar residue has been carried out sufficiently effective recycling,
National requirements for environmental protection is fully achieved, economic benefit is apparent；After testing, the movement of coai-tar product 12 that 9 bottom of towe of destilling tower comes out is viscous
Spend (50 DEG C) ＜ 55m2/ s, moisture (mass fraction) ＜ 3, carbon residue ＜ 18m/m, gross calorific value ＞ 9000 block/kilogram, coal tar can be done
The raw material of oily deep processing improves its added value.
Claims (10)
1. a kind of three-level counter-current extraction coal-tar residue device, it is characterised in that：Including pre-separation unit, three-level counter-current extraction list
Member, solvent recovery unit；
The pre-separation unit includes raw material knockout drum (2)；
The three-level counter-current extraction unit include the efficient extraction tower of level-one self mixing type (4), the efficient extraction tower of two level self mixing type (5),
The efficient extraction tower of three-level self mixing type (6), the efficient extraction tower of level-one self mixing type (4) light phase feed pipe are efficiently extracted with two level self mixing type
Tower (5) light phase area outlet connection, the outlet of the efficient extraction tower of level-one self mixing type (4) heavy phase area and the efficient extraction tower of two level self mixing type
(5) heavy phase feed pipe connects, the efficient extraction tower of two level self mixing type (5) light phase feed pipe and the efficient extraction tower of three-level self mixing type (6)
Light phase area outlet connection, the outlet of the efficient extraction tower of two level self mixing type (5) heavy phase area and the efficient extraction tower of three-level self mixing type (6) heavy phase
Feed pipe connects；
The solvent recovery unit includes stripper (7), destilling tower (9), cooler (10), solvent knockout drum (15), and three-level is certainly
Mixing efficient extraction tower (6) heavy phase area outlet is connect with stripper (7) feed inlet, the efficient extraction tower of level-one self mixing type (4) light phase
Area outlet, stripper (7) top exit are connect with destilling tower (9) feed inlet, destilling tower (9) top exit and solvent knockout drum
(15) top feed mouth connects, and the pipeline that destilling tower (9) is connect with solvent knockout drum (15) is equipped with cooler (10), solvent point
High-order solvent outlet from tank (15) is connect with the efficient extraction tower of three-level self mixing type (6) light phase feed pipe, solvent knockout drum (15)
The pipeline being connect with the efficient extraction tower of three-level self mixing type (6) is equipped with solvent delivery and pumps (13)；
Wherein：Raw material knockout drum (2) low level coal-tar residue is exported to be connected with the efficient extraction tower of level-one self mixing type (4) heavy phase feed pipe
It connects, the pipeline that knockout drum (2) is connect with the efficient extraction tower of level-one self mixing type (4) is equipped with coal-tar residue delivery pump (3).
2. three-level counter-current extraction coal-tar residue device according to claim 1, it is characterised in that：It also sets water-coal-slurry and prepares list
Member, water-coal-slurry preparation unit include ball mill (8), and ball mill (8) is detached with raw material knockout drum (2) low level water outlet, solvent
Tank (15) low level water outlet, the connection of stripper (7) outlet at bottom.
3. three-level counter-current extraction coal-tar residue device according to claim 1, it is characterised in that：Destilling tower (9) bottom connects
There is reboiler (11).
4. three-level counter-current extraction coal-tar residue device according to claim 1, it is characterised in that：Raw material knockout drum (2) is set
There is first liquid level gauge (1), solvent knockout drum (15) is equipped with second liquid level gauge (14).
5. according to any three-level counter-current extraction coal-tar residue devices of claim 1-4, it is characterised in that：Level-one self mixing type
Efficient extraction tower (4), the efficient extraction tower of two level self mixing type (5), the efficient extraction tower of three-level self mixing type (6) are respectively provided with lower structure：
Light phase feed pipe first half tube wall is equipped with equally distributed material spraying hole, and heavy phase feed pipe lower half tube wall is equipped with equally distributed spray
Expect hole, extraction and separation area is transversely provided with several strip " people " font baffles (17) that multilayer is fixed on extraction inner wall of tower.
A kind of 6. method of three-level counter-current extraction coal-tar residue, it is characterised in that：Include the following steps：
(1) the three-level extraction of coal-tar residue：Pass through the efficient extraction tower of level-one self mixing type successively after coal-tar residue is carried out predrainage
(4), the efficient extraction tower of two level self mixing type (5), the efficient extraction tower of three-level self mixing type (6) are extracted, and level-one self mixing type efficiently extracts
Extractant used in tower (4) is taken to distinguish the solvent separated out and extract oil, two level for the efficient extraction tower of two level self mixing type (5) light phase
The solvent that extractant used in the efficient extraction tower of self mixing type (5) is separated out for the differentiation of the efficient extraction tower of three-level self mixing type (6) light phase
And extract oil；
(2) extractant recycles：The separated heavy phase of the efficient extraction tower of three-level self mixing type (6) enter stripper (7) into
Row stripping enters after the steam mixing that the light phase and stripper (7) tower top that the efficient extraction tower of level-one self mixing type (4) is isolated come out
Destilling tower (9) distills, and collects the coai-tar product (12) of destilling tower (9) bottom of towe, the steam that destilling tower (9) tower top comes out is through cooling
Enter the multi_layer extraction that solvent knockout drum (15) storage carries out water, solvent after device (10) condensation, solvent knockout drum (15) upper strata is molten
Agent is sent into the efficient extraction tower of three-level self mixing type (6) and is recycled as extractant.
7. the method for three-level counter-current extraction coal-tar residue according to claim 6, it is characterised in that：Solvent is crude benzol, first
One kind in benzene, dimethylbenzene.
8. the method for three-level counter-current extraction coal-tar residue according to claim 6, it is characterised in that：Coal-tar residue is using former
Expect knockout drum (2) predrainage, the removing water and the interior lower water of solvent knockout drum (15) for collecting raw material knockout drum (2) are sent into ball mill
(8), it collects the solid that stripper (7) bottom of towe comes out and is sent into ball mill (8), open ball mill (8) grinding water-coal-slurry product
(16)。
9. the method for three-level counter-current extraction coal-tar residue according to claim 6, it is characterised in that：To destilling tower (9) tower
The coai-tar product (12) at bottom is back into reboiler (11) in destilling tower (9).
10. the method for three-level counter-current extraction coal-tar residue according to claim 6, it is characterised in that：Coal-tar residue is one
Extraction temperature in the grade efficient extraction tower of self mixing type (4) is 60-75 DEG C, extraction time 0.5-1.5h；Coal-tar residue is in two level
Extraction temperature in the efficient extraction tower of self mixing type (5) is 60-75 DEG C, extraction time 0.4-1.2h；Coal-tar residue three-level from
The extraction temperature of mixing efficient extraction tower (6) is 60-75 DEG C, extraction time 0.3-0.9h；Destilling tower (9) interior vapo(u)rizing temperature is
120-130℃。
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Denomination of invention: Three stage countercurrent extraction coal tar residue device and its treatment method Granted publication date: 20230815 Pledgee: Postal Savings Bank of China Limited Jinan Branch Pledgor: SHANDONG HENGLI NEW ENERGY ENGINEERING Co.,Ltd. Registration number: Y2024980001294 |