CN105779021B - Coal tar separation method in a kind of recycling of coking tedge gas energy and coal gas - Google Patents
Coal tar separation method in a kind of recycling of coking tedge gas energy and coal gas Download PDFInfo
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- CN105779021B CN105779021B CN201610135341.9A CN201610135341A CN105779021B CN 105779021 B CN105779021 B CN 105779021B CN 201610135341 A CN201610135341 A CN 201610135341A CN 105779021 B CN105779021 B CN 105779021B
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
- C10K1/00—Purifying combustible gases containing carbon monoxide
- C10K1/02—Dust removal
- C10K1/024—Dust removal by filtration
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B47/00—Destructive distillation of solid carbonaceous materials with indirect heating, e.g. by external combustion
- C10B47/28—Other processes
- C10B47/30—Other processes in rotary ovens or retorts
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B49/00—Destructive distillation of solid carbonaceous materials by direct heating with heat-carrying agents including the partial combustion of the solid material to be treated
- C10B49/02—Destructive distillation of solid carbonaceous materials by direct heating with heat-carrying agents including the partial combustion of the solid material to be treated with hot gases or vapours, e.g. hot gases obtained by partial combustion of the charge
- C10B49/04—Destructive distillation of solid carbonaceous materials by direct heating with heat-carrying agents including the partial combustion of the solid material to be treated with hot gases or vapours, e.g. hot gases obtained by partial combustion of the charge while moving the solid material to be treated
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B53/00—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form
- C10B53/08—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form in the form of briquettes, lumps and the like
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B57/00—Other carbonising or coking processes; Features of destructive distillation processes in general
- C10B57/16—Features of high-temperature carbonising processes
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10C—WORKING-UP PITCH, ASPHALT, BITUMEN, TAR; PYROLIGNEOUS ACID
- C10C1/00—Working-up tar
- C10C1/04—Working-up tar by distillation
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10C—WORKING-UP PITCH, ASPHALT, BITUMEN, TAR; PYROLIGNEOUS ACID
- C10C1/00—Working-up tar
- C10C1/04—Working-up tar by distillation
- C10C1/08—Winning of aromatic fractions
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
- C10K1/00—Purifying combustible gases containing carbon monoxide
- C10K1/002—Removal of contaminants
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
- C10K1/00—Purifying combustible gases containing carbon monoxide
- C10K1/02—Dust removal
- C10K1/026—Dust removal by centrifugal forces
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
- C10K1/00—Purifying combustible gases containing carbon monoxide
- C10K1/04—Purifying combustible gases containing carbon monoxide by cooling to condense non-gaseous materials
- C10K1/046—Reducing the tar content
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
- C10K1/00—Purifying combustible gases containing carbon monoxide
- C10K1/08—Purifying combustible gases containing carbon monoxide by washing with liquids; Reviving the used wash liquors
- C10K1/16—Purifying combustible gases containing carbon monoxide by washing with liquids; Reviving the used wash liquors with non-aqueous liquids
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- 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
Abstract
The invention discloses a kind of heats using coking tedge coal gas, and the coal tar in coke-stove gas is separated and processed, and utilizes the method for the heat regeneration residual coking ammonia water of coal gas cooling link and the benzene-enriched washing oil for washing benzene.It is characterized in that utilizing the energy warms part low-order coal of tedge coal gas, coke-stove gas and pyrolysis coal gas after cooling pass through heat exchange in special fractionating column, coal tar desuperheat is realized and is separated, the coal tar of classification recycling different component, the heat waste ammonia liquor and de- benzene richness washing oil in fractionating column are utilized simultaneously, reach ammonia still process and the regenerated purpose of de- benzene, to realize the heat using tedge coal gas, realizes the separation and ammonia still process, the reduction of de- benzene regeneration energy of coal tar.
Description
Technical field
Coal tar separation method in a kind of coking tedge gas energy recycling of the present invention and coal gas is related to a kind of using burnt
The heat of furnace tedge coal gas recycles coke-stove gas high temperature coal tar, and realizes the recycling side of classification and the upgrading of coal tar
Method.Belong to coking of coal and chemical technology field, in particular to a kind of heat for making full use of coking tedge coal gas is to coke-oven coal
Coal tar in gas is separated and is processed, and using the heat regeneration residual coking ammonia water of coal gas cooling link and washes benzene
Benzene-enriched washing oil method.
Background technique
Coal tar is a kind of black or dark brown viscous liquid obtained in coking of coal process, and specific gravity is greater than water, has
Certain dissolubility and special stink, flammable and be corrosive, coal tar is the production in the raw gas that coking industry pyrolysis of coal generates
One of object is a kind of complexity with higher-energy when coal tar oil and gas and other byproducts are overflowed from tedge together
Mixture.
Traditional coking coal tar recovery technology is that the raw coke oven gas for generating coal in retort process is pooled to charing ceiling
Portion space enters gas collecting tube, the circulation ammonia that 750 DEG C of raw coke oven gas is intratracheally sprayed by bridge tube sum aggregate through bridge tube into tedge
It is water-cooled to 84 DEG C or so.Tar etc. is condensed simultaneously in raw coke oven gas.Coal gas and the tar condensed out with ammonium hydroxide together,
It is sent to gas-liquid separator through gas piping, the liquid phase tar that comes out from gas-liquid separator, that ammonium hydroxide enters mechanization tar ammonia is clear
Clear slot, to obtain aqueous containing solid coal tar；
Process, which can be seen that existing gas purification and tar separation technology, from the process above following deficiency:
1.750 DEG C of raw coke oven gas contains a large amount of sensible heats, and the sensible heat of raw coke oven gas accounts for about the 35% of coke oven energy consumption, this portion of energy
It is equivalent to the 4% of coking coal energy.Cool down using by spray cycle ammonium hydroxide, a large amount of heat is by unrestrained in vain in raw coke oven gas
Take；
2. there are also a large amount of dust in raw coke oven gas, by way of spray ammonium hydroxide washing, although reducing dust in raw coke oven gas
Content, but dust and tar are finally mixing in the duct, cause finished product coal tar dust content high, so that coal tar knot
Burnt temperature rises.The difficulty for increasing following process of moisture and solid impurity；
3. tar, ammonium hydroxide enter mechanization tar ammonia defecator, it is obtained after separation be aqueous, saliferous, it is miscellaneous containing solid
The coal tar of matter, when carrying out following process, processing is carried out to moisture and salinity causes power consumption of polymer processing to rise.
Summary of the invention
To solve the above-mentioned problems, a kind of coking tedge gas energy of the present invention recycles and the coal tar side of separation in coal gas
Method provides a kind of heat using coke oven coke oven uprising tube coal gas, recycles coke-stove gas high temperature coal tar, and realize coal tar
The recovery method of classification and upgrading.
Coal tar separation method is achieved in that in a kind of coking tedge gas energy recycling of the present invention and coal gas
1) 750 DEG C of coal gas of high temperature is sent to tedge gas collecting tube through tedge, is introduced directly into coal gas prefiltration from gas collecting tube
Cyclone separator；
2) rotary motion caused by being introduced tangentially by cyclone separator air-flow makes the solid with larger centrifugal inertial force
Coke granule falls, the coke powder that collection part coke-stove gas is taken out of；
3) high temperature rotating is introduced by the coal gas of preliminary treatment and carbonizes recuperative furnace；Coal gas of high temperature passes through direct or indirect side
Formula is contacted in rotary furnace with low-order coal, is carbonized as coal absorbs heat, the coke-stove gas of high temperature is also cooling by 750 DEG C or so
To 550 DEG C；
The high temperature rotating charing recuperative furnace is mainly used for molding low-order coal carrying out pyrocarbon in sealed stove
Change process for producing process, that is, enter the solid low-order coal of internal heat type retort, by certain condition in internal heat type retort
Heat treatment and a series of destructive distillation, pyrolysis, polycondensation reaction etc., are made coal base briquetting carbonized material, and feed coal leads in carbonization process
It crosses and high temperature coke oven coal gas exchanges heat, absorb a large amount of heat, and reduce the temperature of coke-stove gas；Simultaneously the volatile matter in coal every
Faint gasification and decomposition volatilization are obtained in the environment of exhausted air, are overflowed with coke-stove gas；
4) the pyrolysis coal gas of the coke-stove gas for the cooling that high temperature rotating charing recuperative furnace comes out and generation, into high temperature filtration
Device carries out purifying and dedusting；
The high-temperature filter is made of the TiAl intermetallic compound porous material of acid and alkali-resistance, high temperature, vibration, passes through height
The coke-stove gas of warm metal sintered filter, final dust-filtering precision≤5mg/m3；
5) Atmospheric vacuum fractionating column further, is entered by the high temperature mixed gas of purifying and dedusting；
The Atmospheric vacuum fractionating column is a combination tower, takes three side lines；Three side lines produce light oil, carbolic oil respectively
And washing oil, tower bottom extract heavy oil out, the boiling range of the light oil is 105 DEG C ~ 170 DEG C, and the boiling range of carbolic oil is 170 DEG C ~ 230 DEG C, washing oil
Boiling range be 230 DEG C ~ 320 DEG C, heavy oil recycling be more than 320 DEG C of fluid oil；
6) further, the benzene-enriched washing oil of Xi Ben workshop section is passed straight back in tower by the recovery tower lower return section, gently
Hydrocarbon is vaporized into light oil constituents, and washing oil is regenerated, and regenerated washing oil is directly imported into the Components of Wash Oil in tower.
In the present invention, for Atmospheric vacuum rectifying column, the side's of entering heat is greater than square heat, and a large amount of after-heats remove fraction
It is most of to need to take away by reflux outside for radiation loss, to maintain full tower heat balance；
The full tower delayed heat=side's of entering heat-goes out square heat
Reflux takes heat=full tower delayed heat-tower body radiation loss
In the present invention, in order to take heat using reflux, in Atmospheric vacuum rectifying column other than overhead reflux, 2 middle sections is set and are followed
Loopback stream, from recovery tower upper return section extension liquid phase hot oil, through with sulphur ammonium remained ammonia heat exchange, to reduce former steaming
The steam consumption of ammonia link；
7) tar is precipitated takes heat than come the temperature that controls each boiling range by adjusting mid-pumparound.Coke-stove gas is by drop
Wen Hou, different component realizes that segmentation is precipitated in coal tar, and different component coal tar is collected in stripper by bypass.
In the present invention, specifically takes thermal potential to set and chosen according to the raw material ammonia water for washing ammonia and the benzene-enriched washing oil required temperature for washing benzene；
8) for mixed gas after tar component is recycled in classification, the low temperature coal gas to tower top is cooled to 25 DEG C by air cooler,
The purified gas of incoagulability introduces subsequent processing after exporting gas-liquid separator separating liquid state water.
The Atmospheric vacuum fractionating column outlet setting air cooling tower, by gas cooling to 25 DEG C or so, a large amount of water exists in coal gas
This condenses and passes through outlet gas-liquid separator separates.
Gas-liquid separator outlet connection coking plant Roots blower, the condensation of water flowing steam and incoagulable gas
Extraction, guarantees that tower top pressure maintains several kPas of negative pressure.
In the present invention, moisture contained in coal gas is precipitated in tar Atmospheric vacuum fractionating column upper-part centralized, and the moisture of precipitation is rich
It containing phenolic substances, is handled by collecting this effluent part point, the phenolic compound of high value can be recovered to, refine smart phenol.
In the present invention, using steam subsidiary in coke-stove gas, improves mobility status oily in tower, avoids hot-spot,
The oil gas partial pressure in tower is also reduced simultaneously, improves the rate of recovery of heavy constituent oil product.
Beneficial effect.
One, the coke powder in coke oven coke oven uprising tube coal gas, char particle are separated by prefiltration cyclone separator, can recoverer
Divide coke powder, char particle, and the dust in coke-stove gas can be made to obtain preliminary purification.
Two, coke-stove gas high-temperature part directly exchanges heat producing steam because temperature and pressure is higher, to equipment and materials and technique
It is proposed very high requirement, the prior art implements cost of investment and operation stability is all poor, low by being changed to
The rotary furnace heat exchange mode of pressure recycles this portion of energy, can improve Business Economic Benefit.
Three, the coke powder in coke-stove gas and ashes pass through the filtering of intermetallic compound porous material, so that the coal of recycling
Dust content greatly reduces in tar, and efficiency of dust collection reaches 99.9%, reaches 5mg/Nm3, very to subsequent coal tar deep processing
Favorably.
Four, the heat of coking tedge coal gas is made full use of to separate and process the coal tar in coke-stove gas, and
Residual coking ammonia water is regenerated using the heat of coal gas cooling link and washes the benzene-enriched washing oil of benzene.
Detailed description of the invention
Attached drawing 1 is the technique stream of coal tar separation method in a kind of coking tedge gas energy recycling of the present invention and coal gas
Cheng Tu
Specific embodiment:
1 pair of technical solution of the present invention further illustrates with reference to the accompanying drawing:
By taking certain independent coke-oven plant's tedge coal gas as an example, attribute is as follows:
The coal gas being discharged from tedge, dust content is up to 10-40g/m3, if do not handled these coal dusts, fortune
Pipeline can be blocked in row, be also easy together with adsorbing powder dust when coal tar is precipitated, in addition coal tar carbon element content is up to 85%
More than, it is easy to cause tar to be carbonized.So before being recycled to coal tar, it is necessary to clear up dust.
By taking certain 1,600,000 tons of independent coke-oven plant coking plant as an example, tolerance is probably in 90000m3 or so per hour, because of gas
Amount is big, and dust content is also relatively high, it is necessary to pre-process to coal gas, otherwise essence filtering operation pressure rises fast, it is necessary to pass through
Blowback is often carried out, running quality is caused to decline, operating cost rises.
In the present invention, just processing, 50 μm of rank dust of removal about 96%, 73% are carried out to coal gas using cyclone separator
5 μm of rank dust and 27% 1 μm of rank dust.High temperature rotating, which is introduced, by the coal gas of preliminary treatment carbonizes recuperative furnace.
The high temperature rotating charing recuperative furnace is mainly used for molding low-order coal carrying out pyrocarbon in sealed stove
Change process for producing process, that is, enter the solid low-order coal of internal heat type retort, by certain condition in internal heat type retort
Heat treatment and a series of destructive distillation, pyrolysis, polycondensation reaction etc., are made coal base briquetting carbonized material.Feed coal leads in carbonization process
It crosses and high temperature coke oven coal gas exchanges heat, absorb a large amount of heat, and reduce the temperature of coke-stove gas, the coke-stove gas of cooling and generation
Pyrolysis coal gas, high temperature coal gas purification process is discharged by burner escape pipe.
In the present invention, there is a large amount of flammable explosive pyrolysis coal gas to generate in carbonization process, this requires the lifes in equipment
It must not leak at gas, while outside air not can enter in equipment barrel, thus it is high to the seal request of equipment.
It should be noted that traditional high temperature coal gas purification is typically chosen the high temperature pottery of the refractory ceramics element composition of import
Porcelain filtration system handles coal gas of high temperature, but ceramic filter element is at high price, and intensity is not high to be easily damaged.It is main
Be that ceramic filter element is generally required and worked under the pressure of 1.6Mpa, can not be returned in coke oven production system gas riser waste heat
It receives and is run under the operating condition of 10Kpa or so.
In the present invention, the high temperature filtration systematic comparison of selection, intermetallic compound filter material composition is suitble to this technique
Service condition can fully meet technique requirement, and the high temperature filtration system of intermetallic compound filter material composition can be through
By 800 DEG C or more of high temperature, and corrosion resistance, vibration strength and filtration pressure difference can be operated normally under lower operating pressure and can expire
The needs of sufficient coke oven production system gas riser waste heat recycling, finally can reach≤5mg/m3 to the filtering accuracy of dust, dust catching is most
Small particle reaches 0.1 μm.
Coal tar is the very complicated mixture with very wide boiling range, the property of various components, such as boiling point, average molecular matter
Amount all has very big difference, and the molecule latent heat of vaporization is also very big.By measuring and calculating, tower top and column bottom temperature difference reach 450 DEG C.
Further, tar Atmospheric vacuum fractionating column, the Atmospheric vacuum fractionation are entered by the mixed gas that dust essence filters
Tower is a combination tower, takes three side line processes that the light oil, washing oil and carbolic oil of different boiling ranges is separately recovered.
In the present invention, in Atmospheric vacuum fractionating column other than overhead reflux, then 2 mid-pumparounds are set, from Atmospheric vacuum
Fractionating column top extension liquid phase hot oil, through in Atmospheric vacuum fractionating column other than overhead reflux, then 2 middle sections being arranged and follow
Loopback stream ammonia still process and washes the richness of benzene through exchanging heat with residual coking ammonia water from Atmospheric vacuum fractionating column top extension liquid phase hot oil
The heat exchange regeneration of benzene washing oil, takes rich heat away.It specifically takes thermal potential to set basis to wash the raw material ammonia water of ammonia and wash the benzene-enriched washing oil institute of benzene
Temperature is needed to choose, tar is precipitated takes heat than come the temperature that controls each boiling range by adjusting mid-pumparound.Coke-stove gas passes through
After cooling, complicated component is slowly precipitated in different location in coal tar, is collected by column plate.
By equilibrium analysis, the Atmospheric vacuum fractionating column concern is primarily with material, heat and the stream-liquid phase balance in tower,
The material balance of Atmospheric vacuum fractionating column facilitates the normal quiet run for maintaining Atmospheric vacuum fractionating column and upstream coking and downstream cold
Bulging production is coordinated.
Heat balance be mainly take away the heat of mixed gas to heat residual coking ammonia water, regeneration washes the benzene-enriched of benzene and washes
Oil takes hot ratio by adjusting middle section reflux, the tar in coal gas is precipitated in design position, convenient for recycling.Stream-liquid phase balance master
Reflux ratio is reasonably adjusted, isolated each component tar is made to reach the quality requirement of subsequent purification.
In the present invention, by taking 1,600,000 tons of independent coke-oven plant coking plant as an example, the coal tar oil quality of recycling can achieve YB/
T5079-93 requirement, wherein ash content, moisture content index be because technological improvement is significantly better than original process, and by this complexity of coal tar
Mixture be separated into the light oil of 105 DEG C ~ 170 DEG C boiling ranges, 170 DEG C ~ 230 DEG C of carbolic oil and is more than at 230 DEG C ~ 320 DEG C of washing oil
320 DEG C of liquid heavy oil.And recover energy in year 767507Gj, converts into 26187 tons of coal of mark.
In the present invention, by heat exchange remained ammonia and regeneration benzene-enriched washing oil, reduce coking crude benzene workshop section tube furnace
The consumption of heating gas, reduces SO2 and DS NOx Est.Ammonia still process is eliminated, reduces a large amount of ammonia still process steam per hour, is dropped
It is low to bring the steam vapour amount of remained ammonia into, so that the waste water yield of coking plant is reduced, it is general after starting for coking dry coke quenching
A solution route is opened all over the sewage handling problem faced.
Claims (3)
1. coal tar separation method in a kind of coking tedge gas energy recycling and coal gas, which is characterized in that including following step
It is rapid:
1) 750 DEG C of coal gas of high temperature is sent to tedge gas collecting tube through tedge, is introduced directly into coal gas prefiltration whirlwind from gas collecting tube
Separator；
2) rotary motion caused by being introduced tangentially by cyclone separator air-flow makes the solid coke with larger centrifugal inertial force
Particles fall, the coke powder that collection part coke-stove gas is taken out of；
3) high temperature rotating is introduced by the coal gas of preliminary treatment and carbonizes recuperative furnace；Coal gas of high temperature by direct or indirect mode,
It is contacted, is carbonized as coal absorbs heat, the coke-stove gas of high temperature is also cooled to 550 DEG C by 750 DEG C with low-order coal in rotary furnace；
4) the pyrolysis coal gas of the coke-stove gas for the cooling that high temperature rotating charing recuperative furnace comes out and generation, into high-temperature filter
Carry out purifying and dedusting；
5) Atmospheric vacuum fractionating column further, is entered by the high temperature mixed gas of purifying and dedusting；
6) further, the benzene-enriched washing oil of Xi Ben workshop section is passed straight back in tower by the Atmospheric vacuum fractionating column lower return section,
Lighter hydrocarbons are vaporized into light oil constituents, and washing oil is regenerated, and regenerated washing oil is directly imported into the Components of Wash Oil in tower；
7) tar is precipitated takes heat than come the temperature that controls each boiling range by adjusting mid-pumparound；
Coke-stove gas is after cooling, and different component realizes that segmentation is precipitated in coal tar, and different component coal tar is existed by bypass
It is collected in stripper；
8) for mixed gas after tar component is recycled in classification, the low temperature coal gas to tower top is cooled to 25 DEG C by air cooler, does not coagulate
The purified gas of property introduces subsequent processing after exporting gas-liquid separator separating liquid state water.
2. coal tar separation method in a kind of coking tedge gas energy recycling according to claim 1 and coal gas,
It is characterized in that the Atmospheric vacuum fractionating column is a combination tower, takes three side lines；Three side lines produce light oil, carbolic oil respectively
And washing oil, tower bottom extract heavy oil out, the boiling range of the light oil is 105 DEG C ~ 170 DEG C, and the boiling range of carbolic oil is 170 DEG C ~ 230 DEG C, washing oil
Boiling range be 230 DEG C ~ 320 DEG C, heavy oil recycling be more than 320 DEG C of fluid oil.
3. coal tar separation method in a kind of coking tedge gas energy recycling according to claim 1 or 2 and coal gas,
It is characterized in that Atmospheric vacuum fractionating column outlet setting air cooling tower, by gas cooling to 25 DEG C, a large amount of water condenses herein in coal gas
And pass through outlet gas-liquid separator separates.
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| CN103509608A (en) * | 2012-06-19 | 2014-01-15 | 北京华泰焦化工程技术有限公司 | Raw gas cooling and fractionation method and coking apparatus |
| CN104388128A (en) * | 2014-11-26 | 2015-03-04 | 陕西煤业化工技术研究院有限责任公司 | System and method for dedusting of pyrolysis raw gas and tar recycling employing oil-cooling |
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|---|---|---|---|---|
| JPH02191697A (en) * | 1989-01-20 | 1990-07-27 | Mitsubishi Kasei Corp | Purification of coke oven gas |
| CN103509608A (en) * | 2012-06-19 | 2014-01-15 | 北京华泰焦化工程技术有限公司 | Raw gas cooling and fractionation method and coking apparatus |
| CN103275767A (en) * | 2013-05-24 | 2013-09-04 | 张晓� | Method for separating high-temperature gas containing solid dust and tar gas |
| CN104388128A (en) * | 2014-11-26 | 2015-03-04 | 陕西煤业化工技术研究院有限责任公司 | System and method for dedusting of pyrolysis raw gas and tar recycling employing oil-cooling |
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