CN108102726A - The method of coke-stove gas adsorption tower regeneration recycling aromatic hydrocarbons - Google Patents
The method of coke-stove gas adsorption tower regeneration recycling aromatic hydrocarbons Download PDFInfo
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- CN108102726A CN108102726A CN201710590540.3A CN201710590540A CN108102726A CN 108102726 A CN108102726 A CN 108102726A CN 201710590540 A CN201710590540 A CN 201710590540A CN 108102726 A CN108102726 A CN 108102726A
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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
- C10K1/002—Removal of contaminants
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
-
- 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
- C10K1/003—Removal of contaminants of acid contaminants, e.g. acid gas removal
- C10K1/004—Sulfur containing contaminants, e.g. hydrogen sulfide
-
- 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
- C10K1/32—Purifying combustible gases containing carbon monoxide with selectively adsorptive solids, e.g. active carbon
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/10—Inorganic adsorbents
- B01D2253/106—Silica or silicates
- B01D2253/108—Zeolites
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/10—Inorganic adsorbents
- B01D2253/116—Molecular sieves other than zeolites
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/30—Sulfur compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
- B01D2257/702—Hydrocarbons
- B01D2257/7027—Aromatic hydrocarbons
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/40—Further details for adsorption processes and devices
- B01D2259/40083—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption
- B01D2259/40088—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption by heating
- B01D2259/4009—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption by heating using hot gas
Abstract
The present invention relates to a kind of methods for coke-stove gas adsorption tower regeneration recycling aromatic hydrocarbons, it is unclean mainly to solve sulfide in coke oven gas purification in the prior art, tar, benzene and naphthalene removing, aromatic hydrocarbons is not easily recycled, and compressor cooling pipe is caused easily to block, the technical issues of Combustion engine tail gas sulfur dioxide (SO2) emissions are exceeded.The present invention is by using comprising the following steps：It regenerates the gas containing aromatic hydrocarbons come and is sent to cooler；III remainder coal gas of logistics uses workshop section into follow-up；The gas that cooler comes out, after tail gas adsorption tower, emptying；The liquid that cooler comes out into rectifying column, after separating moisture, recycles the technical solution of aromatic hydrocarbons, preferably solves the problems, such as this, in the industrial production available for coke-stove gas power generation.
Description
Technical field
The present invention relates to a kind of methods of the coke-stove gas adsorption tower regeneration recycling aromatic hydrocarbons for fuel engine power generation, particularly use
In the method for the coke-stove gas adsorption tower regeneration recycling aromatic hydrocarbons of fuel engine power generation.
Background technology
Coke-stove gas be mainly coke-oven plant's by-product containing hydro carbons, methane, hydrogen high thermal energy fuel gas, generally as
Fuel gas generation uses.Since the thermal efficiency of fuel engine power generation is higher than steam turbine, combustion is selected in the coke-stove gas power generation of general coke-oven plant
Machine generates electricity.But fuel engine power generation is higher to the purity requirement of coal gas, to remove benzene,toluene,xylene, naphthalene, coke in coke-stove gas
The organic matters such as oil prevent from blocking combustion engine nozzle, also to remove the sulfide in coke-stove gas, prevent the flue gas titanium dioxide after burning
Sulphur emissions are exceeded, and nitride is exceeded in order to prevent, it is also necessary to remove the ammonia in coke-stove gas.So before gas-fired power generation,
It is purified, removes aromatic hydrocarbons, tar, sulfide, ammonia carried in coal gas etc..
Existing fine purification technique for coke oven gas first removes the hydrogen sulfide in coke-stove gas, Ran Houyong with iron oxide adsorbent
Activated carbon removes naphthalene therein, removes benzene therein with activated carbon again, is then fed into fuel engine power generation, but deviate from hydrogen sulfide, benzene,
The effect of naphthalene is bad.
Document CN201410651179.7 discloses a kind of method of coke oven gas purification, and process is：Coke-stove gas passes through
Primary cooler is cooled to 300~500 DEG C with water indirectly, and dehydrating tower, which is dehydrated to 5~10ppm of water content, enters tar recovery tower, condensation
It is precipitated outside tar liquid and arranges, be cooled to outside -30~-50 DEG C of precipitation liquid ammonias and arrange into liquefied ammonia recovery tower, by Methanol Wash Column
Imurity-removal, clean coke-stove gas is into clean coal gas tank.The device of coke oven gas purification includes primary cooler, dehydrating tower, tar recycling
Tower, liquefied ammonia recovery tower and Methanol Wash Column are simultaneously sequentially connected.Tar recovery tower and liquefied ammonia recovery tower respectively with liquid carbon dioxide
Pipeline connects, and the bottom of towe outlet of tar recovery tower is connected with tar reclaimer, and bottom of towe outlet and the liquefied ammonia of liquefied ammonia recovery tower return
Receiving unit connects.The invention is by cooling down, being dehydrated, separating tar and ammonia, then through methanol washing process, removes the impurity in coal gas
And harmful substance, without reference to using adsorbent purifying coke oven gas.
Document CN201210012179.3 is related to a kind of gas turbine power generation coke-stove gas comprehensive purification system and its purification
Method, gas turbine power generation coke-stove gas comprehensive purification system, the coke-stove gas in gas pipe is successively through desulphurization system, compressor
Filtration system and gas filtering system enter in gas turbine, and desulphurization system is that four groups of dry desulfurizing towers are connected in parallel on gas pipe, pressure
Contracting machine filtration system is to be connected on by four compressor filters from the first appendix that desulphurization system comes out；It is comprehensive using coal gas
The purification method of cleaning system is closed, is included the following steps：A, by coal gas desulfurization；B, by the coal gas filtered compressed obtained by step a；c、
By the isobaric heating of coal gas obtained by step b；D, by coal gas pre-filtering obtained by step c；E, by coal gas essence filtering obtained by step d, obtain
Meet the coal gas of combustion engine requirement.Present system newly sets four groups of dry desulfurizing towers, with the present invention on the basis of crude benzol purified treatment
One is tower while desulfurization takes off benzene difference.
Document CN201110250178.8 reports a kind of Multifunctional raw gas purifying agent and its methods for making and using same.It should
Multifunctional raw gas purifying agent using activated alumina as carrier, load ammonium molybdate, while load copper acetate, zinc acetate, lead acetate,
1~2 kind in nickel oxalate, ammonium metavanadate, while the one kind being also loaded in magnesium chloride, potassium carbonate, sodium carbonate is made, this is multi-functional
The former composition of raw material gas purifying agent is in terms of carrier quality, and the ammonium molybdate of load is the 1%~10% of carrier quality, other 2~3 kinds
Metallic compound total amount is the 10%~25% of carrier quality.The preparation method of the Multifunctional raw gas purifying agent is first to use metal
When compound solution impregnated carrier 2~6 is small, by 120 DEG C it is dry 2~4 it is small when, when 280~350 DEG C of roastings 4~6 are small after system
Obtain the multifunctional purifying agent.The Multifunctional raw gas purifying agent is for water-gas, semiwater gas, coke-stove gas or IGCC power generation combustions
COS, CS are purified in gas unstripped gas2、HCN、SO2、SO3And O2Wait impurity, wherein COS, CS2、HCN、SO2、SO3Conversion ratio >=
90%, O2Removal efficiency >=95%.The document does not have been reported that cleanser has suction-operated to aromatic hydrocarbons.
The prior art using the report of molecular sieve adsorbent purification coal gas, is not more disclosed and adsorbed using molecular sieve
Agent, while the report of sulfide and aromatic hydrocarbons is removed, gas purifying method of the present invention removes sulfide and aromatic hydrocarbons, is directed to completely
Property solves that presently, there are the sordid technical problems of gas purification.
The content of the invention
The technical problems to be solved by the invention are mainly solved in the prior art in coke oven gas purification in the prior art
Sulfide, tar, benzene and naphthalene removing be not clean, compressor cooling pipe is caused easily to block, dioxy in the Combustion engine tail gas after power generation
Change the technical issues of sulphur emissions are exceeded, the present invention provides a kind of new coke oven gas purification method.This method is used for using coke oven
In the production of coal gas power generation, the advantages of gas purification is clean, and sulphur emissions are low, and power generator is stable.
In order to solve the above technical problems, the technical solution adopted by the present invention is as follows：A kind of coke-stove gas adsorption tower regenerates back
The method for receiving aromatic hydrocarbons, comprises the following steps：
A. the coke-stove gas that coke oven comes out slightly forms logistics I into slightly de- benzene unit after de- benzene；
B. logistics I enters thick desulfurization unit, and logistics II is formed after thick desulfurization；
C. logistics II forms logistics III into comprehensive adsorption tower A；
E. after comprehensive adsorption tower A adsorption saturations, logistics II switches into comprehensive adsorption tower B, formation by comprehensive adsorption tower A
Stream III；
F. the part coal gas in logistics III enters heat exchanger, enters after heat exchange in comprehensive adsorption tower A, absorption in comprehensive adsorption tower A
Agent starts to regenerate, and temperature regenerates the gas containing aromatic hydrocarbons come and be sent to cooler when 100 ~ 250 DEG C of hot blows 5 ~ 100 are small；
G. after the completion of hot blow, regeneration coal gas is directly entered comprehensive adsorption tower A, progress cold blowing cooling is cold without heat exchanger
Less than 100 DEG C are blown to, completes regenerative process, comprehensive adsorption tower A is spare；
H. III remainder coal gas of logistics uses workshop section into follow-up；
I. the gas that cooler comes out, after tail gas adsorption tower, emptying；
J. the liquid that cooler comes out into rectifying column, after separating moisture, recycles aromatic hydrocarbons.
Containing molecular sieve adsorbent in the synthesis adsorption tower A and comprehensive adsorption tower B, while remove in coal gas
Aromatic hydrocarbons and sulfide.
In above-mentioned technical proposal, preferred technical solution is the logistics I into before comprehensive adsorption tower, into water
Gas separating device removes the moisture in coke-stove gas.
In above-mentioned technical proposal, preferred technical solution enters tail gas desulfurization and denitration unit for the logistics IV, takes off
After sulfur dioxide and nitride, emptying.
The logistics II is middle into moisture separator before comprehensive adsorption tower is entered, and removes the water in coke-stove gas
Point；Logistics IV enters tail gas desulfurization and denitration unit, after scrubbing CO_2 and nitride, emptying.
In above-mentioned technical proposal, after preferred technical solution enters heat exchanger heat exchange for coal gas, temperature reaches 100 ~ 250
DEG C, when synthesis adsorption tower A regeneration 5 ~ 100 is small, complete regenerative process.
In above-mentioned technical proposal, preferred technical solution enters for water vapour before heat exchanger, is heated by heater.
In above-mentioned technical proposal, preferred technical solution is after the completion of comprehensive adsorption tower A regenerates, and the coal gas in logistics III is cold
Less than 80 DEG C are blown to, comprehensive adsorption tower A comes into operation.
In above-mentioned technical proposal, preferred technical solution is that the molecular sieve adsorbent is the absorption of hydrophobic type molecular sieve
Agent.
In above-mentioned technical proposal, preferred technical solution is containing in the periodic table of elements in the molecular sieve adsorbent
At least one of Ith A, II A, V A, I B, II B, III B, IV B, V B, VI B, VII B or the VIIIth race's element element.
In above-mentioned technical proposal, preferred technical solution is that the IIth element A is selected from magnesium and calcium in the periodic table of elements
At least one of；Ith B races element is selected from least one of copper, silver；IIIth B races element in lanthanum, cerium, yttrium at least
It is a kind of.
In above-mentioned technical proposal, preferred technical solution is the molecule in comprehensive adsorption tower A and comprehensive adsorption tower B
It sieves molecular sieve in class adsorbent and is selected from X-type molecular sieve, Y type molecular sieve, A type molecular sieve, ZSM types molecular sieve, modenite, β types
Molecular sieve, SAPO types molecular sieve, MCM-22, MCM-49, MCM-56, ZSM-5/ modenite, ZSM-5/ β zeolites, ZSM-5/Y,
MCM-22/ modenites, ZSM-5/Magadiite, ZSM-5/ β zeolites/modenite, ZSM-5/ β zeolites/Y zeolites or ZSM-
At least one of 5/Y zeolites/modenite.
In above-mentioned technical proposal, preferred technical solution is that ZSM type molecular sieves include in the molecular sieve adsorbent
At least one of ZSM-5, ZSM-23, ZSM-11, ZSM-48.
In above-mentioned technical proposal, preferred technical solution is more than 100 for the silica alumina ratio of the molecular sieve.
In above-mentioned technical proposal, preferred technical solution removes the coke in coal gas for the molecular sieve adsorbent simultaneously
Oil, cyanide, ammonia.
In above-mentioned technical proposal, preferred technical solution is that the aromatic hydrocarbons is benzene,toluene,xylene, ethylbenzene, front three
At least one of benzene, naphthalene, anthracene, Kun；Sulfide is hydrogen sulfide, sulfur dioxide, mercaptan, thioether, thiophene, methyl mercaptan, methyl
At least one of thioether.
In above-mentioned technical proposal, preferred technical solution is that the molecular sieve adsorbent is regenerable sorbent.
In above-mentioned technical proposal, preferred technical solution be the molecular sieve adsorbent adsorption saturation after, at 100 DEG C
More than when regeneration 3 is small in above nitrogen or coal gas, after the completion of regeneration, reuse.
In above-mentioned technical proposal, after preferred technical solution is the molecular sieve adsorbent adsorption saturation, 150 ~
When regeneration 10 ~ 30 is small in 220 DEG C of coal gas, after the completion of regeneration, reuse.
In above-mentioned technical proposal, preferred technical solution uses adsorbent of molecular sieve for slightly de- benzene unit；Thick desulfurization unit
Using containing in the Ith A, II A, V A, I B, II B, III B, IV B, V B, VI B, VII B or the VIIIth race's element in the periodic table of elements extremely
A kind of molecular sieve adsorbent of few element.
In above-mentioned technical proposal, preferred technical solution is slightly de- benzene unit using solvent-extracted method, thick desulfurization list
Member uses limestone desulfurizer.
In above-mentioned technical proposal, preferred technical solution uses adsorbent of molecular sieve for slightly de- benzene unit；Thick desulfurization unit
Using containing in the Ith A, II A, V A, I B, II B, III B, IV B, V B, VI B, VII B or the VIIIth race's element in the periodic table of elements extremely
A kind of molecular sieve adsorbent of few element.Molecular sieve is selected from X-type molecular sieve, Y type molecules in the molecular sieve adsorbent
Sieve, A type molecular sieve, ZSM types molecular sieve, modenite, beta molecular sieve, SAPO types molecular sieve, MCM-22, MCM-49, MCM-
56th, ZSM-5/ modenites, ZSM-5/ β zeolites, ZSM-5/Y, MCM-22/ modenite, ZSM-5/Magadiite, ZSM-5/ β
At least one of zeolite/modenite, ZSM-5/ β zeolites/Y zeolites or ZSM-5/Y zeolites/modenite.The element
The IIth element A is selected from least one of magnesium and calcium in periodic table；Ith B races element is selected from least one of copper, silver；IIIth B
Race's element is selected from least one of lanthanum, cerium, yttrium.
It is known in the art, during gas purification process, coal gas is purified using traditional handicraft, using desulfurizing tower again
It is middle to use iron oxide desulfurization；Using in de- naphthalene tower naphthalene is taken off with activated carbon；Benzene is taken off with activated carbon using debenzolizing tower again；3 are used altogether
Absorbing unit purifies coal gas successively.In device operation, device exit hydrogen sulfide, benzene and naphthalene are dense, compressor cooling tube
Road is frequently occluded, it is necessary to shut down dredging, influences production efficiency.Method using the present invention, has the following advantages that：（1）Using point
Benzene, naphthalene and hydrogen sulfide, organic sulfur can thoroughly be removed totally, solve the problems, such as line clogging by sub- sieve adsorbant.（2）It will
Adsorbent carries out multifunction, can desulfurization simultaneously, de- benzene, de- naphthalene, in an adsorption tower, comprehensive purifying mistake can be carried out at the same time
Journey so reduces the quantity of adsorption tower, reduces production cost.
Technical solution using the present invention：The coke-stove gas that coke oven comes out slightly enters into slightly de- benzene unit after de- benzene
Comprehensive adsorption tower, adsorption tower is interior containing molecular sieve adsorbent, while removes the aromatic hydrocarbons and sulfide in coal gas, enters back into pressure
After the compression of contracting machine, gas turbine power generation is sent to.De- naphthalene tower exit hydrogen sulfide content is less than 4mg/m3, naphthalene content is less than 4
mg/m3, tar content 0, the organic sulfur carried in gas is also removed, in combustion engine flue gas sulfur dioxide (SO2) emissions in below 7mg,
Device is stable, achieves preferable technique effect.
Description of the drawings
The coke oven gas purification flow diagram of the present invention that Fig. 1 is.
In Fig. 1,1 for coke oven coke-stove gas, 2 be logistics I, i.e. the slightly coke-stove gas after de- benzene, and 3 be logistics II；
4 be logistics III, and 5 be logistics IV, and 6 be regeneration coal gas, and 7 be the regeneration coal gas after heating, and 8 be water vapour, after 9 is heat exchange
Water vapour, 10 for regeneration after coal gas, 11 cooling tower exit gas；12 export liquid for cooling tower, and 13 rectifying columns export
The aromatic hydrocarbons arrived, 14 moisture discharged for rectifying column, 15 be the tail gas after adsorption tower.
I is de- crude benzol tower, and II is thick desulfurizing tower, and III is comprehensive adsorption tower, and IV is gas compression pump, and V is fuel engine power generation
Machine, VI is heat exchanger, and VII is heater, and VIII is cooler, and Ⅸ receives tower for tail gas adsorption, and Ⅹ is rectifying column.
Below by embodiment, the invention will be further elaborated, but is not limited only to the present embodiment.
Specific embodiment
【Embodiment 1】
As shown in Figure 1, a kind of method of coke-stove gas adsorption tower regeneration recycling aromatic hydrocarbons, comprises the following steps：
A. the coke-stove gas that coke oven comes out slightly forms logistics I into slightly de- benzene unit after de- benzene；
B. logistics I enters thick desulfurization unit, and logistics II is formed after thick desulfurization；
C. logistics II forms logistics III into comprehensive adsorption tower A；
E. after comprehensive adsorption tower A adsorption saturations, logistics II switches into comprehensive adsorption tower B, formation by comprehensive adsorption tower A
Stream III；
F. the part coal gas in logistics III enters heat exchanger, enters after heat exchange in comprehensive adsorption tower A, absorption in comprehensive adsorption tower A
Agent starts to regenerate, and temperature regenerates the gas containing aromatic hydrocarbons come and be sent to cooler when 150 DEG C of hot blows 10 are small；
G. after the completion of hot blow, regeneration coal gas is directly entered comprehensive adsorption tower A, progress cold blowing cooling is cold without heat exchanger
Less than 100 DEG C are blown to, completes regenerative process, comprehensive adsorption tower A is spare；
H. III remainder coal gas of logistics uses workshop section into follow-up；
I. the gas that cooler comes out, after tail gas adsorption tower, emptying；
J. the liquid that cooler comes out into rectifying column, after separating moisture, recycles aromatic hydrocarbons；
Containing molecular sieve adsorbent in the synthesis adsorption tower A and comprehensive adsorption tower B, while remove the aromatic hydrocarbons in coal gas
And sulfide.
Benzene concentration is in 1000~4000mg/m wherein in logistics II3Between, naphthalene concentration is in 200~500mg/m3Between, vulcanization
Hydrogen concentration is in 100~500mg/m3Between；Into comprehensive adsorption tower, the synthesis adsorption tower is interior to contain ZSM molecules for logistics II
Class adsorbent is sieved, while removes the aromatic hydrocarbons and sulfide in coal gas, forms logistics III, benzene concentration is less than 50mg/ in logistics III
m3, naphthalene concentration is less than 4 mg/m3Between, concentration of hydrogen sulfide is less than 4mg/m3；After logistics III enters compressor compresses, combustion gas is sent to
Turbine generates electricity, and device is continuously run 3 months or more, and benzene, naphthalene, concentration of hydrogen sulfide are stablized at comprehensive adsorption column outlet, gas compression
Machine does not occur plugging phenomenon yet, and sulfur dioxide concentration is less than 5mg/m in the logistics IV in the exhaust emissions of combustion engine3。
【Embodiment 2】
As shown in Figure 1, a kind of method of coke-stove gas adsorption tower regeneration recycling aromatic hydrocarbons, comprises the following steps：Coke oven comes out
Coke-stove gas into slightly de- benzene unit, slightly form logistics I after de- benzene；Logistics I enters thick desulfurization unit, formation after thick desulfurization
Stream II；Logistics II forms logistics III into comprehensive adsorption tower A；After comprehensive adsorption tower A adsorption saturations, logistics II is inhaled by comprehensive
Attached tower A switches into comprehensive adsorption tower B, forms logistics III；Part coal gas in logistics III enters heat exchanger, into comprehensive after heat exchange
It closes in adsorption tower A, adsorbent starts to regenerate in comprehensive adsorption tower A, and temperature is regenerated and when 100 ~ 250 DEG C of hot blows 5 ~ 100 are small
Gas containing aromatic hydrocarbons be sent to cooler；After the completion of hot blow, regeneration coal gas is directly entered comprehensive adsorption tower A without heat exchanger,
Cold blowing cooling is carried out, cold blowing completes regenerative process to less than 100 DEG C, and comprehensive adsorption tower A is spare；III remainder coal gas of logistics,
Workshop section is used into follow-up；The gas that cooler comes out, after tail gas adsorption tower, emptying；The liquid that cooler comes out enters
Rectifying column after separating moisture, recycles aromatic hydrocarbons；It is adsorbed in the synthesis adsorption tower A and comprehensive adsorption tower B containing molecular sieve
Agent, while remove aromatic hydrocarbons and sulfide in coal gas.
Benzene concentration is in 1000~4000mg/m wherein in logistics II3Between, naphthalene concentration is in 200~500mg/m3Between, vulcanization
Hydrogen concentration is in 100~500mg/m3Between；Logistics II enters comprehensive adsorption tower, contains modenite in the synthesis adsorption tower
Molecular sieve adsorbent, while remove aromatic hydrocarbons and sulfide in coal gas, logistics III is formed, benzene concentration is less than in logistics III
50mg/m3, naphthalene concentration is less than 4 mg/m3Between, concentration of hydrogen sulfide is less than 4mg/m3；After logistics III enters compressor compresses, it is sent to
Gas turbine power generation, device are continuously run 3 months or more, and benzene, naphthalene, concentration of hydrogen sulfide are stablized at comprehensive adsorption column outlet, coal gas
Compressor does not occur plugging phenomenon yet, and sulfur dioxide concentration is less than 5mg/m in the logistics IV of the exhaust emissions of combustion engine3。
【Embodiment 3】
The method of coke-stove gas adsorption tower regeneration recycling aromatic hydrocarbons, comprises the following steps：The coke-stove gas that coke oven comes out is into slightly
De- benzene unit slightly forms logistics I after de- benzene；Logistics I enters thick desulfurization unit, and logistics II is formed after thick desulfurization；Logistics II enters
Comprehensive adsorption tower A, forms logistics III；After comprehensive adsorption tower A adsorption saturations, logistics II is switched into comprehensive by comprehensive adsorption tower A
Adsorption tower B is closed, forms logistics III；Part coal gas in logistics III enters heat exchanger, enters after heat exchange in comprehensive adsorption tower A, comprehensive
It closes adsorbent in adsorption tower A to start to regenerate, temperature regenerates the gas containing aromatic hydrocarbons come and send when 100 ~ 250 DEG C of hot blows 5 ~ 100 are small
To cooler；After the completion of hot blow, regeneration coal gas is directly entered comprehensive adsorption tower A without heat exchanger, carries out cold blowing cooling,
Cold blowing completes regenerative process to less than 100 DEG C, and comprehensive adsorption tower A is spare；III remainder coal gas of logistics is used into follow-up
Workshop section；The gas that cooler comes out, after tail gas adsorption tower, emptying；The liquid that cooler comes out, into rectifying column, separation
After moisture, aromatic hydrocarbons is recycled；Containing molecular sieve adsorbent in the synthesis adsorption tower A and comprehensive adsorption tower B, while remove
Aromatic hydrocarbons and sulfide in coal gas.
Benzene concentration is in 1000~4000mg/m wherein in logistics II3Between, naphthalene concentration is in 200~500mg/m3Between, vulcanization
Hydrogen concentration is in 100~500mg/m3Between；Into comprehensive adsorption tower, the synthesis adsorption tower is interior to contain Y zeolites point for logistics II
Son sieve class adsorbent, while remove the aromatic hydrocarbons and sulfide in coal gas, logistics III is formed, benzene concentration is less than in logistics III
50mg/m3, naphthalene concentration is less than 4 mg/m3Between, concentration of hydrogen sulfide is less than 4mg/m3；Toluene, dimethylbenzene, ethylbenzene, trimethylbenzene, naphthalene,
Concentration in anthracene, Kun is less than 1 mg/m3Between；It is dense in sulfur dioxide, mercaptan, thioether, thiophene, methyl mercaptan, Dimethyl sulfide
Degree is less than 1 mg/m3Between.Logistics III into after compressor compresses, being sent to gas turbine power generation, device continuously run 3 months with
On, benzene, naphthalene, concentration of hydrogen sulfide are stablized at comprehensive adsorption column outlet, and gas compression pump does not occur plugging phenomenon, the tail gas of combustion engine yet
Sulfur dioxide concentration is less than 5mg/m in the logistics IV of discharge3。
【Embodiment 4】
The method of coke-stove gas adsorption tower regeneration recycling aromatic hydrocarbons, comprises the following steps：The coke-stove gas that coke oven comes out is into slightly
De- benzene unit slightly forms logistics I after de- benzene；Logistics I enters thick desulfurization unit, and logistics II is formed after thick desulfurization；Logistics II enters
Comprehensive adsorption tower A, forms logistics III；After comprehensive adsorption tower A adsorption saturations, logistics II is switched into comprehensive by comprehensive adsorption tower A
Adsorption tower B is closed, forms logistics III；Part coal gas in logistics III enters heat exchanger, enters after heat exchange in comprehensive adsorption tower A, comprehensive
It closes adsorbent in adsorption tower A to start to regenerate, temperature regenerates the gas containing aromatic hydrocarbons come and send when 100 ~ 250 DEG C of hot blows 5 ~ 100 are small
To cooler；After the completion of hot blow, regeneration coal gas is directly entered comprehensive adsorption tower A without heat exchanger, carries out cold blowing cooling,
Cold blowing completes regenerative process to less than 100 DEG C, and comprehensive adsorption tower A is spare；III remainder coal gas of logistics is used into follow-up
Workshop section；The gas that cooler comes out, after tail gas adsorption tower, emptying；The liquid that cooler comes out, into rectifying column, separation
After moisture, aromatic hydrocarbons is recycled；Containing molecular sieve adsorbent in the synthesis adsorption tower A and comprehensive adsorption tower B, while remove
Aromatic hydrocarbons and sulfide in coal gas.
Benzene concentration is in 1000~4000mg/m wherein in logistics II3Between, naphthalene concentration is in 200~500mg/m3Between, vulcanization
Hydrogen concentration is in 100~500mg/m3Between；Logistics II enters comprehensive adsorption tower, contains in the synthesis adsorption tower rare earth modified
Y molecular sieve class adsorbent, while remove fall coal gas in aromatic hydrocarbons and sulfide, formed logistics III, benzene concentration is small in logistics III
In 50mg/m3, naphthalene concentration is less than 4 mg/m3Between, concentration of hydrogen sulfide is less than 4mg/m3；Toluene, dimethylbenzene, ethylbenzene, trimethylbenzene,
Concentration in naphthalene, anthracene, Kun is less than 1 mg/m3Between；In sulfur dioxide, mercaptan, thioether, thiophene, methyl mercaptan, Dimethyl sulfide
Concentration is less than 1 mg/m3Between.After logistics III enters compressor compresses, gas turbine power generation is sent to, device is continuously run 3 months
More than, benzene, naphthalene, concentration of hydrogen sulfide are stablized at comprehensive adsorption column outlet, and gas compression pump does not occur plugging phenomenon, the tail of combustion engine yet
Sulfur dioxide concentration is less than 5mg/m in the logistics IV of gas discharge3。
【Embodiment 5】
The method of coke-stove gas adsorption tower regeneration recycling aromatic hydrocarbons, comprises the following steps：The coke-stove gas that coke oven comes out is into slightly
De- benzene unit slightly forms logistics I after de- benzene；Logistics I enters thick desulfurization unit, and logistics II is formed after thick desulfurization；Logistics II enters
Comprehensive adsorption tower A, forms logistics III；After comprehensive adsorption tower A adsorption saturations, logistics II is switched into comprehensive by comprehensive adsorption tower A
Adsorption tower B is closed, forms logistics III；Part coal gas in logistics III enters heat exchanger, enters after heat exchange in comprehensive adsorption tower A, comprehensive
It closes adsorbent in adsorption tower A to start to regenerate, temperature regenerates the gas containing aromatic hydrocarbons come and send when 100 ~ 250 DEG C of hot blows 5 ~ 100 are small
To cooler；After the completion of hot blow, regeneration coal gas is directly entered comprehensive adsorption tower A without heat exchanger, carries out cold blowing cooling,
Cold blowing completes regenerative process to less than 100 DEG C, and comprehensive adsorption tower A is spare；III remainder coal gas of logistics is used into follow-up
Workshop section；The gas that cooler comes out, after tail gas adsorption tower, emptying；The liquid that cooler comes out, into rectifying column, separation
After moisture, aromatic hydrocarbons is recycled；Containing molecular sieve adsorbent in the synthesis adsorption tower A and comprehensive adsorption tower B, while remove
Aromatic hydrocarbons and sulfide in coal gas.
Benzene concentration is in 1000~4000mg/m wherein in logistics II3Between, naphthalene concentration is in 200~500mg/m3Between, vulcanization
Hydrogen concentration is in 100~500mg/m3Between；Logistics II, into moisture separator, removes coke oven before comprehensive adsorption tower is entered
Moisture in coal gas.Then logistics II enters comprehensive adsorption tower, the interior ZSM-5 molecules containing zinc modification of the synthesis adsorption tower
Class adsorbent is sieved, molecular sieve silica alumina ratio is 200, while removes the aromatic hydrocarbons and sulfide in coal gas, forms logistics III, logistics III
Middle benzene concentration is less than 50mg/m3, naphthalene concentration is less than 4 mg/m3Between, concentration of hydrogen sulfide is less than 4mg/m3；Toluene, dimethylbenzene, second
Concentration in benzene, trimethylbenzene, naphthalene, anthracene, Kun is less than 1 mg/m3Between；Sulfur dioxide, mercaptan, thioether, thiophene, methyl mercaptan, first
Concentration in base thioether is less than 1 mg/m3Between.After logistics III enters compressor compresses, gas turbine power generation is sent to, device connects
Reforwarding row 3 months or more, benzene, naphthalene, concentration of hydrogen sulfide are stablized at comprehensive adsorption column outlet, and gas compression pump does not occur plugging yet and shows
As sulfur dioxide concentration is less than 5mg/m in the logistics IV of the exhaust emissions of combustion engine3。
【Embodiment 6】
The method of coke-stove gas adsorption tower regeneration recycling aromatic hydrocarbons, comprises the following steps：The coke-stove gas that coke oven comes out is into slightly
De- benzene unit slightly forms logistics I after de- benzene；Logistics I enters thick desulfurization unit, and logistics II is formed after thick desulfurization；Logistics II enters
Comprehensive adsorption tower A, forms logistics III；After comprehensive adsorption tower A adsorption saturations, logistics II is switched into comprehensive by comprehensive adsorption tower A
Adsorption tower B is closed, forms logistics III；Part coal gas in logistics III enters heat exchanger, enters after heat exchange in comprehensive adsorption tower A, comprehensive
It closes adsorbent in adsorption tower A to start to regenerate, temperature regenerates the gas containing aromatic hydrocarbons come and send when 100 ~ 250 DEG C of hot blows 5 ~ 100 are small
To cooler；After the completion of hot blow, regeneration coal gas is directly entered comprehensive adsorption tower A without heat exchanger, carries out cold blowing cooling,
Cold blowing completes regenerative process to less than 100 DEG C, and comprehensive adsorption tower A is spare；III remainder coal gas of logistics is used into follow-up
Workshop section；The gas that cooler comes out, after tail gas adsorption tower, emptying；The liquid that cooler comes out, into rectifying column, separation
After moisture, aromatic hydrocarbons is recycled；Containing molecular sieve adsorbent in the synthesis adsorption tower A and comprehensive adsorption tower B, while remove
Aromatic hydrocarbons and sulfide in coal gas.
Benzene concentration is in 1000~4000mg/m wherein in logistics II3Between, naphthalene concentration is in 200~500mg/m3Between, vulcanization
Hydrogen concentration is in 100~500mg/m3Between；Logistics II, into moisture separator, removes coke oven before comprehensive adsorption tower is entered
Moisture in coal gas；Then logistics II enters comprehensive adsorption tower, the ZSM-5 molecules being modified in the synthesis adsorption tower containing copper
The Y molecular sieve class adsorbent of sieve and zinc modification, molecular sieve silica alumina ratio is 150, while removes the aromatic hydrocarbons and sulfide in coal gas,
Logistics III is formed, benzene concentration is less than 50mg/m in logistics III3, naphthalene concentration is less than 4 mg/m3Between, concentration of hydrogen sulfide is less than 4mg/
m3；Concentration in toluene, dimethylbenzene, ethylbenzene, trimethylbenzene, naphthalene, anthracene, Kun is less than 1 mg/m3Between；Sulfur dioxide, mercaptan, thioether,
Concentration in thiophene, methyl mercaptan, Dimethyl sulfide is less than 1 mg/m3Between.After logistics III enters compressor compresses, combustion gas is sent to
Turbine generates electricity, and device is continuously run 3 months or more, and benzene, naphthalene, concentration of hydrogen sulfide are stablized at comprehensive adsorption column outlet, gas compression
Machine does not occur plugging phenomenon yet, and sulfur dioxide concentration is less than 5mg/m in the logistics IV of the exhaust emissions of combustion engine3。
After described molecular sieve adsorbent absorption aromatic hydrocarbons saturation, 150 DEG C with regeneration 10 is small in coal gas when, regeneration is completed
Afterwards, reuse.
【Embodiment 7】
The method of coke-stove gas adsorption tower regeneration recycling aromatic hydrocarbons, comprises the following steps：The coke-stove gas that coke oven comes out is into slightly
De- benzene unit slightly forms logistics I after de- benzene；Logistics I enters thick desulfurization unit, and logistics II is formed after thick desulfurization；Logistics II enters
Comprehensive adsorption tower A, forms logistics III；After comprehensive adsorption tower A adsorption saturations, logistics II is switched into comprehensive by comprehensive adsorption tower A
Adsorption tower B is closed, forms logistics III；Part coal gas in logistics III enters heat exchanger, enters after heat exchange in comprehensive adsorption tower A, comprehensive
It closes adsorbent in adsorption tower A to start to regenerate, temperature regenerates the gas containing aromatic hydrocarbons come and send when 100 ~ 250 DEG C of hot blows 5 ~ 100 are small
To cooler；After the completion of hot blow, regeneration coal gas is directly entered comprehensive adsorption tower A without heat exchanger, carries out cold blowing cooling,
Cold blowing completes regenerative process to less than 100 DEG C, and comprehensive adsorption tower A is spare；III remainder coal gas of logistics is used into follow-up
Workshop section；The gas that cooler comes out, after tail gas adsorption tower, emptying；The liquid that cooler comes out, into rectifying column, separation
After moisture, aromatic hydrocarbons is recycled；Containing molecular sieve adsorbent in the synthesis adsorption tower A and comprehensive adsorption tower B, while remove
Aromatic hydrocarbons and sulfide in coal gas.
Wherein, the method that slightly de- benzene unit uses methanol solvate extraction, thick desulfurization unit use calcium hydroxide desulfurizing agent, object
Benzene concentration is in 1000~4000mg/m in stream II3Between, naphthalene concentration is in 200~500mg/m3Between, concentration of hydrogen sulfide 100~
500mg/m3Between；Logistics II, into moisture separator, removes the moisture in coke-stove gas before comprehensive adsorption tower is entered；
Then logistics II enters the Y of comprehensive adsorption tower, the interior ZSM-5 molecular sieve being modified containing copper of the synthesis adsorption tower and zinc modification
Molecular sieve adsorbent, molecular sieve silica alumina ratio is 150, while removes the aromatic hydrocarbons and sulfide in coal gas, forms logistics III, object
Benzene concentration is less than 50mg/m in stream III3, naphthalene concentration is less than 4 mg/m3Between, concentration of hydrogen sulfide is less than 4mg/m3；Toluene, diformazan
Concentration in benzene, ethylbenzene, trimethylbenzene, naphthalene, anthracene, Kun is less than 1 mg/m3Between；Sulfur dioxide, mercaptan, thioether, thiophene, methyl sulphur
Concentration in alcohol, Dimethyl sulfide is less than 1 mg/m3Between.After logistics III enters compressor compresses, gas turbine power generation is sent to, is filled
It puts and continuously runs 3 months or more, benzene, naphthalene, concentration of hydrogen sulfide are stablized at comprehensive adsorption column outlet, and gas compression pump does not also block up
Pipe phenomenon, sulfur dioxide concentration is less than 5mg/m in the logistics IV of the exhaust emissions of combustion engine3.The molecular sieve adsorbent is inhaled
After attached aromatic hydrocarbons saturation, 150 DEG C in coal gas regeneration 10 it is small when, after the completion of regeneration, reuse.
【Embodiment 8】
The method of coke-stove gas adsorption tower regeneration recycling aromatic hydrocarbons, comprises the following steps：The coke-stove gas that coke oven comes out is into slightly
De- benzene unit slightly forms logistics I after de- benzene；Logistics I enters thick desulfurization unit, and logistics II is formed after thick desulfurization；Logistics II enters
Comprehensive adsorption tower A, forms logistics III；After comprehensive adsorption tower A adsorption saturations, logistics II is switched into comprehensive by comprehensive adsorption tower A
Adsorption tower B is closed, forms logistics III；Part coal gas in logistics III enters heat exchanger, enters after heat exchange in comprehensive adsorption tower A, comprehensive
It closes adsorbent in adsorption tower A to start to regenerate, temperature regenerates the gas containing aromatic hydrocarbons come and send when 100 ~ 250 DEG C of hot blows 5 ~ 100 are small
To cooler；After the completion of hot blow, regeneration coal gas is directly entered comprehensive adsorption tower A without heat exchanger, carries out cold blowing cooling,
Cold blowing completes regenerative process to less than 100 DEG C, and comprehensive adsorption tower A is spare；III remainder coal gas of logistics is used into follow-up
Workshop section；The gas that cooler comes out, after tail gas adsorption tower, emptying；The liquid that cooler comes out, into rectifying column, separation
After moisture, aromatic hydrocarbons is recycled；Containing molecular sieve adsorbent in the synthesis adsorption tower A and comprehensive adsorption tower B, while remove
Aromatic hydrocarbons and sulfide in coal gas.
Wherein, slightly de- benzene unit uses rare-earth Y molecular sieve class adsorbent using Y molecular sieve class adsorbent, thick desulfurization unit,
Benzene concentration is in 1000~4000mg/m in logistics II3Between, naphthalene concentration is in 200~500mg/m3Between, concentration of hydrogen sulfide is 100
~500mg/m3Between；Logistics II, into moisture separator, removes the water in coke-stove gas before comprehensive adsorption tower is entered
Point；Then logistics II enters comprehensive adsorption tower, the ZSM-5 molecular sieve and zinc modification being modified in the synthesis adsorption tower containing copper
Y molecular sieve class adsorbent, molecular sieve silica alumina ratio be 150, while remove fall coal gas in aromatic hydrocarbons and sulfide, formed logistics
III, benzene concentration is less than 50mg/m in logistics III3, naphthalene concentration is less than 4 mg/m3Between, concentration of hydrogen sulfide is less than 4mg/m3；Toluene,
Concentration in dimethylbenzene, ethylbenzene, trimethylbenzene, naphthalene, anthracene, Kun is less than 1 mg/m3Between；Sulfur dioxide, mercaptan, thioether, thiophene, first
Concentration in base mercaptan, Dimethyl sulfide is less than 1 mg/m3Between.After logistics III enters compressor compresses, gas turbine hair is sent to
Electricity, the tail gas of formation enter back into flue gas desulfuration and denitrification unit；Then it is vented.Device continuously operation 3 months or more, comprehensive adsorption tower
Exit benzene, naphthalene, concentration of hydrogen sulfide are stablized, and gas compression pump does not occur plugging phenomenon, the logistics IV of the exhaust emissions of combustion engine yet
Middle sulfur dioxide concentration is less than 5mg/m3.After described molecular sieve adsorbent absorption aromatic hydrocarbons saturation, 150 DEG C in coal gas again
When life 10 is small, after the completion of regeneration, reuse.
【Embodiment 9】
The method of coke-stove gas adsorption tower regeneration recycling aromatic hydrocarbons, comprises the following steps：The coke-stove gas that coke oven comes out is into slightly
De- benzene unit slightly forms logistics I after de- benzene；Logistics I enters thick desulfurization unit, and logistics II is formed after thick desulfurization；Logistics II enters
Comprehensive adsorption tower A, forms logistics III；After comprehensive adsorption tower A adsorption saturations, logistics II is switched into comprehensive by comprehensive adsorption tower A
Adsorption tower B is closed, forms logistics III；Part coal gas in logistics III enters heat exchanger, enters after heat exchange in comprehensive adsorption tower A, comprehensive
It closes adsorbent in adsorption tower A to start to regenerate, temperature regenerates the gas containing aromatic hydrocarbons come and send when 100 ~ 250 DEG C of hot blows 5 ~ 100 are small
To cooler；After the completion of hot blow, regeneration coal gas is directly entered comprehensive adsorption tower A without heat exchanger, carries out cold blowing cooling,
Cold blowing completes regenerative process to less than 100 DEG C, and comprehensive adsorption tower A is spare；III remainder coal gas of logistics is used into follow-up
Workshop section；The gas that cooler comes out, after tail gas adsorption tower, emptying；The liquid that cooler comes out, into rectifying column, separation
After moisture, aromatic hydrocarbons is recycled；Containing molecular sieve adsorbent in the synthesis adsorption tower A and comprehensive adsorption tower B, while remove
Aromatic hydrocarbons and sulfide in coal gas.
Wherein, slightly de- benzene unit is thick de- using the ZSM-5 molecular sieve of copper modification and the Y molecular sieve class adsorbent of zinc modification
The ZSM-5 molecular sieve and the Y molecular sieve class adsorbent of zinc modification that sulphur unit is modified using copper, in logistics II benzene concentration 1000~
4000mg/m3Between, naphthalene concentration is in 200~500mg/m3Between, concentration of hydrogen sulfide is in 100~500mg/m3Between；Logistics II exists
Into before comprehensive adsorption tower, into moisture separator, the moisture in coke-stove gas is removed；Then logistics II is adsorbed into comprehensive
The Y molecular sieve class adsorbent of tower, the interior ZSM-5 molecular sieve being modified containing copper of the synthesis adsorption tower and zinc modification, molecular sieve
Silica alumina ratio is 150, while removes the aromatic hydrocarbons and sulfide in coal gas, forms logistics III, and benzene concentration is less than 50mg/ in logistics III
m3, naphthalene concentration is less than 4 mg/m3Between, concentration of hydrogen sulfide is less than 4mg/m3；Toluene, dimethylbenzene, ethylbenzene, trimethylbenzene, naphthalene, anthracene, Kun
In concentration be less than 1 mg/m3Between；Concentration in sulfur dioxide, mercaptan, thioether, thiophene, methyl mercaptan, Dimethyl sulfide is less than
1 mg/m3Between.After logistics III enters compressor compresses, gas turbine power generation is sent to, the tail gas of formation enters back into flue gas desulfurization
Denitrogenation unit；Then it is vented.Device is continuously run 3 months or more, and benzene, naphthalene, concentration of hydrogen sulfide are stablized at comprehensive adsorption column outlet,
Gas compression pump does not occur plugging phenomenon yet, and sulfur dioxide concentration is less than 5mg/m in the logistics IV of the exhaust emissions of combustion engine3.Institute
After the molecular sieve adsorbent absorption aromatic hydrocarbons saturation stated, regenerated using coal gas of the purified coal gas at 180 DEG C or more, regeneration 5
After hour, the absorption property of adsorbent is stablized, and benzene concentration is less than 50mg/m in logistics III3, naphthalene concentration is less than 2mg/m3Between, sulphur
Change hydrogen concentration and be less than 2mg/m3。
【Embodiment 12】
The method of coke-stove gas adsorption tower regeneration recycling aromatic hydrocarbons, comprises the following steps：The coke-stove gas that coke oven comes out is into slightly
De- benzene unit slightly forms logistics I after de- benzene；Logistics I enters thick desulfurization unit, and logistics II is formed after thick desulfurization；Logistics II enters
Comprehensive adsorption tower A, forms logistics III；After comprehensive adsorption tower A adsorption saturations, logistics II is switched into comprehensive by comprehensive adsorption tower A
Adsorption tower B is closed, forms logistics III；Part coal gas in logistics III enters heat exchanger, enters after heat exchange in comprehensive adsorption tower A, comprehensive
It closes adsorbent in adsorption tower A to start to regenerate, temperature regenerates the gas containing aromatic hydrocarbons come and send when 100 ~ 250 DEG C of hot blows 5 ~ 100 are small
To cooler；After the completion of hot blow, regeneration coal gas is directly entered comprehensive adsorption tower A without heat exchanger, carries out cold blowing cooling,
Cold blowing completes regenerative process to less than 100 DEG C, and comprehensive adsorption tower A is spare；III remainder coal gas of logistics is used into follow-up
Workshop section；The gas that cooler comes out, after tail gas adsorption tower, emptying；The liquid that cooler comes out, into rectifying column, separation
After moisture, aromatic hydrocarbons is recycled；Containing molecular sieve adsorbent in the synthesis adsorption tower A and comprehensive adsorption tower B, while remove
Aromatic hydrocarbons and sulfide in coal gas.
Wherein, slightly de- benzene unit is thick de- using the ZSM-5 molecular sieve of copper modification and the Y molecular sieve class adsorbent of zinc modification
Sulphur unit uses the ZSM-5 molecular sieve class adsorbent of zinc modification, and benzene concentration is in 1000~4000mg/m in logistics II3Between, naphthalene
Concentration is in 200~500mg/m3Between, concentration of hydrogen sulfide is in 100~500mg/m3Between；Logistics II into comprehensive adsorption tower it
Before, into moisture separator, remove the moisture in coke-stove gas；Then logistics II is inhaled into comprehensive adsorption tower, the synthesis
The Y molecular sieve class adsorbent of ZSM-5 molecular sieve and zinc modification containing copper modification in attached tower, molecular sieve silica alumina ratio is 150, simultaneously
The aromatic hydrocarbons and sulfide in coal gas are fallen in removing, form logistics III, and benzene concentration is less than 50mg/m in logistics III3, naphthalene concentration is less than 4
mg/m3Between, concentration of hydrogen sulfide is less than 4mg/m3；Concentration in toluene, dimethylbenzene, ethylbenzene, trimethylbenzene, naphthalene, anthracene, Kun is less than 1
mg/m3Between；Concentration in sulfur dioxide, mercaptan, thioether, thiophene, methyl mercaptan, Dimethyl sulfide is less than 1 mg/m3Between.Object
After stream III enters compressor compresses, gas turbine power generation is sent to, the tail gas of formation enters back into flue gas desulfuration and denitrification unit；Then put
It is empty.Device continuously operation 3 months or more, benzene, naphthalene, concentration of hydrogen sulfide are stablized at comprehensive adsorption column outlet, and gas compression pump is not yet
There is plugging phenomenon, sulfur dioxide concentration is less than 5mg/m in the logistics IV of the exhaust emissions of combustion engine3.The molecular sieve is inhaled
Attached dose absorption aromatic hydrocarbons saturation after, 150 DEG C in coal gas regeneration 10 it is small when, after the completion of regeneration, reuse.
Wherein, the tar in logistics III, cyanide, ammonia concentration are less than 1mg/m3.Device continuously operation 4 months or more,
Benzene, naphthalene, concentration of hydrogen sulfide are stablized at comprehensive adsorption column outlet, and gas compression pump does not occur plugging phenomenon, the tail gas row of combustion engine yet
Middle sulfur dioxide concentration is put less than 5mg/m3。
Claims (10)
1. a kind of method of coke-stove gas adsorption tower regeneration recycling aromatic hydrocarbons, comprises the following steps：
A. the coke-stove gas that coke oven comes out slightly forms logistics I into slightly de- benzene unit after de- benzene；
B. logistics I enters thick desulfurization unit, and logistics II is formed after thick desulfurization；
C. logistics II forms logistics III into comprehensive adsorption tower A；
E. after comprehensive adsorption tower A adsorption saturations, logistics II switches into comprehensive adsorption tower B, formation by comprehensive adsorption tower A
Stream III；
F. the part coal gas in logistics III enters heat exchanger, enters after heat exchange in comprehensive adsorption tower A, absorption in comprehensive adsorption tower A
Agent starts to regenerate, and temperature regenerates the gas containing aromatic hydrocarbons come and be sent to cooler when 100 ~ 250 DEG C of hot blows 5 ~ 100 are small；
G. after the completion of hot blow, regeneration coal gas is directly entered comprehensive adsorption tower A, progress cold blowing cooling is cold without heat exchanger
Less than 100 DEG C are blown to, completes regenerative process, comprehensive adsorption tower A is spare；
H. III remainder coal gas of logistics uses workshop section into follow-up；
I. the gas that cooler comes out, after tail gas adsorption tower, emptying；
J. the liquid that cooler comes out into rectifying column, after separating moisture, recycles aromatic hydrocarbons；
Containing molecular sieve adsorbent in the synthesis adsorption tower A and comprehensive adsorption tower B, while remove the aromatic hydrocarbons in coal gas
And sulfide.
2. the method for coke-stove gas adsorption tower regeneration recycling aromatic hydrocarbons according to claim 1, it is characterised in that the object
Stream II is middle into moisture separator before comprehensive adsorption tower is entered, and removes the moisture in coke-stove gas；Logistics IV enters tail gas
Desulfurization and denitration unit, after scrubbing CO_2 and nitride, emptying, the heat exchanger passes through steam heating；In step g
Logistics III into gas turbine combustion power generation after compressor compresses, is sent to, the tail gas after gas turbine combustion forms logistics
IV, logistics IV is vented.
3. the method for coke-stove gas adsorption tower regeneration recycling aromatic hydrocarbons according to claim 1, it is characterised in that coal gas enters
After exchanging heat to heat exchanger, temperature reaches 100 ~ 250 DEG C, when synthesis adsorption tower A regeneration 5 ~ 100 is small, completes regenerative process；Water vapour
Into before heat exchanger, heated by heater.
4. the method for coke-stove gas adsorption tower regeneration recycling aromatic hydrocarbons according to claim 1, it is characterised in that comprehensive absorption
After the completion of tower A regeneration, to less than 80 DEG C, comprehensive adsorption tower A's coal gas cold blowing in logistics III comes into operation.
5. the method for coke-stove gas adsorption tower regeneration recycling aromatic hydrocarbons according to claim 4, it is characterised in that point
Son sieve class adsorbent is hydrophobic type adsorbent of molecular sieve；In the molecular sieve adsorbent containing the Ith A in the periodic table of elements,
At least one of II A, V A, I B, II B, III B, IV B, V B, VI B, VII B or the VIIIth race's element element.
6. the method for coke-stove gas adsorption tower regeneration recycling aromatic hydrocarbons according to claim 1, it is characterised in that the member
The IIth element A is selected from least one of magnesium and calcium in plain periodic table；Ith B races element is selected from least one of copper, silver；The
III B races element is selected from least one of lanthanum, cerium, yttrium；Molecular sieve is selected from X-type molecular sieve, Y in the molecular sieve adsorbent
Type molecular sieve, A type molecular sieve, ZSM types molecular sieve, modenite, beta molecular sieve, SAPO types molecular sieve, MCM-22, MCM-49,
MCM-56, ZSM-5/ modenite, ZSM-5/ β zeolites, ZSM-5/Y, MCM-22/ modenite, ZSM-5/Magadiite,
At least one of ZSM-5/ β zeolites/modenite, ZSM-5/ β zeolites/Y zeolites or ZSM-5/Y zeolites/modenite.
7. the method for coke-stove gas adsorption tower regeneration recycling aromatic hydrocarbons according to claim 1, it is characterised in that point
ZSM types molecular sieve includes at least one of ZSM-5, ZSM-23, ZSM-11, ZSM-48 in son sieve class adsorbent, wherein described
The silica alumina ratio of molecular sieve is more than 100.
8. the method for coke-stove gas adsorption tower regeneration recycling aromatic hydrocarbons according to claim 1, it is characterised in that point
Son sieve class adsorbent removes tar, cyanide, ammonia in coal gas simultaneously；Aromatic hydrocarbons described in step c is benzene, toluene, diformazan
At least one of benzene, ethylbenzene, trimethylbenzene, naphthalene, anthracene, Kun；Sulfide is hydrogen sulfide, sulfur dioxide, mercaptan, thioether, thiophene, first
At least one of base mercaptan, Dimethyl sulfide.
9. the method for coke-stove gas adsorption tower regeneration recycling aromatic hydrocarbons according to claim 1, it is characterised in that point
After son sieve class adsorbent adsorption saturation, when regeneration 10 ~ 30 is small in 150 ~ 220 DEG C of coal gas, after the completion of regeneration, reuse.
10. the method for coke-stove gas adsorption tower regeneration recycling aromatic hydrocarbons according to claim 1, it is characterised in that slightly de- benzene list
Member uses adsorbent of molecular sieve；Thick desulfurization unit use containing the Ith A in the periodic table of elements, II A, V A, I B, II B, III B, IV B,
The molecular sieve adsorbent of at least one of V B, VI B, VII B or the VIIIth race's element element.
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