CN108239559A - Gas purification adsorption tower and its method for purifying coal gas - Google Patents
Gas purification adsorption tower and its method for purifying coal gas Download PDFInfo
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- CN108239559A CN108239559A CN201710590582.7A CN201710590582A CN108239559A CN 108239559 A CN108239559 A CN 108239559A CN 201710590582 A CN201710590582 A CN 201710590582A CN 108239559 A CN108239559 A CN 108239559A
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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
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- 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
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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
- C10K1/003—Removal of contaminants of acid contaminants, e.g. acid gas removal
- C10K1/004—Sulfur containing contaminants, e.g. hydrogen sulfide
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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
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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
- C10K1/32—Purifying combustible gases containing carbon monoxide with selectively adsorptive solids, e.g. active carbon
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- 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
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- 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
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- 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
- B01D2257/304—Hydrogen sulfide
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- 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
- B01D2257/306—Organic sulfur compounds, e.g. mercaptans
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- 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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Abstract
The technical issues of the present invention relates to a kind of gas purification adsorption towers, mainly solve adsorbent bed gas in the prior art and are unevenly distributed, and desulfurizing and dearomatizing effect is poor.The present invention is by using a kind of gas purification adsorption tower, including housing（1）, feed inlet（2）, discharge port（3）, sewage draining exit（4）Dumping pit（5）, charging hole（6）, adsorbent support plate（7）And thermometer boss（8）Composition；Feed inlet（2）Positioned at housing（1）Lower side, sewage draining exit（4）Positioned at housing（1）Lower part middle position, adsorbent support plate（7）Positioned at housing（1）The top of internal feed inlet；Housing（1）Inside includes the technical solution of different packing layers, 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 the adsorption tower and its purification method of a kind of coke-stove gas, particularly for the coke-oven coal of fuel engine power generation
The adsorption tower of gas and the purification method of coal gas.
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 connect 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 connected on from the first appendix that desulphurization system comes out by four compressor filters；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 coal gas equipressure heating obtained by step b；D, by coal gas pre-filtering obtained by step c；E, it by coal gas essence filtering obtained by step d, obtains
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
Compound solution impregnated carrier 2~6 hours, 2~4 hours dry by 120 DEG C, 280~350 DEG C of roastings are made after 4~6 hours
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 is adsorbed using molecular sieve
The adsorption tower of agent, while the report of sulfide and aromatic hydrocarbons is removed, coal gas adsorption tower of the present invention removes sulfide and aromatic hydrocarbons completely,
Targetedly solve that presently, there are purify sordid technical problem during coal gas power generation.
Invention content
The first technical problem to be solved by the present invention is when being generated electricity in the prior art using coke-stove gas, and coke-stove gas is net
Sulfide in change, tar, benzene and naphthalene removing be not clean, compressor cooling pipe is caused easily to block, sulfur dioxide (SO2) emissions it is exceeded
Technical problem, the present invention provide a kind of new gas purification adsorption tower.In production of the adsorption tower for coke-stove gas power generation, tool
There is gas purification clean, sulphur emissions are low, and power generator is stable, and it is excellent that adsorbent service efficiency is high and equipment cost is relatively low
Point.
In order to solve the above technical problems, the technical solution adopted by the present invention is as follows：A kind of gas purification adsorption tower, including shell
Body 1, feed inlet 2, discharge port 3,4 dumping pit 5 of sewage draining exit, charging hole 6, adsorbent support plate 7 and thermometer boss 8 form；Into
Material mouth 2 is located at the lower side of housing 1, and sewage draining exit 4 is located at the lower part middle position of housing 1, and adsorbent support plate 7 is located at shell
The top of feed inlet inside body 1；Dumping pit 5 is located at the side of 7 upper body 1 of adsorbent support plate；Thermometer boss 8 is located at
The side centre position of housing 1, discharge port 3 are located at the upper cover middle position of housing 1, and charging hole 6 is located at the upper envelope of housing 1
Head top, the side of discharge port 3；Housing（1）Gas distributor is contained in inside, and the gas distributor contains pre-distributor,
Gas distributor is connected by pre-distributor and feed inlet 2.
In above-mentioned technical proposal, preferred technical solution is
Gas distribution tube 3 is circular ring shape and the concyclic heart of adsorption tower；The quantity of gas distribution tube 3 is N, wherein N=D/（aL）, N is
>=1 positive integer, D are adsorption tower diameter, and L is absorption tower height degree, and a is speed of the gas in tower, and gas distribution tube 3 is along absorption
Tower diameter equidistantly distributes.
In above-mentioned technical proposal, preferred technical solution is gas distribution tube 3 since connection pre-distributor both ends, along
The semicircular ring of gas distribution tube 3 has Unequal distance trepanning to distal end, and the spacing of Kong Yukong is gradually reduced, and latter section of spacing is
0.5 ~ 1 times of adjacent the last period spacing.
In above-mentioned technical proposal, preferred technical solution is gas distribution tube 3 since connection pre-distributor both ends, along
The semicircular ring of gas distribution tube 3, the latter perforated area is 1.0 ~ 1.5 times of previous perforated area, until the diameter of trepanning
Equal to the diameter of gas distribution tube.
In above-mentioned technical proposal, preferred technical solution is the trepanning interlaced arrangement on the gas distribution tube 3 of different-diameter.
In above-mentioned technical proposal, preferred technical solution is the 0.5 of a diameter of feed tube diameter of most external of pre-distributor 2
~ 2 times, 1.1 ~ 3 times of a diameter of intermediate 6 diameter of air outlet pipe of most external of pre-distributor 2.
In above-mentioned technical proposal, preferred technical solution is intermediate air outlet pipe 6 close to feed pipe one end, percent opening for 20% ~
100%；It is 30% ~ 80% that intermediate air outlet pipe 6 opens percent opening preferred scope at adsorption tower diameter.
In above-mentioned technical proposal, preferred technical solution is 2 race diameter of a diameter of pre-distributor of gas distribution tube 3
5% ~ 50%, the diameter of outer ring gas distribution tube is adjacent inner coil 1.05 ~ 2 times of pipe diameter of distribution.
In above-mentioned technical proposal, preferred technical solution has circular cone head cover, circular cone top for the trepanning top of gas distribution tube 3
Lid is fixed on by upright short tube on gas distribution tube 3, and there are supplied gas disengaging between the trepanning of circular cone head cover and gas distribution tube 3
Gap.
The second technical problem to be solved by the present invention is to provide a kind of using the adsorption tower for solving one of technical problem, suction
The method of attached purification coal gas；In production of this method for coke-stove gas power generation, clean with gas purification, sulphur emissions are low, hair
The advantages of electric installation is stable, and adsorbent service efficiency is high and equipment cost is relatively low.
In order to solve the above technical problems, the technical solution adopted by the present invention is as follows：The method for purifying coal gas, including following several
A step：
A. the coke-stove gas that coke oven comes out enters adsorption tower lower part, by gas distributor, gas mixing space and lower part gas
Body distribution layer, gas mixing is uniform, forms logistics I；
B. logistics I enters coarse filtration layer III, removes dust and tar, forms logistics II；
C. logistics II enters water accepting layer IV, after removing the part moisture content in coke-stove gas, forms logistics III；
D. logistics III enters desulfurization layer V, removing hydrogen sulfide, part aromatic hydrocarbons and part organic sulfur；Form logistics IV；
E. logistics IV enters Porous deproteinized bone layer VI, removes remainder aromatic hydrocarbons and remainder organic sulfur, then from discharge port 3 from
Open purifying column.
In above-mentioned technical proposal, preferred technical solution also passes through lower gas blending space I for coal gas.
In above-mentioned technical proposal, preferred technical solution also passes through Porous deproteinized bone layer VI for coal gas.
In above-mentioned technical proposal, preferred technical solution also passes through upper gas distribution layer VII for coal gas.
In above-mentioned technical proposal, preferred technical solution also passes through upper gas blending space VIII for coal gas.
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, and is needed to shut down and be dredged, influences production efficiency.
Method using the present invention, has the following advantages that：（1）Using adsorbent of molecular sieve, can by benzene, naphthalene and hydrogen sulfide,
Organic sulfur can be removed thoroughly totally, solve the problems, such as line clogging.（2）Adsorbent is subjected to multifunction, can simultaneously desulfurization,
De- benzene, de- naphthalene, in an adsorption tower, can be carried out at the same time comprehensive purifying process, reduce the quantity of adsorption tower in this way, reduce
Production cost.
Technical solution using the present invention：The coke-stove gas that coke oven comes out enters slightly de- benzene unit, slightly enters after de- benzene
Dewatering unit, dewatered coal gas enter comprehensive purifying tower, molecular sieve adsorbent are contained in purifying column, while remove coal gas
In aromatic hydrocarbons and sulfide, after entering back into compressor compresses, be sent to gas turbine power generation.Taking off naphthalene tower exit hydrogen sulfide content is
0 mg/m3, naphthalene content is 0 mg/m3, tar content 0, the organic sulfur carried in gas is also removed, dioxy in combustion engine flue gas
Change sulphur emissions in 10m hereinafter, device is stable, achieve preferable technique effect.
Description of the drawings
The adsorption tower schematic diagram of the present invention that Fig. 1 is.
In Fig. 1,1 is housing, and 2 be feed inlet, and 3 be discharge port, and 4 be sewage draining exit, and 5 be dumping pit, and 6 be charging hole, and 7 are
Adsorbent support plate, 8 be thermometer boss, and 9 be gas distributor.
In Fig. 1, I is lower gas blending space, and II is lower gas distribution layer, and III is coarse filtration layer, and IV is water suction
Layer, V is desulfurization layer, and VI is Porous deproteinized bone layer, and VII is portion's gas distribution layers, and VIII is upper gas blending space.
The present invention will be further described below by way of examples, but is not limited only to the present embodiment.
Specific embodiment
【Embodiment 1】
As shown in Figure 1, gas purification adsorption tower, including housing, feed inlet, discharge port, sewage draining exit dumping pit, charging hole, suction
Attached dose of support plate and thermometer boss composition；Feed inlet is located at the lower side of housing, and sewage draining exit is located at the lower part center of housing
Between position, adsorbent support plate is located at the top of the feed inlet of enclosure interior；Dumping pit is located at adsorbent support plate upper body
Side；Thermometer boss is located at the side centre position of housing, and discharge port is located at the upper cover middle position of housing, charging
Hole is located at the upper cover top of housing, the side of discharge port；Enclosure interior contains gas distributor, and the gas distributor contains
There is pre-distributor, gas distributor is connected by pre-distributor with feed inlet.
The gas distributor, including feed pipe, pre-distributor, gas distribution tube, the connection charging of pre-distributor one end
Pipe, the other end go deep into the inside of adsorption tower, and pre-distributor includes annular gap and intermediate air outlet pipe, and intermediate air outlet pipe is close to inhale
Circular hole is provided at attached tower diameter, gas distribution tube is connected on pre-distributor and annular gap perforation；It is wrapped on gas distribution tube
Containing round hole.Gas distribution tube is circular ring shape and the concyclic heart of adsorption tower；The quantity of gas distribution tube is gas distribution tube edge
Adsorption tower diameter equidistantly distributes.
【Embodiment 2】
As shown in Figure 1, gas purification adsorption tower, including housing, feed inlet, discharge port, sewage draining exit dumping pit, charging hole, suction
Attached dose of support plate and thermometer boss composition；Feed inlet is located at the lower side of housing, and sewage draining exit is located at the lower part center of housing
Between position, adsorbent support plate is located at the top of the feed inlet of enclosure interior；Dumping pit is located at adsorbent support plate upper body
Side；Thermometer boss is located at the side centre position of housing, and discharge port is located at the upper cover middle position of housing, charging
Hole is located at the upper cover top of housing, the side of discharge port；Enclosure interior contains gas distributor, and the gas distributor contains
There is pre-distributor, gas distributor is connected by pre-distributor with feed inlet.
The gas distributor, including feed pipe, pre-distributor, gas distribution tube, the connection charging of pre-distributor one end
Pipe, the other end go deep into the inside of adsorption tower, and pre-distributor includes annular gap and intermediate air outlet pipe, and intermediate air outlet pipe is close to inhale
Circular hole is provided at attached tower diameter, gas distribution tube is connected on pre-distributor and annular gap perforation；It is wrapped on gas distribution tube
Containing round hole.Gas distribution tube is circular ring shape and the concyclic heart of adsorption tower；The quantity of gas distribution tube is gas distribution tube edge
Adsorption tower diameter equidistantly distributes.
Gas distribution tube 3 is circular ring shape and the concyclic heart of adsorption tower；The quantity of gas distribution tube 3 is 4,3 edge of gas distribution tube
Adsorption tower diameter equidistantly distributes.
Gas distribution tube 3 is since connection pre-distributor both ends, along the semicircular ring of gas distribution tube 3, to distally having
Unequal distance trepanning, the spacing of Kong Yukong are gradually reduced, and latter section of spacing is 0.6 times of adjacent the last period spacing.
Gas distribution tube 3 is since connection pre-distributor both ends, along the semicircular ring of gas distribution tube 3, the latter trepanning
Area is 1.05 times of previous perforated area, until the diameter of trepanning is equal to the diameter of gas distribution tube.The gas of different-diameter
Trepanning interlaced arrangement on body distributor pipe 3.
【Embodiment 3】
As shown in Figure 1, gas purification adsorption tower, including housing, feed inlet, discharge port, sewage draining exit dumping pit, charging hole, suction
Attached dose of support plate and thermometer boss composition；Feed inlet is located at the lower side of housing, and sewage draining exit is located at the lower part center of housing
Between position, adsorbent support plate is located at the top of the feed inlet of enclosure interior；Dumping pit is located at adsorbent support plate upper body
Side；Thermometer boss is located at the side centre position of housing, and discharge port is located at the upper cover middle position of housing, charging
Hole is located at the upper cover top of housing, the side of discharge port；Enclosure interior contains gas distributor, and the gas distributor contains
There is pre-distributor, gas distributor is connected by pre-distributor with feed inlet.
Gas distributor, including feed pipe 1, pre-distributor 2, gas distribution tube 3,2 one end of pre-distributor connects feed pipe,
The other end gos deep into the inside of adsorption tower, and pre-distributor 2 includes annular gap 5 and intermediate air outlet pipe 6, and intermediate air outlet pipe 6 is close to suction
Circular hole is provided at attached tower diameter, gas distribution tube 3 is connected on pre-distributor 2 and annular gap 5 penetrates through；On gas distribution tube 3
Include round hole 7.
Gas distribution tube 3 is circular ring shape and the concyclic heart of adsorption tower；The quantity of gas distribution tube 3 is 4,3 edge of gas distribution tube
Adsorption tower diameter equidistantly distributes.
Gas distribution tube 3 is since connection pre-distributor both ends, along the semicircular ring of gas distribution tube 3, to distally having
Unequal distance trepanning, the spacing of Kong Yukong are gradually reduced, and latter section of spacing is 0.6 times of adjacent the last period spacing.
Gas distribution tube 3 is since connection pre-distributor both ends, along the semicircular ring of gas distribution tube 3, the latter trepanning
Area is 1.05 times of previous perforated area, until the diameter of trepanning is equal to the diameter of gas distribution tube.The gas of different-diameter
Trepanning interlaced arrangement on body distributor pipe 3.
0.6 times of a diameter of feed tube diameter of most external of pre-distributor 2, a diameter of centre of most external of pre-distributor 2
1.13 times of 6 diameter of air outlet pipe.
Intermediate air outlet pipe 6 is close to feed pipe one end, percent opening 30%；Intermediate air outlet pipe 6 is opened out at adsorption tower diameter
Porosity is 40%.
The 10% of 2 race diameter of a diameter of pre-distributor of gas distribution tube 3, the diameter of outer ring gas distribution tube is adjacent
Inner ring is distributed 1.1 times of pipe diameter.
Circular cone head cover is arranged at the trepanning top of gas distribution tube 3, and circular cone head cover is fixed on gas distribution tube 3 by upright short tube
On, there are the gaps of supplied gas disengaging between the trepanning of circular cone head cover and gas distribution tube 3.
【Embodiment 4】
The method for purifying coal gas, including the following steps：A. the coke-stove gas that coke oven comes out enters the absorption of embodiment 1
Tower, lower gas blending space and lower gas distribution layer, gas mixing is uniform, forms logistics I；
B. logistics I enters coarse filtration layer III, removes dust and tar, forms logistics II；
C. logistics II enters water accepting layer IV, after removing the part moisture content in coke-stove gas, forms logistics III；
D. logistics III enters desulfurization layer V, removing hydrogen sulfide, part aromatic hydrocarbons and part organic sulfur；Form logistics IV；
E. logistics IV enters Porous deproteinized bone layer VI, removes remainder aromatic hydrocarbons and remainder organic sulfur, then from discharge port 3 from
Open purifying column.
Containing the Y molecular sieve class adsorbent being modified containing copper in the comprehensive purifying tower, while remove the aromatic hydrocarbons in coal gas
And sulfide, benzene concentration is less than 50mg/m in logistics herein3, naphthalene concentration is less than 2mg/m3Between, concentration of hydrogen sulfide is less than 2mg/
m3；After purified coal gas enters compressor compresses, it is sent to gas turbine power generation, the tail gas after gas turbine combustion enters tail gas
After desulphurization and denitration unit, scrubbing CO_2 and nitride, tail gas emptying.Device continuous operation 3 months or more, comprehensive purifying
Tower exit benzene, naphthalene, concentration of hydrogen sulfide are stablized, and gas compression pump does not occur plugging phenomenon yet, dioxy in the exhaust emissions of combustion engine
Change sulphur concentration and be less than 7mg/m3。
【Embodiment 5】
The method for purifying coal gas, including the following steps：A. the coke-stove gas that coke oven comes out enters adsorption tower lower gas
Blending space and lower gas distribution layer, gas mixing is uniform, forms logistics I；B. logistics I enters coarse filtration layer III, removes powder
Dirt and tar form logistics II；C. logistics II enters water accepting layer IV, after removing the part moisture content in coke-stove gas, forms logistics
Ⅲ；D. logistics III enters desulfurization layer V, removing hydrogen sulfide, part aromatic hydrocarbons and part organic sulfur；Form logistics IV；E. logistics IV
Into Porous deproteinized bone layer VI, remainder aromatic hydrocarbons and remainder organic sulfur are removed, then by Porous deproteinized bone layer VI, wherein, take off virtue
Hydrocarbon filler is Y zeolite adsorbents, coal gas by upper gas distribution layer VII and upper gas blending space VIII, from discharge port 3 from
Open purifying column.
In above-mentioned comprehensive purifying tower, filler B, filler C, filler D are the ZSM-5 molecular sieve class adsorbent containing zinc modification, point
Son sieve silica alumina ratio be 600, while remove fall coal gas in aromatic hydrocarbons and sulfide, toluene, dimethylbenzene, ethylbenzene, trimethylbenzene,
Concentration in naphthalene, anthracene, Kun is less than 1 mg/m3Between；Hydrogen sulfide, sulfur dioxide, mercaptan, thioether, thiophene, methyl mercaptan, methyl
Concentration in thioether is less than 1 mg/m3Between.Device continuous operation 3 months or more, comprehensive purifying tower exit benzene, naphthalene, vulcanization
Hydrogen concentration is stablized, and gas compression pump does not occur plugging phenomenon yet, and sulfur dioxide concentration is less than 5mg/m in the exhaust emissions of combustion engine3。
【Embodiment 6】
The coke-stove gas that coke oven comes out enters slightly de- benzene unit, slightly forms logistics I after de- benzene, wherein benzene concentration exists in logistics I
1000~3500mg/m3Between, naphthalene concentration is in 200~500mg/m3Between, concentration of hydrogen sulfide is in 100~500mg/m3Between；Object
Stream I enters the Y molecular sieve of comprehensive purifying tower, the interior ZSM-5 molecular sieve being modified containing copper of the comprehensive purifying tower and zinc modification
Class adsorbent, while remove aromatic hydrocarbons and sulfide in coal gas, logistics II is formed, benzene concentration is less than 60mg/m in logistics II3,
Naphthalene concentration is less than 1 mg/m3Between, concentration of hydrogen sulfide is less than 1mg/m3；After logistics II enters compressor compresses, it is sent to gas turbine
Power generation, device continuous operation 3 months or more, comprehensive purifying tower exit benzene, naphthalene, concentration of hydrogen sulfide are stablized, gas compression pump
Do not occur plugging phenomenon, sulfur dioxide concentration is less than 5mg/m in the exhaust emissions of combustion engine3。
【Embodiment 7】
The coke-stove gas that coke oven comes out enters slightly de- benzene unit, subsequently into thick desulfurization unit, slightly logistics after the thick desulfurization of de- benzene
Middle benzene concentration is in 1000~3000mg/m3Between, naphthalene concentration is in 200~400mg/m3Between, concentration of hydrogen sulfide 100~
400mg/m3Between；Logistics enters moisture separator, after removing the operative liquid moisture in coke-stove gas, into comprehensive purifying
The Y molecular sieve class adsorbent of tower, the interior ZSM-5 molecular sieve being modified containing copper of the comprehensive purifying tower and zinc modification, wherein
The silica alumina ratio 400 of ZSM-5 molecular sieve, the silica alumina ratio of Y molecular sieve are more than 100.Adsorbent removes in coal gas simultaneously
Aromatic hydrocarbons and sulfide, herein in logistics benzene concentration be less than 50mg/m3, naphthalene concentration is less than 2mg/m3Between, concentration of hydrogen sulfide is less than
2mg/m3；After purified coal gas enters compressor compresses, it is sent to gas turbine power generation, the tail gas after gas turbine combustion enters
Tail gas desulfurization, denitration unit, after scrubbing CO_2 and nitride, tail gas emptying.Device continuous operation 3 months or more, it is comprehensive
Purifying column exit benzene, naphthalene, concentration of hydrogen sulfide are stablized, and gas compression pump does not occur plugging phenomenon yet, in the exhaust emissions of combustion engine
Sulfur dioxide concentration is less than 5mg/m3。
【Embodiment 8】
The coke-stove gas that coke oven comes out enters slightly de- benzene unit, and logistics I is slightly formed after de- benzene, and the slightly de- benzene unit uses
The method of methanol solvate extraction, removes the benzene of part in coal gas, benzene concentration is in 1000~4000mg/m wherein in logistics I3Between,
Naphthalene concentration is in 200~500mg/m3Between；Logistics I enters thick desulfurization unit, and thick desulfurization unit is removed using limestone desulfurizer
The hydrogen sulfide of part in coal gas forms logistics II after thick desulfurization, wherein II concentration of hydrogen sulfide of logistics is in 100~500mg/m3It
Between；Logistics II enters moisture separator, after removing the operative liquid moisture in coke-stove gas, forms logistics III；Logistics III enters
Comprehensive purifying tower, containing ZSM-5 molecular sieve class adsorbent in the comprehensive purifying tower, while remove the aromatic hydrocarbons in coal gas and
Sulfide forms logistics IV, wherein, benzene concentration is less than 100mg/m in logistics IV3, naphthalene concentration is less than 4 mg/m3Between, hydrogen sulfide
Concentration is less than 4mg/m3；After logistics IV enters compressor compresses, it is sent to gas turbine combustion and generates electricity, the tail after gas turbine combustion
Gas forms logistics V；Logistics V enters tail gas desulfurization, denitration unit, after scrubbing CO_2 and nitride, tail gas formation
VI emptying of stream.
ZSM-5 molecular sieve class adsorbent containing zinc modification in above-mentioned comprehensive purifying tower, molecular sieve silica alumina ratio are
600, while remove aromatic hydrocarbons and sulfide in coal gas, the concentration in toluene, dimethylbenzene, ethylbenzene, trimethylbenzene, naphthalene, anthracene, Kun is small
In 1 mg/m3Between；Concentration in hydrogen sulfide, sulfur dioxide, mercaptan, thioether, thiophene, methyl mercaptan, Dimethyl sulfide is less than 1
mg/m3Between.Device continuous operation 3 months or more, comprehensive purifying tower exit benzene, naphthalene, concentration of hydrogen sulfide are stablized, gas compression
Machine does not occur plugging phenomenon yet, and sulfur dioxide concentration is less than 5mg/m in the exhaust emissions of combustion engine3。
Claims (10)
1. a kind of gas purification adsorption tower, including housing（1）, feed inlet（2）, discharge port（3）, sewage draining exit（4）Dumping pit（5）、
Charging hole（6）, adsorbent support plate（7）And thermometer boss（8）Composition；Feed inlet（2）Positioned at housing（1）Lower side,
Sewage draining exit（4）Positioned at housing（1）Lower part middle position, adsorbent support plate（7）Positioned at housing（1）Internal feed inlet
Top；Dumping pit（5）Positioned at adsorbent support plate（7）Upper body（1）Side；Thermometer boss（8）Positioned at housing（1）'s
Side centre position, discharge port（3）Positioned at housing（1）Upper cover middle position, charging hole（6）Positioned at housing（1）It is upper
End socket upper part discharge port（3）Side；Housing（1）Contain gas distributor in inside（9）, the gas distributor（9）Contain
Pre-distributor, gas distributor pass through pre-distributor and feed inlet（2）Connection.
2. gas purification adsorption tower according to claim 1, it is characterised in that the gas distributor, including feed pipe
（1）, pre-distributor（2）, gas distribution tube（3）, pre-distributor（2）One end connects feed pipe, and the other end gos deep into the interior of adsorption tower
Portion, pre-distributor（2）Including annular gap（5）With intermediate air outlet pipe（6）, intermediate air outlet pipe（6）It is opened at adsorption tower diameter
There are circular hole, gas distribution tube（3）It is connected to pre-distributor（2）On and annular gap（5）Perforation；Gas distribution tube（3）On include
Round hole（7）.
3. gas purification adsorption tower according to claim 1, it is characterised in that gas distribution tube（3）For circular ring shape and inhale
The attached concyclic heart of tower；Gas distribution tube（3）Quantity be N, wherein N=D/（aL）, N be >=1 positive integer, D be adsorption tower diameter, L
For adsorb tower height degree, a be speed of the gas in tower, gas distribution tube（3）It is equidistantly distributed along adsorption tower diameter.
4. gas purification adsorption tower according to claim 1, it is characterised in that gas distribution tube（3）From connection pre-distributor
Both ends start, along gas distribution tube（3）Semicircular ring, there is Unequal distance trepanning to distal end, the spacing of Kong Yukong is gradually reduced,
Latter section of spacing is 0.5 ~ 1 times of adjacent the last period spacing.
5. gas purification adsorption tower according to claim 1, it is characterised in that gas distribution tube（3）From connection pre-distributor
Both ends start, along gas distribution tube（3）Semicircular ring, the latter perforated area is 1.0 ~ 1.5 times of previous perforated area,
Until the diameter of trepanning is equal to the diameter of gas distribution tube.
6. gas purification adsorption tower according to claim 1, it is characterised in that the gas distribution tube of different-diameter（3）On
Trepanning interlaced arrangement.
7. gas purification adsorption tower according to claim 1, it is characterised in that pre-distributor（2）Most external it is a diameter of into
0.5 ~ 2 times of expects pipe diameter, pre-distributor（2）The a diameter of intermediate air outlet pipe of most external（6）1.1 ~ 3 times of diameter.
8. gas purification adsorption tower according to claim 1, it is characterised in that intermediate air outlet pipe（6）Close to feed pipe one
End, percent opening are 20% ~ 100%；Intermediate air outlet pipe（6）It is 30% ~ 80% that percent opening is opened at adsorption tower diameter.
9. gas purification adsorption tower according to claim 1, it is characterised in that gas distribution tube（3）A diameter of pre- distribution
Device（2）The 5% ~ 50% of race diameter, the diameter of outer ring gas distribution tube is adjacent inner coil 1.05 ~ 2 times of pipe diameter of distribution.
10. gas purification adsorption tower according to claim 1, it is characterised in that gas distribution tube（3）Trepanning top have
Circular cone head cover, circular cone head cover are fixed on gas distribution tube by upright short tube（3）On, circular cone head cover and gas distribution tube（3）Open
There are the gaps of supplied gas disengaging between hole.
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| CN201710590582.7A CN108239559A (en) | 2017-07-19 | 2017-07-19 | Gas purification adsorption tower and its method for purifying coal gas |
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| CN104893766A (en) * | 2015-05-28 | 2015-09-09 | 中冶焦耐工程技术有限公司 | Coal gas combined purification tower |
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| CN105749819A (en) * | 2016-04-07 | 2016-07-13 | 北京清新环境技术股份有限公司 | Novel lower-pressure-drop distribution plate applicable to multilayered bed |
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| CN1433830A (en) * | 2003-02-11 | 2003-08-06 | 东南大学 | Long cellosilk high-speed filter |
| CN101279229A (en) * | 2007-04-04 | 2008-10-08 | 中国石油化工股份有限公司 | Trickle bed reactor |
| WO2010090863A2 (en) * | 2009-01-21 | 2010-08-12 | Rentech, Inc. | System and method for dual fluidized bed gasification |
| CN104893766A (en) * | 2015-05-28 | 2015-09-09 | 中冶焦耐工程技术有限公司 | Coal gas combined purification tower |
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