CN109266403A - A method of naphthalene in removing bubbling fluidized bed gasification synthesis gas - Google Patents
A method of naphthalene in removing bubbling fluidized bed gasification synthesis gas Download PDFInfo
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- C10K—PURIFYING OR MODIFYING THE CHEMICAL COMPOSITION OF COMBUSTIBLE GASES CONTAINING CARBON MONOXIDE
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Abstract
The present invention relates to a kind of methods of naphthalene in removing bubbling fluidized bed gasification synthesis gas, by by the synthesis gas synthesized that gasifies in bubbling fluidized bed, by being filled in the adsorption tower of adsorbent, adsorbent includes special semicoke, activated alumina and active carbon；Wherein, special semicoke is made by following methods: in fixed bed, with N2For Balance Air, in 1-10%NH3Under (volume fraction) atmosphere or 1-5%O2Under (volume fraction) atmosphere, the coal in fixed bed is warming up to 500-900 DEG C with external heat source, constant temperature is not less than 10 minutes under normal pressure, then, it is passed through 20-30 DEG C of demineralized water from fixed bed top to be cooled down, demineralized water is directly contacted with semicoke, stops being passed through demineralized water when semicoke temperature is reduced to 90 DEG C, 10-38 DEG C is naturally cooled to, special semicoke is obtained.Present invention process very simple, easily operated, low energy consumption；And there is no the substances such as benzene are added, solve the problems, such as the de- naphthalene for the coal gas that bubbling fluidization bed gasification process generates, be with a wide range of applications.
Description
Technical field
The invention belongs to gas purification fields mainly to reduce particularly for the purification of bubbling fluidized bed gasification gas
Naphthalene content in coal gas.
Background technique
Faucet of the Coal Gasification Technology as coal chemical industry obtains significant progress in recent years, and various new technologies continue to bring out, but
Often containing the light hydrocarbons such as the different naphthalene of concentration, especially bubbling fluidized bed gas in the synthesis gas obtained that is coal after gasification
Change, since gasification temperature is lower, is often not more than 1200 DEG C, a certain amount of naphthalene is contained in coal gas, in the subsequent cooling of synthesis gas
In temperature-fall period, gaseous naphthalene can be attached to the inner wall of equipment or pipeline by cold crystallization, when serious even occluding device/pipe
Road causes the parking of gasification system, influences the process runs well of system.
Application publication number is that the Chinese invention patent application of 103930187 A of CN discloses a kind of method for removing naphthalene, should
Method is mainly used in the CO 2 waste gas generated in crude synthesis gas made from gasification of biomass and purification process.The solid is inhaled
Attached dose when removing naphthalene, first passes around pretreatment, makes on adsorbent surface the benzene of the film-form of one layer of formation (if contained in coal gas
Benzene, absorption benzene form film), the benzene of film-form can help the naphthalene in solid absorbent dissolution coal gas to promote to adsorb, and make
Naphthalene is integrated to solid adsorbent surfaces.Benzene is considered promoting naphthalene to be transferred to the superficial layer containing benzene by gas phase first as intermediary,
It is then transferred into solid absorbent.If being used for the purification of coal gasification coal gas, need to add benzene or benezene material in advance.Benzene quilt
Think to promote naphthalene to be transferred to the superficial layer containing benzene by gas phase first as intermediary, be then transferred into solid absorbent.Therefore,
Adsorbent material is very important comprising benzene in the above method, to also limit the extensive use of this method.
Summary of the invention
The object of the present invention is to provide in removing bubbling fluidized bed gasification synthesis gas that is a kind of efficient and having a wide range of application
The method of naphthalene, to solve the equipment or pipe in the naphthalene blocking gasification system in bubbling fluidized bed gasification synthesis gas in the prior art
Road.
To achieve the above object, the method use of naphthalene is as follows in a kind of removing bubbling fluidized bed gasification synthesis gas of the invention
Technical solution: a method of naphthalene in removing bubbling fluidized bed gasification synthesis gas, it will be by the conjunction synthesized of gasifying in bubbling fluidized bed
At gas by being filled in the adsorption tower of adsorbent, adsorbent includes special semicoke, activated alumina and active carbon；Wherein, special
Semicoke processed is made by following methods: in fixed bed, with N2For Balance Air, in 1-10%NH3Under atmosphere or 1-5%O2
Under atmosphere, the coal in fixed bed is warming up to 500-900 DEG C with external heat source, constant temperature was not less than 10 minutes under normal pressure, then, from
Fixed bed top is passed through 20-30 DEG C of demineralized water and is cooled down, and demineralized water is directly contacted with semicoke, when semicoke temperature is reduced to 90 DEG C
When stop be passed through demineralized water, naturally cool to 10-38 DEG C, obtain special semicoke.
Superheated steam using pressure not less than 0.2MPa, temperature not less than 300 DEG C is to the adsorption saturation in adsorption tower
Adsorbent is heated, and heating time is no less than the regeneration to realize adsorbent in 24 hours, and regeneration liquid waste is cooled to through cooler
Sewage disposal system outside battery limit (BL)；Or the coal of the nitrogen or cleaning using pressure not less than 0.2MPa, temperature not less than 300 DEG C
Gasification synthesis gas heats the adsorbent of the adsorption saturation in adsorption tower, and heating time is no less than 24 hours to realize absorption
The regeneration of agent, nitrogen or synthesis gas from coal gasification after adsorbent reactivation send to combustion system.
The adsorbent of regenerated heat be first passed into saturated vapor cool to 200 DEG C hereinafter, again with from extraneous nitrogen into
Row cold blowing cools to room temperature, and adsorbent can be recycled and be continued to use, and nitrogen is sent into exhausting pipeline and is directly vented.
Fill order of the adsorbent in adsorption tower is followed successively by activated alumina, active carbon and special half from the bottom up
Coke is passed through by the synthesis gas synthesized that gasifies in bubbling fluidized bed from the lower part of adsorption tower and is discharged from the top of adsorption tower.
The air-dried basis volatile matter mass fraction for being used to prepare the coal of special semicoke is not less than 45%, air-dried basis
Grey mass fraction is not more than 7%, and alkali metal mass fraction is not more than 2% in ash content, and silicone content mass fraction is not less than 30%.
The partial size of the special semicoke is not more than 1mm, and wherein partial size is big no more than the mass percentage of the coke of 0.6mm
In being equal to 70%, specific surface area is not less than 1300m2/ g, packing density are not less than 0.38g/m2, intensity is greater than 90%, biodiversity
Score is not more than 5.3%.
The iodine number of the active carbon is not less than 900mg/g, and specific surface area is not less than 1000m2/ g, packing density are not less than
0.38g/m2, intensity is greater than 95%, and moisture content is not more than 6.2%, and ash content mass fraction is not more than 6.7%, methylene
Indigo plant is not less than 10ml.
Beneficial effects of the present invention: bubbling fluidized bed gasification synthesis gas is by being equipped in the adsorption tower of adsorbent, exhausted big portion
Divide naphthalene, part H2The impurity such as S and a small amount of COS are adsorbed, and obtain the less purified gas of impurity, the coke in special semicoke can
Absorption and the most of naphthalene of retention and a small amount of lighter hydrocarbons, naphthalene content is not more than 15mg/Nm in coal gas after purification3.Present invention process ten
It is point simple, easily operated, low energy consumption；The feed coal for preparing adsorbent is easy to get very much and process is simple, with conventional coke
The problem of producer gas takes off naphthalene technique and compares, and corrosion and waste oil disposal of the oil wash technique to equipment is also not present, also there is no be added
The substances such as benzene solve the problems, such as the de- naphthalene for the coal gas that bubbling fluidization bed gasification process generates, are with a wide range of applications.
Further, the low-pressure steam or low-pressure nitrogen or the coal gas of cleaning that the regenerative process of adsorbent needs often are changed
The common intermediate products of work enterprise, especially coal chemical industry enterprises, tail gas or waste liquid after regeneration can be existing with chemical company
Waste water system and gas burning system combine, and therefore, regenerative process completely can be with the existing production system perfect combination of chemical company.
Further, wherein most water, light when coal gas passes sequentially through activated alumina, active carbon, special semicoke
Hydrocarbon, CO2, a small amount of naphthalene be adsorbed in activated alumina, active carbon layer, most of naphthalene and remaining a small amount of lighter hydrocarbons are in special half focus layer
It is adsorbed or is trapped in inside coke, play the role of purifying coal gas, have the effect of removing naphthalene well.Activated alumina
On the one hand can be with adsorption moisture with active carbon, while the hydro carbons being likely to occur in coal gas can also be reduced and enter special half focus layer,
Influence absorption of the semicoke to naphthalene.
Specific embodiment
With reference to embodiment, the embodiment of the present invention is furthur described in detail.Following embodiment is used for
Illustrate the present invention, but is not intended to limit the scope of the invention.
Embodiment 1
Bubbling fluidized bed gasification synthesis gas used in unstripped gas is stable colourless gas, wherein 100mg/Nm containing naphthalene3, H2S
926mg/Nm3, COS 1636mg/Nm3.Adsorbent, filling mode of the adsorbent in adsorption tower are filled in adsorption tower are as follows: from
Under be up sequentially filled active aluminium oxide, active carbon and special semicoke, by gasify in bubbling fluidized bed the synthesis gas that synthesizes from
The lower part of adsorption tower is passed through and is discharged from the top of adsorption tower.In the present embodiment, adsorption tower uses adsorption tower.Unstripped gas is in pressure
Enter adsorption tower when 0.6MPa, 40 DEG C of temperature, directly contacts and adsorbed with the adsorbent in adsorption tower.
Then the adsorbent of adsorption saturation in adsorption tower is heated using pressure 0.2MPa, 406 DEG C of temperature of superheated steam,
24 hours heating times, adsorbent naphthalene desorbed at relatively high temperatures, into high temperature to realize the regeneration of adsorbent
In steam, waste liquid containing naphthalene is formed after cooling, the mass fraction of naphthalene can enter the dirt outside battery limit (BL) less than 0.01% completely in waste liquid
Water treatment system, i.e. regeneration liquid waste cool to the sewage disposal system outside battery limit (BL) through cooler.Heat-adsorbent after regeneration
Temperature is 309 DEG C at this time, is first passed through pressure 1.8MPa, 200 DEG C of temperature of saturated vapor makes it cool to 170 DEG C, then with coming from
Extraneous low-pressure nitrogen 0.35MPa (G) carries out cold blowing and cools to room temperature, and low-pressure nitrogen enters exhausting pipeline and is directly vented.
Synthesis gas from coal gasification de-oiling takes off the result after naphthalene are as follows: 12mg/Nm containing naphthalene3, H2S 556mg/Nm3, COS1554mg/
Nm3, pressure 0.58MPa, 40 DEG C of temperature.
Special semicoke is the preparation method comprises the following steps: in fixed bed, with N2For Balance Air, volume fraction 1-10%NH3Under atmosphere,
Coal is rapidly heated to 500 DEG C with external heat source, constant temperature 20 minutes under normal pressure.Then, 30 DEG C of desalinations are passed through from fixed bed top
Water carries out quickly " punching, cool down ", and demineralized water is directly contacted with semicoke, stops being passed through desalination when semicoke temperature is reduced to 90 DEG C
Water naturally cools to 20 DEG C, obtains special semicoke.Special semicoke of the invention is high volatile Low-Ash Coal in fixed bed
In 1-10%NH3Under atmosphere " activation ", then quickly " punching, cool down " be made using demineralized water, oxidation reaction is utilized
With the synergistic effect of gasification reaction, special semicoke not only has pore structure abundant, and contains small point of a large amount of high activity
Subbase group (such as carboxyl, methyl) and the similar small molecule aromatic substance of naphthalene structure (containing 1-3 phenyl ring) have naphthalene significant
Affinity, therefore special semicoke to naphthalene have exceptionai absorption property.When unstripped gas pass sequentially through activated alumina,
When active carbon, special semicoke, wherein most water, lighter hydrocarbons, CO2, a small amount of naphthalene be adsorbed in activated alumina, active carbon layer,
Most of naphthalene and remaining a small amount of lighter hydrocarbons are adsorbed in special half focus layer or are trapped in inside coke, play the work of purification coal gas
With having the effect of removing naphthalene well, de- naphthalene precision can achieve less than 15mg/Nm3.It in other embodiments, can also be with
It is 1-5%O in volume fraction2It carries out making special semicoke under atmosphere.
The air-dried basis volatile matter mass fraction for being used to prepare the coal of special semicoke is not less than 45%, air-dried basis
Grey mass fraction is not more than 7%, and alkali metal mass fraction is not more than 2% in ash content, and silicone content mass fraction is not less than 30%.
The partial size of the special semicoke is not more than 1mm, and wherein partial size is big no more than the mass percentage of the coke of 0.6mm
In being equal to 70%, specific surface area is not less than 1300m2/ g, packing density are not less than 0.38g/m2, intensity is greater than 90%, biodiversity
Score is not more than 5.3%.
The iodine number of the active carbon is not less than 900mg/g, and specific surface area is not less than 1000m2/ g, packing density are not less than
0.38g/m2, intensity is greater than 95%, and moisture content is not more than 6.2%, and ash content mass fraction is not more than 6.7%, methylene
Indigo plant is not less than 10ml.
Embodiment 2
Bubbling fluidized bed gasification synthesis gas used in unstripped gas is stable colourless gas, wherein 117mg/Nm containing naphthalene3, H2S
965mg/Nm3, COS 1596mg/Nm3.Adsorbent, filling mode of the adsorbent in adsorption tower are filled in adsorption tower are as follows: from
Under be up sequentially filled active aluminium oxide, active carbon and special semicoke, by gasify in bubbling fluidized bed the synthesis gas that synthesizes from
The lower part of adsorption tower is passed through and is discharged from the top of adsorption tower.In the present embodiment, adsorption tower uses adsorption tower.Unstripped gas is in pressure
Enter adsorption tower when 0.6MPa, 40 DEG C of temperature, directly contacts and adsorbed with the adsorbent in adsorption tower.
Then the adsorbent of adsorption saturation in adsorption tower is added using pressure 0.35MPa, 403 DEG C of temperature of low pressure hot nitrogen
Heat, 24 hours heating times, adsorbent naphthalene desorbed at relatively high temperatures, into nitrogen to realize the regeneration of adsorbent
In gas or the synthesis gas from coal gasification of cleaning, form gas containing naphthalene, can towards outside battery limit (BL) boiler or incinerator as fuel, especially
It is higher using the calorific value of fuel when synthesis gas regeneration.Naphthalene burning generates water and carbon dioxide.Heat-adsorbent after regeneration this
Shi Wendu is 302 DEG C, is first passed through pressure 1.8MPa, 200 DEG C of temperature of saturated vapor makes it cool to 167 DEG C, then with from outside
The low-pressure nitrogen 0.35MPa (G) on boundary carries out cold blowing and cools to room temperature, and low-pressure nitrogen enters exhausting pipeline and is directly vented.
Synthesis gas from coal gasification de-oiling takes off the result after naphthalene are as follows: 13mg/Nm containing naphthalene3, H2S 561mg/Nm3, COS1493mg/
Nm3, pressure 0.58MPa, 40 DEG C of temperature.
Special semicoke is the preparation method comprises the following steps: in fixed bed, with N2For Balance Air, volume fraction 1-10%NH3Under atmosphere,
Coal is rapidly heated to 500 DEG C with external heat source, constant temperature 20 minutes under normal pressure.Then, 30 DEG C of desalinations are passed through from fixed bed top
Water carries out quickly " punching, cool down ", and demineralized water is directly contacted with semicoke, stops being passed through desalination when semicoke temperature is reduced to 90 DEG C
Water naturally cools to 20 DEG C, obtains special semicoke.Special semicoke of the invention is high volatile Low-Ash Coal in fixed bed
In 1-10%NH3Under atmosphere " activation ", then quickly " punching, cool down " be made using demineralized water, oxidation reaction is utilized
With the synergistic effect of gasification reaction, special semicoke not only has pore structure abundant, and contains small point of a large amount of high activity
Subbase group (such as carboxyl, methyl) and the similar small molecule aromatic substance of naphthalene structure (containing 1-3 phenyl ring) have naphthalene significant
Affinity, therefore special semicoke to naphthalene have exceptionai absorption property.When unstripped gas pass sequentially through activated alumina,
When active carbon, special semicoke, wherein most water, lighter hydrocarbons, CO2, a small amount of naphthalene be adsorbed in activated alumina, active carbon layer,
Most of naphthalene and remaining a small amount of lighter hydrocarbons are adsorbed in special half focus layer or are trapped in inside coke, play the work of purification coal gas
With having the effect of removing naphthalene well, de- naphthalene precision can achieve less than 15mg/Nm3。
The air-dried basis volatile matter mass fraction for being used to prepare the coal of special semicoke is not less than 45%, air-dried basis
Grey mass fraction is not more than 7%, and alkali metal mass fraction is not more than 2% in ash content, and silicone content mass fraction is not less than 30%.
The partial size of the special semicoke is not more than 1mm, and wherein partial size is big no more than the mass percentage of the coke of 0.6mm
In being equal to 70%, specific surface area is not less than 1300m2/ g, packing density are not less than 0.38g/m2, intensity is greater than 90%, biodiversity
Score is not more than 5.3%.
The iodine number of the active carbon is not less than 900mg/g, and specific surface area is not less than 1000m2/ g, packing density are not less than
0.38g/m2, intensity is greater than 95%, and moisture content is not more than 6.2%, and ash content mass fraction is not more than 6.7%, methylene
Indigo plant is not less than 10ml.
Embodiment 3
Bubbling fluidized bed gasification synthesis gas used in unstripped gas is stable colourless gas, wherein 102mg/Nm containing naphthalene3, H2S
913mg/Nm3, COS 1498mg/Nm3.Adsorbent, filling mode of the adsorbent in adsorption tower are filled in adsorption tower are as follows: from
Under be up sequentially filled active aluminium oxide, active carbon and special semicoke, by gasify in bubbling fluidized bed the synthesis gas that synthesizes from
The lower part of adsorption tower is passed through and is discharged from the top of adsorption tower.In the present embodiment, adsorption tower uses adsorption tower.Unstripped gas is in pressure
Enter adsorption tower when 0.6MPa, 40 DEG C of temperature, directly contacts and adsorbed with the adsorbent in adsorption tower.
Then the adsorbent of adsorption saturation in adsorption tower is added using pressure 0.38MPa, 409 DEG C of temperature of low pressure hot nitrogen
Heat, 24 hours heating times, adsorbent naphthalene desorbed at relatively high temperatures, into nitrogen to realize the regeneration of adsorbent
In gas or the synthesis gas from coal gasification of cleaning, form gas containing naphthalene, can towards outside battery limit (BL) boiler or incinerator as fuel, especially
It is higher using the calorific value of fuel when synthesis gas regeneration.Naphthalene burning generates water and carbon dioxide.Heat-adsorbent after regeneration this
Shi Wendu is 307 DEG C, is first passed through pressure 1.8MPa, 200 DEG C of temperature of saturated vapor makes it cool to 165 DEG C, then with from outside
The low-pressure nitrogen 0.35MPa (G) on boundary carries out cold blowing and cools to room temperature, and low-pressure nitrogen enters exhausting pipeline and is directly vented.
Synthesis gas from coal gasification de-oiling takes off the result after naphthalene are as follows: 10mg/Nm containing naphthalene3, H2S 528mg/Nm3, COS1402mg/
Nm3, pressure 0.58MPa, 40 DEG C of temperature.
Special semicoke is the preparation method comprises the following steps: in fixed bed, using N2 as Balance Air, volume fraction 1-10%NH3Under atmosphere,
Coal is rapidly heated to 500 DEG C with external heat source, constant temperature 20 minutes under normal pressure.Then, 30 DEG C of desalinations are passed through from fixed bed top
Water carries out quickly " punching, cool down ", and demineralized water is directly contacted with semicoke, stops being passed through desalination when semicoke temperature is reduced to 90 DEG C
Water naturally cools to 20 DEG C, obtains special semicoke.Special semicoke of the invention is high volatile Low-Ash Coal in fixed bed
In 1-10%NH3Under atmosphere " activation ", then quickly " punching, cool down " be made using demineralized water, oxidation reaction is utilized
With the synergistic effect of gasification reaction, special semicoke not only has pore structure abundant, and contains small point of a large amount of high activity
Subbase group (such as carboxyl, methyl) and the similar small molecule aromatic substance of naphthalene structure (containing 1-3 phenyl ring) have naphthalene significant
Affinity, therefore special semicoke to naphthalene have exceptionai absorption property.When unstripped gas pass sequentially through activated alumina,
When active carbon, special semicoke, wherein most water, lighter hydrocarbons, CO2, a small amount of naphthalene be adsorbed in activated alumina, active carbon layer,
Most of naphthalene and remaining a small amount of lighter hydrocarbons are adsorbed in special half focus layer or are trapped in inside coke, play the work of purification coal gas
With having the effect of removing naphthalene well, de- naphthalene precision can achieve less than 15mg/Nm3。
The air-dried basis volatile matter mass fraction for being used to prepare the coal of special semicoke is not less than 45%, air-dried basis
Grey mass fraction is not more than 7%, and alkali metal mass fraction is not more than 2% in ash content, and silicone content mass fraction is not less than 30%.
The partial size of the special semicoke is not more than 1mm, and wherein partial size is big no more than the mass percentage of the coke of 0.6mm
In being equal to 70%, specific surface area is not less than 1300m2/ g, packing density are not less than 0.38g/m2, intensity is greater than 90%, biodiversity
Score is not more than 5.3%.
The iodine number of the active carbon is not less than 900mg/g, and specific surface area is not less than 1000m2/ g, packing density are not less than
0.38g/m2, intensity is greater than 95%, and moisture content is not more than 6.2%, and ash content mass fraction is not more than 6.7%, methylene
Indigo plant is not less than 10ml.
Intensity is according to the strong of " GB/T 20451-2006 active carbon ball disk method strength test method " measurement in the present invention
Degree.
Present invention process very simple, easily operated, low energy consumption；The feed coal for preparing adsorbent is very easy to get and processes
Process is simple, and the renewable recycling of adsorbent, lasts a long time；It is low-pressure steam that the regenerative process of adsorbent needs, low
Pressing nitrogen or the coal gas of cleaning is often chemical company, especially the common intermediate products of coal chemical industry enterprises, the tail gas after regeneration
Or waste liquid can be in conjunction with the existing waste water system of chemical company and gas burning system, therefore, regenerative process completely can be with chemical industry
The existing production system perfect combination of enterprise；Compared with conventional coke-oven coal qi exhaustion naphthalene technique, process flow of the invention is significantly simple
The problem of short, energy consumption is significant lower, and corrosion and waste oil disposal of the oil wash technique to equipment is also not present；It solves and mildly gasified
The de- naphthalene problem for the coal gas that journey generates, and de- naphthalene precision can achieve 15mg/Nm3。
The above case study on implementation is merely to illustrate the preferred embodiment of the present invention, but the present invention is not limited to above-mentioned embodiment party
Formula, the field those of ordinary skill within the scope of knowledge, it is made any within the spirit and principles in the present invention
Modification, equivalent substitute and improvement etc., are regarded as the protection scope of the application.
Claims (7)
1. a kind of method of naphthalene in removing bubbling fluidized bed gasification synthesis gas, it is characterised in that: will be by gasifying in bubbling fluidized bed
For the synthesis gas of synthesis by being filled in the adsorption tower of adsorbent, adsorbent includes special semicoke, activated alumina and active carbon；
Wherein, special semicoke is made by following methods: in fixed bed, with N2It is 1-10% in volume fraction for Balance Air
NH3Under atmosphere or volume fraction is 1-5%O2Under atmosphere, the coal in fixed bed is warming up to 500-900 DEG C with external heat source, often
It depresses constant temperature to be not less than 10 minutes, then, is passed through 20-30 DEG C of demineralized water from fixed bed top and is cooled down, demineralized water and semicoke
It directly contacts, stops being passed through demineralized water when semicoke temperature is reduced to 90 DEG C, naturally cool to 10-38 DEG C, obtain special semicoke.
2. the method for naphthalene in removing bubbling fluidized bed gasification synthesis gas according to claim 1, it is characterised in that: using pressure
Superheated steam of the power not less than 0.2MPa, temperature not less than 300 DEG C heats the adsorbent of the adsorption saturation in adsorption tower,
Heating time is no less than the regeneration to realize adsorbent in 24 hours, and regeneration liquid waste cools to the sewage treatment outside battery limit (BL) through cooler
System；Or the synthesis gas from coal gasification of the nitrogen or cleaning using pressure not less than 0.2MPa, temperature not less than 300 DEG C is to absorption
The adsorbent of adsorption saturation in tower is heated, and heating time is no less than the regeneration to realize adsorbent in 24 hours, adsorbent
Nitrogen or synthesis gas from coal gasification after regeneration send to combustion system.
3. the method for naphthalene in removing bubbling fluidized bed gasification synthesis gas according to claim 2, it is characterised in that: regenerated
The adsorbent of heat is first passed into saturated vapor and cools to 200 DEG C hereinafter, being cooled to often with carrying out cold blowing from extraneous nitrogen again
Temperature, adsorbent can be recycled and be continued to use, and nitrogen is sent into exhausting pipeline and is directly vented.
4. the method for naphthalene in removing bubbling fluidized bed gasification synthesis gas according to claim 1, it is characterised in that: the suction
The attached dose of fill order in adsorption tower is followed successively by activated alumina, active carbon and special semicoke from the bottom up, by bubbling fluidization
Bed in gasify synthesis synthesis gas be passed through from the lower part of adsorption tower and from the top of adsorption tower be discharged.
5. the method for removing naphthalene in bubbling fluidized bed gasification synthesis gas described in any one of -4 according to claim 1, feature
It is: is used to prepare the air-dried basis volatile matter mass fraction of the coal of special semicoke not less than 45%, air-dried basis is grey
Mass fraction is not more than 7%, and alkali metal mass fraction is not more than 2% in ash content, and silicone content mass fraction is not less than 30%.
6. the method for naphthalene in removing bubbling fluidized bed gasification synthesis gas according to claim 1, it is characterised in that: the spy
The partial size of semicoke processed is not more than 1mm, and wherein the mass percentage of coke of the partial size no more than 0.6mm is more than or equal to 70%, than
Surface area is not less than 1300m2/ g, packing density are not less than 0.38g/m2, greater than 90%, moisture content is not more than intensity
5.3%.
7. the method for naphthalene in removing bubbling fluidized bed gasification synthesis gas according to claim 1, it is characterised in that: the work
Property charcoal iodine number be not less than 900mg/g, specific surface area be not less than 1000m2/ g, packing density are not less than 0.38g/m2, intensity is greater than
95%, moisture content is not more than 6.2%, and ash content mass fraction is not more than 6.7%, and methylene blue is not less than 10ml.
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