CN105327692A - Activated carbon regenerative furnace, and gas purification method and apparatus using same - Google Patents
Activated carbon regenerative furnace, and gas purification method and apparatus using same Download PDFInfo
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- CN105327692A CN105327692A CN201510648539.2A CN201510648539A CN105327692A CN 105327692 A CN105327692 A CN 105327692A CN 201510648539 A CN201510648539 A CN 201510648539A CN 105327692 A CN105327692 A CN 105327692A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/30—Processes for preparing, regenerating, or reactivating
- B01J20/34—Regenerating or reactivating
- B01J20/345—Regenerating or reactivating using a particular desorbing compound or mixture
- B01J20/3458—Regenerating or reactivating using a particular desorbing compound or mixture in the gas phase
- B01J20/3466—Regenerating or reactivating using a particular desorbing compound or mixture in the gas phase with steam
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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
- B01D53/06—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 with moving adsorbents, e.g. rotating beds
- B01D53/08—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 with moving adsorbents, e.g. rotating beds according to the "moving bed" method
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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
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/72—Organic compounds not provided for in groups B01D53/48 - B01D53/70, e.g. hydrocarbons
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
- B01J20/20—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising free carbon; comprising carbon obtained by carbonising processes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
- B01J20/30—Processes for preparing, regenerating, or reactivating
- B01J20/34—Regenerating or reactivating
- B01J20/3416—Regenerating or reactivating of sorbents or filter aids comprising free carbon, e.g. activated carbon
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/30—Active carbon
- C01B32/354—After-treatment
- C01B32/36—Reactivation or regeneration
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/30—Active carbon
- C01B32/39—Apparatus for the preparation thereof
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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
- B01D2253/102—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
- B01D2253/30—Physical properties of adsorbents
- B01D2253/302—Dimensions
- B01D2253/304—Linear dimensions, e.g. particle shape, diameter
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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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- 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
- B01D2257/704—Solvents not covered by groups B01D2257/702 - B01D2257/7027
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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
- B01D2257/708—Volatile organic compounds V.O.C.'s
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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
- B01D2257/90—Odorous compounds not provided for in groups B01D2257/00 - B01D2257/708
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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
Provided is a compact activated carbon regenerative furnace (regenerating method) to facilitate incorporation into gas purification apparatuses; further provided are a gas purification method and apparatus that use the activated carbon regenerative furnace and enable the rate of removal of chemical substances in exhaust gas to be kept at a high level over a long period. The activated carbon regenerative furnace is provided with an activated carbon supply section (21) for supplying activated carbon (K) having lowered adsorption capacity, an activated carbon regenerating section (22) wherein is formed a moving bed through which the supplied activated carbon flows downward due to gravity, and the activated carbon (K) is regenerated by the activated carbon (K) and water vapor (V) being brought into countercurrent contact in the presence of heat in the moving bed and a water gasification reaction being induced, a cooling section (26) for cooling the regenerated activated carbon, and an activated carbon discharge section (27) for discharging the cooled activated carbon. The weight ratio (WV/WK) of the flow rate (WV)(kg/h) of the water vapor and the flow rate (WK)(kg/h) of the activated carbon that are brought into countercurrent contact is preferably set to 0.05-1.0.
Description
The divisional application that the present application is application number is 200980150220.X, denomination of invention is " active carbon is composed and lived regenerating furnace and make use of method for gas purification and the device that this active carbon composes regenerating furnace of living ", the applying date is the application on December 1st, 2009.
Technical field
The present invention relates to active carbon to compose regenerating furnace alive and utilize this active carbon to compose method for gas purification and the device of regenerating furnace alive.In particular to the method for gas purification for reclaiming in Exhaust Gas harmful, the odorant in contained organic solvent and/or removing Exhaust Gas and purifier, and the active carbon when adsorption capacity related to for active carbon used in gas cleaning plant reduces, its adsorption capacity being recovered is composed and is lived renovation process and compose regenerating furnace alive.
Background technology
All the time, known by the removing of solid absorbent particle absorption contain from the gas that factory etc. discharge be harmful to, odorant and/or organic solvent equal solvent composition, for the gas cleaning plant (gas treatment equipment) of recycling design composition while Purge gas.
(patent document 1) discloses following gas treatment equipment: the processed gas absorption portion to gas treatment equipment supplies solid absorbent particle continuously, then the adsorber particles of having adsorbed solvent composition in processed gas absorption portion is delivered to adsorbent reactivation portion, adsorber particles is regenerated, adsorber particles after regeneration is supplied to processed gas absorption portion again, thus recycles adsorber particles continuously.This gas treatment equipment, this adsorbent reactivation portion is supplied to not concretive gas, make the solvent composition desorption that adsorber particles is adsorbed thus, make desorption and the solvent composition that obtains is admitted to condensation separator in company with not concretive gas, thus be separated, recycling design composition.
Adsorption capacity is recovered by making solvent composition desorption make adsorbent reactivation in existing device, if but long-term this device of use continuously, then the material of heaviness or solid matter accumulate gradually, and cause inside and outside adsorbent can not desorption completely, the problem that the adsorption capacity that its result causes adsorbent reduces, the removal rate of chemical substance in Exhaust Gas reduces.
The adsorbent that adsorption capacity reduces needs to take out from device, after regeneration of living is composed in outside, send gas treatment equipment back to again, or abandons and supplement new adsorbent in gas treatment equipment.Therefore, need the tax of the adsorption capacity of installing for recovering the adsorbent reduced regenerating furnace alive as a part for gas treatment equipment.
When using active carbon as adsorbent, regeneration is lived in the tax of the active carbon that adsorption capacity reduces can by process same method to carry out with tax when manufacturing active carbon is alive.Active carbon composes renovation process of living roughly has the medicine using the medicines such as zinc chloride to compose the method for living, and uses the gas of steam, carbon dioxide etc. to compose the method for living.In general, medicine compose live there is being separated of material with carbon element and medicine, be separated after the problem such as process of medicine, have the high such shortcoming of cost.Therefore, the gas utilizing steam etc. that adopts composes the method for living more.Composing the device of living as carrying out steam, using rotary kiln, stove, multistage fluidized furnace etc. are lived in flowing tax.But when use rotary kiln, flowing are composed and lived stove, in device, the mixing of generation material with carbon element, therefore can not process continuously and need batch-type to run, be not suitable as the device be assembled in existing continous way gas treatment equipment as above.In addition, composing in flowing stove of living, in multistage fluidized furnace, usually using higher fuel such as hydrogen content such as burning coke-stove gas, LPG, LNG etc. and the high-temperature combustion gas that obtains as composing lively atmosphere body.These gases are the non-oxidizing gas of the moisture containing 10 ~ 50%, are also used to the heating of material with carbon element, and the amount therefore composing lively atmosphere body is very many relative to the amount of material with carbon element.In such a device, the amount that can load the material with carbon element in stove is less than 20% relative to the volume of stove, considerably less, has the shortcoming of larger-scale unit, and this becomes composes regenerating furnace of living and be assembled into obstacle in gas treatment equipment.
Patent document 1: Japanese Laid-Open Patent Publication 52-14580 publication
Summary of the invention
Invent problem to be solved
In view of above-mentioned existing situation, the object of this invention is to provide the densification active carbon be easily assembled in gas cleaning plant and compose regenerating furnace of living (composing renovation process of living), in addition, the object of the invention is to utilize this active carbon to compose regenerating furnace of living, providing can the method for gas purification of removal rate of chemical substance in the Exhaust Gas of long term maintenance high value and device.
For solving the method for problem
The present inventors find, by forming the mobile layer that active carbon moves down by gravity, utilize and will be heated to compose temperature alive in this mobile layer from the indirect of outside and/or eddy-current heating etc., be the steam of 100% relative to the active carbon counter current contact essence moved down, thus active carbon can be composed regenerating furnace densification of living.Find in addition, be adsorbent with active carbon, repeating in the gas cleaning plant of absorption/desorption operation, a certain amount of by taking out in active carbon that chemically material desorption has fallen, the adsorption capacity of regenerating furnace via water-based gas reaction activity recovery charcoal of living is composed with above-mentioned active carbon, again be supplied to the formation of absorption process, above-mentioned problem can be solved.That is, active carbon of the present invention is composed renovation process alive and composes live regenerating furnace and method for gas purification and device as follows.
(1). a kind of active carbon composes renovation process of living, and the method has following operation: the active carbon supply step of the active carbon that supply adsorption capacity reduces; The active carbon supplied moves down by gravity and forms mobile layer, makes active carbon and steam heat counter current contact in this mobile layer, water-based gas reaction occurs, thus makes the regenerating active carbon operation of regenerating active carbon; By the refrigerating work procedure of the active carbon cooling after regeneration; And the active carbon of being discharged by cooled active carbon discharges operation.
(2). the active carbon according to above-mentioned (1) composes renovation process of living, wherein, the flow W of the steam of counter current contact
v(kg/h) with the flow W of active carbon
k(kg/h) weight ratio (W
v/ W
k) be 0.05 ~ 1.0.
(3). a kind of method for gas purification, the method has following operation: the gas containing chemical substance is contacted with active carbon, thus makes the absorption process of this chemical substance of charcoal absorption; The active carbon having adsorbed chemical substance is contacted with not concretive gas, thus makes the desorption operation of this chemical substance desorption; The active carbon fallen by chemical substance desorption is supplied to the active carbon circulating process of above-mentioned absorption process again; A part for the active carbon fallen by chemical substance desorption is taken out, the active carbon taken out moves down formation mobile layer by gravity, in this mobile layer, make active carbon and steam heat while counter current contact, water-based gas reaction occurs, thus makes the regenerating active carbon operation of regenerating active carbon; By the refrigerating work procedure of the active carbon cooling after regeneration; And, cooled active carbon is discharged the active carbon being again supplied to above-mentioned absorption process and discharge operation.
(4). a kind of active carbon composes regenerating furnace of living, and this stove and accessory is standby: for supplying the active carbon supply unit of the active carbon that adsorption capacity reduces; For making supplied active carbon move down formation mobile layer by gravity, in this mobile layer, making active carbon and steam heat counter current contact, water-based gas reaction occurring, thus makes the regenerating active carbon portion of regenerating active carbon; For the cooling end by the active carbon cooling after regeneration; And, for the active carbon discharge portion that cooled active carbon is discharged.
(5). the active carbon according to above-mentioned (4) composes regenerating furnace of living, and this stove and accessory is ready for use on the heating part of the thermograde that formation temperature rises along gravity direction in mobile layer.
(6). the active carbon according to above-mentioned (5) composes regenerating furnace of living, and this stove and accessory is ready for use on and forms the heating part that maximum temperature difference is the thermograde of more than 200 DEG C.
(7). a kind of gas cleaning plant, this device has: the gas containing chemical substance is contacted with active carbon, thus makes the adsorption section of this chemical substance of charcoal absorption; The active carbon having adsorbed chemical substance is contacted with not concretive gas, thus makes the desorption portion of this chemical substance desorption; The active carbon fallen by chemical substance desorption is supplied to the active carbon circulation portions of above-mentioned adsorption section again; A part for the active carbon fallen by chemical substance desorption is taken out, the active carbon taken out moves down formation mobile layer by gravity, in this mobile layer, make active carbon and steam heat while counter current contact, water-based gas reaction occurs, thus makes the regenerating active carbon portion of regenerating active carbon; By the cooling end of the active carbon cooling after regeneration; Cooled active carbon is discharged, is again supplied to the active carbon discharge portion of above-mentioned adsorption section.
This description comprises as the content described in the description of No. 2008-320180, the Japanese patent application of the basis for priority of the application and accompanying drawing.
Invention effect
Compose according to active carbon according to the present invention and live renovation process and compose regenerating furnace of living, by forming the mobile layer moved down by gravity of active carbon, can the mixing of inhibit activities charcoal, realize continuous print active carbon and compose regeneration of living.In addition, by adopting the mobile layer moved down by gravity, the loading of active carbon can be improved, thus the densification composing regenerating furnace alive can be realized.And active carbon pore structure is flourishing, thus just can carry out equably composing regeneration of living with 100% a small amount of water vapour.Therefore, compose to assembling in the circulating continuous gas purifier of active carbon regenerating furnace of living and become easy.In addition, active carbon of the present invention composes the spheric active carbon of regenerating furnace advantageous applications good fluidity of living.
In addition, according to method for gas purification of the present invention and purifier, can inhibit activities charcoal adsorption capacity reduce, by the removal rate long term maintenance of the chemical substance in Exhaust Gas in higher value.And, just can active carbon be made continuously to compose regeneration of living in the operation at gas cleaning plant when not needing to take out from device the active carbon that adsorption capacity reduces.
Accompanying drawing explanation
Fig. 1 is the figure of a kind of embodiment of the tower body shown in gas cleaning plant of the present invention.
Fig. 2 is the figure that the active carbon in display gas cleaning plant of the present invention composes a kind of embodiment of regenerating furnace of living.
Description of reference numerals
A adsorption section
B gas blocking portion
C desorption portion
D gas blocking portion
G waste gas
Ga not concretive gas
Gb transmits gas
K active carbon
H steam
1 tower body
11 gas delivery tube
12 porous plates
13 vertical streams
14 shell and tube exchangers
15 condensers
2 active carbons compose regenerating furnace of living
21 active carbon supply units
21a opening
22 regenerating active carbon portions
23 steam supply units
23a opening
23b funnel-form dividing plate
24 gas discharge sections
24a opening
24b funnel-form dividing plate
25 heating parts
25a heating part
25d heating part
26 cooling ends
27 active carbon discharge portions
28 active carbon translational speed adjusting devices
Detailed description of the invention
Below, the present invention is explained based on embodiment.
Fig. 1 and Fig. 2 shows a kind of embodiment of gas cleaning plant of the present invention.This gas cleaning plant is roughly composed reproducing unit of living (active carbon shown in Fig. 2 composes regenerating furnace 2 of living) by the tower body 1 (Fig. 1) of waste gas purification and active carbon and is formed, the tower body 1 of described waste gas purification by the chemical substance made in charcoal absorption waste gas adsorption section A, gas blocking portion B, active carbon is contacted with not concretive gas thus the desorption portion C of chemical substance desorption and gas blocking portion D is formed, described active carbon composes the part taking-up that reproducing unit of living is used for the active carbon fallen by chemical substance desorption, make it contact with steam, thus make regenerating active carbon.
At the center of tower body 1, by arranging gas delivery tube 11, utilizing transmission gas Gb to be transmitted from the adsorption section A of the lower to upper part of tower body 1 by active carbon K, thus defining the circulation of active carbon K.
This gas delivery tube 11 is not must be configured in tower body 1.
Adsorption section A possesses the porous plate 12 of multistage, and active carbon K forms the fluidized bed of high 15 ~ 20mm on porous plate 12, flows while move, fall to next section at each section.The waste gas G comprising the chemical substances such as solvent composition is admitted in tower body 1 from the below of adsorption section A, with the active carbon K uniform contact flowed while rise in tower body 1.During this, the chemical substance comprised in waste gas G is adsorbed by active carbon K, and after purification, waste gas G is discharged into air from the top of tower body 1.
As such active carbon K, can use that various active carbon, particularly particle diameter are smaller, sphericity and the high spheric active carbon particle of hardness because mobility is excellent and adsorption rate is large, therefore preferably use.In addition, to the particle diameter of active carbon and bulk density without particular limitation of, as preferred scope, nominal mesh 1000 μm of residue on sieves of standard screen (JISZ8801) can be used to be less than 5 % by weight and nominal mesh 600 μm of sievings be less than 5 % by weight, bulk density (new charcoal, i.e. untapped active carbon) is the active carbon of 0.55 ~ 0.61g/ml.As preference, the spheric active carbon " G-BAC " of Network レ Ha society of Co., Ltd. can be enumerated.
The active carbon K having adsorbed chemical substance is admitted to the vertical stream 13 of display air seal effect, and then, the desorption portion C of lower portion moves.Desorption portion C is such as made up of shell and tube exchanger 14, and such active carbon K moves down in pipe, and this active carbon K is heated indirectly from shell-side by steam H.The active carbon K moved down and the not concretive gas Ga counter current contact be admitted to by the bottom of desorption portion C, thus make adsorbed chemical substance desorption.Here, not concretive gas refer to 0 DEG C, be the material of gas under 1 atmospheric pressure, nitrogen, oxygen, hydrogen chloride, air etc. can be enumerated for example.
Discharging from desorption portion C with the not concretive gas Ga of the chemical substance of desorption and be admitted to condenser 15, here chemical substance is cooled liquefies and is recovered.In addition, the not concretive gas Ga that chemical substance has been recovered away uses at system Inner eycle again.
The active carbon K that chemical substance desorption has fallen transmits to the top of tower body 1 via the gas delivery tube 11 playing active carbon circulation portions function is interior by transmitting gas Gb, then is fed into adsorption section A.
Known as mentioned above, by from desorption portion C through and desorption solvent composition, active carbon K regenerate, if but device use continuously for a long time, then the part generation heaviness of chemical substance, in the pore being accumulated in active carbon K in grade.Therefore in the present invention, the part of the active carbon K fallen by chemical substance desorption is fetched into outside system, and the active carbon that the formation active carbon be transplanted on as shown in Figure 2 composes reproducing unit of living is composed in regenerating furnace 2 alive.
As shown in Figure 2, the active carbon K that the adsorption capacity of taking out from tower body 1 reduces is fed into active carbon from active carbon supply unit 21 and composes in regenerating furnace 2 alive.This active carbon supply unit 21 defines the opening 21a that can connect the such as device such as hopper, screw feeder.
The regenerating active carbon portion 22 lived in regenerating furnace 2 is composed at active carbon, the active carbon K supplied from the top of stove forms the mobile layer moved down by gravity, on the other hand, supply by steam supply unit 23 the steam V that essence is 100%, make itself and the active carbon K counter current contact moved down by gravity.In regenerating active carbon portion 22, it is important for forming the mobile layer that the mix particles of the moving direction of active carbon K does not occur as far as possible.If the mixing of active carbon is violent, then active carbon tax regeneration alive is uneven, therefore not preferred.
Compose the hydrogen that generates in live the steam V of regenerating furnace 2 and the water-based gas reaction of active carbon K and the gas such as carbon monoxide and/or unreacted steam is discharged to outside stove via gas discharge section 24 being fed into active carbon.Gas discharge section 24, such as shown in Fig. 2, is made up of the opening 24a being arranged at furnace wall and the funnel-form dividing plate 24b of the inside being configured in stove.
Active carbon supply unit 21 and gas discharge section 24 preferably together be arranged on stove near top.Active carbon supply unit 21 is preferably configured in the top of gas discharge section 24, utilizes the active carbon being filled in the upper and lower of funnel-form dividing plate 24b to carry out air seal, thus stops Exhaust Gas to flow into active carbon supply unit 21.Exhaust Gas is discharged to outside stove via opening 24a by the surface of active carbon of surrounding of the bottom being deposited in funnel-form dividing plate 24b.
As steam supply unit 23, the structure same with above-mentioned gas discharge portion 24 can be adopted.Such as shown in Fig. 2, can be made up of with the funnel-form dividing plate 23b being configured in furnace interior the opening 23a being arranged on furnace wall.The essence supplied by opening 23a be 100% steam V flow into regenerating active carbon portion 22 from the surface of the active carbon layer of the surrounding of the bottom of funnel-form dividing plate 23b, rise in the mobile layer of active carbon.
Active carbon is composed regenerating furnace 2 of living and is provided with heating part 25, active carbon K and steam V is heated to the high-temperature of such as 600 ~ 900 DEG C.Thus, the heavy compound etc. be accumulated in active carbon K is reacted with steam, converts carbon monoxide and hydrogen to, active carbon K almost holomorphosis by water-based gas reaction.Wherein, active carbon self also reacts and loses a part together with heavy compound, but its amount is about 1 % by weight relative to handled active carbon.
As heating part 25, can illustrate resistance heater be configured at furnace wall external-heat heating part, to be made the heating part of active carbon self-heating by eddy-current heating, made by eddy-current heating to be configured at the electric conductor heatings such as the metal in stove thus the heating part etc. of heat activated charcoal and steam indirectly.By sending into 100% water vapour and utilizing the mode of heating not relying on gas with the state heat activated charcoal of mobile layer, the linear gas velocity (flow velocity) in regenerating active carbon portion 22 can be reduced, thus can mobile layer be formed, if linear gas velocity is large, active carbon flows, and is difficult to form stable mobile layer.
Heating part 25 also can be set in the uniform temperature of whole mobile layer, but in mobile layer, preferably form the thermograde risen along gravity direction (moving direction of active carbon K) temperature.Therefore, the heating part 25a of the upper side of stove can be set as lower temperature (such as 600 DEG C), the heating part 25d of lower side be set as relatively high temperature (such as 900 DEG C).Thermograde can be the discontinuous gradient that changes of temperature stage ground, also can be the gradient changed continuously.In addition, preferably the maximum temperature difference of thermograde is controlled more than 200 DEG C.
Formation temperature gradient in mobile layer as described above, the heat exchange moving down the active carbon K of movement and the steam V of rising can be carried out, realize effective utilization of heat, active carbon K can be made slowly to heat up simultaneously, avoid water-based gas reaction sharply, gently carry out the tax regeneration alive of active carbon K.
Composing at active carbon lives in regenerating furnace 2, the flow W of the steam V of counter current contact
v(kg/h) with the flow W of active carbon K
k(kg/h) weight ratio (W
v/ W
k) be preferably 0.05 ~ 1.0.If be less than 0.05, then sometimes fully can not there is the regeneration rate reduction of water-based gas reaction, active carbon; If be greater than 1.0 on the contrary, then the steam rate of climb in stove becomes large, has the tendency being difficult to form stable mobile layer.In addition, if the flow of steam is certain, then need to increase the cross-sectional area of stove to reduce the rate of climb, setting area becomes large and industrial utility value reduces, therefore not preferred.
Active carbon K after the regeneration portion 26 that is cooled cools, and the bottom of composing regenerating furnace 2 of living from active carbon is fetched to stove via active carbon discharge portion 27, is again supplied to the adsorption section A of tower body 1.Active carbon discharge portion 27 has the active carbon K after composing regeneration of living is discharged to function outside stove, such as, be made up of the opening etc. being arranged on bottom.
The translational speed that moves down of active carbon K regulates preferably by active carbon translational speed adjusting device 28, thus controls the treating capacity (active carbon composes the holdup time of living in regenerating furnace) of active carbon.As active carbon translational speed adjusting device 28, the screw bulk material transfer device, air-flow conveying type bulk material conveyer etc. that are connected with above-mentioned active carbon discharge portion 27 can be illustrated.In addition, also can by arranging in the midway of mobile layer the translational speed that the movement restriction devices such as throttle orifice regulate active carbon K.
Composing at active carbon lives in regenerating furnace 2, preferably make the holdup time of the active carbon K in maximum temperature territory (maximum temperature ~ lower than the temperature of maximum temperature 50 DEG C) be that the scope of 0.5 ~ 4 hour is such, set active carbon and compose live the device size of regenerating furnace 2 and the formation etc. of heating part 25.
About flow (W1) and the ratio (composing work regeneration rate: W2/W1) being fetched to active carbon and composing the flow (W2) of the active carbon K of regenerating furnace 2 of living of the active carbon K passed through from desorption portion C in tower body 1, consider that the adsorption capacity of active carbon reduces degree, containing the chemical substance concentration etc. in the waste gas of chemical substance, is preferably set to the value making the removal rate of chemical substance maintain the scope of more than certain value.If compose live regeneration rate little, then can not inhibit activities charcoal adsorption capacity reduce, and the removal rate of chemical substance reduce, therefore not preferred.In addition, if compose regeneration rate alive to become large, then active carbon composes the consumption increase of the water-based gas reaction of active carbon in regenerating furnace 2 of living.The coupling part of composing regenerating furnace 2 of living at tower body 1 and active carbon is arranged for controlling withdrawal amount to make the control part of the flow-rate ratio of active carbon in proper range (not shown).Control part is such as made up of screw feeder and/or air-flow conveying type bulk material transfer device etc.
In addition, this active carbon is composed regenerating furnace 2 of living and is preferably configured in casing, makes to be kept above atmospheric high pressure in this casing, thus prevent imflammable gas from invading with pure air and/or inert gas.In addition, the inlet/outlet that active carbon composes the active carbon K lived on regenerating furnace 2 prevents air to be mixed into preferably by nitrogen-sealed etc., in order to safety, can be arranged on when nitrogen gas supply pressure reduces and automatically stop active carbon composing the device of regenerating furnace alive.
By gas cleaning plant as above, chemical substance contained in the gas discharged by factory etc. can be removed efficiently, such as toluene, dimethylbenzene, MEK (butanone), phenol, naphthalene, IPA (isopropyl alcohol) and odorant such as other VOCs (VOC) composition and/or fertilizer etc., the gas that purification is discharged.
In the embodiment of figure 1, show adsorption section and desorption portion and be arranged on example in 1 tower body, but adsorption section and desorption portion also can be formed as different tower bodies.As an example, there is following formation: using adsorption section and desorption portion as different tower bodies, they linked with gas delivery tube, to circulate active carbon in the mode of adsorption section-desorption portion-adsorption section.
Embodiment
Then, the present invention is described in detail by embodiment and comparative example.
(embodiment 1 ~ 4)
Use possess as depicted in figs. 1 and 2 there is the gas cleaning plant that adsorption section, the tower body of desorption portion and active carbon compose regenerating furnace of living, purification is containing the various waste gas of toluene equal solvent composition.As active carbon, use the spheric active carbon G-BAC of Co., Ltd. Network レ Ha.Composing at active carbon lives in regenerating furnace, regulate active carbon to compose live the device size of regenerating furnace and the setting of heating part, make the holdup time of the active carbon in maximum temperature territory (maximum temperature ~ lower than the temperature of maximum temperature 50 DEG C) be the scope of 0.5 ~ 4 hour.In addition, active carbon is composed the weight ratio (W of the flow of live steam in regenerating furnace and active carbon
v/ W
k) be set as 0.1.
Composing regeneration rate of living is set as shown in table 1.In addition, as shown in the epimere running temperature ~ hypomere running temperature in table 1, in the mobile layer formed in regenerating active carbon portion, the thermograde risen along gravity direction is made to be maximumly differ from 250 DEG C.
Experimental result is as shown in table 1, embodiment 1 ~ 4 any one in, at the duration of work of 6 months, the removal rate of chemical substance was all stabilized in the high value of 85 ~ 99%.
Table 1
(note: PGMEA: propylene glycol methyl ether acetate; PGME: propylene glycol monomethyl ether)
(comparative example 1)
In above-described embodiment 1, gas cleaning plant work, after 6 months, stops composing to active carbon regenerating furnace of living and takes out active carbon, carry out purifying exhaust air with the formation of the tower body only with adsorption section and desorption portion.Consequently, the removal rate of toluene slowly reduces from 97%, after 6 months, be reduced to 75%.Distinguish thus, do not combine active carbon of the present invention compose the gas cleaning plant of regenerating furnace of living can not the removal rate of the high-caliber chemical substance of long term maintenance.
(embodiment 5)
After the experiment of comparative example 1 terminates, combined activity charcoal is composed regenerating furnace of living and is made gas cleaning plant work again, under condition similarly to Example 1, process waste gas.
When active carbon compose regenerating furnace of living start working after through 1 day when, sampling active carbon composes the active carbon of entrance and exit of regenerating furnace of living, and measures its toluene adsorbance (equilibrium adsorption capacity in the gas of temperature 30 DEG C, toluene 800ppm).Its result is as follows.With for referencial use, also illustrate not for the value of the untapped active carbon of gas purification.From these results, compose by active carbon of the present invention regenerating furnace of living, the toluene adsorption capacity of active carbon returns to the level similar with untapped active carbon.
Entrance: 0.18g/g
Outlet: 0.37g/g
Do not use: 0.38g/g
(embodiment 6)
After the experiment of above-described embodiment 5 terminates, active carbon is composed the weight ratio (W of the live flow of steam in regenerating furnace and the flow of active carbon
v/ W
k) change to 0.01, in addition, under condition similarly to Example 5, run gas cleaning plant.When after condition change through 1 day, sampling active carbon composes the active carbon of the entrance and exit of regenerating furnace of living, and measures its toluene adsorbance (equilibrium adsorption capacity in the gas of temperature 30 DEG C, toluene 800ppm).Its result is as follows.With for referencial use, also illustrate not for the value of the untapped active carbon of gas purification.Even if at weight ratio (W
v/ W
k) when being set as 0.01, the toluene adsorption capacity of active carbon also can be recovered, but weight/power ratio ratio (W
v/ W
k) be 0.1 situation recovery capability reduce.
Entrance: 0.18g/g
Outlet: 0.20g/g
Do not use: 0.38g/g
(embodiment 7)
After the experiment of embodiment 6 terminates, active carbon is composed the weight ratio (W of the flow of live steam in regenerating furnace and active carbon
v/ W
k) change to 2.0, in addition, under condition similarly to Example 6, run gas cleaning plant.Even if after condition changes, also can carry out active carbon and compose regeneration of living, but the moving down of active carbon having active carbon tax to live in regenerating furnace becomes uneven, the temperature of stove controls the tendency becoming difficulty.
Quote all publications, patent and patent application in this description all directly to include in this description as a reference.
Claims (4)
1. a method for gas purification, the method has following operation: the gas containing chemical substance is contacted with active carbon, thus makes the absorption process of this chemical substance of charcoal absorption; The active carbon having adsorbed chemical substance is contacted with not concretive gas, thus makes the desorption operation of this chemical substance desorption; The active carbon fallen by chemical substance desorption is supplied to the active carbon circulating process of above-mentioned absorption process again; A part for the active carbon fallen by chemical substance desorption is taken out, the active carbon of taking-up is made to move down formation mobile layer by gravity, in this mobile layer, make active carbon and steam be heated to 600 ~ 900 DEG C of counter current contact, there is water-based gas reaction, thus make the regenerating active carbon operation of regenerating active carbon; By the refrigerating work procedure of the active carbon cooling after regeneration; And, cooled active carbon is discharged the active carbon being again supplied to above-mentioned absorption process and discharge operation; Wherein, the flow W of the steam of counter current contact
v(kg/h) with the flow W of active carbon
k(kg/h) weight ratio (W
v/ W
k) be 0.05 ~ 1.0.
2. a gas cleaning plant, this device has: the gas containing chemical substance is contacted with active carbon, thus makes the adsorption section of this chemical substance of charcoal absorption; The active carbon having adsorbed chemical substance is contacted with not concretive gas, thus makes the desorption portion of this chemical substance desorption; The active carbon fallen by chemical substance desorption is supplied to the active carbon circulation portions of above-mentioned adsorption section again; A part for the active carbon fallen by chemical substance desorption is taken out, the active carbon of taking-up is made to move down formation mobile layer by gravity, in this mobile layer, make active carbon and steam be heated to 600 ~ 900 DEG C of counter current contact, there is water-based gas reaction, thus make the regenerating active carbon portion of regenerating active carbon; By the cooling end of the active carbon cooling after regeneration; Cooled active carbon is discharged, is again supplied to the active carbon discharge portion of above-mentioned adsorption section.
3. gas cleaning plant according to claim 2, also has the heating part of the thermograde risen along gravity direction for formation temperature in mobile layer.
4. gas cleaning plant according to claim 2, also possesses for the formation of maximum temperature difference the heating part of the thermograde being more than 200 DEG C.
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| JP2008320180A JP5873615B2 (en) | 2008-12-16 | 2008-12-16 | Activated carbon activation regeneration furnace, and gas purification method and apparatus using the same |
| JP2008-320180 | 2008-12-16 | ||
| CN200980150220XA CN102245293A (en) | 2008-12-16 | 2009-12-01 | Activated carbon regenerative furnace, and gas purification method and apparatus using same |
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| JP (1) | JP5873615B2 (en) |
| CN (2) | CN102245293A (en) |
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| CN112604644A (en) * | 2020-12-14 | 2021-04-06 | 江苏磊金环境工程有限公司 | Thermal desorption regeneration tower equipment for saturated active alumina pellets |
| CN115888642A (en) * | 2022-10-11 | 2023-04-04 | 宜兴市盛东环保设备有限公司 | Electrochemical steam generation equipment for activated carbon regeneration and regeneration method |
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| KR101242689B1 (en) | 2010-09-01 | 2013-03-12 | 주식회사 포스코 | Exhaust sintering gas activated carbon regenerating apparatus and method for controlling this apparatus |
| KR101257401B1 (en) * | 2011-02-24 | 2013-04-23 | 현대제철 주식회사 | Treating apparatus for waste gas in sintering machine and treating method thereof |
| KR101298711B1 (en) * | 2011-09-29 | 2013-08-21 | 현대제철 주식회사 | Treating apparatus for waste gas in sinter machine |
| KR101298710B1 (en) * | 2011-09-29 | 2013-08-21 | 현대제철 주식회사 | Treating apparatus for waste gas in sintering machine |
| TW201233626A (en) * | 2012-04-10 | 2012-08-16 | Jg Environmental Tech Co Ltd | Activation device of spherical activated carbon |
| CN103372421A (en) * | 2012-04-24 | 2013-10-30 | 杰智环境科技股份有限公司 | Activating device for spherical active carbon |
| CN102921396A (en) * | 2012-10-11 | 2013-02-13 | 成都思诚机电设备有限公司 | Environment friendly active carbon regenerative furnace |
| CN104209107B (en) * | 2014-09-09 | 2016-09-28 | 西安西热锅炉环保工程有限公司 | A kind of high-efficiency desulfurization activated coke Analytic Tower and analytic method |
| JP2019064886A (en) * | 2017-10-04 | 2019-04-25 | 株式会社Kri | Method and system for recovering carbon-containing material |
| CN110152637A (en) * | 2018-02-25 | 2019-08-23 | 彭万喜 | The digester regeneration method of microenvironment pollution control |
| CN109908757A (en) * | 2019-04-18 | 2019-06-21 | 国电环境保护研究院有限公司 | A kind of carbon base catalyst regenerating unit and regeneration method |
| KR102107135B1 (en) * | 2019-12-06 | 2020-05-06 | 주식회사 한울엔지니어링 | Integrated PSA System with Water Gas Shift Process and Process |
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Also Published As
| Publication number | Publication date |
|---|---|
| WO2010071018A1 (en) | 2010-06-24 |
| TWI407999B (en) | 2013-09-11 |
| JP2010142697A (en) | 2010-07-01 |
| CN102245293A (en) | 2011-11-16 |
| TW201036692A (en) | 2010-10-16 |
| JP5873615B2 (en) | 2016-03-01 |
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