CN108722114A - Powdered activated coke adsorpting desulfurization device and the method that absorption desulfurization is carried out to flue gas using it - Google Patents
Powdered activated coke adsorpting desulfurization device and the method that absorption desulfurization is carried out to flue gas using it Download PDFInfo
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- CN108722114A CN108722114A CN201810898347.0A CN201810898347A CN108722114A CN 108722114 A CN108722114 A CN 108722114A CN 201810898347 A CN201810898347 A CN 201810898347A CN 108722114 A CN108722114 A CN 108722114A
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- activated coke
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- coke
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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
- B01D53/10—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 with dispersed adsorbents
- B01D53/12—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 with dispersed adsorbents according to the "fluidised technique"
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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
- B01D2257/00—Components to be removed
- B01D2257/30—Sulfur compounds
- B01D2257/302—Sulfur oxides
Abstract
A kind of method that absorption desulfurization is carried out to flue gas the present invention provides powdered activated coke adsorpting desulfurization device and using it.The powdered activated coke adsorpting desulfurization device includes fluidized bed desulfurizing device, and fluidized bed desulfurizing device is provided with smoke inlet, powdered activated coke entrance and desulfurized gas outlet, and powdered activated coke entrance is for adding powdered activated coke.Compared to existing using granulated activated burnt to flue gas progress adsorption treatment, in powdered activated coke adsorpting desulfurization device provided by the present application, using finer and closely woven powdered activated coke as adsorbent, using fluidized bed desulfurizing device as desulfurizer, this utilization ratio for being conducive to greatly improve adsorbent and SO2Removal efficiency, while number of devices is less, and floor space is small, and investment and operating cost are relatively low.
Description
Technical field
The present invention relates to flue gas desulfurization fields, in particular to a kind of powdered activated coke adsorpting desulfurization device and utilization
Its method that absorption desulfurization is carried out to flue gas.
Background technology
By taking coal-burning boiler as an example, coal-burning boiler generally uses flue gas desulfurization device, wherein Gypsum Wet at this stage
Account for 90% or more.Gypsum Wet has many advantages, such as that desulfuration efficiency is high, desulfurizing agent is at low cost, is China SO2Emission reduction is made
Tremendous contribution, but with its large-scale application, also gradually expose some problems：1) water consumption is big, wastewater discharge is big, this
It is very unfavorable to the power plant in water-deficient area, and the disposition of desulfurization wastewater also becomes problem.2) preparation of calcium-based desulfurizing agent needs
A large amount of calcium carbonate is consumed, the excessive exploitation of limestone resource is caused, does great damage to ecological environment；3) by-product desulfurization
The quality of gypsum is relatively low, and the value of secondary use is limited, causes a large amount of desulfurization products to be abandoned, causes secondary pollution.
Activated coke desulfurization technology is one of the mainstream technology of current flue gas Sulphur ressource emission reduction, has Sulphur ressourceization profit
With, water consumption is few, non-wastewater discharge and multi-pollutant joint removing (SOX, VOCs, Hg etc.) the characteristics of.The activity of the existing country
Burnt desulfurization technology is mainly used in steel industry sintering flue gas, the purified treatment of sulfuric acid tail gas, ring collection flue gas, there is no power plant industrial
The report of application.Industrial applications have been put into activated coke adsorption system using moving bed as reactor, but existing main
Problem：
1) the graininess sizing activated coke that the activated coke of commercial Application is a diameter of 5~9mm, preparation process complexity, cost
The price of height, activated coke per ton is up to 3000~8000 yuan, causes moving-bed active coke desulfurization technical operation of high cost.
2) in activated coke adsorbing and removing flue gas during pollutant, since seed activity coke size is larger, gas molecule
It is big to the diffusional resistance inside activated coke particle, cause activated coke utilization rate of inner surface low.
3) use moving bed as reactor, device volume is huge, takes up a large area, equipment investment height.
4) activated coke can cause seed activity is burnt to be crushed, cause activated coke mechanical in mobile bed operating operating process
Loss.
Invention content
It is carried out the main purpose of the present invention is to provide a kind of powdered activated coke adsorpting desulfurization device and using it to flue gas
The method for adsorbing desulfurization is low with the processing cost height and adsorption efficiency that solve the problems, such as existing activated coke desulfurization technique.
To achieve the goals above, according to an aspect of the invention, there is provided a kind of powdered activated coke absorption desulfurization dress
It sets, powdered activated coke adsorpting desulfurization device includes fluidized bed desulfurizing device, and fluidized bed desulfurizing device is provided with smoke inlet, powdery
Activated coke entrance and desulfurized gas outlet, powdered activated coke entrance is for adding powdered activated coke.
Further, powdered activated coke adsorpting desulfurization device further includes waterworks；Fluidized bed desulfurizing device setting atomization
Nozzle, atomizer are provided with water inlet and atomisation outlet, and water inlet is connected by hydraulic pipeline with waterworks, is atomized out
Mouth extends to the inside of fluidized bed desulfurizing device.
Further, along the axial direction of fluidized bed desulfurizing device, powdered activated coke entrance, atomisation outlet and smoke inlet
Height reduce successively.
Further, fluidized bed desulfurizing device includes cylinder, cylinder include from the bottom to top the storage ash bucket for being sequentially communicated setting,
The side wall in direct tube section is arranged in smoke inlet section, undergauge section, extension diameter section and direct tube section, desulfurized gas outlet and powdered activated coke entrance
On, smoke inlet is arranged on the side wall of smoke inlet section, and atomizer is arranged on the side wall of extension diameter section；Preferably, expanding
Section is round table-like, and extension diameter section includes upper table surface and following table, the angle of flare θ that diameter and the round platform stringcourse of following table are formed is 50~
70 °, more preferable θ is 55~60 °；Preferably, the height H of undergauge section is 1~3m, more preferably 2m.
Further, fluidized bed desulfurizing device further includes discharge knockout drum, and discharge knockout drum is arranged at desulfurized gas outlet；
Preferably, discharge knockout drum is selected from trough plate or shutter.
Further, powdered activated coke adsorpting desulfurization device further includes：Bag-type dust collector, bag-type dust collector are provided with
Sweet gas entrance, sweet gas entrance are connected with desulfurized gas outlet by sweet gas transfer pipeline.
Further, powdered activated coke adsorpting desulfurization device further includes：Powdered activated coke feeding mechanism, powdered activated coke supply
Device is answered to be provided with powdered activated coke supply opening, sweet gas entrance is also connected with powdered activated coke supply opening.
Further, powdered activated coke adsorpting desulfurization device further includes pre-dedusting device, and pre-dedusting device is arranged in desulfurization
Letter shoot road；Preferably, pre-dedusting device be mechanical type inertia smoke duster, more preferably trough plate, shutter or
Cyclone separator.
Further, pre-dedusting device and bag-type dust collector are both provided with discharge port；Fluidized bed desulfurizing device is also set up
It further includes cycle material-returning device to have powdered activated coke loop head, powdered activated coke adsorpting desulfurization device, and cycle material-returning device is set
It is equipped with first discharge port and at least one feed inlet, at least one feed inlet is connected with discharge port correspondingly, first row
Material mouth is connected with powdered activated coke loop head；Preferably, cycle material-returning device is selected from mechanical powder material conveying device or gas
Body skewed slot；More preferably embedded scraper transporter, pipeline chain conveyor or screw conveyor.
Further, cycle material-returning device is additionally provided with the second discharge gate, and powdered activated coke adsorpting desulfurization device further includes
Active coke regeneration device, active coke regeneration device are provided with regeneration feed entrance, and regeneration feed entrance is connected with the second discharge gate
It is logical.
Further, powdered activated coke adsorpting desulfurization device further includes the first metering device, and the setting of the first metering device exists
On flow path between powdered activated coke supply opening and sweet gas entrance.
Further, powdered activated coke adsorpting desulfurization device further includes regeneration activity coke feeding mechanism and the second metering dress
It sets, regeneration activity coke feeding mechanism is provided with regeneration activity coke supply opening, regeneration activity coke supply opening and powdered activated coke entrance
It is connected；Second metering device is arranged on the flow path between regeneration activity coke supply opening and powdered activated coke entrance.
On the other hand the application additionally provides a kind of method carrying out absorption desulfurization to flue gas, method is lived using above-mentioned powdery
Property coke adsorpting desulfurization device carries out absorption desulfurization to flue gas, and method includes：Powdered activated coke is fitted into fluidized bed desulfurizing device,
And flue gas is passed through fluidized bed desulfurizing device and carries out desulfurization process, obtain sweet gas.
Further, during desulfurization process, temperature is 100~110 DEG C, and activated coke bed layer pressure is 600~2000Pa；
Preferably, activated coke bed layer pressure is 1500~1800Pa.
Further, during desulfurization process, method further includes being sprayed into fluidized bed desulfurizing device after making water fogging.
Further, fluidized bed desulfurizing device includes cylinder, cylinder include from the bottom to top the storage ash bucket for being sequentially communicated setting,
The side wall in direct tube section is arranged in smoke inlet section, undergauge section, extension diameter section and direct tube section, desulfurized gas outlet and powdered activated coke entrance
On, smoke inlet is arranged on the side wall of smoke inlet section；Residence time of the flue gas in fluidized bed desulfurizing device 20 be 4~
8s, preferably 5~7s, more preferably 6s；Flue gas undergauge section flow velocity be 25~70m/s, preferably 40~60m/s, it is more excellent
It is selected as 50m/s；Flue gas is 3~6m/s, more preferably 4.5m/s in the flow velocity of direct tube section.
Further, the granularity of powdered activated coke is 50~300 μm.
It applies the technical scheme of the present invention, after flue gas enters the fluidized bed desulfurizing device equipped with powdered activated coke, due to gas
The effect of stream, flue gas generates fierce turbulence and mixes with the powdered activated coke as adsorbent, after coming into full contact with, SO2Equal quilts
It fully absorbs.Gas-particle two-phase stream mechanism in this recirculating fluidized bed is conducive to greatly strengthen the mass transfer between gas-particle two-phase, is real
Existing high desulfurization rate provides basic guarantee.In uphill process, a particle part is carried over fluid bed with sweet gas and takes off flue gas
Sulphur device, because dead weight returns in fluidized bed desulfurizing device, this is conducive to further increase fluidized bed desulfurizing device a part
The granule density of middle powdered activated coke bed, while extending the action time of adsorbent.Purified ash-laden gas is from fluid bed
Desulfurizer is discharged.Compared to existing activated coke adsorbent equipment, in powdered activated coke adsorpting desulfurization device provided by the present application,
Using finer and closely woven powdered activated coke as adsorbent, using fluidized bed desulfurizing device as desulfurizer, this is conducive to greatly
Improve the utilization ratio and SO of adsorbent2Removal efficiency, while number of devices is less, and floor space is small, investment and running cost
With relatively low.
Description of the drawings
The accompanying drawings which form a part of this application are used to provide further understanding of the present invention, and of the invention shows
Meaning property embodiment and its explanation are not constituted improper limitations of the present invention for explaining the present invention.In the accompanying drawings：
Fig. 1 shows a kind of preferred powdered activated coke absorption provided according to a preferred embodiment of the present invention
The structural schematic diagram of desulfurizer；And
Fig. 2 shows a kind of preferred fluidized bed desulfurizing devices provided according to a preferred embodiment of the present invention
20 structural schematic diagram.
Wherein, above-mentioned attached drawing includes the following drawings label：
10, powdered activated coke feeding mechanism；101, powdered activated coke supply opening；11, the first metering device；
20, fluidized bed desulfurizing device；201, smoke inlet；202, powdered activated coke entrance；203, desulfurized gas outlet；21,
Atomizer；211, water inlet；22, direct tube section；23, extension diameter section；24, undergauge section；25, smoke inlet section；26, ash bucket is stored up；27,
Discharge knockout drum
30, waterworks；31, delivery pump；40, bag-type dust collector；401, sweet gas entrance；41, air-introduced machine；42, cloth
Bag dust collector locks gas batcher；43, bag filter discharge valve；50, pre-dedusting device；51, pre-duster returning charge lock gas feed
Machine；52, lock gas batcher is arranged outside pre-duster；60, material-returning device is recycled；70, active coke regeneration device；80, regeneration activity is burnt
Feeding mechanism；81, the second metering device.
Specific implementation mode
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.Below in conjunction with embodiment, the present invention will be described in detail.
As described in background technology, there are processing cost height and adsorption efficiencies for existing activated coke desulfurization technique
Low problem.In order to solve the above-mentioned technical problem, this application provides a kind of powdered activated coke adsorpting desulfurization devices, such as Fig. 1 institutes
Show, powdered activated coke adsorpting desulfurization device includes fluidized bed desulfurizing device 20.Fluidized bed desulfurizing device 20 is provided with smoke inlet
201, powdered activated coke entrance 202 and desulfurized gas outlet 203, powdered activated coke entrance 202 is for adding powdered activated coke.
After flue gas enters the fluidized bed desulfurizing device 20 equipped with powdered activated coke, due to the effect of air-flow, flue gas and conduct
The powdered activated coke of adsorbent generates fierce turbulence and mixes, after coming into full contact with, SO2Etc. being fully absorbed.This recycle stream
Change gas-particle two-phase stream mechanism in bed, be conducive to greatly strengthen the mass transfer between gas-particle two-phase, to realize that high desulfurization rate provides root
This guarantee.Flue gas is in uphill process, and a particle part is carried over fluidized bed desulfurizing device 20 with sweet gas, and a part is because certainly
It returns to again in fluidized bed desulfurizing device 20, this is conducive to further increase powdered activated coke bed in fluidized bed desulfurizing device 20
The granule density of layer, while extending the action time of adsorbent.Purified ash-laden gas is discharged from fluidized bed desulfurizing device 20.
Compared to existing activated coke adsorbent equipment, in powdered activated coke adsorpting desulfurization device provided by the present application, with more
The close powdered activated coke of refinement is as adsorbent, and using fluidized bed desulfurizing device 20 as desulfurizer, this is conducive to greatly carry
The utilization ratio and SO of high adsorbent2Removal efficiency, while number of devices is less, and floor space is small, investment and operating cost
It is relatively low.
When carrying out desulfurization process to flue gas using powdered activated coke adsorpting desulfurization device provided by the present application, not only contribute to
It reduces processing cost, save floor occupying area, also advantageously improve desulfuration efficiency.In a preferred embodiment, such as Fig. 1 institutes
Show, powdered activated coke adsorpting desulfurization device further includes waterworks 30；Atomizer 21, atomization is arranged in fluidized bed desulfurizing device 20
Nozzle 21 is provided with water inlet 211 and atomisation outlet, and water inlet 211 is connected with waterworks 30 by hydraulic pipeline, atomization
Outlet extends to the inside of fluidized bed desulfurizing device 20.Waterworks are set and coupled logical atomizer can be by water mist
It is sprayed into fluidized bed desulfurizing device 20 after change, so as to adjust adsorption reaction temperature and the water steaming in fluidized bed desulfurizing device 20
Gas content improves desulfuration efficiency.Preferably, above-mentioned atomizer 21 is double fluid atomization nozzle or high pressure atomizing nozzle.
Preferably, above-mentioned powdered activated coke adsorpting desulfurization device further includes delivery pump 31, which is arranged in water supply
On flow path between device 30 and the water inlet 211 of atomizer 21.
In a preferred embodiment, as shown in Figure 1, along fluidized bed desulfurizing device 20 axial direction, powdery live
The height of property coke entrance 202, atomisation outlet and smoke inlet 201 reduces successively.By powdered activated coke entrance 202, atomisation outlet
And the height of smoke inlet 201 is reduced successively when being arranged, and after flue gas can be made to enter fluidized bed desulfurizing device 20, is first sprayed in atomization
Temperature is reduced under the action of the spraying that mouth 21 is discharged, desulfurization absorption is then carried out by powdered activated coke bed again.It is such to set
At a temperature of being equipped with conducive to sweetening process is adjusted, and then be conducive to further increase desulfuration efficiency.
In above-mentioned powdered activated coke adsorpting desulfurization device provided by the present application, ability may be used in fluidized bed desulfurizing device 20
The common structure in domain, as long as the function of adsorbing desulfurization on fluid bed can be realized.In a preferred embodiment, such as
Shown in Fig. 2, fluidized bed desulfurizing device 20 includes cylinder, which includes being sequentially communicated setting storage ash bucket 26, flue gas from the bottom to top
Entrance 25, undergauge section 24, extension diameter section 23 and direct tube section 22, desulfurized gas outlet 203 and powdered activated coke entrance 202 are arranged straight
On the side wall of cylinder section 22, smoke inlet 201 is arranged on the side wall of smoke inlet section 25, and atomizer 21 is arranged in extension diameter section 23
Side wall on.Compared to smoke inlet section 25, the caliber of undergauge section 24 is smaller, this can promote the flue gas by undergauge section 24
Flow velocity.The outlet of storage ash bucket 26 is connect with the discharge valve of 20 bottom of fluidized bed desulfurizing device, can not be fluidized in tower for discharging
And it is deposited on the activated coke of the larger particles in storage ash bucket 26.
Preferably, extension diameter section 23 is round table-like, and extension diameter section 23 includes upper table surface and following table, the diameter and round platform of following table
Stringcourse formed angle of flare θ be 50~70 °.Above-mentioned angle of flare includes but not limited to above range, and is limited to above-mentioned
The contact area for being conducive to improve flue gas and atomized liquid in range, to be conducive to improve the cooling efficiency of flue gas, simultaneously also
Be conducive to improve the contact area of flue gas and powdered activated coke after cooling, and then be conducive to improve the desulfuration efficiency to flue gas.
It is highly preferred that above-mentioned angle of flare θ is 55~60 °, this is conducive to further increase the desulfuration efficiency to flue gas.Preferably, undergauge
The height H of section 24 is 1~3m, more preferably 2m.
Preferably, atomizer 21 is arranged above the activated coke feed inlet on the cylinder of 1~3m, and the peace of atomizer 21
It is consistent with flow of flue gas direction in tower to fill direction, i.e., sprays water upwards along tower body；The quantity of atomizer 21 can be one or more,
It it is such as one, injection point is located at the center of fluidized bed desulfurizing device 20；Such as it is multiple, tower body of the injection point along absolute altitude where it
Circular cross section is uniformly arranged, and the tower body circular cross section that the circumscribed circular diameter that water spraying atomization is formed should be less than the absolute altitude is straight
Diameter, this is conducive to the contact area for improving spraying and flue gas, and then improves its rate of temperature fall to flue gas.
In a preferred embodiment, as shown in Fig. 2, fluidized bed desulfurizing device 20 further includes discharge knockout drum 27,
Discharge knockout drum 27 is arranged on desulfurized gas outlet 203.Due to some powdered activated coke in sweetening process with desulfurization cigarette
Gas is discharged, and discharge knockout drum 27 is arranged in desulfurized gas outlet 203, can tentatively be divided the powdered activated coke in desulfurization fume
From, and then the concentration for the powdered activated coke that can be lowered into subsequent dust-extraction unit.Preferably, discharge knockout drum 27 is selected from
Trough plate or shutter.
In a preferred embodiment, as shown in Figure 1, powdered activated coke adsorpting desulfurization device further includes bag-type dust
Device 40.Bag-type dust collector 40 is provided with sweet gas entrance 401, and sweet gas entrance 401 is connected with desulfurized gas outlet 203.
Bag-type dust collector 40, which is arranged, to detach the gas-particle two-phase in desulfurization fume, and then reduces the powdery in desulfurization fume
The content of activated coke.As shown in Figure 1, above-mentioned powdered activated coke adsorpting desulfurization device further includes air-introduced machine 41, for accelerating cloth bag
The mass rate of emission of desulfurization fume in dust-extraction unit 40.
In a preferred embodiment, as shown in Figure 1, powdered activated coke adsorpting desulfurization device further includes powdered activated
Burnt feeding mechanism 10, powdered activated coke feeding mechanism are provided with powdered activated coke supply opening 101, and sweet gas entrance 401 is gone back and powder
Shape activated coke supply opening 101 is connected.Sweet gas entrance 401 is also connected with powdered activated coke supply opening 101 can be to cloth bag
Dust-extraction unit 40 adds fresh activated coke, and the member of the sulphur in desulfurization fume can be further decreased using its higher absorption property
Element.
In order to further increase the removal efficiency to the activated coke in desulfurization fume, it is preferable that as shown in Figure 1, powdery is lived
Property coke adsorpting desulfurization device further include pre-dedusting device 50, pre-dedusting device 50 setting go out with sweet gas in sweet gas entrance 401
On sweet gas transfer pipeline between mouth 203.Preferably, pre-dedusting device 50 is mechanical type inertia smoke duster, more preferably
For trough plate, shutter or cyclone separator.Be conducive to further increase its desulfurization effect using above-mentioned pre-dedusting device 50.
In a preferred embodiment, as shown in Figure 1, pre-dedusting device 50 and bag-type dust collector 40 are both provided with
Discharge port；Fluidized bed desulfurizing device 20 is additionally provided with powdered activated coke loop head, and powdered activated coke adsorpting desulfurization device also wraps
Cycle material-returning device 60 is included, cycle material-returning device 60 is provided with first discharge port and at least one feed inlet, at least one charging
Mouth is connected with above-mentioned discharge port correspondingly, and first discharge port is connected with powdered activated coke loop head.
The discharging of the discharge port and bag-type dust collector 40 of the feed inlet and pre-dedusting device 50 of material-returning device 60 will be recycled
Mouth is connected, and the solid particle (powdered activated carbon) trapped through pre-dedusting device 50 and bag-type dust collector 40 can be made to pass through
Material-returning device 60 is recycled, returns and continues to participate in reaction in fluidized bed desulfurizing device 20, so recycle.At bag-type dust collector 40
The directly outer row of flue gas after reason.
Preferably, cycle material-returning device 60 is selected from mechanical powder material conveying device or gas skewed slot, more preferably buries scraper plate
Conveyer, pipeline chain conveyor or screw conveyor.
In a preferred embodiment, as shown in Figure 1, cycle material-returning device 60 is additionally provided with the second discharge gate, powder
Shape activated coke adsorpting desulfurization device further includes active coke regeneration device 70, and active coke regeneration device 70 is provided with regeneration feed and enters
Mouthful, regeneration feed entrance is connected with the second discharge gate.Be arranged active coke regeneration device 70 can will from cycle material-returning device 60
The powdered activated coke of middle discharge is regenerated, and then is reused.
Preferably, as shown in Figure 1, as shown in Figure 1, above-mentioned powdered activated coke adsorpting desulfurization device further includes bag filter
Gas batcher 42 is locked, bag filter lock gas batcher 42 and the discharge port of 40 bottom of bag-type dust collector pass through the first discharge duct
Road is connected, and the bag filter discharge valve 43 on the first discharge pipelines.Gas batcher 42 is locked by cloth by bag filter
Powdered activated coke in bag dust-extraction unit 40 drains into cycle material-returning device 60.
Preferably, as shown in Figure 1, above-mentioned powdered activated coke adsorpting desulfurization device further includes pre-duster returning charge lock gas feed
Lock gas batcher 52 is arranged outside machine 51 and pre-duster, pre-duster returning charge lock gas batcher 51 is unloaded with 50 bottom of pre-dedusting device
Material mouth is connected by the second discharge pipelines, and the discharge port of lock gas batcher 52 and 50 bottom of pre-dedusting device is arranged outside pre-duster
It is connected by third discharge pipelines.
In order to preferably control the inlet amount of powdered activated coke, in a preferred embodiment, powdered activated coke is inhaled
Attached desulfurizer further includes the first metering device 11, and the first metering device 11 is arranged in powdered activated coke supply opening 101 and desulfurization
On flow path between gas entrance 401.
In order to further increase the utilization rate of powdered activated coke, in a preferred embodiment, powdered activated coke is inhaled
Attached desulfurizer further includes regeneration activity coke feeding mechanism 80 and the second metering device 81, and regeneration activity coke feeding mechanism 80 is arranged
There are regeneration activity coke supply opening, regeneration activity coke supply opening to be connected with powdered activated coke entrance 202；Second metering device 81 is set
It sets on the flow path between regeneration activity coke supply opening and powdered activated coke entrance 202.
SO2The control of concentration of emission：According to the SO at the smoke inlet of fluidized bed desulfurizing device 202Concentration, pass through control
The output of first metering device 11 and the second metering device 81 delivers into the unadsorbed work of fluidized bed desulfurizing device 20 with control
Property coke amount；Meanwhile the SO exported according to bag-type dust collector 402Concentration is used as checking the first metering device 11 and second
The regulation and control parameter of metering device 81, to ensure to reach pollutant emission requirement.
The pressure drop of fluidized bed desulfurizing device 20 controls：The pressure drop of fluidized bed desulfurizing device 20 is by flue gas pressure drop and solid particle
Pressure drop two parts form.Gas batcher 51 is locked by pre-duster returning charge, bag filter locks gas batcher 42 and cycle returning charge
60 adjusting control of device sends the recycling activated coke amount of fluidized bed desulfurizing device 20 back to, it is ensured that the stabilization of its pressure drop, to protect
The concentration of solid particles needed for reaction in bed is demonstrate,proved.
The another aspect of the application additionally provides a kind of method carrying out absorption desulfurization to flue gas using powdered activated coke, should
Method carries out absorption desulfurization using above-mentioned powdered activated coke adsorpting desulfurization device to flue gas, and specifically, this method includes：By powdery
Activated coke is fitted into fluidized bed desulfurizing device 20, and flue gas is passed through fluidized bed desulfurizing device 20 and carries out desulfurization process, is taken off
Sulphur gas.
After flue gas enters fluidized bed desulfurizing device 20, due to the effect of air-flow, flue gas with as the powdered activated of adsorbent
Coke generates fierce turbulence and mixes, after coming into full contact with, SO2Etc. being fully absorbed.Dual-Phrase Distribution of Gas olid in this recirculating fluidized bed
Mechanism is conducive to greatly strengthen the mass transfer between gas-particle two-phase, to realize that high desulfurization rate provides basic guarantee.Flue gas is upper
During rising, a particle part is carried over fluidized bed desulfurizing device 20 with sweet gas, and a part returns to fluid bed because of dead weight
In desulfurizer 20, this is conducive to the granule density for further increasing powdered activated coke bed in fluidized bed desulfurizing device 20, together
When extend adsorbent action time.Purified ash-laden gas is discharged from fluidized bed desulfurizing device 20.Compared to existing work
Property coke adsorbent equipment, in powdered activated coke adsorpting desulfurization device provided by the present application, using finer and closely woven powdered activated coke as
Adsorbent, using fluidized bed desulfurizing device 20 as desulfurizer, this utilization ratio for being conducive to greatly improve adsorbent and SO2
Removal efficiency, while number of devices is less, and floor space is small, and investment and operating cost are relatively low.
The service efficiency that processing is conducive to improve adsorbent is carried out to sulfur-containing smoke gas using the above method, improves sulfur dioxide
Removal efficiency, while reducing processing cost.In a preferred embodiment, during desulfurization process, temperature be 100~
110 DEG C, activated coke bed layer pressure is 600~2000Pa.Temperature and activated coke bed layer pressure during desulfurization process include but
It is not limited to above range, and is limited and is conducive to further increase desulfurization effect within the above range, and in above-mentioned temperature model
When enclosing progress desulfurization, whole HCl, HF and SO can be almost removed3, while flue-gas temperature whole process is all higher than dew point, therefore energy
Enough reduce the risk that equipment is corroded.In order to further increase desulfurization effect, it is highly preferred that activated coke bed layer pressure be 1500~
1800Pa。
In a preferred embodiment, during desulfurization process, the above method further includes being sprayed into after making water fogging
In fluidized bed desulfurizing device 20.It is sprayed into fluidized bed desulfurizing device 20 after making water fogging, fluid-bed sweetening dress can be lowered into
The temperature for setting the flue gas in 20 keeps the temperature of flue gas more uniform, while can be by fluid bed according to the straying quatity of atomized drop
Temperature in desulfurizer 20 controls in required range.
In a preferred embodiment, fluidized bed desulfurizing device 20 include cylinder, the cylinder include from the bottom to top according to
Secondary connection setting storage ash bucket 26, smoke inlet section 25, undergauge section 24, extension diameter section 23 and direct tube section 22, desulfurized gas outlet 203 and powder
Shape activated coke entrance 202 is arranged on the side wall of direct tube section 22, and smoke inlet 201 is arranged on the side wall of smoke inlet section 25；
In sweetening process, residence time of the flue gas in fluidized bed desulfurizing device 20 is 4~8s.The residence time of flue gas includes but unlimited
In in above range, and is limited and be conducive to further increase powdered activated coke within the above range the desulfurization of flue gas is imitated
Fruit.On the basis of ensureing desulfurization effect and treatment effeciency, it is highly preferred that 5~7s of residence time of flue gas, further preferably
6s。
Flue gas is 25~70m/s in the flow velocity of undergauge section 24.Speed by flue gas in undergauge section 24 is limited to above range
Inside be conducive to further increase the less turbulence between flue gas and powdered activated coke, and then improve the mass transfer effect between gas-particle two-phase
Rate, and then improve desulfuration efficiency.In order to further increase desulfuration efficiency, it is preferable that flue gas undergauge section 24 flow velocity be 40~
60m/s, more preferably 50m/s.
Flue gas is 3~6m/s in the flow velocity of direct tube section 22.By flue gas direct tube section 22 drift limit within the above range
Advantageously reduce the concentration of powdered activated coke in desulfurization fume.In order to further decrease the dense of powdered activated coke in desulfurization fume
Degree, more preferably 4.5m/s.
Flue gas flow rate in fluidized bed desulfurizing device 20 is limited within the above range so that Dual-Phrase Distribution of Gas olid is in fluid bed
Slip velocity in desulfurizer 20 is maximum, and reaction zone bed density is high, gas-solid contact of the flue gas in fluidized bed desulfurizing device 20
Time is up to 5 seconds or more, has longest contact especially between adsorbent (powdered activated coke) and recycle stock and flue gas
Stroke so that the gas-solid mixing, mass transfer in adsorption tower are more abundant, optimize adsorption effect, to further reach higher
Removal efficiency.
The service efficiency that processing is conducive to improve adsorbent is carried out to sulfur-containing smoke gas using the above method, improves sulfur dioxide
Removal efficiency, while reducing processing cost.In a preferred embodiment, the granularity of powdered activated coke is 50~300 μ
m.The granularity of powdered activated coke includes but not limited to above range, and is limited and be conducive to further increase within the above range
Its desulfuration efficiency to flue gas.
The application is described in further detail below in conjunction with specific embodiment, these embodiments should not be understood as limitation originally
Apply for range claimed.
In embodiment 1 to 8 and comparative example 1, the composition of sulfur-containing smoke gas includes：N278% (dry), CO215% (dry), O2
6.55% (dry), SO20.05% (dry), impurity 0.4% (dry) and H2O 7.73% (wet).
Embodiment 1
Absorption desulfurization process is carried out to sulfur-containing smoke gas using powdered activated coke adsorpting desulfurization device shown in Fig. 1 and 2, wherein flowing
The angle of flare of fluidized bed desulfurizing device 20 is 60 DEG C, and the length of undergauge section 24 is 2m, and the granularity of powdered activated coke is 100 μm.
Processing procedure is as follows：Above-mentioned sulfur-containing smoke gas is passed through fluidized bed desulfurizing device 20 and carries out absorption desulfurization, obtains desulfurization
Flue gas, the wherein temperature in sweetening process are 105 DEG C, and activated coke bed layer pressure is 1600Pa, flow velocity of the flue gas in undergauge section 24
Flow velocity for 50m/s, direct tube section 22 is 4.5m/s, and residence time of the flue gas in fluidized bed desulfurizing device 20 is 6s.
After processing, the desulfurization degree of sulfur-containing smoke gas is 99.3%.
Embodiment 2
With being distinguished as embodiment 1：In sweetening process, the temperature in fluidized bed desulfurizing device is 80 DEG C, activated coke bed
Pressure is 2500Pa.The desulfurization degree of sulfur-containing smoke gas is 98.9%.
Embodiment 3
With being distinguished as embodiment 1：In sweetening process, the temperature in fluidized bed desulfurizing device is 105 DEG C, activated coke bed
Pressure is 1200Pa.The desulfurization degree of sulfur-containing smoke gas is 97.8%.
Embodiment 4
With being distinguished as embodiment 1：Residence time of the flue gas in fluidized bed desulfurizing device 20 is 4s.Sulfur-containing smoke gas takes off
Sulphur rate is 98.5%.
Embodiment 5
With being distinguished as embodiment 1：Residence time of the flue gas in fluidized bed desulfurizing device 20 is 3s.Sulfur-containing smoke gas takes off
Sulphur rate is 97%.
Embodiment 6
With being distinguished as embodiment 1：Flue gas is 30m/s in the flow velocity of undergauge section 24, is 6m/s in the flow velocity of direct tube section 22.
The desulfurization degree of sulfur-containing smoke gas is 91%.
Embodiment 7
With being distinguished as embodiment 1：Flue gas is 15m/s in the flow velocity of undergauge section 24, is 7m/s in the flow velocity of direct tube section 22.
The desulfurization degree of sulfur-containing smoke gas is 87%.
Embodiment 8
With being distinguished as embodiment 1：The granularity of powdered activated coke is 500 μm.The desulfurization degree of sulfur-containing smoke gas is 86%.
Comparative example 1
With being distinguished as embodiment 1：The fixed bed using graininess sizing activated coke as the adsorbent of 5~9mm is used to inhale
Adsorption device is as desulfurizer.The desulfurization degree of sulfur-containing smoke gas is 85%.
It can be seen from the above description that the above embodiments of the present invention realize following technique effect：
Comparing embodiment 1 to 7 and comparative example 1 are it is found that using powdered activated coke adsorpting desulfurization device pair provided by the present application
When sulfur-containing smoke gas carries out absorption desulfurization, be conducive to the desulfurization degree for improving sulfur-containing smoke gas.
Comparing embodiment 1 to 3 is it is found that by the temperature and activated coke bed layer pressure in fluidized bed desulfurizing device in sweetening process
It is limited in the preferred range of the application, is conducive to the desulfurization degree for improving sulfur-containing smoke gas.
Comparing embodiment 1 and 4 is it is found that residence time of the flue gas in fluidized bed desulfurizing device is limited to the application is preferred
In the range of when, be conducive to improve sulfur-containing smoke gas desulfurization degree.
Comparing embodiment 1,6,7 is it is found that by flue gas in the drift limit of undergauge section and direct tube section in the preferred model of the application
When enclosing interior, be conducive to the desulfurization degree for improving sulfur-containing smoke gas.
Comparing embodiment 1 and 8 is it is found that when the granularity of powdered activated coke is limited in the preferred range of the application, favorably
In the desulfurization degree for improving sulfur-containing smoke gas.
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, any made by repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (17)
1. a kind of powdered activated coke adsorpting desulfurization device, which is characterized in that the powdered activated coke adsorpting desulfurization device includes：
Fluidized bed desulfurizing device (20), the fluidized bed desulfurizing device (20) is provided with smoke inlet (201), powdered activated coke enters
Mouth (202) and desulfurized gas outlet (203), the powdered activated coke entrance (202) is for adding powdered activated coke.
2. powdered activated coke adsorpting desulfurization device according to claim 1, which is characterized in that the powdered activated coke absorption
Desulfurizer further includes waterworks (30)；
Fluidized bed desulfurizing device (20) the setting atomizer (21), the atomizer (21) are provided with water inlet (211)
And atomisation outlet, the water inlet (211) are connected with the waterworks (30) by hydraulic pipeline, the atomisation outlet prolongs
Extend to the inside of the fluidized bed desulfurizing device (20).
3. powdered activated coke adsorpting desulfurization device according to claim 2, which is characterized in that filled along the fluid-bed sweetening
Set the axial direction of (20), the powdered activated coke entrance (202), the atomisation outlet and the smoke inlet (201) height
Degree reduces successively.
4. powdered activated coke adsorpting desulfurization device according to claim 3, which is characterized in that the fluidized bed desulfurizing device
(20) include cylinder, the cylinder includes storage ash bucket (26), smoke inlet section (25), the undergauge for being sequentially communicated setting from the bottom to top
Section (24), extension diameter section (23) and direct tube section (22), the desulfurized gas outlet (203) and the powdered activated coke entrance (202) are set
It sets on the side wall of the direct tube section (22), the smoke inlet (201) is arranged on the side wall of the smoke inlet section (25),
The atomizer (21) is arranged on the side wall of the extension diameter section (23)；
Preferably, the extension diameter section (23) is round table-like, and the extension diameter section (23) includes upper table surface and following table, the following table
The angle of flare θ that is formed of diameter and round platform stringcourse be 50~70 °, more preferable θ is 55~60 °；
Preferably, the height H of the undergauge section (24) is 1~3m, more preferably 2m.
5. powdered activated coke adsorpting desulfurization device according to claim 1, which is characterized in that the fluidized bed desulfurizing device
(20) further include discharge knockout drum (27), the discharge knockout drum (27) is arranged at the desulfurized gas outlet (203)；It is preferred that
Ground, the discharge knockout drum (27) are selected from trough plate or shutter.
6. powdered activated coke adsorpting desulfurization device according to any one of claim 1 to 5, which is characterized in that the powder
Shape activated coke adsorpting desulfurization device further includes：Bag-type dust collector (40), the bag-type dust collector (40) are provided with sweet gas
Entrance (401), the sweet gas entrance (401) are connected with the desulfurized gas outlet (203) by sweet gas transfer pipeline.
7. powdered activated coke adsorpting desulfurization device according to claim 6, which is characterized in that the powdered activated coke absorption
Desulfurizer further includes：Powdered activated coke feeding mechanism (10), the powdered activated coke feeding mechanism (10) are provided with powdery work
Property coke supply opening (101), the sweet gas entrance (401) are also connected with the powdered activated coke supply opening (101).
8. powdered activated coke adsorpting desulfurization device according to claim 6, which is characterized in that the powdered activated coke absorption
Desulfurizer further includes pre-dedusting device (50), and the pre-dedusting device (50) is arranged on the sweet gas transfer pipeline；
Preferably, the pre-dedusting device (50) is mechanical type inertia smoke duster, more preferably trough plate, shutter or rotation
Wind separator.
9. powdered activated coke adsorpting desulfurization device according to claim 8, which is characterized in that the pre-dedusting device (50)
It is both provided with discharge port with the bag-type dust collector (40)；The fluidized bed desulfurizing device (20) is additionally provided with powdered activated coke
Loop head, the powdered activated coke adsorpting desulfurization device further include cycle material-returning device (60), the cycle material-returning device
(60) be provided with first discharge port and at least one feed inlet, at least one feed inlet correspondingly with the discharge port
It is connected, the first discharge port is connected with the powdered activated coke loop head；
Preferably, the cycle material-returning device (60) is selected from mechanical powder material conveying device or gas skewed slot；It more preferably buries and scrapes
Plate conveyer, pipeline chain conveyor or screw conveyor.
10. powdered activated coke adsorpting desulfurization device according to claim 9, which is characterized in that the cycle material-returning device
(60) it is additionally provided with the second discharge gate,
The powdered activated coke adsorpting desulfurization device further includes active coke regeneration device (70), the active coke regeneration device (70)
It is provided with regeneration feed entrance, the regeneration feed entrance is connected with second discharge gate.
11. powdered activated coke adsorpting desulfurization device according to claim 7, which is characterized in that the powdered activated coke is inhaled
Attached desulfurizer further includes the first metering device (11), and the first metering device (11) setting is supplied in the powdered activated coke
On flow path between mouth (101) and the sweet gas entrance (401).
12. powdered activated coke adsorpting desulfurization device according to claim 1, which is characterized in that the powdered activated coke is inhaled
Attached desulfurizer further includes：
Regeneration activity coke feeding mechanism (80), the regeneration activity coke feeding mechanism (80) are provided with regeneration activity coke supply opening,
The regeneration activity coke supply opening is connected with the powdered activated coke entrance (202)；
Second metering device (81), second metering device (81) are arranged in the regeneration activity coke supply opening and the powdery
On flow path between activated coke entrance (202).
13. a kind of method carrying out absorption desulfurization to flue gas, which is characterized in that the method, which uses in claim 1 to 12, appoints
Powdered activated coke adsorpting desulfurization device described in one carries out absorption desulfurization to the flue gas, the method includes：
Powdered activated coke is fitted into fluidized bed desulfurizing device (20), and by flue gas be passed through the fluidized bed desulfurizing device (20) into
Row desulfurization process, obtains sweet gas.
14. according to the method for claim 13, which is characterized in that during the desulfurization process, temperature is 100~110
DEG C, activated coke bed layer pressure is 600~2000Pa；Preferably, the activated coke bed layer pressure is 1500~1800Pa.
15. the method according to claim 13 or 14, which is characterized in that during desulfurization process, the method is also wrapped
It includes and is sprayed into after making water fogging into the fluidized bed desulfurizing device (20).
16. the method according to claim 13 or 14, which is characterized in that the fluidized bed desulfurizing device (20) includes cylinder
Body, the cylinder include the storage ash bucket (26) for being sequentially communicated setting from the bottom to top, smoke inlet section (25), undergauge section (24), expand
Diameter section (23) and direct tube section (22), the desulfurized gas outlet (203) and the powdered activated coke entrance (202) setting are described straight
On the side wall of cylinder section (22), the smoke inlet (201) is arranged on the side wall of the smoke inlet section (25)；
Residence time of the flue gas in the fluidized bed desulfurizing device 20 is 4~8s, preferably 5~7s, more preferably 6s；
The flue gas is 25~70m/s, preferably 40~60m/s, more preferably 50m/s in the flow velocity of the undergauge section (24)；
The flue gas is 3~6m/s, more preferably 4.5m/s in the flow velocity of the direct tube section (22).
17. the method according to any one of claim 13 to 16, which is characterized in that the granularity of the powdered activated coke is
50~300 μm.
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| CN201810898347.0A CN108722114A (en) | 2018-08-08 | 2018-08-08 | Powdered activated coke adsorpting desulfurization device and the method that absorption desulfurization is carried out to flue gas using it |
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| CN201810898347.0A CN108722114A (en) | 2018-08-08 | 2018-08-08 | Powdered activated coke adsorpting desulfurization device and the method that absorption desulfurization is carried out to flue gas using it |
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