CN208145768U - A kind of system of powdered activated coke combined desulfurization and denitration - Google Patents
A kind of system of powdered activated coke combined desulfurization and denitration Download PDFInfo
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- CN208145768U CN208145768U CN201820199854.0U CN201820199854U CN208145768U CN 208145768 U CN208145768 U CN 208145768U CN 201820199854 U CN201820199854 U CN 201820199854U CN 208145768 U CN208145768 U CN 208145768U
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Abstract
The utility model discloses the systems of a kind of powdered activated coke combined desulfurization and denitration, the air inlet of fluid-bed sweetening tower is connect with flue gas source, the gas outlet of fluid-bed sweetening tower is connect with the air inlet of the first gas-solid separator, the gas outlet of first gas-solid separator is connect with the air inlet of fluidized bed denitration tower, the gas outlet of fluidized bed denitration tower is connect with the air inlet of the second gas-solid separator, the gas outlet of second gas-solid separator and the air inlet of cloth bag separator connect, the solid outlet of second gas-solid separator is connect with the bottom of fluidized bed denitration tower, the solid outlet of cloth bag separator is connect with the bottom of fluid-bed sweetening tower；Activated coke warehouse is connect with fluidized bed denitration tower, and ammonia-gas spraying device is connect with fluidized bed denitration tower；Ammonia nitrogen oxides under the catalytic action of powder activity coke is reduced into nitrogen；The powder activity coke carried in flue gas after denitration is successively separated by the second gas-solid separator and cloth bag separator, is separately recovered into fluidized bed denitration and fluid-bed sweetening tower and is recycled.
Description
Technical field
The utility model relates to combustion product gases pollutant removing fields, and in particular to a kind of powdered activated coke combined desulfurization and
The system of denitration.
Background technique
Active coke desulphurizing is a kind of flue gas desulfurization technique of resourcebility, while to pollutants such as heavy metals in flue gas
There is apparent cooperation-removal to act on.Active coke desulphurizing technology currently on the market mainly uses moving bed absorption-heating regeneration work
Skill route, moving bed absorbing process use the amorphous pellets activated coke of higher mechanical strength, and shape is generally Φ 5-9mm diameter
Column.Powder activity coke fluidised bed adsorption desulfurization is a kind of novel active coke sulfur removal technology route, and the technique is with Powdered Activated Carbon
For adsorbent, sulfur dioxide is adsorbed in circulating fluid bed reactor and realizes sweetening process.Activated coke as a kind of porous material,
It is a kind of catalyst that can realize the selective catalytic denitrification process at low temperature, but activated coke is to nitric oxide production adsorbing and removing energy
Power is weaker.Currently, activated coke moving bed sulfur removal technology generally by spraying into ammonia after desulfurization, is made using the catalysis of activated coke
With nitrogen oxides being reduced to nitrogen, Shandong University applied for a patent a kind of fluidized activated carbon combined desulfurization and denitrification in 2010
Technique (201010189427.2) realizes powdered activated coke fluidized-bed process by spraying into ammonia on fluid-bed sweetening tower top
Combined desulfurization and denitration.Since activated coke is poor to nitrogen oxide absorbent ability, sulfur dioxide and nitrogen oxides are in activated coke table
The competitive Adsorption in face can inhibit nitrogen oxides in the absorption on activated coke surface, when sulfur dioxide and nitrogen oxides exist simultaneously,
It can Preferential adsorption sulfur dioxide.The ability for having adsorbed the activated coke catalysis ammonia nitrogen oxides reduction of sulfur dioxide substantially weakens,
Meanwhile ammonia can react generation ammonium sulfate with the activated coke for having adsorbed sulfur dioxide and cause the blocking in activated coke gap, and cause
The effective rate of utilization of ammonia reduces.The spray ammonia combined desulfurization and denitrification process of moving bed process, although can be to avoid absorption titanium dioxide
The problem of sulphur causes activated coke denitration efficiency to reduce, but also exist simultaneously that activated coke loadings are larger, and denitration efficiency is more low
Problem.Shenhua Group Co and Shandong University, which are equal to 2016, applies for a kind of flue gas desulphurization system
(201611187075.0), guarantee the work Sulfur capacity of smoke desulfurization efficiency and adsorbent, the reality by design two-step desulfurization tower
Active coke desulphurizing process is considered with novel emphasis, is not directed to denitrification process.In the utility model, desulfurizing tower and denitration are separately designed
Tower after fresh activity coke is catalyzed gametic fertility, is sent into desulfurizing tower and carries out absorption desulfurization by controlling the classified utilization of activated coke.
Utility model content
For above-mentioned the technical problems existing in the prior art, the purpose of the utility model is to provide a kind of powdered activated cokes
The system of combined desulfurization and denitration.By setting fluid-bed sweetening tower and denitrating tower, make full use of fresh activity coke in denitrating tower
With the catalytic action on bag filter filtering layer, catalysis ammonia reduction removing nitrogen oxides is realized.
In order to solve problem above, the technical solution of the utility model is：
A kind of system of powdered activated coke combined desulfurization and denitration, including fluid-bed sweetening tower, fluidized bed denitration tower, spray ammonia
Device, activated coke warehouse, the first gas-solid separator, the second gas-solid separator and bag filter, wherein
The air inlet of the fluid-bed sweetening tower is connect with flue gas source, the gas outlet of fluid-bed sweetening tower and the first gas-solid point
Air inlet connection from device, the gas outlet of the first gas-solid separator are connect with the air inlet of fluidized bed denitration tower, fluidized bed denitration
The gas outlet of tower is connect with the air inlet of the second gas-solid separator, the gas outlet of the second gas-solid separator and cloth bag separator into
Port connection, the solid outlet of the second gas-solid separator are connect with the bottom of fluidized bed denitration tower, and the solid of cloth bag separator goes out
Mouth is connect with the bottom of fluid-bed sweetening tower；
Activated coke warehouse is connect with fluidized bed denitration tower, and ammonia-gas spraying device is connect with fluidized bed denitration tower；Ammonia is living in powder
Property burnt catalytic action under the nitrogen oxides in the flue gas after desulfurization is reduced into nitrogen, to carry out denitration；Cigarette after denitration
The powder activity coke carried in gas is successively separated by the second gas-solid separator and cloth bag separator, is separately recovered to fluidized bed denitration
It is recycled in fluid-bed sweetening tower.
By the flue gas after dedusting in fluid-bed sweetening tower after desulfurization, the content of sulfur dioxide in flue gas be down to it is very low, then
Into when denitration, the ability that will not be catalyzed ammonia nitrogen oxides reduction to fresh powder activity coke is caused in fluidized bed denitration tower
It influences, and then the denitration efficiency of powder activity coke can be improved.
Using the method denitration for spraying into ammonia and fresh powder activity coke into flue gas, fresh activity can be made full use of
Burnt catalytic effect, to improve the denitration efficiency of flue gas.And found through overtesting, powder activity after catalytic denitration is burnt
When being recycled to the progress desulfurization of fluid-bed sweetening tower, powder activity coke is had no effect on to the adsorption efficiency of sulfur dioxide, improves activity
Burnt service efficiency.
The utility model is carried out just using the powder activity coke that the flue gas after denitration is carried out by the second gas-solid separator
Secondary separation, the powder activity coke after first separation are recycled back in fluidized bed denitrating tower, and bag filter is carried out flue gas
Powder activity coke carries out secondary separation, carries out desulfurization in the powder activity coke circulating reflux fluidized bed desulfurizing tower after secondary separation, i.e.,
The synergistic effect of second gas-solid separator and bag filter realizes the steady of the amount of powder activated coke in desulfurizing tower and denitrating tower
It is fixed, guarantee that desulfurization and stablizing for denitration carry out.
During bag filter separated powder activated coke, it can persistently be formed in filter material surface and update powder activity coke
Filtering layer, the filtering layer and flue gas continuous contact can further adsorb the sulfur dioxide in flue gas, and be catalyzed ammonia nitrogen oxides reduction
As nitrogen, the efficiency of flue gas desulfurization and denitrification is on the one hand improved, on the other hand, the effective rate of utilization of activated coke can be improved.
Preferably, first gas-solid separator is cyclone separator.
It is further preferred that the air outlet of first gas-solid separator is located at the bottom of the first gas-solid separator.
Still more preferably, the specific structure of first gas-solid separator is cyclone separator.
It is further preferred that the solid outlet of first gas-solid separator is connect with the bottom of fluid-bed sweetening tower.
Preferably, the ammonia-gas spraying device is connect with the bottom of fluidized bed denitration tower.
It is further preferred that the activated coke warehouse is connect with the middle part of fluidized bed denitration tower.
The beneficial effects of the utility model are：
1. the utility model powdered activated coke is used as desulfuration adsorbent and denitrating catalyst simultaneously.
2. the powder activity coke of the utility model first carries out catalytic denitration, absorption desulfurization is being carried out, powder activity is improved
Burnt utilization rate, reduces fume treatment cost.
Detailed description of the invention
The accompanying drawings constituting a part of this application is used to provide further understanding of the present application, and the application's shows
Meaning property embodiment and its explanation are not constituted an undue limitation on the present application for explaining the application.
Fig. 1 is the structural schematic diagram of the system of the ozone oxidization combination desulfurization and denitration of the utility model.
Wherein, 1, cyclone separator, 2, fluid-bed sweetening tower, 3, bag filter, 4, fluidized bed denitration tower, 5, activated coke
Warehouse, 6, ammonia-gas spraying device.
Specific embodiment
It is noted that following detailed description is all illustrative, it is intended to provide further instruction to the application.Unless another
It indicates, all technical and scientific terms used herein has usual with the application person of an ordinary skill in the technical field
The identical meanings of understanding.
It should be noted that term used herein above is merely to describe specific embodiment, and be not intended to restricted root
According to the illustrative embodiments of the application.As used herein, unless the context clearly indicates otherwise, otherwise singular
Also it is intended to include plural form, additionally, it should be understood that, when in the present specification using term "comprising" and/or " packet
Include " when, indicate existing characteristics, step, operation, device, component and/or their combination.
As background technique is introduced, powder activity coke processing flue gas exists in the prior art and is difficult to realize remove simultaneously
The deficiency of sulfur dioxide and nitrogen oxides, in order to solve technical problem as above, present applicant proposes a kind of powdered activated coke connection
The system for closing desulfurization and denitration.
A kind of exemplary embodiment of the application provides the system of a kind of powdered activated coke combined desulfurization and denitration, packet
Include fluid-bed sweetening tower, fluidized bed denitration tower, ammonia-gas spraying device, activated coke warehouse, the first gas-solid separator, the second gas-solid separator
And bag filter, wherein
The air inlet of the fluid-bed sweetening tower is connect with flue gas source, the gas outlet of fluid-bed sweetening tower and the first gas-solid point
Air inlet connection from device, the gas outlet of the first gas-solid separator are connect with the air inlet of fluidized bed denitration tower, fluidized bed denitration
The gas outlet of tower is connect with the air inlet of the second gas-solid separator, the gas outlet of the second gas-solid separator and cloth bag separator into
Port connection, the solid outlet of the second gas-solid separator are connect with the bottom of fluidized bed denitration tower, and the solid of cloth bag separator goes out
Mouth is connect with the bottom of fluid-bed sweetening tower；
Activated coke warehouse is connect with fluidized bed denitration tower, and ammonia-gas spraying device is connect with fluidized bed denitration tower；Ammonia is living in powder
Property burnt catalytic action under the nitrogen oxides in the flue gas after desulfurization is reduced into nitrogen, to carry out denitration；Cigarette after denitration
The powder activity coke carried in gas is successively separated by the second gas-solid separator and cloth bag separator, is separately recovered to fluidized bed denitration
It is recycled in fluid-bed sweetening tower.
By the flue gas after dedusting in fluid-bed sweetening tower after desulfurization, the content of sulfur dioxide in flue gas be down to it is very low, then
Into when denitration, the ability that will not be catalyzed ammonia nitrogen oxides reduction to fresh powder activity coke is caused in fluidized bed denitration tower
It influences, and then the denitration efficiency of powder activity coke can be improved.
Using the method denitration for spraying into ammonia and fresh powder activity coke into flue gas, can prevent from carrying the resistance of sulphur activated coke
Hinder the catalytic effect of powder activity coke, to improve the denitration efficiency of flue gas.And found through overtesting, after catalytic denitration
When powder activity coke is recycled to the progress desulfurization of fluid-bed sweetening tower, has no effect on powder activity coke and the absorption of sulfur dioxide is imitated
Rate improves the service efficiency of activated coke.
The application is divided the powder activity coke that the flue gas after denitration is carried out using the second gas-solid separator for the first time
From the powder activity coke after first separation is recycled back in fluidized bed denitrating tower, the powder that bag filter is carried out flue gas
Activated coke carries out secondary separation, carries out desulfurization, i.e., second in the powder activity coke circulating reflux fluidized bed desulfurizing tower after secondary separation
The synergistic effect of gas-solid separator and bag filter realizes the stabilization of the amount of powder activated coke in desulfurizing tower and denitrating tower, protects
It demonstrate,proves desulfurization and stablizing for denitration carries out.
During bag filter separated powder activated coke, it can persistently be formed in filter material surface and update powder activity coke
Filtering layer, the filtering layer and flue gas continuous contact can further adsorb the sulfur dioxide in flue gas, and be catalyzed ammonia nitrogen oxides reduction
As case, the efficiency of flue gas desulfurization and denitrification is on the one hand improved, on the other hand, the effective rate of utilization of activated coke can be improved.
Preferably, first gas-solid separator is cyclone separator.
It is further preferred that the air outlet of first gas-solid separator is located at the bottom of the first gas-solid separator.Due to
The air outlet of fluid-bed sweetening tower is located at the top of desulfurizing tower, herein height with higher, and the air inlet of fluidized bed denitration tower
Mouth is located at bottom, has lower height, when the air outlet of the first gas-solid separator is located at the first gas-solid separator bottom, just
In the connection of the air inlet for the air outlet and fluidized bed denitration tower for realizing the first gas-solid separator, while shortening the circulation of flue gas
Distance reduces the thermal loss of flue gas, convenient for improving subsequent denitrating flue gas efficiency.
Still more preferably, the specific structure of first gas-solid separator is cyclone separator.
It is further preferred that the solid outlet of first gas-solid separator is connect with the bottom of fluid-bed sweetening tower.Just
It is recycled in fluid-bed sweetening tower in the powder activity coke that will be carried in flue gas, avoids the waste of powder activity coke and to communicating pipe
Road results in blockage.
Preferably, the ammonia-gas spraying device is connect with the bottom of fluidized bed denitration tower.Flue gas self-fluidized type bed denitration after desulfurization
The bottom of tower flows up through fluidized bed denitration tower, and ammonia is added to the bottom of fluidized bed denitration tower, can be extended by ammonia-gas spraying device
The time of contact of ammonia, powder activity coke and flue gas, convenient for improving the efficiency of activated coke catalysis ammonia nitrogen oxides reduction, in turn
Improve the denitration efficiency of flue gas.
It is further preferred that the activated coke warehouse is connect with the middle part of fluidized bed denitration tower.By fresh powder activity
The middle part of burnt self-fluidized type bed denitrating tower sprays into fluidized bed denitration tower, and flue gas and ammonia and powder activity coke counter current contacting make to live
Property coke catalysis ammonia nitrogen oxides reduction reaction rate gradually accelerate, it is easier to denitration efficiency is provided.
The another embodiment of the application provides the side for carrying out combined desulfurization and denitration to flue gas using above system
Method includes the following steps：
1) flue gas after dedusting flows into fluid-bed sweetening tower, the load sulphur activated coke and cloth that separate with the first gas-solid separator
Powder activity coke contact after the catalysis of bag dust collector separation, by the sulfur dioxide adsorbing and removing in flue gas；
2) flue gas after desulfurization into fluidized bed denitration tower, and adds ammonia and powder after gas solid separation thereto
Activated coke, by the nitrogen oxides in powder activity coke catalysis ammonia reduction flue gas at nitrogen, to remove nitrogen oxides；
3) flue gas after denitration is sent to chimney, the first gas-solid point after flowing through the second gas-solid separator and bag filter separation
The load sulphur coke isolated from device, which is recycled in fluid-bed sweetening tower, to be recycled, the isolated circulation of the second gas-solid separator
Coke is recycled in fluidized bed denitration tower and recycles, and the powder activity coke after the isolated catalysis of bag filter is added to stream
Desulfurization is carried out in fluidized bed desulfurizing tower.
Preferably, in step 1), the temperature of flue gas is 90~120 DEG C.
Preferably, in step 2), the dosage and the nitric oxide production molar ratio of flue gas of ammonia are (1~1.1)：1.
It is further preferred that the temperature of flue gas is 90~120 DEG C in fluidized bed denitration tower in step 2).
Preferably, in step 3), the second gas-solid separator to the separative efficiency of the powder activity coke in flue gas be 80%~
90%.
The partial size of powder activity coke is less than 1mm, preferably 0.1~0.7mm.
In order to enable those skilled in the art can clearly understand the technical solution of the application, below with reference to tool
The technical solution of the application is described in detail in the embodiment of body.
As shown in Figure 1, a kind of system of powdered activated coke combined desulfurization and denitration, it is de- to be equipped with cyclone separator 1, fluidized bed
Sulphur tower 2, inertia gas-solid separator, bag filter 3, fluidized bed denitration tower 4, activated coke warehouse 5, ammonia-gas spraying device 6.
Flue gas after boiler dust remover enters living with the powder after carrying sulphur activated coke and being catalyzed in fluid-bed sweetening tower 2
Property coke contact carry out desulfurization, the flue gas after desulfurization enter cyclone separator 1 carry out gas solid separation, the powder activity coke one under separating
Part is sent fluid-bed sweetening tower 2 back to through activated coke charging gear and is recycled, a part as carry sulphur activated coke transmitting system into
Row regeneration, the activated coke after regeneration have fresh desulphurizing ability, send activated coke warehouse 5 back to；
Flue gas enters fluidized bed denitration tower 4 through the outlet of cyclone separator 1, and activated coke warehouse 5 is freshly prepared for storing
The powder activity for having fresh desulphurizing ability after powdered activated coke and completion desulfurization and regeneration is burnt, the partial size of fresh powder activated coke
Less than 1mm, powder activity coke is sent into fluidized bed denitration tower 4 through charging gear, and the ammonia that ammonia-gas spraying device 6 uniformly sprays into is in powder
Activated coke catalysis under the action of by by the nitric oxide reduction in flue gas at nitrogen.Flue gas after denitration is followed by inertia gas-solid
Chimney is discharged into after separator and bag filter 3, inertia gas-solid separator is connect with fluidized bed denitration tower 4, by following after separation
Ring coke is recycled to fluidized bed denitration tower 4 and recycles, and bag filter 3 is connect with fluid-bed sweetening tower 2, urges for what will be separated
Activated coke after change is added into fluid-bed sweetening tower 2 as the sulfur dioxide in adsorbent absorption flue gas.
The foregoing is merely preferred embodiment of the present application, are not intended to limit this application, for the skill of this field
For art personnel, various changes and changes are possible in this application.Within the spirit and principles of this application, made any to repair
Change, equivalent replacement, improvement etc., should be included within the scope of protection of this application.
Claims (6)
1. a kind of system of powdered activated coke combined desulfurization and denitration, characterized in that including fluid-bed sweetening tower, fluidized bed denitration
Tower, ammonia-gas spraying device, activated coke warehouse, the first gas-solid separator, the second gas-solid separator and bag filter, wherein
The air inlet of the fluid-bed sweetening tower is connect with flue gas source, the gas outlet of fluid-bed sweetening tower and the first gas-solid separator
Air inlet connection, the gas outlet of the first gas-solid separator connect with the air inlet of fluidized bed denitration tower, fluidized bed denitration tower
Gas outlet is connect with the air inlet of the second gas-solid separator, the gas outlet of the second gas-solid separator and the air inlet of cloth bag separator
Connection, the solid outlet of the second gas-solid separator connect with the bottom of fluidized bed denitration tower, the solid outlet of cloth bag separator and
The bottom of fluid-bed sweetening tower connects；
Activated coke warehouse is connect with fluidized bed denitration tower, and ammonia-gas spraying device is connect with fluidized bed denitration tower；Ammonia is in powder activity coke
Catalytic action under the nitrogen oxides in the flue gas after desulfurization is reduced into nitrogen, to carry out denitration；In flue gas after denitration
The powder activity coke of carrying is successively separated by the second gas-solid separator and cloth bag separator, is separately recovered to fluidized bed denitration and stream
It is recycled in fluidized bed desulfurizing tower, the ammonia-gas spraying device is connect with the bottom of fluidized bed denitration tower.
2. the system as claimed in claim 1, characterized in that first gas-solid separator is cyclone separator.
3. system as claimed in claim 2, characterized in that the air outlet of first gas-solid separator is located at the first gas-solid point
Bottom from device.
4. system as claimed in claim 3, characterized in that the specific structure of first gas-solid separator is cyclonic separation
Device.
5. system as claimed in claim 2, characterized in that the solid outlet and fluid-bed sweetening of first gas-solid separator
The bottom of tower connects.
6. system as claimed in claim 5, characterized in that the activated coke warehouse is connect with the middle part of fluidized bed denitration tower.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108144443A (en) * | 2018-02-05 | 2018-06-12 | 山东大学 | A kind of powdered activated coke combined desulfurization and the system and method for denitration |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108144443A (en) * | 2018-02-05 | 2018-06-12 | 山东大学 | A kind of powdered activated coke combined desulfurization and the system and method for denitration |
| CN108144443B (en) * | 2018-02-05 | 2023-10-03 | 山东大学 | System and method for combined desulfurization and denitration of powdery active coke |
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