CN109395529A - A kind of flue gas series connection system for desulfuration and denitration and method - Google Patents
A kind of flue gas series connection system for desulfuration and denitration and method Download PDFInfo
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- CN109395529A CN109395529A CN201811593822.XA CN201811593822A CN109395529A CN 109395529 A CN109395529 A CN 109395529A CN 201811593822 A CN201811593822 A CN 201811593822A CN 109395529 A CN109395529 A CN 109395529A
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- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
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Abstract
The invention belongs to industrial waste gas Treatment process fields, specifically provide a kind of flue gas series connection system for desulfuration and denitration and method, flue gas is purified by the way that flue gas series connection is passed sequentially through desulfurization adsorption tower and denitration adsorption tower, simultaneously, activated coke individually is conveyed to desulfurization adsorption tower and denitration adsorption tower by activated coke supply unit, and the activated coke after reaction is delivered to the independent parsing of Analytic Tower progress and is recycled.On the one hand, by individually controlling activated coke conveying capacity and conveying speed in desulfurization and denitrating tower, the efficiency of denitration desulfurization is improved；On the other hand, it is precisely controlled activated coke conveying capacity and conveying speed, both realizes asynchronous to the usage amount of activated coke, reduces activated coke physical deterioration, reduces operating cost；And without heating before and after fume treatment, whole low energy consumption.
Description
Technical field
The invention belongs to industrial waste gas Treatment process fields, and in particular to a kind of flue gas series connection system for desulfuration and denitration and side
Method.
Background technique
Sintering machine head end, pellet roasting sintering flue gas amount are big, and flue gas initial temperature is low, the dry desulfurization denitration not heated up at present
Integrated technique is mainly leading with active coke desulphurizing denitration technology.To meet ultra-clean discharge, simultaneous SO_2 and NO removal, existing cloth
Set there are two types of modes: 1. desulphurization denitration is located in an adsorbent equipment arrangement up and down, and activated coke is defeated through bucket machine in regenerating unit
It send to adsorbent equipment, activated coke flows successively through denitration adsorption section and desulfurization adsorption section under the effect of gravity, finally by chain bucket
Machine is delivered at the top of regenerating unit, altogether by material lifting twice；2. desulfurizer, denitrification apparatus are horizontally disposed, regenerating unit
Interior activated coke is delivered at the top of denitrification apparatus through bucket machine, and the activated coke of denitrification apparatus bottom is delivered to by bucket machine after denitration
At the top of desulfurizer, desulfurizer bottom activated coke is delivered to regenerating unit by bucket machine, and activated coke is by material lifting three times.
Above two technique desulphurization and denitration device material Cascade System, however denitrification process is for the circulation speed of activated coke
Rate is required far below activated coke cycle rate needed for sweetening process, and denitrification process and sweetening process activated coke series circulation are unfavorable
It is precisely controlled activated coke internal circulating load respectively in system, denitrification process activated coke internal circulating load is caused to increase, activated coke physical deterioration adds
Play increases operating cost.
Therefore it provides the activated coke flue gas purifying technique that a kind of desulfurization is different from activated coke cycle rate in denitrification process.
The technique denitrification apparatus and the activated coke circulation canal of desulfurizer be it is in parallel, the activated coke cycle rate in denitrification apparatus is lower than
Activated coke cycle rate in desulfurizer can reduce the material loss in denitrification process, and desulphurization and denitration activated coke cycle rate
Can independent control, according to SO2、NOXDynamic change adjust desulphurization denitration activated coke cycle rate.
Summary of the invention
The purpose of the present invention is overcome the problems, such as that desulphurization denitration is lost activated coke big in the prior art.
For this purpose, the present invention provides a kind of flue gas series connection system for desulfuration and denitration, including desulfurization adsorption tower and denitration adsorption tower,
It further include the first Analytic Tower, the first feeding device, the first discharge device, the second Analytic Tower, the second feeding device and the second discharge
Device, flue gas is successively to chimney after desulfurization adsorption tower and denitration adsorption tower；
The discharge port of first Analytic Tower is connected to the material receiving port of first feeding device, first feeding device
Feeding port be connected to the feeding inlet of the desulfurization adsorption tower, the discharge port of the desulfurization adsorption tower and first discharge device
Material receiving port connection, the feeding port of first discharge device is connected to the feeding inlet of first Analytic Tower；
The discharge port of second Analytic Tower is connected to the material receiving port of second feeding device, second feeding device
Feeding port be connected to the feeding inlet of the denitration adsorption tower, the discharge port of the denitration adsorption tower and second discharge device
Material receiving port connection, the feeding port of second discharge device is connected to the feeding inlet of second Analytic Tower.
Preferably, the discharge port of first Analytic Tower is equipped with the first pan feeding valve, the material receiving port of first feeding device
It is connected to the first pan feeding valve, the feeding port of first feeding device is connected to the feeding inlet of the desulfurization adsorption tower；
The discharge port of the desulfurization adsorption tower is equipped with the first blow-off valve, the material receiving port of first discharge device and described the
The connection of one blow-off valve, the feeding port of first discharge device are connected to the feeding inlet of first Analytic Tower.
Preferably, the discharge port of second Analytic Tower is equipped with the second pan feeding valve, the material receiving port of second feeding device
It is connected to the second pan feeding valve, the feeding port of second feeding device is connected to the feeding inlet of the denitration adsorption tower；
The discharge port of the denitration adsorption tower is equipped with the second blow-off valve, the material receiving port of second discharge device and described the
The connection of two blow-off valves, the other end are connected to the feeding inlet of second Analytic Tower.
Preferably, the discharge port of the discharge port of first Analytic Tower and second Analytic Tower is respectively equipped with the first screening
Device and the second screening plant, the outlet of first screening plant and the outlet of second screening plant are respectively with described the
One feeding device and second feeding device connection.
Preferably, the system also includes booster fan, the booster fan is used for the cigarette of the inlet of the system
Gas pressurization.
Preferably, ammonia injection flue is equipped at the flue entrance of the denitration adsorption tower, the ammonia injection flue is used
Ammonia is sprayed into giving in the denitration adsorption tower.
Preferably, the concentration of the ammonia is 1~5%.
The present invention also provides a kind of series connection desulfurization denitration methods, comprising:
Activated coke is delivered to desulfurization adsorption tower by the first feeding device, and flue gas enters desulfurization adsorption tower and reacts with activated coke
Carry out desulfurization process；
First solution is delivered to by the first discharge device with the activated coke after smoke reaction in the desulfurization adsorption tower
Tower is analysed, the activated coke after being parsed passes through the first feeding device again and transports to desulfurization adsorption tower, the cigarette after desulfurization process
Gas enters denitration adsorption tower by flue；
Second solution is delivered to by the second discharge device with the activated coke after smoke reaction in the denitration adsorption tower
Tower is analysed, the activated coke after being parsed passes through the second feeding device again and transports to denitration adsorption tower, the cigarette after denitration process
Gas enters denitration adsorption tower by flue.
Preferably, pass through flue dust direct emission by the denitration adsorption tower treated flue gas.
Beneficial effects of the present invention: this flue gas series connection system for desulfuration and denitration provided by the invention and method, by by cigarette
Gas series connection passes sequentially through desulfurization adsorption tower and denitration adsorption tower to purify to flue gas, meanwhile, pass through activated coke supply unit
Activated coke individually is conveyed to desulfurization adsorption tower and denitration adsorption tower, and the activated coke after reaction is delivered to Analytic Tower and is carried out
Individually parsing recycles.On the one hand, it by individually controlling activated coke conveying capacity and conveying speed in desulfurization and denitrating tower, mentions
The high efficiency of denitration desulfurization；On the other hand, it is precisely controlled activated coke conveying capacity and conveying speed, realizes the two to activated coke
Usage amount it is asynchronous, reduce activated coke physical deterioration, reduce operating cost；It is whole and without heating before and after fume treatment
Low energy consumption.
The present invention is described in further details below with reference to attached drawing.
Detailed description of the invention
Fig. 1 is flue gas series connection system for desulfuration and denitration schematic diagram of the present invention.
Description of symbols: desulfurization adsorption tower 11, the first Analytic Tower 12, the first feeding device 13, the first discharge device 14,
First screening plant 15, the first pan feeding valve 16, the first blow-off valve 17, denitration adsorption tower 21, the second Analytic Tower 22, the second pan feeding dress
Set 23, the second discharge device 24, the second screening plant 25, the second pan feeding valve 26, the second blow-off valve 27, chimney 1, booster fan 2.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts all other
Embodiment shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that, term " center ", "upper", "lower", "front", "rear", " left side ",
The orientation or positional relationship of the instructions such as " right side ", "vertical", "horizontal", "top", "bottom", "inner", "outside" is based on the figure
Orientation or positional relationship is merely for convenience of description of the present invention and simplification of the description, rather than the device of indication or suggestion meaning or
Element must have a particular orientation, be constructed and operated in a specific orientation, therefore be not considered as limiting the invention.
Term " first ", " second " be used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance or
Implicitly indicate the quantity of indicated technical characteristic." first " is defined as a result, the feature of " second " can be expressed or imply
Ground includes one or more of the features；In the description of the present invention, unless otherwise indicated, the meaning of " plurality " is two or
It is more than two.
The embodiment of the invention provides a kind of flue gas series connection system for desulfuration and denitration, including desulfurization adsorption tower 11 and denitration absorption
Tower 21 further includes the first Analytic Tower 12, the first feeding device 13, the first discharge device 14, the second Analytic Tower 22, the second pan feeding dress
23 and second discharge device 24 are set, flue gas is successively to chimney 1 after desulfurization adsorption tower 11 and denitration adsorption tower 21；
The discharge port of first Analytic Tower 12 is connected to the material receiving port of first feeding device 13, first pan feeding
The feeding port of device 13 is connected to the feeding inlet of the desulfurization adsorption tower 11, the discharge port of the desulfurization adsorption tower 11 and described the
The material receiving port of one discharge device 14 is connected to, the feeding inlet of the feeding port of first discharge device 14 and first Analytic Tower 12
Connection；
The discharge port of second Analytic Tower 22 is connected to the material receiving port of second feeding device 23, second pan feeding
The feeding port of device 23 is connected to the feeding inlet of the denitration adsorption tower 21, the discharge port of the denitration adsorption tower 21 and described the
The material receiving port of two discharge devices 24 is connected to, the feeding inlet of the feeding port of second discharge device 24 and second Analytic Tower 22
Connection.
It follows that in the prior art, for simultaneous SO_2 and NO removal, and reaching ultra-clean discharge standard, existing activity
Burnt flue gases purification uses the double section technologies of single column and double-column in series technology.Activated coke (i.e. active carbon) meeting in sweetening process
It is highly exothermic, it needs that activated coke is rapidly removed reaction tower in time；It is less that heat is discharged in denitrification process, activated coke, which removes, inhales
The speed of attached tower can suitably slow down slowly, in above two technique, in order to guarantee system safety operation, it is necessary to sweetening process
In faster speed be discharged activated coke in tower, but in order to maintain system material balance, needed in denitrification process with mutually synchronized
Degree discharge activated coke, will cause the increase of activated coke internal circulating load in this way, increases activated coke physical deterioration, increase operating cost.
For above-mentioned defect and problem, Fig. 1 is the schematic diagram of the embodiment of the present invention, as shown in Figure 1, the first feeding device
Activated coke is delivered to desulfurization adsorption tower 11 by 13, and flue gas react progress desulfurization from the entrance of desulfurization adsorption tower 11 and with activated coke
Processing；The first Analytic Tower 12 is delivered to by the first discharge device 14 with the activated coke after smoke reaction in desulfurization adsorption tower 11,
Activated coke after being parsed passes through flue gas of the first feeding device 13 transport to desulfurization adsorption tower 11, after desulfurization process again
Denitration adsorption tower 21 is entered by flue；Pass through the second discharge device with the activated coke after smoke reaction in denitration adsorption tower 21
24 are delivered to the second Analytic Tower 22, and the activated coke after being parsed passes through the transport of the second feeding device 23 to denitration adsorption tower again
21, the flue gas after denitration process enters denitration adsorption tower 21 by flue.Wherein, desulfurization adsorption tower 11 is used to desulfurization,
Main removing SO2, denitration adsorption tower 21 is used to denitration, mainly removes NOx, and double tower independently configures activated coke parsing (regeneration)
System, i.e. Analytic Tower can be precisely controlled activated coke conveying capacity and conveying speed during desulphurization and denitration respectively in this way, reduce
The overall amount of having bad luck of activated coke reaches the purpose for reducing activated coke physical deterioration, so that it is low to reduce operating cost.
The discharge port of preferred scheme, first Analytic Tower 12 is equipped with the first pan feeding valve 16, first feeding device
13 material receiving port is connected to the first pan feeding valve 16, the feeding port of first feeding device 13 and the desulfurization adsorption tower 11
Feeding inlet connection；
The discharge port of the desulfurization adsorption tower 11 be equipped with the first blow-off valve 17, the material receiving port of first discharge device 14 with
First blow-off valve 17 is connected to, and the feeding inlet of the feeding port of first discharge device 14 and first Analytic Tower 12 connects
It is logical.It follows that the activated coke after reaction is discharged from adsorption tower bottom as shown in Figure 1, regeneration activity coke enters from adsorption tower jacking,
And the speed and amount of discharge are precisely controlled by blow-off valve, while guaranteeing efficient absorption, the activated coke amount of having bad luck is reduced, is reduced
Operating cost.
The discharge port of preferred scheme, second Analytic Tower 22 is equipped with the second pan feeding valve 26, second feeding device
23 material receiving port is connected to the second pan feeding valve 26, the feeding port of second feeding device and the denitration adsorption tower 21
Feeding inlet connection；
The discharge port of the denitration adsorption tower 21 be equipped with the second blow-off valve 27, the material receiving port of second discharge device 24 with
Second blow-off valve 27 is connected to, and the other end is connected to the feeding inlet of second Analytic Tower 22.
The discharge port of preferred scheme, first Analytic Tower 12 and second Analytic Tower 22 is respectively equipped with the first screening
Device 15 and the second screening plant 25, the outlet of first screening plant 15 are distinguished with the outlet of second screening plant 25
It is connected to first feeding device 13 and second feeding device 22.It follows that as shown in Figure 1, the first screening plant
A small amount of little particle activated coke under 15 sieves is discharged into flue dust tank after collecting, and uses as fuel, wherein regenerating the high concentration released
SO2 mixed gas is used to prepare the concentrated sulfuric acid using the technology of existing maturation.A small amount of small under second screening plant 25 sieve
Grain activated coke coke powder is discharged into flue dust tank after collecting, and uses as fuel.
Preferred scheme, the integral system further include booster fan 2, and the booster fan 2 is used for the desulfurization
The flue gas of the inlet of adsorption tower 11 pressurizes.It follows that as shown in Figure 1, former flue gas extraction is more held after booster fan boosts
Easily enter desulfurization adsorption tower 11.
Preferred scheme is equipped with ammonia injection flue, the ammonia injection at the flue entrance of the denitration adsorption tower 21
Flue is used for spraying into ammonia in the denitration adsorption tower 21.It follows that as shown in Figure 1, in denitration adsorption column inlet flue
1~5% dilution ammonia is sprayed into be used to remove NOx.
Beneficial effects of the present invention: this flue gas series connection system for desulfuration and denitration provided by the invention and method, by by cigarette
Gas series connection passes sequentially through desulfurization adsorption tower and denitration adsorption tower to purify to flue gas, meanwhile, pass through activated coke supply unit
Activated coke individually is conveyed to desulfurization adsorption tower and denitration adsorption tower, and the activated coke after reaction is delivered to Analytic Tower and is carried out
Individually parsing recycles.On the one hand, it by individually controlling activated coke conveying capacity and conveying speed in desulfurization and denitrating tower, mentions
The high efficiency of denitration desulfurization；On the other hand, it is precisely controlled activated coke conveying capacity and conveying speed, realizes the two to activated coke
Usage amount it is asynchronous, reduce activated coke physical deterioration, reduce operating cost；It is whole and without heating before and after fume treatment
Low energy consumption.
The foregoing examples are only illustrative of the present invention, does not constitute the limitation to protection scope of the present invention, all
It is within being all belonged to the scope of protection of the present invention with the same or similar design of the present invention.
Claims (9)
- The system for desulfuration and denitration 1. a kind of flue gas is connected, it is characterised in that: including desulfurization adsorption tower (11) and denitration adsorption tower (21), Further include the first Analytic Tower (12), the first feeding device (13), the first discharge device (14), the second Analytic Tower (22), second enter Expect device (23) and the second discharge device (24), flue gas is successively to cigarette after desulfurization adsorption tower (11) and denitration adsorption tower (21) Chimney (1)；The discharge port of first Analytic Tower (12) is connected to the material receiving port of first feeding device (13), first pan feeding The feeding port of device (13) is connected to the feeding inlet of the desulfurization adsorption tower (11), the discharge port of the desulfurization adsorption tower (11) with The material receiving port of first discharge device (14) is connected to, the feeding port and first Analytic Tower of first discharge device (14) (12) feeding inlet connection；The discharge port of second Analytic Tower (22) is connected to the material receiving port of second feeding device (23), second pan feeding The feeding port of device (23) is connected to the feeding inlet of the denitration adsorption tower (21), the discharge port of the denitration adsorption tower (21) with The material receiving port of second discharge device (24) is connected to, the feeding port and second Analytic Tower of second discharge device (24) (22) feeding inlet connection.
- The system for desulfuration and denitration 2. flue gas according to claim 1 is connected, it is characterised in that: first Analytic Tower (12) Discharge port is equipped with the first pan feeding valve (16), and the material receiving port of first feeding device (13) and the first pan feeding valve (16) are even Logical, the feeding port of first feeding device (13) is connected to the feeding inlet of the desulfurization adsorption tower (11)；The discharge port of the desulfurization adsorption tower (11) is equipped with the first blow-off valve (17), the material receiving port of first discharge device (14) It is connected to first blow-off valve (17), the feeding port of first discharge device (14) and entering for the first Analytic Tower (12) Material mouth connection.
- The system for desulfuration and denitration 3. flue gas according to claim 1 or 2 is connected, it is characterised in that: second Analytic Tower (22) discharge port is equipped with the second pan feeding valve (26), the material receiving port and the second pan feeding valve of second feeding device (23) (26) it is connected to, the feeding port of second feeding device is connected to the feeding inlet of the denitration adsorption tower (21)；The discharge port of the denitration adsorption tower (21) is equipped with the second blow-off valve (27), the material receiving port of second discharge device (24) It is connected to second blow-off valve (27), the other end is connected to the feeding inlet of second Analytic Tower (22).
- The system for desulfuration and denitration 4. flue gas according to claim 1 is connected, it is characterised in that: first Analytic Tower (12) The discharge port of discharge port and second Analytic Tower (22) is respectively equipped with the first screening plant (15) and the second screening plant (25), The outlet of the outlet of first screening plant (15) and second screening plant (25) respectively with first feeding device (13) and second feeding device (23) is connected to.
- The system for desulfuration and denitration 5. flue gas according to claim 1 is connected, it is characterised in that: the system also includes pressurization wind Machine (2), the booster fan (2) are used to pressurize to the flue gas of the inlet of the system.
- The system for desulfuration and denitration 6. flue gas according to claim 1 is connected, it is characterised in that: the denitration adsorption tower (21) Ammonia injection flue is equipped at flue entrance, the ammonia injection flue is used for penetrating ammonia in the denitration adsorption tower (21) Gas.
- The system for desulfuration and denitration 7. flue gas according to claim 1 is connected, it is characterised in that: the concentration of the ammonia is 1~ 5%.
- 8. a kind of series connection desulfurization denitration method characterized by comprisingActivated coke is delivered to desulfurization adsorption tower (11) by the first feeding device (13), and flue gas enters desulfurization adsorption tower (11) and lives Property coke reaction carry out desulfurization process；Described the is delivered to by the first discharge device (14) with the activated coke after smoke reaction in the desulfurization adsorption tower (11) One Analytic Tower (12), the activated coke after being parsed pass through the first feeding device (13) transport to desulfurization adsorption tower (11), warp again Flue gas after crossing desulfurization process enters denitration adsorption tower (21) by flue；Described the is delivered to by the second discharge device (24) with the activated coke after smoke reaction in the denitration adsorption tower (21) Two Analytic Towers (22), the activated coke after being parsed pass through the second feeding device (23) transport to denitration adsorption tower (21), warp again Flue gas after crossing denitration process enters denitration adsorption tower (21) by flue.
- 9. series connection desulfurization denitration method according to claim 8, it is characterised in that: by the denitration adsorption tower (21) Flue gas after reason passes through flue dust (1) direct emission.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811593822.XA CN109395529A (en) | 2018-12-25 | 2018-12-25 | A kind of flue gas series connection system for desulfuration and denitration and method |
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| CN201811593822.XA CN109395529A (en) | 2018-12-25 | 2018-12-25 | A kind of flue gas series connection system for desulfuration and denitration and method |
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| CN110261546A (en) * | 2019-06-28 | 2019-09-20 | 中冶南方都市环保工程技术股份有限公司 | The experimental rig and method of active coke desulphurizing and denitration performance can be tested simultaneously |
| CN112191083A (en) * | 2020-09-15 | 2021-01-08 | 武汉钢铁有限公司 | Sintering flue gas active coke desulfurization and denitrification ultralow emission treatment system and method |
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| CN207667379U (en) * | 2017-11-21 | 2018-07-31 | 国电科学技术研究院 | It is suitble to the activated coke system of garbage-incineration smoke purifying |
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