CN107081060A - One kind is applied to demisting dust pelletizing system and its technique after catalytic cracking tail gas desulfurization - Google Patents
One kind is applied to demisting dust pelletizing system and its technique after catalytic cracking tail gas desulfurization Download PDFInfo
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- CN107081060A CN107081060A CN201710405084.0A CN201710405084A CN107081060A CN 107081060 A CN107081060 A CN 107081060A CN 201710405084 A CN201710405084 A CN 201710405084A CN 107081060 A CN107081060 A CN 107081060A
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- Prior art keywords
- tail gas
- catalytic cracking
- desulfurization
- demisting
- groups
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8603—Removing sulfur compounds
- B01D53/8609—Sulfur oxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/30—Particle separators, e.g. dust precipitators, using loose filtering material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/66—Regeneration of the filtering material or filter elements inside the filter
- B01D46/68—Regeneration of the filtering material or filter elements inside the filter by means acting on the cake side involving movement with regard to the filter elements
- B01D46/681—Regeneration of the filtering material or filter elements inside the filter by means acting on the cake side involving movement with regard to the filter elements by scrapers, brushes or the like
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2247/00—Details relating to the separation of dispersed particles from gases, air or vapours by liquid as separating agent
- B01D2247/10—Means for removing the washing fluid dispersed in the gas or vapours
Abstract
Demisting dust pelletizing system and its technique after catalytic cracking tail gas desulfurization are applied to the invention discloses one kind, is included applied to demisting dust pelletizing system after catalytic cracking tail gas desulfurization：Demisting deduster, demisting deduster includes being sequentially provided with desulfurizer, tubular demister, some groups of filter groups and some groups of loose fiber beds in the housing of a sealing shape, housing, and housing bottom is provided with air inlet, and case top is provided with gas outlet；Rinse-system, rinse-system is connected with demisting deduster, and rinse-system can be rinsed to tubular demister, some groups of filter groups and some groups of loose fiber beds respectively, be comprised the following steps applied to demisting dust collecting process after catalytic cracking tail gas desulfurization：(1) desulfurization is carried out to catalytic cracking tail gas first；(2) tail gas after desulfurization passes sequentially through tubular demister, filter group and loose fiber bed and filtered.The present invention greatly reduces processing cost, and causes the discharge gas after filtering to meet discharge standard.
Description
Technical field
The present invention relates to catalytic cracking tail gas process field, and in particular to one kind is removed after being applied to catalytic cracking tail gas desulfurization
Mist dust pelletizing system and its technique.
Background technology
Catalytic cracking unit gaseous contamination is mainly derived from the flue gas produced when regenerator burns.Have in flue gas a large amount of CO,
SOx, NOx and a large amount of catalyst dusts, are such as directly emptied severe contamination air.In numerous desulfurization and dust-removal methods, wet method
Desulfurization is the most stable of methods of SOX in reduction flue gas.But flue gas can carry slurries secretly in process of wet desulphurization, wet desulphurization in addition
Dust pollution can not be removed.
Common practice is that demister or wet electric cleaner are added at the top of desulfurizing tower to the further place of flue gas both at home and abroad at present
Reason.Based on catalytic cracking tail gas characteristic, common demister can not be to its effective processing；Wet electric cleaner processing cost is too high.
The content of the invention
The present invention is in order to solve the above problems, so as to provide a kind of applied to demisting dedusting system after catalytic cracking tail gas desulfurization
System and its technique.
To reach above-mentioned purpose, technical scheme is as follows：
One kind is applied to demisting dust pelletizing system after catalytic cracking tail gas desulfurization, described to be applied to after catalytic cracking tail gas desulfurization
Demisting dust pelletizing system includes：
Demisting deduster, the demisting deduster includes from bottom to top setting successively in the housing of a sealing shape, the housing
There are desulfurizer, tubular demister, some groups of filter groups and some groups of loose fiber beds, the housing bottom is provided with air inlet
Mouthful, the case top is provided with gas outlet；
Rinse-system, the rinse-system is connected with demisting deduster, and the rinse-system can be removed to tubular type respectively
Day with fog, some groups of filter groups and some groups of loose fiber beds are rinsed.
In a preferred embodiment of the invention, the overall presure drop of the enclosure interior<350Pa.
In a preferred embodiment of the invention, the spacing of the tubular demister is 15mm~50mm.
In a preferred embodiment of the invention, the spacing of filter group is 10mm~50mm.
In a preferred embodiment of the invention, the filtering accuracy of the loose fiber bed is 1um.
In a preferred embodiment of the invention, the rinse-system includes water tank, filter, water pump and some groups
Nozzle, these group of nozzle be separately positioned between tubular demister and filter group and two adjacent groups filter group between, institute
State water tank and be arranged on housing side, the water inlet end of the water pump is connected by pipeline with water tank, the water side of the water pump
Connected by the water inlet end of pipeline and filter, the water side of the filter is connected by pipeline with each group nozzle respectively.
One kind is applied to demisting dust collecting process after catalytic cracking tail gas desulfurization, it is characterised in that described to be split applied to catalysis
Change demisting dust collecting process after tail gas desulfurization to comprise the following steps：
(1) desulfurization is carried out to catalytic cracking tail gas first；
(2) tail gas after desulfurization passes sequentially through tubular demister, filter group and loose fiber bed and filtered.
In a preferred embodiment of the invention, catalytic cracking tail gas is entered in housing by air inlet, after filtering
Gas discharged by gas outlet.
In a preferred embodiment of the invention, tubular demister will be carried secretly in tail gas after desulfurization slurries and solid
Grain thing is removed.
In a preferred embodiment of the invention, filter group removes more than 8um dust in tail gas after desulfurization, loose
Fibre bed will remove more than 1um dust in tail gas after desulfurization.
The beneficial effects of the invention are as follows：
The present invention greatly reduces processing cost, and causes the discharge gas after filtering to meet discharge standard.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the accompanying drawing used required in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is structural representation of the invention.
Embodiment
In order that the technical means, the inventive features, the objects and the advantages of the present invention are easy to understand, tie below
Conjunction is specifically illustrating, and the present invention is expanded on further.
Referring to Fig. 1, what the present invention was provided is applied to demisting dust pelletizing system after catalytic cracking tail gas desulfurization, and it includes demisting and removed
Dirt device 100 and rinse-system 200.
Demisting deduster 100 includes the housing 110 of a sealing shape, air inlet 111 is provided with the bottom of housing 110, in housing
110 tops are provided with gas outlet 112, and catalytic cracking tail gas can enter housing 110 by air inlet 111 from the bottom of housing 110
Interior, due to Effects of Density, the top of housing 110 can be flowed to by entering the catalytic cracking tail gas of the bottom of housing 110, then from gas outlet
112 discharges.
The filtering of gas is all carried out in housing 110 after the desulfurization and desulfurization of catalytic cracking tail gas, and is to enter successively
OK, operating efficiency is so substantially increased.
The bottom right in housing 110 and on be sequentially provided with desulfurizer 300, tubular demister 400, some groups of filter groups
500 and some groups of loose fibers bed 600.
Desulfurizer 300, it is arranged on the bottom of housing 110, positioned at the top of air inlet 111, is entered by air inlet 111
Catalytic cracking tail gas in housing 110 can pass through desulfurizer 300 first.
Desulfurizer 300 can carry out desulfurization to catalytic cracking tail gas.
Tubular demister 400, it is located at the top of desulfurizer 300, and the tail gas after the desulfurization of desulfurizer 300 can pass through
Tubular demister 400.
Tubular demister 400 is for tentatively being filtered to the tail gas after desulfurization, by the slurries carried secretly in tail gas and admittedly
Body particulate matter is removed.
Some groups of filter groups 500, these group of filter group 500 is vertically even away from being arranged on tubular demister respectively
400 tops, the tail gas after tubular demister 400 tentatively filtering can sequentially pass through each group filter group 500.
Filter group 500 is for being filtered again to the tail gas after desulfurization, by more than the 8um dust carried secretly in tail gas
It is removed.
Some groups of loose fibers bed 600, these group of loose fiber bed 600 is even away from being arranged in most in the horizontal direction respectively
The top of filter group 500 of later group, and positioned at the lower section of gas outlet 112, the tail gas for sequentially passing through each group filter group 500 can be same
When by each group loose fiber bed 600.
Loose fiber bed 600 be for after filter group 500 tail gas carry out precision filtering, can be by more than 1um
Dust is removed completely.
Tail gas after the filtering of loose fiber bed 600 directly can be discharged into outside by gas outlet 112.
In addition, in order to further improve filter effect, the overall presure drop of enclosure interior<350Pa, so that the flow velocity of tail gas
It is maintained at 2~6m/s.
Furthermore, in order to not influence the flow velocity of tail gas, between the filter group 500 and tubular demister 400 of most bottom side
Spacing be 15mm~50mm, the spacing between two adjacent groups filter group is 10mm~50mm.
Installation site and the filtering of tubular demister 400, filter group 500 and loose fiber bed 600 in the application
Density is all specific, is all that the application is obtained by countless experiments, only using such scheme, can be by tail after desulfurization
Contaminant filter in gas is clean, meets discharge standard.
Rinse-system 200, it is connected with housing 110, and it is for the tubular demister 400 in housing 110, mistake
Filter plates 500 and loose fiber bed 600 are rinsed, it is ensured that tubular demister 400, filter group 500 and loose fiber bed
600 filtering accuracy.
Rinse-system 200 includes water tank 210, filter 220, water pump 230 and some groups of nozzles 240.
These group of nozzle 240 is separately positioned between tubular demister 300 and filter group 400 and two adjacent groups filtering
Between plate group 400, tubular demister 400, filter group 500 and loose fiber bed 600 can be rushed by the water spray of nozzle 240
Wash.
Water tank 210 is arranged on the side of housing 110, and it is to be used to store clear water, it is ensured that have clear water flushing at any time.
The water inlet end of water pump 230 is connected by pipeline with water tank 210, and the water side of water pump 230 passes through pipeline and filtering
The water inlet end connection of device 220, water pump 230 can extract the water in water tank 210 out when working, and deliver to filter 220.
The water side of filter 220 is connected by pipeline with each group nozzle 240 respectively, and filter 220 can be defeated by water pump 230
The water sent is filtered, and the water after filtering is transported into each group nozzle 240.
Filter 220 is used for water filtration, prevents from including other impurities in water, thus adsorb in tubular demister 400 or
In filter group 500 or loose fiber bed 600, so as to influence filter effect.
Further, since desulfurizer 300 is located at system with tubular demister 400, filter group 500 and loose fiber bed 600
In one housing, the waste water that rinse-system 200 is rinsed to tubular demister 400, filter group 500 and loose fiber bed 600 can be through
Desulfurizer 300 is crossed, desulfurizer 300 can be also rinsed, desulfurized effect is so both improved, water resource has been saved again.
In addition, a collecting tank can be set in the bottom of housing 110, collecting tank is connected by pipeline with outside desulfurizing tower, is rushed
Wash rear waste liquid reflowable in collecting tank, collecting tank can be reclaimed to waste liquid, and be transported in Desulfurization tower slurry area.
Implementation based on such scheme, demisting dedusting after catalytic cracking tail gas desulfurization is applied to disclosed herein as well is one kind
Technique, the technique comprises the following steps：
(1) desulfurization is carried out to catalytic cracking tail gas first；
(2) tail gas after desulfurization passes sequentially through tubular demister 400, filter group 500 and loose fiber bed 600 and carried out
Filter.
Wherein, catalytic cracking tail gas is entered in housing by air inlet, and the gas after filtering is discharged by gas outlet, and
And the flow velocity of the tail gas entered in housing remains at 2~6m/s, filter effect can be so improved.
In addition, in this technique, tubular demister 300 can remove the slurries and solid particulate matter carried secretly in tail gas after desulfurization
Remove, then filter group again removes more than 8um dust in tail gas after desulfurization, last loose fiber bed will after by desulfurization tail gas
Middle more than 1um dust is removed.
Furthermore, in order to not influence filter effect and saving water resource, after tubular demister 400 is run 1~6 hour, punching
Washing system 200 can rinse successively to tubular demister 400, filter group 500 and loose fiber bed 600.
The general principle and principal character and advantages of the present invention of the present invention has been shown and described above.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the simply explanation described in above-described embodiment and specification is originally
The principle of invention, without departing from the spirit and scope of the present invention, various changes and modifications of the present invention are possible, these changes
Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its
Equivalent thereof.
Claims (10)
1. one kind is applied to demisting dust pelletizing system after catalytic cracking tail gas desulfurization, it is characterised in that described to be applied to catalytic cracking
Demisting dust pelletizing system includes after tail gas desulfurization：
Demisting deduster, the demisting deduster includes the housing of a sealing shape, is sequentially provided with the housing de-
Sulphur device, tubular demister, some groups of filter groups and some groups of loose fiber beds, the housing bottom are provided with air inlet, institute
Case top is stated provided with gas outlet；
Rinse-system, the rinse-system and demisting deduster are connected, the rinse-system can respectively to tubular demister,
Some groups of filter groups and some groups of loose fiber beds are rinsed.
2. it is according to claim 1 a kind of applied to demisting dust pelletizing system after catalytic cracking tail gas desulfurization, it is characterised in that
The overall presure drop of the enclosure interior<350Pa.
3. it is according to claim 1 a kind of applied to demisting dust pelletizing system after catalytic cracking tail gas desulfurization, it is characterised in that
The spacing of the tubular demister is 15mm~50mm.
4. it is according to claim 1 a kind of applied to demisting dust pelletizing system after catalytic cracking tail gas desulfurization, it is characterised in that
The spacing of filter group is 10mm~50mm.
5. it is according to claim 1 a kind of applied to demisting dust pelletizing system after catalytic cracking tail gas desulfurization, it is characterised in that
The filtering accuracy of the loose fiber bed is 1um.
6. it is according to claim 1 a kind of applied to demisting dust pelletizing system after catalytic cracking tail gas desulfurization, it is characterised in that
The rinse-system includes water tank, filter, water pump and some groups of nozzles, and these group of nozzle is separately positioned on tubular demister
Between filter group and between two adjacent groups filter group, the water tank is arranged on housing side, and the water pump enters
Water end (W.E.) is connected by pipeline with water tank, and the water side of the water pump is connected by the water inlet end of pipeline and filter, the mistake
The water side of filter is connected by pipeline with each group nozzle respectively.
7. one kind is applied to demisting dust collecting process after catalytic cracking tail gas desulfurization, it is characterised in that described to be applied to catalytic cracking
Demisting dust collecting process comprises the following steps after tail gas desulfurization：
(1) desulfurization is carried out to catalytic cracking tail gas first；
(2) tail gas after desulfurization passes sequentially through tubular demister, filter group and loose fiber bed and filtered.
8. it is according to claim 7 a kind of applied to demisting dust collecting process after catalytic cracking tail gas desulfurization, it is characterised in that
Catalytic cracking tail gas is entered in housing by air inlet, and the gas after filtering is discharged by gas outlet.
9. it is according to claim 7 a kind of applied to demisting dust collecting process after catalytic cracking tail gas desulfurization, it is characterised in that
Tubular demister removes the slurries and solid particulate matter carried secretly in tail gas after desulfurization.
10. according to claim 7 a kind of applied to demisting dust collecting process after catalytic cracking tail gas desulfurization, its feature exists
In filter group removes more than 8um dust in tail gas after desulfurization, and loose fiber bed will be by more than 1um powder in tail gas after desulfurization
Dirt is removed.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710405084.0A CN107081060A (en) | 2017-05-31 | 2017-05-31 | One kind is applied to demisting dust pelletizing system and its technique after catalytic cracking tail gas desulfurization |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710405084.0A CN107081060A (en) | 2017-05-31 | 2017-05-31 | One kind is applied to demisting dust pelletizing system and its technique after catalytic cracking tail gas desulfurization |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107469544A (en) * | 2017-10-09 | 2017-12-15 | 广州舒创有限公司 | Pneumatic emulsifying processing unit and system |
| CN110124503A (en) * | 2019-04-30 | 2019-08-16 | 上海安赐环保科技股份有限公司 | A kind of flue gas demisting dedusting disappears white device and technique |
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| US20140072483A1 (en) * | 2012-09-10 | 2014-03-13 | Mitsubishi Heavy Industries, Ltd. | Desulfurization device and particulate collection system |
| CN104971612A (en) * | 2015-07-27 | 2015-10-14 | 中钢集团天澄环保科技股份有限公司 | Catalytic cracking flue gas precipitation and desulfuration cooperative treatment process |
| CN105688558A (en) * | 2016-03-04 | 2016-06-22 | 上海安赐环保科技股份有限公司 | Falling film washing system realizing ultralow emission of coal-fired power plant desulfurated tail gas and technology thereof |
| CN106693586A (en) * | 2017-01-20 | 2017-05-24 | 上海安赐环保科技股份有限公司 | Demisting dedusting system and process for ammonium sulfate dry tail gas |
| CN106693548A (en) * | 2017-01-20 | 2017-05-24 | 上海安赐环保科技股份有限公司 | Demisting and dedusting system and technique applied to urea granulation end gas |
| CN106693585A (en) * | 2017-01-20 | 2017-05-24 | 上海安赐环保科技股份有限公司 | Brick kiln tail gas treatment system and process |
| CN206911124U (en) * | 2017-05-31 | 2018-01-23 | 上海安赐环保科技股份有限公司 | One kind is applied to demisting dust pelletizing system after catalytic cracking tail gas desulfurization |
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2017
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US20140072483A1 (en) * | 2012-09-10 | 2014-03-13 | Mitsubishi Heavy Industries, Ltd. | Desulfurization device and particulate collection system |
| CN104971612A (en) * | 2015-07-27 | 2015-10-14 | 中钢集团天澄环保科技股份有限公司 | Catalytic cracking flue gas precipitation and desulfuration cooperative treatment process |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107469544A (en) * | 2017-10-09 | 2017-12-15 | 广州舒创有限公司 | Pneumatic emulsifying processing unit and system |
| CN110124503A (en) * | 2019-04-30 | 2019-08-16 | 上海安赐环保科技股份有限公司 | A kind of flue gas demisting dedusting disappears white device and technique |
| CN110124503B (en) * | 2019-04-30 | 2021-10-22 | 上海安赐环保科技股份有限公司 | Flue gas demisting, dedusting and whitening device and process |
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