CN205323525U - Hierarchical formula desulfurization absorption tower - Google Patents

Hierarchical formula desulfurization absorption tower Download PDF

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Publication number
CN205323525U
CN205323525U CN201620081188.1U CN201620081188U CN205323525U CN 205323525 U CN205323525 U CN 205323525U CN 201620081188 U CN201620081188 U CN 201620081188U CN 205323525 U CN205323525 U CN 205323525U
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absorber
level
subordinate
sprays
washing
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CN201620081188.1U
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吕文豪
王江辉
杨国华
乔小鹏
李碧云
陈艳艳
苟远波
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Xi'an Aerospace Propulsion Engineering Co Ltd
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Xi'an Aerospace Propulsion Engineering Co Ltd
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Abstract

The utility model discloses a hierarchical formula desulfurization absorption tower divide into oxidation crystallized region, subordinate absorption section, higher level's section of absorption from lower to upper, sprays washing section and demisting section, what the subordinate absorbed the section sprays the thick liquid by subordinate's circulating pump supply, and the thick liquid that sprays of higher level's section of absorption is supplied from the concentration circulating groove by higher level's circulating pump, with oneself flows back to the concentration circulating groove behind the collecting tank that returns higher level's section of absorption after the reverse contact of flue gas, the washing liquid that sprays that sprays the washing section that is arranged in upper portion sprays the washing pump by the circulation and supplies from spraying the sink, the collecting tank that spray washing section after from flow back to sprays sink with returning after the reverse contact of flue gas, technical problem such as solve that present ammonia desulphurization technology gas cleaning effect is not good, aerosol and ammonia escape index exceed standard.

Description

A kind of stagewise desulfuration absorbing tower
Technical field
This utility model relates to a kind of ammonia type flue gas desulfurizing technical field, particularly to a kind of stagewise desulfuration absorbing tower。
Background technology
Industrial boiler generally adopts Fossil fuel, such as coal and oil。Owing to these Fossil fuels typically contain the composition of sulfur, therefore, the harmful substances such as sulfur dioxide can be produced in combustion。The ammonia process of desulfurization is a kind of novel desulfurization technology, uses ammoniacal liquor ammonia, ammonia as absorbent, owing to the activity of ammonia is high, it is ensured that significantly high desulfuration efficiency;The side-product of the ammonia process of desulfurization is ammonium sulfate fertilizer, has higher economic benefit, is consistent with a kind of technique of recycling economy, sustainable development requirement。
In the conventional tower intercrystalline ammonia process of desulfurization, former flue gas is directly entered in desulfurizing tower and reacts, and is directly discharged into by reacted ammonium sulfate solution in the equipment such as cyclone, centrifuge and removes moisture, precipitation crystal。The former flue gas of existing device is merely through void tower Multi-layer sprinkling, except mist two procedures scrubbing CO_2, and in the neat stress of discharge, sulfur dioxide (SO2) emissions exceed standard, and aerosol and the escaping of ammonia index are difficult to meet requirement。
Utility model content
The technical problems to be solved in the utility model is to provide a kind of stagewise desulfuration absorbing tower, solves that existing ammonia-process desulfurization technique gas cleaning effect is bad, the technical problem such as aerosol and the escaping of ammonia index exceeding standard。
For reaching above-mentioned purpose, the technical solution of the utility model is as follows:
A kind of stagewise desulfuration absorbing tower, is divided into oxidizing and crystallizing section, subordinate's absorber portion, higher level's absorber portion, spray washing section from lower to upper and removes mist section,
The sprayed slurry of described subordinate absorber portion is supplied by subordinate's circulating pump, and the sprayed slurry of higher level's absorber portion is supplied from concentration cycles groove by higher level's circulating pump, reverse with flue gas contact after return to the collecting tank of higher level's absorber portion after from flowing back to concentration cycles groove;
The spray washing liquid of superposed spray washing section is supplied from spray washing groove by circulated sprinkling washing pump, reverse with flue gas contact after return after the collecting tank of spray washing section from flowing back to spray washing groove。
In a preferred embodiment of the present utility model, described desulfurizing tower top has neat stress to export, and is provided with smoke inlet between described oxidizing and crystallizing section and described subordinate absorber portion。
In a preferred embodiment of the present utility model, subordinate's absorber portion of described desulfuration absorbing tower and higher level's absorber portion mutual spacing certain distance。
By technique scheme, the beneficial effects of the utility model are:
1, owing to desulfuration absorbing tower adopts the mode of hierarchical classification absorption, greatly improving sulfur dioxide absorption efficiency, desulfuration absorbing tower is divided into oxidizing and crystallizing section, subordinate's absorber portion, higher level's absorber portion, spray washing section from top to bottom, except mist section;
2, the higher level of desulfuration absorbing tower and subordinate absorber portion adopt the ridge type gas-liquid distributor being made up of multiple semicanals and tower tray that rationally arrange, rationally carry out concentration subregion and the temperature subregion of ammonium sulfate serosity, have been effectively ensured the absorption environment of the best;
3, the oxidation of the sulfurous acid ammonia of this process system adopts the multi-stage oxidizing mode that combines at desulfuration absorbing tower bottom oxide and the oxidation with pressure of concentration cycles trench bottom, it is ensured that sulfurous acid ammonia fully oxidized;
4, by the spray scrubber of setting in this process system, effectively flue gas is isolated, it is achieved temperature subregion, ammonium sulfate concentration of slurry subregion, temperature is gradually lowered to tower top by the bottom of tower, and ammonium sulfate concentration of slurry is gradually lowered to tower top by the bottom of tower, thus reducing aerocolloidal purpose。
Accompanying drawing explanation
In order to be illustrated more clearly that this utility model embodiment or technical scheme of the prior art, the accompanying drawing used required in embodiment or description of the prior art will be briefly described below, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the premise not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings。
Fig. 1 is flow sheet of the present utility model。
Fig. 2 is the schematic diagram of the front view of tower tray of the present utility model。
Fig. 3 is the schematic diagram of the left view of tower tray of the present utility model。
Fig. 4 is tower tray A-A sectional view of the present utility model。
Fig. 5 is tower tray B-B sectional view of the present utility model。
Fig. 6 is tower tray mist eliminator flushing water layout drawing of the present utility model。
Detailed description of the invention
For the technological means making this utility model realize, creation characteristic, reach purpose and effect and be easy to understand, below in conjunction with being specifically illustrating, this utility model is expanded on further。
With reference to Fig. 1, a kind of stagewise desulfuration absorbing tower, including: desulfurizing adsorption system, sulfur ammonium dehydration packaging system, the cyclone feed pump connected with by described desulfurizing adsorption system and described sulfur ammonium dehydration packaging system;
Described desulfurizing adsorption system includes one for the desulfuration absorbing tower 1 of sulfur dioxide absorption;The one concentration cycles groove 5 providing serosity concentration, serosity is sent in described desulfuration absorbing tower 1 by described concentration cycles groove 5 by circulating pump;And one for reducing the spray washing groove 12 of aerosol and the escaping of ammonia, this spray washing groove 12 leads to circulated sprinkling washing pump 11 to be sent into spray washing liquid in described desulfuration absorbing tower 1。
Wherein sulfur ammonium dehydration packaging system includes the cyclone 10 for improving ammonium sulfate concentration of slurry, for improving the centrifuge 9 of ammonium sulfate slurry solid content further, for the drying machine 8 of ammonium sulfate solids particle drying and the packer 7 for ammonium sulfate is packed;
Described concentration cycles groove 5 is connected with the entrance of cyclone feed pump, and cyclone charging delivery side of pump is connected with the charging aperture of cyclone 10, and the discharging opening of cyclone 10 is sequentially connected with centrifuge 9, drying machine 8 and packer 7 again。
Described desulfurizing tower 1 bottom arranges oxidizing and crystallizing section 102, and middle part arranges desulfurizing tower subordinate absorber portion 104 and higher level's absorber portion 105, and top arranges spray washing section 106 and desulfurizer mist eliminator 107;
The sprayed slurry of subordinate's absorber portion 104 is supplied by subordinate's circulating pump 3, and the sprayed slurry of higher level's absorber portion 105 is supplied from concentration cycles groove 5 by higher level's circulating pump 4, reverse with flue gas contact after return to the collecting tank of higher level's absorber portion 105 after from flowing back to concentration cycles groove 5;The spray washing liquid of top spray washing section 106 is supplied from spray washing groove 12 by circulated sprinkling washing pump 11, reverse with flue gas contact after return after the collecting tank of spray washing section 106 from flowing back to spray washing groove 12。Neat stress outlet 108 is arranged at desulfurizing tower 1 top, and there is smoke inlet 103 at middle part。
Described sulfur ammonium dehydration packaging system is made up of cyclone 10, centrifuge 9, drying machine 8 and packer 7;
Described concentration cycles groove 5 is connected with the entrance of cyclone feed pump 6, and the outlet of cyclone feed pump 6 is connected with the charging aperture of cyclone 10, and the discharging opening of cyclone 10 is sequentially connected with centrifuge 9, drying machine 8 and packer 7 again。
A kind of stagewise desulfuration absorbing tower, comprises the following steps:
Step 1: flue gas enters subordinate's absorber portion 104 of desulfuration absorbing tower 1 through smoke inlet, flue gas sequentially passes through three grades of spraying layers and removes sulfur dioxide, react with ammonia spirit and ammonium sulfite solution, react generation ammonium sulfite with ammonia spirit, react generation ammonium bisulfite with ammonium sulfite solution;
Step 2: the flue gas through step 1 continues to flow above to desulfuration absorbing tower 1, enters higher level's absorber portion 105, and flue gas sequentially passes through two grades of spraying layers and removes sulfur dioxide, and the serosity circulated is returned in concentration cycles groove by tower tray;Flue gas continues up flowing through spray washing section with except mist section, removes the fog of the ammonia mist in flue gas, ammonium sulfite and ammonium bisulfite, exports from the neat stress of desulfuration absorbing tower 1 upper end and enter air;
Step 3: the bisulfite ammonium salt solution generated through step 1 carries out oxidation and aeration bottom desulfurizing tower 1, the ammonium sulfate serosity aoxidized enters concentration cycles groove 5 by agitation cycle pump 2;
Step 4: the mixed slurry reflux of ammonium bisulfite/ammonium sulfate generated through step 2 is in concentration cycles groove 5, oxidation air is passed into bottom concentration cycles groove 5, the ammonium sulfite solution being not fully complete oxidation in concentration cycles groove is aoxidized further, and the ammonium sulfate that oxidation generates is sent into backend process system by cyclone feed pump 6;
Step 5: the spray washing liquid in step 2 is supplied to spray washing layer by circulated sprinkling washing pump 11 from spray washing groove 12, removes the aerosol particle thing of the ammonia mist in flue gas, ammonium sulfite and ammonium bisulfite;
Step 6: the ammonium sulfate accumulated in concentration cycles groove 5 through step 3 passes back in the cooling concentration section 105 of desulfuration absorbing tower 1 by the road, and the top that cooling concentration section 105 sent into by concentrated pump 4 carries out condensing crystallizing, the ammonium sulfate serosity bottom cool cycles groove 5 is sent into Ammonium sulfate production system through crystallization pump 6 and is produced ammonium sulfate finished product。
Step 7: by cyclone feed pump 6, thiamine serosity is delivered to thiamine cyclone 18 through step 4 and process, thiamine cyclone underflow centrifuge 19 is separated thiamine crystal, thiamine crystal eventually falls in drying bed 20, drying and obtain the moisture content finished product thiamine lower than 1%, finished product thiamine is further dropped into packer 7 intermediate package and becomes bag to transport outward。
In order to further illustrate desulfuration absorbing tower inner workings:
The tower tray of desulfurizing tower higher level's absorber portion 105 and spray washing section 106 is made up of the upper strata water receiving section 105-1 of alternate layout, lower floor water receiving section 105-2, flat board mist eliminator flushing water section 105-3, flat board demister 105-4 and annular water receiving tank 105-5。
Specifically, the tower tray of desulfurizing tower higher level's absorber portion 105 and spray washing section 106 is completed collection and the reallocation of serosity by the upper strata water receiving section 105-1 and lower floor water receiving section 105-2 of alternate layout, be arranged in the flat board demister 105-4 in the middle of tower tray complete subordinate's flue gas except mist effect, ensure that flue gas does not carry larger particles and enters desulfurizing tower higher level's absorber portion 105 and spray washing section 106, flat board demister 105-4 is arranged above the preventing and treating blocking of flat board mist eliminator flushing section 105-3 periodic flushing, the arranged outside annular water receiving tank 105-6 of flat board demister 105-4, collect the serosity being relied on flow by gravity by upper strata water receiving section 105-1 and lower floor water receiving section 105-2。
Described desulfurizing tower upper strata water receiving section 105-1 and lower floor water receiving section 105-2 is respectively by many fiberglass semicanal 105-1-1 and be fixed on by pipe clamp 105-2-1 and carry out on antiseptic square tube beam 105-1-2 and 105-2-2, flat board demister 105-4 is arranged in upper strata water receiving section 105-1 and the lower section of lower floor water receiving section 105-2, it is arranged above flat board mist eliminator flushing water section 105-3 at flat board demister 105-4, flat board mist eliminator flushing water section 105-3 is mainly responsible for 105-3-1 by flushing water, flushing water arm 105-3-2 and flushing water nozzle 105-3-3 composition, described flushing water supervisor 105-3-1 connects spray liquid, wherein flushing water supervisor 105-3-1 vertically connects a connecting pipe, the flushing water arm 105-3-2 of some parallel arrangements equally vertically connects described communicating pipe。
The operation principle of described desulfurizing tower higher level's absorber portion 105 and spray washing section 106 tower tray is, contact from the flue gas of desulfurizing tower subordinate absorber portion 104 is reverse with the sprayed slurry supplied by higher level's circulating pump 4 through the gap of upper strata water receiving section 105-1 and lower floor water receiving section 105-2, spray washing section 106 is entered after mass-and heat-transfer and generation chemical reaction, sprayed slurry drops down onto on the upper strata water receiving section 105-1 and lower floor water receiving section 105-2 of alternate layout, upper strata water receiving section 105-1 and lower floor water receiving section 105-2 is by many ridge forms being arranged to certain inclination angle with fiberglass semicanal and square tube beam, the serosity dropping down onto upper strata water receiving section 105-1 and lower floor water receiving section 105-2 leans on flow by gravity in the water receiving tank 105-4 of tower tray exterior annular, finally flow automatically to concentration cycles groove 5 from low spot。
The higher level of desulfuration absorbing tower and subordinate's absorber portion adopt the ridge type gas-liquid distributor being made up of multiple semicanals and tower tray that rationally arrange, rationally desulfurizing tower absorber portion is carried out concentration subregion and the temperature subregion of ammonium sulfite and hydrogen sulfate ammonia serosity, has been effectively ensured the absorption environment of the best。
Specifically, flue gas enters from desulfurizing tower gas approach 103, reverse with the serosity of subordinate absorber portion 104 contact, serosity containing ammonium sulfite and hydrogen sulfate ammonia and the reverse contact heat-exchanging of high-temperature flue gas, moisture evaporation in serosity, through constantly circulation, concentration is stepped up forming the serosity that concentration is higher, simultaneously with high-temperature flue gas direct contact heat transfer, the temperature in this region is higher;Flue gas continues to rise through the serosity spray-absorption of higher level's absorber portion 105, owing in flue gas, major part SO2 has obtained spray washing absorption at subordinate's absorber portion, SO2 in residue flue gas absorbs and is completed by higher level's absorber portion, therefore the concentration of this layer of loop slurry is relatively low, simultaneously because through the spraying cooling effect of subordinate's absorber portion, the flue-gas temperature of the entrance in this region is relatively low, and the temperature after spray reduces further;After higher level's absorber portion 105, flue gas continues to ascend into spray washing section 106, the circulated sprinkling liquid in this region comes from spray washing groove 12, with after smoke contacts Posterior circle, flue gas is carried out purify, the concentration of this region tower tray is minimum, using the low temperature process water of spray washing groove to wash, the temperature in this region is also minimum simultaneously。To sum up, in desulfurizing tower, the concentration of serosity and temperature gradually reduce from the bottom up。
Described gas-liquid distributor have employed the form of two-stage ridge type gas-liquid distributor, and affiliated tower tray adopts the form of cannelure。Two-stage ridge type gas-liquid distributor ensure that gas-liquid effectively contact while serosity uniform distribution to the cannelure of tower tray;The ring channel structures of hollow effectively reduces the resistance of desulfurizing tower。
Of the present utility model ultimate principle and principal character and of the present utility model advantage have more than been shown and described。Skilled person will appreciate that of the industry; this utility model is not restricted to the described embodiments; described in above-described embodiment and description is that principle of the present utility model is described; under the premise without departing from this utility model spirit and scope; this utility model also has various changes and modifications, and these changes and improvements both fall within the scope of claimed this utility model。This utility model claims scope and is defined by appending claims and equivalent thereof。

Claims (3)

1. a stagewise desulfuration absorbing tower, it is characterised in that be divided into oxidizing and crystallizing section, subordinate's absorber portion, higher level's absorber portion, spray washing section from lower to upper and remove mist section,
The sprayed slurry of described subordinate absorber portion is supplied by subordinate's circulating pump, and the sprayed slurry of higher level's absorber portion is supplied from concentration cycles groove by higher level's circulating pump, reverse with flue gas contact after return to the collecting tank of higher level's absorber portion after from flowing back to concentration cycles groove;
The spray washing liquid of superposed spray washing section is supplied from spray washing groove by circulated sprinkling washing pump, reverse with flue gas contact after return after the collecting tank of spray washing section from flowing back to spray washing groove。
2. a kind of stagewise desulfuration absorbing tower according to claim 1, it is characterised in that described desulfurizing tower top has neat stress to export, and is provided with smoke inlet between described oxidizing and crystallizing section and described subordinate absorber portion。
3. a kind of stagewise desulfuration absorbing tower according to claim 1, it is characterised in that subordinate's absorber portion of described desulfuration absorbing tower and higher level's absorber portion mutual spacing certain distance。
CN201620081188.1U 2016-01-27 2016-01-27 Hierarchical formula desulfurization absorption tower Active CN205323525U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201620081188.1U CN205323525U (en) 2016-01-27 2016-01-27 Hierarchical formula desulfurization absorption tower

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201620081188.1U CN205323525U (en) 2016-01-27 2016-01-27 Hierarchical formula desulfurization absorption tower

Publications (1)

Publication Number Publication Date
CN205323525U true CN205323525U (en) 2016-06-22

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Country Status (1)

Country Link
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