CN205517190U - Improved generation desulfurization absorption tower - Google Patents

Improved generation desulfurization absorption tower Download PDF

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Publication number
CN205517190U
CN205517190U CN201620080148.5U CN201620080148U CN205517190U CN 205517190 U CN205517190 U CN 205517190U CN 201620080148 U CN201620080148 U CN 201620080148U CN 205517190 U CN205517190 U CN 205517190U
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CN
China
Prior art keywords
level
absorber
subordinate
oxidation
washing
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CN201620080148.5U
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Chinese (zh)
Inventor
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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西安航天源动力工程有限公司
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Priority to CN201620080148.5U priority Critical patent/CN205517190U/en
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Publication of CN205517190U publication Critical patent/CN205517190U/en

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Abstract

The utility model discloses an improved generation desulfurization absorption tower is divided into oxidation crystallized region, subordinate from lower to upper and absorbs section, higher level's section of absorption, sprays washing section and demisting section, and 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 in following the concentration circulating groove by higher level's circulating pump, and 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 certainly, the washing liquid that sprays that sprays the washing section that is arranged in upper portion is washed the pump and is supplied from spraying the sink by following annular spraying drip washing, with return the collecting tank that sprays the washing section after the reverse contact of flue gas after spray the sink from flowing back to, the oxidation crystallized region of desulfurization absorption tower bottom with the bottom in concentration circulating groove is all through a pipe connection oxidation air blower, and the oxygen of oxidation air blower in with the air lets in oxidation crystallized region and concentration circulating groove to carry out the oxidation aeration to ammonium bisulfite solution. The problem of the not good technique of current ammonia desulphurization technology gas cleaning effect is solved.

Description

A kind of modified desulfuration absorbing tower

Technical field

The utility model relates to a kind of ammonia type flue gas desulfurizing technical field, inhales particularly to a kind of modified desulfurization Receive tower.

Background technology

Industrial boiler generally uses fossil fuel, such as coal and oil.Owing to these fossil fuels typically contain The composition of sulphur, therefore, can produce the harmful substances such as sulfur dioxide in combustion.The ammonia process of desulfurization is a kind of Novel desulfurization technology, use ammoniacal liquor ammonia, ammoniacal liquor are as absorbent, owing to the activity of ammonia is high, it is ensured that The highest desulfuration efficiency;The byproduct of the ammonia process of desulfurization is ammonium sulfate fertilizer, has higher economic benefit, is Meet 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 reaction in desulfurizing tower, and by reacted Ammonium sulfate solution is directly discharged in the equipment such as cyclone, centrifuge removing moisture, separates out crystal.Existing device Former flue gas is merely through void tower Multi-layer sprinkling, except mist two procedures scrubbing CO_2, in the neat stress of discharge two Sulfur oxide emissions exceeds 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 modified desulfuration absorbing tower, solves existing ammonia The technical problems such as method desulfurization technology gas cleaning effect is bad, 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 modified desulfuration absorbing tower, is divided into oxidizing and crystallizing section, subordinate's absorber portion, higher level to inhale from lower to upper Receive section, spray washing section and remove mist section,

The sprayed slurry of described subordinate absorber portion is supplied by subordinate's circulating pump, the sprayed slurry of higher level's absorber portion by Higher level's circulating pump is supplied from concentration cycles groove, returns to the liquid collecting of higher level's absorber portion with flue gas after inversely contacting From flowing back to concentration cycles groove after groove;

The spray washing liquid of superposed spray washing section by circulated sprinkling washing pump from spray washing groove Supply, from flowing back to spray washing groove after returning the collecting tank of spray washing section with flue gas after inversely contacting;

Pipeline is all passed through in oxidizing and crystallizing section and the bottom of described concentration cycles groove bottom described desulfuration absorbing tower Connecting an oxidation fan, the oxygen in air is passed through described oxidation fan described oxidizing and crystallizing section and concentration follows Annular groove, to carry out oxidation and aeration to bisulfite ammonium salt solution.

In a preferred embodiment of the present utility model, described subordinate absorber portion be disposed with layer 2-4 spraying layer, The spacing of spraying layer is 1.2m-2.5m;

In a preferred embodiment of the present utility model, described higher level's absorber portion is disposed with layer 2-4 spraying layer, The spacing of spraying layer is 1.2m-2m.

In a preferred embodiment of the present utility model, described subordinate absorber portion is three grades of spraying layers, described Higher level's absorber portion is two grades of spraying layers.

By technique scheme, the beneficial effects of the utility model are:

1, use the mode of hierarchical classification absorption due to desulfuration absorbing tower, greatly improve sulfur dioxide and absorb Efficiency, desulfuration absorbing tower is divided into oxidizing and crystallizing section, subordinate's absorber portion, higher level's absorber portion, spray from top to bottom Washing section, except mist section;

2, higher level and subordinate's absorber portion of desulfuration absorbing tower uses the ridge being made up of multiple semicanals rationally arranged Formula gas-liquid distributor and tower tray, rationally carry out concentration subregion and the temperature subregion of ammonium sulfate slurries, be effectively ensured Optimal absorption environment;

3, the oxidation of the sulfurous acid ammonia of this process system uses at desulfuration absorbing tower bottom oxide and concentration cycles groove The multi-stage oxidizing mode that combines of bottom oxidation with pressure, it is ensured that sulfurous acid ammonia fully oxidized;

4, by the spray scrubber arranged in this process system, effectively flue gas is isolated, it is achieved temperature Degree subregion, ammonium sulfate concentration of slurry subregion, temperature is gradually lowered to tower top by the bottom of tower, ammonium sulfate concentration of slurry It is gradually lowered to tower top by the bottom of tower, thus reduces aerocolloidal purpose.

Accompanying drawing explanation

In order to be illustrated more clearly that the utility model embodiment or technical scheme of the prior art, below by right In embodiment or description of the prior art, the required accompanying drawing used is briefly described, it should be apparent that below, Accompanying drawing in description is only embodiments more of the present utility model, comes for those of ordinary skill in the art Say, on the premise of 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 the utility model realize, creation characteristic, reach purpose and be readily apparent from effect Understand, below in conjunction with being specifically illustrating, the utility model is expanded on further.

With reference to Fig. 1, a kind of modified desulfuration absorbing tower, including: desulfurizing adsorption system, sulphur ammonium dehydration packaging System, the cyclone charging connected with by described desulfurizing adsorption system and described sulphur ammonium dehydration packaging system Pump;

Described desulfurizing adsorption system includes one for the desulfuration absorbing tower 1 of sulfur dioxide absorption;One provides slurries The concentration cycles groove 5 concentrated, slurries are sent into described desulfurization by circulating pump and are absorbed by described concentration cycles groove 5 In tower 1;And one for reducing the spray washing groove 12 of aerosol and the escaping of ammonia, this spray washing groove 12 Spray washing liquid is sent in described desulfuration absorbing tower 1 by logical circulated sprinkling washing pump 11.

Wherein sulphur ammonium dehydration packaging system include the cyclone 10 for improving ammonium sulfate concentration of slurry, be used for into One step improves the centrifuge 9 of ammonium sulfate slurry solid content, for the drying machine to ammonium sulfate solids particle drying 8 and for packing machine 7 that ammonium sulfate is packed;

Described concentration cycles groove 5 is connected with the entrance of cyclone feed pump, cyclone charging delivery side of pump and rotation Stream device 10 charging aperture connect, the discharging opening of cyclone 10 again with centrifuge 9, drying machine 8 and packing machine 7 are sequentially connected with.

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, 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, the spray of higher level's absorber portion 105 Slurries are supplied from concentration cycles groove 5 by higher level's circulating pump 4, return to higher level and inhale after inversely contacting with flue gas From flowing back to concentration cycles groove 5 after receiving the collecting tank of section 105;The spray washing liquid of top spray washing section 106 Supplied from spray washing groove 12 by circulated sprinkling washing pump 11, return spray after inversely contacting with flue gas and wash From flowing back to spray washing groove 12 after the collecting tank of the section of washing 106.Neat stress outlet 108 is arranged at desulfurizing tower 1 top, There is smoke inlet 103 at middle part.

Described sulphur ammonium dehydration packaging system is made up of cyclone 10, centrifuge 9, drying machine 8 and packing machine 7;

Described concentration cycles groove 5 is connected with the entrance of cyclone feed pump 6, the outlet of cyclone feed pump 6 Be connected with the charging aperture of cyclone 10, the discharging opening of cyclone 10 again with centrifuge 9, drying machine 8 and bag Installation 7 is sequentially connected with.

A kind of modified 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, and flue gas is successively Remove sulfur dioxide through three grades of spraying layers, react with ammonia spirit and ammonium sulfite solution, with ammoniacal liquor Solution reaction generates ammonium sulfite, reacts generation ammonium bisulfite with ammonium sulfite solution;

Step 2: the flue gas through step 1 continues to flow above desulfuration absorbing tower 1, enters higher level and absorbs Section 105, flue gas sequentially passes through two grades of spraying layers and removes sulfur dioxide, and the slurries circulated are returned by tower tray Return in concentration cycles groove;Flue gas continues up flowing and through spray washing section and removes mist section, removes in flue gas The fog of ammonia mist, ammonium sulfite and ammonium bisulfite, the neat stress outlet row from desulfuration absorbing tower 1 upper end 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 slurries aoxidized enter concentration cycles groove 5 by agitation cycle pump 2;

Step 4: the ammonium bisulfite/ammonium sulfate generated through step 2 mixes slurry reflux to concentration cycles groove 5 In, bottom concentration cycles groove 5, it is passed through oxidation air, to the sulfurous acid being not fully complete oxidation in concentration cycles groove Ammonium salt solution aoxidizes further, and the ammonium sulfate that oxidation generates is sent into rear end work by cyclone feed pump 6 Process system;

Step 5: the spray washing liquid in step 2 by circulated sprinkling washing pump 11 from spray washing groove 12 Supply to spray washing layer, the aerosol of ammonia mist, ammonium sulfite and ammonium bisulfite in removal flue gas Grain thing;

Step 6: the ammonium sulfate accumulated in concentration cycles groove 5 through step 3 passes back into desulfurization by the road In the cooling concentration section 105 on absorption tower 1, and concentrated pump 4 is sent into the top of cooling concentration section 105 and is carried out Condensing crystallizing, the ammonium sulfate slurries bottom cooling circulating slot 5 send into Ammonium sulfate production system through crystallization pump 6 Produce ammonium sulfate finished product.

Step 7: by cyclone feed pump 6, thiamines slurries are delivered to thiamines cyclone 18 through step 4 and process, Thiamines cyclone underflow centrifuge 19 is separated thiamines crystal, and thiamines crystal eventually falls in drying bed 20, Being dried to obtain the moisture content finished product thiamines less than 1%, finished product thiamines is further dropped in packing machine 7 being packaged into Bag is transported 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 by the upper strata water receiving section of alternate layout 105-1, lower floor's 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 is constituted.

Specifically, upper by alternate layout of the tower tray of desulfurizing tower higher level absorber portion 105 and spray washing section 106 Layer water receiving section 105-1 and lower floor's water receiving section 105-2 complete collection and the reallocation of slurries, are arranged in tower tray Between flat board demister 105-4 complete subordinate's flue gas except mist effect, it is ensured that flue gas does not carry larger particles Entering desulfurizing tower higher level's absorber portion 105 and spray washing section 106, flat board demister 105-4's is arranged above The preventing and treating blocking of flat board mist eliminator flushing section 105-3 periodic flushing, the outside of flat board demister 105-4 is had to arrange Annular water receiving tank 105-6, collects and is relied on gravity certainly by upper strata water receiving section 105-1 and lower floor's water receiving section 105-2 The slurries of stream.

Described desulfurizing tower upper strata water receiving section 105-1 and lower floor's water receiving section 105-2 are respectively by many fiberglass semicanals 105-1-1 and be fixed on by pipe clamp 105-2-1 and carry out antiseptic square tube beam 105-1-2 and 105-2-2 On, flat board demister 105-4 is arranged in upper strata water receiving section 105-1 and the lower section of lower floor's water receiving section 105-2, Being arranged above flat board mist eliminator flushing water section 105-3 at flat board demister 105-4, flat board demister rushes Wash water section 105-3 is mainly responsible for 105-3-1, flushing water arm 105-3-2 and flushing water nozzle by flushing water 105-3-3 forms, and described flushing water supervisor 105-3-1 connects spray liquid, wherein flushing water supervisor 105-3-1 Vertically connecting a connecting pipe, the flushing water arm 105-3-2 of some parallel arrangements the most vertically connects described company Siphunculus.

The operation principle of described desulfurizing tower higher level's absorber portion 105 and spray washing section 106 tower tray is to carry out autospasy The flue gas of Liu Ta subordinate absorber portion 104 passes upper strata water receiving section 105-1 and the gap of lower floor's water receiving section 105-2 Inversely contact with the sprayed slurry supplied by higher level's circulating pump 4, mass-and heat-transfer and occur to enter after chemical reaction Spray washing section 106, sprayed slurry drops down onto upper strata water receiving section 105-1 and lower floor's water receiving section of alternate layout On 105-2, how upper strata water receiving section 105-1 and lower floor's water receiving section 105-2 are by with fiberglass semicanal and square tube horizontal stroke Beam is arranged to the ridge form at certain inclination angle, drops down onto upper strata water receiving section 105-1 and lower floor's water receiving section 105-2 Slurries are by, in flow by gravity to the water receiving tank 105-4 of tower tray exterior annular, finally flowing automatically to concentration from low spot and follow In annular groove 5.

Higher level and subordinate's absorber portion of desulfuration absorbing tower use the ridge being made up of multiple semicanals rationally arranged Formula gas-liquid distributor and tower tray, rationally carry out the dense of ammonium sulfite and hydrogen sulfate ammonia slurries to desulfurizing tower absorber portion Degree subregion and temperature subregion, be effectively ensured optimal absorption environment.

Specifically, flue gas enters from desulfurizing tower gas approach 103, reverse with the slurries of subordinate absorber portion 104 Contact, the slurries containing ammonium sulfite and hydrogen sulfate ammonia and the reverse contact heat-exchanging of high-temperature flue gas, moisture in slurries Evaporation, through constantly circulation, concentration is stepped up forming the slurries that concentration is higher, the most straight with high-temperature flue gas Connecing contact heat-exchanging, the temperature in this region is higher;Flue gas continues to rise through the slurries spray of higher level's absorber portion 105 Drench and absorb, owing to major part SO2 has obtained spray washing absorption at subordinate's absorber portion in flue gas, remain flue gas In SO2 absorb and completed by higher level's absorber portion, therefore the concentration of this layer of loop slurry is relatively low, simultaneously because warp Crossing the spraying cooling effect of subordinate's absorber portion, the flue-gas temperature of the entrance in this region is relatively low, after spray Temperature 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, carries out flue gas clearly after smoke contacts Posterior circle Cleanization, the concentration of this region tower tray is minimum, uses the low temperature process water of spray washing groove to wash simultaneously, The temperature in this region is minimum.To sum up, in desulfurizing tower, concentration and the temperature of slurries 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 uses annular The form of groove.Two-stage ridge type gas-liquid distributor ensure that gas-liquid effectively contact while slurries evenly distribute to In the cannelure of tower tray;The ring channel structures of hollow effectively reduces the resistance of desulfurizing tower.

Of the present utility model general principle and principal character and of the present utility model excellent have more than been shown and described Point.Skilled person will appreciate that of the industry, the utility model is not restricted to the described embodiments, above-mentioned reality Execute and principle of the present utility model is simply described, without departing from the utility model spirit described in example and specification On the premise of scope, the utility model also has various changes and modifications, and these changes and improvements both fall within In the range of claimed the utility model.The utility model claims scope by appending claims And equivalent defines.

Claims (4)

1. a modified 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, from flowing back to concentration cycles groove after returning to the collecting tank of higher level's absorber portion with flue gas after inversely contacting;
The spray washing liquid of superposed spray washing section is supplied from spray washing groove by circulated sprinkling washing pump, from flowing back to spray washing groove after returning the collecting tank of spray washing section with flue gas after inversely contacting;
Oxidizing and crystallizing section and the bottom of described concentration cycles groove bottom described desulfuration absorbing tower all connect an oxidation fan by pipeline, oxygen in air is passed through described oxidizing and crystallizing section and concentration cycles groove by described oxidation fan, so that bisulfite ammonium salt solution is being carried out oxidation and aeration.
A kind of modified desulfuration absorbing tower the most according to claim 1, it is characterised in that described subordinate absorber portion is disposed with layer 2-4 spraying layer, the spacing of spraying layer is 1.2m-2.5m.
A kind of modified desulfuration absorbing tower the most according to claim 2, it is characterised in that described higher level's absorber portion is disposed with layer 2-4 spraying layer, and the spacing of spraying layer is 1.2m-2m.
A kind of modified desulfuration absorbing tower the most according to claim 3, it is characterised in that described subordinate absorber portion is three grades of spraying layers, and described higher level's absorber portion is two grades of spraying layers.
CN201620080148.5U 2016-01-27 2016-01-27 Improved generation desulfurization absorption tower CN205517190U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106823740A (en) * 2017-01-23 2017-06-13 上海大学 Charcoal element stove, the ammonia process of desulfurization of coke oven flue gas multisection type and dedusting absorption tower

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106823740A (en) * 2017-01-23 2017-06-13 上海大学 Charcoal element stove, the ammonia process of desulfurization of coke oven flue gas multisection type and dedusting absorption tower

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