CN105238904B - A kind of flue gas of converter is based on transpiration-cooled low energy consumption semidry method dust pelletizing system - Google Patents

A kind of flue gas of converter is based on transpiration-cooled low energy consumption semidry method dust pelletizing system Download PDF

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Publication number
CN105238904B
CN105238904B CN201510787768.2A CN201510787768A CN105238904B CN 105238904 B CN105238904 B CN 105238904B CN 201510787768 A CN201510787768 A CN 201510787768A CN 105238904 B CN105238904 B CN 105238904B
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water
flue gas
circumferential weld
export
spraying
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CN105238904A (en
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陈振华
管序荣
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Jiangsu Boji Spraying Systems Holding Co Ltd
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Jiangsu Boji Spraying Systems Holding Co Ltd
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00Technologies related to metal processing
    • Y02P10/25Process efficiency

Abstract

The present invention relates to a kind of flue gases of converter to be based on transpiration-cooled low energy consumption semidry method dust pelletizing system.Evaporation including being connect with gasification cooling flue cools down scrubbing tower, spraying spray circumferential weld washing dehydration integrated tower and the horizontal cyclone dehydrator being connected with fans entrance pipe network, evaporation cooling scrubbing tower lower end is equipped with air-water separation chamber, gas-water separation chamber outlet end is connected with upstriker eddy flow moisture film dust removing tube input end, the upstriker eddy flow moisture film dust removing tube port of export is connect with spraying spray circumferential weld washing dehydration integrated tower input end by flue, the spraying spray circumferential weld washing dehydration integrated tower port of export passes through connecting pipe and the tangent connection of the two with dehydrating tower arrival end, evaporation cooling scrubbing tower, spraying spray circumferential weld washing dehydration integrated tower and dehydrating tower are equipped with a circular water treating system altogether.The present invention can meet tighter dust emission standard or requirement, promote the quality of gas recovery, reduce cooling dust-water treatment amount, reduce energy consumption, improve reliability, the safety of system operation.

Description

A kind of flue gas of converter is based on transpiration-cooled low energy consumption semidry method dust pelletizing system
Technical field
The present invention relates to flue gases of a kind of dust pelletizing system more particularly to a kind of converter to be based on transpiration-cooled low energy consumption half Dry-dedusting system belongs to prevention and control of air pollution and flue gas cooling and dedusting technical field.
Background technology
Environmental issue has become a key factor for restricting China's steel and iron industry sustained and coordinated development.October 1 in 2012 Day acts what is implemented《Steel and iron industry great Qi pollution dye object discharge marks Huaihe River》(GB28664-2012), steel-making enterprise is defined more stringent Great Qi pollution dye object emission control requirements and limit value.On 2 27th, 2013, country determined that steel, the industries such as cement will be again Different periods start to perform the special emission limit of atmosphere pollution, start on January 1st, 2015, newly-built or existing enterprise, Its concentration of emission must all reach 50mg/m3 hereinafter, on 2 27th, 2013, and country determines steel, cement when industries when different Section starts to perform the special emission limit of atmosphere pollution;According to the trend that Environmental quality requirement is more and more stringent, at present Enterprise's internal control smoke dust discharge concentration is scheduled below 30mg/Nm3 by more city and enterprise.Most tight new environmental law in China's history It has begun to implement from January 1st, 2015, followed by, various regions will successively according to various refinement policies that new environmental law is worked out It puts into effect.
Current environmental protection pollution treatment is in the critical period for solving the problems, such as the old and new, as one of important pollution sources of iron and steel enterprise Pneumatic steelmaking link, the discharge of flue gas particles of converter is the dye object object exhausting control source being especially included in national standard. How enterprise selects suitable treatment process, realize the efficiency liter of converter gas purification and recovery process technology according to actual conditions Grade, it has also become the hot spot and focus of iron and steel enterprise's modern converter steel-making energy-saving and emission-reduction.
Converter generates a large amount of high-temperature gas in oxygen blast smelting process, and converter gas has that high temperature, flow be big, dustiness The features such as more, toxic and explosive, the main oxides CO contents of carbon are averagely about during using unburned method gas recovery, in furnace gas Account for 70%.When blowing simultaneously, due to the evaporation of iron, acute row stirring, the explosion of CO bubbles and the splash of air-flow etc. under high temperature action A variety of causes generates a large amount of stove dirt, and total amount is about the 1%-2% of metal charge, and about 10%--20Kg/t steel, stove dirt are mainly The dust such as FeO, Fe2O3, CaO, SiO2, dustiness are about 80-150g/Nm3.Its grain size is largely when furnace gas is unburned 10 More than m, then most of after furnace gas burning is 1M is hereinafter, opposite trapping difficulty is big.
Converter current (flue gas) gas purification mainly has complete wet OG methods, semidry method with recovery system gas cleaning mode The forms such as (dry and wet combination) and dry method LT methods, more than 70% converter gas purification and recovery process being currently running is with Japanese OG Method technique is wet-scrubbing equipment, that is, usual wet method OG of representative.
It introduces in recent years and digests the wet method saturator text gas purification of transplanting and recovery system, that is, novel OG technologies, mainly Two literary aditus laryngis are improved, R--D, PA class Venturi tube are changed to the adjustable annular gap scrubber of heavy mound type, while cancel-text, instead Saturation cooling tower, technology maturation, process equipment is simple, easy to operate, particularly in terms of technology controlling and process, is automatically or manually controlled It is all very safe and reliable.
But its shortcoming is also apparent from:The new OG wet method systems resistance damage usually split is still high:Blower press leads in actual use Often reach 22KPa--24 KPa;System water amount is big, and mating water treatment facilities are huge;Maintenance of equipment amount is big, operating cost It is high.
The dehydrator of usual OG wet method systems is washed with tower text and process water is same circulating water treatment water system. Reuse recirculated water suspended matter mass concentration is required usually beyond 150mg/L in actual moving process, in many cases even > 250mg/L。
The costs and poor dehydration results of usual OG wet method systems, flue gas is just constantly in wet saturation state, aqueous vapor point since tower text Poor from effect, free water content is high, and drop and flushing water droplet formation are largely washed using soot dust granule object as the nuclei of condensation in flue gas Free water mist, diffused with flue gas output, usual OG wet method systems made to form resistance high, but efficiency of dust collection be difficult to improve it is stupid Disease.Smoke dust discharge concentration is usually in 80mg/Nm3--100mg/Nm3Between and it is unstable, it is difficult to adapt to more and more stringent country Atmosphere pollutants emission standards.
In order to adapt to new national atmosphere pollutants emission standards, appearance in recent years-a little new OG systems such as Ta-towers- Text-dehydrating tower, but its technological process is long, occupied space is big, bend is more, resistance damage is big, water consumption is big but efficiency of dust collection is difficult to carry It is high.
It introduces in recent years and digests the wet method saturator text gas purification of transplanting and recovery system, that is, novel OG technologies, tower Type is split, but for washing integrated tower or tower text at application process-aspect by original across space institute of part workshop converter height Limit, it is impossible to meet evaporation cooling circumferential weld washing integrated tower by dress height, on the other hand, converter current steel making working procedure toward live due to Converter smelting operating mode, which exists, re-blows, fire door slagging, and iron ore, furnace charge, cooling agent etc. enter stove furnace charge relative mistake, into system cigarette Gas dust content is high, and preposition cooling cleaning dust grade dust-collection efficiency is low, so as to which the total efficiency of dust collection of dust pelletizing system is difficult to improve.It is right It is most of to use OG method gas purification and recovery process, to meet stringenter energy-saving and emission-reduction requirement, it is each to improve dust pelletizing system The grade dust-collection efficiency of composition is crux.
Invention content
In view of the foregoing drawbacks, the purpose of the present invention is to provide a kind of flue gases of converter to be based on transpiration-cooled low energy consumption Semidry method dust pelletizing system, based on transpiration-cooled principle, by special process section, using double-current spray gun body, pressure water mist Spray gun and flue gas cyclone technique improve high-temperature flue gas water mist evaporation cooldown rate and efficiency of dust collection, by concatenating recirculated water on the spot Processing system using High-efficiency grey water isolation technics, improves concatenation water supply quality and water, effectively prevent the obstruction of spray generator Etc. accidents, so as to reach water-saving and electricity-saving, gas recovery system low energy consumption safe operation passes through and improves cooling, dedusting, dewatering system Each component units classification efficiency, so as to improve total efficiency of dust collection of dust pelletizing system, disclosure satisfy that converter coal gas purification recycle The higher dust emission standard of system or requirement promote the quality of gas recovery, reduce cooling dust-water treatment amount, reduce energy Consumption improves reliability, the safety of system operation.
The technical solution adopted in the present invention is thus:
Including connect with gasification cooling flue evaporation cooling scrubbing tower, spraying spray circumferential weld washing dehydration integrated tower and with The horizontal cyclone dehydrator that fans entrance pipe network is connected, the lower end of the evaporation cooling scrubbing tower are equipped with air-water separation chamber, institute The port of export for stating air-water separation chamber is connected with the input end of upstriker eddy flow moisture film dust removing tube, upstriker eddy flow moisture film dust removing tube The port of export with spraying spray circumferential weld washing dehydration integrated tower input end connect by flue, it is described spraying spray circumferential weld The port of export of washing dehydration integrated tower is connected with the arrival end of horizontal cyclone dehydrator, the spraying spray circumferential weld washing dehydration Integrated tower concatenates circular water treating system on the spot equipped with one;
The evaporation cooling scrubbing tower is divided into twoth area up and down, and upper area is evaporation cooling and dedusting area, and lower area is washed for spraying spray Area is washed, if being equipped with dried layer two-fluid spray gun or double-current spray gun body and one-way or bi-directional pressure water fog spraying gun in evaporation cooling and dedusting area The combination of I, if being equipped with the one-way or bi-directional pressure water fog spraying gun II of dried layer in spraying spray washing area;
The double fluid spray gun body includes two-fluid spray nozzle, water supply supply air line and the gas supply control unit that supplies water, gas selection Nitrogen or steam are other with certain pressure inert gas;
One-way or bi-directional pressure water fog spraying gun I and one-way or bi-directional pressure water fog spraying gun II includes hollow or solid height Imitate atomizer, water supply pipe and water circulation unit;
It is described if being equipped with the downward unidirectional spray gun I in dried layer direction in the upstriker eddy flow moisture film dust removing tube from top to bottom Upstriker eddy flow moisture film dust removing tube outer wall is equipped with liquid film overflow launder, and the liquid film overflow launder is located at below flue, described Liquid film overflow launder is equipped with water inlet pipe;
Twoth area up and down are classified as by inclined clapboard in the spraying spray circumferential weld washing dehydration integrated tower, upper area is aerosol Mixed flow dedusting area, lower area are combination region, and the combination region top is divided into dehydrating demisting area, and lower part is gravity dewatering zone, described It is connected between aerosol mixed flow dedusting area and combination region by flue gas diversion pipe, the aerosol mixed flow dedusting area Nei Yanta centers are from upper And if be arranged with the downward unidirectional spray gun II in dried layer direction, equipped with adjustable circumferential weld weight washer and flue gas in the combination region Diversion pipe lower end connects, and the shell of adjustable circumferential weld weight washer and the annular space that inclined clapboard is formed are eddy flow drying zone, institute It states and nozzle rotation mixed flow generator is equipped with right over flue gas diversion pipe axle center, the nozzle rotation mixed flow generator and flue gas water conservancy diversion One layer of unidirectional hydraulic spray nozzle is equipped between pipe, the unidirectional hydraulic spray nozzle direction is downward along flue gas diversion pipe axle center;
The shell of the adjustable circumferential weld weight washer and the annular space that inclined clapboard is formed are eddy flow drying zone, the rotation If if it is equipped with the export-oriented dedusting dehydration spiral board of dried layer and the export-oriented dehydrating demisting rotation of dried layer in stream drying zone successively from bottom to top Flowing plate, the export-oriented dehydrating demisting spiral board upper and lower ends are respectively equipped with two-way gap and rinse water fog spraying gun, described export-oriented Dedusting dehydration spiral board upper and lower ends are respectively equipped with two-way normally opened water fog spraying gun;
The port of export of the spraying spray circumferential weld washing dehydration integrated tower is located at below inclined clapboard;
The horizontal cyclone dehydrator includes smoke-intake pipe road, smoke pipeline, dehydrator and export-oriented dehydration spiral board, described Dehydrator is tube structure, and the entrance in the smoke-intake pipe road is connect with the port of export of spraying spray circumferential weld washing dehydration integrated tower, The outlet in the smoke-intake pipe road and the entrance of smoke pipeline are located in dehydrator and in same level, the dehydrator lower end Equipped with liquid collecting bucket, export-oriented dehydration spiral board is equipped in the smoke-intake pipe road, the export-oriented dehydration spiral board is located at smoke-intake pipe The exit in road is provided with the unidirectional spray gun III of dehydrator in front of the export-oriented dehydration spiral board;
The lower end of the air-water separation chamber, spraying spray circumferential weld washing dehydration integrated tower and dehydrator is respectively equipped with self-cleaning In water lute drainer I, self-cleaning water lute drainer II and self-cleaning water lute drainer III, the self-cleaning water lute drainer I Buck is directly discharged into overhead chute by buck comb;
The circular water treating system of concatenation on the spot includes hydraulic cyclone seperator of ash and water, the hydraulic cyclone Ash Water Separator Device is connect by buck comb with self-cleaning water lute drainer II and self-cleaning water lute drainer III, the spraying spray circumferential weld The lower end outside of the aerosol mixed flow dedusting area of washing dehydration integrated tower is connect by buck comb with self-cleaning water lute drainer II, The middle part of the hydraulic cyclone seperator of ash and water is connect by reuse water pump with pumping station system, and pumping station system is by return pipe with steaming The one-way or bi-directional pressure water fog spraying gun II connections felt cold in but scrubbing tower, pumping station system are revolved by backwashing return pipe with waterpower The upper end connection of seperator of ash and water is flowed, the lower end of hydraulic cyclone seperator of ash and water is connect by blow-off pipe with overhead chute.
Further, the evaporation cooling scrubbing tower passes through overflow water seal or Non-Metallic Expansion Joints and gasification cooling flue End connection.
Further, the flue is located at the top of the inclined clapboard in spraying spray circumferential weld washing dehydration integrated tower, when When the port of export of flue is located between the arrival end and inclined clapboard of flue gas diversion pipe, the inlet end and an outlet end of flue The tangent company of input end of circumferential weld washing dehydration integrated tower is sprayed with the port of export of upstriker eddy flow moisture film dust removing tube and spraying respectively It connects, when the port of export of flue is located at the arrival end top of flue gas diversion pipe, input end and the upstriker of flue revolve The tangent connection of flowing water film dust removing tube, the input end radial direction of the port of export and spraying spray circumferential weld washing dehydration integrated tower of flue Connection.
Further, the adjustable circumferential weld weight washer is watched including adjustable annular gap scrubber ontology, liftable heavily cutting, hydraulic pressure Take mechanism and guide rod.
Further, the nozzle rotation mixed flow generator includes anchor tip, core bar, rotary nozzle and fin, the core Bar is inscribed in anchor tip inner cavity, and core bar lower end passes through anchor tip, and core bar lower end outer circle is cased with transit joint, transit joint Lower end outer circle socket rotary nozzle, is connected to equipped with sleeve on anchor tip inner wall, core bar between core bar and anchor tip inner wall Upper end is equipped with boss, and ball I is equipped between boss lower surface and sleeve upper end, is equipped between transit joint upper end and core bar outer wall Groove, groove is interior to be equipped with ball II, and two fins, rotary nozzle side wall upper edge Inner chamber side walls are arranged on rotary nozzle side wall Tangent line is arranged with eccentric linear plug-flow spout and between two fin, and rotary nozzle lower end is equipped with water fog applicator.
Further, the upper end of the hydraulic cyclone seperator of ash and water is connect equipped with overflow pipe with overhead chute, the waterpower The lower end of eddy flow seperator of ash and water is equipped with mud discharging mouth, and spoil disposal conveyer is equipped at the mud discharging mouth.
Further, the unidirectional spray gun I, unidirectional spray gun II, unidirectional spray gun III are double-current spray gun body or double-current spray gun body With the combination of pressure water fog spraying gun.
Further, nozzle rotation mixed flow generator by the negative pressure of flue gas diversion pipe to adjustable circumferential weld weight washer Aditus laryngis and liftable heavily cutting convey good antiscale property seasoning liquid and flocculating agent online, it is effective by the chelating of antisludging agent, peptizaiton The fouling for preventing adjustable circumferential weld weight washer aditus laryngis and liftable heavily cutting occurs, and is washed so as to promote and stablize adjustable circumferential weld weight Refined dedusting and temperature reduction performance of the device to flue gas are washed, while the flocculating agent added in makes to be discharged into the buck hair of hydraulic cyclone seperator of ash and water Raw flocculation accelerates cohesion, centrifugation, concentration and sedimentation in hydraulic cyclone seperator of ash and water.
Further, the double-current spray gun body includes two-fluid spray nozzle, water supply supply air line and supplies water to supply control unit, gas Body selection nitrogen or steam are other with certain pressure inert gas.
Further, the pressure water fog spraying gun includes hollow or solid high-efficiency atomizing nozzle, water supply pipe and for water management Unit.
Further, described its water inlet pipe of liquid film overflow launder tangentially enters overflow launder along liquid film overflow launder circle, and overflow launder passes through The horizontal downflow weir overflow of tooth form, make on the tube wall circumference in upstriker eddy flow moisture film dust removing tube formed one layer very thin it is continuous downwards The moisture film of Uniform Flow, the wall stream and water that the pressure water mist that unidirectional spray gun I sprays is formed under the action of rotating centrifugal climbing power Film collects, and ash-laden gas sprays the negative of circumferential weld washing dehydration integrated tower gas approach importing under blower negative pressure effect by spraying Pressure generates rotation climbing power, and the moistening travel fatigue that inward wall is got rid of by centrifugal force effect is adhered to by moisture film, and lower end row is flowed to along inner wall It walks.
Further, the wall stream formed under the action of rotating centrifugal climbing power in the upstriker eddy flow moisture film dust removing tube can Be individually using the wall stream that is formed under the action of rotating centrifugal climbing power of pressure water mist of pressure water fog spraying gun injection or The moisture film wall stream of continuous downward Uniform Flow individually formed using the horizontal downflow weir overflow of overflow launder tooth form.
Further, the hydraulic cyclone seperator of ash and water is made of, water the cylinder and lower part of upper hollow for vertebral body The upper end inner wall circumference of power eddy flow seperator of ash and water is equipped with inclined arc shaped rotary stream guide groove.
Further, the buck of collection is discharged into hydraulic cyclone seperator of ash and water along buck comb waterpower, and water-drop point is tilting Arc shaped rotary stream guide groove upper end, buck pours hydraulic cyclone in the inclined arc shaped rotary stream guide groove rotary-cut of hydraulic action lower edge Seperator of ash and water, generate hydraulic cyclone tangentially drive buck in hydraulic cyclone seperator of ash and water along barrel rotation and Generate centrifugal force, shown nozzle rotation mixed flow generator is by the negative pressure of flue gas diversion pipe to the larynx of adjustable circumferential weld weight washer Mouth and liftable heavily cutting convey good antiscale property seasoning liquid and flocculating agent online, on the one hand effectively prevent adjustable circumferential weld weight washer larynx The fouling of mouth and liftable heavily cutting occurs, and spraying spray circumferential weld washing dehydration integrated tower is on the other hand made to be discharged into hydraulic cyclone on the spot The buck of seperator of ash and water flocculates, and under gravitational and centrifugal forces, thicker, the heavier particulate matter sedimentation of cohesion is simultaneously Concentrated and settled in the vertebral body of hydraulic cyclone seperator of ash and water, the plaster of concentration by by spoil disposal conveyer send to Converter plaster comprehensive reutilization point, supernatant are sent to by reuse water pump, pumping station system promotion in evaporation cooling scrubbing tower It is used for one-way or bi-directional pressure water fog spraying gun II, and sets bypass for system flush water.
It is an advantage of the invention that:
1)The present invention is based on transpiration-cooled principles, evaporation cooling are used to spray complex technique with spraying in specific position, Improve system heat exchange efficiency and high-temperature flue gas water mist evaporation cooldown rate, using evaporation cooling high-temperature flue gas, identical water spray Heat exchange amount be 10 times of traditional OG wet methods, therefore the water consumption of cooled flue gas is approached with dry method.
2)The buck that spray circumferential weld washing dehydration integrated tower of spraying is collected is serially connected with evaporation cooling washing by the present invention on the spot One-way or bi-directional pressure water fog spraying gun II is used in the spraying spray washing area of tower lower part, directly reduces de-dusting cycle processing water supply 20%, tradition OG system dust removings water consumption relatively reduces by 50%, and emission reduction of saving water and energy is with the obvious advantage.
3)The present invention, using High-efficiency grey water isolation technics, increases concatenation and supplies water by concatenating circular water treating system on the spot Amount improves concatenation water supply quality, the accidents such as the obstruction of spray generator is effectively prevent, so as to reach water-saving and electricity-saving, coal-gas recovering System low energy consumption safe operation.
4)The present invention is cooled using multi-stage serial connection, dedusting dehydration technique, evaporation cooling is greatly improved, washing removes The grade dust-collection efficiency of dirt unit and flue gas cooling effect, compare in the case where other conditions are identical, and the present invention is using multistage Concatenation cools, dedusting dehydration technique, makes the flue gas into adjustable annular gap scrubber fully clean, adjustable annular gap scrubber Than usual converter, once new two text entrance concentration of OG methods system reduces by 60% to entrance dust conceltration.Compared to the primary new OG of usual converter Method, under the conditions of same pressure differential, liquid-gas ratio, flue gas of converter of the invention is based on evaporation cooling low energy consumption semidry method dedusting system System, since entrance dust concentration is than adjustable annular gap scrubber entrance dust concentration and flue-gas temperature in usual converter once new OG methods Low, so as to which outlet dust concentration be made with flue-gas temperature to compare usual converter, once new OG methods are lower;Temperature reduces, and stickiness reduces, System obtains higher efficiency of dust collection and heat exchange efficiency, in other words, compared to the primary new OG methods of usual converter, in identical liquid-gas ratio Condition, the two will obtain identical exhanst gas outlet concentration in the outlet of adjustable annular gap scrubber, using flue gas base of converter of the present invention In evaporation cooling low energy consumption semidry method dust pelletizing system technology consumption resistance damage compared to lower, system highlights low energy consumption feature.
5)The present invention is combined before adjustable annular gap scrubber entrance using two-fluid (aqueous vapor) spray gun with pressure water fog spraying gun With flue gas cyclone technique, well-mixed water mist is made to enter annular gap scrubber under blower negative pressure effect, before making annular gap scrubber Lower flue-gas temperature can be obtained, so as to improve the cohesion arresting efficiency of fine particle in annular gap scrubber.
6)System unit equipment is few, resistance damage is small, and compared to usual converter, once new OG methods system, resistance damage reduce by 18%, combination dress Putting system operation power consumption reduces by 22%, it is contemplated that 1.2 KWhs/ton of steel of economize on electricity.
7)System unit equipment concatenates, and takes up space and plane takes up little area, relative to common new OG Fa Tawen dedusting works Skill floor space reduces about 30%, and system is concise, and flow is unobstructed compact, system maintenance and simple, convenient.
8)Using upstriker eddy flow moisture film dust removing tube, if dried layer two-fluid (aqueous vapor) spray gun setting up and down and pressure water in pipe Mist spray gun combines or individually uses dried layer two-fluid if (aqueous vapor) spray gun;Using the pressure water mist of lance ejection on rotating centrifugal The wall stream formed under the action of lift and the horizontal downflow weir overflow shape of overflow launder tooth form in upstriker eddy flow moisture film dust removing tube vertical tube Into the moisture film of continuous downward Uniform Flow collect, ash-laden gas is imported under blower negative pressure effect by integrated tower gas approach Tangential negative pressure generate rotation climbing power, get rid of the moistening dust of inward wall by centrifugal force effect is adhered to by moisture film, along inner wall stream Drain to lower end, upstriker eddy flow moisture film dust removing tube detaches the grit particulate matter of moistening from gas using eddy flow centrifugal action Out, dust pelletizing system critical grain size or cut diameter can be reduced, rotational flow dust-removing classification efficiency is increased substantially and steamed so as to improve Feel cold but, the grade dust-collection efficiency of cleaning dust unit and flue gas cooling effect while effectively prevent tube wall incrustation again. The water mists and ash-laden gas individually generated using several groups of two-fluid (aqueous vapor) spray guns pass through one under blower negative pressure effect The tangential negative pressure that tower gas approach imports generates rotation climbing power mixing, and the moistening dust of inward wall is got rid of by water by centrifugal force effect Film, which adheres to down, to be let out, and the water mist of mixing enters annular gap scrubber under blower negative pressure effect, improves fine grained in annular gap scrubber The cohesion arresting efficiency of object disclosure satisfy that the higher dust emission standard of converter coal gas purification recovery system or requirement.
9)Multi-stage serial connection cools, dedusting dehydration technique, and since space heat transfer volume is big, flow of flue gas path length steams More room and times are won in hair, cooling, cleaning dust, and system outlet flue gas gas temperature is once new compared to usual converter OG method systems are low, and saturation moisture includes a new generation's OG systems than usual OG systems in moisture content, that is, flue gas in flue gas as a result, It reduces, when gas recovery substantially reduces the water content in coal gas, improves calorific value of gas, while substantially reduces and export water with wet flue gas Point, system circulation water consume and water process expense are reduced, promotes the gas quality of recycling.
10)Compared with OG systems of new generation, since discharge dust contained flue gas concentration is low, it can significantly slow down draught fan impeller etc. Dust probability , Minus, which occur, for equipment lack blowing out and examines the time clearly, improves production operational availability, extension gas recovery system equipment and wind turbine Service life.Since dustiness is low, humidity is low, abrasiveness is small after gas cleaning, greatly reduces system maintenance work amount, improve The reliability of system operation and safety.
Description of the drawings
Fig. 1 is the structure diagram of the present invention.
Fig. 2 is the structure diagram of nozzle rotation mixed flow generator in Fig. 1.
Fig. 3 is the vertical view of Fig. 2.
1 it is gasification cooling flue in figure, 2 be evaporation cooling scrubbing tower, 3 is spraying spray circumferential weld washing dehydration integrated tower, 4 It is horizontal cyclone dehydrator, 5 be air-water separation chamber, 6 be upstriker eddy flow moisture film dust removing tube, 7 be flue, 8 is two-fluid Spray gun, 9 be one-way or bi-directional pressure water fog spraying gun I, 10 be one-way or bi-directional pressure water fog spraying gun II, 11 be unidirectional spray gun I, 12 Be liquid film overflow launder, 13 be water inlet pipe, 14 be inclined clapboard, 15 be flue gas diversion pipe, 16 be unidirectional spray gun II, 17 be nozzle rotation Mixed flow generator, 18 be unidirectional hydraulic spray nozzle, 19 be export-oriented dedusting dehydration spiral board, 20 be export-oriented dehydrating demisting eddy flow Plate, 21 be two-way gap rinse water fog spraying gun, 22 be two-way normally opened water fog spraying gun, 23 be smoke-intake pipe road, 24 be smoke pipeline, 25 It is dehydrator, 26 be export-oriented dehydration spiral board, 27 be liquid collecting bucket, 28 be unidirectional spray gun III, 29 is self-cleaning water lute drainer I, 30 it is self-cleaning water lute drainer II, 31 be self-cleaning water lute drainer III, 32 be buck comb, 33 is overhead chute, 34 Be hydraulic cyclone seperator of ash and water, 35 be reuse water pump, 36 be pumping station system, 37 be return pipe, 38 be backwash return pipe, 39 It is blow-off pipe, 40 be adjustable annular gap scrubber ontology, 41 be liftable heavily cutting, 42 be hydraulic servomechanism, 43 be guide rod, 44 is Anchor tip, 45 be core bar, 46 be rotary nozzle, 47 be fin, 48 be transit joint, 49 be sleeve, 50 be ball I, 51 be Ball II, 52 be plug-flow spout, 53 be water fog applicator, 54 be overflow pipe, 55 be spoil disposal conveyer.
Specific embodiment
A kind of flue gas of converter be based on transpiration-cooled low energy consumption semidry method dust pelletizing system, including with gasification cooling flue The evaporation cooling scrubbing tower 2 of 1 connection, spraying spray circumferential weld washing dehydration integrated tower 3 and are connected with fans entrance pipe network sleeping Formula eddy flow dehydrator 4, the lower end of the evaporation cooling scrubbing tower 2 are equipped with air-water separation chamber 5, the outlet of the air-water separation chamber 5 End is connected with the input end of upstriker eddy flow moisture film dust removing tube 6, and the port of export and the spraying of upstriker eddy flow moisture film dust removing tube 6 are sprayed The input end of leaching circular seam washing dehydration integrated tower 3 is connected by flue 7, the spraying spray circumferential weld washing dehydration integrated tower 3 port of export is connected with the arrival end of horizontal cyclone dehydrator 4, and the spraying spray circumferential weld washing dehydration integrated tower 3 is equipped with One concatenates circular water treating system on the spot;
The evaporation cooling scrubbing tower 2 is divided to for upper and lower twoth area, and upper area is evaporation cooling and dedusting area, and lower area is washed for spraying spray Area is washed, if being equipped with dried layer two-fluid spray gun 8 or double-current spray gun body 8 and the spray of one-way or bi-directional pressure water mist in evaporation cooling and dedusting area The combination of rifle I9, if being equipped with the one-way or bi-directional pressure water fog spraying gun II10 of dried layer in spraying spray washing area;
The double fluid spray gun body 8 includes two-fluid spray nozzle, water supply supply air line and the gas supply control unit that supplies water, gas selection Nitrogen or steam are other with certain pressure inert gas;
One-way or bi-directional pressure water fog spraying gun I9 and one-way or bi-directional pressure water fog spraying gun II10 includes hollow or real Heart high-efficiency atomizing nozzle, water supply pipe and water circulation unit;
If the downward unidirectional spray gun I11 in dried layer direction, institute are equipped in the upstriker eddy flow moisture film dust removing tube 6 from top to bottom 6 outer wall of upstriker eddy flow moisture film dust removing tube is stated equipped with liquid film overflow launder 12, the liquid film overflow launder 12 is located under flue 7 Side, the liquid film overflow launder 12 are equipped with water inlet pipe 13;
Twoth area up and down are classified as by inclined clapboard 14 in the spraying spray circumferential weld washing dehydration integrated tower 3, upper area is Aerosol mixed flow dedusting area, lower area are combination region, and the combination region top is divided into dehydrating demisting area, and lower part is gravity dewatering zone, It is connected between the aerosol mixed flow dedusting area and combination region by flue gas diversion pipe 15, in the aerosol mixed flow dedusting area along tower If the heart is provided with the downward unidirectional spray gun II16 in dried layer direction from top to bottom, being equipped with adjustable circumferential weld weight in the combination region washs Device is connect with 15 lower end of flue gas diversion pipe, and shell and the annular space that inclined clapboard 14 is formed of adjustable circumferential weld weight washer are rotation Drying zone is flowed, nozzle rotation mixed flow generator 17 is equipped with right over 15 axle center of flue gas diversion pipe, the nozzle rotates mixed flow One layer of unidirectional hydraulic spray nozzle 18 is equipped between generator 17 and flue gas diversion pipe 15, unidirectional 18 direction of hydraulic spray nozzle is along flue gas 15 axle center of diversion pipe is downward;
The shell of the adjustable circumferential weld weight washer is eddy flow drying zone with the annular space that inclined clapboard 14 is formed, described If it is removed if being equipped with the export-oriented dedusting dehydration spiral board 19 of dried layer and the export-oriented dehydration of dried layer in eddy flow drying zone successively from bottom to top Mist spiral board 20, export-oriented 20 upper and lower ends of dehydrating demisting spiral board are respectively equipped with two-way gap and rinse water fog spraying gun 21, Export-oriented dedusting dehydration 19 upper and lower ends of spiral board are respectively equipped with two-way normally opened water fog spraying gun 22;
The port of export of the spraying spray circumferential weld washing dehydration integrated tower 3 is located at 14 lower section of inclined clapboard;
The horizontal cyclone dehydrator 4 includes smoke-intake pipe road 23, smoke pipeline 24, dehydrator 25 and export-oriented dehydration eddy flow Plate 26, the dehydrator 25 are tube structure, and entrance and the spraying in the smoke-intake pipe road 23 spray circumferential weld washing dehydration integrated tower 3 Port of export connection, it is interior and in same level that the outlet in the smoke-intake pipe road 23 and the entrance of smoke pipeline 24 are located at dehydrator 25 On face, 25 lower end of dehydrator is equipped with liquid collecting bucket 27, and export-oriented dehydration spiral board 26 is equipped in the smoke-intake pipe road 23, described Export-oriented dehydration spiral board 26 is located at the exit in smoke-intake pipe road 23, and the front of the export-oriented dehydration spiral board 26 is provided with The unidirectional spray gun III28 of dehydrator 25;
The lower end of the air-water separation chamber 5, spraying spray circumferential weld washing dehydration integrated tower 3 and dehydrator 25 is respectively equipped with certainly Clean water lute drainer I29, self-cleaning water lute drainer II30 and self-cleaning water lute drainer III31, the self-cleaning water seal Buck in water trap I29 is directly discharged into overhead chute 33 by buck comb 32;
The circular water treating system of concatenation on the spot includes hydraulic cyclone seperator of ash and water 34, the hydraulic cyclone ash moisture It is connect from device 34 by buck comb 32 with self-cleaning water lute drainer II30 and self-cleaning water lute drainer III31, the spray The lower end outside of the aerosol mixed flow dedusting area of mist spray circular seam washing dehydration integrated tower 3 passes through buck comb 32 and self-cleaning water seal Water trap II30 connections, the middle part of the hydraulic cyclone seperator of ash and water 34 are connect by reuse water pump 35 with pumping station system 36, Pumping station system 36 is connect by return pipe 37 with one-way or bi-directional pressure water fog spraying gun II10 in evaporation cooling scrubbing tower 2, is pumped System of standing 36 is connect by backwashing return pipe 38 with the upper end of hydraulic cyclone seperator of ash and water 34, hydraulic cyclone seperator of ash and water 34 lower end is connect by blow-off pipe 39 with overhead chute 33.
Further, the evaporation cooling scrubbing tower 2 passes through overflow water seal or Non-Metallic Expansion Joints and Vaporizing cooling cigarette The end connection in road 1.
Further, the flue 7 is located at the upper of the inclined clapboard 14 in spraying spray circumferential weld washing dehydration integrated tower 3 Side, when the port of export of flue 7 is located between the arrival end of flue gas diversion pipe 15 and inclined clapboard 14, flue 7 into Mouth end and the port of export spray circumferential weld washing dehydration integrated tower 3 with the port of export of upstriker eddy flow moisture film dust removing tube 6 and spraying respectively The tangent connection of input end, when the port of export of flue 7 is located above the arrival end of flue gas diversion pipe 15, flue 7 Input end and the 6 tangent connection of upstriker eddy flow moisture film dust removing tube, the port of export and the spraying of flue 7 spray circular seam washing and take off The input end of water integrated tower 3 is radially connected.
Further, the adjustable circumferential weld weight washer includes adjustable annular gap scrubber ontology 40, liftable heavily cutting 41, liquid Press servo mechanism 42 and guide rod 43.
Further, the nozzle rotation mixed flow generator 17 includes anchor tip 44, core bar 45, rotary nozzle 46 and fin 47, the core bar 45 is inscribed in 44 inner cavity of anchor tip, and 45 lower end of core bar passes through anchor tip 44,45 lower end outer circle set of core bar There is transit joint 48,48 lower end outer circle of transit joint is socketed rotary nozzle 46, is equipped between 44 inner wall of core bar 45 and anchor tip Sleeve 49 is connected on 44 inner wall of anchor tip, and 45 upper end of core bar is equipped with boss, and boss lower surface and sleeve are set between 49 upper end There is ball I50, groove is equipped between 45 outer wall of 48 upper end of transit joint and core bar, ball II51, rotary nozzle are equipped in groove Two fins 47 are arranged on 46 side walls, 46 side wall upper edge intracavity sidewall tangent line of rotary nozzle is arranged with eccentric threadiness Plug-flow spout 52 is simultaneously located between two fins 47, and 46 lower end of rotary nozzle is equipped with water fog applicator 53.
Further, the upper end of the hydraulic cyclone seperator of ash and water 34 is connect equipped with overflow pipe 54 with overhead chute 33, institute The lower end for stating hydraulic cyclone seperator of ash and water 34 is equipped with mud discharging mouth, and spoil disposal conveyer 55 is equipped at the mud discharging mouth.
Further, the unidirectional spray gun I11, unidirectional spray gun II16, unidirectional spray gun III28 are double-current spray gun body or double fluid The combination of spray gun body and pressure water fog spraying gun.
Further, the nozzle rotation mixed flow generator 17 is washed by the negative pressure of flue gas diversion pipe 15 to adjustable circumferential weld weight The aditus laryngis and liftable heavily cutting 41 for washing device convey good antiscale property seasoning liquid and flocculating agent online, pass through the chelating of antisludging agent, dispersion is made Occurred with the fouling for effectively preventing adjustable circumferential weld weight washer aditus laryngis and liftable heavily cutting 41, so as to promote and stablize adjustable loop Refined dedusting and temperature reduction performance of the weight washer to flue gas are stitched, while the flocculating agent added in makes to be discharged into hydraulic cyclone seperator of ash and water 34 buck flocculates, and accelerates cohesion, centrifugation, concentration and sedimentation in hydraulic cyclone seperator of ash and water 34.
Further, the double-current spray gun body 8 includes two-fluid spray nozzle, water supply supply air line and supplies water to supply control unit, Gas selection nitrogen or steam are other with certain pressure inert gas.
Further, the pressure water fog spraying gun includes hollow or solid high-efficiency atomizing nozzle, water supply pipe and for water management Unit.
Further, its water inlet pipe 13 of the liquid film overflow launder 12 is justified along liquid film overflow launder 12 tangentially enters overflow launder, overflow Slot makes to be formed on the tube wall circumference in upstriker eddy flow moisture film dust removing tube 6 one layer very thin by the horizontal downflow weir overflow of tooth form Constantly the moisture film of Uniform Flow, the pressure water mist of unidirectional spray gun I11 injections are formed under the action of rotating centrifugal climbing power downwards Wall stream collect with moisture film, ash-laden gas passes through spraying under blower negative pressure effect and sprays 3 entrance of circumferential weld washing dehydration integrated tower The negative pressure that flue imports generates rotation climbing power, and get rid of the moistening travel fatigue of inward wall by centrifugal force effect is adhered to by moisture film, along interior Wall flows to lower end and drains.
Further, the wall stream formed under the action of rotating centrifugal climbing power in the upstriker eddy flow moisture film dust removing tube 6 Can be individually using the wall stream that is formed under the action of rotating centrifugal climbing power of pressure water mist of pressure water fog spraying gun injection or It is the moisture film wall stream of continuous downward Uniform Flow individually formed using the horizontal downflow weir overflow of overflow launder tooth form.
Further, the hydraulic cyclone seperator of ash and water 34 is made of the cylinder and lower part of upper hollow for vertebral body, The upper end inner wall circumference of hydraulic cyclone seperator of ash and water 34 is equipped with inclined arc shaped rotary stream guide groove.
Further, the buck of collection is discharged into hydraulic cyclone seperator of ash and water 34 along 32 waterpower of buck comb, and water-drop point exists The upper end of inclined arc shaped rotary stream guide groove, buck pour waterpower in the inclined arc shaped rotary stream guide groove rotary-cut of hydraulic action lower edge Eddy flow seperator of ash and water 34 generates hydraulic cyclone tangentially and drives buck in hydraulic cyclone seperator of ash and water 34 along cylinder Wall rotates and generates centrifugal force, and shown nozzle rotation mixed flow generator 17 is by the negative pressure of flue gas diversion pipe 15 to adjustable circumferential weld weight It hammers the aditus laryngis of washer into shape and liftable heavily cutting 41 conveys good antiscale property seasoning liquid and flocculating agent online, on the one hand effective prevention adjustable loop The fouling for stitching weight washer aditus laryngis and liftable heavily cutting 41 occurs, and spraying is on the other hand made to spray circumferential weld washing dehydration integrated tower 3 bucks for being discharged into hydraulic cyclone seperator of ash and water 34 on the spot flocculate, under gravitational and centrifugal forces, cohesion compared with Slightly, heavier particulate matter settles and is concentrated and settled in the vertebral body of hydraulic cyclone seperator of ash and water 34, the ash of concentration For mud by being sent by spoil disposal conveyer 55 to converter plaster comprehensive reutilization point, supernatant passes through reuse water pump 35, pumping plant system System 36 is promoted to be sent in evaporation cooling scrubbing tower 2 and be used for one-way or bi-directional pressure water fog spraying gun II10, and set bypass for system Flushing water of uniting is used.
Embodiment 1
The high-temperature flue gas generated at converter mouth after movable gas hood is collected, exchanges heat through gasification cooling flue 1 and cools down, temperature Degree by 1450 DEG C -1600 DEG C drops to 900 DEG C or so in 1 end of gasification cooling flue, first by with 1 end of gasification cooling flue The overflow water seal of connection or Non-Metallic Expansion Joints enter 2 middle and upper part of evaporation cooling scrubbing tower evaporation cooling and dedusting area, evaporation If the group of dried layer two-fluid spray gun 8 or double-current spray gun body 8 and one-way or bi-directional pressure water fog spraying gun I9 are equipped in cooling and dedusting area It closes, if the combination of 8 or double-current spray gun body 8 and one-way or bi-directional pressure water fog spraying gun I9 of high-temperature flue gas warp dried layer two-fluid spray gun The cooling of high density mist fire-fighting, heat absorption evaporation obtain quick extinguishing cooling.Flue gas is continued traveling downwardly to evaporation and is cooled down under scrubbing tower 2 Spraying spray washing area of portion, if being equipped with the one-way or bi-directional pressure water fog spraying gun II10 of dried layer in spraying spray washing area, unidirectionally or The water mist that bidirection press water fog spraying gun II10 is ejected forms high density water mist, makes to cool down moistening through evaporation in flue gas and agglomerate to grow up Particulate matter by spraying, agglomerating, spraying and washing, realize gravity in the air-water separation chamber 5 of evaporation cooling scrubbing tower 2 bottom Flocking settling, the higher buck of turbidity are efficiently separated with flue gas, and self-cleaning water lute drainer I29 is drained by waterpower.It evaporates cold But the outlet of 2 downside of scrubbing tower or the exit gas temperature of air-water separation chamber 5 are cooled to 70 DEG C.
Flue gas after primary rough dedusting enters upstriker eddy flow moisture film dust removing tube 6, and ash-laden gas is acted in blower negative pressure Rotation climbing power is generated by the tangential negative pressure that flue 7 imports down, the moistening flue dust of inward wall is got rid of by centrifugal force effect Grain is adhered to by moisture film, and flowing to lower end along inner wall drains.
If it is provided with dried layer two-fluid spray gun or by double-current spray gun body and pressure water mist in upstriker eddy flow moisture film dust removing tube 6 Two kinds of spray guns combination of spray gun, injects water mist along upstriker eddy flow moisture film dust removing tube 6, increases significantly the water in flue gas in the region Fog density, flue gas carry water mist rotation mixed, collision, condensation and cohesion, and the dust-laden water mist of cohesion is in the effect of rotating centrifugal climbing power Lower formation wall stream, if dried layer two-fluid spray gun or two kinds of spray guns by double-current spray gun body and pressure water fog spraying gun combine injection water mist The wall stream of formation and eddy flow moisture film synergy are completed to cool down the primary rough dedusting higher intensity of scrubbing tower 2 compared to usually evaporation Cyclone water-film and spray washing dedusting cooling, aqueous vapor separation process, simultaneously because 6 inner wall circumference of upstriker eddy flow moisture film dust removing tube The moisture film of continuous downward Uniform Flow one layer very thin uniformly distributed so that 6 inner wall of upstriker eddy flow moisture film dust removing tube is not easy fouling, Incrustation of pipe resistance damage is effectively prevent to increase.
This process using cyclone type moisture film and flue gas eddy flow, spraying, interception, mix and agglomerate and gather dust-cleaning principle, cigarette Gas rotary-cut raw with droplet mass-sending and blending, the water fog particle of high speed are further moistened by elastic collision and dust-laden particle in flue gas And cohesion, eddy flow overcome the resistance of air film and liquid film, enhance motive force of the system rough dedusting removal procss to smoke catching, improve Evaporation cooling, the classification efficiency of cleaning dust unit, the exit gas temperature of upstriker eddy flow moisture film dust removing tube 6 are cooled to 68 ℃。
Purified flue gas tangentially imports spraying spray by flue 7 under system fan suction function, by top Circular seam washing is dehydrated upper area's aerosol mixed flow dedusting area of integrated tower 3, and flue gas is in the tower wall and flue gas of upper area's aerosol mixed flow dedusting area It rotates and rises or falls in the circular passage that diversion pipe 15 is surrounded for inner cylinder, along spraying spray circumferential weld in aerosol mixed flow dedusting area If two kinds of sprays of dried layer two-fluid spray gun or double-current spray gun body and pressure water fog spraying gun are arranged at 3 center of washing dehydration integrated tower up and down Rifle combines, and sprays the high density water mist of formation, and ash-laden gas is after the washing cooling of upstriker eddy flow moisture film dust removing tube 6 and carries cigarette Dirt particulate matter enters upper area's aerosol mixed flow dedusting area for the free water mist of core.Further rotation is mixed with pressure gas water mist for saturated flue gas, Water fog particle with soot dust granule object with colliding, cohesion, and become wall sedimentation under the action of eddy flow centrifugal force, completes multi-level water qi leel From.Buck is drained by 14 low side buck comb of inclined clapboard, 32 waterpower in self-cleaning water lute drainer II30.
Part water mist is inhaled along 3 center downlink of spraying spray circumferential weld washing dehydration integrated tower under system fan suction function Enter flue gas diversion pipe 15 and enter in adjustable loop seam weight washer.
Through evaporation cooling scrubbing tower 2, air-water separation chamber 5, upstriker eddy flow moisture film dust removing tube 6, spraying spray circular seam washing The multi-stage serial connections such as the aerosol mixed flow dedusting area in area cool on dehydration integrated tower 3 is dehydrated with dedusting, and evaporation is greatly improved Cooling, the classification dedusting cooling efficiency of cleaning dust unit make the flue gas entered in adjustable circumferential weld weight washer fully clean, Flue-gas temperature is cooled to about 66 DEG C, and 15 entrance dust conceltration of flue gas diversion pipe is led than the flue gas of an existing flue gas OG system of converter Flow tube entrance dust conceltration reduces by 60%, and flue gas is 5-8 DEG C low, more clean flue gas carry water mist under blower negative pressure effect into Enter and refined dedusting temperature-fall period is carried out in adjustable circumferential weld weight washer.
Adjustable circumferential weld weight washer has the function of two kinds of adjusting tolerance and purification cooled flue gas, micro- according to converter mouth Differential pressure signal requirement and coal-gas recovering or the technological operation requirement diffused, using hydraulic servomechanism 42, then pass through executing agency The adjustable scalable heavily cutting 41 in circumferential weld weight washer lower end is controlled to move up and down, the size for adjusting contact area carries out coal to coal gas The control of gas dust content, that is, it is 40mg/Nm3 to control coal-gas recovering dust content, and discharge dust content is less than 30mg/Nm3.
It exports and enters from adjustable 40 diffuser of annular gap scrubber ontology through the adjustable purified flue gas of circumferential weld weight washer Dehydrating demisting area, dehydrating demisting area include:Adjustable 40 diffuser of annular gap scrubber ontology exports the gravity air water point to down space It is enclosed from area and adjustable 40 outer wall of annular gap scrubber ontology with 3 tower wall of spraying spray circumferential weld washing dehydration integrated tower, inclined clapboard 14 Into circular passage space, i.e., along the upward eddy flow drying zone of gravity gas-water separation zone.
If if the export-oriented dedusting dehydration spiral board 19 of dried layer and dried layer extroversion are respectively equipped in eddy flow drying zone from bottom to top Type dehydrating demisting spiral board 20 has two-way normally opened water fog spraying gun 22 on export-oriented dedusting dehydration spiral board 19, continuous double Side cloth liquid, the misty liquid droplets large area dispersion on export-oriented dedusting dehydration spiral board 19, forms liquid film and liquid net, upward with rotating Gas-liquid the physical processes such as form strong agitation, remix, agglomerate, efficiently separating, remove the fine soot dust granule in flue gas, It realizes that the depth of flue gas is clean, is normally opened for water system;Two-way gap punching is had on export-oriented dehydrating demisting spiral board 20 Water fog spraying gun 21 is washed, flue gas is clean through several groups of export-oriented 20 dehydrating demisting depth of dehydrating demisting spiral board, completes air-liquid point From the liquid stream isolated agglomerates to form moisture film through under the narrow annular channel between export-oriented 20 outer diameter of dehydrating demisting spiral board and tower wall It lets out, self-cleaning water lute drainer II30 is drained by 32 waterpower of buck comb, rinsed for water system for gap, spraying spray circumferential weld The exit gas temperature of washing dehydration integrated tower 3 is cooled to 53-58 DEG C.
The exiting flue gas of spraying spray circumferential weld washing dehydration integrated tower 3 under blower negative pressure effect by smoke-intake pipe road 23 into Enter dehydrator 25, export-oriented dehydration spiral board 26 is equipped in smoke-intake pipe road 23, export-oriented dehydration spiral board 26 is located at smoke-intake pipe road 23 exit, the front of export-oriented dehydration spiral board 26 are provided with the double-current spray gun body of dehydrator 25 or by double-current spray gun body It is combined with two kinds of spray guns of pressure water fog spraying gun, is let out under the separating liquid and cleaning solution in dehydrator 25 to bottom of towe and be discharged into self-cleaning water It seals in water trap III31, effect sprays circumferential weld washing dehydration when being and meeting the lower dust content emission request of flue gas to spraying The exiting flue gas of integrated tower 3 carries out depth cleaning processing, it is ensured that exhanst gas outlet dust content is stablized less than 25mg/Nm3, flue gas temperature Degree continues cool to 50-55 DEG C.
Flue gas is after flue gas of converter is based on transpiration-cooled low energy consumption semidry method dust pelletizing system cooling and dedusting, in wind Machine negative pressure effect enters in fans entrance pipe network, and three-way switch valve is boosted to by centrifugal blower.When flue gas meets recycling condition When, flue gas switches to water seal inverted valve by three-way switch valve, is honored as a queen by water seal inverted valve and gas holder Inlet water and is sent to coal gas Then gas pressing is sent to each user by cabinet by the booster fan of Gas Pressurization Station;When flue gas does not meet recycling condition, flue gas Diffusing chimney is switched to through by-passing valve, three-way switch valve, then passes through blowdown stack ignition bleeding.
The buck that spraying spray circumferential weld washing dehydration integrated tower 3 is collected drains into self-cleaning water lute drainer by waterpower II30, then buck waterpower is discharged into hydraulic cyclone seperator of ash and water 34, hydraulic cyclone buck by self-cleaning water lute drainer II30 Separator 34 is made of the cylinder and lower part of upper hollow for vertebral body, the upper end inner wall circle of hydraulic cyclone seperator of ash and water 34 Week is equipped with inclined arc shaped rotary stream guide groove.
Further, the buck of collection is discharged into hydraulic cyclone seperator of ash and water 34 along 32 waterpower of buck comb, and water-drop point exists The upper end of inclined arc shaped rotary stream guide groove, buck pour waterpower in the inclined arc shaped rotary stream guide groove rotary-cut of hydraulic action lower edge Eddy flow seperator of ash and water 34 generates hydraulic cyclone tangentially and drives buck in hydraulic cyclone seperator of ash and water 34 along cylinder Wall rotates and generates centrifugal force, and under gravitational and centrifugal forces, thicker, the heavier particulate matter of cohesion settles and in waterpower It is concentrated and is settled in the vertebral body of eddy flow seperator of ash and water 34, the plaster of concentration by spoil disposal conveyer 55 by being sent to turning Ashes mud comprehensive reutilization point, supernatant are sent to evaporation cooling scrubbing tower 2 by reuse water pump 35, the promotion of pumping station system 36 It is interior to be used for one-way or bi-directional pressure water fog spraying gun II10, and bypass is set for system flush water.Hydraulic cyclone seperator of ash and water 34 plaster and overflow water is discharged by blow-off pipe 39 and the concentration of overflow pipe 54 in overhead chute 33 respectively.
Embodiment 2
Flue gas of converter carries out the data of gas purification recycling such as based on evaporation cooling low energy consumption semidry method dust pelletizing system Under:
By taking 80T converters as an example:95 tons of converter maximum tap, converter are averaged 90 tons, oxygen blow duration 15min of tap, supply 18000 Nm3/h of oxygen intensity, converter gas are handled using unburned method, coal-gas recovering, coefficient of excess air а=0.1.
Inlet flue gas amount: 24×104Am3/h;
Smoke inlet temperature: 850--1000℃;
Inlet flue gas humidity:Dry gas
Inlet flue gas pressure: -0.5kPa;
Raw flue gas dust content: 100~150g/ Nm3;
Design system treatment quantity: 50000Nm3/h;
Exit gas temperature: 55℃;
Exiting flue gas humidity: 100%;
Evaporation cooling scrubbing tower+upstriker eddy flow moisture film dust removing tube+aerosol mixed flow dedusting area:Overflow water and water spray 260m3/h, wherein the buck that spraying spray circumferential weld washing dehydration integrated tower is collected is serially connected with the lower part spraying of evaporation cooling scrubbing tower Spray washing area spray gun uses, on the spot reuse water supply 60t/h nitrogen amounts 550N m3/h, outlet temperature≤68 DEG C;
Spraying spray circumferential weld washing dehydration integrated tower annular gap scrubber:Inlet flue gas amount 102000Am3/h (normal), water spray Measure 100t/h;Spraying spray circumferential weld washing dehydration integrated tower exit gas temperature≤55 DEG C;Dehydrating tower exit gas temperature≤53 ℃;Dust content 24mg/Nm3 is discharged after gas cleaning(Mark condition);Exiting flue gas pressure: -16kPa.
Example is performed as described above, if flue gas is diffused dust emission concentration stability contorting in 40mg/m3 hereinafter, configuration this patent institute Stating flue gas of converter can be met the requirements based on evaporation cooling low energy consumption semidry method dust pelletizing system.System resistance is combined the unit simultaneously < 15.6KPa are damaged, system can configure the wind turbine power of lower power.This patent is sprayed in specific position using evaporation cooling with spraying Complex technique is drenched, improves system heat exchange efficiency and cooldown rate, the buck that spraying spray circumferential weld washing dehydration integrated tower is collected It is serially connected with evaporation cooling scrubbing tower lower part spraying spray washing area spray gun to use, directly reduces de-dusting cycle processing water supply 20%, Tradition OG system dust removings water consumption reduces by 50% relatively, and emission reduction of saving water and energy is with the obvious advantage.
More than, the preferred embodiment of patent only of the present invention, but protection scope of the present invention is not limited thereto, and it is any ripe Those skilled in the art are known in the technical scope of present disclosure, by-determine professional technique and theoretical understanding, The change or replacement that can be readily occurred in, should all cover the present invention conservation in the range of, therefore the present invention conservation range with Subject to the protection domain that claim is defined.

Claims (8)

1. a kind of flue gas of converter be based on transpiration-cooled low energy consumption semidry method dust pelletizing system, which is characterized in that including with vapour Change the evaporation cooling scrubbing tower of cooling stack connection, spraying sprays circumferential weld washing dehydration integrated tower and is connected with fans entrance pipe network The horizontal cyclone dehydrator connect, the lower end of the evaporation cooling scrubbing tower are equipped with air-water separation chamber, and the air-water separation chamber goes out Mouth end is connected with the input end of upstriker eddy flow moisture film dust removing tube, and the port of export and the spraying of upstriker eddy flow moisture film dust removing tube are sprayed The input end of leaching circular seam washing dehydration integrated tower is connected by flue, the spraying spray circumferential weld washing dehydration integrated tower The port of export is connected with the arrival end of horizontal cyclone dehydrator, and the spraying spray circumferential weld washing dehydration integrated tower is equipped with one on the spot Concatenate circular water treating system;
The evaporation cooling scrubbing tower is divided into twoth area up and down, and upper area is evaporation cooling and dedusting area, and lower area is spraying spray washing area, If evaporate the group that dried layer two-fluid spray gun or double-current spray gun body and one-way or bi-directional pressure water fog spraying gun I are equipped in cooling and dedusting area It closes, if being equipped with the one-way or bi-directional pressure water fog spraying gun II of dried layer in spraying spray washing area;
The double fluid spray gun body includes two-fluid spray nozzle, water supply supply air line and the gas supply control unit that supplies water, gas selection nitrogen Or steam or other with certain pressure inert gas;
One-way or bi-directional pressure water fog spraying gun I and one-way or bi-directional pressure water fog spraying gun II includes hollow or solid efficient mist Change nozzle, water supply pipe and water circulation unit;
If the downward unidirectional spray gun I in dried layer direction, the uplink are equipped in the upstriker eddy flow moisture film dust removing tube from top to bottom Formula eddy flow moisture film dust removing tube outer wall is equipped with liquid film overflow launder, and the liquid film overflow launder is located at below flue, the liquid film Overflow launder is equipped with water inlet pipe;
Twoth area up and down are classified as by inclined clapboard in the spraying spray circumferential weld washing dehydration integrated tower, upper area is aerosol mixed flow Dedusting area, lower area are combination region, and the combination region top is divided into dehydrating demisting area, and lower part is gravity dewatering zone, the aerosol It is connected between mixed flow dedusting area and combination region by flue gas diversion pipe, the aerosol mixed flow dedusting area Nei Yanta centers are from top to bottom If being provided with the downward unidirectional spray gun II in dried layer direction, adjustable circumferential weld weight washer and flue gas water conservancy diversion are equipped in the combination region Pipe lower end connects, and the shell of adjustable circumferential weld weight washer and the annular space that inclined clapboard is formed are eddy flow drying zone, the cigarette Nozzle is equipped with right over conductance flow tube axle center and rotates mixed flow generator, the nozzle rotation mixed flow generator and flue gas diversion pipe it Between be equipped with one layer of unidirectional hydraulic spray nozzle, the unidirectional hydraulic spray nozzle direction is downward along flue gas diversion pipe axle center;
The shell of the adjustable circumferential weld weight washer is eddy flow drying zone with the annular space that inclined clapboard is formed, and the eddy flow takes off If if being equipped with the export-oriented dedusting dehydration spiral board of dried layer and the export-oriented dehydrating demisting spiral board of dried layer in pool successively from bottom to top, The export-oriented dehydrating demisting spiral board upper and lower ends are respectively equipped with two-way gap and rinse water fog spraying gun, and the export-oriented dedusting takes off Water spiral board upper and lower ends are respectively equipped with two-way normally opened water fog spraying gun;
The port of export of the spraying spray circumferential weld washing dehydration integrated tower is located at below inclined clapboard;
The horizontal cyclone dehydrator includes smoke-intake pipe road, smoke pipeline, dehydrator and export-oriented dehydration spiral board, the dehydration Device is tube structure, and the entrance in the smoke-intake pipe road is connect with the port of export of spraying spray circumferential weld washing dehydration integrated tower, described The outlet in smoke-intake pipe road and the entrance of smoke pipeline are located in dehydrator and in same level, and the dehydrator lower end is equipped with Liquid collecting bucket, export-oriented dehydration spiral board is equipped in the smoke-intake pipe road, and the export-oriented dehydration spiral board is located at smoke-intake pipe road Exit is provided with the unidirectional spray gun III of dehydrator in front of the export-oriented dehydration spiral board;
The lower end of the air-water separation chamber, spraying spray circumferential weld washing dehydration integrated tower and dehydrator is respectively equipped with self-cleaning water seal Buck in water trap I, self-cleaning water lute drainer II and self-cleaning water lute drainer III, the self-cleaning water lute drainer I Overhead chute is directly discharged by buck comb;
The circular water treating system of concatenation on the spot includes hydraulic cyclone seperator of ash and water, and the hydraulic cyclone seperator of ash and water leads to It crosses buck comb to connect with self-cleaning water lute drainer II and self-cleaning water lute drainer III, the spraying spray circular seam washing The lower end outside for being dehydrated the aerosol mixed flow dedusting area of integrated tower is connect by buck comb with self-cleaning water lute drainer II, described The middle part of hydraulic cyclone seperator of ash and water is connect by reuse water pump with pumping station system, and pumping station system is cold with evaporating by return pipe But one-way or bi-directional pressure water fog spraying gun II connections in scrubbing tower, pumping station system is by backwashing return pipe and hydraulic cyclone ash The upper end connection of separator, the lower end of hydraulic cyclone seperator of ash and water is connect by blow-off pipe with overhead chute.
2. flue gas of a kind of converter according to claim 1 is based on transpiration-cooled low energy consumption semidry method dust pelletizing system, It is characterized in that, the evaporation cooling scrubbing tower passes through overflow water seal or Non-Metallic Expansion Joints and the end of gasification cooling flue End connection.
3. flue gas of a kind of converter according to claim 1 is based on transpiration-cooled low energy consumption semidry method dust pelletizing system, It is characterized in that, the flue is located at the top of the inclined clapboard in spraying spray circumferential weld washing dehydration integrated tower, work as flue gas When the port of export of pipeline is located between the arrival end and inclined clapboard of flue gas diversion pipe, the inlet end and an outlet end difference of flue The tangent connection of input end of circumferential weld washing dehydration integrated tower is sprayed with the port of export of upstriker eddy flow moisture film dust removing tube and spraying, when When the port of export of flue is located above the arrival end of flue gas diversion pipe, input end and the upstriker eddy flow moisture film of flue The tangent connection of dust removing tube, the input end of the port of export and spraying spray circumferential weld washing dehydration integrated tower of flue are radially connected.
4. flue gas of a kind of converter according to claim 1 is based on transpiration-cooled low energy consumption semidry method dust pelletizing system, It is characterized in that, the adjustable circumferential weld weight washer includes adjustable annular gap scrubber ontology, liftable heavily cutting, hydraulic servo-machine Structure and guide rod.
5. flue gas of a kind of converter according to claim 1 is based on transpiration-cooled low energy consumption semidry method dust pelletizing system, It is characterized in that, nozzle rotation mixed flow generator includes anchor tip, core bar, rotary nozzle and fin, in the core bar It is connected in anchor tip inner cavity, core bar lower end passes through anchor tip, and core bar lower end outer circle is cased with transit joint, transit joint lower end Outer circle is socketed rotary nozzle, is connected on anchor tip inner wall equipped with sleeve between core bar and anchor tip inner wall, core bar upper end Equipped with boss, ball I is equipped between boss lower surface and sleeve upper end, is equipped between transit joint upper end and core bar outer wall recessed Slot, groove is interior to be equipped with ball II, is arranged with two fins on rotary nozzle side wall, rotary nozzle side wall upper edge intracavity sidewall is cut Line is arranged with eccentric linear plug-flow spout and between two fin, and rotary nozzle lower end is equipped with water fog applicator.
6. flue gas of a kind of converter according to claim 1 is based on transpiration-cooled low energy consumption semidry method dust pelletizing system, It is characterized in that, the upper end of the hydraulic cyclone seperator of ash and water is connect equipped with overflow pipe with overhead chute, the hydraulic cyclone The lower end of seperator of ash and water is equipped with mud discharging mouth, and spoil disposal conveyer is equipped at the mud discharging mouth.
7. flue gas of a kind of converter according to claim 1 is based on transpiration-cooled low energy consumption semidry method dust pelletizing system, It is characterized in that, the unidirectional spray gun I, unidirectional spray gun II, unidirectional spray gun III are double-current spray gun body or double-current spray gun body and pressure The combination of power water fog spraying gun.
8. flue gas of a kind of converter according to claim 1 is based on transpiration-cooled low energy consumption semidry method dust pelletizing system, It is characterized in that, nozzle rotation mixed flow generator by the negative pressure of flue gas diversion pipe to the larynx of adjustable circumferential weld weight washer Mouth and liftable heavily cutting convey good antiscale property seasoning liquid and flocculating agent online, are effectively prevented by the chelating of antisludging agent, peptizaiton The fouling of adjustable circumferential weld weight washer aditus laryngis and liftable heavily cutting occurs, so as to promote and stablize adjustable circumferential weld weight washer Refined dedusting and temperature reduction performance to flue gas, while the flocculating agent added in makes the buck for being discharged into hydraulic cyclone seperator of ash and water wad a quilt with cotton It is solidifying, accelerate cohesion, centrifugation, concentration and sedimentation in hydraulic cyclone seperator of ash and water.
CN201510787768.2A 2015-09-04 2015-11-17 A kind of flue gas of converter is based on transpiration-cooled low energy consumption semidry method dust pelletizing system Active CN105238904B (en)

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KR102082112B1 (en) * 2018-10-18 2020-02-27 주식회사 포스코건설 Apparatus for disposing an exhaust gas in a converter
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