CN2536289Y - Desulfurizing dust collector by vortex wet method - Google Patents

Abstract

The utility model relates to a smoke desulphurizing dust extractor, in particular to a vortex wet desulphurizing dust extractor, applicable to coal burning boiler for smoke desulphurizing and dust extracting. The utility model comprises such elements as a vortex scrubber and a worm gas-water moisture trap. The principle is that the washing solution ejects from the entrance of the volute and is carried by the high-speed air flow to enter the volute and then enters a center field via a guide impeller to rotate. Then minute droplets are separated by the centrifugal force and fly off in a direction opposite to the air flow entering the center field. The high-speed converse movement of the liquid gas greatly improves the desulphurizing and dust extracting effect. The dust extracting ratio reaches as high as 99 % and the desulphurizing ratio reaches as high as 70%. Furthermore, the resistance is low and particularly, the smoke does not carry any fog or water.

Description

Vortex wet method sulphur removing and dust removing device

Affiliated technical field

The utility model relates to a kind of smoke desulfurization dust remover, particularly relates to a kind of flue gas vortex wet method sulphur removing and dust removing device.It is applicable to the flue gas ash removal and the desulfurization of equipment such as coal-burning boiler.

Background technology

During the operation of equipment such as coal-burning boiler, contain harmful substances such as dust, sulfur dioxide in the flue gas of being discharged, atmosphere pollution.In recent decades along with rapid economic development, the rapid increase of coal combustion equipments such as boiler, the atmosphere pollution that numerous boiler caused is quite serious, and some places acid rain causes disaster.Because the environmental pollutions that coal combustion equipment caused such as boiler have threatened human existence, become current many cities, many countries problem anxious to be solved.Therefore cause common people's common concern.China attaches great importance to environmental protection, and particularly recent two decades comes, and country has strengthened the control of environmental pollution.The flue gas pollutant of energy consumption equipments such as boiler has been formulated the discharge standard of limiting the quantity of, and repeatedly made amendment, and strict time by time.Eighties of last century middle nineteen nineties particularly, again the revision standard for boiler soot discharge in, clearly stipulated the discharging of sulfur dioxide after, China has strengthened the dynamics of preventing and treating of smoke pollution, by simple control smoke contamination, expand integrated control to sulfur dioxide.The pollution control equipment of boiler smoke is also by various nonaqueous dust cleaners, changes the hydrofilter of dedusting simultaneously and desulfurization into, have in addition adopt and do wet two-stage dust removal desulfurization.With hydrofilter flue gas is carried out desulfurization, its essence is and adopt absorption process that flue gas is separated, promptly from flue gas, sulfur dioxide is absorbed out, make it to form neutral aqueous solution with alkaline aqueous solution, perhaps make the reaction of sulfur dioxide and alkaline aqueous solution, generate the sulfur-containing compound precipitation.

Along with progress of science and technology, though the method for separating SO 2 is existing multiple from flue gas, the technology that has is also quite advanced, but most equipment more complicated, systematic comparison is huge, and investment and operating cost are higher, relatively be applicable to uses such as large-sized boiler, particularly station boiler.And very not suitable to numerous medium small boiler, relatively be adapted to the method for medium small boiler flue gas desulfurization so far, remain the method that absorbs with the aqueous solution, its equipment also mostly is various wet dedusting equipment.In order to emphasize that it has desulfidation, the equipment that often will be called hydrofilter recently in the past renames as the wet method sulphur removing and dust removing device, or wet dust removal desulphurization device etc.

Existing multiple wet dedusting desulfurization equipment, in various degree have a following defective: the one, the efficient of dedusting and desulfurization is not high, particularly the lower hydrofilter of some resistances is not high as the dedusting and the desulfuration efficiency of hydrofilters such as water film type, impact type, water-bath type.And some desulfurization dust-removing efficiencies high as Venturi, its circulating resistance is bigger again, it is higher to consume energy.The 2nd, most of wet-desulfurizing dust removers band water band mist in various degree that is in operation, some adopts the boiler of wet dedusting, and the long in tow linen band fog dust gas of chimney promptly can be card.Because flue gas band fog belt water enters the normal operation that air-introduced machine and flue will directly influence air-introduced machine, severe patient may cause blower fan to damage too early.Most of in addition wet dedusting desulfurization equipment volume are huge, and as gallet water curtain dust collector and various desulfurizing towers etc., they take up an area of bigger.Can make wet dedusting and desulfurizer both have higher efficient, and circulating resistance is little, makes it to reach energy-efficient, be in operation again simultaneously and make flue gas band fog belt water? this is a purpose of this utility model.

Summary of the invention

The utility model will provide a kind of dust-removal and desulfurizing efficient height exactly, and circulating resistance is little, and energy-conservation, water saving and flue gas be not with the Wetting desulfurizing dust-collector of water band mist, and its major advantage is as follows:

1, efficiency of dust collection is up to 97-99%, and desulfuration efficiency can reach about 70%, through its flue dust of flue gas and the sulfur dioxide (SO2) emissions that the utility model is handled, meets I class environmental protection zone standard code fully.

2, high concentrate dust, sticky ash, ultrafine dust etc. had unique function of removing.

3, water consumption is few, only is 1/5 of Venturi, if adopt recycling, water consumption is few.

4, circulating resistance is low, can be reduced to 600Pa.

5, flue gas is not with water band mist, can guarantee the flue gas drying discharging.

6, facility compact, volume is little, takes up an area of to lack, and constructs simpler, safe and reliable to operation.The smoke treatment amount for a long time can the use in parallel of many table apparatus.

7, have governor motion, can change according to boiler working condition and regulate, make it keep optimum Working, also suitable simultaneously Automatic Control of Boiler.

In order to illustrate that how task of the present utility model is finished, and at first wants the principal element of analyzing influence wet dedusting and sulfur dioxide absorption efficiency.Wet dedusting is that grit is transferred to the process in the liquid from air-flow, and this transfer process depends primarily between the size of interfacial area between gas and the liquid and the two kinds of fluid states and the relative motion between dirt powder and the liquid.And desulfurization its essence is in absorber from flue gas, make flue gas by contacting with liquid-absorbant, sulfur in smoke is transferred to absorbent effectively, to a great extent, the absorptivity of sulfur dioxide also depends on the size of gas and liquid surface area, relative motion between two kinds of fluid states of particularly size of active interface area, and gas and liquid.The dust-removal and desulfurizing efficient of some hydrofilter is not high, and as the granite with water film hydrofilter, the main cause that its efficient is not high is that the relative motion flow velocity between flue gas and the moisture film is lower, and the contact interface area of flue gas and liquid is too little.And in Venturi, at throat's flue gas with high flow velocity (can reach 150 meter per seconds) when passing through, contact (bump) with the water that from throat's pipe tap, sprays, consequent large interface makes Venturi become the most effective hydrofilter and absorber, and so required energy of high efficiency is sizable.

The technical scheme that its technical problem that solves the utility model adopts is: create very big interfacial area for the contact between gas, the liquid on the one hand, on the other hand, create very high speed of related movement again, make it have very high dedusting and desulfuration efficiency, and circulating resistance is little.

The utility model uses the vortex smoke washer of flow field, center principle design, bears the desulfurization and the dedusting task of flue gas; Utilize the worm-gear type moisture trap of centrifugal principle design, bearing the task of separating, washing drop from the flue gas after the washing.The utility model mainly is made up of flue gas vortex washer, core pipe, worm-gear type moisture trap and governor motion four parts.

The vortex washer is made up of the spirality Crucible shell and the guide vane wheel two large divisions of horizontal positioned, and its shape is the spitting image of an actionless blower fan that keeps flat.Guide vane wheel is installed in the central authorities of spiral case, and the inner chamber of spiral case is divided into the two large divisions: the outside of guide vane wheel is the spirality channel of spiral case, and the inside of guide vane wheel is circular central field.

Being constructed as follows of spiral case: spiral case is made up of loam cake, spiral side plate and rectangular inlet etc.Following and funnel shaped mud bucket of spiral case connects into an integral body, the bottom of mud bucket is provided with mud tube, the loam cake of spiral case is a flat board, for guide vane wheel is installed, be provided with the projection of a short cylinder shape in the central authorities of spiral case loam cake, in the upper end of short cylinder, be provided with the big flange of mounting core pipe.After being installed on the core pipe on the flange, will between the cylindrical of the short cylinder projection of spiral case loam cake and core pipe, form an annular space, use in order to guide vane wheel is installed.

Guide vane wheel is by the chassis and the last annulus of circle and be clipped in many guide vanes that are uniformly distributed along the circumference in the middle of both and form one with welding method, the curved shape of the cross section of guide vane, its effect are to force the flue gas that flows through guide vane wheel promptly to rotate after entering central field.The first half of guide vane wheel is installed in the short cylinder shape projection and the annular space between the core pipe cylindrical of spiral case loam cake, pull bar with governor motion is suspended on it on big ring flange of core pipe, can order about guide vane wheel by governor motion rises or descends, enter the flow velocity of central field thereby can change height (being the effective width of impeller) that impeller exposes in spiral case in order to the control flue gas, reach the purpose of regulating desulfurization dust-removing efficiency and circulating resistance.

Import department at spiral case is provided with two upright feed pipes, is drilled with the hole for water spraying of a row perpendicular to flue gas flow direction on the water pipe.

The action principle of vortex smoke washer is as follows: flue gas tangentially enters the spirality channel of spiral case by entering the mouth, and enters central field through guide vane wheel, and flows to the center, because the guide effect of blade, flue gas promptly rotates after entering central field through guide vane wheel.Porch at spiral case, what feed pipe sprayed need not be brought into helical duct by flue gas by strict a small amount of cleaning solution of controlling, drop that some are bigger and dust granules bump against directly because of effect of inertia on the wall of spiral case and fall and form under the water film flow, flow into the mud bucket, discharge through mud tube then.A large amount of tiny drops are carried secretly by air-flow and are entered central field, be rotated air-flow and accelerate to air velocity, be dispersed into the thinner atomized liquid of granularity simultaneously, tiny drop is subjected to the acting in conjunction of centripetal force and centrifugal force in the flow field, center, because flue gas is in flowing to the process at center, rotary speed is accelerated gradually, the centrifugal force that is clipped in the fine drop in the air-flow sharply increases thereupon, when greater than centripetal force, will tangentially leave rotational trajectory, window by guide vane wheel is rightabout with the air-flow that enters central field and flies out then, fall until bumping against on the spiral case wall, the cleaning flue gases that is washed then vertically flows to the moisture trap of top by the core pipe, drawn by air-introduced machine after gas-water separation.

Because in the vortex of central field, a large amount of drops is become the minimum atomized liquid of particle diameter by airflow crash, make enough big contact interface is arranged between the gas-liquid, rotatablely moving and prolonged gas-liquid contact time greatly simultaneously at central field, particularly owing to existing reverse movement at a high speed between drop in the utility model and the flue gas, make the forward mobile remarkable improvement that has in essence of liquid gas of the devices such as contact gear ratio venturi between cleaning solution and flue gas, therefore, can under lower circulating resistance, obtain very high desulfurization and dedusting effect.

The core pipe is the short tube of a circle, between vortex washer and moisture trap, play a part to connect both and become as a whole, there is a big ring flange centre of core pipe, link to each other with flange above the spiral case with it, the infundibulate bottom of the upper end of core pipe and moisture trap is welded together, after the core pipe is installed on the spiral case, the lower end is concordant with the spiral case loam cake, the cylindrical of core pipe nestle up guide vane wheel in the circle, for make guide vane wheel in maintain a certain distance between circle and the outlet of core pipe, make flue gas keep certain rotating cycle at central field, for be provided between flue gas and the cleaning solution necessary time of contact, the Lower Half of core pipe (below big ring flange) is made double-deck hollow tube wall, annulus of welding between the about layer of core pipe lower end.

In order to prevent the discharging of flue gas with water band mist, the utility model has designed a worm-gear type moisture trap that efficient is higher.The worm-gear type moisture trap by shell with separate worm gear two big parts and form, shell is made up of the loam cake and the base plate of cylinder and taper type, base plate is provided with gas approach, be connected with cylindrical shell with flange, on loam cake, be provided with exhanst gas outlet, loam cake and cylindrical shell are integrally welded, bottom center at separator is provided with the gas-water separation worm gear, its top is inverted conical top cover, the bottom is funnel shaped bottom plate, and with bottom plate air inlet pipe welded together, be the blade of the curved shape of cross section between the cover plate up and down, worm gear relies on several gripper shoes to be fixed on the bottom of shell, and the air inlet pipe of worm gear is thinner than core pipe, assign in the core pipe, and formed the gap of an annular between the core pipe.

The action principle of worm gear separator is as follows: the cleaning flue gases by the washer washing upwards flows via the core pipe, enter the separation worm gear through the air inlet pipe of separating worm gear then, under the guide effect that separates wormwheel blade, after making flue gas flow through the separation worm gear, will in the moisture trap cylindrical shell, rotate, because action of centrifugal force makes in the flue gas institute's droplets entrained be thrown toward and forms moisture film on the barrel wall, flow downward, the moisture film of cylinder inboard wall provides help for further catch the drop of separating from flue gas.The water that process worm gear separator is separated is along flowing to the separator bottom under the cylinder inboard wall, the annulus between worm gear inlet tube and core pipe flows down along the core inside pipe wall again, flows back to the central field of spiral washer.The drop that falls into central field is bigger because of weight, can separate from central field by action of centrifugal force after being rotated the air-flow acceleration, flies out by the guide vane wheel window, bumps against on the spiral case wall to fall.Flue gas rises along cylindrical shell after the gas-water separation, flows to air-introduced machine by outlet, finally discharges through chimney.

The dedusting of boiler and the construction size of desulfurizer design according to the boiler rated load, and boiler its load in running is not to immobilize, the actual load of boiler is usually less than rated load, if have big difference with rated load, exhaust gas volumn must significantly reduce, the flue gas flow rate that enters the desulfurizing dust-collector central field is reduced greatly, cause the dust-removal and desulfurizing decrease in efficiency, not reach environmental requirement.The utility model is provided with governor motion, can adjust the effective width of guide vane wheel according to payload, remains in the optimum range when making flue gas enter central field, thereby its efficient is remained on the higher level.

Governor motion (also being the suspension arrangement of guide vane wheel) is installed on the big ring flange of core pipe, and pull bar passes ring flange and is connected with pivot pin is active with annulus on the guide vane wheel, and it is suspended on the ring flange.Governor motion can adopt helicitic texture, and pull bar is made screw rod, handwheel is made nut, and seat makes pull bar and handwheel by spiral marking connection on ring flange.Straight line moved about the rotation handwheel can order about screw rod by screw thread, moved up or down thereby drive guide vane wheel, reached the purpose that changes the impeller effective width.

The hitch point of guide vane wheel needs 3-4, regulate with the mode of rotating handwheel, need rotate handwheel one by one, measure stretching out height and it being consistent of screw rod one by one, this method of adjustment only is suitable for manually also cumbersome, if handwheel is become sprocket wheel, with chain several sprocket wheels are linked together, chain drive-belt moves and can drive several sprocket wheels simultaneously and rotate together, thereby make several screw rods together impeller move up or down, if use servo motor to come chain drive-belt to move, can realize Long-distance Control and control automatically.

Governor motion also can adopt hydraulic structure, allows oil cylinder seat drop on the big ring flange of core pipe, and pull bar links to each other with piston, passes big ring flange impeller is suspended on the big ring flange.Move up and down but drive guide vane wheel, also can reach the purpose of adjusting by the hydraulic pressure driven plunger.

Description of drawings

Below with reference to concrete structure, structure of the present utility model and action principle are described in further details.

Fig. 1 is a vertical section of the present utility model schematic diagram

Fig. 2 is the drawing in side sectional elevation of Fig. 1 along the A-A line

Fig. 3 is the drawing in side sectional elevation of Fig. 1 along the B-B line

Fig. 4 is the schematic diagram of governor motion

Fig. 5 is that the E of Fig. 4 is to schematic diagram

Fig. 6 is the schematic diagram that governor motion adopts chain interlock adjustment structure.

Fig. 7 is the schematic diagram that governor motion adopts the hydraulic regulation structure.

Fig. 8 is that the blade of guide vane wheel is reverse structural representation when tilting.

The specific embodiment

With reference to Fig. 1, Fig. 2 and Fig. 3, the utility model is made up of vortex washer (5), worm-gear type moisture trap (1) and the core pipe (3) and the governor motion parts such as (4) that connect both.

The shape of vortex washer is the spitting image of being an actionless blower fan that keeps flat, and it is made up of spiral case and guide vane wheel two large divisions, and mutliblade guide vane wheel (6) is flat on the central authorities of spiral case, transfixion.

Spiral case adopts low-carbon (LC) guiding principle Welding Structure, and it specifically is constructed as follows, and spiral case is made up of upper cover plate (14), linear in the shape of a spiral side plate (13) and the gas approach parts such as (29) of rectangle.Following and the funnel shaped mud bucket (7) of spiral case is welded together, is provided with mud tube (8) below the mud bucket.Mud tube should insert in the pond during operation, mud can be entered the pond on the one hand, plays the water seal effect on the other hand again.Be welded with a circle (17) on the spiral case loam cake (14) and which is provided with ring flange (18), effective for mounting core, preservative treatment need be carried out in spiral case inside.

Guide vane wheel (6) is made up of the chassis (10) of circle, last annulus (12) and many blades (11) between the two, guide vane wheel can adopt corrosion resistant plate Welding Structure or cast iron monoblock cast structure, also can adopt low carbon plate welding, the surface should be anticorrosion when adopting welded-steel plate construction.Guide vane wheel is installed on the central authorities of spiral case, the top of impeller be clipped in the spiral case loam cake circle (17) and and core pipe weldering in the annular space between the circle of one (16).With reference to Fig. 4 and Fig. 5, the last annulus of guide vane wheel is provided with 4 suspension ring (40), links to each other with the pull bar (36) of governor motion, and it is suspended on the big ring flange (19) of core pipe, can order about guide vane wheel by governor motion and move up and down.

The cross section of guide vane wheel blade (11) is a shaped form, and one section curvature of blade exterior is less, more smooth, and section curvature in lining is bigger, the tangent line of the inner end of each blade (33) all with central field in an imaginary concentric circles (32) tangent.The outer end of blade can along flue gas guide vane wheel outside flow aspect tilt, be called forward, as shown in Figure 2.Also can tilt, be called reverse inclination, as shown in Figure 8 towards the opposite direction of flow of flue gas.The angle of blade outer end and tangent to periphery is advisable with 45 °-70 °.The effect that blade is curved surface is, when flue gas by helical duct when guide vane wheel enters central field, to force flue gas to rotate at central field, shown in arrow (35), be separated at central field and work as drop, when tangentially leaving the rotational trajectory of central field, the window that can waltz through guide vane wheel again flies out, shown in arrow (34).The incline direction difference of guide vane wheel blade, its effect is also slightly had any different: with reference to Fig. 8, when forward tilting, the flue gas that enters spiral case will enter central field, flue gas must with carry out rightabout turn back just can stop because action of inertia makes considerable grain be directed to impeller through big slightly dust and water droplet, sink at last in helical duct, do not advance central field, this helps dedusting.When the utility model uses as absorber, when for example in two-stage dust removal and desulfurization, mainly bearing the desulfurization task, guide vane wheel then should adopt reverse inclination, at this moment the air-flow and the water droplet that enter the snail shell coiling passage are easier to enter central field, to have more liquid to mix with gas at central field, this helps the absorption to sulfur dioxide.In the porch of vortex washer, be provided with two upright water inlet pipes (30), on pipe, be drilled with a row or two row's apertures, cleaning solution is through these aperture ejections.

The dust-removal and desulfurizing operation principle of vortex washer is as follows: flue gas tangentially enters helical duct (31) by spiral case inlet (29), enters central field (9) through the distribution and the guiding of guide vane wheel, and flows to the center.Because the guide effect of guide vane wheel blade, promptly rotate after making flue gas enter central field.Rotary speed is accelerated gradually in flowing to the process at center.At flue gas during, the washings that need not to control of feed pipe (30) ejection are disperseed to carry secretly to enter the snail shell coiling passage through spiral case inlet.Some bigger drop grits do not enter central field because inertia is bigger, just fall on the inwall that collides spiral case directly, form the moisture film that flows downward, and sink to the mud bucket, are discharged by mud tube.Numerous less drops are carried secretly by flue gas and are entered central field.Be accelerated to air velocity at central field, also further be broken into atomized liquid simultaneously.

In the flow field, center, fine drop is subjected to the acting in conjunction of centripetal force and centrifugal force simultaneously.The centripetal force pressure differential that draft causes from air-introduced machine, in the narrow and small like this scope of central field the variation of centripetal force very little, can think constant.Centrifugal force then increases with the increase of dropping liquid quality, sharply increases with the increase of rotary speed.Because air-flow rotary speed in flowing to the process at center is accelerated gradually, this centrifugal force that causes being entrained in the drop in the air-flow sharply increases thereupon, when centrifugal force surpasses centripetal force, drop will be separated, the tangential swing-around trajectory that leaves central field, the window that passes guide vane wheel flies out, and falls on the spiral case.Owing to accelerated gradually by outer course center in the rotary speed of central field flue gas, this has just caused between the adjacent about layer air-flow and has had relative motion, for advantage has been created in the mutual gathering that drop is caught between grit and the drop simultaneously.Some are assembled the big drop that forms and are captured dripping than heavy-fluid of more grit by droplet, will be separated from the swirling eddy of central field earlier.The drop that is separated is tangentially leaving swing-around trajectory, passes guide vane wheel and the air-flow that enters and is in the process that rightabout flies out, and is carrying out effectively to the seizure of dust with to the absorption of sulfur dioxide.High speed reverse movement between gas, the liquid constantly upgrades its contact interface, has improved dedusting and desulfurized effect greatly.

By above principle Analysis as can be known, this is practical to have following characteristics: the one, in the vortex washer, exist the reverse movement between cleaning solution and the gas, and speed of related movement is very high, this good liquid gas contact and the quick renewal at interface, improved desulfurized effect greatly, also make simultaneously to the utlity model has unique dedusting function, have special function removing high concentrate dust, sticky ash, ultrafine dust etc.

Through the cleaning flue gases after the washing, carrying the drop that is not separated as yet secretly, through core pipe (3) vertical lifting, enter moisture trap.

The core pipe is between vortex washer and moisture trap, work to connect both and become as a whole, it specifically is constructed as follows: the middle part in core pipe (3) is welded with a big ring flange (19), connect mutually with flange (18) on the spiral case with it, core pipe and spiral case are become one.The infundibulate base plate (21) of the upper end of core pipe and moisture trap is welded together.The lower end of core pipe is concordant with the spiral case loam cake, and is welded with flat ring (15), is welded with circle (16) in the outside of flat ring, and the upper end of circle is welded together with big flange (19).Flat ring (15) make core pipe and guide vane wheel in keeping certain distance between justifying, this is very important apart from size.Because the width dimensions of flat ring has determined the size of central field (9), it is closely related with dust-removal and desulfurizing efficient of the present utility model and circulating resistance, and the width that increases flat ring can improve dedusting and desulfuration efficiency, but the also increase thereupon of its circulating resistance.The width that reduces flat ring can reduce circulating resistance, cut down the consumption of energy, but its dust-removal and desulfurizing efficient also decreases.Because the big young pathbreaker of flat ring width directly determines the appearance and size of guide vane wheel and spiral case, strengthen the width of flat ring simultaneously, guide vane wheel and spiral case size will strengthen thereupon, therefore should be very prudent to the selection of flat ring width size.

The effect of core pipe is to connect the vortex washer and moisture trap makes it to become one, and provides circulation passage for flue gas and cleaning solution simultaneously.The cleaning flue gases that is cleaned in the vortex washer flows to moisture trap through the core pipe, and the cleaning solution that is separated in moisture trap flows back to the vortex washer through the core pipe again.

Being constructed as follows of worm-gear type moisture trap: the worm-gear type moisture trap is made up of shell and worm gear (2) two large divisions.Shell is made up of cylinder (26), loam cake (27) and base plate (21) etc.Cylinder (26) is welded together with top taper type top cover (27).Be provided with exhanst gas outlet (28) in top cover central authorities, the following and funnel shaped base plate (21) of cylinder uses flange coupling, base plate to be welded on the core pipe (3).The shell of moisture trap adopts welded-steel plate construction, and its inside is anticorrosion.

Bottom at moisture trap, laying gas-water separation worm gear (2), it is by inverted conical top cover (25), a plurality of blades (24) and infundibulate bottom plate (23) and air inlet pipe (20) are formed, whole worm gear can adopt the corrosion resistant plate Welding Structure, also available general steel plate welding, but need carry out preservative treatment.Air inlet pipe (20) is thinner than core pipe (3), and it is inserted in the core pipe, forms a circumferential weld with the core pipe.The water of being separated by moisture trap flows down through circumferential weld thus, returns the vortex washer again through the core pipe.The coning angle of worm gear top cover is advisable with 120 °-150 °.The system of selection of the coning angle of infundibulate bottom plate is: earlier the exhaust gases passes of worm gear is designed to the constant speed passage, and then determines according to calculating.

Its cross section of the blade of worm gear (24) is a shaped form, and section curvature is bigger in the blade, and outer section curvature is less, and the inner end is approaching radially, and the angle of outer end and tangent to periphery is advisable with 30 °-45 °.Worm gear (2) is placed on several gripper shoes (22), and is fixed on the base plate (21) of housing.

The operation principle of moisture trap is as follows: flue gas enters separator worm gear (2) by the core pipe through air inlet pipe (20), after the blade guiding flows out, will in gas-water separation, form swirling eddy, the fine drop of being carried secretly in the flue gas is by action of centrifugal force, will be thrown on the shell of separator and flow down, and form moisture film.When having water droplet to be thrown on the shell again, moisture film will be caught it.The water that is separated flows down along shell, flows to the core pipe through base plate, flows down along the core pipe again, drops onto vortex washer central field.The water droplet that falls quickens at the air-flow that central field is rotated, and when its speed reaches one regularly, will fly away from central field under action of centrifugal force, flies out through the guide vane wheel window.Therefore needn't the water of separating be discharged smoothly for moisture trap is provided with sluice pipe especially.

Because the separative efficiency of moisture trap is very high, it is hereby ensured that flue gas passes through the utility model dust-removal and desulfurizing after, be not with water band mist, it can not bring harm to air-introduced machine flue etc., this is one of outstanding advantage of the utility model.

With reference to Fig. 1, Fig. 4 and Fig. 5, the utlity model has governor motion, by changing the effective width of guide vane wheel, regulate dust-removal and desulfurizing efficient and resistance performance.Concrete structure is as follows: governor motion is made up of the suspension ring parts such as (40) on threaded pull bar (36), handwheel (37), circle Xiao (39) and the guide vane wheel.The suspension ring of guide vane wheel (40) link with pull bar (36) with circle Xiao (39), with pull bar and handwheel (37) guide vane wheel are suspended on the big ring flange (19).Handwheel and pull bar are by spiral marking connection, and the rotation handwheel can order about pull bar drive guide vane wheel by screw thread and move up and down, thereby change the effective width of impeller, realize the adjusting to desulfurization dust-removing efficiency and resistance performance.When flue gas flow one timing, upwards promote impeller, the impeller effective width is reduced, can improve the flow velocity that flue gas enters central field, thereby improve its dust-removal and desulfurizing efficient, its circulating resistance is increased.Otherwise impeller is moved down, can increase the impeller effective width, reduce the flow velocity that flue gas enters central field, circulating resistance is reduced, and dust-removal and desulfurizing efficient also decreases.The dedusting of boiler and the construction size of desulfurizer design according to the boiler rated load, and boiler its load in running is not to immobilize, the actual load of boiler is usually less than rated load, if have big difference with rated load, will certainly make the dust-removal and desulfurizing decrease in efficiency, not reach environmental requirement.Owing to the utlity model has governor motion, can adjust the guide vane wheel effective width according to payload, the optimum flow rate that enters central field with the maintenance flue gas is constant, thereby makes its efficient remain on higher level.

When adopting all handwheels and regulating, need rotate handwheel one by one, and will measure pull bar one by one and stretch out height, several pull bars are consistent, such adjusting only is suitable for manually, and adjusting is also cumbersome.

With reference to Fig. 6, replace handwheel with sprocket wheel (41), and four sprocket wheels are linked together with chain (42), chain drive-belt moves, can drive four sprocket wheels and rotate simultaneously, move up or down, reach the purpose that changes the guide vane wheel effective width thereby can make four pull bars spur guide vane wheel synchronously.Raise clothes motor chain drive-belt when use and move when regulating, can adapt to automatic control.

With reference to Fig. 7, governor motion also can adopt hydraulic-driven.Hydraulic cylinder is fixed on the big ring flange (19), connects mutually with the suspension ring (40) of guide vane wheel, drive guide vane wheel with piston (44) and move up or down the purpose that reaches adjusting impeller effective width with piston rod (45).When control valve makes hydraulic oil enter hydraulic cylinder by piston (44) below (top oil extraction), just can order about on the piston pulling guide vane wheel and move, if make hydraulic cylinder piston top oil-feed (below oil extraction), just can order about piston drive guide vane wheel moves down, thereby can reach the purpose of regulating the guide vane wheel width, the employing hydraulic way is regulated, and adjusting work is become easily, and be convenient to automatic control.

Claims (9)

1, a kind of smoke desulfurization dust remover, particularly a kind of vortex wet method sulphur removing and dust removing device is characterized in that: it is made up of vortex washer (5), core pipe (3), worm-gear type moisture trap (1) and governor motion critical pieces such as (4).

A, described vortex washer mainly are made up of spiral case and guide vane wheel (6).

B, described core pipe are formed by core pipe (3) and the big flange (19) that is welded in core pipe middle part and with flat ring (15) that is welded in core pipe lower end and the circle (16) that is welded in outside the flat ring.

C, described worm-gear type moisture trap are made up of shell and worm gear (2).

D, described governor motion are made up of the suspension ring parts such as (40) on threaded pull bar (36), handwheel (37), circle Xiao (39) and the guide vane wheel, the suspension ring of guide vane wheel (40) link with pull bar (36) with circle Xiao (39), pull bar and handwheel (37) are suspended on guide vane wheel on the big ring flange (19), handwheel and pull bar are by spiral marking connection, the rotation handwheel can order about the pull bar impeller by screw thread and move up and down, thereby changes the effective width of impeller.

2, by the described vortex wet method sulphur removing and dust removing of claim 1 device, the shell that it is characterized in that the vortex washer is made up of upper cover plate (14), spiral side plate (13) and rectangular inlet parts such as (29), spiral case bottom and the weldering of funnel shaped mud bucket are one, the loam cake of spiral case is welded with circle (17), be welded with ring flange (18) on it, spiral case adopts welded-steel plate construction, and anti-corrosion treatment is made in inside.

3, by the described vortex wet method sulphur removing and dust removing of claim 1 device, it is characterized in that: guide vane wheel (6), formed by the chassis (10) of circle, last annulus (12) and a plurality of blades (11) between the two, guide vane wheel can adopt the corrosion resistant plate Welding Structure, also can adopt the cast iron monoblock cast, also can adopt the low carbon steel plate Welding Structure, when adopting welded-steel plate construction, the surface should be anticorrosion.

4, by the described vortex wet method sulphur removing and dust removing of claim 1 device, the cross section that it is characterized in that the blade (11) of guide vane wheel is a shaped form, one section curvature of blade exterior is less, more smooth, in the section curvature bigger, the tangent line of each blade inner end (33) all with central field (9) in an imaginary concentric circles (32) tangent, the outer end of blade and the angle of tangent to periphery are advisable with 45 °-70 °.The outer end of blade can tilt along the direction that flue gas flows in the guide vane wheel outside, is called forward.

5, by the described vortex wet method sulphur removing and dust removing of claim 1 device, it is characterized in that the outer end of guide vane wheel blade (11) also can be opposite direction inclination with the air-flow of guide vane wheel outside, be called reverse inclination.

6, by the described vortex wet method sulphur removing and dust removing of claim 1 device, the shell that it is characterized in that the worm-gear type moisture trap is by circular cylinder body (26), formed with top taper type top cover (27) and funnel shaped bottom (21), on top cover, be provided with exhanst gas outlet (28), circular cylinder body and following infundibulate bottom employing flange coupling, shell adopts the low carbon steel plate Welding Structure, and inner surface carries out preservative treatment.

7, by the described vortex wet method sulphur removing and dust removing of claim 1 device, the worm gear that it is characterized in that moisture trap is made up of inverted conical top cover (25), a plurality of blade (24) and infundibulate bottom plate (23) and air inlet pipe (20), the central angle of conical top cover is to adopt 120 °-150 ° to be advisable, its cross section of the blade of worm gear (24) is a shaped form, the inner end curvature of blade is bigger, outer section curvature is less, is advisable with 30 °-45 ° with the angle of tangent to periphery for outer section near radially in the inner end.

8, the described vortex wet method sulphur removing and dust removing of claim 1 device, it is characterized in that governor motion can use sprocket wheel (41) to replace handwheel, and four sprocket wheels are bound up with chain (42), chain drive-belt moves, can drive four sprocket wheels rotates simultaneously, move up or down thereby make four pull bars spur guide vane wheel synchronously, reach the purpose that changes the guide vane wheel effective width.

9, according to the described vortex wet method sulphur removing and dust removing of claim 1 device, it is characterized in that governor motion also can adopt hydraulic-driven, hydraulic cylinder (43) is fixed on the big ring flange (19), connect mutually with the suspension ring (40) of guide vane wheel with piston rod (45), drive guide vane wheel with hydraulic oil driven plunger (44) and move up or down, to reach the purpose of regulating the impeller effective width.

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