CN2432190Y

CN2432190Y - Double-screw humidifying unloading machine

Info

Publication number: CN2432190Y
Application number: CN 00232779
Authority: CN
Inventors: 王洪; 侯振洲
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-05-12
Filing date: 2000-05-12
Publication date: 2001-05-30
Anticipated expiration: 2010-05-12

Abstract

The utility model relates to an improved double-screw humidifying and ash unloading machine. The utility model uses a barrel type horizontal machine body with a U-shaped cross section. The interior of the machine body is provided with two screw axles with the same structure. The two screw axles are in axial and parallel distribution. The screw stirring fins of the two screw axles are in alternative arrangement. The center section of each axle is gradually thickened, and then the ash propelling and compression trend is formed. The interior of the machine body is provided with an ash blocking plate which divides the machine body into a propelling, compression and humidification part and a stirring and ash removing part. The screw stirring fin of the stirring part is designed into the intermittent structure with screw-pitch change, and the tail end of the screw stirring fin of the stirring part is additionally provided with a reverse rotation screw stirring fin, and then the effective stirring and ash removing functions are formed. The humidification of the complete machine is uniform, the adhesion phenomenon is not provided, the processing ability is obviously enhanced, and the utility model is a beneficial improvement on the double-screw humidifying machine.

Description

The double helix Humidifying ash discharging machine

The utility model belongs to a kind of mixture operation machinery, specifically is used for a kind of after-treatment device of environmental protection dedusting operation, particularly be applied in large-sized boiler supporting among.

Humidifying ash discharging machine is the essential environmental protection isolated plant of in the large-sized boiler dust removal process.A large amount of dry ashes has only even adding moisture content just can avoid reentrainment of dust after collecting, and is transported to the occasion of utilizing again.The very thin not hydrophilic characteristic of coal dust ash makes and adds water treatment and have cooresponding difficulty.Humidifying ash discharging machine commonly used has two kinds of series of single, double axle in producing at present, its basic structure all is by a horizontal tubular fuselage, fuselage is provided with the ash outlet behind dry ash inlet and the humidification, fuselage is provided with and adds water injector, be provided with the screw shaft of propelling and beating action in the fuselage, and supporting electrical motor and speed-changing mechanism and frame composition.Dry ash advances the Bian Jiashui that advances of bottom at screw shaft after ash inlet is gone into fuselage, add stirring.As single shaft series, be mostly in its structure that single shaft stirs formula, or single shaft forms agent structure by the rack formula of helical arrangement, along with stirring rotation dry powder is pushed fuselage, revolve to hit at rack and make grey mixing of moisture content and dry powder reach the humidification purpose in the stirring.This structure often causes the bonding a large amount of wet ashes on screw shaft or the inner tube wall, and formation stall of a specified duration is so often need cleaning.Even so, stall often has the normal operation that takes place and influenced humidifier greatly.Take the oar blade type cross-compound arrangement in the twin axle structure at present, the limit advances more, and the limit is stirred and trembled, speed is slower, exists the phenomenon of humidification limit, limit airborne dust, and stirs inhomogeneous, go up to do down and wet, and have the wet ash of a root adhesion to cause processing capacity to descend equally, even can not turn round normally.Adopted double helix screw feeder structure through the humidifier that improves the back twin axle, the double-axis reverse running increases the degree of uniformity of humidification, but still unavoidably has axle root adhesion and the not high defective of processing capacity and be further improved.

Goal of the invention of the present utility model is further twin axle spiral Humidifying ash discharging machine to be carried out structural development, particularly to the improvement of axle construction to improve humidification degree of uniformity and processing capacity, thoroughly solve an axle root adhesion problems, accomplish that long-term trouble free moves continuously.

Improvement project of the present utility model is mainly carried out at screw shaft structure.Adopted two screw shafts of structure unanimity on the whole, axially parallel stirs the wing spiral and is interspersed.Every axle interlude all is front fine and rear thickly to be cone-shaped; Also can take spiral fashion to stir pre-large post-small the gradually changing of wing spiral shell square.Back segment stirs wing and is interrupted distribution, and it is opposite that latter end stirs the wing rotation direction.Why above structure is set, be at interlude because the taper shaft structure forms the space diminishes gradually, make that ashes is compressed in the process that advances, make fluffy ashes increase in density.Thereby impel the ashes after the interlude compression to form the capillary pipe seam, help moisture and in the dry powder ash, spread infiltration.Simultaneously, be provided with hawk, can be favourable prevent dry powder ash and back segment space path compression the time, prevent reentrainment of dust at the fuselage interlude in order to form effective compression space.After ashes was advanced into the stirring section from the compression humidifier section, because continuous helical stirs wing and is changed to interrupted flight suddenly, clearance envelope strengthened, and makes its easier breaing up, and mixed with the even of ashes through stirring formation water.Terminal reverse screw is for the ashes after stirring evenly being compiled at ash hole top formation spiral, making powder delivery freely to increase the process load of this machine.In a word, through above improvement.Not only add the water mixed effect and improve greatly, and because humidifier section stirs the effect of wing variable-pitch and adopt homodromal measure can make the displacement of break-in repeatedly of stirring formation logistics between the wing at the progradation diaxon.Can prevent effectively that so moisture wet ash is in the bonding of stirring wing spiral root.Particularly the design takes the homodromal operation plan of diaxon, what be interspersed stirs the wing spiralization along the reciprocal scraping of axle root relatively, cause peeling off of adhesion ashes, thereby realized that axis body has thoroughly solved bonding problem from knot, improves the reliability of complete machine greatly.

How further specify goal of the invention of the present utility model below in conjunction with accompanying drawing realizes:

Fig. 1 is the utility model schematic appearance.

Fig. 2 is a structural representation of the present utility model.

Fig. 3 is the structural representation of ash damper.

Wherein 1 represent the tubular fuselage, 1A represents ash inlet, and 1B represents ash hole, 2 representatives add water injector, and 3 represent screw shaft, and the wing spiral is stirred in the 3A representative, the wing flight is intermittently stirred in the 3AA representative, on behalf of reverse screw, 3AB stir wing, and 4 represent motor, and 5 represent speed-changing mechanism, 6 represent frame, 7 represent ash damper, and 7A represents axis hole, and 8 represent the multidiameter shaft part.

From accompanying drawing as can be seen, the fuselage cross-section shape that takes the shape of the letter U, and waist partially after, promptly the end of screw shaft reduced diameter portion 8 is provided with the ash damper 7 of a double circular hole 7A.This ash damper 7 is divided into fuselage 1 the propelling humidifier section and stirs ash discharge section two parts.And formed powder ash constricted zone before the ash damper 7.Because the cause of reducing, the powder ash is compressed and adds reality.Advance the humidifier section end to set up in the forward fuselage of ash damper 7 and add water injector 2, the compression dust of increase in density fully soaks into water by capillary phenomenon, has strengthened the mixing between water and the powder ash.

In order to strengthen compression effects, can also be from 8 beginnings of stage casing multidiameter shaft, make the spiral shell square that stirs the wing spiral by slowly changing to little greatly, it not only can further compress the space of multidiameter shaft 8 ends, make fluffy powder ash is implemented effectively compression, also help the diaxon interlaced helical and stir wing and form relative axially reciprocating, promote humidification more even effective, when particularly the structure of variable-pitch extends to the later stirring section of ash damper 7.Interrupted spiral stirs not only can effectively stir ash, water of fin 3AA to be mixed, and can be formed on spiral and stir reciprocal relative displacement on wing root, the axial plane, scraping prunes is bonded at the wet ash of a root, prevents to form the factor that adhesion increases the normal operation that influences machine.The scope principle that the spiral shell square changes is the difference of maximum spiral shell square and minimum spiral shell square, is not more than wherein minimum spiral shell square.Interlude axle reducing forms tapering axle 8, and the value of its axial cone degree should be 1: 8～between 1: 12, i.e. the powder ash compression process that can match and realize ideal with the bending moment spiral.

The reason that latter end takes interrupted spiral to stir wing 3AA is the fltting speed that adds ashes behind the water in order to slow down, strengthening the stirring dynamics makes water realize more perfect the mixing with ash, avoid being mingled with dry ash or do wet irregular phenomenon and take place, the interval ratio that interrupted spiral stirs wing 3AA is 1: 1～1: 1.5, be that interrupted space and spiral stir that the axial width ratio is 1: 1～1: 1.5 between the fin 3AA, each developed width that stirs fin 3AA is not more than 1/8 spiral shell square.

Being positioned at terminal reverse screw 3AB is the humidification ashes generation counter motion that is advanced into tail cone in order to make, and produces vortex at the grey 1B of outlet place, to help preventing dead angle incrustation and to strengthen also favourable smooth ash discharge of stirring dynamics.The width of reverse screw is not more than a spiral shell square for well.

The Humidifying ash discharging machine that adopts above structure to make, through test of many times its to add water even, no dry ash is mingled with and does wet uneven phenomenon, can self-cleaningly eliminate adhesion phenomenon, it is handled the ash amount and is greatly improved.Particularly its fault rate is low, and continuous operation time is long, and is simple to operate, saves the energy, and value and the prospect applied in the industry are arranged.

Claims

1, a kind of double helix wetting stirrer, horizontal tubular fuselage (1) is provided with ash inlet (1A), ash hole (1B) and adds water injector (2), be provided with the screw shaft (3) that advances with beating action in the fuselage (1), complete machine is supporting motor (4), speed-changing mechanism (5) and frame (6), it is characterized in that being provided with in the fuselage two root architectures identical axially horizontally stir the staggered screw shaft of wing, screw shaft interlude (8) is front fine and rear thick to be cone-shaped, latter end stirs wing (3AA) and is interrupted at interval distribution, and it is reverse screw that end stirs wing (3AB).

2, according to the said Humidifying ash discharging machine of claim 1, the cross-sectional plane that it is characterized in that the tubular fuselage shape that takes the shape of the letter U, the stage casing is provided with the ash damper (7) of a double circular hole (7A) after partially in the fuselage, whole fuselage (1) is divided into advance humidifier section and stir the ash discharge section.

3,, it is characterized in that the front portion that humidification nozzle (2) is arranged on ash damper (7) is the rear portion that fuselage (1) advances humidifier section according to the said Humidifying ash discharging machine of claim 1.

4, according to the said Humidifying ash discharging machine of claim 1, it is characterized in that stirring wing spiral (3A) on the every axle, its spiral shell square begins pre-large post-small progressively the variation and forms the variable-pitch structure from the stage casing.

5,, it is characterized in that the spiral shell square changes principle and is not more than wherein minimum spiral shell square value for maximum difference to minimum according to the said Humidifying ash discharging machine of claim 4.

6,, it is characterized in that the taper value of the variation formation of stage casing multidiameter shaft (8) is 1: 8～1: 12 according to the said Humidifying ash discharging machine of claim 1.

7, according to the said Humidifying ash discharging machine of claim 1, its interrupted interval of spiral (3AA) that it is characterized in that intermittently distributing is than being 1: 1～1: 15, and each stirs fin width and is not more than 1/8 spiral shell square.

8,, it is characterized in that the latter end antispin stirs the distribution length that wing (3AB) is no more than a spiral shell square according to the said Humidifying ash discharging machine of claim 1.

9,, it is characterized in that the work rotation direction of two screw shafts is identical according to the said Humidifying ash discharging machine of claim 1.