Using the blender and wet method fume desulfurizing system of composite ceramics reparation
Technical field
The utility model relates to agitating device technical fields, more particularly, to a kind of blender using composite ceramics reparation
And wet method fume desulfurizing system.
Background technique
Desulphurization system is applied earliest in the flue gas system of thermal power plant, due to containing element sulphur in coal, is held in burning
It is also easy to produce sulfur dioxide, to reduce the pollution to environment, national environmental protection policy is responded, needs the calcium base etc. of the element sulphur in coal
Method is fixed to become solid, and to prevent pollution of the sulfur dioxide of burning generation to atmosphere, and Wet Flue Gas Desulfurization Technology is
A kind of most desulfurization technology of thermal power plant's application.Wet desulphurization is that boiler smoke enters in FGD device after electric precipitation is handled, former
Baffling comes into full contact with the slurries sprayed upwards after flue gas enters absorption tower, and flue gas is cooled down by slurries and reaches saturation, cigarette
The acid ingredients such as the sulfur dioxide in gas are absorbed, then are flowed in series through demister and removed contained droplet, washed and purification cigarette
Air-flow goes out absorption tower and enters smoke stack emission.
Currently, Wet Limestone-desulfurization of gypsum technique is the leading technology of Power Plant in China flue gas desulfurization, absorption tower
It is the core equipment of wet desulphurization device.Lime stone slurry carries out countercurrent washing to flue gas in absorption tower, sprays through atomizer
Limestone slurry drop out is reacted with the sulfur dioxide in flue gas, generates soluble calcium sulfite and calcium bisulfite, and
It is flowed into slurry pool with fine granularity, oxidation fan sprays into oxidation air in slurry pool, under the action of blender, makes Asia
Calcium sulfate and calcium bisulfite almost all force oxidation to generate gypsum crystallization.Slurries are discharged with gypsum discharge pump, are sent to stone
Cream cyclone carries out concentration and gradation, finally obtains gypsum.
Blender is located at the lower part of slurry pool, is the important component for guaranteeing desulphurization system and operating normally.Blender can be prevented
Only solid particle precipitates in slurry pool, it is ensured that slurries can be uniformly delivered to dewatering system, avoid slurries in absorption tower heavy
Manufacture forming apparatus damage, and the diffusion of oxidation air reinforced, promote calcium sulfite oxidation and gypsum crystal at
Long and lime stone dissolution, it is low to avoid the insufficient utilization rate for causing lime stone of oxidation, influences desulfuration efficiency and gypsum quality.
It since the slurry content in absorption tower is in acidity, meets with steel, it may occur that chemical reaction generates sulfate, Asia
Sulfate or other compounds, cause chemical attack, as at gap, weld seam or surface defect at the special construction, due to anoxic,
The comprehensive function of the reasons such as hydrolysis and ion diffusion, causes high local acid environment, produces between the other parts of metallic matrix
Raw potential difference forms primary battery, to cause electrochemical corrosion, and contains solid particle in the slurries that spray tube nozzle sprays, makes
It obtains solid particle and metal surface is flowed through with certain flow velocity, erosion corrosion can be generated to absorption tower tower wall and other internals, due to
Blender is located at the lower part of slurry pool, necessarily has friction, the corrosion of particulate matter, to destroy the blunt of mixing arm metal surface
Change film, causes the damage of blender, affect the normal operation of desulphurization system.
Utility model content
The purpose of this utility model is to provide a kind of blender using composite ceramics reparation and wet process of FGD systems
System, be easy to cause abrasion and corrosion to solve the blade of blender existing in the prior art, influences the normal work of desulphurization system
The technical issues of industry.
Blender provided by the utility model using composite ceramics reparation includes agitating paddle, the middle part with the agitating paddle
Connected and agitating shaft and the one end of the agitating shaft far from the agitating paddle perpendicular to the plane setting where the agitating paddle
The connected driving device for driving the agitating shaft rotation, the mechanically-sealing apparatus being sheathed on the agitating shaft and with
The mechanically-sealing apparatus is connected and encloses set on the outside of the mechanically-sealing apparatus for the blender to be installed on suction
Receive the rack of tower;
The surface of the agitating paddle is coated with composite ceramic coat, and the agitating shaft is made of alloy steel material.
Further, the agitating paddle includes the wheel hub being connected with the end of the agitating shaft and the week along the wheel hub
To the multiple helical blades being uniformly arranged;
Each helical blade is provided with arc deflector far from the end of the wheel hub.
Further, the mechanically-sealing apparatus includes the axle sleeve being sheathed on the agitating shaft, one with the axle sleeve
It holds the rotating ring abutted, the stationary ring abutted with the rotating ring far from one end of the axle sleeve and is moved set on the axle sleeve far from described
The positioning ring of one end of ring;
The positioning ring is arranged along the direction far from the agitating paddle, also, leads between the positioning ring and the axle sleeve
Overdrive block locking.
Further, the material of the rotating ring is dry operating graphite annulus, and the material of the stationary ring is pressureless sintering silicon carbide
Ring.
Further, the driving device include driving motor and respectively with the output end of the driving motor and described
The connected speed reducer of agitating shaft.
Wet method fume desulfurizing system provided by the utility model including absorption tower and is set to the lower part on the absorption tower
The blender using composite ceramics reparation as described in any one of above-mentioned technical proposal.
Further, circumferential direction of the blender along the absorption tower is evenly arranged with multiple;
Angle between the axis and horizontal line of each blender is 10 °, and the axis of each blender is in water
Angle between the projection of plane and the radial direction on the absorption tower is 4-12 °.
Further, axial direction of the blender along the absorption tower is evenly arranged with multiple;
It is uniformly staggered between the multiple blenders being arranged on adjacent plane.
Further, it is provided with backplate in the absorption tower, the backplate is set to described using composite ceramics reparation
The top of blender;
The backplate is cellular grid backplate, also, the backplate is obliquely installed to the direction close to the agitating paddle.
Further, the shape of the backplate is convex;
It is greater than the backplate positioned at the agitating shaft top positioned at the width of the backplate on the agitating paddle top
Width.
Blender provided by the utility model using composite ceramics reparation includes agitating paddle, agitating shaft, driving device, machine
Tool sealing device and rack, agitating shaft are connected with agitating paddle, also, agitating shaft is perpendicular to the plane and stirring where agitating paddle
The middle part of paddle is connected, and driving device is connected with agitating shaft far from one end of agitating paddle, is the rotation of agitating shaft by driving device
Driving force is provided, and agitating shaft is made to drive agitating paddle rotation, to realize agitating function.Since blender passes through absorption tower and inhales
The slurry pool connection in tower is received, to avoid slurries from leaking, mechanically-sealing apparatus is arranged on agitating shaft, for being risen to agitating shaft
To good sealing function, slurries is avoided to be leaked by agitating shaft, for the installation convenient for mechanically-sealing apparatus and driving device, in machine
The outside of tool sealing device is enclosed equipped with rack, and rack is connected with mechanically-sealing apparatus, enables blender by the way that rack is arranged
It is installed on absorption tower, guarantees the normal operation of desulphurization system.
Since blender is located at the lower part of slurry pool, agitating paddle is easy abrasion and corrosion by slurries, to avoid stirring
Paddle well damage cannot achieve the function of blender, influence the normal operation of desulphurization system, and the surface of agitating paddle is coated with multiple
Ceramic coating is closed, agitating shaft is made of alloy steel material.Composite ceramic material is using modified resin as main material, with ceramic material
Material is mixed according to a certain percentage under vacuum conditions such as silicon carbide, silica, zirconium oxide, and being formed has height resistance to
Mill, high rigidity, high-bulk-density, highly corrosion resistant material be for being painted on the surfaces such as metal, offset plate, glass reinforced plastic, timber
Matrix provides good wearability and anti-corrosive properties.Slurries are effectively reduced by coating composite ceramic coat on the surface of agitating paddle
To the sour corrosion of agitating paddle, abrasion and cavitation erosion, agitating paddle is made not to be damaged, to improve the use longevity of blender
Life, ensure that the normal operation of desulphurization system, since agitating shaft is lighter compared with the abrasion of agitating paddle, using wear-resisting and corrosion resistance
Preferable alloy steel material can guarantee that agitating shaft has preferable service performance, reduce cost.
Detailed description of the invention
It, below will be right in order to illustrate more clearly of specific embodiment of the present invention or technical solution in the prior art
Specific embodiment or attached drawing needed to be used in the description of the prior art are briefly described, it should be apparent that, it is described below
In attached drawing be that some embodiments of the utility model are not paying creativeness for those of ordinary skill in the art
Under the premise of labour, it is also possible to obtain other drawings based on these drawings.
Fig. 1 is the structural schematic diagram of the blender provided by the embodiment of the utility model using composite ceramics reparation;
Fig. 2 is the knot of the mechanically-sealing apparatus of the blender provided by the embodiment of the utility model using composite ceramics reparation
Structure schematic diagram;
Fig. 3 is the structural schematic diagram of wet method fume desulfurizing system provided by the embodiment of the utility model;
Fig. 4 is the structural plan of the blender of wet method fume desulfurizing system provided by the embodiment of the utility model;
Fig. 5 is the structural schematic diagram of the backplate of wet method fume desulfurizing system provided by the embodiment of the utility model.
Icon:100- agitating paddle;200- agitating shaft;300- driving device;400- mechanically-sealing apparatus;500- rack;
The absorption tower 600-;110- wheel hub;120- helical blade;130- arc deflector;310- driving motor;320- speed reducer;410-
Axle sleeve;420- rotating ring;430- stationary ring;440- positioning ring;450- drive block;610- backplate.
Specific embodiment
The technical solution of the utility model is clearly and completely described below in conjunction with attached drawing, it is clear that described
Embodiment is the utility model a part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention, originally
Field those of ordinary skill every other embodiment obtained without making creative work belongs to practical
Novel protected range.
In the description of the present invention, it should be noted that such as occur term " center ", "upper", "lower", " left side ",
" right side ", "vertical", "horizontal", "inner", "outside" etc., indicated by orientation or positional relationship be orientation based on the figure or
Positional relationship is merely for convenience of describing the present invention and simplifying the description, rather than the device or member of indication or suggestion meaning
Part must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as limiting the present invention.
In addition, such as there is term " first ", " second ", " third " are used for description purposes only, be not understood to indicate or imply opposite
Importance.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, such as there is term
" installation ", " connected ", " connection " shall be understood in a broad sense, for example, it may be fixedly connected, may be a detachable connection or one
Connect to body;It can be mechanical connection, be also possible to be electrically connected;It can be directly connected, it can also be indirect by intermediary
It is connected, can be the connection inside two elements.For the ordinary skill in the art, on being understood with concrete condition
State the concrete meaning of term in the present invention.
Embodiment 1 and embodiment 2 are described in detail with reference to the accompanying drawing:
Embodiment 1
As depicted in figs. 1 and 2, a kind of blender using composite ceramics reparation, including agitating paddle are present embodiments provided
100, the agitating shaft 200 and agitating shaft for being connected with the middle part of agitating paddle 100 and being arranged perpendicular to the plane where agitating paddle 100
The connected driving device 300 for driving agitating shaft 200 to rotate in 200 one end far from agitating paddle 100 is sheathed on agitating shaft
Mechanically-sealing apparatus 400 on 200 and it is connected with mechanically-sealing apparatus 400 and encloses set on the outside of mechanically-sealing apparatus 400
For blender to be installed on to the rack 500 on absorption tower 600, specifically:
The surface of agitating paddle 100 is coated with composite ceramic coat, and agitating shaft 200 is made of alloy steel material.
Blender includes agitating paddle 100, agitating shaft 200, driving device 300, mechanically-sealing apparatus 400 and rack 500,
Agitating shaft 200 is connected with agitating paddle 100, also, agitating shaft 200 is perpendicular to the plane and agitating paddle 100 where agitating paddle 100
Middle part is connected, and driving device 300 is connected with agitating shaft 200 far from one end of agitating paddle 100, is stirring by driving device 300
The rotation of axis 200 provides driving force, and makes agitating shaft 200 that agitating paddle 100 be driven to rotate, to realize agitating function.Due to stirring
It mixes device to be connected to across absorption tower 600 with the slurry pool in absorption tower 600, to avoid slurries from leaking, be arranged on agitating shaft 200
There is mechanically-sealing apparatus 400, for playing good sealing function to agitating shaft 200, slurries avoided to be leaked by agitating shaft 200,
For the installation convenient for mechanically-sealing apparatus 400 and driving device 300, enclose in the outside of mechanically-sealing apparatus 400 equipped with rack
500, rack 500 is connected with mechanically-sealing apparatus 400, enables blender to be installed on absorption tower by the way that rack 500 is arranged
On 600, guarantee the normal operation of desulphurization system.
Since blender is located at the lower part of slurry pool, agitating paddle 100 is easy abrasion and corrosion by slurries, to avoid stirring
Mixing 100 well damage of paddle cannot achieve the function of blender, influence the normal operation of desulphurization system, the surface of agitating paddle 100
Coated with composite ceramic coat, agitating shaft 200 is made of alloy steel material.Composite ceramic material is with modified resin for main material
Material, is mixed according to a certain percentage under vacuum conditions with ceramic material such as silicon carbide, silica, zirconium oxide etc.,
The material with high abrasion, high rigidity, high-bulk-density, highly corrosion resistant is formed, for being painted on metal, offset plate, glass reinforced plastic, wood
The surfaces such as material provide good wearability and anti-corrosive properties for matrix.By coating composite ceramic coat on the surface of agitating paddle 100
Slurries are effectively reduced to the sour corrosion of agitating paddle 100, abrasion and cavitation erosion, agitating paddle 100 is made not to be damaged, thus
The service life for improving blender ensure that the normal operation of desulphurization system, the mill due to agitating shaft 200 compared with agitating paddle 100
Damage is lighter, can guarantee that agitating shaft 200 has preferable usability using the preferable alloy steel material of wear-resisting and corrosion resistance
Can, reduce cost.
In the optinal plan of the present embodiment, agitating paddle 100 include the wheel hub 110 being connected with the end of agitating shaft 200 and
The multiple helical blades 120 being uniformly arranged along the circumferential direction of wheel hub 110, are easily achieved by multiple helical blades 120 to slurry pool
Stirring, avoid solid particle in the deposition of slurries bottom of pond portion, also, end of each helical blade 120 far from wheel hub 110 is equal
It is provided with arc deflector 130, arc deflector 130 can be improved the wearability of 120 end of helical blade, improve helical blade
120 service life, while there is diversion function, it is more easily implemented the function of blender, more efficient, mixing effect is more
It is good.
In a kind of specific embodiment, mechanically-sealing apparatus 400 include the axle sleeve 410 being sheathed on agitating shaft 200,
It the rotating ring 420 that is abutted with one end of axle sleeve 410, the stationary ring 430 abutted with rotating ring 420 far from one end of axle sleeve 410 and is set to
The positioning ring 440 of the one end of axle sleeve 410 far from rotating ring 420, rotating ring 420 rotate under the drive of axle sleeve 410 with agitating shaft 200,
The sealing function that stationary ring 430 is closely abutted with rotating ring 420 to realize mechanically-sealing apparatus 400, positioning ring 440 is along far from agitating paddle
100 direction setting, also, locked between positioning ring 440 and axle sleeve 410 by drive block 450, guaranteed by positioning ring 440
Rotating ring 420 and stationary ring 430 be able to maintain it is close abut, provide preferable drive to the movement of rotating ring 420 using drive block 450
Power reduces the abrasion to agitating shaft 200, so that the function of mechanically-sealing apparatus 400 be better achieved.
Further, the material of rotating ring 420 is dry operating graphite annulus, and the material of stationary ring 430 is pressureless sintering carborundum ring.
Rotating ring 420 can reduce the friction between rotating ring 420 and axle sleeve 410 using dry operating graphite annulus, reduce the damage to axle sleeve 410
It is bad, while rotating ring 420 being made to have good corrosion resistance.Stationary ring 430 uses pressureless sintering carborundum ring, pressureless sintering carbonization
Silicon has better wear-resisting and corrosion resistance than common silicon carbide, can guarantee that mechanically-sealing apparatus 400 has good sealing
Performance.
In the optinal plan of the present embodiment, driving device 300 include driving motor 310 and respectively with driving motor 310
The speed reducer 320 that is connected with agitating shaft 200 of output end.Driving device 300 is realized using driving motor 310 and speed reducer 320
Function, structure is simple, and function is easy, and cost is relatively low, can guarantee the normal operation of blender.
Embodiment 2
As shown in figure 3, present embodiments provide a kind of wet method fume desulfurizing system, including absorption tower 600 and it is set to
The blender using composite ceramics reparation in the embodiment 1 of the lower part on absorption tower 600.Absorption tower 600 exists for realizing flue gas
Desulfurizing and purifying in absorption tower 600, purified flue gas enter chimney by absorption tower 600 and are discharged.Blender is located at slurry pool
Lower part can prevent solid particle from precipitating in slurry pool, it is ensured that slurries can be uniformly delivered to dewatering system, avoid absorbing
Slurries deposition causes equipment damage in tower 600, and the diffusion of oxidation air is reinforced, promote calcium sulfite oxidation and
The growth of gypsum crystal and the dissolution of lime stone.
Arrangement of the blender in 600 bottom of absorption tower can be there are many mode, and blender should be arranged in 600 bottom of absorption tower
Rationally, to give full play to the function of blender, avoid in absorption tower 600 slurries heavy, in a kind of specific embodiment, such as Fig. 4
Shown, circumferential direction of the blender along absorption tower 600 is evenly arranged with multiple, and each blender is enabled to stir same volume
Fluid avoids generating interference between flow field, also, between the axis and horizontal line of each blender using composite ceramics reparation
Angle be 10 °, i.e., blender is inclined relative to horizontal setting, and the axis of each blender using composite ceramics reparation exists
Angle between the projection of horizontal plane and the radial direction on absorption tower 600 is 4-12 °, i.e., the axis of blender is on locating absorption tower
Projection line in 600 planes and the angle at this between diameter line on absorption tower 600, if blender is mutual along absorption tower 600
Vertical diameter line installation, the slurries between blender and near 600 inner wall of absorption tower are just stirred less than, it may appear that precipitating knot
Dirt is likely to result in slurries and rotates around center if radial angle is excessive, generates precipitating in central area, is only stirring
For device after preferred arrangement, just can guarantee does not have the deposition of solid particle in container, guarantees the function and effect of blender.
In the optinal plan of the present embodiment, axial direction of the blender along absorption tower 600 be evenly arranged with it is multiple, on adjacent plane
It is uniformly staggered between the multiple blenders using composite ceramics reparation being arranged.Pass through the axial direction setting along absorption tower 600
Multilayer blender.Preferably, blender is arranged two layers, the effect of lower layer's blender be to prevent in absorption tower 600 slurries deposition,
Fouling or blocking allow the desulfuration byproduct through peroxidization is uniform, smoothly enters dewatering system to complete entirely
Oxidation spray gun is arranged in process flow, the top of upper mixer, from oxidation spray gun to 600 stock tank of absorption tower when desulphurization system is run
Oxidation air is blasted, the effect of upper mixer is to enhance the diffusion of oxidation air, promotes the oxidation of calcium sulfite, it is ensured that in office
When calcium sulfite of the time by neutralization reaction generation can be substantially oxidized into dihydrate gypsum.The desulfurization of double-layered stirrer is set
System, simple compared with the system of setting single layer blender in technical aspect since two layers of mixer function is relatively independent, operation aspect
System compared with setting single layer blender is relatively reliable.
Since there are foulants for 600 stock tank liquid level of absorption tower to slurries spraying layer, when the foulants such as crystal of calcium sulfate collapse,
Area is big, quality weight, and the impact force of generation is big, often will cause the things such as 400 damage of blender mechanically-sealing apparatus, bending shaft
Therefore cause desulphurization system can not normal operation, in a kind of specific embodiment, as shown in figure 5, being provided in absorption tower 600
Backplate 610, backplate 610 are set to the top of blender, and backplate 610 is cellular grid backplate 610, also, backplate 610 is to close
The direction of agitating paddle 100 is obliquely installed.Cellular grid backplate 610 has fragmentation, crystallizes hardness, the higher sulfuric acid of density
Calcium crystallization falls off crash into slurry pool after be still able to maintain higher kinetic energy, and cellular grid backplate 610 collapses what object contacted with crystallizing
The face Bian Kou, contact area is small, and when the two bumps against, crystallization crushing effect is good, and most crystal of calcium sulfate is broken broken
Piece is fallen into through cellular grid backplate 610 in the slurry pool of lower section, and is pushed by blender, is avoided nearby heaping, is influenced to stir
Mix device operation.Backplate 610 is obliquely installed, and the biggish crystal of calcium sulfate that can not be crushed can then slide to absorption tower 600 with inclined-plane
The slurry pool in center, protects blender not smashed.
To reduce the self weight of backplate 610, while guaranteeing the function of protection, in the optinal plan of the present embodiment, backplate 610
Shape is convex, and the backplate 610 positioned at 200 top of agitating shaft is greater than positioned at the width of the backplate 610 on 100 top of agitating paddle
Width under the premise of effective protection blender, reduces shield so that the structure of backplate 610 and the structure of blender be made to match
The area of plate 610, further saves cost.
Finally it should be noted that:The above various embodiments is only to illustrate the technical solution of the utility model, rather than limits it
System;Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should
Understand:It is still possible to modify the technical solutions described in the foregoing embodiments, or to some or all of
Technical characteristic is equivalently replaced;And these are modified or replaceed, it does not separate the essence of the corresponding technical solution, and this is practical new
The range of each embodiment technical solution of type.