CN203380103U - Coal dust dynamic separator with curved surface blades - Google Patents
Coal dust dynamic separator with curved surface blades Download PDFInfo
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- CN203380103U CN203380103U CN201320348626.2U CN201320348626U CN203380103U CN 203380103 U CN203380103 U CN 203380103U CN 201320348626 U CN201320348626 U CN 201320348626U CN 203380103 U CN203380103 U CN 203380103U
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Abstract
The utility model relates to a coal dust dynamic separator with curved surface blades. Blades of existing coal dust dynamic separators are of straight blade structures, generated air flow is weak, and blade abrasion caused by coal dust particles is large. The coal dust dynamic separator comprises a rotating shaft disc, a circular ring and a plurality of blades, and the blades are fixed on the rotating shaft disc and the circular ring. The coal dust dynamic separator is structurally characterized in that the blades are of curved surface structures and are provided with concave surfaces and convex surfaces, the concave surfaces of the blades are arc-shaped, the convex surfaces of the blades are semielliptical, two endpoints of every arc and two endpoints of every semiellipse coincide respectively, the connection line of the two endpoints of every semiellipse is a long axis of an ellipse, the length of the long axis of the ellipse is equal to the chord length of every arc, the length of a short axis of the ellipse is 6/10 the radius of every arc, and the concave surfaces of the plurality of blades are arranged in the clockwise direction or the anti-clockwise direction. The coal dust dynamic separator is reasonable in structural design, generated rotational flow is strong, and blade abrasion caused by the coal dust particles is reduced.
Description
Technical field
The utility model relates to a kind of coal dust dynamic separator, especially relates to a kind of coal dust dynamic separator that adopts curved surface bucket, can be applied on the dynamic separator that need to carry out in industrial department that gas-solid two is separated.
Background technology
In production process at all with the gas-solid two-phase, gas solid separation is an indispensable link, in the industries such as electric power, chemical industry, oil, coal, metallurgy, chemical fertilizer, cement, weaving, food, light industry and environmental engineering, has a wide range of applications.The operation principle of the gas-solid separating device of general application has: Gravity Separation mechanism, inertial separation mechanism, centrifugation mechanism and charged separating mechanism.The static state of separating for power industry coal pulverizer thickness powder and dynamic separator are all to utilize inertial separation mechanism by the thickness powder separately, and meal enters coal pulverizer and again grinds, and fine powder participates in burning along with the climbing power effect of a wind enters burner hearth.In recent years, the engineering project of using dynamic separator to replace original static separation device constantly starts in power plant, when obtaining preferably operational effect, operations staff and the researcher of Electric Power Section institute find that dynamic separator easily produces blade wear, the problems such as rotating mechanism obstruction.Meanwhile, for the stepping up of NOx emission control, more and more higher with the requirement that reduces the NOx discharge for using higher fineness coal dust due to country.
The coal dust dynamic separator that some other structures are also arranged at present, as open day is on 09 06th, 2000, in the Chinese patent that publication number is CN2394729, a kind of dynamic middlings separator is disclosed, this mill separator is one of capital equipment of thermal power plant the ball type pulverizer system, qualified coal dust can be separated from air-flow, but be difficult to effectively improve fineness of pulverized coal, be difficult to effectively reduce the wearing and tearing to blade.And for example open day is on 04 25th, 2012, in the Chinese patent that publication number is CN202199508U, a kind of quiet movable vane mating type rotating classifier is disclosed, it comprises shell separator this quiet movable vane mating type rotating classifier, and housing is provided with flour extraction pipe, powder inlet pipe and the powder retrieving pipe communicated with enclosure interior; Be provided with inner barrel in housing, the upper end open of inner barrel, lower end communicates with powder retrieving pipe; Be provided with a plurality of stator blades by circumferential arrangement between inner barrel upper end and shell separator; Drive motors is installed on housing, and machine shaft vertically enters through separator upper end housing the circumference inside that separator is interior, stator blade surrounds; Movable vane wheel rotor connects machine shaft, on movable vane wheel rotor, by circumferential arrangement, a plurality of moving vanes is installed; Under machine shaft drives, movable vane wheel rotor drives moving vane and rotates formation dynamic rotary Disengagement zone, and the complex structure of this quiet movable vane mating type rotating classifier, be difficult to effectively improve fineness of pulverized coal, is difficult to effectively reduce the wearing and tearing to blade.
Blade in existing coal dust dynamic separator is generally the prismatic blade structure, the air-flow of generation a little less than, the runner surrounded can not make air-flow wherein of circulation form certain rotation, is difficult to further filter large pulverized coal particle, pulverized coal particle is larger to the wearing and tearing of blade.
The utility model content
The purpose of this utility model is to overcome above shortcomings in prior art, and provide a kind of reasonable in design, the vortex gas-flow produced is stronger, the runner surrounded can make circulation air-flow wherein form certain rotation, can further filter large pulverized coal particle, improve fineness of pulverized coal, reduce the coal dust dynamic separator of pulverized coal particle to the employing curved surface bucket of blade wear.
The technical scheme in the invention for solving the above technical problem is: the coal dust dynamic separator of this employing curved surface bucket comprises the rotating shaft disk, annulus and several pieces blades, blade is fixed on rotating shaft disk and annulus, its design feature is: described blade is curved-surface structure, be provided with concave surface and convex surface in this blade, concave surface in described blade is circular arc, convex surface in this blade is half elliptic, two end points in circular arc respectively with half elliptic in two end points overlap, line between two end points in half elliptic is oval major axis, the chord length that the length of the major axis of described ellipse is circular arc, 6/10 of the radius that the minor axis length of described ellipse is circular arc, concave surface in described several pieces blades is towards arranging along clockwise or counter clockwise direction.Make thus the utility model can effectively improve fineness of pulverized coal, reduce the wearing and tearing of pulverized coal particle to blade, the vortex gas-flow of generation is stronger, and the runner surrounded can make circulation air-flow wherein form certain rotation, can further filter large pulverized coal particle.
As preferably, coal dust dynamic separator described in the utility model is the rotating plane-like structure.
As preferably, coal dust dynamic separator described in the utility model is the circular cone type structure.
As preferably, coal dust dynamic separator described in the utility model is cylindrical structural.
As preferably, the radius of rotating shaft disk described in the utility model is less than the radius of annulus, and this rotating shaft disk is positioned at annulus, one end of described blade is fixed on the rotating shaft disk, the other end of this blade is fixed on annulus, thereby forms rotor, and epitrochanterian blade is structure radially; Described rotor is disk-like structure, and the radius of the circular arc in described blade is rotor diameter 1/10, and the angle of circular arc is 90 degree, and the distance between adjacent two blades is 30～40cm.During use, coal dust is by the bottom, plane because the effect rising of swirling eddy is passed through, and rotating shaft is connected rotary power is provided with the rotating shaft disk by the rotating shaft disc centre.
As preferably, the radius of rotating shaft disk described in the utility model is less than the radius of annulus, and this rotating shaft disk is positioned at the below of annulus, the lower end of described blade is fixed on the rotating shaft disk, the top of this blade is fixed on the surrounding of annulus, thereby forms rotor, and epitrochanterian blade is ramp-like configuration; Described rotor is the truncated cone-shaped structure, 1/12 of the mean value that the radius of the circular arc of described blade is round platform upper bottom surface radius and round platform bottom surface radius sum, and the angle of circular arc is 80 degree.Rotor shapes is truncated cone-shaped, and coal dust flows into the round platform middle part by surrounding, and curved surface bucket is trapped among the round platform surrounding.
As preferably, the radius of rotating shaft disk described in the utility model is more than or equal to the radius of annulus, this rotating shaft disk is positioned at the below of annulus, the lower end of described blade is fixed on the rotating shaft disk, the top of this blade is fixed on the surrounding of annulus, thereby the formation rotor, epitrochanterian blade is vertical shape structure; Described rotor is cylindrical structural, and the radius of the circular arc of described blade is cylindrical radius 1/11, and the angle of circular arc is 80 degree.Rotor shapes is cylinder, and curved surface bucket is arranged on the cylinder surrounding.
The utility model compared with prior art, have the following advantages and effect: simple in structure, reasonable in design, the vortex gas-flow produced is stronger, the runner surrounded can make circulation air-flow wherein form certain rotation, can further filter large pulverized coal particle, improve fineness of pulverized coal, reduce pulverized coal particle to blade wear.
The structure of the utility model Leaf is circular-arc, according to being used in dissimilar dynamic separator, and different blade quantities, blade has different curved-surface structures.As everyone knows, the separation principle of dynamic separator is: band powder air-flow drives backspin at rotor and turns, and particle is mainly carried the traction of air-flow in the rotating separation district, this active force and air-flow axial velocity Vr
2and particle diameter d
p 2be directly proportional; Simultaneously during flow rotation, particle is subject to centrifugal action, the centrifugal force be subject to and the tangential velocity V of particle
t 2be directly proportional, with particle diameter d
p 3be directly proportional, be directly proportional to the particle real density.When the centrifugal force be subject to when particle is greater than the traction of air-flow, particle will be separated, therefore particle diameter is larger, the relative traction of suffered centrifugal force is larger, particle is out more easily separated, so the pulverized coal particle that particle diameter is larger will be separated, and the less fine breeze of particle diameter will carry out combustion reaction along with air-flow is transported to burner hearth.
Blade exchanging in the utility model can strengthen the above-mentioned separation mechanism of conventional dynamic separator after to existing dynamic separator, this is because the utility model is compared with prismatic blade, curved surface bucket in the utility model has larger area, so produced stronger vortex gas-flow; Than prismatic blade, the runner surrounded by curved surface can make circulation air-flow wherein form certain rotation simultaneously, so can further filter large pulverized coal particle; This curved surface is leaf also is conducive to reduce the wearing and tearing of pulverized coal particle to blade; By to blade and coal dust, coming the change of the flow path direction angle of attack can effectively adjust the fineness of screening coal dust, this regulating action is more effective than straight-vaned adjustment.
The accompanying drawing explanation
Fig. 1 adopts the structural representation of the coal dust dynamic separator of curved surface bucket in the utility model embodiment 1.
Fig. 2 adopts the structural representation of the coal dust dynamic separator of curved surface bucket in the utility model embodiment 2.
Fig. 3 adopts the structural representation of the coal dust dynamic separator of curved surface bucket in the utility model embodiment 3.
Fig. 4 is the perspective view of the utility model embodiment Leaf.
Fig. 5 is the sectional structure schematic diagram of the utility model embodiment Leaf.
Fig. 6 is the direction of rotation of the utility model embodiment Leaf and the structural representation between the mixed coal powder inflow direction, wherein, and the direction of rotation that direction y is blade, the inflow direction that direction m is mixed coal powder.
The specific embodiment
Below in conjunction with accompanying drawing and by embodiment, the utility model is described in further detail, and following examples are to explanation of the present utility model and the utility model is not limited to following examples.
Referring to Fig. 1, Fig. 4 to Fig. 6, adopt the coal dust dynamic separator of curved surface bucket to comprise rotating shaft disk 1, annulus 2 and several pieces blades 3 in the present embodiment, and the coal dust dynamic separator is the rotating plane-like structure.
The radius of the rotating shaft disk 1 in the present embodiment is less than the radius of annulus 2, this rotating shaft disk 1 is positioned at annulus 2, one end of blade 3 is fixed on rotating shaft disk 1, the other end of this blade 3 is fixed on annulus 2, thereby formation rotor, epitrochanterian blade 3 is structure radially, and the concave surface 31 in several pieces blades 3 is towards arranging along clockwise or counter clockwise direction.Blade 3 is fixed on rotating shaft disk 1 and annulus 2.
Rotor in the present embodiment is disk-like structure, and the radius of the circular arc in blade 3 is rotor diameter 1/10, and the angle of circular arc is 90 degree, and the distance between adjacent two blades 3 is 30～40cm.
In the coal pulverizer of the coal dust dynamic separator in is used the present embodiment, upwards mobile under a wind action by the thickness mixed coal powder of coal pulverizer milled, after running into the swirling eddy caused by Plane of rotation, mixed coal powder starts rotation.Because the area of the blade 3 of curved-surface structure is large than prismatic blade, thereby the more powerful swirling eddy of generation, thereby force coal dust with higher tangential velocity rotation, receive the effect of larger centrifugal force simultaneously than fine breeze due to the rough coal powder, thereby the rough coal pruinescence throws away the mixed coal powder air-flow, thereby the rough coal powder has been carried out separating for the first time.When the mixed coal powder air-flow arrives Plane of rotation and is going forward side by side into runner, because being shaped as of runner is circular-arc, thereby breeze airflow carried out secondary rotation, under same centrifugal action principle, thicker coal dust is separated for the second time, only has fine breeze can enter burner hearth and participates in burning.
Because the swirling eddy of the blade 3 of curved-surface structure is more powerful, and in separation process than the more than once rotating separation of prismatic blade, thereby can improve thinner coal dust for boiler combustion, this discharge that improves integral energy service efficiency and control NOx for power station is all extremely significant.
In the coal dust dynamic separator of the blade 3 of the curved-surface structure in being provided with the present embodiment, blade 3 be characterized as the plane blade on dynamic separator different from the past, the blade 3 of this curved-surface structure can have curved-surface structure specific and that different size specification dynamic separator adapts.This blade 3 also can occur with different quantity and setting angle on different whirligigs.
Referring to Fig. 2, Fig. 4 to Fig. 6, the coal dust dynamic separator of the employing curved surface bucket in the present embodiment comprises rotating shaft disk 1, annulus 2 and several pieces blades 3, this coal dust dynamic separator is the circular cone type structure.
The radius of the rotating shaft disk 1 in the present embodiment is less than the radius of annulus 2, this rotating shaft disk 1 is positioned at the below of annulus 2, the lower end of blade 3 is fixed on rotating shaft disk 1, the top of this blade 3 is fixed on the surrounding of annulus 2, thereby formation rotor, epitrochanterian blade 3 is ramp-like configuration, and the concave surface 31 in several pieces blades 3 is towards arranging along clockwise or counter clockwise direction.Blade 3 is fixed on rotating shaft disk 1 and annulus 2.
Rotor in the present embodiment is the truncated cone-shaped structure, 1/12 of the mean value that the radius of the circular arc of blade 3 is round platform upper bottom surface radius and round platform bottom surface radius sum, and the angle of circular arc is 80 degree.
Referring to Fig. 3 to Fig. 6, the coal dust dynamic separator of the employing curved surface bucket in the present embodiment comprises rotating shaft disk 1, annulus 2 and several pieces blades 3, and this coal dust dynamic separator is cylindrical structural.
The radius of the rotating shaft disk 1 in the present embodiment is more than or equal to the radius of annulus 2, this rotating shaft disk 1 is positioned at the below of annulus 2, the lower end of blade 3 is fixed on rotating shaft disk 1, the top of this blade 3 is fixed on the surrounding of annulus 2, thereby formation rotor, epitrochanterian blade 3 is vertical shape structure, and the concave surface 31 in several pieces blades 3 is towards arranging along clockwise or counter clockwise direction.Blade 3 is fixed on rotating shaft disk 1 and annulus 2.
Rotor in the present embodiment is cylindrical structural, and the radius of the circular arc of blade 3 is cylindrical radius 1/11, and the angle of circular arc is 80 degree.
In addition, it should be noted that, the specific embodiment described in this specification, the shape of its parts and components, institute's title of being named etc. can be different, and the above content described in this specification is only to the explanation of the utility model structure example.Allly according to the utility model patent, conceive equivalence variation or the simple change that described structure, feature and principle are done, be included in the protection domain of the utility model patent.The utility model person of ordinary skill in the field can make various modifications or supplements or adopt similar mode to substitute described specific embodiment; only otherwise depart from structure of the present utility model or surmount this scope as defined in the claims, all should belong to protection domain of the present utility model.
Claims (7)
1. a coal dust dynamic separator that adopts curved surface bucket, comprise the rotating shaft disk, annulus and several pieces blades, blade is fixed on rotating shaft disk and annulus, it is characterized in that: described blade is curved-surface structure, be provided with concave surface and convex surface in this blade, concave surface in described blade is circular arc, convex surface in this blade is half elliptic, two end points in circular arc respectively with half elliptic in two end points overlap, line between two end points in half elliptic is oval major axis, the chord length that the length of the major axis of described ellipse is circular arc, 6/10 of the radius that the minor axis length of described ellipse is circular arc, concave surface in described several pieces blades is towards arranging along clockwise or counter clockwise direction.
2. the coal dust dynamic separator of employing curved surface bucket according to claim 1, it is characterized in that: described coal dust dynamic separator is the rotating plane-like structure.
3. the coal dust dynamic separator of employing curved surface bucket according to claim 1, it is characterized in that: described coal dust dynamic separator is the circular cone type structure.
4. the coal dust dynamic separator of employing curved surface bucket according to claim 1, it is characterized in that: described coal dust dynamic separator is cylindrical structural.
5. the coal dust dynamic separator of employing curved surface bucket according to claim 2, it is characterized in that: the radius of described rotating shaft disk is less than the radius of annulus, this rotating shaft disk is positioned at annulus, one end of described blade is fixed on the rotating shaft disk, the other end of this blade is fixed on annulus, thereby the formation rotor, epitrochanterian blade is structure radially; Described rotor is disk-like structure, and the radius of the circular arc in described blade is rotor diameter 1/10, and the angle of circular arc is 90 degree, and the distance between adjacent two blades is 30～40cm.
6. the coal dust dynamic separator of employing curved surface bucket according to claim 3, it is characterized in that: the radius of described rotating shaft disk is less than the radius of annulus, this rotating shaft disk is positioned at the below of annulus, the lower end of described blade is fixed on the rotating shaft disk, the top of this blade is fixed on the surrounding of annulus, thereby the formation rotor, epitrochanterian blade is ramp-like configuration; Described rotor is the truncated cone-shaped structure, 1/12 of the mean value that the radius of the circular arc of described blade is round platform upper bottom surface radius and round platform bottom surface radius sum, and the angle of circular arc is 80 degree.
7. the coal dust dynamic separator of employing curved surface bucket according to claim 4, it is characterized in that: the radius of described rotating shaft disk is more than or equal to the radius of annulus, this rotating shaft disk is positioned at the below of annulus, the lower end of described blade is fixed on the rotating shaft disk, the top of this blade is fixed on the surrounding of annulus, thereby the formation rotor, epitrochanterian blade is vertical shape structure; Described rotor is cylindrical structural, and the radius of the circular arc of described blade is cylindrical radius 1/11, and the angle of circular arc is 80 degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320348626.2U CN203380103U (en) | 2013-06-18 | 2013-06-18 | Coal dust dynamic separator with curved surface blades |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320348626.2U CN203380103U (en) | 2013-06-18 | 2013-06-18 | Coal dust dynamic separator with curved surface blades |
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| Publication Number | Publication Date |
|---|---|
| CN203380103U true CN203380103U (en) | 2014-01-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320348626.2U Expired - Lifetime CN203380103U (en) | 2013-06-18 | 2013-06-18 | Coal dust dynamic separator with curved surface blades |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103302031A (en) * | 2013-06-18 | 2013-09-18 | 华电电力科学研究院 | Dynamic pulverized coal separator adopting curved blades |
| CN110788005A (en) * | 2019-11-06 | 2020-02-14 | 中国矿业大学 | Centrifugal air classifier for superfine powder |
-
2013
- 2013-06-18 CN CN201320348626.2U patent/CN203380103U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103302031A (en) * | 2013-06-18 | 2013-09-18 | 华电电力科学研究院 | Dynamic pulverized coal separator adopting curved blades |
| CN110788005A (en) * | 2019-11-06 | 2020-02-14 | 中国矿业大学 | Centrifugal air classifier for superfine powder |
| CN110788005B (en) * | 2019-11-06 | 2021-01-15 | 中国矿业大学 | Centrifugal air classifier for superfine powder |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140108 |