CN102553827A

CN102553827A - Pulverized coal separator

Info

Publication number: CN102553827A
Application number: CN2012100169434A
Authority: CN
Inventors: 吴红艳
Original assignee: SHANGHAI JINGLI ENVIRONMENTAL PROTECTION CO Ltd
Current assignee: Weicheng (Tianjin) Technology Co.,Ltd.
Priority date: 2012-01-19
Filing date: 2012-01-19
Publication date: 2012-07-11
Anticipated expiration: 2032-01-19
Also published as: CN102553827B

Abstract

The invention discloses a pulverized coal separator which is characterized in that a shell is an oblique cone, an upper cover is arranged on the top of the shell, and a discharge hole is arranged at the bottom of the shell; the upper cover is provided with a feeding hole, an air outlet and a machine seat; a comb filter device consists of a rotating bracket and filter screen plates; the plurality of filter screen plates are arranged on the rotating bracket in an inclined way in a shape of a fan blade; a driving device is fixed on the machine seat; and a rotating shaft of the rotating bracket is connected with an output shaft of the driving device. Compared with the prior art, the pulverized coal separator is simple in structure, low in manufacturing cost, strong in screening capability, hard in blockage of a screen, and can be especially used for trapping short fiber and flocked fiber in pulverized coal, so that the separation efficiency is further improved, and the service life is further prolonged.

Description

Coal dust classifier

Technical field

The present invention relates to the solid separation equipment technical field, specifically a kind of coal dust classifier that is used for defibre.

Background technology

Coal dust classifier is one of most important equipment in thermal power plant's coal pulverizer pulverized coal preparation system, and coal dust is to be formed through pulverizing coal-grinding by lump coal year, because of in the coal often with the wood materials of permineralization not; Wood materials forms fiber different in size and is mixed in the coal dust during coal-grinding; The coal dust of sneaking into fiber directly influences result of use, particularly is the stove and accessory of fuel with the coal dust, because of the fiber at the jet hole place that flows through is sintered; In case be accumulated as the sticking stifled jet hole of piece, just cause expensive nozzle to be burnt out.Coal dust separation equipment commonly used generally all adopts lattice structure, can effectively sift out fiber, can improve the purity of coal dust, improves result of use.But the coal dust classifier of lattice structure can only sift out a spot of short fiber and velvet-like fiber, can not thoroughly solve jet hole and glued problem stifled and scaling loss.

At present, the isolation technics that adopts broach and screen cloth layering superposition is arranged also, broach is positioned at the upper strata of screen cloth; Be the radioactivity plane formula and arrange,, cause coming off and stopping up screen cloth of broach easily because broach is fixed on the groove for the formula of assigning; Influence the filtration of coal dust, reduce the separative efficiency of coal dust.

Summary of the invention

A kind of coal dust classifier that the objective of the invention is to be directed against the deficiency of prior art and design, its adopts the foliaceous comb filter structure of rotation, effectively captures the short fiber in the coal dust, velvet-like fiber and impurity; Screening capacity is strong, and screen cloth is difficult for blocked, has greatly improved the separative efficiency of coal dust; Under the constant situation of filter area; Can dwindle the volume of separator, reduce the use amount of steel, further reduce manufacturing expense.

The concrete technical scheme that realizes the object of the invention is: a kind of coal dust classifier, comprise housing, drive unit and comb filter device, be characterized in that housing is a beveled cone, its top is provided with loam cake, the bottom is provided with discharging opening, on cover and be provided with charging aperture, exhaust outlet and support; The comb filter device is made up of runing rest and sieve plate; Runing rest is to be provided with rotating shaft and several extension arms that are connected radially with rotating shaft; Hang and weld the inserted link that is provided with bending on the arm; Sieve plate is provided with the broach that matrix form is arranged, and its back side is provided with insertion pipe, and broach is that vertical setting and welding are fixing with sieve plate; Sieve plate is hung on the inserted link of arm and fastening by screw by the insertion pipe socket joint, and several pieces sieve plate are that fan is lobate to be obliquely installed on runing rest; Drive unit is fixed on the support, and the rotating shaft of runing rest is connected with the output shaft of drive unit.

Said housing is provided with steam pipe coil outward.

The bending of said inserted link is 120 ~ 145 ° of angles.

The present invention has the following advantages compared with prior art:

1, simple in structure, low cost of manufacture, sieve plate are obliquely installed and have increased filter area, can under the constant situation of mesh density, increase filtering accuracy, reach the more effect of fubril and impurity of effective capture;

2, under the constant situation of filter area, can dwindle the volume of separator, reduce the use amount of steel;

3, the sieve plate of rotation can guarantee that screen cloth is not blocked by short fiber and velvet-like fiber with velvet-like short fiber along with the wind-force drain separator that rises, and improves the separative efficiency and the service life of coal dust.

Description of drawings

Fig. 1 is a structural representation of the present invention;

Fig. 2 is the A-A view of Fig. 1;

Fig. 3 is the B-B view of Fig. 1;

Fig. 4 is the C-C view of Fig. 3;

Fig. 5 is that the D of Fig. 4 is to view.

The specific embodiment

Consult accompanying drawing 1, the present invention is made up of housing 1, drive unit 2 and comb filter device 3, and housing 1 is the tilted conical cylindrical shell, and its top is provided with loam cake 11, and the bottom is provided with discharging opening 12, the housing 1 outer steam pipe coil 13 that is provided with; Drive unit 2 is made up of motor 21 and decelerator 22, and decelerator 22 is fixedly installed on the support 16 of loam cake 11; Comb filter device 3 is made up of runing rest 31 and sieve plate 32, and several pieces sieve plate 32 are the lobate inclination of fan and are fixedly installed on the runing rest 31, and the rotating shaft of runing rest 31 is connected with the output shaft of drive unit 2.

Consult accompanying drawing 2, loam cake 11 is provided with charging aperture 14, exhaust outlet 15, support 16, access door 17 and visor 18.

Consult accompanying drawing 3; Comb filter device 3 is made up of runing rest 31 and sieve plate 32; Runing rest 31 is for being provided with rotating shaft and several extension arms 33 that are connected radially with rotating shaft; Sieve plate 32 is hung on the inserted link 34 of arm 33 and fastening by screw by insertion pipe 36 socket joints, and several pieces sieve plate 32 are obliquely installed on runing rest 31 so that fan is lobate, and the rotating shaft of runing rest 31 is connected with the output shaft of drive unit 2.

Consult accompanying drawing 4 ~ accompanying drawing 5; Hang and weld the inserted link 34 that is provided with bending on the arm 33; The bending of inserted link 34 is 135 ° of angle settings, and sieve plate 32 is provided with the broach 35 that matrix form is arranged, and broach 35 is uniformly distributed in whole filtering net; Broach 35 is that vertical setting and welding are fixing with sieve plate 32, and sieve plate 32 back sides are provided with insertion pipe 36.

The present invention is work like this: start drive unit 2; In housing 1, make rotating operation by motor 21 and decelerator 22 driven rotary supports 31, coal dust get into housings 1 by the charging aperture 14 of loam cake 11 and drop to rotation several pieces be on the sieve plate 32 of fan shape, the fiber in the coal dust is captured by broach intensive on the sieve plate 32 35; To reach the effect of defibre; The coal dust that captures behind the fiber drops on the screen cloth of sieve plate 32, and by discharging opening 12 discharges of housing 1 bottom, the impurity in the coal dust then rests on the screen cloth of sieve plate 32 coal dust through the back of sieving of sieve plate 32; Isolated fiber and impurity carry out periodic cleaning by access door 17; In housing 1, produce the wind-force that rises during sieve plate 32 rotations the velvet-like short fiber in the coal dust is discharged from the exhaust outlet 15 of loam cake 11, guarantee that screen cloth is not blocked by short fiber and velvet-like fiber, reaches the good result of high efficiency separation fiber; Improve screening capacity; The velvet-like short fiber gas that contains to discharging connects dust arrester processing back discharging, and steam pipe coil 13 can carry out heat drying to the coal dust in the housing 1 after connecting jet chimneys, can in time observe the fiber cleaning and the ruuning situation of combing filter device 3 through visor 18.

More than just the present invention being further described, is not in order to the restriction this patent, all for the present invention's equivalence enforcement, all should be contained within the claim scope of this patent.

Claims

1. a coal dust classifier comprises housing, drive unit and comb filter device, it is characterized in that housing is a beveled cone, and its top is provided with loam cake, and the bottom is provided with discharging opening, on cover and be provided with charging aperture, exhaust outlet and support; The comb filter device is made up of runing rest and sieve plate; Runing rest is to be provided with rotating shaft and several extension arms that are connected radially with rotating shaft; Hang and weld the inserted link that is provided with bending on the arm; Sieve plate is provided with the broach that matrix form is arranged, and its back side is provided with insertion pipe, and broach is that vertical setting and welding are fixing with sieve plate; Sieve plate is hung on the inserted link of arm and fastening by screw by the insertion pipe socket joint, and several pieces sieve plate are that fan is lobate to be obliquely installed on runing rest; Drive unit is fixed on the support, and the rotating shaft of runing rest is connected with the output shaft of drive unit.

2. according to the said coal dust classifier of claim 1, it is characterized in that said housing is provided with steam pipe coil outward.

3. according to the said coal dust classifier of claim 1, the bending that it is characterized in that said inserted link is 120 ~ 145 ° of angles.