CN105750202A - Suction type gas flow screen and screening method thereof - Google Patents

Suction type gas flow screen and screening method thereof Download PDF

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Publication number
CN105750202A
CN105750202A CN201610127335.9A CN201610127335A CN105750202A CN 105750202 A CN105750202 A CN 105750202A CN 201610127335 A CN201610127335 A CN 201610127335A CN 105750202 A CN105750202 A CN 105750202A
Authority
CN
China
Prior art keywords
screen
dust
suction
screen box
pipeline
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201610127335.9A
Other languages
Chinese (zh)
Inventor
周恩勇
周红军
郝喆
余月华
徐志刚
郑大局
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shanghai Lanzhi Environment Protection Technology Co Ltd
Original Assignee
Shanghai Lanzhi Environment Protection Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Shanghai Lanzhi Environment Protection Technology Co Ltd filed Critical Shanghai Lanzhi Environment Protection Technology Co Ltd
Priority to CN201610127335.9A priority Critical patent/CN105750202A/en
Publication of CN105750202A publication Critical patent/CN105750202A/en
Pending legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B07SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07BSEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/28Moving screens not otherwise provided for, e.g. swinging, reciprocating, rocking, tilting or wobbling screens
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B07SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07BSEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/46Constructional details of screens in general; Cleaning or heating of screens
    • B07B1/4609Constructional details of screens in general; Cleaning or heating of screens constructional details of screening surfaces or meshes
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B07SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07BSEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B1/00Sieving, screening, sifting, or sorting solid materials using networks, gratings, grids, or the like
    • B07B1/46Constructional details of screens in general; Cleaning or heating of screens
    • B07B1/4609Constructional details of screens in general; Cleaning or heating of screens constructional details of screening surfaces or meshes
    • B07B1/4663Multi-layer screening surfaces
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B07SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07BSEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B4/00Separating solids from solids by subjecting their mixture to gas currents
    • B07B4/02Separating solids from solids by subjecting their mixture to gas currents while the mixtures fall
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B07SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07BSEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B9/00Combinations of apparatus for screening or sifting or for separating solids from solids using gas currents; General arrangement of plant, e.g. flow sheets
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B08CLEANING
    • B08BCLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B15/00Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area
    • B08B15/04Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area from a small area, e.g. a tool
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B07SEPARATING SOLIDS FROM SOLIDS; SORTING
    • B07BSEPARATING SOLIDS FROM SOLIDS BY SIEVING, SCREENING, SIFTING OR BY USING GAS CURRENTS; SEPARATING BY OTHER DRY METHODS APPLICABLE TO BULK MATERIAL, e.g. LOOSE ARTICLES FIT TO BE HANDLED LIKE BULK MATERIAL
    • B07B2201/00Details applicable to machines for screening using sieves or gratings
    • B07B2201/04Multiple deck screening devices comprising one or more superimposed screens

Abstract

The invention discloses a suction type gas flow screen and a screening method thereof, relates to the technical field of material screening and is aimed at achieving the purpose of improving the screening efficacy and size fraction quality. The gas flow screen comprises a bottom table, a centrifugal fan, a screen box mounted on the bottom table, a vibration device for driving the screen box to vibrate and at least one layer of screen net mounted in the screen box. The gas flow is characterized in that a feed hole is formed in the upper end of the screen box, and a suction gas flow pipeline is arranged at the feed hole of the screen body; a gas inlet of the suction gas flow pipeline faces the feed hole of the screen box; a gas outlet of the suction gas flow pipeline is connected with a gas inlet of the centrifugal fan through an electric adjustable wind door; a dust absorption pipeline for absorbing the leaking dust at the bottom of the screen box is arranged at the bottom of the screen box; and the dust absorption pipeline is communicated with the suction gas flow pipeline. The gas flow screen and the screening method thereof disclosed by the invention bring slight influence to the surroundings.

Description

Sucking type airflow screen and method for sieving thereof
Technical field
The present invention relates to material screening technical field, particularly relate to sucking type airflow screen and the method for sieving thereof of a kind of efficiently big ability.
Background technology
Vibrosieve is to utilize produced by oscillator exciting the vibration of reciprocating rotary type to work, it is achieved to granule, the screening of powder material and classification, be widely used in the fields such as building materials, metallurgy, mine, colliery.Existing vibrosieve is generally made up of vibrator, screen box, supporting or the part such as suspension arrangement, actuating device, and essentially unenclosed construction, operating noise is big, dust is heavier;Separate unit vibrating screen classifier can be assigned to 4 layers of screen cloth, can go out 2-5 grade by continuous sorting, and screening production capacity is less than 400t/h.Along with technological progress, and the pay attention to day by day that people are to environmental protection, existing vibrosieve can not meet demand well, can also realize the new product of bigger sieving capacity in the urgent need to a kind of both environment-friendly high-efficiencies.Find through research and experiment, although existing Colophonium sieve also can sieve the material of 6 grades, but the most great talent 300t/h of production capacity, iff passing through increasing screen cloth face, overall dimensions, and the mode of oscillation power increases production capacity, it is very huge that the problem brought is not only overall dimensions, and screen life-span sharply declines, and the reliability of equipment can not be guaranteed.It addition, often have dust leakage bottom the screen box of vibrosieve, thus surrounding enviroment are impacted, it is necessary to human at periodic intervals clears up.
Summary of the invention
For drawbacks described above, the present invention provides one that screening usefulness and grade quality can be greatly improved, and surrounding enviroment affect little sucking type airflow screen and method for sieving thereof.
For achieving the above object, the technical scheme is that a kind of sucking type airflow screen, including base frame, centrifugal blower, and it is separately mounted to the screen box on base frame, for the vibrating device driving screen box to vibrate, and it is arranged at least one of which screen cloth in screen box, it is characterized in that: the upper end of described screen box offers charging aperture, and it is provided with suction airstream pipeline at the charging aperture place of screen box, the air inlet of suction airstream pipeline is towards the charging aperture of screen box, the air inlet of centrifugal blower is received by an electronic adjustable ventilation door in the gas outlet of suction airstream pipeline, the bottom of screen box is provided with the dust sucting pipeline for drawing screen box bottom leakage dust, described dust sucting pipeline and suction airstream pipeline are interconnected.
Further, the bottom surface of described dust sucting pipeline is curved, and offers the dust suction air port being made up of multiple air suction openings in the bottom surface of dust sucting pipeline, and is provided with the dust suction shrouding for regulating dust suction air port aperture in the bottom surface of dust sucting pipeline.
Further, five layers of screen cloth that laying and sieve aperture reduce successively successively from top to bottom are installed in described screen box.
Further, it is provided with integral type dust cover outside described screen box.
Further, described vibrating device includes the vibrating motor being fixed on dust cover, is fixed on the vibrator on screen box, and described vibrating motor is connected by belt with vibrator.
Further, being provided with cutting plate in described screen box, described cutting plate is laid in the underface of charging aperture, and cutting plate is a flat board, and the upper face of cutting plate is fixed with multiple baffle plates that uniform intervals is laid.
Further, the exit side of described screen box is provided with the guide case of translatable separation.
The method for sieving of sucking type airflow screen provided by the present invention, it is characterised in that specifically comprise the following steps that
The first step, calculates granule suspension gas speed according to the density of pellet to be sieved, mean diameter, and specific formula for calculation is:
Wherein,It is fast for granule suspension gas,For acceleration of gravity,For the mean diameter of pellet to be sieved,For the density of pellet to be sieved,For atmospheric density;
Second step, utilize the gas in centrifugal blower suction suction airstream pipeline and dust sucting pipeline, suction airstream conduit air inlet and dust sucting pipeline dust suction air port is made to produce suction airstream, and the air-flow velocity of suction airstream conduit air inlet and the air-flow velocity in dust sucting pipeline dust suction air port is regulated respectively by electronic adjustable ventilation door and dust suction shrouding, the air-flow velocity making suction airstream conduit air inlet keeps consistent with the granule suspension gas speed calculated, and screen box bottom leakage dust can be sucked dust sucting pipeline by the air-flow in dust sucting pipeline dust suction air port.
Sucking type airflow screen provided by the invention and method for sieving thereof, the air-flow produced by suction airstream pipeline is stirred and jointly coordinates with the vibration of screen box, the tiny dust of part or granule (less than 0.025mm particle diameter) is made to be directly separating in nearly feeding mouth section, thus the screening usefulness of equipment is greatly improved, maximum can arrive 600t/h, the quality of each grade after simultaneously also improving screening, can by dust content in material about 5%, it is achieved powder containing quantity controls;And when material is sieved, it is also with dust sucting pipeline and siphons away the leakage dust bottom screen box, the impact on surrounding enviroment can be reduced, and below charging aperture, adopt the cutting plate of cellular-type, it is achieved that the uniformity of charging, be favorably improved screening usefulness;And adopt separable guide case, easy to maintenance, there is hommization;And adopting Integral dust cover, decrease dust emission during production, environmental benefit is notable.
Accompanying drawing explanation
Fig. 1 is the front view of the sucking type airflow screen of the embodiment of the present invention;
Fig. 2 is the top view of the sucking type airflow screen of the embodiment of the present invention;
Fig. 3 is the left view of the sucking type airflow screen of the embodiment of the present invention;
Fig. 4 is the structure upward view of the dust sucting pipeline in the sucking type airflow screen of the embodiment of the present invention;
Fig. 5 is the sectional view after the line A-A cutting along Fig. 4 of the dust sucting pipeline in the sucking type airflow screen of the embodiment of the present invention;
Fig. 6 is the sectional view after the line B-B cutting along Fig. 4 of the dust sucting pipeline in the sucking type airflow screen of the embodiment of the present invention;
Fig. 7 is the sectional view of the cutting plate in the sucking type airflow screen of the embodiment of the present invention;
Fig. 8 is the top view of the cutting plate in the sucking type airflow screen of the embodiment of the present invention;
Fig. 9 is the service mode schematic diagram of the sucking type airflow screen of the embodiment of the present invention.
Detailed description of the invention
Illustrate embodiments of the invention are described in further detail below in conjunction with accompanying drawing; but the present embodiment is not limited to the present invention; the analog structure of every employing present invention and similar change thereof, all should list protection scope of the present invention in, and the pause mark in the present invention all represents the relation of sum.
As shown in Figure 1-Figure 3, a kind of sucking type airflow screen that the embodiment of the present invention provides, including base frame 10, centrifugal blower (not shown), and it is arranged on the screen box 1 on base frame 10 by a support arrangement 5, for the vibrating device 3 driving screen box 1 to vibrate, and it is arranged at least one of which screen cloth 2 in screen box 1, it is characterized in that: the upper end of described screen box 1 offers charging aperture 6, and it is provided with suction airstream pipeline 7 at charging aperture 6 place of screen box, the air inlet of suction airstream pipeline 7 is towards the charging aperture 6 of screen box, the air inlet of centrifugal blower is received by an electronic adjustable ventilation door 13 in the gas outlet of suction airstream pipeline 7, the bottom of screen box 1 is provided with the dust sucting pipeline 8 for drawing screen box bottom leakage dust, described dust sucting pipeline 8 is interconnected with suction airstream pipeline 7.
In the embodiment of the present invention, five layers of screen cloth 2 that laying and sieve aperture reduce successively successively from top to bottom are installed in described screen box 1.
In the embodiment of the present invention, integral type dust cover 4 it is provided with outside described screen box, described vibrating device includes the vibrating motor being fixed on dust cover 4, it is fixed on the vibrator on screen box 1, described vibrating motor and vibrator are connected by belt and realize transmission, are driven screen cloth 2 to carry out vibrosieve by screen box 1 during work;
In the embodiment of the present invention, the exit side of described screen box 1 is provided with the guide case 11 of translatable separation, guide case 11 is guided to corresponding discharge point for each specification pellet sieving out by screen box, and base frame 10 is provided with track, and guide case 11 is arranged on the track of base frame 10 by roller, when airflow screen needs to carry out internal maintenance and maintenance, being moved along guide rail by guide case 11, so as to separate with screen box (as shown in Figure 9), maintainer can enter from casing end, convenient for maintaining, has hommization.
As shown in Figure 7, Figure 8, in the embodiment of the present invention, being provided with cutting plate 12 in described screen box, described cutting plate 12 is laid in the underface of charging aperture, and cutting plate 12 is a flat board, the upper face of cutting plate 12 is fixed with multiple baffle plates 15 that uniform intervals is laid, cutting plate can form backing strap on the one hand, it is to avoid material is directly impinging on screen cloth, improves the service life of screen cloth, on the other hand uniform baffle plate can make the material can as homogeneously as possible to compass screen surface feeding, it is to avoid material is concentrated and affected screening efficiency.
As Figure 4-Figure 6, in the embodiment of the present invention, the bottom surface of described dust sucting pipeline 8 is curved, and offers the dust suction air port being made up of multiple air suction openings in the bottom surface of dust sucting pipeline 8, and is provided with the dust suction shrouding 14 for regulating dust suction air port aperture in the bottom surface of dust sucting pipeline.
The method for sieving of the sucking type airflow screen of the embodiment of the present invention, it is characterised in that specifically comprise the following steps that
The first step, calculates granule suspension gas speed according to the density of pellet to be sieved, mean diameter;
Theoretical according to particles settling, have:
For the quasi-number of Archimedes, Re is Reynolds number, and when Re is within the scope of pressure drag district (500 < Re < 2x105), granule suspension gas speed formula is:
Wherein,It is fast for granule suspension gas,For acceleration of gravity,For the mean diameter of pellet to be sieved,For the density of pellet to be sieved,For atmospheric density;
Second step, utilize the gas in centrifugal blower suction suction airstream pipeline and dust sucting pipeline, suction airstream conduit air inlet and dust sucting pipeline dust suction air port is made to produce suction airstream, and the air-flow velocity of suction airstream conduit air inlet and the air-flow velocity in dust sucting pipeline dust suction air port is regulated respectively by electronic adjustable ventilation door and dust suction shrouding, the air-flow velocity making suction airstream conduit air inlet keeps consistent with the granule suspension gas speed calculated, and screen box bottom leakage dust can be sucked dust sucting pipeline by the air-flow in dust sucting pipeline dust suction air port;
The suction airstream of suction airstream conduit air inlet can stir the fine granular materials in screen box, makes fine granular materials produce to suspend, by coordinating of suction airstream and vibration, it is possible to improves material screening efficiency, removal dust.

Claims (8)

1. a sucking type airflow screen, including base frame, centrifugal blower, and it is separately mounted to the screen box on base frame, for the vibrating device driving screen box to vibrate, and it is arranged at least one of which screen cloth in screen box, it is characterized in that: the upper end of described screen box offers charging aperture, and it is provided with suction airstream pipeline at the charging aperture place of screen box, the air inlet of suction airstream pipeline is towards the charging aperture of screen box, the air inlet of centrifugal blower is received by an electronic adjustable ventilation door in the gas outlet of suction airstream pipeline, the bottom of screen box is provided with the dust sucting pipeline for drawing screen box bottom leakage dust, described dust sucting pipeline and suction airstream pipeline are interconnected.
2. sucking type airflow screen according to claim 1, it is characterized in that: the bottom surface of described dust sucting pipeline is curved, and offer the dust suction air port being made up of multiple air suction openings in the bottom surface of dust sucting pipeline, and be provided with the dust suction shrouding for regulating dust suction air port aperture in the bottom surface of dust sucting pipeline.
3. sucking type airflow screen according to claim 1, it is characterised in that: five layers of screen cloth that laying and sieve aperture reduce successively successively from top to bottom are installed in described screen box.
4. sucking type airflow screen according to claim 1, it is characterised in that: it is provided with integral type dust cover outside described screen box.
5. sucking type airflow screen according to claim 4, it is characterised in that: described vibrating device includes the vibrating motor being fixed on dust cover, is fixed on the vibrator on screen box, and described vibrating motor is connected by belt with vibrator.
6. sucking type airflow screen according to claim 1, it is characterised in that: being provided with cutting plate in described screen box, described cutting plate is laid in the underface of charging aperture, and cutting plate is a flat board, and the upper face of cutting plate is fixed with multiple baffle plates that uniform intervals is laid.
7. sucking type airflow screen according to claim 1, it is characterised in that: the exit side of described screen box is provided with the guide case of translatable separation.
8. the method for sieving of sucking type airflow screen according to claim 2, it is characterised in that specifically comprise the following steps that
The first step, calculates granule suspension gas speed according to the density of pellet to be sieved, mean diameter, and specific formula for calculation is:
Wherein,It is fast for granule suspension gas,For acceleration of gravity,For the mean diameter of pellet to be sieved,For the density of pellet to be sieved,For atmospheric density;
Second step, utilize the gas in centrifugal blower suction suction airstream pipeline and dust sucting pipeline, suction airstream conduit air inlet and dust sucting pipeline dust suction air port is made to produce suction airstream, and the air-flow velocity of suction airstream conduit air inlet and the air-flow velocity in dust sucting pipeline dust suction air port is regulated respectively by electronic adjustable ventilation door and dust suction shrouding, the air-flow velocity making suction airstream conduit air inlet keeps consistent with the granule suspension gas speed calculated, and screen box bottom leakage dust can be sucked dust sucting pipeline by the air-flow in dust sucting pipeline dust suction air port.
CN201610127335.9A 2016-03-07 2016-03-07 Suction type gas flow screen and screening method thereof Pending CN105750202A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201610127335.9A CN105750202A (en) 2016-03-07 2016-03-07 Suction type gas flow screen and screening method thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201610127335.9A CN105750202A (en) 2016-03-07 2016-03-07 Suction type gas flow screen and screening method thereof

Publications (1)

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CN105750202A true CN105750202A (en) 2016-07-13

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109772499A (en) * 2019-01-31 2019-05-21 重庆诚阳农业发展有限公司 Grain separating machine
CN109890519A (en) * 2016-10-18 2019-06-14 赫利俄斯塑料技术设备制造有限公司 Method and apparatus for being especially dusted by ionization to discrete material

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1545821A (en) * 1975-07-04 1979-05-16 Sangati & Filli Sas Combined gravity grading and dry-operating stone removing machine for grain and particularly cereals
CN202683342U (en) * 2012-06-11 2013-01-23 河北宁通电子材料有限公司 Crushed crystal material separation equipment
CN204656913U (en) * 2015-04-30 2015-09-23 曲靖市大兴饲料有限责任公司 A kind of receiving sieve with impurity removal function
CN205393004U (en) * 2016-03-07 2016-07-27 上海岚致环保科技有限公司 Suction formula air current sieve

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1545821A (en) * 1975-07-04 1979-05-16 Sangati & Filli Sas Combined gravity grading and dry-operating stone removing machine for grain and particularly cereals
CN202683342U (en) * 2012-06-11 2013-01-23 河北宁通电子材料有限公司 Crushed crystal material separation equipment
CN204656913U (en) * 2015-04-30 2015-09-23 曲靖市大兴饲料有限责任公司 A kind of receiving sieve with impurity removal function
CN205393004U (en) * 2016-03-07 2016-07-27 上海岚致环保科技有限公司 Suction formula air current sieve

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109890519A (en) * 2016-10-18 2019-06-14 赫利俄斯塑料技术设备制造有限公司 Method and apparatus for being especially dusted by ionization to discrete material
CN109772499A (en) * 2019-01-31 2019-05-21 重庆诚阳农业发展有限公司 Grain separating machine
CN109772499B (en) * 2019-01-31 2020-07-28 重庆诚阳农业发展有限公司 Grain separator

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Application publication date: 20160713