CN103406271A - Fiber grade ultra-high molecular weight polyethylene powder air flow classification method - Google Patents
Fiber grade ultra-high molecular weight polyethylene powder air flow classification method Download PDFInfo
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- CN103406271A CN103406271A CN2013103855929A CN201310385592A CN103406271A CN 103406271 A CN103406271 A CN 103406271A CN 2013103855929 A CN2013103855929 A CN 2013103855929A CN 201310385592 A CN201310385592 A CN 201310385592A CN 103406271 A CN103406271 A CN 103406271A
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Abstract
The invention relates to a fiber grade ultra-high molecular weight polyethylene powder air flow classification method. According to the method, a multi-grade air flow grading system, a cloth bag dust remover, a product stock bin and a rotary discharging valve are adopted to divide a powder material into different particle diameter sections to achieve the aim that the normal distribution width of each particle diameter section of a fiber grade ultra-high molecular weight polyethylene product is shortened, wherein the cloth bag dust remover, the product stock bin and the rotary discharging valve are matched with the multi-grade air flow grading system. By means of the method, nitrogen is recycled, and the good energy-saving effect is achieved.
Description
Technical field
The present invention relates to by the method for powder particle size grade by product classification, relate in particular to a kind of fibre-grade ultrahigh molecular weight polyethylene powder air current classifying method.
Background technology
Mechanical type vibratory sieve classification technology is adopted in polyethylene powder classification at present, its principle is the exciting force that utilizes vibrator (eccentric block or eccentric shaft) to produce, make sieve nest do periodically double vibrations along the exciting force direction, material circumference on compass screen surface is beated, regular to desired compass screen surface, to reach the classification purpose the stock grading of different size by different sieve apertures.Vibratory sieve classification technology exists after classification the particle diameter series distribution of product wide, the problem such as treating capacity is little.
Summary of the invention
Technical problem to be solved by this invention is to provide a kind of fibre-grade ultrahigh molecular weight polyethylene powder air current classifying method that treating capacity is large, shorten the normal distribution width of each particle diameter section of fibre-grade ultra-high molecular weight polyethylene product.
For addressing the above problem, a kind of fibre-grade ultrahigh molecular weight polyethylene powder air current classifying method of the present invention, it is characterized in that: the method comprises the following steps:
1. ultrahigh molecular weight polyethylene powder is transported to the fluid bed I chamber of one-level hierarchy system (fluid bed I chamber and coupled air classifier I are the one-level hierarchy system) through feed auger, then warp is from the first classification of the air-flow of nitrogen cooler, the meal material is transported to fluid bed II chamber by air-flow by fluid bed I chamber in bottom, fluid bed I chamber, fine powder material is transported in the air classifier I and segments by air-flow: a part of powder is taken out of after the air classifier I to enter in the sack cleaner I by air-flow and is separated, separating obtained solid enters product feed bin I and draws off by the rotary discharger I, another part powder is transported to fluid bed II chamber by the interception of air classifier I by the rotary discharger II,
2. the warp of the powder in secondary hierarchy system (fluid bed II chamber and coupled air classifier II are the secondary hierarchy system) fluid bed II chamber is from the first classification of the air-flow of nitrogen cooler, the meal material is transported to fluid bed III chamber by air-flow by fluid bed II chamber in bottom, fluid bed II chamber, fine powder material is transported in the air classifier II and segments by air-flow: a part of powder is taken out of after the air classifier II to enter in the sack cleaner II by air-flow and is separated, and separating obtained solid enters product feed bin II and draws off by the rotary discharger III; Another part powder is tackled by the air classifier II, is transported to fluid bed III chamber through the rotary discharger IV;
3. the warp of the powder in three grades of hierarchy systems (fluid bed III chamber and coupled air classifier III are three grades of hierarchy systems) fluid bed III chamber is from the first classification of the air-flow of nitrogen cooler, the meal material is transported to fluid bed IV chamber by air-flow by fluid bed III chamber in bottom, fluid bed III chamber, fine powder material is transported in the air classifier III and carries out classification by air-flow: a part of powder is taken out of after the air classifier III and is entered the sack cleaner III and separate by air-flow, and separating obtained solid enters product feed bin III and draws off by the rotary discharger V; Another part powder is tackled by the air classifier III, is transported to fluid bed IV chamber through the rotary discharger VI;
4. the powder in fluid bed IV chamber draws off through the rotary discharger VII;
5. in sack cleaner I, sack cleaner II, sack cleaner III, separating obtained gas is transported to through the nitrogen circulation blower fan that nitrogen cooler is cooling laggardly to be entered fluid bed and recycle.
Described hierarchy system is 1 ~ N level, N >=1, and the sack cleaner matched with it, product feed bin and the rotary discharger that is connected with the product feed bin are N.
Described sack cleaner is replaced by the combination of cyclone separator or cyclone separator and sack cleaner.
Described nitrogen cooler is finned or shell and tube.
The present invention compared with prior art has the following advantages:
1, the present invention adopts the Multi-stage airflow hierarchy system, not only can pass through the particle specification of the rotational speed regulation classification of control gas flow rate and air classifier impeller, adjustable range is wide, reach the purpose that shortens each particle diameter section normal distribution width of fibre-grade ultra-high molecular weight polyethylene product, but also have the advantage that treating capacity is large.
2, the present invention recycles nitrogen, has good energy-saving effect.
The accompanying drawing explanation
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in further detail.
Fig. 1 is process chart of the present invention.
In figure: the 1-feed auger, the 2-fluid bed, 3-air classifier I, 4-air classifier II, 5-air classifier III, 6-rotary discharger I, 7-rotary discharger II, 8-rotary discharger III, 9-rotary discharger IV, 10-rotary discharger V, 11-rotary discharger VI, 12-rotary discharger VII, 13-sack cleaner I, 14-sack cleaner II, 15-sack cleaner III, 16-product feed bin I, 17-product feed bin II, 18-product feed bin III, 19-nitrogen circulation blower fan, 20-nitrogen cooler.
The specific embodiment
Embodiment 1
As shown in Figure 1, a kind of fibre-grade ultrahigh molecular weight polyethylene powder air current classifying method, the method comprises the following steps:
1. ultrahigh molecular weight polyethylene powder is transported to the fluid bed 2 I chambers of one-level hierarchy system (fluid bed 2 I chambers and coupled air classifier I 3 are the one-level hierarchy system) through feed auger 1, then warp is from the first classification of the air-flow of nitrogen cooler 20, the meal material is transported to fluid bed 2 II chambers by air-flow by fluid bed 2 I chambers in fluid bed 2 bottoms, I chamber, fine powder material is transported in air classifier I 3 and segments by air-flow: a part of powder is taken out of after air classifier I 3 to enter in sack cleaner I 13 by air-flow and is separated, separating obtained solid enters product feed bin I 16 and draws off by rotary discharger I 6, another part powder is transported to fluid bed 2 II chambers by 3 interceptions of air classifier I by rotary discharger II 7,
2. the warp of the powder in secondary hierarchy system (fluid bed 2 II chambers and coupled air classifier II 4 are the secondary hierarchy system) fluid bed 2 II chambers is from the first classification of the air-flow of nitrogen cooler 20, the meal material is transported to fluid bed 2 III chambers by air-flow by fluid bed 2 II chambers in fluid bed 2 bottoms, II chamber, fine powder material is transported in air classifier II 4 and segments by air-flow: a part of powder is taken out of after air classifier II 4 to enter in sack cleaner II 14 by air-flow and is separated, and separating obtained solid enters product feed bin II 17 and draws off by rotary discharger III 8; Another part powder, by 4 interceptions of air classifier II, is transported to fluid bed 2 III chambers through rotary discharger IV 9;
3. the warp of the powder in three grades of hierarchy systems (fluid bed 2 III chambers and coupled air classifier III 5 are three grades of hierarchy systems) fluid bed 2 III chambers is from the first classification of the air-flow of nitrogen cooler 20, the meal material is transported to fluid bed 2 IV chambers by air-flow by fluid bed 2 III chambers in fluid bed 2 bottoms, III chamber, fine powder material is transported in air classifier III 5 and carries out classification by air-flow: a part of powder is taken out of after air classifier III 5 and is entered sack cleaner III 15 and separate by air-flow, and separating obtained solid enters product feed bin III 18 and draws off by rotary discharger V 10; Another part powder, by 5 interceptions of air classifier III, is transported to fluid bed 2 IV chambers through rotary discharger VI 11;
4. the powder in fluid bed 2 IV chambers draws off through rotary discharger VII 12;
5. in sack cleaner I 13, sack cleaner II 14, sack cleaner III 15, separating obtained gas is transported to through nitrogen circulation blower fan 19 that nitrogen cooler 20 is cooling laggardly to be entered fluid bed 2 and recycle.
Embodiment 2
As shown in Figure 1, a kind of fibre-grade ultrahigh molecular weight polyethylene powder air current classifying method, with
Embodiment 1What the method for describing was different is that hierarchy system is 1 ~ N level, N>=1, and the sack cleaner matched with it, product feed bin and the rotary discharger that is connected with the product feed bin to be N individual.
Embodiment 3
As shown in Figure 1, a kind of fibre-grade ultrahigh molecular weight polyethylene powder air current classifying method, with
Embodiment 1What the method for describing was different is the combination that sack cleaner is replaced by cyclone separator or cyclone separator and sack cleaner.
Embodiment 4
As shown in Figure 1, a kind of fibre-grade ultrahigh molecular weight polyethylene powder air current classifying method, with
Embodiment 2What the method for describing was different is the combination that sack cleaner is replaced by cyclone separator or cyclone separator and sack cleaner.
Embodiment 1, embodiment 2, embodiment 3 and embodiment 4The nitrogen cooler 20 of middle description is finned or shell and tube.
The present invention enters the particle specification of the rotational speed regulation classification of the gas flow rate of fluid bed 2 each chambers and each air classifier impeller by control.
Claims (4)
1. fibre-grade ultrahigh molecular weight polyethylene powder air current classifying method, it is characterized in that: the method comprises the following steps:
1. ultrahigh molecular weight polyethylene powder is transported to fluid bed (2) the I chamber of one-level hierarchy system (fluid bed (2) I chamber and coupled air classifier I (3) are the one-level hierarchy system) through feed auger (1), then through the first classification of air-flow from nitrogen cooler (20), the meal material is transported to fluid bed (2) II chamber by air-flow by fluid bed (2) I chamber in bottom, fluid bed (2) I chamber, fine powder material is transported in air classifier I (3) and segments by air-flow: a part of powder is taken out of after air classifier I (3) to enter in sack cleaner I (13) by air-flow and is separated, separating obtained solid enters product feed bin I (16) and draws off by rotary discharger I (6), another part powder is transported to fluid bed (2) II chamber by air classifier I (3) interception by rotary discharger II (7),
2. the powder in secondary hierarchy system (fluid bed (2) II chamber and coupled air classifier II (4) are the secondary hierarchy system) fluid bed (2) II chamber is through the first classification of air-flow from nitrogen cooler (20), the meal material is transported to fluid bed (2) III chamber by air-flow by fluid bed (2) II chamber in bottom, fluid bed (2) II chamber, fine powder material is transported in air classifier II (4) and segments by air-flow: a part of powder is taken out of after air classifier II (4) to enter in sack cleaner II (14) by air-flow and is separated, separating obtained solid enters product feed bin II (17) and draws off by rotary discharger III (8), another part powder, by air classifier II (4) interception, is transported to fluid bed (2) III chamber through rotary discharger IV (9),
3. the powder in three grades of hierarchy systems (fluid bed (2) III chamber and coupled air classifier III (5) are three grades of hierarchy systems) fluid bed (2) III chamber is through the first classification of air-flow from nitrogen cooler (20), the meal material is transported to fluid bed (2) IV chamber by air-flow by fluid bed (2) III chamber in bottom, fluid bed (2) III chamber, fine powder material is transported in air classifier III (5) and carries out classification by air-flow: a part of powder is taken out of after air classifier III (5) and is entered sack cleaner III (15) and separate by air-flow, separating obtained solid enters product feed bin III (18) and draws off by rotary discharger V (10), another part powder, by air classifier III (5) interception, is transported to fluid bed (2) IV chamber through rotary discharger VI (11),
4. the powder in fluid bed (2) IV chamber draws off through rotary discharger VII (12);
5. in sack cleaner I (13), sack cleaner II (14), sack cleaner III (15), separating obtained gas is transported to through nitrogen circulation blower fan (19) that nitrogen cooler (20) is cooling laggardly to be entered fluid bed (2) and recycle.
2. a kind of fibre-grade ultrahigh molecular weight polyethylene powder air current classifying method as claimed in claim 1, it is characterized in that: described hierarchy system is 1 ~ N level, N >=1, and the sack cleaner matched with it, product feed bin and the rotary discharger that is connected with the product feed bin are N.
3. a kind of fibre-grade ultrahigh molecular weight polyethylene powder air current classifying method as claimed in claim 1 or 2, it is characterized in that: described sack cleaner is replaced by the combining form of cyclone separator or cyclone separator and sack cleaner.
4. a kind of fibre-grade ultrahigh molecular weight polyethylene powder air current classifying method as claimed in claim 1 or 2, it is characterized in that: described nitrogen cooler (20) is finned or shell and tube.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104673270A (en) * | 2015-02-16 | 2015-06-03 | 陕西安信显像管循环处理应用有限公司 | Method for separating rare-earth fluorescent powder from electronic waste powder |
| CN104848655A (en) * | 2015-06-02 | 2015-08-19 | 天华化工机械及自动化研究设计院有限公司 | Method for drying closed circulation fluidized beds by aid of nitrogen and polyethylene with ultrahigh molecular weight |
| CN109622175A (en) * | 2018-11-28 | 2019-04-16 | 上海化工研究院有限公司 | A kind of powder classifying system |
| CN110238059A (en) * | 2019-07-06 | 2019-09-17 | 四川玉塑新材料科技有限公司 | A kind of calcium carbonate powder multiclass classification stage division |
| CN112856933A (en) * | 2019-11-28 | 2021-05-28 | 天华化工机械及自动化研究设计院有限公司 | Horizontal multi-chamber fluidized bed, high-density polyethylene drying system and method |
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| JPH07214002A (en) * | 1994-02-02 | 1995-08-15 | Kanegafuchi Chem Ind Co Ltd | Fine particle removing method for vinyl chloride resin granule for paste working |
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| JPH11309415A (en) * | 1998-04-30 | 1999-11-09 | Kawasaki Heavy Ind Ltd | Method of discharging particles from fluidized bed classifier and device therefor |
| JP2008264657A (en) * | 2007-04-19 | 2008-11-06 | Nippon Steel Corp | Fluidized bed drying and classifying apparatus |
| CN201997481U (en) * | 2011-01-12 | 2011-10-05 | 成都坤森微纳科技有限公司 | High-precision micro powder grading machine |
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Patent Citations (5)
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| JPH07214002A (en) * | 1994-02-02 | 1995-08-15 | Kanegafuchi Chem Ind Co Ltd | Fine particle removing method for vinyl chloride resin granule for paste working |
| JPH08294675A (en) * | 1995-04-26 | 1996-11-12 | Ishikawajima Harima Heavy Ind Co Ltd | Box-shaped fluidized bed type classifier |
| JPH11309415A (en) * | 1998-04-30 | 1999-11-09 | Kawasaki Heavy Ind Ltd | Method of discharging particles from fluidized bed classifier and device therefor |
| JP2008264657A (en) * | 2007-04-19 | 2008-11-06 | Nippon Steel Corp | Fluidized bed drying and classifying apparatus |
| CN201997481U (en) * | 2011-01-12 | 2011-10-05 | 成都坤森微纳科技有限公司 | High-precision micro powder grading machine |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104673270A (en) * | 2015-02-16 | 2015-06-03 | 陕西安信显像管循环处理应用有限公司 | Method for separating rare-earth fluorescent powder from electronic waste powder |
| CN104848655A (en) * | 2015-06-02 | 2015-08-19 | 天华化工机械及自动化研究设计院有限公司 | Method for drying closed circulation fluidized beds by aid of nitrogen and polyethylene with ultrahigh molecular weight |
| CN109622175A (en) * | 2018-11-28 | 2019-04-16 | 上海化工研究院有限公司 | A kind of powder classifying system |
| CN110238059A (en) * | 2019-07-06 | 2019-09-17 | 四川玉塑新材料科技有限公司 | A kind of calcium carbonate powder multiclass classification stage division |
| CN112856933A (en) * | 2019-11-28 | 2021-05-28 | 天华化工机械及自动化研究设计院有限公司 | Horizontal multi-chamber fluidized bed, high-density polyethylene drying system and method |
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Application publication date: 20131127 |