CN102079130B - Method for removing impurities and floating foams in water channel in BOPP (Biaxially-Oriented Polypropylene) film production line - Google Patents
Method for removing impurities and floating foams in water channel in BOPP (Biaxially-Oriented Polypropylene) film production line Download PDFInfo
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- CN102079130B CN102079130B CN2010102845220A CN201010284522A CN102079130B CN 102079130 B CN102079130 B CN 102079130B CN 2010102845220 A CN2010102845220 A CN 2010102845220A CN 201010284522 A CN201010284522 A CN 201010284522A CN 102079130 B CN102079130 B CN 102079130B
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- water
- tank
- offscum
- water channel
- buffering
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/07—Flat, e.g. panels
- B29C48/08—Flat, e.g. panels flexible, e.g. films
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/919—Thermal treatment of the stream of extruded material, e.g. cooling using a bath, e.g. extruding into an open bath to coagulate or cool the material
Abstract
The invention relates to a method for removing impurities and floating foams in a water channel in a BOPP (Biaxially-Oriented Polypropylene) film production line. In the technical scheme, devices such as a water circulating pump, a buffering and filtering water tank and the like are additionally provided on the basis of the original water channel in the production line, the exit of the water channel is appropriately arranged to be a flow diversion form, process water containing the impurities is pumped into the buffering and filtering water tank for circulation and multi-stage filtering, a particular overflow mouth is arranged behind the water channel to further remove the floating foams, thus automatic purification of the process water in the water channel is realized, the problems of spots (white dots) and granules on the film or film broken due to poor-quality water are avoided, the water consumption is reduced, and the cleaning period of the water channel is prolonged. Moreover, the method is particularly suitable for removing the impurities in the water channel in a piece casting process in the BOPP film production line.
Description
Technical field
The invention belongs to the method for tank water impurity and offscum in a kind of BOPP of removing production line.
Background technology
BOPP film line slab process mainly adopts the water-bath mode to cool off both at home and abroad at present.In extruding the slab process, sheet material under the high temperature fused state enters tank again and carries out the water-bath cooling after sharp cooling roll cools off fast, in melt water-bath quenching process, plastic additive low molecular weight volatile thing in the raw material can produce a large amount of flue gases, these flue gas parts are condensate on the air knife and form droplet and drop to tank, another part then Zhejiang in the water-bath, because it is water insoluble to give volatile matter in these organic low minute, so can only be suspended in the water or form offscum.
Although former tank cooling water pump is provided with screen pack at pump intake, because the large flow velocity of discharge is fast, the suspension in the water can't filter at all, and the mode of the fresh water by replenishing capacity to be reducing gathering of offscum in addition, but effect is limited and water consumption is large.Along with the prolongation of production time, tank water is more and more dirty dirty, and impurity causes larger harm to the outward appearance of product in these water, and film can produce opaque spot (white point) and particle, more can cause rupture of membranes when more obvious, has a strong impact on to produce and quality.For addressing this problem, method commonly used is often to need all fronts downtime tank and change water, has reduced virtually production efficiency and has increased again cost.
Summary of the invention
The method that the purpose of this invention is to provide tank impurity and offscum in a kind of BOPP of removing film line, can automatically remove in process of production impurity and offscum in the water, avoid poor water quality to cause film spot (white point), particle to occur and cause rupture of membranes, the cycle of significant prolongation cleaning tank, enhance productivity, using water wisely affects the large problem of production and quality and water consumption thereby the solution water-bath water is easy contaminated.
The present invention is installed a buffering water tank with strainer and water pump additional at former tank, making the interior water of tank constantly be extracted into the buffering water tank with strainer by water pump filters, require water tank inside that the layer 2-4 stainless steel filtering net is set according to filtration, filter screen order number is by the product requirement of producing, pump capacity, the buffering water tank with strainer size and decide, be generally the 100-250 order, the deflector roll below is provided with the tank outlet, trapezoidal water conservancy diversion form is arranged in the tank outlet, utilize the airflow function of the air knife that dewaters in the original device, impurity and part offscum are directed near the water pump filter, after being evacuated to the buffering water tank with strainer, are removed efficiently.
For improving the automatic removing effect of offscum, respectively install a de-floating device additional in the tank outlet, offer the profile of tooth osculum on every side, aperture position is little to be lower than the water surface, making the offscum that floats on the water surface automatically enter little tank with the small size rolling of current and water discharges, for guaranteeing the discharge of tank water level and offscum, in the buffering water tank with strainer, install one additional and replenish water intaking valve, the water yield can be regulated.
Effect of the present invention is: avoided in the BOPP film production because water quality is former thereby cause product spot (white point) and particle to occur and demote, and the rupture of membranes that therefore causes, prolong the cleaning frequency of tank more than one times, in addition owing to water consumption has been saved in the significantly minimizing of overflow water.
Description of drawings
Fig. 1 is structural representation of the present invention;
Fig. 2 is offscum device structure for amplifying schematic diagram of the present invention;
Fig. 3 is that offscum device structure for amplifying A of the present invention is to diagram;
Fig. 4 is the structural representation that the present invention cushions water tank with strainer;
Fig. 5 is that the present invention cushions the B of water tank with strainer to diagram.
The specific embodiment
In Fig. 1, set up before and after the tank except offscum device 5 and tank is inboard links to each other, on welding and the front and back flume wall.
Supported by pole 18 at the medium and small tank 20 of Fig. 2, regulate height by adjusting bolt 17, make the lower slightly water surface 4 with tank 3 in zigzag bottom in the little tank 20, be convenient to offscum and automatically flow to little tank 20 with water, and by flexible pipe 19 outside sewage draining exit 14 discharge systems.The discharge effect of offscum is relevant with the unlatching size of additional water valve 8, replenishes the influent side that water valve 8 is installed at buffering water tank with strainer 10, and production period is opened a little and replenished water valve 8, so that tank 3 produces certain overflow, so that the removal of offscum.Amount of makeup water is large, and overflow water is many, and it is just better automatically to remove on the water surface 4 the offscum effect.
In Fig. 2,3, the outer circulation water pump 12 gentle water filtering tanks 10 of breaking through are fixed on the shelf that links to each other with tank 3 outlets.
In Fig. 4,5, in the 11 laterally inserted tank waters of water sucking mouth, the about 10CM of the degree of depth, behind the starting mode of pump, tank water enters in the buffering water tank with strainer 10 by pipeline, and under the effect of filter screen 15, impurity and part offscum are filtered in the water, thereby realize the purpose of automated cleaning.Dirty when dirty when filter screen 15, the water pump 12 that stops can come into operation behind the cleaning filter screen 15 again.
It should be noted that, the flow of water pump 12 is chosen and will be complementary with the order number of buffering water tank with strainer 10 sizes, filter screen 15, water pump 12 flows of choosing are larger, then cushion water tank with strainer 10 sizes and will strengthen, otherwise cause that owing to the rate of filtration does not catch up with water overflows across and impact effect from filter screen 15 napexes.Typical dimensions is as follows:
Buffering water tank with strainer 10 dimensions: 450 * 600 * 450
Filter screen 15 order numbers (three grades): 250/150/100
Claims (2)
1. method of removing tank impurity and offscum in the BOPP film line, it is characterized in that: install a buffering water tank with strainer (10) and water pump (12) additional at former tank (3), making the interior water of tank (3) constantly be extracted into buffering water tank with strainer (10) by water pump (12) filters, require water tank (10) inside that layer 2-4 stainless steel filtering net (15) is set according to filtration, filter screen (15) order number is by the product requirement of producing, pump capacity, the buffering water tank with strainer (10) size and decide, be the 100-250 order, deflector roll (7) below is provided with the tank outlet, trapezoidal water conservancy diversion form is arranged in the tank outlet, utilize the airflow function of the air knife that dewaters in the original device, impurity and part offscum are directed near the filter (11) of water pump (12), must be to removing efficiently after being evacuated to buffering water tank with strainer (10).
2. according to a kind of method of removing tank impurity and offscum in the BOPP film line claimed in claim 1, it is characterized in that: respectively install a de-floating device (5) additional in the tank outlet, offer the profile of tooth osculum on every side, aperture position is little to be lower than the water surface (4), making the offscum that floats on the water surface (4) automatically enter little tank (20) with the small size rolling of current and water discharges, for guaranteeing the discharge of tank (3) water level and offscum, install one additional and replenish water intaking valve (8) in buffering water tank with strainer (10), the water yield can be regulated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102845220A CN102079130B (en) | 2010-09-10 | 2010-09-10 | Method for removing impurities and floating foams in water channel in BOPP (Biaxially-Oriented Polypropylene) film production line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102845220A CN102079130B (en) | 2010-09-10 | 2010-09-10 | Method for removing impurities and floating foams in water channel in BOPP (Biaxially-Oriented Polypropylene) film production line |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102079130A CN102079130A (en) | 2011-06-01 |
| CN102079130B true CN102079130B (en) | 2013-05-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010102845220A Active CN102079130B (en) | 2010-09-10 | 2010-09-10 | Method for removing impurities and floating foams in water channel in BOPP (Biaxially-Oriented Polypropylene) film production line |
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| CN (1) | CN102079130B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1772332A (en) * | 2005-10-14 | 2006-05-17 | 浙江金菱制冷工程有限公司 | Draining Filter specially for cooling tower |
| CN200957305Y (en) * | 2006-07-04 | 2007-10-10 | 刘志敏 | Condensed purifier for polyvinyl chloride paste resin dip plastic coating production line |
| CN201020647Y (en) * | 2006-11-14 | 2008-02-13 | 杭州博士杰机械科技有限公司 | Cooling water filtering and circulation system for ultra-thin glass edge-grinding apparatus |
| CN201470218U (en) * | 2009-08-19 | 2010-05-19 | 王星月 | Floater type filtering device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0667584B2 (en) * | 1988-07-09 | 1994-08-31 | 出光石油化学株式会社 | Method for producing polypropylene-based resin sheet and resin sheet obtained thereby |
| US20060228480A1 (en) * | 2005-03-30 | 2006-10-12 | David Lin | Method of manufacturing a release liner |
-
2010
- 2010-09-10 CN CN2010102845220A patent/CN102079130B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1772332A (en) * | 2005-10-14 | 2006-05-17 | 浙江金菱制冷工程有限公司 | Draining Filter specially for cooling tower |
| CN200957305Y (en) * | 2006-07-04 | 2007-10-10 | 刘志敏 | Condensed purifier for polyvinyl chloride paste resin dip plastic coating production line |
| CN201020647Y (en) * | 2006-11-14 | 2008-02-13 | 杭州博士杰机械科技有限公司 | Cooling water filtering and circulation system for ultra-thin glass edge-grinding apparatus |
| CN201470218U (en) * | 2009-08-19 | 2010-05-19 | 王星月 | Floater type filtering device |
Non-Patent Citations (1)
| Title |
|---|
| JP平2-20320A 1990.01.23 |
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| CN102079130A (en) | 2011-06-01 |
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