CN102259418A - Vacuum extractor for plastic granulation - Google Patents
Vacuum extractor for plastic granulation Download PDFInfo
- Publication number
- CN102259418A CN102259418A CN2011101986461A CN201110198646A CN102259418A CN 102259418 A CN102259418 A CN 102259418A CN 2011101986461 A CN2011101986461 A CN 2011101986461A CN 201110198646 A CN201110198646 A CN 201110198646A CN 102259418 A CN102259418 A CN 102259418A
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- China
- Prior art keywords
- vacuum
- waste liquid
- gas recycling
- outlet
- circulating water
- 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.)
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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
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
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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
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/365—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using pumps, e.g. piston pumps
- B29C48/37—Gear pumps
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Separation, Recovery Or Treatment Of Waste Materials Containing Plastics (AREA)
Abstract
The invention relates to a vacuum extractor for plastic granulation. The vacuum extractor provided by the invention comprises a vacuum pump, a waste liquid setting tank and a waste gas recycling pipeline, wherein the vacuum pump is connected with the spiral cylinder of a screw extruder by virtue of a vacuum pipeline; the waste liquid setting tank is connected with the vacuum pump; and one end of the waste gas recycling pipeline is communicated with the waste liquid setting tank, the other end of the waste gas recycling pipeline is communicated with the vacuum pipeline, and a pressure regulating valve is arranged on the waste gas recycling pipeline. In the device provided by the invention, the air inflow is regulated by use of the pressure regulating valve on the waste gas recycling pipeline, so that the vacuum degree in the spiral cylinder is controlled within a required range, thus the vacuum material returning problem can be solved; and simultaneously, most micromolecule volatile matters which are not dissolved or precipitated in time in the waste liquid setting tank return into the vacuum pipeline through the waste gas recycling pipeline so as to be further condensed or dissolved, so that the micromolecule volatile matters can be further recycled, thus the production cost is lowered and pollutants discharged into the air are reduced, therefore the device provided by the invention is more environmentally-friendly.
Description
Technical field
The present invention relates to a kind of plastic granulating vacuum extractor, be specifically related to the improvement of the vacuum extractor that links to each other with screw extruder
Background technology
As everyone knows, in the modifying plastics field, use double screw extruder that plastics are carried out the modification granulation mostly.Plastics need to remove the volatile little molecule in the material in through the double screw extruder modifying process, prevent that little molecule volatile matter migrates to the product surface when Injection moulded part, cause the Injection moulded part defective.The little molecule volatile matter of removing in the material mainly is to extract in double-screw extruding machine barrel by water ring vacuum pump at present.The vacuum of water ring vacuum pump can reach-0.1MPa, and the vacuum that extracts little molecule and need be generally-0.08 MPa～-0.06MPa, vacuum is excessive to make the material in the barrel be drawn in the vavuum pump easily, causes the vacuum returning charge, stop up vavuum pump, influence vacuumizes.Usually, a waste liquid settling tank also can be set outside vavuum pump, little molecule volatile matter and after extracting out, enter this waste liquid settling tank through vavuum pump with the mixture of water etc., the water-fast little molecule of a part solidifies in jar and precipitates, the water-soluble little molecule of a part is discharged with water, little molecule these dissolvings or that condensation precipitates can be recycled, but some can not in time be dissolved in the water or the little molecule volatile matter that do not have timely condensation to get off then can be discharged in the air, not only can not recycle, also can cause air pollution
Summary of the invention
Technical problem to be solved by this invention is to overcome the big and little molecule volatile matter of a part of plastics of water ring vacuum pump vacuum of the prior art can not recycle to be drained into and cause environmental pollution problems in the air, and a kind of improved plastic granulating vacuum extractor is provided.
For solving above technical problem, the present invention takes following technical scheme:
A kind of plastic granulating vacuum extractor comprises the vavuum pump with circulating water intake and circulating water outlet, the waste liquid settling tank that links to each other with circulating water outlet; Described vavuum pump links to each other with the barrel of screw extruder by vacuum lead, the lower sidewall of waste liquid settling tank is provided with waste liquid outlet, the bottom is provided with the exhaust outlet that sediment exports, the top is provided with to communicate with atmosphere, described vacuum extractor also comprises an end and the exhaust gas recycling tube road that the waste liquid settling tank is connected, the other end is connected with vacuum lead, and this exhaust gas recycling tube road is provided with pressure-regulating valve.
As a further improvement on the present invention, the horizontal level of waste liquid outlet should be lower than the horizontal level of circulating water outlet, the horizontal level of the interface of exhaust gas recycling tube road and waste liquid settling tank is higher than the horizontal level of circulating water outlet, and exhaust outlet arrives vertical range 〉=this interface of this interface to the vertical range between the circulating water outlet.
Because the enforcement of above technical scheme, the present invention compared with prior art has following advantage:
Vacuum extractor of the present invention is owing to be provided with an exhaust gas recycling tube road between waste liquid settling tank and vacuum lead, regulate charge flow rate by the pressure-regulating valve on this exhaust gas recycling tube road, the vacuum that can control vavuum pump in needed scope (0.08 MPa～-0.06MPa), simultaneously, in time the dissolving or the little molecule volatile matter of condensation also can come back in the vacuum lead by this exhaust gas recycling tube road major part in the waste liquid settling tank, carry out the condensation or the dissolving of a new round, little molecule volatile matter can be recycled further, reduced production cost, reduced and be discharged into airborne pollutant, more environmental protection.
Description of drawings
The present invention will be further described in detail below in conjunction with accompanying drawing and concrete embodiment:
Fig. 1 is the structural representation of vacuum extractor of the present invention;
Wherein: 1, vavuum pump; 10, circulating water intake; 11, circulating water outlet; 12, vacuum lead; 2, waste liquid settling tank; 20, waste liquid outlet; 21, sediment outlet; 22, exhaust outlet; 3, exhaust gas recycling tube road; 30, interface; 4, pressure-regulating valve.
The specific embodiment
The present invention will be further described in detail below in conjunction with specific embodiment, but be not limited to these embodiment.
The plastic granulating of present embodiment links to each other with the barrel of double screw extruder with vacuum extractor, is used for that plastics are extruded the little molecule volatile matter that adds man-hour and extracts out.
As shown in Figure 1, the vacuum extractor according to present embodiment comprises the vavuum pump 1 with circulating water intake 10 and circulating water outlet 11, the waste liquid settling tank 2 that links to each other with circulating water outlet 11; Vavuum pump 1 links to each other with the barrel of double screw extruder by vacuum lead 12, and the lower sidewall of waste liquid settling tank 2 is provided with waste liquid outlet 20, bottom and is provided with the exhaust outlet 22 that sediment exports 21, the top is provided with to communicate with atmosphere.According to present embodiment, this vacuum extractor also comprises the exhaust gas recycling tube road 3 that an end is connected with waste liquid settling tank 2, the other end is connected with vacuum lead 12, and this exhaust gas recycling tube road 3 is provided with pressure-regulating valve 4.
According to present embodiment, the material in vacuum lead 12 and exhaust gas recycling tube road 3 for bearing-stainless steel pipes of 0.1MPa, pipe diameter is 3cm～6cm; Waste liquid settling tank 2 and remaining pipes are the common stainless steel material.
In the present embodiment, the horizontal level of waste liquid outlet 20 is lower than 8 centimetres of the horizontal levels of circulating water outlet 11, the horizontal level at exhaust gas recycling tube road 3 and interface 30 places of waste liquid settling tank 2 is higher than 8 centimetres of the horizontal levels of circulating water outlet 11, and exhaust outlet 22 to the vertical range of this interface 30 between 10 centimetres～20 centimetres.
The plastic granulating of present embodiment is as follows with the operation principle of environmental protection vacuum extractor:
During operate as normal, the valve closing of sediment outlet 21, the valve of waste liquid outlet 20 and pressure-regulating valve 4 are opened, the negative pressure requirement that sets according to extruding and pelletizing process, by the range of negative pressure in size (being air inflow) the control barrel of regulating pressure-regulating valve 4, the negative pressure of general recirculated water vavuum pump is at-0.1MPa, and the needed range of negative pressure of technology-0.08 MPa～-0.06MPa, therefore, pressure-regulating valve 4 can be opened to a certain degree, be shared the residue negative pressure (MPa ~-0.02 MPa promptly-0.04) of recirculated water vavuum pump.Recirculated water from circulating water intake 10 enter vavuum pump 1(Fig. 1 A to), vavuum pump 1 running produces negative pressure, extract the little molecule volatile matter in the double-screw extruding machine barrel, little molecule volatile matter by vacuum lead 12 enter B among vavuum pump 1(Fig. 1 to) and mix with recirculated water in the vavuum pump 1, enter the waste liquid settling tank 2 (among Fig. 1 D to) from circulating water outlet 11 again.In waste liquid settling tank 2, the condensation of the little molecule volatile matter of part precipitates, the little molecule volatile matter of part is dissolved in the water from waste liquid outlet 20 and discharges (Fig. 1 F to), remainder do not precipitate with undissolved little molecule volatile matter under certain residue suction function, get back to vacuum lead 12(Fig. 1 from exhaust gas recycling tube road 3 C to), and be drawn into again in the vavuum pump 1 and mix with recirculated water, proceed the process of condensation or dissolving.Certainly, in process of production, do not get rid of the little molecule volatile matter that minute quantity is arranged and from exhaust outlet 22, to enter atmosphere (among Fig. 1 E to), but this has been controlled in the environmental requirement scope.
In addition, the vacuum extractor of present embodiment need regularly be opened the valve that sediment exports 21 places, and the waste material of precipitation in the cleaning waste liquid settling tank 2 is to keep jar internal drainage unimpeded.
Technical scheme of the present invention is simple in structure, and configuration is easy to operate easily.Not only the vacuum in the adjusting screw(rod) extruder as required can also be recycled the little molecule volatile matter of part, reduces production costs, and reduces air pollution, and is very practical and be worthy to be popularized.
More than the present invention has been done detailed description; its purpose is to allow the personage that is familiar with this art can understand content of the present invention and is implemented; can not limit protection scope of the present invention with this; all equivalences of doing according to spiritual essence of the present invention change or modify, and all should be encompassed in protection scope of the present invention
Claims (2)
1.
A kind of plastic granulating vacuum extractor comprises have circulating water intake (10) and the vavuum pump (1) of circulating water outlet (11), the waste liquid settling tank (2) that links to each other with circulating water outlet (11); Described vavuum pump (1) links to each other with the barrel of screw extruder by vacuum lead (12), the lower sidewall of described waste liquid settling tank (2) is provided with waste liquid outlet (20), bottom and is provided with sediment outlet (21), exhaust outlet (22) that the top is provided with to communicate with atmosphere, it is characterized in that: described vacuum extractor also comprises the exhaust gas recycling tube road (3) that an end is connected with described waste liquid settling tank (2), the other end is connected with described vacuum lead (12), and described exhaust gas recycling tube road (3) is provided with pressure-regulating valve (4)
2.
Plastic granulating vacuum extractor according to claim 1, it is characterized in that: the horizontal level of described waste liquid outlet (20) is lower than the horizontal level of described circulating water outlet (11), the horizontal level that the interface (30) of described exhaust gas recycling tube road (3) and described waste liquid settling tank (2) is located is higher than the horizontal level of described circulating water outlet (11), and described exhaust outlet (22) arrives the vertical range 〉=described interface (30) of described interface (30) to the vertical range between the described circulating water outlet (11)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101986461A CN102259418B (en) | 2011-07-15 | 2011-07-15 | Vacuum extractor for plastic granulation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101986461A CN102259418B (en) | 2011-07-15 | 2011-07-15 | Vacuum extractor for plastic granulation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102259418A true CN102259418A (en) | 2011-11-30 |
| CN102259418B CN102259418B (en) | 2013-06-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011101986461A Active CN102259418B (en) | 2011-07-15 | 2011-07-15 | Vacuum extractor for plastic granulation |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103940256A (en) * | 2014-04-11 | 2014-07-23 | 张曙光 | Power plant condenser steam jet and vacuumizing system with pressure control function |
| CN106738758A (en) * | 2016-12-14 | 2017-05-31 | 泗县鸿盛塑业有限公司 | Extruding machine vacuum extractor |
| CN114407321A (en) * | 2021-11-12 | 2022-04-29 | 江苏集萃功能材料研究所有限公司 | Low-molecular condensate and gas separation device of vacuum system of double-screw extruder |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4181510A (en) * | 1977-10-07 | 1980-01-01 | Kobe Steel, Limited | Waste gas discharging device for use in injection molding machine |
| DE4424779A1 (en) * | 1994-07-14 | 1996-01-18 | Battenfeld Extrusionstech | Degassing fluid, esp. polymer melts and process plant |
| JPH1073079A (en) * | 1996-08-30 | 1998-03-17 | Shin Etsu Polymer Co Ltd | Water and air cleaning method for water sealed type vacuum pump |
| KR20020021507A (en) * | 2000-09-15 | 2002-03-21 | 안복현 | Vacuum system |
| CN201198190Y (en) * | 2008-04-03 | 2009-02-25 | 上海金发科技发展有限公司 | Vacuum extraction apparatus of plastic extrusion machine |
| CN202213189U (en) * | 2011-07-15 | 2012-05-09 | 江苏金发科技新材料有限公司 | Vacuumizing device for plastic pelleting |
-
2011
- 2011-07-15 CN CN2011101986461A patent/CN102259418B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4181510A (en) * | 1977-10-07 | 1980-01-01 | Kobe Steel, Limited | Waste gas discharging device for use in injection molding machine |
| DE4424779A1 (en) * | 1994-07-14 | 1996-01-18 | Battenfeld Extrusionstech | Degassing fluid, esp. polymer melts and process plant |
| JPH1073079A (en) * | 1996-08-30 | 1998-03-17 | Shin Etsu Polymer Co Ltd | Water and air cleaning method for water sealed type vacuum pump |
| KR20020021507A (en) * | 2000-09-15 | 2002-03-21 | 안복현 | Vacuum system |
| CN201198190Y (en) * | 2008-04-03 | 2009-02-25 | 上海金发科技发展有限公司 | Vacuum extraction apparatus of plastic extrusion machine |
| CN202213189U (en) * | 2011-07-15 | 2012-05-09 | 江苏金发科技新材料有限公司 | Vacuumizing device for plastic pelleting |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103940256A (en) * | 2014-04-11 | 2014-07-23 | 张曙光 | Power plant condenser steam jet and vacuumizing system with pressure control function |
| CN103940256B (en) * | 2014-04-11 | 2016-04-20 | 张曙光 | With pressure controlled plant condenser vapor injection vacuum pumping system |
| CN106738758A (en) * | 2016-12-14 | 2017-05-31 | 泗县鸿盛塑业有限公司 | Extruding machine vacuum extractor |
| CN114407321A (en) * | 2021-11-12 | 2022-04-29 | 江苏集萃功能材料研究所有限公司 | Low-molecular condensate and gas separation device of vacuum system of double-screw extruder |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102259418B (en) | 2013-06-12 |
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