CN103727770A - Hopper drying device, plastic raw material drying method and multi-stage material drying machine - Google Patents
Hopper drying device, plastic raw material drying method and multi-stage material drying machine Download PDFInfo
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- CN103727770A CN103727770A CN201310712205.8A CN201310712205A CN103727770A CN 103727770 A CN103727770 A CN 103727770A CN 201310712205 A CN201310712205 A CN 201310712205A CN 103727770 A CN103727770 A CN 103727770A
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Abstract
The invention discloses a hopper drying device. The hopper drying machine comprises a drying container, a heater and a gas driving device which are sequentially connected to one another through a pipe to form gas circulation; a dry gas inlet and a wet gas outlet are also formed in the pipe; and the dry gas inlet is connected with a dry gas source. The invention also provides a plastic raw material drying method and a multi-stage material drying machine. The gas circulation is formed by using the drying container, the heater and the gas driving device, so that most of drying heat energy in a whole circulation process can be recycled; dry gas is fed in the hopper drying device, the outlet is formed in the hopper drying device to discharge wet gas, and the drying speed is increased by using the dry gas; and repeated circulation of the wet gas is reduced by discharging the wet gas, energy consumption on drying of raw materials is reduced, the drying quality of materials to be dried can be high, drying time is short, and energy consumption is reduced.
Description
Technical field
The present invention relates to the drying unit technical field of the raw material of injection (mo(u)lding) machine, specifically refer to a kind of hopper drying unit, plastic material drying means and multistage materal drier, be applicable to raw material solid particle dry of plastic cement, powdered metallurgical material equigranular or powdery.
Background technology
In injection molding technique, because the raw material of granular or powdery is dried fully, can cause the bad phenomenon such as product gassing, crazing, current mark.Therefore, injection molding technique generally first joins the raw material of granular or powdery in the storage vat of dryer, after drying machine drying, this raw material is sent in the hopper of injection (mo(u)lding) machine by the Transfer pipe of dryer again, when injection piston retreats, raw material falls into barrel quantitatively from hopper, through being heated to flow regime, under the screw rod of injection (mo(u)lding) machine or the promotion of plunger, with certain flow velocity, running gate system by nozzle and close die is full of die cavity, through the cooling and shaping of certain hour, open mould, from deviating from the injection member of moulding in mould.Injection molding technique is widely used in the production of the materials such as pottery, condensate with advantages such as low cost, high efficiency, high accuracy.
As shown in Figure 1, air drier adopts air heat method dry plastics to existing hopper drying unit.Hopper drying unit comprises hopper 1, blower fan 2 and heater 3, and its principle is after air heat, to make its relative humidity decline to a great extent, thereby frosting and internal moisture evaporation make raw material drying.During heating, blower fan 2 continues air-supply, heater via 3 is delivered to hopper, there is a temperature measuring equipment 4 at fire end rear portion, by with the contrast of the predefined temperature of contrast, when temperature is during lower than a certain difference of setting value, heater 3 heats, when higher than setting value a certain difference time, heater 3 stops, and controls thus heating power and temperature.There is following defect in above-mentioned hopper drying unit: the air heating in heating process is discharged hopper simultaneously, hot blast is not recycled, and this mode can cause the lengthening of drying time and then waste unnecessary electric energy.When particularly in hopper, raw material is more, wind speed significantly reduces, and heating power reduces, and causes reaching heating power and the heat energy that goal-setting temperature actual needs is higher.
Application number is that 201310260910.9 application for a patent for invention discloses a kind of hopper drying unit, described drying unit comprises: hopper, air-heater, described hopper top is provided with filter and is connected with described hopper, described hopper downside is connected with one end of the first airduct, the other end of described the first airduct is connected with the air outlet of described air-heater, the air inlet of described air-heater is connected with one end of the second airduct, the other end of described the second airduct is connected with dewater unit, described dewater unit is connected with described filter by the 3rd airduct, the hopper drying unit of said structure recycles to improve drying efficiency and saves electric energy hot blast, but its whole cyclic process moisture is discharged by complicated dewater unit, cause plastics energy consumption for drying high.
Summary of the invention
The object of the invention is to overcome weak point of the prior art, a kind of hopper drying unit is provided, it not only carries out recycling to hot blast major part, and raw material is fully dry, and drying efficiency is higher.
The object of the invention is to be achieved through the following technical solutions:
A kind of hopper drying unit, comprise the drying receptacle, heater, the gas actuating device that by pipeline, connect to form successively gas circulation, it is characterized in that: on described pipeline, be also provided with dry gas entrance and humid gas outlet, described dry gas entrance is connected with a dry gas source.
Concrete, described hopper drying unit also comprises the separator for separating of the impurity in gas, described separator is arranged on the pipeline between drying receptacle and heater.
Concrete, described separator is provided with air cleaner.
Concrete, described separator is also provided with solid particle thing gathering-device.
Concrete, described gas actuating device is air amplifier or air-heater.
Preferably, described drying receptacle adopts low thermal conductivity material and/or has thermal insulation layer.
Based on same design, the present invention also provides a kind of plastic material drying means, comprising:
Material to be dried enters drying receptacle from drying receptacle entrance, and drying receptacle seals afterwards and gas actuating device, heater form gas circulation by pipeline;
In the pipeline of this gas circulation, access dry gas source, and humid gas outlet is set in pipeline;
Start gas actuating device, heater, reach after target is dried requirement dried feed is discharged from drying receptacle outlet.
Based on same design, the present invention also provides a kind of multistage materal drier, comprise multiple connect successively first to N hopper drying unit, every hopper drying unit comprises the drying receptacle, heater and the gas actuating device that by pipeline, connect to form successively gas circulation, the drying receptacle of 2 adjacent hopper drying units is interconnected by pipeline, the drying receptacle of described the 1st hopper drying unit is provided with dry gas entrance, and described dry gas entrance is connected with a dry gas source; Described N hopper drying unit is provided with humid gas outlet, and wherein, N is more than or equal to 2 natural number.
The present invention has the following advantages and beneficial effect compared to existing technology:
1, the present invention is by drying receptacle, heater, gas actuating device composition gas circulation, make most recovery of dry heat energy of whole cyclic process, pass into again dry gas simultaneously and outlet is set and discharge moisture, by dry gas, reduce heating power, promote rate of drying; By discharging moisture, reduce the iterative cycles of moisture, reduce the energy consumption of dried feed, can make the dry quality of material to be dried higher, drying time is shorter, saves energy consumption.
2, adopt multistage materal drier of the present invention, multilevel drying can require high material by drying quality, saves energy consumption simultaneously, is suitable for wider temperature and humidity scope, safer, and maintenance cost is low.
3, dry gas source of the present invention can adopt and will after compressed air drying, obtain, and compressed air is easy to obtain, cost is lower, predrying technical maturity, is easy to existing plastics or other dry industry to reequip.
4, gas actuating device of the present invention can adopt air amplifier, adopts dried gas as air force, is more conducive to gas piping sealing, reduces gas actuating device energy consumption, improves device stability.
Accompanying drawing explanation
Fig. 1 is the hopper drying unit structural representation of prior art;
Fig. 2 is the structural representation of hopper drying unit of the present invention;
Fig. 3 is the flow chart of plastic material drying means of the present invention;
Fig. 4 is the theory structure block diagram of the multistage materal drier of the present invention.
The specific embodiment
Below in conjunction with embodiment and accompanying drawing, the present invention is described in further detail, but embodiments of the present invention are not limited to this.
Embodiment
As Fig. 2, the present embodiment provides a kind of hopper drying unit, comprise the drying receptacle 1, heater 3, the gas actuating device 5 that by pipeline, connect to form successively gas circulation, on described pipeline, be also provided with dry gas entrance 6 and humid gas outlet 7, described dry gas entrance 6 is connected with a dry gas source 8.Described hopper drying unit also comprises the separator 9 for separating of the impurity in gas, and described separator 9 is arranged on the pipeline between drying receptacle 1 and heater 3.Separator is by ducted gas separating filter, effectively overcome and without impurity such as the airborne dust of separating and filtering cycle for the treatment of, powder, directly entered hopper and cause the contaminated defect of clean raw material, reduce assorted some stain of injection member product, when improving injection member product yields, improved the baking material effect of plastic baking machine.
Described dry gas source 8 can adopt one or more processing in compressed gas dry, freeze drying, adsorption dry are obtained, preferred as one, above-mentioned dry gas source 8 through oil removings and or filtration treatment.
Described separator 9 is provided with air cleaner.
Concrete, described separator 9 is also provided with solid particle thing gathering-device.Prevent that in passage, the material particles of the overconcentration of power in the managerial system causes reducing circulation rate and/or damages heater.
Described gas actuating device 5 is air amplifier or air-heater.
In order to reduce hopper thermal losses, described drying receptacle 1 adopts low thermal conductivity material and/or has thermal insulation layer.
Refer to Fig. 3, for adopting hopper drying unit in Fig. 2 flow chart to the plastic material drying means in the hopper of injection (mo(u)lding) machine.This plastic material drying means comprises the following steps:
(1) material to be dried enters drying receptacle from drying receptacle entrance, and drying receptacle seals afterwards and gas actuating device, heater form gas circulation by pipeline;
(2) in the pipeline of this gas circulation, access dry gas source, and humid gas outlet is set in pipeline;
(3) start gas actuating device, heater, dried feed is discharged from drying receptacle outlet after reaching dry requirement.
Refer to Fig. 4, the present invention also provides a kind of multistage materal drier, comprise multiple connect successively first to N hopper drying unit, every hopper drying unit comprises the drying receptacle, heater and the gas actuating device that by pipeline, connect to form successively gas circulation, the drying receptacle of 2 adjacent hopper drying units is interconnected by pipeline, the drying receptacle of described the 1st hopper drying unit is provided with dry gas entrance, and described dry gas entrance is connected with a dry gas source; Described N hopper drying unit is provided with humid gas outlet, and wherein, N is more than or equal to 2 natural number.
Inventor finds in the existing drying materials device procedures of use, heating energy consumption in plastics drying process and fan energy consumption are total input energy consumption, energy consumption is assigned as: plastic heating accounts for the evaporation of 5-30%, water and accounts for that <5%, hot blast heat extraction account for >40%, hopper thermal losses accounts for 20-30%, plastics are dried to real effectively energy consumption less than 5%, consider plastic heating energy consumption, effectively utilize energy consumption less than 35%.
Adopt hopper drying unit of the present invention or multistage materal drier, take PC material as example, its initial water content approximately 0.2%, be heated to 120 ℃, adopt access dry air and discharge moisture to be dried, hopper adopts hot air circulating system, approximately 2 grams/cubic metre of intake air humidity, 15 grams/cubic metre of air outlet slit humidity, every kilogram of material needs the dry air of 0.15 cubic metre, the about 72kJ of dry air energy consumption.Contrast traditional plastic heating technique and save energy consumption 228kJ, the about 180KJ of actual saving, saves approximately 40%.
Above-described embodiment is preferably embodiment of the present invention; but embodiments of the present invention are not restricted to the described embodiments; other any do not deviate from change, the modification done under Spirit Essence of the present invention and principle, substitutes, combination, simplify; all should be equivalent substitute mode, within being included in protection scope of the present invention.
Claims (10)
1. a hopper drying unit, comprise the drying receptacle, heater, the gas actuating device that by pipeline, connect to form successively gas circulation, it is characterized in that: on described pipeline, be also provided with dry gas entrance and humid gas outlet, described dry gas entrance is connected with a dry gas source.
2. hopper drying unit according to claim 1, is characterized in that: described hopper drying unit also comprises the separator for separating of the impurity in gas, and described separator is arranged on the pipeline between drying receptacle and heater.
3. hopper drying unit according to claim 2, is characterized in that: described separator is provided with air cleaner.
4. hopper drying unit according to claim 3, is characterized in that: described separator is also provided with solid particle thing gathering-device.
5. according to hopper drying unit described in claim 1-4 any one, it is characterized in that: described gas actuating device is air amplifier or air-heater.
6. hopper drying unit according to claim 5, is characterized in that: described drying receptacle adopts low thermal conductivity material and/or has thermal insulation layer.
7. a plastic material drying means that adopts hopper drying unit described in claim 1-6 any one, comprising:
Material to be dried enters drying receptacle from drying receptacle entrance, drying receptacle be sealed close after and gas actuating device, heater by pipeline, form gas circulation;
In the pipeline of this gas circulation, access dry gas source, and humid gas outlet is set in pipeline;
Start gas actuating device, heater, reach after target is dried requirement dried feed is discharged from drying receptacle outlet.
8. plastic material drying means according to claim 7, is characterized in that: described gas actuating device is air amplifier or air-heater.
9. a multistage materal drier, it is characterized in that: comprise multiple connect successively first to N hopper drying unit, every hopper drying unit comprises the drying receptacle, heater and the gas actuating device that by pipeline, connect to form successively gas circulation, the drying receptacle of 2 adjacent hopper drying units is interconnected by pipeline, the drying receptacle of described the 1st hopper drying unit is provided with dry gas entrance, and described dry gas entrance is connected with a dry gas source; Described N hopper drying unit is provided with humid gas outlet, and wherein, N is more than or equal to 2 natural number.
10. multistage materal drier according to claim 9, is characterized in that: described gas actuating device is air amplifier or air-heater.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310712205.8A CN103727770A (en) | 2013-12-20 | 2013-12-20 | Hopper drying device, plastic raw material drying method and multi-stage material drying machine |
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| CN201310712205.8A CN103727770A (en) | 2013-12-20 | 2013-12-20 | Hopper drying device, plastic raw material drying method and multi-stage material drying machine |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105526795A (en) * | 2015-11-30 | 2016-04-27 | 亿和精密工业（苏州）有限公司 | Circulating drying device and cleaning machine comprising same |
| CN105568207A (en) * | 2015-12-29 | 2016-05-11 | 中国石油化工股份有限公司 | Oxidation treatment device for surface of structured packing |
| CN106363177A (en) * | 2016-08-26 | 2017-02-01 | 重庆新钰立金属科技有限公司 | Powder metallurgy drying device |
| CN106862095A (en) * | 2017-03-08 | 2017-06-20 | 安徽神农光电机械有限公司 | A kind of color selector with new feeding device |
| CN110757718A (en) * | 2019-11-29 | 2020-02-07 | 苏州毫厘文化传媒科技有限公司 | Hopper formula of circulation material loading is moulded plastics and is used desiccator |
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| WO1997005437A1 (en) * | 1995-07-27 | 1997-02-13 | Novokeram Max Wagner Gmbh | Process and device for drying ceramic green bricks |
| CN102410705A (en) * | 2011-11-22 | 2012-04-11 | 北京神雾环境能源科技集团股份有限公司 | Multistage continuous overheated steam drying system and method of low-rank coal |
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| JP2013032879A (en) * | 2011-08-02 | 2013-02-14 | Kawata Mfg Co Ltd | Drying apparatus |
| CN103331836A (en) * | 2013-06-26 | 2013-10-02 | 苏州长发塑胶有限公司 | Hopper drying device |
| CN103423988A (en) * | 2013-08-30 | 2013-12-04 | 武汉工程大学 | Low-energy-consumption lignite drying system and drying process for recycling lignite moisture |
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| WO1997005437A1 (en) * | 1995-07-27 | 1997-02-13 | Novokeram Max Wagner Gmbh | Process and device for drying ceramic green bricks |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105526795A (en) * | 2015-11-30 | 2016-04-27 | 亿和精密工业（苏州）有限公司 | Circulating drying device and cleaning machine comprising same |
| CN105568207A (en) * | 2015-12-29 | 2016-05-11 | 中国石油化工股份有限公司 | Oxidation treatment device for surface of structured packing |
| CN105568207B (en) * | 2015-12-29 | 2018-06-05 | 中国石油化工股份有限公司青岛安全工程研究院 | A kind of structured packing surface oxidation treatment device |
| CN106363177A (en) * | 2016-08-26 | 2017-02-01 | 重庆新钰立金属科技有限公司 | Powder metallurgy drying device |
| CN106363177B (en) * | 2016-08-26 | 2018-03-27 | 重庆新钰立金属科技有限公司 | Powder metallurgy drying device |
| CN106862095A (en) * | 2017-03-08 | 2017-06-20 | 安徽神农光电机械有限公司 | A kind of color selector with new feeding device |
| CN106862095B (en) * | 2017-03-08 | 2020-06-19 | 安徽神农光电机械有限公司 | Look selection machine with novel feedway |
| CN110757718A (en) * | 2019-11-29 | 2020-02-07 | 苏州毫厘文化传媒科技有限公司 | Hopper formula of circulation material loading is moulded plastics and is used desiccator |
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Application publication date: 20140416 |