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Pretreatment device before polyvinyl alcohol dry-process forming

A pretreatment device, polyvinyl alcohol technology, applied in the field of raw material pretreatment and mixing devices, can solve the problems of material temperature rise, achieve the effects of improving efficiency, ensuring accuracy, and reducing sticking and agglomeration

Inactive Publication Date: 2013-02-27
HECHANG GUANGXI CHEM +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

If a high-speed mixer is used in the mixing process, it is easy to cause the temperature of the material to rise continuously, which will degrade PVA

Method used

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  • Pretreatment device before polyvinyl alcohol dry-process forming

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Embodiment

[0020] Such as figure 1 It can be seen that the pretreatment device before the polyvinyl alcohol dry molding includes a screw mixer 2, an auxiliary agent mixing tank 12, a metering device 19, a metering device 20, a spray device 6, a vacuum feeder 3, and a raw material bin 1 , finished product warehouse 8, auxiliary agent barrel 23, auxiliary agent barrel 24. The vacuum feeder 3 is installed above the feeding port of the screw mixer 2; the spray device is composed of a nozzle 5, a pump 10, a solenoid valve 11, and an auxiliary pipe 7, and the nozzle 5 is installed under the upper cover of the screw mixer 2; There is an oil heating interlayer on the wall of the mixing chamber of mixer 2, and there are pneumatic gate valves 4 and 9 at the inlet and outlet, which are sealed by rubber strips when closed; the metering devices 19 and 20 are composed of pump 18, flow rate 21, solenoid valve 14, pipes 15 and 17 composition.

[0021] The PVA raw material is metered from the raw mater...

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Abstract

A pretreatment device before polyvinyl alcohol dry-process forming comprises a polyvinyl alcohol raw material bin, a finished product bin, a vacuum loader, a screw mixer, an auxiliary agent barrel and an auxiliary agent spraying device, wherein the polyvinyl alcohol raw material bin is provided with a vacuum tube connected to the loader, the loader is a vacuum loader and installed at the upper portion of the auxiliary agent spraying device, the screw mixer is arranged under the spraying device, a control valve is arranged at the bottom of the screw mixer, and a control valve outlet is arranged in the finished product bin. A pretreatment auxiliary agent is placed in the auxiliary agent barrel close to the auxiliary agent spraying device, and an outlet tube is installed in the auxiliary agent barrel, connected to an auxiliary agent mixing tank and then connected to the auxiliary agent spraying device through a liquid pump. The pretreatment device can avoid a caking adhesion phenomenon in the polyvinyl alcohol (PVA) pretreatment process well, accelerate the PVA pretreatment speed, simultaneously and greatly save manpower loss and material carrying loss and guarantee the metering accuracy.

Description

technical field [0001] The invention relates to a pretreatment and mixing device for raw materials, in particular to a pretreatment device before dry molding of polyvinyl alcohol. Background technique [0002] Polyvinyl alcohol (referred to as PVA) is the only water-soluble and non-toxic high polymer that has been found so far, and its alias is PVA, Poval. It is a polymer compound developed in the past 30 years. Due to the continuous improvement of synthesis technology and the continuous decline of price, its use is becoming more and more extensive and its development speed is very fast. [0003] Polyvinyl alcohol (PVA) is a water-soluble polymer with a wide range of uses. It is non-toxic and harmless. Protective colloid and other properties, and can be specially treated to make it water-resistant. Its aqueous solution has good film-forming properties, emulsification stability, high transparency, strong adhesion, and good moisture resistance. Its solubility varies with the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29B7/14B29B7/22B29B7/24B29B7/28
Inventor 张鑫曾武何和智李木桂陈生隘李长平
Owner HECHANG GUANGXI CHEM
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