PVA extraction device

Abstract

The invention discloses a PVA extraction device, which comprises a rotating cylinder, a tray and a scraping mechanism, a supporting plate is arranged in a suspended mode, a supporting frame is arranged on the right side of the supporting plate, the bottom end of the supporting frame is fixed to the tray, and an internal thread rotating cylinder is arranged in the middle of the supporting frame in a penetrating mode through a bearing in a horizontal rotating state, a pair of guide frames and guide rods are installed at the symmetrical positions of the upper side and the lower side of an outer screw correspondingly, the guide frames are fixed to the supporting frame rightwards, the guide rods are fixed to the supporting plate leftwards, a ratchet wheel is installed on a square edge block through a square wheel center in a corresponding buckled mode, and the clamping tooth part of a clamping head is correspondingly clamped between two adjacent ratchets on the circumferential edge of the ratchet wheel, and a reset spring is further installed between the pressing part of the clamping head and a supporting point on the supporting frame. The purpose of adjusting the distance between the scraping mechanism and the inner cylinder wall of the rotating cylinder can be achieved only through an operation handle, the use limitation of devices in the prior art is broken through, and the practicability of the device is improved.

Description

technical field [0001] The invention relates to the related technical field of PVA extraction, in particular to a PVA extraction device. Background technique [0002] The printing and dyeing industry is an important part of the textile industry, and it is also the main source of wastewater in the textile industry. A large number of pollutants in printing and dyeing wastewater come from the size used in the sizing process, mainly polyvinyl alcohol (PVA) size. PVA has good adhesion, size film toughness and wear resistance, and is low in cost. Widely used in textile sizing process. However, after the weaving process is completed, the size on the gray cloth will affect the water absorption performance of the fabric, and will also affect the processing quality of the dyed and finished products. Therefore, during dyeing and finishing, the coated size on the fabric must be removed for desizing treatment. [0003] see figure 1 , reference numeral 1 indicates a prior art PVA extr...

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Problems solved by technology

[0003] see figure 1 , reference numeral 1 indicates a prior art PVA extracting device, a patent on a PVA extracting device containing PVA wastewater disclosed on the patent network, the authorization number is CN201821964728, and its general structure includes a drum 3, a tray 5 and a scraping mechanism 4, the scraping mechanism 4 is composed of a scraper and two hydrofoils, the scraping mechanism 4 is fixedly installed on the support frame 7 through the hoop 6, and the bottom end of the support frame 7 Fixed on the tray 5, the scraping mechanism 4 is maintained in a fixed and immovable state. Other structures are described in detail in its patent specification, and will not be repeated here. Although this device can realize the extraction of PVA, the device There is a defect, that is, because the scraper mechanism 4 remains fixed throughout the whole process, that is, the distance between the end of the scraper and the inner wall of the drum 3 is a single value, and the distance between the two cannot be changed. When the different sizes of miscellaneous PVA materials need to change the spacing, the PVA extraction device of the prior art cannot do it, and there are limitations in the use of the device, which needs to be improved. The improved scraping mechanism 4 not only needs to be combined with the drum 3 The distance between the inner cylinder walls can be adjusted, and the adjusted scraping mechanism 4 cannot move backward due to the extrusion force of the scraping material and needs stability. The two requirements must be satisfied at the same time. For this reason, the present invention provides An improved PVA extraction device

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