Cavitation effect-based crushing device for oil seal nano PVA fiber production

Abstract

The invention discloses a cavitation effect-based crushing device for oil seal nano PVA (polyvinyl alcohol) fiber production, which comprises an equipment box body, a cavity and cavitation cooperative variable-pressure uniform crushing mechanism, a synchronous centrifugal oil seal separation, atomization and drying mechanism and a conveying, freezing and primary crushing mechanism, the cavitation cooperative type variable-pressure uniform crushing mechanism is arranged on the side wall of the vertical shaft in an annular array mode, the synchronous centrifugal oil seal separation atomization drying mechanism is arranged on the side wall of the cavitation cooperative type variable-pressure uniform crushing mechanism, and the conveying freezing primary crushing mechanism is arranged on the upper wall of the equipment box body. The invention belongs to the field of nano material production, and particularly provides a crushing device for oil seal nano PVA fiber production based on the cavitation effect, the cavitation phenomenon and the cavitation effect are applied to efficient and uniform crushing of PVA fibers, and the crushing efficiency of the nano PVA fibers is improved; the multipurpose principle is applied to oil seal treatment and separation drying of the nano PVA fibers, and the production efficiency of the oil seal nano PVA fibers is improved.

Description

technical field [0001] The invention belongs to the field of nano-material production, and specifically refers to a cavitation-based crushing device for producing oil-sealed nano-PVA fibers. Background technique [0002] In the research and development of modified concrete, PVA fiber has good affinity and bridging effect with cement, and has good mechanical properties and durability. It is widely used in concrete with flexible requirements, but the diameter of PVA fibers mixed in concrete is mostly about 30 μm, and the fiber size is relatively large, resulting in a small specific surface area of ​​fibers in concrete, which fails to fully exert the bridging ability of fibers. Moreover, the overall amount of fiber is large, the concrete production process is relatively difficult and the production cost is high, and the nano-PVA fiber treated with oil agent can effectively solve the above problems. [0003] In the prior art, electrospinning is mostly used to produce nanofibers...

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Problems solved by technology

[0002]In the research and development of modified concrete, PVA fiber and cement have good affinity and bridging effect, and have good mechanical properties and durability, which can be used in the bridging process Due to the certain slippage, fiber concrete has the performance of strain hardening and is widely used in concrete with flexibility requirements. However, at present, the diameter of PVA fibers mixed in concrete is mostly about 30 μm, and the fiber size is relatively large, which leads to the loss of fiber in concrete. The specific surface area of ​​concrete is small, the bridging ability of the fiber cannot be fully utilized, and the overall fiber content is large, the concrete production process is more difficult and the production cost is higher, and the nano-PVA fiber after oil treatment can effectively solve the above problems

[0003]In the prior art, electrospinning is mostly used to produce nanofibers from organic polymers, but the nanofibers produced are in a continuous state, and the fiber length is too long , it still needs to be further crushed before it can be used in the modification of concrete. The mechanical crushing method cannot meet the requirements of the nanoscale and the size distribution is relatively dispersed. At present, there is a lack of an integrated device for crushing and sealing oil for the production of nano-PVA fibers. It can realize the uniform classification and crushing of electrospinning nano-PVA fibers, and at the same time, it can simultaneously complete the oil treatment by means of the classification and crushing process and dry and disperse the processed oil-sealed nano-PVA fibers

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