Scraper for film evaporator and film evaporator
A thin film evaporator and scraper technology, applied in the field of fiber production, can solve the problems of insufficient heat exchange between the material and the heating cylinder wall, and high temperature gradient of the material, and achieve the effects of avoiding the generation of deposits, good heat transfer, and improving evaporation efficiency.
Pending Publication Date: 2022-04-12
上海森永工程设备股份有限公司
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Problems solved by technology
[0004] In the prior art, high-viscosity materials are prone to deposits during the evaporation process, and there are problems such as insufficient heat exchange between the material and the heating cylinder wall, and the temperature gradient of the material is too high.
Method used
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[0046] Exemplary embodiments of the present application are described below with reference to the accompanying drawings. It should be understood that these specific descriptions are only used to teach those skilled in the art how to implement the present application, but are not intended to exhaust all possible ways of the present application, nor are they used to limit the scope of the present application.
[0047] The present application provides a doctor blade 1 for a thin film evaporator and a thin film evaporator 2 .
[0048] see figure 1 , The thin film evaporator 2 includes a rotor 3 and a heating cylinder 4 . The scraper 1 is used to be arranged on the rotor 3, and the material is placed between the rotor 3 and the heating cylinder 4, and the rotation of the rotor 3 will drive the scraper 1 to scrape the material on the inner wall of the heating cylinder 4.
[0049] see figure 1 and image 3 , the rotor 3 may include a cylindrical upper rotor part 31 and a conical ...
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The invention provides a scraper for a film evaporator and the film evaporator. The blade comprises a first blade, and the first blade comprises a first blade root used for being connected to the rotor; the first scraper end part is used for scraping and coating materials; and a first blade folding part which is formed at the first blade root part and is used for being connected to the rotor. The film evaporator provided by the invention comprises the scraper; the rotor comprises a cylindrical rotor upper part and a circular-truncated-cone-shaped or conical rotor lower part, the first scraper is arranged on the rotor upper part, and an included angle is formed between the normal of the rotor upper part and the root of the first scraper at the position of the rotor upper part; and the heating cylinder comprises a cylindrical heating cylinder upper part and a circular truncated cone-shaped or conical heating cylinder lower part. According to the structure of the scraper and the arrangement mode of the scraper, even high-viscosity materials can form a film, good heat transfer is kept, sediment is avoided, and the evaporation efficiency is improved.
Description
technical field [0001] The application relates to the field of fiber production, in particular to a scraper and a thin film evaporator for a thin film evaporator. Background technique [0002] Green and environmentally friendly cellulose fiber is a 100% pure natural material, which is degradable and meets the requirements of green energy saving, environmental protection and sustainable development. It is known as the most valuable product in the history of man-made fibers and has broad development prospects. [0003] The preparation process of the green environmental protection cellulose fiber includes using a thin film evaporator to evaporate the solvent from the mixture of cellulose and solvent. Among them, a material film that can slide downwards can be formed on the wall of the heating cylinder by the scraper. The thin film morphology can facilitate heat transfer and increase evaporation efficiency. [0004] In the prior art, high-viscosity materials are prone to depos...
Claims
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Inventor 王博伟
Owner 上海森永工程设备股份有限公司