Double helical ribbon multi-layer oar blade scraping cutter type stirrer

Abstract

A double helical ribbon stirrer with multiple layers of blade scrapers comprises a stirring shaft (5), helical ribbons (2), support blades (1), separate blades (4) and a soft scraper (3). The support blades (1) and the separate blades (4) are layered and arranged on the stirring shaft (5), and the support blade and the separate blade of each layer are arranged on the stirring shaft (5) symmetrically, and the support blade (1) and the separate blade (4) keep a dip beta of 10 degrees to 45 degrees with the radical level section, and smaller dip can reduce the loss of useful work effectively. The helical ribbons (2) are connected with the stirring shaft (5) through the support blades (1) which have the functions of connecting ribs and strengthening ribs, thus causing reasonable structure design of the whole stirrer. The soft scraper (3) is divided into two sections which are fixed on the top of the helical ribbons (2) symmetrically, and an angle alpha between the soft scraper (3) and a still wall is 20 degrees to 60 degrees. The soft scraper (3) can scrape sticky material on the stirring still wall in time, thus solving the problem of incomplete mixing on the surface of the still wall and avoiding the damage to the still wall. The stirrer of the invention provides a material system that can adapt to different viscosities, in particular to the material system which has large viscosity variation range in a short time.

Description

technical field [0001] The invention relates to a stirrer, in particular to a double-screw ribbon multi-layer paddle blade scraper type stirrer which can be applied to material systems with different viscosities at the same time, especially suitable for materials with a wide range of viscosity changes in a short period of time. Background technique [0002] Agitators are widely used in petroleum, chemical, food, light industry, pharmaceutical and other industrial fields. Under the action of the agitator, the materials in the gas-liquid, liquid-liquid, liquid-solid and other systems are dispersed and uniformly mixed, which strengthens the mass transfer and heat transfer, and strengthens the chemical reaction process. According to different material characteristics and mixing purposes, the types of agitators used are also different, mainly including: paddle agitator, impeller agitator, anchor and frame agitator, etc. [0003] For the mixing of high-viscosity materials, it is ...

AI Technical Summary

Problems solved by technology

But in these two methods, the stirring effect of the former is not good, and the structure of the latter is more complicated.

In addition, high-viscosity materials are prone to stirring dead zone during the stirring process, and materials are easy to accumulate on the wall of the stirring tank

In order to overcome the above defects, the Chinese patent CN2429251Y designed a plate and frame stirrer for stirring viscous materials. This patent realizes the large circulation flow of the fluid and has better mixing performance, but it does not solve the problem of the material attached to the reactor. side wall problem

Although Chinese patents CN2738875Y and CN2430211Y have solved the problem of material attached to the wall, the structure of the agitator designed by the Chinese patent CN2738875Y is too complicated, and the maintenance and daily maintenance of the agitator are not used, and the equipment investment cost is expensive; and the Chinese patent CN2430211Y is a scraping wall The agitator has a relatively simple structure and is suitable for mixing two-phase materials with a large density difference. However, it is not suitable for mixing high-viscosity materials due to the tie bars between the stirring frame and the scraper.

Images