A scraper type thin film evaporator and its application method

Abstract

A scraper type thin film evaporator and its use method belong to the technical field of heat exchange evaporation equipment. The scraper type thin film evaporator is equipped with a material distribution device, a heating jacket, a scraper mechanism and a supporting shaft seat, the structure is novel, and the vapor-liquid separation is increased. The function of the device optimizes the design of the device. Through the reasonable design of the feeding space, the phenomenon of random flying and splashing when the material enters the evaporator is effectively prevented; the spiral groove is processed on the heating jacket to effectively ensure the heat source required for evaporation. ;The rotor bracket and the rotor are flexibly connected in the scraper mechanism, which effectively avoids the influence of high temperature on the two. The scraper head adopts a combined structure, which is more convenient to install and disassemble, and effectively improves the utilization rate of the scraper thin film evaporator; The support shaft seat effectively solves the problem of rotor installation and adjustment, effectively improves the installation accuracy of the scraper film evaporator, effectively reduces the wear of various components and the inner wall of the evaporator cylinder, and ensures the safe and reliable operation of the evaporator.

Description

technical field [0001] The invention belongs to the technical field of heat exchange evaporation equipment, and relates to an evaporator and its usage method, in particular to a scraper type thin film evaporator and its usage method. Background technique [0002] The scraper type thin film evaporator is a new type of high-efficiency evaporator that is forced to form a film through the high-speed rotation of the scraper. Due to its high thermal conductivity and short flow time of the material in the evaporator, it is not easy to coke and foul, especially suitable for heat-sensitive materials. Evaporation and concentration of high-viscosity materials, so it is widely used in petroleum, chemical, food, medicine, environmental protection and other fields. However, the scraper type thin film evaporator has the following disadvantages during use: 1. The distribution device in the existing evaporator has a single function, and its performance is extensive when used. When the materi...

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Problems solved by technology

However, the scraper type thin film evaporator has the following disadvantages during use: 1. The distribution device in the existing evaporator has a single function, and its performance is extensive when used. When the material enters the evaporator, it often appears the phenomenon of flying and splashing randomly, which affects the use effect; 2 At present, the heating jacket adopts a half pipe wound on the outside of the jacket body, and the half pipe wound on the body is fixed by welding. The welding point is easy to loosen under high temperature conditions for a long time, resulting in the half pipe and the barrel The body contact is not good, this method is simple to make, but the heat conduction efficiency is low, which affects the heat conduction required for evaporation; 3. The connection between the rotor bracket and the rotor in the current scraped film evaporator is fixed by welding. Due to the high temperature of the welding, the rotor bracket and the rotor are deformed, which seriously affects the installation and use of the rotor bracket and the rotor. The scraper head and the inner wall of the evaporator body are constantly rubbed to cause wear, and the scraper head needs to be replaced frequently. It is very difficult to replace, which seriously affects the use efficiency of the scraper type thin film evaporator; 4. The rotor in the thin film evaporator is the core component and has a super long axis. It is installed on the rotor and rotates with the rotor. The distributor and the scraper mechanism are precision components. The deviation during installation should not be too large, otherwise it will affect the efficiency of the equipment, and even damage the equipment in severe cases, resulting in Large loss, because the whole device is installed by multiple parts, in which processing errors and installation errors are inevitable, so when installing the rotor of the distributor and scraper mechanism, the shaft seat supporting the rotor must have a certain adjustment ability, so that the rotor And the distance between the rotating parts assembled on the rotor and the inner wall of the evaporator cylinder is even and reasonable; in summary, in order to better utilize the efficiency of the thin film evaporator, it is particularly important to overcome the above problems

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