Method for manufacturing thin-layer multi-turn-surface evaporator

A manufacturing method and evaporator technology, applied in chemical instruments and methods, evaporator accessories, evaporation, etc., can solve the problems of long evaporation time, high heat consumption, affecting product quality, etc.

Inactive Publication Date: 2016-08-24
JIANGNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The main problem of this process is that due to the small unit heat transfer area and unit evaporation area, it leads to large stirring power and high heat consumption; due to the small evaporation area and long evaporation time, it is prone to oxidation reaction, molecular chain scission reaction or condensation reaction. And heat-sensitive biological materials, etc., often seriously affect product quality; in addition, intermittent operations are also difficult to meet the requirements of large-scale continuous production and stable control

Method used

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  • Method for manufacturing thin-layer multi-turn-surface evaporator
  • Method for manufacturing thin-layer multi-turn-surface evaporator
  • Method for manufacturing thin-layer multi-turn-surface evaporator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Conical evaporator made of stainless steel, the angle between the evaporation surface and the horizontal direction is 15°, the distance between the lower end of the cone and the inner wall of the evaporator is 15mm, and 4 fixed holes are set between the lower end of the cone and the inner wall of the evaporator along the perimeter direction. support frame. The conical evaporating surface is provided with 8 air-rising pipes along the perimeter direction, the diameter of the air-rising pipes is φ100mm, and the upper end of the air-rising pipes is 40mm higher than the conical evaporating surface. The evaporation layer of the evaporator is 10 layers. The vacuum evaporation operation method is adopted, the vacuum degree is 80Kpa, the heating temperature is 95° C. with water vapor, and a small amount of nitrogen is added as the carrying gas. From the top of the evaporator, continuously add the liquid with a water content of 4.5% from the solar silicon chip cutting waste liqu...

Embodiment 2

[0022] Conical evaporator made of stainless steel, the angle between the evaporation surface and the horizontal direction is 30°, the distance between the lower end of the cone and the inner wall of the evaporator is 15mm, and 4 fixed holes are set between the lower end of the cone and the inner wall of the evaporator along the perimeter direction. support frame. The conical evaporating surface is provided with 8 air-rising pipes along the perimeter direction, the diameter of the air-rising pipes is φ100mm, and the upper end of the air-rising pipes is 40mm higher than the conical evaporating surface. The evaporation layer of the evaporator is 10 layers. The vacuum evaporation operation method is adopted, the vacuum degree is 80Kpa, the heating temperature is 95° C. with water vapor, and a small amount of nitrogen is added as the carrying gas. From the top of the evaporator, continuously add the liquid with a water content of 4.5% from the solar silicon chip cutting waste liqu...

Embodiment 3

[0024] Conical evaporator made of stainless steel, the angle between the evaporation surface and the horizontal direction is 30°, the distance between the lower end of the cone and the inner wall of the evaporator is 15mm, and 4 fixed holes are set between the lower end of the cone and the inner wall of the evaporator along the perimeter direction. support frame. The conical evaporating surface is provided with 8 air-rising pipes along the perimeter direction, the diameter of the air-rising pipes is φ100mm, and the upper end of the air-rising pipes is 40mm higher than the conical evaporating surface. The evaporation layer of the evaporator is 10 layers. Using the vacuum evaporation operation mode, the vacuum degree is 60Kpa, heated with water vapor, the heating temperature is 95°C, the air in the evaporator is first replaced with nitrogen to an oxygen content of less than 2%, and a small amount of nitrogen is added as a carrying gas. The vitamin C aqueous solution with a wate...

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Abstract

The invention relates to a method for manufacturing a thin-layer multi-turn-surface evaporator. According to the method, conical evaporation surfaces are adopted, materials are uniformly distributed on the upper conical evaporation surface, and liquid flows downwards along the conical surface under the action of gravity, turns to enter the lower conical evaporation surface when flowing to the position close to the inner wall surface of the evaporator, flows downwards along the conical surface under the action of gravity, and turns to enter the next set of evaporation surfaces after flowing to a center distribution pipe and being gathered and redistributed; the process is repeated in this way till concentrated liquid at the kettle bottom is drained.

Description

technical field [0001] The invention belongs to the fields of separation process, environmental protection and the like. The invention adopts a cone-shaped evaporation surface, and the material flows down along the cone surface under the action of gravity to form a thin layer of liquid film, and the volatile components in the liquid are heated by heating the liquid film and in a vacuum or normal pressure heating state. evaporation. After repeated surface evaporation, a concentrated liquid material with very low volatile components is obtained. Background technique [0002] The liquids treated by the present invention are high-viscosity liquids, high-solid-content suspensions, high-salt-containing solutions, and high-concentration liquids, etc. It is necessary to remove most of the volatile components such as water and solvents in the liquids. Currently, the commonly used process is vacuum still distillation. method and thin film evaporation method. Thin film evaporation m...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D1/22B01D1/30
Inventor 孙余凭白云翔
Owner JIANGNAN UNIV
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