On-line three-phase flow evaporation concentration device with solid particle for preventing liquid on wall

Abstract

An in-line three-phase tream evaporation concentrator able to effectively prevent surface sticking features that a kind of physiological inertial solid particles are added to vapor-liquid stream evaporation concentrator to form a naturally circulating three-phase fluidized bed, where the said solid particles can prevent the surface sticking phenomenon. The said concentrator has heater, heating pipe, separation chamber, vapor and condenser, condensed liquid tank, vacuum buffer tank, vacuumizing pump, and discharger.

Description

technical field [0001] The invention relates to an evaporation concentration technology, in particular to an online high-efficiency anti-wall hanging three-phase flow evaporation concentration device. Background technique [0002] Evaporation and concentration operation is an indispensable unit operation in traditional Chinese medicine pharmaceutical, dairy industry, tea (or beverage) industry, food and other fields under the current technical conditions. A link that is difficult to maintain stability. Especially in the process of traditional Chinese medicine, the common problem in this operation unit at present is that the leaching solution to be concentrated has different degrees of fouling on the wall surface of the heating tube of the evaporation concentrator, which is also called wall hanging phenomenon. The occurrence of the wall-hanging phenomenon will bring the following problems: (1) It will reduce the heat transfer rate of the evaporator ...

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Problems solved by technology

Especially in the process of traditional Chinese medicine, the current common problem in this operation unit is that the leaching solution to be concentrated has different degrees of fouling on the wall of the heating tube of the evaporation concentrator, also known as wall hanging phenomenon.

The occurrence of the wall-hanging phenomenon will bring the following problems: (1) It will reduce the heat transfer rate of the evaporator concentrator, reduce the evaporation capacity, and even cause local overheating, which will affect the efficacy and product quality stability of some Chinese medicine varieties. (2) In the current mass production situation, in order to eliminate wall hanging, the time and frequency of tank cleaning have to be increased to increase the consumption of steam, water and caustic soda solution, resulting in an increase in working hours, material consumption and energy consumption, resulting in increased productivity Reduce and aggravate environmental pollution, and it is also difficult to meet the needs of large-scale and continuous production of traditional Chinese medicine in the future

The existence of the pump has many disadvantages: ① increases the energy consumption of the device system; ② causes a large degree of wear of solid particles; ③ due to the impact of the fluid affected by the pump, it is also very unfavorable for the growth of crystals in the evaporated solution. The number of crystals produced is large and the particle size is small, so that the final separation of the crystals is more difficult, and the morphology of the crystals is also damaged to a certain extent; ④The existence of the pump makes the device system complicated. In some occasions, it is necessary to use the pump for forced circulation. inconvenient, unnecessary or impossible

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