The principle of the evaporator
1, the evaporator is through the heating of the solution concentration or precipitation of crystals from the solution of the equipment. Mainly by the heating chamber and evaporation chamber two parts. Heating chamber to the liquid to provide the heat required for evaporation, prompting the liquid to boil vaporization; evaporation chamber so that the gas-liquid separation of the two phases. Heating chamber with a large number of vapor foam, to the evaporation chamber of the larger space, these liquids through their own cohesion or defoamer, etc. to be able to separate from the vapor.
2, the basic form of the evaporator: mechanical vapor recompression (MVR) from the evaporator out of the secondary steam, compressed by the compressor, pressure, temperature rise, enthalpy increase, and then sent to the evaporator heating chamber as a heating steam to use, so that the material liquid to maintain the boiling state, while the heating steam itself is condensed into water. In this way, the original steam to be discarded has been fully utilized, recovered latent heat, and improve the thermal efficiency, the economy of raw steam is equivalent to the 30 effect of multi-effect evaporation. In order to make the manufacture of the evaporation device as simple as possible and easy to operate, often using a single-effect centrifugal recompressor, can also be a high-pressure fan or turbine compressor. These machines have high volumetric flow rates in the 1:1.2 to 1:2 compression ratio range. For low evaporation rates, piston compressors, slide vane compressors or screw compressors are also used. Evaporation equipment is compact, has a small footprint, requires less space and eliminates the need for a cooling system.
3, heating steam in the heating chamber condenses into water discharge. The solution in the tube is evaporated and concentrated under the heating of the heating steam, and discharged after reaching the requirements. Steam-jet heat pump has the features of simple structure, stable operation and low price. The use of steam injection heat pump, the efficiency is equivalent to increase the effect of an evaporator. Falling-film evaporator in the falling-film evaporator, the liquid and steam flow downstream. The material liquid is preheated to boiling temperature by the preheater, and forms a uniform liquid film into the heating tube by the liquid distribution device at the top, and partially evaporates in the tube. The secondary vapor and concentrated liquid in the tube and flow down. The residence time of material liquid in the evaporator is short, which can adapt to the evaporation of heat-sensitive solution.
4. The separated liquid flows back to the evaporator through the circulating tube and enters the heater to be heated and evaporated under the action of thermosiphon. This forms a closed loop. The greater the temperature difference between the heater and the separator, the more vapor bubbles produced. This can strengthen the role of heat siphon and increase the flow rate, so as to obtain better heat transfer effect. Natural circulation evaporator does not need circulating pump, low running cost.
Evaporator manufacturer recommended
Shijiazhuang Zesheng Chemical Equipment Co.
Shijiazhuang Zesheng Chemical Equipment Co., Ltd. is a chemical unit operation as the core of the modern high-tech companies, the company is mainly engaged in evaporation, crystallization, drying, and other unit operation of the process of research and development, design, as well as the supply of complete sets of equipment to provide customers with consulting, design, procurement, The company is mainly engaged in process research and development, design and supply of complete sets of equipments for evaporation, design, procurement, installation and commissioning, and its products are widely used in the industries of chemical industry, pharmaceutical industry, feedstuff industry, chemical fertilizer industry, dyestuff industry and foodstuff industry, etc. After many years of experience in the engineering field, the company has become a first-class supplier and general contractor of chemical unit operation technology and equipment in China.
Shanghai Dingtai Evaporator Co. Shanghai is the first big city in China. Is the national economy, finance, trade, shipping center. Shanghai has China's largest foreign trade port, the largest industrial base. Nowadays, Shanghai has developed into an international metropolis that shines all over the world, and is committed to building into an international financial center and shipping center in 2023. Shanghai Dingtai Evaporator Co., Ltd. is a global company specializing in the production of all kinds of evaporators. It is mainly engaged in technology development, manufacture, sales and service of evaporators. Has more than 40 years of industry experience. It is one of the largest specialized evaporator production bases in China. Leading in sales volume for 16 consecutive years.
Well, on the working principle of the evaporator and manufacturers have been introduced to everyone, although we usually live and work in the evaporator is not much contact, but it is necessary to do some understanding. Now a lot of refrigeration equipment have evaporator, like we often use the air conditioning. In addition to the evaporator there are many products and equipment we have never met, but we should also slowly to understand them, only then we can better use them.