Horizontal MVC evaporator

Abstract

The invention relates to a horizontal MVC evaporator. The horizontal MVC evaporator comprises a cylinder body, a condenser and a raw water inlet, wherein a first-level evaporation chamber, a second-level evaporation chamber and a third-level evaporation chamber are arranged in the cylinder body and are connected in series side by side and are respectively provided with multiple rows of horizontally arranged evaporation pipes. According to the horizontal MVC evaporator, by virtue of a horizontal pipe falling film evaporator, a system is only operated by virtue of an electrically driven vapor compressor, and except the vapor compressor, operation parts of the MVC evaporator are extremely few, so that the operation is simple, the operation energy consumption is low, and high-purity deionized water can be produced with low cost; the horizontal MVC evaporator can be applied to industries of factories, power stations, oil fields and the like which need to consume a large amount of high-purity deionized water; by virtue of the process, a stable, reliable and long-term boiler feed water source can be provided.

Description

technical field [0001] The invention belongs to the technical field of evaporators, in particular to a horizontal MVC evaporator. Background technique [0002] Mechanical vapor recompression (MVC) evaporators are generally divided into three-stage processes: evaporation part, vapor compression part and steam-water separation part. Through investigation, it is also found that some MVC evaporators adopt a three-stage process split type, and some use a three-stage combined type. ; The evaporator, the key equipment in the MVC process, has both a vertical tube falling film evaporator and a horizontal tube falling film evaporator. [0003] The diameter of the heat exchange tube bundle in the vertical tube falling film evaporator is large. In the same shell, the number of heat exchange tube bundles installed is small, the heat exchange area is small, and the energy consumption per ton of water is high; the water distribution in the tube will cause damage to individual water distrib...

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Problems solved by technology

[0003] The diameter of the heat exchange tube bundle in the vertical tube falling film evaporator is large. In the same shell, the number of heat exchange tube bundles installed is small, the heat exchange area is small, and the energy consumption per ton of water is high; the water distribution in the tube, the damage of individual water distributors will It will lead to uneven water distribution, poor heat transfer effect, and even dry burning of the heat exchange tubes in charge; water can only pass through the tube side, and can only indirectly feedback whether there is scaling in the shell through water production, etc., and work at high altitudes to descale in the tube , the heat exchange tube bundle is long, and "chemical cleaning + high-pressure water mechanical cleaning" is required, which makes the operation difficult; on-site installation takes a long time, and daily maintenance requires high-altitude operations

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