Continuous multiple surfaces two-phase structure constant temperature vacuum dewatering process and device and applications thereof

Abstract

The invention provides a continuous multi-surface two-phase structure constant temperature vacuum dehydration method, a device and an application thereof, the interior of the device forms a multi-surface constant temperature vacuum dehydration environment, the dehydration material liquid is sprinkled to the dehydration environment by cutting a sprinkler head, so as to enter the sprinkling state from top to bottom and constitute a 'liquid-gas' two-phase structure with a very large surface area; the water molecules in the liquid phase enter in the gas phase, the dehydration environment is constantly extracted by a vacuum system so as to achieve the dehydration; a control system controls the internal heating power, the power of a vacuum pump and the opening and closing of a feed valve, a circulating valve and a discharge valve and realizes the continuous stable dehydration according to the parameter values of liquid level, temperature, vacuum degree and water content, etc., which are detected by a sensor. The device overcomes the shortcomings of poor heat transfer and mass transfer effect, high energy consumption, intermittent operation, low efficiency and wide distribution of the water content indicators in the different batches and poor stability of the traditional dehydration device, thus realizing the energy-saving, high efficient, continuous and highly stable dehydration process.

Description

technical field [0001] The invention relates to a continuous dehydration technology for chemical production, in particular to a continuous multi-surface two-phase structure constant temperature vacuum dehydration method and its device and application. Background technique [0002] In many chemical processes, it is necessary to strictly control the water content of raw materials, semi-finished products or finished products, especially in chemical processes that are easy to absorb water and sensitive to water, the quality of the finished product is directly affected by whether the water content is qualified or not. Moreover, in continuous production, a high standard and narrow distribution of water content is a necessary condition to ensure the output of high-quality products. However, for raw materials, semi-finished products, and finished products that are liquid at the temperature of the dehydration process, the traditional dehydration method uses an outer jacket heating an...

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Problems solved by technology

However, for raw materials, semi-finished products, and finished products that are liquid at the temperature of the dehydration process, the traditional dehydration method uses an outer jacket heating and an inner stirring vacuum dehydration tank. The heat transfer and mass transfer effects of this traditional dehydration device Poor, high energy consumption, intermittent operation, low efficiency, wide distribution of water content between different batches, poor stability; there are also continuous dehydration methods such as distillation, fractional distillation, "spray-gas explosion" and molecular membrane, but these The method also has limitations such as low efficiency, poor stability, or expensive equipment

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