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

A vacuum dehydration and multi-surface technology, applied in vacuum distillation, separation methods, chemical instruments and methods, etc., can solve the problems of poor heat transfer, mass transfer effect, wide water content distribution, expensive equipment cost, etc., and achieve good heating effect , large heating surface, and the effect of reducing energy consumption

Inactive Publication Date: 2008-08-27
GUANGZHOU SCUT BESTRY TECHNOLOGY CO LTD
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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,

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

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Effect test

Embodiment 1

[0029] As shown in Figure 1, this continuous multi-surface two-phase structure constant temperature vacuum dehydration device includes a heat preservation tank 2, a vacuum system, a circulation pump 11, and a control system 12. The heat preservation tank 2 is provided with an internal heating tube bundle 3 and a cutting spray head 4 , the cutting sprinkler head 4 is located above the inner heating tube bundle 3; the cutting sprinkler head 4 is connected with the feed control valve 5 of the heat preservation tank 2, and the circulation control valve 8 of the outlet bypass of the circulation pump 11; the inlet of the circulation pump 11 is connected with the insulation The bottom of the tank 2 is connected, and the outlet of the circulation pump 11 is provided with a discharge control valve 10; the vacuum system is connected with the vacuum port 6 on the top of the insulation tank 2; the control system 12 is connected with the feed control valve 5, the circulation control valve 8,...

Embodiment 2

[0035] In the prepolymer synthesis process of cast polyurethane (CPU), the water content index of the raw material oligomer polyol is required to be less than 5 / 10,000, and the lower the water content index, the narrower the distribution, the more conducive to the synthesis of high quality prepolymer. Using the above-mentioned continuous multi-surface two-phase structure constant temperature vacuum dehydration device as shown in Figure 1 to carry out continuous multi-surface two-phase structure constant temperature vacuum dehydration of oligomer polyols, including the following steps:

[0036] (1) Circulate the heat medium into the inner cavity of the inner heating tube bundle or start the electromagnetic heater, and quickly raise the temperature of the closed multi-surface constant temperature material cavity formed by the inner surface of the insulation tank and the outer surface of the inner heating tube bundle to 110±2°C;

[0037] (2) Start the vacuum system to take away t...

Embodiment 3

[0042] In the crude oil industry, after the first separation of free water in the high-water content crude oil produced by sedimentation and separation equipment, if the water content is still higher than 10%, the electric dehydration equipment is directly used to break the emulsion and dehydrate, which is easy to short circuit and damage the electrodes. At this time, the above-mentioned continuous multi-surface two-phase structure constant temperature vacuum dehydration device as shown in Figure 1 can be used to perform continuous multi-surface two-phase structure constant temperature vacuum dehydration on the semi-finished product "medium water content crude oil" after the initial separation of sedimentation, including the following step:

[0043] (1) Circulate the heat medium into the inner cavity of the inner heating tube bundle or start the electromagnetic heater, and quickly raise the temperature of the closed multi-surface constant temperature material cavity formed by t...

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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...

Claims

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Application Information

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IPC IPC(8): B01D3/10B01D1/22
Inventor 洪河谋李俊邹明清王增昌
Owner GUANGZHOU SCUT BESTRY TECHNOLOGY CO LTD
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