Deep dehydrating method and device for oil product

Abstract

The invention relates to a deep dehydrating method and device for an oil product. The deep dehydrating method for the oil product comprises the steps of firstly, enabling the oil product with trace water to pass through a rectifier to ensure that a fluid is uniform; secondly, realizing the capture, agglomeration and growth of trace water drops and demulsification and separation of a trace water-in-oil emulsion through one or more segments of X-shaped oleophylic / lyophobic and hydrophilic / oleophobic fiber braid layers; next, realizing the rapid agglomeration, growth and separation of the water drops through microwave-forced settlement separation; finally, realizing the capture and separation of the extremely trace water drops in the oil product through one segment of omega-shaped oleophylic / lyophobic and hydrophilic / oleophobic fiber braid layer, thereby realizing the deep dehydration of the oil product. The invention also provides a set of device for realizing the method. The device comprises a shell, a feeding pipe, a rectifier, a fiber agglomeration layer, a microwave forced separation layer, a liquid level meter and other parts. The method is high in separation efficiency, low in energy consumption and long in continuous operation period, and can be widely applied to the deep dehydrating processes of all oil products with trace water.

Description

technical field [0001] The invention belongs to the field of petrochemical oil dehydration, and in particular relates to a method and device for deep dehydration of oil. Background technique [0002] Water content in oil has a major impact on the safe use of petrochemical production equipment and subsequent refined oil in engines. For example, water content in crude oil will increase the transportation volume, and more importantly, it will bring difficulties to crude oil processing, increasing atmospheric and vacuum distillation. The energy consumption of the device. Because the relative molecular energy of water is much smaller than that of oil, the volume increases sharply after gasification, which increases the pressure drop of the system and the power consumption increases accordingly. Therefore, if the water content in the oil is high, the operation of the device will fluctuate, causing Punch tower. Moreover, the inorganic salts (Call2, MgCl2) brought in by water will...

AI Technical Summary

Problems solved by technology

For gravity sedimentation, it can mainly remove clear water in oil products, that is, free water droplets with a particle size greater than 100 μm, and can not effectively separate and remove dispersed water droplets below 100 μm; cyclone separation technology is suitable for rapid removal of large amounts of water. Water droplets below 15 μm and emulsified water droplets cannot be effectively separated, because the potential energy needs to be converted into rotational kinetic energy for separation, and the energy consumption is relatively high; coalescing filtration is separated by permeability, and the scope of application is narrow, and there is a short service life in the factory application process However, the use of salt adsorption, electric field separation, and flash separation is relatively energy-consuming and complex in operation, and is only suitable for specific treatment media

[0004] The patent ZL01823742.8 oil dehydrator discloses a method of dehydrating oil by using a membrane, but there are problems of high cost of use and easy pollution and damage; the patent application number 200810042145.2 discloses a method and device for dehydrating diesel oil. The cyclone method is used for separation. Due to the technical characteristics of cyclone separation, it is only suitable for the separation of free water droplets above 15 μm, and the operating pressure drop is large, which cannot achieve deep dehydration of oil products with high efficiency and low consumption; patent ZL201010145423.4 A heavy oil and coal tar dehydrator is disclosed, which uses drum evaporation for dehydration, which has relatively high energy consumption and complicated operation, and is only suitable for the oil dehydration process of specific media. ZL200910065725.8 discloses a dehydration method using electric field and devices, patent 201010261697.X discloses a method and device for dehydration using ultrasonic technology, and patent application number 201310352748.3 discloses a method for dehydrating heavy dirty oil using the method of filtration-swirl-coalescence-swirl , the above patented technologies are only applicable to specific occasions, and all have the problems of high energy consumption and narrow application range, and cannot meet the requirements of deep dehydration of oil products

Images