Patent RU-2698803-C1 (RU)
Title: Technology of destruction of stable water-oil emulsions by ultrasonic method
Inventor: TRETYAKOV OLEG VLADIMIROVICH
IPC: B01D17/06
Filed: 2018-12-28
Granted: 2019-08-30
Abstract: FIELD: technological processes. 
     SUBSTANCE: technologies are proposed for destruction of stable water-oil emulsions by ultrasonic method, where emulsion (WOE) is heated, reagent-demulsifier and water are introduced and depending on the emulsions varying during the process of breaking down the size of the predominant quantity of water drops, the frequency and specific acoustic power of the ultrasonic action are gradually changed as the water drops are enlarged. Prior to feeding into vessel heated WOE with predominant amount of water drops with size in range of 10–80 mcm, activated water is introduced into it, on which is previously exposed to ultrasonic generators with frequencies of emitted waves of 18, 22 and 44 kHz, wherein in the stationary container, the water droplets contained in WOE, with size of 10 mcm at ultrasonic exposure frequency of 50–44 kHz, specific acoustic power 20–30 W/dm 3  and intensity of not more than 3 W/cm 2 ; wherein before feeding into the next settling tank, activated fresh water and reagent-demulsifier are repeatedly fed, followed by flow-through treatment of water-oil emulsion, at this stage, enlargement of water droplets with size of 30 mcm at optimum frequency of ultrasonic action of 32–22 kHz and specific acoustic power of about 30–50 W/dm 3 , after which already in the settling tank, the water drops are coarsened WOE with size of 60 mcm and more at optimum frequency of ultrasonic action of 18–12 kHz, specific acoustic power 50–100 W/dm 3 ; wherein if initial WOE prevailing are water droplets with size of less than 20 mcm, then after adding reagent-demulsifier, heating WOE and mixing with water, activated by ultrasonic action with frequencies of 18, 22 and 44 kHz, performing further initial ultrasonic exposure on WOE at ultrasonic exposure frequency of 50–44 kHz, specific acoustic power of 20–30 W/dm 3 , further, a reagent-demulsifier and activated water are repeatedly introduced into the stream of partially dehydrated material and then flow-through treatment of water-oil emulsion mixed with activated water is performed, at frequency of ultrasonic action 32–22 kHz, specific acoustic power 30–50 W/dm 3 , followed by in-plant treatment of partially dehydrated WOE with ultrasonic frequency of 18–12 kHz and specific acoustic power of 50–100 W/dm 3 ; wherein during initial processing WOE with predominant composition of water drops with size of 30–40 mcm process from above described differs by reduction of number of required steps of ultrasonic action, where after introduction into flow of water-oil emulsion demulsifier and activated water WOE in reservoir is first sounded by ultrasonic action with frequency of 32–22 kHz, specific acoustic power 30–50 W/dm 3 , after which partially dehydrated WOE mixed with reagent-demulsifier and activated water, after their mixing is flow-through treatment WOE with ultrasonic exposure frequency of 18–12 kHz and specific acoustic power of 50–100 W/dm 3 , performing final dehydration process only due to gravity settling; when processing initial WOE with predominant composition of water drops with size of 60–80 mcm process is characterized by reduced number of required steps of ultrasonic action, where after input into flow WOE demulsifier and activated water in vessel flow is sounded by ultrasonic action with frequency of 18–22 kHz, specific acoustic power of 50–100 W/dm 3 , after which dehydrated raw materials are mixed with reagent-demulsifier and/or activated water and after final dehydration process is performed due to gravity settling. 
     EFFECT: high efficiency of the process of destroying an oil-water emulsion. 
     1 cl, 1 dwg, 1 tbl