Modified emulsified fuel oil and its preparation method

Abstract

Taught is a modified emulsified fuel oil and its preparation method, prepared by mixing the below materials in weight percentage: heavy oil 40-50 wt %; softened water 10-25 wt %; emulsifier 0.1-0.5 wt %; light oil 5-30 wt %; modifier 1-15 wt %; and auxiliary agent 7.5-15 wt %. The heating value of said modified emulsified fuel oil is 8000-13000 kJ/kg. The emulsified fuel oil can be used for high-speed diesel engine trucks and fuel boilers.

1 . A modified emulsified fuel oil, prepared by mixing following materials in following weight percentages:
 heavy oil, 40-50 wt %;   softened water, 10-25 wt %;   emulsifier, 0.1-0.5 wt %;   light oil, 5-30 wt %;   modifier, 1-15 wt %; and   auxiliary agent, 7.5-15 wt %;   wherein   said modified emulsified fuel oil has a heating value of between 8000 and 13000 kJ/kg.   
   
   
       2 . The fuel oil of  claim 1 , wherein said emulsified fuel oil is prepared by the steps of:
 a) heating 40-50 wt % of said heavy oil based on the overall weight of the modified emulsified fuel oil to 80-90° C. in a preheating still;   b) introducing 10-25 wt % of said softened water based on the overall weight of the modified emulsified fuel oil into a reaction still and heating to 80-90° C., then introducing 0.1-0.5 wt % emulsifier based on the overall weight of the modified emulsified fuel oil into the reaction still and mixing;   c) pumping said preheated heavy oil from the preheating still into the reaction still for mixing and emulsifying;   d) introducing 5-30 wt % light oil based on the overall weight of the modified emulsified fuel oil, 1-15 wt % modifier based on the overall weight of the modified emulsified fuel oil, and 7.5-15 wt % auxiliary agent based on the overall weight of the modified emulsified fuel oil into the reaction still;   e) shear mixing contents of the reaction still under the rotating speed of 8000-15000 rpm, preferably 10000-13000 rpm, at a temperature of 50-85° C., preferably 55-75° C., for a time period between 20 minutes and 10 hours, preferably 30 minutes to 5 hours, to obtain a product;   f) feeding the product from step e) into an aging tank to age for a period of between 6 and 100 hours, preferably 24-100 hours, at a temperature of between 45 and 75° C., preferably 50-60° C., to obtain the modified emulsified fuel oil.   
   
   
       3 . The fuel oil of  claim 1 , wherein said heavy oil is one of 180# heavy oil or 250# heavy oil; and the weight percentage of said heavy oil based on the overall weight of said emulsified fuel oil is 42-48 wt %, preferably 45 wt %. 
   
   
       4 . The fuel oil of  claim 1 , wherein said softened water is water having hardness of 7 or below, preferably between 1 and 6, the weight percentage of said softened water is 15-20 wt % based on the overall weight of said emulsified fuel oil, and preferably 18 wt %. 
   
   
       5 . The fuel oil of  claim 1 , wherein said emulsifier is one of TG306 emulsifier and OP emulsifier, and the weight percentage of said emulsifier based on the overall weight of said emulsified fuel oil is between 0.1 and 0.15 wt %, and preferably 0.13 wt %. 
   
   
       6 . The fuel oil of  claim 1 , wherein said light oil is selected from the group consisting of 0# light diesel oil, aviation fuel oil, 200# petroleum solvent, 1# marine fuel oil, and 2# marine fuel oil, and the content of said light oil based on the overall weight of said emulsified fuel oil is between 10 and 25 wt %, and preferably 20 wt %. 
   
   
       7 . The fuel oil of  claim 1 , wherein said modifier is one of 200# petroleum solvent and gasoline, the content of said modifier based on the overall weight of said emulsified fuel oil is between 4 and 10 wt %, and preferably 6 wt %. 
   
   
       8 . The fuel oil of  claim 1 , wherein said auxiliary agent is selected from the group consisting of detergent dispersant, condensing agent, combustion improver, and high energy agent, and is preferably is selected from the group consisting of isooctyl nitrate, isobutyl alcohol, a polyetheramine, diisoamyl oxalate, butylated hydroxytoluene, ethylene glycol monomethyl ether, water in oil emulsifier, polybutylene polyamide, tetraborane, and lithium aluminum hydride; and the content of said auxiliary agent based on the overall weight of said emulsified fuel oil is between 12 and 14 wt %, and preferably 13 wt %. 
   
   
       9 . A method of preparing the fuel oil of  claim 1 , comprising:
 a) heating 40-50 wt % of said heavy oil based on the overall weight of the modified emulsified fuel oil to 80-90° C. in a preheating still;   b) introducing 10-25 wt % of said softened water based on the overall weight of the modified emulsified fuel oil into a reaction still and heating to 80-90° C., then introducing 0.1-0.5 wt % emulsifier based on the overall weight of the modified emulsified fuel oil into the reaction still and mixing;   c) pumping said preheated heavy oil from the preheating still into the reaction still for mixing and emulsifying;   d) introducing 5-30 wt % light oil based on the overall weight of the modified emulsified fuel oil, 1-15 wt % modifier based on the overall weight of the modified emulsified fuel oil, and 7.5-15 wt % auxiliary agent based on the overall weight of the modified emulsified fuel oil into the reaction still;   e) shear mixing contents of the reaction still under the rotating speed of 8000-15000 rpm, preferably 10000-13000 rpm, at a temperature of 50-85° C., preferably 55-75° C., for a time period between 20 minutes and 10 hours, preferably 30 minutes to 5 hours, to obtain a product;   f) feeding the product from step e) into an aging tank to age for a period of between 6 and 100 hours, preferably 24-100 hours, at a temperature of between 45 and 75° C., preferably 50-60° C., to obtain the modified emulsified fuel oil.   
   
   
       10 . A mixture for preparing the emulsified fuel oil of  claim 1 , comprising:
 heavy oil 40-50 wt %;   softened water 10-25 wt %;   emulsifier 0.1-0.5 wt %;   light oil 5-30 wt %;   modifier 1-15 wt %; and   auxiliary agent 7.5-15 wt %.