Method for producing soap powder by illegal cooking oil

Abstract

The invention discloses a method for producing soap powder by illegal cooking oil. The method comprises the steps as follows: 1) adding water into the illegal cooking oil after impurity removal, stirring for heating, slowly dropwise adding concentrated sulfuric acid, after the reaction is ended, standing for layering, and separating liquid; 2) washing an oil layer by water, and standing for layering; 3) driving into a hydrolysis tower according to the oil-to-water ratio for heating, slightly relieving pressure for exhausting when the pressure is 0.6-0.8 MPa, after the reaction is ended, reducing the pressure to be 0.l MPa, taking out a material, standing for layering, discharging the underlying water to obtain black fatty acid, and carrying out dehydration, distillation and multi-tower distillation to obtain refined mixed fatty acid; 4) adding sodium hydroxide, sodium carbonate, sodium silicate, sodium sulfate, 4A zeolite and carboxymethylcellulose into the refined mixed fatty acid, ageing in an ageing kettle, and conveying into a powder spraying tower through a homogenizing pump and a high pressure pump; and 5) drying into a powder shape through hot air in the powder spraying tower, carrying out settling separation, sieving, lifting into a mixing tank, adding protease, a non-ionic surface active agent and spice, and uniformly mixing. The method has the advantages of simple process, no pollution, low cost and resource conservation.

Description

technical field [0001] The invention relates to a method for producing soap powder, in particular to a method for producing soap powder by using waste oil. Background technique [0002] With the rapid development of social economy, hotels, hotels and other various catering institutions are expanding day by day, the number is increasing rapidly, and the amount of waste water is also increasing. Most oily sewage contains more floating and suspended matter , some even contain a large amount of impurities such as silt and leftover food, and the waste water is directly discharged into the sewer, which not only pollutes the surrounding environment, but also often causes the sewer to be blocked due to the solidification of grease in winter, and the sewage overflows, which not only pollutes the production and living environment , And it also increases unnecessary dredging expenses, the pollutants in its wastewater include chemical oxygen demand COD, BOD, SS animals and plants, and d...

AI Technical Summary

Problems solved by technology

[0004] 1) The acidification process adopts the open flame heating method. The acidification process emits odor and affects the surrounding environment. It is difficult to reuse waste acid water and directly affects groundwater, lakes and other water bodies.

[0005] 2) The hydrolysis process adopts the atmospheric pressure hydrolysis method. During the hydrolysis process, other catalysts need to be added, and the time needs to be more than 20 hours. After hydrolysis, the acid value of black fatty acid is low, resulting in a low yield of crude fatty acid

[0007] 4) The agglomeration method is adopted in the production of soap powder, and the solubility of soap powder is poor

[0008] 5) Refined fatty acids of soap powder raw materials need to be transported and heated, resulting in increased production costs