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Pre-clearing raw oil,Transesterification process,Recovery of the methanol,Washing,drying process,Recovery glycerin and methanol. - details see: https://www.machineto.com/2t-20td-biodiesel-oil-equipment-biodiesel-oil-processing-plant-biodiesel-oil-production-line-10300542

Introduce

The line adopts batch type reacting system,its cost is lower and easily operation.The reaction equipment adopts the low temperature and normal atmosphere.The conversion rate of ester exchange will be higher than 95% if the material like the oil,methanol and the catalyst are put into the reactor in batches and keep boiling in the reactor.

This process is including the following steps.

1.Pre-clearing for the raw materials

It must be alkali refined or pre-esterificated with the methanol if the rate of non-esterified fatty acid in oil is higher than 2%.The catalyst like H2SO4,HCI,P-toluenesulfonic acid,highly acid resin are usually used to process it.We use the H2SO4 for the catalyst,which is cheaper.So that we can reduce the amount of catalyst used and soap contents in the raw glycerol.

2.Transesterification process

It adopts two steps for the reacting,to make the exchanging rate arrive at 95% more.

a.Preheating the oil deacidified and degummed in the reactor for 70 degrees,then separately put catalyst and methanol into the ester exchange reactor.Then mix the mixture in the reactor under the temperature of 70 degree.Mixing time is for 2 hours.

After sinking for more than 2-4hours,the above is rude methyl ester and the bottom of reactor,heavy parts are put out,mainly is the glycerol.

b.The second reacting process

Samely put the catalyst and methanol into the reactor,together mixing and reacting for 2-3hours.And sinks to separate the mixture,get the rude methyl ester to the next water distilling process.

3.Recovery of the methanol

The rude methyl ester go into the distiller vessel and be heated under the vacuum condition,the methanol would become gas and go into the cooler,then become the liquid for flowing into the methanol tank for recycling using.

4.Washing&drying process

After distilling,the methyl ester is pump into the washing tank,add the hot water for mixing and sink for 2-4hours,the bottom is put off.

And the above is pump into the drying vessel,which is distilled to remove out the moisture under the heating and the vacuum condition.This process also recovery the balance methanol.So the final product is biodiesel.

5.Recovery for glycerin and methanol

The reactant stays still in the separator and separates the raw glycerol.The methanol can be evaporated out from the raw glycerol with the methanol evaporator,and then the raw glycerol is refined later on.

The way to recycle the little glycerol in the methyl ester:

At first heat the raw methyl ester to recycle the methanol,and then add water and diluted acid into the raw methyl ester so that the glycerol in the methanol,soap contents in the methyl ester and catalyst can be washed out.After the still delamination,the raw glycerol is then turned into post processing refinery procedure.