FIELD: fat and oil industry.
SUBSTANCE: invention relates to fat and oil industry. Method for the separation of tall oil products (soap products) from black liquor comprising a boiling liquid that has been drained off, wherein said boiling liquid is produced in a digester of a sulfate-cellulose plant and comprises a fibrous cellulosic material mixed with said black liquor and tall oil products. Boiling liquid will be brought to a mechanical separator unit which allows the mechanical separation of fibrous cellulose material from a more viscous mixture of black liquor and tall oil products, where a mixture of black liquor is capable of converting into mixed black liquor by adding an intermediate black liquor, and mixture is brought to a separation tank that employs a gravity separation, being adapted for being emptied of the collected and concentrated tall oil products in a discontinuous manner. In this case, tall oil products are collected by flotation in the upper part, are positioned above on a fraction of mixed black liquor and concentration of tall oil products are brought to a centrifugal separator. Tall oil products and the mixed black liquor contained therein are fed to the inlet of said centrifugal separator, wherein said separator is adapted to concentrate the tall oil products by creating centrifugal forces, such that tare present in a solid structure which is too hard to be pumped in a simple manner. Tall oil products and the mixed black liquor after the centrifugal separator have a crude tall oil content of 50 to 70 wt.%, and wherein said solid form is configured to be diluted with water to a state in which it can be pumped, the diluted tall oil products being pumped into a container that serves as a container for homogenization, and said concentrated tall oil products are supplied from the separation vessel to the mixing container before they are pumped to the centrifugal separator by means of a pumping unit. Tall oil product separator comprises a separator configured to mechanically separate the boiling liquid to produce a fibrous material and a mixture of black liquor and tall oil products. Separating tank shall, firstly, be adapted for being emptied in a discontinuous manner of gravity-concentrated tall oil products (soap) gathered therein. There is also an additional centrifugal separator, which is capable of separating and further concentrating tall oil products. Also, the arrangement comprises a mixer made to dilute the solid form with water, as well as a pump for pumping diluted products into a container for homogenization. Also, this comprises a mixing tank configured to receive concentrated products from the separation vessel before they are pumped to a centrifugal separator by means of a pump.
EFFECT: invention allow the simplification of the production of tall oil products.
10 cl, 3 dwg
