Apparatus and method for separating black liquor from saponified product

Abstract

The invention relates to an apparatus and a method for separating a black liquor from a saponified product. The apparatus comprises: a rack; a first support seat, wherein the first support seat and the first end of the rack form a hinged connection; a lifting bracket connected to the second end of the rack or positioned at the outer side of the second end; a screening roller, wherein both ends of the rotation shaft are respectively and rotatably connected to the first support seat and the lifting bracket; a filtration screen attached on the inner ring surface of the screening roller; a diversion baffle connected to the inner ring surface of the screening roller and the filtration screen; and a first collection groove connected to the rack and a second collection groove connected to the rack, wherein the lifting bracket comprises a lifting mechanism, a support platform, a transmission motor connected to the support platform, and a second support seat. The separation process comprises that the transmission motor is started to make the screening roller rotate, a saponified product is continuously added into the material inlet end of the screening roller, the liquid permeating the filtering screen enters the first collection groove, the concentrated saponified product enters the second collection groove, the liquid in the first collection groove is reused, and the saponified product in the second collection groove is sent to the subsequent saponified product processing step so as to be used.

Description

technical field [0001] The invention relates to the technical field of recovery of saponified matter in the alkaline pulping process, in particular to a device and method for separating black liquor from saponified matter. Background technique [0002] In the cork alkali pulping process, the resin acids, fatty acids and unsaponifiable substances released in the form of various saponifiable sodium salts enter the evaporation system after being extracted from black liquor, and their recovery has important economic value. Full recovery is also conducive to the evaporation operation of alkali recovery. In the traditional method of extracting saponified matter, the dilute pulping black liquor is evaporated and concentrated to a certain concentration, and then left to stand in a semi-concentrated black liquor tank, and the saponified matter is extracted after standing and separating in the black liquor tank. Such as CN101392148A discloses a kind of tall oil recovery method, in th...

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Problems solved by technology

[0003] Because the traditional saponification extraction method is greatly affected by the liquid level of the saponification separation tank during the production process, it is difficult to achieve the ideal state for the residence separation time, and the concentration of the saponification separated from the black liquor is not high. Containing a higher concentration of black liquor, the black liquor contained in the saponified product will reduce production efficiency and increase energy consumption and sulfuric acid consumption in the subsequent tall oil production process

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