Solid-liquid separation device and method for washing lignocellulose solid residue

Abstract

The invention discloses a solid-liquid separation device and a method for washing lignocellulose solid residues. The device comprises a kettle body, a piston, a stirring paddle, a partition plate provided with filter holes, and a filter screen; the axial direction of the kettle body is The direction runs through the hollow to form a cavity, and the partition plate is fitted in the cavity to separate the cavity into two parts, namely the washing cavity and the drainage cavity. The piston and the stirring paddle are fitted in the cleaning cavity. On the side of the partition plate facing the stirring paddle; the kettle body is also provided with a feed inlet, a water inlet, a feed outlet, and a liquid outlet; the feed inlet, the feed outlet and the washing chamber are connected, and the water inlet , The liquid outlet is connected with the drain cavity. By adopting the solid-liquid separation device, not only can the pretreated lignocellulose solid residue be repeatedly washed and solid-liquid separated, but also the material can be transported, the process is simplified, and the lignocellulose pretreatment and enzymatic hydrolysis sections are effectively connected.

Description

technical field [0001] The invention relates to the fields of waste resource utilization and energy saving and emission reduction, in particular to a solid-liquid separation device and a method for washing lignocellulose solid residues. Background technique [0002] Lignocellulose includes resources such as crop straw, forestry production and processing waste, and is mainly composed of cellulose, hemicellulose and lignin. Cellulose and hemicellulose can be converted into monosaccharide platform compounds such as glucose and xylose through enzymatic hydrolysis, and then converted into high value-added biochemical products such as ethanol, lactic acid, citric acid, etc. through biological or chemical catalysis. Lignin can be As a raw material for the preparation of cement superplasticizers, adhesives, adsorbents and other products. However, the compact structure of lignocellulose hinders the efficient enzymatic hydrolysis of cellulose and hemicellulose. Pretreatment helps br...

AI Technical Summary

Problems solved by technology

The existing process usually uses multi-stage screw extrusion to realize repeated washing, solid-liquid separation and material transportation of lignocellulosic solid residues, which requires many procedures and high manufacturing costs

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