Method of preparing organic fertilizer and making paper from beanstalk fiber

Abstract

A method of preparing an organic fertilizer and making paper from beanstalk fibers. The invention aims to produce an environment-friendly multifunctional sand-fixing and soil-retaining organic fertilizer with co-production of paper, wherein no pollutant is discharged during the production process. The method includes following steps: (1) cutting beanstalk into short sections and putting the short beanstalk sections in a steam-boiling reaction pot; (2) mixing ammonium bicarbonate, potassium acetate and calcium oxide according to proportions and adding the mixture into a liquid storage pot; (3) adding hot water at about 80 DEG C with stirring for about 45 min and adding the stirred mixture into the steam-boiling reaction pot to mix the mixture with the steam-boiling reaction pot; (4) feeding steam, performing a steam-boiling reaction under a high-temperature and high-pressure condition for about 2.5 h to obtain a brown slurry mixture; (5) with a triple-way pulp extruding machine, performing a filter-pressing process to separate the brown slurry mixture to obtain paper pulp and a black liquid, wherein the paper pulp is used for blanching and papermaking and the black liquid is used for prepared the organic fertilizer through solidification; (6) during the solidification for preparing the organic fertilizer, concentrating the black liquid into a concentrated black liquid through an external-flow free falling film plate-type evaporator; and (7) feeding the concentrated black liquid into a spray drying column to dry and solidify the concentrated black liquid into powder.

Description

technical field [0001] The invention relates to a method for producing organic fertilizer, in particular to a method for producing environmentally friendly multifunctional sand-fixing and soil-conserving organic fertilizer by using crop plant fibers as raw materials and co-producing papermaking. Background technique [0002] Plant sand-fixation and vegetation protection technology is currently a more effective sand control technology at home and abroad, but plant sand-fixation needs water on the one hand, and quicksand needs to be fixed on the other hand, otherwise it is easy to be blown away by the wind, and it is difficult for plants to germinate and survive. Therefore, plant sand-fixation needs to be combined with chemical sand-fixation. Combine. The current chemical sand fixation is mainly by spraying chemical cementing substances on the moving sand to form a protective shell with a certain strength on the surface of the sand, which isolates the direct effect of the air ...

AI Technical Summary

Problems solved by technology

Chemical sand fixation has fast results and is mainly used in important areas such as airports, railways, and highways; emulsified asphalt or emulsified crude oil, synthetic resins, organic latex, inorganic latex, high molecular polymers, etc. are usually used, but these materials generally have high costs. , shortage of raw materials, not easy to degrade, especially difficult to combine with plant sand fixation measures, etc.