Method for producing potassium fulvate organic fertilizer by biological enzyme pretreatment and potassium hydroxide alkaline process wheat straw pulping black liquid extraction

Abstract

The invention provides a method for producing a potassium fulvate organic fertilizer by biological enzyme pretreatment and potassium hydroxide alkaline process wheat straw pulping black liquid extraction, and belongs to the field of fertilizer production. The method comprises the three parts of pretreating wheat straw pretreatment black liquid by biological enzymes, extracting potassium hydroxide alkali process wheat straw boiling black liquid, and producing a finished product of the potassium fulvate organic fertilizer, wherein the process of pretreating wheat straw pretreatment black liquid by biological enzymes comprises the steps of wet process material preparation, wheat straw pretreatment by biological enzymes, and storage of black light containing rich potassium fulvic acid; the potassium hydroxide alkaline process wheat straw pulping extraction black liquid comprises extrusion of biological enzyme pretreatment wheat straws, mixing of wheat straws and potassium hydroxide medicine liquid in a pre-soaking machine, steaming ball steaming boiling spray discharging, and steamed and boiled black liquid collection and storage. The organic fertilizer production line comprises black liquid evaporation and concentration, guniting pelleting machine treatment, hot and cold sieving system treatment and organic fertilizer finished product packaging. The paper making black liquid is changed from waste into valuable materials; through biological enzyme pretreatment, the high-activity potassium fulvate organic fertilizer is produced.

Description

technical field [0001] The invention belongs to the extension of the technical field of papermaking and extends to the field of agricultural production of organic fertilizers, and specifically relates to a method of extracting potassium fulvic acid organic fertilizer from black liquor produced in the process of pulping wheat straw with biological enzyme pretreatment + potassium hydroxide alkali method method. Background technique [0002] At present, the cooking of paper mills generally uses the reaction process of chemical dissolution and lignin removal. The general chemical pulping not only needs to use various chemicals, but also has high cost and high energy consumption. If the black pulp produced If the liquid is directly discharged into the sewage treatment plant, the cost of sewage treatment will be greatly increased. [0003] Fertilizer is a direct or indirect supplier of nutrients needed for crop growth, and has the function of improving soil properties and improvi...

AI Technical Summary

Problems solved by technology

"Method of Producing Fertilizer Using Potassium Hydroxide Alkaline Papermaking Black Liquor" (patent application number: 03122742.2), although it talks about the use of potassium hydroxide alkali method to produce fertilizers from papermaking pulping black liquor, but the mentioned raw materials and preparation The process is too broad, not specific and clear, and it is difficult to implement it in actual operation

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