Chinese medicine residue biomass charcoal-based urea, and preparation method thereof

Abstract

The invention belongs to the technical field of urea, and more specifically relates to a Chinese medicine residue biomass charcoal-based urea, and a preparation method thereof. The preparation method comprises following steps: Chinese medicine residue is subjected to high temperature pyrolyzing so as to obtain Chinese medicine residue biomass charcoal and combustible gas; an urea raw material is mixed with the Chinese medicine residue biomass charcoal, and an obtained mixture is subjected to fusion and pelleting, and an obtained pellet material is collected, wherein the amount of the Chinese medicine residue biomass charcoal accounts for 12 to 16% of the total weight amount of the urea raw material; the pellet material is subjected to negative pressure cooling and screening; the screened pellet material is subjected to membrane coating, packaging, and discharging so as to obtain the Chinese medicine residue biomass charcoal-based urea. The Chinese medicine residue biomass charcoal-based urea is abundant in nutrients; nutritional element release is coordinated, and lasts long; fertilizer nutrient utilization rate is high; the Chinese medicine residue biomass charcoal-based urea is capable of improving and fertilizing soil effectively; fertilizer utilization rate is increased; soil organic content is reduced; soil bulk density is reduced; soil water and nutrient retention capacity is improved; crop growth is promoted; crop yield is increased obviously; crop quality is improved; and economic benefits are excellent.

Description

technical field

[0001] The invention relates to the technical field of urea, in particular to a biomass carbon-based urea of ​​traditional Chinese medicine residue and a preparation method thereof. Background technique

[0002] Fertilization has become one of the indispensable technical measures of agricultural production, contributing more than half of crop production. The utilization rate of fertilizers in China has always been relatively low. For example, the average utilization rate of nitrogen fertilizers for current crops is only about 30%, which is nearly 20 percentage points lower than that of developed countries. This is due to the unscientific fertilization methods on the one hand, and the fertilizer itself on the other hand. characteristics. It is urgent to improve fertilizer utilization efficiency, and research and development of new multifunctional fertilizers is one of the important ways to improve fertilizer utilization efficiency.

[0003] Biochar is a soli...