Continuous constant-temperature fast nutrient extraction device and extraction method for coated controlled release fertilizer

Abstract

The invention discloses a constant-temperature rapid nutrient extraction device and an extraction method for continuous film-coated slow-controlled release fertilizers. The extraction device comprises a constant-temperature water tank, an electric heater, an extraction cup, an extraction cup cover, and an extraction mesh bag. etc., above the water surface in the constant temperature water tank, the extraction cup fixing plate is fixedly installed, and the extraction cup fixing plate has an extraction cup hole, and the extraction cup is fixed through the fixing plate, and the extraction cup cover is connected to the extraction cup through a hook. Lift the net bag, after the extraction liquid reaches the set temperature, put the extraction bag containing the fertilizer into the extraction cup, seal the extraction cup through the stainless steel cover with silicone pad, and extract the stainless steel sample from the mesh bag when sampling Take it out and put it back into the extraction cup that has reached the set temperature, saving the process of reheating the extraction liquid. The invention solves the technical problem of rapid leaching of the release rate of controlled-release fertilizers at high water temperatures in industrial production, and is suitable for rapid measurement of nutrient release rates and on-line quality detection of slow-controlled release fertilizer manufacturers.

Description

technical field [0001] The invention relates to the field of measuring the nutrient release rate of slow and controlled release fertilizers, in particular to a constant temperature rapid nutrient extraction device and extraction method for coated slow and controlled release fertilizers. Background technique [0002] The coated slow and controlled release fertilizer can regulate the release rate and time of nutrients, realize the consistency of nutrient release and crop nutrient absorption, and significantly improve the utilization rate of fertilizer nutrients. The nutrient release characteristics of coated slow-release fertilizer are the key to judge its quality. At present, major controlled-release fertilizer manufacturers in China, the United States, Japan, and Europe use water as the extraction agent to measure the nutrient release rate of coated slow-release fertilizers under constant temperature conditions. The international controlled-release fertilizer standard passe...

AI Technical Summary

Problems solved by technology

This device can quickly and constant temperature extract the nutrient release of large batches of slow and controlled release fertilizers under constant temperature conditions at any temperature between room temperature and 100°C. It solves the cumbersome online detection of nutrient release in industrial production and improves the temperature conditions. The lower water solution boils, the high-temperature extract is easy to spray out from the sampling port when sampling, and the time-consuming problem of reheating the extract

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