Concentration constant control method for water-soluble fertilizers

Abstract

The invention relates to the technical field of water-soluble fertilizers, in particular to constant-concentration fertilization equipment for water-soluble fertilizers and a constant-concentration control method thereof. It includes a mixing tank and a water pump. The output end of the mixing tank is connected to a booster pump. The output end of the booster pump is connected to a two-position three-way valve through a filter. The water pump is connected to an output port of the two-position three-way valve. The other output port of the through valve is connected to the inner cavity of the stirring tank through the return pipe; the concentration sensor in the tank is set on the stirring tank, and the concentration sensor outside the tank is set at the input port of the two-position three-way valve, the concentration sensor inside the tank and the concentration sensor outside the tank The signal output end of the controller is connected to the signal acquisition end of the controller, and the control end of the controller is connected to the two-position three-way valve. It has high stirring efficiency, uniform concentration distribution in the tank, and good fertilizer concentration stability during irrigation, which is conducive to realizing precise fertilization and avoiding waste of fertilizer and water and the resulting environmental pollution.

Description

technical field [0001] The invention relates to the technical field of water-soluble fertilizers, in particular to a constant concentration control method for water-soluble fertilizers. Background technique [0002] Water-soluble fertilizers refer to compound fertilizers containing nitrogen, phosphorus, potassium, humic acid, and trace elements that can be completely dissolved in water. From the form, there are two kinds of solid particle water-soluble fertilizer and liquid water-soluble fertilizer. In terms of nutrient content, there are macroelement water-soluble fertilizers, microelement water-soluble fertilizers, and functional water-soluble fertilizers. As a new type of fertilizer, water-soluble fertilizer has a very flexible application method, which can be used for soil irrigation or foliar spraying, as well as drip irrigation and soilless cultivation. But no matter what kind of fertilization method, in order to achieve the best effect, its concentration is very hig...

AI Technical Summary

Problems solved by technology

Existing water-soluble fertilizer fertilization equipment simply mixes water-soluble fertilizer and water to output, and it is difficult to accurately control its concentration ratio

It not only causes waste of fertilizers, but also easily affects the performance of fertilizers and causes environmental pollution.

Some fertilization equipment with a concentration detection device can only detect the concentration in the mixing tank. When the tank is large, there will be different readings at different detection positions, and the error is large.

In addition, in actual fertilization operations, water-soluble fertilizers are often deployed at the same time as irrigation and fertilization. The hysteresis of concentration detection also affects the constant concentration of water-soluble fertilizers, resulting in high and low concentrations, which affects precise fertilization.

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