Triple-effect evaporator for preparing organic liquid fertilizer

Abstract

The invention relates to the technical field of evaporation equipment. The invention particularly discloses a triple-effect evaporator for preparing organic liquid fertilizer. The triple-effect evaporator comprises a first-stage evaporator, a second-stage evaporator and a third-stage evaporator, a tail mixer is arranged at a liquid outlet of the third-stage evaporator, the tail mixer comprises a heat preservation tank, a water inlet is formed in the top of the heat preservation tank, a water outlet is formed in the bottom of the heat preservation tank, a strain box is fixed in the heat preservation tank, a liquid inlet pipe is also fixed on the heat preservation tank, the top of a liquid inlet pipe penetrates through the top of the heat preservation tank to be connected with the liquid outlet of the third-stage evaporator, the bottom of the liquid inlet pipe penetrates through the strain box and the bottom of the heat preservation tank to be connected with a liquid storage tank, a necking section located in the strain box is arranged on the liquid inlet pipe, a feeding hole is formed in the necking section, and a feeding one-way valve is arranged in the feeding hole. By adopting the technical scheme of the patent, the strains can be fully mixed with the concentrated solution under the condition of activation.

Description

technical field [0001] The invention relates to the technical field of evaporation equipment, in particular to a three-effect evaporator for preparing organic liquid fertilizer. Background technique [0002] Organic fertilizers refer to fertilizers made from by-product resources rich in organic matter such as animal excrement or animal and plant residues as the main raw materials, which are fermented and decomposed. Organic fertilizer has the characteristics of improving soil, fertilizing soil, increasing soil nutrient activity, purifying soil ecological environment, ensuring high-quality, high-yield and high-efficiency vegetables, and is an irreplaceable fertilizer for high-quality vegetable cultivation. At present, the raw materials for the production of organic fertilizers mainly include: straw, soybean meal, chicken manure, cattle, sheep and horse manure, distiller's grains, vinegar grains, kitchen waste, river silt, sewer silt, etc. [0003] At present, with the increa...

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Problems solved by technology

[0004] During production, after the fish raw materials are broken, fermented, enzymatically hydrolyzed and filtered, the filtrate needs to be concentrated. The current concentration equipment usually uses a three-effect evaporator. Since the organic liquid fertilizer produced by our company contains domesticated rich Collect cadmium strains, so it is necessary to add strains to the concentrated filtrate. Since the temperature of the concentrated liquid discharged from the three-effect evaporator is usually around 50°C, if the strains are directly placed at this temperature, the survival rate of the strains will be reduced. Therefore, it is necessary to design an evaporator that can meet the mixing of bacteria and concentrated liquid, so as to meet the conditions of bacteria mixing

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