Production device and process of nitro-sulfur-based water-soluble fertilizer

Abstract

The invention provides a production device and process of a nitro-sulfur-based water-soluble fertilizer. A mixing tank, a phosphoric acid pipeline, a sulfuric acid pipeline, a liquid ammonia pipeline,a washing liquid pipeline and a medium-pressure steam pipeline are respectively connected with a tubular reactor through pipelines, the tubular reactor is arranged in a granulator, and the granulatoris connected to a nitro-sulfur-based water-soluble fertilizer storage device. The preparation process comprises the following steps: feeding a mixture of potassium salt, ammonium nitrate phosphate and a chelating agent as a solid raw material from a raw material system, and adding the mixture into a granulator; pumping monoammonium phosphate, ammonium nitrate phosphate, process water and low-pressure steam into a slurry storage tank to form monoammonium phosphate slurry; and forming blended slurry from the monoammonium phosphate slurry, ammonium nitrate phosphate, a washing solution and concentrated phosphoric acid, pumping the blended slurry into a mixing tank, pumping the blended slurry into a tubular reactor after the blended slurry is formed, pumping sulfuric acid, liquid ammonia andsteam into the tubular reactor, spraying the slurry into the granulator for granulating, and performing drying to obtain the nitro-sulfur-based water-soluble fertilizer. The mass fraction of water-insoluble substances of the prepared nitro fertilizer can be stabilized to 0.2-0.3%.

Description

technical field [0001] The invention relates to a new water-soluble fertilizer, in particular to a production device and process of a nitrosulfur-based water-soluble fertilizer. Background technique [0002] Water-soluble fertilizers are chemical fertilizers that can be quickly and completely dissolved in water. It can be used for foliar spraying, drip irrigation, sprinkler irrigation, etc. It can be solid powder, solid granule, liquid clear night, liquid suspension, etc. [0003] Water-soluble fertilizers in the prior art have the following characteristics: [0004] [0005] At present, the main problems of water-soluble fertilizers in my country include the following: [0006] (1) The production process is relatively backward. Compared with international water-soluble fertilizer companies, the current domestic water-soluble fertilizer production technology is relatively backward; in terms of research and development, the investment in funds and technical personnel i...

AI Technical Summary

Problems solved by technology

[0006] (1) The production process is relatively backward

Compared with international water-soluble fertilizer companies, the current domestic water-soluble fertilizer production technology is relatively backward; in terms of research and development, the investment in funds and technical personnel is seriously insufficient, and the production equipment is very simple

Many enterprises simply mix urea with potassium nitrate, potassium sulfate, water-soluble monoammonium phosphate and other raw materials after crushing. There is no dehumidification equipment in the production workshop, and the dyeing and anti-caking technology is not good enough. The fertilizer produced often deliquescence , flatulence, hardening, uneven dyeing, excessive impurities, poor water solubility, etc., seriously affect the sales of products

[0007] (2) The formula concentration is unscientific

Many domestic manufacturers do not determine the concentration according to the nutrient requirements of different crops and crop growth periods when formulating product formula concentration, which makes it difficult to achieve the expected effect when using the product

Blindly produce water-soluble fertilizers with high nutrient content, and fail to produce water-soluble fertilizers with medium and low nutrient content according to actual needs

[0008] (3) The product price is super high

At present, no matter the agricultural standard or the chemical standard, there are no indicators and detection methods for the dissolution rate, which makes it impossible to supervise

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