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Calcium-nitrogen fertilizer and preparation method thereof

A nitrogen fertilizer and calcium source technology, applied in nitrogen fertilizer, fertilization device, nitrate fertilizer and other directions, can solve the problems of low solubility, high concentration of calcium sulfate, and inability to realize the coexistence of acyl nitrogen.

Inactive Publication Date: 2017-09-05
GUIZHOU BATIAN ECOTYPIC ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Nitrogen exists in three states: acyl nitrogen, nitrate nitrogen, and ammonium nitrogen. Urea itself cannot be directly absorbed by plants. It needs to be decomposed into ammonium nitrogen by urease before crops can absorb it. This prolongs the release period of nitrogen. Can play a long-term effect; and the application of ammonium nitrogen and nitrate nitrogen can be directly absorbed by crops, which has a quick effect, but the concentration of ammonium nitrogen is high, especially in hot weather, ammonium nitrogen is decomposed into Ammonia volatilization, causing ammonia loss and seedling burning
Existing nitrogen fertilizer products contain only two forms of nitrogen, and cannot achieve the coexistence of acyl nitrogen, nitrate nitrogen, and ammonium nitrogen (tri-nitrogen). On the other hand, calcium and other elements in the fertilizer will form calcium sulfate, sulfuric acid The solubility of calcium is not high, resulting in the loss of calcium source

Method used

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Examples

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preparation example Construction

[0030] The preparation method of above-mentioned calcium nitrogen fertilizer, comprises the following steps:

[0031] Step S110, evaporating and concentrating the dilute urine to obtain urine.

[0032] Preferably, the mass concentration of dilute urine is 74%-82%, and the mass concentration of urine is 95%-99.75%.

[0033] Preferably, the temperature of the dilute urine is 80°C to 90°C.

[0034] It can be understood that the purpose of the urine is to provide urea. If solid urea is used in the subsequent steps, step S110 can be omitted, or if the raw material is urine with a mass concentration of 95% to 99.75%, no concentration is required. Steps can also be omitted.

[0035] Step S120, mixing urea and calcium source to prepare slurry.

[0036] Urea may exist in the state of solid urea or in the state of urine. The mass concentration of urine is 95%-99.75%.

[0037] In one embodiment, the urea in the state of solid urea is mixed and melted with the calcium source to obtai...

Embodiment 1

[0047] The preparation method of the calcium nitrogen fertilizer of embodiment 1 may further comprise the steps:

[0048] The dilute urine with a temperature of 80°C and a concentration of 80wt% from the urea workshop is sent to the urea evaporation device on the prilling tower with a pump body, and the urine with a concentration of 99.75% is obtained through evaporation and concentration, and the urine enters the pulping device on the tower The mixing tank is mixed with the calcium nitrate solution at a weight ratio of 85:15; after mixing, it flows into the emulsifier of the pulping device on the tower to emulsify and mix evenly to obtain slurry; the slurry is passed into the granulator on the tower for granulation to obtain granules Calcium and nitrogen fertilizer particles with a diameter of 1 mm to 4 mm.

Embodiment 2

[0050] The preparation method of the calcium nitrogen fertilizer of embodiment 2 may further comprise the steps:

[0051] The dilute urine with a temperature of 80°C and a concentration of 80wt% from the urea workshop is sent to the urea evaporation device on the prilling tower with a pump body, and the urine with a concentration of 99.75% is obtained through evaporation and concentration, and the urine enters the pulping device on the tower The mixing tank is mixed with the calcium nitrate solution at a weight ratio of 50:50; after mixing, it flows into the emulsifier of the pulping device on the tower to emulsify and mix evenly to obtain slurry; the slurry is passed into the granulator on the tower for granulation to obtain granules Calcium and nitrogen fertilizer particles with a diameter of 1 mm to 4 mm.

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Abstract

The invention relates to calcium-nitrogen fertilizer and a preparation method thereof. The calcium-nitrogen fertilizer is characterized by being prepared from, by weight, 6-95 parts of urea, 5-94 parts of calcium source, inevitable impurities and water, wherein the calcium source is selected from at least one of calcium nitrate and ammonium calcium nitrate. Acyl nitrogen, nitric nitrogen and ammonium nitrogen coexist in the calcium-enriched fertilizer, and dissolution performance of calcium is good.

Description

technical field [0001] The invention relates to a calcium nitrogen fertilizer and a preparation method thereof. Background technique [0002] Crops and garden plants need to absorb more nutrients in a growth cycle. Fertilizers can provide the nutrients needed by crops, change the composition of the soil, improve the fertility of the soil, and increase the organic matter of the soil. Reasonable fertilization plays a decisive role in the growth and development of crops, the promotion of crop metabolism, and the increase of crop yield per unit area. [0003] Nitrogen and calcium are essential elements for crop growth and development. Calcium can increase the disease resistance of crops and improve fruit quality; nitrogen is a component of amino acids in plants, a component of protein, and a component of chlorophyll for photosynthesis in plants. Nitrogen exists in three states: acyl nitrogen, nitrate nitrogen, and ammonium nitrogen. Urea itself cannot be directly absorbed by ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05C13/00
CPCC05C5/04C05C9/00C05G5/12
Inventor 范素民冯军强任光耀姚耿彪吴嫒
Owner GUIZHOU BATIAN ECOTYPIC ENG CO LTD
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