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Method for producing nitrogen phosphorus and potassium compound fertilizer by utilizing straw ash

A technology of nitrogen, phosphorus and potassium compound fertilizer and straw ash, applied in urea compound fertilizer, nitrogen fertilizer, potassium fertilizer, etc., can solve the problems of nutrient loss, low nutrient availability, and damage to soil physical and chemical properties, and achieve high nutrient availability and production equipment Effects that are simple, easy to produce and scale

Inactive Publication Date: 2017-11-28
蒋寿悟
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Plant ash is a commonly used fertilizer source in traditional agriculture in my country, but its nutrient availability is low, it is easy to cause nutrient loss, and long-term application is easy to damage the physical and chemical properties of the soil.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1. make the NPK compound fertilizer that nutrient content is 45%, and nutrient ratio is N: P 2 o 5 : K 2 O=15:15:15.

[0027] Take 10 parts of powdery raw material straw ash, 25.1 parts of urea, 31.4 parts of monoammonium phosphate, 22.6 parts of potassium chloride, and 9.4 parts of attapulgite binder and add them to the running drum in turn, and then take phosphoric acid and citric acid according to the weight ratio 1.5 parts of 1:0.3 mixed acidity regulator mixed with appropriate amount of water, sprayed on the reaction material. Turn the drum to granulate for 5-7 minutes. When the reaction raw materials form fertilizer granules with a relatively uniform size, the semi-finished fertilizer enters the drying cylinder.

[0028] Control the temperature of the drying cylinder to 90-110°C, and the drying time to 8-12 minutes. The water content of the fertilizer is reduced to below 5%, and the dry-heated fertilizer enters the next cooling cylinder for cooling. ...

Embodiment 2

[0030] Embodiment 2. make the NPK compound fertilizer that nutrient content is 40%, and nutrient ratio is N: P 2 o 5 : K 2 O=15:10:15.

[0031] As described in Example 1, the different raw materials are as follows, all in parts by weight: get 20 parts of straw ash, 28.5 parts of urea, 17.4 parts of monoammonium phosphate, 20.2 parts of potassium chloride, bentonite and attapulgite in a weight ratio of 1:3 Add 11 parts of the mixed binder in turn to the running drum, weigh 3 parts of the acidity regulator mixed with phosphoric acid and citric acid in a weight ratio of 1:0.5, mix with an appropriate amount of water, and evenly spray on the mixed materials.

Embodiment 3

[0032] Embodiment 3. make the NPK compound fertilizer that nutrient content is 35%, and nutrient ratio is N: P 2 o 5 : K 2 O=13:10:12.

[0033] As described in Example 1, the different raw materials are as follows, all in parts by weight: get 30 parts of straw ash, 24.8 parts of urea, 14.7 parts of monoammonium phosphate, 12.9 parts of potassium chloride, bentonite or attapulgite in a weight ratio of 1:2 Add 13.2 parts of the mixed binder to the rotating drum in turn, weigh 4.4 parts of the acidity regulator mixed with phosphoric acid and citric acid in a weight ratio of 1:0.3, mix with an appropriate amount of water, and spray evenly on the mixed materials.

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PUM

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Abstract

The invention discloses a method for producing a nitrogen phosphorus and potassium compound fertilizer by utilizing straw ash and belongs to the technical field of agricultural fertilizers. The nitrogen phosphorus and potassium compound fertilizer comprises the following components in parts by weight: 18-30 parts of urea, 12-30 parts of monoammonium phosphate, 7-25 parts of potassium chloride, 10-40 parts of straw ash, 1.2-6 parts of an acidity regulator and 5-20 parts of an adhesive. The method comprises the following steps: grinding raw materials, adding, performing drum granulation, drying, screening, weighing, and packaging, thereby obtaining the product. The nitrogen phosphorus and potassium compound fertilizer disclosed by the invention has the content of more than 30% of the nitrogen phosphorus and potassium nutrients, contains medium trace nutrient elements in the straw ash, is comprehensive and reasonable in nutrient ratio, does not need to be matched with other fertilizers, can be directly applied, and is suitable for different soil and crops. The production equipment is simple, the cost is low, the defects in the conventional fertilizer production are solved, an effective path is provided for reasonable utilization of the straw ash for straw power generation, and the pollution of the straw ash on the environment is reduced.

Description

technical field [0001] The invention relates to a method for producing nitrogen, phosphorus and potassium compound fertilizer by using straw ash. Background technique [0002] my country is a big agricultural country, and the crop straw produced every year reaches as many as 1 billion tons. According to the survey, the current utilization of such a huge amount of straw is not optimistic: 6.9% of the straw is directly returned to the field, 14.9% is returned to the field after the abdomen, 13.3% is used for manure, 11.9% is used for rural life energy, 7.8% is used for raw materials for industrial and sideline production, and 7.8% is used for comprehensive straw production. The utilization rate is 54.8%, and the remaining 45.2% of the straw still needs to be reused. [0003] At present, it is common for farmers to burn remaining straw during summer or autumn. Straw burning not only leads to the increase of suspended particles in the air, but also pollutes the atmospheric env...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00
CPCC05B7/00C05G3/00C05G5/12C05C9/00C05D1/00C05D1/02C05D9/00
Inventor 蒋寿悟
Owner 蒋寿悟
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