Dealkalized wet desulfurization waste fertilizer and preparation method thereof

A technology of wet desulfurization and waste, which is applied in the direction of fertilizer mixture, fertilization device, application, etc., to achieve the effect of increasing self-repair, avoiding secondary pollution, and ensuring fertilizer efficiency

Inactive Publication Date: 2012-02-08
DALIAN POLYTECHNIC UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problem of saline-alkali soil in our country, the present invention utilizes the wet desulfurization waste of thermal power plant - desulfurization gypsum, then adds acid-soluble chitosan, chitosan oligosaccharide and soil synergistic fertilizer materials and supplements iron, potassium, Zinc and other elements, so as to provide a compound fertilizer that can play the role of de-alkali water retention, fertilizer increase, can promote the growth of crops and strengthen the effect of soil self-repair

Method used

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  • Dealkalized wet desulfurization waste fertilizer and preparation method thereof
  • Dealkalized wet desulfurization waste fertilizer and preparation method thereof
  • Dealkalized wet desulfurization waste fertilizer and preparation method thereof

Examples

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Embodiment 1

[0050] (1) Preparation of dealkalization modified fertilizer

[0051] 1. Desulfurization gypsum: The wet desulfurization waste collected from thermal power plants is naturally dried for 50 days, and the moisture content is determined to be 5.1%. After crushing, the desulfurization gypsum with a particle size of less than 200 meshes is screened.

[0052] 2. Weigh 1kg chitosan and dissolve it in 2kg industrial grade acetic acid, stir evenly to obtain acid-soluble chitosan. Among them, chitosan is prepared by chemical method, and the degree of deacetylation is more than or equal to 98%.

[0053] 3. Weigh 10 kg of diammonium phosphate, 10 kg of urea, 5 kg of ammonium sulfate, and 5 kg of ammonium nitrate, mix and pulverize them, and stir them evenly to obtain fertilizer materials.

[0054] 4. Weigh 1 kg of potassium nitrate, 1 kg of zinc acetate, and 1 kg of ferric nitrate, mix and pulverize, and stir evenly to obtain additives.

[0055]5. Weigh 40kg of desulfurized gypsum, 1kg ...

Embodiment 2

[0071] (1) Preparation of dealkalization modified fertilizer

[0072] 1. Desulfurization gypsum: The wet desulfurization waste collected from thermal power plants is naturally dried for 50 days, and the moisture content is measured to be 7%. After crushing, the desulfurization gypsum with a particle size of less than 200 meshes is screened.

[0073] 2. Weigh 2kg chitosan and dissolve it in 2kg industrial grade acetic acid, stir evenly to obtain acid-soluble chitosan. Among them, chitosan is prepared by chemical method, and the degree of deacetylation is more than or equal to 98%.

[0074] 3. Weigh 15 kg of diammonium phosphate, 20 kg of urea, 10 kg of ammonium sulfate, and 10 kg of ammonium nitrate, mix and pulverize them, and stir to obtain fertilizer materials.

[0075] 4. Weigh 0.2 kg of potassium nitrate, 2 kg of zinc acetate, and 2 kg of ferric nitrate, mix and pulverize, and stir evenly to obtain additives.

[0076] 5. Weigh 50kg of desulfurized gypsum, 2.5kg of the ab...

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Abstract

The invention relates to a dealkalized wet desulfurization waste fertilizer which is prepared from power plant wet desulfurization waste-desulfurization gypsum, acid-soluble chitosan, chitosan oligosaccharide, fertilizer substances and assistants. The preparation method comprises the following steps of: respectively preparing acid soluble chitosan, chitosan oligosaccharide, fertilizer substances,assistants and other additives; and proportionally mixing the power plant desulfurization gypsum with the additives, drying the mixture, pulverizing, and filtering with a 200-mesh screen to obtain the dealkalized fertilizer. The invention rationally utilizes the power plant desulfurization waste, introduces organic substances, cooperates with the microbial action to enhance the self remediation effect of soil on the premise of ensuring fertilizer efficiency, phosphorization and water retention, and has obvious effects on improved utilization of saline alkali soil.

Description

technical field [0001] The invention relates to the field of modified compound fertilizers, in particular to a modified compound fertilizer for saline-alkali soil. Background technique [0002] Saline-alkali soil is a general term for saline soil and alkaline soil. According to incomplete statistics from UNESCO and FAO, the global saline-alkali soil area has reached 9.5x108hm 2 According to statistics, my country has 35 million hectares of saline-alkali land, distributed in 23 provinces (municipalities, autonomous regions). Soil salinization not only leads to the reduction of soil productivity, but also causes many ecological and environmental problems. With the shortage of land resources, it is necessary to find effective measures to prevent and improve saline-alkali soil. [0003] At present, there are many ways to improve saline-alkali land, mainly including water conservancy improvement, soil fertilization, chemical improvement, guest soil improvement, sand pressing imp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/04C05G3/80
Inventor 黄德智段卫红徐峰翟尚儒刘娜孟晨李婧于全王天琪
Owner DALIAN POLYTECHNIC UNIVERSITY
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