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Soil conditioner and preparation method thereof

A technology of soil improver and semi-coke powder, which is applied in the field of soil improver and its preparation, can solve the problems of increasing new uses of semi-coke powder, and achieve the effect of superior performance, small particle size, and large specific surface area

Inactive Publication Date: 2018-05-29
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Based on the above, there is currently no technology on how to apply semi-coke powder to soil improvers, so as to increase the new uses of semi-coke powder and turn waste into treasure

Method used

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  • Soil conditioner and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] The preparation process of the soil conditioner of the present embodiment is as follows:

[0035] Soak low-modified pulverized coal in a mixed acid with a mass ratio of nitric acid and phosphoric acid of 3:1, heat to 60°C, and stir for 2 hours at a stirring rate of 3600r / h. In order to protect the pyrolysis equipment in the later stage, adjust the pH to neutral, filter and dry to obtain ash-free and low-deterioration pulverized coal. Low-temperature dry distillation of deashed and low-modified pulverized coal in an electric furnace. The heating rate of the electric furnace is set at 10°C / min, the final pyrolysis temperature is 800°C, and the residence time is 40min. Grind to 300 mesh, after activating the pores, soak in a mixture of sodium nitrate and potassium phosphate with a mass ratio of 1:1, heat to 40°C, and stir for 0.5h at a stirring rate of 1800r / h to absorb the necessary sodium, Potassium, nitrogen, phosphorus and other elements until the adsorption is satura...

Embodiment 2

[0040] The preparation process of the soil conditioner of the present embodiment is as follows:

[0041] Soak low-modified pulverized coal in a mixed acid with a mass ratio of nitric acid and phosphoric acid of 3:1, heat to 60°C, and stir for 2 hours at a stirring rate of 3600r / h. In order to protect the pyrolysis equipment in the later stage, adjust the pH to neutral, filter and dry to obtain ash-free and low-deterioration pulverized coal. Low-temperature dry distillation of deashed and low-modified pulverized coal in an electric furnace. The heating rate of the electric furnace is set at 10°C / min, the final pyrolysis temperature is 800°C, and the residence time is 40min. Grind to 200 mesh, after activating the pores, soak in a mixture of sodium nitrate and potassium phosphate with a mass ratio of 1:1, heat to 40°C, and stir for 0.5h at a stirring rate of 1800r / h to absorb the necessary sodium, Potassium, nitrogen, phosphorus and other elements until the adsorption is satura...

Embodiment 3

[0043] The preparation process of the soil conditioner of the present embodiment is as follows:

[0044] Soak low-modified pulverized coal in a mixed acid with a mass ratio of nitric acid and phosphoric acid of 5:1, heat to 80°C, and stir for 4 hours at a stirring rate of 4800r / h. In order to protect the pyrolysis equipment in the later stage, adjust the pH to neutral, filter and dry to obtain ash-free and low-deterioration pulverized coal. Low-temperature dry distillation of deashed and low-modified pulverized coal in an electric furnace. The heating rate of the electric furnace is set at 10°C / min, the final pyrolysis temperature is 800°C, and the residence time is 40min. Grind to 250 mesh, after activating the pores, soak in a mixture of sodium nitrate and potassium phosphate with a mass ratio of 2:1, heat to 60°C, and stir for 1 hour at a stirring rate of 3000r / h to absorb sodium and potassium necessary for crops , nitrogen, phosphorus and other elements until the adsorpti...

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Abstract

The invention discloses a soil conditioner and a preparation method thereof. The soil conditioner is prepared by the following steps: producing semi-coke powder by deashing pulverized coal and carrying out low-temperature destructive distillation, carrying out activation and pore forming to adsorb essential element such as nitrogen, phosphorus, potassium, sodium and the like for crops, carrying out suction filtering and drying, and carrying out mixing with a certain amount of quicklime, wherein the grain size of the semi-coke is 200-300 meshes, the weight of the semi-coke accounts for 80%-90%of the total weight of the soil conditioner, the grain size of the quick lime is 400-500 meshes, and the weight of the quick lime accounts for 10%-20% of the total weight of the soil conditioner. Thesoil conditioner provided by the invention is an economical, environment-friendly and high-efficiency soil conditioner, and can be used for improving barren and acid soil and the like. According to the invention, the resource problem that the semi-coke is difficult to handle and utilize is solved, and the soil conditioner provided by the invention can efficiently supply and maintain the essentialelements and moisture for the crops in the soil.

Description

technical field [0001] The invention relates to the technical field of soil improvement, in particular to a soil improver and a preparation method thereof. Background technique [0002] Soil improver is a preparation that can improve soil structure and physical and chemical indicators. After being applied to the soil, it can improve soil structure, increase soil nutrients and maintain soil moisture. application is becoming more and more widespread. At the same time, soil improvers have been widely used in crop production, protected forest planting, pasture production, urban greening, highway greening and flower production. [0003] Semi-coke powder is a kind of clean fuel produced by low-temperature dry distillation of pulverized coal or lump coal due to chemical, physical and mechanical reasons. It has many micropores, small particle size, light specific gravity, large specific surface area, poor strength and economical Features of low value. In recent years, my country'...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/04C09K17/06C09K101/00C09K109/00C05G3/80
CPCC05B7/00C05G3/80C09K17/06C09K2101/00C09K2109/00C05C5/02C05D3/02C05D9/00
Inventor 周军吴雷罗敏梁坤刘长波侯治威张秋利宋永辉
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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