Method for preparing carbon and producing controlled-release fertilizer by utilizing crop straws and controlled-release fertilizer prepared by using same

A technology for crop straw and slow-release fertilizer, applied in the field of slow-release fertilizer, can solve the problems of high requirements on the cultivation environment, complicated cultivation process of inoculants, and unsuitable for rural promotion and use, and achieves the effect of shortening the process flow and reducing energy consumption.

Active Publication Date: 2011-10-12
ZHEJIANG BULAIMENG AGRI SCI & TECH
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  • Summary
  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Chinese Patent Publication No. CN101638328A, published on February 3, 2010, discloses a kind of straw organic fertilizer and its preparation method. The process is complicated, and the degradation process is easily affected by external factors. Moreover, this method is not suitable for large-scale treatment of straw. The cultivation of bacterial agents for degrading straw requires professional and technical personnel and has high requirements for the cultivation environment. It is not suitable for promotion and use in rural areas.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] ① Straw crushing and granulation: First, the straw is subjected to three-stage crushing. The three-stage crushing includes crushing in the feeding section, primary crushing and secondary crushing. The particle size is less than 10mm, and the secondary crushing standard is that the particle size of the crushed product is less than 0.45mm, and then the crushed straw obtained after the third stage crushing is pressed into rod-shaped biomass fuel particles to obtain 100kg of biomass fuel particles, and the straw is crushed and granulated There is dry hot air at 150°C during the process;

[0028]②Burning out charcoal: Take 15kg of biomass fuel particles and add them to the No. 1 biomass energy burner (see the patent document of announcement number CN201751722U for details) and burn them; take 25kg of biomass fuel particles and add them to the No. 2 biomass energy burner for combustion. After burning, a total of 12kg of straw charcoal is obtained, and the particle size of the...

Embodiment 2

[0032] ① Straw crushing and granulation: First, the straw is subjected to three-stage crushing. The three-stage crushing includes crushing in the feeding section, primary crushing and secondary crushing. The particle size is less than 10mm, and the secondary crushing standard is that the particle size of the crushed product is less than 0.45mm, and then the crushed straw obtained after the third stage crushing is pressed into a block of biomass fuel particles to obtain 100kg of biomass fuel particles, straw crushing and production During the granulation process, there is 300°C dry hot air;

[0033] ② Burning charcoal: Take 20kg of biomass fuel particles and add them to the No. 1 biomass energy burner for combustion, take 40kg of biomass fuel particles and add them to the No. 2 biomass energy burner for combustion, and a total of 15kg of straw charcoal will be obtained after combustion;

[0034] ③ Fertilizer: Take 15kg of straw charcoal, add 10 kg of farmyard manure and 10 kg o...

Embodiment 3

[0037] ① Straw crushing and granulation: First, the straw is subjected to three-stage crushing. The three-stage crushing includes crushing in the feeding section, primary crushing and secondary crushing. The particle size is less than 10mm, and the secondary crushing standard is that the particle size of the crushed product is less than 0.45mm, and then the straw crushed product obtained after the third stage crushing is pressed into spherical biomass fuel particles to obtain 200kg of biomass fuel particles, and the straw is crushed and granulated During the process, there is 400°C dry hot air;

[0038] ② Burning charcoal: Take 30kg of biomass fuel particles and add them to the No. 1 biomass energy burner for combustion, take 80kg of biomass fuel particles and add them to the No. 2 biomass energy burner for combustion, and a total of 22kg of straw charcoal will be obtained after combustion;

[0039] ③ Fertilizer: Take 20kg of straw charcoal, add 20 kg of farmyard manure and 15...

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Abstract

The invention discloses a method for preparing carbon and producing a controlled-release fertilizer by utilizing crop straws and the controlled-release fertilizer prepared by using the method, solving the problem that the straws can not be effectively utilized. The method mainly comprises the three steps of straw granulation, combustion carbon discharge and fertilizer preparation. By using the method, batch processing and effective utilization are carried out on the straws; the method is easy to grasp, has strong environmental suitability and is suitable for large-scale popularization and usein countries; by using the method, carbon can be prepared from the straws and then is used for preparing the fertilizer and the straws can also be prepared into biomass fuel for use; and production process is environmentally-friendly, thereby achieving cyclic utilization of energy and relieving the critical conditions of fertilizers and fuels in countries.

Description

technical field [0001] The invention relates to the technical field of fertilizer production, in particular to a method for making charcoal from crop stalks and producing slow-release fertilizer and the prepared slow-release fertilizer. Background technique [0002] Crop straw is the crop residue with high fiber content left after the seeds are harvested, including cereals, beans, potatoes, oilseeds, hemp, and cotton, sugarcane, tobacco, melons and other crops. straw. Our country is very rich in straw resources. At present, there are nearly 20 kinds of important crop straws, and the output is huge. In addition to a large amount of carbon, crop straw also contains potassium, silicon, nitrogen, calcium, magnesium, phosphorus and other elements, as well as cellulose, hemicellulose, lignin, protein and amino acids. The straws of different crops contain different components. In general, the average organic matter content in straws is 15.00%, the average carbon content is 44.22%...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/00C01B31/02B09B3/00
Inventor 杜克镛
Owner ZHEJIANG BULAIMENG AGRI SCI & TECH
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