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Straw smoldering and rapid humification combined use method and humic fertilizer product of straws

A humification and smoldering technology, applied in the direction of chemical fertilizer treatment control, application, organic fertilizer, etc., can solve the problems of severe influence of phenological factors, non-point source pollution, slow humification process of straw, etc., to eliminate particle pollution and reduce Effects on Energy Consumption and Costs

Active Publication Date: 2017-06-30
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the technical solution published in the above patent, the straw is reused through the humification of the straw, which avoids the waste of resources. However, the humification process of the crop straw in this method is slow and strongly affected by phenological factors. Nitrogen fertilizers can easily cause non-point source pollution

Method used

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  • Straw smoldering and rapid humification combined use method and humic fertilizer product of straws
  • Straw smoldering and rapid humification combined use method and humic fertilizer product of straws

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Such as figure 1 As shown, the straw powder is firstly crushed to obtain straw powder. The particle size of the crushed straw powder is 40-100 mesh; A part of straw powder is mixed with smoldering ash, microbial agent and animal manure to form a mixture. Such as figure 2 As shown, the straw powder in the smoldering furnace is electrically heated and ignited to generate hot flue gas. The hot flue gas mixed with air enters the silo-type composting reactor, and the humification system 2 starts to work. The operation process of the smoldering system 1 and the humification system 2 is controlled by the control system 3, which monitors and adjusts the air velocity, oxygen concentration in the smoldering system 1 and the temperature and ventilation in the humification system 2 in real time, so as to keep the smoldering System 1 and humification system 2 run stably.

Embodiment 2

[0041] A combined utilization method of straw smoldering and rapid humification, the method specifically includes the following steps:

[0042] (1) Crushing the straw to obtain straw powder, the particle size of the straw powder is 40-100 mesh;

[0043] (2) Use part of the straw powder as smoldering straw powder, control the mass percentage of moisture in the smoldering straw powder to 20%, and then place it in the smoldering furnace to ensure that the bulk density of the smoldering straw powder is 45kg / m 3 , into the air, adopt the reverse smoldering mode, ignite by electric heating, and keep the air flux on the smoldering surface at 7.0L / (m 2 s), the volume fraction of oxygen in the air is 0.6%, and smoldering ash and hot smoke are obtained after smoldering;

[0044](3) Another part of straw powder is used as humus fertilizer raw material, mixed evenly with smoldering ash, microbial agent and animal manure, and placed in a silo-type composting reactor, wherein the humus fer...

Embodiment 3

[0047] A combined utilization method of straw smoldering and rapid humification, the method specifically includes the following steps:

[0048] (1) Crushing the straw to obtain straw powder, the particle size of the straw powder is 100-160 mesh;

[0049] (2) Use part of the straw powder as smoldering straw powder, control the mass percentage of moisture in the smoldering straw powder to 25%, and then place it in the smoldering furnace to ensure that the bulk density of the smoldering straw powder is 40kg / m 3 , into the air, adopt the reverse smoldering mode, ignite by electric heating, and keep the air flux on the smoldering surface at 8.0L / (m 2 s), the volume fraction of oxygen in the air is 0.5%, and smoldering ash and hot smoke are obtained after smoldering;

[0050] (3) Another part of straw powder is used as humus fertilizer raw material, mixed evenly with smoldering ash, microbial agent and animal manure, and placed in a silo-type composting reactor, wherein the humus f...

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Abstract

The invention relates to a straw smoldering and rapid humification combined use method and a humic fertilizer product of straws. The combined use method specifically comprises the following steps: (1) crushing the straws, thereby obtaining straw powder; (2) putting part of the straw powder serving as smoldering straw powder into a smoldering furnace, and feeding air for smoldering, thereby obtaining smoldered ash and hot flue gas; (3) uniformly mixing the other part of the straw powder, which serves as a humic fertilizer raw material, with the smoldered ash and an auxiliary material, and putting the mixture into a humification reactor; (4) mixing the hot flue gas with the air, and feeding the hot flue gas and air mixture into the humification reactor to enable the humic fertilizer raw material to be rapidly humified, thereby obtaining the humic fertilizer product. Compared with the prior art, the straw smoldering and rapid humification combined use method has the advantages that the straws which are crops are subjected to smoldering and rapid humification for combined use, and the smoldered ash and the hot flue gas which are produced in the smoldering process are fully used in a rapid humification process, so that rapid and efficient in-situ harmless use of the straws is realized, the environmental pollution is low, and the resource utilization rate is high.

Description

technical field [0001] The invention belongs to the technical field of agricultural waste recycling and relates to a combined utilization method of straw smoldering and rapid humification and a humic fertilizer product thereof. Background technique [0002] Agricultural waste refers to the waste discharged in agricultural production, agricultural product processing, livestock and poultry breeding and rural residents' life. In recent years, with the development of the rural economy and the improvement of the living standards of rural residents, great changes have taken place in people's consumption concepts and consumption patterns. In order to pursue high-quality living standards and a convenient lifestyle, farmers have the ability and conditions to use coal and other mineral energy in large quantities, making straw no longer the only choice for farmers' energy consumption, resulting in a large amount of straw being abandoned in the fields. In some areas, the remaining stra...

Claims

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Application Information

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IPC IPC(8): C05G3/04C05F17/02C05F17/00C05G3/80
CPCC05D9/00C05F17/15C05F17/70C05F17/979C05F17/993C05G3/80C05F3/00C05F11/00C05F11/08Y02W30/40
Inventor 赵由才夏发发郑毅李建国牛冬杰柴晓利
Owner TONGJI UNIV
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