A combined utilization method of straw smoldering and rapid humification and its humus fertilizer product

A humification and smoldering technology, which is applied in the fields of fertilizer treatment control, fertilizer treatment heating/cooling, application, etc., can solve the problems of non-point source pollution, severe influence of phenological factors, slow humification process of straw, etc., and achieve energy reduction Consumption and cost, the effect of eliminating particulate matter pollution

CN106905072BActive Publication Date: 2021-02-02TONGJI UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2021-02-02

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Abstract

The invention relates to a combined utilization method of straw smoldering and rapid humification and a humic fertilizer product thereof. The combined utilization method specifically comprises the following steps: (1) crushing the straw to obtain straw powder; (2) crushing a part of the straw powder As smoldering straw powder, put it in a smoldering furnace, and smoldering will occur after the air is introduced to obtain smoldering ash and hot flue gas; Mix evenly together, and place in the humification reactor; (4) After mixing the hot flue gas and air, pass them into the humification reactor together, so that the humic fertilizer raw materials undergo rapid humification to obtain humic fertilizer fertilizer products. Compared with the prior art, the present invention combines the use of crop straw through smoldering and rapid humification, fully utilizes the smoldering ash and hot flue gas generated in the smoldering process in the rapid humification process, and realizes The rapid and efficient in-situ harmless utilization of straw is achieved, with little environmental pollution and high resource utilization.
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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...

Examples

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 ignited by electric heating to generate hot flue gas, which mixes with air and 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 and oxygen concentration in the smoldering system 1 in real time, as well as the temperature and ventilation in the humification system 2, 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...