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Stalk air fertilizer coproduction method and matching apparatus thereof

A gas-fertilizer co-production and straw technology, which is applied in fertilization devices, biochemical equipment and methods, gas production bioreactors, etc., can solve problems such as fire hazards and residents' personal and property safety threats, affecting the safety of high-voltage power grids, and destroying soil structure. , to achieve the effect of solving the shortage of fertilizer and energy in rural areas, improving market competitiveness and strong fermentation ability

Active Publication Date: 2012-06-27
HENAN AGRICULTURAL UNIVERSITY
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  • Description
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Problems solved by technology

Burning straw anywhere not only wastes agricultural resources, but also poses a great threat to the personal and property safety of local residents, and sometimes even affects the safety of aviation, railways, highways and high-voltage power grids.
In addition, burning straw can also damage the soil structure and cause nutrient loss

Method used

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  • Stalk air fertilizer coproduction method and matching apparatus thereof
  • Stalk air fertilizer coproduction method and matching apparatus thereof

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Embodiment Construction

[0022] The method for co-production of straw gas and fertilizer comprises the following steps: (1) putting straw and auxiliary fermentation material into a fermentation device for anaerobic fermentation to collect biogas; (2) finishing fermentation after the peak of gas production, and releasing all fermentation materials. In order to improve the convenience of fermented organic fertilizer application, storage and transportation, slag-liquid separation is required after discharge. The fermentation device can be equipped with multiple groups at the same time, and each group can be fed, fermented and discharged in batches.

[0023] figure 1 It is a schematic diagram of the structure of the straw gas-fertilizer co-production device. The device comprises a fermenter 2, the fermenter 2 is provided with a feed port 1, a discharge port 3 and an air outlet 13, the fermenter 2 tank wall is provided with a circulation pipe 11 communicating with the cavity in the tank, and the circulati...

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Abstract

The invention relates to a biogas fertilizer coproduction method of straws and an assorted device thereof. Aiming at converting the straws into organic fertilizers more efficiently and simultaneously obtaining biogas fuel, the invention provides the biogas fertilizer coproduction method of straws, which comprises the following steps of: putting the straws and auxiliary fermenting materials into afermenting device for anaerobic fermentation and collecting biogas; ending fermentation after the biogas-production peak, and discharging fermenting materials completely. The invention also provides an assorted device of the method, comprising a fermenting tank; and the fermenting tank is provided with a feed inlet, a discharging outlet and a biogas outlet. The assorted device is characterized inthat the tank wall of the fermenting tank is provided with a circulating pipe communicated with a cavity in the tank; the upper port of the circulating pipe is positioned below the liquid level of the fermenting liquor and the lower port thereof is close to the bottom part of the fermenting tank; and the circulating pump is internally provided with a circulating pump. The method can overcome the defects of odorous pollution in the process of aerobic composting of straws, acidification and incrustation in direct anaerobic fermentation and little methane in the produced gas. The device has simple structure and strong fermentability.

Description

technical field [0001] The invention relates to a gas-fertilizer co-production method and a device, in particular to a method and a supporting device for using straw to perform biogas and biogas co-production. Background technique [0002] China's total grain output in 2008 reached 528.5 million tons, based on which it is estimated that the output of major crop straws is about 600 million tons. my country's straw resource technology is showing diversified development, but a considerable part of crop straw is still abandoned in the fields, river ditches, or burned. Burning straw anywhere is not only a waste of agricultural resources, but also poses a great threat to the personal and property safety of local residents, and sometimes even affects the safety of aviation, railways, highways and high-voltage power grids. In addition, straw burning will destroy the soil structure and cause nutrient loss. [0003] The biogas residue and biogas slurry after anaerobic fermentation o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C05F17/00C05F17/02
CPCC12M21/04C12M23/58Y02E50/30Y02T50/678Y02W30/40
Inventor 张全国杨群发李刚黄俊申翔伟
Owner HENAN AGRICULTURAL UNIVERSITY
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