Method for actively killing injurious insects in grain bulk by using gas-solid two-phase flow

A gas-solid, grain pile technology, applied in the application, edible seed preservation, and chemical preservation of seeds, etc., can solve the high requirements of temperature and relative humidity granary airtightness, easy to be affected by pest species, and insecticidal effect. It is not obvious and other problems, and achieves the effects of preventing mildew and grain agglomeration, good insect control and insecticidal effect, and low labor intensity.

Active Publication Date: 2015-03-25
ACAD OF NAT FOOD & STRATEGIC RESERVES ADMINISTRATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This type of insecticide has a good insecticidal effect, but it has high requirements on temperature, relative humidity, and the airtightness of the granary, and is also easily affected by the types of pests, and its own high toxicity may also cause danger to operators.
In addition, the existing insecticide methods are all passive insecticides, that is, the insecticides are distributed in the grain pile first, and when the pests crawl or feed on the grains, the pests come into contact with the insecticides and are killed. The problem that the insecticidal effect is not obvious

Method used

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  • Method for actively killing injurious insects in grain bulk by using gas-solid two-phase flow
  • Method for actively killing injurious insects in grain bulk by using gas-solid two-phase flow
  • Method for actively killing injurious insects in grain bulk by using gas-solid two-phase flow

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0056] The Method of Actively Killing Insects by Two-Phase Flow Downward Spraying

[0057] Such as figure 1As shown in , the system includes: a granary 1, an air duct 2, a ventilator 4 and a duster 5 (such as a spray duster). Grain pile 9 is placed in granary 1. The ventilation channel 2 is located below the bottom surface of the granary 1 . The air inlet of the ventilator 4 is connected with the air duct opening 3 . The duster 5 communicates with the granary 1 at a position higher than the upper surface of the grain pile.

[0058] Start ventilator 4, form downward vertical airflow in bulk grain grain pile 9. Powder 6 (food anticaking agent silicon dioxide) is sprayed to the upper space of bulk grain grain pile 9 with the duster 5 that powder 6 is installed, and the gas-solid two-phase aerosol 7 that forms gas and solid mixture. The gas-solid two-phase aerosol 7 will form a gas-solid two-phase flow 8 along with the vertical airflow of the ventilator, and enter the grain p...

Embodiment 2

[0063] The Method of Actively Killing Insects by Two-Phase Flow Upward Pollination

[0064] Such as figure 2 As shown in , the system includes: a granary 1, an air duct 2, a ventilator 4 and a duster 5. Grain pile 9 is placed in granary 1. The ventilation duct 2 is arranged below the bottom surface of the granary 1 . The ventilator 4 is arranged outside the granary, and the air inlet communicates with the granary 1 at a position higher than the upper surface of the grain pile. The powder sprayer 5 is arranged outside the granary, and the powder outlet is connected with the ventilation channel mouth 3 .

[0065] Open the duster 5, spray powder 6 (food anti-caking agent silicon dioxide), the powder 6 is mixed with the air in the ventilation channel to form a gas-solid two-phase aerosol (not shown); The tuyeres generate an upward airflow in the granary 1, and the upward airflow drives the gas-solid two-phase aerosol into the granary 1 through the ventilation opening 3, formi...

Embodiment 3

[0077] The Method of Actively Killing Insects by Fan Press-in Two-Phase Flow Upward Spraying Powder

[0078] Such as image 3 As shown in , the system includes: a granary 1, an air duct 2, a ventilator 4 and a duster 5. Grain pile 9 is placed in granary 1. The ventilation duct 2 is arranged below the bottom surface of the granary 1 . Ventilator 4 is arranged outside the granary, and the air outlet links to each other with ventilation channel mouth 3. The powder sprayer 5 is arranged outside the granary, and the powder outlet is connected with the ventilation channel mouth 3 .

[0079] Open the powder sprayer 5, spray powder 6 (food anti-caking agent silicon dioxide), the powder 6 is mixed with the air in the ventilation channel to form a gas-solid two-phase aerosol (not shown); open the fan 4, the fan 4 The air outlet generates upward airflow in the granary 1 through the air duct 3, and the upward airflow drives the gas-solid two-phase aerosol into the granary 1 to form a ...

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Abstract

The invention discloses a method for actively killing injurious insects in a grain bulk by using a gas-solid two-phase flow. The method comprises the following steps: spraying out powder by using a power sprayer, wherein the powder is mixed with air above the grain bulk or air in a ventilating duct to form a gas-solid two-phase aerosol; forming an air flow in the grain bulk by using a ventilator; enabling the gas-solid two-phase aerosol to move along with the air flow to form the gas-solid two-phase flow; and enabling the gas-solid two-phase flow to enter into the grain bulk via gaps among grains in the grain bulk to be actively contacted with injurious insects among the grains for actively killing injurious insects. By selecting proper insecticidal powder and selecting the gas-solid two-phase flow to apply powder, the insecticidal powder is fully and uniformly contacted with the grains and the method is low in requirement on leakproofness of the grain bulk, temperature, pest species, humidity and the like, easy to operate and harmless to human body.

Description

technical field [0001] The invention relates to a method for actively killing insects in grain piles by using gas-solid two-phase flow. Background technique [0002] During the storage of grain in the granary, insects and molds often appear, which will increase the loss of stored grain and accelerate the deterioration of the quality of stored grain. [0003] Existing chemical insecticide method mainly contains two kinds: a kind of is that non-volatile solid or liquid insecticide is mixed or sprayed in grain heap. Solid insecticides have problems such as poor uniformity during mixing, high dust concentration in the working environment, adverse health effects, and high labor intensity. Liquid insecticides have problems such as poor uniformity and limited penetration during spraying. Before using this type of insecticide, it is necessary to deinsectize the empty warehouse first. The other is to kill insects by vaporizing under normal temperature and pressure or producing tox...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23B9/18A23B9/24
Inventor 李燕羽赵会义季振江杨旭李福君汪中明石天玉何睿齐艳梅曹阳魏雷
Owner ACAD OF NAT FOOD & STRATEGIC RESERVES ADMINISTRATION
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