FIELD IN-PLACE FILM-COVERING FERMENTATION DEVICE

20230278084

18/083508

December 17, 2022

A field in-place film-covering fermentation device is provided. The device includes a support structure, a covering film, and a ventilation structure. The support structure is connected to the covering film through cross-connecting rings on the covering film to form a columnar pile structure. The covering film is in a split configuration to form an upper surface, a lower surface, and a side elevation of the columnar pile structure by cutting. The ventilation structure is fixed in the columnar pile structure. The device can realize the in-place and nearby treatment of organic wastes, improve the material conversion efficiency of agricultural organic wastes in their production area, and promote the improvement of the regional ecological environment.

1. A field in-place film-covering fermentation device, comprising a support structure, a covering film and a ventilation structure; wherein the support structure is connected to the covering film through cross-connecting rings on the covering film to form a columnar pile structure; the covering film is in a split configuration to form an upper surface, a lower surface and a side elevation of the columnar pile structure by cutting; and the ventilation structure is fixed in the columnar pile structure.

2. The field in-place film-covering fermentation device according to claim 1, wherein the support structure is composed of wire mesh, two ends of the wire mesh are welded with metal plates, and the metal plates are disposed with blocking leakage mechanisms to make the wire mesh be erected in a cylindrical shape through connection of the blocking leakage mechanisms on the metal plates.

3. The field in-place film-covering fermentation device according to claim 1, wherein the covering film is made of polytetrafluoroethylene material having a microporous structure with a pore size of 0.2 micrometers (pin).

4. The field in-place film-covering fermentation device according to claim 1, wherein the ventilation structure comprises a non-power wind cap, an electric air valve, a perforated polyvinyl chloride (PVC) pipe, a temperature sensing probe, a solar power supply unit and a control circuit; the non-power wind cap, the electric air valve and the perforated PVC pipe are sequentially connected in that order, the temperature sensing probe is disposed inside the columnar pile structure; and the control circuit is individually connected to the solar power supply unit, the temperature sensing probe and the electric air valve.

5. The field in-place film-covering fermentation device according to claim 4, wherein the non-power wind cap, electric air valve and the perforated PVC pipe are placed vertically above the columnar pile structure.

6. The field in-place film-covering fermentation device according to claim 4, wherein a pipe diameter of the perforated PVC pipe is determined by a formula as follows: [mathematical expression included] where Rpipe represents a radius of the perforated PVC pipe, Sstructure represents a ventilation area of the covering film formed on a pile body, Kgas represents a maximum permeability of the covering film used, Pmaterial represents a porosity of a material to be composted, and Vinteral max represents a maximum internal wind speed generated by rotation of the non-power wind cap caused by an external wind pressure without considering an internal heat pressure.

7. The field in-place film-covering fermentation device according to claim 6, wherein a number of holes of the perforated PVC pipe is [mathematical expression included] where Spipe represents a cross-sectional area of the perforated PVC pipe, Shole represents a perforated area of the perforated PVC pipe, and a radius r of Shole is in a range of 10 millimeters (mm) to 30 mm.

8. The field in-place film-covering fermentation device according to claim 7, wherein a perforated range of the perforated PVC pipe is from a bottom of the perforated PVC pipe to a lower edge of a rotating circumference of the electric air valve, and a longitudinal spacing of the perforated PVC pipe is determined by [mathematical expression included] where dhole represents the longitudinal spacing of the perforated PVC pipe and Lmaterial represents a length from the electric air valve to the bottom of the perforated PVC pipe.

9. The field in-place film-covering fermentation device according to claim 4, wherein the control circuit is configured to control opening of the electric air valve, the temperature sensing probe is configured to measure temperature of a pile body in the columnar pile structure, and relationships between the temperature of the pile body and the opening of the electric air valve are as follows: 10% of opening of the electric air valve corresponding to the temperature t of the pile body being greater than 0° C. and less than or equal to 15° C.; 20% of opening of the electric air valve and 40% of opening of the electric air valve both corresponding to the temperature t of the pile body being greater than 15° C. and less than or equal to 35° C.; 60% of opening of the electric air valve corresponding to the temperature t of the pile body being greater than 35° C. and less than or equal to 60° C.; and 100% of opening of the electric air valve corresponding to the temperature t of the pile body being greater than 60° C.

10. The field in-place film-covering fermentation device according to claim 4, wherein a height h of the support structure is in a range of greater than 1 meter and less than or equal to 2 m.

09; 12; 12; 12

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