JPS5913040Y2 - methane generator - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a methane generator.

More specifically, the present invention relates to a methane fermentation device that is highly safe, has no sludge odor, is easy to repair, and can shorten fermentation time.

Conventionally, devices that connect a gas tank to a fermenter made of concrete or other materials have been used to treat sewage and produce methane gas, but both methods are unsafe and increase the smell of putrid sewage and the BOD of rivers. There are many problems and breakdowns, it is not easy to repair, and especially in winter, it is difficult to raise the fermentation temperature to speed up fermentation.

Recently, there has been a demand for efficient methane generators due to the problems of saving energy resources and treating sewage and wastewater.

This invention was completed in response to the above request, and uses microorganisms to decompose all unused organic matter, especially fibrous materials, from accumulated manure and household waste, and recovers the methane gas generated during fermentation to produce fuel. The object of the present invention is to provide a methane fermentation device that helps save money and allows the residue to be used as fertilizing water or decaying organic fertilizer.

In particular, the object is to provide a small-scale, simple, safe, inexpensive, highly efficient methane fermentation device that has few breakdowns, is easy to repair, and is highly efficient.

The methane fermentation device of the present invention is an injection tank for injecting a mixed liquid of accumulated manure and fibrous substances; a material made by processing plastics and mixing a material that absorbs solar heat, especially slag, is connected to this tank. A solar heat absorbing hose made of material (hereinafter referred to as material A); a preparation tank containing anaerobic microorganisms connected to this hose; a bag-shaped methane tank made of the above material A connected from this tank with an ordinary plastic pipe; A methane fermentation device in which a waste liquid tank connected to this tank and equipped with a waste liquid discharge pipe, a solid matter discharge pipe, a gas discharge pipe, etc.; an exhaust gas washer; and a methane storage tank of the above-mentioned material A are arranged in the above order.

One of the particularly characteristic parts used in the device of the present invention is the solar heat absorbing hose, which is made of a polymer or copolymer based on vinyl chloride, a polymer or copolymer based on ethylene or propylene. It is made by mixing a material that absorbs solar heat well, such as slag, into a pipe.

The rate of methane fermentation depends on temperature, but using this hose makes it easy to raise the liquid temperature to 4T to 50°C.

The relationship between fermentation temperature and the number of days required is as follows.

30°C ± 2 about 30 days 53°C ± 210 to 15 days Normally, in this invention, a length of about 50 m is used.

Approximately 1000% by weight of anaerobic microorganisms called methane-fermenting bacteria are added to the preparation tank.

The common plastic pipe used for connection is preferably a polymer or copolymer based on vinyl chloride, or a polymer or copolymer based on ethylene or propylene.

Usually, a hard vinyl chloride (PVC) pipe with a diameter of 22 cm is used.

The methane tank is a cylindrical bag made of the same material as the solar heat absorbing hose, and is 80% submerged in the soil so that the liquid stays in the tank for about 30 days.

A cylindrical one with a diameter of 2 m to 3 m and a length of 6.5 m to 71 m is used.

At the start, the tank is filled with water, and as methane gas is generated, the upper layer becomes a gas phase, but the liquid phase should be maintained at a constant level up to the level of the liquid sending pipe in the sedimentation tank.

Preferably, the bag-like material is sandwiched between an ordinary wooden frame or a steel frame, and weights are placed at two positions on the top frame (ie, an automatic compression device).

The waste liquid tank can be a concrete tank, but usually two hard PvC pipes with a diameter of about 22 cm (top and bottom) are connected to the methane tank, with the upper pipe discharging waste liquid and the lower pipe occasionally (about twice a year).
Used to release solids.

As the injection tank, a container made of an appropriate material is used as a waste liquid container.

The liquid may be drawn out from the waste liquid tank by using a waste liquid suction pump or by utilizing the topography at a liquid level.

The gas leaving the methane tank is passed through a cooling pipe to a washer.

A washer usually consists of a first column in which a dilute solution of caustic soda is deposited to remove CO2, and a second column in which water is deposited and passes through H2S.

You may also bubble it through the tank.

The methane obtained is about 80% of the amount of gas generated.

It is preferable to maintain the pressure of the methane tank at around 100 mm of water column and provide a safety valve.

A spherical one with a diameter of 1.5 m and a content of 3.5 m is usually used.

Spherical ones are safer. The materials used for solar heat absorption pipes and methane tanks do not become brittle, are acid resistant and retain heat, and can be easily repaired using PVC adhesive.

80% of what is obtained as gas is methane and the rest is CO2
, H2, H2S, etc.

The results of operations performed using the device of the present invention are shown below.

Amount of raw materials used: 0.5 m3/day Methane tank volume: 20 m3 Liquid volume in the methane tank: 14 m3 Raw material ratio: Manure 80% (inland water of approximately 60%) Used fibrous material (straw, sawdust reed, etc.) 20% (inner water of 30%) Use) Generally, urine is 98% water and 2% solids, and feces is 70% water.
Solid content 30%, straw, sawdust reed, etc. moisture 20-30%
%, solid content 80 to 70%, and home vegetables can be prepared manually with a moisture content of about 50%, but in this example, vegetables with the above moisture content were used.

Methane generation amount: 8m3/day The apparatus used in the present invention will be explained with reference to the drawings.

1 is a storage tank for excrement, urine and fibrous substances, which is usually installed above ground.

2 is a solar heat absorbing hose, which is made of the above-mentioned material A, has a diameter of about 5'', is processed to save space as shown in the figure, and has a total length of about 50 m.

3 is a preparation tank.

4 is a connecting pipe, 5 is a methane fermentation tank, and 6 and 7 are two hard PVC pipes, upper and lower, which are used to discharge liquid and solid matter.

8 is a waste liquid tank, 8□ is a liquid discharge pipe, 8□ is a sludge discharge pipe, 9 is a waste liquid groove, 10 is a gas cooling pipe, 11 is a valve, 12 is a safety water seal device, 13 is a 5% NaOH washing tank, 14 is a washing tank,
15 is a methane tank.

The generated methane gas is used as general household fuel, greenhouse cultivation, power generation, and motors.

The waste liquid is used for general agricultural crops as fertilizer water rich in N, P, K, and mineral trace elements or as a corrosive organic fertilizer.

Cow and pig feces are preferable as raw materials because of their high fiber content, but human feces are not so desirable because they contain too much fat and protein and are too high-grade.

When the device of the present invention is operated, there is almost no odor, and livestock producers who are concerned about odor pollution can prevent pollution by installing the device.

Furthermore, when discharging the waste liquid into a river, it can be discharged after treatment because it is easy to reduce the BCD to 30 ppm by treating it with photosynthetic bacteria and chlorella bacteria.

[Brief explanation of drawings]

Figure 1 is a side view of the flow sheet type device of the present invention;
The figure is a plan view of the Flow Sea I type of the device of the present invention. 1: Storage tank, 2: Solar heat absorption hose, 3: Preparation tank, 4
: Communication pipe, 5: Methane fermentation tank, 6, 7: Liquid and solid discharge pipe, 8: 1 or 2 liquids, sludge discharge tank, 9: Waste liquid ditch,
10: Gas cooling pipe, 11: Valve, 12: Water sealing device, 1
3: Soda washing tank, 14: Water washing tank, 15: Methane tank.

Claims (1)

[Scope of utility model registration request] A storage tank for a mixed solution of livestock manure and fibrous substances, connected to the storage tank, and made from a material made by processing a plastic material mixed with a substance that absorbs solar heat well (hereinafter referred to as material A). absorption hose, connected to this hose,
A preparation tank containing anaerobic microorganisms, a bag-shaped methane tank made of the above material A connected from the preparation tank with a normal plastic pipe, a waste liquid discharge pipe, a solid matter discharge pipe, and a gas discharge pipe connected to the above methane tank. a waste tank with
A methane generation device comprising a waste liquid groove connected to a waste liquid tank, a washer for exhaust gas from the methane tank, and a methane storage tank made of the material A connected to the washer.