JPS58133890A - Overflow apparatus of methane fermentation tank - Google Patents

Abstract

PURPOSE:To maintain exactly and easily an overflow pipe by providing a valve at a lower end of the overflow pipe fitted to the outside wall of the fermentation vessel and forming the top of the overflow pipe with the inverted U-shaped pipe having a siphon cutting. CONSTITUTION:The siphon cutting 4 is provided freely for attachably and detachably to the top of the overflow pipe 3 fitted to the outside wall of the methane fermentation tank 1 through a branching pipe 7. The valve 5 is provided at the lower end of the pipe 3 just under the cutting 4. Scums and untreated wastes clogged on the upper liquid surface of the pipe 3 are removed simply by detaching the cutting 4. In case that heavy materials such as sludge accumulated at a sedimentation part 8 above the valve 5 are deposited up to the pipe 7, these are removed by opening the valve 5 and the lid 6. If the sediments are solidified, the sediments are pushed out with a bar etc. from above by detaching the cutting 4. By this apparatus, the maintenance property of the pipe 3 is increased, the cost for exchanging the parts can be saved.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an overflow pipe device for a methane fermentation tank, and its purpose is to improve maintenance of the overflow pipe.

FIG. 1 shows an example of a methane fermentation tank equipped with a conventional overflow pipe. 100 is a fermenter, 101 is a submersible pump, 10
2 is an inlet, and 103 is an overflow pipe. The liquid level in the overflow pipe 103 is higher than the liquid level in the fermenter 1 by the internal pressure of the fermenter 100. In this type of overflow pipe configuration,
If left for a long period of time, scum or untreated waste will float on the upper liquid level in the overflow pipe 103, clogging the overflow pipe. Furthermore, heavy objects in the liquid settle at the inlet portion 103a of the overflow pipe 103, thereby clogging the inlet portion 103a. Therefore, it is necessary to perform regular maintenance on overflow pipes. However, with the overflow pipe configuration as described above, it is necessary to disassemble the parts that make up the overflow pipe 103, or to insert a pipe cleaner or the like from the outlet of the overflow pipe 1o3 to remove any objects that are stuck inside the pipe. However, the work is extremely troublesome1
The present invention solves these conventional drawbacks, and will be described below with reference to FIG.

1 is a fermentation container, and 2 is a lid. Reference numeral 3 denotes an overflow pipe, and a removable siphon cutter 4 is disposed at the upper end thereof, and a pulp 6 is disposed at one end of the overflow pipe 3, directly below the siphon cutter 4 described above. Furthermore, a lid 6 is detachably provided under the pulp 6. Reference numeral 7 denotes a branch pipe that is disposed between the pulp cutter 4 and the pulp 5, and is connected to the side wall of the fermenter 1. Reference numeral 8 denotes a sedimentation section formed between the branch pipe 7 and the pulp 6. Note that the other configurations are the same as those shown in FIG.

In the configuration described above, first, a spring is placed above the upper liquid level of the overflow pipe 3,
Scum and untreated waste can be easily removed by removing the siphon cutter 4. Next, heavy substances such as sludge in the liquid accumulate in the settling section 8 above the pulp 6, but there is no need to remove the sediment until it reaches the branch pipe 7, and the maintenance period is long. Become. When the pulp has accumulated up to the branch pipe 7, it can be easily removed by opening the lid 6 and the pulp 6. Even if the precipitate is solid, it can be solved by removing the siphon cutter 4 and pushing it out from above with a stick or the like. The lid 6 still reliably shuts off water even if the pulp 6 cannot be reliably closed due to foreign matter or wear, and there is no need to replace expensive pulp. In other words, the pulp 6 only needs to be watertight enough to allow the lid 6 to be easily attached.

In this way, the present invention not only provides reliable and easy maintenance, but also extends the maintenance period.

It is also highly effective in reducing costs due to the replacement of expensive parts (C).

[Brief explanation of drawings]

FIG. 1 is a sectional view of a possible methane fermentation tank, and FIG. 2 is a sectional view of a flooding device for a methane fermentation tank showing an embodiment of the present invention. 1... Fermentation tank, 2... Lid, 3...
... Overflow pipe, 4 ... Siphon cut, 6 ...
... Pulp, 6 ... Lid, 7 ... Branch pipe, 8 ... Sedimentation section. Name of agent: Patent attorney Toshio Nakao and one other person
1 Figure 01 Figure 2

Claims (3)

[Claims] (1) A fermentation container having a submersible pump etc. inside and an overflow pipe arranged on the outer wall, and a lid provided over the opening of the fermentation container, the overflow pipe having pulp disposed at the lower end. A flooding device for a methane fermentation tank, comprising a substantially inverted U-shaped tube having a removable siphon cutter at its upper end, and a branch pipe connected to a side wall of a fermentation vessel between the siphon cutter and the pulp. (2) The overflow device for a methane fermentation tank according to claim 1, wherein the overflow pipe is provided with a removable lid under the pulp. (3) The overflow device for a methane fermentation tank according to claim 1, wherein a settling section is formed between the pulp and the branch pipe.