JPS5946680B2 - Water catcher for methane fermentation system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a water collector for condensation water in gas piping in a methane fermentation system.

A methane fermentation system consists of a combination of a methane fermentation tank, a gas tank, and gas consumption equipment, etc., but the gas piping that connects them is significantly different from normal city gas piping, as fermented gas has a higher water content. The problem is that condensation water tends to accumulate in the pipes.

That is, the methane fermentation tank is normally controlled and operated at a temperature higher than the outside air, such as 30 to 40°C or 50 to 60°C, depending on the type of methane bacteria.

Therefore, the fermentation gas discharged from the methane fermentation tank contains water at approximately the saturated water vapor pressure at the above-mentioned control temperature.

This condensation water is cooled to outside temperature and condenses in the gas tank or in the piping leading to the gas consumption equipment, and the dew water flows into the piping and accumulates at the lowest point, blocking the piping.

As a result of the above results, there were drawbacks such as an abnormal increase in the gas pressure in the methane fermentation tank, or pulsations in the gas pressure in the gas consumption equipment, which could cause, for example, fluctuations in the flame of the burner. .

To compensate for this drawback, there is a method to remove water by installing a desiccant in the piping, but if the methane fermentation tank is of a practical scale,
Since a large amount of desiccant is required and it takes a lot of effort to replace it, it is not suitable.

Therefore, a water catcher that automatically and continuously removes dew condensation water is sometimes used.

To explain the structure of the above water catcher with reference to Fig. 1, 1 is a methane fermentation tank, 2 is a gas tank, and 3 is a water catcher installed at the bottom of the flexure in the fermentation gas piping leading to the methane fermentation tank 1 or gas tank 2. The water intake port 4 is a water seal pipe that is vertically connected to the water intake port 3 of the water catcher, and the inside of both the water intake port 3 and the water seal pipe 4 of the water catcher is inside the methane fermentation tank 1. It is filled with fermentation gas connected to

5 is a water catcher main body, and its cross-sectional area is much larger than the cross-sectional area of the water sealing tube 4 (as designed).

6 is water for water sealing, and is filled up to the overflowing lower part.

In the above water catcher, the water level in the water seal tube 4 is pushed down by the pressure of the fermentation gas pressurized by the gas tank 20 function, and the difference between the water level and the water level of the water seal water 6 in the water catcher main body 5 is , is the water pressure equivalent of the above fermentation gas pressure.

From this, the height of the water intake port 3 of the water catcher is determined by the fermentation gas pressure.

On the other hand, the water intake port 3 is connected to the methane fermentation tank 1 and the gas tank 2.
Due to the need to provide the pipes at the lower part of the pipes between the pipes, the position where the gas pipes of each device are drawn out is limited by the height of the water intake port 3.

To further explain the position of the gas pipe for each device, in the case of a gas tank 2 or a water seal type, a lower position is considered to be more advantageous due to structural reasons for pulling out the gas pipe from the bottom of the device. .

For the above reasons, a water catcher with a low height water intake has been desired.

The present invention satisfies these needs and provides a low intake water catcher that satisfies the purpose of the water catcher: eliminating dew condensation in piping and releasing gas when abnormal gas pressure occurs.

An embodiment of the present invention will be described below with reference to FIG.

11 in FIG. 2 is a water intake port of a water catcher connected by a branch joint from the lowest part of the pipe between the methane fermentation tank 12 and the gas tank 13, and 14 is a water seal connected vertically from the water intake port. It is a pipe, and its cross-sectional area is designed to be much smaller than the cross-sectional area of the first water-catching chamber 16 constituting the water-catching main body A.

Reference numeral 15 designates water sealing water filled in the first water collection chamber 16, and reference numeral 11 designates an overflow port for keeping the water sealing water 15 at a constant water level.

Reference numeral 18 denotes a water sealing pipe vertically connected to the second water capturing chamber 19, one end of which opens into the water sealing water 20 within the water capturing chamber 19, and the other end of which opens into the water sealing water 20 of the first water capturing chamber 16. It is connected to the overflow port 11.

Reference numeral 21 denotes a water overflow port for keeping the water level of the water sealing water 20 in the second water collection chamber 1.9 constant.

Similar to the water seal pipe 18, the water seal pipe 22 has one end opened into the water seal water 24 in the water overflow port 21 and the third water collection chamber 23, and the other end is connected to the water overflow port 21.

25 is an overflow port of the water control water 24 which is opened to atmospheric pressure.

26 is a gas pressure display/replenishment water pipe consisting of a transparent tube with one end opened into the water sealing water 15 of the first water collection chamber 16 and the other end open to the atmosphere; 21 is a gas pressure display/supply water pipe; Dust removal from the pipe 26 is also a cover to prevent water evaporation inside the pipe, with a small hole 27 in the center of the cover.
′ is provided.

In addition, the length below the water surface of the water sealing water 15, 20, 24 of each of the water sealing pipes 14, 18, and 22 is the same as that of the water intake port 11.
It is designed to be slightly longer than the water pressure equivalent of the maximum pressure used.

Further, the gas pressure display/replenishment water pipe 26 has one end connected to the water seal pipe 1.
It opens at the same water depth as 4, and the total length of the pipe is designed to be slightly longer than the water pressure equivalent length of the maximum pressure used above.

Next, the principle of operation of the water catcher described above will be explained.

The fermentation gas generated in the methane fermentation tank 12 is pressurized in the gas tank, and the gauge pressure is P at the water intake port 11 of the water catcher.

mA (assuming that there is 1. In this case, the water surface position in each water seal tube is all P below the water surface of the water seal water.

/ It has been pushed down to 3 fights. Accordingly, the pressure in the space above the water surface of the first water capture chamber 16 is P.

-Po/3, that is, 2Po/3, and the pressure in the space above the water surface of the second water capture chamber 19 is 2Po/3-Po/3, that is, P.

/3.

The pressure in the space above the water surface of the third water capture chamber 23 is Po/3-Po/3
In other words, the pressure is equal to the outside air.

By the above-mentioned operation, when normal operating gas pressure is applied to the water intake port 11 of the water catcher, the water seal tube can be stably used in a state where the water level in the water seal tube is lowered to a certain position.

Next, the water condensed in the fermentation gas piping collects at the water intake port 11 of the water catcher at the lowest part of the pipe flexure.

The dew water flows down through the water seal pipe 14 and mixes into the water seal water 15.

The amount of mixed dew water overflows from the overflow port 17, and the water seal pipe 1
8 and mixed into the water sealing water 20.

Similarly to the above, the mixed amount sequentially overflows from the overflow port 21.

From this, the result is that the dew water collected at the water intake port 11 overflows from the overflow port 25.

When an abnormal pressure exceeding the maximum operating pressure is applied to the water intake port 11, the water surface of the water seal tube 14 is pushed down, and the fermentation gas becomes bubbles from the lower open end of the water seal tube 14 and floats up in the temperature water seal water 15. , enters the upper space of the first water capture chamber 16.

The water surface of the water seal tube 18 in the washing room is pushed down by the amount of fermentation gas that has entered the gap, and as described above, the fermentation gas becomes bubbles from the lower open end of the water seal tube 18 and floats up in the water seal water 20. 2 Water capture chamber 1.9 enters the upper cavity.

Furthermore, in the same manner, the fermentation gas sent to the third water capture chamber 23 gap is released into the atmosphere from the water overflow port 25.

From this, if abnormal pressure is applied to the water intake port 11,
The fermentation gas is released from the water seal pipe 14 through each chamber into the atmosphere from the overflow port 25, and this release is continued until the pressure is reduced to the maximum working pressure by releasing the fermentation gas.

On the other hand, one end is opened in the first water capture chamber 16 at the same water depth as the water seal tube 14, and the other end is opened to the atmosphere, and the first water capture chamber 16
The upper wall is airtight (if a transparent tube is installed, the distance between the water surface in the water seal tube 14 and the water surface in the transparent tube is equivalent to the water pressure equivalent of the fermentation gas pressure). A scale was engraved on the tube and used as a gas pressure indicator.

Furthermore, in order to replenish water sealing water that is reduced due to evaporation and dissipation in each water capture chamber, the open end of the transparent tube to the atmosphere was used as a replenishment water inlet, and the transparent tube was used as a gas pressure display and water supply pipe 26. .

As mentioned above, the water catcher of the present invention has the feature that dew condensation water in the piping can be continuously and automatically removed even when the fermentation gas piping to be constructed is located at a very low ground clearance and even when the piping is installed at a very low ground height. have

In other words, when using a conventional water catcher, the piping must be installed at a height above the ground equivalent to the water pressure equivalent of the fermentation gas pressure, unless an underground structure is provided. It also has the advantage that it can perform the same function as a conventional water catcher in piping.

Furthermore, if a transparent tube is provided in the first water collection chamber, the fermentation gas pressure can be displayed, and there is no need to install an expensive micropressure gauge, which saves on piping material costs. .

In the embodiment of the present invention, the interior of the water catcher is configured with three chambers, but the number of chambers is theoretically not limited as long as it is an integer of two or more.

In this case, it goes without saying that the height of the water inlet, which increases the number of chambers, can be designed to be low.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of a conventional water catcher, and FIG. 2 is a cross-sectional view of a water catcher showing an embodiment of the present invention. 11...Water intake, 14...Water seal pipe, 16...First water collection chamber, 19...Second
Water capture room, 23...Third water capture room, 25...
・Overflow port, 26...Gas pressure display and makeup water pipe,
A... Water catcher body.

Claims (1)

[Scope of Claims] 1. A methane fermentation system is constituted by a methane fermentation tank, a gas tank, fermentation gas consumption equipment, etc., and a water catcher body connected in the middle of piping between the methane fermenter and the gas tank has a plurality of water catching chambers. A water catcher for a methane fermentation system, in which the overflow port of each chamber is operated in connection with the water seal pipe of the next chamber, and the pressure applied to the water seal pipe is equally reduced by the number of chambers. 2 The water catcher body has one end open to the atmosphere and the other end opened to the first
Claim 1: A gas pressure display/replenishment water pipe is submerged in the water sealing water of the water capture chamber for the same length as the water sealing pipe, and is slightly longer than the water pressure equivalent length of the maximum gas pressure used for the fermentation gas. A water catcher for the methane fermentation system described above.