JPH0691300A - Apparatus for separating gas from material in transport pipe - Google Patents

Abstract

PURPOSE:To improve the biological treatment of sludge by removing or burning harmful gas such as methane separated from dredged sludge. CONSTITUTION:A sludge transport pressure pipe 1, 6 with a required diameter is divided in an optional position into an upstream pipe and a downstream pipe. The two pipes 1, 6 are placed coaxially at required interval. A tapered outer pipe 3 is installed on the periphery of the facing ends of the pressure pipes 1, 6 to connect them. Gas contained in sludge running in the upstream pipe is led to a gas separation chamber 2 in the outer pipe 3 through slits or holes to separate the gas from sludge. An ignition cock 9 and an air introduction pipe 10 are attached on the outer pipe 3 as necessity requires. Combustible gas such as methane introduced in the gas separation chamber 2, after being mixed with air, is burned, and the combustion gas is discharged into the downstream pipe.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas body separating apparatus for a pipe flow product.

[0002]

2. Description of the Related Art A large amount of sludge containing organic substances is deposited and accumulated on the sea bottom of a port, the bottom of rivers, lakes, dams, etc., forming so-called sludge, which is a pollution problem. Therefore, a method of dredging this sludge (sludge) has been proposed. The sludge dredging is performed by using a sludge lift pump or a jet pump.

[0003]

When organic matter is contained in sludge settled at the bottom of the seabed, lake bottom, etc., it undergoes anaerobic fermentation and combustible harmful gas such as methane gas is generated. Since this seed gas has an extremely lighter specific gravity than the settled sludge, it floats as bubbles and is released into the atmosphere. However, if the sludge is contained in the sludge in a fine state without forming bubbles due to the weight of the sludge, when the sludge is dredged in this state, this harmful gas is separated from the sludge and a large amount is temporarily released to the atmosphere. It also causes the next pollution problem.

An object of the present invention is to remove the gas in the dredged sludge and harmful gas such as methane gas by separating them from the sludge or by burning them.

[0005]

SUMMARY OF THE INVENTION The present invention has been made to achieve the above object, and divides a sludge pressurizing pipe having a required diameter into an upstream side and a downstream side at an arbitrary position on the way, and pressurizing both sludge pressurizing pipes. The pipes are arranged opposite each other on the same axial center with a required gap, and the tapered outer pipes are integrally arranged on the outer circumferences of the separation points of both sludge pumping pipes, and the inner peripheral surface of the upstream sludge pumping pipes. The gist of the present invention is that the gas body flown along with the gas is introduced into the gas body separation chamber in the outer tube through the gap or the small hole to separate the sludge from the gas.

[0006]

[Function] When sludge dredged by a jet pump or other pump is sent through the pressure-feeding pipe, an outer pipe is arranged on the outer periphery of the pressure-feeding pipe in the middle of the pressure-feeding pipe, and a gas body separation chamber is provided on the outer periphery of the pressure-feeding pipe Therefore, the gas body such as methane gas sent along with the sludge along the inner peripheral surface of the pressure feed pipe is easily separated from the inner peripheral surface of the pipe and is introduced into the gas body separation chamber. Sludge and the like are sent as they are into the next pressure feed pipe. Separated from sludge,
The methane gas, etc. introduced into the gas body separation chamber is directly led to the outside through an outer tube for treatment, or after the gas body is separated, it is mixed with air and burned, and then the combustion gas is again fed into the next pressure feed tube. Discharge and send with sludge. As a result, harmful gas such as methane gas in the dredging sludge is removed or rendered harmless, so that the sludge can be easily treated in the subsequent step.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A gas body separating apparatus for in-line flow products of the present invention will be described below with reference to the illustrated embodiments. In the figure, reference numeral 1 denotes a sludge pressurizing pipe for dredging sludge accumulated on the seabed or a conveying pipe for conveying the dredged sludge to a destination without touching the atmosphere, and has a required diameter. And this sludge pressure feed pipe 1
As shown in FIG. 1, the gas body separation chamber 2 is integrally formed by slightly bulging in the middle of the process. This is a sludge pumping tube 1
It is also possible to fit the outer tube 3 having a conical shape to the outer periphery of the above.

The gas body separation chamber 2 is a conical outer tube 2
Is fitted to the outer periphery of the rear end portion of the sludge pressurizing pipe 1 and slightly protrudes into the outer pipe 2. A large number of small holes H are formed in the outer periphery of the protruding portion 1A and the gas body separation chamber 2 is reached. A gas guide pipe 4 having a smaller diameter and a shorter tubular shape is arranged in the immediately preceding sludge pressurizing pipe 1, and is fixed to the sludge pressurizing pipe 1 via a slightly twisted mounting plate 5, whereby the sludge pressurizing pipe 1 is flowed. A swirl flow is applied to the inner surface of the sludge pipe.

A sludge pressurizing tube 6 having the same diameter is arranged on the same axis center with a required gap O provided between the plunge part 1A of the sludge pressurizing tube 1 and the tip of the sludge pressurizing tube 6 is the rear end edge of the outer tube 3. Join and.

Further, a gas collecting plate 7 is provided so as to project on the inner peripheral surface of the tip of the sludge pumping pipe 1 and on the downstream side of the small hole H, whereby sludge is flowed along the inner peripheral surface of the sludge pumping pipe 1. The gas body inside is collected and surely introduced into the gas body separation chamber through the small hole H.

The outer tube 3 is provided with an inspection window 8 through which the inside of the gas body separation chamber 2 is seen, an air introduction tube 10 having an ignition plug 9 and a valve 11.

Therefore, the device constructed as described above is inserted into a part of the pipe line for feeding the dredged sludge under pressure. When the dredged sludge is sent through the pipe, especially when air is blown and the sludge is pumped together with the air flow, the air and the gas bodies in the sludge are separated from the solid matter of the heavy sludge having a large specific gravity by the hydrodynamic action. The sludge is pressure-fed along the central portion of the sludge pressure-feeding pipe, and the gas body having a low specific gravity is pressure-fed along the inner peripheral surface. Then, when the gas body reaches the plunge portion 1A of the sludge pumping pipe, it is introduced into the gas body separation chamber 2 provided at the outer peripheral portion of the pipe through the small hole H bored in this. At this time, since the swirl flow is given to the gas body by the gas guide pipe 4 and the mounting plate 5 in the sludge pressurization pipe immediately before the gas body separation chamber, the gas body smoothly passes through the small hole H. To the gas body separation chamber 2. Since the interior of the chamber is equipped with a spark plug 9 and an air introduction pipe 10, the concentration of combustible gas such as methane in the chamber is measured, and the air necessary for completely burning it is operated by operating the valve 11. It is supplied via the supply pipe 10. The flammable gas body is burned by the ignition of the spark plug 9 in the gas separation chamber.

The gas in the sludge pressure-fed through the sludge pressure-feeding pipe 1 has a molecular weight of 28:32:16 when comparing nitrogen gas, oxygen gas and methane gas. Therefore, the specific gravity ratio is N2: O2: CH4 = 7: 8: 4, and the specific gravity of methane gas is the smallest. Therefore, the methane gas is concentrated on the outermost side of the inner peripheral surface of the sludge pumping pipe 1 and has the highest concentration. As described above, this high-concentration methane gas is introduced into the gas body separation chamber through the small holes H, is mixed with air appropriately, and is ignited and burned by the spark plug. Erupted into the interior. This high temperature,
The high-speed combustion gas gives an accelerating force to the flowed material in the pipe and heats it to evaporate the water content in the pressure-fed sludge to reduce the water content. As a result, harmful combustible gas such as methane gas is efficiently burned, so that it can be converted into harmless carbon dioxide gas and water.

The gas body burned in the gas body separation chamber 2 merges again with the sludge that is pressure-fed in the rush portion and is pressure-fed in the next sludge-pressure feed pipe 6. At this time, as described above, the combustion gas pressure is applied. Acceleration and heating takes place. Then, after being pressure-fed to a predetermined position through the pipe 6, a solid-gas separation device is provided at the end of the pipe, whereby the solid content of sludge and the gas are separated.

FIG. 2 shows a different embodiment, in which an outer pipe 3 having a divergent taper shape is connected to the end of the upstream sludge pumping pipe 1 in which a gas guide pipe 4 is mounted via a mounting plate 5. At the same time, a required gap O is formed between the upstream end of the sludge pressurizing pipe 1 and the downstream sludge pressurizing pipe 6, which is provided oppositely.
The tip end of the downstream side pressure feeding pipe 6 is inserted into the tapered outer pipe 3 to be integrated. Therefore, the gas separation chamber 2 is formed between the outer pipe 3 and the outer peripheral surface of the downstream sludge pressurizing pipe 6 inserted into the outer pipe.

Therefore, the gas body in the sludge flowed in the sludge pressurizing pipe 1 on the upstream side is along the inner peripheral surface of the pipe. Therefore, when it reaches the end of the sludge pumping pipe 1, it is connected to it,
The sludge flows gradually along the inner peripheral surface of the outer pipe 3 that spreads to the downstream side, is guided into the gas body separation chamber 2, and the sludge is sent into the sledro pressure feed pipe 6 facing the next, so that gas such as methane gas Definitely separated. The end of the outer tube 3 of the gas body separation chamber 2 is closed, and the gas body discharge pipe 12 is connected to the end portion, so that the separated gas body is naturally guided to the outside of the outer tube 3, It is supplied to a tank or a gas combustion device connected to the pipe 12.

The separated gas body contains oxygen gas and nitrogen gas in the air in addition to combustible harmful gas such as methane gas generated by anaerobic fermentation of sludge. To separate the mixed gas body, the gas body discharge pipe 12 is used.
Is connected to a gas separating device 20 as shown in FIG. 3, where the difference in specific gravity is used to separate and remove gas for each type.

An example of the gas separator 20 is shown in FIG. In this, a pipe 12 is tangentially connected to the center of a main body container having a required volume to supply a gas body into the container so as to give a swirling flow, and a partition plate 24 is staggered in the container. The exhaust pipes 21, 22 and 23 are connected so that the flow paths of the introduced gas are lengthened and separated according to the specific gravity ratio of the gas bodies and taken out for each type. A discharge pipe 21 for discharging methane gas having the lightest specific gravity is provided at the upper part of the container, a discharge pipe 23 for discharging condensed water at the lower end, and a lower part of the container and separated from condensed water. The exhaust pipes 22 for taking out the air are connected to such positions.

According to the present invention, the gas body separation chamber is formed by bulging a part of the gas in the middle of the pressure feeding pipe by utilizing the property that the gas is flown along the inner peripheral surface of the pressure feeding pipe. Only the gas body in this sludge is naturally separated from the sludge and introduced into the gas body separation chamber. Therefore, even if methane gas or the like is contained in the sludge during dredging, since the harmful gas is removed from the sludge discharge port, the sludge can be easily treated. Further, since no other power is used to separate the gas from the sludge, there is an advantage that the structure is simple.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing an embodiment of a gas body separating apparatus for in-pipe flow product of the present invention.

FIG. 2 is a sectional view of the different embodiment.

FIG. 3 is a cross-sectional view of a gas separation device.

[Explanation of symbols]

 1 Sludge pressure feed pipe 2 Gas separation chamber 3 Outer pipe 6 Sludge pressure feed pipe 9 Spark plug 10 Air introduction pipe H Small hole

Claims (3)

[Claims] 1. A sludge pressurizing pipe having a required diameter is divided into an upstream side and a downstream side at an arbitrary point on the way, and both sludge pressurizing pipes are arranged opposite to each other on the same axial center and at a required interval.
A tapered outer pipe is integrally provided on the outer periphery of the separation points of both sludge pressure feeding pipes, and the gas body fed along the inner peripheral surface of the upstream sludge pressure feeding pipe is discharged through the gap or the small hole. A gas body separation device for a flow object in a pipe, characterized by being introduced into a gas body separation chamber in a pipe to separate sludge and gas. 2. Methane introduced into a gas body separation chamber by arranging a spark plug and an air introduction pipe in a tapered outer pipe integrally provided at a connection portion of both upstream and downstream sludge pressure feeding pipes. A combustible gas such as a gas is appropriately mixed with air and burned, and the burned gas is discharged to a downstream sludge pressure feeding pipe. 3. A gas body discharge pipe is connected to a tapered outer pipe integrally provided at a connecting portion of both upstream and downstream sludge pressure feeding pipes, and the gas is separated from the sludge and introduced into a gas body separation chamber. The gas body separating device for the in-pipe flowed article according to claim 1 or 2, wherein the body is led out of the outer pipe for processing.