JPS6347958B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a pipe for transporting a gaseous fluid containing dust.

Conventionally, gas fluid transport pipes containing dust have had the disadvantage that dust accumulates on the inner wall surface of the pipe during use, reducing the effective inner diameter and increasing fluid friction, resulting in a reduction in transport capacity. Therefore, in order to restore transport capacity, it was necessary to suspend use and clean the inside of the pipe, which resulted in disadvantages such as a reduction in operating efficiency and the need for a large amount of manpower.

In view of the above, this invention prevents dust from accumulating on the pipe wall, and therefore does not reduce transport capacity.
Another object of the present invention is to provide a gas fluid transport pipe that does not require cleaning inside the pipe.

The gist of the invention is a gas fluid transport pipe formed by a double pipe having a gap between an inner pipe and an outer pipe, in which pressurized water flows into the inner pipe from the connection direction of the inner pipe. An appropriate number of small holes are drilled in the inner tube,
A water supply pipe that supplies pressurized water between the inner pipe and the outer pipe is connected to the transport pipe, and a drain pipe is connected to the inner pipe, and the pressure water flows into the inner pipe through the small hole of the inner pipe, and the inner pipe is connected to the transport pipe. It is configured to form a uniform water film flowing along the circumferential direction on the inner circumferential surface of the tube.

Therefore, when pressurized water is supplied from the water supply pipe to the gap between the inner pipe and the outer pipe, water flows into the inner pipe through the small hole in the inner pipe, and at this time, water is uniformly distributed on the inner circumferential surface of the inner pipe. Since a water film is formed, even if dust is contained in the gas fluid transported within the inner pipe, the dust is washed away by the water film and is prevented from accumulating on the pipe wall.

Hereinafter, illustrated embodiments of the present invention will be described.

FIG. 1 shows a sectional view of the transport pipe, and FIG. 2 shows its AA sectional view. This transport pipe is formed by a double pipe having a gap between an inner pipe and an outer pipe. That is, each tube body 1, 2, 3, etc. is formed into a double tube by fixing flanges 4 to both ends of inner tubes 1a, 2a, 3a and outer tubes 1b, 2b, 3b, respectively.
Each tube body is connected to each other by a flange 4. A suitable number of small holes 5 are scattered on the walls of the inner tubes 1a, 2a, and 3a, and water flows into the inner tube from the tangential direction of the inner tube 1a etc. through the small holes 5. The holes are formed in a substantially tangential direction of the inner circumferential surface of the inner tube so that water forms a substantially uniform water film along the inner wall surface of the inner tube 1a, etc. Reference numeral 6 denotes a water supply pipe connected to the outer pipe 1b, etc., the other end of which communicates with a water tank (not shown), etc., and is configured to supply water at a predetermined pressure to the gap between the inner and outer pipes. 7 is a drain pipe, and outer pipe 1
b etc. in an airtight manner and connected to the inner pipe 1a etc.,
Formed so that water that has entered the inner pipe can be drained,
The lower end is opened in the water seal tank 8, and the water that overflows from the upper end of the tank 8 is formed to be discharged to the outside of the system.

Next, the operation of the gas transport pipe of the present invention will be explained. Pressure water is supplied through the water supply pipe 6 to the gap between the inner pipe 1a, etc. and the outer pipe 1b, etc., and flows into the inner pipe 1a, etc. through the small hole 5. Since the small hole 5 is bored almost tangentially to the inner circumferential surface of the inner tube, pressure water flows through the inner tube 1.
Water flows into the inner tube from the tangential direction and flows along the circumferential direction of the inner circumferential surface of the inner tube 1 due to the action of centrifugal force, so that an almost uniform water film is formed along the inner wall surface of the inner tube 1a, etc. be done. After forming a water film, the water flows down and flows into the water seal tank 8 through the drain pipe 7, overflows from the upper part of the water seal tank 8, and is discharged to the outside of the system. In this state, when gas containing dust is flowed into the pipe, a water film is formed on the inner peripheral surface of the inner pipe 1a, so the dust is washed away by the water film, and the dust is not deposited on the pipe wall. Prevented. Therefore, the effective inner diameter does not decrease, and the fluid friction of the gas fluid does not increase due to the decrease in the effective inner diameter.
Additionally, since there is no need to clean the inside of the pipe, operational efficiency is increased and labor can be saved. Furthermore, since water injection is not used, there is no mist entrained in the gas fluid, and there is almost no need for protruding parts such as spray nozzles on the inner wall of the pipe, so there is no shadow area and dust accumulation in the dead zone. There are advantages such as no

Incidentally, the drain pipes can be installed as one unit, and the transport pipe can also be constructed integrally instead of being assembled as in the above-mentioned embodiments. Third
4, the thickness of the wall of the inner tube is thinner than that of the previous embodiment, and it is difficult to drill a small hole directly tangentially to the inner tube 11, so a nozzle member 12 is separately welded. Another embodiment is shown, which is installed by the above-mentioned method. The nozzle member 12 has a cylindrical shape, and is provided with an L-shaped small hole 13 that intersects the axial direction and the radial direction.
The inner end of the small hole 13 is formed to open tangentially to the inner peripheral surface of the inner tube 11. Note that it is desirable that the nozzle member 12 be formed so that the amount of protrusion from the inner circumferential surface of the inner tube 11 is minimized. Also in this embodiment, water supplied to the gap between the inner tube and the outer tube passes through the nozzle member 12 to the inner tube 1.
1, and a uniform water film is formed along the inner peripheral surface of the inner tube 11.

Note that the direction in which the pressure water flows into the inner pipe may be approximately tangential, and the present invention can be applied as long as the direction allows the pressure water to flow along the inner wall surface of the inner pipe due to the action of centrifugal force. The effect is sufficient.

Furthermore, the outflow direction of the pressure water from the small hole is changed within the range of 45° to 135° with respect to the direction of the center axis of the tube, so that the pressure water flowing into the inner tube flows in a spiral along the inner circumferential surface of the inner tube. This also allows a water film to be effectively formed on the inner circumferential surface of the inner tube.
Dust accumulation can be effectively prevented.

Note that the transport pipe of the present invention is used by being provided in a part of a gas fluid transport path.

As explained above, according to the gas fluid transport pipe of the present invention, when a gas containing dust is flowed, the dust is washed away by the water film on the inner wall of the pipe.
It is possible to prevent dust from accumulating on the wall surface. Therefore, it is possible to eliminate the trouble of cleaning the inside of the pipe and the reduction in transportation capacity.

[Brief explanation of the drawing]

The figures show an embodiment of the present invention, FIG. 1 is a sectional view of a transport pipe, FIG. 2 is a sectional view taken along line A-A in FIG. 1, and FIGS. 3 and 4 show another embodiment. , FIG. 3 is an enlarged sectional view of the main part, and FIG. 4 is the nozzle member 12.
FIG. 1, 2, 3...tube, 1a, 2a, 3a, 11
...Inner pipe, 1b, 2b, 3b...Outer pipe, 5, 13
...Small hole, 6...Water pipe.

Claims (1)

[Scope of Claims] 1. A transport pipe formed by a double pipe having a gap between an inner pipe and an outer pipe, and provided in a part of a gas fluid transport path, the inner pipe and the outer pipe A water supply pipe that supplies pressurized water between the two is connected to a part of the transport pipe, and an appropriate number of small holes are bored in the inner pipe so that the pressure water flows into the inner pipe from a tangential direction of the inner pipe. and a drain pipe for discharging water that has flowed into the inner pipe is connected to the inner pipe so as to form a uniform film of water flowing in the circumferential direction on the inner peripheral surface of the inner pipe. A gas fluid transport pipe characterized by: