JPS6354609B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a transport pipe that is particularly effective when transporting various types of granular materials such as pulverized coal in large quantities over long distances using air or other gases.

When powder and granules are transported by a high-pressure, high-concentration transportation device such as a blow tank, a portion of the powder and granules adhere to and accumulate on the inner walls of the transport pipes, increasing pressure loss in the pipes and increasing energy consumption. This effect tends to be more pronounced as the transportation distance becomes longer.

In order to prevent this, plug transport with intermittent cutting has conventionally been carried out, but intermittent transport cannot be sustained in long-distance pipelines, so this alone is not a solution.

In powder material transport pipes, over the entire length of the pipe,
A so-called "air slide" in which a porous material is installed at the bottom or inside wall of a pipe is well known, but this cannot be applied to high-speed transport pipes because it must be installed along the entire length of the upper transport pipe. It is uneconomical and difficult to apply to sealed pipes.

In the present invention, blind porous tubes of a predetermined length made of ceramic or sintered metal are arranged at a predetermined interval on the bottom of the horizontal portion of a large-diameter transport pipe, and these porous tubes are fixed to the bottom of the tube with a fluid filler. To provide a transportation pipe that is easy to manufacture and economical, in which gas is ejected continuously or intermittently into each porous tube through a control valve to reduce pipe bottom flow and pipe resistance. It is something.

To explain the transport pipe according to the present invention with reference to the diagram,
Reference numeral 1 indicates a horizontal or gently inclined transport pipe, and reference numeral 2 indicates a porous tube, which has a predetermined length and is a so-called blind tube with both ends 2' closed.
and a control valve 9 are provided.

One or more porous tubes 2 are arranged in parallel near the bottom of the transport pipe and along the entire length of the transport pipe.

3 is a filler such as resin or cement, preferably non-shrinkable cement (for example, Denki Kagaku Kogyo Co., Ltd.)
Denka CSA formulation) is better.

In the present invention, the porous tube 2 is disposed by simply inserting the porous tube into the transport tube 1, and furthermore, when injecting the filling, the porous tube is only temporarily fixed and then injected. Production is extremely simple.

Furthermore, the level of the porous tube 2 within the tube can be determined by the amount of filler injected, and at the same time, the area of the vent portion 4 of the porous tube can be easily changed.

That is, although the porous tube 2 has ventilation holes on the entire surface, by injecting the filling material 3, the portion 5 buried in the filling material is inevitably closed, and the opening portion is indicated by reference numeral 4.
Only the ventilation section shown in .

The transport pipe of the present invention is connected to a cut-out nozzle of a blow tank, and the powder flows through the pipe 6.

On the other hand, the porous tube 2 is connected to another gas supply source and ejects gas from the ventilation portion 4 on the upper surface intermittently or in conjunction with the powder flow.

As a result, the pipe resistance against the powder and granules is reduced, preventing the granules from accumulating at the bottom of the tube, and thus improving the energy consumption required for transportation.

Note that the gas supplied to the porous tube is arbitrary regardless of the type of transportation gas, and safety gas may be ejected to increase the safety of transportation, or it may be connected to a booster pipe to link with powder supply. Can be done.

Further, the number, diameter, air permeability, etc. of the porous tubes are arbitrary and can be freely combined depending on the purpose.

In the present invention, the blind tube with both ends closed is arranged over the entire length of the bottom of the transport pipe, but it is not necessary to make it continuous. It is preferable to arrange them in correspondence to each pipe, and to adjust the gas flow rate supplied to each pipe using the regulating valve 9.

Furthermore, the porous tubes within the transport pipe may be arranged in a staggered manner, or the porous tubes may be covered with a canvas sleeve using a fixing fitting or the like.

Of course, even in such a case, the fixing fitting can be fixed together with the porous tube using the filler.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view of the transport pipe of the present invention, Fig. 2 is a longitudinal cross-sectional view thereof, Fig. 3 is a cross-sectional view of another embodiment, and Fig. 4 is a longitudinal cross-sectional view of a case in which porous tubes are not connected. be. 1...transport pipe, 2...porous tube, 3...
... Filling material, 4... Ventilation opening surface portion.

Claims (1)

[Claims] 1. A plurality of blind porous tubes with both ends closed and connected to a gas supply source via a control valve are installed along the entire length of the transport pipe at the bottom of the transport pipe in a substantially horizontal portion of the large-diameter transport pipe. At the same time, a fluid filler is injected into the bottom of the transport pipe and solidified to bury the bottom of the porous tube by a required amount, and the amount of gas supplied to the porous tube is adjusted individually. Piping for large-volume long-distance transportation.