WO2009070992A1

WO2009070992A1 - Pipeline conveying discharge-assisting method

Info

Publication number: WO2009070992A1
Application number: PCT/CN2008/071408
Authority: WO
Inventors: Runian Lu
Original assignee: Runian Lu
Priority date: 2007-11-30
Filing date: 2008-06-23
Publication date: 2009-06-11
Also published as: CN101173734B; CN101173734A

Abstract

A pipeline conveying discharge-assisting method involves exerting power disturbance to a liquid-solid mixing material conveyed in a pipeline, to prevent solid grain in the liquid-solid mixing material from depositing and stopping moving, and hence to improve conveying efficiency of the pipeline and prolonging limited conveying distance. Preferably, a small pipeline (3) is fixed inside the pipeline, and multiple small holes (4) are opened on the small pipeline (3). High-pressure gas or water is ejaculated from the small holes (4) on the small pipeline (3). Preferably, a ripple soft pipe (9) is axially fixed in a conveying pipeline. Pressure is applied and relieved to the ripple soft pipe (9) intermittently to expand an d contract the ripple soft pipe (9). Preferably, at least a vortex generator (10) is mounted axially on the pipeline, and the spiral acting force generated by the vortex generator (10) can make the liquid-solid mixing material flow spirally.

Description

Pipeline assisted drainage method

The present invention relates to a method of pipeline assisted discharge, and more particularly to a method of assisting drainage of a liquid-solid mixture in a pipe. Background technique

The long-distance transport of liquid substances by pipeline method is a common method of transportation. However, when the liquid transported by the pipeline contains solid particles, the solid particles will precipitate in the pipeline, causing the solid particles to contact the inner wall of the pipeline, generating frictional resistance, consuming the transport energy, and allowing the pipeline to transport a certain distance, the solid particulate matter in the pipeline. The movement will be stopped and precipitated, so that the effective distance of the pipeline is reached.

For example, in the civil works of land reclamation, the high-pressure pump is used to transport the sand-solid mixture to a long distance. In the conveying pipe, the sand particles sink under the action of gravity, and the friction with the inner wall of the pipe produces a large frictional resistance. After a large amount of transportation energy is consumed, and the pipeline reaches a certain distance, the sand solid particles in the pipe will stop moving and precipitate, which will reduce the efficiency of pipeline transportation and shorten the limit transportation distance. Summary of the invention

SUMMARY OF THE INVENTION It is an object of the present invention to increase the efficiency of a liquid-solid mixture containing solid particles as it passes through a pipeline and to extend the ultimate transport distance.

Technical Solution of the Invention: A pipe transport assisting and discharging method, which is characterized in that it exerts a power disturbance to a liquid-solid mixed material in a pipe to prevent precipitation of solid particles in the liquid-solid mixture and stop the occurrence of movement.

Preferably, at least one small pipe is installed in the conveying pipe, and the small pipe is opened at a certain distance Small holes that emit high pressure gas or water through small holes in small pipes.

Preferably, at least one corrugated hose is axially mounted within the delivery conduit, intermittently pressurizing and depressurizing the corrugated hose to cause expansion and contraction of the corrugated hose.

Preferably, at least one vortex generator is axially mounted on the conveying pipe, and the spiral force generated by the vortex generator causes a spiral flow of the liquid-solid mixture.

The invention has the effects of improving the transportation efficiency of the pipeline transportation and prolonging the limit transportation distance, and is embodied as follows:

1. When the liquid substance containing solid particles is transported by the pipeline method, the high-pressure gas or water sprayed from the bottom to the top is injected into the pipeline to prevent the solid particles from being precipitated in the pipeline, so that the contact between the solid particles and the inner wall of the pipeline is reduced. The frictional resistance is reduced, and the transportation energy consumption is small, so that the efficiency of the pipeline transporting material is increased, and the limit transportation distance is prolonged.

2. When the liquid substance containing solid particles is transported by pipeline, the corrugated hose is expanded by intermittently pressing and releasing the corrugated hose by installing one or more corrugated hoses in the conveying pipe. Shrinkage, throwing up the solid particles to be precipitated, reducing the contact between the solid particles and the inner wall of the pipe, reducing the frictional resistance, and reducing the transportation energy consumption, thereby improving the efficiency of the pipe conveying material and prolonging the limit transportation distance.

3. When the liquid substance containing solid particles is transported by the pipe method, the liquid-solid mixture material is spirally flowed by installing a jet vortex generator in the conveying pipe and discharging the high-pressure gas or water by the jet vortex generator. The solid particles to be precipitated are taken up, the contact between the solid particles and the inner wall of the pipe is reduced, the frictional resistance is reduced, and the transportation energy consumption is small, so that the efficiency of transporting the material of the pipe is increased, and the limit transportation distance is prolonged. DRAWINGS

Figure 1 is a longitudinal sectional view of a pipe for conveying liquid and a small pipe for conveying high-pressure gas or water therein Figure 2 is a partial enlarged view of the small tube of the high pressure gas or water of the portion I of Figure 1.

Figure 3 is a cross-sectional view of the pipe of Figure 1 A-A for conveying liquid and the small pipe therein.

Figure 4 is a longitudinal section of a pipe for conveying liquid and a corrugated hose capable of intermittently compressively expanding and depressurizing and contracting therein

Figure 5 is a partial enlarged view of the II-part corrugated hose of Figure 4

Figure 6 is a cross-sectional view of the pipe B-B for conveying liquid and the corrugated hose therein

Figure 7 is a longitudinal section of a pipe for conveying liquid and a vortex generator therein for rotating the liquid-solid mixture

Figure 8 is a partial enlarged view of the pipe and vortex generator for conveying liquid of the portion III of Figure 7

Figure 9 is a cross-sectional view of the pipe and vortex generator for transporting liquid from Figure C to Figure 7

Figure 10 is a cross-sectional view taken along line D-D of Figure 9

Among them: 1. Conveying pipe for the transportation of liquid-solid mixture; 2. Joint, connecting the pipe for inputting high-pressure gas or water; 3. Small pipe, conveying high-pressure gas or water; 4. Small hole, spraying high-pressure gas or Water; 5. Liquid in the conveying pipe; 6. High-pressure gas or water in the small pipe; 7. High-pressure gas or water sprayed; 8. Pressure gauge; 9. Corrugated hose; 10. Vortex generator; , eject high pressure gas or water; 10a. inner tube; 10b. outer tube; 12. high pressure gas or water sprayed. detailed description

Example 1

Referring to Figure 1-3, one or more small pipes 3 are installed in the conveying pipe 1, and the small pipes 3 are provided with a joint 2 of high-pressure gas or water, and the high-pressure gas or water 6 is connected through the joint 2, and the small pipes 3 are spaced at a certain interval. The distance is opened by a small hole 4 through which high-pressure gas or water 7 is emitted, and the injected high-pressure gas or water 7 causes the solid particles in the liquid-solid mixture conveyed in the pipe to be motivated by power and cannot be deposited. The liquid in the pipe is piped to a greater distance. This method is adopted: (1) Processing method for processing small pipes 3 for conveying high-pressure gas or water: The material is selected from the inner diameter Φ25~Φ40 (less than 1/20 times the inner diameter of the conveying pipe) and the seamless steel pipe with a wall thickness of 3mm~3.5mm, cutting Small steel pipe, the length of each small steel pipe is 30mm longer than the length of each conveying pipe, and the inner and outer teeth of each small steel pipe are respectively twisted, and the thread length is 30mm. (2) Open one or more small holes 4 at a certain distance on the small pipe, as shown in Figure 2. (3) Calculate the starting position of the installation of the small pipe 3 of high pressure gas or water: If the limit distance of the pump to the sand liquid is N kilometers, choose the distance from the pump 1/3N to the small pipe of high pressure gas or water. 3 The starting position of the installation. (4) Starting from the installation point of the transfer pump and the conveying pipe 1, starting from the distance of 1/3N of the conveying pump, each section of the conveying pipe 1 is installed, and a small pipe 3 of high-pressure gas or water is installed at the same time; The conveying pipe has a small opening on the bottom side thereof, and the small pipe 3 of high-pressure gas or water is connected to the outer side of the conveying pipe by the joint 2, and the opening is sealed by welding; the joint 2 is connected to the high-pressure gas or Water on the pump. (5) The end point of the installation of the small pipe 3 for conveying high-pressure gas or water is the same as the end point of the installation of the conveying pipe 1. (6) At the starting point of the installation of the small pipe 3, a pressure gauge 8 is installed on the conveying pipe. (7) The input pressure of high pressure gas or water is 1.5 times the liquid pressure at the starting point. (8) The input flow rate of high pressure gas or water is 1/12 times the flow rate of the liquid delivered by the pump. (9) The small tube 3 for conveying high-pressure gas or water can be divided into several sections, each section being independent, and the cross-sectional area of each small section 3 is 1.5 to 2.5 times the total area of the small holes on the small section of the section.

Comparative Example: Pipe diameter 600mm, pumping pump power 1200kw 'cinch suction boat, pumping sediment mixture, sand particle diameter 0.1~5mm, content: mud (particle size less than 0.1mm) amount 10%, sand amount 25%, The water is 65%, the conveying height difference is 5 meters, and the normal conveying distance is about 2.0~2.5km. After adopting this method, the conveying distance can reach 4.0~4.5km.

Example 2:

Referring to Fig. 4-6, one or more corrugated hoses 9 are installed in the conveying pipe 1, and the corrugated hose 9 is expanded and contracted by intermittently pressing and releasing the corrugated hose 9, the corrugated hose 9 Expansion and contraction alternate, The solid particles in the liquid-solid mixture conveyed in the pipeline are subjected to dynamic disturbance and cannot be deposited, so that the liquid in the pipeline is transported to a greater distance by the pipeline.

The method is as follows: (1) The material of the corrugated hose is a retractable hose with an inner diameter of Φ40~Φ50 (less than 1/15 times the inner diameter of the conveying pipe), and the length of each hose can be 10~ of the length of the conveying pipe. 15 times. (2) Calculate the starting position of the corrugated hose: If the normal conveying distance of the pump to the sand liquid is Ν km, choose the distance from the pump 1/3N to the starting position of the corrugated hose installation. (3) The conveying pipe and the corrugated hose are installed synchronously. (4) Corrugated hose 9 The end point of the installation is the same as the end point of the delivery pipe 1 installation. (5) At the starting point of the installation of the corrugated hose 9, a pressure gauge 8 is installed on the conveying pipe. (6) The input pressure of high pressure gas or water is 1.5 times the liquid pressure at this starting point. (7) The corrugated hose can be divided into several sections, each section being independently pressurized and relieved.

Comparative Example: Pipe diameter 600mm, pumping pump power 1200kw 'cinch suction boat, pumping sediment mixture, sand particle diameter 0.1~5mm, content: mud (particle size less than 0.1mm) amount 10%, sand amount 25%, The water is 65%, the conveying height difference is 5 meters, and the normal conveying distance is about 2.0~2.5km. After adopting this method, the conveying distance can reach 3.5~4.0km.

Example 3:

Referring to Fig. 7-9, the vortex generator 10 is connected to the conveying pipe, and the spiral force of the liquid-solid mixture is generated by the disturbance of the spiral force generated by the vortex generator 10, thereby improving the efficiency of the pipe conveying material and limiting the transportation. The distance is extended.

The method is as follows: (1) manufacturing a vortex generator 10, which is formed by two tubes of the same length and different diameters, the inner tube 10a and the outer tube 10b, and the two ends are welded integrally with the flange. The inner tube is mounted with a nozzle 11 at a certain distance along the circumference. The angle between the outlet direction of the nozzle 11 and the liquid flow direction is 15 to 20 degrees, and then rotated 15 to 20 degrees in the lateral direction; the inner diameter of the inner tube 10a and the inner diameter of the delivery tube 1 The same size, the annular cross-sectional area between the outer tube 10b and the inner tube 10a is more than 10 times the sum of the outlet areas of all the nozzles 11. (2) Calculate eddy current generation Starting position of the installation: If the normal distance of the pump to the sand liquid is N kilometers, the distance from the pump 1/3N is selected as the starting point of the vortex generator installation. (3) Install a vortex generator every 50 meters along the conveying pipe. (4) At the starting point of the installation of the vortex generator 10, a pressure gauge 8 is mounted on the conveying pipe. (6) The high pressure gas or water 12 input pressure is twice the liquid pressure at the starting point.

Comparative Example: Pipe diameter 600mm, pumping pump power 1200kw 'cinch suction boat, pumping sediment mixture, sand particle diameter 0.1~5mm, content: mud (particle size less than 0.1mm) amount 10%, sand amount 25%, The water is 65%, the conveying height difference is 5 meters, and the normal conveying distance is about 2.0~2.5km. After adopting this method, the conveying distance can reach 3.0~3.5km.

Claims

Claim

A method for pipe-assisted drainage, which is characterized in that it exerts a power disturbance to a liquid-solid mixture in a pipe to prevent precipitation of solid particles in the liquid-solid mixture and stop the occurrence of movement.

2. The pipeline transportation assisting and discharging method according to claim 1, wherein at least one small pipe is installed in the conveying pipe, and the small pipe has a plurality of small holes at a certain distance, and is ejected through the small hole in the small pipe. High pressure gas or water.

3. The pipe transportation assisting and discharging method according to claim 2, wherein the small pipe is divided into several sections, each section is independently connected with high pressure gas or water, and the cross sectional area of each small pipe is small on the small pipe. The total area of the holes is 1.5 to 2.5 times.

4. The pipeline delivery assisting method according to claim 1, wherein at least one corrugated hose is axially installed in the conveying pipe, and the corrugated hose is intermittently pressurized and depressurized to expand the corrugated hose. And shrinking.

5. The pipeline delivery assisting method according to claim 4, wherein the corrugated hose is divided into several sections, each section is independently pressurized and depressurized, and the length of each section of the hose is 10-15 of the length of the conveying pipe. Times.

6. The pipeline delivery assisting method according to claim 1, wherein at least one vortex generator is axially mounted on the conveying pipe, and the spiral force generated by the vortex generator causes the liquid-solid mixture to be spirally generated. flow.

7. The pipeline transportation assisting and discharging method according to claim 6, wherein the vortex flow generator is formed by two tubes of the same length and different diameters, the inner tube and the outer tube, and the inner tube diameter. Same diameter as the delivery tube, The two ends are respectively welded integrally with the flange, and a plurality of nozzles are mounted on the inner tube, and high pressure gas or water is emitted through the nozzle.

8. The pipe transport assisting and discharging method according to claim 7, wherein an angle between an outlet direction of the head and a liquid flow direction is 15 to 20 degrees and then 15 to 20 degrees in a lateral direction.

9. The pipeline delivery assisting method according to claim 7 or 8, wherein the inner diameter of the inner tube is the same as the inner diameter of the delivery tube, and the annular cross-sectional area between the outer tube and the inner tube is the outlet area of all the nozzles. And