SU755724A1 - Apparatus for condensing hydraulic mixture being transported in the pipelines - Google Patents

Description

The invention relates to the field of hydraulic transport and can be used in various industries to thicken the slurry transported through pipelines.

A device for thickening the slurry, containing a thickener connected to the transport pipeline bakg, equipped with a screw installed in its lower part, and a pipeline for draining the drained water [1].

The disadvantage of this device is that it does not provide., Sufficient efficiency of the thickening process due to the presence of the auger, which is a large local resistance to the flow of the slurry.

It is also known a device for thickening the slurry transported through pipelines, comprising a housing mounted above the transporting pipeline with a drainage pipe and a separator installed in the housing.

body element (2). The separating element of this device is made in the form of a rotating perforated drum filled with granular material. ™

2

The disadvantages of this device are the complexity of the design, the possibility of clogging of the separating element, which reduces the efficiency of the thickening process, and sharp pressure fluctuations. In transient conditions that adversely affect the operation of the device.

The aim of the invention is to simplify the design of the device, increasing the efficiency of the thickening process and preventing sudden pressure fluctuations during transient conditions.

The goal is achieved by the fact that in the proposed device, the housing is equipped with nozzles for supplying compressed air, and the separating element consists of a partition wall in which there are through axial holes and interconnecting with each other and with the mentioned nozzles · radial and axial channels, and perforated tubes fixed on the bottom the surface of the partition is coaxial with the axial channels. .

FIG. 1 shows the described device, a general view; in fig. 2 a view along arrow A in FIG. one; on fig.Z

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section bb in fig. 2; in fig. 4 shows a section B-B in FIG. 2

The device includes a housing 1 installed above the transport pipeline 2 connected to a ground pump 3. The pump 3 has a suction pipe 4. The pipeline 2 is equipped with a check valve 5, and in the case there is mounted a partition wall b, in which there are radial 7, axial 8 channels and through axial holes 9.

Through axial channels 8, the radial channels 7 communicate with perforated tubes 10, which through holes 11 communicate with the lower cavity of the housing. Radial channels 7 are communicated with. supplying compressed air nozzles 12, on which are installed the locking bodies 13. The axial through holes 9 communicate the lower and upper cavities of the housing 1, to the upper part of which is attached the drain nozzle 14, on which the locking element 15 is mounted.

The device works as follows.

The ground pump 3 through the suction pipe 4 from the suction sump (not shown) sucks the pulp and feeds it into the delivery transport pipe 2. After the pump has developed 3 nominal head and flow, the check valve 5 will open and the slur will begin to move through the pipe 2. With the passage of the section in which case 1 is installed, part of the mixture will flow into the last one, and part will continue to move along pipeline 2. Moreover, due to the fact that case 1 is placed above the pipeline, the lower cavity of the case will receive more liquefied pulp compared to Tel'nykh small particles of solid material, since the larger particles are usually transported to the bottom of the pipeline. Since the casing has a large cross section and a large volume, the pulp entering the lower cavity will lose velocity, which will contribute to the separation of solid particles from water.

Compressed air from a source of compressed air (not shown in the drawing) is supplied to the same cavity of the housing through perforated tubes 10 with openings 11, as well as radial 7, axial 8 channels and nozzles 12; slightly more than the pressure of the working medium in the casing 1. The mass of the liquefied pulp will be mixed with air, which will further reduce the proportion of the hydraulic mixture. This circumstance, on the one hand, will promote the intensive separation of the solid fraction from the liquid, and on the other hand, gas bubbles (air) in the upper part of the body through the axial through holes 9 will involve only water, i.e. A water-air mixture will flow into this part of the body, and a stream of condensed pulp will be transported through pipeline 2.

A certain amount of air can get into the latter, but this circumstance creates a positive effect.

From the upper part of the housing 1, the clad water through the nozzle 14 can be diverted to a sump (not shown in the drawing) for reuse.

In this device completely can. the issue of preventing sudden pressure fluctuations during transient conditions, which often arise in pressure hydrotransport systems and cause serious accidents, should be resolved.

As mentioned above, in a stream of condensed pulp moving along the transport pipeline 2, there will always be a certain amount of air that it will carry out from the lower cavity of the housing 1. This allows the flow moving through the transport pipeline to be aerated, which leads to a decrease in the overall reduced elastic modulus system, thereby reducing the speed of propagation of the wave and, accordingly, the excess pressure during transient conditions.

In addition, the device can perform the function of a hydraulic shock absorber caused by the sudden shutdown of the pump 3 and the closing of the check valve 5 (it should be noted that it is in this case that maximum overpressures occur in hydrotransport systems). The damping of the increased wave (overpressure) in the housing 1 will be due to the fact that it always contains a certain amount of air (air is the best damping element), as well as the increased wave through the nozzle 14 and the shut-off element 15 will also spread to the receiving sump.

In the device, shut-off organs (in their quality can be used valves, taps, etc.) 13 are provided for regulating the pressure and flow of compressed air, and the drain nipple 14 for regulating the amount (flow) of bleached water.

Claims (1)

Claim A device for thickening hydraulic pipelines transported via pipelines755724 si containing a housing installed above the transport pipeline with a drainage pipe and a separating element mounted in the housing, characterized in that, in order to simplify the design, increase the efficiency of the thickening process and prevent sudden pressure fluctuations during transient conditions, element co. .I stand from the partition, in which the through axial holes are made and interconnected with each other and with the above-mentioned nozzles, radial and axial channels, and perforated tubes fixed on the lower surface of the partition coaxially with the axial channels. .