JPH02140334A - Mixed pumping device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is directed to a mixed pumping device for semi-fluid substances such as sludge and soft mud deposited in, for example, water intakes of two submarine power plants, lakes, rivers, nine ports, etc. It is related to.

[Prior art] Conventionally, when transporting semi-liquid substances such as sludge or soft mud from a wall to a landfill, etc., it has been transported by tamp truck, or when the transport distance is relatively short, it has been carried out by dredging from a quay or 116". A mixed pumping device was installed near the site, and a discharge pipe was installed on the 71+ or on land to pump the mixture.

[Problems to be solved by the invention] However, truck transportation is inefficient as it is intermittent and returns empty, and conventional mixed pumping equipment only blows compressed air across the width into the pumping pipe via an ejector. Depending on the nature of the sludge or soft mud, it may be necessary to handle pipes with large resistance, but as the transport distance increases, the compressed air injection pressure must be increased. The discharge pressure significantly exceeded 6 kgf/Cm', and it was difficult to continue stable and efficient operation.

[Means for Solving the Problems] In order to solve these problems, the present invention provides a mixed pumping device for sludge, soft mud, and other semi-liquid materials, which combines a relay tank and a screw. It consists of a conveyor, a pressurized feeder, a compressed air supply device that supplies pressurized air to the subsequent pressurized pipe, and an ejector.

[Function] In the present invention, a centrifugal pump or a screw pump is used as a pressurized tweeter, and the drawback that a centrifugal pump or a screw feeder alone cannot discharge a constant amount because the discharge rate varies depending on the pressure is solved by combining a screw conveyor and a screw pump. This system is supplemented by a combination of a pressure feeder and compressed air injection, making it possible to maintain a nearly constant discharge amount even when pressure fluctuates, making it possible not only to use it as a mixed pumping device, but also for long-term use. It can also be used as a relay booster for long-distance transportation.

Embodiments] Hereinafter, embodiments of the present invention will be described based on aspect I4.

FIG. 1 shows one embodiment of the present invention, (a) is a side view, (a) is a side view, (a) is a side view;
b) is a plan view.

In Fig. 1, 1 is a relay tank, 2 is a screw conveyor, 3 is a pressurized feeder, 4 is a check valve, 5a is a discharge pipe on the artificial side, 5b is a discharge pipe on the outlet side, and 6 is an ejector. .

Next, the operation in the embodiment of the present invention will be explained.

First, the transported goods stored in the relay hopper 1 pass through the screw conveyor 2 by driving the screw conveyor 2, and then are energized by the pressurized feeder 3 connected to the discharge [1] of the screw conveyor 2, and then reversed. It goes via the stop valve 4 to the discharge pipe 5b. Here, compressed air from a compressed air supply device (not shown) is blown into the ejector 6 attached to the discharge pipe 5b.

As a result, the transported material such as sludge or soft mud flows through the discharge pipe in a so-called plug flow state in which lumps of the transported material and air lumps are arranged alternately in the discharge pipe 5. transported. The following are normal transportation conditions.

However, when the dredging location changes, the specific gravity and moisture content of the transported materials change, resulting in a temporary increase in piping resistance, or the transportation distance changes, forcing the transport over longer distances than before. In some cases, as shown in Figure 1, a centrifugal pump or screw pump is used as the pressurized ejector, so the transported material can be discharged quantitatively, and the ejector then blows compressed air to stabilize the plug.・Flow is formed and stable mixed pumping can be achieved.

[Effects of the Invention] As described above, according to the present invention, a pressurized feeder is provided at the discharge end of the screw conveyor, and compressed air is blown into the back of the feeder by an ejector. Even if the transportation distance increases and the transportation conditions deteriorate, stable mixed pumping with fixed quantity supply can be achieved.

[Brief explanation of the drawing]

FIG. 1 shows an embodiment of a mixed pumping device according to the present invention,
FIG. 1(a) is a side view, and FIG. 1(b) is an inside view. 1... Relay tank, 2... Screw conveyor, 3... Pressurized tweeter, 4...
...Check valve, 5a...4J [Advancing pipe (inlet side), 5b... Antagonizing pipe (outlet side), 6... Ejector. Patent applicant: Ube Industries, Ltd.

Claims (1)

[Claims] (1) A mixed pumping device for sludge, soft mud, and other semi-liquid substances, which includes a relay tank, a screw conveyor installed below the relay tank, and a pressurizer connected to the screw conveyor discharge port. A mixed pressure feeding device comprising a pressure feeder, a compressed air supply device and an ejector provided in a pressure feeding pipe on the discharge side of the pressure feeder.