JPS6012599B2 - Solids collection device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an apparatus for separating and collecting solids from a solid-containing fluid, and more particularly to an apparatus for removing sludge deposited at the bottom of a waste liquid hold-up tank in a nuclear power plant.

When a large amount of radioactive sludge accumulates in waste liquid hold-up tanks at nuclear power plants, tank maintenance becomes difficult. It is an object of the present invention to provide a device for sucking and collecting solid matter such as sludge in this tank at any time. That is, the present invention includes a jet pump that sucks fluid containing solids and sends it to a vertical cyclone in the form of a closed container, a solids discharge port provided at the bottom of the main body, and a fluid take-off pipe opened near the ball center inside the main body. a vertical cyclone in the form of a closed container, a collecting container detachably connected to the solid matter discharge port, and a feeding means for sending fluid from the fluid take-out pipe to the jet pump as a driving fluid for the jet pump. A bottle collection device for solids is characterized by the following features:

The device of the present invention is preferably portable, so that it can be taken to any location when required to collect solid matter.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described in detail with reference to preferred embodiments illustrated in the accompanying drawings.

As shown in FIG. 1, the apparatus of the present invention consists of a cyclone 1, a jet pump 2, a water pump 3, and a solids container 4 as main components.

The cyclone 1' has an inflow pipe le which is tangentially and horizontally connected to the top of the vertical outer shell la, and a solids discharge pipe lc which opens downward and connects to the solids collection container 4 at the bottom. Also provided on the internal central axis of the cyclone 1 are a liquid take-out pipe 16 whose one end is closed and whose other end extends laterally from the top of the cyclone, and an upper discharge pipe ld which is closed at the top of the cyclone. This upper discharge pipe ld is not provided in a normal cyclone, and is unique to the present invention.
4 to the discharge end 10 of the device according to the invention. The liquid discharge pipe lb is connected to the water pump 3 via a pipe 13.

The discharge side of this water pump is connected to a drive nozzle 2a of a jet pump 2 from a pipe 11 via a valve 6. Further, the discharge side of this water pump is connected to the filter 5 via piping 16 and valve 7, and the outlet side of this filter 5 is connected to valve 8,
It is connected to the pipe 11 via a pipe 17. The suction port 2b of the jet pump is connected to the suction end of the apparatus via a pipe 15, and the discharge port 2c is connected to the inflow pipe of the cyclone 1 via a pipe 12.

As shown in FIG. 2, the device E of the present invention connects the suction nozzle at the tip of the suction pipe B connected to the suction end 9 to the target tank D.
Return pipe C inserted into the sludge inside and connected to the discharge machine Q'
is used by closing it in tank D.

Its effect will be described next.

Water pressurized by the water pump 3 passes through the pipe and enters the drive nozzle 2a of the jet pump 2, driving the jet pump.

Then, a negative pressure is generated at the jet pump suction port 2b, and the accumulated solids in the tank D are sucked into the water and other liquids through the suction nozzle A and the suction pipe B. The water ejected from the drive nozzle 2a and the tank water containing the deposited solids sucked into the suction port 20 merge to form the discharge port 2c and the pipe! 2 and is ejected into the cyclone 2 from the inflow pipe e.

Since the inflow pipe e is closed in the tangential direction, a swirling flow is generated within the cyclone, and the solid matter is separated to the outer circumference by the action of the centrifugal force.

The solids fall downward while rotating and enter the solids collecting container 4 through the solids discharge pipe c.

Water (no solid matter) in the thoracic region of the cyclone turtle is discharged from the liquid outlet tube ear b and the upper discharge tube turtle d. The water coming out of the liquid taker tube turtle b is sucked into the water pump 3. The water that exits the upper outlet pipe d passes through the return pipe C and returns to the original tank D.

Since this device is a closed system, the same amount of water that enters from outside the system comes out.

Therefore, the total volume of solids and water sucked from tank ○ and the volume of water will be equal to each other. Therefore, the water level in tank D does not change. If the position of the suction nozzle A is moved by an appropriate method (for example, manually) and the solid matter on the bottom of the tank D is sucked, only the solid matter can be transferred into the solid matter collection container 4 without changing the tank water level due to the above-mentioned action. Can be collected.

If there are solids that cannot be separated by the cyclone turtle (for example, very fine particles with a specific gravity close to that of water), valves 7 and 8 are opened to allow a portion of the flow to pass through the filter 5 and capture it.

The specific size of the shape of one example of the actual device according to the present invention, the properties of the post-processing substance handled in this specific example device, the processing conditions such as concentration to flow rate and flow rate, and the processing results are shown below.

The maximum inner diameter of the cyclone was 30, and the physical height was 90. The inner diameter of the throat of jet pump 2 was 18.3, and the length was 230. The water pump 3 was designed with a height of 28 hours and a flow rate of 2.2. .

Tank D with a diameter of 2.8h and a height of 100mm has a particle size of 100mm.
The 200 fee also remained even after the 3-leg, 5-bar sand diving was canceled.

When I operated the above-mentioned device using this as a processing material~
The concentration of sand is approximately 2 from muzzle A to piping base 5 via suction pipe B.
0% fresh water is sucked into the jet pump 2 at a flow rate of 1.8 h and a flow rate of 4.8 h, and a cyclone is generated from the pipe 2 at the outlet of this jet pump at a flow rate of 1.4 m.s. Kawako was introduced. From the liquid extraction pipe b of Cyclone Taka, the flow rate was 1.4 m no s, the flow rate was 2.2 h, and only fresh water reached the water pump 3 ~ Also, the flow rate was 1.4 m
A flow with a flow rate of 2.2 mm and a flow rate of 2.2 mm was sent from the water pump to the drive nozzle 2a of the jet pump 2.

On the other hand, from the upper discharge pipe 3d of the cyclone tatami to pipe 1, the flow rate is 1.
．． 8-force nozzle "Only fresh water that was completely separated by the cyclone was returned. Above we have explained the case where water and solids are sucked in from the suction end 9. Even if the pump is completely blocked due to some kind of trouble, the water pump will continue to operate without any problems because the water circulates in the order of 3 → il → 2 → 12 → 1 → 13 → 3.

Also, when only air is sucked from suction nozzle A, the sucked air floats up inside the cyclone and is taken out from the top.
is discharged from.

Since the water circulates in the order of 3 → 11 → 2 → 12 → 1 → 13 → 3, the water pump can be operated without any problem. Utilizing this effect, it is also possible to suck air containing dust, separate the dust with a cyclone, and collect it in the cyclone.

When the container 4 or filter 5 is full of solids, the valve can be closed, removed, and disposed of at any desired location. As described above, according to the present invention, since the device is a closed system, the same amount of suction is discharged.

Therefore, when sucking sediment from the tank, the tank water level does not change. Therefore, there is an effect that no secondary wastewater is generated and there is no need to control the water level in the tank. Furthermore, the water pump will operate normally regardless of what is being aspirated (gas or liquid) and even if the suction pipe is blocked. Therefore, it is easy to handle and can be used even when there is extremely little water and air is mixed in. Since the suction port is connected to the solid matter collection container through a simple passageway, there is little clogging and even large solid matter can be sucked.

Finally, store solids in an easily removable container or filter.
It is easy to dispose of it later because it can be collected inside.

The present invention can be applied not only to the removal of sludge from hold-up tanks in nuclear power plants, but also to the suction collection of sediment from sedimentation basins, the suction construction of sediment at the bottom of waterways, and the suction collection of airborne dust. .

[BRIEF DESCRIPTION OF THE DRAWINGS] Fig. 1 is a system diagram of a preferred embodiment of the device of the present invention, and Fig. 2 is an elevational view showing the arrangement when the device of the present invention is used. Cyclone, 8a... Outer shell, lb...
...Liquid take-out pipe lc...Solid discharge pipe t Stove d...The upper discharge pipe is also connected e...Inflow pipe 2... ・Jet pump, 23...Drive nozzle, 2b...
Suction port, 2c...Discharge port 3...Water pump~
Turtle...solid matter collection container~ 5...filtration, 6,77
8... Valve, 9... Suction end " Tatami 0... Discharge machine, 12, Tortoise 3, Mother turtle 8 Quantity 5, q6, i71...
···Piping. Figure i Figure 2

Claims (1)

[Claims] Equipped with a jet pump that sucks fluid containing solids and sends it to a vertical cyclone in the form of a closed container, a solids discharge port provided at the bottom of the main body, and a fluid take-out pipe and a fluid discharge pipe that open near the axis inside the main body. A vertical cyclone in the form of a closed container, a collection container detachably connected to the solid matter discharge port, and a feeding means for sending fluid from the fluid take-out pipe to the jet pump as a driving fluid for the jet pump. solid matter collection device.