JPS5833785Y2 - Pulsating flow smoothing device for slurry-containing liquids - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a pulsating flow smoothing device for a slurry-containing liquid.

When powdered catalysts produced in chemical processes are mixed with water and flowed, they are treated to make them as harmless as possible.

That is, fluids generated in this type of waste, such as slurry-containing liquids, are subjected to appropriate treatments such as neutralization, filtration, precipitation, and aeration to become treated water, which is then discarded or reduced.

Therefore, various pump devices are used to transport the slurry-containing liquid from each stage of the process to the next process, and in particular, when pumping the slurry-containing liquid, a diaphragm is used to prevent wear and clogging. A pump is preferably used.

As is well known, diaphragm pumps achieve pumping action by pulsating a thin membrane made of rubber, Teflon, or the like.

Therefore, the slurry-containing liquid fed to the discharge side inevitably forms a pulsating flow.

In order to achieve smooth processing in the next stage, it is preferable to smooth out this pulsating flow, and pulsating damping means such as an air chamber or an accumulator have usually been employed.

When an air chamber is used, there is a drawback that, according to the general installation method, for example, if a liquid containing a floating slurry is used, the inside of the air chamber is rapidly filled with the floating slurry and becomes immediately unusable.

Another problem is that even if the air chamber is cleaned, slurry particles, which are the object of liquid feeding, remain in the air chamber, making it impossible to effectively smooth the pulsating flow.

On the other hand, even if an accumulator is used instead of this air chamber method, it will be more expensive than a normal air chamber method, and if a metal bellows type accumulator is used, the service life will be short or the slurry will stick. It has been pointed out that this causes poor operation, and that when a plug-type accumulator is used, the bladder material is rubber, which limits various conditions such as the type of liquid that can be handled.

Therefore, as a result of various studies, the inventor of the present invention decided to install an air chamber below the slurry feed pipe connected to the discharge side of the diaphragm pump, and to create an air chamber with a sufficient discharge volume for one stroke of the diaphragm pump. communicating the slurry feed pipe and the air chamber with a pipe member having a volume for receiving the slurry,
By filling the air chamber to a predetermined level with a liquid that can prevent slurry from entering or settling, the surplus of the slurry-containing liquid discharged from the diaphragm pump will only enter halfway into the pipe member. It has been found that even if the slurry is floating, it is possible to effectively prevent the slurry from entering the air chamber, thereby solving the above problem.

Therefore, an object of the present invention is to smooth out the pulsating flow in a pump device that handles slurry-containing liquid containing floating slurry, etc., and to smooth out the pulsating flow without allowing the floating slurry, etc. to enter the air chamber that serves as a pulsating buffer. An object of the present invention is to provide a device for smoothing the pulsating flow of a slurry-containing liquid, which can be transported to a slurry-containing liquid and manufactured at a low cost.

In order to achieve this purpose, in the present invention, a throttle valve is provided in the slurry feed pipe connected to the discharge side of the pump device that intermittently feeds the slurry-containing liquid, and the slurry feed pipe is connected to the discharge side of the pump device. A branch pipe portion having a volume larger than the volume of the slurry feed pipe is connected to a part of the slurry feed pipe extending from the side to the throttle valve, and this branch pipe portion is extended downward,
The lower end of the branch pipe is connected to the lower end of an adjacent air chamber, and the branch pipe and the air chamber are filled with a liquid capable of preventing slurry from mixing or settling to a predetermined level. The air chamber is further characterized in that the upper space of the air chamber is filled with gas at a predetermined pressure.

In this case, it is preferable that a liquid supply pipe and a liquid discharge pipe capable of preventing slurry from mixing or settling are connected to the upper end and lower end of the branch pipe portion, respectively, via on-off valves.

Next, the apparatus for smoothing the pulsating flow of a slurry-containing liquid according to the present invention will be described in detail by citing preferred embodiments and referring to the accompanying drawings.

In FIG. 1, reference numeral 10 indicates a diaphragm pump, and a slurry feed pipe 14 equipped with a stop valve 12 is connected to the discharge side of the diaphragm pump 10.

An air chamber 18 having a gas filling valve 16 at the top is arranged below the slurry feed pipe 14, and the bottom of the air chamber 18 and the slurry feed pipe 14 are connected through a pipe member 20. I'll keep it.

The volume of the pipe member 20 is configured to be large enough to sufficiently absorb the overpressure within the slurry feed pipe 14 caused by the throttle valve 12.

Next, a pipe member 2 branched from the slurry feed pipe 14
A pulsating flow smoothing fluid supply system 2 in which a liquid filling and cleaning valve 22 is attached to a slurry feed pipe 14 facing the upper opening of the pulsating flow smoothing fluid supply system 2
A pulsating flow smoothing fluid supply system 28 equipped with a liquid filling and cleaning valve 26 is also connected to the lower opening of the pipe member 20.

The device for smoothing the pulsating flow of a slurry-containing liquid according to the present invention is constructed as described above, and its operation and effects will be explained next.

First, in use, the liquid filling and cleaning valve 26 is opened to fill the air chamber 18 with mother liquor from the pulsating flow smoothing fluid supply system 28 via the pipe member 20.

Since the tube member 20 is connected to the bottom of the air chamber 18, the water levels of the mother liquor in the air chamber 18 and the tube member 20 are maintained at the same level.

The mother liquor is used to mix the powdered catalyst and allow it to flow through, and is preferably clear water.

In this case, by using a mother liquor having a specific gravity higher than that of the slurry, sedimentation of the floating slurry is prevented, and intrusion of the slurry into the air chamber 18 is reliably prevented.

In addition, by using a liquid with a high specific gravity that does not contain gas, such as fluorine oil, in place of the mother liquor, it is possible to prevent slurry with a high specific gravity from being mixed into the liquid.
Its sedimentation can be prevented.

Next, the gas filling valve 16 is opened to fill the space 30 of the air chamber 18 that is not filled with mother liquid with gas at a predetermined pressure.

When the diaphragm pump 10 is energized, a slurry-containing liquid is intermittently fed to the slurry feed pipe 14, and this slurry-containing liquid once flows into a pipe member 20 branched from the slurry J-feed pipe 14.

When the slurry-containing liquid is gradually accumulated in the pipe member 20, the pulsating flow of the continuously supplied slurry-containing liquid is smoothed and the slurry-containing liquid is transferred to the next process via the throttle valve 12.

That is, when the slurry-containing liquid has sufficiently flowed into the tube member 20 and, on the other hand, the slurry-containing liquid is further fed via the diaphragm pump 10, the throttle valve 12 is fixedly opened, and therefore, the throttle valve 12 is fixedly opened. Since more than a certain amount of slurry-containing liquid is not led out from the valve 12, overpressure generated by the excess slurry-containing liquid is transmitted into the pipe member 20.

However, this overpressure is reduced by the tube member 20 having a volume sufficient to absorb it.

On the other hand, due to the reduced pulsating pressure, the liquid in the pipe member 20 and the air chamber 18 is pressed and moved up and down, and eventually the gas in the space 30 is also pressed according to the pressure, but the pulsating pressure as described above The static pressure is once reduced by the pipe member 20, and since the air chamber 18 has a large diameter, the pulsating flow can be effectively smoothed without pressing the gas to any extent.

It goes without saying that if the gas pressure is adjusted according to the type of slurry-containing liquid, the pulsating flow can be effectively smoothed out at all times.

When cleaning the air chamber 18, switching from the pulsating smooth fluid supply system 24, 28 to a cleaning water supply system (not shown) and opening the liquid filling cleaning valves 22 and 26 will supply cleaning water. At this time, since the floating slurry does not enter the air chamber 18 at all, it is extremely easy to clean it, and there is no problem when performing the next pulsating flow smoothing action.

Further, even when the diaphragm pump 10 is stopped, there is no possibility that the slurry-containing liquid will enter the air chamber 18 due to the action of the mother liquid described above.

As described above, although the device of the present invention has an extremely simple configuration, it is possible to effectively smooth out the pulsating flow that occurs when feeding a slurry-containing liquid. Plan 1 had practical effects that contributed to improving the overall reliability of Plan 1 by preventing gas intrusion, extending the gas filling interval, and significantly reducing the labor and time required for maintenance and inspection.

Although the pulsating flow smoothing device for slurry-containing liquid according to the present invention has been described above, the present invention is not limited to this embodiment, and various improvements and design changes can be made without departing from the spirit of the invention. Of course it will be done.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a main part of a pulsating flow smoothing device for a slurry-containing liquid according to the present invention. 10...Diaphragm pump, 12...
- Throttle valve, 14...Slurry feed pipe, 16...
...Gas filling valve, 18...Air chamber, 20...Pipe member, 22...Liquid filling cleaning valve, 24...Pulsation Fluid supply system for flow smoothing, 26...Liquid filling and cleaning valve, 28...
... Fluid supply system for smoothing pulsating flow, 30 ... Space section.

Claims (2)

[Scope of utility model registration request] (1) A throttle valve is provided in the slurry feed pipe connected to the discharge side of the pump device that intermittently feeds slurry-containing liquid, and the slurry is fed from the discharge side of the pump device of this slurry feed pipe to the throttle valve. An air chamber in which a branch pipe section having a volume larger than the volume of the slurry feed pipe is connected to a part of the pipe, the branch pipe section extends downward, and a lower end of the branch pipe section is provided adjacent to the branch pipe section. The branch pipe section and the air chamber are connected to the lower end, and the inside of the branch pipe section and the air chamber are filled to a predetermined level with a liquid capable of preventing the slurry from mixing or settling, and the upper space of the air chamber is filled with a gas at a predetermined pressure. A pulsating flow smoothing device for a slurry-containing liquid, characterized in that it is filled with: (2) Utility model registration Scope of claim 1 In the pulsating flow smoothing device for a slurry-containing liquid as described in claim 1, a liquid capable of preventing slurry from being mixed in or settling is installed at the upper end and the lower end of the branch pipe through on-off valves, respectively. A device for smoothing the pulsating flow of a slurry-containing liquid by connecting a supply pipe and a discharge pipe.