JPS61200823A - Pressure type liquid filter - Google Patents

Abstract

PURPOSE:To perform not only filtering work within a short time but also backwashing and intermediate washing by a filter itself, by performing the peculiar arrangement combination of distribution piping and supply and discharge values, the successive operation thereof and the supply of seawater under pressure. CONSTITUTION:When pressurized seawater is introduced and usually filtered, a supply valve 8 of water to be filtered and a filtrate take-out valve 16 are opened while a backwashing supply valve 9, a backwashing drain valve 11 and an intermediate washing water withdrawal valve 18 are closed. When washing is required, the backwashing supply valve 9 and the backwashing drain valve 11 are opened while the supply valve 8 of water to be filtered, the filtrate take-out valve 16 and the intermediate washing water withdrawal valve 18 are closed. Whereupon, the pressurized liquid to be filtered sent in from a water supply pipe 4 is guided to a filter main body 1 from a second water injection pip 7 through a branched water outlet pipe 15a and a water outlet pipe 15 and reversely flowed through a filter material 2 to extract dust from the filter material 2 under the aid of the force of water pressure and reversely flowed to the branched pipes 6a, 6b of a first water injection pipe 6 along with dust and dirty water is guided from the backwashing drain valve 11 to a drain pipe 12 to be discharged from a drain port 13.

Description

DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to a pressurized liquid filter that is most suitable for filtering seawater, etc., which is supplied, for example, to the cultivation of fish and shellfish.

``Conventional technology'' It is desirable that liquids such as seawater supplied for fish and shellfish farming be passed through a filter to remove organic residues and unnecessary plankton and prepare the habitat, resulting in clear seawater. There is.

[Problem to be solved by the invention] Conventionally, however, as the filter is used, debris accumulates on the filter material and it becomes dirty, so it is necessary to clean the filter material. There are disadvantages in that a separate washer is required for cleaning, and furthermore, it requires a lot of effort.

"Means for Solving the Problem" The present invention aims to eliminate the drawbacks of the above-mentioned prior art.
A separate cleaning device is not required, and the filtration work can be performed in a short time by combining the distribution piping and supply/discharge valves unique to this application and their sequential operation, and supplying seawater under pressure. It is an object of the present invention to provide a pressurized liquid filter in which intermediate cleaning is performed within the filter itself.

``Configuration of the Invention J'' The present invention will be described in detail below based on illustrated embodiments.

FIG. 1 is an explanatory diagram showing the basic configuration of the present invention, in which 1
1 is a filter main body, in which filter media 2 are stacked and housed, and the structure is such that liquid fed under pressure is injected 3 from above and filtrate is taken out from below. The filter main body 1 has a structure similar to that of an existing pressurized filter, but the distribution piping and various supply/discharge valves attached to it are unique. The feature is that it improves the performance of pressurized filters.

In the figure, reference numeral 4 denotes a water supply pipe, and a pressure pump 5 is installed on this pipe so that the liquid to be supplied can be supplied under pressure by the operation of the pressure pump 5. The front of the water supply pipe 4 is divided into two parts, a first water injection pipe 6 and a second water injection pipe 7, and a filtered water supply valve 8 is provided at the base of the first water injection pipe 6. A backwash supply valve 9 is provided at the base of the water injection pipe 7.

Further, the first water injection pipe 6 at the end of the filtered water supply valve 8 is further divided into two branches, one branch pipe 6a is connected to the water injection port 10 on the upper part of the filter main body 1, and the other branch pipe 6a is connected to the water injection port 10 at the upper part of the filter body 1. The branch pipe 6b is connected to a drain pipe 12 via a backwash drain valve 11. Note that a discharge port 13 for dispensing liquid is formed at the tip of the drain pipe 12. A water outlet pipe 1 extending from a water outlet 14 provided at the lower part of the filter main body 1
5 is bifurcated at its tip, and one branch water outlet pipe 15a is connected to an outlet pipe 17 via a filtered water outlet valve 16 at its tip, and the filtered water outlet valve 16 is connected to the outlet pipe 17 at its tip. The above-mentioned second water injection pipe 7 is connected to the provided front outlet pipe 17.
are connected. Furthermore, the other branched water outlet pipe 15b which is divided into two branches is connected to the drain pipe 12 via an intermediate wash drain valve 18.

Incidentally, a permeate water outlet 19 is formed at the tip of the outlet pipe 17 to take out the filtered clear liquid.

Further, each of the various upper supply and discharge valves may be operated automatically or manually.

"Function" The present application is characterized by having the distribution piping and various supply/discharge valves configured as described above.The function will be explained based on the illustrated embodiment. When entering the water and performing normal filtration, open the filtered water supply valve 8 and filtered water take-out valve 16 while keeping the backwash supply valve 9, backwash drain valve 11, and intermediate wash water drain valve 18 closed. good. When the various supply and discharge valves are operated as described above, the filtered liquid pressurized by the pressure pump 5 passes through the water supply pipe 4, passes through the filtered water supply valve 8, and is filtered from the branch pipe 6a of the first water injection pipe 6. Water is sent to the container body 1. The clear seawater filtered by the filter main body 1^ passes from the water outlet pipe 15, through the filtrated water take-off valve 16, and through the take-out pipe 17, and a clear liquid can be obtained from the filtered water outlet 19. In this case, since the seawater is pressurized, the filtration action is performed quickly and in a short period of time.

Next, when filtration is repeated and the filter material 2 becomes contaminated with dirt and needs to be cleaned, the filtered water supply valve 8, filtered water take-out valve 16, and intermediate wash water drain valve 18 are closed. If the backwash supply valve 9 and the backwash drain valve 11 are left open,
The pressurized liquid to be filtered sent from the water supply pipe 4 is sent from the backwash supply valve 9 to the second water injection pipe 7, and then to the branch water pipe 15a and the water supply pipe 15.
The waste is introduced into the filter main body 1 through the filter body 1, flows backward through the filter medium 2, and with the help of water pressure, removes dirt from the filter medium 2, and with it flows back into the branch pipes 5a and 5b of the first water injection pipe 6, causing contamination. The water is led from the backwash drain valve 11 to the drain pipe 12 and then to the outlet 13
more excreted. In other words, without using a separate cleaning device for cleaning the filter body 1, the filtrate can be directly fed from the supply pipe by simply operating the installed distribution pipes and various supply/discharge valves. It is extremely easy to clean using C.

As mentioned above, it is convenient to wash the filter main body by backflowing the supplied liquid to be filtered, but it conversely contaminates the area below the filter material. Therefore, it is necessary to stop this backflow and allow the filtrate to flow down from the upper part again, so that the filtrate immediately after starting the filtration action is discharged in order to wash the lower part caused by the backflow. This is called an intermediate cleaning action, but in order to cause this action, the filtered water supply valve 8 must be closed again while the backwash supply valve 9, backwash drain valve 11, and filtered water take-out valve 16 are closed. When the intermediate wash water drain valve 18 is opened, the liquid to be filtered from the water supply pipe 4 passes through the water supply valve 8 to be filtered, passes through the first water injection pipe 6 and its branch pipe 6a, and then enters the filter main body 1.
The water is introduced to the upper part of the filter medium 2, passes through the water outlet pipe 15 and the branch water outlet pipe 15b, and is discharged from the discharge port 13 through the intermediate washing water drain valve 18 to the drain pipe 12. , completely wash the filter medium 2. When the intermediate cleaning action is completed in this way, by closing the intermediate cleaning water drain valve 1ε3 and opening the overflow water extraction valve 16, it is possible to switch to take out the filtrate from the filtrate water outlet 19 via the extraction pipe 17. This restores the state to normal filtration.

Note that the eight valves are automatic valves using solenoids, etc., and if the order of operation is set in advance, all of them will be automatically operated. In order to actually carry out this automatic sequential operation smoothly, the opening and closing timings of the eight valves are slightly shifted and the sequential operations are set.

That is, when the filtered water supply valve 8 and the filtered water outlet valve 16 are opened from the normal filtration operation state, they are closed and the backwash supply valve 9 and the backwash drain valve 11 are opened for backwashing. After opening the first backwash supply valve 9, the filtrate take-out valve 16 is closed with a slight timing shift, and then the backwash drain valve 1 is closed.
1 and then close the filtered water supply valve 8.

In other words, when the backwash supply valve 9 is initially opened with the filtered water supply valve 8 and the filtered water take-out valve 16 in the open state, the filtered water supply valve 8
A part of the liquid flows sideways from the backwash supply valve 9 and is discharged to the second water injection pipe 7, and even if the filtrate water take-out valve 16 is closed, it continues to flow to the second water injection pipe 7, so that the liquid to be filtered is is the filter body 1
This prevents abnormal pressure from being trapped inside. Then, when the backwash drain valve 11 is opened, part of the filtered liquid from the water supply pipe 4 flows back from the first water injection pipe 6 to the drain pipe 12, and when the filtered water supply valve 8 is closed in this state, the water to be filtered is supplied. All of the liquid flows back into the filter main body 1 through the backwash supply valve 9, the second water injection pipe 7 and the water outlet pipe 15 without any resistance.

If the filtered water supply valve 8 is closed first while the backwash supply valve 9 is closed, the pressure filtered liquid will not flow into the water supply pipe 4 during the timing difference until the backwash supply valve 9 is opened next. If the backwash supply valve 9 is opened, large pulsations may occur, which may damage the valves.

For the same reason, in the case of an intermediate cleaning action in which the backwash supply valve 9 and the backwash drain valve 11 are closed and the filtered water supply valve 8 and the intermediate wash water drain valve 18 are opened, the intermediate wash water drain valve 18 is opened first. If a part of the drain pipe 12 is connected to the water outlet pipe 15 and its branch pipe 15b, and then the backwash supply valve 9 is closed in sequence, seawater can be prevented from being trapped and can flow smoothly.

When restoring to the normal filtration state, the sequence of operations is to first open the filtration take-out valve 16 in the above-mentioned state and open the take-out pipe 17, and then open the intermediate wash water drain valve 18.

By manually or automatically opening and closing the valves in the above sequence, a series of operations of filtration, washing, and residual water washing can be smoothly performed by the filter itself by switching only by operating the valves.

Embodiment FIG. 2 shows an embodiment of the present invention, in which the basic configuration shown in FIG. 1 is specifically arranged, and the same members as in the basic configuration are given the same reference numerals. Moreover, although the various supply and discharge valves shown in FIGS. 1 and 2 have been described as automatic valves, the same purpose can be achieved even if the valves are operated manually.

``Effects of the Invention'' As described above, the present invention provides a pressurized liquid filtration method in which a pressurized liquid is injected from above the filter main body 1 in which the filter medium 2 is housed, and the filtrate is taken out from below. In the vessel,
The front of the water supply pipe 4, which is pressurized and fed by the pressure pump 5, is divided into two branches, a first water injection pipe 6 and a second water injection pipe 7, and the first water injection pipe 6 is provided with a filtered water supply valve 8, Also, the second water injection pipe 7
is provided with a backwash supply valve 9, the first water injection pipe 6 is further divided into two branches, one branch pipe 6a is connected to the water injection port 10 on the upper part of the filter main body 1, and the other branch pipe 6b is A water outlet pipe 15 is connected to a drain pipe 12 via a backwash drain valve 11 and extends from a lower water outlet 14 of the filter main body 1.
divides the tip into two, and connects one of the branch water pipes 15a
is connected to the take-out pipe 17 via the filtered water take-out valve 16 at its tip, and connected to the second water injection pipe 7 in front of the take-out valve 16, and the other branch water out pipe 15b
is connected to the drain pipe 12 via the intermediate washing drain valve 18, and performs rapid filtration of the liquid and backwashing of the filter body 1 by operating the various supply/discharge valves and supplying pressurized water by the pressure pump 5. Since it is now possible to perform intermediate cleaning, there is no need for a special cleaning device, and the filter itself can clean the filter material 2 using the liquid to be filtered by simply opening and closing the piping, valve arrangement, and sequential operation of the valves. Can perform a series of tasks such as cleaning and cleaning residual water.

Moreover, since the filtrate pressurized by a pressure pump is used at that time, it is possible to remove contaminants immediately during backwashing and to ensure cleaning during intermediate washing, and to perform the normal filtration action rapidly in a short period of time. This is the effect that can be achieved.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing the basic configuration of the invention, and FIG. 2 is a perspective view showing an embodiment of the invention. DESCRIPTION OF SYMBOLS 1... Filter main body, 2... Filter material, 4... Water supply pipe, 5... Pressure pump, 6... Water injection pipe, 5a,
5b... Branch pipe, 7... Second water injection pipe, 8... Filtered water supply valve, 9... Backwash supply valve, 10... Water injection port,
11... Backwash drain valve, 12 Drain pipe, 13... Outlet, 14... Water outlet, 15... Water outlet pipe, 15a, 15b... Branch water pipe, 16... Filtration Water take-out valve, 17... Take-out pipe, 18...
・Intermediate washing water drain valve, 19... Canned water outlet. Figure 1

Claims (1)

[Claims] In a pressurized liquid filter, in which pressurized liquid is injected from above the filter body where the filter material is stored, and the filtrate is taken out from below, the water supply pipe is pressurized and fed by a pressure pump. The front part is divided into a first water injection pipe and a second water injection pipe, and the first water injection pipe is provided with a filtered water supply valve, and the second water injection pipe is provided with a backwash supply valve. The tip of one water injection pipe is further divided into two branches, one branch pipe is connected to the water inlet on the top of the filter body, and the other branch pipe is connected to the drain pipe via a backwash drain valve. The water outlet pipe extending from the lower water outlet is divided into two branches, and one of the branched water pipes is connected to the outlet pipe via the filtered water outlet pipe at its tip, and the outlet pipe is connected to the outlet pipe via the filtered water outlet pipe at its tip, and the outlet pipe is connected to the outlet pipe at the tip of the branch outlet pipe through the filtered water outlet pipe. It is connected to the second water inlet valve, and the other branch water outlet pipe is connected to the drain pipe via the intermediate washing water drain valve, and by operating the various supply/discharge valves and supplying pressurized water by the pressure pump. A pressurized liquid filter characterized by being capable of rapid filtration of liquid as well as backwashing and intermediate cleaning of the filter body.