JPH072021Y2 - Pre-filtering device for removing eggs - Google Patents

Description

[Detailed Description of the Invention] "Industrial field of application" This invention is installed between a well pump and a filter device for removing echinococcus eggs in water to remove most of the eggs and to perform the filtration. The present invention relates to a prefiltration device for reducing the load on the device.

“Prior art and its problems” Echinococcus eggs are spherical with a diameter of about 30 μm and are mixed in feces such as Northern Kenne, and the eggs in the excreted feces are passed through various routes from the human mouth. When it enters the human body and enters the intestine, the egg hatches into larvae, penetrates the intestinal wall, and enters various organs. This is a horrifying disease commonly called echinococcosis.

As a method for preventing this, a method is known in which boiling eggs are killed in hot water at 60 ° C, which is said to be the only egg-killing method for eggs, to obtain drinking water, or a method for using an egg-removing filter is used. There is.

The latter filter for removing eggs uses a cartridge filter with a filter membrane that can capture 100% of Echinococcus eggs with absolute certainty. However, the water sources of the echinococcosis-prone areas are rivers, wells,
Although it is a swamp, lake, etc., the dirt changes greatly depending on the weather conditions, and there is a problem that the absolute filtration membrane cartridge that captures 100% of the eggs causes clogging in an extremely short time and the life is increased. Since the absolute filtration membrane cartridge is very expensive, it has a drawback that it is not practical as a daily life product if it is replaced in a short time.

The present invention has been made in view of such circumstances, and most of the dirt such as river water is removed before the cartridge filter, thereby reducing the load on the absolute filtration membrane cartridge filter and using it for a long time. It is an object of the present invention to provide a prefiltering device adapted to be obtained.

“Means for Solving Problems” The configuration of the present invention in accordance with the above-mentioned object is to provide a filter element, a water circulation pump for constantly pressing the filter element with diatomaceous earth as a filter aid, and the diatomaceous earth. The feature of the present invention is to provide a bag (bag-shaped) filter for catching the diatomaceous earth that has been washed out by backwashing so as not to let the inside egg and foreign matter flow out when clogging occurs.

In short, this device ensures that the filter element is pre-coated with diatomaceous earth during filtration by constantly circulating water from the outside to the inside of the filter element, and the diatomaceous earth that has captured the eggs and foreign matter is stored in the bag filter. The feature of the present invention is that the eggs are reliably captured and the eggs are prevented from flowing out to reduce the load on the filter device for removing Echinococcus eggs.

[Embodiment] Hereinafter, a preferred embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a perspective view showing an embodiment of the present invention. In order to clearly show the inside of the device of the present invention, the inside 8 of the device is shown by a solid line.

The pre-filtering device of the present invention comprises a filter housing 2, a mesh filter 3 installed in the housing 2,
Container 6 for charging diatomaceous earth into the housing
A water circulation pump 4 for constantly pressing the diatomaceous earth against the filter element 2 during filtration, a bag filter 5 for capturing the diatomaceous earth flowing out of the filter housing by backwashing, and a five-way valve 7. It is housed in the device 8.

In the above embodiment, since the mesh filter is used as the filter element, clogging of the filter can be prevented. Therefore, by recoating the diatomaceous earth, the filter element can be used over and over again.

The type of the back filter is not particularly limited, but it is needless to say that it is a filter medium capable of removing the eggs of Echinococcus.

"Operation" Next, the operation of the present invention will be described.

As shown in the figure, the pre-filtration device of the present invention is installed in a well pump 1
And a filter device (not shown) for removing echinococcus eggs. First, diatomaceous earth dissolved in water is poured into the diatomaceous earth charging container 6, the five-way valve 7 is switched, and the cock 9
Is opened and the housing 2 in which the mesh filter 3 is mounted is filled with a certain amount. Next, the five-way valve 7 is switched to the circulation circuit to start the circulation pump 4. Water circulates from the outside to the inside of the filter, and the mesh filter 3
Is coated with diatomaceous earth to form a filtration layer. Then, when the five-way valve is switched to the filtration circuit, the water introduced from the well pump into the housing is filtered and sent to the echinococcus egg removal filtration device (not shown) connected to the OUT side.

In the well pump 1, the pressure is reduced by opening the faucet and the power is turned on. However, in the conventional diatomaceous earth filter, the coat is not sufficient at that time, so a considerable amount of unfiltered water comes out at the beginning. After that, the predetermined filtration was started only after the coat became complete, but in the present invention, since the water is circulated by the circulation pump 4 as described above, the diatomaceous earth is surely coated in advance. Therefore, filtered water can be obtained whenever the tap is opened.

When the material is filtered in this way for a certain period of time, suspended solids also cause clogging of the diatomaceous earth and the water stops flowing. At this time, when the circulation pump 4 is stopped and the five-way valve 7 is opened to the backwash position, the pressure is reduced and the well pump 1 automatically operates, causing water to flow from the inside of the filter to the outside and to the mesh filter 3. The diatomaceous earth that had been pre-coated was peeled off from the filter 3 by backflow and was washed out, and the diatomaceous earth was filtered by the bag filter 8 mounted on the side surface of this device, and only the water used for backwashing was drained. It is washed away as a river.

After the backwashing process, the bag filter 5 that has captured the diatomaceous earth is tied with a string and the bag is boiled in boiling water at 60 ° C or higher, so that even if harmful insect eggs are captured, the eggs can be killed. It does not cause secondary pollution such as scattering harmful insect eggs.

Next, a new disposable back filter is mounted and refitted, and the above steps from the coating step are repeated.

[Advantage of Invention] As described above, according to the present invention, since the diatomaceous earth is surely coated by using the circulation pump before the filtration, it is possible to obtain the filtered water whenever the faucet is opened. If it is possible, and if it becomes clogged, the filter can be used repeatedly by washing out the diatomaceous earth by backwashing it and precoating it with new diatomaceous earth, and the eggs of Echinococcus can be reliably captured by the back filter. Therefore, there is no risk that the eggs will be released to the outside, and most of the foreign substances in the water to be treated can be removed by the pre-filtering device of the present invention, so the life of the filter of the Echinococcus egg filter is dramatically increased. Improve.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view showing an embodiment of the present invention. 1 ... Well pump, 2 ... Filter housing, 3 ... Mesh filter, 4 ... Circulation pump, 5 ... Back filter, 6 ... Diatomaceous earth input container, 7 ... Five-way valve.

Claims (2)

[Scope of utility model registration request] 1. A filter element, a water circulation pump for constantly pressing the filter element with diatomaceous earth as a filter aid, and when the diatomaceous earth is clogged, the diatomaceous earth washed out by backwashing A pre-filter device for removing eggs, which is mounted between a well pump and a filter device for removing eggs, comprising a bag filter for catching eggs and foreign substances so as not to flow outside. 2. The pre-filtering device for removing eggs according to claim 1, wherein the filter element is a mesh filter.