JPH043242B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention has a stirring effect of a sludge removal mechanism and a jetting effect of a fluid other than the fluid to be filtered discharged from the sludge removal mechanism. The present invention relates to a filtration device that prevents clogging of the surface of a filtration element while diluting the concentration of a primary fluid.

[Conventional technology]

Generally, in a filtration device that separates impurities and obtains a pure liquid by passing a liquid containing impurities to be treated through a filter, a type of filter element is used as the filter that scrapes the slag on the surface of the filter. There are many things.

Conventionally, this type of device has only had a filter with a filter element fixed inside the housing, or
Some filters are equipped with a filter sludge scraping member, but since these simply stir, the cleaning effect of the filtration element is insufficient, so although coarse particles can be removed, fine particles cannot be removed. . Therefore, when using the device, the element is cleaned or replaced at an appropriate time.

[Problem to be solved by the invention]

However, in such devices, there is no way to completely clean the elements inside the housing, and the filtration performance deteriorates after a certain period of use. It is necessary to take it out and check the degree of dirt inside the case, and decide when to clean it depending on the degree of dirt.

In addition, if the filtration particle size is large, there is no particular problem, but if the filtration particle size is small, the clogging becomes severe and even if the filtration surface is temporarily purified by backwashing, the clogging phenomenon immediately occurs and it cannot be put to practical use. There was a problem. In addition, a filtration device equipped with a rotatable injection pipe having injection holes for water or the like in place of the slag scraping member has been provided, but a sufficient effect of sludge removal has not been obtained.

[Means for solving problems]

The present invention has been made in view of the above-mentioned problems, and includes a slag removal mechanism that can inject a fluid other than the fluid to be filtered into the housing, and a tube that is prevented from clogging by this sludge removal mechanism. It is an object of the present invention to solve this problem by disposing a filter having a shaped filtration element and making the two relatively rotatable in opposite directions.

[Effect]

Therefore, the slag removing mechanism and the filter can be rotated individually or manually, continuously or intermittently, at desired times, or the above-mentioned operations of both may be combined to strengthen the stirring action and remove the slag. The mechanism allows a fluid other than the fluid to be filtered to be continuously injected at a desired angle to the cylindrical filtration element of the filter to remove filter slag remaining in the filtration element.

〔Example〕

First, the commonly used piping system of the present invention will be explained with reference to FIG. 4. For the filtration device R,
The fluid to be filtered Lg (hereinafter referred to as "undiluted solution") is fed through the stock solution supply pipe G, and is filtered by an internal filter (not shown) to become a filtered fluid Lj (hereinafter referred to as "pure liquid") as a pure liquid. The flow pipe J sends it in the required direction.

On the other hand, as a fluid other than the fluid to be filtered, which is sent as the injection fluid from the injection fluid supply pipe F to drive the slag removal mechanism (not shown) that rotates around the filter, for example, pure liquid Lj, another liquid Lb mixed if necessary, or an inert gas such as air or nitrogen that has no chemical effect even when mixed with it.
There is Ga. Therefore, a switching pot K is placed in an appropriate position, and a conduit m is connected to the supply pipe F via a boost pump P if necessary.

Regarding the pure liquid Lj, the one sent out from the filtration device R may be circulated to the injection fluid supply pipe F,
Alternatively, it may be guided separately.

In addition, in the piping system shown in Figure 4, pure liquid
The piping configurations for Lj, inert gas Ga, or another liquid Lb are not specified in any way, and may be selected as necessary for practical use.

In addition, the basic type filtration device A leading to the present invention was
This will be explained based on the diagram.

In the case 1, a lid 1c equipped with a safety valve 4 is attached to the top end of a cylindrical main body 1H via a gasket 1p, while an inner bottom plate 1b and an outer bottom plate 1s are attached to the bottom.
A pure liquid section 1J containing the pure liquid Lj is formed by this. Note that the portion formed by the inner bottom plate 1b and the lid 1c is a stock solution section 1G that accommodates the stock solution Lg. A drain pipe 1d connected to the drain discharge pipe D and a pure liquid pipe 1j connected to the pure liquid distribution pipe J are attached to the main body 1H in the stock liquid section 1G and the pure liquid section 1J, respectively. Also, 1g is the stock solution supply pipe G
This is a stock solution tube that is connected to the stock solution section 1G to supply the stock solution to the stock solution section 1G, and can be attached to either the upper or lower side of the stock solution section 1G.

Next, the filter 2 has a substrate 2 at the center of the inner bottom plate 1b.
A fixing bolt 2b is erected through k, and a filtration element (hereinafter abbreviated as "element") 2e is fitted onto the substrate 2k through an O-ring 2r.
is tightened with a nut 2n via an O-ring 2r and a top plate 2c inserted into the fixing bolt 2b. A plurality of outflow holes 2a, 1a connected from the inside of the filter 2 to the pure liquid section 1J are formed facing the substrate 2k and the inner lower plate 1b, respectively.

Next, in the scum removing mechanism 3, a circular empty can-shaped flow dividing part 3b is welded to the tip of a shaft pipe 3j that passes through the center of the lid 1c and serves as a rotation shaft and an inflow of injection fluid. At the circumference of the branching part 3b, there is a vertically hollow injection stirring tube (hereinafter referred to as " A plurality of 3S (referred to as "scrapers") are attached at equal intervals along the surface of the element 2e.
Note that 3r is a reinforcing ring that connects the outer periphery of the tip of the scraper 3s, and is held by a plurality of rollers 1t attached to required locations on the inner peripheral surface of the main body 1H, so that the tip of the scraper 3s swings during rotation. to prevent

Note that the spout 3a may be a vertical slit of the scraper 3s, an intermittent slit, or a series of a plurality of holes, but it is sufficient that it corresponds to the entire length of the element 2e, and The injection angle of the injection fluid onto the surface of the element 2e is also preferably in the tangential direction of the element 2e, but the angle is not limited.

Next, 5 is inserted into the shaft tube 3j in order to prevent the stock solution Lg in the stock solution section 1G and the injected gas Ga from flowing out from the hole through which the shaft pipe 3j of the lid 1c passes.
This is a presser that presses the oil seal 6 onto the surface of the lid 1c by bolting.

Next, the effect will be described.

When the stock solution Lg is supplied from the stock solution tube 1g to the stock solution section 1G, the pure liquid Lj from which impurities have been filtered by the element 2e enters the pure liquid section 1J from inside the filter 2 through the outflow holes 2a and 1a, and then enters the pure liquid section 1j. is sent in a predetermined direction. At this time, filter dregs remain on the surface of the element 2e and gradually accumulate over time, resulting in clogging and deterioration of filtration performance.
Therefore, when a high-pressure injection fluid is sent from the shaft pipe 3j in parallel with the supply from the stock solution pipe 1g as an operation for cleaning the element 2e, the stock solution Lg sent from the dividing section 3b to each scraper 3s is , is blown at high pressure and high speed from the jet port 3a onto the surface of the element 2e. Based on the reaction of this jetting effect, the scraper 3s moves forward in the direction of the arrow M, and the scum removing mechanism 3 rotates around the entire circumference of the filter 2, so the jetting effect from the scraper 3s and the stirring effect are mutually exclusive. The accumulated filter slag peels off and falls off, eliminating the clogging and restoring the filtration performance to its original good state. Note that this element cleaning operation is performed continuously or intermittently at required times.

Note that when impurities in the stock solution section 1G remain and their concentration increases, the stock solution Lg with increased concentration is discharged from the drain discharge pipe 1d. In addition, when gas remains in the stock solution section 1G and the pressure inside the section rises and reaches a predetermined pressure, the safety valve 4 operates to discharge the pressure.

Hereinafter, a first embodiment of the present invention will be described based on FIG.

This filtration device B has the filter 2 of the basic filtration device A rotatable.

The filter 22 includes a base plate 22k that is fitted in contact with the stepped portion 23d of the rotating shaft 23, and a top plate 22 that is fitted and inserted into the upper part of the shaft 23 with a key 23k so as not to rotate.
The element 2e is sandwiched between the O-rings 2r and 2r, and is tightened with a nut 22n.

The rotating shaft 23 has a bolt 23b into which the nut 22n is screwed and which is connected to a bearing 24 whose tip is attached to the center of the lower surface of the flow dividing section 3b,
A shaft rod 23 is held by a bearing 25 attached to the center of the outer surface of the outer bottom plate 1s of
j are connected and fixed by a connecting shaft pipe 23p in which a plurality of pure liquid flow holes 23a are bored at required locations.

In addition, the inner bottom plate 1b and the outer bottom plate 1s of the rotating shaft 23
The penetrating parts of the undiluted liquid part 1G and the pure liquid part 1 are connected to each other.
An oil seal 6 and a presser metal 5 are installed to prevent the raw liquid Lg from flowing into the pure liquid section 1j and the pure liquid Lj from flowing out from the pure liquid section 1j.

Next, the effect will be described.

The stock solution Lg supplied to the stock solution section 1G is filtered by the element 2e and enters the filter 22 as a pure liquid Lj.
From the communication hole 23a of the rotating shaft 23 to the connecting shaft pipe 2
3p, flows out from another communication hole 23a facing the pure liquid section 1j, and is guided to the pure liquid pipe 1j. On the other hand, the shaft tube 3j
The high-pressure injection fluid sent to the filter dregs removal mechanism 3 is sent from the spout 3a of the scraper 3s to the element 2e.
sprayed onto the surface. At this time, the filter slag removal mechanism 3
The reaction of this injection effect rotates the entire circumference of the filter 22 to produce a stirring effect, but at the same time, the filter 22 is rotated manually using the handle 26 or automatically using a motor (not shown) via the pulley 27.
2 in the opposite direction to promote separation of the filter cake and further improve the filtration performance.

Furthermore, the pulley 27 and the handle 26 are
Although they are provided side by side on the shaft rod 23j, it goes without saying that both can be implemented as separate structures.

Next, a second embodiment will be described based on FIG. 2. This filtration device is provided with a planetary gear device 30 as a reversing means for reversing the filter 22 of the first embodiment in conjunction with the dregs removing mechanism 3. This planetary gear device 30 has a bolt 23 on a rotating shaft 23.
Sun gear 31 fitted into b and fixed to top plate 22c
and the internal gear 3 attached to the inner surface of the scraper 3s.
2 and three planetary gears 3 meshing with both 31 and 32
3, the planetary gear 33 has a nut 22n
The arm plate 34 is fastened and fixed to the top plate 22c together with the sun gear 31, and is pivotally supported by the top plate 22c.

Since it is configured as described above, scraper 3s
When the injection fluid is ejected and the scraper 3s rotates due to its reaction, the rotational force of the internal gear 32, which both rotate in the same direction, is transmitted to the sun gear 31 via the planetary gear 33, rotating the filter 22 in the opposite direction. It will be necessary to do so. Therefore, when the injection fluid is injected from the scraper 3s, the filter 22 automatically rotates in a desired direction without requiring any external force such as a motor.

Next, a third embodiment will be described based on FIG. This filtration device is constructed by reversing the filter 42 obtained by modifying the top plate 22c of the first embodiment.

This reversing means has a ratchet 42e engraved on the entire outer periphery of the top plate 42c, and a ratchet 42e.
In addition to the ejection port 3a for the element 2e, a special scraper 43 is provided for ejecting fluid to the element 2e.

Therefore, the injection port 43a rotates the ratchet 42r, that is, the filter 42 at the same time as the injection fluid is ejected from the scraper 43, and the same performance as the second embodiment is achieved with an extremely simple structure. be.

Note that in the second and third embodiments, no external forcing force for rotation is required, so depending on the situation, the handle 26 and pulley 27 may be omitted.

In addition, in each of the above embodiments, the cross section of the casing and filter was circular, but the cross section is not limited to a circle, and it is also possible to use a regular polygon or a combination thereof. Needless to say.

Further, the filtration element of the filter in each of the above embodiments may have a desired structure such as a porous structure, a mesh structure, a coil-wound structure, a punched metal structure, or a fiber structure.

〔Effect of the invention〕

As explained above, according to the present invention, the filter slag remaining on the surface of the filter element of the filter can be removed by the stirring action by the relative rotation between the element and the sludge removal mechanism, and from the sludge removal mechanism. This is done by the injection action of a fluid other than the fluid to be filtered, and the dilution effect, so that clogging can be prevented and the filtration action can be carried out reliably and quickly.In particular, the undiluted solution diluted by the synergistic effect of both actions can prevent clogging. is stirred and flows inside the housing, resulting in double filtration, and even impurities with a very small filtration rate are difficult to accumulate, resulting in a continuous and smooth filtration action, and clogging phenomena can be significantly reduced. Further, as the fluid other than the fluid to be filtered, a desired fluid such as a pure liquid, an inert gas, or a pure liquid medium can be used.

Furthermore, according to the present invention, the life of the filtration element is extended because clogging does not easily occur, and contamination due to impurities inside the housing is not only prevented by draining, but also naturally reduced by the flow phenomenon of the stock solution. There is.

Furthermore, the slag removal mechanism and the filter can be automatically rotated using the injection reaction force generated by the fluid injection action, so if necessary, the external mechanism can be simplified without using an external forcing force such as a motor. It also has the advantage of being able to achieve

In particular, according to the present invention, the clogging phenomenon can be significantly reduced, so that the filtration of the fluid to be filtered, which conventionally required multi-stage filtration means such as three or four stages, can be efficiently performed with a minimum number of filtration means. It has the advantage of being able to be carried out in a short time and with low equipment costs.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view of the first embodiment of the present invention, and FIG. 2 is an explanatory diagram showing the main parts of the filter slag removal mechanism and the reversing means for the filter of the second embodiment. FIG. 3 is an explanatory perspective view showing the main parts of a third embodiment using another example of the reversing means, FIG. 4 is a piping diagram of the present invention, and FIG. The figure is a diagram of a basic type filtration device, and the same figure is a longitudinal cross-sectional view, and the same figure is a - line cross-sectional view of the same figure. 2, 22, 42... Filter, 2e... Filtering element, 3... Filter removal mechanism, 3e... Injection stirring tube, 3a... Injection port, 30... Planetary gear device, 4
2r...Rachet.

Claims (1)

[Scope of Claims] 1. Filter dregs retained in a rotatable cylindrical filtration element provided on the outer periphery of the filter are removed in a desired direction along the surface of the filtration element provided outside the filter. Reaction of the fluid injected from the jet ports of a sludge removal mechanism comprising a required number of stirring jet pipes arranged vertically at intervals and jet ports opening at a desired angle toward the surface of the filtration element. a stirring action caused by the rotation generated by the slag removing mechanism, a fluid jetting action of a filtered fluid other than the fluid to be filtered, an inert gas, etc. from the sludge removal mechanism, and rotation of the filtration element in the opposite direction to the sludge removal mechanism. A filtration device characterized in that the filtration is removed by relative rotation between the filtration element obtained by the filtration process and a filtration removal mechanism. 2. A filtration device characterized in that the relative rotational movement is performed continuously or intermittently by the reaction force of the filtrate removing mechanism to eject a fluid different from the fluid to be filtered, or by an external forcing force. . 3. The filtration device according to claim 1 or 2, wherein the relative rotation operation is performed by rotating the filter continuously or intermittently by external force. 4. The relative rotational movement is performed by driving the filter via a planetary gear device using a rotational force generated by the reaction force of the ejection of a fluid other than the fluid to be filtered from the slag removal mechanism. The filtration device according to scope 1 or 2. 5. The relative rotational movement is obtained by rotating the filter by injecting a fluid other than the fluid to be filtered from the filter slag removal mechanism into the ratchet of the filter. The filtration device according to item 1 or 2.