JPS63107717A - Filter medium - Google Patents

Abstract

PURPOSE:To prepare a filter medium, superior in filtration and safe to use, by blending chaff ash and both or either one of zeolite or sepiolite as adsorption auxiliary material. CONSTITUTION:At least 5% or more of at least either of pulverized or granular zeolite or sepiolite is blended with chaff ash, to which a small quantity of binding material selected out of clay, cement, limestone or the like is added. Said substances are mixed and sintered according to purposes of properties of binding material to be used or use of the filter material. Then, a filter medium 1 with 1.0-2.0 specific gravity constituted with a granular material with several mm - several 10mm grain size or a plate-shaped material of desired thickness is formed. Said filter medium 1 is of porous structure with a number of pores 2 and purifies water because of the adsorption effect of chaff ash, zeolite and sepiolite.

Description

[Detailed Description of the Invention] (Industrial Application Field) Among various water storage facilities, for example, in the case of swimming pools, the water quality is contaminated with dirt and pathogenic bacteria from human bodies, and it is necessary to sterilize the water. Excess free chlorine such as chlorine gas sprayed on water is not good for the human body, so it is necessary to purify the water quality. In addition, in the case of aquariums and fish ponds, the water quality is contaminated by fish and shellfish excrement and feed residue, etc.
Furthermore, if these decompose and produce toxic gases, it is not favorable for the growth of seafood, so it is necessary to purify the water quality. Therefore, the present invention relates to a filter material used in a filtration device for purifying the water quality of these water storage facilities.

(Prior Art) As means for purifying the water quality of the water storage facility described above, for example, a cartridge-type filtration device filled with a filter material such as activated carbon is installed at the water supply and waste water ports of the water storage tM, and Water storage II The entire water was replaced, and chemical disinfectants and purification agents were sprayed into the storage water.

(Problems to be Solved by the Invention) However, in these water purification means, the activated carbon filtration medium is insufficient in purifying various pollutants including bacteria, and replacing the stored water requires resources and labor. In addition, sterilization and purification using chemical substances are subject to various safety restrictions.

Therefore, an object of the present invention is to provide a filter medium that has excellent purification effect and is easy and safe to use.

(Example) Embodiments of the present invention will be described below with reference to the drawings.

Rice husk ash, which is the main component of the purification material, is a porous silicide and contains activated silica, which has an adsorption effect, as its main component, and has a specific gravity that ranges from 0.2 to 2.0 degrees depending on the degree of pulverization. We are prepared. In addition, zeolite, which is used as an adsorption aid for purification materials, is a natural or synthetic porous mineral crystal that has an adsorption effect mainly on gases such as ammonia gas and nitrogen gas.
Generally, the specific gravity is 2.0 to 2.4. In addition, sepiolite (seiolite), which is used as another adsorption auxiliary material, is a mineral crystal with a porous structure that is even finer than the zeolite, and it adsorbs not only gases such as ammonia gas and nitrogen gas but also bacteria. It also has some effects.

At least one of powdered or granulated zeolite and sepiolite is blended into the above-mentioned rice husk ash in a ratio of at least 5% or more, preferably 10 to 30%, and added with clay, cement, lime, etc. Add a small amount of a binder selected from These are mixed and also used as a binder.

Depending on the properties and purpose of the filter material, it may be sintered to have a specific gravity of 1.0.
~2.0, and the particle size is several mm to several tens of mm.
The filter material is formed into a granular material or a plate-like material having a desired thickness. As shown in Fig. 1, this filter material 1 has a porous structure with a large number of pores 2, and rice hull ash, which is the main component, gradually releases the air stored in the pores while being absorbed into the water. In addition to supplying oxygen, the adsorption power of the activated silica contained in the rice husk ash takes relatively large pollutant particles in the water into the pores 2 to replace the released air, thereby purifying the water quality. In addition, the adsorption aids such as zeolite and sepiolite contained in the filter material 1 effectively adsorb harmful gases such as ammonia, nitrogen, or chlorine gas that are difficult to adsorb with the rice husk ash, and work together with the rice husk ash. In addition to promoting water purification, sepiolite, which has a particularly fine porous structure, can also absorb and remove bacteria.

Next, Figures 2 to 4 show examples in which the above-described filter media are used in a filter device, and the examples shown in Figures 2 and 3 are as follows:
It is applied to a cartridge-type filtration device that is installed at the water inlet or outlet of a recirculation type water storage facility. The inside of the filtration bag 4, which is cylindrical and has a transparent material 3 such as filter cloth or wire mesh stretched at the front and rear ends of the flow path as shown by the arrow, is filled with the granular filter material 5 described above, and the filter bag 4 is A disk-shaped filter material 6 is inserted into one end of the filter.

As a result, a filtration device can be obtained that utilizes the excellent purifying action of the filter medium.

In the embodiment shown in FIG. 4, filtration devices 9 and 10 are installed at the bottom 7 and underwater 8 of the water storage facility, respectively. A filtration device 9 installed at the bottom of the water 7 has a casing 11 made of a filter cloth, a wire mesh, a plastic sheet with numerous through holes, etc.
is formed, and the above-mentioned granular filter material 1 is formed in the casing.
2 is filled. On the other hand, the filtration device 10 installed in the water 8 has a casing 13 similar to the above,
A rectangular plate-shaped filter medium 14 is accommodated in the casing 13, and the filter device 10 has a floating device 1 tightly attached to the upper end thereof.
A weight 16 is floated by 5 and is tightly attached to the lower end.
It is stabilized in an upright position by Further, the above-described filtering device 9 supplies oxygen to the precipitated contaminant 17, and also adsorbs sludge-like fine particles, harmful gases, bacteria, and the like. Furthermore, the above-described filtration device 10 can improve and purify the water quality by the same action as described above for pollutants floating in the water 8, and after being used for a predetermined period of time, it can be replaced with a new one. and use it.

Incidentally, the above-mentioned filter medium is effective not only for freshwater but also for seawater with a high salt concentration.

(Effects of the Invention) As is clear from the examples described above, in the filter medium according to the present invention, mora ash, which is the main component, and an adsorption auxiliary material made of zeolite or sepiolite work together,
It is possible to improve and purify water quality caused by various pollutants, and since the filter medium is not a chemical substance, there is no risk of adversely affecting water quality even if it is used for a long period of time.

[Brief explanation of the drawing]

The drawings show embodiments of the present invention, with Fig. 1 being a front view showing the structure of the filter material, Fig. 2 being a front view of a cartridge type filtration bag using the same filter material, and Fig. 3 being a longitudinal sectional view of the same. , FIG. 4 is an example diagram of another filtration device using the same filter material. [Explanation of symbols] 1... Filter material 2... Pore 3... Permeable material 4... Filtration bag 5.12... Granular filter material 6... Disc-shaped filter material 7...・Underwater
8... Underwater 9.10... Filtration device 11.1
3...Casing 14...Square plate filter material 15.
...Floating device 16... Weight 17... Accumulated pollutant Nso

Claims (1)

[Claims] Rice hull ash is the main component, and porous mineral crystals such as zeolite and/or sepiolite are blended into the rice hull ash as adsorption aids, and a binder is added to these to form particles or plates. A filter material made by molding.