JPS6090016A - Moving bed type filter apparatus - Google Patents

Abstract

PURPOSE:To prevent the mixing of dirty washing waste water into treated water by performing secondary washing and to attain to reduce the discharge amount of washing waste water, by separating a transfer washing part into primary and secondary washing parts and discharging only the washing sewage in the primary washing part out of the system. CONSTITUTION:Raw water A is supplied to the lower part in the filter bed 2 of a filter apparatus 1 from a raw water supply port 3 and clarified by filtering suspended substances therein through the countercurrent contact with a filter material E during rising and discharged as treated water B out of the system from a treated water discharge port 4. On the other hand, the filter material E contaminated by the adhesion of suspended substances is moved below the raw water supply port 3 under own wt. and transferred to a separation apparatus 8 through a transfer pipe 7 along with recirculation water C, withdrawn from the filter material withdrawal port 5 provided to the bottom part of the filter apparatus 1 by a water ejector 6, as filter material-containing recirculation water C'. In addition, a part of washing sewage is discharged out of the system from a discharge port 9 as washing waste water and finally treated by a treating apparatus.

Description

DETAILED DESCRIPTION OF THE INVENTION A) Industrial application field The present invention is directed to I) filtration and clarification of various suspended liquids such as tap water, sewage, industrial wastewater, etc. using a granular protection bed, and to remove contamination during the filtration operation. The present invention relates to a moving bed type filtration device in which the furnace material is extracted, washed, regenerated, and circulated onto the granular F bed.

Conventional technology Conventionally, a granular F-bed type filtration device forms a fixed F-bed with granular furnace materials such as sand, anthracite, activated carbon, zeolite, etc., and filtration and cleaning and regeneration of contaminated furnace materials are alternately performed. Fixed-bed filtration equipment that repeats intermittent flow is common, but in recent years, it has become possible to perform continuous E-filtration operation, as well as backwash pumps, blowers, automatic backwash valves, automatic sequence circuits, etc. Moving bed type filtration equipment that continuously regenerates and circulates the E material has come to be used because it can be omitted and the construction cost is low. Conventional moving bed type filtration equipment has a bed made of granular furnace material, an outlet for treated water at the top, a raw water supply port at the bottom for supplying raw water to the lower part of the F bed, and a contaminant at the bottom. E-filtration clarification of the suspension is performed using a filtration device equipped with a furnace material extraction port, and the furnace material contaminated during the filtration operation is extracted and transferred to a separation tank provided at the top of the filtration device. Contaminated furnaces are equipped with a transfer means such as an air lift or a pump, and a transfer cleaning section with an F material return pipe connected to the bottom of the separation device and an outlet for cleaning wastewater at the top of the door material return pipe. The structure is such that the materials are washed and regenerated and the cleaned furnace materials are circulated on a fluidized bed. In the above-mentioned conventional moving bed type filtration device, the furnace material and the treated water come into countercurrent contact in the door material return pipe, and the contaminated furnace material is secondary cleaned. Since the drainage outlet is at the upper part of the P material return pipe, if the discharge amount of the cleaning wastewater is equal to or less than the circulating mw amount, the treated water will not rise all the way up into the door material return pipe and will cause secondary damage to the furnace material. There is an inconvenience that cleaning is not carried out and the polluted cleaning wastewater descends through the return pipe and mixes with the treated water, deteriorating the water quality. Therefore, a flow rate control device is required to always draw out more liquid than the amount of circulating liquid to the outside of the system, and since the entire amount of washing wastewater is discharged, the amount of discharge increases, and the capacity of the after-treatment device for the washing wastewater becomes large. There are drawbacks.

C) Purpose of the Invention The present invention has been made in view of the above circumstances.The transfer cleaning section is divided into a primary cleaning section and a secondary cleaning section, and only the cleaning wastewater of the primary cleaning section is discharged outside the system. By using the cleaning water in the secondary cleaning section as a circulating fluid, secondary cleaning can be carried out by countercurrent contact between the treated water and the furnace material immediately after the amount of cleaning wastewater discharged, and the treated water of contaminated cleaning wastewater can be used as a circulating fluid. The purpose of this project is to provide a device that can prevent contamination with waste water and further reduce the amount of cleaning wastewater discharged.
A filtration device that forms a bed and has a raw water supply port at the bottom that supplies raw water to the bottom of the E bed and a treated water discharge port at the top, and a separation device that extracts contaminated furnace material from the bottom of the E bed. \
In the moving bed two offshore passage device, which is provided with a transfer means for transferring and a means for supplying the furnace material separated by the separation device to the upper part of the F bed, the transfer means 6 for the furnace material E, the transfer pipe 7 and the A primary cleaning section consisting of a separation device 8 equipped with a discharge port 9 for a cleaning drainage basin and a return section 10 for the furnace material E at the bottom, and the above-mentioned return section 1.
A secondary cleaning section 11 equipped with a circulating fluid C outlet pipe 12 at the upper part to bring the F material E from 0 into countercurrent contact with a part of the treated water B.
It is a moving bed type filtration device characterized by being provided with a water ejector, and it is most suitable to use a water ejector as the transfer means.

2] Structure of the Invention The present invention will be explained below based on drawings showing embodiments thereof.

FIG. 1 is a schematic vertical cross-sectional view of one embodiment of the present invention, and FIG. 2 is a schematic vertical cross-sectional view of another embodiment.

Reference numeral 1 denotes a cylindrical tank whose lower end is constricted into an inverted conical shape, and at the bottom of the tank there is an outlet 5 for extracting contaminated furnace material, at the top there is a treated water outlet 4 with an overflow weir on the front, and a cylindrical part. beneath(
This is a filtration device in which the raw water supply port 6 is extended to the lower part of the E floor.

2 is a p-bed using granular furnace material E such as sand, anthracite, activated carbon, zeolite, etc., and is filled from the bottom to the middle of the filtration device 1. Reference numeral 6 denotes a contaminated furnace material transfer means of a water ejector, which sucks the furnace material E from the waste material extraction port 5 by the suction effect of circulating water sent from the circulation pump 13 and extracts it to the transfer pipe 7.

Note that the transfer means 6 may be replaced by an air lift device using air instead of the water ejector. Reference numeral 8 denotes a separation device provided above the filtration device 1 and separated from the device 1, but it may also be provided integrally above the filtration device 1.
The section from to the separation device 8 is defined as a primary cleaning section. The separation device 8 has an outlet 9 for a washing drainage basin equipped with an overflow weir in the front at the top, and an F material return section 10 at the bottom communicating with a secondary washing section 11.
It is a cylindrical tank with a Further, the separation device 8 may be a multi-stage tank vertically partitioned into a plurality of chambers.

The secondary cleaning part 11 may have a bell shape in which the tubular door material return part 10 penetrates the upper end surface of the tarok in the embodiment shown in FIG. Separation device 8
A large diameter pipe may be connected to the bottom of an outer tank surrounding the inner tank, or a part of the pipe may have a large diameter. Although other smooth shapes are possible, any shape is sufficient as long as the treated water and the p-material E come into countercurrent contact and secondary cleaning is performed. Secondary cleaning section 1
The lower end of 1 may have a shape that opens near the upper part of the cap-shaped dispersion plate 14 provided in the treated water near the upper part of the hearth 2 in the filtration device 1, or a shape such that the lower end surrounds the upper surface of the dispersion plate 14. But that's fine. Reference numeral 12 denotes a circulating water outlet pipe that is provided at the upper part of the secondary cleaning section 11, connects to the circulation pump 13, and draws out the circulating water C.

E) Effects of the Invention The effects of filtering and clarifying a suspension and continuously cleaning and regenerating contaminated furnace materials using the moving bed type filtration device having the above-mentioned through-hole construction will be described below.

Raw water A such as tap water, sewage, and various industrial wastewater is supplied to raw water supply port 3.
When supplied from above to the lower part of the P bed 2 of the filtration device 1, suspended solids are filtered while rising in countercurrent contact with the uniform and densely packed furnace material E moving from above and forming the F bed. be clarified. The purified and stored raw water A is discharged as treated water B to the outside of the system from the treated water outlet 4 through the overflow weir. A part of the treated water B is used for secondary cleaning of material E, which will be described later, and as replenishment water for circulating water. The reactor material E contaminated with suspended matter is moved by its own weight to the bottom of the raw water supply port B, and is extracted from the bottom of the filtration device 1 by the water ejector 6 from the provided F material extraction port 5 and circulated. Together with water C, it is transferred to the separation device 8 through the transfer pipe 7 as circulating water C containing E material.During this time, the contaminated reactor materials are washed by the turbulent flow of the circulating water C, and adhered substances due to collisions between the reactor materials, etc. The circulating water C transferred to the separator 8 is separated by sedimentation into washed wastewater containing suspended solids and the furnace material. A part of the washed wastewater is separated as washing waste water. The water is discharged from the system through an overflow weir provided at the top of the device 8 through a discharge port 9, and is finally processed by a processing device (not shown).

Also, a part of the washed wastewater may be circulated to the lower part of the F bed 2 for filtration and clarification. The cleaned F material E flows down into the secondary cleaning section 11 through the P material return section 10 connected to the bottom of the separation device 8 (C) in the form of a slurry together with the remainder of the washed wastewater. 11, the reactor material comes into countercurrent contact with a portion of the treated water rising through the gap between the lower part of the cleaning section 11 and the upper surface of the dispersion plate 14, thereby performing secondary cleaning. E is uniformly distributed to the upper part of the f5 bed 2 by the dispersion plate 14 to form a new hearth.The rise of the treated water to the secondary cleaning section 11 is equal to the amount of washed sewage flowing back into the cleaning section 11 from the section 10. From the circulating water outlet pipe 12 to the circulating pump 13
This can be obtained by increasing the amount of circulating water C that is drawn out, but in the device of the present invention, while the circulating water C is being circulated, a portion of it is discharged to the outside of the system as washing wastewater in the separation device. The amount of circulating water C can be made larger than the amount of cleaning wastewater flowing into the secondary cleaning section 11 from the return section 10. The amount of rise of the treated water can be adjusted by adjusting the amount of washed wastewater flowing into the secondary washing section by changing the vertical position of the separation device 8, washing wastewater discharge port 9, etc., or by adjusting the head difference obtained by changing the vertical position of the separation device 8, the washing wastewater discharge port 9, etc. It can be arbitrarily set by restricting by the valve of , or by restricting by the valve of the discharge port 9, etc.

f) Effects of the invention By setting up a primary cleaning section and a secondary cleaning section, only the heavily polluted cleaning water from the primary cleaning section is discharged to the outside of the system, and the cleaning water from the less polluted secondary cleaning section is used as circulating water. Therefore, the capacity of the after-treatment device for washing wastewater can be made smaller than the conventional device that discharges the entire amount of washing water.

Since the amount of circulating water extracted from the secondary cleaning section is always larger than the amount of cleaning wastewater flowing in through the return section, countercurrent contact between the offshore wood and the treated water is maintained, and the secondary cleaning of the furnace materials is performed. Sewage does not mix with treated water and deteriorate water quality. Therefore, it is possible to eliminate the need for a control device for the amount of circulating fluid required in conventional devices.

The apparatus of the present invention that achieves the above effects is extremely useful industrially.

[Brief explanation of the drawing]

FIG. 1 is a schematic vertical cross-sectional view of one embodiment of the present invention, and FIG. 2 is a schematic vertical cross-sectional view of another embodiment. 1: Filtration device, 2: Hearth, 3: Raw water supply port, 4: Treated water discharge port, 5: Door material extraction port, 6: Transfer means, 7: Transfer pipe, 8: Separation device, 9: Washing wastewater discharge Outlet, 10: F material return section, 11: Secondary cleaning section, 12: Circulating water outlet pipe, 16:
Circulation pump, 14: Dispersion plate, A: Raw water, B: Treated water, C
, C: Circulating water, D: Washing water, E: Furnace material. Patent applicant: Mitsubishi Kakoki Co., Ltd. Procedural amendment (method) February 17, 1980 Director-General of the Patent Office Kazuo Wakasugi 1, Indication of case 1983 Patent application No. 196066 2, Title of invention: Mobile bed type machine Filtration device 3, relationship with the case of the person making the amendment Patent applicant address: 2-6-2 Marunouchi, Chiyoda-ku, Tokyo January 31, 1980 (shipping date) 5, subject of amendment 6, content of amendment 1 ) Engraving of application form (no change in content) As attached 2) Engraving of specification (no change in content) As attached

Claims (1)

[Claims] (1) A P bed is formed from granular furnace material, a filtration device is equipped with a raw water supply port at the bottom for supplying raw water to the bottom of the hearth, a discharge port for treated water at the top, and a furnace contaminated from the bottom of the hearth. In a moving bed type filtration device, the moving bed type filtration device is provided with a transfer means for extracting the material and transferring it to a separation device, and a means for supplying the furnace material separated by the separation device to the lower part of the hearth, a transfer means 6 for the furnace material E, a transfer means for transferring the furnace material E, Pipe 7 and drain outlet 9 for cleaning drainage at the top, p at the bottom
A primary cleaning section consisting of a separation device 8 equipped with a return section 10 for material E, and an outlet pipe for circulating temporary C at the top to bring material F E from the return section 10 into countercurrent contact with a portion of the treated water B. 1. A moving bed type filtration device characterized in that a secondary cleaning section 11 is provided with a secondary cleaning section 12. Q) The moving bed type filtration device according to claim 1, wherein the transfer means 6 is a water ejector.