JP5248938B2 - Sewage treatment equipment - Google Patents

Description

The present invention relates to a sewage treatment apparatus mainly used for filtering and purifying sewage containing sludge such as grinding fluid, cleaning fluid or coolant of a machine tool.

Conventionally, as this kind of sewage treatment apparatus, Japanese Patent Application Laid-Open No. 2005-2 previously disclosed by the present inventor.
As described in Japanese Patent No. 79402 (Patent Document 1), a filtration chamber and a filtrate chamber are partitioned and formed in a required housing via a partition plate, and a cylindrical core material that allows water to pass through the filtration chamber. The required number of filters formed by laminating substantially film-shaped non-permeable filters with small protrusions in a substantially columnar shape are disposed through one end of the core material of each filter via a communication pipe. It is known that a filtrate chamber is formed with a sewage supply port and a sludge discharge port, and a filtrate chamber with a filtrate discharge port and a cleaning solution supply port.

In the sewage treatment apparatus described in JP-A-2005-279402 configured as described above, the sewage such as a coolant liquid containing sludge is supplied in a pressure-feed manner from the sewage supply port into the filtration chamber of the housing. The filter is filtered from the outer periphery of the filter held in a predetermined gap toward the inner periphery, and the filtrate is introduced into the filtrate chamber through the core material and the communication pipe, and then discharged outward from the filtrate outlet. is there.

When sludge adheres to the outer surface of the filter during the filtration process, the sewage supply port and the filtrate discharge port are respectively closed, and then the cleaning liquid mixed with compressed air is added. Supplyed into the filtrate chamber from the cleaning liquid supply port in a pressure-feed manner, introduced into the core through each communication pipe, and permeated from the inner periphery of each filter holding a predetermined gap by small protrusions toward the outer periphery. The sludge adhering to the outer surface of the filter member is washed off and washed, and then the sludge is discharged outward from the sludge discharge port together with the cleaning liquid.
JP-A-2005-279402

By the way, the conventional sewage treatment apparatus configured as described above can surely filter the sewage, and can easily perform the washing process even when the filter is clogged. It is what you have.
First of all, sewage is pumped from the sewage supply port into the filtration chamber of the housing, and is filtered while being permeated from the outer periphery of the filter toward the inner periphery by the pressure.
Filtration treatment speed of sewage is relatively slow, and as a result, filtration time is long, and efficient filtration treatment is difficult.
Secondly, when the filter is clogged, the sewage supply port and the filtrate discharge port are closed, and then the cleaning liquid is pumped into the filtrate chamber from the cleaning liquid supply port and introduced into the core material through each communication pipe. Since the filter is washed while being squeezed, the filtration process must be stopped every time the filter is clogged. As a result, the treatment efficiency of sewage is very poor.
Third, when the filter is clogged as described above, the filter is washed with a cleaning liquid.
After cleaning the sludge, the sludge is discharged outward from the sludge discharge port together with the cleaning liquid, so that the post-treatment of the discharged cleaning liquid containing sludge and increasing in volume is not only cumbersome and time-consuming. Requires a separate post-processing device.

The present invention is intended to solve the conventional problem, increase the filtration processing speed of sewage, and even when the filter is clogged, without stopping the filtration processing of all the filters, Not only can the filter be stopped and washed one by one, but also the sludge deposited at the same time as the filtration process can be discharged to the outside. An object of the present invention is to provide a sewage treatment apparatus capable of performing a batch process quickly and reliably and efficiently.

To achieve the above object, an invention according to claim 1, lux containing sludge - a treatment tank allowed to reservoir by supplying wastewater, such as runts liquid, a sludge reservoir sewage depositing into said treatment tank It comprises a discharge conveyor installed inside to discharge outside, and a required number of filters installed inside the treatment tank to suck and filter stored sewage, and each of the filters can be freely passed from outside. required number of non-permeable filter that is a full Irumu shape via a cylindrical core material - with members are laminated on the pillar shape, each of said filters - a small projection is formed in a dense shape at least one surface of the member And a filter suction pipe and a washing compressed air blow pipe are connected to each filter core through a branch pipe so as to be switchable via a switching valve. The gist of the device .

The invention according to claim 2 is characterized in that the discharge conveyor is provided with a scraper at a predetermined pitch so as to discharge sludge deposited on the inner bottom of the treatment tank to the outside.
The gist of the sewage treatment apparatus according to claim 1.

The invention according to claim 3 is characterized in that a spring member is interposed via an adjustment bolt so as to elastically adjust and hold a gap between adjacent laminated filter members on the filter core. The gist of the sewage treatment apparatus according to claim 1 or 2 is provided.

Since the invention according to claim 1 is configured as described above, the wastewater containing sludge is sequentially supplied into the treatment tank, and the wastewater is sucked from the core material of each filter through the suction pipe for filtration. It is possible to perform suction filtration while allowing the filter to pass through the inner periphery of the filter held in a predetermined gap by the small protrusions, and significantly increase the filtration rate of sewage compared to the conventional example. In addition, when clogging occurs in the filter, the filter suction pipe that continues to the filter core one by one is switched from the suction pipe for cleaning to the compressed air blowing pipe for washing, and the compressed air is blown. Not only can it be processed,
The sludge deposited in the treatment tank can be discharged to the outside simultaneously with the filtration process by the discharge conveyor. As a result, the sewage filtration process is always performed quickly, reliably and efficiently. It can be batch processed.

Since the invention according to claim 2 is configured as described above, it easily proceeds outward simultaneously with the filtering treatment of sewage while scraping the sludge deposited on the bottom of the treatment tank with a scraper. Moreover, it can be discharged reliably.

Since the invention according to claim 3 is configured as described above, the gap between adjacent filter members can be always properly maintained while being elastically biased by the spring member. As a result, not only the filtration process of the filter but also the cleaning process when clogging occurs can be performed quickly and reliably.

Hereinafter, the best mode for carrying out the present invention will be described in detail based on an embodiment shown in the drawings.

1 to 4 show an embodiment of the present invention. In the figure, 1 is a substantially rectangular processing tank having a required width and depth, and 2 is one end of the inner bottom of the processing tank 1. An endless drive-type discharge conveyor arranged along the upper end of the other end from the section 3 is a scraper attached upright on the running surface of the discharge conveyor 2 at a predetermined pitch, 4 and 5 are discharge conveyors Reference numeral 6 denotes a driving tail pulley and a head pulley around which 2 is wound, and 6 is a sludge storage box separately provided below the tail pulley 4. Reference numeral 7 denotes a required number of sewage filters arranged in parallel in the treatment tank 1 so as to be positioned above the discharge conveyor 2, and the filter 7 is a circle as shown in FIGS. It is formed by laminating a required number of water-impermeable filter members 8 having a shape. The filter member 8 is formed into a substantially film shape having a thickness of 0.1 to 1.0 mm, preferably 0.2 to 0.3 mm, by a synthetic resin material such as polypropylene, and a small protrusion on one surface thereof. 9 is densely formed, and an insertion hole 10 is formed at the center. 11 is a substantially cylindrical core member inserted through the insertion hole 10 in the center of the multilayer filter member 8, and the core member 11 connects a pair of semi-cylindrical core members 12 to allow water to flow from the outside. It is formed by connecting with a band 13 at a predetermined interval. 14 is an adjustment bolt connected from the lower end of the filter 7 to the lower end of the core 11 in order to properly adjust the gap between the filter members 8 constituting the filter 7, and 15 is a pressing plate 16 attached to the adjustment bolt 14. A nut 17 that is screwed so as to be able to be screwed through is attached to the adjusting bolt 14 so as to be always energized to hold the gap between the filter member 8 elastically. It is a spring member.

18 is a connecting pipe connected to one end of the core 11 constituting each filter-7,
19 is a suction pipe for filtration connected to each connecting pipe 18 via a branch pipe 20;
Reference numeral 22 denotes an operation valve and a valve interposed in each branch pipe 20, and the suction pipe 19 is connected to a filtrate storage tank 24 provided separately via a filter pump 23. 2
Reference numeral 5 denotes a compressed air blow pipe connected to each of the connecting pipes 18 via a branch pipe 26, and 27, 28, and 29 denote check valves and regulators sequentially interposed in the branch pipes 26. The air pipe 25 is connected to a compressed air generating source 32 such as a blower or a compressor through a pressure switch 30 and a filter regulator 31. 33 is a water supply pipe for supplying sewage such as a coolant containing sludge from the sewage storage tank 34 into the treatment tank 1 via the pump 35, and 36 is an overflow of the sewage supplied to the treatment tank 1. -A reflux pipe for refluxing water to the sewage reservoir 34. In addition, 37 is a lower limit detection float switch for the sewage stored in the treatment tank 1, and 38 is a water supply pipe for supplying filtered water with a pump 40 to a machining center 39 for machining the work.

  Next, the operation of the embodiment configured as described above will be described.

First, the sewage is supplied into the treatment tank 1 through the water supply pipe 33, and the overflow water is returned to the sewage storage tank 34 through the return pipe 36. Next, each operation valve 21 is operated, and the filter pump 23 is operated while the core 11 of each filter 7 is connected to the suction pipe 19 via the connection pipe 18 and the branch pipe 20. Then, the stored sewage in the treatment tank 1 is sequentially permeated from the outer periphery of each filter 7 toward the inner periphery, and the sewage is suction filtered, and then the filtered water is filtered through the core material 11, the connecting pipe 18, the branch pipe 20 Suction pipe 19
The water is sent to the filtered water storage tank 24 through the storage. At this time, the sewage in the treatment tank 1 is suction filtered through the filter 7 while being sucked by the suction pipe 19,
Compared to the conventional example in which the sewage is compressed and filtered by a filter while the sewage is pumped into the filtration chamber, the filtration rate of the sewage can be greatly increased. Filter-7
Since the small protrusions 9 are densely formed on one surface of the filter member 8 constituting the
The small protrusions 9 can properly maintain the gap between adjacent filter members 8 to extremely smoothly filter sewage, and can significantly increase the filtration area. Therefore, it is always possible to perform filtration of sewage quickly and reliably and efficiently. Further, since the spring member 17 is interposed via the adjusting bolt 14, the gap between the adjacent filter-members 8 can be elastically adjusted and held.

Then, the discharge conveyor 2 is operated in parallel with the suction filtration process, and the sludge deposited in the treatment tank 1 is discharged outward while being scraped up by the scraper 3 and sequentially stored in the sludge storage box 6.

Further, when the filter 7 is clogged, the washing process is performed while stopping the suction filtration of the filters 7 one by one without stopping the suction filtration of all the filters 7 one by one.
That is, the operation valve 21 of the branch pipe 20 connecting the connecting pipe 18 of the filter 7 in which clogging has occurred to the suction pipe 19 is closed and the air operated valve 29 of the branch pipe 26 connected to the blower pipe 25 is opened. Let it work. The compressed air generated by the compressed air generation source 32 passes through the filter regulator 31, the air operated valve 29, the regulator 28, the check valve 27, the branch pipe 26, and the connecting pipe 18 to enter the core 11. The filter 7 is made to transmit in order from the inner periphery of the filter 7 toward the outer periphery while blowing air.
7 is washed. At this time, since the gap between the filter members 8 constituting the filter 7 is properly held by the small protrusions 9, the compressed air can be permeated very smoothly and cleaned. The filter 7 can always be cleaned quickly and reliably and efficiently. Further, since compressed air is supplied for cleaning, cleaning can be performed very efficiently and reliably.
When the cleaning process of the filter 7 is completed, the operation of the compressed air generation source 32 is stopped, and the air operated valve 29 is closed to stop the blowing of compressed air. Thereafter, the operation valve 21 of the branch pipe 20 is opened, and the sewage is sucked and filtered through the filter 7 while being sucked by the suction pipe 19.

Similarly, the cleaning process is performed while the suction filtration of the filter 7 that has been sequentially clogged is stopped. At this time, it is possible to wash only the clogged filter 7 without stopping the filtering process of the other filters 7, so that the sewage is always rapidly and reliably filtered. It can be done.

In addition, in the said Example, although the filter member 8 shall be the small protrusion 9 formed in the one surface, it is not limited to this, You may make it form in both surfaces.
Further, the core material 11 is formed by connecting a pair of semi-cylindrical core material members 12 by a connection band 13, but is not limited to this. For example, the core material 11 is passed through the outer peripheral surface of the cylindrical body. A well-known thing can be adopted and used, such as what formed the water hole densely.

It is the schematic which shows one Example of this invention. It is an operation | movement system diagram of the filter-7 shown in an Example. It is a disassembled perspective view which shows the filter 7 of an Example. It is the A section expanded sectional view of FIG.

Explanation of symbols

1 Processing tank 2 Discharge conveyor 3 Scraper 7 Filter
8 Filter member 9 Small protrusion 11 Core material 14 Adjustment bolt 17 Spring member 18 Connection pipe 19 Suction pipe 20 Branch pipe 21 Operation valve 25 Blower pipe 26 Branch pipe 29 Air operated valve

Claims (3)

A treatment tank allowed to reservoir supplies dirty water you containing sludge, and provided inside evacuation conveyor to to discharge the sludge reservoir sewage depositing into the processing bath to the outside, the reservoir sewage into the treatment tank And a required number of filters installed in order to allow suction filtration.
Required number of non-permeable filter that is a full Irumu shape through passing water freely tubular core than outwardly - with members are laminated on the columnar shape, each of said filter - at least one surface of the member The small protrusions are formed in a dense shape, and the suction pipe for filtration and the compressed air blowing pipe for cleaning are connected to the core material of each filter through a switching pipe so as to be switched through a switching valve. A sewage treatment apparatus characterized by that. 2. The sewage treatment apparatus according to claim 1, wherein the discharge conveyor is provided with a scraper at a predetermined pitch so that sludge deposited on the bottom of the treatment tank is discharged outward while being scraped up. Filter - next meet laminated filter is the core material - is characterized by formed by interposed spring member via the adjusting bolts to the gap between the members allowed to resiliently adjust the holding, according to claim 1 or 2
The sewage treatment apparatus as described.

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