JP4324784B2 - Dust removal device for separating foreign materials - Google Patents

Description

  The present invention relates to a solid-liquid separation device that separates a large amount of raw water containing floating substances in raw water using a cyclone, and in particular, as washing water for washing a pump water absorption tank of a rainwater pump station such as sewage. The present invention relates to a dust separation device for separating impurities that purifies and uses water in a water tank.

Conventionally, a treatment facility that performs solid-liquid separation by installing a sand settling separator or a residue separator in an inflow dredge facility that takes water from a sewage pipe or river to a rainwater pumping station is described in, for example, Patent Document 1 As is known.
A cyclone type filtration device that separates oily or water-soluble processing fluid used during processing of metal or ceramic of industrial machinery from cutting waste is also known as described in Patent Document 2, for example.

Japanese Patent Laying-Open No. 2003-129559 (paragraph numbers 0001 to 0004, FIG. 1) JP 05-269405 A (paragraph numbers 0014 to 0017, FIG. 1)

The sand settling machine and the screen residue separator used in the above inflow dredge equipment require a lot of installation space and are difficult to install in an existing pumping station. Moreover, it becomes an open channel in the installation part of a separation apparatus, and a pump for water supply and pressurization is needed separately. The rainwater and sewage from the water absorption tank or the like that has taken in water includes sand, mud, and other sediments, and strings such as strings and cloth floating on the water. If this taken water is used directly, it will have a detrimental effect on the spray nozzle that cleans the pump water tank etc. in the next process. In addition, the conventional cyclone for cleaning a coolant cannot handle a large amount of residue when applied to a sewer.
The present invention provides a dust removing device for separating contaminants that can be used as cleaning water for a pump water tank, etc., by using a cyclone to purify sewage and the like in which sand with high specific gravity and light specific gravity are mixed.

In the dust removing apparatus for separating foreign substances according to the present invention, a raw water supply pipe is disposed in a tangential direction on the peripheral wall of a sealed cylindrical tank, and the tank bottom is formed in a conical shape and connected with a sedimentation discharge pipe. In an apparatus for separating contaminants provided with a separation liquid take-out pipe, a sealed cylindrical tank is divided into a first separation chamber and a second separation chamber by a partition wall having an opening in the center , and a funnel-shaped overflow nozzle is arranged in the opening. A supply pipe and an underflow nozzle are provided on the peripheral wall of the sealed cylindrical tank constituting the first separation chamber, and a screen is provided concentrically with the sealed cylindrical tank in the second separation chamber. A rotatable scraper is formed in an arc shape and is inclined and slid on the screen, a separation water chamber is formed outside the screen, and a take-out pipe is connected to the separation water chamber to constitute a second separation chamber. connect the downcomer to drain which is connected to the top wall of the sealed cylindrical tank, the downcomer Please not be obtained by constituting the inverted U-shaped siphon pipe, the raw water was injected tangentially into the first separation chamber, swirling along the wall surface by the action heavy sand specific gravity, mud fraction of grit of the centrifugal force While precipitating, separate. Sand with a large specific gravity swirling in the vicinity of the peripheral wall of the first separation chamber is blocked by the partition wall of the overflow nozzle and does not flow into the second separation chamber. The residue collected in the center of the first separation chamber while swirling flows in from the lower end of the overflow nozzle contracted by the discharge of the separation water, and rises to the second separation chamber. It lighter specific gravity residue flows into the second separating chamber with water, Ru is trapped in the screen. The foreign matter captured by the screen can be scraped off by the screw action of the scraper attached obliquely, and the foreign matter can be pushed up to the top wall to prevent clogging. It is possible to remove contaminants harmful to the nozzle for injection that cleans the pump water tank or the like in the next step. It can be laminated on the top wall of a sealed cylindrical tank to separate it into separated water as residue. The residue that has been scraped off by the scraper and floated on the top wall of the sealed cylindrical tank is pushed out to the drain pipe by the internal pressure of the sealed cylindrical tank, and the negative pressure of the downcomer acts to increase the flow rate of the drainage. Extraction is easy. The precipitated precipitated sand, the discharge pipe of the tank bottom of a closed cylindrical tank if opened depending on the situation, can be pushed out by the internal pressure of the closed cylindrical tank.

The scraper turning means has a main shaft connected to the scraper protruding from the top wall of the sealed cylindrical tank, and a horizontal driven shaft and a drive shaft perpendicular to the driven shaft are connected to the main shaft via bevel gears, respectively. The scraper is operated from the vicinity of the peripheral wall of the sealed cylindrical tank by being connected, and the scraper can be manually slid on the screen surface according to the state of clogging of the screen.

The dust removing device for separating foreign substances according to the present invention is configured as described above, and the second separation chamber having a cylindrical screen is installed on the upper stage of the first separation chamber forming the cyclone. What is removed by the screen of the separation chamber only needs to be light in specific gravity, and scraper scraping to prevent clogging is easy. The screen requires a backwashing device when various specific gravity objects are mixed, but in the present invention, since there is little mixture of foreign substances having different specific gravity, it is not necessary to provide a backwashing device. The draining process of the settled sand and the levitated residue is possible even during operation of the dust removing apparatus for separating foreign substances. Moreover, since the residual pressure can be used because of the sealed structure, a pump for feeding separated water or pumping is not required. Since the dust removal device is compact, it requires less installation space.

  Referring to the drawings, the dust removing apparatus for separating impurities according to the present invention will be described in detail. FIG. 1 is a longitudinal sectional view of a main part of a sealed cylindrical tank. A partition wall 2 having an opening 2a in the part is arranged horizontally. An upper end of a funnel-shaped overflow nozzle 3 is supported on the opening 2a of the partition wall 2, and the sealed cylindrical tank 1 is divided into a lower first separation chamber 4 and an upper second separation chamber 5. A raw water supply pipe 6 is tangentially connected to the peripheral wall 1 b of the sealed cylindrical tank 1 of the first separation chamber 4, and the raw water is press-fitted into the first separation chamber 4 and swirling around the lower surface of the overflow nozzle 3. Let it flow. Sand with a high specific gravity and mud sediment flowing into the first separation chamber 4 is swung along the wall surface by centrifugal action, blocked by the lower wall of the partition wall 2 and the overflow nozzle 3, and settled while decelerating. The bottom of the tank-shaped tank bottom 1a slides down and accumulates in the center. Sediment having a low specific gravity after separating the settling sand is collected in the center of the first separation chamber 4 while swirling, and flows into the second separation chamber 5 together with water from the lower end of the funnel-shaped overflow nozzle 3.

Underflow nozzle 7 in the central portion of the closed cylindrical tank 1 the tank bottom 1a is Yes and arranged, by connecting the emissions tube 8 of the sand in the underflow nozzle 7, interposed a ball valve 9 to emissions tube 8 It is. The precipitate which is integrated in the bottom of the first separation chamber 4, if opening the ball valve 9, the emergent action of head pressure and underflow nozzle 7 of the closed cylindrical tank 1, to accelerate the flow speed of the waste water, emissions pipe The settling sand from 8 is discharged.
The drainage process of the precipitated contaminants can be performed even during operation of the dust separator for separating contaminants.

  As shown in FIG. 1, a screen 10 is disposed concentrically with the sealed cylindrical tank 1 in the second separation chamber 5, and a separation water chamber 11 is formed between the sealed cylindrical tank 1 and the screen 10. The opening of the screen 10 stretched around the periphery of the second separation chamber 5 is 10 to 20 mm. Only the contaminants harmful to the nozzle for spraying which cleans the pump water tank etc. in the next process are removed. The scum of light specific gravity that flows into the second separation chamber 5 together with the water is captured by the screen 10, and the water from which the slag has been separated flows into the separation water chamber 11. An extraction pipe 12 is connected to the sealed cylindrical tank 1 on the peripheral wall of the separation water chamber 11, and the separated water from which the residue has been separated is drawn out by the internal pressure of the sealed cylindrical tank 1. Since the sealed cylindrical tank 1 having a sealed structure can use the residual pressure, it does not require a pump for feeding separated water or for feeding pressure. Wash water from which impurities have been removed can be sent to the nozzle for injection in the next step.

FIG. 2 is a vertical cross-sectional view of the upper part of the sealed cylindrical tank, and a packing box 13 containing a packing is disposed at the center of the top wall 1 c of the sealed cylindrical tank 1. The main shaft 14 is suspended in the second separation chamber 5. A pair of arc-shaped scrapers 16 and 16 are inclined and fixed to a support rod 15 disposed horizontally at the lower end of the main shaft 14. A scraper edge 16 a of the scraper 16 is slid on the screen 10. As shown in FIG. 1 are protruded upper end of the main shaft 14 of the scraper 16 from the top wall 1c of the closed cylindrical vessel 1, a horizontal state of the driven shaft 18 via the Beberugi Ya over 17 to the main shaft 14 Further, it is connected to a drive shaft 20 that is suspended from the driven shaft 18 via bevel gears 19 and 19. A handle 21 is fixed to the lower end of the drive shaft 20 so that the scraper 16 can be operated from the vicinity of the peripheral wall 1b of the sealed cylindrical tank 1 as necessary.

  As shown in FIG. 2, the foreign matter captured by the screen 10 is scraped by the screw action of the scraper 16 slidably contacting the screen 10, and the residue is pushed up to the top wall 1 c of the sealed cylindrical tank 1 and clogged. To prevent. The screen 10 of the second separation chamber 5 only needs to be removed with a light specific gravity, and the scraper 16 that prevents clogging can be easily scraped off. The screen 10 needs a backwashing device when various specific gravity objects are mixed, but in the present invention, since there is little mixture of foreign substances having different specific gravity, it is not necessary to provide a backwashing device. In addition, although illustration is abbreviate | omitted, a scraper 16 may be rotated electrically by interlockingly connecting a drive machine with the upper end part of the main shaft 14 instead of manual operation. FIG. 3 is a plan view of the sealed cylindrical tank, in which an inspection window 22 is arranged on the top wall 1c of the sealed cylindrical tank so that the inside of the second separation chamber 5 can be seen, and the screen 10 is clogged. The situation can be grasped.

  As shown in FIG. 1, a drain pipe 23 is connected to the top wall 1 c of the sealed cylindrical tank 1, and a downcomer 24 connected to the drain pipe 23 is suspended below the sealed cylindrical tank 1 to form a siphon pipe 25. It is. An opening / closing valve 26 is interposed at the lower end of the downcomer 24. If the opening / closing valve 26 is opened, the residue floating above the second separation chamber 5 is transferred to the drainage pipe 23 by the internal pressure of the sealed cylindrical tank 1. Can be extruded. The downcomer 24 connected to the drainage pipe 23 is subjected to negative pressure due to siphon action to increase the flow rate of the drainage and facilitate the extraction of the residue. The drainage process of the levitated residue can be performed even during operation of the dust removing device for separating impurities.

  The dust separating apparatus for separating impurities according to the present invention forms a cyclone in a sealed cylindrical tank, and separates a dust having a high specific gravity in a first separation chamber that separates heavy impurities and a second portion that separates a light residue, etc. Since the separation chamber is installed, only the lighter specific gravity needs to be removed by the screen of the second separation chamber, and scraper scraping to prevent clogging is easy. Therefore, it becomes possible to separate impurities from the raw water in rainwater pumping stations such as sewage and water purification plants, and large contaminants that supply cleaning water to pump water tanks and other equipment that require large amounts of cleaning water. It can be used as a dust removal device for separating objects.

It is a principal part longitudinal cross-sectional view of the dust-removing device for separating foreign substances according to the present invention. Similarly, it is a longitudinal cross-sectional view of the upper half of the sealed cylindrical tank. Similarly, it is a top view of a sealed cylindrical tank.

DESCRIPTION OF SYMBOLS 1 Sealed cylindrical tank 1a Tank bottom 1b Perimeter wall 1c Top wall 2 Partition wall 2a Opening 3 Overflow nozzle 4 First separation chamber
5 Second Separation Chamber 6 Supply Pipe 7 Underflow Nozzle 8 Discharge Pipe 10 Screen 11 Separation Water Chamber 12 Take-out Pipe 14 Spindle 16 Scraper 17, 19 Bevel Gear 18 Driven Shaft 20 Drive Shaft 23 Drain Pipe 24 Downcomer Pipe 25 Siphon Pipe

Claims (2)

The raw water supply pipe (6) is disposed in the tangential direction on the peripheral wall (1b) of the sealed cylindrical tank (1), and the tank bottom (1a) is formed in a conical shape to connect the sedimentation discharge pipe (8). In the separation apparatus for foreign substances provided with a separation liquid take-out pipe (12) at the top, the sealed cylindrical tank (1) is separated from the first separation chamber (4) by a partition wall (2) having an opening (2a) at the center. And a second separation chamber (5), a funnel-shaped overflow nozzle (3) is disposed in the opening (2a), and the peripheral wall of the sealed cylindrical tank (1) constituting the first separation chamber (4) ( 1b) is provided with a supply pipe (6) and an underflow nozzle (7) at the tank bottom (1a), and a screen (10) concentrically with the sealed cylindrical tank (1) in the second separation chamber (5). and arranged, rotatable scraper (16) is formed in an arc shape is inclined to a screen (10) is Suri設, screen (10) Outwardly separated water chamber to form a (11), connecting the take-out pipe (12) to the separation of water chamber (11), the top wall of the sealed cylindrical vessel constituting the second separation chamber (5) (1) (1c The drain pipe (23) connected to the drain pipe (23) is connected to the downcomer pipe (24), and the downcomer pipe (24) is suspended to form an inverted U-shaped siphon pipe (25) . Dust removal device. A main shaft (14) connected to the scraper (16) is projected from the top wall (1c) of the sealed cylindrical tank (1), and a horizontal driven shaft (18) and a driven shaft (18) are connected to the main shaft (14). ) to be vertically shaped drive shaft (20) connected via respective Beberugiya (17, 19), claims, characterized in that performing an operation from the peripheral wall near the scraper (16) of the closed cylindrical tank (1) The dust removing apparatus for separating foreign substances according to 1 .

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