Classifications

• • E—FIXED CONSTRUCTIONS
  • E03—WATER SUPPLY; SEWERAGE
  • E03F—SEWERS; CESSPOOLS
  • E03F7/00—Other installations or implements for operating sewer systems, e.g. for preventing or indicating stoppage; Emptying cesspools
  • E03F7/10—Wheeled apparatus for emptying sewers or cesspools

Definitions

• the present invention relates to a method of removing and purifying sludges and waste water according to the preamble of claim 1. Also, the present invention relates to a device designed to remove and purify sludge and waste water accor- ding to the first device claim.
• the object of the present invention is to create oppor ⁇ tunities for a less time and energy consuming handling of waste water.
• Another object of the invention is to, in several other respects, develop the state of the art in this field.
• Fig. 1 a first embodiment of a mobile device according to the invention in a lateral view
• FIG. 2 a second, preferred embodiment of such a device in a lateral view
• Fig. 3 a third, also preferred embodiment of such a device in a lateral view
• Fig. 4 a view from above of the device according to Fig. 3;
• Fig. 5 a perspective view of a drum screen, which is a compo ⁇ nent of at least some of the above-mentioned devices;
• Fig. 6 is a lateral view of a drum filter, which is a compo ⁇ nent of at least some of the above-mentioned devices;
• Fig. 7 is a lateral view of an ejection nozzle, which is a component of said devices.
• a device 1 which e.g. is mobile, particu ⁇ larly a tank truck, on the platform 2 of which a unit 4 for course separation and a unit 3 for fine separation are moun ⁇ ted.
• the exterior of the latter can be designed as a sedimen ⁇ tation basin, while the former includes a filter 23 and a sludge press 5.
• a tank 6 can be mounted below unit 4 as well as a distribution equipment, not shown in- etail, for precipi ⁇ tation chemicals.
• the sludge press and the screen are connec ⁇ ted to each other through a passage 7 and the screen and unit 3 through a passage 8, while a compressed-water conduit 18 is connected to a well 10, which contains sludge and waste water and a transport conduit 9 connects the well to unit 4.
• a ski table box 11 is positioned, from which one or several conduits 12, through closed or perfora ⁇ ted partitions 16, lead to the suitably laterally positioned lower areas of the basin, namely the so called reject water compartments 19, from which one or several conduits 14 via a pump 22 lead to compressed-water conduit 18, while one or se ⁇ veral conduits 13 are designed to transport separated impuri ⁇ ties back to unit 4.
• the entire process preferably is remote- controllable by means of a radiocontroll unit 15.
• a preferred working cycle is performed in the following way: purified water from compartments 19 is pumped by means of pump 22 via conduits 14 and 18 to an ejector nozzle 17, which is mounted at the free end of the latter conduit and immersed into e.g. a three-compartment septic tank and in which the pressurized water is injected into the inlet by conduit 9, a strong suction effect being obtained, which pulls along the waste water and sludge present in the well, which subse ⁇ quently are transported to coarse separation unit 4 , which can be designed as is shown in Fig. 5 and is described more in detail in the following.
• the screen suitably is designed as a rotary drum 23. That waste water, from which coarse impurities have been removed in unit 4, i.e. the pre- purified waste water, is subsequently transported to unit 3. On its way precipitation chemicals suitably are added in order to precipitate e.g. phosphorus and possibly also nitrogen, in addition to the suspended material, from the waste water. The precipitation of the flocculated material must be done quickly and consequently a turbulence to some extent in the conduit to the fine separation unit is required.
• precipitation chemicals suitably are added in order to precipitate e.g. phosphorus and possibly also nitrogen, in addition to the suspended material, from the waste water.
• the precipitation of the flocculated material must be done quickly and consequently a turbulence to some extent in the conduit to the fine separation unit is required.
• the water subsequently is lead into the central portion of unit 3, in which the flocculated material is allowed to de ⁇ scend to the bottom and in which the water, which in this way has been purified to a greater extent, is allowed to flow over from ski table box 11 in order to be lead,through the lateral walls 16, suitably solely via conduits . ' .12, to the reject water compartments.
• the purified water is used, as has been mentioned, to drive the ejection device. The excess can be returned to the well. It is e.g. possible to evacuate and purify the entire contents of a well and subsequently or con ⁇ tinuously bring back the purified water.
• the word "continu ⁇ ously” means , that the restoration of purified water can be done also before the sludge suction operation is concluded.
• Coarse impurities accumulated in the drum screen and chemical sludge brought back to the drum screen are concentrated and brought to the sludge press, which suitably is actuated at the same time as the drum screen, and subsequently the sludge press is run intermittently.
• the compressed waste material can be collected in e.g. plastic bags and the press water can be recycled to the process.
• the embodiment shown in Fig. 2 is similar to the preceding one. However, the fine separation is not done via a ski table box but is done by means of a drum screen 20.
• the drum screen comprises a drum 21 having a pervious, e.g. perforated sup- port surface 24, which is covered by a filter cloth 25.
• drum screen 23 which according to Fig. 5 comprises a perforated drum 31 having an internally fastened feed screw 26.
• the drum is inclined towards inlet 27 with e.g.
• outlet 28 at a higher level, is designed to feed out separated coarse im ⁇ purities, or a so called sludge, which on its way to the out ⁇ let is dewatered continuously and subsequently falls out through a collection funnel 29, which is mounted below the outlet, from which it is transported further, e.g. through the gravitation, to sludge press 5, in which an automatic de- watering takes place and a so called susage is built, which subsequently is collected in e.g. plastic bags.
• the reject water from the sludge press and also the water, which flows through the screen drum, are collected, e.g.
• Pas ⁇ sage 8 can be connected to conduits 33,34 from dosing devi- ces, not shown, for chemicals of the type mentioned, which are fed from tanks 6, as has already been mentioned.
• a pump 35,36 can be mounted in each one of conduits 33 and 34 re ⁇ spectively and belongs to the dosing device, which is not shown for the rest but is known in principle.
• drum filter in Fig. 3 is mounted with its longitudi ⁇ nal direction perpendicular to the longitudinal direction of the vehicle or the like, which carries the purification de ⁇ vice, in Fig. 2 it is mounted in the longitudinal direction of the vehicle.
• the principal construction can be the same. It is shown in Fig. 3, that the coarsely purified water, by means of pump 32, is pumped from container 31 to unit 3, which all around is designed as a mainly closed con ⁇ tainer, in which the coarsely purified water surrounds the drum filter and passes through its cloth and perforations, fine solid or semi-liquid particles being separated.
• the wa ⁇ ter which has been filtered in this way, subsequently flows from the interi or of the drum filter via a hollow shaft 37, which is positioned at the end of the filter, and a vertical shaft 38 (see also Fig. 6), up to an outlet 39 and is dis- charged into a reject water tank 19.
• the accumulation of par ⁇ ticles on the filter cloth reduces the perviousness of the cloth and the water surface level in unit 3, which also can be called a filter chamber, increases.
• a level control is actuated and ac- tivates , in a mechanical or preferably in a electronical:.;- way, a filter cleaning process, which is done through a suc ⁇ tion with a nozzle 41, which is engaging the drum in the form of a ramp along the entirety of the drum, stuck partic ⁇ les being sucked by means of a pump 42 but also surrounding water and even water from the interior of the drum, which is sucked through the cloth, which in this way is rinsed efficiently.
• This sucked-off mixture can, via a passage 43, be restored to unit 4. Since the drum, which is driven by a motor 44, is rotating during the purification phase, a comprehensive efficient cleaning is accomplished.
• a minimum level 45 is shown; when this level is reached, the purification device can be stopped, while a security outlet 46 can be used, in case outlet 39 is blocked up.
• nozzle 41 or pump 42 has an arm 47, which extends downwards to the area below the drum.
• This arm is an auxiliary nozzle, possibly in the form of a ramp, designed to suck off accumulations of impurities below the drum.
• This auxiliary nozzle suitably can be connec ⁇ ted separately.
• Nozzle 41 can be fastened and adjusted respec- tively in various positions by means of fasteners 48 and 49 respectively.
• nozzle 17 is provided with fasteners for conduits 9 and 18, the former having a larger diameter in order to hold the two types of medium, i.e. pres ⁇ surized water Q.. and waste water-sludge Q_ .
• Nozzle 17 has a jet 51. This jet is provided with surrounding outer restric ⁇ tions at a distance, which can be perforated or have meshes.

Landscapes

• Health & Medical Sciences (AREA)
• Life Sciences & Earth Sciences (AREA)
• Engineering & Computer Science (AREA)
• Hydrology & Water Resources (AREA)
• Public Health (AREA)
• Water Supply & Treatment (AREA)
• Filtration Of Liquid (AREA)
• Treatment Of Sludge (AREA)
• Biological Treatment Of Waste Water (AREA)

Applications Claiming Priority (2)

Publications (2)

Family

ID=20373446

Family Applications (1)

Country Status (7)

Cited By (3)

Families Citing this family (12)

Family Cites Families (5)

• 1988
  • 1988-09-27 SE SE8803405A patent/SE8803405D0/xx unknown
• 1989
  • 1989-09-27 DE DE8989910950T patent/DE68905194D1/de not_active Expired - Lifetime
  • 1989-09-27 AU AU43266/89A patent/AU4326689A/en not_active Abandoned
  • 1989-09-27 WO PCT/SE1989/000524 patent/WO1990003474A1/en active IP Right Grant
  • 1989-09-27 EP EP89910950A patent/EP0437465B1/de not_active Expired - Lifetime
• 1991
  • 1991-03-22 DK DK199100513A patent/DK172496B1/da not_active IP Right Cessation
  • 1991-03-22 NO NO911152A patent/NO309617B1/no not_active IP Right Cessation

Non-Patent Citations (1)

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