RU2169035C2 - Drainage filter - Google Patents

Abstract

FIELD: cleaning water (liquid); drainage, distributing and accumulating systems of water treatment filtering plants; final cleaning of sewage; drainage of silt and sludge platforms. SUBSTANCE: drainage filter includes framework made in form of perforated pipe; perforations of this pipe are shifted in adjacent rows relative to diameter of framework; filter is also provided with couplings located on both sides of framework and porous sleeve manufactures by pneumatic extrusion; this sleeve embraces outer surface of perforated pipe; porous sleeve is made from multi-layer fibrous material at porosity of 80 to 400 mcm; taper perforations have lesser diameter equal to 0.04-0.004 - 0.1 of inner diameter of pipe and larger diameter equal to 0.1-0.2 of outer diameter of perforated pipe; their sizes promote smooth distribution of liquid being cleaned, thus enhancing efficiency and rate of filtering process. Framework of drainage filter is provided with sleeve; one sleeve has external thread and other sleeve has internal thread which are mated. They may be used for connecting several filters for forming drainage distributing system. EFFECT: enhanced efficiency of filtering process at retained through; reduced labor consumption and low cost of assembly work. 2 dwg, 3 dwg

Description

 The invention relates to techniques for treating water (liquids) and can be used for drainage, distribution and prefabricated systems in filtering plants for water treatment and wastewater treatment, as well as drainage in sludge and sludge sites.

 Various types of drainage and filtering devices are widely known, for example, a filter for water purification, comprising a housing with inlet and outlet pipes, horizontal perforated partitions with a filter load located between them and means for compressing the partitions, the filter load being made in the form of ceramic-metal disks laid in layers, and the means for compressing the partitions is in the form of hollow perforated elements of elastic material.

RF patent N 2080297
MKI: 6 C 02 F 1/18 Pub. May 27, 1997 bull. N 15
Patentee: Scientific - Production JSC "ZOYA"
Installation for filtering wastewater, in the casing of which a layer of filtering material is scattered on the support grid. The purified water through the filter layer enters the lower chamber, from which to the riser, and then to the water reservoir for backwashing. A backwash process is provided for cleaning the filter, and if necessary, air is introduced into the space above the grill using a filtration system.

German patent N 4030376
MKI 5 C 02 F 3/00; 3/20; B 01 D 24/10
Pub.byul N7 ISM vol. 38 1993

 Patentee: Steinmann G. m.b.H.

 The flow control element as a filter contains a microporous element with a non-labyrinth pore system of controlled size with a wire spirally wound thereon. The cross section of the coils of wire has a tapering shape, with the wide side of the coil facing outward and the narrow inward, as a result of which the coils are in contact with the edges formed by their wide sides. At one edge of each turn there are microscopic grooves overlapped by the other edge of the adjacent turn. As a spiral-wound wire, a cylindrical tension spring can be used, the turns of which are kept in contact with each other due to its elastic properties.

PCT International Application (WO) N 91/19681
MKI: 5 C 02 F 3/20: Pub. N 2 ISM issue 38. 1993 year

Patentee: Lanmark Consultants Ltd. (Great Britain)
The disadvantage of the above devices is their insufficiently high filtering ability due to the incomplete use of finely porous layers of the filter load.

 Closest to the proposed invention as a technical solution is a drainage device containing a frame in the form of a perforated pipe and a porous sleeve that covers the outer surface of the perforated pipe.

German patent N 3802816 A1
MKI: B 01 D 27/00, 1989

 The above device is not sufficiently high efficiency of the filtering process.

 The technical result achieved using the proposed device includes the simplification of the device, increasing filtering efficiency, as well as reducing the time and cost of installation work.

 The above-described device with a sufficiently high efficiency of the filtration process has a rather complex device, which increases the production time and cost of installation work.

 The aim of the invention is to simplify the device and while maintaining high efficiency of the filtration process, reducing the time and cost of installation work.

 To achieve this goal, a drainage filter containing a frame in the form of a perforated pipe and a porous sleeve made of fibrous material is equipped with couplings placed on both sides of the frame and a porous sleeve made by pneumatic extrusion, and the porous sleeve is made of a multilayer fibrous material with a porosity of 80-400 μm, and conical perforation holes have a smaller diameter of 0.04-0.1 of the inner diameter of the pipe and a larger diameter of 0.1-0.2 of the outer diameter of the perforated pipe.

 The shape of the holes and their sizes contribute to an even distribution of the liquid being cleaned, which in turn increases the efficiency and speed of the filtering process.

 The frame of the drainage filter is equipped with couplings having one external and the other internal mating threads serving as a connection of several filters to obtain a drainage distribution system.

 In FIG. 1 shows a longitudinal section through a drain filter.

 Figure 2 is a cross section of a filter.

 Figure 3 is a General view of the drainage distribution system.

 The drainage filter according to figure 1 and figure 2 has a frame in the form of a perforated pipe 1 with conical holes 2. arranged in rows along the diameter of the frame with an offset of 3 in adjacent rows equal to half the pitch between the holes, each of the holes 2 has a smaller diameter corresponding to 0.04-0.1 of the inner diameter of the pipe and a larger 0.1-0.2 of the outer diameter of the perforated pipe. The number of holes and the diameter of the perforated pipe are determined depending on the operating conditions of the drainage pipes and are calculated parameters.

 The outer surface of the drainage pipe covers a porous sleeve 4, obtained by pneumatic extrusion and representing a multilayer fibrous material with a porosity of 80-400 microns.

 The thickness of the porous sleeve 4, depending on operating conditions, also has a corresponding (calculated) value.

 At the ends of the frame there are two couplings, one of which 5 has an external and the other 6 internal mating threads. The coupling 6 with a female thread has a through hole 7 for the pins.

 Depending on the operating conditions, the drainage distribution system can be mounted from the nth number of drainage films proposed as invention, which serve as modules for this system.

 In FIG. Figure 3 shows a fragment of a system in the form of two modules of drainage filters.

 The last module is equipped with a plug 8. Fasteners 9 serve as a connection of the drainage system with the drainage collector 10. Two types of fasteners are developed - flange and threaded. 11 - drainage filter as a module of the drainage distribution system.

 The drain filter operates as follows: contaminated water (liquid) passes through a porous liner 4 and through conical holes 2 enters the internal cavity of the perforated pipe 1, and the shape and dimensions of the conical holes 2 contribute to a uniform distribution of liquid throughout the filter area (uniformity coefficient m> 0 ,9). From the perforated pipe 1, the purified liquid enters the catchment 10.

 The use of drainage filters as modules provides the creation of a drainage distribution system with an increased degree of purification of the processed liquids by ensuring a high uniformity of liquid distribution over the entire filter area, while the protective filter coating prevents the loading of grains from entering the filter drainage and significantly reduces the removal of small fractions of the load when washing it. In addition, the design of the proposed technical solution dramatically reduces the complexity of the installation of the drainage distribution system, its cost.

 For the drainage distribution system, there is no need for supporting layers. This allows you to increase the thickness of the main filter layer, thereby increasing the dirt capacity of the filter.

 Drain filters are highly resistant and resistant to dynamic loads.

Claims (2)

 1. A drainage filter containing a frame in the form of a perforated pipe and a porous sleeve made of fibrous material, covering the outer surface of the perforated pipe, characterized in that it is equipped with couplings placed on both sides of the frame, the porous sleeve is made by pneumatic extrusion and made of a multilayer fibrous material with porosity 80 - 400 μm, the holes of the perforated pipe are made conical, located along the diameter of the frame with a displacement in adjacent rows equal to half the pitch between the holes, at ohm smaller diameter conical holes is 0.04 - 0.1 tube internal diameter and the larger diameter of 0.1 - 0.2 of the outer diameter of the perforated tube.  2. The drainage filter according to claim 1, characterized in that the clutch of the frame have one outer, the other inner mating threads, used to connect several filters to obtain a drainage distribution system.

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