SK8664Y1 - Device for wastewater treatment - Google Patents

Abstract

A device for wastewater treatment comprises a gravity filter (1), which has a supporting frame in which a wastewater distribution chamber (10) is formed into which the wastewater inlet flows and in which a filtration surface (12) is arranged in the horizontal direction, which is formed by a system of side-by-side ordered rods (120) which are located along their length in the main direction of the wastewater flow. Below the level of the filtration surface (12) there is a filtered water discharge chamber (13) from which the filtered water discharge pipe opens. Above the filtration surface (12) a cleaning device (14) with scraping elements (140) being mounted in the frame of the filter (1) and this being coupled to a drive (3). A sliding surface (19) is assigned to the end of the filtration surface (12) for removing the waste from the filter (1) to the waste conveyor. The waste conveyor is formed by a screw conveyor (2), the inlet opening (20) of which is assigned to the sliding surface (19) of the filter (1) whereby the sliding surface (19) forming the inclined bottom of the transition section (18) between the filter (1) and the screw conveyor (2).

Description

Technical field

The invention relates to a sewage treatment plant comprising a gravity filter comprising a support frame in which a sewage distribution chamber is formed, into which the sewage inlet flows, and in which a filter surface formed in the horizontal direction is formed by a plurality of bars arranged side by side. which are situated by their length in the main direction of the waste water spinning, and below the level of the filtering surface there is a filtered water discharge chamber from which the filtered water discharge pipe opens, above the filtering surface there is a cleaning device with stieracírtti elements wherein the end of the filtering surface is associated with a slip surface for draining the waste from the filter to the waste conveyor.

BACKGROUND OF THE INVENTION

Various sewage treatment plants are known which have different efficiencies, variability and usability.

From CZ 306 659 a gravity sewage filter is known which comprises a sewage inlet and outlet, between which a filter surface is fixedly arranged, above which a cleaning device equipped with at least one glazing element associated with the filter surface is arranged. The filtering surface is formed by a system of spaced-apart poles arranged in the main direction of the waste water flow and thus in the direction of movement of the cleaning device, the rods at their ends at the inlet of the water resting on the filter frame and at their remaining length. free. The wastewater is flowing onto the filter surface through which gravity falls downwards, the trapped impurities, where the smallest size of the trapped impurities is given by the cut wound between the filter surface rods, remain on the surface of the filter surface and the concentrating element. removed. The advantage of such a gravity filter is the high filtration capability at high flow rates even at compact filter dimensions and undemanding design, operation, etc. A disadvantage of such a filter is, however, that if the filter is to be embedded in the sewage conduit or stopped in other parts of the sewage treatment plant, there is a problem with draining the collected impurities from the area behind the overflow, particularly with automatic drainage of these impurities.

Screw conveyors are used to automatically remove impurities from the outlet of a filter or similar device for trapping mechanical impurities from the waste water. They are. although capable of conveying the waste in a vertical or even oblique direction while being able to further drain the waste material during its transport from the filter to the collection container.

DE 4138825 discloses a filter device comprising a screw conveyor in which a helical conveyor blade is rotatably mounted in a tube, the discharge surface of which is inclined by 90 ° to 135 ° with respect to the longitudinal axis of the conveyor and with respect to the conveying direction. This solution allows to increase the angle of inclination of the screw conveyor in the channel while maintaining the uptake and drainage ability, but also increases the pressure of the conveyed material on the tube walls. This improves the degree of dewatering of the conveyed waste by increasing the pressure with which the vane presses the conveyed waste onto the walls of the tube, but at the same time it increases the energy consumption and non-vanish load of the conveyor elements. A further disadvantage is that when the conveyor is situated in a vertical position or a similar position, in the area of the inlet of the waste to the conveyor, due to the unsuitable inclination of the abbreviated conveyor blade, the waste of the scoop or the waste fall out of the conveyor.

A screw conveyor comprising a rotating shaft in a tube is known from CZ UV 16518, and a helical conveyor blade is provided on the shaft having a rounded (hollow) discharge surface, which surface is inclined in the direction opposite the conveying direction in the direction of the axis of rotation of the shaft. · / .: ·. that in the shaft area the displacement surface of the vane ^{1 is} situated in the direction of conveying waste in front of the vane area ¹ at the tube. While this contributes to better drainage of the conveyed waste with reduced stress on the conveyor components and reduced energy consumption, it preserves the disadvantage of eventually collecting the conveyed waste from the scoop in the region of the inlet opening or even dropping the waste material from the conveyor.

The aim of the technical solution is to design a wastewater treatment plant with a gravity filter and a screw conveyor of dirt, which would be efficient, operationally reliable and undemanding, and in addition it would allow installation in confined spaces.

The essence of the technical solution

The object of the invention is achieved by a sewage treatment plant comprising a gravity filter which comprises a support frame in which a sewage separating chamber is formed into which it enters

Waste water inlet, and in which a filtering surface is arranged in the horizontal direction, consisting of a set of side-by-side rods situated along their length in the main direction of the wastewater flow, and below the level of the flushing surface is a drainage chamber of filtered water from which Filtered water pipe, where above the filter surface is located in the filter frame a cleaning device with wiping elements and coupled to the drive, while the end of the filter surface is assigned a slip surface to drain the filter from the filter to the waste conveyor. The inlet is formed by a screw conveyor, the inlet opening of which is associated with the slip surface of the filter, the slip surface forming the inclined bottom of the transition portion between the filter and the screw conveyor.

This arrangement allows efficient operation, is reliable and easy to operate, and also allows installation in confined spaces with high filter performance.

It is preferred that the passage portion taper from the filter to the spiral conveyor.

Advantageously, the filter and / or the screw conveyor are detachably connected to the transition portion.

Advantageously, the screw conveyor comprises a cylindrical tube in which a transport abbreviation coupled to the drive is mounted pivotably about its axis, the inlet of the screw conveyor being arranged at the bottom of the tube, the tube at its bottom opposite the inlet waste material equipped with a drainage surface.

Advantageously, a transport screw is mounted rotatably about its longitudinal axis, which comprises a shaft on which a transport blade of waste material is disposed in the sockets, which has a rounded convex profile of its discharge surface in the direction of the waste material inlet transport.

Preferably, the drainage surface comprises a plurality of orifices having a number and size corresponding to the desired flow rate and the desired filtering parameters, the orifices having a size smaller than the gap size between the rods of the filtering surface.

Advantageously, the rotary drive of the filter cleaning device, which is coupled to the cleaning device, is mounted on the sliver conveyor above the ruarirtóh level of the waste water level.

Advantageously, the rotary drive of the filter cleaning device is coupled to the cleaning device by an articulated shaft and geared angular gears.

Preferably, the rotary drive of the filter cleaning device is coupled to the cleaning device by a chain transmission with a chain.

Advantageously, the rotary drive of the filter cleaning device is coupled to the cleaning device by a toothed meter.

BRIEF DESCRIPTION OF THE DRAWINGS

The technical solution is schematically shown in the drawings, where FIG. 1 is a perspective view of an arrangement according to the invention, FIG. 2 shows a detail of the arrangement of the filter and the transition part, FIG. 3 shows a side view of an arrangement according to the invention, FIG. 4 shows a cross-section of a filter arrangement according to the invention, FIG. 5 is a view of the rear side of the device according to the invention with a cross-section m of the screw conveyor arrangement; FIG. 6 shows a detail of the screw conveyor arrangement in the region of the waste material inlet opening into the screw conveyor, and FIG. 7 shows a detail of the profile of the conveyor blade in the region of the waste material inlet opening into the screw conveyor.

EXAMPLES

The technical solution will be described by way of example of an embodiment of a sewage treatment plant comprising a sewage gravity filter 1 arranged at the inlet of the sewage water, the gravity filter 1 by its outlet of contaminants being connected to the inlet of a vertical or oblique screw conveyor 2. wastewater according to this technical solution.

The gravity filter 1 comprises a carrier in the form of a container 16 in which the individual elements of the filter are arranged

1. A distribution chamber 10 is formed in the vessel 16 into which the waste water supply pipe 11 opens. In the distributor 10 of the chamber 10, a filter surface 12 is arranged in a horizontal or collision near horizontal direction and is formed by a system of side-by-side spacing of the bars 120, which are situated along their length in the main flow direction of the filtered water. in the direction of the screw conveyor 2. The bars 120 have a suitable cross-section, e.g. rounded (round or oval, etc.) or other cross-sectional shape, e.g. square, rectangular, trapezoidal, etc. The bars 120 are either straight or curved downwardly so that the filter surface 12 is either straight or overheated. The rods 120 are supported on the side of the distributor chamber 10 on the filter frame. Next to the distributor; chambers 10

With K 8664-1 below the level of the filter surface 12 there is a pre-filtered water discharge chamber 13 from which the pre-filtered water discharge pipe is shown. Above the filter surface 12, a cleaning device 14 comprising scraping elements 140, e.g. brushes or flexible strips with a straight or toothed front edge, etc., mounted either on a linear sliding device (in the case of a planar filter surface 12), or in the rotary shaft 141 in the case of a curved filter surface 12. on the filter surface 12 and wiped by the cleaning device 14 from the filter surface 12 into the inlet opening 20 of the screw conveyor 2.

The linear slider or shaft 141 is coupled to the drive 3. In the illustrated embodiment, in which the filter surface 12 is folded over and the cleaning device 14 is provided on the shaft 141 with the wiper elements 140, the shaft 141 is coupled to the rotary drive 3. preferably mounted on the tube 21 of the screw conveyor 2, ideally above the level of the anticipated highest level of wastewater, so that the cleaning device 14 can be functional e.g. even when the gravity filter 1 is completely flooded with waste water, depending on the mounting height of the drive 3. In the illustrated embodiment, the drive 3 with the shaft 141 is rotatably coupled by a PTO shaft and toothed gearboxes 30. In a non-illustrated example, us k realisersiaje after hunt 3 with the shaft. 141 is rotatably coupled to a chain or chained toothed belt with corresponding wheels on drive 3 and shaft 141. Operation of the cleaning device 14 is controlled by a level sensor 15 with which drive 3 is also coupled.

At its rear end, the filter container 16 is connected to the tube 21 of the feed conveyor 2 with which it is connected. Since the strainer of the container 1.6 is generally larger than the diameter of the tube 21, the container 16 is connected to the tube 21 by the tapered transition portion 18. The connection of the filter container 16 to the screw stub 21 to the right-hand 2 is either non-detachable or as shown in the drawing. removable, allowing both parts I, 2 to be detached from each other and to handle only one of the two when installing or removing the device. so it is easier to handle the device and can be installed in smaller spaces, where installation of the device in a monolithic production could not be possible. The removable connection of the container 16 to the tube 21 is provided, for example, by forming a dividing line in the seating surface 17 at the rear end of the container 16, wherein the seating surface 17 of the container 16 abuts the abutment surface 180 of the tapered transition portion 18. . A seal is optionally provided between the bearing surfaces 17 and 180.

In a non-illustrated embodiment, the transition portion 18 is part of the filter frame 1 and is detachably connected to the tube 21 of the screw conveyor 2. In another not shown example, the transition portion 18 is a separate body which is detachably connected at one end to the filter 1 and . it is detachably connected to the tube 2 of the screw conveyor 2.

The bottom of the tapered passage portion 18 is inclined in the illustrated embodiment and forms a slip surface 19 of the waste trapped by the filter spike 12 and wiped onto the slip surface 19 with those creeping agents 140 of the cleaning device 14.

An inlet opening 20 of the feed conveyor 2 is arranged in the tapered transition portion 18, the inlet opening 20 being preceded by a sliding surface 19 of the waste trapped by the filtering surface 12 and wiped onto the sliding surface 19 by the wiping elements 140 of the cleaning device 14. The screw conveyor 2 is arranged vertically or obliquely with respect to the vertical direction.

The screw conveyor 2 comprises a cylindrical tube 21 in which a transport abbreviation 22 is mounted rotatable about its axis, which is coupled to a drive 23 which is generally arranged at the upper end of the screw conveyor 2. The drive 23 is coupled to a control device which controls its moments. switching on and off, e.g. depending on the signals of the filter level sensor 15, etc. The inlet opening 20 of the screw conveyor 2 is arranged at the bottom of the tube 21. In its upper part, the tube 21 is provided with an outlet opening 24 of the waste material conveyed by the cross conveyor, e.g. In its lower part, the tube 21 opposite the inlet opening 20 of waste material is provided with a drainage surface 25 which allows the waste water to drain from the interior of the screw conveyor 2 or possibly the excess water. Preferably, the drainage surface 25 comprises a plurality of orifices 25G, the number and size of which correspond to the desired flow rate and the desired filtering parameters, in particular in terms of the predicted water flow and the desired particle size retained by the drainage surface 25, etc. In an unfamiliar embodiment, the drainage surface 25 is also formed on the lower face 26 of the tube 21. However, the openings 250 are generally smaller in size than the gaps between the rods 12b of the filter surface 12.

In the tube 21, a transport abbreviation 27 is mounted rotatable about its longitudinal axis, which includes a shaft 270 on which a transport blade 271 of the waste material is mounted in a screw. The transport blade 271 has a rounded convex profile of its discharge surface 2710, at least in the region of the inlet opening 20. j. of the surface in contact with the waste material during its transport in the transport direction A, which means that the angle α between the tangent t to the transport surface 2710 of the transport vane 271 and the longitudinal axis O of the shaft 270 increases

SK 8664-1 with increasing distance of contact of said tangent with the conveying surface 2710 of the conveyor blade 27 even from the longitudinal axis O of the shaft 270. In the illustrated embodiment, the discharge surface 2710 has a rounded convex profile. ^The conveyor blade 271 has this profile shape either over the entire length of the shaft 270 or only in the region of the inlet opening 20 of the screw conveyor 2, as shown in Fig. 5. For example, by a blade 271 with a pair of profiles along the length of the shaft 270, the shaft 270 is continuous or for each profile of the conveyor blade 271 a separate shaft 270 and the individual such shafts 270 are suitably joined together and their conveyor blades 271 are of different profiles.

In order to limit the ingress of waste material between the outer edge of the blade 271 and the inner wall of the cylindrical shell, in accordance with one preferred embodiment, a clef or a hoop, or other suitable means, is mounted on the outer periphery of the blade 271.

The device operates a paint that the waste water flows into the distribution chamber 10 where it passes. the rod 120 of the filter surface 12 gravitationally falls into the discharge chamber 13 and further flows either into the discharge line or into the channel. The impurities contained in the water are trapped by the filtering surface 12 and are moved by the pressure of the incoming waste water in the direction of the flowing water and in the longitudinal direction of the rod 120 towards the sliding surface 19, thereby increasing the flow capacity of the filter, reducing the need for cleaning the filtering surface. After a certain amount of time, when more impurities are retained on the rods 1, the level of the inflow of water rises to. to the level of the level probe 15, it tends to rotate the scraper elements 140 which wipe the debris trapped on the filter surface 12 beyond the rear end of the filter surface 12 where they fall down and slide down the sliding surface 19 into the inlet 20 of the screw conveyor 2 by means of a transport screw 27 taken into the cup-shaped spaces formed by a special profile of the conveyor blade 271 with a discharge surface 2710 with a rounded convex profile. This profile shape of the conveyor vane 21 prevents the recorded waste material from sliding or falling back into the inlet opening 20 and 20 respectively. Further, by rotating the conveyor screw 27, the waste material is conveyed to the higher portions of the conveyor up to the outlet of the aperture 2.4, from where the waste material is conveyed to the min® conveyor, e.g. into a container, etc.

Claims (10)

C O C IIR A N U CLAIMS Waste water treatment plant comprising a gravity filter (1). comprising a support frame in which a wastewater distribution chamber (10) is formed into which the wastewater inlet opens and in which a filtering surface (12) is formed in a horizontal direction and is formed by a plurality of arranged bars (120) arranged side by side in the main waste water flow direction, wherein a filtered water discharge chamber (13) is provided below the level of the filter surface (12), from which a filtered water outlet pipe is arranged, and a cleaning device (1) is mounted above the filter surface (12). 14) sostieracin by electric (140) and extended (3), the end of the filter surface (12) being associated with a glass surface (19) for draining the filter (1) to the waste conveyor, characterized in that the waste conveyor is a screw conveyor ( 2), whose inlet opening (20) is associated with the slip surface (19) of the filter (1). wherein the slip surface (19) forms the inclined bottom of the transition portion (18) between the filter (1) and the screw conveyor (2). Apparatus according to claim 1, characterized in that the transition portion (18) tapers away from the filter (1) of the mole to the screw end (2). Device according to claim 1 or 2, characterized in that the filter (1) and / or the screw conveyor (2) are detachably connected to the transition part (18). Apparatus according to any one of claims 1 to 3, characterized in that the screw conveyor (2) comprises a cylindrical tube (21) in which a transport screw (22), which is coupled to the drive, is rotatable about its conveyor. (23). wherein the inlet opening (20) of the screw conveyor Erika (2) is arranged in the lower part of the tube (21), the tube (21) being provided with a drainage surface (25) in its lower part opposite the inlet ubi of the waste material opening (20). Apparatus according to claim 4, characterized in that a transport abbreviation (27), which comprises a shaft (270) on which the transporting vane (271) of the waste material, is screwed in, is mounted in the tube (21i). which has a rounded convex profile of its discharge surface (2710) in the conveying direction (A) at least in the region of the waste material inlet opening (20). Apparatus according to claim 4 or 5, characterized in that the drainage surface (25) comprises a plurality of orifices (250) the number and size of which correspond to the desired flow rate and the required filtering parameters, wherein the orifices (250) are " is the size of the gaps between the bars (12.0) of the filter surface (12). Apparatus according to any one of claims 1 to 6, characterized in that a rotary drive (3) of the filter cleaning device (1) coupled to the cleaning device (14) is mounted on the screw conveyor (2) above the maximum wastewater level. ). Apparatus according to claim 7, characterized in that the rotary drive (3) of the filter cleaning device (14) is coupled to the cleaning device (14) by a PTO shaft and gears (30) with gear wheels. Apparatus according to claim 7, characterized in that the rotary drive (3) of the cleaning device (14) of the filter (1) is coupled to the cleaning device (14) with a chain. Device according to claim 7, characterized in that the rotary drive (3) of the cleaning device (14) of the filter (1) is coupled to the cleaning device (14) by a toothed belt.