WO2019103592A1 - Automatic, piston-type, deep-bed static clarifier - Google Patents

Abstract

The present invention relates to an automatic, piston-type, deep-bed static clarifier in a rectangular tank which comprises an inlet of water to be treated and a clarified water outlet, which integrate means for extracting sludge and scum, characterised by comprising a bottom wall that defines a plurality of tapered settling tanks delimited by vertical deflectors arranged parallel to one another at different heights and across the width of the rectangular tank, which in turn define a piston-type linear flow in order to force the flow in a single rising-falling direction; in which the sludge settles and deposits at the bottom of each tapered settling tank and wherein a settled sludge suction bell is provided, connected to a submersible axial pump that sucks up the sludge and guides it through a pipe towards a network of sludge discharge ducts; said clarifier also incorporates at the top a self-adjustable bidirectional skimmer for removing floating scum that comprises a collection channel and a submersible pump for pumping the floating scum towards the network of sludge discharge ducts; also comprising a disinfection module with UV lamps and an outlet for clarified and disinfected water.

Description

 STATIC CLARIFIER OF DEEP BED, AUTOMATIC,

 PISTON TYPE

FIELD OF THE INVENTION

The present invention falls in the field of wastewater treatment; in general it is related to the means and devices used in wastewater treatment plants and more specifically it is referred to a static, deep bed, automatic, piston type clarifier.

BACKGROUND OF THE INVENTION

Biological processes, both aerobic and anaerobic, are widely used in the treatment of wastewater for sanitation; The aerobic processes are usually carried out in the upper part of water treatment tanks, where aerators are required to aerate the water; for this, biological contact rotors (RBC) are used, which in the first stages performs the degradation of the remaining organic matter of the water coming from an anaerobic treatment and in the last stages it allows the growth of different nitrifying bacteria (nitrosomes and nitrobacter) that convert the ammoniacal nitrogen in nitrites and later in nitrates that will become nitrogen gas in the anoxic zone. The degradation of organic matter in the biological processes of wastewater treatment for sanitation generates foams, fats, and creams that float on the surface of the water in tanks, ponds, or other deposits destined for this purpose. There are various equipment in the market that perform the same function, but in a different way and their structures, construction, configuration and ways of operating are very different from that of the present invention. They are known, for example, by their skimming trade names such as the Delta Skimmer, Scum Pipe, Scum Skimmer, among others, which are inefficient due to the fact that they extract creams together with a lot of water, which means that additional equipment has to be acquired to make a more thorough separation between suspended solids and the water for its final disposal.

On the other hand, ultraviolet (UV) light has been used since the beginning of the last century as a reliable and safe disinfection system with reduced environmental costs in water treatment. The shortage of fresh water has driven sustainable technologies to meet the growing demand for clean and sanitary water.

One of the main advantages of water treatment with ultraviolet light is the absence of chemical residues and byproducts of disinfection.

An ultraviolet disinfection system is conceptually simple, it consists of a UV radiation chamber, one or more lamps ultraviolet lamps installed inside quartz protective tubes in contact with water, sensors and an electrical cabinet for power and control of the UV system.

The existing UV disinfection equipment is a closed type, which implies another type of structure and dimensions for its installation as well as the conduits or pipes that will carry the water to it and discharge or exit; open-type ones are also on the market, but for the functionality of these, a concrete construction has to be carried out for the installation of UV lamps and channels for water entry, which implies a larger area for the functionality of it and its infrastructure is larger so its cost is higher.

On the other hand there are clarifiers of circular and rectangular shape in the market. The clarifiers are the most common.

Secondary cyanders are processing units subsequent to the biological process used in the treatment of wastewater and can be classified into circular and rectangular. They are designed to separate the treated water from the one that escapes with it in the biological process.

In circular clarifiers the water enters ascending through the center and is collected in a perimeter channel. The circular clarifiers are of greater use, because they facilitate the work of maintenance and purging of sludge. They have a diameter that ranges between 10 and 60 m. The water is entered through a hood or effector located in the center of the unit that forces the water to enter the lower part and, in addition, works as attenuator of the flow energy, eliminating turbulence that may affect the decantation of the particles.

The water is collected by a perimeter channel, to ensure a homogeneous outlet of the clarified effluent in each linear meter of the periphery of the tank. Additionally, a deflecting sheet or wall that prevents the most superficial portion of the water from flowing out, which carries solids, foams and other floating objects, is also projected before the water leaves.

The iodine scavenging system is carried out through a mobile bridge that moves slowly throughout the decanter and that has scrapers in its bottom that push the sludge towards the sludge well, which is located in the center of the tank circular. Additionally, this same bridge has on its surface a sheet, known as a skimmer, which drags the floating material to the grease hopper or foam collector.

As for the rectangular clarifiers, the water enters at one end and is extracted at the opposite end. They are much less used than circular ones. The wastewater is introduced through a landfill with a front baffle that allows entry through the lower part of the unit and decreases the flow energy. For the outlet of the effluent, at the opposite end, it is used a jagged weir. The sludge and the cream are pushed by dredges attached to a mobile bridge that moves along the unit. Another option is the use of harrows driven by an endless chain,

The construction process of circular tanks tends to be complex and expensive, and requires a long time of supervision, unlike rectangular tanks that require a simpler civil work. However, the volume of a circular tank would require another type of criterion so that the linear flow would fulfill the purposes of sedimentation and decantation. Lack of space or area destined for these process units. A complex mechanical equipment for the control and management of sludge, floating and cream.

Both types of clarifiers described involve complexity for their operation and maintenance of a large amount of electromechanical equipment, in addition they represent a higher cost of operation and maintenance.

 A search was made to determine the state of the closest technique, finding the following documents:

Chinese patent document CN106277311A (designated as document D1) of Zhao Xiaodong, dated October 21, 2016, which discloses an up-flow anaerobic sludge diversion reactor, which refers to an anaerobic reactor, was found. iodo bed which includes tanks, lid, slag separator, liquid phase turn separators, water distribution components. The water distribution means comprise an inlet water distributor, and an exhaust water separator.

In FIG. 1 the reactor shows a conical bottom, inlet water distribution pipes 2, 3, an end deflector 4, nozzle 5, 8, sludge reaction zone 7, wastewater deflector 8, cylinder separator 9, bus chamber 10, gas outlet 11, 12, slag pipe 13, slag pipe support 14, slag discharge pipe 15, slag hole 16, gas cylinder 17, cover plate 18, beams 19, exhaust port 20, exhaust pipe 21, outlet 24, wastewater sedimentation zone 25, interior ventilation ring 26, a reflecting plate 27, a cover plate reflection 28, the gas inlet from the outside 29, mud pipes 31, an interception chamber 32, waste water flow path 34, mud return direction 35, sludge and waste circulation path 38, circulation direction of sludge and waste water 37, the reservoir flange 38, waste diverting slit 39, the slit 40 return of iodine, intercepting two chambers 41, 42 a Intercept gas chamber three sewage direction 43.

Document D1 does not disclose, nl suggests a static, deep-bed, automatic, rectangular tank-type clarifier that integrates the different components, in a similar arrangement, form of operation and efficiency as that of our invention.

Also located is US Pat. No. 4,931,175 (called document D2) of Krofía Mitos, dated September 7, 1988, disclosing a water clarifying apparatus having a cylindrical tank in which contaminating particles suspended in water are separated. crude using flotation techniques, with a set of concentric spaced concentric plates placed mutually in the flotation tank. The plates rotate around the tank, preferably in unison with a header (i) that distributes equal amounts of raw water to each annular zone in the tank defined by the conical plates and (P) a shovel to remove the contaminants that form a layer of water. a floating mud. A screw conveyor is located in a discharge tube of the floating mud bucket. A mud infrared detection set in a window on the side wall of the tank detects the mud-water interface. Air-dissolving tubes that operate in parallel have common feeds and discharges coupled through three-way valves operated to pressurize a closed volume of water with pressure air into one tube while recharging and discharging the other tube.

Document D2 also does not reveal, nl suggests, nl in its entire description, nl in its figures a static, deep-bed, automatic, piston-type rectangular tank clarifier that integrates the remaining components, in a similar arrangement, form of operation and efficiency like that of our invention,

Another localized document is US Pat. No. 5,124,034 A (called document D3) of Maness, Ronald C, dated February 28, 1991, which discloses systems for the purification of liquids containing suspended solids and / or materials. dissolving solids of the type that basically include a conical flocculation unit and a conical joint clarification unit. The flocculator has a cylindrical lower part, a frustoconical intermediate portion and a large diameter cylindrical upper portion, while the clarifier is essentially a large diameter cylindrical upper portion on a lower frustoconical portion. The water or other liquid to be purified enters the lower part of the flocculator through opposite nozzles of unequal size to assume a belicoidal flow upwards beyond a series of baffle plates located on the upper part of the lower part of the flocculator while forms a mud blanket. A double row groove installation located at the junction of the flocculator with the clarifier separates the solids from the liquid as the fluid flow from the flocculator passes to the clarifier where it is further separated from the clarified liquid sludge with part of the sludge. it recites to the flocculator.

Note that the invention is an association of a conical flocculation unit and a joint conical clarification unit; but the clarifier does not have the same structural configuration, does not understand the same elements, nl in the same disposition, nor with the same functions as the clarifier of our invention.

Another of the documents that were located and cited as reference is US Patent Application No. US 20150183658 A (referred to as document D4) by Terry Wright et al, dated December 27, 2013, which discloses a system of Decanter with vertically adjusted sieve to replace landfills of stationary or pivoting effluents in water clarifiers and sedimentation basins. The sieved decanter does not have a physical pourer and instead relies on maintaining a desired flow by varying the depth of immersion of a filtered box in a controlled manner. The decanter rises periodically in a hood that provides cleaning by spraying and disinfecting the filtered box. The system is capable of removing up to 85 percent of the BOD in a wastewater stream,

 As can be seen in the appended figure and in the summary of said document D4, it does not disclose, nl suggests a static, deep-bed, automatic, rectangular-tank type piston clarifier like the one of the present invention, does not have the same structural configuration, does not include the same elements, nl in the same provision, nl with the same functions as the clarifier of our invention.

It was located palette FR2676045 A1 (denominated as document D 5) of Gilíes Craisson of May 3, 1991, which reveals a process for the automatic recycling of sludge in purification stations using surface oxygenation. The invention allows the oxygenation turbine, which is operated by an electric motor, is also able to perform suction work, in order to recycle the sludge from an adjacent clarifier. The principle consists of connecting the oxygenation tank and the clarifier through a smooth connecting tube inclined between 15 and 60 ⁰ with respect to the vertical. This tube starts in the suction duct that is below the turbine and as close as possible to the surface to take advantage of the suction created by the turbine. Your nozzle is as deep as possible in the clarifier to be able to recapture the separated sludge at the bottom of it. This device finds its application in the treatment of aqueous effluents of iodine type, for works of any size,

Document D5 also does not reveal, nl suggests, in its entire description, nl in its figures a static, deep-bed, automatic, piston-type rectangular tank cycler that integrates the different components, in a similar arrangement, form of operation and efficiency as that of our invention

According to the cited documents, there is not enough evidence in the information disclosed in documents D1 to D5, so that the novelty of the invention to be protected is affected, nor is there sufficient evidence for a person with average knowledge in the matter it can infer or deduce in evident form, on the basis of the information disclosed in the documents D1 to D5 by themselves or their combination, the static clarifier of deep bed, automatic, piston type that is intended to protect and therefore the invention has activity inventiveness over said documents.

In view of the need to have a deep, automatic, piston-type static bed clarifier that solves the drawbacks described, the present invention was developed which allows for the sedimentation of particulate and the elimination of floaters in a practical and effective way, OBJECTIVES OF THE INVENTION

The main objective of the present invention is to make available a deep, automatic, piston-type static bed clarifier in which the water enters at one end and is extracted at the opposite end following a piston flow which involves the circulation of water through of a duel of rectangular profile fulfilling a constant and uniform speed in any cross section normal to the global movement of the fluid, and that allows the sedimentation of particular and the elimination of floating in a practical and effective way to offer highly clarified water.

 Another object of the invention is to provide said static, deep bed, automatic, piston-type bed clarifier, in addition to the elimination of settled sludge and of foams, fats, and creams that float on the surface of the water.

Another object of the invention is to provide said static, deep-bed, automatic, piston-type static clarifier, which is also structurally simple, easy to operate and maintain.

BREVE DESCRIPTION DEL INVENTO l clarificador estático de cama profunda, automático, tipo pistón en tanque rectangular de conformidad con la presente invención consta de un panel de fondo que define una pluralidad de sedimentadores cónicos contiguos delimitados por una pluralidad de deflectores veríicaies dispuestos paralelos entre sí con diferente altura y a lo ancho del tanque rectangular; que definen un flujo lineal tipo pistón para forzar el flujo en una sola dirección ascendente-descendente; en donde en el fondo de cada sedimentador cónico se precipitan y depositan los iodos y donde se dispone una campana de succión de lodos precipitados conectados con una bomba axial sumergible que succiona los lodos y ios conduce a través de una tubería hacia una red de ductos de descarga de lodos. And all those qualities and objectives that will become apparent when making a general and detailed description of the present invention supported by the illustrated modalities.

BRIEF DESCRIPTION OF THE INVENTION The static, deep-bed, automatic, piston-type rectangular tank clarifier according to the present invention consists of a bottom panel defining a plurality of contiguous conical settlers delimited by a plurality of verifiable deflectors arranged parallel to each other with different height and width of the rectangular tank; which define a piston-type linear flow to force the flow in a single ascending-descending direction; where at the bottom of each conical sedimentator the iodine is precipitated and deposited and where a suction hood of precipitated sludge is connected with an axial submersible pump that sucks the sludge and leads it through a pipeline to a network of pipelines. discharge of sludge.

Said clarifier integrates a water inlet to be treated and a treated water outlet; wherein the water inlet to be treated is disposed on one side of the rectangular tank in the first section where the first conical settler is defined and the treated water outlet is disposed in the last conical settler. The static clarifier also integrates in the upper part a self-adjustable bidirectional skimmer for the elimination of solids, foams and other floating objects, and a disinfection module with UV lamps; where the water enters the UV disinfection module from the front, travels inside the equipment, and exits again from the front towards the outside of the tank.

HP que permiten el paso de sólidos de hasta 48 mm, con una capacidad de 0.8 m³/mín a una carga de 2 m, Dichos defiectores verticaies están fabricados preferentemente de PEAD (Polietileno de alta densidad) que funcionan como defiectores para forzar el flujo en una sola dirección ascendente-descendente. These conical settlers are made of FRP (glass fiber reinforced polyester); The submersible axial pumps are preferably

HP that allow the passage of solids of up to 48 mm, with a capacity of 0.8 m ³ / min at a load of 2 m, These deficators verticaies are preferably made of HDPE (High Density Polyethylene) that function as defiectors to force the flow in a single ascending-descending direction.

Said deep bed static clarifier further comprises a turbidity monitoring module consisting of an acrylic or glass tube at the ends of which a connection flange is fixed where the acrylic tube is fastened by a pair of clamps to a base and comprising the minus a hexagonal type optical sensor with digital outputs that sends the signal to a fixed fiber optic sensor amplifier in a base where a register box is also fixed,

Said turbidity monitoring module allows moniiorear through of said acrylic tube the degree of urbidity that water has when passing through this acrylic tube to determine the amount of sludge that is flowing. Once the water begins to pass with less degree of turbidity (lighter) it means that the amount of sludge has already been removed, so that the amplifier sends a signal to the register box to shut off the corresponding submersible axial pump. The start of each submersible axial pump is independent and one at a time, that is, it is not possible to start two or more devices at the same time. The starting time between each submersible axial pump cycle is determined by the time value programmed in the recording box, while the stop depends on the signal coming from a monitoring module (not shown).

In order to better understand the characteristics of the invention, the present description is accompanied, as an integral part thereof, by the drawings, which are illustrative but not limitative, which are described below.

It is a self-adjusting, compact device, which with minimum energy use and no dredges nl mobile parts offers superior results in the separation of solids and water quality.

 BRIEF DESCRIPTION OF THE FIGURES

Figure 1 shows a front perspective view of the static, deep bed, automatic, piston-type rectangular tank clarifier that exhibits a cut in its walls. Figure 2 shows a front-top perspective view of the static, deep-bed, automatic, piston-type rectangular tank clarifier exhibiting a cut in its walls. Figure 3 illustrates a conventional perspective of a vertical deflection that delimits the areas of the settlers.

Figure 4 shows a top perspective view of the static, deep bed, automatic, piston-type rectangular tank clarifier exhibiting a cut in its walls.

Figure 5 illustrates a conventional perspective view of an axial flow pumping equipment for the extraction of sedimented sludge in the conical settlers,

Figure 6 illustrates a conventional perspective view of a turbidity moni- toring module to monitor the degree of turbidity that water has and on the basis of eyl determine the amount of sludge that is flowing and for the control of the axial pumps. of the axial flow pumping equipment.

 For a better understanding of the invention, a detailed description will be made of some of the modalities thereof, shown in the drawings that are annexed to the present description with non-limiting illustrative purposes,

DETAILED DESCRIPTION OF THE INVENTION

The characteristic details of the static bed clarifier deep, automatic, piston type in rectangular tank, are clearly shown in the following description and in the illustrative drawings that are attached, serving the same reference signs to indicate the same parts.

With reference to figures 1 to 5, the static, deep bed, automatic, piston-type rectangular tank clarifier (1) consists of a bottom panel (2) that defines a plurality of conical sedimenters (3) delimited by vertical deflectors ( 4) arranged parallel to each other with different height and width of the rectangular tank (1), which define a linear flow type piston to force the flow in a single ascending-descending direction (illustrated with arrows in Figure 1); where in the bottom (5) of each conical settler (3) the sludges (6, see Fig. 1) are precipitated and deposited and where a suction hood (7) of precipitated sludge (6), connected with a submersible axial pump (8) that sucks the sludge (6) and conducts it through a pipe (9) to a network of sludge discharge ducts (10). Said clarifier integrates a water inlet to be treated (11) arranged on one side of rectangular tank (1) in the first section where the first conical settler (3) is defined.

The static clarifier also integrates in the upper part a bi-directional self-adjusting skimmer (12) for elimination of creams (12a) (solids, foams and other floating objects) comprising a collecting channel (13) with a discharge orifice of the collected creams. connects a discharge duct (14) of the creams taken that leads to a collector that houses a submersible pump (15) to pump the cream into sludge discharge duct network (10). Said static clarifier also integrates a disinfection module with UV lamps (16) where the water enters the UV disinfection module through an inlet (17), travels inside the equipment, and exits through a conduit (18) of the part front to the outside of the tank.

Said conical settlers (3) are made of FRP (glass fiber reinforced polyester); Submersible axiai pumps (8) are preferably ½ HP that allow the passage of solids of up to 48 mm, with a capacity of 0.8 m ³ / min at a load of 2 m. Said vertical baffles (4) are preferably made of HDPE (high density polystyrene) which function as deflectors to force the flow in a single up-down direction.

Referring to figures 1, 2, 4 and 6, said static deep bed clarifier further comprises a turbidity monitoring module (19) disposed in an area of the network of sludge discharge devices (10) consisting of a glass or aerofoil tube (20) on the ends of which a connection flange (21) is fixed where the acrylic or glass tube (20) is fastened by a pair of clamps (22) to a base (23) and comprising less a fiber optic sensor (24) hexagonal type with digital outputs that sends the signal to an amplifier (25) for fiber optic sensor {24} fixed on the base (23) where a register box is also fixed (26) .

Said turbidity monitoring module (19) allows to monitor through said acrylic or glass tube (20) the degree of turbidity that the water has when passing through it, to determine the amount of sludge that is flowing. Once the water begins to pass with less degree of turbidity (lighter) it means that the amount of sludge has already been removed, so the amplifier sends a signal to the register box (26) to shut off the submersible axial pump (8) corresponding. The starting of each submersible axial pump (8) is independent and one at a time, that is, it is not possible to start two or more devices at the same time. The starting time between each submersible axial pump cycle (8) is determined by the time value programmed in the recording box (26), while the stop depends on the signal coming from a turbidity monitoring module (19) . With reference to Figure 3, the vertical detectors (4) are preferably manufactured from a frame (4a) defined by rails in a grid arrangement, wherein panels (4b) of HDPE (High Density Polyethylene) are received in each frame. with corners (4c) and that function as defiecers to force the flow in a single ascending-descending direction.

The invention has been described sufficiently for a person with average knowledge in the field can reproduce and obtain the results that we mentioned in the present invention. However, any person skilled in the art who is competent in the present invention may be able to make modifications not described in the present application, however, for the application of these modifications in a certain structure or in the process of manufacturing thereof, it is required of the subject matter claimed in the following claims, said structures should be understood within the scope of the invention.

Claims

CLAIMS Having sufficiently described the invention, the contents of the following claim clauses are claimed as property, 1.- A static, deep-bed, automatic, piston-type rectangular tank clarifier comprising a water inlet to be treated and a clarified water outlet, comprising means for extracting sludge and cream, characterized by comprising a bottom panel that it defines a plurality of conical sedimenters delimited by verticaie defiectors arranged parallel to each other with different height and width of the rectangular tank, which define a piston-type linear flow to force the flow in a single ascending-descending direction; where at the bottom of each conical settler sludge are deposited and deposited and where a suction hood of precipitated sludge is arranged, connected with a submersible axial pump that sucks sludge and conducts it through a pipeline to a pipeline network of sludge discharge; said clarifier also integrates in the upper part a bi-directional self-adjusting skimmer for elimination of floating skins comprising a collector channel and a submersible pump for pumping the creams towards a network of sludge discharge ducts; also comprising a disinfection module with UV lamps with one and one water outlet clarified and disinfected. 2.- The static, deep bed, automatic bed type, rectangular tank type clarifier, according to claim 1, characterized in that it also comprises a turbidity monitoring module arranged in an area of the network of mud discharge duels consisting of a translucent tube at the ends of which is fixed a connection flange where the translucent tube is fastened by means of fastening to a base and comprising at least one fiber optic sensor with digital outputs that sends the signal to an amplifier for fixed fiber optic sensor in the base where a register box is also fixed and which is in communication with the axial suction pumps of sludges to be turned on or off based on the degree of turbidity of the water and sludge in the network of water discharge pipelines, 3, - The static, deep bed, automatic, piston type rectangular tank clarifier, according to claim 2, characterized in that the starting system of each submersible axial pump is independent and the start is programmed in the register box; wherein the stoppage of each submersible axial pump depends on the signal sent by said turbidity monitoring module. 4, - The static, deep-bed, automatic, piston-type rectangular tank clarifier, according to claim 1, characterized in that said vertical deflecors are preferably manufactured from a frame defined by rails in a grid arrangement, wherein each frame is received panels preferably made of HDPE (High Density Polyethylene) fastened with corners and functioning as baffles to force the flow in a single ascending-descending direction. 5.- The static, deep-bed, automatic, piston-type rectangular tank clarifier, according to claim 1, characterized in that said conical sediments are made of FRP (Polyester reinforced with glass fiber), 6.- The static, deep-bed, automatic, piston-type rectangular tank clarifier, according to claim 1, characterized in that the submersible axial pumps are preferably of ½ HP of force that allow the passage of solids of up to 48 mm, with a capacity of 0.8 m ³ / min at a load of 2 m.