WO2023128755A1

WO2023128755A1 - A telescopic skimming decanter

Info

Publication number: WO2023128755A1
Application number: PCT/MY2023/050006
Authority: WO
Inventors: Yong Fan JOSEPH
Original assignee: Prestamaju Holdings Sdn. Bhd.
Priority date: 2021-12-30
Filing date: 2023-02-02
Publication date: 2023-07-06
Also published as: WO2023128755A4

Abstract

The present invention relates to A telescopic skimming decanter (100) comprising an electric motor (101), a reduction gearbox (102) connected to the electric motor (101), a pair of screw drive shafts (103), a water container (201) coupled to the pair of screw drive shafts (103) for upward and downward movement, a telescopic pipe (104) and a sleeve pipe (105) coupled to the telescopic pipe (104), characterized in that, the telescopic pipe (104) having an upper o-ring seal (106) and a lower o-ring seal (107) which supports the weight of decanter, the sleeve pipes (105) coupled with a transfer pipe (203) and a throat pipe (204), wherein limit switches (109) are installed at different levels to control the movement of the telescopic skimming decanter (100) during operation.

Description

A TELESCOPIC SKIMMING DECANTER

TECHNICAL FIELD

The present invention relates to a telescopic skimming decanter, more particularly, a telescopic skimming decanter which requires minimal construction space to carry out the treatment and maintenance process.

BACKGROUND ART

Surface skimming decanter is usually utilized in the sequencing batch reactor system to remove and convert contaminants into a treated effluent that can be safely released back to the environment. It is operated by a means of a timer or proximity switchers during decanting time for the effluent to be discharged from the reaction tank.

Commonly there are two types of sequencing batch reactor systems i.e., hydraulic system and the floating system. However, in hydraulic systems, hydraulic oil leaking causes environmental pollution and involves high maintenance costs. Whereas, in the floating systems the actuator needs regular maintenance to calibrate the valve position and clean the valve position. Also, the pipe and joint may require regular replacement.

There have been several solutions provided for effective telescopic skimming decanter, and a few of them have been discussed below:

US5106494A discloses a decanter and support assembly includes a pair of mooring arms pivotally attaching the decanter to a wall of a wastewater reactor basin and hingedly attached to a float buoyantly supporting the decanter. The decanter includes a valve for controlling the draw of liquid thereinto and a flexible discharge conduit that is fixedly attached to the decanter. A control line for powering the valve is mounted at the top of the non-detachable mooring arm. The float supports an actuation device that is operably connected to the control line. In the first embodiment of the decanter valve, the valve is oriented generally vertically at the inlet of the flexible conduit. In a second embodiment of the decanter valve, an actuator mechanism moves an exterior valve hood with a sealing flange which seals the discharge conduit against liquid. The valve hood sleeves a generally cylindrical intake manifold that supports the decanter. In a third embodiment of the decanter valve, a driving plug is utilized to seal against the discharge conduit. A fourth embodiment of the decanter valve includes a valve hood or plug that is located within an intake manifold.

CN104857770A discloses a vertically adjustable screened decanter system to replace prior art stationary or pivoting effluent weirs in water clarifiers and settling basins. The screened decanter has no physical weir and relies instead on maintaining the desired flow rate by controllably varying the depth of immersion of a screened box. The decanter is periodically raised into a hood that provides spray cleaning and disinfection of the screened box. The system is capable of removing up to 85% of the biochemical oxygen demand in a wastewater stream.

Accordingly, it can be seen in the prior arts that there exists a need to have an improved telescopic skimming decanter.

SUMMARY OF THE INVENTION

An objective of the present invention is to provide a telescopic skimming decanter which requires minimal construction space to carry out the treatment and maintenance process.

It is also an objective of the present invention to provide a telescopic skimming decanter which can be adjusted to variable flow conditions to feed, aerate, settle and decant and also the mechanism to be converted with the use of a hydraulic-driven system. It is further an objective of the present invention to prolonging the service life of the lifting gear system of a telescopic skimming decanter.

Accordingly, these objectives may be achieved by following the teachings of the present invention. The present invention relates to A telescopic skimming decanter comprising an electric motor, a reduction gearbox connected to the electric motor, a pair of screw drive shafts, a water container coupled to the pair of screw drive shafts for upward and downward movement, a telescopic pipe and a sleeve pipe coupled to the telescopic pipe, characterized in that, the telescopic pipe having an upper o-ring seal and a lower o-ring seal which supports the weight of decanter, the sleeve pipes coupled with a transfer pipe and a throat pipe, wherein limit switches are installed at different levels to control the movement of the telescopic skimming decanter during operation.

BRIEF DESCRIPTION OF THE ACCOMPANYING DRAWINGS

So that the manner in which the above-recited features of the present invention can be understood in detail, a more particular description of the invention, briefly summarised above, may have been referred by embodiments, some of which are illustrated in the appended drawings. It is to be noted, however, that the appended drawing illustrate only typical embodiments of this invention and are therefore not to be considered limiting of its scope, for the invention may admit to other equally effective embodiments.

These and other features, benefits, and advantages of the present invention will become apparent by reference to the following text figure, with like reference numbers referring to like structures across the views, wherein:

Figure 1 illustrating a front view of a telescopic skimming decanter (100) in accordance with an embodiment of the present invention. Figure 2 illustrating a side view of the telescopic skimming decanter (100) in accordance with an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

While the present invention is described herein by way of example using embodiments and illustrative drawings, those skilled in the art will recognise that the invention is not limited to the embodiments of drawing or drawings described, and are not intended to represent the scale of the various components. Further, some components that may form a part of the invention may not be illustrated in certain figures, for ease of illustration, and such omissions do not limit the embodiments outlined in any way. It should be understood that the drawings and detailed description thereto are not intended to limit the invention to the particular form disclosed, but on the contrary, the invention is to cover all modifications, equivalents, and alternatives falling within the scope of the present invention as defined by the appended claim. As used throughout this description, the word "may" is used in a permissive sense (i.e. meaning having the potential to), rather than the mandatory sense, (i.e. meaning must).

Further, the words "a" or "an" mean "at least one” and the word “plurality” means “one or more” unless otherwise mentioned. Furthermore, the terminology and phraseology used herein is solely used for descriptive purposes and should not be construed as limiting in scope. Language such as "including," "comprising," "having," "containing," or "involving," and variations thereof, is intended to be broad and encompass the subject matter listed thereafter, equivalents, and additional subject matter not recited, and is not intended to exclude other additives, components, integers or steps. Likewise, the term "comprising" is considered synonymous with the terms "including" or "containing" for applicable legal purposes. Any discussion of documents, acts, materials, devices, articles and the like is included in the specification solely for the purpose of providing a context for the present invention. It is not suggested or represented that any or all of these matters form part of the prior art base or were common general knowledge in the field relevant to the present invention.

In this disclosure, whenever a composition or an element or a group of elements is preceded with the transitional phrase “comprising”, it is understood that we also contemplate the same composition, element or group of elements with transitional phrases “consisting of”, “consisting”, “selected from the group of consisting of, “including”, or “is” preceding the recitation of the composition, element or group of elements and vice versa.

The present invention is described hereinafter by various embodiments with reference to the accompanying drawing, wherein reference numerals used in the accompanying drawing correspond to the like elements throughout the description. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiment set forth herein. Rather, the embodiment is provided so that this disclosure will be thorough and complete and will fully convey the scope of the invention to those skilled in the art. In the following detailed description, numeric values and ranges are provided for various aspects of the implementations described. These values and ranges are to be treated as examples only and are not intended to limit the scope of the claims. In addition, several materials are identified as suitable for various facets of the implementations. These materials are to be treated as exemplary and are not intended to limit the scope of the invention.

With reference to the drawings, the invention will now be described in more detail.

The present invention relates to A telescopic skimming decanter (100) comprising an electric motor (101 ), a reduction gearbox (102) connected to the electric motor (101 ), a pair of screw drive shafts (103), a water container (201 ) coupled to the pair of screw drive shafts (103) for upward and downward movement, a telescopic pipe (104) and a sleeve pipe (105) coupled to the telescopic pipe (104), characterized in that, the telescopic pipe (104) having an upper o-ring seal (106) and a lower o-ring seal (107) which supports the weight of decanter, the sleeve pipes (105) coupled with a transfer pipe (203) and a throat pipe (204), wherein limit switches (109) are installed at different levels to control the movement of the telescopic skimming decanter (100) during operation. The telescopic skimming decanter (100) of the present invention are shown in figure 1 and figure 2.

In accordance with an embodiment of the present invention, the transfer pipe

(203) transfer sludge water from the side compartment to the middle compartment.

In accordance with an embodiment of the present invention, the throat pipe

(204) allows sludge water to flow from the tank to a decant transfer pipe (101 a).

In accordance with an embodiment of the present invention, the decant transfer pipe (101a) transfer sewage water to discharge pipe (108).

In accordance with an embodiment of the present invention, the telescopic skimming decanter (100) is designed to allow effluent discharge from sequencing batch reactor tank during decanting period from top water level to bottom water level and rest at a parking position, which is higher than top water level during aeration and settlement period.

In accordance with an embodiment of the present invention, the telescopic skimming decanter (100) is triggered by a controller to travel from a first level to a lower level and return to an upper level at different speeds driven by the electric motor (101 ) and the reduction gearbox (102).

In accordance with an embodiment of the present invention, the controller is an electrical timer, a proximity switcher, a programmable logic controller or combination thereof. In accordance with an embodiment of the present invention, the telescopic skimming decanter (100) will travel from top water level to bottom water level at a constant low speed and will return to the parking position at high speed.

In accordance with an embodiment of the present invention, the equalization of water flow, the telescopic skimming decanter (100) can be used to the depth of submerges. The telescopic skimming decanter (100) has at least three separate water container (201 ) compartments, each is double weir. Therefore, the water flow will be equalized through at least six weirs which increases the capacity and efficiency. Further, the depth of submerges is preferably 20mm. The telescopic skimming decanter (100) can also be used for upstream process units such as clarifiers where the maximum feed flow is predetermined. The water rise will be matched by the upward movement of the telescopic skimming decanter (100) to limit the outraging flow rate. The discharge flow rate can be controlled by maintaining a constant water head over the telescopic skimming decanter (100) weir.

In accordance with an embodiment of the present invention, the o-ring plastic seals (106, 107) form an air pocket by trapping the air between the o-ring plastic seals (106, 107) to prevent water leakage.

In accordance with an embodiment of the present invention, the weight of the telescopic skimming decanter (100) is partially supported by o-ring plastic seals (106,107) to achieve better sealing performance and improve the resistance of deformation under load. Less weight is also exerted onto the lifting gearbox (102) by the support of the telescopic pipes (104) and discharge pipes (108), therefore prolonging the service life of the lifting gear system.

In accordance with an embodiment of the present invention, a float-switch system is used to monitor the level of the incoming water from the sequencing batch reactor tank and to activate the operation of the telescopic skimming decanter (100) when the high water level is reached.

In accordance with an embodiment of the present invention, the water container (201 ) comprising a broad-crested weir (202).

In accordance with an embodiment of the present invention, the water container (201 ) is made of stainless steel.

In accordance with an embodiment of the present invention, the wall surrounding the water container (201 ) also acts as a scum guard to prevent scum or other suspended solids from being withdrawn during the decanting process.

In accordance with an embodiment of the present invention, the water container (201 ) and said broad-crested weir (202) is coupled with the transfer pipe (203) and the throat pipe (204).

In accordance with an embodiment of the present invention, all anchorage, fasteners, nuts, and bolts submerged in wastewater are made of but not limited to stainless steel. Further, all nuts, bolts, platforms, support which do not merge to wastewater are made of but not limited to galvanized iron.

Various modifications to these embodiments are apparent to those skilled in the art from the description and the accompanying drawings. The principles associated with the various embodiments described herein may be applied to other embodiments. Therefore, the description is not intended to be limited to the embodiments shown along with the accompanying drawings but is to be providing the broadest scope of consistent with the principles and the novel and inventive features disclosed or suggested herein. Accordingly, the invention is anticipated to hold on to all other such alternatives, modifications, and variations that fall within the scope of the present invention and appended claim.

Claims

9 Claims:

1 . A telescopic skimming decanter (100) comprising: an electric motor (101); a reduction gearbox (102) connected to the electric motor (101); a pair of screw drive shafts (103); a water container (201) coupled to the pair of screw drive shafts (103) for upward and downward movement; a telescopic pipe (104); and a sleeve pipe (105) coupled to the telescopic pipe (104); characterized in that; the telescopic pipe (104) having an upper o-ring seal (106) and a lower o-ring seal (107) which supports the weight of decanter; the sleeve pipes (105) coupled with a transfer pipe (203) and a throat pipe (204); wherein limit switches (109) are installed at different levels to control the movement of the telescopic skimming decanter (100) during operation.

2. The telescopic skimming decanter (100) as claimed in claim 1 , wherein said telescopic skimming decanter (100) is triggered by a controller to travel from a first level to a lower level and return to an upper level at different speeds driven by the electric motor (101) and the reduction gearbox (102).

3. The telescopic skimming decanter (100) as claimed in claim 2, wherein said controller is an electrical timer, a programmable logic controller or combination thereof.

4. The telescopic skimming decanter (100) as claimed in claim 1 , wherein said o- ring plastic seals (106, 107) form an air pocket by trapping the air between the o-ring plastic seals (106, 107) to prevent water leakage.

5. The telescopic skimming decanter (100) as claimed in claim 1 , wherein the water container (201) comprises a broad-crested weir (202).

6. The telescopic skimming decanter (100) as claimed in claim 1 , wherein the water container (201) is made of stainless steel.