KR101203878B1 - A system and a method for dewatering of waste - Google Patents

Abstract

The method for premature separation and removal of liquid components from the waste introduced into the waste chute 1 of the vacuum operated waste collection system comprises a first liquid permeable waste support portion at the top of the discharge valve 7 of the waste chute or upstream thereof. 11) and temporarily supporting the waste introduced onto the liquid discharge portion 12; And separating, collecting and removing the liquid component by a vacuum applied to the waste. Early separation and removal of liquid components from waste at the location of the discharge valve ensures correct operation of the vacuum transfer system and greatly reduces the load on the discharge valve.

Description

Wastewater dewatering system and method {A SYSTEM AND A METHOD FOR DEWATERING OF WASTE}

1 is a schematic perspective view showing an embodiment of a waste dewatering system of the present invention applied to a known detachable waste insert chute;

2A is a partial side cross-sectional view showing the flap of the waste discharge valve of the waste insert chute of FIG. 1 with integrated waste dewatering means;

2B is a plan view showing a flap of the waste discharge valve of FIG. 2A;

2C is an enlarged perspective view of the flap of the waste discharge valve of FIGS. 2A and 2B;

3A is a cross-sectional view of the waste dewatering system of FIG. 1 in a first vacuum application step of the waste water dehydration process of the present invention;

3B is a cross-sectional view of the waste dewatering system of FIG. 1 in a second discharge step of the waste dewatering process of the present invention;

3C is a cross-sectional view of the waste dewatering system of FIG. 1 in the third and fourth liquid discharge stages of the waste water dehydration process of the present invention, and

4 is an explanatory diagram showing exemplary steps for carrying out the method according to the present invention for dewatering collected waste.

FIELD OF THE INVENTION The present invention relates to dewatering waste, and more particularly to systems and methods for dewatering household and / or kitchen waste prior to discharging it to a waste suction transport system.

It is known to use vacuum operated systems to collect and transport waste from multiple insertion points to a central collection station. In most cases these systems are used to collect and transport relatively dry household waste packaged in bags. Examples of such general systems are described previously in the applicant's international patent applications WO 02/102686 A1 and WO 00/46130. However, in some geographic conditions and in some applications, it is desirable to use such a system to collect and transport disheveled, ie unpacked, household waste and / or kitchen waste that contains significant liquid components.

In conventional systems, relatively liquid waste is a significant problem and will certainly increase the overall load on the system and its parts and components. In particular, a stronger vacuum is required to properly and efficiently transport such "wet" rubbish in the transport pipes or ducts of the system, thereby increasing its power consumption. Another problem that arises when handling such wet rubbish is that even if the vacuum level is increased, there is no complete risk of failure or blockage of the transport system.

In most systems, a significant amount of waste is collected and temporarily stored directly in the upper portion of the waste discharge valve, in the lower region of the insertion chute of the system. Such a discharge valve is provided at the bottom of the chute to control the discharge of temporarily stored waste into the transfer duct of the system. This temporary storage of rubbish containing significant liquid content will place a very heavy load on the discharge valve. This will undesirably increase the cost of servicing and servicing the system.

The present invention seeks to overcome these problems in an efficient and satisfactory manner.

It is an object of the present invention to provide a solution to the problem of treating waste containing significant liquid components in a vacuum operated waste collection system. In particular, it is an object of the present invention to provide a method for efficiently separating liquid components from waste introduced into such a system to reduce the load on the system and its components.

The above object is achieved by separating and removing the liquid component early from the waste. In particular, the method comprises the steps of: temporarily supporting waste introduced into the liquid permeable waste support and the liquid discharge portion at or above the discharge valve of the waste chute; And separating, collecting and removing liquid components during said temporary support by means of a vacuum applied to the waste. This provides a method for ensuring correct operation of the vacuum conveying system by premature separation and removal of liquid components from the waste at the position of the discharge valve.                         

In one embodiment of the invention, the steps of temporarily supporting the waste and separating and removing the liquid component are all integrated into the discharge valve, thereby making it very easy to control and thus in an efficient manner.

In another embodiment of the invention, the actions of temporarily supporting the waste and separating and removing the liquid component are achieved by the liquid permeable waste support at the top and the concave collection at the bottom, so that they form a rotating flap of the discharge valve. And the dewatered waste is discharged to the waste conveying system by rotating the flap to the open position.

It is a further object of the present invention to provide a waste dewatering system for use in a vacuum operated waste collection system for use in introducing wet waste into such systems without undue load on the system or its components.

This object is achieved by applying an upper liquid permeable waste support and a liquid discharge portion to temporarily support the introduced waste, a collecting portion for collecting the liquid component separated from the introduced waste, a vacuum source connected to the collecting portion and the vacuum It is realized by a waste dewatering system comprising waste dewatering means consisting of a hose of a fluid discharge line for removing separated liquid components.

These and the above objects are realized by the present invention as defined in the appended claims.

The above advantages, and the advantages provided by the present invention, will become apparent upon reading the following detailed description of embodiments of the present invention.

The present invention will now be described with reference to embodiments of the system and method of the present invention shown in the accompanying drawings. The illustrative embodiments shown are examples of the application of the invention to its own free-standing removable garbage insert chute described in the applicant's prior international patent application WO 02/102686. However, the present invention is not limited to these examples.

 Figure 1 shows a detachable insert chute 1 of the type described above and is part of a general kind of vacuum operated waste collection system in which the present invention can be used. In this system, which is described in detail in the aforementioned international patent application WO 02/102686, the separate insert chute 1 is connected to a conveying pipe 2 or a duct. The insertion chute 1 shown in FIG. 1 consists of an upper chute 3 and a lower chute 4 connected to each other via an interface (not shown). The upper chute 3 has a garbage insert 5 and an upper garbage channel 3A, which is connected to the corresponding lower garbage channel 4A of the lower chute 4. The lower chute 4, which is usually located below the ground floor F or below the ground level G of the building, is accommodated in the branch 6 of the conveying pipe 2. For a more detailed description of the embodiment of the insertion chute, see the above mentioned international patent application WO 02/102686.

The lower chute 4 is provided with a chute discharge valve 7. This valve 7 is basically supported conventionally with a flap 8 through a support arm 7A, which is pivotally supported to rotate about an axis PA and is fixed to the lower chute 4. It is a flap type. As shown in Fig. 3A, in the closed position, the flap 8 is sealingly engaged with the valve seat 4B at the lower end of the lower chute 4 and in the open position the conveying pipe 2 in the lower waste channel 4A. Allow free passage of rubbish into the furnace. The movement of the valve flap 8 between the open and closed positions is controlled by the actuation means 10, here a fluid cylinder, via a delivery means not specifically shown.

In contrast to conventional flap type valves, for the purposes of the present invention, the dewatering valve flap 8 comprises waste dewatering means for forming the double wall structure of the flap 8 as described in detail below with reference to FIGS. 2A-2C. (9) is provided. The waste dewatering means 9 is composed of a first liquid permeable waste support 11, a liquid discharge portion 12, and a second collection portion 18 at the bottom. The first liquid permeable waste support 11 and the liquid discharge portion 12 of the dewatering means 9 are porous liquid permeable regions and liquid permeability of the liquid discharge portion 12 of the flap 8 of the chute discharge valve 7. It is formed from the separable liquid permeable fine mesh filter material portion of the rubbish support 11. The lower second collecting portion 18 is a funnel plate formed of a fluid sealing material. The main part of the second collection part is separated from the upper first support part and forms the collection space 20 therebetween. This space 20 is formed for the purpose of collecting the liquid falling through the first liquid permeable waste support 11 and the liquid discharge portion 12 at the top of the waste WW. As shown in the closed position of the second collecting part 18, the upper open edge thereof is fixed to the lower surface of the flap 8 by welding or the like.

The liquid outlet 12 in the porous region is provided directly below the filter portion of the first waste support 11 and is preferably formed integrally with the metal flap 8 of the chute valve 7, and the flap It consists of uniformly distributed holes which are drilled or otherwise formed in the center covering the main part of the surface of (8). These holes are formed with a diameter and / or number sufficient to allow free flow of liquid through. However, the porous liquid discharge portion 12 has its main purpose as a support plate supporting the first waste support 11 by supporting the weight of the wet waste WW (see Fig. 3A) collected on the top of the discharge valve 7. Sufficient strength and stability should be maintained to achieve this. In another embodiment, the central region may be formed by a separate steel porous plate (not shown) which is secured to the central open region of the valve flap 8.

The separable liquid permeable waste support 11 is fixed to the top of the valve flap and is introduced through the bores 15 of the tightening ring 14 and tightened to the corresponding bores 13 of the flap 8. The porous liquid discharge part 12 is completely covered by the tightening ring 14 fastened to the flap 8 by 16). Depending on the application, the filter material of the liquid permeable waste support 11 may be a textile material woven from synthetic or natural fibers, or a wire mesh or the like for the purpose of holding or spreading solid waste and passing the liquid component L of the wet waste WW. Is selected from several materials. When applied for kitchen waste disposal, it is usually appropriate to use the filter material of the liquid permeable waste support 11 having a wire mesh size of about 200 μm.

The second collector 18 has a conical or concave shape with a diameter sufficient to cover all of the holes in the central region of the porous liquid outlet 12 at its upper opening. The second collecting unit 18 serves to collect the liquid that has passed through the first liquid permeable waste support 11 and the liquid discharge unit 12 thereon. At the apex or low point, which are points away from the flap 8, the second collector 18 is provided with an outlet 19. The first end of the outlet line, such as hose 25 or pipe, is connected to outlet 19. Through the hose 25 or pipe of the discharge line and the discharge valve 40 therein, a high vacuum is applied to the waste WW so that the second through the first liquid permeable waste support 11 and the liquid discharge portion 12; The liquid component L of the waste is sucked into the collecting portion 18, and the liquid component L collected by the dewatering means 9 is removed and sent to the upper region of the separation device 26 for separating air from the liquid. This is described in detail below with reference to FIGS. 3A to 3C.

A vacuum application pipe or hose 27, apart from the hose 25 of the discharge line, is similarly connected to the upper region of the separation device 26. The purpose of the separation device is to prevent liquid from entering the vacuum supply system. The second end of the vacuum application pipe or hose 27 is connected to the vacuum supply line 29. High vacuum V, typically V> 80% and preferably about 90% in the present application, is a separation device via vacuum application valve 41 of supply line 29 and vacuum application hose 27 at vacuum source 31. Is applied to (26). In this embodiment, the vacuum source 31 is a vacuum pump and is separate from the means for supplying the vacuum of the waste conveying system.

The first end of the liquid discharge pipe or hose 28 is connected to the lower region of the separation device 26 and the second end is a discharge line leading to a tank 32 or other means for treating the liquid component L of the waste ( 30). The discharge of the liquid component L from the separation device 26 to the discharge line 30 is controlled by the liquid discharge valve 42 provided in the liquid discharge pipe or hose 28. In this embodiment, the vacuum supply line 29 and the liquid discharge line 30 extend along the conveying pipe 2 of the waste conveying system to the central position of the conveying system.

The liquid discharge valves 40, 42 and the vacuum application valve 41 are in each case supplemented by an atmospheric inlet valve 43, which in most cases is connected to the top of the separator 26. The atmospheric inlet valve 43 connects the interior of the separator 26 with the atmosphere to facilitate the discharge of the liquid component L from the apparatus. All the valves 40, 41, 42, 43 are connected to and controlled by a common control unit 44.

The method of the present invention will now be described with reference to the embodiments shown in FIGS. 3A-3C and 4. In this embodiment, the valves 40, 42, the vacuum application valve 41 and the atmospheric inlet valve 43 for discharging the liquid are respectively controlled according to a fixed program. In this embodiment, the dewatering of the wet waste WW is initiated at a predetermined time before each emptying cycle of each chute 1. Prior to the commencement of the first stage I (FIG. 3A) of the dehydration process, all fluid valves 40, 41, 42, 43 and chute discharge valve 7 are in the closed position. The wet waste WW in the chute 1 is supported by the porous region of the liquid discharge portion 12 on the first liquid permeable waste support 11. In the actual test, at the fine mesh size of the filter material of the first liquid permeable garbage support 11 required for kitchen waste, no liquid component passes through the filter material of the first liquid permeable garbage support 11 during this period. Did.

In the first step I of the dehydration process, the vacuum application valve 41 is opened to form a high vacuum therein by discharging air from the separating device 26. Next, in the second stage II (FIG. 3B) of the dehydration process, the liquid discharge valve 40 is fully open so that a high vacuum between about 80 and 90% is rapidly applied to the wet waste WW through the dewatering means 9. . This separates the liquid component L from the waste WW and is drawn into the collection space 20 formed by the second collecting portion 18 of the funnel plate through the liquid permeable waste support 11 and the liquid discharge portion 12. The chute 1 itself will be vented to the atmosphere such that the air will pass through the waste WW at a rate sufficient to allow the liquid component L and air to flow through the dewatering means 9 to the separator 26. Air is separated from the liquid component L in a well known manner and the liquid component L is collected in the lower region of the separation device 26.

In the third stage III (Fig. 3C) of the dehydration process, the vacuum application valve 41 is closed after a predetermined dehydration time. In this case, the atmospheric inlet valve 43 is opened to bring the interior of the separation device into a state where no pressure is applied. In the fourth stage IV (FIG. 3C) of the dehydration process, the liquid discharge valve 40 may be closed, which is not essential to this dehydration process, and the liquid discharge valve 42 is opened to discharge the collected liquid component L. Discharge to line 30 and tank 32. The chute discharge valve 7 is then opened to discharge the now dried waste DW to the transfer pipe 2. Finally, all valves 40, 41, 42, 43 are closed, leaving the system ready for a new dehydration cycle.

In another embodiment of the present invention, the valves 40, 41, 42, 43 and the dehydration process undergo a dehydration cycle according to differently selected variables, such as the detected weight of wet rubbish supported on the discharge valve / dewatering means. It can be controlled according to any program to run. In this way, the load applied to the chute discharge valve by the temporarily supported wet rubbish can be controlled to reduce the wear of the valve. Similarly, the time during which high vacuum is applied to the rubbish can also be controlled in accordance with the detected variables, such as weight reduction of the rubbish supported.

Although the present invention has been described with respect to the most practical and preferred embodiments contemplated at present, the present invention is not limited to these embodiments. Thus, the present invention is not limited to the form in which the waste dewatering means are included in the chute discharge valve, wherein the dewatering means are supported by the valve flap and rotated together with the flap or disposed immediately downstream of the chute discharge valve to independently Rotating embodiments will also be covered. In another variant, the upper part may consist of only one element serving two purposes: to drain the liquid from the waste and to support the weight of the temporarily supported waste. This variant may comprise only one porous plate, wire mesh, grating, or only one fine mesh filter material and is particularly preferred when the smallest solid particles are large in size and the weight of the temporarily supported waste is small. In addition, the system of the embodiment has been described in which a strong vacuum for liquid discharge is provided by a separate vacuum pump. However, the use of standard system vacuums for such liquid discharge purposes is also not excluded. Similarly, the liquid discharged can be collected and / or managed in other ways.

Although the present invention has been described with reference to an example of application for a separate insert chute for household waste that is often disposed outdoors, the present invention is not limited to this application. The basic principle of the present invention is the management and disposal of traditional multi-layered insert chutes, and large kitchen or food waste in commercial and commercial kitchens and restaurants as described, for example, in International Patent Application WO 03/057603. It can be applied to most garbage insert chute of a vacuum operated system, such as a system for doing so.

Accordingly, it is intended that the present invention cover the various modifications and equivalents falling within the spirit and scope of the appended claims.

By separating and removing the liquid components from the waste at the position of the discharge valve of the waste which is introduced into the waste conveying pipe of the vacuum operated waste collection system, it ensures correct operation of the vacuum conveying system and greatly reduces the load on the discharge valve.

Claims (14)

The discharge of the waste introduced into the waste conveying pipe 2 of the vacuum operated waste collection system 2 is controlled by the discharge valve 7 of the waste WW introduced into the waste chute 1 of the vacuum operated waste collection system. In the dehydration method, Temporarily supporting waste introduced into the upper first liquid permeable waste support (11) and the liquid discharge portion (12) upstream of the discharge valve; Separating liquid component L from the liquid permeable waste support and the garbage temporarily supported on the liquid discharge portion upstream of the discharge valve; Applying a vacuum V to the temporarily supported waste through the liquid permeable waste support; Collecting the separated liquid component downstream of the liquid permeable waste support; And Removing the collected liquid component from the waste chute by means of the applied vacuum, wherein the waste water (WW) introduced into the waste chute (1). An upper first liquid permeable waste support (11) and a liquid discharge portion (12) are integrated in the discharge valve (7), and the separated liquid component (L) is disposed in the lower concave second collection portion (18). ), And further comprising the step of incorporating the second collection unit into the discharge valve, wastewater (WW) introduced into the waste chute (1). 3. The rotating flap (8) of the discharge valve (7) according to claim 2, comprising an upper first liquid permeable waste support (11) and a liquid discharge portion (12) and a lower concave second collection portion (18). Forming a fixed dewatering means (9) constituting a) and discharging the dewatered waste DW to the waste conveying pipe (2) of the system by rotating the flap to an open position. The dewatering method of the garbage (WW) introduced into the garbage chute 1 to be. 4. The method of claim 3, further comprising forming a concave second collection portion 18 with a liquid sealing material and connecting a vacuum source 31 to an outlet 19 at a lower point of the concave second collection portion. The dewatering method of the waste (WW) introduced into the garbage chute 1 characterized by the above-mentioned. 5. The method of claim 4, further comprising connecting the vacuum source 31 to the concave second collection 18 via a separation device 26 that separates the liquid component L in the air stream generated by the vacuum V. The dewatering method of the waste (WW) introduced into the garbage chute 1 characterized by including. The dewatering of the waste (WW) introduced into the waste chute (1), characterized in that it further comprises the step of discharging the liquid component (L) separated from the air stream to the separate liquid discharge line (30). Way. Of the waste (WW) introduced into the waste chute (1) of the vacuum operated waste collection system having a waste discharge valve (7) for controlling the discharge of waste introduced into the waste conveying pipe (2) of the vacuum operated waste collection system In the dewatering system, An upper first liquid permeable waste support 11 and a liquid discharge portion 12 provided at the position of the waste discharge valve 7 or upstream thereof to temporarily support the introduced waste; A second collecting portion 18 provided downstream of the upper first liquid permeable waste support for collecting the liquid component L separated from the introduced waste WW; A vacuum source (31) connected to said collection unit to apply a liquid separation vacuum V to the waste (WW) introduced through said first liquid permeable waste support; And A hose 25 of the discharge line connected to said collection unit for applying said liquid separation vacuum, comprising a hose 25 of the discharge line through which said separated liquid component L is removed, The collection part 18 has a concave shape, characterized in that the upper first liquid permeable waste support 11 and the liquid discharge portion 12 and the lower second collection portion are integrated in the waste discharge valve 7. , Dewatering system of waste (WW) introduced into waste chute (1). delete 8. The rotating flap of the double wall of the discharge valve (7) according to claim 7, wherein the upper first liquid permeable waste support (11) and the liquid discharge portion (12) and the lower second collection portion (18). (8), characterized in that the dewatering system of waste (WW) introduced into the waste chute (1). 10. The liquid permeable support plate according to claim 7 or 9, wherein the upper first liquid permeable waste support 11 and the liquid discharge portion 12 are respectively provided with a layer of liquid permeable filter material and immediately below the filter material. The dewatering system of the waste (WW) introduced into the waste chute (1), characterized in that. The dewatering of the waste (WW) introduced into the waste chute (1) according to claim 10, characterized in that the filter material of the upper first liquid permeable waste support (11) is a textile material having a mesh size of 200 μm. system. 10. The lower concave second collecting portion (18) according to claim 9, wherein the lower concave second collecting portion (18) is formed of a liquid sealing material, and one end of the hose (25) of the discharge line is a lower portion of the concave surface of the lower concave second collecting portion. A dewatering system of waste (WW) introduced into the waste chute (1), characterized in that it is connected to the outlet (19) of the point and the other end of the hose (25) of the discharge line is connected to a vacuum source (31). A waste chute (1) according to claim 10, characterized in that a separator (26) is provided for the hose (25) of the discharge line for separating the liquid component (L) discharged from the air stream generated by the vacuum V. Dewatering system of waste (WW) introduced into. delete

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