WO2003018919A1

WO2003018919A1 - Particle separator and seal for liquid

Info

Publication number: WO2003018919A1
Application number: PCT/SE2002/001493
Authority: WO
Inventors: Tord Sture Donald NÄÄSLUND
Original assignee: Naeaeslund Tord Sture Donald
Priority date: 2001-08-30
Filing date: 2002-08-26
Publication date: 2003-03-06
Also published as: SE524313C2; SE0102880D0; SE0102880L

Abstract

The invention concerns a separator for separation of solid particles and other pollutants from liquid or gases, comprising a scrap trap with seal for liquid, and which separator can be connected to the inside of conduits. The separator is preferably used as a sanitary water seal and draining-well for water and wastewater. The separator is characterized by that its wall (5), when the separator is connecteed with a conduit (13), forms a trap and a water seal (12) for collection of solid particles and other pollutants from flowing liquid. Elastic gaskets (3) surrounds the seating (1) of the arrangement, whic centre has an opening (2) for liquid run off. Furthermore, the wall of the separator has openings (7) for flowing of liquid through the centre part of the arrangement. The uppermost part of the separator is covered by a spreader (8), which preferably has a centre part that is higher than its outer edge, and is terminated with a downwaardly bent and essentially vertical shielding (9). The separator has a fixing device (14), that preferably can be connected to an external screening (15). The lower part and opening of the separator is constructional prepared for connection an automatic shut-off device (16), which inner space has a spherical device (17) that is freely movable vertically.

Description

PARTICLE SEPARATOR AND SEAL FOR LIQUID.

The present invention concerns an arrangement for separation of solid particles and other pollutants from liquid or gases, comprising a scrap trap with seal for liquid and which arrangement can be connected to the mside of conduits. The arrangement is preferably used as a sanitary water seal and draining gutter for water and wastewater.

Known technique

The market shows many examples of drainmg-wells and water seals. For example in the patent publication 506 407 a drammg-well is described that comprises an outer part with an mlet and outlet equipped with a stop valve and an odour trap. A similar draining-well is described in the patent publication 404 389. This drammg-well lacks an odour trap that prevents odour to be emitted from the drammg-well

For the purpose of preventing wastewater to press back through the water seal or in water closets, they are generally provided with different types of stop valves and/or non-return valves Examples of such are shown in e.g. the German patent 1089 and in the British patent 975.180. Characterising for some of these are that they consist of a rubber bubble or spherical device that, if required, shuts off the flow of water if a wrong way flow happens to arise.

An essential drawback with known arrangements is that they are complicated and therefore relatively expensive to manufacture. Furthermore, it is often rather complicated to both mount and demount known water seals and draining gutters to other sanitary equipment.

Known arrangements have a limited field of application, whereas they only can be used specifically either as draming-gutter or as water seal. Nor are they suitable for separation of particles from gases.

Description of the invention

Figure 1 shows a drawing in section of the arrangement according to the invention, and

Figure 2 shows the arrangement connected to a pipe for gases or for liquid.

Figure 3 shows the arrangement completed with an automatic shut-off device.

The arrangement has a seating 1 , that in its central part has an opening 2 which size (generally its diameter) can vary within relatively large range. Yet, the opening shall be smaller than the diameter of the underlying sphere (non-retum valve), that will be described later on. The seating that generally has circular shape seen from above or below is surrounded by at least one gasket ring 3, that can be a so-called o-πng. The seating can be manufactured from steal or plastics. In principal, the seating can have any dimension. Therefore, the separator can be used for all conduits that are used today and henceforth will be used in different connections

A construction 5 is connected on the upper and central part 4 of the seating, that constitutes a partial scrap/particle trap and as a partial water seal. The construction, subsequently called separator, has a diameter or an outer measure that is smaller than the outer measure of the seating The smallest measure of the separator with respect of the diameter or the width is synonymous with the measures of the central opening of the seating.

Concerning the height of the seating, it can vary within a fairly wide interval. However, its height should not be as high so that it can be difficult to press the arrangement in to a conduit Nor can the height be so small that there will be a problem with keeping the arrangement m a horizontal position and in a fixed position For lead-through of liquid or gases through the separator, its wall 6 (envelope surface) is provided with openings 7. The openings can have different shapes and different sizes Consequently, they can be circular, oblong (apertures) oval and so on In some cases it can be desirable to achieve a fractionation effect, i.e. only separating particles with a certain size. Therefore, the entire wall of the separator can consist of a large amount of holes and thereby get the shaping and function of a strain device.

The uppermost part of the separator is covered by a spreader 8, that preferably has a centre part higher than its outer edge As seen from the sectional view m figure 1, the separator has a convex shape. Furthermore, as seen from the Figure the outer edge of the separator is terminated with a downwardly bent and essentially vertical shielding 9. This shielding has an ending 10 in vertical direction, which is lower than the openings 7 ofthe separator. The shielding forces the water or the gas to form an alternate path in both downward and upward directions. This flow is illustrated in Figure 2 by arrows 11.

Both the spreader and the shielding can have different surface structures. Accordingly, the surface structure can be helical, which makes the water take a more tangential and more rotating direction than radial direction.

Characterizing for the arrangement according to the invention is that the wall 6 of the separator while connecting it with a conduit forms a scrap trap and water seal 12 with the wall 13 of the conduit. This condition is demonstrated by Figure 2. As seen by the Figure, the arrangement can vertically be placed at optional level (alternatively depth) in the conduit. When using of the arrangement as draining gutter, the level is determined by among other things the thickness of the beam structure, which generally varies between 120 mm and 200 mm. Naturally, the arrangement can be used in coarser pipes.

The diameter of the arrangement should only be marginally smaller than the diameter of the conduit.

Depending on the gasket rings and their elasticity, a sealing connection is achieved between the arrangement according to the invention and the wall of the conduit.

To fix the position of the arrangement it is advantageous to provide the spreader with a fixing device 14, that can be affixed to the overhead screen 15 or the like. Moreover, this fixing device facilities the work to empty the trap from particles and other pollutants.

The separator is provided with threads or a snap-m engagement for connection of an automatic shut-off device 16. Shown in figure 3, the lower part of the arrangement is completed with such shut-off device that can be regarded as a non-return valve. A spherical device 17 , subsequently called sphere, can move freely in vertical direction and performs as a valve. At flowing of for example wastewater and farther out through the sewage system, the sphere is in its normal position. Consequently, the sphere is resting in the bottom 18 of the shut-off device. To allow down-going flow of liquid (or gas) the bottom has a number of openings. In a preferred embodiment, the sphere rests on cones or projections 19, Figure 3.

If the flow direction of some reason is reversed and it is undesired, the sphere leaves its normal position and is lifted upwards due to the pressure from the liquid or the gas. The sphere is pressed towards the opening 2 of the seating. The sphere used in liquid carrying pipes is of course heavier, than the sphere used in a gas-carrying pipe. Embodiment 1

By virtue of Figure 1-3 some examples of use of the invention will be shown.

When renovating an apartment and in connection with the exchange of stack pipes the invention was tested both as water seal and draming-well.

The sewer from the washbasin had a diameter of 75 mm, while the sewer from the shower had a diameter of 150 mm.

The separator applied in the pipe from the washbasin is subsequently indicated as water seal, while the application in the sewer from the shower is indicated as drammg-well. The water seal was introduced down the pipe (13) to a depth of 120 mm Given measure concerns the lower edge ofthe seating counted from the screening ofthe wash basin.

Surprisingly, it turned out to be easy to introduce the water seal to the intended position. The water seal was fixed in the intended position by connection of the fixing device (14) to the screening (15).

The water seal was left in the conduit for three weeks. Since the tradesmen in connection with the renovation of the apartment often used the washbasin, the test was rather comprehensive despite a relatively short test period

Regarding the draining- well for the shower water, the upper part of the spreader was positioned about 20 mm below the screening Since the shower also was used daily by the tradesmen, a fairly thorough and representative test was obtained that also lasted for three weeks.

After a test period of three weeks, the respective arrangement was lifted out from the conduits. It could immediately be verified that both the drainmg-well and the water seal were still in the exact position as by mounting. Even more surprising was, that it was very easy to lift up both the draining-well and the water seal. This holds especially for the drammg-well considering the relatively large envelope surface (circumference). Furthermore, customers should be notified that the gasket rings 3 were still in their milled grooves and were totally intact.

When inspecting the traps ofthe water seal and the drammg-well, particles where recovered that had passed the screening. As expected, the accumulation of particles consisted mostly of grains of sand.

By use of the present invention, a number of advantages are obtained. Especially advantageous is the fact that it is easy both to apply and demount the arrangement in existing or new conduits. Despite that the arrangement has a simple shaping, a particularly good effectiveness is obtained. Depending on its relatively simple design, it is relatively cheap to manufacture.

A further advantage with the invention is of course that the arrangement can be used for different applications. Thus, it can in principle be put in any conduit and be used for different purposes, as for example water seal, draming-well or for specific separation.

For example, the separator can be connected to a vortex cleaner that is used in pulp and paper industry. The vortex cleaner constitutes the last step in the reject screen room in a pulp factory. When passing through the vortex cleaner, the pulp fibres (accept) are separated from pollutants (reject), such as bark and sand. Normally, the reject goes to a thickener before combustion. The reject normally contains at least 90 % by weight of wood fibre reminders, while the rest is bark particles, gravel and sand. The content of inorganic material results in a fairly high contents of ashes after the combustion. With respect to the content of ashes, it is desirable to remove non- combustible material. Another reason is that sand and gravel wear pipes, wire gauze and machines. Even more interesting is the possibility to screen a wood material that can be brought back as fibre material in the pulp factory. Preferably, the separator can be connected to the reject outlet of the vortex cleaner Due to the separators capacity to trap solid particles, the content of ashes (sand and filler) in the knotter pulp can be reduced.

Claims

1. Separator for separation of solid particles and other pollutants from liquid comprising a scrap trap with water seal and which arrangement is connected to the side of conduits, characterized in that the wall (5) of the separator while connecting it to a conduit 13, forms a trap and a water seal (12) for collection of solid particles and other pollutants from flowing liquid.

2. Separator according to claim 1 characterized in that the separator has elastic gaskets (3), which surrounds the seating (1) of the separator and which centre has an opening (2) for liquid run off.

3 Separator according to claim 1 and 2 characterized in that a construction is connected on the upper and central part (4) of the seating, and the wall of the construction has a diameter or an outer measure that is smaller than the outer measure of the seating.

4. Separator according to claim 1 -3 characterized in that the wall of the separator has openings (7) for flowing of liquid through the central part of the arrangement.

5 Separator according to claim 1-4 characterized in that the uppermost part ofthe separator is covered by spreader (8), that preferably has a centre part which is higher than its outer edge, and which is terminated with a downwardly bent and essentially vertical shielding (9).

6. Separator according to claim 1-5 characterized in that the spreader of the separator has a fixing device (14), that preferably can be connected to an external screening (15).

7. Separator according to any of the claims 1 -6 characterized in that the lower part and opening of the separator is constructional prepared for connection with an automatic shut-off device (16), which inner space has a spherical device (17) that is freely movable vertically.