SE2000049A1 - Dirt water purification device - Google Patents

Abstract

The invention relates to a purification device comprising a purification tank (1) with an inlet (8) for dirty water and an outlet (9) for purified water. The dirty water in the treatment tank (1) is separated into a grease component and a food residue component. The purification device has a food residue tank (5) and a food residue feeder (7a-c) as well as an oil tank (6) and an oil feeder. The food residue feeder (7a-c) for food residue components to the food residue tank (5) and the oil feeder for grease components to the oil tank (6). In one embodiment, the purification tank (1) is tapered upwards and downwards. In this way, fat flowing upwards and food residues sinking downwards are concentrated in the tapered portions. In a further embodiment, the food residue feeder (7a-c) extends partially vertically, where this portion of solid material upwards but allows fluids to flow downwards. In this way, food residues are concentrated and the water content drops.

Description

Dirty water purification device The present invention relates to a purification device for dirty water according to the preamble to the independent requirement.

Background of the invention Dirt water purification devices separate the dirt liquid into three components, one consisting of near clean water, one consisting of almost pure grease and one consisting mainly of food residues. The cleaning device has accumulated a sufficient amount of food residue, it must be emptied of food residue and this is time consuming.

An object of the invention is therefore to provide a purification device for dirty water which does not have to be emptied of food residues as often as purification devices according to the prior art.

These and other objects are achieved by a purification device for dirty water according to the characterizing parts of the independent claim.

Summary of the invention The invention relates to a purification device comprising a purification tank 1 with an inlet 8 of dirty water and an outlet 9 for purified water. The dirty water in the treatment tank 1 is separated into a single-fat component and a food residue component. The cleaning device further comprises a food residue tank 5 and a food residue feeder 7a-c saint an oil tank. 6 and an oil feeder. The food residue feeder 7a-c for food residue components to the food residue tank 5 and the oil feeder for fat components to the oil tank 6.

In an advantageous embodiment, the purification tank 1 from its central pai is tapered upwards and downwards. In this way, fat that fl surfaces upwards and food residues that sink downwards are concentrated in the tapered portions.

In a further advantageous embodiment, at least a portion of the food residue feeder 7a extends partially vertically, this portion of solid material upwards but allowing fl to flow downwards. In this way, the food residues are concentrated and the water content drops. The portion of the feed residue feeder 7a-c may be formed with feed hubs 7b-c.

Brief description of the figures Fig. 1 shows an embodiment of the purification device seen from the side in partial cross-section Figs. 2 shows in greater detail the purification tank in the purification device in cross section seen from the side Figs. 3 shows in greater detail the purification tank in cross section seen from its short end Fig. 4 shows the bottom of the purification tank seen from above Fig. Fig. 6 shows the purification device seen obliquely from above. Fig. 6 shows the purification device seen from the short end of the purification tank. Description of a preferred embodiment The invention relates to a purification device which purifies dirty liquid with varying levels of water, fat and food residues. The purifier divides the dirt liquid into three components, one consisting of near clean water. one consisting of near pure fat and one consisting mainly of food residues. Purification boxes in a purification tank and from this refers to the three components. The food is collected in an oil tank and the food residue is collected in a food residue tank.

The purification process and the processes for collecting and storing fat and food residues are described with reference to the accompanying figures, Fig. 1 shows an embodiment of the purification device seen from the side in partial cross section. The purification tank 1 is connected to the oil tank 6 and the food residue tank 5 with pipelines 4, 7b-c. The transfer of grease to the oil tank 6 through the oil hose 4 takes place with a single pump and is described in more detail in connection with the following figures. The transfer of food residues is shielded by hubs 7b-c in the food residues and is described in more detail in connection with Figure 2. Dirty liquid is supplied to the treatment tank 1 through a dirty water inlet 8 and purified liquid discharges from the treatment tank 1 through a clean water outlet 9.

Fig. 2 shows in greater detail the purification tank 1 in the purification device in cross section seen from the side. the purification tank 1 consists of a side view near the rectangular container. On the upper side of the container there is a dirty water inlet 8 at its right end and on the upper side of the container there is a clean water outlet 9 at its left end.

Dirt water supplied to the treatment tank the dirt water inlet 8 remains for a while due to the size of the treatment tank. The purification tank thus reduces the speed of the effluent so that the fatty membranes upp surface up and the food residues sink. This natural division of the dirty water into three components is the process used to purify it and collect grease and food residues.

The outlet for grease is arranged high on the purification tank, so that the outlet has time to absorb grease as an outlet. The purification tank is equipped with fat level sensors 10 which give a control signal when the level where fat and water are divided is sufficiently low, so that the amount of fat is thus high. The grease pump starts when the grease level has reached the sensor and then runs for a given period of time. At the bottom of the purification tank a feed hub 7a is arranged which extends horizontally. The feed hub rotates slowly all the time so that the food residues are pushed out to the right in the figure through the feed tube 2. 7b.

The horizontal feed hub 7a projects a steady stream of food debris and water, which moves obliquely upwards through the upwardly angled feed hub 7b. While the food residues are efficiently fed upwards in the upwardly angled feed hub, water can flow back into the purification tank. The effect of the upwardly angled feed hubs 7b-c is that the food residues are concentrated and have a lower water content than they would otherwise have.

Fig. 3 shows in greater detail the purification tank in cross section seen from its short end, so the viewer thus has a view where the center axis of the horizontal feed hub 7a points out of the paper plane. Seen from this perspective, it is seen that the purification tank has an elliptical shape. This means that food residues fall down. concentrated to the tapered bottom and fat rising upwards is concentrated to the tapered top of the purification tank.

Fig. 4 shows the bottom of the purification tank seen from above and here it can be seen that the horizontal feed hub 7a extends along the center line of the purification tank, i.e. on the deepest part of the purification tank. the purification tank comprises a number of partitions 12 which prevent the dirty water from flowing directly from the dirty water inlet 8 to the clean water outlet 9 and force it to take a longer path with a slower fate. The slower fate gives time for the dirty water to be divided into three components.

F ig. 5 shows the purification device seen obliquely from above and here it is clearly illustrated how both fat and food residues are forced upwards and then fall into the respective tank. At the outlet of the oil hose 4, where the grease flows into the oil tank 6, there is a grease sensor 14 which detects the presence of grease. Normally the outlet on the oil hose 4 only contains grease when the grease pump is running, but filling the oil tank 6 reacts with the leak sensor 14. This can be used to alert the user with an indicator that the oil tank 6 must be emptied.

At the outlet of the food residue pipe 2 where food residues fall into the food residue tank 5, a motor 16 is arranged which drives the feed hubs 7a-c and a filling sensor 15. If the food residue tank 5 is filled, the reaction filling sensor 15. .

The figure also illustrates a closable opening 13 provided with a lid on the short side of the upper part of the purification tank 1. The user can open the opening and take a sample of the liquid to check the fat content. A corresponding grease opening 13 is also found on the opposite short side of the purification tank 1.

Fig. 6 shows the purification device seen from the elliptical short end of the purification tank 1. The food residue tank 5 is arranged behind the purification tank I and the oil tank 6 is in the figure to the left of the food residue tank 5.

The oil tank 6 is referred to here because the fat is often in the form of oil, but the fat can of course also be a mixture of fl surface and solid fats and contains a lower or higher content of water. fats, fat blends and fat and water blends.

In the preferred embodiment, two upwardly angled feed hubs 7b-c are used, which allow water to flow back towards the firing direction of the hubs. Obviously, other types of discharge devices can be used, which drive food residues upwards but allow water to drain backwards, such as an inclined conveyor belt or the like. Obviously, even eller or less inclined feeders 7b-c than two can be used, regardless of whether they are redesigned for hubs, conveyor belts or in any other way.

In the preferred embodiment, the purification tank has an elliptical shape so that food debris falling downwards is concentrated to the tapered bottom and fat rising upwards is concentrated to the tapered top of the purification tank. Obviously, the purification tank can have another form such as tapered upwards and downwards, as long as the concentration effect is achieved. The purification tank can also have a shape that is not tapered upwards and downwards, but then the concentration effect is lost.

Reference designations 1 Purification tank 2 Feed pipe 4 Oil hose Feed tank 6 Oil tank 7a Feed hub 7b Feed hub 7c Feed hub 8 Dirt water inlet 9 Clean water outlet grease level sensor 1 1 Bleeding opening 12 Partition wall 13 Grease opening 14 Outlet with sensor Outlet with sensor 16