JPH0434951Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a container washing device, and more particularly to a container washing device including a first washing tank and a second washing tank.

[Prior Art] Conventionally, a container washing device includes a first washing tank for washing containers, and a second washing tank disposed downstream of the first washing tank for washing the containers washed in the first washing tank. a washing tank; and a first filtration means for filtering the dirty first washing liquid in the first washing tank, returning the filtered first filtrate to the first washing tank, and discharging the first filter slag to the outside. and a second filtration means for filtering the dirty second washing liquid in the second washing tank, refluxing the filtered second filtrate to the second washing tank, and discharging the second filter slag to the outside. It is known that it is equipped with this type of equipment (Utility Model Publication No. 12571, 1983).

In this type of container washing device, the first washing liquid in the first washing tank into which a particularly dirty container is first introduced is heavily contaminated by the container.
The cleaning liquid in the cleaning tank and the cleaning liquid in the second cleaning tank are separated so that they do not mix. Therefore, separate filtration devices are provided to filter each washing liquid.
The cleaning liquid is circulated separately between each filter means and the cleaning tank.

[Problem to be solved by the invention] By the way, for example, caustic soda solution is used as each of the above-mentioned cleaning solutions, but it is not consumed to decompose the aluminum label of the container, or neutralizes the acid remaining in the container. In addition, when the container is transferred from the first washing tank to the second washing tank, the washing liquid in the first washing tank adheres to the container and is used for dissolving and cleaning other dirt. The first
It is necessary to replenish the washing tank with a large amount of caustic soda solution, which has the disadvantage of increasing running costs.

[Means for Solving the Problems] In view of such circumstances, the present invention provides the above-mentioned container washing device in which the second filter dregs filtered by the second filtration means is transferred to the first washing tank and the first filtration means. It is designed to be supplied to the circulation route between the

[Function] According to such a configuration, the detergent such as caustic soda contained in the second filter dregs can be replenished into the first washing liquid, so that the running cost can be reduced. And at this time,
Although it is not possible to mix the highly contaminated first washing liquid with the second washing liquid in the second washing tank, no problem will occur even if the second filter cake is mixed with the first washing liquid.

[Example] The present invention will be explained below with reference to the illustrated example.
The container washing device includes, from the upstream side to the downstream side, a first washing tank 1 which serves as a preliminary washing tank, a second washing tank 2 which forms a primary washing tank, a second washing tank 3 which forms a secondary washing tank, and a second washing tank 3 which forms a secondary washing tank. It is equipped with a tertiary washing tank 4 and a finishing jet washing tank 5 in sequence, and the containers supplied from the container supply section 6 are transferred to the tanks 1 to 5 by means of a conveying means 7.
The container can be washed by passing through the container 5 sequentially, and can be further carried out to the outside from the container discharge section 8.

The first washing tank 1 constituting the preliminary washing tank includes two washing tanks 11 and a storage tank 12 adjacent to each other from the upstream side to the downstream side.
A first filtration means 14 is connected to the first filtration means 14 for filtering the first washing liquid 13 therein. In the illustrated embodiment, the first filtration means 14 is connected in series with the auxiliary filtration means 1.
5 and a main filtration means 16, so that the first washing liquid 13 in the storage tank 12 can be supplied to the auxiliary filtration means 15 via a pipe 17.

As the sub-filtration means 15, for example, one using a rotating drum screen can be used. The filtrate 19 that has been filtered and flowed into the inside is passed through a pipe 20 and a pump 21.
The liquid is injected from the injection nozzle 22 into the container via the water, and is returned to the storage tank 12.

On the other hand, the first cleaning liquid 13 that has not been filtered by the rotating drum screen 18 is supplied into a mixing tank 26 through a pipe 25, and a second cleaning liquid 13, which will be described in detail later, is supplied into a mixing tank 26 through a pipe 25.
Second filter slag 29 supplied from filter means 27 and 28
mixed with. Then, the mixed liquid 30 is transferred to the pipe 3
1. It is returned to the mixing tank 26 via the pump 32 and stirring pipe 33 to stir the mixed liquid 30, and is also supplied to the main filtration means 16 mentioned above via the pipe 31.

This main filtration means 16 is also equipped with a rotating drum screen 36 like the sub-filtration means 15, and the first filtrate 37 filtered by this rotating drum screen 36 is sent to the washing tank 11 via a pump 38 and a pipe 39. It is being refluxed. The first cleaning liquid 13 returned into the cleaning tank 11 is then transferred to the pipe 4.
0 to the adjacent storage tank 12.

On the other hand, the first filter dregs 41 that have been filtered by the rotating drum screen 36 and adhered to its outer peripheral surface are transported above the liquid level of the mixed liquid 30 as the rotating drum screen 36 rotates. At this time, the first filter cake 41 is pressed against the drum screen 36 by the pressure roller 42, thereby sufficiently removing moisture from the first filter cake 41. The first filter dregs 41 from which water has been removed is peeled off from the rotating drum screen 36 by a scraper 43 and sent to the chute 4.
4 and fall into the collection tank 45 to be collected.

In addition, in order to prevent clogging of the rotating drum screen 36, a portion of the first filtrate 37 is pumped to the pump 3.
8 and a pipe 47, the liquid is sprayed toward the rotating drum screen 36 from a spray nozzle 48 provided inside the rotating drum screen 36.

The second washing tank 2 constituting the primary washing tank has five tanks, and the second washing tank 3 constituting the secondary washing tank has three tanks. The tank is connected to the second filtration means 27 described above,
The three tanks of the second washing tank 3 are separated from the other second filtering means 28.
is connected to.

Each of the second filtration means 27 and 28 also uses a rotating drum screen, and the second washing liquid 51 in the primary washing tank 2 and the secondary washing tank 3 is
The second filtrate 54 filtered by each rotary drum screen 53 is supplied to the outer peripheral portion of the rotating drum screen 53 via a pipe 52, respectively, and the second filtrate 54 is supplied to a pipe 55 and a pump 56, respectively.
The water is refluxed into each of the second washing tanks 2 and 3 through the water.

The second filter slag 29 adhering to the outer peripheral surface of each rotating drum screen 53 is transported above the liquid level of the cleaning liquid as the rotating drum screen 53 rotates, and air from the air nozzle 59 is removed. The liquid is separated by a chute 60 and dropped into the above-mentioned mixing tank 26 which is common to each of the second filter means 27 and 28.

At this time, the first filtrate 37 filtered by the rotating drum screen 36 of the main filtration means spiritual place 6 is directed to each of the chutes 60 through a pipe 61 branched from the pipe 39 and two injection nozzles 62 at its tips. It is designed so that it can be injected. Therefore, the second filter slag 29 blown into the chute 60 by the air from the air nozzle 59 is dropped into the mixing tank 26 by the first filtrate 37 injected from the injection nozzle 62. Become so.

According to the above configuration, the first cleaning liquid 13 in the storage tank 12 is supplied to the sub-filtration means 15 via the pipe 17, and a part of it is filtered by the sub-filtration means 15 and sent to the storage tank 12. It is refluxed. The first cleaning liquid 13 that has not been filtered by the sub-filtration means 15 is supplied to the main filtration means 16 via the mixing tank 26, and the first washing liquid 13 that has not been filtered by the sub-filtration means 15 is
The filtrate 37 is returned to the washing tank 11 and further circulated from the washing tank 11 to the adjacent storage tank 12 via a pipe 40.

The first filter slag 41 attached to the outer peripheral surface of the rotating drum screen 36 of the main filtering means 16 is
After the water is sufficiently removed by being pressed against the drum screen 36 by the pressing roller 42, it is peeled off from the rotating drum screen 36 by the scraper 43 and collected into the collection tank 45.

On the other hand, the second cleaning liquid 5 in the second cleaning tanks 2 and 3
1 are supplied to the second filtration means 27 and 28, respectively, and the second filtrate 54 filtered by the second filtration means 27 and 28 is supplied to the second washing tanks 2 and 2 through the pipes 55 and pumps 56, respectively. It is refluxed within 3 hours. Therefore, each of the second washing tanks 2 and 3
The cleaning liquids 51 do not mix with each other, and the first cleaning liquid 13 does not mix with the second cleaning liquids 51.

The second filter slag 29 filtered by each of the second filter means 27 and 28 is dropped into the mixing tank 26 through the chute 60 and mixed with the first cleaning liquid 13, so that Detergent such as caustic soda contained in the second filter dregs 29 can be replenished into the first cleaning liquid 13. Therefore, it is possible to reduce the amount of detergent newly replenished to the first washing liquid 13 and reduce its running cost, and moreover, the second filter dregs 29 with relatively less dirt can be used as the first washing liquid 13. Since it is mixed with the water, there are no problems caused by dirt.

In the above embodiments, each filtering means uses a rotating drum screen, but the present invention is not limited thereto, and it goes without saying that any filtering means having an appropriate structure can be used. Further, the sub-filtering means 15 in the first filtering means 14 may be omitted if necessary.

[Effect of the invention] As described above, in the present invention, since the second filter dregs filtered by the second filtration means is supplied to the circulation path of the first filtration means, the caustic soda contained in the second filter dregs is It is possible to replenish the first cleaning liquid with detergents such as the following: Therefore, it is possible to reduce the amount of detergent newly replenished into the first cleaning liquid, thereby reducing the running cost.

[Brief explanation of drawings]

The figure is a system diagram showing an embodiment of the present invention. 1...First washing tank, 2, 3...Second washing tank, 1
3...First filtrate, 14...First filtration means, 15
...Subfiltering means, 16...Main filtering means, 26...
Mixing tank, 27, 28... Second filtration means, 29...
Second filter dregs, 30... Mixed liquid, 37... First filtrate, 41... First filter dregs, 45... Collection tank, 51...
...Second washing liquid, 54...Second filtrate.

Claims (1)

[Scope of Claim for Utility Model Registration] A first washing tank for washing containers; a second washing tank disposed downstream of the first washing tank and washing the containers washed in the first washing tank; a first filtration means for filtering the dirty first washing liquid in the first washing tank, refluxing the filtered first filtrate to the first washing tank, and discharging the first filter slag to the outside; 2 Filter the dirty 2nd washing liquid in the washing tank, and
A container washing device comprising a second filtration means for circulating the filtrate into the second washing tank and discharging the second sludge to the outside, wherein the second sludge filtered by the second filtration means is transferred to the second filtration tank. 1. A container washing device characterized in that the water is supplied to a circulation path between a first washing tank and a first filtration means.