JPH0719523Y2 - Horizontal belt filter cake cleaning equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a horizontal belt filter in which a filter chamber frame is disposed on a belt-shaped filter cloth, and the filter is defined by the filter chamber frame. The present invention relates to a device for spraying a cake cleaning liquid on a cake layer in a room.

[Conventional technology]

When performing a filtration operation in a horizontal belt filter, depending on the purpose of filtration, it is desirable to wash the solid content contained in the stock solution to recover as much useful liquid component as possible in the stock solution, or conversely, to collect it. In some cases, it may be desirable to wash away the liquid component attached to the solid component better.

In such a case, it is necessary to sufficiently wash the cake layer in the filter chamber with the washing liquid. Then, when the cake is washed with the purpose as described above, the cleaning liquid can be evenly spread over the entire surface of the cake layer as much as possible, because the cleaning liquid permeates evenly over the entire surface of the cake layer. A good cleaning effect can be expected.

[Problems to be solved by the device]

However, in a conventionally known cake cleaning device for a horizontal belt filter, a device for spraying such a cleaning liquid is a trough or a full cone nozzle (conical full surface injection nozzle) (Japanese Patent Publication No. 62-114616). Japanese Patent Publication 46-
(See Japanese Patent No. 23709) and the like, there are the following problems.

That is, in the case of the conventional device in which the cake cleaning liquid is poured into the filter chamber by arranging the trough fixedly in the upper direction of the filter chamber frame, the trough supplies the cleaning liquid linearly immediately below the trough. However, since the cleaning liquid cannot be directly supplied to the entire surface of the filter chamber, the cleaning liquid cannot be sufficiently diffused to the corners of the rectangular filter chamber.

Therefore, even if a large amount of cleaning liquid is flown into the cake cleaning device using the trough as a supply means of the cleaning liquid, the cake layer around the filter chamber frame at a position distant from the trough is not easily cleaned and is uniform and There was a problem that a perfect cleaning effect could not be obtained.

Further, in the case of the conventional device in which the cleaning liquid for the cake is sprayed in the rectangular filter chamber by disposing the cleaning liquid supply pipe having a plurality of full cone nozzles in the upper direction of the filter chamber frame, Unlike the case, if the number of full-cone nozzles attached to the cleaning liquid supply pipe is extremely increased, the cleaning liquid can be tentatively sprayed on all the cake layers in the filter chamber, including the peripheral portion of the filter chamber frame.

However, in the case of this conventional technique, since the cleaning liquid sprayed in a conical shape from each full cone nozzle is sprayed in a circular shape on the cake layer, the cleaning liquid is spread over the entire surface of the filter chamber having a rectangular plan view. In order to spray and supply, it is necessary to spray the spray areas of the nozzles adjacent to each other so as to partially overlap each other, and if such overlapping spraying is attempted, there will be a portion where the cleaning liquid is not sprayed. Therefore, in any case, the cake cleaning device using such a full-cone nozzle as the supply means for the cleaning liquid has a problem that the cleaning liquid is unevenly sprayed and the uniform cleaning effect cannot be obtained in this case either. It was

In the conventional cake cleaning apparatus as described above, a portion where the cleaning liquid is unevenly distributed (a portion directly below the trough in the case of a trough, and a overlapping portion in the case of a full cone nozzle) is likely to occur. Since excessive cleaning liquid pressure acts on the portion, cracks and peeling easily occur at the portion anyway, and when the cake is washed, if cracks or the like occur once in the cake layer for the above reasons, after that, However, there is a problem that only the filtration resistance of the portion becomes small and the cleaning liquid easily concentrates and flows in the portion, so that the cleaning efficiency as a whole also deteriorates.

The purpose of this invention is to wash the cake in a horizontal belt filter uniformly over the entire surface of the cake layer in the filter chamber, so that the cake can be washed quickly and efficiently. The present invention aims to provide a typical cake cleaning device.

[Means for Solving the Problems]

The technical means taken by the present invention to achieve the above object are as follows: That is, the horizontal belt filter cake washing device according to the present invention has a rectangular plan view on a belt-shaped filter cloth. A cake cleaning device in a filter chamber defined by the filter chamber frame in a horizontal belt filter in which a filter chamber frame is disposed, the cake cleaning device being disposed in an upper direction of the filter chamber. Cleaning liquid supply pipe, a plurality of nozzles attached to the cleaning liquid supply pipe, and nozzle height adjusting means arranged in the cleaning liquid supply pipe for adjusting the height position of these nozzles with respect to the filter cloth. And each of the nozzles is a quadrangular water spray type nozzle, and each of the nozzles divides the filter chamber into a plurality of substantially uniform rectangular sub-sections. For each It is characterized in that it is located in the upper direction of the center and is arranged at the same height.

[Action]

In the horizontal belt filter cake washing device according to the present invention, a means for directly supplying the washing liquid to the entire surface of the cake in the rectangular filter chamber includes a washing liquid supply pipe arranged in the upper direction of the filter chamber frame, Although it is configured with a plurality of nozzles attached to the cleaning liquid supply pipe, since the nozzle is configured with a square-shaped water spraying nozzle in particular,
When the cleaning liquid is supplied to the cake cleaning device of the present invention, the cleaning liquid is sprayed from the nozzles through the cleaning liquid supply pipe into quadrangular pyramid shapes, and the cake in the rectangular filter chamber defined by the rectangular filter chamber frame. Sprinkled on top.

However, these nozzles are arranged at the same height by arranging them in the upper direction of the center of each of the small compartments into which the rectangular filter chamber is divided into a plurality of substantially uniform rectangular compartments. The height position of the nozzle can be adjusted according to the thickness of the cake layer in the filter chamber by the nozzle height adjusting means provided in the cake cleaning device. When the height of the nozzles is adjusted according to the liquid pressure of the cleaning liquid, the cleaning liquid sprayed in the shape of a quadrangular pyramid from each nozzle is spread to the same size as the rectangular small section and is adjacent to each other. It is possible to prevent the sprayed liquids from the nozzles from crossing each other, and to spray the cleaning liquid evenly over the entire surface of the cake layer in the filter chamber without overlapping.

〔Example〕

An embodiment of a horizontal belt filter equipped with a cake cleaning device according to the present invention will be described with reference to FIG. 1. In FIG. 1, 1 is a machine frame, 2 is a filter cloth, and filter cloth 2 is a starting end portion of the machine frame 1. Endlessly on the tension roll 3 mounted on the (back side in the figure), the drive roll 4 mounted on the end portion (front side in the figure), the meandering correction roll 5, and the other guide rolls 6, 7 and 8. It is suspended and the drive roll 4 is connected to a drive source 10 via a chain 9, and the filter cloth 2 is
FIG. 1 is designed to be rotated counterclockwise.

At a suitable position between the tension roll 3 and the drive roll 4 of the filter cloth 2, a filter chamber frame 11 is arranged in the upper direction, and a filter plate 12 is arranged below the filter chamber frame 11.

The filter chamber frame 11 is configured by a rectangular frame body in plan view, and a pair of filter chamber frame support frames 13 and 14 are attached to the upper portion thereof at two positions in the longitudinal direction. There is. Further, the machine frame 1 includes the above-mentioned filter chamber frame supporting frame.
A pair of gate frames 15 and 16 in which beam portions 15a and 16a are arranged above 13 and 14 are erected over the filter cloth 2. The pair of filter chamber frame support frames 13 and 14 and the pair of gate-shaped frames 15 and 16 are connected by a pair of air cylinders 17 and 18 that are a lifting drive means for the filter chamber frame 11.

In the upper direction of the rectangular filter chamber 20 defined by the filter chamber frame 11, the beam portions 15 of the pair of portal frames 15 and 16 are provided.
a. 16a is fixed to the lower edge of the filter cloth 2, and the stock solution supply main pipe 41 is provided along the longitudinal direction of the filter cloth 2, and the stock solution supply main pipe 41 is arranged at four positions at appropriate intervals along the longitudinal direction of the stock solution supply main pipe 41. Connected by 4
Each branch pipe 42, a flow rate control valve 43 inserted into an appropriate position of each branch pipe 42, and a downwardly directed undiluted solution supply port 44 formed by an outlet of each of the branched tubes 42 are provided. mouth
Each of the 44 has a diffuser plate 45 disposed below it.

The cake washing apparatus according to the present invention is arranged in the above-described orientation of the horizontal belt filter having the above-described structure in the upper direction of the filter chamber 20 as follows.

That is, as shown in FIGS. 2 and 3, the filter chamber 20 of this embodiment, which is defined by the filter chamber frame 11 having a rectangular plan view, has a ratio of length to width along the longitudinal direction of the filter cloth 2 in advance. It is set to 3: 1, and the filter chamber frame 11 has front and rear wall surfaces 11a and 11b.
Brackets 22.22, 22.22, each having a long hole 21 in the height direction, are provided upright, and the filter chamber frame 20 has its both end portions in the front and rear respectively. A pair of cleaning supply pipes 23, 23 laid across and supported by the brackets 22.
The filter chamber 20 is arranged in the upper direction of the center position in the width direction of the equally divided section.

The pair of cleaning liquid supply pipes 23, 23 laid over the filter chamber frame 11 as described above are respectively vertically moved at their both ends into the long holes 21 formed in the brackets 22. The mounting height of the U-bolt 25 freely inserted and a pair of nuts 26, 26 screwed to the U-bolt 25 is attached to the bracket 22 so that the mounting height can be adjusted up and down. There is.

Therefore, the pair of cleaning liquid supply pipes 23, 23 can adjust the interval α between the cleaning liquid supply pipe 23 and the surface of the filter cloth 2, that is, the surface of the cake 27 thereon.

Further, one end of each of the pair of cleaning liquid supply pipes 23, 23 is connected to a flexible cleaning liquid supply main pipe 30 via valves 29, 29.

Each of the cleaning liquid supply pipes 23, 23 arranged in the upper direction of the filter chamber 20 as described above is provided with 6
The nozzles 31 of wide-angle quadrangular entire surface spraying type as shown in FIG. And is mounted as shown in FIG.

The wide-angle quadrangular water spray nozzle 31 shown in FIG.
Since the cross-shaped groove 33 centering on the injection hole 32 is formed on the open surface 31a of the nozzle 31, the wide-angle quadrangular surface 34 below the cross-shaped groove 33 is formed as shown in FIG. The liquid can be sprayed almost uniformly.

Further, in FIGS. 1 and 3, 36 is a suction box,
37 is a filtrate drain pipe.

Since the cake cleaning apparatus of this embodiment is configured as described above, the height of the cleaning liquid supply pipes 23, 23 is adjusted so that the interval α between them and the surface of the cake 27 in the filter chamber 20 is adjusted. When properly set, the cleaning liquid can be jetted and supplied from the nozzles 31 toward the twelve square areas that are divided by imaginary lines in FIG. 2 so as to match each area.
That is, the cleaning liquid can be uniformly and evenly supplied to the entire surface of the cake 27 in the filter chamber 20.

[Effect of device]

Since the cake cleaning liquid supply device of the present invention has the above-described structure and, as described in detail regarding the operation, a required number of quadrangles are provided toward the entire surface of the cake in the filter chamber partitioned by the rectangular filter chamber frame. With a nozzle for spraying the entire surface, since the stock solution can be sprayed uniformly, without requiring an excessive cleaning solution, the cake formed in the rectangular filter chamber, over the entire surface, very efficiently, And it can wash uniformly.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a horizontal belt filter equipped with a cake cleaning device according to the present invention, FIG. 2 is a plan view showing only the cleaning device, and FIG. 3 is a vertical side view thereof. (The cross section is taken along the line III-III in FIG. 2), FIG. 4 is a perspective view of the nozzle, and FIG. 5 is an explanatory view of the action of the nozzle. 1 ... machine frame, 2 ... filter cloth, 3 ... tension roll, 4 ... drive roll, 5 ... meandering correction roll, 6/7/8 ... guide roll, 9 ... chain, 10 ... drive source, 11 ... filter chamber frame, 11a ・ 11b
… Wall surface, 12… filter plate, 13 ・ 14… filter chamber frame support frame, 15 ・
16 ... Gate frame, 15a / 15a ... Beam, 17/18 ... Air cylinder, 20 ... Filter chamber, 21 ... Long hole, 22 ... Bracket, 23 ... Cleaning liquid supply pipe, 25 ... U bolt, 26 ... Nut, 27 ... cake,
29 ... Valve, 30 ... Cleaning liquid supply main pipe, 31 ... Nozzle, 31a ...
Opening surface, 32 ... Injection hole, 33 ... Cross-shaped groove, 34 ... Square surface, 41 ... Undiluted solution supply main pipe, 42 ... Branch pipe, 43 ... Flow control valve, 44
... undiluted solution supply port, 45 ... diffusion plate.

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display location B01D 33/58 B05B 1/02

Claims (1)

[Scope of utility model registration request] 1. A horizontal belt filter in which a filter chamber frame having a rectangular plan view is arranged on a belt-shaped filter cloth,
What is claimed is: 1. A cake cleaning device in a filter chamber defined by the filter chamber frame, wherein the cake cleaning device is attached to a cleaning liquid supply pipe arranged in an upper direction of the filter chamber and the cleaning liquid supply pipe. A plurality of nozzles and a height adjusting means of the nozzles arranged in the cleaning liquid supply pipe for adjusting the height position of these nozzles with respect to the filter cloth, each of the above nozzles The nozzles are quadrangular water spraying type nozzles, and these nozzles are located in the upper direction of the center of each of the small compartments into which the filter chamber is divided into a plurality of substantially uniform square compartments. A cake cleaning device for a horizontal belt filter, which is arranged at a height.