CN208003558U - Rotary drum filter - Google Patents

Abstract

The utility model discloses a rotary drum filter in the field of filter devices, which comprises a box body, a rotary drum, a partition plate and a slag drop plate, one side of the box body is provided with a water inlet, and the other side is provided with a slag discharge port and a slag drop plate. The slag plate and the bottom are provided with a water outlet. One end of the slag plate is close to the drum, and the other end protrudes from the slag outlet. The inside of the box is divided into an upper chamber and a lower chamber by the drum and a partition. The return cavity has an overflow port at the bottom of the return cavity, and the height of the upper edge of the return cavity is less than or equal to the height of the highest point of the drum. In the rotary drum filter of the present invention, by adding a backflow chamber in the upper chamber, when the water intake is too large, the water will enter the backflow chamber and flow out through the overflow port, thereby reducing the filter load of the drum and ensuring the normal operation of the equipment .

Description

drum filter

technical field

The utility model relates to a filter device, in particular to a rotary drum filter.

Background technique

Drum filter is a kind of equipment that can continuously and effectively screen suspended solids in water, and is widely used in sewage pretreatment or industrial screening process.

The structure of the drum filter in the prior art is shown in Figure 1, including a box body 1, a water inlet is provided on one side of the box body 1, a slag outlet is provided on the other side, and a water outlet is provided at the bottom. There is a drum 2, a partition 3, and a slag removal plate 4, and the inner part of the box is divided into an upper chamber 5 and a lower chamber 6 through the drum 2 and the partition 3, and the sewage (or other raw water) enters the upper chamber from the water inlet The chamber 5 seeps into the lower chamber 6 through the filter screen of the drum 2, and the scum in the water is trapped on the surface of the filter screen of the drum 2, and is scooped and collected by the slag removal plate 4 as the drum 2 rotates and discharged from the slag outlet , the filtered water flows out from the water outlet below the lower chamber 6 .

In actual use, due to improper operation or unstable water intake, the flow of water intake is too large, the sewage will not have time to leak from the filter screen of the drum 2, and the water level will rise. When it is higher than the height of the highest point of the drum 2, the sewage will It will go over the drum 2 and directly flow out of the box 1 from the slag plate 4, which will affect the normal operation of the equipment, cause incomplete filtration and separation, and affect the environment.

Utility model content

The purpose of the utility model is to provide a drum filter to achieve the purpose of complete filtration and separation.

The purpose of this utility model is achieved as follows: a drum filter, including a box, a drum, a partition and a slag plate, one side of the box is provided with a water inlet, and the other side is provided with a slag outlet and a slag drop. The slag plate and the bottom are provided with a water outlet. One end of the slag plate is close to the drum, and the other end protrudes from the slag outlet. The inside of the box is divided into an upper chamber and a lower chamber by the drum and a partition. The backflow chamber has an overflow port at the bottom of the backflow chamber, and the height of the upper edge of the backflow chamber is less than or equal to the height of the highest point of the drum.

The drum filter of the utility model is applied to sewage treatment. Compared with the prior art, its beneficial effect is that when the water intake is too large, the water will enter the backflow cavity and flow out through the overflow port, thereby reducing the filter load of the drum. , to ensure the normal operation of the equipment.

As a further improvement of the utility model, an overflow plate is provided on the side close to the water inlet in the upper chamber, and the bottom of the overflow plate connects with the box body, and the overflow plate and the box body connected to it form a return cavity. Compared with the way of locally forming the return cavity by improving the structure of the box itself, the method of forming the return cavity by setting the overflow plate is low in cost, and is suitable for modifying the existing drum filter.

As a further improvement of the utility model, the height of the overflow plate can be adjusted. Due to the different filter gaps of different drums and the different water passing per unit area, the required return heights under different conditions are different. By adjusting the height of the overflow plate, the height of the upper edge of the return chamber can be adjusted, which can Meet the needs of different situations.

As a further improvement of the utility model, the overflow plate includes a fixed plate and a movable plate, the movable plate is longitudinally provided with a chute, and the fastener passes through the chute to connect the fixed plate and the movable plate. In this way, by loosening the fastener, the position of the movable plate can be conveniently adjusted up and down to achieve the required height of the upper edge of the return cavity under different conditions.

As a further improvement of the utility model, a horizontal scraper is provided at the end of the partition near the drum, and the gap between the scraper and the drum can be adjusted. In this way, by adjusting the gap between the scraper and the drum, it is possible to prevent sewage (or other raw water) from flowing directly into the lower chamber from the gap to the greatest extent.

Description of drawings

Fig. 1 is a schematic diagram of the structure of a drum filter in the prior art.

Fig. 2 is a schematic diagram of the structure of the drum filter of the present invention.

FIG. 3 is a partial enlarged view of K in FIG. 2 .

Among them, 1 box, 2 drum, 3 partition, 4 slag plate, 5 upper chamber, 6 lower chamber, 7 overflow port, 8 overflow plate, 8A fixed plate, 8B movable plate, 8C return chamber Top edge height, 9 chutes, 10 scrapers.

Detailed ways

The drum filter shown in Figure 2 includes a box body 1, a drum 2, a partition plate 3, and a slag removal plate 4. One side of the box body 1 is provided with a water inlet, and the other side is provided with a slag outlet and a slag removal port. The plate 4 and the bottom are provided with a water outlet, and one end of the slag dropping plate 4 is close to the drum, and the other end protrudes from the slag outlet. The inside of the box body 1 is divided into an upper chamber 5 and a lower chamber 6 by a drum and a partition. The upper chamber 5 is provided with a return cavity, and the bottom of the return cavity is provided with an overflow port 7 .

Specifically, in this embodiment, an overflow plate 8 is provided on the side near the water inlet in the upper chamber 5, and the bottom of the overflow plate 8 is connected to the box body 1, so that the overflow plate 8 and the box body 1 connected to it Together they form the return cavity. When the amount of water inflow is too large during the sewage treatment process, the water level in the upper chamber 5 is higher than the height of the upper edge of the return chamber by 8C, and the sewage (or other raw water) will enter the return chamber and flow out through the overflow port 7, and return to the original water pool. Thereby reducing the filtering load of the drum 2 and ensuring the normal operation of the equipment.

In order to prevent the sewage (or other raw water) from passing over the drum 2 and directly flowing out of the box 1 from the slag plate 4, the height 8C of the upper edge of the return chamber should be at least equal to the height of the highest point of the drum, but considering the different filter clearances of different drums, The water flow per unit area is different. The height 8C of the upper edge of the return cavity is equal to the height of the highest point of the drum. It may not achieve the desired effect in all cases. In order to facilitate the actual use, adjust the height 8C of the upper edge of the return cavity according to the specific situation. , the overflow plate 8 can be divided into a fixed plate 8A and a movable plate 8B (as shown in Figure 3), the movable plate 8B is provided with a chute 9 longitudinally, and the fastener passes through the chute 9 to connect the fixed plate 8A and the movable plate 8B together. In this way, the position of the movable plate 8B can be conveniently adjusted up and down by removing the fasteners, so as to achieve the required height of the upper edge of the recirculation cavity under different conditions.

As shown in FIG. 2 , a horizontal scraper 10 is provided at the end of the partition 3 near the drum 2 , and the gap between the scraper 10 and the drum 2 can also be adjusted. The specific implementation is similar to the implementation of the adjustable height of the overflow plate, so it will not be repeated here.

The utility model is not limited to the above-mentioned embodiments. On the basis of the technical solutions disclosed in the utility model, those skilled in the art can make some technical features based on the disclosed technical content without creative work. Replacement and deformation, these replacements and deformations are all within the protection scope of the present utility model.

Claims (5)

1. A rotary drum filter, comprising a casing, a drum, a dividing plate and a slag removal plate, one side of the casing is provided with a water inlet, the other side is provided with a slag outlet and a slag removal plate, and the bottom is provided with a One end of the slag discharge plate is close to the drum, and the other end protrudes from the slag outlet, and the inside of the box is divided into an upper chamber and a lower chamber by the drum and the partition , characterized in that: the upper chamber is provided with a return cavity, the bottom of the return cavity is provided with an overflow port, and the height of the upper edge of the return cavity is less than or equal to the height of the highest point of the drum. 2. The drum filter according to claim 1, characterized in that: an overflow plate is provided on the side of the upper chamber close to the water inlet, and the bottom of the overflow plate is in contact with the box body. Then, the overflow plate and the box body connected to it form the return cavity. 3. The drum filter according to claim 2, characterized in that: the height of the overflow plate is adjustable. 4. The drum filter according to claim 3, characterized in that: the overflow plate includes a fixed plate and a movable plate, and the movable plate is longitudinally provided with a chute, and the fastener passes through the chute to The fixed plate and the movable plate are connected together. 5. The drum filter according to any one of claims 1-4, characterized in that: one end of the partition near the drum is provided with a horizontal scraper, and the scraper is connected to the drum The gap between them is adjustable.