CN204543739U - Semi-submerged rotary disc filter - Google Patents

Abstract

The utility model discloses a semi-submerged rotary disc filter, which comprises: a pool body, including a clear water area, a sewage area and a bucket-shaped mud collection area; After sedimentation, it enters the bucket-shaped mud collection area, and the fiber turntable is semi-submerged for filtration; the mud discharge pipe is connected to the bottom of the bucket-shaped mud collection area to discharge pollutants; the driving device is connected to the fiber turntable to drive the fiber turntable to rotate; Among them, the fiber turntable includes: a central tube, connected to the clean water area; a number of filter discs, set on the central tube, the sewage is filtered through the filter discs, and the filtered clean water enters the clean water area through the central tube, and the filtered pollutants are accumulated in the filter. On the plate; the cleaning device is arranged on both sides of each filter plate to remove the pollutants on the filter plate.

Description

Semi-submerged rotary disc filter

technical field

The utility model relates to the field of sewage treatment devices, in particular to a semi-submerged rotary disc filter for advanced treatment of sewage.

Background technique

At present, the effluent of domestic large and medium-sized sewage treatment plants after biochemical treatment and the sewage containing suspended solids after adding drugs to remove phosphorus in the treatment process of reclaimed water need to be filtered. The semi-submerged fiber filter can filter the sewage after adding medicine and micro-flocculation.

However, in the existing turntable filter equipment, sedimentation facilities need to be set up for dosing and dephosphorization, and then filter equipment is used. The cleaning method is mostly suction, which is not thorough and frequent backwashing, which reduces the service life of the filter cloth. Dosing and coagulation After the sewage is filtered, a sedimentation tank needs to be added, which increases the floor space and investment costs.

Utility model content

The utility model provides a semi-submerged rotary disc filter aiming at the above-mentioned shortcomings in the prior art. The utility model is realized through the following technical solutions:

A semi-submerged rotary disc filter, comprising:

Pool body, including clear water area, sewage area and bucket-shaped mud collection area;

The fiber turntable can be rotatably installed on the upper part of the bucket-shaped mud collection area. After the sewage settles in the sewage area, it enters the bucket-shaped mud collection area, and the fiber turntable is semi-submerged for filtration;

The mud discharge pipe is connected to the bottom of the bucket-shaped mud collection area to discharge pollutants;

The driving device is connected to the fiber turntable to drive the fiber turntable to rotate;

Among them, the fiber turntable includes:

Central pipe, connected to the clean water area;

A number of filter discs are set on the central pipe, the sewage is filtered through the filter discs, the filtered clean water enters the clean water area through the central tube, and the filtered pollutants are accumulated on the filter discs;

The cleaning device is arranged on both sides of each filter disc to remove the pollutants on the filter disc.

Preferably, the semi-submerged filter is sewage outside the filter, and filtered clean water inside the filter.

Preferably, the cleaning device includes a self-cleaning nozzle and a back-suction device, the self-cleaning nozzle is arranged above the liquid surface of the sewage to spray filtered water to clean the filter disc, and the back-suction device is arranged below the liquid surface of the sewage, Used to suck back the contaminants on the filter disc.

Preferably, it also includes a high-pressure backwashing jet pump connected with self-cleaning nozzles to provide jetting power.

Preferably, the center pipe includes a collection tank for collecting and discharging the sewage generated by jet cleaning.

Preferably, it also includes a reverse suction pump connected to the reverse suction device to provide reverse suction power.

Preferably, it also includes a pressure sensor, which is arranged in the semi-submerged rotary filter tank, and is used to detect the change of the sewage level in the semi-submerged rotary filter tank. When the sewage level reaches a predetermined value, the driving device operates.

Preferably, it also includes a sealing cover, which is arranged on the top of the semi-submerged rotary disc filter for sealing.

Preferably, a water outlet weir plate is arranged between the central pipe and the clean water area to collect filtered clean water discharged from the central pipe.

Preferably, the sewage area and the clean water area are sealed.

Preferably, the diameter of the filter disc is 2.3m, and the number is 2 to 24, and each filter disc is composed of several fan-shaped blocks.

The utility model can be used for the advanced treatment of conventional process sewage, especially suitable for the sewage treatment of micro-flocculation with chemical addition and dephosphorization. Through the fully enclosed design, it is especially suitable for advanced treatment of sewage treatment plants in cold regions and to avoid air pollution.

Description of drawings

What shown in Fig. 1 is the front perspective view of the utility model;

What Fig. 2 shows is the side perspective view of the utility model;

In the figure, 1-sewage area; 2-clear water area; 3-bucket mud collection area; 4-filter disc; 5-driving device; 6-center pipe; 7-high pressure backwash jet pump; ; 9- collecting tank; 10- outlet weir plate; 11- self-cleaning nozzle; 12- back suction device; 13- mud discharge pipe; 14- sealing cover;

Detailed ways

The following will be combined with the accompanying drawings of the utility model to clearly and completely describe and discuss the technical solutions in the embodiments of the utility model. Obviously, what is described here is only a part of the utility model, not all examples, based on The embodiments of the present utility model and all other embodiments obtained by persons of ordinary skill in the art without making creative efforts all belong to the protection scope of the present utility model.

In order to facilitate the understanding of the embodiments of the present utility model, the following will further explain and illustrate by taking specific embodiments as examples in conjunction with the accompanying drawings, and each embodiment does not constitute a limitation to the embodiments of the present utility model.

As shown in Figure 1 and Figure 2, the semi-submerged rotary disc filter provided by the utility model mainly includes: a sewage area 1, a clear water area 2, a bucket-shaped mud collection area 3, and a sealing cover 14, which can be installed with a movable switch On the top of the bucket-shaped mud collection area 3, the sewage area 1 and the clean water area 2 are also sealed structures, which are suitable for advanced treatment of sewage treatment plants in cold regions and to prevent air pollution.

The end of the bucket-shaped mud collection area 3 near the sewage area 1 is provided with a water inlet, and the bottom is provided with a support. The fiber turntable is installed on the support and can rotate; the fiber turntable is composed of a central tube 6 and several filter discs 4. The number of filter discs 4 There are at least two filter discs 4 installed on the central pipe 6, the fiber turntable is half submerged in the sewage, the part above the liquid level corresponds to the two sides of each filter disc 4, and self-cleaning nozzles 11 are installed, and the part below the liquid level corresponds to each filter disc 4. Back-suction devices 12 are installed on both sides of each filter disc 4 . The bucket-shaped mud collection area 3 also includes a set of back-suction pumps 8 and high-pressure backwash jet pumps 7 , wherein the back-suction pumps 8 are connected to the sludge discharge pipe 13 at the bottom of the tank at the same time. A driving device 5 is installed at the water inlet end outside the sealing cover 14, which can drive the whole fiber turntable to rotate. A collection tank 9 is provided inside the central pipe 6, collecting the backwash water and pollutants from the cleaning process of the cleaning nozzle 11 and discharging them through the discharge pipe.

The diameter of the filter disc 4 is generally 2.3m, and the number is generally 2 to 24. Each filter disc is composed of 24 small sectors. The filter discs 4 are made of anti-corrosion materials, and each filter disc 4 is covered with fiber filter cloth of polyester fiber, and the specifications and types of the fiber filter cloth can be selected according to different water quality.

The utility model adopts external water inlet and internal water outlet, the sewage flows into the bucket-shaped mud collection area 3, and the filter disc 4 is half submerged in the sewage. Simultaneously, in order to make the sewage of each filter disc 4 uniform and to make the water inflow produce low disturbance as far as possible, it is necessary to arrange a water distribution weir in the filter tank. The sewage is filtered through the filter disc 4, and the filtered clean water is collected through the central pipe and discharged to the clean water area 3. Filtration is continuous throughout the operation process. During the cleaning process, only 1% of the filter area is backwashed, and 99% of the filter area is still being filtered.

The working process and working principle of the utility model are: first, the sewage enters the sewage area 1 through the water inlet to settle, and then is filtered through the fiber turntable, and the filtered clean water enters the central pipe 6 and flows out. Suspended solids will gradually accumulate on the surface of the filter disc 4 during the filtration process, resulting in an increase in head loss and a rise in the water level in the bucket-shaped mud collection area 3. The pressure sensor 15 is installed to monitor the change in the liquid level in the bucket-shaped mud collection area 3. When the bucket When the liquid level in the shaped mud collection area 3 reaches the set water level (high water level) for cleaning, the driving device 5 drives the entire fiber turntable to rotate slowly, and at the same time, the back suction pump 8 and the high pressure backwash jet pump 7 are turned on to automatically clean the polluted filter. Fiber filter cloth on disc 4. The backwash water and pollutants generated by spray cleaning are collected into a separate collection tank 9 and discharged through pipelines; the backsuction device 12 below the sewage water surface sucks the pollutants on the filter plate 4, and is discharged into the factory area through the backsuction pump 8 drainage system. During cleaning, the bucket-shaped mud collection area 3 can continuously filter. The bucket-shaped mud collection area 3 below the fiber turntable is conducive to the collection of pollutants at the bottom of the pond. The deposition of pollutants at the bottom of the pool reduces the amount of pollutants on the filter cloth of the filter disc 4, prolongs the filtration time, and reduces the amount of backwash water. The pollutants at the bottom of the bucket-shaped mud collection area 3 are controlled by time, and the mud is discharged within a set time interval, and the pollutants are discharged into the drainage pipe network of the plant through the mud discharge pipe 13 at the bottom.

The utility model is equipped with a high-efficiency cleaning system, which thoroughly cleans the polluted filter disc 4 through the cleaning method of high-pressure jet + back suction. The unique cleaning method can thoroughly clean the filter disc 4, maintain the flux of the filter cloth, and prolong the service life of the filter cloth. It is suitable for the filtration device after micro-flocculation chemical dosing and phosphorus removal. The filtration setting is fast and can withstand high loads. The filtration effect is stable and the equipment occupies a small area. Standard" (GB18918-2002) Class A standard.

The above is only a preferred embodiment of the utility model, but the scope of protection of the utility model is not limited thereto, and any person familiar with the technical field can easily think of All changes or replacements should fall within the protection scope of the present utility model. Therefore, the protection scope of the present utility model should be based on the protection scope of the claims.

Claims (10)

1. A semi-submerged rotary disc filter, characterized in that it comprises: Pool body, including clear water area, sewage area and bucket-shaped mud collection area; The fiber turntable can be rotatably arranged on the upper part of the bucket-shaped mud collection area, and the sewage enters the bucket-shaped mud collection area after being deposited in the sewage area, and is half submerged in the fiber turntable for filtering; A mud discharge pipe, connected to the bottom of the bucket-shaped mud collection area, is used to discharge pollutants; a driving device connected to the fiber turntable to drive the fiber turntable to rotate; Wherein, the fiber turntable comprises: The central pipe communicates with the clear water area; A plurality of filter discs are arranged on the central pipe, the sewage is filtered through the filter discs, the filtered clean water enters the clean water area through the central tube, and the filtered pollutants are accumulated on the filter discs; Cleaning devices are arranged on both sides of each filter disc to remove pollutants on the filter disc. 2. The semi-submerged rotary disc filter according to claim 1, wherein the cleaning device includes a self-cleaning nozzle and a back-suction device, and the self-cleaning nozzle is arranged above the liquid surface of the sewage for spraying Clear water is discharged to clean the filter disc, and the back-suction device is arranged below the liquid surface of the sewage to back-suck the pollutants on the filter disc. 3. The semi-submerged rotary disc filter according to claim 2, further comprising a high-pressure backwash jet pump connected to the self-cleaning nozzle to provide jet power. 4. The semi-submerged rotary disc filter according to claim 3, characterized in that, the central pipe includes a collection tank for collecting and discharging the sewage produced by jet cleaning. 5. The semi-submerged rotary disc filter according to claim 2, further comprising a reverse suction pump connected to the reverse suction device to provide reverse suction power. 6. The semi-submerged rotary disc filter according to claim 1, further comprising a pressure sensor arranged in the semi-submerged rotary disc filter to detect pressure in the semi-submerged rotary disc filter. The sewage liquid level changes, and the driving device operates when the sewage liquid level reaches a predetermined value. 7. The semi-submerged rotary disc filter according to claim 1, further comprising a sealing cover arranged on the top of the semi-submerged rotary disc filter for sealing. 8. The semi-submerged rotary disc filter according to claim 1, wherein a weir plate is provided between the central pipe and the clean water area to collect the filtered clean water discharged from the central pipe . 9. The semi-submerged rotary disc filter according to claim 1, wherein the sewage area and the clean water area are sealed. 10. The semi-submerged rotary disc filter according to claim 1, characterized in that, the diameter of the filter disc is 2.3m, and the number is 2 to 24, and each filter disc is composed of several fan-shaped blocks.