CN218146278U - Denitrification deep bed filter - Google Patents

Abstract

The utility model discloses a denitrification deep-bed filter tank, which comprises a impurity removal tank and a filter tank: the impurity removal tank is provided with a water inlet pipe, the filter tank is provided with a water outlet pipe, and the outlet end of the water outlet pipe is provided with clear water pool, between the impurity removal pool and the filter pool, there is a sedimentation tank that drives the water flow from bottom to top and then from top to bottom, and the filter pool is provided with a water distribution layer, a supporting layer, The lower packing layer and the upper packing layer, the clear water pool is provided with water recoil components for independently supplying water to the lower packing layer and the upper packing layer. In the utility model, the filter tank can carry out independent and layered water supply operation for the two packing layers through the water recoil assembly provided, so that the impurity particles remaining after filtering on the two packing layers can be completely cleaned and reflected. Flushing down, avoiding the recoil water supply of a single layer in contact with the thicker packing layer, resulting in a sharp drop in recoil water pressure, which cannot perform efficient recoil, and improves the effect of water recoil.

Description

A deep bed filter for denitrification

technical field

The utility model relates to the technical field of sewage treatment, in particular to a denitrification deep bed filter.

Background technique

Denitrification deep bed filters are usually used for the removal of suspended solids in water treatment, single-layer homogeneous filter material or multi-layer filter material filter, the filter bed is relatively deeper than the traditional fast filter, mostly downflow gravity filter, The filter material is natural quartz sand, and the multi-layer filter material is anthracite, quartz sand and garnet. The particle size of each filter material is arranged in the order of small L and large, and the hydraulic load and nitrate volume load are properly designed. The deep bed filter can also have the function of denitrification and denitrification, and remove suspended solids and nitrate simultaneously. The structure of the bed filter allows suspended solids in the water to penetrate deeper into the filter bed, which can improve the interception capacity of the filter. The filtration process includes filtration and backwashing.

Chinese Patent Announcement No.: CN212127693U discloses "A Deep Bed Filter for Denitrification", including a treatment tank, the inner bottom of the treatment tank is provided with an air-distributing water pipe, and both ends of the air-distributing water pipe run through both sides of the treatment tank. side, the top of the air distribution pipe is provided with a filter brick layer, the top of the filter brick layer is provided with a support layer, the top of the support layer is provided with a filter material layer, and the top side of the treatment pool is provided with a connection , one side of the connecting frame is provided with a backwash outlet channel, both ends of the air distribution water pipe are provided with an inlet pipe, and a second fixing ring is arranged outside one end of the inlet pipe, and the two ends of the air distribution water pipe are Both are provided with a first fixed ring, a first gasket is provided between the air distribution pipe and the inlet pipe, a sealing ring is provided on one side of the first fixed ring, and a sealing ring is provided on one side of the second fixed ring. A first sealing sleeve is arranged inside the sealing groove, the sealing ring is located inside the first sealing sleeve, an installation cylinder is arranged outside the connection between the inlet pipe and the air distribution and water pipe, the first fixing ring and the second The two fixing rings are both located inside the installation cylinder, and a grip bar is arranged on the outside of the installation cylinder, and one end of the grip rod is located inside the installation cylinder.

In order to improve the filtration effect of denitrification deep bed filter, the thickness of the packing layer is generally thicker. When the backwash water structure backwashes the packing layer, the backwash water flow will cause the water pressure to drop after contacting the thicker packing layer, making The recoil force of the recoil water flow on the packing layer is small, thereby reducing the recoil effect.

Utility model content

The purpose of the utility model is to provide a denitrification deep-bed filter which can independently supply water for backwashing of layers of thick packing layers, reduce water pressure loss and improve backwashing effect.

In order to achieve the above purpose, the utility model provides the following technical solutions: a denitrification deep bed filter, including a removal pool and a filter pool:

The impurity removal pool is provided with a water inlet pipe, the filter pool is provided with a water outlet pipe, and the outlet end of the water outlet pipe is provided with a clear water pool;

A settling tank is set between the impurity removal tank and the filter tank to drive the water flow from bottom to top and then from top to bottom;

The filter tank is provided with a water distribution layer, a supporting layer, a lower packing layer and an upper packing layer in sequence from bottom to top;

The clear water pool is provided with a water recoil assembly for independently supplying water to the lower packing layer and the upper packing layer.

As a further description of the above technical solution:

The water recoil assembly includes a water pump arranged in the clear water tank, the water outlet of the water pump is provided with a recoil water pipe extending into the filter tank, and the recoil water pipe is provided with short flushing pipes extending to the bottom of the lower packing layer and the upper packing layer at intervals. head and long punch.

As a further description of the above technical solution:

Also includes gas recoil assembly;

The air recoil assembly includes a blower, the air outlet of the blower is provided with a recoil air pipe extending into the filter tank, and the recoil air pipe is provided with short and long air nozzles extending to the bottom of the lower packing layer and the upper packing layer at intervals .

As a further description of the above technical solution:

The inner wall of the impurity removal tank is provided with a V-shaped filter holder, and the bottom of the filter holder is connected to the sewage collection tank through a sewage discharge pipe, and a shut-off valve is arranged on the sewage discharge pipe.

As a further description of the above technical solution:

The inner wall of the sedimentation tank is provided with a middle baffle, and the inner walls of the sedimentation tank and the middle baffle are dislocated with conical guide blocks.

As a further description of the above technical solution:

A sludge tank is arranged at the bottom of the sedimentation tank, and a sludge pump is arranged in the sludge tank, and the sludge pump is connected with the sewage collection tank through a sludge pipe.

As a further description of the above technical solution:

A backwash water pipe is arranged on the filter tank, and a filter cover is arranged at the inlet end of the backwash water pipe.

In the above technical solution, a denitrification deep bed filter provided by the utility model has the following beneficial effects:

Through the water recoil component, the filter can carry out independent and layered water supply operation to the two packing layers, so that the impurity particles remaining after filtering on the two packing layers can be completely cleaned and recoiled, avoiding single The recoil water supply at the level is in contact with the thicker packing layer, and the recoil water pressure drops sharply, making it impossible to perform efficient recoil, thus greatly improving the effect of water recoil.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the accompanying drawings required in the embodiments will be briefly introduced below. For some embodiments described, those skilled in the art can also obtain other drawings according to these drawings.

Fig. 1 is the structural representation of a kind of denitrification deep bed filter tank that the utility model embodiment provides;

Fig. 2 is the structural representation of the water recoil assembly provided by the utility model embodiment;

Fig. 3 is a schematic structural view of the air recoil assembly provided by the embodiment of the present invention.

Explanation of reference signs:

1. Inlet pipe; 2. Impurity removal tank; 3. Sedimentation tank; 4. Filter tank; 5. Outlet pipe; 6. Clean water tank; 7. Filter rack; 8. Stop valve; Pool; 11, sludge pool; 12, sludge pump; 13, sludge pipe; 14, middle partition; 15, diversion block; 16, filter cover; 17, backwash water pipe; 181. Water pump; 182. Recoil water pipe; 183. Long punch; 184. Short punch; 19. Air recoil assembly; 191. Blower; 192. Recoil air pipe; 193. Short jet head; 194. Long jet head ; 20, water distribution layer; 21, supporting layer; 22, lower packing layer; 23, upper packing layer.

detailed description

In order to make those skilled in the art better understand the technical solution of the utility model, the utility model will be further introduced in detail below in conjunction with the accompanying drawings.

As shown in Figure 1-Figure 3, a denitrification deep bed filter, including impurity removal tank 2 and filter tank 4:

The impurity removal tank 2 is provided with a water inlet pipe 1, and the sewage is introduced into the impurity removal tank 2 through the water inlet pipe 1 for preliminary impurity removal treatment. The filter tank 4 is provided with an outlet pipe 5, and the outlet end of the outlet pipe 5 is provided with a clear water pool 6. The filtered clean water flows into the clean water pool 6 through the outlet pipe 5 to collect;

Between the impurity removal tank 2 and the filter tank 4, there is a sedimentation tank 3 that drives the water flow from bottom to top and then from top to bottom, so that the sewage after preliminary removal of impurities enters the sedimentation tank 3 and flows from bottom to top first , and then flow from top to bottom, which can increase the flow path of sewage and accelerate the precipitation efficiency of particulate impurities in sewage;

The filter tank 4 is provided with a water distribution layer 20, a supporting layer 21, a lower packing layer 22 and an upper packing layer 23 from bottom to top;

The clear water pool 6 is provided with a water recoil assembly 18 for independently supplying water to the lower packing layer 22 and the upper packing layer 23, which can perform independent and layered water supply operations on the lower packing layer 22 and the upper packing layer 23, so that the lower packing layer The impurity particles remaining after filtering on 22 and the upper packing layer 23 can be completely cleaned and recoiled, avoiding the sharp drop of recoil water pressure caused by the contact of a single layer of recoil water supply with a thicker packing layer, which cannot perform efficient recoil. flushing, which greatly improves the effect of water recoil;

The filter tank 4 is provided with a backwash water pipe 17, and the inlet end of the backwash water pipe 17 is provided with a filter cover 16, so that the sewage after backwashing is discharged outwards through the backwash water pipe 17, and under the blocking of the filter cover 16, avoiding The filler in the filler layer is washed out of the filter tank 4 .

The water recoil assembly 18 includes a water pump 181 arranged in the clear water tank 6, the water outlet of the water pump 181 is provided with a recoil water pipe 182 extending into the filter tank 4, and the recoil water pipe 182 is provided with intervals extending to the lower packing layer 22. With the short punch 184 and the long punch 183 at the bottom of the upper packing layer 23, the water pump 181 draws the clear water in the clear water tank 6 into the recoil water pipe 182, and is ejected by the short punch 184 and the long punch 183, respectively to the lower The packing layer 22 and the upper packing layer 23 are subjected to backwash water treatment, so that the particulate impurities on the lower packing layer 22 and the upper packing layer 23 can be recoil cleaned.

It also includes a gas recoil assembly 19, the gas recoil assembly 19 includes a blower 191, the air outlet of the blower 191 is provided with a recoil air pipe 192 extending into the filter tank 4, and the recoil air pipe 192 is provided with intervals extending to the lower packing layer 22 and the short jet nozzle 193 and the long jet nozzle 194 at the bottom of the upper packing layer 23, the air blower 191 starts to extract the external air into the recoil air pipe 192, and is ejected by the short jet nozzle 193 and the long jet nozzle 194, respectively to the lower filler The layer 22 and the upper packing layer 23 are subjected to recoil gas treatment, so that the particles and impurities on the lower packing layer 22 and the upper packing layer 23 can be recoil cleaned.

The inner wall of the impurity removal tank 2 is provided with a V-shaped filter holder 7, and the bottom of the filter holder 7 is connected with the sewage collection tank 10 through the sewage pipe 9, and the sewage pipe 9 is provided with a shut-off valve 8, and the filter holder 7 can enter into The granular sludge in the sewage in the impurity removal tank 2 is filtered out, and after opening the stop valve 8, the sludge enters the sewage collection tank 10 through the sewage pipe 9 for collection, and the granular sludge on the filter holder 7 can be removed Play the effect of automatic cleaning.

The inner wall of the sedimentation tank 3 is provided with a middle partition 14, and the inner walls of the sedimentation tank 3 and the middle partition 14 are misaligned with a tapered diversion block 15, and the diversion block 15 is located in the channel where the sewage in the sedimentation tank 3 flows from bottom to top In this way, the sewage can be diverted and guided, and the contact area between the sewage and the diversion block 15 can be increased, so as to accelerate the sedimentation efficiency of the sludge in the sewage.

The bottom of the sedimentation tank 3 is provided with a sludge tank 11, and a sludge pump 12 is arranged in the sludge tank 11, and the sludge pump 12 is connected with the sewage collection tank 10 through a sludge pipe 13, and the sludge deposited in the sedimentation tank 3 Enter the sludge pool 11 to collect, and under the action of the sludge pump 12, enter the sludge collection tank 10 through the sludge pipe 13 to collect, so that the automatic sewage discharge effect of the sludge can be realized.

Some exemplary embodiments of the present utility model have been described above only by way of illustration. Undoubtedly, for those skilled in the art, without departing from the spirit and scope of the present utility model, various Modifications are made to the described embodiments. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the protection scope of the claims of the present utility model.

Claims (7)

1. The utility model provides a denitrification deep bed filtering pond, includes edulcoration pond (2) and filtering ponds (4), its characterized in that:

a water inlet pipe (1) is arranged on the impurity removing tank (2), a water outlet pipe (5) is arranged on the filtering tank (4), and a clean water tank (6) is arranged at the outlet end of the water outlet pipe (5);

a sedimentation tank (3) for driving water flow to flow from bottom to top and then from top to bottom is arranged between the impurity removal tank (2) and the filtering tank (4);

a water distribution layer (20), a supporting layer (21), a lower packing layer (22) and an upper packing layer (23) are sequentially arranged in the filtering tank (4) from bottom to top;

and a water backflushing assembly (18) which supplies water to the lower packing layer (22) and the upper packing layer (23) independently is arranged on the clean water tank (6).

2. The denitrification deep-bed filter according to claim 1, characterized in that: the water backflushing assembly (18) comprises a water pump (181) arranged in the clean water tank (6), a water outlet of the water pump (181) is provided with a backflushing water pipe (182) extending into the filter tank (4), and the backflushing water pipe (182) is provided with a short punch (184) and a long punch (183) at intervals, wherein the short punch and the long punch extend to the bottoms of the lower packing layer (22) and the upper packing layer (23).

3. The denitrification deep-bed filter according to claim 1, characterized in that: also comprises a gas recoil component (19);

the gas backflushing assembly (19) comprises a blower (191), a backflushing gas pipe (192) extending into the filter tank (4) is arranged at a gas outlet of the blower (191), and short gas nozzles (193) and long gas nozzles (194) extending to the bottoms of the lower packing layer (22) and the upper packing layer (23) are arranged on the backflushing gas pipe (192) at intervals.

4. The denitrification deep-bed filter according to claim 1, characterized in that: the inner wall of the impurity removal tank (2) is provided with a V-shaped filter frame (7), the bottom of the filter frame (7) is connected with a sewage collection tank (10) through a sewage discharge pipe (9), and a stop valve (8) is arranged on the sewage discharge pipe (9).

5. The denitrification deep-bed filter according to claim 1, characterized in that: the inner wall of the sedimentation tank (3) is provided with a middle partition plate (14), and conical flow guide blocks (15) are arranged on the inner walls of the sedimentation tank (3) and the middle partition plate (14) in a staggered mode.

6. The denitrification deep-bed filter according to claim 1, characterized in that: the bottom of sedimentation tank (3) is provided with sludge impoundment (11), and is provided with sludge pump (12) in sludge impoundment (11), and sludge pump (12) are connected with dirty pond (10) of collection through sludge pipe (13).

7. The denitrification deep-bed filter according to claim 1, characterized in that: a backwashing water pipe (17) is arranged on the filtering tank (4), and a filter cover (16) is arranged at the inlet end of the backwashing water pipe (17).

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