CN218810827U - Denitrification deep bed filter capable of reducing dissolved oxygen in inlet water - Google Patents
Denitrification deep bed filter capable of reducing dissolved oxygen in inlet water Download PDFInfo
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- CN218810827U CN218810827U CN202222364099.6U CN202222364099U CN218810827U CN 218810827 U CN218810827 U CN 218810827U CN 202222364099 U CN202222364099 U CN 202222364099U CN 218810827 U CN218810827 U CN 218810827U
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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
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Abstract
The utility model discloses a denitrification deep bed filtering pond capable of reducing dissolved oxygen, which comprises a filtering pond body, a water inlet system and a backwashing system. The water inlet system adopts a unique water distribution pipe structure, the front end of the water inlet system is provided with a slag blocking filter screen and a slag discharge pipe, the backwashing drainage channel, the water inlet channel and the water distribution channel are arranged on the same side by the backwashing system, and the filter material and the filter bricks in the filter body can be selected from conventional products and also can be selected from peculiar patent products. The utility model provides a deep bed filtering pond of denitrification simple structure can not only solve the problem that traditional deep bed filtering pond drop oxygenated, has reduced the consumption of carbon source, has saved the running cost, can also open the backwash process through the automatic opening of raw water level change simultaneously, reduces investment cost.
Description
Technical Field
The utility model relates to a denitrification filtering pond technical field especially relates to a can reduce denitrification deep bed filtering pond of dissolved oxygen of intaking.
Background
At present, in order to ensure the standard discharge of TN in effluent in many domestic sewage treatment plants, a denitrification filter system is additionally arranged after a majority of projects are carried out for upgrading and transforming, and nitrate nitrogen in the sewage is removed by promoting the action of denitrification flora through an additional carbon source. However, when the wastewater contains dissolved oxygen, the external carbon source preferentially utilizes molecular oxygen as an electron acceptor to react with the wastewater. In the case of sodium acetate, the amount of sodium acetate added is generally =4.51 × nitrate nitrogen removal amount +2.73 × nitrite nitrogen removal amount +3.57 × dissolved oxygen, and thus it is seen that a large amount of the external carbon source is consumed by the dissolved oxygen. Meanwhile, if the content of dissolved oxygen in the sewage is too high, the biological activity of the denitrifying bacteria flora is also inhibited, and the reaction efficiency is further influenced. Therefore, it is very important to reduce the dissolved oxygen of the inlet water of the denitrification filter.
The denitrification filter tank commonly used at present comprises a denitrification deep bed filter tank and an upward flow denitrification filter tank. Compared with an upflow denitrification filter tank, the denitrification deep bed filter tank has the advantages of obvious filtering effect, good effluent quality, low construction difficulty, low engineering construction cost and wide application prospect. However, because the existing denitrification deep-bed filter tank flows water through a water outlet channel by gravity, the problem of drop oxygenation generally exists, 2-4 mg/L of dissolved oxygen is additionally brought into denitrification inlet water, the carbon source adding cost is increased by 20-30% or even higher, and great waste is caused.
Disclosure of Invention
To the technical problem, the utility model provides a can reduce deep bed filtering pond of denitrification of dissolved oxygen that intakes, this deep bed filtering pond of denitrification simple structure can solve the problem that the normal in-process drop oxygenated of intaking in the filtering pond, has avoided because of the drop oxygenates the carbon source consumption that causes, has saved the running cost, and opening of the raw water district liquid level change automatic control backwash process that can be through the deep bed filtering pond of denitrification simultaneously stops, need not to install instruments such as pressure gauge, has saved investment cost.
In order to achieve the above object, the utility model adopts the following technical scheme:
a denitrification deep bed filter capable of reducing dissolved oxygen in inlet water comprises a filter body, a water inlet system and a backwashing system; the filter body is sequentially provided with a raw water area, a filter material layer, a supporting layer, filter bricks and a water and air distribution channel from top to bottom, and the water and air distribution channel is connected with a water outlet pipe; the water inlet system comprises a water inlet channel, a water distribution channel and water distribution pipes which are communicated in sequence, the water inlet channel and the water distribution channel are arranged adjacently and are positioned at the upper part of the side surface of the filter body, the water distribution pipes comprise water distribution main pipes and a plurality of water distribution branch pipes, the water distribution branch pipes are distributed in the original water area, and the water level of the original water area always submerges the water distribution branch pipes; the backwashing system comprises a backwashing air inlet pipe, a backwashing water drainage channel and a backwashing water drainage pipe, wherein the backwashing air inlet pipe and the backwashing water inlet pipe are arranged at the lower part of the side surface of the filter body, and the backwashing water drainage channel is arranged at the upper part of the side surface of the filter body and is provided with the backwashing water drainage pipe.
Furthermore, the water distribution channel is provided with a slag blocking filter screen and a slag discharge pipe, and the slag discharge pipe is communicated to the backwashing water drainage channel.
Furthermore, the aperture of the residue blocking filter screen is 0.5-3 mm.
Furthermore, the backwashing drainage channel, the water inlet channel and the water distribution channel are arranged on the same side of the filter body; the overflow port of the backwashing drainage channel is positioned at the lower end of the water distribution channel.
Furthermore, the liquid level of the water inlet channel is higher than that of the water distribution channel, a baffle is arranged between the water inlet channel and the water distribution channel, and the top surface of the baffle is provided with an inclined slope in the direction of the water distribution channel.
Furthermore, the distance between the water distribution branch pipe and the top of the filter material layer is 20-50 cm; a plurality of downward water distribution holes are arranged on the water distribution branch pipes at intervals.
Furthermore, a backwashing air inlet valve is arranged on the backwashing air inlet pipe, a backwashing water inlet valve is arranged on the backwashing water inlet pipe, and a backwashing water discharge valve is arranged on the backwashing water discharge pipe.
Furthermore, a water inlet valve is arranged on the water distribution pipe.
The utility model provides a can reduce deep bed filtering pond of denitrification of dissolved oxygen of intaking, compare with prior art, its beneficial effect lies in:
(1) By adopting a unique water inlet and distribution mode, the problem of drop oxygenation in the water inlet and distribution process of the denitrification deep bed filter is solved, the waste of a large amount of carbon source agents is avoided, and the operation cost is saved;
specifically, the water distribution main pipe and the water distribution branch pipe which is always submerged in the original water area are adopted for water inlet and water distribution, so that the problem of drop oxygenation in the water inlet and water distribution process of the denitrification deep bed filter is solved, the waste of a large amount of carbon source medicaments is avoided, and the operation cost is saved;
(2) The start and stop of the backwashing process are automatically controlled according to the liquid level change of the raw water area of the denitrification deep bed filter, meters such as a pressure gauge and the like do not need to be installed, and the investment cost is saved;
(3) The backwashing drainage channel, the water inlet channel and the water distribution channel are arranged on the same side, so that the slag discharge pipe can discharge impurities trapped on the slag blocking filter screen conveniently; meanwhile, the overflow port of the backwashing drainage channel is arranged at the lower end of the water distribution channel, so that the backwashing water quantity is saved.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
In the figure, 1-the filter body; 2-water inlet channel; 3-distributing the canal; 4-a slag-blocking filter screen; 5-a slag discharge pipe; 6-a slag discharge valve; 7-water distribution pipe; 8-a water inlet valve; 9-raw water area; 10-a filter material layer; 11-a support layer; 12-a filter brick; 13-water distribution and air distribution channel; 14-a water outlet pipe; 15-water outlet valve; 16-emptying the pipe; 17-an evacuation valve; 18-backwashing an air inlet pipe; 19-backwashing air inlet valves; 20-backwashing the water inlet pipe; 21-backwash inlet valve; 22-backwash drainage channel; 23-backwashing a drain pipe; 24-backwash drain valve
Detailed Description
In order to facilitate understanding of those skilled in the art, the present invention will be further described with reference to the following embodiments and the accompanying drawings. The drawings in the specification are schematic diagrams, and the drawings are used for assisting in explaining the concept of the present invention and schematically show the structures of the parts and the mutual relations thereof.
As shown in FIG. 1, the present embodiment provides a denitrification deep-bed filter capable of reducing dissolved oxygen in influent water, which comprises a filter body 1, a water inlet system and a backwashing system.
The interior of the filter body 1 is respectively provided with a raw water area 9, a filter material layer 10, a supporting layer 11, filter bricks 12 and a water distribution and air distribution channel 13 from top to bottom, the water distribution and air distribution channel 13 is connected with an emptying pipe 16 and a water outlet pipe 14, and the emptying pipe 16 and the water outlet pipe 14 are respectively provided with an emptying valve 17 and a water outlet valve 15.
The water inlet system of the filter comprises a water inlet channel 2, a water distribution channel 3 and a water distribution pipe 7, wherein the upper part of the water distribution channel 3 is provided with a slag blocking filter screen 4 and a slag discharge pipe 5, the slag discharge pipe 5 is provided with a slag discharge valve 6, and the water distribution pipe 7 is provided with a water inlet valve 8.
The backwashing system of the filter comprises a backwashing air inlet pipe 18, a backwashing water inlet pipe 20, a backwashing water drain channel 22 and a backwashing water drain pipe 23, wherein the backwashing air inlet pipe 18 is provided with a backwashing air inlet valve 19, the backwashing water inlet pipe 20 is provided with a backwashing water inlet valve 21, and the backwashing water drain pipe 23 is provided with a backwashing water drain valve 24.
Wherein, the filtering material of the filtering material layer 10 can be quartz sand, artificial ceramsite or novel medium filtering material, etc. The novel medium filter material is an epoxy resin filter material and comprises epoxy resin, a curing agent, a diluent, a modifier, a filler and a coupling agent which are uniformly mixed.
Wherein the curing agent can be a room temperature curing agent such as aliphatic polyamine or a high temperature curing agent such as aromatic polyamine;
the diluent can be propylene oxide butyl ether, propylene oxide phenyl ether and other reactive diluents;
the modifier can be one or more of polysulfide rubber, polyvinyl butyral, phenolic resin and the like;
the filler comprises one or more of quartz powder, graphite powder, glass fiber, starch and the like;
the coupling agent can be a silane coupling agent or a ligand type titanic acid coupling agent. The filter brick can be selected from T-shaped filter brick, S-shaped filter brick or air-water universal square filter brick (CN 202011626729.1), novel T-shaped filter brick (CN 202023306943.7) and the like.
The water and air distribution channel 13 is arranged at the bottom of the filter pool and can be used as a water outlet channel during normal filtration, the water and air distribution channel 13 carries out air-water primary distribution during backwashing, and the water and air distribution channel 13 can adopt different structural designs according to the type of the selected filter bricks 12; if the filter bricks 12 are T-shaped filter bricks or novel T-shaped filter bricks, the water distribution and air distribution channel 13 adopts a central longitudinal arrangement structure at the bottom of the filter tank and is provided with a cover plate; if the filter bricks 12 are S-shaped filter bricks or air-water general square filter bricks, the water and air distribution channel 13 adopts a transverse arrangement structure at the front end of the bottom of the filter tank and is provided with an air inlet main pipe and a branch pipe.
Wherein, the inlet channel 2 and the adjacent setting of distribution channel 3 just all are located the side upper portion in filtering pond, and the liquid level of inlet channel 2 is higher than the liquid level of distribution channel 3, and the raw water in the inlet channel 2 turns over the baffle between the two and gets into distribution channel 3, guarantees that the filtering pond can evenly intake, and the baffle top is not the plane, and the baffle has certain slope towards distribution channel 3.
The upper part of the water distribution channel 3 is provided with a slag blocking filter screen 4 which can intercept larger particles of impurities to enter the water distribution pipe 7 so as to avoid blocking the water distribution pipe 7, and the aperture of the slag blocking filter screen 4 is designed to be 0.5-3 mm.
A slag discharge pipe 5 is arranged below the slag blocking filter screen 4, the pipe orifice of the slag discharge pipe 5 is flush with the slag blocking filter screen 4, the other end of the slag discharge pipe 5 is communicated with a backwashing drainage channel 22, and a valve (a slag discharge valve 6) is arranged on the slag discharge pipe 5.
The water distribution pipes 7 comprise a water distribution trunk pipe and a plurality of water distribution branch pipes, the installation positions of the water distribution trunk pipe and the water distribution branch pipes are arranged at the lower end of the backwashing drainage channel 22, raw water enters the filter tank through the water distribution trunk pipe and is uniformly distributed into the plurality of water distribution branch pipes, the water distribution branch pipes cross the whole filter tank, the distance between the water distribution branch pipes and the filter material layer 10 is 20-50 cm, and the number and the size of the water distribution branch pipes can be flexibly designed according to the specific water quantity and the size of the filter tank.
The water distribution branch pipes are provided with a plurality of downward water distribution holes at intervals, the number and the interval size of the water distribution holes can be flexibly designed according to the specific water quantity and the size of the filter, and the pore diameter of the water distribution holes is designed to be 1-3 mm, so that the water distribution branch pipes are prevented from being blocked due to the fact that a large amount of large-volume impurities enter the water distribution holes in the backwashing process.
Wherein, the backwash air inlet pipe 18 is positioned at the side surface of the filter brick 12, the backwash water inlet pipe 20 is positioned at the side surface of the water and air distribution channel 13, and the backwash water outlet pipe 23 is positioned below the backwash water outlet channel 22.
The backwashing water drainage channel 22 is arranged on the same side of the water inlet channel 2 and the water distribution channel 3, so that impurities can be conveniently discharged from the slag discharge pipe 5 in the water distribution channel 3. The overflow port of the backwashing water drainage channel 22 is positioned at the lower end of the water distribution channel 3, so that the backwashing water quantity can be saved.
When the filter is backwashed, the water level is required to be reduced firstly, and the water level is reduced to the position which is flush with the water distribution branch pipe, so that the water distribution branch pipe is ensured to be always in the water and not to be contacted with the air, and the filter is prevented from being oxygenated in the water inlet and water distribution process.
Based on the technical scheme, the filtering process of the denitrification deep-bed filter capable of reducing dissolved oxygen in inlet water is as follows:
when the raw water enters the water distribution channel 3, the raw water is firstly filtered by the slag blocking filter screen 4 to intercept larger impurities and avoid the impurities from blocking the water distribution pipe 7, the raw water passing through the slag blocking filter screen 4 flows into the filter tank through the water distribution pipe 7 and uniformly enters the raw water area 9 through the water distribution holes on the water distribution branch pipe, and the raw water is filtered by the filter material layer 10 and the bearing layer 11 in the filter tank, then enters the water distribution and air distribution channel 13 through the filter bricks 12 and is discharged from the water outlet pipe 14.
The backwashing process of the denitrification deep bed filter capable of reducing the dissolved oxygen in the inlet water of the embodiment is as follows:
after long-time filtration, the filter material in the filter tank is gradually blocked, the filtration speed gradually becomes slow, the liquid level of the raw water zone 9 gradually rises, and when the liquid level rises to be level with the liquid level in the water distribution channel 3, the water distribution pipe 7 automatically stops water distribution and starts backwashing. When the filter enters backwashing, the water inlet valve 8 is closed, the liquid level of the filter begins to drop, when the liquid level of the filter drops to be level with the water distribution branch pipe, the water outlet valve 15 is closed, the backwashing air inlet valve 19 is opened, and gas washing is started; after independent air washing is carried out for 2-3 minutes, the backwashing water inlet valve 21 and the backwashing water discharge valve 24 are opened, and air-water combined backwashing is started; after air-water combined backwashing is carried out for 5-10 minutes, the backwashing air inlet valve 19 is closed, air washing is stopped, and water rinsing is carried out for 3-5 minutes. And (3) opening the slag discharge valve 6 while rinsing with water, and flushing impurities on the slag blocking filter screen into the backwashing drainage channel along with water. After the water rinsing is finished, the deslagging valve 6, the backwashing water inlet valve 21 and the backwashing water discharge valve 24 are closed, the water inlet valve 8 and the water outlet valve 15 are opened, and the filtering pool can immediately filter without reducing the liquid level.
In conclusion, the denitrification deep-bed filter capable of reducing dissolved oxygen of the embodiment can solve the problem of drop oxygenation of the denitrification deep-bed filter through a unique water inlet and distribution structure, avoids waste of a large amount of carbon source agents, saves the operation cost, can automatically start and stop a backwashing process through the change of the liquid level of the raw water region 9, does not need to install instruments such as a pressure gauge and the like, and reduces the investment cost. With backwash drainage channel 22 and inlet channel 2, join in marriage the ditch 3 setting in one side, be convenient for arrange the impurity that slag pipe 5 discharged on the sediment filter screen 4, backwash drainage channel 22 overflow mouth sets up at joining in marriage ditch 3 lower extreme, has reduced the backwash water consumption.
The above embodiment is only for explaining the utility model discloses a technical thought, can not injecing with this the utility model discloses a protection scope, all according to the utility model provides a technical thought, any change of doing on technical scheme basis all falls into the utility model discloses within the protection scope.
Claims (8)
1. A denitrification deep bed filter capable of reducing dissolved oxygen in inlet water is characterized by comprising a filter body, a water inlet system and a backwashing system; the filter body is sequentially provided with a raw water area, a filter material layer, a supporting layer, filter bricks and a water and air distribution channel from top to bottom, and the water and air distribution channel is connected with a water outlet pipe;
the water inlet system comprises a water inlet channel, a water distribution channel and water distribution pipes which are communicated in sequence, the water inlet channel and the water distribution channel are arranged adjacently and are positioned at the upper part of the side surface of the filter body, the water distribution pipes comprise water distribution main pipes and a plurality of water distribution branch pipes, the water distribution branch pipes are distributed in the original water area, and the water level of the original water area always submerges the water distribution branch pipes;
the backwashing system comprises a backwashing air inlet pipe, a backwashing water drainage channel and a backwashing water drainage pipe, wherein the backwashing air inlet pipe and the backwashing water inlet pipe are arranged at the lower part of the side surface of the filter body, and the backwashing water drainage channel is arranged at the upper part of the side surface of the filter body and is provided with the backwashing water drainage pipe.
2. The deep bed denitrification filter with dissolved oxygen reduction of the influent as set forth in claim 1, wherein the distribution channel is provided with a slag retaining screen and a slag discharge pipe, and the slag discharge pipe is communicated to the backwash water discharge channel.
3. The denitrification deep-bed filter capable of reducing dissolved oxygen in influent water according to claim 2, wherein the aperture of the slag-retaining screen is 0.5-3 mm.
4. A denitrification deep bed filter capable of reducing dissolved oxygen in influent water according to any one of claims 1 to 3, wherein the backwash water drainage channel is arranged on the same side of the filter body as the influent channel and the distribution channel; the overflow port of the backwashing drainage channel is positioned at the lower end of the water distribution channel.
5. A denitrification deep bed filter capable of reducing dissolved oxygen in influent water according to any one of claims 1 to 3, wherein the liquid level of the influent channel is higher than the liquid level of the distribution channel, a baffle plate is arranged between the influent channel and the distribution channel, and the top surface of the baffle plate is provided with an inclined slope towards the distribution channel.
6. The deep bed denitrification filter capable of reducing dissolved oxygen in influent water according to any one of claims 1 to 3, wherein the distance between the water distribution branch pipe and the top of the filter material layer is 20-50 cm; a plurality of downward water distribution holes are arranged on the water distribution branch pipes at intervals.
7. The deep bed denitrification filter with the function of reducing dissolved oxygen in the influent as claimed in any one of claims 1 to 3, wherein a backwash air inlet valve is arranged on the backwash air inlet pipe, a backwash water inlet valve is arranged on the backwash water inlet pipe, and a backwash water discharge valve is arranged on the backwash water discharge pipe.
8. The deep bed denitrification filter capable of reducing dissolved oxygen in influent water according to any one of claims 1 to 3, wherein the water distributor is provided with an inlet valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222364099.6U CN218810827U (en) | 2022-09-06 | 2022-09-06 | Denitrification deep bed filter capable of reducing dissolved oxygen in inlet water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222364099.6U CN218810827U (en) | 2022-09-06 | 2022-09-06 | Denitrification deep bed filter capable of reducing dissolved oxygen in inlet water |
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| Publication Number | Publication Date |
|---|---|
| CN218810827U true CN218810827U (en) | 2023-04-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222364099.6U Active CN218810827U (en) | 2022-09-06 | 2022-09-06 | Denitrification deep bed filter capable of reducing dissolved oxygen in inlet water |
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| CN (1) | CN218810827U (en) |
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2022
- 2022-09-06 CN CN202222364099.6U patent/CN218810827U/en active Active
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