CN210193511U - Carbon source adding device for denitrification filter - Google Patents
Carbon source adding device for denitrification filter Download PDFInfo
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- CN210193511U CN210193511U CN201920511522.6U CN201920511522U CN210193511U CN 210193511 U CN210193511 U CN 210193511U CN 201920511522 U CN201920511522 U CN 201920511522U CN 210193511 U CN210193511 U CN 210193511U
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Abstract
The utility model discloses a denitrification filtering pond carbon source is thrown and is put device, including denitrification filtering pond, inlet tube, feeding pipe, denitrification pond is including intake zone, reaction zone and play pool, and denitrification pond's intake zone installs into water DO appearance and the nitrate nitrogen instrument of intaking, play water DO appearance, nitrate nitrogen instrument and COD detecting instrument are installed to the play pool, install intake pump and intake flowmeter on the inlet tube pipeline, the delivery end of inlet tube is connected with the carbon source misce bene case that has mixing function step by step, feeding pipe also feeds through and carries out the feed through external feed pump with carbon source misce case intercommunication, and installs on the feeding pipe and throw the material flowmeter, the delivery port and the intake zone intercommunication of carbon source misce case. The utility model discloses can make the carbon source enter into the reaction zone with the district intensive mixing back of intaking when throwing to can be according to the quality of water condition intermittent type nature of intaking and throw the carbon source, reduced throwing of carbon source and thrown the cost.
Description
Technical Field
The utility model relates to a sewage treatment plant and relevant application technical field especially relate to a denitrification filter carbon source throws feeder apparatus.
Background
With the increasing importance of the state on water pollution, the discharge standard of sewage treatment plants is gradually improved to the first class A standard in the discharge standard of pollutants for municipal sewage treatment plants (GB 18918-2002). As the carbon-nitrogen ratio of urban sewage in China is generally lower, in order to control the total nitrogen index of effluent to reach the standard and consider the factors of investment, progress, effect and the like of upgrading transformation, the post-deep bed denitrification filter tank process is widely operated in first-level A upgrading transformation. The operation of the deep bed denitrification filter mainly depends on an external carbon source to control denitrification reaction to ensure that the total nitrogen index of effluent reaches the standard, the activity of a biological membrane in the denitrification filter is a core factor of the denitrification reaction, and the activity of the biological membrane needs to be maintained by the external carbon source.
The nitrification reaction is an important link for removing nitrogen in the biological treatment process, in the biological treatment and denitrification of sewage, ammoniated organic nitrogen is converted into ammonia nitrogen, the ammonia nitrogen generates nitrate nitrogen and nitrite nitrogen under the action of nitrobacteria, and the two kinds of nitrogen take organic matters as electron acceptors in an anoxic environment under the action of denitrifying bacteria and are finally converted into nitrogen to be released into the air.
At present, most sewage treatment plants adopt a carbon source adding mode to improve the denitrification effect in order to ensure the normal operation of denitrification reaction and meet increasingly strict effluent index requirements. The carbon source adding mode is as follows: the carbon source liquid is added into the water through a metering pump, but the adding distribution is not uniform, so that the problems of insufficient local carbon source, low carbon source utilization rate and the like in the sewage are easily caused, and the denitrification effect of the sewage is influenced. Meanwhile, the existing carbon source adding system dynamically controls the adding amount of the external carbon source mainly according to the detection of single indexes such as nitrate, dissolved oxygen and the like, and mostly adopts constant adding or one-time large adding as an adding mode during adding, so that the reaction is insufficient, the reaction time is long, and excessive adding is easy to occur.
SUMMERY OF THE UTILITY MODEL
The present invention aims at solving at least one of the technical problems in the related art to a certain extent. For this, an object of the utility model is to provide a denitrification filtering pond carbon source throws feeder apparatus, can make the carbon source can enter into the reaction zone with the district intensive mixing back of intaking when throwing, guarantee that carbon source concentration homogeneous and moderate in the reaction zone, set up nitrate nitrogen and DO instrumentation at the water inlet simultaneously, the delivery port sets up nitrate nitrogen, DO and goes out water COD instrumentation, has guaranteed that the intermittent type nature of carbon source is thrown and has thrown, has reduced the throwing of carbon source and has thrown the cost.
The technical scheme of the utility model as follows:
a denitrification filter carbon source feeding device comprises a denitrification filter, a water inlet pipe and a feeding pipe, wherein the denitrification filter comprises a water inlet area, a reaction area and a water outlet area, the water inlet area of the denitrification filter is provided with a water inlet DO instrument and a water inlet nitrate nitrogen instrument, and the water outlet area is provided with a water outlet DO instrument, a nitrate nitrogen instrument and a COD detection instrument; install intake pump and intake flowmeter on the inlet tube pipeline, the play water end of inlet tube is connected with the carbon source misce bene case that has mixing function step by step, throw the material pipe and also feed through external feed pump with carbon source misce bene case intercommunication, and throw and install on the material pipe and throw the material flowmeter, the delivery port and the district's intercommunication of intaking of carbon source misce bene case.
Preferably, the carbon source homogenizing mixing box comprises a third mixing box, a second mixing box arranged in the third mixing box and a first mixing box arranged in the second mixing box, and the third mixing box, the second mixing box and the first mixing box are positioned on the same central line.
Preferably, the first mixing box is fixed in the third mixing box, the top of the first mixing box is provided with a water inlet and a feed inlet, the water inlet and the feed inlet are respectively communicated with a water inlet pipe and a feeding pipe, the water inlet pipe and the feeding pipe both extend into the first mixing box, and the upper part of the side surface of the first mixing box is provided with a water outlet notch.
Preferably, the second mixing box is fixed in the third mixing box, and the opening at the top of the second mixing box has a setting, a plurality of water seepage holes are opened on the upper portion in the side of the second mixing box.
Preferably, the inner diameter of the second mixing box is 1.1 to 1.3 times of the outer diameter of the first mixing box, and the inner diameter of the third mixing box is 1.1 to 1.3 times of the outer diameter of the second mixing box.
Preferably, the top of the third mixing box is provided with a water inlet and a feed inlet for a water inlet pipe and a feeding pipe to extend into, the bottom of the third mixing box is provided with a water outlet communicated with a water inlet pump pipeline, the lower part of the third mixing box is fixedly provided with a conical baffle plate, the conical baffle plate is arranged below the second mixing box, and the middle part of the conical baffle plate is provided with a water outlet hole.
The utility model has the advantages that: through the three-stage mixing box of the carbon source mixing homogenizing box, the carbon source added into the three-stage mixing box can be well dissolved in the sewage, and the local concentration cannot be too high; the carbon source can be intermittently added through the water inlet DO instrument and the water inlet nitrate nitrogen instrument which are arranged in the water inlet area, and the water outlet DO instrument, the nitrate nitrogen instrument and the COD detection instrument which are arranged in the water outlet area to maintain the activity of the biological membrane, so that the economy of adding the carbon source is ensured, the activity of the biological membrane is also maintained, and the smooth proceeding of the denitrification reaction is ensured.
Drawings
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic structural view of a carbon source adding device of a denitrification filter tank provided by the utility model;
FIG. 2 is a schematic structural diagram of a carbon source homogenizing box;
FIG. 3 is a schematic view of the first mixing box;
FIG. 4 is a schematic view of a second mixing box;
fig. 5 is a schematic structural view of a third mixing box.
In the figure: 1-denitrification filter; 2-a water inlet pump; 21-a water inlet flow meter; 2-a water inlet valve; 3-a feeding pipe; 31-a material feeding flow meter; 4-carbon source mixing box; 41-a first mixing tank; 42-a second mixing tank; 43-third mixing tank.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.
Examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.
Referring to fig. 1, a carbon source feeding device for a denitrification filter comprises a denitrification filter 1, a water inlet pipe and a feeding pipe 3, wherein the denitrification filter 1 comprises a water inlet area, a reaction area and a water outlet area (arranged in sequence from left to right in fig. 1), the water inlet area of the denitrification filter 1 is provided with a water inlet DO instrument and a water inlet nitrate nitrogen instrument, and the water outlet area is provided with a water outlet DO instrument, a nitrate nitrogen instrument and a COD detection instrument; install intake pump 2 and intake flowmeter 21 on the inlet tube pipeline, the play water end of inlet tube is connected with carbon source misce bene case 4 that has mixing function step by step, throwing material pipe 3 also feeds through and through external feed pump with carbon source misce bene case 4, for the convenience of control feeding volume, installs on throwing material pipe 3 and throws material flowmeter 31, carbon source misce bene case 4's delivery port and intake zone intercommunication can know and control the inflow according to intake pump 2 and intake flowmeter 21 on the inlet tube, simultaneously according to the inflow adjustment dosing.
Referring to fig. 2-5, the carbon source homogenizing tank 4 comprises a third mixing tank 43 with a decreasing height, a second mixing tank 42 disposed in the third mixing tank 43, and a first mixing tank 41 disposed in the second mixing tank 42, and the three mixing tanks are located on the same center line, and the sizes of the three mixing tanks 43 can be selected according to actual throughput requirements. As shown in fig. 3, the first mixing box 41 is fixed (welded or flange plate is made) in the third mixing box 43, and the top of the first mixing box is provided with a water inlet and a feed inlet, the water inlet and the feed inlet are respectively communicated with the water inlet pipe and the feeding pipe 3, the water inlet pipe and the feeding pipe 3 both extend into the first mixing box 41, the upper part of the side surface of the first mixing box 41 is provided with a water outlet, so that the sewage can flow out from the water outlet, when the carbon source is added, the sewage is primarily mixed with the carbon source at the bottom of the first mixing box 41 and increases with the sewage, and the primarily diluted carbon source flows out from the water outlet together with the sewage.
As shown in fig. 4, the second mixing box 42 is fixed (welded or flange plate is made) in the third mixing box 43, and the top opening of the second mixing box 42 is provided, the inner diameter of the second mixing box is 1.1-1.3 times of the outer diameter of the first mixing box 41, a plurality of water seepage holes are formed in the middle upper portion of the side surface of the second mixing box 42, when the sewage flowing out from the first mixing box 41 flows into the second mixing box 42, the sewage can be temporarily stored and further mixed, so that the concentration of the carbon source in the sewage is more uniform.
As shown in fig. 5, the inner diameter of the third mixing box 43 is 1.1-1.3 times of the outer diameter 42 of the second mixing box, the top of the third mixing box 43 is provided with a water inlet and a feed inlet for the water inlet pipe and the feeding pipe 3 to extend into, and the bottom of the third mixing box is provided with a water outlet communicated with the water inlet pump 5, the lower part of the third mixing box 43 is fixed with a conical baffle (cone), the conical baffle is arranged below the second mixing box 42, and the middle part of the conical baffle is provided with a water outlet hole, so that the sewage seeped from the second mixing box 42 can be temporarily stored through the third mixing box 43, carbon sources are further mixed, and flow out from the water outlet hole of the conical baffle, and the sewage mixed with carbon sources is pumped into the water inlet area from the water outlet via the water inlet pump 5.
Through the multistage carbon source and the sewage of mixing of three mixing tanks, guarantee that can be better when adding the carbon source make the even mixture of carbon source in the sewage.
The applicant needs to say that, in the present application, the related instruments and the water pump are both the existing mature technologies and have corresponding products sold in the market, and meanwhile, the installation of the pipeline, the bracket and the like is also the existing mature technologies, and the applicant does not describe the structure and the detailed working principle of the related instruments and the water pump again.
In the application, the intermittent regulation and control scheme of the denitrification filter under the first-level A discharge standard is as follows:
1. and (3) adding no carbon source, ensuring that the nitrate nitrogen values of inlet water and outlet water are basically equal, ensuring that the denitrification filter is in a physical filtration stage, and ensuring that the biological membrane is in a non-running state.
2. Activation of biofilms
According to the detection value C of the COD in the water outlet area0(if the effluent COD detection value C0The value is more than 40mg/L, the biomembrane activation is not suitable to be carried out, and in order to ensure that the COD of the effluent water does not exceed the standard due to the addition of the carbon source, the initial addition concentration is C-40-C0When the effluent water does not exceed 40mg/L, the larger the initial adding amount is, the better the carbon source is) is added, the COD concentration of the inlet water is increased, and the increment delta C is 40-C0And if the delta C is less than 0 (it needs to be noted that if the delta C is less than 0, the COD of the effluent is over 40mg/L, and the effluent has excessive risk and is not suitable for activating the biological membrane under the condition of not adding a carbon source), the activation of the biological membrane of the denitrification filter is not suitable for starting. If Δ C > 0, the increase in COD is 40-C0Adding carbon source according to the formula delta C ≈ 3 (DO)Into-DOGo out) (mg/L), and DOGo out< 0.5mg/L and C1-C0< 3mg/L (wherein C)0，C16 hours between detection) to verify the effectiveness of the biofilm.
3. Operation of biofilms
When the nitrate probe of the inlet water monitors the nitrate of the inlet water to be 12mg/L>CNO3-N>Starting to feed carbon source at 10mg/L, increasing the delta C to 6mg/L, and culturing the biological membrane;
nitrate C when entering waterNO3-N<Stopping adding the carbon source when the concentration is 10mg/L, stopping the adding for 120 hours when the temperature is lower than 20 ℃, and operating for 24 hours; when the temperature is more than or equal to 20 ℃, the stopping time reaches 240 hours, and the operation lasts 24 hours; at the time of stopping, when the influent nitrate value changes (out of the way)<10mg/L) is added, and the regulation and control are specifically carried out according to the specific nitrate content of the inlet water.
Nitrate C when entering waterNO3-N>12mg/L, carbon source addition amount Δ C ═ 3 (DO)Into-DOGo out)+5(NO3-NInto-NO3-NGo out)(mg/L)。
The following table is the relevant data (in mg/L) for one month using this regulatory protocol:
as can be seen from the table, the first to fourth days of biofilm activation were measured at a Δ C of 40-C0And (4) calculating by a formula, starting from day 5, in a biomembrane operation stage, adding a carbon source in the operation stage according to the classification condition, increasing the adding amount when the nitrate nitrogen exceeds 12mg/L, and controlling the rising trend of the nitrate nitrogen in effluent.
The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.
Claims (6)
1. The utility model provides a denitrification filtering pond carbon source is thrown and is thrown feeder apparatus, includes denitrification filtering pond, inlet tube, batch feed pipe, the denitrification pond is including intaking district, reaction zone and play pool, and the district of intaking in the denitrification pond installs into water DO appearance and the nitrate nitrogen instrument that intakes, its characterized in that: the water outlet area is provided with a water outlet DO instrument, a nitrate nitrogen instrument and a COD detection instrument, a water inlet pump and a water inlet flow meter are arranged on the water inlet pipe, the water outlet end of the water inlet pipe is connected with a carbon source mixing tank with a step-by-step mixing function, the feeding pipe is also communicated with the carbon source mixing tank and feeds through an external feeding pump, the feeding pipe is provided with a feeding flow meter, and the water outlet of the carbon source mixing tank is communicated with the water inlet area.
2. The carbon source adding device for the denitrification filter tank as claimed in claim 1, which is characterized in that: the carbon source mixing homogenizing box comprises a third mixing box, a second mixing box arranged in the third mixing box and a first mixing box arranged in the second mixing box, the three are positioned on the same central line, and every two adjacent mixing boxes are communicated.
3. The carbon source adding device for the denitrification filter tank as claimed in claim 2, which is characterized in that: the first mixing box is fixed in the third mixing box, the top of the first mixing box is provided with a water inlet and a feed inlet, the water inlet and the feed inlet are respectively communicated with a water inlet pipe and a feeding pipe, the water inlet pipe and the feeding pipe both extend into the first mixing box, and the upper part of the side surface of the first mixing box is provided with a water outlet notch.
4. The carbon source adding device for the denitrification filter tank as claimed in claim 2, which is characterized in that: the second mixing box is fixed in the third mixing box, and second mixing box open-top has the setting, upper portion is opened on the side of second mixing box has a plurality of infiltration holes.
5. The carbon source adding device for the denitrification filter tank as claimed in claim 3, which is characterized in that: the inner diameter of the second mixing box is 1.1-1.3 times of the outer diameter of the first mixing box, and the inner diameter of the third mixing box is 1.1-1.3 times of the outer diameter of the second mixing box.
6. The carbon source adding device for the denitrification filter tank as claimed in claim 2, which is characterized in that: the top of the third mixing box is provided with a water inlet and a feed inlet, into which a water inlet pipe and a feeding pipe extend, the bottom of the third mixing box is provided with a water outlet communicated with a water inlet pump pipeline, the lower part of the third mixing box is fixedly provided with a conical baffle plate, the conical baffle plate is arranged below the second mixing box, and the middle part of the conical baffle plate is provided with a water outlet hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920511522.6U CN210193511U (en) | 2019-04-16 | 2019-04-16 | Carbon source adding device for denitrification filter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920511522.6U CN210193511U (en) | 2019-04-16 | 2019-04-16 | Carbon source adding device for denitrification filter |
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| CN210193511U true CN210193511U (en) | 2020-03-27 |
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| CN201920511522.6U Active CN210193511U (en) | 2019-04-16 | 2019-04-16 | Carbon source adding device for denitrification filter |
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