CN214654291U - Efficient biological denitrification system based on shortcut nitrification-denitrification technology - Google Patents
Efficient biological denitrification system based on shortcut nitrification-denitrification technology Download PDFInfo
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- CN214654291U CN214654291U CN202023307262.2U CN202023307262U CN214654291U CN 214654291 U CN214654291 U CN 214654291U CN 202023307262 U CN202023307262 U CN 202023307262U CN 214654291 U CN214654291 U CN 214654291U
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Abstract
The utility model relates to a high-efficiency biological denitrification system based on a short-cut nitrification-denitrification technology, which comprises a biochemical water tank, a jet aerator, a fan, a steam auxiliary heating device, a dissolved oxygen control unit, a temperature control unit, an acid-base control unit and a carbon source supplement unit, wherein an aeration and oxygenation area, a plug flow stirring area and a mud-water separation area are arranged in the biochemical water tank at intervals; the wastewater returns to the water inlet end through the aeration and oxygenation area, the plug flow stirring area and the mud-water separation area to form a closed internal circulation system, most of mud-water mixture returns to the water inlet end after passing through the mud-water separation area, the surplus mud-water mixture is subjected to mud-water separation, the discharged water is discharged through the overflow weir, and the sludge returns to the biochemical water tank. The utility model is based on the principle of short-cut nitrification and denitrification biological denitrification, and combines the technologies of high-efficiency oxygenation, dissolved oxygen control, low-energy waste water reflux and high-efficiency sludge precipitation, so that the biological denitrification efficiency can be effectively improved, and the operation energy consumption is reduced; the utility model discloses easily realize high integration, the automation mechanized operation can improve system stability.
Description
Technical Field
The utility model belongs to the technical field of waste water treatment, specific saying so relates to a high-efficient biological denitrification system based on short-cut nitrification-denitrification technique.
Background
Wastewater treatment (wastewater treatment methods) is to treat wastewater by physical, chemical and biological methods, so that the wastewater is purified and pollution is reduced, and the wastewater is recycled and reused, and water resources are fully utilized.
The removal of ammonia nitrogen/total nitrogen is always a key difficulty in wastewater treatment, and particularly, the ammonia nitrogen/total nitrogen concentration of certain high-nitrogen wastewater, such as breeding wastewater, artificial synthetic leather industrial wastewater, high-nitrogen chemical wastewater and most pharmaceutical wastewater, is high, and the indexes of ammonia nitrogen and total nitrogen concentration are increasingly strict in environmental emission standard, so that the removal efficiency of ammonia nitrogen and total nitrogen in the wastewater treatment process is urgently needed to be improved.
The physical chemical method (adsorption, stripping, distillation, chemical oxidation, etc.) and the biological method are common methods for removing ammonia nitrogen/total nitrogen, but the physical chemical method usually has the problems of high one-time investment, high operating cost, more limit conditions, etc. to limit further popularization and application, and the conventional biological denitrification technology is generally nitrification-denitrification biological denitrification or advanced denitrification-nitrification (A/O) biological denitrification technology, but generally has the problems of low denitrification efficiency (generally 50-75%), relatively high operating cost (energy consumption, carbon source supplement, etc.), etc.
The shortcut nitrification-denitrification biological nitrogen removal technology shortens the nitrification section process (the stage of oxidizing ammonia nitrogen to nitrite is stopped), so that the biological nitrogen removal efficiency can be greatly improved, the oxygen demand of organisms in the nitrification section and the carbon source demand of the denitrification section are reduced, and researches show that the realization of shortcut nitrification-denitrification can reduce about 25 percent of oxygen demand and about 40 percent of carbon demand, thereby effectively reducing the total operation cost of biological nitrogen removal. The existing short-cut nitrification-denitrification biological denitrification device on the market generally has the problems of single function, difficulty in integration, low treatment efficiency and the like, so that the further popularization and application of the technology are influenced.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects existing in the prior art, the utility model provides a high-efficiency biological denitrification system based on the shortcut nitrification-denitrification technology, which has various functions, is easy to integrate and has high treatment efficiency.
The utility model adopts the technical proposal that:
a high-efficiency biological denitrification system based on a shortcut nitrification-denitrification technology comprises a biochemical water tank, a jet aerator, a fan, steam auxiliary heating equipment, an oxygen dissolving control unit, a temperature control unit and an acid-base control unit, wherein an aeration and oxygenation area, a plug flow stirring area and a sludge-water separation area are arranged at the inner section of the biochemical water tank at intervals; the aeration and oxygenation area is connected with a jet aerator, and the jet aerator is connected with a fan; the steam auxiliary heating equipment is arranged in the biochemical water tank, one end of the steam auxiliary heating equipment is connected with the steam inlet pipe, and the other end of the steam auxiliary heating equipment is connected with the steam condensate outlet pipe; the dissolved oxygen control unit comprises a dissolved oxygen tester and an automatic dissolved oxygen controller connected with the dissolved oxygen tester, and the dissolved oxygen tester is connected with the biochemical water tank; the temperature control unit comprises a temperature sensor and a temperature controller connected with the temperature sensor, and the temperature sensor is connected with the biochemical water tank; the acid-base control unit comprises a pH meter, and the pH meter is connected with the biochemical water tank.
Preferably, the system also comprises a carbon source supplementing unit, wherein the carbon source supplementing unit comprises carbon source adding equipment connected with the biochemical water tank; the acid-base control unit also comprises an alkali adding device, and the alkali adding device is connected with the biochemical water tank.
The utility model discloses an on-line dissolved oxygen apparatus real-time detection dissolved oxygen concentration and feedback signal to dissolved oxygen automatic control in biochemical pond, according to system setting parameter adjustment fan frequency of operation or adjustment air inlet valve opening degree change biochemical air supply volume control biochemical pond dissolved oxygen concentration at the best concentration value scope of short distance nitration denitrification. The biochemical water tank is internally provided with steam auxiliary heating equipment and a temperature control unit which automatically adjusts a steam valve according to a set temperature value to ensure that the biochemical water temperature is in an optimal temperature value range. Because the nitrification process can nitrify for a certain alkalinity, the system is provided with an alkali adding device and a pH meter to realize automatic adjustment according to the set pH value; the system is also provided with a carbon source adding device to ensure that the carbon source is sufficient in the denitrification process.
Preferably, the jet aerator, the fan, the steam auxiliary heating equipment, the dissolved oxygen control unit, the temperature control unit, the acid-base control unit and the carbon source supplement unit are respectively connected with an automatic control system.
Preferably, the automatic control system is a PLC or DCS automatic control system. All equipment and instruments adopt a PLC control system to integrate and centralize control, so that the treatment effect is high-efficient and stable.
Preferably, an air inlet valve is arranged on a connecting pipeline of the jet aerator and the fan.
Preferably, the dissolved oxygen automatic controller is respectively connected with the fan and the air inlet valve.
Preferably, the jet aerator is connected with a jet pump. The jet circulation pump and plug flow stirring are adopted to form larger horizontal flow velocity and circulating reflux ratio in the pool, so that the pollutant concentration gradient and dissolved oxygen concentration gradient at the biochemical water inlet and outlet end can be effectively reduced, and the impact resistance of the water inlet quantity and concentration change to a biochemical system is improved.
Preferably, a steam valve is arranged on the steam inlet pipe and connected with the temperature controller.
Preferably, the mud-water separation zone is provided with an inclined tube filling zone, a flow guide zone and a sludge backflow zone from top to bottom.
Compared with the prior art, the beneficial effects of the utility model reside in that:
the utility model is based on the basic principle of the short-cut nitrification and denitrification biological denitrification, and combines the high-efficiency oxygenation technology, the dissolved oxygen control technology, the low-energy waste water reflux technology and the high-efficiency sludge precipitation technology, so that the biological denitrification efficiency can be effectively improved, and the operation energy consumption can be reduced; the utility model discloses the system easily realizes high integration, and automatic operation can improve system stability.
Drawings
Fig. 1 is a schematic structural diagram of embodiment 1 of the present invention;
FIG. 2 is a schematic plan view of the biochemical pond of the present invention;
FIG. 3 is a schematic structural view of a sludge separation zone of the present invention;
fig. 4 is a schematic structural diagram of embodiment 2 of the present invention;
the figure is as follows: the device comprises a biochemical water tank 1, a jet aerator 2, a fan 3, a steam auxiliary heating device 4, an aeration and oxygenation area 5, a plug flow stirring area 6, a mud-water separation area 7, a steam inlet pipe 8, a steam condensate outlet pipe 9, a dissolved oxygen tester 10, an automatic dissolved oxygen controller 11, a temperature sensor 12, a temperature controller 13, a pH meter 14, an alkali adding device 15, a carbon source adding device 16, an air inlet valve 17, a jet pump 18, a steam valve 19, an inclined pipe filling area 20, a flow guide area 21 and a sludge recirculation area 22.
Detailed Description
The present invention will be further described with reference to the following specific examples, but the scope of the present invention is not limited thereto. Those skilled in the art can and should understand that any simple changes or substitutions based on the spirit of the present invention should fall within the protection scope of the present invention.
Example 1
Referring to fig. 1-3, a high-efficiency biological nitrogen removal system based on a shortcut nitrification-denitrification technology comprises a biochemical water tank 1, a jet aerator 2, a fan 3, a steam auxiliary heating device 4, a dissolved oxygen control unit, a temperature control unit, an acid-base control unit and a carbon source supplement unit, wherein an aeration-oxygenation area 5, a plug-flow stirring area 6 and a sludge-water separation area 7 are arranged at intervals in the biochemical water tank; the aeration and oxygenation area 5 is connected with a jet aerator 2, and the jet aerator 2 is connected with a fan 3; the steam auxiliary heating equipment 4 is arranged in the biochemical water tank 1, one end of the steam auxiliary heating equipment 4 is connected with a steam inlet pipe 8, and the other end of the steam auxiliary heating equipment 4 is connected with a steam condensate outlet pipe 9; the dissolved oxygen control unit comprises a dissolved oxygen tester 10 and an automatic dissolved oxygen controller 11 connected with the dissolved oxygen tester, and the dissolved oxygen tester 10 is connected with the biochemical water tank 1; the temperature control unit comprises a temperature sensor 12 and a temperature controller 13 connected with the temperature sensor, and the temperature sensor 12 is connected with the biochemical water tank 1; the acid-base control unit comprises a pH meter 14 and an alkali adding device 15, and the pH meter 14 and the alkali adding device 15 are connected with the biochemical water tank 1; the carbon source supplementing unit comprises a carbon source adding device 16 connected with the biochemical water tank 1.
The jet aerator, the fan, the steam auxiliary heating equipment, the dissolved oxygen control unit, the temperature control unit, the acid-base control unit and the carbon source supplement unit are respectively connected with an automatic control system, and the automatic control system is a PLC automatic control system. All equipment and instruments adopt a PLC control system to integrate and centralize control, so that the treatment effect is high-efficient and stable.
An air inlet valve 17 is arranged on a connecting pipeline of the jet aerator 2 and the fan 3, and the dissolved oxygen automatic controller 11 is respectively connected with the fan 3 and the air inlet valve 17; the jet aerator 2 is connected with a jet pump 18. The steam inlet pipe 8 is provided with a steam valve 19, and the steam valve 19 is connected with the temperature controller 13. The mud-water separation zone is provided with an inclined tube filling zone 20, a flow guide zone 21 and a sludge return zone 22 from top to bottom.
The utility model discloses a jet circulation pump + plug flow stirring can form great horizontal flow velocity and circulation backward flow ratio in the pond, can effectively reduce biochemical business turn over water end pollutant concentration gradient and dissolved oxygen concentration gradient, improves the water yield of intaking and the shock resistance of concentration variation to biochemical system.
The utility model discloses a dissolved oxygen concentration and feedback signal to PLC automatic control system in the biochemical pond of online dissolved oxygen apparatus 10 real-time detection, the dissolved oxygen concentration that changes biochemical air feed volume control biochemical pond 1 according to the system setting parameter adjustment fan 3 operating frequency or adjustment intake valve 17 opening degree nitrifies the best concentration value scope of denitrification at the short distance. The biochemical water tank 1 is internally provided with the steam auxiliary heating equipment 4 and a temperature control unit which automatically adjusts the steam valve 19 according to the set temperature value to ensure that the biochemical water temperature is in the optimal temperature value range. Because the nitrification process can realize a certain alkalinity, the system is provided with an alkali adding device 15 and a pH meter 14 to realize automatic adjustment according to the set pH value; the system is also provided with a carbon source adding device 16 to ensure that the carbon source is sufficient in the denitrification process; the utility model discloses all equipment, instrument adopt the integrated centralized control of PLC control system to ensure that the treatment effect is high-efficient stable.
When the system is used, wastewater sequentially passes through the aeration and oxygenation area 5, the plug flow stirring area 6 and the mud-water separation area 7 from the inlet end and returns to the inlet end to form a closed internal circulation system, the aeration and oxygenation area 5 adopts a high-efficiency blast pressurized jet aerator to oxygenate so as to ensure the mud-water mixing effect, the mud-water separation area 7 is provided with an inclined tube filler area 20, a diversion area 21 and a sludge backflow area 22 from top to bottom, most of mud-water mixture returns to the water inlet end after the wastewater passes through the mud-water separation area 7, the excess mud-water mixture is subjected to mud-water separation through the inclined tube filler area 20, the discharged water is discharged through an overflow weir, and the sludge returns to a biochemical pool.
Example 2
Referring to fig. 2-4, the system for efficient biological denitrification based on the shortcut nitrification-denitrification technology comprises a biochemical water tank 1, a jet aerator 2, a fan 3, a steam auxiliary heating device 4, a dissolved oxygen control unit, a temperature control unit and an acid-base control unit, wherein an aeration-oxygenation area 5, a plug-flow stirring area 6 and a sludge-water separation area 7 are arranged at intervals in the biochemical water tank; the aeration and oxygenation area 5 is connected with a jet aerator 2, and the jet aerator 2 is connected with a fan 3; the steam auxiliary heating equipment 4 is arranged in the biochemical water tank 1, one end of the steam auxiliary heating equipment 4 is connected with a steam inlet pipe 8, and the other end of the steam auxiliary heating equipment 4 is connected with a steam condensate outlet pipe 9; the dissolved oxygen control unit comprises a dissolved oxygen tester 10 and an automatic dissolved oxygen controller 11 connected with the dissolved oxygen tester, and the dissolved oxygen tester 10 is connected with the biochemical water tank 1; the temperature control unit comprises a temperature sensor 12 and a temperature controller 13 connected with the temperature sensor, and the temperature sensor 12 is connected with the biochemical water tank 1; the acid-base control unit comprises a pH meter 14, and the pH meter 14 is connected with the biochemical water tank 1.
The jet aerator, the fan, the steam auxiliary heating equipment, the dissolved oxygen control unit, the temperature control unit and the acid-base control unit are respectively connected with an automatic control system, and the automatic control system is a PLC automatic control system. All equipment and instruments adopt a PLC control system to integrate and centralize control, so that the treatment effect is high-efficient and stable.
An air inlet valve 17 is arranged on a connecting pipeline of the jet aerator 2 and the fan 3, and the dissolved oxygen automatic controller 11 is respectively connected with the fan 3 and the air inlet valve 17; the jet aerator 2 is connected with a jet pump 18. The steam inlet pipe 8 is provided with a steam valve 19, and the steam valve 19 is connected with the temperature controller 13. The mud-water separation zone is provided with an inclined tube filling zone 20, a flow guide zone 21 and a sludge return zone 22 from top to bottom.
The utility model discloses a dissolved oxygen concentration and feedback signal to PLC automatic control system in the biochemical pond of online dissolved oxygen apparatus 10 real-time detection, the dissolved oxygen concentration that changes biochemical air feed volume control biochemical pond 1 according to the system setting parameter adjustment fan 3 operating frequency or adjustment intake valve 17 opening degree nitrifies the best concentration value scope of denitrification at the short distance. The biochemical water tank 1 is internally provided with the steam auxiliary heating equipment 4 and a temperature control unit which automatically adjusts the steam valve 19 according to the set temperature value to ensure that the biochemical water temperature is in the optimal temperature value range. Because the nitrification process will nitrify a certain alkalinity, the pH meter 14 can real-time react the pH value in the biochemical pool; the utility model discloses all equipment, instrument adopt the integrated centralized control of PLC control system to ensure that the treatment effect is high-efficient stable.
Claims (9)
1. A high-efficiency biological denitrification system based on a shortcut nitrification-denitrification technology is characterized in that: the system comprises a biochemical water tank, a jet aerator, a fan, steam auxiliary heating equipment, an oxygen dissolving control unit, a temperature control unit and an acid-base control unit, wherein an aeration and oxygenation area, a plug flow stirring area and a mud-water separation area are arranged at intervals in the inner section of the biochemical water tank; the aeration and oxygenation area is connected with a jet aerator, and the jet aerator is connected with a fan; the steam auxiliary heating equipment is arranged in the biochemical water tank, one end of the steam auxiliary heating equipment is connected with the steam inlet pipe, and the other end of the steam auxiliary heating equipment is connected with the steam condensate outlet pipe; the dissolved oxygen control unit comprises a dissolved oxygen tester and an automatic dissolved oxygen controller connected with the dissolved oxygen tester, and the dissolved oxygen tester is connected with the biochemical water tank; the temperature control unit comprises a temperature sensor and a temperature controller connected with the temperature sensor, and the temperature sensor is connected with the biochemical water tank; the acid-base control unit comprises a pH meter, and the pH meter is connected with the biochemical water tank.
2. The system of claim 1, which is based on the shortcut nitrification-denitrification technology and is characterized in that: the system also comprises a carbon source supplementing unit, wherein the carbon source supplementing unit comprises carbon source adding equipment connected with the biochemical water tank; the acid-base control unit also comprises an alkali adding device, and the alkali adding device is connected with the biochemical water tank.
3. The system of claim 2, which is based on the shortcut nitrification-denitrification technology and is characterized in that: the jet aerator, the fan, the steam auxiliary heating equipment, the dissolved oxygen control unit, the temperature control unit, the acid-base control unit and the carbon source supplement unit are respectively connected with the automatic control system.
4. The system of claim 3, which is based on the shortcut nitrification-denitrification technology and is characterized in that: the automatic control system is a PLC or DCS automatic control system.
5. The high-efficiency biological nitrogen removal system based on the shortcut nitrification-denitrification technology as claimed in claim 2 or 3, wherein: an air inlet valve is arranged on a connecting pipeline of the jet aerator and the fan.
6. The system of claim 5, which is based on the shortcut nitrification-denitrification technology and is characterized in that: the dissolved oxygen automatic controller is respectively connected with the fan and the air inlet valve.
7. The high-efficiency biological nitrogen removal system based on the shortcut nitrification-denitrification technology as claimed in claim 2 or 3, wherein: the jet aerator is connected with the jet pump.
8. The high-efficiency biological nitrogen removal system based on the shortcut nitrification-denitrification technology as claimed in claim 2 or 3, wherein: the steam inlet pipe is provided with a steam valve, and the steam valve is connected with a temperature controller.
9. The high-efficiency biological nitrogen removal system based on the shortcut nitrification-denitrification technology as claimed in claim 2 or 3, wherein: the mud-water separation zone is provided with an inclined tube filling zone, a flow guide zone and a sludge return zone from top to bottom.
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| CN116199347A (en) * | 2023-04-18 | 2023-06-02 | 董金花 | Biological membrane wastewater treatment reactor and treatment method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116199347A (en) * | 2023-04-18 | 2023-06-02 | 董金花 | Biological membrane wastewater treatment reactor and treatment method |
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