CN213569713U - Can realize that nitrogen gas is automatic to be thrown denitrification nitrogen removal system of throwing control - Google Patents
Can realize that nitrogen gas is automatic to be thrown denitrification nitrogen removal system of throwing control Download PDFInfo
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- CN213569713U CN213569713U CN202021803103.9U CN202021803103U CN213569713U CN 213569713 U CN213569713 U CN 213569713U CN 202021803103 U CN202021803103 U CN 202021803103U CN 213569713 U CN213569713 U CN 213569713U
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Abstract
The utility model relates to a denitrification system capable of realizing nitrogen automatic feeding control, which belongs to the technical field of sewage treatment and comprises an ozone oxidation unit, a nitrogen blow-off unit and a denitrification unit which are arranged along the water flow direction in sequence, wherein the ozone oxidation unit can degrade pollutants in sewage, the nitrogen blow-off unit can reduce the dissolved oxygen amount in the sewage after the treatment of the ozone oxidation unit, and the denitrification unit can carry out denitrification treatment on the sewage; the automatic nitrogen feeding subsystem adjusts the flow of nitrogen supplied to the nitrogen stripping unit according to the water inlet flow and the dissolved oxygen amount of outlet water of the nitrogen stripping unit, so that the dissolved oxygen amount in the sewage, which is output by the nitrogen stripping unit, entering the denitrification unit, forms an anoxic environment suitable for growth and reproduction of denitrifying microorganisms and denitrification work, and the denitrification unit can perform efficient sewage denitrification treatment.
Description
Technical Field
The utility model relates to a sewage treatment's technical field especially relates to a can realize that nitrogen gas is automatic to be thrown denitrification system of throwing control.
Background
A denitrification system is a common sewage treatment system, which can perform denitrification treatment on sewage.
The prior art provides a denitrification system, which comprises an ozone oxidation tank and a denitrification tank which are sequentially arranged along the water flow direction. Wherein, the strong oxidizing property that the ozone oxidation pond can utilize ozone degrades the pollutant in to the sewage, the denitrification pond can utilize biological nitrogen removal method to handle sewage, for reducing the microorganism in the surplus ozone destruction denitrification pond in the sewage, firstly, throw in the volume through the ozone of control ozone oxidation pond, reduce the surplus ozone volume in the ozone oxidation pond output sewage, secondly, set up the ozonolysis district between ozone oxidation pond and denitrification pond, decompose the surplus ozone in the ozone oxidation pond output sewage.
The dissolved oxygen in the sewage can be increased after the ozone is decomposed, if the dissolved oxygen in the sewage injected into the denitrification tank is too high to form an aerobic environment, a large amount of carbon sources can be consumed to form a dominant aerobic strain population, the growth of denitrifying bacteria in the denitrification tank is not facilitated, and the denitrification efficiency is greatly reduced; if the dissolved oxygen amount of the sewage injected into the denitrification tank is too low to form an anaerobic environment, the growth and the propagation of denitrifying bacteria in the denitrification tank are not facilitated, and the microbial biomass cannot meet the requirement of high-efficiency denitrification efficiency. Therefore, the dissolved oxygen in water is generally removed by stirring, standing, adding a medicament sodium thiosulfate and the like.
The above prior art has the following technical drawbacks: the mode process of getting rid of aquatic dissolved oxygen through modes such as stirring, parking, throwing medicaments is slow, and the effect is poor, and is inefficient, and is consuming time long, has also reduced the efficiency of sewage denitrogenation work, consequently needs increase the pond volume, and reinforcing denitrogenation ability leads to area's waste.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a can realize that nitrogen gas is automatic to be thrown the denitrification system of throwing control, its advantage lies in its efficiency that can improve sewage denitrogenation work.
The above utility model discloses an above-mentioned utility model purpose can realize through following technical scheme:
a denitrification system capable of realizing automatic nitrogen adding control comprises an ozone oxidation unit, a nitrogen stripping unit and a denitrification unit which are sequentially arranged along the water flow direction, and further comprises an automatic nitrogen adding subsystem for adding nitrogen into the nitrogen stripping unit;
the automatic nitrogen dosing subsystem comprises:
the water inlet flow acquisition module is used for acquiring water inlet flow information, and the water inlet flow information reflects the water inlet flow of the nitrogen stripping unit;
the dissolved oxygen amount acquisition module is used for acquiring dissolved oxygen amount information, and the dissolved oxygen amount information reflects the dissolved oxygen amount of the effluent of the nitrogen stripping unit;
the nitrogen stripping supply module is connected with the nitrogen stripping unit and used for supplying nitrogen to the nitrogen stripping unit;
and the integrated control module is connected with the water inflow acquisition module, the dissolved oxygen acquisition module and the stripping nitrogen supply module, and outputs nitrogen flow adjustment information according to the water inflow information and the dissolved oxygen information, wherein the nitrogen flow adjustment information enables the stripping nitrogen supply module to change the flow of nitrogen supplied by the nitrogen stripping unit.
By adopting the technical scheme, the ozone oxidation unit can degrade pollutants in sewage by utilizing the strong oxidizing property of ozone, the nitrogen stripping unit can reduce the dissolved oxygen amount in the sewage treated by the ozone oxidation unit, the denitrification unit can carry out denitrification treatment on the sewage, the automatic nitrogen feeding subsystem adjusts the flow rate of supplying nitrogen into the nitrogen stripping unit according to the water inlet flow rate and the water outlet dissolved oxygen amount of the nitrogen stripping unit, so that the sewage output by the nitrogen stripping unit, namely the dissolved oxygen amount in the sewage entering the denitrification unit, forms an anoxic environment suitable for growth and reproduction and denitrification work of denitrifying microorganisms, the dissolved oxygen removal efficiency in the sewage is higher by adopting the nitrogen stripping mode, and the automatic nitrogen feeding subsystem automatically controls the flow rate of feeding nitrogen to the nitrogen stripping unit to be faster and more accurate, so that the anoxic environment required by the denitrifying microorganisms can be more accurately and more quickly formed in the denitrification unit, so that the denitrification unit can carry out high-efficiency sewage denitrification treatment.
Furthermore, the inflow water flow acquisition module comprises one or more inflow water flow meters, one or more inflow water flow meters are arranged at the water inlets of the nitrogen stripping unit and/or the ozone oxidation unit, and one or more inflow water flow meters are connected with the integrated control module.
Through adopting above-mentioned technical scheme, adopt the flowmeter of intaking to gather the inflow flow of nitrogen gas blow off unit, simple and convenient, the technology is mature, and is comparatively accurate.
Further, dissolved oxygen volume collection module includes one or more dissolved oxygen volume detection device, one or more dissolved oxygen volume detection device set up in nitrogen gas blows off unit and denitrification denitrogenation unit junction, and one or more dissolved oxygen volume detection device connects the integrated control module.
Through adopting above-mentioned technical scheme, dissolved oxygen volume detection device can blow off the dissolved oxygen volume in the sewage of unit output to nitrogen gas and detect, detects the dissolved oxygen volume in the sewage of pouring into the denitrification unit promptly to integrated control module adjusts the nitrogen gas flow of pouring into the nitrogen gas blow off unit according to the dissolved oxygen volume of actually pouring into the sewage of denitrification unit, makes the dissolved oxygen volume in the denitrification unit obtain more accurate control.
Further, the dissolved oxygen amount detection device is an online DO meter.
By adopting the technical scheme, the dissolved oxygen amount of the effluent of the nitrogen stripping unit is collected by adopting the online DO meter, so that the method is simple and convenient, and the technology is mature and relatively accurate.
Further, the nitrogen purge supply module includes:
the nitrogen storage device is connected with the nitrogen stripping unit and is used for storing the nitrogen supplied to the nitrogen stripping unit;
the flow adjusting device is arranged at the joint of the nitrogen storage device and the nitrogen stripping unit and is used for adjusting the flow of the nitrogen supplied to the nitrogen stripping unit by the nitrogen storage device;
the flow adjusting device is connected with the integrated control module, and the nitrogen flow adjusting information enables the flow adjusting device to adjust the flow of the nitrogen supplied to the nitrogen stripping unit by the nitrogen storage device.
Through adopting above-mentioned technical scheme, nitrogen gas that nitrogen gas storage device can store and blow off the unit supply to nitrogen gas, and the flow adjustment device who sets up between nitrogen gas storage device and nitrogen gas blow off the unit can adjust the flow that supplies nitrogen gas to nitrogen gas storage device to nitrogen gas blow off the unit, and integrated control module can control flow adjustment device to the control is thrown the flow of throwing nitrogen gas in the unit to nitrogen gas blow off.
Further, the flow rate adjustment means includes an electromagnetic adjustment valve, and the nitrogen gas flow rate adjustment information changes an opening degree of the electromagnetic adjustment valve.
Through adopting above-mentioned technical scheme, adopt electromagnetic control valve to throw the flow of throwing nitrogen gas in nitrogen gas storage device to the nitrogen gas stripping unit, simple structure, the technology is mature, and installation setting and control are all more convenient.
Further, the automatic nitrogen dosing subsystem further comprises:
the air inlet flow acquisition module is used for acquiring air inlet flow information, and the air inlet flow information reflects the nitrogen inlet flow of the nitrogen stripping unit;
the air inflow collecting module is connected with the integrated control module, and the nitrogen flow adjusting information is changed according to the air inflow information.
Through adopting above-mentioned technical scheme, the flow of nitrogen gas can be gathered actually to nitrogen gas blow-off unit injection nitrogen gas to the inflow collection module, integrated control module is according to the flow control nitrogen gas flow adjustment information of actually injecting nitrogen gas into nitrogen gas blow-off unit, and then the flow that nitrogen gas was supplied with to nitrogen gas blow-off unit to the control nitrogen gas supply unit, this kind is according to the actual flow of injecting nitrogen gas into nitrogen gas blow-off unit to come the mode that controls the flow of injecting nitrogen gas into nitrogen gas blow-off unit to make nitrogen gas blow-off unit throw the volume and can obtain more accurate control.
Further, the intake flow acquisition module comprises one or more gas flow meters, the one or more gas flow meters are arranged at the connection position of the nitrogen stripping unit and the stripping nitrogen supply module, and the one or more gas flow meters are connected with the integrated control module.
Through adopting above-mentioned technical scheme, the adoption sets up in nitrogen gas blows off the unit and blows off the gas flowmeter that nitrogen gas supplied module junction to blow off nitrogen gas and supply module and actually supply with the flow of nitrogen gas to nitrogen gas blow off unit and gather, and the installation sets up simple and conveniently, and the technology is mature, and the cost is lower, and the acquisition result is comparatively accurate.
Further, the denitrification system capable of realizing the automatic nitrogen adding control further comprises:
the sewage backflow subsystem is connected with the integrated control module and is used for enabling the nitrogen stripping unit to realize sewage self-circulation;
and when the dissolved oxygen in the sewage output by the nitrogen stripping unit is greater than the preset value of the dissolved oxygen, the sewage backflow subsystem enables the sewage of the nitrogen stripping unit to self-circulate.
Through adopting above-mentioned technical scheme, the setting of sewage backward flow subsystem can make the sewage self-loopa of nitrogen gas blow-off unit when the dissolved oxygen volume in the sewage of nitrogen gas blow-off unit output is too big, and the repetition blows off the dissolved oxygen in the sewage, avoids the too big sewage of dissolved oxygen volume to pour into the oxygen deficiency environment of denitrification denitrogenation unit, influence denitrification denitrogenation unit.
Further, the sewage return subsystem includes:
two ends of the electric control three-way valve are respectively communicated and connected with the water outlet of the nitrogen stripping unit and the water inlet of the denitrification unit, and the other end of the electric control three-way valve is communicated and connected with the water inlet of the nitrogen stripping unit;
the circulating power device is arranged at the communication position of the electric control three-way valve and the water inlet of the nitrogen stripping unit and is used for providing water flow power from the electric control three-way valve to the water inlet of the nitrogen stripping unit;
the electric control three-way valve and the circulating power device are connected with the integrated control module; under a normal state, the electric control three-way valve is respectively communicated with the end parts of the nitrogen stripping unit and the denitrification unit which are respectively communicated; when the dissolved oxygen in the sewage output by the nitrogen stripping unit is greater than the preset value of the dissolved oxygen, the electric control three-way valve is respectively communicated with the end parts of the nitrogen stripping unit and the denitrification unit.
Through adopting above-mentioned technical scheme, adopt the automatically controlled three-way valve that receives the integrated control module control to select the delivery port and the denitrification unit intercommunication of nitrogen gas blow-off unit or through the water inlet intercommunication of circulation power device and nitrogen gas blow-off unit, when dissolved oxygen volume is greater than the dissolved oxygen volume default in the sewage of nitrogen gas blow-off unit output, make nitrogen gas blow-off unit not with denitrification unit intercommunication and sewage self-loopa, the repeated dissolved oxygen of carrying out blows-off work, moreover, the steam generator is simple in structure, it is all more convenient to set up and control, and the cost is lower.
To sum up, the utility model discloses a following at least one useful technological effect:
1. the utility model provides a denitrification denitrogenation system that can realize nitrogen gas automatic feeding control, it blows off the processing to the oxygen in the sewage through the nitrogen gas blow-off unit that sets up between ozone oxidation unit and denitrification denitrogenation unit, can control the dissolved oxygen volume in the sewage that pours into denitrification denitrogenation unit, so that the dissolved oxygen volume in the sewage that pours into denitrification denitrogenation unit satisfies the oxygen deficiency environment of microorganism growth and reproduction and denitrogenation work, in order to satisfy the needs of high-efficient denitrogenation, and the automatic nitrogen feeding subsystem controls the flow of nitrogen gas feeding to the nitrogen gas blow-off unit according to the water inlet volume information of nitrogen gas blow-off unit and the dissolved oxygen volume information of nitrogen gas blow-off unit outlet water, control is comparatively accurate;
2. the nitrogen flow of the nitrogen gas blown off unit injected into the nitrogen gas supply module actually is collected through the gas inlet flow collecting module arranged between the nitrogen gas blown off unit and the nitrogen gas blown off unit, and the nitrogen gas flow of the nitrogen gas blown off unit injected into the nitrogen gas supply module is controlled according to the collected actual nitrogen gas flow, so that the nitrogen gas flow injected into the nitrogen gas blown off unit is more accurate.
3. By accurately controlling the addition of nitrogen, the sewage entering the denitrification unit is ensured to form an anoxic environment in the denitrification unit, so that denitrifying strains are dominant species, the waste of carbon sources is avoided, and the utilization rate of the carbon sources is improved.
4. Through the arrangement, the original denitrification efficiency can be improved by more than 2 times, and the occupied area of the process unit can be saved.
Drawings
Fig. 1 is a schematic structural diagram of an example of the present invention.
In the figure, 1, an ozone oxidation unit; 2. a nitrogen stripping unit; 3. a denitrification unit; 4. an automatic nitrogen dosing subsystem; 41. a nitrogen stripping supply module; 411. a nitrogen storage device; 412. a flow rate adjusting device; 42. a water inflow collecting module; 43. a dissolved oxygen amount acquisition module; 44. an integrated control module; 45. an intake flow acquisition module; 5. a sewage backflow subsystem; 51. an electrically controlled three-way valve; 52. a circulating power device.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1, a denitrification system capable of realizing automatic nitrogen feeding control comprises an ozone oxidation unit 1, a nitrogen stripping unit 2 and a denitrification unit 3 which are sequentially arranged along a water flow direction. Ozone oxidation unit 1 utilizes the strong oxidizing property of ozone to degrade the pollutant in the sewage, nitrogen blows off unit 2 and utilizes the dissolved oxygen of nitrogen in to the sewage to blow off and handle, with the dissolved oxygen volume that reduces in the sewage, denitrification unit 3 utilizes the denitrifying microorganism to carry out the denitrogenation processing to sewage, nitrogen flow control through control to nitrogen blowing off unit 2 is thrown pours into dissolved oxygen volume in the sewage of denitrification unit 3 into, form in the denitrification unit 3 and satisfy the equal comparatively efficient oxygen deficiency environment of denitrifying microorganism growth reproduction and denitrogenation work, thereby improve sewage treatment's denitrification nitrogen removal efficiency.
The ozone oxidation unit 1 may be an ozone oxidation tank, an ozone oxidation tower, or the like capable of performing an ozone oxidation work, and may be an ozone oxidation tank in an example. The water outlet of the ozone oxidation pond is connected with the water inlet of the ozone decomposition pond, the sewage output by the ozone oxidation pond is injected into the ozone decomposition pond, and the ozone decomposition pond decomposes the residual ozone in the sewage output by the ozone oxidation pond so as to reduce the possibility that the residual ozone in the sewage destroys the denitrifying microorganisms in the denitrifying denitrification unit 3.
The nitrogen gas blows and takes off unit 2 can blow off the pond for nitrogen gas in the example, and it adopts nitrogen gas, utilizes and blows off the principle, gets rid of the dissolved oxygen in the sewage gradually, and the delivery port in ozonolysis pond is connected to the water inlet in nitrogen gas blows off the pond, and the higher sewage of dissolved oxygen volume of ozonolysis pond output pours into nitrogen gas and blows off the pond, and nitrogen gas blows off the pond and utilizes nitrogen gas to remove the dissolved oxygen in the sewage gradually to reduce the dissolved oxygen volume in the sewage.
The denitrification unit 3 may be any type of device capable of performing denitrification, such as a denitrification tank, an MBBR tank, or the like, and in the example, may be a denitrification tank provided with denitrification microorganisms, and the denitrification unit performs treatment of nitrate nitrogen in the sewage by the denitrification microorganisms to gradually remove the nitrate nitrogen in the sewage, thereby completing denitrification treatment of the sewage.
Other structures added in the ozone oxidation unit 1 and the denitrification unit 3, such as an ozone adding structure of the ozone oxidation unit 1, a carbon source adding structure of the denitrification unit 3, a stirrer and the like, are all conventional arrangement modes of a person skilled in the art, and do not belong to main components of the technical scheme, so detailed description is not provided herein.
This denitrification system still including automatic throw nitrogen subsystem 4 of throwing nitrogen gas to nitrogen gas blow off unit 2 automatically, blow off unit 2 with comparatively accurate flow to nitrogen gas through automatic throw nitrogen subsystem 4 and throw nitrogen gas in throwing nitrogen gas blow off unit 2 to make the comparatively accurate formation of dissolved oxygen volume in the unit 2 output sewage of nitrogen gas blow off satisfy the oxygen deficiency environment of the high-efficient denitrogenation work of denitrifying microorganism, realized more efficient sewage denitrogenation work with comparatively simple and convenient swift mode.
The automatic nitrogen feeding subsystem 4 comprises a nitrogen stripping gas supply module 41, a water inflow acquisition module 42, a dissolved oxygen acquisition module 43 and an integrated control module 44. Wherein, the nitrogen gas supply module 41 that blows off is used for blowing off the unit 2 to nitrogen gas and supplies nitrogen gas, water inflow collection module 42 is used for gathering the inflow flow information that reflects the inflow flow of nitrogen gas blowing off unit 2, dissolved oxygen volume collection module 43 is used for gathering the dissolved oxygen volume information that reflects the dissolved oxygen volume of nitrogen gas blowing off unit 2 play water, nitrogen gas flow control module is according to inflow flow information and dissolved oxygen volume information output nitrogen gas flow adjustment information, in order to control the flow that the nitrogen gas supply module 41 supplies nitrogen gas to nitrogen gas blowing off unit 2 to the nitrogen gas of blowing off.
The purged nitrogen gas supply module 41 includes a nitrogen gas storage device 411 and a flow rate adjusting device 412. The nitrogen storage device 411 is used for storing nitrogen, and an air outlet of the nitrogen storage device 411 is connected with the nitrogen stripping unit 2 through an air supply pipeline so as to supply nitrogen to the nitrogen stripping unit 2 and perform the work of stripping dissolved oxygen by using nitrogen; the flow rate adjusting device 412 is connected between the nitrogen gas storage device 411 and the nitrogen gas stripping unit 2, and is generally installed in the gas supply line for adjusting the flow rate of nitrogen gas supplied from the nitrogen gas storage device 411 to the nitrogen gas stripping unit 2.
In one example, the nitrogen storage device 411 is configured as a nitrogen storage tank, an air outlet of the nitrogen storage tank is connected to the nitrogen stripping tank through an air supply line, and the flow adjusting device 412 is an electromagnetic adjusting valve communicatively disposed between the air supply line and the air outlet of the nitrogen storage tank. High-pressure nitrogen is stored in the nitrogen storage tank, and the flow of nitrogen output by the nitrogen storage tank can be controlled by controlling the opening of the electromagnetic regulating valve, namely the flow of nitrogen injected into the nitrogen stripping tank is controlled.
The inflow water flow rate collection module 42 includes one or more inflow water flow meters, and the one or more inflow water flow meters are disposed at the water inlet of the nitrogen stripping unit 2, and since the sewage of the nitrogen stripping unit 2 is completely supplied by the sewage output by the ozone oxidation unit 1, the flow rate of the sewage injected into the ozone oxidation unit 1 is the same as the flow rate of the sewage injected into the nitrogen stripping unit 2, and thus the one or more inflow water flow meters can be disposed at the water inlet of the ozone oxidation unit 1 as well.
In one example, the inflow collection module 42 includes an inflow flowmeter, which is disposed at the water inlet of the ozonation cell and is used for collecting the flow of wastewater injected into the ozonation cell, i.e. the inflow information directly reflects the flow of wastewater injected into the ozonation cell, and certainly reflects the flow of wastewater injected into the nitrogen stripping cell.
The dissolved oxygen amount acquisition module 43 comprises one or more dissolved oxygen amount detection devices, which may be an online DO meter, and the one or more online DO meters are disposed at the connection between the nitrogen stripping unit 2 and the denitrification unit 3. The online DO analyzer is a dissolved oxygen online analyzer, which can collect the dissolved oxygen amount in the sewage delivered to the denitrification unit 3 by the nitrogen stripping unit 2, i.e. the dissolved oxygen amount information output by the dissolved oxygen amount collection module 43 reflects the dissolved oxygen amount in the sewage actually injected into the denitrification unit 3.
In one example, the dissolved oxygen collecting module 43 includes an online DO meter, which is disposed at the water outlet of the nitrogen stripping tank and is used for collecting the dissolved oxygen in the sewage output by the nitrogen stripping tank, that is, the dissolved oxygen information directly reflects the dissolved oxygen in the sewage output by the nitrogen stripping tank, and certainly reflects the dissolved oxygen in the sewage injected into the denitrification tank.
The integrated control module 44 is connected to the inflow flow rate acquisition module 42, the dissolved oxygen amount acquisition module 43, and the nitrogen stripping gas supply module 41, and outputs nitrogen flow rate adjustment information according to inflow flow rate information and dissolved oxygen amount information, where the nitrogen flow rate adjustment information is information indicating that the nitrogen stripping gas supply module 41 changes the flow rate of nitrogen supplied to the nitrogen stripping unit 2.
In one example, the integrated control module 44 is a PLC controller, the PLC controller is connected to the inflow flowmeter, the online DO meter and the electromagnetic control valve, the opening of the electromagnetic control valve is controlled according to the inflow information to change the flow of nitrogen injected from the nitrogen storage tank to the nitrogen stripping tank, and the ratio of the gas to the water of nitrogen to sewage is generally 0.1: 1-5: 1, the actual ratio can be adjusted according to the comprehensive consideration of the actual cost and the stripping efficiency, and the flow ratio of nitrogen to sewage can be 0.5: 1, judging whether the dissolved oxygen content in the sewage reflected by the dissolved oxygen content information is in an oxygen-poor content range, wherein the oxygen-poor content range is 0.2-0.5 mg/L, and the sub-range of the range can be 0.3-0.4 mg/L, if the dissolved oxygen content in the sewage reflected by the dissolved oxygen content information is higher than 0.4mg/L, increasing the opening of an electromagnetic regulating valve by a PLC (programmable logic controller), so as to increase the flow of nitrogen injected into a nitrogen stripping tank by a nitrogen storage tank, so as to reduce the dissolved oxygen content in the sewage output by the nitrogen stripping tank, and if the dissolved oxygen content in the sewage reflected by the dissolved oxygen content information is lower than 0.3mg/L, reducing the opening of the electromagnetic regulating valve by the PLC, so as to reduce the flow of nitrogen injected into the nitrogen stripping tank by the nitrogen storage tank, so as to increase the dissolved oxygen content in the sewage output by the nitrogen stripping tank, and increasing or reducing the opening ratio of the electromagnetic regulating valve by the PLC Set No. here, with an initial nitrogen to wastewater ratio of 0.5: by way of example, the result of increasing the opening of the electromagnetic regulating valve is that the ratio of nitrogen to sewage is 0.6: the opening of the electromagnetic regulating valve is 1, namely, the nitrogen gas with 0.1 unit flow rate is increased, and the nitrogen gas with 0.1 unit flow rate is reduced.
Further, the automatic nitrogen feeding subsystem 4 further comprises an inlet flow rate acquisition module 45, the inlet flow rate acquisition module 45 is connected to acquire inlet flow rate information reflecting the actual nitrogen flow injected into the nitrogen stripping unit 2, the inlet flow rate acquisition module 45 is further connected to the integrated control module 44, and the nitrogen flow rate adjustment information changes according to the inlet flow rate information.
The intake flow rate collection module 45 includes one or more gas flow meters which are connected between the nitrogen stripping unit 2 and the stripped nitrogen supply module 41, and the one or more gas flow meters are connected to the integrated control module 44.
In one example, the intake flow collecting module 45 includes a gas flow meter, which is disposed at a connection between the electromagnetic control valve and the nitrogen stripping tank, specifically, between the electromagnetic control valve and the air supply pipeline; this gas flowmeter still connects the PLC controller, the PLC controller adjusts the solenoid pilot valve aperture according to the air intake flow information that gas flowmeter gathered, make solenoid pilot valve's aperture satisfy actual nitrogen gas supply flow needs, should be for 1m year/s if calculate required nitrogen gas supply flow, and the nitrogen gas flow that air intake flow information reflects is 0.8m year/s, then increase solenoid pilot valve aperture proportion, make actual nitrogen gas supply flow 0.8m year/s adjust to calculate required nitrogen gas supply flow 1m year/s, in order to improve the accuracy that nitrogen gas supplied flow, thereby make the dissolved oxygen volume in the nitrogen gas stripping pond output sewage obtain comparatively accurate control.
Preferably, the denitrification system further comprises a sewage backflow subsystem 5, the sewage backflow subsystem 5 comprises an electric control three-way valve 51 and a circulating power device 52, the electric control three-way valve 51 is provided with two ends communicated with each other and arranged between the nitrogen stripping unit 2 and the denitrification unit, the electric control three-way valve 51 is positioned behind the dissolved oxygen collection module 43 along the water flow direction, the other end of the electric control three-way valve 51 is communicated with the water inlet of the nitrogen stripping unit 2 through the circulating power device 52, and the circulating power device 52 provides water flow power for the sewage from the electric control three-way valve 51 to the water inlet of the nitrogen stripping unit 2.
The electric control three-way valve 51 is connected with the integrated control module 44, and under a normal state, the electric control three-way valve 51 is communicated with two communicated ends of the nitrogen stripping unit 2 and the denitrification unit 3 respectively, so that the sewage output by the nitrogen stripping unit 2 can be injected into the denitrification unit 3, when the dissolved oxygen amount reflected by the dissolved oxygen amount information acquired by the dissolved oxygen amount acquisition module 43 is too large and the nitrogen supply flow is increased only by the nitrogen stripping supply module 41, the nitrogen supply requirement still cannot be met, the integrated control module 44 controls the electric control three-way valve 51 to be communicated with the ends of the nitrogen stripping unit 2 and the circulating power device 52 respectively, so that the sewage of the nitrogen stripping unit 2 is self-circulated and continuously subjected to dissolved oxygen elimination, so as to reduce the amount of the sewage containing excessive dissolved oxygen and to inject the sewage into the denitrification unit 3 to influence the anoxic environment in the denitrification unit 3.
The circulation power device 52 may be a circulation pump in an example.
The implementation principle of the embodiment is as follows: ozone oxidation unit 1 utilizes the strong oxidizing property of ozone to degrade the pollutant in the sewage, nitrogen blows off unit 2 and utilizes the dissolved oxygen in the sewage of nitrogen to ozone oxidation unit 1 output to blow off, denitrification unit 3 utilizes the denitrifying microorganism to denitrify sewage, throw the nitrogen flow that nitrogen subsystem 4 was thrown to nitrogen in the nitrogen blowing off unit 2 according to the dissolved oxygen volume information control of nitrogen blowing off unit 2's the inflow information of unit 2 and nitrogen blowing off unit 2 play water to throw in nitrogen blowing off unit 2 automatically, thereby make dissolved oxygen volume satisfy denitrifying microorganism high efficiency growth reproduction in the sewage of nitrogen blowing off unit 2 output in the denitrifying denitrification unit 3, the oxygen deficiency environment of high-efficient denitrogenation work, in order to carry out comparatively high-efficient sewage denitrogenation work.
The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.
Claims (10)
1. A denitrification system capable of realizing automatic nitrogen adding control is characterized by comprising an ozone oxidation unit (1), a nitrogen stripping unit (2) and a denitrification unit (3) which are sequentially arranged along the water flow direction, and further comprising an automatic nitrogen feeding subsystem (4) for adding nitrogen into the nitrogen stripping unit (2);
the automatic nitrogen dosing subsystem (4) comprises:
the water inlet flow acquisition module (42) is used for acquiring water inlet flow information, and the water inlet flow information reflects the water inlet flow of the nitrogen stripping unit (2);
the dissolved oxygen amount acquisition module (43) is used for acquiring dissolved oxygen amount information, and the dissolved oxygen amount information reflects the dissolved oxygen amount of the water outlet of the nitrogen stripping unit (2);
the nitrogen stripping supply module (41) is connected with the nitrogen stripping unit (2) and is used for supplying nitrogen to the nitrogen stripping unit (2);
and the integrated control module (44) is connected with the water inlet flow acquisition module (42), the dissolved oxygen amount acquisition module (43) and the nitrogen stripping supply module (41), and outputs nitrogen flow adjustment information according to the water inlet flow information and the dissolved oxygen amount information, wherein the nitrogen flow adjustment information enables the nitrogen stripping supply module (41) to change the flow of the nitrogen supplied to the nitrogen stripping unit (2).
2. The denitrification system capable of realizing automatic nitrogen adding control according to claim 1, wherein the water inflow collection module (42) comprises one or more water inflow meters, the one or more water inflow meters are arranged at the water inlets of the nitrogen stripping unit (2) and/or the ozone oxidation unit (1), and the one or more water inflow meters are connected with the integrated control module (44).
3. The denitrification system capable of realizing the automatic nitrogen adding control according to claim 1, wherein the dissolved oxygen collection module (43) comprises one or more dissolved oxygen detection devices, one or more dissolved oxygen detection devices are arranged at the joint of the nitrogen stripping unit (2) and the denitrification unit (3), and one or more dissolved oxygen detection devices are connected with the integrated control module (44).
4. The denitrification system capable of realizing automatic nitrogen adding control according to claim 3, wherein the dissolved oxygen amount detection device is an online DO meter.
5. The denitrification system capable of realizing automatic nitrogen adding control according to claim 4, wherein the blown-off nitrogen supply module (41) comprises a nitrogen storage device (411) and a flow adjusting device (412);
a nitrogen gas storage device (411) connected to the nitrogen gas stripping unit (2) and used for storing the nitrogen gas supplied to the nitrogen gas stripping unit (2);
the flow adjusting device (412) is arranged at the joint of the nitrogen storage device and the nitrogen stripping unit (2) and is used for adjusting the flow of the nitrogen supplied to the nitrogen stripping unit (2) by the nitrogen storage device (411);
the flow rate adjusting device (412) is connected to the integrated control module (44), and the nitrogen flow rate adjusting information enables the flow rate adjusting device (412) to adjust the flow rate of the nitrogen supplied to the nitrogen stripping unit (2) by the nitrogen storage device (411).
6. The denitrification system capable of realizing automatic nitrogen adding control according to claim 5, wherein the flow regulating device (412) comprises an electromagnetic regulating valve.
7. The denitrification system capable of realizing automatic nitrogen adding control according to claim 1, wherein the automatic nitrogen adding subsystem (4) further comprises:
the air inlet flow acquisition module (45) is used for acquiring air inlet flow information, and the air inlet flow information reflects the nitrogen inlet flow of the nitrogen stripping unit (2);
the air inlet flow acquisition module (45) is connected with the integrated control module (44), and the nitrogen flow adjustment information is changed according to the air inlet flow information.
8. The denitrification system capable of realizing automatic nitrogen adding control according to claim 7, wherein the intake flow collecting module (45) comprises one or more gas flow meters, the one or more gas flow meters are arranged at the connection part of the nitrogen stripping unit (2) and the stripping nitrogen supply module (41), and the one or more gas flow meters are connected with the integrated control module (44).
9. The denitrification system capable of realizing automatic nitrogen adding control according to claim 1, further comprising:
the sewage backflow subsystem (5) is connected with the integrated control module (44) and is used for enabling the nitrogen stripping unit (2) to realize sewage self-circulation;
when the dissolved oxygen in the sewage output by the nitrogen stripping unit (2) is larger than the preset value of the dissolved oxygen, the sewage backflow subsystem (5) enables the sewage of the nitrogen stripping unit (2) to self-circulate.
10. The denitrification system capable of realizing automatic nitrogen adding control according to claim 9, wherein the sewage backflow subsystem (5) comprises:
two ends of the electric control three-way valve (51) are respectively communicated and connected with the water outlet of the nitrogen stripping unit (2) and the water inlet of the denitrification unit (3), and the other end of the electric control three-way valve is communicated and connected with the water inlet of the nitrogen stripping unit (2);
the circulating power device (52) is arranged at the communication position of the electric control three-way valve (51) and the water inlet of the nitrogen stripping unit (2) and is used for providing water flow power from the electric control three-way valve (51) to the water inlet of the nitrogen stripping unit (2);
the electric control three-way valve (51) and the circulating power device (52) are connected with the integrated control module (44); under a normal state, the electric control three-way valve (51) is respectively communicated with the ends of the nitrogen stripping unit (2) and the denitrification unit (3); when the dissolved oxygen in the sewage output by the nitrogen stripping unit (2) is larger than the preset value of the dissolved oxygen, the electric control three-way valve (51) is respectively communicated with the end parts of the nitrogen stripping unit (2) and the denitrification unit (3).
Priority Applications (1)
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113697946A (en) * | 2021-08-12 | 2021-11-26 | 北京工业大学 | Device and method for quickly starting shortcut denitrification coupling anaerobic ammonia oxidation through aeration stripping |
| CN113697947A (en) * | 2021-08-16 | 2021-11-26 | 北京工业大学 | Method and device for regulating and controlling denitrification degree and process of DEAMOX system based on pH |
| CN117361738A (en) * | 2023-09-22 | 2024-01-09 | 太通建设有限公司 | Risk control and denitrification method and system for dissolved oxygen in sewage |
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2020
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113697946A (en) * | 2021-08-12 | 2021-11-26 | 北京工业大学 | Device and method for quickly starting shortcut denitrification coupling anaerobic ammonia oxidation through aeration stripping |
| CN113697947A (en) * | 2021-08-16 | 2021-11-26 | 北京工业大学 | Method and device for regulating and controlling denitrification degree and process of DEAMOX system based on pH |
| CN117361738A (en) * | 2023-09-22 | 2024-01-09 | 太通建设有限公司 | Risk control and denitrification method and system for dissolved oxygen in sewage |
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