CN113754049A - Biochemical pool aeration device, sewage treatment method, system and storage medium - Google Patents
Biochemical pool aeration device, sewage treatment method, system and storage medium Download PDFInfo
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- CN113754049A CN113754049A CN202111059921.1A CN202111059921A CN113754049A CN 113754049 A CN113754049 A CN 113754049A CN 202111059921 A CN202111059921 A CN 202111059921A CN 113754049 A CN113754049 A CN 113754049A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/02—Aerobic processes
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F7/00—Aeration of stretches of water
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/005—Processes using a programmable logic controller [PLC]
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
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- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
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Abstract
The invention discloses a biochemical pool aeration device, a sewage treatment method, a system and a storage medium, wherein the biochemical pool aeration device comprises: the system comprises a variable-frequency blower, a manual valve, a PLC (programmable logic controller) control device, an online dissolved oxygen meter, a microporous aeration disc and a biochemical tank; the variable-frequency blower is connected with the biochemical pool through an air duct, wherein the manual valve is arranged on the air duct; the online dissolved oxygen meter is arranged in the biochemical pool and used for measuring the oxygen content in the biochemical pool; the PLC control device is respectively connected with the variable frequency blower, the online dissolved oxygen meter and the air duct; the micropore aeration disc is arranged at the bottom of the biochemical tank and is connected with the air outlet of the air duct. The invention improves the accuracy of adjusting the aeration quantity of the biochemical tank.
Description
Technical Field
The invention relates to the field of sewage treatment, in particular to a biochemical tank aeration device, a sewage treatment method, a system and a storage medium.
Background
In the current sewage treatment field, the biological method is most widely applied, namely, microorganisms in a biological pond continuously generate specific biochemical reactions according to requirements by artificially maintaining an aerobic, anoxic or anaerobic environment so as to reduce the concentration of target pollutants, such as the concentration of pollutants in water, thereby realizing standard discharge. In the sewage dissolved oxygen treatment section, aeration tank technology is generally adopted to improve the dissolved oxygen, and a manual control aeration system is commonly used at present. Most domestic sewage treatment plants still adopt a manual control aeration system, and the manual control aeration system is a method for adjusting the air volume of an air blower every day or in a longer time period according to the data of an online dissolved oxygen meter so as to ensure that an aeration tank normally operates. However, manually adjusting the aeration rate can cause the difference of dissolved oxygen values of various biochemical systems to be large, and when the dissolved oxygen value is large, energy can be wasted, and the flocculation effect of microorganisms is poor; when the dissolved oxygen value is small, the oxygen supply of the microorganisms in the biochemical pond is insufficient, and the microorganisms grow badly. Therefore, in the prior art, the aeration amount cannot be accurately and timely controlled by manually adjusting the aeration amount so as to achieve the optimal oxygen supply condition of the microorganisms in the biochemical pond.
Disclosure of Invention
The invention mainly aims to provide an aeration device of a biochemical pool, a sewage treatment method, a sewage treatment system and a storage medium, and aims to solve the problem that the aeration quantity cannot be accurately controlled due to the fact that the aeration quantity is manually adjusted so as to achieve the optimal oxygen supply condition of microorganisms in the biochemical pool.
In order to achieve the above object, the present invention provides an aeration apparatus for biochemical tank, comprising:
the system comprises a variable-frequency blower, a manual valve, a PLC (programmable logic controller) control device, an online dissolved oxygen meter, a microporous aeration disc and a biochemical tank;
the variable-frequency blower is connected with the biochemical pool through an air duct, wherein the manual valve is arranged on the air duct;
the online dissolved oxygen meter is arranged in the biochemical pool and used for measuring the oxygen content in the biochemical pool;
the PLC control device is respectively connected with the variable frequency blower, the online dissolved oxygen meter and the air duct;
the micropore aeration plate is arranged at the bottom of the biochemical tank and is connected with the air outlet of the air duct.
Optionally, the PLC control device includes a proportional control valve and a PLC controller, wherein the proportional control valve is installed on the air duct and connected to the PLC controller, and the PLC controller is connected to the online dissolved oxygen meter.
Optionally, the PLC controller is provided with a data processing module for calculating an oxygen demand and a dissolved oxygen amount in the biochemical tank, a data calculation module for calculating an aeration amount according to the oxygen demand and the dissolved oxygen amount, and a control module for controlling the operation of the proportional control valve and the variable frequency blower.
Optionally, biochemical pond aeration systems still includes the temperature control device who sets up in biochemical pond inside, temperature control device includes temperature sensor and temperature regulation apparatus, temperature sensor and temperature regulation apparatus all set up in biochemical pond inside, temperature sensor and temperature regulation apparatus all with PLC controlling means is connected.
Optionally, a water inlet is formed in the biochemical pool, the water inlet is connected with a water inlet pipe, a filtering layer is arranged on the upper portion of the biochemical pool, and the filtering layer is used for filtering water overflowing from the biochemical pool.
In order to achieve the above object, the present invention also provides a sewage treatment method applied to the biochemical tank aeration apparatus, the sewage treatment method comprising the steps of:
collecting dissolved oxygen in a biochemical pool in real time, and determining the optimal operating frequency of the variable frequency blower according to the dissolved oxygen and a preset dissolved oxygen reference value;
and adjusting the real-time running frequency of the variable-frequency blower until the optimal running frequency is reached so that the aeration amount in the biochemical tank reaches the optimal aeration amount.
Optionally, the step of collecting the dissolved oxygen in the biochemical pool in real time and determining the optimal operating frequency of the variable frequency blower according to the dissolved oxygen and a preset dissolved oxygen reference value comprises:
collecting dissolved oxygen in a biochemical pool in real time, calculating a difference value between the dissolved oxygen and a preset dissolved oxygen reference value, and calculating an oxygen consumption absorption rate according to the dissolved oxygen;
acquiring device parameters of the microporous aeration disc, and calculating the oxygen transfer rate according to the device parameters;
and determining the optimal operating frequency of the variable frequency blower according to the difference value, the oxygen consumption absorption rate and the oxygen transfer rate.
Optionally, the step of determining an optimal operating frequency of the variable frequency blower based on the difference, the oxygen consumption absorption rate, and the oxygen transfer rate comprises:
judging the oxygen consumption absorption rate and the oxygen transfer rate and the positive and negative of the difference according to the difference, the oxygen consumption absorption rate and the oxygen transfer rate;
if the oxygen consumption absorption rate is greater than the oxygen transfer rate and the difference value is positive, determining the current operation frequency as the optimal operation frequency until the dissolved oxygen is equal to the preset dissolved oxygen reference value;
if the oxygen consumption absorptivity is greater than oxygen transfer rate and difference are the negatives, then increase current operating frequency until dissolved oxygen volume equals predetermine dissolved oxygen volume, and will dissolved oxygen volume equals operating frequency that corresponds when predetermineeing dissolved oxygen volume is as best operating frequency.
To achieve the above object, the present invention also provides a biochemical tank aeration system comprising the biochemical tank aeration apparatus described above, a memory, a processor, and a computer program stored on the memory and executable on the processor, the computer program, when executed by the processor, implementing the steps of the sewage treatment method as described above.
To achieve the above object, the present invention also provides a storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the sewage treatment method as described above.
According to the biochemical tank aeration device, the sewage treatment method, the system and the storage medium, the biochemical tank aeration device is formed by the variable frequency blower, the manual valve, the PLC control device, the online dissolved oxygen meter, the microporous aeration disc and the biochemical tank, the wastewater can be subjected to microbial treatment through the device, so that the wastewater can reach the discharge standard, and meanwhile, the microbial biochemical tank is adopted for treatment, so that the treatment method is safer and more environment-friendly; the variable-frequency blower is connected with the biochemical tank through the air duct, so that the variable-frequency blower can adjust the blowing rate to control the proper dissolved oxygen value in the biochemical tank, and the manual valve arranged on the air duct can adjust the manual valve manually when the frequency of the variable-frequency blower is not changed, so that the effect of changing the aeration rate in the biochemical tank is achieved; the oxygen content in the biochemical tank can be measured in real time through an online dissolved oxygen meter arranged in the biochemical tank, and the oxygen content is sent to the PLC control device, so that the PLC control device can adjust the aeration amount to the biochemical tank according to the real-time oxygen content; the PLC control device respectively connected with the variable-frequency blower, the online dissolved oxygen meter and the air duct can collect the oxygen content in the biochemical pool in real time, and adjust the frequency of the variable-frequency blower or adjust the air volume to the air duct according to the oxygen content to change the volume aeration rate in the biochemical pool; through installing the micropore aeration dish of biochemical pond bottom, just the aeration dish words the air outlet in wind channel is connected, can prevent that water in the biochemical pond from flowing backward the wind channel also can pass through simultaneously the aeration dish is to gas diffusion in the biochemical pond.
Drawings
FIG. 1 is a schematic diagram of a hardware operating environment according to an embodiment of the present invention;
FIG. 2 is a schematic structural view of the aeration apparatus for biochemical tanks according to the present invention;
FIG. 3 is a schematic flow chart of a sewage treatment method according to a first embodiment of the present invention;
FIG. 4 is a schematic flow chart of a sewage treatment method according to a second embodiment of the present invention;
FIG. 5 is a schematic flow chart of a sewage treatment method according to a third embodiment of the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1, fig. 1 is a schematic diagram of a hardware structure of a biochemical pool aeration system provided in various embodiments of the present invention. The biochemical pool aeration system comprises a communication module 01, a memory 02, a processor 03 and the like. Those skilled in the art will appreciate that the biochemical tank aeration system shown in fig. 1 may also include more or fewer components than shown, or combine certain components, or a different arrangement of components. The processor 03 is connected to the memory 02 and the communication module 01, respectively, and the memory 02 stores a computer program, which is executed by the processor 03 at the same time.
The communication module 01 may be connected to an external device through a network. The communication module 01 may receive data sent by an external device, and may also send data, instructions, and information to the external device, where the external device may be an electronic device such as a mobile phone, a tablet computer, a notebook computer, and a desktop computer.
The memory 02 may be used to store software programs and various data. The memory 02 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function, and the like; the storage data area may store data or information created from use of the biochemical tank aeration system, or the like. Further, the memory 02 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device.
The processor 03, which is a control center of the aeration system of the biochemical tank, connects the various parts of the aeration system of the whole biochemical tank by using various interfaces and lines, and executes various functions and processing data of the aeration system of the biochemical tank by running or executing software programs and/or modules stored in the memory 02 and calling the data stored in the memory 02, thereby performing the overall monitoring of the aeration system of the biochemical tank. Processor 03 may include one or more processing units; preferably, the processor 03 may integrate an application processor, which mainly handles operating systems, user interfaces, application programs, etc., and a modem processor, which mainly handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into the processor 03.
Referring to fig. 2, in an embodiment, the biochemical tank aeration system further comprises a biochemical tank aeration device, the biochemical tank aeration device comprising:
the system comprises a variable frequency blower 001, a manual valve 004, a PLC control device 012, an online dissolved oxygen meter 010, a microporous aeration disc 011 and a biochemical pond 003;
the variable-frequency blower 001 is connected with the biochemical pool 003 through an air duct 005, wherein the manual valve 004 is arranged on the air duct 005;
the online oxygen dissolving instrument 010 is arranged inside the biochemical pool 003 and is used for measuring the oxygen content in the biochemical pool 003;
the PLC control device 012 is respectively connected to the variable frequency blower 001, the online dissolved oxygen meter 010, and the book air duct 005;
the microporous aeration disk 011 is arranged at the bottom of the biochemical pond 003, and the microporous aeration disk 011 is connected with the air outlet of the air duct 005;
in this embodiment, the variable frequency blower 001 may adjust the blowing amount by changing the frequency, and mainly comprises the following six parts: motor, air cleaner, air-blower body, air chamber, base (also can the oil tank), oil drip mouth. The blower eccentrically operates by a rotor offset in a cylinder, and sucks, compresses, and discharges air by changing the volume between vanes in a rotor groove. During operation, the pressure difference of the blower is utilized to automatically send the lubricant to the oil dripping nozzle, and the lubricant is dripped into the cylinder to reduce friction and noise, and simultaneously the gas in the cylinder can be kept not to flow back. The manual valve 004 can be installed at any position of the air duct 005; the on-line oxygen dissolving instrument 010 is a special instrument for monitoring the oxygen content in the wastewater liquid. The on-line oxygen dissolving instrument 010 has the characteristics of quick response, stability, reliability, low use cost and the like, in the embodiment, the on-line oxygen dissolving instrument 010 has a plurality of instruments, and can be specifically arranged in different areas in the biochemical pond 003 to monitor the oxygen content in the different areas of the biochemical pond 003; the PLC control device 012 includes a PLC controller 002 and a proportional control valve 006, and the PLC control device 012 is configured to receive a dissolved oxygen value and other data measured in the biochemical tank 003 according to a preset program, calculate a required aeration amount according to the preset program, and adjust an opening degree of the proportional control valve 006 to achieve the aeration amount. The microporous aeration disk 011 is arranged at the bottom of the biochemical tank 003 in a certain density according to the topography and the aeration quantity at the bottom of the biochemical tank 003 to control the diffusion of the aeration quantity, and in the embodiment, a jet aerator can also be adopted. The biochemical pool 003 is used for storing wastewater, and various microorganisms exist in the biochemical pool 003, so that the wastewater can be treated to reach the discharge standard.
According to the biochemical tank 003 aeration device provided by the invention, the biochemical tank 003 aeration device is formed by the variable-frequency blower 001, the manual valve 004, the PLC control device 012, the online dissolved oxygen meter 010, the microporous aeration disc 011 and the biochemical tank 003, wastewater can be subjected to microbial treatment by the device, so that the wastewater can reach the discharge standard, and meanwhile, the microbial biochemical tank 003 is adopted for treatment, so that the treatment method is safer and more environment-friendly; the variable-frequency blower 001 is connected with the biochemical tank 003 through the air duct 005, so that the variable-frequency blower 001 can adjust the blowing amount to control the proper dissolved oxygen value in the biochemical tank 003, and the manual valve 004 arranged on the air duct 005 can manually adjust the manual valve 004 when the frequency of the variable-frequency blower 001 is not changed, so that the effect of changing the aeration amount in the biochemical tank 003 is achieved; the oxygen content in the biochemical tank 003 can be measured in real time by the online dissolved oxygen meter 010 arranged in the biochemical tank 003 and is sent to the PLC control device 012, so that the PLC control device 012 can adjust the aeration quantity to the biochemical tank 003 according to the real-time oxygen content; the PLC control device 012 respectively connected with the variable frequency blower 001, the online dissolved oxygen meter 010 and the air duct 005 can collect the oxygen content in the biochemical pool 003 in real time, and adjust the frequency of the variable frequency blower 001 or adjust the air volume to the air duct 005 according to the oxygen content to change the aeration volume in the biochemical pool 003; through installing the micropore aeration dish 011 of biochemical pond 003 bottom, just the aeration dish words the air outlet of wind channel 005 is connected, can prevent that water among the biochemical pond 003 from flowing backward wind channel 005 also can pass through simultaneously the aeration dish is to gas diffusion in the biochemical pond 003.
Further, the PLC control device 012 includes a proportional control valve 006 and a PLC controller 002, in which the proportional control valve 006 is installed on the air duct 005 and connected with the PLC controller 002, and the PLC controller 002 is connected with the online dissolved oxygen meter 010;
in this embodiment, the proportional control valve 006 is installed on the air duct 005, specifically, on the side of the air duct 005 near the biochemical pool 003; PLC controller 002 still includes power supply module, microprocessor and memory module and output input module, power supply module provides power supply for PLC controller 002, microprocessor and memory module provide data calculation and processing function for PLC controller 002, the input output module provides functions such as data output and data input for PLC controller 002.
In this embodiment, the PLC controller 002 can receive the measurement data of the online dissolved oxygen meter 010, and obtain the appropriate oxygen content in the biochemical tank 003 through internal calculation, and control the proportional control valve 006 to adjust the aeration amount according to the appropriate oxygen content, so as to improve the control accuracy of the aeration apparatus of the biochemical tank 003, and prevent the situations of insufficient aeration amount and excessive aeration amount.
Further, the PLC controller 002 is provided with a data processing module 007 for calculating oxygen demand and dissolved oxygen in the biochemical pond 003, a data calculating module 008 for calculating aeration amount according to the oxygen demand and the dissolved oxygen, and a control module 009 for controlling the operation of the proportional control valve 006 and the variable frequency blower 001;
in this embodiment, the oxygen demand and the dissolved oxygen amount refer to the amount of oxygen required and the dissolved amount of oxygen in water when the microorganisms in the biochemical pool 003 reach the optimal activation point, wherein, the dissolved oxygen amount can be measured in real time according to the online dissolved oxygen meter 010, the oxygen demand can acquire the number and the type of the microorganisms in the biochemical pool 003 first, then calculate the oxygen demand in the biochemical pool 003 according to the number and the type of the microorganisms, and more specifically, can set up the collection device in the biochemical pool 003 in advance, gather the water quality sample and acquire the analysis of the water quality sample and obtain the type and the number of the microorganisms in the biochemical pool 003, and the oxygen demand is manually input into the PLC controller 002 to realize the calculation of the oxygen demand. In the present invention, the work flow of the PLC controller 002 is that, first, the data processing module 007 obtains the dissolved oxygen amount in the water and the preset oxygen demand according to the online dissolved oxygen meter 010, then calculates the aeration amount of the variable frequency blower 001 according to the oxygen demand and the dissolved oxygen amount, and finally controls the adjustment frequency of the variable frequency blower 001 according to the aeration amount to output the calculated aeration amount, or adjusts the aeration amount to achieve the calculated aeration amount by changing the opening degree of the proportional control valve 006.
In this embodiment, by providing the data processing module 007 for calculating oxygen demand and dissolved oxygen in the biochemical pond 003, the data calculation module 008 for calculating aeration amount according to the oxygen demand and the dissolved oxygen, and the control module 009 for controlling the proportional control valve 006 and the variable frequency blower 001 to operate, accurate control of the appropriate aeration amount of the biochemical pond 003 is ensured, manual operation is avoided, and the possibility of errors is reduced.
Further, biochemical pond 003 aeration systems still includes the temperature control device 003 that sets up in biochemical pond 003, temperature control device 003 includes temperature sensor 013 and temperature regulation device 014, temperature sensor 013 and temperature regulation device 014 all set up inside biochemical pond 003, temperature sensor 013 and temperature regulation device 014 all with PLC controlling means 012 is connected, temperature sensor 013 is arranged in gathering biochemical pond 003 real-time temperature, and will the temperature transmits for PLC controlling means 012, so that PLC controlling means 012 according to the temperature value with predetermine the best dissolved oxygen value control temperature regulation device 014 carries out intensification or cooling operation.
In this embodiment, since the fusion rate of oxygen and water is affected by the temperature, the dissolved oxygen rate can be controlled by adjusting the temperature to reach the predetermined dissolved oxygen amount as soon as possible. Meanwhile, as the growth environment of the microorganisms is also influenced by the temperature, the optimal temperature for the survival of the microorganisms can be reached by adjusting the temperature.
In another embodiment, a stirring device is arranged on the side wall of the biochemical pool, the stirring device comprises a driving motor, a plurality of blades and a base for installing the blades, and the driving motor is respectively connected with the PLC and the base and is used for receiving instructions of the PLC and driving the blades to work;
in this embodiment, the stirring device is used to accelerate the dissolution of oxygen, the stirring device may also be arranged at the bottom of the biochemical pool, and the like, or a plurality of stirring devices may be arranged at the bottom and the side wall of the biochemical pool, respectively. And when receiving a command of the PLC, driving the motor to drive the blades to stir, and accelerating the dissolution of oxygen. In addition, a waterproof compartment can be arranged in the biochemical pool and used for placing the driving motor, so that the phenomenon that the stirring device cannot work normally due to the fact that the driving motor is exposed in water is avoided;
in this embodiment, through setting up agitating unit can be when biochemical pond dissolved oxygen volume is not enough for the dissolution of oxygen and water for biochemical pond's treatment effeciency reaches the highest.
Furthermore, a water inlet is formed in the biochemical pool 003 and connected with a water inlet pipe, and a filtering layer is arranged on the upper portion of the biochemical pool 003 and used for filtering water overflowing from the biochemical pool 003.
In this embodiment, biochemical pond 003 is the concave structure, and waste water accessible inlet tube gets into biochemical pond 003, after waste water treatment accomplished, the accessible overflow is discharged, and is concrete, can spill over in biochemical pond 003 upper portion, and the upper portion is provided with the filtering layer, but the filtering layer filters the most microorganism of the aquatic that need discharge, prevents that the microorganism from running off in a large number, causes biochemical pond 003 treatment capacity to reduce.
It will be understood by those skilled in the art that the biochemical tank aeration apparatus configuration shown in fig. 1 does not constitute a limitation on the performance of the biochemical tank aeration apparatus, and may include more or fewer components than shown, or some components in combination, or a different arrangement of components.
Various embodiments of the method of the present invention are presented in terms of the above-described hardware architecture.
Referring to fig. 3, in a first embodiment of the sewage treatment method of the present invention, the sewage treatment method includes the steps of:
step S10, collecting the dissolved oxygen in the biochemical pond in real time, and determining the optimal operating frequency of the variable frequency blower according to the dissolved oxygen and a preset dissolved oxygen reference value;
in this embodiment, the dissolved oxygen amount refers to a dissolved amount of oxygen in water, and can be measured by an online dissolved oxygen meter, the preset dissolved oxygen reference value refers to a dissolved oxygen amount required when microorganisms in a biochemical pond reach an optimal activity, and the preset dissolved oxygen reference value can be measured in advance by a worker and input into a PLC controller, so that the PLC controller adjusts a variable frequency blower to work according to the preset dissolved oxygen amount; the optimal operation frequency of the variable frequency blower refers to the frequency corresponding to the optimal aeration rate calculated according to the dissolved oxygen amount and the preset reference value, and at the frequency, the variable frequency blower can output the aeration rate corresponding to the preset reference value.
Step S20, acquiring the real-time running frequency of the variable frequency blower, and adjusting the variable frequency blower according to the real-time running frequency and the optimal running frequency so as to enable the aeration amount in the biochemical tank to reach the optimal aeration amount.
In the implementation, the aeration quantity of the variable frequency blower can be changed by changing the operating frequency of the variable frequency blower, and when the operating frequency of the variable frequency blower reaches the optimal operating frequency, the aeration quantity can also reach the optimal value, so that the aeration quantity in the biochemical tank can reach the optimal value; in addition, when the frequency of the variable frequency blower is constant, the aeration quantity can be changed by adjusting the proportion adjusting valve.
In this embodiment, the dissolved oxygen in the biochemical pond is collected in real time, the optimal operating frequency of the variable frequency blower is determined according to the dissolved oxygen and a preset dissolved oxygen reference value, and the real-time operating frequency of the variable frequency blower is adjusted until the optimal operating frequency is reached, so that the aeration amount in the biochemical pond reaches the optimal aeration amount. The optimal operation frequency is calculated, the biochemical pool can operate according to the optimal operation frequency, the microorganisms in the biochemical pool are kept in the optimal state, the treatment efficiency of the biochemical pool is the highest, and the full utilization of resources is ensured.
Further, referring to fig. 4, in the sewage treatment method according to the present invention proposed based on the first embodiment of the present invention, the present invention proposes the second embodiment, and the step S10 includes:
step S11, collecting the dissolved oxygen in the biochemical pond in real time, calculating the difference between the dissolved oxygen and the preset dissolved oxygen reference value, and calculating the oxygen consumption absorption rate according to the dissolved oxygen;
step S12, acquiring device parameters of the microporous aeration disc, and calculating the oxygen transfer rate according to the device parameters;
in this embodiment, the calculation formula of the difference value is: the difference value is dissolved oxygen-preset dissolved oxygen reference value; the oxygen consumption absorption rate refers to the rate of oxygen consumption in the water body, namely the rate of oxygen consumption by microorganisms, specifically, the real-time dissolved oxygen amount in a period of time can be collected by an online dissolved oxygen meter, the real-time dissolved oxygen amount is input into a PLC (programmable logic controller), the PLC is controlled to calculate the oxygen consumption absorption rate, and it needs to be noted that under the condition that other conditions are not changed, the higher the oxygen consumption absorption rate is, the lower the concentration of dissolved oxygen in the water body is; the oxygen transfer rate refers to the percentage of oxygen amount transferred from air to the oxygen-free clear water through the microporous aeration disc to the total oxygen supply amount under a certain condition, specifically, the oxygen transfer rate can be calculated according to the device parameters of the microporous aeration disc, and it needs to be noted that under the condition that other conditions are not changed, the higher the oxygen transfer rate is, the higher the dissolved oxygen concentration in the water body is.
Step S13, determining the optimal operating frequency of the variable frequency blower according to the difference, the oxygen consumption absorption rate and the oxygen transfer rate;
in this embodiment, specifically, the magnitudes of the oxygen consumption absorption rate and the oxygen transfer rate and the positive and negative of the difference can be determined according to the difference, the oxygen consumption absorption rate and the oxygen transfer rate; the difference, the oxygen consumption absorption rate and the oxygen transfer rate, and the magnitudes of the oxygen consumption absorption rate and the oxygen transfer rate and the positive and negative of the difference may be calculated by a preset program in the PLC controller.
According to the invention, the oxygen content in the biochemical pond is collected in real time, the difference value between the dissolved oxygen amount and the preset dissolved oxygen amount reference value of the fox search is calculated, the oxygen consumption absorption rate is calculated according to the dissolved oxygen amount, the device parameter of the microporous aeration disc is obtained, and the absorption rate and the output rate of the oxygen content in the biochemical pond are accurately measured according to the device parameter, so that the treatment efficiency of the biochemical pond can be more accurately controlled, and the maximum working efficiency can be reached when the biochemical pond works.
Further, referring to fig. 5, in the sewage treatment method according to the present invention proposed based on the first embodiment of the present invention, the present invention proposes a third embodiment, and the step S20 includes:
step S21, acquiring the real-time running frequency of the variable-frequency blower, and judging the magnitude relation between the real-time running frequency and the optimal running frequency;
step S22, if the real-time running frequency is larger than the optimal running frequency, reducing the real-time running frequency of the variable frequency blower until the variable frequency blower reaches the optimal running frequency;
step S23, if the real-time running frequency is less than the optimal running frequency, increasing the real-time running frequency of the variable frequency blower until the variable frequency blower reaches the optimal running frequency;
in this embodiment, the magnitude of the oxygen consumption absorption rate and the oxygen transfer rate and the positive and negative of the difference can be determined according to the difference, the oxygen consumption absorption rate and the oxygen transfer rate, and then the optimal operating frequency can be determined according to the magnitude of the oxygen consumption absorption rate and the oxygen transfer rate and the positive and negative of the difference; when the adjustment of the variable frequency blower is carried out, the adjustment can be divided into a plurality of conditions, specifically as follows:
first, the oxygen absorption rate is greater than the oxygen transfer rate and the difference is positive; specifically, when the oxygen absorption rate is greater than the oxygen transfer rate, that is, the oxygen consumption in the biochemical pond is greater than the oxygen production; if the difference value is positive, the dissolved oxygen is larger than the preset dissolved oxygen reference value, namely, if the oxygen content in the water is larger than the preset oxygen content, the dissolved oxygen in the water needs to be reduced to the preset dissolved oxygen reference value, if the oxygen absorption rate is larger than the oxygen transfer rate, the size between the actual dissolved oxygen and the preset dissolved oxygen needs to be judged again when the oxygen absorption rate is equal to the oxygen transfer rate, and then the real-time operating frequency of the variable frequency blower is adjusted according to the size between the actual dissolved oxygen and the preset dissolved oxygen to reach the optimal operating frequency;
second, if the oxygen absorption rate is greater than the oxygen transfer rate and the difference is negative; specifically, when the oxygen absorption rate is greater than the oxygen transfer rate, that is, the oxygen consumption in the biochemical pond is greater than the oxygen production; if the difference value is negative, the dissolved oxygen amount is smaller than the preset dissolved oxygen amount reference value, namely, if the oxygen content in the water is smaller than the preset oxygen content, the dissolved oxygen amount in the water needs to be increased to the preset dissolved oxygen amount reference value, if the oxygen absorption rate is larger than the oxygen transfer rate, the size between the actual dissolved oxygen amount and the preset dissolved oxygen amount is judged again when the oxygen absorption rate is equal to the oxygen transfer rate, and then the real-time operation frequency of the variable frequency blower is adjusted according to the size between the actual dissolved oxygen amount and the preset dissolved oxygen amount to achieve the optimal operation frequency;
third, if the oxygen absorption rate is less than the oxygen transfer rate and the difference is negative. Specifically, when the oxygen absorption rate is less than the oxygen transfer rate, that is, the oxygen consumption in the biochemical pond is less than the oxygen production; if the difference value is positive, the dissolved oxygen is larger than the preset dissolved oxygen reference value, namely, if the oxygen content in the water is larger than the preset oxygen content, the dissolved oxygen in the water needs to be reduced to the preset dissolved oxygen reference value, if the oxygen absorption rate is smaller than the oxygen transfer rate, the size between the oxygen absorption rate and the oxygen transfer rate is judged again when the dissolved oxygen in the water is equal to the preset dissolved oxygen reference value, and then the real-time operation frequency of the variable frequency blower is adjusted according to the size between the oxygen absorption rate and the oxygen transfer rate, so that the dissolved oxygen is always equal to the preset dissolved oxygen reference value, and the optimal operation frequency is reached;
fourth, if the oxygen absorption rate is less than the oxygen transfer rate and the difference is negative; specifically, when the oxygen absorption rate is less than the oxygen transfer rate, that is, the oxygen consumption in the biochemical pond is less than the oxygen production; the difference is the burden, then indicates that dissolved oxygen is less than predetermine dissolved oxygen benchmark value, that is to say, aquatic oxygen content is less than predetermineeing oxygen content, then indicates that the dissolved oxygen of aquatic improves to predetermineeing dissolved oxygen benchmark value, because the oxygen absorptivity is less than the oxygen transfer rate, then wait for when the dissolved oxygen of aquatic equals to predetermineeing dissolved oxygen benchmark value, judge the size between oxygen absorptivity and the oxygen transfer rate again, again according to the size regulation between oxygen absorptivity and the oxygen transfer rate the real-time operating frequency of frequency conversion air-blower to make dissolved oxygen equal to predetermineeing dissolved oxygen benchmark value all the time, reach best operating frequency.
According to the invention, the variable frequency blower is adjusted through the size relation between the actual operating frequency and the optimal operating frequency of the variable frequency blower, so that the dissolved oxygen reaches the preset dissolved oxygen reference value, the automatic adjustment of the dissolved oxygen of the biochemical pond is realized, the manual operation is avoided, and the adjustment accuracy is higher.
The invention also proposes a storage medium on which a computer program is stored. The storage medium may be the Memory 02 in the unmanned logistics vehicle of fig. 1, and may also be at least one of a ROM (Read-Only Memory)/RAM (Random Access Memory), a magnetic disk, and an optical disk, where the storage medium includes several pieces of information for enabling the unmanned logistics vehicle to perform the method according to the embodiments of the present invention.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A biochemical pond aeration apparatus, characterized in that, biochemical pond aeration apparatus includes:
the system comprises a variable-frequency blower, a manual valve, a PLC (programmable logic controller) control device, an online dissolved oxygen meter, a microporous aeration disc and a biochemical tank;
the variable-frequency blower is connected with the biochemical pool through an air duct, wherein the manual valve is arranged on the air duct;
the online dissolved oxygen meter is arranged in the biochemical pool and used for measuring the oxygen content in the biochemical pool;
the PLC control device is respectively connected with the variable frequency blower, the online dissolved oxygen meter and the air duct;
the micropore aeration disc is arranged at the bottom of the biochemical tank and is connected with the air outlet of the air duct.
2. The biochemical pool aeration device according to claim 1, wherein the PLC control device comprises a proportional control valve and a PLC controller, wherein the proportional control valve is installed on the air duct and connected to the PLC controller, and the PLC controller is connected to the online dissolved oxygen meter.
3. The biochemical pond aeration device according to claim 2, wherein the PLC controller is provided with a data processing module for calculating an oxygen demand and a dissolved oxygen amount in the biochemical pond, a data calculating module for calculating an aeration amount based on the oxygen demand and the dissolved oxygen amount, and a control module for controlling the operation of the proportional control valve and the variable frequency blower.
4. The biochemical tank aeration device according to claim 2, wherein the biochemical tank aeration system further comprises a temperature control device disposed inside the biochemical tank, the temperature control device comprises a temperature sensor and a temperature adjustment device, the temperature sensor and the temperature adjustment device are both disposed inside the biochemical tank, and the temperature sensor and the temperature adjustment device are both connected to the PLC control device.
5. The biochemical tank aeration device according to claim 1, wherein the biochemical tank is provided with a water inlet connected to a water inlet pipe, and the upper part of the biochemical tank is provided with a filter layer for filtering water overflowing from the biochemical tank.
6. A sewage treatment method, characterized in that the sewage treatment method is applied to the aeration device of the biochemical tank, and the sewage treatment method comprises the following steps:
collecting dissolved oxygen in a biochemical pool in real time, and determining the optimal operating frequency of the variable frequency blower according to the dissolved oxygen and a preset dissolved oxygen reference value;
and acquiring the real-time running frequency of the variable-frequency blower, and adjusting the variable-frequency blower according to the real-time running frequency and the optimal running frequency so as to enable the aeration amount in the biochemical tank to reach the optimal aeration amount.
7. The sewage treatment method of claim 6, wherein the step of collecting the dissolved oxygen in the biochemical pond in real time and determining the optimal operating frequency of the variable frequency blower according to the dissolved oxygen and a preset dissolved oxygen reference value comprises the following steps:
collecting dissolved oxygen in a biochemical pool in real time, calculating a difference value between the dissolved oxygen and a preset dissolved oxygen reference value, and calculating an oxygen consumption absorption rate according to the dissolved oxygen;
acquiring device parameters of the microporous aeration disc, and calculating the oxygen transfer rate according to the device parameters;
and determining the optimal operating frequency of the variable frequency blower according to the difference value, the oxygen consumption absorption rate and the oxygen transfer rate.
8. The wastewater treatment method of claim 7, wherein the step of obtaining a real-time operating frequency of the variable frequency blower and adjusting the variable frequency blower based on the real-time operating frequency and an optimal operating frequency comprises:
acquiring the real-time running frequency of the variable-frequency blower, and judging the magnitude relation between the real-time running frequency and the optimal running frequency;
if the real-time running frequency is greater than the optimal running frequency, reducing the real-time running frequency of the variable-frequency blower until the variable-frequency blower reaches the optimal running frequency;
and if the real-time running frequency is less than the optimal running frequency, increasing the real-time running frequency of the variable-frequency blower until the variable-frequency blower reaches the optimal running frequency.
9. A biochemical tank aeration system, comprising the biochemical tank aeration apparatus according to any one of claims 1 to 5, a memory, a processor, and a computer program stored on the memory and executable on the processor, the computer program when executed by the processor implementing the steps of the wastewater treatment method according to any one of claims 6 to 8.
10. A storage medium, characterized in that the storage medium has stored thereon a computer program which, when being executed by a processor, carries out the steps of the sewage treatment method according to any one of claims 6 to 8.
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