A method and system for measuring the oxygenation performance of an aerator

Abstract

The application provides a method and system for measuring oxygenation performance of an aerator, and belongs to the technical field of measurement of oxygenation performance of an aerator, and aims to solve the problem that the measured oxygenation capacity of the aerator is difficult to reflect the oxygenation capacity of the aerator in actual water treatment work, and in the method and system, the oxygenation capacity parameter of the aerator can be calculated by using the adding rate of a first oxygen scavenger when the dissolved oxygen concentration is kept at a preset concentration threshold, so that the measured oxygenation capacity parameter of the aerator is more consistent with the condition that the dissolved oxygen concentration is kept stable in actual water treatment tasks, and thus the measured oxygenation capacity parameter of the aerator can more accurately reflect the oxygenation capacity of the aerator in the process of actual execution of water treatment tasks, so that the oxygenation rate of the aerator can be more accurately controlled.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of measuring the oxygenation performance of aerators, and in particular to a method and system for measuring the oxygenation performance of aerators. BACKGROUND

[0002] An aerator is a device for aerating water to increase the oxygen content in the water. Aerators have important applications in the field of water treatment, and are generally used for aerobic microbial treatment of wastewater to be treated. According to statistics, aerators account for 45% to 75% of the operating costs of a water treatment system. In the water treatment process, the oxygenation rate of the aerator is generally controlled according to the amount of dissolved oxygen required in the treatment process, so as to make the oxygen supply rate of the aerator to the wastewater to be treated sufficient to meet the demand for dissolved oxygen in the treatment process.

[0003] The indicators related to the oxygenation performance include the oxygen transfer rate, the oxygenation capacity and the overall oxygen transfer coefficient. Accurate measurement of the oxygenation performance is beneficial to accurate control of the oxygenation rate of the aerator during operation. In a method for measuring the oxygenation performance of an aerator, an excess amount of an oxygen scavenger is added to the sample water in the reactor under the starting state of the aerator, and a dissolved oxygen meter is used to continuously detect the dissolved oxygen concentration in the sample water in the reactor, and the process of the dissolved oxygen concentration in the sample water changing from zero to saturation is recorded. The average change rate of the dissolved oxygen concentration in the process of the dissolved oxygen concentration in the sample water changing from zero to saturation is used to calculate the oxygenation capacity of the aerator.

[0004] The oxygenation capacity of the aerator measured by the above method reflects the average oxygenation capacity of the aerator, and it is difficult to accurately reflect the oxygenation capacity of the aerator during actual operation. SUMMARY

[0005] The present application provides a method and system for measuring the oxygenation performance of an aerator, which is beneficial to more accurate measurement of the oxygenation performance of the aerator, so as to more accurately control the oxygenation rate of the aerator during actual operation.

[0006] In a first aspect, the present application provides a method for measuring the oxygenation performance of an aerator. The method comprises:

[0007] controlling the starting of an aerator to be measured, the aerator being in a reactor for aerating and oxygenating sample water in the reactor;

[0008] adding a first oxygen scavenger to the sample water in the reactor, and controlling the addition rate of the first oxygen scavenger;

[0009] collecting the dissolved oxygen concentration in the sample water;

[0010] After the dissolved oxygen concentration is maintained within the preset concentration threshold for a preset time, the oxygenation capacity parameter of the aerator corresponding to the preset concentration threshold is calculated according to the addition rate of the oxygen scavenger.

[0011] By adopting the technical scheme, the oxygenation capacity parameter of the aerator can be calculated by using the addition rate of the first oxygen scavenger when the dissolved oxygen concentration is maintained within the preset concentration threshold, so that the measured oxygenation capacity parameter of the aerator is more in line with the condition of maintaining the dissolved oxygen concentration in the actual water treatment task, and thus the measured oxygenation capacity parameter of the aerator more accurately reflects the oxygenation capacity of the aerator in the actual execution of the water treatment task, so as to more accurately control the oxygenation rate of the aerator.

[0012] Further, the preset concentration threshold has one or more.

[0013] Further, the method further comprises:

[0014] The reactor comprises a first chamber, a second chamber and a third chamber, the first chamber is communicated with the second chamber, the first chamber and the second chamber are communicated to the same communication structure, the communication structure is communicated with the third chamber, the first chamber, the second chamber and the third chamber all contain the sample water, the aerator is arranged in the sample water in the first chamber, the first oxygen scavenger is added to the sample water in the second chamber, and the dissolved oxygen concentration is measured from the sample water in the third chamber.

[0015] Further, the method further comprises:

[0016] Based on the historical measurement record big data, a oxygenation capacity prediction model is trained, the oxygenation capacity prediction model comprises an input layer, multiple hidden layers and an output layer;

[0017] The historical measurement record big data comprises multiple historical measurement record data, each historical measurement record data comprises measurement conditions of an aerator, gas supply conditions of the aerator and a measurement result of an oxygenation capacity parameter, the measurement conditions comprise temperature data of sample water, air pressure data of an environment where the sample water is located, salinity data of the sample water, depth data at the aerator, and one or more of preset concentration thresholds that are stably maintained at the time of measurement, the gas supply conditions comprise gas supply pressure data and gas supply flow data, and the measurement result of the oxygenation capacity parameter comprises an oxygenation capacity value and an oxygen transfer coefficient;

[0018] The oxygenation capacity prediction model is used to input measurement conditions of a to-be-measured aerator and gas supply conditions of the aerator, so as to output an expected result of the oxygenation capacity parameter.

[0019] The oxygenation capacity prediction model trains model parameters under the condition of reducing the deviation degree between the expected result and the measurement result.

[0020] Further, the method further comprises:

[0021] adding a second oxygen scavenger to the sample water in the reactor before the aerator is started, so that the dissolved oxygen concentration is lower than a preset concentration threshold; the purity of the second oxygen scavenger is lower than that of the first oxygen scavenger.

[0022] In a second aspect, the present application provides a system for measuring the oxygenation performance of an aerator. The system comprises a reactor, an oxygen scavenger adding module, a dissolved oxygen monitoring module and a control module;

[0023] The reactor contains sample water, and the aerator to be measured is arranged in the reactor for aerating and oxygenating the sample water.

[0024] The oxygen scavenger adding module is used to add a first oxygen scavenger to the sample water in the reactor, and the addition rate of the first oxygen scavenger is controllable.

[0025] The dissolved oxygen monitoring module is used to monitor the dissolved oxygen concentration in the sample water.

[0026] The control module is connected to the aerator, the oxygen scavenger adding module and the dissolved oxygen monitoring module, and is used to control the start of the aerator, the addition rate of the first oxygen scavenger and the acquisition of the dissolved oxygen concentration; after the dissolved oxygen concentration is maintained within a preset concentration threshold for a preset time, the control module calculates the oxygenation capacity parameter of the aerator corresponding to the preset concentration threshold according to the addition rate of the oxygen scavenger.

[0027] Further, the dissolved oxygen monitoring module comprises a dissolved oxygen meter, a flow-through tank, a circulating pump, a circulating valve and a water inlet valve, the water inlet of the circulating pump is connected to a water source and the reactor respectively, the circulating valve is connected to a node where the water inlet of the circulating pump is connected to the reactor, the water inlet valve is connected to a node where the circulating pump is connected to the water source, the water outlet of the circulating pump is connected to one end of the flow-through tank, the other end of the flow-through tank is connected to the reactor, and the probe of the dissolved oxygen meter is arranged in the flow-through tank for acquiring the dissolved oxygen concentration.

[0028] The control module is connected to the dissolved oxygen meter, the circulating pump, the circulating valve and the water inlet valve to acquire the dissolved oxygen concentration, and is used to control the start and stop of the circulating pump, and the opening and closing of the circulating valve and the water inlet valve.

[0029] Further, the oxygen scavenger adding module comprises a first storage bin, a second storage bin, a first dosing valve, a second dosing valve and a dosing pump.

[0030] The first storage bin is used for containing the first oxygen scavenger, the second storage bin is used for containing the second oxygen scavenger, the water inlet of the dosing pump is connected with the first storage bin and the second storage bin respectively, the first dosing valve is arranged at the node where the water inlet of the dosing pump is connected with the first storage bin, the second dosing valve is arranged at the node where the water inlet of the dosing pump is connected with the second storage bin, and the water outlet of the dosing pump is connected with the reactor, the purity of the second oxygen scavenger is lower than that of the first oxygen scavenger.

[0031] The control module is connected with the dosing pump, the first dosing valve and the second dosing valve, and is used for controlling the pumping speed of the dosing pump, and controlling the opening and closing of the first dosing valve and the second dosing valve; before the aerator is started, the control module controls the dosing pump to be opened, the first dosing valve to be closed and the second dosing valve to be opened, so as to control the addition of the second oxygen scavenger in the sample water in the reactor, so that the dissolved oxygen concentration is lower than the preset concentration threshold.

[0032] Further, an air pressure monitoring module is further included, the air pressure monitoring module includes an exhaust pipeline, an air pressure gauge and an exhaust valve;

[0033] The reactor is sealed, one end of the exhaust pipeline is connected with the top of the reactor, and the other end is connected with the atmosphere, the exhaust valve is arranged in the exhaust pipeline, and the air pressure gauge is arranged in the exhaust pipeline between the reactor and the exhaust valve, and the opening degree of the exhaust valve is controllable.

[0034] The control module is connected with the air pressure gauge and the exhaust valve, and is used for receiving the first air pressure data collected by the air pressure gauge, and controlling the opening degree of the exhaust valve.

[0035] Further, a gas supply module is further included, the gas supply module includes a blower, an air inlet valve, a gas supply pressure gauge and a gas flow meter, the air outlet of the blower is connected with the air inlet of the aerator, the air inlet valve is arranged between the air outlet of the blower and the air inlet of the aerator, and the gas supply pressure gauge and the gas flow meter are arranged between the air inlet valve and the air inlet of the aerator.

[0036] The control module is connected with the blower, the air inlet valve, the gas supply pressure gauge and the gas flow meter, and is used for controlling the blowing power of the blower, controlling the opening and closing of the air inlet valve, and collecting the gas supply pressure collected by the gas supply pressure gauge and the gas supply flow collected by the gas flow meter.

[0037] Further, the reactor comprises a first chamber, a second chamber and a third chamber, the first chamber is communicated with the second chamber, the first chamber and the second chamber are communicated to the same communication structure, the communication structure is communicated with the third chamber, the first chamber, the second chamber and the third chamber all contain the sample water, the aerator is arranged in the sample water in the first chamber, the first oxygen consumption agent is added in the sample water in the second chamber, and the dissolved oxygen concentration is measured from the sample water in the third chamber.

[0038] Further, the system further comprises a temperature detection module and a depth detection module, the temperature detection module is used for detecting first temperature data of the sample water in the reactor, the depth detection module is used for detecting first water depth data at the aerator, and the control module is connected with the temperature detection module and the depth detection module to obtain the first temperature data and the first water depth data.

[0039] The control module is further configured to:

[0040] Based on the historical measurement record big data, an oxygenation capacity prediction model is trained, the oxygenation capacity prediction model comprises an input layer, multiple hidden layers and an output layer;

[0041] The historical measurement record big data comprises multiple historical measurement record data, each historical measurement record data comprises measurement conditions of the aerator, gas supply conditions of the aerator and measurement results of oxygenation capacity parameters, the measurement conditions comprise one or more of temperature data of the sample water, air pressure data of an environment where the sample water is located, salinity data of the sample water, depth data at the aerator and a preset concentration threshold value that is stably kept at the time of measurement, the gas supply conditions comprise gas supply pressure data and gas supply flow data, and the measurement results of the oxygenation capacity parameters comprise an oxygenation capacity value and an oxygen transfer coefficient;

[0042] The oxygenation capacity prediction model is used for inputting measurement conditions of a to-be-measured aerator and gas supply conditions of the aerator to output expected results of oxygenation capacity parameters.

[0043] The oxygenation capacity prediction model trains model parameters in a condition of reducing a deviation degree between the expected results and the measurement results.

[0044] In summary, the present application specifically comprises the following beneficial effects:

[0045] 1. A method and system for measuring oxygenation performance of an aerator are provided, which consume dissolved oxygen generated in sample water by an oxygen consumption agent of the aerator, so that the dissolved oxygen concentration in the sample water is kept at a preset concentration threshold value, which is beneficial to making the measured oxygenation capacity parameters of the aerator more reflect the oxygenation capacity in the actual working process, thereby being beneficial to more accurately controlling the aerator in the actual water treatment work.

[0046] 2. The use of a second oxygen scavenger with lower purity to eliminate the initial dissolved oxygen in the sample water, and the use of a first oxygen scavenger with higher purity to titrate and achieve oxygen balance with the aerator, which is conducive to cost savings;

[0047] 3. The reactor is divided into three chambers, so that the aeration and oxygenation of the aerator, the titration of the first oxygen scavenger, and the measurement of the dissolved oxygen concentration are carried out in separate chambers, which can avoid the inaccuracy of the dissolved oxygen concentration measurement caused by the reaction between the first oxygen scavenger and the bubbles that are not dissolved or floated in time during the aeration and oxygenation process of the aerator, and can also avoid the inaccuracy of the dissolved oxygen concentration measurement caused by the insufficient reaction between the oxygen scavenger and the dissolved oxygen.

[0048] It should be understood that the content described in the summary section is not intended to limit the key or important features of the embodiments of the present application, nor to limit the scope of the present application. Other features of the present application will become apparent from the following description. BRIEF DESCRIPTION OF DRAWINGS

[0049] The above and other features, advantages, and aspects of embodiments of the present application will become more apparent by describing in detail the following embodiments with reference to the attached drawings. In the drawings, the same or similar reference numerals refer to the same or similar elements, and:

[0050] Figure 1 A schematic diagram of a system for measuring the oxygenation performance of an aerator in embodiments of the present application is shown.

[0051] Figure 2 A cross-sectional schematic diagram of the division of the internal chambers of the reactor is shown.

[0052] Figure 3 A communication connection diagram showing the implementation of system control by the control module is shown.

[0053] Figure 4 A flowchart of a method for measuring the oxygenation performance of an aerator in embodiments of the present application is shown. DETAILED DESCRIPTION

[0054] To make the purposes, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0055] In addition, the term "and / or" in the present document is only used to describe the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B can represent the following three cases: A exists alone, A and B exist together, and B exists alone. In addition, the character " / " in the present document generally represents an "or" relationship between the front and rear associated objects.

[0056] The system and method for measuring the oxygenation performance of an aerator disclosed in the embodiments of the present application can make the measured oxygenation capacity parameters of the aerator closer to the oxygenation performance of the aerator in actual water treatment work, thereby facilitating more accurate control of the oxygenation rate of the aerator in the water treatment process.

[0057] In a first aspect, the embodiments of the present application disclose a system for measuring the oxygenation performance of an aerator.

[0058] Figure 1 A schematic diagram of a system for measuring the oxygenation performance of an aerator in the embodiments of the present application is shown.

[0059] Reference Figure 1 The system comprises a reactor, an oxygen scavenger adding module, a dissolved oxygen monitoring module, and a control module. The reactor contains sample water, and a to-be-measured aerator is arranged in the reactor to aerate and oxygenate the sample water. The oxygen scavenger adding module is used to add a first oxygen scavenger to the sample water in the reactor, and the addition rate of the first oxygen scavenger is controllable. The dissolved oxygen monitoring module is used to monitor the dissolved oxygen concentration in the sample water. The control module is connected to the aerator, the oxygen scavenger adding module, and the dissolved oxygen monitoring module, and is used to control the start of the aerator, the addition rate of the first oxygen scavenger, and the acquisition of the dissolved oxygen concentration. After the dissolved oxygen concentration is maintained within a preset concentration threshold for a preset time, the control module calculates an oxygenation capacity parameter of the aerator corresponding to the preset concentration threshold according to the addition rate of the oxygen scavenger.

[0060] Specifically, the reactor as a whole is barrel-shaped, and its internal space is used to contain sample water. The sample water is sample water used for measurement, and in the embodiments of the present application, the sample water is clean water.

[0061] The dissolved oxygen monitoring module comprises a dissolved oxygen meter, a flow-through tank, a circulating pump, a circulating valve, and a water inlet valve. The water inlet of the circulating pump is connected to an external water source and the internal space of the reactor, respectively. The circulating valve is connected to a node where the water inlet of the circulating pump and the reactor are connected. The water inlet valve is connected to a node where the circulating pump and the water source are connected. The water outlet of the circulating pump is connected to one end of the flow-through tank. The other end of the flow-through tank is connected to the reactor. The probe of the dissolved oxygen meter is arranged in the flow-through tank to acquire the dissolved oxygen concentration.

[0062] In the embodiment of the present application, the flow tank is sealed to realize the overall pipeline communication. The probe of the dissolved oxygen meter is arranged in the flow tank to measure the dissolved oxygen concentration of the sample water flowing through the flow tank. The dissolved oxygen meter can be an electrochemical dissolved oxygen meter.

[0063] When the circulating pump is started, the water inlet valve is opened, and the circulating valve is closed, it is the reactor water inlet state, at this time the dissolved oxygen meter is closed, and the external clean water enters the reactor under the action of the circulating pump, and stops when reaching the preset water level. When the circulating pump is started, the circulating valve is opened, and the water inlet valve is closed, it is the dissolved oxygen concentration monitoring state of the sample water in the reactor, at this time the sample water in the reactor circulates through the flow tank and is detected by the dissolved oxygen meter to continuously collect the dissolved oxygen concentration of the sample water in the reactor. When the water inlet valve and the circulating valve are both opened and the circulating pump is stopped, it is the reactor drainage state. In this way, the reuse of the circulating pump and the reuse of the water inlet and drainage pipeline and valve structure can be realized, which is beneficial to reduce the cost of the system.

[0064] Further, the oxygen scavenger adding module comprises a first storage bin, a second storage bin, a first dosing valve, a second dosing valve and a dosing pump.

[0065] The first storage bin is used for containing the first oxygen scavenger, the second storage bin is used for containing the second oxygen scavenger, the water inlet of the dosing pump is connected with the first storage bin and the second storage bin respectively, the first dosing valve is arranged at the node where the water inlet of the dosing pump is connected with the first storage bin, the second dosing valve is arranged at the node where the water inlet of the dosing pump is connected with the second storage bin, and the water outlet of the dosing pump is connected with the reactor, and the purity of the second oxygen scavenger is lower than that of the first oxygen scavenger.

[0066] The first oxygen scavenger and the second oxygen scavenger are both reducing agents, such as sulfite, ferrous sulfate, carbon disulfide, sodium peroxide and the like, which can reduce oxygen to water or oxide by reacting with oxygen and be oxidized at the same time. In order to ensure the measurement accuracy, the first oxygen scavenger and the second oxygen scavenger should be the same substance. In the embodiment of the present application, the first oxygen scavenger and the second oxygen scavenger are both sodium sulfite (Na2SO3) solution, and the chemical reaction formula of sodium sulfite and oxygen is 2Na2SO3+O2=2Na2SO4. In order to accelerate the reaction, a catalyst copper sulfate is used. The purity of the first oxygen scavenger is higher than that of the second oxygen scavenger, for example, the first oxygen scavenger is configured by using analytical pure sodium sulfite, and the second oxygen scavenger is configured by using chemical pure (industrial grade) sodium sulfite. The concentration of the first oxygen scavenger is a known preset concentration, so as to determine the amount of consumed sodium sulfite according to the amount of consumed first oxygen scavenger. In the embodiment of the present application, in order to more accurately control the adding rate of the first oxygen scavenger, the dosing pump is specifically a peristaltic pump.

[0067] Since the cost of coarse sodium sulfite is lower than that of pure sodium sulfite, the first oxygen scavenger (pure sodium sulfite solution) is used in titration, and the second oxygen scavenger (coarse sodium sulfite solution) is used at other times, such as eliminating the dissolved oxygen initially contained in the sample water, which is beneficial to reduce the application cost of the system.

[0068] In order to realize the detection of the air pressure of the environment where the sample water is located, the system further comprises an air pressure monitoring module, which comprises an exhaust pipeline, an air pressure gauge and an exhaust valve;

[0069] The reactor is sealed, one end of the exhaust pipeline is connected to the top of the reactor, and the other end is connected to the atmospheric environment, the exhaust valve is arranged in the exhaust pipeline, and the air pressure gauge is arranged in the exhaust pipeline between the reactor and the exhaust valve, and the opening degree of the exhaust valve is controllable.

[0070] By changing the opening degree of the exhaust valve, the exhaust speed of the reactor can be changed, so that the air pressure in the reactor can be changed. The data collected by the air pressure gauge is the first air pressure data. On the one hand, the first air pressure data can reflect the air pressure in the reactor, which is beneficial to monitor the air pressure caused by exhaust failure in the reactor, and on the other hand, the air pressure in the reactor can be controlled by controlling the opening degree of the exhaust valve, so as to realize the simulation of different air pressure environments, so as to more accurately measure the oxygenation capacity of the aerator.

[0071] In order to further improve the measurement accuracy of the oxygenation capacity, the reactor comprises a first chamber, a second chamber and a third chamber, the first chamber is connected to the second chamber, the first chamber and the second chamber are connected to the same communication structure, the communication structure is connected to the third chamber, the first chamber, the second chamber and the third chamber all contain the sample water, the aerator is arranged in the sample water in the first chamber, the first oxygen scavenger is added to the sample water in the second chamber, and the dissolved oxygen concentration is measured from the sample water in the third chamber.

[0072] Figure 2 A cross-sectional schematic diagram of the internal chamber division of the reactor is shown.

[0073] Referring to Figure 1 and Figure 2 When the aerator performs aeration and oxygenation, the bubbles generated by the aerator float up; when the first oxygen scavenger is added to the sample water, it diffuses downward and outward under the action of concentration gradient, and the baffle can avoid the first oxygen scavenger meeting the floating bubbles as much as possible during the diffusion process, so as to cause the consumption of the first oxygen scavenger to be too high and affect the accuracy of the oxygenation capacity parameter calculated finally.

[0074] In order to guarantee the controllable working state of the aerator, the system further comprises a gas supply module, the gas supply module comprises a blower, an air inlet valve, a gas supply pressure gauge and a gas flow meter, the air outlet of the blower is connected in communication with the air inlet of the aerator, the air inlet valve is arranged in communication between the air outlet of the blower and the air inlet of the aerator, and the gas supply pressure gauge and the gas flow meter are arranged in communication between the air inlet valve and the air inlet of the aerator. In the embodiment of the application, the blower is a variable frequency blower.

[0075] The gas supply pressure and the gas supply flow of different aerators are different, and by controlling the gas supply pressure and the gas supply flow through the gas supply module, the gas supply demand of different types of aerators can be met, and the availability of the system is increased.

[0076] Figure 3 A communication connection schematic diagram in which the control module realizes system control is shown.

[0077] In combination Figure 1 and Figure 3 The system further comprises a temperature detection module and a depth detection module, the temperature detection module is used to detect first temperature data of sample water in the reactor, the depth detection module is used to detect first water depth data at the aerator, and the control module is connected with the temperature detection module and the depth detection module to obtain the first temperature data and the first water depth data.

[0078] In the embodiment of the application, the temperature detection module is a temperature sensor, which is used to measure the temperature of the sample water in the reactor. In order to improve the accuracy of the measurement result, a plurality of temperature sensors can be arranged in the reactor and on the inner wall of the reactor, and the average value of the measured temperatures is taken as the first temperature data. The depth detection module is a water level sensor, which is used to detect the water level of the sample water in the reactor. Since the setting position of the aerator is fixed (conventional fixing methods such as clamping and screwing can be used, which will not be described), the first water depth data at the position of the aerator can be calculated in combination with the position of the aerator and the water level of the sample water in the reactor, and the first water depth data is the water depth of the median value of the height of the aerator.

[0079] The control module can be specifically a single-chip microcomputer controller or a programmable controller, which serves as a management control center of the system, monitors each part of the system, and finally realizes the calculation of the oxygenation capacity parameter of the aerator.

[0080] Specifically, the control module is connected with the aerator, the deoxygenation agent adding module and the dissolved oxygen monitoring module, and is used to control the starting of the aerator, control the adding rate of the first deoxygenation agent and collect the dissolved oxygen concentration; after the dissolved oxygen concentration is maintained within a preset concentration threshold value for a preset time, the control module calculates the oxygenation capacity parameter of the aerator corresponding to the preset concentration threshold value according to the adding rate of the deoxygenation agent.

[0081] The control module is connected with the dissolved oxygen meter, the circulating pump, the circulating valve and the water inlet valve, so as to collect the dissolved oxygen concentration, and to control the start and stop of the circulating pump, and to control the opening and closing of the circulating valve and the water inlet valve.

[0082] The control module is connected with the dosing pump, the first dosing valve and the second dosing valve, so as to control the pumping speed of the dosing pump, and to control the opening and closing of the first dosing valve and the second dosing valve; before the aeration device is started, the control module controls the dosing pump to open, the first dosing valve to close, and the second dosing valve to open, so as to control the addition of the second oxygen scavenger in the sample water in the reactor, so that the dissolved oxygen concentration is lower than the preset concentration threshold.

[0083] The control module is connected with the air pressure gauge and the exhaust valve, so as to receive the first air pressure data collected by the air pressure gauge, and to control the opening degree of the exhaust valve.

[0084] The control module is connected with the air blower, the air inlet valve, the air supply pressure gauge and the gas flow meter, so as to control the air blowing power of the air blower, to control the opening and closing of the air inlet valve, and to collect the air supply pressure collected by the air supply pressure gauge and the air supply flow collected by the gas flow meter.

[0085] When the oxygenation capacity of the aeration device is measured by using the system, the system sequentially performs the following actions under the control of the control module:

[0086] Action one, control the exhaust valve to open, control the circulating pump to start, the water inlet valve to open, and the circulating valve to close, so that clean water enters the reactor as sample water; after the sample water level reaches the target water level value, so that the first water depth data is the target water depth value, control the water inlet valve to close, the circulating valve to open, and the dissolved oxygen meter to start and monitor the dissolved oxygen concentration;

[0087] Action two, control the dosing pump to open, and the second dosing valve to open, so as to add the second oxygen scavenger to the sample water for oxygen scavenging, until the dissolved oxygen concentration of the sample water is lower than the preset concentration threshold;

[0088] Action three, control the air blower to open, and the air inlet valve to open, so that the air supply pressure is the pre-obtained rated air supply pressure, and the air supply flow is the pre-obtained rated air supply flow, so that the aeration device works in the rated working state; at the same time, change the opening degree of the exhaust valve, so that the first air pressure data is the target air pressure data; at the same time, close the second dosing valve, open the first dosing valve, and change the pumping power of the dosing pump, until the dissolved oxygen concentration collected by the dissolved oxygen meter is stable at the preset concentration threshold;

[0089] Action four, according to the consumption amount of the first oxygen scavenger per unit time, the oxygenation capacity parameter of the aerator is calculated, the oxygenation capacity parameter includes the oxygen transfer rate and the oxygenation capacity value, the specific calculation principle is that, according to the reaction formula and the consumption amount of the first oxygen scavenger per unit time, the amount of dissolved oxygen transferred by the aerator to the sample water per unit time can be calculated, that is, the oxygenation capacity value can be calculated, and then the oxygen transfer rate of the aerator per unit area can be calculated in combination with the oxygenation capacity value and the pre-acquired outer surface area of the aerator.

[0090] In the specific calculation logic, after the dissolved oxygen concentration collected by the dissolved oxygen meter is stabilized at the preset concentration threshold, the consumption volume of the first oxygen scavenger solution per unit time is V, the mass concentration of the first oxygen scavenger solution is c, and the mass of Na2SO3 consumed per unit time is m1, that is, m1=V×c.

[0091] Let the molar mass of Na2SO3 be M1, then the amount of substance n1 of Na2SO3 consumed per unit time is m1 / M1.

[0092] The chemical reaction formula of the first oxygen scavenger Na2SO3 and oxygen is 2Na2SO3+O2=2Na2SO4. According to the principle that the ratio of the stoichiometric number of each substance in the chemical reaction formula is equal to the ratio of the amount of substance, n1 / n2=M1 / M2. Based on this, the amount of substance n2 of O2 consumed per unit time can be calculated as n2=m1 / M2.

[0093] Let the molar mass of dissolved oxygen be M2, then the consumption mass of dissolved oxygen per unit time is m2.

[0094] Let the oxygenation capacity of the aerator be E L , the oxygenation capacity is the mass of oxygen transferred by the aerator to the sample water per unit time, and the dissolved oxygen concentration in the sample water remains unchanged, that is, the mass of oxygen transferred by the aerator to the sample water per unit time is equal to the consumption mass of dissolved oxygen per unit time, that is, E L =m2.

[0095] Let the oxygen transfer rate of the aerator be R, and the surface area of the aerator be S, then E L =R×S, the oxygen transfer rate R of the aerator can be calculated.

[0096] Based on the above actions, the oxygenation capacity value and the oxygen transfer rate under the conditions of the first depth data, the preset concentration threshold, the first air pressure data, and the sample water being clear water can be calculated under the rated air supply flow rate and the rated air supply pressure of the aerator. If there are multiple oxygenation capacity parameter measurement requirements under the conditions of multiple first depth data, multiple preset concentration data, and multiple first air pressure data, and if the aerator has multiple rated operating states (multiple rated air supply flow rates and rated air supply pressures), the measurement conditions and the air supply parameters can also be controlled separately for measurement, and finally an oxygenation capacity parameter table with measurement conditions and air supply conditions is generated.

[0097] Further, in order to realize the measurement of the oxygenation capacity parameter more in line with the actual water treatment process, a salinity control module and a temperature control module can be added to the measurement system, the salinity control module being used to change the salinity data of the sample water in the reactor, and the temperature control module being used to change the temperature data of the sample water in the reactor.

[0098] In actual measurement actions, the salinity data and the temperature data of the sample water can also be controlled at target salinity and target temperature for oxygenation capacity measurement, making the measurement conditions more abundant and conforming to the actual use environment from more dimensions, so that the final measurement results can more accurately reflect the actual application situation.

[0099] Further, the control module is further configured to:

[0100] Based on the historical measurement record big data, an oxygenation capacity prediction model is trained, the oxygenation capacity prediction model including an input layer, multiple hidden layers, and an output layer;

[0101] The historical measurement record big data includes multiple historical measurement record data, each historical measurement record data including measurement conditions of the aerator, air supply conditions of the aerator, and a measurement result of the oxygenation capacity parameter, the measurement conditions including one or more of temperature data of the sample water, air pressure data of the environment in which the sample water is located, salinity data of the sample water, depth data at the aerator, and a preset concentration threshold value to be stabilized during measurement, the air supply conditions including air supply pressure data and air supply flow rate data, and the measurement result of the oxygenation capacity parameter including an oxygenation capacity value and an oxygen transfer coefficient;

[0102] The oxygenation capacity prediction model is used to input the measurement conditions of the aerator to be measured and the air supply conditions of the aerator, to output an expected result of the oxygenation capacity parameter.

[0103] The oxygenation capacity prediction model trains model parameters with the condition of reducing the deviation degree between the expected result and the measurement result.

[0104] The system in the application process, the change of measurement condition can make the measurement result more accurately reflect the aeration device actual water treatment work in the ability, but the more the dimension of measurement condition, the more the combination of measurement condition change, it is difficult to simulate the measurement of all aeration device all possible measurement condition combination of oxygenation capacity parameter, therefore, can according to different aeration device different measurement condition, the measurement result of the history measurement record data under the supply gas condition to train the oxygenation capacity prediction model, in the actual aeration device oxygenation capacity measurement, only a key and limited one or several groups of measurement conditions and supply gas conditions, the application system actually measures the oxygenation capacity parameter, and the oxygenation capacity parameter of the aeration device under other measurement conditions and supply gas conditions which is expected to obtain can be obtained by using the oxygenation capacity prediction model to obtain the expected result, so as to finally obtain the oxygenation capacity parameter of the aeration device under as many measurement conditions and supply gas conditions as possible.

[0105] Of course, in order to further improve the accuracy of the expected result, two known measurement condition values are generally used to predict the unknown measurement condition intermediate value.

[0106] The above is the disclosure of the system embodiment of the system for measuring the oxygenation performance of the aeration device in the application, and the application will be further disclosed in combination with the method embodiment.

[0107] In a second aspect, the application provides a method for measuring the oxygenation performance of an aeration device.

[0108] Figure 4 A flow chart of a method for measuring the oxygenation performance of an aeration device in an embodiment of the application is shown.

[0109] The method specifically comprises the following steps:

[0110] S410: control the start of the aeration device to be measured, the aeration device is in the reactor, and is used for aeration and oxygenation of sample water in the reactor

[0111] S420: adding a first oxygen scavenger to the sample water in the reactor, and controlling the addition rate of the first oxygen scavenger;

[0112] S430: collecting the dissolved oxygen concentration in the sample water;

[0113] S440: after the dissolved oxygen concentration is kept within the preset concentration threshold value for a preset time, calculating the oxygenation capacity parameter of the aeration device corresponding to the preset concentration threshold value according to the addition rate of the oxygen scavenger.

[0114] By adopting the technical scheme, the oxygenation capacity parameter of the aerator can be calculated by using the adding rate of the first oxygen scavenger when the dissolved oxygen concentration is maintained at the preset concentration threshold, so that the measured oxygenation capacity parameter of the aerator is more consistent with the condition of maintaining the dissolved oxygen concentration stable in the actual water treatment task, and thus the measured oxygenation capacity parameter of the aerator more accurately reflects the oxygenation capacity of the aerator in the actual execution of the water treatment task, so as to more accurately control the oxygenation rate of the aerator.

[0115] Further, the preset concentration threshold has one or more.

[0116] Further, the method further comprises:

[0117] The reactor comprises a first chamber, a second chamber and a third chamber, the first chamber is communicated with the second chamber, the first chamber and the second chamber are communicated to the same communication structure, the communication structure is communicated with the third chamber, the first chamber, the second chamber and the third chamber all contain the sample water, the aerator is arranged in the sample water in the first chamber, the first oxygen scavenger is added to the sample water in the second chamber, and the dissolved oxygen concentration is measured from the sample water in the third chamber.

[0118] Further, the method further comprises:

[0119] Based on the historical measurement record big data, the oxygenation capacity prediction model is trained, the oxygenation capacity prediction model comprises an input layer, multiple hidden layers and an output layer;

[0120] The historical measurement record big data comprises multiple historical measurement record data, each historical measurement record data comprises measurement conditions of the aerator, gas supply conditions of the aerator and measurement results of the oxygenation capacity parameter, the measurement conditions comprise temperature data of sample water, air pressure data of an environment where the sample water is located, salinity data of the sample water, depth data at the aerator, and one or more of the preset concentration threshold values to be stabilized at the time of measurement, the gas supply conditions comprise gas supply pressure data and gas supply flow data, and the measurement results of the oxygenation capacity parameter comprise an oxygenation capacity value and an oxygen transfer coefficient;

[0121] The oxygenation capacity prediction model is used to input the measurement conditions of the to-be-measured aerator and the gas supply conditions of the aerator to output expected results of the oxygenation capacity parameter.

[0122] The oxygenation capacity prediction model is trained with the condition of reducing the deviation degree between the expected results and the measurement results.

[0123] Further, the method further comprises:

[0124] A second oxygen scavenger is added to the sample water in the reactor before the aerator is started to bring the dissolved oxygen concentration below a preset concentration threshold; the second oxygen scavenger has a lower purity than the first oxygen scavenger.

[0125] It is noted that, for the aforementioned method embodiments, the elements and acts of any of the methods can be combined in other orders, or performed concurrently, that the ordering of the acts or description thereof provided herein is not necessarily limiting. It is also noted that portions of respective embodiments can be implemented by hardware, software, firmware or combinations thereof, that the application relates equally to methods and apparatus, and that any feature described herein can be implemented in either hardware or software.

[0126] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the described method steps can refer to the corresponding process in the foregoing system embodiments, which will not be described here.

[0127] The above description is merely preferred embodiments of the present application and a description of the technical principles of the application. Those skilled in the art should understand that the disclosed range of the present application is not limited to the technical solutions formed by the specific combinations of the above technical features, and also covers other technical solutions formed by any combinations of the above technical features or equivalent features without departing from the above disclosed concept. For example, the above features are replaced with the technical features disclosed in the present application (but not limited to) having similar functions to form technical solutions.

Claims

1. A method for measuring the oxygenation performance of an aerator, characterized in that, The method comprises: controlling the start of an aeration device to be tested, the aeration device being in a reactor for aerating and oxygenating sample water in the reactor; adding a first oxygen scavenger to the sample water in the reactor, and controlling the addition rate of the first oxygen scavenger; collecting the dissolved oxygen concentration in the sample water; after the dissolved oxygen concentration is maintained within a preset concentration threshold for a preset time, calculating the oxygenation capacity parameter of the aeration device corresponding to the preset concentration threshold according to the addition rate of the first oxygen scavenger.

2. The method of claim 1, wherein, The preset concentration threshold has one or more.

3. The method of claim 2, wherein, The method further comprises: The reactor comprises a first chamber, a second chamber and a third chamber, the first chamber is communicated with the second chamber, the first chamber and the second chamber are communicated to the same communication structure, the communication structure is communicated with the third chamber, the first chamber, the second chamber and the third chamber all contain the sample water, the aeration device is arranged in the sample water in the first chamber, the first oxygen scavenger is added to the sample water in the second chamber, and the dissolved oxygen concentration is measured from the sample water in the third chamber. Or the method further comprises: Before the start of the aeration device, a second oxygen scavenger is added to the sample water in the reactor to make the dissolved oxygen concentration lower than the preset concentration threshold; the purity of the second oxygen scavenger is lower than that of the first oxygen scavenger.

4. The method of claim 3, wherein, The method further comprises: Based on historical measurement record big data, an oxygenation capacity prediction model is trained, the oxygenation capacity prediction model comprises an input layer, multiple hidden layers and an output layer; The historical measurement record big data comprises multiple historical measurement record data, each historical measurement record data comprises measurement conditions of an aeration device, gas supply conditions of the aeration device and measurement results of an oxygenation capacity parameter, the measurement conditions comprise temperature data of sample water, air pressure data of an environment where the sample water is located, salinity data of the sample water, depth data at the aeration device, one or more of preset concentration thresholds to be stabilized at during measurement, the gas supply conditions comprise gas supply pressure data and gas supply flow data, and the measurement results of the oxygenation capacity parameter comprise an oxygenation capacity value and an oxygen transfer coefficient; The oxygenation capacity prediction model is used to input the measurement conditions of the aeration device to be tested and the gas supply conditions of the aeration device to output expected results of the oxygenation capacity parameter; The oxygenation capacity prediction model is trained with the condition of reducing the deviation degree between the expected results and the measurement results.

5. A system for measuring the oxygenation performance of an aerator, characterized by, The system comprises: a reactor, an oxygen scavenger adding module, a dissolved oxygen monitoring module and a control module; The reactor contains sample water, and an aeration device to be tested is arranged in the reactor for aerating and oxygenating the sample water; The oxygen scavenger adding module is used to add a first oxygen scavenger to the sample water in the reactor, and the addition rate of the first oxygen scavenger is controllable; The dissolved oxygen monitoring module is used to monitor the dissolved oxygen concentration in the sample water; The control module is connected with the aeration device, the oxygen scavenger adding module and the dissolved oxygen monitoring module, and is used to control the start of the aeration device, the addition rate of the first oxygen scavenger and the collection of the dissolved oxygen concentration; after the dissolved oxygen concentration is maintained within a preset concentration threshold for a preset time, the control module calculates the oxygenation capacity parameter of the aeration device corresponding to the preset concentration threshold according to the addition rate of the oxygen scavenger.

6. The system of claim 5, wherein, The dissolved oxygen monitoring module comprises a dissolved oxygen meter, a flow tank, a circulating pump, a circulating valve and a water inlet valve, the water inlet of the circulating pump is connected with a water source and a reactor respectively, the circulating valve is arranged at a node where the water inlet of the circulating pump is connected with the reactor, the water inlet valve is arranged at a node where the circulating pump is connected with the water source, the water outlet of the circulating pump is connected with one end of the flow tank, the other end of the flow tank is connected with the reactor, and the probe of the dissolved oxygen meter is arranged in the flow tank for collecting the dissolved oxygen concentration; The control module is connected with the dissolved oxygen meter, the circulating pump, the circulating valve and the water inlet valve, for collecting the dissolved oxygen concentration, controlling the start and stop of the circulating pump, and controlling the opening and closing of the circulating valve and the water inlet valve.

7. The system of claim 6, wherein, The oxygen scavenger adding module comprises a first storage bin, a second storage bin, a first dosing valve, a second dosing valve and a dosing pump; The first storage bin is used for containing a first oxygen scavenger, the second storage bin is used for containing a second oxygen scavenger, the water inlet of the dosing pump is connected with the first storage bin and the second storage bin respectively, the first dosing valve is arranged at a node where the water inlet of the dosing pump is connected with the first storage bin, the second dosing valve is arranged at a node where the water inlet of the dosing pump is connected with the second storage bin, the water outlet of the dosing pump is connected with the reactor, and the purity of the second oxygen scavenger is lower than that of the first oxygen scavenger; The control module is connected with the dosing pump, the first dosing valve and the second dosing valve, for controlling the pumping speed of the dosing pump, and controlling the opening and closing of the first dosing valve and the second dosing valve; before the aeration device is started, the control module controls the dosing pump to be opened, the first dosing valve to be closed and the second dosing valve to be opened, so as to control the second oxygen scavenger to be added into the sample water in the reactor, and the dissolved oxygen concentration to be lower than a preset concentration threshold.

8. The system of claim 7, wherein, Further comprising an air pressure monitoring module, the air pressure monitoring module comprises an exhaust pipeline, an air pressure gauge and an exhaust valve; The reactor is sealed, one end of the exhaust pipeline is connected with the top of the reactor, the other end is connected with the atmosphere, the exhaust valve is arranged in the exhaust pipeline, the air pressure gauge is arranged in the exhaust pipeline between the reactor and the exhaust valve, and the opening degree of the exhaust valve is controllable; The control module is connected with the air pressure gauge and the exhaust valve, for receiving the first air pressure data collected by the air pressure gauge, and for controlling the opening degree of the exhaust valve.

9. The system of claim 8, wherein, Further comprising a gas supply module, the gas supply module comprises a blower, an air inlet valve, a gas supply pressure gauge and a gas flow meter, the air inlet of the blower is connected with the air inlet of the aeration device, the air inlet valve is arranged between the air inlet of the blower and the air inlet of the aeration device, and the gas supply pressure gauge and the gas flow meter are arranged between the air inlet valve and the air inlet of the aeration device; The control module is connected with the blower, the air inlet valve, the gas supply pressure gauge and the gas flow meter, for controlling the air blowing power of the blower, the opening and closing of the air inlet valve, the gas supply pressure collected by the gas supply pressure gauge and the gas supply flow collected by the gas flow meter. Or the reactor comprises a first chamber, a second chamber and a third chamber, the first chamber is communicated with the second chamber, the first chamber and the second chamber are communicated to the same communication structure, the communication structure is communicated with the third chamber, the first chamber, the second chamber and the third chamber all contain the sample water, the aerator is arranged in the sample water in the first chamber, the first oxygen scavenger is added in the sample water in the second chamber, and the dissolved oxygen concentration is measured in the sample water in the third chamber.

10. The system of claim 9, wherein, The system further comprises a temperature detection module and a depth detection module, the temperature detection module is used for detecting first temperature data of the sample water in the reactor, the depth detection module is used for detecting first water depth data at the aerator, and the control module is connected with the temperature detection module and the depth detection module to obtain the first temperature data and the first water depth data. The control module is further configured to: train an oxygenation capacity prediction model based on historical measurement record big data, the oxygenation capacity prediction model comprising an input layer, multiple hidden layers and an output layer; the historical measurement record big data comprises multiple historical measurement record data, each historical measurement record data comprising measurement conditions of the aerator, gas supply conditions of the aerator and measurement results of oxygenation capacity parameters, the measurement conditions comprising one or more of temperature data of the sample water, air pressure data of the environment where the sample water is located, salinity data of the sample water, depth data at the aerator and a preset concentration threshold value to be stabilized at the time of measurement, the gas supply conditions comprising gas supply pressure data and gas supply flow data, and the measurement results of the oxygenation capacity parameters comprising an oxygenation capacity value and an oxygen transfer coefficient; the oxygenation capacity prediction model is used for inputting measurement conditions of a to-be-measured aerator and gas supply conditions of the aerator to output expected results of oxygenation capacity parameters; the oxygenation capacity prediction model is trained with the condition of reducing the deviation degree between the expected results and the measurement results.

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