CN111718015A - Ultra-fine nano-reaction system - Google Patents

Abstract

The invention provides an ultra-fine nano-reaction system, comprising: a sewage monitoring device and an ultra-fine nano-generating device; the sewage monitoring device includes a sample collector, a programmable logic controller, a dissolved oxygen sensor and an uploading unit; The programmable logic controller collects and analyzes the corresponding data in the sewage through the sample collector and the dissolved oxygen sensor, obtains various pollution values, and then controls the oxygen production equipment and the ultra-fine nano-generating device to work, and sends the data through the uploading unit; The ultra-fine nano-generating device includes: a water inlet nozzle, a gas-liquid mixing chamber, a water outlet and an air inlet; the water inlet nozzle is connected with a water pump, and a spiral groove is arranged on the inner wall of the gas-liquid mixing chamber, and the The air inlet is arranged on the gas-liquid mixing chamber and communicates with the spiral groove.

Description

Ultra-fine nano-reaction system

technical field

The invention relates to the technical field of wastewater treatment, in particular to an ultrafine nanometer reaction system.

Background technique

The pollution emitted by human activities has exceeded the limit of the water's self-purification ability, and the natural dissolved oxygen content of natural waters is usually about 1ppm. The pollution emitted by human activities has exceeded the limit of the water's self-purification ability, and the natural dissolved oxygen content of natural waters is usually about 1ppm. Because there is no dissolved oxygen in the water, a large number of aerobic organisms growing in the water die and sink to the bottom of the water. After decaying and metamorphism, they are deposited as bottom sludge, which constitutes an internal pollution source in the water area. In addition, other pollutants such as garbage and sewage continue to be discharged. Into the water, the eutrophic pollution of the water area is further deteriorated, resulting in the outbreak of a variety of severe pollution manifestations, such as odor, cyanobacteria, red tide, water hyacinth, etc. Therefore, the sewage treatment process is actually a process of supplying sufficient active oxygen to the water. Only by ensuring that there are sufficient active oxygen and dissolved oxygen in the water can the sewage treatment be thorough and there will be no subsequent sludge pollution after sewage treatment.

The working principle of the existing nano system is that the monitoring of sewage is carried out by taking water manually, and then analyzing the water quality. The water outlet at one end is sprayed out, and the water flow in the air-water mixing chamber forms a negative pressure state. There is also an air inlet on the air-water mixing chamber. The air port is sucked in and mixed with the sewage in the air-water mixing chamber, and is ejected from the water outlet. The bubbles generated by the existing nano-devices are no more than 2 million/ml/h in water at most, the diameter of the bubbles is about 1-100 microns, the color is cloudy, the bubbles slowly float up and disappear in the water, and the existence time is about 4-8 hours. . The nanometer system in the prior art has limited water intake depth, single sample, and cannot monitor water quality in real time. In addition, the nanometer device in the system has large bubble diameter and short existence time.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is to provide an ultra-fine nano-reaction system in view of the deficiencies of the prior art, in which the water quality is sampled in real time underwater in a combined manner, and the ultra-fine nano-generating device is quickly activated according to the sampling results, so that the Sewage cleaning. In addition, the ultra-fine nano-bubble of the present invention is generated by the spiral groove in the gas-water mixing chamber, and the diameter of the bubble is small, so it remains in the water for a long time.

The technical problem to be solved by the present invention is achieved through the following technical solutions:

The invention provides an ultra-fine nano-reaction system, comprising: a sewage monitoring device and an ultra-fine nano-reaction device; wherein, the sewage monitoring device includes a sample collector, a programmable logic controller, a dissolved oxygen sensor and an uploading unit; The programmable logic controller collects and analyzes the corresponding data in the sewage through the sample collector and the dissolved oxygen sensor, obtains various pollution values, and then controls the oxygen production equipment and the ultra-fine nano reaction device to work, and sends the data through the uploading unit. The ultra-fine nano reaction device includes: a water inlet nozzle, a gas-liquid mixing chamber, a water outlet and an air inlet; the water inlet nozzle is connected with a water pump, and a spiral groove is arranged on the inner wall of the gas-liquid mixing chamber, The air inlet is arranged on the gas-liquid mixing chamber and communicates with the spiral groove.

Preferably, the depth of the spiral groove is 1-2 mm, and the width is 1-2 mm.

Preferably, the gas-liquid mixing chamber is a sealed chamber.

Preferably, the sample collector includes a barrel, two semicircular upper covers with shafts and a movable bottom plate, a lead block, a thermometer, a rubber tube and a water stop; the barrel is a transparent plexiglass barrel.

Preferably, the dissolved oxygen sensor is used to measure the oxygen content in water, the measurement range is 0～20mg/L, and the operating temperature is -5～50C.

Preferably, the uploading unit adopts an automatic online monitor, and uses a mobile app to upload data.

Preferably, the system is provided with a cleaning unit which utilizes ultrasonic waves to clean the sample collector and various sensors of the device.

Preferably, the system further includes a conductivity sensor, which is an inductive conductivity sensor, for monitoring the conductivity of the sewage neutralization process.

Preferably, the system also includes a pH sensor for collecting and monitoring the pH of the sewage, with a stability of ±0.02pH/24h.

Preferably, the programmable logic controller is used for the collection, analysis and processing of monitoring data; the collected data is compared with the pre-set dissolved oxygen value after calculation and analysis, and if it is lower than the set value, the oxygen production equipment will be activated. , on the contrary, if it is higher than the set value, the oxygen generator will stop running.

The ultrafine nanometer reaction system of the invention adopts advanced PLC programmability and sensor technology to collect, analyze and process the process variables of the main parameters. Through precise control, the nano-generating device can always work at the most efficient stage, and the variables of the entire working process are recorded to form a curve analysis graph. The newly added ozone preparation and control functions with the nano-generator can solve the application needs of more and more fields. The device of the invention has a compact and reasonable structure and layout, and the electrical control part and the fluid part are completely isolated and separated, which ensures the monitoring safety and improves the protection level of the system. Using an intuitive human-computer interaction touch interface, the entire interface is rich in color, runs smoothly, and is easy to operate. The communication interface is reserved and the advanced Internet of Things technology can be connected to the cloud platform for remote monitoring, and the monitoring data can be analyzed and summarized thousands of miles away, realizing remote deployment and local control, which greatly saves valuable human resources. In addition, the ultra-fine nano-generating device can quickly increase the dissolved oxygen level, greatly reduce the power consumption of oxygen supply, reduce the amount of excess sludge and reduce the amount of chemicals used, and optimize the effluent quality.

The technical solutions of the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

Description of drawings

Fig. 1 is the control structure block diagram of the ultrafine nano reaction system of the present invention;

Fig. 2 is the structural representation of the ultrafine nanometer generating device of the present invention;

FIG. 3 is a cross-sectional view taken along the line A-A of FIG. 2 .

In the picture: 1-sample collector, 2-programmable logic controller, 3-dissolved oxygen sensor, 4-upload unit, 5-cleaning unit, 6-conductivity sensor, 7-PH value sensor, 8-oxygen generator , 9-Ultrafine Nanogenerating Device.

Detailed ways

FIG. 1 is a block diagram of the control structure of the ultra-fine nano-reaction system of the present invention. As shown in FIG. 1 , the present invention provides an ultra-fine nano-reaction system, including: a sewage monitoring device and an ultra-fine nano-generating device 9;

Wherein, the sewage monitoring device includes a sample collector 1, a programmable logic controller 2, a dissolved oxygen sensor 3 and an uploading unit 4; the programmable logic controller 2 collects and analyzes through the sample collector 1 and the dissolved oxygen sensor 3 Corresponding data in the sewage, obtain various pollution values, then control the oxygen production equipment and the ultra-fine nano-generating device 9 to work, and send the data through the uploading unit 4;

FIG. 2 is a schematic structural diagram of an ultra-fine nano-generating device of the present invention, and FIG. 3 is a cross-sectional view taken along the direction A-A of FIG. 2 . As shown in FIGS. 2-3 , the ultra-fine nano-generating device 9 includes: a water inlet nozzle 91, a gas-liquid mixing chamber 92, a water outlet 93 and an air inlet 94; the water inlet nozzle 91 is connected to a water pump, so The air inlet 94 is connected with an ozone generator (not shown in the figure), a spiral groove 921 is provided on the inner wall 92 of the gas-liquid mixing chamber, and the air inlet 94 is arranged in the gas-liquid mixing chamber 92 and communicate with the spiral groove 921. The helical groove 921 has a depth of 1-2 mm and a width of 1-2 mm. Preferably, the helical groove 921 has a depth of 0.5 mm and a width of 1.5 mm. Preferably, the gas-liquid mixing chamber 92 is a sealed chamber.

The dissolved oxygen sensor 3 is used to measure the oxygen content in water, with a measurement range of 0 to 20 mg/L and an operating temperature of -5 to 50°C.

The uploading unit 4 adopts an automatic online monitor, and uses a mobile app to upload data.

The system is provided with a cleaning unit 5 which uses ultrasonic waves to clean the sample collector and individual sensors of the device.

The system also includes a conductivity sensor 6, which is an inductive conductivity sensor, for monitoring the conductivity of the sewage neutralization process.

The sample collector 1 includes a barrel, two semicircular upper covers with shafts and a movable bottom plate, a lead block, a thermometer, a rubber tube and a water stop clip; the barrel is a transparent plexiglass cylinder. The upper and lower movable flaps of the instrument are automatically opened and closed to realize the collection of water samples at the required depth. It is easy to use and can perform stratified sampling of liquids at different depths. Water sample collection. Technical parameters: Capacity: 1000mL, 2500mL, 5000mL; Sampling depth: 0-30m; Thermometer: Temperature measurement error ±1°C; When using, be careful to clamp the rubber tube of the water outlet first, and then open the two semicircular upper covers. Let the water collector sink into the water, and the bottom water inlet will automatically open. Water samples at different depths can be collected. A rope is attached to the top, water is fed below, and water is discharged from the top. When the water collector stops at different depths, the water samples collected are the water samples at this level. The sinking depth should be marked on the tether. When sinking to the required depth, lift the tether, and the upper cover and lower water inlet will be automatically closed. After lifting the water surface, do not touch the lower bottom to avoid water leakage. . Extend the rubber tube of the water outlet into the mouth of the container, loosen the iron clamp, and the water sample is injected into the container. Quantitative sample collection was performed using a plexiglass sampler in still and slow-flowing water. The sample collector is cleaned by the ultrasonic wave of the cleaning unit 5 before and after each sample collection.

The sample collector 1 is a plexiglass water collector: including a barrel body, two semicircular upper covers with shafts and a movable bottom plate, a lead block, a thermometer, a rubber tube and a water stop clip. The upper and lower movable flaps of the instrument are automatically opened and closed to realize the collection of water samples at the required depth. It is easy to use and can perform stratified sampling of liquids at different depths. Water sample collection. Technical parameters: Capacity: 1000mL, 2500mL, 5000mL; Sampling depth: 0-30m; Thermometer: Temperature measurement error ±1°C; Use ultrasonic waves to clean the barrel of the sample collector before each sample collection.

The programmable logic controller 2 (PLC=Programmable Logic Controller) is an electronic system for digital operation, which is specially designed for application in an industrial environment. It uses a type of programmable memory to store programs internally, execute user-oriented instructions such as logic operations, sequence control, timing, counting and arithmetic operations, and control various types of machinery through digital or analog input/output or production process. It is the core part of industrial control. As an industrial control computer, PLC can compile various control algorithm programs to complete closed-loop control. PLC has functions such as mathematical operations (including matrix operations, function operations, and logical operations), data transmission, data conversion, sorting, table lookup, and bit operations, and can complete monitoring data collection, analysis, and processing. These data are compared and judged with the pre-set dissolved oxygen value after calculation and analysis. If the value is lower than the set value, the oxygen production equipment will be started. Otherwise, the oxygen production equipment will be stopped if it is higher than the set value, so that the dissolved oxygen value of the water body is always kept at the set value. Within the range, this not only ensures the needs of the water treatment process, but also achieves the purpose of energy saving. The PLC can also control the conductivity sensor, the pH sensor 7 and the ozone generator to work.

The dissolved oxygen sensor 3 (DO) adopts fluorescence quenching technology. When the blue light emitted by the sensor irradiates the fluorescent substance on the fluorescent cap, the fluorescent substance is excited and emits red light. Since oxygen molecules can take away energy (quenching effect), the time and intensity of the excited red light are proportional to the concentration of oxygen molecules. Inversely proportional, the concentration of dissolved oxygen in water can be obtained by calculation. Main features: The sensor adopts a new type of oxygen-sensitive membrane, with its own NTC temperature compensation function, and the measurement results have good repeatability and stability; no oxygen consumption during measurement, no flow rate/agitation requirements; breakthrough fluorescence technology, no membrane and Electrolyte, basically no maintenance; built-in self-diagnosis function to ensure accurate data; digital sensor, strong anti-interference ability, long transmission distance; standard digital signal output, can realize integration and other equipment without transmitter. Networking; on-site installation of sensors is convenient and fast, and plug-and-play is realized. Since the dissolved oxygen value is the core of the whole system, the change value of the dissolved oxygen value during the whole monitoring process is drawn as a curve on the HMI man-machine interface for easy analysis, and the duration of the influence of the nanobubble dissolved oxygen value is recorded at the same time. .

The uploading unit 4 adopts an automatic online monitor, and uses a mobile app to upload data. Apply Android/iOS, store object OSS, official website: http://www.aliyun.com/product/oss; RAM/STS is responsible for generating temporary upload credentials.

The conductivity sensor 6 (COND) is an automatic instrument designed and developed based on a microprocessor. The purpose of its design is to be better applicable to the monitoring of the conductivity and the continuous and accurate temperature value in the process of water treatment control and neutralization. Measure and digitize distortion-free transmissions or remote analog transmissions. It has the following characteristics: small size, easy installation; using RS485 communication interface, the communication protocol conforms to the MODBUS-RTU mode; isolated 4-20mA output, convenient for users to record or remote measurement values; support using pure water to calibrate the sensor to ensure Measurement accuracy; temperature compensation PT1000 temperature measurement line, eliminating the influence of line resistance on temperature measurement.

The oxygen generator 8 is an ozone generator (O ₃ ), which uses a high-voltage current of a certain frequency to create a high-voltage corona electric field, so that the oxygen molecules in the electric field or around the electric field undergo electrochemical reactions to convert oxygen into oxygen. process for ozone. The high-voltage alternating current is applied to the high-voltage electrode with an insulator and a certain gap in the middle, so that the dried and purified air or oxygen can pass through. When the high-voltage alternating current reaches 10-15KV, a blue glow discharge (corona) is generated, and the free high-energy ions in the corona dissociate the _O2 molecules, which are polymerized into _O3 molecules by collision, thereby producing ozone. The ozone generator of the invention is made of titanium gold dehydroxylated quartz tube, and the ozone generator has the advantages of mature technology, stable operation, long service life, large ozone output (a single machine can reach 1Kg/h) and the like.

The PLC adopts Siemens S7-300 PLC to collect the DO dissolved oxygen content data in the measured water body in real time. After the data is calculated and analyzed, it is compared with the preset DO value. If the feedback value is lower than the set value, the oxygen generator 8 will be activated. The water pump and the nanometer head work and run, otherwise the water pump and the nanometer head of the oxygen generator 8 are stopped when the set value is higher than the set value, so that the DO dissolved oxygen value of the water body is always kept within the set range, which not only ensures that the water treatment process needs to be achieve the purpose of energy saving. Since DO dissolved oxygen value is the core of the whole system, the change value of DO during the whole monitoring process is drawn as a curve on the HMI man-machine interface for easy analysis, and the duration of the influence of nanobubble DO value is recorded at the same time. The dissolved oxygen sensor is cleaned by the ultrasonic wave of the cleaning unit 5 before and after each use.

The conductivity value collected by COND6 mainly reflects the change of the conductivity of the water body after maintaining a constant DO value and under the action of ozone. The present invention adopts an inductive conductivity sensor to monitor the conductivity of the sewage neutralization process. The ultrasonic waves of the cleaning unit 5 are used for cleaning before and after the conductivity is collected each time.

Working principle: The sewage monitoring device collects and monitors water samples in real time. The specific sampling and data monitoring have been described above and will not be repeated here. The PLC controls the start of the ultra-fine nano-generating device according to the monitoring value, and the sewage is pumped into the water inlet nozzle 91 through the water pump, and the water inlet nozzle 91 is aligned with the spiral groove 921 to spray water under pressure, and the water passes through the spiral groove 921 to form an accelerated spray. The principle is similar to that of a rifle barrel (smooth rifling). When the water is pressurized, the air inlet 94 forms a negative pressure. That is to say, since the gas-liquid mixing chamber 92 is a sealed chamber, the pressure of the water flow through the water pump is In the liquid mixing chamber 92, the discharge is accelerated through the spiral groove 921, and a negative pressure is generated at the same time to inhale at a high speed, and a gas-water mixture is formed at the water outlet 93, and the air is cut into nanostructures by water. It should be noted that, when the water body needs to be decolorized or disinfected, the ozone generator can be selected to be turned on, and the ozone generator is injected from the air inlet 94 to mix the ozone with the sewage. The action intensity and action time of ozone can be automatically adjusted and controlled according to process requirements, and time interval control can be adopted in the present invention. The ozone generator will run and stop within the set time according to the process requirements to ensure the effectiveness and controllability of the locomotive, and the monitoring and experimental personnel do not need to be on duty. The invention adopts titanium gold dehydroxylated quartz tube to make the ozone generator, which is used for decolorization or disinfection treatment of sewage. The nano-bubbles generated by the ultra-fine nano-generating device of the present invention are 460 million/ml/h in water, the diameter of the bubbles is 50-155 nanometers, colorless and transparent, the viscous force is greater than the buoyancy force, can produce Brownian motion, and can survive several times in water. weeks or months. According to 1mm=1000μm=1000nm, the surface area ratio of a bubble with a diameter of 1μm under a certain volume is theoretically 1000 times that of a bubble with a diameter of 1mm, that is, the contact area between air and water is increased by 1000 times, and various reaction speeds have also increased by more than 1000 times. The average diameter of nanobubbles is 50-155nm, which means that the processing capacity is more than 100,000 times that of ordinary aeration. Nanobubbles only do Brownian motion in water, and nanobubbles are 1/2000 of the rising speed of 1mm bubbles. Considering the increase in specific surface area, the gas dissolving power of nanobubbles is more than 200,000 times higher than that of ordinary air. Of course, in the case of nanobubbles, it can dissolve directly beyond saturation. The dissolved oxygen value can quickly reach a supersaturated state. Thereby, the utilization rate of oxygen is improved, so that the phosphate in the sewage is absorbed by the microorganisms. The dissolution of nanobubbles in water is a process in which the bubbles gradually shrink. The increase in pressure will increase the dissolution rate of the gas. With the increase of the surface area ratio, the shrinkage of the bubbles will become faster and faster, and finally dissolve into the water. Theoretical The pressure when the upper bubble is about to disappear is infinite. Because the nanobubbles are negatively charged, the positively charged pollutants or viruses will be adsorbed to the periphery of the nanobubbles in the water. The nanobubbles gradually become smaller under pressure and finally burst at about 4000MPa. When the pressure is broken, a high temperature will be generated in addition to the high pressure. Due to the high pressure and high temperature energy generated at the moment when the small nano-bubble bursts, the pollutants or bacteria will be decomposed and eliminated. At the same time, the components of the damaged pollutants are separated and floated on the water surface. When the nanobubble bursts, due to the dramatic change in the disappearance of the gas-liquid interface, the high-concentration ions accumulated on the interface release the accumulated chemical energy at once, which can stimulate and generate a large number of hydroxyl radicals. Hydroxyl radicals have an ultra-high redox potential, and the super-strong oxidation produced by them can degrade organic pollutants (such as phenol, etc.) that are difficult to oxidize and decompose in water under normal conditions, and realize the purification of water quality. This principle is the same as self-pressurized dissolution. Even when the gas content in the water body reaches the supersaturated condition, the nanobubble can continue the gas mass transfer process and maintain high mass transfer efficiency, making the nitrification speed fast and ammonia nitrogen completely removed. It is also based on the principle of large specific surface area, slow rise of bubbles and self-pressurized dissolution and finally disappears in water, greatly improving the solubility of gases (air, oxygen, ozone, carbon dioxide, etc.) in water.

Claims (10)

1. an ultrafine nanometer reaction system, is characterized in that, comprises: sewage monitoring device and ultrafine nanometer generating device; Wherein, the sewage monitoring device includes a sample collector, a programmable logic controller, a dissolved oxygen sensor and an uploading unit; the programmable logic controller collects and analyzes the corresponding data in the sewage through the sample collector and the dissolved oxygen sensor, Obtain various pollution values, then control the oxygen production equipment and the ultra-fine nano-generating device to work, and send data through the uploading unit; The ultra-fine nano-generating device includes: a water inlet nozzle, a gas-liquid mixing chamber, a water outlet and an air inlet; the water inlet nozzle is connected with a water pump, and a spiral groove is arranged on the inner wall of the gas-liquid mixing chamber, so the The air inlet is arranged on the gas-liquid mixing chamber and communicates with the spiral groove. 2 . The ultrafine nano reaction system according to claim 1 , wherein the spiral groove has a depth of 1-2 mm and a width of 1-2 mm. 3 . 3. The ultrafine nano reaction system according to claim 1 or 2, wherein the gas-liquid mixing chamber is a sealed chamber. 4. The ultrafine nano reaction system according to claim 1, wherein the sample collector comprises a barrel, two semicircular upper covers with shafts and a movable bottom plate, a lead block, a thermometer, a rubber tube and a water stop clip; the barrel is a transparent plexiglass barrel. 5 . The ultra-fine nano-reaction system according to claim 1 , wherein the dissolved oxygen sensor is used to measure the oxygen content in water, the measurement range is 0-20 mg/L, and the operating temperature is -5-50°C. 6 . 6. The ultrafine nano reaction system according to claim 1, wherein the uploading unit adopts an automatic online monitor, and uses a mobile phone app to upload data. 7 . The ultra-fine nano-reaction system according to claim 1 , wherein the system is provided with a cleaning unit, which uses ultrasonic waves to clean the sample collector and each sensor of the device. 8 . 8 . The ultra-fine nano-reaction system of claim 1 , wherein the system further comprises a conductivity sensor, which is an inductive conductivity sensor, for monitoring the conductivity of the sewage neutralization process. 9 . 9. The ultra-fine nano-reaction system according to claim 1, characterized in that, the system further comprises a pH value sensor for collecting and monitoring the pH value of sewage, and the stability is ±0.02pH/24h. 10. The ultra-fine nano-reaction system according to claim 1, wherein the programmable logic controller is used for collection, analysis and processing of monitoring data; Make a comparison judgment, if it is lower than the set value, it will start the oxygen production equipment, otherwise, if it is higher than the set value, it will stop the operation of the oxygen production equipment.

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