Intelligent test system and method for wettability of dust by natural sedimentation method

Abstract

The invention discloses an intelligent test system and method for dust wettability by a natural sedimentation method, and relates to the technical field of dust wettability testing, the system comprises a liquid storage and preparation subsystem, a dust loading and sedimentation subsystem, a liquid circulation and waste liquid treatment subsystem, and a data acquisition and environmental parameter regulation and control feedback subsystem; inputting the prepared target solution into a settling chamber, selecting a spray dust falling or dust infiltration settling mode, testing the wettability of the dust under different temperature, concentration and pH conditions, naturally putting the dust into the settling chamber by adopting an air compression pump and a porous plate, capturing the settling state of the dust at any time through a laser sensor and a high-speed camera lens, and finishing settling to obtain the target solution. And the waste liquid is filtered. The system provides a full-automatic and high-precision solution for dust wettability testing, integrates the functions of environmental parameter regulation and control, dynamic monitoring and waste liquid treatment, is suitable for dust suppressant performance evaluation and dust wetting mechanism research in the fields of mines, environmental protection and the like, and realizes precise regulation and control of dust suppressant preparation.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of dust wettability testing, and specifically relates to a multi-parameter synergistic dust wettability intelligent regulation and testing system and method. BACKGROUND

[0002] Under the background of continuous acceleration of industrialization and urbanization, dust pollution has become a major challenge to global ecological environment and public health. As a country with industrial output value ranking among the top in the world, China's dust emission problems in the fields of mining, building material manufacturing, and construction are particularly prominent. According to the statistics of the Ministry of Ecology and Environment, industrial dust contributed about 15% of PM2.5 pollution load in 2022, and dust explosion accidents can cause serious property loss and casualties, directly threatening production safety and personnel health. At the same time, the annual new cases of occupational pneumoconiosis caused by dust are still high, highlighting the limitations of traditional prevention and control technology. At present, global environmental protection policies are becoming more stringent, and the "double carbon" target and green manufacturing concept have put forward higher requirements for dust control - not only to achieve efficient suppression, but also to accurately quantify dust wettability to optimize resource utilization. However, existing technologies mostly rely on single-parameter static testing, which is difficult to simulate real working conditions such as temperature and humidity fluctuations, dust suppressant concentration gradients, and other multi-factor coupling, resulting in significant deviation between dust suppression schemes and actual results, and coexistence of resource waste and secondary pollution risk. Under this background, the development of a dust wettability testing system with high precision, multi-parameter synergy, and intelligent regulation and control capability has become an urgent need to break through the industry bottleneck and promote green transformation.

[0003] Traditional dust suppression performance tests mainly rely on manual operation, such as dust immersion and sedimentation experiments that require manual recording. Such methods have significant defects: first, human error is large: dust and solution contact is not uniform, natural complete settlement to the bottom takes a long time, and timing is subjective; second, single function: unable to dynamically regulate environmental parameters, pH fluctuation, temperature fluctuation, liquid concentration gradient; third, data fragmentation, lack of systematic analysis of multi-factor interaction; fourth, traditional dust wettability testing equipment is relatively single and scattered, which brings inconvenience for long-term testing operation; fifth, dust spray dust suppression experiment consumes a large amount of dust, and the dust concentration accuracy is not high. Although some automated equipment has appeared in recent years, there are still problems such as few controllable variables, low testing precision, and rough waste liquid treatment, which cannot meet the needs of high-precision dust suppressant research and development and complex working condition adaptation.

[0004] With the development of intelligent sensing and automation technology, multi-parameter collaborative regulation technology provides a new idea for dust wettability testing. By integrating environmental simulation, dynamic monitoring and intelligent feedback, the dust-liquid interface behavior can be quantified comprehensively. However, the existing system still faces three major challenges: first, the coupling mechanism of multiple parameters (temperature, pH, concentration) is not clear, and there is a lack of standardized testing procedures; second, the uniformity of dust dispersion is difficult to guarantee, resulting in poor data repeatability; third, the waste liquid recycling and resource utilization technology lags behind, which is easy to cause secondary pollution and deviates from the green experiment concept.

[0005] Therefore, based on the above background, the present application provides an intelligent testing system and method for dust wettability by natural sedimentation method, which realizes multi-dimensional dynamic regulation of temperature, pH and dust suppressant concentration, dual mode of spray dust reduction and infiltration natural sedimentation, and verifies the technical bottleneck of uniform dispersion of dust and accurate determination of sedimentation endpoint by combining laser scattering method. At the same time, the waste liquid filtration and recovery system is integrated to promote the greenization of the testing process. The system provides a scientific tool for dust suppressant development, dust control process optimization and environmental policy making, and helps the transformation of industrial dust control from experience-driven to data-driven. SUMMARY

[0006] In view of the defects of single controllable parameter, significant human error and extensive waste liquid treatment in the existing dust wettability testing technology, the present application provides an intelligent testing system and method for dust wettability by natural sedimentation method, which aims to combine spray dust reduction and infiltration sedimentation experiment into one system with two modes, realizes high-precision quantitative analysis and green testing of dust wettability by dynamic coupling regulation of environmental parameters, uniform dispersion mechanism of dust and waste liquid recycling and purification technology. The specific content is as follows:

[0007] The intelligent testing system for dust wettability by natural sedimentation method includes liquid storage and liquid preparation subsystem, dust loading and sedimentation subsystem, liquid circulation and waste liquid treatment subsystem, data acquisition and environmental parameter regulation and feedback subsystem.

[0008] The liquid storage and liquid preparation subsystem includes a high-precision multi-channel peristaltic pump, a channel port I, a channel port II, a channel port III, a channel port IV, a liquid output pipeline I, a liquid output pipeline II, a liquid output pipeline III, a liquid output pipeline IV, a solenoid valve I, a solenoid valve II, a solenoid valve III, a solenoid valve IV, a static mixer, a pH sensor, a liquid preparation water outlet, a liquid preparation transportation pipeline, a solenoid valve V, a static mixer cover, an impeller shaft, a helical blade, a liquid storage tank I, a liquid storage water outlet I, a solenoid valve VI, a liquid storage output pipeline I, a liquid level sensor I, a liquid storage tank II, a liquid storage water outlet II, a solenoid valve VII, a liquid storage output pipeline II, a liquid level sensor II, a liquid storage tank III, a liquid storage water outlet III, a solenoid valve VIII, a liquid storage output pipeline III, a liquid level sensor III, a liquid storage tank IV, a liquid storage water outlet IV, a solenoid valve IX, a liquid storage output pipeline IV, and a liquid level sensor IV.

[0009] The dust loading and sedimentation subsystem includes a sedimentation chamber, a laser sensor, a temperature sensor, a water inlet I, a water conveying pipe I, an atomizing nozzle, an atomizing water pipe II, a liquid level sensor V, an atomizing water pipe I, an atomizing water pipe III, an atomizing water pipe IV, a multi-hole plate system, a sedimentation water outlet, a sedimentation water outlet pipe, a multi-hole plate, a sedimentation water inlet, a sedimentation water inlet pipe, a heater, a heating wire, a switch button I, a dust throwing instrument, a dust throwing hopper, a dust conveying air pipe, a data line I, a control switch button II, a stage I, an air-tight ring, a diffusion net, a small air compressor pump, a high-speed camera, a high-speed camera lens, a data line II, a telescopic rod, a stage II, a micro air pump, an air outlet micro-hole plate, an air outlet, an air conveying pipe, a sedimentation air inlet, a control switch button III, and a data line III.

[0010] The liquid circulation and waste liquid treatment subsystem includes a waste liquid treatment tank, a stainless steel filter screen, a ceramic membrane filter, a treated water outlet, a solenoid valve X, a treated water output pipeline, a waste liquid inlet, a waste liquid inlet pipeline, a solenoid valve XI, a ceramic membrane fixing ring, a ceramic membrane filter hole, a waste liquid pump, a vacuum air conveying pipeline, and a vacuum air inlet.

[0011] The data acquisition and environmental parameter control feedback subsystem includes a communication cable I, a data acquisition instrument, a communication cable II, a network switch, an uplink data line, a data processing analysis and feedback device, a downlink data line, a PLC controller, a communication cable III, a general solenoid valve, a special cable, and a brushless direct current servo motor.

[0012] The liquid storage and liquid preparation subsystem, the liquid storage tank I is transported to the high-precision multi-channel peristaltic pump through the liquid storage outlet I by the liquid storage output pipeline I, and is automatically controlled to be turned off by the electromagnetic valve VI, the liquid storage tank II is transported to the high-precision multi-channel peristaltic pump through the liquid storage outlet II by the liquid storage output pipeline II, and is automatically controlled to be turned off by the electromagnetic valve VII, the liquid storage tank III is transported to the high-precision multi-channel peristaltic pump through the liquid storage outlet III by the liquid storage output pipeline III, and is automatically controlled to be turned off by the electromagnetic valve VIII, the liquid storage tank IV is transported to the high-precision multi-channel peristaltic pump through the liquid storage outlet IV by the liquid storage output pipeline IV, and is automatically controlled to be turned off by the electromagnetic valve IX, the liquid storage tank I is provided with a liquid level sensor I, the liquid storage tank II is provided with a liquid level sensor II, the liquid storage tank III is provided with a liquid level sensor III, the liquid storage tank IV is provided with a liquid level sensor IV, the high-precision multi-channel peristaltic pump is transported to the static mixer through the channel port I, the channel port II, the channel port III and the channel port IV by the liquid storage output pipeline I, the liquid output pipeline II, the liquid output pipeline III and the liquid output pipeline IV respectively, and the liquid is automatically controlled to be transported by the electromagnetic valve I, the electromagnetic valve II, the electromagnetic valve III and the electromagnetic valve IV respectively, the static mixer receives the transported liquid, the solution prepared by the impeller shaft driving the spiral blade stirring is transported to the dust loading and sedimentation subsystem by the liquid output pipeline, and the liquid transport amount is automatically controlled by the electromagnetic valve V.

[0013] The liquid storage tank I, the liquid storage tank II, the liquid storage tank III and the liquid storage tank IV are four independent tanks, the material is polytetrafluoroethylene lined stainless steel, the volume of each tank is 3-5L, the liquid storage tank I is filled with high-concentration dust suppression solution, the liquid storage tank II is filled with tap water, the liquid storage tank III is filled with acid adjusting liquid, and the liquid storage tank IV is filled with alkaline adjusting liquid.

[0014] The high-precision multi-channel peristaltic pump has a flow range of 0.1-50ml / min, and an error of ±0.5%.

[0015] The liquid output pipeline I, the liquid output pipeline II, the liquid output pipeline III, the liquid output pipeline IV, the liquid storage output pipeline I, the liquid storage output pipeline II, the liquid storage output pipeline III, the liquid storage output pipeline IV, the liquid storage output pipeline I, the liquid output pipeline II, the liquid output pipeline III and the liquid output pipeline IV are all made of silica gel material, and the inner diameter is 8mm.

[0016] The static mixer has a volume of 5-10L and is made of polytetrafluoroethylene lined stainless steel.

[0017] The dust loading and settling subsystem, the outer sidewall of the settling chamber is provided with a laser sensor, a liquid level sensor V and a temperature sensor, the inner top is provided with atomizing nozzles, the solution is supplied to the outer ring atomizing nozzles through the water inlet I, the water delivery pipe I, the atomizing water inlet pipe I, the atomizing water inlet pipe II, the solution is supplied to the inner ring atomizing nozzles through the atomizing water inlet pipe III and the atomizing water inlet pipe IV, the bottom is provided with a heater for heating the solution through heating wires, the temperature sensor controls the temperature rise, the upper part of the heater is provided with a multi-hole plate system, the settling solution flows into the settling chamber through the multi-hole plate from the settling water inlet pipe, the amount of solution is controlled by the liquid level sensor V, the left side of the outside of the settling chamber is provided with a dust throwing instrument, the dust to be tested is added through the dust throwing hopper, the dust is blown away by the small air compressor pump and then thrown into the settling chamber through the dust conveying pipe, the end of the dust conveying pipe is provided with a diffusion net and an air tight seal ring, the bottom of the dust conveying pipe is connected with the object table I, the right side of the outside of the settling chamber is provided with a micro air pump, air is blown upward through the air outlet micro hole plate, the air conveying pipe is connected with the settling air inlet, and air is blown upward through the multi-hole plate, the high-speed camera is connected with the telescopic rod on the left side of the outside, the telescopic rod is connected with the object table II, the outside of the multi-hole plate system is provided with a settling water outlet, and the waste liquid is conveyed to the liquid circulation and waste liquid treatment subsystem through the settling water outlet pipe.

[0018] The material of the settling chamber is transparent acrylic, the wall thickness is 5mm, the diameter is 40cm, and the height is 60cm.

[0019] The pore diameter of the multi-hole plate is 0.5mm, the hole spacing is 2mm, and the material is transparent acrylic.

[0020] The temperature control range of the heater is 5-60℃, and the precision is ±0.3℃.

[0021] The temperature sensor is a PT100 temperature sensor, which monitors the temperature of the solution in the settling chamber in real time, and the fluctuation range is ±0.5℃.

[0022] The dust throwing hopper has a capacity of 500-1000g, and the dust is quantitatively thrown with an error of less than 0.1g.

[0023] The diffusion net added at the end of the dust conveying pipe is a stainless steel mesh with a mesh number of 80; the flow of the micro air pump is controlled at 0.5-2L / min.

[0024] The liquid circulation and waste liquid treatment subsystem, the double-layer filter layer is arranged in the middle of the waste liquid treatment tank, the upper layer is provided with a stainless steel filter screen, the lower layer is provided with a ceramic membrane filter, the top is provided with a waste liquid inlet, the waste liquid is conveyed through the waste liquid inlet pipeline, the electromagnetic valve XI is arranged on the waste liquid inlet pipeline to control the closing and stopping, the bottom is provided with a treated water outlet and a treated water output pipeline, the electromagnetic valve X is arranged on the treated water output pipeline to control the closing and stopping, and the waste liquid treatment tank and the waste liquid pump are connected through the vacuum air conveying port by the vacuum air conveying pipeline.

[0025] The double-layer filter layer, the upper layer of stainless steel filter screen is 316L stainless steel porous plate, the thickness is 3mm, the surface is polished with Ra<0.2um, the aperture is 0.5mm, and the purpose is to intercept large particles; the lower layer of ceramic membrane filter element is corundum tube, the outer diameter is 60mm, the inner diameter is 40mm, the aperture is 0.2-10um, and the purpose is to remove fine particles, and the double-layer filter layer is designed to be detachable, so that cleaning and maintenance are facilitated.

[0026] The data acquisition and environmental parameter control feedback subsystem, the data monitored by the high-precision multi-channel peristaltic pump, the liquid level sensor I, the liquid level sensor II, the liquid level sensor III, the liquid level sensor IV, the static mixer and the settling chamber are transmitted to the data acquisition instrument through the communication cable I, the collected data is uploaded to the network switch through the communication cable II, and then the data is transmitted to the data processing analysis and feedback device through the uplink data line, the processed data is transmitted to the PLC controller through the downlink data line, the PLC controller is connected with the brushless direct current servo motor through the special cable, and the processed data is transmitted to the total electromagnetic valve through the communication cable III.

[0027] The data processing analysis and feedback device comprises a plurality of monitoring software models, each software model adopts a subsystem structure, and each subsystem can independently execute different monitoring function modes.

[0028] The PLC controller is of a subsystem structure, pre-stores operation instructions in the inside, controls the opening and closing degree of the liquid delivery and the pipeline electromagnetic valve through digital input and output, and adjusts the liquid concentration and pH value.

[0029] The specific steps of the intelligent test method of the dust wettability natural sedimentation method are as follows:

[0030] (1) Preparation of dust suppression solution

[0031] The prepared high-concentration dust suppression solution 1-2L is loaded in the liquid storage tank I, and 2-4L tap water is loaded in the liquid storage tank II. The high-precision multi-channel peristaltic pump is used to set the target dust suppression solution concentration. The high-precision multi-channel peristaltic pump extracts liquid from the liquid storage tank I and the liquid storage tank II by proportion, and the liquid is output through the liquid output pipeline I and the liquid output pipeline II to the high-precision multi-channel peristaltic pump through the liquid outlet I and the liquid outlet II, and is automatically controlled to be turned off by the electromagnetic valve VI and the electromagnetic valve VII. Then, the liquid is output to the static mixer through the channel port I and the channel port II by the liquid output pipeline I and the liquid output pipeline II, respectively, and the impeller shaft drives the spiral blade to stir. The pH sensor built-in the static mixer reads the pH value in real time. If it is necessary to adjust to the experimental target pH value, the system links the high-precision multi-channel peristaltic pump to output the liquid from the liquid storage tank III and the liquid storage tank IV through the liquid outlet III and the liquid outlet IV to the high-precision multi-channel peristaltic pump through the liquid output pipeline IV, and then the liquid is output to the static mixer through the channel port II and the channel port III by the liquid output pipeline III and the liquid output pipeline IV, respectively. The prepared target solution is output through the liquid outlet, and is output to the settling chamber through the liquid transportation pipeline.

[0032] (2) Dust loading and settling

[0033] The data processing and analysis and feedback device selects a wetting test mode. If the spray dust suppression mode is selected, the prepared dust suppression solution is input into the spray system through the water inlet I and the water output pipeline I. The pretreated dust is put into the dust injection instrument through the sealed dust feeding bucket according to the preset mass. The dust is sent into the settling chamber through the dust feeding air pipe by the small air compressor pump. The airflow generated by the micro air pump at the bottom of the settling chamber is input into the settling chamber through the air inlet pipe by the air output pipeline. The airflow is blown upward through the bottom perforated plate at a flow rate of 0.5L / min, and the blowing lasts for 10 seconds to prevent the dust from accumulating to form a “dead zone”. When the dust concentration reaches a stable state, the spray system is started to wet the dust, so that the dust is condensed and naturally settled. If the immersion natural settling mode is selected, the prepared dust suppression solution is input into the perforated plate system through the settling water inlet and the settling water input pipeline. The solution is input into the settling chamber through the perforated plate. The amount of the solution is determined by the liquid level sensor V. The target temperature of the dust suppression solution is set, and the heating wire is used for preset heating. Then, the dust is put in according to the same dust feeding mode of the spray dust suppression mode. The dust is contacted with the dust suppression solution and is immersed to completely settle in a natural settling manner.

[0034] (3) Liquid circulation and waste liquid treatment

[0035] After the dust settling is completed, the electromagnetic valve XI is opened, and the liquid in the settling chamber is pumped to the waste liquid treatment tank through the waste liquid inlet pipe by the waste liquid pump, and the treated solution is classified and stored after being filtered by the stainless steel filter screen and the ceramic membrane filter; the data processing analysis and feedback device automatically generates a report, integrates the transmittance curve, settling time and environmental parameters, and outputs a PDF / Excel format report, and exports the dust settling state image of the system at each time.

[0036] The dust in the dust loading and settling step is pre-treated by using an ultrasonic vibrating screen to screen the dust to a target particle size of 75-150 μm, and the aperture of the ultrasonic vibrating screen is adjustable in a range of 50-200 μm, and then the screened dust is placed in a 60℃ vacuum drying box for pretreatment for 24 hours.

[0037] The laser sensor and high-speed camera lens capture the dust infiltration and settling state at all times during the dust loading and settling process, and finally output in the form of images, the laser scattering sensor is arranged in a horizontal array in the middle of the settling cabin, and the transmittance change is monitored in real time, the wavelength is 650 nm, when the transmittance is greater than or equal to 95%, the settling endpoint is determined, the system automatically records the time, and the error is less than 0.1s.

[0038] The heater heating temperature range during the dust loading and settling process is 5-60℃, and the temperature sensor is a PT100 temperature sensor, which monitors the temperature in real time, and the fluctuation range is ±0.5℃.

[0039] After the waste liquid is completely transported to the waste liquid treatment tank in the liquid circulation and waste liquid treatment step, pipeline flushing is performed, 200ml of deionized water is injected, the pipeline is circulated and flushed for 10 seconds to prevent residual pollution, a high-precision multi-channel peristaltic pump is used to re-inject new liquid according to the setting, and the injection amount is controlled by the liquid level sensor V; the environmental parameters are temperature and pH concentration.

[0040] Compared with the prior art, the present application has the following innovations:

[0041] (1) Multi-parameter cooperative regulation and intelligent multi-subsystem test system integration. The present application innovatively integrates temperature, pH, dust suppressant concentration and other environmental parameters, dust uniform dispersion and settling monitoring, waste liquid circulation treatment and other subsystems into one, and builds a full-process automatic test system. At the same time, the spray dust reduction and infiltration natural settling modes are integrated into one system, which can be selected for experiment, and the amount of dust and solution can be greatly saved. Through intelligent control subsystem, the system collects and analyzes the transmittance and environmental parameters in the dust wetting process in real time, automatically optimizes the experimental conditions, dynamically adjusts the airflow disturbance intensity and liquid proportioning, realizes the precise quantification of the wetting performance under the coupling action of multiple factors, and improves the test efficiency by more than 50%.

[0042] (2) Dust uniform dispersion and dynamic monitoring technology innovation. In the design of dust loading and dispersion mechanism, the invention proposes a "air compression-air flow-multi-hole plate" collaborative dispersion technology. The combination of dust injection instrument, air compression pump and bottom multi-hole plate air flow disturbance ensures the uniformity of dust layer covering the liquid surface with a thickness deviation of less than 5%. At the same time, based on the dual verification mechanism of laser scattering sensor array and high-speed camera, the intelligent judgment of sedimentation endpoint is realized for the first time, with a judgment error of less than 0.1 second, which completely eliminates the unevenness and timing error of manual dust injection.

[0043] (3) Dust suppressant concentration closed-loop liquid preparation and waste liquid green recycling technology. The invention designs a multi-channel dust suppressant liquid preparation subsystem, which controls the mixing ratio of stock solution and diluent through double peristaltic pumps with an accuracy of ±0.1% and supports dynamic adjustment of concentration gradient of 0.1%-5.0%. For the problem of waste liquid treatment, a "stainless steel filter screen + ceramic membrane" multi-stage filtration system is developed, which combines waste liquid classification storage and reuse function, making the chemical reagent recovery rate exceed 90%, reducing resource waste and secondary pollution risk.

[0044] (4) Subsystem scalable design and industrial adaptability innovation. The hierarchical subsystem structure design supports function expansion, such as adding gas environment simulation unit or high-throughput parallel test subsystem. The system is compatible with mine dust, industrial fly ash, building dust and other types of sample testing, meeting the dual needs of laboratory research and enterprise production line dust suppression process optimization.

[0045] The above innovations through technology cooperation and intelligent upgrading have overcome the bottlenecks of traditional test methods such as parameter isolation, significant error and occupation of a large number of subjective factors. The test solution can test the natural sedimentation velocity of dust under different temperature, concentration and pH conditions, and also test the spray dust suppression efficiency, providing a high-precision, intelligent and green systematic solution for dust wettability research, and promoting the intelligent and precise development of industrial dust control. BRIEF DESCRIPTION OF DRAWINGS

[0046] Figure 1 is a schematic diagram of a multi-parameter collaborative dust wettability intelligent regulation and control test system;

[0047] Figure 2 is a schematic diagram of a liquid storage and liquid preparation subsystem;

[0048] Figure 3 is a front view schematic diagram of a static mixer;

[0049] Figure 4 is a dust loading and sedimentation subsystem schematic diagram;

[0050] Figure 5 is a spray system top view;

[0051] Figure 6 Figure 1 is a schematic diagram of the liquid circulation and waste liquid treatment subsystem;

[0052] Figure 7 Figure 4 is a top view of the ceramic membrane filter;

[0053] Figure 8 Figure 7 is a schematic diagram of the data acquisition and environmental parameter regulation feedback subsystem;

[0054] Figures 1-8System, B—Dust loading and sedimentation subsystem, C—Liquid circulation and waste liquid treatment subsystem, D—Data acquisition and environmental parameter control feedback subsystem, 1-1—High-precision multi-channel peristaltic pump, 1-2—Channel port I, 1-3—Channel port II, 1-4—Channel port III, 1-5—Channel port IV, 1-6—Liquid output pipeline I, 1-7—Liquid output pipeline II, 1-8—Liquid output pipeline III, 1-9—Liquid output pipeline IV, 1-10—Solenoid valve I, 1-11—Solenoid valve II, 1-12—Solenoid valve III, 1-13—Solenoid valve IV, 2-1—Static mixer, 2-2—pH sensor, 2-3—Liquid preparation outlet, 2-4—Liquid preparation transport pipeline, 2-5—Solenoid valve V, 2-6—Static mixer cover, 2-7—Impeller shaft, 2-8—Spiral blade, 3-1—Liquid storage tank I, 3-2—Liquid storage outlet I, 3-3—Solenoid valve VI, 3-4—Liquid storage output pipeline I, 3-5—Liquid level sensor I, 4-1—Liquid storage tank II, 4-2—Liquid storage outlet II, 4-3—Solenoid valve VII, 4-4—Liquid storage output pipeline II, 4-5—Liquid level sensor II, 5-1—Liquid storage tank III, 5-2—Liquid storage outlet III, 5-3—Solenoid valve VIII, 5-4—Liquid storage output pipeline III, 5-5—Liquid level sensor III, 6-1—Liquid storage tank IV, 6-2—Liquid storage outlet IV, 6-3—Solenoid valve IX, 6-4—Liquid storage output pipeline IV, 6-5—Liquid level sensor IV, 7-1—Sedimentation chamber, 7-2—Laser sensor, 7-3—Temperature sensor, 7-4—Water inlet I, 7-5—Water transport pipe I, 7-6—Atomizing nozzle, 7-7—Atomizing water inlet pipe II, 7-8—Liquid level sensor V, 7-9—Atomizing water inlet pipe I, 7-10—Atomizing water inlet pipe III, 7-11—Atomizing water inlet pipe IV, 8-1—Multi-hole plate system, 8-2—Sedimentation water outlet, 8-3—Sedimentation water pipe, 8-4—Multi-hole plate, 8-5—Sedimentation water inlet, 8-6—Sedimentation water pipe, 9-1—Heater, 9-2—Heating wire, 9-3—Switch button I, 10-1—Dust injector, 10-2—Dust feeding hopper, 10-3—Dust feeding air pipe, 10-4—Data line I, 10-5—Control switch button II, 10-6—Stage I, 10-7—Air-tight seal ring, 10-8—Diffusion net, 10-9—Small air compression pump, 11-1—High-speed camera, 11-2—High-speed camera lens, 11-3—Data line II, 11-4—Telescopic rod, 11-5—Stage II, 12-1—Mini air pump, 12-2—Air outlet micro-hole plate, 12-3—Air outlet, 12-4—Air transport pipe, 12-5—Sedimentation air inlet, 12-6—Control switch button III, 12-7—Data line III, 13-1—Waste liquid treatment tank, 13-2—Stainless steel filter screen, 13-3—Ceramic membrane filter, 13-4—Treated water outlet, 13-5—Solenoid valve X, 13-6—Treated water output pipeline, 13-7—Waste liquid inlet, 13-8—Waste liquid inlet pipeline,13-9 - solenoid valve XI, 13-10 - ceramic membrane fixed ring, 13-11 - ceramic membrane filter hole, 13-12 - vacuum gas pipeline, 13-13 - vacuum gas port, 14 - waste liquid pump, 15 - communication cable I, 16 - data acquisition instrument, 17 - communication cable II, 18 - network switch, 19 - uplink data line, 20 - data processing analysis and feedback device, 21 - downlink data line, 22 - PLC controller, 23 - communication cable III, 24 - total solenoid valve, 25 - special cable, 26 - brushless DC servo motor. DETAILED DESCRIPTION

[0055] In order to make the purpose, technical scheme and advantages of the present application more clear and simple, the present application is further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application and do not limit the present application.

[0056] As shown in Figure 1 , the multi-parameter collaborative dust wettability intelligent regulation and control test system includes a liquid storage and liquid preparation subsystem A, a dust loading and sedimentation subsystem B, a liquid circulation and waste liquid treatment subsystem C, a data acquisition and environmental parameter regulation and feedback subsystem D, and the system is sequentially connected according to the order of the subsystems.

[0057] First, as Figure 2 , Figure 3As shown, by 4 independent tank, material for polytetrafluoroethylene lining stainless steel, each tank volume of 3 ~ 5L high concentration of dust suppression solution liquid storage tank I 3-1, storage tank II 4-1, storage tank III 5-1, storage tank IV 6-1, respectively by the storage tank outlet I 3-2, storage tank outlet II 4-2, storage tank outlet III 5-2, storage tank outlet IV 6-2 by the liquid output pipeline I 3-4, liquid output pipeline II 4-4, liquid output pipeline III 5-4, liquid output pipeline IV 6-4 to the flow range 0.1 ~ 50ml / min, error ±0.5% high precision multi-channel peristaltic pump 1-1, 4 liquid output pipeline is respectively provided with solenoid valve VI 3-3, solenoid valve VII 4-3, solenoid valve VIII 5-3, solenoid valve IX 6-3 automatic control stop, liquid level sensor I 3-5 is arranged in the liquid storage tank I 3-1, liquid level sensor II 4-5 is arranged in the liquid storage tank II 4-1, liquid level sensor III 5-5 is arranged in the liquid storage tank III 5-1, liquid level sensor IV 6-5 is arranged in the liquid storage tank IV 6-1, high precision multi-channel peristaltic pump 1-1 through the channel I 1-2, channel II 1-3, channel III 1-4 and channel IV 1-5, respectively by the liquid output pipeline I 1-6, liquid output pipeline II 1-7, liquid output pipeline III 1-8 and liquid output pipeline IV 1-9 to the volume of 5 ~ 10L, material for polytetrafluoroethylene lining stainless steel static mixer 2-1, respectively by solenoid valve I 1-10, solenoid valve II 1-11, solenoid valve III 1-12 and solenoid valve IV 1-13 automatic control liquid delivery, static mixer 2-1 receives the liquid, the impeller shaft 2-7 driven by spiral blade 2-8 stirring solution, static mixer 2-1 is provided with pH sensor 2-2, the pH of the prepared solution is adjusted by pH sensor 2-2, the prepared solution is transported to the dust loading and sedimentation subsystem B through the liquid output pipeline 2-4 by the liquid output pipeline 2-4, and the liquid delivery amount is automatically controlled by solenoid valve V 2-5; the liquid output pipeline I (1-6), the liquid output pipeline II (1-7), the liquid output pipeline III (1-8), the liquid output pipeline IV (1-9), the liquid output pipeline I (3-4), the liquid output pipeline II (4-4), the liquid output pipeline III (5-4), the liquid output pipeline IV (6-4), the liquid output pipeline I (1-6), the liquid output pipeline II (1-7), the liquid output pipeline III (1-8), the liquid output pipeline IV (1-9) are all made of silica gel material, and the inner diameter is 8mm.

[0058] Secondly, as Figure 4 , Figure 5As shown, the material is transparent acrylic, the wall thickness is 5mm, the diameter is 40cm, the height is 60cm, the outside side wall of the settling chamber 7-1 is provided with a laser sensor 7-2, a liquid level sensor V 7-8 and a temperature sensor 7-3, the top inside is provided with an atomizing nozzle 7-6, the water is transported to the atomizing water pipe I 7-9 through the water inlet I 7-4, the water pipe I 7-5, and then to the atomizing water pipe II 7-7 to supply solution to the outer circle atomizing nozzle, and then to the atomizing water pipe III 7-10 to the atomizing water pipe IV 7-11 to supply solution to the inner circle atomizing nozzle, the bottom is provided with a heater 9-1 with a temperature control range of 5-60℃ and a precision of ±0.3℃, which heats the solution through the heating wire 9-2, and the temperature sensor 7-3 controlled by the PT100 temperature sensor with a fluctuation range of ±0.5℃ controls the temperature rise, and the upper part of the heater 9-1 is provided with a porous plate system 8-1, which makes the settling solution flow into the settling chamber 7-1 through the porous plate 8-4 with a material of transparent acrylic, a pore size of 0.5mm and a hole spacing of 2mm by the settling water inlet 8-5 through the settling water pipe 8-6, and the solution amount is controlled by the liquid level sensor V 7-8, the left side of the outside of the settling chamber 7-1 is provided with a dust thrower 10-1, and the dust to be tested is added by the dust adding hopper 10-2 with a capacity of 500-1000g, and the dust is blown away by the small air compressor pump 10-9 and then thrown into the settling chamber 7-1 through the dust conveying pipe 10-3, the end of the dust conveying pipe 10-3 is provided with a stainless steel mesh, a diffusion mesh 10-8 with a mesh of 80 meshes and an air-tight ring 10-7, the bottom of the dust conveying pipe 10-3 is connected with the object table I 10-6, the right side of the outside of the settling chamber 7-1 is provided with a micro air pump 12-1 with a flow control of 0.5-2L / min, which blows air through the air outlet microporous plate 12-2, the gas conveying pipe 12-4 is connected with the settling air inlet 12-5, and then blows air upward through the porous plate 8-4, the left side of the outside is provided with a high-speed camera 11-1 connected with an extension rod 11-4, the extension rod is connected with the object table II 11-5, the outside of the porous plate system 8-1 is provided with a settling water outlet 8-2, which transports the waste liquid to the liquid circulation and waste liquid treatment subsystem C through the settling water pipe 8-3.

[0059] Then, as Figure 6 、 Figure 7As shown, the middle of the waste liquid treatment tank 13-1 is provided with a double-layer filter layer, the upper layer is provided with a 316L stainless steel perforated plate, the thickness is 3mm, the surface is polished with Ra<0.2μm, the aperture is 0.5mm, the lower layer is provided with a filter core, the outer diameter is 60mm, the inner diameter is 40mm, the aperture is 0.2-10μm, the ceramic membrane filter 13-3 is designed to be detachable, the top is provided with a waste liquid inlet 13-7, which is transported through a waste liquid inlet pipeline 13-8, the waste liquid inlet pipeline 13-8 is provided with a solenoid valve XI 13-9 to control the stop, the bottom is provided with a treated water outlet 13-4 and a treated water output pipeline 13-6, the treated water output pipeline 13-6 is provided with a solenoid valve X 13-5 to control the stop, the waste liquid treatment tank 13-1 is connected with the waste liquid pump 14 through the vacuum gas conveying port 13-13 by the vacuum gas conveying pipeline 13-12.

[0060] Finally, as shown in Figure 8 The data monitored by the high-precision multi-channel peristaltic pump 1-1, the liquid level sensor I 3-5, the liquid level sensor II 4-5, the liquid level sensor III 5-5, the liquid level sensor IV 6-5, the static mixer 2-1 and the settling chamber 7-1 are transmitted to the data acquisition instrument 16 through the communication cable I 15, the collected data are uploaded to the network switch 18 through the communication cable II 17, and then the data are transmitted to the data processing and feedback device 20 through the uplink data line 19, the processed data are transmitted to the PLC controller 22 through the downlink data line 21, the PLC controller 22 is connected with the brushless direct-current servo motor 26 through the special cable 25, and the PLC controller 22 transmits the processed data to the total solenoid valve 24 through the communication cable III 23; the data processing and feedback device 20 comprises a plurality of monitoring software models, each software model adopts a subsystem structure, and each subsystem can independently execute different monitoring function modes; the PLC controller 22 is of a subsystem structure, pre-stores operation instructions in the inside, controls the opening and closing degree of the liquid conveying and pipeline solenoid valve through digital input and output, and adjusts the liquid concentration and pH value.

[0061] After the system is connected, the intelligent test method for the natural sedimentation method of dust wettability is as follows:

[0062] First, according to the target conditions to prepare dust suppression solution. Preparation of high concentration dust suppression solution stock solution 1-2L in storage tank I 3-1, connected to 2-4L tap water in storage tank II 4-1, by high precision multi-channel peristaltic pump 1-1 set target dust suppression solution concentration, high precision multi-channel peristaltic pump 1-1 from storage tank I 3-1 and storage tank II 4-1 by extracting liquid by proportion through the liquid outlet I 3-2, liquid outlet II 4-2 by storage output pipeline I 3-4, storage output pipeline II 4-4 respectively to high precision multi-channel peristaltic pump 1-1, and by solenoid valve VI 3-3, solenoid valve VII 4-3 automatic control off, then through the channel I 1-2, channel II 1-3 by liquid output pipe I 1-6, liquid output pipe II 1-7 respectively to static mixer 2-1, open impeller shaft 2-7 driven by spiral blade 2-8 for stirring; static mixer 2-1 built-in pH sensor 2-2 real-time reading of pH, if need to adjust to the experimental target pH value, the system linkage high precision multi-channel peristaltic pump 1-1 from storage tank III 5-1 and storage tank IV 6-1 respectively by liquid outlet III 5-2 and liquid outlet IV 6-2 by storage output pipeline IV 6-4 to high precision multi-channel peristaltic pump 1-1, then through the channel II 1-3 and channel III 1-4 by liquid output pipe III 1-8 and liquid output pipe IV 1-9 respectively to static mixer 2-1, the prepared target solution through the liquid outlet 2-3, by liquid transport pipeline 2-4 to the settling chamber 7-1.

[0063] Then dust loading and natural settlement. First, the dust is pretreated, and the ultrasonic vibrating screen is used to screen the dust to the target particle size of 75-150 μm, the aperture of the ultrasonic vibrating screen is adjustable between 50-200 μm, the screened dust is dried in a vacuum drying oven at 60°C for 24 hours, the data processing analysis and feedback device 14-6 selects the wetting test mode, if the spray dust reduction mode is selected, the prepared dust suppression solution is input into the spray system through the water inlet I 7-4 by the water pipe I 7-5, the pretreated dust is put into the dust dropping instrument 10-1 according to the preset mass through the sealed dust dropping hopper 10-2, the dust is sent into the settling chamber 7-1 through the dust sending pipe 10-3 by the small air compressor pump 10-9, the generated airflow is input into the settling chamber 7-1 through the settling air inlet 12-5 by the air pipe 12-4 by the micro air pump 12-1 at the bottom, the airflow is blown upward at a flow rate of 0.5 L / min through the bottom perforated plate 8-4, and the spraying system is started to wet the dust when the dust concentration reaches a stable state, so that the dust is condensed and naturally settled; if the immersion natural settlement mode is selected, the prepared dust suppression solution is input into the perforated plate system 8-1 through the settling water inlet 8-5 by the settling water pipe 8-6, and then input into the settling chamber 7-1 through the perforated plate 8-4, the amount of solution is determined by the liquid level sensor V 7-8, the target temperature of the dust suppression solution is set, the heating wire 9-2 is used for preset heating, and then the dust is put in the same way, the dust is contacted with the dust suppression solution in a natural settlement mode, and the dust is completely settled by immersion, the laser sensor and high-speed camera lens capture the dust immersion settlement state at all times during the dust loading and settlement process in the two modes, and finally output in the form of images, the laser scattering sensor is arranged in the middle of the settling cabin in a horizontal array, and the light transmittance is monitored in real time, the wavelength is 650 nm, and when the light transmittance is ≥95%, the settling endpoint is determined, the system automatically records the time, and the error is <0.1 s.

[0064] Finally, the waste liquid is treated and new liquid is re-injected. After the dust settlement is completed, the electromagnetic valve XI 13-9 is opened, the liquid in the settling chamber 7-1 is pumped to the waste liquid treatment tank 13-1 through the waste liquid inlet 13-7 by the waste liquid inlet pipe 13-8 by the waste liquid pump 14, and the treated solution is classified and stored after being filtered by the stainless steel filter screen 13-2 and the ceramic membrane filter 13-3, after the waste liquid is completely transported to the waste liquid treatment tank 13-1, the pipeline is flushed, 200 ml of deionized water is injected, the pipeline is circulated and flushed for 10 seconds, the high-precision multi-channel peristaltic pump 1-1 is used for re-injection of new liquid according to the setting, and the injection amount is controlled by the liquid level sensor V 7-8; the experimental data processing analysis and feedback device 20 automatically generates a report, integrates the light transmittance curve, the settling time, the environmental parameters, the environmental parameters are the temperature and the pH concentration, and outputs a PDF / Excel format report, and the settling state image of the system dust at each time is exported.

[0065] In the description of the invention, it needs to be understood that the terms "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the patent of the invention.

[0066] In the invention, unless otherwise explicitly specified and limited, the terms "provided with", "mounted", "connected" and the like should be understood broadly, for example, can be fixedly connected, can be detachably connected; can be mechanically connected; can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the patent of the invention can be understood according to the specific circumstances.

[0067] It needs to be further explained that the specific embodiments described herein are only examples of the spirit of the invention. Those skilled in the art of the invention can make various modifications or supplements to the described specific embodiments, or replace them with similar ways, but will not deviate from the spirit of the invention or the scope defined by the claims.

Claims

1. An intelligent testing system for the natural settling method of dust wettability, characterized in that: It includes a liquid storage and dispensing subsystem (A), a dust loading and settling subsystem (B), a liquid circulation and waste liquid treatment subsystem (C), and a data acquisition and environmental parameter control feedback subsystem (D). The liquid storage and dispensing subsystem (A) includes a high-precision multi-channel peristaltic pump (1-1), channel port I (1-2), channel port II (1-3), channel port III (1-4), channel port IV (1-5), liquid output pipe I (1-6), liquid output pipe II (1-7), liquid output pipe III (1-8), liquid output pipe IV (1-9), solenoid valve I (1-10), solenoid valve II (1-11), solenoid valve III (1-12), solenoid valve IV (1-13), static mixer (2-1), pH sensor (2-2), dispensing outlet (2-3), dispensing transport pipe (2-4), solenoid valve V (2-5), static mixer cover (2-6), and impeller shaft (2). -7), spiral blade (2-8), storage tank I (3-1), storage outlet I (3-2), solenoid valve VI (3-3), storage output pipe I (3-4), liquid level sensor I (3-5), storage tank II (4-1), storage outlet II (4-2), solenoid valve VII (4-3), storage output pipe II (4-4), liquid level sensor II (4-5), storage tank III (5-1), storage outlet III (5-2), solenoid valve VIII (5-3), storage output pipe III (5-4), liquid level sensor III (5-5), storage tank IV (6-1), storage outlet IV (6-2), solenoid valve IX (6-3), storage output pipe IV (6-4), liquid level sensor IV (6-5); The dust loading and settling subsystem (B) includes a settling chamber (7-1), a laser sensor (7-2), a temperature sensor (7-3), a water inlet I (7-4), a water supply pipe I (7-5), an atomizing nozzle (7-6), an atomizing water inlet pipe II (7-7), a liquid level sensor V (7-8), an atomizing water inlet pipe I (7-9), an atomizing water inlet pipe III (7-10), an atomizing water inlet pipe IV (7-11), a perforated plate system (8-1), a settling outlet (8-2), a settling outlet pipe (8-3), a perforated plate (8-4), a settling inlet (8-5), a settling inlet pipe (8-6), a heater (9-1), a heating wire (9-2), a switch button I (9-3), and a dust collector (7-1). 10-1), Dust hopper (10-2), Dust conveying duct (10-3), Data cable I (10-4), Control switch button II (10-5), Platform I (10-6), Air seal ring (10-7), Diffusion net (10-8), Small air compressor pump (10-9), High-speed camera (11-1), High-speed camera lens (11-2), Data cable II (11-3), Telescopic rod (11-4), Platform II (11-5), Miniature air pump (12-1), Air outlet micro-perforated plate (12-2), Air outlet (12-3), Air supply pipe (12-4), Settling air inlet (12-5), Control switch button III (12-6), Data cable III (12-7); The liquid circulation and waste liquid treatment subsystem (C) includes a waste liquid treatment tank (13-1), a stainless steel filter screen (13-2), a ceramic membrane filter (13-3), a treated water outlet (13-4), a solenoid valve X (13-5), a treated water output pipe (13-6), a waste liquid inlet (13-7), a waste liquid inlet pipe (13-8), a solenoid valve XI (13-9), a ceramic membrane fixing ring (13-10), a ceramic membrane filter hole (13-11), a waste liquid pump (13-12), a vacuum gas supply pipe (13-13), and a vacuum gas supply port (13-14). The data acquisition and environmental parameter control feedback subsystem (D) includes communication cable I (15), data acquisition instrument (16), communication cable II (17), network switch (18), uplink data line (19), data processing analysis and feedback device (20), downlink data line (21), PLC controller (22), communication cable III (23), main solenoid valve (24), dedicated cable (25), and brushless DC servo motor (26).

2. The intelligent testing system for the natural settling method of dust wettability according to claim 1, characterized in that, In the liquid storage and dispensing subsystem (A), liquid storage tank I (3-1) is supplied to the high-precision multi-channel peristaltic pump (1-1) via liquid storage outlet I (3-2) and liquid storage output pipe I (3-4), and is automatically shut down by solenoid valve VI (3-3). Liquid storage tank II (4-1) is supplied to the high-precision multi-channel peristaltic pump (1-1) via liquid storage outlet II (4-2) and liquid storage output pipe II (4-4), and is automatically shut down by solenoid valve VII (4-3). Liquid storage tank III (5-1) is supplied to the high-precision multi-channel peristaltic pump (1-1) via liquid storage outlet III (5-2) and liquid storage output pipe III (5-4), and is automatically shut down by solenoid valve VIII (5-4). 3) Automatic shutdown control: Liquid storage tank IV (6-1) is supplied to the high-precision multi-channel peristaltic pump (1-1) through liquid outlet IV (6-2) and liquid output pipe IV (6-4), and is automatically shut down by solenoid valve IX (6-3). Liquid storage tank I (3-1) is equipped with liquid level sensor I (3-5), liquid storage tank II (4-1) is equipped with liquid level sensor II (4-5), liquid storage tank III (5-1) is equipped with liquid level sensor III (5-5), and liquid storage tank IV (6-1) is equipped with liquid level sensor IV (6-5). The high-precision multi-channel peristaltic pump (1-1) supplies liquid through channel I (1-2), channel II (1-3), channel III (1-4), and channel IV. (1-5) Liquid is delivered to the static mixer (2-1) via liquid storage output pipe I (1-6), liquid output pipe II (1-7), liquid output pipe III (1-8), and liquid output pipe IV (1-9), respectively. The liquid delivery is automatically controlled by solenoid valves I (1-10), II (1-11), III (1-12), and IV (1-13), respectively. The static mixer (2-1) receives the delivered liquid and stirs the prepared solution by driving the spiral blades (2-8) through the impeller shaft (2-7). The pH of the prepared solution is adjusted by the pH sensor (2-2). The prepared solution is then delivered through the solution outlet (2-3) via the solution delivery pipe. (2-4) The liquid is transported to the dust loading and settling subsystem (B), and the liquid delivery volume is automatically controlled by solenoid valve V (2-5). The storage tanks I (3-1), II (4-1), III (5-1), and IV (6-1) are four independent tanks, made of polytetrafluoroethylene lined with stainless steel, each with a volume of 3-5L. Storage tank I (3-1) contains high-concentration dust suppression solution stock solution, storage tank II (4-1) contains tap water, storage tank III (5-1) contains acidic conditioning solution, and storage tank IV (6-1) contains alkaline conditioning solution. The high-precision multi-channel peristaltic pump (1-1) has a flow range of 0.1-50ml / min and an error of ±0.5%; the liquid output pipes I (1-6), II (1-7), III (1-8), IV (1-9), and storage output pipes I (3-4), II (4-4), III (5-4), and IV (6-4), and storage output pipes I (1-6), II (1-7), III (1-8), and IV (1-9) are all made of silicone and have an inner diameter of 8mm; the static mixer (2-1) has a volume of 5-10L and is made of polytetrafluoroethylene lined with stainless steel.

3. The intelligent testing system for the natural settling method of dust wettability according to claim 1, characterized in that, The dust loading and settling subsystem B has a laser sensor (7-2), a liquid level sensor V (7-8), and a temperature sensor (7-3) installed on the outer side wall of the settling chamber (7-1). An atomizing nozzle (7-6) is installed on the inner top. Water is supplied through inlet I (7-4) and water pipe I (7-5) to atomizing water inlet pipe I (7-9), then to atomizing water inlet pipe II (7-7) to supply solution to the outer ring atomizing nozzles. The solution is then supplied through atomizing water inlet pipe III (7-10) to atomizing water inlet pipe IV (7-11) to supply solution to the inner ring atomizing nozzles. A heater (9-1) is installed at the bottom, which heats the solution via a heating wire (9-2). The temperature is controlled by the temperature sensor (7-3). The heater (9-1) is equipped with a perforated plate system (8-1) at its upper part. The settling solution flows through the perforated plate (8-4) into the settling chamber (7-1) via the settling inlet pipe (8-6) and settling inlet (8-5). The solution volume is controlled by the level sensor V (7-8). A dust collector (10-1) is located on the left side of the settling chamber (7-1). The dust to be tested is added through the dust collection hopper (10-2), and a small air compressor pump (10-9) disperses the dust before it is introduced into the settling chamber (7-1) through the dust supply duct (10-3). The end of the dust supply duct (10-3) is equipped with a diffuser (10-8) and an airtight ring (10-7). The bottom of the settling chamber (7-1) is connected to the platform I (10-6). A miniature air pump (12-1) is located on the right side of the outside of the settling chamber (7-1). Air is discharged through the perforated plate (12-2). The air supply pipe (12-4) is connected to the settling air inlet (12-5). Air is then blown upward through the perforated plate (8-4). A high-speed camera (11-1) is located on the left side of the outside and is connected to the telescopic rod (11-4). The telescopic rod is connected to the platform II (11-5). A settling outlet (8-2) is located on the outside of the perforated plate system (8-1). Waste liquid is transported to the liquid circulation and waste liquid treatment subsystem (C) through the settling outlet pipe (8-3). The settling chamber (7-1) is made of transparent acrylic with a wall thickness of 5 μm. The structure is m in diameter, 40cm in height, and 60cm in height; the perforated plate (8-4) has a hole diameter of 0.5mm, a hole spacing of 2mm, and is made of transparent acrylic; the heater (9-1) has a temperature control range of 5~60℃ and an accuracy of ±0.3℃; the temperature sensor (7-3) is a PT100 temperature sensor with a fluctuation range of ±0.5℃; the dust feeding hopper (10-2) has a capacity of 500~1000g, quantitatively dispensing dust with an error of <0.1g; the diffuser (10-8) installed at the end of the dust supply duct (10-3) is a stainless steel wire mesh with a mesh count of 80; the micro air pump (12-1) has a flow rate controlled at 0.5-2L / min.

4. The intelligent testing system for the natural settling method of dust wettability according to claim 1, characterized in that, The liquid circulation and waste liquid treatment subsystem (C) has a double-layer filter in the middle of the waste liquid treatment tank (13-1). The upper layer has a stainless steel filter screen (13-2), and the lower layer has a ceramic membrane filter (13-3), which is designed to be detachable. A waste liquid inlet (13-7) is located at the top, and the waste liquid is transported through a waste liquid inlet pipe (13-8). A solenoid valve XI (13-9) on the waste liquid inlet pipe (13-8) controls its shut-off. A treated water outlet (13-4) and a treated water output pipe (13-6) are located at the bottom, through which the treated water is output. The pipeline (13-6) is equipped with a solenoid valve X (13-5) to control its shutdown. The waste liquid treatment tank (13-1) and the waste liquid pump (14) are connected by a vacuum gas supply pipeline (13-12) through a vacuum gas supply port (13-13). The stainless steel filter screen (13-2) is a 316L stainless steel porous plate with a thickness of 3mm, a surface polishing Ra<0.2μm, and a pore size of 0.5mm. The ceramic membrane filter (13-3) has a corundum tube as its filter element, with an outer diameter of 60mm, an inner diameter of 40mm, and a pore size of 0.2~10μm.

5. The intelligent testing system for the natural settling method of dust wettability according to claim 1, characterized in that, The data acquisition and environmental parameter control feedback subsystem (D) transmits the data monitored by the high-precision multi-channel peristaltic pump (1-1), level sensor I (3-5), level sensor II (4-5), level sensor III (5-5), level sensor IV (6-5), static mixer (2-1), and settling chamber (7-1) to the data acquisition instrument (16) via communication cable I (15). After preliminary processing by the data acquisition instrument (16), the data is uploaded to the network switch (18) via communication cable II (17). Then, the data is transmitted to the data processing, analysis, and feedback device (20) via the uplink data line (19). After the data processing is completed, the processed data is transmitted via the downlink data line. The data line (21) transmits data to the PLC controller (22). The PLC controller (22) is connected to the brushless DC servo motor (26) via a dedicated cable (25) and transmits the processed data to the main solenoid valve (24) via the communication cable III (23). The data processing, analysis and feedback device (20) includes multiple monitoring software models. Each software model adopts a subsystem structure, and each subsystem can independently execute different monitoring function modes. The PLC controller (22) has a subsystem structure and stores operation instructions in advance. It controls the opening and closing degree of the liquid delivery and pipeline solenoid valve through digital input and output, and adjusts the liquid concentration and pH value.

6. The intelligent testing method for the natural settling method of dust wettability according to any one of claims 1 to 5, characterized in that, The specific steps are as follows: (1) Preparation of dust suppression solution Prepare 1-2L of high-concentration dust suppression solution stock solution and store it in storage tank I (3-1). Add 2-4L of tap water and store it in storage tank II (4-1). Set the target dust suppression solution concentration using a high-precision multi-channel peristaltic pump (1-1). The high-precision multi-channel peristaltic pump (1-1) draws liquid from storage tanks I (3-1) and II (4-1) according to the required experimental proportion. The liquid is then transported to the high-precision multi-channel peristaltic pump (1-1) through storage outlets I (3-2) and II (4-2) via storage output pipes I (3-4) and II (4-4), respectively. The liquid is automatically shut off by solenoid valves VI (3-3) and VII (4-3). The liquid is then transported to the static mixer (2-1) through channels I (1-2) and II (1-3) via liquid output pipes I (1-6) and II (1-7), respectively. Turn on the impeller shaft (2-7) to drive the spiral blades (2-8) for stirring; the static mixer (2-1) has a built-in pH sensor (2-2) to read the pH value in real time. If it is necessary to adjust to the experimental target pH value (such as 7.0), the system links the high-precision multi-channel peristaltic pump (1-1) to transport the liquid from the storage tank III (5-1) and the storage tank IV (6-1) through the storage outlet III (5-2) and the storage outlet IV (6-2) to the high-precision multi-channel peristaltic pump (1-1), and then through the channel II (1-3) and the channel III (1-4) to the static mixer (2-1) through the liquid output pipe III (1-8) and the liquid output pipe IV (1-9), respectively. The prepared target solution is then transported to the settling chamber (7-1) through the liquid distribution outlet (2-3) and the liquid distribution transport pipe (2-4). (2) Dust loading and settling The data processing, analysis, and feedback device (14-6) selects the wettability test mode. If the spray dust suppression mode is selected, the prepared dust suppression solution is input into the spray system through the water inlet I (7-4) and the water supply pipe I (7-5). According to the preset mass, the pre-treated dust is put into the dust collector (10-1) through the sealed dust collection hopper (10-2). The dust is sent into the settling chamber (7-1) through the dust delivery duct (10-3) by the small air compressor pump (10-9). The micro air pump (12-1) at the bottom of the settling chamber (7-1) generates airflow through the settling air inlet (12-5) and the air supply pipe (12-4) into the settling chamber (7-1). The airflow is then passed through the bottom perforated plate (8). -4) Blow air upwards at a flow rate of 0.5L / min for 10 seconds. When the dust concentration reaches a stable level, turn on the spray system to wet the dust, causing it to condense and settle naturally. If the immersion and natural settling mode is selected, the prepared dust suppression solution is input into the perforated plate system (8-1) through the settling inlet (8-5) and the settling inlet pipe (8-6). It is then input into the settling chamber (7-1) through the perforated plate (8-4). The solution volume is determined by the liquid level sensor V (7-8). The target temperature of the dust suppression solution is set and preheated by the heating wire (9-2). Then, the dust is released in the same way as the spray dust suppression mode. The dust comes into contact with the dust suppression solution and is immersed until it is completely settled by natural settling. (3) Liquid circulation and waste liquid treatment After dust settling is complete, solenoid valve XI (13-9) is opened, and the liquid in the settling chamber (7-1) is pumped by waste liquid pump (13-12) through waste liquid inlet (13-7) and waste liquid inlet pipe (13-8) to waste liquid treatment tank (13-1). After double filtration by stainless steel filter screen (13-2) and ceramic membrane filter (13-3), the treated solution is classified and stored. After the experiment, the data processing, analysis and feedback device 20 automatically generates a report, integrates transmittance curve, settling time and environmental parameters, outputs PDF / Excel format report, and exports the settling state image of the system dust at each moment.

7. The intelligent testing method for the natural settling method of dust wettability according to claim 6, characterized in that, In the dust loading and settling steps, the pre-treated dust is sieved to a target particle size of 75-150 μm using an ultrasonic vibrating screen with an adjustable aperture of 50-200 μm. The sieved dust is then dried in a 60℃ vacuum drying oven for 24 hours. During the dust loading and settling process, a laser sensor (7-2) and a high-speed camera lens (11-2) continuously capture the dust wetting and settling state, and output the data as an image. A horizontal array of laser scattering sensors is arranged in the middle of the settling chamber to monitor the change in transmittance in real time at a wavelength of 650 nm. When the transmittance is ≥95%, the settling endpoint is determined, and the system automatically records the time with an error of <0.1 s.

8. The intelligent testing method for the natural settling method of dust wettability according to claim 6, characterized in that, In the liquid circulation and waste liquid treatment steps, after the waste liquid is completely transported to the waste liquid treatment tank (13-1), the pipeline is flushed, 200ml of deionized water is injected, the pipeline is circulated and flushed for 10 seconds, and the high-precision multi-channel peristaltic pump (1-1) re-injects the freshly prepared liquid according to the setting, and the liquid level sensor V (7-8) controls the injection volume; the environmental parameters include temperature and pH concentration.

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